intel_screen.c revision e2f2376e884225705e2369caee4a8c4e90e938f3 
1/**************************************************************************
2 *
3 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28#include <errno.h>
29#include "main/glheader.h"
30#include "main/context.h"
31#include "main/framebuffer.h"
32#include "main/renderbuffer.h"
33#include "main/hash.h"
34#include "main/fbobject.h"
35#include "main/mfeatures.h"
36#include "main/version.h"
37#include "swrast/s_renderbuffer.h"
38
39#include "utils.h"
40#include "xmlpool.h"
41
42PUBLIC const char __driConfigOptions[] =
43   DRI_CONF_BEGIN
44   DRI_CONF_SECTION_PERFORMANCE
45      DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
46      /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
47       * DRI_CONF_BO_REUSE_ALL
48       */
49      DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
50	 DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
51	    DRI_CONF_ENUM(0, "Disable buffer object reuse")
52	    DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
53	 DRI_CONF_DESC_END
54      DRI_CONF_OPT_END
55
56      DRI_CONF_OPT_BEGIN(texture_tiling, bool, true)
57	 DRI_CONF_DESC(en, "Enable texture tiling")
58      DRI_CONF_OPT_END
59
60      DRI_CONF_OPT_BEGIN(hiz, bool, true)
61	 DRI_CONF_DESC(en, "Enable Hierarchical Z on gen6+")
62      DRI_CONF_OPT_END
63
64      DRI_CONF_OPT_BEGIN(early_z, bool, false)
65	 DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
66      DRI_CONF_OPT_END
67
68      DRI_CONF_OPT_BEGIN(fragment_shader, bool, true)
69	 DRI_CONF_DESC(en, "Enable limited ARB_fragment_shader support on 915/945.")
70      DRI_CONF_OPT_END
71
72   DRI_CONF_SECTION_END
73   DRI_CONF_SECTION_QUALITY
74      DRI_CONF_FORCE_S3TC_ENABLE(false)
75      DRI_CONF_ALLOW_LARGE_TEXTURES(2)
76   DRI_CONF_SECTION_END
77   DRI_CONF_SECTION_DEBUG
78     DRI_CONF_NO_RAST(false)
79     DRI_CONF_ALWAYS_FLUSH_BATCH(false)
80     DRI_CONF_ALWAYS_FLUSH_CACHE(false)
81     DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN(false)
82     DRI_CONF_DISABLE_BLEND_FUNC_EXTENDED(false)
83
84      DRI_CONF_OPT_BEGIN(stub_occlusion_query, bool, false)
85	 DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
86      DRI_CONF_OPT_END
87
88      DRI_CONF_OPT_BEGIN(shader_precompile, bool, false)
89	 DRI_CONF_DESC(en, "Perform code generation at shader link time.")
90      DRI_CONF_OPT_END
91   DRI_CONF_SECTION_END
92DRI_CONF_END;
93
94const GLuint __driNConfigOptions = 15;
95
96#include "intel_batchbuffer.h"
97#include "intel_buffers.h"
98#include "intel_bufmgr.h"
99#include "intel_chipset.h"
100#include "intel_fbo.h"
101#include "intel_mipmap_tree.h"
102#include "intel_screen.h"
103#include "intel_tex.h"
104#include "intel_regions.h"
105
106#include "i915_drm.h"
107
108#ifdef USE_NEW_INTERFACE
109static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
110#endif /*USE_NEW_INTERFACE */
111
112void
113aub_dump_bmp(struct gl_context *ctx)
114{
115   struct gl_framebuffer *fb = ctx->DrawBuffer;
116
117   for (int i = 0; i < fb->_NumColorDrawBuffers; i++) {
118      struct intel_renderbuffer *irb =
119	 intel_renderbuffer(fb->_ColorDrawBuffers[i]);
120
121      if (irb && irb->mt) {
122	 enum aub_dump_bmp_format format;
123
124	 switch (irb->Base.Base.Format) {
125	 case MESA_FORMAT_ARGB8888:
126	 case MESA_FORMAT_XRGB8888:
127	    format = AUB_DUMP_BMP_FORMAT_ARGB_8888;
128	    break;
129	 default:
130	    continue;
131	 }
132
133	 drm_intel_gem_bo_aub_dump_bmp(irb->mt->region->bo,
134				       irb->draw_x,
135				       irb->draw_y,
136				       irb->Base.Base.Width,
137				       irb->Base.Base.Height,
138				       format,
139				       irb->mt->region->pitch *
140				       irb->mt->region->cpp,
141				       0);
142      }
143   }
144}
145
146static const __DRItexBufferExtension intelTexBufferExtension = {
