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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / gpu / drm / i915 / i915_gpu_error.c
blob990cf8f43efda908ecb1565cb5e8a786efe68306
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 default: return "";
46 }
47 }
48
49 static const char *pin_flag(int pinned)
50 {
51 if (pinned > 0)
52 return " P";
53 else if (pinned < 0)
54 return " p";
55 else
56 return "";
57 }
58
59 static const char *tiling_flag(int tiling)
60 {
61 switch (tiling) {
62 default:
63 case I915_TILING_NONE: return "";
64 case I915_TILING_X: return " X";
65 case I915_TILING_Y: return " Y";
66 }
67 }
68
69 static const char *dirty_flag(int dirty)
70 {
71 return dirty ? " dirty" : "";
72 }
73
74 static const char *purgeable_flag(int purgeable)
75 {
76 return purgeable ? " purgeable" : "";
77 }
78
79 static bool __i915_error_ok(struct drm_i915_error_state_buf *e)
80 {
81
82 if (!e->err && WARN(e->bytes > (e->size - 1), "overflow")) {
83 e->err = -ENOSPC;
84 return false;
85 }
86
87 if (e->bytes == e->size - 1 || e->err)
88 return false;
89
90 return true;
91 }
92
93 static bool __i915_error_seek(struct drm_i915_error_state_buf *e,
94 unsigned len)
95 {
96 if (e->pos + len <= e->start) {
97 e->pos += len;
98 return false;
99 }
100
101 /* First vsnprintf needs to fit in its entirety for memmove */
102 if (len >= e->size) {
103 e->err = -EIO;
104 return false;
105 }
106
107 return true;
108 }
109
110 static void __i915_error_advance(struct drm_i915_error_state_buf *e,
111 unsigned len)
112 {
113 /* If this is first printf in this window, adjust it so that
114 * start position matches start of the buffer
115 */
116
117 if (e->pos < e->start) {
118 const size_t off = e->start - e->pos;
119
120 /* Should not happen but be paranoid */
121 if (off > len || e->bytes) {
122 e->err = -EIO;
123 return;
124 }
125
126 memmove(e->buf, e->buf + off, len - off);
127 e->bytes = len - off;
128 e->pos = e->start;
129 return;
130 }
131
132 e->bytes += len;
133 e->pos += len;
134 }
135
136 static void i915_error_vprintf(struct drm_i915_error_state_buf *e,
137 const char *f, va_list args)
138 {
139 unsigned len;
140
141 if (!__i915_error_ok(e))
142 return;
143
144 /* Seek the first printf which is hits start position */
145 if (e->pos < e->start) {
146 va_list tmp;
147
148 va_copy(tmp, args);
149 len = vsnprintf(NULL, 0, f, tmp);
150 va_end(tmp);
151
152 if (!__i915_error_seek(e, len))
153 return;
154 }
155
156 len = vsnprintf(e->buf + e->bytes, e->size - e->bytes, f, args);
157 if (len >= e->size - e->bytes)
158 len = e->size - e->bytes - 1;
159
160 __i915_error_advance(e, len);
161 }
162
163 static void i915_error_puts(struct drm_i915_error_state_buf *e,
164 const char *str)
165 {
166 unsigned len;
167
168 if (!__i915_error_ok(e))
169 return;
170
171 len = strlen(str);
172
173 /* Seek the first printf which is hits start position */
174 if (e->pos < e->start) {
175 if (!__i915_error_seek(e, len))
176 return;
177 }
178
179 if (len >= e->size - e->bytes)
180 len = e->size - e->bytes - 1;
181 memcpy(e->buf + e->bytes, str, len);
182
183 __i915_error_advance(e, len);
184 }
185
186 #define err_printf(e, ...) i915_error_printf(e, __VA_ARGS__)
187 #define err_puts(e, s) i915_error_puts(e, s)
188
189 static void print_error_buffers(struct drm_i915_error_state_buf *m,
190 const char *name,
191 struct drm_i915_error_buffer *err,
