Commit | Line | Data |
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a08f82d0 HY |
1 | /* |
2 | * APEI Error Record Serialization Table support | |
3 | * | |
4 | * ERST is a way provided by APEI to save and retrieve hardware error | |
58f87ed0 | 5 | * information to and from a persistent store. |
a08f82d0 HY |
6 | * |
7 | * For more information about ERST, please refer to ACPI Specification | |
8 | * version 4.0, section 17.4. | |
9 | * | |
10 | * Copyright 2010 Intel Corp. | |
11 | * Author: Huang Ying <ying.huang@intel.com> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or | |
14 | * modify it under the terms of the GNU General Public License version | |
15 | * 2 as published by the Free Software Foundation. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
a08f82d0 HY |
21 | */ |
22 | ||
23 | #include <linux/kernel.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/delay.h> | |
27 | #include <linux/io.h> | |
28 | #include <linux/acpi.h> | |
29 | #include <linux/uaccess.h> | |
30 | #include <linux/cper.h> | |
31 | #include <linux/nmi.h> | |
0a7992c9 | 32 | #include <linux/hardirq.h> |
0bb77c46 | 33 | #include <linux/pstore.h> |
d6472302 | 34 | #include <linux/vmalloc.h> |
1d5cfdb0 | 35 | #include <linux/mm.h> /* kvfree() */ |
a08f82d0 HY |
36 | #include <acpi/apei.h> |
37 | ||
38 | #include "apei-internal.h" | |
39 | ||
cb82a2e4 BP |
40 | #undef pr_fmt |
41 | #define pr_fmt(fmt) "ERST: " fmt | |
a08f82d0 HY |
42 | |
43 | /* ERST command status */ | |
44 | #define ERST_STATUS_SUCCESS 0x0 | |
45 | #define ERST_STATUS_NOT_ENOUGH_SPACE 0x1 | |
46 | #define ERST_STATUS_HARDWARE_NOT_AVAILABLE 0x2 | |
47 | #define ERST_STATUS_FAILED 0x3 | |
48 | #define ERST_STATUS_RECORD_STORE_EMPTY 0x4 | |
49 | #define ERST_STATUS_RECORD_NOT_FOUND 0x5 | |
50 | ||
51 | #define ERST_TAB_ENTRY(tab) \ | |
52 | ((struct acpi_whea_header *)((char *)(tab) + \ | |
53 | sizeof(struct acpi_table_erst))) | |
54 | ||
55 | #define SPIN_UNIT 100 /* 100ns */ | |
e8a8b252 | 56 | /* Firmware should respond within 1 milliseconds */ |
a08f82d0 HY |
57 | #define FIRMWARE_TIMEOUT (1 * NSEC_PER_MSEC) |
58 | #define FIRMWARE_MAX_STALL 50 /* 50us */ | |
59 | ||
60 | int erst_disable; | |
61 | EXPORT_SYMBOL_GPL(erst_disable); | |
62 | ||
63 | static struct acpi_table_erst *erst_tab; | |
64 | ||
65 | /* ERST Error Log Address Range atrributes */ | |
66 | #define ERST_RANGE_RESERVED 0x0001 | |
67 | #define ERST_RANGE_NVRAM 0x0002 | |
68 | #define ERST_RANGE_SLOW 0x0004 | |
69 | ||
70 | /* | |
71 | * ERST Error Log Address Range, used as buffer for reading/writing | |
72 | * error records. | |
73 | */ | |
74 | static struct erst_erange { | |
75 | u64 base; | |
76 | u64 size; | |
77 | void __iomem *vaddr; | |
78 | u32 attr; | |
79 | } erst_erange; | |
80 | ||
81 | /* | |
82 | * Prevent ERST interpreter to run simultaneously, because the | |
83 | * corresponding firmware implementation may not work properly when | |
84 | * invoked simultaneously. | |
85 | * | |
86 | * It is used to provide exclusive accessing for ERST Error Log | |
87 | * Address Range too. | |
88 | */ | |
3b38bb5f | 89 | static DEFINE_RAW_SPINLOCK(erst_lock); |
a08f82d0 HY |
90 | |
91 | static inline int erst_errno(int command_status) | |
92 | { | |
93 | switch (command_status) { | |
94 | case ERST_STATUS_SUCCESS: | |
95 | return 0; | |
96 | case ERST_STATUS_HARDWARE_NOT_AVAILABLE: | |
97 | return -ENODEV; | |
98 | case ERST_STATUS_NOT_ENOUGH_SPACE: | |
99 | return -ENOSPC; | |
100 | case ERST_STATUS_RECORD_STORE_EMPTY: | |
101 | case ERST_STATUS_RECORD_NOT_FOUND: | |
102 | return -ENOENT; | |
103 | default: | |
104 | return -EINVAL; | |
105 | } | |
106 | } | |
107 | ||
108 | static int erst_timedout(u64 *t, u64 spin_unit) | |
109 | { | |
110 | if ((s64)*t < spin_unit) { | |
cb82a2e4 | 111 | pr_warn(FW_WARN "Firmware does not respond in time.\n"); |
a08f82d0 HY |
112 | return 1; |
113 | } | |
114 | *t -= spin_unit; | |
115 | ndelay(spin_unit); | |
116 | touch_nmi_watchdog(); | |
117 | return 0; | |
118 | } | |
119 | ||
120 | static int erst_exec_load_var1(struct apei_exec_context *ctx, | |
121 | struct acpi_whea_header *entry) | |
122 | { | |
123 | return __apei_exec_read_register(entry, &ctx->var1); | |
124 | } | |
125 | ||
126 | static int erst_exec_load_var2(struct apei_exec_context *ctx, | |
127 | struct acpi_whea_header *entry) | |
128 | { | |
129 | return __apei_exec_read_register(entry, &ctx->var2); | |
130 | } | |
131 | ||
132 | static int erst_exec_store_var1(struct apei_exec_context *ctx, | |
133 | struct acpi_whea_header *entry) | |
134 | { | |
135 | return __apei_exec_write_register(entry, ctx->var1); | |
136 | } | |
137 | ||
138 | static int erst_exec_add(struct apei_exec_context *ctx, | |
139 | struct acpi_whea_header *entry) | |
140 | { | |
141 | ctx->var1 += ctx->var2; | |
142 | return 0; | |
143 | } | |
144 | ||
145 | static int erst_exec_subtract(struct apei_exec_context *ctx, | |
146 | struct acpi_whea_header *entry) | |
147 | { | |
148 | ctx->var1 -= ctx->var2; | |
149 | return 0; | |
150 | } | |
151 | ||
152 | static int erst_exec_add_value(struct apei_exec_context *ctx, | |
153 | struct acpi_whea_header *entry) | |
154 | { | |
155 | int rc; | |
156 | u64 val; | |
157 | ||
