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1/*
2 * Copyright 2018 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 *
23 */
24#include <linux/debugfs.h>
25#include <linux/list.h>
26#include <linux/module.h>
27#include <linux/uaccess.h>
28
29#include "amdgpu.h"
30#include "amdgpu_ras.h"
31#include "amdgpu_atomfirmware.h"
32
33const char *ras_error_string[] = {
34 "none",
35 "parity",
36 "single_correctable",
37 "multi_uncorrectable",
38 "poison",
39};
40
41const char *ras_block_string[] = {
42 "umc",
43 "sdma",
44 "gfx",
45 "mmhub",
46 "athub",
47 "pcie_bif",
48 "hdp",
49 "xgmi_wafl",
50 "df",
51 "smn",
52 "sem",
53 "mp0",
54 "mp1",
55 "fuse",
56};
57
58#define ras_err_str(i) (ras_error_string[ffs(i)])
59#define ras_block_str(i) (ras_block_string[i])
60
61#define AMDGPU_RAS_FLAG_INIT_BY_VBIOS 1
62#define AMDGPU_RAS_FLAG_INIT_NEED_RESET 2
63#define RAS_DEFAULT_FLAGS (AMDGPU_RAS_FLAG_INIT_BY_VBIOS)
64
65/* inject address is 52 bits */
66#define RAS_UMC_INJECT_ADDR_LIMIT (0x1ULL << 52)
67
68static int amdgpu_ras_reserve_vram(struct amdgpu_device *adev,
69 uint64_t offset, uint64_t size,
70 struct amdgpu_bo **bo_ptr);
71static int amdgpu_ras_release_vram(struct amdgpu_device *adev,
72 struct amdgpu_bo **bo_ptr);
73
74static ssize_t amdgpu_ras_debugfs_read(struct file *f, char __user *buf,
75 size_t size, loff_t *pos)
76{
77 struct ras_manager *obj = (struct ras_manager *)file_inode(f)->i_private;
78 struct ras_query_if info = {
79 .head = obj->head,
80 };
81 ssize_t s;
82 char val[128];
83
84 if (amdgpu_ras_error_query(obj->adev, &info))
85 return -EINVAL;
86
87 s = snprintf(val, sizeof(val), "%s: %lu\n%s: %lu\n",
88 "ue", info.ue_count,
89 "ce", info.ce_count);
90 if (*pos >= s)
91 return 0;
92
93 s -= *pos;
94 s = min_t(u64, s, size);
95
96
97 if (copy_to_user(buf, &val[*pos], s))
98 return -EINVAL;
99
100 *pos += s;
101
102 return s;
103}
104
105static const struct file_operations amdgpu_ras_debugfs_ops = {
106 .owner = THIS_MODULE,
107 .read = amdgpu_ras_debugfs_read,
108 .write = NULL,
109 .llseek = default_llseek
110};
111
112static int amdgpu_ras_find_block_id_by_name(const char *name, int *block_id)
113{
114 int i;
115
116 for (i = 0; i < ARRAY_SIZE(ras_block_string); i++) {
117 *block_id = i;
118 if (strcmp(name, ras_block_str(i)) == 0)
119 return 0;
120 }
121 return -EINVAL;
122}
123
124static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f,
125 const char __user *buf, size_t size,
126 loff_t *pos, struct ras_debug_if *data)
127{
128 ssize_t s = min_t(u64, 64, size);
129 char str[65];
130 char block_name[33];
131 char err[9] = "ue";
132 int op = -1;
133 int block_id;
134 uint32_t sub_block;
135 u64 address, value;
136
137 if (*pos)
138 return -EINVAL;
139 *pos = size;
140
141 memset(str, 0, sizeof(str));
142 memset(data, 0, sizeof(*data));
143
144 if (copy_from_user(str, buf, s))
145 return -EINVAL;
146
147 if (sscanf(str, "disable %32s", block_name) == 1)
148 op = 0;
149 else if (sscanf(str, "enable %32s %8s", block_name, err) == 2)
150 op = 1;
151 else if (sscanf(str, "inject %32s %8s", block_name, err) == 2)
152 op = 2;
153 else if (str[0] && str[1] && str[2] && str[3])
154 /* ascii string, but commands are not matched. */
155 return -EINVAL;
156
157 if (op != -1) {
158 if (amdgpu_ras_find_block_id_by_name(block_name, &block_id))
159 return -EINVAL;
160
161 data->head.block = block_id;
162 /* only ue and ce errors are supported */
163 if (!memcmp("ue", err, 2))
164 data->head.type = AMDGPU_RAS_ERROR__MULTI_UNCORRECTABLE;
165 else if (!memcmp("ce", err, 2))
166 data->head.type = AMDGPU_RAS_ERROR__SINGLE_CORRECTABLE;
167 else
168 return -EINVAL;
169
170 data->op = op;
171
172 if (op == 2) {
173 if (sscanf(str, "%*s %*s %*s %u %llu %llu",
174 &sub_block, &address, &value) != 3)
175 if (sscanf(str, "%*s %*s %*s 0x%x 0x%llx 0x%llx",
176 &sub_block, &address, &value) != 3)
177 return -EINVAL;
178 data->head.sub_block_index = sub_block;
179 data->inject.address = address;
180 data->inject.value = value;
181 }
182 } else {
183 if (size < sizeof(*data))
184 return -EINVAL;
185
186 if (copy_from_user(data, buf, sizeof(*data)))
187 return -EINVAL;
188 }
189
190 return 0;
191}
192/**
193 * DOC: AMDGPU RAS debugfs control interface
194 *
195 * It accepts struct ras_debug_if who has two members.
196 *
197 * First member: ras_debug_if::head or ras_debug_if::inject.
198 *
199 * head is used to indicate which IP block will be under control.
200 *
201 * head has four members, they are block, type, sub_block_index, name.
202 * block: which IP will be under control.
203 * type: what kind of error will be enabled/disabled/injected.
204 * sub_block_index: some IPs have subcomponets. say, GFX, sDMA.
205 * name: the name of IP.
206 *
207 * inject has two more members than head, they are address, value.
208 * As their names indicate, inject operation will write the
209 * value to the address.
210 *
211 * Second member: struct ras_debug_if::op.
212 * It has three kinds of operations.
213 * 0: disable RAS on the block. Take ::head as its data.
214 * 1: enable RAS on the block. Take ::head as its data.
215 * 2: inject errors on the block. Take ::inject as its data.
216 *
217 * How to use the interface?
218 * programs:
219 * copy the struct ras_debug_if in your codes and initialize it.
220 * write the struct to the control node.
221 *
222 * bash:
223 * echo op block [error [sub_blcok address value]] > .../ras/ras_ctrl
224 * op: disable, enable, inject
225 * disable: only block is needed
226 * enable: block and error are needed
227 * inject: error, address, value are needed
228 * block: umc, smda, gfx, .........
229 * see ras_block_string[] for details
230 * error: ue, ce
231 * ue: multi_uncorrectable
232 * ce: single_correctable
233 * sub_block: sub block index, pass 0 if there is no sub block
234 *
235 * here are some examples for bash commands,
236 * echo inject umc ue 0x0 0x0 0x0 > /sys/kernel/debug/dri/0/ras/ras_ctrl
237 * echo inject umc ce 0 0 0 > /sys/kernel/debug/dri/0/ras/ras_ctrl
238 * echo disable umc > /sys/kernel/debug/dri/0/ras/ras_ctrl
239 *
240 * How to check the result?
241 *
242 * For disable/enable, please check ras features at
243 * /sys/class/drm/card[0/1/2...]/device/ras/features
244 *
245 * For inject, please check corresponding err count at
246 * /sys/class/drm/card[0/1/2...]/device/ras/[gfx/sdma/...]_err_count
247 *
248 * NOTE: operation is only allowed on blocks which are supported.
249 * Please check ras mask at /sys/module/amdgpu/parameters/ras_mask
250 */
251static ssize_t amdgpu_ras_debugfs_ctrl_write(struct file *f, const char __user *buf,
252 size_t size, loff_t *pos)
253{
254 struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
255 struct ras_debug_if data;
256 int ret = 0;
257
258 ret = amdgpu_ras_debugfs_ctrl_parse_data(f, buf, size, pos, &data);
259 if (ret)
260 return -EINVAL;
261
262 if (!amdgpu_ras_is_supported(adev, data.head.block))
263 return -EINVAL;
264
265 switch (data.op) {
266 case 0:
267 ret = amdgpu_ras_feature_enable(adev, &data.head, 0);
268 break;
269 case 1:
270 ret = amdgpu_ras_feature_enable(adev, &data.head, 1);
271 break;
272 case 2:
273 if ((data.inject.address >= adev->gmc.mc_vram_size) ||
274 (data.inject.address >= RAS_UMC_INJECT_ADDR_LIMIT)) {
275 ret = -EINVAL;
276 break;
277 }
278
279 /* data.inject.address is offset instead of absolute gpu address */
280 ret = amdgpu_ras_error_inject(adev, &data.inject);
281 break;
282 default:
283 ret = -EINVAL;
284 break;
285 };
286
287 if (ret)
288 return -EINVAL;
289
290 return size;
291}
292
293static const struct file_operations amdgpu_ras_debugfs_ctrl_ops = {
294 .owner = THIS_MODULE,
295 .read = NULL,
296 .write = amdgpu_ras_debugfs_ctrl_write,
297 .llseek = default_llseek
298};
299
300static ssize_t amdgpu_ras_sysfs_read(struct device *dev,
301 struct device_attribute *attr, char *buf)
302{
303 struct ras_manager *obj = container_of(attr, struct ras_manager, sysfs_attr);
304 struct ras_query_if info = {
305 .head = obj->head,
306 };
307
308 if (amdgpu_ras_error_query(obj->adev, &info))
309 return -EINVAL;
310
311 return snprintf(buf, PAGE_SIZE, "%s: %lu\n%s: %lu\n",
312 "ue", info.ue_count,
313 "ce", info.ce_count);
314}
315
316/* obj begin */
317
318#define get_obj(obj) do { (obj)->use++; } while (0)
319#define alive_obj(obj) ((obj)->use)
320
321static inline void put_obj(struct ras_manager *obj)
322{
323 if (obj && --obj->use == 0)
324 list_del(&obj->node);
325 if (obj && obj->use < 0) {
326 DRM_ERROR("RAS ERROR: Unbalance obj(%s) use\n", obj->head.name);
327 }
328}
329
330/* make one obj and return it. */
331static struct ras_manager *amdgpu_ras_create_obj(struct amdgpu_device *adev,
332 struct ras_common_if *head)
333{
334 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
335 struct ras_manager *obj;
336
337 if (!con)
338 return NULL;
339
340 if (head->block >= AMDGPU_RAS_BLOCK_COUNT)
341 return NULL;
342
343 obj = &con->objs[head->block];
344 /* already exist. return obj? */
345 if (alive_obj(obj))
346 return NULL;
347
348 obj->head = *head;
349 obj->adev = adev;
350 list_add(&obj->node, &con->head);
351 get_obj(obj);
352
353 return obj;
354}
355
356/* return an obj equal to head, or the first when head is NULL */
357static struct ras_manager *amdgpu_ras_find_obj(struct amdgpu_device *adev,
358 struct ras_common_if *head)
359{
360 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
361 struct ras_manager *obj;
362 int i;
363
364 if (!con)
365 return NULL;
366
367 if (head) {
368 if (head->block >= AMDGPU_RAS_BLOCK_COUNT)
369 return NULL;
370
371 obj = &con->objs[head->block];
372
373 if (alive_obj(obj)) {
374 WARN_ON(head->block != obj->head.block);
375 return obj;
376 }
377 } else {
378 for (i = 0; i < AMDGPU_RAS_BLOCK_COUNT; i++) {
379 obj = &con->objs[i];
380 if (alive_obj(obj)) {
381 WARN_ON(i != obj->head.block);
382 return obj;
383 }
384 }
385 }
386
387 return NULL;
388}
389/* obj end */
390
391/* feature ctl begin */
392static int amdgpu_ras_is_feature_allowed(struct amdgpu_device *adev,
393 struct ras_common_if *head)
394{
395 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
396
397 return con->hw_supported & BIT(head->block);
398}
399
400static int amdgpu_ras_is_feature_enabled(struct amdgpu_device *adev,
401 struct ras_common_if *head)
402{
403 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
404
405 return con->features & BIT(head->block);
406}
407
408/*
409 * if obj is not created, then create one.
410 * set feature enable flag.
411 */
412static int __amdgpu_ras_feature_enable(struct amdgpu_device *adev,
413 struct ras_common_if *head, int enable)
414{
415 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
416 struct ras_manager *obj = amdgpu_ras_find_obj(adev, head);
417
418 /* If hardware does not support ras, then do not create obj.
419 * But if hardware support ras, we can create the obj.
420 * Ras framework checks con->hw_supported to see if it need do
421 * corresponding initialization.
422 * IP checks con->support to see if it need disable ras.
423 */
424 if (!amdgpu_ras_is_feature_allowed(adev, head))
425 return 0;
426 if (!(!!enable ^ !!amdgpu_ras_is_feature_enabled(adev, head)))
427 return 0;
428
429 if (enable) {
430 if (!obj) {
431 obj = amdgpu_ras_create_obj(adev, head);
432 if (!obj)
433 return -EINVAL;
434 } else {
435 /* In case we create obj somewhere else */
436 get_obj(obj);
437 }
438 con->features |= BIT(head->block);
439 } else {
440 if (obj && amdgpu_ras_is_feature_enabled(adev, head)) {
441 con->features &= ~BIT(head->block);
442 put_obj(obj);
443 }
444 }
445
446 return 0;
447}
448
449/* wrapper of psp_ras_enable_features */
450int amdgpu_ras_feature_enable(struct amdgpu_device *adev,
451 struct ras_common_if *head, bool enable)
452{
453 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
454 union ta_ras_cmd_input info;
455 int ret;
456
457 if (!con)
458 return -EINVAL;
459
460 if (!enable) {
461 info.disable_features = (struct ta_ras_disable_features_input) {
462 .block_id = amdgpu_ras_block_to_ta(head->block),
463 .error_type = amdgpu_ras_error_to_ta(head->type),
464 };
465 } else {
466 info.enable_features = (struct ta_ras_enable_features_input) {
467 .block_id = amdgpu_ras_block_to_ta(head->block),
468 .error_type = amdgpu_ras_error_to_ta(head->type),
469 };
470 }
471
472 /* Do not enable if it is not allowed. */
473 WARN_ON(enable && !amdgpu_ras_is_feature_allowed(adev, head));
474 /* Are we alerady in that state we are going to set? */
475 if (!(!!enable ^ !!amdgpu_ras_is_feature_enabled(adev, head)))
476 return 0;
477
478 ret = psp_ras_enable_features(&adev->psp, &info, enable);
479 if (ret) {
480 DRM_ERROR("RAS ERROR: %s %s feature failed ret %d\n",
481 enable ? "enable":"disable",
482 ras_block_str(head->block),
483 ret);
484 if (ret == TA_RAS_STATUS__RESET_NEEDED)
485 return -EAGAIN;
486 return -EINVAL;
487 }
488
489 /* setup the obj */
490 __amdgpu_ras_feature_enable(adev, head, enable);
491
492 return 0;
493}
494
495/* Only used in device probe stage and called only once. */
496int amdgpu_ras_feature_enable_on_boot(struct amdgpu_device *adev,
497 struct ras_common_if *head, bool enable)
498{
499 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
500 int ret;
501
502 if (!con)
503 return -EINVAL;
504
505 if (con->flags & AMDGPU_RAS_FLAG_INIT_BY_VBIOS) {
506 if (enable) {
507 /* There is no harm to issue a ras TA cmd regardless of
508 * the currecnt ras state.
509 * If current state == target state, it will do nothing
510 * But sometimes it requests driver to reset and repost
511 * with error code -EAGAIN.
512 */
513 ret = amdgpu_ras_feature_enable(adev, head, 1);
514 /* With old ras TA, we might fail to enable ras.
515 * Log it and just setup the object.
516 * TODO need remove this WA in the future.
517 */
518 if (ret == -EINVAL) {
519 ret = __amdgpu_ras_feature_enable(adev, head, 1);
520 if (!ret)
521 DRM_INFO("RAS INFO: %s setup object\n",
522 ras_block_str(head->block));
523 }
524 } else {
525 /* setup the object then issue a ras TA disable cmd.*/
526 ret = __amdgpu_ras_feature_enable(adev, head, 1);
527 if (ret)
528 return ret;
529
530 ret = amdgpu_ras_feature_enable(adev, head, 0);
531 }
532 } else
533 ret = amdgpu_ras_feature_enable(adev, head, enable);
534
535 return ret;
536}
537
538static int amdgpu_ras_disable_all_features(struct amdgpu_device *adev,
539 bool bypass)
540{
541 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
542 struct ras_manager *obj, *tmp;
543
544 list_for_each_entry_safe(obj, tmp, &con->head, node) {
545 /* bypass psp.
546 * aka just release the obj and corresponding flags
547 */
548 if (bypass) {
549 if (__amdgpu_ras_feature_enable(adev, &obj->head, 0))
550 break;
551 } else {
552 if (amdgpu_ras_feature_enable(adev, &obj->head, 0))
553 break;
554 }
555 }
556
557 return con->features;
558}
559
560static int amdgpu_ras_enable_all_features(struct amdgpu_device *adev,
561 bool bypass)
562{
563 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
564 int ras_block_count = AMDGPU_RAS_BLOCK_COUNT;
565 int i;
566 const enum amdgpu_ras_error_type default_ras_type =
567 AMDGPU_RAS_ERROR__NONE;
568
569 for (i = 0; i < ras_block_count; i++) {
570 struct ras_common_if head = {
571 .block = i,
572 .type = default_ras_type,
573 .sub_block_index = 0,
574 };
575 strcpy(head.name, ras_block_str(i));
576 if (bypass) {
577 /*
578 * bypass psp. vbios enable ras for us.
