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Commit | Line | Data |
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1da177e4 LT |
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> | |
f8729e85 | 22 | #include <linux/workqueue.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
675d8ee6 | 24 | #include <linux/topology.h> |
1da177e4 | 25 | |
7c0f6ba6 | 26 | #include <linux/uaccess.h> |
1da177e4 LT |
27 | #include <asm/io.h> |
28 | #include <asm/rtas.h> | |
29 | #include <asm/prom.h> | |
30 | #include <asm/nvram.h> | |
60063497 | 31 | #include <linux/atomic.h> |
e8222502 | 32 | #include <asm/machdep.h> |
e04fa612 | 33 | #include <asm/topology.h> |
1da177e4 | 34 | |
1da177e4 LT |
35 | |
36 | static DEFINE_SPINLOCK(rtasd_log_lock); | |
37 | ||
541b2755 | 38 | static DECLARE_WAIT_QUEUE_HEAD(rtas_log_wait); |
1da177e4 LT |
39 | |
40 | static char *rtas_log_buf; | |
41 | static unsigned long rtas_log_start; | |
42 | static unsigned long rtas_log_size; | |
43 | ||
44 | static int surveillance_timeout = -1; | |
3d541c4b | 45 | |
1da177e4 LT |
46 | static unsigned int rtas_error_log_max; |
47 | static unsigned int rtas_error_log_buffer_max; | |
48 | ||
a4fc3a3c LV |
49 | /* RTAS service tokens */ |
50 | static unsigned int event_scan; | |
51 | static unsigned int rtas_event_scan_rate; | |
52 | ||
4cc7ecb7 | 53 | static bool full_rtas_msgs; |
1da177e4 | 54 | |
79c0108d | 55 | /* Stop logging to nvram after first fatal error */ |
a0c7ce9c TB |
56 | static int logging_enabled; /* Until we initialize everything, |
57 | * make sure we don't try logging | |
58 | * anything */ | |
0f2342c8 | 59 | static int error_log_cnt; |
1da177e4 LT |
60 | |
61 | /* | |
62 | * Since we use 32 bit RTAS, the physical address of this must be below | |
63 | * 4G or else bad things happen. Allocate this in the kernel data and | |
64 | * make it big enough. | |
65 | */ | |
66 | static unsigned char logdata[RTAS_ERROR_LOG_MAX]; | |
67 | ||
1da177e4 LT |
68 | static char *rtas_type[] = { |
69 | "Unknown", "Retry", "TCE Error", "Internal Device Failure", | |
70 | "Timeout", "Data Parity", "Address Parity", "Cache Parity", | |
71 | "Address Invalid", "ECC Uncorrected", "ECC Corrupted", | |
72 | }; | |
73 | ||
74 | static char *rtas_event_type(int type) | |
75 | { | |
76 | if ((type > 0) && (type < 11)) | |
77 | return rtas_type[type]; | |
78 | ||
79 | switch (type) { | |
80 | case RTAS_TYPE_EPOW: | |
81 | return "EPOW"; | |
82 | case RTAS_TYPE_PLATFORM: | |
83 | return "Platform Error"; | |
84 | case RTAS_TYPE_IO: | |
85 | return "I/O Event"; | |
86 | case RTAS_TYPE_INFO: | |
87 | return "Platform Information Event"; | |
88 | case RTAS_TYPE_DEALLOC: | |
89 | return "Resource Deallocation Event"; | |
90 | case RTAS_TYPE_DUMP: | |
91 | return "Dump Notification Event"; | |
49c68a85 JL |
92 | case RTAS_TYPE_PRRN: |
93 | return "Platform Resource Reassignment Event"; | |
1da177e4 LT |
94 | } |
95 | ||
96 | return rtas_type[0]; | |
97 | } | |
98 | ||