158 | rc = __apei_exec_read_register(entry, &val); | |
159 | if (rc) | |
160 | return rc; | |
161 | val += ctx->value; | |
162 | rc = __apei_exec_write_register(entry, val); | |
163 | return rc; | |
164 | } | |
165 | ||
166 | static int erst_exec_subtract_value(struct apei_exec_context *ctx, | |
167 | struct acpi_whea_header *entry) | |
168 | { | |
169 | int rc; | |
170 | u64 val; | |
171 | ||
172 | rc = __apei_exec_read_register(entry, &val); | |
173 | if (rc) | |
174 | return rc; | |
175 | val -= ctx->value; | |
176 | rc = __apei_exec_write_register(entry, val); | |
177 | return rc; | |
178 | } | |
179 | ||
180 | static int erst_exec_stall(struct apei_exec_context *ctx, | |
181 | struct acpi_whea_header *entry) | |
182 | { | |
183 | u64 stall_time; | |
184 | ||
185 | if (ctx->value > FIRMWARE_MAX_STALL) { | |
186 | if (!in_nmi()) | |
cb82a2e4 BP |
187 | pr_warn(FW_WARN |
188 | "Too long stall time for stall instruction: 0x%llx.\n", | |
a08f82d0 HY |
189 | ctx->value); |
190 | stall_time = FIRMWARE_MAX_STALL; | |
191 | } else | |
192 | stall_time = ctx->value; | |
193 | udelay(stall_time); | |
194 | return 0; | |
195 | } | |
196 | ||
197 | static int erst_exec_stall_while_true(struct apei_exec_context *ctx, | |
198 | struct acpi_whea_header *entry) | |
199 | { | |
200 | int rc; | |
201 | u64 val; | |
202 | u64 timeout = FIRMWARE_TIMEOUT; | |
203 | u64 stall_time; | |
204 | ||
205 | if (ctx->var1 > FIRMWARE_MAX_STALL) { | |
206 | if (!in_nmi()) | |
cb82a2e4 BP |
207 | pr_warn(FW_WARN |
208 | "Too long stall time for stall while true instruction: 0x%llx.\n", | |
a08f82d0 HY |
209 | ctx->var1); |
210 | stall_time = FIRMWARE_MAX_STALL; | |
211 | } else | |
212 | stall_time = ctx->var1; | |
213 | ||
214 | for (;;) { | |
215 | rc = __apei_exec_read_register(entry, &val); | |
216 | if (rc) | |
217 | return rc; | |
218 | if (val != ctx->value) | |
219 | break; | |
220 | if (erst_timedout(&timeout, stall_time * NSEC_PER_USEC)) | |
221 | return -EIO; | |
222 | } | |
223 | return 0; | |
224 | } | |
225 | ||
226 | static int erst_exec_skip_next_instruction_if_true( | |
227 | struct apei_exec_context *ctx, | |
228 | struct acpi_whea_header *entry) | |
229 | { | |
230 | int rc; | |
231 | u64 val; | |
232 | ||
233 | rc = __apei_exec_read_register(entry, &val); | |
234 | if (rc) | |
235 | return rc; | |
236 | if (val == ctx->value) { | |
237 | ctx->ip += 2; | |
238 | return APEI_EXEC_SET_IP; | |
239 | } | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
244 | static int erst_exec_goto(struct apei_exec_context *ctx, | |
245 | struct acpi_whea_header *entry) | |
246 | { | |
247 | ctx->ip = ctx->value; | |
248 | return APEI_EXEC_SET_IP; | |
249 | } | |
250 | ||
251 | static int erst_exec_set_src_address_base(struct apei_exec_context *ctx, | |
252 | struct acpi_whea_header *entry) | |
253 | { | |
254 | return __apei_exec_read_register(entry, &ctx->src_base); | |
255 | } | |
256 | ||
257 | static int erst_exec_set_dst_address_base(struct apei_exec_context *ctx, | |
258 | struct acpi_whea_header *entry) | |
259 | { | |
260 | return __apei_exec_read_register(entry, &ctx->dst_base); | |
261 | } | |
262 | ||
263 | static int erst_exec_move_data(struct apei_exec_context *ctx, | |
264 | struct acpi_whea_header *entry) | |
265 | { | |
266 | int rc; | |
267 | u64 offset; | |
0bbba38a HY |
268 | void *src, *dst; |
269 | ||
270 | /* ioremap does not work in interrupt context */ | |
271 | if (in_interrupt()) { | |
cb82a2e4 | 272 | pr_warn("MOVE_DATA can not be used in interrupt context.\n"); |
0bbba38a HY |
273 | return -EBUSY; |
274 | } | |
a08f82d0 HY |
275 | |
276 | rc = __apei_exec_read_register(entry, &offset); | |
277 | if (rc) | |
278 | return rc; | |
0bbba38a HY |
279 | |
280 | src = ioremap(ctx->src_base + offset, ctx->var2); | |
281 | if (!src) | |
282 | return -ENOMEM; | |
283 | dst = ioremap(ctx->dst_base + offset, ctx->var2); | |
08b326d0 WY |
284 | if (!dst) { |
285 | iounmap(src); | |
0bbba38a | 286 | return -ENOMEM; |
08b326d0 | 287 | } |
0bbba38a HY |
288 | |
289 | memmove(dst, src, ctx->var2); | |
290 | ||
291 | iounmap(src); | |
292 | iounmap(dst); | |
a08f82d0 HY |
293 | |
294 | return 0; | |
295 | } | |
296 | ||
297 | static struct apei_exec_ins_type erst_ins_type[] = { | |
298 | [ACPI_ERST_READ_REGISTER] = { | |
299 | .flags = APEI_EXEC_INS_ACCESS_REGISTER, | |
300 | .run = apei_exec_read_register, | |
301 | }, | |
302 | [ACPI_ERST_READ_REGISTER_VALUE] = { | |
303 | .flags = APEI_EXEC_INS_ACCESS_REGISTER, | |
304 | .run = apei_exec_read_register_value, | |
305 | }, | |
306 | [ACPI_ERST_WRITE_REGISTER] = { | |
307 | .flags = APEI_EXEC_INS_ACCESS_REGISTER, | |
308 | .run = apei_exec_write_register, | |
309 | }, | |
310 | [ACPI_ERST_WRITE_REGISTER_VALUE] = { | |
311 | .flags = APEI_EXEC_INS_ACCESS_REGISTER, | |
312 | .run = apei_exec_write_register_value, | |
313 | }, | |
314 | [ACPI_ERST_NOOP] = { | |
315 | .flags = 0, | |
316 | .run = apei_exec_noop, | |
317 | }, | |
318 | [ACPI_ERST_LOAD_VAR1] = { | |
319 | .flags = APEI_EXEC_INS_ACCESS_REGISTER, | |
320 | .run = erst_exec_load_var1, | |
321 | }, | |
322 | [ACPI_ERST_LOAD_VAR2] = { | |
323 | .flags = APEI_EXEC_INS_ACCESS_REGISTER, | |
324 | .run = erst_exec_load_var2, | |
325 | }, | |
326 | [ACPI_ERST_STORE_VAR1] = { | |
