A commit from 2008 says this driver was relevant only for "older
systems", and currently supported hardware doesn't have this
facility. Get rid of it.
Signed-off-by: Nathan Lynch <nath...@linux.ibm.com>
---
arch/powerpc/configs/ppc64_defconfig | 1 -
arch/powerpc/configs/pseries_defconfig | 1 -
arch/powerpc/platforms/pseries/Kconfig | 4 -
arch/powerpc/platforms/pseries/Makefile | 1 -
arch/powerpc/platforms/pseries/scanlog.c | 195 -----------------------
5 files changed, 202 deletions(-)
delete mode 100644 arch/powerpc/platforms/pseries/scanlog.c
diff --git a/arch/powerpc/configs/ppc64_defconfig
b/arch/powerpc/configs/ppc64_defconfig
index 701811c91a6f..acf13b4917c4 100644
--- a/arch/powerpc/configs/ppc64_defconfig
+++ b/arch/powerpc/configs/ppc64_defconfig
@@ -26,7 +26,6 @@ CONFIG_PPC64=y
CONFIG_NR_CPUS=2048
CONFIG_PPC_SPLPAR=y
CONFIG_DTL=y
-CONFIG_SCANLOG=m
CONFIG_PPC_SMLPAR=y
CONFIG_IBMEBUS=y
CONFIG_PPC_SVM=y
diff --git a/arch/powerpc/configs/pseries_defconfig
b/arch/powerpc/configs/pseries_defconfig
index 50168dde4ea5..d120321e4eea 100644
--- a/arch/powerpc/configs/pseries_defconfig
+++ b/arch/powerpc/configs/pseries_defconfig
@@ -38,7 +38,6 @@ CONFIG_MODULE_SRCVERSION_ALL=y
CONFIG_PARTITION_ADVANCED=y
CONFIG_PPC_SPLPAR=y
CONFIG_DTL=y
-CONFIG_SCANLOG=m
CONFIG_PPC_SMLPAR=y
CONFIG_IBMEBUS=y
CONFIG_PAPR_SCM=m
diff --git a/arch/powerpc/platforms/pseries/Kconfig
b/arch/powerpc/platforms/pseries/Kconfig
index 5e037df2a3a1..bf9b612a929b 100644
--- a/arch/powerpc/platforms/pseries/Kconfig
+++ b/arch/powerpc/platforms/pseries/Kconfig
@@ -61,10 +61,6 @@ config PSERIES_ENERGY
Provides: /sys/devices/system/cpu/pseries_(de)activation_hint_list
and /sys/devices/system/cpu/cpuN/pseries_(de)activation_hint
-config SCANLOG
- tristate "Scanlog dump interface"
- depends on RTAS_PROC && PPC_PSERIES
-
config IO_EVENT_IRQ
bool "IO Event Interrupt support"
depends on PPC_PSERIES
diff --git a/arch/powerpc/platforms/pseries/Makefile
b/arch/powerpc/platforms/pseries/Makefile
index c8a2b0b05ac0..754d1102de08 100644
--- a/arch/powerpc/platforms/pseries/Makefile
+++ b/arch/powerpc/platforms/pseries/Makefile
@@ -8,7 +8,6 @@ obj-y := lpar.o hvCall.o nvram.o reconfig.o \
firmware.o power.o dlpar.o mobility.o rng.o \
pci.o pci_dlpar.o eeh_pseries.o msi.o
obj-$(CONFIG_SMP) += smp.o
-obj-$(CONFIG_SCANLOG) += scanlog.o
obj-$(CONFIG_KEXEC_CORE) += kexec.o
obj-$(CONFIG_PSERIES_ENERGY) += pseries_energy.o
diff --git a/arch/powerpc/platforms/pseries/scanlog.c
b/arch/powerpc/platforms/pseries/scanlog.c
deleted file mode 100644
index 2879c4f0ceb7..000000000000
--- a/arch/powerpc/platforms/pseries/scanlog.c
+++ /dev/null
@@ -1,195 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * c 2001 PPC 64 Team, IBM Corp
- *
- * scan-log-data driver for PPC64 Todd Inglett <tingl...@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/powerpc/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 <linux/slab.h>
-#include <linux/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
-
-
-static unsigned int ibm_scan_log_dump; /* RTAS token */
-static unsigned int *scanlog_buffer; /* The data buffer */
-
-static ssize_t scanlog_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
-{
- unsigned int *data = scanlog_buffer;
- int status;
- unsigned long len, off;
- unsigned int wait_time;
-
- 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(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);
-
- pr_debug("scanlog: status=%d, data[0]=%x, data[1]=%x, " \
- "data[2]=%x\n", status, data[0], data[1], data[2]);
- switch (status) {
- case SCANLOG_COMPLETE:
- pr_debug("scanlog: hit eof\n");
- return 0;
- case SCANLOG_HWERROR:
- pr_debug("scanlog: hardware error reading 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:
- /* Assume extended busy */
- wait_time = rtas_busy_delay_time(status);
- if (!wait_time) {
- 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) {
- pr_debug("scanlog: reset scanlog\n");
- status = rtas_call(ibm_scan_log_dump, 2, 1, NULL, 0, 0);
- pr_debug("scanlog: rtas returns %d\n", status);
- }
- }
- return count;
-}
-
-static int scanlog_open(struct inode * inode, struct file * file)
-{
- unsigned int *data = scanlog_buffer;
-
- 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)
-{
- unsigned int *data = scanlog_buffer;
-
- data[0] = 0;
- return 0;
-}
-
-static const struct proc_ops scanlog_proc_ops = {
- .proc_read = scanlog_read,
- .proc_write = scanlog_write,
- .proc_open = scanlog_open,
- .proc_release = scanlog_release,
- .proc_lseek = noop_llseek,
-};
-
-static int __init scanlog_init(void)
-{
- struct proc_dir_entry *ent;
- int err = -ENOMEM;
-
- ibm_scan_log_dump = rtas_token("ibm,scan-log-dump");
- if (ibm_scan_log_dump == RTAS_UNKNOWN_SERVICE)
- return -ENODEV;
-
- /* Ideally we could allocate a buffer < 4G */
- scanlog_buffer = kzalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL);
- if (!scanlog_buffer)
- goto err;
-
- ent = proc_create("powerpc/rtas/scan-log-dump", 0400, NULL,
- &scanlog_proc_ops);
- if (!ent)
- goto err;
- return 0;
-err:
- kfree(scanlog_buffer);
- return err;
-}
-
-static void __exit scanlog_cleanup(void)
-{
- remove_proc_entry("powerpc/rtas/scan-log-dump", NULL);
- kfree(scanlog_buffer);
-}
-
-module_init(scanlog_init);
-module_exit(scanlog_cleanup);
-MODULE_LICENSE("GPL");
--
2.30.2
