aboutsummaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/radeon/r600_blit_kms.c
blob: 2bef8549ddfeb9236f826ed5a9fc49d3558c490e (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
/*
 * Copyright 2009 Advanced Micro Devices, Inc.
 * Copyright 2009 Red Hat Inc.
 *
 * 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 COPYRIGHT HOLDER(S) AND/OR ITS SUPPLIERS 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.
 *
 */

#include "drmP.h"
#include "drm.h"
#include "radeon_drm.h"
#include "radeon.h"

#include "r600d.h"
#include "r600_blit_shaders.h"
#include "radeon_blit_common.h"

/* emits 21 on rv770+, 23 on r600 */
static void
set_render_target(struct radeon_device *rdev, int format,
		  int w, int h, u64 gpu_addr)
{
	struct radeon_ring *ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX];
	u32 cb_color_info;
	int pitch, slice;

	h = ALIGN(h, 8);
	if (h < 8)
		h = 8;

	cb_color_info = CB_FORMAT(format) |
		CB_SOURCE_FORMAT(CB_SF_EXPORT_NORM) |
		CB_ARRAY_MODE(ARRAY_1D_TILED_THIN1);
	pitch = (w / 8) - 1;
	slice = ((w * h) / 64) - 1;

	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONTEXT_REG, 1));
	radeon_ring_write(ring, (CB_COLOR0_BASE - PACKET3_SET_CONTEXT_REG_OFFSET) >> 2);
	radeon_ring_write(ring, gpu_addr >> 8);

	if (rdev->family > CHIP_R600 && rdev->family < CHIP_RV770) {
		radeon_ring_write(ring, PACKET3(PACKET3_SURFACE_BASE_UPDATE, 0));
		radeon_ring_write(ring, 2 << 0);
	}

	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONTEXT_REG, 1));
	radeon_ring_write(ring, (CB_COLOR0_SIZE - PACKET3_SET_CONTEXT_REG_OFFSET) >> 2);
	radeon_ring_write(ring, (pitch << 0) | (slice << 10));

	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONTEXT_REG, 1));
	radeon_ring_write(ring, (CB_COLOR0_VIEW - PACKET3_SET_CONTEXT_REG_OFFSET) >> 2);
	radeon_ring_write(ring, 0);

	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONTEXT_REG, 1));
	radeon_ring_write(ring, (CB_COLOR0_INFO - PACKET3_SET_CONTEXT_REG_OFFSET) >> 2);
	radeon_ring_write(ring, cb_color_info);

	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONTEXT_REG, 1));
	radeon_ring_write(ring, (CB_COLOR0_TILE - PACKET3_SET_CONTEXT_REG_OFFSET) >> 2);
	radeon_ring_write(ring, 0);

	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONTEXT_REG, 1));
	radeon_ring_write(ring, (CB_COLOR0_FRAG - PACKET3_SET_CONTEXT_REG_OFFSET) >> 2);
	radeon_ring_write(ring, 0);

	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONTEXT_REG, 1));
	radeon_ring_write(ring, (CB_COLOR0_MASK - PACKET3_SET_CONTEXT_REG_OFFSET) >> 2);
	radeon_ring_write(ring, 0);
}

/* emits 5dw */
static void
cp_set_surface_sync(struct radeon_device *rdev,
		    u32 sync_type, u32 size,
		    u64 mc_addr)
{
	struct radeon_ring *ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX];
	u32 cp_coher_size;

	if (size == 0xffffffff)
		cp_coher_size = 0xffffffff;
	else
		cp_coher_size = ((size + 255) >> 8);

	radeon_ring_write(ring, PACKET3(PACKET3_SURFACE_SYNC, 3));
	radeon_ring_write(ring, sync_type);
	radeon_ring_write(ring, cp_coher_size);
	radeon_ring_write(ring, mc_addr >> 8);
	radeon_ring_write(ring, 10); /* poll interval */
}

/* emits 21dw + 1 surface sync = 26dw */
static void
set_shaders(struct radeon_device *rdev)
{
	struct radeon_ring *ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX];
	u64 gpu_addr;
	u32 sq_pgm_resources;

	/* setup shader regs */
	sq_pgm_resources = (1 << 0);

