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Merge tag 'nios2-v3.20-rc1' of git://git.rocketboards.org/linux-socfpga-next
[mirror_ubuntu-artful-kernel.git] / drivers / gpu / drm / i915 / i915_gpu_error.c
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
33 static const char *yesno(int v)
34 {
35 return v ? "yes" : "no";
36 }
37
38 static const char *ring_str(int ring)
39 {
40 switch (ring) {
41 case RCS: return "render";
42 case VCS: return "bsd";
43 case BCS: return "blt";
44 case VECS: return "vebox";
45 case VCS2: return "bsd2";
46 default: return "";
47 }
48 }
49
50 static const char *pin_flag(int pinned)
51 {
52 if (pinned > 0)
53 return " P";
54 else if (pinned < 0)
55 return " p";
56 else
57 return "";
58 }
59
60 static const char *tiling_flag(int tiling)
61 {
62 switch (tiling) {
63 default:
64 case I915_TILING_NONE: return "";
65 case I915_TILING_X: return " X";
66 case I915_TILING_Y: return " Y";
67 }
68 }
69
70 static const char *dirty_flag(int dirty)
71 {
72 return dirty ? " dirty" : "";
73 }
74
75 static const char *purgeable_flag(int purgeable)
76 {
77 return purgeable ? " purgeable" : "";
78 }
79
80 static bool __i915_error_ok(struct drm_i915_error_state_buf *e)
81 {
82
83 if (!e->err && WARN(e->bytes > (e->size - 1), "overflow")) {
84 e->err = -ENOSPC;
85 return false;
86 }
87
88 if (e->bytes == e->size - 1 || e->err)
89 return false;
90
91 return true;
92 }
93
94 static bool __i915_error_seek(struct drm_i915_error_state_buf *e,
95 unsigned len)
96 {
97 if (e->pos + len <= e->start) {
98 e->pos += len;
99 return false;
100 }
101
102 /* First vsnprintf needs to fit in its entirety for memmove */
103 if (len >= e->size) {
104 e->err = -EIO;
105 return false;
106 }
107
108 return true;
109 }
110
111 static void __i915_error_advance(struct drm_i915_error_state_buf *e,
112 unsigned len)
113 {
114 /* If this is first printf in this window, adjust it so that
115 * start position matches start of the buffer
116 */
117
118 if (e->pos < e->start) {
119 const size_t off = e->start - e->pos;
120
121 /* Should not happen but be paranoid */
122 if (off > len || e->bytes) {
123 e->err = -EIO;
124 return;
125 }
126
127 memmove(e->buf, e->buf + off, len - off);
128 e->bytes = len - off;
129 e->pos = e->start;
130 return;
131 }
132
133 e->bytes += len;
134 e->pos += len;
135 }
136
137 static void i915_error_vprintf(struct drm_i915_error_state_buf *e,
138 const char *f, va_list args)
139 {
140 unsigned len;
141
142 if (!__i915_error_ok(e))
143 return;
144
145 /* Seek the first printf which is hits start position */
146 if (e->pos < e->start) {
147 va_list tmp;
148
149 va_copy(tmp, args);
150 len = vsnprintf(NULL, 0, f, tmp);
151 va_end(tmp);
152
153 if (!__i915_error_seek(e, len))
154 return;
155 }
156
157 len = vsnprintf(e->buf + e->bytes, e->size - e->bytes, f, args);
158 if (len >= e->size - e->bytes)
159 len = e->size - e->bytes - 1;
160
161 __i915_error_advance(e, len);
162 }
163
164 static void i915_error_puts(struct drm_i915_error_state_buf *e,
165 const char *str)
166 {
167 unsigned len;
168
169 if (!__i915_error_ok(e))
170 return;
171
172 len = strlen(str);
173
174 /* Seek the first printf which is hits start position */
175 if (e->pos < e->start) {
176 if (!__i915_error_seek(e, len))
177 return;
178 }
179
180 if (len >= e->size - e->bytes)
181 len = e->size - e->bytes - 1;
182 memcpy(e->buf + e->bytes, str, len);
183
184 __i915_error_advance(e, len);
185 }
186
187 #define err_printf(e, ...) i915_error_printf(e, __VA_ARGS__)
188 #define err_puts(e, s) i915_error_puts(e, s)
189
190 static void print_error_buffers(struct drm_i915_error_state_buf *m,
191 const char *name,
192 struct drm_i915_error_buffer *err,
193 int count)
194 {
195 err_printf(m, " %s [%d]:\n", name, count);
196
197 while (count--) {
198 err_printf(m, " %08x %8u %02x %02x %x %x",
199 err->gtt_offset,
200 err->size,
201 err->read_domains,
202 err->write_domain,
203 err->rseqno, err->wseqno);
204 err_puts(m, pin_flag(err->pinned));
205 err_puts(m, tiling_flag(err->tiling));
206 err_puts(m, dirty_flag(err->dirty));
207 err_puts(m, purgeable_flag(err->purgeable));
208 err_puts(m, err->userptr ? " userptr" : "");
209 err_puts(m, err->ring != -1 ? " " : "");
210 err_puts(m, ring_str(err->ring));
211 err_puts(m, i915_cache_level_str(m->i915, err->cache_level));
212
213 if (err->name)
214 err_printf(m, " (name: %d)", err->name);
215 if (err->fence_reg != I915_FENCE_REG_NONE)
216 err_printf(m, " (fence: %d)", err->fence_reg);
217
218 err_puts(m, "\n");
219 err++;
220 }
