diff options
Diffstat (limited to 'drivers/s390/scsi')
| -rw-r--r-- | drivers/s390/scsi/Makefile | 3 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_aux.c | 1689 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_ccw.c | 152 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_cfdc.c | 259 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_dbf.c | 90 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_dbf.h | 12 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_def.h | 341 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_erp.c | 3824 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_ext.h | 301 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_fc.c | 567 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_fsf.c | 5573 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_fsf.h | 70 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_qdio.c | 811 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_scsi.c | 784 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_sysfs.c | 496 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_sysfs_adapter.c | 270 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_sysfs_driver.c | 106 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_sysfs_port.c | 295 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_sysfs_unit.c | 167 |
19 files changed, 5379 insertions, 10431 deletions
diff --git a/drivers/s390/scsi/Makefile b/drivers/s390/scsi/Makefile index d6a78f1a2f1..cb301cc6178 100644 --- a/drivers/s390/scsi/Makefile +++ b/drivers/s390/scsi/Makefile @@ -3,7 +3,6 @@ # zfcp-objs := zfcp_aux.o zfcp_ccw.o zfcp_scsi.o zfcp_erp.o zfcp_qdio.o \ - zfcp_fsf.o zfcp_dbf.o zfcp_sysfs_adapter.o zfcp_sysfs_port.o \ - zfcp_sysfs_unit.o zfcp_sysfs_driver.o + zfcp_fsf.o zfcp_dbf.o zfcp_sysfs.o zfcp_fc.o zfcp_cfdc.o obj-$(CONFIG_ZFCP) += zfcp.o diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c index 8c7e2b778ef..90abfd06ed5 100644 --- a/drivers/s390/scsi/zfcp_aux.c +++ b/drivers/s390/scsi/zfcp_aux.c @@ -1,22 +1,9 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Module interface and handling of zfcp data structures. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ /* @@ -31,93 +18,25 @@ * Maxim Shchetynin * Volker Sameske * Ralph Wuerthner + * Michael Loehr + * Swen Schillig + * Christof Schmitt + * Martin Petermann + * Sven Schuetz */ +#include <linux/miscdevice.h> #include "zfcp_ext.h" -/* accumulated log level (module parameter) */ -static u32 loglevel = ZFCP_LOG_LEVEL_DEFAULTS; static char *device; -/*********************** FUNCTION PROTOTYPES *********************************/ - -/* written against the module interface */ -static int __init zfcp_module_init(void); - -/* FCP related */ -static void zfcp_ns_gid_pn_handler(unsigned long); - -/* miscellaneous */ -static int zfcp_sg_list_alloc(struct zfcp_sg_list *, size_t); -static void zfcp_sg_list_free(struct zfcp_sg_list *); -static int zfcp_sg_list_copy_from_user(struct zfcp_sg_list *, - void __user *, size_t); -static int zfcp_sg_list_copy_to_user(void __user *, - struct zfcp_sg_list *, size_t); -static long zfcp_cfdc_dev_ioctl(struct file *, unsigned int, unsigned long); - -#define ZFCP_CFDC_IOC_MAGIC 0xDD -#define ZFCP_CFDC_IOC \ - _IOWR(ZFCP_CFDC_IOC_MAGIC, 0, struct zfcp_cfdc_sense_data) - - -static const struct file_operations zfcp_cfdc_fops = { - .unlocked_ioctl = zfcp_cfdc_dev_ioctl, -#ifdef CONFIG_COMPAT - .compat_ioctl = zfcp_cfdc_dev_ioctl -#endif -}; - -static struct miscdevice zfcp_cfdc_misc = { - .minor = ZFCP_CFDC_DEV_MINOR, - .name = ZFCP_CFDC_DEV_NAME, - .fops = &zfcp_cfdc_fops -}; - -/*********************** KERNEL/MODULE PARAMETERS ***************************/ - -/* declare driver module init/cleanup functions */ -module_init(zfcp_module_init); MODULE_AUTHOR("IBM Deutschland Entwicklung GmbH - linux390@de.ibm.com"); -MODULE_DESCRIPTION - ("FCP (SCSI over Fibre Channel) HBA driver for IBM System z9 and zSeries"); +MODULE_DESCRIPTION("FCP HBA driver"); MODULE_LICENSE("GPL"); module_param(device, charp, 0400); MODULE_PARM_DESC(device, "specify initial device"); -module_param(loglevel, uint, 0400); -MODULE_PARM_DESC(loglevel, - "log levels, 8 nibbles: " - "FC ERP QDIO CIO Config FSF SCSI Other, " - "levels: 0=none 1=normal 2=devel 3=trace"); - -/****************************************************************/ -/************** Functions without logging ***********************/ -/****************************************************************/ - -void -_zfcp_hex_dump(char *addr, int count) -{ - int i; - for (i = 0; i < count; i++) { - printk("%02x", addr[i]); - if ((i % 4) == 3) - printk(" "); - if ((i % 32) == 31) - printk("\n"); - } - if (((i-1) % 32) != 31) - printk("\n"); -} - - -/****************************************************************/ -/****** Functions to handle the request ID hash table ********/ -/****************************************************************/ - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF - static int zfcp_reqlist_alloc(struct zfcp_adapter *adapter) { int idx; @@ -132,11 +51,12 @@ static int zfcp_reqlist_alloc(struct zfcp_adapter *adapter) return 0; } -static void zfcp_reqlist_free(struct zfcp_adapter *adapter) -{ - kfree(adapter->req_list); -} - +/** + * zfcp_reqlist_isempty - is the request list empty + * @adapter: pointer to struct zfcp_adapter + * + * Returns: true if list is empty, false otherwise + */ int zfcp_reqlist_isempty(struct zfcp_adapter *adapter) { unsigned int idx; @@ -147,62 +67,58 @@ int zfcp_reqlist_isempty(struct zfcp_adapter *adapter) return 1; } -#undef ZFCP_LOG_AREA - -/****************************************************************/ -/************** Uncategorised Functions *************************/ -/****************************************************************/ - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_OTHER - -/** - * zfcp_device_setup - setup function - * @str: pointer to parameter string - * - * Parse "device=..." parameter string. - */ -static int __init -zfcp_device_setup(char *devstr) +static int __init zfcp_device_setup(char *devstr) { - char *tmp, *str; - size_t len; + char *token; + char *str; if (!devstr) return 0; - len = strlen(devstr) + 1; - str = kmalloc(len, GFP_KERNEL); + /* duplicate devstr and keep the original for sysfs presentation*/ + str = kmalloc(strlen(devstr) + 1, GFP_KERNEL); if (!str) - goto err_out; - memcpy(str, devstr, len); + return 0; - tmp = strchr(str, ','); - if (!tmp) - goto err_out; - *tmp++ = '\0'; - strncpy(zfcp_data.init_busid, str, BUS_ID_SIZE); - zfcp_data.init_busid[BUS_ID_SIZE-1] = '\0'; + strcpy(str, devstr); - zfcp_data.init_wwpn = simple_strtoull(tmp, &tmp, 0); - if (*tmp++ != ',') + token = strsep(&str, ","); + if (!token || strlen(token) >= BUS_ID_SIZE) goto err_out; - if (*tmp == '\0') + strncpy(zfcp_data.init_busid, token, BUS_ID_SIZE); + + token = strsep(&str, ","); + if (!token || strict_strtoull(token, 0, &zfcp_data.init_wwpn)) goto err_out; - zfcp_data.init_fcp_lun = simple_strtoull(tmp, &tmp, 0); - if (*tmp != '\0') + token = strsep(&str, ","); + if (!token || strict_strtoull(token, 0, &zfcp_data.init_fcp_lun)) goto err_out; + kfree(str); return 1; err_out: - ZFCP_LOG_NORMAL("Parse error for device parameter string %s\n", str); kfree(str); + pr_err("zfcp: Parse error for device parameter string %s, " + "device not attached.\n", devstr); return 0; } -static void __init -zfcp_init_device_configure(void) +static struct zfcp_adapter *zfcp_get_adapter_by_busid(char *bus_id) +{ + struct zfcp_adapter *adapter; + + list_for_each_entry(adapter, &zfcp_data.adapter_list_head, list) + if ((strncmp(bus_id, adapter->ccw_device->dev.bus_id, + BUS_ID_SIZE) == 0) && + !(atomic_read(&adapter->status) & + ZFCP_STATUS_COMMON_REMOVE)) + return adapter; + return NULL; +} + +static void __init zfcp_init_device_configure(void) { struct zfcp_adapter *adapter; struct zfcp_port *port; @@ -215,101 +131,75 @@ zfcp_init_device_configure(void) zfcp_adapter_get(adapter); read_unlock_irq(&zfcp_data.config_lock); - if (adapter == NULL) + if (!adapter) goto out_adapter; port = zfcp_port_enqueue(adapter, zfcp_data.init_wwpn, 0, 0); - if (!port) + if (IS_ERR(port)) goto out_port; unit = zfcp_unit_enqueue(port, zfcp_data.init_fcp_lun); - if (!unit) + if (IS_ERR(unit)) goto out_unit; up(&zfcp_data.config_sema); ccw_device_set_online(adapter->ccw_device); zfcp_erp_wait(adapter); down(&zfcp_data.config_sema); zfcp_unit_put(unit); - out_unit: +out_unit: zfcp_port_put(port); - out_port: +out_port: zfcp_adapter_put(adapter); - out_adapter: +out_adapter: up(&zfcp_data.config_sema); return; } -static int calc_alignment(int size) +static struct kmem_cache *zfcp_cache_create(int size, char *name) { int align = 1; - - if (!size) - return 0; - while ((size - align) > 0) align <<= 1; - - return align; + return kmem_cache_create(name , size, align, 0, NULL); } -static int __init -zfcp_module_init(void) +static int __init zfcp_module_init(void) { int retval = -ENOMEM; - int size, align; - size = sizeof(struct zfcp_fsf_req_qtcb); - align = calc_alignment(size); - zfcp_data.fsf_req_qtcb_cache = - kmem_cache_create("zfcp_fsf", size, align, 0, NULL); + zfcp_data.fsf_req_qtcb_cache = zfcp_cache_create( + sizeof(struct zfcp_fsf_req_qtcb), "zfcp_fsf"); if (!zfcp_data.fsf_req_qtcb_cache) goto out; - size = sizeof(struct fsf_status_read_buffer); - align = calc_alignment(size); - zfcp_data.sr_buffer_cache = - kmem_cache_create("zfcp_sr", size, align, 0, NULL); + zfcp_data.sr_buffer_cache = zfcp_cache_create( + sizeof(struct fsf_status_read_buffer), "zfcp_sr"); if (!zfcp_data.sr_buffer_cache) goto out_sr_cache; - size = sizeof(struct zfcp_gid_pn_data); - align = calc_alignment(size); - zfcp_data.gid_pn_cache = - kmem_cache_create("zfcp_gid", size, align, 0, NULL); + zfcp_data.gid_pn_cache = zfcp_cache_create( + sizeof(struct zfcp_gid_pn_data), "zfcp_gid"); if (!zfcp_data.gid_pn_cache) goto out_gid_cache; - atomic_set(&zfcp_data.loglevel, loglevel); - - /* initialize adapter list */ INIT_LIST_HEAD(&zfcp_data.adapter_list_head); - - /* initialize adapters to be removed list head */ INIT_LIST_HEAD(&zfcp_data.adapter_remove_lh); + sema_init(&zfcp_data.config_sema, 1); + rwlock_init(&zfcp_data.config_lock); + zfcp_data.scsi_transport_template = fc_attach_transport(&zfcp_transport_functions); if (!zfcp_data.scsi_transport_template) goto out_transport; retval = misc_register(&zfcp_cfdc_misc); - if (retval != 0) { - ZFCP_LOG_INFO("registration of misc device " - "zfcp_cfdc failed\n"); + if (retval) { + pr_err("zfcp: registration of misc device zfcp_cfdc failed\n"); goto out_misc; } - ZFCP_LOG_TRACE("major/minor for zfcp_cfdc: %d/%d\n", - ZFCP_CFDC_DEV_MAJOR, zfcp_cfdc_misc.minor); - - /* Initialise proc semaphores */ - sema_init(&zfcp_data.config_sema, 1); - - /* initialise configuration rw lock */ - rwlock_init(&zfcp_data.config_lock); - - /* setup dynamic I/O */ retval = zfcp_ccw_register(); if (retval) { - ZFCP_LOG_NORMAL("registration with common I/O layer failed\n"); + pr_err("zfcp: Registration with common I/O layer failed.\n"); goto out_ccw_register; } @@ -318,527 +208,88 @@ zfcp_module_init(void) goto out; - out_ccw_register: +out_ccw_register: misc_deregister(&zfcp_cfdc_misc); - out_misc: +out_misc: fc_release_transport(zfcp_data.scsi_transport_template); - out_transport: +out_transport: kmem_cache_destroy(zfcp_data.gid_pn_cache); - out_gid_cache: +out_gid_cache: kmem_cache_destroy(zfcp_data.sr_buffer_cache); - out_sr_cache: +out_sr_cache: kmem_cache_destroy(zfcp_data.fsf_req_qtcb_cache); - out: +out: return retval; } -/* - * function: zfcp_cfdc_dev_ioctl - * - * purpose: Handle control file upload/download transaction via IOCTL - * interface - * - * returns: 0 - Operation completed successfuly - * -ENOTTY - Unknown IOCTL command - * -EINVAL - Invalid sense data record - * -ENXIO - The FCP adapter is not available - * -EOPNOTSUPP - The FCP adapter does not have CFDC support - * -ENOMEM - Insufficient memory - * -EFAULT - User space memory I/O operation fault - * -EPERM - Cannot create or queue FSF request or create SBALs - * -ERESTARTSYS- Received signal (is mapped to EAGAIN by VFS) - */ -static long -zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command, - unsigned long buffer) -{ - struct zfcp_cfdc_sense_data *sense_data, __user *sense_data_user; - struct zfcp_adapter *adapter = NULL; - struct zfcp_fsf_req *fsf_req = NULL; - struct zfcp_sg_list *sg_list = NULL; - u32 fsf_command, option; - char *bus_id = NULL; - int retval = 0; - - sense_data = kmalloc(sizeof(struct zfcp_cfdc_sense_data), GFP_KERNEL); - if (sense_data == NULL) { - retval = -ENOMEM; - goto out; - } - - sg_list = kzalloc(sizeof(struct zfcp_sg_list), GFP_KERNEL); - if (sg_list == NULL) { - retval = -ENOMEM; - goto out; - } - - if (command != ZFCP_CFDC_IOC) { - ZFCP_LOG_INFO("IOC request code 0x%x invalid\n", command); - retval = -ENOTTY; - goto out; - } - - if ((sense_data_user = (void __user *) buffer) == NULL) { - ZFCP_LOG_INFO("sense data record is required\n"); - retval = -EINVAL; - goto out; - } - - retval = copy_from_user(sense_data, sense_data_user, - sizeof(struct zfcp_cfdc_sense_data)); - if (retval) { - retval = -EFAULT; - goto out; - } - - if (sense_data->signature != ZFCP_CFDC_SIGNATURE) { - ZFCP_LOG_INFO("invalid sense data request signature 0x%08x\n", - ZFCP_CFDC_SIGNATURE); - retval = -EINVAL; - goto out; - } - - switch (sense_data->command) { - - case ZFCP_CFDC_CMND_DOWNLOAD_NORMAL: - fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; - option = FSF_CFDC_OPTION_NORMAL_MODE; - break; - - case ZFCP_CFDC_CMND_DOWNLOAD_FORCE: - fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; - option = FSF_CFDC_OPTION_FORCE; - break; - - case ZFCP_CFDC_CMND_FULL_ACCESS: - fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; - option = FSF_CFDC_OPTION_FULL_ACCESS; - break; - - case ZFCP_CFDC_CMND_RESTRICTED_ACCESS: - fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; - option = FSF_CFDC_OPTION_RESTRICTED_ACCESS; - break; - - case ZFCP_CFDC_CMND_UPLOAD: - fsf_command = FSF_QTCB_UPLOAD_CONTROL_FILE; - option = 0; - break; - - default: - ZFCP_LOG_INFO("invalid command code 0x%08x\n", - sense_data->command); - retval = -EINVAL; - goto out; - } - - bus_id = kmalloc(BUS_ID_SIZE, GFP_KERNEL); - if (bus_id == NULL) { - retval = -ENOMEM; - goto out; - } - snprintf(bus_id, BUS_ID_SIZE, "%d.%d.%04x", - (sense_data->devno >> 24), - (sense_data->devno >> 16) & 0xFF, - (sense_data->devno & 0xFFFF)); - - read_lock_irq(&zfcp_data.config_lock); - adapter = zfcp_get_adapter_by_busid(bus_id); - if (adapter) - zfcp_adapter_get(adapter); - read_unlock_irq(&zfcp_data.config_lock); - - kfree(bus_id); - - if (adapter == NULL) { - ZFCP_LOG_INFO("invalid adapter\n"); - retval = -ENXIO; - goto out; - } - - if (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE) { - retval = zfcp_sg_list_alloc(sg_list, - ZFCP_CFDC_MAX_CONTROL_FILE_SIZE); - if (retval) { - retval = -ENOMEM; - goto out; - } - } - - if ((sense_data->command & ZFCP_CFDC_DOWNLOAD) && - (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE)) { - retval = zfcp_sg_list_copy_from_user( - sg_list, &sense_data_user->control_file, - ZFCP_CFDC_MAX_CONTROL_FILE_SIZE); - if (retval) { - retval = -EFAULT; - goto out; - } - } - - retval = zfcp_fsf_control_file(adapter, &fsf_req, fsf_command, - option, sg_list); - if (retval) - goto out; - - if ((fsf_req->qtcb->prefix.prot_status != FSF_PROT_GOOD) && - (fsf_req->qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) { - retval = -ENXIO; - goto out; - } - - sense_data->fsf_status = fsf_req->qtcb->header.fsf_status; - memcpy(&sense_data->fsf_status_qual, - &fsf_req->qtcb->header.fsf_status_qual, - sizeof(union fsf_status_qual)); - memcpy(&sense_data->payloads, &fsf_req->qtcb->bottom.support.els, 256); - - retval = copy_to_user(sense_data_user, sense_data, - sizeof(struct zfcp_cfdc_sense_data)); - if (retval) { - retval = -EFAULT; - goto out; - } - - if (sense_data->command & ZFCP_CFDC_UPLOAD) { - retval = zfcp_sg_list_copy_to_user( - &sense_data_user->control_file, sg_list, - ZFCP_CFDC_MAX_CONTROL_FILE_SIZE); - if (retval) { - retval = -EFAULT; - goto out; - } - } - - out: - if (fsf_req != NULL) - zfcp_fsf_req_free(fsf_req); - - if ((adapter != NULL) && (retval != -ENXIO)) - zfcp_adapter_put(adapter); - - if (sg_list != NULL) { - zfcp_sg_list_free(sg_list); - kfree(sg_list); - } - - kfree(sense_data); - - return retval; -} - - -/** - * zfcp_sg_list_alloc - create a scatter-gather list of the specified size - * @sg_list: structure describing a scatter gather list - * @size: size of scatter-gather list - * Return: 0 on success, else -ENOMEM - * - * In sg_list->sg a pointer to the created scatter-gather list is returned, - * or NULL if we run out of memory. sg_list->count specifies the number of - * elements of the scatter-gather list. The maximum size of a single element - * in the scatter-gather list is PAGE_SIZE. - */ -static int -zfcp_sg_list_alloc(struct zfcp_sg_list *sg_list, size_t size) -{ - struct scatterlist *sg; - unsigned int i; - int retval = 0; - void *address; - - BUG_ON(sg_list == NULL); - - sg_list->count = size >> PAGE_SHIFT; - if (size & ~PAGE_MASK) - sg_list->count++; - sg_list->sg = kcalloc(sg_list->count, sizeof(struct scatterlist), - GFP_KERNEL); - if (sg_list->sg == NULL) { - sg_list->count = 0; - retval = -ENOMEM; - goto out; - } - sg_init_table(sg_list->sg, sg_list->count); - - for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++) { - address = (void *) get_zeroed_page(GFP_KERNEL); - if (address == NULL) { - sg_list->count = i; - zfcp_sg_list_free(sg_list); - retval = -ENOMEM; - goto out; - } - zfcp_address_to_sg(address, sg, min(size, PAGE_SIZE)); - size -= sg->length; - } - - out: - return retval; -} - - -/** - * zfcp_sg_list_free - free memory of a scatter-gather list - * @sg_list: structure describing a scatter-gather list - * - * Memory for each element in the scatter-gather list is freed. - * Finally sg_list->sg is freed itself and sg_list->count is reset. - */ -static void -zfcp_sg_list_free(struct zfcp_sg_list *sg_list) -{ - struct scatterlist *sg; - unsigned int i; - - BUG_ON(sg_list == NULL); - - for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++) - free_page((unsigned long) zfcp_sg_to_address(sg)); - - sg_list->count = 0; - kfree(sg_list->sg); -} - -/** - * zfcp_sg_size - determine size of a scatter-gather list - * @sg: array of (struct scatterlist) - * @sg_count: elements in array - * Return: size of entire scatter-gather list - */ -static size_t zfcp_sg_size(struct scatterlist *sg, unsigned int sg_count) -{ - unsigned int i; - struct scatterlist *p; - size_t size; - - size = 0; - for (i = 0, p = sg; i < sg_count; i++, p++) { - BUG_ON(p == NULL); - size += p->length; - } - - return size; -} - - -/** - * zfcp_sg_list_copy_from_user -copy data from user space to scatter-gather list - * @sg_list: structure describing a scatter-gather list - * @user_buffer: pointer to buffer in user space - * @size: number of bytes to be copied - * Return: 0 on success, -EFAULT if copy_from_user fails. - */ -static int -zfcp_sg_list_copy_from_user(struct zfcp_sg_list *sg_list, - void __user *user_buffer, - size_t size) -{ - struct scatterlist *sg; - unsigned int length; - void *zfcp_buffer; - int retval = 0; - - BUG_ON(sg_list == NULL); - - if (zfcp_sg_size(sg_list->sg, sg_list->count) < size) - return -EFAULT; - - for (sg = sg_list->sg; size > 0; sg++) { - length = min((unsigned int)size, sg->length); - zfcp_buffer = zfcp_sg_to_address(sg); - if (copy_from_user(zfcp_buffer, user_buffer, length)) { - retval = -EFAULT; - goto out; - } - user_buffer += length; - size -= length; - } - - out: - return retval; -} - - -/** - * zfcp_sg_list_copy_to_user - copy data from scatter-gather list to user space - * @user_buffer: pointer to buffer in user space - * @sg_list: structure describing a scatter-gather list - * @size: number of bytes to be copied - * Return: 0 on success, -EFAULT if copy_to_user fails - */ -static int -zfcp_sg_list_copy_to_user(void __user *user_buffer, - struct zfcp_sg_list *sg_list, - size_t size) -{ - struct scatterlist *sg; - unsigned int length; - void *zfcp_buffer; - int retval = 0; - - BUG_ON(sg_list == NULL); - - if (zfcp_sg_size(sg_list->sg, sg_list->count) < size) - return -EFAULT; - - for (sg = sg_list->sg; size > 0; sg++) { - length = min((unsigned int) size, sg->length); - zfcp_buffer = zfcp_sg_to_address(sg); - if (copy_to_user(user_buffer, zfcp_buffer, length)) { - retval = -EFAULT; - goto out; - } - user_buffer += length; - size -= length; - } - - out: - return retval; -} - - -#undef ZFCP_LOG_AREA - -/****************************************************************/ -/****** Functions for configuration/set-up of structures ********/ -/****************************************************************/ - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG +module_init(zfcp_module_init); /** * zfcp_get_unit_by_lun - find unit in unit list of port by FCP LUN * @port: pointer to port to search for unit * @fcp_lun: FCP LUN to search for - * Traverse list of all units of a port and return pointer to a unit - * with the given FCP LUN. + * + * Returns: pointer to zfcp_unit or NULL */ -struct zfcp_unit * -zfcp_get_unit_by_lun(struct zfcp_port *port, fcp_lun_t fcp_lun) +struct zfcp_unit *zfcp_get_unit_by_lun(struct zfcp_port *port, + fcp_lun_t fcp_lun) { struct zfcp_unit *unit; - int found = 0; - list_for_each_entry(unit, &port->unit_list_head, list) { + list_for_each_entry(unit, &port->unit_list_head, list) if ((unit->fcp_lun == fcp_lun) && - !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status)) - { - found = 1; - break; - } - } - return found ? unit : NULL; + !(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_REMOVE)) + return unit; + return NULL; } /** * zfcp_get_port_by_wwpn - find port in port list of adapter by wwpn * @adapter: pointer to adapter to search for port * @wwpn: wwpn to search for - * Traverse list of all ports of an adapter and return pointer to a port - * with the given wwpn. - */ -struct zfcp_port * -zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter, wwn_t wwpn) -{ - struct zfcp_port *port; - int found = 0; - - list_for_each_entry(port, &adapter->port_list_head, list) { - if ((port->wwpn == wwpn) && - !(atomic_read(&port->status) & - (ZFCP_STATUS_PORT_NO_WWPN | ZFCP_STATUS_COMMON_REMOVE))) { - found = 1; - break; - } - } - return found ? port : NULL; -} - -/** - * zfcp_get_port_by_did - find port in port list of adapter by d_id - * @adapter: pointer to adapter to search for port - * @d_id: d_id to search for - * Traverse list of all ports of an adapter and return pointer to a port - * with the given d_id. + * + * Returns: pointer to zfcp_port or NULL */ -struct zfcp_port * -zfcp_get_port_by_did(struct zfcp_adapter *adapter, u32 d_id) +struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter, + wwn_t wwpn) { struct zfcp_port *port; - int found = 0; - list_for_each_entry(port, &adapter->port_list_head, list) { - if ((port->d_id == d_id) && - !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) - { - found = 1; - break; - } - } - return found ? port : NULL; + list_for_each_entry(port, &adapter->port_list_head, list) + if ((port->wwpn == wwpn) && !(atomic_read(&port->status) & + (ZFCP_STATUS_PORT_NO_WWPN | ZFCP_STATUS_COMMON_REMOVE))) + return port; + return NULL; } -/** - * zfcp_get_adapter_by_busid - find adpater in adapter list by bus_id - * @bus_id: bus_id to search for - * Traverse list of all adapters and return pointer to an adapter - * with the given bus_id. - */ -struct zfcp_adapter * -zfcp_get_adapter_by_busid(char *bus_id) +static void zfcp_sysfs_unit_release(struct device *dev) { - struct zfcp_adapter *adapter; - int found = 0; - - list_for_each_entry(adapter, &zfcp_data.adapter_list_head, list) { - if ((strncmp(bus_id, zfcp_get_busid_by_adapter(adapter), - BUS_ID_SIZE) == 0) && - !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, - &adapter->status)){ - found = 1; - break; - } - } - return found ? adapter : NULL; + kfree(container_of(dev, struct zfcp_unit, sysfs_device)); } /** * zfcp_unit_enqueue - enqueue unit to unit list of a port. * @port: pointer to port where unit is added * @fcp_lun: FCP LUN of unit to be enqueued - * Return: pointer to enqueued unit on success, NULL on error + * Returns: pointer to enqueued unit on success, ERR_PTR on error * Locks: config_sema must be held to serialize changes to the unit list * * Sets up some unit internal structures and creates sysfs entry. */ -struct zfcp_unit * -zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun) +struct zfcp_unit *zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun) { struct zfcp_unit *unit; - /* - * check that there is no unit with this FCP_LUN already in list - * and enqueue it. - * Note: Unlike for the adapter and the port, this is an error - */ - read_lock_irq(&zfcp_data.config_lock); - unit = zfcp_get_unit_by_lun(port, fcp_lun); - read_unlock_irq(&zfcp_data.config_lock); - if (unit) - return NULL; - - unit = kzalloc(sizeof (struct zfcp_unit), GFP_KERNEL); + unit = kzalloc(sizeof(struct zfcp_unit), GFP_KERNEL); if (!unit) - return NULL; + return ERR_PTR(-ENOMEM); - /* initialise reference count stuff */ atomic_set(&unit->refcount, 0); init_waitqueue_head(&unit->remove_wq); unit->port = port; unit->fcp_lun = fcp_lun; - /* setup for sysfs registration */ snprintf(unit->sysfs_device.bus_id, BUS_ID_SIZE, "0x%016llx", fcp_lun); unit->sysfs_device.parent = &port->sysfs_device; unit->sysfs_device.release = zfcp_sysfs_unit_release; @@ -847,14 +298,28 @@ zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun) /* mark unit unusable as long as sysfs registration is not complete */ atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); - if (device_register(&unit->sysfs_device)) { - kfree(unit); - return NULL; + spin_lock_init(&unit->latencies.lock); + unit->latencies.write.channel.min = 0xFFFFFFFF; + unit->latencies.write.fabric.min = 0xFFFFFFFF; + unit->latencies.read.channel.min = 0xFFFFFFFF; + unit->latencies.read.fabric.min = 0xFFFFFFFF; + unit->latencies.cmd.channel.min = 0xFFFFFFFF; + unit->latencies.cmd.fabric.min = 0xFFFFFFFF; + + read_lock_irq(&zfcp_data.config_lock); + if (zfcp_get_unit_by_lun(port, fcp_lun)) { + read_unlock_irq(&zfcp_data.config_lock); + goto err_out_free; } + read_unlock_irq(&zfcp_data.config_lock); - if (zfcp_sysfs_unit_create_files(&unit->sysfs_device)) { + if (device_register(&unit->sysfs_device)) + goto err_out_free; + + if (sysfs_create_group(&unit->sysfs_device.kobj, + &zfcp_sysfs_unit_attrs)) { device_unregister(&unit->sysfs_device); - return NULL; + return ERR_PTR(-EIO); } zfcp_unit_get(unit); @@ -864,16 +329,27 @@ zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun) list_add_tail(&unit->list, &port->unit_list_head); atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status); + write_unlock_irq(&zfcp_data.config_lock); port->units++; zfcp_port_get(port); return unit; + +err_out_free: + kfree(unit); + return ERR_PTR(-EINVAL); } -void -zfcp_unit_dequeue(struct zfcp_unit *unit) +/** + * zfcp_unit_dequeue - dequeue unit + * @unit: pointer to zfcp_unit + * + * waits until all work is done on unit and removes it then from the unit->list + * of the associated port. + */ +void zfcp_unit_dequeue(struct zfcp_unit *unit) { zfcp_unit_wait(unit); write_lock_irq(&zfcp_data.config_lock); @@ -881,68 +357,51 @@ zfcp_unit_dequeue(struct zfcp_unit *unit) write_unlock_irq(&zfcp_data.config_lock); unit->port->units--; zfcp_port_put(unit->port); - zfcp_sysfs_unit_remove_files(&unit->sysfs_device); + sysfs_remove_group(&unit->sysfs_device.kobj, &zfcp_sysfs_unit_attrs); device_unregister(&unit->sysfs_device); } -/* - * Allocates a combined QTCB/fsf_req buffer for erp actions and fcp/SCSI - * commands. - * It also genrates fcp-nameserver request/response buffer and unsolicited - * status read fsf_req buffers. - * - * locks: must only be called with zfcp_data.config_sema taken - */ -static int -zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter) +static int zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter) { + /* must only be called with zfcp_data.config_sema taken */ adapter->pool.fsf_req_erp = - mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_ERP_NR, - zfcp_data.fsf_req_qtcb_cache); + mempool_create_slab_pool(1, zfcp_data.fsf_req_qtcb_cache); if (!adapter->pool.fsf_req_erp) return -ENOMEM; adapter->pool.fsf_req_scsi = - mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_SCSI_NR, - zfcp_data.fsf_req_qtcb_cache); + mempool_create_slab_pool(1, zfcp_data.fsf_req_qtcb_cache); if (!adapter->pool.fsf_req_scsi) return -ENOMEM; adapter->pool.fsf_req_abort = - mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_ABORT_NR, - zfcp_data.fsf_req_qtcb_cache); + mempool_create_slab_pool(1, zfcp_data.fsf_req_qtcb_cache); if (!adapter->pool.fsf_req_abort) return -ENOMEM; adapter->pool.fsf_req_status_read = - mempool_create_kmalloc_pool(ZFCP_POOL_STATUS_READ_NR, + mempool_create_kmalloc_pool(FSF_STATUS_READS_RECOM, sizeof(struct zfcp_fsf_req)); if (!adapter->pool.fsf_req_status_read) return -ENOMEM; adapter->pool.data_status_read = - mempool_create_slab_pool(ZFCP_POOL_STATUS_READ_NR, + mempool_create_slab_pool(FSF_STATUS_READS_RECOM, zfcp_data.sr_buffer_cache); if (!adapter->pool.data_status_read) return -ENOMEM; adapter->pool.data_gid_pn = - mempool_create_slab_pool(ZFCP_POOL_DATA_GID_PN_NR, - zfcp_data.gid_pn_cache); + mempool_create_slab_pool(1, zfcp_data.gid_pn_cache); if (!adapter->pool.data_gid_pn) return -ENOMEM; return 0; } -/** - * zfcp_free_low_mem_buffers - free memory pools of an adapter - * @adapter: pointer to zfcp_adapter for which memory pools should be freed - * locking: zfcp_data.config_sema must be held - */ -static void -zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter) +static void zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter) { + /* zfcp_data.config_sema must be held */ if (adapter->pool.fsf_req_erp) mempool_destroy(adapter->pool.fsf_req_erp); if (adapter->pool.fsf_req_scsi) @@ -962,20 +421,61 @@ static void zfcp_dummy_release(struct device *dev) return; } -/* +/** + * zfcp_status_read_refill - refill the long running status_read_requests + * @adapter: ptr to struct zfcp_adapter for which the buffers should be refilled + * + * Returns: 0 on success, 1 otherwise + * + * if there are 16 or more status_read requests missing an adapter_reopen + * is triggered + */ +int zfcp_status_read_refill(struct zfcp_adapter *adapter) +{ + while (atomic_read(&adapter->stat_miss) > 0) + if (zfcp_fsf_status_read(adapter)) { + if (atomic_read(&adapter->stat_miss) >= 16) { + zfcp_erp_adapter_reopen(adapter, 0, 103, NULL); + return 1; + } + break; + } else + atomic_dec(&adapter->stat_miss); + return 0; +} + +static void _zfcp_status_read_scheduler(struct work_struct *work) +{ + zfcp_status_read_refill(container_of(work, struct zfcp_adapter, + stat_work)); +} + +static int zfcp_nameserver_enqueue(struct zfcp_adapter *adapter) +{ + struct zfcp_port *port; + + port = zfcp_port_enqueue(adapter, 0, ZFCP_STATUS_PORT_WKA, + ZFCP_DID_DIRECTORY_SERVICE); + if (IS_ERR(port)) + return PTR_ERR(port); + zfcp_port_put(port); + + return 0; +} + +/** + * zfcp_adapter_enqueue - enqueue a new adapter to the list + * @ccw_device: pointer to the struct cc_device + * + * Returns: 0 if a new adapter was successfully enqueued + * -ENOMEM if alloc failed * Enqueues an adapter at the end of the adapter list in the driver data. * All adapter internal structures are set up. * Proc-fs entries are also created. - * - * returns: 0 if a new adapter was successfully enqueued - * ZFCP_KNOWN if an adapter with this devno was already present - * -ENOMEM if alloc failed * locks: config_sema must be held to serialise changes to the adapter list */ -struct zfcp_adapter * -zfcp_adapter_enqueue(struct ccw_device *ccw_device) +int zfcp_adapter_enqueue(struct ccw_device *ccw_device) { - int retval = 0; struct zfcp_adapter *adapter; /* @@ -983,85 +483,58 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) * are protected by the config_sema, which must be held to get here */ - /* try to allocate new adapter data structure (zeroed) */ - adapter = kzalloc(sizeof (struct zfcp_adapter), GFP_KERNEL); - if (!adapter) { - ZFCP_LOG_INFO("error: allocation of base adapter " - "structure failed\n"); - goto out; - } + adapter = kzalloc(sizeof(struct zfcp_adapter), GFP_KERNEL); + if (!adapter) + return -ENOMEM; ccw_device->handler = NULL; - - /* save ccw_device pointer */ adapter->ccw_device = ccw_device; + atomic_set(&adapter->refcount, 0); - retval = zfcp_qdio_allocate_queues(adapter); - if (retval) - goto queues_alloc_failed; - - retval = zfcp_qdio_allocate(adapter); - if (retval) + if (zfcp_qdio_allocate(adapter)) goto qdio_allocate_failed; - retval = zfcp_allocate_low_mem_buffers(adapter); - if (retval) { - ZFCP_LOG_INFO("error: pool allocation failed\n"); + if (zfcp_allocate_low_mem_buffers(adapter)) goto failed_low_mem_buffers; - } - /* initialise reference count stuff */ - atomic_set(&adapter->refcount, 0); + if (zfcp_reqlist_alloc(adapter)) + goto failed_low_mem_buffers; + + if (zfcp_adapter_debug_register(adapter)) + goto debug_register_failed; + init_waitqueue_head(&adapter->remove_wq); + init_waitqueue_head(&adapter->erp_thread_wqh); + init_waitqueue_head(&adapter->erp_done_wqh); - /* initialise list of ports */ INIT_LIST_HEAD(&adapter->port_list_head); - - /* initialise list of ports to be removed */ INIT_LIST_HEAD(&adapter->port_remove_lh); + INIT_LIST_HEAD(&adapter->erp_ready_head); + INIT_LIST_HEAD(&adapter->erp_running_head); - /* initialize list of fsf requests */ spin_lock_init(&adapter->req_list_lock); - retval = zfcp_reqlist_alloc(adapter); - if (retval) { - ZFCP_LOG_INFO("request list initialization failed\n"); - goto failed_low_mem_buffers; - } - - /* initialize debug locks */ spin_lock_init(&adapter->hba_dbf_lock); spin_lock_init(&adapter->san_dbf_lock); spin_lock_init(&adapter->scsi_dbf_lock); spin_lock_init(&adapter->rec_dbf_lock); - - retval = zfcp_adapter_debug_register(adapter); - if (retval) - goto debug_register_failed; - - /* initialize error recovery stuff */ + spin_lock_init(&adapter->req_q.lock); rwlock_init(&adapter->erp_lock); - sema_init(&adapter->erp_ready_sem, 0); - INIT_LIST_HEAD(&adapter->erp_ready_head); - INIT_LIST_HEAD(&adapter->erp_running_head); - - /* initialize abort lock */ rwlock_init(&adapter->abort_lock); - /* initialise some erp stuff */ - init_waitqueue_head(&adapter->erp_thread_wqh); - init_waitqueue_head(&adapter->erp_done_wqh); + sema_init(&adapter->erp_ready_sem, 0); - /* initialize lock of associated request queue */ - rwlock_init(&adapter->request_queue.queue_lock); + INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler); + INIT_WORK(&adapter->scan_work, _zfcp_scan_ports_later); /* mark adapter unusable as long as sysfs registration is not complete */ atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); dev_set_drvdata(&ccw_device->dev, adapter); - if (zfcp_sysfs_adapter_create_files(&ccw_device->dev)) + if (sysfs_create_group(&ccw_device->dev.kobj, + &zfcp_sysfs_adapter_attrs)) goto sysfs_failed; adapter->generic_services.parent = &adapter->ccw_device->dev; @@ -1072,7 +545,6 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) if (device_register(&adapter->generic_services)) goto generic_services_failed; - /* put allocated adapter at list tail */ write_lock_irq(&zfcp_data.config_lock); atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); list_add_tail(&adapter->list, &zfcp_data.adapter_list_head); @@ -1080,57 +552,49 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) zfcp_data.adapters++; - goto out; + zfcp_nameserver_enqueue(adapter); + + return 0; - generic_services_failed: - zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev); - sysfs_failed: +generic_services_failed: + sysfs_remove_group(&ccw_device->dev.kobj, + &zfcp_sysfs_adapter_attrs); +sysfs_failed: zfcp_adapter_debug_unregister(adapter); - debug_register_failed: +debug_register_failed: dev_set_drvdata(&ccw_device->dev, NULL); - zfcp_reqlist_free(adapter); - failed_low_mem_buffers: + kfree(adapter->req_list); +failed_low_mem_buffers: zfcp_free_low_mem_buffers(adapter); - if (qdio_free(ccw_device) != 0) - ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n", - zfcp_get_busid_by_adapter(adapter)); - qdio_allocate_failed: - zfcp_qdio_free_queues(adapter); - queues_alloc_failed: +qdio_allocate_failed: + zfcp_qdio_free(adapter); kfree(adapter); - adapter = NULL; - out: - return adapter; + return -ENOMEM; } -/* - * returns: 0 - struct zfcp_adapter data structure successfully removed - * !0 - struct zfcp_adapter data structure could not be removed - * (e.g. still used) +/** + * zfcp_adapter_dequeue - remove the adapter from the resource list + * @adapter: pointer to struct zfcp_adapter which should be removed * locks: adapter list write lock is assumed to be held by caller */ -void -zfcp_adapter_dequeue(struct zfcp_adapter *adapter) +void zfcp_adapter_dequeue(struct zfcp_adapter *adapter) { int retval = 0; unsigned long flags; + cancel_work_sync(&adapter->scan_work); + cancel_work_sync(&adapter->stat_work); zfcp_adapter_scsi_unregister(adapter); device_unregister(&adapter->generic_services); - zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev); + sysfs_remove_group(&adapter->ccw_device->dev.kobj, + &zfcp_sysfs_adapter_attrs); dev_set_drvdata(&adapter->ccw_device->dev, NULL); /* sanity check: no pending FSF requests */ spin_lock_irqsave(&adapter->req_list_lock, flags); retval = zfcp_reqlist_isempty(adapter); spin_unlock_irqrestore(&adapter->req_list_lock, flags); - if (!retval) { - ZFCP_LOG_NORMAL("bug: adapter %s (%p) still in use, " - "%i requests outstanding\n", - zfcp_get_busid_by_adapter(adapter), adapter, - atomic_read(&adapter->reqs_active)); - retval = -EBUSY; - goto out; - } + if (!retval) + return; zfcp_adapter_debug_unregister(adapter); @@ -1142,26 +606,18 @@ zfcp_adapter_dequeue(struct zfcp_adapter *adapter) /* decrease number of adapters in list */ zfcp_data.adapters--; - ZFCP_LOG_TRACE("adapter %s (%p) removed from list, " - "%i adapters still in list\n", - zfcp_get_busid_by_adapter(adapter), - adapter, zfcp_data.adapters); - - retval = qdio_free(adapter->ccw_device); - if (retval) - ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n", - zfcp_get_busid_by_adapter(adapter)); + zfcp_qdio_free(adapter); zfcp_free_low_mem_buffers(adapter); - /* free memory of adapter data structure and queues */ - zfcp_qdio_free_queues(adapter); - zfcp_reqlist_free(adapter); + kfree(adapter->req_list); kfree(adapter->fc_stats); kfree(adapter->stats_reset_data); - ZFCP_LOG_TRACE("freeing adapter structure\n"); kfree(adapter); - out: - return; +} + +static void zfcp_sysfs_port_release(struct device *dev) +{ + kfree(container_of(dev, struct zfcp_port, sysfs_device)); } /** @@ -1170,98 +626,90 @@ zfcp_adapter_dequeue(struct zfcp_adapter *adapter) * @wwpn: WWPN of the remote port to be enqueued * @status: initial status for the port * @d_id: destination id of the remote port to be enqueued - * Return: pointer to enqueued port on success, NULL on error + * Returns: pointer to enqueued port on success, ERR_PTR on error * Locks: config_sema must be held to serialize changes to the port list * * All port internal structures are set up and the sysfs entry is generated. * d_id is used to enqueue ports with a well known address like the Directory * Service for nameserver lookup. */ -struct zfcp_port * -zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn, u32 status, - u32 d_id) +struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn, + u32 status, u32 d_id) { struct zfcp_port *port; - int check_wwpn; - - check_wwpn = !(status & ZFCP_STATUS_PORT_NO_WWPN); - /* - * check that there is no port with this WWPN already in list - */ - if (check_wwpn) { - read_lock_irq(&zfcp_data.config_lock); - port = zfcp_get_port_by_wwpn(adapter, wwpn); - read_unlock_irq(&zfcp_data.config_lock); - if (port) - return NULL; - } + int retval; + char *bus_id; - port = kzalloc(sizeof (struct zfcp_port), GFP_KERNEL); + port = kzalloc(sizeof(struct zfcp_port), GFP_KERNEL); if (!port) - return NULL; + return ERR_PTR(-ENOMEM); - /* initialise reference count stuff */ - atomic_set(&port->refcount, 0); init_waitqueue_head(&port->remove_wq); INIT_LIST_HEAD(&port->unit_list_head); INIT_LIST_HEAD(&port->unit_remove_lh); port->adapter = adapter; + port->d_id = d_id; + port->wwpn = wwpn; - if (check_wwpn) - port->wwpn = wwpn; - - atomic_set_mask(status, &port->status); + /* mark port unusable as long as sysfs registration is not complete */ + atomic_set_mask(status | ZFCP_STATUS_COMMON_REMOVE, &port->status); + atomic_set(&port->refcount, 0); - /* setup for sysfs registration */ if (status & ZFCP_STATUS_PORT_WKA) { switch (d_id) { case ZFCP_DID_DIRECTORY_SERVICE: - snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, - "directory"); + bus_id = "directory"; break; case ZFCP_DID_MANAGEMENT_SERVICE: - snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, - "management"); + bus_id = "management"; break; case ZFCP_DID_KEY_DISTRIBUTION_SERVICE: - snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, - "key_distribution"); + bus_id = "key_distribution"; break; case ZFCP_DID_ALIAS_SERVICE: - snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, - "alias"); + bus_id = "alias"; break; case ZFCP_DID_TIME_SERVICE: - snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, - "time"); + bus_id = "time"; break; default: kfree(port); - return NULL; + return ERR_PTR(-EINVAL); } - port->d_id = d_id; + snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, "%s", bus_id); port->sysfs_device.parent = &adapter->generic_services; } else { snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, "0x%016llx", wwpn); port->sysfs_device.parent = &adapter->ccw_device->dev; } + port->sysfs_device.release = zfcp_sysfs_port_release; dev_set_drvdata(&port->sysfs_device, port); - /* mark port unusable as long as sysfs registration is not complete */ - atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); + read_lock_irq(&zfcp_data.config_lock); + if (!(status & ZFCP_STATUS_PORT_NO_WWPN)) + if (zfcp_get_port_by_wwpn(adapter, wwpn)) { + read_unlock_irq(&zfcp_data.config_lock); + goto err_out_free; + } + read_unlock_irq(&zfcp_data.config_lock); - if (device_register(&port->sysfs_device)) { - kfree(port); - return NULL; - } + if (device_register(&port->sysfs_device)) + goto err_out_free; + + if (status & ZFCP_STATUS_PORT_WKA) + retval = sysfs_create_group(&port->sysfs_device.kobj, + &zfcp_sysfs_ns_port_attrs); + else + retval = sysfs_create_group(&port->sysfs_device.kobj, + &zfcp_sysfs_port_attrs); - if (zfcp_sysfs_port_create_files(&port->sysfs_device, status)) { + if (retval) { device_unregister(&port->sysfs_device); - return NULL; + goto err_out; } zfcp_port_get(port); @@ -1274,15 +722,23 @@ zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn, u32 status, if (!adapter->nameserver_port) adapter->nameserver_port = port; adapter->ports++; + write_unlock_irq(&zfcp_data.config_lock); zfcp_adapter_get(adapter); - return port; + +err_out_free: + kfree(port); +err_out: + return ERR_PTR(-EINVAL); } -void -zfcp_port_dequeue(struct zfcp_port *port) +/** + * zfcp_port_dequeue - dequeues a port from the port list of the adapter + * @port: pointer to struct zfcp_port which should be removed + */ +void zfcp_port_dequeue(struct zfcp_port *port) { zfcp_port_wait(port); write_lock_irq(&zfcp_data.config_lock); @@ -1293,546 +749,53 @@ zfcp_port_dequeue(struct zfcp_port *port) fc_remote_port_delete(port->rport); port->rport = NULL; zfcp_adapter_put(port->adapter); - zfcp_sysfs_port_remove_files(&port->sysfs_device, - atomic_read(&port->status)); - device_unregister(&port->sysfs_device); -} - -/* Enqueues a nameserver port */ -int -zfcp_nameserver_enqueue(struct zfcp_adapter *adapter) -{ - struct zfcp_port *port; - - port = zfcp_port_enqueue(adapter, 0, ZFCP_STATUS_PORT_WKA, - ZFCP_DID_DIRECTORY_SERVICE); - if (!port) { - ZFCP_LOG_INFO("error: enqueue of nameserver port for " - "adapter %s failed\n", - zfcp_get_busid_by_adapter(adapter)); - return -ENXIO; - } - zfcp_port_put(port); - - return 0; -} - -#undef ZFCP_LOG_AREA - -/****************************************************************/ -/******* Fibre Channel Standard related Functions **************/ -/****************************************************************/ - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_FC - -static void zfcp_fsf_incoming_els_rscn(struct zfcp_fsf_req *fsf_req) -{ - struct fsf_status_read_buffer *status_buffer = (void*)fsf_req->data; - struct zfcp_adapter *adapter = fsf_req->adapter; - struct fcp_rscn_head *fcp_rscn_head; - struct fcp_rscn_element *fcp_rscn_element; - struct zfcp_port *port; - u16 i; - u16 no_entries; - u32 range_mask; - unsigned long flags; - - fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload; - fcp_rscn_element = (struct fcp_rscn_element *) status_buffer->payload; - - /* see FC-FS */ - no_entries = (fcp_rscn_head->payload_len / 4); - - for (i = 1; i < no_entries; i++) { - /* skip head and start with 1st element */ - fcp_rscn_element++; - switch (fcp_rscn_element->addr_format) { - case ZFCP_PORT_ADDRESS: - range_mask = ZFCP_PORTS_RANGE_PORT; - break; - case ZFCP_AREA_ADDRESS: - range_mask = ZFCP_PORTS_RANGE_AREA; - break; - case ZFCP_DOMAIN_ADDRESS: - range_mask = ZFCP_PORTS_RANGE_DOMAIN; - break; - case ZFCP_FABRIC_ADDRESS: - range_mask = ZFCP_PORTS_RANGE_FABRIC; - break; - default: - ZFCP_LOG_INFO("incoming RSCN with unknown " - "address format\n"); - continue; - } - read_lock_irqsave(&zfcp_data.config_lock, flags); - list_for_each_entry(port, &adapter->port_list_head, list) { - if (atomic_test_mask - (ZFCP_STATUS_PORT_WKA, &port->status)) - continue; - /* Do we know this port? If not skip it. */ - if (!atomic_test_mask - (ZFCP_STATUS_PORT_DID_DID, &port->status)) { - ZFCP_LOG_INFO("incoming RSCN, trying to open " - "port 0x%016Lx\n", port->wwpn); - zfcp_erp_port_reopen(port, - ZFCP_STATUS_COMMON_ERP_FAILED, - 82, fsf_req); - continue; - } - - /* - * FIXME: race: d_id might being invalidated - * (...DID_DID reset) - */ - if ((port->d_id & range_mask) - == (fcp_rscn_element->nport_did & range_mask)) { - ZFCP_LOG_TRACE("reopen did 0x%08x\n", - fcp_rscn_element->nport_did); - /* - * Unfortunately, an RSCN does not specify the - * type of change a target underwent. We assume - * that it makes sense to reopen the link. - * FIXME: Shall we try to find out more about - * the target and link state before closing it? - * How to accomplish this? (nameserver?) - * Where would such code be put in? - * (inside or outside erp) - */ - ZFCP_LOG_INFO("incoming RSCN, trying to open " - "port 0x%016Lx\n", port->wwpn); - zfcp_test_link(port); - } - } - read_unlock_irqrestore(&zfcp_data.config_lock, flags); - } -} - -static void zfcp_fsf_incoming_els_plogi(struct zfcp_fsf_req *fsf_req) -{ - struct fsf_status_read_buffer *status_buffer = (void*)fsf_req->data; - struct zfcp_adapter *adapter = fsf_req->adapter; - struct fsf_plogi *els_plogi; - struct zfcp_port *port; - unsigned long flags; - - els_plogi = (struct fsf_plogi *) status_buffer->payload; - read_lock_irqsave(&zfcp_data.config_lock, flags); - list_for_each_entry(port, &adapter->port_list_head, list) { - if (port->wwpn == (*(wwn_t *) &els_plogi->serv_param.wwpn)) - break; - } - read_unlock_irqrestore(&zfcp_data.config_lock, flags); - - if (!port || (port->wwpn != (*(wwn_t *) &els_plogi->serv_param.wwpn))) { - ZFCP_LOG_DEBUG("ignored incoming PLOGI for nonexisting port " - "with d_id 0x%06x on adapter %s\n", - status_buffer->d_id, - zfcp_get_busid_by_adapter(adapter)); - } else { - zfcp_erp_port_forced_reopen(port, 0, 83, fsf_req); - } -} - -static void zfcp_fsf_incoming_els_logo(struct zfcp_fsf_req *fsf_req) -{ - struct fsf_status_read_buffer *status_buffer = (void*)fsf_req->data; - struct zfcp_adapter *adapter = fsf_req->adapter; - struct fcp_logo *els_logo = (struct fcp_logo *) status_buffer->payload; - struct zfcp_port *port; - unsigned long flags; - - read_lock_irqsave(&zfcp_data.config_lock, flags); - list_for_each_entry(port, &adapter->port_list_head, list) { - if (port->wwpn == els_logo->nport_wwpn) - break; - } - read_unlock_irqrestore(&zfcp_data.config_lock, flags); - - if (!port || (port->wwpn != els_logo->nport_wwpn)) { - ZFCP_LOG_DEBUG("ignored incoming LOGO for nonexisting port " - "with d_id 0x%06x on adapter %s\n", - status_buffer->d_id, - zfcp_get_busid_by_adapter(adapter)); - } else { - zfcp_erp_port_forced_reopen(port, 0, 84, fsf_req); - } -} - -static void -zfcp_fsf_incoming_els_unknown(struct zfcp_adapter *adapter, - struct fsf_status_read_buffer *status_buffer) -{ - ZFCP_LOG_NORMAL("warning: unknown incoming ELS 0x%08x " - "for adapter %s\n", *(u32 *) (status_buffer->payload), - zfcp_get_busid_by_adapter(adapter)); - -} - -void -zfcp_fsf_incoming_els(struct zfcp_fsf_req *fsf_req) -{ - struct fsf_status_read_buffer *status_buffer; - u32 els_type; - struct zfcp_adapter *adapter; - - status_buffer = (struct fsf_status_read_buffer *) fsf_req->data; - els_type = *(u32 *) (status_buffer->payload); - adapter = fsf_req->adapter; - - zfcp_san_dbf_event_incoming_els(fsf_req); - if (els_type == LS_PLOGI) - zfcp_fsf_incoming_els_plogi(fsf_req); - else if (els_type == LS_LOGO) - zfcp_fsf_incoming_els_logo(fsf_req); - else if ((els_type & 0xffff0000) == LS_RSCN) - /* we are only concerned with the command, not the length */ - zfcp_fsf_incoming_els_rscn(fsf_req); - else - zfcp_fsf_incoming_els_unknown(adapter, status_buffer); -} - - -/** - * zfcp_gid_pn_buffers_alloc - allocate buffers for GID_PN nameserver request - * @gid_pn: pointer to return pointer to struct zfcp_gid_pn_data - * @pool: pointer to mempool_t if non-null memory pool is used for allocation - */ -static int -zfcp_gid_pn_buffers_alloc(struct zfcp_gid_pn_data **gid_pn, mempool_t *pool) -{ - struct zfcp_gid_pn_data *data; - - if (pool != NULL) { - data = mempool_alloc(pool, GFP_ATOMIC); - if (likely(data != NULL)) { - data->ct.pool = pool; - } - } else { - data = kmem_cache_alloc(zfcp_data.gid_pn_cache, GFP_ATOMIC); - } - - if (NULL == data) - return -ENOMEM; - - memset(data, 0, sizeof(*data)); - sg_init_table(&data->req , 1); - sg_init_table(&data->resp , 1); - data->ct.req = &data->req; - data->ct.resp = &data->resp; - data->ct.req_count = data->ct.resp_count = 1; - zfcp_address_to_sg(&data->ct_iu_req, &data->req, sizeof(struct ct_iu_gid_pn_req)); - zfcp_address_to_sg(&data->ct_iu_resp, &data->resp, sizeof(struct ct_iu_gid_pn_resp)); - - *gid_pn = data; - return 0; -} - -/** - * zfcp_gid_pn_buffers_free - free buffers for GID_PN nameserver request - * @gid_pn: pointer to struct zfcp_gid_pn_data which has to be freed - */ -static void zfcp_gid_pn_buffers_free(struct zfcp_gid_pn_data *gid_pn) -{ - if (gid_pn->ct.pool) - mempool_free(gid_pn, gid_pn->ct.pool); + if (atomic_read(&port->status) & ZFCP_STATUS_PORT_WKA) + sysfs_remove_group(&port->sysfs_device.kobj, + &zfcp_sysfs_ns_port_attrs); else - kmem_cache_free(zfcp_data.gid_pn_cache, gid_pn); -} - -/** - * zfcp_ns_gid_pn_request - initiate GID_PN nameserver request - * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed - */ -int -zfcp_ns_gid_pn_request(struct zfcp_erp_action *erp_action) -{ - int ret; - struct ct_iu_gid_pn_req *ct_iu_req; - struct zfcp_gid_pn_data *gid_pn; - struct zfcp_adapter *adapter = erp_action->adapter; - - ret = zfcp_gid_pn_buffers_alloc(&gid_pn, adapter->pool.data_gid_pn); - if (ret < 0) { - ZFCP_LOG_INFO("error: buffer allocation for gid_pn nameserver " - "request failed for adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - goto out; - } - - /* setup nameserver request */ - ct_iu_req = zfcp_sg_to_address(gid_pn->ct.req); - ct_iu_req->header.revision = ZFCP_CT_REVISION; - ct_iu_req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; - ct_iu_req->header.gs_subtype = ZFCP_CT_NAME_SERVER; - ct_iu_req->header.options = ZFCP_CT_SYNCHRONOUS; - ct_iu_req->header.cmd_rsp_code = ZFCP_CT_GID_PN; - ct_iu_req->header.max_res_size = ZFCP_CT_MAX_SIZE; - ct_iu_req->wwpn = erp_action->port->wwpn; - - /* setup parameters for send generic command */ - gid_pn->ct.port = adapter->nameserver_port; - gid_pn->ct.handler = zfcp_ns_gid_pn_handler; - gid_pn->ct.handler_data = (unsigned long) gid_pn; - gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT; - gid_pn->port = erp_action->port; - - ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp, - erp_action); - if (ret) { - ZFCP_LOG_INFO("error: initiation of gid_pn nameserver request " - "failed for adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - - zfcp_gid_pn_buffers_free(gid_pn); - } - - out: - return ret; -} - -/** - * zfcp_ns_gid_pn_handler - handler for GID_PN nameserver request - * @data: unsigned long, contains pointer to struct zfcp_gid_pn_data - */ -static void zfcp_ns_gid_pn_handler(unsigned long data) -{ - struct zfcp_port *port; - struct zfcp_send_ct *ct; - struct ct_iu_gid_pn_req *ct_iu_req; - struct ct_iu_gid_pn_resp *ct_iu_resp; - struct zfcp_gid_pn_data *gid_pn; - - - gid_pn = (struct zfcp_gid_pn_data *) data; - port = gid_pn->port; - ct = &gid_pn->ct; - ct_iu_req = zfcp_sg_to_address(ct->req); - ct_iu_resp = zfcp_sg_to_address(ct->resp); - - if (ct->status != 0) - goto failed; - - if (zfcp_check_ct_response(&ct_iu_resp->header)) { - /* FIXME: do we need some specific erp entry points */ - atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status); - goto failed; - } - /* paranoia */ - if (ct_iu_req->wwpn != port->wwpn) { - ZFCP_LOG_NORMAL("bug: wwpn 0x%016Lx returned by nameserver " - "lookup does not match expected wwpn 0x%016Lx " - "for adapter %s\n", ct_iu_req->wwpn, port->wwpn, - zfcp_get_busid_by_port(port)); - goto mismatch; - } - - /* looks like a valid d_id */ - port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK; - atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status); - ZFCP_LOG_DEBUG("adapter %s: wwpn=0x%016Lx ---> d_id=0x%06x\n", - zfcp_get_busid_by_port(port), port->wwpn, port->d_id); - goto out; - - mismatch: - ZFCP_LOG_DEBUG("CT IUs do not match:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_req, - sizeof(struct ct_iu_gid_pn_req)); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_resp, - sizeof(struct ct_iu_gid_pn_resp)); - - failed: - ZFCP_LOG_NORMAL("warning: failed gid_pn nameserver request for wwpn " - "0x%016Lx for adapter %s\n", - port->wwpn, zfcp_get_busid_by_port(port)); - out: - zfcp_gid_pn_buffers_free(gid_pn); - return; + sysfs_remove_group(&port->sysfs_device.kobj, + &zfcp_sysfs_port_attrs); + device_unregister(&port->sysfs_device); } -/* reject CT_IU reason codes acc. to FC-GS-4 */ -static const struct zfcp_rc_entry zfcp_ct_rc[] = { - {0x01, "invalid command code"}, - {0x02, "invalid version level"}, - {0x03, "logical error"}, - {0x04, "invalid CT_IU size"}, - {0x05, "logical busy"}, - {0x07, "protocol error"}, - {0x09, "unable to perform command request"}, - {0x0b, "command not supported"}, - {0x0d, "server not available"}, - {0x0e, "session could not be established"}, - {0xff, "vendor specific error"}, - {0, NULL}, -}; - -/* LS_RJT reason codes acc. to FC-FS */ -static const struct zfcp_rc_entry zfcp_ls_rjt_rc[] = { - {0x01, "invalid LS_Command code"}, - {0x03, "logical error"}, - {0x05, "logical busy"}, - {0x07, "protocol error"}, - {0x09, "unable to perform command request"}, - {0x0b, "command not supported"}, - {0x0e, "command already in progress"}, - {0xff, "vendor specific error"}, - {0, NULL}, -}; - -/* reject reason codes according to FC-PH/FC-FS */ -static const struct zfcp_rc_entry zfcp_p_rjt_rc[] = { - {0x01, "invalid D_ID"}, - {0x02, "invalid S_ID"}, - {0x03, "Nx_Port not available, temporary"}, - {0x04, "Nx_Port not available, permament"}, - {0x05, "class not supported"}, - {0x06, "delimiter usage error"}, - {0x07, "TYPE not supported"}, - {0x08, "invalid Link_Control"}, - {0x09, "invalid R_CTL field"}, - {0x0a, "invalid F_CTL field"}, - {0x0b, "invalid OX_ID"}, - {0x0c, "invalid RX_ID"}, - {0x0d, "invalid SEQ_ID"}, - {0x0e, "invalid DF_CTL"}, - {0x0f, "invalid SEQ_CNT"}, - {0x10, "invalid parameter field"}, - {0x11, "exchange error"}, - {0x12, "protocol error"}, - {0x13, "incorrect length"}, - {0x14, "unsupported ACK"}, - {0x15, "class of service not supported by entity at FFFFFE"}, - {0x16, "login required"}, - {0x17, "excessive sequences attempted"}, - {0x18, "unable to establish exchange"}, - {0x1a, "fabric path not available"}, - {0x1b, "invalid VC_ID (class 4)"}, - {0x1c, "invalid CS_CTL field"}, - {0x1d, "insufficient resources for VC (class 4)"}, - {0x1f, "invalid class of service"}, - {0x20, "preemption request rejected"}, - {0x21, "preemption not enabled"}, - {0x22, "multicast error"}, - {0x23, "multicast error terminate"}, - {0x24, "process login required"}, - {0xff, "vendor specific reject"}, - {0, NULL}, -}; - /** - * zfcp_rc_description - return description for given reaon code - * @code: reason code - * @rc_table: table of reason codes and descriptions + * zfcp_sg_free_table - free memory used by scatterlists + * @sg: pointer to scatterlist + * @count: number of scatterlist which are to be free'ed + * the scatterlist are expected to reference pages always */ -static const char * -zfcp_rc_description(u8 code, const struct zfcp_rc_entry *rc_table) +void zfcp_sg_free_table(struct scatterlist *sg, int count) { - const char *descr = "unknown reason code"; + int i; - do { - if (code == rc_table->code) { - descr = rc_table->description; + for (i = 0; i < count; i++, sg++) + if (sg) + free_page((unsigned long) sg_virt(sg)); + else break; - } - rc_table++; - } while (rc_table->code && rc_table->description); - - return descr; } /** - * zfcp_check_ct_response - evaluate reason code for CT_IU - * @rjt: response payload to an CT_IU request - * Return: 0 for accept CT_IU, 1 for reject CT_IU or invlid response code + * zfcp_sg_setup_table - init scatterlist and allocate, assign buffers + * @sg: pointer to struct scatterlist + * @count: number of scatterlists which should be assigned with buffers + * of size page + * + * Returns: 0 on success, -ENOMEM otherwise */ -int -zfcp_check_ct_response(struct ct_hdr *rjt) +int zfcp_sg_setup_table(struct scatterlist *sg, int count) { - if (rjt->cmd_rsp_code == ZFCP_CT_ACCEPT) - return 0; + void *addr; + int i; - if (rjt->cmd_rsp_code != ZFCP_CT_REJECT) { - ZFCP_LOG_NORMAL("error: invalid Generic Service command/" - "response code (0x%04hx)\n", - rjt->cmd_rsp_code); - return 1; + sg_init_table(sg, count); + for (i = 0; i < count; i++, sg++) { + addr = (void *) get_zeroed_page(GFP_KERNEL); + if (!addr) { + zfcp_sg_free_table(sg, i); + return -ENOMEM; + } + sg_set_buf(sg, addr, PAGE_SIZE); } - - ZFCP_LOG_INFO("Generic Service command rejected\n"); - ZFCP_LOG_INFO("%s (0x%02x, 0x%02x, 0x%02x)\n", - zfcp_rc_description(rjt->reason_code, zfcp_ct_rc), - (u32) rjt->reason_code, (u32) rjt->reason_code_expl, - (u32) rjt->vendor_unique); - - return 1; -} - -/** - * zfcp_print_els_rjt - print reject parameter and description for ELS reject - * @rjt_par: reject parameter acc. to FC-PH/FC-FS - * @rc_table: table of reason codes and descriptions - */ -static void -zfcp_print_els_rjt(struct zfcp_ls_rjt_par *rjt_par, - const struct zfcp_rc_entry *rc_table) -{ - ZFCP_LOG_INFO("%s (%02x %02x %02x %02x)\n", - zfcp_rc_description(rjt_par->reason_code, rc_table), - (u32) rjt_par->action, (u32) rjt_par->reason_code, - (u32) rjt_par->reason_expl, (u32) rjt_par->vendor_unique); -} - -/** - * zfcp_fsf_handle_els_rjt - evaluate status qualifier/reason code on ELS reject - * @sq: status qualifier word - * @rjt_par: reject parameter as described in FC-PH and FC-FS - * Return: -EROMTEIO for LS_RJT, -EREMCHG for invalid D_ID, -EIO else - */ -int -zfcp_handle_els_rjt(u32 sq, struct zfcp_ls_rjt_par *rjt_par) -{ - int ret = -EIO; - - if (sq == FSF_IOSTAT_NPORT_RJT) { - ZFCP_LOG_INFO("ELS rejected (P_RJT)\n"); - zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc); - /* invalid d_id */ - if (rjt_par->reason_code == 0x01) - ret = -EREMCHG; - } else if (sq == FSF_IOSTAT_FABRIC_RJT) { - ZFCP_LOG_INFO("ELS rejected (F_RJT)\n"); - zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc); - /* invalid d_id */ - if (rjt_par->reason_code == 0x01) - ret = -EREMCHG; - } else if (sq == FSF_IOSTAT_LS_RJT) { - ZFCP_LOG_INFO("ELS rejected (LS_RJT)\n"); - zfcp_print_els_rjt(rjt_par, zfcp_ls_rjt_rc); - ret = -EREMOTEIO; - } else - ZFCP_LOG_INFO("unexpected SQ: 0x%02x\n", sq); - - return ret; -} - -/** - * zfcp_plogi_evaluate - evaluate PLOGI playload and copy important fields - * into zfcp_port structure - * @port: zfcp_port structure - * @plogi: plogi payload - */ -void -zfcp_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi) -{ - port->maxframe_size = plogi->serv_param.common_serv_param[7] | - ((plogi->serv_param.common_serv_param[6] & 0x0F) << 8); - if (plogi->serv_param.class1_serv_param[0] & 0x80) - port->supported_classes |= FC_COS_CLASS1; - if (plogi->serv_param.class2_serv_param[0] & 0x80) - port->supported_classes |= FC_COS_CLASS2; - if (plogi->serv_param.class3_serv_param[0] & 0x80) - port->supported_classes |= FC_COS_CLASS3; - if (plogi->serv_param.class4_serv_param[0] & 0x80) - port->supported_classes |= FC_COS_CLASS4; + return 0; } - -#undef ZFCP_LOG_AREA diff --git a/drivers/s390/scsi/zfcp_ccw.c b/drivers/s390/scsi/zfcp_ccw.c index 66d3b88844b..391dd29749f 100644 --- a/drivers/s390/scsi/zfcp_ccw.c +++ b/drivers/s390/scsi/zfcp_ccw.c @@ -1,64 +1,13 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Registration and callback for the s390 common I/O layer. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ #include "zfcp_ext.h" -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG - -static int zfcp_ccw_probe(struct ccw_device *); -static void zfcp_ccw_remove(struct ccw_device *); -static int zfcp_ccw_set_online(struct ccw_device *); -static int zfcp_ccw_set_offline(struct ccw_device *); -static int zfcp_ccw_notify(struct ccw_device *, int); -static void zfcp_ccw_shutdown(struct ccw_device *); - -static struct ccw_device_id zfcp_ccw_device_id[] = { - {CCW_DEVICE_DEVTYPE(ZFCP_CONTROL_UNIT_TYPE, - ZFCP_CONTROL_UNIT_MODEL, - ZFCP_DEVICE_TYPE, - ZFCP_DEVICE_MODEL)}, - {CCW_DEVICE_DEVTYPE(ZFCP_CONTROL_UNIT_TYPE, - ZFCP_CONTROL_UNIT_MODEL, - ZFCP_DEVICE_TYPE, - ZFCP_DEVICE_MODEL_PRIV)}, - {}, -}; - -static struct ccw_driver zfcp_ccw_driver = { - .owner = THIS_MODULE, - .name = ZFCP_NAME, - .ids = zfcp_ccw_device_id, - .probe = zfcp_ccw_probe, - .remove = zfcp_ccw_remove, - .set_online = zfcp_ccw_set_online, - .set_offline = zfcp_ccw_set_offline, - .notify = zfcp_ccw_notify, - .shutdown = zfcp_ccw_shutdown, - .driver = { - .groups = zfcp_driver_attr_groups, - }, -}; - -MODULE_DEVICE_TABLE(ccw, zfcp_ccw_device_id); - /** * zfcp_ccw_probe - probe function of zfcp driver * @ccw_device: pointer to belonging ccw device @@ -69,19 +18,16 @@ MODULE_DEVICE_TABLE(ccw, zfcp_ccw_device_id); * In addition the nameserver port will be added to the ports of the adapter * and its sysfs representation will be created too. */ -static int -zfcp_ccw_probe(struct ccw_device *ccw_device) +static int zfcp_ccw_probe(struct ccw_device *ccw_device) { - struct zfcp_adapter *adapter; int retval = 0; down(&zfcp_data.config_sema); - adapter = zfcp_adapter_enqueue(ccw_device); - if (!adapter) + if (zfcp_adapter_enqueue(ccw_device)) { + dev_err(&ccw_device->dev, + "Setup of data structures failed.