Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2001 Anton Blanchard <anton@au.ibm.com>, IBM |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; either version |
| 7 | * 2 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * Communication to userspace based on kernel/printk.c |
| 10 | */ |
| 11 | |
| 12 | #include <linux/types.h> |
| 13 | #include <linux/errno.h> |
| 14 | #include <linux/sched.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/poll.h> |
| 17 | #include <linux/proc_fs.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/vmalloc.h> |
| 20 | #include <linux/spinlock.h> |
| 21 | #include <linux/cpu.h> |
Nishanth Aravamudan | 0287ebe | 2005-09-03 15:56:01 -0700 | [diff] [blame] | 22 | #include <linux/delay.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | #include <asm/uaccess.h> |
| 25 | #include <asm/io.h> |
| 26 | #include <asm/rtas.h> |
| 27 | #include <asm/prom.h> |
| 28 | #include <asm/nvram.h> |
| 29 | #include <asm/atomic.h> |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 30 | #include <asm/machdep.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
| 33 | static DEFINE_SPINLOCK(rtasd_log_lock); |
| 34 | |
Michael Ellerman | 541b275 | 2008-05-08 14:27:23 +1000 | [diff] [blame] | 35 | static DECLARE_WAIT_QUEUE_HEAD(rtas_log_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
| 37 | static char *rtas_log_buf; |
| 38 | static unsigned long rtas_log_start; |
| 39 | static unsigned long rtas_log_size; |
| 40 | |
| 41 | static int surveillance_timeout = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | static unsigned int rtas_error_log_max; |
| 43 | static unsigned int rtas_error_log_buffer_max; |
| 44 | |
Linas Vepstas | a4fc3a3 | 2007-08-10 07:01:50 +1000 | [diff] [blame] | 45 | /* RTAS service tokens */ |
| 46 | static unsigned int event_scan; |
| 47 | static unsigned int rtas_event_scan_rate; |
| 48 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | static int full_rtas_msgs = 0; |
| 50 | |
Linas Vepstas | 79c0108 | 2007-08-09 06:06:15 +1000 | [diff] [blame] | 51 | /* Stop logging to nvram after first fatal error */ |
Tony Breeds | a0c7ce9 | 2007-10-03 11:19:09 +1000 | [diff] [blame] | 52 | static int logging_enabled; /* Until we initialize everything, |
| 53 | * make sure we don't try logging |
| 54 | * anything */ |
Linas Vepstas | 0f2342c | 2007-08-10 06:56:41 +1000 | [diff] [blame] | 55 | static int error_log_cnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
| 57 | /* |
| 58 | * Since we use 32 bit RTAS, the physical address of this must be below |
| 59 | * 4G or else bad things happen. Allocate this in the kernel data and |
| 60 | * make it big enough. |
| 61 | */ |
| 62 | static unsigned char logdata[RTAS_ERROR_LOG_MAX]; |
| 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | static char *rtas_type[] = { |
| 65 | "Unknown", "Retry", "TCE Error", "Internal Device Failure", |
| 66 | "Timeout", "Data Parity", "Address Parity", "Cache Parity", |
| 67 | "Address Invalid", "ECC Uncorrected", "ECC Corrupted", |
| 68 | }; |
| 69 | |
| 70 | static char *rtas_event_type(int type) |
| 71 | { |
| 72 | if ((type > 0) && (type < 11)) |
| 73 | return rtas_type[type]; |
| 74 | |
| 75 | switch (type) { |
| 76 | case RTAS_TYPE_EPOW: |
| 77 | return "EPOW"; |
| 78 | case RTAS_TYPE_PLATFORM: |
| 79 | return "Platform Error"; |
| 80 | case RTAS_TYPE_IO: |
| 81 | return "I/O Event"; |
| 82 | case RTAS_TYPE_INFO: |
| 83 | return "Platform Information Event"; |
| 84 | case RTAS_TYPE_DEALLOC: |
