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1/*
2 * Copyright (c) 2008 Intel Corporation
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 (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 * Authors:
24 * Eric Anholt <eric@anholt.net>
25 * Keith Packard <keithp@keithp.com>
26 * Mika Kuoppala <mika.kuoppala@intel.com>
27 *
28 */
29
30#include <generated/utsrelease.h>
31#include "i915_drv.h"
32
33static const char *ring_str(int ring)
34{
35 switch (ring) {
36 case RCS: return "render";
37 case VCS: return "bsd";
38 case BCS: return "blt";
39 case VECS: return "vebox";
40 case VCS2: return "bsd2";
41 default: return "";
42 }
43}
44
45static const char *pin_flag(int pinned)
46{
47 if (pinned > 0)
48 return " P";
49 else if (pinned < 0)
50 return " p";
51 else
52 return "";
53}
54
55static const char *tiling_flag(int tiling)
56{
57 switch (tiling) {
58 default:
59 case I915_TILING_NONE: return "";
60 case I915_TILING_X: return " X";
61 case I915_TILING_Y: return " Y";
62 }
63}
64
65static const char *dirty_flag(int dirty)
66{
67 return dirty ? " dirty" : "";
68}
69
70static const char *purgeable_flag(int purgeable)
71{
72 return purgeable ? " purgeable" : "";
73}
74
75static bool __i915_error_ok(struct drm_i915_error_state_buf *e)
76{
77
78 if (!e->err && WARN(e->bytes > (e->size - 1), "overflow")) {
79 e->err = -ENOSPC;
80 return false;
81 }
82
83 if (e->bytes == e->size - 1 || e->err)
84 return false;
85
86 return true;
87}
88
89static bool __i915_error_seek(struct drm_i915_error_state_buf *e,
90 unsigned len)
91{
92 if (e->pos + len <= e->start) {
93 e->pos += len;
94 return false;
95 }
96
97 /* First vsnprintf needs to fit in its entirety for memmove */
98 if (len >= e->size) {
99 e->err = -EIO;
100 return false;
101 }
102
103 return true;
104}
105
106static void __i915_error_advance(struct drm_i915_error_state_buf *e,
107 unsigned len)
108{
109 /* If this is first printf in this window, adjust it so that
110 * start position matches start of the buffer
111 */
112
113 if (e->pos < e->start) {
114 const size_t off = e->start - e->pos;
115
116 /* Should not happen but be paranoid */
117 if (off > len || e->bytes) {
118 e->err = -EIO;
119 return;
120 }
121
122 memmove(e->buf, e->buf + off, len - off);
123 e->bytes = len - off;
124 e->pos = e->start;
125 return;
126 }
127
128 e->bytes += len;
129 e->pos += len;
130}
131
132static void i915_error_vprintf(struct drm_i915_error_state_buf *e,
133 const char *f, va_list args)
134{
135 unsigned len;
136
137 if (!__i915_error_ok(e))
138 return;
139
140 /* Seek the first printf which is hits start position */
141 if (e->pos < e->start) {
142 va_list tmp;
143
144 va_copy(tmp, args);
145 len = vsnprintf(NULL, 0, f, tmp);
146 va_end(tmp);
147
148 if (!__i915_error_seek(e, len))
149 return;
150 }
151
152 len = vsnprintf(e->buf + e->bytes, e->size - e->bytes, f, args);
153 if (len >= e->size - e->bytes)
154 len = e->size - e->bytes - 1;
155
156 __i915_error_advance(e, len);
157}
158
159static void i915_error_puts(struct drm_i915_error_state_buf *e,
160 const char *str)
161{
162 unsigned len;
163
164 if (!__i915_error_ok(e))
165 return;
166
167 len = strlen(str);
168
169 /* Seek the first printf which is hits start position */
170 if (e->pos < e->start) {
171 if (!__i915_error_seek(e, len))
172 return;
173 }
174
175 if (len >= e->size - e->bytes)
176 len = e->size - e->bytes - 1;
177 memcpy(e->buf + e->bytes, str, len);
178
179 __i915_error_advance(e, len);
180}
181
182#define err_printf(e, ...) i915_error_printf(e, __VA_ARGS__)
183#define err_puts(e, s) i915_error_puts(e, s)
184
185static void print_error_buffers(struct drm_i915_error_state_buf *m,
186 const char *name,
187 struct drm_i915_error_buffer *err,
188 int count)
189{
190 int i;
191
192 err_printf(m, " %s [%d]:\n", name, count);
193
194 while (count--) {
195 err_printf(m, " %08x_%08x %8u %02x %02x [ ",
196 upper_32_bits(err->gtt_offset),
197 lower_32_bits(err->gtt_offset),
198 err->size,
199 err->read_domains,
200 err->write_domain);
201 for (i = 0; i < I915_NUM_RINGS; i++)
202 err_printf(m, "%02x ", err->rseqno[i]);
203
204 err_printf(m, "] %02x", err->wseqno);
205 err_puts(m, pin_flag(err->pinned));
206 err_puts(m, tiling_flag(err->tiling));
207 err_puts(m, dirty_flag(err->dirty));
208 err_puts(m, purgeable_flag(err->purgeable));
209 err_puts(m, err->userptr ? " userptr" : "");
210 err_puts(m, err->ring != -1 ? " " : "");
211 err_puts(m, ring_str(err->ring));
212 err_puts(m, i915_cache_level_str(m->i915, err->cache_level));
213
214 if (err->name)
215 err_printf(m, " (name: %d)", err->name);
216 if (err->fence_reg != I915_FENCE_REG_NONE)
217 err_printf(m, " (fence: %d)", err->fence_reg);
218
219 err_puts(m, "\n");
220 err++;
221 }
222}
223
224static const char *hangcheck_action_to_str(enum intel_ring_hangcheck_action a)
225{
226 switch (a) {
227 case HANGCHECK_IDLE:
228 return "idle";
229 case HANGCHECK_WAIT:
230 return "wait";
231 case HANGCHECK_ACTIVE:
232 return "active";
233 case HANGCHECK_ACTIVE_LOOP:
234 return "active (loop)";
235 case HANGCHECK_KICK:
236 return "kick";
237 case HANGCHECK_HUNG:
238 return "hung";
239 }
240
241 return "unknown";
242}
243
244static void i915_ring_error_state(struct drm_i915_error_state_buf *m,
245 struct drm_device *dev,
246 struct drm_i915_error_state *error,
247 int ring_idx)
248{
249 struct drm_i915_error_ring *ring = &error->ring[ring_idx];
250
251 if (!ring->valid)
252 return;
253
254 err_printf(m, "%s command stream:\n", ring_str(ring_idx));
255 err_printf(m, " START: 0x%08x\n", ring->start);
256 err_printf(m, " HEAD: 0x%08x\n", ring->head);
257 err_printf(m, " TAIL: 0x%08x\n", ring->tail);
258 err_printf(m, " CTL: 0x%08x\n", ring->ctl);
259 err_printf(m, " HWS: 0x%08x\n", ring->hws);
260 err_printf(m, " ACTHD: 0x%08x %08x\n", (u32)(ring->acthd>>32), (u32)ring->acthd);
261 err_printf(m, " IPEIR: 0x%08x\n", ring->ipeir);
262 err_printf(m, " IPEHR: 0x%08x\n", ring->ipehr);
263 err_printf(m, " INSTDONE: 0x%08x\n", ring->instdone);
264 if (INTEL_INFO(dev)->gen >= 4) {
265 err_printf(m, " BBADDR: 0x%08x %08x\n", (u32)(ring->bbaddr>>32), (u32)ring->bbaddr);
266 err_printf(m, " BB_STATE: 0x%08x\n", ring->bbstate);
267 err_printf(m, " INSTPS: 0x%08x\n", ring->instps);
268 }
269 err_printf(m, " INSTPM: 0x%08x\n", ring->instpm);
270 err_printf(m, " FADDR: 0x%08x %08x\n", upper_32_bits(ring->faddr),
271 lower_32_bits(ring->faddr));
272 if (INTEL_INFO(dev)->gen >= 6) {
273 err_printf(m, " RC PSMI: 0x%08x\n", ring->rc_psmi);
274 err_printf(m, " FAULT_REG: 0x%08x\n", ring->fault_reg);
275 err_printf(m, " SYNC_0: 0x%08x [last synced 0x%08x]\n",
276 ring->semaphore_mboxes[0],
277 ring->semaphore_seqno[0]);
278 err_printf(m, " SYNC_1: 0x%08x [last synced 0x%08x]\n",
279 ring->semaphore_mboxes[1],
280 ring->semaphore_seqno[1]);
281 if (HAS_VEBOX(dev)) {
282 err_printf(m, " SYNC_2: 0x%08x [last synced 0x%08x]\n",
283 ring->semaphore_mboxes[2],
284 ring->semaphore_seqno[2]);
285 }
286 }
287 if (USES_PPGTT(dev)) {
288 err_printf(m, " GFX_MODE: 0x%08x\n", ring->vm_info.gfx_mode);
289
290 if (INTEL_INFO(dev)->gen >= 8) {
291 int i;
292 for (i = 0; i < 4; i++)
293 err_printf(m, " PDP%d: 0x%016llx\n",
294 i, ring->vm_info.pdp[i]);
295 } else {
296 err_printf(m, " PP_DIR_BASE: 0x%08x\n",
297 ring->vm_info.pp_dir_base);
298 }
299 }
300 err_printf(m, " seqno: 0x%08x\n", ring->seqno);
301 err_printf(m, " waiting: %s\n", yesno(ring->waiting));
302 err_printf(m, " ring->head: 0x%08x\n", ring->cpu_ring_head);
303 err_printf(m, " ring->tail: 0x%08x\n", ring->cpu_ring_tail);
304 err_printf(m, " hangcheck: %s [%d]\n",
305 hangcheck_action_to_str(ring->hangcheck_action),
306 ring->hangcheck_score);
307}
308
309void i915_error_printf(struct drm_i915_error_state_buf *e, const char *f, ...)
310{
311 va_list args;
312
313 va_start(args, f);
314 i915_error_vprintf(e, f, args);
315 va_end(args);
316}
317
318static void print_error_obj(struct drm_i915_error_state_buf *m,
319 struct drm_i915_error_object *obj)
320{
321 int page, offset, elt;
322
323 for (page = offset = 0; page < obj->page_count; page++) {
324 for (elt = 0; elt < PAGE_SIZE/4; elt++) {
325 err_printf(m, "%08x : %08x\n", offset,
326 obj->pages[page][elt]);
327 offset += 4;
328 }
329 }
330}
331
332int i915_error_state_to_str(struct drm_i915_error_state_buf *m,
333 const struct i915_error_state_file_priv *error_priv)
334{
335 struct drm_device *dev = error_priv->dev;
336 struct drm_i915_private *dev_priv = dev->dev_private;
337 struct drm_i915_error_state *error = error_priv->error;
338 struct drm_i915_error_object *obj;
339 int i, j, offset, elt;
340 int max_hangcheck_score;
341
342 if (!error) {
343 err_printf(m, "no error state collected\n");
344 goto out;
345 }
346
347 err_printf(m, "%s\n", error->error_msg);
348 err_printf(m, "Time: %ld s %ld us\n", error->time.tv_sec,
349 error->time.tv_usec);
350 err_printf(m, "Kernel: " UTS_RELEASE "\n");
351 max_hangcheck_score = 0;
352 for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
353 if (error->ring[i].hangcheck_score > max_hangcheck_score)
354 max_hangcheck_score = error->ring[i].hangcheck_score;
355 }
356 for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
357 if (error->ring[i].hangcheck_score == max_hangcheck_score &&
358 error->ring[i].pid != -1) {
359 err_printf(m, "Active process (on ring %s): %s [%d]\n",
360 ring_str(i),
361 error->ring[i].comm,
362 error->ring[i].pid);
363 }
364 }
365 err_printf(m, "Reset count: %u\n", error->reset_count);
366 err_printf(m, "Suspend count: %u\n", error->suspend_count);
367 err_printf(m, "PCI ID: 0x%04x\n", dev->pdev->device);
368 err_printf(m, "PCI Revision: 0x%02x\n", dev->pdev->revision);
369 err_printf(m, "PCI Subsystem: %04x:%04x\n",
370 dev->pdev->subsystem_vendor,
371 dev->pdev->subsystem_device);
372 err_printf(m, "IOMMU enabled?: %d\n", error->iommu);
373
374 if (HAS_CSR(dev)) {
375 struct intel_csr *csr = &dev_priv->csr;
376
377 err_printf(m, "DMC loaded: %s\n",
378 yesno(csr->dmc_payload != NULL));
379 err_printf(m, "DMC fw version: %d.%d\n",
380 CSR_VERSION_MAJOR(csr->version),
381 CSR_VERSION_MINOR(csr->version));
382 }
383
384 err_printf(m, "EIR: 0x%08x\n", error->eir);
385 err_printf(m, "IER: 0x%08x\n", error->ier);
386 if (INTEL_INFO(dev)->gen >= 8) {
387 for (i = 0; i < 4; i++)
388 err_printf(m, "GTIER gt %d: 0x%08x\n", i,
389 error->gtier[i]);
390 } else if (HAS_PCH_SPLIT(dev) || IS_VALLEYVIEW(dev))
391 err_printf(m, "GTIER: 0x%08x\n", error->gtier[0]);
392 err_printf(m, "PGTBL_ER: 0x%08x\n", error->pgtbl_er);
393 err_printf(m, "FORCEWAKE: 0x%08x\n", error->forcewake);
394 err_printf(m, "DERRMR: 0x%08x\n", error->derrmr);
395 err_printf(m, "CCID: 0x%08x\n", error->ccid);
396 err_printf(m, "Missed interrupts: 0x%08lx\n", dev_priv->gpu_error.missed_irq_rings);
397
398 for (i = 0; i < dev_priv->num_fence_regs; i++)
399 err_printf(m, " fence[%d] = %08llx\n", i, error->fence[i]);
400
401 for (i = 0; i < ARRAY_SIZE(error->extra_instdone); i++)
402 err_printf(m, " INSTDONE_%d: 0x%08x\n", i,
403 error->extra_instdone[i]);
404
405 if (INTEL_INFO(dev)->gen >= 6) {
406 err_printf(m, "ERROR: 0x%08x\n", error->error);
407
408 if (INTEL_INFO(dev)->gen >= 8)
409 err_printf(m, "FAULT_TLB_DATA: 0x%08x 0x%08x\n",
410 error->fault_data1, error->fault_data0);
411
412 err_printf(m, "DONE_REG: 0x%08x\n", error->done_reg);
413 }
414
415 if (INTEL_INFO(dev)->gen == 7)
416 err_printf(m, "ERR_INT: 0x%08x\n", error->err_int);
417
418 for (i = 0; i < ARRAY_SIZE(error->ring); i++)
419 i915_ring_error_state(m, dev, error, i);
420
421 for (i = 0; i < error->vm_count; i++) {
422 err_printf(m, "vm[%d]\n", i);
423
424 print_error_buffers(m, "Active",
425 error->active_bo[i],
426 error->active_bo_count[i]);
427
428 print_error_buffers(m, "Pinned",
429 error->pinned_bo[i],
430 error->pinned_bo_count[i]);
431 }
432
433 for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
434 obj = error->ring[i].batchbuffer;
435 if (obj) {
436 err_puts(m, dev_priv->ring[i].name);
437 if (error->ring[i].pid != -1)
438 err_printf(m, " (submitted by %s [%d])",
439 error->ring[i].comm,
440 error->ring[i].pid);
441 err_printf(m, " --- gtt_offset = 0x%08x %08x\n",
442 upper_32_bits(obj->gtt_offset),
443 lower_32_bits(obj->gtt_offset));
444 print_error_obj(m, obj);
445 }
446
447 obj = error->ring[i].wa_batchbuffer;
448 if (obj) {
449 err_printf(m, "%s (w/a) --- gtt_offset = 0x%08x\n",
450 dev_priv->ring[i].name,
451 lower_32_bits(obj->gtt_offset));
452 print_error_obj(m, obj);
453 }
454
455 if (error->ring[i].num_requests) {
456 err_printf(m, "%s --- %d requests\n",
457 dev_priv->ring[i].name,
458 error->ring[i].num_requests);
459 for (j = 0; j < error->ring[i].num_requests; j++) {
460 err_printf(m, " seqno 0x%08x, emitted %ld, tail 0x%08x\n",
461 error->ring[i].requests[j].seqno,
462 error->ring[i].requests[j].jiffies,
463 error->ring[i].requests[j].tail);
464 }
465 }
466
467 if ((obj = error->ring[i].ringbuffer)) {
468 err_printf(m, "%s --- ringbuffer = 0x%08x\n",
469 dev_priv->ring[i].name,
470 lower_32_bits(obj->gtt_offset));
471 print_error_obj(m, obj);
472 }
473
474 if ((obj = error->ring[i].hws_page)) {
475 u64 hws_offset = obj->gtt_offset;
476 u32 *hws_page = &obj->pages[0][0];
477
478 if (i915.enable_execlists) {
479 hws_offset += LRC_PPHWSP_PN * PAGE_SIZE;
480 hws_page = &obj->pages[LRC_PPHWSP_PN][0];
481 }
482 err_printf(m, "%s --- HW Status = 0x%08llx\n",
483 dev_priv->ring[i].name, hws_offset);
484 offset = 0;
485 for (elt = 0; elt < PAGE_SIZE/16; elt += 4) {
486 err_printf(m, "[%04x] %08x %08x %08x %08x\n",
487 offset,
488 hws_page[elt],
489 hws_page[elt+1],
490 hws_page[elt+2],
491 hws_page[elt+3]);
492 offset += 16;
493 }
494 }
495
496 if ((obj = error->ring[i].ctx)) {
497 err_printf(m, "%s --- HW Context = 0x%08x\n",
498 dev_priv->ring[i].name,
499 lower_32_bits(obj->gtt_offset));
500 print_error_obj(m, obj);
501 }
502 }
503
504 if ((obj = error->semaphore_obj)) {
505 err_printf(m, "Semaphore page = 0x%08x\n",
506 lower_32_bits(obj->gtt_offset));
507 for (elt = 0; elt < PAGE_SIZE/16; elt += 4) {
508 err_printf(m, "[%04x] %08x %08x %08x %08x\n",
509 elt * 4,
510 obj->pages[0][elt],
511 obj->pages[0][elt+1],
512 obj->pages[0][elt+2],
513 obj->pages[0][elt+3]);
514 }
515 }
516
517 if (error->overlay)
518 intel_overlay_print_error_state(m, error->overlay);
519
520 if (error->display)
521 intel_display_print_error_state(m, dev, error->display);
522
523out:
524 if (m->bytes == 0 && m->err)
525 return m->err;
526
527 return 0;
528}
529
530int i915_error_state_buf_init(struct drm_i915_error_state_buf *ebuf,
531 struct drm_i915_private *i915,
532 size_t count, loff_t pos)
533{
534 memset(ebuf, 0, sizeof(*ebuf));
535 ebuf->i915 = i915;
536
537 /* We need to have enough room to store any i915_error_state printf
538 * so that we can move it to start position.