\n"); retval = -EINVAL; - else - ZFCP_LOG_DEBUG("Probed adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); + } up(&zfcp_data.config_sema); return retval; } @@ -95,8 +41,7 @@ zfcp_ccw_probe(struct ccw_device *ccw_device) * ports that belong to this adapter. And in addition all resources of this * adapter will be freed too. */ -static void -zfcp_ccw_remove(struct ccw_device *ccw_device) +static void zfcp_ccw_remove(struct ccw_device *ccw_device) { struct zfcp_adapter *adapter; struct zfcp_port *port, *p; @@ -106,8 +51,6 @@ zfcp_ccw_remove(struct ccw_device *ccw_device) down(&zfcp_data.config_sema); adapter = dev_get_drvdata(&ccw_device->dev); - ZFCP_LOG_DEBUG("Removing adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); write_lock_irq(&zfcp_data.config_lock); list_for_each_entry_safe(port, p, &adapter->port_list_head, list) { list_for_each_entry_safe(unit, u, &port->unit_list_head, list) { @@ -145,8 +88,7 @@ zfcp_ccw_remove(struct ccw_device *ccw_device) * registered with the SCSI stack, that the QDIO queues will be set up * and that the adapter will be opened (asynchronously). */ -static int -zfcp_ccw_set_online(struct ccw_device *ccw_device) +static int zfcp_ccw_set_online(struct ccw_device *ccw_device) { struct zfcp_adapter *adapter; int retval; @@ -155,12 +97,8 @@ zfcp_ccw_set_online(struct ccw_device *ccw_device) adapter = dev_get_drvdata(&ccw_device->dev); retval = zfcp_erp_thread_setup(adapter); - if (retval) { - ZFCP_LOG_INFO("error: start of error recovery thread for " - "adapter %s failed\n", - zfcp_get_busid_by_adapter(adapter)); + if (retval) goto out; - } retval = zfcp_adapter_scsi_register(adapter); if (retval) @@ -191,8 +129,7 @@ zfcp_ccw_set_online(struct ccw_device *ccw_device) * This function gets called by the common i/o layer and sets an adapter * into state offline. */ -static int -zfcp_ccw_set_offline(struct ccw_device *ccw_device) +static int zfcp_ccw_set_offline(struct ccw_device *ccw_device) { struct zfcp_adapter *adapter; @@ -206,15 +143,14 @@ zfcp_ccw_set_offline(struct ccw_device *ccw_device) } /** - * zfcp_ccw_notify + * zfcp_ccw_notify - ccw notify function * @ccw_device: pointer to belonging ccw device * @event: indicates if adapter was detached or attached * * This function gets called by the common i/o layer if an adapter has gone * or reappeared. */ -static int -zfcp_ccw_notify(struct ccw_device *ccw_device, int event) +static int zfcp_ccw_notify(struct ccw_device *ccw_device, int event) { struct zfcp_adapter *adapter; @@ -222,18 +158,15 @@ zfcp_ccw_notify(struct ccw_device *ccw_device, int event) adapter = dev_get_drvdata(&ccw_device->dev); switch (event) { case CIO_GONE: - ZFCP_LOG_NORMAL("adapter %s: device gone\n", - zfcp_get_busid_by_adapter(adapter)); + dev_warn(&adapter->ccw_device->dev, "device gone\n"); zfcp_erp_adapter_shutdown(adapter, 0, 87, NULL); break; case CIO_NO_PATH: - ZFCP_LOG_NORMAL("adapter %s: no path\n", - zfcp_get_busid_by_adapter(adapter)); + dev_warn(&adapter->ccw_device->dev, "no path\n"); zfcp_erp_adapter_shutdown(adapter, 0, 88, NULL); break; case CIO_OPER: - ZFCP_LOG_NORMAL("adapter %s: operational again\n", - zfcp_get_busid_by_adapter(adapter)); + dev_info(&adapter->ccw_device->dev, "operational again\n"); zfcp_erp_modify_adapter_status(adapter, 11, NULL, ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET); @@ -247,24 +180,10 @@ zfcp_ccw_notify(struct ccw_device *ccw_device, int event) } /** - * zfcp_ccw_register - ccw register function - * - * Registers the driver at the common i/o layer. This function will be called - * at module load time/system start. - */ -int __init -zfcp_ccw_register(void) -{ - return ccw_driver_register(&zfcp_ccw_driver); -} - -/** - * zfcp_ccw_shutdown - gets called on reboot/shutdown - * - * Makes sure that QDIO queues are down when the system gets stopped. + * zfcp_ccw_shutdown - handle shutdown from cio + * @cdev: device for adapter to shutdown. */ -static void -zfcp_ccw_shutdown(struct ccw_device *cdev) +static void zfcp_ccw_shutdown(struct ccw_device *cdev) { struct zfcp_adapter *adapter; @@ -275,4 +194,33 @@ zfcp_ccw_shutdown(struct ccw_device *cdev) up(&zfcp_data.config_sema); } -#undef ZFCP_LOG_AREA +static struct ccw_device_id zfcp_ccw_device_id[] = { + { CCW_DEVICE_DEVTYPE(0x1731, 0x3, 0x1732, 0x3) }, + { CCW_DEVICE_DEVTYPE(0x1731, 0x3, 0x1732, 0x4) }, /* priv. */ + {}, +}; + +MODULE_DEVICE_TABLE(ccw, zfcp_ccw_device_id); + +static struct ccw_driver zfcp_ccw_driver = { + .owner = THIS_MODULE, + .name = "zfcp", + .ids = zfcp_ccw_device_id, + .probe = zfcp_ccw_probe, + .remove = zfcp_ccw_remove, + .set_online = zfcp_ccw_set_online, + .set_offline = zfcp_ccw_set_offline, + .notify = zfcp_ccw_notify, + .shutdown = zfcp_ccw_shutdown, +}; + +/** + * zfcp_ccw_register - ccw register function + * + * Registers the driver at the common i/o layer. This function will be called + * at module load time/system start. + */ +int __init zfcp_ccw_register(void) +{ + return ccw_driver_register(&zfcp_ccw_driver); +} diff --git a/drivers/s390/scsi/zfcp_cfdc.c b/drivers/s390/scsi/zfcp_cfdc.c new file mode 100644 index 00000000000..ec2abceca6d --- /dev/null +++ b/drivers/s390/scsi/zfcp_cfdc.c @@ -0,0 +1,259 @@ +/* + * zfcp device driver + * + * Userspace interface for accessing the + * Access Control Lists / Control File Data Channel + * + * Copyright IBM Corporation 2008 + */ + +#include <linux/types.h> +#include <linux/miscdevice.h> +#include <asm/ccwdev.h> +#include "zfcp_def.h" +#include "zfcp_ext.h" +#include "zfcp_fsf.h" + +#define ZFCP_CFDC_CMND_DOWNLOAD_NORMAL 0x00010001 +#define ZFCP_CFDC_CMND_DOWNLOAD_FORCE 0x00010101 +#define ZFCP_CFDC_CMND_FULL_ACCESS 0x00000201 +#define ZFCP_CFDC_CMND_RESTRICTED_ACCESS 0x00000401 +#define ZFCP_CFDC_CMND_UPLOAD 0x00010002 + +#define ZFCP_CFDC_DOWNLOAD 0x00000001 +#define ZFCP_CFDC_UPLOAD 0x00000002 +#define ZFCP_CFDC_WITH_CONTROL_FILE 0x00010000 + +#define ZFCP_CFDC_IOC_MAGIC 0xDD +#define ZFCP_CFDC_IOC \ + _IOWR(ZFCP_CFDC_IOC_MAGIC, 0, struct zfcp_cfdc_data) + +/** + * struct zfcp_cfdc_data - data for ioctl cfdc interface + * @signature: request signature + * @devno: FCP adapter device number + * @command: command code + * @fsf_status: returns status of FSF command to userspace + * @fsf_status_qual: returned to userspace + * @payloads: access conflicts list + * @control_file: access control table + */ +struct zfcp_cfdc_data { + u32 signature; + u32 devno; + u32 command; + u32 fsf_status; + u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE]; + u8 payloads[256]; + u8 control_file[0]; +}; + +static int zfcp_cfdc_copy_from_user(struct scatterlist *sg, + void __user *user_buffer) +{ + unsigned int length; + unsigned int size = ZFCP_CFDC_MAX_SIZE; + + while (size) { + length = min((unsigned int)size, sg->length); + if (copy_from_user(sg_virt(sg++), user_buffer, length)) + return -EFAULT; + user_buffer += length; + size -= length; + } + return 0; +} + +static int zfcp_cfdc_copy_to_user(void __user *user_buffer, + struct scatterlist *sg) +{ + unsigned int length; + unsigned int size = ZFCP_CFDC_MAX_SIZE; + + while (size) { + length = min((unsigned int) size, sg->length); + if (copy_to_user(user_buffer, sg_virt(sg++), length)) + return -EFAULT; + user_buffer += length; + size -= length; + } + return 0; +} + +static struct zfcp_adapter *zfcp_cfdc_get_adapter(u32 devno) +{ + struct zfcp_adapter *adapter = NULL, *cur_adapter; + struct ccw_dev_id dev_id; + + read_lock_irq(&zfcp_data.config_lock); + list_for_each_entry(cur_adapter, &zfcp_data.adapter_list_head, list) { + ccw_device_get_id(cur_adapter->ccw_device, &dev_id); + if (dev_id.devno == devno) { + adapter = cur_adapter; + zfcp_adapter_get(adapter); + break; + } + } + read_unlock_irq(&zfcp_data.config_lock); + return adapter; +} + +static int zfcp_cfdc_set_fsf(struct zfcp_fsf_cfdc *fsf_cfdc, int command) +{ + switch (command) { + case ZFCP_CFDC_CMND_DOWNLOAD_NORMAL: + fsf_cfdc->command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; + fsf_cfdc->option = FSF_CFDC_OPTION_NORMAL_MODE; + break; + case ZFCP_CFDC_CMND_DOWNLOAD_FORCE: + fsf_cfdc->command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; + fsf_cfdc->option = FSF_CFDC_OPTION_FORCE; + break; + case ZFCP_CFDC_CMND_FULL_ACCESS: + fsf_cfdc->command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; + fsf_cfdc->option = FSF_CFDC_OPTION_FULL_ACCESS; + break; + case ZFCP_CFDC_CMND_RESTRICTED_ACCESS: + fsf_cfdc->command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; + fsf_cfdc->option = FSF_CFDC_OPTION_RESTRICTED_ACCESS; + break; + case ZFCP_CFDC_CMND_UPLOAD: + fsf_cfdc->command = FSF_QTCB_UPLOAD_CONTROL_FILE; + fsf_cfdc->option = 0; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int zfcp_cfdc_sg_setup(int command, struct scatterlist *sg, + u8 __user *control_file) +{ + int retval; + retval = zfcp_sg_setup_table(sg, ZFCP_CFDC_PAGES); + if (retval) + return retval; + + sg[ZFCP_CFDC_PAGES - 1].length = ZFCP_CFDC_MAX_SIZE % PAGE_SIZE; + + if (command & ZFCP_CFDC_WITH_CONTROL_FILE && + command & ZFCP_CFDC_DOWNLOAD) { + retval = zfcp_cfdc_copy_from_user(sg, control_file); + if (retval) { + zfcp_sg_free_table(sg, ZFCP_CFDC_PAGES); + return -EFAULT; + } + } + + return 0; +} + +static void zfcp_cfdc_req_to_sense(struct zfcp_cfdc_data *data, + struct zfcp_fsf_req *req) +{ + data->fsf_status = req->qtcb->header.fsf_status; + memcpy(&data->fsf_status_qual, &req->qtcb->header.fsf_status_qual, + sizeof(union fsf_status_qual)); + memcpy(&data->payloads, &req->qtcb->bottom.support.els, + sizeof(req->qtcb->bottom.support.els)); +} + +static long zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command, + unsigned long buffer) +{ + struct zfcp_cfdc_data *data; + struct zfcp_cfdc_data __user *data_user; + struct zfcp_adapter *adapter; + struct zfcp_fsf_req *req; + struct zfcp_fsf_cfdc *fsf_cfdc; + int retval; + + if (command != ZFCP_CFDC_IOC) + return -ENOTTY; + + data_user = (void __user *) buffer; + if (!data_user) + return -EINVAL; + + fsf_cfdc = kmalloc(sizeof(struct zfcp_fsf_cfdc), GFP_KERNEL); + if (!fsf_cfdc) + return -ENOMEM; + + data = kmalloc(sizeof(struct zfcp_cfdc_data), GFP_KERNEL); + if (!data) { + retval = -ENOMEM; + goto no_mem_sense; + } + + retval = copy_from_user(data, data_user, sizeof(*data)); + if (retval) { + retval = -EFAULT; + goto free_buffer; + } + + if (data->signature != 0xCFDCACDF) { + retval = -EINVAL; + goto free_buffer; + } + + retval = zfcp_cfdc_set_fsf(fsf_cfdc, data->command); + + adapter = zfcp_cfdc_get_adapter(data->devno); + if (!adapter) { + retval = -ENXIO; + goto free_buffer; + } + + retval = zfcp_cfdc_sg_setup(data->command, fsf_cfdc->sg, + data_user->control_file); + if (retval) + goto adapter_put; + req = zfcp_fsf_control_file(adapter, fsf_cfdc); + if (IS_ERR(req)) { + retval = PTR_ERR(req); + goto free_sg; + } + + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) { + retval = -ENXIO; + goto free_fsf; + } + + zfcp_cfdc_req_to_sense(data, req); + retval = copy_to_user(data_user, data, sizeof(*data_user)); + if (retval) { + retval = -EFAULT; + goto free_fsf; + } + + if (data->command & ZFCP_CFDC_UPLOAD) + retval = zfcp_cfdc_copy_to_user(&data_user->control_file, + fsf_cfdc->sg); + + free_fsf: + zfcp_fsf_req_free(req); + free_sg: + zfcp_sg_free_table(fsf_cfdc->sg, ZFCP_CFDC_PAGES); + adapter_put: + zfcp_adapter_put(adapter); + free_buffer: + kfree(data); + no_mem_sense: + kfree(fsf_cfdc); + return retval; +} + +static const struct file_operations zfcp_cfdc_fops = { + .unlocked_ioctl = zfcp_cfdc_dev_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = zfcp_cfdc_dev_ioctl +#endif +}; + +struct miscdevice zfcp_cfdc_misc = { + .minor = MISC_DYNAMIC_MINOR, + .name = "zfcp_cfdc", + .fops = &zfcp_cfdc_fops, +}; diff --git a/drivers/s390/scsi/zfcp_dbf.c b/drivers/s390/scsi/zfcp_dbf.c index c8bad675dbd..36169c6944f 100644 --- a/drivers/s390/scsi/zfcp_dbf.c +++ b/drivers/s390/scsi/zfcp_dbf.c @@ -1,22 +1,9 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Debug traces for zfcp. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ #include <linux/ctype.h> @@ -29,8 +16,6 @@ module_param(dbfsize, uint, 0400); MODULE_PARM_DESC(dbfsize, "number of pages for each debug feature area (default 4)"); -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_OTHER - static void zfcp_dbf_hexdump(debug_info_t *dbf, void *to, int to_len, int level, char *from, int from_len) { @@ -186,8 +171,8 @@ void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req) fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE); response->fsf_req_status = fsf_req->status; response->sbal_first = fsf_req->sbal_first; - response->sbal_curr = fsf_req->sbal_curr; response->sbal_last = fsf_req->sbal_last; + response->sbal_response = fsf_req->sbal_response; response->pool = fsf_req->pool != NULL; response->erp_action = (unsigned long)fsf_req->erp_action; @@ -268,7 +253,7 @@ void zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter, strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE); strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE); - rec->u.status.failed = adapter->status_read_failed; + rec->u.status.failed = atomic_read(&adapter->stat_miss); if (status_buffer != NULL) { rec->u.status.status_type = status_buffer->status_type; rec->u.status.status_subtype = status_buffer->status_subtype; @@ -355,8 +340,8 @@ static void zfcp_hba_dbf_view_response(char **p, FSF_STATUS_QUALIFIER_SIZE, 0, FSF_STATUS_QUALIFIER_SIZE); zfcp_dbf_out(p, "fsf_req_status", "0x%08x", r->fsf_req_status); zfcp_dbf_out(p, "sbal_first", "0x%02x", r->sbal_first); - zfcp_dbf_out(p, "sbal_curr", "0x%02x", r->sbal_curr); zfcp_dbf_out(p, "sbal_last", "0x%02x", r->sbal_last); + zfcp_dbf_out(p, "sbal_response", "0x%02x", r->sbal_response); zfcp_dbf_out(p, "pool", "0x%02x", r->pool); switch (r->fsf_command) { @@ -515,13 +500,13 @@ static const char *zfcp_rec_dbf_ids[] = { [52] = "port boxed close unit", [53] = "port boxed fcp", [54] = "unit boxed fcp", - [55] = "port access denied ct", - [56] = "port access denied els", - [57] = "port access denied open port", - [58] = "port access denied close physical", - [59] = "unit access denied open unit", + [55] = "port access denied", + [56] = "", + [57] = "", + [58] = "", + [59] = "unit access denied", [60] = "shared unit access denied open unit", - [61] = "unit access denied fcp", + [61] = "", [62] = "request timeout", [63] = "adisc link test reject or timeout", [64] = "adisc link test d_id changed", @@ -546,8 +531,8 @@ static const char *zfcp_rec_dbf_ids[] = { [80] = "exclusive read-only unit access unsupported", [81] = "shared read-write unit access unsupported", [82] = "incoming rscn", - [83] = "incoming plogi", - [84] = "incoming logo", + [83] = "incoming wwpn", + [84] = "", [85] = "online", [86] = "offline", [87] = "ccw device gone", @@ -586,8 +571,8 @@ static const char *zfcp_rec_dbf_ids[] = { [120] = "unknown fsf command", [121] = "no recommendation for status qualifier", [122] = "status read physical port closed in error", - [123] = "fc service class not supported ct", - [124] = "fc service class not supported els", + [123] = "fc service class not supported", + [124] = "", [125] = "need newer zfcp", [126] = "need newer microcode", [127] = "arbitrated loop not supported", @@ -595,7 +580,7 @@ static const char *zfcp_rec_dbf_ids[] = { [129] = "qtcb size mismatch", [130] = "unknown fsf status ecd", [131] = "fcp request too big", - [132] = "fc service class not supported fcp", + [132] = "", [133] = "data direction not valid fcp", [134] = "command length not valid fcp", [135] = "status read act update", @@ -603,13 +588,18 @@ static const char *zfcp_rec_dbf_ids[] = { [137] = "hbaapi port open", [138] = "hbaapi unit open", [139] = "hbaapi unit shutdown", - [140] = "qdio error", + [140] = "qdio error outbound", [141] = "scsi host reset", [142] = "dismissing fsf request for recovery action", [143] = "recovery action timed out", [144] = "recovery action gone", [145] = "recovery action being processed", [146] = "recovery action ready for next step", + [147] = "qdio error inbound", + [148] = "nameserver needed for port scan", + [149] = "port scan", + [150] = "ptp attach", + [151] = "port validation failed", }; static int zfcp_rec_dbf_view_format(debug_info_t *id, struct debug_view *view, @@ -670,24 +660,20 @@ static struct debug_view zfcp_rec_dbf_view = { * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation * @id2: identifier for event * @adapter: adapter - * @lock: non-zero value indicates that erp_lock has not yet been acquired + * This function assumes that the caller is holding erp_lock. */ -void zfcp_rec_dbf_event_thread(u8 id2, struct zfcp_adapter *adapter, int lock) +void zfcp_rec_dbf_event_thread(u8 id2, struct zfcp_adapter *adapter) { struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf; unsigned long flags = 0; struct list_head *entry; unsigned ready = 0, running = 0, total; - if (lock) - read_lock_irqsave(&adapter->erp_lock, flags); list_for_each(entry, &adapter->erp_ready_head) ready++; list_for_each(entry, &adapter->erp_running_head) running++; total = adapter->erp_total_count; - if (lock) - read_unlock_irqrestore(&adapter->erp_lock, flags); spin_lock_irqsave(&adapter->rec_dbf_lock, flags); memset(r, 0, sizeof(*r)); @@ -696,10 +682,25 @@ void zfcp_rec_dbf_event_thread(u8 id2, struct zfcp_adapter *adapter, int lock) r->u.thread.total = total; r->u.thread.ready = ready; r->u.thread.running = running; - debug_event(adapter->rec_dbf, 5, r, sizeof(*r)); + debug_event(adapter->rec_dbf, 6, r, sizeof(*r)); spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags); } +/** + * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation + * @id2: identifier for event + * @adapter: adapter + * This function assumes that the caller does not hold erp_lock. + */ +void zfcp_rec_dbf_event_thread_lock(u8 id2, struct zfcp_adapter *adapter) +{ + unsigned long flags; + + read_lock_irqsave(&adapter->erp_lock, flags); + zfcp_rec_dbf_event_thread(id2, adapter); + read_unlock_irqrestore(&adapter->erp_lock, flags); +} + static void zfcp_rec_dbf_event_target(u8 id2, void *ref, struct zfcp_adapter *adapter, atomic_t *status, atomic_t *erp_count, @@ -823,7 +824,7 @@ void zfcp_rec_dbf_event_action(u8 id2, struct zfcp_erp_action *erp_action) r->u.action.status = erp_action->status; r->u.action.step = erp_action->step; r->u.action.fsf_req = (unsigned long)erp_action->fsf_req; - debug_event(adapter->rec_dbf, 4, r, sizeof(*r)); + debug_event(adapter->rec_dbf, 5, r, sizeof(*r)); spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags); } @@ -960,7 +961,7 @@ void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req) zfcp_san_dbf_event_els("iels", 1, fsf_req, buf->d_id, fc_host_port_id(adapter->scsi_host), - *(u8 *)buf->payload, (void *)buf->payload, + buf->payload.data[0], (void *)buf->payload.data, length); } @@ -1064,8 +1065,7 @@ static void zfcp_scsi_dbf_event(const char *tag, const char *tag2, int level, if (fsf_req != NULL) { fcp_rsp = (struct fcp_rsp_iu *) &(fsf_req->qtcb->bottom.io.fcp_rsp); - fcp_rsp_info = - zfcp_get_fcp_rsp_info_ptr(fcp_rsp); + fcp_rsp_info = (unsigned char *) &fcp_rsp[1]; fcp_sns_info = zfcp_get_fcp_sns_info_ptr(fcp_rsp); @@ -1279,5 +1279,3 @@ void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter) adapter->hba_dbf = NULL; adapter->rec_dbf = NULL; } - -#undef ZFCP_LOG_AREA diff --git a/drivers/s390/scsi/zfcp_dbf.h b/drivers/s390/scsi/zfcp_dbf.h index 54c34e48345..d04aea60497 100644 --- a/drivers/s390/scsi/zfcp_dbf.h +++ b/drivers/s390/scsi/zfcp_dbf.h @@ -38,7 +38,7 @@ struct zfcp_rec_dbf_record_thread { u32 total; u32 ready; u32 running; -} __attribute__ ((packed)); +}; struct zfcp_rec_dbf_record_target { u64 ref; @@ -47,7 +47,7 @@ struct zfcp_rec_dbf_record_target { u64 wwpn; u64 fcp_lun; u32 erp_count; -} __attribute__ ((packed)); +}; struct zfcp_rec_dbf_record_trigger { u8 want; @@ -59,14 +59,14 @@ struct zfcp_rec_dbf_record_trigger { u64 action; u64 wwpn; u64 fcp_lun; -} __attribute__ ((packed)); +}; struct zfcp_rec_dbf_record_action { u32 status; u32 step; u64 action; u64 fsf_req; -} __attribute__ ((packed)); +}; struct zfcp_rec_dbf_record { u8 id; @@ -77,7 +77,7 @@ struct zfcp_rec_dbf_record { struct zfcp_rec_dbf_record_target target; struct zfcp_rec_dbf_record_trigger trigger; } u; -} __attribute__ ((packed)); +}; enum { ZFCP_REC_DBF_ID_ACTION, @@ -97,8 +97,8 @@ struct zfcp_hba_dbf_record_response { u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE]; u32 fsf_req_status; u8 sbal_first; - u8 sbal_curr; u8 sbal_last; + u8 sbal_response; u8 pool; u64 erp_action; union { diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index bda8c77b22d..67f45fc62f5 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -1,22 +1,9 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Global definitions for the zfcp device driver. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ #ifndef ZFCP_DEF_H @@ -26,7 +13,6 @@ #include <linux/init.h> #include <linux/moduleparam.h> -#include <linux/miscdevice.h> #include <linux/major.h> #include <linux/blkdev.h> #include <linux/delay.h> @@ -53,9 +39,6 @@ /********************* GENERAL DEFINES *********************************/ -/* zfcp version number, it consists of major, minor, and patch-level number */ -#define ZFCP_VERSION "4.8.0" - /** * zfcp_sg_to_address - determine kernel address from struct scatterlist * @list: struct scatterlist @@ -93,11 +76,6 @@ zfcp_address_to_sg(void *address, struct scatterlist *list, unsigned int size) #define ZFCP_DEVICE_MODEL 0x03 #define ZFCP_DEVICE_MODEL_PRIV 0x04 -/* allow as many chained SBALs as are supported by hardware */ -#define ZFCP_MAX_SBALS_PER_REQ FSF_MAX_SBALS_PER_REQ -#define ZFCP_MAX_SBALS_PER_CT_REQ FSF_MAX_SBALS_PER_REQ -#define ZFCP_MAX_SBALS_PER_ELS_REQ FSF_MAX_SBALS_PER_ELS_REQ - /* DMQ bug workaround: don't use last SBALE */ #define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1) @@ -106,42 +84,17 @@ zfcp_address_to_sg(void *address, struct scatterlist *list, unsigned int size) /* max. number of (data buffer) SBALEs in largest SBAL chain */ #define ZFCP_MAX_SBALES_PER_REQ \ - (ZFCP_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2) + (FSF_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2) /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */ #define ZFCP_MAX_SECTORS (ZFCP_MAX_SBALES_PER_REQ * 8) /* max. number of (data buffer) SBALEs in largest SBAL chain multiplied with number of sectors per 4k block */ -/* FIXME(tune): free space should be one max. SBAL chain plus what? */ -#define ZFCP_QDIO_PCI_INTERVAL (QDIO_MAX_BUFFERS_PER_Q \ - - (ZFCP_MAX_SBALS_PER_REQ + 4)) - -#define ZFCP_SBAL_TIMEOUT (5*HZ) - -#define ZFCP_TYPE2_RECOVERY_TIME 8 /* seconds */ - -/* queue polling (values in microseconds) */ -#define ZFCP_MAX_INPUT_THRESHOLD 5000 /* FIXME: tune */ -#define ZFCP_MAX_OUTPUT_THRESHOLD 1000 /* FIXME: tune */ -#define ZFCP_MIN_INPUT_THRESHOLD 1 /* ignored by QDIO layer */ -#define ZFCP_MIN_OUTPUT_THRESHOLD 1 /* ignored by QDIO layer */ - -#define QDIO_SCSI_QFMT 1 /* 1 for FSF */ -#define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer)) - /********************* FSF SPECIFIC DEFINES *********************************/ -#define ZFCP_ULP_INFO_VERSION 26 -#define ZFCP_QTCB_VERSION FSF_QTCB_CURRENT_VERSION /* ATTENTION: value must not be used by hardware */ #define FSF_QTCB_UNSOLICITED_STATUS 0x6305 -#define ZFCP_STATUS_READ_FAILED_THRESHOLD 3 -#define ZFCP_STATUS_READS_RECOM FSF_STATUS_READS_RECOM - -/* Do 1st retry in 1 second, then double the timeout for each following retry */ -#define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP 1 -#define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES 7 /* timeout value for "default timer" for fsf requests */ #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ) @@ -153,17 +106,9 @@ typedef unsigned long long fcp_lun_t; /* data length field may be at variable position in FCP-2 FCP_CMND IU */ typedef unsigned int fcp_dl_t; -#define ZFCP_FC_SERVICE_CLASS_DEFAULT FSF_CLASS_3 - /* timeout for name-server lookup (in seconds) */ #define ZFCP_NS_GID_PN_TIMEOUT 10 -/* largest SCSI command we can process */ -/* FCP-2 (FCP_CMND IU) allows up to (255-3+16) */ -#define ZFCP_MAX_SCSI_CMND_LENGTH 255 -/* maximum number of commands in LUN queue (tagged queueing) */ -#define ZFCP_CMND_PER_LUN 32 - /* task attribute values in FCP-2 FCP_CMND IU */ #define SIMPLE_Q 0 #define HEAD_OF_Q 1 @@ -224,9 +169,9 @@ struct fcp_rsp_iu { #define RSP_CODE_TASKMAN_FAILED 5 /* see fc-fs */ -#define LS_RSCN 0x61040000 -#define LS_LOGO 0x05000000 -#define LS_PLOGI 0x03000000 +#define LS_RSCN 0x61 +#define LS_LOGO 0x05 +#define LS_PLOGI 0x03 struct fcp_rscn_head { u8 command; @@ -266,7 +211,6 @@ struct fcp_logo { * FC-FS stuff */ #define R_A_TOV 10 /* seconds */ -#define ZFCP_ELS_TIMEOUT (2 * R_A_TOV) #define ZFCP_LS_RLS 0x0f #define ZFCP_LS_ADISC 0x52 @@ -311,7 +255,10 @@ struct zfcp_rc_entry { #define ZFCP_CT_DIRECTORY_SERVICE 0xFC #define ZFCP_CT_NAME_SERVER 0x02 #define ZFCP_CT_SYNCHRONOUS 0x00 +#define ZFCP_CT_SCSI_FCP 0x08 +#define ZFCP_CT_UNABLE_TO_PERFORM_CMD 0x09 #define ZFCP_CT_GID_PN 0x0121 +#define ZFCP_CT_GPN_FT 0x0172 #define ZFCP_CT_MAX_SIZE 0x1020 #define ZFCP_CT_ACCEPT 0x8002 #define ZFCP_CT_REJECT 0x8001 @@ -321,107 +268,6 @@ struct zfcp_rc_entry { */ #define ZFCP_CT_TIMEOUT (3 * R_A_TOV) -/******************** LOGGING MACROS AND DEFINES *****************************/ - -/* - * Logging may be applied on certain kinds of driver operations - * independently. Additionally, different log-levels are supported for - * each of these areas. - */ - -#define ZFCP_NAME "zfcp" - -/* independent log areas */ -#define ZFCP_LOG_AREA_OTHER 0 -#define ZFCP_LOG_AREA_SCSI 1 -#define ZFCP_LOG_AREA_FSF 2 -#define ZFCP_LOG_AREA_CONFIG 3 -#define ZFCP_LOG_AREA_CIO 4 -#define ZFCP_LOG_AREA_QDIO 5 -#define ZFCP_LOG_AREA_ERP 6 -#define ZFCP_LOG_AREA_FC 7 - -/* log level values*/ -#define ZFCP_LOG_LEVEL_NORMAL 0 -#define ZFCP_LOG_LEVEL_INFO 1 -#define ZFCP_LOG_LEVEL_DEBUG 2 -#define ZFCP_LOG_LEVEL_TRACE 3 - -/* - * this allows removal of logging code by the preprocessor - * (the most detailed log level still to be compiled in is specified, - * higher log levels are removed) - */ -#define ZFCP_LOG_LEVEL_LIMIT ZFCP_LOG_LEVEL_TRACE - -/* get "loglevel" nibble assignment */ -#define ZFCP_GET_LOG_VALUE(zfcp_lognibble) \ - ((atomic_read(&zfcp_data.loglevel) >> (zfcp_lognibble<<2)) & 0xF) - -/* set "loglevel" nibble */ -#define ZFCP_SET_LOG_NIBBLE(value, zfcp_lognibble) \ - (value << (zfcp_lognibble << 2)) - -/* all log-level defaults are combined to generate initial log-level */ -#define ZFCP_LOG_LEVEL_DEFAULTS \ - (ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_OTHER) | \ - ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_SCSI) | \ - ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FSF) | \ - ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CONFIG) | \ - ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CIO) | \ - ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_QDIO) | \ - ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_ERP) | \ - ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FC)) - -/* check whether we have the right level for logging */ -#define ZFCP_LOG_CHECK(level) \ - ((ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA)) >= level) - -/* logging routine for zfcp */ -#define _ZFCP_LOG(fmt, args...) \ - printk(KERN_ERR ZFCP_NAME": %s(%d): " fmt, __func__, \ - __LINE__ , ##args) - -#define ZFCP_LOG(level, fmt, args...) \ -do { \ - if (ZFCP_LOG_CHECK(level)) \ - _ZFCP_LOG(fmt, ##args); \ -} while (0) - -#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_NORMAL -# define ZFCP_LOG_NORMAL(fmt, args...) do { } while (0) -#else -# define ZFCP_LOG_NORMAL(fmt, args...) \ -do { \ - if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_NORMAL)) \ - printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \ -} while (0) -#endif - -#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_INFO -# define ZFCP_LOG_INFO(fmt, args...) do { } while (0) -#else -# define ZFCP_LOG_INFO(fmt, args...) \ -do { \ - if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_INFO)) \ - printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \ -} while (0) -#endif - -#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_DEBUG -# define ZFCP_LOG_DEBUG(fmt, args...) do { } while (0) -#else -# define ZFCP_LOG_DEBUG(fmt, args...) \ - ZFCP_LOG(ZFCP_LOG_LEVEL_DEBUG, fmt , ##args) -#endif - -#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_TRACE -# define ZFCP_LOG_TRACE(fmt, args...) do { } while (0) -#else -# define ZFCP_LOG_TRACE(fmt, args...) \ - ZFCP_LOG(ZFCP_LOG_LEVEL_TRACE, fmt , ##args) -#endif - /*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/ /* @@ -441,6 +287,7 @@ do { \ #define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000 #define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000 #define ZFCP_STATUS_COMMON_ACCESS_BOXED 0x00400000 +#define ZFCP_STATUS_COMMON_NOESC 0x00200000 /* adapter status */ #define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002 @@ -496,77 +343,6 @@ do { \ #define ZFCP_STATUS_FSFREQ_RETRY 0x00000800 #define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000 -/*********************** ERROR RECOVERY PROCEDURE DEFINES ********************/ - -#define ZFCP_MAX_ERPS 3 - -#define ZFCP_ERP_FSFREQ_TIMEOUT (30 * HZ) -#define ZFCP_ERP_MEMWAIT_TIMEOUT HZ - -#define ZFCP_STATUS_ERP_TIMEDOUT 0x10000000 -#define ZFCP_STATUS_ERP_CLOSE_ONLY 0x01000000 -#define ZFCP_STATUS_ERP_DISMISSING 0x00100000 -#define ZFCP_STATUS_ERP_DISMISSED 0x00200000 -#define ZFCP_STATUS_ERP_LOWMEM 0x00400000 - -#define ZFCP_ERP_STEP_UNINITIALIZED 0x00000000 -#define ZFCP_ERP_STEP_FSF_XCONFIG 0x00000001 -#define ZFCP_ERP_STEP_PHYS_PORT_CLOSING 0x00000010 -#define ZFCP_ERP_STEP_PORT_CLOSING 0x00000100 -#define ZFCP_ERP_STEP_NAMESERVER_OPEN 0x00000200 -#define ZFCP_ERP_STEP_NAMESERVER_LOOKUP 0x00000400 -#define ZFCP_ERP_STEP_PORT_OPENING 0x00000800 -#define ZFCP_ERP_STEP_UNIT_CLOSING 0x00001000 -#define ZFCP_ERP_STEP_UNIT_OPENING 0x00002000 - -/* Ordered by escalation level (necessary for proper erp-code operation) */ -#define ZFCP_ERP_ACTION_REOPEN_ADAPTER 0x4 -#define ZFCP_ERP_ACTION_REOPEN_PORT_FORCED 0x3 -#define ZFCP_ERP_ACTION_REOPEN_PORT 0x2 -#define ZFCP_ERP_ACTION_REOPEN_UNIT 0x1 - -#define ZFCP_ERP_ACTION_RUNNING 0x1 -#define ZFCP_ERP_ACTION_READY 0x2 - -#define ZFCP_ERP_SUCCEEDED 0x0 -#define ZFCP_ERP_FAILED 0x1 -#define ZFCP_ERP_CONTINUES 0x2 -#define ZFCP_ERP_EXIT 0x3 -#define ZFCP_ERP_DISMISSED 0x4 -#define ZFCP_ERP_NOMEM 0x5 - - -/******************** CFDC SPECIFIC STUFF *****************************/ - -/* Firewall data channel sense data record */ -struct zfcp_cfdc_sense_data { - u32 signature; /* Request signature */ - u32 devno; /* FCP adapter device number */ - u32 command; /* Command code */ - u32 fsf_status; /* FSF request status and status qualifier */ - u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE]; - u8 payloads[256]; /* Access conflicts list */ - u8 control_file[0]; /* Access control table */ -}; - -#define ZFCP_CFDC_SIGNATURE 0xCFDCACDF - -#define ZFCP_CFDC_CMND_DOWNLOAD_NORMAL 0x00010001 -#define ZFCP_CFDC_CMND_DOWNLOAD_FORCE 0x00010101 -#define ZFCP_CFDC_CMND_FULL_ACCESS 0x00000201 -#define ZFCP_CFDC_CMND_RESTRICTED_ACCESS 0x00000401 -#define ZFCP_CFDC_CMND_UPLOAD 0x00010002 - -#define ZFCP_CFDC_DOWNLOAD 0x00000001 -#define ZFCP_CFDC_UPLOAD 0x00000002 -#define ZFCP_CFDC_WITH_CONTROL_FILE 0x00010000 - -#define ZFCP_CFDC_DEV_NAME "zfcp_cfdc" -#define ZFCP_CFDC_DEV_MAJOR MISC_MAJOR -#define ZFCP_CFDC_DEV_MINOR MISC_DYNAMIC_MINOR - -#define ZFCP_CFDC_MAX_CONTROL_FILE_SIZE 127 * 1024 - /************************* STRUCTURE DEFINITIONS *****************************/ struct zfcp_fsf_req; @@ -623,7 +399,6 @@ typedef void (*zfcp_send_ct_handler_t)(unsigned long); * @resp_count: number of elements in response scatter-gather list * @handler: handler function (called for response to the request) * @handler_data: data passed to handler function - * @pool: pointer to memory pool for ct request structure * @timeout: FSF timeout for this request * @completion: completion for synchronization purposes * @status: used to pass error status to calling function @@ -636,7 +411,6 @@ struct zfcp_send_ct { unsigned int resp_count; zfcp_send_ct_handler_t handler; unsigned long handler_data; - mempool_t *pool; int timeout; struct completion *completion; int status; @@ -685,13 +459,13 @@ struct zfcp_send_els { }; struct zfcp_qdio_queue { - struct qdio_buffer *buffer[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */ - u8 free_index; /* index of next free bfr + struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */ + u8 first; /* index of next free bfr in queue (free_count>0) */ - atomic_t free_count; /* number of free buffers + atomic_t count; /* number of free buffers in queue */ - rwlock_t queue_lock; /* lock for operations on queue */ - int distance_from_int; /* SBALs used since PCI indication + spinlock_t lock; /* lock for operations on queue */ + int pci_batch; /* SBALs since PCI indication was last set */ }; @@ -708,6 +482,24 @@ struct zfcp_erp_action { struct timer_list timer; }; +struct fsf_latency_record { + u32 min; + u32 max; + u64 sum; +}; + +struct latency_cont { + struct fsf_latency_record channel; + struct fsf_latency_record fabric; + u64 counter; +}; + +struct zfcp_latencies { + struct latency_cont read; + struct latency_cont write; + struct latency_cont cmd; + spinlock_t lock; +}; struct zfcp_adapter { struct list_head list; /* list of adapters */ @@ -723,24 +515,25 @@ struct zfcp_adapter { u32 adapter_features; /* FCP channel features */ u32 connection_features; /* host connection features */ u32 hardware_version; /* of FCP channel */ + u16 timer_ticks; /* time int for a tick */ struct Scsi_Host *scsi_host; /* Pointer to mid-layer */ struct list_head port_list_head; /* remote port list */ struct list_head port_remove_lh; /* head of ports to be removed */ u32 ports; /* number of remote ports */ - atomic_t reqs_active; /* # active FSF reqs */ unsigned long req_no; /* unique FSF req number */ struct list_head *req_list; /* list of pending reqs */ spinlock_t req_list_lock; /* request list lock */ - struct zfcp_qdio_queue request_queue; /* request queue */ + struct zfcp_qdio_queue req_q; /* request queue */ u32 fsf_req_seq_no; /* FSF cmnd seq number */ wait_queue_head_t request_wq; /* can be used to wait for more avaliable SBALs */ - struct zfcp_qdio_queue response_queue; /* response queue */ + struct zfcp_qdio_queue resp_q; /* response queue */ rwlock_t abort_lock; /* Protects against SCSI stack abort/command completion races */ - u16 status_read_failed; /* # failed status reads */ + atomic_t stat_miss; /* # missing status reads*/ + struct work_struct stat_work; atomic_t status; /* status of this adapter */ struct list_head erp_ready_head; /* error recovery for this adapter/devices */ @@ -774,13 +567,9 @@ struct zfcp_adapter { struct fc_host_statistics *fc_stats; struct fsf_qtcb_bottom_port *stats_reset_data; unsigned long stats_reset; + struct work_struct scan_work; }; -/* - * the struct device sysfs_device must be at the beginning of this structure. - * pointer to struct device is used to free port structure in release function - * of the device. don't change! - */ struct zfcp_port { struct device sysfs_device; /* sysfs device */ struct fc_rport *rport; /* rport of fc transport class */ @@ -804,10 +593,6 @@ struct zfcp_port { u32 supported_classes; }; -/* the struct device sysfs_device must be at the beginning of this structure. - * pointer to struct device is used to free unit structure in release function - * of the device. don't change! - */ struct zfcp_unit { struct device sysfs_device; /* sysfs device */ struct list_head list; /* list of logical units */ @@ -822,6 +607,7 @@ struct zfcp_unit { struct scsi_device *device; /* scsi device struct pointer */ struct zfcp_erp_action erp_action; /* pending error recovery */ atomic_t erp_counter; + struct zfcp_latencies latencies; }; /* FSF request */ @@ -831,19 +617,19 @@ struct zfcp_fsf_req { struct zfcp_adapter *adapter; /* adapter request belongs to */ u8 sbal_number; /* nr of SBALs free for use */ u8 sbal_first; /* first SBAL for this request */ - u8 sbal_last; /* last possible SBAL for + u8 sbal_last; /* last SBAL for this request */ + u8 sbal_limit; /* last possible SBAL for this reuest */ - u8 sbal_curr; /* current SBAL during creation - of request */ u8 sbale_curr; /* current SBALE during creation of request */ + u8 sbal_response; /* SBAL used in interrupt */ wait_queue_head_t completion_wq; /* can be used by a routine to wait for completion */ volatile u32 status; /* status of this request */ u32 fsf_command; /* FSF Command copy */ struct fsf_qtcb *qtcb; /* address of associated QTCB */ u32 seq_no; /* Sequence number of request */ - unsigned long data; /* private data of request */ + void *data; /* private data of request */ struct timer_list timer; /* used for erp or scsi er */ struct zfcp_erp_action *erp_action; /* used if this request is issued on behalf of erp */ @@ -851,10 +637,9 @@ struct zfcp_fsf_req { from emergency pool */ unsigned long long issued; /* request sent time (STCK) */ struct zfcp_unit *unit; + void (*handler)(struct zfcp_fsf_req *); }; -typedef void zfcp_fsf_req_handler_t(struct zfcp_fsf_req*); - /* driver data */ struct zfcp_data { struct scsi_host_template scsi_host_template; @@ -873,29 +658,11 @@ struct zfcp_data { char init_busid[BUS_ID_SIZE]; wwn_t init_wwpn; fcp_lun_t init_fcp_lun; - char *driver_version; struct kmem_cache *fsf_req_qtcb_cache; struct kmem_cache *sr_buffer_cache; struct kmem_cache *gid_pn_cache; }; -/** - * struct zfcp_sg_list - struct describing a scatter-gather list - * @sg: pointer to array of (struct scatterlist) - * @count: number of elements in scatter-gather list - */ -struct zfcp_sg_list { - struct scatterlist *sg; - unsigned int count; -}; - -/* number of elements for various memory pools */ -#define ZFCP_POOL_FSF_REQ_ERP_NR 1 -#define ZFCP_POOL_FSF_REQ_SCSI_NR 1 -#define ZFCP_POOL_FSF_REQ_ABORT_NR 1 -#define ZFCP_POOL_STATUS_READ_NR ZFCP_STATUS_READS_RECOM -#define ZFCP_POOL_DATA_GID_PN_NR 1 - /* struct used by memory pools for fsf_requests */ struct zfcp_fsf_req_qtcb { struct zfcp_fsf_req fsf_req; @@ -905,7 +672,6 @@ struct zfcp_fsf_req_qtcb { /********************** ZFCP SPECIFIC DEFINES ********************************/ #define ZFCP_REQ_AUTO_CLEANUP 0x00000002 -#define ZFCP_WAIT_FOR_SBAL 0x00000004 #define ZFCP_REQ_NO_QTCB 0x00000008 #define ZFCP_SET 0x00000100 @@ -916,12 +682,6 @@ struct zfcp_fsf_req_qtcb { ((atomic_read(target) & mask) == mask) #endif -extern void _zfcp_hex_dump(char *, int); -#define ZFCP_HEX_DUMP(level, addr, count) \ - if (ZFCP_LOG_CHECK(level)) { \ - _zfcp_hex_dump(addr, count); \ - } - #define zfcp_get_busid_by_adapter(adapter) (adapter->ccw_device->dev.bus_id) #define zfcp_get_busid_by_port(port) (zfcp_get_busid_by_adapter(port->adapter)) #define zfcp_get_busid_by_unit(unit) (zfcp_get_busid_by_port(unit->port)) @@ -934,15 +694,6 @@ static inline int zfcp_reqlist_hash(unsigned long req_id) return req_id % REQUEST_LIST_SIZE; } -static inline void zfcp_reqlist_add(struct zfcp_adapter *adapter, - struct zfcp_fsf_req *fsf_req) -{ - unsigned int idx; - - idx = zfcp_reqlist_hash(fsf_req->req_id); - list_add_tail(&fsf_req->list, &adapter->req_list[idx]); -} - static inline void zfcp_reqlist_remove(struct zfcp_adapter *adapter, struct zfcp_fsf_req *fsf_req) { diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c index 805484658dd..643ac4bba5b 100644 --- a/drivers/s390/scsi/zfcp_erp.c +++ b/drivers/s390/scsi/zfcp_erp.c @@ -1,641 +1,406 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Error Recovery Procedures (ERP). * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_ERP - #include "zfcp_ext.h" -static int zfcp_erp_adisc(struct zfcp_port *); -static void zfcp_erp_adisc_handler(unsigned long); - -static int zfcp_erp_adapter_reopen_internal(struct zfcp_adapter *, int, u8, - void *); -static int zfcp_erp_port_forced_reopen_internal(struct zfcp_port *, int, u8, - void *); -static int zfcp_erp_port_reopen_internal(struct zfcp_port *, int, u8, void *); -static int zfcp_erp_unit_reopen_internal(struct zfcp_unit *, int, u8, void *); - -static int zfcp_erp_port_reopen_all_internal(struct zfcp_adapter *, int, u8, - void *); -static int zfcp_erp_unit_reopen_all_internal(struct zfcp_port *, int, u8, - void *); - -static void zfcp_erp_adapter_block(struct zfcp_adapter *, int); -static void zfcp_erp_adapter_unblock(struct zfcp_adapter *); -static void zfcp_erp_port_block(struct zfcp_port *, int); -static void zfcp_erp_port_unblock(struct zfcp_port *); -static void zfcp_erp_unit_block(struct zfcp_unit *, int); -static void zfcp_erp_unit_unblock(struct zfcp_unit *); - -static int zfcp_erp_thread(void *); - -static int zfcp_erp_strategy(struct zfcp_erp_action *); - -static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *); -static int zfcp_erp_strategy_memwait(struct zfcp_erp_action *); -static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *, int); -static int zfcp_erp_strategy_check_unit(struct zfcp_unit *, int); -static int zfcp_erp_strategy_check_port(struct zfcp_port *, int); -static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *, int); -static int zfcp_erp_strategy_statechange(int, u32, struct zfcp_adapter *, - struct zfcp_port *, - struct zfcp_unit *, int); -static int zfcp_erp_strategy_statechange_detected(atomic_t *, u32); -static int zfcp_erp_strategy_followup_actions(int, struct zfcp_adapter *, - struct zfcp_port *, - struct zfcp_unit *, int); -static int zfcp_erp_strategy_check_queues(struct zfcp_adapter *); -static int zfcp_erp_strategy_check_action(struct zfcp_erp_action *, int); - -static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *); -static int zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *, int); -static int zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *); -static int zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *); -static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *); -static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *); -static int zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *); -static int zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *); -static int zfcp_erp_adapter_strategy_open_fsf_statusread( - struct zfcp_erp_action *); - -static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *); -static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *); - -static int zfcp_erp_port_strategy(struct zfcp_erp_action *); -static int zfcp_erp_port_strategy_clearstati(struct zfcp_port *); -static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *); -static int zfcp_erp_port_strategy_open(struct zfcp_erp_action *); -static int zfcp_erp_port_strategy_open_nameserver(struct zfcp_erp_action *); -static int zfcp_erp_port_strategy_open_nameserver_wakeup( - struct zfcp_erp_action *); -static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *); -static int zfcp_erp_port_strategy_open_common_lookup(struct zfcp_erp_action *); -static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *); - -static int zfcp_erp_unit_strategy(struct zfcp_erp_action *); -static int zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *); -static int zfcp_erp_unit_strategy_close(struct zfcp_erp_action *); -static int zfcp_erp_unit_strategy_open(struct zfcp_erp_action *); - -static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *); -static void zfcp_erp_action_dismiss_port(struct zfcp_port *); -static void zfcp_erp_action_dismiss_unit(struct zfcp_unit *); -static void zfcp_erp_action_dismiss(struct zfcp_erp_action *); - -static int zfcp_erp_action_enqueue(int, struct zfcp_adapter *, - struct zfcp_port *, struct zfcp_unit *, - u8 id, void *ref); -static int zfcp_erp_action_dequeue(struct zfcp_erp_action *); -static void zfcp_erp_action_cleanup(int, struct zfcp_adapter *, - struct zfcp_port *, struct zfcp_unit *, - int); - -static void zfcp_erp_action_ready(struct zfcp_erp_action *); -static int zfcp_erp_action_exists(struct zfcp_erp_action *); - -static void zfcp_erp_action_to_ready(struct zfcp_erp_action *); -static void zfcp_erp_action_to_running(struct zfcp_erp_action *); - -static void zfcp_erp_memwait_handler(unsigned long); +#define ZFCP_MAX_ERPS 3 -/** - * zfcp_close_qdio - close qdio queues for an adapter - */ -static void zfcp_close_qdio(struct zfcp_adapter *adapter) -{ - struct zfcp_qdio_queue *req_queue; - int first, count; +enum zfcp_erp_act_flags { + ZFCP_STATUS_ERP_TIMEDOUT = 0x10000000, + ZFCP_STATUS_ERP_CLOSE_ONLY = 0x01000000, + ZFCP_STATUS_ERP_DISMISSING = 0x00100000, + ZFCP_STATUS_ERP_DISMISSED = 0x00200000, + ZFCP_STATUS_ERP_LOWMEM = 0x00400000, +}; - if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) - return; +enum zfcp_erp_steps { + ZFCP_ERP_STEP_UNINITIALIZED = 0x0000, + ZFCP_ERP_STEP_FSF_XCONFIG = 0x0001, + ZFCP_ERP_STEP_PHYS_PORT_CLOSING = 0x0010, + ZFCP_ERP_STEP_PORT_CLOSING = 0x0100, + ZFCP_ERP_STEP_NAMESERVER_OPEN = 0x0200, + ZFCP_ERP_STEP_NAMESERVER_LOOKUP = 0x0400, + ZFCP_ERP_STEP_PORT_OPENING = 0x0800, + ZFCP_ERP_STEP_UNIT_CLOSING = 0x1000, + ZFCP_ERP_STEP_UNIT_OPENING = 0x2000, +}; - /* clear QDIOUP flag, thus do_QDIO is not called during qdio_shutdown */ - req_queue = &adapter->request_queue; - write_lock_irq(&req_queue->queue_lock); - atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status); - write_unlock_irq(&req_queue->queue_lock); - - while (qdio_shutdown(adapter->ccw_device, - QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS) - ssleep(1); - - /* cleanup used outbound sbals */ - count = atomic_read(&req_queue->free_count); - if (count < QDIO_MAX_BUFFERS_PER_Q) { - first = (req_queue->free_index+count) % QDIO_MAX_BUFFERS_PER_Q; - count = QDIO_MAX_BUFFERS_PER_Q - count; - zfcp_qdio_zero_sbals(req_queue->buffer, first, count); - } - req_queue->free_index = 0; - atomic_set(&req_queue->free_count, 0); - req_queue->distance_from_int = 0; - adapter->response_queue.free_index = 0; - atomic_set(&adapter->response_queue.free_count, 0); +enum zfcp_erp_act_type { + ZFCP_ERP_ACTION_REOPEN_UNIT = 1, + ZFCP_ERP_ACTION_REOPEN_PORT = 2, + ZFCP_ERP_ACTION_REOPEN_PORT_FORCED = 3, + ZFCP_ERP_ACTION_REOPEN_ADAPTER = 4, +}; + +enum zfcp_erp_act_state { + ZFCP_ERP_ACTION_RUNNING = 1, + ZFCP_ERP_ACTION_READY = 2, +}; + +enum zfcp_erp_act_result { + ZFCP_ERP_SUCCEEDED = 0, + ZFCP_ERP_FAILED = 1, + ZFCP_ERP_CONTINUES = 2, + ZFCP_ERP_EXIT = 3, + ZFCP_ERP_DISMISSED = 4, + ZFCP_ERP_NOMEM = 5, +}; + +static void zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int mask) +{ + zfcp_erp_modify_adapter_status(adapter, 15, NULL, + ZFCP_STATUS_COMMON_UNBLOCKED | mask, + ZFCP_CLEAR); } -/** - * zfcp_close_fsf - stop FSF operations for an adapter - * - * Dismiss and cleanup all pending fsf_reqs (this wakes up all initiators of - * requests waiting for completion; especially this returns SCSI commands - * with error state). - */ -static void zfcp_close_fsf(struct zfcp_adapter *adapter) +static int zfcp_erp_action_exists(struct zfcp_erp_action *act) { - /* close queues to ensure that buffers are not accessed by adapter */ - zfcp_close_qdio(adapter); - zfcp_fsf_req_dismiss_all(adapter); - /* reset FSF request sequence number */ - adapter->fsf_req_seq_no = 0; - /* all ports and units are closed */ - zfcp_erp_modify_adapter_status(adapter, 24, NULL, - ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR); + struct zfcp_erp_action *curr_act; + + list_for_each_entry(curr_act, &act->adapter->erp_running_head, list) + if (act == curr_act) + return ZFCP_ERP_ACTION_RUNNING; + return 0; } -/** - * zfcp_fsf_request_timeout_handler - called if a request timed out - * @data: pointer to adapter for handler function - * - * This function needs to be called if requests (ELS, Generic Service, - * or SCSI commands) exceed a certain time limit. The assumption is - * that after the time limit the adapter get stuck. So we trigger a reopen of - * the adapter. - */ -static void zfcp_fsf_request_timeout_handler(unsigned long data) +static void zfcp_erp_action_ready(struct zfcp_erp_action *act) { - struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; - zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 62, - NULL); + struct zfcp_adapter *adapter = act->adapter; + + list_move(&act->list, &act->adapter->erp_ready_head); + zfcp_rec_dbf_event_action(146, act); + up(&adapter->erp_ready_sem); + zfcp_rec_dbf_event_thread(2, adapter); } -void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req, unsigned long timeout) +static void zfcp_erp_action_dismiss(struct zfcp_erp_action *act) { - fsf_req->timer.function = zfcp_fsf_request_timeout_handler; - fsf_req->timer.data = (unsigned long) fsf_req->adapter; - fsf_req->timer.expires = jiffies + timeout; - add_timer(&fsf_req->timer); + act->status |= ZFCP_STATUS_ERP_DISMISSED; + if (zfcp_erp_action_exists(act) == ZFCP_ERP_ACTION_RUNNING) + zfcp_erp_action_ready(act); } -/* - * function: - * - * purpose: called if an adapter failed, - * initiates adapter recovery which is done - * asynchronously - * - * returns: 0 - initiated action successfully - * <0 - failed to initiate action - */ -static int zfcp_erp_adapter_reopen_internal(struct zfcp_adapter *adapter, - int clear_mask, u8 id, void *ref) +static void zfcp_erp_action_dismiss_unit(struct zfcp_unit *unit) { - int retval; + if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_INUSE) + zfcp_erp_action_dismiss(&unit->erp_action); +} - ZFCP_LOG_DEBUG("reopen adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); +static void zfcp_erp_action_dismiss_port(struct zfcp_port *port) +{ + struct zfcp_unit *unit; - zfcp_erp_adapter_block(adapter, clear_mask); + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_INUSE) + zfcp_erp_action_dismiss(&port->erp_action); + else + list_for_each_entry(unit, &port->unit_list_head, list) + zfcp_erp_action_dismiss_unit(unit); +} - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) { - ZFCP_LOG_DEBUG("skipped reopen of failed adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - /* ensure propagation of failed status to new devices */ - zfcp_erp_adapter_failed(adapter, 13, NULL); - retval = -EIO; - goto out; - } - retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER, - adapter, NULL, NULL, id, ref); +static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter) +{ + struct zfcp_port *port; - out: - return retval; + if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_INUSE) + zfcp_erp_action_dismiss(&adapter->erp_action); + else + list_for_each_entry(port, &adapter->port_list_head, list) + zfcp_erp_action_dismiss_port(port); } -/* - * function: - * - * purpose: Wrappper for zfcp_erp_adapter_reopen_internal - * used to ensure the correct locking - * - * returns: 0 - initiated action successfully - * <0 - failed to initiate action - */ -int zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear_mask, - u8 id, void *ref) +static int zfcp_erp_required_act(int want, struct zfcp_adapter *adapter, + struct zfcp_port *port, + struct zfcp_unit *unit) { - int retval; - unsigned long flags; + int need = want; + int u_status, p_status, a_status; - read_lock_irqsave(&zfcp_data.config_lock, flags); - write_lock(&adapter->erp_lock); - retval = zfcp_erp_adapter_reopen_internal(adapter, clear_mask, id, ref); - write_unlock(&adapter->erp_lock); - read_unlock_irqrestore(&zfcp_data.config_lock, flags); + switch (want) { + case ZFCP_ERP_ACTION_REOPEN_UNIT: + u_status = atomic_read(&unit->status); + if (u_status & ZFCP_STATUS_COMMON_ERP_INUSE) + return 0; + p_status = atomic_read(&port->status); + if (!(p_status & ZFCP_STATUS_COMMON_RUNNING) || + p_status & ZFCP_STATUS_COMMON_ERP_FAILED) + return 0; + if (!(p_status & ZFCP_STATUS_COMMON_UNBLOCKED)) + need = ZFCP_ERP_ACTION_REOPEN_PORT; + /* fall through */ + case ZFCP_ERP_ACTION_REOPEN_PORT: + case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: + p_status = atomic_read(&port->status); + if (p_status & ZFCP_STATUS_COMMON_ERP_INUSE) + return 0; + a_status = atomic_read(&adapter->status); + if (!(a_status & ZFCP_STATUS_COMMON_RUNNING) || + a_status & ZFCP_STATUS_COMMON_ERP_FAILED) + return 0; + if (!(a_status & ZFCP_STATUS_COMMON_UNBLOCKED)) + need = ZFCP_ERP_ACTION_REOPEN_ADAPTER; + /* fall through */ + case ZFCP_ERP_ACTION_REOPEN_ADAPTER: + a_status = atomic_read(&adapter->status); + if (a_status & ZFCP_STATUS_COMMON_ERP_INUSE) + return 0; + } - return retval; + return need; } -int zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear_mask, - u8 id, void *ref) +static struct zfcp_erp_action *zfcp_erp_setup_act(int need, + struct zfcp_adapter *adapter, + struct zfcp_port *port, + struct zfcp_unit *unit) { - int retval; + struct zfcp_erp_action *erp_action; + u32 status = 0; - retval = zfcp_erp_adapter_reopen(adapter, - ZFCP_STATUS_COMMON_RUNNING | - ZFCP_STATUS_COMMON_ERP_FAILED | - clear_mask, id, ref); + switch (need) { + case ZFCP_ERP_ACTION_REOPEN_UNIT: + zfcp_unit_get(unit); + atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status); + erp_action = &unit->erp_action; + if (!(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_RUNNING)) + status = ZFCP_STATUS_ERP_CLOSE_ONLY; + break; - return retval; -} + case ZFCP_ERP_ACTION_REOPEN_PORT: + case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: + zfcp_port_get(port); + zfcp_erp_action_dismiss_port(port); + atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status); + erp_action = &port->erp_action; + if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_RUNNING)) + status = ZFCP_STATUS_ERP_CLOSE_ONLY; + break; -int zfcp_erp_port_shutdown(struct zfcp_port *port, int clear_mask, u8 id, - void *ref) -{ - int retval; + case ZFCP_ERP_ACTION_REOPEN_ADAPTER: + zfcp_adapter_get(adapter); + zfcp_erp_action_dismiss_adapter(adapter); + atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status); + erp_action = &adapter->erp_action; + if (!(atomic_read(&adapter->status) & + ZFCP_STATUS_COMMON_RUNNING)) + status = ZFCP_STATUS_ERP_CLOSE_ONLY; + break; - retval = zfcp_erp_port_reopen(port, - ZFCP_STATUS_COMMON_RUNNING | - ZFCP_STATUS_COMMON_ERP_FAILED | - clear_mask, id, ref); + default: + return NULL; + } - return retval; + memset(erp_action, 0, sizeof(struct zfcp_erp_action)); + erp_action->adapter = adapter; + erp_action->port = port; + erp_action->unit = unit; + erp_action->action = need; + erp_action->status = status; + + return erp_action; } -int zfcp_erp_unit_shutdown(struct zfcp_unit *unit, int clear_mask, u8 id, - void *ref) +static int zfcp_erp_action_enqueue(int want, struct zfcp_adapter *adapter, + struct zfcp_port *port, + struct zfcp_unit *unit, u8 id, void *ref) { - int retval; + int retval = 1, need; + struct zfcp_erp_action *act = NULL; + + if (!(atomic_read(&adapter->status) & + ZFCP_STATUS_ADAPTER_ERP_THREAD_UP)) + return -EIO; - retval = zfcp_erp_unit_reopen(unit, - ZFCP_STATUS_COMMON_RUNNING | - ZFCP_STATUS_COMMON_ERP_FAILED | - clear_mask, id, ref); + need = zfcp_erp_required_act(want, adapter, port, unit); + if (!need) + goto out; + atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status); + act = zfcp_erp_setup_act(need, adapter, port, unit); + if (!act) + goto out; + ++adapter->erp_total_count; + list_add_tail(&act->list, &adapter->erp_ready_head); + up(&adapter->erp_ready_sem); + zfcp_rec_dbf_event_thread(1, adapter); + retval = 0; + out: + zfcp_rec_dbf_event_trigger(id, ref, want, need, act, + adapter, port, unit); return retval; } - -/** - * zfcp_erp_adisc - send ADISC ELS command - * @port: port structure - */ -static int -zfcp_erp_adisc(struct zfcp_port *port) +static int _zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, + int clear_mask, u8 id, void *ref) { - struct zfcp_adapter *adapter = port->adapter; - struct zfcp_send_els *send_els; - struct zfcp_ls_adisc *adisc; - void *address = NULL; - int retval = 0; - - send_els = kzalloc(sizeof(struct zfcp_send_els), GFP_ATOMIC); - if (send_els == NULL) - goto nomem; - - send_els->req = kmalloc(sizeof(struct scatterlist), GFP_ATOMIC); - if (send_els->req == NULL) - goto nomem; - sg_init_table(send_els->req, 1); - - send_els->resp = kmalloc(sizeof(struct scatterlist), GFP_ATOMIC); - if (send_els->resp == NULL) - goto nomem; - sg_init_table(send_els->resp, 1); - - address = (void *) get_zeroed_page(GFP_ATOMIC); - if (address == NULL) - goto nomem; - - zfcp_address_to_sg(address, send_els->req, sizeof(struct zfcp_ls_adisc)); - address += PAGE_SIZE >> 1; - zfcp_address_to_sg(address, send_els->resp, sizeof(struct zfcp_ls_adisc_acc)); - send_els->req_count = send_els->resp_count = 1; - - send_els->adapter = adapter; - send_els->port = port; - send_els->d_id = port->d_id; - send_els->handler = zfcp_erp_adisc_handler; - send_els->handler_data = (unsigned long) send_els; - - adisc = zfcp_sg_to_address(send_els->req); - send_els->ls_code = adisc->code = ZFCP_LS_ADISC; - - /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports - without FC-AL-2 capability, so we don't set it */ - adisc->wwpn = fc_host_port_name(adapter->scsi_host); - adisc->wwnn = fc_host_node_name(adapter->scsi_host); - adisc->nport_id = fc_host_port_id(adapter->scsi_host); - ZFCP_LOG_INFO("ADISC request from s_id 0x%06x to d_id 0x%06x " - "(wwpn=0x%016Lx, wwnn=0x%016Lx, " - "hard_nport_id=0x%06x, nport_id=0x%06x)\n", - adisc->nport_id, send_els->d_id, (wwn_t) adisc->wwpn, - (wwn_t) adisc->wwnn, adisc->hard_nport_id, - adisc->nport_id); - - retval = zfcp_fsf_send_els(send_els); - if (retval != 0) { - ZFCP_LOG_NORMAL("error: initiation of Send ELS failed for port " - "0x%06x on adapter %s\n", send_els->d_id, - zfcp_get_busid_by_adapter(adapter)); - goto freemem; - } + zfcp_erp_adapter_block(adapter, clear_mask); - goto out; - - nomem: - retval = -ENOMEM; - freemem: - if (address != NULL) - __free_pages(sg_page(send_els->req), 0); - if (send_els != NULL) { - kfree(send_els->req); - kfree(send_els->resp); - kfree(send_els); + /* ensure propagation of failed status to new devices */ + if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { + zfcp_erp_adapter_failed(adapter, 13, NULL); + return -EIO; } - out: - return retval; + return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER, + adapter, NULL, NULL, id, ref); } - /** - * zfcp_erp_adisc_handler - handler for ADISC ELS command - * @data: pointer to struct zfcp_send_els - * - * If ADISC failed (LS_RJT or timed out) forced reopen of the port is triggered. + * zfcp_erp_adapter_reopen - Reopen adapter. + * @adapter: Adapter to reopen. + * @clear: Status flags to clear. + * @id: Id for debug trace event. + * @ref: Reference for debug trace event. */ -static void -zfcp_erp_adisc_handler(unsigned long data) +void zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear, + u8 id, void *ref) { - struct zfcp_send_els *send_els; - struct zfcp_port *port; - struct zfcp_adapter *adapter; - u32 d_id; - struct zfcp_ls_adisc_acc *adisc; - - send_els = (struct zfcp_send_els *) data; - adapter = send_els->adapter; - port = send_els->port; - d_id = send_els->d_id; - - /* request rejected or timed out */ - if (send_els->status != 0) { - ZFCP_LOG_NORMAL("ELS request rejected/timed out, " - "force physical port reopen " - "(adapter %s, port d_id=0x%06x)\n", - zfcp_get_busid_by_adapter(adapter), d_id); - if (zfcp_erp_port_forced_reopen(port, 0, 63, NULL)) - ZFCP_LOG_NORMAL("failed reopen of port " - "(adapter %s, wwpn=0x%016Lx)\n", - zfcp_get_busid_by_port(port), - port->wwpn); - goto out; - } - - adisc = zfcp_sg_to_address(send_els->resp); - - ZFCP_LOG_INFO("ADISC response from d_id 0x%06x to s_id " - "0x%06x (wwpn=0x%016Lx, wwnn=0x%016Lx, " - "hard_nport_id=0x%06x, nport_id=0x%06x)\n", - d_id, fc_host_port_id(adapter->scsi_host), - (wwn_t) adisc->wwpn, (wwn_t) adisc->wwnn, - adisc->hard_nport_id, adisc->nport_id); - - /* set wwnn for port */ - if (port->wwnn == 0) - port->wwnn = adisc->wwnn; - - if (port->wwpn != adisc->wwpn) { - ZFCP_LOG_NORMAL("d_id assignment changed, reopening " - "port (adapter %s, wwpn=0x%016Lx, " - "adisc_resp_wwpn=0x%016Lx)\n", - zfcp_get_busid_by_port(port), - port->wwpn, (wwn_t) adisc->wwpn); - if (zfcp_erp_port_reopen(port, 0, 64, NULL)) - ZFCP_LOG_NORMAL("failed reopen of port " - "(adapter %s, wwpn=0x%016Lx)\n", - zfcp_get_busid_by_port(port), - port->wwpn); - } + unsigned long flags; - out: - zfcp_port_put(port); - __free_pages(sg_page(send_els->req), 0); - kfree(send_els->req); - kfree(send_els->resp); - kfree(send_els); + read_lock_irqsave(&zfcp_data.config_lock, flags); + write_lock(&adapter->erp_lock); + _zfcp_erp_adapter_reopen(adapter, clear, id, ref); + write_unlock(&adapter->erp_lock); + read_unlock_irqrestore(&zfcp_data.config_lock, flags); } - /** - * zfcp_test_link - lightweight link test procedure - * @port: port to be tested - * - * Test status of a link to a remote port using the ELS command ADISC. + * zfcp_erp_adapter_shutdown - Shutdown adapter. + * @adapter: Adapter to shut down. + * @clear: Status flags to clear. + * @id: Id for debug trace event. + * @ref: Reference for debug trace event. */ -int -zfcp_test_link(struct zfcp_port *port) +void zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear, + u8 id, void *ref) { - int retval; - - zfcp_port_get(port); - retval = zfcp_erp_adisc(port); - if (retval != 0 && retval != -EBUSY) { - zfcp_port_put(port); - ZFCP_LOG_NORMAL("reopen needed for port 0x%016Lx " - "on adapter %s\n ", port->wwpn, - zfcp_get_busid_by_port(port)); - retval = zfcp_erp_port_forced_reopen(port, 0, 65, NULL); - if (retval != 0) { - ZFCP_LOG_NORMAL("reopen of remote port 0x%016Lx " - "on adapter %s failed\n", port->wwpn, - zfcp_get_busid_by_port(port)); - retval = -EPERM; - } - } - - return retval; + int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; + zfcp_erp_adapter_reopen(adapter, clear | flags, id, ref); } - -/* - * function: - * - * purpose: called if a port failed to be opened normally - * initiates Forced Reopen recovery which is done - * asynchronously - * - * returns: 0 - initiated action successfully - * <0 - failed to initiate action +/** + * zfcp_erp_port_shutdown - Shutdown port + * @port: Port to shut down. + * @clear: Status flags to clear. + * @id: Id for debug trace event. + * @ref: Reference for debug trace event. */ -static int zfcp_erp_port_forced_reopen_internal(struct zfcp_port *port, - int clear_mask, u8 id, - void *ref) +void zfcp_erp_port_shutdown(struct zfcp_port *port, int clear, u8 id, void *ref) { - int retval; + int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; + zfcp_erp_port_reopen(port, clear | flags, id, ref); +} - ZFCP_LOG_DEBUG("forced reopen of port 0x%016Lx on adapter %s\n", - port->wwpn, zfcp_get_busid_by_port(port)); +/** + * zfcp_erp_unit_shutdown - Shutdown unit + * @unit: Unit to shut down. + * @clear: Status flags to clear. + * @id: Id for debug trace event. + * @ref: Reference for debug trace event. + */ +void zfcp_erp_unit_shutdown(struct zfcp_unit *unit, int clear, u8 id, void *ref) +{ + int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; + zfcp_erp_unit_reopen(unit, clear | flags, id, ref); +} - zfcp_erp_port_block(port, clear_mask); +static void zfcp_erp_port_block(struct zfcp_port *port, int clear) +{ + zfcp_erp_modify_port_status(port, 17, NULL, + ZFCP_STATUS_COMMON_UNBLOCKED | clear, + ZFCP_CLEAR); +} - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { - ZFCP_LOG_DEBUG("skipped forced reopen of failed port 0x%016Lx " - "on adapter %s\n", port->wwpn, - zfcp_get_busid_by_port(port)); - retval = -EIO; - goto out; - } +static void _zfcp_erp_port_forced_reopen(struct zfcp_port *port, + int clear, u8 id, void *ref) +{ + zfcp_erp_port_block(port, clear); - retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED, - port->adapter, port, NULL, id, ref); + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) + return; - out: - return retval; + zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED, + port->adapter, port, NULL, id, ref); } -/* - * function: - * - * purpose: Wrappper for zfcp_erp_port_forced_reopen_internal - * used to ensure the correct locking - * - * returns: 0 - initiated action successfully - * <0 - failed to initiate action +/** + * zfcp_erp_port_forced_reopen - Forced close of port and open again + * @port: Port to force close and to reopen. + * @id: Id for debug trace event. + * @ref: Reference for debug trace event. */ -int zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear_mask, u8 id, - void *ref) +void zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear, u8 id, + void *ref) { - int retval; unsigned long flags; - struct zfcp_adapter *adapter; + struct zfcp_adapter *adapter = port->adapter; - adapter = port->adapter; read_lock_irqsave(&zfcp_data.config_lock, flags); write_lock(&adapter->erp_lock); - retval = zfcp_erp_port_forced_reopen_internal(port, clear_mask, id, - ref); + _zfcp_erp_port_forced_reopen(port, clear, id, ref); write_unlock(&adapter->erp_lock); read_unlock_irqrestore(&zfcp_data.config_lock, flags); - - return retval; } -/* - * function: - * - * purpose: called if a port is to be opened - * initiates Reopen recovery which is done - * asynchronously - * - * returns: 0 - initiated action successfully - * <0 - failed to initiate action - */ -static int zfcp_erp_port_reopen_internal(struct zfcp_port *port, int clear_mask, - u8 id, void *ref) +static int _zfcp_erp_port_reopen(struct zfcp_port *port, int clear, u8 id, + void *ref) { - int retval; - - ZFCP_LOG_DEBUG("reopen of port 0x%016Lx on adapter %s\n", - port->wwpn, zfcp_get_busid_by_port(port)); + zfcp_erp_port_block(port, clear); - zfcp_erp_port_block(port, clear_mask); - - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { - ZFCP_LOG_DEBUG("skipped reopen of failed port 0x%016Lx " - "on adapter %s\n", port->wwpn, - zfcp_get_busid_by_port(port)); + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { /* ensure propagation of failed status to new devices */ zfcp_erp_port_failed(port, 14, NULL); - retval = -EIO; - goto out; + return -EIO; } - retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT, - port->adapter, port, NULL, id, ref); - - out: - return retval; + return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT, + port->adapter, port, NULL, id, ref); } /** - * zfcp_erp_port_reopen - initiate reopen of a remote port - * @port: port to be reopened - * @clear_mask: specifies flags in port status to be cleared - * Return: 0 on success, < 0 on error + * zfcp_erp_port_reopen - trigger remote port recovery + * @port: port to recover + * @clear_mask: flags in port status to be cleared * - * This is a wrappper function for zfcp_erp_port_reopen_internal. It ensures - * correct locking. An error recovery task is initiated to do the reopen. - * To wait for the completion of the reopen zfcp_erp_wait should be used. + * Returns 0 if recovery has been triggered, < 0 if not. */ -int zfcp_erp_port_reopen(struct zfcp_port *port, int clear_mask, u8 id, - void *ref) +int zfcp_erp_port_reopen(struct zfcp_port *port, int clear, u8 id, void *ref) { - int retval; unsigned long flags; + int retval; struct zfcp_adapter *adapter = port->adapter; read_lock_irqsave(&zfcp_data.config_lock, flags); write_lock(&adapter->erp_lock); - retval = zfcp_erp_port_reopen_internal(port, clear_mask, id, ref); + retval = _zfcp_erp_port_reopen(port, clear, id, ref); write_unlock(&adapter->erp_lock); read_unlock_irqrestore(&zfcp_data.config_lock, flags); return retval; } -/* - * function: - * - * purpose: called if a unit is to be opened - * initiates Reopen recovery which is done - * asynchronously - * - * returns: 0 - initiated action successfully - * <0 - failed to initiate action - */ -static int zfcp_erp_unit_reopen_internal(struct zfcp_unit *unit, int clear_mask, - u8 id, void *ref) +static void zfcp_erp_unit_block(struct zfcp_unit *unit, int clear_mask) { - int retval; - struct zfcp_adapter *adapter = unit->port->adapter; + zfcp_erp_modify_unit_status(unit, 19, NULL, + ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask, + ZFCP_CLEAR); +} - ZFCP_LOG_DEBUG("reopen of unit 0x%016Lx on port 0x%016Lx " - "on adapter %s\n", unit->fcp_lun, - unit->port->wwpn, zfcp_get_busid_by_unit(unit)); +static void _zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear, u8 id, + void *ref) +{ + struct zfcp_adapter *adapter = unit->port->adapter; - zfcp_erp_unit_block(unit, clear_mask); + zfcp_erp_unit_block(unit, clear); - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status)) { - ZFCP_LOG_DEBUG("skipped reopen of failed unit 0x%016Lx " - "on port 0x%016Lx on adapter %s\n", - unit->fcp_lun, unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - retval = -EIO; - goto out; - } + if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_FAILED) + return; - retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_UNIT, - adapter, unit->port, unit, id, ref); - out: - return retval; + zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_UNIT, + adapter, unit->port, unit, id, ref); } /** @@ -643,987 +408,182 @@ static int zfcp_erp_unit_reopen_internal(struct zfcp_unit *unit, int clear_mask, * @unit: unit to be reopened * @clear_mask: specifies flags in unit status to be cleared * Return: 0 on success, < 0 on error - * - * This is a wrappper for zfcp_erp_unit_reopen_internal. It ensures correct - * locking. An error recovery task is initiated to do the reopen. - * To wait for the completion of the reopen zfcp_erp_wait should be used. */ -int zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear_mask, u8 id, - void *ref) +void zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear, u8 id, void *ref) { - int retval; unsigned long flags; - struct zfcp_adapter *adapter; - struct zfcp_port *port; - - port = unit->port; - adapter = port->adapter; + struct zfcp_port *port = unit->port; + struct zfcp_adapter *adapter = port->adapter; read_lock_irqsave(&zfcp_data.config_lock, flags); write_lock(&adapter->erp_lock); - retval = zfcp_erp_unit_reopen_internal(unit, clear_mask, id, ref); + _zfcp_erp_unit_reopen(unit, clear, id, ref); write_unlock(&adapter->erp_lock); read_unlock_irqrestore(&zfcp_data.config_lock, flags); - - return retval; } -/** - * zfcp_erp_adapter_block - mark adapter as blocked, block scsi requests - */ -static void zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int clear_mask) -{ - zfcp_erp_modify_adapter_status(adapter, 15, NULL, - ZFCP_STATUS_COMMON_UNBLOCKED | - clear_mask, ZFCP_CLEAR); -} - -/* FIXME: isn't really atomic */ -/* - * returns the mask which has not been set so far, i.e. - * 0 if no bit has been changed, !0 if some bit has been changed - */ -static int atomic_test_and_set_mask(unsigned long mask, atomic_t *v) +static int status_change_set(unsigned long mask, atomic_t *status) { - int changed_bits = (atomic_read(v) /*XOR*/^ mask) & mask; - atomic_set_mask(mask, v); - return changed_bits; + return (atomic_read(status) ^ mask) & mask; } -/* FIXME: isn't really atomic */ -/* - * returns the mask which has not been cleared so far, i.e. - * 0 if no bit has been changed, !0 if some bit has been changed - */ -static int atomic_test_and_clear_mask(unsigned long mask, atomic_t *v) +static int status_change_clear(unsigned long mask, atomic_t *status) { - int changed_bits = atomic_read(v) & mask; - atomic_clear_mask(mask, v); - return changed_bits; + return atomic_read(status) & mask; } -/** - * zfcp_erp_adapter_unblock - mark adapter as unblocked, allow scsi requests - */ static void zfcp_erp_adapter_unblock(struct zfcp_adapter *adapter) { - if (atomic_test_and_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, - &adapter->status)) + if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status)) zfcp_rec_dbf_event_adapter(16, NULL, adapter); + atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status); } -/* - * function: - * - * purpose: disable I/O, - * return any open requests and clean them up, - * aim: no pending and incoming I/O - * - * returns: - */ -static void -zfcp_erp_port_block(struct zfcp_port *port, int clear_mask) -{ - zfcp_erp_modify_port_status(port, 17, NULL, - ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask, - ZFCP_CLEAR); -} - -/* - * function: - * - * purpose: enable I/O - * - * returns: - */ -static void -zfcp_erp_port_unblock(struct zfcp_port *port) +static void zfcp_erp_port_unblock(struct zfcp_port *port) { - if (atomic_test_and_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, - &port->status)) + if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status)) zfcp_rec_dbf_event_port(18, NULL, port); + atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status); } -/* - * function: - * - * purpose: disable I/O, - * return any open requests and clean them up, - * aim: no pending and incoming I/O - * - * returns: - */ -static void -zfcp_erp_unit_block(struct zfcp_unit *unit, int clear_mask) -{ - zfcp_erp_modify_unit_status(unit, 19, NULL, - ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask, - ZFCP_CLEAR); -} - -/* - * function: - * - * purpose: enable I/O - * - * returns: - */ -static void -zfcp_erp_unit_unblock(struct zfcp_unit *unit) +static void zfcp_erp_unit_unblock(struct zfcp_unit *unit) { - if (atomic_test_and_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, - &unit->status)) + if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status)) zfcp_rec_dbf_event_unit(20, NULL, unit); + atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status); } -static void -zfcp_erp_action_ready(struct zfcp_erp_action *erp_action) +static void zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action) { - struct zfcp_adapter *adapter = erp_action->adapter; - - zfcp_erp_action_to_ready(erp_action); - up(&adapter->erp_ready_sem); - zfcp_rec_dbf_event_thread(2, adapter, 0); + list_move(&erp_action->list, &erp_action->adapter->erp_running_head); + zfcp_rec_dbf_event_action(145, erp_action); } -/* - * function: - * - * purpose: - * - * returns: <0 erp_action not found in any list - * ZFCP_ERP_ACTION_READY erp_action is in ready list - * ZFCP_ERP_ACTION_RUNNING erp_action is in running list - * - * locks: erp_lock must be held - */ -static int -zfcp_erp_action_exists(struct zfcp_erp_action *erp_action) +static void zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *act) { - int retval = -EINVAL; - struct list_head *entry; - struct zfcp_erp_action *entry_erp_action; - struct zfcp_adapter *adapter = erp_action->adapter; - - /* search in running list */ - list_for_each(entry, &adapter->erp_running_head) { - entry_erp_action = - list_entry(entry, struct zfcp_erp_action, list); - if (entry_erp_action == erp_action) { - retval = ZFCP_ERP_ACTION_RUNNING; - goto out; - } - } - /* search in ready list */ - list_for_each(entry, &adapter->erp_ready_head) { - entry_erp_action = - list_entry(entry, struct zfcp_erp_action, list); - if (entry_erp_action == erp_action) { - retval = ZFCP_ERP_ACTION_READY; - goto out; - } - } + struct zfcp_adapter *adapter = act->adapter; - out: - return retval; -} - -/* - * purpose: checks current status of action (timed out, dismissed, ...) - * and does appropriate preparations (dismiss fsf request, ...) - * - * locks: called under erp_lock (disabled interrupts) - */ -static void -zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *erp_action) -{ - struct zfcp_adapter *adapter = erp_action->adapter; + if (!act->fsf_req) + return; - if (erp_action->fsf_req) { - /* take lock to ensure that request is not deleted meanwhile */ - spin_lock(&adapter->req_list_lock); - if (zfcp_reqlist_find_safe(adapter, erp_action->fsf_req) && - erp_action->fsf_req->erp_action == erp_action) { - /* fsf_req still exists */ - /* dismiss fsf_req of timed out/dismissed erp_action */ - if (erp_action->status & (ZFCP_STATUS_ERP_DISMISSED | - ZFCP_STATUS_ERP_TIMEDOUT)) { - erp_action->fsf_req->status |= - ZFCP_STATUS_FSFREQ_DISMISSED; - zfcp_rec_dbf_event_action(142, erp_action); - } - if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) { - zfcp_rec_dbf_event_action(143, erp_action); - ZFCP_LOG_NORMAL("error: erp step timed out " - "(action=%d, fsf_req=%p)\n ", - erp_action->action, - erp_action->fsf_req); - } - /* - * If fsf_req is neither dismissed nor completed - * then keep it running asynchronously and don't mess - * with the association of erp_action and fsf_req. - */ - if (erp_action->fsf_req->status & - (ZFCP_STATUS_FSFREQ_COMPLETED | - ZFCP_STATUS_FSFREQ_DISMISSED)) { - /* forget about association between fsf_req - and erp_action */ - erp_action->fsf_req = NULL; - } - } else { - /* - * even if this fsf_req has gone, forget about - * association between erp_action and fsf_req - */ - erp_action->fsf_req = NULL; + spin_lock(&adapter->req_list_lock); + if (zfcp_reqlist_find_safe(adapter, act->fsf_req) && + act->fsf_req->erp_action == act) { + if (act->status & (ZFCP_STATUS_ERP_DISMISSED | + ZFCP_STATUS_ERP_TIMEDOUT)) { + act->fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; + zfcp_rec_dbf_event_action(142, act); } - spin_unlock(&adapter->req_list_lock); - } + if (act->status & ZFCP_STATUS_ERP_TIMEDOUT) + zfcp_rec_dbf_event_action(143, act); + if (act->fsf_req->status & (ZFCP_STATUS_FSFREQ_COMPLETED | + ZFCP_STATUS_FSFREQ_DISMISSED)) + act->fsf_req = NULL; + } else + act->fsf_req = NULL; + spin_unlock(&adapter->req_list_lock); } /** - * zfcp_erp_async_handler_nolock - complete erp_action - * - * Used for normal completion, time-out, dismissal and failure after - * low memory condition. + * zfcp_erp_notify - Trigger ERP action. + * @erp_action: ERP action to continue. + * @set_mask: ERP action status flags to set. */ -static void zfcp_erp_async_handler_nolock(struct zfcp_erp_action *erp_action, - unsigned long set_mask) -{ - if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) { - erp_action->status |= set_mask; - zfcp_erp_action_ready(erp_action); - } else { - /* action is ready or gone - nothing to do */ - } -} - -/** - * zfcp_erp_async_handler - wrapper for erp_async_handler_nolock w/ locking - */ -void zfcp_erp_async_handler(struct zfcp_erp_action *erp_action, - unsigned long set_mask) +void zfcp_erp_notify(struct zfcp_erp_action *erp_action, unsigned long set_mask) { struct zfcp_adapter *adapter = erp_action->adapter; unsigned long flags; write_lock_irqsave(&adapter->erp_lock, flags); - zfcp_erp_async_handler_nolock(erp_action, set_mask); - write_unlock_irqrestore(&adapter->erp_lock, flags); -} - -/* - * purpose: is called for erp_action which was slept waiting for - * memory becoming avaliable, - * will trigger that this action will be continued - */ -static void -zfcp_erp_memwait_handler(unsigned long data) -{ - struct zfcp_erp_action *erp_action = (struct zfcp_erp_action *) data; - - zfcp_erp_async_handler(erp_action, 0); -} - -/* - * purpose: is called if an asynchronous erp step timed out, - * action gets an appropriate flag and will be processed - * accordingly - */ -static void zfcp_erp_timeout_handler(unsigned long data) -{ - struct zfcp_erp_action *erp_action = (struct zfcp_erp_action *) data; - - zfcp_erp_async_handler(erp_action, ZFCP_STATUS_ERP_TIMEDOUT); -} - -/** - * zfcp_erp_action_dismiss - dismiss an erp_action - * - * adapter->erp_lock must be held - * - * Dismissal of an erp_action is usually required if an erp_action of - * higher priority is generated. - */ -static void zfcp_erp_action_dismiss(struct zfcp_erp_action *erp_action) -{ - erp_action->status |= ZFCP_STATUS_ERP_DISMISSED; - if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) + if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) { + erp_action->status |= set_mask; zfcp_erp_action_ready(erp_action); -} - -int -zfcp_erp_thread_setup(struct zfcp_adapter *adapter) -{ - int retval = 0; - - atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); - - retval = kernel_thread(zfcp_erp_thread, adapter, SIGCHLD); - if (retval < 0) { - ZFCP_LOG_NORMAL("error: creation of erp thread failed for " - "adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - } else { - wait_event(adapter->erp_thread_wqh, - atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, - &adapter->status)); } - - return (retval < 0); -} - -/* - * function: - * - * purpose: - * - * returns: - * - * context: process (i.e. proc-fs or rmmod/insmod) - * - * note: The caller of this routine ensures that the specified - * adapter has been shut down and that this operation - * has been completed. Thus, there are no pending erp_actions - * which would need to be handled here. - */ -int -zfcp_erp_thread_kill(struct zfcp_adapter *adapter) -{ - int retval = 0; - - atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, &adapter->status); - up(&adapter->erp_ready_sem); - zfcp_rec_dbf_event_thread(2, adapter, 1); - - wait_event(adapter->erp_thread_wqh, - !atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, - &adapter->status)); - - atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, - &adapter->status); - - return retval; -} - -/* - * purpose: is run as a kernel thread, - * goes through list of error recovery actions of associated adapter - * and delegates single action to execution - * - * returns: 0 - */ -static int -zfcp_erp_thread(void *data) -{ - struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; - struct list_head *next; - struct zfcp_erp_action *erp_action; - unsigned long flags; - - daemonize("zfcperp%s", zfcp_get_busid_by_adapter(adapter)); - /* Block all signals */ - siginitsetinv(¤t->blocked, 0); - atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); - wake_up(&adapter->erp_thread_wqh); - - while (!atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, - &adapter->status)) { - - write_lock_irqsave(&adapter->erp_lock, flags); - next = adapter->erp_ready_head.next; - write_unlock_irqrestore(&adapter->erp_lock, flags); - - if (next != &adapter->erp_ready_head) { - erp_action = - list_entry(next, struct zfcp_erp_action, list); - /* - * process action (incl. [re]moving it - * from 'ready' queue) - */ - zfcp_erp_strategy(erp_action); - } - - /* - * sleep as long as there is nothing to do, i.e. - * no action in 'ready' queue to be processed and - * thread is not to be killed - */ - zfcp_rec_dbf_event_thread(4, adapter, 1); - down_interruptible(&adapter->erp_ready_sem); - zfcp_rec_dbf_event_thread(5, adapter, 1); - } - - atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); - wake_up(&adapter->erp_thread_wqh); - - return 0; -} - -/* - * function: - * - * purpose: drives single error recovery action and schedules higher and - * subordinate actions, if necessary - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_SUCCEEDED - action finished successfully (deqd) - * ZFCP_ERP_FAILED - action finished unsuccessfully (deqd) - * ZFCP_ERP_EXIT - action finished (dequeued), offline - * ZFCP_ERP_DISMISSED - action canceled (dequeued) - */ -static int -zfcp_erp_strategy(struct zfcp_erp_action *erp_action) -{ - int retval = 0; - struct zfcp_adapter *adapter = erp_action->adapter; - struct zfcp_port *port = erp_action->port; - struct zfcp_unit *unit = erp_action->unit; - int action = erp_action->action; - u32 status = erp_action->status; - unsigned long flags; - - /* serialise dismissing, timing out, moving, enqueueing */ - read_lock_irqsave(&zfcp_data.config_lock, flags); - write_lock(&adapter->erp_lock); - - /* dequeue dismissed action and leave, if required */ - retval = zfcp_erp_strategy_check_action(erp_action, retval); - if (retval == ZFCP_ERP_DISMISSED) { - goto unlock; - } - - /* - * move action to 'running' queue before processing it - * (to avoid a race condition regarding moving the - * action to the 'running' queue and back) - */ - zfcp_erp_action_to_running(erp_action); - - /* - * try to process action as far as possible, - * no lock to allow for blocking operations (kmalloc, qdio, ...), - * afterwards the lock is required again for the following reasons: - * - dequeueing of finished action and enqueueing of - * follow-up actions must be atomic so that any other - * reopen-routine does not believe there is nothing to do - * and that it is safe to enqueue something else, - * - we want to force any control thread which is dismissing - * actions to finish this before we decide about - * necessary steps to be taken here further - */ - write_unlock(&adapter->erp_lock); - read_unlock_irqrestore(&zfcp_data.config_lock, flags); - retval = zfcp_erp_strategy_do_action(erp_action); - read_lock_irqsave(&zfcp_data.config_lock, flags); - write_lock(&adapter->erp_lock); - - /* - * check for dismissed status again to avoid follow-up actions, - * failing of targets and so on for dismissed actions, - * we go through down() here because there has been an up() - */ - if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) - retval = ZFCP_ERP_CONTINUES; - - switch (retval) { - case ZFCP_ERP_NOMEM: - /* no memory to continue immediately, let it sleep */ - if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) { - ++adapter->erp_low_mem_count; - erp_action->status |= ZFCP_STATUS_ERP_LOWMEM; - } - /* This condition is true if there is no memory available - for any erp_action on this adapter. This implies that there - are no elements in the memory pool(s) left for erp_actions. - This might happen if an erp_action that used a memory pool - element was timed out. - */ - if (adapter->erp_total_count == adapter->erp_low_mem_count) { - ZFCP_LOG_NORMAL("error: no mempool elements available, " - "restarting I/O on adapter %s " - "to free mempool\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_reopen_internal(adapter, 0, 66, NULL); - } else { - retval = zfcp_erp_strategy_memwait(erp_action); - } - goto unlock; - case ZFCP_ERP_CONTINUES: - /* leave since this action runs asynchronously */ - if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { - --adapter->erp_low_mem_count; - erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; - } - goto unlock; - } - /* ok, finished action (whatever its result is) */ - - /* check for unrecoverable targets */ - retval = zfcp_erp_strategy_check_target(erp_action, retval); - - /* action must be dequeued (here to allow for further ones) */ - zfcp_erp_action_dequeue(erp_action); - - /* - * put this target through the erp mill again if someone has - * requested to change the status of a target being online - * to offline or the other way around - * (old retval is preserved if nothing has to be done here) - */ - retval = zfcp_erp_strategy_statechange(action, status, adapter, - port, unit, retval); - - /* - * leave if target is in permanent error state or if - * action is repeated in order to process state change - */ - if (retval == ZFCP_ERP_EXIT) { - goto unlock; - } - - /* trigger follow up actions */ - zfcp_erp_strategy_followup_actions(action, adapter, port, unit, retval); - - unlock: - write_unlock(&adapter->erp_lock); - read_unlock_irqrestore(&zfcp_data.config_lock, flags); - - if (retval != ZFCP_ERP_CONTINUES) - zfcp_erp_action_cleanup(action, adapter, port, unit, retval); - - /* - * a few tasks remain when the erp queues are empty - * (don't do that if the last action evaluated was dismissed - * since this clearly indicates that there is more to come) : - * - close the name server port if it is open yet - * (enqueues another [probably] final action) - * - otherwise, wake up whoever wants to be woken when we are - * done with erp - */ - if (retval != ZFCP_ERP_DISMISSED) - zfcp_erp_strategy_check_queues(adapter); - - return retval; + write_unlock_irqrestore(&adapter->erp_lock, flags); } -/* - * function: - * - * purpose: - * - * returns: ZFCP_ERP_DISMISSED - if action has been dismissed - * retval - otherwise +/** + * zfcp_erp_timeout_handler - Trigger ERP action from timed out ERP request + * @data: ERP action (from timer data) */ -static int -zfcp_erp_strategy_check_action(struct zfcp_erp_action *erp_action, int retval) +void zfcp_erp_timeout_handler(unsigned long data) { - zfcp_erp_strategy_check_fsfreq(erp_action); - - if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) { - zfcp_erp_action_dequeue(erp_action); - retval = ZFCP_ERP_DISMISSED; - } - - return retval; + struct zfcp_erp_action *act = (struct zfcp_erp_action *) data; + zfcp_erp_notify(act, ZFCP_STATUS_ERP_TIMEDOUT); } -static int -zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action) +static void zfcp_erp_memwait_handler(unsigned long data) { - int retval = ZFCP_ERP_FAILED; - - /* - * try to execute/continue action as far as possible, - * note: no lock in subsequent strategy routines - * (this allows these routine to call schedule, e.g. - * kmalloc with such flags or qdio_initialize & friends) - * Note: in case of timeout, the separate strategies will fail - * anyhow. No need for a special action. Even worse, a nameserver - * failure would not wake up waiting ports without the call. - */ - switch (erp_action->action) { - - case ZFCP_ERP_ACTION_REOPEN_ADAPTER: - retval = zfcp_erp_adapter_strategy(erp_action); - break; - - case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: - retval = zfcp_erp_port_forced_strategy(erp_action); - break; - - case ZFCP_ERP_ACTION_REOPEN_PORT: - retval = zfcp_erp_port_strategy(erp_action); - break; - - case ZFCP_ERP_ACTION_REOPEN_UNIT: - retval = zfcp_erp_unit_strategy(erp_action); - break; - - default: - ZFCP_LOG_NORMAL("bug: unknown erp action requested on " - "adapter %s (action=%d)\n", - zfcp_get_busid_by_adapter(erp_action->adapter), - erp_action->action); - } - - return retval; + zfcp_erp_notify((struct zfcp_erp_action *)data, 0); } -/* - * function: - * - * purpose: triggers retry of this action after a certain amount of time - * by means of timer provided by erp_action - * - * returns: ZFCP_ERP_CONTINUES - erp_action sleeps in erp running queue - */ -static int -zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action) +static void zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action) { - int retval = ZFCP_ERP_CONTINUES; - init_timer(&erp_action->timer); erp_action->timer.function = zfcp_erp_memwait_handler; erp_action->timer.data = (unsigned long) erp_action; - erp_action->timer.expires = jiffies + ZFCP_ERP_MEMWAIT_TIMEOUT; + erp_action->timer.expires = jiffies + HZ; add_timer(&erp_action->timer); - - return retval; } -/* - * function: zfcp_erp_adapter_failed - * - * purpose: sets the adapter and all underlying devices to ERP_FAILED - * - */ -void -zfcp_erp_adapter_failed(struct zfcp_adapter *adapter, u8 id, void *ref) -{ - zfcp_erp_modify_adapter_status(adapter, id, ref, - ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); - ZFCP_LOG_NORMAL("adapter erp failed on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); -} - -/* - * function: zfcp_erp_port_failed - * - * purpose: sets the port and all underlying devices to ERP_FAILED - * - */ -void -zfcp_erp_port_failed(struct zfcp_port *port, u8 id, void *ref) -{ - zfcp_erp_modify_port_status(port, id, ref, - ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); - - if (atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status)) - ZFCP_LOG_NORMAL("port erp failed (adapter %s, " - "port d_id=0x%06x)\n", - zfcp_get_busid_by_port(port), port->d_id); - else - ZFCP_LOG_NORMAL("port erp failed (adapter %s, wwpn=0x%016Lx)\n", - zfcp_get_busid_by_port(port), port->wwpn); -} - -/* - * function: zfcp_erp_unit_failed - * - * purpose: sets the unit to ERP_FAILED - * - */ -void -zfcp_erp_unit_failed(struct zfcp_unit *unit, u8 id, void *ref) -{ - zfcp_erp_modify_unit_status(unit, id, ref, - ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); - - ZFCP_LOG_NORMAL("unit erp failed on unit 0x%016Lx on port 0x%016Lx " - " on adapter %s\n", unit->fcp_lun, - unit->port->wwpn, zfcp_get_busid_by_unit(unit)); -} - -/* - * function: zfcp_erp_strategy_check_target - * - * purpose: increments the erp action count on the device currently in - * recovery if the action failed or resets the count in case of - * success. If a maximum count is exceeded the device is marked - * as ERP_FAILED. - * The 'blocked' state of a target which has been recovered - * successfully is reset. - * - * returns: ZFCP_ERP_CONTINUES - action continues (not considered) - * ZFCP_ERP_SUCCEEDED - action finished successfully - * ZFCP_ERP_EXIT - action failed and will not continue - */ -static int -zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action, int result) -{ - struct zfcp_adapter *adapter = erp_action->adapter; - struct zfcp_port *port = erp_action->port; - struct zfcp_unit *unit = erp_action->unit; - - switch (erp_action->action) { - - case ZFCP_ERP_ACTION_REOPEN_UNIT: - result = zfcp_erp_strategy_check_unit(unit, result); - break; - - case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: - case ZFCP_ERP_ACTION_REOPEN_PORT: - result = zfcp_erp_strategy_check_port(port, result); - break; - - case ZFCP_ERP_ACTION_REOPEN_ADAPTER: - result = zfcp_erp_strategy_check_adapter(adapter, result); - break; - } - - return result; -} - -static int -zfcp_erp_strategy_statechange(int action, - u32 status, - struct zfcp_adapter *adapter, - struct zfcp_port *port, - struct zfcp_unit *unit, int retval) -{ - switch (action) { - - case ZFCP_ERP_ACTION_REOPEN_ADAPTER: - if (zfcp_erp_strategy_statechange_detected(&adapter->status, - status)) { - zfcp_erp_adapter_reopen_internal(adapter, - ZFCP_STATUS_COMMON_ERP_FAILED, - 67, NULL); - retval = ZFCP_ERP_EXIT; - } - break; - - case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: - case ZFCP_ERP_ACTION_REOPEN_PORT: - if (zfcp_erp_strategy_statechange_detected(&port->status, - status)) { - zfcp_erp_port_reopen_internal(port, - ZFCP_STATUS_COMMON_ERP_FAILED, - 68, NULL); - retval = ZFCP_ERP_EXIT; - } - break; - - case ZFCP_ERP_ACTION_REOPEN_UNIT: - if (zfcp_erp_strategy_statechange_detected(&unit->status, - status)) { - zfcp_erp_unit_reopen_internal(unit, - ZFCP_STATUS_COMMON_ERP_FAILED, - 69, NULL); - retval = ZFCP_ERP_EXIT; - } - break; - } - - return retval; -} - -static int -zfcp_erp_strategy_statechange_detected(atomic_t * target_status, u32 erp_status) +static void _zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter, + int clear, u8 id, void *ref) { - return - /* take it online */ - (atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, target_status) && - (ZFCP_STATUS_ERP_CLOSE_ONLY & erp_status)) || - /* take it offline */ - (!atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, target_status) && - !(ZFCP_STATUS_ERP_CLOSE_ONLY & erp_status)); -} - -static int -zfcp_erp_strategy_check_unit(struct zfcp_unit *unit, int result) -{ - switch (result) { - case ZFCP_ERP_SUCCEEDED : - atomic_set(&unit->erp_counter, 0); - zfcp_erp_unit_unblock(unit); - break; - case ZFCP_ERP_FAILED : - atomic_inc(&unit->erp_counter); - if (atomic_read(&unit->erp_counter) > ZFCP_MAX_ERPS) - zfcp_erp_unit_failed(unit, 21, NULL); - break; - case ZFCP_ERP_EXIT : - /* nothing */ - break; - } - - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status)) { - zfcp_erp_unit_block(unit, 0); /* for ZFCP_ERP_SUCCEEDED */ - result = ZFCP_ERP_EXIT; - } - - return result; -} - -static int -zfcp_erp_strategy_check_port(struct zfcp_port *port, int result) -{ - switch (result) { - case ZFCP_ERP_SUCCEEDED : - atomic_set(&port->erp_counter, 0); - zfcp_erp_port_unblock(port); - break; - case ZFCP_ERP_FAILED : - atomic_inc(&port->erp_counter); - if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS) - zfcp_erp_port_failed(port, 22, NULL); - break; - case ZFCP_ERP_EXIT : - /* nothing */ - break; - } - - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { - zfcp_erp_port_block(port, 0); /* for ZFCP_ERP_SUCCEEDED */ - result = ZFCP_ERP_EXIT; - } + struct zfcp_port *port; - return result; + list_for_each_entry(port, &adapter->port_list_head, list) + if (!(atomic_read(&port->status) & ZFCP_STATUS_PORT_WKA)) + _zfcp_erp_port_reopen(port, clear, id, ref); } -static int -zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter, int result) +static void _zfcp_erp_unit_reopen_all(struct zfcp_port *port, int clear, u8 id, + void *ref) { - switch (result) { - case ZFCP_ERP_SUCCEEDED : - atomic_set(&adapter->erp_counter, 0); - zfcp_erp_adapter_unblock(adapter); - break; - case ZFCP_ERP_FAILED : - atomic_inc(&adapter->erp_counter); - if (atomic_read(&adapter->erp_counter) > ZFCP_MAX_ERPS) - zfcp_erp_adapter_failed(adapter, 23, NULL); - break; - case ZFCP_ERP_EXIT : - /* nothing */ - break; - } - - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) { - zfcp_erp_adapter_block(adapter, 0); /* for ZFCP_ERP_SUCCEEDED */ - result = ZFCP_ERP_EXIT; - } - - return result; -} - -struct zfcp_erp_add_work { - struct zfcp_unit *unit; - struct work_struct work; -}; + struct zfcp_unit *unit; -/** - * zfcp_erp_scsi_scan - * @data: pointer to a struct zfcp_erp_add_work - * - * Registers a logical unit with the SCSI stack. - */ -static void zfcp_erp_scsi_scan(struct work_struct *work) -{ - struct zfcp_erp_add_work *p = - container_of(work, struct zfcp_erp_add_work, work); - struct zfcp_unit *unit = p->unit; - struct fc_rport *rport = unit->port->rport; - scsi_scan_target(&rport->dev, 0, rport->scsi_target_id, - unit->scsi_lun, 0); - atomic_clear_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status); - zfcp_unit_put(unit); - kfree(p); + list_for_each_entry(unit, &port->unit_list_head, list) + _zfcp_erp_unit_reopen(unit, clear, id, ref); } -/** - * zfcp_erp_schedule_work - * @unit: pointer to unit which should be registered with SCSI stack - * - * Schedules work which registers a unit with the SCSI stack - */ -static void -zfcp_erp_schedule_work(struct zfcp_unit *unit) +static void zfcp_erp_strategy_followup_actions(struct zfcp_erp_action *act) { - struct zfcp_erp_add_work *p; + struct zfcp_adapter *adapter = act->adapter; + struct zfcp_port *port = act->port; + struct zfcp_unit *unit = act->unit; + u32 status = act->status; - p = kzalloc(sizeof(*p), GFP_KERNEL); - if (!p) { - ZFCP_LOG_NORMAL("error: Out of resources. Could not register " - "the FCP-LUN 0x%Lx connected to " - "the port with WWPN 0x%Lx connected to " - "the adapter %s with the SCSI stack.\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - return; - } - - zfcp_unit_get(unit); - atomic_set_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status); - INIT_WORK(&p->work, zfcp_erp_scsi_scan); - p->unit = unit; - schedule_work(&p->work); -} - -/* - * function: - * - * purpose: remaining things in good cases, - * escalation in bad cases - * - * returns: - */ -static int -zfcp_erp_strategy_followup_actions(int action, - struct zfcp_adapter *adapter, - struct zfcp_port *port, - struct zfcp_unit *unit, int status) -{ /* initiate follow-up actions depending on success of finished action */ - switch (action) { + switch (act->action) { case ZFCP_ERP_ACTION_REOPEN_ADAPTER: if (status == ZFCP_ERP_SUCCEEDED) - zfcp_erp_port_reopen_all_internal(adapter, 0, 70, NULL); + _zfcp_erp_port_reopen_all(adapter, 0, 70, NULL); else - zfcp_erp_adapter_reopen_internal(adapter, 0, 71, NULL); + _zfcp_erp_adapter_reopen(adapter, 0, 71, NULL); break; case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: if (status == ZFCP_ERP_SUCCEEDED) - zfcp_erp_port_reopen_internal(port, 0, 72, NULL); + _zfcp_erp_port_reopen(port, 0, 72, NULL); else - zfcp_erp_adapter_reopen_internal(adapter, 0, 73, NULL); + _zfcp_erp_adapter_reopen(adapter, 0, 73, NULL); break; case ZFCP_ERP_ACTION_REOPEN_PORT: if (status == ZFCP_ERP_SUCCEEDED) - zfcp_erp_unit_reopen_all_internal(port, 0, 74, NULL); + _zfcp_erp_unit_reopen_all(port, 0, 74, NULL); else - zfcp_erp_port_forced_reopen_internal(port, 0, 75, NULL); + _zfcp_erp_port_forced_reopen(port, 0, 75, NULL); break; case ZFCP_ERP_ACTION_REOPEN_UNIT: - /* Nothing to do if status == ZFCP_ERP_SUCCEEDED */ if (status != ZFCP_ERP_SUCCEEDED) - zfcp_erp_port_reopen_internal(unit->port, 0, 76, NULL); + _zfcp_erp_port_reopen(unit->port, 0, 76, NULL); break; } - - return 0; } -static int -zfcp_erp_strategy_check_queues(struct zfcp_adapter *adapter) +static void zfcp_erp_wakeup(struct zfcp_adapter *adapter) { unsigned long flags; @@ -1637,1277 +597,622 @@ zfcp_erp_strategy_check_queues(struct zfcp_adapter *adapter) } read_unlock(&adapter->erp_lock); read_unlock_irqrestore(&zfcp_data.config_lock, flags); - - return 0; } -/** - * zfcp_erp_wait - wait for completion of error recovery on an adapter - * @adapter: adapter for which to wait for completion of its error recovery - * Return: 0 - */ -int -zfcp_erp_wait(struct zfcp_adapter *adapter) +static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *act) { - int retval = 0; - - wait_event(adapter->erp_done_wqh, - !atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, - &adapter->status)); - - return retval; + if (zfcp_qdio_open(act->adapter)) + return ZFCP_ERP_FAILED; + init_waitqueue_head(&act->adapter->request_wq); + atomic_set_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &act->adapter->status); + return ZFCP_ERP_SUCCEEDED; } -void zfcp_erp_modify_adapter_status(struct zfcp_adapter *adapter, u8 id, - void *ref, u32 mask, int set_or_clear) +static void zfcp_erp_enqueue_ptp_port(struct zfcp_adapter *adapter) { struct zfcp_port *port; - u32 changed, common_mask = mask & ZFCP_COMMON_FLAGS; - - if (set_or_clear == ZFCP_SET) { - changed = atomic_test_and_set_mask(mask, &adapter->status); - } else { - changed = atomic_test_and_clear_mask(mask, &adapter->status); - if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) - atomic_set(&adapter->erp_counter, 0); - } - if (changed) - zfcp_rec_dbf_event_adapter(id, ref, adapter); - - /* Deal with all underlying devices, only pass common_mask */ - if (common_mask) - list_for_each_entry(port, &adapter->port_list_head, list) - zfcp_erp_modify_port_status(port, id, ref, common_mask, - set_or_clear); + port = zfcp_port_enqueue(adapter, adapter->peer_wwpn, 0, + adapter->peer_d_id); + if (IS_ERR(port)) /* error or port already attached */ + return; + _zfcp_erp_port_reopen(port, 0, 150, NULL); } -/* - * function: zfcp_erp_modify_port_status - * - * purpose: sets the port and all underlying devices to ERP_FAILED - * - */ -void zfcp_erp_modify_port_status(struct zfcp_port *port, u8 id, void *ref, - u32 mask, int set_or_clear) +static int zfcp_erp_adapter_strat_fsf_xconf(struct zfcp_erp_action *erp_action) { - struct zfcp_unit *unit; - u32 changed, common_mask = mask & ZFCP_COMMON_FLAGS; - - if (set_or_clear == ZFCP_SET) { - changed = atomic_test_and_set_mask(mask, &port->status); - } else { - changed = atomic_test_and_clear_mask(mask, &port->status); - if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) - atomic_set(&port->erp_counter, 0); - } - if (changed) - zfcp_rec_dbf_event_port(id, ref, port); - - /* Modify status of all underlying devices, only pass common mask */ - if (common_mask) - list_for_each_entry(unit, &port->unit_list_head, list) - zfcp_erp_modify_unit_status(unit, id, ref, common_mask, - set_or_clear); -} + int retries; + int sleep = 1; + struct zfcp_adapter *adapter = erp_action->adapter; -/* - * function: zfcp_erp_modify_unit_status - * - * purpose: sets the unit to ERP_FAILED - * - */ -void zfcp_erp_modify_unit_status(struct zfcp_unit *unit, u8 id, void *ref, - u32 mask, int set_or_clear) -{ - u32 changed; + atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status); - if (set_or_clear == ZFCP_SET) { - changed = atomic_test_and_set_mask(mask, &unit->status); - } else { - changed = atomic_test_and_clear_mask(mask, &unit->status); - if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) { - atomic_set(&unit->erp_counter, 0); + for (retries = 7; retries; retries--) { + atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, + &adapter->status); + write_lock_irq(&adapter->erp_lock); + zfcp_erp_action_to_running(erp_action); + write_unlock_irq(&adapter->erp_lock); + if (zfcp_fsf_exchange_config_data(erp_action)) { + atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, + &adapter->status); + return ZFCP_ERP_FAILED; } - } - if (changed) - zfcp_rec_dbf_event_unit(id, ref, unit); -} -/* - * function: - * - * purpose: Wrappper for zfcp_erp_port_reopen_all_internal - * used to ensure the correct locking - * - * returns: 0 - initiated action successfully - * <0 - failed to initiate action - */ -int zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter, int clear_mask, - u8 id, void *ref) -{ - int retval; - unsigned long flags; - - read_lock_irqsave(&zfcp_data.config_lock, flags); - write_lock(&adapter->erp_lock); - retval = zfcp_erp_port_reopen_all_internal(adapter, clear_mask, id, - ref); - write_unlock(&adapter->erp_lock); - read_unlock_irqrestore(&zfcp_data.config_lock, flags); - - return retval; -} + zfcp_rec_dbf_event_thread_lock(6, adapter); + down(&adapter->erp_ready_sem); + zfcp_rec_dbf_event_thread_lock(7, adapter); + if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) + break; -static int zfcp_erp_port_reopen_all_internal(struct zfcp_adapter *adapter, - int clear_mask, u8 id, void *ref) -{ - int retval = 0; - struct zfcp_port *port; + if (!(atomic_read(&adapter->status) & + ZFCP_STATUS_ADAPTER_HOST_CON_INIT)) + break; - list_for_each_entry(port, &adapter->port_list_head, list) - if (!atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status)) - zfcp_erp_port_reopen_internal(port, clear_mask, id, - ref); + ssleep(sleep); + sleep *= 2; + } - return retval; -} + atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, + &adapter->status); -/* - * function: - * - * purpose: - * - * returns: FIXME - */ -static int zfcp_erp_unit_reopen_all_internal(struct zfcp_port *port, - int clear_mask, u8 id, void *ref) -{ - int retval = 0; - struct zfcp_unit *unit; + if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_XCONFIG_OK)) + return ZFCP_ERP_FAILED; - list_for_each_entry(unit, &port->unit_list_head, list) - zfcp_erp_unit_reopen_internal(unit, clear_mask, id, ref); + if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) + zfcp_erp_enqueue_ptp_port(adapter); - return retval; + return ZFCP_ERP_SUCCEEDED; } -/* - * function: - * - * purpose: this routine executes the 'Reopen Adapter' action - * (the entire action is processed synchronously, since - * there are no actions which might be run concurrently - * per definition) - * - * returns: ZFCP_ERP_SUCCEEDED - action finished successfully - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_adapter_strategy(struct zfcp_erp_action *erp_action) +static int zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *act) { - int retval; - struct zfcp_adapter *adapter = erp_action->adapter; - - retval = zfcp_erp_adapter_strategy_close(erp_action); - if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) - retval = ZFCP_ERP_EXIT; - else - retval = zfcp_erp_adapter_strategy_open(erp_action); + int ret; + struct zfcp_adapter *adapter = act->adapter; - if (retval == ZFCP_ERP_FAILED) { - ZFCP_LOG_INFO("Waiting to allow the adapter %s " - "to recover itself\n", - zfcp_get_busid_by_adapter(adapter)); - ssleep(ZFCP_TYPE2_RECOVERY_TIME); - } + atomic_clear_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); - return retval; -} + write_lock_irq(&adapter->erp_lock); + zfcp_erp_action_to_running(act); + write_unlock_irq(&adapter->erp_lock); -/* - * function: - * - * purpose: - * - * returns: ZFCP_ERP_SUCCEEDED - action finished successfully - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *erp_action) -{ - int retval; + ret = zfcp_fsf_exchange_port_data(act); + if (ret == -EOPNOTSUPP) + return ZFCP_ERP_SUCCEEDED; + if (ret) + return ZFCP_ERP_FAILED; - atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, - &erp_action->adapter->status); - retval = zfcp_erp_adapter_strategy_generic(erp_action, 1); - atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, - &erp_action->adapter->status); + zfcp_rec_dbf_event_thread_lock(8, adapter); + down(&adapter->erp_ready_sem); + zfcp_rec_dbf_event_thread_lock(9, adapter); + if (act->status & ZFCP_STATUS_ERP_TIMEDOUT) + return ZFCP_ERP_FAILED; - return retval; + return ZFCP_ERP_SUCCEEDED; } -/* - * function: - * - * purpose: - * - * returns: ZFCP_ERP_SUCCEEDED - action finished successfully - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *erp_action) +static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *act) { - int retval; + if (zfcp_erp_adapter_strat_fsf_xconf(act) == ZFCP_ERP_FAILED) + return ZFCP_ERP_FAILED; - atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, - &erp_action->adapter->status); - retval = zfcp_erp_adapter_strategy_generic(erp_action, 0); - atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, - &erp_action->adapter->status); + if (zfcp_erp_adapter_strategy_open_fsf_xport(act) == ZFCP_ERP_FAILED) + return ZFCP_ERP_FAILED; - return retval; + atomic_set(&act->adapter->stat_miss, 16); + if (zfcp_status_read_refill(act->adapter)) + return ZFCP_ERP_FAILED; + + return ZFCP_ERP_SUCCEEDED; } -/* - * function: zfcp_register_adapter - * - * purpose: allocate the irq associated with this devno and register - * the FSF adapter with the SCSI stack - * - * returns: - */ -static int -zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *erp_action, int close) +static int zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *act, + int close) { int retval = ZFCP_ERP_SUCCEEDED; + struct zfcp_adapter *adapter = act->adapter; if (close) goto close_only; - retval = zfcp_erp_adapter_strategy_open_qdio(erp_action); + retval = zfcp_erp_adapter_strategy_open_qdio(act); if (retval != ZFCP_ERP_SUCCEEDED) goto failed_qdio; - retval = zfcp_erp_adapter_strategy_open_fsf(erp_action); + retval = zfcp_erp_adapter_strategy_open_fsf(act); if (retval != ZFCP_ERP_SUCCEEDED) goto failed_openfcp; - atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &erp_action->adapter->status); - goto out; + atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &act->adapter->status); + schedule_work(&act->adapter->scan_work); + + return ZFCP_ERP_SUCCEEDED; close_only: atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, - &erp_action->adapter->status); + &act->adapter->status); failed_openfcp: - zfcp_close_fsf(erp_action->adapter); + /* close queues to ensure that buffers are not accessed by adapter */ + zfcp_qdio_close(adapter); + zfcp_fsf_req_dismiss_all(adapter); + adapter->fsf_req_seq_no = 0; + /* all ports and units are closed */ + zfcp_erp_modify_adapter_status(adapter, 24, NULL, + ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR); failed_qdio: atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | ZFCP_STATUS_ADAPTER_XPORT_OK, - &erp_action->adapter->status); - out: + &act->adapter->status); return retval; } -/* - * function: zfcp_qdio_init - * - * purpose: setup QDIO operation for specified adapter - * - * returns: 0 - successful setup - * !0 - failed setup - */ -static int -zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *erp_action) +static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *act) { int retval; - int i; - volatile struct qdio_buffer_element *sbale; - struct zfcp_adapter *adapter = erp_action->adapter; - - if (atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { - ZFCP_LOG_NORMAL("bug: second attempt to set up QDIO on " - "adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - goto failed_sanity; - } - - if (qdio_establish(&adapter->qdio_init_data) != 0) { - ZFCP_LOG_INFO("error: establishment of QDIO queues failed " - "on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - goto failed_qdio_establish; - } - - if (qdio_activate(adapter->ccw_device, 0) != 0) { - ZFCP_LOG_INFO("error: activation of QDIO queues failed " - "on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - goto failed_qdio_activate; - } - - /* - * put buffers into response queue, - */ - for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) { - sbale = &(adapter->response_queue.buffer[i]->element[0]); - sbale->length = 0; - sbale->flags = SBAL_FLAGS_LAST_ENTRY; - sbale->addr = NULL; - } - - ZFCP_LOG_TRACE("calling do_QDIO on adapter %s (flags=0x%x, " - "queue_no=%i, index_in_queue=%i, count=%i)\n", - zfcp_get_busid_by_adapter(adapter), - QDIO_FLAG_SYNC_INPUT, 0, 0, QDIO_MAX_BUFFERS_PER_Q); - - retval = do_QDIO(adapter->ccw_device, - QDIO_FLAG_SYNC_INPUT, - 0, 0, QDIO_MAX_BUFFERS_PER_Q, NULL); - - if (retval) { - ZFCP_LOG_NORMAL("bug: setup of QDIO failed (retval=%d)\n", - retval); - goto failed_do_qdio; - } else { - adapter->response_queue.free_index = 0; - atomic_set(&adapter->response_queue.free_count, 0); - ZFCP_LOG_DEBUG("%i buffers successfully enqueued to " - "response queue\n", QDIO_MAX_BUFFERS_PER_Q); - } - /* set index of first avalable SBALS / number of available SBALS */ - adapter->request_queue.free_index = 0; - atomic_set(&adapter->request_queue.free_count, QDIO_MAX_BUFFERS_PER_Q); - adapter->request_queue.distance_from_int = 0; - - /* initialize waitqueue used to wait for free SBALs in requests queue */ - init_waitqueue_head(&adapter->request_wq); - /* ok, we did it - skip all cleanups for different failures */ - atomic_set_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status); - retval = ZFCP_ERP_SUCCEEDED; - goto out; + atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &act->adapter->status); + zfcp_erp_adapter_strategy_generic(act, 1); /* close */ + atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &act->adapter->status); + if (act->status & ZFCP_STATUS_ERP_CLOSE_ONLY) + return ZFCP_ERP_EXIT; - failed_do_qdio: - /* NOP */ + atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &act->adapter->status); + retval = zfcp_erp_adapter_strategy_generic(act, 0); /* open */ + atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &act->adapter->status); - failed_qdio_activate: - while (qdio_shutdown(adapter->ccw_device, - QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS) - ssleep(1); - - failed_qdio_establish: - failed_sanity: - retval = ZFCP_ERP_FAILED; + if (retval == ZFCP_ERP_FAILED) + ssleep(8); - out: return retval; } - -static int -zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *erp_action) +static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *act) { int retval; - retval = zfcp_erp_adapter_strategy_open_fsf_xconfig(erp_action); - if (retval == ZFCP_ERP_FAILED) + retval = zfcp_fsf_close_physical_port(act); + if (retval == -ENOMEM) + return ZFCP_ERP_NOMEM; + act->step = ZFCP_ERP_STEP_PHYS_PORT_CLOSING; + if (retval) return ZFCP_ERP_FAILED; - retval = zfcp_erp_adapter_strategy_open_fsf_xport(erp_action); - if (retval == ZFCP_ERP_FAILED) - return ZFCP_ERP_FAILED; - - return zfcp_erp_adapter_strategy_open_fsf_statusread(erp_action); + return ZFCP_ERP_CONTINUES; } -static int -zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *erp_action) +static void zfcp_erp_port_strategy_clearstati(struct zfcp_port *port) { - int retval = ZFCP_ERP_SUCCEEDED; - int retries; - int sleep = ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP; - struct zfcp_adapter *adapter = erp_action->adapter; - - atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status); - - for (retries = ZFCP_EXCHANGE_CONFIG_DATA_RETRIES; retries; retries--) { - atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, - &adapter->status); - ZFCP_LOG_DEBUG("Doing exchange config data\n"); - write_lock_irq(&adapter->erp_lock); - zfcp_erp_action_to_running(erp_action); - write_unlock_irq(&adapter->erp_lock); - if (zfcp_fsf_exchange_config_data(erp_action)) { - retval = ZFCP_ERP_FAILED; - ZFCP_LOG_INFO("error: initiation of exchange of " - "configuration data failed for " - "adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - break; - } - ZFCP_LOG_DEBUG("Xchange underway\n"); - - /* - * Why this works: - * Both the normal completion handler as well as the timeout - * handler will do an 'up' when the 'exchange config data' - * request completes or times out. Thus, the signal to go on - * won't be lost utilizing this semaphore. - * Furthermore, this 'adapter_reopen' action is - * guaranteed to be the only action being there (highest action - * which prevents other actions from being created). - * Resulting from that, the wake signal recognized here - * _must_ be the one belonging to the 'exchange config - * data' request. - */ - zfcp_rec_dbf_event_thread(6, adapter, 1); - down(&adapter->erp_ready_sem); - zfcp_rec_dbf_event_thread(7, adapter, 1); - if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) { - ZFCP_LOG_INFO("error: exchange of configuration data " - "for adapter %s timed out\n", - zfcp_get_busid_by_adapter(adapter)); - break; - } - - if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, - &adapter->status)) - break; + atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING | + ZFCP_STATUS_COMMON_CLOSING | + ZFCP_STATUS_COMMON_ACCESS_DENIED | + ZFCP_STATUS_PORT_DID_DID | + ZFCP_STATUS_PORT_PHYS_CLOSING | + ZFCP_STATUS_PORT_INVALID_WWPN, + &port->status); +} - ZFCP_LOG_DEBUG("host connection still initialising... " - "waiting and retrying...\n"); - /* sleep a little bit before retry */ - ssleep(sleep); - sleep *= 2; - } +static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action) +{ + struct zfcp_port *port = erp_action->port; + int status = atomic_read(&port->status); - atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, - &adapter->status); + switch (erp_action->step) { + case ZFCP_ERP_STEP_UNINITIALIZED: + zfcp_erp_port_strategy_clearstati(port); + if ((status & ZFCP_STATUS_PORT_PHYS_OPEN) && + (status & ZFCP_STATUS_COMMON_OPEN)) + return zfcp_erp_port_forced_strategy_close(erp_action); + else + return ZFCP_ERP_FAILED; - if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, - &adapter->status)) { - ZFCP_LOG_INFO("error: exchange of configuration data for " - "adapter %s failed\n", - zfcp_get_busid_by_adapter(adapter)); - retval = ZFCP_ERP_FAILED; + case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: + if (status & ZFCP_STATUS_PORT_PHYS_OPEN) + return ZFCP_ERP_SUCCEEDED; } - - return retval; + return ZFCP_ERP_FAILED; } -static int -zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *erp_action) +static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action) { - int ret; - struct zfcp_adapter *adapter; - - adapter = erp_action->adapter; - atomic_clear_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); - - write_lock_irq(&adapter->erp_lock); - zfcp_erp_action_to_running(erp_action); - write_unlock_irq(&adapter->erp_lock); + int retval; - ret = zfcp_fsf_exchange_port_data(erp_action); - if (ret == -EOPNOTSUPP) { - return ZFCP_ERP_SUCCEEDED; - } else if (ret) { + retval = zfcp_fsf_close_port(erp_action); + if (retval == -ENOMEM) + return ZFCP_ERP_NOMEM; + erp_action->step = ZFCP_ERP_STEP_PORT_CLOSING; + if (retval) return ZFCP_ERP_FAILED; - } - - ret = ZFCP_ERP_SUCCEEDED; - zfcp_rec_dbf_event_thread(8, adapter, 1); - down(&adapter->erp_ready_sem); - zfcp_rec_dbf_event_thread(9, adapter, 1); - if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) { - ZFCP_LOG_INFO("error: exchange port data timed out (adapter " - "%s)\n", zfcp_get_busid_by_adapter(adapter)); - ret = ZFCP_ERP_FAILED; - } - - /* don't treat as error for the sake of compatibility */ - if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status)) - ZFCP_LOG_INFO("warning: exchange port data failed (adapter " - "%s\n", zfcp_get_busid_by_adapter(adapter)); - - return ret; + return ZFCP_ERP_CONTINUES; } -static int -zfcp_erp_adapter_strategy_open_fsf_statusread(struct zfcp_erp_action - *erp_action) +static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action) { - int retval = ZFCP_ERP_SUCCEEDED; - int temp_ret; - struct zfcp_adapter *adapter = erp_action->adapter; - int i; - - adapter->status_read_failed = 0; - for (i = 0; i < ZFCP_STATUS_READS_RECOM; i++) { - temp_ret = zfcp_fsf_status_read(adapter, ZFCP_WAIT_FOR_SBAL); - if (temp_ret < 0) { - ZFCP_LOG_INFO("error: set-up of unsolicited status " - "notification failed on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - retval = ZFCP_ERP_FAILED; - i--; - break; - } - } + int retval; - return retval; + retval = zfcp_fsf_open_port(erp_action); + if (retval == -ENOMEM) + return ZFCP_ERP_NOMEM; + erp_action->step = ZFCP_ERP_STEP_PORT_OPENING; + if (retval) + return ZFCP_ERP_FAILED; + return ZFCP_ERP_CONTINUES; } -/* - * function: - * - * purpose: this routine executes the 'Reopen Physical Port' action - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_SUCCEEDED - action finished successfully - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action) +static void zfcp_erp_port_strategy_open_ns_wake(struct zfcp_erp_action *ns_act) { - int retval = ZFCP_ERP_FAILED; - struct zfcp_port *port = erp_action->port; - - switch (erp_action->step) { - - /* - * FIXME: - * the ULP spec. begs for waiting for oustanding commands - */ - case ZFCP_ERP_STEP_UNINITIALIZED: - zfcp_erp_port_strategy_clearstati(port); - /* - * it would be sufficient to test only the normal open flag - * since the phys. open flag cannot be set if the normal - * open flag is unset - however, this is for readabilty ... - */ - if (atomic_test_mask((ZFCP_STATUS_PORT_PHYS_OPEN | - ZFCP_STATUS_COMMON_OPEN), - &port->status)) { - ZFCP_LOG_DEBUG("port 0x%016Lx is open -> trying " - "close physical\n", port->wwpn); - retval = - zfcp_erp_port_forced_strategy_close(erp_action); - } else - retval = ZFCP_ERP_FAILED; - break; + unsigned long flags; + struct zfcp_adapter *adapter = ns_act->adapter; + struct zfcp_erp_action *act, *tmp; + int status; - case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: - if (atomic_test_mask(ZFCP_STATUS_PORT_PHYS_OPEN, - &port->status)) { - ZFCP_LOG_DEBUG("close physical failed for port " - "0x%016Lx\n", port->wwpn); - retval = ZFCP_ERP_FAILED; - } else - retval = ZFCP_ERP_SUCCEEDED; - break; + read_lock_irqsave(&adapter->erp_lock, flags); + list_for_each_entry_safe(act, tmp, &adapter->erp_running_head, list) { + if (act->step == ZFCP_ERP_STEP_NAMESERVER_OPEN) { + status = atomic_read(&adapter->nameserver_port->status); + if (status & ZFCP_STATUS_COMMON_ERP_FAILED) + zfcp_erp_port_failed(act->port, 27, NULL); + zfcp_erp_action_ready(act); + } } - - return retval; + read_unlock_irqrestore(&adapter->erp_lock, flags); } -/* - * function: - * - * purpose: this routine executes the 'Reopen Port' action - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_SUCCEEDED - action finished successfully - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action) +static int zfcp_erp_port_strategy_open_nameserver(struct zfcp_erp_action *act) { - int retval = ZFCP_ERP_FAILED; - struct zfcp_port *port = erp_action->port; - - switch (erp_action->step) { + int retval; - /* - * FIXME: - * the ULP spec. begs for waiting for oustanding commands - */ + switch (act->step) { case ZFCP_ERP_STEP_UNINITIALIZED: - zfcp_erp_port_strategy_clearstati(port); - if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) { - ZFCP_LOG_DEBUG("port 0x%016Lx is open -> trying " - "close\n", port->wwpn); - retval = zfcp_erp_port_strategy_close(erp_action); - goto out; - } /* else it's already closed, open it */ - break; - + case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: case ZFCP_ERP_STEP_PORT_CLOSING: - if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) { - ZFCP_LOG_DEBUG("close failed for port 0x%016Lx\n", - port->wwpn); + return zfcp_erp_port_strategy_open_port(act); + + case ZFCP_ERP_STEP_PORT_OPENING: + if (atomic_read(&act->port->status) & ZFCP_STATUS_COMMON_OPEN) + retval = ZFCP_ERP_SUCCEEDED; + else retval = ZFCP_ERP_FAILED; - goto out; - } /* else it's closed now, open it */ - break; - } - if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) - retval = ZFCP_ERP_EXIT; - else - retval = zfcp_erp_port_strategy_open(erp_action); + /* this is needed anyway */ + zfcp_erp_port_strategy_open_ns_wake(act); + return retval; - out: - return retval; + default: + return ZFCP_ERP_FAILED; + } } -static int -zfcp_erp_port_strategy_open(struct zfcp_erp_action *erp_action) +static int zfcp_erp_port_strategy_open_lookup(struct zfcp_erp_action *act) { int retval; - if (atomic_test_mask(ZFCP_STATUS_PORT_WKA, - &erp_action->port->status)) - retval = zfcp_erp_port_strategy_open_nameserver(erp_action); - else - retval = zfcp_erp_port_strategy_open_common(erp_action); - - return retval; + retval = zfcp_fc_ns_gid_pn_request(act); + if (retval == -ENOMEM) + return ZFCP_ERP_NOMEM; + act->step = ZFCP_ERP_STEP_NAMESERVER_LOOKUP; + if (retval) + return ZFCP_ERP_FAILED; + return ZFCP_ERP_CONTINUES; } -static int -zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *erp_action) +static int zfcp_erp_open_ptp_port(struct zfcp_erp_action *act) { - int retval = 0; - struct zfcp_adapter *adapter = erp_action->adapter; - struct zfcp_port *port = erp_action->port; + struct zfcp_adapter *adapter = act->adapter; + struct zfcp_port *port = act->port; - switch (erp_action->step) { + if (port->wwpn != adapter->peer_wwpn) { + dev_err(&adapter->ccw_device->dev, + "Failed to open port 0x%016Lx, " + "Peer WWPN 0x%016Lx does not " + "match.\n", port->wwpn, + adapter->peer_wwpn); + zfcp_erp_port_failed(port, 25, NULL); + return ZFCP_ERP_FAILED; + } + port->d_id = adapter->peer_d_id; + atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status); + return zfcp_erp_port_strategy_open_port(act); +} + +static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act) +{ + struct zfcp_adapter *adapter = act->adapter; + struct zfcp_port *port = act->port; + struct zfcp_port *ns_port = adapter->nameserver_port; + int p_status = atomic_read(&port->status); + switch (act->step) { case ZFCP_ERP_STEP_UNINITIALIZED: case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: case ZFCP_ERP_STEP_PORT_CLOSING: - if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) { - if (port->wwpn != adapter->peer_wwpn) { - ZFCP_LOG_NORMAL("Failed to open port 0x%016Lx " - "on adapter %s.\nPeer WWPN " - "0x%016Lx does not match\n", - port->wwpn, - zfcp_get_busid_by_adapter(adapter), - adapter->peer_wwpn); - zfcp_erp_port_failed(port, 25, NULL); - retval = ZFCP_ERP_FAILED; - break; - } - port->d_id = adapter->peer_d_id; - atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status); - retval = zfcp_erp_port_strategy_open_port(erp_action); - break; + if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) + return zfcp_erp_open_ptp_port(act); + if (!ns_port) { + dev_err(&adapter->ccw_device->dev, + "Nameserver port unavailable.\n"); + return ZFCP_ERP_FAILED; } - if (!(adapter->nameserver_port)) { - retval = zfcp_nameserver_enqueue(adapter); - if (retval != 0) { - ZFCP_LOG_NORMAL("error: nameserver port " - "unavailable for adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - retval = ZFCP_ERP_FAILED; - break; - } - } - if (!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, - &adapter->nameserver_port->status)) { - ZFCP_LOG_DEBUG("nameserver port is not open -> open " - "nameserver port\n"); + if (!(atomic_read(&ns_port->status) & + ZFCP_STATUS_COMMON_UNBLOCKED)) { /* nameserver port may live again */ atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, - &adapter->nameserver_port->status); - if (zfcp_erp_port_reopen(adapter->nameserver_port, 0, - 77, erp_action) >= 0) { - erp_action->step = - ZFCP_ERP_STEP_NAMESERVER_OPEN; - retval = ZFCP_ERP_CONTINUES; - } else - retval = ZFCP_ERP_FAILED; - break; + &ns_port->status); + if (zfcp_erp_port_reopen(ns_port, 0, 77, act) >= 0) { + act->step = ZFCP_ERP_STEP_NAMESERVER_OPEN; + return ZFCP_ERP_CONTINUES; + } + return ZFCP_ERP_FAILED; } /* else nameserver port is already open, fall through */ case ZFCP_ERP_STEP_NAMESERVER_OPEN: - if (!atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, - &adapter->nameserver_port->status)) { - ZFCP_LOG_DEBUG("open failed for nameserver port\n"); - retval = ZFCP_ERP_FAILED; - } else { - ZFCP_LOG_DEBUG("nameserver port is open -> " - "nameserver look-up for port 0x%016Lx\n", - port->wwpn); - retval = zfcp_erp_port_strategy_open_common_lookup - (erp_action); - } - break; + if (!(atomic_read(&ns_port->status) & ZFCP_STATUS_COMMON_OPEN)) + return ZFCP_ERP_FAILED; + return zfcp_erp_port_strategy_open_lookup(act); case ZFCP_ERP_STEP_NAMESERVER_LOOKUP: - if (!atomic_test_mask(ZFCP_STATUS_PORT_DID_DID, &port->status)) { - if (atomic_test_mask - (ZFCP_STATUS_PORT_INVALID_WWPN, &port->status)) { - ZFCP_LOG_DEBUG("nameserver look-up failed " - "for port 0x%016Lx " - "(misconfigured WWPN?)\n", - port->wwpn); + if (!(p_status & ZFCP_STATUS_PORT_DID_DID)) { + if (p_status & (ZFCP_STATUS_PORT_INVALID_WWPN)) { zfcp_erp_port_failed(port, 26, NULL); - retval = ZFCP_ERP_EXIT; - } else { - ZFCP_LOG_DEBUG("nameserver look-up failed for " - "port 0x%016Lx\n", port->wwpn); - retval = ZFCP_ERP_FAILED; + return ZFCP_ERP_EXIT; } - } else { - ZFCP_LOG_DEBUG("port 0x%016Lx has d_id=0x%06x -> " - "trying open\n", port->wwpn, port->d_id); - retval = zfcp_erp_port_strategy_open_port(erp_action); + return ZFCP_ERP_FAILED; } - break; + return zfcp_erp_port_strategy_open_port(act); case ZFCP_ERP_STEP_PORT_OPENING: /* D_ID might have changed during open */ - if (atomic_test_mask((ZFCP_STATUS_COMMON_OPEN | - ZFCP_STATUS_PORT_DID_DID), - &port->status)) { - ZFCP_LOG_DEBUG("port 0x%016Lx is open\n", port->wwpn); - retval = ZFCP_ERP_SUCCEEDED; - } else { - ZFCP_LOG_DEBUG("open failed for port 0x%016Lx\n", - port->wwpn); - retval = ZFCP_ERP_FAILED; - } - break; - - default: - ZFCP_LOG_NORMAL("bug: unknown erp step 0x%08x\n", - erp_action->step); - retval = ZFCP_ERP_FAILED; + if ((p_status & ZFCP_STATUS_COMMON_OPEN) && + (p_status & ZFCP_STATUS_PORT_DID_DID)) + return ZFCP_ERP_SUCCEEDED; + /* fall through otherwise */ } + return ZFCP_ERP_FAILED; +} - return retval; +static int zfcp_erp_port_strategy_open(struct zfcp_erp_action *act) +{ + if (atomic_read(&act->port->status) & (ZFCP_STATUS_PORT_WKA)) + return zfcp_erp_port_strategy_open_nameserver(act); + return zfcp_erp_port_strategy_open_common(act); } -static int -zfcp_erp_port_strategy_open_nameserver(struct zfcp_erp_action *erp_action) +static int zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action) { - int retval; struct zfcp_port *port = erp_action->port; switch (erp_action->step) { - case ZFCP_ERP_STEP_UNINITIALIZED: - case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: - case ZFCP_ERP_STEP_PORT_CLOSING: - ZFCP_LOG_DEBUG("port 0x%016Lx has d_id=0x%06x -> trying open\n", - port->wwpn, port->d_id); - retval = zfcp_erp_port_strategy_open_port(erp_action); + zfcp_erp_port_strategy_clearstati(port); + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN) + return zfcp_erp_port_strategy_close(erp_action); break; - case ZFCP_ERP_STEP_PORT_OPENING: - if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) { - ZFCP_LOG_DEBUG("WKA port is open\n"); - retval = ZFCP_ERP_SUCCEEDED; - } else { - ZFCP_LOG_DEBUG("open failed for WKA port\n"); - retval = ZFCP_ERP_FAILED; - } - /* this is needed anyway (dont care for retval of wakeup) */ - ZFCP_LOG_DEBUG("continue other open port operations\n"); - zfcp_erp_port_strategy_open_nameserver_wakeup(erp_action); + case ZFCP_ERP_STEP_PORT_CLOSING: + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN) + return ZFCP_ERP_FAILED; break; - - default: - ZFCP_LOG_NORMAL("bug: unknown erp step 0x%08x\n", - erp_action->step); - retval = ZFCP_ERP_FAILED; } + if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) + return ZFCP_ERP_EXIT; + else + return zfcp_erp_port_strategy_open(erp_action); - return retval; -} - -/* - * function: - * - * purpose: makes the erp thread continue with reopen (physical) port - * actions which have been paused until the name server port - * is opened (or failed) - * - * returns: 0 (a kind of void retval, its not used) - */ -static int -zfcp_erp_port_strategy_open_nameserver_wakeup(struct zfcp_erp_action - *ns_erp_action) -{ - int retval = 0; - unsigned long flags; - struct zfcp_adapter *adapter = ns_erp_action->adapter; - struct zfcp_erp_action *erp_action, *tmp; - - read_lock_irqsave(&adapter->erp_lock, flags); - list_for_each_entry_safe(erp_action, tmp, &adapter->erp_running_head, - list) { - if (erp_action->step == ZFCP_ERP_STEP_NAMESERVER_OPEN) { - if (atomic_test_mask( - ZFCP_STATUS_COMMON_ERP_FAILED, - &adapter->nameserver_port->status)) - zfcp_erp_port_failed(erp_action->port, 27, - NULL); - zfcp_erp_action_ready(erp_action); - } - } - read_unlock_irqrestore(&adapter->erp_lock, flags); - - return retval; -} - -/* - * function: - * - * purpose: - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *erp_action) -{ - int retval; - - retval = zfcp_fsf_close_physical_port(erp_action); - if (retval == -ENOMEM) { - retval = ZFCP_ERP_NOMEM; - goto out; - } - erp_action->step = ZFCP_ERP_STEP_PHYS_PORT_CLOSING; - if (retval != 0) { - /* could not send 'open', fail */ - retval = ZFCP_ERP_FAILED; - goto out; - } - retval = ZFCP_ERP_CONTINUES; - out: - return retval; + return ZFCP_ERP_FAILED; } -static int -zfcp_erp_port_strategy_clearstati(struct zfcp_port *port) +static void zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *unit) { - int retval = 0; - atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING | ZFCP_STATUS_COMMON_CLOSING | ZFCP_STATUS_COMMON_ACCESS_DENIED | - ZFCP_STATUS_PORT_DID_DID | - ZFCP_STATUS_PORT_PHYS_CLOSING | - ZFCP_STATUS_PORT_INVALID_WWPN, - &port->status); - return retval; -} - -/* - * function: - * - * purpose: - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action) -{ - int retval; - - retval = zfcp_fsf_close_port(erp_action); - if (retval == -ENOMEM) { - retval = ZFCP_ERP_NOMEM; - goto out; - } - erp_action->step = ZFCP_ERP_STEP_PORT_CLOSING; - if (retval != 0) { - /* could not send 'close', fail */ - retval = ZFCP_ERP_FAILED; - goto out; - } - retval = ZFCP_ERP_CONTINUES; - out: - return retval; + ZFCP_STATUS_UNIT_SHARED | + ZFCP_STATUS_UNIT_READONLY, + &unit->status); } -/* - * function: - * - * purpose: - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action) +static int zfcp_erp_unit_strategy_close(struct zfcp_erp_action *erp_action) { - int retval; - - retval = zfcp_fsf_open_port(erp_action); - if (retval == -ENOMEM) { - retval = ZFCP_ERP_NOMEM; - goto out; - } - erp_action->step = ZFCP_ERP_STEP_PORT_OPENING; - if (retval != 0) { - /* could not send 'open', fail */ - retval = ZFCP_ERP_FAILED; - goto out; - } - retval = ZFCP_ERP_CONTINUES; - out: - return retval; + int retval = zfcp_fsf_close_unit(erp_action); + if (retval == -ENOMEM) + return ZFCP_ERP_NOMEM; + erp_action->step = ZFCP_ERP_STEP_UNIT_CLOSING; + if (retval) + return ZFCP_ERP_FAILED; + return ZFCP_ERP_CONTINUES; } -/* - * function: - * - * purpose: - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_port_strategy_open_common_lookup(struct zfcp_erp_action *erp_action) +static int zfcp_erp_unit_strategy_open(struct zfcp_erp_action *erp_action) { - int retval; - - retval = zfcp_ns_gid_pn_request(erp_action); - if (retval == -ENOMEM) { - retval = ZFCP_ERP_NOMEM; - goto out; - } - erp_action->step = ZFCP_ERP_STEP_NAMESERVER_LOOKUP; - if (retval != 0) { - /* could not send nameserver request, fail */ - retval = ZFCP_ERP_FAILED; - goto out; - } - retval = ZFCP_ERP_CONTINUES; - out: - return retval; + int retval = zfcp_fsf_open_unit(erp_action); + if (retval == -ENOMEM) + return ZFCP_ERP_NOMEM; + erp_action->step = ZFCP_ERP_STEP_UNIT_OPENING; + if (retval) + return ZFCP_ERP_FAILED; + return ZFCP_ERP_CONTINUES; } -/* - * function: - * - * purpose: this routine executes the 'Reopen Unit' action - * currently no retries - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_SUCCEEDED - action finished successfully - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_unit_strategy(struct zfcp_erp_action *erp_action) +static int zfcp_erp_unit_strategy(struct zfcp_erp_action *erp_action) { - int retval = ZFCP_ERP_FAILED; struct zfcp_unit *unit = erp_action->unit; switch (erp_action->step) { - - /* - * FIXME: - * the ULP spec. begs for waiting for oustanding commands - */ case ZFCP_ERP_STEP_UNINITIALIZED: zfcp_erp_unit_strategy_clearstati(unit); - if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) { - ZFCP_LOG_DEBUG("unit 0x%016Lx is open -> " - "trying close\n", unit->fcp_lun); - retval = zfcp_erp_unit_strategy_close(erp_action); - break; - } - /* else it's already closed, fall through */ + if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN) + return zfcp_erp_unit_strategy_close(erp_action); + /* already closed, fall through */ case ZFCP_ERP_STEP_UNIT_CLOSING: - if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) { - ZFCP_LOG_DEBUG("close failed for unit 0x%016Lx\n", - unit->fcp_lun); - retval = ZFCP_ERP_FAILED; - } else { - if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) - retval = ZFCP_ERP_EXIT; - else { - ZFCP_LOG_DEBUG("unit 0x%016Lx is not open -> " - "trying open\n", unit->fcp_lun); - retval = - zfcp_erp_unit_strategy_open(erp_action); - } - } - break; + if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN) + return ZFCP_ERP_FAILED; + if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) + return ZFCP_ERP_EXIT; + return zfcp_erp_unit_strategy_open(erp_action); case ZFCP_ERP_STEP_UNIT_OPENING: - if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) { - ZFCP_LOG_DEBUG("unit 0x%016Lx is open\n", - unit->fcp_lun); - retval = ZFCP_ERP_SUCCEEDED; - } else { - ZFCP_LOG_DEBUG("open failed for unit 0x%016Lx\n", - unit->fcp_lun); - retval = ZFCP_ERP_FAILED; - } - break; + if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN) + return ZFCP_ERP_SUCCEEDED; } - - return retval; + return ZFCP_ERP_FAILED; } -static int -zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *unit) +static int zfcp_erp_strategy_check_unit(struct zfcp_unit *unit, int result) { - int retval = 0; - - atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING | - ZFCP_STATUS_COMMON_CLOSING | - ZFCP_STATUS_COMMON_ACCESS_DENIED | - ZFCP_STATUS_UNIT_SHARED | - ZFCP_STATUS_UNIT_READONLY, - &unit->status); + switch (result) { + case ZFCP_ERP_SUCCEEDED : + atomic_set(&unit->erp_counter, 0); + zfcp_erp_unit_unblock(unit); + break; + case ZFCP_ERP_FAILED : + atomic_inc(&unit->erp_counter); + if (atomic_read(&unit->erp_counter) > ZFCP_MAX_ERPS) + zfcp_erp_unit_failed(unit, 21, NULL); + break; + } - return retval; + if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { + zfcp_erp_unit_block(unit, 0); + result = ZFCP_ERP_EXIT; + } + return result; } -/* - * function: - * - * purpose: - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_unit_strategy_close(struct zfcp_erp_action *erp_action) +static int zfcp_erp_strategy_check_port(struct zfcp_port *port, int result) { - int retval; + switch (result) { + case ZFCP_ERP_SUCCEEDED : + atomic_set(&port->erp_counter, 0); + zfcp_erp_port_unblock(port); + break; - retval = zfcp_fsf_close_unit(erp_action); - if (retval == -ENOMEM) { - retval = ZFCP_ERP_NOMEM; - goto out; - } - erp_action->step = ZFCP_ERP_STEP_UNIT_CLOSING; - if (retval != 0) { - /* could not send 'close', fail */ - retval = ZFCP_ERP_FAILED; - goto out; + case ZFCP_ERP_FAILED : + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC) { + zfcp_erp_port_block(port, 0); + result = ZFCP_ERP_EXIT; + } + atomic_inc(&port->erp_counter); + if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS) + zfcp_erp_port_failed(port, 22, NULL); + break; } - retval = ZFCP_ERP_CONTINUES; - out: - return retval; + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { + zfcp_erp_port_block(port, 0); + result = ZFCP_ERP_EXIT; + } + return result; } -/* - * function: - * - * purpose: - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_unit_strategy_open(struct zfcp_erp_action *erp_action) +static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter, + int result) { - int retval; + switch (result) { + case ZFCP_ERP_SUCCEEDED : + atomic_set(&adapter->erp_counter, 0); + zfcp_erp_adapter_unblock(adapter); + break; - retval = zfcp_fsf_open_unit(erp_action); - if (retval == -ENOMEM) { - retval = ZFCP_ERP_NOMEM; - goto out; - } - erp_action->step = ZFCP_ERP_STEP_UNIT_OPENING; - if (retval != 0) { - /* could not send 'open', fail */ - retval = ZFCP_ERP_FAILED; - goto out; + case ZFCP_ERP_FAILED : + atomic_inc(&adapter->erp_counter); + if (atomic_read(&adapter->erp_counter) > ZFCP_MAX_ERPS) + zfcp_erp_adapter_failed(adapter, 23, NULL); + break; } - retval = ZFCP_ERP_CONTINUES; - out: - return retval; -} -void zfcp_erp_start_timer(struct zfcp_fsf_req *fsf_req) -{ - BUG_ON(!fsf_req->erp_action); - fsf_req->timer.function = zfcp_erp_timeout_handler; - fsf_req->timer.data = (unsigned long) fsf_req->erp_action; - fsf_req->timer.expires = jiffies + ZFCP_ERP_FSFREQ_TIMEOUT; - add_timer(&fsf_req->timer); + if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { + zfcp_erp_adapter_block(adapter, 0); + result = ZFCP_ERP_EXIT; + } + return result; } -/* - * function: - * - * purpose: enqueue the specified error recovery action, if needed - * - * returns: - */ -static int zfcp_erp_action_enqueue(int want, struct zfcp_adapter *adapter, - struct zfcp_port *port, - struct zfcp_unit *unit, u8 id, void *ref) +static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action, + int result) { - int retval = 1, need = want; - struct zfcp_erp_action *erp_action = NULL; - u32 status = 0; + struct zfcp_adapter *adapter = erp_action->adapter; + struct zfcp_port *port = erp_action->port; + struct zfcp_unit *unit = erp_action->unit; - /* - * We need some rules here which check whether we really need - * this action or whether we should just drop it. - * E.g. if there is a unfinished 'Reopen Port' request then we drop a - * 'Reopen Unit' request for an associated unit since we can't - * satisfy this request now. A 'Reopen Port' action will trigger - * 'Reopen Unit' actions when it completes. - * Thus, there are only actions in the queue which can immediately be - * executed. This makes the processing of the action queue more - * efficient. - */ - - if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, - &adapter->status)) - return -EIO; + switch (erp_action->action) { - /* check whether we really need this */ - switch (want) { case ZFCP_ERP_ACTION_REOPEN_UNIT: - if (atomic_test_mask - (ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status)) { - goto out; - } - if (!atomic_test_mask - (ZFCP_STATUS_COMMON_RUNNING, &port->status) || - atomic_test_mask - (ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { - goto out; - } - if (!atomic_test_mask - (ZFCP_STATUS_COMMON_UNBLOCKED, &port->status)) - need = ZFCP_ERP_ACTION_REOPEN_PORT; - /* fall through !!! */ - - case ZFCP_ERP_ACTION_REOPEN_PORT: - if (atomic_test_mask - (ZFCP_STATUS_COMMON_ERP_INUSE, &port->status)) { - goto out; - } - /* fall through !!! */ + result = zfcp_erp_strategy_check_unit(unit, result); + break; case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, - &port->status)) { - if (port->erp_action.action != - ZFCP_ERP_ACTION_REOPEN_PORT_FORCED) { - ZFCP_LOG_INFO("dropped erp action %i (port " - "0x%016Lx, action in use: %i)\n", - want, port->wwpn, - port->erp_action.action); - } - goto out; - } - if (!atomic_test_mask - (ZFCP_STATUS_COMMON_RUNNING, &adapter->status) || - atomic_test_mask - (ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) { - goto out; - } - if (!atomic_test_mask - (ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status)) - need = ZFCP_ERP_ACTION_REOPEN_ADAPTER; - /* fall through !!! */ + case ZFCP_ERP_ACTION_REOPEN_PORT: + result = zfcp_erp_strategy_check_port(port, result); + break; case ZFCP_ERP_ACTION_REOPEN_ADAPTER: - if (atomic_test_mask - (ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status)) { - goto out; - } + result = zfcp_erp_strategy_check_adapter(adapter, result); break; - - default: - ZFCP_LOG_NORMAL("bug: unknown erp action requested " - "on adapter %s (action=%d)\n", - zfcp_get_busid_by_adapter(adapter), want); - goto out; } + return result; +} - /* check whether we need something stronger first */ - if (need) { - ZFCP_LOG_DEBUG("stronger erp action %d needed before " - "erp action %d on adapter %s\n", - need, want, zfcp_get_busid_by_adapter(adapter)); - } +static int zfcp_erp_strat_change_det(atomic_t *target_status, u32 erp_status) +{ + int status = atomic_read(target_status); - /* mark adapter to have some error recovery pending */ - atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status); + if ((status & ZFCP_STATUS_COMMON_RUNNING) && + (erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY)) + return 1; /* take it online */ - /* setup error recovery action */ - switch (need) { + if (!(status & ZFCP_STATUS_COMMON_RUNNING) && + !(erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY)) + return 1; /* take it offline */ - case ZFCP_ERP_ACTION_REOPEN_UNIT: - zfcp_unit_get(unit); - atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status); - erp_action = &unit->erp_action; - if (!atomic_test_mask - (ZFCP_STATUS_COMMON_RUNNING, &unit->status)) - status = ZFCP_STATUS_ERP_CLOSE_ONLY; + return 0; +} + +static int zfcp_erp_strategy_statechange(struct zfcp_erp_action *act, int ret) +{ + int action = act->action; + struct zfcp_adapter *adapter = act->adapter; + struct zfcp_port *port = act->port; + struct zfcp_unit *unit = act->unit; + u32 erp_status = act->status; + + switch (action) { + case ZFCP_ERP_ACTION_REOPEN_ADAPTER: + if (zfcp_erp_strat_change_det(&adapter->status, erp_status)) { + _zfcp_erp_adapter_reopen(adapter, + ZFCP_STATUS_COMMON_ERP_FAILED, + 67, NULL); + return ZFCP_ERP_EXIT; + } break; - case ZFCP_ERP_ACTION_REOPEN_PORT: case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: - zfcp_port_get(port); - zfcp_erp_action_dismiss_port(port); - atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status); - erp_action = &port->erp_action; - if (!atomic_test_mask - (ZFCP_STATUS_COMMON_RUNNING, &port->status)) - status = ZFCP_STATUS_ERP_CLOSE_ONLY; + case ZFCP_ERP_ACTION_REOPEN_PORT: + if (zfcp_erp_strat_change_det(&port->status, erp_status)) { + _zfcp_erp_port_reopen(port, + ZFCP_STATUS_COMMON_ERP_FAILED, + 68, NULL); + return ZFCP_ERP_EXIT; + } break; - case ZFCP_ERP_ACTION_REOPEN_ADAPTER: - zfcp_adapter_get(adapter); - zfcp_erp_action_dismiss_adapter(adapter); - atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status); - erp_action = &adapter->erp_action; - if (!atomic_test_mask - (ZFCP_STATUS_COMMON_RUNNING, &adapter->status)) - status = ZFCP_STATUS_ERP_CLOSE_ONLY; + case ZFCP_ERP_ACTION_REOPEN_UNIT: + if (zfcp_erp_strat_change_det(&unit->status, erp_status)) { + _zfcp_erp_unit_reopen(unit, + ZFCP_STATUS_COMMON_ERP_FAILED, + 69, NULL); + return ZFCP_ERP_EXIT; + } break; } - - memset(erp_action, 0, sizeof (struct zfcp_erp_action)); - erp_action->adapter = adapter; - erp_action->port = port; - erp_action->unit = unit; - erp_action->action = need; - erp_action->status = status; - - ++adapter->erp_total_count; - - /* finally put it into 'ready' queue and kick erp thread */ - list_add_tail(&erp_action->list, &adapter->erp_ready_head); - up(&adapter->erp_ready_sem); - zfcp_rec_dbf_event_thread(1, adapter, 0); - retval = 0; - out: - zfcp_rec_dbf_event_trigger(id, ref, want, need, erp_action, - adapter, port, unit); - return retval; + return ret; } -static int -zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action) +static void zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action) { - int retval = 0; struct zfcp_adapter *adapter = erp_action->adapter; - --adapter->erp_total_count; + adapter->erp_total_count--; if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { - --adapter->erp_low_mem_count; + adapter->erp_low_mem_count--; erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; } @@ -2919,141 +1224,458 @@ zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action) atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &erp_action->unit->status); break; + case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: case ZFCP_ERP_ACTION_REOPEN_PORT: atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &erp_action->port->status); break; + case ZFCP_ERP_ACTION_REOPEN_ADAPTER: atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &erp_action->adapter->status); break; - default: - /* bug */ - break; } - return retval; } -/** - * zfcp_erp_action_cleanup - * - * Register unit with scsi stack if appropriate and fix reference counts. - * Note: Temporary units are not registered with scsi stack. - */ -static void -zfcp_erp_action_cleanup(int action, struct zfcp_adapter *adapter, - struct zfcp_port *port, struct zfcp_unit *unit, - int result) +struct zfcp_erp_add_work { + struct zfcp_unit *unit; + struct work_struct work; +}; + +static void zfcp_erp_scsi_scan(struct work_struct *work) { - switch (action) { + struct zfcp_erp_add_work *p = + container_of(work, struct zfcp_erp_add_work, work); + struct zfcp_unit *unit = p->unit; + struct fc_rport *rport = unit->port->rport; + scsi_scan_target(&rport->dev, 0, rport->scsi_target_id, + unit->scsi_lun, 0); + atomic_clear_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status); + zfcp_unit_put(unit); + kfree(p); +} + +static void zfcp_erp_schedule_work(struct zfcp_unit *unit) +{ + struct zfcp_erp_add_work *p; + + p = kzalloc(sizeof(*p), GFP_KERNEL); + if (!p) { + dev_err(&unit->port->adapter->ccw_device->dev, + "Out of resources. Could not register unit " + "0x%016Lx on port 0x%016Lx with SCSI stack.\n", + unit->fcp_lun, unit->port->wwpn); + return; + } + + zfcp_unit_get(unit); + atomic_set_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status); + INIT_WORK(&p->work, zfcp_erp_scsi_scan); + p->unit = unit; + schedule_work(&p->work); +} + +static void zfcp_erp_rport_register(struct zfcp_port *port) +{ + struct fc_rport_identifiers ids; + ids.node_name = port->wwnn; + ids.port_name = port->wwpn; + ids.port_id = port->d_id; + ids.roles = FC_RPORT_ROLE_FCP_TARGET; + port->rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); + if (!port->rport) { + dev_err(&port->adapter->ccw_device->dev, + "Failed registration of rport " + "0x%016Lx.\n", port->wwpn); + return; + } + + scsi_target_unblock(&port->rport->dev); + port->rport->maxframe_size = port->maxframe_size; + port->rport->supported_classes = port->supported_classes; +} + +static void zfcp_erp_rports_del(struct zfcp_adapter *adapter) +{ + struct zfcp_port *port; + list_for_each_entry(port, &adapter->port_list_head, list) + if (port->rport && !(atomic_read(&port->status) & + ZFCP_STATUS_PORT_WKA)) { + fc_remote_port_delete(port->rport); + port->rport = NULL; + } +} + +static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result) +{ + struct zfcp_adapter *adapter = act->adapter; + struct zfcp_port *port = act->port; + struct zfcp_unit *unit = act->unit; + + switch (act->action) { case ZFCP_ERP_ACTION_REOPEN_UNIT: - if ((result == ZFCP_ERP_SUCCEEDED) - && (!atomic_test_mask(ZFCP_STATUS_UNIT_TEMPORARY, - &unit->status)) - && !unit->device - && port->rport) { + if ((result == ZFCP_ERP_SUCCEEDED) && + !unit->device && port->rport) { atomic_set_mask(ZFCP_STATUS_UNIT_REGISTERED, &unit->status); - if (atomic_test_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, - &unit->status) == 0) + if (!(atomic_read(&unit->status) & + ZFCP_STATUS_UNIT_SCSI_WORK_PENDING)) zfcp_erp_schedule_work(unit); } zfcp_unit_put(unit); break; + case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: case ZFCP_ERP_ACTION_REOPEN_PORT: - if (atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, - &port->status)) { + if (atomic_read(&port->status) & ZFCP_STATUS_PORT_NO_WWPN) { zfcp_port_put(port); - break; - } - - if ((result == ZFCP_ERP_SUCCEEDED) - && !port->rport) { - struct fc_rport_identifiers ids; - ids.node_name = port->wwnn; - ids.port_name = port->wwpn; - ids.port_id = port->d_id; - ids.roles = FC_RPORT_ROLE_FCP_TARGET; - port->rport = - fc_remote_port_add(adapter->scsi_host, 0, &ids); - if (!port->rport) - ZFCP_LOG_NORMAL("failed registration of rport" - "(adapter %s, wwpn=0x%016Lx)\n", - zfcp_get_busid_by_port(port), - port->wwpn); - else { - scsi_target_unblock(&port->rport->dev); - port->rport->maxframe_size = port->maxframe_size; - port->rport->supported_classes = - port->supported_classes; - } + return; } + if ((result == ZFCP_ERP_SUCCEEDED) && !port->rport) + zfcp_erp_rport_register(port); if ((result != ZFCP_ERP_SUCCEEDED) && port->rport) { fc_remote_port_delete(port->rport); port->rport = NULL; } zfcp_port_put(port); break; + case ZFCP_ERP_ACTION_REOPEN_ADAPTER: - if (result != ZFCP_ERP_SUCCEEDED) { - list_for_each_entry(port, &adapter->port_list_head, list) - if (port->rport && - !atomic_test_mask(ZFCP_STATUS_PORT_WKA, - &port->status)) { - fc_remote_port_delete(port->rport); - port->rport = NULL; - } - } + if (result != ZFCP_ERP_SUCCEEDED) + zfcp_erp_rports_del(adapter); zfcp_adapter_put(adapter); break; - default: - break; } } +static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action) +{ + switch (erp_action->action) { + case ZFCP_ERP_ACTION_REOPEN_ADAPTER: + return zfcp_erp_adapter_strategy(erp_action); + case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: + return zfcp_erp_port_forced_strategy(erp_action); + case ZFCP_ERP_ACTION_REOPEN_PORT: + return zfcp_erp_port_strategy(erp_action); + case ZFCP_ERP_ACTION_REOPEN_UNIT: + return zfcp_erp_unit_strategy(erp_action); + } + return ZFCP_ERP_FAILED; +} -static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter) +static int zfcp_erp_strategy(struct zfcp_erp_action *erp_action) { - struct zfcp_port *port; + int retval; + struct zfcp_adapter *adapter = erp_action->adapter; + unsigned long flags; - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status)) - zfcp_erp_action_dismiss(&adapter->erp_action); - else - list_for_each_entry(port, &adapter->port_list_head, list) - zfcp_erp_action_dismiss_port(port); + read_lock_irqsave(&zfcp_data.config_lock, flags); + write_lock(&adapter->erp_lock); + + zfcp_erp_strategy_check_fsfreq(erp_action); + + if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) { + zfcp_erp_action_dequeue(erp_action); + retval = ZFCP_ERP_DISMISSED; + goto unlock; + } + + zfcp_erp_action_to_running(erp_action); + + /* no lock to allow for blocking operations */ + write_unlock(&adapter->erp_lock); + read_unlock_irqrestore(&zfcp_data.config_lock, flags); + retval = zfcp_erp_strategy_do_action(erp_action); + read_lock_irqsave(&zfcp_data.config_lock, flags); + write_lock(&adapter->erp_lock); + + if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) + retval = ZFCP_ERP_CONTINUES; + + switch (retval) { + case ZFCP_ERP_NOMEM: + if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) { + ++adapter->erp_low_mem_count; + erp_action->status |= ZFCP_STATUS_ERP_LOWMEM; + } + if (adapter->erp_total_count == adapter->erp_low_mem_count) + _zfcp_erp_adapter_reopen(adapter, 0, 66, NULL); + else { + zfcp_erp_strategy_memwait(erp_action); + retval = ZFCP_ERP_CONTINUES; + } + goto unlock; + + case ZFCP_ERP_CONTINUES: + if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { + --adapter->erp_low_mem_count; + erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; + } + goto unlock; + } + + retval = zfcp_erp_strategy_check_target(erp_action, retval); + zfcp_erp_action_dequeue(erp_action); + retval = zfcp_erp_strategy_statechange(erp_action, retval); + if (retval == ZFCP_ERP_EXIT) + goto unlock; + zfcp_erp_strategy_followup_actions(erp_action); + + unlock: + write_unlock(&adapter->erp_lock); + read_unlock_irqrestore(&zfcp_data.config_lock, flags); + + if (retval != ZFCP_ERP_CONTINUES) + zfcp_erp_action_cleanup(erp_action, retval); + + return retval; } -static void zfcp_erp_action_dismiss_port(struct zfcp_port *port) +static int zfcp_erp_thread(void *data) { - struct zfcp_unit *unit; + struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; + struct list_head *next; + struct zfcp_erp_action *act; + unsigned long flags; - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status)) - zfcp_erp_action_dismiss(&port->erp_action); + daemonize("zfcperp%s", adapter->ccw_device->dev.bus_id); + /* Block all signals */ + siginitsetinv(¤t->blocked, 0); + atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); + wake_up(&adapter->erp_thread_wqh); + + while (!(atomic_read(&adapter->status) & + ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL)) { + write_lock_irqsave(&adapter->erp_lock, flags); + next = adapter->erp_ready_head.next; + write_unlock_irqrestore(&adapter->erp_lock, flags); + + if (next != &adapter->erp_ready_head) { + act = list_entry(next, struct zfcp_erp_action, list); + + /* there is more to come after dismission, no notify */ + if (zfcp_erp_strategy(act) != ZFCP_ERP_DISMISSED) + zfcp_erp_wakeup(adapter); + } + + zfcp_rec_dbf_event_thread(4, adapter); + down_interruptible(&adapter->erp_ready_sem); + zfcp_rec_dbf_event_thread(5, adapter); + } + + atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); + wake_up(&adapter->erp_thread_wqh); + + return 0; +} + +/** + * zfcp_erp_thread_setup - Start ERP thread for adapter + * @adapter: Adapter to start the ERP thread for + * + * Returns 0 on success or error code from kernel_thread() + */ +int zfcp_erp_thread_setup(struct zfcp_adapter *adapter) +{ + int retval; + + atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); + retval = kernel_thread(zfcp_erp_thread, adapter, SIGCHLD); + if (retval < 0) { + dev_err(&adapter->ccw_device->dev, + "Creation of ERP thread failed.\n"); + return retval; + } + wait_event(adapter->erp_thread_wqh, + atomic_read(&adapter->status) & + ZFCP_STATUS_ADAPTER_ERP_THREAD_UP); + return 0; +} + +/** + * zfcp_erp_thread_kill - Stop ERP thread. + * @adapter: Adapter where the ERP thread should be stopped. + * + * The caller of this routine ensures that the specified adapter has + * been shut down and that this operation has been completed. Thus, + * there are no pending erp_actions which would need to be handled + * here. + */ +void zfcp_erp_thread_kill(struct zfcp_adapter *adapter) +{ + atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, &adapter->status); + up(&adapter->erp_ready_sem); + zfcp_rec_dbf_event_thread_lock(2, adapter); + + wait_event(adapter->erp_thread_wqh, + !(atomic_read(&adapter->status) & + ZFCP_STATUS_ADAPTER_ERP_THREAD_UP)); + + atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, + &adapter->status); +} + +/** + * zfcp_erp_adapter_failed - Set adapter status to failed. + * @adapter: Failed adapter. + * @id: Event id for debug trace. + * @ref: Reference for debug trace. + */ +void zfcp_erp_adapter_failed(struct zfcp_adapter *adapter, u8 id, void *ref) +{ + zfcp_erp_modify_adapter_status(adapter, id, ref, + ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); + dev_err(&adapter->ccw_device->dev, "Adapter ERP failed.\n"); +} + +/** + * zfcp_erp_port_failed - Set port status to failed. + * @port: Failed port. + * @id: Event id for debug trace. + * @ref: Reference for debug trace. + */ +void zfcp_erp_port_failed(struct zfcp_port *port, u8 id, void *ref) +{ + zfcp_erp_modify_port_status(port, id, ref, + ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); + + if (atomic_read(&port->status) & ZFCP_STATUS_PORT_WKA) + dev_err(&port->adapter->ccw_device->dev, + "Port ERP failed for WKA port d_id=0x%06x.\n", + port->d_id); else - list_for_each_entry(unit, &port->unit_list_head, list) - zfcp_erp_action_dismiss_unit(unit); + dev_err(&port->adapter->ccw_device->dev, + "Port ERP failed for port wwpn=0x%016Lx.\n", + port->wwpn); } -static void zfcp_erp_action_dismiss_unit(struct zfcp_unit *unit) +/** + * zfcp_erp_unit_failed - Set unit status to failed. + * @unit: Failed unit. + * @id: Event id for debug trace. + * @ref: Reference for debug trace. + */ +void zfcp_erp_unit_failed(struct zfcp_unit *unit, u8 id, void *ref) { - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status)) - zfcp_erp_action_dismiss(&unit->erp_action); + zfcp_erp_modify_unit_status(unit, id, ref, + ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); + + dev_err(&unit->port->adapter->ccw_device->dev, + "Unit ERP failed for unit 0x%016Lx on port 0x%016Lx.\n", + unit->fcp_lun, unit->port->wwpn); } -static void zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action) +/** + * zfcp_erp_wait - wait for completion of error recovery on an adapter + * @adapter: adapter for which to wait for completion of its error recovery + */ +void zfcp_erp_wait(struct zfcp_adapter *adapter) { - list_move(&erp_action->list, &erp_action->adapter->erp_running_head); - zfcp_rec_dbf_event_action(145, erp_action); + wait_event(adapter->erp_done_wqh, + !(atomic_read(&adapter->status) & + ZFCP_STATUS_ADAPTER_ERP_PENDING)); +} + +/** + * zfcp_erp_modify_adapter_status - change adapter status bits + * @adapter: adapter to change the status + * @id: id for the debug trace + * @ref: reference for the debug trace + * @mask: status bits to change + * @set_or_clear: ZFCP_SET or ZFCP_CLEAR + * + * Changes in common status bits are propagated to attached ports and units. + */ +void zfcp_erp_modify_adapter_status(struct zfcp_adapter *adapter, u8 id, + void *ref, u32 mask, int set_or_clear) +{ + struct zfcp_port *port; + u32 common_mask = mask & ZFCP_COMMON_FLAGS; + + if (set_or_clear == ZFCP_SET) { + if (status_change_set(mask, &adapter->status)) + zfcp_rec_dbf_event_adapter(id, ref, adapter); + atomic_set_mask(mask, &adapter->status); + } else { + if (status_change_clear(mask, &adapter->status)) + zfcp_rec_dbf_event_adapter(id, ref, adapter); + atomic_clear_mask(mask, &adapter->status); + if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) + atomic_set(&adapter->erp_counter, 0); + } + + if (common_mask) + list_for_each_entry(port, &adapter->port_list_head, list) + zfcp_erp_modify_port_status(port, id, ref, common_mask, + set_or_clear); } -static void zfcp_erp_action_to_ready(struct zfcp_erp_action *erp_action) +/** + * zfcp_erp_modify_port_status - change port status bits + * @port: port to change the status bits + * @id: id for the debug trace + * @ref: reference for the debug trace + * @mask: status bits to change + * @set_or_clear: ZFCP_SET or ZFCP_CLEAR + * + * Changes in common status bits are propagated to attached units. + */ +void zfcp_erp_modify_port_status(struct zfcp_port *port, u8 id, void *ref, + u32 mask, int set_or_clear) { - list_move(&erp_action->list, &erp_action->adapter->erp_ready_head); - zfcp_rec_dbf_event_action(146, erp_action); + struct zfcp_unit *unit; + u32 common_mask = mask & ZFCP_COMMON_FLAGS; + + if (set_or_clear == ZFCP_SET) { + if (status_change_set(mask, &port->status)) + zfcp_rec_dbf_event_port(id, ref, port); + atomic_set_mask(mask, &port->status); + } else { + if (status_change_clear(mask, &port->status)) + zfcp_rec_dbf_event_port(id, ref, port); + atomic_clear_mask(mask, &port->status); + if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) + atomic_set(&port->erp_counter, 0); + } + + if (common_mask) + list_for_each_entry(unit, &port->unit_list_head, list) + zfcp_erp_modify_unit_status(unit, id, ref, common_mask, + set_or_clear); } +/** + * zfcp_erp_modify_unit_status - change unit status bits + * @unit: unit to change the status bits + * @id: id for the debug trace + * @ref: reference for the debug trace + * @mask: status bits to change + * @set_or_clear: ZFCP_SET or ZFCP_CLEAR + */ +void zfcp_erp_modify_unit_status(struct zfcp_unit *unit, u8 id, void *ref, + u32 mask, int set_or_clear) +{ + if (set_or_clear == ZFCP_SET) { + if (status_change_set(mask, &unit->status)) + zfcp_rec_dbf_event_unit(id, ref, unit); + atomic_set_mask(mask, &unit->status); + } else { + if (status_change_clear(mask, &unit->status)) + zfcp_rec_dbf_event_unit(id, ref, unit); + atomic_clear_mask(mask, &unit->status); + if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) { + atomic_set(&unit->erp_counter, 0); + } + } +} + +/** + * zfcp_erp_port_boxed - Mark port as "boxed" and start ERP + * @port: The "boxed" port. + * @id: The debug trace id. + * @id: Reference for the debug trace. + */ void zfcp_erp_port_boxed(struct zfcp_port *port, u8 id, void *ref) { unsigned long flags; @@ -3065,6 +1687,12 @@ void zfcp_erp_port_boxed(struct zfcp_port *port, u8 id, void *ref) zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref); } +/** + * zfcp_erp_unit_boxed - Mark unit as "boxed" and start ERP + * @port: The "boxed" unit. + * @id: The debug trace id. + * @id: Reference for the debug trace. + */ void zfcp_erp_unit_boxed(struct zfcp_unit *unit, u8 id, void *ref) { zfcp_erp_modify_unit_status(unit, id, ref, @@ -3072,6 +1700,15 @@ void zfcp_erp_unit_boxed(struct zfcp_unit *unit, u8 id, void *ref) zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref); } +/** + * zfcp_erp_port_access_denied - Adapter denied access to port. + * @port: port where access has been denied + * @id: id for debug trace + * @ref: reference for debug trace + * + * Since the adapter has denied access, stop using the port and the + * attached units. + */ void zfcp_erp_port_access_denied(struct zfcp_port *port, u8 id, void *ref) { unsigned long flags; @@ -3083,6 +1720,14 @@ void zfcp_erp_port_access_denied(struct zfcp_port *port, u8 id, void *ref) read_unlock_irqrestore(&zfcp_data.config_lock, flags); } +/** + * zfcp_erp_unit_access_denied - Adapter denied access to unit. + * @unit: unit where access has been denied + * @id: id for debug trace + * @ref: reference for debug trace + * + * Since the adapter has denied access, stop using the unit. + */ void zfcp_erp_unit_access_denied(struct zfcp_unit *unit, u8 id, void *ref) { zfcp_erp_modify_unit_status(unit, id, ref, @@ -3090,67 +1735,54 @@ void zfcp_erp_unit_access_denied(struct zfcp_unit *unit, u8 id, void *ref) ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET); } -void zfcp_erp_adapter_access_changed(struct zfcp_adapter *adapter, u8 id, - void *ref) +static void zfcp_erp_unit_access_changed(struct zfcp_unit *unit, u8 id, + void *ref) { - struct zfcp_port *port; - unsigned long flags; - - if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) + int status = atomic_read(&unit->status); + if (!(status & (ZFCP_STATUS_COMMON_ACCESS_DENIED | + ZFCP_STATUS_COMMON_ACCESS_BOXED))) return; - read_lock_irqsave(&zfcp_data.config_lock, flags); - if (adapter->nameserver_port) - zfcp_erp_port_access_changed(adapter->nameserver_port, id, ref); - list_for_each_entry(port, &adapter->port_list_head, list) - if (port != adapter->nameserver_port) - zfcp_erp_port_access_changed(port, id, ref); - read_unlock_irqrestore(&zfcp_data.config_lock, flags); + zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref); } -void zfcp_erp_port_access_changed(struct zfcp_port *port, u8 id, void *ref) +static void zfcp_erp_port_access_changed(struct zfcp_port *port, u8 id, + void *ref) { - struct zfcp_adapter *adapter = port->adapter; struct zfcp_unit *unit; + int status = atomic_read(&port->status); - if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED, - &port->status) && - !atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_BOXED, - &port->status)) { - if (!atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status)) + if (!(status & (ZFCP_STATUS_COMMON_ACCESS_DENIED | + ZFCP_STATUS_COMMON_ACCESS_BOXED))) { + if (!(status & ZFCP_STATUS_PORT_WKA)) list_for_each_entry(unit, &port->unit_list_head, list) zfcp_erp_unit_access_changed(unit, id, ref); return; } - ZFCP_LOG_NORMAL("reopen of port 0x%016Lx on adapter %s " - "(due to ACT update)\n", - port->wwpn, zfcp_get_busid_by_adapter(adapter)); - if (zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref)) - ZFCP_LOG_NORMAL("failed reopen of port" - "(adapter %s, wwpn=0x%016Lx)\n", - zfcp_get_busid_by_adapter(adapter), port->wwpn); + zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref); } -void zfcp_erp_unit_access_changed(struct zfcp_unit *unit, u8 id, void *ref) +/** + * zfcp_erp_adapter_access_changed - Process change in adapter ACT + * @adapter: Adapter where the Access Control Table (ACT) changed + * @id: Id for debug trace + * @ref: Reference for debug trace + */ +void zfcp_erp_adapter_access_changed(struct zfcp_adapter *adapter, u8 id, + void *ref) { - struct zfcp_adapter *adapter = unit->port->adapter; + struct zfcp_port *port; + unsigned long flags; - if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED, - &unit->status) && - !atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_BOXED, - &unit->status)) + if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) return; - ZFCP_LOG_NORMAL("reopen of unit 0x%016Lx on port 0x%016Lx " - " on adapter %s (due to ACT update)\n", - unit->fcp_lun, unit->port->wwpn, - zfcp_get_busid_by_adapter(adapter)); - if (zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref)) - ZFCP_LOG_NORMAL("failed reopen of unit (adapter %s, " - "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n", - zfcp_get_busid_by_adapter(adapter), - unit->port->wwpn, unit->fcp_lun); + read_lock_irqsave(&zfcp_data.config_lock, flags); + if (adapter->nameserver_port) + zfcp_erp_port_access_changed(adapter->nameserver_port, id, ref); + list_for_each_entry(port, &adapter->port_list_head, list) + if (port != adapter->nameserver_port) + zfcp_erp_port_access_changed(port, id, ref); + read_unlock_irqrestore(&zfcp_data.config_lock, flags); } - -#undef ZFCP_LOG_AREA diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h index 6abf178fda5..8065b2b224b 100644 --- a/drivers/s390/scsi/zfcp_ext.h +++ b/drivers/s390/scsi/zfcp_ext.h @@ -1,22 +1,9 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * External function declarations. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ #ifndef ZFCP_EXT_H @@ -24,172 +11,51 @@ #include "zfcp_def.h" -extern struct zfcp_data zfcp_data; - -/******************************** SYSFS *************************************/ -extern struct attribute_group *zfcp_driver_attr_groups[]; -extern int zfcp_sysfs_adapter_create_files(struct device *); -extern void zfcp_sysfs_adapter_remove_files(struct device *); -extern int zfcp_sysfs_port_create_files(struct device *, u32); -extern void zfcp_sysfs_port_remove_files(struct device *, u32); -extern int zfcp_sysfs_unit_create_files(struct device *); -extern void zfcp_sysfs_unit_remove_files(struct device *); -extern void zfcp_sysfs_port_release(struct device *); -extern void zfcp_sysfs_unit_release(struct device *); - -/**************************** CONFIGURATION *********************************/ -extern struct zfcp_unit *zfcp_get_unit_by_lun(struct zfcp_port *, fcp_lun_t); -extern struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *, wwn_t); -extern struct zfcp_port *zfcp_get_port_by_did(struct zfcp_adapter *, u32); -struct zfcp_adapter *zfcp_get_adapter_by_busid(char *); -extern struct zfcp_adapter *zfcp_adapter_enqueue(struct ccw_device *); -extern int zfcp_adapter_debug_register(struct zfcp_adapter *); -extern void zfcp_adapter_dequeue(struct zfcp_adapter *); -extern void zfcp_adapter_debug_unregister(struct zfcp_adapter *); -extern struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *, wwn_t, - u32, u32); -extern void zfcp_port_dequeue(struct zfcp_port *); +/* zfcp_aux.c */ +extern struct zfcp_unit *zfcp_get_unit_by_lun(struct zfcp_port *, + fcp_lun_t); +extern struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *, + wwn_t); +extern int zfcp_adapter_enqueue(struct ccw_device *); +extern void zfcp_adapter_dequeue(struct zfcp_adapter *); +extern struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *, wwn_t, u32, + u32); +extern void zfcp_port_dequeue(struct zfcp_port *); extern struct zfcp_unit *zfcp_unit_enqueue(struct zfcp_port *, fcp_lun_t); -extern void zfcp_unit_dequeue(struct zfcp_unit *); - -/******************************* S/390 IO ************************************/ -extern int zfcp_ccw_register(void); - -extern void zfcp_qdio_zero_sbals(struct qdio_buffer **, int, int); -extern int zfcp_qdio_allocate(struct zfcp_adapter *); -extern int zfcp_qdio_allocate_queues(struct zfcp_adapter *); -extern void zfcp_qdio_free_queues(struct zfcp_adapter *); -extern int zfcp_qdio_determine_pci(struct zfcp_qdio_queue *, - struct zfcp_fsf_req *); - -extern volatile struct qdio_buffer_element *zfcp_qdio_sbale_req - (struct zfcp_fsf_req *, int, int); -extern volatile struct qdio_buffer_element *zfcp_qdio_sbale_curr - (struct zfcp_fsf_req *); -extern int zfcp_qdio_sbals_from_sg - (struct zfcp_fsf_req *, unsigned long, struct scatterlist *, int, int); -extern int zfcp_qdio_sbals_from_scsicmnd - (struct zfcp_fsf_req *, unsigned long, struct scsi_cmnd *); - - -/******************************** FSF ****************************************/ -extern int zfcp_fsf_open_port(struct zfcp_erp_action *); -extern int zfcp_fsf_close_port(struct zfcp_erp_action *); -extern int zfcp_fsf_close_physical_port(struct zfcp_erp_action *); - -extern int zfcp_fsf_open_unit(struct zfcp_erp_action *); -extern int zfcp_fsf_close_unit(struct zfcp_erp_action *); - -extern int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *); -extern int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *, - struct fsf_qtcb_bottom_config *); -extern int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *); -extern int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *, - struct fsf_qtcb_bottom_port *); -extern int zfcp_fsf_control_file(struct zfcp_adapter *, struct zfcp_fsf_req **, - u32, u32, struct zfcp_sg_list *); -extern void zfcp_fsf_start_timer(struct zfcp_fsf_req *, unsigned long); -extern void zfcp_erp_start_timer(struct zfcp_fsf_req *); -extern void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *); -extern int zfcp_fsf_status_read(struct zfcp_adapter *, int); -extern int zfcp_fsf_req_create(struct zfcp_adapter *, u32, int, mempool_t *, - unsigned long *, struct zfcp_fsf_req **); -extern int zfcp_fsf_send_ct(struct zfcp_send_ct *, mempool_t *, - struct zfcp_erp_action *); -extern int zfcp_fsf_send_els(struct zfcp_send_els *); -extern int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *, - struct zfcp_unit *, - struct scsi_cmnd *, int, int); -extern int zfcp_fsf_req_complete(struct zfcp_fsf_req *); -extern void zfcp_fsf_incoming_els(struct zfcp_fsf_req *); -extern void zfcp_fsf_req_free(struct zfcp_fsf_req *); -extern struct zfcp_fsf_req *zfcp_fsf_send_fcp_command_task_management( - struct zfcp_adapter *, struct zfcp_unit *, u8, int); -extern struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command( - unsigned long, struct zfcp_adapter *, struct zfcp_unit *, int); - -/******************************* FC/FCP **************************************/ -extern int zfcp_nameserver_enqueue(struct zfcp_adapter *); -extern int zfcp_ns_gid_pn_request(struct zfcp_erp_action *); -extern int zfcp_check_ct_response(struct ct_hdr *); -extern int zfcp_handle_els_rjt(u32, struct zfcp_ls_rjt_par *); -extern void zfcp_plogi_evaluate(struct zfcp_port *, struct fsf_plogi *); - -/******************************* SCSI ****************************************/ -extern int zfcp_adapter_scsi_register(struct zfcp_adapter *); -extern void zfcp_adapter_scsi_unregister(struct zfcp_adapter *); -extern void zfcp_set_fcp_dl(struct fcp_cmnd_iu *, fcp_dl_t); -extern char *zfcp_get_fcp_rsp_info_ptr(struct fcp_rsp_iu *); -extern void set_host_byte(int *, char); -extern void set_driver_byte(int *, char); -extern char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *); -extern fcp_dl_t zfcp_get_fcp_dl(struct fcp_cmnd_iu *); - -extern int zfcp_scsi_command_async(struct zfcp_adapter *,struct zfcp_unit *, - struct scsi_cmnd *, int); -extern int zfcp_scsi_command_sync(struct zfcp_unit *, struct scsi_cmnd *, int); -extern struct fc_function_template zfcp_transport_functions; - -/******************************** ERP ****************************************/ -extern void zfcp_erp_modify_adapter_status(struct zfcp_adapter *, u8, void *, - u32, int); -extern int zfcp_erp_adapter_reopen(struct zfcp_adapter *, int, u8, void *); -extern int zfcp_erp_adapter_shutdown(struct zfcp_adapter *, int, u8, void *); -extern void zfcp_erp_adapter_failed(struct zfcp_adapter *, u8, void *); - -extern void zfcp_erp_modify_port_status(struct zfcp_port *, u8, void *, u32, - int); -extern int zfcp_erp_port_reopen(struct zfcp_port *, int, u8, void *); -extern int zfcp_erp_port_shutdown(struct zfcp_port *, int, u8, void *); -extern int zfcp_erp_port_forced_reopen(struct zfcp_port *, int, u8, void *); -extern void zfcp_erp_port_failed(struct zfcp_port *, u8, void *); -extern int zfcp_erp_port_reopen_all(struct zfcp_adapter *, int, u8, void *); - -extern void zfcp_erp_modify_unit_status(struct zfcp_unit *, u8, void *, u32, - int); -extern int zfcp_erp_unit_reopen(struct zfcp_unit *, int, u8, void *); -extern int zfcp_erp_unit_shutdown(struct zfcp_unit *, int, u8, void *); -extern void zfcp_erp_unit_failed(struct zfcp_unit *, u8, void *); - -extern int zfcp_erp_thread_setup(struct zfcp_adapter *); -extern int zfcp_erp_thread_kill(struct zfcp_adapter *); -extern int zfcp_erp_wait(struct zfcp_adapter *); -extern void zfcp_erp_async_handler(struct zfcp_erp_action *, unsigned long); - -extern int zfcp_test_link(struct zfcp_port *); - -extern void zfcp_erp_port_boxed(struct zfcp_port *, u8 id, void *ref); -extern void zfcp_erp_unit_boxed(struct zfcp_unit *, u8 id, void *ref); -extern void zfcp_erp_port_access_denied(struct zfcp_port *, u8 id, void *ref); -extern void zfcp_erp_unit_access_denied(struct zfcp_unit *, u8 id, void *ref); -extern void zfcp_erp_adapter_access_changed(struct zfcp_adapter *, u8, void *); -extern void zfcp_erp_port_access_changed(struct zfcp_port *, u8, void *); -extern void zfcp_erp_unit_access_changed(struct zfcp_unit *, u8, void *); - -/******************************** AUX ****************************************/ -extern void zfcp_rec_dbf_event_thread(u8 id, struct zfcp_adapter *adapter, - int lock); -extern void zfcp_rec_dbf_event_adapter(u8 id, void *ref, struct zfcp_adapter *); -extern void zfcp_rec_dbf_event_port(u8 id, void *ref, struct zfcp_port *port); -extern void zfcp_rec_dbf_event_unit(u8 id, void *ref, struct zfcp_unit *unit); -extern void zfcp_rec_dbf_event_trigger(u8 id, void *ref, u8 want, u8 need, - void *action, struct zfcp_adapter *, +extern void zfcp_unit_dequeue(struct zfcp_unit *); +extern int zfcp_reqlist_isempty(struct zfcp_adapter *); +extern void zfcp_sg_free_table(struct scatterlist *, int); +extern int zfcp_sg_setup_table(struct scatterlist *, int); + +/* zfcp_ccw.c */ +extern int zfcp_ccw_register(void); + +/* zfcp_cfdc.c */ +extern struct miscdevice zfcp_cfdc_misc; + +/* zfcp_dbf.c */ +extern int zfcp_adapter_debug_register(struct zfcp_adapter *); +extern void zfcp_adapter_debug_unregister(struct zfcp_adapter *); +extern void zfcp_rec_dbf_event_thread(u8, struct zfcp_adapter *); +extern void zfcp_rec_dbf_event_thread_lock(u8, struct zfcp_adapter *); +extern void zfcp_rec_dbf_event_adapter(u8, void *, struct zfcp_adapter *); +extern void zfcp_rec_dbf_event_port(u8, void *, struct zfcp_port *); +extern void zfcp_rec_dbf_event_unit(u8, void *, struct zfcp_unit *); +extern void zfcp_rec_dbf_event_trigger(u8, void *, u8, u8, void *, + struct zfcp_adapter *, struct zfcp_port *, struct zfcp_unit *); -extern void zfcp_rec_dbf_event_action(u8 id, struct zfcp_erp_action *); - +extern void zfcp_rec_dbf_event_action(u8, struct zfcp_erp_action *); extern void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *); extern void zfcp_hba_dbf_event_fsf_unsol(const char *, struct zfcp_adapter *, struct fsf_status_read_buffer *); extern void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *, unsigned int, unsigned int, unsigned int, int, int); - extern void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *); extern void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *); extern void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *); extern void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *); extern void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *); - extern void zfcp_scsi_dbf_event_result(const char *, int, struct zfcp_adapter *, struct scsi_cmnd *, struct zfcp_fsf_req *); @@ -198,6 +64,101 @@ extern void zfcp_scsi_dbf_event_abort(const char *, struct zfcp_adapter *, unsigned long); extern void zfcp_scsi_dbf_event_devreset(const char *, u8, struct zfcp_unit *, struct scsi_cmnd *); -extern int zfcp_reqlist_isempty(struct zfcp_adapter *); + +/* zfcp_erp.c */ +extern void zfcp_erp_modify_adapter_status(struct zfcp_adapter *, u8, void *, + u32, int); +extern void zfcp_erp_adapter_reopen(struct zfcp_adapter *, int, u8, void *); +extern void zfcp_erp_adapter_shutdown(struct zfcp_adapter *, int, u8, void *); +extern void zfcp_erp_adapter_failed(struct zfcp_adapter *, u8, void *); +extern void zfcp_erp_modify_port_status(struct zfcp_port *, u8, void *, u32, + int); +extern int zfcp_erp_port_reopen(struct zfcp_port *, int, u8, void *); +extern void zfcp_erp_port_shutdown(struct zfcp_port *, int, u8, void *); +extern void zfcp_erp_port_forced_reopen(struct zfcp_port *, int, u8, void *); +extern void zfcp_erp_port_failed(struct zfcp_port *, u8, void *); +extern void zfcp_erp_modify_unit_status(struct zfcp_unit *, u8, void *, u32, + int); +extern void zfcp_erp_unit_reopen(struct zfcp_unit *, int, u8, void *); +extern void zfcp_erp_unit_shutdown(struct zfcp_unit *, int, u8, void *); +extern void zfcp_erp_unit_failed(struct zfcp_unit *, u8, void *); +extern int zfcp_erp_thread_setup(struct zfcp_adapter *); +extern void zfcp_erp_thread_kill(struct zfcp_adapter *); +extern void zfcp_erp_wait(struct zfcp_adapter *); +extern void zfcp_erp_notify(struct zfcp_erp_action *, unsigned long); +extern void zfcp_erp_port_boxed(struct zfcp_port *, u8, void *); +extern void zfcp_erp_unit_boxed(struct zfcp_unit *, u8, void *); +extern void zfcp_erp_port_access_denied(struct zfcp_port *, u8, void *); +extern void zfcp_erp_unit_access_denied(struct zfcp_unit *, u8, void *); +extern void zfcp_erp_adapter_access_changed(struct zfcp_adapter *, u8, void *); +extern void zfcp_erp_timeout_handler(unsigned long); + +/* zfcp_fc.c */ +extern int zfcp_scan_ports(struct zfcp_adapter *); +extern void _zfcp_scan_ports_later(struct work_struct *); +extern void zfcp_fc_incoming_els(struct zfcp_fsf_req *); +extern int zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *); +extern void zfcp_fc_plogi_evaluate(struct zfcp_port *, struct fsf_plogi *); +extern void zfcp_test_link(struct zfcp_port *); + +/* zfcp_fsf.c */ +extern int zfcp_fsf_open_port(struct zfcp_erp_action *); +extern int zfcp_fsf_close_port(struct zfcp_erp_action *); +extern int zfcp_fsf_close_physical_port(struct zfcp_erp_action *); +extern int zfcp_fsf_open_unit(struct zfcp_erp_action *); +extern int zfcp_fsf_close_unit(struct zfcp_erp_action *); +extern int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *); +extern int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *, + struct fsf_qtcb_bottom_config *); +extern int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *); +extern int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *, + struct fsf_qtcb_bottom_port *); +extern struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *, + struct zfcp_fsf_cfdc *); +extern void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *); +extern int zfcp_fsf_status_read(struct zfcp_adapter *); +extern int zfcp_status_read_refill(struct zfcp_adapter *adapter); +extern int zfcp_fsf_send_ct(struct zfcp_send_ct *, mempool_t *, + struct zfcp_erp_action *); +extern int zfcp_fsf_send_els(struct zfcp_send_els *); +extern int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *, + struct zfcp_unit *, + struct scsi_cmnd *, int, int); +extern void zfcp_fsf_req_complete(struct zfcp_fsf_req *); +extern void zfcp_fsf_req_free(struct zfcp_fsf_req *); +extern struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *, + struct zfcp_unit *, u8, int); +extern struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long, + struct zfcp_adapter *, + struct zfcp_unit *, int); + +/* zfcp_qdio.c */ +extern int zfcp_qdio_allocate(struct zfcp_adapter *); +extern void zfcp_qdio_free(struct zfcp_adapter *); +extern int zfcp_qdio_send(struct zfcp_fsf_req *); +extern volatile struct qdio_buffer_element *zfcp_qdio_sbale_req( + struct zfcp_fsf_req *); +extern volatile struct qdio_buffer_element *zfcp_qdio_sbale_curr( + struct zfcp_fsf_req *); +extern int zfcp_qdio_sbals_from_sg(struct zfcp_fsf_req *, unsigned long, + struct scatterlist *, int); +extern int zfcp_qdio_open(struct zfcp_adapter *); +extern void zfcp_qdio_close(struct zfcp_adapter *); + +/* zfcp_scsi.c */ +extern struct zfcp_data zfcp_data; +extern int zfcp_adapter_scsi_register(struct zfcp_adapter *); +extern void zfcp_adapter_scsi_unregister(struct zfcp_adapter *); +extern void zfcp_set_fcp_dl(struct fcp_cmnd_iu *, fcp_dl_t); +extern char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *); +extern struct fc_function_template zfcp_transport_functions; + +/* zfcp_sysfs.c */ +extern struct attribute_group zfcp_sysfs_unit_attrs; +extern struct attribute_group zfcp_sysfs_adapter_attrs; +extern struct attribute_group zfcp_sysfs_ns_port_attrs; +extern struct attribute_group zfcp_sysfs_port_attrs; +extern struct device_attribute *zfcp_sysfs_sdev_attrs[]; +extern struct device_attribute *zfcp_sysfs_shost_attrs[]; #endif /* ZFCP_EXT_H */ diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c new file mode 100644 index 00000000000..e984469bb98 --- /dev/null +++ b/drivers/s390/scsi/zfcp_fc.c @@ -0,0 +1,567 @@ +/* + * zfcp device driver + * + * Fibre Channel related functions for the zfcp device driver. + * + * Copyright IBM Corporation 2008 + */ + +#include "zfcp_ext.h" + +struct ct_iu_gpn_ft_req { + struct ct_hdr header; + u8 flags; + u8 domain_id_scope; + u8 area_id_scope; + u8 fc4_type; +} __attribute__ ((packed)); + +struct gpn_ft_resp_acc { + u8 control; + u8 port_id[3]; + u8 reserved[4]; + u64 wwpn; +} __attribute__ ((packed)); + +#define ZFCP_GPN_FT_ENTRIES ((PAGE_SIZE - sizeof(struct ct_hdr)) \ + / sizeof(struct gpn_ft_resp_acc)) +#define ZFCP_GPN_FT_BUFFERS 4 +#define ZFCP_GPN_FT_MAX_ENTRIES ZFCP_GPN_FT_BUFFERS * (ZFCP_GPN_FT_ENTRIES + 1) + +struct ct_iu_gpn_ft_resp { + struct ct_hdr header; + struct gpn_ft_resp_acc accept[ZFCP_GPN_FT_ENTRIES]; +} __attribute__ ((packed)); + +struct zfcp_gpn_ft { + struct zfcp_send_ct ct; + struct scatterlist sg_req; + struct scatterlist sg_resp[ZFCP_GPN_FT_BUFFERS]; +}; + +static struct zfcp_port *zfcp_get_port_by_did(struct zfcp_adapter *adapter, + u32 d_id) +{ + struct zfcp_port *port; + + list_for_each_entry(port, &adapter->port_list_head, list) + if ((port->d_id == d_id) && + !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) + return port; + return NULL; +} + +static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range, + struct fcp_rscn_element *elem) +{ + unsigned long flags; + struct zfcp_port *port; + + read_lock_irqsave(&zfcp_data.config_lock, flags); + list_for_each_entry(port, &fsf_req->adapter->port_list_head, list) { + if (atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status)) + continue; + /* FIXME: ZFCP_STATUS_PORT_DID_DID check is racy */ + if (!atomic_test_mask(ZFCP_STATUS_PORT_DID_DID, &port->status)) + /* Try to connect to unused ports anyway. */ + zfcp_erp_port_reopen(port, + ZFCP_STATUS_COMMON_ERP_FAILED, + 82, fsf_req); + else if ((port->d_id & range) == (elem->nport_did & range)) + /* Check connection status for connected ports */ + zfcp_test_link(port); + } + read_unlock_irqrestore(&zfcp_data.config_lock, flags); +} + +static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req) +{ + struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data; + struct fcp_rscn_head *fcp_rscn_head; + struct fcp_rscn_element *fcp_rscn_element; + u16 i; + u16 no_entries; + u32 range_mask; + + fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload.data; + fcp_rscn_element = (struct fcp_rscn_element *) fcp_rscn_head; + + /* see FC-FS */ + no_entries = fcp_rscn_head->payload_len / + sizeof(struct fcp_rscn_element); + + for (i = 1; i < no_entries; i++) { + /* skip head and start with 1st element */ + fcp_rscn_element++; + switch (fcp_rscn_element->addr_format) { + case ZFCP_PORT_ADDRESS: + range_mask = ZFCP_PORTS_RANGE_PORT; + break; + case ZFCP_AREA_ADDRESS: + range_mask = ZFCP_PORTS_RANGE_AREA; + break; + case ZFCP_DOMAIN_ADDRESS: + range_mask = ZFCP_PORTS_RANGE_DOMAIN; + break; + case ZFCP_FABRIC_ADDRESS: + range_mask = ZFCP_PORTS_RANGE_FABRIC; + break; + default: + continue; + } + _zfcp_fc_incoming_rscn(fsf_req, range_mask, fcp_rscn_element); + } + schedule_work(&fsf_req->adapter->scan_work); +} + +static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, wwn_t wwpn) +{ + struct zfcp_adapter *adapter = req->adapter; + struct zfcp_port *port; + unsigned long flags; + + read_lock_irqsave(&zfcp_data.config_lock, flags); + list_for_each_entry(port, &adapter->port_list_head, list) + if (port->wwpn == wwpn) + break; + read_unlock_irqrestore(&zfcp_data.config_lock, flags); + + if (port && (port->wwpn == wwpn)) + zfcp_erp_port_forced_reopen(port, 0, 83, req); +} + +static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req) +{ + struct fsf_status_read_buffer *status_buffer = + (struct fsf_status_read_buffer *)req->data; + struct fsf_plogi *els_plogi = + (struct fsf_plogi *) status_buffer->payload.data; + + zfcp_fc_incoming_wwpn(req, els_plogi->serv_param.wwpn); +} + +static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req) +{ + struct fsf_status_read_buffer *status_buffer = + (struct fsf_status_read_buffer *)req->data; + struct fcp_logo *els_logo = + (struct fcp_logo *) status_buffer->payload.data; + + zfcp_fc_incoming_wwpn(req, els_logo->nport_wwpn); +} + +/** + * zfcp_fc_incoming_els - handle incoming ELS + * @fsf_req - request which contains incoming ELS + */ +void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req) +{ + struct fsf_status_read_buffer *status_buffer = + (struct fsf_status_read_buffer *) fsf_req->data; + unsigned int els_type = status_buffer->payload.data[0]; + + zfcp_san_dbf_event_incoming_els(fsf_req); + if (els_type == LS_PLOGI) + zfcp_fc_incoming_plogi(fsf_req); + else if (els_type == LS_LOGO) + zfcp_fc_incoming_logo(fsf_req); + else if (els_type == LS_RSCN) + zfcp_fc_incoming_rscn(fsf_req); +} + +static void zfcp_ns_gid_pn_handler(unsigned long data) +{ + struct zfcp_gid_pn_data *gid_pn = (struct zfcp_gid_pn_data *) data; + struct zfcp_send_ct *ct = &gid_pn->ct; + struct ct_iu_gid_pn_req *ct_iu_req = sg_virt(ct->req); + struct ct_iu_gid_pn_resp *ct_iu_resp = sg_virt(ct->resp); + struct zfcp_port *port = gid_pn->port; + + if (ct->status) + goto out; + if (ct_iu_resp->header.cmd_rsp_code != ZFCP_CT_ACCEPT) { + atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status); + goto out; + } + /* paranoia */ + if (ct_iu_req->wwpn != port->wwpn) + goto out; + /* looks like a valid d_id */ + port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK; + atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status); +out: + mempool_free(gid_pn, port->adapter->pool.data_gid_pn); +} + +/** + * zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request + * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed + * return: -ENOMEM on error, 0 otherwise + */ +int zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *erp_action) +{ + int ret; + struct zfcp_gid_pn_data *gid_pn; + struct zfcp_adapter *adapter = erp_action->adapter; + + gid_pn = mempool_alloc(adapter->pool.data_gid_pn, GFP_ATOMIC); + if (!gid_pn) + return -ENOMEM; + + memset(gid_pn, 0, sizeof(*gid_pn)); + + /* setup parameters for send generic command */ + gid_pn->port = erp_action->port; + gid_pn->ct.port = adapter->nameserver_port; + gid_pn->ct.handler = zfcp_ns_gid_pn_handler; + gid_pn->ct.handler_data = (unsigned long) gid_pn; + gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT; + gid_pn->ct.req = &gid_pn->req; + gid_pn->ct.resp = &gid_pn->resp; + gid_pn->ct.req_count = 1; + gid_pn->ct.resp_count = 1; + sg_init_one(&gid_pn->req, &gid_pn->ct_iu_req, + sizeof(struct ct_iu_gid_pn_req)); + sg_init_one(&gid_pn->resp, &gid_pn->ct_iu_resp, + sizeof(struct ct_iu_gid_pn_resp)); + + /* setup nameserver request */ + gid_pn->ct_iu_req.header.revision = ZFCP_CT_REVISION; + gid_pn->ct_iu_req.header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; + gid_pn->ct_iu_req.header.gs_subtype = ZFCP_CT_NAME_SERVER; + gid_pn->ct_iu_req.header.options = ZFCP_CT_SYNCHRONOUS; + gid_pn->ct_iu_req.header.cmd_rsp_code = ZFCP_CT_GID_PN; + gid_pn->ct_iu_req.header.max_res_size = ZFCP_CT_MAX_SIZE; + gid_pn->ct_iu_req.wwpn = erp_action->port->wwpn; + + ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp, + erp_action); + if (ret) + mempool_free(gid_pn, adapter->pool.data_gid_pn); + return ret; +} + +/** + * zfcp_fc_plogi_evaluate - evaluate PLOGI playload + * @port: zfcp_port structure + * @plogi: plogi payload + * + * Evaluate PLOGI playload and copy important fields into zfcp_port structure + */ +void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi) +{ + port->maxframe_size = plogi->serv_param.common_serv_param[7] | + ((plogi->serv_param.common_serv_param[6] & 0x0F) << 8); + if (plogi->serv_param.class1_serv_param[0] & 0x80) + port->supported_classes |= FC_COS_CLASS1; + if (plogi->serv_param.class2_serv_param[0] & 0x80) + port->supported_classes |= FC_COS_CLASS2; + if (plogi->serv_param.class3_serv_param[0] & 0x80) + port->supported_classes |= FC_COS_CLASS3; + if (plogi->serv_param.class4_serv_param[0] & 0x80) + port->supported_classes |= FC_COS_CLASS4; +} + +struct zfcp_els_adisc { + struct zfcp_send_els els; + struct scatterlist req; + struct scatterlist resp; + struct zfcp_ls_adisc ls_adisc; + struct zfcp_ls_adisc_acc ls_adisc_acc; +}; + +static void zfcp_fc_adisc_handler(unsigned long data) +{ + struct zfcp_els_adisc *adisc = (struct zfcp_els_adisc *) data; + struct zfcp_port *port = adisc->els.port; + struct zfcp_ls_adisc_acc *ls_adisc = &adisc->ls_adisc_acc; + + if (adisc->els.status) { + /* request rejected or timed out */ + zfcp_erp_port_forced_reopen(port, 0, 63, NULL); + goto out; + } + + if (!port->wwnn) + port->wwnn = ls_adisc->wwnn; + + if (port->wwpn != ls_adisc->wwpn) + zfcp_erp_port_reopen(port, 0, 64, NULL); + + out: + zfcp_port_put(port); + kfree(adisc); +} + +static int zfcp_fc_adisc(struct zfcp_port *port) +{ + struct zfcp_els_adisc *adisc; + struct zfcp_adapter *adapter = port->adapter; + + adisc = kzalloc(sizeof(struct zfcp_els_adisc), GFP_ATOMIC); + if (!adisc) + return -ENOMEM; + + adisc->els.req = &adisc->req; + adisc->els.resp = &adisc->resp; + sg_init_one(adisc->els.req, &adisc->ls_adisc, + sizeof(struct zfcp_ls_adisc)); + sg_init_one(adisc->els.resp, &adisc->ls_adisc_acc, + sizeof(struct zfcp_ls_adisc_acc)); + + adisc->els.req_count = 1; + adisc->els.resp_count = 1; + adisc->els.adapter = adapter; + adisc->els.port = port; + adisc->els.d_id = port->d_id; + adisc->els.handler = zfcp_fc_adisc_handler; + adisc->els.handler_data = (unsigned long) adisc; + adisc->els.ls_code = adisc->ls_adisc.code = ZFCP_LS_ADISC; + + /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports + without FC-AL-2 capability, so we don't set it */ + adisc->ls_adisc.wwpn = fc_host_port_name(adapter->scsi_host); + adisc->ls_adisc.wwnn = fc_host_node_name(adapter->scsi_host); + adisc->ls_adisc.nport_id = fc_host_port_id(adapter->scsi_host); + + return zfcp_fsf_send_els(&adisc->els); +} + +/** + * zfcp_test_link - lightweight link test procedure + * @port: port to be tested + * + * Test status of a link to a remote port using the ELS command ADISC. + * If there is a problem with the remote port, error recovery steps + * will be triggered. + */ +void zfcp_test_link(struct zfcp_port *port) +{ + int retval; + + zfcp_port_get(port); + retval = zfcp_fc_adisc(port); + if (retval == 0 || retval == -EBUSY) + return; + + /* send of ADISC was not possible */ + zfcp_port_put(port); + zfcp_erp_port_forced_reopen(port, 0, 65, NULL); +} + +static int zfcp_scan_get_nameserver(struct zfcp_adapter *adapter) +{ + int ret; + + if (!adapter->nameserver_port) + return -EINTR; + + if (!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, + &adapter->nameserver_port->status)) { + ret = zfcp_erp_port_reopen(adapter->nameserver_port, 0, 148, + NULL); + if (ret) + return ret; + zfcp_erp_wait(adapter); + zfcp_port_put(adapter->nameserver_port); + } + return !atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, + &adapter->nameserver_port->status); +} + +static void zfcp_gpn_ft_handler(unsigned long _done) +{ + complete((struct completion *)_done); +} + +static void zfcp_free_sg_env(struct zfcp_gpn_ft *gpn_ft) +{ + struct scatterlist *sg = &gpn_ft->sg_req; + + kfree(sg_virt(sg)); /* free request buffer */ + zfcp_sg_free_table(gpn_ft->sg_resp, ZFCP_GPN_FT_BUFFERS); + + kfree(gpn_ft); +} + +static struct zfcp_gpn_ft *zfcp_alloc_sg_env(void) +{ + struct zfcp_gpn_ft *gpn_ft; + struct ct_iu_gpn_ft_req *req; + + gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL); + if (!gpn_ft) + return NULL; + + req = kzalloc(sizeof(struct ct_iu_gpn_ft_req), GFP_KERNEL); + if (!req) { + kfree(gpn_ft); + gpn_ft = NULL; + goto out; + } + sg_init_one(&gpn_ft->sg_req, req, sizeof(*req)); + + if (zfcp_sg_setup_table(gpn_ft->sg_resp, ZFCP_GPN_FT_BUFFERS)) { + zfcp_free_sg_env(gpn_ft); + gpn_ft = NULL; + } +out: + return gpn_ft; +} + + +static int zfcp_scan_issue_gpn_ft(struct zfcp_gpn_ft *gpn_ft, + struct zfcp_adapter *adapter) +{ + struct zfcp_send_ct *ct = &gpn_ft->ct; + struct ct_iu_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req); + struct completion done; + int ret; + + /* prepare CT IU for GPN_FT */ + req->header.revision = ZFCP_CT_REVISION; + req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; + req->header.gs_subtype = ZFCP_CT_NAME_SERVER; + req->header.options = ZFCP_CT_SYNCHRONOUS; + req->header.cmd_rsp_code = ZFCP_CT_GPN_FT; + req->header.max_res_size = (sizeof(struct gpn_ft_resp_acc) * + (ZFCP_GPN_FT_MAX_ENTRIES - 1)) >> 2; + req->flags = 0; + req->domain_id_scope = 0; + req->area_id_scope = 0; + req->fc4_type = ZFCP_CT_SCSI_FCP; + + /* prepare zfcp_send_ct */ + ct->port = adapter->nameserver_port; + ct->handler = zfcp_gpn_ft_handler; + ct->handler_data = (unsigned long)&done; + ct->timeout = 10; + ct->req = &gpn_ft->sg_req; + ct->resp = gpn_ft->sg_resp; + ct->req_count = 1; + ct->resp_count = ZFCP_GPN_FT_BUFFERS; + + init_completion(&done); + ret = zfcp_fsf_send_ct(ct, NULL, NULL); + if (!ret) + wait_for_completion(&done); + return ret; +} + +static void zfcp_validate_port(struct zfcp_port *port) +{ + struct zfcp_adapter *adapter = port->adapter; + + atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status); + + if (port == adapter->nameserver_port) + return; + if ((port->supported_classes != 0) || (port->units != 0)) { + zfcp_port_put(port); + return; + } + zfcp_erp_port_shutdown(port, 0, 151, NULL); + zfcp_erp_wait(adapter); + zfcp_port_put(port); + zfcp_port_dequeue(port); +} + +static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft) +{ + struct zfcp_send_ct *ct = &gpn_ft->ct; + struct scatterlist *sg = gpn_ft->sg_resp; + struct ct_hdr *hdr = sg_virt(sg); + struct gpn_ft_resp_acc *acc = sg_virt(sg); + struct zfcp_adapter *adapter = ct->port->adapter; + struct zfcp_port *port, *tmp; + u32 d_id; + int ret = 0, x; + + if (ct->status) + return -EIO; + + if (hdr->cmd_rsp_code != ZFCP_CT_ACCEPT) { + if (hdr->reason_code == ZFCP_CT_UNABLE_TO_PERFORM_CMD) + return -EAGAIN; /* might be a temporary condition */ + return -EIO; + } + + if (hdr->max_res_size) + return -E2BIG; + + down(&zfcp_data.config_sema); + + /* first entry is the header */ + for (x = 1; x < ZFCP_GPN_FT_MAX_ENTRIES; x++) { + if (x % (ZFCP_GPN_FT_ENTRIES + 1)) + acc++; + else + acc = sg_virt(++sg); + + d_id = acc->port_id[0] << 16 | acc->port_id[1] << 8 | + acc->port_id[2]; + + /* skip the adapter's port and known remote ports */ + if (acc->wwpn == fc_host_port_name(adapter->scsi_host) || + zfcp_get_port_by_did(adapter, d_id)) + continue; + + port = zfcp_port_enqueue(adapter, acc->wwpn, + ZFCP_STATUS_PORT_DID_DID | + ZFCP_STATUS_COMMON_NOESC, d_id); + if (IS_ERR(port)) + ret = PTR_ERR(port); + else + zfcp_erp_port_reopen(port, 0, 149, NULL); + if (acc->control & 0x80) /* last entry */ + break; + } + + zfcp_erp_wait(adapter); + list_for_each_entry_safe(port, tmp, &adapter->port_list_head, list) + zfcp_validate_port(port); + up(&zfcp_data.config_sema); + return ret; +} + +/** + * zfcp_scan_ports - scan remote ports and attach new ports + * @adapter: pointer to struct zfcp_adapter + */ +int zfcp_scan_ports(struct zfcp_adapter *adapter) +{ + int ret, i; + struct zfcp_gpn_ft *gpn_ft; + + zfcp_erp_wait(adapter); /* wait until adapter is finished with ERP */ + if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT) + return 0; + + ret = zfcp_scan_get_nameserver(adapter); + if (ret) + return ret; + + gpn_ft = zfcp_alloc_sg_env(); + if (!gpn_ft) + return -ENOMEM; + + for (i = 0; i < 3; i++) { + ret = zfcp_scan_issue_gpn_ft(gpn_ft, adapter); + if (!ret) { + ret = zfcp_scan_eval_gpn_ft(gpn_ft); + if (ret == -EAGAIN) + ssleep(1); + else + break; + } + } + zfcp_free_sg_env(gpn_ft); + + return ret; +} + + +void _zfcp_scan_ports_later(struct work_struct *work) +{ + zfcp_scan_ports(container_of(work, struct zfcp_adapter, scan_work)); +} diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c index b2ea4ea051f..19c1ca91387 100644 --- a/drivers/s390/scsi/zfcp_fsf.c +++ b/drivers/s390/scsi/zfcp_fsf.c @@ -1,54 +1,37 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Implementation of FSF commands. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ #include "zfcp_ext.h" -static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *); -static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_send_fcp_command_task_management_handler( - struct zfcp_fsf_req *); -static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_control_file_handler(struct zfcp_fsf_req *); -static inline int zfcp_fsf_req_sbal_check( - unsigned long *, struct zfcp_qdio_queue *, int); -static inline int zfcp_use_one_sbal( - struct scatterlist *, int, struct scatterlist *, int); -static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int); -static int zfcp_fsf_req_send(struct zfcp_fsf_req *); -static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *); -static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *); -static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *); -static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *, u8, - struct fsf_link_down_info *); -static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *); +static void zfcp_fsf_request_timeout_handler(unsigned long data) +{ + struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; + zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 62, + NULL); +} + +static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req, + unsigned long timeout) +{ + fsf_req->timer.function = zfcp_fsf_request_timeout_handler; + fsf_req->timer.data = (unsigned long) fsf_req->adapter; + fsf_req->timer.expires = jiffies + timeout; + add_timer(&fsf_req->timer); +} + +static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req) +{ + BUG_ON(!fsf_req->erp_action); + fsf_req->timer.function = zfcp_erp_timeout_handler; + fsf_req->timer.data = (unsigned long) fsf_req->erp_action; + fsf_req->timer.expires = jiffies + 30 * HZ; + add_timer(&fsf_req->timer); +} /* association between FSF command and FSF QTCB type */ static u32 fsf_qtcb_type[] = { @@ -67,96 +50,77 @@ static u32 fsf_qtcb_type[] = { [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND }; -static const char zfcp_act_subtable_type[5][8] = { +static const char *zfcp_act_subtable_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" }; -/****************************************************************/ -/*************** FSF related Functions *************************/ -/****************************************************************/ - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF - -/* - * function: zfcp_fsf_req_alloc - * - * purpose: Obtains an fsf_req and potentially a qtcb (for all but - * unsolicited requests) via helper functions - * Does some initial fsf request set-up. - * - * returns: pointer to allocated fsf_req if successfull - * NULL otherwise - * - * locks: none - * - */ -static struct zfcp_fsf_req * -zfcp_fsf_req_alloc(mempool_t *pool, int req_flags) +static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table) { - size_t size; - void *ptr; - struct zfcp_fsf_req *fsf_req = NULL; + u16 subtable = table >> 16; + u16 rule = table & 0xffff; - if (req_flags & ZFCP_REQ_NO_QTCB) - size = sizeof(struct zfcp_fsf_req); - else - size = sizeof(struct zfcp_fsf_req_qtcb); - - if (likely(pool)) - ptr = mempool_alloc(pool, GFP_ATOMIC); - else { - if (req_flags & ZFCP_REQ_NO_QTCB) - ptr = kmalloc(size, GFP_ATOMIC); - else - ptr = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache, - GFP_ATOMIC); - } - - if (unlikely(!ptr)) - goto out; - - memset(ptr, 0, size); + if (subtable && subtable < ARRAY_SIZE(zfcp_act_subtable_type)) + dev_warn(&adapter->ccw_device->dev, + "Access denied in subtable %s, rule %d.\n", + zfcp_act_subtable_type[subtable], rule); +} - if (req_flags & ZFCP_REQ_NO_QTCB) { - fsf_req = (struct zfcp_fsf_req *) ptr; - } else { - fsf_req = &((struct zfcp_fsf_req_qtcb *) ptr)->fsf_req; - fsf_req->qtcb = &((struct zfcp_fsf_req_qtcb *) ptr)->qtcb; - } +static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req, + struct zfcp_port *port) +{ + struct fsf_qtcb_header *header = &req->qtcb->header; + dev_warn(&req->adapter->ccw_device->dev, + "Access denied, cannot send command to port 0x%016Lx.\n", + port->wwpn); + zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]); + zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]); + zfcp_erp_port_access_denied(port, 55, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; +} - fsf_req->pool = pool; +static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req, + struct zfcp_unit *unit) +{ + struct fsf_qtcb_header *header = &req->qtcb->header; + dev_warn(&req->adapter->ccw_device->dev, + "Access denied for unit 0x%016Lx on port 0x%016Lx.\n", + unit->fcp_lun, unit->port->wwpn); + zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]); + zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]); + zfcp_erp_unit_access_denied(unit, 59, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; +} - out: - return fsf_req; +static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req) +{ + dev_err(&req->adapter->ccw_device->dev, + "Required FC class not supported by adapter, " + "shutting down adapter.\n"); + zfcp_erp_adapter_shutdown(req->adapter, 0, 123, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; } -/* - * function: zfcp_fsf_req_free - * - * purpose: Frees the memory of an fsf_req (and potentially a qtcb) or - * returns it into the pool via helper functions. - * - * returns: sod all - * - * locks: none +/** + * zfcp_fsf_req_free - free memory used by fsf request + * @fsf_req: pointer to struct zfcp_fsf_req */ -void -zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req) +void zfcp_fsf_req_free(struct zfcp_fsf_req *req) { - if (likely(fsf_req->pool)) { - mempool_free(fsf_req, fsf_req->pool); + if (likely(req->pool)) { + mempool_free(req, req->pool); return; } - if (fsf_req->qtcb) { - kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, fsf_req); + if (req->qtcb) { + kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req); return; } - - kfree(fsf_req); } -/* +/** + * zfcp_fsf_req_dismiss_all - dismiss all fsf requests + * @adapter: pointer to struct zfcp_adapter + * * Never ever call this without shutting down the adapter first. * Otherwise the adapter would continue using and corrupting s390 storage. * Included BUG_ON() call to ensure this is done. @@ -164,2353 +128,1359 @@ zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req) */ void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter) { - struct zfcp_fsf_req *fsf_req, *tmp; + struct zfcp_fsf_req *req, *tmp; unsigned long flags; LIST_HEAD(remove_queue); unsigned int i; - BUG_ON(atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)); + BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP); spin_lock_irqsave(&adapter->req_list_lock, flags); - atomic_set(&adapter->reqs_active, 0); for (i = 0; i < REQUEST_LIST_SIZE; i++) list_splice_init(&adapter->req_list[i], &remove_queue); spin_unlock_irqrestore(&adapter->req_list_lock, flags); - list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) { - list_del(&fsf_req->list); - fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; - zfcp_fsf_req_complete(fsf_req); + list_for_each_entry_safe(req, tmp, &remove_queue, list) { + list_del(&req->list); + req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; + zfcp_fsf_req_complete(req); } } -/* - * function: zfcp_fsf_req_complete - * - * purpose: Updates active counts and timers for openfcp-reqs - * May cleanup request after req_eval returns - * - * returns: 0 - success - * !0 - failure - * - * context: - */ -int -zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req) { - int retval = 0; - int cleanup; - - if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) { - ZFCP_LOG_DEBUG("Status read response received\n"); - /* - * Note: all cleanup handling is done in the callchain of - * the function call-chain below. - */ - zfcp_fsf_status_read_handler(fsf_req); - goto out; - } else { - del_timer(&fsf_req->timer); - zfcp_fsf_protstatus_eval(fsf_req); - } - - /* - * fsf_req may be deleted due to waking up functions, so - * cleanup is saved here and used later - */ - if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP)) - cleanup = 1; - else - cleanup = 0; - - fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED; + struct fsf_status_read_buffer *sr_buf = req->data; + struct zfcp_adapter *adapter = req->adapter; + struct zfcp_port *port; + int d_id = sr_buf->d_id & ZFCP_DID_MASK; + unsigned long flags; - /* cleanup request if requested by initiator */ - if (likely(cleanup)) { - ZFCP_LOG_TRACE("removing FSF request %p\n", fsf_req); - /* - * lock must not be held here since it will be - * grabed by the called routine, too - */ - zfcp_fsf_req_free(fsf_req); - } else { - /* notify initiator waiting for the requests completion */ - ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req); - /* - * FIXME: Race! We must not access fsf_req here as it might have been - * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED - * flag. It's an improbable case. But, we have the same paranoia for - * the cleanup flag already. - * Might better be handled using complete()? - * (setting the flag and doing wakeup ought to be atomic - * with regard to checking the flag as long as waitqueue is - * part of the to be released structure) - */ - wake_up(&fsf_req->completion_wq); - } + read_lock_irqsave(&zfcp_data.config_lock, flags); + list_for_each_entry(port, &adapter->port_list_head, list) + if (port->d_id == d_id) { + read_unlock_irqrestore(&zfcp_data.config_lock, flags); + switch (sr_buf->status_subtype) { + case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT: + zfcp_erp_port_reopen(port, 0, 101, req); + break; + case FSF_STATUS_READ_SUB_ERROR_PORT: + zfcp_erp_port_shutdown(port, 0, 122, req); + break; + } + return; + } + read_unlock_irqrestore(&zfcp_data.config_lock, flags); +} - out: - return retval; +static void zfcp_fsf_bit_error_threshold(struct zfcp_fsf_req *req) +{ + struct zfcp_adapter *adapter = req->adapter; + struct fsf_status_read_buffer *sr_buf = req->data; + struct fsf_bit_error_payload *err = &sr_buf->payload.bit_error; + + dev_warn(&adapter->ccw_device->dev, + "Warning: bit error threshold data " + "received for the adapter: " + "link failures = %i, loss of sync errors = %i, " + "loss of signal errors = %i, " + "primitive sequence errors = %i, " + "invalid transmission word errors = %i, " + "CRC errors = %i).\n", + err->link_failure_error_count, + err->loss_of_sync_error_count, + err->loss_of_signal_error_count, + err->primitive_sequence_error_count, + err->invalid_transmission_word_error_count, + err->crc_error_count); + dev_warn(&adapter->ccw_device->dev, + "Additional bit error threshold data of the adapter: " + "primitive sequence event time-outs = %i, " + "elastic buffer overrun errors = %i, " + "advertised receive buffer-to-buffer credit = %i, " + "current receice buffer-to-buffer credit = %i, " + "advertised transmit buffer-to-buffer credit = %i, " + "current transmit buffer-to-buffer credit = %i).\n", + err->primitive_sequence_event_timeout_count, + err->elastic_buffer_overrun_error_count, + err->advertised_receive_b2b_credit, + err->current_receive_b2b_credit, + err->advertised_transmit_b2b_credit, + err->current_transmit_b2b_credit); } -/* - * function: zfcp_fsf_protstatus_eval - * - * purpose: evaluates the QTCB of the finished FSF request - * and initiates appropriate actions - * (usually calling FSF command specific handlers) - * - * returns: - * - * context: - * - * locks: - */ -static int -zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, u8 id, + struct fsf_link_down_info *link_down) { - int retval = 0; - struct zfcp_adapter *adapter = fsf_req->adapter; - struct fsf_qtcb *qtcb = fsf_req->qtcb; - union fsf_prot_status_qual *prot_status_qual = - &qtcb->prefix.prot_status_qual; - - zfcp_hba_dbf_event_fsf_response(fsf_req); - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { - ZFCP_LOG_DEBUG("fsf_req 0x%lx has been dismissed\n", - (unsigned long) fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | - ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */ - goto skip_protstatus; - } + struct zfcp_adapter *adapter = req->adapter; - /* evaluate FSF Protocol Status */ - switch (qtcb->prefix.prot_status) { + if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) + return; - case FSF_PROT_GOOD: - case FSF_PROT_FSF_STATUS_PRESENTED: - break; + atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status); - case FSF_PROT_QTCB_VERSION_ERROR: - ZFCP_LOG_NORMAL("error: The adapter %s contains " - "microcode of version 0x%x, the device driver " - "only supports 0x%x. Aborting.\n", - zfcp_get_busid_by_adapter(adapter), - prot_status_qual->version_error.fsf_version, - ZFCP_QTCB_VERSION); - zfcp_erp_adapter_shutdown(adapter, 0, 117, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; + if (!link_down) + goto out; - case FSF_PROT_SEQ_NUMB_ERROR: - ZFCP_LOG_NORMAL("bug: Sequence number mismatch between " - "driver (0x%x) and adapter %s (0x%x). " - "Restarting all operations on this adapter.