obj-$(CONFIG_PROC_FS) += $(procfs-y)
rtaspci-$(CONFIG_PPC64)-$(CONFIG_PCI) := rtas_pci.o
obj-$(CONFIG_PPC_RTAS) += rtas.o rtas-rtc.o $(rtaspci-y-y)
+obj-$(CONFIG_PPC_RTAS_DAEMON) += rtasd.o
obj-$(CONFIG_RTAS_FLASH) += rtas_flash.o
obj-$(CONFIG_RTAS_PROC) += rtas-proc.o
obj-$(CONFIG_LPARCFG) += lparcfg.o
--- /dev/null
+/*
+ * Copyright (C) 2001 Anton Blanchard <anton@au.ibm.com>, IBM
+ *
+ * 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.
+ *
+ * Communication to userspace based on kernel/printk.c
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/poll.h>
+#include <linux/proc_fs.h>
+#include <linux/init.h>
+#include <linux/vmalloc.h>
+#include <linux/spinlock.h>
+#include <linux/cpu.h>
+#include <linux/workqueue.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/rtas.h>
+#include <asm/prom.h>
+#include <asm/nvram.h>
+#include <asm/atomic.h>
+#include <asm/machdep.h>
+
+
+static DEFINE_SPINLOCK(rtasd_log_lock);
+
+static DECLARE_WAIT_QUEUE_HEAD(rtas_log_wait);
+
+static char *rtas_log_buf;
+static unsigned long rtas_log_start;
+static unsigned long rtas_log_size;
+
+static int surveillance_timeout = -1;
+
+static unsigned int rtas_error_log_max;
+static unsigned int rtas_error_log_buffer_max;
+
+/* RTAS service tokens */
+static unsigned int event_scan;
+static unsigned int rtas_event_scan_rate;
+
+static int full_rtas_msgs = 0;
+
+/* Stop logging to nvram after first fatal error */
+static int logging_enabled; /* Until we initialize everything,
+ * make sure we don't try logging
+ * anything */
+static int error_log_cnt;
+
+/*
+ * Since we use 32 bit RTAS, the physical address of this must be below
+ * 4G or else bad things happen. Allocate this in the kernel data and
+ * make it big enough.
+ */
+static unsigned char logdata[RTAS_ERROR_LOG_MAX];
+
+static char *rtas_type[] = {
+ "Unknown", "Retry", "TCE Error", "Internal Device Failure",
+ "Timeout", "Data Parity", "Address Parity", "Cache Parity",
+ "Address Invalid", "ECC Uncorrected", "ECC Corrupted",
+};
+
+static char *rtas_event_type(int type)
+{
+ if ((type > 0) && (type < 11))
+ return rtas_type[type];
+
+ switch (type) {
+ case RTAS_TYPE_EPOW:
+ return "EPOW";
+ case RTAS_TYPE_PLATFORM:
+ return "Platform Error";
+ case RTAS_TYPE_IO:
+ return "I/O Event";
+ case RTAS_TYPE_INFO:
+ return "Platform Information Event";
+ case RTAS_TYPE_DEALLOC:
+ return "Resource Deallocation Event";
+ case RTAS_TYPE_DUMP:
+ return "Dump Notification Event";
+ }
+
+ return rtas_type[0];
+}
+
+/* To see this info, grep RTAS /var/log/messages and each entry
+ * will be collected together with obvious begin/end.
+ * There will be a unique identifier on the begin and end lines.
+ * This will persist across reboots.
+ *
+ * format of error logs returned from RTAS:
+ * bytes (size) : contents
+ * --------------------------------------------------------
+ * 0-7 (8) : rtas_error_log
+ * 8-47 (40) : extended info
+ * 48-51 (4) : vendor id
+ * 52-1023 (vendor specific) : location code and debug data
+ */
+static void printk_log_rtas(char *buf, int len)
+{
+
+ int i,j,n = 0;
+ int perline = 16;
+ char buffer[64];
+ char * str = "RTAS event";
+
+ if (full_rtas_msgs) {
+ printk(RTAS_DEBUG "%d -------- %s begin --------\n",
+ error_log_cnt, str);
+
+ /*
+ * Print perline bytes on each line, each line will start
+ * with RTAS and a changing number, so syslogd will
+ * print lines that are otherwise the same. Separate every
+ * 4 bytes with a space.