147    { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
148   intelSetTexBuffer,
149   intelSetTexBuffer2,
150};
151
152static void
153intelDRI2Flush(__DRIdrawable *drawable)
154{
155   GET_CURRENT_CONTEXT(ctx);
156   struct intel_context *intel = intel_context(ctx);
157   if (intel == NULL)
158      return;
159
160   if (intel->gen < 4)
161      INTEL_FIREVERTICES(intel);
162
163   intel->need_throttle = true;
164
165   if (intel->batch.used)
166      intel_batchbuffer_flush(intel);
167
168   if (INTEL_DEBUG & DEBUG_AUB) {
169      aub_dump_bmp(ctx);
170   }
171}
172
173static const struct __DRI2flushExtensionRec intelFlushExtension = {
174    { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
175    intelDRI2Flush,
176    dri2InvalidateDrawable,
177};
178
179static __DRIimage *
180intel_allocate_image(int dri_format, void *loaderPrivate)
181{
182    __DRIimage *image;
183
184    image = CALLOC(sizeof *image);
185    if (image == NULL)
186	return NULL;
187
188    image->dri_format = dri_format;
189    image->offset = 0;
190
191    switch (dri_format) {
192    case __DRI_IMAGE_FORMAT_RGB565:
193       image->format = MESA_FORMAT_RGB565;
194       break;
195    case __DRI_IMAGE_FORMAT_XRGB8888:
196       image->format = MESA_FORMAT_XRGB8888;
197       break;
198    case __DRI_IMAGE_FORMAT_ARGB8888:
199       image->format = MESA_FORMAT_ARGB8888;
200       break;
201    case __DRI_IMAGE_FORMAT_ABGR8888:
202       image->format = MESA_FORMAT_RGBA8888_REV;
203       break;
204    case __DRI_IMAGE_FORMAT_XBGR8888:
205       image->format = MESA_FORMAT_RGBX8888_REV;
206       break;
207    case __DRI_IMAGE_FORMAT_R8:
208       image->format = MESA_FORMAT_R8;
209       break;
210    case __DRI_IMAGE_FORMAT_GR88:
211       image->format = MESA_FORMAT_GR88;
212       break;
213    case __DRI_IMAGE_FORMAT_NONE:
214       image->format = MESA_FORMAT_NONE;
215       break;
216    default:
217       free(image);
218       return NULL;
219    }
220
221    image->internal_format = _mesa_get_format_base_format(image->format);
222    image->data = loaderPrivate;
223
224    return image;
225}
226
227static __DRIimage *
228intel_create_image_from_name(__DRIscreen *screen,
229			     int width, int height, int format,
230			     int name, int pitch, void *loaderPrivate)
231{
232    struct intel_screen *intelScreen = screen->driverPrivate;
233    __DRIimage *image;
234    int cpp;
235
236    image = intel_allocate_image(format, loaderPrivate);
237    if (image->format == MESA_FORMAT_NONE)
238       cpp = 0;
239    else
240       cpp = _mesa_get_format_bytes(image->format);
241    image->region = intel_region_alloc_for_handle(intelScreen,
242						  cpp, width, height,
243						  pitch, name, "image");
244    if (image->region == NULL) {
245       FREE(image);
246       return NULL;
247    }
248
249    return image;
250}
251
252static __DRIimage *
253intel_create_image_from_renderbuffer(__DRIcontext *context,
254				     int renderbuffer, void *loaderPrivate)
255{
256   __DRIimage *image;
257   struct intel_context *intel = context->driverPrivate;
258   struct gl_renderbuffer *rb;
259   struct intel_renderbuffer *irb;
260
261   rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
262   if (!rb) {
263      _mesa_error(&intel->ctx,
264		  GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
265      return NULL;
266   }
267
268   irb = intel_renderbuffer(rb);
269   image = CALLOC(sizeof *image);
270   if (image == NULL)
271      return NULL;
272
273   image->internal_format = rb->InternalFormat;
274   image->format = rb->Format;
275   image->offset = 0;
276   image->data = loaderPrivate;
277   intel_region_reference(&image->region, irb->mt->region);
278
279   switch (image->format) {
280   case MESA_FORMAT_RGB565:
281      image->dri_format = __DRI_IMAGE_FORMAT_RGB565;
282      break;
283   case MESA_FORMAT_XRGB8888:
284      image->dri_format = __DRI_IMAGE_FORMAT_XRGB8888;
285      break;
286   case MESA_FORMAT_ARGB8888:
287      image->dri_format = __DRI_IMAGE_FORMAT_ARGB8888;
288      break;
289   case MESA_FORMAT_RGBA8888_REV:
290      image->dri_format = __DRI_IMAGE_FORMAT_ABGR8888;
291      break;
292   case MESA_FORMAT_R8:
293      image->dri_format = __DRI_IMAGE_FORMAT_R8;
294      break;
295   case MESA_FORMAT_RG88:
296      image->dri_format = __DRI_IMAGE_FORMAT_GR88;
297      break;
298   }
299
300   return image;
301}
302
303static void
304intel_destroy_image(__DRIimage *image)
305{
306    intel_region_release(&image->region);
307    FREE(image);
308}
309
310static __DRIimage *
311intel_create_image(__DRIscreen *screen,
312		   int width, int height, int format,
313		   unsigned int use,
314		   void *loaderPrivate)
315{
316   __DRIimage *image;
317   struct intel_screen *intelScreen = screen->driverPrivate;
318   uint32_t tiling;
319   int cpp;
320
321   tiling = I915_TILING_X;
322   if (use & __DRI_IMAGE_USE_CURSOR) {
323      if (width != 64 || height != 64)
324	 return NULL;
325      tiling = I915_TILING_NONE;
326   }
327
328   /* We only support write for cursor drm images */
329   if ((use & __DRI_IMAGE_USE_WRITE) &&
330       use != (__DRI_IMAGE_USE_WRITE | __DRI_IMAGE_USE_CURSOR))
331      return NULL;
332
333   image = intel_allocate_image(format, loaderPrivate);
334   image->usage = use;
335   cpp = _mesa_get_format_bytes(image->format);
336   image->region =
337      intel_region_alloc(intelScreen, tiling, cpp, width, height, true);
338   if (image->region == NULL) {
339      FREE(image);
340      return NULL;
341   }
342
343   return image;
344}
345
346static GLboolean
347intel_query_image(__DRIimage *image, int attrib, int *value)
348{
349   switch (attrib) {
350   case __DRI_IMAGE_ATTRIB_STRIDE:
351      *value = image->region->pitch * image->region->cpp;
352      return true;
353   case __DRI_IMAGE_ATTRIB_HANDLE:
354      *value = image->region->bo->handle;
355      return true;
356   case __DRI_IMAGE_ATTRIB_NAME:
357      return intel_region_flink(image->region, (uint32_t *) value);
358   case __DRI_IMAGE_ATTRIB_FORMAT:
359      *value = image->dri_format;
360      return true;
361   case __DRI_IMAGE_ATTRIB_WIDTH:
362      *value = image->region->width;
363      return true;
364   case __DRI_IMAGE_ATTRIB_HEIGHT:
365      *value = image->region->height;
366      return true;
367  default:
368      return false;
369   }
370}
371
372static __DRIimage *
373intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
374{
375   __DRIimage *image;
376
377   image = CALLOC(sizeof *image);
378   if (image == NULL)
379      return NULL;
380
381   intel_region_reference(&image->region, orig_image->region);
382   if (image->region == NULL) {
383      FREE(image);
384      return NULL;
385   }
386
387   image->internal_format = orig_image->internal_format;
388   image->usage           = orig_image->usage;
389   image->dri_format      = orig_image->dri_format;
390   image->format          = orig_image->format;
391   image->offset          = orig_image->offset;
392   image->data            = loaderPrivate;
393
394   return image;
395}
396
397static GLboolean
398intel_validate_usage(__DRIimage *image, unsigned int use)
399{
400   if (use & __DRI_IMAGE_USE_CURSOR) {
401      if (image->region->width != 64 || image->region->height != 64)
402	 return GL_FALSE;
403   }
404
405   /* We only support write for cursor drm images */
406   if ((use & __DRI_IMAGE_USE_WRITE) &&
407       use != (__DRI_IMAGE_USE_WRITE | __DRI_IMAGE_USE_CURSOR))
408      return GL_FALSE;
409
410   return GL_TRUE;
411}
412
413static int
414intel_image_write(__DRIimage *image, const void *buf, size_t count)
415{
416   if (image->region->map_refcount)
417      return -1;
418   if (!(image->usage & __DRI_IMAGE_USE_WRITE))
419      return -1;
420
421   drm_intel_bo_map(image->region->bo, true);
422   memcpy(image->region->bo->virtual, buf, count);
423   drm_intel_bo_unmap(image->region->bo);
424
425   return 0;
426}
427
428static __DRIimage *
429intel_create_sub_image(__DRIimage *parent,
430                       int width, int height, int dri_format,
431                       int offset, int pitch, void *loaderPrivate)
432{
433    __DRIimage *image;
434    int cpp;
435    uint32_t mask_x, mask_y;
436
437    image = intel_allocate_image(dri_format, loaderPrivate);
438    cpp = _mesa_get_format_bytes(image->format);
439    if (offset + height * cpp * pitch > parent->region->bo->size) {
440       _mesa_warning(NULL, "intel_create_sub_image: subimage out of bounds");
441       FREE(image);
442       return NULL;
443    }
444
445    image->region = calloc(sizeof(*image->region), 1);
446    if (image->region == NULL) {
447       FREE(image);
448       return NULL;
449    }
450
451    image->region->cpp = _mesa_get_format_bytes(image->format);
452    image->region->width = width;
453    image->region->height = height;
454    image->region->pitch = pitch;
455    image->region->refcount = 1;
456    image->region->bo = parent->region->bo;
457    drm_intel_bo_reference(image->region->bo);
458    image->region->tiling = parent->region->tiling;
459    image->region->screen = parent->region->screen;
460    image->offset = offset;
461
462    intel_region_get_tile_masks(image->region, &mask_x, &mask_y);
463    if (offset & mask_x)
464       _mesa_warning(NULL,
465                     "intel_create_sub_image: offset not on tile boundary");
466
467    return image;
468}
469
470static struct __DRIimageExtensionRec intelImageExtension = {
471    { __DRI_IMAGE, 5 },
472    intel_create_image_from_name,
473    intel_create_image_from_renderbuffer,
474    intel_destroy_image,
475    intel_create_image,
476    intel_query_image,
477    intel_dup_image,
478    intel_validate_usage,
479    intel_image_write,
480    intel_create_sub_image
481};
482
483static const __DRIextension *intelScreenExtensions[] = {
484    &intelTexBufferExtension.base,
485    &intelFlushExtension.base,
486    &intelImageExtension.base,
487    &dri2ConfigQueryExtension.base,
488    NULL
489};
490
491static bool
492intel_get_param(__DRIscreen *psp, int param, int *value)
493{
494   int ret;
495   struct drm_i915_getparam gp;
496
497   memset(&gp, 0, sizeof(gp));
498   gp.param = param;
499   gp.value = value;
500
501   ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
502   if (ret) {
503      if (ret != -EINVAL)
504	 _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
505      return false;
506   }
507
508   return true;
509}
510
511static bool
512intel_get_boolean(__DRIscreen *psp, int param)
513{
514   int value = 0;
515   return intel_get_param(psp, param, &value) && value;
516}
517
518static void
519nop_callback(GLuint key, void *data, void *userData)
520{
521}
522
523static void
524intelDestroyScreen(__DRIscreen * sPriv)
525{
526   struct intel_screen *intelScreen = sPriv->driverPrivate;
527
528   dri_bufmgr_destroy(intelScreen->bufmgr);
529   driDestroyOptionInfo(&intelScreen->optionCache);
530
531   /* Some regions may still have references to them at this point, so
532    * flush the hash table to prevent _mesa_DeleteHashTable() from
533    * complaining about the hash not being empty; */
534   _mesa_HashDeleteAll(intelScreen->named_regions, nop_callback, NULL);
535   _mesa_DeleteHashTable(intelScreen->named_regions);
536
537   FREE(intelScreen);
538   sPriv->driverPrivate = NULL;
539}
540
541
542/**
543 * This is called when we need to set up GL rendering to a new X window.