221 }
222
223 static const char *hangcheck_action_to_str(enum intel_ring_hangcheck_action a)
224 {
225 switch (a) {
226 case HANGCHECK_IDLE:
227 return "idle";
228 case HANGCHECK_WAIT:
229 return "wait";
230 case HANGCHECK_ACTIVE:
231 return "active";
232 case HANGCHECK_ACTIVE_LOOP:
233 return "active (loop)";
234 case HANGCHECK_KICK:
235 return "kick";
236 case HANGCHECK_HUNG:
237 return "hung";
238 }
239
240 return "unknown";
241 }
242
243 static void i915_ring_error_state(struct drm_i915_error_state_buf *m,
244 struct drm_device *dev,
245 struct drm_i915_error_state *error,
246 int ring_idx)
247 {
248 struct drm_i915_error_ring *ring = &error->ring[ring_idx];
249
250 if (!ring->valid)
251 return;
252
253 err_printf(m, "%s command stream:\n", ring_str(ring_idx));
254 err_printf(m, " HEAD: 0x%08x\n", ring->head);
255 err_printf(m, " TAIL: 0x%08x\n", ring->tail);
256 err_printf(m, " CTL: 0x%08x\n", ring->ctl);
257 err_printf(m, " HWS: 0x%08x\n", ring->hws);
258 err_printf(m, " ACTHD: 0x%08x %08x\n", (u32)(ring->acthd>>32), (u32)ring->acthd);
259 err_printf(m, " IPEIR: 0x%08x\n", ring->ipeir);
260 err_printf(m, " IPEHR: 0x%08x\n", ring->ipehr);
261 err_printf(m, " INSTDONE: 0x%08x\n", ring->instdone);
262 if (INTEL_INFO(dev)->gen >= 4) {
263 err_printf(m, " BBADDR: 0x%08x %08x\n", (u32)(ring->bbaddr>>32), (u32)ring->bbaddr);
264 err_printf(m, " BB_STATE: 0x%08x\n", ring->bbstate);
265 err_printf(m, " INSTPS: 0x%08x\n", ring->instps);
266 }
267 err_printf(m, " INSTPM: 0x%08x\n", ring->instpm);
268 err_printf(m, " FADDR: 0x%08x %08x\n", upper_32_bits(ring->faddr),
269 lower_32_bits(ring->faddr));
270 if (INTEL_INFO(dev)->gen >= 6) {
271 err_printf(m, " RC PSMI: 0x%08x\n", ring->rc_psmi);
272 err_printf(m, " FAULT_REG: 0x%08x\n", ring->fault_reg);
273 err_printf(m, " SYNC_0: 0x%08x [last synced 0x%08x]\n",
274 ring->semaphore_mboxes[0],
275 ring->semaphore_seqno[0]);
276 err_printf(m, " SYNC_1: 0x%08x [last synced 0x%08x]\n",
277 ring->semaphore_mboxes[1],
278 ring->semaphore_seqno[1]);
279 if (HAS_VEBOX(dev)) {
280 err_printf(m, " SYNC_2: 0x%08x [last synced 0x%08x]\n",
281 ring->semaphore_mboxes[2],
282 ring->semaphore_seqno[2]);
283 }
284 }
285 if (USES_PPGTT(dev)) {
286 err_printf(m, " GFX_MODE: 0x%08x\n", ring->vm_info.gfx_mode);
287
288 if (INTEL_INFO(dev)->gen >= 8) {
289 int i;
290 for (i = 0; i < 4; i++)
291 err_printf(m, " PDP%d: 0x%016llx\n",
292 i, ring->vm_info.pdp[i]);
293 } else {
294 err_printf(m, " PP_DIR_BASE: 0x%08x\n",
295 ring->vm_info.pp_dir_base);
296 }
297 }
298 err_printf(m, " seqno: 0x%08x\n", ring->seqno);
299 err_printf(m, " waiting: %s\n", yesno(ring->waiting));
300 err_printf(m, " ring->head: 0x%08x\n", ring->cpu_ring_head);
301 err_printf(m, " ring->tail: 0x%08x\n", ring->cpu_ring_tail);
302 err_printf(m, " hangcheck: %s [%d]\n",
303 hangcheck_action_to_str(ring->hangcheck_action),
304 ring->hangcheck_score);
305 }
306
307 void i915_error_printf(struct drm_i915_error_state_buf *e, const char *f, ...)
308 {
309 va_list args;
310
311 va_start(args, f);
312 i915_error_vprintf(e, f, args);
313 va_end(args);
314 }
315
316 static void print_error_obj(struct drm_i915_error_state_buf *m,
317 struct drm_i915_error_object *obj)
318 {
319 int page, offset, elt;
320
321 for (page = offset = 0; page < obj->page_count; page++) {
322 for (elt = 0; elt < PAGE_SIZE/4; elt++) {
323 err_printf(m, "%08x : %08x\n", offset,
324 obj->pages[page][elt]);
325 offset += 4;
326 }
327 }
328 }
329
330 int i915_error_state_to_str(struct drm_i915_error_state_buf *m,
331 const struct i915_error_state_file_priv *error_priv)
332 {
333 struct drm_device *dev = error_priv->dev;
334 struct drm_i915_private *dev_priv = dev->dev_private;
335 struct drm_i915_error_state *error = error_priv->error;
336 struct drm_i915_error_object *obj;
337 int i, j, offset, elt;
338 int max_hangcheck_score;
339
340 if (!error) {
341 err_printf(m, "no error state collected\n");
342 goto out;
343 }
344
345 err_printf(m, "%s\n", error->error_msg);
346 err_printf(m, "Time: %ld s %ld us\n", error->time.tv_sec,
347 error->time.tv_usec);
348 err_printf(m, "Kernel: " UTS_RELEASE "\n");
349 max_hangcheck_score = 0;
350 for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
351 if (error->ring[i].hangcheck_score > max_hangcheck_score)
352 max_hangcheck_score = error->ring[i].hangcheck_score;
353 }
354 for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
355 if (error->ring[i].hangcheck_score == max_hangcheck_score &&
356 error->ring[i].pid != -1) {
