intel_screen.c revision 5dfba09d49ccec2655e4d22ef6f46b9c67862bc9 
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   int cpp;
220
221   image = CALLOC(sizeof *image);
222   if (image == NULL)
223      return NULL;
224
225   switch (format) {
226   case __DRI_IMAGE_FORMAT_RGB565:
227      image->format = MESA_FORMAT_RGB565;
228      image->internal_format = GL_RGB;
229      image->data_type = GL_UNSIGNED_BYTE;
230      break;
231   case __DRI_IMAGE_FORMAT_XRGB8888:
232      image->format = MESA_FORMAT_XRGB8888;
233      image->internal_format = GL_RGB;
234      image->data_type = GL_UNSIGNED_BYTE;
235      break;
236   case __DRI_IMAGE_FORMAT_ARGB8888:
237      image->format = MESA_FORMAT_ARGB8888;
238      image->internal_format = GL_RGBA;
239      image->data_type = GL_UNSIGNED_BYTE;
240      break;
241   default:
242      free(image);
243      return NULL;
244   }
245
246   image->data = loaderPrivate;
247   cpp = _mesa_get_format_bytes(image->format);
248
249   image->region =
250      intel_region_alloc(intelScreen, I915_TILING_X,
251			 cpp, width, height, GL_TRUE);
252   if (image->region == NULL) {
253      FREE(image);
254      return NULL;
255   }
256
257   return image;
258}
259
260static GLboolean
261intel_query_image(__DRIimage *image, int attrib, int *value)
262{
263   switch (attrib) {
264   case __DRI_IMAGE_ATTRIB_STRIDE:
265      *value = image->region->pitch * image->region->cpp;
266      return GL_TRUE;
267   case __DRI_IMAGE_ATTRIB_HANDLE:
268      *value = image->region->buffer->handle;
269      return GL_TRUE;
270   case __DRI_IMAGE_ATTRIB_NAME:
271      return intel_region_flink(image->region, (uint32_t *) value);
272   default:
273      return GL_FALSE;
274   }
275}
276
277static struct __DRIimageExtensionRec intelImageExtension = {
278    { __DRI_IMAGE, __DRI_IMAGE_VERSION },
279    intel_create_image_from_name,
280    intel_create_image_from_renderbuffer,
281    intel_destroy_image,
282    intel_create_image,
283    intel_query_image
284};
285
286static const __DRIextension *intelScreenExtensions[] = {
287    &driReadDrawableExtension,
288    &intelTexBufferExtension.base,
289    &intelFlushExtension.base,
290    &intelImageExtension.base,
291    &dri2ConfigQueryExtension.base,
292    NULL
293};
294
295static GLboolean
296intel_get_param(__DRIscreen *psp, int param, int *value)
297{
298   int ret;
299   struct drm_i915_getparam gp;
300
301   gp.param = param;
302   gp.value = value;
303
304   ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
305   if (ret) {
306      if (ret != -EINVAL)
307	 _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
308      return GL_FALSE;
309   }
310
311   return GL_TRUE;
312}
313
314static GLboolean
315intel_get_boolean(__DRIscreen *psp, int param)
316{
317   int value = 0;
318   return intel_get_param(psp, param, &value) && value;
319}
320
321static void
322nop_callback(GLuint key, void *data, void *userData)
323{
324}
325
326static void
327intelDestroyScreen(__DRIscreen * sPriv)
328{
329   struct intel_screen *intelScreen = sPriv->private;
330
331   dri_bufmgr_destroy(intelScreen->bufmgr);
332   driDestroyOptionInfo(&intelScreen->optionCache);
333
334   /* Some regions may still have references to them at this point, so
335    * flush the hash table to prevent _mesa_DeleteHashTable() from
336    * complaining about the hash not being empty; */
337   _mesa_HashDeleteAll(intelScreen->named_regions, nop_callback, NULL);
338   _mesa_DeleteHashTable(intelScreen->named_regions);
339
340   FREE(intelScreen);
341   sPriv->private = NULL;
342}
343
344
345/**
346 * This is called when we need to set up GL rendering to a new X window.