+ */
+ for (i = 0; i < len; i++) {
+ j = i % perline;
+ if (j == 0) {
+ memset(buffer, 0, sizeof(buffer));
+ n = sprintf(buffer, "RTAS %d:", i/perline);
+ }
+
+ if ((i % 4) == 0)
+ n += sprintf(buffer+n, " ");
+
+ n += sprintf(buffer+n, "%02x", (unsigned char)buf[i]);
+
+ if (j == (perline-1))
+ printk(KERN_DEBUG "%s\n", buffer);
+ }
+ if ((i % perline) != 0)
+ printk(KERN_DEBUG "%s\n", buffer);
+
+ printk(RTAS_DEBUG "%d -------- %s end ----------\n",
+ error_log_cnt, str);
+ } else {
+ struct rtas_error_log *errlog = (struct rtas_error_log *)buf;
+
+ printk(RTAS_DEBUG "event: %d, Type: %s, Severity: %d\n",
+ error_log_cnt, rtas_event_type(errlog->type),
+ errlog->severity);
+ }
+}
+
+static int log_rtas_len(char * buf)
+{
+ int len;
+ struct rtas_error_log *err;
+
+ /* rtas fixed header */
+ len = 8;
+ err = (struct rtas_error_log *)buf;
+ if (err->extended_log_length) {
+
+ /* extended header */
+ len += err->extended_log_length;
+ }
+
+ if (rtas_error_log_max == 0)
+ rtas_error_log_max = rtas_get_error_log_max();
+
+ if (len > rtas_error_log_max)
+ len = rtas_error_log_max;
+
+ return len;
+}
+
+/*
+ * First write to nvram, if fatal error, that is the only
+ * place we log the info. The error will be picked up
+ * on the next reboot by rtasd. If not fatal, run the
+ * method for the type of error. Currently, only RTAS
+ * errors have methods implemented, but in the future
+ * there might be a need to store data in nvram before a
+ * call to panic().
+ *
+ * XXX We write to nvram periodically, to indicate error has
+ * been written and sync'd, but there is a possibility
+ * that if we don't shutdown correctly, a duplicate error
+ * record will be created on next reboot.
+ */
+void pSeries_log_error(char *buf, unsigned int err_type, int fatal)
+{
+ unsigned long offset;
+ unsigned long s;
+ int len = 0;
+
+ pr_debug("rtasd: logging event\n");
+ if (buf == NULL)
+ return;
+
+ spin_lock_irqsave(&rtasd_log_lock, s);
+
+ /* get length and increase count */
+ switch (err_type & ERR_TYPE_MASK) {
+ case ERR_TYPE_RTAS_LOG:
+ len = log_rtas_len(buf);
+ if (!(err_type & ERR_FLAG_BOOT))
+ error_log_cnt++;
+ break;
+ case ERR_TYPE_KERNEL_PANIC:
+ default:
+ WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */
+ spin_unlock_irqrestore(&rtasd_log_lock, s);
+ return;
+ }
+
+#ifdef CONFIG_PPC64
+ /* Write error to NVRAM */
+ if (logging_enabled && !(err_type & ERR_FLAG_BOOT))
+ nvram_write_error_log(buf, len, err_type, error_log_cnt);
+#endif /* CONFIG_PPC64 */
+
+ /*
+ * rtas errors can occur during boot, and we do want to capture
+ * those somewhere, even if nvram isn't ready (why not?), and even
+ * if rtasd isn't ready. Put them into the boot log, at least.
+ */
+ if ((err_type & ERR_TYPE_MASK) == ERR_TYPE_RTAS_LOG)
+ printk_log_rtas(buf, len);
+
+ /* Check to see if we need to or have stopped logging */
+ if (fatal || !logging_enabled) {
+ logging_enabled = 0;
+ WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */
+ spin_unlock_irqrestore(&rtasd_log_lock, s);
+ return;
+ }
+
+ /* call type specific method for error */
+ switch (err_type & ERR_TYPE_MASK) {
+ case ERR_TYPE_RTAS_LOG:
+ offset = rtas_error_log_buffer_max *
+ ((rtas_log_start+rtas_log_size) & LOG_NUMBER_MASK);
+
+ /* First copy over sequence number */
+ memcpy(&rtas_log_buf[offset], (void *) &error_log_cnt, sizeof(int));
+
+ /* Second copy over error log data */
+ offset += sizeof(int);
+ memcpy(&rtas_log_buf[offset], buf, len);
+
+ if (rtas_log_size < LOG_NUMBER)
+ rtas_log_size += 1;
+ else
+ rtas_log_start += 1;
+
+ WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */
+ spin_unlock_irqrestore(&rtasd_log_lock, s);
+ wake_up_interruptible(&rtas_log_wait);
+ break;
+ case ERR_TYPE_KERNEL_PANIC:
+ default:
+ WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */
+ spin_unlock_irqrestore(&rtasd_log_lock, s);
+ return;
+ }
+
+}
+
+static int rtas_log_open(struct inode * inode, struct file * file)
+{
+ return 0;
+}
+
+static int rtas_log_release(struct inode * inode, struct file * file)
+{
+ return 0;
+}
+
+/* This will check if all events are logged, if they are then, we
+ * know that we can safely clear the events in NVRAM.