357 err_printf(m, "Active process (on ring %s): %s [%d]\n",
358 ring_str(i),
359 error->ring[i].comm,
360 error->ring[i].pid);
361 }
362 }
363 err_printf(m, "Reset count: %u\n", error->reset_count);
364 err_printf(m, "Suspend count: %u\n", error->suspend_count);
365 err_printf(m, "PCI ID: 0x%04x\n", dev->pdev->device);
366 err_printf(m, "EIR: 0x%08x\n", error->eir);
367 err_printf(m, "IER: 0x%08x\n", error->ier);
368 if (INTEL_INFO(dev)->gen >= 8) {
369 for (i = 0; i < 4; i++)
370 err_printf(m, "GTIER gt %d: 0x%08x\n", i,
371 error->gtier[i]);
372 } else if (HAS_PCH_SPLIT(dev) || IS_VALLEYVIEW(dev))
373 err_printf(m, "GTIER: 0x%08x\n", error->gtier[0]);
374 err_printf(m, "PGTBL_ER: 0x%08x\n", error->pgtbl_er);
375 err_printf(m, "FORCEWAKE: 0x%08x\n", error->forcewake);
376 err_printf(m, "DERRMR: 0x%08x\n", error->derrmr);
377 err_printf(m, "CCID: 0x%08x\n", error->ccid);
378 err_printf(m, "Missed interrupts: 0x%08lx\n", dev_priv->gpu_error.missed_irq_rings);
379
380 for (i = 0; i < dev_priv->num_fence_regs; i++)
381 err_printf(m, " fence[%d] = %08llx\n", i, error->fence[i]);
382
383 for (i = 0; i < ARRAY_SIZE(error->extra_instdone); i++)
384 err_printf(m, " INSTDONE_%d: 0x%08x\n", i,
385 error->extra_instdone[i]);
386
387 if (INTEL_INFO(dev)->gen >= 6) {
388 err_printf(m, "ERROR: 0x%08x\n", error->error);
389 err_printf(m, "DONE_REG: 0x%08x\n", error->done_reg);
390 }
391
392 if (INTEL_INFO(dev)->gen == 7)
393 err_printf(m, "ERR_INT: 0x%08x\n", error->err_int);
394
395 for (i = 0; i < ARRAY_SIZE(error->ring); i++)
396 i915_ring_error_state(m, dev, error, i);
397
398 for (i = 0; i < error->vm_count; i++) {
399 err_printf(m, "vm[%d]\n", i);
400
401 print_error_buffers(m, "Active",
402 error->active_bo[i],
403 error->active_bo_count[i]);
404
405 print_error_buffers(m, "Pinned",
406 error->pinned_bo[i],
407 error->pinned_bo_count[i]);
408 }
409
410 for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
411 obj = error->ring[i].batchbuffer;
412 if (obj) {
413 err_puts(m, dev_priv->ring[i].name);
414 if (error->ring[i].pid != -1)
415 err_printf(m, " (submitted by %s [%d])",
416 error->ring[i].comm,
417 error->ring[i].pid);
418 err_printf(m, " --- gtt_offset = 0x%08x\n",
419 obj->gtt_offset);
420 print_error_obj(m, obj);
421 }
422
423 obj = error->ring[i].wa_batchbuffer;
424 if (obj) {
425 err_printf(m, "%s (w/a) --- gtt_offset = 0x%08x\n",
426 dev_priv->ring[i].name, obj->gtt_offset);
427 print_error_obj(m, obj);
428 }
429
430 if (error->ring[i].num_requests) {
431 err_printf(m, "%s --- %d requests\n",
432 dev_priv->ring[i].name,
433 error->ring[i].num_requests);
434 for (j = 0; j < error->ring[i].num_requests; j++) {
435 err_printf(m, " seqno 0x%08x, emitted %ld, tail 0x%08x\n",
436 error->ring[i].requests[j].seqno,
437 error->ring[i].requests[j].jiffies,
438 error->ring[i].requests[j].tail);
439 }
440 }
441
442 if ((obj = error->ring[i].ringbuffer)) {
443 err_printf(m, "%s --- ringbuffer = 0x%08x\n",
444 dev_priv->ring[i].name,
445 obj->gtt_offset);
446 print_error_obj(m, obj);
447 }
448
449 if ((obj = error->ring[i].hws_page)) {
450 err_printf(m, "%s --- HW Status = 0x%08x\n",
451 dev_priv->ring[i].name,
452 obj->gtt_offset);
453 offset = 0;
454 for (elt = 0; elt < PAGE_SIZE/16; elt += 4) {
455 err_printf(m, "[%04x] %08x %08x %08x %08x\n",
456 offset,
457 obj->pages[0][elt],
458 obj->pages[0][elt+1],
459 obj->pages[0][elt+2],
460 obj->pages[0][elt+3]);
461 offset += 16;
462 }
463 }
464
465 if ((obj = error->ring[i].ctx)) {
466 err_printf(m, "%s --- HW Context = 0x%08x\n",
467 dev_priv->ring[i].name,
468 obj->gtt_offset);
469 print_error_obj(m, obj);
470 }
471 }
472
473 if ((obj = error->semaphore_obj)) {
474 err_printf(m, "Semaphore page = 0x%08x\n", obj->gtt_offset);
475 for (elt = 0; elt < PAGE_SIZE/16; elt += 4) {
476 err_printf(m, "[%04x] %08x %08x %08x %08x\n",
477 elt * 4,
478 obj->pages[0][elt],
479 obj->pages[0][elt+1],
480 obj->pages[0][elt+2],
481 obj->pages[0][elt+3]);
482 }
483 }
484
485 if (error->overlay)
486 intel_overlay_print_error_state(m, error->overlay);
487
488 if (error->display)
489 intel_display_print_error_state(m, dev, error->display);
490
491 out:
492 if (m->bytes == 0 && m->err)
493 return m->err;
494
495 return 0;
496 }
497
498 int i915_error_state_buf_init(struct drm_i915_error_state_buf *ebuf,
499 struct drm_i915_private *i915,
500 size_t count, loff_t pos)
501 {
502 memset(ebuf, 0, sizeof(*ebuf));
503 ebuf->i915 = i915;
504
505 /* We need to have enough room to store any i915_error_state printf
506 * so that we can move it to start position.