| 85 | return "Resource Deallocation Event"; |
| 86 | case RTAS_TYPE_DUMP: |
| 87 | return "Dump Notification Event"; |
| 88 | } |
| 89 | |
| 90 | return rtas_type[0]; |
| 91 | } |
| 92 | |
| 93 | /* To see this info, grep RTAS /var/log/messages and each entry |
| 94 | * will be collected together with obvious begin/end. |
| 95 | * There will be a unique identifier on the begin and end lines. |
| 96 | * This will persist across reboots. |
| 97 | * |
| 98 | * format of error logs returned from RTAS: |
| 99 | * bytes (size) : contents |
| 100 | * -------------------------------------------------------- |
| 101 | * 0-7 (8) : rtas_error_log |
| 102 | * 8-47 (40) : extended info |
| 103 | * 48-51 (4) : vendor id |
| 104 | * 52-1023 (vendor specific) : location code and debug data |
| 105 | */ |
| 106 | static void printk_log_rtas(char *buf, int len) |
| 107 | { |
| 108 | |
| 109 | int i,j,n = 0; |
| 110 | int perline = 16; |
| 111 | char buffer[64]; |
| 112 | char * str = "RTAS event"; |
| 113 | |
| 114 | if (full_rtas_msgs) { |
| 115 | printk(RTAS_DEBUG "%d -------- %s begin --------\n", |
| 116 | error_log_cnt, str); |
| 117 | |
| 118 | /* |
| 119 | * Print perline bytes on each line, each line will start |
| 120 | * with RTAS and a changing number, so syslogd will |
| 121 | * print lines that are otherwise the same. Separate every |
| 122 | * 4 bytes with a space. |
| 123 | */ |
| 124 | for (i = 0; i < len; i++) { |
| 125 | j = i % perline; |
| 126 | if (j == 0) { |
| 127 | memset(buffer, 0, sizeof(buffer)); |
| 128 | n = sprintf(buffer, "RTAS %d:", i/perline); |
| 129 | } |
| 130 | |
| 131 | if ((i % 4) == 0) |
| 132 | n += sprintf(buffer+n, " "); |
| 133 | |
| 134 | n += sprintf(buffer+n, "%02x", (unsigned char)buf[i]); |
| 135 | |
| 136 | if (j == (perline-1)) |
| 137 | printk(KERN_DEBUG "%s\n", buffer); |
| 138 | } |
| 139 | if ((i % perline) != 0) |
| 140 | printk(KERN_DEBUG "%s\n", buffer); |
| 141 | |
| 142 | printk(RTAS_DEBUG "%d -------- %s end ----------\n", |
| 143 | error_log_cnt, str); |
| 144 | } else { |
| 145 | struct rtas_error_log *errlog = (struct rtas_error_log *)buf; |
| 146 | |
| 147 | printk(RTAS_DEBUG "event: %d, Type: %s, Severity: %d\n", |
| 148 | error_log_cnt, rtas_event_type(errlog->type), |
| 149 | errlog->severity); |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | static int log_rtas_len(char * buf) |
| 154 | { |
| 155 | int len; |
| 156 | struct rtas_error_log *err; |
| 157 | |
| 158 | /* rtas fixed header */ |
| 159 | len = 8; |
| 160 | err = (struct rtas_error_log *)buf; |
| 161 | if (err->extended_log_length) { |
| 162 | |
| 163 | /* extended header */ |
| 164 | len += err->extended_log_length; |
| 165 | } |
| 166 | |
Linas Vepstas | 4511dad | 2007-08-09 06:03:37 +1000 | [diff] [blame] | 167 | if (rtas_error_log_max == 0) |
| 168 | rtas_error_log_max = rtas_get_error_log_max(); |
| 169 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | if (len > rtas_error_log_max) |
| 171 | len = rtas_error_log_max; |
| 172 | |
| 173 | return len; |
| 174 | } |
| 175 | |
| 176 | /* |
| 177 | * First write to nvram, if fatal error, that is the only |
| 178 | * place we log the info. The error will be picked up |
| 179 | * on the next reboot by rtasd. If not fatal, run the |
| 180 | * method for the type of error. Currently, only RTAS |
| 181 | * errors have methods implemented, but in the future |
| 182 | * there might be a need to store data in nvram before a |
| 183 | * call to panic(). |
| 184 | * |
| 185 | * XXX We write to nvram periodically, to indicate error has |