327 | .flags = APEI_EXEC_INS_ACCESS_REGISTER, | |
328 | .run = erst_exec_store_var1, | |
329 | }, | |
330 | [ACPI_ERST_ADD] = { | |
331 | .flags = 0, | |
332 | .run = erst_exec_add, | |
333 | }, | |
334 | [ACPI_ERST_SUBTRACT] = { | |
335 | .flags = 0, | |
336 | .run = erst_exec_subtract, | |
337 | }, | |
338 | [ACPI_ERST_ADD_VALUE] = { | |
339 | .flags = APEI_EXEC_INS_ACCESS_REGISTER, | |
340 | .run = erst_exec_add_value, | |
341 | }, | |
342 | [ACPI_ERST_SUBTRACT_VALUE] = { | |
343 | .flags = APEI_EXEC_INS_ACCESS_REGISTER, | |
344 | .run = erst_exec_subtract_value, | |
345 | }, | |
346 | [ACPI_ERST_STALL] = { | |
347 | .flags = 0, | |
348 | .run = erst_exec_stall, | |
349 | }, | |
350 | [ACPI_ERST_STALL_WHILE_TRUE] = { | |
351 | .flags = APEI_EXEC_INS_ACCESS_REGISTER, | |
352 | .run = erst_exec_stall_while_true, | |
353 | }, | |
354 | [ACPI_ERST_SKIP_NEXT_IF_TRUE] = { | |
355 | .flags = APEI_EXEC_INS_ACCESS_REGISTER, | |
356 | .run = erst_exec_skip_next_instruction_if_true, | |
357 | }, | |
358 | [ACPI_ERST_GOTO] = { | |
359 | .flags = 0, | |
360 | .run = erst_exec_goto, | |
361 | }, | |
362 | [ACPI_ERST_SET_SRC_ADDRESS_BASE] = { | |
363 | .flags = APEI_EXEC_INS_ACCESS_REGISTER, | |
364 | .run = erst_exec_set_src_address_base, | |
365 | }, | |
366 | [ACPI_ERST_SET_DST_ADDRESS_BASE] = { | |
367 | .flags = APEI_EXEC_INS_ACCESS_REGISTER, | |
368 | .run = erst_exec_set_dst_address_base, | |
369 | }, | |
370 | [ACPI_ERST_MOVE_DATA] = { | |
371 | .flags = APEI_EXEC_INS_ACCESS_REGISTER, | |
372 | .run = erst_exec_move_data, | |
373 | }, | |
374 | }; | |
375 | ||
376 | static inline void erst_exec_ctx_init(struct apei_exec_context *ctx) | |
377 | { | |
378 | apei_exec_ctx_init(ctx, erst_ins_type, ARRAY_SIZE(erst_ins_type), | |
379 | ERST_TAB_ENTRY(erst_tab), erst_tab->entries); | |
380 | } | |
381 | ||
382 | static int erst_get_erange(struct erst_erange *range) | |
383 | { | |
384 | struct apei_exec_context ctx; | |
385 | int rc; | |
386 | ||
387 | erst_exec_ctx_init(&ctx); | |
388 | rc = apei_exec_run(&ctx, ACPI_ERST_GET_ERROR_RANGE); | |
389 | if (rc) | |
390 | return rc; | |
391 | range->base = apei_exec_ctx_get_output(&ctx); | |
392 | rc = apei_exec_run(&ctx, ACPI_ERST_GET_ERROR_LENGTH); | |
393 | if (rc) | |
394 | return rc; | |
395 | range->size = apei_exec_ctx_get_output(&ctx); | |
396 | rc = apei_exec_run(&ctx, ACPI_ERST_GET_ERROR_ATTRIBUTES); | |
397 | if (rc) | |
398 | return rc; | |
399 | range->attr = apei_exec_ctx_get_output(&ctx); | |
400 | ||
401 | return 0; | |
402 | } | |
403 | ||
404 | static ssize_t __erst_get_record_count(void) | |
405 | { | |
406 | struct apei_exec_context ctx; | |
407 | int rc; | |
408 | ||
409 | erst_exec_ctx_init(&ctx); | |
410 | rc = apei_exec_run(&ctx, ACPI_ERST_GET_RECORD_COUNT); | |
411 | if (rc) | |
412 | return rc; | |
413 | return apei_exec_ctx_get_output(&ctx); | |
414 | } | |
415 | ||
416 | ssize_t erst_get_record_count(void) | |
417 | { | |
418 | ssize_t count; | |
419 | unsigned long flags; | |
420 | ||
421 | if (erst_disable) | |
422 | return -ENODEV; | |
423 | ||
3b38bb5f | 424 | raw_spin_lock_irqsave(&erst_lock, flags); |
a08f82d0 | 425 | count = __erst_get_record_count(); |
3b38bb5f | 426 | raw_spin_unlock_irqrestore(&erst_lock, flags); |
a08f82d0 HY |
427 | |
428 | return count; | |
429 | } | |
430 | EXPORT_SYMBOL_GPL(erst_get_record_count); | |
431 | ||
885b976f HY |
432 | #define ERST_RECORD_ID_CACHE_SIZE_MIN 16 |
433 | #define ERST_RECORD_ID_CACHE_SIZE_MAX 1024 | |
434 | ||
435 | struct erst_record_id_cache { | |
436 | struct mutex lock; | |
437 | u64 *entries; | |
438 | int len; | |
439 | int size; | |
440 | int refcount; | |
441 | }; | |
442 | ||
443 | static struct erst_record_id_cache erst_record_id_cache = { | |
444 | .lock = __MUTEX_INITIALIZER(erst_record_id_cache.lock), | |
445 | .refcount = 0, | |
446 | }; | |
447 | ||
a08f82d0 HY |
448 | static int __erst_get_next_record_id(u64 *record_id) |
449 | { | |
450 | struct apei_exec_context ctx; | |
451 | int rc; | |
452 | ||
453 | erst_exec_ctx_init(&ctx); | |
454 | rc = apei_exec_run(&ctx, ACPI_ERST_GET_RECORD_ID); | |
455 | if (rc) | |
456 | return rc; | |
457 | *record_id = apei_exec_ctx_get_output(&ctx); | |
458 | ||
459 | return 0; | |
460 | } | |
461 | ||
885b976f HY |
462 | int erst_get_record_id_begin(int *pos) |
463 | { | |
464 | int rc; | |
465 | ||
466 | if (erst_disable) | |
467 | return -ENODEV; | |
468 | ||
469 | rc = mutex_lock_interruptible(&erst_record_id_cache.lock); | |
470 | if (rc) | |
471 | return rc; | |
472 | erst_record_id_cache.refcount++; | |
473 | mutex_unlock(&erst_record_id_cache.lock); | |
474 | ||
475 | *pos = 0; | |
476 | ||
477 | return 0; | |
478 | } | |
479 | EXPORT_SYMBOL_GPL(erst_get_record_id_begin); | |
480 | ||
481 | /* erst_record_id_cache.lock must be held by caller */ | |
482 | static int __erst_record_id_cache_add_one(void) | |
483 | { | |
484 | u64 id, prev_id, first_id; | |
485 | int i, rc; | |
486 | u64 *entries; | |
487 | unsigned long flags; | |
488 | ||
489 | id = prev_id = first_id = APEI_ERST_INVALID_RECORD_ID; | |
490 | retry: | |
491 | raw_spin_lock_irqsave(&erst_lock, flags); | |
492 | rc = __erst_get_next_record_id(&id); | |
493 | raw_spin_unlock_irqrestore(&erst_lock, flags); | |