507 */
508 ebuf->size = count + 1 > PAGE_SIZE ? count + 1 : PAGE_SIZE;
509 ebuf->buf = kmalloc(ebuf->size,
510 GFP_TEMPORARY | __GFP_NORETRY | __GFP_NOWARN);
511
512 if (ebuf->buf == NULL) {
513 ebuf->size = PAGE_SIZE;
514 ebuf->buf = kmalloc(ebuf->size, GFP_TEMPORARY);
515 }
516
517 if (ebuf->buf == NULL) {
518 ebuf->size = 128;
519 ebuf->buf = kmalloc(ebuf->size, GFP_TEMPORARY);
520 }
521
522 if (ebuf->buf == NULL)
523 return -ENOMEM;
524
525 ebuf->start = pos;
526
527 return 0;
528 }
529
530 static void i915_error_object_free(struct drm_i915_error_object *obj)
531 {
532 int page;
533
534 if (obj == NULL)
535 return;
536
537 for (page = 0; page < obj->page_count; page++)
538 kfree(obj->pages[page]);
539
540 kfree(obj);
541 }
542
543 static void i915_error_state_free(struct kref *error_ref)
544 {
545 struct drm_i915_error_state *error = container_of(error_ref,
546 typeof(*error), ref);
547 int i;
548
549 for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
550 i915_error_object_free(error->ring[i].batchbuffer);
551 i915_error_object_free(error->ring[i].ringbuffer);
552 i915_error_object_free(error->ring[i].hws_page);
553 i915_error_object_free(error->ring[i].ctx);
554 kfree(error->ring[i].requests);
555 }
556
557 i915_error_object_free(error->semaphore_obj);
558 kfree(error->active_bo);
559 kfree(error->overlay);
560 kfree(error->display);
561 kfree(error);
562 }
563
564 static struct drm_i915_error_object *
565 i915_error_object_create(struct drm_i915_private *dev_priv,
566 struct drm_i915_gem_object *src,
567 struct i915_address_space *vm)
568 {
569 struct drm_i915_error_object *dst;
570 struct i915_vma *vma = NULL;
571 int num_pages;
572 bool use_ggtt;
573 int i = 0;
574 u32 reloc_offset;
575
576 if (src == NULL || src->pages == NULL)
577 return NULL;
578
579 num_pages = src->base.size >> PAGE_SHIFT;
580
581 dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *), GFP_ATOMIC);
582 if (dst == NULL)
583 return NULL;
584
585 if (i915_gem_obj_bound(src, vm))
586 dst->gtt_offset = i915_gem_obj_offset(src, vm);
587 else
588 dst->gtt_offset = -1;
589
590 reloc_offset = dst->gtt_offset;
591 if (i915_is_ggtt(vm))
592 vma = i915_gem_obj_to_ggtt(src);
593 use_ggtt = (src->cache_level == I915_CACHE_NONE &&
594 vma && (vma->bound & GLOBAL_BIND) &&
595 reloc_offset + num_pages * PAGE_SIZE <= dev_priv->gtt.mappable_end);
596
597 /* Cannot access stolen address directly, try to use the aperture */
598 if (src->stolen) {
599 use_ggtt = true;
600
601 if (!(vma && vma->bound & GLOBAL_BIND))
602 goto unwind;
603
604 reloc_offset = i915_gem_obj_ggtt_offset(src);
605 if (reloc_offset + num_pages * PAGE_SIZE > dev_priv->gtt.mappable_end)
606 goto unwind;
607 }
608
609 /* Cannot access snooped pages through the aperture */
610 if (use_ggtt && src->cache_level != I915_CACHE_NONE && !HAS_LLC(dev_priv->dev))
611 goto unwind;
612
613 dst->page_count = num_pages;
614 while (num_pages--) {
615 unsigned long flags;
616 void *d;
617
618 d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
619 if (d == NULL)
620 goto unwind;
621
622 local_irq_save(flags);
623 if (use_ggtt) {
624 void __iomem *s;
625
626 /* Simply ignore tiling or any overlapping fence.
627 * It's part of the error state, and this hopefully
628 * captures what the GPU read.
629 */
630
631 s = io_mapping_map_atomic_wc(dev_priv->gtt.mappable,
632 reloc_offset);
633 memcpy_fromio(d, s, PAGE_SIZE);
634 io_mapping_unmap_atomic(s);
635 } else {
636 struct page *page;
637 void *s;
638
639 page = i915_gem_object_get_page(src, i);
640
641 drm_clflush_pages(&page, 1);
642
643 s = kmap_atomic(page);
644 memcpy(d, s, PAGE_SIZE);
645 kunmap_atomic(s);
646
647 drm_clflush_pages(&page, 1);
648 }
649 local_irq_restore(flags);
650
651 dst->pages[i++] = d;
652 reloc_offset += PAGE_SIZE;
653 }
654
655 return dst;
656
657 unwind:
658 while (i--)
659 kfree(dst->pages[i]);
660 kfree(dst);
661 return NULL;
662 }
663 #define i915_error_ggtt_object_create(dev_priv, src) \
664 i915_error_object_create((dev_priv), (src), &(dev_priv)->gtt.base)
665
666 static void capture_bo(struct drm_i915_error_buffer *err,
667 struct i915_vma *vma)
668 {
669 struct drm_i915_gem_object *obj = vma->obj;
670
671 err->size = obj->base.size;
672 err->name = obj->base.name;
673 err->rseqno = i915_gem_request_get_seqno(obj->last_read_req);
674 err->wseqno = i915_gem_request_get_seqno(obj->last_write_req);
675 err->gtt_offset = vma->node.start;
676 err->read_domains = obj->base.read_domains;
677 err->write_domain = obj->base.write_domain;
678 err->fence_reg = obj->fence_reg;
679 err->pinned = 0;
680 if (i915_gem_obj_is_pinned(obj))
681 err->pinned = 1;
682 err->tiling = obj->tiling_mode;
683 err->dirty = obj->dirty;
684 err->purgeable = obj->madv != I915_MADV_WILLNEED;
685 err->userptr = obj->userptr.mm != NULL;
686 err->ring = obj->last_read_req ?
687 i915_gem_request_get_ring(obj->last_read_req)->id : -1;
688 err->cache_level = obj->cache_level;
689 }
690
691 static u32 capture_active_bo(struct drm_i915_error_buffer *err,
692 int count, struct list_head *head)
693 {
694 struct i915_vma *vma;
695 int i = 0;
696
697 list_for_each_entry(vma, head, mm_list) {
698 capture_bo(err++, vma);
699 if (++i == count)
700 break;
701 }
702
703 return i;
704 }
705
706 static u32 capture_pinned_bo(struct drm_i915_error_buffer *err,
707 int count, struct list_head *head,
708 struct i915_address_space *vm)
709 {
710 struct drm_i915_gem_object *obj;
711 struct drm_i915_error_buffer * const first = err;
712 struct drm_i915_error_buffer * const last = err + count;
713
714 list_for_each_entry(obj, head, global_list) {
715 struct i915_vma *vma;
716
717 if (err == last)
718 break;
719
720 list_for_each_entry(vma, &obj->vma_list, vma_link)
721 if (vma->vm == vm && vma->pin_count > 0)
722 capture_bo(err++, vma);
723 }
724
725 return err - first;
726 }
727
728 /* Generate a semi-unique error code. The code is not meant to have meaning, The
729 * code's only purpose is to try to prevent false duplicated bug reports by
730 * grossly estimating a GPU error state.
731 *
732 * TODO Ideally, hashing the batchbuffer would be a very nice way to determine
733 * the hang if we could strip the GTT offset information from it.
734 *
735 * It's only a small step better than a random number in its current form.
