intel_screen.c revision d61f07318c8678901b948fdaa8ccdf37aa3203e9 
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 "main/glheader.h"
29#include "main/context.h"
30#include "main/framebuffer.h"
31#include "main/renderbuffer.h"
32
33#include "utils.h"
34#include "vblank.h"
35#include "xmlpool.h"
36
37#include "intel_batchbuffer.h"
38#include "intel_buffers.h"
39#include "intel_bufmgr.h"
40#include "intel_chipset.h"
41#include "intel_extensions.h"
42#include "intel_fbo.h"
43#include "intel_regions.h"
44#include "intel_swapbuffers.h"
45#include "intel_screen.h"
46#include "intel_span.h"
47#include "intel_tex.h"
48
49#include "i915_drm.h"
50#include "i830_dri.h"
51
52#define DRI_CONF_TEXTURE_TILING(def) \
53	DRI_CONF_OPT_BEGIN(texture_tiling, bool, def)		\
54		DRI_CONF_DESC(en, "Enable texture tiling")	\
55	DRI_CONF_OPT_END					\
56
57PUBLIC const char __driConfigOptions[] =
58   DRI_CONF_BEGIN
59   DRI_CONF_SECTION_PERFORMANCE
60      DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
61      /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
62       * DRI_CONF_BO_REUSE_ALL
63       */
64      DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
65	 DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
66	    DRI_CONF_ENUM(0, "Disable buffer object reuse")
67	    DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
68	 DRI_CONF_DESC_END
69      DRI_CONF_OPT_END
70
71#ifdef I915
72     DRI_CONF_TEXTURE_TILING(false)
73#else
74     DRI_CONF_TEXTURE_TILING(true)
75#endif
76
77      DRI_CONF_OPT_BEGIN(early_z, bool, false)
78	 DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
79      DRI_CONF_OPT_END
80
81      DRI_CONF_OPT_BEGIN(fragment_shader, bool, false)
82	 DRI_CONF_DESC(en, "Enable limited ARB_fragment_shader support on 915/945.")
83      DRI_CONF_OPT_END
84
85   DRI_CONF_SECTION_END
86   DRI_CONF_SECTION_QUALITY
87      DRI_CONF_FORCE_S3TC_ENABLE(false)
88      DRI_CONF_ALLOW_LARGE_TEXTURES(2)
89   DRI_CONF_SECTION_END
90   DRI_CONF_SECTION_DEBUG
91     DRI_CONF_NO_RAST(false)
92     DRI_CONF_ALWAYS_FLUSH_BATCH(false)
93     DRI_CONF_ALWAYS_FLUSH_CACHE(false)
94
95      DRI_CONF_OPT_BEGIN(stub_occlusion_query, bool, false)
96	 DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
97      DRI_CONF_OPT_END
98   DRI_CONF_SECTION_END
99DRI_CONF_END;
100
101const GLuint __driNConfigOptions = 11;
102
103#ifdef USE_NEW_INTERFACE
104static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
105#endif /*USE_NEW_INTERFACE */
106
107/**
108 * Map all the memory regions described by the screen.
109 * \return GL_TRUE if success, GL_FALSE if error.
