[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>

2 files changed, 0 insertions, 236 deletions

diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile
index 1f71f23..048ba91 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 2edc947..0000000
--- 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");