+ * Next we'll sit and wait for something else to log.
+ */
+static ssize_t rtas_log_read(struct file * file, char __user * buf,
+ size_t count, loff_t *ppos)
+{
+ int error;
+ char *tmp;
+ unsigned long s;
+ unsigned long offset;
+
+ if (!buf || count < rtas_error_log_buffer_max)
+ return -EINVAL;
+
+ count = rtas_error_log_buffer_max;
+
+ if (!access_ok(VERIFY_WRITE, buf, count))
+ return -EFAULT;
+
+ tmp = kmalloc(count, GFP_KERNEL);
+ if (!tmp)
+ return -ENOMEM;
+
+ spin_lock_irqsave(&rtasd_log_lock, s);
+
+ /* if it's 0, then we know we got the last one (the one in NVRAM) */
+ while (rtas_log_size == 0) {
+ if (file->f_flags & O_NONBLOCK) {
+ spin_unlock_irqrestore(&rtasd_log_lock, s);
+ error = -EAGAIN;
+ goto out;
+ }
+
+ if (!logging_enabled) {
+ spin_unlock_irqrestore(&rtasd_log_lock, s);
+ error = -ENODATA;
+ goto out;
+ }
+#ifdef CONFIG_PPC64
+ nvram_clear_error_log();
+#endif /* CONFIG_PPC64 */
+
+ spin_unlock_irqrestore(&rtasd_log_lock, s);
+ error = wait_event_interruptible(rtas_log_wait, rtas_log_size);
+ if (error)
+ goto out;
+ spin_lock_irqsave(&rtasd_log_lock, s);
+ }
+
+ offset = rtas_error_log_buffer_max * (rtas_log_start & LOG_NUMBER_MASK);
+ memcpy(tmp, &rtas_log_buf[offset], count);
+
+ rtas_log_start += 1;
+ rtas_log_size -= 1;
+ spin_unlock_irqrestore(&rtasd_log_lock, s);
+
+ error = copy_to_user(buf, tmp, count) ? -EFAULT : count;
+out:
+ kfree(tmp);
+ return error;
+}
+
+static unsigned int rtas_log_poll(struct file *file, poll_table * wait)
+{
+ poll_wait(file, &rtas_log_wait, wait);
+ if (rtas_log_size)
+ return POLLIN | POLLRDNORM;
+ return 0;
+}
+
+static const struct file_operations proc_rtas_log_operations = {
+ .read = rtas_log_read,
+ .poll = rtas_log_poll,
+ .open = rtas_log_open,
+ .release = rtas_log_release,
+};
+
+static int enable_surveillance(int timeout)
+{
+ int error;
+
+ error = rtas_set_indicator(SURVEILLANCE_TOKEN, 0, timeout);
+
+ if (error == 0)
+ return 0;
+
+ if (error == -EINVAL) {
+ printk(KERN_DEBUG "rtasd: surveillance not supported\n");
+ return 0;
+ }
+
+ printk(KERN_ERR "rtasd: could not update surveillance\n");
+ return -1;
+}
+
+static void do_event_scan(void)
+{
+ int error;
+ do {
+ memset(logdata, 0, rtas_error_log_max);
+ error = rtas_call(event_scan, 4, 1, NULL,
+ RTAS_EVENT_SCAN_ALL_EVENTS, 0,
+ __pa(logdata), rtas_error_log_max);
+ if (error == -1) {
+ printk(KERN_ERR "event-scan failed\n");
+ break;
+ }
+
+ if (error == 0)
+ pSeries_log_error(logdata, ERR_TYPE_RTAS_LOG, 0);
+
+ } while(error == 0);
+}
+
+static void rtas_event_scan(struct work_struct *w);
+DECLARE_DELAYED_WORK(event_scan_work, rtas_event_scan);
+
+/*
+ * Delay should be at least one second since some machines have problems if
+ * we call event-scan too quickly.
