Commit | Line | Data |
---|---|---|
e4021345 HY |
1 | /* |
2 | * APEI Error INJection support | |
3 | * | |
4 | * EINJ provides a hardware error injection mechanism, this is useful | |
5 | * for debugging and testing of other APEI and RAS features. | |
6 | * | |
7 | * For more information about EINJ, please refer to ACPI Specification | |
8 | * version 4.0, section 17.5. | |
9 | * | |
6e320ec1 | 10 | * Copyright 2009-2010 Intel Corp. |
e4021345 HY |
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. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
25 | */ | |
26 | ||
27 | #include <linux/kernel.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/io.h> | |
31 | #include <linux/debugfs.h> | |
32 | #include <linux/seq_file.h> | |
33 | #include <linux/nmi.h> | |
34 | #include <linux/delay.h> | |
35 | #include <acpi/acpi.h> | |
36 | ||
37 | #include "apei-internal.h" | |
38 | ||
39 | #define EINJ_PFX "EINJ: " | |
40 | ||
41 | #define SPIN_UNIT 100 /* 100ns */ | |
e8a8b252 | 42 | /* Firmware should respond within 1 milliseconds */ |
e4021345 HY |
43 | #define FIRMWARE_TIMEOUT (1 * NSEC_PER_MSEC) |
44 | ||
c130bd6f TL |
45 | /* |
46 | * ACPI version 5 provides a SET_ERROR_TYPE_WITH_ADDRESS action. | |
47 | */ | |
48 | static int acpi5; | |
49 | ||
50 | struct set_error_type_with_address { | |
51 | u32 type; | |
52 | u32 vendor_extension; | |
53 | u32 flags; | |
54 | u32 apicid; | |
55 | u64 memory_address; | |
56 | u64 memory_address_range; | |
57 | u32 pcie_sbdf; | |
58 | }; | |
59 | enum { | |
60 | SETWA_FLAGS_APICID = 1, | |
61 | SETWA_FLAGS_MEM = 2, | |
62 | SETWA_FLAGS_PCIE_SBDF = 4, | |
63 | }; | |
64 | ||
65 | /* | |
66 | * Vendor extensions for platform specific operations | |
67 | */ | |
68 | struct vendor_error_type_extension { | |
69 | u32 length; | |
70 | u32 pcie_sbdf; | |
71 | u16 vendor_id; | |
72 | u16 device_id; | |
73 | u8 rev_id; | |
74 | u8 reserved[3]; | |
75 | }; | |
76 | ||
77 | static u32 vendor_flags; | |
78 | static struct debugfs_blob_wrapper vendor_blob; | |
79 | static char vendor_dev[64]; | |
80 | ||
6e320ec1 HY |
81 | /* |
82 | * Some BIOSes allow parameters to the SET_ERROR_TYPE entries in the | |
83 | * EINJ table through an unpublished extension. Use with caution as | |
84 | * most will ignore the parameter and make their own choice of address | |
c3e6088e HY |
85 | * for error injection. This extension is used only if |
86 | * param_extension module parameter is specified. | |
6e320ec1 HY |
87 | */ |
88 | struct einj_parameter { | |
89 | u64 type; | |
90 | u64 reserved1; | |
91 | u64 reserved2; | |
92 | u64 param1; | |
93 | u64 param2; | |
94 | }; | |
95 | ||
e4021345 HY |
96 | #define EINJ_OP_BUSY 0x1 |
97 | #define EINJ_STATUS_SUCCESS 0x0 | |
98 | #define EINJ_STATUS_FAIL 0x1 | |
99 | #define EINJ_STATUS_INVAL 0x2 | |
100 | ||
101 | #define EINJ_TAB_ENTRY(tab) \ | |
102 | ((struct acpi_whea_header *)((char *)(tab) + \ | |
103 | sizeof(struct acpi_table_einj))) | |
104 | ||
c3e6088e HY |
105 | static bool param_extension; |
106 | module_param(param_extension, bool, 0); | |
107 | ||
e4021345 HY |
108 | static struct acpi_table_einj *einj_tab; |
109 | ||
110 | static struct apei_resources einj_resources; | |
111 | ||
112 | static struct apei_exec_ins_type einj_ins_type[] = { | |
113 | [ACPI_EINJ_READ_REGISTER] = { | |
114 | .flags = APEI_EXEC_INS_ACCESS_REGISTER, | |
115 | .run = apei_exec_read_register, | |