	/* VS */
	gpu_addr = rdev->r600_blit.shader_gpu_addr + rdev->r600_blit.vs_offset;
	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONTEXT_REG, 1));
	radeon_ring_write(ring, (SQ_PGM_START_VS - PACKET3_SET_CONTEXT_REG_OFFSET) >> 2);
	radeon_ring_write(ring, gpu_addr >> 8);

	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONTEXT_REG, 1));
	radeon_ring_write(ring, (SQ_PGM_RESOURCES_VS - PACKET3_SET_CONTEXT_REG_OFFSET) >> 2);
	radeon_ring_write(ring, sq_pgm_resources);

	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONTEXT_REG, 1));
	radeon_ring_write(ring, (SQ_PGM_CF_OFFSET_VS - PACKET3_SET_CONTEXT_REG_OFFSET) >> 2);
	radeon_ring_write(ring, 0);

	/* PS */
	gpu_addr = rdev->r600_blit.shader_gpu_addr + rdev->r600_blit.ps_offset;
	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONTEXT_REG, 1));
	radeon_ring_write(ring, (SQ_PGM_START_PS - PACKET3_SET_CONTEXT_REG_OFFSET) >> 2);
	radeon_ring_write(ring, gpu_addr >> 8);

	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONTEXT_REG, 1));
	radeon_ring_write(ring, (SQ_PGM_RESOURCES_PS - PACKET3_SET_CONTEXT_REG_OFFSET) >> 2);
	radeon_ring_write(ring, sq_pgm_resources | (1 << 28));

	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONTEXT_REG, 1));
	radeon_ring_write(ring, (SQ_PGM_EXPORTS_PS - PACKET3_SET_CONTEXT_REG_OFFSET) >> 2);
	radeon_ring_write(ring, 2);

	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONTEXT_REG, 1));
	radeon_ring_write(ring, (SQ_PGM_CF_OFFSET_PS - PACKET3_SET_CONTEXT_REG_OFFSET) >> 2);
	radeon_ring_write(ring, 0);

	gpu_addr = rdev->r600_blit.shader_gpu_addr + rdev->r600_blit.vs_offset;
	cp_set_surface_sync(rdev, PACKET3_SH_ACTION_ENA, 512, gpu_addr);
}

/* emits 9 + 1 sync (5) = 14*/
static void
set_vtx_resource(struct radeon_device *rdev, u64 gpu_addr)
{
	struct radeon_ring *ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX];
	u32 sq_vtx_constant_word2;

	sq_vtx_constant_word2 = SQ_VTXC_BASE_ADDR_HI(upper_32_bits(gpu_addr) & 0xff) |
		SQ_VTXC_STRIDE(16);
#ifdef __BIG_ENDIAN
	sq_vtx_constant_word2 |=  SQ_VTXC_ENDIAN_SWAP(SQ_ENDIAN_8IN32);
#endif

	radeon_ring_write(ring, PACKET3(PACKET3_SET_RESOURCE, 7));
	radeon_ring_write(ring, 0x460);
	radeon_ring_write(ring, gpu_addr & 0xffffffff);
	radeon_ring_write(ring, 48 - 1);
	radeon_ring_write(ring, sq_vtx_constant_word2);
	radeon_ring_write(ring, 1 << 0);
	radeon_ring_write(ring, 0);
	radeon_ring_write(ring, 0);
	radeon_ring_write(ring, SQ_TEX_VTX_VALID_BUFFER << 30);

	if ((rdev->family == CHIP_RV610) ||
	    (rdev->family == CHIP_RV620) ||
	    (rdev->family == CHIP_RS780) ||
	    (rdev->family == CHIP_RS880) ||
	    (rdev->family == CHIP_RV710))
		cp_set_surface_sync(rdev,
				    PACKET3_TC_ACTION_ENA, 48, gpu_addr);
	else
		cp_set_surface_sync(rdev,
				    PACKET3_VC_ACTION_ENA, 48, gpu_addr);
}