+ */
+static unsigned long event_scan_delay = 1*HZ;
+static int first_pass = 1;
+
+static void rtas_event_scan(struct work_struct *w)
+{
+ unsigned int cpu;
+
+ do_event_scan();
+
+ get_online_cpus();
+
+ cpu = next_cpu(smp_processor_id(), cpu_online_map);
+ if (cpu == NR_CPUS) {
+ cpu = first_cpu(cpu_online_map);
+
+ if (first_pass) {
+ first_pass = 0;
+ event_scan_delay = 30*HZ/rtas_event_scan_rate;
+
+ if (surveillance_timeout != -1) {
+ pr_debug("rtasd: enabling surveillance\n");
+ enable_surveillance(surveillance_timeout);
+ pr_debug("rtasd: surveillance enabled\n");
+ }
+ }
+ }
+
+ schedule_delayed_work_on(cpu, &event_scan_work,
+ __round_jiffies_relative(event_scan_delay, cpu));
+
+ put_online_cpus();
+}
+
+#ifdef CONFIG_PPC64
+static void retreive_nvram_error_log(void)
+{
+ unsigned int err_type ;
+ int rc ;
+
+ /* See if we have any error stored in NVRAM */
+ memset(logdata, 0, rtas_error_log_max);
+ rc = nvram_read_error_log(logdata, rtas_error_log_max,
+ &err_type, &error_log_cnt);
+ /* We can use rtas_log_buf now */
+ logging_enabled = 1;
+ if (!rc) {
+ if (err_type != ERR_FLAG_ALREADY_LOGGED) {
+ pSeries_log_error(logdata, err_type | ERR_FLAG_BOOT, 0);
+ }
+ }
+}
+#else /* CONFIG_PPC64 */
+static void retreive_nvram_error_log(void)
+{
+}
+#endif /* CONFIG_PPC64 */
+
+static void start_event_scan(void)
+{
+ printk(KERN_DEBUG "RTAS daemon started\n");
+ pr_debug("rtasd: will sleep for %d milliseconds\n",
+ (30000 / rtas_event_scan_rate));
+
+ /* Retreive errors from nvram if any */
+ retreive_nvram_error_log();
+
+ schedule_delayed_work_on(first_cpu(cpu_online_map), &event_scan_work,
+ event_scan_delay);
+}
+
+static int __init rtas_init(void)
+{
+ struct proc_dir_entry *entry;
+
+ if (!machine_is(pseries) && !machine_is(chrp))
+ return 0;
+
+ /* No RTAS */
+ event_scan = rtas_token("event-scan");
+ if (event_scan == RTAS_UNKNOWN_SERVICE) {
+ printk(KERN_INFO "rtasd: No event-scan on system\n");
+ return -ENODEV;
+ }
+
+ rtas_event_scan_rate = rtas_token("rtas-event-scan-rate");
+ if (rtas_event_scan_rate == RTAS_UNKNOWN_SERVICE) {
+ printk(KERN_ERR "rtasd: no rtas-event-scan-rate on system\n");
+ return -ENODEV;
+ }
+
+ /* Make room for the sequence number */
+ rtas_error_log_max = rtas_get_error_log_max();
+ rtas_error_log_buffer_max = rtas_error_log_max + sizeof(int);
+
+ rtas_log_buf = vmalloc(rtas_error_log_buffer_max*LOG_NUMBER);
+ if (!rtas_log_buf) {
+ printk(KERN_ERR "rtasd: no memory\n");
+ return -ENOMEM;
+ }
+
+ entry = proc_create("powerpc/rtas/error_log", S_IRUSR, NULL,
+ &proc_rtas_log_operations);
+ if (!entry)
+ printk(KERN_ERR "Failed to create error_log proc entry\n");
+
+ start_event_scan();
+
+ return 0;
+}
+__initcall(rtas_init);
+
+static int __init surveillance_setup(char *str)
+{
+ int i;
+
+ /* We only do surveillance on pseries */
+ if (!machine_is(pseries))
+ return 0;
+
+ if (get_option(&str,&i)) {
+ if (i >= 0 && i <= 255)
+ surveillance_timeout = i;
+ }
+
+ return 1;
+}
+__setup("surveillance=", surveillance_setup);
+
+static int __init rtasmsgs_setup(char *str)
+{
+ if (strcmp(str, "on") == 0)
+ full_rtas_msgs = 1;
+ else if (strcmp(str, "off") == 0)
+ full_rtas_msgs = 0;
+
+ return 1;
+}
+__setup("rtasmsgs=", rtasmsgs_setup);
depends on PPC_RTAS
default n
+config PPC_RTAS_DAEMON
+ bool
+ depends on PPC_RTAS
+ default n
+
config RTAS_PROC
bool "Proc interface to RTAS"
depends on PPC_RTAS
select PPC_I8259
select PPC_INDIRECT_PCI
select PPC_RTAS
+ select PPC_RTAS_DAEMON
+ select RTAS_ERROR_LOGGING
select PPC_MPC106
select PPC_UDBG_16550
select PPC_NATIVE
if (ppc_md.progress) ppc_md.progress("Linux/PPC "UTS_RELEASE"\n", 0x0);
}
-void
-chrp_event_scan(unsigned long unused)
-{
- unsigned char log[1024];
- int ret = 0;
-
- /* XXX: we should loop until the hardware says no more error logs -- Cort */
- rtas_call(rtas_token("event-scan"), 4, 1, &ret, 0xffffffff, 0,
- __pa(log), 1024);
- mod_timer(&__get_cpu_var(heartbeat_timer),
- jiffies + event_scan_interval);
-}
-
static void chrp_8259_cascade(unsigned int irq, struct irq_desc *desc)
{
unsigned int cascade_irq = i8259_irq();
void __init
chrp_init2(void)
{
- struct device_node *device;
- const unsigned int *p = NULL;
-
#ifdef CONFIG_NVRAM
chrp_nvram_init();
#endif
request_region(0x80,0x10,"dma page reg");
request_region(0xc0,0x20,"dma2");
- /* Get the event scan rate for the rtas so we know how
- * often it expects a heartbeat. -- Cort
- */
- device = of_find_node_by_name(NULL, "rtas");
- if (device)
- p = of_get_property(device, "rtas-event-scan-rate", NULL);
- if (p && *p) {
- /*
- * Arrange to call chrp_event_scan at least *p times
- * per minute. We use 59 rather than 60 here so that
- * the rate will be slightly higher than the minimum.