539 */
540 ebuf->size = count + 1 > PAGE_SIZE ? count + 1 : PAGE_SIZE;
541 ebuf->buf = kmalloc(ebuf->size,
542 GFP_TEMPORARY | __GFP_NORETRY | __GFP_NOWARN);
543
544 if (ebuf->buf == NULL) {
545 ebuf->size = PAGE_SIZE;
546 ebuf->buf = kmalloc(ebuf->size, GFP_TEMPORARY);
547 }
548
549 if (ebuf->buf == NULL) {
550 ebuf->size = 128;
551 ebuf->buf = kmalloc(ebuf->size, GFP_TEMPORARY);
552 }
553
554 if (ebuf->buf == NULL)
555 return -ENOMEM;
556
557 ebuf->start = pos;
558
559 return 0;
560}
561
562static void i915_error_object_free(struct drm_i915_error_object *obj)
563{
564 int page;
565
566 if (obj == NULL)
567 return;
568
569 for (page = 0; page < obj->page_count; page++)
570 kfree(obj->pages[page]);
571
572 kfree(obj);
573}
574
575static void i915_error_state_free(struct kref *error_ref)
576{
577 struct drm_i915_error_state *error = container_of(error_ref,
578 typeof(*error), ref);
579 int i;
580
581 for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
582 i915_error_object_free(error->ring[i].batchbuffer);
583 i915_error_object_free(error->ring[i].wa_batchbuffer);
584 i915_error_object_free(error->ring[i].ringbuffer);
585 i915_error_object_free(error->ring[i].hws_page);
586 i915_error_object_free(error->ring[i].ctx);
587 kfree(error->ring[i].requests);
588 }
589
590 i915_error_object_free(error->semaphore_obj);
591
592 for (i = 0; i < error->vm_count; i++)
593 kfree(error->active_bo[i]);
594
595 kfree(error->active_bo);
596 kfree(error->active_bo_count);
597 kfree(error->pinned_bo);
598 kfree(error->pinned_bo_count);
599 kfree(error->overlay);
600 kfree(error->display);
601 kfree(error);
602}
603
604static struct drm_i915_error_object *
605i915_error_object_create(struct drm_i915_private *dev_priv,
606 struct drm_i915_gem_object *src,
607 struct i915_address_space *vm)
608{
609 struct drm_i915_error_object *dst;
610 struct i915_vma *vma = NULL;
611 int num_pages;
612 bool use_ggtt;
613 int i = 0;
614 u64 reloc_offset;
615
616 if (src == NULL || src->pages == NULL)
617 return NULL;
618
619 num_pages = src->base.size >> PAGE_SHIFT;
620
621 dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *), GFP_ATOMIC);
622 if (dst == NULL)
623 return NULL;
624
625 if (i915_gem_obj_bound(src, vm))
626 dst->gtt_offset = i915_gem_obj_offset(src, vm);
627 else
628 dst->gtt_offset = -1;
629
630 reloc_offset = dst->gtt_offset;
631 if (i915_is_ggtt(vm))
632 vma = i915_gem_obj_to_ggtt(src);
633 use_ggtt = (src->cache_level == I915_CACHE_NONE &&
634 vma && (vma->bound & GLOBAL_BIND) &&
635 reloc_offset + num_pages * PAGE_SIZE <= dev_priv->gtt.mappable_end);
636
637 /* Cannot access stolen address directly, try to use the aperture */
638 if (src->stolen) {
639 use_ggtt = true;
640
641 if (!(vma && vma->bound & GLOBAL_BIND))
642 goto unwind;
643
644 reloc_offset = i915_gem_obj_ggtt_offset(src);
645 if (reloc_offset + num_pages * PAGE_SIZE > dev_priv->gtt.mappable_end)
646 goto unwind;
647 }
648
649 /* Cannot access snooped pages through the aperture */
650 if (use_ggtt && src->cache_level != I915_CACHE_NONE && !HAS_LLC(dev_priv->dev))
651 goto unwind;
652
653 dst->page_count = num_pages;
654 while (num_pages--) {
655 unsigned long flags;
656 void *d;
657
658 d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
659 if (d == NULL)
660 goto unwind;
661
662 local_irq_save(flags);
663 if (use_ggtt) {
664 void __iomem *s;
665
666 /* Simply ignore tiling or any overlapping fence.
667 * It's part of the error state, and this hopefully
668 * captures what the GPU read.
669 */
670
671 s = io_mapping_map_atomic_wc(dev_priv->gtt.mappable,
672 reloc_offset);
673 memcpy_fromio(d, s, PAGE_SIZE);
674 io_mapping_unmap_atomic(s);
675 } else {
676 struct page *page;
677 void *s;
678
679 page = i915_gem_object_get_page(src, i);
680
681 drm_clflush_pages(&page, 1);
682
683 s = kmap_atomic(page);
684 memcpy(d, s, PAGE_SIZE);
685 kunmap_atomic(s);
686
687 drm_clflush_pages(&page, 1);
688 }
689 local_irq_restore(flags);
690
691 dst->pages[i++] = d;
692 reloc_offset += PAGE_SIZE;
693 }
694
695 return dst;
696
697unwind:
698 while (i--)
699 kfree(dst->pages[i]);
700 kfree(dst);
701 return NULL;
702}
703#define i915_error_ggtt_object_create(dev_priv, src) \
704 i915_error_object_create((dev_priv), (src), &(dev_priv)->gtt.base)
705
706static void capture_bo(struct drm_i915_error_buffer *err,
707 struct i915_vma *vma)
708{
709 struct drm_i915_gem_object *obj = vma->obj;
710 int i;
711
712 err->size = obj->base.size;
713 err->name = obj->base.name;
714 for (i = 0; i < I915_NUM_RINGS; i++)
715 err->rseqno[i] = i915_gem_request_get_seqno(obj->last_read_req[i]);
716 err->wseqno = i915_gem_request_get_seqno(obj->last_write_req);
717 err->gtt_offset = vma->node.start;
718 err->read_domains = obj->base.read_domains;
719 err->write_domain = obj->base.write_domain;
720 err->fence_reg = obj->fence_reg;
721 err->pinned = 0;
722 if (i915_gem_obj_is_pinned(obj))
723 err->pinned = 1;
724 err->tiling = obj->tiling_mode;
725 err->dirty = obj->dirty;
726 err->purgeable = obj->madv != I915_MADV_WILLNEED;
727 err->userptr = obj->userptr.mm != NULL;
728 err->ring = obj->last_write_req ?
729 i915_gem_request_get_ring(obj->last_write_req)->id : -1;
730 err->cache_level = obj->cache_level;
731}
732
733static u32 capture_active_bo(struct drm_i915_error_buffer *err,
734 int count, struct list_head *head)
735{
736 struct i915_vma *vma;
737 int i = 0;
738
739 list_for_each_entry(vma, head, vm_link) {
740 capture_bo(err++, vma);
741 if (++i == count)
742 break;
743 }
744
745 return i;
746}
747
748static u32 capture_pinned_bo(struct drm_i915_error_buffer *err,
749 int count, struct list_head *head,
750 struct i915_address_space *vm)
751{
752 struct drm_i915_gem_object *obj;
753 struct drm_i915_error_buffer * const first = err;
754 struct drm_i915_error_buffer * const last = err + count;
755
756 list_for_each_entry(obj, head, global_list) {
757 struct i915_vma *vma;
758
759 if (err == last)
760 break;
761
762 list_for_each_entry(vma, &obj->vma_list, obj_link)
763 if (vma->vm == vm && vma->pin_count > 0)
764 capture_bo(err++, vma);
765 }
766
767 return err - first;
768}
769
770/* Generate a semi-unique error code. The code is not meant to have meaning, The
771 * code's only purpose is to try to prevent false duplicated bug reports by
772 * grossly estimating a GPU error state.
773 *
774 * TODO Ideally, hashing the batchbuffer would be a very nice way to determine
775 * the hang if we could strip the GTT offset information from it.
776 *
777 * It's only a small step better than a random number in its current form.
778 */
779static uint32_t i915_error_generate_code(struct drm_i915_private *dev_priv,
780 struct drm_i915_error_state *error,
781 int *ring_id)
782{
783 uint32_t error_code = 0;
784 int i;
785
786 /* IPEHR would be an ideal way to detect errors, as it's the gross
787 * measure of "the command that hung." However, has some very common
788 * synchronization commands which almost always appear in the case
789 * strictly a client bug. Use instdone to differentiate those some.
790 */
791 for (i = 0; i < I915_NUM_RINGS; i++) {
792 if (error->ring[i].hangcheck_action == HANGCHECK_HUNG) {
793 if (ring_id)
794 *ring_id = i;
795
796 return error->ring[i].ipehr ^ error->ring[i].instdone;
797 }
798 }
799
800 return error_code;
801}
802
803static void i915_gem_record_fences(struct drm_device *dev,
804 struct drm_i915_error_state *error)
805{
806 struct drm_i915_private *dev_priv = dev->dev_private;
807 int i;
808
809 if (IS_GEN3(dev) || IS_GEN2(dev)) {
810 for (i = 0; i < dev_priv->num_fence_regs; i++)
811 error->fence[i] = I915_READ(FENCE_REG(i));
812 } else if (IS_GEN5(dev) || IS_GEN4(dev)) {
813 for (i = 0; i < dev_priv->num_fence_regs; i++)
814 error->fence[i] = I915_READ64(FENCE_REG_965_LO(i));
815 } else if (INTEL_INFO(dev)->gen >= 6) {
816 for (i = 0; i < dev_priv->num_fence_regs; i++)
817 error->fence[i] = I915_READ64(FENCE_REG_GEN6_LO(i));
818 }
819}
820
821
822static void gen8_record_semaphore_state(struct drm_i915_private *dev_priv,
823 struct drm_i915_error_state *error,
824 struct intel_engine_cs *ring,
825 struct drm_i915_error_ring *ering)
826{
827 struct intel_engine_cs *to;
828 int i;
829
830 if (!i915_semaphore_is_enabled(dev_priv->dev))
831 return;
832
833 if (!error->semaphore_obj)
834 error->semaphore_obj =
835 i915_error_ggtt_object_create(dev_priv,
836 dev_priv->semaphore_obj);
837
838 for_each_ring(to, dev_priv, i) {
839 int idx;
840 u16 signal_offset;
841 u32 *tmp;
842
843 if (ring == to)
844 continue;
845
846 signal_offset = (GEN8_SIGNAL_OFFSET(ring, i) & (PAGE_SIZE - 1))
847 / 4;
848 tmp = error->semaphore_obj->pages[0];
849 idx = intel_ring_sync_index(ring, to);
850
851 ering->semaphore_mboxes[idx] = tmp[signal_offset];
852 ering->semaphore_seqno[idx] = ring->semaphore.sync_seqno[idx];
853 }
854}
855
856static void gen6_record_semaphore_state(struct drm_i915_private *dev_priv,
857 struct intel_engine_cs *ring,
858 struct drm_i915_error_ring *ering)
859{
860 ering->semaphore_mboxes[0] = I915_READ(RING_SYNC_0(ring->mmio_base));
861 ering->semaphore_mboxes[1] = I915_READ(RING_SYNC_1(ring->mmio_base));
862 ering->semaphore_seqno[0] = ring->semaphore.sync_seqno[0];
863 ering->semaphore_seqno[1] = ring->semaphore.sync_seqno[1];
864
865 if (HAS_VEBOX(dev_priv->dev)) {
866 ering->semaphore_mboxes[2] =
867 I915_READ(RING_SYNC_2(ring->mmio_base));
868 ering->semaphore_seqno[2] = ring->semaphore.sync_seqno[2];
869 }
870}
871
872static void i915_record_ring_state(struct drm_device *dev,
873 struct drm_i915_error_state *error,
874 struct intel_engine_cs *ring,
875 struct drm_i915_error_ring *ering)
876{
877 struct drm_i915_private *dev_priv = dev->dev_private;
878
879 if (INTEL_INFO(dev)->gen >= 6) {
880 ering->rc_psmi = I915_READ(RING_PSMI_CTL(ring->mmio_base));
881 ering->fault_reg = I915_READ(RING_FAULT_REG(ring));
882 if (INTEL_INFO(dev)->gen >= 8)
883 gen8_record_semaphore_state(dev_priv, error, ring, ering);
884 else
885 gen6_record_semaphore_state(dev_priv, ring, ering);
886 }
887
888 if (INTEL_INFO(dev)->gen >= 4) {
889 ering->faddr = I915_READ(RING_DMA_FADD(ring->mmio_base));
890 ering->ipeir = I915_READ(RING_IPEIR(ring->mmio_base));
891 ering->ipehr = I915_READ(RING_IPEHR(ring->mmio_base));
892 ering->instdone = I915_READ(RING_INSTDONE(ring->mmio_base));
893 ering->instps = I915_READ(RING_INSTPS(ring->mmio_base));
894 ering->bbaddr = I915_READ(RING_BBADDR(ring->mmio_base));
895 if (INTEL_INFO(dev)->gen >= 8) {
896 ering->faddr |= (u64) I915_READ(RING_DMA_FADD_UDW(ring->mmio_base)) << 32;
897 ering->bbaddr |= (u64) I915_READ(RING_BBADDR_UDW(ring->mmio_base)) << 32;
898 }
899 ering->bbstate = I915_READ(RING_BBSTATE(ring->mmio_base));
900 } else {
901 ering->faddr = I915_READ(DMA_FADD_I8XX);
902 ering->ipeir = I915_READ(IPEIR);
903 ering->ipehr = I915_READ(IPEHR);
904 ering->instdone = I915_READ(GEN2_INSTDONE);
905 }
906
907 ering->waiting = waitqueue_active(&ring->irq_queue);
908 ering->instpm = I915_READ(RING_INSTPM(ring->mmio_base));
909 ering->seqno = ring->get_seqno(ring, false);
910 ering->acthd = intel_ring_get_active_head(ring);
911 ering->start = I915_READ_START(ring);
912 ering->head = I915_READ_HEAD(ring);
913 ering->tail = I915_READ_TAIL(ring);
914 ering->ctl = I915_READ_CTL(ring);
915
916 if (I915_NEED_GFX_HWS(dev)) {
917 i915_reg_t mmio;
918
919 if (IS_GEN7(dev)) {
920 switch (ring->id) {
921 default:
922 case RCS:
923 mmio = RENDER_HWS_PGA_GEN7;
924 break;
925 case BCS:
926 mmio = BLT_HWS_PGA_GEN7;
927 break;
928 case VCS:
929 mmio = BSD_HWS_PGA_GEN7;
930 break;
931 case VECS:
932 mmio = VEBOX_HWS_PGA_GEN7;
933 break;
934 }
935 } else if (IS_GEN6(ring->dev)) {
936 mmio = RING_HWS_PGA_GEN6(ring->mmio_base);
937 } else {
938 /* XXX: gen8 returns to sanity */
939 mmio = RING_HWS_PGA(ring->mmio_base);
940 }
941
942 ering->hws = I915_READ(mmio);
943 }
944
945 ering->hangcheck_score = ring->hangcheck.score;
946 ering->hangcheck_action = ring->hangcheck.action;
947
948 if (USES_PPGTT(dev)) {
949 int i;
950
951 ering->vm_info.gfx_mode = I915_READ(RING_MODE_GEN7(ring));
952
953 if (IS_GEN6(dev))
954 ering->vm_info.pp_dir_base =
955 I915_READ(RING_PP_DIR_BASE_READ(ring));
956 else if (IS_GEN7(dev))
957 ering->vm_info.pp_dir_base =
958 I915_READ(RING_PP_DIR_BASE(ring));
959 else if (INTEL_INFO(dev)->gen >= 8)
960 for (i = 0; i < 4; i++) {
961 ering->vm_info.pdp[i] =
962 I915_READ(GEN8_RING_PDP_UDW(ring, i));
963 ering->vm_info.pdp[i] <<= 32;
964 ering->vm_info.pdp[i] |=
965 I915_READ(GEN8_RING_PDP_LDW(ring, i));
966 }
967 }
968}
969
970
971static void i915_gem_record_active_context(struct intel_engine_cs *ring,
972 struct drm_i915_error_state *error,
973 struct drm_i915_error_ring *ering)
974{
975 struct drm_i915_private *dev_priv = ring->dev->dev_private;
976 struct drm_i915_gem_object *obj;
977
978 /* Currently render ring is the only HW context user */
979 if (ring->id != RCS || !error->ccid)
980 return;
981
982 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
983 if (!i915_gem_obj_ggtt_bound(obj))
984 continue;
985
986 if ((error->ccid & PAGE_MASK) == i915_gem_obj_ggtt_offset(obj)) {
987 ering->ctx = i915_error_ggtt_object_create(dev_priv, obj);
988 break;
989 }
990 }
991}
992
993static void i915_gem_record_rings(struct drm_device *dev,
994 struct drm_i915_error_state *error)
995{
996 struct drm_i915_private *dev_priv = dev->dev_private;
997 struct drm_i915_gem_request *request;
998 int i, count;
999
1000 for (i = 0; i < I915_NUM_RINGS; i++) {
1001 struct intel_engine_cs *ring = &dev_priv->ring[i];
1002 struct intel_ringbuffer *rbuf;
1003
1004 error->ring[i].pid = -1;
1005
1006 if (ring->dev == NULL)
1007 continue;
1008
1009 error->ring[i].valid = true;
1010
1011 i915_record_ring_state(dev, error, ring, &error->ring[i]);
1012
1013 request = i915_gem_find_active_request(ring);
1014 if (request) {
1015 struct i915_address_space *vm;
1016
1017 vm = request->ctx && request->ctx->ppgtt ?