99 | /* To see this info, grep RTAS /var/log/messages and each entry | |
100 | * will be collected together with obvious begin/end. | |
101 | * There will be a unique identifier on the begin and end lines. | |
102 | * This will persist across reboots. | |
103 | * | |
104 | * format of error logs returned from RTAS: | |
105 | * bytes (size) : contents | |
106 | * -------------------------------------------------------- | |
107 | * 0-7 (8) : rtas_error_log | |
108 | * 8-47 (40) : extended info | |
109 | * 48-51 (4) : vendor id | |
110 | * 52-1023 (vendor specific) : location code and debug data | |
111 | */ | |
112 | static void printk_log_rtas(char *buf, int len) | |
113 | { | |
114 | ||
115 | int i,j,n = 0; | |
116 | int perline = 16; | |
117 | char buffer[64]; | |
118 | char * str = "RTAS event"; | |
119 | ||
120 | if (full_rtas_msgs) { | |
121 | printk(RTAS_DEBUG "%d -------- %s begin --------\n", | |
122 | error_log_cnt, str); | |
123 | ||
124 | /* | |
125 | * Print perline bytes on each line, each line will start | |
126 | * with RTAS and a changing number, so syslogd will | |
127 | * print lines that are otherwise the same. Separate every | |
128 | * 4 bytes with a space. | |
129 | */ | |
130 | for (i = 0; i < len; i++) { | |
131 | j = i % perline; | |
132 | if (j == 0) { | |
133 | memset(buffer, 0, sizeof(buffer)); | |
134 | n = sprintf(buffer, "RTAS %d:", i/perline); | |
135 | } | |
136 | ||
137 | if ((i % 4) == 0) | |
138 | n += sprintf(buffer+n, " "); | |
139 | ||
140 | n += sprintf(buffer+n, "%02x", (unsigned char)buf[i]); | |
141 | ||
142 | if (j == (perline-1)) | |
143 | printk(KERN_DEBUG "%s\n", buffer); | |
144 | } | |
145 | if ((i % perline) != 0) | |
146 | printk(KERN_DEBUG "%s\n", buffer); | |
147 | ||
148 | printk(RTAS_DEBUG "%d -------- %s end ----------\n", | |
149 | error_log_cnt, str); | |
150 | } else { | |
151 | struct rtas_error_log *errlog = (struct rtas_error_log *)buf; | |
152 | ||
153 | printk(RTAS_DEBUG "event: %d, Type: %s, Severity: %d\n", | |
a08a53ea GK |
154 | error_log_cnt, rtas_event_type(rtas_error_type(errlog)), |
155 | rtas_error_severity(errlog)); | |
1da177e4 LT |
156 | } |
157 | } | |
158 | ||
159 | static int log_rtas_len(char * buf) | |
160 | { | |
161 | int len; | |
162 | struct rtas_error_log *err; | |
a08a53ea | 163 | uint32_t extended_log_length; |
1da177e4 LT |
164 | |
165 | /* rtas fixed header */ | |
166 | len = 8; | |
167 | err = (struct rtas_error_log *)buf; | |
a08a53ea GK |
168 | extended_log_length = rtas_error_extended_log_length(err); |
169 | if (rtas_error_extended(err) && extended_log_length) { | |
1da177e4 LT |
170 | |
171 | /* extended header */ | |
a08a53ea | 172 | len += extended_log_length; |
1da177e4 LT |
173 | } |
174 | ||
4511dad4 LV |
175 | if (rtas_error_log_max == 0) |
176 | rtas_error_log_max = rtas_get_error_log_max(); | |
177 | ||
1da177e4 LT |
178 | if (len > rtas_error_log_max) |
179 | len = rtas_error_log_max; | |
180 | ||
181 | return len; | |
182 | } | |
183 | ||
184 | /* | |
185 | * First write to nvram, if fatal error, that is the only | |