- * This all assumes we don't do hotplug CPU on any
- * machine that needs the event scans done.
- */
- unsigned long interval, offset;
- int cpu, ncpus;
- struct timer_list *timer;
-
- interval = HZ * 59 / *p;
- offset = HZ;
- ncpus = num_online_cpus();
- event_scan_interval = ncpus * interval;
- for (cpu = 0; cpu < ncpus; ++cpu) {
- timer = &per_cpu(heartbeat_timer, cpu);
- setup_timer(timer, chrp_event_scan, 0);
- timer->expires = jiffies + offset;
- add_timer_on(timer, cpu);
- offset += interval;
- }
- printk("RTAS Event Scan Rate: %u (%lu jiffies)\n",
- *p, interval);
- }
- of_node_put(device);
-
if (ppc_md.progress)
ppc_md.progress(" Have fun! ", 0x7777);
}
select MPIC
select PPC_I8259
select PPC_RTAS
+ select PPC_RTAS_DAEMON
select RTAS_ERROR_LOGGING
select PPC_UDBG_16550
select PPC_NATIVE
endif
obj-y := lpar.o hvCall.o nvram.o reconfig.o \
- setup.o iommu.o ras.o rtasd.o \
+ setup.o iommu.o ras.o \
firmware.o power.o
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_XICS) += xics.o
+++ /dev/null
-/*
- * Copyright (C) 2001 Anton Blanchard <anton@au.ibm.com>, IBM
- *
- * 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.
- *
- * Communication to userspace based on kernel/printk.c
- */
-
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/poll.h>
-#include <linux/proc_fs.h>
-#include <linux/init.h>
-#include <linux/vmalloc.h>
-#include <linux/spinlock.h>
-#include <linux/cpu.h>
-#include <linux/workqueue.h>
-
-#include <asm/uaccess.h>
-#include <asm/io.h>
-#include <asm/rtas.h>
-#include <asm/prom.h>
-#include <asm/nvram.h>
-#include <asm/atomic.h>
-#include <asm/machdep.h>
-
-
-static DEFINE_SPINLOCK(rtasd_log_lock);
-
-static DECLARE_WAIT_QUEUE_HEAD(rtas_log_wait);
-
-static char *rtas_log_buf;
-static unsigned long rtas_log_start;
-static unsigned long rtas_log_size;
-
-static int surveillance_timeout = -1;
-static unsigned int rtas_error_log_max;
-static unsigned int rtas_error_log_buffer_max;
-
-/* RTAS service tokens */
-static unsigned int event_scan;
-static unsigned int rtas_event_scan_rate;
-
-static int full_rtas_msgs = 0;
-
-/* Stop logging to nvram after first fatal error */
-static int logging_enabled; /* Until we initialize everything,
- * make sure we don't try logging
- * anything */
-static int error_log_cnt;
-
-/*
- * Since we use 32 bit RTAS, the physical address of this must be below
- * 4G or else bad things happen. Allocate this in the kernel data and
- * make it big enough.