494 | if (rc == -ENOENT) | |
495 | return 0; | |
496 | if (rc) | |
497 | return rc; | |
498 | if (id == APEI_ERST_INVALID_RECORD_ID) | |
499 | return 0; | |
500 | /* can not skip current ID, or loop back to first ID */ | |
501 | if (id == prev_id || id == first_id) | |
502 | return 0; | |
503 | if (first_id == APEI_ERST_INVALID_RECORD_ID) | |
504 | first_id = id; | |
505 | prev_id = id; | |
506 | ||
507 | entries = erst_record_id_cache.entries; | |
508 | for (i = 0; i < erst_record_id_cache.len; i++) { | |
509 | if (entries[i] == id) | |
510 | break; | |
511 | } | |
512 | /* record id already in cache, try next */ | |
513 | if (i < erst_record_id_cache.len) | |
514 | goto retry; | |
515 | if (erst_record_id_cache.len >= erst_record_id_cache.size) { | |
516 | int new_size, alloc_size; | |
517 | u64 *new_entries; | |
518 | ||
519 | new_size = erst_record_id_cache.size * 2; | |
520 | new_size = clamp_val(new_size, ERST_RECORD_ID_CACHE_SIZE_MIN, | |
521 | ERST_RECORD_ID_CACHE_SIZE_MAX); | |
522 | if (new_size <= erst_record_id_cache.size) { | |
523 | if (printk_ratelimit()) | |
cb82a2e4 | 524 | pr_warn(FW_WARN "too many record IDs!\n"); |
885b976f HY |
525 | return 0; |
526 | } | |
527 | alloc_size = new_size * sizeof(entries[0]); | |
528 | if (alloc_size < PAGE_SIZE) | |
529 | new_entries = kmalloc(alloc_size, GFP_KERNEL); | |
530 | else | |
531 | new_entries = vmalloc(alloc_size); | |
532 | if (!new_entries) | |
533 | return -ENOMEM; | |
534 | memcpy(new_entries, entries, | |
535 | erst_record_id_cache.len * sizeof(entries[0])); | |
1d5cfdb0 | 536 | kvfree(entries); |
885b976f HY |
537 | erst_record_id_cache.entries = entries = new_entries; |
538 | erst_record_id_cache.size = new_size; | |
539 | } | |
540 | entries[i] = id; | |
541 | erst_record_id_cache.len++; | |
542 | ||
543 | return 1; | |
544 | } | |
545 | ||
a08f82d0 HY |
546 | /* |
547 | * Get the record ID of an existing error record on the persistent | |
548 | * storage. If there is no error record on the persistent storage, the | |
549 | * returned record_id is APEI_ERST_INVALID_RECORD_ID. | |
550 | */ | |
885b976f | 551 | int erst_get_record_id_next(int *pos, u64 *record_id) |
a08f82d0 | 552 | { |
885b976f HY |
553 | int rc = 0; |
554 | u64 *entries; | |
a08f82d0 HY |
555 | |
556 | if (erst_disable) | |
557 | return -ENODEV; | |
558 | ||
885b976f HY |
559 | /* must be enclosed by erst_get_record_id_begin/end */ |
560 | BUG_ON(!erst_record_id_cache.refcount); | |
561 | BUG_ON(*pos < 0 || *pos > erst_record_id_cache.len); | |
562 | ||
563 | mutex_lock(&erst_record_id_cache.lock); | |
564 | entries = erst_record_id_cache.entries; | |
565 | for (; *pos < erst_record_id_cache.len; (*pos)++) | |
566 | if (entries[*pos] != APEI_ERST_INVALID_RECORD_ID) | |
567 | break; | |
568 | /* found next record id in cache */ | |
569 | if (*pos < erst_record_id_cache.len) { | |
570 | *record_id = entries[*pos]; | |
571 | (*pos)++; | |
572 | goto out_unlock; | |
573 | } | |
574 | ||
575 | /* Try to add one more record ID to cache */ | |
576 | rc = __erst_record_id_cache_add_one(); | |
577 | if (rc < 0) | |
578 | goto out_unlock; | |
579 | /* successfully add one new ID */ | |
580 | if (rc == 1) { | |
581 | *record_id = erst_record_id_cache.entries[*pos]; | |
582 | (*pos)++; | |
583 | rc = 0; | |
584 | } else { | |
585 | *pos = -1; | |
586 | *record_id = APEI_ERST_INVALID_RECORD_ID; | |
587 | } | |
588 | out_unlock: | |
589 | mutex_unlock(&erst_record_id_cache.lock); | |
a08f82d0 HY |
590 | |
591 | return rc; | |
592 | } | |
885b976f HY |
593 | EXPORT_SYMBOL_GPL(erst_get_record_id_next); |
594 | ||
595 | /* erst_record_id_cache.lock must be held by caller */ | |
596 | static void __erst_record_id_cache_compact(void) | |
597 | { | |
598 | int i, wpos = 0; | |
599 | u64 *entries; | |
600 | ||
601 | if (erst_record_id_cache.refcount) | |
602 | return; | |
603 | ||
604 | entries = erst_record_id_cache.entries; | |
605 | for (i = 0; i < erst_record_id_cache.len; i++) { | |
606 | if (entries[i] == APEI_ERST_INVALID_RECORD_ID) | |
607 | continue; | |
608 | if (wpos != i) | |
d3ab3edc | 609 | entries[wpos] = entries[i]; |
885b976f HY |
610 | wpos++; |
611 | } | |
612 | erst_record_id_cache.len = wpos; | |
613 | } | |
614 | ||
615 | void erst_get_record_id_end(void) | |
616 | { | |
617 | /* | |
618 | * erst_disable != 0 should be detected by invoker via the | |
619 | * return value of erst_get_record_id_begin/next, so this | |
620 | * function should not be called for erst_disable != 0. | |
621 | */ | |
622 | BUG_ON(erst_disable); | |
623 | ||
624 | mutex_lock(&erst_record_id_cache.lock); | |
625 | erst_record_id_cache.refcount--; | |
626 | BUG_ON(erst_record_id_cache.refcount < 0); | |
627 | __erst_record_id_cache_compact(); | |
628 | mutex_unlock(&erst_record_id_cache.lock); | |
629 | } | |
630 | EXPORT_SYMBOL_GPL(erst_get_record_id_end); | |
a08f82d0 HY |
631 | |
632 | static int __erst_write_to_storage(u64 offset) | |
633 | { | |
634 | struct apei_exec_context ctx; | |
635 | u64 timeout = FIRMWARE_TIMEOUT; | |
636 | u64 val; | |
637 | int rc; | |
638 | ||
639 | erst_exec_ctx_init(&ctx); | |
392913de | 640 | rc = apei_exec_run_optional(&ctx, ACPI_ERST_BEGIN_WRITE); |
a08f82d0 HY |
641 | if (rc) |
642 | return rc; | |
