intel_screen.c revision 89a82d72cafc1efbcf099e5229ba9b1cb53504f0 
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
37#include "utils.h"
38#include "xmlpool.h"
39
40PUBLIC const char __driConfigOptions[] =
41   DRI_CONF_BEGIN
42   DRI_CONF_SECTION_PERFORMANCE
43      DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
44      /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
45       * DRI_CONF_BO_REUSE_ALL
46       */
47      DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
48	 DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
49	    DRI_CONF_ENUM(0, "Disable buffer object reuse")
50	    DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
51	 DRI_CONF_DESC_END
52      DRI_CONF_OPT_END
53
54      DRI_CONF_OPT_BEGIN(texture_tiling, bool, true)
55	 DRI_CONF_DESC(en, "Enable texture tiling")
56      DRI_CONF_OPT_END
57
58      DRI_CONF_OPT_BEGIN(early_z, bool, false)
59	 DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
60      DRI_CONF_OPT_END
61
62      DRI_CONF_OPT_BEGIN(fragment_shader, bool, true)
63	 DRI_CONF_DESC(en, "Enable limited ARB_fragment_shader support on 915/945.")
64      DRI_CONF_OPT_END
65
66   DRI_CONF_SECTION_END
67   DRI_CONF_SECTION_QUALITY
68      DRI_CONF_FORCE_S3TC_ENABLE(false)
69      DRI_CONF_ALLOW_LARGE_TEXTURES(2)
70   DRI_CONF_SECTION_END
71   DRI_CONF_SECTION_DEBUG
72     DRI_CONF_NO_RAST(false)
73     DRI_CONF_ALWAYS_FLUSH_BATCH(false)
74     DRI_CONF_ALWAYS_FLUSH_CACHE(false)
75
76      DRI_CONF_OPT_BEGIN(stub_occlusion_query, bool, false)
77	 DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
78      DRI_CONF_OPT_END
79   DRI_CONF_SECTION_END
80DRI_CONF_END;
81
82const GLuint __driNConfigOptions = 11;
83
84#include "intel_batchbuffer.h"
85#include "intel_buffers.h"
86#include "intel_bufmgr.h"
87#include "intel_chipset.h"
88#include "intel_fbo.h"
89#include "intel_screen.h"
90#include "intel_tex.h"
91#include "intel_regions.h"
92
93#include "i915_drm.h"
94
95#ifdef USE_NEW_INTERFACE
96static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
97#endif /*USE_NEW_INTERFACE */
98
99static const __DRItexBufferExtension intelTexBufferExtension = {
100    { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
101   intelSetTexBuffer,
102   intelSetTexBuffer2,
103};
104
105static void
106intelDRI2Flush(__DRIdrawable *drawable)
107{
108   GET_CURRENT_CONTEXT(ctx);
109   struct intel_context *intel = intel_context(ctx);
110
111   if (intel->gen < 4)
112      INTEL_FIREVERTICES(intel);
113
114   intel->need_throttle = GL_TRUE;
115
116   if (intel->batch.used)
117      intel_batchbuffer_flush(intel);
118}
119
120static const struct __DRI2flushExtensionRec intelFlushExtension = {
121    { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
122    intelDRI2Flush,
123    dri2InvalidateDrawable,
124};
125
126static __DRIimage *
127intel_create_image_from_name(__DRIscreen *screen,
128			     int width, int height, int format,
129			     int name, int pitch, void *loaderPrivate)
130{
131    struct intel_screen *intelScreen = screen->private;
132    __DRIimage *image;
133    int cpp;
134
135    image = CALLOC(sizeof *image);
136    if (image == NULL)
137	return NULL;
138
139    switch (format) {
140    case __DRI_IMAGE_FORMAT_RGB565:
141       image->format = MESA_FORMAT_RGB565;
142       image->internal_format = GL_RGB;
143       image->data_type = GL_UNSIGNED_BYTE;
144       break;
145    case __DRI_IMAGE_FORMAT_XRGB8888:
146       image->format = MESA_FORMAT_XRGB8888;
147       image->internal_format = GL_RGB;
148       image->data_type = GL_UNSIGNED_BYTE;
149       break;
150    case __DRI_IMAGE_FORMAT_ARGB8888:
151       image->format = MESA_FORMAT_ARGB8888;
152       image->internal_format = GL_RGBA;