/* emits 9 */
static void
set_tex_resource(struct radeon_device *rdev,
		 int format, int w, int h, int pitch,
		 u64 gpu_addr, u32 size)
{
	struct radeon_ring *ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX];
	uint32_t sq_tex_resource_word0, sq_tex_resource_word1, sq_tex_resource_word4;

	if (h < 1)
		h = 1;

	sq_tex_resource_word0 = S_038000_DIM(V_038000_SQ_TEX_DIM_2D) |
		S_038000_TILE_MODE(V_038000_ARRAY_1D_TILED_THIN1);
	sq_tex_resource_word0 |= S_038000_PITCH((pitch >> 3) - 1) |
		S_038000_TEX_WIDTH(w - 1);

	sq_tex_resource_word1 = S_038004_DATA_FORMAT(format);
	sq_tex_resource_word1 |= S_038004_TEX_HEIGHT(h - 1);

	sq_tex_resource_word4 = S_038010_REQUEST_SIZE(1) |
		S_038010_DST_SEL_X(SQ_SEL_X) |
		S_038010_DST_SEL_Y(SQ_SEL_Y) |
		S_038010_DST_SEL_Z(SQ_SEL_Z) |
		S_038010_DST_SEL_W(SQ_SEL_W);

	cp_set_surface_sync(rdev,
			    PACKET3_TC_ACTION_ENA, size, gpu_addr);

	radeon_ring_write(ring, PACKET3(PACKET3_SET_RESOURCE, 7));
	radeon_ring_write(ring, 0);
	radeon_ring_write(ring, sq_tex_resource_word0);
	radeon_ring_write(ring, sq_tex_resource_word1);
	radeon_ring_write(ring, gpu_addr >> 8);
	radeon_ring_write(ring, gpu_addr >> 8);
	radeon_ring_write(ring, sq_tex_resource_word4);
	radeon_ring_write(ring, 0);
	radeon_ring_write(ring, SQ_TEX_VTX_VALID_TEXTURE << 30);
}

/* emits 12 */
static void
set_scissors(struct radeon_device *rdev, int x1, int y1,
	     int x2, int y2)
{
	struct radeon_ring *ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX];
	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONTEXT_REG, 2));
	radeon_ring_write(ring, (PA_SC_SCREEN_SCISSOR_TL - PACKET3_SET_CONTEXT_REG_OFFSET) >> 2);
	radeon_ring_write(ring, (x1 << 0) | (y1 << 16));
	radeon_ring_write(ring, (x2 << 0) | (y2 << 16));

	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONTEXT_REG, 2));
	radeon_ring_write(ring, (PA_SC_GENERIC_SCISSOR_TL - PACKET3_SET_CONTEXT_REG_OFFSET) >> 2);
	radeon_ring_write(ring, (x1 << 0) | (y1 << 16) | (1 << 31));
	radeon_ring_write(ring, (x2 << 0) | (y2 << 16));

	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONTEXT_REG, 2));
	radeon_ring_write(ring, (PA_SC_WINDOW_SCISSOR_TL - PACKET3_SET_CONTEXT_REG_OFFSET) >> 2);
	radeon_ring_write(ring, (x1 << 0) | (y1 << 16) | (1 << 31));
	radeon_ring_write(ring, (x2 << 0) | (y2 << 16));
}

/* emits 10 */
static void
draw_auto(struct radeon_device *rdev)
{
	struct radeon_ring *ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX];
	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONFIG_REG, 1));
	radeon_ring_write(ring, (VGT_PRIMITIVE_TYPE - PACKET3_SET_CONFIG_REG_OFFSET) >> 2);
	radeon_ring_write(ring, DI_PT_RECTLIST);

	radeon_ring_write(ring, PACKET3(PACKET3_INDEX_TYPE, 0));
	radeon_ring_write(ring,
#ifdef __BIG_ENDIAN
			  (2 << 2) |
#endif
			  DI_INDEX_SIZE_16_BIT);

	radeon_ring_write(ring, PACKET3(PACKET3_NUM_INSTANCES, 0));
	radeon_ring_write(ring, 1);

	radeon_ring_write(ring, PACKET3(PACKET3_DRAW_INDEX_AUTO, 1));
	radeon_ring_write(ring, 3);
	radeon_ring_write(ring, DI_SRC_SEL_AUTO_INDEX);

}

/* emits 14 */
static void
set_default_state(struct radeon_device *rdev)
{
	struct radeon_ring *ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX];
	u32 sq_config, sq_gpr_resource_mgmt_1, sq_gpr_resource_mgmt_2;
	u32 sq_thread_resource_mgmt, sq_stack_resource_mgmt_1, sq_stack_resource_mgmt_2;
	int num_ps_gprs, num_vs_gprs, num_temp_gprs, num_gs_gprs, num_es_gprs;
	int num_ps_threads, num_vs_threads, num_gs_threads, num_es_threads;
	int num_ps_stack_entries, num_vs_stack_entries, num_gs_stack_entries, num_es_stack_entries;
	u64 gpu_addr;
	int dwords;

	switch (rdev->family) {
	case CHIP_R600:
		num_ps_gprs = 192;
		num_vs_gprs = 56;
		num_temp_gprs = 4;
		num_gs_gprs = 0;
		num_es_gprs = 0;
		num_ps_threads = 136;
		num_vs_threads = 48;
		num_gs_threads = 4;
		num_es_threads = 4;
		num_ps_stack_entries = 128;
		num_vs_stack_entries = 128;
		num_gs_stack_entries = 0;
		num_es_stack_entries = 0;
		break;
	case CHIP_RV630:
	case CHIP_RV635:
		num_ps_gprs = 84;
		num_vs_gprs = 36;
		num_temp_gprs = 4;
		num_gs_gprs = 0;
		num_es_gprs = 0;
		num_ps_threads = 144;
		num_vs_threads = 40;
		num_gs_threads = 4;
		num_es_threads = 4;
		num_ps_stack_entries = 40;
		num_vs_stack_entries = 40;
		num_gs_stack_entries = 32;
		num_es_stack_entries = 16;
		break;
	case CHIP_RV610:
	case CHIP_RV620:
	case CHIP_RS780:
	case CHIP_RS880:
	default:
		num_ps_gprs = 84;
		num_vs_gprs = 36;
		num_temp_gprs = 4;
		num_gs_gprs = 0;
		num_es_gprs = 0;
		num_ps_threads = 136;
		num_vs_threads = 48;
		num_gs_threads = 4;
		num_es_threads = 4;
		num_ps_stack_entries = 40;
		num_vs_stack_entries = 40;
		num_gs_stack_entries = 32;
		num_es_stack_entries = 16;
		break;
	case CHIP_RV670:
		num_ps_gprs = 144;
		num_vs_gprs = 40;
		num_temp_gprs = 4;
		num_gs_gprs = 0;
		num_es_gprs = 0;
		num_ps_threads = 136;
		num_vs_threads = 48;
		num_gs_threads = 4;
		num_es_threads = 4;
		num_ps_stack_entries = 40;
		num_vs_stack_entries = 40;
		num_gs_stack_entries = 32;
		num_es_stack_entries = 16;
		break;
	case CHIP_RV770:
		num_ps_gprs = 192;
		num_vs_gprs = 56;
		num_temp_gprs = 4;
		num_gs_gprs = 0;
		num_es_gprs = 0;
		num_ps_threads = 188;
		num_vs_threads = 60;
		num_gs_threads = 0;
		num_es_threads = 0;
		num_ps_stack_entries = 256;
		num_vs_stack_entries = 256;
		num_gs_stack_entries = 0;
		num_es_stack_entries = 0;
		break;
	case CHIP_RV730:
	case CHIP_RV740:
		num_ps_gprs = 84;
		num_vs_gprs = 36;
		num_temp_gprs = 4;
		num_gs_gprs = 0;
		num_es_gprs = 0;
		num_ps_threads = 188;
		num_vs_threads = 60;
		num_gs_threads = 0;
		num_es_threads = 0;
		num_ps_stack_entries = 128;
		num_vs_stack_entries = 128;
		num_gs_stack_entries = 0;
		num_es_stack_entries = 0;
		break;
	case CHIP_RV710:
		num_ps_gprs = 192;
		num_vs_gprs = 56;
		num_temp_gprs = 4;
		num_gs_gprs = 0;
		num_es_gprs = 0;
		num_ps_threads = 144;
		num_vs_threads = 48;
		num_gs_threads = 0;
		num_es_threads = 0;
		num_ps_stack_entries = 128;
		num_vs_stack_entries = 128;
		num_gs_stack_entries = 0;
		num_es_stack_entries = 0;
		break;
	}