1018 &request->ctx->ppgtt->base :
1019 &dev_priv->gtt.base;
1020
1021 /* We need to copy these to an anonymous buffer
1022 * as the simplest method to avoid being overwritten
1023 * by userspace.
1024 */
1025 error->ring[i].batchbuffer =
1026 i915_error_object_create(dev_priv,
1027 request->batch_obj,
1028 vm);
1029
1030 if (HAS_BROKEN_CS_TLB(dev_priv->dev))
1031 error->ring[i].wa_batchbuffer =
1032 i915_error_ggtt_object_create(dev_priv,
1033 ring->scratch.obj);
1034
1035 if (request->pid) {
1036 struct task_struct *task;
1037
1038 rcu_read_lock();
1039 task = pid_task(request->pid, PIDTYPE_PID);
1040 if (task) {
1041 strcpy(error->ring[i].comm, task->comm);
1042 error->ring[i].pid = task->pid;
1043 }
1044 rcu_read_unlock();
1045 }
1046 }
1047
1048 if (i915.enable_execlists) {
1049 /* TODO: This is only a small fix to keep basic error
1050 * capture working, but we need to add more information
1051 * for it to be useful (e.g. dump the context being
1052 * executed).
1053 */
1054 if (request)
1055 rbuf = request->ctx->engine[ring->id].ringbuf;
1056 else
1057 rbuf = dev_priv->kernel_context->engine[ring->id].ringbuf;
1058 } else
1059 rbuf = ring->buffer;
1060
1061 error->ring[i].cpu_ring_head = rbuf->head;
1062 error->ring[i].cpu_ring_tail = rbuf->tail;
1063
1064 error->ring[i].ringbuffer =
1065 i915_error_ggtt_object_create(dev_priv, rbuf->obj);
1066
1067 error->ring[i].hws_page =
1068 i915_error_ggtt_object_create(dev_priv, ring->status_page.obj);
1069
1070 i915_gem_record_active_context(ring, error, &error->ring[i]);
1071
1072 count = 0;
1073 list_for_each_entry(request, &ring->request_list, list)
1074 count++;
1075
1076 error->ring[i].num_requests = count;
1077 error->ring[i].requests =
1078 kcalloc(count, sizeof(*error->ring[i].requests),
1079 GFP_ATOMIC);
1080 if (error->ring[i].requests == NULL) {
1081 error->ring[i].num_requests = 0;
1082 continue;
1083 }
1084
1085 count = 0;
1086 list_for_each_entry(request, &ring->request_list, list) {
1087 struct drm_i915_error_request *erq;
1088
1089 if (count >= error->ring[i].num_requests) {
1090 /*
1091 * If the ring request list was changed in
1092 * between the point where the error request
1093 * list was created and dimensioned and this
1094 * point then just exit early to avoid crashes.
1095 *
1096 * We don't need to communicate that the
1097 * request list changed state during error
1098 * state capture and that the error state is
1099 * slightly incorrect as a consequence since we
1100 * are typically only interested in the request
1101 * list state at the point of error state
1102 * capture, not in any changes happening during
1103 * the capture.
1104 */
1105 break;
1106 }
1107
1108 erq = &error->ring[i].requests[count++];
1109 erq->seqno = request->seqno;
1110 erq->jiffies = request->emitted_jiffies;
1111 erq->tail = request->postfix;
1112 }
1113 }
1114}
1115
1116/* FIXME: Since pin count/bound list is global, we duplicate what we capture per
1117 * VM.
1118 */
1119static void i915_gem_capture_vm(struct drm_i915_private *dev_priv,
1120 struct drm_i915_error_state *error,
1121 struct i915_address_space *vm,
1122 const int ndx)
1123{
1124 struct drm_i915_error_buffer *active_bo = NULL, *pinned_bo = NULL;
1125 struct drm_i915_gem_object *obj;
1126 struct i915_vma *vma;
1127 int i;
1128
1129 i = 0;
1130 list_for_each_entry(vma, &vm->active_list, vm_link)
1131 i++;
1132 error->active_bo_count[ndx] = i;
1133
1134 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
1135 list_for_each_entry(vma, &obj->vma_list, obj_link)
1136 if (vma->vm == vm && vma->pin_count > 0)
1137 i++;
1138 }
1139 error->pinned_bo_count[ndx] = i - error->active_bo_count[ndx];
1140
1141 if (i) {
1142 active_bo = kcalloc(i, sizeof(*active_bo), GFP_ATOMIC);
1143 if (active_bo)
1144 pinned_bo = active_bo + error->active_bo_count[ndx];
1145 }
1146
1147 if (active_bo)
1148 error->active_bo_count[ndx] =
1149 capture_active_bo(active_bo,
1150 error->active_bo_count[ndx],
1151 &vm->active_list);
1152
1153 if (pinned_bo)
1154 error->pinned_bo_count[ndx] =
1155 capture_pinned_bo(pinned_bo,
1156 error->pinned_bo_count[ndx],
1157 &dev_priv->mm.bound_list, vm);
1158 error->active_bo[ndx] = active_bo;
1159 error->pinned_bo[ndx] = pinned_bo;
1160}
1161
1162static void i915_gem_capture_buffers(struct drm_i915_private *dev_priv,
1163 struct drm_i915_error_state *error)
1164{
1165 struct i915_address_space *vm;
1166 int cnt = 0, i = 0;
1167
1168 list_for_each_entry(vm, &dev_priv->vm_list, global_link)
1169 cnt++;
1170
1171 error->active_bo = kcalloc(cnt, sizeof(*error->active_bo), GFP_ATOMIC);
1172 error->pinned_bo = kcalloc(cnt, sizeof(*error->pinned_bo), GFP_ATOMIC);
1173 error->active_bo_count = kcalloc(cnt, sizeof(*error->active_bo_count),
1174 GFP_ATOMIC);
1175 error->pinned_bo_count = kcalloc(cnt, sizeof(*error->pinned_bo_count),
1176 GFP_ATOMIC);
1177
1178 if (error->active_bo == NULL ||
1179 error->pinned_bo == NULL ||
1180 error->active_bo_count == NULL ||
1181 error->pinned_bo_count == NULL) {
1182 kfree(error->active_bo);
1183 kfree(error->active_bo_count);
1184 kfree(error->pinned_bo);
1185 kfree(error->pinned_bo_count);
1186
1187 error->active_bo = NULL;
1188 error->active_bo_count = NULL;
1189 error->pinned_bo = NULL;
1190 error->pinned_bo_count = NULL;
1191 } else {
1192 list_for_each_entry(vm, &dev_priv->vm_list, global_link)
1193 i915_gem_capture_vm(dev_priv, error, vm, i++);
1194
1195 error->vm_count = cnt;
1196 }
1197}
1198
1199/* Capture all registers which don't fit into another category. */
1200static void i915_capture_reg_state(struct drm_i915_private *dev_priv,
1201 struct drm_i915_error_state *error)
1202{
1203 struct drm_device *dev = dev_priv->dev;
1204 int i;
1205
1206 /* General organization
1207 * 1. Registers specific to a single generation
1208 * 2. Registers which belong to multiple generations
1209 * 3. Feature specific registers.
1210 * 4. Everything else
1211 * Please try to follow the order.
1212 */
1213
1214 /* 1: Registers specific to a single generation */
1215 if (IS_VALLEYVIEW(dev)) {
1216 error->gtier[0] = I915_READ(GTIER);
1217 error->ier = I915_READ(VLV_IER);
1218 error->forcewake = I915_READ_FW(FORCEWAKE_VLV);
1219 }
1220
1221 if (IS_GEN7(dev))
1222 error->err_int = I915_READ(GEN7_ERR_INT);
1223
1224 if (INTEL_INFO(dev)->gen >= 8) {
1225 error->fault_data0 = I915_READ(GEN8_FAULT_TLB_DATA0);
1226 error->fault_data1 = I915_READ(GEN8_FAULT_TLB_DATA1);
1227 }
1228
1229 if (IS_GEN6(dev)) {
1230 error->forcewake = I915_READ_FW(FORCEWAKE);
1231 error->gab_ctl = I915_READ(GAB_CTL);
1232 error->gfx_mode = I915_READ(GFX_MODE);
1233 }
1234
1235 /* 2: Registers which belong to multiple generations */
1236 if (INTEL_INFO(dev)->gen >= 7)
1237 error->forcewake = I915_READ_FW(FORCEWAKE_MT);
1238
1239 if (INTEL_INFO(dev)->gen >= 6) {
1240 error->derrmr = I915_READ(DERRMR);
1241 error->error = I915_READ(ERROR_GEN6);
1242 error->done_reg = I915_READ(DONE_REG);
1243 }
1244
1245 /* 3: Feature specific registers */
1246 if (IS_GEN6(dev) || IS_GEN7(dev)) {
1247 error->gam_ecochk = I915_READ(GAM_ECOCHK);
1248 error->gac_eco = I915_READ(GAC_ECO_BITS);
1249 }
1250
1251 /* 4: Everything else */
1252 if (HAS_HW_CONTEXTS(dev))
1253 error->ccid = I915_READ(CCID);
1254
1255 if (INTEL_INFO(dev)->gen >= 8) {
1256 error->ier = I915_READ(GEN8_DE_MISC_IER);
1257 for (i = 0; i < 4; i++)
1258 error->gtier[i] = I915_READ(GEN8_GT_IER(i));
1259 } else if (HAS_PCH_SPLIT(dev)) {
1260 error->ier = I915_READ(DEIER);
1261 error->gtier[0] = I915_READ(GTIER);
1262 } else if (IS_GEN2(dev)) {
1263 error->ier = I915_READ16(IER);
1264 } else if (!IS_VALLEYVIEW(dev)) {
1265 error->ier = I915_READ(IER);
1266 }
1267 error->eir = I915_READ(EIR);
1268 error->pgtbl_er = I915_READ(PGTBL_ER);
1269
1270 i915_get_extra_instdone(dev, error->extra_instdone);
1271}
1272
1273static void i915_error_capture_msg(struct drm_device *dev,
1274 struct drm_i915_error_state *error,
1275 bool wedged,
1276 const char *error_msg)
1277{
1278 struct drm_i915_private *dev_priv = dev->dev_private;
1279 u32 ecode;
1280 int ring_id = -1, len;
1281
1282 ecode = i915_error_generate_code(dev_priv, error, &ring_id);
1283
1284 len = scnprintf(error->error_msg, sizeof(error->error_msg),
1285 "GPU HANG: ecode %d:%d:0x%08x",
1286 INTEL_INFO(dev)->gen, ring_id, ecode);
1287
1288 if (ring_id != -1 && error->ring[ring_id].pid != -1)
1289 len += scnprintf(error->error_msg + len,
1290 sizeof(error->error_msg) - len,
1291 ", in %s [%d]",
1292 error->ring[ring_id].comm,
1293 error->ring[ring_id].pid);
1294
1295 scnprintf(error->error_msg + len, sizeof(error->error_msg) - len,
1296 ", reason: %s, action: %s",
1297 error_msg,
1298 wedged ? "reset" : "continue");
1299}
1300
1301static void i915_capture_gen_state(struct drm_i915_private *dev_priv,
1302 struct drm_i915_error_state *error)
1303{
1304 error->iommu = -1;
1305#ifdef CONFIG_INTEL_IOMMU
1306 error->iommu = intel_iommu_gfx_mapped;
1307#endif
1308 error->reset_count = i915_reset_count(&dev_priv->gpu_error);
1309 error->suspend_count = dev_priv->suspend_count;
1310}
1311
1312/**
1313 * i915_capture_error_state - capture an error record for later analysis
1314 * @dev: drm device
1315 *
1316 * Should be called when an error is detected (either a hang or an error
1317 * interrupt) to capture error state from the time of the error. Fills
1318 * out a structure which becomes available in debugfs for user level tools
1319 * to pick up.