110 */
111GLboolean
112intelMapScreenRegions(__DRIscreen * sPriv)
113{
114   intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
115
116   if (0)
117      _mesa_printf("TEX 0x%08x ", intelScreen->tex.handle);
118   if (intelScreen->tex.size != 0) {
119      if (drmMap(sPriv->fd,
120		 intelScreen->tex.handle,
121		 intelScreen->tex.size,
122		 (drmAddress *) & intelScreen->tex.map) != 0) {
123	 intelUnmapScreenRegions(intelScreen);
124	 return GL_FALSE;
125      }
126   }
127
128   return GL_TRUE;
129}
130
131void
132intelUnmapScreenRegions(intelScreenPrivate * intelScreen)
133{
134   if (intelScreen->tex.map) {
135      drmUnmap(intelScreen->tex.map, intelScreen->tex.size);
136      intelScreen->tex.map = NULL;
137   }
138}
139
140
141static void
142intelPrintDRIInfo(intelScreenPrivate * intelScreen,
143                  __DRIscreen * sPriv, I830DRIPtr gDRIPriv)
144{
145   fprintf(stderr, "*** Front size:   0x%x  offset: 0x%x  pitch: %d\n",
146           intelScreen->front.size, intelScreen->front.offset,
147           intelScreen->pitch);
148   fprintf(stderr, "*** Back size:    0x%x  offset: 0x%x  pitch: %d\n",
149           intelScreen->back.size, intelScreen->back.offset,
150           intelScreen->pitch);
151   fprintf(stderr, "*** Depth size:   0x%x  offset: 0x%x  pitch: %d\n",
152           intelScreen->depth.size, intelScreen->depth.offset,
153           intelScreen->pitch);
154   fprintf(stderr, "*** Texture size: 0x%x  offset: 0x%x\n",
155           intelScreen->tex.size, intelScreen->tex.offset);
156   fprintf(stderr, "*** Memory : 0x%x\n", gDRIPriv->mem);
157}
158
159
160static void
161intelPrintSAREA(const drm_i915_sarea_t * sarea)
162{
163   fprintf(stderr, "SAREA: sarea width %d  height %d\n", sarea->width,
164           sarea->height);
165   fprintf(stderr, "SAREA: pitch: %d\n", sarea->pitch);
166   fprintf(stderr,
167           "SAREA: front offset: 0x%08x  size: 0x%x  handle: 0x%x tiled: %d\n",
168           sarea->front_offset, sarea->front_size,
169           (unsigned) sarea->front_handle, sarea->front_tiled);
170   fprintf(stderr,
171           "SAREA: back  offset: 0x%08x  size: 0x%x  handle: 0x%x tiled: %d\n",
172           sarea->back_offset, sarea->back_size,
173           (unsigned) sarea->back_handle, sarea->back_tiled);
174   fprintf(stderr, "SAREA: depth offset: 0x%08x  size: 0x%x  handle: 0x%x tiled: %d\n",
175           sarea->depth_offset, sarea->depth_size,
176           (unsigned) sarea->depth_handle, sarea->depth_tiled);
177   fprintf(stderr, "SAREA: tex   offset: 0x%08x  size: 0x%x  handle: 0x%x\n",
178           sarea->tex_offset, sarea->tex_size, (unsigned) sarea->tex_handle);
179}
180
181
182/**
183 * A number of the screen parameters are obtained/computed from
184 * information in the SAREA.  This function updates those parameters.
185 */
186static void
187intelUpdateScreenFromSAREA(intelScreenPrivate * intelScreen,
188                           drm_i915_sarea_t * sarea)
189{
190   intelScreen->width = sarea->width;
191   intelScreen->height = sarea->height;
192   intelScreen->pitch = sarea->pitch;
193
194   intelScreen->front.offset = sarea->front_offset;
195   intelScreen->front.handle = sarea->front_handle;
196   intelScreen->front.size = sarea->front_size;
197   intelScreen->front.tiled = sarea->front_tiled;
198
199   intelScreen->back.offset = sarea->back_offset;
200   intelScreen->back.handle = sarea->back_handle;
201   intelScreen->back.size = sarea->back_size;
202   intelScreen->back.tiled = sarea->back_tiled;
203
204   intelScreen->depth.offset = sarea->depth_offset;
205   intelScreen->depth.handle = sarea->depth_handle;
206   intelScreen->depth.size = sarea->depth_size;
207   intelScreen->depth.tiled = sarea->depth_tiled;
208
209   if (intelScreen->driScrnPriv->ddx_version.minor >= 9) {
210      intelScreen->front.bo_handle = sarea->front_bo_handle;
