aboutsummaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/i915/i915_debugfs.c
blob: 52510ad8b25d3e89f7f920af0a65978512b28209 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
/*
 * Copyright © 2008 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * Authors:
 *    Eric Anholt <eric@anholt.net>
 *    Keith Packard <keithp@keithp.com>
 *
 */

#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <linux/slab.h>
#include "drmP.h"
#include "drm.h"
#include "i915_drm.h"
#include "i915_drv.h"

#define DRM_I915_RING_DEBUG 1


#if defined(CONFIG_DEBUG_FS)

#define ACTIVE_LIST	1
#define FLUSHING_LIST	2
#define INACTIVE_LIST	3

static const char *get_pin_flag(struct drm_i915_gem_object *obj_priv)
{
	if (obj_priv->user_pin_count > 0)
		return "P";
	else if (obj_priv->pin_count > 0)
		return "p";
	else
		return " ";
}

static const char *get_tiling_flag(struct drm_i915_gem_object *obj_priv)
{
    switch (obj_priv->tiling_mode) {
    default:
    case I915_TILING_NONE: return " ";
    case I915_TILING_X: return "X";
    case I915_TILING_Y: return "Y";
    }
}

static int i915_gem_object_list_info(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	uintptr_t list = (uintptr_t) node->info_ent->data;
	struct list_head *head;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;
	struct drm_i915_gem_object *obj_priv;
	spinlock_t *lock = NULL;

	switch (list) {
	case ACTIVE_LIST:
		seq_printf(m, "Active:\n");
		lock = &dev_priv->mm.active_list_lock;
		head = &dev_priv->render_ring.active_list;
		break;
	case INACTIVE_LIST:
		seq_printf(m, "Inactive:\n");
		head = &dev_priv->mm.inactive_list;
		break;
	case FLUSHING_LIST:
		seq_printf(m, "Flushing:\n");
		head = &dev_priv->mm.flushing_list;
		break;
	default:
		DRM_INFO("Ooops, unexpected list\n");
		return 0;
	}

	if (lock)
		spin_lock(lock);
	list_for_each_entry(obj_priv, head, list)
	{
		seq_printf(m, "    %p: %s %8zd %08x %08x %d%s%s",
			   &obj_priv->base,
			   get_pin_flag(obj_priv),
			   obj_priv->base.size,
			   obj_priv->base.read_domains,
			   obj_priv->base.write_domain,
			   obj_priv->last_rendering_seqno,
			   obj_priv->dirty ? " dirty" : "",
			   obj_priv->madv == I915_MADV_DONTNEED ? " purgeable" : "");

		if (obj_priv->base.name)
			seq_printf(m, " (name: %d)", obj_priv->base.name);
		if (obj_priv->fence_reg != I915_FENCE_REG_NONE)
			seq_printf(m, " (fence: %d)", obj_priv->fence_reg);
		if (obj_priv->gtt_space != NULL)
			seq_printf(m, " (gtt_offset: %08x)", obj_priv->gtt_offset);

		seq_printf(m, "\n");
	}

	if (lock)
	    spin_unlock(lock);
	return 0;
}

static int i915_gem_request_info(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;
	struct drm_i915_gem_request *gem_request;

	seq_printf(m, "Request:\n");
	list_for_each_entry(gem_request, &dev_priv->render_ring.request_list,
			list) {
		seq_printf(m, "    %d @ %d\n",
			   gem_request->seqno,
			   (int) (jiffies - gem_request->emitted_jiffies));
	}
	return 0;
}

static int i915_gem_seqno_info(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;

	if (dev_priv->render_ring.status_page.page_addr != NULL) {
		seq_printf(m, "Current sequence: %d\n",
			   i915_get_gem_seqno(dev,  &dev_priv->render_ring));
	} else {
		seq_printf(m, "Current sequence: hws uninitialized\n");
	}
	seq_printf(m, "Waiter sequence:  %d\n",
			dev_priv->mm.waiting_gem_seqno);
	seq_printf(m, "IRQ sequence:     %d\n", dev_priv->mm.irq_gem_seqno);
	return 0;
}


static int i915_interrupt_info(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;

