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15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/init.h>
18#include <linux/io.h>
19#include <linux/debugfs.h>
20#include <linux/seq_file.h>
21#include <linux/nmi.h>
22#include <linux/delay.h>
23#include <linux/mm.h>
24#include <asm/unaligned.h>
25
26#include "apei-internal.h"
27
28#undef pr_fmt
29#define pr_fmt(fmt) "EINJ: " fmt
30
31#define SLEEP_UNIT_MIN 1000
32#define SLEEP_UNIT_MAX 5000
33
34#define FIRMWARE_TIMEOUT (1 * USEC_PER_SEC)
35#define ACPI5_VENDOR_BIT BIT(31)
36#define MEM_ERROR_MASK (ACPI_EINJ_MEMORY_CORRECTABLE | \
37 ACPI_EINJ_MEMORY_UNCORRECTABLE | \
38 ACPI_EINJ_MEMORY_FATAL)
39
40
41
42
43static int acpi5;
44
45struct set_error_type_with_address {
46 u32 type;
47 u32 vendor_extension;
48 u32 flags;
49 u32 apicid;
50 u64 memory_address;
51 u64 memory_address_range;
52 u32 pcie_sbdf;
53};
54enum {
55 SETWA_FLAGS_APICID = 1,
56 SETWA_FLAGS_MEM = 2,
57 SETWA_FLAGS_PCIE_SBDF = 4,
58};
59
60
61
62
63struct vendor_error_type_extension {
64 u32 length;
65 u32 pcie_sbdf;
66 u16 vendor_id;
67 u16 device_id;
68 u8 rev_id;
69 u8 reserved[3];
70};
71
72static u32 notrigger;
73
74static u32 vendor_flags;
75static struct debugfs_blob_wrapper vendor_blob;
76static char vendor_dev[64];
77
78
79
80
81
82
83
84
85struct einj_parameter {
86 u64 type;
87 u64 reserved1;
88 u64 reserved2;
89 u64 param1;
90 u64 param2;
91};
92
93#define EINJ_OP_BUSY 0x1
94#define EINJ_STATUS_SUCCESS 0x0
95#define EINJ_STATUS_FAIL 0x1
96#define EINJ_STATUS_INVAL 0x2
97
98#define EINJ_TAB_ENTRY(tab) \
99 ((struct acpi_whea_header *)((char *)(tab) + \
100 sizeof(struct acpi_table_einj)))
101
102static bool param_extension;
103module_param(param_extension, bool, 0);
104
105static struct acpi_table_einj *einj_tab;
106
107static struct apei_resources einj_resources;
108
109static struct apei_exec_ins_type einj_ins_type[] = {
110 [ACPI_EINJ_READ_REGISTER] = {
111 .flags = APEI_EXEC_INS_ACCESS_REGISTER,
112 .run = apei_exec_read_register,
113 },
114 [ACPI_EINJ_READ_REGISTER_VALUE] = {
115 .flags = APEI_EXEC_INS_ACCESS_REGISTER,
116 .run = apei_exec_read_register_value,
117 },
118 [ACPI_EINJ_WRITE_REGISTER] = {
119 .flags = APEI_EXEC_INS_ACCESS_REGISTER,
120 .run = apei_exec_write_register,
121 },
122 [ACPI_EINJ_WRITE_REGISTER_VALUE] = {
123 .flags = APEI_EXEC_INS_ACCESS_REGISTER,
124 .run = apei_exec_write_register_value,
125 },
126 [ACPI_EINJ_NOOP] = {
127 .flags = 0,
128 .run = apei_exec_noop,
129 },
130};
131
132
133
134
135
136
137static DEFINE_MUTEX(einj_mutex);
138
139static void *einj_param;
140
141static void einj_exec_ctx_init(struct apei_exec_context *ctx)
142{
143 apei_exec_ctx_init(ctx, einj_ins_type, ARRAY_SIZE(einj_ins_type),
144 EINJ_TAB_ENTRY(einj_tab), einj_tab->entries);
145}
146
147static int __einj_get_available_error_type(u32 *type)
148{
149 struct apei_exec_context ctx;
150 int rc;
151
152 einj_exec_ctx_init(&ctx);
153 rc = apei_exec_run(&ctx, ACPI_EINJ_GET_ERROR_TYPE);
154 if (rc)
155 return rc;
156 *type = apei_exec_ctx_get_output(&ctx);
157
158 return 0;
159}
160
161
162static int einj_get_available_error_type(u32 *type)
163{
164 int rc;
165
166 mutex_lock(&einj_mutex);
167 rc = __einj_get_available_error_type(type);
168 mutex_unlock(&einj_mutex);
169
170 return rc;
171}
172
173static int einj_timedout(u64 *t)
174{
175 if ((s64)*t < SLEEP_UNIT_MIN) {
176 pr_warn(FW_WARN "Firmware does not respond in time\n");
177 return 1;
178 }
179 *t -= SLEEP_UNIT_MIN;
180 usleep_range(SLEEP_UNIT_MIN, SLEEP_UNIT_MAX);
181
182 return 0;
183}
184
185static void check_vendor_extension(u64 paddr,
186 struct set_error_type_with_address *v5param)
187{
188 int offset = v5param->vendor_extension;
189 struct vendor_error_type_extension *v;
190 u32 sbdf;
191
192 if (!offset)
193 return;
194 v = acpi_os_map_iomem(paddr + offset, sizeof(*v));
195 if (!v)
196 return;
197 sbdf = v->pcie_sbdf;
198 sprintf(vendor_dev, "%x:%x:%x.%x vendor_id=%x device_id=%x rev_id=%x\n",
199 sbdf >> 24, (sbdf >> 16) & 0xff,
200 (sbdf >> 11) & 0x1f, (sbdf >> 8) & 0x7,
201 v->vendor_id, v->device_id, v->rev_id);
202 acpi_os_unmap_iomem(v, sizeof(*v));
203}
204
205static void *einj_get_parameter_address(void)
206{
207 int i;
208 u64 pa_v4 = 0, pa_v5 = 0;
209 struct acpi_whea_header *entry;
210
211 entry = EINJ_TAB_ENTRY(einj_tab);
212 for (i = 0; i < einj_tab->entries; i++) {
213 if (entry->action == ACPI_EINJ_SET_ERROR_TYPE &&
214 entry->instruction == ACPI_EINJ_WRITE_REGISTER &&
215 entry->register_region.space_id ==
216 ACPI_ADR_SPACE_SYSTEM_MEMORY)
217 pa_v4 = get_unaligned(&entry->register_region.address);
218 if (entry->action == ACPI_EINJ_SET_ERROR_TYPE_WITH_ADDRESS &&
219 entry->instruction == ACPI_EINJ_WRITE_REGISTER &&
220 entry->register_region.space_id ==
221 ACPI_ADR_SPACE_SYSTEM_MEMORY)
222 pa_v5 = get_unaligned(&entry->register_region.address);
223 entry++;
224 }
225 if (pa_v5) {
226 struct set_error_type_with_address *v5param;
227
228 v5param = acpi_os_map_iomem(pa_v5, sizeof(*v5param));
229 if (v5param) {
230 acpi5 = 1;
231 check_vendor_extension(pa_v5, v5param);
232 return v5param;
233 }
234 }
235 if (param_extension && pa_v4) {
236 struct einj_parameter *v4param;
237
238 v4param = acpi_os_map_iomem(pa_v4, sizeof(*v4param));
239 if (!v4param)
240 return NULL;
241 if (v4param->reserved1 || v4param->reserved2) {
242 acpi_os_unmap_iomem(v4param, sizeof(*v4param));
243 return NULL;
244 }
245 return v4param;
246 }
247
248 return NULL;
249}
250
251
252static int einj_check_trigger_header(struct acpi_einj_trigger *trigger_tab)
253{
254 if (trigger_tab->header_size != sizeof(struct acpi_einj_trigger))
255 return -EINVAL;
256 if (trigger_tab->table_size > PAGE_SIZE ||
257 trigger_tab->table_size < trigger_tab->header_size)
258 return -EINVAL;
259 if (trigger_tab->entry_count !=
260 (trigger_tab->table_size - trigger_tab->header_size) /
261 sizeof(struct acpi_einj_entry))
262 return -EINVAL;
263
264 return 0;
265}
266
267static struct acpi_generic_address *einj_get_trigger_parameter_region(
268 struct acpi_einj_trigger *trigger_tab, u64 param1, u64 param2)
269{
270 int i;
271 struct acpi_whea_header *entry;
272
273 entry = (struct acpi_whea_header *)
274 ((char *)trigger_tab + sizeof(struct acpi_einj_trigger));
275 for (i = 0; i < trigger_tab->entry_count; i++) {
276 if (entry->action == ACPI_EINJ_TRIGGER_ERROR &&
277 entry->instruction <= ACPI_EINJ_WRITE_REGISTER_VALUE &&
278 entry->register_region.space_id ==
279 ACPI_ADR_SPACE_SYSTEM_MEMORY &&
280 (entry->register_region.address & param2) == (param1 & param2))
281 return &entry->register_region;
282 entry++;
283 }
284
285 return NULL;
286}
287
288static int __einj_error_trigger(u64 trigger_paddr, u32 type,
289 u64 param1, u64 param2)
290{
291 struct acpi_einj_trigger *trigger_tab = NULL;
292 struct apei_exec_context trigger_ctx;
293 struct apei_resources trigger_resources;
294 struct acpi_whea_header *trigger_entry;
295 struct resource *r;
296 u32 table_size;
297 int rc = -EIO;
298 struct acpi_generic_address *trigger_param_region = NULL;
299
300 r = request_mem_region(trigger_paddr, sizeof(*trigger_tab),
301 "APEI EINJ Trigger Table");
302 if (!r) {
303 pr_err("Can not request [mem %#010llx-%#010llx] for Trigger table\n",
304 (unsigned long long)trigger_paddr,
305 (unsigned long long)trigger_paddr +
306 sizeof(*trigger_tab) - 1);
307 goto out;
308 }
309 trigger_tab = ioremap_cache(trigger_paddr, sizeof(*trigger_tab));
310 if (!trigger_tab) {
311 pr_err("Failed to map trigger table!\n");
312 goto out_rel_header;
313 }
314 rc = einj_check_trigger_header(trigger_tab);
315 if (rc) {
316 pr_warn(FW_BUG "Invalid trigger error action table.\n");
317 goto out_rel_header;
318 }
319
320
321 if (!trigger_tab->entry_count)
322 goto out_rel_header;
323
324 rc = -EIO;
325 table_size = trigger_tab->table_size;
326 r = request_mem_region(trigger_paddr + sizeof(*trigger_tab),
327 table_size - sizeof(*trigger_tab),
328 "APEI EINJ Trigger Table");
329 if (!r) {
330 pr_err("Can not request [mem %#010llx-%#010llx] for Trigger Table Entry\n",
331 (unsigned long long)trigger_paddr + sizeof(*trigger_tab),
332 (unsigned long long)trigger_paddr + table_size - 1);
333 goto out_rel_header;
334 }
335 iounmap(trigger_tab);
336 trigger_tab = ioremap_cache(trigger_paddr, table_size);
337 if (!trigger_tab) {
338 pr_err("Failed to map trigger table!\n");
339 goto out_rel_entry;
340 }
341 trigger_entry = (struct acpi_whea_header *)
342 ((char *)trigger_tab + sizeof(struct acpi_einj_trigger));
343 apei_resources_init(&trigger_resources);
344 apei_exec_ctx_init(&trigger_ctx, einj_ins_type,
345 ARRAY_SIZE(einj_ins_type),
346 trigger_entry, trigger_tab->entry_count);
347 rc = apei_exec_collect_resources(&trigger_ctx, &trigger_resources);
348 if (rc)
349 goto out_fini;
350 rc = apei_resources_sub(&trigger_resources, &einj_resources);
351 if (rc)
352 goto out_fini;
353
354
355
356
357
358
359 if ((param_extension || acpi5) && (type & MEM_ERROR_MASK) && param2) {
360 struct apei_resources addr_resources;
361 apei_resources_init(&addr_resources);
362 trigger_param_region = einj_get_trigger_parameter_region(
363 trigger_tab, param1, param2);
364 if (trigger_param_region) {
365 rc = apei_resources_add(&addr_resources,
366 trigger_param_region->address,
367 trigger_param_region->bit_width/8, true);
368 if (rc)
369 goto out_fini;
370 rc = apei_resources_sub(&trigger_resources,
371 &addr_resources);
372 }
373 apei_resources_fini(&addr_resources);
374 if (rc)
375 goto out_fini;
376 }
377 rc = apei_resources_request(&trigger_resources, "APEI EINJ Trigger");
378 if (rc)
379 goto out_fini;
380 rc = apei_exec_pre_map_gars(&trigger_ctx);
381 if (rc)
382 goto out_release;
383
384 rc = apei_exec_run(&trigger_ctx, ACPI_EINJ_TRIGGER_ERROR);
385
386 apei_exec_post_unmap_gars(&trigger_ctx);
387out_release:
388 apei_resources_release(&trigger_resources);
389out_fini:
390 apei_resources_fini(&trigger_resources);
391out_rel_entry:
392 release_mem_region(trigger_paddr + sizeof(*trigger_tab),
393 table_size - sizeof(*trigger_tab));
394out_rel_header:
395 release_mem_region(trigger_paddr, sizeof(*trigger_tab));
396out:
397 if (trigger_tab)
398 iounmap(trigger_tab);
399
400 return rc;
401}
402
403static int __einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2,
404 u64 param3, u64 param4)
405{
406 struct apei_exec_context ctx;
407 u64 val, trigger_paddr, timeout = FIRMWARE_TIMEOUT;
408 int rc;
409
410 einj_exec_ctx_init(&ctx);
411
412 rc = apei_exec_run_optional(&ctx, ACPI_EINJ_BEGIN_OPERATION);
413 if (rc)
414 return rc;
415 apei_exec_ctx_set_input(&ctx, type);
416 if (acpi5) {
417 struct set_error_type_with_address *v5param = einj_param;
418
419 v5param->type = type;
420 if (type & ACPI5_VENDOR_BIT) {
421 switch (vendor_flags) {
422 case SETWA_FLAGS_APICID:
423 v5param->apicid = param1;
424 break;
425 case SETWA_FLAGS_MEM:
426 v5param->memory_address = param1;
427 v5param->memory_address_range = param2;
428 break;
429 case SETWA_FLAGS_PCIE_SBDF:
430 v5param->pcie_sbdf = param1;
431 break;
432 }
433 v5param->flags = vendor_flags;
434 } else if (flags) {
435 v5param->flags = flags;
436 v5param->memory_address = param1;
437 v5param->memory_address_range = param2;
438 v5param->apicid = param3;
439 v5param->pcie_sbdf = param4;
440 } else {
441 switch (type) {
442 case ACPI_EINJ_PROCESSOR_CORRECTABLE:
443 case ACPI_EINJ_PROCESSOR_UNCORRECTABLE:
444 case ACPI_EINJ_PROCESSOR_FATAL:
445 v5param->apicid = param1;
446 v5param->flags = SETWA_FLAGS_APICID;
447 break;
448 case ACPI_EINJ_MEMORY_CORRECTABLE:
449 case ACPI_EINJ_MEMORY_UNCORRECTABLE:
450 case ACPI_EINJ_MEMORY_FATAL:
451 v5param->memory_address = param1;
452 v5param->memory_address_range = param2;
453 v5param->flags = SETWA_FLAGS_MEM;
454 break;
455 case ACPI_EINJ_PCIX_CORRECTABLE:
456 case ACPI_EINJ_PCIX_UNCORRECTABLE:
457 case ACPI_EINJ_PCIX_FATAL:
458 v5param->pcie_sbdf = param1;
459 v5param->flags = SETWA_FLAGS_PCIE_SBDF;
460 break;
461 }
462 }
463 } else {
464 rc = apei_exec_run(&ctx, ACPI_EINJ_SET_ERROR_TYPE);
465 if (rc)
466 return rc;
467 if (einj_param) {
468 struct einj_parameter *v4param = einj_param;
469 v4param->param1 = param1;
470 v4param->param2 = param2;
471 }
472 }
473 rc = apei_exec_run(&ctx, ACPI_EINJ_EXECUTE_OPERATION);
474 if (rc)
475 return rc;
476 for (;;) {
477 rc = apei_exec_run(&ctx, ACPI_EINJ_CHECK_BUSY_STATUS);
478 if (rc)
479 return rc;
480 val = apei_exec_ctx_get_output(&ctx);
481 if (!(val & EINJ_OP_BUSY))
482 break;
483 if (einj_timedout(&timeout))
484 return -EIO;
485 }
486 rc = apei_exec_run(&ctx, ACPI_EINJ_GET_COMMAND_STATUS);
487 if (rc)
488 return rc;
489 val = apei_exec_ctx_get_output(&ctx);
490 if (val != EINJ_STATUS_SUCCESS)
491 return -EBUSY;
492
493 rc = apei_exec_run(&ctx, ACPI_EINJ_GET_TRIGGER_TABLE);
494 if (rc)
495 return rc;
496 trigger_paddr = apei_exec_ctx_get_output(&ctx);
497 if (notrigger == 0) {
498 rc = __einj_error_trigger(trigger_paddr, type, param1, param2);
499 if (rc)
500 return rc;
501 }
502 rc = apei_exec_run_optional(&ctx, ACPI_EINJ_END_OPERATION);
503
504 return rc;
505}
506
507
508static int einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2,
509 u64 param3, u64 param4)
510{
511 int rc;
512 u64 base_addr, size;
513
514
515 if (flags && (flags &
516 ~(SETWA_FLAGS_APICID|SETWA_FLAGS_MEM|SETWA_FLAGS_PCIE_SBDF)))
517 return -EINVAL;
518
519
520
521
522
523
524
525 if (!(param_extension || acpi5))
526 goto inject;
527
528
529 if (type & ACPI5_VENDOR_BIT) {
530 if (vendor_flags != SETWA_FLAGS_MEM)
531 goto inject;
532 } else if (!(type & MEM_ERROR_MASK) && !(flags & SETWA_FLAGS_MEM))
533 goto inject;
534
535
536
537
538
539
540
541 base_addr = param1 & param2;
542 size = ~param2 + 1;
543
544 if (((param2 & PAGE_MASK) != PAGE_MASK) ||
545 ((region_intersects(base_addr, size, IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE)
546 != REGION_INTERSECTS) &&
547 (region_intersects(base_addr, size, IORESOURCE_MEM, IORES_DESC_PERSISTENT_MEMORY)
548 != REGION_INTERSECTS) &&
549 !arch_is_platform_page(base_addr)))
550 return -EINVAL;
551
552inject:
553 mutex_lock(&einj_mutex);
554 rc = __einj_error_inject(type, flags, param1, param2, param3, param4);
555 mutex_unlock(&einj_mutex);
556
557 return rc;
558}
559
560static u32 error_type;
561static u32 error_flags;
562static u64 error_param1;
563static u64 error_param2;
564static u64 error_param3;
565static u64 error_param4;
566static struct dentry *einj_debug_dir;
567
568static int available_error_type_show(struct seq_file *m, void *v)
569{
570 int rc;
571 u32 available_error_type = 0;
572
573 rc = einj_get_available_error_type(&available_error_type);
574 if (rc)
575 return rc;
576 if (available_error_type & 0x0001)
577 seq_printf(m, "0x00000001\tProcessor Correctable\n");
578 if (available_error_type & 0x0002)
579 seq_printf(m, "0x00000002\tProcessor Uncorrectable non-fatal\n");
580 if (available_error_type & 0x0004)
581 seq_printf(m, "0x00000004\tProcessor Uncorrectable fatal\n");
582 if (available_error_type & 0x0008)
583 seq_printf(m, "0x00000008\tMemory Correctable\n");
584 if (available_error_type & 0x0010)
585 seq_printf(m, "0x00000010\tMemory Uncorrectable non-fatal\n");
586 if (available_error_type & 0x0020)
587 seq_printf(m, "0x00000020\tMemory Uncorrectable fatal\n");
588 if (available_error_type & 0x0040)
589 seq_printf(m, "0x00000040\tPCI Express Correctable\n");
590 if (available_error_type & 0x0080)
591 seq_printf(m, "0x00000080\tPCI Express Uncorrectable non-fatal\n");
592 if (available_error_type & 0x0100)
593 seq_printf(m, "0x00000100\tPCI Express Uncorrectable fatal\n");
594 if (available_error_type & 0x0200)
595 seq_printf(m, "0x00000200\tPlatform Correctable\n");
596 if (available_error_type & 0x0400)
597 seq_printf(m, "0x00000400\tPlatform Uncorrectable non-fatal\n");
598 if (available_error_type & 0x0800)
599 seq_printf(m, "0x00000800\tPlatform Uncorrectable fatal\n");
600
601 return 0;
602}
603
604DEFINE_SHOW_ATTRIBUTE(available_error_type);
605
606static int error_type_get(void *data, u64 *val)
607{
608 *val = error_type;
609
610 return 0;
611}
612
613static int error_type_set(void *data, u64 val)
614{
615 int rc;
616 u32 available_error_type = 0;
617 u32 tval, vendor;
618
619
620
621
622
623 vendor = val & ACPI5_VENDOR_BIT;
624 tval = val & 0x7fffffff;
625
626
627 if (tval & (tval - 1))
628 return -EINVAL;
629 if (!vendor) {
630 rc = einj_get_available_error_type(&available_error_type);
631 if (rc)
632 return rc;
633 if (!(val & available_error_type))
634 return -EINVAL;
635 }
636 error_type = val;
637
638 return 0;
639}
640
641DEFINE_DEBUGFS_ATTRIBUTE(error_type_fops, error_type_get, error_type_set,
642 "0x%llx\n");
643
644static int error_inject_set(void *data, u64 val)
645{
646 if (!error_type)
647 return -EINVAL;
648
649 return einj_error_inject(error_type, error_flags, error_param1, error_param2,
650 error_param3, error_param4);
651}
652
653DEFINE_DEBUGFS_ATTRIBUTE(error_inject_fops, NULL, error_inject_set, "%llu\n");
654
655static int einj_check_table(struct acpi_table_einj *einj_tab)
656{
657 if ((einj_tab->header_length !=
658 (sizeof(struct acpi_table_einj) - sizeof(einj_tab->header)))
659 && (einj_tab->header_length != sizeof(struct acpi_table_einj)))
660 return -EINVAL;
661 if (einj_tab->header.length < sizeof(struct acpi_table_einj))
662 return -EINVAL;
663 if (einj_tab->entries !=
664 (einj_tab->header.length - sizeof(struct acpi_table_einj)) /
665 sizeof(struct acpi_einj_entry))
666 return -EINVAL;
667
668 return 0;
669}
670
671static int __init einj_init(void)
672{
673 int rc;
674 acpi_status status;
675 struct apei_exec_context ctx;
676
677 if (acpi_disabled) {
678 pr_info("ACPI disabled.\n");
679 return -ENODEV;
680 }
681
682 status = acpi_get_table(ACPI_SIG_EINJ, 0,
683 (struct acpi_table_header **)&einj_tab);
684 if (status == AE_NOT_FOUND) {
685 pr_warn("EINJ table not found.\n");
686 return -ENODEV;
687 }
688 else if (ACPI_FAILURE(status)) {
689 pr_err("Failed to get EINJ table: %s\n",
690 acpi_format_exception(status));
691 return -EINVAL;
692 }
693