211      intelScreen->back.bo_handle = sarea->back_bo_handle;
212      intelScreen->depth.bo_handle = sarea->depth_bo_handle;
213   } else {
214      intelScreen->front.bo_handle = -1;
215      intelScreen->back.bo_handle = -1;
216      intelScreen->depth.bo_handle = -1;
217   }
218
219   intelScreen->tex.offset = sarea->tex_offset;
220   intelScreen->logTextureGranularity = sarea->log_tex_granularity;
221   intelScreen->tex.handle = sarea->tex_handle;
222   intelScreen->tex.size = sarea->tex_size;
223
224   if (0)
225      intelPrintSAREA(sarea);
226}
227
228static const __DRItexOffsetExtension intelTexOffsetExtension = {
229   { __DRI_TEX_OFFSET },
230   intelSetTexOffset,
231};
232
233static const __DRItexBufferExtension intelTexBufferExtension = {
234    { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
235   intelSetTexBuffer,
236   intelSetTexBuffer2,
237};
238
239static const __DRIextension *intelScreenExtensions[] = {
240    &driReadDrawableExtension,
241    &driCopySubBufferExtension.base,
242    &driSwapControlExtension.base,
243    &driFrameTrackingExtension.base,
244    &driMediaStreamCounterExtension.base,
245    &intelTexOffsetExtension.base,
246    &intelTexBufferExtension.base,
247    NULL
248};
249
250static GLboolean
251intel_get_param(__DRIscreen *psp, int param, int *value)
252{
253   int ret;
254   struct drm_i915_getparam gp;
255
256   gp.param = param;
257   gp.value = value;
258
259   ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
260   if (ret) {
261      _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
262      return GL_FALSE;
263   }
264
265   return GL_TRUE;
266}
267
268static GLboolean intelInitDriver(__DRIscreen *sPriv)
269{
270   intelScreenPrivate *intelScreen;
271   I830DRIPtr gDRIPriv = (I830DRIPtr) sPriv->pDevPriv;
272   drm_i915_sarea_t *sarea;
273
274   if (sPriv->devPrivSize != sizeof(I830DRIRec)) {
275      fprintf(stderr,
276              "\nERROR!  sizeof(I830DRIRec) does not match passed size from device driver\n");
277      return GL_FALSE;
278   }
279
280   /* Allocate the private area */
281   intelScreen = (intelScreenPrivate *) CALLOC(sizeof(intelScreenPrivate));
282   if (!intelScreen) {
283      fprintf(stderr, "\nERROR!  Allocating private area failed\n");
284      return GL_FALSE;
285   }
286   /* parse information in __driConfigOptions */
287   driParseOptionInfo(&intelScreen->optionCache,
288                      __driConfigOptions, __driNConfigOptions);
289
290   intelScreen->driScrnPriv = sPriv;
291   sPriv->private = (void *) intelScreen;
292   sarea = (drm_i915_sarea_t *)
293      (((GLubyte *) sPriv->pSAREA) + gDRIPriv->sarea_priv_offset);
294   intelScreen->sarea = sarea;
295
296   intelScreen->deviceID = gDRIPriv->deviceID;
297
298   intelUpdateScreenFromSAREA(intelScreen, sarea);
299
300   if (!intelMapScreenRegions(sPriv)) {
301      fprintf(stderr, "\nERROR!  mapping regions\n");
302      _mesa_free(intelScreen);
303      sPriv->private = NULL;
304      return GL_FALSE;
305   }
306
307   if (0)
308      intelPrintDRIInfo(intelScreen, sPriv, gDRIPriv);
309
310   intelScreen->drmMinor = sPriv->drm_version.minor;
311
312   /* Determine if IRQs are active? */
313   if (!intel_get_param(sPriv, I915_PARAM_IRQ_ACTIVE,
314			&intelScreen->irq_active))
315      return GL_FALSE;
316
317   sPriv->extensions = intelScreenExtensions;
318
319   return GL_TRUE;
320}
321
322
323static void
324intelDestroyScreen(__DRIscreen * sPriv)
325{
326   intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
327
328   dri_bufmgr_destroy(intelScreen->bufmgr);
329   intelUnmapScreenRegions(intelScreen);
330   driDestroyOptionInfo(&intelScreen->optionCache);
331
332   FREE(intelScreen);
333   sPriv->private = NULL;
334}
335
336
337/**
338 * This is called when we need to set up GL rendering to a new X window.
