diff options
| -rw-r--r-- | drivers/infiniband/core/Makefile | 5 | ||||
| -rw-r--r-- | drivers/infiniband/core/cm.c | 3324 | ||||
| -rw-r--r-- | drivers/infiniband/core/cm_msgs.h | 819 |
3 files changed, 4147 insertions, 1 deletions
diff --git a/drivers/infiniband/core/Makefile b/drivers/infiniband/core/Makefile index 96b8eba9584..216cb281abd 100644 --- a/drivers/infiniband/core/Makefile +++ b/drivers/infiniband/core/Makefile @@ -1,6 +1,7 @@ EXTRA_CFLAGS += -Idrivers/infiniband/include -obj-$(CONFIG_INFINIBAND) += ib_core.o ib_mad.o ib_sa.o ib_umad.o +obj-$(CONFIG_INFINIBAND) += ib_core.o ib_mad.o ib_sa.o \ + ib_cm.o ib_umad.o obj-$(CONFIG_INFINIBAND_USER_VERBS) += ib_uverbs.o ib_core-y := packer.o ud_header.o verbs.o sysfs.o \ @@ -10,6 +11,8 @@ ib_mad-y := mad.o smi.o agent.o mad_rmpp.o ib_sa-y := sa_query.o +ib_cm-y := cm.o + ib_umad-y := user_mad.o ib_uverbs-y := uverbs_main.o uverbs_cmd.o uverbs_mem.o diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c new file mode 100644 index 00000000000..403ed125d8f --- /dev/null +++ b/drivers/infiniband/core/cm.c @@ -0,0 +1,3324 @@ +/* + * Copyright (c) 2004, 2005 Intel Corporation. All rights reserved. + * Copyright (c) 2004 Topspin Corporation. All rights reserved. + * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved. + * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + * $Id: cm.c 2821 2005-07-08 17:07:28Z sean.hefty $ + */ +#include <linux/dma-mapping.h> +#include <linux/err.h> +#include <linux/idr.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/rbtree.h> +#include <linux/spinlock.h> +#include <linux/workqueue.h> + +#include <ib_cache.h> +#include <ib_cm.h> +#include "cm_msgs.h" + +MODULE_AUTHOR("Sean Hefty"); +MODULE_DESCRIPTION("InfiniBand CM"); +MODULE_LICENSE("Dual BSD/GPL"); + +static void cm_add_one(struct ib_device *device); +static void cm_remove_one(struct ib_device *device); + +static struct ib_client cm_client = { + .name = "cm", + .add = cm_add_one, + .remove = cm_remove_one +}; + +static struct ib_cm { + spinlock_t lock; + struct list_head device_list; + rwlock_t device_lock; + struct rb_root listen_service_table; + u64 listen_service_id; + /* struct rb_root peer_service_table; todo: fix peer to peer */ + struct rb_root remote_qp_table; + struct rb_root remote_id_table; + struct rb_root remote_sidr_table; + struct idr local_id_table; + struct workqueue_struct *wq; +} cm; + +struct cm_port { + struct cm_device *cm_dev; + struct ib_mad_agent *mad_agent; + u8 port_num; +}; + +struct cm_device { + struct list_head list; + struct ib_device *device; + u64 ca_guid; + struct cm_port port[0]; +}; + +struct cm_av { + struct cm_port *port; + union ib_gid dgid; + struct ib_ah_attr ah_attr; + u16 pkey_index; + u8 packet_life_time; +}; + +struct cm_work { + struct work_struct work; + struct list_head list; + struct cm_port *port; + struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */ + u32 local_id; /* Established / timewait */ + u32 remote_id; + struct ib_cm_event cm_event; + struct ib_sa_path_rec path[0]; +}; + +struct cm_timewait_info { + struct cm_work work; /* Must be first. */ + struct rb_node remote_qp_node; + struct rb_node remote_id_node; + u64 remote_ca_guid; + u32 remote_qpn; + u8 inserted_remote_qp; + u8 inserted_remote_id; +}; + +struct cm_id_private { + struct ib_cm_id id; + + struct rb_node service_node; + struct rb_node sidr_id_node; + spinlock_t lock; + wait_queue_head_t wait; + atomic_t refcount; + + struct ib_mad_send_buf *msg; + struct cm_timewait_info *timewait_info; + /* todo: use alternate port on send failure */ + struct cm_av av; + struct cm_av alt_av; + + void *private_data; + u64 tid; + u32 local_qpn; + u32 remote_qpn; + u32 sq_psn; + u32 rq_psn; + int timeout_ms; + enum ib_mtu path_mtu; + u8 private_data_len; + u8 max_cm_retries; + u8 peer_to_peer; + u8 responder_resources; + u8 initiator_depth; + u8 local_ack_timeout; + u8 retry_count; + u8 rnr_retry_count; + u8 service_timeout; + + struct list_head work_list; + atomic_t work_count; +}; + +static void cm_work_handler(void *data); + +static inline void cm_deref_id(struct cm_id_private *cm_id_priv) +{ + if (atomic_dec_and_test(&cm_id_priv->refcount)) + wake_up(&cm_id_priv->wait); +} + +static int cm_alloc_msg(struct cm_id_private *cm_id_priv, + struct ib_mad_send_buf **msg) +{ + struct ib_mad_agent *mad_agent; + struct ib_mad_send_buf *m; + struct ib_ah *ah; + + mad_agent = cm_id_priv->av.port->mad_agent; + ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr); + if (IS_ERR(ah)) + return PTR_ERR(ah); + + m = ib_create_send_mad(mad_agent, 1, cm_id_priv->av.pkey_index, + ah, 0, sizeof(struct ib_mad_hdr), + sizeof(struct ib_mad)-sizeof(struct ib_mad_hdr), + GFP_ATOMIC); + if (IS_ERR(m)) { + ib_destroy_ah(ah); + return PTR_ERR(m); + } + + /* Timeout set by caller if response is expected. */ + m->send_wr.wr.ud.retries = cm_id_priv->max_cm_retries; + + atomic_inc(&cm_id_priv->refcount); + m->context[0] = cm_id_priv; + *msg = m; + return 0; +} + +static int cm_alloc_response_msg(struct cm_port *port, + struct ib_mad_recv_wc *mad_recv_wc, + struct ib_mad_send_buf **msg) +{ + struct ib_mad_send_buf *m; + struct ib_ah *ah; + + ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, + mad_recv_wc->recv_buf.grh, port->port_num); + if (IS_ERR(ah)) + return PTR_ERR(ah); + + m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, + ah, 0, sizeof(struct ib_mad_hdr), + sizeof(struct ib_mad)-sizeof(struct ib_mad_hdr), + GFP_ATOMIC); + if (IS_ERR(m)) { + ib_destroy_ah(ah); + return PTR_ERR(m); + } + *msg = m; + return 0; +} + +static void cm_free_msg(struct ib_mad_send_buf *msg) +{ + ib_destroy_ah(msg->send_wr.wr.ud.ah); + if (msg->context[0]) + cm_deref_id(msg->context[0]); + ib_free_send_mad(msg); +} + +static void * cm_copy_private_data(const void *private_data, + u8 private_data_len) +{ + void *data; + + if (!private_data || !private_data_len) + return NULL; + + data = kmalloc(private_data_len, GFP_KERNEL); + if (!data) + return ERR_PTR(-ENOMEM); + + memcpy(data, private_data, private_data_len); + return data; +} + +static void cm_set_private_data(struct cm_id_private *cm_id_priv, + void *private_data, u8 private_data_len) +{ + if (cm_id_priv->private_data && cm_id_priv->private_data_len) + kfree(cm_id_priv->private_data); + + cm_id_priv->private_data = private_data; + cm_id_priv->private_data_len = private_data_len; +} + +static void cm_set_ah_attr(struct ib_ah_attr *ah_attr, u8 port_num, + u16 dlid, u8 sl, u16 src_path_bits) +{ + memset(ah_attr, 0, sizeof ah_attr); + ah_attr->dlid = be16_to_cpu(dlid); + ah_attr->sl = sl; + ah_attr->src_path_bits = src_path_bits; + ah_attr->port_num = port_num; +} + +static void cm_init_av_for_response(struct cm_port *port, + struct ib_wc *wc, struct cm_av *av) +{ + av->port = port; + av->pkey_index = wc->pkey_index; + cm_set_ah_attr(&av->ah_attr, port->port_num, cpu_to_be16(wc->slid), + wc->sl, wc->dlid_path_bits); +} + +static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) +{ + struct cm_device *cm_dev; + struct cm_port *port = NULL; + unsigned long flags; + int ret; + u8 p; + + read_lock_irqsave(&cm.device_lock, flags); + list_for_each_entry(cm_dev, &cm.device_list, list) { + if (!ib_find_cached_gid(cm_dev->device, &path->sgid, + &p, NULL)) { + port = &cm_dev->port[p-1]; + break; + } + } + read_unlock_irqrestore(&cm.device_lock, flags); + + if (!port) + return -EINVAL; + + ret = ib_find_cached_pkey(cm_dev->device, port->port_num, + be16_to_cpu(path->pkey), &av->pkey_index); + if (ret) + return ret; + + av->port = port; + cm_set_ah_attr(&av->ah_attr, av->port->port_num, path->dlid, + path->sl, path->slid & 0x7F); + av->packet_life_time = path->packet_life_time; + return 0; +} + +static int cm_alloc_id(struct cm_id_private *cm_id_priv) +{ + unsigned long flags; + int ret; + + do { + spin_lock_irqsave(&cm.lock, flags); + ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, 1, + (int *) &cm_id_priv->id.local_id); + spin_unlock_irqrestore(&cm.lock, flags); + } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) ); + return ret; +} + +static void cm_free_id(u32 local_id) +{ + unsigned long flags; + + spin_lock_irqsave(&cm.lock, flags); + idr_remove(&cm.local_id_table, (int) local_id); + spin_unlock_irqrestore(&cm.lock, flags); +} + +static struct cm_id_private * cm_get_id(u32 local_id, u32 remote_id) +{ + struct cm_id_private *cm_id_priv; + + cm_id_priv = idr_find(&cm.local_id_table, (int) local_id); + if (cm_id_priv) { + if (cm_id_priv->id.remote_id == remote_id) + atomic_inc(&cm_id_priv->refcount); + else + cm_id_priv = NULL; + } + + return cm_id_priv; +} + +static struct cm_id_private * cm_acquire_id(u32 local_id, u32 remote_id) +{ + struct cm_id_private *cm_id_priv; + unsigned long flags; + + spin_lock_irqsave(&cm.lock, flags); + cm_id_priv = cm_get_id(local_id, remote_id); + spin_unlock_irqrestore(&cm.lock, flags); + + return cm_id_priv; +} + +static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) +{ + struct rb_node **link = &cm.listen_service_table.rb_node; + struct rb_node *parent = NULL; + struct cm_id_private *cur_cm_id_priv; + u64 service_id = cm_id_priv->id.service_id; + u64 service_mask = cm_id_priv->id.service_mask; + + while (*link) { + parent = *link; + cur_cm_id_priv = rb_entry(parent, struct cm_id_private, + service_node); + if ((cur_cm_id_priv->id.service_mask & service_id) == + (service_mask & cur_cm_id_priv->id.service_id)) + return cm_id_priv; + if (service_id < cur_cm_id_priv->id.service_id) + link = &(*link)->rb_left; + else + link = &(*link)->rb_right; + } + rb_link_node(&cm_id_priv->service_node, parent, link); + rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); + return NULL; +} + +static struct cm_id_private * cm_find_listen(u64 service_id) +{ + struct rb_node *node = cm.listen_service_table.rb_node; + struct cm_id_private *cm_id_priv; + + while (node) { + cm_id_priv = rb_entry(node, struct cm_id_private, service_node); + if ((cm_id_priv->id.service_mask & service_id) == + (cm_id_priv->id.service_mask & cm_id_priv->id.service_id)) + return cm_id_priv; + if (service_id < cm_id_priv->id.service_id) + node = node->rb_left; + else + node = node->rb_right; + } + return NULL; +} + +static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info + *timewait_info) +{ + struct rb_node **link = &cm.remote_id_table.rb_node; + struct rb_node *parent = NULL; + struct cm_timewait_info *cur_timewait_info; + u64 remote_ca_guid = timewait_info->remote_ca_guid; + u32 remote_id = timewait_info->work.remote_id; + + while (*link) { + parent = *link; + cur_timewait_info = rb_entry(parent, struct cm_timewait_info, + remote_id_node); + if (remote_id < cur_timewait_info->work.remote_id) + link = &(*link)->rb_left; + else if (remote_id > cur_timewait_info->work.remote_id) + link = &(*link)->rb_right; + else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) + link = &(*link)->rb_left; + else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) + link = &(*link)->rb_right; + else + return cur_timewait_info; + } + timewait_info->inserted_remote_id = 1; + rb_link_node(&timewait_info->remote_id_node, parent, link); + rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); + return NULL; +} + +static struct cm_timewait_info * cm_find_remote_id(u64 remote_ca_guid, + u32 remote_id) +{ + struct rb_node *node = cm.remote_id_table.rb_node; + struct cm_timewait_info *timewait_info; + + while (node) { + timewait_info = rb_entry(node, struct cm_timewait_info, + remote_id_node); + if (remote_id < timewait_info->work.remote_id) + node = node->rb_left; + else if (remote_id > timewait_info->work.remote_id) + node = node->rb_right; + else if (remote_ca_guid < timewait_info->remote_ca_guid) + node = node->rb_left; + else if (remote_ca_guid > timewait_info->remote_ca_guid) + node = node->rb_right; + else + return timewait_info; + } + return NULL; +} + +static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info + *timewait_info) +{ + struct rb_node **link = &cm.remote_qp_table.rb_node; + struct rb_node *parent = NULL; + struct cm_timewait_info *cur_timewait_info; + u64 remote_ca_guid = timewait_info->remote_ca_guid; + u32 remote_qpn = timewait_info->remote_qpn; + + while (*link) { + parent = *link; + cur_timewait_info = rb_entry(parent, struct cm_timewait_info, + remote_qp_node); + if (remote_qpn < cur_timewait_info->remote_qpn) + link = &(*link)->rb_left; + else if (remote_qpn > cur_timewait_info->remote_qpn) + link = &(*link)->rb_right; + else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) + link = &(*link)->rb_left; + else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) + link = &(*link)->rb_right; + else + return cur_timewait_info; + } + timewait_info->inserted_remote_qp = 1; + rb_link_node(&timewait_info->remote_qp_node, parent, link); + rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); + return NULL; +} + +static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private + *cm_id_priv) +{ + struct rb_node **link = &cm.remote_sidr_table.rb_node; + struct rb_node *parent = NULL; + struct cm_id_private *cur_cm_id_priv; + union ib_gid *port_gid = &cm_id_priv->av.dgid; + u32 remote_id = cm_id_priv->id.remote_id; + + while (*link) { + parent = *link; + cur_cm_id_priv = rb_entry(parent, struct cm_id_private, + sidr_id_node); + if (remote_id < cur_cm_id_priv->id.remote_id) + link = &(*link)->rb_left; + else if (remote_id > cur_cm_id_priv->id.remote_id) + link = &(*link)->rb_right; + else { + int cmp; + cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, + sizeof *port_gid); + if (cmp < 0) + link = &(*link)->rb_left; + else if (cmp > 0) + link = &(*link)->rb_right; + else + return cur_cm_id_priv; + } + } + rb_link_node(&cm_id_priv->sidr_id_node, parent, link); + rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); + return NULL; +} + +static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, + enum ib_cm_sidr_status status) +{ + struct ib_cm_sidr_rep_param param; + + memset(¶m, 0, sizeof param); + param.status = status; + ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); +} + +struct ib_cm_id *ib_create_cm_id(ib_cm_handler cm_handler, + void *context) +{ + struct cm_id_private *cm_id_priv; + int ret; + + cm_id_priv = kmalloc(sizeof *cm_id_priv, GFP_KERNEL); + if (!cm_id_priv) + return ERR_PTR(-ENOMEM); + + memset(cm_id_priv, 0, sizeof *cm_id_priv); + cm_id_priv->id.state = IB_CM_IDLE; + cm_id_priv->id.cm_handler = cm_handler; + cm_id_priv->id.context = context; + ret = cm_alloc_id(cm_id_priv); + if (ret) + goto error; + + spin_lock_init(&cm_id_priv->lock); + init_waitqueue_head(&cm_id_priv->wait); + INIT_LIST_HEAD(&cm_id_priv->work_list); + atomic_set(&cm_id_priv->work_count, -1); + atomic_set(&cm_id_priv->refcount, 1); + return &cm_id_priv->id; + +error: + kfree(cm_id_priv); + return ERR_PTR(-ENOMEM); +} +EXPORT_SYMBOL(ib_create_cm_id); + +static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) +{ + struct cm_work *work; + + if (list_empty(&cm_id_priv->work_list)) + return NULL; + + work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); + list_del(&work->list); + return work; +} + +static void cm_free_work(struct cm_work *work) +{ + if (work->mad_recv_wc) + ib_free_recv_mad(work->mad_recv_wc); + kfree(work); +} + +static inline int cm_convert_to_ms(int iba_time) +{ + /* approximate conversion to ms from 4.096us x 2^iba_time */ + return 1 << max(iba_time - 8, 0); +} + +static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) +{ + unsigned long flags; + + if (!timewait_info->inserted_remote_id && + !timewait_info->inserted_remote_qp) + return; + + spin_lock_irqsave(&cm.lock, flags); + if (timewait_info->inserted_remote_id) { + rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); + timewait_info->inserted_remote_id = 0; + } + + if (timewait_info->inserted_remote_qp) { + rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); + timewait_info->inserted_remote_qp = 0; + } + spin_unlock_irqrestore(&cm.lock, flags); +} + +static struct cm_timewait_info * cm_create_timewait_info(u32 local_id) +{ + struct cm_timewait_info *timewait_info; + + timewait_info = kmalloc(sizeof *timewait_info, GFP_KERNEL); + if (!timewait_info) + return ERR_PTR(-ENOMEM); + memset(timewait_info, 0, sizeof *timewait_info); + + timewait_info->work.local_id = local_id; + INIT_WORK(&timewait_info->work.work, cm_work_handler, + &timewait_info->work); + timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; + return timewait_info; +} + +static void cm_enter_timewait(struct cm_id_private *cm_id_priv) +{ + int wait_time; + + /* + * The cm_id could be destroyed by the user before we exit timewait. + * To protect against this, we search for the cm_id after exiting + * timewait before notifying the user that we've exited timewait. + */ + cm_id_priv->id.state = IB_CM_TIMEWAIT; + wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout); + queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, + msecs_to_jiffies(wait_time)); + cm_id_priv->timewait_info = NULL; +} + +static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) +{ + cm_id_priv->id.state = IB_CM_IDLE; + if (cm_id_priv->timewait_info) { + cm_cleanup_timewait(cm_id_priv->timewait_info); + kfree(cm_id_priv->timewait_info); + cm_id_priv->timewait_info = NULL; + } +} + +void ib_destroy_cm_id(struct ib_cm_id *cm_id) +{ + struct cm_id_private *cm_id_priv; + struct cm_work *work; + unsigned long flags; + + cm_id_priv = container_of(cm_id, struct cm_id_private, id); +retest: + spin_lock_irqsave(&cm_id_priv->lock, flags); + switch (cm_id->state) { + case IB_CM_LISTEN: + cm_id->state = IB_CM_IDLE; + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + spin_lock_irqsave(&cm.lock, flags); + rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); + spin_unlock_irqrestore(&cm.lock, flags); + break; + case IB_CM_SIDR_REQ_SENT: + cm_id->state = IB_CM_IDLE; + ib_cancel_mad(cm_id_priv->av.port->mad_agent, + (unsigned long) cm_id_priv->msg); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + break; + case IB_CM_SIDR_REQ_RCVD: + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); + break; + case IB_CM_REQ_SENT: + case IB_CM_MRA_REQ_RCVD: + case IB_CM_REP_SENT: + case IB_CM_MRA_REP_RCVD: + ib_cancel_mad(cm_id_priv->av.port->mad_agent, + (unsigned long) cm_id_priv->msg); + /* Fall through */ + case IB_CM_REQ_RCVD: + case IB_CM_MRA_REQ_SENT: + case IB_CM_REP_RCVD: + case IB_CM_MRA_REP_SENT: + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, + &cm_id_priv->av.port->cm_dev->ca_guid, + sizeof cm_id_priv->av.port->cm_dev->ca_guid, + NULL, 0); + break; + case IB_CM_ESTABLISHED: + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + ib_send_cm_dreq(cm_id, NULL, 0); + goto retest; + case IB_CM_DREQ_SENT: + ib_cancel_mad(cm_id_priv->av.port->mad_agent, + (unsigned long) cm_id_priv->msg); + cm_enter_timewait(cm_id_priv); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + break; + case IB_CM_DREQ_RCVD: + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + ib_send_cm_drep(cm_id, NULL, 0); + break; + default: + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + break; + } + + cm_free_id(cm_id->local_id); + atomic_dec(&cm_id_priv->refcount); + wait_event(cm_id_priv->wait, !atomic_read(&cm_id_priv->refcount)); + while ((work = cm_dequeue_work(cm_id_priv)) != NULL) + cm_free_work(work); + if (cm_id_priv->private_data && cm_id_priv->private_data_len) + kfree(cm_id_priv->private_data); + kfree(cm_id_priv); +} +EXPORT_SYMBOL(ib_destroy_cm_id); + +int ib_cm_listen(struct ib_cm_id *cm_id, + u64 service_id, + u64 service_mask) +{ + struct cm_id_private *cm_id_priv, *cur_cm_id_priv; + unsigned long flags; + int ret = 0; + + service_mask = service_mask ? service_mask : ~0ULL; + service_id &= service_mask; + if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && + (service_id != IB_CM_ASSIGN_SERVICE_ID)) + return -EINVAL; + + cm_id_priv = container_of(cm_id, struct cm_id_private, id); + BUG_ON(cm_id->state != IB_CM_IDLE); + + cm_id->state = IB_CM_LISTEN; + + spin_lock_irqsave(&cm.lock, flags); + if (service_id == IB_CM_ASSIGN_SERVICE_ID) { + cm_id->service_id = __cpu_to_be64(cm.listen_service_id++); + cm_id->service_mask = ~0ULL; + } else { + cm_id->service_id = service_id; + cm_id->service_mask = service_mask; + } + cur_cm_id_priv = cm_insert_listen(cm_id_priv); + spin_unlock_irqrestore(&cm.lock, flags); + + if (cur_cm_id_priv) { + cm_id->state = IB_CM_IDLE; + ret = -EBUSY; + } + return ret; +} +EXPORT_SYMBOL(ib_cm_listen); + +static u64 cm_form_tid(struct cm_id_private *cm_id_priv, + enum cm_msg_sequence msg_seq) +{ + u64 hi_tid, low_tid; + + hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; + low_tid = (u64) (cm_id_priv->id.local_id | (msg_seq << 30)); + return cpu_to_be64(hi_tid | low_tid); +} + +static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, + enum cm_msg_attr_id attr_id, u64 tid) +{ + hdr->base_version = IB_MGMT_BASE_VERSION; + hdr->mgmt_class = IB_MGMT_CLASS_CM; + hdr->class_version = IB_CM_CLASS_VERSION; + hdr->method = IB_MGMT_METHOD_SEND; + hdr->attr_id = attr_id; + hdr->tid = tid; +} + +static void cm_format_req(struct cm_req_msg *req_msg, + struct cm_id_private *cm_id_priv, + struct ib_cm_req_param *param) +{ + cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, + cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); + + req_msg->local_comm_id = cm_id_priv->id.local_id; + req_msg->service_id = param->service_id; + req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid; + cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); + cm_req_set_resp_res(req_msg, param->responder_resources); + cm_req_set_init_depth(req_msg, param->initiator_depth); + cm_req_set_remote_resp_timeout(req_msg, + param->remote_cm_response_timeout); + cm_req_set_qp_type(req_msg, param->qp_type); + cm_req_set_flow_ctrl(req_msg, param->flow_control); + cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); + cm_req_set_local_resp_timeout(req_msg, + param->local_cm_response_timeout); + cm_req_set_retry_count(req_msg, param->retry_count); + req_msg->pkey = param->primary_path->pkey; + cm_req_set_path_mtu(req_msg, param->primary_path->mtu); + cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); + cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); + cm_req_set_srq(req_msg, param->srq); + + req_msg->primary_local_lid = param->primary_path->slid; + req_msg->primary_remote_lid = param->primary_path->dlid; + req_msg->primary_local_gid = param->primary_path->sgid; + req_msg->primary_remote_gid = param->primary_path->dgid; + cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label); + cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate); + req_msg->primary_traffic_class = param->primary_path->traffic_class; + req_msg->primary_hop_limit = param->primary_path->hop_limit; + cm_req_set_primary_sl(req_msg, param->primary_path->sl); + cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */ + cm_req_set_primary_local_ack_timeout(req_msg, + min(31, param->primary_path->packet_life_time + 1)); + + if (param->alternate_path) { + req_msg->alt_local_lid = param->alternate_path->slid; + req_msg->alt_remote_lid = param->alternate_path->dlid; + req_msg->alt_local_gid = param->alternate_path->sgid; + req_msg->alt_remote_gid = param->alternate_path->dgid; + cm_req_set_alt_flow_label(req_msg, + param->alternate_path->flow_label); + cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate); + req_msg->alt_traffic_class = param->alternate_path->traffic_class; + req_msg->alt_hop_limit = param->alternate_path->hop_limit; + cm_req_set_alt_sl(req_msg, param->alternate_path->sl); + cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */ + cm_req_set_alt_local_ack_timeout(req_msg, + min(31, param->alternate_path->packet_life_time + 1)); + } + + if (param->private_data && param->private_data_len) + memcpy(req_msg->private_data, param->private_data, + param->private_data_len); +} + +static inline int cm_validate_req_param(struct ib_cm_req_param *param) +{ + /* peer-to-peer not supported */ + if (param->peer_to_peer) + return -EINVAL; + + if (!param->primary_path) + return -EINVAL; + + if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC) + return -EINVAL; + + if (param->private_data && + param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) + return -EINVAL; + + if (param->alternate_path && + (param->alternate_path->pkey != param->primary_path->pkey || + param->alternate_path->mtu != param->primary_path->mtu)) + return -EINVAL; + + return 0; +} + +int ib_send_cm_req(struct ib_cm_id *cm_id, + struct ib_cm_req_param *param) +{ + struct cm_id_private *cm_id_priv; + struct ib_send_wr *bad_send_wr; + struct cm_req_msg *req_msg; + unsigned long flags; + int ret; + + ret = cm_validate_req_param(param); + if (ret) + return ret; + + /* Verify that we're not in timewait. */ + cm_id_priv = container_of(cm_id, struct cm_id_private, id); + spin_lock_irqsave(&cm_id_priv->lock, flags); + if (cm_id->state != IB_CM_IDLE) { + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + ret = -EINVAL; + goto out; + } + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + + cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> + id.local_id); + if (IS_ERR(cm_id_priv->timewait_info)) + goto out; + + ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); + if (ret) + goto error1; + if (param->alternate_path) { + ret = cm_init_av_by_path(param->alternate_path, + &cm_id_priv->alt_av); + if (ret) + goto error1; + } + cm_id->service_id = param->service_id; + cm_id->service_mask = ~0ULL; + cm_id_priv->timeout_ms = cm_convert_to_ms( + param->primary_path->packet_life_time) * 2 + + cm_convert_to_ms( + param->remote_cm_response_timeout); + cm_id_priv->max_cm_retries = param->max_cm_retries; + cm_id_priv->initiator_depth = param->initiator_depth; + cm_id_priv->responder_resources = param->responder_resources; + cm_id_priv->retry_count = param->retry_count; + cm_id_priv->path_mtu = param->primary_path->mtu; + + ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); + if (ret) + goto error1; + + req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; + cm_format_req(req_msg, cm_id_priv, param); + cm_id_priv->tid = req_msg->hdr.tid; + cm_id_priv->msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms; + cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; + + cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); + cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); + cm_id_priv->local_ack_timeout = + cm_req_get_primary_local_ack_timeout(req_msg); + + spin_lock_irqsave(&cm_id_priv->lock, flags); + ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, + &cm_id_priv->msg->send_wr, &bad_send_wr); + if (ret) { + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + goto error2; + } + BUG_ON(cm_id->state != IB_CM_IDLE); + cm_id->state = IB_CM_REQ_SENT; + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + return 0; + +error2: cm_free_msg(cm_id_priv->msg); +error1: kfree(cm_id_priv->timewait_info); +out: return ret; +} +EXPORT_SYMBOL(ib_send_cm_req); + +static int cm_issue_rej(struct cm_port *port, + struct ib_mad_recv_wc *mad_recv_wc, + enum ib_cm_rej_reason reason, + enum cm_msg_response msg_rejected, + void *ari, u8 ari_length) +{ + struct ib_mad_send_buf *msg = NULL; + struct ib_send_wr *bad_send_wr; + struct cm_rej_msg *rej_msg, *rcv_msg; + int ret; + + ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); + if (ret) + return ret; + + /* We just need common CM header information. Cast to any message. */ + rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; + rej_msg = (struct cm_rej_msg *) msg->mad; + + cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); + rej_msg->remote_comm_id = rcv_msg->local_comm_id; + rej_msg->local_comm_id = rcv_msg->remote_comm_id; + cm_rej_set_msg_rejected(rej_msg, msg_rejected); + rej_msg->reason = reason; + + if (ari && ari_length) { + cm_rej_set_reject_info_len(rej_msg, ari_length); + memcpy(rej_msg->ari, ari, ari_length); + } + + ret = ib_post_send_mad(port->mad_agent, &msg->send_wr, &bad_send_wr); + if (ret) + cm_free_msg(msg); + + return ret; +} + +static inline int cm_is_active_peer(u64 local_ca_guid, u64 remote_ca_guid, + u32 local_qpn, u32 remote_qpn) +{ + return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || + ((local_ca_guid == remote_ca_guid) && + (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); +} + +static inline void cm_format_paths_from_req(struct cm_req_msg *req_msg, + struct ib_sa_path_rec *primary_path, + struct ib_sa_path_rec *alt_path) +{ + memset(primary_path, 0, sizeof *primary_path); + primary_path->dgid = req_msg->primary_local_gid; + primary_path->sgid = req_msg->primary_remote_gid; + primary_path->dlid = req_msg->primary_local_lid; + primary_path->slid = req_msg->primary_remote_lid; + primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); + primary_path->hop_limit = req_msg->primary_hop_limit; + primary_path->traffic_class = req_msg->primary_traffic_class; + primary_path->reversible = 1; + primary_path->pkey = req_msg->pkey; + primary_path->sl = cm_req_get_primary_sl(req_msg); + primary_path->mtu_selector = IB_SA_EQ; + primary_path->mtu = cm_req_get_path_mtu(req_msg); + primary_path->rate_selector = IB_SA_EQ; + primary_path->rate = cm_req_get_primary_packet_rate(req_msg); + primary_path->packet_life_time_selector = IB_SA_EQ; + primary_path->packet_life_time = + cm_req_get_primary_local_ack_timeout(req_msg); + primary_path->packet_life_time -= (primary_path->packet_life_time > 0); + + if (req_msg->alt_local_lid) { + memset(alt_path, 0, sizeof *alt_path); + alt_path->dgid = req_msg->alt_local_gid; + alt_path->sgid = req_msg->alt_remote_gid; + alt_path->dlid = req_msg->alt_local_lid; + alt_path->slid = req_msg->alt_remote_lid; + alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); + alt_path->hop_limit = req_msg->alt_hop_limit; + alt_path->traffic_class = req_msg->alt_traffic_class; + alt_path->reversible = 1; + alt_path->pkey = req_msg->pkey; + alt_path->sl = cm_req_get_alt_sl(req_msg); + alt_path->mtu_selector = IB_SA_EQ; + alt_path->mtu = cm_req_get_path_mtu(req_msg); + alt_path->rate_selector = IB_SA_EQ; + alt_path->rate = cm_req_get_alt_packet_rate(req_msg); + alt_path->packet_life_time_selector = IB_SA_EQ; + alt_path->packet_life_time = + cm_req_get_alt_local_ack_timeout(req_msg); + alt_path->packet_life_time -= (alt_path->packet_life_time > 0); + } +} + +static void cm_format_req_event(struct cm_work *work, + struct cm_id_private *cm_id_priv, + struct ib_cm_id *listen_id) +{ + struct cm_req_msg *req_msg; + struct ib_cm_req_event_param *param; + + req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; + param = &work->cm_event.param.req_rcvd; + param->listen_id = listen_id; + param->device = cm_id_priv->av.port->mad_agent->device; + param->port = cm_id_priv->av.port->port_num; + param->primary_path = &work->path[0]; + if (req_msg->alt_local_lid) + param->alternate_path = &work->path[1]; + else + param->alternate_path = NULL; + param->remote_ca_guid = req_msg->local_ca_guid; + param->remote_qkey = be32_to_cpu(req_msg->local_qkey); + param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); + param->qp_type = cm_req_get_qp_type(req_msg); + param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); + param->responder_resources = cm_req_get_init_depth(req_msg); + param->initiator_depth = cm_req_get_resp_res(req_msg); + param->local_cm_response_timeout = + cm_req_get_remote_resp_timeout(req_msg); + param->flow_control = cm_req_get_flow_ctrl(req_msg); + param->remote_cm_response_timeout = + cm_req_get_local_resp_timeout(req_msg); + param->retry_count = cm_req_get_retry_count(req_msg); + param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); + param->srq = cm_req_get_srq(req_msg); + work->cm_event.private_data = &req_msg->private_data; +} + +static void cm_process_work(struct cm_id_private *cm_id_priv, + struct cm_work *work) +{ + unsigned long flags; + int ret; + + /* We will typically only have the current event to report. */ + ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); + cm_free_work(work); + + while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { + spin_lock_irqsave(&cm_id_priv->lock, flags); + work = cm_dequeue_work(cm_id_priv); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + BUG_ON(!work); + ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, + &work->cm_event); + cm_free_work(work); + } + cm_deref_id(cm_id_priv); + if (ret) + ib_destroy_cm_id(&cm_id_priv->id); +} + +static void cm_format_mra(struct cm_mra_msg *mra_msg, + struct cm_id_private *cm_id_priv, + enum cm_msg_response msg_mraed, u8 service_timeout, + const void *private_data, u8 private_data_len) +{ + cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); + cm_mra_set_msg_mraed(mra_msg, msg_mraed); + mra_msg->local_comm_id = cm_id_priv->id.local_id; + mra_msg->remote_comm_id = cm_id_priv->id.remote_id; + cm_mra_set_service_timeout(mra_msg, service_timeout); + + if (private_data && private_data_len) + memcpy(mra_msg->private_data, private_data, private_data_len); +} + +static void cm_format_rej(struct cm_rej_msg *rej_msg, + struct cm_id_private *cm_id_priv, + enum ib_cm_rej_reason reason, + void *ari, + u8 ari_length, + const void *private_data, + u8 private_data_len) +{ + cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); + rej_msg->remote_comm_id = cm_id_priv->id.remote_id; + + switch(cm_id_priv->id.state) { + case IB_CM_REQ_RCVD: + rej_msg->local_comm_id = 0; + cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); + break; + case IB_CM_MRA_REQ_SENT: + rej_msg->local_comm_id = cm_id_priv->id.local_id; + cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); + break; + case IB_CM_REP_RCVD: + case IB_CM_MRA_REP_SENT: + rej_msg->local_comm_id = cm_id_priv->id.local_id; + cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); + break; + default: + rej_msg->local_comm_id = cm_id_priv->id.local_id; + cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); + break; + } + + rej_msg->reason = reason; + if (ari && ari_length) { + cm_rej_set_reject_info_len(rej_msg, ari_length); + memcpy(rej_msg->ari, ari, ari_length); + } + + if (private_data && private_data_len) + memcpy(rej_msg->private_data, private_data, private_data_len); +} + +static void cm_dup_req_handler(struct cm_work *work, + struct cm_id_private *cm_id_priv) +{ + struct ib_mad_send_buf *msg = NULL; + struct ib_send_wr *bad_send_wr; + unsigned long flags; + int ret; + + /* Quick state check to discard duplicate REQs. */ + if (cm_id_priv->id.state == IB_CM_REQ_RCVD) + return; + + ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); + if (ret) + return; + + spin_lock_irqsave(&cm_id_priv->lock, flags); + switch (cm_id_priv->id.state) { + case IB_CM_MRA_REQ_SENT: + cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, + CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, + cm_id_priv->private_data, + cm_id_priv->private_data_len); + break; + case IB_CM_TIMEWAIT: + cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, + IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); + break; + default: + goto unlock; + } + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + + ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, &msg->send_wr, + &bad_send_wr); + if (ret) + goto free; + return; + +unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); +free: cm_free_msg(msg); +} + +static struct cm_id_private * cm_match_req(struct cm_work *work, + struct cm_id_private *cm_id_priv) +{ + struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; + struct cm_timewait_info *timewait_info; + struct cm_req_msg *req_msg; + unsigned long flags; + + req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; + + /* Check for duplicate REQ and stale connections. */ + spin_lock_irqsave(&cm.lock, flags); + timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); + if (!timewait_info) + timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); + + if (timewait_info) { + cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, + timewait_info->work.remote_id); + spin_unlock_irqrestore(&cm.lock, flags); + if (cur_cm_id_priv) { + cm_dup_req_handler(work, cur_cm_id_priv); + cm_deref_id(cur_cm_id_priv); + } else + cm_issue_rej(work->port, work->mad_recv_wc, + IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, + NULL, 0); + goto error; + } + + /* Find matching listen request. */ + listen_cm_id_priv = cm_find_listen(req_msg->service_id); + if (!listen_cm_id_priv) { + spin_unlock_irqrestore(&cm.lock, flags); + cm_issue_rej(work->port, work->mad_recv_wc, + IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, + NULL, 0); + goto error; + } + atomic_inc(&listen_cm_id_priv->refcount); + atomic_inc(&cm_id_priv->refcount); + cm_id_priv->id.state = IB_CM_REQ_RCVD; + atomic_inc(&cm_id_priv->work_count); + spin_unlock_irqrestore(&cm.lock, flags); + return listen_cm_id_priv; + +error: cm_cleanup_timewait(cm_id_priv->timewait_info); + return NULL; +} + +static int cm_req_handler(struct cm_work *work) +{ + struct ib_cm_id *cm_id; + struct cm_id_private *cm_id_priv, *listen_cm_id_priv; + struct cm_req_msg *req_msg; + int ret; + + req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; + + cm_id = ib_create_cm_id(NULL, NULL); + if (IS_ERR(cm_id)) + return PTR_ERR(cm_id); + + cm_id_priv = container_of(cm_id, struct cm_id_private, id); + cm_id_priv->id.remote_id = req_msg->local_comm_id; + cm_init_av_for_response(work->port, work->mad_recv_wc->wc, + &cm_id_priv->av); + cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> + id.local_id); + if (IS_ERR(cm_id_priv->timewait_info)) { + ret = PTR_ERR(cm_id_priv->timewait_info); + goto error1; + } + cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; + cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; + cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); + + listen_cm_id_priv = cm_match_req(work, cm_id_priv); + if (!listen_cm_id_priv) { + ret = -EINVAL; + goto error2; + } + + cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; + cm_id_priv->id.context = listen_cm_id_priv->id.context; + cm_id_priv->id.service_id = req_msg->service_id; + cm_id_priv->id.service_mask = ~0ULL; + + cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); + ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); + if (ret) + goto error3; + if (req_msg->alt_local_lid) { + ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); + if (ret) + goto error3; + } + cm_id_priv->tid = req_msg->hdr.tid; + cm_id_priv->timeout_ms = cm_convert_to_ms( + cm_req_get_local_resp_timeout(req_msg)); + cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); + cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); + cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); + cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); + cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); + cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); + cm_id_priv->local_ack_timeout = + cm_req_get_primary_local_ack_timeout(req_msg); + cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); + cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); + + cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); + cm_process_work(cm_id_priv, work); + cm_deref_id(listen_cm_id_priv); + return 0; + +error3: atomic_dec(&cm_id_priv->refcount); + cm_deref_id(listen_cm_id_priv); + cm_cleanup_timewait(cm_id_priv->timewait_info); +error2: kfree(cm_id_priv->timewait_info); +error1: ib_destroy_cm_id(&cm_id_priv->id); + return ret; +} + +static void cm_format_rep(struct cm_rep_msg *rep_msg, + struct cm_id_private *cm_id_priv, + struct ib_cm_rep_param *param) +{ + cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); + rep_msg->local_comm_id = cm_id_priv->id.local_id; + rep_msg->remote_comm_id = cm_id_priv->id.remote_id; + cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); + cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); + rep_msg->resp_resources = param->responder_resources; + rep_msg->initiator_depth = param->initiator_depth; + cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay); + cm_rep_set_failover(rep_msg, param->failover_accepted); + cm_rep_set_flow_ctrl(rep_msg, param->flow_control); + cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); + cm_rep_set_srq(rep_msg, param->srq); + rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid; + + if (param->private_data && param->private_data_len) + memcpy(rep_msg->private_data, param->private_data, + param->private_data_len); +} + +int ib_send_cm_rep(struct ib_cm_id *cm_id, + struct ib_cm_rep_param *param) +{ + struct cm_id_private *cm_id_priv; + struct ib_mad_send_buf *msg; + struct cm_rep_msg *rep_msg; + struct ib_send_wr *bad_send_wr; + unsigned long flags; + int ret; + + if (param->private_data && + param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) + return -EINVAL; + + cm_id_priv = container_of(cm_id, struct cm_id_private, id); + spin_lock_irqsave(&cm_id_priv->lock, flags); + if (cm_id->state != IB_CM_REQ_RCVD && + cm_id->state != IB_CM_MRA_REQ_SENT) { + ret = -EINVAL; + goto out; + } + + ret = cm_alloc_msg(cm_id_priv, &msg); + if (ret) + goto out; + + rep_msg = (struct cm_rep_msg *) msg->mad; + cm_format_rep(rep_msg, cm_id_priv, param); + msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms; + msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; + + ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, + &msg->send_wr, &bad_send_wr); + if (ret) { + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + cm_free_msg(msg); + return ret; + } + + cm_id->state = IB_CM_REP_SENT; + cm_id_priv->msg = msg; + cm_id_priv->initiator_depth = param->initiator_depth; + cm_id_priv->responder_resources = param->responder_resources; + cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); + cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg); + +out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); + return ret; +} +EXPORT_SYMBOL(ib_send_cm_rep); + +static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, + struct cm_id_private *cm_id_priv, + const void *private_data, + u8 private_data_len) +{ + cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); + rtu_msg->local_comm_id = cm_id_priv->id.local_id; + rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; + + if (private_data && private_data_len) + memcpy(rtu_msg->private_data, private_data, private_data_len); +} + +int ib_send_cm_rtu(struct ib_cm_id *cm_id, + const void *private_data, + u8 private_data_len) +{ + struct cm_id_private *cm_id_priv; + struct ib_mad_send_buf *msg; + struct ib_send_wr *bad_send_wr; + unsigned long flags; + void *data; + int ret; + + if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) + return -EINVAL; + + data = cm_copy_private_data(private_data, private_data_len); + if (IS_ERR(data)) + return PTR_ERR(data); + + cm_id_priv = container_of(cm_id, struct cm_id_private, id); + spin_lock_irqsave(&cm_id_priv->lock, flags); + if (cm_id->state != IB_CM_REP_RCVD && + cm_id->state != IB_CM_MRA_REP_SENT) { + ret = -EINVAL; + goto error; + } + + ret = cm_alloc_msg(cm_id_priv, &msg); + if (ret) + goto error; + + cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, + private_data, private_data_len); + + ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, + &msg->send_wr, &bad_send_wr); + if (ret) { + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + cm_free_msg(msg); + kfree(data); + return ret; + } + + cm_id->state = IB_CM_ESTABLISHED; + cm_set_private_data(cm_id_priv, data, private_data_len); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + return 0; + +error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); + kfree(data); + return ret; +} +EXPORT_SYMBOL(ib_send_cm_rtu); + +static void cm_format_rep_event(struct cm_work *work) +{ + struct cm_rep_msg *rep_msg; + struct ib_cm_rep_event_param *param; + + rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; + param = &work->cm_event.param.rep_rcvd; + param->remote_ca_guid = rep_msg->local_ca_guid; + param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); + param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg)); + param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); + param->responder_resources = rep_msg->initiator_depth; + param->initiator_depth = rep_msg->resp_resources; + param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); + param->failover_accepted = cm_rep_get_failover(rep_msg); + param->flow_control = cm_rep_get_flow_ctrl(rep_msg); + param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); + param->srq = cm_rep_get_srq(rep_msg); + work->cm_event.private_data = &rep_msg->private_data; +} + +static void cm_dup_rep_handler(struct cm_work *work) +{ + struct cm_id_private *cm_id_priv; + struct cm_rep_msg *rep_msg; + struct ib_mad_send_buf *msg = NULL; + struct ib_send_wr *bad_send_wr; + unsigned long flags; + int ret; + + rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; + cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, + rep_msg->local_comm_id); + if (!cm_id_priv) + return; + + ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); + if (ret) + goto deref; + + spin_lock_irqsave(&cm_id_priv->lock, flags); + if (cm_id_priv->id.state == IB_CM_ESTABLISHED) + cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, + cm_id_priv->private_data, + cm_id_priv->private_data_len); + else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) + cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, + CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, + cm_id_priv->private_data, + cm_id_priv->private_data_len); + else + goto unlock; + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + + ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, &msg->send_wr, + &bad_send_wr); + if (ret) + goto free; + goto deref; + +unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); +free: cm_free_msg(msg); +deref: cm_deref_id(cm_id_priv); +} + +static int cm_rep_handler(struct cm_work *work) +{ + struct cm_id_private *cm_id_priv; + struct cm_rep_msg *rep_msg; + unsigned long flags; + int ret; + + rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; + cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); + if (!cm_id_priv) { + cm_dup_rep_handler(work); + return -EINVAL; + } + + cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; + cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; + cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg); + + spin_lock_irqsave(&cm.lock, flags); + /* Check for duplicate REP. */ + if (cm_insert_remote_id(cm_id_priv->timewait_info)) { + spin_unlock_irqrestore(&cm.lock, flags); + ret = -EINVAL; + goto error; + } + /* Check for a stale connection. */ + if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { + spin_unlock_irqrestore(&cm.lock, flags); + cm_issue_rej(work->port, work->mad_recv_wc, + IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, + NULL, 0); + ret = -EINVAL; + goto error; + } + spin_unlock_irqrestore(&cm.lock, flags); + + cm_format_rep_event(work); + + spin_lock_irqsave(&cm_id_priv->lock, flags); + switch (cm_id_priv->id.state) { + case IB_CM_REQ_SENT: + case IB_CM_MRA_REQ_RCVD: + break; + default: + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + ret = -EINVAL; + goto error; + } + cm_id_priv->id.state = IB_CM_REP_RCVD; + cm_id_priv->id.remote_id = rep_msg->local_comm_id; + cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg); + cm_id_priv->initiator_depth = rep_msg->resp_resources; + cm_id_priv->responder_resources = rep_msg->initiator_depth; + cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); + cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); + + /* todo: handle peer_to_peer */ + + ib_cancel_mad(cm_id_priv->av.port->mad_agent, + (unsigned long) cm_id_priv->msg); + ret = atomic_inc_and_test(&cm_id_priv->work_count); + if (!ret) + list_add_tail(&work->list, &cm_id_priv->work_list); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + + if (ret) + cm_process_work(cm_id_priv, work); + else + cm_deref_id(cm_id_priv); + return 0; + +error: cm_cleanup_timewait(cm_id_priv->timewait_info); + cm_deref_id(cm_id_priv); + return ret; +} + +static int cm_establish_handler(struct cm_work *work) +{ + struct cm_id_private *cm_id_priv; + unsigned long flags; + int ret; + + /* See comment in ib_cm_establish about lookup. */ + cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); + if (!cm_id_priv) + return -EINVAL; + + spin_lock_irqsave(&cm_id_priv->lock, flags); + if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + goto out; + } + + ib_cancel_mad(cm_id_priv->av.port->mad_agent, + (unsigned long) cm_id_priv->msg); + ret = atomic_inc_and_test(&cm_id_priv->work_count); + if (!ret) + list_add_tail(&work->list, &cm_id_priv->work_list); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + + if (ret) + cm_process_work(cm_id_priv, work); + else + cm_deref_id(cm_id_priv); + return 0; +out: + cm_deref_id(cm_id_priv); + return -EINVAL; +} + +static int cm_rtu_handler(struct cm_work *work) +{ + struct cm_id_private *cm_id_priv; + struct cm_rtu_msg *rtu_msg; + unsigned long flags; + int ret; + + rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; + cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, + rtu_msg->local_comm_id); + if (!cm_id_priv) + return -EINVAL; + + work->cm_event.private_data = &rtu_msg->private_data; + + spin_lock_irqsave(&cm_id_priv->lock, flags); + if (cm_id_priv->id.state != IB_CM_REP_SENT && + cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + goto out; + } + cm_id_priv->id.state = IB_CM_ESTABLISHED; + + ib_cancel_mad(cm_id_priv->av.port->mad_agent, + (unsigned long) cm_id_priv->msg); + ret = atomic_inc_and_test(&cm_id_priv->work_count); + if (!ret) + list_add_tail(&work->list, &cm_id_priv->work_list); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + + if (ret) + cm_process_work(cm_id_priv, work); + else + cm_deref_id(cm_id_priv); + return 0; +out: + cm_deref_id(cm_id_priv); + return -EINVAL; +} + +static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, + struct cm_id_private *cm_id_priv, + const void *private_data, + u8 private_data_len) +{ + cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, + cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); + dreq_msg->local_comm_id = cm_id_priv->id.local_id; + dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; + cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); + + if (private_data && private_data_len) + memcpy(dreq_msg->private_data, private_data, private_data_len); +} + +int ib_send_cm_dreq(struct ib_cm_id *cm_id, + const void *private_data, + u8 private_data_len) +{ + struct cm_id_private *cm_id_priv; + struct ib_mad_send_buf *msg; + struct ib_send_wr *bad_send_wr; + unsigned long flags; + int ret; + + if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) + return -EINVAL; + + cm_id_priv = container_of(cm_id, struct cm_id_private, id); + spin_lock_irqsave(&cm_id_priv->lock, flags); + if (cm_id->state != IB_CM_ESTABLISHED) { + ret = -EINVAL; + goto out; + } + + ret = cm_alloc_msg(cm_id_priv, &msg); + if (ret) { + cm_enter_timewait(cm_id_priv); + goto out; + } + + cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, + private_data, private_data_len); + msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms; + msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; + + ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, + &msg->send_wr, &bad_send_wr); + if (ret) { + cm_enter_timewait(cm_id_priv); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + cm_free_msg(msg); + return ret; + } + + cm_id->state = IB_CM_DREQ_SENT; + cm_id_priv->msg = msg; +out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); + return ret; +} +EXPORT_SYMBOL(ib_send_cm_dreq); + +static void cm_format_drep(struct cm_drep_msg *drep_msg, + struct cm_id_private *cm_id_priv, + const void *private_data, + u8 private_data_len) +{ + cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); + drep_msg->local_comm_id = cm_id_priv->id.local_id; + drep_msg->remote_comm_id = cm_id_priv->id.remote_id; + + if (private_data && private_data_len) + memcpy(drep_msg->private_data, private_data, private_data_len); +} + +int ib_send_cm_drep(struct ib_cm_id *cm_id, + const void *private_data, + u8 private_data_len) +{ + struct cm_id_private *cm_id_priv; + struct ib_mad_send_buf *msg; + struct ib_send_wr *bad_send_wr; + unsigned long flags; + void *data; + int ret; + + if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) + return -EINVAL; + + data = cm_copy_private_data(private_data, private_data_len); + if (IS_ERR(data)) + return PTR_ERR(data); + + cm_id_priv = container_of(cm_id, struct cm_id_private, id); + spin_lock_irqsave(&cm_id_priv->lock, flags); + if (cm_id->state != IB_CM_DREQ_RCVD) { + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + kfree(data); + return -EINVAL; + } + + cm_set_private_data(cm_id_priv, data, private_data_len); + cm_enter_timewait(cm_id_priv); + + ret = cm_alloc_msg(cm_id_priv, &msg); + if (ret) + goto out; + + cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, + private_data, private_data_len); + + ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, &msg->send_wr, + &bad_send_wr); + if (ret) { + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + cm_free_msg(msg); + return ret; + } + +out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); + return ret; +} +EXPORT_SYMBOL(ib_send_cm_drep); + +static int cm_dreq_handler(struct cm_work *work) +{ + struct cm_id_private *cm_id_priv; + struct cm_dreq_msg *dreq_msg; + struct ib_mad_send_buf *msg = NULL; + struct ib_send_wr *bad_send_wr; + unsigned long flags; + int ret; + + dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; + cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, + dreq_msg->local_comm_id); + if (!cm_id_priv) + return -EINVAL; + + work->cm_event.private_data = &dreq_msg->private_data; + + spin_lock_irqsave(&cm_id_priv->lock, flags); + if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) + goto unlock; + + switch (cm_id_priv->id.state) { + case IB_CM_REP_SENT: + case IB_CM_DREQ_SENT: + ib_cancel_mad(cm_id_priv->av.port->mad_agent, + (unsigned long) cm_id_priv->msg); + break; + case IB_CM_ESTABLISHED: + case IB_CM_MRA_REP_RCVD: + break; + case IB_CM_TIMEWAIT: + if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) + goto unlock; + + cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, + cm_id_priv->private_data, + cm_id_priv->private_data_len); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + + if (ib_post_send_mad(cm_id_priv->av.port->mad_agent, + &msg->send_wr, &bad_send_wr)) + cm_free_msg(msg); + goto deref; + default: + goto unlock; + } + cm_id_priv->id.state = IB_CM_DREQ_RCVD; + cm_id_priv->tid = dreq_msg->hdr.tid; + ret = atomic_inc_and_test(&cm_id_priv->work_count); + if (!ret) + list_add_tail(&work->list, &cm_id_priv->work_list); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + + if (ret) + cm_process_work(cm_id_priv, work); + else + cm_deref_id(cm_id_priv); + return 0; + +unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); +deref: cm_deref_id(cm_id_priv); + return -EINVAL; +} + +static int cm_drep_handler(struct cm_work *work) +{ + struct cm_id_private *cm_id_priv; + struct cm_drep_msg *drep_msg; + unsigned long flags; + int ret; + + drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; + cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, + drep_msg->local_comm_id); + if (!cm_id_priv) + return -EINVAL; + + work->cm_event.private_data = &drep_msg->private_data; + + spin_lock_irqsave(&cm_id_priv->lock, flags); + if (cm_id_priv->id.state != IB_CM_DREQ_SENT && + cm_id_priv->id.state != IB_CM_DREQ_RCVD) { + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + goto out; + } + cm_enter_timewait(cm_id_priv); + + ib_cancel_mad(cm_id_priv->av.port->mad_agent, + (unsigned long) cm_id_priv->msg); + ret = atomic_inc_and_test(&cm_id_priv->work_count); + if (!ret) + list_add_tail(&work->list, &cm_id_priv->work_list); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + + if (ret) + cm_process_work(cm_id_priv, work); + else + cm_deref_id(cm_id_priv); + return 0; +out: + cm_deref_id(cm_id_priv); + return -EINVAL; +} + +int ib_send_cm_rej(struct ib_cm_id *cm_id, + enum ib_cm_rej_reason reason, + void *ari, + u8 ari_length, + const void *private_data, + u8 private_data_len) +{ + struct cm_id_private *cm_id_priv; + struct ib_mad_send_buf *msg; + struct ib_send_wr *bad_send_wr; + unsigned long flags; + int ret; + + if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || + (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) + return -EINVAL; + + cm_id_priv = container_of(cm_id, struct cm_id_private, id); + + spin_lock_irqsave(&cm_id_priv->lock, flags); + switch (cm_id->state) { + case IB_CM_REQ_SENT: + case IB_CM_MRA_REQ_RCVD: + case IB_CM_REQ_RCVD: + case IB_CM_MRA_REQ_SENT: + case IB_CM_REP_RCVD: + case IB_CM_MRA_REP_SENT: + ret = cm_alloc_msg(cm_id_priv, &msg); + if (!ret) + cm_format_rej((struct cm_rej_msg *) msg->mad, + cm_id_priv, reason, ari, ari_length, + private_data, private_data_len); + + cm_reset_to_idle(cm_id_priv); + break; + case IB_CM_REP_SENT: + case IB_CM_MRA_REP_RCVD: + ret = cm_alloc_msg(cm_id_priv, &msg); + if (!ret) + cm_format_rej((struct cm_rej_msg *) msg->mad, + cm_id_priv, reason, ari, ari_length, + private_data, private_data_len); + + cm_enter_timewait(cm_id_priv); + break; + default: + ret = -EINVAL; + goto out; + } + + if (ret) + goto out; + + ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, + &msg->send_wr, &bad_send_wr); + if (ret) + cm_free_msg(msg); + +out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); + return ret; +} +EXPORT_SYMBOL(ib_send_cm_rej); + +static void cm_format_rej_event(struct cm_work *work) +{ + struct cm_rej_msg *rej_msg; + struct ib_cm_rej_event_param *param; + + rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; + param = &work->cm_event.param.rej_rcvd; + param->ari = rej_msg->ari; + param->ari_length = cm_rej_get_reject_info_len(rej_msg); + param->reason = rej_msg->reason; + work->cm_event.private_data = &rej_msg->private_data; +} + +static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) +{ + struct cm_timewait_info *timewait_info; + struct cm_id_private *cm_id_priv; + unsigned long flags; + u32 remote_id; + + remote_id = rej_msg->local_comm_id; + + if (rej_msg->reason == IB_CM_REJ_TIMEOUT) { + spin_lock_irqsave(&cm.lock, flags); + timewait_info = cm_find_remote_id( *((u64 *) rej_msg->ari), + remote_id); + if (!timewait_info) { + spin_unlock_irqrestore(&cm.lock, flags); + return NULL; + } + cm_id_priv = idr_find(&cm.local_id_table, + (int) timewait_info->work.local_id); + if (cm_id_priv) { + if (cm_id_priv->id.remote_id == remote_id) + atomic_inc(&cm_id_priv->refcount); + else + cm_id_priv = NULL; + } + spin_unlock_irqrestore(&cm.lock, flags); + } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) + cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); + else + cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); + + return cm_id_priv; +} + +static int cm_rej_handler(struct cm_work *work) +{ + struct cm_id_private *cm_id_priv; + struct cm_rej_msg *rej_msg; + unsigned long flags; + int ret; + + rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; + cm_id_priv = cm_acquire_rejected_id(rej_msg); + if (!cm_id_priv) + return -EINVAL; + + cm_format_rej_event(work); + + spin_lock_irqsave(&cm_id_priv->lock, flags); + switch (cm_id_priv->id.state) { + case IB_CM_REQ_SENT: + case IB_CM_MRA_REQ_RCVD: + case IB_CM_REP_SENT: + case IB_CM_MRA_REP_RCVD: + ib_cancel_mad(cm_id_priv->av.port->mad_agent, + (unsigned long) cm_id_priv->msg); + /* fall through */ + case IB_CM_REQ_RCVD: + case IB_CM_MRA_REQ_SENT: + if (rej_msg->reason == IB_CM_REJ_STALE_CONN) + cm_enter_timewait(cm_id_priv); + else + cm_reset_to_idle(cm_id_priv); + break; + case IB_CM_DREQ_SENT: + ib_cancel_mad(cm_id_priv->av.port->mad_agent, + (unsigned long) cm_id_priv->msg); + /* fall through */ + case IB_CM_REP_RCVD: + case IB_CM_MRA_REP_SENT: + case IB_CM_ESTABLISHED: + cm_enter_timewait(cm_id_priv); + break; + default: + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + ret = -EINVAL; + goto out; + } + + ret = atomic_inc_and_test(&cm_id_priv->work_count); + if (!ret) + list_add_tail(&work->list, &cm_id_priv->work_list); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + + if (ret) + cm_process_work(cm_id_priv, work); + else + cm_deref_id(cm_id_priv); + return 0; +out: + cm_deref_id(cm_id_priv); + return -EINVAL; +} + +int ib_send_cm_mra(struct ib_cm_id *cm_id, + u8 service_timeout, + const void *private_data, + u8 private_data_len) +{ + struct cm_id_private *cm_id_priv; + struct ib_mad_send_buf *msg; + struct ib_send_wr *bad_send_wr; + void *data; + unsigned long flags; + int ret; + + if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) + return -EINVAL; + + data = cm_copy_private_data(private_data, private_data_len); + if (IS_ERR(data)) + return PTR_ERR(data); + + cm_id_priv = container_of(cm_id, struct cm_id_private, id); + + spin_lock_irqsave(&cm_id_priv->lock, flags); + switch(cm_id_priv->id.state) { + case IB_CM_REQ_RCVD: + ret = cm_alloc_msg(cm_id_priv, &msg); + if (ret) + goto error1; + + cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, + CM_MSG_RESPONSE_REQ, service_timeout, + private_data, private_data_len); + ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, + &msg->send_wr, &bad_send_wr); + if (ret) + goto error2; + cm_id->state = IB_CM_MRA_REQ_SENT; + break; + case IB_CM_REP_RCVD: + ret = cm_alloc_msg(cm_id_priv, &msg); + if (ret) + goto error1; + + cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, + CM_MSG_RESPONSE_REP, service_timeout, + private_data, private_data_len); + ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, + &msg->send_wr, &bad_send_wr); + if (ret) + goto error2; + cm_id->state = IB_CM_MRA_REP_SENT; + break; + case IB_CM_ESTABLISHED: + ret = cm_alloc_msg(cm_id_priv, &msg); + if (ret) + goto error1; + + cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, + CM_MSG_RESPONSE_OTHER, service_timeout, + private_data, private_data_len); + ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, + &msg->send_wr, &bad_send_wr); + if (ret) + goto error2; + cm_id->lap_state = IB_CM_MRA_LAP_SENT; + break; + default: + ret = -EINVAL; + goto error1; + } + cm_id_priv->service_timeout = service_timeout; + cm_set_private_data(cm_id_priv, data, private_data_len); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + return 0; + +error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); + kfree(data); + return ret; + +error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); + kfree(data); + cm_free_msg(msg); + return ret; +} +EXPORT_SYMBOL(ib_send_cm_mra); + +static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) +{ + switch (cm_mra_get_msg_mraed(mra_msg)) { + case CM_MSG_RESPONSE_REQ: + return cm_acquire_id(mra_msg->remote_comm_id, 0); + case CM_MSG_RESPONSE_REP: + case CM_MSG_RESPONSE_OTHER: + return cm_acquire_id(mra_msg->remote_comm_id, + mra_msg->local_comm_id); + default: + return NULL; + } +} + +static int cm_mra_handler(struct cm_work *work) +{ + struct cm_id_private *cm_id_priv; + struct cm_mra_msg *mra_msg; + unsigned long flags; + int timeout, ret; + + mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; + cm_id_priv = cm_acquire_mraed_id(mra_msg); + if (!cm_id_priv) + return -EINVAL; + + work->cm_event.private_data = &mra_msg->private_data; + work->cm_event.param.mra_rcvd.service_timeout = + cm_mra_get_service_timeout(mra_msg); + timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + + cm_convert_to_ms(cm_id_priv->av.packet_life_time); + + spin_lock_irqsave(&cm_id_priv->lock, flags); + switch (cm_id_priv->id.state) { + case IB_CM_REQ_SENT: + if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || + ib_modify_mad(cm_id_priv->av.port->mad_agent, + (unsigned long) cm_id_priv->msg, timeout)) + goto out; + cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; + break; + case IB_CM_REP_SENT: + if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || + ib_modify_mad(cm_id_priv->av.port->mad_agent, + (unsigned long) cm_id_priv->msg, timeout)) + goto out; + cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; + break; + case IB_CM_ESTABLISHED: + if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || + cm_id_priv->id.lap_state != IB_CM_LAP_SENT || + ib_modify_mad(cm_id_priv->av.port->mad_agent, + (unsigned long) cm_id_priv->msg, timeout)) + goto out; + cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; + break; + default: + goto out; + } + + cm_id_priv->msg->context[1] = (void *) (unsigned long) + cm_id_priv->id.state; + ret = atomic_inc_and_test(&cm_id_priv->work_count); + if (!ret) + list_add_tail(&work->list, &cm_id_priv->work_list); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + + if (ret) + cm_process_work(cm_id_priv, work); + else + cm_deref_id(cm_id_priv); + return 0; +out: + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + cm_deref_id(cm_id_priv); + return -EINVAL; +} + +static void cm_format_lap(struct cm_lap_msg *lap_msg, + struct cm_id_private *cm_id_priv, + struct ib_sa_path_rec *alternate_path, + const void *private_data, + u8 private_data_len) +{ + cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, + cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); + lap_msg->local_comm_id = cm_id_priv->id.local_id; + lap_msg->remote_comm_id = cm_id_priv->id.remote_id; + cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); + /* todo: need remote CM response timeout */ + cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); + lap_msg->alt_local_lid = alternate_path->slid; + lap_msg->alt_remote_lid = alternate_path->dlid; + lap_msg->alt_local_gid = alternate_path->sgid; + lap_msg->alt_remote_gid = alternate_path->dgid; + cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); + cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); + lap_msg->alt_hop_limit = alternate_path->hop_limit; + cm_lap_set_packet_rate(lap_msg, alternate_path->rate); + cm_lap_set_sl(lap_msg, alternate_path->sl); + cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ + cm_lap_set_local_ack_timeout(lap_msg, + min(31, alternate_path->packet_life_time + 1)); + + if (private_data && private_data_len) + memcpy(lap_msg->private_data, private_data, private_data_len); +} + +int ib_send_cm_lap(struct ib_cm_id *cm_id, + struct ib_sa_path_rec *alternate_path, + const void *private_data, + u8 private_data_len) +{ + struct cm_id_private *cm_id_priv; + struct ib_mad_send_buf *msg; + struct ib_send_wr *bad_send_wr; + unsigned long flags; + int ret; + + if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) + return -EINVAL; + + cm_id_priv = container_of(cm_id, struct cm_id_private, id); + spin_lock_irqsave(&cm_id_priv->lock, flags); + if (cm_id->state != IB_CM_ESTABLISHED || + cm_id->lap_state != IB_CM_LAP_IDLE) { + ret = -EINVAL; + goto out; + } + + ret = cm_alloc_msg(cm_id_priv, &msg); + if (ret) + goto out; + + cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, + alternate_path, private_data, private_data_len); + msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms; + msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; + + ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, + &msg->send_wr, &bad_send_wr); + if (ret) { + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + cm_free_msg(msg); + return ret; + } + + cm_id->lap_state = IB_CM_LAP_SENT; + cm_id_priv->msg = msg; + +out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); + return ret; +} +EXPORT_SYMBOL(ib_send_cm_lap); + +static void cm_format_path_from_lap(struct ib_sa_path_rec *path, + struct cm_lap_msg *lap_msg) +{ + memset(path, 0, sizeof *path); + path->dgid = lap_msg->alt_local_gid; + path->sgid = lap_msg->alt_remote_gid; + path->dlid = lap_msg->alt_local_lid; + path->slid = lap_msg->alt_remote_lid; + path->flow_label = cm_lap_get_flow_label(lap_msg); + path->hop_limit = lap_msg->alt_hop_limit; + path->traffic_class = cm_lap_get_traffic_class(lap_msg); + path->reversible = 1; + /* pkey is same as in REQ */ + path->sl = cm_lap_get_sl(lap_msg); + path->mtu_selector = IB_SA_EQ; + /* mtu is same as in REQ */ + path->rate_selector = IB_SA_EQ; + path->rate = cm_lap_get_packet_rate(lap_msg); + path->packet_life_time_selector = IB_SA_EQ; + path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); + path->packet_life_time -= (path->packet_life_time > 0); +} + +static int cm_lap_handler(struct cm_work *work) +{ + struct cm_id_private *cm_id_priv; + struct cm_lap_msg *lap_msg; + struct ib_cm_lap_event_param *param; + struct ib_mad_send_buf *msg = NULL; + struct ib_send_wr *bad_send_wr; + unsigned long flags; + int ret; + + /* todo: verify LAP request and send reject APR if invalid. */ + lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; + cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, + lap_msg->local_comm_id); + if (!cm_id_priv) + return -EINVAL; + + param = &work->cm_event.param.lap_rcvd; + param->alternate_path = &work->path[0]; + cm_format_path_from_lap(param->alternate_path, lap_msg); + work->cm_event.private_data = &lap_msg->private_data; + + spin_lock_irqsave(&cm_id_priv->lock, flags); + if (cm_id_priv->id.state != IB_CM_ESTABLISHED) + goto unlock; + + switch (cm_id_priv->id.lap_state) { + case IB_CM_LAP_IDLE: + break; + case IB_CM_MRA_LAP_SENT: + if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) + goto unlock; + + cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, + CM_MSG_RESPONSE_OTHER, + cm_id_priv->service_timeout, + cm_id_priv->private_data, + cm_id_priv->private_data_len); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + + if (ib_post_send_mad(cm_id_priv->av.port->mad_agent, + &msg->send_wr, &bad_send_wr)) + cm_free_msg(msg); + goto deref; + default: + goto unlock; + } + + cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; + cm_id_priv->tid = lap_msg->hdr.tid; + ret = atomic_inc_and_test(&cm_id_priv->work_count); + if (!ret) + list_add_tail(&work->list, &cm_id_priv->work_list); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + + if (ret) + cm_process_work(cm_id_priv, work); + else + cm_deref_id(cm_id_priv); + return 0; + +unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); +deref: cm_deref_id(cm_id_priv); + return -EINVAL; +} + +static void cm_format_apr(struct cm_apr_msg *apr_msg, + struct cm_id_private *cm_id_priv, + enum ib_cm_apr_status status, + void *info, + u8 info_length, + const void *private_data, + u8 private_data_len) +{ + cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); + apr_msg->local_comm_id = cm_id_priv->id.local_id; + apr_msg->remote_comm_id = cm_id_priv->id.remote_id; + apr_msg->ap_status = (u8) status; + + if (info && info_length) { + apr_msg->info_length = info_length; + memcpy(apr_msg->info, info, info_length); + } + + if (private_data && private_data_len) + memcpy(apr_msg->private_data, private_data, private_data_len); +} + +int ib_send_cm_apr(struct ib_cm_id *cm_id, + enum ib_cm_apr_status status, + void *info, + u8 info_length, + const void *private_data, + u8 private_data_len) +{ + struct cm_id_private *cm_id_priv; + struct ib_mad_send_buf *msg; + struct ib_send_wr *bad_send_wr; + unsigned long flags; + int ret; + + if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || + (info && info_length > IB_CM_APR_INFO_LENGTH)) + return -EINVAL; + + cm_id_priv = container_of(cm_id, struct cm_id_private, id); + spin_lock_irqsave(&cm_id_priv->lock, flags); + if (cm_id->state != IB_CM_ESTABLISHED || + (cm_id->lap_state != IB_CM_LAP_RCVD && + cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { + ret = -EINVAL; + goto out; + } + + ret = cm_alloc_msg(cm_id_priv, &msg); + if (ret) + goto out; + + cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, + info, info_length, private_data, private_data_len); + ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, + &msg->send_wr, &bad_send_wr); + if (ret) { + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + cm_free_msg(msg); + return ret; + } + + cm_id->lap_state = IB_CM_LAP_IDLE; +out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); + return ret; +} +EXPORT_SYMBOL(ib_send_cm_apr); + +static int cm_apr_handler(struct cm_work *work) +{ + struct cm_id_private *cm_id_priv; + struct cm_apr_msg *apr_msg; + unsigned long flags; + int