192 int count)
193 {
194 err_printf(m, "%s [%d]:\n", name, count);
195
196 while (count--) {
197 err_printf(m, " %08x %8u %02x %02x %x %x",
198 err->gtt_offset,
199 err->size,
200 err->read_domains,
201 err->write_domain,
202 err->rseqno, err->wseqno);
203 err_puts(m, pin_flag(err->pinned));
204 err_puts(m, tiling_flag(err->tiling));
205 err_puts(m, dirty_flag(err->dirty));
206 err_puts(m, purgeable_flag(err->purgeable));
207 err_puts(m, err->ring != -1 ? " " : "");
208 err_puts(m, ring_str(err->ring));
209 err_puts(m, i915_cache_level_str(err->cache_level));
210
211 if (err->name)
212 err_printf(m, " (name: %d)", err->name);
213 if (err->fence_reg != I915_FENCE_REG_NONE)
214 err_printf(m, " (fence: %d)", err->fence_reg);
215
216 err_puts(m, "\n");
217 err++;
218 }
219 }
220
221 static const char *hangcheck_action_to_str(enum intel_ring_hangcheck_action a)
222 {
223 switch (a) {
224 case HANGCHECK_IDLE:
225 return "idle";
226 case HANGCHECK_WAIT:
227 return "wait";
228 case HANGCHECK_ACTIVE:
229 return "active";
230 case HANGCHECK_KICK:
231 return "kick";
232 case HANGCHECK_HUNG:
233 return "hung";
234 }
235
236 return "unknown";
237 }
238
239 static void i915_ring_error_state(struct drm_i915_error_state_buf *m,
240 struct drm_device *dev,
241 struct drm_i915_error_state *error,
242 unsigned ring)
243 {
244 BUG_ON(ring >= I915_NUM_RINGS); /* shut up confused gcc */
245 if (!error->ring[ring].valid)
246 return;
247
248 err_printf(m, "%s command stream:\n", ring_str(ring));
249 err_printf(m, " HEAD: 0x%08x\n", error->head[ring]);
250 err_printf(m, " TAIL: 0x%08x\n", error->tail[ring]);
251 err_printf(m, " CTL: 0x%08x\n", error->ctl[ring]);
252 err_printf(m, " ACTHD: 0x%08x\n", error->acthd[ring]);
253 err_printf(m, " IPEIR: 0x%08x\n", error->ipeir[ring]);
254 err_printf(m, " IPEHR: 0x%08x\n", error->ipehr[ring]);
255 err_printf(m, " INSTDONE: 0x%08x\n", error->instdone[ring]);
256 if (INTEL_INFO(dev)->gen >= 4) {
257 err_printf(m, " BBADDR: 0x%08llx\n", error->bbaddr[ring]);
258 err_printf(m, " BB_STATE: 0x%08x\n", error->bbstate[ring]);
259 err_printf(m, " INSTPS: 0x%08x\n", error->instps[ring]);
260 }
261 err_printf(m, " INSTPM: 0x%08x\n", error->instpm[ring]);
262 err_printf(m, " FADDR: 0x%08x\n", error->faddr[ring]);
263 if (INTEL_INFO(dev)->gen >= 6) {
264 err_printf(m, " RC PSMI: 0x%08x\n", error->rc_psmi[ring]);
265 err_printf(m, " FAULT_REG: 0x%08x\n", error->fault_reg[ring]);
266 err_printf(m, " SYNC_0: 0x%08x [last synced 0x%08x]\n",
267 error->semaphore_mboxes[ring][0],
268 error->semaphore_seqno[ring][0]);
269 err_printf(m, " SYNC_1: 0x%08x [last synced 0x%08x]\n",
270 error->semaphore_mboxes[ring][1],
271 error->semaphore_seqno[ring][1]);
272 if (HAS_VEBOX(dev)) {
273 err_printf(m, " SYNC_2: 0x%08x [last synced 0x%08x]\n",
274 error->semaphore_mboxes[ring][2],
275 error->semaphore_seqno[ring][2]);
276 }
277 }
278 err_printf(m, " seqno: 0x%08x\n", error->seqno[ring]);
279 err_printf(m, " waiting: %s\n", yesno(error->waiting[ring]));
280 err_printf(m, " ring->head: 0x%08x\n", error->cpu_ring_head[ring]);
281 err_printf(m, " ring->tail: 0x%08x\n", error->cpu_ring_tail[ring]);
282 err_printf(m, " hangcheck: %s [%d]\n",
283 hangcheck_action_to_str(error->hangcheck_action[ring]),
284 error->hangcheck_score[ring]);
285 }
286
287 void i915_error_printf(struct drm_i915_error_state_buf *e, const char *f, ...)