| 186 | * been written and sync'd, but there is a possibility |
| 187 | * that if we don't shutdown correctly, a duplicate error |
| 188 | * record will be created on next reboot. |
| 189 | */ |
| 190 | void pSeries_log_error(char *buf, unsigned int err_type, int fatal) |
| 191 | { |
| 192 | unsigned long offset; |
| 193 | unsigned long s; |
| 194 | int len = 0; |
| 195 | |
Michael Ellerman | f7ebf35 | 2008-04-24 15:13:19 +1000 | [diff] [blame] | 196 | pr_debug("rtasd: logging event\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | if (buf == NULL) |
| 198 | return; |
| 199 | |
| 200 | spin_lock_irqsave(&rtasd_log_lock, s); |
| 201 | |
| 202 | /* get length and increase count */ |
| 203 | switch (err_type & ERR_TYPE_MASK) { |
| 204 | case ERR_TYPE_RTAS_LOG: |
| 205 | len = log_rtas_len(buf); |
| 206 | if (!(err_type & ERR_FLAG_BOOT)) |
| 207 | error_log_cnt++; |
| 208 | break; |
| 209 | case ERR_TYPE_KERNEL_PANIC: |
| 210 | default: |
Paul E. McKenney | 64db4cf | 2008-12-18 21:55:32 +0100 | [diff] [blame^] | 211 | WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | spin_unlock_irqrestore(&rtasd_log_lock, s); |
| 213 | return; |
| 214 | } |
| 215 | |
| 216 | /* Write error to NVRAM */ |
Tony Breeds | a0c7ce9 | 2007-10-03 11:19:09 +1000 | [diff] [blame] | 217 | if (logging_enabled && !(err_type & ERR_FLAG_BOOT)) |
Linas Vepstas | 0f2342c | 2007-08-10 06:56:41 +1000 | [diff] [blame] | 218 | nvram_write_error_log(buf, len, err_type, error_log_cnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | |
| 220 | /* |
| 221 | * rtas errors can occur during boot, and we do want to capture |
| 222 | * those somewhere, even if nvram isn't ready (why not?), and even |
| 223 | * if rtasd isn't ready. Put them into the boot log, at least. |
| 224 | */ |
| 225 | if ((err_type & ERR_TYPE_MASK) == ERR_TYPE_RTAS_LOG) |
| 226 | printk_log_rtas(buf, len); |
| 227 | |
| 228 | /* Check to see if we need to or have stopped logging */ |
Tony Breeds | a0c7ce9 | 2007-10-03 11:19:09 +1000 | [diff] [blame] | 229 | if (fatal || !logging_enabled) { |
| 230 | logging_enabled = 0; |
Paul E. McKenney | 64db4cf | 2008-12-18 21:55:32 +0100 | [diff] [blame^] | 231 | WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | spin_unlock_irqrestore(&rtasd_log_lock, s); |
| 233 | return; |
| 234 | } |
| 235 | |
| 236 | /* call type specific method for error */ |
| 237 | switch (err_type & ERR_TYPE_MASK) { |
| 238 | case ERR_TYPE_RTAS_LOG: |
| 239 | offset = rtas_error_log_buffer_max * |
| 240 | ((rtas_log_start+rtas_log_size) & LOG_NUMBER_MASK); |
| 241 | |
| 242 | /* First copy over sequence number */ |
| 243 | memcpy(&rtas_log_buf[offset], (void *) &error_log_cnt, sizeof(int)); |
| 244 | |
| 245 | /* Second copy over error log data */ |
| 246 | offset += sizeof(int); |
| 247 | memcpy(&rtas_log_buf[offset], buf, len); |
| 248 | |
| 249 | if (rtas_log_size < LOG_NUMBER) |
| 250 | rtas_log_size += 1; |
| 251 | else |
| 252 | rtas_log_start += 1; |
| 253 | |
Paul E. McKenney | 64db4cf | 2008-12-18 21:55:32 +0100 | [diff] [blame^] | 254 | WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | spin_unlock_irqrestore(&rtasd_log_lock, s); |
| 256 | wake_up_interruptible(&rtas_log_wait); |
| 257 | break; |
| 258 | case ERR_TYPE_KERNEL_PANIC: |
| 259 | default: |
Paul E. McKenney | 64db4cf | 2008-12-18 21:55:32 +0100 | [diff] [blame^] | 260 | WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | spin_unlock_irqrestore(&rtasd_log_lock, s); |
| 262 | return; |