186 | * place we log the info. The error will be picked up | |
187 | * on the next reboot by rtasd. If not fatal, run the | |
188 | * method for the type of error. Currently, only RTAS | |
189 | * errors have methods implemented, but in the future | |
190 | * there might be a need to store data in nvram before a | |
191 | * call to panic(). | |
192 | * | |
193 | * XXX We write to nvram periodically, to indicate error has | |
194 | * been written and sync'd, but there is a possibility | |
195 | * that if we don't shutdown correctly, a duplicate error | |
196 | * record will be created on next reboot. | |
197 | */ | |
198 | void pSeries_log_error(char *buf, unsigned int err_type, int fatal) | |
199 | { | |
200 | unsigned long offset; | |
201 | unsigned long s; | |
202 | int len = 0; | |
203 | ||
f7ebf352 | 204 | pr_debug("rtasd: logging event\n"); |
1da177e4 LT |
205 | if (buf == NULL) |
206 | return; | |
207 | ||
208 | spin_lock_irqsave(&rtasd_log_lock, s); | |
209 | ||
210 | /* get length and increase count */ | |
211 | switch (err_type & ERR_TYPE_MASK) { | |
212 | case ERR_TYPE_RTAS_LOG: | |
213 | len = log_rtas_len(buf); | |
214 | if (!(err_type & ERR_FLAG_BOOT)) | |
215 | error_log_cnt++; | |
216 | break; | |
217 | case ERR_TYPE_KERNEL_PANIC: | |
218 | default: | |
64db4cff | 219 | WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */ |
1da177e4 LT |
220 | spin_unlock_irqrestore(&rtasd_log_lock, s); |
221 | return; | |
222 | } | |
223 | ||
3d541c4b | 224 | #ifdef CONFIG_PPC64 |
1da177e4 | 225 | /* Write error to NVRAM */ |
a0c7ce9c | 226 | if (logging_enabled && !(err_type & ERR_FLAG_BOOT)) |
0f2342c8 | 227 | nvram_write_error_log(buf, len, err_type, error_log_cnt); |
3d541c4b | 228 | #endif /* CONFIG_PPC64 */ |
1da177e4 LT |
229 | |
230 | /* | |
231 | * rtas errors can occur during boot, and we do want to capture | |
232 | * those somewhere, even if nvram isn't ready (why not?), and even | |
233 | * if rtasd isn't ready. Put them into the boot log, at least. | |
234 | */ | |
235 | if ((err_type & ERR_TYPE_MASK) == ERR_TYPE_RTAS_LOG) | |
236 | printk_log_rtas(buf, len); | |
237 | ||
238 | /* Check to see if we need to or have stopped logging */ | |
a0c7ce9c TB |
239 | if (fatal || !logging_enabled) { |
240 | logging_enabled = 0; | |
64db4cff | 241 | WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */ |
1da177e4 LT |
242 | spin_unlock_irqrestore(&rtasd_log_lock, s); |
243 | return; | |
244 | } | |
245 | ||
246 | /* call type specific method for error */ | |
247 | switch (err_type & ERR_TYPE_MASK) { | |
248 | case ERR_TYPE_RTAS_LOG: | |
249 | offset = rtas_error_log_buffer_max * | |
250 | ((rtas_log_start+rtas_log_size) & LOG_NUMBER_MASK); | |
251 | ||
252 | /* First copy over sequence number */ | |
253 | memcpy(&rtas_log_buf[offset], (void *) &error_log_cnt, sizeof(int)); | |
254 | ||
255 | /* Second copy over error log data */ | |
256 | offset += sizeof(int); | |
257 | memcpy(&rtas_log_buf[offset], buf, len); | |