579 * so just create the obj
580 */
581 if (__amdgpu_ras_feature_enable(adev, &head, 1))
582 break;
583 } else {
584 if (amdgpu_ras_feature_enable(adev, &head, 1))
585 break;
586 }
587 }
588
589 return con->features;
590}
591/* feature ctl end */
592
593/* query/inject/cure begin */
594int amdgpu_ras_error_query(struct amdgpu_device *adev,
595 struct ras_query_if *info)
596{
597 struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head);
598 struct ras_err_data err_data = {0, 0, 0, NULL};
599
600 if (!obj)
601 return -EINVAL;
602
603 switch (info->head.block) {
604 case AMDGPU_RAS_BLOCK__UMC:
605 if (adev->umc.funcs->query_ras_error_count)
606 adev->umc.funcs->query_ras_error_count(adev, &err_data);
607 /* umc query_ras_error_address is also responsible for clearing
608 * error status
609 */
610 if (adev->umc.funcs->query_ras_error_address)
611 adev->umc.funcs->query_ras_error_address(adev, &err_data);
612 break;
613 case AMDGPU_RAS_BLOCK__GFX:
614 if (adev->gfx.funcs->query_ras_error_count)
615 adev->gfx.funcs->query_ras_error_count(adev, &err_data);
616 break;
617 case AMDGPU_RAS_BLOCK__MMHUB:
618 if (adev->mmhub_funcs->query_ras_error_count)
619 adev->mmhub_funcs->query_ras_error_count(adev, &err_data);
620 break;
621 default:
622 break;
623 }
624
625 obj->err_data.ue_count += err_data.ue_count;
626 obj->err_data.ce_count += err_data.ce_count;
627
628 info->ue_count = obj->err_data.ue_count;
629 info->ce_count = obj->err_data.ce_count;
630
631 if (err_data.ce_count)
632 dev_info(adev->dev, "%ld correctable errors detected in %s block\n",
633 obj->err_data.ce_count, ras_block_str(info->head.block));
634 if (err_data.ue_count)
635 dev_info(adev->dev, "%ld uncorrectable errors detected in %s block\n",
636 obj->err_data.ue_count, ras_block_str(info->head.block));
637
638 return 0;
639}
640
641/* wrapper of psp_ras_trigger_error */
642int amdgpu_ras_error_inject(struct amdgpu_device *adev,
643 struct ras_inject_if *info)
644{
645 struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head);
646 struct ta_ras_trigger_error_input block_info = {
647 .block_id = amdgpu_ras_block_to_ta(info->head.block),
648 .inject_error_type = amdgpu_ras_error_to_ta(info->head.type),
649 .sub_block_index = info->head.sub_block_index,
650 .address = info->address,
651 .value = info->value,
652 };
653 int ret = 0;
654
655 if (!obj)
656 return -EINVAL;
657
658 switch (info->head.block) {
659 case AMDGPU_RAS_BLOCK__GFX:
660 if (adev->gfx.funcs->ras_error_inject)
661 ret = adev->gfx.funcs->ras_error_inject(adev, info);
662 else
663 ret = -EINVAL;
664 break;
665 case AMDGPU_RAS_BLOCK__UMC:
666 case AMDGPU_RAS_BLOCK__MMHUB:
667 ret = psp_ras_trigger_error(&adev->psp, &block_info);
668 break;
669 default:
670 DRM_INFO("%s error injection is not supported yet\n",
671 ras_block_str(info->head.block));
672 ret = -EINVAL;
673 }
674
675 if (ret)
676 DRM_ERROR("RAS ERROR: inject %s error failed ret %d\n",
677 ras_block_str(info->head.block),
678 ret);
679
680 return ret;
681}
682
683int amdgpu_ras_error_cure(struct amdgpu_device *adev,
684 struct ras_cure_if *info)
685{
686 /* psp fw has no cure interface for now. */
687 return 0;
688}
689
690/* get the total error counts on all IPs */
691unsigned long amdgpu_ras_query_error_count(struct amdgpu_device *adev,
692 bool is_ce)
693{
694 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
695 struct ras_manager *obj;
696 struct ras_err_data data = {0, 0};
697
698 if (!con)
699 return 0;
700
701 list_for_each_entry(obj, &con->head, node) {
702 struct ras_query_if info = {
703 .head = obj->head,
704 };
705
706 if (amdgpu_ras_error_query(adev, &info))
707 return 0;
708
709 data.ce_count += info.ce_count;
710 data.ue_count += info.ue_count;
711 }
712
713 return is_ce ? data.ce_count : data.ue_count;
714}
715/* query/inject/cure end */
716
717
718/* sysfs begin */
719
720static int amdgpu_ras_badpages_read(struct amdgpu_device *adev,
721 struct ras_badpage **bps, unsigned int *count);
722
723static char *amdgpu_ras_badpage_flags_str(unsigned int flags)
724{
725 switch (flags) {
726 case 0:
727 return "R";
728 case 1:
729 return "P";
730 case 2:
731 default:
732 return "F";
733 };
734}
735
736/*
737 * DOC: ras sysfs gpu_vram_bad_pages interface
738 *
739 * It allows user to read the bad pages of vram on the gpu through
740 * /sys/class/drm/card[0/1/2...]/device/ras/gpu_vram_bad_pages
741 *
742 * It outputs multiple lines, and each line stands for one gpu page.
743 *
744 * The format of one line is below,
745 * gpu pfn : gpu page size : flags
746 *
747 * gpu pfn and gpu page size are printed in hex format.
748 * flags can be one of below character,
749 * R: reserved, this gpu page is reserved and not able to use.
750 * P: pending for reserve, this gpu page is marked as bad, will be reserved
751 * in next window of page_reserve.
752 * F: unable to reserve. this gpu page can't be reserved due to some reasons.
753 *
754 * examples:
755 * 0x00000001 : 0x00001000 : R
756 * 0x00000002 : 0x00001000 : P
757 */
758
759static ssize_t amdgpu_ras_sysfs_badpages_read(struct file *f,
760 struct kobject *kobj, struct bin_attribute *attr,
761 char *buf, loff_t ppos, size_t count)
762{
763 struct amdgpu_ras *con =
764 container_of(attr, struct amdgpu_ras, badpages_attr);
765 struct amdgpu_device *adev = con->adev;
766 const unsigned int element_size =
767 sizeof("0xabcdabcd : 0x12345678 : R\n") - 1;
768 unsigned int start = div64_ul(ppos + element_size - 1, element_size);
769 unsigned int end = div64_ul(ppos + count - 1, element_size);
770 ssize_t s = 0;
771 struct ras_badpage *bps = NULL;
772 unsigned int bps_count = 0;
773
774 memset(buf, 0, count);
775
776 if (amdgpu_ras_badpages_read(adev, &bps, &bps_count))
777 return 0;
778
779 for (; start < end && start < bps_count; start++)
780 s += scnprintf(&buf[s], element_size + 1,
781 "0x%08x : 0x%08x : %1s\n",
782 bps[start].bp,
783 bps[start].size,
784 amdgpu_ras_badpage_flags_str(bps[start].flags));
785
786 kfree(bps);
787
788 return s;
789}
790
791static ssize_t amdgpu_ras_sysfs_features_read(struct device *dev,
792 struct device_attribute *attr, char *buf)
793{
794 struct amdgpu_ras *con =
795 container_of(attr, struct amdgpu_ras, features_attr);
796
797 return scnprintf(buf, PAGE_SIZE, "feature mask: 0x%x\n", con->features);
798}
799
800static int amdgpu_ras_sysfs_create_feature_node(struct amdgpu_device *adev)
801{
802 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
803 struct attribute *attrs[] = {
804 &con->features_attr.attr,
805 NULL
806 };
807 struct bin_attribute *bin_attrs[] = {
808 &con->badpages_attr,
809 NULL
810 };
811 struct attribute_group group = {
812 .name = "ras",
813 .attrs = attrs,
814 .bin_attrs = bin_attrs,
815 };
816
817 con->features_attr = (struct device_attribute) {
818 .attr = {
819 .name = "features",
820 .mode = S_IRUGO,
821 },
822 .show = amdgpu_ras_sysfs_features_read,
823 };
824
825 con->badpages_attr = (struct bin_attribute) {
826 .attr = {
827 .name = "gpu_vram_bad_pages",
828 .mode = S_IRUGO,
829 },
830 .size = 0,
831 .private = NULL,
832 .read = amdgpu_ras_sysfs_badpages_read,
833 };
834
835 sysfs_attr_init(attrs[0]);
836 sysfs_bin_attr_init(bin_attrs[0]);
837
838 return sysfs_create_group(&adev->dev->kobj, &group);
839}
840
841static int amdgpu_ras_sysfs_remove_feature_node(struct amdgpu_device *adev)
842{
843 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
844 struct attribute *attrs[] = {
845 &con->features_attr.attr,
846 NULL
847 };
848 struct bin_attribute *bin_attrs[] = {
849 &con->badpages_attr,
850 NULL
851 };
852 struct attribute_group group = {
853 .name = "ras",
854 .attrs = attrs,
855 .bin_attrs = bin_attrs,
856 };
857
858 sysfs_remove_group(&adev->dev->kobj, &group);
859
860 return 0;
861}
862
863int amdgpu_ras_sysfs_create(struct amdgpu_device *adev,
864 struct ras_fs_if *head)
865{
866 struct ras_manager *obj = amdgpu_ras_find_obj(adev, &head->head);
867
868 if (!obj || obj->attr_inuse)
869 return -EINVAL;
870
871 get_obj(obj);
872
873 memcpy(obj->fs_data.sysfs_name,
874 head->sysfs_name,
875 sizeof(obj->fs_data.sysfs_name));
876
877 obj->sysfs_attr = (struct device_attribute){
878 .attr = {
879 .name = obj->fs_data.sysfs_name,
880 .mode = S_IRUGO,
881 },
882 .show = amdgpu_ras_sysfs_read,
883 };
884 sysfs_attr_init(&obj->sysfs_attr.attr);
885
886 if (sysfs_add_file_to_group(&adev->dev->kobj,
887 &obj->sysfs_attr.attr,
888 "ras")) {
889 put_obj(obj);
890 return -EINVAL;
891 }
892
893 obj->attr_inuse = 1;
894
895 return 0;
896}
897
898int amdgpu_ras_sysfs_remove(struct amdgpu_device *adev,
899 struct ras_common_if *head)
900{
901 struct ras_manager *obj = amdgpu_ras_find_obj(adev, head);
902
903 if (!obj || !obj->attr_inuse)
904 return -EINVAL;
905
906 sysfs_remove_file_from_group(&adev->dev->kobj,
907 &obj->sysfs_attr.attr,
908 "ras");
909 obj->attr_inuse = 0;
910 put_obj(obj);
911
912 return 0;
913}
914
915static int amdgpu_ras_sysfs_remove_all(struct amdgpu_device *adev)
916{
917 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
918 struct ras_manager *obj, *tmp;
919
920 list_for_each_entry_safe(obj, tmp, &con->head, node) {
921 amdgpu_ras_sysfs_remove(adev, &obj->head);
922 }
923
924 amdgpu_ras_sysfs_remove_feature_node(adev);
925
926 return 0;
927}
928/* sysfs end */
929
930/* debugfs begin */
931static void amdgpu_ras_debugfs_create_ctrl_node(struct amdgpu_device *adev)
932{
933 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
934 struct drm_minor *minor = adev->ddev->primary;
935
936 con->dir = debugfs_create_dir("ras", minor->debugfs_root);
937 con->ent = debugfs_create_file("ras_ctrl", S_IWUGO | S_IRUGO, con->dir,
938 adev, &amdgpu_ras_debugfs_ctrl_ops);
939}
940
941void amdgpu_ras_debugfs_create(struct amdgpu_device *adev,
942 struct ras_fs_if *head)
943{
944 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
945 struct ras_manager *obj = amdgpu_ras_find_obj(adev, &head->head);
946
947 if (!obj || obj->ent)
948 return;
949
950 get_obj(obj);
951
952 memcpy(obj->fs_data.debugfs_name,
953 head->debugfs_name,
954 sizeof(obj->fs_data.debugfs_name));
955
956 obj->ent = debugfs_create_file(obj->fs_data.debugfs_name,
957 S_IWUGO | S_IRUGO, con->dir, obj,
958 &amdgpu_ras_debugfs_ops);
959}
960
961void amdgpu_ras_debugfs_remove(struct amdgpu_device *adev,
962 struct ras_common_if *head)
963{
964 struct ras_manager *obj = amdgpu_ras_find_obj(adev, head);
965
966 if (!obj || !obj->ent)
967 return;
968
969 debugfs_remove(obj->ent);
970 obj->ent = NULL;
971 put_obj(obj);
972}
973
974static void amdgpu_ras_debugfs_remove_all(struct amdgpu_device *adev)
975{
976 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
977 struct ras_manager *obj, *tmp;
978
979 list_for_each_entry_safe(obj, tmp, &con->head, node) {
980 amdgpu_ras_debugfs_remove(adev, &obj->head);
981 }
982
983 debugfs_remove(con->ent);
984 debugfs_remove(con->dir);
985 con->dir = NULL;
986 con->ent = NULL;
987}
988/* debugfs end */
989
990/* ras fs */
991
992static int amdgpu_ras_fs_init(struct amdgpu_device *adev)
993{
994 amdgpu_ras_sysfs_create_feature_node(adev);
995 amdgpu_ras_debugfs_create_ctrl_node(adev);
996
997 return 0;
998}
999
1000static int amdgpu_ras_fs_fini(struct amdgpu_device *adev)
1001{
1002 amdgpu_ras_debugfs_remove_all(adev);
1003 amdgpu_ras_sysfs_remove_all(adev);
1004 return 0;
1005}
1006/* ras fs end */
1007
1008/* ih begin */
1009static void amdgpu_ras_interrupt_handler(struct ras_manager *obj)
1010{
1011 struct ras_ih_data *data = &obj->ih_data;
1012 struct amdgpu_iv_entry entry;
1013 int ret;
1014 struct ras_err_data err_data = {0, 0, 0, NULL};
1015
1016 while (data->rptr != data->wptr) {
1017 rmb();
1018 memcpy(&entry, &data->ring[data->rptr],
1019 data->element_size);
1020
1021 wmb();
1022 data->rptr = (data->aligned_element_size +
1023 data->rptr) % data->ring_size;
1024
1025 /* Let IP handle its data, maybe we need get the output
1026 * from the callback to udpate the error type/count, etc
1027 */
1028 if (data->cb) {
1029 ret = data->cb(obj->adev, &err_data, &entry);
1030 /* ue will trigger an interrupt, and in that case
1031 * we need do a reset to recovery the whole system.
1032 * But leave IP do that recovery, here we just dispatch
1033 * the error.
1034 */
1035 if (ret == AMDGPU_RAS_SUCCESS) {
1036 /* these counts could be left as 0 if
1037 * some blocks do not count error number
1038 */
1039 obj->err_data.ue_count += err_data.ue_count;
1040 obj->err_data.ce_count += err_data.ce_count;
1041 }
1042 }
1043 }
1044}
1045
1046static void amdgpu_ras_interrupt_process_handler(struct work_struct *work)
1047{
1048 struct ras_ih_data *data =
1049 container_of(work, struct ras_ih_data, ih_work);
1050 struct ras_manager *obj =
1051 container_of(data, struct ras_manager, ih_data);
1052
1053 amdgpu_ras_interrupt_handler(obj);
1054}
1055
1056int amdgpu_ras_interrupt_dispatch(struct amdgpu_device *adev,
1057 struct ras_dispatch_if *info)
1058{
1059 struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head);
1060 struct ras_ih_data *data = &obj->ih_data;
1061
1062 if (!obj)
1063 return -EINVAL;
1064
1065 if (data->inuse == 0)
1066 return 0;
1067
1068 /* Might be overflow... */
1069 memcpy(&data->ring[data->wptr], info->entry,
1070 data->element_size);
1071
1072 wmb();
1073 data->wptr = (data->aligned_element_size +
1074 data->wptr) % data->ring_size;
1075
1076 schedule_work(&data->ih_work);
1077
1078 return 0;
1079}
1080
1081int amdgpu_ras_interrupt_remove_handler(struct amdgpu_device *adev,
1082 struct ras_ih_if *info)
1083{
1084 struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head);
1085 struct ras_ih_data *data;
1086
1087 if (!obj)
1088 return -EINVAL;
1089
1090 data = &obj->ih_data;
1091 if (data->inuse == 0)
1092 return 0;
1093
1094 cancel_work_sync(&data->ih_work);
1095
1096 kfree(data->ring);
1097 memset(data, 0, sizeof(*data));
1098 put_obj(obj);
1099
1100 return 0;
1101}
1102
1103int amdgpu_ras_interrupt_add_handler(struct amdgpu_device *adev,
1104 struct ras_ih_if *info)
1105{
1106 struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head);
1107 struct ras_ih_data *data;
1108
1109 if (!obj) {
1110 /* in case we registe the IH before enable ras feature */
1111 obj = amdgpu_ras_create_obj(adev, &info->head);
1112 if (!obj)
1113 return -EINVAL;
1114 } else
1115 get_obj(obj);
1116
1117 data = &obj->ih_data;
1118 /* add the callback.etc */
1119 *data = (struct ras_ih_data) {
1120 .inuse = 0,
1121 .cb = info->cb,
1122 .element_size = sizeof(struct amdgpu_iv_entry),
1123 .rptr = 0,
1124 .wptr = 0,
1125 };
1126
1127 INIT_WORK(&data->ih_work, amdgpu_ras_interrupt_process_handler);
1128
1129 data->aligned_element_size = ALIGN(data->element_size, 8);
1130 /* the ring can store 64 iv entries. */
1131 data->ring_size = 64 * data->aligned_element_size;
1132 data->ring = kmalloc(data->ring_size, GFP_KERNEL);
1133 if (!data->ring) {
1134 put_obj(obj);
1135 return -ENOMEM;
1136 }
1137
1138 /* IH is ready */
1139 data->inuse = 1;
1140
1141 return 0;
1142}
1143
1144static int amdgpu_ras_interrupt_remove_all(struct amdgpu_device *adev)
1145{
1146 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1147 struct ras_manager *obj, *tmp;
1148
1149 list_for_each_entry_safe(obj, tmp, &con->head, node) {
1150 struct ras_ih_if info = {
1151 .head = obj->head,
1152 };
1153 amdgpu_ras_interrupt_remove_handler(adev, &info);
1154 }
1155
1156 return 0;
1157}
1158/* ih end */
1159
1160/* recovery begin */
1161
1162/* return 0 on success.