736 */
737 static uint32_t i915_error_generate_code(struct drm_i915_private *dev_priv,
738 struct drm_i915_error_state *error,
739 int *ring_id)
740 {
741 uint32_t error_code = 0;
742 int i;
743
744 /* IPEHR would be an ideal way to detect errors, as it's the gross
745 * measure of "the command that hung." However, has some very common
746 * synchronization commands which almost always appear in the case
747 * strictly a client bug. Use instdone to differentiate those some.
748 */
749 for (i = 0; i < I915_NUM_RINGS; i++) {
750 if (error->ring[i].hangcheck_action == HANGCHECK_HUNG) {
751 if (ring_id)
752 *ring_id = i;
753
754 return error->ring[i].ipehr ^ error->ring[i].instdone;
755 }
756 }
757
758 return error_code;
759 }
760
761 static void i915_gem_record_fences(struct drm_device *dev,
762 struct drm_i915_error_state *error)
763 {
764 struct drm_i915_private *dev_priv = dev->dev_private;
765 int i;
766
767 if (IS_GEN3(dev) || IS_GEN2(dev)) {
768 for (i = 0; i < 8; i++)
769 error->fence[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
770 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
771 for (i = 0; i < 8; i++)
772 error->fence[i+8] = I915_READ(FENCE_REG_945_8 +
773 (i * 4));
774 } else if (IS_GEN5(dev) || IS_GEN4(dev))
775 for (i = 0; i < 16; i++)
776 error->fence[i] = I915_READ64(FENCE_REG_965_0 +
777 (i * 8));
778 else if (INTEL_INFO(dev)->gen >= 6)
779 for (i = 0; i < dev_priv->num_fence_regs; i++)
780 error->fence[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 +
781 (i * 8));
782 }
783
784
785 static void gen8_record_semaphore_state(struct drm_i915_private *dev_priv,
786 struct drm_i915_error_state *error,
787 struct intel_engine_cs *ring,
788 struct drm_i915_error_ring *ering)
789 {
790 struct intel_engine_cs *to;
791 int i;
792
793 if (!i915_semaphore_is_enabled(dev_priv->dev))
794 return;
795
796 if (!error->semaphore_obj)
797 error->semaphore_obj =
798 i915_error_ggtt_object_create(dev_priv,
799 dev_priv->semaphore_obj);
800
801 for_each_ring(to, dev_priv, i) {
802 int idx;
803 u16 signal_offset;
804 u32 *tmp;
805
806 if (ring == to)
807 continue;
808
809 signal_offset = (GEN8_SIGNAL_OFFSET(ring, i) & (PAGE_SIZE - 1))
810 / 4;
811 tmp = error->semaphore_obj->pages[0];
812 idx = intel_ring_sync_index(ring, to);
813
814 ering->semaphore_mboxes[idx] = tmp[signal_offset];
815 ering->semaphore_seqno[idx] = ring->semaphore.sync_seqno[idx];
816 }
817 }
818
819 static void gen6_record_semaphore_state(struct drm_i915_private *dev_priv,
820 struct intel_engine_cs *ring,
821 struct drm_i915_error_ring *ering)
822 {
823 ering->semaphore_mboxes[0] = I915_READ(RING_SYNC_0(ring->mmio_base));
824 ering->semaphore_mboxes[1] = I915_READ(RING_SYNC_1(ring->mmio_base));
825 ering->semaphore_seqno[0] = ring->semaphore.sync_seqno[0];
826 ering->semaphore_seqno[1] = ring->semaphore.sync_seqno[1];
827
828 if (HAS_VEBOX(dev_priv->dev)) {
829 ering->semaphore_mboxes[2] =
830 I915_READ(RING_SYNC_2(ring->mmio_base));
831 ering->semaphore_seqno[2] = ring->semaphore.sync_seqno[2];
832 }
833 }
834
835 static void i915_record_ring_state(struct drm_device *dev,
836 struct drm_i915_error_state *error,
837 struct intel_engine_cs *ring,
838 struct drm_i915_error_ring *ering)
839 {
840 struct drm_i915_private *dev_priv = dev->dev_private;
841
842 if (INTEL_INFO(dev)->gen >= 6) {
843 ering->rc_psmi = I915_READ(ring->mmio_base + 0x50);
844 ering->fault_reg = I915_READ(RING_FAULT_REG(ring));
845 if (INTEL_INFO(dev)->gen >= 8)
846 gen8_record_semaphore_state(dev_priv, error, ring, ering);
847 else
848 gen6_record_semaphore_state(dev_priv, ring, ering);
849 }
850
851 if (INTEL_INFO(dev)->gen >= 4) {
852 ering->faddr = I915_READ(RING_DMA_FADD(ring->mmio_base));
853 ering->ipeir = I915_READ(RING_IPEIR(ring->mmio_base));
854 ering->ipehr = I915_READ(RING_IPEHR(ring->mmio_base));
855 ering->instdone = I915_READ(RING_INSTDONE(ring->mmio_base));
856 ering->instps = I915_READ(RING_INSTPS(ring->mmio_base));
857 ering->bbaddr = I915_READ(RING_BBADDR(ring->mmio_base));
858 if (INTEL_INFO(dev)->gen >= 8) {
859 ering->faddr |= (u64) I915_READ(RING_DMA_FADD_UDW(ring->mmio_base)) << 32;
860 ering->bbaddr |= (u64) I915_READ(RING_BBADDR_UDW(ring->mmio_base)) << 32;
861 }
862 ering->bbstate = I915_READ(RING_BBSTATE(ring->mmio_base));
863 } else {
864 ering->faddr = I915_READ(DMA_FADD_I8XX);
865 ering->ipeir = I915_READ(IPEIR);
866 ering->ipehr = I915_READ(IPEHR);
867 ering->instdone = I915_READ(INSTDONE);
868 }
869
870 ering->waiting = waitqueue_active(&ring->irq_queue);
871 ering->instpm = I915_READ(RING_INSTPM(ring->mmio_base));
872 ering->seqno = ring->get_seqno(ring, false);
873 ering->acthd = intel_ring_get_active_head(ring);
874 ering->head = I915_READ_HEAD(ring);
875 ering->tail = I915_READ_TAIL(ring);
876 ering->ctl = I915_READ_CTL(ring);
877
878 if (I915_NEED_GFX_HWS(dev)) {
879 int mmio;
880
881 if (IS_GEN7(dev)) {