\n", - qtcb->prefix.req_seq_no, - zfcp_get_busid_by_adapter(adapter), - prot_status_qual->sequence_error.exp_req_seq_no); - zfcp_erp_adapter_reopen(adapter, 0, 98, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + switch (link_down->error_code) { + case FSF_PSQ_LINK_NO_LIGHT: + dev_warn(&req->adapter->ccw_device->dev, + "The local link is down: no light detected.\n"); break; - - case FSF_PROT_UNSUPP_QTCB_TYPE: - ZFCP_LOG_NORMAL("error: Packet header type used by the " - "device driver is incompatible with " - "that used on adapter %s. " - "Stopping all operations on this adapter.\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_shutdown(adapter, 0, 118, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + case FSF_PSQ_LINK_WRAP_PLUG: + dev_warn(&req->adapter->ccw_device->dev, + "The local link is down: wrap plug detected.\n"); break; - - case FSF_PROT_HOST_CONNECTION_INITIALIZING: - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, - &(adapter->status)); + case FSF_PSQ_LINK_NO_FCP: + dev_warn(&req->adapter->ccw_device->dev, + "The local link is down: " + "adjacent node on link does not support FCP.\n"); break; - - case FSF_PROT_DUPLICATE_REQUEST_ID: - ZFCP_LOG_NORMAL("bug: The request identifier 0x%Lx " - "to the adapter %s is ambiguous. " - "Stopping all operations on this adapter.\n", - *(unsigned long long*) - (&qtcb->bottom.support.req_handle), - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_shutdown(adapter, 0, 78, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + case FSF_PSQ_LINK_FIRMWARE_UPDATE: + dev_warn(&req->adapter->ccw_device->dev, + "The local link is down: " + "firmware update in progress.\n"); break; - - case FSF_PROT_LINK_DOWN: - zfcp_fsf_link_down_info_eval(fsf_req, 37, - &prot_status_qual->link_down_info); - /* FIXME: reopening adapter now? better wait for link up */ - zfcp_erp_adapter_reopen(adapter, 0, 79, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + case FSF_PSQ_LINK_INVALID_WWPN: + dev_warn(&req->adapter->ccw_device->dev, + "The local link is down: " + "duplicate or invalid WWPN detected.\n"); break; - - case FSF_PROT_REEST_QUEUE: - ZFCP_LOG_NORMAL("The local link to adapter with " - "%s was re-plugged. " - "Re-starting operations on this adapter.\n", - zfcp_get_busid_by_adapter(adapter)); - /* All ports should be marked as ready to run again */ - zfcp_erp_modify_adapter_status(adapter, 28, NULL, - ZFCP_STATUS_COMMON_RUNNING, - ZFCP_SET); - zfcp_erp_adapter_reopen(adapter, - ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED - | ZFCP_STATUS_COMMON_ERP_FAILED, - 99, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + case FSF_PSQ_LINK_NO_NPIV_SUPPORT: + dev_warn(&req->adapter->ccw_device->dev, + "The local link is down: " + "no support for NPIV by Fabric.\n"); break; - - case FSF_PROT_ERROR_STATE: - ZFCP_LOG_NORMAL("error: The adapter %s " - "has entered the error state. " - "Restarting all operations on this " - "adapter.\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_reopen(adapter, 0, 100, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + case FSF_PSQ_LINK_NO_FCP_RESOURCES: + dev_warn(&req->adapter->ccw_device->dev, + "The local link is down: " + "out of resource in FCP daughtercard.\n"); + break; + case FSF_PSQ_LINK_NO_FABRIC_RESOURCES: + dev_warn(&req->adapter->ccw_device->dev, + "The local link is down: " + "out of resource in Fabric.\n"); + break; + case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE: + dev_warn(&req->adapter->ccw_device->dev, + "The local link is down: " + "unable to login to Fabric.\n"); + break; + case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED: + dev_warn(&req->adapter->ccw_device->dev, + "WWPN assignment file corrupted on adapter.\n"); + break; + case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED: + dev_warn(&req->adapter->ccw_device->dev, + "Mode table corrupted on adapter.\n"); + break; + case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT: + dev_warn(&req->adapter->ccw_device->dev, + "No WWPN for assignment table on adapter.\n"); break; - default: - ZFCP_LOG_NORMAL("bug: Transfer protocol status information " - "provided by the adapter %s " - "is not compatible with the device driver. " - "Stopping all operations on this adapter. " - "(debug info 0x%x).\n", - zfcp_get_busid_by_adapter(adapter), - qtcb->prefix.prot_status); - zfcp_erp_adapter_shutdown(adapter, 0, 119, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + dev_warn(&req->adapter->ccw_device->dev, + "The local link to adapter is down.\n"); } +out: + zfcp_erp_adapter_failed(adapter, id, req); +} - skip_protstatus: - /* - * always call specific handlers to give them a chance to do - * something meaningful even in error cases - */ - zfcp_fsf_fsfstatus_eval(fsf_req); - return retval; +static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req) +{ + struct zfcp_adapter *adapter = req->adapter; + struct fsf_status_read_buffer *sr_buf = req->data; + struct fsf_link_down_info *ldi = + (struct fsf_link_down_info *) &sr_buf->payload; + + switch (sr_buf->status_subtype) { + case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK: + dev_warn(&adapter->ccw_device->dev, + "Physical link is down.\n"); + zfcp_fsf_link_down_info_eval(req, 38, ldi); + break; + case FSF_STATUS_READ_SUB_FDISC_FAILED: + dev_warn(&adapter->ccw_device->dev, + "Local link is down " + "due to failed FDISC login.\n"); + zfcp_fsf_link_down_info_eval(req, 39, ldi); + break; + case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE: + dev_warn(&adapter->ccw_device->dev, + "Local link is down " + "due to firmware update on adapter.\n"); + zfcp_fsf_link_down_info_eval(req, 40, NULL); + }; } -/* - * function: zfcp_fsf_fsfstatus_eval - * - * purpose: evaluates FSF status of completed FSF request - * and acts accordingly - * - * returns: - */ -static int -zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req) { - int retval = 0; + struct zfcp_adapter *adapter = req->adapter; + struct fsf_status_read_buffer *sr_buf = req->data; - if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { - goto skip_fsfstatus; + if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { + zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf); + mempool_free(sr_buf, adapter->pool.data_status_read); + zfcp_fsf_req_free(req); + return; } - /* evaluate FSF Status */ - switch (fsf_req->qtcb->header.fsf_status) { - case FSF_UNKNOWN_COMMAND: - ZFCP_LOG_NORMAL("bug: Command issued by the device driver is " - "not known by the adapter %s " - "Stopping all operations on this adapter. " - "(debug info 0x%x).\n", - zfcp_get_busid_by_adapter(fsf_req->adapter), - fsf_req->qtcb->header.fsf_command); - zfcp_erp_adapter_shutdown(fsf_req->adapter, 0, 120, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; + zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf); - case FSF_FCP_RSP_AVAILABLE: - ZFCP_LOG_DEBUG("FCP Sense data will be presented to the " - "SCSI stack.\n"); + switch (sr_buf->status_type) { + case FSF_STATUS_READ_PORT_CLOSED: + zfcp_fsf_status_read_port_closed(req); break; - - case FSF_ADAPTER_STATUS_AVAILABLE: - zfcp_fsf_fsfstatus_qual_eval(fsf_req); + case FSF_STATUS_READ_INCOMING_ELS: + zfcp_fc_incoming_els(req); + break; + case FSF_STATUS_READ_SENSE_DATA_AVAIL: + break; + case FSF_STATUS_READ_BIT_ERROR_THRESHOLD: + zfcp_fsf_bit_error_threshold(req); + break; + case FSF_STATUS_READ_LINK_DOWN: + zfcp_fsf_status_read_link_down(req); + break; + case FSF_STATUS_READ_LINK_UP: + dev_info(&adapter->ccw_device->dev, + "Local link was replugged.\n"); + /* All ports should be marked as ready to run again */ + zfcp_erp_modify_adapter_status(adapter, 30, NULL, + ZFCP_STATUS_COMMON_RUNNING, + ZFCP_SET); + zfcp_erp_adapter_reopen(adapter, + ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | + ZFCP_STATUS_COMMON_ERP_FAILED, + 102, req); + break; + case FSF_STATUS_READ_NOTIFICATION_LOST: + if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED) + zfcp_erp_adapter_access_changed(adapter, 135, req); + if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS) + schedule_work(&adapter->scan_work); + break; + case FSF_STATUS_READ_CFDC_UPDATED: + zfcp_erp_adapter_access_changed(adapter, 136, req); + break; + case FSF_STATUS_READ_FEATURE_UPDATE_ALERT: + adapter->adapter_features = sr_buf->payload.word[0]; break; } - skip_fsfstatus: - /* - * always call specific handlers to give them a chance to do - * something meaningful even in error cases - */ - zfcp_fsf_req_dispatch(fsf_req); + mempool_free(sr_buf, adapter->pool.data_status_read); + zfcp_fsf_req_free(req); - return retval; + atomic_inc(&adapter->stat_miss); + schedule_work(&adapter->stat_work); } -/* - * function: zfcp_fsf_fsfstatus_qual_eval - * - * purpose: evaluates FSF status-qualifier of completed FSF request - * and acts accordingly - * - * returns: - */ -static int -zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req) { - int retval = 0; - - switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) { + switch (req->qtcb->header.fsf_status_qual.word[0]) { case FSF_SQ_FCP_RSP_AVAILABLE: - break; - case FSF_SQ_RETRY_IF_POSSIBLE: - /* The SCSI-stack may now issue retries or escalate */ - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - case FSF_SQ_COMMAND_ABORTED: - /* Carry the aborted state on to upper layer */ - fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED; - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - case FSF_SQ_NO_RECOM: - ZFCP_LOG_NORMAL("bug: No recommendation could be given for a " - "problem on the adapter %s " - "Stopping all operations on this adapter. ", - zfcp_get_busid_by_adapter(fsf_req->adapter)); - zfcp_erp_adapter_shutdown(fsf_req->adapter, 0, 121, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - case FSF_SQ_ULP_PROGRAMMING_ERROR: - ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer " - "(adapter %s)\n", - zfcp_get_busid_by_adapter(fsf_req->adapter)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: case FSF_SQ_NO_RETRY_POSSIBLE: case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - /* dealt with in the respective functions */ + return; + case FSF_SQ_COMMAND_ABORTED: + req->status |= ZFCP_STATUS_FSFREQ_ABORTED; break; - default: - ZFCP_LOG_NORMAL("bug: Additional status info could " - "not be interpreted properly.\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, - (char *) &fsf_req->qtcb->header.fsf_status_qual, - sizeof (union fsf_status_qual)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + case FSF_SQ_NO_RECOM: + dev_err(&req->adapter->ccw_device->dev, + "No recommendation could be given for a " + "problem on the adapter.\n"); + zfcp_erp_adapter_shutdown(req->adapter, 0, 121, req); break; } - - return retval; + /* all non-return stats set FSFREQ_ERROR*/ + req->status |= ZFCP_STATUS_FSFREQ_ERROR; } -/** - * zfcp_fsf_link_down_info_eval - evaluate link down information block - */ -static void -zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *fsf_req, u8 id, - struct fsf_link_down_info *link_down) +static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req) { - struct zfcp_adapter *adapter = fsf_req->adapter; - - if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, - &adapter->status)) + if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) return; - atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status); - - if (link_down == NULL) - goto out; - - switch (link_down->error_code) { - case FSF_PSQ_LINK_NO_LIGHT: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(no light detected)\n", - zfcp_get_busid_by_adapter(adapter)); - break; - case FSF_PSQ_LINK_WRAP_PLUG: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(wrap plug detected)\n", - zfcp_get_busid_by_adapter(adapter)); - break; - case FSF_PSQ_LINK_NO_FCP: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(adjacent node on link does not support FCP)\n", - zfcp_get_busid_by_adapter(adapter)); + switch (req->qtcb->header.fsf_status) { + case FSF_UNKNOWN_COMMAND: + dev_err(&req->adapter->ccw_device->dev, + "Command issued by the device driver (0x%x) is " + "not known by the adapter.\n", + req->qtcb->header.fsf_command); + zfcp_erp_adapter_shutdown(req->adapter, 0, 120, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_PSQ_LINK_FIRMWARE_UPDATE: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(firmware update in progress)\n", - zfcp_get_busid_by_adapter(adapter)); - break; - case FSF_PSQ_LINK_INVALID_WWPN: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(duplicate or invalid WWPN detected)\n", - zfcp_get_busid_by_adapter(adapter)); + case FSF_ADAPTER_STATUS_AVAILABLE: + zfcp_fsf_fsfstatus_qual_eval(req); break; - case FSF_PSQ_LINK_NO_NPIV_SUPPORT: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(no support for NPIV by Fabric)\n", - zfcp_get_busid_by_adapter(adapter)); + } +} + +static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req) +{ + struct zfcp_adapter *adapter = req->adapter; + struct fsf_qtcb *qtcb = req->qtcb; + union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual; + + zfcp_hba_dbf_event_fsf_response(req); + + if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { + req->status |= ZFCP_STATUS_FSFREQ_ERROR | + ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */ + return; + } + + switch (qtcb->prefix.prot_status) { + case FSF_PROT_GOOD: + case FSF_PROT_FSF_STATUS_PRESENTED: + return; + case FSF_PROT_QTCB_VERSION_ERROR: + dev_err(&adapter->ccw_device->dev, + "The QTCB version requested by zfcp (0x%x) is not " + "supported by the FCP adapter (lowest supported " + "0x%x, highest supported 0x%x).\n", + FSF_QTCB_CURRENT_VERSION, psq->word[0], + psq->word[1]); + zfcp_erp_adapter_shutdown(adapter, 0, 117, req); break; - case FSF_PSQ_LINK_NO_FCP_RESOURCES: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(out of resource in FCP daughtercard)\n", - zfcp_get_busid_by_adapter(adapter)); + case FSF_PROT_ERROR_STATE: + case FSF_PROT_SEQ_NUMB_ERROR: + zfcp_erp_adapter_reopen(adapter, 0, 98, req); + req->status |= ZFCP_STATUS_FSFREQ_RETRY; break; - case FSF_PSQ_LINK_NO_FABRIC_RESOURCES: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(out of resource in Fabric)\n", - zfcp_get_busid_by_adapter(adapter)); + case FSF_PROT_UNSUPP_QTCB_TYPE: + dev_err(&adapter->ccw_device->dev, + "Packet header type used by the device driver is " + "incompatible with that used on the adapter.\n"); + zfcp_erp_adapter_shutdown(adapter, 0, 118, req); break; - case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(unable to Fabric login)\n", - zfcp_get_busid_by_adapter(adapter)); + case FSF_PROT_HOST_CONNECTION_INITIALIZING: + atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, + &adapter->status); break; - case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED: - ZFCP_LOG_NORMAL("WWPN assignment file corrupted on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); + case FSF_PROT_DUPLICATE_REQUEST_ID: + dev_err(&adapter->ccw_device->dev, + "The request identifier 0x%Lx is ambiguous.\n", + (unsigned long long)qtcb->bottom.support.req_handle); + zfcp_erp_adapter_shutdown(adapter, 0, 78, req); break; - case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED: - ZFCP_LOG_NORMAL("Mode table corrupted on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); + case FSF_PROT_LINK_DOWN: + zfcp_fsf_link_down_info_eval(req, 37, &psq->link_down_info); + /* FIXME: reopening adapter now? better wait for link up */ + zfcp_erp_adapter_reopen(adapter, 0, 79, req); break; - case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT: - ZFCP_LOG_NORMAL("No WWPN for assignment table on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); + case FSF_PROT_REEST_QUEUE: + /* All ports should be marked as ready to run again */ + zfcp_erp_modify_adapter_status(adapter, 28, NULL, + ZFCP_STATUS_COMMON_RUNNING, + ZFCP_SET); + zfcp_erp_adapter_reopen(adapter, + ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | + ZFCP_STATUS_COMMON_ERP_FAILED, 99, req); break; default: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(warning: unknown reason code %d)\n", - zfcp_get_busid_by_adapter(adapter), - link_down->error_code); - } - - if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) - ZFCP_LOG_DEBUG("Debug information to link down: " - "primary_status=0x%02x " - "ioerr_code=0x%02x " - "action_code=0x%02x " - "reason_code=0x%02x " - "explanation_code=0x%02x " - "vendor_specific_code=0x%02x\n", - link_down->primary_status, - link_down->ioerr_code, - link_down->action_code, - link_down->reason_code, - link_down->explanation_code, - link_down->vendor_specific_code); - - out: - zfcp_erp_adapter_failed(adapter, id, fsf_req); + dev_err(&adapter->ccw_device->dev, + "Transfer protocol status information" + "provided by the adapter (0x%x) " + "is not compatible with the device driver.\n", + qtcb->prefix.prot_status); + zfcp_erp_adapter_shutdown(adapter, 0, 119, req); + } + req->status |= ZFCP_STATUS_FSFREQ_ERROR; } -/* - * function: zfcp_fsf_req_dispatch - * - * purpose: calls the appropriate command specific handler +/** + * zfcp_fsf_req_complete - process completion of a FSF request + * @fsf_req: The FSF request that has been completed. * - * returns: + * When a request has been completed either from the FCP adapter, + * or it has been dismissed due to a queue shutdown, this function + * is called to process the completion status and trigger further + * events related to the FSF request. */ -static int -zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req) +void zfcp_fsf_req_complete(struct zfcp_fsf_req *req) { - struct zfcp_erp_action *erp_action = fsf_req->erp_action; - struct zfcp_adapter *adapter = fsf_req->adapter; - int retval = 0; + if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) { + zfcp_fsf_status_read_handler(req); + return; + } + del_timer(&req->timer); + zfcp_fsf_protstatus_eval(req); + zfcp_fsf_fsfstatus_eval(req); + req->handler(req); - switch (fsf_req->fsf_command) { + if (req->erp_action) + zfcp_erp_notify(req->erp_action, 0); + req->status |= ZFCP_STATUS_FSFREQ_COMPLETED; - case FSF_QTCB_FCP_CMND: - zfcp_fsf_send_fcp_command_handler(fsf_req); - break; + if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP)) + zfcp_fsf_req_free(req); + else + /* notify initiator waiting for the requests completion */ + /* + * FIXME: Race! We must not access fsf_req here as it might have been + * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED + * flag. It's an improbable case. But, we have the same paranoia for + * the cleanup flag already. + * Might better be handled using complete()? + * (setting the flag and doing wakeup ought to be atomic + * with regard to checking the flag as long as waitqueue is + * part of the to be released structure) + */ + wake_up(&req->completion_wq); +} - case FSF_QTCB_ABORT_FCP_CMND: - zfcp_fsf_abort_fcp_command_handler(fsf_req); - break; +static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req) +{ + struct fsf_qtcb_bottom_config *bottom; + struct zfcp_adapter *adapter = req->adapter; + struct Scsi_Host *shost = adapter->scsi_host; - case FSF_QTCB_SEND_GENERIC: - zfcp_fsf_send_ct_handler(fsf_req); - break; + bottom = &req->qtcb->bottom.config; - case FSF_QTCB_OPEN_PORT_WITH_DID: - zfcp_fsf_open_port_handler(fsf_req); - break; + if (req->data) + memcpy(req->data, bottom, sizeof(*bottom)); - case FSF_QTCB_OPEN_LUN: - zfcp_fsf_open_unit_handler(fsf_req); - break; + fc_host_node_name(shost) = bottom->nport_serv_param.wwnn; + fc_host_port_name(shost) = bottom->nport_serv_param.wwpn; + fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK; + fc_host_speed(shost) = bottom->fc_link_speed; + fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3; - case FSF_QTCB_CLOSE_LUN: - zfcp_fsf_close_unit_handler(fsf_req); - break; + adapter->hydra_version = bottom->adapter_type; + adapter->timer_ticks = bottom->timer_interval; - case FSF_QTCB_CLOSE_PORT: - zfcp_fsf_close_port_handler(fsf_req); - break; + if (fc_host_permanent_port_name(shost) == -1) + fc_host_permanent_port_name(shost) = fc_host_port_name(shost); - case FSF_QTCB_CLOSE_PHYSICAL_PORT: - zfcp_fsf_close_physical_port_handler(fsf_req); - break; + switch (bottom->fc_topology) { + case FSF_TOPO_P2P: + adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK; + adapter->peer_wwpn = bottom->plogi_payload.wwpn; + adapter->peer_wwnn = bottom->plogi_payload.wwnn; + fc_host_port_type(shost) = FC_PORTTYPE_PTP; + if (req->erp_action) + dev_info(&adapter->ccw_device->dev, + "Point-to-Point fibrechannel " + "configuration detected.\n"); + break; + case FSF_TOPO_FABRIC: + fc_host_port_type(shost) = FC_PORTTYPE_NPORT; + if (req->erp_action) + dev_info(&adapter->ccw_device->dev, + "Switched fabric fibrechannel " + "network detected.\n"); + break; + case FSF_TOPO_AL: + fc_host_port_type(shost) = FC_PORTTYPE_NLPORT; + dev_err(&adapter->ccw_device->dev, + "Unsupported arbitrated loop fibrechannel " + "topology detected, shutting down " + "adapter.\n"); + zfcp_erp_adapter_shutdown(adapter, 0, 127, req); + return -EIO; + default: + fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; + dev_err(&adapter->ccw_device->dev, + "The fibrechannel topology reported by the" + " adapter is not known by the zfcp driver," + " shutting down adapter.\n"); + zfcp_erp_adapter_shutdown(adapter, 0, 128, req); + return -EIO; + } - case FSF_QTCB_EXCHANGE_CONFIG_DATA: - zfcp_fsf_exchange_config_data_handler(fsf_req); - break; + return 0; +} - case FSF_QTCB_EXCHANGE_PORT_DATA: - zfcp_fsf_exchange_port_data_handler(fsf_req); - break; +static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req) +{ + struct zfcp_adapter *adapter = req->adapter; + struct fsf_qtcb *qtcb = req->qtcb; + struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config; + struct Scsi_Host *shost = adapter->scsi_host; - case FSF_QTCB_SEND_ELS: - zfcp_fsf_send_els_handler(fsf_req); - break; + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) + return; - case FSF_QTCB_DOWNLOAD_CONTROL_FILE: - zfcp_fsf_control_file_handler(fsf_req); - break; + adapter->fsf_lic_version = bottom->lic_version; + adapter->adapter_features = bottom->adapter_features; + adapter->connection_features = bottom->connection_features; + adapter->peer_wwpn = 0; + adapter->peer_wwnn = 0; + adapter->peer_d_id = 0; - case FSF_QTCB_UPLOAD_CONTROL_FILE: - zfcp_fsf_control_file_handler(fsf_req); + switch (qtcb->header.fsf_status) { + case FSF_GOOD: + if (zfcp_fsf_exchange_config_evaluate(req)) + return; + + if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) { + dev_err(&adapter->ccw_device->dev, + "Maximum QTCB size (%d bytes) allowed by " + "the adapter is lower than the minimum " + "required by the driver (%ld bytes).\n", + bottom->max_qtcb_size, + sizeof(struct fsf_qtcb)); + zfcp_erp_adapter_shutdown(adapter, 0, 129, req); + return; + } + atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, + &adapter->status); break; + case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: + fc_host_node_name(shost) = 0; + fc_host_port_name(shost) = 0; + fc_host_port_id(shost) = 0; + fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; + fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; + adapter->hydra_version = 0; + atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, + &adapter->status); + + zfcp_fsf_link_down_info_eval(req, 42, + &qtcb->header.fsf_status_qual.link_down_info); + break; default: - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - ZFCP_LOG_NORMAL("bug: Command issued by the device driver is " - "not supported by the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command) - ZFCP_LOG_NORMAL - ("bug: Command issued by the device driver differs " - "from the command returned by the adapter %s " - "(debug info 0x%x, 0x%x).\n", - zfcp_get_busid_by_adapter(adapter), - fsf_req->fsf_command, - fsf_req->qtcb->header.fsf_command); + zfcp_erp_adapter_shutdown(adapter, 0, 130, req); + return; } - if (!erp_action) - return retval; - - zfcp_erp_async_handler(erp_action, 0); + if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) { + adapter->hardware_version = bottom->hardware_version; + memcpy(fc_host_serial_number(shost), bottom->serial_number, + min(FC_SERIAL_NUMBER_SIZE, 17)); + EBCASC(fc_host_serial_number(shost), + min(FC_SERIAL_NUMBER_SIZE, 17)); + } - return retval; + if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) { + dev_err(&adapter->ccw_device->dev, + "The adapter only supports newer control block " + "versions, try updated device driver.\n"); + zfcp_erp_adapter_shutdown(adapter, 0, 125, req); + return; + } + if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) { + dev_err(&adapter->ccw_device->dev, + "The adapter only supports older control block " + "versions, consider a microcode upgrade.\n"); + zfcp_erp_adapter_shutdown(adapter, 0, 126, req); + } } -/* - * function: zfcp_fsf_status_read - * - * purpose: initiates a Status Read command at the specified adapter - * - * returns: - */ -int -zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags) +static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req) { - struct zfcp_fsf_req *fsf_req; - struct fsf_status_read_buffer *status_buffer; - unsigned long lock_flags; - volatile struct qdio_buffer_element *sbale; - int retval = 0; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS, - req_flags | ZFCP_REQ_NO_QTCB, - adapter->pool.fsf_req_status_read, - &lock_flags, &fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("error: Could not create unsolicited status " - "buffer for adapter %s.\n", - zfcp_get_busid_by_adapter(adapter)); - goto failed_req_create; - } - - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); - sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS; - sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY; - fsf_req->sbale_curr = 2; + struct zfcp_adapter *adapter = req->adapter; + struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port; + struct Scsi_Host *shost = adapter->scsi_host; - status_buffer = - mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC); - if (!status_buffer) { - ZFCP_LOG_NORMAL("bug: could not get some buffer\n"); - goto failed_buf; - } - memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer)); - fsf_req->data = (unsigned long) status_buffer; + if (req->data) + memcpy(req->data, bottom, sizeof(*bottom)); - /* insert pointer to respective buffer */ - sbale = zfcp_qdio_sbale_curr(fsf_req); - sbale->addr = (void *) status_buffer; - sbale->length = sizeof(struct fsf_status_read_buffer); + if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) + fc_host_permanent_port_name(shost) = bottom->wwpn; + else + fc_host_permanent_port_name(shost) = fc_host_port_name(shost); + fc_host_maxframe_size(shost) = bottom->maximum_frame_size; + fc_host_supported_speeds(shost) = bottom->supported_speed; +} - retval = zfcp_fsf_req_send(fsf_req); - if (retval) { - ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status " - "environment.\n"); - goto failed_req_send; - } +static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req) +{ + struct zfcp_adapter *adapter = req->adapter; + struct fsf_qtcb *qtcb = req->qtcb; - ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n", - zfcp_get_busid_by_adapter(adapter)); - goto out; + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) + return; - failed_req_send: - mempool_free(status_buffer, adapter->pool.data_status_read); + switch (qtcb->header.fsf_status) { + case FSF_GOOD: + zfcp_fsf_exchange_port_evaluate(req); + atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); + break; + case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: + zfcp_fsf_exchange_port_evaluate(req); + atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); + zfcp_fsf_link_down_info_eval(req, 43, + &qtcb->header.fsf_status_qual.link_down_info); + break; + } +} - failed_buf: - zfcp_fsf_req_free(fsf_req); - failed_req_create: - zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL); - out: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); - return retval; +static int zfcp_fsf_sbal_check(struct zfcp_qdio_queue *queue) +{ + spin_lock(&queue->lock); + if (atomic_read(&queue->count)) + return 1; + spin_unlock(&queue->lock); + return 0; } -static int -zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req) +static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter) { - struct fsf_status_read_buffer *status_buffer; - struct zfcp_adapter *adapter; - struct zfcp_port *port; - unsigned long flags; + long ret; + struct zfcp_qdio_queue *req_q = &adapter->req_q; - status_buffer = (struct fsf_status_read_buffer *) fsf_req->data; - adapter = fsf_req->adapter; + spin_unlock(&req_q->lock); + ret = wait_event_interruptible_timeout(adapter->request_wq, + zfcp_fsf_sbal_check(req_q), 5 * HZ); + if (ret > 0) + return 0; - read_lock_irqsave(&zfcp_data.config_lock, flags); - list_for_each_entry(port, &adapter->port_list_head, list) - if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK)) - break; - read_unlock_irqrestore(&zfcp_data.config_lock, flags); + spin_lock(&req_q->lock); + return -EIO; +} - if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) { - ZFCP_LOG_NORMAL("bug: Reopen port indication received for " - "nonexisting port with d_id 0x%06x on " - "adapter %s. Ignored.\n", - status_buffer->d_id & ZFCP_DID_MASK, - zfcp_get_busid_by_adapter(adapter)); - goto out; - } +static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool) +{ + struct zfcp_fsf_req *req; + req = mempool_alloc(pool, GFP_ATOMIC); + if (!req) + return NULL; + memset(req, 0, sizeof(*req)); + return req; +} - switch (status_buffer->status_subtype) { +static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool) +{ + struct zfcp_fsf_req_qtcb *qtcb; - case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT: - zfcp_erp_port_reopen(port, 0, 101, fsf_req); - break; + if (likely(pool)) + qtcb = mempool_alloc(pool, GFP_ATOMIC); + else + qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache, + GFP_ATOMIC); + if (unlikely(!qtcb)) + return NULL; - case FSF_STATUS_READ_SUB_ERROR_PORT: - zfcp_erp_port_shutdown(port, 0, 122, fsf_req); - break; + memset(qtcb, 0, sizeof(*qtcb)); + qtcb->fsf_req.qtcb = &qtcb->qtcb; + qtcb->fsf_req.pool = pool; - default: - ZFCP_LOG_NORMAL("bug: Undefined status subtype received " - "for a reopen indication on port with " - "d_id 0x%06x on the adapter %s. " - "Ignored. (debug info 0x%x)\n", - status_buffer->d_id, - zfcp_get_busid_by_adapter(adapter), - status_buffer->status_subtype); - } - out: - return 0; + return &qtcb->fsf_req; } -/* - * function: zfcp_fsf_status_read_handler - * - * purpose: is called for finished Open Port command - * - * returns: - */ -static int -zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req) +static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter, + u32 fsf_cmd, int req_flags, + mempool_t *pool) { - int retval = 0; - struct zfcp_adapter *adapter = fsf_req->adapter; - struct fsf_status_read_buffer *status_buffer = - (struct fsf_status_read_buffer *) fsf_req->data; - struct fsf_bit_error_payload *fsf_bit_error; - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { - zfcp_hba_dbf_event_fsf_unsol("dism", adapter, status_buffer); - mempool_free(status_buffer, adapter->pool.data_status_read); - zfcp_fsf_req_free(fsf_req); - goto out; - } + volatile struct qdio_buffer_element *sbale; - zfcp_hba_dbf_event_fsf_unsol("read", adapter, status_buffer); + struct zfcp_fsf_req *req; + struct zfcp_qdio_queue *req_q = &adapter->req_q; - switch (status_buffer->status_type) { + if (req_flags & ZFCP_REQ_NO_QTCB) + req = zfcp_fsf_alloc_noqtcb(pool); + else + req = zfcp_fsf_alloc_qtcb(pool); - case FSF_STATUS_READ_PORT_CLOSED: - zfcp_fsf_status_read_port_closed(fsf_req); - break; + if (unlikely(!req)) + return ERR_PTR(-EIO); - case FSF_STATUS_READ_INCOMING_ELS: - zfcp_fsf_incoming_els(fsf_req); - break; + if (adapter->req_no == 0) + adapter->req_no++; - case FSF_STATUS_READ_SENSE_DATA_AVAIL: - ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n", - zfcp_get_busid_by_adapter(adapter)); - break; + INIT_LIST_HEAD(&req->list); + init_timer(&req->timer); + init_waitqueue_head(&req->completion_wq); - case FSF_STATUS_READ_BIT_ERROR_THRESHOLD: - fsf_bit_error = (struct fsf_bit_error_payload *) - status_buffer->payload; - ZFCP_LOG_NORMAL("Warning: bit error threshold data " - "received (adapter %s, " - "link failures = %i, loss of sync errors = %i, " - "loss of signal errors = %i, " - "primitive sequence errors = %i, " - "invalid transmission word errors = %i, " - "CRC errors = %i)\n", - zfcp_get_busid_by_adapter(adapter), - fsf_bit_error->link_failure_error_count, - fsf_bit_error->loss_of_sync_error_count, - fsf_bit_error->loss_of_signal_error_count, - fsf_bit_error->primitive_sequence_error_count, - fsf_bit_error->invalid_transmission_word_error_count, - fsf_bit_error->crc_error_count); - ZFCP_LOG_INFO("Additional bit error threshold data " - "(adapter %s, " - "primitive sequence event time-outs = %i, " - "elastic buffer overrun errors = %i, " - "advertised receive buffer-to-buffer credit = %i, " - "current receice buffer-to-buffer credit = %i, " - "advertised transmit buffer-to-buffer credit = %i, " - "current transmit buffer-to-buffer credit = %i)\n", - zfcp_get_busid_by_adapter(adapter), - fsf_bit_error->primitive_sequence_event_timeout_count, - fsf_bit_error->elastic_buffer_overrun_error_count, - fsf_bit_error->advertised_receive_b2b_credit, - fsf_bit_error->current_receive_b2b_credit, - fsf_bit_error->advertised_transmit_b2b_credit, - fsf_bit_error->current_transmit_b2b_credit); - break; + req->adapter = adapter; + req->fsf_command = fsf_cmd; + req->req_id = adapter->req_no++; + req->sbal_number = 1; + req->sbal_first = req_q->first; + req->sbal_last = req_q->first; + req->sbale_curr = 1; - case FSF_STATUS_READ_LINK_DOWN: - switch (status_buffer->status_subtype) { - case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK: - ZFCP_LOG_INFO("Physical link to adapter %s is down\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_fsf_link_down_info_eval(fsf_req, 38, - (struct fsf_link_down_info *) - &status_buffer->payload); - break; - case FSF_STATUS_READ_SUB_FDISC_FAILED: - ZFCP_LOG_INFO("Local link to adapter %s is down " - "due to failed FDISC login\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_fsf_link_down_info_eval(fsf_req, 39, - (struct fsf_link_down_info *) - &status_buffer->payload); - break; - case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE: - ZFCP_LOG_INFO("Local link to adapter %s is down " - "due to firmware update on adapter\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_fsf_link_down_info_eval(fsf_req, 40, NULL); - break; - default: - ZFCP_LOG_INFO("Local link to adapter %s is down " - "due to unknown reason\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_fsf_link_down_info_eval(fsf_req, 41, NULL); - }; - break; + sbale = zfcp_qdio_sbale_req(req); + sbale[0].addr = (void *) req->req_id; + sbale[0].flags |= SBAL_FLAGS0_COMMAND; - case FSF_STATUS_READ_LINK_UP: - ZFCP_LOG_NORMAL("Local link to adapter %s was replugged. " - "Restarting operations on this adapter\n", - zfcp_get_busid_by_adapter(adapter)); - /* All ports should be marked as ready to run again */ - zfcp_erp_modify_adapter_status(adapter, 30, NULL, - ZFCP_STATUS_COMMON_RUNNING, - ZFCP_SET); - zfcp_erp_adapter_reopen(adapter, - ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED - | ZFCP_STATUS_COMMON_ERP_FAILED, - 102, fsf_req); - break; + if (likely(req->qtcb)) { + req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no; + req->qtcb->prefix.req_id = req->req_id; + req->qtcb->prefix.ulp_info = 26; + req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command]; + req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION; + req->qtcb->header.req_handle = req->req_id; + req->qtcb->header.fsf_command = req->fsf_command; + req->seq_no = adapter->fsf_req_seq_no; + req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no; + sbale[1].addr = (void *) req->qtcb; + sbale[1].length = sizeof(struct fsf_qtcb); + } - case FSF_STATUS_READ_NOTIFICATION_LOST: - ZFCP_LOG_NORMAL("Unsolicited status notification(s) lost: " - "adapter %s%s%s%s%s%s%s%s%s\n", - zfcp_get_busid_by_adapter(adapter), - (status_buffer->status_subtype & - FSF_STATUS_READ_SUB_INCOMING_ELS) ? - ", incoming ELS" : "", - (status_buffer->status_subtype & - FSF_STATUS_READ_SUB_SENSE_DATA) ? - ", sense data" : "", - (status_buffer->status_subtype & - FSF_STATUS_READ_SUB_LINK_STATUS) ? - ", link status change" : "", - (status_buffer->status_subtype & - FSF_STATUS_READ_SUB_PORT_CLOSED) ? - ", port close" : "", - (status_buffer->status_subtype & - FSF_STATUS_READ_SUB_BIT_ERROR_THRESHOLD) ? - ", bit error exception" : "", - (status_buffer->status_subtype & - FSF_STATUS_READ_SUB_ACT_UPDATED) ? - ", ACT update" : "", - (status_buffer->status_subtype & - FSF_STATUS_READ_SUB_ACT_HARDENED) ? - ", ACT hardening" : "", - (status_buffer->status_subtype & - FSF_STATUS_READ_SUB_FEATURE_UPDATE_ALERT) ? - ", adapter feature change" : ""); - - if (status_buffer->status_subtype & - FSF_STATUS_READ_SUB_ACT_UPDATED) - zfcp_erp_adapter_access_changed(adapter, 135, fsf_req); - break; + if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) { + zfcp_fsf_req_free(req); + return ERR_PTR(-EIO); + } - case FSF_STATUS_READ_CFDC_UPDATED: - ZFCP_LOG_NORMAL("CFDC has been updated on the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_access_changed(adapter, 136, fsf_req); - break; + if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) + req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; - case FSF_STATUS_READ_CFDC_HARDENED: - switch (status_buffer->status_subtype) { - case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE: - ZFCP_LOG_NORMAL("CFDC of adapter %s saved on SE\n", - zfcp_get_busid_by_adapter(adapter)); - break; - case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2: - ZFCP_LOG_NORMAL("CFDC of adapter %s has been copied " - "to the secondary SE\n", - zfcp_get_busid_by_adapter(adapter)); - break; - default: - ZFCP_LOG_NORMAL("CFDC of adapter %s has been hardened\n", - zfcp_get_busid_by_adapter(adapter)); - } - break; + return req; +} - case FSF_STATUS_READ_FEATURE_UPDATE_ALERT: - ZFCP_LOG_INFO("List of supported features on adapter %s has " - "been changed from 0x%08X to 0x%08X\n", - zfcp_get_busid_by_adapter(adapter), - *(u32*) (status_buffer->payload + 4), - *(u32*) (status_buffer->payload)); - adapter->adapter_features = *(u32*) status_buffer->payload; - break; +static int zfcp_fsf_req_send(struct zfcp_fsf_req *req) +{ + struct zfcp_adapter *adapter = req->adapter; + struct zfcp_qdio_queue *req_q = &adapter->req_q; + int idx; - default: - ZFCP_LOG_NORMAL("warning: An unsolicited status packet of unknown " - "type was received (debug info 0x%x)\n", - status_buffer->status_type); - ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n", - status_buffer); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) status_buffer, - sizeof (struct fsf_status_read_buffer)); - break; - } - mempool_free(status_buffer, adapter->pool.data_status_read); - zfcp_fsf_req_free(fsf_req); - /* - * recycle buffer and start new request repeat until outbound - * queue is empty or adapter shutdown is requested - */ - /* - * FIXME(qdio): - * we may wait in the req_create for 5s during shutdown, so - * qdio_cleanup will have to wait at least that long before returning - * with failure to allow us a proper cleanup under all circumstances - */ - /* - * FIXME: - * allocation failure possible? (Is this code needed?) - */ - retval = zfcp_fsf_status_read(adapter, 0); - if (retval < 0) { - ZFCP_LOG_INFO("Failed to create unsolicited status read " - "request for the adapter %s.\n", - zfcp_get_busid_by_adapter(adapter)); - /* temporary fix to avoid status read buffer shortage */ - adapter->status_read_failed++; - if ((ZFCP_STATUS_READS_RECOM - adapter->status_read_failed) - < ZFCP_STATUS_READ_FAILED_THRESHOLD) { - ZFCP_LOG_INFO("restart adapter %s due to status read " - "buffer shortage\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_reopen(adapter, 0, 103, fsf_req); - } + /* put allocated FSF request into hash table */ + spin_lock(&adapter->req_list_lock); + idx = zfcp_reqlist_hash(req->req_id); + list_add_tail(&req->list, &adapter->req_list[idx]); + spin_unlock(&adapter->req_list_lock); + + req->issued = get_clock(); + if (zfcp_qdio_send(req)) { + /* Queues are down..... */ + del_timer(&req->timer); + spin_lock(&adapter->req_list_lock); + zfcp_reqlist_remove(adapter, req); + spin_unlock(&adapter->req_list_lock); + /* undo changes in request queue made for this request */ + atomic_add(req->sbal_number, &req_q->count); + req_q->first -= req->sbal_number; + req_q->first += QDIO_MAX_BUFFERS_PER_Q; + req_q->first %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */ + zfcp_erp_adapter_reopen(adapter, 0, 116, req); + return -EIO; } - out: - return retval; + + /* Don't increase for unsolicited status */ + if (req->qtcb) + adapter->fsf_req_seq_no++; + + return 0; } -/* - * function: zfcp_fsf_abort_fcp_command - * - * purpose: tells FSF to abort a running SCSI command - * - * returns: address of initiated FSF request - * NULL - request could not be initiated - * - * FIXME(design): should be watched by a timeout !!! - * FIXME(design) shouldn't this be modified to return an int - * also...don't know how though +/** + * zfcp_fsf_status_read - send status read request + * @adapter: pointer to struct zfcp_adapter + * @req_flags: request flags + * Returns: 0 on success, ERROR otherwise */ -struct zfcp_fsf_req * -zfcp_fsf_abort_fcp_command(unsigned long old_req_id, - struct zfcp_adapter *adapter, - struct zfcp_unit *unit, int req_flags) +int zfcp_fsf_status_read(struct zfcp_adapter *adapter) { + struct zfcp_fsf_req *req; + struct fsf_status_read_buffer *sr_buf; volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req = NULL; - unsigned long lock_flags; - int retval = 0; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND, - req_flags, adapter->pool.fsf_req_abort, - &lock_flags, &fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("error: Failed to create an abort command " - "request for lun 0x%016Lx on port 0x%016Lx " - "on adapter %s.\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_adapter(adapter)); - goto out; - } - - if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, - &unit->status))) - goto unit_blocked; + int retval = -EIO; - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); - sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + spin_lock(&adapter->req_q.lock); + if (zfcp_fsf_req_sbal_get(adapter)) + goto out; - fsf_req->data = (unsigned long) unit; + req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS, + ZFCP_REQ_NO_QTCB, + adapter->pool.fsf_req_status_read); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); + goto out; + } - /* set handles of unit and its parent port in QTCB */ - fsf_req->qtcb->header.lun_handle = unit->handle; - fsf_req->qtcb->header.port_handle = unit->port->handle; + sbale = zfcp_qdio_sbale_req(req); + sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS; + sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY; + req->sbale_curr = 2; - /* set handle of request which should be aborted */ - fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id; + sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC); + if (!sr_buf) { + retval = -ENOMEM; + goto failed_buf; + } + memset(sr_buf, 0, sizeof(*sr_buf)); + req->data = sr_buf; + sbale = zfcp_qdio_sbale_curr(req); + sbale->addr = (void *) sr_buf; + sbale->length = sizeof(*sr_buf); - zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT); - retval = zfcp_fsf_req_send(fsf_req); - if (!retval) - goto out; + retval = zfcp_fsf_req_send(req); + if (retval) + goto failed_req_send; - unit_blocked: - zfcp_fsf_req_free(fsf_req); - fsf_req = NULL; + goto out; - out: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); - return fsf_req; +failed_req_send: + mempool_free(sr_buf, adapter->pool.data_status_read); +failed_buf: + zfcp_fsf_req_free(req); + zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL); +out: + spin_unlock(&adapter->req_q.lock); + return retval; } -/* - * function: zfcp_fsf_abort_fcp_command_handler - * - * purpose: is called for finished Abort FCP Command request - * - * returns: - */ -static int -zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req) +static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req) { - int retval = -EINVAL; - struct zfcp_unit *unit; - union fsf_status_qual *fsf_stat_qual = - &new_fsf_req->qtcb->header.fsf_status_qual; - - if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { - /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */ - goto skip_fsfstatus; - } - - unit = (struct zfcp_unit *) new_fsf_req->data; + struct zfcp_unit *unit = req->data; + union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual; - /* evaluate FSF status in QTCB */ - switch (new_fsf_req->qtcb->header.fsf_status) { + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) + return; + switch (req->qtcb->header.fsf_status) { case FSF_PORT_HANDLE_NOT_VALID: - if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) { - /* - * In this case a command that was sent prior to a port - * reopen was aborted (handles are different). This is - * fine. - */ - } else { - ZFCP_LOG_INFO("Temporary port identifier 0x%x for " - "port 0x%016Lx on adapter %s invalid. " - "This may happen occasionally.\n", - unit->port->handle, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - ZFCP_LOG_INFO("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, - (char *) &new_fsf_req->qtcb->header. - fsf_status_qual, - sizeof (union fsf_status_qual)); - /* Let's hope this sorts out the mess */ + if (fsq->word[0] == fsq->word[1]) { zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104, - new_fsf_req); - new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; } break; - case FSF_LUN_HANDLE_NOT_VALID: - if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) { - /* - * In this case a command that was sent prior to a unit - * reopen was aborted (handles are different). - * This is fine. - */ - } else { - ZFCP_LOG_INFO - ("Warning: Temporary LUN identifier 0x%x of LUN " - "0x%016Lx on port 0x%016Lx on adapter %s is " - "invalid. This may happen in rare cases. " - "Trying to re-establish link.\n", - unit->handle, - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - ZFCP_LOG_DEBUG("Status qualifier data:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &new_fsf_req->qtcb->header. - fsf_status_qual, - sizeof (union fsf_status_qual)); - /* Let's hope this sorts out the mess */ - zfcp_erp_port_reopen(unit->port, 0, 105, new_fsf_req); - new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + if (fsq->word[0] == fsq->word[1]) { + zfcp_erp_port_reopen(unit->port, 0, 105, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; } break; - case FSF_FCP_COMMAND_DOES_NOT_EXIST: - retval = 0; - new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED; + req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED; break; - case FSF_PORT_BOXED: - ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to " - "be reopened\n", unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - zfcp_erp_port_boxed(unit->port, 47, new_fsf_req); - new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR - | ZFCP_STATUS_FSFREQ_RETRY; + zfcp_erp_port_boxed(unit->port, 47, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR | + ZFCP_STATUS_FSFREQ_RETRY; break; - case FSF_LUN_BOXED: - ZFCP_LOG_INFO( - "unit 0x%016Lx on port 0x%016Lx on adapter %s needs " - "to be reopened\n", - unit->fcp_lun, unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - zfcp_erp_unit_boxed(unit, 48, new_fsf_req); - new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR - | ZFCP_STATUS_FSFREQ_RETRY; + zfcp_erp_unit_boxed(unit, 48, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR | + ZFCP_STATUS_FSFREQ_RETRY; break; - case FSF_ADAPTER_STATUS_AVAILABLE: - switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) { + switch (fsq->word[0]) { case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: zfcp_test_link(unit->port); - new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - /* SCSI stack will escalate */ - new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - default: - ZFCP_LOG_NORMAL - ("bug: Wrong status qualifier 0x%x arrived.\n", - new_fsf_req->qtcb->header.fsf_status_qual.word[0]); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } break; - case FSF_GOOD: - retval = 0; - new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED; - break; - - default: - ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " - "(debug info 0x%x)\n", - new_fsf_req->qtcb->header.fsf_status); + req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED; break; } - skip_fsfstatus: - return retval; } /** - * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into - * one SBALE - * Two scatter-gather lists are passed, one for the reqeust and one for the - * response. + * zfcp_fsf_abort_fcp_command - abort running SCSI command + * @old_req_id: unsigned long + * @adapter: pointer to struct zfcp_adapter + * @unit: pointer to struct zfcp_unit + * @req_flags: integer specifying the request flags + * Returns: pointer to struct zfcp_fsf_req + * + * FIXME(design): should be watched by a timeout !!! */ -static inline int -zfcp_use_one_sbal(struct scatterlist *req, int req_count, - struct scatterlist *resp, int resp_count) -{ - return ((req_count == 1) && - (resp_count == 1) && - (((unsigned long) zfcp_sg_to_address(&req[0]) & - PAGE_MASK) == - ((unsigned long) (zfcp_sg_to_address(&req[0]) + - req[0].length - 1) & PAGE_MASK)) && - (((unsigned long) zfcp_sg_to_address(&resp[0]) & - PAGE_MASK) == - ((unsigned long) (zfcp_sg_to_address(&resp[0]) + - resp[0].length - 1) & PAGE_MASK))); -} -/** - * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS) - * @ct: pointer to struct zfcp_send_ct which conatins all needed data for - * the request - * @pool: pointer to memory pool, if non-null this pool is used to allocate - * a struct zfcp_fsf_req - * @erp_action: pointer to erp_action, if non-null the Generic Service request - * is sent within error recovery - */ -int -zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool, - struct zfcp_erp_action *erp_action) +struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id, + struct zfcp_adapter *adapter, + struct zfcp_unit *unit, + int req_flags) { volatile struct qdio_buffer_element *sbale; - struct zfcp_port *port; - struct zfcp_adapter *adapter; - struct zfcp_fsf_req *fsf_req; - unsigned long lock_flags; - int bytes; - int ret = 0; - - port = ct->port; - adapter = port->adapter; - - ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC, - ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, - pool, &lock_flags, &fsf_req); - if (ret < 0) { - ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for " - "adapter: %s\n", - zfcp_get_busid_by_adapter(adapter)); - goto failed_req; - } + struct zfcp_fsf_req *req = NULL; - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); - if (zfcp_use_one_sbal(ct->req, ct->req_count, - ct->resp, ct->resp_count)){ - /* both request buffer and response buffer - fit into one sbale each */ - sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; - sbale[2].addr = zfcp_sg_to_address(&ct->req[0]); - sbale[2].length = ct->req[0].length; - sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]); - sbale[3].length = ct->resp[0].length; - sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; - } else if (adapter->adapter_features & - FSF_FEATURE_ELS_CT_CHAINED_SBALS) { - /* try to use chained SBALs */ - bytes = zfcp_qdio_sbals_from_sg(fsf_req, - SBAL_FLAGS0_TYPE_WRITE_READ, - ct->req, ct->req_count, - ZFCP_MAX_SBALS_PER_CT_REQ); - if (bytes <= 0) { - ZFCP_LOG_INFO("error: creation of CT request failed " - "on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - if (bytes == 0) - ret = -ENOMEM; - else - ret = bytes; - - goto failed_send; - } - fsf_req->qtcb->bottom.support.req_buf_length = bytes; - fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; - bytes = zfcp_qdio_sbals_from_sg(fsf_req, - SBAL_FLAGS0_TYPE_WRITE_READ, - ct->resp, ct->resp_count, - ZFCP_MAX_SBALS_PER_CT_REQ); - if (bytes <= 0) { - ZFCP_LOG_INFO("error: creation of CT request failed " - "on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - if (bytes == 0) - ret = -ENOMEM; - else - ret = bytes; - - goto failed_send; - } - fsf_req->qtcb->bottom.support.resp_buf_length = bytes; - } else { - /* reject send generic request */ - ZFCP_LOG_INFO( - "error: microcode does not support chained SBALs," - "CT request too big (adapter %s)\n", - zfcp_get_busid_by_adapter(adapter)); - ret = -EOPNOTSUPP; - goto failed_send; - } - - /* settings in QTCB */ - fsf_req->qtcb->header.port_handle = port->handle; - fsf_req->qtcb->bottom.support.service_class = - ZFCP_FC_SERVICE_CLASS_DEFAULT; - fsf_req->qtcb->bottom.support.timeout = ct->timeout; - fsf_req->data = (unsigned long) ct; - - zfcp_san_dbf_event_ct_request(fsf_req); + spin_lock(&adapter->req_q.lock); + if (!atomic_read(&adapter->req_q.count)) + goto out; + req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND, + req_flags, adapter->pool.fsf_req_abort); + if (unlikely(IS_ERR(req))) + goto out; - if (erp_action) { - erp_action->fsf_req = fsf_req; - fsf_req->erp_action = erp_action; - zfcp_erp_start_timer(fsf_req); - } else - zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); + if (unlikely(!(atomic_read(&unit->status) & + ZFCP_STATUS_COMMON_UNBLOCKED))) + goto out_error_free; - ret = zfcp_fsf_req_send(fsf_req); - if (ret) { - ZFCP_LOG_DEBUG("error: initiation of CT request failed " - "(adapter %s, port 0x%016Lx)\n", - zfcp_get_busid_by_adapter(adapter), port->wwpn); - goto failed_send; - } + sbale = zfcp_qdio_sbale_req(req); + sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; + sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n", - zfcp_get_busid_by_adapter(adapter), port->wwpn); - goto out; + req->data = unit; + req->handler = zfcp_fsf_abort_fcp_command_handler; + req->qtcb->header.lun_handle = unit->handle; + req->qtcb->header.port_handle = unit->port->handle; + req->qtcb->bottom.support.req_handle = (u64) old_req_id; - failed_send: - zfcp_fsf_req_free(fsf_req); - if (erp_action != NULL) { - erp_action->fsf_req = NULL; - } - failed_req: - out: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); - return ret; + zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT); + if (!zfcp_fsf_req_send(req)) + goto out; + +out_error_free: + zfcp_fsf_req_free(req); + req = NULL; +out: + spin_unlock(&adapter->req_q.lock); + return req; } -/** - * zfcp_fsf_send_ct_handler - handler for Generic Service requests - * @fsf_req: pointer to struct zfcp_fsf_req - * - * Data specific for the Generic Service request is passed using - * fsf_req->data. There we find the pointer to struct zfcp_send_ct. - * Usually a specific handler for the CT request is called which is - * found in this structure. - */ -static int -zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req) { - struct zfcp_port *port; - struct zfcp_adapter *adapter; - struct zfcp_send_ct *send_ct; - struct fsf_qtcb_header *header; - struct fsf_qtcb_bottom_support *bottom; - int retval = -EINVAL; - u16 subtable, rule, counter; + struct zfcp_adapter *adapter = req->adapter; + struct zfcp_send_ct *send_ct = req->data; + struct zfcp_port *port = send_ct->port; + struct fsf_qtcb_header *header = &req->qtcb->header; - adapter = fsf_req->adapter; - send_ct = (struct zfcp_send_ct *) fsf_req->data; - port = send_ct->port; - header = &fsf_req->qtcb->header; - bottom = &fsf_req->qtcb->bottom.support; + send_ct->status = -EINVAL; - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) goto skip_fsfstatus; - /* evaluate FSF status in QTCB */ switch (header->fsf_status) { - case FSF_GOOD: - zfcp_san_dbf_event_ct_response(fsf_req); - retval = 0; + zfcp_san_dbf_event_ct_response(req); + send_ct->status = 0; break; - case FSF_SERVICE_CLASS_NOT_SUPPORTED: - ZFCP_LOG_INFO("error: adapter %s does not support fc " - "class %d.\n", - zfcp_get_busid_by_port(port), - ZFCP_FC_SERVICE_CLASS_DEFAULT); - /* stop operation for this adapter */ - zfcp_erp_adapter_shutdown(adapter, 0, 123, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_fsf_class_not_supp(req); break; - case FSF_ADAPTER_STATUS_AVAILABLE: switch (header->fsf_status_qual.word[0]){ case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: - /* reopening link to port */ zfcp_test_link(port); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - /* ERP strategy will escalate */ - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - default: - ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x " - "arrived.\n", - header->fsf_status_qual.word[0]); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } break; - case FSF_ACCESS_DENIED: - ZFCP_LOG_NORMAL("access denied, cannot send generic service " - "command (adapter %s, port d_id=0x%06x)\n", - zfcp_get_busid_by_port(port), port->d_id); - for (counter = 0; counter < 2; counter++) { - subtable = header->fsf_status_qual.halfword[counter * 2]; - rule = header->fsf_status_qual.halfword[counter * 2 + 1]; - switch (subtable) { - case FSF_SQ_CFDC_SUBTABLE_OS: - case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: - case FSF_SQ_CFDC_SUBTABLE_PORT_DID: - case FSF_SQ_CFDC_SUBTABLE_LUN: - ZFCP_LOG_INFO("Access denied (%s rule %d)\n", - zfcp_act_subtable_type[subtable], rule); - break; - } - } - zfcp_erp_port_access_denied(port, 55, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - case FSF_GENERIC_COMMAND_REJECTED: - ZFCP_LOG_INFO("generic service command rejected " - "(adapter %s, port d_id=0x%06x)\n", - zfcp_get_busid_by_port(port), port->d_id); - ZFCP_LOG_INFO("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, - (char *) &header->fsf_status_qual, - sizeof (union fsf_status_qual)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - case FSF_PORT_HANDLE_NOT_VALID: - ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port " - "0x%016Lx on adapter %s invalid. This may " - "happen occasionally.\n", port->handle, - port->wwpn, zfcp_get_busid_by_port(port)); - ZFCP_LOG_INFO("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, - (char *) &header->fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_adapter_reopen(adapter, 0, 106, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_fsf_access_denied_port(req, port); break; - case FSF_PORT_BOXED: - ZFCP_LOG_INFO("port needs to be reopened " - "(adapter %s, port d_id=0x%06x)\n", - zfcp_get_busid_by_port(port), port->d_id); - zfcp_erp_port_boxed(port, 49, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR - | ZFCP_STATUS_FSFREQ_RETRY; + zfcp_erp_port_boxed(port, 49, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR | + ZFCP_STATUS_FSFREQ_RETRY; break; - - /* following states should never occure, all cases avoided - in zfcp_fsf_send_ct - but who knows ... */ + case FSF_PORT_HANDLE_NOT_VALID: + zfcp_erp_adapter_reopen(adapter, 0, 106, req); + case FSF_GENERIC_COMMAND_REJECTED: case FSF_PAYLOAD_SIZE_MISMATCH: - ZFCP_LOG_INFO("payload size mismatch (adapter: %s, " - "req_buf_length=%d, resp_buf_length=%d)\n", - zfcp_get_busid_by_adapter(adapter), - bottom->req_buf_length, bottom->resp_buf_length); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; case FSF_REQUEST_SIZE_TOO_LARGE: - ZFCP_LOG_INFO("request size too large (adapter: %s, " - "req_buf_length=%d)\n", - zfcp_get_busid_by_adapter(adapter), - bottom->req_buf_length); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; case FSF_RESPONSE_SIZE_TOO_LARGE: - ZFCP_LOG_INFO("response size too large (adapter: %s, " - "resp_buf_length=%d)\n", - zfcp_get_busid_by_adapter(adapter), - bottom->resp_buf_length); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; case FSF_SBAL_MISMATCH: - ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, " - "resp_buf_length=%d)\n", - zfcp_get_busid_by_adapter(adapter), - bottom->req_buf_length, bottom->resp_buf_length); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - default: - ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " - "(debug info 0x%x)\n", header->fsf_status); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } skip_fsfstatus: - send_ct->status = retval; - - if (send_ct->handler != NULL) + if (send_ct->handler) send_ct->handler(send_ct->handler_data); +} - return retval; +static int zfcp_fsf_setup_sbals(struct zfcp_fsf_req *req, + struct scatterlist *sg_req, + struct scatterlist *sg_resp, int max_sbals) +{ + int bytes; + + bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ, + sg_req, max_sbals); + if (bytes <= 0) + return -ENOMEM; + req->qtcb->bottom.support.req_buf_length = bytes; + req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; + + bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ, + sg_resp, max_sbals); + if (bytes <= 0) + return -ENOMEM; + req->qtcb->bottom.support.resp_buf_length = bytes; + + return 0; } /** - * zfcp_fsf_send_els - initiate an ELS command (FC-FS) - * @els: pointer to struct zfcp_send_els which contains all needed data for - * the command. + * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS) + * @ct: pointer to struct zfcp_send_ct with data for request + * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req + * @erp_action: if non-null the Generic Service request sent within ERP */ -int -zfcp_fsf_send_els(struct zfcp_send_els *els) +int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool, + struct zfcp_erp_action *erp_action) { - volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; - u32 d_id; - struct zfcp_adapter *adapter; - unsigned long lock_flags; - int bytes; - int ret = 0; - - d_id = els->d_id; - adapter = els->adapter; + struct zfcp_port *port = ct->port; + struct zfcp_adapter *adapter = port->adapter; + struct zfcp_fsf_req *req; + int ret = -EIO; - ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS, - ZFCP_REQ_AUTO_CLEANUP, - NULL, &lock_flags, &fsf_req); - if (ret < 0) { - ZFCP_LOG_INFO("error: creation of ELS request failed " - "(adapter %s, port d_id: 0x%06x)\n", - zfcp_get_busid_by_adapter(adapter), d_id); - goto failed_req; - } + spin_lock(&adapter->req_q.lock); + if (zfcp_fsf_req_sbal_get(adapter)) + goto out; - if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, - &els->port->status))) { - ret = -EBUSY; - goto port_blocked; + req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC, + ZFCP_REQ_AUTO_CLEANUP, pool); + if (unlikely(IS_ERR(req))) { + ret = PTR_ERR(req); + goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); - if (zfcp_use_one_sbal(els->req, els->req_count, - els->resp, els->resp_count)){ - /* both request buffer and response buffer - fit into one sbale each */ - sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; - sbale[2].addr = zfcp_sg_to_address(&els->req[0]); - sbale[2].length = els->req[0].length; - sbale[3].addr = zfcp_sg_to_address(&els->resp[0]); - sbale[3].length = els->resp[0].length; - sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; - } else if (adapter->adapter_features & - FSF_FEATURE_ELS_CT_CHAINED_SBALS) { - /* try to use chained SBALs */ - bytes = zfcp_qdio_sbals_from_sg(fsf_req, - SBAL_FLAGS0_TYPE_WRITE_READ, - els->req, els->req_count, - ZFCP_MAX_SBALS_PER_ELS_REQ); - if (bytes <= 0) { - ZFCP_LOG_INFO("error: creation of ELS request failed " - "(adapter %s, port d_id: 0x%06x)\n", - zfcp_get_busid_by_adapter(adapter), d_id); - if (bytes == 0) { - ret = -ENOMEM; - } else { - ret = bytes; - } - goto failed_send; - } - fsf_req->qtcb->bottom.support.req_buf_length = bytes; - fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; - bytes = zfcp_qdio_sbals_from_sg(fsf_req, - SBAL_FLAGS0_TYPE_WRITE_READ, - els->resp, els->resp_count, - ZFCP_MAX_SBALS_PER_ELS_REQ); - if (bytes <= 0) { - ZFCP_LOG_INFO("error: creation of ELS request failed " - "(adapter %s, port d_id: 0x%06x)\n", - zfcp_get_busid_by_adapter(adapter), d_id); - if (bytes == 0) { - ret = -ENOMEM; - } else { - ret = bytes; - } - goto failed_send; - } - fsf_req->qtcb->bottom.support.resp_buf_length = bytes; - } else { - /* reject request */ - ZFCP_LOG_INFO("error: microcode does not support chained SBALs" - ", ELS request too big (adapter %s, " - "port d_id: 0x%06x)\n", - zfcp_get_busid_by_adapter(adapter), d_id); - ret = -EOPNOTSUPP; - goto failed_send; - } - - /* settings in QTCB */ - fsf_req->qtcb->bottom.support.d_id = d_id; - fsf_req->qtcb->bottom.support.service_class = - ZFCP_FC_SERVICE_CLASS_DEFAULT; - fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT; - fsf_req->data = (unsigned long) els; - - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); - - zfcp_san_dbf_event_els_request(fsf_req); - - zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); - ret = zfcp_fsf_req_send(fsf_req); - if (ret) { - ZFCP_LOG_DEBUG("error: initiation of ELS request failed " - "(adapter %s, port d_id: 0x%06x)\n", - zfcp_get_busid_by_adapter(adapter), d_id); + ret = zfcp_fsf_setup_sbals(req, ct->req, ct->resp, + FSF_MAX_SBALS_PER_REQ); + if (ret) goto failed_send; - } - ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: " - "0x%06x)\n", zfcp_get_busid_by_adapter(adapter), d_id); - goto out; + req->handler = zfcp_fsf_send_ct_handler; + req->qtcb->header.port_handle = port->handle; + req->qtcb->bottom.support.service_class = FSF_CLASS_3; + req->qtcb->bottom.support.timeout = ct->timeout; + req->data = ct; - port_blocked: - failed_send: - zfcp_fsf_req_free(fsf_req); + zfcp_san_dbf_event_ct_request(req); - failed_req: - out: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); + if (erp_action) { + erp_action->fsf_req = req; + req->erp_action = erp_action; + zfcp_fsf_start_erp_timer(req); + } else + zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); + + ret = zfcp_fsf_req_send(req); + if (ret) + goto failed_send; + + goto out; - return ret; +failed_send: + zfcp_fsf_req_free(req); + if (erp_action) + erp_action->fsf_req = NULL; +out: + spin_unlock(&adapter->req_q.lock); + return ret; } -/** - * zfcp_fsf_send_els_handler - handler for ELS commands - * @fsf_req: pointer to struct zfcp_fsf_req - * - * Data specific for the ELS command is passed using - * fsf_req->data. There we find the pointer to struct zfcp_send_els. - * Usually a specific handler for the ELS command is called which is - * found in this structure. - */ -static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req) { - struct zfcp_adapter *adapter; - struct zfcp_port *port; - u32 d_id; - struct fsf_qtcb_header *header; - struct fsf_qtcb_bottom_support *bottom; - struct zfcp_send_els *send_els; - int retval = -EINVAL; - u16 subtable, rule, counter; - - send_els = (struct zfcp_send_els *) fsf_req->data; - adapter = send_els->adapter; - port = send_els->port; - d_id = send_els->d_id; - header = &fsf_req->qtcb->header; - bottom = &fsf_req->qtcb->bottom.support; - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) + struct zfcp_send_els *send_els = req->data; + struct zfcp_port *port = send_els->port; + struct fsf_qtcb_header *header = &req->qtcb->header; + + send_els->status = -EINVAL; + + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) goto skip_fsfstatus; switch (header->fsf_status) { - case FSF_GOOD: - zfcp_san_dbf_event_els_response(fsf_req); - retval = 0; + zfcp_san_dbf_event_els_response(req); + send_els->status = 0; break; - case FSF_SERVICE_CLASS_NOT_SUPPORTED: - ZFCP_LOG_INFO("error: adapter %s does not support fc " - "class %d.\n", - zfcp_get_busid_by_adapter(adapter), - ZFCP_FC_SERVICE_CLASS_DEFAULT); - /* stop operation for this adapter */ - zfcp_erp_adapter_shutdown(adapter, 0, 124, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_fsf_class_not_supp(req); break; - case FSF_ADAPTER_STATUS_AVAILABLE: switch (header->fsf_status_qual.word[0]){ case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: if (port && (send_els->ls_code != ZFCP_LS_ADISC)) zfcp_test_link(port); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; + /*fall through */ case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = - zfcp_handle_els_rjt(header->fsf_status_qual.word[1], - (struct zfcp_ls_rjt_par *) - &header->fsf_status_qual.word[2]); - break; case FSF_SQ_RETRY_IF_POSSIBLE: - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - default: - ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n", - header->fsf_status_qual.word[0]); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, - (char*)header->fsf_status_qual.word, 16); } break; - case FSF_ELS_COMMAND_REJECTED: - ZFCP_LOG_INFO("ELS has been rejected because command filter " - "prohibited sending " - "(adapter: %s, port d_id: 0x%06x)\n", - zfcp_get_busid_by_adapter(adapter), d_id); - - break; - case FSF_PAYLOAD_SIZE_MISMATCH: - ZFCP_LOG_INFO( - "ELS request size and ELS response size must be either " - "both 0, or both greater than 0 " - "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n", - zfcp_get_busid_by_adapter(adapter), - bottom->req_buf_length, - bottom->resp_buf_length); - break; - case FSF_REQUEST_SIZE_TOO_LARGE: - ZFCP_LOG_INFO( - "Length of the ELS request buffer, " - "specified in QTCB bottom, " - "exceeds the size of the buffers " - "that have been allocated for ELS request data " - "(adapter: %s, req_buf_length=%d)\n", - zfcp_get_busid_by_adapter(adapter), - bottom->req_buf_length); - break; - case FSF_RESPONSE_SIZE_TOO_LARGE: - ZFCP_LOG_INFO( - "Length of the ELS response buffer, " - "specified in QTCB bottom, " - "exceeds the size of the buffers " - "that have been allocated for ELS response data " - "(adapter: %s, resp_buf_length=%d)\n", - zfcp_get_busid_by_adapter(adapter), - bottom->resp_buf_length); - break; - - case FSF_SBAL_MISMATCH: - /* should never occure, avoided in zfcp_fsf_send_els */ - ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, " - "resp_buf_length=%d)\n", - zfcp_get_busid_by_adapter(adapter), - bottom->req_buf_length, bottom->resp_buf_length); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_ACCESS_DENIED: - ZFCP_LOG_NORMAL("access denied, cannot send ELS command " - "(adapter %s, port d_id=0x%06x)\n", - zfcp_get_busid_by_adapter(adapter), d_id); - for (counter = 0; counter < 2; counter++) { - subtable = header->fsf_status_qual.halfword[counter * 2]; - rule = header->fsf_status_qual.halfword[counter * 2 + 1]; - switch (subtable) { - case FSF_SQ_CFDC_SUBTABLE_OS: - case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: - case FSF_SQ_CFDC_SUBTABLE_PORT_DID: - case FSF_SQ_CFDC_SUBTABLE_LUN: - ZFCP_LOG_INFO("Access denied (%s rule %d)\n", - zfcp_act_subtable_type[subtable], rule); - break; - } - } - if (port != NULL) - zfcp_erp_port_access_denied(port, 56, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_fsf_access_denied_port(req, port); break; - + case FSF_SBAL_MISMATCH: + /* should never occure, avoided in zfcp_fsf_send_els */ + /* fall through */ default: - ZFCP_LOG_NORMAL( - "bug: An unknown FSF Status was presented " - "(adapter: %s, fsf_status=0x%08x)\n", - zfcp_get_busid_by_adapter(adapter), - header->fsf_status); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } - skip_fsfstatus: - send_els->status = retval; - if (send_els->handler) send_els->handler(send_els->handler_data); +} - return retval; +/** + * zfcp_fsf_send_els - initiate an ELS command (FC-FS) + * @els: pointer to struct zfcp_send_els with data for the command + */ +int zfcp_fsf_send_els(struct zfcp_send_els *els) +{ + struct zfcp_fsf_req *req; + struct zfcp_adapter *adapter = els->adapter; + struct fsf_qtcb_bottom_support *bottom; + int ret = -EIO; + + if (unlikely(!