153       image->data_type = GL_UNSIGNED_BYTE;
154       break;
155    default:
156       free(image);
157       return NULL;
158    }
159
160    image->data = loaderPrivate;
161    cpp = _mesa_get_format_bytes(image->format);
162
163    image->region = intel_region_alloc_for_handle(intelScreen,
164						  cpp, width, height,
165						  pitch, name, "image");
166    if (image->region == NULL) {
167       FREE(image);
168       return NULL;
169    }
170
171    return image;
172}
173
174static __DRIimage *
175intel_create_image_from_renderbuffer(__DRIcontext *context,
176				     int renderbuffer, void *loaderPrivate)
177{
178   __DRIimage *image;
179   struct intel_context *intel = context->driverPrivate;
180   struct gl_renderbuffer *rb;
181   struct intel_renderbuffer *irb;
182
183   rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
184   if (!rb) {
185      _mesa_error(&intel->ctx,
186		  GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
187      return NULL;
188   }
189
190   irb = intel_renderbuffer(rb);
191   image = CALLOC(sizeof *image);
192   if (image == NULL)
193      return NULL;
194
195   image->internal_format = rb->InternalFormat;
196   image->format = rb->Format;
197   image->data_type = rb->DataType;
198   image->data = loaderPrivate;
199   intel_region_reference(&image->region, irb->region);
200
201   return image;
202}
203
204static void
205intel_destroy_image(__DRIimage *image)
206{
207    intel_region_release(&image->region);
208    FREE(image);
209}
210
211static __DRIimage *
212intel_create_image(__DRIscreen *screen,
213		   int width, int height, int format,
214		   unsigned int use,
215		   void *loaderPrivate)
216{
217   __DRIimage *image;
218   struct intel_screen *intelScreen = screen->private;
219   uint32_t tiling;
220   int cpp;
221
222   tiling = I915_TILING_X;
223   if (use & __DRI_IMAGE_USE_CURSOR) {
224      if (width != 64 || height != 64)
225	 return NULL;
226      tiling = I915_TILING_NONE;
227   }
228
229   image = CALLOC(sizeof *image);
230   if (image == NULL)
231      return NULL;
232
233   switch (format) {
234   case __DRI_IMAGE_FORMAT_RGB565:
235      image->format = MESA_FORMAT_RGB565;
236      image->internal_format = GL_RGB;
237      image->data_type = GL_UNSIGNED_BYTE;
238      break;
239   case __DRI_IMAGE_FORMAT_XRGB8888:
240      image->format = MESA_FORMAT_XRGB8888;
241      image->internal_format = GL_RGB;
242      image->data_type = GL_UNSIGNED_BYTE;
243      break;
244   case __DRI_IMAGE_FORMAT_ARGB8888:
245      image->format = MESA_FORMAT_ARGB8888;
246      image->internal_format = GL_RGBA;
247      image->data_type = GL_UNSIGNED_BYTE;
248      break;
249   default:
250      free(image);
251      return NULL;
252   }
253
254   image->data = loaderPrivate;
255   cpp = _mesa_get_format_bytes(image->format);
256
257   image->region =
258      intel_region_alloc(intelScreen, tiling,
259			 cpp, width, height, GL_TRUE);
260   if (image->region == NULL) {
261      FREE(image);
262      return NULL;
263   }
264
265   return image;
266}
267
268static GLboolean
269intel_query_image(__DRIimage *image, int attrib, int *value)
270{
271   switch (attrib) {
272   case __DRI_IMAGE_ATTRIB_STRIDE:
273      *value = image->region->pitch * image->region->cpp;
274      return GL_TRUE;
275   case __DRI_IMAGE_ATTRIB_HANDLE:
276      *value = image->region->buffer->handle;
277      return GL_TRUE;
278   case __DRI_IMAGE_ATTRIB_NAME:
279      return intel_region_flink(image->region, (uint32_t *) value);
280   default:
281      return GL_FALSE;
282   }
283}
284
285static struct __DRIimageExtensionRec intelImageExtension = {
286    { __DRI_IMAGE, __DRI_IMAGE_VERSION },
287    intel_create_image_from_name,
288    intel_create_image_from_renderbuffer,
289    intel_destroy_image,
290    intel_create_image,
291    intel_query_image
292};
293
294static const __DRIextension *intelScreenExtensions[] = {
295    &driReadDrawableExtension,
296    &intelTexBufferExtension.base,
297    &intelFlushExtension.base,
298    &intelImageExtension.base,
299    &dri2ConfigQueryExtension.base,
300    NULL
301};
302
303static GLboolean
304intel_get_param(__DRIscreen *psp, int param, int *value)
305{
306   int ret;
307   struct drm_i915_getparam gp;
308
309   gp.param = param;
310   gp.value = value;
311
312   ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
313   if (ret) {
314      if (ret != -EINVAL)
315	 _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
316      return GL_FALSE;
317   }
318
319   return GL_TRUE;
320}
321
322static GLboolean
323intel_get_boolean(__DRIscreen *psp, int param)
324{
325   int value = 0;
326   return intel_get_param(psp, param, &value) && value;
327}
328
329static void
330nop_callback(GLuint key, void *data, void *userData)
331{
332}
333
334static void
335intelDestroyScreen(__DRIscreen * sPriv)
336{
337   struct intel_screen *intelScreen = sPriv->private;
338
339   dri_bufmgr_destroy(intelScreen->bufmgr);
340   driDestroyOptionInfo(&intelScreen->optionCache);
341
342   /* Some regions may still have references to them at this point, so
343    * flush the hash table to prevent _mesa_DeleteHashTable() from
344    * complaining about the hash not being empty; */
345   _mesa_HashDeleteAll(intelScreen->named_regions, nop_callback, NULL);
346   _mesa_DeleteHashTable(intelScreen->named_regions);
347
348   FREE(intelScreen);
349   sPriv->private = NULL;
350}
351
352
353/**
354 * This is called when we need to set up GL rendering to a new X window.
355 */
356static GLboolean
357intelCreateBuffer(__DRIscreen * driScrnPriv,
358                  __DRIdrawable * driDrawPriv,
359                  const struct gl_config * mesaVis, GLboolean isPixmap)
360{
361   struct intel_renderbuffer *rb;
362
363   if (isPixmap) {
364      return GL_FALSE;          /* not implemented */
365   }
366   else {
367      GLboolean swStencil = (mesaVis->stencilBits > 0 &&
368                             mesaVis->depthBits != 24);
369      gl_format rgbFormat;
370
371      struct gl_framebuffer *fb = CALLOC_STRUCT(gl_framebuffer);
372
373      if (!fb)
374	 return GL_FALSE;
375
376      _mesa_initialize_window_framebuffer(fb, mesaVis);
377
378      if (mesaVis->redBits == 5)
379	 rgbFormat = MESA_FORMAT_RGB565;
380      else if (mesaVis->alphaBits == 0)
381	 rgbFormat = MESA_FORMAT_XRGB8888;
382      else
383	 rgbFormat = MESA_FORMAT_ARGB8888;
384
385      /* setup the hardware-based renderbuffers */
386      rb = intel_create_renderbuffer(rgbFormat);
387      _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base);
388
389      if (mesaVis->doubleBufferMode) {
390	 rb = intel_create_renderbuffer(rgbFormat);
391         _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base);
392      }
393
394      if (mesaVis->depthBits == 24) {
395	 assert(mesaVis->stencilBits == 8);
396	 /* combined depth/stencil buffer */
397	 struct intel_renderbuffer *depthStencilRb
398	    = intel_create_renderbuffer(MESA_FORMAT_S8_Z24);
399	 /* note: bind RB to two attachment points */
400	 _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthStencilRb->Base);
401	 _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &depthStencilRb->Base);
402      }
403      else if (mesaVis->depthBits == 16) {
404         /* just 16-bit depth buffer, no hw stencil */
405         struct intel_renderbuffer *depthRb
406	    = intel_create_renderbuffer(MESA_FORMAT_Z16);
