Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/ppc64/kernel/rtasd.c b/arch/ppc64/kernel/rtasd.c
new file mode 100644
index 0000000..ff65dc3
--- /dev/null
+++ b/arch/ppc64/kernel/rtasd.c
@@ -0,0 +1,527 @@
+/*
+ * 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 <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/systemcfg.h>
+
+#if 0
+#define DEBUG(A...) printk(KERN_ERR A)
+#else
+#define DEBUG(A...)
+#endif
+
+static DEFINE_SPINLOCK(rtasd_log_lock);
+
+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_event_scan_rate;
+static unsigned int rtas_error_log_max;
+static unsigned int rtas_error_log_buffer_max;
+
+static int full_rtas_msgs = 0;
+
+extern int no_logging;
+
+volatile int error_log_cnt = 0;
+
+/*
+ * 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 int get_eventscan_parms(void);
+
+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) {
+ get_eventscan_parms();
+ }
+ 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;
+
+ DEBUG("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:
+ spin_unlock_irqrestore(&rtasd_log_lock, s);
+ return;
+ }
+
+ /* Write error to NVRAM */
+ if (!no_logging && !(err_type & ERR_FLAG_BOOT))
+ nvram_write_error_log(buf, len, err_type);
+
+ /*
+ * 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 || no_logging) {
+ no_logging = 1;
+ 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;
+
+ spin_unlock_irqrestore(&rtasd_log_lock, s);
+ wake_up_interruptible(&rtas_log_wait);
+ break;
+ case ERR_TYPE_KERNEL_PANIC:
+ default:
+ 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) */
+ if (rtas_log_size == 0 && !no_logging)
+ 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;
+}
+
+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_INFO "rtasd: surveillance not supported\n");
+ return 0;
+ }
+
+ printk(KERN_ERR "rtasd: could not update surveillance\n");
+ return -1;
+}
+
+static int get_eventscan_parms(void)
+{
+ struct device_node *node;
+ int *ip;
+
+ node = of_find_node_by_path("/rtas");
+
+ ip = (int *)get_property(node, "rtas-event-scan-rate", NULL);
+ if (ip == NULL) {
+ printk(KERN_ERR "rtasd: no rtas-event-scan-rate\n");
+ of_node_put(node);
+ return -1;
+ }
+ rtas_event_scan_rate = *ip;
+ DEBUG("rtas-event-scan-rate %d\n", rtas_event_scan_rate);
+
+ /* 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);
+
+ of_node_put(node);
+
+ return 0;
+}
+
+static void do_event_scan(int event_scan)
+{
+ 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 do_event_scan_all_cpus(long delay)
+{
+ int cpu;
+
+ lock_cpu_hotplug();
+ cpu = first_cpu(cpu_online_map);
+ for (;;) {
+ set_cpus_allowed(current, cpumask_of_cpu(cpu));
+ do_event_scan(rtas_token("event-scan"));
+ set_cpus_allowed(current, CPU_MASK_ALL);
+
+ /* Drop hotplug lock, and sleep for the specified delay */
+ unlock_cpu_hotplug();
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(delay);
+ lock_cpu_hotplug();
+
+ cpu = next_cpu(cpu, cpu_online_map);
+ if (cpu == NR_CPUS)
+ break;
+ }
+ unlock_cpu_hotplug();
+}
+
+static int rtasd(void *unused)
+{
+ unsigned int err_type;
+ int event_scan = rtas_token("event-scan");
+ int rc;
+
+ daemonize("rtasd");
+
+ if (event_scan == RTAS_UNKNOWN_SERVICE || get_eventscan_parms() == -1)
+ goto error;
+
+ rtas_log_buf = vmalloc(rtas_error_log_buffer_max*LOG_NUMBER);
+ if (!rtas_log_buf) {
+ printk(KERN_ERR "rtasd: no memory\n");
+ goto error;
+ }
+
+ printk(KERN_ERR "RTAS daemon started\n");
+
+ DEBUG("will sleep for %d jiffies\n", (HZ*60/rtas_event_scan_rate) / 2);
+
+ /* 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);
+
+ /* We can use rtas_log_buf now */
+ no_logging = 0;
+
+ if (!rc) {
+ if (err_type != ERR_FLAG_ALREADY_LOGGED) {
+ pSeries_log_error(logdata, err_type | ERR_FLAG_BOOT, 0);
+ }
+ }
+
+ /* First pass. */
+ do_event_scan_all_cpus(HZ);
+
+ if (surveillance_timeout != -1) {
+ DEBUG("enabling surveillance\n");
+ enable_surveillance(surveillance_timeout);
+ DEBUG("surveillance enabled\n");
+ }
+
+ /* Delay should be at least one second since some
+ * machines have problems if we call event-scan too
+ * quickly. */
+ for (;;)
+ do_event_scan_all_cpus((HZ*60/rtas_event_scan_rate) / 2);
+
+error:
+ /* Should delete proc entries */
+ return -EINVAL;
+}
+
+static int __init rtas_init(void)
+{
+ struct proc_dir_entry *entry;
+
+ /* No RTAS, only warn if we are on a pSeries box */
+ if (rtas_token("event-scan") == RTAS_UNKNOWN_SERVICE) {
+ if (systemcfg->platform & PLATFORM_PSERIES)
+ printk(KERN_ERR "rtasd: no event-scan on system\n");
+ return 1;
+ }
+
+ entry = create_proc_entry("ppc64/rtas/error_log", S_IRUSR, NULL);
+ if (entry)
+ entry->proc_fops = &proc_rtas_log_operations;
+ else
+ printk(KERN_ERR "Failed to create error_log proc entry\n");
+
+ if (kernel_thread(rtasd, NULL, CLONE_FS) < 0)
+ printk(KERN_ERR "Failed to start RTAS daemon\n");
+
+ 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);