288 {
289 va_list args;
290
291 va_start(args, f);
292 i915_error_vprintf(e, f, args);
293 va_end(args);
294 }
295
296 int i915_error_state_to_str(struct drm_i915_error_state_buf *m,
297 const struct i915_error_state_file_priv *error_priv)
298 {
299 struct drm_device *dev = error_priv->dev;
300 drm_i915_private_t *dev_priv = dev->dev_private;
301 struct drm_i915_error_state *error = error_priv->error;
302 int i, j, page, offset, elt;
303
304 if (!error) {
305 err_printf(m, "no error state collected\n");
306 goto out;
307 }
308
309 err_printf(m, "Time: %ld s %ld us\n", error->time.tv_sec,
310 error->time.tv_usec);
311 err_printf(m, "Kernel: " UTS_RELEASE "\n");
312 err_printf(m, "PCI ID: 0x%04x\n", dev->pdev->device);
313 err_printf(m, "EIR: 0x%08x\n", error->eir);
314 err_printf(m, "IER: 0x%08x\n", error->ier);
315 err_printf(m, "PGTBL_ER: 0x%08x\n", error->pgtbl_er);
316 err_printf(m, "FORCEWAKE: 0x%08x\n", error->forcewake);
317 err_printf(m, "DERRMR: 0x%08x\n", error->derrmr);
318 err_printf(m, "CCID: 0x%08x\n", error->ccid);
319 err_printf(m, "Missed interrupts: 0x%08lx\n", dev_priv->gpu_error.missed_irq_rings);
320
321 for (i = 0; i < dev_priv->num_fence_regs; i++)
322 err_printf(m, " fence[%d] = %08llx\n", i, error->fence[i]);
323
324 for (i = 0; i < ARRAY_SIZE(error->extra_instdone); i++)
325 err_printf(m, " INSTDONE_%d: 0x%08x\n", i,
326 error->extra_instdone[i]);
327
328 if (INTEL_INFO(dev)->gen >= 6) {
329 err_printf(m, "ERROR: 0x%08x\n", error->error);
330 err_printf(m, "DONE_REG: 0x%08x\n", error->done_reg);
331 }
332
333 if (INTEL_INFO(dev)->gen == 7)
334 err_printf(m, "ERR_INT: 0x%08x\n", error->err_int);
335
336 for (i = 0; i < ARRAY_SIZE(error->ring); i++)
337 i915_ring_error_state(m, dev, error, i);
338
339 if (error->active_bo)
340 print_error_buffers(m, "Active",
341 error->active_bo[0],
342 error->active_bo_count[0]);
343
344 if (error->pinned_bo)
345 print_error_buffers(m, "Pinned",
346 error->pinned_bo[0],
347 error->pinned_bo_count[0]);
348
349 for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
350 struct drm_i915_error_object *obj;
351
352 if ((obj = error->ring[i].batchbuffer)) {
353 err_printf(m, "%s --- gtt_offset = 0x%08x\n",
354 dev_priv->ring[i].name,
355 obj->gtt_offset);
356 offset = 0;
357 for (page = 0; page < obj->page_count; page++) {
358 for (elt = 0; elt < PAGE_SIZE/4; elt++) {
359 err_printf(m, "%08x : %08x\n", offset,
360 obj->pages[page][elt]);
361 offset += 4;
362 }
363 }
364 }
365
366 if (error->ring[i].num_requests) {
367 err_printf(m, "%s --- %d requests\n",
368 dev_priv->ring[i].name,
369 error->ring[i].num_requests);
370 for (j = 0; j < error->ring[i].num_requests; j++) {
371 err_printf(m, " seqno 0x%08x, emitted %ld, tail 0x%08x\n",
372 error->ring[i].requests[j].seqno,
373 error->ring[i].requests[j].jiffies,
374 error->ring[i].requests[j].tail);
375 }
376 }
377
378 if ((obj = error->ring[i].ringbuffer)) {
379 err_printf(m, "%s --- ringbuffer = 0x%08x\n",
380 dev_priv->ring[i].name,
381 obj->gtt_offset);
382 offset = 0;
383 for (page = 0; page < obj->page_count; page++) {
384 for (elt = 0; elt < PAGE_SIZE/4; elt++) {
385 err_printf(m, "%08x : %08x\n",
386 offset,
387 obj->pages[page][elt]);
388 offset += 4;
389 }
390 }
391 }
392
393 if ((obj = error->ring[i].ctx)) {
394 err_printf(m, "%s --- HW Context = 0x%08x\n",
395 dev_priv->ring[i].name,
396 obj->gtt_offset);
397 offset = 0;
398 for (elt = 0; elt < PAGE_SIZE/16; elt += 4) {
399 err_printf(m, "[%04x] %08x %08x %08x %08x\n",
400 offset,
401 obj->pages[0][elt],
402 obj->pages[0][elt+1],
403 obj->pages[0][elt+2],
404 obj->pages[0][elt+3]);
405 offset += 16;
406 }
407 }
408 }
409
410 if (error->overlay)
411 intel_overlay_print_error_state(m, error->overlay);
412
413 if (error->display)
414 intel_display_print_error_state(m, dev, error->display);
415
416 out:
417 if (m->bytes == 0 && m->err)
418 return m->err;
419
420 return 0;
421 }
422
423 int i915_error_state_buf_init(struct drm_i915_error_state_buf *ebuf,
424 size_t count, loff_t pos)
425 {
426 memset(ebuf, 0, sizeof(*ebuf));
427
428 /* We need to have enough room to store any i915_error_state printf
429 * so that we can move it to start position.