1320 */
1321void i915_capture_error_state(struct drm_device *dev, bool wedged,
1322 const char *error_msg)
1323{
1324 static bool warned;
1325 struct drm_i915_private *dev_priv = dev->dev_private;
1326 struct drm_i915_error_state *error;
1327 unsigned long flags;
1328
1329 /* Account for pipe specific data like PIPE*STAT */
1330 error = kzalloc(sizeof(*error), GFP_ATOMIC);
1331 if (!error) {
1332 DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
1333 return;
1334 }
1335
1336 kref_init(&error->ref);
1337
1338 i915_capture_gen_state(dev_priv, error);
1339 i915_capture_reg_state(dev_priv, error);
1340 i915_gem_capture_buffers(dev_priv, error);
1341 i915_gem_record_fences(dev, error);
1342 i915_gem_record_rings(dev, error);
1343
1344 do_gettimeofday(&error->time);
1345
1346 error->overlay = intel_overlay_capture_error_state(dev);
1347 error->display = intel_display_capture_error_state(dev);
1348
1349 i915_error_capture_msg(dev, error, wedged, error_msg);
1350 DRM_INFO("%s\n", error->error_msg);
1351
1352 spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
1353 if (dev_priv->gpu_error.first_error == NULL) {
1354 dev_priv->gpu_error.first_error = error;
1355 error = NULL;
1356 }
1357 spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
1358
1359 if (error) {
1360 i915_error_state_free(&error->ref);
1361 return;
1362 }
1363
1364 if (!warned) {
1365 DRM_INFO("GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.\n");
1366 DRM_INFO("Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel\n");
1367 DRM_INFO("drm/i915 developers can then reassign to the right component if it's not a kernel issue.\n");
1368 DRM_INFO("The gpu crash dump is required to analyze gpu hangs, so please always attach it.\n");
1369 DRM_INFO("GPU crash dump saved to /sys/class/drm/card%d/error\n", dev->primary->index);
1370 warned = true;
1371 }
1372}
1373
1374void i915_error_state_get(struct drm_device *dev,
1375 struct i915_error_state_file_priv *error_priv)
1376{
1377 struct drm_i915_private *dev_priv = dev->dev_private;
1378
1379 spin_lock_irq(&dev_priv->gpu_error.lock);
1380 error_priv->error = dev_priv->gpu_error.first_error;
1381 if (error_priv->error)
1382 kref_get(&error_priv->error->ref);
1383 spin_unlock_irq(&dev_priv->gpu_error.lock);
1384
1385}
1386
1387void i915_error_state_put(struct i915_error_state_file_priv *error_priv)
1388{
1389 if (error_priv->error)
1390 kref_put(&error_priv->error->ref, i915_error_state_free);
1391}
1392
1393void i915_destroy_error_state(struct drm_device *dev)
1394{
1395 struct drm_i915_private *dev_priv = dev->dev_private;
1396 struct drm_i915_error_state *error;
1397
1398 spin_lock_irq(&dev_priv->gpu_error.lock);
1399 error = dev_priv->gpu_error.first_error;
1400 dev_priv->gpu_error.first_error = NULL;
1401 spin_unlock_irq(&dev_priv->gpu_error.lock);
1402
1403 if (error)
1404 kref_put(&error->ref, i915_error_state_free);
1405}
1406
1407const char *i915_cache_level_str(struct drm_i915_private *i915, int type)
1408{
1409 switch (type) {
1410 case I915_CACHE_NONE: return " uncached";
1411 case I915_CACHE_LLC: return HAS_LLC(i915) ? " LLC" : " snooped";
1412 case I915_CACHE_L3_LLC: return " L3+LLC";
1413 case I915_CACHE_WT: return " WT";
1414 default: return "";
1415 }
1416}
1417
1418/* NB: please notice the memset */
1419void i915_get_extra_instdone(struct drm_device *dev, uint32_t *instdone)
1420{
1421 struct drm_i915_private *dev_priv = dev->dev_private;
1422 memset(instdone, 0, sizeof(*instdone) * I915_NUM_INSTDONE_REG);
1423
1424 if (IS_GEN2(dev) || IS_GEN3(dev))
1425 instdone[0] = I915_READ(GEN2_INSTDONE);
1426 else if (IS_GEN4(dev) || IS_GEN5(dev) || IS_GEN6(dev)) {
1427 instdone[0] = I915_READ(RING_INSTDONE(RENDER_RING_BASE));
1428 instdone[1] = I915_READ(GEN4_INSTDONE1);
1429 } else if (INTEL_INFO(dev)->gen >= 7) {
1430 instdone[0] = I915_READ(RING_INSTDONE(RENDER_RING_BASE));
1431 instdone[1] = I915_READ(GEN7_SC_INSTDONE);
1432 instdone[2] = I915_READ(GEN7_SAMPLER_INSTDONE);
1433 instdone[3] = I915_READ(GEN7_ROW_INSTDONE);
1434 }
1435}
1/*
2 * Copyright (c) 2008 Intel Corporation
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 (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 * Authors:
24 * Eric Anholt <eric@anholt.net>
25 * Keith Packard <keithp@keithp.com>
26 * Mika Kuoppala <mika.kuoppala@intel.com>
27 *
28 */
29
30#include <linux/ascii85.h>
31#include <linux/highmem.h>
32#include <linux/nmi.h>
33#include <linux/pagevec.h>
34#include <linux/scatterlist.h>
35#include <linux/string_helpers.h>
36#include <linux/utsname.h>
37#include <linux/zlib.h>
38
39#include <drm/drm_cache.h>
40#include <drm/drm_print.h>
41
42#include "display/intel_dmc.h"
43#include "display/intel_overlay.h"
44
45#include "gem/i915_gem_context.h"
46#include "gem/i915_gem_lmem.h"
47#include "gt/intel_engine_regs.h"
48#include "gt/intel_gt.h"
49#include "gt/intel_gt_mcr.h"
50#include "gt/intel_gt_pm.h"
51#include "gt/intel_gt_regs.h"
52#include "gt/uc/intel_guc_capture.h"
53
54#include "i915_driver.h"
55#include "i915_drv.h"
56#include "i915_gpu_error.h"
57#include "i915_memcpy.h"
58#include "i915_reg.h"
59#include "i915_scatterlist.h"
60#include "i915_utils.h"
61
62#define ALLOW_FAIL (__GFP_KSWAPD_RECLAIM | __GFP_RETRY_MAYFAIL | __GFP_NOWARN)
63#define ATOMIC_MAYFAIL (GFP_ATOMIC | __GFP_NOWARN)
64
65static void __sg_set_buf(struct scatterlist *sg,
66 void *addr, unsigned int len, loff_t it)
67{
68 sg->page_link = (unsigned long)virt_to_page(addr);
69 sg->offset = offset_in_page(addr);
70 sg->length = len;
71 sg->dma_address = it;
72}
73
74static bool __i915_error_grow(struct drm_i915_error_state_buf *e, size_t len)
75{
76 if (!len)
77 return false;
78
79 if (e->bytes + len + 1 <= e->size)
80 return true;
81
82 if (e->bytes) {
83 __sg_set_buf(e->cur++, e->buf, e->bytes, e->iter);
84 e->iter += e->bytes;
85 e->buf = NULL;
86 e->bytes = 0;
87 }
88
89 if (e->cur == e->end) {
90 struct scatterlist *sgl;
91
92 sgl = (typeof(sgl))__get_free_page(ALLOW_FAIL);
93 if (!sgl) {
94 e->err = -ENOMEM;
95 return false;
96 }
97
98 if (e->cur) {
99 e->cur->offset = 0;
100 e->cur->length = 0;
101 e->cur->page_link =
102 (unsigned long)sgl | SG_CHAIN;
103 } else {
104 e->sgl = sgl;
105 }
106
107 e->cur = sgl;
108 e->end = sgl + SG_MAX_SINGLE_ALLOC - 1;
109 }
110
111 e->size = ALIGN(len + 1, SZ_64K);
112 e->buf = kmalloc(e->size, ALLOW_FAIL);
113 if (!e->buf) {
114 e->size = PAGE_ALIGN(len + 1);
115 e->buf = kmalloc(e->size, GFP_KERNEL);
116 }
117 if (!e->buf) {
118 e->err = -ENOMEM;
119 return false;
120 }
121
122 return true;
123}
124
125__printf(2, 0)
126static void i915_error_vprintf(struct drm_i915_error_state_buf *e,
127 const char *fmt, va_list args)
128{
129 va_list ap;
130 int len;
131
132 if (e->err)
133 return;
134
135 va_copy(ap, args);
136 len = vsnprintf(NULL, 0, fmt, ap);
137 va_end(ap);
138 if (len <= 0) {
139 e->err = len;
140 return;
141 }
142
143 if (!__i915_error_grow(e, len))
144 return;
145
146 GEM_BUG_ON(e->bytes >= e->size);
147 len = vscnprintf(e->buf + e->bytes, e->size - e->bytes, fmt, args);
148 if (len < 0) {
149 e->err = len;
150 return;
151 }
152 e->bytes += len;
153}
154
155static void i915_error_puts(struct drm_i915_error_state_buf *e, const char *str)
156{
157 unsigned len;
158
159 if (e->err || !str)
160 return;
161
162 len = strlen(str);
163 if (!__i915_error_grow(e, len))
164 return;
165
166 GEM_BUG_ON(e->bytes + len > e->size);
167 memcpy(e->buf + e->bytes, str, len);
168 e->bytes += len;
169}
170
171#define err_printf(e, ...) i915_error_printf(e, __VA_ARGS__)
172#define err_puts(e, s) i915_error_puts(e, s)
173
174static void __i915_printfn_error(struct drm_printer *p, struct va_format *vaf)
175{
176 i915_error_vprintf(p->arg, vaf->fmt, *vaf->va);
177}
178
179static inline struct drm_printer
180i915_error_printer(struct drm_i915_error_state_buf *e)
181{
182 struct drm_printer p = {
183 .printfn = __i915_printfn_error,
184 .arg = e,
185 };
186 return p;
187}
188
189/* single threaded page allocator with a reserved stash for emergencies */
190static void pool_fini(struct pagevec *pv)
191{
192 pagevec_release(pv);
193}
194
195static int pool_refill(struct pagevec *pv, gfp_t gfp)
196{
197 while (pagevec_space(pv)) {
198 struct page *p;
199
200 p = alloc_page(gfp);
201 if (!p)
202 return -ENOMEM;
203
204 pagevec_add(pv, p);
205 }
206
207 return 0;
208}
209
210static int pool_init(struct pagevec *pv, gfp_t gfp)
211{
212 int err;
213
214 pagevec_init(pv);
215
216 err = pool_refill(pv, gfp);
217 if (err)
218 pool_fini(pv);
219
220 return err;
221}
222
223static void *pool_alloc(struct pagevec *pv, gfp_t gfp)
224{
225 struct page *p;
226
227 p = alloc_page(gfp);
228 if (!p && pagevec_count(pv))
229 p = pv->pages[--pv->nr];
230
231 return p ? page_address(p) : NULL;
232}
233
234static void pool_free(struct pagevec *pv, void *addr)
235{
236 struct page *p = virt_to_page(addr);
237
238 if (pagevec_space(pv))
239 pagevec_add(pv, p);
240 else
241 __free_page(p);
242}
243
244#ifdef CONFIG_DRM_I915_COMPRESS_ERROR
245
246struct i915_vma_compress {
247 struct pagevec pool;
248 struct z_stream_s zstream;
249 void *tmp;
250};
251
252static bool compress_init(struct i915_vma_compress *c)
253{
254 struct z_stream_s *zstream = &c->zstream;
255
256 if (pool_init(&c->pool, ALLOW_FAIL))
257 return false;
258
259 zstream->workspace =
260 kmalloc(zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL),
261 ALLOW_FAIL);
262 if (!zstream->workspace) {
263 pool_fini(&c->pool);
264 return false;
265 }
266
267 c->tmp = NULL;
268 if (i915_has_memcpy_from_wc())
269 c->tmp = pool_alloc(&c->pool, ALLOW_FAIL);
270
271 return true;
272}
273
274static bool compress_start(struct i915_vma_compress *c)
275{
276 struct z_stream_s *zstream = &c->zstream;
277 void *workspace = zstream->workspace;
278
279 memset(zstream, 0, sizeof(*zstream));
280 zstream->workspace = workspace;
281
282 return zlib_deflateInit(zstream, Z_DEFAULT_COMPRESSION) == Z_OK;
283}
284
285static void *compress_next_page(struct i915_vma_compress *c,
286 struct i915_vma_coredump *dst)
287{
288 void *page_addr;
289 struct page *page;
290
291 page_addr = pool_alloc(&c->pool, ALLOW_FAIL);
292 if (!page_addr)
293 return ERR_PTR(-ENOMEM);
294
295 page = virt_to_page(page_addr);
296 list_add_tail(&page->lru, &dst->page_list);
297 return page_addr;
298}
299
300static int compress_page(struct i915_vma_compress *c,
301 void *src,
302 struct i915_vma_coredump *dst,
303 bool wc)
304{
305 struct z_stream_s *zstream = &c->zstream;
306
307 zstream->next_in = src;
308 if (wc && c->tmp && i915_memcpy_from_wc(c->tmp, src, PAGE_SIZE))
309 zstream->next_in = c->tmp;
310 zstream->avail_in = PAGE_SIZE;
311
312 do {
313 if (zstream->avail_out == 0) {
314 zstream->next_out = compress_next_page(c, dst);
315 if (IS_ERR(zstream->next_out))
316 return PTR_ERR(zstream->next_out);
317
318 zstream->avail_out = PAGE_SIZE;
319 }
320
321 if (zlib_deflate(zstream, Z_NO_FLUSH) != Z_OK)
322 return -EIO;
323
324 cond_resched();
325 } while (zstream->avail_in);
326
327 /* Fallback to uncompressed if we increase size? */
328 if (0 && zstream->total_out > zstream->total_in)
329 return -E2BIG;
330
331 return 0;
332}
333
334static int compress_flush(struct i915_vma_compress *c,
335 struct i915_vma_coredump *dst)
336{
337 struct z_stream_s *zstream = &c->zstream;
338
339 do {
340 switch (zlib_deflate(zstream, Z_FINISH)) {
341 case Z_OK: /* more space requested */
342 zstream->next_out = compress_next_page(c, dst);
343 if (IS_ERR(zstream->next_out))
344 return PTR_ERR(zstream->next_out);
345
346 zstream->avail_out = PAGE_SIZE;
347 break;
348
349 case Z_STREAM_END:
350 goto end;
351
352 default: /* any error */
353 return -EIO;
354 }
355 } while (1);
356
357end:
358 memset(zstream->next_out, 0, zstream->avail_out);
359 dst->unused = zstream->avail_out;
360 return 0;
361}
362
363static void compress_finish(struct i915_vma_compress *c)
364{
365 zlib_deflateEnd(&c->zstream);
366}
367
368static void compress_fini(struct i915_vma_compress *c)
369{
370 kfree(c->zstream.workspace);
371 if (c->tmp)
372 pool_free(&c->pool, c->tmp);
373 pool_fini(&c->pool);