1163 * caller need free bps.
1164 */
1165static int amdgpu_ras_badpages_read(struct amdgpu_device *adev,
1166 struct ras_badpage **bps, unsigned int *count)
1167{
1168 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1169 struct ras_err_handler_data *data;
1170 int i = 0;
1171 int ret = 0;
1172
1173 if (!con || !con->eh_data || !bps || !count)
1174 return -EINVAL;
1175
1176 mutex_lock(&con->recovery_lock);
1177 data = con->eh_data;
1178 if (!data || data->count == 0) {
1179 *bps = NULL;
1180 goto out;
1181 }
1182
1183 *bps = kmalloc(sizeof(struct ras_badpage) * data->count, GFP_KERNEL);
1184 if (!*bps) {
1185 ret = -ENOMEM;
1186 goto out;
1187 }
1188
1189 for (; i < data->count; i++) {
1190 (*bps)[i] = (struct ras_badpage){
1191 .bp = data->bps[i].bp,
1192 .size = AMDGPU_GPU_PAGE_SIZE,
1193 .flags = 0,
1194 };
1195
1196 if (data->last_reserved <= i)
1197 (*bps)[i].flags = 1;
1198 else if (data->bps[i].bo == NULL)
1199 (*bps)[i].flags = 2;
1200 }
1201
1202 *count = data->count;
1203out:
1204 mutex_unlock(&con->recovery_lock);
1205 return ret;
1206}
1207
1208static void amdgpu_ras_do_recovery(struct work_struct *work)
1209{
1210 struct amdgpu_ras *ras =
1211 container_of(work, struct amdgpu_ras, recovery_work);
1212
1213 amdgpu_device_gpu_recover(ras->adev, 0);
1214 atomic_set(&ras->in_recovery, 0);
1215}
1216
1217static int amdgpu_ras_release_vram(struct amdgpu_device *adev,
1218 struct amdgpu_bo **bo_ptr)
1219{
1220 /* no need to free it actually. */
1221 amdgpu_bo_free_kernel(bo_ptr, NULL, NULL);
1222 return 0;
1223}
1224
1225/* reserve vram with size@offset */
1226static int amdgpu_ras_reserve_vram(struct amdgpu_device *adev,
1227 uint64_t offset, uint64_t size,
1228 struct amdgpu_bo **bo_ptr)
1229{
1230 struct ttm_operation_ctx ctx = { false, false };
1231 struct amdgpu_bo_param bp;
1232 int r = 0;
1233 int i;
1234 struct amdgpu_bo *bo;
1235
1236 if (bo_ptr)
1237 *bo_ptr = NULL;
1238 memset(&bp, 0, sizeof(bp));
1239 bp.size = size;
1240 bp.byte_align = PAGE_SIZE;
1241 bp.domain = AMDGPU_GEM_DOMAIN_VRAM;
1242 bp.flags = AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
1243 AMDGPU_GEM_CREATE_NO_CPU_ACCESS;
1244 bp.type = ttm_bo_type_kernel;
1245 bp.resv = NULL;
1246
1247 r = amdgpu_bo_create(adev, &bp, &bo);
1248 if (r)
1249 return -EINVAL;
1250
1251 r = amdgpu_bo_reserve(bo, false);
1252 if (r)
1253 goto error_reserve;
1254
1255 offset = ALIGN(offset, PAGE_SIZE);
1256 for (i = 0; i < bo->placement.num_placement; ++i) {
1257 bo->placements[i].fpfn = offset >> PAGE_SHIFT;
1258 bo->placements[i].lpfn = (offset + size) >> PAGE_SHIFT;
1259 }
1260
1261 ttm_bo_mem_put(&bo->tbo, &bo->tbo.mem);
1262 r = ttm_bo_mem_space(&bo->tbo, &bo->placement, &bo->tbo.mem, &ctx);
1263 if (r)
1264 goto error_pin;
1265
1266 r = amdgpu_bo_pin_restricted(bo,
1267 AMDGPU_GEM_DOMAIN_VRAM,
1268 offset,
1269 offset + size);
1270 if (r)
1271 goto error_pin;
1272
1273 if (bo_ptr)
1274 *bo_ptr = bo;
1275
1276 amdgpu_bo_unreserve(bo);
1277 return r;
1278
1279error_pin:
1280 amdgpu_bo_unreserve(bo);
1281error_reserve:
1282 amdgpu_bo_unref(&bo);
1283 return r;
1284}
1285
1286/* alloc/realloc bps array */
1287static int amdgpu_ras_realloc_eh_data_space(struct amdgpu_device *adev,
1288 struct ras_err_handler_data *data, int pages)
1289{
1290 unsigned int old_space = data->count + data->space_left;
1291 unsigned int new_space = old_space + pages;
1292 unsigned int align_space = ALIGN(new_space, 1024);
1293 void *tmp = kmalloc(align_space * sizeof(*data->bps), GFP_KERNEL);
1294
1295 if (!tmp)
1296 return -ENOMEM;
1297
1298 if (data->bps) {
1299 memcpy(tmp, data->bps,
1300 data->count * sizeof(*data->bps));
1301 kfree(data->bps);
1302 }
1303
1304 data->bps = tmp;
1305 data->space_left += align_space - old_space;
1306 return 0;
1307}
1308
1309/* it deal with vram only. */
1310int amdgpu_ras_add_bad_pages(struct amdgpu_device *adev,
1311 unsigned long *bps, int pages)
1312{
1313 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1314 struct ras_err_handler_data *data;
1315 int i = pages;
1316 int ret = 0;
1317
1318 if (!con || !con->eh_data || !bps || pages <= 0)
1319 return 0;
1320
1321 mutex_lock(&con->recovery_lock);
1322 data = con->eh_data;
1323 if (!data)
1324 goto out;
1325
1326 if (data->space_left <= pages)
1327 if (amdgpu_ras_realloc_eh_data_space(adev, data, pages)) {
1328 ret = -ENOMEM;
1329 goto out;
1330 }
1331
1332 while (i--)
1333 data->bps[data->count++].bp = bps[i];
1334
1335 data->space_left -= pages;
1336out:
1337 mutex_unlock(&con->recovery_lock);
1338
1339 return ret;
1340}
1341
1342/* called in gpu recovery/init */
1343int amdgpu_ras_reserve_bad_pages(struct amdgpu_device *adev)
1344{
1345 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1346 struct ras_err_handler_data *data;
1347 uint64_t bp;
1348 struct amdgpu_bo *bo;
1349 int i;
1350
1351 if (!con || !con->eh_data)
1352 return 0;
1353
1354 mutex_lock(&con->recovery_lock);
1355 data = con->eh_data;
1356 if (!data)
1357 goto out;
1358 /* reserve vram at driver post stage. */
1359 for (i = data->last_reserved; i < data->count; i++) {
1360 bp = data->bps[i].bp;
1361
1362 if (amdgpu_ras_reserve_vram(adev, bp << PAGE_SHIFT,
1363 PAGE_SIZE, &bo))
1364 DRM_ERROR("RAS ERROR: reserve vram %llx fail\n", bp);
1365
1366 data->bps[i].bo = bo;
1367 data->last_reserved = i + 1;
1368 }
1369out:
1370 mutex_unlock(&con->recovery_lock);
1371 return 0;
1372}
1373
1374/* called when driver unload */
1375static int amdgpu_ras_release_bad_pages(struct amdgpu_device *adev)
1376{
1377 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1378 struct ras_err_handler_data *data;
1379 struct amdgpu_bo *bo;
1380 int i;
1381
1382 if (!con || !con->eh_data)
1383 return 0;
1384
1385 mutex_lock(&con->recovery_lock);
1386 data = con->eh_data;
1387 if (!data)
1388 goto out;
1389
1390 for (i = data->last_reserved - 1; i >= 0; i--) {
1391 bo = data->bps[i].bo;
1392
1393 amdgpu_ras_release_vram(adev, &bo);
1394
1395 data->bps[i].bo = bo;
1396 data->last_reserved = i;
1397 }
1398out:
1399 mutex_unlock(&con->recovery_lock);
1400 return 0;
1401}
1402
1403static int amdgpu_ras_save_bad_pages(struct amdgpu_device *adev)
1404{
1405 /* TODO
1406 * write the array to eeprom when SMU disabled.
1407 */
1408 return 0;
1409}
1410
1411static int amdgpu_ras_load_bad_pages(struct amdgpu_device *adev)
1412{
1413 /* TODO
1414 * read the array to eeprom when SMU disabled.
1415 */
1416 return 0;
1417}
1418
1419static int amdgpu_ras_recovery_init(struct amdgpu_device *adev)
1420{
1421 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1422 struct ras_err_handler_data **data = &con->eh_data;
1423
1424 *data = kmalloc(sizeof(**data),
1425 GFP_KERNEL|__GFP_ZERO);
1426 if (!*data)
1427 return -ENOMEM;
1428
1429 mutex_init(&con->recovery_lock);
1430 INIT_WORK(&con->recovery_work, amdgpu_ras_do_recovery);
1431 atomic_set(&con->in_recovery, 0);
1432 con->adev = adev;
1433
1434 amdgpu_ras_load_bad_pages(adev);
1435 amdgpu_ras_reserve_bad_pages(adev);
1436
1437 return 0;
1438}
1439
1440static int amdgpu_ras_recovery_fini(struct amdgpu_device *adev)
1441{
1442 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1443 struct ras_err_handler_data *data = con->eh_data;
1444
1445 cancel_work_sync(&con->recovery_work);
1446 amdgpu_ras_save_bad_pages(adev);
1447 amdgpu_ras_release_bad_pages(adev);
1448
1449 mutex_lock(&con->recovery_lock);
1450 con->eh_data = NULL;
1451 kfree(data->bps);
1452 kfree(data);
1453 mutex_unlock(&con->recovery_lock);
1454
1455 return 0;
1456}
1457/* recovery end */
1458
1459/* return 0 if ras will reset gpu and repost.*/
1460int amdgpu_ras_request_reset_on_boot(struct amdgpu_device *adev,
1461 unsigned int block)
1462{
1463 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
1464
1465 if (!ras)
1466 return -EINVAL;
1467
1468 ras->flags |= AMDGPU_RAS_FLAG_INIT_NEED_RESET;
1469 return 0;
1470}
1471
1472/*
1473 * check hardware's ras ability which will be saved in hw_supported.
1474 * if hardware does not support ras, we can skip some ras initializtion and
1475 * forbid some ras operations from IP.
1476 * if software itself, say boot parameter, limit the ras ability. We still
1477 * need allow IP do some limited operations, like disable. In such case,
1478 * we have to initialize ras as normal. but need check if operation is
1479 * allowed or not in each function.
1480 */
1481static void amdgpu_ras_check_supported(struct amdgpu_device *adev,
1482 uint32_t *hw_supported, uint32_t *supported)
1483{
1484 *hw_supported = 0;
1485 *supported = 0;
1486
1487 if (amdgpu_sriov_vf(adev) ||
1488 adev->asic_type != CHIP_VEGA20)
1489 return;
1490
1491 if (adev->is_atom_fw &&
1492 (amdgpu_atomfirmware_mem_ecc_supported(adev) ||
1493 amdgpu_atomfirmware_sram_ecc_supported(adev)))
1494 *hw_supported = AMDGPU_RAS_BLOCK_MASK;
1495
1496 *supported = amdgpu_ras_enable == 0 ?
1497 0 : *hw_supported & amdgpu_ras_mask;
1498}
1499
1500int amdgpu_ras_init(struct amdgpu_device *adev)
1501{
1502 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1503
1504 if (con)
1505 return 0;
1506
1507 con = kmalloc(sizeof(struct amdgpu_ras) +
1508 sizeof(struct ras_manager) * AMDGPU_RAS_BLOCK_COUNT,
1509 GFP_KERNEL|__GFP_ZERO);
1510 if (!con)
1511 return -ENOMEM;
1512
1513 con->objs = (struct ras_manager *)(con + 1);
1514
1515 amdgpu_ras_set_context(adev, con);
1516
1517 amdgpu_ras_check_supported(adev, &con->hw_supported,
1518 &con->supported);
1519 if (!con->hw_supported) {
1520 amdgpu_ras_set_context(adev, NULL);
1521 kfree(con);
1522 return 0;
1523 }
1524
1525 con->features = 0;
1526 INIT_LIST_HEAD(&con->head);
1527 /* Might need get this flag from vbios. */
1528 con->flags = RAS_DEFAULT_FLAGS;
1529
1530 if (amdgpu_ras_recovery_init(adev))
1531 goto recovery_out;
1532
1533 amdgpu_ras_mask &= AMDGPU_RAS_BLOCK_MASK;
1534
1535 if (amdgpu_ras_fs_init(adev))
1536 goto fs_out;
1537
1538 /* ras init for each ras block */
1539 if (adev->umc.funcs->ras_init)
1540 adev->umc.funcs->ras_init(adev);
1541
1542 DRM_INFO("RAS INFO: ras initialized successfully, "
1543 "hardware ability[%x] ras_mask[%x]\n",
1544 con->hw_supported, con->supported);
1545 return 0;
1546fs_out:
1547 amdgpu_ras_recovery_fini(adev);
1548recovery_out:
1549 amdgpu_ras_set_context(adev, NULL);
1550 kfree(con);
1551
1552 return -EINVAL;
1553}
1554
1555/* do some init work after IP late init as dependence.
1556 * and it runs in resume/gpu reset/booting up cases.
1557 */
1558void amdgpu_ras_resume(struct amdgpu_device *adev)
1559{
1560 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1561 struct ras_manager *obj, *tmp;
1562
1563 if (!con)
1564 return;
1565
1566 if (con->flags & AMDGPU_RAS_FLAG_INIT_BY_VBIOS) {
1567 /* Set up all other IPs which are not implemented. There is a
1568 * tricky thing that IP's actual ras error type should be
1569 * MULTI_UNCORRECTABLE, but as driver does not handle it, so
1570 * ERROR_NONE make sense anyway.
1571 */
1572 amdgpu_ras_enable_all_features(adev, 1);
1573
1574 /* We enable ras on all hw_supported block, but as boot
1575 * parameter might disable some of them and one or more IP has
1576 * not implemented yet. So we disable them on behalf.
1577 */
1578 list_for_each_entry_safe(obj, tmp, &con->head, node) {
1579 if (!amdgpu_ras_is_supported(adev, obj->head.block)) {
1580 amdgpu_ras_feature_enable(adev, &obj->head, 0);
1581 /* there should be no any reference. */
1582 WARN_ON(alive_obj(obj));
1583 }
1584 }
1585 }
1586
1587 if (con->flags & AMDGPU_RAS_FLAG_INIT_NEED_RESET) {
1588 con->flags &= ~AMDGPU_RAS_FLAG_INIT_NEED_RESET;
1589 /* setup ras obj state as disabled.
1590 * for init_by_vbios case.
1591 * if we want to enable ras, just enable it in a normal way.
1592 * If we want do disable it, need setup ras obj as enabled,
1593 * then issue another TA disable cmd.