430 */
431 ebuf->size = count + 1 > PAGE_SIZE ? count + 1 : PAGE_SIZE;
432 ebuf->buf = kmalloc(ebuf->size,
433 GFP_TEMPORARY | __GFP_NORETRY | __GFP_NOWARN);
434
435 if (ebuf->buf == NULL) {
436 ebuf->size = PAGE_SIZE;
437 ebuf->buf = kmalloc(ebuf->size, GFP_TEMPORARY);
438 }
439
440 if (ebuf->buf == NULL) {
441 ebuf->size = 128;
442 ebuf->buf = kmalloc(ebuf->size, GFP_TEMPORARY);
443 }
444
445 if (ebuf->buf == NULL)
446 return -ENOMEM;
447
448 ebuf->start = pos;
449
450 return 0;
451 }
452
453 static void i915_error_object_free(struct drm_i915_error_object *obj)
454 {
455 int page;
456
457 if (obj == NULL)
458 return;
459
460 for (page = 0; page < obj->page_count; page++)
461 kfree(obj->pages[page]);
462
463 kfree(obj);
464 }
465
466 static void i915_error_state_free(struct kref *error_ref)
467 {
468 struct drm_i915_error_state *error = container_of(error_ref,
469 typeof(*error), ref);
470 int i;
471
472 for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
473 i915_error_object_free(error->ring[i].batchbuffer);
474 i915_error_object_free(error->ring[i].ringbuffer);
475 i915_error_object_free(error->ring[i].ctx);
476 kfree(error->ring[i].requests);
477 }
478
479 kfree(error->active_bo);
480 kfree(error->overlay);
481 kfree(error->display);
482 kfree(error);
483 }
484
485 static struct drm_i915_error_object *
486 i915_error_object_create_sized(struct drm_i915_private *dev_priv,
487 struct drm_i915_gem_object *src,
488 const int num_pages)
489 {
490 struct drm_i915_error_object *dst;
491 int i;
492 u32 reloc_offset;
493
494 if (src == NULL || src->pages == NULL)
495 return NULL;
496
497 dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *), GFP_ATOMIC);
498 if (dst == NULL)
499 return NULL;
500
501 reloc_offset = dst->gtt_offset = i915_gem_obj_ggtt_offset(src);
502 for (i = 0; i < num_pages; i++) {
503 unsigned long flags;
504 void *d;
505
506 d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
507 if (d == NULL)
508 goto unwind;
509
510 local_irq_save(flags);
511 if (reloc_offset < dev_priv->gtt.mappable_end &&
512 src->has_global_gtt_mapping) {
513 void __iomem *s;
514
515 /* Simply ignore tiling or any overlapping fence.
516 * It's part of the error state, and this hopefully
517 * captures what the GPU read.
518 */
519
520 s = io_mapping_map_atomic_wc(dev_priv->gtt.mappable,
521 reloc_offset);
522 memcpy_fromio(d, s, PAGE_SIZE);
523 io_mapping_unmap_atomic(s);
524 } else if (src->stolen) {
525 unsigned long offset;
526
527 offset = dev_priv->mm.stolen_base;
528 offset += src->stolen->start;
529 offset += i << PAGE_SHIFT;
530
531 memcpy_fromio(d, (void __iomem *) offset, PAGE_SIZE);
532 } else {
533 struct page *page;
534 void *s;
535
536 page = i915_gem_object_get_page(src, i);
537
538 drm_clflush_pages(&page, 1);
539
540 s = kmap_atomic(page);
541 memcpy(d, s, PAGE_SIZE);
542 kunmap_atomic(s);
543
544 drm_clflush_pages(&page, 1);
545 }
546 local_irq_restore(flags);
547
548 dst->pages[i] = d;
549
550 reloc_offset += PAGE_SIZE;
551 }
552 dst->page_count = num_pages;
553
554 return dst;
555
556 unwind:
557 while (i--)
558 kfree(dst->pages[i]);
559 kfree(dst);
560 return NULL;
561 }
562 #define i915_error_object_create(dev_priv, src) \
563 i915_error_object_create_sized((dev_priv), (src), \
564 (src)->base.size>>PAGE_SHIFT)
565
566 static void capture_bo(struct drm_i915_error_buffer *err,
567 struct drm_i915_gem_object *obj)
568 {