374}
375
376static void err_compression_marker(struct drm_i915_error_state_buf *m)
377{
378 err_puts(m, ":");
379}
380
381#else
382
383struct i915_vma_compress {
384 struct pagevec pool;
385};
386
387static bool compress_init(struct i915_vma_compress *c)
388{
389 return pool_init(&c->pool, ALLOW_FAIL) == 0;
390}
391
392static bool compress_start(struct i915_vma_compress *c)
393{
394 return true;
395}
396
397static int compress_page(struct i915_vma_compress *c,
398 void *src,
399 struct i915_vma_coredump *dst,
400 bool wc)
401{
402 void *ptr;
403
404 ptr = pool_alloc(&c->pool, ALLOW_FAIL);
405 if (!ptr)
406 return -ENOMEM;
407
408 if (!(wc && i915_memcpy_from_wc(ptr, src, PAGE_SIZE)))
409 memcpy(ptr, src, PAGE_SIZE);
410 list_add_tail(&virt_to_page(ptr)->lru, &dst->page_list);
411 cond_resched();
412
413 return 0;
414}
415
416static int compress_flush(struct i915_vma_compress *c,
417 struct i915_vma_coredump *dst)
418{
419 return 0;
420}
421
422static void compress_finish(struct i915_vma_compress *c)
423{
424}
425
426static void compress_fini(struct i915_vma_compress *c)
427{
428 pool_fini(&c->pool);
429}
430
431static void err_compression_marker(struct drm_i915_error_state_buf *m)
432{
433 err_puts(m, "~");
434}
435
436#endif
437
438static void error_print_instdone(struct drm_i915_error_state_buf *m,
439 const struct intel_engine_coredump *ee)
440{
441 int slice;
442 int subslice;
443 int iter;
444
445 err_printf(m, " INSTDONE: 0x%08x\n",
446 ee->instdone.instdone);
447
448 if (ee->engine->class != RENDER_CLASS || GRAPHICS_VER(m->i915) <= 3)
449 return;
450
451 err_printf(m, " SC_INSTDONE: 0x%08x\n",
452 ee->instdone.slice_common);
453
454 if (GRAPHICS_VER(m->i915) <= 6)
455 return;
456
457 for_each_ss_steering(iter, ee->engine->gt, slice, subslice)
458 err_printf(m, " SAMPLER_INSTDONE[%d][%d]: 0x%08x\n",
459 slice, subslice,
460 ee->instdone.sampler[slice][subslice]);
461
462 for_each_ss_steering(iter, ee->engine->gt, slice, subslice)
463 err_printf(m, " ROW_INSTDONE[%d][%d]: 0x%08x\n",
464 slice, subslice,
465 ee->instdone.row[slice][subslice]);
466
467 if (GRAPHICS_VER(m->i915) < 12)
468 return;
469
470 if (GRAPHICS_VER_FULL(m->i915) >= IP_VER(12, 55)) {
471 for_each_ss_steering(iter, ee->engine->gt, slice, subslice)
472 err_printf(m, " GEOM_SVGUNIT_INSTDONE[%d][%d]: 0x%08x\n",
473 slice, subslice,
474 ee->instdone.geom_svg[slice][subslice]);
475 }
476
477 err_printf(m, " SC_INSTDONE_EXTRA: 0x%08x\n",
478 ee->instdone.slice_common_extra[0]);
479 err_printf(m, " SC_INSTDONE_EXTRA2: 0x%08x\n",
480 ee->instdone.slice_common_extra[1]);
481}
482
483static void error_print_request(struct drm_i915_error_state_buf *m,
484 const char *prefix,
485 const struct i915_request_coredump *erq)
486{
487 if (!erq->seqno)
488 return;
489
490 err_printf(m, "%s pid %d, seqno %8x:%08x%s%s, prio %d, head %08x, tail %08x\n",
491 prefix, erq->pid, erq->context, erq->seqno,
492 test_bit(DMA_FENCE_FLAG_SIGNALED_BIT,
493 &erq->flags) ? "!" : "",
494 test_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT,
495 &erq->flags) ? "+" : "",
496 erq->sched_attr.priority,
497 erq->head, erq->tail);
498}
499
500static void error_print_context(struct drm_i915_error_state_buf *m,
501 const char *header,
502 const struct i915_gem_context_coredump *ctx)
503{
504 err_printf(m, "%s%s[%d] prio %d, guilty %d active %d, runtime total %lluns, avg %lluns\n",
505 header, ctx->comm, ctx->pid, ctx->sched_attr.priority,
506 ctx->guilty, ctx->active,
507 ctx->total_runtime, ctx->avg_runtime);
508}
509
510static struct i915_vma_coredump *
511__find_vma(struct i915_vma_coredump *vma, const char *name)
512{
513 while (vma) {
514 if (strcmp(vma->name, name) == 0)
515 return vma;
516 vma = vma->next;
517 }
518
519 return NULL;
520}
521
522struct i915_vma_coredump *
523intel_gpu_error_find_batch(const struct intel_engine_coredump *ee)
524{
525 return __find_vma(ee->vma, "batch");
526}
527
528static void error_print_engine(struct drm_i915_error_state_buf *m,
529 const struct intel_engine_coredump *ee)
530{
531 struct i915_vma_coredump *batch;
532 int n;
533
534 err_printf(m, "%s command stream:\n", ee->engine->name);
535 err_printf(m, " CCID: 0x%08x\n", ee->ccid);
536 err_printf(m, " START: 0x%08x\n", ee->start);
537 err_printf(m, " HEAD: 0x%08x [0x%08x]\n", ee->head, ee->rq_head);
538 err_printf(m, " TAIL: 0x%08x [0x%08x, 0x%08x]\n",
539 ee->tail, ee->rq_post, ee->rq_tail);
540 err_printf(m, " CTL: 0x%08x\n", ee->ctl);
541 err_printf(m, " MODE: 0x%08x\n", ee->mode);
542 err_printf(m, " HWS: 0x%08x\n", ee->hws);
543 err_printf(m, " ACTHD: 0x%08x %08x\n",
544 (u32)(ee->acthd>>32), (u32)ee->acthd);
545 err_printf(m, " IPEIR: 0x%08x\n", ee->ipeir);
546 err_printf(m, " IPEHR: 0x%08x\n", ee->ipehr);
547 err_printf(m, " ESR: 0x%08x\n", ee->esr);
548
549 error_print_instdone(m, ee);
550
551 batch = intel_gpu_error_find_batch(ee);
552 if (batch) {
553 u64 start = batch->gtt_offset;
554 u64 end = start + batch->gtt_size;
555
556 err_printf(m, " batch: [0x%08x_%08x, 0x%08x_%08x]\n",
557 upper_32_bits(start), lower_32_bits(start),
558 upper_32_bits(end), lower_32_bits(end));
559 }
560 if (GRAPHICS_VER(m->i915) >= 4) {
561 err_printf(m, " BBADDR: 0x%08x_%08x\n",
562 (u32)(ee->bbaddr>>32), (u32)ee->bbaddr);
563 err_printf(m, " BB_STATE: 0x%08x\n", ee->bbstate);
564 err_printf(m, " INSTPS: 0x%08x\n", ee->instps);
565 }
566 err_printf(m, " INSTPM: 0x%08x\n", ee->instpm);
567 err_printf(m, " FADDR: 0x%08x %08x\n", upper_32_bits(ee->faddr),
568 lower_32_bits(ee->faddr));
569 if (GRAPHICS_VER(m->i915) >= 6) {
570 err_printf(m, " RC PSMI: 0x%08x\n", ee->rc_psmi);
571 err_printf(m, " FAULT_REG: 0x%08x\n", ee->fault_reg);
572 }
573 if (GRAPHICS_VER(m->i915) >= 11) {
574 err_printf(m, " NOPID: 0x%08x\n", ee->nopid);
575 err_printf(m, " EXCC: 0x%08x\n", ee->excc);
576 err_printf(m, " CMD_CCTL: 0x%08x\n", ee->cmd_cctl);
577 err_printf(m, " CSCMDOP: 0x%08x\n", ee->cscmdop);
578 err_printf(m, " CTX_SR_CTL: 0x%08x\n", ee->ctx_sr_ctl);
579 err_printf(m, " DMA_FADDR_HI: 0x%08x\n", ee->dma_faddr_hi);
580 err_printf(m, " DMA_FADDR_LO: 0x%08x\n", ee->dma_faddr_lo);
581 }
582 if (HAS_PPGTT(m->i915)) {
583 err_printf(m, " GFX_MODE: 0x%08x\n", ee->vm_info.gfx_mode);
584
585 if (GRAPHICS_VER(m->i915) >= 8) {
586 int i;
587 for (i = 0; i < 4; i++)
588 err_printf(m, " PDP%d: 0x%016llx\n",
589 i, ee->vm_info.pdp[i]);
590 } else {
591 err_printf(m, " PP_DIR_BASE: 0x%08x\n",
592 ee->vm_info.pp_dir_base);
593 }
594 }
595
596 for (n = 0; n < ee->num_ports; n++) {
597 err_printf(m, " ELSP[%d]:", n);
598 error_print_request(m, " ", &ee->execlist[n]);
599 }
600}
601
602void i915_error_printf(struct drm_i915_error_state_buf *e, const char *f, ...)
603{
604 va_list args;
605
606 va_start(args, f);
607 i915_error_vprintf(e, f, args);
608 va_end(args);
609}
610
611void intel_gpu_error_print_vma(struct drm_i915_error_state_buf *m,
612 const struct intel_engine_cs *engine,
613 const struct i915_vma_coredump *vma)
614{
615 char out[ASCII85_BUFSZ];
616 struct page *page;
617
618 if (!vma)
619 return;
620
621 err_printf(m, "%s --- %s = 0x%08x %08x\n",
622 engine ? engine->name : "global", vma->name,
623 upper_32_bits(vma->gtt_offset),
624 lower_32_bits(vma->gtt_offset));
625
626 if (vma->gtt_page_sizes > I915_GTT_PAGE_SIZE_4K)
627 err_printf(m, "gtt_page_sizes = 0x%08x\n", vma->gtt_page_sizes);
628
629 err_compression_marker(m);
630 list_for_each_entry(page, &vma->page_list, lru) {
631 int i, len;
632 const u32 *addr = page_address(page);
633
634 len = PAGE_SIZE;
635 if (page == list_last_entry(&vma->page_list, typeof(*page), lru))
636 len -= vma->unused;
637 len = ascii85_encode_len(len);
638
639 for (i = 0; i < len; i++)
640 err_puts(m, ascii85_encode(addr[i], out));
641 }
642 err_puts(m, "\n");
643}
644
645static void err_print_capabilities(struct drm_i915_error_state_buf *m,
646 struct i915_gpu_coredump *error)
647{
648 struct drm_printer p = i915_error_printer(m);
649
650 intel_device_info_print(&error->device_info, &error->runtime_info, &p);
651 intel_driver_caps_print(&error->driver_caps, &p);
652}
653
654static void err_print_params(struct drm_i915_error_state_buf *m,
655 const struct i915_params *params)
656{
657 struct drm_printer p = i915_error_printer(m);
658
659 i915_params_dump(params, &p);
660}
661
662static void err_print_pciid(struct drm_i915_error_state_buf *m,
663 struct drm_i915_private *i915)
664{
665 struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
666
667 err_printf(m, "PCI ID: 0x%04x\n", pdev->device);
668 err_printf(m, "PCI Revision: 0x%02x\n", pdev->revision);
669 err_printf(m, "PCI Subsystem: %04x:%04x\n",
670 pdev->subsystem_vendor,
671 pdev->subsystem_device);
672}
673
674static void err_print_guc_ctb(struct drm_i915_error_state_buf *m,
675 const char *name,
676 const struct intel_ctb_coredump *ctb)
677{
678 if (!ctb->size)
679 return;
680
681 err_printf(m, "GuC %s CTB: raw: 0x%08X, 0x%08X/%08X, cached: 0x%08X/%08X, desc = 0x%08X, buf = 0x%08X x 0x%08X\n",
682 name, ctb->raw_status, ctb->raw_head, ctb->raw_tail,
683 ctb->head, ctb->tail, ctb->desc_offset, ctb->cmds_offset, ctb->size);
684}
685
686static void err_print_uc(struct drm_i915_error_state_buf *m,
687 const struct intel_uc_coredump *error_uc)
688{
689 struct drm_printer p = i915_error_printer(m);
690
691 intel_uc_fw_dump(&error_uc->guc_fw, &p);
692 intel_uc_fw_dump(&error_uc->huc_fw, &p);
693 err_printf(m, "GuC timestamp: 0x%08x\n", error_uc->guc.timestamp);
694 intel_gpu_error_print_vma(m, NULL, error_uc->guc.vma_log);
695 err_printf(m, "GuC CTB fence: %d\n", error_uc->guc.last_fence);
696 err_print_guc_ctb(m, "Send", error_uc->guc.ctb + 0);
697 err_print_guc_ctb(m, "Recv", error_uc->guc.ctb + 1);
698 intel_gpu_error_print_vma(m, NULL, error_uc->guc.vma_ctb);
699}
700
701static void err_free_sgl(struct scatterlist *sgl)
702{
703 while (sgl) {
704 struct scatterlist *sg;
705
706 for (sg = sgl; !sg_is_chain(sg); sg++) {
707 kfree(sg_virt(sg));
708 if (sg_is_last(sg))
709 break;
710 }
711
712 sg = sg_is_last(sg) ? NULL : sg_chain_ptr(sg);
713 free_page((unsigned long)sgl);
714 sgl = sg;
715 }
716}
717
718static void err_print_gt_info(struct drm_i915_error_state_buf *m,
719 struct intel_gt_coredump *gt)
720{
721 struct drm_printer p = i915_error_printer(m);
722
723 intel_gt_info_print(>->info, &p);
724 intel_sseu_print_topology(gt->_gt->i915, >->info.sseu, &p);
725}
726
727static void err_print_gt_display(struct drm_i915_error_state_buf *m,
728 struct intel_gt_coredump *gt)
729{
730 err_printf(m, "IER: 0x%08x\n", gt->ier);
731 err_printf(m, "DERRMR: 0x%08x\n", gt->derrmr);
732}
733
734static void err_print_gt_global_nonguc(struct drm_i915_error_state_buf *m,
735 struct intel_gt_coredump *gt)
736{
737 int i;
738
739 err_printf(m, "GT awake: %s\n", str_yes_no(gt->awake));
740 err_printf(m, "CS timestamp frequency: %u Hz, %d ns\n",
741 gt->clock_frequency, gt->clock_period_ns);
742 err_printf(m, "EIR: 0x%08x\n", gt->eir);
743 err_printf(m, "PGTBL_ER: 0x%08x\n", gt->pgtbl_er);
744
745 for (i = 0; i < gt->ngtier; i++)
746 err_printf(m, "GTIER[%d]: 0x%08x\n", i, gt->gtier[i]);
747}
748
749static void err_print_gt_global(struct drm_i915_error_state_buf *m,
750 struct intel_gt_coredump *gt)
751{
752 err_printf(m, "FORCEWAKE: 0x%08x\n", gt->forcewake);
753
754 if (IS_GRAPHICS_VER(m->i915, 6, 11)) {
755 err_printf(m, "ERROR: 0x%08x\n", gt->error);
756 err_printf(m, "DONE_REG: 0x%08x\n", gt->done_reg);
757 }
758
759 if (GRAPHICS_VER(m->i915) >= 8)
760 err_printf(m, "FAULT_TLB_DATA: 0x%08x 0x%08x\n",
761 gt->fault_data1, gt->fault_data0);
762
763 if (GRAPHICS_VER(m->i915) == 7)
764 err_printf(m, "ERR_INT: 0x%08x\n", gt->err_int);
765
766 if (IS_GRAPHICS_VER(m->i915, 8, 11))
767 err_printf(m, "GTT_CACHE_EN: 0x%08x\n", gt->gtt_cache);
768
769 if (GRAPHICS_VER(m->i915) == 12)
770 err_printf(m, "AUX_ERR_DBG: 0x%08x\n", gt->aux_err);
771
772 if (GRAPHICS_VER(m->i915) >= 12) {
773 int i;
774
775 for (i = 0; i < I915_MAX_SFC; i++) {
776 /*
777 * SFC_DONE resides in the VD forcewake domain, so it
778 * only exists if the corresponding VCS engine is
779 * present.