	if (!HAS_PCH_SPLIT(dev)) {
		seq_printf(m, "Interrupt enable:    %08x\n",
			   I915_READ(IER));
		seq_printf(m, "Interrupt identity:  %08x\n",
			   I915_READ(IIR));
		seq_printf(m, "Interrupt mask:      %08x\n",
			   I915_READ(IMR));
		seq_printf(m, "Pipe A stat:         %08x\n",
			   I915_READ(PIPEASTAT));
		seq_printf(m, "Pipe B stat:         %08x\n",
			   I915_READ(PIPEBSTAT));
	} else {
		seq_printf(m, "North Display Interrupt enable:		%08x\n",
			   I915_READ(DEIER));
		seq_printf(m, "North Display Interrupt identity:	%08x\n",
			   I915_READ(DEIIR));
		seq_printf(m, "North Display Interrupt mask:		%08x\n",
			   I915_READ(DEIMR));
		seq_printf(m, "South Display Interrupt enable:		%08x\n",
			   I915_READ(SDEIER));
		seq_printf(m, "South Display Interrupt identity:	%08x\n",
			   I915_READ(SDEIIR));
		seq_printf(m, "South Display Interrupt mask:		%08x\n",
			   I915_READ(SDEIMR));
		seq_printf(m, "Graphics Interrupt enable:		%08x\n",
			   I915_READ(GTIER));
		seq_printf(m, "Graphics Interrupt identity:		%08x\n",
			   I915_READ(GTIIR));
		seq_printf(m, "Graphics Interrupt mask:		%08x\n",
			   I915_READ(GTIMR));
	}
	seq_printf(m, "Interrupts received: %d\n",
		   atomic_read(&dev_priv->irq_received));
	if (dev_priv->render_ring.status_page.page_addr != NULL) {
		seq_printf(m, "Current sequence:    %d\n",
			   i915_get_gem_seqno(dev,  &dev_priv->render_ring));
	} else {
		seq_printf(m, "Current sequence:    hws uninitialized\n");
	}
	seq_printf(m, "Waiter sequence:     %d\n",
		   dev_priv->mm.waiting_gem_seqno);
	seq_printf(m, "IRQ sequence:        %d\n",
		   dev_priv->mm.irq_gem_seqno);
	return 0;
}

static int i915_gem_fence_regs_info(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;
	int i;

	seq_printf(m, "Reserved fences = %d\n", dev_priv->fence_reg_start);
	seq_printf(m, "Total fences = %d\n", dev_priv->num_fence_regs);
	for (i = 0; i < dev_priv->num_fence_regs; i++) {
		struct drm_gem_object *obj = dev_priv->fence_regs[i].obj;

		if (obj == NULL) {
			seq_printf(m, "Fenced object[%2d] = unused\n", i);
		} else {
			struct drm_i915_gem_object *obj_priv;

			obj_priv = to_intel_bo(obj);
			seq_printf(m, "Fenced object[%2d] = %p: %s "
				   "%08x %08zx %08x %s %08x %08x %d",
				   i, obj, get_pin_flag(obj_priv),
				   obj_priv->gtt_offset,
				   obj->size, obj_priv->stride,
				   get_tiling_flag(obj_priv),
				   obj->read_domains, obj->write_domain,
				   obj_priv->last_rendering_seqno);
			if (obj->name)
				seq_printf(m, " (name: %d)", obj->name);
			seq_printf(m, "\n");
		}
	}

	return 0;
}

static int i915_hws_info(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;
	int i;
	volatile u32 *hws;

	hws = (volatile u32 *)dev_priv->render_ring.status_page.page_addr;
	if (hws == NULL)
		return 0;

	for (i = 0; i < 4096 / sizeof(u32) / 4; i += 4) {
		seq_printf(m, "0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
			   i * 4,
			   hws[i], hws[i + 1], hws[i + 2], hws[i + 3]);
	}
	return 0;
}

static void i915_dump_pages(struct seq_file *m, struct page **pages, int page_count)
{
	int page, i;
	uint32_t *mem;

	for (page = 0; page < page_count; page++) {
		mem = kmap_atomic(pages[page], KM_USER0);
		for (i = 0; i < PAGE_SIZE; i += 4)
			seq_printf(m, "%08x :  %08x\n", i, mem[i / 4]);
		kunmap_atomic(mem, KM_USER0);
	}
}

static int i915_batchbuffer_info(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;
	struct drm_gem_object *obj;
	struct drm_i915_gem_object *obj_priv;
	int ret;

	spin_lock(&dev_priv->mm.active_list_lock);