569 err->size = obj->base.size;
570 err->name = obj->base.name;
571 err->rseqno = obj->last_read_seqno;
572 err->wseqno = obj->last_write_seqno;
573 err->gtt_offset = i915_gem_obj_ggtt_offset(obj);
574 err->read_domains = obj->base.read_domains;
575 err->write_domain = obj->base.write_domain;
576 err->fence_reg = obj->fence_reg;
577 err->pinned = 0;
578 if (obj->pin_count > 0)
579 err->pinned = 1;
580 if (obj->user_pin_count > 0)
581 err->pinned = -1;
582 err->tiling = obj->tiling_mode;
583 err->dirty = obj->dirty;
584 err->purgeable = obj->madv != I915_MADV_WILLNEED;
585 err->ring = obj->ring ? obj->ring->id : -1;
586 err->cache_level = obj->cache_level;
587 }
588
589 static u32 capture_active_bo(struct drm_i915_error_buffer *err,
590 int count, struct list_head *head)
591 {
592 struct i915_vma *vma;
593 int i = 0;
594
595 list_for_each_entry(vma, head, mm_list) {
596 capture_bo(err++, vma->obj);
597 if (++i == count)
598 break;
599 }
600
601 return i;
602 }
603
604 static u32 capture_pinned_bo(struct drm_i915_error_buffer *err,
605 int count, struct list_head *head)
606 {
607 struct drm_i915_gem_object *obj;
608 int i = 0;
609
610 list_for_each_entry(obj, head, global_list) {
611 if (obj->pin_count == 0)
612 continue;
613
614 capture_bo(err++, obj);
615 if (++i == count)
616 break;
617 }
618
619 return i;
620 }
621
622 static void i915_gem_record_fences(struct drm_device *dev,
623 struct drm_i915_error_state *error)
624 {
625 struct drm_i915_private *dev_priv = dev->dev_private;
626 int i;
627
628 /* Fences */
629 switch (INTEL_INFO(dev)->gen) {
630 case 8:
631 case 7:
632 case 6:
633 for (i = 0; i < dev_priv->num_fence_regs; i++)
634 error->fence[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8));
635 break;
636 case 5:
637 case 4:
638 for (i = 0; i < 16; i++)
639 error->fence[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
640 break;
641 case 3:
642 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
643 for (i = 0; i < 8; i++)
644 error->fence[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
645 case 2:
646 for (i = 0; i < 8; i++)
647 error->fence[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
648 break;
649
650 default:
651 BUG();
652 }
653 }
654
655 static struct drm_i915_error_object *
656 i915_error_first_batchbuffer(struct drm_i915_private *dev_priv,
657 struct intel_ring_buffer *ring)
658 {
659 struct i915_address_space *vm;
660 struct i915_vma *vma;
661 struct drm_i915_gem_object *obj;
662 u32 seqno;
663
664 if (!ring->get_seqno)
665 return NULL;
666
667 if (HAS_BROKEN_CS_TLB(dev_priv->dev)) {
668 u32 acthd = I915_READ(ACTHD);
669
670 if (WARN_ON(ring->id != RCS))
671 return NULL;
672
673 obj = ring->scratch.obj;
674 if (obj != NULL &&
675 acthd >= i915_gem_obj_ggtt_offset(obj) &&
676 acthd < i915_gem_obj_ggtt_offset(obj) + obj->base.size)
677 return i915_error_object_create(dev_priv, obj);
678 }
679
680 seqno = ring->get_seqno(ring, false);
681 list_for_each_entry(vm, &dev_priv->vm_list, global_link) {
682 list_for_each_entry(vma, &vm->active_list, mm_list) {
683 obj = vma->obj;
684 if (obj->ring != ring)
685 continue;
686
687 if (i915_seqno_passed(seqno, obj->last_read_seqno))
688 continue;
689
690 if ((obj->base.read_domains & I915_GEM_DOMAIN_COMMAND) == 0)
691 continue;
692
693 /* We need to copy these to an anonymous buffer as the simplest
694 * method to avoid being overwritten by userspace.