780 */
781 if ((gt->_gt->info.sfc_mask & BIT(i)) == 0 ||
782 !HAS_ENGINE(gt->_gt, _VCS(i * 2)))
783 continue;
784
785 err_printf(m, " SFC_DONE[%d]: 0x%08x\n", i,
786 gt->sfc_done[i]);
787 }
788
789 err_printf(m, " GAM_DONE: 0x%08x\n", gt->gam_done);
790 }
791}
792
793static void err_print_gt_fences(struct drm_i915_error_state_buf *m,
794 struct intel_gt_coredump *gt)
795{
796 int i;
797
798 for (i = 0; i < gt->nfence; i++)
799 err_printf(m, " fence[%d] = %08llx\n", i, gt->fence[i]);
800}
801
802static void err_print_gt_engines(struct drm_i915_error_state_buf *m,
803 struct intel_gt_coredump *gt)
804{
805 const struct intel_engine_coredump *ee;
806
807 for (ee = gt->engine; ee; ee = ee->next) {
808 const struct i915_vma_coredump *vma;
809
810 if (ee->guc_capture_node)
811 intel_guc_capture_print_engine_node(m, ee);
812 else
813 error_print_engine(m, ee);
814
815 err_printf(m, " hung: %u\n", ee->hung);
816 err_printf(m, " engine reset count: %u\n", ee->reset_count);
817 error_print_context(m, " Active context: ", &ee->context);
818
819 for (vma = ee->vma; vma; vma = vma->next)
820 intel_gpu_error_print_vma(m, ee->engine, vma);
821 }
822
823}
824
825static void __err_print_to_sgl(struct drm_i915_error_state_buf *m,
826 struct i915_gpu_coredump *error)
827{
828 const struct intel_engine_coredump *ee;
829 struct timespec64 ts;
830
831 if (*error->error_msg)
832 err_printf(m, "%s\n", error->error_msg);
833 err_printf(m, "Kernel: %s %s\n",
834 init_utsname()->release,
835 init_utsname()->machine);
836 err_printf(m, "Driver: %s\n", DRIVER_DATE);
837 ts = ktime_to_timespec64(error->time);
838 err_printf(m, "Time: %lld s %ld us\n",
839 (s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC);
840 ts = ktime_to_timespec64(error->boottime);
841 err_printf(m, "Boottime: %lld s %ld us\n",
842 (s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC);
843 ts = ktime_to_timespec64(error->uptime);
844 err_printf(m, "Uptime: %lld s %ld us\n",
845 (s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC);
846 err_printf(m, "Capture: %lu jiffies; %d ms ago\n",
847 error->capture, jiffies_to_msecs(jiffies - error->capture));
848
849 for (ee = error->gt ? error->gt->engine : NULL; ee; ee = ee->next)
850 err_printf(m, "Active process (on ring %s): %s [%d]\n",
851 ee->engine->name,
852 ee->context.comm,
853 ee->context.pid);
854
855 err_printf(m, "Reset count: %u\n", error->reset_count);
856 err_printf(m, "Suspend count: %u\n", error->suspend_count);
857 err_printf(m, "Platform: %s\n", intel_platform_name(error->device_info.platform));
858 err_printf(m, "Subplatform: 0x%x\n",
859 intel_subplatform(&error->runtime_info,
860 error->device_info.platform));
861 err_print_pciid(m, m->i915);
862
863 err_printf(m, "IOMMU enabled?: %d\n", error->iommu);
864
865 intel_dmc_print_error_state(m, m->i915);
866
867 err_printf(m, "RPM wakelock: %s\n", str_yes_no(error->wakelock));
868 err_printf(m, "PM suspended: %s\n", str_yes_no(error->suspended));
869
870 if (error->gt) {
871 bool print_guc_capture = false;
872
873 if (error->gt->uc && error->gt->uc->guc.is_guc_capture)
874 print_guc_capture = true;
875
876 err_print_gt_display(m, error->gt);
877 err_print_gt_global_nonguc(m, error->gt);
878 err_print_gt_fences(m, error->gt);
879
880 /*
881 * GuC dumped global, eng-class and eng-instance registers together
882 * as part of engine state dump so we print in err_print_gt_engines
883 */
884 if (!print_guc_capture)
885 err_print_gt_global(m, error->gt);
886
887 err_print_gt_engines(m, error->gt);
888
889 if (error->gt->uc)
890 err_print_uc(m, error->gt->uc);
891
892 err_print_gt_info(m, error->gt);
893 }
894
895 if (error->overlay)
896 intel_overlay_print_error_state(m, error->overlay);
897
898 err_print_capabilities(m, error);
899 err_print_params(m, &error->params);
900}
901
902static int err_print_to_sgl(struct i915_gpu_coredump *error)
903{
904 struct drm_i915_error_state_buf m;
905
906 if (IS_ERR(error))
907 return PTR_ERR(error);
908
909 if (READ_ONCE(error->sgl))
910 return 0;
911
912 memset(&m, 0, sizeof(m));
913 m.i915 = error->i915;
914
915 __err_print_to_sgl(&m, error);
916
917 if (m.buf) {
918 __sg_set_buf(m.cur++, m.buf, m.bytes, m.iter);
919 m.bytes = 0;
920 m.buf = NULL;
921 }
922 if (m.cur) {
923 GEM_BUG_ON(m.end < m.cur);
924 sg_mark_end(m.cur - 1);
925 }
926 GEM_BUG_ON(m.sgl && !m.cur);
927
928 if (m.err) {
929 err_free_sgl(m.sgl);
930 return m.err;
931 }
932
933 if (cmpxchg(&error->sgl, NULL, m.sgl))
934 err_free_sgl(m.sgl);
935
936 return 0;
937}
938
939ssize_t i915_gpu_coredump_copy_to_buffer(struct i915_gpu_coredump *error,
940 char *buf, loff_t off, size_t rem)
941{
942 struct scatterlist *sg;
943 size_t count;
944 loff_t pos;
945 int err;
946
947 if (!error || !rem)
948 return 0;
949
950 err = err_print_to_sgl(error);
951 if (err)
952 return err;
953
954 sg = READ_ONCE(error->fit);
955 if (!sg || off < sg->dma_address)
956 sg = error->sgl;
957 if (!sg)
958 return 0;
959
960 pos = sg->dma_address;
961 count = 0;
962 do {
963 size_t len, start;
964
965 if (sg_is_chain(sg)) {
966 sg = sg_chain_ptr(sg);
967 GEM_BUG_ON(sg_is_chain(sg));
968 }
969
970 len = sg->length;
971 if (pos + len <= off) {
972 pos += len;
973 continue;
974 }
975
976 start = sg->offset;
977 if (pos < off) {
978 GEM_BUG_ON(off - pos > len);
979 len -= off - pos;
980 start += off - pos;
981 pos = off;
982 }
983
984 len = min(len, rem);
985 GEM_BUG_ON(!len || len > sg->length);
986
987 memcpy(buf, page_address(sg_page(sg)) + start, len);
988
989 count += len;
990 pos += len;
991
992 buf += len;
993 rem -= len;
994 if (!rem) {
995 WRITE_ONCE(error->fit, sg);
996 break;
997 }
998 } while (!sg_is_last(sg++));
999
1000 return count;
1001}
1002
1003static void i915_vma_coredump_free(struct i915_vma_coredump *vma)
1004{
1005 while (vma) {
1006 struct i915_vma_coredump *next = vma->next;
1007 struct page *page, *n;
1008
1009 list_for_each_entry_safe(page, n, &vma->page_list, lru) {
1010 list_del_init(&page->lru);
1011 __free_page(page);
1012 }
1013
1014 kfree(vma);
1015 vma = next;
1016 }
1017}
1018
1019static void cleanup_params(struct i915_gpu_coredump *error)
1020{
1021 i915_params_free(&error->params);
1022}
1023
1024static void cleanup_uc(struct intel_uc_coredump *uc)
1025{
1026 kfree(uc->guc_fw.file_selected.path);
1027 kfree(uc->huc_fw.file_selected.path);
1028 kfree(uc->guc_fw.file_wanted.path);
1029 kfree(uc->huc_fw.file_wanted.path);
1030 i915_vma_coredump_free(uc->guc.vma_log);
1031 i915_vma_coredump_free(uc->guc.vma_ctb);
1032
1033 kfree(uc);
1034}
1035
1036static void cleanup_gt(struct intel_gt_coredump *gt)
1037{
1038 while (gt->engine) {
1039 struct intel_engine_coredump *ee = gt->engine;
1040
1041 gt->engine = ee->next;
1042
1043 i915_vma_coredump_free(ee->vma);
1044 intel_guc_capture_free_node(ee);
1045 kfree(ee);
1046 }
1047
1048 if (gt->uc)
1049 cleanup_uc(gt->uc);
1050
1051 kfree(gt);
1052}
1053
1054void __i915_gpu_coredump_free(struct kref *error_ref)
1055{
1056 struct i915_gpu_coredump *error =
1057 container_of(error_ref, typeof(*error), ref);
1058
1059 while (error->gt) {
1060 struct intel_gt_coredump *gt = error->gt;
1061
1062 error->gt = gt->next;
1063 cleanup_gt(gt);
1064 }
1065
1066 kfree(error->overlay);
1067
1068 cleanup_params(error);
1069
1070 err_free_sgl(error->sgl);
1071 kfree(error);
1072}
1073
1074static struct i915_vma_coredump *
1075i915_vma_coredump_create(const struct intel_gt *gt,
1076 const struct i915_vma_resource *vma_res,
1077 struct i915_vma_compress *compress,
1078 const char *name)
1079
1080{
1081 struct i915_ggtt *ggtt = gt->ggtt;
1082 const u64 slot = ggtt->error_capture.start;
1083 struct i915_vma_coredump *dst;
1084 struct sgt_iter iter;
1085 int ret;
1086
1087 might_sleep();
1088
1089 if (!vma_res || !vma_res->bi.pages || !compress)
1090 return NULL;
1091
1092 dst = kmalloc(sizeof(*dst), ALLOW_FAIL);
1093 if (!dst)
1094 return NULL;
1095
1096 if (!compress_start(compress)) {
1097 kfree(dst);
1098 return NULL;
1099 }
1100
1101 INIT_LIST_HEAD(&dst->page_list);
1102 strcpy(dst->name, name);
1103 dst->next = NULL;
1104
1105 dst->gtt_offset = vma_res->start;
1106 dst->gtt_size = vma_res->node_size;
1107 dst->gtt_page_sizes = vma_res->page_sizes_gtt;
1108 dst->unused = 0;
1109
1110 ret = -EINVAL;
1111 if (drm_mm_node_allocated(&ggtt->error_capture)) {
1112 void __iomem *s;
1113 dma_addr_t dma;
1114
1115 for_each_sgt_daddr(dma, iter, vma_res->bi.pages) {
1116 mutex_lock(&ggtt->error_mutex);
1117 if (ggtt->vm.raw_insert_page)
1118 ggtt->vm.raw_insert_page(&ggtt->vm, dma, slot,
1119 I915_CACHE_NONE, 0);
1120 else
1121 ggtt->vm.insert_page(&ggtt->vm, dma, slot,
1122 I915_CACHE_NONE, 0);
1123 mb();
1124
1125 s = io_mapping_map_wc(&ggtt->iomap, slot, PAGE_SIZE);
1126 ret = compress_page(compress,
1127 (void __force *)s, dst,
1128 true);
1129 io_mapping_unmap(s);
1130
1131 mb();
1132 ggtt->vm.clear_range(&ggtt->vm, slot, PAGE_SIZE);
1133 mutex_unlock(&ggtt->error_mutex);
1134 if (ret)
1135 break;
1136 }
1137 } else if (vma_res->bi.lmem) {
1138 struct intel_memory_region *mem = vma_res->mr;
1139 dma_addr_t dma;
1140
1141 for_each_sgt_daddr(dma, iter, vma_res->bi.pages) {
1142 dma_addr_t offset = dma - mem->region.start;
1143 void __iomem *s;
1144
1145 if (offset + PAGE_SIZE > mem->io_size) {
1146 ret = -EINVAL;
1147 break;
1148 }
1149
1150 s = io_mapping_map_wc(&mem->iomap, offset, PAGE_SIZE);
1151 ret = compress_page(compress,
1152 (void __force *)s, dst,
1153 true);
1154 io_mapping_unmap(s);
1155 if (ret)
1156 break;
1157 }
1158 } else {
1159 struct page *page;
1160
1161 for_each_sgt_page(page, iter, vma_res->bi.pages) {
1162 void *s;
1163
1164 drm_clflush_pages(&page, 1);
1165
1166 s = kmap(page);
1167 ret = compress_page(compress, s, dst, false);
1168 kunmap(page);
1169
1170 drm_clflush_pages(&page, 1);
1171
1172 if (ret)
1173 break;
1174 }
1175 }
1176
1177 if (ret || compress_flush(compress, dst)) {
1178 struct page *page, *n;
1179
1180 list_for_each_entry_safe_reverse(page, n, &dst->page_list, lru) {
1181 list_del_init(&page->lru);
1182 pool_free(&compress->pool, page_address(page));
1183 }
1184
1185 kfree(dst);
1186 dst = NULL;
1187 }
1188 compress_finish(compress);
1189
1190 return dst;
1191}
1192
1193static void gt_record_fences(struct intel_gt_coredump *gt)
1194{
1195 struct i915_ggtt *ggtt = gt->_gt->ggtt;
1196 struct intel_uncore *uncore = gt->_gt->uncore;
1197 int i;
1198
1199 if (GRAPHICS_VER(uncore->i915) >= 6) {
1200 for (i = 0; i < ggtt->num_fences; i++)
1201 gt->fence[i] =
1202 intel_uncore_read64(uncore,
1203 FENCE_REG_GEN6_LO(i));
1204 } else if (GRAPHICS_VER(uncore->i915) >= 4) {
1205 for (i = 0; i < ggtt->num_fences; i++)
1206 gt->fence[i] =
1207 intel_uncore_read64(uncore,
1208 FENCE_REG_965_LO(i));
1209 } else {
1210 for (i = 0; i < ggtt->num_fences; i++)
1211 gt->fence[i] =
1212 intel_uncore_read(uncore, FENCE_REG(i));
1213 }
1214 gt->nfence = i;
1215}
1216
1217static void engine_record_registers(struct intel_engine_coredump *ee)
1218{
1219 const struct intel_engine_cs *engine = ee->engine;
1220 struct drm_i915_private *i915 = engine->i915;
1221
1222 if (GRAPHICS_VER(i915) >= 6) {
1223 ee->rc_psmi = ENGINE_READ(engine, RING_PSMI_CTL);
1224
1225 if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50))
1226 ee->fault_reg = intel_gt_mcr_read_any(engine->gt,
1227 XEHP_RING_FAULT_REG);
1228 else if (GRAPHICS_VER(i915) >= 12)
1229 ee->fault_reg = intel_uncore_read(engine->uncore,
1230 GEN12_RING_FAULT_REG);
1231 else if (GRAPHICS_VER(i915) >= 8)
1232 ee->fault_reg = intel_uncore_read(engine->uncore,
1233 GEN8_RING_FAULT_REG);
1234 else
1235 ee->fault_reg = GEN6_RING_FAULT_REG_READ(engine);
1236 }
1237
1238 if (GRAPHICS_VER(i915) >= 4) {
1239 ee->esr = ENGINE_READ(engine, RING_ESR);
1240 ee->faddr = ENGINE_READ(engine, RING_DMA_FADD);
1241 ee->ipeir = ENGINE_READ(engine, RING_IPEIR);
1242 ee->ipehr = ENGINE_READ(engine, RING_IPEHR);
1243 ee->instps = ENGINE_READ(engine, RING_INSTPS);
1244 ee->bbaddr = ENGINE_READ(engine, RING_BBADDR);
1245 ee->ccid = ENGINE_READ(engine, CCID);
1246 if (GRAPHICS_VER(i915) >= 8) {
1247 ee->faddr |= (u64)ENGINE_READ(engine, RING_DMA_FADD_UDW) << 32;
1248 ee->bbaddr |= (u64)ENGINE_READ(engine, RING_BBADDR_UDW) << 32;
1249 }
1250 ee->bbstate = ENGINE_READ(engine, RING_BBSTATE);
1251 } else {
1252 ee->faddr = ENGINE_READ(engine, DMA_FADD_I8XX);
1253 ee->ipeir = ENGINE_READ(engine, IPEIR);
1254 ee->ipehr = ENGINE_READ(engine, IPEHR);
1255 }
1256
1257 if (GRAPHICS_VER(i915) >= 11) {
1258 ee->cmd_cctl = ENGINE_READ(engine, RING_CMD_CCTL);
1259 ee->cscmdop = ENGINE_READ(engine, RING_CSCMDOP);
1260 ee->ctx_sr_ctl = ENGINE_READ(engine, RING_CTX_SR_CTL);
1261 ee->dma_faddr_hi = ENGINE_READ(engine, RING_DMA_FADD_UDW);
1262 ee->dma_faddr_lo = ENGINE_READ(engine, RING_DMA_FADD);
1263 ee->nopid = ENGINE_READ(engine, RING_NOPID);
1264 ee->excc = ENGINE_READ(engine, RING_EXCC);
1265 }
1266
1267 intel_engine_get_instdone(engine, &ee->instdone);
1268
1269 ee->instpm = ENGINE_READ(engine, RING_INSTPM);
1270 ee->acthd = intel_engine_get_active_head(engine);
1271 ee->start = ENGINE_READ(engine, RING_START);
1272 ee->head = ENGINE_READ(engine, RING_HEAD);
1273 ee->tail = ENGINE_READ(engine, RING_TAIL);
1274 ee->ctl = ENGINE_READ(engine, RING_CTL);
1275 if (GRAPHICS_VER(i915) > 2)
1276 ee->mode = ENGINE_READ(engine, RING_MI_MODE);
1277
1278 if (!HWS_NEEDS_PHYSICAL(i915)) {
1279 i915_reg_t mmio;
1280
1281 if (GRAPHICS_VER(i915) == 7) {
1282 switch (engine->id) {
1283 default:
1284 MISSING_CASE(engine->id);
1285 fallthrough;
1286 case RCS0:
1287 mmio = RENDER_HWS_PGA_GEN7;
1288 break;
1289 case BCS0:
1290 mmio = BLT_HWS_PGA_GEN7;
1291 break;
1292 case VCS0:
1293 mmio = BSD_HWS_PGA_GEN7;
1294 break;
1295 case VECS0:
1296 mmio = VEBOX_HWS_PGA_GEN7;
1297 break;
1298 }
1299 } else if (GRAPHICS_VER(engine->i915) == 6) {
1300 mmio = RING_HWS_PGA_GEN6(engine->mmio_base);
1301 } else {
1302 /* XXX: gen8 returns to sanity */
1303 mmio = RING_HWS_PGA(engine->mmio_base);
1304 }
1305
1306 ee->hws = intel_uncore_read(engine->uncore, mmio);
1307 }
1308
1309 ee->reset_count = i915_reset_engine_count(&i915->gpu_error, engine);
1310
1311 if (HAS_PPGTT(i915)) {
1312 int i;
1313
1314 ee->vm_info.gfx_mode = ENGINE_READ(engine, RING_MODE_GEN7);
1315
1316 if (GRAPHICS_VER(i915) == 6) {
1317 ee->vm_info.pp_dir_base =
1318 ENGINE_READ(engine, RING_PP_DIR_BASE_READ);
1319 } else if (GRAPHICS_VER(i915) == 7) {
1320 ee->vm_info.pp_dir_base =
1321 ENGINE_READ(engine, RING_PP_DIR_BASE);
1322 } else if (GRAPHICS_VER(i915) >= 8) {
1323 u32 base = engine->mmio_base;
1324
1325 for (i = 0; i < 4; i++) {
1326 ee->vm_info.pdp[i] =
1327 intel_uncore_read(engine->uncore,
1328 GEN8_RING_PDP_UDW(base, i));
1329 ee->vm_info.pdp[i] <<= 32;
1330 ee->vm_info.pdp[i] |=
1331 intel_uncore_read(engine->uncore,
1332 GEN8_RING_PDP_LDW(base, i));
1333 }
1334 }
1335 }
1336}
1337
1338static void record_request(const struct i915_request *request,
1339 struct i915_request_coredump *erq)
1340{
1341 erq->flags = request->fence.flags;
1342 erq->context = request->fence.context;
1343 erq->seqno = request->fence.seqno;
1344 erq->sched_attr = request->sched.attr;
1345 erq->head = request->head;
1346 erq->tail = request->tail;
1347
1348 erq->pid = 0;
1349 rcu_read_lock();
1350 if (!intel_context_is_closed(request->context)) {
1351 const struct i915_gem_context *ctx;
1352
1353 ctx = rcu_dereference(request->context->gem_context);
1354 if (ctx)
1355 erq->pid = pid_nr(ctx->pid);
1356 }
1357 rcu_read_unlock();
1358}
1359
1360static void engine_record_execlists(struct intel_engine_coredump *ee)
1361{
1362 const struct intel_engine_execlists * const el = &ee->engine->execlists;
1363 struct i915_request * const *port = el->active;
1364 unsigned int n = 0;
1365
1366 while (*port)
1367 record_request(*port++, &ee->execlist[n++]);
1368
1369 ee->num_ports = n;
1370}
1371
1372static bool record_context(struct i915_gem_context_coredump *e,
1373 const struct i915_request *rq)
1374{
1375 struct i915_gem_context *ctx;
1376 struct task_struct *task;
1377 bool simulated;
1378
1379 rcu_read_lock();
1380 ctx = rcu_dereference(rq->context->gem_context);
1381 if (ctx && !kref_get_unless_zero(&ctx->ref))
1382 ctx = NULL;
1383 rcu_read_unlock();
1384 if (!ctx)
1385 return true;
1386
1387 rcu_read_lock();
1388 task = pid_task(ctx->pid, PIDTYPE_PID);
1389 if (task) {
1390 strcpy(e->comm, task->comm);
1391 e->pid = task->pid;
1392 }
1393 rcu_read_unlock();
1394
1395 e->sched_attr = ctx->sched;
1396 e->guilty = atomic_read(&ctx->guilty_count);
1397 e->active = atomic_read(&ctx->active_count);
1398
1399 e->total_runtime = intel_context_get_total_runtime_ns(rq->context);
1400 e->avg_runtime = intel_context_get_avg_runtime_ns(rq->context);
1401
1402 simulated = i915_gem_context_no_error_capture(ctx);
1403
1404 i915_gem_context_put(ctx);
1405 return simulated;
1406}
1407
1408struct intel_engine_capture_vma {
1409 struct intel_engine_capture_vma *next;
1410 struct i915_vma_resource *vma_res;
1411 char name[16];
1412 bool lockdep_cookie;
1413};
1414
1415static struct intel_engine_capture_vma *
1416capture_vma_snapshot(struct intel_engine_capture_vma *next,
1417 struct i915_vma_resource *vma_res,
1418 gfp_t gfp, const char *name)
1419{
1420 struct intel_engine_capture_vma *c;
1421
1422 if (!vma_res)
1423 return next;
1424
1425 c = kmalloc(sizeof(*c), gfp);
1426 if (!c)
1427 return next;
1428
1429 if (!i915_vma_resource_hold(vma_res, &c->lockdep_cookie)) {
1430 kfree(c);
1431 return next;
1432 }
1433
1434 strcpy(c->name, name);
1435 c->vma_res = i915_vma_resource_get(vma_res);
1436
1437 c->next = next;
1438 return c;
1439}
1440
1441static struct intel_engine_capture_vma *
1442capture_vma(struct intel_engine_capture_vma *next,
1443 struct i915_vma *vma,
1444 const char *name,
1445 gfp_t gfp)
1446{
1447 if (!vma)
1448 return next;
1449
1450 /*
1451 * If the vma isn't pinned, then the vma should be snapshotted
1452 * to a struct i915_vma_snapshot at command submission time.