| 263 | } |
| 264 | |
| 265 | } |
| 266 | |
| 267 | |
| 268 | static int rtas_log_open(struct inode * inode, struct file * file) |
| 269 | { |
| 270 | return 0; |
| 271 | } |
| 272 | |
| 273 | static int rtas_log_release(struct inode * inode, struct file * file) |
| 274 | { |
| 275 | return 0; |
| 276 | } |
| 277 | |
| 278 | /* This will check if all events are logged, if they are then, we |
| 279 | * know that we can safely clear the events in NVRAM. |
| 280 | * Next we'll sit and wait for something else to log. |
| 281 | */ |
| 282 | static ssize_t rtas_log_read(struct file * file, char __user * buf, |
| 283 | size_t count, loff_t *ppos) |
| 284 | { |
| 285 | int error; |
| 286 | char *tmp; |
| 287 | unsigned long s; |
| 288 | unsigned long offset; |
| 289 | |
| 290 | if (!buf || count < rtas_error_log_buffer_max) |
| 291 | return -EINVAL; |
| 292 | |
| 293 | count = rtas_error_log_buffer_max; |
| 294 | |
| 295 | if (!access_ok(VERIFY_WRITE, buf, count)) |
| 296 | return -EFAULT; |
| 297 | |
| 298 | tmp = kmalloc(count, GFP_KERNEL); |
| 299 | if (!tmp) |
| 300 | return -ENOMEM; |
| 301 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | spin_lock_irqsave(&rtasd_log_lock, s); |
| 303 | /* if it's 0, then we know we got the last one (the one in NVRAM) */ |
Vitaly Mayatskikh | 76c31f2 | 2008-09-28 23:24:33 +0000 | [diff] [blame] | 304 | while (rtas_log_size == 0) { |
| 305 | if (file->f_flags & O_NONBLOCK) { |
| 306 | spin_unlock_irqrestore(&rtasd_log_lock, s); |
| 307 | error = -EAGAIN; |
| 308 | goto out; |
| 309 | } |
| 310 | |
| 311 | if (!logging_enabled) { |
| 312 | spin_unlock_irqrestore(&rtasd_log_lock, s); |
| 313 | error = -ENODATA; |
| 314 | goto out; |
| 315 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | nvram_clear_error_log(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | |
Vitaly Mayatskikh | 76c31f2 | 2008-09-28 23:24:33 +0000 | [diff] [blame] | 318 | spin_unlock_irqrestore(&rtasd_log_lock, s); |
| 319 | error = wait_event_interruptible(rtas_log_wait, rtas_log_size); |
| 320 | if (error) |
| 321 | goto out; |
| 322 | spin_lock_irqsave(&rtasd_log_lock, s); |
| 323 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | offset = rtas_error_log_buffer_max * (rtas_log_start & LOG_NUMBER_MASK); |
| 326 | memcpy(tmp, &rtas_log_buf[offset], count); |
| 327 | |
| 328 | rtas_log_start += 1; |
| 329 | rtas_log_size -= 1; |
| 330 | spin_unlock_irqrestore(&rtasd_log_lock, s); |
| 331 | |
| 332 | error = copy_to_user(buf, tmp, count) ? -EFAULT : count; |
| 333 | out: |
| 334 | kfree(tmp); |
| 335 | return error; |
| 336 | } |
| 337 | |
| 338 | static unsigned int rtas_log_poll(struct file *file, poll_table * wait) |
| 339 | { |
| 340 | poll_wait(file, &rtas_log_wait, wait); |
| 341 | if (rtas_log_size) |
| 342 | return POLLIN | POLLRDNORM; |
| 343 | return 0; |
| 344 | } |
| 345 | |
Michael Ellerman | 541b275 | 2008-05-08 14:27:23 +1000 | [diff] [blame] | 346 | static const struct file_operations proc_rtas_log_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | .read = rtas_log_read, |
| 348 | .poll = rtas_log_poll, |
| 349 | .open = rtas_log_open, |
| 350 | .release = rtas_log_release, |
| 351 | }; |
| 352 | |
| 353 | static int enable_surveillance(int timeout) |
| 354 | { |
| 355 | int error; |
| 356 | |
| 357 | error = rtas_set_indicator(SURVEILLANCE_TOKEN, 0, timeout); |
| 358 | |
| 359 | if (error == 0) |
| 360 | return 0; |
| 361 | |
| 362 | if (error == -EINVAL) { |