	list_for_each_entry(obj_priv, &dev_priv->render_ring.active_list,
			list) {
		obj = &obj_priv->base;
		if (obj->read_domains & I915_GEM_DOMAIN_COMMAND) {
		    ret = i915_gem_object_get_pages(obj, 0);
		    if (ret) {
			    DRM_ERROR("Failed to get pages: %d\n", ret);
			    spin_unlock(&dev_priv->mm.active_list_lock);
			    return ret;
		    }

		    seq_printf(m, "--- gtt_offset = 0x%08x\n", obj_priv->gtt_offset);
		    i915_dump_pages(m, obj_priv->pages, obj->size / PAGE_SIZE);

		    i915_gem_object_put_pages(obj);
		}
	}

	spin_unlock(&dev_priv->mm.active_list_lock);

	return 0;
}

static int i915_ringbuffer_data(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;
	u8 *virt;
	uint32_t *ptr, off;

	if (!dev_priv->render_ring.gem_object) {
		seq_printf(m, "No ringbuffer setup\n");
		return 0;
	}

	virt = dev_priv->render_ring.virtual_start;

	for (off = 0; off < dev_priv->render_ring.size; off += 4) {
		ptr = (uint32_t *)(virt + off);
		seq_printf(m, "%08x :  %08x\n", off, *ptr);
	}

	return 0;
}

static int i915_ringbuffer_info(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;
	unsigned int head, tail;

	head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
	tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;

	seq_printf(m, "RingHead :  %08x\n", head);
	seq_printf(m, "RingTail :  %08x\n", tail);
	seq_printf(m, "RingSize :  %08lx\n", dev_priv->render_ring.size);
	seq_printf(m, "Acthd :     %08x\n", I915_READ(IS_I965G(dev) ? ACTHD_I965 : ACTHD));

	return 0;
}

static const char *pin_flag(int pinned)
{
	if (pinned > 0)
		return " P";
	else if (pinned < 0)
		return " p";
	else
		return "";
}

static const char *tiling_flag(int tiling)
{
	switch (tiling) {
	default:
	case I915_TILING_NONE: return "";
	case I915_TILING_X: return " X";
	case I915_TILING_Y: return " Y";
	}
}

static const char *dirty_flag(int dirty)
{
	return dirty ? " dirty" : "";
}

static const char *purgeable_flag(int purgeable)
{
	return purgeable ? " purgeable" : "";
}

static int i915_error_state(struct seq_file *m, void *unused)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;
	struct drm_i915_error_state *error;
	unsigned long flags;
	int i, page, offset, elt;

	spin_lock_irqsave(&dev_priv->error_lock, flags);
	if (!dev_priv->first_error) {
		seq_printf(m, "no error state collected\n");
		goto out;
	}

	error = dev_priv->first_error;

	seq_printf(m, "Time: %ld s %ld us\n", error->time.tv_sec,
		   error->time.tv_usec);
	seq_printf(m, "PCI ID: 0x%04x\n", dev->pci_device);
	seq_printf(m, "EIR: 0x%08x\n", error->eir);
	seq_printf(m, "  PGTBL_ER: 0x%08x\n", error->pgtbl_er);
	seq_printf(m, "  INSTPM: 0x%08x\n", error->instpm);
	seq_printf(m, "  IPEIR: 0x%08x\n", error->ipeir);
	seq_printf(m, "  IPEHR: 0x%08x\n", error->ipehr);
	seq_printf(m, "  INSTDONE: 0x%08x\n", error->instdone);
	seq_printf(m, "  ACTHD: 0x%08x\n", error->acthd);
	if (IS_I965G(dev)) {
		seq_printf(m, "  INSTPS: 0x%08x\n", error->instps);
		seq_printf(m, "  INSTDONE1: 0x%08x\n", error->instdone1);
	}
	seq_printf(m, "seqno: 0x%08x\n", error->seqno);

	if (error->active_bo_count) {
		seq_printf(m, "Buffers [%d]:\n", error->active_bo_count);

		for (i = 0; i < error->active_bo_count; i++) {
			seq_printf(m, "  %08x %8zd %08x %08x %08x%s%s%s%s",
				   error->active_bo[i].gtt_offset,
				   error->active_bo[i].size,
				   error->active_bo[i].read_domains,
				   error->active_bo[i].write_domain,
				   error->active_bo[i].seqno,
				   pin_flag(error->active_bo[i].pinned),
				   tiling_flag(error->active_bo[i].tiling),
				   dirty_flag(error->active_bo[i].dirty),
				   purgeable_flag(error->active_bo[i].purgeable));