258 | ||
259 | if (rtas_log_size < LOG_NUMBER) | |
260 | rtas_log_size += 1; | |
261 | else | |
262 | rtas_log_start += 1; | |
263 | ||
64db4cff | 264 | WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */ |
1da177e4 LT |
265 | spin_unlock_irqrestore(&rtasd_log_lock, s); |
266 | wake_up_interruptible(&rtas_log_wait); | |
267 | break; | |
268 | case ERR_TYPE_KERNEL_PANIC: | |
269 | default: | |
64db4cff | 270 | WARN_ON_ONCE(!irqs_disabled()); /* @@@ DEBUG @@@ */ |
1da177e4 LT |
271 | spin_unlock_irqrestore(&rtasd_log_lock, s); |
272 | return; | |
273 | } | |
49c68a85 JL |
274 | } |
275 | ||
276 | #ifdef CONFIG_PPC_PSERIES | |
cd24e457 | 277 | static void handle_prrn_event(s32 scope) |
49c68a85 JL |
278 | { |
279 | /* | |
280 | * For PRRN, we must pass the negative of the scope value in | |
281 | * the RTAS event. | |
282 | */ | |
cd24e457 | 283 | pseries_devicetree_update(-scope); |
3e401f7a | 284 | numa_update_cpu_topology(false); |
49c68a85 JL |
285 | } |
286 | ||
49c68a85 JL |
287 | static void handle_rtas_event(const struct rtas_error_log *log) |
288 | { | |
a08a53ea GK |
289 | if (rtas_error_type(log) != RTAS_TYPE_PRRN || !prrn_is_enabled()) |
290 | return; | |
49c68a85 | 291 | |
a08a53ea GK |
292 | /* For PRRN Events the extended log length is used to denote |
293 | * the scope for calling rtas update-nodes. | |
294 | */ | |
cd24e457 | 295 | handle_prrn_event(rtas_error_extended_log_length(log)); |
49c68a85 JL |
296 | } |
297 | ||
298 | #else | |
1da177e4 | 299 | |
49c68a85 JL |
300 | static void handle_rtas_event(const struct rtas_error_log *log) |
301 | { | |
302 | return; | |
1da177e4 LT |
303 | } |
304 | ||
49c68a85 JL |
305 | #endif |
306 | ||
1da177e4 LT |
307 | static int rtas_log_open(struct inode * inode, struct file * file) |
308 | { | |
309 | return 0; | |
310 | } | |
311 | ||
312 | static int rtas_log_release(struct inode * inode, struct file * file) | |
313 | { | |
314 | return 0; | |
315 | } | |
316 | ||
317 | /* This will check if all events are logged, if they are then, we | |
318 | * know that we can safely clear the events in NVRAM. | |
319 | * Next we'll sit and wait for something else to log. | |
320 | */ | |
321 | static ssize_t rtas_log_read(struct file * file, char __user * buf, | |
322 | size_t count, loff_t *ppos) | |
323 | { | |
324 | int error; | |
325 | char *tmp; | |
326 | unsigned long s; | |
327 | unsigned long offset; | |
328 | ||
329 | if (!buf || count < rtas_error_log_buffer_max) | |
330 | return -EINVAL; | |
331 | ||
332 | count = rtas_error_log_buffer_max; | |
333 | ||
334 | if (!access_ok(VERIFY_WRITE, buf, count)) | |
335 | return -EFAULT; | |
336 | ||
337 | tmp = kmalloc(count, GFP_KERNEL); | |
338 | if (!tmp) | |
339 | return -ENOMEM; | |
340 | ||
1da177e4 | 341 | spin_lock_irqsave(&rtasd_log_lock, s); |
3d541c4b | 342 | |
1da177e4 | 343 | /* if it's 0, then we know we got the last one (the one in NVRAM) */ |
76c31f23 VM |
344 | while (rtas_log_size == 0) { |
345 | if (file->f_flags & O_NONBLOCK) { | |
