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4ca087dd5f4fceb797e1272912b06f082af7549d
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / acpi / apei / einj.c
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 *
10 * Copyright 2009-2010 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.
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 */
42 /* Firmware should respond within 1 milliseconds */
43 #define FIRMWARE_TIMEOUT (1 * NSEC_PER_MSEC)
44
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
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
85 * for error injection. This extension is used only if
86 * param_extension module parameter is specified.
87 */
88 struct einj_parameter {
89 u64 type;
90 u64 reserved1;
91 u64 reserved2;
92 u64 param1;
93 u64 param2;
94 };
95
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
105 static bool param_extension;
106 module_param(param_extension, bool, 0);
107
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
142 static void *einj_param;
143
144 static void einj_exec_ctx_init(struct apei_exec_context *ctx)
145 {
146 apei_exec_ctx_init(ctx, einj_ins_type, ARRAY_SIZE(einj_ins_type),
147 EINJ_TAB_ENTRY(einj_tab), einj_tab->entries);
148 }
149
150 static int __einj_get_available_error_type(u32 *type)
151 {
152 struct apei_exec_context ctx;
153 int rc;
154
155 einj_exec_ctx_init(&ctx);
156 rc = apei_exec_run(&ctx, ACPI_EINJ_GET_ERROR_TYPE);
157 if (rc)
158 return rc;
159 *type = apei_exec_ctx_get_output(&ctx);
160
161 return 0;
162 }
163
164 /* Get error injection capabilities of the platform */
165 static int einj_get_available_error_type(u32 *type)
166 {
167 int rc;
168
169 mutex_lock(&einj_mutex);
170 rc = __einj_get_available_error_type(type);
171 mutex_unlock(&einj_mutex);
172
173 return rc;
174 }
175
176 static int einj_timedout(u64 *t)
177 {
178 if ((s64)*t < SPIN_UNIT) {
179 pr_warning(FW_WARN EINJ_PFX
180 "Firmware does not respond in time\n");
181 return 1;
182 }
183 *t -= SPIN_UNIT;
184 ndelay(SPIN_UNIT);
185 touch_nmi_watchdog();
186 return 0;
187 }
188
189 static void check_vendor_extension(u64 paddr,
190 struct set_error_type_with_address *v5param)
191 {
192 int offset = v5param->vendor_extension;
193 struct vendor_error_type_extension *v;
194 u32 sbdf;
195
196 if (!offset)
197 return;
198 v = acpi_os_map_memory(paddr + offset, sizeof(*v));
199 if (!v)
200 return;
201 sbdf = v->pcie_sbdf;
202 sprintf(vendor_dev, "%x:%x:%x.%x vendor_id=%x device_id=%x rev_id=%x\n",
203 sbdf >> 24, (sbdf >> 16) & 0xff,
204 (sbdf >> 11) & 0x1f, (sbdf >> 8) & 0x7,
205 v->vendor_id, v->device_id, v->rev_id);
206 acpi_os_unmap_memory(v, sizeof(*v));
207 }
208
209 static void *einj_get_parameter_address(void)
210 {
211 int i;
212 u64 paddrv4 = 0, paddrv5 = 0;
213 struct acpi_whea_header *entry;
214
215 entry = EINJ_TAB_ENTRY(einj_tab);
216 for (i = 0; i < einj_tab->entries; i++) {
217 if (entry->action == ACPI_EINJ_SET_ERROR_TYPE &&
218 entry->instruction == ACPI_EINJ_WRITE_REGISTER &&
219 entry->register_region.space_id ==
220 ACPI_ADR_SPACE_SYSTEM_MEMORY)
221 memcpy(&paddrv4, &entry->register_region.address,
222 sizeof(paddrv4));
223 if (entry->action == ACPI_EINJ_SET_ERROR_TYPE_WITH_ADDRESS &&