643 | apei_exec_ctx_set_input(&ctx, offset); | |
644 | rc = apei_exec_run(&ctx, ACPI_ERST_SET_RECORD_OFFSET); | |
645 | if (rc) | |
646 | return rc; | |
647 | rc = apei_exec_run(&ctx, ACPI_ERST_EXECUTE_OPERATION); | |
648 | if (rc) | |
649 | return rc; | |
650 | for (;;) { | |
651 | rc = apei_exec_run(&ctx, ACPI_ERST_CHECK_BUSY_STATUS); | |
652 | if (rc) | |
653 | return rc; | |
654 | val = apei_exec_ctx_get_output(&ctx); | |
655 | if (!val) | |
656 | break; | |
657 | if (erst_timedout(&timeout, SPIN_UNIT)) | |
658 | return -EIO; | |
659 | } | |
660 | rc = apei_exec_run(&ctx, ACPI_ERST_GET_COMMAND_STATUS); | |
661 | if (rc) | |
662 | return rc; | |
663 | val = apei_exec_ctx_get_output(&ctx); | |
392913de | 664 | rc = apei_exec_run_optional(&ctx, ACPI_ERST_END); |
a08f82d0 HY |
665 | if (rc) |
666 | return rc; | |
667 | ||
668 | return erst_errno(val); | |
669 | } | |
670 | ||
671 | static int __erst_read_from_storage(u64 record_id, u64 offset) | |
672 | { | |
673 | struct apei_exec_context ctx; | |
674 | u64 timeout = FIRMWARE_TIMEOUT; | |
675 | u64 val; | |
676 | int rc; | |
677 | ||
678 | erst_exec_ctx_init(&ctx); | |
392913de | 679 | rc = apei_exec_run_optional(&ctx, ACPI_ERST_BEGIN_READ); |
a08f82d0 HY |
680 | if (rc) |
681 | return rc; | |
682 | apei_exec_ctx_set_input(&ctx, offset); | |
683 | rc = apei_exec_run(&ctx, ACPI_ERST_SET_RECORD_OFFSET); | |
684 | if (rc) | |
685 | return rc; | |
686 | apei_exec_ctx_set_input(&ctx, record_id); | |
687 | rc = apei_exec_run(&ctx, ACPI_ERST_SET_RECORD_ID); | |
688 | if (rc) | |
689 | return rc; | |
690 | rc = apei_exec_run(&ctx, ACPI_ERST_EXECUTE_OPERATION); | |
691 | if (rc) | |
692 | return rc; | |
693 | for (;;) { | |
694 | rc = apei_exec_run(&ctx, ACPI_ERST_CHECK_BUSY_STATUS); | |
695 | if (rc) | |
696 | return rc; | |
697 | val = apei_exec_ctx_get_output(&ctx); | |
698 | if (!val) | |
699 | break; | |
700 | if (erst_timedout(&timeout, SPIN_UNIT)) | |
701 | return -EIO; | |
702 | }; | |
703 | rc = apei_exec_run(&ctx, ACPI_ERST_GET_COMMAND_STATUS); | |
704 | if (rc) | |
705 | return rc; | |
706 | val = apei_exec_ctx_get_output(&ctx); | |
392913de | 707 | rc = apei_exec_run_optional(&ctx, ACPI_ERST_END); |
a08f82d0 HY |
708 | if (rc) |
709 | return rc; | |
710 | ||
711 | return erst_errno(val); | |
712 | } | |
713 | ||
714 | static int __erst_clear_from_storage(u64 record_id) | |
715 | { | |
716 | struct apei_exec_context ctx; | |
717 | u64 timeout = FIRMWARE_TIMEOUT; | |
718 | u64 val; | |
719 | int rc; | |
720 | ||
721 | erst_exec_ctx_init(&ctx); | |
392913de | 722 | rc = apei_exec_run_optional(&ctx, ACPI_ERST_BEGIN_CLEAR); |
a08f82d0 HY |
723 | if (rc) |
724 | return rc; | |
725 | apei_exec_ctx_set_input(&ctx, record_id); | |
726 | rc = apei_exec_run(&ctx, ACPI_ERST_SET_RECORD_ID); | |
727 | if (rc) | |
728 | return rc; | |
729 | rc = apei_exec_run(&ctx, ACPI_ERST_EXECUTE_OPERATION); | |
730 | if (rc) | |
731 | return rc; | |
732 | for (;;) { | |
733 | rc = apei_exec_run(&ctx, ACPI_ERST_CHECK_BUSY_STATUS); | |
734 | if (rc) | |
735 | return rc; | |
736 | val = apei_exec_ctx_get_output(&ctx); | |
737 | if (!val) | |
738 | break; | |
739 | if (erst_timedout(&timeout, SPIN_UNIT)) | |
740 | return -EIO; | |
741 | } | |
742 | rc = apei_exec_run(&ctx, ACPI_ERST_GET_COMMAND_STATUS); | |
743 | if (rc) | |
744 | return rc; | |
745 | val = apei_exec_ctx_get_output(&ctx); | |
392913de | 746 | rc = apei_exec_run_optional(&ctx, ACPI_ERST_END); |
a08f82d0 HY |
747 | if (rc) |
748 | return rc; | |
749 | ||
750 | return erst_errno(val); | |
751 | } | |
752 | ||
753 | /* NVRAM ERST Error Log Address Range is not supported yet */ | |
754 | static void pr_unimpl_nvram(void) | |
755 | { | |
756 | if (printk_ratelimit()) | |
cb82a2e4 | 757 | pr_warn("NVRAM ERST Log Address Range not implemented yet.\n"); |
a08f82d0 HY |
758 | } |
759 | ||
760 | static int __erst_write_to_nvram(const struct cper_record_header *record) | |
761 | { | |
762 | /* do not print message, because printk is not safe for NMI */ | |
763 | return -ENOSYS; | |
764 | } | |
765 | ||
766 | static int __erst_read_to_erange_from_nvram(u64 record_id, u64 *offset) | |
767 | { | |
768 | pr_unimpl_nvram(); | |
769 | return -ENOSYS; | |
770 | } | |
771 | ||
772 | static int __erst_clear_from_nvram(u64 record_id) | |
773 | { | |
774 | pr_unimpl_nvram(); | |
775 | return -ENOSYS; | |
776 | } | |
777 | ||
778 | int erst_write(const struct cper_record_header *record) | |
779 | { | |
780 | int rc; | |
781 | unsigned long flags; | |
782 | struct cper_record_header *rcd_erange; | |
783 | ||
784 | if (erst_disable) | |
785 | return -ENODEV; | |
786 | ||
787 | if (memcmp(record->signature, CPER_SIG_RECORD, CPER_SIG_SIZE)) | |
788 | return -EINVAL; | |
789 | ||
790 | if (erst_erange.attr & ERST_RANGE_NVRAM) { | |
3b38bb5f | 791 | if (!raw_spin_trylock_irqsave(&erst_lock, flags)) |
a08f82d0 HY |
792 | return -EBUSY; |
793 | rc = __erst_write_to_nvram(record); | |
3b38bb5f | 794 | raw_spin_unlock_irqrestore(&erst_lock, flags); |
a08f82d0 HY |
795 | return rc; |
796 | } | |
797 | ||
798 | if (record->record_length > erst_erange.size) | |
799 | return -EINVAL; | |
800 | ||
3b38bb5f | 801 | if (!raw_spin_trylock_irqsave(&erst_lock, flags)) |
a08f82d0 HY |
802 | return -EBUSY; |