347 */
348static GLboolean
349intelCreateBuffer(__DRIscreen * driScrnPriv,
350                  __DRIdrawable * driDrawPriv,
351                  const struct gl_config * mesaVis, GLboolean isPixmap)
352{
353   struct intel_renderbuffer *rb;
354
355   if (isPixmap) {
356      return GL_FALSE;          /* not implemented */
357   }
358   else {
359      GLboolean swStencil = (mesaVis->stencilBits > 0 &&
360                             mesaVis->depthBits != 24);
361      gl_format rgbFormat;
362
363      struct gl_framebuffer *fb = CALLOC_STRUCT(gl_framebuffer);
364
365      if (!fb)
366	 return GL_FALSE;
367
368      _mesa_initialize_window_framebuffer(fb, mesaVis);
369
370      if (mesaVis->redBits == 5)
371	 rgbFormat = MESA_FORMAT_RGB565;
372      else if (mesaVis->alphaBits == 0)
373	 rgbFormat = MESA_FORMAT_XRGB8888;
374      else
375	 rgbFormat = MESA_FORMAT_ARGB8888;
376
377      /* setup the hardware-based renderbuffers */
378      rb = intel_create_renderbuffer(rgbFormat);
379      _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base);
380
381      if (mesaVis->doubleBufferMode) {
382	 rb = intel_create_renderbuffer(rgbFormat);
383         _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base);
384      }
385
386      if (mesaVis->depthBits == 24) {
387	 assert(mesaVis->stencilBits == 8);
388	 /* combined depth/stencil buffer */
389	 struct intel_renderbuffer *depthStencilRb
390	    = intel_create_renderbuffer(MESA_FORMAT_S8_Z24);
391	 /* note: bind RB to two attachment points */
392	 _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthStencilRb->Base);
393	 _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &depthStencilRb->Base);
394      }
395      else if (mesaVis->depthBits == 16) {
396         /* just 16-bit depth buffer, no hw stencil */
397         struct intel_renderbuffer *depthRb
398	    = intel_create_renderbuffer(MESA_FORMAT_Z16);
399         _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
400      }
401
402      /* now add any/all software-based renderbuffers we may need */
403      _mesa_add_soft_renderbuffers(fb,
404                                   GL_FALSE, /* never sw color */
405                                   GL_FALSE, /* never sw depth */
406                                   swStencil, mesaVis->accumRedBits > 0,
407                                   GL_FALSE, /* never sw alpha */
408                                   GL_FALSE  /* never sw aux */ );
409      driDrawPriv->driverPrivate = fb;
410
411      return GL_TRUE;
412   }
413}
414
415static void
416intelDestroyBuffer(__DRIdrawable * driDrawPriv)
417{
418    struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
419
420    _mesa_reference_framebuffer(&fb, NULL);
421}
422
423/* There are probably better ways to do this, such as an
424 * init-designated function to register chipids and createcontext
425 * functions.
426 */
427extern GLboolean i830CreateContext(const struct gl_config * mesaVis,
428                                   __DRIcontext * driContextPriv,
429                                   void *sharedContextPrivate);
430
431extern GLboolean i915CreateContext(int api,
432				   const struct gl_config * mesaVis,
433                                   __DRIcontext * driContextPriv,
434                                   void *sharedContextPrivate);
435extern GLboolean brwCreateContext(int api,
436				  const struct gl_config * mesaVis,
437				  __DRIcontext * driContextPriv,
438				  void *sharedContextPrivate);
439
440static GLboolean
441intelCreateContext(gl_api api,
442		   const struct gl_config * mesaVis,
443                   __DRIcontext * driContextPriv,
444                   void *sharedContextPrivate)
445{
446   __DRIscreen *sPriv = driContextPriv->driScreenPriv;
447   struct intel_screen *intelScreen = sPriv->private;
448
449#ifdef I915
450   if (IS_9XX(intelScreen->deviceID)) {
451      if (!IS_965(intelScreen->deviceID)) {
452	 return i915CreateContext(api, mesaVis, driContextPriv,
453				  sharedContextPrivate);
454      }
455   } else {
456      intelScreen->no_vbo = GL_TRUE;
457      return i830CreateContext(mesaVis, driContextPriv, sharedContextPrivate);
458   }
459#else
460   if (IS_965(intelScreen->deviceID))
461      return brwCreateContext(api, mesaVis,
462			      driContextPriv, sharedContextPrivate);
463#endif
464   fprintf(stderr, "Unrecognized deviceID 0x%x\n", intelScreen->deviceID);
465   return GL_FALSE;
466}
467
468static GLboolean
469intel_init_bufmgr(struct intel_screen *intelScreen)
470{
471   __DRIscreen *spriv = intelScreen->driScrnPriv;
472   int num_fences = 0;
473
474   intelScreen->no_hw = (getenv("INTEL_NO_HW") != NULL ||
475			 getenv("INTEL_DEVID_OVERRIDE") != NULL);
476
477   intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
478   if (intelScreen->bufmgr == NULL) {
479      fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
480	      __func__, __LINE__);
481      return GL_FALSE;
482   }
483
484   if (!intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences) ||
485       num_fences == 0) {
486      fprintf(stderr, "[%s: %u] Kernel 2.6.29 required.\n", __func__, __LINE__);
487      return GL_FALSE;
488   }
489
490   drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
491
492   intelScreen->named_regions = _mesa_NewHashTable();
493
494   intelScreen->relaxed_relocations = 0;
495   intelScreen->relaxed_relocations |=
496      intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA) << 0;
497
498   return GL_TRUE;
499}
500
501/**
502 * This is the driver specific part of the createNewScreen entry point.
