^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2001 Anton Blanchard <anton@au.ibm.com>, IBM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Communication to userspace based on kernel/printk.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/poll.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/proc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/cpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/topology.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <asm/rtas.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <asm/prom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <asm/nvram.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <asm/machdep.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <asm/topology.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static DEFINE_SPINLOCK(rtasd_log_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static DECLARE_WAIT_QUEUE_HEAD(rtas_log_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static char *rtas_log_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static unsigned long rtas_log_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static unsigned long rtas_log_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static int surveillance_timeout = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static unsigned int rtas_error_log_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static unsigned int rtas_error_log_buffer_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) /* RTAS service tokens */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static unsigned int event_scan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static unsigned int rtas_event_scan_rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static bool full_rtas_msgs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /* Stop logging to nvram after first fatal error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static int logging_enabled; /* Until we initialize everything,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * make sure we don't try logging
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * anything */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static int error_log_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * Since we use 32 bit RTAS, the physical address of this must be below
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * 4G or else bad things happen. Allocate this in the kernel data and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * make it big enough.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static unsigned char logdata[RTAS_ERROR_LOG_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) static char *rtas_type[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) "Unknown", "Retry", "TCE Error", "Internal Device Failure",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) "Timeout", "Data Parity", "Address Parity", "Cache Parity",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) "Address Invalid", "ECC Uncorrected", "ECC Corrupted",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static char *rtas_event_type(int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if ((type > 0) && (type < 11))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return rtas_type[type];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) case RTAS_TYPE_EPOW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return "EPOW";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) case RTAS_TYPE_PLATFORM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return "Platform Error";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) case RTAS_TYPE_IO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return "I/O Event";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) case RTAS_TYPE_INFO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return "Platform Information Event";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) case RTAS_TYPE_DEALLOC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return "Resource Deallocation Event";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) case RTAS_TYPE_DUMP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return "Dump Notification Event";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) case RTAS_TYPE_PRRN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return "Platform Resource Reassignment Event";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) case RTAS_TYPE_HOTPLUG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return "Hotplug Event";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return rtas_type[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) /* To see this info, grep RTAS /var/log/messages and each entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * will be collected together with obvious begin/end.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * There will be a unique identifier on the begin and end lines.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) * This will persist across reboots.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) * format of error logs returned from RTAS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * bytes (size) : contents
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * --------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * 0-7 (8) : rtas_error_log
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * 8-47 (40) : extended info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * 48-51 (4) : vendor id
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * 52-1023 (vendor specific) : location code and debug data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static void printk_log_rtas(char *buf, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) int i,j,n = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) int perline = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) char buffer[64];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) char * str = "RTAS event";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (full_rtas_msgs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) printk(RTAS_DEBUG "%d -------- %s begin --------\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) error_log_cnt, str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) * Print perline bytes on each line, each line will start
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * with RTAS and a changing number, so syslogd will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * print lines that are otherwise the same. Separate every
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * 4 bytes with a space.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) for (i = 0; i < len; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) j = i % perline;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (j == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) memset(buffer, 0, sizeof(buffer));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) n = sprintf(buffer, "RTAS %d:", i/perline);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if ((i % 4) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) n += sprintf(buffer+n, " ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) n += sprintf(buffer+n, "%02x", (unsigned char)buf[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (j == (perline-1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) printk(KERN_DEBUG "%s\n", buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if ((i % perline) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) printk(KERN_DEBUG "%s\n", buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) printk(RTAS_DEBUG "%d -------- %s end ----------\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) error_log_cnt, str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) struct rtas_error_log *errlog = (struct rtas_error_log *)buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) printk(RTAS_DEBUG "event: %d, Type: %s (%d), Severity: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) error_log_cnt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) rtas_event_type(rtas_error_type(errlog)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) rtas_error_type(errlog),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) rtas_error_severity(errlog));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) static int log_rtas_len(char * buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) struct rtas_error_log *err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) uint32_t extended_log_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) /* rtas fixed header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) len = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) err = (struct rtas_error_log *)buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) extended_log_length = rtas_error_extended_log_length(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (rtas_error_extended(err) && extended_log_length) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) /* extended header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) len += extended_log_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (rtas_error_log_max == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) rtas_error_log_max = rtas_get_error_log_max();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (len > rtas_error_log_max)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) len = rtas_error_log_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) * First write to nvram, if fatal error, that is the only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) * place we log the info. The error will be picked up