1594 * See feature_enable_on_boot
1595 */
1596 amdgpu_ras_disable_all_features(adev, 1);
1597 amdgpu_ras_reset_gpu(adev, 0);
1598 }
1599}
1600
1601void amdgpu_ras_suspend(struct amdgpu_device *adev)
1602{
1603 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1604
1605 if (!con)
1606 return;
1607
1608 amdgpu_ras_disable_all_features(adev, 0);
1609 /* Make sure all ras objects are disabled. */
1610 if (con->features)
1611 amdgpu_ras_disable_all_features(adev, 1);
1612}
1613
1614/* do some fini work before IP fini as dependence */
1615int amdgpu_ras_pre_fini(struct amdgpu_device *adev)
1616{
1617 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1618
1619 if (!con)
1620 return 0;
1621
1622 /* Need disable ras on all IPs here before ip [hw/sw]fini */
1623 amdgpu_ras_disable_all_features(adev, 0);
1624 amdgpu_ras_recovery_fini(adev);
1625 return 0;
1626}
1627
1628int amdgpu_ras_fini(struct amdgpu_device *adev)
1629{
1630 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1631
1632 if (!con)
1633 return 0;
1634
1635 amdgpu_ras_fs_fini(adev);
1636 amdgpu_ras_interrupt_remove_all(adev);
1637
1638 WARN(con->features, "Feature mask is not cleared");
1639
1640 if (con->features)
1641 amdgpu_ras_disable_all_features(adev, 1);
1642
1643 amdgpu_ras_set_context(adev, NULL);
1644 kfree(con);
1645
1646 return 0;
1647}
1/*
2 * Copyright 2018 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 *
23 */
24#include <linux/debugfs.h>
25#include <linux/list.h>
26#include <linux/module.h>
27#include <linux/uaccess.h>
28#include <linux/reboot.h>
29#include <linux/syscalls.h>
30#include <linux/pm_runtime.h>
31
32#include "amdgpu.h"
33#include "amdgpu_ras.h"
34#include "amdgpu_atomfirmware.h"
35#include "amdgpu_xgmi.h"
36#include "ivsrcid/nbio/irqsrcs_nbif_7_4.h"
37#include "atom.h"
38
39static const char *RAS_FS_NAME = "ras";
40
41const char *ras_error_string[] = {
42 "none",
43 "parity",
44 "single_correctable",
45 "multi_uncorrectable",
46 "poison",
47};
48
49const char *ras_block_string[] = {
50 "umc",
51 "sdma",
52 "gfx",
53 "mmhub",
54 "athub",
55 "pcie_bif",
56 "hdp",
57 "xgmi_wafl",
58 "df",
59 "smn",
60 "sem",
61 "mp0",
62 "mp1",
63 "fuse",
64};
65
66#define ras_err_str(i) (ras_error_string[ffs(i)])
67#define ras_block_str(i) (ras_block_string[i])
68
69#define RAS_DEFAULT_FLAGS (AMDGPU_RAS_FLAG_INIT_BY_VBIOS)
70
71/* inject address is 52 bits */
72#define RAS_UMC_INJECT_ADDR_LIMIT (0x1ULL << 52)
73
74/* typical ECC bad page rate(1 bad page per 100MB VRAM) */
75#define RAS_BAD_PAGE_RATE (100 * 1024 * 1024ULL)
76
77enum amdgpu_ras_retire_page_reservation {
78 AMDGPU_RAS_RETIRE_PAGE_RESERVED,
79 AMDGPU_RAS_RETIRE_PAGE_PENDING,
80 AMDGPU_RAS_RETIRE_PAGE_FAULT,
81};
82
83atomic_t amdgpu_ras_in_intr = ATOMIC_INIT(0);
84
85static bool amdgpu_ras_check_bad_page_unlock(struct amdgpu_ras *con,
86 uint64_t addr);
87static bool amdgpu_ras_check_bad_page(struct amdgpu_device *adev,
88 uint64_t addr);
89
90void amdgpu_ras_set_error_query_ready(struct amdgpu_device *adev, bool ready)
91{
92 if (adev && amdgpu_ras_get_context(adev))
93 amdgpu_ras_get_context(adev)->error_query_ready = ready;
94}
95
96static bool amdgpu_ras_get_error_query_ready(struct amdgpu_device *adev)
97{
98 if (adev && amdgpu_ras_get_context(adev))
99 return amdgpu_ras_get_context(adev)->error_query_ready;
100
101 return false;
102}
103
104static int amdgpu_reserve_page_direct(struct amdgpu_device *adev, uint64_t address)
105{
106 struct ras_err_data err_data = {0, 0, 0, NULL};
107 struct eeprom_table_record err_rec;
108
109 if ((address >= adev->gmc.mc_vram_size) ||
110 (address >= RAS_UMC_INJECT_ADDR_LIMIT)) {
111 dev_warn(adev->dev,
112 "RAS WARN: input address 0x%llx is invalid.\n",
113 address);
114 return -EINVAL;
115 }
116
117 if (amdgpu_ras_check_bad_page(adev, address)) {
118 dev_warn(adev->dev,
119 "RAS WARN: 0x%llx has already been marked as bad page!\n",
120 address);
121 return 0;
122 }
123
124 memset(&err_rec, 0x0, sizeof(struct eeprom_table_record));
125
126 err_rec.address = address;
127 err_rec.retired_page = address >> AMDGPU_GPU_PAGE_SHIFT;
128 err_rec.ts = (uint64_t)ktime_get_real_seconds();
129 err_rec.err_type = AMDGPU_RAS_EEPROM_ERR_NON_RECOVERABLE;
130
131 err_data.err_addr = &err_rec;
132 err_data.err_addr_cnt = 1;
133
134 if (amdgpu_bad_page_threshold != 0) {
135 amdgpu_ras_add_bad_pages(adev, err_data.err_addr,
136 err_data.err_addr_cnt);
137 amdgpu_ras_save_bad_pages(adev);
138 }
139
140 dev_warn(adev->dev, "WARNING: THIS IS ONLY FOR TEST PURPOSES AND WILL CORRUPT RAS EEPROM\n");
141 dev_warn(adev->dev, "Clear EEPROM:\n");
142 dev_warn(adev->dev, " echo 1 > /sys/kernel/debug/dri/0/ras/ras_eeprom_reset\n");
143
144 return 0;
145}
146
147static ssize_t amdgpu_ras_debugfs_read(struct file *f, char __user *buf,
148 size_t size, loff_t *pos)
149{
150 struct ras_manager *obj = (struct ras_manager *)file_inode(f)->i_private;
151 struct ras_query_if info = {
152 .head = obj->head,
153 };
154 ssize_t s;
155 char val[128];
156
157 if (amdgpu_ras_query_error_status(obj->adev, &info))
158 return -EINVAL;
159
160 s = snprintf(val, sizeof(val), "%s: %lu\n%s: %lu\n",
161 "ue", info.ue_count,
162 "ce", info.ce_count);
163 if (*pos >= s)
164 return 0;
165
166 s -= *pos;
167 s = min_t(u64, s, size);
168
169
170 if (copy_to_user(buf, &val[*pos], s))
171 return -EINVAL;
172
173 *pos += s;
174
175 return s;
176}
177
178static const struct file_operations amdgpu_ras_debugfs_ops = {
179 .owner = THIS_MODULE,
180 .read = amdgpu_ras_debugfs_read,
181 .write = NULL,
182 .llseek = default_llseek
183};
184
185static int amdgpu_ras_find_block_id_by_name(const char *name, int *block_id)
186{
187 int i;
188
189 for (i = 0; i < ARRAY_SIZE(ras_block_string); i++) {
190 *block_id = i;
191 if (strcmp(name, ras_block_str(i)) == 0)
192 return 0;
193 }
194 return -EINVAL;
195}
196
197static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f,
198 const char __user *buf, size_t size,
199 loff_t *pos, struct ras_debug_if *data)
200{
201 ssize_t s = min_t(u64, 64, size);
202 char str[65];
203 char block_name[33];
204 char err[9] = "ue";
205 int op = -1;
206 int block_id;
207 uint32_t sub_block;
208 u64 address, value;
209
210 if (*pos)
211 return -EINVAL;
212 *pos = size;
213
214 memset(str, 0, sizeof(str));
215 memset(data, 0, sizeof(*data));
216
217 if (copy_from_user(str, buf, s))
218 return -EINVAL;
219
220 if (sscanf(str, "disable %32s", block_name) == 1)
221 op = 0;
222 else if (sscanf(str, "enable %32s %8s", block_name, err) == 2)
223 op = 1;
224 else if (sscanf(str, "inject %32s %8s", block_name, err) == 2)
225 op = 2;
226 else if (strstr(str, "retire_page") != NULL)
227 op = 3;
228 else if (str[0] && str[1] && str[2] && str[3])
229 /* ascii string, but commands are not matched. */
230 return -EINVAL;
231
232 if (op != -1) {
233 if (op == 3) {
234 if (sscanf(str, "%*s 0x%llx", &address) != 1 &&
235 sscanf(str, "%*s %llu", &address) != 1)
236 return -EINVAL;
237
238 data->op = op;
239 data->inject.address = address;
240
241 return 0;
242 }
243
244 if (amdgpu_ras_find_block_id_by_name(block_name, &block_id))
245 return -EINVAL;
246
247 data->head.block = block_id;
248 /* only ue and ce errors are supported */
249 if (!memcmp("ue", err, 2))
250 data->head.type = AMDGPU_RAS_ERROR__MULTI_UNCORRECTABLE;
251 else if (!memcmp("ce", err, 2))
252 data->head.type = AMDGPU_RAS_ERROR__SINGLE_CORRECTABLE;
253 else
254 return -EINVAL;
255
256 data->op = op;
257
258 if (op == 2) {
259 if (sscanf(str, "%*s %*s %*s 0x%x 0x%llx 0x%llx",
260 &sub_block, &address, &value) != 3 &&
261 sscanf(str, "%*s %*s %*s %u %llu %llu",
262 &sub_block, &address, &value) != 3)
263 return -EINVAL;
264 data->head.sub_block_index = sub_block;
265 data->inject.address = address;
266 data->inject.value = value;
267 }
268 } else {
269 if (size < sizeof(*data))
270 return -EINVAL;
271
272 if (copy_from_user(data, buf, sizeof(*data)))
273 return -EINVAL;
274 }
275
276 return 0;
277}
278
279/**
280 * DOC: AMDGPU RAS debugfs control interface
281 *
282 * The control interface accepts struct ras_debug_if which has two members.
283 *
284 * First member: ras_debug_if::head or ras_debug_if::inject.
285 *
286 * head is used to indicate which IP block will be under control.
287 *
288 * head has four members, they are block, type, sub_block_index, name.
289 * block: which IP will be under control.
290 * type: what kind of error will be enabled/disabled/injected.
291 * sub_block_index: some IPs have subcomponets. say, GFX, sDMA.
292 * name: the name of IP.
293 *
294 * inject has two more members than head, they are address, value.
295 * As their names indicate, inject operation will write the
296 * value to the address.
297 *
298 * The second member: struct ras_debug_if::op.
299 * It has three kinds of operations.
300 *
301 * - 0: disable RAS on the block. Take ::head as its data.
302 * - 1: enable RAS on the block. Take ::head as its data.
303 * - 2: inject errors on the block. Take ::inject as its data.
304 *
305 * How to use the interface?
306 *
307 * In a program
308 *
309 * Copy the struct ras_debug_if in your code and initialize it.
310 * Write the struct to the control interface.
311 *
312 * From shell
313 *
314 * .. code-block:: bash
315 *
316 * echo "disable <block>" > /sys/kernel/debug/dri/<N>/ras/ras_ctrl
317 * echo "enable <block> <error>" > /sys/kernel/debug/dri/<N>/ras/ras_ctrl
318 * echo "inject <block> <error> <sub-block> <address> <value> > /sys/kernel/debug/dri/<N>/ras/ras_ctrl
319 *
320 * Where N, is the card which you want to affect.
321 *
322 * "disable" requires only the block.
323 * "enable" requires the block and error type.
324 * "inject" requires the block, error type, address, and value.
325 *
326 * The block is one of: umc, sdma, gfx, etc.
327 * see ras_block_string[] for details
328 *
329 * The error type is one of: ue, ce, where,
330 * ue is multi-uncorrectable
331 * ce is single-correctable
332 *
333 * The sub-block is a the sub-block index, pass 0 if there is no sub-block.
334 * The address and value are hexadecimal numbers, leading 0x is optional.
335 *
336 * For instance,
337 *
338 * .. code-block:: bash
339 *
340 * echo inject umc ue 0x0 0x0 0x0 > /sys/kernel/debug/dri/0/ras/ras_ctrl
341 * echo inject umc ce 0 0 0 > /sys/kernel/debug/dri/0/ras/ras_ctrl
342 * echo disable umc > /sys/kernel/debug/dri/0/ras/ras_ctrl
343 *
344 * How to check the result of the operation?
345 *
346 * To check disable/enable, see "ras" features at,
347 * /sys/class/drm/card[0/1/2...]/device/ras/features
348 *
349 * To check inject, see the corresponding error count at,
350 * /sys/class/drm/card[0/1/2...]/device/ras/[gfx|sdma|umc|...]_err_count
351 *
352 * .. note::
353 * Operations are only allowed on blocks which are supported.
354 * Check the "ras" mask at /sys/module/amdgpu/parameters/ras_mask
355 * to see which blocks support RAS on a particular asic.
356 *
357 */
358static ssize_t amdgpu_ras_debugfs_ctrl_write(struct file *f, const char __user *buf,
359 size_t size, loff_t *pos)
360{
361 struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
362 struct ras_debug_if data;
363 int ret = 0;
364
365 if (!amdgpu_ras_get_error_query_ready(adev)) {
366 dev_warn(adev->dev, "RAS WARN: error injection "
367 "currently inaccessible\n");
368 return size;
369 }
370
371 ret = amdgpu_ras_debugfs_ctrl_parse_data(f, buf, size, pos, &data);
372 if (ret)
373 return -EINVAL;
374
375 if (data.op == 3) {
376 ret = amdgpu_reserve_page_direct(adev, data.inject.address);
377 if (!ret)
378 return size;
379 else
380 return ret;
381 }
382
383 if (!amdgpu_ras_is_supported(adev, data.head.block))
384 return -EINVAL;
385
386 switch (data.op) {
387 case 0:
388 ret = amdgpu_ras_feature_enable(adev, &data.head, 0);
389 break;
390 case 1:
391 ret = amdgpu_ras_feature_enable(adev, &data.head, 1);
392 break;
393 case 2:
394 if ((data.inject.address >= adev->gmc.mc_vram_size) ||
395 (data.inject.address >= RAS_UMC_INJECT_ADDR_LIMIT)) {
396 dev_warn(adev->dev, "RAS WARN: input address "
397 "0x%llx is invalid.",
398 data.inject.address);
399 ret = -EINVAL;
400 break;
401 }
402
403 /* umc ce/ue error injection for a bad page is not allowed */
404 if ((data.head.block == AMDGPU_RAS_BLOCK__UMC) &&
405 amdgpu_ras_check_bad_page(adev, data.inject.address)) {
406 dev_warn(adev->dev, "RAS WARN: 0x%llx has been marked "
407 "as bad before error injection!\n",
408 data.inject.address);
409 break;
410 }
411
412 /* data.inject.address is offset instead of absolute gpu address */
413 ret = amdgpu_ras_error_inject(adev, &data.inject);
414 break;
415 default:
416 ret = -EINVAL;
417 break;
418 }
419
420 if (ret)
421 return -EINVAL;
422
423 return size;
424}
425
426/**
427 * DOC: AMDGPU RAS debugfs EEPROM table reset interface
428 *
429 * Some boards contain an EEPROM which is used to persistently store a list of
430 * bad pages which experiences ECC errors in vram. This interface provides
431 * a way to reset the EEPROM, e.g., after testing error injection.
432 *
433 * Usage:
434 *
435 * .. code-block:: bash
436 *
437 * echo 1 > ../ras/ras_eeprom_reset
438 *
439 * will reset EEPROM table to 0 entries.
440 *
441 */
442static ssize_t amdgpu_ras_debugfs_eeprom_write(struct file *f, const char __user *buf,
443 size_t size, loff_t *pos)
444{
445 struct amdgpu_device *adev =
446 (struct amdgpu_device *)file_inode(f)->i_private;
447 int ret;
448
449 ret = amdgpu_ras_eeprom_reset_table(
450 &(amdgpu_ras_get_context(adev)->eeprom_control));
451
452 if (ret == 1) {
453 amdgpu_ras_get_context(adev)->flags = RAS_DEFAULT_FLAGS;
454 return size;
455 } else {
456 return -EIO;
457 }
458}
459
460static const struct file_operations amdgpu_ras_debugfs_ctrl_ops = {
461 .owner = THIS_MODULE,
462 .read = NULL,
463 .write = amdgpu_ras_debugfs_ctrl_write,
464 .llseek = default_llseek
465};
466
467static const struct file_operations amdgpu_ras_debugfs_eeprom_ops = {
468 .owner = THIS_MODULE,
469 .read = NULL,
470 .write = amdgpu_ras_debugfs_eeprom_write,
471 .llseek = default_llseek
472};
473
474/**
475 * DOC: AMDGPU RAS sysfs Error Count Interface
476 *
477 * It allows the user to read the error count for each IP block on the gpu through
478 * /sys/class/drm/card[0/1/2...]/device/ras/[gfx/sdma/...]_err_count
479 *
480 * It outputs the multiple lines which report the uncorrected (ue) and corrected
481 * (ce) error counts.
