intel_screen.c revision 81aa5d717bd0098608e9cc292b316293800c7e11 
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_FTHROTTLE_MODE(DRI_CONF_FTHROTTLE_IRQS)
61      DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
62      /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
63       * DRI_CONF_BO_REUSE_ALL
64       */
65      DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
66	 DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
67	    DRI_CONF_ENUM(0, "Disable buffer object reuse")
68	    DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
69	 DRI_CONF_DESC_END
70      DRI_CONF_OPT_END
71
72#ifdef I915
73     DRI_CONF_TEXTURE_TILING(false)
74#else
75     DRI_CONF_TEXTURE_TILING(true)
76#endif
77
78      DRI_CONF_OPT_BEGIN(early_z, bool, false)
79	 DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
80      DRI_CONF_OPT_END
81
82      DRI_CONF_OPT_BEGIN(fragment_shader, bool, false)
83	 DRI_CONF_DESC(en, "Enable limited ARB_fragment_shader support on 915/945.")
84      DRI_CONF_OPT_END
85
86   DRI_CONF_SECTION_END
87   DRI_CONF_SECTION_QUALITY
88      DRI_CONF_FORCE_S3TC_ENABLE(false)
89      DRI_CONF_ALLOW_LARGE_TEXTURES(2)
90   DRI_CONF_SECTION_END
91   DRI_CONF_SECTION_DEBUG
92     DRI_CONF_NO_RAST(false)
93     DRI_CONF_ALWAYS_FLUSH_BATCH(false)
94     DRI_CONF_ALWAYS_FLUSH_CACHE(false)
95
96      DRI_CONF_OPT_BEGIN(stub_occlusion_query, bool, false)
97	 DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
98      DRI_CONF_OPT_END
99   DRI_CONF_SECTION_END
100DRI_CONF_END;
101
102const GLuint __driNConfigOptions = 12;
103
104#ifdef USE_NEW_INTERFACE
105static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
106#endif /*USE_NEW_INTERFACE */
107
108/**
109 * Map all the memory regions described by the screen.
110 * \return GL_TRUE if success, GL_FALSE if error.
111 */
112GLboolean
113intelMapScreenRegions(__DRIscreenPrivate * sPriv)
114{
115   intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
116
117   if (0)
118      _mesa_printf("TEX 0x%08x ", intelScreen->tex.handle);
119   if (intelScreen->tex.size != 0) {
120      if (drmMap(sPriv->fd,
121		 intelScreen->tex.handle,
122		 intelScreen->tex.size,
123		 (drmAddress *) & intelScreen->tex.map) != 0) {
124	 intelUnmapScreenRegions(intelScreen);
125	 return GL_FALSE;
126      }
127   }
128
129   return GL_TRUE;
130}
131
132void
133intelUnmapScreenRegions(intelScreenPrivate * intelScreen)
134{
135   if (intelScreen->tex.map) {
136      drmUnmap(intelScreen->tex.map, intelScreen->tex.size);
137      intelScreen->tex.map = NULL;
138   }
139}
140
141
142static void
143intelPrintDRIInfo(intelScreenPrivate * intelScreen,
144                  __DRIscreenPrivate * sPriv, I830DRIPtr gDRIPriv)
145{
146   fprintf(stderr, "*** Front size:   0x%x  offset: 0x%x  pitch: %d\n",
147           intelScreen->front.size, intelScreen->front.offset,
148           intelScreen->pitch);
149   fprintf(stderr, "*** Back size:    0x%x  offset: 0x%x  pitch: %d\n",
150           intelScreen->back.size, intelScreen->back.offset,
151           intelScreen->pitch);
152   fprintf(stderr, "*** Depth size:   0x%x  offset: 0x%x  pitch: %d\n",
153           intelScreen->depth.size, intelScreen->depth.offset,
154           intelScreen->pitch);
155   fprintf(stderr, "*** Texture size: 0x%x  offset: 0x%x\n",
156           intelScreen->tex.size, intelScreen->tex.offset);
157   fprintf(stderr, "*** Memory : 0x%x\n", gDRIPriv->mem);
158}