	if ((rdev->family == CHIP_RV610) ||
	    (rdev->family == CHIP_RV620) ||
	    (rdev->family == CHIP_RS780) ||
	    (rdev->family == CHIP_RS880) ||
	    (rdev->family == CHIP_RV710))
		sq_config = 0;
	else
		sq_config = VC_ENABLE;

	sq_config |= (DX9_CONSTS |
		      ALU_INST_PREFER_VECTOR |
		      PS_PRIO(0) |
		      VS_PRIO(1) |
		      GS_PRIO(2) |
		      ES_PRIO(3));

	sq_gpr_resource_mgmt_1 = (NUM_PS_GPRS(num_ps_gprs) |
				  NUM_VS_GPRS(num_vs_gprs) |
				  NUM_CLAUSE_TEMP_GPRS(num_temp_gprs));
	sq_gpr_resource_mgmt_2 = (NUM_GS_GPRS(num_gs_gprs) |
				  NUM_ES_GPRS(num_es_gprs));
	sq_thread_resource_mgmt = (NUM_PS_THREADS(num_ps_threads) |
				   NUM_VS_THREADS(num_vs_threads) |
				   NUM_GS_THREADS(num_gs_threads) |
				   NUM_ES_THREADS(num_es_threads));
	sq_stack_resource_mgmt_1 = (NUM_PS_STACK_ENTRIES(num_ps_stack_entries) |
				    NUM_VS_STACK_ENTRIES(num_vs_stack_entries));
	sq_stack_resource_mgmt_2 = (NUM_GS_STACK_ENTRIES(num_gs_stack_entries) |
				    NUM_ES_STACK_ENTRIES(num_es_stack_entries));

	/* emit an IB pointing at default state */
	dwords = ALIGN(rdev->r600_blit.state_len, 0x10);
	gpu_addr = rdev->r600_blit.shader_gpu_addr + rdev->r600_blit.state_offset;
	radeon_ring_write(ring, PACKET3(PACKET3_INDIRECT_BUFFER, 2));
	radeon_ring_write(ring,
#ifdef __BIG_ENDIAN
			  (2 << 0) |
#endif
			  (gpu_addr & 0xFFFFFFFC));
	radeon_ring_write(ring, upper_32_bits(gpu_addr) & 0xFF);
	radeon_ring_write(ring, dwords);

	/* SQ config */
	radeon_ring_write(ring, PACKET3(PACKET3_SET_CONFIG_REG, 6));
	radeon_ring_write(ring, (SQ_CONFIG - PACKET3_SET_CONFIG_REG_OFFSET) >> 2);
	radeon_ring_write(ring, sq_config);
	radeon_ring_write(ring, sq_gpr_resource_mgmt_1);
	radeon_ring_write(ring, sq_gpr_resource_mgmt_2);
	radeon_ring_write(ring, sq_thread_resource_mgmt);
	radeon_ring_write(ring, sq_stack_resource_mgmt_1);
	radeon_ring_write(ring, sq_stack_resource_mgmt_2);
}

#define I2F_MAX_BITS 15
#define I2F_MAX_INPUT  ((1 << I2F_MAX_BITS) - 1)
#define I2F_SHIFT (24 - I2F_MAX_BITS)

/*
 * Converts unsigned integer into 32-bit IEEE floating point representation.
 * Conversion is not universal and only works for the range from 0
 * to 2^I2F_MAX_BITS-1. Currently we only use it with inputs between
 * 0 and 16384 (inclusive), so I2F_MAX_BITS=15 is enough. If necessary,
 * I2F_MAX_BITS can be increased, but that will add to the loop iterations
 * and slow us down. Conversion is done by shifting the input and counting
 * down until the first 1 reaches bit position 23. The resulting counter
 * and the shifted input are, respectively, the exponent and the fraction.
 * The sign is always zero.
 */
static uint32_t i2f(uint32_t input)
{
	u32 result, i, exponent, fraction;

