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authorDavid Gibson <david@gibson.dropbear.id.au>2005-11-10 12:42:17 +1100
committerPaul Mackerras <paulus@samba.org>2005-11-10 13:09:27 +1100
commitf6d3577da14e877b79517c883d1139ee6ad7da45 (patch)
treed1ac8bc6dc184ec44683fca01826f5794d5d92b1 /arch/ppc64/kernel
parent26ef5c09576496dfd08d2b36ec1d08a6f917a0eb (diff)
[PATCH] powerpc: Move scanlog.c to platforms/pseries
scanlog.c is only compiled on pSeries. Thus, this patch moves it to platforms/pseries. Built and booted on pSeries LPAR (ARCH=powerpc and ARCH=ppc64). Built for iSeries (ARCH=powerpc). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/ppc64/kernel')
-rw-r--r--arch/ppc64/kernel/Makefile1
-rw-r--r--arch/ppc64/kernel/scanlog.c235
2 files changed, 0 insertions, 236 deletions
diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile
index 1f71f23cc26..048ba910f02 100644
--- a/arch/ppc64/kernel/Makefile
+++ b/arch/ppc64/kernel/Makefile
@@ -36,7 +36,6 @@ ifneq ($(CONFIG_PPC_MERGE),y)
obj-$(CONFIG_MODULES) += ppc_ksyms.o
endif
obj-$(CONFIG_PPC_RTAS) += rtas_pci.o
-obj-$(CONFIG_SCANLOG) += scanlog.o
obj-$(CONFIG_LPARCFG) += lparcfg.o
obj-$(CONFIG_HVC_CONSOLE) += hvconsole.o
ifneq ($(CONFIG_PPC_MERGE),y)
diff --git a/arch/ppc64/kernel/scanlog.c b/arch/ppc64/kernel/scanlog.c
deleted file mode 100644
index 2edc947f7c4..00000000000
--- a/arch/ppc64/kernel/scanlog.c
+++ /dev/null
@@ -1,235 +0,0 @@
-/*
- * c 2001 PPC 64 Team, IBM Corp
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * scan-log-data driver for PPC64 Todd Inglett <tinglett@vnet.ibm.com>
- *
- * When ppc64 hardware fails the service processor dumps internal state
- * of the system. After a reboot the operating system can access a dump
- * of this data using this driver. A dump exists if the device-tree
- * /chosen/ibm,scan-log-data property exists.
- *
- * This driver exports /proc/ppc64/scan-log-dump which can be read.
- * The driver supports only sequential reads.
- *
- * The driver looks at a write to the driver for the single word "reset".
- * If given, the driver will reset the scanlog so the platform can free it.
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/proc_fs.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <asm/uaccess.h>
-#include <asm/rtas.h>
-#include <asm/prom.h>
-
-#define MODULE_VERS "1.0"
-#define MODULE_NAME "scanlog"
-
-/* Status returns from ibm,scan-log-dump */
-#define SCANLOG_COMPLETE 0
-#define SCANLOG_HWERROR -1
-#define SCANLOG_CONTINUE 1
-
-#define DEBUG(A...) do { if (scanlog_debug) printk(KERN_ERR "scanlog: " A); } while (0)
-
-static int scanlog_debug;
-static unsigned int ibm_scan_log_dump; /* RTAS token */
-static struct proc_dir_entry *proc_ppc64_scan_log_dump; /* The proc file */
-
-static ssize_t scanlog_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
-{
- struct inode * inode = file->f_dentry->d_inode;
- struct proc_dir_entry *dp;
- unsigned int *data;
- int status;
- unsigned long len, off;
- unsigned int wait_time;
-
- dp = PDE(inode);
- data = (unsigned int *)dp->data;
-
- if (!data) {
- printk(KERN_ERR "scanlog: read failed no data\n");
- return -EIO;
- }
-
- if (count > RTAS_DATA_BUF_SIZE)
- count = RTAS_DATA_BUF_SIZE;
-
- if (count < 1024) {
- /* This is the min supported by this RTAS call. Rather
- * than do all the buffering we insist the user code handle
- * larger reads. As long as cp works... :)
- */
- printk(KERN_ERR "scanlog: cannot perform a small read (%ld)\n", count);
- return -EINVAL;
- }
-
- if (!access_ok(VERIFY_WRITE, buf, count))
- return -EFAULT;
-
- for (;;) {
- wait_time = 500; /* default wait if no data */
- spin_lock(&rtas_data_buf_lock);
- memcpy(rtas_data_buf, data, RTAS_DATA_BUF_SIZE);
- status = rtas_call(ibm_scan_log_dump, 2, 1, NULL,