695 */
696 return i915_error_object_create(dev_priv, obj);
697 }
698 }
699
700 return NULL;
701 }
702
703 static void i915_record_ring_state(struct drm_device *dev,
704 struct drm_i915_error_state *error,
705 struct intel_ring_buffer *ring)
706 {
707 struct drm_i915_private *dev_priv = dev->dev_private;
708
709 if (INTEL_INFO(dev)->gen >= 6) {
710 error->rc_psmi[ring->id] = I915_READ(ring->mmio_base + 0x50);
711 error->fault_reg[ring->id] = I915_READ(RING_FAULT_REG(ring));
712 error->semaphore_mboxes[ring->id][0]
713 = I915_READ(RING_SYNC_0(ring->mmio_base));
714 error->semaphore_mboxes[ring->id][1]
715 = I915_READ(RING_SYNC_1(ring->mmio_base));
716 error->semaphore_seqno[ring->id][0] = ring->sync_seqno[0];
717 error->semaphore_seqno[ring->id][1] = ring->sync_seqno[1];
718 }
719
720 if (HAS_VEBOX(dev)) {
721 error->semaphore_mboxes[ring->id][2] =
722 I915_READ(RING_SYNC_2(ring->mmio_base));
723 error->semaphore_seqno[ring->id][2] = ring->sync_seqno[2];
724 }
725
726 if (INTEL_INFO(dev)->gen >= 4) {
727 error->faddr[ring->id] = I915_READ(RING_DMA_FADD(ring->mmio_base));
728 error->ipeir[ring->id] = I915_READ(RING_IPEIR(ring->mmio_base));
729 error->ipehr[ring->id] = I915_READ(RING_IPEHR(ring->mmio_base));
730 error->instdone[ring->id] = I915_READ(RING_INSTDONE(ring->mmio_base));
731 error->instps[ring->id] = I915_READ(RING_INSTPS(ring->mmio_base));
732 error->bbaddr[ring->id] = I915_READ(RING_BBADDR(ring->mmio_base));
733 if (INTEL_INFO(dev)->gen >= 8)
734 error->bbaddr[ring->id] |= (u64) I915_READ(RING_BBADDR_UDW(ring->mmio_base)) << 32;
735 error->bbstate[ring->id] = I915_READ(RING_BBSTATE(ring->mmio_base));
736 } else {
737 error->faddr[ring->id] = I915_READ(DMA_FADD_I8XX);
738 error->ipeir[ring->id] = I915_READ(IPEIR);
739 error->ipehr[ring->id] = I915_READ(IPEHR);
740 error->instdone[ring->id] = I915_READ(INSTDONE);
741 }
742
743 error->waiting[ring->id] = waitqueue_active(&ring->irq_queue);
744 error->instpm[ring->id] = I915_READ(RING_INSTPM(ring->mmio_base));
745 error->seqno[ring->id] = ring->get_seqno(ring, false);
746 error->acthd[ring->id] = intel_ring_get_active_head(ring);
747 error->head[ring->id] = I915_READ_HEAD(ring);
748 error->tail[ring->id] = I915_READ_TAIL(ring);
749 error->ctl[ring->id] = I915_READ_CTL(ring);
750
751 error->cpu_ring_head[ring->id] = ring->head;
752 error->cpu_ring_tail[ring->id] = ring->tail;
753
754 error->hangcheck_score[ring->id] = ring->hangcheck.score;
755 error->hangcheck_action[ring->id] = ring->hangcheck.action;
756 }
757
758
759 static void i915_gem_record_active_context(struct intel_ring_buffer *ring,
760 struct drm_i915_error_state *error,
761 struct drm_i915_error_ring *ering)
762 {
763 struct drm_i915_private *dev_priv = ring->dev->dev_private;
764 struct drm_i915_gem_object *obj;
765
766 /* Currently render ring is the only HW context user */
767 if (ring->id != RCS || !error->ccid)
768 return;
769
770 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
771 if ((error->ccid & PAGE_MASK) == i915_gem_obj_ggtt_offset(obj)) {
772 ering->ctx = i915_error_object_create_sized(dev_priv,
773 obj, 1);
774 break;
775 }
776 }
777 }
778
779 static void i915_gem_record_rings(struct drm_device *dev,
780 struct drm_i915_error_state *error)
781 {
782 struct drm_i915_private *dev_priv = dev->dev_private;
783 struct drm_i915_gem_request *request;
784 int i, count;
785
786 for (i = 0; i < I915_NUM_RINGS; i++) {
787 struct intel_ring_buffer *ring = &dev_priv->ring[i];
788
789 if (ring->dev == NULL)
790 continue;
791
792 error->ring[i].valid = true;
793
794 i915_record_ring_state(dev, error, ring);
795
796 error->ring[i].batchbuffer =
797 i915_error_first_batchbuffer(dev_priv, ring);
798
799 error->ring[i].ringbuffer =
800 i915_error_object_create(dev_priv, ring->obj);
801
802
803 i915_gem_record_active_context(ring, error, &error->ring[i]);
804
805 count = 0;
806 list_for_each_entry(request, &ring->request_list, list)
807 count++;
808
809 error->ring[i].num_requests = count;
810 error->ring[i].requests =
811 kcalloc(count, sizeof(*error->ring[i].requests),
812 GFP_ATOMIC);
813 if (error->ring[i].requests == NULL) {
814 error->ring[i].num_requests = 0;
815 continue;
816 }
817
818 count = 0;
819 list_for_each_entry(request, &ring->request_list, list) {
820 struct drm_i915_error_request *erq;
821
822 erq = &error->ring[i].requests[count++];
823 erq->seqno = request->seqno;
824 erq->jiffies = request->emitted_jiffies;
825 erq->tail = request->tail;
826 }
827 }
828 }
829
830 /* FIXME: Since pin count/bound list is global, we duplicate what we capture per
831 * VM.