116 | }, | |
117 | [ACPI_EINJ_READ_REGISTER_VALUE] = { | |
118 | .flags = APEI_EXEC_INS_ACCESS_REGISTER, | |
119 | .run = apei_exec_read_register_value, | |
120 | }, | |
121 | [ACPI_EINJ_WRITE_REGISTER] = { | |
122 | .flags = APEI_EXEC_INS_ACCESS_REGISTER, | |
123 | .run = apei_exec_write_register, | |
124 | }, | |
125 | [ACPI_EINJ_WRITE_REGISTER_VALUE] = { | |
126 | .flags = APEI_EXEC_INS_ACCESS_REGISTER, | |
127 | .run = apei_exec_write_register_value, | |
128 | }, | |
129 | [ACPI_EINJ_NOOP] = { | |
130 | .flags = 0, | |
131 | .run = apei_exec_noop, | |
132 | }, | |
133 | }; | |
134 | ||
135 | /* | |
136 | * Prevent EINJ interpreter to run simultaneously, because the | |
137 | * corresponding firmware implementation may not work properly when | |
138 | * invoked simultaneously. | |
139 | */ | |
140 | static DEFINE_MUTEX(einj_mutex); | |
141 | ||
c130bd6f TL |
142 | static void *einj_param; |
143 | ||
144 | #ifndef readq | |
145 | static inline __u64 readq(volatile void __iomem *addr) | |
146 | { | |
147 | return ((__u64)readl(addr+4) << 32) + readl(addr); | |
148 | } | |
149 | #endif | |
6e320ec1 | 150 | |
dbee8a0a RD |
151 | #ifndef writeq |
152 | static inline void writeq(__u64 val, volatile void __iomem *addr) | |
153 | { | |
154 | writel(val, addr); | |
155 | writel(val >> 32, addr+4); | |
156 | } | |
157 | #endif | |
158 | ||
e4021345 HY |
159 | static void einj_exec_ctx_init(struct apei_exec_context *ctx) |
160 | { | |
161 | apei_exec_ctx_init(ctx, einj_ins_type, ARRAY_SIZE(einj_ins_type), | |
162 | EINJ_TAB_ENTRY(einj_tab), einj_tab->entries); | |
163 | } | |
164 | ||
165 | static int __einj_get_available_error_type(u32 *type) | |
166 | { | |
167 | struct apei_exec_context ctx; | |
168 | int rc; | |
169 | ||
170 | einj_exec_ctx_init(&ctx); | |
171 | rc = apei_exec_run(&ctx, ACPI_EINJ_GET_ERROR_TYPE); | |
172 | if (rc) | |
173 | return rc; | |
174 | *type = apei_exec_ctx_get_output(&ctx); | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
179 | /* Get error injection capabilities of the platform */ | |
180 | static int einj_get_available_error_type(u32 *type) | |
181 | { | |
182 | int rc; | |
183 | ||
184 | mutex_lock(&einj_mutex); | |
185 | rc = __einj_get_available_error_type(type); | |
186 | mutex_unlock(&einj_mutex); | |
187 | ||
188 | return rc; | |
189 | } | |
190 | ||
191 | static int einj_timedout(u64 *t) | |
192 | { | |
193 | if ((s64)*t < SPIN_UNIT) { | |
194 | pr_warning(FW_WARN EINJ_PFX | |
195 | "Firmware does not respond in time\n"); | |
196 | return 1; | |
197 | } | |
198 | *t -= SPIN_UNIT; | |
199 | ndelay(SPIN_UNIT); | |
200 | touch_nmi_watchdog(); | |
201 | return 0; | |
202 | } | |
203 | ||
c130bd6f TL |
204 | static void check_vendor_extension(u64 paddr, |
205 | struct set_error_type_with_address *v5param) | |
206 | { | |
207 | int offset = readl(&v5param->vendor_extension); | |
208 | struct vendor_error_type_extension *v; | |
209 | u32 sbdf; | |
210 | ||
211 | if (!offset) | |
212 | return; | |
213 | v = ioremap(paddr + offset, sizeof(*v)); | |
214 | if (!v) | |
215 | return; | |
216 | sbdf = readl(&v->pcie_sbdf); | |
217 | sprintf(vendor_dev, "%x:%x:%x.%x vendor_id=%x device_id=%x rev_id=%x\n", | |
218 | sbdf >> 24, (sbdf >> 16) & 0xff, | |
219 | (sbdf >> 11) & 0x1f, (sbdf >> 8) & 0x7, | |
220 | readw(&v->vendor_id), readw(&v->device_id), | |
221 | readb(&v->rev_id)); | |
222 | iounmap(v); | |
223 | } | |
224 | ||
225 | static void *einj_get_parameter_address(void) | |
6e320ec1 HY |
226 | { |
227 | int i; | |
c130bd6f | 228 | u64 paddrv4 = 0, paddrv5 = 0; |
6e320ec1 HY |
229 | struct acpi_whea_header *entry; |
230 | ||
231 | entry = EINJ_TAB_ENTRY(einj_tab); | |
232 | for (i = 0; i < einj_tab->entries; i++) { | |
233 | if (entry->action == ACPI_EINJ_SET_ERROR_TYPE && | |
234 | entry->instruction == ACPI_EINJ_WRITE_REGISTER && | |
235 | entry->register_region.space_id == | |
236 | ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
c130bd6f TL |
237 | memcpy(&paddrv4, &entry->register_region.address, |
238 | sizeof(paddrv4)); | |
239 | if (entry->action == ACPI_EINJ_SET_ERROR_TYPE_WITH_ADDRESS && | |
240 | entry->instruction == ACPI_EINJ_WRITE_REGISTER && | |
241 | entry->register_region.space_id == | |
242 | ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
243 | memcpy(&paddrv5, &entry->register_region.address, | |
244 | sizeof(paddrv5)); | |
6e320ec1 HY |
245 | entry++; |
246 | } | |
c130bd6f TL |
247 | if (paddrv5) { |
248 | struct set_error_type_with_address *v5param; | |
249 | ||
250 | v5param = ioremap(paddrv5, sizeof(*v5param)); | |
251 | if (v5param) { | |
252 | acpi5 = 1; | |
253 | check_vendor_extension(paddrv5, v5param); | |
254 | return v5param; | |
255 | } | |
256 | } | |
257 | if (paddrv4) { | |
258 | struct einj_parameter *v4param; | |
259 | ||
260 | v4param = ioremap(paddrv4, sizeof(*v4param)); | |
261 | if (!v4param) | |
262 | return 0; | |
263 | if (readq(&v4param->reserved1) || readq(&v4param->reserved2)) { | |
264 | iounmap(v4param); | |
265 | return 0; | |
266 | } | |
267 | return v4param; | |
268 | } | |
6e320ec1 | 269 | |
c130bd6f | 270 | return 0; |
6e320ec1 HY |
271 | } |
272 | ||
e4021345 HY |
273 | /* do sanity check to trigger table */ |
274 | static int einj_check_trigger_header(struct acpi_einj_trigger *trigger_tab) | |
275 | { | |
276 | if (trigger_tab->header_size != sizeof(struct acpi_einj_trigger)) | |
277 | return -EINVAL; | |
278 | if (trigger_tab->table_size > PAGE_SIZE || | |
4c40aed8 | 279 | trigger_tab->table_size < trigger_tab->header_size) |
e4021345 HY |
280 | return -EINVAL; |
281 | if (trigger_tab->entry_count != | |
282 | (trigger_tab->table_size - trigger_tab->header_size) / | |
283 | sizeof(struct acpi_einj_entry)) | |
284 | return -EINVAL; | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
b4e008dc XH |
289 | static struct acpi_generic_address *einj_get_trigger_parameter_region( |
290 | struct acpi_einj_trigger *trigger_tab, u64 param1, u64 param2) | |
291 | { | |
292 | int i; | |
293 | struct acpi_whea_header *entry; | |
294 | ||
295 | entry = (struct acpi_whea_header *) | |
296 | ((char *)trigger_tab + sizeof(struct acpi_einj_trigger)); | |
297 | for (i = 0; i < trigger_tab->entry_count; i++) { | |
298 | if (entry->action == ACPI_EINJ_TRIGGER_ERROR && | |
299 | entry->instruction == ACPI_EINJ_WRITE_REGISTER_VALUE && | |
300 | entry->register_region.space_id == | |
301 | ACPI_ADR_SPACE_SYSTEM_MEMORY && | |
302 | (entry->register_region.address & param2) == (param1 & param2)) | |
303 | return &entry->register_region; | |
304 | entry++; | |
305 | } | |
306 | ||
307 | return NULL; | |
308 | } | |
e4021345 | 309 | /* Execute instructions in trigger error action table */ |
fdea163d HY |
310 | static int __einj_error_trigger(u64 trigger_paddr, u32 type, |
311 | u64 param1, u64 param2) | |
e4021345 HY |
312 | { |
313 | struct acpi_einj_trigger *trigger_tab = NULL; | |
314 | struct apei_exec_context trigger_ctx; | |
315 | struct apei_resources trigger_resources; | |
316 | struct acpi_whea_header *trigger_entry; | |
317 | struct resource *r; | |
318 | u32 table_size; | |
319 | int rc = -EIO; | |
b4e008dc | 320 | struct acpi_generic_address *trigger_param_region = NULL; |
e4021345 HY |
321 | |
322 | r = request_mem_region(trigger_paddr, sizeof(*trigger_tab), | |
323 | "APEI EINJ Trigger Table"); | |
324 | if (!r) { | |
325 | pr_err(EINJ_PFX | |
46b91e37 | 326 | "Can not request [mem %#010llx-%#010llx] for Trigger table\n", |
e4021345 | 327 | (unsigned long long)trigger_paddr, |
46b91e37 BH |
328 | (unsigned long long)trigger_paddr + |
329 | sizeof(*trigger_tab) - 1); | |
e4021345 HY |
330 | goto out; |
331 | } | |
332 | trigger_tab = ioremap_cache(trigger_paddr, sizeof(*trigger_tab)); | |
333 | if (!trigger_tab) { | |
334 | pr_err(EINJ_PFX "Failed to map trigger table!\n"); | |
335 | goto out_rel_header; | |
336 | } | |
337 | rc = einj_check_trigger_header(trigger_tab); | |
338 | if (rc) { | |
339 | pr_warning(FW_BUG EINJ_PFX | |
340 | "The trigger error action table is invalid\n"); | |
341 | goto out_rel_header; | |
342 | } | |
4c40aed8 NS |
343 | |
344 | /* No action structures in the TRIGGER_ERROR table, nothing to do */ | |
345 | if (!trigger_tab->entry_count) | |
346 | goto out_rel_header; | |
347 | ||
e4021345 HY |
348 | rc = -EIO; |
349 | table_size = trigger_tab->table_size; | |
350 | r = request_mem_region(trigger_paddr + sizeof(*trigger_tab), | |
351 | table_size - sizeof(*trigger_tab), | |
352 | "APEI EINJ Trigger Table"); | |
353 | if (!r) { | |
354 | pr_err(EINJ_PFX | |
46b91e37 BH |
355 | "Can not request [mem %#010llx-%#010llx] for Trigger Table Entry\n", |
356 | (unsigned long long)trigger_paddr + sizeof(*trigger_tab), | |
357 | (unsigned long long)trigger_paddr + table_size - 1); | |
e4021345 HY |
358 | goto out_rel_header; |
359 | } | |
360 | iounmap(trigger_tab); | |
361 | trigger_tab = ioremap_cache(trigger_paddr, table_size); | |
362 | if (!trigger_tab) { | |
363 | pr_err(EINJ_PFX "Failed to map trigger table!\n"); | |
364 | goto out_rel_entry; | |
365 | } | |
366 | trigger_entry = (struct acpi_whea_header *) | |
367 | ((char *)trigger_tab + sizeof(struct acpi_einj_trigger)); | |
368 | apei_resources_init(&trigger_resources); | |
369 | apei_exec_ctx_init(&trigger_ctx, einj_ins_type, | |
370 | ARRAY_SIZE(einj_ins_type), | |
371 | trigger_entry, trigger_tab->entry_count); | |
372 | rc = apei_exec_collect_resources(&trigger_ctx, &trigger_resources); | |
373 | if (rc) | |
374 | goto out_fini; | |
375 | rc = apei_resources_sub(&trigger_resources, &einj_resources); | |
376 | if (rc) | |
377 | goto out_fini; | |
fdea163d HY |
378 | /* |
379 | * Some firmware will access target address specified in | |
380 | * param1 to trigger the error when injecting memory error. | |
381 | * This will cause resource conflict with regular memory. So | |
382 | * remove it from trigger table resources. | |
383 | */ | |
384 | if (param_extension && (type & 0x0038) && param2) { | |
385 | struct apei_resources addr_resources; | |
386 | apei_resources_init(&addr_resources); | |
b4e008dc XH |
387 | trigger_param_region = einj_get_trigger_parameter_region( |
388 | trigger_tab, param1, param2); | |
389 | if (trigger_param_region) { | |
390 | rc = apei_resources_add(&addr_resources, | |
391 | trigger_param_region->address, | |
392 | trigger_param_region->bit_width/8, true); | |
393 | if (rc) | |
394 | goto out_fini; | |
395 | rc = apei_resources_sub(&trigger_resources, | |
396 | &addr_resources); | |
397 | } | |
fdea163d HY |
398 | apei_resources_fini(&addr_resources); |
399 | if (rc) | |
400 | goto out_fini; | |
401 | } | |
e4021345 HY |
402 | rc = apei_resources_request(&trigger_resources, "APEI EINJ Trigger"); |
403 | if (rc) | |
404 | goto out_fini; | |
405 | rc = apei_exec_pre_map_gars(&trigger_ctx); | |
406 | if (rc) | |
407 | goto out_release; | |
408 | ||
409 | rc = apei_exec_run(&trigger_ctx, ACPI_EINJ_TRIGGER_ERROR); | |
410 | ||
411 | apei_exec_post_unmap_gars(&trigger_ctx); | |
412 | out_release: | |
413 | apei_resources_release(&trigger_resources); | |
414 | out_fini: | |
415 | apei_resources_fini(&trigger_resources); | |
416 | out_rel_entry: | |
417 | release_mem_region(trigger_paddr + sizeof(*trigger_tab), | |
418 | table_size - sizeof(*trigger_tab)); | |
419 | out_rel_header: | |
420 | release_mem_region(trigger_paddr, sizeof(*trigger_tab)); | |
421 | out: | |
422 | if (trigger_tab) | |
423 | iounmap(trigger_tab); | |
424 | ||
425 | return rc; | |
426 | } | |
427 | ||
6e320ec1 | 428 | static int __einj_error_inject(u32 type, u64 param1, u64 param2) |
e4021345 HY |
429 | { |
430 | struct apei_exec_context ctx; | |
431 | u64 val, trigger_paddr, timeout = FIRMWARE_TIMEOUT; | |
432 | int rc; | |
433 | ||
434 | einj_exec_ctx_init(&ctx); | |
435 | ||
392913de | 436 | rc = apei_exec_run_optional(&ctx, ACPI_EINJ_BEGIN_OPERATION); |
e4021345 HY |
437 | if (rc) |
438 | return rc; | |
439 | apei_exec_ctx_set_input(&ctx, type); | |
c130bd6f TL |
440 | if (acpi5) { |
441 | struct set_error_type_with_address *v5param = einj_param; | |
442 | ||
443 | writel(type, &v5param->type); | |
444 | if (type & 0x80000000) { | |
445 | switch (vendor_flags) { | |
446 | case SETWA_FLAGS_APICID: | |
447 | writel(param1, &v5param->apicid); | |
448 | break; | |
449 | case SETWA_FLAGS_MEM: | |
450 | writeq(param1, &v5param->memory_address); | |
451 | writeq(param2, &v5param->memory_address_range); | |
452 | break; | |
453 | case SETWA_FLAGS_PCIE_SBDF: | |
454 | writel(param1, &v5param->pcie_sbdf); | |
455 | break; | |
456 | } | |
457 | writel(vendor_flags, &v5param->flags); | |
458 | } else { | |
459 | switch (type) { | |
460 | case ACPI_EINJ_PROCESSOR_CORRECTABLE: | |
461 | case ACPI_EINJ_PROCESSOR_UNCORRECTABLE: | |
462 | case ACPI_EINJ_PROCESSOR_FATAL: | |
463 | writel(param1, &v5param->apicid); | |
464 | writel(SETWA_FLAGS_APICID, &v5param->flags); | |
465 | break; | |
466 | case ACPI_EINJ_MEMORY_CORRECTABLE: | |
467 | case ACPI_EINJ_MEMORY_UNCORRECTABLE: | |
468 | case ACPI_EINJ_MEMORY_FATAL: | |
469 | writeq(param1, &v5param->memory_address); | |
470 | writeq(param2, &v5param->memory_address_range); | |
471 | writel(SETWA_FLAGS_MEM, &v5param->flags); | |
472 | break; | |
473 | case ACPI_EINJ_PCIX_CORRECTABLE: | |
474 | case ACPI_EINJ_PCIX_UNCORRECTABLE: | |
475 | case ACPI_EINJ_PCIX_FATAL: | |
476 | writel(param1, &v5param->pcie_sbdf); | |
477 | writel(SETWA_FLAGS_PCIE_SBDF, &v5param->flags); | |
478 | break; | |
479 | } | |
480 | } | |
481 | } else { | |
482 | rc = apei_exec_run(&ctx, ACPI_EINJ_SET_ERROR_TYPE); | |
483 | if (rc) | |
484 | return rc; | |
485 | if (einj_param) { | |
486 | struct einj_parameter *v4param = einj_param; | |
487 | writeq(param1, &v4param->param1); | |
488 | writeq(param2, &v4param->param2); | |
489 | } | |
6e320ec1 | 490 | } |
e4021345 HY |
491 | rc = apei_exec_run(&ctx, ACPI_EINJ_EXECUTE_OPERATION); |
492 | if (rc) | |
493 | return rc; | |
494 | for (;;) { | |
495 | rc = apei_exec_run(&ctx, ACPI_EINJ_CHECK_BUSY_STATUS); | |
496 | if (rc) | |
497 | return rc; | |
498 | val = apei_exec_ctx_get_output(&ctx); | |
499 | if (!(val & EINJ_OP_BUSY)) | |
500 | break; | |
501 | if (einj_timedout(&timeout)) | |
502 | return -EIO; | |
503 | } | |
504 | rc = apei_exec_run(&ctx, ACPI_EINJ_GET_COMMAND_STATUS); | |
505 | if (rc) | |
506 | return rc; | |
507 | val = apei_exec_ctx_get_output(&ctx); | |
508 | if (val != EINJ_STATUS_SUCCESS) | |
509 | return -EBUSY; | |
510 | ||
511 | rc = apei_exec_run(&ctx, ACPI_EINJ_GET_TRIGGER_TABLE); | |
512 | if (rc) | |
513 | return rc; | |
514 | trigger_paddr = apei_exec_ctx_get_output(&ctx); | |
fdea163d | 515 | rc = __einj_error_trigger(trigger_paddr, type, param1, param2); |
e4021345 HY |
516 | if (rc) |
517 | return rc; | |
392913de | 518 | rc = apei_exec_run_optional(&ctx, ACPI_EINJ_END_OPERATION); |
e4021345 HY |
519 | |
520 | return rc; | |
521 | } | |
522 | ||
523 | /* Inject the specified hardware error */ | |
6e320ec1 | 524 | static int einj_error_inject(u32 type, u64 param1, u64 param2) |
e4021345 HY |
525 | { |
526 | int rc; | |
527 | ||
528 | mutex_lock(&einj_mutex); | |
6e320ec1 | 529 | rc = __einj_error_inject(type, param1, param2); |
e4021345 HY |
530 | mutex_unlock(&einj_mutex); |
531 | ||
532 | return rc; | |
533 | } | |
534 | ||
535 | static u32 error_type; | |
6e320ec1 HY |
536 | static u64 error_param1; |
537 | static u64 error_param2; | |
e4021345 HY |
538 | static struct dentry *einj_debug_dir; |
539 | ||
540 | static int available_error_type_show(struct seq_file *m, void *v) | |
541 | { | |
542 | int rc; | |
543 | u32 available_error_type = 0; | |
544 | ||
545 | rc = einj_get_available_error_type(&available_error_type); | |
546 | if (rc) | |
547 | return rc; | |
548 | if (available_error_type & 0x0001) | |
549 | seq_printf(m, "0x00000001\tProcessor Correctable\n"); | |
550 | if (available_error_type & 0x0002) | |
551 | seq_printf(m, "0x00000002\tProcessor Uncorrectable non-fatal\n"); | |
552 | if (available_error_type & 0x0004) | |
553 | seq_printf(m, "0x00000004\tProcessor Uncorrectable fatal\n"); | |
554 | if (available_error_type & 0x0008) | |
555 | seq_printf(m, "0x00000008\tMemory Correctable\n"); | |
556 | if (available_error_type & 0x0010) | |
557 | seq_printf(m, "0x00000010\tMemory Uncorrectable non-fatal\n"); | |
558 | if (available_error_type & 0x0020) | |
559 | seq_printf(m, "0x00000020\tMemory Uncorrectable fatal\n"); | |
560 | if (available_error_type & 0x0040) | |
561 | seq_printf(m, "0x00000040\tPCI Express Correctable\n"); | |
562 | if (available_error_type & 0x0080) | |
563 | seq_printf(m, "0x00000080\tPCI Express Uncorrectable non-fatal\n"); | |
564 | if (available_error_type & 0x0100) | |
565 | seq_printf(m, "0x00000100\tPCI Express Uncorrectable fatal\n"); | |
566 | if (available_error_type & 0x0200) | |
567 | seq_printf(m, "0x00000200\tPlatform Correctable\n"); | |
568 | if (available_error_type & 0x0400) | |
569 | seq_printf(m, "0x00000400\tPlatform Uncorrectable non-fatal\n"); | |
570 | if (available_error_type & 0x0800) | |
571 | seq_printf(m, "0x00000800\tPlatform Uncorrectable fatal\n"); | |
572 | ||
573 | return 0; | |
574 | } | |
575 | ||
576 | static int available_error_type_open(struct inode *inode, struct file *file) | |
577 | { | |
578 | return single_open(file, available_error_type_show, NULL); | |
579 | } | |
580 | ||
581 | static const struct file_operations available_error_type_fops = { | |
582 | .open = available_error_type_open, | |
583 | .read = seq_read, | |
584 | .llseek = seq_lseek, | |
585 | .release = single_release, | |
586 | }; | |
587 | ||
588 | static int error_type_get(void *data, u64 *val) | |
589 | { | |
590 | *val = error_type; | |
591 | ||
592 | return 0; | |
593 | } | |
594 | ||
595 | static int error_type_set(void *data, u64 val) | |
596 | { | |
597 | int rc; | |
598 | u32 available_error_type = 0; | |
c130bd6f TL |
599 | u32 tval, vendor; |
600 | ||
601 | /* | |
602 | * Vendor defined types have 0x80000000 bit set, and | |
603 | * are not enumerated by ACPI_EINJ_GET_ERROR_TYPE | |
604 | */ | |
605 | vendor = val & 0x80000000; | |
606 | tval = val & 0x7fffffff; | |
e4021345 HY |
607 | |
608 | /* Only one error type can be specified */ | |
c130bd6f | 609 | if (tval & (tval - 1)) |
e4021345 | 610 | return -EINVAL; |
c130bd6f TL |
611 | if (!vendor) { |
612 | rc = einj_get_available_error_type(&available_error_type); | |
613 | if (rc) | |
614 | return rc; | |
615 | if (!(val & available_error_type)) | |
616 | return -EINVAL; | |
617 | } | |
e4021345 HY |
618 | error_type = val; |
619 | ||
620 | return 0; | |
621 | } | |
622 | ||
623 | DEFINE_SIMPLE_ATTRIBUTE(error_type_fops, error_type_get, | |
624 | error_type_set, "0x%llx\n"); | |
625 | ||
626 | static int error_inject_set(void *data, u64 val) | |
627 | { | |
628 | if (!error_type) | |
629 | return -EINVAL; | |
630 | ||
6e320ec1 | 631 | return einj_error_inject(error_type, error_param1, error_param2); |
e4021345 HY |
632 | } |
633 | ||
634 | DEFINE_SIMPLE_ATTRIBUTE(error_inject_fops, NULL, | |
635 | error_inject_set, "%llu\n"); | |
636 | ||
637 | static int einj_check_table(struct acpi_table_einj *einj_tab) | |
638 | { | |
3a78f965 HY |
639 | if ((einj_tab->header_length != |
640 | (sizeof(struct acpi_table_einj) - sizeof(einj_tab->header))) | |
641 | && (einj_tab->header_length != sizeof(struct acpi_table_einj))) | |
e4021345 HY |
642 | return -EINVAL; |
643 | if (einj_tab->header.length < sizeof(struct acpi_table_einj)) | |
644 | return -EINVAL; | |
645 | if (einj_tab->entries != | |
646 | (einj_tab->header.length - sizeof(struct acpi_table_einj)) / | |
647 | sizeof(struct acpi_einj_entry)) | |
648 | return -EINVAL; | |
649 | ||
650 | return 0; | |
651 | } | |
652 | ||
653 | static int __init einj_init(void) | |
654 | { | |
655 | int rc; | |
656 | acpi_status status; | |
657 | struct dentry *fentry; | |
658 | struct apei_exec_context ctx; | |
659 | ||
660 | if (acpi_disabled) | |
661 | return -ENODEV; | |
662 | ||
663 | status = acpi_get_table(ACPI_SIG_EINJ, 0, | |
664 | (struct acpi_table_header **)&einj_tab); | |
ad686154 | 665 | if (status == AE_NOT_FOUND) |
e4021345 | 666 | return -ENODEV; |
ad686154 | 667 | else if (ACPI_FAILURE(status)) { |
e4021345 HY |
668 | const char *msg = acpi_format_exception(status); |
669 | pr_err(EINJ_PFX "Failed to get table, %s\n", msg); | |
670 | return -EINVAL; | |
671 | } | |
672 | ||
673 | rc = einj_check_table(einj_tab); | |
674 | if (rc) { | |
675 | pr_warning(FW_BUG EINJ_PFX "EINJ table is invalid\n"); | |
676 | return -EINVAL; | |
677 | } | |
678 | ||
679 | rc = -ENOMEM; | |
680 | einj_debug_dir = debugfs_create_dir("einj", apei_get_debugfs_dir()); | |
681 | if (!einj_debug_dir) | |
682 | goto err_cleanup; | |
683 | fentry = debugfs_create_file("available_error_type", S_IRUSR, | |
684 | einj_debug_dir, NULL, | |
685 | &available_error_type_fops); | |
686 | if (!fentry) | |
687 | goto err_cleanup; | |
688 | fentry = debugfs_create_file("error_type", S_IRUSR | S_IWUSR, | |
689 | einj_debug_dir, NULL, &error_type_fops); | |
690 | if (!fentry) | |
691 | goto err_cleanup; | |
692 | fentry = debugfs_create_file("error_inject", S_IWUSR, | |
693 | einj_debug_dir, NULL, &error_inject_fops); | |
694 | if (!fentry) | |
695 | goto err_cleanup; | |
696 | ||
697 | apei_resources_init(&einj_resources); | |
698 | einj_exec_ctx_init(&ctx); | |
699 | rc = apei_exec_collect_resources(&ctx, &einj_resources); | |
700 | if (rc) | |
701 | goto err_fini; | |
702 | rc = apei_resources_request(&einj_resources, "APEI EINJ"); | |
703 | if (rc) | |
704 | goto err_fini; | |
705 | rc = apei_exec_pre_map_gars(&ctx); | |
706 | if (rc) | |
707 | goto err_release; | |
c130bd6f TL |
708 | |
709 | einj_param = einj_get_parameter_address(); | |
710 | if ((param_extension || acpi5) && einj_param) { | |
711 | fentry = debugfs_create_x64("param1", S_IRUSR | S_IWUSR, | |
712 | einj_debug_dir, &error_param1); | |
713 | if (!fentry) | |
714 | goto err_unmap; | |
715 | fentry = debugfs_create_x64("param2", S_IRUSR | S_IWUSR, | |
716 | einj_debug_dir, &error_param2); | |
717 | if (!fentry) | |
718 | goto err_unmap; | |
719 | } | |
720 | ||
721 | if (vendor_dev[0]) { | |
722 | vendor_blob.data = vendor_dev; | |
723 | vendor_blob.size = strlen(vendor_dev); | |
724 | fentry = debugfs_create_blob("vendor", S_IRUSR, | |
725 | einj_debug_dir, &vendor_blob); | |
726 | if (!fentry) | |
727 | goto err_unmap; | |
728 | fentry = debugfs_create_x32("vendor_flags", S_IRUSR | S_IWUSR, | |
729 | einj_debug_dir, &vendor_flags); | |
730 | if (!fentry) | |
731 | goto err_unmap; | |
6e320ec1 | 732 | } |
e4021345 HY |
733 | |
734 | pr_info(EINJ_PFX "Error INJection is initialized.\n"); | |
735 | ||
736 | return 0; | |
737 | ||
6e320ec1 | 738 | err_unmap: |
c3e6088e HY |
739 | if (einj_param) |
740 | iounmap(einj_param); | |
6e320ec1 | 741 | apei_exec_post_unmap_gars(&ctx); |
e4021345 HY |
742 | err_release: |
743 | apei_resources_release(&einj_resources); | |
744 | err_fini: | |
745 | apei_resources_fini(&einj_resources); | |
746 | err_cleanup: | |
747 | debugfs_remove_recursive(einj_debug_dir); | |
748 | ||
749 | return rc; | |
750 | } | |
751 | ||
752 | static void __exit einj_exit(void) | |
753 | { | |
754 | struct apei_exec_context ctx; | |
755 | ||
6e320ec1 HY |
756 | if (einj_param) |
757 | iounmap(einj_param); | |
e4021345 HY |
758 | einj_exec_ctx_init(&ctx); |
759 | apei_exec_post_unmap_gars(&ctx); | |
760 | apei_resources_release(&einj_resources); | |
761 | apei_resources_fini(&einj_resources); | |
762 | debugfs_remove_recursive(einj_debug_dir); | |
763 | } | |
764 | ||
765 | module_init(einj_init); | |
766 | module_exit(einj_exit); | |
767 | ||
768 | MODULE_AUTHOR("Huang Ying"); | |
769 | MODULE_DESCRIPTION("APEI Error INJection support"); | |
770 | MODULE_LICENSE("GPL"); |