224 entry->instruction == ACPI_EINJ_WRITE_REGISTER &&
225 entry->register_region.space_id ==
226 ACPI_ADR_SPACE_SYSTEM_MEMORY)
227 memcpy(&paddrv5, &entry->register_region.address,
228 sizeof(paddrv5));
229 entry++;
230 }
231 if (paddrv5) {
232 struct set_error_type_with_address *v5param;
233
234 v5param = acpi_os_map_memory(paddrv5, sizeof(*v5param));
235 if (v5param) {
236 acpi5 = 1;
237 check_vendor_extension(paddrv5, v5param);
238 return v5param;
239 }
240 }
241 if (paddrv4) {
242 struct einj_parameter *v4param;
243
244 v4param = acpi_os_map_memory(paddrv4, sizeof(*v4param));
245 if (!v4param)
246 return NULL;
247 if (v4param->reserved1 || v4param->reserved2) {
248 acpi_os_unmap_memory(v4param, sizeof(*v4param));
249 return NULL;
250 }
251 return v4param;
252 }
253
254 return NULL;
255 }
256
257 /* do sanity check to trigger table */
258 static int einj_check_trigger_header(struct acpi_einj_trigger *trigger_tab)
259 {
260 if (trigger_tab->header_size != sizeof(struct acpi_einj_trigger))
261 return -EINVAL;
262 if (trigger_tab->table_size > PAGE_SIZE ||
263 trigger_tab->table_size < trigger_tab->header_size)
264 return -EINVAL;
265 if (trigger_tab->entry_count !=
266 (trigger_tab->table_size - trigger_tab->header_size) /
267 sizeof(struct acpi_einj_entry))
268 return -EINVAL;
269
270 return 0;
271 }
272
273 static struct acpi_generic_address *einj_get_trigger_parameter_region(
274 struct acpi_einj_trigger *trigger_tab, u64 param1, u64 param2)
275 {
276 int i;
277 struct acpi_whea_header *entry;
278
279 entry = (struct acpi_whea_header *)
280 ((char *)trigger_tab + sizeof(struct acpi_einj_trigger));
281 for (i = 0; i < trigger_tab->entry_count; i++) {
282 if (entry->action == ACPI_EINJ_TRIGGER_ERROR &&
283 entry->instruction == ACPI_EINJ_WRITE_REGISTER_VALUE &&
284 entry->register_region.space_id ==
285 ACPI_ADR_SPACE_SYSTEM_MEMORY &&
286 (entry->register_region.address & param2) == (param1 & param2))
287 return &entry->register_region;
288 entry++;
289 }
290
291 return NULL;
292 }
293 /* Execute instructions in trigger error action table */
294 static int __einj_error_trigger(u64 trigger_paddr, u32 type,
295 u64 param1, u64 param2)
296 {
297 struct acpi_einj_trigger *trigger_tab = NULL;
298 struct apei_exec_context trigger_ctx;
299 struct apei_resources trigger_resources;
300 struct acpi_whea_header *trigger_entry;
301 struct resource *r;
302 u32 table_size;
303 int rc = -EIO;
304 struct acpi_generic_address *trigger_param_region = NULL;
305
306 r = request_mem_region(trigger_paddr, sizeof(*trigger_tab),
307 "APEI EINJ Trigger Table");
308 if (!r) {
309 pr_err(EINJ_PFX
310 "Can not request [mem %#010llx-%#010llx] for Trigger table\n",
311 (unsigned long long)trigger_paddr,
312 (unsigned long long)trigger_paddr +
313 sizeof(*trigger_tab) - 1);
314 goto out;
315 }
316 trigger_tab = ioremap_cache(trigger_paddr, sizeof(*trigger_tab));
317 if (!trigger_tab) {
318 pr_err(EINJ_PFX "Failed to map trigger table!\n");
319 goto out_rel_header;
320 }
321 rc = einj_check_trigger_header(trigger_tab);
322 if (rc) {
323 pr_warning(FW_BUG EINJ_PFX
324 "The trigger error action table is invalid\n");
325 goto out_rel_header;
326 }
327