(atomic_read(&els->port->status) & + ZFCP_STATUS_COMMON_UNBLOCKED))) + return -EBUSY; + + spin_lock(&adapter->req_q.lock); + if (!atomic_read(&adapter->req_q.count)) + goto out; + req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS, + ZFCP_REQ_AUTO_CLEANUP, NULL); + if (unlikely(IS_ERR(req))) { + ret = PTR_ERR(req); + goto out; + } + + ret = zfcp_fsf_setup_sbals(req, els->req, els->resp, + FSF_MAX_SBALS_PER_ELS_REQ); + if (ret) + goto failed_send; + + bottom = &req->qtcb->bottom.support; + req->handler = zfcp_fsf_send_els_handler; + bottom->d_id = els->d_id; + bottom->service_class = FSF_CLASS_3; + bottom->timeout = 2 * R_A_TOV; + req->data = els; + + zfcp_san_dbf_event_els_request(req); + + zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); + ret = zfcp_fsf_req_send(req); + if (ret) + goto failed_send; + + goto out; + +failed_send: + zfcp_fsf_req_free(req); +out: + spin_unlock(&adapter->req_q.lock); + return ret; } -int -zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) +int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) { volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; + struct zfcp_fsf_req *req; struct zfcp_adapter *adapter = erp_action->adapter; - unsigned long lock_flags; - int retval; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(adapter, - FSF_QTCB_EXCHANGE_CONFIG_DATA, - ZFCP_REQ_AUTO_CLEANUP, - adapter->pool.fsf_req_erp, - &lock_flags, &fsf_req); - if (retval) { - ZFCP_LOG_INFO("error: Could not create exchange configuration " - "data request for adapter %s.\n", - zfcp_get_busid_by_adapter(adapter)); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); - return retval; + int retval = -EIO; + + spin_lock(&adapter->req_q.lock); + if (!atomic_read(&adapter->req_q.count)) + goto out; + req = zfcp_fsf_req_create(adapter, + FSF_QTCB_EXCHANGE_CONFIG_DATA, + ZFCP_REQ_AUTO_CLEANUP, + adapter->pool.fsf_req_erp); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); + goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + sbale = zfcp_qdio_sbale_req(req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - fsf_req->qtcb->bottom.config.feature_selection = + req->qtcb->bottom.config.feature_selection = FSF_FEATURE_CFDC | FSF_FEATURE_LUN_SHARING | FSF_FEATURE_NOTIFICATION_LOST | FSF_FEATURE_UPDATE_ALERT; - fsf_req->erp_action = erp_action; - erp_action->fsf_req = fsf_req; + req->erp_action = erp_action; + req->handler = zfcp_fsf_exchange_config_data_handler; + erp_action->fsf_req = req; - zfcp_erp_start_timer(fsf_req); - retval = zfcp_fsf_req_send(fsf_req); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); + zfcp_fsf_start_erp_timer(req); + retval = zfcp_fsf_req_send(req); if (retval) { - ZFCP_LOG_INFO("error: Could not send exchange configuration " - "data command on the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_fsf_req_free(fsf_req); + zfcp_fsf_req_free(req); erp_action->fsf_req = NULL; } - else - ZFCP_LOG_DEBUG("exchange configuration data request initiated " - "(adapter %s)\n", - zfcp_get_busid_by_adapter(adapter)); - +out: + spin_unlock(&adapter->req_q.lock); return retval; } -int -zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter, - struct fsf_qtcb_bottom_config *data) +int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter, + struct fsf_qtcb_bottom_config *data) { volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; - unsigned long lock_flags; - int retval; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA, - ZFCP_WAIT_FOR_SBAL, NULL, &lock_flags, - &fsf_req); - if (retval) { - ZFCP_LOG_INFO("error: Could not create exchange configuration " - "data request for adapter %s.\n", - zfcp_get_busid_by_adapter(adapter)); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); - return retval; + struct zfcp_fsf_req *req = NULL; + int retval = -EIO; + + spin_lock(&adapter->req_q.lock); + if (zfcp_fsf_req_sbal_get(adapter)) + goto out; + + req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA, + 0, NULL); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); + goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + sbale = zfcp_qdio_sbale_req(req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + req->handler = zfcp_fsf_exchange_config_data_handler; - fsf_req->qtcb->bottom.config.feature_selection = + req->qtcb->bottom.config.feature_selection = FSF_FEATURE_CFDC | FSF_FEATURE_LUN_SHARING | FSF_FEATURE_NOTIFICATION_LOST | FSF_FEATURE_UPDATE_ALERT; if (data) - fsf_req->data = (unsigned long) data; + req->data = data; - zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); - retval = zfcp_fsf_req_send(fsf_req); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); - if (retval) - ZFCP_LOG_INFO("error: Could not send exchange configuration " - "data command on the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - else - wait_event(fsf_req->completion_wq, - fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); + zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); + retval = zfcp_fsf_req_send(req); +out: + spin_unlock(&adapter->req_q.lock); + if (!retval) + wait_event(req->completion_wq, + req->status & ZFCP_STATUS_FSFREQ_COMPLETED); - zfcp_fsf_req_free(fsf_req); + zfcp_fsf_req_free(req); return retval; } /** - * zfcp_fsf_exchange_config_evaluate - * @fsf_req: fsf_req which belongs to xchg config data request - * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1) - * - * returns: -EIO on error, 0 otherwise - */ -static int -zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok) -{ - struct fsf_qtcb_bottom_config *bottom; - struct zfcp_adapter *adapter = fsf_req->adapter; - struct Scsi_Host *shost = adapter->scsi_host; - - bottom = &fsf_req->qtcb->bottom.config; - ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n", - bottom->low_qtcb_version, bottom->high_qtcb_version); - adapter->fsf_lic_version = bottom->lic_version; - adapter->adapter_features = bottom->adapter_features; - adapter->connection_features = bottom->connection_features; - adapter->peer_wwpn = 0; - adapter->peer_wwnn = 0; - adapter->peer_d_id = 0; - - if (xchg_ok) { - - if (fsf_req->data) - memcpy((struct fsf_qtcb_bottom_config *) fsf_req->data, - bottom, sizeof (struct fsf_qtcb_bottom_config)); - - fc_host_node_name(shost) = bottom->nport_serv_param.wwnn; - fc_host_port_name(shost) = bottom->nport_serv_param.wwpn; - fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK; - fc_host_speed(shost) = bottom->fc_link_speed; - fc_host_supported_classes(shost) = - FC_COS_CLASS2 | FC_COS_CLASS3; - adapter->hydra_version = bottom->adapter_type; - if (fc_host_permanent_port_name(shost) == -1) - fc_host_permanent_port_name(shost) = - fc_host_port_name(shost); - if (bottom->fc_topology == FSF_TOPO_P2P) { - adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK; - adapter->peer_wwpn = bottom->plogi_payload.wwpn; - adapter->peer_wwnn = bottom->plogi_payload.wwnn; - fc_host_port_type(shost) = FC_PORTTYPE_PTP; - } else if (bottom->fc_topology == FSF_TOPO_FABRIC) - fc_host_port_type(shost) = FC_PORTTYPE_NPORT; - else if (bottom->fc_topology == FSF_TOPO_AL) - fc_host_port_type(shost) = FC_PORTTYPE_NLPORT; - else - fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; - } else { - fc_host_node_name(shost) = 0; - fc_host_port_name(shost) = 0; - fc_host_port_id(shost) = 0; - fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; - fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; - adapter->hydra_version = 0; - } - - if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) { - adapter->hardware_version = bottom->hardware_version; - memcpy(fc_host_serial_number(shost), bottom->serial_number, - min(FC_SERIAL_NUMBER_SIZE, 17)); - EBCASC(fc_host_serial_number(shost), - min(FC_SERIAL_NUMBER_SIZE, 17)); - } - - if (fsf_req->erp_action) - ZFCP_LOG_NORMAL("The adapter %s reported the following " - "characteristics:\n" - "WWNN 0x%016Lx, WWPN 0x%016Lx, " - "S_ID 0x%06x,\n" - "adapter version 0x%x, " - "LIC version 0x%x, " - "FC link speed %d Gb/s\n", - zfcp_get_busid_by_adapter(adapter), - (wwn_t) fc_host_node_name(shost), - (wwn_t) fc_host_port_name(shost), - fc_host_port_id(shost), - adapter->hydra_version, - adapter->fsf_lic_version, - fc_host_speed(shost)); - if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) { - ZFCP_LOG_NORMAL("error: the adapter %s " - "only supports newer control block " - "versions in comparison to this device " - "driver (try updated device driver)\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_shutdown(adapter, 0, 125, fsf_req); - return -EIO; - } - if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) { - ZFCP_LOG_NORMAL("error: the adapter %s " - "only supports older control block " - "versions than this device driver uses" - "(consider a microcode upgrade)\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_shutdown(adapter, 0, 126, fsf_req); - return -EIO; - } - return 0; -} - -/** - * function: zfcp_fsf_exchange_config_data_handler - * - * purpose: is called for finished Exchange Configuration Data command - * - * returns: - */ -static int -zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req) -{ - struct fsf_qtcb_bottom_config *bottom; - struct zfcp_adapter *adapter = fsf_req->adapter; - struct fsf_qtcb *qtcb = fsf_req->qtcb; - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) - return -EIO; - - switch (qtcb->header.fsf_status) { - - case FSF_GOOD: - if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1)) - return -EIO; - - switch (fc_host_port_type(adapter->scsi_host)) { - case FC_PORTTYPE_PTP: - ZFCP_LOG_NORMAL("Point-to-Point fibrechannel " - "configuration detected at adapter %s\n" - "Peer WWNN 0x%016llx, " - "peer WWPN 0x%016llx, " - "peer d_id 0x%06x\n", - zfcp_get_busid_by_adapter(adapter), - adapter->peer_wwnn, - adapter->peer_wwpn, - adapter->peer_d_id); - break; - case FC_PORTTYPE_NLPORT: - ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel " - "topology detected at adapter %s " - "unsupported, shutting down adapter\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_shutdown(adapter, 0, 127, fsf_req); - return -EIO; - case FC_PORTTYPE_NPORT: - if (fsf_req->erp_action) - ZFCP_LOG_NORMAL("Switched fabric fibrechannel " - "network detected at adapter " - "%s.\n", - zfcp_get_busid_by_adapter(adapter)); - break; - default: - ZFCP_LOG_NORMAL("bug: The fibrechannel topology " - "reported by the exchange " - "configuration command for " - "the adapter %s is not " - "of a type known to the zfcp " - "driver, shutting down adapter\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_shutdown(adapter, 0, 128, fsf_req); - return -EIO; - } - bottom = &qtcb->bottom.config; - if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) { - ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) " - "allowed by the adapter %s " - "is lower than the minimum " - "required by the driver (%ld bytes).\n", - bottom->max_qtcb_size, - zfcp_get_busid_by_adapter(adapter), - sizeof(struct fsf_qtcb)); - zfcp_erp_adapter_shutdown(adapter, 0, 129, fsf_req); - return -EIO; - } - atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, - &adapter->status); - break; - case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: - if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0)) - return -EIO; - - atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, - &adapter->status); - - zfcp_fsf_link_down_info_eval(fsf_req, 42, - &qtcb->header.fsf_status_qual.link_down_info); - break; - default: - zfcp_erp_adapter_shutdown(adapter, 0, 130, fsf_req); - return -EIO; - } - return 0; -} - -/** * zfcp_fsf_exchange_port_data - request information about local port * @erp_action: ERP action for the adapter for which port data is requested + * Returns: 0 on success, error otherwise */ -int -zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action) +int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action) { volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; + struct zfcp_fsf_req *req; struct zfcp_adapter *adapter = erp_action->adapter; - unsigned long lock_flags; - int retval; + int retval = -EIO; - if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) { - ZFCP_LOG_INFO("error: exchange port data " - "command not supported by adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); + if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) return -EOPNOTSUPP; - } - /* setup new FSF request */ - retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, - ZFCP_REQ_AUTO_CLEANUP, - adapter->pool.fsf_req_erp, - &lock_flags, &fsf_req); - if (retval) { - ZFCP_LOG_INFO("error: Out of resources. Could not create an " - "exchange port data request for " - "the adapter %s.\n", - zfcp_get_busid_by_adapter(adapter)); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); - return retval; + spin_lock(&adapter->req_q.lock); + if (!atomic_read(&adapter->req_q.count)) + goto out; + req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, + ZFCP_REQ_AUTO_CLEANUP, + adapter->pool.fsf_req_erp); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); + goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + sbale = zfcp_qdio_sbale_req(req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - erp_action->fsf_req = fsf_req; - fsf_req->erp_action = erp_action; - zfcp_erp_start_timer(fsf_req); - - retval = zfcp_fsf_req_send(fsf_req); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); + req->handler = zfcp_fsf_exchange_port_data_handler; + req->erp_action = erp_action; + erp_action->fsf_req = req; + zfcp_fsf_start_erp_timer(req); + retval = zfcp_fsf_req_send(req); if (retval) { - ZFCP_LOG_INFO("error: Could not send an exchange port data " - "command on the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_fsf_req_free(fsf_req); + zfcp_fsf_req_free(req); erp_action->fsf_req = NULL; } - else - ZFCP_LOG_DEBUG("exchange port data request initiated " - "(adapter %s)\n", - zfcp_get_busid_by_adapter(adapter)); +out: + spin_unlock(&adapter->req_q.lock); return retval; } - /** * zfcp_fsf_exchange_port_data_sync - request information about local port - * and wait until information is ready + * @adapter: pointer to struct zfcp_adapter + * @data: pointer to struct fsf_qtcb_bottom_port + * Returns: 0 on success, error otherwise */ -int -zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter, - struct fsf_qtcb_bottom_port *data) +int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter, + struct fsf_qtcb_bottom_port *data) { volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; - unsigned long lock_flags; - int retval; - - if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) { - ZFCP_LOG_INFO("error: exchange port data " - "command not supported by adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); + struct zfcp_fsf_req *req = NULL; + int retval = -EIO; + + if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) return -EOPNOTSUPP; - } - /* setup new FSF request */ - retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, - 0, NULL, &lock_flags, &fsf_req); - if (retval) { - ZFCP_LOG_INFO("error: Out of resources. Could not create an " - "exchange port data request for " - "the adapter %s.\n", - zfcp_get_busid_by_adapter(adapter)); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); - return retval; + spin_lock(&adapter->req_q.lock); + if (!atomic_read(&adapter->req_q.count)) + goto out; + + req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0, + NULL); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); + goto out; } if (data) - fsf_req->data = (unsigned long) data; + req->data = data; - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + sbale = zfcp_qdio_sbale_req(req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); - retval = zfcp_fsf_req_send(fsf_req); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); - - if (retval) - ZFCP_LOG_INFO("error: Could not send an exchange port data " - "command on the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - else - wait_event(fsf_req->completion_wq, - fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); - - zfcp_fsf_req_free(fsf_req); - - return retval; -} - -/** - * zfcp_fsf_exchange_port_evaluate - * @fsf_req: fsf_req which belongs to xchg port data request - * @xchg_ok: specifies if xchg port data was incomplete or complete (0/1) - */ -static void -zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok) -{ - struct zfcp_adapter *adapter; - struct fsf_qtcb_bottom_port *bottom; - struct Scsi_Host *shost; - - adapter = fsf_req->adapter; - bottom = &fsf_req->qtcb->bottom.port; - shost = adapter->scsi_host; - - if (fsf_req->data) - memcpy((struct fsf_qtcb_bottom_port*) fsf_req->data, bottom, - sizeof(struct fsf_qtcb_bottom_port)); - - if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) - fc_host_permanent_port_name(shost) = bottom->wwpn; - else - fc_host_permanent_port_name(shost) = fc_host_port_name(shost); - fc_host_maxframe_size(shost) = bottom->maximum_frame_size; - fc_host_supported_speeds(shost) = bottom->supported_speed; -} - -/** - * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request - * @fsf_req: pointer to struct zfcp_fsf_req - */ -static void -zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req) -{ - struct zfcp_adapter *adapter; - struct fsf_qtcb *qtcb; - - adapter = fsf_req->adapter; - qtcb = fsf_req->qtcb; - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) - return; - - switch (qtcb->header.fsf_status) { - case FSF_GOOD: - zfcp_fsf_exchange_port_evaluate(fsf_req, 1); - atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); - break; - case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: - zfcp_fsf_exchange_port_evaluate(fsf_req, 0); - atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); - zfcp_fsf_link_down_info_eval(fsf_req, 43, - &qtcb->header.fsf_status_qual.link_down_info); - break; - } -} - - -/* - * function: zfcp_fsf_open_port - * - * purpose: - * - * returns: address of initiated FSF request - * NULL - request could not be initiated - */ -int -zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) -{ - volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; - unsigned long lock_flags; - int retval = 0; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(erp_action->adapter, - FSF_QTCB_OPEN_PORT_WITH_DID, - ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, - erp_action->adapter->pool.fsf_req_erp, - &lock_flags, &fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("error: Could not create open port request " - "for port 0x%016Lx on adapter %s.\n", - erp_action->port->wwpn, - zfcp_get_busid_by_adapter(erp_action->adapter)); - goto out; - } - - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); - sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - - fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id; - atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status); - fsf_req->data = (unsigned long) erp_action->port; - fsf_req->erp_action = erp_action; - erp_action->fsf_req = fsf_req; - - zfcp_erp_start_timer(fsf_req); - retval = zfcp_fsf_req_send(fsf_req); - if (retval) { - ZFCP_LOG_INFO("error: Could not send open port request for " - "port 0x%016Lx on adapter %s.\n", - erp_action->port->wwpn, - zfcp_get_busid_by_adapter(erp_action->adapter)); - zfcp_fsf_req_free(fsf_req); - erp_action->fsf_req = NULL; - goto out; - } + req->handler = zfcp_fsf_exchange_port_data_handler; + zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); + retval = zfcp_fsf_req_send(req); +out: + spin_unlock(&adapter->req_q.lock); + if (!retval) + wait_event(req->completion_wq, + req->status & ZFCP_STATUS_FSFREQ_COMPLETED); + zfcp_fsf_req_free(req); - ZFCP_LOG_DEBUG("open port request initiated " - "(adapter %s, port 0x%016Lx)\n", - zfcp_get_busid_by_adapter(erp_action->adapter), - erp_action->port->wwpn); - out: - write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, - lock_flags); return retval; } -/* - * function: zfcp_fsf_open_port_handler - * - * purpose: is called for finished Open Port command - * - * returns: - */ -static int -zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req) { - int retval = -EINVAL; - struct zfcp_port *port; + struct zfcp_port *port = req->data; + struct fsf_qtcb_header *header = &req->qtcb->header; struct fsf_plogi *plogi; - struct fsf_qtcb_header *header; - u16 subtable, rule, counter; - port = (struct zfcp_port *) fsf_req->data; - header = &fsf_req->qtcb->header; - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { - /* don't change port status in our bookkeeping */ + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) goto skip_fsfstatus; - } - /* evaluate FSF status in QTCB */ switch (header->fsf_status) { - case FSF_PORT_ALREADY_OPEN: - ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s " - "is already open.\n", - port->wwpn, zfcp_get_busid_by_port(port)); - /* - * This is a bug, however operation should continue normally - * if it is simply ignored - */ break; - case FSF_ACCESS_DENIED: - ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx " - "on adapter %s\n", - port->wwpn, zfcp_get_busid_by_port(port)); - for (counter = 0; counter < 2; counter++) { - subtable = header->fsf_status_qual.halfword[counter * 2]; - rule = header->fsf_status_qual.halfword[counter * 2 + 1]; - switch (subtable) { - case FSF_SQ_CFDC_SUBTABLE_OS: - case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: - case FSF_SQ_CFDC_SUBTABLE_PORT_DID: - case FSF_SQ_CFDC_SUBTABLE_LUN: - ZFCP_LOG_INFO("Access denied (%s rule %d)\n", - zfcp_act_subtable_type[subtable], rule); - break; - } - } - zfcp_erp_port_access_denied(port, 57, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_fsf_access_denied_port(req, port); break; - case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED: - ZFCP_LOG_INFO("error: The FSF adapter is out of resources. " - "The remote port 0x%016Lx on adapter %s " - "could not be opened. Disabling it.\n", - port->wwpn, zfcp_get_busid_by_port(port)); - zfcp_erp_port_failed(port, 31, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + dev_warn(&req->adapter->ccw_device->dev, + "The adapter is out of resources. The remote port " + "0x%016Lx could not be opened, disabling it.\n", + port->wwpn); + zfcp_erp_port_failed(port, 31, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_ADAPTER_STATUS_AVAILABLE: switch (header->fsf_status_qual.word[0]) { case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: - /* ERP strategy will escalate */ - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - /* ERP strategy will escalate */ - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; case FSF_SQ_NO_RETRY_POSSIBLE: - ZFCP_LOG_NORMAL("The remote port 0x%016Lx on " - "adapter %s could not be opened. " - "Disabling it.\n", - port->wwpn, - zfcp_get_busid_by_port(port)); - zfcp_erp_port_failed(port, 32, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - default: - ZFCP_LOG_NORMAL - ("bug: Wrong status qualifier 0x%x arrived.\n", - header->fsf_status_qual.word[0]); + dev_warn(&req->adapter->ccw_device->dev, + "The remote port 0x%016Lx could not be " + "opened. Disabling it.\n", port->wwpn); + zfcp_erp_port_failed(port, 32, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } break; - case FSF_GOOD: - /* save port handle assigned by FSF */ port->handle = header->port_handle; - ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s " - "was opened, it's port handle is 0x%x\n", - port->wwpn, zfcp_get_busid_by_port(port), - port->handle); - /* mark port as open */ atomic_set_mask(ZFCP_STATUS_COMMON_OPEN | ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | ZFCP_STATUS_COMMON_ACCESS_BOXED, &port->status); - retval = 0; /* check whether D_ID has changed during open */ /* * FIXME: This check is not airtight, as the FCP channel does @@ -2526,320 +1496,168 @@ zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req) * another GID_PN straight after a port has been opened. * Alternately, an ADISC/PDISC ELS should suffice, as well. */ - plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els; - if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status)) - { - if (fsf_req->qtcb->bottom.support.els1_length < - sizeof (struct fsf_plogi)) { - ZFCP_LOG_INFO( - "warning: insufficient length of " - "PLOGI payload (%i)\n", - fsf_req->qtcb->bottom.support.els1_length); - /* skip sanity check and assume wwpn is ok */ - } else { - if (plogi->serv_param.wwpn != port->wwpn) { - ZFCP_LOG_INFO("warning: d_id of port " - "0x%016Lx changed during " - "open\n", port->wwpn); - atomic_clear_mask( - ZFCP_STATUS_PORT_DID_DID, - &port->status); - } else { - port->wwnn = plogi->serv_param.wwnn; - zfcp_plogi_evaluate(port, plogi); - } + if (atomic_read(&port->status) & ZFCP_STATUS_PORT_NO_WWPN) + break; + + plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els; + if (req->qtcb->bottom.support.els1_length >= sizeof(*plogi)) { + if (plogi->serv_param.wwpn != port->wwpn) + atomic_clear_mask(ZFCP_STATUS_PORT_DID_DID, + &port->status); + else { + port->wwnn = plogi->serv_param.wwnn; + zfcp_fc_plogi_evaluate(port, plogi); } } break; - case FSF_UNKNOWN_OP_SUBTYPE: - /* should never occure, subtype not set in zfcp_fsf_open_port */ - ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, " - "op_subtype=0x%x)\n", - zfcp_get_busid_by_port(port), - fsf_req->qtcb->bottom.support.operation_subtype); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - default: - ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " - "(debug info 0x%x)\n", - header->fsf_status); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } - skip_fsfstatus: +skip_fsfstatus: atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status); - return retval; } -/* - * function: zfcp_fsf_close_port - * - * purpose: submit FSF command "close port" - * - * returns: address of initiated FSF request - * NULL - request could not be initiated +/** + * zfcp_fsf_open_port - create and send open port request + * @erp_action: pointer to struct zfcp_erp_action + * Returns: 0 on success, error otherwise */ -int -zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) +int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) { volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; - unsigned long lock_flags; - int retval = 0; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(erp_action->adapter, - FSF_QTCB_CLOSE_PORT, - ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, - erp_action->adapter->pool.fsf_req_erp, - &lock_flags, &fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("error: Could not create a close port request " - "for port 0x%016Lx on adapter %s.\n", - erp_action->port->wwpn, - zfcp_get_busid_by_adapter(erp_action->adapter)); + struct zfcp_adapter *adapter = erp_action->adapter; + struct zfcp_fsf_req *req; + int retval = -EIO; + + spin_lock(&adapter->req_q.lock); + if (zfcp_fsf_req_sbal_get(adapter)) + goto out; + + req = zfcp_fsf_req_create(adapter, + FSF_QTCB_OPEN_PORT_WITH_DID, + ZFCP_REQ_AUTO_CLEANUP, + adapter->pool.fsf_req_erp); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + sbale = zfcp_qdio_sbale_req(req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status); - fsf_req->data = (unsigned long) erp_action->port; - fsf_req->erp_action = erp_action; - fsf_req->qtcb->header.port_handle = erp_action->port->handle; - fsf_req->erp_action = erp_action; - erp_action->fsf_req = fsf_req; - - zfcp_erp_start_timer(fsf_req); - retval = zfcp_fsf_req_send(fsf_req); + req->handler = zfcp_fsf_open_port_handler; + req->qtcb->bottom.support.d_id = erp_action->port->d_id; + req->data = erp_action->port; + req->erp_action = erp_action; + erp_action->fsf_req = req; + atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status); + + zfcp_fsf_start_erp_timer(req); + retval = zfcp_fsf_req_send(req); if (retval) { - ZFCP_LOG_INFO("error: Could not send a close port request for " - "port 0x%016Lx on adapter %s.\n", - erp_action->port->wwpn, - zfcp_get_busid_by_adapter(erp_action->adapter)); - zfcp_fsf_req_free(fsf_req); + zfcp_fsf_req_free(req); erp_action->fsf_req = NULL; - goto out; } - - ZFCP_LOG_TRACE("close port request initiated " - "(adapter %s, port 0x%016Lx)\n", - zfcp_get_busid_by_adapter(erp_action->adapter), - erp_action->port->wwpn); - out: - write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, - lock_flags); +out: + spin_unlock(&adapter->req_q.lock); return retval; } -/* - * function: zfcp_fsf_close_port_handler - * - * purpose: is called for finished Close Port FSF command - * - * returns: - */ -static int -zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req) { - int retval = -EINVAL; - struct zfcp_port *port; + struct zfcp_port *port = req->data; - port = (struct zfcp_port *) fsf_req->data; - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { - /* don't change port status in our bookkeeping */ + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) goto skip_fsfstatus; - } - - /* evaluate FSF status in QTCB */ - switch (fsf_req->qtcb->header.fsf_status) { + switch (req->qtcb->header.fsf_status) { case FSF_PORT_HANDLE_NOT_VALID: - ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " - "0x%016Lx on adapter %s invalid. This may happen " - "occasionally.\n", port->handle, - port->wwpn, zfcp_get_busid_by_port(port)); - ZFCP_LOG_DEBUG("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &fsf_req->qtcb->header.fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_adapter_reopen(port->adapter, 0, 107, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_erp_adapter_reopen(port->adapter, 0, 107, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_ADAPTER_STATUS_AVAILABLE: - /* Note: FSF has actually closed the port in this case. - * The status code is just daft. Fingers crossed for a change - */ - retval = 0; break; - case FSF_GOOD: - ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, " - "port handle 0x%x\n", port->wwpn, - zfcp_get_busid_by_port(port), port->handle); - zfcp_erp_modify_port_status(port, 33, fsf_req, + zfcp_erp_modify_port_status(port, 33, req, ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR); - retval = 0; - break; - - default: - ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " - "(debug info 0x%x)\n", - fsf_req->qtcb->header.fsf_status); break; } - skip_fsfstatus: +skip_fsfstatus: atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status); - return retval; } -/* - * function: zfcp_fsf_close_physical_port - * - * purpose: submit FSF command "close physical port" - * - * returns: address of initiated FSF request - * NULL - request could not be initiated +/** + * zfcp_fsf_close_port - create and send close port request + * @erp_action: pointer to struct zfcp_erp_action + * Returns: 0 on success, error otherwise */ -int -zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) +int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) { volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; - unsigned long lock_flags; - int retval = 0; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(erp_action->adapter, - FSF_QTCB_CLOSE_PHYSICAL_PORT, - ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, - erp_action->adapter->pool.fsf_req_erp, - &lock_flags, &fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("error: Could not create close physical port " - "request (adapter %s, port 0x%016Lx)\n", - zfcp_get_busid_by_adapter(erp_action->adapter), - erp_action->port->wwpn); + struct zfcp_adapter *adapter = erp_action->adapter; + struct zfcp_fsf_req *req; + int retval = -EIO; + spin_lock(&adapter->req_q.lock); + if (zfcp_fsf_req_sbal_get(adapter)) + goto out; + + req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT, + ZFCP_REQ_AUTO_CLEANUP, + adapter->pool.fsf_req_erp); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + sbale = zfcp_qdio_sbale_req(req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - /* mark port as being closed */ - atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, - &erp_action->port->status); - /* save a pointer to this port */ - fsf_req->data = (unsigned long) erp_action->port; - fsf_req->qtcb->header.port_handle = erp_action->port->handle; - fsf_req->erp_action = erp_action; - erp_action->fsf_req = fsf_req; - - zfcp_erp_start_timer(fsf_req); - retval = zfcp_fsf_req_send(fsf_req); + req->handler = zfcp_fsf_close_port_handler; + req->data = erp_action->port; + req->erp_action = erp_action; + req->qtcb->header.port_handle = erp_action->port->handle; + erp_action->fsf_req = req; + atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status); + + zfcp_fsf_start_erp_timer(req); + retval = zfcp_fsf_req_send(req); if (retval) { - ZFCP_LOG_INFO("error: Could not send close physical port " - "request (adapter %s, port 0x%016Lx)\n", - zfcp_get_busid_by_adapter(erp_action->adapter), - erp_action->port->wwpn); - zfcp_fsf_req_free(fsf_req); + zfcp_fsf_req_free(req); erp_action->fsf_req = NULL; - goto out; } - - ZFCP_LOG_TRACE("close physical port request initiated " - "(adapter %s, port 0x%016Lx)\n", - zfcp_get_busid_by_adapter(erp_action->adapter), - erp_action->port->wwpn); - out: - write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, - lock_flags); +out: + spin_unlock(&adapter->req_q.lock); return retval; } -/* - * function: zfcp_fsf_close_physical_port_handler - * - * purpose: is called for finished Close Physical Port FSF command - * - * returns: - */ -static int -zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req) { - int retval = -EINVAL; - struct zfcp_port *port; + struct zfcp_port *port = req->data; + struct fsf_qtcb_header *header = &req->qtcb->header; struct zfcp_unit *unit; - struct fsf_qtcb_header *header; - u16 subtable, rule, counter; - port = (struct zfcp_port *) fsf_req->data; - header = &fsf_req->qtcb->header; - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { - /* don't change port status in our bookkeeping */ + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) goto skip_fsfstatus; - } - /* evaluate FSF status in QTCB */ switch (header->fsf_status) { - case FSF_PORT_HANDLE_NOT_VALID: - ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid" - "(adapter %s, port 0x%016Lx). " - "This may happen occasionally.\n", - port->handle, - zfcp_get_busid_by_port(port), - port->wwpn); - ZFCP_LOG_DEBUG("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &header->fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_adapter_reopen(port->adapter, 0, 108, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_erp_adapter_reopen(port->adapter, 0, 108, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_ACCESS_DENIED: - ZFCP_LOG_NORMAL("Access denied, cannot close " - "physical port 0x%016Lx on adapter %s\n", - port->wwpn, zfcp_get_busid_by_port(port)); - for (counter = 0; counter < 2; counter++) { - subtable = header->fsf_status_qual.halfword[counter * 2]; - rule = header->fsf_status_qual.halfword[counter * 2 + 1]; - switch (subtable) { - case FSF_SQ_CFDC_SUBTABLE_OS: - case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: - case FSF_SQ_CFDC_SUBTABLE_PORT_DID: - case FSF_SQ_CFDC_SUBTABLE_LUN: - ZFCP_LOG_INFO("Access denied (%s rule %d)\n", - zfcp_act_subtable_type[subtable], rule); - break; - } - } - zfcp_erp_port_access_denied(port, 58, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_fsf_access_denied_port(req, port); break; - case FSF_PORT_BOXED: - ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter " - "%s needs to be reopened but it was attempted " - "to close it physically.\n", - port->wwpn, - zfcp_get_busid_by_port(port)); - zfcp_erp_port_boxed(port, 50, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | - ZFCP_STATUS_FSFREQ_RETRY; - + zfcp_erp_port_boxed(port, 50, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR | + ZFCP_STATUS_FSFREQ_RETRY; /* can't use generic zfcp_erp_modify_port_status because * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */ atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); @@ -2847,154 +1665,88 @@ zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req) atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); break; - case FSF_ADAPTER_STATUS_AVAILABLE: switch (header->fsf_status_qual.word[0]) { case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: - /* This will now be escalated by ERP */ - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; + /* fall through */ case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - /* ERP strategy will escalate */ - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - default: - ZFCP_LOG_NORMAL - ("bug: Wrong status qualifier 0x%x arrived.\n", - header->fsf_status_qual.word[0]); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } break; - case FSF_GOOD: - ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s " - "physically closed, port handle 0x%x\n", - port->wwpn, - zfcp_get_busid_by_port(port), port->handle); /* can't use generic zfcp_erp_modify_port_status because * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */ atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); list_for_each_entry(unit, &port->unit_list_head, list) - atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); - retval = 0; - break; - - default: - ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " - "(debug info 0x%x)\n", - header->fsf_status); + atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, + &unit->status); break; } - - skip_fsfstatus: +skip_fsfstatus: atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status); - return retval; } -/* - * function: zfcp_fsf_open_unit - * - * purpose: - * - * returns: - * - * assumptions: This routine does not check whether the associated - * remote port has already been opened. This should be - * done by calling routines. Otherwise some status - * may be presented by FSF +/** + * zfcp_fsf_close_physical_port - close physical port + * @erp_action: pointer to struct zfcp_erp_action + * Returns: 0 on success */ -int -zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) +int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) { volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; - unsigned long lock_flags; - int retval = 0; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(erp_action->adapter, - FSF_QTCB_OPEN_LUN, - ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, - erp_action->adapter->pool.fsf_req_erp, - &lock_flags, &fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("error: Could not create open unit request for " - "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n", - erp_action->unit->fcp_lun, - erp_action->unit->port->wwpn, - zfcp_get_busid_by_adapter(erp_action->adapter)); + struct zfcp_adapter *adapter = erp_action->adapter; + struct zfcp_fsf_req *req; + int retval = -EIO; + + spin_lock(&adapter->req_q.lock); + if (zfcp_fsf_req_sbal_get(adapter)) + goto out; + + req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT, + ZFCP_REQ_AUTO_CLEANUP, + adapter->pool.fsf_req_erp); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); - sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + sbale = zfcp_qdio_sbale_req(req); + sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; + sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - fsf_req->qtcb->header.port_handle = erp_action->port->handle; - fsf_req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun; - if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE)) - fsf_req->qtcb->bottom.support.option = - FSF_OPEN_LUN_SUPPRESS_BOXING; - atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status); - fsf_req->data = (unsigned long) erp_action->unit; - fsf_req->erp_action = erp_action; - erp_action->fsf_req = fsf_req; + req->data = erp_action->port; + req->qtcb->header.port_handle = erp_action->port->handle; + req->erp_action = erp_action; + req->handler = zfcp_fsf_close_physical_port_handler; + erp_action->fsf_req = req; + atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, + &erp_action->port->status); - zfcp_erp_start_timer(fsf_req); - retval = zfcp_fsf_req_send(erp_action->fsf_req); + zfcp_fsf_start_erp_timer(req); + retval = zfcp_fsf_req_send(req); if (retval) { - ZFCP_LOG_INFO("error: Could not send an open unit request " - "on the adapter %s, port 0x%016Lx for " - "unit 0x%016Lx\n", - zfcp_get_busid_by_adapter(erp_action->adapter), - erp_action->port->wwpn, - erp_action->unit->fcp_lun); - zfcp_fsf_req_free(fsf_req); + zfcp_fsf_req_free(req); erp_action->fsf_req = NULL; - goto out; } - - ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, " - "port 0x%016Lx, unit 0x%016Lx)\n", - zfcp_get_busid_by_adapter(erp_action->adapter), - erp_action->port->wwpn, erp_action->unit->fcp_lun); - out: - write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, - lock_flags); +out: + spin_unlock(&adapter->req_q.lock); return retval; } -/* - * function: zfcp_fsf_open_unit_handler - * - * purpose: is called for finished Open LUN command - * - * returns: - */ -static int -zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req) { - int retval = -EINVAL; - struct zfcp_adapter *adapter; - struct zfcp_unit *unit; - struct fsf_qtcb_header *header; - struct fsf_qtcb_bottom_support *bottom; - struct fsf_queue_designator *queue_designator; - u16 subtable, rule, counter; + struct zfcp_adapter *adapter = req->adapter; + struct zfcp_unit *unit = req->data; + struct fsf_qtcb_header *header = &req->qtcb->header; + struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support; + struct fsf_queue_designator *queue_designator = + &header->fsf_status_qual.fsf_queue_designator; int exclusive, readwrite; - unit = (struct zfcp_unit *) fsf_req->data; - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { - /* don't change unit status in our bookkeeping */ + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) goto skip_fsfstatus; - } - - adapter = fsf_req->adapter; - header = &fsf_req->qtcb->header; - bottom = &fsf_req->qtcb->bottom.support; - queue_designator = &header->fsf_status_qual.fsf_queue_designator; atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | ZFCP_STATUS_COMMON_ACCESS_BOXED | @@ -3002,155 +1754,65 @@ zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req) ZFCP_STATUS_UNIT_READONLY, &unit->status); - /* evaluate FSF status in QTCB */ switch (header->fsf_status) { case FSF_PORT_HANDLE_NOT_VALID: - ZFCP_LOG_INFO("Temporary port identifier 0x%x " - "for port 0x%016Lx on adapter %s invalid " - "This may happen occasionally\n", - unit->port->handle, - unit->port->wwpn, zfcp_get_busid_by_unit(unit)); - ZFCP_LOG_DEBUG("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &header->fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - + zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, req); + /* fall through */ case FSF_LUN_ALREADY_OPEN: - ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on " - "remote port 0x%016Lx on adapter %s twice.\n", - unit->fcp_lun, - unit->port->wwpn, zfcp_get_busid_by_unit(unit)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_ACCESS_DENIED: - ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on " - "remote port 0x%016Lx on adapter %s\n", - unit->fcp_lun, unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - for (counter = 0; counter < 2; counter++) { - subtable = header->fsf_status_qual.halfword[counter * 2]; - rule = header->fsf_status_qual.halfword[counter * 2 + 1]; - switch (subtable) { - case FSF_SQ_CFDC_SUBTABLE_OS: - case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: - case FSF_SQ_CFDC_SUBTABLE_PORT_DID: - case FSF_SQ_CFDC_SUBTABLE_LUN: - ZFCP_LOG_INFO("Access denied (%s rule %d)\n", - zfcp_act_subtable_type[subtable], rule); - break; - } - } - zfcp_erp_unit_access_denied(unit, 59, fsf_req); + zfcp_fsf_access_denied_unit(req, unit); atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); - atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); break; - case FSF_PORT_BOXED: - ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " - "needs to be reopened\n", - unit->port->wwpn, zfcp_get_busid_by_unit(unit)); - zfcp_erp_port_boxed(unit->port, 51, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | - ZFCP_STATUS_FSFREQ_RETRY; + zfcp_erp_port_boxed(unit->port, 51, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR | + ZFCP_STATUS_FSFREQ_RETRY; break; - case FSF_LUN_SHARING_VIOLATION: - if (header->fsf_status_qual.word[0] != 0) { - ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port " - "with WWPN 0x%Lx " - "connected to the adapter %s " - "is already in use in LPAR%d, CSS%d\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - queue_designator->hla, - queue_designator->cssid); - } else { - subtable = header->fsf_status_qual.halfword[4]; - rule = header->fsf_status_qual.halfword[5]; - switch (subtable) { - case FSF_SQ_CFDC_SUBTABLE_OS: - case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: - case FSF_SQ_CFDC_SUBTABLE_PORT_DID: - case FSF_SQ_CFDC_SUBTABLE_LUN: - ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the " - "remote port with WWPN 0x%Lx " - "connected to the adapter %s " - "is denied (%s rule %d)\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - zfcp_act_subtable_type[subtable], - rule); - break; - } - } - ZFCP_LOG_DEBUG("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &header->fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_unit_access_denied(unit, 60, fsf_req); + if (header->fsf_status_qual.word[0]) + dev_warn(&adapter->ccw_device->dev, + "FCP-LUN 0x%Lx at the remote port " + "with WWPN 0x%Lx " + "connected to the adapter " + "is already in use in LPAR%d, CSS%d.\n", + unit->fcp_lun, + unit->port->wwpn, + queue_designator->hla, + queue_designator->cssid); + else + zfcp_act_eval_err(adapter, + header->fsf_status_qual.word[2]); + zfcp_erp_unit_access_denied(unit, 60, req); atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED: - ZFCP_LOG_INFO("error: The adapter ran out of resources. " - "There is no handle (temporary port identifier) " - "available for unit 0x%016Lx on port 0x%016Lx " - "on adapter %s\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - zfcp_erp_unit_failed(unit, 34, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + dev_warn(&adapter->ccw_device->dev, + "The adapter ran out of resources. There is no " + "handle available for unit 0x%016Lx on port 0x%016Lx.", + unit->fcp_lun, unit->port->wwpn); + zfcp_erp_unit_failed(unit, 34, req); + /* fall through */ + case FSF_INVALID_COMMAND_OPTION: + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_ADAPTER_STATUS_AVAILABLE: switch (header->fsf_status_qual.word[0]) { case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: - /* Re-establish link to port */ zfcp_test_link(unit->port); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; + /* fall through */ case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - /* ERP strategy will escalate */ - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - default: - ZFCP_LOG_NORMAL - ("bug: Wrong status qualifier 0x%x arrived.\n", - header->fsf_status_qual.word[0]); } break; - case FSF_INVALID_COMMAND_OPTION: - ZFCP_LOG_NORMAL( - "Invalid option 0x%x has been specified " - "in QTCB bottom sent to the adapter %s\n", - bottom->option, - zfcp_get_busid_by_adapter(adapter)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EINVAL; - break; - case FSF_GOOD: - /* save LUN handle assigned by FSF */ unit->handle = header->lun_handle; - ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on " - "adapter %s opened, port handle 0x%x\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - unit->handle); - /* mark unit as open */ atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) && @@ -3168,1528 +1830,629 @@ zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req) if (!readwrite) { atomic_set_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); - ZFCP_LOG_NORMAL("read-only access for unit " - "(adapter %s, wwpn=0x%016Lx, " - "fcp_lun=0x%016Lx)\n", - zfcp_get_busid_by_unit(unit), - unit->port->wwpn, - unit->fcp_lun); + dev_info(&adapter->ccw_device->dev, + "Read-only access for unit 0x%016Lx " + "on port 0x%016Lx.\n", + unit->fcp_lun, unit->port->wwpn); } if (exclusive && !readwrite) { - ZFCP_LOG_NORMAL("exclusive access of read-only " - "unit not supported\n"); - zfcp_erp_unit_failed(unit, 35, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - zfcp_erp_unit_shutdown(unit, 0, 80, fsf_req); + dev_err(&adapter->ccw_device->dev, + "Exclusive access of read-only unit " + "0x%016Lx on port 0x%016Lx not " + "supported, disabling unit.\n", + unit->fcp_lun, unit->port->wwpn); + zfcp_erp_unit_failed(unit, 35, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_erp_unit_shutdown(unit, 0, 80, req); } else if (!exclusive && readwrite) { - ZFCP_LOG_NORMAL("shared access of read-write " - "unit not supported\n"); - zfcp_erp_unit_failed(unit, 36, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - zfcp_erp_unit_shutdown(unit, 0, 81, fsf_req); + dev_err(&adapter->ccw_device->dev, + "Shared access of read-write unit " + "0x%016Lx on port 0x%016Lx not " + "supported, disabling unit.\n", + unit->fcp_lun, unit->port->wwpn); + zfcp_erp_unit_failed(unit, 36, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_erp_unit_shutdown(unit, 0, 81, req); } } - - retval = 0; - break; - - default: - ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " - "(debug info 0x%x)\n", - header->fsf_status); break; } - skip_fsfstatus: +skip_fsfstatus: atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status); - return retval; } -/* - * function: zfcp_fsf_close_unit - * - * purpose: - * - * returns: address of fsf_req - request successfully initiated - * NULL - - * - * assumptions: This routine does not check whether the associated - * remote port/lun has already been opened. This should be - * done by calling routines. Otherwise some status - * may be presented by FSF +/** + * zfcp_fsf_open_unit - open unit + * @erp_action: pointer to struct zfcp_erp_action + * Returns: 0 on success, error otherwise */ -int -zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) +int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) { volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; - unsigned long lock_flags; - int retval = 0; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(erp_action->adapter, - FSF_QTCB_CLOSE_LUN, - ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, - erp_action->adapter->pool.fsf_req_erp, - &lock_flags, &fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("error: Could not create close unit request for " - "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n", - erp_action->unit->fcp_lun, - erp_action->port->wwpn, - zfcp_get_busid_by_adapter(erp_action->adapter)); + struct zfcp_adapter *adapter = erp_action->adapter; + struct zfcp_fsf_req *req; + int retval = -EIO; + + spin_lock(&adapter->req_q.lock); + if (zfcp_fsf_req_sbal_get(adapter)) + goto out; + + req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN, + ZFCP_REQ_AUTO_CLEANUP, + adapter->pool.fsf_req_erp); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + sbale = zfcp_qdio_sbale_req(req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - fsf_req->qtcb->header.port_handle = erp_action->port->handle; - fsf_req->qtcb->header.lun_handle = erp_action->unit->handle; - atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status); - fsf_req->data = (unsigned long) erp_action->unit; - fsf_req->erp_action = erp_action; - erp_action->fsf_req = fsf_req; + req->qtcb->header.port_handle = erp_action->port->handle; + req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun; + req->handler = zfcp_fsf_open_unit_handler; + req->data = erp_action->unit; + req->erp_action = erp_action; + erp_action->fsf_req = req; - zfcp_erp_start_timer(fsf_req); - retval = zfcp_fsf_req_send(erp_action->fsf_req); + if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE)) + req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING; + + atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status); + + zfcp_fsf_start_erp_timer(req); + retval = zfcp_fsf_req_send(req); if (retval) { - ZFCP_LOG_INFO("error: Could not send a close unit request for " - "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n", - erp_action->unit->fcp_lun, - erp_action->port->wwpn, - zfcp_get_busid_by_adapter(erp_action->adapter)); - zfcp_fsf_req_free(fsf_req); + zfcp_fsf_req_free(req); erp_action->fsf_req = NULL; - goto out; } - - ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, " - "port 0x%016Lx, unit 0x%016Lx)\n", - zfcp_get_busid_by_adapter(erp_action->adapter), - erp_action->port->wwpn, erp_action->unit->fcp_lun); - out: - write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, - lock_flags); +out: + spin_unlock(&adapter->req_q.lock); return retval; } -/* - * function: zfcp_fsf_close_unit_handler - * - * purpose: is called for finished Close LUN FSF command - * - * returns: - */ -static int -zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req) { - int retval = -EINVAL; - struct zfcp_unit *unit; - - unit = (struct zfcp_unit *) fsf_req->data; + struct zfcp_unit *unit = req->data; - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { - /* don't change unit status in our bookkeeping */ + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) goto skip_fsfstatus; - } - - /* evaluate FSF status in QTCB */ - switch (fsf_req->qtcb->header.fsf_status) { + switch (req->qtcb->header.fsf_status) { case FSF_PORT_HANDLE_NOT_VALID: - ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " - "0x%016Lx on adapter %s invalid. This may " - "happen in rare circumstances\n", - unit->port->handle, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - ZFCP_LOG_DEBUG("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &fsf_req->qtcb->header.fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_LUN_HANDLE_NOT_VALID: - ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit " - "0x%016Lx on port 0x%016Lx on adapter %s is " - "invalid. This may happen occasionally.\n", - unit->handle, - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - ZFCP_LOG_DEBUG("Status qualifier data:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &fsf_req->qtcb->header.fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_port_reopen(unit->port, 0, 111, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_erp_port_reopen(unit->port, 0, 111, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_PORT_BOXED: - ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " - "needs to be reopened\n", - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - zfcp_erp_port_boxed(unit->port, 52, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | - ZFCP_STATUS_FSFREQ_RETRY; + zfcp_erp_port_boxed(unit->port, 52, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR | + ZFCP_STATUS_FSFREQ_RETRY; break; - case FSF_ADAPTER_STATUS_AVAILABLE: - switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) { + switch (req->qtcb->header.fsf_status_qual.word[0]) { case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: - /* re-establish link to port */ zfcp_test_link(unit->port); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; + /* fall through */ case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - /* ERP strategy will escalate */ - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - default: - ZFCP_LOG_NORMAL - ("bug: Wrong status qualifier 0x%x arrived.\n", - fsf_req->qtcb->header.fsf_status_qual.word[0]); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } break; - case FSF_GOOD: - ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s " - "closed, port handle 0x%x\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - unit->handle); - /* mark unit as closed */ atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); - retval = 0; - break; - - default: - ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " - "(debug info 0x%x)\n", - fsf_req->qtcb->header.fsf_status); break; } - - skip_fsfstatus: +skip_fsfstatus: atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status); - return retval; } /** - * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command) - * @adapter: adapter where scsi command is issued - * @unit: unit where command is sent to - * @scsi_cmnd: scsi command to be sent - * @timer: timer to be started when request is initiated - * @req_flags: flags for fsf_request + * zfcp_fsf_close_unit - close zfcp unit + * @erp_action: pointer to struct zfcp_unit + * Returns: 0 on success, error otherwise */ -int -zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter, - struct zfcp_unit *unit, - struct scsi_cmnd * scsi_cmnd, - int use_timer, int req_flags) +int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) { - struct zfcp_fsf_req *fsf_req = NULL; - struct fcp_cmnd_iu *fcp_cmnd_iu; - unsigned int sbtype; - unsigned long lock_flags; - int real_bytes = 0; - int retval = 0; - int mask; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, - adapter->pool.fsf_req_scsi, - &lock_flags, &fsf_req); - if (unlikely(retval < 0)) { - ZFCP_LOG_DEBUG("error: Could not create FCP command request " - "for unit 0x%016Lx on port 0x%016Lx on " - "adapter %s\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_adapter(adapter)); - goto failed_req_create; - } - - if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, - &unit->status))) { - retval = -EBUSY; - goto unit_blocked; - } - - zfcp_unit_get(unit); - fsf_req->unit = unit; - - /* associate FSF request with SCSI request (for look up on abort) */ - scsi_cmnd->host_scribble = (unsigned char *) fsf_req->req_id; - - /* associate SCSI command with FSF request */ - fsf_req->data = (unsigned long) scsi_cmnd; - - /* set handles of unit and its parent port in QTCB */ - fsf_req->qtcb->header.lun_handle = unit->handle; - fsf_req->qtcb->header.port_handle = unit->port->handle; - - /* FSF does not define the structure of the FCP_CMND IU */ - fcp_cmnd_iu = (struct fcp_cmnd_iu *) - &(fsf_req->qtcb->bottom.io.fcp_cmnd); - - /* - * set depending on data direction: - * data direction bits in SBALE (SB Type) - * data direction bits in QTCB - * data direction bits in FCP_CMND IU - */ - switch (scsi_cmnd->sc_data_direction) { - case DMA_NONE: - fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; - /* - * FIXME(qdio): - * what is the correct type for commands - * without 'real' data buffers? - */ - sbtype = SBAL_FLAGS0_TYPE_READ; - break; - case DMA_FROM_DEVICE: - fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ; - sbtype = SBAL_FLAGS0_TYPE_READ; - fcp_cmnd_iu->rddata = 1; - break; - case DMA_TO_DEVICE: - fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE; - sbtype = SBAL_FLAGS0_TYPE_WRITE; - fcp_cmnd_iu->wddata = 1; - break; - case DMA_BIDIRECTIONAL: - default: - /* - * dummy, catch this condition earlier - * in zfcp_scsi_queuecommand - */ - goto failed_scsi_cmnd; - } - - /* set FC service class in QTCB (3 per default) */ - fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT; - - /* set FCP_LUN in FCP_CMND IU in QTCB */ - fcp_cmnd_iu->fcp_lun = unit->fcp_lun; - - mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED; - - /* set task attributes in FCP_CMND IU in QTCB */ - if (likely((scsi_cmnd->device->simple_tags) || - (atomic_test_mask(mask, &unit->status)))) - fcp_cmnd_iu->task_attribute = SIMPLE_Q; - else - fcp_cmnd_iu->task_attribute = UNTAGGED; - - /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */ - if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) { - fcp_cmnd_iu->add_fcp_cdb_length - = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2; - ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, " - "additional FCP_CDB length is 0x%x " - "(shifted right 2 bits)\n", - scsi_cmnd->cmd_len, - fcp_cmnd_iu->add_fcp_cdb_length); - } - /* - * copy SCSI CDB (including additional length, if any) to - * FCP_CDB in FCP_CMND IU in QTCB - */ - memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); - - /* FCP CMND IU length in QTCB */ - fsf_req->qtcb->bottom.io.fcp_cmnd_length = - sizeof (struct fcp_cmnd_iu) + - fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t); + volatile struct qdio_buffer_element *sbale; + struct zfcp_adapter *adapter = erp_action->adapter; + struct zfcp_fsf_req *req; + int retval = -EIO; - /* generate SBALEs from data buffer */ - real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd); - if (unlikely(real_bytes < 0)) { - if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) { - ZFCP_LOG_DEBUG( - "Data did not fit into available buffer(s), " - "waiting for more...\n"); - retval = -EIO; - } else { - ZFCP_LOG_NORMAL("error: No truncation implemented but " - "required. Shutting down unit " - "(adapter %s, port 0x%016Lx, " - "unit 0x%016Lx)\n", - zfcp_get_busid_by_unit(unit), - unit->port->wwpn, - unit->fcp_lun); - zfcp_erp_unit_shutdown(unit, 0, 131, fsf_req); - retval = -EINVAL; - } - goto no_fit; + spin_lock(&adapter->req_q.lock); + if (zfcp_fsf_req_sbal_get(adapter)) + goto out; + req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN, + ZFCP_REQ_AUTO_CLEANUP, + adapter->pool.fsf_req_erp); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); + goto out; } - /* set length of FCP data length in FCP_CMND IU in QTCB */ - zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes); + sbale = zfcp_qdio_sbale_req(req); + sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; + sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - ZFCP_LOG_DEBUG("Sending SCSI command:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len); + req->qtcb->header.port_handle = erp_action->port->handle; + req->qtcb->header.lun_handle = erp_action->unit->handle; + req->handler = zfcp_fsf_close_unit_handler; + req->data = erp_action->unit; + req->erp_action = erp_action; + erp_action->fsf_req = req; + atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status); - if (use_timer) - zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); - - retval = zfcp_fsf_req_send(fsf_req); - if (unlikely(retval < 0)) { - ZFCP_LOG_INFO("error: Could not send FCP command request " - "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n", - zfcp_get_busid_by_adapter(adapter), - unit->port->wwpn, - unit->fcp_lun); - goto send_failed; + zfcp_fsf_start_erp_timer(req); + retval = zfcp_fsf_req_send(req); + if (retval) { + zfcp_fsf_req_free(req); + erp_action->fsf_req = NULL; } - - ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, " - "port 0x%016Lx, unit 0x%016Lx)\n", - zfcp_get_busid_by_adapter(adapter), - unit->port->wwpn, - unit->fcp_lun); - goto success; - - send_failed: - no_fit: - failed_scsi_cmnd: - zfcp_unit_put(unit); - unit_blocked: - zfcp_fsf_req_free(fsf_req); - fsf_req = NULL; - scsi_cmnd->host_scribble = NULL; - success: - failed_req_create: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); +out: + spin_unlock(&adapter->req_q.lock); return retval; } -struct zfcp_fsf_req * -zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter, - struct zfcp_unit *unit, - u8 tm_flags, int req_flags) +static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat) { - struct zfcp_fsf_req *fsf_req = NULL; - int retval = 0; - struct fcp_cmnd_iu *fcp_cmnd_iu; - unsigned long lock_flags; - volatile struct qdio_buffer_element *sbale; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, - adapter->pool.fsf_req_scsi, - &lock_flags, &fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("error: Could not create FCP command (task " - "management) request for adapter %s, port " - " 0x%016Lx, unit 0x%016Lx.\n", - zfcp_get_busid_by_adapter(adapter), - unit->port->wwpn, unit->fcp_lun); - goto out; - } - - if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, - &unit->status))) - goto unit_blocked; - - /* - * Used to decide on proper handler in the return path, - * could be either zfcp_fsf_send_fcp_command_task_handler or - * zfcp_fsf_send_fcp_command_task_management_handler */ - - fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT; - - /* - * hold a pointer to the unit being target of this - * task management request - */ - fsf_req->data = (unsigned long) unit; - - /* set FSF related fields in QTCB */ - fsf_req->qtcb->header.lun_handle = unit->handle; - fsf_req->qtcb->header.port_handle = unit->port->handle; - fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; - fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT; - fsf_req->qtcb->bottom.io.fcp_cmnd_length = - sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t); - - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); - sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - - /* set FCP related fields in FCP_CMND IU in QTCB */ - fcp_cmnd_iu = (struct fcp_cmnd_iu *) - &(fsf_req->qtcb->bottom.io.fcp_cmnd); - fcp_cmnd_iu->fcp_lun = unit->fcp_lun; - fcp_cmnd_iu->task_management_flags = tm_flags; - - zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT); - retval = zfcp_fsf_req_send(fsf_req); - if (!retval) - goto out; - - unit_blocked: - zfcp_fsf_req_free(fsf_req); - fsf_req = NULL; - - out: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); - return fsf_req; + lat_rec->sum += lat; + lat_rec->min = min(lat_rec->min, lat); + lat_rec->max = max(lat_rec->max, lat); } -/* - * function: zfcp_fsf_send_fcp_command_handler - * - * purpose: is called for finished Send FCP Command - * - * returns: - */ -static int -zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req) { - int retval = -EINVAL; - struct zfcp_unit *unit; - struct fsf_qtcb_header *header; - u16 subtable, rule, counter; - - header = &fsf_req->qtcb->header; - - if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)) - unit = (struct zfcp_unit *) fsf_req->data; - else - unit = fsf_req->unit; - - if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { - /* go directly to calls of special handlers */ - goto skip_fsfstatus; - } - - /* evaluate FSF status in QTCB */ - switch (header->fsf_status) { - - case FSF_PORT_HANDLE_NOT_VALID: - ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " - "0x%016Lx on adapter %s invalid\n", - unit->port->handle, - unit->port->wwpn, zfcp_get_busid_by_unit(unit)); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &header->fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - case FSF_LUN_HANDLE_NOT_VALID: - ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit " - "0x%016Lx on port 0x%016Lx on adapter %s is " - "invalid. This may happen occasionally.\n", - unit->handle, - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - ZFCP_LOG_NORMAL("Status qualifier data:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, - (char *) &header->fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_port_reopen(unit->port, 0, 113, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - case FSF_HANDLE_MISMATCH: - ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed " - "unexpectedly. (adapter %s, port 0x%016Lx, " - "unit 0x%016Lx)\n", - unit->port->handle, - zfcp_get_busid_by_unit(unit), - unit->port->wwpn, - unit->fcp_lun); - ZFCP_LOG_NORMAL("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, - (char *) &header->fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_adapter_reopen(unit->port->adapter, 0, 114, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - case FSF_SERVICE_CLASS_NOT_SUPPORTED: - ZFCP_LOG_INFO("error: adapter %s does not support fc " - "class %d.