882 switch (ring->id) {
883 default:
884 case RCS:
885 mmio = RENDER_HWS_PGA_GEN7;
886 break;
887 case BCS:
888 mmio = BLT_HWS_PGA_GEN7;
889 break;
890 case VCS:
891 mmio = BSD_HWS_PGA_GEN7;
892 break;
893 case VECS:
894 mmio = VEBOX_HWS_PGA_GEN7;
895 break;
896 }
897 } else if (IS_GEN6(ring->dev)) {
898 mmio = RING_HWS_PGA_GEN6(ring->mmio_base);
899 } else {
900 /* XXX: gen8 returns to sanity */
901 mmio = RING_HWS_PGA(ring->mmio_base);
902 }
903
904 ering->hws = I915_READ(mmio);
905 }
906
907 ering->hangcheck_score = ring->hangcheck.score;
908 ering->hangcheck_action = ring->hangcheck.action;
909
910 if (USES_PPGTT(dev)) {
911 int i;
912
913 ering->vm_info.gfx_mode = I915_READ(RING_MODE_GEN7(ring));
914
915 if (IS_GEN6(dev))
916 ering->vm_info.pp_dir_base =
917 I915_READ(RING_PP_DIR_BASE_READ(ring));
918 else if (IS_GEN7(dev))
919 ering->vm_info.pp_dir_base =
920 I915_READ(RING_PP_DIR_BASE(ring));
921 else if (INTEL_INFO(dev)->gen >= 8)
922 for (i = 0; i < 4; i++) {
923 ering->vm_info.pdp[i] =
924 I915_READ(GEN8_RING_PDP_UDW(ring, i));
925 ering->vm_info.pdp[i] <<= 32;
926 ering->vm_info.pdp[i] |=
927 I915_READ(GEN8_RING_PDP_LDW(ring, i));
928 }
929 }
930 }
931
932
933 static void i915_gem_record_active_context(struct intel_engine_cs *ring,
934 struct drm_i915_error_state *error,
935 struct drm_i915_error_ring *ering)
936 {
937 struct drm_i915_private *dev_priv = ring->dev->dev_private;
938 struct drm_i915_gem_object *obj;
939
940 /* Currently render ring is the only HW context user */
941 if (ring->id != RCS || !error->ccid)
942 return;
943
944 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
945 if (!i915_gem_obj_ggtt_bound(obj))
946 continue;
947
948 if ((error->ccid & PAGE_MASK) == i915_gem_obj_ggtt_offset(obj)) {
949 ering->ctx = i915_error_ggtt_object_create(dev_priv, obj);
950 break;
951 }
952 }
953 }
954
955 static void i915_gem_record_rings(struct drm_device *dev,
956 struct drm_i915_error_state *error)
957 {
958 struct drm_i915_private *dev_priv = dev->dev_private;
959 struct drm_i915_gem_request *request;
960 int i, count;
961
962 for (i = 0; i < I915_NUM_RINGS; i++) {
963 struct intel_engine_cs *ring = &dev_priv->ring[i];
964 struct intel_ringbuffer *rbuf;
965
966 error->ring[i].pid = -1;
967
968 if (ring->dev == NULL)
969 continue;
970
971 error->ring[i].valid = true;
972
973 i915_record_ring_state(dev, error, ring, &error->ring[i]);
974
975 request = i915_gem_find_active_request(ring);
976 if (request) {
977 struct i915_address_space *vm;
978
979 vm = request->ctx && request->ctx->ppgtt ?
980 &request->ctx->ppgtt->base :
981 &dev_priv->gtt.base;
982
983 /* We need to copy these to an anonymous buffer
984 * as the simplest method to avoid being overwritten
985 * by userspace.
986 */
987 error->ring[i].batchbuffer =
988 i915_error_object_create(dev_priv,
989 request->batch_obj,
990 vm);
991
992 if (HAS_BROKEN_CS_TLB(dev_priv->dev))
993 error->ring[i].wa_batchbuffer =
994 i915_error_ggtt_object_create(dev_priv,
995 ring->scratch.obj);
996
997 if (request->file_priv) {
998 struct task_struct *task;
999
1000 rcu_read_lock();
1001 task = pid_task(request->file_priv->file->pid,
1002 PIDTYPE_PID);
1003 if (task) {
1004 strcpy(error->ring[i].comm, task->comm);
1005 error->ring[i].pid = task->pid;
1006 }
1007 rcu_read_unlock();
1008 }
1009 }
1010
1011 if (i915.enable_execlists) {
1012 /* TODO: This is only a small fix to keep basic error
1013 * capture working, but we need to add more information
1014 * for it to be useful (e.g. dump the context being
1015 * executed).
1016 */
1017 if (request)
1018 rbuf = request->ctx->engine[ring->id].ringbuf;
1019 else
1020 rbuf = ring->default_context->engine[ring->id].ringbuf;
1021 } else
1022 rbuf = ring->buffer;
1023
1024 error->ring[i].cpu_ring_head = rbuf->head;
1025 error->ring[i].cpu_ring_tail = rbuf->tail;
1026
1027 error->ring[i].ringbuffer =
1028 i915_error_ggtt_object_create(dev_priv, rbuf->obj);
1029
1030 error->ring[i].hws_page =
1031 i915_error_ggtt_object_create(dev_priv, ring->status_page.obj);
1032
1033 i915_gem_record_active_context(ring, error, &error->ring[i]);
1034
1035 count = 0;
1036 list_for_each_entry(request, &ring->request_list, list)
1037 count++;
1038
1039 error->ring[i].num_requests = count;
1040 error->ring[i].requests =
1041 kcalloc(count, sizeof(*error->ring[i].requests),
1042 GFP_ATOMIC);
1043 if (error->ring[i].requests == NULL) {
1044 error->ring[i].num_requests = 0;
1045 continue;
1046 }
1047
1048 count = 0;
1049 list_for_each_entry(request, &ring->request_list, list) {
1050 struct drm_i915_error_request *erq;
1051
1052 erq = &error->ring[i].requests[count++];
1053 erq->seqno = request->seqno;
1054 erq->jiffies = request->emitted_jiffies;
1055 erq->tail = request->postfix;
1056 }
1057 }
1058 }
1059
1060 /* FIXME: Since pin count/bound list is global, we duplicate what we capture per
1061 * VM.