339 */
340static GLboolean
341intelCreateBuffer(__DRIscreen * driScrnPriv,
342                  __DRIdrawable * driDrawPriv,
343                  const __GLcontextModes * mesaVis, GLboolean isPixmap)
344{
345   if (isPixmap) {
346      return GL_FALSE;          /* not implemented */
347   }
348   else {
349      GLboolean swStencil = (mesaVis->stencilBits > 0 &&
350                             mesaVis->depthBits != 24);
351      gl_format rgbFormat;
352
353      struct intel_framebuffer *intel_fb = CALLOC_STRUCT(intel_framebuffer);
354
355      if (!intel_fb)
356	 return GL_FALSE;
357
358      _mesa_initialize_framebuffer(&intel_fb->Base, mesaVis);
359
360      if (mesaVis->redBits == 5)
361	 rgbFormat = MESA_FORMAT_RGB565;
362      else if (mesaVis->alphaBits == 0)
363	 rgbFormat = MESA_FORMAT_XRGB8888;
364      else
365	 rgbFormat = MESA_FORMAT_ARGB8888;
366
367      /* setup the hardware-based renderbuffers */
368      intel_fb->color_rb[0] = intel_create_renderbuffer(rgbFormat);
369      _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_FRONT_LEFT,
370			     &intel_fb->color_rb[0]->Base);
371
372      if (mesaVis->doubleBufferMode) {
373	 intel_fb->color_rb[1] = intel_create_renderbuffer(rgbFormat);
374
375         _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_BACK_LEFT,
376				&intel_fb->color_rb[1]->Base);
377
378      }
379
380      if (mesaVis->depthBits == 24) {
381	 if (mesaVis->stencilBits == 8) {
382	    /* combined depth/stencil buffer */
383	    struct intel_renderbuffer *depthStencilRb
384	       = intel_create_renderbuffer(MESA_FORMAT_S8_Z24);
385	    /* note: bind RB to two attachment points */
386	    _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_DEPTH,
387				   &depthStencilRb->Base);
388	    _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_STENCIL,
389				   &depthStencilRb->Base);
390	 } else {
391	    struct intel_renderbuffer *depthRb
392	       = intel_create_renderbuffer(MESA_FORMAT_X8_Z24);
393	    _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_DEPTH,
394				   &depthRb->Base);
395	 }
396      }
397      else if (mesaVis->depthBits == 16) {
398         /* just 16-bit depth buffer, no hw stencil */
399         struct intel_renderbuffer *depthRb
400	    = intel_create_renderbuffer(MESA_FORMAT_Z16);
401         _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_DEPTH, &depthRb->Base);
402      }
403
404      /* now add any/all software-based renderbuffers we may need */
405      _mesa_add_soft_renderbuffers(&intel_fb->Base,
406                                   GL_FALSE, /* never sw color */
407                                   GL_FALSE, /* never sw depth */
408                                   swStencil, mesaVis->accumRedBits > 0,
409                                   GL_FALSE, /* never sw alpha */
410                                   GL_FALSE  /* never sw aux */ );
411      driDrawPriv->driverPrivate = (void *) intel_fb;
412
413      return GL_TRUE;
414   }
415}
416
417static void
418intelDestroyBuffer(__DRIdrawable * driDrawPriv)
419{
420   struct intel_framebuffer *intel_fb = driDrawPriv->driverPrivate;
421   struct intel_renderbuffer *depth_rb;
422   struct intel_renderbuffer *stencil_rb;
423
424   if (intel_fb) {
425      if (intel_fb->color_rb[0]) {
426         intel_renderbuffer_set_region(intel_fb->color_rb[0], NULL);
427      }
428
429      if (intel_fb->color_rb[1]) {
430         intel_renderbuffer_set_region(intel_fb->color_rb[1], NULL);
431      }
432
433      depth_rb = intel_get_renderbuffer(&intel_fb->Base, BUFFER_DEPTH);
434      if (depth_rb) {
435         intel_renderbuffer_set_region(depth_rb, NULL);
436      }
437
438      stencil_rb = intel_get_renderbuffer(&intel_fb->Base, BUFFER_STENCIL);
439      if (stencil_rb) {
440         intel_renderbuffer_set_region(stencil_rb, NULL);
441      }
442   }
443
444   _mesa_reference_framebuffer((GLframebuffer **)(&(driDrawPriv->driverPrivate)), NULL);
445}
446
447
448/**
449 * Get information about previous buffer swaps.
450 */
451static int
452intelGetSwapInfo(__DRIdrawable * dPriv, __DRIswapInfo * sInfo)
453{
454   struct intel_framebuffer *intel_fb;
455
456   if ((dPriv == NULL) || (dPriv->driverPrivate == NULL)
457       || (sInfo == NULL)) {
458      return -1;
459   }
460
461   intel_fb = dPriv->driverPrivate;
462   sInfo->swap_count = intel_fb->swap_count;
463   sInfo->swap_ust = intel_fb->swap_ust;
464   sInfo->swap_missed_count = intel_fb->swap_missed_count;
465
466   sInfo->swap_missed_usage = (sInfo->swap_missed_count != 0)
467      ? driCalculateSwapUsage(dPriv, 0, intel_fb->swap_missed_ust)
468      : 0.0;
469
470   return 0;
471}
472
473
474/* There are probably better ways to do this, such as an
475 * init-designated function to register chipids and createcontext
476 * functions.