803 | memcpy(erst_erange.vaddr, record, record->record_length); | |
804 | rcd_erange = erst_erange.vaddr; | |
805 | /* signature for serialization system */ | |
806 | memcpy(&rcd_erange->persistence_information, "ER", 2); | |
807 | ||
808 | rc = __erst_write_to_storage(0); | |
3b38bb5f | 809 | raw_spin_unlock_irqrestore(&erst_lock, flags); |
a08f82d0 HY |
810 | |
811 | return rc; | |
812 | } | |
813 | EXPORT_SYMBOL_GPL(erst_write); | |
814 | ||
815 | static int __erst_read_to_erange(u64 record_id, u64 *offset) | |
816 | { | |
817 | int rc; | |
818 | ||
819 | if (erst_erange.attr & ERST_RANGE_NVRAM) | |
820 | return __erst_read_to_erange_from_nvram( | |
821 | record_id, offset); | |
822 | ||
823 | rc = __erst_read_from_storage(record_id, 0); | |
824 | if (rc) | |
825 | return rc; | |
826 | *offset = 0; | |
827 | ||
828 | return 0; | |
829 | } | |
830 | ||
831 | static ssize_t __erst_read(u64 record_id, struct cper_record_header *record, | |
832 | size_t buflen) | |
833 | { | |
834 | int rc; | |
835 | u64 offset, len = 0; | |
836 | struct cper_record_header *rcd_tmp; | |
837 | ||
838 | rc = __erst_read_to_erange(record_id, &offset); | |
839 | if (rc) | |
840 | return rc; | |
841 | rcd_tmp = erst_erange.vaddr + offset; | |
842 | len = rcd_tmp->record_length; | |
843 | if (len <= buflen) | |
844 | memcpy(record, rcd_tmp, len); | |
845 | ||
846 | return len; | |
847 | } | |
848 | ||
849 | /* | |
850 | * If return value > buflen, the buffer size is not big enough, | |
851 | * else if return value < 0, something goes wrong, | |
852 | * else everything is OK, and return value is record length | |
853 | */ | |
854 | ssize_t erst_read(u64 record_id, struct cper_record_header *record, | |
855 | size_t buflen) | |
856 | { | |
857 | ssize_t len; | |
858 | unsigned long flags; | |
859 | ||
860 | if (erst_disable) | |
861 | return -ENODEV; | |
862 | ||
3b38bb5f | 863 | raw_spin_lock_irqsave(&erst_lock, flags); |
a08f82d0 | 864 | len = __erst_read(record_id, record, buflen); |
3b38bb5f | 865 | raw_spin_unlock_irqrestore(&erst_lock, flags); |
a08f82d0 HY |
866 | return len; |
867 | } | |
868 | EXPORT_SYMBOL_GPL(erst_read); | |
869 | ||
a08f82d0 HY |
870 | int erst_clear(u64 record_id) |
871 | { | |
885b976f | 872 | int rc, i; |
a08f82d0 | 873 | unsigned long flags; |
885b976f | 874 | u64 *entries; |
a08f82d0 HY |
875 | |
876 | if (erst_disable) | |
877 | return -ENODEV; | |
878 | ||
885b976f HY |
879 | rc = mutex_lock_interruptible(&erst_record_id_cache.lock); |
880 | if (rc) | |
881 | return rc; | |
3b38bb5f | 882 | raw_spin_lock_irqsave(&erst_lock, flags); |
a08f82d0 HY |
883 | if (erst_erange.attr & ERST_RANGE_NVRAM) |
884 | rc = __erst_clear_from_nvram(record_id); | |
885 | else | |
886 | rc = __erst_clear_from_storage(record_id); | |
3b38bb5f | 887 | raw_spin_unlock_irqrestore(&erst_lock, flags); |
885b976f HY |
888 | if (rc) |
889 | goto out; | |
890 | entries = erst_record_id_cache.entries; | |
891 | for (i = 0; i < erst_record_id_cache.len; i++) { | |
892 | if (entries[i] == record_id) | |
893 | entries[i] = APEI_ERST_INVALID_RECORD_ID; | |
894 | } | |
895 | __erst_record_id_cache_compact(); | |
896 | out: | |
897 | mutex_unlock(&erst_record_id_cache.lock); | |
a08f82d0 HY |
898 | return rc; |
899 | } | |
900 | EXPORT_SYMBOL_GPL(erst_clear); | |
901 | ||
902 | static int __init setup_erst_disable(char *str) | |
903 | { | |
904 | erst_disable = 1; | |
905 | return 0; | |
906 | } | |
907 | ||
908 | __setup("erst_disable", setup_erst_disable); | |
909 | ||
910 | static int erst_check_table(struct acpi_table_erst *erst_tab) | |
911 | { | |
3a78f965 HY |
912 | if ((erst_tab->header_length != |
913 | (sizeof(struct acpi_table_erst) - sizeof(erst_tab->header))) | |
7ed28f2e | 914 | && (erst_tab->header_length != sizeof(struct acpi_table_erst))) |
a08f82d0 HY |
915 | return -EINVAL; |
916 | if (erst_tab->header.length < sizeof(struct acpi_table_erst)) | |
917 | return -EINVAL; | |
918 | if (erst_tab->entries != | |
919 | (erst_tab->header.length - sizeof(struct acpi_table_erst)) / | |
920 | sizeof(struct acpi_erst_entry)) | |
921 | return -EINVAL; | |
922 | ||
923 | return 0; | |
924 | } | |
925 | ||
06cf91b4 CG |
926 | static int erst_open_pstore(struct pstore_info *psi); |
927 | static int erst_close_pstore(struct pstore_info *psi); | |
755d4fe4 | 928 | static ssize_t erst_reader(u64 *id, enum pstore_type_id *type, int *count, |
f6f82851 | 929 | struct timespec *time, char **buf, |
9a4e1398 | 930 | bool *compressed, struct pstore_info *psi); |
3d6d8d20 | 931 | static int erst_writer(enum pstore_type_id type, enum kmsg_dump_reason reason, |
b3b515bb | 932 | u64 *id, unsigned int part, int count, bool compressed, |
b94fdd07 | 933 | size_t size, struct pstore_info *psi); |
755d4fe4 | 934 | static int erst_clearer(enum pstore_type_id type, u64 id, int count, |
a9efd39c | 935 | struct timespec time, struct pstore_info *psi); |
0bb77c46 TL |
936 | |
937 | static struct pstore_info erst_info = { | |
938 | .owner = THIS_MODULE, | |
939 | .name = "erst", | |
df36ac1b | 940 | .flags = PSTORE_FLAGS_FRAGILE, |
06cf91b4 CG |
941 | .open = erst_open_pstore, |
942 | .close = erst_close_pstore, | |
0bb77c46 TL |
943 | .read = erst_reader, |
944 | .write = erst_writer, | |