ret; + + apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; + cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, + apr_msg->local_comm_id); + if (!cm_id_priv) + return -EINVAL; /* Unmatched reply. */ + + work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; + work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; + work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; + work->cm_event.private_data = &apr_msg->private_data; + + spin_lock_irqsave(&cm_id_priv->lock, flags); + if (cm_id_priv->id.state != IB_CM_ESTABLISHED || + (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && + cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + goto out; + } + cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; + ib_cancel_mad(cm_id_priv->av.port->mad_agent, + (unsigned long) cm_id_priv->msg); + cm_id_priv->msg = NULL; + + ret = atomic_inc_and_test(&cm_id_priv->work_count); + if (!ret) + list_add_tail(&work->list, &cm_id_priv->work_list); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + + if (ret) + cm_process_work(cm_id_priv, work); + else + cm_deref_id(cm_id_priv); + return 0; +out: + cm_deref_id(cm_id_priv); + return -EINVAL; +} + +static int cm_timewait_handler(struct cm_work *work) +{ + struct cm_timewait_info *timewait_info; + struct cm_id_private *cm_id_priv; + unsigned long flags; + int ret; + + timewait_info = (struct cm_timewait_info *)work; + cm_cleanup_timewait(timewait_info); + + cm_id_priv = cm_acquire_id(timewait_info->work.local_id, + timewait_info->work.remote_id); + if (!cm_id_priv) + return -EINVAL; + + spin_lock_irqsave(&cm_id_priv->lock, flags); + if (cm_id_priv->id.state != IB_CM_TIMEWAIT || + cm_id_priv->remote_qpn != timewait_info->remote_qpn) { + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + goto out; + } + cm_id_priv->id.state = IB_CM_IDLE; + ret = atomic_inc_and_test(&cm_id_priv->work_count); + if (!ret) + list_add_tail(&work->list, &cm_id_priv->work_list); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + + if (ret) + cm_process_work(cm_id_priv, work); + else + cm_deref_id(cm_id_priv); + return 0; +out: + cm_deref_id(cm_id_priv); + return -EINVAL; +} + +static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, + struct cm_id_private *cm_id_priv, + struct ib_cm_sidr_req_param *param) +{ + cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, + cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); + sidr_req_msg->request_id = cm_id_priv->id.local_id; + sidr_req_msg->pkey = param->pkey; + sidr_req_msg->service_id = param->service_id; + + if (param->private_data && param->private_data_len) + memcpy(sidr_req_msg->private_data, param->private_data, + param->private_data_len); +} + +int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, + struct ib_cm_sidr_req_param *param) +{ + struct cm_id_private *cm_id_priv; + struct ib_mad_send_buf *msg; + struct ib_send_wr *bad_send_wr; + unsigned long flags; + int ret; + + if (!param->path || (param->private_data && + param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) + return -EINVAL; + + cm_id_priv = container_of(cm_id, struct cm_id_private, id); + ret = cm_init_av_by_path(param->path, &cm_id_priv->av); + if (ret) + goto out; + + cm_id->service_id = param->service_id; + cm_id->service_mask = ~0ULL; + cm_id_priv->timeout_ms = param->timeout_ms; + cm_id_priv->max_cm_retries = param->max_cm_retries; + ret = cm_alloc_msg(cm_id_priv, &msg); + if (ret) + goto out; + + cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, + param); + msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms; + msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; + + spin_lock_irqsave(&cm_id_priv->lock, flags); + if (cm_id->state == IB_CM_IDLE) + ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, + &msg->send_wr, &bad_send_wr); + else + ret = -EINVAL; + + if (ret) { + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + cm_free_msg(msg); + goto out; + } + cm_id->state = IB_CM_SIDR_REQ_SENT; + cm_id_priv->msg = msg; + spin_unlock_irqrestore(&cm_id_priv->lock, flags); +out: + return ret; +} +EXPORT_SYMBOL(ib_send_cm_sidr_req); + +static void cm_format_sidr_req_event(struct cm_work *work, + struct ib_cm_id *listen_id) +{ + struct cm_sidr_req_msg *sidr_req_msg; + struct ib_cm_sidr_req_event_param *param; + + sidr_req_msg = (struct cm_sidr_req_msg *) + work->mad_recv_wc->recv_buf.mad; + param = &work->cm_event.param.sidr_req_rcvd; + param->pkey = sidr_req_msg->pkey; + param->listen_id = listen_id; + param->device = work->port->mad_agent->device; + param->port = work->port->port_num; + work->cm_event.private_data = &sidr_req_msg->private_data; +} + +static int cm_sidr_req_handler(struct cm_work *work) +{ + struct ib_cm_id *cm_id; + struct cm_id_private *cm_id_priv, *cur_cm_id_priv; + struct cm_sidr_req_msg *sidr_req_msg; + struct ib_wc *wc; + unsigned long flags; + + cm_id = ib_create_cm_id(NULL, NULL); + if (IS_ERR(cm_id)) + return PTR_ERR(cm_id); + cm_id_priv = container_of(cm_id, struct cm_id_private, id); + + /* Record SGID/SLID and request ID for lookup. */ + sidr_req_msg = (struct cm_sidr_req_msg *) + work->mad_recv_wc->recv_buf.mad; + wc = work->mad_recv_wc->wc; + cm_id_priv->av.dgid.global.subnet_prefix = wc->slid; + cm_id_priv->av.dgid.global.interface_id = 0; + cm_init_av_for_response(work->port, work->mad_recv_wc->wc, + &cm_id_priv->av); + cm_id_priv->id.remote_id = sidr_req_msg->request_id; + cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; + cm_id_priv->tid = sidr_req_msg->hdr.tid; + atomic_inc(&cm_id_priv->work_count); + + spin_lock_irqsave(&cm.lock, flags); + cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); + if (cur_cm_id_priv) { + spin_unlock_irqrestore(&cm.lock, flags); + goto out; /* Duplicate message. */ + } + cur_cm_id_priv = cm_find_listen(sidr_req_msg->service_id); + if (!cur_cm_id_priv) { + rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); + spin_unlock_irqrestore(&cm.lock, flags); + /* todo: reply with no match */ + goto out; /* No match. */ + } + atomic_inc(&cur_cm_id_priv->refcount); + spin_unlock_irqrestore(&cm.lock, flags); + + cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; + cm_id_priv->id.context = cur_cm_id_priv->id.context; + cm_id_priv->id.service_id = sidr_req_msg->service_id; + cm_id_priv->id.service_mask = ~0ULL; + + cm_format_sidr_req_event(work, &cur_cm_id_priv->id); + cm_process_work(cm_id_priv, work); + cm_deref_id(cur_cm_id_priv); + return 0; +out: + ib_destroy_cm_id(&cm_id_priv->id); + return -EINVAL; +} + +static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, + struct cm_id_private *cm_id_priv, + struct ib_cm_sidr_rep_param *param) +{ + cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, + cm_id_priv->tid); + sidr_rep_msg->request_id = cm_id_priv->id.remote_id; + sidr_rep_msg->status = param->status; + cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); + sidr_rep_msg->service_id = cm_id_priv->id.service_id; + sidr_rep_msg->qkey = cpu_to_be32(param->qkey); + + if (param->info && param->info_length) + memcpy(sidr_rep_msg->info, param->info, param->info_length); + + if (param->private_data && param->private_data_len) + memcpy(sidr_rep_msg->private_data, param->private_data, + param->private_data_len); +} + +int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, + struct ib_cm_sidr_rep_param *param) +{ + struct cm_id_private *cm_id_priv; + struct ib_mad_send_buf *msg; + struct ib_send_wr *bad_send_wr; + unsigned long flags; + int ret; + + if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || + (param->private_data && + param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) + return -EINVAL; + + cm_id_priv = container_of(cm_id, struct cm_id_private, id); + spin_lock_irqsave(&cm_id_priv->lock, flags); + if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { + ret = -EINVAL; + goto error; + } + + ret = cm_alloc_msg(cm_id_priv, &msg); + if (ret) + goto error; + + cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, + param); + ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, + &msg->send_wr, &bad_send_wr); + if (ret) { + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + cm_free_msg(msg); + return ret; + } + cm_id->state = IB_CM_IDLE; + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + + spin_lock_irqsave(&cm.lock, flags); + rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); + spin_unlock_irqrestore(&cm.lock, flags); + return 0; + +error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); + return ret; +} +EXPORT_SYMBOL(ib_send_cm_sidr_rep); + +static void cm_format_sidr_rep_event(struct cm_work *work) +{ + struct cm_sidr_rep_msg *sidr_rep_msg; + struct ib_cm_sidr_rep_event_param *param; + + sidr_rep_msg = (struct cm_sidr_rep_msg *) + work->mad_recv_wc->recv_buf.mad; + param = &work->cm_event.param.sidr_rep_rcvd; + param->status = sidr_rep_msg->status; + param->qkey = be32_to_cpu(sidr_rep_msg->qkey); + param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); + param->info = &sidr_rep_msg->info; + param->info_len = sidr_rep_msg->info_length; + work->cm_event.private_data = &sidr_rep_msg->private_data; +} + +static int cm_sidr_rep_handler(struct cm_work *work) +{ + struct cm_sidr_rep_msg *sidr_rep_msg; + struct cm_id_private *cm_id_priv; + unsigned long flags; + + sidr_rep_msg = (struct cm_sidr_rep_msg *) + work->mad_recv_wc->recv_buf.mad; + cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); + if (!cm_id_priv) + return -EINVAL; /* Unmatched reply. */ + + spin_lock_irqsave(&cm_id_priv->lock, flags); + if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + goto out; + } + cm_id_priv->id.state = IB_CM_IDLE; + ib_cancel_mad(cm_id_priv->av.port->mad_agent, + (unsigned long) cm_id_priv->msg); + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + + cm_format_sidr_rep_event(work); + cm_process_work(cm_id_priv, work); + return 0; +out: + cm_deref_id(cm_id_priv); + return -EINVAL; +} + +static void cm_process_send_error(struct ib_mad_send_buf *msg, + enum ib_wc_status wc_status) +{ + struct cm_id_private *cm_id_priv; + struct ib_cm_event cm_event; + enum ib_cm_state state; + unsigned long flags; + int ret; + + memset(&cm_event, 0, sizeof cm_event); + cm_id_priv = msg->context[0]; + + /* Discard old sends or ones without a response. */ + spin_lock_irqsave(&cm_id_priv->lock, flags); + state = (enum ib_cm_state) (unsigned long) msg->context[1]; + if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) + goto discard; + + switch (state) { + case IB_CM_REQ_SENT: + case IB_CM_MRA_REQ_RCVD: + cm_reset_to_idle(cm_id_priv); + cm_event.event = IB_CM_REQ_ERROR; + break; + case IB_CM_REP_SENT: + case IB_CM_MRA_REP_RCVD: + cm_reset_to_idle(cm_id_priv); + cm_event.event = IB_CM_REP_ERROR; + break; + case IB_CM_DREQ_SENT: + cm_enter_timewait(cm_id_priv); + cm_event.event = IB_CM_DREQ_ERROR; + break; + case IB_CM_SIDR_REQ_SENT: + cm_id_priv->id.state = IB_CM_IDLE; + cm_event.event = IB_CM_SIDR_REQ_ERROR; + break; + default: + goto discard; + } + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + cm_event.param.send_status = wc_status; + + /* No other events can occur on the cm_id at this point. */ + ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); + cm_free_msg(msg); + if (ret) + ib_destroy_cm_id(&cm_id_priv->id); + return; +discard: + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + cm_free_msg(msg); +} + +static void cm_send_handler(struct ib_mad_agent *mad_agent, + struct ib_mad_send_wc *mad_send_wc) +{ + struct ib_mad_send_buf *msg; + + msg = (struct ib_mad_send_buf *)(unsigned long)mad_send_wc->wr_id; + + switch (mad_send_wc->status) { + case IB_WC_SUCCESS: + case IB_WC_WR_FLUSH_ERR: + cm_free_msg(msg); + break; + default: + if (msg->context[0] && msg->context[1]) + cm_process_send_error(msg, mad_send_wc->status); + else + cm_free_msg(msg); + break; + } +} + +static void cm_work_handler(void *data) +{ + struct cm_work *work = data; + int ret; + + switch (work->cm_event.event) { + case IB_CM_REQ_RECEIVED: + ret = cm_req_handler(work); + break; + case IB_CM_MRA_RECEIVED: + ret = cm_mra_handler(work); + break; + case IB_CM_REJ_RECEIVED: + ret = cm_rej_handler(work); + break; + case IB_CM_REP_RECEIVED: + ret = cm_rep_handler(work); + break; + case IB_CM_RTU_RECEIVED: + ret = cm_rtu_handler(work); + break; + case IB_CM_USER_ESTABLISHED: + ret = cm_establish_handler(work); + break; + case IB_CM_DREQ_RECEIVED: + ret = cm_dreq_handler(work); + break; + case IB_CM_DREP_RECEIVED: + ret = cm_drep_handler(work); + break; + case IB_CM_SIDR_REQ_RECEIVED: + ret = cm_sidr_req_handler(work); + break; + case IB_CM_SIDR_REP_RECEIVED: + ret = cm_sidr_rep_handler(work); + break; + case IB_CM_LAP_RECEIVED: + ret = cm_lap_handler(work); + break; + case IB_CM_APR_RECEIVED: + ret = cm_apr_handler(work); + break; + case IB_CM_TIMEWAIT_EXIT: + ret = cm_timewait_handler(work); + break; + default: + ret = -EINVAL; + break; + } + if (ret) + cm_free_work(work); +} + +int ib_cm_establish(struct ib_cm_id *cm_id) +{ + struct cm_id_private *cm_id_priv; + struct cm_work *work; + unsigned long flags; + int ret = 0; + + work = kmalloc(sizeof *work, GFP_ATOMIC); + if (!work) + return -ENOMEM; + + cm_id_priv = container_of(cm_id, struct cm_id_private, id); + spin_lock_irqsave(&cm_id_priv->lock, flags); + switch (cm_id->state) + { + case IB_CM_REP_SENT: + case IB_CM_MRA_REP_RCVD: + cm_id->state = IB_CM_ESTABLISHED; + break; + case IB_CM_ESTABLISHED: + ret = -EISCONN; + break; + default: + ret = -EINVAL; + break; + } + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + + if (ret) { + kfree(work); + goto out; + } + + /* + * The CM worker thread may try to destroy the cm_id before it + * can execute this work item. To prevent potential deadlock, + * we need to find the cm_id once we're in the context of the + * worker thread, rather than holding a reference on it. + */ + INIT_WORK(&work->work, cm_work_handler, work); + work->local_id = cm_id->local_id; + work->remote_id = cm_id->remote_id; + work->mad_recv_wc = NULL; + work->cm_event.event = IB_CM_USER_ESTABLISHED; + queue_work(cm.wq, &work->work); +out: + return ret; +} +EXPORT_SYMBOL(ib_cm_establish); + +static void cm_recv_handler(struct ib_mad_agent *mad_agent, + struct ib_mad_recv_wc *mad_recv_wc) +{ + struct cm_work *work; + enum ib_cm_event_type event; + int paths = 0; + + switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { + case CM_REQ_ATTR_ID: + paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> + alt_local_lid != 0); + event = IB_CM_REQ_RECEIVED; + break; + case