694 rc = einj_check_table(einj_tab);
695 if (rc) {
696 pr_warn(FW_BUG "Invalid EINJ table.\n");
697 goto err_put_table;
698 }
699
700 rc = -ENOMEM;
701 einj_debug_dir = debugfs_create_dir("einj", apei_get_debugfs_dir());
702
703 debugfs_create_file("available_error_type", S_IRUSR, einj_debug_dir,
704 NULL, &available_error_type_fops);
705 debugfs_create_file_unsafe("error_type", 0600, einj_debug_dir,
706 NULL, &error_type_fops);
707 debugfs_create_file_unsafe("error_inject", 0200, einj_debug_dir,
708 NULL, &error_inject_fops);
709
710 apei_resources_init(&einj_resources);
711 einj_exec_ctx_init(&ctx);
712 rc = apei_exec_collect_resources(&ctx, &einj_resources);
713 if (rc) {
714 pr_err("Error collecting EINJ resources.\n");
715 goto err_fini;
716 }
717
718 rc = apei_resources_request(&einj_resources, "APEI EINJ");
719 if (rc) {
720 pr_err("Error requesting memory/port resources.\n");
721 goto err_fini;
722 }
723
724 rc = apei_exec_pre_map_gars(&ctx);
725 if (rc) {
726 pr_err("Error pre-mapping GARs.\n");
727 goto err_release;
728 }
729
730 einj_param = einj_get_parameter_address();
731 if ((param_extension || acpi5) && einj_param) {
732 debugfs_create_x32("flags", S_IRUSR | S_IWUSR, einj_debug_dir,
733 &error_flags);
734 debugfs_create_x64("param1", S_IRUSR | S_IWUSR, einj_debug_dir,
735 &error_param1);
736 debugfs_create_x64("param2", S_IRUSR | S_IWUSR, einj_debug_dir,
737 &error_param2);
738 debugfs_create_x64("param3", S_IRUSR | S_IWUSR, einj_debug_dir,
739 &error_param3);
740 debugfs_create_x64("param4", S_IRUSR | S_IWUSR, einj_debug_dir,
741 &error_param4);
742 debugfs_create_x32("notrigger", S_IRUSR | S_IWUSR,
743 einj_debug_dir, ¬rigger);
744 }
745
746 if (vendor_dev[0]) {
747 vendor_blob.data = vendor_dev;
748 vendor_blob.size = strlen(vendor_dev);
749 debugfs_create_blob("vendor", S_IRUSR, einj_debug_dir,
750 &vendor_blob);
751 debugfs_create_x32("vendor_flags", S_IRUSR | S_IWUSR,
752 einj_debug_dir, &vendor_flags);
753 }
754
755 pr_info("Error INJection is initialized.\n");
756
757 return 0;
758
759err_release:
760 apei_resources_release(&einj_resources);
761err_fini:
762 apei_resources_fini(&einj_resources);
763 debugfs_remove_recursive(einj_debug_dir);
764err_put_table:
765 acpi_put_table((struct acpi_table_header *)einj_tab);
766
767 return rc;
768}
769
770static void __exit einj_exit(void)
771{
772 struct apei_exec_context ctx;
773
774 if (einj_param) {
775 acpi_size size = (acpi5) ?
776 sizeof(struct set_error_type_with_address) :
777 sizeof(struct einj_parameter);
778
779 acpi_os_unmap_iomem(einj_param, size);
780 }
781 einj_exec_ctx_init(&ctx);
782 apei_exec_post_unmap_gars(&ctx);
783 apei_resources_release(&einj_resources);
784 apei_resources_fini(&einj_resources);
785 debugfs_remove_recursive(einj_debug_dir);
786 acpi_put_table((struct acpi_table_header *)einj_tab);
787}
788
789module_init(einj_init);
790module_exit(einj_exit);
791
792MODULE_AUTHOR("Huang Ying");
793MODULE_DESCRIPTION("APEI Error INJection support");
794MODULE_LICENSE("GPL");
795