- */
-static unsigned char logdata[RTAS_ERROR_LOG_MAX];
-
-static char *rtas_type[] = {
- "Unknown", "Retry", "TCE Error", "Internal Device Failure",
- "Timeout", "Data Parity", "Address Parity", "Cache Parity",
- "Address Invalid", "ECC Uncorrected", "ECC Corrupted",
-};
-
-static char *rtas_event_type(int type)
-{
- if ((type > 0) && (type < 11))
- return rtas_type[type];
-
- switch (type) {
- case RTAS_TYPE_EPOW:
- return "EPOW";
- case RTAS_TYPE_PLATFORM:
- return "Platform Error";
- case RTAS_TYPE_IO:
- return "I/O Event";
- case RTAS_TYPE_INFO:
- return "Platform Information Event";
- case RTAS_TYPE_DEALLOC:
- return "Resource Deallocation Event";
- case RTAS_TYPE_DUMP:
- return "Dump Notification Event";
- }
-
- return rtas_type[0];
-}
-
-/* To see this info, grep RTAS /var/log/messages and each entry
- * will be collected together with obvious begin/end.
- * There will be a unique identifier on the begin and end lines.
- * This will persist across reboots.
- *
- * format of error logs returned from RTAS:
- * bytes (size) : contents
- * --------------------------------------------------------
- * 0-7 (8) : rtas_error_log
- * 8-47 (40) : extended info
- * 48-51 (4) : vendor id
- * 52-1023 (vendor specific) : location code and debug data
- */
-static void printk_log_rtas(char *buf, int len)
-{
-
- int i,j,n = 0;
- int perline = 16;
- char buffer[64];
- char * str = "RTAS event";
-
- if (full_rtas_msgs) {
- printk(RTAS_DEBUG "%d -------- %s begin --------\n",
- error_log_cnt, str);
-
- /*
- * Print perline bytes on each line, each line will start
- * with RTAS and a changing number, so syslogd will
- * print lines that are otherwise the same. Separate every
- * 4 bytes with a space.
- */
- for (i = 0; i < len; i++) {
- j = i % perline;
- if (j == 0) {
- memset(buffer, 0, sizeof(buffer));
- n = sprintf(buffer, "RTAS %d:", i/perline);
- }
-
- if ((i % 4) == 0)
- n += sprintf(buffer+n, " ");
-
- n += sprintf(buffer+n, "%02x", (unsigned char)buf[i]);
-
- if (j == (perline-1))
- printk(KERN_DEBUG "%s\n", buffer);
- }
- if ((i % perline) != 0)
- printk(KERN_DEBUG "%s\n", buffer);
-
- printk(RTAS_DEBUG "%d -------- %s end ----------\n",
- error_log_cnt, str);
- } else {
- struct rtas_error_log *errlog = (struct rtas_error_log *)buf;
-
- printk(RTAS_DEBUG "event: %d, Type: %s, Severity: %d\n",
- error_log_cnt, rtas_event_type(errlog->type),
- errlog->severity);
- }
-}
-
-static int log_rtas_len(char * buf)
-{
- int len;
- struct rtas_error_log *err;
-
- /* rtas fixed header */
- len = 8;
- err = (struct rtas_error_log *)buf;
- if (err->extended_log_length) {
-
- /* extended header */
- len += err->extended_log_length;
- }
-
- if (rtas_error_log_max == 0)
- rtas_error_log_max = rtas_get_error_log_max();
-
- if (len > rtas_error_log_max)
- len = rtas_error_log_max;
-
- return len;
-}
-
-/*
- * First write to nvram, if fatal error, that is the only
- * place we log the info. The error will be picked up
- * on the next reboot by rtasd. If not fatal, run the
- * method for the type of error. Currently, only RTAS
- * errors have methods implemented, but in the future
- * there might be a need to store data in nvram before a
- * call to panic().
- *
- * XXX We write to nvram periodically, to indicate error has
- * been written and sync'd, but there is a possibility
- * that if we don't shutdown correctly, a duplicate error
- * record will be created on next reboot.
- */
-void pSeries_log_error(char *buf, unsigned int err_type, int fatal)
-{
- unsigned long offset;
- unsigned long s;
- int len = 0;
-
- pr_debug("rtasd: logging event\n");
- if (buf == NULL)
- return;
-
- spin_lock_irqsave(&rtasd_log_lock, s);
-
- /* get length and increase count */
- switch (err_type & ERR_TYPE_MASK) {
- case ERR_TYPE_RTAS_LOG:
- len = log_rtas_len(buf);
- if (!(err_type & ERR_FLAG_BOOT))
- error_log_cnt++;
- break;
- case ERR_TYPE_KERNEL_PANIC:
- default:
- WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */
- spin_unlock_irqrestore(&rtasd_log_lock, s);
- return;
- }
-
- /* Write error to NVRAM */
- if (logging_enabled && !(err_type & ERR_FLAG_BOOT))
- nvram_write_error_log(buf, len, err_type, error_log_cnt);
-
- /*
- * rtas errors can occur during boot, and we do want to capture
- * those somewhere, even if nvram isn't ready (why not?), and even
- * if rtasd isn't ready. Put them into the boot log, at least.