\n", - zfcp_get_busid_by_unit(unit), - ZFCP_FC_SERVICE_CLASS_DEFAULT); - /* stop operation for this adapter */ - zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 132, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - case FSF_FCPLUN_NOT_VALID: - ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on " - "adapter %s does not have correct unit " - "handle 0x%x\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - unit->handle); - ZFCP_LOG_DEBUG("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &header->fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_port_reopen(unit->port, 0, 115, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - case FSF_ACCESS_DENIED: - ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to " - "unit 0x%016Lx on port 0x%016Lx on " - "adapter %s\n", unit->fcp_lun, unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - for (counter = 0; counter < 2; counter++) { - subtable = header->fsf_status_qual.halfword[counter * 2]; - rule = header->fsf_status_qual.halfword[counter * 2 + 1]; - switch (subtable) { - case FSF_SQ_CFDC_SUBTABLE_OS: - case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: - case FSF_SQ_CFDC_SUBTABLE_PORT_DID: - case FSF_SQ_CFDC_SUBTABLE_LUN: - ZFCP_LOG_INFO("Access denied (%s rule %d)\n", - zfcp_act_subtable_type[subtable], rule); - break; - } - } - zfcp_erp_unit_access_denied(unit, 61, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - case FSF_DIRECTION_INDICATOR_NOT_VALID: - ZFCP_LOG_INFO("bug: Invalid data direction given for unit " - "0x%016Lx on port 0x%016Lx on adapter %s " - "(debug info %d)\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - fsf_req->qtcb->bottom.io.data_direction); - /* stop operation for this adapter */ - zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - case FSF_CMND_LENGTH_NOT_VALID: - ZFCP_LOG_NORMAL - ("bug: An invalid control-data-block length field " - "was found in a command for unit 0x%016Lx on port " - "0x%016Lx on adapter %s " "(debug info %d)\n", - unit->fcp_lun, unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - fsf_req->qtcb->bottom.io.fcp_cmnd_length); - /* stop operation for this adapter */ - zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; + struct fsf_qual_latency_info *lat_inf; + struct latency_cont *lat; + struct zfcp_unit *unit = req->unit; + unsigned long flags; - case FSF_PORT_BOXED: - ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " - "needs to be reopened\n", - unit->port->wwpn, zfcp_get_busid_by_unit(unit)); - zfcp_erp_port_boxed(unit->port, 53, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | - ZFCP_STATUS_FSFREQ_RETRY; - break; + lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info; - case FSF_LUN_BOXED: - ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, " - "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n", - zfcp_get_busid_by_unit(unit), - unit->port->wwpn, unit->fcp_lun); - zfcp_erp_unit_boxed(unit, 54, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR - | ZFCP_STATUS_FSFREQ_RETRY; - break; - - case FSF_ADAPTER_STATUS_AVAILABLE: - switch (header->fsf_status_qual.word[0]) { - case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: - /* re-establish link to port */ - zfcp_test_link(unit->port); - break; - case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - /* FIXME(hw) need proper specs for proper action */ - /* let scsi stack deal with retries and escalation */ - break; - default: - ZFCP_LOG_NORMAL - ("Unknown status qualifier 0x%x arrived.\n", - header->fsf_status_qual.word[0]); - break; - } - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + switch (req->qtcb->bottom.io.data_direction) { + case FSF_DATADIR_READ: + lat = &unit->latencies.read; break; - - case FSF_GOOD: + case FSF_DATADIR_WRITE: + lat = &unit->latencies.write; break; - - case FSF_FCP_RSP_AVAILABLE: + case FSF_DATADIR_CMND: + lat = &unit->latencies.cmd; break; + default: + return; } - skip_fsfstatus: - if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) { - retval = - zfcp_fsf_send_fcp_command_task_management_handler(fsf_req); - } else { - retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req); - fsf_req->unit = NULL; - zfcp_unit_put(unit); - } - return retval; + spin_lock_irqsave(&unit->latencies.lock, flags); + zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat); + zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat); + lat->counter++; + spin_unlock_irqrestore(&unit->latencies.lock, flags); } -/* - * function: zfcp_fsf_send_fcp_command_task_handler - * - * purpose: evaluates FCP_RSP IU - * - * returns: - */ -static int -zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req) { - int retval = 0; - struct scsi_cmnd *scpnt; + struct scsi_cmnd *scpnt = req->data; struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) - &(fsf_req->qtcb->bottom.io.fcp_rsp); - struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *) - &(fsf_req->qtcb->bottom.io.fcp_cmnd); + &(req->qtcb->bottom.io.fcp_rsp); u32 sns_len; - char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu); + char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1]; unsigned long flags; - struct zfcp_unit *unit = fsf_req->unit; - - read_lock_irqsave(&fsf_req->adapter->abort_lock, flags); - scpnt = (struct scsi_cmnd *) fsf_req->data; - if (unlikely(!scpnt)) { - ZFCP_LOG_DEBUG - ("Command with fsf_req %p is not associated to " - "a scsi command anymore. Aborted?\n", fsf_req); - goto out; - } - if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) { - /* FIXME: (design) mid-layer should handle DID_ABORT like - * DID_SOFT_ERROR by retrying the request for devices - * that allow retries. - */ - ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n"); - set_host_byte(&scpnt->result, DID_SOFT_ERROR); - set_driver_byte(&scpnt->result, SUGGEST_RETRY); + + if (unlikely(!scpnt)) + return; + + read_lock_irqsave(&req->adapter->abort_lock, flags); + + if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) { + set_host_byte(scpnt, DID_SOFT_ERROR); + set_driver_byte(scpnt, SUGGEST_RETRY); goto skip_fsfstatus; } - if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { - ZFCP_LOG_DEBUG("Setting DID_ERROR\n"); - set_host_byte(&scpnt->result, DID_ERROR); + if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) { + set_host_byte(scpnt, DID_ERROR); goto skip_fsfstatus; } - /* set message byte of result in SCSI command */ - scpnt->result |= COMMAND_COMPLETE << 8; + set_msg_byte(scpnt, COMMAND_COMPLETE); - /* - * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte - * of result in SCSI command - */ scpnt->result |= fcp_rsp_iu->scsi_status; - if (unlikely(fcp_rsp_iu->scsi_status)) { - /* DEBUG */ - ZFCP_LOG_DEBUG("status for SCSI Command:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - scpnt->cmnd, scpnt->cmd_len); - ZFCP_LOG_DEBUG("SCSI status code 0x%x\n", - fcp_rsp_iu->scsi_status); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu)); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), - fcp_rsp_iu->fcp_sns_len); - } - /* check FCP_RSP_INFO */ + if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) + zfcp_fsf_req_latency(req); + if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) { - ZFCP_LOG_DEBUG("rsp_len is valid\n"); - switch (fcp_rsp_info[3]) { - case RSP_CODE_GOOD: - /* ok, continue */ - ZFCP_LOG_TRACE("no failure or Task Management " - "Function complete\n"); - set_host_byte(&scpnt->result, DID_OK); - break; - case RSP_CODE_LENGTH_MISMATCH: - /* hardware bug */ - ZFCP_LOG_NORMAL("bug: FCP response code indictates " - "that the fibrechannel protocol data " - "length differs from the burst length. " - "The problem occured on unit 0x%016Lx " - "on port 0x%016Lx on adapter %s", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - /* dump SCSI CDB as prepared by zfcp */ - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &fsf_req->qtcb-> - bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); - set_host_byte(&scpnt->result, DID_ERROR); - goto skip_fsfstatus; - case RSP_CODE_FIELD_INVALID: - /* driver or hardware bug */ - ZFCP_LOG_NORMAL("bug: FCP response code indictates " - "that the fibrechannel protocol data " - "fields were incorrectly set up. " - "The problem occured on the unit " - "0x%016Lx on port 0x%016Lx on " - "adapter %s", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - /* dump SCSI CDB as prepared by zfcp */ - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &fsf_req->qtcb-> - bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); - set_host_byte(&scpnt->result, DID_ERROR); - goto skip_fsfstatus; - case RSP_CODE_RO_MISMATCH: - /* hardware bug */ - ZFCP_LOG_NORMAL("bug: The FCP response code indicates " - "that conflicting values for the " - "fibrechannel payload offset from the " - "header were found. " - "The problem occured on unit 0x%016Lx " - "on port 0x%016Lx on adapter %s.\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - /* dump SCSI CDB as prepared by zfcp */ - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &fsf_req->qtcb-> - bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); - set_host_byte(&scpnt->result, DID_ERROR); - goto skip_fsfstatus; - default: - ZFCP_LOG_NORMAL("bug: An invalid FCP response " - "code was detected for a command. " - "The problem occured on the unit " - "0x%016Lx on port 0x%016Lx on " - "adapter %s (debug info 0x%x)\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - fcp_rsp_info[3]); - /* dump SCSI CDB as prepared by zfcp */ - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &fsf_req->qtcb-> - bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); - set_host_byte(&scpnt->result, DID_ERROR); + if (fcp_rsp_info[3] == RSP_CODE_GOOD) + set_host_byte(scpnt, DID_OK); + else { + set_host_byte(scpnt, DID_ERROR); goto skip_fsfstatus; } } - /* check for sense data */ if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) { - sns_len = FSF_FCP_RSP_SIZE - - sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len; - ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n", - sns_len); + sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) + + fcp_rsp_iu->fcp_rsp_len; sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE); - ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n", - SCSI_SENSE_BUFFERSIZE); sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len); - ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n", - scpnt->result); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, - scpnt->cmnd, scpnt->cmd_len); - ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n", - fcp_rsp_iu->fcp_sns_len); memcpy(scpnt->sense_buffer, zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, - (void *)scpnt->sense_buffer, sns_len); - } - - /* check for overrun */ - if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) { - ZFCP_LOG_INFO("A data overrun was detected for a command. " - "unit 0x%016Lx, port 0x%016Lx, adapter %s. " - "The response data length is " - "%d, the original length was %d.\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - fcp_rsp_iu->fcp_resid, - (int) zfcp_get_fcp_dl(fcp_cmnd_iu)); } - /* check for underrun */ if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) { - ZFCP_LOG_INFO("A data underrun was detected for a command. " - "unit 0x%016Lx, port 0x%016Lx, adapter %s. " - "The response data length is " - "%d, the original length was %d.\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - fcp_rsp_iu->fcp_resid, - (int) zfcp_get_fcp_dl(fcp_cmnd_iu)); - scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid); if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) < scpnt->underflow) - set_host_byte(&scpnt->result, DID_ERROR); + set_host_byte(scpnt, DID_ERROR); } - - skip_fsfstatus: - ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result); - +skip_fsfstatus: if (scpnt->result != 0) - zfcp_scsi_dbf_event_result("erro", 3, fsf_req->adapter, scpnt, fsf_req); + zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req); else if (scpnt->retries > 0) - zfcp_scsi_dbf_event_result("retr", 4, fsf_req->adapter, scpnt, fsf_req); + zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req); else - zfcp_scsi_dbf_event_result("norm", 6, fsf_req->adapter, scpnt, fsf_req); + zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req); - /* cleanup pointer (need this especially for abort) */ scpnt->host_scribble = NULL; - - /* always call back */ (scpnt->scsi_done) (scpnt); - /* * We must hold this lock until scsi_done has been called. * Otherwise we may call scsi_done after abort regarding this * command has completed. * Note: scsi_done must not block! */ - out: - read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags); - return retval; + read_unlock_irqrestore(&req->adapter->abort_lock, flags); } -/* - * function: zfcp_fsf_send_fcp_command_task_management_handler - * - * purpose: evaluates FCP_RSP IU - * - * returns: - */ -static int -zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req) { - int retval = 0; struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) - &(fsf_req->qtcb->bottom.io.fcp_rsp); - char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu); - struct zfcp_unit *unit = (struct zfcp_unit *) fsf_req->data; - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { - fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; - goto skip_fsfstatus; - } + &(req->qtcb->bottom.io.fcp_rsp); + char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1]; - /* check FCP_RSP_INFO */ - switch (fcp_rsp_info[3]) { - case RSP_CODE_GOOD: - /* ok, continue */ - ZFCP_LOG_DEBUG("no failure or Task Management " - "Function complete\n"); - break; - case RSP_CODE_TASKMAN_UNSUPP: - ZFCP_LOG_NORMAL("bug: A reuested task management function " - "is not supported on the target device " - "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP; - break; - case RSP_CODE_TASKMAN_FAILED: - ZFCP_LOG_NORMAL("bug: A reuested task management function " - "failed to complete successfully. " - "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; - break; - default: - ZFCP_LOG_NORMAL("bug: An invalid FCP response " - "code was detected for a command. " - "unit 0x%016Lx, port 0x%016Lx, adapter %s " - "(debug info 0x%x)\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - fcp_rsp_info[3]); - fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; - } - - skip_fsfstatus: - return retval; + if ((fcp_rsp_info[3] != RSP_CODE_GOOD) || + (req->status & ZFCP_STATUS_FSFREQ_ERROR)) + req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; } -/* - * function: zfcp_fsf_control_file - * - * purpose: Initiator of the control file upload/download FSF requests - * - * returns: 0 - FSF request is successfuly created and queued - * -EOPNOTSUPP - The FCP adapter does not have Control File support - * -EINVAL - Invalid direction specified - * -ENOMEM - Insufficient memory - * -EPERM - Cannot create FSF request or place it in QDIO queue - */ -int -zfcp_fsf_control_file(struct zfcp_adapter *adapter, - struct zfcp_fsf_req **fsf_req_ptr, - u32 fsf_command, - u32 option, - struct zfcp_sg_list *sg_list) +static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req) { - struct zfcp_fsf_req *fsf_req; - struct fsf_qtcb_bottom_support *bottom; - volatile struct qdio_buffer_element *sbale; - unsigned long lock_flags; - int req_flags = 0; - int direction; - int retval = 0; - - if (!(adapter->adapter_features & FSF_FEATURE_CFDC)) { - ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n", - zfcp_get_busid_by_adapter(adapter)); - retval = -EOPNOTSUPP; - goto out; - } - - switch (fsf_command) { - - case FSF_QTCB_DOWNLOAD_CONTROL_FILE: - direction = SBAL_FLAGS0_TYPE_WRITE; - if ((option != FSF_CFDC_OPTION_FULL_ACCESS) && - (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS)) - req_flags = ZFCP_WAIT_FOR_SBAL; - break; - - case FSF_QTCB_UPLOAD_CONTROL_FILE: - direction = SBAL_FLAGS0_TYPE_READ; - break; - - default: - ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command); - retval = -EINVAL; - goto out; - } - - retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags, - NULL, &lock_flags, &fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("error: Could not create FSF request for the " - "adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - retval = -EPERM; - goto unlock_queue_lock; - } - - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); - sbale[0].flags |= direction; - - bottom = &fsf_req->qtcb->bottom.support; - bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE; - bottom->option = option; - - if (sg_list->count > 0) { - int bytes; - - bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction, - sg_list->sg, sg_list->count, - ZFCP_MAX_SBALS_PER_REQ); - if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) { - ZFCP_LOG_INFO( - "error: Could not create sufficient number of " - "SBALS for an FSF request to the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - retval = -ENOMEM; - goto free_fsf_req; - } - } else - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - - zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); - retval = zfcp_fsf_req_send(fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("initiation of cfdc up/download failed" - "(adapter %s)\n", - zfcp_get_busid_by_adapter(adapter)); - retval = -EPERM; - goto free_fsf_req; - } - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); - - ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the " - "adapter %s\n", - fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ? - "download" : "upload", - zfcp_get_busid_by_adapter(adapter)); - - wait_event(fsf_req->completion_wq, - fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); - - *fsf_req_ptr = fsf_req; - goto out; - - free_fsf_req: - zfcp_fsf_req_free(fsf_req); - unlock_queue_lock: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); - out: - return retval; -} - + struct zfcp_unit *unit; + struct fsf_qtcb_header *header = &req->qtcb->header; -/* - * function: zfcp_fsf_control_file_handler - * - * purpose: Handler of the control file upload/download FSF requests - * - * returns: 0 - FSF request successfuly processed - * -EAGAIN - Operation has to be repeated because of a temporary problem - * -EACCES - There is no permission to execute an operation - * -EPERM - The control file is not in a right format - * -EIO - There is a problem with the FCP adapter - * -EINVAL - Invalid operation - * -EFAULT - User space memory I/O operation fault - */ -static int -zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req) -{ - struct zfcp_adapter *adapter = fsf_req->adapter; - struct fsf_qtcb_header *header = &fsf_req->qtcb->header; - struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support; - int retval = 0; + if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)) + unit = req->data; + else + unit = req->unit; - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { - retval = -EINVAL; + if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) goto skip_fsfstatus; - } switch (header->fsf_status) { - - case FSF_GOOD: - ZFCP_LOG_NORMAL( - "The FSF request has been successfully completed " - "on the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - break; - - case FSF_OPERATION_PARTIALLY_SUCCESSFUL: - if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) { - switch (header->fsf_status_qual.word[0]) { - - case FSF_SQ_CFDC_HARDENED_ON_SE: - ZFCP_LOG_NORMAL( - "CFDC on the adapter %s has being " - "hardened on primary and secondary SE\n", - zfcp_get_busid_by_adapter(adapter)); - break; - - case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE: - ZFCP_LOG_NORMAL( - "CFDC of the adapter %s could not " - "be saved on the SE\n", - zfcp_get_busid_by_adapter(adapter)); - break; - - case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2: - ZFCP_LOG_NORMAL( - "CFDC of the adapter %s could not " - "be copied to the secondary SE\n", - zfcp_get_busid_by_adapter(adapter)); - break; - - default: - ZFCP_LOG_NORMAL( - "CFDC could not be hardened " - "on the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - } - } - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EAGAIN; - break; - - case FSF_AUTHORIZATION_FAILURE: - ZFCP_LOG_NORMAL( - "Adapter %s does not accept privileged commands\n", - zfcp_get_busid_by_adapter(adapter)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EACCES; + case FSF_HANDLE_MISMATCH: + case FSF_PORT_HANDLE_NOT_VALID: + zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - - case FSF_CFDC_ERROR_DETECTED: - ZFCP_LOG_NORMAL( - "Error at position %d in the CFDC, " - "CFDC is discarded by the adapter %s\n", - header->fsf_status_qual.word[0], - zfcp_get_busid_by_adapter(adapter)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EPERM; + case FSF_FCPLUN_NOT_VALID: + case FSF_LUN_HANDLE_NOT_VALID: + zfcp_erp_port_reopen(unit->port, 0, 113, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - - case FSF_CONTROL_FILE_UPDATE_ERROR: - ZFCP_LOG_NORMAL( - "Adapter %s cannot harden the control file, " - "file is discarded\n", - zfcp_get_busid_by_adapter(adapter)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EIO; + case FSF_SERVICE_CLASS_NOT_SUPPORTED: + zfcp_fsf_class_not_supp(req); break; - - case FSF_CONTROL_FILE_TOO_LARGE: - ZFCP_LOG_NORMAL( - "Control file is too large, file is discarded " - "by the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EIO; + case FSF_ACCESS_DENIED: + zfcp_fsf_access_denied_unit(req, unit); break; - - case FSF_ACCESS_CONFLICT_DETECTED: - if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) - ZFCP_LOG_NORMAL( - "CFDC has been discarded by the adapter %s, " - "because activation would impact " - "%d active connection(s)\n", - zfcp_get_busid_by_adapter(adapter), - header->fsf_status_qual.word[0]); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EIO; + case FSF_DIRECTION_INDICATOR_NOT_VALID: + dev_err(&req->adapter->ccw_device->dev, + "Invalid data direction (%d) given for unit " + "0x%016Lx on port 0x%016Lx, shutting down " + "adapter.\n", + req->qtcb->bottom.io.data_direction, + unit->fcp_lun, unit->port->wwpn); + zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - - case FSF_CONFLICTS_OVERRULED: - if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) - ZFCP_LOG_NORMAL( - "CFDC has been activated on the adapter %s, " - "but activation has impacted " - "%d active connection(s)\n", - zfcp_get_busid_by_adapter(adapter), - header->fsf_status_qual.word[0]); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EIO; + case FSF_CMND_LENGTH_NOT_VALID: + dev_err(&req->adapter->ccw_device->dev, + "An invalid control-data-block length field (%d) " + "was found in a command for unit 0x%016Lx on port " + "0x%016Lx. Shutting down adapter.\n", + req->qtcb->bottom.io.fcp_cmnd_length, + unit->fcp_lun, unit->port->wwpn); + zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - - case FSF_UNKNOWN_OP_SUBTYPE: - ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, " - "op_subtype=0x%x)\n", - zfcp_get_busid_by_adapter(adapter), - bottom->operation_subtype); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EINVAL; + case FSF_PORT_BOXED: + zfcp_erp_port_boxed(unit->port, 53, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR | + ZFCP_STATUS_FSFREQ_RETRY; break; - - case FSF_INVALID_COMMAND_OPTION: - ZFCP_LOG_NORMAL( - "Invalid option 0x%x has been specified " - "in QTCB bottom sent to the adapter %s\n", - bottom->option, - zfcp_get_busid_by_adapter(adapter)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EINVAL; + case FSF_LUN_BOXED: + zfcp_erp_unit_boxed(unit, 54, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR | + ZFCP_STATUS_FSFREQ_RETRY; break; - - default: - ZFCP_LOG_NORMAL( - "bug: An unknown/unexpected FSF status 0x%08x " - "was presented on the adapter %s\n", - header->fsf_status, - zfcp_get_busid_by_adapter(adapter)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EINVAL; + case FSF_ADAPTER_STATUS_AVAILABLE: + if (header->fsf_status_qual.word[0] == + FSF_SQ_INVOKE_LINK_TEST_PROCEDURE) + zfcp_test_link(unit->port); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } - skip_fsfstatus: - return retval; -} - -static inline int -zfcp_fsf_req_sbal_check(unsigned long *flags, - struct zfcp_qdio_queue *queue, int needed) -{ - write_lock_irqsave(&queue->queue_lock, *flags); - if (likely(atomic_read(&queue->free_count) >= needed)) - return 1; - write_unlock_irqrestore(&queue->queue_lock, *flags); - return 0; -} - -/* - * set qtcb pointer in fsf_req and initialize QTCB - */ -static void -zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req) -{ - if (likely(fsf_req->qtcb != NULL)) { - fsf_req->qtcb->prefix.req_seq_no = - fsf_req->adapter->fsf_req_seq_no; - fsf_req->qtcb->prefix.req_id = fsf_req->req_id; - fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION; - fsf_req->qtcb->prefix.qtcb_type = - fsf_qtcb_type[fsf_req->fsf_command]; - fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION; - fsf_req->qtcb->header.req_handle = fsf_req->req_id; - fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command; + if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) + zfcp_fsf_send_fcp_ctm_handler(req); + else { + zfcp_fsf_send_fcp_command_task_handler(req); + req->unit = NULL; + zfcp_unit_put(unit); } } /** - * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue - * @adapter: adapter for which request queue is examined - * @req_flags: flags indicating whether to wait for needed SBAL or not - * @lock_flags: lock_flags if queue_lock is taken - * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS - * Locks: lock adapter->request_queue->queue_lock on success - */ -static int -zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags, - unsigned long *lock_flags) -{ - long ret; - struct zfcp_qdio_queue *req_queue = &adapter->request_queue; - - if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) { - ret = wait_event_interruptible_timeout(adapter->request_wq, - zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1), - ZFCP_SBAL_TIMEOUT); - if (ret < 0) - return ret; - if (!ret) - return -EIO; - } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1)) - return -EIO; - - return 0; -} - -/* - * function: zfcp_fsf_req_create - * - * purpose: create an FSF request at the specified adapter and - * setup common fields - * - * returns: -ENOMEM if there was insufficient memory for a request - * -EIO if no qdio buffers could be allocate to the request - * -EINVAL/-EPERM on bug conditions in req_dequeue - * 0 in success - * - * note: The created request is returned by reference. - * - * locks: lock of concerned request queue must not be held, - * but is held on completion (write, irqsave) + * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command) + * @adapter: adapter where scsi command is issued + * @unit: unit where command is sent to + * @scsi_cmnd: scsi command to be sent + * @timer: timer to be started when request is initiated + * @req_flags: flags for fsf_request */ -int -zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags, - mempool_t *pool, unsigned long *lock_flags, - struct zfcp_fsf_req **fsf_req_p) +int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter, + struct zfcp_unit *unit, + struct scsi_cmnd *scsi_cmnd, + int use_timer, int req_flags) { - volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req = NULL; - int ret = 0; - struct zfcp_qdio_queue *req_queue = &adapter->request_queue; - - /* allocate new FSF request */ - fsf_req = zfcp_fsf_req_alloc(pool, req_flags); - if (unlikely(NULL == fsf_req)) { - ZFCP_LOG_DEBUG("error: Could not put an FSF request into " - "the outbound (send) queue.\n"); - ret = -ENOMEM; - goto failed_fsf_req; - } - - fsf_req->adapter = adapter; - fsf_req->fsf_command = fsf_cmd; - INIT_LIST_HEAD(&fsf_req->list); - init_timer(&fsf_req->timer); + struct zfcp_fsf_req *req; + struct fcp_cmnd_iu *fcp_cmnd_iu; + unsigned int sbtype; + int real_bytes, retval = -EIO; - /* initialize waitqueue which may be used to wait on - this request completion */ - init_waitqueue_head(&fsf_req->completion_wq); + if (unlikely(!(atomic_read(&unit->status) & + ZFCP_STATUS_COMMON_UNBLOCKED))) + return -EBUSY; - ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags); - if (ret < 0) - goto failed_sbals; + spin_lock(&adapter->req_q.lock); + if (!atomic_read(&adapter->req_q.count)) + goto out; + req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, + adapter->pool.fsf_req_scsi); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); + goto out; + } - /* this is serialized (we are holding req_queue-lock of adapter) */ - if (adapter->req_no == 0) - adapter->req_no++; - fsf_req->req_id = adapter->req_no++; + zfcp_unit_get(unit); + req->unit = unit; + req->data = scsi_cmnd; + req->handler = zfcp_fsf_send_fcp_command_handler; + req->qtcb->header.lun_handle = unit->handle; + req->qtcb->header.port_handle = unit->port->handle; + req->qtcb->bottom.io.service_class = FSF_CLASS_3; - zfcp_fsf_req_qtcb_init(fsf_req); + scsi_cmnd->host_scribble = (unsigned char *) req->req_id; + fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd); + fcp_cmnd_iu->fcp_lun = unit->fcp_lun; /* - * We hold queue_lock here. Check if QDIOUP is set and let request fail - * if it is not set (see also *_open_qdio and *_close_qdio). + * set depending on data direction: + * data direction bits in SBALE (SB Type) + * data direction bits in QTCB + * data direction bits in FCP_CMND IU */ - - if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { - write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags); - ret = -EIO; - goto failed_sbals; + switch (scsi_cmnd->sc_data_direction) { + case DMA_NONE: + req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; + sbtype = SBAL_FLAGS0_TYPE_READ; + break; + case DMA_FROM_DEVICE: + req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ; + sbtype = SBAL_FLAGS0_TYPE_READ; + fcp_cmnd_iu->rddata = 1; + break; + case DMA_TO_DEVICE: + req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE; + sbtype = SBAL_FLAGS0_TYPE_WRITE; + fcp_cmnd_iu->wddata = 1; + break; + case DMA_BIDIRECTIONAL: + default: + retval = -EIO; + goto failed_scsi_cmnd; } - if (fsf_req->qtcb) { - fsf_req->seq_no = adapter->fsf_req_seq_no; - fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no; - } - fsf_req->sbal_number = 1; - fsf_req->sbal_first = req_queue->free_index; - fsf_req->sbal_curr = req_queue->free_index; - fsf_req->sbale_curr = 1; + if (likely((scsi_cmnd->device->simple_tags) || + ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) && + (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED)))) + fcp_cmnd_iu->task_attribute = SIMPLE_Q; + else + fcp_cmnd_iu->task_attribute = UNTAGGED; - if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) { - fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; - } + if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) + fcp_cmnd_iu->add_fcp_cdb_length = + (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2; - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); - /* setup common SBALE fields */ - sbale[0].addr = (void *) fsf_req->req_id; - sbale[0].flags |= SBAL_FLAGS0_COMMAND; - if (likely(fsf_req->qtcb != NULL)) { - sbale[1].addr = (void *) fsf_req->qtcb; - sbale[1].length = sizeof(struct fsf_qtcb); + req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) + + fcp_cmnd_iu->add_fcp_cdb_length + sizeof(fcp_dl_t); + + real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype, + scsi_sglist(scsi_cmnd), + FSF_MAX_SBALS_PER_REQ); + if (unlikely(real_bytes < 0)) { + if (req->sbal_number < FSF_MAX_SBALS_PER_REQ) + retval = -EIO; + else { + dev_err(&adapter->ccw_device->dev, + "SCSI request too large. " + "Shutting down unit 0x%016Lx on port " + "0x%016Lx.\n", unit->fcp_lun, + unit->port->wwpn); + zfcp_erp_unit_shutdown(unit, 0, 131, req); + retval = -EINVAL; + } + goto failed_scsi_cmnd; } - ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n", - fsf_req->sbal_number, fsf_req->sbal_first); + zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes); - goto success; + if (use_timer) + zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); - failed_sbals: -/* dequeue new FSF request previously enqueued */ - zfcp_fsf_req_free(fsf_req); - fsf_req = NULL; + retval = zfcp_fsf_req_send(req); + if (unlikely(retval)) + goto failed_scsi_cmnd; - failed_fsf_req: - write_lock_irqsave(&req_queue->queue_lock, *lock_flags); - success: - *fsf_req_p = fsf_req; - return ret; + goto out; + +failed_scsi_cmnd: + zfcp_unit_put(unit); + zfcp_fsf_req_free(req); + scsi_cmnd->host_scribble = NULL; +out: + spin_unlock(&adapter->req_q.lock); + return retval; } -/* - * function: zfcp_fsf_req_send - * - * purpose: start transfer of FSF request via QDIO - * - * returns: 0 - request transfer succesfully started - * !0 - start of request transfer failed +/** + * zfcp_fsf_send_fcp_ctm - send SCSI task management command + * @adapter: pointer to struct zfcp-adapter + * @unit: pointer to struct zfcp_unit + * @tm_flags: unsigned byte for task management flags + * @req_flags: int request flags + * Returns: on success pointer to struct fsf_req, NULL otherwise */ -static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req) +struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter, + struct zfcp_unit *unit, + u8 tm_flags, int req_flags) { - struct zfcp_adapter *adapter; - struct zfcp_qdio_queue *req_queue; volatile struct qdio_buffer_element *sbale; - int inc_seq_no; - int new_distance_from_int; - int retval = 0; + struct zfcp_fsf_req *req = NULL; + struct fcp_cmnd_iu *fcp_cmnd_iu; - adapter = fsf_req->adapter; - req_queue = &adapter->request_queue, + if (unlikely(!(atomic_read(&unit->status) & + ZFCP_STATUS_COMMON_UNBLOCKED))) + return NULL; + spin_lock(&adapter->req_q.lock); + if (!atomic_read(&adapter->req_q.count)) + goto out; + req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, + adapter->pool.fsf_req_scsi); + if (unlikely(IS_ERR(req))) + goto out; - /* FIXME(debug): remove it later */ - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0); - ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags); - ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr, - sbale[1].length); + req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT; + req->data = unit; + req->handler = zfcp_fsf_send_fcp_command_handler; + req->qtcb->header.lun_handle = unit->handle; + req->qtcb->header.port_handle = unit->port->handle; + req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; + req->qtcb->bottom.io.service_class = FSF_CLASS_3; + req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) + + sizeof(fcp_dl_t); + + sbale = zfcp_qdio_sbale_req(req); + sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE; + sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - /* put allocated FSF request into hash table */ - spin_lock(&adapter->req_list_lock); - zfcp_reqlist_add(adapter, fsf_req); - spin_unlock(&adapter->req_list_lock); + fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd; + fcp_cmnd_iu->fcp_lun = unit->fcp_lun; + fcp_cmnd_iu->task_management_flags = tm_flags; - inc_seq_no = (fsf_req->qtcb != NULL); + zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT); + if (!zfcp_fsf_req_send(req)) + goto out; - ZFCP_LOG_TRACE("request queue of adapter %s: " - "next free SBAL is %i, %i free SBALs\n", - zfcp_get_busid_by_adapter(adapter), - req_queue->free_index, - atomic_read(&req_queue->free_count)); + zfcp_fsf_req_free(req); + req = NULL; +out: + spin_unlock(&adapter->req_q.lock); + return req; +} - ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, " - "index_in_queue=%i, count=%i, buffers=%p\n", - zfcp_get_busid_by_adapter(adapter), - QDIO_FLAG_SYNC_OUTPUT, - 0, fsf_req->sbal_first, fsf_req->sbal_number, - &req_queue->buffer[fsf_req->sbal_first]); +static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req) +{ + if (req->qtcb->header.fsf_status != FSF_GOOD) + req->status |= ZFCP_STATUS_FSFREQ_ERROR; +} - /* - * adjust the number of free SBALs in request queue as well as - * position of first one - */ - atomic_sub(fsf_req->sbal_number, &req_queue->free_count); - ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count)); - req_queue->free_index += fsf_req->sbal_number; /* increase */ - req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */ - new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req); +/** + * zfcp_fsf_control_file - control file upload/download + * @adapter: pointer to struct zfcp_adapter + * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc + * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise + */ +struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter, + struct zfcp_fsf_cfdc *fsf_cfdc) +{ + volatile struct qdio_buffer_element *sbale; + struct zfcp_fsf_req *req = NULL; + struct fsf_qtcb_bottom_support *bottom; + int direction, retval = -EIO, bytes; + + if (!(adapter->adapter_features & FSF_FEATURE_CFDC)) + return ERR_PTR(-EOPNOTSUPP); + + switch (fsf_cfdc->command) { + case FSF_QTCB_DOWNLOAD_CONTROL_FILE: + direction = SBAL_FLAGS0_TYPE_WRITE; + break; + case FSF_QTCB_UPLOAD_CONTROL_FILE: + direction = SBAL_FLAGS0_TYPE_READ; + break; + default: + return ERR_PTR(-EINVAL); + } - fsf_req->issued = get_clock(); + spin_lock(&adapter->req_q.lock); + if (zfcp_fsf_req_sbal_get(adapter)) + goto out; - retval = do_QDIO(adapter->ccw_device, - QDIO_FLAG_SYNC_OUTPUT, - 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL); + req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL); + if (unlikely(IS_ERR(req))) { + retval = -EPERM; + goto out; + } - if (unlikely(retval)) { - /* Queues are down..... */ - retval = -EIO; - del_timer(&fsf_req->timer); - spin_lock(&adapter->req_list_lock); - zfcp_reqlist_remove(adapter, fsf_req); - spin_unlock(&adapter->req_list_lock); - /* undo changes in request queue made for this request */ - zfcp_qdio_zero_sbals(req_queue->buffer, - fsf_req->sbal_first, fsf_req->sbal_number); - atomic_add(fsf_req->sbal_number, &req_queue->free_count); - req_queue->free_index -= fsf_req->sbal_number; - req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q; - req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */ - zfcp_erp_adapter_reopen(adapter, 0, 116, fsf_req); - } else { - req_queue->distance_from_int = new_distance_from_int; - /* - * increase FSF sequence counter - - * this must only be done for request successfully enqueued to - * QDIO this rejected requests may be cleaned up by calling - * routines resulting in missing sequence counter values - * otherwise, - */ + req->handler = zfcp_fsf_control_file_handler; + + sbale = zfcp_qdio_sbale_req(req); + sbale[0].flags |= direction; - /* Don't increase for unsolicited status */ - if (inc_seq_no) - adapter->fsf_req_seq_no++; + bottom = &req->qtcb->bottom.support; + bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE; + bottom->option = fsf_cfdc->option; - /* count FSF requests pending */ - atomic_inc(&adapter->reqs_active); + bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg, + FSF_MAX_SBALS_PER_REQ); + if (bytes != ZFCP_CFDC_MAX_SIZE) { + retval = -ENOMEM; + zfcp_fsf_req_free(req); + goto out; } - return retval; -} -#undef ZFCP_LOG_AREA + zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); + retval = zfcp_fsf_req_send(req); +out: + spin_unlock(&adapter->req_q.lock); + + if (!retval) { + wait_event(req->completion_wq, + req->status & ZFCP_STATUS_FSFREQ_COMPLETED); + return req; + } + return ERR_PTR(retval); +} diff --git a/drivers/s390/scsi/zfcp_fsf.h b/drivers/s390/scsi/zfcp_fsf.h index 099970b2700..bf94b4da076 100644 --- a/drivers/s390/scsi/zfcp_fsf.h +++ b/drivers/s390/scsi/zfcp_fsf.h @@ -1,27 +1,16 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Interface to the FSF support functions. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ #ifndef FSF_H #define FSF_H +#include <linux/pfn.h> + #define FSF_QTCB_CURRENT_VERSION 0x00000001 /* FSF commands */ @@ -258,6 +247,16 @@ #define FSF_UNIT_ACCESS_EXCLUSIVE 0x02000000 #define FSF_UNIT_ACCESS_OUTBOUND_TRANSFER 0x10000000 +/* FSF interface for CFDC */ +#define ZFCP_CFDC_MAX_SIZE 127 * 1024 +#define ZFCP_CFDC_PAGES PFN_UP(ZFCP_CFDC_MAX_SIZE) + +struct zfcp_fsf_cfdc { + struct scatterlist sg[ZFCP_CFDC_PAGES]; + u32 command; + u32 option; +}; + struct fsf_queue_designator { u8 cssid; u8 chpid; @@ -288,6 +287,18 @@ struct fsf_bit_error_payload { u32 current_transmit_b2b_credit; } __attribute__ ((packed)); +struct fsf_link_down_info { + u32 error_code; + u32 res1; + u8 res2[2]; + u8 primary_status; + u8 ioerr_code; + u8 action_code; + u8 reason_code; + u8 explanation_code; + u8 vendor_specific_code; +} __attribute__ ((packed)); + struct fsf_status_read_buffer { u32 status_type; u32 status_subtype; @@ -298,7 +309,12 @@ struct fsf_status_read_buffer { u32 class; u64 fcp_lun; u8 res3[24]; - u8 payload[FSF_STATUS_READ_PAYLOAD_SIZE]; + union { + u8 data[FSF_STATUS_READ_PAYLOAD_SIZE]; + u32 word[FSF_STATUS_READ_PAYLOAD_SIZE/sizeof(u32)]; + struct fsf_link_down_info link_down_info; + struct fsf_bit_error_payload bit_error; + } payload; } __attribute__ ((packed)); struct fsf_qual_version_error { @@ -311,23 +327,19 @@ struct fsf_qual_sequence_error { u32 res1[3]; } __attribute__ ((packed)); -struct fsf_link_down_info { - u32 error_code; - u32 res1; - u8 res2[2]; - u8 primary_status; - u8 ioerr_code; - u8 action_code; - u8 reason_code; - u8 explanation_code; - u8 vendor_specific_code; +struct fsf_qual_latency_info { + u32 channel_lat; + u32 fabric_lat; + u8 res1[8]; } __attribute__ ((packed)); union fsf_prot_status_qual { + u32 word[FSF_PROT_STATUS_QUAL_SIZE / sizeof(u32)]; u64 doubleword[FSF_PROT_STATUS_QUAL_SIZE / sizeof(u64)]; struct fsf_qual_version_error version_error; struct fsf_qual_sequence_error sequence_error; struct fsf_link_down_info link_down_info; + struct fsf_qual_latency_info latency_info; } __attribute__ ((packed)); struct fsf_qtcb_prefix { @@ -437,7 +449,9 @@ struct fsf_qtcb_bottom_config { u32 fc_link_speed; u32 adapter_type; u32 peer_d_id; - u8 res2[12]; + u8 res1[2]; + u16 timer_interval; + u8 res2[8]; u32 s_id; struct fsf_nport_serv_param nport_serv_param; u8 reserved_nport_serv_param[16]; diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c index 8ca5f074c68..72e3094796d 100644 --- a/drivers/s390/scsi/zfcp_qdio.c +++ b/drivers/s390/scsi/zfcp_qdio.c @@ -1,241 +1,103 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Setup and helper functions to access QDIO. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ #include "zfcp_ext.h" -static void zfcp_qdio_sbal_limit(struct zfcp_fsf_req *, int); -static inline volatile struct qdio_buffer_element *zfcp_qdio_sbale_get - (struct zfcp_qdio_queue *, int, int); -static inline volatile struct qdio_buffer_element *zfcp_qdio_sbale_resp - (struct zfcp_fsf_req *, int, int); -static volatile struct qdio_buffer_element *zfcp_qdio_sbal_chain - (struct zfcp_fsf_req *, unsigned long); -static volatile struct qdio_buffer_element *zfcp_qdio_sbale_next - (struct zfcp_fsf_req *, unsigned long); -static int zfcp_qdio_sbals_zero(struct zfcp_qdio_queue *, int, int); -static inline int zfcp_qdio_sbals_wipe(struct zfcp_fsf_req *); -static void zfcp_qdio_sbale_fill - (struct zfcp_fsf_req *, unsigned long, void *, int); -static int zfcp_qdio_sbals_from_segment - (struct zfcp_fsf_req *, unsigned long, void *, unsigned long); - -static qdio_handler_t zfcp_qdio_request_handler; -static qdio_handler_t zfcp_qdio_response_handler; -static int zfcp_qdio_handler_error_check(struct zfcp_adapter *, - unsigned int, unsigned int, unsigned int, int, int); - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_QDIO - -/* - * Frees BUFFER memory for each of the pointers of the struct qdio_buffer array - * in the adapter struct sbuf is the pointer array. - * - * locks: must only be called with zfcp_data.config_sema taken - */ -static void -zfcp_qdio_buffers_dequeue(struct qdio_buffer **sbuf) -{ - int pos; - - for (pos = 0; pos < QDIO_MAX_BUFFERS_PER_Q; pos += QBUFF_PER_PAGE) - free_page((unsigned long) sbuf[pos]); -} +/* FIXME(tune): free space should be one max. SBAL chain plus what? */ +#define ZFCP_QDIO_PCI_INTERVAL (QDIO_MAX_BUFFERS_PER_Q \ + - (FSF_MAX_SBALS_PER_REQ + 4)) +#define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer)) -/* - * Allocates BUFFER memory to each of the pointers of the qdio_buffer_t - * array in the adapter struct. - * Cur_buf is the pointer array - * - * returns: zero on success else -ENOMEM - * locks: must only be called with zfcp_data.config_sema taken - */ -static int -zfcp_qdio_buffers_enqueue(struct qdio_buffer **sbuf) +static int zfcp_qdio_buffers_enqueue(struct qdio_buffer **sbal) { int pos; for (pos = 0; pos < QDIO_MAX_BUFFERS_PER_Q; pos += QBUFF_PER_PAGE) { - sbuf[pos] = (struct qdio_buffer *) get_zeroed_page(GFP_KERNEL); - if (!sbuf[pos]) { - zfcp_qdio_buffers_dequeue(sbuf); + sbal[pos] = (struct qdio_buffer *) get_zeroed_page(GFP_KERNEL); + if (!sbal[pos]) return -ENOMEM; - } } for (pos = 0; pos < QDIO_MAX_BUFFERS_PER_Q; pos++) if (pos % QBUFF_PER_PAGE) - sbuf[pos] = sbuf[pos - 1] + 1; + sbal[pos] = sbal[pos - 1] + 1; return 0; } -/* locks: must only be called with zfcp_data.config_sema taken */ -int -zfcp_qdio_allocate_queues(struct zfcp_adapter *adapter) +static volatile struct qdio_buffer_element * +zfcp_qdio_sbale(struct zfcp_qdio_queue *q, int sbal_idx, int sbale_idx) { - int ret; - - ret = zfcp_qdio_buffers_enqueue(adapter->request_queue.buffer); - if (ret) - return ret; - return zfcp_qdio_buffers_enqueue(adapter->response_queue.buffer); + return &q->sbal[sbal_idx]->element[sbale_idx]; } -/* locks: must only be called with zfcp_data.config_sema taken */ -void -zfcp_qdio_free_queues(struct zfcp_adapter *adapter) +/** + * zfcp_qdio_free - free memory used by request- and resposne queue + * @adapter: pointer to the zfcp_adapter structure + */ +void zfcp_qdio_free(struct zfcp_adapter *adapter) { - ZFCP_LOG_TRACE("freeing request_queue buffers\n"); - zfcp_qdio_buffers_dequeue(adapter->request_queue.buffer); + struct qdio_buffer **sbal_req, **sbal_resp; + int p; - ZFCP_LOG_TRACE("freeing response_queue buffers\n"); - zfcp_qdio_buffers_dequeue(adapter->response_queue.buffer); -} + if (adapter->ccw_device) + qdio_free(adapter->ccw_device); -int -zfcp_qdio_allocate(struct zfcp_adapter *adapter) -{ - struct qdio_initialize *init_data; + sbal_req = adapter->req_q.sbal; + sbal_resp = adapter->resp_q.sbal; - init_data = &adapter->qdio_init_data; + for (p = 0; p < QDIO_MAX_BUFFERS_PER_Q; p += QBUFF_PER_PAGE) { + free_page((unsigned long) sbal_req[p]); + free_page((unsigned long) sbal_resp[p]); + } +} - init_data->cdev = adapter->ccw_device; - init_data->q_format = QDIO_SCSI_QFMT; - memcpy(init_data->adapter_name, zfcp_get_busid_by_adapter(adapter), 8); - ASCEBC(init_data->adapter_name, 8); - init_data->qib_param_field_format = 0; - init_data->qib_param_field = NULL; - init_data->input_slib_elements = NULL; - init_data->output_slib_elements = NULL; - init_data->min_input_threshold = ZFCP_MIN_INPUT_THRESHOLD; - init_data->max_input_threshold = ZFCP_MAX_INPUT_THRESHOLD; - init_data->min_output_threshold = ZFCP_MIN_OUTPUT_THRESHOLD; - init_data->max_output_threshold = ZFCP_MAX_OUTPUT_THRESHOLD; - init_data->no_input_qs = 1; - init_data->no_output_qs = 1; - init_data->input_handler = zfcp_qdio_response_handler; - init_data->output_handler = zfcp_qdio_request_handler; - init_data->int_parm = (unsigned long) adapter; - init_data->flags = QDIO_INBOUND_0COPY_SBALS | - QDIO_OUTBOUND_0COPY_SBALS | QDIO_USE_OUTBOUND_PCIS; - init_data->input_sbal_addr_array = - (void **) (adapter->response_queue.buffer); - init_data->output_sbal_addr_array = - (void **) (adapter->request_queue.buffer); +static void zfcp_qdio_handler_error(struct zfcp_adapter *adapter, u8 id) +{ + dev_warn(&adapter->ccw_device->dev, "QDIO problem occurred.\n"); - return qdio_allocate(init_data); + zfcp_erp_adapter_reopen(adapter, + ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | + ZFCP_STATUS_COMMON_ERP_FAILED, id, NULL); } -/* - * function: zfcp_qdio_handler_error_check - * - * purpose: called by the response handler to determine error condition - * - * returns: error flag - * - */ -static int -zfcp_qdio_handler_error_check(struct zfcp_adapter *adapter, unsigned int status, - unsigned int qdio_error, unsigned int siga_error, - int first_element, int elements_processed) +static void zfcp_qdio_zero_sbals(struct qdio_buffer *sbal[], int first, int cnt) { - int retval = 0; + int i, sbal_idx; - if (unlikely(status & QDIO_STATUS_LOOK_FOR_ERROR)) { - retval = -EIO; - - ZFCP_LOG_INFO("QDIO problem occurred (status=0x%x, " - "qdio_error=0x%x, siga_error=0x%x)\n", - status, qdio_error, siga_error); - - zfcp_hba_dbf_event_qdio(adapter, status, qdio_error, siga_error, - first_element, elements_processed); - /* - * Restarting IO on the failed adapter from scratch. - * Since we have been using this adapter, it is save to assume - * that it is not failed but recoverable. The card seems to - * report link-up events by self-initiated queue shutdown. - * That is why we need to clear the link-down flag - * which is set again in case we have missed by a mile. - */ - zfcp_erp_adapter_reopen(adapter, - ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | - ZFCP_STATUS_COMMON_ERP_FAILED, 140, - NULL); + for (i = first; i < first + cnt; i++) { + sbal_idx = i % QDIO_MAX_BUFFERS_PER_Q; + memset(sbal[sbal_idx], 0, sizeof(struct qdio_buffer)); } - return retval; } -/* - * function: zfcp_qdio_request_handler - * - * purpose: is called by QDIO layer for completed SBALs in request queue - * - * returns: (void) - */ -static void -zfcp_qdio_request_handler(struct ccw_device *ccw_device, - unsigned int status, - unsigned int qdio_error, - unsigned int siga_error, - unsigned int queue_number, - int first_element, - int elements_processed, - unsigned long int_parm) +static void zfcp_qdio_int_req(struct ccw_device *cdev, unsigned int status, + unsigned int qdio_err, unsigned int siga_err, + unsigned int queue_no, int first, int count, + unsigned long parm) { - struct zfcp_adapter *adapter; - struct zfcp_qdio_queue *queue; - - adapter = (struct zfcp_adapter *) int_parm; - queue = &adapter->request_queue; - - ZFCP_LOG_DEBUG("adapter %s, first=%d, elements_processed=%d\n", - zfcp_get_busid_by_adapter(adapter), - first_element, elements_processed); + struct zfcp_adapter *adapter = (struct zfcp_adapter *) parm; + struct zfcp_qdio_queue *queue = &adapter->req_q; - if (unlikely(zfcp_qdio_handler_error_check(adapter, status, qdio_error, - siga_error, first_element, - elements_processed))) - goto out; - /* - * we stored address of struct zfcp_adapter data structure - * associated with irq in int_parm - */ + if (unlikely(status & QDIO_STATUS_LOOK_FOR_ERROR)) { + zfcp_hba_dbf_event_qdio(adapter, status, qdio_err, siga_err, + first, count); + zfcp_qdio_handler_error(adapter, 140); + return; + } /* cleanup all SBALs being program-owned now */ - zfcp_qdio_zero_sbals(queue->buffer, first_element, elements_processed); + zfcp_qdio_zero_sbals(queue->sbal, first, count); - /* increase free space in outbound queue */ - atomic_add(elements_processed, &queue->free_count); - ZFCP_LOG_DEBUG("free_count=%d\n", atomic_read(&queue->free_count)); + atomic_add(count, &queue->count); wake_up(&adapter->request_wq); - ZFCP_LOG_DEBUG("elements_processed=%d, free count=%d\n", - elements_processed, atomic_read(&queue->free_count)); - out: - return; } -/** - * zfcp_qdio_reqid_check - checks for valid reqids. - */ static void zfcp_qdio_reqid_check(struct zfcp_adapter *adapter, - unsigned long req_id) + unsigned long req_id, int sbal_idx) { struct zfcp_fsf_req *fsf_req; unsigned long flags; @@ -248,203 +110,117 @@ static void zfcp_qdio_reqid_check(struct zfcp_adapter *adapter, * Unknown request means that we have potentially memory * corruption and must stop the machine immediatly. */ - panic("error: unknown request id (%ld) on adapter %s.\n", + panic("error: unknown request id (%lx) on adapter %s.\n", req_id, zfcp_get_busid_by_adapter(adapter)); zfcp_reqlist_remove(adapter, fsf_req); - atomic_dec(&adapter->reqs_active); spin_unlock_irqrestore(&adapter->req_list_lock, flags); - /* finish the FSF request */ + fsf_req->sbal_response = sbal_idx; zfcp_fsf_req_complete(fsf_req); } -/* - * function: zfcp_qdio_response_handler - * - * purpose: is called by QDIO layer for completed SBALs in response queue - * - * returns: (void) - */ -static void -zfcp_qdio_response_handler(struct ccw_device *ccw_device, - unsigned int status, - unsigned int qdio_error, - unsigned int siga_error, - unsigned int queue_number, - int first_element, - int elements_processed, - unsigned long int_parm) +static void zfcp_qdio_resp_put_back(struct zfcp_adapter *adapter, int processed) { - struct zfcp_adapter *adapter; - struct zfcp_qdio_queue *queue; - int buffer_index; - int i; - struct qdio_buffer *buffer; - int retval = 0; - u8 count; - u8 start; - volatile struct qdio_buffer_element *buffere = NULL; - int buffere_index; - - adapter = (struct zfcp_adapter *) int_parm; - queue = &adapter->response_queue; - - if (unlikely(zfcp_qdio_handler_error_check(adapter, status, qdio_error, - siga_error, first_element, - elements_processed))) - goto out; + struct zfcp_qdio_queue *queue = &adapter->resp_q; + struct ccw_device *cdev = adapter->ccw_device; + u8 count, start = queue->first; + unsigned int retval; - /* - * we stored address of struct zfcp_adapter data structure - * associated with irq in int_parm - */ + count = atomic_read(&queue->count) + processed; + + retval = do_QDIO(cdev, QDIO_FLAG_SYNC_INPUT | QDIO_FLAG_UNDER_INTERRUPT, + 0, start, count, NULL); + + if (unlikely(retval)) { + atomic_set(&queue->count, count); + /* FIXME: Recover this with an adapter reopen? */ + } else { + queue->first += count; + queue->first %= QDIO_MAX_BUFFERS_PER_Q; + atomic_set(&queue->count, 0); + } +} + +static void zfcp_qdio_int_resp(struct ccw_device *cdev, unsigned int status, + unsigned int qdio_err, unsigned int siga_err, + unsigned int queue_no, int first, int count, + unsigned long parm) +{ + struct zfcp_adapter *adapter = (struct zfcp_adapter *) parm; + struct zfcp_qdio_queue *queue = &adapter->resp_q; + volatile struct qdio_buffer_element *sbale; + int sbal_idx, sbale_idx, sbal_no; + + if (unlikely(status & QDIO_STATUS_LOOK_FOR_ERROR)) { + zfcp_hba_dbf_event_qdio(adapter, status, qdio_err, siga_err, + first, count); + zfcp_qdio_handler_error(adapter, 147); + return; + } - buffere = &(queue->buffer[first_element]->element[0]); - ZFCP_LOG_DEBUG("first BUFFERE flags=0x%x\n", buffere->flags); /* * go through all SBALs from input queue currently * returned by QDIO layer */ - - for (i = 0; i < elements_processed; i++) { - - buffer_index = first_element + i; - buffer_index %= QDIO_MAX_BUFFERS_PER_Q; - buffer = queue->buffer[buffer_index]; + for (sbal_no = 0; sbal_no < count; sbal_no++) { + sbal_idx = (first + sbal_no) % QDIO_MAX_BUFFERS_PER_Q; /* go through all SBALEs of SBAL */ - for (buffere_index = 0; - buffere_index < QDIO_MAX_ELEMENTS_PER_BUFFER; - buffere_index++) { - - /* look for QDIO request identifiers in SB */ - buffere = &buffer->element[buffere_index]; + for (sbale_idx = 0; sbale_idx < QDIO_MAX_ELEMENTS_PER_BUFFER; + sbale_idx++) { + sbale = zfcp_qdio_sbale(queue, sbal_idx, sbale_idx); zfcp_qdio_reqid_check(adapter, - (unsigned long) buffere->addr); - - /* - * A single used SBALE per inbound SBALE has been - * implemented by QDIO so far. Hope they will - * do some optimisation. Will need to change to - * unlikely() then. - */ - if (likely(buffere->flags & SBAL_FLAGS_LAST_ENTRY)) + (unsigned long) sbale->addr, + sbal_idx); + if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY)) break; }; - if (unlikely(!(buffere->flags & SBAL_FLAGS_LAST_ENTRY))) { - ZFCP_LOG_NORMAL("bug: End of inbound data " - "not marked!\n"); - } + if (unlikely(!(sbale->flags & SBAL_FLAGS_LAST_ENTRY))) + dev_warn(&adapter->ccw_device->dev, + "Protocol violation by adapter. " + "Continuing operations.\n"); } /* * put range of SBALs back to response queue * (including SBALs which have already been free before) */ - count = atomic_read(&queue->free_count) + elements_processed; - start = queue->free_index; - - ZFCP_LOG_TRACE("calling do_QDIO on adapter %s (flags=0x%x, " - "queue_no=%i, index_in_queue=%i, count=%i, " - "buffers=0x%lx\n", - zfcp_get_busid_by_adapter(adapter), - QDIO_FLAG_SYNC_INPUT | QDIO_FLAG_UNDER_INTERRUPT, - 0, start, count, (unsigned long) &queue->buffer[start]); - - retval = do_QDIO(ccw_device, - QDIO_FLAG_SYNC_INPUT | QDIO_FLAG_UNDER_INTERRUPT, - 0, start, count, NULL); - - if (unlikely(retval)) { - atomic_set(&queue->free_count, count); - ZFCP_LOG_DEBUG("clearing of inbound data regions failed, " - "queues may be down " - "(count=%d, start=%d, retval=%d)\n", - count, start, retval); - } else { - queue->free_index += count; - queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; - atomic_set(&queue->free_count, 0); - ZFCP_LOG_TRACE("%i buffers enqueued to response " - "queue at position %i\n", count, start); - } - out: - return; -} - -/** - * zfcp_qdio_sbale_get - return pointer to SBALE of qdio_queue - * @queue: queue from which SBALE should be returned - * @sbal: specifies number of SBAL in queue - * @sbale: specifes number of SBALE in SBAL - */ -static inline volatile struct qdio_buffer_element * -zfcp_qdio_sbale_get(struct zfcp_qdio_queue *queue, int sbal, int sbale) -{ - return &queue->buffer[sbal]->element[sbale]; + zfcp_qdio_resp_put_back(adapter, count); } /** - * zfcp_qdio_sbale_req - return pointer to SBALE of request_queue for - * a struct zfcp_fsf_req + * zfcp_qdio_sbale_req - return ptr to SBALE of req_q for a struct zfcp_fsf_req + * @fsf_req: pointer to struct fsf_req + * Returns: pointer to qdio_buffer_element (SBALE) structure */ volatile struct qdio_buffer_element * -zfcp_qdio_sbale_req(struct zfcp_fsf_req *fsf_req, int sbal, int sbale) +zfcp_qdio_sbale_req(struct zfcp_fsf_req *req) { - return zfcp_qdio_sbale_get(&fsf_req->adapter->request_queue, - sbal, sbale); + return zfcp_qdio_sbale(&req->adapter->req_q, req->sbal_last, 0); } /** - * zfcp_qdio_sbale_resp - return pointer to SBALE of response_queue for - * a struct zfcp_fsf_req - */ -static inline volatile struct qdio_buffer_element * -zfcp_qdio_sbale_resp(struct zfcp_fsf_req *fsf_req, int sbal, int sbale) -{ - return zfcp_qdio_sbale_get(&fsf_req->adapter->response_queue, - sbal, sbale); -} - -/** - * zfcp_qdio_sbale_curr - return current SBALE on request_queue for - * a struct zfcp_fsf_req + * zfcp_qdio_sbale_curr - return curr SBALE on req_q for a struct zfcp_fsf_req + * @fsf_req: pointer to struct fsf_req + * Returns: pointer to qdio_buffer_element (SBALE) structure */ volatile struct qdio_buffer_element * -zfcp_qdio_sbale_curr(struct zfcp_fsf_req *fsf_req) +zfcp_qdio_sbale_curr(struct zfcp_fsf_req *req) { - return zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, - fsf_req->sbale_curr); + return zfcp_qdio_sbale(&req->adapter->req_q, req->sbal_last, + req->sbale_curr); } -/** - * zfcp_qdio_sbal_limit - determine maximum number of SBALs that can be used - * on the request_queue for a struct zfcp_fsf_req - * @fsf_req: the number of the last SBAL that can be used is stored herein - * @max_sbals: used to pass an upper limit for the number of SBALs - * - * Note: We can assume at least one free SBAL in the request_queue when called. - */ -static void -zfcp_qdio_sbal_limit(struct zfcp_fsf_req *fsf_req, int max_sbals) +static void zfcp_qdio_sbal_limit(struct zfcp_fsf_req *fsf_req, int max_sbals) { - int count = atomic_read(&fsf_req->adapter->request_queue.free_count); + int count = atomic_read(&fsf_req->adapter->req_q.count); count = min(count, max_sbals); - fsf_req->sbal_last = fsf_req->sbal_first; - fsf_req->sbal_last += (count - 1); - fsf_req->sbal_last %= QDIO_MAX_BUFFERS_PER_Q; + fsf_req->sbal_limit = (fsf_req->sbal_first + count - 1) + % QDIO_MAX_BUFFERS_PER_Q; } -/** - * zfcp_qdio_sbal_chain - chain SBALs if more than one SBAL is needed for a - * request - * @fsf_req: zfcp_fsf_req to be processed - * @sbtype: SBAL flags which have to be set in first SBALE of new SBAL - * - * This function changes sbal_curr, sbale_curr, sbal_number of fsf_req. - */ static volatile struct qdio_buffer_element * zfcp_qdio_sbal_chain(struct zfcp_fsf_req *fsf_req, unsigned long sbtype) { @@ -455,16 +231,16 @@ zfcp_qdio_sbal_chain(struct zfcp_fsf_req *fsf_req, unsigned long sbtype) sbale->flags |= SBAL_FLAGS_LAST_ENTRY; /* don't exceed last allowed SBAL */ - if (fsf_req->sbal_curr == fsf_req->sbal_last) + if (fsf_req->sbal_last == fsf_req->sbal_limit) return NULL; /* set chaining flag in first SBALE of current SBAL */ - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + sbale = zfcp_qdio_sbale_req(fsf_req); sbale->flags |= SBAL_FLAGS0_MORE_SBALS; /* calculate index of next SBAL */ - fsf_req->sbal_curr++; - fsf_req->sbal_curr %= QDIO_MAX_BUFFERS_PER_Q; + fsf_req->sbal_last++; + fsf_req->sbal_last %= QDIO_MAX_BUFFERS_PER_Q; /* keep this requests number of SBALs up-to-date */ fsf_req->sbal_number++; @@ -479,214 +255,255 @@ zfcp_qdio_sbal_chain(struct zfcp_fsf_req *fsf_req, unsigned long sbtype) return sbale; } -/** - * zfcp_qdio_sbale_next - switch to next SBALE, chain SBALs if needed - */ static volatile struct qdio_buffer_element * zfcp_qdio_sbale_next(struct zfcp_fsf_req *fsf_req, unsigned long sbtype) { if (fsf_req->sbale_curr == ZFCP_LAST_SBALE_PER_SBAL) return zfcp_qdio_sbal_chain(fsf_req, sbtype); - fsf_req->sbale_curr++; - return zfcp_qdio_sbale_curr(fsf_req); } -/** - * zfcp_qdio_sbals_zero - initialize SBALs between first and last in queue - * with zero from - */ -static int -zfcp_qdio_sbals_zero(struct zfcp_qdio_queue *queue, int first, int last) -{ - struct qdio_buffer **buf = queue->buffer; - int curr = first; - int count = 0; - - for(;;) { - curr %= QDIO_MAX_BUFFERS_PER_Q; - count++; - memset(buf[curr], 0, sizeof(struct qdio_buffer)); - if (curr == last) - break; - curr++; - } - return count; -} - - -/** - * zfcp_qdio_sbals_wipe - reset all changes in SBALs for an fsf_req - */ -static inline int -zfcp_qdio_sbals_wipe(struct zfcp_fsf_req *fsf_req) +static void zfcp_qdio_undo_sbals(struct zfcp_fsf_req *fsf_req) { - return zfcp_qdio_sbals_zero(&fsf_req->adapter->request_queue, - fsf_req->sbal_first, fsf_req->sbal_curr); + struct qdio_buffer **sbal = fsf_req->adapter->req_q.sbal; + int first = fsf_req->sbal_first; + int last = fsf_req->sbal_last; + int count = (last - first + QDIO_MAX_BUFFERS_PER_Q) % + QDIO_MAX_BUFFERS_PER_Q + 1; + zfcp_qdio_zero_sbals(sbal, first, count); } - -/** - * zfcp_qdio_sbale_fill - set address and length in current SBALE - * on request_queue - */ -static void -zfcp_qdio_sbale_fill(struct zfcp_fsf_req *fsf_req, unsigned long sbtype, - void *addr, int length) +static int zfcp_qdio_fill_sbals(struct zfcp_fsf_req *fsf_req, + unsigned int sbtype, void *start_addr, + unsigned int total_length) { volatile struct qdio_buffer_element *sbale; - - sbale = zfcp_qdio_sbale_curr(fsf_req); - sbale->addr = addr; - sbale->length = length; -} - -/** - * zfcp_qdio_sbals_from_segment - map memory segment to SBALE(s) - * @fsf_req: request to be processed - * @sbtype: SBALE flags - * @start_addr: address of memory segment - * @total_length: length of memory segment - * - * Alignment and length of the segment determine how many SBALEs are needed - * for the memory segment. - */ -static int -zfcp_qdio_sbals_from_segment(struct zfcp_fsf_req *fsf_req, unsigned long sbtype, - void *start_addr, unsigned long total_length) -{ unsigned long remaining, length; void *addr; - /* split segment up heeding page boundaries */ + /* split segment up */ for (addr = start_addr, remaining = total_length; remaining > 0; addr += length, remaining -= length) { - /* get next free SBALE for new piece */ - if (NULL == zfcp_qdio_sbale_next(fsf_req, sbtype)) { - /* no SBALE left, clean up and leave */ - zfcp_qdio_sbals_wipe(fsf_req); + sbale = zfcp_qdio_sbale_next(fsf_req, sbtype); + if (!sbale) { + zfcp_qdio_undo_sbals(fsf_req); return -EINVAL; } - /* calculate length of new piece */ + + /* new piece must not exceed next page boundary */ length = min(remaining, - (PAGE_SIZE - ((unsigned long) addr & + (PAGE_SIZE - ((unsigned long)addr & (PAGE_SIZE - 1)))); - /* fill current SBALE with calculated piece */ - zfcp_qdio_sbale_fill(fsf_req, sbtype, addr, length); + sbale->addr = addr; + sbale->length = length; } - return total_length; + return 0; } - /** * zfcp_qdio_sbals_from_sg - fill SBALs from scatter-gather list * @fsf_req: request to be processed * @sbtype: SBALE flags * @sg: scatter-gather list - * @sg_count: number of elements in scatter-gather list * @max_sbals: upper bound for number of SBALs to be used + * Returns: number of bytes, or error (negativ) */ -int -zfcp_qdio_sbals_from_sg(struct zfcp_fsf_req *fsf_req, unsigned long sbtype, - struct scatterlist *sgl, int sg_count, int max_sbals) +int zfcp_qdio_sbals_from_sg(struct zfcp_fsf_req *fsf_req, unsigned long sbtype, + struct scatterlist *sg, int max_sbals) { - int sg_index; - struct scatterlist *sg_segment; - int retval; volatile struct qdio_buffer_element *sbale; - int bytes = 0; + int retval, bytes = 0; /* figure out last allowed SBAL */ zfcp_qdio_sbal_limit(fsf_req, max_sbals); - /* set storage-block type for current SBAL */ - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + /* set storage-block type for this request */ + sbale = zfcp_qdio_sbale_req(fsf_req); sbale->flags |= sbtype; - /* process all segements of scatter-gather list */ - for_each_sg(sgl, sg_segment, sg_count, sg_index) { - retval = zfcp_qdio_sbals_from_segment( - fsf_req, - sbtype, - zfcp_sg_to_address(sg_segment), - sg_segment->length); - if (retval < 0) { - bytes = retval; - goto out; - } else - bytes += retval; + for (; sg; sg = sg_next(sg)) { + retval = zfcp_qdio_fill_sbals(fsf_req, sbtype, sg_virt(sg), + sg->length); + if (retval < 0) + return retval; + bytes += sg->length; } + /* assume that no other SBALEs are to follow in the same SBAL */ sbale = zfcp_qdio_sbale_curr(fsf_req); sbale->flags |= SBAL_FLAGS_LAST_ENTRY; -out: + return bytes; } - /** - * zfcp_qdio_sbals_from_scsicmnd - fill SBALs from scsi command - * @fsf_req: request to be processed - * @sbtype: SBALE flags - * @scsi_cmnd: either scatter-gather list or buffer contained herein is used - * to fill SBALs + * zfcp_qdio_send - set PCI flag in first SBALE and send req to QDIO + * @fsf_req: pointer to struct zfcp_fsf_req + * Returns: 0 on success, error otherwise */ -int -zfcp_qdio_sbals_from_scsicmnd(struct zfcp_fsf_req *fsf_req, - unsigned long sbtype, struct scsi_cmnd *scsi_cmnd) +int zfcp_qdio_send(struct zfcp_fsf_req *fsf_req) { - return zfcp_qdio_sbals_from_sg(fsf_req, sbtype, scsi_sglist(scsi_cmnd), - scsi_sg_count(scsi_cmnd), - ZFCP_MAX_SBALS_PER_REQ); + struct zfcp_adapter *adapter = fsf_req->adapter; + struct zfcp_qdio_queue *req_q = &adapter->req_q; + int first = fsf_req->sbal_first; + int count = fsf_req->sbal_number; + int retval, pci, pci_batch; + volatile struct qdio_buffer_element *sbale; + + /* acknowledgements for transferred buffers */ + pci_batch = req_q->pci_batch + count; + if (unlikely(pci_batch >= ZFCP_QDIO_PCI_INTERVAL)) { + pci_batch %= ZFCP_QDIO_PCI_INTERVAL; + pci = first + count - (pci_batch + 1); + pci %= QDIO_MAX_BUFFERS_PER_Q; + sbale = zfcp_qdio_sbale(req_q, pci, 0); + sbale->flags |= SBAL_FLAGS0_PCI; + } + + retval = do_QDIO(adapter->ccw_device, QDIO_FLAG_SYNC_OUTPUT, 0, first, + count, NULL); + if (unlikely(retval)) { + zfcp_qdio_zero_sbals(req_q->sbal, first, count); + return retval; + } + + /* account for transferred buffers */ + atomic_sub(count, &req_q->count); + req_q->first += count; + req_q->first %= QDIO_MAX_BUFFERS_PER_Q; + req_q->pci_batch = pci_batch; + return 0; } /** - * zfcp_qdio_determine_pci - set PCI flag in first SBALE on qdio queue if needed + * zfcp_qdio_allocate - allocate queue memory and initialize QDIO data + * @adapter: pointer to struct zfcp_adapter + * Returns: -ENOMEM on memory allocation error or return value from + * qdio_allocate */ -int -zfcp_qdio_determine_pci(struct zfcp_qdio_queue *req_queue, - struct zfcp_fsf_req *fsf_req) +int zfcp_qdio_allocate(struct zfcp_adapter *adapter) { - int new_distance_from_int; - int pci_pos; - volatile struct qdio_buffer_element *sbale; + struct qdio_initialize *init_data; - new_distance_from_int = req_queue->distance_from_int + - fsf_req->sbal_number; - - if (unlikely(new_distance_from_int >= ZFCP_QDIO_PCI_INTERVAL)) { - new_distance_from_int %= ZFCP_QDIO_PCI_INTERVAL; - pci_pos = fsf_req->sbal_first; - pci_pos += fsf_req->sbal_number; - pci_pos -= new_distance_from_int; - pci_pos -= 1; - pci_pos %= QDIO_MAX_BUFFERS_PER_Q; - sbale = zfcp_qdio_sbale_req(fsf_req, pci_pos, 0); - sbale->flags |= SBAL_FLAGS0_PCI; - } - return new_distance_from_int; + if (zfcp_qdio_buffers_enqueue(adapter->req_q.sbal) || + zfcp_qdio_buffers_enqueue(adapter->resp_q.sbal)) + return -ENOMEM; + + init_data = &adapter->qdio_init_data; + + init_data->cdev = adapter->ccw_device; + init_data->q_format = QDIO_ZFCP_QFMT; + memcpy(init_data->adapter_name, zfcp_get_busid_by_adapter(adapter), 8); + ASCEBC(init_data->adapter_name, 8); + init_data->qib_param_field_format = 0; + init_data->qib_param_field = NULL; + init_data->input_slib_elements = NULL; + init_data->output_slib_elements = NULL; + init_data->min_input_threshold = 1; + init_data->max_input_threshold = 5000; + init_data->min_output_threshold = 1; + init_data->max_output_threshold = 1000; + init_data->no_input_qs = 1; + init_data->no_output_qs = 1; + init_data->input_handler = zfcp_qdio_int_resp; + init_data->output_handler = zfcp_qdio_int_req; + init_data->int_parm = (unsigned long) adapter; + init_data->flags = QDIO_INBOUND_0COPY_SBALS | + QDIO_OUTBOUND_0COPY_SBALS | QDIO_USE_OUTBOUND_PCIS; + init_data->input_sbal_addr_array = + (void **) (adapter->resp_q.sbal); + init_data->output_sbal_addr_array = + (void **) (adapter->req_q.sbal); + + return qdio_allocate(init_data); } -/* - * function: zfcp_zero_sbals - * - * purpose: zeros specified range of SBALs - * - * returns: +/** + * zfcp_close_qdio - close qdio queues for an adapter */ -void -zfcp_qdio_zero_sbals(struct qdio_buffer *buf[], int first, int clean_count) +void zfcp_qdio_close(struct zfcp_adapter *adapter) { - int cur_pos; - int index; - - for (cur_pos = first; cur_pos < (first + clean_count); cur_pos++) { - index = cur_pos % QDIO_MAX_BUFFERS_PER_Q; - memset(buf[index], 0, sizeof (struct qdio_buffer)); - ZFCP_LOG_TRACE("zeroing BUFFER %d at address %p\n", - index, buf[index]); + struct zfcp_qdio_queue *req_q; + int first, count; + + if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) + return; + + /* clear QDIOUP flag, thus do_QDIO is not called during qdio_shutdown */ + req_q = &adapter->req_q; + spin_lock(&req_q->lock); + atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status); + spin_unlock(&req_q->lock); + + while (qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR) + == -EINPROGRESS) + ssleep(1); + + /* cleanup used outbound sbals */ + count = atomic_read(&req_q->count); + if (count < QDIO_MAX_BUFFERS_PER_Q) { + first = (req_q->first + count) % QDIO_MAX_BUFFERS_PER_Q; + count = QDIO_MAX_BUFFERS_PER_Q - count; + zfcp_qdio_zero_sbals(req_q->sbal, first, count); } + req_q->first = 0; + atomic_set(&req_q->count, 0); + req_q->pci_batch = 0; + adapter->resp_q.first = 0; + atomic_set(&adapter->resp_q.count, 0); } -#undef ZFCP_LOG_AREA +/** + * zfcp_qdio_open - prepare and initialize response queue + * @adapter: pointer to struct zfcp_adapter + * Returns: 0 on success, otherwise -EIO + */ +int zfcp_qdio_open(struct zfcp_adapter *adapter) +{ + volatile struct qdio_buffer_element *sbale; + int cc; + + if (atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) + return -EIO; + + if (qdio_establish(&adapter->qdio_init_data)) { + dev_err(&adapter->ccw_device->dev, + "Establish of QDIO queues failed.