328 /* No action structures in the TRIGGER_ERROR table, nothing to do */
329 if (!trigger_tab->entry_count)
330 goto out_rel_header;
331
332 rc = -EIO;
333 table_size = trigger_tab->table_size;
334 r = request_mem_region(trigger_paddr + sizeof(*trigger_tab),
335 table_size - sizeof(*trigger_tab),
336 "APEI EINJ Trigger Table");
337 if (!r) {
338 pr_err(EINJ_PFX
339 "Can not request [mem %#010llx-%#010llx] for Trigger Table Entry\n",
340 (unsigned long long)trigger_paddr + sizeof(*trigger_tab),
341 (unsigned long long)trigger_paddr + table_size - 1);
342 goto out_rel_header;
343 }
344 iounmap(trigger_tab);
345 trigger_tab = ioremap_cache(trigger_paddr, table_size);
346 if (!trigger_tab) {
347 pr_err(EINJ_PFX "Failed to map trigger table!\n");
348 goto out_rel_entry;
349 }
350 trigger_entry = (struct acpi_whea_header *)
351 ((char *)trigger_tab + sizeof(struct acpi_einj_trigger));
352 apei_resources_init(&trigger_resources);
353 apei_exec_ctx_init(&trigger_ctx, einj_ins_type,
354 ARRAY_SIZE(einj_ins_type),
355 trigger_entry, trigger_tab->entry_count);
356 rc = apei_exec_collect_resources(&trigger_ctx, &trigger_resources);
357 if (rc)
358 goto out_fini;
359 rc = apei_resources_sub(&trigger_resources, &einj_resources);
360 if (rc)
361 goto out_fini;
362 /*
363 * Some firmware will access target address specified in
364 * param1 to trigger the error when injecting memory error.
365 * This will cause resource conflict with regular memory. So
366 * remove it from trigger table resources.
367 */
368 if (param_extension && (type & 0x0038) && param2) {
369 struct apei_resources addr_resources;
370 apei_resources_init(&addr_resources);
371 trigger_param_region = einj_get_trigger_parameter_region(
372 trigger_tab, param1, param2);
373 if (trigger_param_region) {
374 rc = apei_resources_add(&addr_resources,
375 trigger_param_region->address,
376 trigger_param_region->bit_width/8, true);
377 if (rc)
378 goto out_fini;
379 rc = apei_resources_sub(&trigger_resources,
380 &addr_resources);
381 }
382 apei_resources_fini(&addr_resources);
383 if (rc)
384 goto out_fini;
385 }
386 rc = apei_resources_request(&trigger_resources, "APEI EINJ Trigger");
387 if (rc)
388 goto out_fini;
389 rc = apei_exec_pre_map_gars(&trigger_ctx);
390 if (rc)
391 goto out_release;
392
393 rc = apei_exec_run(&trigger_ctx, ACPI_EINJ_TRIGGER_ERROR);
394
395 apei_exec_post_unmap_gars(&trigger_ctx);
396 out_release:
397 apei_resources_release(&trigger_resources);
398 out_fini:
399 apei_resources_fini(&trigger_resources);
400 out_rel_entry:
401 release_mem_region(trigger_paddr + sizeof(*trigger_tab),
402 table_size - sizeof(*trigger_tab));
403 out_rel_header:
404 release_mem_region(trigger_paddr, sizeof(*trigger_tab));
405 out:
406 if (trigger_tab)
407 iounmap(trigger_tab);
408
409 return rc;
410 }
411
412 static int __einj_error_inject(u32 type, u64 param1, u64 param2)
413 {
414 struct apei_exec_context ctx;
415 u64 val, trigger_paddr, timeout = FIRMWARE_TIMEOUT;
416 int rc;
417
418 einj_exec_ctx_init(&ctx);
419
420 rc = apei_exec_run_optional(&ctx, ACPI_EINJ_BEGIN_OPERATION);
421 if (rc)
422 return rc;
423 apei_exec_ctx_set_input(&ctx, type);
424 if (acpi5) {
425 struct set_error_type_with_address *v5param = einj_param;