- */
- if ((err_type & ERR_TYPE_MASK) == ERR_TYPE_RTAS_LOG)
- printk_log_rtas(buf, len);
-
- /* Check to see if we need to or have stopped logging */
- if (fatal || !logging_enabled) {
- logging_enabled = 0;
- WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */
- spin_unlock_irqrestore(&rtasd_log_lock, s);
- return;
- }
-
- /* call type specific method for error */
- switch (err_type & ERR_TYPE_MASK) {
- case ERR_TYPE_RTAS_LOG:
- offset = rtas_error_log_buffer_max *
- ((rtas_log_start+rtas_log_size) & LOG_NUMBER_MASK);
-
- /* First copy over sequence number */
- memcpy(&rtas_log_buf[offset], (void *) &error_log_cnt, sizeof(int));
-
- /* Second copy over error log data */
- offset += sizeof(int);
- memcpy(&rtas_log_buf[offset], buf, len);
-
- if (rtas_log_size < LOG_NUMBER)
- rtas_log_size += 1;
- else
- rtas_log_start += 1;
-
- WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */
- spin_unlock_irqrestore(&rtasd_log_lock, s);
- wake_up_interruptible(&rtas_log_wait);
- break;
- case ERR_TYPE_KERNEL_PANIC:
- default:
- WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */
- spin_unlock_irqrestore(&rtasd_log_lock, s);
- return;
- }
-
-}
-
-
-static int rtas_log_open(struct inode * inode, struct file * file)
-{
- return 0;
-}
-
-static int rtas_log_release(struct inode * inode, struct file * file)
-{
- return 0;
-}
-
-/* This will check if all events are logged, if they are then, we
- * know that we can safely clear the events in NVRAM.
- * Next we'll sit and wait for something else to log.
- */
-static ssize_t rtas_log_read(struct file * file, char __user * buf,
- size_t count, loff_t *ppos)
-{
- int error;
- char *tmp;
- unsigned long s;
- unsigned long offset;
-
- if (!buf || count < rtas_error_log_buffer_max)
- return -EINVAL;
-
- count = rtas_error_log_buffer_max;
-
- if (!access_ok(VERIFY_WRITE, buf, count))
- return -EFAULT;
-
- tmp = kmalloc(count, GFP_KERNEL);
- if (!tmp)
- return -ENOMEM;
-
- spin_lock_irqsave(&rtasd_log_lock, s);
- /* if it's 0, then we know we got the last one (the one in NVRAM) */
- while (rtas_log_size == 0) {
- if (file->f_flags & O_NONBLOCK) {
- spin_unlock_irqrestore(&rtasd_log_lock, s);
- error = -EAGAIN;
- goto out;
- }
-
- if (!logging_enabled) {
- spin_unlock_irqrestore(&rtasd_log_lock, s);
- error = -ENODATA;
- goto out;
- }
- nvram_clear_error_log();
-
- spin_unlock_irqrestore(&rtasd_log_lock, s);
- error = wait_event_interruptible(rtas_log_wait, rtas_log_size);
- if (error)
- goto out;
- spin_lock_irqsave(&rtasd_log_lock, s);
- }
-
- offset = rtas_error_log_buffer_max * (rtas_log_start & LOG_NUMBER_MASK);
- memcpy(tmp, &rtas_log_buf[offset], count);
-
- rtas_log_start += 1;
- rtas_log_size -= 1;
- spin_unlock_irqrestore(&rtasd_log_lock, s);
-
- error = copy_to_user(buf, tmp, count) ? -EFAULT : count;
-out:
- kfree(tmp);
- return error;
-}
-
-static unsigned int rtas_log_poll(struct file *file, poll_table * wait)
-{
- poll_wait(file, &rtas_log_wait, wait);
- if (rtas_log_size)
- return POLLIN | POLLRDNORM;
- return 0;
-}
-
-static const struct file_operations proc_rtas_log_operations = {
- .read = rtas_log_read,
- .poll = rtas_log_poll,
- .open = rtas_log_open,
- .release = rtas_log_release,
-};
-
-static int enable_surveillance(int timeout)
-{
- int error;
-
- error = rtas_set_indicator(SURVEILLANCE_TOKEN, 0, timeout);
-
- if (error == 0)
- return 0;
-
- if (error == -EINVAL) {
- printk(KERN_DEBUG "rtasd: surveillance not supported\n");
- return 0;
- }
-
- printk(KERN_ERR "rtasd: could not update surveillance\n");
- return -1;
-}
-
-static void do_event_scan(void)
-{
- int error;
- do {
- memset(logdata, 0, rtas_error_log_max);
- error = rtas_call(event_scan, 4, 1, NULL,
- RTAS_EVENT_SCAN_ALL_EVENTS, 0,
- __pa(logdata), rtas_error_log_max);
- if (error == -1) {
- printk(KERN_ERR "event-scan failed\n");
- break;
- }
-
- if (error == 0)
- pSeries_log_error(logdata, ERR_TYPE_RTAS_LOG, 0);
-
- } while(error == 0);
-}
-
-static void rtas_event_scan(struct work_struct *w);
-DECLARE_DELAYED_WORK(event_scan_work, rtas_event_scan);
-
-/*
- * Delay should be at least one second since some machines have problems if
- * we call event-scan too quickly.