			if (error->active_bo[i].name)
				seq_printf(m, " (name: %d)", error->active_bo[i].name);
			if (error->active_bo[i].fence_reg != I915_FENCE_REG_NONE)
				seq_printf(m, " (fence: %d)", error->active_bo[i].fence_reg);

			seq_printf(m, "\n");
		}
	}

	for (i = 0; i < ARRAY_SIZE(error->batchbuffer); i++) {
		if (error->batchbuffer[i]) {
			struct drm_i915_error_object *obj = error->batchbuffer[i];

			seq_printf(m, "--- gtt_offset = 0x%08x\n", obj->gtt_offset);
			offset = 0;
			for (page = 0; page < obj->page_count; page++) {
				for (elt = 0; elt < PAGE_SIZE/4; elt++) {
					seq_printf(m, "%08x :  %08x\n", offset, obj->pages[page][elt]);
					offset += 4;
				}
			}
		}
	}

	if (error->ringbuffer) {
		struct drm_i915_error_object *obj = error->ringbuffer;

		seq_printf(m, "--- ringbuffer = 0x%08x\n", obj->gtt_offset);
		offset = 0;
		for (page = 0; page < obj->page_count; page++) {
			for (elt = 0; elt < PAGE_SIZE/4; elt++) {
				seq_printf(m, "%08x :  %08x\n", offset, obj->pages[page][elt]);
				offset += 4;
			}
		}
	}

out:
	spin_unlock_irqrestore(&dev_priv->error_lock, flags);

	return 0;
}

static int i915_rstdby_delays(struct seq_file *m, void *unused)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;
	u16 crstanddelay = I915_READ16(CRSTANDVID);

	seq_printf(m, "w/ctx: %d, w/o ctx: %d\n", (crstanddelay >> 8) & 0x3f, (crstanddelay & 0x3f));

	return 0;
}

static int i915_cur_delayinfo(struct seq_file *m, void *unused)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;
	u16 rgvswctl = I915_READ16(MEMSWCTL);
	u16 rgvstat = I915_READ16(MEMSTAT_ILK);

	seq_printf(m, "Requested P-state: %d\n", (rgvswctl >> 8) & 0xf);
	seq_printf(m, "Requested VID: %d\n", rgvswctl & 0x3f);
	seq_printf(m, "Current VID: %d\n", (rgvstat & MEMSTAT_VID_MASK) >>
		   MEMSTAT_VID_SHIFT);
	seq_printf(m, "Current P-state: %d\n",
		   (rgvstat & MEMSTAT_PSTATE_MASK) >> MEMSTAT_PSTATE_SHIFT);

	return 0;
}

static int i915_delayfreq_table(struct seq_file *m, void *unused)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;
	u32 delayfreq;
	int i;

	for (i = 0; i < 16; i++) {
		delayfreq = I915_READ(PXVFREQ_BASE + i * 4);
		seq_printf(m, "P%02dVIDFREQ: 0x%08x (VID: %d)\n", i, delayfreq,
			   (delayfreq & PXVFREQ_PX_MASK) >> PXVFREQ_PX_SHIFT);
	}

	return 0;
}

static inline int MAP_TO_MV(int map)
{
	return 1250 - (map * 25);
}

static int i915_inttoext_table(struct seq_file *m, void *unused)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;
	u32 inttoext;
	int i;

	for (i = 1; i <= 32; i++) {
		inttoext = I915_READ(INTTOEXT_BASE_ILK + i * 4);
		seq_printf(m, "INTTOEXT%02d: 0x%08x\n", i, inttoext);
	}

	return 0;
}

static int i915_drpc_info(struct seq_file *m, void *unused)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;
	u32 rgvmodectl = I915_READ(MEMMODECTL);
	u32 rstdbyctl = I915_READ(MCHBAR_RENDER_STANDBY);
	u16 crstandvid = I915_READ16(CRSTANDVID);