477 */
478extern GLboolean i830CreateContext(const __GLcontextModes * mesaVis,
479                                   __DRIcontext * driContextPriv,
480                                   void *sharedContextPrivate);
481
482extern GLboolean i915CreateContext(const __GLcontextModes * mesaVis,
483                                   __DRIcontext * driContextPriv,
484                                   void *sharedContextPrivate);
485extern GLboolean brwCreateContext(const __GLcontextModes * mesaVis,
486				  __DRIcontext * driContextPriv,
487				  void *sharedContextPrivate);
488
489static GLboolean
490intelCreateContext(const __GLcontextModes * mesaVis,
491                   __DRIcontext * driContextPriv,
492                   void *sharedContextPrivate)
493{
494   __DRIscreen *sPriv = driContextPriv->driScreenPriv;
495   intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
496
497#ifdef I915
498   if (IS_9XX(intelScreen->deviceID)) {
499      if (!IS_965(intelScreen->deviceID)) {
500	 return i915CreateContext(mesaVis, driContextPriv,
501				  sharedContextPrivate);
502      }
503   } else {
504      intelScreen->no_vbo = GL_TRUE;
505      return i830CreateContext(mesaVis, driContextPriv, sharedContextPrivate);
506   }
507#else
508   if (IS_965(intelScreen->deviceID))
509      return brwCreateContext(mesaVis, driContextPriv, sharedContextPrivate);
510#endif
511   fprintf(stderr, "Unrecognized deviceID %x\n", intelScreen->deviceID);
512   return GL_FALSE;
513}
514
515
516static __DRIconfig **
517intelFillInModes(__DRIscreen *psp,
518		 unsigned pixel_bits, unsigned depth_bits,
519                 unsigned stencil_bits, GLboolean have_back_buffer)
520{
521   __DRIconfig **configs;
522   __GLcontextModes *m;
523   unsigned depth_buffer_factor;
524   unsigned back_buffer_factor;
525   int i;
526
527   /* GLX_SWAP_COPY_OML is only supported because the Intel driver doesn't
528    * support pageflipping at all.
529    */
530   static const GLenum back_buffer_modes[] = {
531      GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
532   };
533
534   uint8_t depth_bits_array[3];
535   uint8_t stencil_bits_array[3];
536   uint8_t msaa_samples_array[1];
537
538   depth_bits_array[0] = 0;
539   depth_bits_array[1] = depth_bits;
540   depth_bits_array[2] = depth_bits;
541
542   /* Just like with the accumulation buffer, always provide some modes
543    * with a stencil buffer.  It will be a sw fallback, but some apps won't
544    * care about that.
545    */
546   stencil_bits_array[0] = 0;
547   stencil_bits_array[1] = 0;
548   if (depth_bits == 24)
549      stencil_bits_array[1] = (stencil_bits == 0) ? 8 : stencil_bits;
550
551   stencil_bits_array[2] = (stencil_bits == 0) ? 8 : stencil_bits;
552
553   msaa_samples_array[0] = 0;
554
555   depth_buffer_factor = ((depth_bits != 0) || (stencil_bits != 0)) ? 3 : 1;
556   back_buffer_factor = (have_back_buffer) ? 3 : 1;
557
558   if (pixel_bits == 16) {
559      configs = driCreateConfigs(GL_RGB, GL_UNSIGNED_SHORT_5_6_5,
560				 depth_bits_array, stencil_bits_array,
561				 depth_buffer_factor, back_buffer_modes,
562				 back_buffer_factor,
563				 msaa_samples_array, 1);
564   }
565   else {
566      __DRIconfig **configs_a8r8g8b8;
567      __DRIconfig **configs_x8r8g8b8;
568
569      configs_a8r8g8b8 = driCreateConfigs(GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV,
570					  depth_bits_array,
571					  stencil_bits_array,
572					  depth_buffer_factor,
573					  back_buffer_modes,
574					  back_buffer_factor,
575					  msaa_samples_array, 1);
576      configs_x8r8g8b8 = driCreateConfigs(GL_BGR, GL_UNSIGNED_INT_8_8_8_8_REV,
577					  depth_bits_array,
578					  stencil_bits_array,
579					  depth_buffer_factor,
580					  back_buffer_modes,
581					  back_buffer_factor,
582					  msaa_samples_array, 1);
583      configs = driConcatConfigs(configs_a8r8g8b8, configs_x8r8g8b8);
584   }
585
586   if (configs == NULL) {
587    fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
588              __LINE__);
589      return NULL;
590   }
591
592   /* Mark the visual as slow if there are "fake" stencil bits.
