intel_screen.c revision 7c50d29f7ced3d60e52ee0146d982b49ea421de2 
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(__DRIscreenPrivate * 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                  __DRIscreenPrivate * 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 void
240intelDRI2Flush(__DRIdrawable *drawable)
241{
242   struct intel_context *intel = drawable->driContextPriv->driverPrivate;
243
244   if (intel->gen < 4)
245      INTEL_FIREVERTICES(intel);
246
247   if (intel->batch->map != intel->batch->ptr)
248      intel_batchbuffer_flush(intel->batch);
249}
250
251static void
252intelDRI2FlushInvalidate(__DRIdrawable *drawable)
253{
254   intelDRI2Flush(drawable);
255   drawable->validBuffers = GL_FALSE;
256}
257
258static const struct __DRI2flushExtensionRec intelFlushExtension = {
259    { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
260    intelDRI2Flush,
261    intelDRI2FlushInvalidate,
262};
263
264static const __DRIextension *intelScreenExtensions[] = {
265    &driReadDrawableExtension,
266    &driCopySubBufferExtension.base,
267    &driSwapControlExtension.base,
268    &driFrameTrackingExtension.base,
269    &driMediaStreamCounterExtension.base,
270    &intelTexOffsetExtension.base,
271    &intelTexBufferExtension.base,
272    &intelFlushExtension.base,
273    NULL
274};
275
276static GLboolean
277intel_get_param(__DRIscreenPrivate *psp, int param, int *value)
278{
279   int ret;
280   struct drm_i915_getparam gp;
281
282   gp.param = param;
283   gp.value = value;
284
285   ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
286   if (ret) {
287      _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
288      return GL_FALSE;
289   }
290
291   return GL_TRUE;
292}
293
294static GLboolean intelInitDriver(__DRIscreenPrivate *sPriv)
295{
296   intelScreenPrivate *intelScreen;
297   I830DRIPtr gDRIPriv = (I830DRIPtr) sPriv->pDevPriv;
298   drm_i915_sarea_t *sarea;
299
300   if (sPriv->devPrivSize != sizeof(I830DRIRec)) {
301      fprintf(stderr,
302              "\nERROR!  sizeof(I830DRIRec) does not match passed size from device driver\n");
303      return GL_FALSE;
304   }
305
306   /* Allocate the private area */
307   intelScreen = (intelScreenPrivate *) CALLOC(sizeof(intelScreenPrivate));
308   if (!intelScreen) {
309      fprintf(stderr, "\nERROR!  Allocating private area failed\n");
310      return GL_FALSE;
311   }
312   /* parse information in __driConfigOptions */
313   driParseOptionInfo(&intelScreen->optionCache,
314                      __driConfigOptions, __driNConfigOptions);
315
316   intelScreen->driScrnPriv = sPriv;
317   sPriv->private = (void *) intelScreen;
318   sarea = (drm_i915_sarea_t *)
319      (((GLubyte *) sPriv->pSAREA) + gDRIPriv->sarea_priv_offset);
320   intelScreen->sarea = sarea;
321
322   intelScreen->deviceID = gDRIPriv->deviceID;
323
324   intelUpdateScreenFromSAREA(intelScreen, sarea);
325
326   if (!intelMapScreenRegions(sPriv)) {
327      fprintf(stderr, "\nERROR!  mapping regions\n");
328      _mesa_free(intelScreen);
329      sPriv->private = NULL;
330      return GL_FALSE;
331   }
332
333   if (0)
334      intelPrintDRIInfo(intelScreen, sPriv, gDRIPriv);
335
336   intelScreen->drmMinor = sPriv->drm_version.minor;
337
338   /* Determine if IRQs are active? */
339   if (!intel_get_param(sPriv, I915_PARAM_IRQ_ACTIVE,
340			&intelScreen->irq_active))
341      return GL_FALSE;
342
343   sPriv->extensions = intelScreenExtensions;
344
345   return GL_TRUE;
346}
347
348
349static void
350intelDestroyScreen(__DRIscreenPrivate * sPriv)
351{
352   intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
353
354   dri_bufmgr_destroy(intelScreen->bufmgr);
355   intelUnmapScreenRegions(intelScreen);
356   driDestroyOptionInfo(&intelScreen->optionCache);
357
358   FREE(intelScreen);
359   sPriv->private = NULL;
360}
361
362
363/**
364 * This is called when we need to set up GL rendering to a new X window.