426
427 v5param->type = type;
428 if (type & 0x80000000) {
429 switch (vendor_flags) {
430 case SETWA_FLAGS_APICID:
431 v5param->apicid = param1;
432 break;
433 case SETWA_FLAGS_MEM:
434 v5param->memory_address = param1;
435 v5param->memory_address_range = param2;
436 break;
437 case SETWA_FLAGS_PCIE_SBDF:
438 v5param->pcie_sbdf = param1;
439 break;
440 }
441 v5param->flags = vendor_flags;
442 } else {
443 switch (type) {
444 case ACPI_EINJ_PROCESSOR_CORRECTABLE:
445 case ACPI_EINJ_PROCESSOR_UNCORRECTABLE:
446 case ACPI_EINJ_PROCESSOR_FATAL:
447 v5param->apicid = param1;
448 v5param->flags = SETWA_FLAGS_APICID;
449 break;
450 case ACPI_EINJ_MEMORY_CORRECTABLE:
451 case ACPI_EINJ_MEMORY_UNCORRECTABLE:
452 case ACPI_EINJ_MEMORY_FATAL:
453 v5param->memory_address = param1;
454 v5param->memory_address_range = param2;
455 v5param->flags = SETWA_FLAGS_MEM;
456 break;
457 case ACPI_EINJ_PCIX_CORRECTABLE:
458 case ACPI_EINJ_PCIX_UNCORRECTABLE:
459 case ACPI_EINJ_PCIX_FATAL:
460 v5param->pcie_sbdf = param1;
461 v5param->flags = SETWA_FLAGS_PCIE_SBDF;
462 break;
463 }
464 }
465 } else {
466 rc = apei_exec_run(&ctx, ACPI_EINJ_SET_ERROR_TYPE);
467 if (rc)
468 return rc;
469 if (einj_param) {
470 struct einj_parameter *v4param = einj_param;
471 v4param->param1 = param1;
472 v4param->param2 = param2;
473 }
474 }
475 rc = apei_exec_run(&ctx, ACPI_EINJ_EXECUTE_OPERATION);
476 if (rc)
477 return rc;
478 for (;;) {
479 rc = apei_exec_run(&ctx, ACPI_EINJ_CHECK_BUSY_STATUS);
480 if (rc)
481 return rc;
482 val = apei_exec_ctx_get_output(&ctx);
483 if (!(val & EINJ_OP_BUSY))
484 break;
485 if (einj_timedout(&timeout))
486 return -EIO;
487 }
488 rc = apei_exec_run(&ctx, ACPI_EINJ_GET_COMMAND_STATUS);
489 if (rc)
490 return rc;
491 val = apei_exec_ctx_get_output(&ctx);
492 if (val != EINJ_STATUS_SUCCESS)
493 return -EBUSY;
494
495 rc = apei_exec_run(&ctx, ACPI_EINJ_GET_TRIGGER_TABLE);
496 if (rc)
497 return rc;
498 trigger_paddr = apei_exec_ctx_get_output(&ctx);
499 rc = __einj_error_trigger(trigger_paddr, type, param1, param2);
500 if (rc)
501 return rc;
502 rc = apei_exec_run_optional(&ctx, ACPI_EINJ_END_OPERATION);
503
504 return rc;
505 }
506
507 /* Inject the specified hardware error */
508 static int einj_error_inject(u32 type, u64 param1, u64 param2)
509 {
510 int rc;
511
512 mutex_lock(&einj_mutex);
513 rc = __einj_error_inject(type, param1, param2);
514 mutex_unlock(&einj_mutex);
515
516 return rc;
517 }
518
519 static u32 error_type;
520 static u64 error_param1;
521 static u64 error_param2;
522 static struct dentry *einj_debug_dir;
523
524 static int available_error_type_show(struct seq_file *m, void *v)
525 {
526 int rc;
527 u32 available_error_type = 0;
528
529 rc = einj_get_available_error_type(&available_error_type);
530 if (rc)
531 return rc;
532 if (available_error_type & 0x0001)
533 seq_printf(m, "0x00000001\tProcessor Correctable\n");
534 if (available_error_type & 0x0002)
535 seq_printf(m, "0x00000002\tProcessor Uncorrectable non-fatal\n");
536 if (available_error_type & 0x0004)
537 seq_printf(m, "0x00000004\tProcessor Uncorrectable fatal\n");
538 if (available_error_type & 0x0008)
539 seq_printf(m, "0x00000008\tMemory Correctable\n");