407         _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
408      }
409
410      /* now add any/all software-based renderbuffers we may need */
411      _mesa_add_soft_renderbuffers(fb,
412                                   GL_FALSE, /* never sw color */
413                                   GL_FALSE, /* never sw depth */
414                                   swStencil, mesaVis->accumRedBits > 0,
415                                   GL_FALSE, /* never sw alpha */
416                                   GL_FALSE  /* never sw aux */ );
417      driDrawPriv->driverPrivate = fb;
418
419      return GL_TRUE;
420   }
421}
422
423static void
424intelDestroyBuffer(__DRIdrawable * driDrawPriv)
425{
426    struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
427
428    _mesa_reference_framebuffer(&fb, NULL);
429}
430
431/* There are probably better ways to do this, such as an
432 * init-designated function to register chipids and createcontext
433 * functions.
434 */
435extern GLboolean i830CreateContext(const struct gl_config * mesaVis,
436                                   __DRIcontext * driContextPriv,
437                                   void *sharedContextPrivate);
438
439extern GLboolean i915CreateContext(int api,
440				   const struct gl_config * mesaVis,
441                                   __DRIcontext * driContextPriv,
442                                   void *sharedContextPrivate);
443extern GLboolean brwCreateContext(int api,
444				  const struct gl_config * mesaVis,
445				  __DRIcontext * driContextPriv,
446				  void *sharedContextPrivate);
447
448static GLboolean
449intelCreateContext(gl_api api,
450		   const struct gl_config * mesaVis,
451                   __DRIcontext * driContextPriv,
452                   void *sharedContextPrivate)
453{
454   __DRIscreen *sPriv = driContextPriv->driScreenPriv;
455   struct intel_screen *intelScreen = sPriv->private;
456
457#ifdef I915
458   if (IS_9XX(intelScreen->deviceID)) {
459      if (!IS_965(intelScreen->deviceID)) {
460	 return i915CreateContext(api, mesaVis, driContextPriv,
461				  sharedContextPrivate);
462      }
463   } else {
464      intelScreen->no_vbo = GL_TRUE;
465      return i830CreateContext(mesaVis, driContextPriv, sharedContextPrivate);
466   }
467#else
468   if (IS_965(intelScreen->deviceID))
469      return brwCreateContext(api, mesaVis,
470			      driContextPriv, sharedContextPrivate);
471#endif
472   fprintf(stderr, "Unrecognized deviceID 0x%x\n", intelScreen->deviceID);
473   return GL_FALSE;
474}
475
476static GLboolean
477intel_init_bufmgr(struct intel_screen *intelScreen)
478{
479   __DRIscreen *spriv = intelScreen->driScrnPriv;
480   int num_fences = 0;
481
482   intelScreen->no_hw = (getenv("INTEL_NO_HW") != NULL ||
483			 getenv("INTEL_DEVID_OVERRIDE") != NULL);
484
485   intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
486   if (intelScreen->bufmgr == NULL) {
487      fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
488	      __func__, __LINE__);
489      return GL_FALSE;
490   }
491
492   if (!intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences) ||
493       num_fences == 0) {
494      fprintf(stderr, "[%s: %u] Kernel 2.6.29 required.\n", __func__, __LINE__);
495      return GL_FALSE;
496   }
497
498   drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
499
500   intelScreen->named_regions = _mesa_NewHashTable();
501
502   intelScreen->relaxed_relocations = 0;
503   intelScreen->relaxed_relocations |=
504      intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA) << 0;
505
506   return GL_TRUE;
507}
508
509/**
510 * This is the driver specific part of the createNewScreen entry point.