638c1fd3 | 945 | .erase = erst_clearer |
0bb77c46 TL |
946 | }; |
947 | ||
948 | #define CPER_CREATOR_PSTORE \ | |
949 | UUID_LE(0x75a574e3, 0x5052, 0x4b29, 0x8a, 0x8e, 0xbe, 0x2c, \ | |
950 | 0x64, 0x90, 0xb8, 0x9d) | |
951 | #define CPER_SECTION_TYPE_DMESG \ | |
952 | UUID_LE(0xc197e04e, 0xd545, 0x4a70, 0x9c, 0x17, 0xa5, 0x54, \ | |
953 | 0x94, 0x19, 0xeb, 0x12) | |
901037ba AB |
954 | #define CPER_SECTION_TYPE_DMESG_Z \ |
955 | UUID_LE(0x4f118707, 0x04dd, 0x4055, 0xb5, 0xdd, 0x95, 0x6d, \ | |
956 | 0x34, 0xdd, 0xfa, 0xc6) | |
0bb77c46 TL |
957 | #define CPER_SECTION_TYPE_MCE \ |
958 | UUID_LE(0xfe08ffbe, 0x95e4, 0x4be7, 0xbc, 0x73, 0x40, 0x96, \ | |
959 | 0x04, 0x4a, 0x38, 0xfc) | |
960 | ||
961 | struct cper_pstore_record { | |
962 | struct cper_record_header hdr; | |
963 | struct cper_section_descriptor sec_hdr; | |
964 | char data[]; | |
965 | } __packed; | |
966 | ||
06cf91b4 CG |
967 | static int reader_pos; |
968 | ||
969 | static int erst_open_pstore(struct pstore_info *psi) | |
970 | { | |
971 | int rc; | |
972 | ||
973 | if (erst_disable) | |
974 | return -ENODEV; | |
975 | ||
976 | rc = erst_get_record_id_begin(&reader_pos); | |
977 | ||
978 | return rc; | |
979 | } | |
980 | ||
981 | static int erst_close_pstore(struct pstore_info *psi) | |
982 | { | |
983 | erst_get_record_id_end(); | |
984 | ||
985 | return 0; | |
986 | } | |
987 | ||
755d4fe4 | 988 | static ssize_t erst_reader(u64 *id, enum pstore_type_id *type, int *count, |
f6f82851 | 989 | struct timespec *time, char **buf, |
9a4e1398 | 990 | bool *compressed, struct pstore_info *psi) |
0bb77c46 TL |
991 | { |
992 | int rc; | |
06cf91b4 | 993 | ssize_t len = 0; |
0bb77c46 | 994 | u64 record_id; |
f6f82851 KC |
995 | struct cper_pstore_record *rcd; |
996 | size_t rcd_len = sizeof(*rcd) + erst_info.bufsize; | |
0bb77c46 TL |
997 | |
998 | if (erst_disable) | |
999 | return -ENODEV; | |
1000 | ||
f6f82851 KC |
1001 | rcd = kmalloc(rcd_len, GFP_KERNEL); |
1002 | if (!rcd) { | |
1003 | rc = -ENOMEM; | |
1004 | goto out; | |
1005 | } | |
0bb77c46 | 1006 | skip: |
06cf91b4 CG |
1007 | rc = erst_get_record_id_next(&reader_pos, &record_id); |
1008 | if (rc) | |
1009 | goto out; | |
1010 | ||
0bb77c46 TL |
1011 | /* no more record */ |
1012 | if (record_id == APEI_ERST_INVALID_RECORD_ID) { | |
f6f82851 | 1013 | rc = -EINVAL; |
06cf91b4 | 1014 | goto out; |
0bb77c46 TL |
1015 | } |
1016 | ||
f6f82851 | 1017 | len = erst_read(record_id, &rcd->hdr, rcd_len); |
f5ec25de CG |
1018 | /* The record may be cleared by others, try read next record */ |
1019 | if (len == -ENOENT) | |
1020 | goto skip; | |
f6f82851 KC |
1021 | else if (len < sizeof(*rcd)) { |
1022 | rc = -EIO; | |
f5ec25de CG |
1023 | goto out; |
1024 | } | |
0bb77c46 TL |
1025 | if (uuid_le_cmp(rcd->hdr.creator_id, CPER_CREATOR_PSTORE) != 0) |
1026 | goto skip; | |
0bb77c46 | 1027 | |
f6f82851 KC |
1028 | *buf = kmalloc(len, GFP_KERNEL); |
1029 | if (*buf == NULL) { | |
1030 | rc = -ENOMEM; | |
1031 | goto out; | |
1032 | } | |
1033 | memcpy(*buf, rcd->data, len - sizeof(*rcd)); | |
0bb77c46 | 1034 | *id = record_id; |
901037ba | 1035 | *compressed = false; |
0bb77c46 | 1036 | if (uuid_le_cmp(rcd->sec_hdr.section_type, |
901037ba AB |
1037 | CPER_SECTION_TYPE_DMESG_Z) == 0) { |
1038 | *type = PSTORE_TYPE_DMESG; | |
1039 | *compressed = true; | |
1040 | } else if (uuid_le_cmp(rcd->sec_hdr.section_type, | |
0bb77c46 TL |
1041 | CPER_SECTION_TYPE_DMESG) == 0) |
1042 | *type = PSTORE_TYPE_DMESG; | |
1043 | else if (uuid_le_cmp(rcd->sec_hdr.section_type, | |
1044 | CPER_SECTION_TYPE_MCE) == 0) | |
1045 | *type = PSTORE_TYPE_MCE; | |
1046 | else | |
1047 | *type = PSTORE_TYPE_UNKNOWN; | |
1048 | ||
1049 | if (rcd->hdr.validation_bits & CPER_VALID_TIMESTAMP) | |
1050 | time->tv_sec = rcd->hdr.timestamp; | |
1051 | else | |
1052 | time->tv_sec = 0; | |
1053 | time->tv_nsec = 0; | |
1054 | ||
06cf91b4 | 1055 | out: |
f6f82851 | 1056 | kfree(rcd); |
06cf91b4 | 1057 | return (rc < 0) ? rc : (len - sizeof(*rcd)); |
0bb77c46 TL |
1058 | } |
1059 | ||
3d6d8d20 | 1060 | static int erst_writer(enum pstore_type_id type, enum kmsg_dump_reason reason, |
b3b515bb | 1061 | u64 *id, unsigned int part, int count, bool compressed, |
b94fdd07 | 1062 | size_t size, struct pstore_info *psi) |
0bb77c46 TL |
1063 | { |
1064 | struct cper_pstore_record *rcd = (struct cper_pstore_record *) | |
1065 | (erst_info.buf - sizeof(*rcd)); | |
b238b8fa | 1066 | int ret; |
0bb77c46 TL |
1067 | |
1068 | memset(rcd, 0, sizeof(*rcd)); | |
1069 | memcpy(rcd->hdr.signature, CPER_SIG_RECORD, CPER_SIG_SIZE); | |
1070 | rcd->hdr.revision = CPER_RECORD_REV; | |
1071 | rcd->hdr.signature_end = CPER_SIG_END; | |
1072 | rcd->hdr.section_count = 1; | |
1073 | rcd->hdr.error_severity = CPER_SEV_FATAL; | |
1074 | /* timestamp valid. platform_id, partition_id are invalid */ | |
1075 | rcd->hdr.validation_bits = CPER_VALID_TIMESTAMP; | |
1076 | rcd->hdr.timestamp = get_seconds(); | |
1077 | rcd->hdr.record_length = sizeof(*rcd) + size; | |
1078 | rcd->hdr.creator_id = CPER_CREATOR_PSTORE; | |
1079 | rcd->hdr.notification_type = CPER_NOTIFY_MCE; | |
1080 | rcd->hdr.record_id = cper_next_record_id(); | |
1081 | rcd->hdr.flags = CPER_HW_ERROR_FLAGS_PREVERR; | |
1082 | ||