482 *
483 * The format of one line is below,
484 *
485 * [ce|ue]: count
486 *
487 * Example:
488 *
489 * .. code-block:: bash
490 *
491 * ue: 0
492 * ce: 1
493 *
494 */
495static ssize_t amdgpu_ras_sysfs_read(struct device *dev,
496 struct device_attribute *attr, char *buf)
497{
498 struct ras_manager *obj = container_of(attr, struct ras_manager, sysfs_attr);
499 struct ras_query_if info = {
500 .head = obj->head,
501 };
502
503 if (!amdgpu_ras_get_error_query_ready(obj->adev))
504 return sysfs_emit(buf, "Query currently inaccessible\n");
505
506 if (amdgpu_ras_query_error_status(obj->adev, &info))
507 return -EINVAL;
508
509
510 if (obj->adev->asic_type == CHIP_ALDEBARAN) {
511 if (amdgpu_ras_reset_error_status(obj->adev, info.head.block))
512 DRM_WARN("Failed to reset error counter and error status");
513 }
514
515 return sysfs_emit(buf, "%s: %lu\n%s: %lu\n", "ue", info.ue_count,
516 "ce", info.ce_count);
517}
518
519/* obj begin */
520
521#define get_obj(obj) do { (obj)->use++; } while (0)
522#define alive_obj(obj) ((obj)->use)
523
524static inline void put_obj(struct ras_manager *obj)
525{
526 if (obj && (--obj->use == 0))
527 list_del(&obj->node);
528 if (obj && (obj->use < 0))
529 DRM_ERROR("RAS ERROR: Unbalance obj(%s) use\n", obj->head.name);
530}
531
532/* make one obj and return it. */
533static struct ras_manager *amdgpu_ras_create_obj(struct amdgpu_device *adev,
534 struct ras_common_if *head)
535{
536 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
537 struct ras_manager *obj;
538
539 if (!adev->ras_enabled || !con)
540 return NULL;
541
542 if (head->block >= AMDGPU_RAS_BLOCK_COUNT)
543 return NULL;
544
545 obj = &con->objs[head->block];
546 /* already exist. return obj? */
547 if (alive_obj(obj))
548 return NULL;
549
550 obj->head = *head;
551 obj->adev = adev;
552 list_add(&obj->node, &con->head);
553 get_obj(obj);
554
555 return obj;
556}
557
558/* return an obj equal to head, or the first when head is NULL */
559struct ras_manager *amdgpu_ras_find_obj(struct amdgpu_device *adev,
560 struct ras_common_if *head)
561{
562 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
563 struct ras_manager *obj;
564 int i;
565
566 if (!adev->ras_enabled || !con)
567 return NULL;
568
569 if (head) {
570 if (head->block >= AMDGPU_RAS_BLOCK_COUNT)
571 return NULL;
572
573 obj = &con->objs[head->block];
574
575 if (alive_obj(obj)) {
576 WARN_ON(head->block != obj->head.block);
577 return obj;
578 }
579 } else {
580 for (i = 0; i < AMDGPU_RAS_BLOCK_COUNT; i++) {
581 obj = &con->objs[i];
582 if (alive_obj(obj)) {
583 WARN_ON(i != obj->head.block);
584 return obj;
585 }
586 }
587 }
588
589 return NULL;
590}
591/* obj end */
592
593/* feature ctl begin */
594static int amdgpu_ras_is_feature_allowed(struct amdgpu_device *adev,
595 struct ras_common_if *head)
596{
597 return adev->ras_hw_enabled & BIT(head->block);
598}
599
600static int amdgpu_ras_is_feature_enabled(struct amdgpu_device *adev,
601 struct ras_common_if *head)
602{
603 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
604
605 return con->features & BIT(head->block);
606}
607
608/*
609 * if obj is not created, then create one.
610 * set feature enable flag.
611 */
612static int __amdgpu_ras_feature_enable(struct amdgpu_device *adev,
613 struct ras_common_if *head, int enable)
614{
615 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
616 struct ras_manager *obj = amdgpu_ras_find_obj(adev, head);
617
618 /* If hardware does not support ras, then do not create obj.
619 * But if hardware support ras, we can create the obj.
620 * Ras framework checks con->hw_supported to see if it need do
621 * corresponding initialization.
622 * IP checks con->support to see if it need disable ras.
623 */
624 if (!amdgpu_ras_is_feature_allowed(adev, head))
625 return 0;
626 if (!(!!enable ^ !!amdgpu_ras_is_feature_enabled(adev, head)))
627 return 0;
628
629 if (enable) {
630 if (!obj) {
631 obj = amdgpu_ras_create_obj(adev, head);
632 if (!obj)
633 return -EINVAL;
634 } else {
635 /* In case we create obj somewhere else */
636 get_obj(obj);
637 }
638 con->features |= BIT(head->block);
639 } else {
640 if (obj && amdgpu_ras_is_feature_enabled(adev, head)) {
641 con->features &= ~BIT(head->block);
642 put_obj(obj);
643 }
644 }
645
646 return 0;
647}
648
649/* wrapper of psp_ras_enable_features */
650int amdgpu_ras_feature_enable(struct amdgpu_device *adev,
651 struct ras_common_if *head, bool enable)
652{
653 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
654 union ta_ras_cmd_input *info;
655 int ret;
656
657 if (!con)
658 return -EINVAL;
659
660 info = kzalloc(sizeof(union ta_ras_cmd_input), GFP_KERNEL);
661 if (!info)
662 return -ENOMEM;
663
664 if (!enable) {
665 info->disable_features = (struct ta_ras_disable_features_input) {
666 .block_id = amdgpu_ras_block_to_ta(head->block),
667 .error_type = amdgpu_ras_error_to_ta(head->type),
668 };
669 } else {
670 info->enable_features = (struct ta_ras_enable_features_input) {
671 .block_id = amdgpu_ras_block_to_ta(head->block),
672 .error_type = amdgpu_ras_error_to_ta(head->type),
673 };
674 }
675
676 /* Do not enable if it is not allowed. */
677 WARN_ON(enable && !amdgpu_ras_is_feature_allowed(adev, head));
678 /* Are we alerady in that state we are going to set? */
679 if (!(!!enable ^ !!amdgpu_ras_is_feature_enabled(adev, head))) {
680 ret = 0;
681 goto out;
682 }
683
684 if (!amdgpu_ras_intr_triggered()) {
685 ret = psp_ras_enable_features(&adev->psp, info, enable);
686 if (ret) {
687 dev_err(adev->dev, "ras %s %s failed %d\n",
688 enable ? "enable":"disable",
689 ras_block_str(head->block),
690 ret);
691 goto out;
692 }
693 }
694
695 /* setup the obj */
696 __amdgpu_ras_feature_enable(adev, head, enable);
697 ret = 0;
698out:
699 kfree(info);
700 return ret;
701}
702
703/* Only used in device probe stage and called only once. */
704int amdgpu_ras_feature_enable_on_boot(struct amdgpu_device *adev,
705 struct ras_common_if *head, bool enable)
706{
707 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
708 int ret;
709
710 if (!con)
711 return -EINVAL;
712
713 if (con->flags & AMDGPU_RAS_FLAG_INIT_BY_VBIOS) {
714 if (enable) {
715 /* There is no harm to issue a ras TA cmd regardless of
716 * the currecnt ras state.
717 * If current state == target state, it will do nothing
718 * But sometimes it requests driver to reset and repost
719 * with error code -EAGAIN.
720 */
721 ret = amdgpu_ras_feature_enable(adev, head, 1);
722 /* With old ras TA, we might fail to enable ras.
723 * Log it and just setup the object.
724 * TODO need remove this WA in the future.
725 */
726 if (ret == -EINVAL) {
727 ret = __amdgpu_ras_feature_enable(adev, head, 1);
728 if (!ret)
729 dev_info(adev->dev,
730 "RAS INFO: %s setup object\n",
731 ras_block_str(head->block));
732 }
733 } else {
734 /* setup the object then issue a ras TA disable cmd.*/
735 ret = __amdgpu_ras_feature_enable(adev, head, 1);
736 if (ret)
737 return ret;
738
739 /* gfx block ras dsiable cmd must send to ras-ta */
740 if (head->block == AMDGPU_RAS_BLOCK__GFX)
741 con->features |= BIT(head->block);
742
743 ret = amdgpu_ras_feature_enable(adev, head, 0);
744
745 /* clean gfx block ras features flag */
746 if (adev->ras_enabled && head->block == AMDGPU_RAS_BLOCK__GFX)
747 con->features &= ~BIT(head->block);
748 }
749 } else
750 ret = amdgpu_ras_feature_enable(adev, head, enable);
751
752 return ret;
753}
754
755static int amdgpu_ras_disable_all_features(struct amdgpu_device *adev,
756 bool bypass)
757{
758 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
759 struct ras_manager *obj, *tmp;
760
761 list_for_each_entry_safe(obj, tmp, &con->head, node) {
762 /* bypass psp.
763 * aka just release the obj and corresponding flags
764 */
765 if (bypass) {
766 if (__amdgpu_ras_feature_enable(adev, &obj->head, 0))
767 break;
768 } else {
769 if (amdgpu_ras_feature_enable(adev, &obj->head, 0))
770 break;
771 }
772 }
773
774 return con->features;
775}
776
777static int amdgpu_ras_enable_all_features(struct amdgpu_device *adev,
778 bool bypass)
779{
780 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
781 int ras_block_count = AMDGPU_RAS_BLOCK_COUNT;
782 int i;
783 const enum amdgpu_ras_error_type default_ras_type =
784 AMDGPU_RAS_ERROR__NONE;
785
786 for (i = 0; i < ras_block_count; i++) {
787 struct ras_common_if head = {
788 .block = i,
789 .type = default_ras_type,
790 .sub_block_index = 0,
791 };
792 strcpy(head.name, ras_block_str(i));
793 if (bypass) {
794 /*
795 * bypass psp. vbios enable ras for us.
796 * so just create the obj
797 */
798 if (__amdgpu_ras_feature_enable(adev, &head, 1))
799 break;
800 } else {
801 if (amdgpu_ras_feature_enable(adev, &head, 1))
802 break;
803 }
804 }
805
806 return con->features;
807}
808/* feature ctl end */
809
810/* query/inject/cure begin */
811int amdgpu_ras_query_error_status(struct amdgpu_device *adev,
812 struct ras_query_if *info)
813{
814 struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head);
815 struct ras_err_data err_data = {0, 0, 0, NULL};
816 int i;
817
818 if (!obj)
819 return -EINVAL;
820
821 switch (info->head.block) {
822 case AMDGPU_RAS_BLOCK__UMC:
823 if (adev->umc.ras_funcs &&
824 adev->umc.ras_funcs->query_ras_error_count)
825 adev->umc.ras_funcs->query_ras_error_count(adev, &err_data);
826 /* umc query_ras_error_address is also responsible for clearing
827 * error status
828 */
829 if (adev->umc.ras_funcs &&
830 adev->umc.ras_funcs->query_ras_error_address)
831 adev->umc.ras_funcs->query_ras_error_address(adev, &err_data);
832 break;
833 case AMDGPU_RAS_BLOCK__SDMA:
834 if (adev->sdma.funcs->query_ras_error_count) {
835 for (i = 0; i < adev->sdma.num_instances; i++)
836 adev->sdma.funcs->query_ras_error_count(adev, i,
837 &err_data);
838 }
839 break;
840 case AMDGPU_RAS_BLOCK__GFX:
841 if (adev->gfx.ras_funcs &&
842 adev->gfx.ras_funcs->query_ras_error_count)
843 adev->gfx.ras_funcs->query_ras_error_count(adev, &err_data);
844
845 if (adev->gfx.ras_funcs &&
846 adev->gfx.ras_funcs->query_ras_error_status)
847 adev->gfx.ras_funcs->query_ras_error_status(adev);
848 break;
849 case AMDGPU_RAS_BLOCK__MMHUB:
850 if (adev->mmhub.ras_funcs &&
851 adev->mmhub.ras_funcs->query_ras_error_count)
852 adev->mmhub.ras_funcs->query_ras_error_count(adev, &err_data);
853
854 if (adev->mmhub.ras_funcs &&
855 adev->mmhub.ras_funcs->query_ras_error_status)
856 adev->mmhub.ras_funcs->query_ras_error_status(adev);
857 break;
858 case AMDGPU_RAS_BLOCK__PCIE_BIF:
859 if (adev->nbio.ras_funcs &&
860 adev->nbio.ras_funcs->query_ras_error_count)
861 adev->nbio.ras_funcs->query_ras_error_count(adev, &err_data);
862 break;
863 case AMDGPU_RAS_BLOCK__XGMI_WAFL:
864 if (adev->gmc.xgmi.ras_funcs &&
865 adev->gmc.xgmi.ras_funcs->query_ras_error_count)
866 adev->gmc.xgmi.ras_funcs->query_ras_error_count(adev, &err_data);
867 break;
868 case AMDGPU_RAS_BLOCK__HDP:
869 if (adev->hdp.ras_funcs &&
870 adev->hdp.ras_funcs->query_ras_error_count)
871 adev->hdp.ras_funcs->query_ras_error_count(adev, &err_data);
872 break;
873 default:
874 break;
875 }
876
877 obj->err_data.ue_count += err_data.ue_count;
878 obj->err_data.ce_count += err_data.ce_count;
879
880 info->ue_count = obj->err_data.ue_count;
881 info->ce_count = obj->err_data.ce_count;
882
883 if (err_data.ce_count) {
884 if (adev->smuio.funcs &&
885 adev->smuio.funcs->get_socket_id &&
886 adev->smuio.funcs->get_die_id) {
887 dev_info(adev->dev, "socket: %d, die: %d "
888 "%ld correctable hardware errors "
889 "detected in %s block, no user "
890 "action is needed.\n",
891 adev->smuio.funcs->get_socket_id(adev),
892 adev->smuio.funcs->get_die_id(adev),
893 obj->err_data.ce_count,
894 ras_block_str(info->head.block));
895 } else {
896 dev_info(adev->dev, "%ld correctable hardware errors "
897 "detected in %s block, no user "
898 "action is needed.\n",
899 obj->err_data.ce_count,
900 ras_block_str(info->head.block));
901 }
902 }
903 if (err_data.ue_count) {
904 if (adev->smuio.funcs &&
905 adev->smuio.funcs->get_socket_id &&
906 adev->smuio.funcs->get_die_id) {
907 dev_info(adev->dev, "socket: %d, die: %d "
908 "%ld uncorrectable hardware errors "
909 "detected in %s block\n",
910 adev->smuio.funcs->get_socket_id(adev),
911 adev->smuio.funcs->get_die_id(adev),
912 obj->err_data.ue_count,
913 ras_block_str(info->head.block));
914 } else {
915 dev_info(adev->dev, "%ld uncorrectable hardware errors "
916 "detected in %s block\n",
917 obj->err_data.ue_count,
918 ras_block_str(info->head.block));
919 }
920 }
921
922 return 0;
923}
924
925int amdgpu_ras_reset_error_status(struct amdgpu_device *adev,
926 enum amdgpu_ras_block block)
927{
928 if (!amdgpu_ras_is_supported(adev, block))
929 return -EINVAL;
930
931 switch (block) {
932 case AMDGPU_RAS_BLOCK__GFX:
933 if (adev->gfx.ras_funcs &&
934 adev->gfx.ras_funcs->reset_ras_error_count)
935 adev->gfx.ras_funcs->reset_ras_error_count(adev);
936
937 if (adev->gfx.ras_funcs &&
938 adev->gfx.ras_funcs->reset_ras_error_status)
939 adev->gfx.ras_funcs->reset_ras_error_status(adev);
940 break;
941 case AMDGPU_RAS_BLOCK__MMHUB:
942 if (adev->mmhub.ras_funcs &&
943 adev->mmhub.ras_funcs->reset_ras_error_count)
944 adev->mmhub.ras_funcs->reset_ras_error_count(adev);
945
946 if (adev->mmhub.ras_funcs &&
947 adev->mmhub.ras_funcs->reset_ras_error_status)
948 adev->mmhub.ras_funcs->reset_ras_error_status(adev);
949 break;
950 case AMDGPU_RAS_BLOCK__SDMA:
951 if (adev->sdma.funcs->reset_ras_error_count)
952 adev->sdma.funcs->reset_ras_error_count(adev);
953 break;
954 case AMDGPU_RAS_BLOCK__HDP:
955 if (adev->hdp.ras_funcs &&
956 adev->hdp.ras_funcs->reset_ras_error_count)
957 adev->hdp.ras_funcs->reset_ras_error_count(adev);
958 break;
959 default:
960 break;
961 }
962
963 return 0;
964}
965
966/* Trigger XGMI/WAFL error */
967static int amdgpu_ras_error_inject_xgmi(struct amdgpu_device *adev,
968 struct ta_ras_trigger_error_input *block_info)
969{
970 int ret;
971
972 if (amdgpu_dpm_set_df_cstate(adev, DF_CSTATE_DISALLOW))
973 dev_warn(adev->dev, "Failed to disallow df cstate");
974
975 if (amdgpu_dpm_allow_xgmi_power_down(adev, false))
976 dev_warn(adev->dev, "Failed to disallow XGMI power down");
977
978 ret = psp_ras_trigger_error(&adev->psp, block_info);
979
980 if (amdgpu_ras_intr_triggered())
981 return ret;
982
983 if (amdgpu_dpm_allow_xgmi_power_down(adev, true))
984 dev_warn(adev->dev, "Failed to allow XGMI power down");
985
986 if (amdgpu_dpm_set_df_cstate(adev, DF_CSTATE_ALLOW))
987 dev_warn(adev->dev, "Failed to allow df cstate");
988
989 return ret;
990}
991
992/* wrapper of psp_ras_trigger_error */
993int amdgpu_ras_error_inject(struct amdgpu_device *adev,
994 struct ras_inject_if *info)
995{
996 struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head);
997 struct ta_ras_trigger_error_input block_info = {
998 .block_id = amdgpu_ras_block_to_ta(info->head.block),
999 .inject_error_type = amdgpu_ras_error_to_ta(info->head.type),
1000 .sub_block_index = info->head.sub_block_index,
1001 .address = info->address,
1002 .value = info->value,
1003 };
1004 int ret = 0;
1005
1006 if (!obj)
1007 return -EINVAL;
1008
1009 /* Calculate XGMI relative offset */
1010 if (adev->gmc.xgmi.num_physical_nodes > 1) {
1011 block_info.address =
1012 amdgpu_xgmi_get_relative_phy_addr(adev,
1013 block_info.address);
1014 }
1015
1016 switch (info->head.block) {
1017 case AMDGPU_RAS_BLOCK__GFX:
1018 if (adev->gfx.ras_funcs &&
1019 adev->gfx.ras_funcs->ras_error_inject)
1020 ret = adev->gfx.ras_funcs->ras_error_inject(adev, info);
1021 else
1022 ret = -EINVAL;
1023 break;
1024 case AMDGPU_RAS_BLOCK__UMC:
1025 case AMDGPU_RAS_BLOCK__SDMA:
1026 case AMDGPU_RAS_BLOCK__MMHUB:
1027 case AMDGPU_RAS_BLOCK__PCIE_BIF:
1028 ret = psp_ras_trigger_error(&adev->psp, &block_info);
1029 break;
1030 case AMDGPU_RAS_BLOCK__XGMI_WAFL:
1031 ret = amdgpu_ras_error_inject_xgmi(adev, &block_info);
1032 break;
1033 default:
1034 dev_info(adev->dev, "%s error injection is not supported yet\n",
1035 ras_block_str(info->head.block));
1036 ret = -EINVAL;
1037 }
1038
1039 if (ret)
1040 dev_err(adev->dev, "ras inject %s failed %d\n",
1041 ras_block_str(info->head.block), ret);
1042
1043 return ret;
1044}
1045
1046/**
1047 * amdgpu_ras_query_error_count -- Get error counts of all IPs
1048 * adev: pointer to AMD GPU device
1049 * ce_count: pointer to an integer to be set to the count of correctible errors.