511 * Called when using DRI2.
512 *
513 * \return the struct gl_config supported by this driver
514 */
515static const
516__DRIconfig **intelInitScreen2(__DRIscreen *psp)
517{
518   struct intel_screen *intelScreen;
519   GLenum fb_format[3];
520   GLenum fb_type[3];
521   unsigned int api_mask;
522   char *devid_override;
523
524   static const GLenum back_buffer_modes[] = {
525       GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
526   };
527   uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
528   int color;
529   __DRIconfig **configs = NULL;
530
531   /* Allocate the private area */
532   intelScreen = CALLOC(sizeof *intelScreen);
533   if (!intelScreen) {
534      fprintf(stderr, "\nERROR!  Allocating private area failed\n");
535      return GL_FALSE;
536   }
537   /* parse information in __driConfigOptions */
538   driParseOptionInfo(&intelScreen->optionCache,
539                      __driConfigOptions, __driNConfigOptions);
540
541   intelScreen->driScrnPriv = psp;
542   psp->private = (void *) intelScreen;
543
544   /* Determine chipset ID */
545   if (!intel_get_param(psp, I915_PARAM_CHIPSET_ID,
546			&intelScreen->deviceID))
547      return GL_FALSE;
548
549   /* Allow an override of the device ID for the purpose of making the
550    * driver produce dumps for debugging of new chipset enablement.
551    * This implies INTEL_NO_HW, to avoid programming your actual GPU
552    * incorrectly.
553    */
554   devid_override = getenv("INTEL_DEVID_OVERRIDE");
555   if (devid_override) {
556      intelScreen->deviceID = strtod(devid_override, NULL);
557   }
558
559   if (IS_GEN7(intelScreen->deviceID)) {
560      intelScreen->gen = 7;
561   } else if (IS_GEN6(intelScreen->deviceID)) {
562      intelScreen->gen = 6;
563   } else if (IS_GEN5(intelScreen->deviceID)) {
564      intelScreen->gen = 5;
565   } else if (IS_965(intelScreen->deviceID)) {
566      intelScreen->gen = 4;
567   } else if (IS_9XX(intelScreen->deviceID)) {
568      intelScreen->gen = 3;
569   } else {
570      intelScreen->gen = 2;
571   }
572
573   api_mask = (1 << __DRI_API_OPENGL);
574#if FEATURE_ES1
575   api_mask |= (1 << __DRI_API_GLES);
576#endif
577#if FEATURE_ES2
578   api_mask |= (1 << __DRI_API_GLES2);
579#endif
580
581   if (IS_9XX(intelScreen->deviceID) || IS_965(intelScreen->deviceID))
582      psp->api_mask = api_mask;
583
584   if (!intel_init_bufmgr(intelScreen))
585       return GL_FALSE;
586
587   psp->extensions = intelScreenExtensions;
588
589   msaa_samples_array[0] = 0;
590
591   fb_format[0] = GL_RGB;
592   fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
593
594   fb_format[1] = GL_BGR;
595   fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
596
597   fb_format[2] = GL_BGRA;
598   fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
599
600   depth_bits[0] = 0;
601   stencil_bits[0] = 0;
602
603   /* Generate a rich set of useful configs that do not include an
604    * accumulation buffer.
605    */
606   for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
607      __DRIconfig **new_configs;
608      int depth_factor;
609
610      /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
611       * buffer that has a diffferent number of bits per pixel than the color
612       * buffer.  This isn't yet supported here.