365 */
366static GLboolean
367intelCreateBuffer(__DRIscreenPrivate * driScrnPriv,
368                  __DRIdrawablePrivate * driDrawPriv,
369                  const __GLcontextModes * mesaVis, GLboolean isPixmap)
370{
371   if (isPixmap) {
372      return GL_FALSE;          /* not implemented */
373   }
374   else {
375      GLboolean swStencil = (mesaVis->stencilBits > 0 &&
376                             mesaVis->depthBits != 24);
377      gl_format rgbFormat;
378
379      struct intel_framebuffer *intel_fb = CALLOC_STRUCT(intel_framebuffer);
380
381      if (!intel_fb)
382	 return GL_FALSE;
383
384      _mesa_initialize_framebuffer(&intel_fb->Base, mesaVis);
385
386      if (mesaVis->redBits == 5)
387	 rgbFormat = MESA_FORMAT_RGB565;
388      else if (mesaVis->alphaBits == 0)
389	 rgbFormat = MESA_FORMAT_XRGB8888;
390      else
391	 rgbFormat = MESA_FORMAT_ARGB8888;
392
393      /* setup the hardware-based renderbuffers */
394      intel_fb->color_rb[0] = intel_create_renderbuffer(rgbFormat);
395      _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_FRONT_LEFT,
396			     &intel_fb->color_rb[0]->Base);
397
398      if (mesaVis->doubleBufferMode) {
399	 intel_fb->color_rb[1] = intel_create_renderbuffer(rgbFormat);
400
401         _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_BACK_LEFT,
402				&intel_fb->color_rb[1]->Base);
403
404      }
405
406      if (mesaVis->depthBits == 24) {
407	 if (mesaVis->stencilBits == 8) {
408	    /* combined depth/stencil buffer */
409	    struct intel_renderbuffer *depthStencilRb
410	       = intel_create_renderbuffer(MESA_FORMAT_S8_Z24);
411	    /* note: bind RB to two attachment points */
412	    _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_DEPTH,
413				   &depthStencilRb->Base);
414	    _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_STENCIL,
415				   &depthStencilRb->Base);
416	 } else {
417	    struct intel_renderbuffer *depthRb
418	       = intel_create_renderbuffer(MESA_FORMAT_X8_Z24);
419	    _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_DEPTH,
420				   &depthRb->Base);
421	 }
422      }
423      else if (mesaVis->depthBits == 16) {
424         /* just 16-bit depth buffer, no hw stencil */
425         struct intel_renderbuffer *depthRb
426	    = intel_create_renderbuffer(MESA_FORMAT_Z16);
427         _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_DEPTH, &depthRb->Base);
428      }
429
430      /* now add any/all software-based renderbuffers we may need */
431      _mesa_add_soft_renderbuffers(&intel_fb->Base,
432                                   GL_FALSE, /* never sw color */
433                                   GL_FALSE, /* never sw depth */
434                                   swStencil, mesaVis->accumRedBits > 0,
435                                   GL_FALSE, /* never sw alpha */
436                                   GL_FALSE  /* never sw aux */ );
437      driDrawPriv->driverPrivate = (void *) intel_fb;
438
439      return GL_TRUE;
440   }
441}
442
443static void
444intelDestroyBuffer(__DRIdrawablePrivate * driDrawPriv)
445{
446   struct intel_framebuffer *intel_fb = driDrawPriv->driverPrivate;
447   struct intel_renderbuffer *depth_rb;
448   struct intel_renderbuffer *stencil_rb;
449
450   if (intel_fb) {
451      if (intel_fb->color_rb[0]) {
452         intel_renderbuffer_set_region(intel_fb->color_rb[0], NULL);
453      }
454
455      if (intel_fb->color_rb[1]) {
456         intel_renderbuffer_set_region(intel_fb->color_rb[1], NULL);
457      }
458
459      depth_rb = intel_get_renderbuffer(&intel_fb->Base, BUFFER_DEPTH);
460      if (depth_rb) {
461         intel_renderbuffer_set_region(depth_rb, NULL);
462      }
463
464      stencil_rb = intel_get_renderbuffer(&intel_fb->Base, BUFFER_STENCIL);
465      if (stencil_rb) {
466         intel_renderbuffer_set_region(stencil_rb, NULL);
467      }
468   }
469
470   _mesa_reference_framebuffer((GLframebuffer **)(&(driDrawPriv->driverPrivate)), NULL);
471}
472
473
474/**
475 * Get information about previous buffer swaps.
476 */
477static int
478intelGetSwapInfo(__DRIdrawablePrivate * dPriv, __DRIswapInfo * sInfo)
479{
480   struct intel_framebuffer *intel_fb;
481
482   if ((dPriv == NULL) || (dPriv->driverPrivate == NULL)
483       || (sInfo == NULL)) {
484      return -1;
485   }
486
487   intel_fb = dPriv->driverPrivate;
488   sInfo->swap_count = intel_fb->swap_count;
489   sInfo->swap_ust = intel_fb->swap_ust;
490   sInfo->swap_missed_count = intel_fb->swap_missed_count;
491
492   sInfo->swap_missed_usage = (sInfo->swap_missed_count != 0)
493      ? driCalculateSwapUsage(dPriv, 0, intel_fb->swap_missed_ust)
494      : 0.0;
495
496   return 0;
497}
498
499
500/* There are probably better ways to do this, such as an
501 * init-designated function to register chipids and createcontext
502 * functions.
503 */
504extern GLboolean i830CreateContext(const __GLcontextModes * mesaVis,
505                                   __DRIcontextPrivate * driContextPriv,
506                                   void *sharedContextPrivate);
507
508extern GLboolean i915CreateContext(const __GLcontextModes * mesaVis,
509                                   __DRIcontextPrivate * driContextPriv,
510                                   void *sharedContextPrivate);
511extern GLboolean brwCreateContext(const __GLcontextModes * mesaVis,
512				  __DRIcontextPrivate * driContextPriv,
513				  void *sharedContextPrivate);
514
515static GLboolean
516intelCreateContext(const __GLcontextModes * mesaVis,
517                   __DRIcontextPrivate * driContextPriv,
518                   void *sharedContextPrivate)
519{
520   __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
521   intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
522
523#ifdef I915
524   if (IS_9XX(intelScreen->deviceID)) {
525      if (!IS_965(intelScreen->deviceID)) {
526	 return i915CreateContext(mesaVis, driContextPriv,
527				  sharedContextPrivate);
528      }
529   } else {
530      intelScreen->no_vbo = GL_TRUE;
531      return i830CreateContext(mesaVis, driContextPriv, sharedContextPrivate);
532   }
533#else
534   if (IS_965(intelScreen->deviceID))
535      return brwCreateContext(mesaVis, driContextPriv, sharedContextPrivate);
536#endif
537   fprintf(stderr, "Unrecognized deviceID %x\n", intelScreen->deviceID);
538   return GL_FALSE;
539}
540
541
542static __DRIconfig **
543intelFillInModes(__DRIscreenPrivate *psp,
544		 unsigned pixel_bits, unsigned depth_bits,
545                 unsigned stencil_bits, GLboolean have_back_buffer)
546{
547   __DRIconfig **configs;
548   __GLcontextModes *m;
549   unsigned depth_buffer_factor;
550   unsigned back_buffer_factor;
551   int i;
552
553   static const GLenum back_buffer_modes[] = {
554       GLX_NONE, GLX_SWAP_UNDEFINED_OML,
555       GLX_SWAP_EXCHANGE_OML, GLX_SWAP_COPY_OML
556   };
557
558   uint8_t depth_bits_array[3];
559   uint8_t stencil_bits_array[3];
560   uint8_t msaa_samples_array[1];
561
562   depth_bits_array[0] = 0;
563   depth_bits_array[1] = depth_bits;
564   depth_bits_array[2] = depth_bits;
565
566   /* Just like with the accumulation buffer, always provide some modes
567    * with a stencil buffer.  It will be a sw fallback, but some apps won't
568    * care about that.
569    */
570   stencil_bits_array[0] = 0;
571   stencil_bits_array[1] = 0;
572   if (depth_bits == 24)
573      stencil_bits_array[1] = (stencil_bits == 0) ? 8 : stencil_bits;
574
575   stencil_bits_array[2] = (stencil_bits == 0) ? 8 : stencil_bits;
576
577   msaa_samples_array[0] = 0;
578
579   depth_buffer_factor = ((depth_bits != 0) || (stencil_bits != 0)) ? 3 : 1;
580   back_buffer_factor = (have_back_buffer) ? 3 : 1;
581
582   if (pixel_bits == 16) {
583      configs = driCreateConfigs(GL_RGB, GL_UNSIGNED_SHORT_5_6_5,
584				 depth_bits_array, stencil_bits_array,
585				 depth_buffer_factor, back_buffer_modes,
586				 back_buffer_factor,
587				 msaa_samples_array, 1);
588   }
589   else {
590      __DRIconfig **configs_a8r8g8b8;
591      __DRIconfig **configs_x8r8g8b8;
592
593      configs_a8r8g8b8 = driCreateConfigs(GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV,
594					  depth_bits_array,
595					  stencil_bits_array,
596					  depth_buffer_factor,
597					  back_buffer_modes,
598					  back_buffer_factor,
599					  msaa_samples_array, 1);
600      configs_x8r8g8b8 = driCreateConfigs(GL_BGR, GL_UNSIGNED_INT_8_8_8_8_REV,
601					  depth_bits_array,
602					  stencil_bits_array,
603					  depth_buffer_factor,
604					  back_buffer_modes,
605					  back_buffer_factor,
606					  msaa_samples_array, 1);
607      configs = driConcatConfigs(configs_a8r8g8b8, configs_x8r8g8b8);
608   }
609
610   if (configs == NULL) {
611    fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
612              __LINE__);
613      return NULL;
614   }
615
616   /* Mark the visual as slow if there are "fake" stencil bits.
617    */
618   for (i = 0; configs[i]; i++) {
619      m = &configs[i]->modes;
620      if ((m->stencilBits != 0) && (m->stencilBits != stencil_bits)) {
621         m->visualRating = GLX_SLOW_CONFIG;
622      }
623   }
624
625   return configs;
626}
627
628static GLboolean
629intel_init_bufmgr(intelScreenPrivate *intelScreen)
630{
631   int gem_kernel = 0;
632   struct drm_i915_getparam gp;
633   __DRIscreenPrivate *spriv = intelScreen->driScrnPriv;
634   int num_fences = 0;
635
636   intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
637
638   gp.param = I915_PARAM_HAS_GEM;
639   gp.value = &gem_kernel;
640
641   (void) drmCommandWriteRead(spriv->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
642
643   /* If we've got a new enough DDX that's initializing GEM and giving us
644    * object handles for the shared buffers, use that.
645    */
646   if (!intelScreen->driScrnPriv->dri2.enabled &&
647       intelScreen->driScrnPriv->ddx_version.minor < 9) {
648      fprintf(stderr, "[%s:%u] Error initializing GEM.\n",
649	      __func__, __LINE__);
650      return GL_FALSE;
651   }
652
653   intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
654   /* Otherwise, use the classic buffer manager. */
655   if (intelScreen->bufmgr == NULL) {
656      fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
657	      __func__, __LINE__);
658      return GL_FALSE;
659   }
660
661   if (intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences))
662      intelScreen->kernel_exec_fencing = !!num_fences;
663   else
664      intelScreen->kernel_exec_fencing = GL_FALSE;
665
666   return GL_TRUE;
667}
668
669/**
670 * This is the driver specific part of the createNewScreen entry point.
671 * Called when using legacy DRI.
672 *
673 * \todo maybe fold this into intelInitDriver
674 *
675 * \return the __GLcontextModes supported by this driver
676 */
677static const __DRIconfig **intelInitScreen(__DRIscreenPrivate *psp)
678{
679   intelScreenPrivate *intelScreen;
680#ifdef I915
681   static const __DRIversion ddx_expected = { 1, 5, 0 };
682#else
683   static const __DRIversion ddx_expected = { 1, 6, 0 };
684#endif
685   static const __DRIversion dri_expected = { 4, 0, 0 };
686   static const __DRIversion drm_expected = { 1, 5, 0 };
687   I830DRIPtr dri_priv = (I830DRIPtr) psp->pDevPriv;
688
689   if (!driCheckDriDdxDrmVersions2("i915",
690                                   &psp->dri_version, &dri_expected,
691                                   &psp->ddx_version, &ddx_expected,
692                                   &psp->drm_version, &drm_expected)) {
693      return NULL;
694   }
695
696   if (!intelInitDriver(psp))
697       return NULL;
698
699   psp->extensions = intelScreenExtensions;
700
701   intelScreen = psp->private;
702   if (!intel_init_bufmgr(intelScreen))
703       return GL_FALSE;
704
705   return (const __DRIconfig **)
706       intelFillInModes(psp, dri_priv->cpp * 8,
707			(dri_priv->cpp == 2) ? 16 : 24,
708			(dri_priv->cpp == 2) ? 0  : 8, 1);
709}
710
711struct intel_context *intelScreenContext(intelScreenPrivate *intelScreen)
712{
713  /*
714   * This should probably change to have the screen allocate a dummy
715   * context at screen creation. For now just use the current context.
716   */
717
718  GET_CURRENT_CONTEXT(ctx);
719  if (ctx == NULL) {
720     _mesa_problem(NULL, "No current context in intelScreenContext\n");
721     return NULL;
722  }
723  return intel_context(ctx);
724}
725
726/**
727 * This is the driver specific part of the createNewScreen entry point.