346 | spin_unlock_irqrestore(&rtasd_log_lock, s); | |
347 | error = -EAGAIN; | |
348 | goto out; | |
349 | } | |
1da177e4 | 350 | |
76c31f23 VM |
351 | if (!logging_enabled) { |
352 | spin_unlock_irqrestore(&rtasd_log_lock, s); | |
353 | error = -ENODATA; | |
354 | goto out; | |
355 | } | |
3d541c4b | 356 | #ifdef CONFIG_PPC64 |
76c31f23 | 357 | nvram_clear_error_log(); |
3d541c4b | 358 | #endif /* CONFIG_PPC64 */ |
1da177e4 | 359 | |
76c31f23 VM |
360 | spin_unlock_irqrestore(&rtasd_log_lock, s); |
361 | error = wait_event_interruptible(rtas_log_wait, rtas_log_size); | |
362 | if (error) | |
363 | goto out; | |
364 | spin_lock_irqsave(&rtasd_log_lock, s); | |
365 | } | |
1da177e4 | 366 | |
1da177e4 LT |
367 | offset = rtas_error_log_buffer_max * (rtas_log_start & LOG_NUMBER_MASK); |
368 | memcpy(tmp, &rtas_log_buf[offset], count); | |
369 | ||
370 | rtas_log_start += 1; | |
371 | rtas_log_size -= 1; | |
372 | spin_unlock_irqrestore(&rtasd_log_lock, s); | |
373 | ||
374 | error = copy_to_user(buf, tmp, count) ? -EFAULT : count; | |
375 | out: | |
376 | kfree(tmp); | |
377 | return error; | |
378 | } | |
379 | ||
8153a5ea | 380 | static __poll_t rtas_log_poll(struct file *file, poll_table * wait) |
1da177e4 LT |
381 | { |
382 | poll_wait(file, &rtas_log_wait, wait); | |
383 | if (rtas_log_size) | |
a9a08845 | 384 | return EPOLLIN | EPOLLRDNORM; |
1da177e4 LT |
385 | return 0; |
386 | } | |
387 | ||
541b2755 | 388 | static const struct file_operations proc_rtas_log_operations = { |
1da177e4 LT |
389 | .read = rtas_log_read, |
390 | .poll = rtas_log_poll, | |
391 | .open = rtas_log_open, | |
392 | .release = rtas_log_release, | |
6038f373 | 393 | .llseek = noop_llseek, |
1da177e4 LT |
394 | }; |
395 | ||
396 | static int enable_surveillance(int timeout) | |
397 | { | |
398 | int error; | |
399 | ||
400 | error = rtas_set_indicator(SURVEILLANCE_TOKEN, 0, timeout); | |
401 | ||
402 | if (error == 0) | |
403 | return 0; | |
404 | ||
405 | if (error == -EINVAL) { | |
90ddfebe | 406 | printk(KERN_DEBUG "rtasd: surveillance not supported\n"); |
1da177e4 LT |
407 | return 0; |
408 | } | |
409 | ||
410 | printk(KERN_ERR "rtasd: could not update surveillance\n"); | |
411 | return -1; | |
412 | } | |
413 | ||
a4fc3a3c | 414 | static void do_event_scan(void) |
1da177e4 LT |
415 | { |
416 | int error; | |
417 | do { | |
418 | memset(logdata, 0, rtas_error_log_max); | |
419 | error = rtas_call(event_scan, 4, 1, NULL, | |
420 | RTAS_EVENT_SCAN_ALL_EVENTS, 0, | |
421 | __pa(logdata), rtas_error_log_max); | |
422 | if (error == -1) { | |
423 | printk(KERN_ERR "event-scan failed\n"); | |
424 | break; | |
425 | } | |
426 | ||
49c68a85 | 427 | if (error == 0) { |
675d8ee6 JA |
428 | if (rtas_error_type((struct rtas_error_log *)logdata) != |
429 | RTAS_TYPE_PRRN) | |
430 | pSeries_log_error(logdata, ERR_TYPE_RTAS_LOG, | |
431 | 0); | |
49c68a85 JL |
432 | handle_rtas_event((struct rtas_error_log *)logdata); |
433 | } | |
1da177e4 LT |
434 | |
435 | } while(error == 0); | |
436 | } | |