1062 */
1063 static void i915_gem_capture_vm(struct drm_i915_private *dev_priv,
1064 struct drm_i915_error_state *error,
1065 struct i915_address_space *vm,
1066 const int ndx)
1067 {
1068 struct drm_i915_error_buffer *active_bo = NULL, *pinned_bo = NULL;
1069 struct drm_i915_gem_object *obj;
1070 struct i915_vma *vma;
1071 int i;
1072
1073 i = 0;
1074 list_for_each_entry(vma, &vm->active_list, mm_list)
1075 i++;
1076 error->active_bo_count[ndx] = i;
1077
1078 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
1079 list_for_each_entry(vma, &obj->vma_list, vma_link)
1080 if (vma->vm == vm && vma->pin_count > 0)
1081 i++;
1082 }
1083 error->pinned_bo_count[ndx] = i - error->active_bo_count[ndx];
1084
1085 if (i) {
1086 active_bo = kcalloc(i, sizeof(*active_bo), GFP_ATOMIC);
1087 if (active_bo)
1088 pinned_bo = active_bo + error->active_bo_count[ndx];
1089 }
1090
1091 if (active_bo)
1092 error->active_bo_count[ndx] =
1093 capture_active_bo(active_bo,
1094 error->active_bo_count[ndx],
1095 &vm->active_list);
1096
1097 if (pinned_bo)
1098 error->pinned_bo_count[ndx] =
1099 capture_pinned_bo(pinned_bo,
1100 error->pinned_bo_count[ndx],
1101 &dev_priv->mm.bound_list, vm);
1102 error->active_bo[ndx] = active_bo;
1103 error->pinned_bo[ndx] = pinned_bo;
1104 }
1105
1106 static void i915_gem_capture_buffers(struct drm_i915_private *dev_priv,
1107 struct drm_i915_error_state *error)
1108 {
1109 struct i915_address_space *vm;
1110 int cnt = 0, i = 0;
1111
1112 list_for_each_entry(vm, &dev_priv->vm_list, global_link)
1113 cnt++;
1114
1115 error->active_bo = kcalloc(cnt, sizeof(*error->active_bo), GFP_ATOMIC);
1116 error->pinned_bo = kcalloc(cnt, sizeof(*error->pinned_bo), GFP_ATOMIC);
1117 error->active_bo_count = kcalloc(cnt, sizeof(*error->active_bo_count),
1118 GFP_ATOMIC);
1119 error->pinned_bo_count = kcalloc(cnt, sizeof(*error->pinned_bo_count),
1120 GFP_ATOMIC);
1121
1122 if (error->active_bo == NULL ||
1123 error->pinned_bo == NULL ||
1124 error->active_bo_count == NULL ||
1125 error->pinned_bo_count == NULL) {
1126 kfree(error->active_bo);
1127 kfree(error->active_bo_count);
1128 kfree(error->pinned_bo);
1129 kfree(error->pinned_bo_count);
1130
1131 error->active_bo = NULL;
1132 error->active_bo_count = NULL;
1133 error->pinned_bo = NULL;
1134 error->pinned_bo_count = NULL;
1135 } else {
1136 list_for_each_entry(vm, &dev_priv->vm_list, global_link)
1137 i915_gem_capture_vm(dev_priv, error, vm, i++);
1138
1139 error->vm_count = cnt;
1140 }
1141 }
1142
1143 /* Capture all registers which don't fit into another category. */
1144 static void i915_capture_reg_state(struct drm_i915_private *dev_priv,
1145 struct drm_i915_error_state *error)
1146 {
1147 struct drm_device *dev = dev_priv->dev;
1148 int i;
1149
1150 /* General organization
1151 * 1. Registers specific to a single generation
1152 * 2. Registers which belong to multiple generations
1153 * 3. Feature specific registers.
1154 * 4. Everything else
1155 * Please try to follow the order.
1156 */
1157
1158 /* 1: Registers specific to a single generation */
1159 if (IS_VALLEYVIEW(dev)) {
1160 error->gtier[0] = I915_READ(GTIER);
1161 error->ier = I915_READ(VLV_IER);
1162 error->forcewake = I915_READ(FORCEWAKE_VLV);
1163 }
1164
1165 if (IS_GEN7(dev))
1166 error->err_int = I915_READ(GEN7_ERR_INT);
1167
1168 if (IS_GEN6(dev)) {
1169 error->forcewake = I915_READ(FORCEWAKE);
1170 error->gab_ctl = I915_READ(GAB_CTL);
1171 error->gfx_mode = I915_READ(GFX_MODE);
1172 }
1173
1174 /* 2: Registers which belong to multiple generations */
1175 if (INTEL_INFO(dev)->gen >= 7)
1176 error->forcewake = I915_READ(FORCEWAKE_MT);
1177
1178 if (INTEL_INFO(dev)->gen >= 6) {
1179 error->derrmr = I915_READ(DERRMR);
1180 error->error = I915_READ(ERROR_GEN6);
1181 error->done_reg = I915_READ(DONE_REG);
1182 }
1183
1184 /* 3: Feature specific registers */
1185 if (IS_GEN6(dev) || IS_GEN7(dev)) {
1186 error->gam_ecochk = I915_READ(GAM_ECOCHK);
1187 error->gac_eco = I915_READ(GAC_ECO_BITS);
1188 }
1189
1190 /* 4: Everything else */
1191 if (HAS_HW_CONTEXTS(dev))
1192 error->ccid = I915_READ(CCID);
1193
1194 if (INTEL_INFO(dev)->gen >= 8) {
1195 error->ier = I915_READ(GEN8_DE_MISC_IER);
1196 for (i = 0; i < 4; i++)
1197 error->gtier[i] = I915_READ(GEN8_GT_IER(i));
1198 } else if (HAS_PCH_SPLIT(dev)) {
1199 error->ier = I915_READ(DEIER);
1200 error->gtier[0] = I915_READ(GTIER);
1201 } else if (IS_GEN2(dev)) {
1202 error->ier = I915_READ16(IER);
1203 } else if (!IS_VALLEYVIEW(dev)) {
1204 error->ier = I915_READ(IER);
1205 }
1206 error->eir = I915_READ(EIR);
1207 error->pgtbl_er = I915_READ(PGTBL_ER);
1208
1209 i915_get_extra_instdone(dev, error->extra_instdone);
1210 }
1211
1212 static void i915_error_capture_msg(struct drm_device *dev,
1213 struct drm_i915_error_state *error,
1214 bool wedged,
1215 const char *error_msg)
1216 {
1217 struct drm_i915_private *dev_priv = dev->dev_private;
1218 u32 ecode;
1219 int ring_id = -1, len;
1220
1221 ecode = i915_error_generate_code(dev_priv, error, &ring_id);
1222
1223 len = scnprintf(error->error_msg, sizeof(error->error_msg),
1224 "GPU HANG: ecode %d:%d:0x%08x",
1225 INTEL_INFO(dev)->gen, ring_id, ecode);
1226
1227 if (ring_id != -1 && error->ring[ring_id].pid != -1)
1228 len += scnprintf(error->error_msg + len,
1229 sizeof(error->error_msg) - len,
1230 ", in %s [%d]",
1231 error->ring[ring_id].comm,
1232 error->ring[ring_id].pid);
1233
1234 scnprintf(error->error_msg + len, sizeof(error->error_msg) - len,
1235 ", reason: %s, action: %s",
1236 error_msg,
1237 wedged ? "reset" : "continue");
1238 }
1239
1240 static void i915_capture_gen_state(struct drm_i915_private *dev_priv,
1241 struct drm_i915_error_state *error)
1242 {
1243 error->reset_count = i915_reset_count(&dev_priv->gpu_error);
1244 error->suspend_count = dev_priv->suspend_count;
1245 }
1246
1247 /**
1248 * i915_capture_error_state - capture an error record for later analysis
1249 * @dev: drm device
1250 *
1251 * Should be called when an error is detected (either a hang or an error
1252 * interrupt) to capture error state from the time of the error. Fills
1253 * out a structure which becomes available in debugfs for user level tools
1254 * to pick up.