593    */
594   for (i = 0; configs[i]; i++) {
595      m = &configs[i]->modes;
596      if ((m->stencilBits != 0) && (m->stencilBits != stencil_bits)) {
597         m->visualRating = GLX_SLOW_CONFIG;
598      }
599   }
600
601   return configs;
602}
603
604static GLboolean
605intel_init_bufmgr(intelScreenPrivate *intelScreen)
606{
607   int gem_kernel = 0;
608   struct drm_i915_getparam gp;
609   __DRIscreen *spriv = intelScreen->driScrnPriv;
610   int num_fences = 0;
611
612   intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
613
614   gp.param = I915_PARAM_HAS_GEM;
615   gp.value = &gem_kernel;
616
617   (void) drmCommandWriteRead(spriv->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
618
619   /* If we've got a new enough DDX that's initializing GEM and giving us
620    * object handles for the shared buffers, use that.
621    */
622   if (!intelScreen->driScrnPriv->dri2.enabled &&
623       intelScreen->driScrnPriv->ddx_version.minor < 9) {
624      fprintf(stderr, "[%s:%u] Error initializing GEM.\n",
625	      __func__, __LINE__);
626      return GL_FALSE;
627   }
628
629   intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
630   /* Otherwise, use the classic buffer manager. */
631   if (intelScreen->bufmgr == NULL) {
632      fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
633	      __func__, __LINE__);
634      return GL_FALSE;
635   }
636
637   if (intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences))
638      intelScreen->kernel_exec_fencing = !!num_fences;
639   else
640      intelScreen->kernel_exec_fencing = GL_FALSE;
641
642   return GL_TRUE;
643}
644
645/**
646 * This is the driver specific part of the createNewScreen entry point.
647 * Called when using legacy DRI.
648 *
649 * \todo maybe fold this into intelInitDriver
650 *
651 * \return the __GLcontextModes supported by this driver
652 */
653static const __DRIconfig **intelInitScreen(__DRIscreen *psp)
654{
655   intelScreenPrivate *intelScreen;
656#ifdef I915
657   static const __DRIversion ddx_expected = { 1, 5, 0 };
658#else
659   static const __DRIversion ddx_expected = { 1, 6, 0 };
660#endif
661   static const __DRIversion dri_expected = { 4, 0, 0 };
662   static const __DRIversion drm_expected = { 1, 5, 0 };
663   I830DRIPtr dri_priv = (I830DRIPtr) psp->pDevPriv;
664
665   if (!driCheckDriDdxDrmVersions2("i915",
666                                   &psp->dri_version, &dri_expected,
667                                   &psp->ddx_version, &ddx_expected,
668                                   &psp->drm_version, &drm_expected)) {
669      return NULL;
670   }
671
672   if (!intelInitDriver(psp))
673       return NULL;
674
675   psp->extensions = intelScreenExtensions;
676
677   intelScreen = psp->private;
678   if (!intel_init_bufmgr(intelScreen))
679       return GL_FALSE;
680
681   return (const __DRIconfig **)
682       intelFillInModes(psp, dri_priv->cpp * 8,
683			(dri_priv->cpp == 2) ? 16 : 24,
684			(dri_priv->cpp == 2) ? 0  : 8, 1);
685}
686
687struct intel_context *intelScreenContext(intelScreenPrivate *intelScreen)
688{
689  /*
690   * This should probably change to have the screen allocate a dummy
691   * context at screen creation. For now just use the current context.
692   */
693
694  GET_CURRENT_CONTEXT(ctx);
695  if (ctx == NULL) {
696     _mesa_problem(NULL, "No current context in intelScreenContext\n");
697     return NULL;
698  }
699  return intel_context(ctx);
700}
701
702/**
703 * This is the driver specific part of the createNewScreen entry point.
704 * Called when using DRI2.