544 */
545static GLboolean
546intelCreateBuffer(__DRIscreen * driScrnPriv,
547                  __DRIdrawable * driDrawPriv,
548                  const struct gl_config * mesaVis, GLboolean isPixmap)
549{
550   struct intel_renderbuffer *rb;
551   struct intel_screen *screen = (struct intel_screen*) driScrnPriv->driverPrivate;
552   gl_format rgbFormat;
553   unsigned num_samples = intel_quantize_num_samples(screen, mesaVis->samples);
554   struct gl_framebuffer *fb;
555
556   if (isPixmap)
557      return false;
558
559   fb = CALLOC_STRUCT(gl_framebuffer);
560   if (!fb)
561      return false;
562
563   _mesa_initialize_window_framebuffer(fb, mesaVis);
564
565   if (mesaVis->redBits == 5)
566      rgbFormat = MESA_FORMAT_RGB565;
567   else if (mesaVis->alphaBits == 0)
568      rgbFormat = MESA_FORMAT_XRGB8888;
569   else
570      rgbFormat = MESA_FORMAT_ARGB8888;
571
572   /* setup the hardware-based renderbuffers */
573   rb = intel_create_renderbuffer(rgbFormat, num_samples);
574   _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base.Base);
575
576   if (mesaVis->doubleBufferMode) {
577      rb = intel_create_renderbuffer(rgbFormat, num_samples);
578      _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base.Base);
579   }
580
581   /*
582    * Assert here that the gl_config has an expected depth/stencil bit
583    * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
584    * which constructs the advertised configs.)
585    */
586   if (mesaVis->depthBits == 24) {
587      assert(mesaVis->stencilBits == 8);
588
589      if (screen->hw_has_separate_stencil) {
590         rb = intel_create_private_renderbuffer(MESA_FORMAT_X8_Z24,
591                                                num_samples);
592         _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
593         rb = intel_create_private_renderbuffer(MESA_FORMAT_S8,
594                                                num_samples);
595         _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
596      } else {
597         /*
598          * Use combined depth/stencil. Note that the renderbuffer is
599          * attached to two attachment points.
600          */
601         rb = intel_create_private_renderbuffer(MESA_FORMAT_S8_Z24,
602                                                num_samples);
603         _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
604         _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
605      }
606   }
607   else if (mesaVis->depthBits == 16) {
608      assert(mesaVis->stencilBits == 0);
609      rb = intel_create_private_renderbuffer(MESA_FORMAT_Z16,
610                                             num_samples);
611      _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
612   }
613   else {
614      assert(mesaVis->depthBits == 0);
615      assert(mesaVis->stencilBits == 0);
616   }
617
618   /* now add any/all software-based renderbuffers we may need */
619   _swrast_add_soft_renderbuffers(fb,
620                                  false, /* never sw color */
621                                  false, /* never sw depth */
622                                  false, /* never sw stencil */
623                                  mesaVis->accumRedBits > 0,
624                                  false, /* never sw alpha */
625                                  false  /* never sw aux */ );
626   driDrawPriv->driverPrivate = fb;
627
628   return true;
629}
630
631static void
632intelDestroyBuffer(__DRIdrawable * driDrawPriv)
633{
634    struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
635
636    _mesa_reference_framebuffer(&fb, NULL);
637}
638
639/* There are probably better ways to do this, such as an
640 * init-designated function to register chipids and createcontext
641 * functions.
642 */
643extern bool
644i830CreateContext(const struct gl_config *mesaVis,
645		  __DRIcontext *driContextPriv,
646		  void *sharedContextPrivate);
647
648extern bool
649i915CreateContext(int api,
650		  const struct gl_config *mesaVis,
651		  __DRIcontext *driContextPriv,
652		  void *sharedContextPrivate);
653extern bool
654brwCreateContext(int api,
655	         const struct gl_config *mesaVis,
656	         __DRIcontext *driContextPriv,
657		 void *sharedContextPrivate);
658
659static GLboolean
660intelCreateContext(gl_api api,
661		   const struct gl_config * mesaVis,
662                   __DRIcontext * driContextPriv,
663		   unsigned major_version,
664		   unsigned minor_version,
665		   uint32_t flags,
666		   unsigned *error,
667                   void *sharedContextPrivate)
668{
669   __DRIscreen *sPriv = driContextPriv->driScreenPriv;
670   struct intel_screen *intelScreen = sPriv->driverPrivate;
671   bool success = false;
672
673#ifdef I915
674   if (IS_9XX(intelScreen->deviceID)) {
675      if (!IS_965(intelScreen->deviceID)) {
676	 success = i915CreateContext(api, mesaVis, driContextPriv,
677				     sharedContextPrivate);
678      }
679   } else {
680      intelScreen->no_vbo = true;
681      success = i830CreateContext(mesaVis, driContextPriv,
682				  sharedContextPrivate);
683   }
684#else
685   if (IS_965(intelScreen->deviceID))
686      success = brwCreateContext(api, mesaVis,
687			      driContextPriv,
688			      sharedContextPrivate);
689#endif
690
691   if (success) {
692      struct gl_context *ctx =
693	 (struct gl_context *) driContextPriv->driverPrivate;
694
695      _mesa_compute_version(ctx);
696      if (ctx->VersionMajor > major_version
697	  || (ctx->VersionMajor == major_version
698	      && ctx->VersionMinor >= minor_version)) {
699	 return true;
700      }
701
702      *error = __DRI_CTX_ERROR_BAD_VERSION;
703      intelDestroyContext(driContextPriv);
704   } else {
705      *error = __DRI_CTX_ERROR_NO_MEMORY;
706      fprintf(stderr, "Unrecognized deviceID 0x%x\n", intelScreen->deviceID);
707   }
708
709   return false;
710}
711
712static bool
713intel_init_bufmgr(struct intel_screen *intelScreen)
714{
715   __DRIscreen *spriv = intelScreen->driScrnPriv;
716   int num_fences = 0;
717
718   intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
719
720   intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
721   if (intelScreen->bufmgr == NULL) {
722      fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
723	      __func__, __LINE__);
724      return false;
725   }
726
727   if (!intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences) ||
728       num_fences == 0) {
729      fprintf(stderr, "[%s: %u] Kernel 2.6.29 required.\n", __func__, __LINE__);
730      return false;
731   }
732
733   drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
734
735   intelScreen->named_regions = _mesa_NewHashTable();
736
737   intelScreen->relaxed_relocations = 0;
738   intelScreen->relaxed_relocations |=
739      intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA) << 0;
740
741   return true;
742}
743
744/**
745 * Override intel_screen.hw_has_separate_stencil with environment variable
746 * INTEL_SEPARATE_STENCIL.
747 *
748 * Valid values for INTEL_SEPARATE_STENCIL are "0" and "1". If an invalid
749 * valid value is encountered, a warning is emitted and INTEL_SEPARATE_STENCIL
750 * is ignored.
751 */
752static void
753intel_override_separate_stencil(struct intel_screen *screen)
754{
755   const char *s = getenv("INTEL_SEPARATE_STENCIL");
756   if (!s) {
757      return;
758   } else if (!strncmp("0", s, 2)) {
759      screen->hw_has_separate_stencil = false;
760   } else if (!strncmp("1", s, 2)) {
761      screen->hw_has_separate_stencil = true;
762   } else {
763      fprintf(stderr,
764	      "warning: env variable INTEL_SEPARATE_STENCIL=\"%s\" has "
765	      "invalid value and is ignored", s);
766   }
767}
768
769static bool
770intel_detect_swizzling(struct intel_screen *screen)
771{
772   drm_intel_bo *buffer;
773   unsigned long flags = 0;
774   unsigned long aligned_pitch;
775   uint32_t tiling = I915_TILING_X;
776   uint32_t swizzle_mode = 0;
777
778   buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "swizzle test",
779				     64, 64, 4,
780				     &tiling, &aligned_pitch, flags);
781   if (buffer == NULL)
782      return false;
783
784   drm_intel_bo_get_tiling(buffer, &tiling, &swizzle_mode);
785   drm_intel_bo_unreference(buffer);
786
787   if (swizzle_mode == I915_BIT_6_SWIZZLE_NONE)
788      return false;
789   else
790      return true;
791}
792
793/**
794 * This is the driver specific part of the createNewScreen entry point.
795 * Called when using DRI2.
796 *
797 * \return the struct gl_config supported by this driver
798 */
799static const
800__DRIconfig **intelInitScreen2(__DRIscreen *psp)
801{
802   struct intel_screen *intelScreen;
803   GLenum fb_format[3];
804   GLenum fb_type[3];
805   unsigned int api_mask;
806
807   static const GLenum back_buffer_modes[] = {
808       GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
809   };
810   uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
811   int color;
812   __DRIconfig **configs = NULL;
813
814   if (psp->dri2.loader->base.version <= 2 ||
815       psp->dri2.loader->getBuffersWithFormat == NULL) {
816      fprintf(stderr,
817	      "\nERROR!  DRI2 loader with getBuffersWithFormat() "
818	      "support required\n");
819      return false;
820   }
821
822   /* Allocate the private area */
823   intelScreen = CALLOC(sizeof *intelScreen);
824   if (!intelScreen) {
825      fprintf(stderr, "\nERROR!  Allocating private area failed\n");
826      return false;
827   }
828   /* parse information in __driConfigOptions */
829   driParseOptionInfo(&intelScreen->optionCache,
830                      __driConfigOptions, __driNConfigOptions);
831
832   intelScreen->driScrnPriv = psp;
833   psp->driverPrivate = (void *) intelScreen;
834
835   if (!intel_init_bufmgr(intelScreen))
836       return false;
837
838   intelScreen->deviceID = drm_intel_bufmgr_gem_get_devid(intelScreen->bufmgr);
839
840   intelScreen->kernel_has_gen7_sol_reset =
841      intel_get_boolean(intelScreen->driScrnPriv,
842			I915_PARAM_HAS_GEN7_SOL_RESET);
843
844   if (IS_GEN7(intelScreen->deviceID)) {
845      intelScreen->gen = 7;
846   } else if (IS_GEN6(intelScreen->deviceID)) {
847      intelScreen->gen = 6;
848   } else if (IS_GEN5(intelScreen->deviceID)) {
849      intelScreen->gen = 5;
850   } else if (IS_965(intelScreen->deviceID)) {
851      intelScreen->gen = 4;
852   } else if (IS_9XX(intelScreen->deviceID)) {
853      intelScreen->gen = 3;
854   } else {
855      intelScreen->gen = 2;
856   }
857
858   intelScreen->hw_has_separate_stencil = intelScreen->gen >= 6;
859   intelScreen->hw_must_use_separate_stencil = intelScreen->gen >= 7;
860
861   int has_llc = 0;
862   bool success = intel_get_param(intelScreen->driScrnPriv, I915_PARAM_HAS_LLC,
863				  &has_llc);
864   if (success && has_llc)
865      intelScreen->hw_has_llc = true;
866   else if (!success && intelScreen->gen >= 6)
867      intelScreen->hw_has_llc = true;
868
869   intel_override_separate_stencil(intelScreen);
870
871   api_mask = (1 << __DRI_API_OPENGL);
872#if FEATURE_ES1
873   api_mask |= (1 << __DRI_API_GLES);
874#endif
875#if FEATURE_ES2
876   api_mask |= (1 << __DRI_API_GLES2);
877#endif
878
879   if (IS_9XX(intelScreen->deviceID) || IS_965(intelScreen->deviceID))
880      psp->api_mask = api_mask;
881
882   intelScreen->hw_has_swizzling = intel_detect_swizzling(intelScreen);
883
884   psp->extensions = intelScreenExtensions;
885
886   msaa_samples_array[0] = 0;
887
888   fb_format[0] = GL_RGB;
889   fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
890
891   fb_format[1] = GL_BGR;
892   fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
893
894   fb_format[2] = GL_BGRA;
895   fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
896
897   depth_bits[0] = 0;
898   stencil_bits[0] = 0;
899
900   /* Generate a rich set of useful configs that do not include an
901    * accumulation buffer.
902    */
903   for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
904      __DRIconfig **new_configs;
905      int depth_factor;
906
907      /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
908       * buffer that has a diffferent number of bits per pixel than the color
909       * buffer.  This isn't yet supported here.