728 * Called when using DRI2.
729 *
730 * \return the __GLcontextModes supported by this driver
731 */
732static const
733__DRIconfig **intelInitScreen2(__DRIscreenPrivate *psp)
734{
735   intelScreenPrivate *intelScreen;
736   GLenum fb_format[3];
737   GLenum fb_type[3];
738
739   static const GLenum back_buffer_modes[] = {
740       GLX_NONE, GLX_SWAP_UNDEFINED_OML,
741       GLX_SWAP_EXCHANGE_OML, GLX_SWAP_COPY_OML
742   };
743   uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
744   int color;
745   __DRIconfig **configs = NULL;
746
747   /* Allocate the private area */
748   intelScreen = (intelScreenPrivate *) CALLOC(sizeof(intelScreenPrivate));
749   if (!intelScreen) {
750      fprintf(stderr, "\nERROR!  Allocating private area failed\n");
751      return GL_FALSE;
752   }
753   /* parse information in __driConfigOptions */
754   driParseOptionInfo(&intelScreen->optionCache,
755                      __driConfigOptions, __driNConfigOptions);
756
757   intelScreen->driScrnPriv = psp;
758   psp->private = (void *) intelScreen;
759
760   intelScreen->drmMinor = psp->drm_version.minor;
761
762   /* Determine chipset ID */
763   if (!intel_get_param(psp, I915_PARAM_CHIPSET_ID,
764			&intelScreen->deviceID))
765      return GL_FALSE;
766
767   if (!intel_init_bufmgr(intelScreen))
768       return GL_FALSE;
769
770   intelScreen->irq_active = 1;
771   psp->extensions = intelScreenExtensions;
772
773   depth_bits[0] = 0;
774   stencil_bits[0] = 0;
775   depth_bits[1] = 16;
776   stencil_bits[1] = 0;
777   depth_bits[2] = 24;
778   stencil_bits[2] = 0;
779   depth_bits[3] = 24;
780   stencil_bits[3] = 8;
781
782   msaa_samples_array[0] = 0;
783
784   fb_format[0] = GL_RGB;
785   fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
786
787   fb_format[1] = GL_BGR;
788   fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
789
790   fb_format[2] = GL_BGRA;
791   fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
792
793   depth_bits[0] = 0;
794   stencil_bits[0] = 0;
795
796   for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
797      __DRIconfig **new_configs;
798      int depth_factor;
799
800      /* With DRI2 right now, GetBuffers always returns a depth/stencil buffer
801       * with the same cpp as the drawable.  So we can't support depth cpp !=
802       * color cpp currently.
803       */
804      if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
805	 depth_bits[1] = 16;
806	 stencil_bits[1] = 0;
807
808	 depth_factor = 2;
809      } else {
810	 depth_bits[1] = 24;
811	 stencil_bits[1] = 0;
812	 depth_bits[2] = 24;
813	 stencil_bits[2] = 8;
814
815	 depth_factor = 3;
816      }
817      new_configs = driCreateConfigs(fb_format[color], fb_type[color],
818				     depth_bits,
819				     stencil_bits,
820				     depth_factor,
821				     back_buffer_modes,
822				     ARRAY_SIZE(back_buffer_modes),
823				     msaa_samples_array,
824				     ARRAY_SIZE(msaa_samples_array));
825      if (configs == NULL)
826	 configs = new_configs;
827      else
828	 configs = driConcatConfigs(configs, new_configs);
829   }
830
831   if (configs == NULL) {
832      fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
833              __LINE__);
834      return NULL;
835   }
836
837   return (const __DRIconfig **)configs;
838}
839
840const struct __DriverAPIRec driDriverAPI = {
841   .InitScreen		 = intelInitScreen,
842   .DestroyScreen	 = intelDestroyScreen,
843   .CreateContext	 = intelCreateContext,
844   .DestroyContext	 = intelDestroyContext,
845   .CreateBuffer	 = intelCreateBuffer,
846   .DestroyBuffer	 = intelDestroyBuffer,
847   .SwapBuffers		 = intelSwapBuffers,
848   .MakeCurrent		 = intelMakeCurrent,
849   .UnbindContext	 = intelUnbindContext,
850   .GetSwapInfo		 = intelGetSwapInfo,
851   .GetDrawableMSC	 = driDrawableGetMSC32,
852   .WaitForMSC		 = driWaitForMSC32,
853   .CopySubBuffer	 = intelCopySubBuffer,
854
855   .InitScreen2		 = intelInitScreen2,
856};
857