- (u32) __pa(rtas_data_buf), (u32) count);
- memcpy(data, rtas_data_buf, RTAS_DATA_BUF_SIZE);
- spin_unlock(&rtas_data_buf_lock);
-
- DEBUG("status=%d, data[0]=%x, data[1]=%x, data[2]=%x\n",
- status, data[0], data[1], data[2]);
- switch (status) {
- case SCANLOG_COMPLETE:
- DEBUG("hit eof\n");
- return 0;
- case SCANLOG_HWERROR:
- DEBUG("hardware error reading scan log data\n");
- return -EIO;
- case SCANLOG_CONTINUE:
- /* We may or may not have data yet */
- len = data[1];
- off = data[2];
- if (len > 0) {
- if (copy_to_user(buf, ((char *)data)+off, len))
- return -EFAULT;
- return len;
- }
- /* Break to sleep default time */
- break;
- default:
- if (status > 9900 && status <= 9905) {
- wait_time = rtas_extended_busy_delay_time(status);
- } else {
- printk(KERN_ERR "scanlog: unknown error from rtas: %d\n", status);
- return -EIO;
- }
- }
- /* Apparently no data yet. Wait and try again. */
- msleep_interruptible(wait_time);
- }
- /*NOTREACHED*/
-}
-
-static ssize_t scanlog_write(struct file * file, const char __user * buf,
- size_t count, loff_t *ppos)
-{
- char stkbuf[20];
- int status;
-
- if (count > 19) count = 19;
- if (copy_from_user (stkbuf, buf, count)) {
- return -EFAULT;
- }
- stkbuf[count] = 0;
-
- if (buf) {
- if (strncmp(stkbuf, "reset", 5) == 0) {
- DEBUG("reset scanlog\n");
- status = rtas_call(ibm_scan_log_dump, 2, 1, NULL, 0, 0);
- DEBUG("rtas returns %d\n", status);
- } else if (strncmp(stkbuf, "debugon", 7) == 0) {
- printk(KERN_ERR "scanlog: debug on\n");
- scanlog_debug = 1;
- } else if (strncmp(stkbuf, "debugoff", 8) == 0) {
- printk(KERN_ERR "scanlog: debug off\n");
- scanlog_debug = 0;
- }
- }
- return count;
-}
-
-static int scanlog_open(struct inode * inode, struct file * file)
-{
- struct proc_dir_entry *dp = PDE(inode);
- unsigned int *data = (unsigned int *)dp->data;
-
- if (!data) {
- printk(KERN_ERR "scanlog: open failed no data\n");
- return -EIO;
- }
-
- if (data[0] != 0) {
- /* This imperfect test stops a second copy of the
- * data (or a reset while data is being copied)
- */
- return -EBUSY;
- }
-
- data[0] = 0; /* re-init so we restart the scan */
-
- return 0;
-}
-
-static int scanlog_release(struct inode * inode, struct file * file)
-{
- struct proc_dir_entry *dp = PDE(inode);
- unsigned int *data = (unsigned int *)dp->data;
-
- if (!data) {
- printk(KERN_ERR "scanlog: release failed no data\n");
- return -EIO;
- }
- data[0] = 0;
-
- return 0;
-}
-
-struct file_operations scanlog_fops = {
- .owner = THIS_MODULE,
- .read = scanlog_read,
- .write = scanlog_write,
- .open = scanlog_open,
- .release = scanlog_release,
-};
-
-int __init scanlog_init(void)
-{
- struct proc_dir_entry *ent;
-
- ibm_scan_log_dump = rtas_token("ibm,scan-log-dump");
- if (ibm_scan_log_dump == RTAS_UNKNOWN_SERVICE) {
- printk(KERN_ERR "scan-log-dump not implemented on this system\n");
- return -EIO;
- }
-
- ent = create_proc_entry("ppc64/rtas/scan-log-dump", S_IRUSR, NULL);
- if (ent) {
- ent->proc_fops = &scanlog_fops;
- /* Ideally we could allocate a buffer < 4G */
- ent->data = kmalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL);
- if (!ent->data) {
- printk(KERN_ERR "Failed to allocate a buffer\n");
- remove_proc_entry("scan-log-dump", ent->parent);
- return -ENOMEM;
- }
- ((unsigned int *)ent->data)[0] = 0;
- } else {
- printk(KERN_ERR "Failed to create ppc64/scan-log-dump proc entry\n");
- return -EIO;
- }
- proc_ppc64_scan_log_dump = ent;
-
- return 0;
-}
-
-void __exit scanlog_cleanup(void)
-{
- if (proc_ppc64_scan_log_dump) {
- kfree(proc_ppc64_scan_log_dump->data);
- remove_proc_entry("scan-log-dump", proc_ppc64_scan_log_dump->parent);
- }
-}
-
-module_init(scanlog_init);
-module_exit(scanlog_cleanup);
-MODULE_LICENSE("GPL");