540 if (available_error_type & 0x0010)
541 seq_printf(m, "0x00000010\tMemory Uncorrectable non-fatal\n");
542 if (available_error_type & 0x0020)
543 seq_printf(m, "0x00000020\tMemory Uncorrectable fatal\n");
544 if (available_error_type & 0x0040)
545 seq_printf(m, "0x00000040\tPCI Express Correctable\n");
546 if (available_error_type & 0x0080)
547 seq_printf(m, "0x00000080\tPCI Express Uncorrectable non-fatal\n");
548 if (available_error_type & 0x0100)
549 seq_printf(m, "0x00000100\tPCI Express Uncorrectable fatal\n");
550 if (available_error_type & 0x0200)
551 seq_printf(m, "0x00000200\tPlatform Correctable\n");
552 if (available_error_type & 0x0400)
553 seq_printf(m, "0x00000400\tPlatform Uncorrectable non-fatal\n");
554 if (available_error_type & 0x0800)
555 seq_printf(m, "0x00000800\tPlatform Uncorrectable fatal\n");
556
557 return 0;
558 }
559
560 static int available_error_type_open(struct inode *inode, struct file *file)
561 {
562 return single_open(file, available_error_type_show, NULL);
563 }
564
565 static const struct file_operations available_error_type_fops = {
566 .open = available_error_type_open,
567 .read = seq_read,
568 .llseek = seq_lseek,
569 .release = single_release,
570 };
571
572 static int error_type_get(void *data, u64 *val)
573 {
574 *val = error_type;
575
576 return 0;
577 }
578
579 static int error_type_set(void *data, u64 val)
580 {
581 int rc;
582 u32 available_error_type = 0;
583 u32 tval, vendor;
584
585 /*
586 * Vendor defined types have 0x80000000 bit set, and
587 * are not enumerated by ACPI_EINJ_GET_ERROR_TYPE
588 */
589 vendor = val & 0x80000000;
590 tval = val & 0x7fffffff;
591
592 /* Only one error type can be specified */
593 if (tval & (tval - 1))
594 return -EINVAL;
595 if (!vendor) {
596 rc = einj_get_available_error_type(&available_error_type);
597 if (rc)
598 return rc;
599 if (!(val & available_error_type))
600 return -EINVAL;
601 }
602 error_type = val;
603
604 return 0;
605 }
606
607 DEFINE_SIMPLE_ATTRIBUTE(error_type_fops, error_type_get,
608 error_type_set, "0x%llx\n");
609
610 static int error_inject_set(void *data, u64 val)
611 {
612 if (!error_type)
613 return -EINVAL;
614
615 return einj_error_inject(error_type, error_param1, error_param2);
616 }
617
618 DEFINE_SIMPLE_ATTRIBUTE(error_inject_fops, NULL,
619 error_inject_set, "%llu\n");
620
621 static int einj_check_table(struct acpi_table_einj *einj_tab)
622 {
623 if ((einj_tab->header_length !=
624 (sizeof(struct acpi_table_einj) - sizeof(einj_tab->header)))
625 && (einj_tab->header_length != sizeof(struct acpi_table_einj)))
626 return -EINVAL;
627 if (einj_tab->header.length < sizeof(struct acpi_table_einj))
628 return -EINVAL;
629 if (einj_tab->entries !=
630 (einj_tab->header.length - sizeof(struct acpi_table_einj)) /
631 sizeof(struct acpi_einj_entry))
632 return -EINVAL;
633
634 return 0;
635 }
636
637 static int __init einj_init(void)
638 {
639 int rc;
640 acpi_status status;
641 struct dentry *fentry;
642 struct apei_exec_context ctx;
643
644 if (acpi_disabled)
645 return -ENODEV;
646
647 status = acpi_get_table(ACPI_SIG_EINJ, 0,
648 (struct acpi_table_header **)&einj_tab);
649 if (status == AE_NOT_FOUND)
650 return -ENODEV;
651 else if (ACPI_FAILURE(status)) {