1050 * ue_count: pointer to an integer to be set to the count of uncorrectible
1051 * errors.
1052 *
1053 * If set, @ce_count or @ue_count, count and return the corresponding
1054 * error counts in those integer pointers. Return 0 if the device
1055 * supports RAS. Return -EOPNOTSUPP if the device doesn't support RAS.
1056 */
1057int amdgpu_ras_query_error_count(struct amdgpu_device *adev,
1058 unsigned long *ce_count,
1059 unsigned long *ue_count)
1060{
1061 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1062 struct ras_manager *obj;
1063 unsigned long ce, ue;
1064
1065 if (!adev->ras_enabled || !con)
1066 return -EOPNOTSUPP;
1067
1068 /* Don't count since no reporting.
1069 */
1070 if (!ce_count && !ue_count)
1071 return 0;
1072
1073 ce = 0;
1074 ue = 0;
1075 list_for_each_entry(obj, &con->head, node) {
1076 struct ras_query_if info = {
1077 .head = obj->head,
1078 };
1079 int res;
1080
1081 res = amdgpu_ras_query_error_status(adev, &info);
1082 if (res)
1083 return res;
1084
1085 ce += info.ce_count;
1086 ue += info.ue_count;
1087 }
1088
1089 if (ce_count)
1090 *ce_count = ce;
1091
1092 if (ue_count)
1093 *ue_count = ue;
1094
1095 return 0;
1096}
1097/* query/inject/cure end */
1098
1099
1100/* sysfs begin */
1101
1102static int amdgpu_ras_badpages_read(struct amdgpu_device *adev,
1103 struct ras_badpage **bps, unsigned int *count);
1104
1105static char *amdgpu_ras_badpage_flags_str(unsigned int flags)
1106{
1107 switch (flags) {
1108 case AMDGPU_RAS_RETIRE_PAGE_RESERVED:
1109 return "R";
1110 case AMDGPU_RAS_RETIRE_PAGE_PENDING:
1111 return "P";
1112 case AMDGPU_RAS_RETIRE_PAGE_FAULT:
1113 default:
1114 return "F";
1115 }
1116}
1117
1118/**
1119 * DOC: AMDGPU RAS sysfs gpu_vram_bad_pages Interface
1120 *
1121 * It allows user to read the bad pages of vram on the gpu through
1122 * /sys/class/drm/card[0/1/2...]/device/ras/gpu_vram_bad_pages
1123 *
1124 * It outputs multiple lines, and each line stands for one gpu page.
1125 *
1126 * The format of one line is below,
1127 * gpu pfn : gpu page size : flags
1128 *
1129 * gpu pfn and gpu page size are printed in hex format.
1130 * flags can be one of below character,
1131 *
1132 * R: reserved, this gpu page is reserved and not able to use.
1133 *
1134 * P: pending for reserve, this gpu page is marked as bad, will be reserved
1135 * in next window of page_reserve.
1136 *
1137 * F: unable to reserve. this gpu page can't be reserved due to some reasons.
1138 *
1139 * Examples:
1140 *
1141 * .. code-block:: bash
1142 *
1143 * 0x00000001 : 0x00001000 : R
1144 * 0x00000002 : 0x00001000 : P
1145 *
1146 */
1147
1148static ssize_t amdgpu_ras_sysfs_badpages_read(struct file *f,
1149 struct kobject *kobj, struct bin_attribute *attr,
1150 char *buf, loff_t ppos, size_t count)
1151{
1152 struct amdgpu_ras *con =
1153 container_of(attr, struct amdgpu_ras, badpages_attr);
1154 struct amdgpu_device *adev = con->adev;
1155 const unsigned int element_size =
1156 sizeof("0xabcdabcd : 0x12345678 : R\n") - 1;
1157 unsigned int start = div64_ul(ppos + element_size - 1, element_size);
1158 unsigned int end = div64_ul(ppos + count - 1, element_size);
1159 ssize_t s = 0;
1160 struct ras_badpage *bps = NULL;
1161 unsigned int bps_count = 0;
1162
1163 memset(buf, 0, count);
1164
1165 if (amdgpu_ras_badpages_read(adev, &bps, &bps_count))
1166 return 0;
1167
1168 for (; start < end && start < bps_count; start++)
1169 s += scnprintf(&buf[s], element_size + 1,
1170 "0x%08x : 0x%08x : %1s\n",
1171 bps[start].bp,
1172 bps[start].size,
1173 amdgpu_ras_badpage_flags_str(bps[start].flags));
1174
1175 kfree(bps);
1176
1177 return s;
1178}
1179
1180static ssize_t amdgpu_ras_sysfs_features_read(struct device *dev,
1181 struct device_attribute *attr, char *buf)
1182{
1183 struct amdgpu_ras *con =
1184 container_of(attr, struct amdgpu_ras, features_attr);
1185
1186 return scnprintf(buf, PAGE_SIZE, "feature mask: 0x%x\n", con->features);
1187}
1188
1189static void amdgpu_ras_sysfs_remove_bad_page_node(struct amdgpu_device *adev)
1190{
1191 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1192
1193 sysfs_remove_file_from_group(&adev->dev->kobj,
1194 &con->badpages_attr.attr,
1195 RAS_FS_NAME);
1196}
1197
1198static int amdgpu_ras_sysfs_remove_feature_node(struct amdgpu_device *adev)
1199{
1200 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1201 struct attribute *attrs[] = {
1202 &con->features_attr.attr,
1203 NULL
1204 };
1205 struct attribute_group group = {
1206 .name = RAS_FS_NAME,
1207 .attrs = attrs,
1208 };
1209
1210 sysfs_remove_group(&adev->dev->kobj, &group);
1211
1212 return 0;
1213}
1214
1215int amdgpu_ras_sysfs_create(struct amdgpu_device *adev,
1216 struct ras_fs_if *head)
1217{
1218 struct ras_manager *obj = amdgpu_ras_find_obj(adev, &head->head);
1219
1220 if (!obj || obj->attr_inuse)
1221 return -EINVAL;
1222
1223 get_obj(obj);
1224
1225 memcpy(obj->fs_data.sysfs_name,
1226 head->sysfs_name,
1227 sizeof(obj->fs_data.sysfs_name));
1228
1229 obj->sysfs_attr = (struct device_attribute){
1230 .attr = {
1231 .name = obj->fs_data.sysfs_name,
1232 .mode = S_IRUGO,
1233 },
1234 .show = amdgpu_ras_sysfs_read,
1235 };
1236 sysfs_attr_init(&obj->sysfs_attr.attr);
1237
1238 if (sysfs_add_file_to_group(&adev->dev->kobj,
1239 &obj->sysfs_attr.attr,
1240 RAS_FS_NAME)) {
1241 put_obj(obj);
1242 return -EINVAL;
1243 }
1244
1245 obj->attr_inuse = 1;
1246
1247 return 0;
1248}
1249
1250int amdgpu_ras_sysfs_remove(struct amdgpu_device *adev,
1251 struct ras_common_if *head)
1252{
1253 struct ras_manager *obj = amdgpu_ras_find_obj(adev, head);
1254
1255 if (!obj || !obj->attr_inuse)
1256 return -EINVAL;
1257
1258 sysfs_remove_file_from_group(&adev->dev->kobj,
1259 &obj->sysfs_attr.attr,
1260 RAS_FS_NAME);
1261 obj->attr_inuse = 0;
1262 put_obj(obj);
1263
1264 return 0;
1265}
1266
1267static int amdgpu_ras_sysfs_remove_all(struct amdgpu_device *adev)
1268{
1269 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1270 struct ras_manager *obj, *tmp;
1271
1272 list_for_each_entry_safe(obj, tmp, &con->head, node) {
1273 amdgpu_ras_sysfs_remove(adev, &obj->head);
1274 }
1275
1276 if (amdgpu_bad_page_threshold != 0)
1277 amdgpu_ras_sysfs_remove_bad_page_node(adev);
1278
1279 amdgpu_ras_sysfs_remove_feature_node(adev);
1280
1281 return 0;
1282}
1283/* sysfs end */
1284
1285/**
1286 * DOC: AMDGPU RAS Reboot Behavior for Unrecoverable Errors
1287 *
1288 * Normally when there is an uncorrectable error, the driver will reset
1289 * the GPU to recover. However, in the event of an unrecoverable error,
1290 * the driver provides an interface to reboot the system automatically
1291 * in that event.
1292 *
1293 * The following file in debugfs provides that interface:
1294 * /sys/kernel/debug/dri/[0/1/2...]/ras/auto_reboot
1295 *
1296 * Usage:
1297 *
1298 * .. code-block:: bash
1299 *
1300 * echo true > .../ras/auto_reboot
1301 *
1302 */
1303/* debugfs begin */
1304static struct dentry *amdgpu_ras_debugfs_create_ctrl_node(struct amdgpu_device *adev)
1305{
1306 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1307 struct drm_minor *minor = adev_to_drm(adev)->primary;
1308 struct dentry *dir;
1309
1310 dir = debugfs_create_dir(RAS_FS_NAME, minor->debugfs_root);
1311 debugfs_create_file("ras_ctrl", S_IWUGO | S_IRUGO, dir, adev,
1312 &amdgpu_ras_debugfs_ctrl_ops);
1313 debugfs_create_file("ras_eeprom_reset", S_IWUGO | S_IRUGO, dir, adev,
1314 &amdgpu_ras_debugfs_eeprom_ops);
1315 debugfs_create_u32("bad_page_cnt_threshold", 0444, dir,
1316 &con->bad_page_cnt_threshold);
1317 debugfs_create_x32("ras_hw_enabled", 0444, dir, &adev->ras_hw_enabled);
1318 debugfs_create_x32("ras_enabled", 0444, dir, &adev->ras_enabled);
1319
1320 /*
1321 * After one uncorrectable error happens, usually GPU recovery will
1322 * be scheduled. But due to the known problem in GPU recovery failing
1323 * to bring GPU back, below interface provides one direct way to
1324 * user to reboot system automatically in such case within
1325 * ERREVENT_ATHUB_INTERRUPT generated. Normal GPU recovery routine
1326 * will never be called.
1327 */
1328 debugfs_create_bool("auto_reboot", S_IWUGO | S_IRUGO, dir, &con->reboot);
1329
1330 /*
1331 * User could set this not to clean up hardware's error count register
1332 * of RAS IPs during ras recovery.
1333 */
1334 debugfs_create_bool("disable_ras_err_cnt_harvest", 0644, dir,
1335 &con->disable_ras_err_cnt_harvest);
1336 return dir;
1337}
1338
1339static void amdgpu_ras_debugfs_create(struct amdgpu_device *adev,
1340 struct ras_fs_if *head,
1341 struct dentry *dir)
1342{
1343 struct ras_manager *obj = amdgpu_ras_find_obj(adev, &head->head);
1344
1345 if (!obj || !dir)
1346 return;
1347
1348 get_obj(obj);
1349
1350 memcpy(obj->fs_data.debugfs_name,
1351 head->debugfs_name,
1352 sizeof(obj->fs_data.debugfs_name));
1353
1354 debugfs_create_file(obj->fs_data.debugfs_name, S_IWUGO | S_IRUGO, dir,
1355 obj, &amdgpu_ras_debugfs_ops);
1356}
1357
1358void amdgpu_ras_debugfs_create_all(struct amdgpu_device *adev)
1359{
1360 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1361 struct dentry *dir;
1362 struct ras_manager *obj;
1363 struct ras_fs_if fs_info;
1364
1365 /*
1366 * it won't be called in resume path, no need to check
1367 * suspend and gpu reset status
1368 */
1369 if (!IS_ENABLED(CONFIG_DEBUG_FS) || !con)
1370 return;
1371
1372 dir = amdgpu_ras_debugfs_create_ctrl_node(adev);
1373
1374 list_for_each_entry(obj, &con->head, node) {
1375 if (amdgpu_ras_is_supported(adev, obj->head.block) &&
1376 (obj->attr_inuse == 1)) {
1377 sprintf(fs_info.debugfs_name, "%s_err_inject",
1378 ras_block_str(obj->head.block));
1379 fs_info.head = obj->head;
1380 amdgpu_ras_debugfs_create(adev, &fs_info, dir);
1381 }
1382 }
1383}
1384
1385/* debugfs end */
1386
1387/* ras fs */
1388static BIN_ATTR(gpu_vram_bad_pages, S_IRUGO,
1389 amdgpu_ras_sysfs_badpages_read, NULL, 0);
1390static DEVICE_ATTR(features, S_IRUGO,
1391 amdgpu_ras_sysfs_features_read, NULL);
1392static int amdgpu_ras_fs_init(struct amdgpu_device *adev)
1393{
1394 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1395 struct attribute_group group = {
1396 .name = RAS_FS_NAME,
1397 };
1398 struct attribute *attrs[] = {
1399 &con->features_attr.attr,
1400 NULL
1401 };
1402 struct bin_attribute *bin_attrs[] = {
1403 NULL,
1404 NULL,
1405 };
1406 int r;
1407
1408 /* add features entry */
1409 con->features_attr = dev_attr_features;
1410 group.attrs = attrs;
1411 sysfs_attr_init(attrs[0]);
1412
1413 if (amdgpu_bad_page_threshold != 0) {
1414 /* add bad_page_features entry */
1415 bin_attr_gpu_vram_bad_pages.private = NULL;
1416 con->badpages_attr = bin_attr_gpu_vram_bad_pages;
1417 bin_attrs[0] = &con->badpages_attr;
1418 group.bin_attrs = bin_attrs;
1419 sysfs_bin_attr_init(bin_attrs[0]);
1420 }
1421
1422 r = sysfs_create_group(&adev->dev->kobj, &group);
1423 if (r)
1424 dev_err(adev->dev, "Failed to create RAS sysfs group!");
1425
1426 return 0;
1427}
1428
1429static int amdgpu_ras_fs_fini(struct amdgpu_device *adev)
1430{
1431 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1432 struct ras_manager *con_obj, *ip_obj, *tmp;
1433
1434 if (IS_ENABLED(CONFIG_DEBUG_FS)) {
1435 list_for_each_entry_safe(con_obj, tmp, &con->head, node) {
1436 ip_obj = amdgpu_ras_find_obj(adev, &con_obj->head);
1437 if (ip_obj)
1438 put_obj(ip_obj);
1439 }
1440 }
1441
1442 amdgpu_ras_sysfs_remove_all(adev);
1443 return 0;
1444}
1445/* ras fs end */
1446
1447/* ih begin */
1448static void amdgpu_ras_interrupt_handler(struct ras_manager *obj)
1449{
1450 struct ras_ih_data *data = &obj->ih_data;
1451 struct amdgpu_iv_entry entry;
1452 int ret;
1453 struct ras_err_data err_data = {0, 0, 0, NULL};
1454
1455 while (data->rptr != data->wptr) {
1456 rmb();
1457 memcpy(&entry, &data->ring[data->rptr],
1458 data->element_size);
1459
1460 wmb();
1461 data->rptr = (data->aligned_element_size +
1462 data->rptr) % data->ring_size;
1463
1464 /* Let IP handle its data, maybe we need get the output
1465 * from the callback to udpate the error type/count, etc
1466 */
1467 if (data->cb) {
1468 ret = data->cb(obj->adev, &err_data, &entry);
1469 /* ue will trigger an interrupt, and in that case
1470 * we need do a reset to recovery the whole system.
1471 * But leave IP do that recovery, here we just dispatch
1472 * the error.