503 * Called when using DRI2.
504 *
505 * \return the struct gl_config supported by this driver
506 */
507static const
508__DRIconfig **intelInitScreen2(__DRIscreen *psp)
509{
510   struct intel_screen *intelScreen;
511   GLenum fb_format[3];
512   GLenum fb_type[3];
513   unsigned int api_mask;
514   char *devid_override;
515
516   static const GLenum back_buffer_modes[] = {
517       GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
518   };
519   uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
520   int color;
521   __DRIconfig **configs = NULL;
522
523   /* Allocate the private area */
524   intelScreen = CALLOC(sizeof *intelScreen);
525   if (!intelScreen) {
526      fprintf(stderr, "\nERROR!  Allocating private area failed\n");
527      return GL_FALSE;
528   }
529   /* parse information in __driConfigOptions */
530   driParseOptionInfo(&intelScreen->optionCache,
531                      __driConfigOptions, __driNConfigOptions);
532
533   intelScreen->driScrnPriv = psp;
534   psp->private = (void *) intelScreen;
535
536   /* Determine chipset ID */
537   if (!intel_get_param(psp, I915_PARAM_CHIPSET_ID,
538			&intelScreen->deviceID))
539      return GL_FALSE;
540
541   /* Allow an override of the device ID for the purpose of making the
542    * driver produce dumps for debugging of new chipset enablement.
543    * This implies INTEL_NO_HW, to avoid programming your actual GPU
544    * incorrectly.
545    */
546   devid_override = getenv("INTEL_DEVID_OVERRIDE");
547   if (devid_override) {
548      intelScreen->deviceID = strtod(devid_override, NULL);
549   }
550
551   if (IS_GEN6(intelScreen->deviceID)) {
552      intelScreen->gen = 6;
553   } else if (IS_GEN5(intelScreen->deviceID)) {
554      intelScreen->gen = 5;
555   } else if (IS_965(intelScreen->deviceID)) {
556      intelScreen->gen = 4;
557   } else if (IS_9XX(intelScreen->deviceID)) {
558      intelScreen->gen = 3;
559   } else {
560      intelScreen->gen = 2;
561   }
562
563   api_mask = (1 << __DRI_API_OPENGL);
564#if FEATURE_ES1
565   api_mask |= (1 << __DRI_API_GLES);
566#endif
567#if FEATURE_ES2
568   api_mask |= (1 << __DRI_API_GLES2);
569#endif
570
571   if (IS_9XX(intelScreen->deviceID) || IS_965(intelScreen->deviceID))
572      psp->api_mask = api_mask;
573
574   if (!intel_init_bufmgr(intelScreen))
575       return GL_FALSE;
576
577   psp->extensions = intelScreenExtensions;
578
579   msaa_samples_array[0] = 0;
580
581   fb_format[0] = GL_RGB;
582   fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
583
584   fb_format[1] = GL_BGR;
585   fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
586
587   fb_format[2] = GL_BGRA;
588   fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
589
590   depth_bits[0] = 0;
591   stencil_bits[0] = 0;
592
593   /* Generate a rich set of useful configs that do not include an
594    * accumulation buffer.