832 */
833 static void i915_gem_capture_vm(struct drm_i915_private *dev_priv,
834 struct drm_i915_error_state *error,
835 struct i915_address_space *vm,
836 const int ndx)
837 {
838 struct drm_i915_error_buffer *active_bo = NULL, *pinned_bo = NULL;
839 struct drm_i915_gem_object *obj;
840 struct i915_vma *vma;
841 int i;
842
843 i = 0;
844 list_for_each_entry(vma, &vm->active_list, mm_list)
845 i++;
846 error->active_bo_count[ndx] = i;
847 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list)
848 if (obj->pin_count)
849 i++;
850 error->pinned_bo_count[ndx] = i - error->active_bo_count[ndx];
851
852 if (i) {
853 active_bo = kcalloc(i, sizeof(*active_bo), GFP_ATOMIC);
854 if (active_bo)
855 pinned_bo = active_bo + error->active_bo_count[ndx];
856 }
857
858 if (active_bo)
859 error->active_bo_count[ndx] =
860 capture_active_bo(active_bo,
861 error->active_bo_count[ndx],
862 &vm->active_list);
863
864 if (pinned_bo)
865 error->pinned_bo_count[ndx] =
866 capture_pinned_bo(pinned_bo,
867 error->pinned_bo_count[ndx],
868 &dev_priv->mm.bound_list);
869 error->active_bo[ndx] = active_bo;
870 error->pinned_bo[ndx] = pinned_bo;
871 }
872
873 static void i915_gem_capture_buffers(struct drm_i915_private *dev_priv,
874 struct drm_i915_error_state *error)
875 {
876 struct i915_address_space *vm;
877 int cnt = 0, i = 0;
878
879 list_for_each_entry(vm, &dev_priv->vm_list, global_link)
880 cnt++;
881
882 if (WARN(cnt > 1, "Multiple VMs not yet supported\n"))
883 cnt = 1;
884
885 vm = &dev_priv->gtt.base;
886
887 error->active_bo = kcalloc(cnt, sizeof(*error->active_bo), GFP_ATOMIC);
888 error->pinned_bo = kcalloc(cnt, sizeof(*error->pinned_bo), GFP_ATOMIC);
889 error->active_bo_count = kcalloc(cnt, sizeof(*error->active_bo_count),
890 GFP_ATOMIC);
891 error->pinned_bo_count = kcalloc(cnt, sizeof(*error->pinned_bo_count),
892 GFP_ATOMIC);
893
894 list_for_each_entry(vm, &dev_priv->vm_list, global_link)
895 i915_gem_capture_vm(dev_priv, error, vm, i++);
896 }
897
898 /**
899 * i915_capture_error_state - capture an error record for later analysis
900 * @dev: drm device
901 *
902 * Should be called when an error is detected (either a hang or an error
903 * interrupt) to capture error state from the time of the error. Fills
904 * out a structure which becomes available in debugfs for user level tools
905 * to pick up.
906 */
907 void i915_capture_error_state(struct drm_device *dev)
908 {
909 struct drm_i915_private *dev_priv = dev->dev_private;
910 struct drm_i915_error_state *error;
911 unsigned long flags;
912 int pipe;
913
914 spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
915 error = dev_priv->gpu_error.first_error;
916 spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
917 if (error)
918 return;
919
920 /* Account for pipe specific data like PIPE*STAT */
921 error = kzalloc(sizeof(*error), GFP_ATOMIC);
922 if (!error) {
923 DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
924 return;
925 }
926
927 DRM_INFO("GPU crash dump saved to /sys/class/drm/card%d/error\n",
928 dev->primary->index);
929 DRM_INFO("GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.\n");
930 DRM_INFO("Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel\n");
931 DRM_INFO("drm/i915 developers can then reassign to the right component if it's not a kernel issue.\n");
932 DRM_INFO("The gpu crash dump is required to analyze gpu hangs, so please always attach it.\n");
933
934 kref_init(&error->ref);
935 error->eir = I915_READ(EIR);
936 error->pgtbl_er = I915_READ(PGTBL_ER);
937 if (HAS_HW_CONTEXTS(dev))
938 error->ccid = I915_READ(CCID);
939
940 if (HAS_PCH_SPLIT(dev))
941 error->ier = I915_READ(DEIER) | I915_READ(GTIER);
942 else if (IS_VALLEYVIEW(dev))
943 error->ier = I915_READ(GTIER) | I915_READ(VLV_IER);