437 | ||
f8729e85 | 438 | static void rtas_event_scan(struct work_struct *w); |
635218c7 | 439 | static DECLARE_DELAYED_WORK(event_scan_work, rtas_event_scan); |
f8729e85 AB |
440 | |
441 | /* | |
442 | * Delay should be at least one second since some machines have problems if | |
443 | * we call event-scan too quickly. | |
444 | */ | |
445 | static unsigned long event_scan_delay = 1*HZ; | |
446 | static int first_pass = 1; | |
447 | ||
448 | static void rtas_event_scan(struct work_struct *w) | |
1da177e4 | 449 | { |
f8729e85 AB |
450 | unsigned int cpu; |
451 | ||
452 | do_event_scan(); | |
1da177e4 | 453 | |
86ef5c9a | 454 | get_online_cpus(); |
f8729e85 | 455 | |
9ff0c61d PM |
456 | /* raw_ OK because just using CPU as starting point. */ |
457 | cpu = cpumask_next(raw_smp_processor_id(), cpu_online_mask); | |
d5f86fe3 AB |
458 | if (cpu >= nr_cpu_ids) { |
459 | cpu = cpumask_first(cpu_online_mask); | |
f8729e85 AB |
460 | |
461 | if (first_pass) { | |
462 | first_pass = 0; | |
463 | event_scan_delay = 30*HZ/rtas_event_scan_rate; | |
464 | ||
465 | if (surveillance_timeout != -1) { | |
466 | pr_debug("rtasd: enabling surveillance\n"); | |
467 | enable_surveillance(surveillance_timeout); | |
468 | pr_debug("rtasd: surveillance enabled\n"); | |
469 | } | |
470 | } | |
1da177e4 | 471 | } |
f8729e85 AB |
472 | |
473 | schedule_delayed_work_on(cpu, &event_scan_work, | |
474 | __round_jiffies_relative(event_scan_delay, cpu)); | |
475 | ||
86ef5c9a | 476 | put_online_cpus(); |
1da177e4 LT |
477 | } |
478 | ||
3d541c4b | 479 | #ifdef CONFIG_PPC64 |
6e45273e | 480 | static void retrieve_nvram_error_log(void) |
1da177e4 | 481 | { |
3d541c4b BH |
482 | unsigned int err_type ; |
483 | int rc ; | |
1da177e4 LT |
484 | |
485 | /* See if we have any error stored in NVRAM */ | |
486 | memset(logdata, 0, rtas_error_log_max); | |
0f2342c8 LV |
487 | rc = nvram_read_error_log(logdata, rtas_error_log_max, |
488 | &err_type, &error_log_cnt); | |
a0c7ce9c TB |
489 | /* We can use rtas_log_buf now */ |
490 | logging_enabled = 1; | |
1da177e4 LT |
491 | if (!rc) { |
492 | if (err_type != ERR_FLAG_ALREADY_LOGGED) { | |
493 | pSeries_log_error(logdata, err_type | ERR_FLAG_BOOT, 0); | |
494 | } | |
495 | } | |
3d541c4b BH |
496 | } |
497 | #else /* CONFIG_PPC64 */ | |
6e45273e | 498 | static void retrieve_nvram_error_log(void) |
3d541c4b BH |
499 | { |
500 | } | |
501 | #endif /* CONFIG_PPC64 */ | |
502 | ||
503 | static void start_event_scan(void) | |
504 | { | |
505 | printk(KERN_DEBUG "RTAS daemon started\n"); | |
506 | pr_debug("rtasd: will sleep for %d milliseconds\n", | |
507 | (30000 / rtas_event_scan_rate)); | |
508 | ||
25985edc | 509 | /* Retrieve errors from nvram if any */ |
6e45273e | 510 | retrieve_nvram_error_log(); |
1da177e4 | 511 | |
d5f86fe3 AB |
512 | schedule_delayed_work_on(cpumask_first(cpu_online_mask), |
513 | &event_scan_work, event_scan_delay); | |
1da177e4 LT |
514 | } |
515 | ||
df17f56d RN |
516 | /* Cancel the rtas event scan work */ |