	WARN_ON_ONCE(input > I2F_MAX_INPUT);

	if ((input & I2F_MAX_INPUT) == 0)
		result = 0;
	else {
		exponent = 126 + I2F_MAX_BITS;
		fraction = (input & I2F_MAX_INPUT) << I2F_SHIFT;

		for (i = 0; i < I2F_MAX_BITS; i++) {
			if (fraction & 0x800000)
				break;
			else {
				fraction = fraction << 1;
				exponent = exponent - 1;
			}
		}
		result = exponent << 23 | (fraction & 0x7fffff);
	}
	return result;
}

int r600_blit_init(struct radeon_device *rdev)
{
	u32 obj_size;
	int i, r, dwords;
	void *ptr;
	u32 packet2s[16];
	int num_packet2s = 0;

	rdev->r600_blit.primitives.set_render_target = set_render_target;
	rdev->r600_blit.primitives.cp_set_surface_sync = cp_set_surface_sync;
	rdev->r600_blit.primitives.set_shaders = set_shaders;
	rdev->r600_blit.primitives.set_vtx_resource = set_vtx_resource;
	rdev->r600_blit.primitives.set_tex_resource = set_tex_resource;
	rdev->r600_blit.primitives.set_scissors = set_scissors;
	rdev->r600_blit.primitives.draw_auto = draw_auto;
	rdev->r600_blit.primitives.set_default_state = set_default_state;

	rdev->r600_blit.ring_size_common = 8; /* sync semaphore */
	rdev->r600_blit.ring_size_common += 40; /* shaders + def state */
	rdev->r600_blit.ring_size_common += 5; /* done copy */
	rdev->r600_blit.ring_size_common += 16; /* fence emit for done copy */

	rdev->r600_blit.ring_size_per_loop = 76;
	/* set_render_target emits 2 extra dwords on rv6xx */
	if (rdev->family > CHIP_R600 && rdev->family < CHIP_RV770)
		rdev->r600_blit.ring_size_per_loop += 2;

	rdev->r600_blit.max_dim = 8192;

	rdev->r600_blit.state_offset = 0;

	if (rdev->family >= CHIP_RV770)
		rdev->r600_blit.state_len = r7xx_default_size;
	else
		rdev->r600_blit.state_len = r6xx_default_size;

	dwords = rdev->r600_blit.state_len;
	while (dwords & 0xf) {
		packet2s[num_packet2s++] = cpu_to_le32(PACKET2(0));
		dwords++;
	}

	obj_size = dwords * 4;
	obj_size = ALIGN(obj_size, 256);

	rdev->r600_blit.vs_offset = obj_size;
	obj_size += r6xx_vs_size * 4;
	obj_size = ALIGN(obj_size, 256);

	rdev->r600_blit.ps_offset = obj_size;
	obj_size += r6xx_ps_size * 4;
	obj_size = ALIGN(obj_size, 256);

	/* pin copy shader into vram if not already initialized */
	if (rdev->r600_blit.shader_obj == NULL) {
		r = radeon_bo_create(rdev, obj_size, PAGE_SIZE, true,
				     RADEON_GEM_DOMAIN_VRAM,
				     NULL, &rdev->r600_blit.shader_obj);
		if (r) {
			DRM_ERROR("r600 failed to allocate shader\n");
			return r;
		}

		r = radeon_bo_reserve(rdev->r600_blit.shader_obj, false);
		if (unlikely(r != 0))
			return r;
		r = radeon_bo_pin(rdev->r600_blit.shader_obj, RADEON_GEM_DOMAIN_VRAM,
				  &rdev->r600_blit.shader_gpu_addr);
		radeon_bo_unreserve(rdev->r600_blit.shader_obj);
		if (r) {
			dev_err(rdev->dev, "(%d) pin blit object failed\n", r);
			return r;
		}
	}