CM_MRA_ATTR_ID: + event = IB_CM_MRA_RECEIVED; + break; + case CM_REJ_ATTR_ID: + event = IB_CM_REJ_RECEIVED; + break; + case CM_REP_ATTR_ID: + event = IB_CM_REP_RECEIVED; + break; + case CM_RTU_ATTR_ID: + event = IB_CM_RTU_RECEIVED; + break; + case CM_DREQ_ATTR_ID: + event = IB_CM_DREQ_RECEIVED; + break; + case CM_DREP_ATTR_ID: + event = IB_CM_DREP_RECEIVED; + break; + case CM_SIDR_REQ_ATTR_ID: + event = IB_CM_SIDR_REQ_RECEIVED; + break; + case CM_SIDR_REP_ATTR_ID: + event = IB_CM_SIDR_REP_RECEIVED; + break; + case CM_LAP_ATTR_ID: + paths = 1; + event = IB_CM_LAP_RECEIVED; + break; + case CM_APR_ATTR_ID: + event = IB_CM_APR_RECEIVED; + break; + default: + ib_free_recv_mad(mad_recv_wc); + return; + } + + work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, + GFP_KERNEL); + if (!work) { + ib_free_recv_mad(mad_recv_wc); + return; + } + + INIT_WORK(&work->work, cm_work_handler, work); + work->cm_event.event = event; + work->mad_recv_wc = mad_recv_wc; + work->port = (struct cm_port *)mad_agent->context; + queue_work(cm.wq, &work->work); +} + +static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, + struct ib_qp_attr *qp_attr, + int *qp_attr_mask) +{ + unsigned long flags; + int ret; + + spin_lock_irqsave(&cm_id_priv->lock, flags); + switch (cm_id_priv->id.state) { + case IB_CM_REQ_SENT: + case IB_CM_MRA_REQ_RCVD: + case IB_CM_REQ_RCVD: + case IB_CM_MRA_REQ_SENT: + case IB_CM_REP_RCVD: + case IB_CM_MRA_REP_SENT: + case IB_CM_REP_SENT: + case IB_CM_MRA_REP_RCVD: + case IB_CM_ESTABLISHED: + *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | + IB_QP_PKEY_INDEX | IB_QP_PORT; + qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE; + if (cm_id_priv->responder_resources) + qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_WRITE | + IB_ACCESS_REMOTE_READ; + qp_attr->pkey_index = cm_id_priv->av.pkey_index; + qp_attr->port_num = cm_id_priv->av.port->port_num; + ret = 0; + break; + default: + ret = -EINVAL; + break; + } + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + return ret; +} + +static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, + struct ib_qp_attr *qp_attr, + int *qp_attr_mask) +{ + unsigned long flags; + int ret; + + spin_lock_irqsave(&cm_id_priv->lock, flags); + switch (cm_id_priv->id.state) { + case IB_CM_REQ_RCVD: + case IB_CM_MRA_REQ_SENT: + case IB_CM_REP_RCVD: + case IB_CM_MRA_REP_SENT: + case IB_CM_REP_SENT: + case IB_CM_MRA_REP_RCVD: + case IB_CM_ESTABLISHED: + *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | + IB_QP_DEST_QPN | IB_QP_RQ_PSN | + IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER; + qp_attr->ah_attr = cm_id_priv->av.ah_attr; + qp_attr->path_mtu = cm_id_priv->path_mtu; + qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); + qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); + qp_attr->max_dest_rd_atomic = cm_id_priv->responder_resources; + qp_attr->min_rnr_timer = 0; + if (cm_id_priv->alt_av.ah_attr.dlid) { + *qp_attr_mask |= IB_QP_ALT_PATH; + qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; + } + ret = 0; + break; + default: + ret = -EINVAL; + break; + } + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + return ret; +} + +static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, + struct ib_qp_attr *qp_attr, + int *qp_attr_mask) +{ + unsigned long flags; + int ret; + + spin_lock_irqsave(&cm_id_priv->lock, flags); + switch (cm_id_priv->id.state) { + case IB_CM_REP_RCVD: + case IB_CM_MRA_REP_SENT: + case IB_CM_REP_SENT: + case IB_CM_MRA_REP_RCVD: + case IB_CM_ESTABLISHED: + *qp_attr_mask = IB_QP_STATE | IB_QP_TIMEOUT | IB_QP_RETRY_CNT | + IB_QP_RNR_RETRY | IB_QP_SQ_PSN | + IB_QP_MAX_QP_RD_ATOMIC; + qp_attr->timeout = cm_id_priv->local_ack_timeout; + qp_attr->retry_cnt = cm_id_priv->retry_count; + qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; + qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); + qp_attr->max_rd_atomic = cm_id_priv->initiator_depth; + if (cm_id_priv->alt_av.ah_attr.dlid) { + *qp_attr_mask |= IB_QP_PATH_MIG_STATE; + qp_attr->path_mig_state = IB_MIG_REARM; + } + ret = 0; + break; + default: + ret = -EINVAL; + break; + } + spin_unlock_irqrestore(&cm_id_priv->lock, flags); + return ret; +} + +int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, + struct ib_qp_attr *qp_attr, + int *qp_attr_mask) +{ + struct cm_id_private *cm_id_priv; + int ret; + + cm_id_priv = container_of(cm_id, struct cm_id_private, id); + switch (qp_attr->qp_state) { + case IB_QPS_INIT: + ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); + break; + case IB_QPS_RTR: + ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); + break; + case IB_QPS_RTS: + ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); + break; + default: + ret = -EINVAL; + break; + } + return ret; +} +EXPORT_SYMBOL(ib_cm_init_qp_attr); + +static u64 cm_get_ca_guid(struct ib_device *device) +{ + struct ib_device_attr *device_attr; + u64 guid; + int ret; + + device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL); + if (!device_attr) + return 0; + + ret = ib_query_device(device, device_attr); + guid = ret ? 0 : device_attr->node_guid; + kfree(device_attr); + return guid; +} + +static void cm_add_one(struct ib_device *device) +{ + struct cm_device *cm_dev; + struct cm_port *port; + struct ib_mad_reg_req reg_req = { + .mgmt_class = IB_MGMT_CLASS_CM, + .mgmt_class_version = IB_CM_CLASS_VERSION + }; + struct ib_port_modify port_modify = { + .set_port_cap_mask = IB_PORT_CM_SUP + }; + unsigned long flags; + int ret; + u8 i; + + cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) * + device->phys_port_cnt, GFP_KERNEL); + if (!cm_dev) + return; + + cm_dev->device = device; + cm_dev->ca_guid = cm_get_ca_guid(device); + if (!cm_dev->ca_guid) + goto error1; + + set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); + for (i = 1; i <= device->phys_port_cnt; i++) { + port = &cm_dev->port[i-1]; + port->cm_dev = cm_dev; + port->port_num = i; + port->mad_agent = ib_register_mad_agent(device, i, + IB_QPT_GSI, + ®_req, + 0, + cm_send_handler, + cm_recv_handler, + port); + if (IS_ERR(port->mad_agent)) + goto error2; + + ret = ib_modify_port(device, i, 0, &port_modify); + if (ret) + goto error3; + } + ib_set_client_data(device, &cm_client, cm_dev); + + write_lock_irqsave(&cm.device_lock, flags); + list_add_tail(&cm_dev->list, &cm.device_list); + write_unlock_irqrestore(&cm.device_lock, flags); + return; + +error3: + ib_unregister_mad_agent(port->mad_agent); +error2: + port_modify.set_port_cap_mask = 0; + port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; + while (--i) { + port = &cm_dev->port[i-1]; + ib_modify_port(device, port->port_num, 0, &port_modify); + ib_unregister_mad_agent(port->mad_agent); + } +error1: + kfree(cm_dev); +} + +static void cm_remove_one(struct ib_device *device) +{ + struct cm_device *cm_dev; + struct cm_port *port; + struct ib_port_modify port_modify = { + .clr_port_cap_mask = IB_PORT_CM_SUP + }; + unsigned long flags; + int i; + + cm_dev = ib_get_client_data(device, &cm_client); + if (!cm_dev) + return; + + write_lock_irqsave(&cm.device_lock, flags); + list_del(&cm_dev->list); + write_unlock_irqrestore(&cm.device_lock, flags); + + for (i = 1; i <= device->phys_port_cnt; i++) { + port = &cm_dev->port[i-1]; + ib_modify_port(device, port->port_num, 0, &port_modify); + ib_unregister_mad_agent(port->mad_agent); + } + kfree(cm_dev); +} + +static int __init ib_cm_init(void) +{ + int ret; + + memset(&cm, 0, sizeof cm); + INIT_LIST_HEAD(&cm.device_list); + rwlock_init(&cm.device_lock); + spin_lock_init(&cm.lock); + cm.listen_service_table = RB_ROOT; + cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); + cm.remote_id_table = RB_ROOT; + cm.remote_qp_table = RB_ROOT; + cm.remote_sidr_table = RB_ROOT; + idr_init(&cm.local_id_table); + idr_pre_get(&cm.local_id_table, GFP_KERNEL); + + cm.wq = create_workqueue("ib_cm"); + if (!cm.wq) + return -ENOMEM; + + ret = ib_register_client(&cm_client); + if (ret) + goto error; + + return 0; +error: + destroy_workqueue(cm.wq); + return ret; +} + +static void __exit ib_cm_cleanup(void) +{ + flush_workqueue(cm.wq); + destroy_workqueue(cm.wq); + ib_unregister_client(&cm_client); +} + +module_init(ib_cm_init); +module_exit(ib_cm_cleanup); + diff --git a/drivers/infiniband/core/cm_msgs.h b/drivers/infiniband/core/cm_msgs.h new file mode 100644 index 00000000000..15a309a77b2 --- /dev/null +++ b/drivers/infiniband/core/cm_msgs.h @@ -0,0 +1,819 @@ +/* + * Copyright (c) 2004 Intel Corporation. All rights reserved. + * Copyright (c) 2004 Topspin Corporation. All rights reserved. + * Copyright (c) 2004 Voltaire Corporation. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING the madirectory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use source and binary forms, with or + * withmodification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retathe above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHWARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS THE + * SOFTWARE. + */ +#if !defined(CM_MSGS_H) +#define CM_MSGS_H + +#include <ib_mad.h> + +/* + * Parameters to routines below should be in network-byte order, and values + * are returned in network-byte order. + */ + +#define IB_CM_CLASS_VERSION 2 /* IB specification 1.2 */ + +enum cm_msg_attr_id { + CM_REQ_ATTR_ID = __constant_htons(0x0010), + CM_MRA_ATTR_ID = __constant_htons(0x0011), + CM_REJ_ATTR_ID = __constant_htons(0x0012), + CM_REP_ATTR_ID = __constant_htons(0x0013), + CM_RTU_ATTR_ID = __constant_htons(0x0014), + CM_DREQ_ATTR_ID = __constant_htons(0x0015), + CM_DREP_ATTR_ID = __constant_htons(0x0016), + CM_SIDR_REQ_ATTR_ID = __constant_htons(0x0017), + CM_SIDR_REP_ATTR_ID = __constant_htons(0x0018), + CM_LAP_ATTR_ID = __constant_htons(0x0019), + CM_APR_ATTR_ID = __constant_htons(0x001A) +}; + +enum cm_msg_sequence { + CM_MSG_SEQUENCE_REQ, + CM_MSG_SEQUENCE_LAP, + CM_MSG_SEQUENCE_DREQ, + CM_MSG_SEQUENCE_SIDR +}; + +struct cm_req_msg { + struct ib_mad_hdr hdr; + + u32 local_comm_id; + u32 rsvd4; + u64 service_id; + u64 local_ca_guid; + u32 rsvd24; + u32 local_qkey; + /* local QPN:24, responder resources:8 */ + u32 offset32; + /* local EECN:24, initiator depth:8 */ + u32 offset36; + /* + * remote EECN:24, remote CM response timeout:5, + * transport service type:2, end-to-end flow control:1 + */ + u32 offset40; + /* starting PSN:24, local CM response timeout:5, retry count:3 */ + u32 offset44; + u16 pkey; + /* path MTU:4, RDC exists:1, RNR retry count:3. */ + u8 offset50; + /* max CM Retries:4, SRQ:1, rsvd:3 */ + u8 offset51; + + u16 primary_local_lid; + u16 primary_remote_lid; + union ib_gid primary_local_gid; + union ib_gid primary_remote_gid; + /* flow label:20, rsvd:6, packet rate:6 */ + u32 primary_offset88; + u8 primary_traffic_class; + u8 primary_hop_limit; + /* SL:4, subnet local:1, rsvd:3 */ + u8 primary_offset94; + /* local ACK timeout:5, rsvd:3 */ + u8 primary_offset95; + + u16 alt_local_lid; + u16 alt_remote_lid; + union ib_gid alt_local_gid; + union ib_gid alt_remote_gid; + /* flow label:20, rsvd:6, packet rate:6 */ + u32 alt_offset132; + u8 alt_traffic_class; + u8 alt_hop_limit; + /* SL:4, subnet local:1, rsvd:3 */ + u8 alt_offset138; + /* local ACK timeout:5, rsvd:3 */ + u8 alt_offset139; + + u8 private_data[IB_CM_REQ_PRIVATE_DATA_SIZE]; + +} __attribute__ ((packed)); + +static inline u32 cm_req_get_local_qpn(struct cm_req_msg *req_msg) +{ + return cpu_to_be32(be32_to_cpu(req_msg->offset32) >> 8); +} + +static inline void cm_req_set_local_qpn(struct cm_req_msg *req_msg, u32 qpn) +{ + req_msg->offset32 = cpu_to_be32((be32_to_cpu(qpn) << 8) | + (be32_to_cpu(req_msg->offset32) & + 0x000000FF)); +} + +static inline u8 cm_req_get_resp_res(struct cm_req_msg *req_msg) +{ + return (u8) be32_to_cpu(req_msg->offset32); +} + +static inline void cm_req_set_resp_res(struct cm_req_msg *req_msg, u8 resp_res) +{ + req_msg->offset32 = cpu_to_be32(resp_res | + (be32_to_cpu(req_msg->offset32) & + 0xFFFFFF00)); +} + +static inline u8 cm_req_get_init_depth(struct cm_req_msg *req_msg) +{ + return (u8) be32_to_cpu(req_msg->offset36); +} + +static inline void cm_req_set_init_depth(struct cm_req_msg *req_msg, + u8 init_depth) +{ + req_msg->offset36 = cpu_to_be32(init_depth | + (be32_to_cpu(req_msg->offset36) & + 0xFFFFFF00)); +} + +static inline u8 cm_req_get_remote_resp_timeout(struct cm_req_msg *req_msg) +{ + return (u8) ((be32_to_cpu(req_msg->offset40) & 0xF8) >> 3); +} + +static inline void cm_req_set_remote_resp_timeout(struct cm_req_msg *req_msg, + u8 resp_timeout) +{ + req_msg->offset40 = cpu_to_be32((resp_timeout << 3) | + (be32_to_cpu(req_msg->offset40) & + 0xFFFFFF07)); +} + +static inline enum ib_qp_type cm_req_get_qp_type(struct cm_req_msg *req_msg) +{ + u8 transport_type = (u8) (be32_to_cpu(req_msg->offset40) & 0x06) >> 1; + switch(transport_type) { + case 0: return IB_QPT_RC; + case 1: return IB_QPT_UC; + default: return 0; + } +} + +static inline void cm_req_set_qp_type(struct cm_req_msg *req_msg, + enum ib_qp_type qp_type) +{ + switch(qp_type) { + case IB_QPT_UC: + req_msg->offset40 = cpu_to_be32((be32_to_cpu( + req_msg->offset40) & + 0xFFFFFFF9) | 0x2); + default: + req_msg->offset40 = cpu_to_be32(be32_to_cpu( + req_msg->offset40) & + 0xFFFFFFF9); + } +} + +static inline u8 cm_req_get_flow_ctrl(struct cm_req_msg *req_msg) +{ + return be32_to_cpu(req_msg->offset40) & 0x1; +} + +static inline void cm_req_set_flow_ctrl(struct cm_req_msg *req_msg, + u8 flow_ctrl) +{ + req_msg->offset40 = cpu_to_be32((flow_ctrl & 0x1) | + (be32_to_cpu(req_msg->offset40) & + 0xFFFFFFFE)); +} + +static inline u32 cm_req_get_starting_psn(struct cm_req_msg *req_msg) +{ + return cpu_to_be32(be32_to_cpu(req_msg->offset44) >> 8); +} + +static inline void cm_req_set_starting_psn(struct cm_req_msg *req_msg, + u32 starting_psn) +{ + req_msg->offset44 = cpu_to_be32((be32_to_cpu(starting_psn) << 8) | + (be32_to_cpu(req_msg->offset44) & 0x000000FF)); +} + +static inline u8 cm_req_get_local_resp_timeout(struct cm_req_msg *req_msg) +{ + return (u8) ((be32_to_cpu(req_msg->offset44) & 0xF8) >> 3); +} + +static inline void cm_req_set_local_resp_timeout(struct cm_req_msg *req_msg, + u8 resp_timeout) +{ + req_msg->offset44 = cpu_to_be32((resp_timeout << 3) | + (be32_to_cpu(req_msg->offset44) & 0xFFFFFF07)); +} + +static inline u8 cm_req_get_retry_count(struct cm_req_msg *req_msg) +{ + return (u8) (be32_to_cpu(req_msg->offset44) & 0x7); +} + +static inline void cm_req_set_retry_count(struct cm_req_msg *req_msg, + u8 retry_count) +{ + req_msg->offset44 = cpu_to_be32((retry_count & 0x7) | + (be32_to_cpu(req_msg->offset44) & 0xFFFFFFF8)); +} + +static inline u8 cm_req_get_path_mtu(struct cm_req_msg *req_msg) +{ + return req_msg->offset50 >> 4; +} + +static inline void cm_req_set_path_mtu(struct cm_req_msg *req_msg, u8 path_mtu) +{ + req_msg->offset50 = (u8) ((req_msg->offset50 & 0xF) | (path_mtu << 4)); +} + +static inline u8 cm_req_get_rnr_retry_count(struct cm_req_msg *req_msg) +{ + return req_msg->offset50 & 0x7; +} + +static inline void cm_req_set_rnr_retry_count(struct cm_req_msg *req_msg, + u8 rnr_retry_count) +{ + req_msg->offset50 = (u8) ((req_msg->offset50 & 0xF8) | + (rnr_retry_count & 0x7)); +} + +static inline u8 cm_req_get_max_cm_retries(struct cm_req_msg *req_msg) +{ + return req_msg->offset51 >> 4; +} + +static inline void cm_req_set_max_cm_retries(struct cm_req_msg *req_msg, + u8 retries) +{ + req_msg->offset51 = (u8) ((req_msg->offset51 & 0xF) | (retries << 4)); +} + +static inline u8 cm_req_get_srq(struct cm_req_msg *req_msg) +{ + return (req_msg->offset51 & 0x8) >> 3; +} + +static inline void cm_req_set_srq(struct cm_req_msg *req_msg, u8 srq) +{ + req_msg->offset51 = (u8) ((req_msg->offset51 & 0xF7) | + ((srq & 0x1) << 3)); +} + +static inline u32 cm_req_get_primary_flow_label(struct cm_req_msg *req_msg) +{ + return cpu_to_be32((be32_to_cpu(req_msg->primary_offset88) >> 12)); +} + +static inline void cm_req_set_primary_flow_label(struct cm_req_msg *req_msg, + u32 flow_label) +{ + req_msg->primary_offset88 = cpu_to_be32( + (be32_to_cpu(req_msg->primary_offset88) & + 0x00000FFF) | + (be32_to_cpu(flow_label) << 12)); +} + +static inline u8 cm_req_get_primary_packet_rate(struct cm_req_msg *req_msg) +{ + return (u8) (be32_to_cpu(req_msg->primary_offset88) & 0x3F); +} + +static inline void cm_req_set_primary_packet_rate(struct cm_req_msg *req_msg, + u8 rate) +{ + req_msg->primary_offset88 = cpu_to_be32( + (be32_to_cpu(req_msg->primary_offset88) & + 0xFFFFFFC0) | (rate & 0x3F)); +} + +static inline u8 cm_req_get_primary_sl(struct cm_req_msg *req_msg) +{ + return (u8) (req_msg->primary_offset94 >> 4); +} + +static inline void cm_req_set_primary_sl(struct cm_req_msg *req_msg, u8 sl) +{ + req_msg->primary_offset94 = (u8) ((req_msg->primary_offset94 & 0x0F) | + (sl << 4)); +} + +static inline u8 cm_req_get_primary_subnet_local(struct cm_req_msg *req_msg) +{ + return (u8) ((req_msg->primary_offset94 & 0x08) >> 3); +} + +static inline void cm_req_set_primary_subnet_local(struct cm_req_msg *req_msg, + u8 subnet_local) +{ + req_msg->primary_offset94 = (u8) ((req_msg->primary_offset94 & 0xF7) | + ((subnet_local & 0x1) << 3)); +} + +static inline u8 cm_req_get_primary_local_ack_timeout(struct cm_req_msg *req_msg) +{ + return (u8) (req_msg->primary_offset95 >> 3); +} + +static inline void cm_req_set_primary_local_ack_timeout(struct cm_req_msg *req_msg, + u8 local_ack_timeout) +{ + req_msg->primary_offset95 = (u8) ((req_msg->primary_offset95 & 0x07) | + (local_ack_timeout << 3)); +} + +static inline u32 cm_req_get_alt_flow_label(struct cm_req_msg *req_msg) +{ + return cpu_to_be32((be32_to_cpu(req_msg->alt_offset132) >> 12)); +} + +static inline void cm_req_set_alt_flow_label(struct cm_req_msg *req_msg, + u32 flow_label) +{ + req_msg->alt_offset132 = cpu_to_be32( + (be32_to_cpu(req_msg->alt_offset132) & + 0x00000FFF) | + (be32_to_cpu(flow_label) << 12)); +} + +static inline u8 cm_req_get_alt_packet_rate(struct cm_req_msg *req_msg) +{ + return (u8) (be32_to_cpu(req_msg->alt_offset132) & 0x3F); +} + +static inline void cm_req_set_alt_packet_rate(struct cm_req_msg *req_msg, + u8 rate) +{ + req_msg->alt_offset132 = cpu_to_be32( + (be32_to_cpu(req_msg->alt_offset132) & + 0xFFFFFFC0) | (rate & 0x3F)); +} + +static inline u8 cm_req_get_alt_sl(struct cm_req_msg *req_msg) +{ + return (u8) (req_msg->alt_offset138 >> 4); +} + +static inline void cm_req_set_alt_sl(struct cm_req_msg *req_msg, u8 sl) +{ + req_msg->alt_offset138 = (u8) ((req_msg->alt_offset138 & 0x0F) | + (sl << 4)); +} + +static inline u8 cm_req_get_alt_subnet_local(struct cm_req_msg *req_msg) +{ + return (u8) ((req_msg->alt_offset138 & 0x08) >> 3); +} + +static inline void cm_req_set_alt_subnet_local(struct cm_req_msg *req_msg, + u8 subnet_local) +{ + req_msg->alt_offset138 = (u8) ((req_msg->alt_offset138 & 0xF7) | + ((subnet_local & 0x1) << 3)); +} + +static inline u8 cm_req_get_alt_local_ack_timeout(struct cm_req_msg *req_msg) +{ + return (u8) (req_msg->alt_offset139 >> 3); +} + +static inline void cm_req_set_alt_local_ack_timeout(struct cm_req_msg *req_msg, + u8 local_ack_timeout) +{ + req_msg->alt_offset139 = (u8) ((req_msg->alt_offset139 & 0x07) | + (local_ack_timeout << 3)); +} + +/* Message REJected or MRAed */ +enum cm_msg_response { + CM_MSG_RESPONSE_REQ = 0x0, + CM_MSG_RESPONSE_REP = 0x1, + CM_MSG_RESPONSE_OTHER = 0x2 +}; + + struct cm_mra_msg { + struct ib_mad_hdr hdr; + + u32 local_comm_id; + u32 remote_comm_id; + /* message MRAed:2, rsvd:6 */ + u8 offset8; + /* service timeout:5, rsvd:3 */ + u8 offset9; + + u8 private_data[IB_CM_MRA_PRIVATE_DATA_SIZE]; + +} __attribute__ ((packed)); + +static inline u8 cm_mra_get_msg_mraed(struct cm_mra_msg *mra_msg) +{ + return (u8) (mra_msg->offset8 >> 6); +} + +static inline void cm_mra_set_msg_mraed(struct cm_mra_msg *mra_msg, u8 msg) +{ + mra_msg->offset8 = (u8) ((mra_msg->offset8 & 0x3F) | (msg << 6)); +} + +static inline u8 cm_mra_get_service_timeout(struct cm_mra_msg *mra_msg) +{ + return (u8) (mra_msg->offset9 >> 3); +} + +static inline void cm_mra_set_service_timeout(struct cm_mra_msg *mra_msg, + u8 service_timeout) +{ + mra_msg->offset9 = (u8) ((mra_msg->offset9 & 0x07) | + (service_timeout << 3)); +} + +struct cm_rej_msg { + struct ib_mad_hdr hdr; + + u32 local_comm_id; + u32 remote_comm_id; + /* message REJected:2, rsvd:6 */ + u8 offset8; + /* reject info length:7, rsvd:1. */ + u8 offset9; + u16 reason; + u8 ari[IB_CM_REJ_ARI_LENGTH]; + + u8 private_data[IB_CM_REJ_PRIVATE_DATA_SIZE]; + +} __attribute__ ((packed)); + +static inline u8 cm_rej_get_msg_rejected(struct cm_rej_msg *rej_msg) +{ + return (u8) (rej_msg->offset8 >> 6); +} + +static inline void cm_rej_set_msg_rejected(struct cm_rej_msg *rej_msg, u8 msg) +{ + rej_msg->offset8 = (u8) ((rej_msg->offset8 & 0x3F) | (msg << 6)); +} + +static inline u8 cm_rej_get_reject_info_len(struct cm_rej_msg *rej_msg) +{ + return (u8) (rej_msg->offset9 >> 1); +} + +static inline void cm_rej_set_reject_info_len(struct cm_rej_msg *rej_msg, + u8 len) +{ + rej_msg->offset9 = (u8) ((rej_msg->offset9 & 0x1) | (len << 1)); +} + +struct cm_rep_msg { + struct ib_mad_hdr hdr; + + u32 local_comm_id; + u32 remote_comm_id; + u32 local_qkey; + /* local QPN:24, rsvd:8 */ + u32 offset12; + /* local EECN:24, rsvd:8 */ + u32 offset16; + /* starting PSN:24 rsvd:8 */ + u32 offset20; + u8 resp_resources; + u8 initiator_depth; + /* target ACK delay:5, failover accepted:2, end-to-end flow control:1 */ + u8 offset26; + /* RNR retry count:3, SRQ:1, rsvd:5 */ + u8 offset27; + u64 local_ca_guid; + + u8 private_data[IB_CM_REP_PRIVATE_DATA_SIZE]; + +} __attribute__ ((packed)); + +static inline u32 cm_rep_get_local_qpn(struct cm_rep_msg *rep_msg) +{ + return cpu_to_be32(be32_to_cpu(rep_msg->offset12) >> 8); +} + +static inline void cm_rep_set_local_qpn(struct cm_rep_msg *rep_msg, u32 qpn) +{ + rep_msg->offset12 = cpu_to_be32((be32_to_cpu(qpn) << 8) | + (be32_to_cpu(rep_msg->offset12) & 0x000000FF)); +} + +static inline u32 cm_rep_get_starting_psn(struct cm_rep_msg *rep_msg) +{ + return cpu_to_be32(be32_to_cpu(rep_msg->offset20) >> 8); +} + +static inline void cm_rep_set_starting_psn(struct cm_rep_msg *rep_msg, + u32 starting_psn) +{ + rep_msg->offset20 = cpu_to_be32((be32_to_cpu(starting_psn) << 8) | + (be32_to_cpu(rep_msg->offset20) & 0x000000FF)); +} + +static inline u8 cm_rep_get_target_ack_delay(struct cm_rep_msg *rep_msg) +{ + return (u8) (rep_msg->offset26 >> 3); +} + +static inline void cm_rep_set_target_ack_delay(struct cm_rep_msg *rep_msg, + u8 target_ack_delay) +{ + rep_msg->offset26 = (u8) ((rep_msg->offset26 & 0x07) | + (target_ack_delay << 3)); +} + +static inline u8 cm_rep_get_failover(struct cm_rep_msg *rep_msg) +{ + return (u8) ((rep_msg->offset26 & 0x06) >> 1); +} + +static inline void cm_rep_set_failover(struct cm_rep_msg *rep_msg, u8 failover) +{ + rep_msg->offset26 = (u8) ((rep_msg->offset26 & 0xF9) | + ((failover & 0x3) << 1)); +} + +static inline u8 cm_rep_get_flow_ctrl(struct cm_rep_msg *rep_msg) +{ + return (u8) (rep_msg->offset26 & 0x01); +} + +static inline void cm_rep_set_flow_ctrl(struct cm_rep_msg *rep_msg, + u8 flow_ctrl) +{ + rep_msg->offset26 = (u8) ((rep_msg->offset26 & 0xFE) | + (flow_ctrl & 0x1)); +} + +static inline u8 cm_rep_get_rnr_retry_count(struct cm_rep_msg *rep_msg) +{ + return (u8) (rep_msg->offset27 >> 5); +} + +static inline void cm_rep_set_rnr_retry_count(struct cm_rep_msg *rep_msg, + u8 rnr_retry_count) +{ + rep_msg->offset27 = (u8) ((rep_msg->offset27 & 0x1F) | + (rnr_retry_count << 5)); +} + +static inline u8 cm_rep_get_srq(struct cm_rep_msg *rep_msg) +{ + return (u8) ((rep_msg->offset27 >> 4) & 0x1); +} + +static inline void cm_rep_set_srq(struct cm_rep_msg *rep_msg, u8 srq) +{ + rep_msg->offset27 = (u8) ((rep_msg->offset27 & 0xEF) | + ((srq & 0x1) << 4)); +} + +struct cm_rtu_msg { + struct ib_mad_hdr hdr; + + u32 local_comm_id; + u32 remote_comm_id; + + u8 private_data[IB_CM_RTU_PRIVATE_DATA_SIZE]; + +} __attribute__ ((packed)); + +struct cm_dreq_msg { + struct ib_mad_hdr hdr; + + u32 local_comm_id; + u32 remote_comm_id; + /* remote QPN/EECN:24, rsvd:8 */ + u32 offset8; + + u8 private_data[IB_CM_DREQ_PRIVATE_DATA_SIZE]; + +} __attribute__ ((packed)); + +static inline u32 cm_dreq_get_remote_qpn(struct cm_dreq_msg *dreq_msg) +{ + return cpu_to_be32(be32_to_cpu(dreq_msg->offset8) >> 8); +} + +static inline void cm_dreq_set_remote_qpn(struct cm_dreq_msg *dreq_msg, u32 qpn) +{ + dreq_msg->offset8 = cpu_to_be32((be32_to_cpu(qpn) << 8) | + (be32_to_cpu(dreq_msg->offset8) & 0x000000FF)); +} + +struct cm_drep_msg { + struct ib_mad_hdr hdr; + + u32 local_comm_id; + u32 remote_comm_id; + + u8 private_data[IB_CM_DREP_PRIVATE_DATA_SIZE]; + +} __attribute__ ((packed)); + +struct cm_lap_msg { + struct ib_mad_hdr hdr; + + u32 local_comm_id; + u32 remote_comm_id; + + u32 rsvd8; + /* remote QPN/EECN:24, remote CM response timeout:5, rsvd:3 */ + u32 offset12; + u32 rsvd16; + + u16 alt_local_lid; + u16 alt_remote_lid; + union ib_gid alt_local_gid; + union ib_gid alt_remote_gid; + /* flow label:20, rsvd:4, traffic class:8 */ + u32 offset56; + u8 alt_hop_limit; + /* rsvd:2, packet rate:6 */ + uint8_t offset61; + /* SL:4, subnet local:1, rsvd:3 */ + uint8_t offset62; + /* local ACK timeout:5, rsvd:3 */ + uint8_t offset63; + + u8 private_data[IB_CM_LAP_PRIVATE_DATA_SIZE]; +} __attribute__ ((packed)); + +static inline u32 cm_lap_get_remote_qpn(struct cm_lap_msg *lap_msg) +{ + return cpu_to_be32(be32_to_cpu(lap_msg->offset12) >> 8); +} + +static inline void cm_lap_set_remote_qpn(struct cm_lap_msg *lap_msg, u32 qpn) +{ + lap_msg->offset12 = cpu_to_be32((be32_to_cpu(qpn) << 8) | + (be32_to_cpu(lap_msg->offset12) & + 0x000000FF)); +} + +static inline u8 cm_lap_get_remote_resp_timeout(struct cm_lap_msg *lap_msg) +{ + return (u8) ((be32_to_cpu(lap_msg->offset12) & 0xF8) >> 3); +} + +static inline void cm_lap_set_remote_resp_timeout(struct cm_lap_msg *lap_msg, + u8 resp_timeout) +{ + lap_msg->offset12 = cpu_to_be32((resp_timeout << 3) | + (be32_to_cpu(lap_msg->offset12) & + 0xFFFFFF07)); +} + +static inline u32 cm_lap_get_flow_label(struct cm_lap_msg *lap_msg) +{ + return be32_to_cpu(lap_msg->offset56) >> 12; +} + +static inline void cm_lap_set_flow_label(struct cm_lap_msg *lap_msg, + u32 flow_label) +{ + lap_msg->offset56 = cpu_to_be32((flow_label << 12) | + (be32_to_cpu(lap_msg->offset56) & + 0x00000FFF)); +} + +static inline u8 cm_lap_get_traffic_class(struct cm_lap_msg *lap_msg) +{ + return (u8) be32_to_cpu(lap_msg->offset56); +} + +static inline void cm_lap_set_traffic_class(struct cm_lap_msg *lap_msg, + u8 traffic_class) +{ + lap_msg->offset56 = cpu_to_be32(traffic_class | + (be32_to_cpu(lap_msg->offset56) & + 0xFFFFFF00)); +} + +static inline u8 cm_lap_get_packet_rate(struct cm_lap_msg *lap_msg) +{ + return lap_msg->offset61 & 0x3F; +} + +static inline void cm_lap_set_packet_rate(struct cm_lap_msg *lap_msg, + u8 packet_rate) +{ + lap_msg->offset61 = (packet_rate & 0x3F) | (lap_msg->offset61 & 0xC0); +} + +static inline u8 cm_lap_get_sl(struct cm_lap_msg *lap_msg) +{ + return lap_msg->offset62 >> 4; +} + +static inline void cm_lap_set_sl(struct cm_lap_msg *lap_msg, u8 sl) +{ + lap_msg->offset62 = (sl << 4) | (lap_msg->offset62 & 0x0F); +} + +static inline u8 cm_lap_get_subnet_local(struct cm_lap_msg *lap_msg) +{ + return (lap_msg->offset62 >> 3) & 0x1; +} + +static inline void cm_lap_set_subnet_local(struct cm_lap_msg *lap_msg, + u8 subnet_local) +{ + lap_msg->offset62 = ((subnet_local & 0x1) << 3) | + (lap_msg->offset61 & 0xF7); +} +static inline u8 cm_lap_get_local_ack_timeout(struct cm_lap_msg *lap_msg) +{ + return lap_msg->offset63 >> 3; +} + +static inline void cm_lap_set_local_ack_timeout(struct cm_lap_msg *lap_msg, + u8 local_ack_timeout) +{ + lap_msg->offset63 = (local_ack_timeout << 3) | + (lap_msg->offset63 & 0x07); +} + +struct cm_apr_msg { + struct ib_mad_hdr hdr; + + u32 local_comm_id; + u32 remote_comm_id; + + u8 info_length; + u8 ap_status; + u8 info[IB_CM_APR_INFO_LENGTH]; + + u8 private_data[IB_CM_APR_PRIVATE_DATA_SIZE]; +} __attribute__ ((packed)); + +struct cm_sidr_req_msg { + struct ib_mad_hdr hdr; + + u32 request_id; + u16 pkey; + u16 rsvd; + u64 service_id; + + u8 private_data[IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE]; +} __attribute__ ((packed)); + +struct cm_sidr_rep_msg { + struct ib_mad_hdr hdr; + + u32 request_id; + u8 status; + u8 info_length; + u16 rsvd; + /* QPN:24, rsvd:8 */ + u32 offset8; + u64 service_id; + u32 qkey; + u8 info[IB_CM_SIDR_REP_INFO_LENGTH]; + + u8 private_data[IB_CM_SIDR_REP_PRIVATE_DATA_SIZE]; +} __attribute__ ((packed)); + +static inline u32 cm_sidr_rep_get_qpn(struct cm_sidr_rep_msg *sidr_rep_msg) +{ + return cpu_to_be32(be32_to_cpu(sidr_rep_msg->offset8) >> 8); +} + +static inline void cm_sidr_rep_set_qpn(struct cm_sidr_rep_msg *sidr_rep_msg, + u32 qpn) +{ + sidr_rep_msg->offset8 = cpu_to_be32((be32_to_cpu(qpn) << 8) | + (be32_to_cpu(sidr_rep_msg->offset8) & + 0x000000FF)); +} + +#endif /* CM_MSGS_H */ |