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) * on the next reboot by rtasd. If not fatal, run the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) * method for the type of error. Currently, only RTAS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) * errors have methods implemented, but in the future
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) * there might be a need to store data in nvram before a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) * call to panic().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) * XXX We write to nvram periodically, to indicate error has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) * been written and sync'd, but there is a possibility
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * that if we don't shutdown correctly, a duplicate error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * record will be created on next reboot.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) void pSeries_log_error(char *buf, unsigned int err_type, int fatal)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) unsigned long offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) unsigned long s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) int len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) pr_debug("rtasd: logging event\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) if (buf == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) spin_lock_irqsave(&rtasd_log_lock, s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) /* get length and increase count */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) switch (err_type & ERR_TYPE_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) case ERR_TYPE_RTAS_LOG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) len = log_rtas_len(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) if (!(err_type & ERR_FLAG_BOOT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) error_log_cnt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) case ERR_TYPE_KERNEL_PANIC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) spin_unlock_irqrestore(&rtasd_log_lock, s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) #ifdef CONFIG_PPC64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) /* Write error to NVRAM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) if (logging_enabled && !(err_type & ERR_FLAG_BOOT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) nvram_write_error_log(buf, len, err_type, error_log_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) #endif /* CONFIG_PPC64 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) * rtas errors can occur during boot, and we do want to capture
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) * those somewhere, even if nvram isn't ready (why not?), and even
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * if rtasd isn't ready. Put them into the boot log, at least.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) if ((err_type & ERR_TYPE_MASK) == ERR_TYPE_RTAS_LOG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) printk_log_rtas(buf, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) /* Check to see if we need to or have stopped logging */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (fatal || !logging_enabled) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) logging_enabled = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) spin_unlock_irqrestore(&rtasd_log_lock, s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) /* call type specific method for error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) switch (err_type & ERR_TYPE_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) case ERR_TYPE_RTAS_LOG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) offset = rtas_error_log_buffer_max *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) ((rtas_log_start+rtas_log_size) & LOG_NUMBER_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) /* First copy over sequence number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) memcpy(&rtas_log_buf[offset], (void *) &error_log_cnt, sizeof(int));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) /* Second copy over error log data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) offset += sizeof(int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) memcpy(&rtas_log_buf[offset], buf, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) if (rtas_log_size < LOG_NUMBER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) rtas_log_size += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) rtas_log_start += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) spin_unlock_irqrestore(&rtasd_log_lock, s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) wake_up_interruptible(&rtas_log_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) case ERR_TYPE_KERNEL_PANIC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) spin_unlock_irqrestore(&rtasd_log_lock, s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) static void handle_rtas_event(const struct rtas_error_log *log)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) if (!machine_is(pseries))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) if (rtas_error_type(log) == RTAS_TYPE_PRRN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) pr_info_ratelimited("Platform resource reassignment ignored.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) static int rtas_log_open(struct inode * inode, struct file * file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) static int rtas_log_release(struct inode * inode, struct file * file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) /* This will check if all events are logged, if they are then, we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) * know that we can safely clear the events in NVRAM.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) * Next we'll sit and wait for something else to log.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) static ssize_t rtas_log_read(struct file * file, char __user * buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) char *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) unsigned long s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) unsigned long offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) if (!buf || count < rtas_error_log_buffer_max)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) count = rtas_error_log_buffer_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (!access_ok(buf, count))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) tmp = kmalloc(count, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) if (!tmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) spin_lock_irqsave(&rtasd_log_lock, s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) /* if it's 0, then we know we got the last one (the one in NVRAM) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) while (rtas_log_size == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) if (file->f_flags & O_NONBLOCK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) spin_unlock_irqrestore(&rtasd_log_lock, s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) error = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (!logging_enabled) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) spin_unlock_irqrestore(&rtasd_log_lock, s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) error = -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) #ifdef CONFIG_PPC64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) nvram_clear_error_log();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) #endif /* CONFIG_PPC64 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) spin_unlock_irqrestore(&rtasd_log_lock, s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) error = wait_event_interruptible(rtas_log_wait, rtas_log_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) spin_lock_irqsave(&rtasd_log_lock, s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) offset = rtas_error_log_buffer_max * (rtas_log_start & LOG_NUMBER_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) memcpy(tmp, &rtas_log_buf[offset], count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) rtas_log_start += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) rtas_log_size -= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) spin_unlock_irqrestore(&rtasd_log_lock, s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) error = copy_to_user(buf, tmp, count) ? -EFAULT : count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) kfree(tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) static __poll_t rtas_log_poll(struct file *file, poll_table * wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) poll_wait(file, &rtas_log_wait, wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) if (rtas_log_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) return EPOLLIN | EPOLLRDNORM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) static const struct proc_ops rtas_log_proc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) .proc_read = rtas_log_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) .proc_poll = rtas_log_poll,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) .proc_open = rtas_log_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) .proc_release = rtas_log_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) .proc_lseek = noop_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) static int enable_surveillance(int timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) error = rtas_set_indicator(SURVEILLANCE_TOKEN, 0, timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) if (error == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if (error == -EINVAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) printk(KERN_DEBUG "rtasd: surveillance not supported\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) printk(KERN_ERR "rtasd: could not update surveillance\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) static void do_event_scan(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) memset(logdata, 0, rtas_error_log_max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) error = rtas_call(event_scan, 4, 1, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) RTAS_EVENT_SCAN_ALL_EVENTS, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) __pa(logdata), rtas_error_log_max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) if (error == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) printk(KERN_ERR "event-scan failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) if (error == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) if (rtas_error_type((struct rtas_error_log *)logdata) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) RTAS_TYPE_PRRN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) pSeries_log_error(logdata, ERR_TYPE_RTAS_LOG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) handle_rtas_event((struct rtas_error_log *)logdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) } while(error == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) static void rtas_event_scan(struct work_struct *w);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) static DECLARE_DELAYED_WORK(event_scan_work, rtas_event_scan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) * Delay should be at least one second since some machines have problems if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) * we call event-scan too quickly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) static unsigned long event_scan_delay = 1*HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) static int first_pass = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) static void rtas_event_scan(struct work_struct *w)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) unsigned int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) do_event_scan();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) get_online_cpus();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) /* raw_ OK because just using CPU as starting point. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) cpu = cpumask_next(raw_smp_processor_id(), cpu_online_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) if (cpu >= nr_cpu_ids) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) cpu = cpumask_first(cpu_online_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) if (first_pass) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) first_pass = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) event_scan_delay = 30*HZ/rtas_event_scan_rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) if (surveillance_timeout != -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) pr_debug("rtasd: enabling surveillance\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) enable_surveillance(surveillance_timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) pr_debug("rtasd: surveillance enabled\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) schedule_delayed_work_on(cpu, &event_scan_work,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) __round_jiffies_relative(event_scan_delay, cpu));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) put_online_cpus();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) #ifdef CONFIG_PPC64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) static void retrieve_nvram_error_log(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) unsigned int err_type ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) int rc ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) /* See if we have any error stored in NVRAM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) memset(logdata, 0, rtas_error_log_max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) rc = nvram_read_error_log(logdata, rtas_error_log_max,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) &err_type, &error_log_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) /* We can use rtas_log_buf now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) logging_enabled = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) if (!rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) if (err_type != ERR_FLAG_ALREADY_LOGGED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) pSeries_log_error(logdata, err_type | ERR_FLAG_BOOT, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) #else /* CONFIG_PPC64 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) static void retrieve_nvram_error_log(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) #endif /* CONFIG_PPC64 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) static void start_event_scan(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) printk(KERN_DEBUG "RTAS daemon started\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) pr_debug("rtasd: will sleep for %d milliseconds\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) (30000 / rtas_event_scan_rate));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) /* Retrieve errors from nvram if any */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) retrieve_nvram_error_log();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) schedule_delayed_work_on(cpumask_first(cpu_online_mask),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) &event_scan_work, event_scan_delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) /* Cancel the rtas event scan work */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) void rtas_cancel_event_scan(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) cancel_delayed_work_sync(&event_scan_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) EXPORT_SYMBOL_GPL(rtas_cancel_event_scan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) static int __init rtas_event_scan_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) if (!machine_is(pseries) && !machine_is(chrp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) /* No RTAS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) event_scan = rtas_token("event-scan");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) if (event_scan == RTAS_UNKNOWN_SERVICE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) printk(KERN_INFO "rtasd: No event-scan on system\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) rtas_event_scan_rate = rtas_token("rtas-event-scan-rate");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) if (rtas_event_scan_rate == RTAS_UNKNOWN_SERVICE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) printk(KERN_ERR "rtasd: no rtas-event-scan-rate on system\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) if (!rtas_event_scan_rate) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) /* Broken firmware: take a rate of zero to mean don't scan */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) printk(KERN_DEBUG "rtasd: scan rate is 0, not scanning\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) /* Make room for the sequence number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) rtas_error_log_max = rtas_get_error_log_max();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) rtas_error_log_buffer_max = rtas_error_log_max + sizeof(int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) rtas_log_buf = vmalloc(array_size(LOG_NUMBER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) rtas_error_log_buffer_max));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) if (!rtas_log_buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) printk(KERN_ERR "rtasd: no memory\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) start_event_scan();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) arch_initcall(rtas_event_scan_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) static int __init rtas_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) struct proc_dir_entry *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) if (!machine_is(pseries) && !machine_is(chrp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) if (!rtas_log_buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) entry = proc_create("powerpc/rtas/error_log", 0400, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) &rtas_log_proc_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) if (!entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) printk(KERN_ERR "Failed to create error_log proc entry\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) __initcall(rtas_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) static int __init surveillance_setup(char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) /* We only do surveillance on pseries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) if (!machine_is(pseries))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) if (get_option(&str,&i)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) if (i >= 0 && i <= 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) surveillance_timeout = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) __setup("surveillance=", surveillance_setup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) static int __init rtasmsgs_setup(char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) return (kstrtobool(str, &full_rtas_msgs) == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) __setup("rtasmsgs=", rtasmsgs_setup);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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