	seq_printf(m, "HD boost: %s\n", (rgvmodectl & MEMMODE_BOOST_EN) ?
		   "yes" : "no");
	seq_printf(m, "Boost freq: %d\n",
		   (rgvmodectl & MEMMODE_BOOST_FREQ_MASK) >>
		   MEMMODE_BOOST_FREQ_SHIFT);
	seq_printf(m, "HW control enabled: %s\n",
		   rgvmodectl & MEMMODE_HWIDLE_EN ? "yes" : "no");
	seq_printf(m, "SW control enabled: %s\n",
		   rgvmodectl & MEMMODE_SWMODE_EN ? "yes" : "no");
	seq_printf(m, "Gated voltage change: %s\n",
		   rgvmodectl & MEMMODE_RCLK_GATE ? "yes" : "no");
	seq_printf(m, "Starting frequency: P%d\n",
		   (rgvmodectl & MEMMODE_FSTART_MASK) >> MEMMODE_FSTART_SHIFT);
	seq_printf(m, "Max P-state: P%d\n",
		   (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT);
	seq_printf(m, "Min P-state: P%d\n", (rgvmodectl & MEMMODE_FMIN_MASK));
	seq_printf(m, "RS1 VID: %d\n", (crstandvid & 0x3f));
	seq_printf(m, "RS2 VID: %d\n", ((crstandvid >> 8) & 0x3f));
	seq_printf(m, "Render standby enabled: %s\n",
		   (rstdbyctl & RCX_SW_EXIT) ? "no" : "yes");

	return 0;
}

static int i915_fbc_status(struct seq_file *m, void *unused)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;

	if (!I915_HAS_FBC(dev)) {
		seq_printf(m, "FBC unsupported on this chipset\n");
		return 0;
	}

	if (intel_fbc_enabled(dev)) {
		seq_printf(m, "FBC enabled\n");
	} else {
		seq_printf(m, "FBC disabled: ");
		switch (dev_priv->no_fbc_reason) {
		case FBC_STOLEN_TOO_SMALL:
			seq_printf(m, "not enough stolen memory");
			break;
		case FBC_UNSUPPORTED_MODE:
			seq_printf(m, "mode not supported");
			break;
		case FBC_MODE_TOO_LARGE:
			seq_printf(m, "mode too large");
			break;
		case FBC_BAD_PLANE:
			seq_printf(m, "FBC unsupported on plane");
			break;
		case FBC_NOT_TILED:
			seq_printf(m, "scanout buffer not tiled");
			break;
		default:
			seq_printf(m, "unknown reason");
		}
		seq_printf(m, "\n");
	}
	return 0;
}

static int i915_sr_status(struct seq_file *m, void *unused)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;
	bool sr_enabled = false;

	if (IS_I965G(dev) || IS_I945G(dev) || IS_I945GM(dev))
		sr_enabled = I915_READ(FW_BLC_SELF) & FW_BLC_SELF_EN;
	else if (IS_I915GM(dev))
		sr_enabled = I915_READ(INSTPM) & INSTPM_SELF_EN;
	else if (IS_PINEVIEW(dev))
		sr_enabled = I915_READ(DSPFW3) & PINEVIEW_SELF_REFRESH_EN;

	seq_printf(m, "self-refresh: %s\n", sr_enabled ? "enabled" :
		   "disabled");

	return 0;
}

static int i915_emon_status(struct seq_file *m, void *unused)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;
	unsigned long temp, chipset, gfx;

	temp = i915_mch_val(dev_priv);
	chipset = i915_chipset_val(dev_priv);
	gfx = i915_gfx_val(dev_priv);

	seq_printf(m, "GMCH temp: %ld\n", temp);
	seq_printf(m, "Chipset power: %ld\n", chipset);
	seq_printf(m, "GFX power: %ld\n", gfx);
	seq_printf(m, "Total power: %ld\n", chipset + gfx);

	return 0;
}

static int i915_gfxec(struct seq_file *m, void *unused)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	drm_i915_private_t *dev_priv = dev->dev_private;

	seq_printf(m, "GFXEC: %ld\n", (unsigned long)I915_READ(0x112f4));

	return 0;
}

static int
i915_wedged_open(struct inode *inode,
		 struct file *filp)
{
	filp->private_data = inode->i_private;
	return 0;
}

static ssize_t
i915_wedged_read(struct file *filp,
		 char __user *ubuf,
		 size_t max,
		 loff_t *ppos)
{
	struct drm_device *dev = filp->private_data;
	drm_i915_private_t *dev_priv = dev->dev_private;
	char buf[80];
	int len;

	len = snprintf(buf, sizeof (buf),
		       "wedged :  %d\n",
		       atomic_read(&dev_priv->mm.wedged));

	return simple_read_from_buffer(ubuf, max, ppos, buf, len);
}

static ssize_t
i915_wedged_write(struct file *filp,
		  const char __user *ubuf,
		  size_t cnt,
		  loff_t *ppos)
{
	struct drm_device *dev = filp->private_data;
	drm_i915_private_t *dev_priv = dev->dev_private;
	char buf[20];
	int val = 1;

	if (cnt > 0) {
		if (cnt > sizeof (buf) - 1)
			return -EINVAL;

		if (copy_from_user(buf, ubuf, cnt))
			return -EFAULT;
		buf[cnt] = 0;

		val = simple_strtoul(buf, NULL, 0);
	}

	DRM_INFO("Manually setting wedged to %d\n", val);

	atomic_set(&dev_priv->mm.wedged, val);
	if (val) {
		DRM_WAKEUP(&dev_priv->irq_queue);
		queue_work(dev_priv->wq, &dev_priv->error_work);
	}

	return cnt;
}

static const struct file_operations i915_wedged_fops = {
	.owner = THIS_MODULE,
	.open = i915_wedged_open,
	.read = i915_wedged_read,
	.write = i915_wedged_write,
};

/* As the drm_debugfs_init() routines are called before dev->dev_private is
 * allocated we need to hook into the minor for release. */
static int
drm_add_fake_info_node(struct drm_minor *minor,
		       struct dentry *ent,
		       const void *key)
{
	struct drm_info_node *node;

	node = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
	if (node == NULL) {
		debugfs_remove(ent);
		return -ENOMEM;
	}

	node->minor = minor;
	node->dent = ent;
	node->info_ent = (void *) key;
	list_add(&node->list, &minor->debugfs_nodes.list);

	return 0;
}

static int i915_wedged_create(struct dentry *root, struct drm_minor *minor)
{
	struct drm_device *dev = minor->dev;
	struct dentry *ent;

	ent = debugfs_create_file("i915_wedged",
				  S_IRUGO | S_IWUSR,
				  root, dev,
				  &i915_wedged_fops);
	if (IS_ERR(ent))
		return PTR_ERR(ent);

	return drm_add_fake_info_node(minor, ent, &i915_wedged_fops);
}

static struct drm_info_list i915_debugfs_list[] = {
	{"i915_gem_active", i915_gem_object_list_info, 0, (void *) ACTIVE_LIST},
	{"i915_gem_flushing", i915_gem_object_list_info, 0, (void *) FLUSHING_LIST},
	{"i915_gem_inactive", i915_gem_object_list_info, 0, (void *) INACTIVE_LIST},
	{"i915_gem_request", i915_gem_request_info, 0},
	{"i915_gem_seqno", i915_gem_seqno_info, 0},
	{"i915_gem_fence_regs", i915_gem_fence_regs_info, 0},
	{"i915_gem_interrupt", i915_interrupt_info, 0},
	{"i915_gem_hws", i915_hws_info, 0},
	{"i915_ringbuffer_data", i915_ringbuffer_data, 0},
	{"i915_ringbuffer_info", i915_ringbuffer_info, 0},
	{"i915_batchbuffers", i915_batchbuffer_info, 0},
	{"i915_error_state", i915_error_state, 0},
	{"i915_rstdby_delays", i915_rstdby_delays, 0},
	{"i915_cur_delayinfo", i915_cur_delayinfo, 0},
	{"i915_delayfreq_table", i915_delayfreq_table, 0},
	{"i915_inttoext_table", i915_inttoext_table, 0},
	{"i915_drpc_info", i915_drpc_info, 0},
	{"i915_emon_status", i915_emon_status, 0},
	{"i915_gfxec", i915_gfxec, 0},
	{"i915_fbc_status", i915_fbc_status, 0},
	{"i915_sr_status", i915_sr_status, 0},
};
#define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list)

int i915_debugfs_init(struct drm_minor *minor)
{
	int ret;

	ret = i915_wedged_create(minor->debugfs_root, minor);
	if (ret)
		return ret;

	return drm_debugfs_create_files(i915_debugfs_list,
					I915_DEBUGFS_ENTRIES,
					minor->debugfs_root, minor);
}

void i915_debugfs_cleanup(struct drm_minor *minor)
{
	drm_debugfs_remove_files(i915_debugfs_list,
				 I915_DEBUGFS_ENTRIES, minor);
	drm_debugfs_remove_files((struct drm_info_list *) &i915_wedged_fops,
				 1, minor);
}

#endif /* CONFIG_DEBUG_FS */