159
160
161static void
162intelPrintSAREA(const drm_i915_sarea_t * sarea)
163{
164   fprintf(stderr, "SAREA: sarea width %d  height %d\n", sarea->width,
165           sarea->height);
166   fprintf(stderr, "SAREA: pitch: %d\n", sarea->pitch);
167   fprintf(stderr,
168           "SAREA: front offset: 0x%08x  size: 0x%x  handle: 0x%x tiled: %d\n",
169           sarea->front_offset, sarea->front_size,
170           (unsigned) sarea->front_handle, sarea->front_tiled);
171   fprintf(stderr,
172           "SAREA: back  offset: 0x%08x  size: 0x%x  handle: 0x%x tiled: %d\n",
173           sarea->back_offset, sarea->back_size,
174           (unsigned) sarea->back_handle, sarea->back_tiled);
175   fprintf(stderr, "SAREA: depth offset: 0x%08x  size: 0x%x  handle: 0x%x tiled: %d\n",
176           sarea->depth_offset, sarea->depth_size,
177           (unsigned) sarea->depth_handle, sarea->depth_tiled);
178   fprintf(stderr, "SAREA: tex   offset: 0x%08x  size: 0x%x  handle: 0x%x\n",
179           sarea->tex_offset, sarea->tex_size, (unsigned) sarea->tex_handle);
180}
181
182
183/**
184 * A number of the screen parameters are obtained/computed from
185 * information in the SAREA.  This function updates those parameters.
186 */
187static void
188intelUpdateScreenFromSAREA(intelScreenPrivate * intelScreen,
189                           drm_i915_sarea_t * sarea)
190{
191   intelScreen->width = sarea->width;
192   intelScreen->height = sarea->height;
193   intelScreen->pitch = sarea->pitch;
194
195   intelScreen->front.offset = sarea->front_offset;
196   intelScreen->front.handle = sarea->front_handle;
197   intelScreen->front.size = sarea->front_size;
198   intelScreen->front.tiled = sarea->front_tiled;
199
200   intelScreen->back.offset = sarea->back_offset;
201   intelScreen->back.handle = sarea->back_handle;
202   intelScreen->back.size = sarea->back_size;
203   intelScreen->back.tiled = sarea->back_tiled;
204
205   intelScreen->depth.offset = sarea->depth_offset;
206   intelScreen->depth.handle = sarea->depth_handle;
207   intelScreen->depth.size = sarea->depth_size;
208   intelScreen->depth.tiled = sarea->depth_tiled;
209
210   if (intelScreen->driScrnPriv->ddx_version.minor >= 9) {
211      intelScreen->front.bo_handle = sarea->front_bo_handle;
212      intelScreen->back.bo_handle = sarea->back_bo_handle;
213      intelScreen->depth.bo_handle = sarea->depth_bo_handle;
214   } else {
215      intelScreen->front.bo_handle = -1;
216      intelScreen->back.bo_handle = -1;
217      intelScreen->depth.bo_handle = -1;
218   }
219
220   intelScreen->tex.offset = sarea->tex_offset;
221   intelScreen->logTextureGranularity = sarea->log_tex_granularity;
222   intelScreen->tex.handle = sarea->tex_handle;
223   intelScreen->tex.size = sarea->tex_size;
224
225   if (0)
226      intelPrintSAREA(sarea);
227}
228
229static const __DRItexOffsetExtension intelTexOffsetExtension = {
230   { __DRI_TEX_OFFSET },
231   intelSetTexOffset,
232};
233
234static const __DRItexBufferExtension intelTexBufferExtension = {
235    { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
236   intelSetTexBuffer,
237   intelSetTexBuffer2,
238};
239
240static const __DRIextension *intelScreenExtensions[] = {
241    &driReadDrawableExtension,
242    &driCopySubBufferExtension.base,
243    &driSwapControlExtension.base,
244    &driFrameTrackingExtension.base,
245    &driMediaStreamCounterExtension.base,
246    &intelTexOffsetExtension.base,