705 *
706 * \return the __GLcontextModes supported by this driver
707 */
708static const
709__DRIconfig **intelInitScreen2(__DRIscreen *psp)
710{
711   intelScreenPrivate *intelScreen;
712   GLenum fb_format[3];
713   GLenum fb_type[3];
714   /* GLX_SWAP_COPY_OML is only supported because the Intel driver doesn't
715    * support pageflipping at all.
716    */
717   static const GLenum back_buffer_modes[] = {
718      GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
719   };
720   uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
721   int color;
722   __DRIconfig **configs = NULL;
723
724   /* Allocate the private area */
725   intelScreen = (intelScreenPrivate *) CALLOC(sizeof(intelScreenPrivate));
726   if (!intelScreen) {
727      fprintf(stderr, "\nERROR!  Allocating private area failed\n");
728      return GL_FALSE;
729   }
730   /* parse information in __driConfigOptions */
731   driParseOptionInfo(&intelScreen->optionCache,
732                      __driConfigOptions, __driNConfigOptions);
733
734   intelScreen->driScrnPriv = psp;
735   psp->private = (void *) intelScreen;
736
737   intelScreen->drmMinor = psp->drm_version.minor;
738
739   /* Determine chipset ID */
740   if (!intel_get_param(psp, I915_PARAM_CHIPSET_ID,
741			&intelScreen->deviceID))
742      return GL_FALSE;
743
744   if (!intel_init_bufmgr(intelScreen))
745       return GL_FALSE;
746
747   intelScreen->irq_active = 1;
748   psp->extensions = intelScreenExtensions;
749
750   depth_bits[0] = 0;
751   stencil_bits[0] = 0;
752   depth_bits[1] = 16;
753   stencil_bits[1] = 0;
754   depth_bits[2] = 24;
755   stencil_bits[2] = 0;
756   depth_bits[3] = 24;
757   stencil_bits[3] = 8;
758
759   msaa_samples_array[0] = 0;
760
761   fb_format[0] = GL_RGB;
762   fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
763
764   fb_format[1] = GL_BGR;
765   fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
766
767   fb_format[2] = GL_BGRA;
768   fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
769
770   depth_bits[0] = 0;
771   stencil_bits[0] = 0;
772
773   for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
774      __DRIconfig **new_configs;
775      int depth_factor;
776
777      /* With DRI2 right now, GetBuffers always returns a depth/stencil buffer
778       * with the same cpp as the drawable.  So we can't support depth cpp !=
779       * color cpp currently.
780       */
781      if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
782	 depth_bits[1] = 16;
783	 stencil_bits[1] = 0;
784
785	 depth_factor = 2;
786      } else {
787	 depth_bits[1] = 24;
788	 stencil_bits[1] = 0;
789	 depth_bits[2] = 24;
790	 stencil_bits[2] = 8;
791
792	 depth_factor = 3;
793      }
794      new_configs = driCreateConfigs(fb_format[color], fb_type[color],
795				     depth_bits,
796				     stencil_bits,
797				     depth_factor,
798				     back_buffer_modes,
799				     ARRAY_SIZE(back_buffer_modes),
800				     msaa_samples_array,
801				     ARRAY_SIZE(msaa_samples_array));
802      if (configs == NULL)
803	 configs = new_configs;
804      else
805	 configs = driConcatConfigs(configs, new_configs);
806   }
807
808   if (configs == NULL) {
809      fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
810              __LINE__);
811      return NULL;
812   }
813
814   return (const __DRIconfig **)configs;
815}
816
817const struct __DriverAPIRec driDriverAPI = {
818   .InitScreen		 = intelInitScreen,
819   .DestroyScreen	 = intelDestroyScreen,
820   .CreateContext	 = intelCreateContext,
821   .DestroyContext	 = intelDestroyContext,
822   .CreateBuffer	 = intelCreateBuffer,
823   .DestroyBuffer	 = intelDestroyBuffer,
824   .SwapBuffers		 = intelSwapBuffers,
825   .MakeCurrent		 = intelMakeCurrent,
826   .UnbindContext	 = intelUnbindContext,
827   .GetSwapInfo		 = intelGetSwapInfo,
828   .GetDrawableMSC	 = driDrawableGetMSC32,
829   .WaitForMSC		 = driWaitForMSC32,
830   .CopySubBuffer	 = intelCopySubBuffer,
831
832   .InitScreen2		 = intelInitScreen2,
833};
834