	DRM_DEBUG("r6xx blit allocated bo %08x vs %08x ps %08x\n",
		  obj_size,
		  rdev->r600_blit.vs_offset, rdev->r600_blit.ps_offset);

	r = radeon_bo_reserve(rdev->r600_blit.shader_obj, false);
	if (unlikely(r != 0))
		return r;
	r = radeon_bo_kmap(rdev->r600_blit.shader_obj, &ptr);
	if (r) {
		DRM_ERROR("failed to map blit object %d\n", r);
		return r;
	}
	if (rdev->family >= CHIP_RV770)
		memcpy_toio(ptr + rdev->r600_blit.state_offset,
			    r7xx_default_state, rdev->r600_blit.state_len * 4);
	else
		memcpy_toio(ptr + rdev->r600_blit.state_offset,
			    r6xx_default_state, rdev->r600_blit.state_len * 4);
	if (num_packet2s)
		memcpy_toio(ptr + rdev->r600_blit.state_offset + (rdev->r600_blit.state_len * 4),
			    packet2s, num_packet2s * 4);
	for (i = 0; i < r6xx_vs_size; i++)
		*(u32 *)((unsigned long)ptr + rdev->r600_blit.vs_offset + i * 4) = cpu_to_le32(r6xx_vs[i]);
	for (i = 0; i < r6xx_ps_size; i++)
		*(u32 *)((unsigned long)ptr + rdev->r600_blit.ps_offset + i * 4) = cpu_to_le32(r6xx_ps[i]);
	radeon_bo_kunmap(rdev->r600_blit.shader_obj);
	radeon_bo_unreserve(rdev->r600_blit.shader_obj);

	radeon_ttm_set_active_vram_size(rdev, rdev->mc.real_vram_size);
	return 0;
}

void r600_blit_fini(struct radeon_device *rdev)
{
	int r;

	radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size);
	if (rdev->r600_blit.shader_obj == NULL)
		return;
	/* If we can't reserve the bo, unref should be enough to destroy
	 * it when it becomes idle.
	 */
	r = radeon_bo_reserve(rdev->r600_blit.shader_obj, false);
	if (!r) {
		radeon_bo_unpin(rdev->r600_blit.shader_obj);
		radeon_bo_unreserve(rdev->r600_blit.shader_obj);
	}
	radeon_bo_unref(&rdev->r600_blit.shader_obj);
}

static unsigned r600_blit_create_rect(unsigned num_gpu_pages,
				      int *width, int *height, int max_dim)
{
	unsigned max_pages;
	unsigned pages = num_gpu_pages;
	int w, h;

	if (num_gpu_pages == 0) {
		/* not supposed to be called with no pages, but just in case */
		h = 0;
		w = 0;
		pages = 0;
		WARN_ON(1);
	} else {
		int rect_order = 2;
		h = RECT_UNIT_H;
		while (num_gpu_pages / rect_order) {
			h *= 2;
			rect_order *= 4;
			if (h >= max_dim) {
				h = max_dim;
				break;
			}
		}
		max_pages = (max_dim * h) / (RECT_UNIT_W * RECT_UNIT_H);
		if (pages > max_pages)
			pages = max_pages;
		w = (pages * RECT_UNIT_W * RECT_UNIT_H) / h;
		w = (w / RECT_UNIT_W) * RECT_UNIT_W;
		pages = (w * h) / (RECT_UNIT_W * RECT_UNIT_H);
		BUG_ON(pages == 0);
	}


	DRM_DEBUG("blit_rectangle: h=%d, w=%d, pages=%d\n", h, w, pages);

	/* return width and height only of the caller wants it */
	if (height)
		*height = h;
	if (width)
		*width = w;

	return pages;
}


int r600_blit_prepare_copy(struct radeon_device *rdev, unsigned num_gpu_pages,
			   struct radeon_fence **fence, struct radeon_sa_bo **vb,
			   struct radeon_semaphore **sem)
{
	struct radeon_ring *ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX];
	int r;
	int ring_size;
	int num_loops = 0;
	int dwords_per_loop = rdev->r600_blit.ring_size_per_loop;

	/* num loops */
	while (num_gpu_pages) {
		num_gpu_pages -=
			r600_blit_create_rect(num_gpu_pages, NULL, NULL,
					      rdev->r600_blit.max_dim);
		num_loops++;
	}

	/* 48 bytes for vertex per loop */
	r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, vb,
			     (num_loops*48)+256, 256, true);
	if (r) {
		return r;
	}

	r = radeon_semaphore_create(rdev, sem);
	if (r) {
		radeon_sa_bo_free(rdev, vb, NULL);
		return r;
	}

	/* calculate number of loops correctly */
	ring_size = num_loops * dwords_per_loop;
	ring_size += rdev->r600_blit.ring_size_common;
	r = radeon_ring_lock(rdev, ring, ring_size);
	if (r) {
		radeon_sa_bo_free(rdev, vb, NULL);
		radeon_semaphore_free(rdev, sem, NULL);
		return r;
	}

	if (radeon_fence_need_sync(*fence, RADEON_RING_TYPE_GFX_INDEX)) {
		radeon_semaphore_sync_rings(rdev, *sem, (*fence)->ring,
					    RADEON_RING_TYPE_GFX_INDEX);
		radeon_fence_note_sync(*fence, RADEON_RING_TYPE_GFX_INDEX);
	} else {
		radeon_semaphore_free(rdev, sem, NULL);
	}

	rdev->r600_blit.primitives.set_default_state(rdev);
	rdev->r600_blit.primitives.set_shaders(rdev);
	return 0;
}

void r600_blit_done_copy(struct radeon_device *rdev, struct radeon_fence **fence,
			 struct radeon_sa_bo *vb, struct radeon_semaphore *sem)
{
	struct radeon_ring *ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX];
	int r;

	r = radeon_fence_emit(rdev, fence, RADEON_RING_TYPE_GFX_INDEX);
	if (r) {
		radeon_ring_unlock_undo(rdev, ring);
		return;
	}

	radeon_ring_unlock_commit(rdev, ring);
	radeon_sa_bo_free(rdev, &vb, *fence);
	radeon_semaphore_free(rdev, &sem, *fence);
}

void r600_kms_blit_copy(struct radeon_device *rdev,
			u64 src_gpu_addr, u64 dst_gpu_addr,
			unsigned num_gpu_pages,
			struct radeon_sa_bo *vb)
{
	u64 vb_gpu_addr;
	u32 *vb_cpu_addr;

	DRM_DEBUG("emitting copy %16llx %16llx %d\n",
		  src_gpu_addr, dst_gpu_addr, num_gpu_pages);
	vb_cpu_addr = (u32 *)radeon_sa_bo_cpu_addr(vb);
	vb_gpu_addr = radeon_sa_bo_gpu_addr(vb);

	while (num_gpu_pages) {
		int w, h;
		unsigned size_in_bytes;
		unsigned pages_per_loop =
			r600_blit_create_rect(num_gpu_pages, &w, &h,
					      rdev->r600_blit.max_dim);

		size_in_bytes = pages_per_loop * RADEON_GPU_PAGE_SIZE;
		DRM_DEBUG("rectangle w=%d h=%d\n", w, h);

		vb_cpu_addr[0] = 0;
		vb_cpu_addr[1] = 0;
		vb_cpu_addr[2] = 0;
		vb_cpu_addr[3] = 0;

		vb_cpu_addr[4] = 0;
		vb_cpu_addr[5] = i2f(h);
		vb_cpu_addr[6] = 0;
		vb_cpu_addr[7] = i2f(h);

		vb_cpu_addr[8] = i2f(w);
		vb_cpu_addr[9] = i2f(h);
		vb_cpu_addr[10] = i2f(w);
		vb_cpu_addr[11] = i2f(h);

		rdev->r600_blit.primitives.set_tex_resource(rdev, FMT_8_8_8_8,
							    w, h, w, src_gpu_addr, size_in_bytes);
		rdev->r600_blit.primitives.set_render_target(rdev, COLOR_8_8_8_8,
							     w, h, dst_gpu_addr);
		rdev->r600_blit.primitives.set_scissors(rdev, 0, 0, w, h);
		rdev->r600_blit.primitives.set_vtx_resource(rdev, vb_gpu_addr);
		rdev->r600_blit.primitives.draw_auto(rdev);
		rdev->r600_blit.primitives.cp_set_surface_sync(rdev,
				    PACKET3_CB_ACTION_ENA | PACKET3_CB0_DEST_BASE_ENA,
				    size_in_bytes, dst_gpu_addr);

		vb_cpu_addr += 12;
		vb_gpu_addr += 4*12;
		src_gpu_addr += size_in_bytes;
		dst_gpu_addr += size_in_bytes;
		num_gpu_pages -= pages_per_loop;
	}
}