1255 */
1256 void i915_capture_error_state(struct drm_device *dev, bool wedged,
1257 const char *error_msg)
1258 {
1259 static bool warned;
1260 struct drm_i915_private *dev_priv = dev->dev_private;
1261 struct drm_i915_error_state *error;
1262 unsigned long flags;
1263
1264 /* Account for pipe specific data like PIPE*STAT */
1265 error = kzalloc(sizeof(*error), GFP_ATOMIC);
1266 if (!error) {
1267 DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
1268 return;
1269 }
1270
1271 kref_init(&error->ref);
1272
1273 i915_capture_gen_state(dev_priv, error);
1274 i915_capture_reg_state(dev_priv, error);
1275 i915_gem_capture_buffers(dev_priv, error);
1276 i915_gem_record_fences(dev, error);
1277 i915_gem_record_rings(dev, error);
1278
1279 do_gettimeofday(&error->time);
1280
1281 error->overlay = intel_overlay_capture_error_state(dev);
1282 error->display = intel_display_capture_error_state(dev);
1283
1284 i915_error_capture_msg(dev, error, wedged, error_msg);
1285 DRM_INFO("%s\n", error->error_msg);
1286
1287 spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
1288 if (dev_priv->gpu_error.first_error == NULL) {
1289 dev_priv->gpu_error.first_error = error;
1290 error = NULL;
1291 }
1292 spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
1293
1294 if (error) {
1295 i915_error_state_free(&error->ref);
1296 return;
1297 }
1298
1299 if (!warned) {
1300 DRM_INFO("GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.\n");
1301 DRM_INFO("Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel\n");
1302 DRM_INFO("drm/i915 developers can then reassign to the right component if it's not a kernel issue.\n");
1303 DRM_INFO("The gpu crash dump is required to analyze gpu hangs, so please always attach it.\n");
1304 DRM_INFO("GPU crash dump saved to /sys/class/drm/card%d/error\n", dev->primary->index);
1305 warned = true;
1306 }
1307 }
1308
1309 void i915_error_state_get(struct drm_device *dev,
1310 struct i915_error_state_file_priv *error_priv)
1311 {
1312 struct drm_i915_private *dev_priv = dev->dev_private;
1313
1314 spin_lock_irq(&dev_priv->gpu_error.lock);
1315 error_priv->error = dev_priv->gpu_error.first_error;
1316 if (error_priv->error)
1317 kref_get(&error_priv->error->ref);
1318 spin_unlock_irq(&dev_priv->gpu_error.lock);
1319
1320 }
1321
1322 void i915_error_state_put(struct i915_error_state_file_priv *error_priv)
1323 {
1324 if (error_priv->error)
1325 kref_put(&error_priv->error->ref, i915_error_state_free);
1326 }
1327
1328 void i915_destroy_error_state(struct drm_device *dev)
1329 {
1330 struct drm_i915_private *dev_priv = dev->dev_private;
1331 struct drm_i915_error_state *error;
1332
1333 spin_lock_irq(&dev_priv->gpu_error.lock);
1334 error = dev_priv->gpu_error.first_error;
1335 dev_priv->gpu_error.first_error = NULL;
1336 spin_unlock_irq(&dev_priv->gpu_error.lock);
1337
1338 if (error)
1339 kref_put(&error->ref, i915_error_state_free);
1340 }
1341
1342 const char *i915_cache_level_str(struct drm_i915_private *i915, int type)
1343 {
1344 switch (type) {
1345 case I915_CACHE_NONE: return " uncached";
1346 case I915_CACHE_LLC: return HAS_LLC(i915) ? " LLC" : " snooped";
1347 case I915_CACHE_L3_LLC: return " L3+LLC";
1348 case I915_CACHE_WT: return " WT";
1349 default: return "";
1350 }
1351 }
1352
1353 /* NB: please notice the memset */
1354 void i915_get_extra_instdone(struct drm_device *dev, uint32_t *instdone)
1355 {
1356 struct drm_i915_private *dev_priv = dev->dev_private;
1357 memset(instdone, 0, sizeof(*instdone) * I915_NUM_INSTDONE_REG);
1358
1359 if (IS_GEN2(dev) || IS_GEN3(dev))
1360 instdone[0] = I915_READ(INSTDONE);
1361 else if (IS_GEN4(dev) || IS_GEN5(dev) || IS_GEN6(dev)) {
1362 instdone[0] = I915_READ(INSTDONE_I965);
1363 instdone[1] = I915_READ(INSTDONE1);
1364 } else if (INTEL_INFO(dev)->gen >= 7) {
1365 instdone[0] = I915_READ(GEN7_INSTDONE_1);
1366 instdone[1] = I915_READ(GEN7_SC_INSTDONE);
1367 instdone[2] = I915_READ(GEN7_SAMPLER_INSTDONE);
1368 instdone[3] = I915_READ(GEN7_ROW_INSTDONE);
1369 }
1370 }
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