517 | void rtas_cancel_event_scan(void) | |
518 | { | |
519 | cancel_delayed_work_sync(&event_scan_work); | |
520 | } | |
521 | EXPORT_SYMBOL_GPL(rtas_cancel_event_scan); | |
522 | ||
8c6a0a1f | 523 | static int __init rtas_event_scan_init(void) |
1da177e4 | 524 | { |
3d541c4b | 525 | if (!machine_is(pseries) && !machine_is(chrp)) |
799d6046 PM |
526 | return 0; |
527 | ||
528 | /* No RTAS */ | |
a4fc3a3c LV |
529 | event_scan = rtas_token("event-scan"); |
530 | if (event_scan == RTAS_UNKNOWN_SERVICE) { | |
3d541c4b | 531 | printk(KERN_INFO "rtasd: No event-scan on system\n"); |
49c28e4e | 532 | return -ENODEV; |
1da177e4 LT |
533 | } |
534 | ||
4511dad4 LV |
535 | rtas_event_scan_rate = rtas_token("rtas-event-scan-rate"); |
536 | if (rtas_event_scan_rate == RTAS_UNKNOWN_SERVICE) { | |
537 | printk(KERN_ERR "rtasd: no rtas-event-scan-rate on system\n"); | |
538 | return -ENODEV; | |
539 | } | |
540 | ||
7358650e ME |
541 | if (!rtas_event_scan_rate) { |
542 | /* Broken firmware: take a rate of zero to mean don't scan */ | |
543 | printk(KERN_DEBUG "rtasd: scan rate is 0, not scanning\n"); | |
544 | return 0; | |
545 | } | |
546 | ||
4511dad4 LV |
547 | /* Make room for the sequence number */ |
548 | rtas_error_log_max = rtas_get_error_log_max(); | |
549 | rtas_error_log_buffer_max = rtas_error_log_max + sizeof(int); | |
550 | ||
42bc47b3 KC |
551 | rtas_log_buf = vmalloc(array_size(LOG_NUMBER, |
552 | rtas_error_log_buffer_max)); | |
4511dad4 LV |
553 | if (!rtas_log_buf) { |
554 | printk(KERN_ERR "rtasd: no memory\n"); | |
555 | return -ENOMEM; | |
556 | } | |
557 | ||
8c6a0a1f GK |
558 | start_event_scan(); |
559 | ||
560 | return 0; | |
561 | } | |
562 | arch_initcall(rtas_event_scan_init); | |
563 | ||
564 | static int __init rtas_init(void) | |
565 | { | |
566 | struct proc_dir_entry *entry; | |
567 | ||
568 | if (!machine_is(pseries) && !machine_is(chrp)) | |
569 | return 0; | |
570 | ||
571 | if (!rtas_log_buf) | |
572 | return -ENODEV; | |
573 | ||
57ad583f | 574 | entry = proc_create("powerpc/rtas/error_log", 0400, NULL, |
66747138 DL |
575 | &proc_rtas_log_operations); |
576 | if (!entry) | |
1da177e4 LT |
577 | printk(KERN_ERR "Failed to create error_log proc entry\n"); |
578 | ||
1da177e4 LT |
579 | return 0; |
580 | } | |
3d541c4b | 581 | __initcall(rtas_init); |
1da177e4 LT |
582 | |
583 | static int __init surveillance_setup(char *str) | |
584 | { | |
585 | int i; | |
586 | ||
3d541c4b BH |
587 | /* We only do surveillance on pseries */ |
588 | if (!machine_is(pseries)) | |
589 | return 0; | |
590 | ||
1da177e4 LT |
591 | if (get_option(&str,&i)) { |
592 | if (i >= 0 && i <= 255) | |
593 | surveillance_timeout = i; | |
594 | } | |
595 | ||
596 | return 1; | |
597 | } | |
3d541c4b | 598 | __setup("surveillance=", surveillance_setup); |
1da177e4 LT |
599 | |
600 | static int __init rtasmsgs_setup(char *str) | |
601 | { | |
4cc7ecb7 | 602 | return (kstrtobool(str, &full_rtas_msgs) == 0); |
1da177e4 | 603 | } |
1da177e4 | 604 | __setup("rtasmsgs=", rtasmsgs_setup); |