Olof Johansson | 90ddfeb | 2006-04-12 15:28:13 -0500 | [diff] [blame] | 363 | printk(KERN_DEBUG "rtasd: surveillance not supported\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | return 0; |
| 365 | } |
| 366 | |
| 367 | printk(KERN_ERR "rtasd: could not update surveillance\n"); |
| 368 | return -1; |
| 369 | } |
| 370 | |
Linas Vepstas | a4fc3a3 | 2007-08-10 07:01:50 +1000 | [diff] [blame] | 371 | static void do_event_scan(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | { |
| 373 | int error; |
| 374 | do { |
| 375 | memset(logdata, 0, rtas_error_log_max); |
| 376 | error = rtas_call(event_scan, 4, 1, NULL, |
| 377 | RTAS_EVENT_SCAN_ALL_EVENTS, 0, |
| 378 | __pa(logdata), rtas_error_log_max); |
| 379 | if (error == -1) { |
| 380 | printk(KERN_ERR "event-scan failed\n"); |
| 381 | break; |
| 382 | } |
| 383 | |
| 384 | if (error == 0) |
| 385 | pSeries_log_error(logdata, ERR_TYPE_RTAS_LOG, 0); |
| 386 | |
| 387 | } while(error == 0); |
| 388 | } |
| 389 | |
| 390 | static void do_event_scan_all_cpus(long delay) |
| 391 | { |
| 392 | int cpu; |
| 393 | |
Gautham R Shenoy | 86ef5c9 | 2008-01-25 21:08:02 +0100 | [diff] [blame] | 394 | get_online_cpus(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | cpu = first_cpu(cpu_online_map); |
| 396 | for (;;) { |
| 397 | set_cpus_allowed(current, cpumask_of_cpu(cpu)); |
Linas Vepstas | a4fc3a3 | 2007-08-10 07:01:50 +1000 | [diff] [blame] | 398 | do_event_scan(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | set_cpus_allowed(current, CPU_MASK_ALL); |
| 400 | |
| 401 | /* Drop hotplug lock, and sleep for the specified delay */ |
Gautham R Shenoy | 86ef5c9 | 2008-01-25 21:08:02 +0100 | [diff] [blame] | 402 | put_online_cpus(); |
Nishanth Aravamudan | 0287ebe | 2005-09-03 15:56:01 -0700 | [diff] [blame] | 403 | msleep_interruptible(delay); |
Gautham R Shenoy | 86ef5c9 | 2008-01-25 21:08:02 +0100 | [diff] [blame] | 404 | get_online_cpus(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
| 406 | cpu = next_cpu(cpu, cpu_online_map); |
| 407 | if (cpu == NR_CPUS) |
| 408 | break; |
| 409 | } |
Gautham R Shenoy | 86ef5c9 | 2008-01-25 21:08:02 +0100 | [diff] [blame] | 410 | put_online_cpus(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | } |
| 412 | |
| 413 | static int rtasd(void *unused) |
| 414 | { |
| 415 | unsigned int err_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | int rc; |
| 417 | |
| 418 | daemonize("rtasd"); |
| 419 | |
Olof Johansson | 90ddfeb | 2006-04-12 15:28:13 -0500 | [diff] [blame] | 420 | printk(KERN_DEBUG "RTAS daemon started\n"); |
Michael Ellerman | f7ebf35 | 2008-04-24 15:13:19 +1000 | [diff] [blame] | 421 | pr_debug("rtasd: will sleep for %d milliseconds\n", |
| 422 | (30000 / rtas_event_scan_rate)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | |
| 424 | /* See if we have any error stored in NVRAM */ |
| 425 | memset(logdata, 0, rtas_error_log_max); |
Linas Vepstas | 0f2342c | 2007-08-10 06:56:41 +1000 | [diff] [blame] | 426 | rc = nvram_read_error_log(logdata, rtas_error_log_max, |
| 427 | &err_type, &error_log_cnt); |
Tony Breeds | a0c7ce9 | 2007-10-03 11:19:09 +1000 | [diff] [blame] | 428 | /* We can use rtas_log_buf now */ |
| 429 | logging_enabled = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | if (!rc) { |
| 432 | if (err_type != ERR_FLAG_ALREADY_LOGGED) { |
| 433 | pSeries_log_error(logdata, err_type | ERR_FLAG_BOOT, 0); |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | /* First pass. */ |
Nishanth Aravamudan | 0287ebe | 2005-09-03 15:56:01 -0700 | [diff] [blame] | 438 | do_event_scan_all_cpus(1000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