613       */
614      if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
615	 depth_bits[1] = 16;
616	 stencil_bits[1] = 0;
617      } else {
618	 depth_bits[1] = 24;
619	 stencil_bits[1] = 8;
620      }
621
622      depth_factor = 2;
623
624      new_configs = driCreateConfigs(fb_format[color], fb_type[color],
625				     depth_bits,
626				     stencil_bits,
627				     depth_factor,
628				     back_buffer_modes,
629				     ARRAY_SIZE(back_buffer_modes),
630				     msaa_samples_array,
631				     ARRAY_SIZE(msaa_samples_array),
632				     GL_FALSE);
633      if (configs == NULL)
634	 configs = new_configs;
635      else
636	 configs = driConcatConfigs(configs, new_configs);
637   }
638
639   /* Generate the minimum possible set of configs that include an
640    * accumulation buffer.
641    */
642   for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
643      __DRIconfig **new_configs;
644
645      if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
646	 depth_bits[0] = 16;
647	 stencil_bits[0] = 0;
648      } else {
649	 depth_bits[0] = 24;
650	 stencil_bits[0] = 8;
651      }
652
653      new_configs = driCreateConfigs(fb_format[color], fb_type[color],
654				     depth_bits, stencil_bits, 1,
655				     back_buffer_modes + 1, 1,
656				     msaa_samples_array, 1,
657				     GL_TRUE);
658      if (configs == NULL)
659	 configs = new_configs;
660      else
661	 configs = driConcatConfigs(configs, new_configs);
662   }
663
664   if (configs == NULL) {
665      fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
666              __LINE__);
667      return NULL;
668   }
669
670   return (const __DRIconfig **)configs;
671}
672
673struct intel_buffer {
674   __DRIbuffer base;
675   struct intel_region *region;
676};
677
678static __DRIbuffer *
679intelAllocateBuffer(__DRIscreen *screen,
680		    unsigned attachment, unsigned format,
681		    int width, int height)
682{
683   struct intel_buffer *intelBuffer;
684   struct intel_screen *intelScreen = screen->private;
685   uint32_t tiling;
686
687   intelBuffer = CALLOC(sizeof *intelBuffer);
688   if (intelBuffer == NULL)
689      return NULL;
690
691   if ((attachment == __DRI_BUFFER_DEPTH ||
692	attachment == __DRI_BUFFER_STENCIL ||
693	attachment == __DRI_BUFFER_DEPTH_STENCIL) &&
694       intelScreen->gen >= 4)
695      tiling = I915_TILING_Y;
696   else
697      tiling = I915_TILING_X;
698
699   intelBuffer->region = intel_region_alloc(intelScreen, tiling,
700					    format / 8, width, height, GL_TRUE);
701
702   if (intelBuffer->region == NULL) {
703	   FREE(intelBuffer);
704	   return NULL;
705   }
706
707   intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
708
709   intelBuffer->base.attachment = attachment;
710   intelBuffer->base.cpp = intelBuffer->region->cpp;
711   intelBuffer->base.pitch =
712         intelBuffer->region->pitch * intelBuffer->region->cpp;
713
714   return &intelBuffer->base;
715}
716
717static void
718intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
719{
720   struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
721
722   intel_region_release(&intelBuffer->region);
723   free(intelBuffer);
724}
725
726
727const struct __DriverAPIRec driDriverAPI = {
728   .DestroyScreen	 = intelDestroyScreen,
729   .CreateContext	 = intelCreateContext,
730   .DestroyContext	 = intelDestroyContext,
731   .CreateBuffer	 = intelCreateBuffer,
732   .DestroyBuffer	 = intelDestroyBuffer,
733   .MakeCurrent		 = intelMakeCurrent,
734   .UnbindContext	 = intelUnbindContext,
735   .InitScreen2		 = intelInitScreen2,
736   .AllocateBuffer       = intelAllocateBuffer,
737   .ReleaseBuffer        = intelReleaseBuffer
738};
739
740/* This is the table of extensions that the loader will dlsym() for. */
741PUBLIC const __DRIextension *__driDriverExtensions[] = {
742    &driCoreExtension.base,
743    &driDRI2Extension.base,
744    NULL
745};
746