1453 * Not here.
1454 */
1455 if (GEM_WARN_ON(!i915_vma_is_pinned(vma)))
1456 return next;
1457
1458 next = capture_vma_snapshot(next, vma->resource, gfp, name);
1459
1460 return next;
1461}
1462
1463static struct intel_engine_capture_vma *
1464capture_user(struct intel_engine_capture_vma *capture,
1465 const struct i915_request *rq,
1466 gfp_t gfp)
1467{
1468 struct i915_capture_list *c;
1469
1470 for (c = rq->capture_list; c; c = c->next)
1471 capture = capture_vma_snapshot(capture, c->vma_res, gfp,
1472 "user");
1473
1474 return capture;
1475}
1476
1477static void add_vma(struct intel_engine_coredump *ee,
1478 struct i915_vma_coredump *vma)
1479{
1480 if (vma) {
1481 vma->next = ee->vma;
1482 ee->vma = vma;
1483 }
1484}
1485
1486static struct i915_vma_coredump *
1487create_vma_coredump(const struct intel_gt *gt, struct i915_vma *vma,
1488 const char *name, struct i915_vma_compress *compress)
1489{
1490 struct i915_vma_coredump *ret = NULL;
1491 struct i915_vma_resource *vma_res;
1492 bool lockdep_cookie;
1493
1494 if (!vma)
1495 return NULL;
1496
1497 vma_res = vma->resource;
1498
1499 if (i915_vma_resource_hold(vma_res, &lockdep_cookie)) {
1500 ret = i915_vma_coredump_create(gt, vma_res, compress, name);
1501 i915_vma_resource_unhold(vma_res, lockdep_cookie);
1502 }
1503
1504 return ret;
1505}
1506
1507static void add_vma_coredump(struct intel_engine_coredump *ee,
1508 const struct intel_gt *gt,
1509 struct i915_vma *vma,
1510 const char *name,
1511 struct i915_vma_compress *compress)
1512{
1513 add_vma(ee, create_vma_coredump(gt, vma, name, compress));
1514}
1515
1516struct intel_engine_coredump *
1517intel_engine_coredump_alloc(struct intel_engine_cs *engine, gfp_t gfp, u32 dump_flags)
1518{
1519 struct intel_engine_coredump *ee;
1520
1521 ee = kzalloc(sizeof(*ee), gfp);
1522 if (!ee)
1523 return NULL;
1524
1525 ee->engine = engine;
1526
1527 if (!(dump_flags & CORE_DUMP_FLAG_IS_GUC_CAPTURE)) {
1528 engine_record_registers(ee);
1529 engine_record_execlists(ee);
1530 }
1531
1532 return ee;
1533}
1534
1535struct intel_engine_capture_vma *
1536intel_engine_coredump_add_request(struct intel_engine_coredump *ee,
1537 struct i915_request *rq,
1538 gfp_t gfp)
1539{
1540 struct intel_engine_capture_vma *vma = NULL;
1541
1542 ee->simulated |= record_context(&ee->context, rq);
1543 if (ee->simulated)
1544 return NULL;
1545
1546 /*
1547 * We need to copy these to an anonymous buffer
1548 * as the simplest method to avoid being overwritten
1549 * by userspace.
1550 */
1551 vma = capture_vma_snapshot(vma, rq->batch_res, gfp, "batch");
1552 vma = capture_user(vma, rq, gfp);
1553 vma = capture_vma(vma, rq->ring->vma, "ring", gfp);
1554 vma = capture_vma(vma, rq->context->state, "HW context", gfp);
1555
1556 ee->rq_head = rq->head;
1557 ee->rq_post = rq->postfix;
1558 ee->rq_tail = rq->tail;
1559
1560 return vma;
1561}
1562
1563void
1564intel_engine_coredump_add_vma(struct intel_engine_coredump *ee,
1565 struct intel_engine_capture_vma *capture,
1566 struct i915_vma_compress *compress)
1567{
1568 const struct intel_engine_cs *engine = ee->engine;
1569
1570 while (capture) {
1571 struct intel_engine_capture_vma *this = capture;
1572 struct i915_vma_resource *vma_res = this->vma_res;
1573
1574 add_vma(ee,
1575 i915_vma_coredump_create(engine->gt, vma_res,
1576 compress, this->name));
1577
1578 i915_vma_resource_unhold(vma_res, this->lockdep_cookie);
1579 i915_vma_resource_put(vma_res);
1580
1581 capture = this->next;
1582 kfree(this);
1583 }
1584
1585 add_vma_coredump(ee, engine->gt, engine->status_page.vma,
1586 "HW Status", compress);
1587
1588 add_vma_coredump(ee, engine->gt, engine->wa_ctx.vma,
1589 "WA context", compress);
1590}
1591
1592static struct intel_engine_coredump *
1593capture_engine(struct intel_engine_cs *engine,
1594 struct i915_vma_compress *compress,
1595 u32 dump_flags)
1596{
1597 struct intel_engine_capture_vma *capture = NULL;
1598 struct intel_engine_coredump *ee;
1599 struct intel_context *ce = NULL;
1600 struct i915_request *rq = NULL;
1601
1602 ee = intel_engine_coredump_alloc(engine, ALLOW_FAIL, dump_flags);
1603 if (!ee)
1604 return NULL;
1605
1606 intel_engine_get_hung_entity(engine, &ce, &rq);
1607 if (!rq || !i915_request_started(rq))
1608 goto no_request_capture;
1609
1610 capture = intel_engine_coredump_add_request(ee, rq, ATOMIC_MAYFAIL);
1611 if (!capture)
1612 goto no_request_capture;
1613 if (dump_flags & CORE_DUMP_FLAG_IS_GUC_CAPTURE)
1614 intel_guc_capture_get_matching_node(engine->gt, ee, ce);
1615
1616 intel_engine_coredump_add_vma(ee, capture, compress);
1617 i915_request_put(rq);
1618
1619 return ee;
1620
1621no_request_capture:
1622 if (rq)
1623 i915_request_put(rq);
1624 kfree(ee);
1625 return NULL;
1626}
1627
1628static void
1629gt_record_engines(struct intel_gt_coredump *gt,
1630 intel_engine_mask_t engine_mask,
1631 struct i915_vma_compress *compress,
1632 u32 dump_flags)
1633{
1634 struct intel_engine_cs *engine;
1635 enum intel_engine_id id;
1636
1637 for_each_engine(engine, gt->_gt, id) {
1638 struct intel_engine_coredump *ee;
1639
1640 /* Refill our page pool before entering atomic section */
1641 pool_refill(&compress->pool, ALLOW_FAIL);
1642
1643 ee = capture_engine(engine, compress, dump_flags);
1644 if (!ee)
1645 continue;
1646
1647 ee->hung = engine->mask & engine_mask;
1648
1649 gt->simulated |= ee->simulated;
1650 if (ee->simulated) {
1651 if (dump_flags & CORE_DUMP_FLAG_IS_GUC_CAPTURE)
1652 intel_guc_capture_free_node(ee);
1653 kfree(ee);
1654 continue;
1655 }
1656
1657 ee->next = gt->engine;
1658 gt->engine = ee;
1659 }
1660}
1661
1662static void gt_record_guc_ctb(struct intel_ctb_coredump *saved,
1663 const struct intel_guc_ct_buffer *ctb,
1664 const void *blob_ptr, struct intel_guc *guc)
1665{
1666 if (!ctb || !ctb->desc)
1667 return;
1668
1669 saved->raw_status = ctb->desc->status;
1670 saved->raw_head = ctb->desc->head;
1671 saved->raw_tail = ctb->desc->tail;
1672 saved->head = ctb->head;
1673 saved->tail = ctb->tail;
1674 saved->size = ctb->size;
1675 saved->desc_offset = ((void *)ctb->desc) - blob_ptr;
1676 saved->cmds_offset = ((void *)ctb->cmds) - blob_ptr;
1677}
1678
1679static struct intel_uc_coredump *
1680gt_record_uc(struct intel_gt_coredump *gt,
1681 struct i915_vma_compress *compress)
1682{
1683 const struct intel_uc *uc = >->_gt->uc;
1684 struct intel_uc_coredump *error_uc;
1685
1686 error_uc = kzalloc(sizeof(*error_uc), ALLOW_FAIL);
1687 if (!error_uc)
1688 return NULL;
1689
1690 memcpy(&error_uc->guc_fw, &uc->guc.fw, sizeof(uc->guc.fw));
1691 memcpy(&error_uc->huc_fw, &uc->huc.fw, sizeof(uc->huc.fw));
1692
1693 error_uc->guc_fw.file_selected.path = kstrdup(uc->guc.fw.file_selected.path, ALLOW_FAIL);
1694 error_uc->huc_fw.file_selected.path = kstrdup(uc->huc.fw.file_selected.path, ALLOW_FAIL);
1695 error_uc->guc_fw.file_wanted.path = kstrdup(uc->guc.fw.file_wanted.path, ALLOW_FAIL);
1696 error_uc->huc_fw.file_wanted.path = kstrdup(uc->huc.fw.file_wanted.path, ALLOW_FAIL);
1697
1698 /*
1699 * Save the GuC log and include a timestamp reference for converting the
1700 * log times to system times (in conjunction with the error->boottime and
1701 * gt->clock_frequency fields saved elsewhere).
1702 */
1703 error_uc->guc.timestamp = intel_uncore_read(gt->_gt->uncore, GUCPMTIMESTAMP);
1704 error_uc->guc.vma_log = create_vma_coredump(gt->_gt, uc->guc.log.vma,
1705 "GuC log buffer", compress);
1706 error_uc->guc.vma_ctb = create_vma_coredump(gt->_gt, uc->guc.ct.vma,
1707 "GuC CT buffer", compress);
1708 error_uc->guc.last_fence = uc->guc.ct.requests.last_fence;
1709 gt_record_guc_ctb(error_uc->guc.ctb + 0, &uc->guc.ct.ctbs.send,
1710 uc->guc.ct.ctbs.send.desc, (struct intel_guc *)&uc->guc);
1711 gt_record_guc_ctb(error_uc->guc.ctb + 1, &uc->guc.ct.ctbs.recv,
1712 uc->guc.ct.ctbs.send.desc, (struct intel_guc *)&uc->guc);
1713
1714 return error_uc;
1715}
1716
1717/* Capture display registers. */
1718static void gt_record_display_regs(struct intel_gt_coredump *gt)
1719{
1720 struct intel_uncore *uncore = gt->_gt->uncore;
1721 struct drm_i915_private *i915 = uncore->i915;
1722
1723 if (GRAPHICS_VER(i915) >= 6)
1724 gt->derrmr = intel_uncore_read(uncore, DERRMR);
1725
1726 if (GRAPHICS_VER(i915) >= 8)
1727 gt->ier = intel_uncore_read(uncore, GEN8_DE_MISC_IER);
1728 else if (IS_VALLEYVIEW(i915))
1729 gt->ier = intel_uncore_read(uncore, VLV_IER);
1730 else if (HAS_PCH_SPLIT(i915))
1731 gt->ier = intel_uncore_read(uncore, DEIER);
1732 else if (GRAPHICS_VER(i915) == 2)
1733 gt->ier = intel_uncore_read16(uncore, GEN2_IER);
1734 else
1735 gt->ier = intel_uncore_read(uncore, GEN2_IER);
1736}
1737
1738/* Capture all other registers that GuC doesn't capture. */
1739static void gt_record_global_nonguc_regs(struct intel_gt_coredump *gt)
1740{
1741 struct intel_uncore *uncore = gt->_gt->uncore;
1742 struct drm_i915_private *i915 = uncore->i915;
1743 int i;
1744
1745 if (IS_VALLEYVIEW(i915)) {
1746 gt->gtier[0] = intel_uncore_read(uncore, GTIER);
1747 gt->ngtier = 1;
1748 } else if (GRAPHICS_VER(i915) >= 11) {
1749 gt->gtier[0] =
1750 intel_uncore_read(uncore,
1751 GEN11_RENDER_COPY_INTR_ENABLE);
1752 gt->gtier[1] =
1753 intel_uncore_read(uncore, GEN11_VCS_VECS_INTR_ENABLE);
1754 gt->gtier[2] =
1755 intel_uncore_read(uncore, GEN11_GUC_SG_INTR_ENABLE);
1756 gt->gtier[3] =
1757 intel_uncore_read(uncore,
1758 GEN11_GPM_WGBOXPERF_INTR_ENABLE);
1759 gt->gtier[4] =
1760 intel_uncore_read(uncore,
1761 GEN11_CRYPTO_RSVD_INTR_ENABLE);
1762 gt->gtier[5] =
1763 intel_uncore_read(uncore,
1764 GEN11_GUNIT_CSME_INTR_ENABLE);
1765 gt->ngtier = 6;
1766 } else if (GRAPHICS_VER(i915) >= 8) {
1767 for (i = 0; i < 4; i++)
1768 gt->gtier[i] =
1769 intel_uncore_read(uncore, GEN8_GT_IER(i));
1770 gt->ngtier = 4;
1771 } else if (HAS_PCH_SPLIT(i915)) {
1772 gt->gtier[0] = intel_uncore_read(uncore, GTIER);
1773 gt->ngtier = 1;
1774 }
1775
1776 gt->eir = intel_uncore_read(uncore, EIR);
1777 gt->pgtbl_er = intel_uncore_read(uncore, PGTBL_ER);
1778}
1779
1780/*
1781 * Capture all registers that relate to workload submission.