652 const char *msg = acpi_format_exception(status);
653 pr_err(EINJ_PFX "Failed to get table, %s\n", msg);
654 return -EINVAL;
655 }
656
657 rc = einj_check_table(einj_tab);
658 if (rc) {
659 pr_warning(FW_BUG EINJ_PFX "EINJ table is invalid\n");
660 return -EINVAL;
661 }
662
663 rc = -ENOMEM;
664 einj_debug_dir = debugfs_create_dir("einj", apei_get_debugfs_dir());
665 if (!einj_debug_dir)
666 goto err_cleanup;
667 fentry = debugfs_create_file("available_error_type", S_IRUSR,
668 einj_debug_dir, NULL,
669 &available_error_type_fops);
670 if (!fentry)
671 goto err_cleanup;
672 fentry = debugfs_create_file("error_type", S_IRUSR | S_IWUSR,
673 einj_debug_dir, NULL, &error_type_fops);
674 if (!fentry)
675 goto err_cleanup;
676 fentry = debugfs_create_file("error_inject", S_IWUSR,
677 einj_debug_dir, NULL, &error_inject_fops);
678 if (!fentry)
679 goto err_cleanup;
680
681 apei_resources_init(&einj_resources);
682 einj_exec_ctx_init(&ctx);
683 rc = apei_exec_collect_resources(&ctx, &einj_resources);
684 if (rc)
685 goto err_fini;
686 rc = apei_resources_request(&einj_resources, "APEI EINJ");
687 if (rc)
688 goto err_fini;
689 rc = apei_exec_pre_map_gars(&ctx);
690 if (rc)
691 goto err_release;
692
693 einj_param = einj_get_parameter_address();
694 if ((param_extension || acpi5) && einj_param) {
695 fentry = debugfs_create_x64("param1", S_IRUSR | S_IWUSR,
696 einj_debug_dir, &error_param1);
697 if (!fentry)
698 goto err_unmap;
699 fentry = debugfs_create_x64("param2", S_IRUSR | S_IWUSR,
700 einj_debug_dir, &error_param2);
701 if (!fentry)
702 goto err_unmap;
703 }
704
705 if (vendor_dev[0]) {
706 vendor_blob.data = vendor_dev;
707 vendor_blob.size = strlen(vendor_dev);
708 fentry = debugfs_create_blob("vendor", S_IRUSR,
709 einj_debug_dir, &vendor_blob);
710 if (!fentry)
711 goto err_unmap;
712 fentry = debugfs_create_x32("vendor_flags", S_IRUSR | S_IWUSR,
713 einj_debug_dir, &vendor_flags);
714 if (!fentry)
715 goto err_unmap;
716 }
717
718 pr_info(EINJ_PFX "Error INJection is initialized.\n");
719
720 return 0;
721
722 err_unmap:
723 if (einj_param) {
724 acpi_size size = (acpi5) ?
725 sizeof(struct set_error_type_with_address) :
726 sizeof(struct einj_parameter);
727
728 acpi_os_unmap_memory(einj_param, size);
729 }
730 apei_exec_post_unmap_gars(&ctx);
731 err_release:
732 apei_resources_release(&einj_resources);
733 err_fini:
734 apei_resources_fini(&einj_resources);
735 err_cleanup:
736 debugfs_remove_recursive(einj_debug_dir);
737
738 return rc;
739 }
740
741 static void __exit einj_exit(void)
742 {
743 struct apei_exec_context ctx;
744
745 if (einj_param) {
746 acpi_size size = (acpi5) ?
747 sizeof(struct set_error_type_with_address) :
748 sizeof(struct einj_parameter);
749
750 acpi_os_unmap_memory(einj_param, size);
751 }
752 einj_exec_ctx_init(&ctx);
753 apei_exec_post_unmap_gars(&ctx);
754 apei_resources_release(&einj_resources);
755 apei_resources_fini(&einj_resources);
756 debugfs_remove_recursive(einj_debug_dir);
757 }
758
759 module_init(einj_init);
760 module_exit(einj_exit);
761
762 MODULE_AUTHOR("Huang Ying");
763 MODULE_DESCRIPTION("APEI Error INJection support");
764 MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)