1473 */
1474 if (ret == AMDGPU_RAS_SUCCESS) {
1475 /* these counts could be left as 0 if
1476 * some blocks do not count error number
1477 */
1478 obj->err_data.ue_count += err_data.ue_count;
1479 obj->err_data.ce_count += err_data.ce_count;
1480 }
1481 }
1482 }
1483}
1484
1485static void amdgpu_ras_interrupt_process_handler(struct work_struct *work)
1486{
1487 struct ras_ih_data *data =
1488 container_of(work, struct ras_ih_data, ih_work);
1489 struct ras_manager *obj =
1490 container_of(data, struct ras_manager, ih_data);
1491
1492 amdgpu_ras_interrupt_handler(obj);
1493}
1494
1495int amdgpu_ras_interrupt_dispatch(struct amdgpu_device *adev,
1496 struct ras_dispatch_if *info)
1497{
1498 struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head);
1499 struct ras_ih_data *data = &obj->ih_data;
1500
1501 if (!obj)
1502 return -EINVAL;
1503
1504 if (data->inuse == 0)
1505 return 0;
1506
1507 /* Might be overflow... */
1508 memcpy(&data->ring[data->wptr], info->entry,
1509 data->element_size);
1510
1511 wmb();
1512 data->wptr = (data->aligned_element_size +
1513 data->wptr) % data->ring_size;
1514
1515 schedule_work(&data->ih_work);
1516
1517 return 0;
1518}
1519
1520int amdgpu_ras_interrupt_remove_handler(struct amdgpu_device *adev,
1521 struct ras_ih_if *info)
1522{
1523 struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head);
1524 struct ras_ih_data *data;
1525
1526 if (!obj)
1527 return -EINVAL;
1528
1529 data = &obj->ih_data;
1530 if (data->inuse == 0)
1531 return 0;
1532
1533 cancel_work_sync(&data->ih_work);
1534
1535 kfree(data->ring);
1536 memset(data, 0, sizeof(*data));
1537 put_obj(obj);
1538
1539 return 0;
1540}
1541
1542int amdgpu_ras_interrupt_add_handler(struct amdgpu_device *adev,
1543 struct ras_ih_if *info)
1544{
1545 struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head);
1546 struct ras_ih_data *data;
1547
1548 if (!obj) {
1549 /* in case we registe the IH before enable ras feature */
1550 obj = amdgpu_ras_create_obj(adev, &info->head);
1551 if (!obj)
1552 return -EINVAL;
1553 } else
1554 get_obj(obj);
1555
1556 data = &obj->ih_data;
1557 /* add the callback.etc */
1558 *data = (struct ras_ih_data) {
1559 .inuse = 0,
1560 .cb = info->cb,
1561 .element_size = sizeof(struct amdgpu_iv_entry),
1562 .rptr = 0,
1563 .wptr = 0,
1564 };
1565
1566 INIT_WORK(&data->ih_work, amdgpu_ras_interrupt_process_handler);
1567
1568 data->aligned_element_size = ALIGN(data->element_size, 8);
1569 /* the ring can store 64 iv entries. */
1570 data->ring_size = 64 * data->aligned_element_size;
1571 data->ring = kmalloc(data->ring_size, GFP_KERNEL);
1572 if (!data->ring) {
1573 put_obj(obj);
1574 return -ENOMEM;
1575 }
1576
1577 /* IH is ready */
1578 data->inuse = 1;
1579
1580 return 0;
1581}
1582
1583static int amdgpu_ras_interrupt_remove_all(struct amdgpu_device *adev)
1584{
1585 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1586 struct ras_manager *obj, *tmp;
1587
1588 list_for_each_entry_safe(obj, tmp, &con->head, node) {
1589 struct ras_ih_if info = {
1590 .head = obj->head,
1591 };
1592 amdgpu_ras_interrupt_remove_handler(adev, &info);
1593 }
1594
1595 return 0;
1596}
1597/* ih end */
1598
1599/* traversal all IPs except NBIO to query error counter */
1600static void amdgpu_ras_log_on_err_counter(struct amdgpu_device *adev)
1601{
1602 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1603 struct ras_manager *obj;
1604
1605 if (!adev->ras_enabled || !con)
1606 return;
1607
1608 list_for_each_entry(obj, &con->head, node) {
1609 struct ras_query_if info = {
1610 .head = obj->head,
1611 };
1612
1613 /*
1614 * PCIE_BIF IP has one different isr by ras controller
1615 * interrupt, the specific ras counter query will be
1616 * done in that isr. So skip such block from common
1617 * sync flood interrupt isr calling.
1618 */
1619 if (info.head.block == AMDGPU_RAS_BLOCK__PCIE_BIF)
1620 continue;
1621
1622 amdgpu_ras_query_error_status(adev, &info);
1623 }
1624}
1625
1626/* Parse RdRspStatus and WrRspStatus */
1627static void amdgpu_ras_error_status_query(struct amdgpu_device *adev,
1628 struct ras_query_if *info)
1629{
1630 /*
1631 * Only two block need to query read/write
1632 * RspStatus at current state
1633 */
1634 switch (info->head.block) {
1635 case AMDGPU_RAS_BLOCK__GFX:
1636 if (adev->gfx.ras_funcs &&
1637 adev->gfx.ras_funcs->query_ras_error_status)
1638 adev->gfx.ras_funcs->query_ras_error_status(adev);
1639 break;
1640 case AMDGPU_RAS_BLOCK__MMHUB:
1641 if (adev->mmhub.ras_funcs &&
1642 adev->mmhub.ras_funcs->query_ras_error_status)
1643 adev->mmhub.ras_funcs->query_ras_error_status(adev);
1644 break;
1645 default:
1646 break;
1647 }
1648}
1649
1650static void amdgpu_ras_query_err_status(struct amdgpu_device *adev)
1651{
1652 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1653 struct ras_manager *obj;
1654
1655 if (!adev->ras_enabled || !con)
1656 return;
1657
1658 list_for_each_entry(obj, &con->head, node) {
1659 struct ras_query_if info = {
1660 .head = obj->head,
1661 };
1662
1663 amdgpu_ras_error_status_query(adev, &info);
1664 }
1665}
1666
1667/* recovery begin */
1668
1669/* return 0 on success.
1670 * caller need free bps.
1671 */
1672static int amdgpu_ras_badpages_read(struct amdgpu_device *adev,
1673 struct ras_badpage **bps, unsigned int *count)
1674{
1675 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1676 struct ras_err_handler_data *data;
1677 int i = 0;
1678 int ret = 0, status;
1679
1680 if (!con || !con->eh_data || !bps || !count)
1681 return -EINVAL;
1682
1683 mutex_lock(&con->recovery_lock);
1684 data = con->eh_data;
1685 if (!data || data->count == 0) {
1686 *bps = NULL;
1687 ret = -EINVAL;
1688 goto out;
1689 }
1690
1691 *bps = kmalloc(sizeof(struct ras_badpage) * data->count, GFP_KERNEL);
1692 if (!*bps) {
1693 ret = -ENOMEM;
1694 goto out;
1695 }
1696
1697 for (; i < data->count; i++) {
1698 (*bps)[i] = (struct ras_badpage){
1699 .bp = data->bps[i].retired_page,
1700 .size = AMDGPU_GPU_PAGE_SIZE,
1701 .flags = AMDGPU_RAS_RETIRE_PAGE_RESERVED,
1702 };
1703 status = amdgpu_vram_mgr_query_page_status(
1704 ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM),
1705 data->bps[i].retired_page);
1706 if (status == -EBUSY)
1707 (*bps)[i].flags = AMDGPU_RAS_RETIRE_PAGE_PENDING;
1708 else if (status == -ENOENT)
1709 (*bps)[i].flags = AMDGPU_RAS_RETIRE_PAGE_FAULT;
1710 }
1711
1712 *count = data->count;
1713out:
1714 mutex_unlock(&con->recovery_lock);
1715 return ret;
1716}
1717
1718static void amdgpu_ras_do_recovery(struct work_struct *work)
1719{
1720 struct amdgpu_ras *ras =
1721 container_of(work, struct amdgpu_ras, recovery_work);
1722 struct amdgpu_device *remote_adev = NULL;
1723 struct amdgpu_device *adev = ras->adev;
1724 struct list_head device_list, *device_list_handle = NULL;
1725
1726 if (!ras->disable_ras_err_cnt_harvest) {
1727 struct amdgpu_hive_info *hive = amdgpu_get_xgmi_hive(adev);
1728
1729 /* Build list of devices to query RAS related errors */
1730 if (hive && adev->gmc.xgmi.num_physical_nodes > 1) {
1731 device_list_handle = &hive->device_list;
1732 } else {
1733 INIT_LIST_HEAD(&device_list);
1734 list_add_tail(&adev->gmc.xgmi.head, &device_list);
1735 device_list_handle = &device_list;
1736 }
1737
1738 list_for_each_entry(remote_adev,
1739 device_list_handle, gmc.xgmi.head) {
1740 amdgpu_ras_query_err_status(remote_adev);
1741 amdgpu_ras_log_on_err_counter(remote_adev);
1742 }
1743
1744 amdgpu_put_xgmi_hive(hive);
1745 }
1746
1747 if (amdgpu_device_should_recover_gpu(ras->adev))
1748 amdgpu_device_gpu_recover(ras->adev, NULL);
1749 atomic_set(&ras->in_recovery, 0);
1750}
1751
1752/* alloc/realloc bps array */
1753static int amdgpu_ras_realloc_eh_data_space(struct amdgpu_device *adev,
1754 struct ras_err_handler_data *data, int pages)
1755{
1756 unsigned int old_space = data->count + data->space_left;
1757 unsigned int new_space = old_space + pages;
1758 unsigned int align_space = ALIGN(new_space, 512);
1759 void *bps = kmalloc(align_space * sizeof(*data->bps), GFP_KERNEL);
1760
1761 if (!bps) {
1762 kfree(bps);
1763 return -ENOMEM;
1764 }
1765
1766 if (data->bps) {
1767 memcpy(bps, data->bps,
1768 data->count * sizeof(*data->bps));
1769 kfree(data->bps);
1770 }
1771
1772 data->bps = bps;
1773 data->space_left += align_space - old_space;
1774 return 0;
1775}
1776
1777/* it deal with vram only. */
1778int amdgpu_ras_add_bad_pages(struct amdgpu_device *adev,
1779 struct eeprom_table_record *bps, int pages)
1780{
1781 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1782 struct ras_err_handler_data *data;
1783 int ret = 0;
1784 uint32_t i;
1785
1786 if (!con || !con->eh_data || !bps || pages <= 0)
1787 return 0;
1788
1789 mutex_lock(&con->recovery_lock);
1790 data = con->eh_data;
1791 if (!data)
1792 goto out;
1793
1794 for (i = 0; i < pages; i++) {
1795 if (amdgpu_ras_check_bad_page_unlock(con,
1796 bps[i].retired_page << AMDGPU_GPU_PAGE_SHIFT))
1797 continue;
1798
1799 if (!data->space_left &&
1800 amdgpu_ras_realloc_eh_data_space(adev, data, 256)) {
1801 ret = -ENOMEM;
1802 goto out;
1803 }
1804
1805 amdgpu_vram_mgr_reserve_range(
1806 ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM),
1807 bps[i].retired_page << AMDGPU_GPU_PAGE_SHIFT,
1808 AMDGPU_GPU_PAGE_SIZE);
1809
1810 memcpy(&data->bps[data->count], &bps[i], sizeof(*data->bps));
1811 data->count++;
1812 data->space_left--;
1813 }
1814out:
1815 mutex_unlock(&con->recovery_lock);
1816
1817 return ret;
1818}
1819
1820/*
1821 * write error record array to eeprom, the function should be
1822 * protected by recovery_lock
1823 */
1824int amdgpu_ras_save_bad_pages(struct amdgpu_device *adev)
1825{
1826 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1827 struct ras_err_handler_data *data;
1828 struct amdgpu_ras_eeprom_control *control;
1829 int save_count;
1830
1831 if (!con || !con->eh_data)
1832 return 0;
1833
1834 control = &con->eeprom_control;
1835 data = con->eh_data;
1836 save_count = data->count - control->num_recs;
1837 /* only new entries are saved */
1838 if (save_count > 0) {
1839 if (amdgpu_ras_eeprom_process_recods(control,
1840 &data->bps[control->num_recs],
1841 true,
1842 save_count)) {
1843 dev_err(adev->dev, "Failed to save EEPROM table data!");
1844 return -EIO;
1845 }
1846
1847 dev_info(adev->dev, "Saved %d pages to EEPROM table.\n", save_count);
1848 }
1849
1850 return 0;
1851}
1852
1853/*
1854 * read error record array in eeprom and reserve enough space for
1855 * storing new bad pages
1856 */
1857static int amdgpu_ras_load_bad_pages(struct amdgpu_device *adev)
1858{
1859 struct amdgpu_ras_eeprom_control *control =
1860 &adev->psp.ras.ras->eeprom_control;
1861 struct eeprom_table_record *bps = NULL;
1862 int ret = 0;
1863
1864 /* no bad page record, skip eeprom access */
1865 if (!control->num_recs || (amdgpu_bad_page_threshold == 0))
1866 return ret;
1867
1868 bps = kcalloc(control->num_recs, sizeof(*bps), GFP_KERNEL);
1869 if (!bps)
1870 return -ENOMEM;
1871
1872 if (amdgpu_ras_eeprom_process_recods(control, bps, false,
1873 control->num_recs)) {
1874 dev_err(adev->dev, "Failed to load EEPROM table records!");
1875 ret = -EIO;
1876 goto out;
1877 }
1878
1879 ret = amdgpu_ras_add_bad_pages(adev, bps, control->num_recs);
1880
1881out:
1882 kfree(bps);
1883 return ret;
1884}
1885
1886static bool amdgpu_ras_check_bad_page_unlock(struct amdgpu_ras *con,
1887 uint64_t addr)
1888{
1889 struct ras_err_handler_data *data = con->eh_data;
1890 int i;
1891
1892 addr >>= AMDGPU_GPU_PAGE_SHIFT;
1893 for (i = 0; i < data->count; i++)
1894 if (addr == data->bps[i].retired_page)
1895 return true;
1896
1897 return false;
1898}
1899
1900/*
1901 * check if an address belongs to bad page
1902 *
1903 * Note: this check is only for umc block
1904 */
1905static bool amdgpu_ras_check_bad_page(struct amdgpu_device *adev,
1906 uint64_t addr)
1907{
1908 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1909 bool ret = false;
1910
1911 if (!con || !con->eh_data)
1912 return ret;
1913
1914 mutex_lock(&con->recovery_lock);
1915 ret = amdgpu_ras_check_bad_page_unlock(con, addr);
1916 mutex_unlock(&con->recovery_lock);
1917 return ret;
1918}
1919
1920static void amdgpu_ras_validate_threshold(struct amdgpu_device *adev,
1921 uint32_t max_length)
1922{
1923 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1924 int tmp_threshold = amdgpu_bad_page_threshold;
1925 u64 val;
1926
1927 /*
1928 * Justification of value bad_page_cnt_threshold in ras structure
1929 *
1930 * Generally, -1 <= amdgpu_bad_page_threshold <= max record length
1931 * in eeprom, and introduce two scenarios accordingly.
1932 *
1933 * Bad page retirement enablement:
1934 * - If amdgpu_bad_page_threshold = -1,
1935 * bad_page_cnt_threshold = typical value by formula.
1936 *
1937 * - When the value from user is 0 < amdgpu_bad_page_threshold <
1938 * max record length in eeprom, use it directly.
1939 *
1940 * Bad page retirement disablement:
1941 * - If amdgpu_bad_page_threshold = 0, bad page retirement
1942 * functionality is disabled, and bad_page_cnt_threshold will
1943 * take no effect.
1944 */
1945
1946 if (tmp_threshold < -1)
1947 tmp_threshold = -1;
1948 else if (tmp_threshold > max_length)
1949 tmp_threshold = max_length;
1950
1951 if (tmp_threshold == -1) {
1952 val = adev->gmc.mc_vram_size;
1953 do_div(val, RAS_BAD_PAGE_RATE);
1954 con->bad_page_cnt_threshold = min(lower_32_bits(val),
1955 max_length);
1956 } else {
1957 con->bad_page_cnt_threshold = tmp_threshold;
1958 }
1959}
1960
1961int amdgpu_ras_recovery_init(struct amdgpu_device *adev)
1962{
1963 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
1964 struct ras_err_handler_data **data;
1965 uint32_t max_eeprom_records_len = 0;
1966 bool exc_err_limit = false;
1967 int ret;
1968
1969 if (!con)
1970 return 0;
1971
1972 /* Allow access to RAS EEPROM via debugfs, when the ASIC
1973 * supports RAS and debugfs is enabled, but when
1974 * adev->ras_enabled is unset, i.e. when "ras_enable"
1975 * module parameter is set to 0.
1976 */
1977 con->adev = adev;
1978
1979 if (!adev->ras_enabled)
1980 return 0;
1981
1982 data = &con->eh_data;
1983 *data = kmalloc(sizeof(**data), GFP_KERNEL | __GFP_ZERO);
1984 if (!*data) {
1985 ret = -ENOMEM;
1986 goto out;
1987 }
1988
1989 mutex_init(&con->recovery_lock);
1990 INIT_WORK(&con->recovery_work, amdgpu_ras_do_recovery);
1991 atomic_set(&con->in_recovery, 0);
1992
1993 max_eeprom_records_len = amdgpu_ras_eeprom_get_record_max_length();
1994 amdgpu_ras_validate_threshold(adev, max_eeprom_records_len);
1995
1996 /* Todo: During test the SMU might fail to read the eeprom through I2C
1997 * when the GPU is pending on XGMI reset during probe time
1998 * (Mostly after second bus reset), skip it now
1999 */
2000 if (adev->gmc.xgmi.pending_reset)
2001 return 0;
2002 ret = amdgpu_ras_eeprom_init(&con->eeprom_control, &exc_err_limit);
2003 /*
2004 * This calling fails when exc_err_limit is true or
2005 * ret != 0.
2006 */
2007 if (exc_err_limit || ret)
2008 goto free;
2009
2010 if (con->eeprom_control.num_recs) {
2011 ret = amdgpu_ras_load_bad_pages(adev);
2012 if (ret)
2013 goto free;
2014
2015 if (adev->smu.ppt_funcs && adev->smu.ppt_funcs->send_hbm_bad_pages_num)
2016 adev->smu.ppt_funcs->send_hbm_bad_pages_num(&adev->smu, con->eeprom_control.num_recs);
2017 }
2018
2019 return 0;
2020
2021free:
2022 kfree((*data)->bps);
2023 kfree(*data);
2024 con->eh_data = NULL;
2025out:
2026 dev_warn(adev->dev, "Failed to initialize ras recovery!\n");
2027
2028 /*
2029 * Except error threshold exceeding case, other failure cases in this
2030 * function would not fail amdgpu driver init.