\n"); + return -EIO; + } + + if (qdio_activate(adapter->ccw_device, 0)) { + dev_err(&adapter->ccw_device->dev, + "Activate of QDIO queues failed.\n"); + goto failed_qdio; + } + + for (cc = 0; cc < QDIO_MAX_BUFFERS_PER_Q; cc++) { + sbale = &(adapter->resp_q.sbal[cc]->element[0]); + sbale->length = 0; + sbale->flags = SBAL_FLAGS_LAST_ENTRY; + sbale->addr = NULL; + } + + if (do_QDIO(adapter->ccw_device, QDIO_FLAG_SYNC_INPUT, 0, 0, + QDIO_MAX_BUFFERS_PER_Q, NULL)) { + dev_err(&adapter->ccw_device->dev, + "Init of QDIO response queue failed.\n"); + goto failed_qdio; + } + + /* set index of first avalable SBALS / number of available SBALS */ + adapter->req_q.first = 0; + atomic_set(&adapter->req_q.count, QDIO_MAX_BUFFERS_PER_Q); + adapter->req_q.pci_batch = 0; + + return 0; + +failed_qdio: + while (qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR) + == -EINPROGRESS) + ssleep(1); + + return -EIO; +} diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c index 01687559dc0..aeae56b00b4 100644 --- a/drivers/s390/scsi/zfcp_scsi.c +++ b/drivers/s390/scsi/zfcp_scsi.c @@ -1,220 +1,65 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Interface to Linux SCSI midlayer. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_SCSI - #include "zfcp_ext.h" #include <asm/atomic.h> -static void zfcp_scsi_slave_destroy(struct scsi_device *sdp); -static int zfcp_scsi_slave_alloc(struct scsi_device *sdp); -static int zfcp_scsi_slave_configure(struct scsi_device *sdp); -static int zfcp_scsi_queuecommand(struct scsi_cmnd *, - void (*done) (struct scsi_cmnd *)); -static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *); -static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *); -static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *); -static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *); -static int zfcp_task_management_function(struct zfcp_unit *, u8, - struct scsi_cmnd *); - -static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *, int, - unsigned int, unsigned int); - -static struct device_attribute *zfcp_sysfs_sdev_attrs[]; -static struct device_attribute *zfcp_a_stats_attrs[]; - -struct zfcp_data zfcp_data = { - .scsi_host_template = { - .name = ZFCP_NAME, - .module = THIS_MODULE, - .proc_name = "zfcp", - .slave_alloc = zfcp_scsi_slave_alloc, - .slave_configure = zfcp_scsi_slave_configure, - .slave_destroy = zfcp_scsi_slave_destroy, - .queuecommand = zfcp_scsi_queuecommand, - .eh_abort_handler = zfcp_scsi_eh_abort_handler, - .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, - .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, - .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, - .can_queue = 4096, - .this_id = -1, - .sg_tablesize = ZFCP_MAX_SBALES_PER_REQ, - .cmd_per_lun = 1, - .use_clustering = 1, - .sdev_attrs = zfcp_sysfs_sdev_attrs, - .max_sectors = ZFCP_MAX_SECTORS, - .shost_attrs = zfcp_a_stats_attrs, - }, - .driver_version = ZFCP_VERSION, -}; - -/* Find start of Response Information in FCP response unit*/ -char * -zfcp_get_fcp_rsp_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu) -{ - char *fcp_rsp_info_ptr; - - fcp_rsp_info_ptr = - (unsigned char *) fcp_rsp_iu + (sizeof (struct fcp_rsp_iu)); - - return fcp_rsp_info_ptr; -} - /* Find start of Sense Information in FCP response unit*/ -char * -zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu) +char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu) { char *fcp_sns_info_ptr; - fcp_sns_info_ptr = - (unsigned char *) fcp_rsp_iu + (sizeof (struct fcp_rsp_iu)); + fcp_sns_info_ptr = (unsigned char *) &fcp_rsp_iu[1]; if (fcp_rsp_iu->validity.bits.fcp_rsp_len_valid) - fcp_sns_info_ptr = (char *) fcp_sns_info_ptr + - fcp_rsp_iu->fcp_rsp_len; + fcp_sns_info_ptr += fcp_rsp_iu->fcp_rsp_len; return fcp_sns_info_ptr; } -static fcp_dl_t * -zfcp_get_fcp_dl_ptr(struct fcp_cmnd_iu * fcp_cmd) +void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, fcp_dl_t fcp_dl) { - int additional_length = fcp_cmd->add_fcp_cdb_length << 2; - fcp_dl_t *fcp_dl_addr; + fcp_dl_t *fcp_dl_ptr; - fcp_dl_addr = (fcp_dl_t *) - ((unsigned char *) fcp_cmd + - sizeof (struct fcp_cmnd_iu) + additional_length); /* * fcp_dl_addr = start address of fcp_cmnd structure + * size of fixed part + size of dynamically sized add_dcp_cdb field * SEE FCP-2 documentation */ - return fcp_dl_addr; + fcp_dl_ptr = (fcp_dl_t *) ((unsigned char *) &fcp_cmd[1] + + (fcp_cmd->add_fcp_cdb_length << 2)); + *fcp_dl_ptr = fcp_dl; } -fcp_dl_t -zfcp_get_fcp_dl(struct fcp_cmnd_iu * fcp_cmd) -{ - return *zfcp_get_fcp_dl_ptr(fcp_cmd); -} - -void -zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, fcp_dl_t fcp_dl) -{ - *zfcp_get_fcp_dl_ptr(fcp_cmd) = fcp_dl; -} - -/* - * note: it's a bit-or operation not an assignment - * regarding the specified byte - */ -static inline void -set_byte(int *result, char status, char pos) -{ - *result |= status << (pos * 8); -} - -void -set_host_byte(int *result, char status) -{ - set_byte(result, status, 2); -} - -void -set_driver_byte(int *result, char status) -{ - set_byte(result, status, 3); -} - -static int -zfcp_scsi_slave_alloc(struct scsi_device *sdp) -{ - struct zfcp_adapter *adapter; - struct zfcp_unit *unit; - unsigned long flags; - int retval = -ENXIO; - - adapter = (struct zfcp_adapter *) sdp->host->hostdata[0]; - if (!adapter) - goto out; - - read_lock_irqsave(&zfcp_data.config_lock, flags); - unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun); - if (unit && atomic_test_mask(ZFCP_STATUS_UNIT_REGISTERED, - &unit->status)) { - sdp->hostdata = unit; - unit->device = sdp; - zfcp_unit_get(unit); - retval = 0; - } - read_unlock_irqrestore(&zfcp_data.config_lock, flags); - out: - return retval; -} - -/** - * zfcp_scsi_slave_destroy - called when scsi device is removed - * - * Remove reference to associated scsi device for an zfcp_unit. - * Mark zfcp_unit as failed. The scsi device might be deleted via sysfs - * or a scan for this device might have failed. - */ static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt) { struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata; - + WARN_ON(!unit); if (unit) { atomic_clear_mask(ZFCP_STATUS_UNIT_REGISTERED, &unit->status); sdpnt->hostdata = NULL; unit->device = NULL; zfcp_erp_unit_failed(unit, 12, NULL); zfcp_unit_put(unit); - } else - ZFCP_LOG_NORMAL("bug: no unit associated with SCSI device at " - "address %p\n", sdpnt); + } } -/* - * called from scsi midlayer to allow finetuning of a device. - */ -static int -zfcp_scsi_slave_configure(struct scsi_device *sdp) +static int zfcp_scsi_slave_configure(struct scsi_device *sdp) { if (sdp->tagged_supported) - scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, ZFCP_CMND_PER_LUN); + scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, 32); else scsi_adjust_queue_depth(sdp, 0, 1); return 0; } -/** - * zfcp_scsi_command_fail - set result in scsi_cmnd and call scsi_done function - * @scpnt: pointer to struct scsi_cmnd where result is set - * @result: result to be set in scpnt (e.g. DID_ERROR) - */ -static void -zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) +static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) { - set_host_byte(&scpnt->result, result); + set_host_byte(scpnt, result); if ((scpnt->device != NULL) && (scpnt->device->host != NULL)) zfcp_scsi_dbf_event_result("fail", 4, (struct zfcp_adapter*) scpnt->device->host->hostdata[0], @@ -223,114 +68,13 @@ zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) scpnt->scsi_done(scpnt); } -/** - * zfcp_scsi_command_async - worker for zfcp_scsi_queuecommand and - * zfcp_scsi_command_sync - * @adapter: adapter where scsi command is issued - * @unit: unit to which scsi command is sent - * @scpnt: scsi command to be sent - * @timer: timer to be started if request is successfully initiated - * - * Note: In scsi_done function must be set in scpnt. - */ -int -zfcp_scsi_command_async(struct zfcp_adapter *adapter, struct zfcp_unit *unit, - struct scsi_cmnd *scpnt, int use_timer) -{ - int tmp; - int retval; - - retval = 0; - - BUG_ON((adapter == NULL) || (adapter != unit->port->adapter)); - BUG_ON(scpnt->scsi_done == NULL); - - if (unlikely(NULL == unit)) { - zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT); - goto out; - } - - if (unlikely( - atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status) || - !atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status))) { - ZFCP_LOG_DEBUG("stopping SCSI I/O on unit 0x%016Lx on port " - "0x%016Lx on adapter %s\n", - unit->fcp_lun, unit->port->wwpn, - zfcp_get_busid_by_adapter(adapter)); - zfcp_scsi_command_fail(scpnt, DID_ERROR); - goto out; - } - - tmp = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, use_timer, - ZFCP_REQ_AUTO_CLEANUP); - if (unlikely(tmp == -EBUSY)) { - ZFCP_LOG_DEBUG("adapter %s not ready or unit 0x%016Lx " - "on port 0x%016Lx in recovery\n", - zfcp_get_busid_by_unit(unit), - unit->fcp_lun, unit->port->wwpn); - zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT); - goto out; - } - - if (unlikely(tmp < 0)) { - ZFCP_LOG_DEBUG("error: initiation of Send FCP Cmnd failed\n"); - retval = SCSI_MLQUEUE_HOST_BUSY; - } - -out: - return retval; -} - -static void -zfcp_scsi_command_sync_handler(struct scsi_cmnd *scpnt) -{ - struct completion *wait = (struct completion *) scpnt->SCp.ptr; - complete(wait); -} - - -/** - * zfcp_scsi_command_sync - send a SCSI command and wait for completion - * @unit: unit where command is sent to - * @scpnt: scsi command to be sent - * @use_timer: indicates whether timer should be setup or not - * Return: 0 - * - * Errors are indicated in scpnt->result - */ -int -zfcp_scsi_command_sync(struct zfcp_unit *unit, struct scsi_cmnd *scpnt, - int use_timer) -{ - int ret; - DECLARE_COMPLETION_ONSTACK(wait); - - scpnt->SCp.ptr = (void *) &wait; /* silent re-use */ - scpnt->scsi_done = zfcp_scsi_command_sync_handler; - ret = zfcp_scsi_command_async(unit->port->adapter, unit, scpnt, - use_timer); - if (ret == 0) - wait_for_completion(&wait); - - scpnt->SCp.ptr = NULL; - - return 0; -} - -/* - * function: zfcp_scsi_queuecommand - * - * purpose: enqueues a SCSI command to the specified target device - * - * returns: 0 - success, SCSI command enqueued - * !0 - failure - */ -static int -zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, - void (*done) (struct scsi_cmnd *)) +static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, + void (*done) (struct scsi_cmnd *)) { struct zfcp_unit *unit; struct zfcp_adapter *adapter; + int status; + int ret; /* reset the status for this request */ scpnt->result = 0; @@ -342,44 +86,76 @@ zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, * (stored there by zfcp_scsi_slave_alloc) */ adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; - unit = (struct zfcp_unit *) scpnt->device->hostdata; + unit = scpnt->device->hostdata; + + BUG_ON(!adapter || (adapter != unit->port->adapter)); + BUG_ON(!scpnt->scsi_done); - return zfcp_scsi_command_async(adapter, unit, scpnt, 0); + if (unlikely(!unit)) { + zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT); + return 0; + } + + status = atomic_read(&unit->status); + if (unlikely((status & ZFCP_STATUS_COMMON_ERP_FAILED) || + !(status & ZFCP_STATUS_COMMON_RUNNING))) { + zfcp_scsi_command_fail(scpnt, DID_ERROR); + return 0;; + } + + ret = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, 0, + ZFCP_REQ_AUTO_CLEANUP); + if (unlikely(ret == -EBUSY)) + zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT); + else if (unlikely(ret < 0)) + return SCSI_MLQUEUE_HOST_BUSY; + + return ret; } -static struct zfcp_unit * -zfcp_unit_lookup(struct zfcp_adapter *adapter, int channel, unsigned int id, - unsigned int lun) +static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter, + int channel, unsigned int id, + unsigned int lun) { struct zfcp_port *port; - struct zfcp_unit *unit, *retval = NULL; + struct zfcp_unit *unit; list_for_each_entry(port, &adapter->port_list_head, list) { if (!port->rport || (id != port->rport->scsi_target_id)) continue; list_for_each_entry(unit, &port->unit_list_head, list) - if (lun == unit->scsi_lun) { - retval = unit; - goto out; - } + if (lun == unit->scsi_lun) + return unit; } - out: + + return NULL; +} + +static int zfcp_scsi_slave_alloc(struct scsi_device *sdp) +{ + struct zfcp_adapter *adapter; + struct zfcp_unit *unit; + unsigned long flags; + int retval = -ENXIO; + + adapter = (struct zfcp_adapter *) sdp->host->hostdata[0]; + if (!adapter) + goto out; + + read_lock_irqsave(&zfcp_data.config_lock, flags); + unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun); + if (unit && + (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_REGISTERED)) { + sdp->hostdata = unit; + unit->device = sdp; + zfcp_unit_get(unit); + retval = 0; + } + read_unlock_irqrestore(&zfcp_data.config_lock, flags); +out: return retval; } -/** - * zfcp_scsi_eh_abort_handler - abort the specified SCSI command - * @scpnt: pointer to scsi_cmnd to be aborted - * Return: SUCCESS - command has been aborted and cleaned up in internal - * bookkeeping, SCSI stack won't be called for aborted command - * FAILED - otherwise - * - * We do not need to care for a SCSI command which completes normally - * but late during this abort routine runs. We are allowed to return - * late commands to the SCSI stack. It tracks the state of commands and - * will handle late commands. (Usually, the normal completion of late - * commands is ignored with respect to the running abort operation.) - */ static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) { struct Scsi_Host *scsi_host; @@ -387,44 +163,37 @@ static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) struct zfcp_unit *unit; struct zfcp_fsf_req *fsf_req; unsigned long flags; - unsigned long old_req_id; + unsigned long old_req_id = (unsigned long) scpnt->host_scribble; int retval = SUCCESS; scsi_host = scpnt->device->host; adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; - unit = (struct zfcp_unit *) scpnt->device->hostdata; - - ZFCP_LOG_INFO("aborting scsi_cmnd=%p on adapter %s\n", - scpnt, zfcp_get_busid_by_adapter(adapter)); + unit = scpnt->device->hostdata; /* avoid race condition between late normal completion and abort */ write_lock_irqsave(&adapter->abort_lock, flags); /* Check whether corresponding fsf_req is still pending */ spin_lock(&adapter->req_list_lock); - fsf_req = zfcp_reqlist_find(adapter, - (unsigned long) scpnt->host_scribble); + fsf_req = zfcp_reqlist_find(adapter, old_req_id); spin_unlock(&adapter->req_list_lock); if (!fsf_req) { write_unlock_irqrestore(&adapter->abort_lock, flags); zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL, 0); - retval = SUCCESS; - goto out; + return retval; } - fsf_req->data = 0; + fsf_req->data = NULL; fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTING; - old_req_id = fsf_req->req_id; /* don't access old fsf_req after releasing the abort_lock */ write_unlock_irqrestore(&adapter->abort_lock, flags); fsf_req = zfcp_fsf_abort_fcp_command(old_req_id, adapter, unit, 0); if (!fsf_req) { - ZFCP_LOG_INFO("error: initiation of Abort FCP Cmnd failed\n"); zfcp_scsi_dbf_event_abort("nres", adapter, scpnt, NULL, old_req_id); retval = FAILED; - goto out; + return retval; } __wait_event(fsf_req->completion_wq, @@ -432,66 +201,29 @@ static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) { zfcp_scsi_dbf_event_abort("okay", adapter, scpnt, fsf_req, 0); - retval = SUCCESS; } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) { zfcp_scsi_dbf_event_abort("lte2", adapter, scpnt, fsf_req, 0); - retval = SUCCESS; } else { zfcp_scsi_dbf_event_abort("fail", adapter, scpnt, fsf_req, 0); retval = FAILED; } zfcp_fsf_req_free(fsf_req); - out: - return retval; -} - -static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) -{ - int retval; - struct zfcp_unit *unit = scpnt->device->hostdata; - if (!unit) { - WARN_ON(1); - return SUCCESS; - } - retval = zfcp_task_management_function(unit, - FCP_LOGICAL_UNIT_RESET, - scpnt); - return retval ? FAILED : SUCCESS; -} - -static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) -{ - int retval; - struct zfcp_unit *unit = scpnt->device->hostdata; - - if (!unit) { - WARN_ON(1); - return SUCCESS; - } - retval = zfcp_task_management_function(unit, FCP_TARGET_RESET, scpnt); - return retval ? FAILED : SUCCESS; + return retval; } -static int -zfcp_task_management_function(struct zfcp_unit *unit, u8 tm_flags, - struct scsi_cmnd *scpnt) +static int zfcp_task_mgmt_function(struct zfcp_unit *unit, u8 tm_flags, + struct scsi_cmnd *scpnt) { struct zfcp_adapter *adapter = unit->port->adapter; struct zfcp_fsf_req *fsf_req; - int retval = 0; + int retval = SUCCESS; /* issue task management function */ - fsf_req = zfcp_fsf_send_fcp_command_task_management - (adapter, unit, tm_flags, 0); + fsf_req = zfcp_fsf_send_fcp_ctm(adapter, unit, tm_flags, 0); if (!fsf_req) { - ZFCP_LOG_INFO("error: creation of task management request " - "failed for unit 0x%016Lx on port 0x%016Lx on " - "adapter %s\n", unit->fcp_lun, unit->port->wwpn, - zfcp_get_busid_by_adapter(adapter)); zfcp_scsi_dbf_event_devreset("nres", tm_flags, unit, scpnt); - retval = -ENOMEM; - goto out; + return FAILED; } __wait_event(fsf_req->completion_wq, @@ -502,87 +234,90 @@ zfcp_task_management_function(struct zfcp_unit *unit, u8 tm_flags, */ if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { zfcp_scsi_dbf_event_devreset("fail", tm_flags, unit, scpnt); - retval = -EIO; + retval = FAILED; } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP) { zfcp_scsi_dbf_event_devreset("nsup", tm_flags, unit, scpnt); - retval = -ENOTSUPP; + retval = FAILED; } else zfcp_scsi_dbf_event_devreset("okay", tm_flags, unit, scpnt); zfcp_fsf_req_free(fsf_req); - out: + return retval; } -/** - * zfcp_scsi_eh_host_reset_handler - handler for host reset - */ +static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) +{ + struct zfcp_unit *unit = scpnt->device->hostdata; + + if (!unit) { + WARN_ON(1); + return SUCCESS; + } + return zfcp_task_mgmt_function(unit, FCP_LOGICAL_UNIT_RESET, scpnt); +} + +static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) +{ + struct zfcp_unit *unit = scpnt->device->hostdata; + + if (!unit) { + WARN_ON(1); + return SUCCESS; + } + return zfcp_task_mgmt_function(unit, FCP_TARGET_RESET, scpnt); +} + static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) { struct zfcp_unit *unit; struct zfcp_adapter *adapter; - unit = (struct zfcp_unit*) scpnt->device->hostdata; + unit = scpnt->device->hostdata; adapter = unit->port->adapter; - - ZFCP_LOG_NORMAL("host reset because of problems with " - "unit 0x%016Lx on port 0x%016Lx, adapter %s\n", - unit->fcp_lun, unit->port->wwpn, - zfcp_get_busid_by_adapter(unit->port->adapter)); - zfcp_erp_adapter_reopen(adapter, 0, 141, scpnt); zfcp_erp_wait(adapter); return SUCCESS; } -int -zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) +int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) { - int retval = 0; - static unsigned int unique_id = 0; + struct ccw_dev_id dev_id; if (adapter->scsi_host) - goto out; + return 0; + ccw_device_get_id(adapter->ccw_device, &dev_id); /* register adapter as SCSI host with mid layer of SCSI stack */ adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template, sizeof (struct zfcp_adapter *)); if (!adapter->scsi_host) { - ZFCP_LOG_NORMAL("error: registration with SCSI stack failed " - "for adapter %s ", - zfcp_get_busid_by_adapter(adapter)); - retval = -EIO; - goto out; + dev_err(&adapter->ccw_device->dev, + "registration with SCSI stack failed."); + return -EIO; } - ZFCP_LOG_DEBUG("host registered, scsi_host=%p\n", adapter->scsi_host); /* tell the SCSI stack some characteristics of this adapter */ adapter->scsi_host->max_id = 1; adapter->scsi_host->max_lun = 1; adapter->scsi_host->max_channel = 0; - adapter->scsi_host->unique_id = unique_id++; /* FIXME */ - adapter->scsi_host->max_cmd_len = ZFCP_MAX_SCSI_CMND_LENGTH; + adapter->scsi_host->unique_id = dev_id.devno; + adapter->scsi_host->max_cmd_len = 255; adapter->scsi_host->transportt = zfcp_data.scsi_transport_template; - /* - * save a pointer to our own adapter data structure within - * hostdata field of SCSI host data structure - */ adapter->scsi_host->hostdata[0] = (unsigned long) adapter; if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { scsi_host_put(adapter->scsi_host); - retval = -EIO; - goto out; + return -EIO; } atomic_set_mask(ZFCP_STATUS_ADAPTER_REGISTERED, &adapter->status); - out: - return retval; + + return 0; } -void -zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) +void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) { struct Scsi_Host *shost; struct zfcp_port *port; @@ -590,10 +325,12 @@ zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) shost = adapter->scsi_host; if (!shost) return; + read_lock_irq(&zfcp_data.config_lock); list_for_each_entry(port, &adapter->port_list_head, list) if (port->rport) port->rport = NULL; + read_unlock_irq(&zfcp_data.config_lock); fc_remove_host(shost); scsi_remove_host(shost); @@ -604,9 +341,6 @@ zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) return; } -/* - * Support functions for FC transport class - */ static struct fc_host_statistics* zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) { @@ -622,13 +356,12 @@ zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) return adapter->fc_stats; } -static void -zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, - struct fsf_qtcb_bottom_port *data, - struct fsf_qtcb_bottom_port *old) +static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, + struct fsf_qtcb_bottom_port *data, + struct fsf_qtcb_bottom_port *old) { - fc_stats->seconds_since_last_reset = data->seconds_since_last_reset - - old->seconds_since_last_reset; + fc_stats->seconds_since_last_reset = + data->seconds_since_last_reset - old->seconds_since_last_reset; fc_stats->tx_frames = data->tx_frames - old->tx_frames; fc_stats->tx_words = data->tx_words - old->tx_words; fc_stats->rx_frames = data->rx_frames - old->rx_frames; @@ -639,26 +372,25 @@ zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; fc_stats->link_failure_count = data->link_failure - old->link_failure; fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; - fc_stats->loss_of_signal_count = data->loss_of_signal - - old->loss_of_signal; - fc_stats->prim_seq_protocol_err_count = data->psp_error_counts - - old->psp_error_counts; - fc_stats->invalid_tx_word_count = data->invalid_tx_words - - old->invalid_tx_words; + fc_stats->loss_of_signal_count = + data->loss_of_signal - old->loss_of_signal; + fc_stats->prim_seq_protocol_err_count = + data->psp_error_counts - old->psp_error_counts; + fc_stats->invalid_tx_word_count = + data->invalid_tx_words - old->invalid_tx_words; fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; - fc_stats->fcp_input_requests = data->input_requests - - old->input_requests; - fc_stats->fcp_output_requests = data->output_requests - - old->output_requests; - fc_stats->fcp_control_requests = data->control_requests - - old->control_requests; + fc_stats->fcp_input_requests = + data->input_requests - old->input_requests; + fc_stats->fcp_output_requests = + data->output_requests - old->output_requests; + fc_stats->fcp_control_requests = + data->control_requests - old->control_requests; fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; } -static void -zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, - struct fsf_qtcb_bottom_port *data) +static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, + struct fsf_qtcb_bottom_port *data) { fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; fc_stats->tx_frames = data->tx_frames; @@ -682,22 +414,14 @@ zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, fc_stats->fcp_output_megabytes = data->output_mb; } -/** - * zfcp_get_fc_host_stats - provide fc_host_statistics for scsi_transport_fc - * - * assumption: scsi_transport_fc synchronizes calls of - * get_fc_host_stats and reset_fc_host_stats - * (XXX to be checked otherwise introduce locking) - */ -static struct fc_host_statistics * -zfcp_get_fc_host_stats(struct Scsi_Host *shost) +static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) { struct zfcp_adapter *adapter; struct fc_host_statistics *fc_stats; struct fsf_qtcb_bottom_port *data; int ret; - adapter = (struct zfcp_adapter *)shost->hostdata[0]; + adapter = (struct zfcp_adapter *)host->hostdata[0]; fc_stats = zfcp_init_fc_host_stats(adapter); if (!fc_stats) return NULL; @@ -709,26 +433,25 @@ zfcp_get_fc_host_stats(struct Scsi_Host *shost) ret = zfcp_fsf_exchange_port_data_sync(adapter, data); if (ret) { kfree(data); - return NULL; /* XXX return zeroed fc_stats? */ + return NULL; } if (adapter->stats_reset && ((jiffies/HZ - adapter->stats_reset) < - data->seconds_since_last_reset)) { + data->seconds_since_last_reset)) zfcp_adjust_fc_host_stats(fc_stats, data, adapter->stats_reset_data); - } else + else zfcp_set_fc_host_stats(fc_stats, data); kfree(data); return fc_stats; } -static void -zfcp_reset_fc_host_stats(struct Scsi_Host *shost) +static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) { struct zfcp_adapter *adapter; - struct fsf_qtcb_bottom_port *data, *old_data; + struct fsf_qtcb_bottom_port *data; int ret; adapter = (struct zfcp_adapter *)shost->hostdata[0]; @@ -737,17 +460,33 @@ zfcp_reset_fc_host_stats(struct Scsi_Host *shost) return; ret = zfcp_fsf_exchange_port_data_sync(adapter, data); - if (ret) { + if (ret) kfree(data); - } else { + else { adapter->stats_reset = jiffies/HZ; - old_data = adapter->stats_reset_data; + kfree(adapter->stats_reset_data); adapter->stats_reset_data = data; /* finally freed in - adater_dequeue */ - kfree(old_data); + adapter_dequeue */ } } +static void zfcp_get_host_port_state(struct Scsi_Host *shost) +{ + struct zfcp_adapter *adapter = + (struct zfcp_adapter *)shost->hostdata[0]; + int status = atomic_read(&adapter->status); + + if ((status & ZFCP_STATUS_COMMON_RUNNING) && + !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) + fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; + else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) + fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; + else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) + fc_host_port_state(shost) = FC_PORTSTATE_ERROR; + else + fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; +} + static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) { rport->dev_loss_tmo = timeout; @@ -770,6 +509,8 @@ struct fc_function_template zfcp_transport_functions = { .get_fc_host_stats = zfcp_get_fc_host_stats, .reset_fc_host_stats = zfcp_reset_fc_host_stats, .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, + .get_host_port_state = zfcp_get_host_port_state, + .show_host_port_state = 1, /* no functions registered for following dynamic attributes but directly set by LLDD */ .show_host_port_type = 1, @@ -778,149 +519,26 @@ struct fc_function_template zfcp_transport_functions = { .disable_target_scan = 1, }; -/** - * ZFCP_DEFINE_SCSI_ATTR - * @_name: name of show attribute - * @_format: format string - * @_value: value to print - * - * Generates attribute for a unit. - */ -#define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value) \ -static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, struct device_attribute *attr, \ - char *buf) \ -{ \ - struct scsi_device *sdev; \ - struct zfcp_unit *unit; \ - \ - sdev = to_scsi_device(dev); \ - unit = sdev->hostdata; \ - return sprintf(buf, _format, _value); \ -} \ - \ -static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL); - -ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n", zfcp_get_busid_by_unit(unit)); -ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n", unit->port->wwpn); -ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n", unit->fcp_lun); - -static struct device_attribute *zfcp_sysfs_sdev_attrs[] = { - &dev_attr_fcp_lun, - &dev_attr_wwpn, - &dev_attr_hba_id, - NULL -}; - -static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct Scsi_Host *scsi_host = dev_to_shost(dev); - struct fsf_qtcb_bottom_port *qtcb_port; - int retval; - struct zfcp_adapter *adapter; - - adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; - if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)) - return -EOPNOTSUPP; - - qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL); - if (!qtcb_port) - return -ENOMEM; - - retval = zfcp_fsf_exchange_port_data_sync(adapter, qtcb_port); - if (!retval) - retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util, - qtcb_port->cb_util, qtcb_port->a_util); - kfree(qtcb_port); - return retval; -} - -static int zfcp_sysfs_adapter_ex_config(struct device *dev, - struct fsf_statistics_info *stat_inf) -{ - int retval; - struct fsf_qtcb_bottom_config *qtcb_config; - struct Scsi_Host *scsi_host = dev_to_shost(dev); - struct zfcp_adapter *adapter; - - adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; - if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)) - return -EOPNOTSUPP; - - qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config), - GFP_KERNEL); - if (!qtcb_config) - return -ENOMEM; - - retval = zfcp_fsf_exchange_config_data_sync(adapter, qtcb_config); - if (!retval) - *stat_inf = qtcb_config->stat_info; - - kfree(qtcb_config); - return retval; -} - -static ssize_t zfcp_sysfs_adapter_request_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct fsf_statistics_info stat_info; - int retval; - - retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); - if (retval) - return retval; - - return sprintf(buf, "%llu %llu %llu\n", - (unsigned long long) stat_info.input_req, - (unsigned long long) stat_info.output_req, - (unsigned long long) stat_info.control_req); -} - -static ssize_t zfcp_sysfs_adapter_mb_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct fsf_statistics_info stat_info; - int retval; - - retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); - if (retval) - return retval; - - return sprintf(buf, "%llu %llu\n", - (unsigned long long) stat_info.input_mb, - (unsigned long long) stat_info.output_mb); -} - -static ssize_t zfcp_sysfs_adapter_sec_active_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct fsf_statistics_info stat_info; - int retval; - - retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); - if (retval) - return retval; - - return sprintf(buf, "%llu\n", - (unsigned long long) stat_info.seconds_act); -} - -static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL); -static DEVICE_ATTR(requests, S_IRUGO, zfcp_sysfs_adapter_request_show, NULL); -static DEVICE_ATTR(megabytes, S_IRUGO, zfcp_sysfs_adapter_mb_show, NULL); -static DEVICE_ATTR(seconds_active, S_IRUGO, - zfcp_sysfs_adapter_sec_active_show, NULL); - -static struct device_attribute *zfcp_a_stats_attrs[] = { - &dev_attr_utilization, - &dev_attr_requests, - &dev_attr_megabytes, - &dev_attr_seconds_active, - NULL +struct zfcp_data zfcp_data = { + .scsi_host_template = { + .name = "zfcp", + .module = THIS_MODULE, + .proc_name = "zfcp", + .slave_alloc = zfcp_scsi_slave_alloc, + .slave_configure = zfcp_scsi_slave_configure, + .slave_destroy = zfcp_scsi_slave_destroy, + .queuecommand = zfcp_scsi_queuecommand, + .eh_abort_handler = zfcp_scsi_eh_abort_handler, + .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, + .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, + .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, + .can_queue = 4096, + .this_id = -1, + .sg_tablesize = ZFCP_MAX_SBALES_PER_REQ, + .cmd_per_lun = 1, + .use_clustering = 1, + .sdev_attrs = zfcp_sysfs_sdev_attrs, + .max_sectors = (ZFCP_MAX_SBALES_PER_REQ * 8), + .shost_attrs = zfcp_sysfs_shost_attrs, + }, }; - -#undef ZFCP_LOG_AREA diff --git a/drivers/s390/scsi/zfcp_sysfs.c b/drivers/s390/scsi/zfcp_sysfs.c new file mode 100644 index 00000000000..2e85c6c49e7 --- /dev/null +++ b/drivers/s390/scsi/zfcp_sysfs.c @@ -0,0 +1,496 @@ +/* + * zfcp device driver + * + * sysfs attributes. + * + * Copyright IBM Corporation 2008 + */ + +#include "zfcp_ext.h" + +#define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \ +struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\ + _show, _store) +#define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value) \ +static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev, \ + struct device_attribute *at,\ + char *buf) \ +{ \ + struct _feat_def *_feat = dev_get_drvdata(dev); \ + \ + return sprintf(buf, _format, _value); \ +} \ +static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO, \ + zfcp_sysfs_##_feat##_##_name##_show, NULL); + +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, status, "0x%08x\n", + atomic_read(&adapter->status)); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_wwnn, "0x%016llx\n", + adapter->peer_wwnn); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_wwpn, "0x%016llx\n", + adapter->peer_wwpn); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_d_id, "0x%06x\n", + adapter->peer_d_id); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, card_version, "0x%04x\n", + adapter->hydra_version); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, lic_version, "0x%08x\n", + adapter->fsf_lic_version); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, hardware_version, "0x%08x\n", + adapter->hardware_version); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, in_recovery, "%d\n", + (atomic_read(&adapter->status) & + ZFCP_STATUS_COMMON_ERP_INUSE) != 0); + +ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n", + atomic_read(&port->status)); +ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n", + (atomic_read(&port->status) & + ZFCP_STATUS_COMMON_ERP_INUSE) != 0); +ZFCP_DEFINE_ATTR(zfcp_port, port, access_denied, "%d\n", + (atomic_read(&port->status) & + ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0); + +ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n", + atomic_read(&unit->status)); +ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n", + (atomic_read(&unit->status) & + ZFCP_STATUS_COMMON_ERP_INUSE) != 0); +ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n", + (atomic_read(&unit->status) & + ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0); +ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_shared, "%d\n", + (atomic_read(&unit->status) & + ZFCP_STATUS_UNIT_SHARED) != 0); +ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_readonly, "%d\n", + (atomic_read(&unit->status) & + ZFCP_STATUS_UNIT_READONLY) != 0); + +#define ZFCP_SYSFS_FAILED(_feat_def, _feat, _adapter, _mod_id, _reopen_id) \ +static ssize_t zfcp_sysfs_##_feat##_failed_show(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + struct _feat_def *_feat = dev_get_drvdata(dev); \ + \ + if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_ERP_FAILED) \ + return sprintf(buf, "1\n"); \ + else \ + return sprintf(buf, "0\n"); \ +} \ +static ssize_t zfcp_sysfs_##_feat##_failed_store(struct device *dev, \ + struct device_attribute *attr,\ + const char *buf, size_t count)\ +{ \ + struct _feat_def *_feat = dev_get_drvdata(dev); \ + unsigned long val; \ + int retval = 0; \ + \ + down(&zfcp_data.config_sema); \ + if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_REMOVE) { \ + retval = -EBUSY; \ + goto out; \ + } \ + \ + if (strict_strtoul(buf, 0, &val) || val != 0) { \ + retval = -EINVAL; \ + goto out; \ + } \ + \ + zfcp_erp_modify_##_feat##_status(_feat, _mod_id, NULL, \ + ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);\ + zfcp_erp_##_feat##_reopen(_feat, ZFCP_STATUS_COMMON_ERP_FAILED, \ + _reopen_id, NULL); \ + zfcp_erp_wait(_adapter); \ +out: \ + up(&zfcp_data.config_sema); \ + return retval ? retval : (ssize_t) count; \ +} \ +static ZFCP_DEV_ATTR(_feat, failed, S_IWUSR | S_IRUGO, \ + zfcp_sysfs_##_feat##_failed_show, \ + zfcp_sysfs_##_feat##_failed_store); + +ZFCP_SYSFS_FAILED(zfcp_adapter, adapter, adapter, 44, 93); +ZFCP_SYSFS_FAILED(zfcp_port, port, port->adapter, 45, 96); +ZFCP_SYSFS_FAILED(zfcp_unit, unit, unit->port->adapter, 46, 97); + +static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct zfcp_adapter *adapter = dev_get_drvdata(dev); + int ret; + + if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) + return -EBUSY; + + ret = zfcp_scan_ports(adapter); + return ret ? ret : (ssize_t) count; +} +static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL, + zfcp_sysfs_port_rescan_store); + +static ssize_t zfcp_sysfs_port_remove_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct zfcp_adapter *adapter = dev_get_drvdata(dev); + struct zfcp_port *port; + wwn_t wwpn; + int retval = 0; + + down(&zfcp_data.config_sema); + if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) { + retval = -EBUSY; + goto out; + } + + if (strict_strtoull(buf, 0, &wwpn)) { + retval = -EINVAL; + goto out; + } + + write_lock_irq(&zfcp_data.config_lock); + port = zfcp_get_port_by_wwpn(adapter, wwpn); + if (port && (atomic_read(&port->refcount) == 0)) { + zfcp_port_get(port); + atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); + list_move(&port->list, &adapter->port_remove_lh); + } else + port = NULL; + write_unlock_irq(&zfcp_data.config_lock); + + if (!port) { + retval = -ENXIO; + goto out; + } + + zfcp_erp_port_shutdown(port, 0, 92, NULL); + zfcp_erp_wait(adapter); + zfcp_port_put(port); + zfcp_port_dequeue(port); + out: + up(&zfcp_data.config_sema); + return retval ? retval : (ssize_t) count; +} +static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL, + zfcp_sysfs_port_remove_store); + +static struct attribute *zfcp_adapter_attrs[] = { + &dev_attr_adapter_failed.attr, + &dev_attr_adapter_in_recovery.attr, + &dev_attr_adapter_port_remove.attr, + &dev_attr_adapter_port_rescan.attr, + &dev_attr_adapter_peer_wwnn.attr, + &dev_attr_adapter_peer_wwpn.attr, + &dev_attr_adapter_peer_d_id.attr, + &dev_attr_adapter_card_version.attr, + &dev_attr_adapter_lic_version.attr, + &dev_attr_adapter_status.attr, + &dev_attr_adapter_hardware_version.attr, + NULL +}; + +struct attribute_group zfcp_sysfs_adapter_attrs = { + .attrs = zfcp_adapter_attrs, +}; + +static ssize_t zfcp_sysfs_unit_add_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct zfcp_port *port = dev_get_drvdata(dev); + struct zfcp_unit *unit; + fcp_lun_t fcp_lun; + int retval = -EINVAL; + + down(&zfcp_data.config_sema); + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) { + retval = -EBUSY; + goto out; + } + + if (strict_strtoull(buf, 0, &fcp_lun)) + goto out; + + unit = zfcp_unit_enqueue(port, fcp_lun); + if (IS_ERR(unit)) + goto out; + + retval = 0; + + zfcp_erp_unit_reopen(unit, 0, 94, NULL); + zfcp_erp_wait(unit->port->adapter); + zfcp_unit_put(unit); +out: + up(&zfcp_data.config_sema); + return retval ? retval : (ssize_t) count; +} +static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store); + +static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct zfcp_port *port = dev_get_drvdata(dev); + struct zfcp_unit *unit; + fcp_lun_t fcp_lun; + int retval = 0; + + down(&zfcp_data.config_sema); + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) { + retval = -EBUSY; + goto out; + } + + if (strict_strtoull(buf, 0, &fcp_lun)) { + retval = -EINVAL; + goto out; + } + + write_lock_irq(&zfcp_data.config_lock); + unit = zfcp_get_unit_by_lun(port, fcp_lun); + if (unit && (atomic_read(&unit->refcount) == 0)) { + zfcp_unit_get(unit); + atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); + list_move(&unit->list, &port->unit_remove_lh); + } else + unit = NULL; + + write_unlock_irq(&zfcp_data.config_lock); + + if (!unit) { + retval = -ENXIO; + goto out; + } + + zfcp_erp_unit_shutdown(unit, 0, 95, NULL); + zfcp_erp_wait(unit->port->adapter); + zfcp_unit_put(unit); + zfcp_unit_dequeue(unit); +out: + up(&zfcp_data.config_sema); + return retval ? retval : (ssize_t) count; +} +static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store); + +static struct attribute *zfcp_port_ns_attrs[] = { + &dev_attr_port_failed.attr, + &dev_attr_port_in_recovery.attr, + &dev_attr_port_status.attr, + &dev_attr_port_access_denied.attr, + NULL +}; + +/** + * zfcp_sysfs_ns_port_attrs - sysfs attributes for nameserver + */ +struct attribute_group zfcp_sysfs_ns_port_attrs = { + .attrs = zfcp_port_ns_attrs, +}; + +static struct attribute *zfcp_port_no_ns_attrs[] = { + &dev_attr_unit_add.attr, + &dev_attr_unit_remove.attr, + &dev_attr_port_failed.attr, + &dev_attr_port_in_recovery.attr, + &dev_attr_port_status.attr, + &dev_attr_port_access_denied.attr, + NULL +}; + +/** + * zfcp_sysfs_port_attrs - sysfs attributes for all other ports + */ +struct attribute_group zfcp_sysfs_port_attrs = { + .attrs = zfcp_port_no_ns_attrs, +}; + +static struct attribute *zfcp_unit_attrs[] = { + &dev_attr_unit_failed.attr, + &dev_attr_unit_in_recovery.attr, + &dev_attr_unit_status.attr, + &dev_attr_unit_access_denied.attr, + &dev_attr_unit_access_shared.attr, + &dev_attr_unit_access_readonly.attr, + NULL +}; + +struct attribute_group zfcp_sysfs_unit_attrs = { + .attrs = zfcp_unit_attrs, +}; + +#define ZFCP_DEFINE_LATENCY_ATTR(_name) \ +static ssize_t \ +zfcp_sysfs_unit_##_name##_latency_show(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) { \ + struct scsi_device *sdev = to_scsi_device(dev); \ + struct zfcp_unit *unit = sdev->hostdata; \ + struct zfcp_latencies *lat = &unit->latencies; \ + struct zfcp_adapter *adapter = unit->port->adapter; \ + unsigned long flags; \ + unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc; \ + \ + spin_lock_irqsave(&lat->lock, flags); \ + fsum = lat->_name.fabric.sum * adapter->timer_ticks; \ + fmin = lat->_name.fabric.min * adapter->timer_ticks; \ + fmax = lat->_name.fabric.max * adapter->timer_ticks; \ + csum = lat->_name.channel.sum * adapter->timer_ticks; \ + cmin = lat->_name.channel.min * adapter->timer_ticks; \ + cmax = lat->_name.channel.max * adapter->timer_ticks; \ + cc = lat->_name.counter; \ + spin_unlock_irqrestore(&lat->lock, flags); \ + \ + do_div(fsum, 1000); \ + do_div(fmin, 1000); \ + do_div(fmax, 1000); \ + do_div(csum, 1000); \ + do_div(cmin, 1000); \ + do_div(cmax, 1000); \ + \ + return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n", \ + fmin, fmax, fsum, cmin, cmax, csum, cc); \ +} \ +static ssize_t \ +zfcp_sysfs_unit_##_name##_latency_store(struct device *dev, \ + struct device_attribute *attr, \ + const char *buf, size_t count) \ +{ \ + struct scsi_device *sdev = to_scsi_device(dev); \ + struct zfcp_unit *unit = sdev->hostdata; \ + struct zfcp_latencies *lat = &unit->latencies; \ + unsigned long flags; \ + \ + spin_lock_irqsave(&lat->lock, flags); \ + lat->_name.fabric.sum = 0; \ + lat->_name.fabric.min = 0xFFFFFFFF; \ + lat->_name.fabric.max = 0; \ + lat->_name.channel.sum = 0; \ + lat->_name.channel.min = 0xFFFFFFFF; \ + lat->_name.channel.max = 0; \ + lat->_name.counter = 0; \ + spin_unlock_irqrestore(&lat->lock, flags); \ + \ + return (ssize_t) count; \ +} \ +static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO, \ + zfcp_sysfs_unit_##_name##_latency_show, \ + zfcp_sysfs_unit_##_name##_latency_store); + +ZFCP_DEFINE_LATENCY_ATTR(read); +ZFCP_DEFINE_LATENCY_ATTR(write); +ZFCP_DEFINE_LATENCY_ATTR(cmd); + +#define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value) \ +static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, \ + struct device_attribute *attr,\ + char *buf) \ +{ \ + struct scsi_device *sdev = to_scsi_device(dev); \ + struct zfcp_unit *unit = sdev->hostdata; \ + \ + return sprintf(buf, _format, _value); \ +} \ +static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL); + +ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n", + unit->port->adapter->ccw_device->dev.bus_id); +ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n", unit->port->wwpn); +ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n", unit->fcp_lun); + +struct device_attribute *zfcp_sysfs_sdev_attrs[] = { + &dev_attr_fcp_lun, + &dev_attr_wwpn, + &dev_attr_hba_id, + &dev_attr_read_latency, + &dev_attr_write_latency, + &dev_attr_cmd_latency, + NULL +}; + +static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct Scsi_Host *scsi_host = dev_to_shost(dev); + struct fsf_qtcb_bottom_port *qtcb_port; + struct zfcp_adapter *adapter; + int retval; + + adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; + if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)) + return -EOPNOTSUPP; + + qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL); + if (!qtcb_port) + return -ENOMEM; + + retval = zfcp_fsf_exchange_port_data_sync(adapter, qtcb_port); + if (!retval) + retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util, + qtcb_port->cb_util, qtcb_port->a_util); + kfree(qtcb_port); + return retval; +} +static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL); + +static int zfcp_sysfs_adapter_ex_config(struct device *dev, + struct fsf_statistics_info *stat_inf) +{ + struct Scsi_Host *scsi_host = dev_to_shost(dev); + struct fsf_qtcb_bottom_config *qtcb_config; + struct zfcp_adapter *adapter; + int retval; + + adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; + if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)) + return -EOPNOTSUPP; + + qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config), + GFP_KERNEL); + if (!qtcb_config) + return -ENOMEM; + + retval = zfcp_fsf_exchange_config_data_sync(adapter, qtcb_config); + if (!retval) + *stat_inf = qtcb_config->stat_info; + + kfree(qtcb_config); + return retval; +} + +#define ZFCP_SHOST_ATTR(_name, _format, _arg...) \ +static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, \ + struct device_attribute *attr,\ + char *buf) \ +{ \ + struct fsf_statistics_info stat_info; \ + int retval; \ + \ + retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); \ + if (retval) \ + return retval; \ + \ + return sprintf(buf, _format, ## _arg); \ +} \ +static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL); + +ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n", + (unsigned long long) stat_info.input_req, + (unsigned long long) stat_info.output_req, + (unsigned long long) stat_info.control_req); + +ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n", + (unsigned long long) stat_info.input_mb, + (unsigned long long) stat_info.output_mb); + +ZFCP_SHOST_ATTR(seconds_active, "%llu\n", + (unsigned long long) stat_info.seconds_act); + +struct device_attribute *zfcp_sysfs_shost_attrs[] = { + &dev_attr_utilization, + &dev_attr_requests, + &dev_attr_megabytes, + &dev_attr_seconds_active, + NULL +}; diff --git a/drivers/s390/scsi/zfcp_sysfs_adapter.c b/drivers/s390/scsi/zfcp_sysfs_adapter.c deleted file mode 100644 index ccbba4dd3a7..00000000000 --- a/drivers/s390/scsi/zfcp_sysfs_adapter.c +++ /dev/null @@ -1,270 +0,0 @@ -/* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. - * - * (C) Copyright IBM Corp. 2002, 2006 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include "zfcp_ext.h" - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG - -/** - * ZFCP_DEFINE_ADAPTER_ATTR - * @_name: name of show attribute - * @_format: format string - * @_value: value to print - * - * Generates attributes for an adapter. - */ -#define ZFCP_DEFINE_ADAPTER_ATTR(_name, _format, _value) \ -static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, struct device_attribute *attr, \ - char *buf) \ -{ \ - struct zfcp_adapter *adapter; \ - \ - adapter = dev_get_drvdata(dev); \ - return sprintf(buf, _format, _value); \ -} \ - \ -static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL); - -ZFCP_DEFINE_ADAPTER_ATTR(status, "0x%08x\n", atomic_read(&adapter->status)); -ZFCP_DEFINE_ADAPTER_ATTR(peer_wwnn, "0x%016llx\n", adapter->peer_wwnn); -ZFCP_DEFINE_ADAPTER_ATTR(peer_wwpn, "0x%016llx\n", adapter->peer_wwpn); -ZFCP_DEFINE_ADAPTER_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id); -ZFCP_DEFINE_ADAPTER_ATTR(card_version, "0x%04x\n", adapter->hydra_version); -ZFCP_DEFINE_ADAPTER_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version); -ZFCP_DEFINE_ADAPTER_ATTR(hardware_version, "0x%08x\n", - adapter->hardware_version); -ZFCP_DEFINE_ADAPTER_ATTR(in_recovery, "%d\n", atomic_test_mask - (ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status)); - -/** - * zfcp_sysfs_port_add_store - add a port to sysfs tree - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * @count: number of bytes in buffer - * - * Store function of the "port_add" attribute of an adapter. - */ -static ssize_t -zfcp_sysfs_port_add_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) -{ - wwn_t wwpn; - char *endp; - struct zfcp_adapter *adapter; - struct zfcp_port *port; - int retval = -EINVAL; - - down(&zfcp_data.config_sema); - - adapter = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) { - retval = -EBUSY; - goto out; - } - - wwpn = simple_strtoull(buf, &endp, 0); - if ((endp + 1) < (buf + count)) - goto out; - - port = zfcp_port_enqueue(adapter, wwpn, 0, 0); - if (!port) - goto out; - - retval = 0; - - zfcp_erp_port_reopen(port, 0, 91, NULL); - zfcp_erp_wait(port->adapter); - zfcp_port_put(port); - out: - up(&zfcp_data.config_sema); - return retval ? retval : (ssize_t) count; -} - -static DEVICE_ATTR(port_add, S_IWUSR, NULL, zfcp_sysfs_port_add_store); - -/** - * zfcp_sysfs_port_remove_store - remove a port from sysfs tree - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * @count: number of bytes in buffer - * - * Store function of the "port_remove" attribute of an adapter. - */ -static ssize_t -zfcp_sysfs_port_remove_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) -{ - struct zfcp_adapter *adapter; - struct zfcp_port *port; - wwn_t wwpn; - char *endp; - int retval = 0; - - down(&zfcp_data.config_sema); - - adapter = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) { - retval = -EBUSY; - goto out; - } - - wwpn = simple_strtoull(buf, &endp, 0); - if ((endp + 1) < (buf + count)) { - retval = -EINVAL; - goto out; - } - - write_lock_irq(&zfcp_data.config_lock); - port = zfcp_get_port_by_wwpn(adapter, wwpn); - if (port && (atomic_read(&port->refcount) == 0)) { - zfcp_port_get(port); - atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); - list_move(&port->list, &adapter->port_remove_lh); - } - else { - port = NULL; - } - write_unlock_irq(&zfcp_data.config_lock); - - if (!port) { - retval = -ENXIO; - goto out; - } - - zfcp_erp_port_shutdown(port, 0, 92, NULL); - zfcp_erp_wait(adapter); - zfcp_port_put(port); - zfcp_port_dequeue(port); - out: - up(&zfcp_data.config_sema); - return retval ? retval : (ssize_t) count; -} - -static DEVICE_ATTR(port_remove, S_IWUSR, NULL, zfcp_sysfs_port_remove_store); - -/** - * zfcp_sysfs_adapter_failed_store - failed state of adapter - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * @count: number of bytes in buffer - * - * Store function of the "failed" attribute of an adapter. - * If a "0" gets written to "failed", error recovery will be - * started for the belonging adapter. - */ -static ssize_t -zfcp_sysfs_adapter_failed_store(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct zfcp_adapter *adapter; - unsigned int val; - char *endp; - int retval = 0; - - down(&zfcp_data.config_sema); - - adapter = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) { - retval = -EBUSY; - goto out; - } - - val = simple_strtoul(buf, &endp, 0); - if (((endp + 1) < (buf + count)) || (val != 0)) { - retval = -EINVAL; - goto out; - } - - zfcp_erp_modify_adapter_status(adapter, 44, NULL, - ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET); - zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 93, - NULL); - zfcp_erp_wait(adapter); - out: - up(&zfcp_data.config_sema); - return retval ? retval : (ssize_t) count; -} - -/** - * zfcp_sysfs_adapter_failed_show - failed state of adapter - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * - * Show function of "failed" attribute of adapter. Will be - * "0" if adapter is working, otherwise "1". - */ -static ssize_t -zfcp_sysfs_adapter_failed_show(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct zfcp_adapter *adapter; - - adapter = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) - return sprintf(buf, "1\n"); - else - return sprintf(buf, "0\n"); -} - -static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_adapter_failed_show, - zfcp_sysfs_adapter_failed_store); - -static struct attribute *zfcp_adapter_attrs[] = { - &dev_attr_failed.attr, - &dev_attr_in_recovery.attr, - &dev_attr_port_remove.attr, - &dev_attr_port_add.attr, - &dev_attr_peer_wwnn.attr, - &dev_attr_peer_wwpn.attr, - &dev_attr_peer_d_id.attr, - &dev_attr_card_version.attr, - &dev_attr_lic_version.attr, - &dev_attr_status.attr, - &dev_attr_hardware_version.attr, - NULL -}; - -static struct attribute_group zfcp_adapter_attr_group = { - .attrs = zfcp_adapter_attrs, -}; - -/** - * zfcp_sysfs_create_adapter_files - create sysfs adapter files - * @dev: pointer to belonging device - * - * Create all attributes of the sysfs representation of an adapter. - */ -int -zfcp_sysfs_adapter_create_files(struct device *dev) -{ - return sysfs_create_group(&dev->kobj, &zfcp_adapter_attr_group); -} - -/** - * zfcp_sysfs_remove_adapter_files - remove sysfs adapter files - * @dev: pointer to belonging device - * - * Remove all attributes of the sysfs representation of an adapter. - */ -void -zfcp_sysfs_adapter_remove_files(struct device *dev) -{ - sysfs_remove_group(&dev->kobj, &zfcp_adapter_attr_group); -} - -#undef ZFCP_LOG_AREA diff --git a/drivers/s390/scsi/zfcp_sysfs_driver.c b/drivers/s390/scsi/zfcp_sysfs_driver.c deleted file mode 100644 index 651edd58906..00000000000 --- a/drivers/s390/scsi/zfcp_sysfs_driver.c +++ /dev/null @@ -1,106 +0,0 @@ -/* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. - * - * (C) Copyright IBM Corp. 2002, 2006 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include "zfcp_ext.h" - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG - -/** - * ZFCP_DEFINE_DRIVER_ATTR - define for all loglevels sysfs attributes - * @_name: name of attribute - * @_define: name of ZFCP loglevel define - * - * Generates store function for a sysfs loglevel attribute of zfcp driver. - */ -#define ZFCP_DEFINE_DRIVER_ATTR(_name, _define) \ -static ssize_t zfcp_sysfs_loglevel_##_name##_store(struct device_driver *drv, \ - const char *buf, \ - size_t count) \ -{ \ - unsigned int loglevel; \ - unsigned int new_loglevel; \ - char *endp; \ - \ - new_loglevel = simple_strtoul(buf, &endp, 0); \ - if ((endp + 1) < (buf + count)) \ - return -EINVAL; \ - if (new_loglevel > 3) \ - return -EINVAL; \ - down(&zfcp_data.config_sema); \ - loglevel = atomic_read(&zfcp_data.loglevel); \ - loglevel &= ~((unsigned int) 0xf << (ZFCP_LOG_AREA_##_define << 2)); \ - loglevel |= new_loglevel << (ZFCP_LOG_AREA_##_define << 2); \ - atomic_set(&zfcp_data.loglevel, loglevel); \ - up(&zfcp_data.config_sema); \ - return count; \ -} \ - \ -static ssize_t zfcp_sysfs_loglevel_##_name##_show(struct device_driver *dev, \ - char *buf) \ -{ \ - return sprintf(buf,"%d\n", (unsigned int) \ - ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA_##_define)); \ -} \ - \ -static DRIVER_ATTR(loglevel_##_name, S_IWUSR | S_IRUGO, \ - zfcp_sysfs_loglevel_##_name##_show, \ - zfcp_sysfs_loglevel_##_name##_store); - -ZFCP_DEFINE_DRIVER_ATTR(other, OTHER); -ZFCP_DEFINE_DRIVER_ATTR(scsi, SCSI); -ZFCP_DEFINE_DRIVER_ATTR(fsf, FSF); -ZFCP_DEFINE_DRIVER_ATTR(config, CONFIG); -ZFCP_DEFINE_DRIVER_ATTR(cio, CIO); -ZFCP_DEFINE_DRIVER_ATTR(qdio, QDIO); -ZFCP_DEFINE_DRIVER_ATTR(erp, ERP); -ZFCP_DEFINE_DRIVER_ATTR(fc, FC); - -static ssize_t zfcp_sysfs_version_show(struct device_driver *dev, - char *buf) -{ - return sprintf(buf, "%s\n", zfcp_data.driver_version); -} - -static DRIVER_ATTR(version, S_IRUGO, zfcp_sysfs_version_show, NULL); - -static struct attribute *zfcp_driver_attrs[] = { - &driver_attr_loglevel_other.attr, - &driver_attr_loglevel_scsi.attr, - &driver_attr_loglevel_fsf.attr, - &driver_attr_loglevel_config.attr, - &driver_attr_loglevel_cio.attr, - &driver_attr_loglevel_qdio.attr, - &driver_attr_loglevel_erp.attr, - &driver_attr_loglevel_fc.attr, - &driver_attr_version.attr, - NULL -}; - -static struct attribute_group zfcp_driver_attr_group = { - .attrs = zfcp_driver_attrs, -}; - -struct attribute_group *zfcp_driver_attr_groups[] = { - &zfcp_driver_attr_group, - NULL, -}; - -#undef ZFCP_LOG_AREA diff --git a/drivers/s390/scsi/zfcp_sysfs_port.c b/drivers/s390/scsi/zfcp_sysfs_port.c deleted file mode 100644 index 703c1b5cb60..00000000000 --- a/drivers/s390/scsi/zfcp_sysfs_port.c +++ /dev/null @@ -1,295 +0,0 @@ -/* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. - * - * (C) Copyright IBM Corp. 2002, 2006 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include "zfcp_ext.h" - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG - -/** - * zfcp_sysfs_port_release - gets called when a struct device port is released - * @dev: pointer to belonging device - */ -void -zfcp_sysfs_port_release(struct device *dev) -{ - kfree(dev); -} - -/** - * ZFCP_DEFINE_PORT_ATTR - * @_name: name of show attribute - * @_format: format string - * @_value: value to print - * - * Generates attributes for a port. - */ -#define ZFCP_DEFINE_PORT_ATTR(_name, _format, _value) \ -static ssize_t zfcp_sysfs_port_##_name##_show(struct device *dev, struct device_attribute *attr, \ - char *buf) \ -{ \ - struct zfcp_port *port; \ - \ - port = dev_get_drvdata(dev); \ - return sprintf(buf, _format, _value); \ -} \ - \ -static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_port_##_name##_show, NULL); - -ZFCP_DEFINE_PORT_ATTR(status, "0x%08x\n", atomic_read(&port->status)); -ZFCP_DEFINE_PORT_ATTR(in_recovery, "%d\n", atomic_test_mask - (ZFCP_STATUS_COMMON_ERP_INUSE, &port->status)); -ZFCP_DEFINE_PORT_ATTR(access_denied, "%d\n", atomic_test_mask - (ZFCP_STATUS_COMMON_ACCESS_DENIED, &port->status)); - -/** - * zfcp_sysfs_unit_add_store - add a unit to sysfs tree - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * @count: number of bytes in buffer - * - * Store function of the "unit_add" attribute of a port. - */ -static ssize_t -zfcp_sysfs_unit_add_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) -{ - fcp_lun_t fcp_lun; - char *endp; - struct zfcp_port *port; - struct zfcp_unit *unit; - int retval = -EINVAL; - - down(&zfcp_data.config_sema); - - port = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) { - retval = -EBUSY; - goto out; - } - - fcp_lun = simple_strtoull(buf, &endp, 0); - if ((endp + 1) < (buf + count)) - goto out; - - unit = zfcp_unit_enqueue(port, fcp_lun); - if (!unit) - goto out; - - retval = 0; - - zfcp_erp_unit_reopen(unit, 0, 94, NULL); - zfcp_erp_wait(unit->port->adapter); - zfcp_unit_put(unit); - out: - up(&zfcp_data.config_sema); - return retval ? retval : (ssize_t) count; -} - -static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store); - -/** - * zfcp_sysfs_unit_remove_store - remove a unit from sysfs tree - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * @count: number of bytes in buffer - */ -static ssize_t -zfcp_sysfs_unit_remove_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) -{ - struct zfcp_port *port; - struct zfcp_unit *unit; - fcp_lun_t fcp_lun; - char *endp; - int retval = 0; - - down(&zfcp_data.config_sema); - - port = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) { - retval = -EBUSY; - goto out; - } - - fcp_lun = simple_strtoull(buf, &endp, 0); - if ((endp + 1) < (buf + count)) { - retval = -EINVAL; - goto out; - } - - write_lock_irq(&zfcp_data.config_lock); - unit = zfcp_get_unit_by_lun(port, fcp_lun); - if (unit && (atomic_read(&unit->refcount) == 0)) { - zfcp_unit_get(unit); - atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); - list_move(&unit->list, &port->unit_remove_lh); - } - else { - unit = NULL; - } - write_unlock_irq(&zfcp_data.config_lock); - - if (!unit) { - retval = -ENXIO; - goto out; - } - - zfcp_erp_unit_shutdown(unit, 0, 95, NULL); - zfcp_erp_wait(unit->port->adapter); - zfcp_unit_put(unit); - zfcp_unit_dequeue(unit); - out: - up(&zfcp_data.config_sema); - return retval ? retval : (ssize_t) count; -} - -static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store); - -/** - * zfcp_sysfs_port_failed_store - failed state of port - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * @count: number of bytes in buffer - * - * Store function of the "failed" attribute of a port. - * If a "0" gets written to "failed", error recovery will be - * started for the belonging port. - */ -static ssize_t -zfcp_sysfs_port_failed_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) -{ - struct zfcp_port *port; - unsigned int val; - char *endp; - int retval = 0; - - down(&zfcp_data.config_sema); - - port = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) { - retval = -EBUSY; - goto out; - } - - val = simple_strtoul(buf, &endp, 0); - if (((endp + 1) < (buf + count)) || (val != 0)) { - retval = -EINVAL; - goto out; - } - - zfcp_erp_modify_port_status(port, 45, NULL, - ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET); - zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, 96, NULL); - zfcp_erp_wait(port->adapter); - out: - up(&zfcp_data.config_sema); - return retval ? retval : (ssize_t) count; -} - -/** - * zfcp_sysfs_port_failed_show - failed state of port - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * - * Show function of "failed" attribute of port. Will be - * "0" if port is working, otherwise "1". - */ -static ssize_t -zfcp_sysfs_port_failed_show(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct zfcp_port *port; - - port = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) - return sprintf(buf, "1\n"); - else - return sprintf(buf, "0\n"); -} - -static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_port_failed_show, - zfcp_sysfs_port_failed_store); - -/** - * zfcp_port_common_attrs - * sysfs attributes that are common for all kind of fc ports. - */ -static struct attribute *zfcp_port_common_attrs[] = { - &dev_attr_failed.attr, - &dev_attr_in_recovery.attr, - &dev_attr_status.attr, - &dev_attr_access_denied.attr, - NULL -}; - -static struct attribute_group zfcp_port_common_attr_group = { - .attrs = zfcp_port_common_attrs, -}; - -/** - * zfcp_port_no_ns_attrs - * sysfs attributes not to be used for nameserver ports. - */ -static struct attribute *zfcp_port_no_ns_attrs[] = { - &dev_attr_unit_add.attr, - &dev_attr_unit_remove.attr, - NULL -}; - -static struct attribute_group zfcp_port_no_ns_attr_group = { - .attrs = zfcp_port_no_ns_attrs, -}; - -/** - * zfcp_sysfs_port_create_files - create sysfs port files - * @dev: pointer to belonging device - * - * Create all attributes of the sysfs representation of a port. - */ -int -zfcp_sysfs_port_create_files(struct device *dev, u32 flags) -{ - int retval; - - retval = sysfs_create_group(&dev->kobj, &zfcp_port_common_attr_group); - - if ((flags & ZFCP_STATUS_PORT_WKA) || retval) - return retval; - - retval = sysfs_create_group(&dev->kobj, &zfcp_port_no_ns_attr_group); - if (retval) - sysfs_remove_group(&dev->kobj, &zfcp_port_common_attr_group); - - return retval; -} - -/** - * zfcp_sysfs_port_remove_files - remove sysfs port files - * @dev: pointer to belonging device - * - * Remove all attributes of the sysfs representation of a port. - */ -void -zfcp_sysfs_port_remove_files(struct device *dev, u32 flags) -{ - sysfs_remove_group(&dev->kobj, &zfcp_port_common_attr_group); - if (!(flags & ZFCP_STATUS_PORT_WKA)) - sysfs_remove_group(&dev->kobj, &zfcp_port_no_ns_attr_group); -} - -#undef ZFCP_LOG_AREA diff --git a/drivers/s390/scsi/zfcp_sysfs_unit.c b/drivers/s390/scsi/zfcp_sysfs_unit.c deleted file mode 100644 index 80fb2c2cf48..00000000000 --- a/drivers/s390/scsi/zfcp_sysfs_unit.c +++ /dev/null @@ -1,167 +0,0 @@ -/* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. - * - * (C) Copyright IBM Corp. 2002, 2006 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include "zfcp_ext.h" - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG - -/** - * zfcp_sysfs_unit_release - gets called when a struct device unit is released - * @dev: pointer to belonging device - */ -void -zfcp_sysfs_unit_release(struct device *dev) -{ - kfree(dev); -} - -/** - * ZFCP_DEFINE_UNIT_ATTR - * @_name: name of show attribute - * @_format: format string - * @_value: value to print - * - * Generates attribute for a unit. - */ -#define ZFCP_DEFINE_UNIT_ATTR(_name, _format, _value) \ -static ssize_t zfcp_sysfs_unit_##_name##_show(struct device *dev, struct device_attribute *attr, \ - char *buf) \ -{ \ - struct zfcp_unit *unit; \ - \ - unit = dev_get_drvdata(dev); \ - return sprintf(buf, _format, _value); \ -} \ - \ -static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_unit_##_name##_show, NULL); - -ZFCP_DEFINE_UNIT_ATTR(status, "0x%08x\n", atomic_read(&unit->status)); -ZFCP_DEFINE_UNIT_ATTR(in_recovery, "%d\n", atomic_test_mask - (ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status)); -ZFCP_DEFINE_UNIT_ATTR(access_denied, "%d\n", atomic_test_mask - (ZFCP_STATUS_COMMON_ACCESS_DENIED, &unit->status)); -ZFCP_DEFINE_UNIT_ATTR(access_shared, "%d\n", atomic_test_mask - (ZFCP_STATUS_UNIT_SHARED, &unit->status)); -ZFCP_DEFINE_UNIT_ATTR(access_readonly, "%d\n", atomic_test_mask - (ZFCP_STATUS_UNIT_READONLY, &unit->status)); - -/** - * zfcp_sysfs_unit_failed_store - failed state of unit - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * @count: number of bytes in buffer - * - * Store function of the "failed" attribute of a unit. - * If a "0" gets written to "failed", error recovery will be - * started for the belonging unit. - */ -static ssize_t -zfcp_sysfs_unit_failed_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) -{ - struct zfcp_unit *unit; - unsigned int val; - char *endp; - int retval = 0; - - down(&zfcp_data.config_sema); - unit = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status)) { - retval = -EBUSY; - goto out; - } - - val = simple_strtoul(buf, &endp, 0); - if (((endp + 1) < (buf + count)) || (val != 0)) { - retval = -EINVAL; - goto out; - } - - zfcp_erp_modify_unit_status(unit, 46, NULL, - ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET); - zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, 97, NULL); - zfcp_erp_wait(unit->port->adapter); - out: - up(&zfcp_data.config_sema); - return retval ? retval : (ssize_t) count; -} - -/** - * zfcp_sysfs_unit_failed_show - failed state of unit - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * - * Show function of "failed" attribute of unit. Will be - * "0" if unit is working, otherwise "1". - */ -static ssize_t -zfcp_sysfs_unit_failed_show(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct zfcp_unit *unit; - - unit = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status)) - return sprintf(buf, "1\n"); - else - return sprintf(buf, "0\n"); -} - -static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_unit_failed_show, - zfcp_sysfs_unit_failed_store); - -static struct attribute *zfcp_unit_attrs[] = { - &dev_attr_failed.attr, - &dev_attr_in_recovery.attr, - &dev_attr_status.attr, - &dev_attr_access_denied.attr, - &dev_attr_access_shared.attr, - &dev_attr_access_readonly.attr, - NULL -}; - -static struct attribute_group zfcp_unit_attr_group = { - .attrs = zfcp_unit_attrs, -}; - -/** - * zfcp_sysfs_create_unit_files - create sysfs unit files - * @dev: pointer to belonging device - * - * Create all attributes of the sysfs representation of a unit. - */ -int -zfcp_sysfs_unit_create_files(struct device *dev) -{ - return sysfs_create_group(&dev->kobj, &zfcp_unit_attr_group); -} - -/** - * zfcp_sysfs_remove_unit_files - remove sysfs unit files - * @dev: pointer to belonging device - * - * Remove all attributes of the sysfs representation of a unit. - */ -void -zfcp_sysfs_unit_remove_files(struct device *dev) -{ - sysfs_remove_group(&dev->kobj, &zfcp_unit_attr_group); -} - -#undef ZFCP_LOG_AREA |