| 440 | if (surveillance_timeout != -1) { |
Michael Ellerman | f7ebf35 | 2008-04-24 15:13:19 +1000 | [diff] [blame] | 441 | pr_debug("rtasd: enabling surveillance\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | enable_surveillance(surveillance_timeout); |
Michael Ellerman | f7ebf35 | 2008-04-24 15:13:19 +1000 | [diff] [blame] | 443 | pr_debug("rtasd: surveillance enabled\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | } |
| 445 | |
| 446 | /* Delay should be at least one second since some |
| 447 | * machines have problems if we call event-scan too |
| 448 | * quickly. */ |
| 449 | for (;;) |
Nishanth Aravamudan | 0287ebe | 2005-09-03 15:56:01 -0700 | [diff] [blame] | 450 | do_event_scan_all_cpus(30000/rtas_event_scan_rate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | return -EINVAL; |
| 453 | } |
| 454 | |
| 455 | static int __init rtas_init(void) |
| 456 | { |
| 457 | struct proc_dir_entry *entry; |
| 458 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 459 | if (!machine_is(pseries)) |
Paul Mackerras | 799d604 | 2005-11-10 13:37:51 +1100 | [diff] [blame] | 460 | return 0; |
| 461 | |
| 462 | /* No RTAS */ |
Linas Vepstas | a4fc3a3 | 2007-08-10 07:01:50 +1000 | [diff] [blame] | 463 | event_scan = rtas_token("event-scan"); |
| 464 | if (event_scan == RTAS_UNKNOWN_SERVICE) { |
Olof Johansson | 90ddfeb | 2006-04-12 15:28:13 -0500 | [diff] [blame] | 465 | printk(KERN_DEBUG "rtasd: no event-scan on system\n"); |
Anton Blanchard | 49c28e4 | 2006-04-02 20:18:32 +1000 | [diff] [blame] | 466 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | } |
| 468 | |
Linas Vepstas | 4511dad | 2007-08-09 06:03:37 +1000 | [diff] [blame] | 469 | rtas_event_scan_rate = rtas_token("rtas-event-scan-rate"); |
| 470 | if (rtas_event_scan_rate == RTAS_UNKNOWN_SERVICE) { |
| 471 | printk(KERN_ERR "rtasd: no rtas-event-scan-rate on system\n"); |
| 472 | return -ENODEV; |
| 473 | } |
| 474 | |
| 475 | /* Make room for the sequence number */ |
| 476 | rtas_error_log_max = rtas_get_error_log_max(); |
| 477 | rtas_error_log_buffer_max = rtas_error_log_max + sizeof(int); |
| 478 | |
| 479 | rtas_log_buf = vmalloc(rtas_error_log_buffer_max*LOG_NUMBER); |
| 480 | if (!rtas_log_buf) { |
| 481 | printk(KERN_ERR "rtasd: no memory\n"); |
| 482 | return -ENOMEM; |
| 483 | } |
| 484 | |
Denis V. Lunev | 6674713 | 2008-04-29 01:02:26 -0700 | [diff] [blame] | 485 | entry = proc_create("ppc64/rtas/error_log", S_IRUSR, NULL, |
| 486 | &proc_rtas_log_operations); |
| 487 | if (!entry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | printk(KERN_ERR "Failed to create error_log proc entry\n"); |
| 489 | |
| 490 | if (kernel_thread(rtasd, NULL, CLONE_FS) < 0) |
| 491 | printk(KERN_ERR "Failed to start RTAS daemon\n"); |
| 492 | |
| 493 | return 0; |
| 494 | } |
| 495 | |
| 496 | static int __init surveillance_setup(char *str) |
| 497 | { |
| 498 | int i; |
| 499 | |
| 500 | if (get_option(&str,&i)) { |
| 501 | if (i >= 0 && i <= 255) |
| 502 | surveillance_timeout = i; |
| 503 | } |
| 504 | |
| 505 | return 1; |
| 506 | } |
| 507 | |
| 508 | static int __init rtasmsgs_setup(char *str) |
| 509 | { |
| 510 | if (strcmp(str, "on") == 0) |
| 511 | full_rtas_msgs = 1; |
| 512 | else if (strcmp(str, "off") == 0) |
| 513 | full_rtas_msgs = 0; |
| 514 | |
| 515 | return 1; |
| 516 | } |
| 517 | __initcall(rtas_init); |
| 518 | __setup("surveillance=", surveillance_setup); |
| 519 | __setup("rtasmsgs=", rtasmsgs_setup); |