910       */
911      if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
912	 depth_bits[1] = 16;
913	 stencil_bits[1] = 0;
914      } else {
915	 depth_bits[1] = 24;
916	 stencil_bits[1] = 8;
917      }
918
919      depth_factor = 2;
920
921      new_configs = driCreateConfigs(fb_format[color], fb_type[color],
922				     depth_bits,
923				     stencil_bits,
924				     depth_factor,
925				     back_buffer_modes,
926				     ARRAY_SIZE(back_buffer_modes),
927				     msaa_samples_array,
928				     ARRAY_SIZE(msaa_samples_array),
929				     false);
930      if (configs == NULL)
931	 configs = new_configs;
932      else
933	 configs = driConcatConfigs(configs, new_configs);
934   }
935
936   /* Generate the minimum possible set of configs that include an
937    * accumulation buffer.
938    */
939   for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
940      __DRIconfig **new_configs;
941
942      if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
943	 depth_bits[0] = 16;
944	 stencil_bits[0] = 0;
945      } else {
946	 depth_bits[0] = 24;
947	 stencil_bits[0] = 8;
948      }
949
950      new_configs = driCreateConfigs(fb_format[color], fb_type[color],
951				     depth_bits, stencil_bits, 1,
952				     back_buffer_modes + 1, 1,
953				     msaa_samples_array, 1,
954				     true);
955      if (configs == NULL)
956	 configs = new_configs;
957      else
958	 configs = driConcatConfigs(configs, new_configs);
959   }
960
961   if (configs == NULL) {
962      fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
963              __LINE__);
964      return NULL;
965   }
966
967   return (const __DRIconfig **)configs;
968}
969
970struct intel_buffer {
971   __DRIbuffer base;
972   struct intel_region *region;
973};
974
975static __DRIbuffer *
976intelAllocateBuffer(__DRIscreen *screen,
977		    unsigned attachment, unsigned format,
978		    int width, int height)
979{
980   struct intel_buffer *intelBuffer;
981   struct intel_screen *intelScreen = screen->driverPrivate;
982
983   assert(attachment == __DRI_BUFFER_FRONT_LEFT ||
984          attachment == __DRI_BUFFER_BACK_LEFT);
985
986   intelBuffer = CALLOC(sizeof *intelBuffer);
987   if (intelBuffer == NULL)
988      return NULL;
989
990   /* The front and back buffers are color buffers, which are X tiled. */
991   intelBuffer->region = intel_region_alloc(intelScreen,
992                                            I915_TILING_X,
993                                            format / 8,
994                                            width,
995                                            height,
996                                            true);
997
998   if (intelBuffer->region == NULL) {
999	   FREE(intelBuffer);
1000	   return NULL;
1001   }
1002
1003   intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
1004
1005   intelBuffer->base.attachment = attachment;
1006   intelBuffer->base.cpp = intelBuffer->region->cpp;
1007   intelBuffer->base.pitch =
1008         intelBuffer->region->pitch * intelBuffer->region->cpp;
1009
1010   return &intelBuffer->base;
1011}
1012
1013static void
1014intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
1015{
1016   struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
1017
1018   intel_region_release(&intelBuffer->region);
1019   free(intelBuffer);
1020}
1021
1022
1023const struct __DriverAPIRec driDriverAPI = {
1024   .InitScreen		 = intelInitScreen2,
1025   .DestroyScreen	 = intelDestroyScreen,
1026   .CreateContext	 = intelCreateContext,
1027   .DestroyContext	 = intelDestroyContext,
1028   .CreateBuffer	 = intelCreateBuffer,
1029   .DestroyBuffer	 = intelDestroyBuffer,
1030   .MakeCurrent		 = intelMakeCurrent,
1031   .UnbindContext	 = intelUnbindContext,
1032   .AllocateBuffer       = intelAllocateBuffer,
1033   .ReleaseBuffer        = intelReleaseBuffer
1034};
1035
1036/* This is the table of extensions that the loader will dlsym() for. */
1037PUBLIC const __DRIextension *__driDriverExtensions[] = {
1038    &driCoreExtension.base,
1039    &driDRI2Extension.base,
1040    NULL
1041};
1042