1782 * NOTE: In GuC submission, when GuC resets an engine, it can dump these for us
1783 */
1784static void gt_record_global_regs(struct intel_gt_coredump *gt)
1785{
1786 struct intel_uncore *uncore = gt->_gt->uncore;
1787 struct drm_i915_private *i915 = uncore->i915;
1788 int i;
1789
1790 /*
1791 * General organization
1792 * 1. Registers specific to a single generation
1793 * 2. Registers which belong to multiple generations
1794 * 3. Feature specific registers.
1795 * 4. Everything else
1796 * Please try to follow the order.
1797 */
1798
1799 /* 1: Registers specific to a single generation */
1800 if (IS_VALLEYVIEW(i915))
1801 gt->forcewake = intel_uncore_read_fw(uncore, FORCEWAKE_VLV);
1802
1803 if (GRAPHICS_VER(i915) == 7)
1804 gt->err_int = intel_uncore_read(uncore, GEN7_ERR_INT);
1805
1806 if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50)) {
1807 gt->fault_data0 = intel_gt_mcr_read_any((struct intel_gt *)gt->_gt,
1808 XEHP_FAULT_TLB_DATA0);
1809 gt->fault_data1 = intel_gt_mcr_read_any((struct intel_gt *)gt->_gt,
1810 XEHP_FAULT_TLB_DATA1);
1811 } else if (GRAPHICS_VER(i915) >= 12) {
1812 gt->fault_data0 = intel_uncore_read(uncore,
1813 GEN12_FAULT_TLB_DATA0);
1814 gt->fault_data1 = intel_uncore_read(uncore,
1815 GEN12_FAULT_TLB_DATA1);
1816 } else if (GRAPHICS_VER(i915) >= 8) {
1817 gt->fault_data0 = intel_uncore_read(uncore,
1818 GEN8_FAULT_TLB_DATA0);
1819 gt->fault_data1 = intel_uncore_read(uncore,
1820 GEN8_FAULT_TLB_DATA1);
1821 }
1822
1823 if (GRAPHICS_VER(i915) == 6) {
1824 gt->forcewake = intel_uncore_read_fw(uncore, FORCEWAKE);
1825 gt->gab_ctl = intel_uncore_read(uncore, GAB_CTL);
1826 gt->gfx_mode = intel_uncore_read(uncore, GFX_MODE);
1827 }
1828
1829 /* 2: Registers which belong to multiple generations */
1830 if (GRAPHICS_VER(i915) >= 7)
1831 gt->forcewake = intel_uncore_read_fw(uncore, FORCEWAKE_MT);
1832
1833 if (GRAPHICS_VER(i915) >= 6) {
1834 if (GRAPHICS_VER(i915) < 12) {
1835 gt->error = intel_uncore_read(uncore, ERROR_GEN6);
1836 gt->done_reg = intel_uncore_read(uncore, DONE_REG);
1837 }
1838 }
1839
1840 /* 3: Feature specific registers */
1841 if (IS_GRAPHICS_VER(i915, 6, 7)) {
1842 gt->gam_ecochk = intel_uncore_read(uncore, GAM_ECOCHK);
1843 gt->gac_eco = intel_uncore_read(uncore, GAC_ECO_BITS);
1844 }
1845
1846 if (IS_GRAPHICS_VER(i915, 8, 11))
1847 gt->gtt_cache = intel_uncore_read(uncore, HSW_GTT_CACHE_EN);
1848
1849 if (GRAPHICS_VER(i915) == 12)
1850 gt->aux_err = intel_uncore_read(uncore, GEN12_AUX_ERR_DBG);
1851
1852 if (GRAPHICS_VER(i915) >= 12) {
1853 for (i = 0; i < I915_MAX_SFC; i++) {
1854 /*
1855 * SFC_DONE resides in the VD forcewake domain, so it
1856 * only exists if the corresponding VCS engine is
1857 * present.
1858 */
1859 if ((gt->_gt->info.sfc_mask & BIT(i)) == 0 ||
1860 !HAS_ENGINE(gt->_gt, _VCS(i * 2)))
1861 continue;
1862
1863 gt->sfc_done[i] =
1864 intel_uncore_read(uncore, GEN12_SFC_DONE(i));
1865 }
1866
1867 gt->gam_done = intel_uncore_read(uncore, GEN12_GAM_DONE);
1868 }
1869}
1870
1871static void gt_record_info(struct intel_gt_coredump *gt)
1872{
1873 memcpy(>->info, >->_gt->info, sizeof(struct intel_gt_info));
1874 gt->clock_frequency = gt->_gt->clock_frequency;
1875 gt->clock_period_ns = gt->_gt->clock_period_ns;
1876}
1877
1878/*
1879 * Generate a semi-unique error code. The code is not meant to have meaning, The
1880 * code's only purpose is to try to prevent false duplicated bug reports by
1881 * grossly estimating a GPU error state.
1882 *
1883 * TODO Ideally, hashing the batchbuffer would be a very nice way to determine
1884 * the hang if we could strip the GTT offset information from it.
1885 *
1886 * It's only a small step better than a random number in its current form.
1887 */
1888static u32 generate_ecode(const struct intel_engine_coredump *ee)
1889{
1890 /*
1891 * IPEHR would be an ideal way to detect errors, as it's the gross
1892 * measure of "the command that hung." However, has some very common
1893 * synchronization commands which almost always appear in the case
1894 * strictly a client bug. Use instdone to differentiate those some.
1895 */
1896 return ee ? ee->ipehr ^ ee->instdone.instdone : 0;
1897}
1898
1899static const char *error_msg(struct i915_gpu_coredump *error)
1900{
1901 struct intel_engine_coredump *first = NULL;
1902 unsigned int hung_classes = 0;
1903 struct intel_gt_coredump *gt;
1904 int len;
1905
1906 for (gt = error->gt; gt; gt = gt->next) {
1907 struct intel_engine_coredump *cs;
1908
1909 for (cs = gt->engine; cs; cs = cs->next) {
1910 if (cs->hung) {
1911 hung_classes |= BIT(cs->engine->uabi_class);
1912 if (!first)
1913 first = cs;
1914 }
1915 }
1916 }
1917
1918 len = scnprintf(error->error_msg, sizeof(error->error_msg),
1919 "GPU HANG: ecode %d:%x:%08x",
1920 GRAPHICS_VER(error->i915), hung_classes,
1921 generate_ecode(first));
1922 if (first && first->context.pid) {
1923 /* Just show the first executing process, more is confusing */
1924 len += scnprintf(error->error_msg + len,
1925 sizeof(error->error_msg) - len,
1926 ", in %s [%d]",
1927 first->context.comm, first->context.pid);
1928 }
1929
1930 return error->error_msg;
1931}
1932
1933static void capture_gen(struct i915_gpu_coredump *error)
1934{
1935 struct drm_i915_private *i915 = error->i915;
1936
1937 error->wakelock = atomic_read(&i915->runtime_pm.wakeref_count);
1938 error->suspended = i915->runtime_pm.suspended;
1939
1940 error->iommu = i915_vtd_active(i915);
1941 error->reset_count = i915_reset_count(&i915->gpu_error);
1942 error->suspend_count = i915->suspend_count;
1943
1944 i915_params_copy(&error->params, &i915->params);
1945 memcpy(&error->device_info,
1946 INTEL_INFO(i915),
1947 sizeof(error->device_info));
1948 memcpy(&error->runtime_info,
1949 RUNTIME_INFO(i915),
1950 sizeof(error->runtime_info));
1951 error->driver_caps = i915->caps;
1952}
1953
1954struct i915_gpu_coredump *
1955i915_gpu_coredump_alloc(struct drm_i915_private *i915, gfp_t gfp)
1956{
1957 struct i915_gpu_coredump *error;
1958
1959 if (!i915->params.error_capture)
1960 return NULL;
1961
1962 error = kzalloc(sizeof(*error), gfp);
1963 if (!error)
1964 return NULL;
1965
1966 kref_init(&error->ref);
1967 error->i915 = i915;
1968
1969 error->time = ktime_get_real();
1970 error->boottime = ktime_get_boottime();
1971 error->uptime = ktime_sub(ktime_get(), to_gt(i915)->last_init_time);
1972 error->capture = jiffies;
1973
1974 capture_gen(error);
1975
1976 return error;
1977}
1978
1979#define DAY_AS_SECONDS(x) (24 * 60 * 60 * (x))
1980
1981struct intel_gt_coredump *
1982intel_gt_coredump_alloc(struct intel_gt *gt, gfp_t gfp, u32 dump_flags)
1983{
1984 struct intel_gt_coredump *gc;
1985
1986 gc = kzalloc(sizeof(*gc), gfp);
1987 if (!gc)
1988 return NULL;
1989
1990 gc->_gt = gt;
1991 gc->awake = intel_gt_pm_is_awake(gt);
1992
1993 gt_record_display_regs(gc);
1994 gt_record_global_nonguc_regs(gc);
1995
1996 /*
1997 * GuC dumps global, eng-class and eng-instance registers
1998 * (that can change as part of engine state during execution)
1999 * before an engine is reset due to a hung context.
2000 * GuC captures and reports all three groups of registers
2001 * together as a single set before the engine is reset.
2002 * Thus, if GuC triggered the context reset we retrieve
2003 * the register values as part of gt_record_engines.
2004 */
2005 if (!(dump_flags & CORE_DUMP_FLAG_IS_GUC_CAPTURE))
2006 gt_record_global_regs(gc);
2007
2008 gt_record_fences(gc);
2009
2010 return gc;
2011}
2012
2013struct i915_vma_compress *
2014i915_vma_capture_prepare(struct intel_gt_coredump *gt)
2015{
2016 struct i915_vma_compress *compress;
2017
2018 compress = kmalloc(sizeof(*compress), ALLOW_FAIL);
2019 if (!compress)
2020 return NULL;
2021
2022 if (!compress_init(compress)) {
2023 kfree(compress);
2024 return NULL;
2025 }
2026
2027 return compress;
2028}
2029
2030void i915_vma_capture_finish(struct intel_gt_coredump *gt,
2031 struct i915_vma_compress *compress)
2032{
2033 if (!compress)
2034 return;
2035
2036 compress_fini(compress);
2037 kfree(compress);
2038}
2039
2040static struct i915_gpu_coredump *
2041__i915_gpu_coredump(struct intel_gt *gt, intel_engine_mask_t engine_mask, u32 dump_flags)
2042{
2043 struct drm_i915_private *i915 = gt->i915;
2044 struct i915_gpu_coredump *error;
2045
2046 /* Check if GPU capture has been disabled */
2047 error = READ_ONCE(i915->gpu_error.first_error);
2048 if (IS_ERR(error))
2049 return error;
2050
2051 error = i915_gpu_coredump_alloc(i915, ALLOW_FAIL);
2052 if (!error)
2053 return ERR_PTR(-ENOMEM);
2054
2055 error->gt = intel_gt_coredump_alloc(gt, ALLOW_FAIL, dump_flags);
2056 if (error->gt) {
2057 struct i915_vma_compress *compress;
2058
2059 compress = i915_vma_capture_prepare(error->gt);
2060 if (!compress) {
2061 kfree(error->gt);
2062 kfree(error);
2063 return ERR_PTR(-ENOMEM);
2064 }
2065
2066 if (INTEL_INFO(i915)->has_gt_uc) {
2067 error->gt->uc = gt_record_uc(error->gt, compress);
2068 if (error->gt->uc) {
2069 if (dump_flags & CORE_DUMP_FLAG_IS_GUC_CAPTURE)
2070 error->gt->uc->guc.is_guc_capture = true;
2071 else
2072 GEM_BUG_ON(error->gt->uc->guc.is_guc_capture);
2073 }
2074 }
2075
2076 gt_record_info(error->gt);
2077 gt_record_engines(error->gt, engine_mask, compress, dump_flags);
2078
2079
2080 i915_vma_capture_finish(error->gt, compress);
2081
2082 error->simulated |= error->gt->simulated;
2083 }
2084
2085 error->overlay = intel_overlay_capture_error_state(i915);
2086
2087 return error;
2088}
2089
2090struct i915_gpu_coredump *
2091i915_gpu_coredump(struct intel_gt *gt, intel_engine_mask_t engine_mask, u32 dump_flags)
2092{
2093 static DEFINE_MUTEX(capture_mutex);
2094 int ret = mutex_lock_interruptible(&capture_mutex);
2095 struct i915_gpu_coredump *dump;
2096
2097 if (ret)
2098 return ERR_PTR(ret);
2099
2100 dump = __i915_gpu_coredump(gt, engine_mask, dump_flags);
2101 mutex_unlock(&capture_mutex);
2102
2103 return dump;
2104}
2105
2106void i915_error_state_store(struct i915_gpu_coredump *error)
2107{
2108 struct drm_i915_private *i915;
2109 static bool warned;
2110
2111 if (IS_ERR_OR_NULL(error))
2112 return;
2113
2114 i915 = error->i915;
2115 drm_info(&i915->drm, "%s\n", error_msg(error));
2116
2117 if (error->simulated ||
2118 cmpxchg(&i915->gpu_error.first_error, NULL, error))
2119 return;
2120
2121 i915_gpu_coredump_get(error);
2122
2123 if (!xchg(&warned, true) &&
2124 ktime_get_real_seconds() - DRIVER_TIMESTAMP < DAY_AS_SECONDS(180)) {
2125 pr_info("GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.\n");
2126 pr_info("Please file a _new_ bug report at https://gitlab.freedesktop.org/drm/intel/issues/new.\n");
2127 pr_info("Please see https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs for details.\n");
2128 pr_info("drm/i915 developers can then reassign to the right component if it's not a kernel issue.\n");
2129 pr_info("The GPU crash dump is required to analyze GPU hangs, so please always attach it.\n");
2130 pr_info("GPU crash dump saved to /sys/class/drm/card%d/error\n",
2131 i915->drm.primary->index);
2132 }
2133}
2134
2135/**
2136 * i915_capture_error_state - capture an error record for later analysis
2137 * @gt: intel_gt which originated the hang
2138 * @engine_mask: hung engines
2139 *
2140 *
2141 * Should be called when an error is detected (either a hang or an error
2142 * interrupt) to capture error state from the time of the error. Fills
2143 * out a structure which becomes available in debugfs for user level tools
2144 * to pick up.
2145 */
2146void i915_capture_error_state(struct intel_gt *gt,
2147 intel_engine_mask_t engine_mask, u32 dump_flags)
2148{
2149 struct i915_gpu_coredump *error;
2150
2151 error = i915_gpu_coredump(gt, engine_mask, dump_flags);
2152 if (IS_ERR(error)) {
2153 cmpxchg(>->i915->gpu_error.first_error, NULL, error);
2154 return;
2155 }
2156
2157 i915_error_state_store(error);
2158 i915_gpu_coredump_put(error);
2159}
2160
2161struct i915_gpu_coredump *
2162i915_first_error_state(struct drm_i915_private *i915)
2163{
2164 struct i915_gpu_coredump *error;
2165
2166 spin_lock_irq(&i915->gpu_error.lock);
2167 error = i915->gpu_error.first_error;
2168 if (!IS_ERR_OR_NULL(error))
2169 i915_gpu_coredump_get(error);
2170 spin_unlock_irq(&i915->gpu_error.lock);
2171
2172 return error;
2173}
2174
2175void i915_reset_error_state(struct drm_i915_private *i915)
2176{
2177 struct i915_gpu_coredump *error;
2178
2179 spin_lock_irq(&i915->gpu_error.lock);
2180 error = i915->gpu_error.first_error;
2181 if (error != ERR_PTR(-ENODEV)) /* if disabled, always disabled */
2182 i915->gpu_error.first_error = NULL;
2183 spin_unlock_irq(&i915->gpu_error.lock);
2184
2185 if (!IS_ERR_OR_NULL(error))
2186 i915_gpu_coredump_put(error);
2187}
2188
2189void i915_disable_error_state(struct drm_i915_private *i915, int err)
2190{
2191 spin_lock_irq(&i915->gpu_error.lock);
2192 if (!i915->gpu_error.first_error)
2193 i915->gpu_error.first_error = ERR_PTR(err);
2194 spin_unlock_irq(&i915->gpu_error.lock);
2195}