2031 */
2032 if (!exc_err_limit)
2033 ret = 0;
2034 else
2035 ret = -EINVAL;
2036
2037 return ret;
2038}
2039
2040static int amdgpu_ras_recovery_fini(struct amdgpu_device *adev)
2041{
2042 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
2043 struct ras_err_handler_data *data = con->eh_data;
2044
2045 /* recovery_init failed to init it, fini is useless */
2046 if (!data)
2047 return 0;
2048
2049 cancel_work_sync(&con->recovery_work);
2050
2051 mutex_lock(&con->recovery_lock);
2052 con->eh_data = NULL;
2053 kfree(data->bps);
2054 kfree(data);
2055 mutex_unlock(&con->recovery_lock);
2056
2057 return 0;
2058}
2059/* recovery end */
2060
2061/* return 0 if ras will reset gpu and repost.*/
2062int amdgpu_ras_request_reset_on_boot(struct amdgpu_device *adev,
2063 unsigned int block)
2064{
2065 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
2066
2067 if (!ras)
2068 return -EINVAL;
2069
2070 ras->flags |= AMDGPU_RAS_FLAG_INIT_NEED_RESET;
2071 return 0;
2072}
2073
2074static bool amdgpu_ras_asic_supported(struct amdgpu_device *adev)
2075{
2076 return adev->asic_type == CHIP_VEGA10 ||
2077 adev->asic_type == CHIP_VEGA20 ||
2078 adev->asic_type == CHIP_ARCTURUS ||
2079 adev->asic_type == CHIP_ALDEBARAN ||
2080 adev->asic_type == CHIP_SIENNA_CICHLID;
2081}
2082
2083/*
2084 * this is workaround for vega20 workstation sku,
2085 * force enable gfx ras, ignore vbios gfx ras flag
2086 * due to GC EDC can not write
2087 */
2088static void amdgpu_ras_get_quirks(struct amdgpu_device *adev)
2089{
2090 struct atom_context *ctx = adev->mode_info.atom_context;
2091
2092 if (!ctx)
2093 return;
2094
2095 if (strnstr(ctx->vbios_version, "D16406",
2096 sizeof(ctx->vbios_version)) ||
2097 strnstr(ctx->vbios_version, "D36002",
2098 sizeof(ctx->vbios_version)))
2099 adev->ras_hw_enabled |= (1 << AMDGPU_RAS_BLOCK__GFX);
2100}
2101
2102/*
2103 * check hardware's ras ability which will be saved in hw_supported.
2104 * if hardware does not support ras, we can skip some ras initializtion and
2105 * forbid some ras operations from IP.
2106 * if software itself, say boot parameter, limit the ras ability. We still
2107 * need allow IP do some limited operations, like disable. In such case,
2108 * we have to initialize ras as normal. but need check if operation is
2109 * allowed or not in each function.
2110 */
2111static void amdgpu_ras_check_supported(struct amdgpu_device *adev)
2112{
2113 adev->ras_hw_enabled = adev->ras_enabled = 0;
2114
2115 if (amdgpu_sriov_vf(adev) || !adev->is_atom_fw ||
2116 !amdgpu_ras_asic_supported(adev))
2117 return;
2118
2119 if (!adev->gmc.xgmi.connected_to_cpu) {
2120 if (amdgpu_atomfirmware_mem_ecc_supported(adev)) {
2121 dev_info(adev->dev, "MEM ECC is active.\n");
2122 adev->ras_hw_enabled |= (1 << AMDGPU_RAS_BLOCK__UMC |
2123 1 << AMDGPU_RAS_BLOCK__DF);
2124 } else {
2125 dev_info(adev->dev, "MEM ECC is not presented.\n");
2126 }
2127
2128 if (amdgpu_atomfirmware_sram_ecc_supported(adev)) {
2129 dev_info(adev->dev, "SRAM ECC is active.\n");
2130 adev->ras_hw_enabled |= ~(1 << AMDGPU_RAS_BLOCK__UMC |
2131 1 << AMDGPU_RAS_BLOCK__DF);
2132 } else {
2133 dev_info(adev->dev, "SRAM ECC is not presented.\n");
2134 }
2135 } else {
2136 /* driver only manages a few IP blocks RAS feature
2137 * when GPU is connected cpu through XGMI */
2138 adev->ras_hw_enabled |= (1 << AMDGPU_RAS_BLOCK__GFX |
2139 1 << AMDGPU_RAS_BLOCK__SDMA |
2140 1 << AMDGPU_RAS_BLOCK__MMHUB);
2141 }
2142
2143 amdgpu_ras_get_quirks(adev);
2144
2145 /* hw_supported needs to be aligned with RAS block mask. */
2146 adev->ras_hw_enabled &= AMDGPU_RAS_BLOCK_MASK;
2147
2148 adev->ras_enabled = amdgpu_ras_enable == 0 ? 0 :
2149 adev->ras_hw_enabled & amdgpu_ras_mask;
2150}
2151
2152static void amdgpu_ras_counte_dw(struct work_struct *work)
2153{
2154 struct amdgpu_ras *con = container_of(work, struct amdgpu_ras,
2155 ras_counte_delay_work.work);
2156 struct amdgpu_device *adev = con->adev;
2157 struct drm_device *dev = adev_to_drm(adev);
2158 unsigned long ce_count, ue_count;
2159 int res;
2160
2161 res = pm_runtime_get_sync(dev->dev);
2162 if (res < 0)
2163 goto Out;
2164
2165 /* Cache new values.
2166 */
2167 if (amdgpu_ras_query_error_count(adev, &ce_count, &ue_count) == 0) {
2168 atomic_set(&con->ras_ce_count, ce_count);
2169 atomic_set(&con->ras_ue_count, ue_count);
2170 }
2171
2172 pm_runtime_mark_last_busy(dev->dev);
2173Out:
2174 pm_runtime_put_autosuspend(dev->dev);
2175}
2176
2177int amdgpu_ras_init(struct amdgpu_device *adev)
2178{
2179 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
2180 int r;
2181
2182 if (con)
2183 return 0;
2184
2185 con = kmalloc(sizeof(struct amdgpu_ras) +
2186 sizeof(struct ras_manager) * AMDGPU_RAS_BLOCK_COUNT,
2187 GFP_KERNEL|__GFP_ZERO);
2188 if (!con)
2189 return -ENOMEM;
2190
2191 con->adev = adev;
2192 INIT_DELAYED_WORK(&con->ras_counte_delay_work, amdgpu_ras_counte_dw);
2193 atomic_set(&con->ras_ce_count, 0);
2194 atomic_set(&con->ras_ue_count, 0);
2195
2196 con->objs = (struct ras_manager *)(con + 1);
2197
2198 amdgpu_ras_set_context(adev, con);
2199
2200 amdgpu_ras_check_supported(adev);
2201
2202 if (!adev->ras_enabled || adev->asic_type == CHIP_VEGA10) {
2203 /* set gfx block ras context feature for VEGA20 Gaming
2204 * send ras disable cmd to ras ta during ras late init.
2205 */
2206 if (!adev->ras_enabled && adev->asic_type == CHIP_VEGA20) {
2207 con->features |= BIT(AMDGPU_RAS_BLOCK__GFX);
2208
2209 return 0;
2210 }
2211
2212 r = 0;
2213 goto release_con;
2214 }
2215
2216 con->features = 0;
2217 INIT_LIST_HEAD(&con->head);
2218 /* Might need get this flag from vbios. */
2219 con->flags = RAS_DEFAULT_FLAGS;
2220
2221 /* initialize nbio ras function ahead of any other
2222 * ras functions so hardware fatal error interrupt
2223 * can be enabled as early as possible */
2224 switch (adev->asic_type) {
2225 case CHIP_VEGA20:
2226 case CHIP_ARCTURUS:
2227 case CHIP_ALDEBARAN:
2228 if (!adev->gmc.xgmi.connected_to_cpu)
2229 adev->nbio.ras_funcs = &nbio_v7_4_ras_funcs;
2230 break;
2231 default:
2232 /* nbio ras is not available */
2233 break;
2234 }
2235
2236 if (adev->nbio.ras_funcs &&
2237 adev->nbio.ras_funcs->init_ras_controller_interrupt) {
2238 r = adev->nbio.ras_funcs->init_ras_controller_interrupt(adev);
2239 if (r)
2240 goto release_con;
2241 }
2242
2243 if (adev->nbio.ras_funcs &&
2244 adev->nbio.ras_funcs->init_ras_err_event_athub_interrupt) {
2245 r = adev->nbio.ras_funcs->init_ras_err_event_athub_interrupt(adev);
2246 if (r)
2247 goto release_con;
2248 }
2249
2250 if (amdgpu_ras_fs_init(adev)) {
2251 r = -EINVAL;
2252 goto release_con;
2253 }
2254
2255 dev_info(adev->dev, "RAS INFO: ras initialized successfully, "
2256 "hardware ability[%x] ras_mask[%x]\n",
2257 adev->ras_hw_enabled, adev->ras_enabled);
2258
2259 return 0;
2260release_con:
2261 amdgpu_ras_set_context(adev, NULL);
2262 kfree(con);
2263
2264 return r;
2265}
2266
2267int amdgpu_persistent_edc_harvesting_supported(struct amdgpu_device *adev)
2268{
2269 if (adev->gmc.xgmi.connected_to_cpu)
2270 return 1;
2271 return 0;
2272}
2273
2274static int amdgpu_persistent_edc_harvesting(struct amdgpu_device *adev,
2275 struct ras_common_if *ras_block)
2276{
2277 struct ras_query_if info = {
2278 .head = *ras_block,
2279 };
2280
2281 if (!amdgpu_persistent_edc_harvesting_supported(adev))
2282 return 0;
2283
2284 if (amdgpu_ras_query_error_status(adev, &info) != 0)
2285 DRM_WARN("RAS init harvest failure");
2286
2287 if (amdgpu_ras_reset_error_status(adev, ras_block->block) != 0)
2288 DRM_WARN("RAS init harvest reset failure");
2289
2290 return 0;
2291}
2292
2293/* helper function to handle common stuff in ip late init phase */
2294int amdgpu_ras_late_init(struct amdgpu_device *adev,
2295 struct ras_common_if *ras_block,
2296 struct ras_fs_if *fs_info,
2297 struct ras_ih_if *ih_info)
2298{
2299 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
2300 unsigned long ue_count, ce_count;
2301 int r;
2302
2303 /* disable RAS feature per IP block if it is not supported */
2304 if (!amdgpu_ras_is_supported(adev, ras_block->block)) {
2305 amdgpu_ras_feature_enable_on_boot(adev, ras_block, 0);
2306 return 0;
2307 }
2308
2309 r = amdgpu_ras_feature_enable_on_boot(adev, ras_block, 1);
2310 if (r) {
2311 if (r == -EAGAIN) {
2312 /* request gpu reset. will run again */
2313 amdgpu_ras_request_reset_on_boot(adev,
2314 ras_block->block);
2315 return 0;
2316 } else if (adev->in_suspend || amdgpu_in_reset(adev)) {
2317 /* in resume phase, if fail to enable ras,
2318 * clean up all ras fs nodes, and disable ras */
2319 goto cleanup;
2320 } else
2321 return r;
2322 }
2323
2324 /* check for errors on warm reset edc persisant supported ASIC */
2325 amdgpu_persistent_edc_harvesting(adev, ras_block);
2326
2327 /* in resume phase, no need to create ras fs node */
2328 if (adev->in_suspend || amdgpu_in_reset(adev))
2329 return 0;
2330
2331 if (ih_info->cb) {
2332 r = amdgpu_ras_interrupt_add_handler(adev, ih_info);
2333 if (r)
2334 goto interrupt;
2335 }
2336
2337 r = amdgpu_ras_sysfs_create(adev, fs_info);
2338 if (r)
2339 goto sysfs;
2340
2341 /* Those are the cached values at init.
2342 */
2343 if (amdgpu_ras_query_error_count(adev, &ce_count, &ue_count) == 0) {
2344 atomic_set(&con->ras_ce_count, ce_count);
2345 atomic_set(&con->ras_ue_count, ue_count);
2346 }
2347
2348 return 0;
2349cleanup:
2350 amdgpu_ras_sysfs_remove(adev, ras_block);
2351sysfs:
2352 if (ih_info->cb)
2353 amdgpu_ras_interrupt_remove_handler(adev, ih_info);
2354interrupt:
2355 amdgpu_ras_feature_enable(adev, ras_block, 0);
2356 return r;
2357}
2358
2359/* helper function to remove ras fs node and interrupt handler */
2360void amdgpu_ras_late_fini(struct amdgpu_device *adev,
2361 struct ras_common_if *ras_block,
2362 struct ras_ih_if *ih_info)
2363{
2364 if (!ras_block || !ih_info)
2365 return;
2366
2367 amdgpu_ras_sysfs_remove(adev, ras_block);
2368 if (ih_info->cb)
2369 amdgpu_ras_interrupt_remove_handler(adev, ih_info);
2370 amdgpu_ras_feature_enable(adev, ras_block, 0);
2371}
2372
2373/* do some init work after IP late init as dependence.
2374 * and it runs in resume/gpu reset/booting up cases.
2375 */
2376void amdgpu_ras_resume(struct amdgpu_device *adev)
2377{
2378 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
2379 struct ras_manager *obj, *tmp;
2380
2381 if (!adev->ras_enabled || !con) {
2382 /* clean ras context for VEGA20 Gaming after send ras disable cmd */
2383 amdgpu_release_ras_context(adev);
2384
2385 return;
2386 }
2387
2388 if (con->flags & AMDGPU_RAS_FLAG_INIT_BY_VBIOS) {
2389 /* Set up all other IPs which are not implemented. There is a
2390 * tricky thing that IP's actual ras error type should be
2391 * MULTI_UNCORRECTABLE, but as driver does not handle it, so
2392 * ERROR_NONE make sense anyway.
2393 */
2394 amdgpu_ras_enable_all_features(adev, 1);
2395
2396 /* We enable ras on all hw_supported block, but as boot
2397 * parameter might disable some of them and one or more IP has
2398 * not implemented yet. So we disable them on behalf.
2399 */
2400 list_for_each_entry_safe(obj, tmp, &con->head, node) {
2401 if (!amdgpu_ras_is_supported(adev, obj->head.block)) {
2402 amdgpu_ras_feature_enable(adev, &obj->head, 0);
2403 /* there should be no any reference. */
2404 WARN_ON(alive_obj(obj));
2405 }
2406 }
2407 }
2408
2409 if (con->flags & AMDGPU_RAS_FLAG_INIT_NEED_RESET) {
2410 con->flags &= ~AMDGPU_RAS_FLAG_INIT_NEED_RESET;
2411 /* setup ras obj state as disabled.
2412 * for init_by_vbios case.
2413 * if we want to enable ras, just enable it in a normal way.
2414 * If we want do disable it, need setup ras obj as enabled,
2415 * then issue another TA disable cmd.
2416 * See feature_enable_on_boot
2417 */
2418 amdgpu_ras_disable_all_features(adev, 1);
2419 amdgpu_ras_reset_gpu(adev);
2420 }
2421}
2422
2423void amdgpu_ras_suspend(struct amdgpu_device *adev)
2424{
2425 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
2426
2427 if (!adev->ras_enabled || !con)
2428 return;
2429
2430 amdgpu_ras_disable_all_features(adev, 0);
2431 /* Make sure all ras objects are disabled. */
2432 if (con->features)
2433 amdgpu_ras_disable_all_features(adev, 1);
2434}
2435
2436/* do some fini work before IP fini as dependence */
2437int amdgpu_ras_pre_fini(struct amdgpu_device *adev)
2438{
2439 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
2440
2441 if (!adev->ras_enabled || !con)
2442 return 0;
2443
2444
2445 /* Need disable ras on all IPs here before ip [hw/sw]fini */
2446 amdgpu_ras_disable_all_features(adev, 0);
2447 amdgpu_ras_recovery_fini(adev);
2448 return 0;
2449}
2450
2451int amdgpu_ras_fini(struct amdgpu_device *adev)
2452{
2453 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
2454
2455 if (!adev->ras_enabled || !con)
2456 return 0;
2457
2458 amdgpu_ras_fs_fini(adev);
2459 amdgpu_ras_interrupt_remove_all(adev);
2460
2461 WARN(con->features, "Feature mask is not cleared");
2462
2463 if (con->features)
2464 amdgpu_ras_disable_all_features(adev, 1);
2465
2466 cancel_delayed_work_sync(&con->ras_counte_delay_work);
2467
2468 amdgpu_ras_set_context(adev, NULL);
2469 kfree(con);
2470
2471 return 0;
2472}
2473
2474void amdgpu_ras_global_ras_isr(struct amdgpu_device *adev)
2475{
2476 amdgpu_ras_check_supported(adev);
2477 if (!adev->ras_hw_enabled)
2478 return;
2479
2480 if (atomic_cmpxchg(&amdgpu_ras_in_intr, 0, 1) == 0) {
2481 dev_info(adev->dev, "uncorrectable hardware error"
2482 "(ERREVENT_ATHUB_INTERRUPT) detected!\n");
2483
2484 amdgpu_ras_reset_gpu(adev);
2485 }
2486}
2487
2488bool amdgpu_ras_need_emergency_restart(struct amdgpu_device *adev)
2489{
2490 if (adev->asic_type == CHIP_VEGA20 &&
2491 adev->pm.fw_version <= 0x283400) {
2492 return !(amdgpu_asic_reset_method(adev) == AMD_RESET_METHOD_BACO) &&
2493 amdgpu_ras_intr_triggered();
2494 }
2495
2496 return false;
2497}
2498
2499void amdgpu_release_ras_context(struct amdgpu_device *adev)
2500{
2501 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
2502
2503 if (!con)
2504 return;
2505
2506 if (!adev->ras_enabled && con->features & BIT(AMDGPU_RAS_BLOCK__GFX)) {
2507 con->features &= ~BIT(AMDGPU_RAS_BLOCK__GFX);
2508 amdgpu_ras_set_context(adev, NULL);
2509 kfree(con);
2510 }
2511}