944 else if (IS_GEN2(dev))
945 error->ier = I915_READ16(IER);
946 else
947 error->ier = I915_READ(IER);
948
949 if (INTEL_INFO(dev)->gen >= 6)
950 error->derrmr = I915_READ(DERRMR);
951
952 if (IS_VALLEYVIEW(dev))
953 error->forcewake = I915_READ(FORCEWAKE_VLV);
954 else if (INTEL_INFO(dev)->gen >= 7)
955 error->forcewake = I915_READ(FORCEWAKE_MT);
956 else if (INTEL_INFO(dev)->gen == 6)
957 error->forcewake = I915_READ(FORCEWAKE);
958
959 if (!HAS_PCH_SPLIT(dev))
960 for_each_pipe(pipe)
961 error->pipestat[pipe] = I915_READ(PIPESTAT(pipe));
962
963 if (INTEL_INFO(dev)->gen >= 6) {
964 error->error = I915_READ(ERROR_GEN6);
965 error->done_reg = I915_READ(DONE_REG);
966 }
967
968 if (INTEL_INFO(dev)->gen == 7)
969 error->err_int = I915_READ(GEN7_ERR_INT);
970
971 i915_get_extra_instdone(dev, error->extra_instdone);
972
973 i915_gem_capture_buffers(dev_priv, error);
974 i915_gem_record_fences(dev, error);
975 i915_gem_record_rings(dev, error);
976
977 do_gettimeofday(&error->time);
978
979 error->overlay = intel_overlay_capture_error_state(dev);
980 error->display = intel_display_capture_error_state(dev);
981
982 spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
983 if (dev_priv->gpu_error.first_error == NULL) {
984 dev_priv->gpu_error.first_error = error;
985 error = NULL;
986 }
987 spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
988
989 if (error)
990 i915_error_state_free(&error->ref);
991 }
992
993 void i915_error_state_get(struct drm_device *dev,
994 struct i915_error_state_file_priv *error_priv)
995 {
996 struct drm_i915_private *dev_priv = dev->dev_private;
997 unsigned long flags;
998
999 spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
1000 error_priv->error = dev_priv->gpu_error.first_error;
1001 if (error_priv->error)
1002 kref_get(&error_priv->error->ref);
1003 spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
1004
1005 }
1006
1007 void i915_error_state_put(struct i915_error_state_file_priv *error_priv)
1008 {
1009 if (error_priv->error)
1010 kref_put(&error_priv->error->ref, i915_error_state_free);
1011 }
1012
1013 void i915_destroy_error_state(struct drm_device *dev)
1014 {
1015 struct drm_i915_private *dev_priv = dev->dev_private;
1016 struct drm_i915_error_state *error;
1017 unsigned long flags;
1018
1019 spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
1020 error = dev_priv->gpu_error.first_error;
1021 dev_priv->gpu_error.first_error = NULL;
1022 spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
1023
1024 if (error)
1025 kref_put(&error->ref, i915_error_state_free);
1026 }
1027
1028 const char *i915_cache_level_str(int type)
1029 {
1030 switch (type) {
1031 case I915_CACHE_NONE: return " uncached";
1032 case I915_CACHE_LLC: return " snooped or LLC";
1033 case I915_CACHE_L3_LLC: return " L3+LLC";
1034 case I915_CACHE_WT: return " WT";
1035 default: return "";
1036 }
1037 }
1038
1039 /* NB: please notice the memset */
1040 void i915_get_extra_instdone(struct drm_device *dev, uint32_t *instdone)
1041 {
1042 struct drm_i915_private *dev_priv = dev->dev_private;
1043 memset(instdone, 0, sizeof(*instdone) * I915_NUM_INSTDONE_REG);
1044
1045 switch (INTEL_INFO(dev)->gen) {
1046 case 2:
1047 case 3:
1048 instdone[0] = I915_READ(INSTDONE);
1049 break;
1050 case 4:
1051 case 5:
1052 case 6:
1053 instdone[0] = I915_READ(INSTDONE_I965);
1054 instdone[1] = I915_READ(INSTDONE1);
1055 break;
1056 default:
1057 WARN_ONCE(1, "Unsupported platform\n");
1058 case 7:
1059 case 8:
1060 instdone[0] = I915_READ(GEN7_INSTDONE_1);
1061 instdone[1] = I915_READ(GEN7_SC_INSTDONE);
1062 instdone[2] = I915_READ(GEN7_SAMPLER_INSTDONE);
1063 instdone[3] = I915_READ(GEN7_ROW_INSTDONE);
1064 break;
1065 }
1066 }
Linux with added FPC-III support