595    */
596   for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
597      __DRIconfig **new_configs;
598      int depth_factor;
599
600      /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
601       * buffer that has a diffferent number of bits per pixel than the color
602       * buffer.  This isn't yet supported here.
603       */
604      if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
605	 depth_bits[1] = 16;
606	 stencil_bits[1] = 0;
607      } else {
608	 depth_bits[1] = 24;
609	 stencil_bits[1] = 8;
610      }
611
612      depth_factor = 2;
613
614      new_configs = driCreateConfigs(fb_format[color], fb_type[color],
615				     depth_bits,
616				     stencil_bits,
617				     depth_factor,
618				     back_buffer_modes,
619				     ARRAY_SIZE(back_buffer_modes),
620				     msaa_samples_array,
621				     ARRAY_SIZE(msaa_samples_array),
622				     GL_FALSE);
623      if (configs == NULL)
624	 configs = new_configs;
625      else
626	 configs = driConcatConfigs(configs, new_configs);
627   }
628
629   /* Generate the minimum possible set of configs that include an
630    * accumulation buffer.
631    */
632   for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
633      __DRIconfig **new_configs;
634
635      if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
636	 depth_bits[0] = 16;
637	 stencil_bits[0] = 0;
638      } else {
639	 depth_bits[0] = 24;
640	 stencil_bits[0] = 8;
641      }
642
643      new_configs = driCreateConfigs(fb_format[color], fb_type[color],
644				     depth_bits, stencil_bits, 1,
645				     back_buffer_modes + 1, 1,
646				     msaa_samples_array, 1,
647				     GL_TRUE);
648      if (configs == NULL)
649	 configs = new_configs;
650      else
651	 configs = driConcatConfigs(configs, new_configs);
652   }
653
654   if (configs == NULL) {
655      fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
656              __LINE__);
657      return NULL;
658   }
659
660   return (const __DRIconfig **)configs;
661}
662
663struct intel_buffer {
664   __DRIbuffer base;
665   struct intel_region *region;
666};
667
668static __DRIbuffer *
669intelAllocateBuffer(__DRIscreen *screen,
670		    unsigned attachment, unsigned format,
671		    int width, int height)
672{
673   struct intel_buffer *intelBuffer;
674   struct intel_screen *intelScreen = screen->private;
675   uint32_t tiling;
676
677   intelBuffer = CALLOC(sizeof *intelBuffer);
678   if (intelBuffer == NULL)
679      return NULL;
680
681   if ((attachment == __DRI_BUFFER_DEPTH ||
682	attachment == __DRI_BUFFER_STENCIL ||
683	attachment == __DRI_BUFFER_DEPTH_STENCIL) &&
684       intelScreen->gen >= 4)
685      tiling = I915_TILING_Y;
686   else
687      tiling = I915_TILING_X;
688
689   intelBuffer->region = intel_region_alloc(intelScreen, tiling,
690					    format / 8, width, height, GL_TRUE);
691
692   if (intelBuffer->region == NULL) {
693	   FREE(intelBuffer);
694	   return NULL;
695   }
696
697   intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
698
699   intelBuffer->base.attachment = attachment;
700   intelBuffer->base.cpp = intelBuffer->region->cpp;
701   intelBuffer->base.pitch =
702         intelBuffer->region->pitch * intelBuffer->region->cpp;
703
704   return &intelBuffer->base;
705}
706
707static void
708intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
709{
710   struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
711
712   intel_region_release(&intelBuffer->region);
713   free(intelBuffer);
714}
715
716
717const struct __DriverAPIRec driDriverAPI = {
718   .DestroyScreen	 = intelDestroyScreen,
719   .CreateContext	 = intelCreateContext,
720   .DestroyContext	 = intelDestroyContext,
721   .CreateBuffer	 = intelCreateBuffer,
722   .DestroyBuffer	 = intelDestroyBuffer,
723   .MakeCurrent		 = intelMakeCurrent,
724   .UnbindContext	 = intelUnbindContext,
725   .InitScreen2		 = intelInitScreen2,
726   .AllocateBuffer       = intelAllocateBuffer,
727   .ReleaseBuffer        = intelReleaseBuffer
728};
729
730/* This is the table of extensions that the loader will dlsym() for. */
731PUBLIC const __DRIextension *__driDriverExtensions[] = {
732    &driCoreExtension.base,
733    &driDRI2Extension.base,
734    NULL
735};
736