- */
-static unsigned long event_scan_delay = 1*HZ;
-static int first_pass = 1;
-
-static void rtas_event_scan(struct work_struct *w)
-{
- unsigned int cpu;
-
- do_event_scan();
-
- get_online_cpus();
-
- cpu = next_cpu(smp_processor_id(), cpu_online_map);
- if (cpu == NR_CPUS) {
- cpu = first_cpu(cpu_online_map);
-
- if (first_pass) {
- first_pass = 0;
- event_scan_delay = 30*HZ/rtas_event_scan_rate;
-
- if (surveillance_timeout != -1) {
- pr_debug("rtasd: enabling surveillance\n");
- enable_surveillance(surveillance_timeout);
- pr_debug("rtasd: surveillance enabled\n");
- }
- }
- }
-
- schedule_delayed_work_on(cpu, &event_scan_work,
- __round_jiffies_relative(event_scan_delay, cpu));
-
- put_online_cpus();
-}
-
-static void start_event_scan(void)
-{
- unsigned int err_type;
- int rc;
-
- printk(KERN_DEBUG "RTAS daemon started\n");
- pr_debug("rtasd: will sleep for %d milliseconds\n",
- (30000 / rtas_event_scan_rate));
-
- /* See if we have any error stored in NVRAM */
- memset(logdata, 0, rtas_error_log_max);
- rc = nvram_read_error_log(logdata, rtas_error_log_max,
- &err_type, &error_log_cnt);
- /* We can use rtas_log_buf now */
- logging_enabled = 1;
-
- if (!rc) {
- if (err_type != ERR_FLAG_ALREADY_LOGGED) {
- pSeries_log_error(logdata, err_type | ERR_FLAG_BOOT, 0);
- }
- }
-
- schedule_delayed_work_on(first_cpu(cpu_online_map), &event_scan_work,
- event_scan_delay);
-}
-
-static int __init rtas_init(void)
-{
- struct proc_dir_entry *entry;
-
- if (!machine_is(pseries))
- return 0;
-
- /* No RTAS */
- event_scan = rtas_token("event-scan");
- if (event_scan == RTAS_UNKNOWN_SERVICE) {
- printk(KERN_DEBUG "rtasd: no event-scan on system\n");
- return -ENODEV;
- }
-
- rtas_event_scan_rate = rtas_token("rtas-event-scan-rate");
- if (rtas_event_scan_rate == RTAS_UNKNOWN_SERVICE) {
- printk(KERN_ERR "rtasd: no rtas-event-scan-rate on system\n");
- return -ENODEV;
- }
-
- /* Make room for the sequence number */
- rtas_error_log_max = rtas_get_error_log_max();
- rtas_error_log_buffer_max = rtas_error_log_max + sizeof(int);
-
- rtas_log_buf = vmalloc(rtas_error_log_buffer_max*LOG_NUMBER);
- if (!rtas_log_buf) {
- printk(KERN_ERR "rtasd: no memory\n");
- return -ENOMEM;
- }
-
- entry = proc_create("ppc64/rtas/error_log", S_IRUSR, NULL,
- &proc_rtas_log_operations);
- if (!entry)
- printk(KERN_ERR "Failed to create error_log proc entry\n");
-
- start_event_scan();
-
- return 0;
-}
-
-static int __init surveillance_setup(char *str)
-{
- int i;
-
- if (get_option(&str,&i)) {
- if (i >= 0 && i <= 255)
- surveillance_timeout = i;
- }
-
- return 1;
-}
-
-static int __init rtasmsgs_setup(char *str)
-{
- if (strcmp(str, "on") == 0)
- full_rtas_msgs = 1;
- else if (strcmp(str, "off") == 0)
- full_rtas_msgs = 0;
-
- return 1;
-}
-__initcall(rtas_init);
-__setup("surveillance=", surveillance_setup);
-__setup("rtasmsgs=", rtasmsgs_setup);
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff