summaryrefslogtreecommitdiffstats
path: root/src/mesa/drivers/dri/i915/intel_screen.c
blob: d93bd9be59e7fea170370bb1f3291987312fd796 (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
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
/**************************************************************************
 * 
 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * 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, sub license, 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 NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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 <errno.h>
#include <time.h>
#include <unistd.h>
#include "main/glheader.h"
#include "main/context.h"
#include "main/framebuffer.h"
#include "main/renderbuffer.h"
#include "main/texobj.h"
#include "main/hash.h"
#include "main/fbobject.h"
#include "main/version.h"
#include "swrast/s_renderbuffer.h"

#include "utils.h"
#include "xmlpool.h"

static const __DRIconfigOptionsExtension i915_config_options = {
   .base = { __DRI_CONFIG_OPTIONS, 1 },
   .xml =

DRI_CONF_BEGIN
   DRI_CONF_SECTION_PERFORMANCE
      DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
      /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
       * DRI_CONF_BO_REUSE_ALL
       */
      DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
	 DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
	    DRI_CONF_ENUM(0, "Disable buffer object reuse")
	    DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
	 DRI_CONF_DESC_END
      DRI_CONF_OPT_END

      DRI_CONF_OPT_BEGIN_B(early_z, "false")
	 DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
      DRI_CONF_OPT_END

   DRI_CONF_SECTION_END
   DRI_CONF_SECTION_QUALITY
      DRI_CONF_FORCE_S3TC_ENABLE("false")
   DRI_CONF_SECTION_END
   DRI_CONF_SECTION_DEBUG
      DRI_CONF_NO_RAST("false")
      DRI_CONF_ALWAYS_FLUSH_BATCH("false")
      DRI_CONF_ALWAYS_FLUSH_CACHE("false")
      DRI_CONF_DISABLE_THROTTLING("false")
      DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN("false")
      DRI_CONF_DISABLE_GLSL_LINE_CONTINUATIONS("false")
      DRI_CONF_DISABLE_BLEND_FUNC_EXTENDED("false")

      DRI_CONF_OPT_BEGIN_B(shader_precompile, "true")
	 DRI_CONF_DESC(en, "Perform code generation at shader link time.")
      DRI_CONF_OPT_END
   DRI_CONF_SECTION_END
DRI_CONF_END
};

#include "intel_batchbuffer.h"
#include "intel_buffers.h"
#include "intel_bufmgr.h"
#include "intel_chipset.h"
#include "intel_fbo.h"
#include "intel_mipmap_tree.h"
#include "intel_screen.h"
#include "intel_tex.h"
#include "intel_regions.h"

#include "i915_drm.h"

#ifdef USE_NEW_INTERFACE
static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
#endif /*USE_NEW_INTERFACE */

/**
 * For debugging purposes, this returns a time in seconds.
 */
double
get_time(void)
{
   struct timespec tp;

   clock_gettime(CLOCK_MONOTONIC, &tp);

   return tp.tv_sec + tp.tv_nsec / 1000000000.0;
}

void
aub_dump_bmp(struct gl_context *ctx)
{
   struct gl_framebuffer *fb = ctx->DrawBuffer;

   for (int i = 0; i < fb->_NumColorDrawBuffers; i++) {
      struct intel_renderbuffer *irb =
	 intel_renderbuffer(fb->_ColorDrawBuffers[i]);

      if (irb && irb->mt) {
	 enum aub_dump_bmp_format format;

	 switch (irb->Base.Base.Format) {
	 case MESA_FORMAT_ARGB8888:
	 case MESA_FORMAT_XRGB8888:
	    format = AUB_DUMP_BMP_FORMAT_ARGB_8888;
	    break;
	 default:
	    continue;
	 }

         assert(irb->mt->region->pitch % irb->mt->region->cpp == 0);
	 drm_intel_gem_bo_aub_dump_bmp(irb->mt->region->bo,
				       irb->draw_x,
				       irb->draw_y,
				       irb->Base.Base.Width,
				       irb->Base.Base.Height,
				       format,
				       irb->mt->region->pitch,
				       0);
      }
   }
}

static const __DRItexBufferExtension intelTexBufferExtension = {
   .base = { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },

   .setTexBuffer        = intelSetTexBuffer,
   .setTexBuffer2       = intelSetTexBuffer2,
   .releaseTexBuffer    = NULL,
};

static void
intelDRI2Flush(__DRIdrawable *drawable)
{
   GET_CURRENT_CONTEXT(ctx);
   struct intel_context *intel = intel_context(ctx);
   if (intel == NULL)
      return;

   INTEL_FIREVERTICES(intel);

   intel->need_throttle = true;

   if (intel->batch.used)
      intel_batchbuffer_flush(intel);

   if (INTEL_DEBUG & DEBUG_AUB) {
      aub_dump_bmp(ctx);
   }
}

static const struct __DRI2flushExtensionRec intelFlushExtension = {
    .base = { __DRI2_FLUSH, 3 },

    .flush              = intelDRI2Flush,
    .invalidate         = dri2InvalidateDrawable,
};

static struct intel_image_format intel_image_formats[] = {
   { __DRI_IMAGE_FOURCC_ARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
     { { 0, 0, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } },

   { __DRI_IMAGE_FOURCC_XRGB8888, __DRI_IMAGE_COMPONENTS_RGB, 1,
     { { 0, 0, 0, __DRI_IMAGE_FORMAT_XRGB8888, 4 }, } },

   { __DRI_IMAGE_FOURCC_YUV410, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
     { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
       { 1, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 },
       { 2, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 } } },

   { __DRI_IMAGE_FOURCC_YUV411, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
     { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
       { 1, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 },
       { 2, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },

   { __DRI_IMAGE_FOURCC_YUV420, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
     { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
       { 1, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 },
       { 2, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 } } },

   { __DRI_IMAGE_FOURCC_YUV422, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
     { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
       { 1, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 },
       { 2, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },

   { __DRI_IMAGE_FOURCC_YUV444, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
     { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
       { 1, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
       { 2, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },

   { __DRI_IMAGE_FOURCC_NV12, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
     { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
       { 1, 1, 1, __DRI_IMAGE_FORMAT_GR88, 2 } } },

   { __DRI_IMAGE_FOURCC_NV16, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
     { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
       { 1, 1, 0, __DRI_IMAGE_FORMAT_GR88, 2 } } },

   /* For YUYV buffers, we set up two overlapping DRI images and treat
    * them as planar buffers in the compositors.  Plane 0 is GR88 and
    * samples YU or YV pairs and places Y into the R component, while
    * plane 1 is ARGB and samples YUYV clusters and places pairs and
    * places U into the G component and V into A.  This lets the
    * texture sampler interpolate the Y components correctly when
    * sampling from plane 0, and interpolate U and V correctly when
    * sampling from plane 1. */
   { __DRI_IMAGE_FOURCC_YUYV, __DRI_IMAGE_COMPONENTS_Y_XUXV, 2,
     { { 0, 0, 0, __DRI_IMAGE_FORMAT_GR88, 2 },
       { 0, 1, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } }
};

static __DRIimage *
intel_allocate_image(int dri_format, void *loaderPrivate)
{
    __DRIimage *image;

    image = calloc(1, sizeof *image);
    if (image == NULL)
	return NULL;

    image->dri_format = dri_format;
    image->offset = 0;

    image->format = driImageFormatToGLFormat(dri_format);
    if (image->format == 0) {
       free(image);
       return NULL;
    }

    image->internal_format = _mesa_get_format_base_format(image->format);
    image->data = loaderPrivate;

    return image;
}

/**
 * Sets up a DRIImage structure to point to our shared image in a region
 */
static void
intel_setup_image_from_mipmap_tree(struct intel_context *intel, __DRIimage *image,
                                   struct intel_mipmap_tree *mt, GLuint level,
                                   GLuint zoffset)
{
   unsigned int draw_x, draw_y;
   uint32_t mask_x, mask_y;

   intel_miptree_check_level_layer(mt, level, zoffset);

   intel_region_get_tile_masks(mt->region, &mask_x, &mask_y, false);
   intel_miptree_get_image_offset(mt, level, zoffset, &draw_x, &draw_y);

   image->width = mt->level[level].width;
   image->height = mt->level[level].height;
   image->tile_x = draw_x & mask_x;
   image->tile_y = draw_y & mask_y;

   image->offset = intel_region_get_aligned_offset(mt->region,
                                                   draw_x & ~mask_x,
                                                   draw_y & ~mask_y,
                                                   false);

   intel_region_reference(&image->region, mt->region);
}

static void
intel_setup_image_from_dimensions(__DRIimage *image)
{
   image->width    = image->region->width;
   image->height   = image->region->height;
   image->tile_x = 0;
   image->tile_y = 0;
}

static __DRIimage *
intel_create_image_from_name(__DRIscreen *screen,
			     int width, int height, int format,
			     int name, int pitch, void *loaderPrivate)
{
    struct intel_screen *intelScreen = screen->driverPrivate;
    __DRIimage *image;
    int cpp;

    image = intel_allocate_image(format, loaderPrivate);
    if (image == NULL)
       return NULL;

    if (image->format == MESA_FORMAT_NONE)
       cpp = 1;
    else
       cpp = _mesa_get_format_bytes(image->format);
    image->region = intel_region_alloc_for_handle(intelScreen,
						  cpp, width, height,
						  pitch * cpp, name, "image");
    if (image->region == NULL) {
       free(image);
       return NULL;
    }

    intel_setup_image_from_dimensions(image);

    return image;	
}

static __DRIimage *
intel_create_image_from_renderbuffer(__DRIcontext *context,
				     int renderbuffer, void *loaderPrivate)
{
   __DRIimage *image;
   struct intel_context *intel = context->driverPrivate;
   struct gl_renderbuffer *rb;
   struct intel_renderbuffer *irb;

   rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
   if (!rb) {
      _mesa_error(&intel->ctx,
		  GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
      return NULL;
   }

   irb = intel_renderbuffer(rb);
   image = calloc(1, sizeof *image);
   if (image == NULL)
      return NULL;

   image->internal_format = rb->InternalFormat;
   image->format = rb->Format;
   image->offset = 0;
   image->data = loaderPrivate;
   intel_region_reference(&image->region, irb->mt->region);
   intel_setup_image_from_dimensions(image);
   image->dri_format = driGLFormatToImageFormat(image->format);

   rb->NeedsFinishRenderTexture = true;
   return image;
}

static __DRIimage *
intel_create_image_from_texture(__DRIcontext *context, int target,
                                unsigned texture, int zoffset,
                                int level,
                                unsigned *error,
                                void *loaderPrivate)
{
   __DRIimage *image;
   struct intel_context *intel = context->driverPrivate;
   struct gl_texture_object *obj;
   struct intel_texture_object *iobj;
   GLuint face = 0;

   obj = _mesa_lookup_texture(&intel->ctx, texture);
   if (!obj || obj->Target != target) {
      *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
      return NULL;
   }

   if (target == GL_TEXTURE_CUBE_MAP)
      face = zoffset;

   _mesa_test_texobj_completeness(&intel->ctx, obj);
   iobj = intel_texture_object(obj);
   if (!obj->_BaseComplete || (level > 0 && !obj->_MipmapComplete)) {
      *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
      return NULL;
   }

   if (level < obj->BaseLevel || level > obj->_MaxLevel) {
      *error = __DRI_IMAGE_ERROR_BAD_MATCH;
      return NULL;
   }

   if (target == GL_TEXTURE_3D && obj->Image[face][level]->Depth < zoffset) {
      *error = __DRI_IMAGE_ERROR_BAD_MATCH;
      return NULL;
   }
   image = calloc(1, sizeof *image);
   if (image == NULL) {
      *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
      return NULL;
   }

   image->internal_format = obj->Image[face][level]->InternalFormat;
   image->format = obj->Image[face][level]->TexFormat;
   image->data = loaderPrivate;
   intel_setup_image_from_mipmap_tree(intel, image, iobj->mt, level, zoffset);
   image->dri_format = driGLFormatToImageFormat(image->format);
   if (image->dri_format == MESA_FORMAT_NONE) {
      *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
      free(image);
      return NULL;
   }

   *error = __DRI_IMAGE_ERROR_SUCCESS;
   return image;
}

static void
intel_destroy_image(__DRIimage *image)
{
    intel_region_release(&image->region);
    free(image);
}

static __DRIimage *
intel_create_image(__DRIscreen *screen,
		   int width, int height, int format,
		   unsigned int use,
		   void *loaderPrivate)
{
   __DRIimage *image;
   struct intel_screen *intelScreen = screen->driverPrivate;
   uint32_t tiling;
   int cpp;

   tiling = I915_TILING_X;
   if (use & __DRI_IMAGE_USE_CURSOR) {
      if (width != 64 || height != 64)
	 return NULL;
      tiling = I915_TILING_NONE;
   }

   if (use & __DRI_IMAGE_USE_LINEAR)
      tiling = I915_TILING_NONE;

   image = intel_allocate_image(format, loaderPrivate);
   if (image == NULL)
      return NULL;

   cpp = _mesa_get_format_bytes(image->format);
   image->region =
      intel_region_alloc(intelScreen, tiling, cpp, width, height, true);
   if (image->region == NULL) {
      free(image);
      return NULL;
   }
   
   intel_setup_image_from_dimensions(image);

   return image;
}

static GLboolean
intel_query_image(__DRIimage *image, int attrib, int *value)
{
   switch (attrib) {
   case __DRI_IMAGE_ATTRIB_STRIDE:
      *value = image->region->pitch;
      return true;
   case __DRI_IMAGE_ATTRIB_HANDLE:
      *value = image->region->bo->handle;
      return true;
   case __DRI_IMAGE_ATTRIB_NAME:
      return intel_region_flink(image->region, (uint32_t *) value);
   case __DRI_IMAGE_ATTRIB_FORMAT:
      *value = image->dri_format;
      return true;
   case __DRI_IMAGE_ATTRIB_WIDTH:
      *value = image->region->width;
      return true;
   case __DRI_IMAGE_ATTRIB_HEIGHT:
      *value = image->region->height;
      return true;
   case __DRI_IMAGE_ATTRIB_COMPONENTS:
      if (image->planar_format == NULL)
         return false;
      *value = image->planar_format->components;
      return true;
   case __DRI_IMAGE_ATTRIB_FD:
      if (drm_intel_bo_gem_export_to_prime(image->region->bo, value) == 0)
         return true;
      return false;
  default:
      return false;
   }
}

static __DRIimage *
intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
{
   __DRIimage *image;

   image = calloc(1, sizeof *image);
   if (image == NULL)
      return NULL;

   intel_region_reference(&image->region, orig_image->region);
   if (image->region == NULL) {
      free(image);
      return NULL;
   }

   image->internal_format = orig_image->internal_format;
   image->planar_format   = orig_image->planar_format;
   image->dri_format      = orig_image->dri_format;
   image->format          = orig_image->format;
   image->offset          = orig_image->offset;
   image->width           = orig_image->width;
   image->height          = orig_image->height;
   image->tile_x          = orig_image->tile_x;
   image->tile_y          = orig_image->tile_y;
   image->data            = loaderPrivate;

   memcpy(image->strides, orig_image->strides, sizeof(image->strides));
   memcpy(image->offsets, orig_image->offsets, sizeof(image->offsets));

   return image;
}

static GLboolean
intel_validate_usage(__DRIimage *image, unsigned int use)
{
   if (use & __DRI_IMAGE_USE_CURSOR) {
      if (image->region->width != 64 || image->region->height != 64)
	 return GL_FALSE;
   }

   return GL_TRUE;
}

static __DRIimage *
intel_create_image_from_names(__DRIscreen *screen,
                              int width, int height, int fourcc,
                              int *names, int num_names,
                              int *strides, int *offsets,
                              void *loaderPrivate)
{
    struct intel_image_format *f = NULL;
    __DRIimage *image;
    int i, index;

    if (screen == NULL || names == NULL || num_names != 1)
        return NULL;

    for (i = 0; i < ARRAY_SIZE(intel_image_formats); i++) {
        if (intel_image_formats[i].fourcc == fourcc) {
           f = &intel_image_formats[i];
        }
    }

    if (f == NULL)
        return NULL;

    image = intel_create_image_from_name(screen, width, height,
                                         __DRI_IMAGE_FORMAT_NONE,
                                         names[0], strides[0],
                                         loaderPrivate);

   if (image == NULL)
      return NULL;

    image->planar_format = f;
    for (i = 0; i < f->nplanes; i++) {
        index = f->planes[i].buffer_index;
        image->offsets[index] = offsets[index];
        image->strides[index] = strides[index];
    }

    return image;
}

static __DRIimage *
intel_create_image_from_fds(__DRIscreen *screen,
                            int width, int height, int fourcc,
                            int *fds, int num_fds, int *strides, int *offsets,
                            void *loaderPrivate)
{
   struct intel_screen *intelScreen = screen->driverPrivate;
   struct intel_image_format *f = NULL;
   __DRIimage *image;
   int i, index;

   if (fds == NULL || num_fds != 1)
      return NULL;

   for (i = 0; i < ARRAY_SIZE(intel_image_formats); i++) {
      if (intel_image_formats[i].fourcc == fourcc) {
         f = &intel_image_formats[i];
      }
   }

   if (f == NULL)
      return NULL;

   image = intel_allocate_image(__DRI_IMAGE_FORMAT_NONE, loaderPrivate);
   if (image == NULL)
      return NULL;

   image->region = intel_region_alloc_for_fd(intelScreen,
                                             f->planes[0].cpp, width, height, strides[0],
                                             height * strides[0], fds[0], "image");
   if (image->region == NULL) {
      free(image);
      return NULL;
   }

   image->planar_format = f;
   for (i = 0; i < f->nplanes; i++) {
      index = f->planes[i].buffer_index;
      image->offsets[index] = offsets[index];
      image->strides[index] = strides[index];
   }

   return image;
}


static __DRIimage *
intel_from_planar(__DRIimage *parent, int plane, void *loaderPrivate)
{
    int width, height, offset, stride, dri_format, index;
    struct intel_image_format *f;
    uint32_t mask_x, mask_y;
    __DRIimage *image;

    if (parent == NULL || parent->planar_format == NULL)
        return NULL;

    f = parent->planar_format;

    if (plane >= f->nplanes)
        return NULL;

    width = parent->region->width >> f->planes[plane].width_shift;
    height = parent->region->height >> f->planes[plane].height_shift;
    dri_format = f->planes[plane].dri_format;
    index = f->planes[plane].buffer_index;
    offset = parent->offsets[index];
    stride = parent->strides[index];

    image = intel_allocate_image(dri_format, loaderPrivate);
    if (image == NULL)
       return NULL;

    if (offset + height * stride > parent->region->bo->size) {
       _mesa_warning(NULL, "intel_create_sub_image: subimage out of bounds");
       free(image);
       return NULL;
    }

    image->region = calloc(sizeof(*image->region), 1);
    if (image->region == NULL) {
       free(image);
       return NULL;
    }

    image->region->cpp = _mesa_get_format_bytes(image->format);
    image->region->width = width;
    image->region->height = height;
    image->region->pitch = stride;
    image->region->refcount = 1;
    image->region->bo = parent->region->bo;
    drm_intel_bo_reference(image->region->bo);
    image->region->tiling = parent->region->tiling;
    image->offset = offset;
    intel_setup_image_from_dimensions(image);

    intel_region_get_tile_masks(image->region, &mask_x, &mask_y, false);
    if (offset & mask_x)
       _mesa_warning(NULL,
                     "intel_create_sub_image: offset not on tile boundary");

    return image;
}

static struct __DRIimageExtensionRec intelImageExtension = {
    .base = { __DRI_IMAGE, 7 },

    .createImageFromName                = intel_create_image_from_name,
    .createImageFromRenderbuffer        = intel_create_image_from_renderbuffer,
    .destroyImage                       = intel_destroy_image,
    .createImage                        = intel_create_image,
    .queryImage                         = intel_query_image,
    .dupImage                           = intel_dup_image,
    .validateUsage                      = intel_validate_usage,
    .createImageFromNames               = intel_create_image_from_names,
    .fromPlanar                         = intel_from_planar,
    .createImageFromTexture             = intel_create_image_from_texture,
    .createImageFromFds                 = intel_create_image_from_fds
};

static int
i915_query_renderer_integer(__DRIscreen *psp, int param, int *value)
{
   const struct intel_screen *const intelScreen =
      (struct intel_screen *) psp->driverPrivate;

   switch (param) {
   case __DRI2_RENDERER_VENDOR_ID:
      value[0] = 0x8086;
      return 0;
   case __DRI2_RENDERER_DEVICE_ID:
      value[0] = intelScreen->deviceID;
      return 0;
   case __DRI2_RENDERER_ACCELERATED:
      value[0] = 1;
      return 0;
   case __DRI2_RENDERER_VIDEO_MEMORY: {
      /* Once a batch uses more than 75% of the maximum mappable size, we
       * assume that there's some fragmentation, and we start doing extra
       * flushing, etc.  That's the big cliff apps will care about.
       */
      const unsigned long agp_bytes = drmAgpSize(psp->fd);
      const unsigned gpu_mappable_megabytes =
         (agp_bytes / (1024 * 1024)) * 3 / 4;

      const long system_memory_pages = sysconf(_SC_PHYS_PAGES);
      const long system_page_size = sysconf(_SC_PAGE_SIZE);

      if (system_memory_pages <= 0 || system_page_size <= 0)
         return -1;

      const uint64_t system_memory_bytes = (uint64_t) system_memory_pages
         * (uint64_t) system_page_size;

      const unsigned system_memory_megabytes =
         (unsigned) (system_memory_bytes / 1024);

      value[0] = MIN2(system_memory_megabytes, gpu_mappable_megabytes);
      return 0;
   }
   case __DRI2_RENDERER_UNIFIED_MEMORY_ARCHITECTURE:
      value[0] = 1;
      return 0;
   case __DRI2_RENDERER_PREFERRED_PROFILE:
      value[0] = (1U << __DRI_API_OPENGL);
      return 0;
   default:
      return driQueryRendererIntegerCommon(psp, param, value);
   }

   return -1;
}

static int
i915_query_renderer_string(__DRIscreen *psp, int param, const char **value)
{
   const struct intel_screen *intelScreen =
      (struct intel_screen *) psp->driverPrivate;

   switch (param) {
   case __DRI2_RENDERER_VENDOR_ID:
      value[0] = i915_vendor_string;
      return 0;
   case __DRI2_RENDERER_DEVICE_ID:
      value[0] = i915_get_renderer_string(intelScreen->deviceID);
      return 0;
   default:
      break;
   }

   return -1;
}

static struct __DRI2rendererQueryExtensionRec intelRendererQueryExtension = {
   .base = { __DRI2_RENDERER_QUERY, 1 },

   .queryInteger = i915_query_renderer_integer,
   .queryString = i915_query_renderer_string
};

static const __DRIextension *intelScreenExtensions[] = {
    &intelTexBufferExtension.base,
    &intelFlushExtension.base,
    &intelImageExtension.base,
    &dri2ConfigQueryExtension.base,
    NULL
};

static bool
intel_get_param(__DRIscreen *psp, int param, int *value)
{
   int ret;
   struct drm_i915_getparam gp;

   memset(&gp, 0, sizeof(gp));
   gp.param = param;
   gp.value = value;

   ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
   if (ret) {
      if (ret != -EINVAL)
	 _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
      return false;
   }

   return true;
}

static bool
intel_get_boolean(__DRIscreen *psp, int param)
{
   int value = 0;
   return intel_get_param(psp, param, &value) && value;
}

static void
intelDestroyScreen(__DRIscreen * sPriv)
{
   struct intel_screen *intelScreen = sPriv->driverPrivate;

   dri_bufmgr_destroy(intelScreen->bufmgr);
   driDestroyOptionInfo(&intelScreen->optionCache);

   free(intelScreen);
   sPriv->driverPrivate = NULL;
}


/**
 * This is called when we need to set up GL rendering to a new X window.
 */
static GLboolean
intelCreateBuffer(__DRIscreen * driScrnPriv,
                  __DRIdrawable * driDrawPriv,
                  const struct gl_config * mesaVis, GLboolean isPixmap)
{
   struct intel_renderbuffer *rb;
   gl_format rgbFormat;
   struct gl_framebuffer *fb;

   if (isPixmap)
      return false;

   fb = CALLOC_STRUCT(gl_framebuffer);
   if (!fb)
      return false;

   _mesa_initialize_window_framebuffer(fb, mesaVis);

   if (mesaVis->redBits == 5)
      rgbFormat = MESA_FORMAT_RGB565;
   else if (mesaVis->sRGBCapable)
      rgbFormat = MESA_FORMAT_SARGB8;
   else if (mesaVis->alphaBits == 0)
      rgbFormat = MESA_FORMAT_XRGB8888;
   else
      rgbFormat = MESA_FORMAT_ARGB8888;

   /* setup the hardware-based renderbuffers */
   rb = intel_create_renderbuffer(rgbFormat);
   _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base.Base);

   if (mesaVis->doubleBufferMode) {
      rb = intel_create_renderbuffer(rgbFormat);
      _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base.Base);
   }

   /*
    * Assert here that the gl_config has an expected depth/stencil bit
    * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
    * which constructs the advertised configs.)
    */
   if (mesaVis->depthBits == 24) {
      assert(mesaVis->stencilBits == 8);

      /*
       * Use combined depth/stencil. Note that the renderbuffer is
       * attached to two attachment points.
       */
      rb = intel_create_private_renderbuffer(MESA_FORMAT_S8_Z24);
      _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
      _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
   }
   else if (mesaVis->depthBits == 16) {
      assert(mesaVis->stencilBits == 0);
      rb = intel_create_private_renderbuffer(MESA_FORMAT_Z16);
      _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
   }
   else {
      assert(mesaVis->depthBits == 0);
      assert(mesaVis->stencilBits == 0);
   }

   /* now add any/all software-based renderbuffers we may need */
   _swrast_add_soft_renderbuffers(fb,
                                  false, /* never sw color */
                                  false, /* never sw depth */
                                  false, /* never sw stencil */
                                  mesaVis->accumRedBits > 0,
                                  false, /* never sw alpha */
                                  false  /* never sw aux */ );
   driDrawPriv->driverPrivate = fb;

   return true;
}

static void
intelDestroyBuffer(__DRIdrawable * driDrawPriv)
{
    struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
  
    _mesa_reference_framebuffer(&fb, NULL);
}

/* There are probably better ways to do this, such as an
 * init-designated function to register chipids and createcontext
 * functions.
 */
extern bool
i830CreateContext(int api,
                  const struct gl_config *mesaVis,
		  __DRIcontext *driContextPriv,
		  unsigned major_version,
		  unsigned minor_version,
		  unsigned *error,
		  void *sharedContextPrivate);

extern bool
i915CreateContext(int api,
		  const struct gl_config *mesaVis,
		  __DRIcontext *driContextPriv,
                  unsigned major_version,
                  unsigned minor_version,
                  unsigned *error,
		  void *sharedContextPrivate);

static GLboolean
intelCreateContext(gl_api api,
		   const struct gl_config * mesaVis,
                   __DRIcontext * driContextPriv,
		   unsigned major_version,
		   unsigned minor_version,
		   uint32_t flags,
                   bool notify_reset,
		   unsigned *error,
                   void *sharedContextPrivate)
{
   bool success = false;

   __DRIscreen *sPriv = driContextPriv->driScreenPriv;
   struct intel_screen *intelScreen = sPriv->driverPrivate;

   if (flags & ~__DRI_CTX_FLAG_DEBUG) {
      *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
      return false;
   }

   if (notify_reset) {
      *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
      return false;
   }

   if (IS_9XX(intelScreen->deviceID)) {
      success = i915CreateContext(api, mesaVis, driContextPriv,
                                  major_version, minor_version, error,
                                  sharedContextPrivate);
   } else {
      intelScreen->no_vbo = true;
      success = i830CreateContext(api, mesaVis, driContextPriv,
                                  major_version, minor_version, error,
                                  sharedContextPrivate);
   }

   if (success)
      return true;

   if (driContextPriv->driverPrivate != NULL)
      intelDestroyContext(driContextPriv);

   return false;
}

static bool
intel_init_bufmgr(struct intel_screen *intelScreen)
{
   __DRIscreen *spriv = intelScreen->driScrnPriv;

   intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;

   intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
   if (intelScreen->bufmgr == NULL) {
      fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
	      __func__, __LINE__);
      return false;
   }

   drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);

   if (!intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA)) {
      fprintf(stderr, "[%s: %u] Kernel 2.6.39 required.\n", __func__, __LINE__);
      return false;
   }

   return true;
}

static bool
intel_detect_swizzling(struct intel_screen *screen)
{
   drm_intel_bo *buffer;
   unsigned long flags = 0;
   unsigned long aligned_pitch;
   uint32_t tiling = I915_TILING_X;
   uint32_t swizzle_mode = 0;

   buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "swizzle test",
				     64, 64, 4,
				     &tiling, &aligned_pitch, flags);
   if (buffer == NULL)
      return false;

   drm_intel_bo_get_tiling(buffer, &tiling, &swizzle_mode);
   drm_intel_bo_unreference(buffer);

   if (swizzle_mode == I915_BIT_6_SWIZZLE_NONE)
      return false;
   else
      return true;
}

static __DRIconfig**
intel_screen_make_configs(__DRIscreen *dri_screen)
{
   static const gl_format formats[] = {
      MESA_FORMAT_RGB565,
      MESA_FORMAT_ARGB8888
   };

   /* GLX_SWAP_COPY_OML is not supported due to page flipping. */
   static const GLenum back_buffer_modes[] = {
       GLX_SWAP_UNDEFINED_OML, GLX_NONE,
   };

   static const uint8_t singlesample_samples[1] = {0};

   uint8_t depth_bits[4], stencil_bits[4];
   __DRIconfig **configs = NULL;

   /* Generate singlesample configs without accumulation buffer. */
   for (int i = 0; i < ARRAY_SIZE(formats); i++) {
      __DRIconfig **new_configs;
      int num_depth_stencil_bits = 2;

      /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
       * buffer that has a different number of bits per pixel than the color
       * buffer.
       */
      depth_bits[0] = 0;
      stencil_bits[0] = 0;

      if (formats[i] == MESA_FORMAT_RGB565) {
         depth_bits[1] = 16;
         stencil_bits[1] = 0;
      } else {
         depth_bits[1] = 24;
         stencil_bits[1] = 8;
      }

      new_configs = driCreateConfigs(formats[i],
                                     depth_bits,
                                     stencil_bits,
                                     num_depth_stencil_bits,
                                     back_buffer_modes, 2,
                                     singlesample_samples, 1,
                                     false);
      configs = driConcatConfigs(configs, new_configs);
   }

   /* Generate the minimum possible set of configs that include an
    * accumulation buffer.
    */
   for (int i = 0; i < ARRAY_SIZE(formats); i++) {
      __DRIconfig **new_configs;

      if (formats[i] == MESA_FORMAT_RGB565) {
         depth_bits[0] = 16;
         stencil_bits[0] = 0;
      } else {
         depth_bits[0] = 24;
         stencil_bits[0] = 8;
      }

      new_configs = driCreateConfigs(formats[i],
                                     depth_bits, stencil_bits, 1,
                                     back_buffer_modes, 1,
                                     singlesample_samples, 1,
                                     true);
      configs = driConcatConfigs(configs, new_configs);
   }

   if (configs == NULL) {
      fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
              __LINE__);
      return NULL;
   }

   return configs;
}

static void
set_max_gl_versions(struct intel_screen *screen)
{
   __DRIscreen *psp = screen->driScrnPriv;

   switch (screen->gen) {
   case 3:
      psp->max_gl_core_version = 0;
      psp->max_gl_es1_version = 11;
      psp->max_gl_compat_version = 21;
      psp->max_gl_es2_version = 20;
      break;
   case 2:
      psp->max_gl_core_version = 0;
      psp->max_gl_compat_version = 13;
      psp->max_gl_es1_version = 11;
      psp->max_gl_es2_version = 0;
      break;
   default:
      assert(!"unrecognized intel_screen::gen");
      break;
   }
}

/**
 * This is the driver specific part of the createNewScreen entry point.
 * Called when using DRI2.
 *
 * \return the struct gl_config supported by this driver
 */
static const
__DRIconfig **intelInitScreen2(__DRIscreen *psp)
{
   struct intel_screen *intelScreen;

   if (psp->dri2.loader->base.version <= 2 ||
       psp->dri2.loader->getBuffersWithFormat == NULL) {
      fprintf(stderr,
	      "\nERROR!  DRI2 loader with getBuffersWithFormat() "
	      "support required\n");
      return false;
   }

   /* Allocate the private area */
   intelScreen = calloc(1, sizeof *intelScreen);
   if (!intelScreen) {
      fprintf(stderr, "\nERROR!  Allocating private area failed\n");
      return false;
   }
   /* parse information in __driConfigOptions */
   driParseOptionInfo(&intelScreen->optionCache, i915_config_options.xml);

   intelScreen->driScrnPriv = psp;
   psp->driverPrivate = (void *) intelScreen;

   if (!intel_init_bufmgr(intelScreen))
       return false;

   intelScreen->deviceID = drm_intel_bufmgr_gem_get_devid(intelScreen->bufmgr);

   if (IS_9XX(intelScreen->deviceID)) {
      intelScreen->gen = 3;
   } else {
      intelScreen->gen = 2;
   }

   intelScreen->hw_has_swizzling = intel_detect_swizzling(intelScreen);

   set_max_gl_versions(intelScreen);

   psp->extensions = intelScreenExtensions;

   return (const __DRIconfig**) intel_screen_make_configs(psp);
}

struct intel_buffer {
   __DRIbuffer base;
   struct intel_region *region;
};

static __DRIbuffer *
intelAllocateBuffer(__DRIscreen *screen,
		    unsigned attachment, unsigned format,
		    int width, int height)
{
   struct intel_buffer *intelBuffer;
   struct intel_screen *intelScreen = screen->driverPrivate;

   assert(attachment == __DRI_BUFFER_FRONT_LEFT ||
          attachment == __DRI_BUFFER_BACK_LEFT);

   intelBuffer = calloc(1, sizeof *intelBuffer);
   if (intelBuffer == NULL)
      return NULL;

   /* The front and back buffers are color buffers, which are X tiled. */
   intelBuffer->region = intel_region_alloc(intelScreen,
                                            I915_TILING_X,
                                            format / 8,
                                            width,
                                            height,
                                            true);
   
   if (intelBuffer->region == NULL) {
	   free(intelBuffer);
	   return NULL;
   }
   
   intel_region_flink(intelBuffer->region, &intelBuffer->base.name);

   intelBuffer->base.attachment = attachment;
   intelBuffer->base.cpp = intelBuffer->region->cpp;
   intelBuffer->base.pitch = intelBuffer->region->pitch;

   return &intelBuffer->base;
}

static void
intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
{
   struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;

   intel_region_release(&intelBuffer->region);
   free(intelBuffer);
}


static const struct __DriverAPIRec i915_driver_api = {
   .InitScreen		 = intelInitScreen2,
   .DestroyScreen	 = intelDestroyScreen,
   .CreateContext	 = intelCreateContext,
   .DestroyContext	 = intelDestroyContext,
   .CreateBuffer	 = intelCreateBuffer,
   .DestroyBuffer	 = intelDestroyBuffer,
   .MakeCurrent		 = intelMakeCurrent,
   .UnbindContext	 = intelUnbindContext,
   .AllocateBuffer       = intelAllocateBuffer,
   .ReleaseBuffer        = intelReleaseBuffer
};

static const struct __DRIDriverVtableExtensionRec i915_vtable = {
   .base = { __DRI_DRIVER_VTABLE, 1 },
   .vtable = &i915_driver_api,
};

/* This is the table of extensions that the loader will dlsym() for. */
static const __DRIextension *i915_driver_extensions[] = {
    &driCoreExtension.base,
    &driDRI2Extension.base,
    &i915_vtable.base,
    &i915_config_options.base,
    NULL
};

PUBLIC const __DRIextension **__driDriverGetExtensions_i915(void)
{
   globalDriverAPI = &i915_driver_api;

   return i915_driver_extensions;
}