1083 | rcd->sec_hdr.section_offset = sizeof(*rcd); | |
1084 | rcd->sec_hdr.section_length = size; | |
1085 | rcd->sec_hdr.revision = CPER_SEC_REV; | |
1086 | /* fru_id and fru_text is invalid */ | |
1087 | rcd->sec_hdr.validation_bits = 0; | |
1088 | rcd->sec_hdr.flags = CPER_SEC_PRIMARY; | |
1089 | switch (type) { | |
1090 | case PSTORE_TYPE_DMESG: | |
901037ba AB |
1091 | if (compressed) |
1092 | rcd->sec_hdr.section_type = CPER_SECTION_TYPE_DMESG_Z; | |
1093 | else | |
1094 | rcd->sec_hdr.section_type = CPER_SECTION_TYPE_DMESG; | |
0bb77c46 TL |
1095 | break; |
1096 | case PSTORE_TYPE_MCE: | |
1097 | rcd->sec_hdr.section_type = CPER_SECTION_TYPE_MCE; | |
1098 | break; | |
1099 | default: | |
1100 | return -EINVAL; | |
1101 | } | |
1102 | rcd->sec_hdr.section_severity = CPER_SEV_FATAL; | |
1103 | ||
b238b8fa CG |
1104 | ret = erst_write(&rcd->hdr); |
1105 | *id = rcd->hdr.record_id; | |
0bb77c46 | 1106 | |
b238b8fa | 1107 | return ret; |
0bb77c46 TL |
1108 | } |
1109 | ||
755d4fe4 | 1110 | static int erst_clearer(enum pstore_type_id type, u64 id, int count, |
a9efd39c | 1111 | struct timespec time, struct pstore_info *psi) |
638c1fd3 MG |
1112 | { |
1113 | return erst_clear(id); | |
1114 | } | |
1115 | ||
a08f82d0 HY |
1116 | static int __init erst_init(void) |
1117 | { | |
1118 | int rc = 0; | |
1119 | acpi_status status; | |
1120 | struct apei_exec_context ctx; | |
1121 | struct apei_resources erst_resources; | |
1122 | struct resource *r; | |
0bb77c46 | 1123 | char *buf; |
a08f82d0 HY |
1124 | |
1125 | if (acpi_disabled) | |
1126 | goto err; | |
1127 | ||
1128 | if (erst_disable) { | |
cb82a2e4 | 1129 | pr_info( |
a08f82d0 HY |
1130 | "Error Record Serialization Table (ERST) support is disabled.\n"); |
1131 | goto err; | |
1132 | } | |
1133 | ||
1134 | status = acpi_get_table(ACPI_SIG_ERST, 0, | |
1135 | (struct acpi_table_header **)&erst_tab); | |
ad686154 | 1136 | if (status == AE_NOT_FOUND) |
a08f82d0 | 1137 | goto err; |
ad686154 | 1138 | else if (ACPI_FAILURE(status)) { |
a08f82d0 | 1139 | const char *msg = acpi_format_exception(status); |
cb82a2e4 | 1140 | pr_err("Failed to get table, %s\n", msg); |
a08f82d0 HY |
1141 | rc = -EINVAL; |
1142 | goto err; | |
1143 | } | |
1144 | ||
1145 | rc = erst_check_table(erst_tab); | |
1146 | if (rc) { | |
cb82a2e4 | 1147 | pr_err(FW_BUG "ERST table is invalid.\n"); |
a08f82d0 HY |
1148 | goto err; |
1149 | } | |
1150 | ||
1151 | apei_resources_init(&erst_resources); | |
1152 | erst_exec_ctx_init(&ctx); | |
1153 | rc = apei_exec_collect_resources(&ctx, &erst_resources); | |
1154 | if (rc) | |
1155 | goto err_fini; | |
1156 | rc = apei_resources_request(&erst_resources, "APEI ERST"); | |
1157 | if (rc) | |
1158 | goto err_fini; | |
1159 | rc = apei_exec_pre_map_gars(&ctx); | |
1160 | if (rc) | |
1161 | goto err_release; | |
1162 | rc = erst_get_erange(&erst_erange); | |
1163 | if (rc) { | |
1164 | if (rc == -ENODEV) | |
cb82a2e4 | 1165 | pr_info( |
a08f82d0 HY |
1166 | "The corresponding hardware device or firmware implementation " |
1167 | "is not available.\n"); | |
1168 | else | |
cb82a2e4 | 1169 | pr_err("Failed to get Error Log Address Range.\n"); |
a08f82d0 HY |
1170 | goto err_unmap_reg; |
1171 | } | |
1172 | ||
1173 | r = request_mem_region(erst_erange.base, erst_erange.size, "APEI ERST"); | |
1174 | if (!r) { | |
cb82a2e4 BP |
1175 | pr_err("Can not request [mem %#010llx-%#010llx] for ERST.\n", |
1176 | (unsigned long long)erst_erange.base, | |
1177 | (unsigned long long)erst_erange.base + erst_erange.size - 1); | |
a08f82d0 HY |
1178 | rc = -EIO; |
1179 | goto err_unmap_reg; | |
1180 | } | |
1181 | rc = -ENOMEM; | |
1182 | erst_erange.vaddr = ioremap_cache(erst_erange.base, | |
1183 | erst_erange.size); | |
1184 | if (!erst_erange.vaddr) | |
1185 | goto err_release_erange; | |
1186 | ||
cb82a2e4 | 1187 | pr_info( |
74fd6c6f LS |
1188 | "Error Record Serialization Table (ERST) support is initialized.\n"); |
1189 | ||
0bb77c46 | 1190 | buf = kmalloc(erst_erange.size, GFP_KERNEL); |
abd4d558 | 1191 | spin_lock_init(&erst_info.buf_lock); |
0bb77c46 TL |
1192 | if (buf) { |
1193 | erst_info.buf = buf + sizeof(struct cper_pstore_record); | |
1194 | erst_info.bufsize = erst_erange.size - | |
1195 | sizeof(struct cper_pstore_record); | |
74fd6c6f LS |
1196 | rc = pstore_register(&erst_info); |
1197 | if (rc) { | |
1198 | if (rc != -EPERM) | |
cb82a2e4 BP |
1199 | pr_info( |
1200 | "Could not register with persistent store.\n"); | |
74fd6c6f LS |
1201 | erst_info.buf = NULL; |
1202 | erst_info.bufsize = 0; | |
0bb77c46 TL |
1203 | kfree(buf); |
1204 | } | |
74fd6c6f | 1205 | } else |
cb82a2e4 BP |
1206 | pr_err( |
1207 | "Failed to allocate %lld bytes for persistent store error log.\n", | |
74fd6c6f | 1208 | erst_erange.size); |
a08f82d0 HY |
1209 | |
1210 | return 0; | |
1211 | ||
1212 | err_release_erange: | |
1213 | release_mem_region(erst_erange.base, erst_erange.size); | |
1214 | err_unmap_reg: | |
1215 | apei_exec_post_unmap_gars(&ctx); | |
1216 | err_release: | |
1217 | apei_resources_release(&erst_resources); | |
1218 | err_fini: | |
1219 | apei_resources_fini(&erst_resources); | |
1220 | err: | |
1221 | erst_disable = 1; | |
1222 | return rc; | |
1223 | } | |
1224 | ||
1225 | device_initcall(erst_init); |