247    &intelTexBufferExtension.base,
248    NULL
249};
250
251static GLboolean
252intel_get_param(__DRIscreenPrivate *psp, int param, int *value)
253{
254   int ret;
255   struct drm_i915_getparam gp;
256
257   gp.param = param;
258   gp.value = value;
259
260   ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
261   if (ret) {
262      _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
263      return GL_FALSE;
264   }
265
266   return GL_TRUE;
267}
268
269static GLboolean intelInitDriver(__DRIscreenPrivate *sPriv)
270{
271   intelScreenPrivate *intelScreen;
272   I830DRIPtr gDRIPriv = (I830DRIPtr) sPriv->pDevPriv;
273   drm_i915_sarea_t *sarea;
274
275   if (sPriv->devPrivSize != sizeof(I830DRIRec)) {
276      fprintf(stderr,
277              "\nERROR!  sizeof(I830DRIRec) does not match passed size from device driver\n");
278      return GL_FALSE;
279   }
280
281   /* Allocate the private area */
282   intelScreen = (intelScreenPrivate *) CALLOC(sizeof(intelScreenPrivate));
283   if (!intelScreen) {
284      fprintf(stderr, "\nERROR!  Allocating private area failed\n");
285      return GL_FALSE;
286   }
287   /* parse information in __driConfigOptions */
288   driParseOptionInfo(&intelScreen->optionCache,
289                      __driConfigOptions, __driNConfigOptions);
290
291   intelScreen->driScrnPriv = sPriv;
292   sPriv->private = (void *) intelScreen;
293   sarea = (drm_i915_sarea_t *)
294      (((GLubyte *) sPriv->pSAREA) + gDRIPriv->sarea_priv_offset);
295   intelScreen->sarea = sarea;
296
297   intelScreen->deviceID = gDRIPriv->deviceID;
298
299   intelUpdateScreenFromSAREA(intelScreen, sarea);
300
301   if (!intelMapScreenRegions(sPriv)) {
302      fprintf(stderr, "\nERROR!  mapping regions\n");
303      _mesa_free(intelScreen);
304      sPriv->private = NULL;
305      return GL_FALSE;
306   }
307
308   if (0)
309      intelPrintDRIInfo(intelScreen, sPriv, gDRIPriv);
310
311   intelScreen->drmMinor = sPriv->drm_version.minor;
312
313   /* Determine if IRQs are active? */
314   if (!intel_get_param(sPriv, I915_PARAM_IRQ_ACTIVE,
315			&intelScreen->irq_active))
316      return GL_FALSE;
317
318   sPriv->extensions = intelScreenExtensions;
319
320   return GL_TRUE;
321}
322
323
324static void
325intelDestroyScreen(__DRIscreenPrivate * sPriv)
326{
327   intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
328
329   dri_bufmgr_destroy(intelScreen->bufmgr);
330   intelUnmapScreenRegions(intelScreen);
331   driDestroyOptionInfo(&intelScreen->optionCache);
332
333   FREE(intelScreen);
334   sPriv->private = NULL;
335}
336
337
338/**
339 * This is called when we need to set up GL rendering to a new X window.
340 */
341static GLboolean
342intelCreateBuffer(__DRIscreenPrivate * driScrnPriv,
343                  __DRIdrawablePrivate * driDrawPriv,
344                  const __GLcontextModes * mesaVis, GLboolean isPixmap)
345{
346   if (isPixmap) {
347      return GL_FALSE;          /* not implemented */
348   }
349   else {
350      GLboolean swStencil = (mesaVis->stencilBits > 0 &&
351                             mesaVis->depthBits != 24);
352      GLenum rgbFormat;
353
354      struct intel_framebuffer *intel_fb = CALLOC_STRUCT(intel_framebuffer);
355
356      if (!intel_fb)
357	 return GL_FALSE;
358
359      _mesa_initialize_framebuffer(&intel_fb->Base, mesaVis);
360
361      if (mesaVis->redBits == 5)
362	 rgbFormat = GL_RGB5;
363      else if (mesaVis->alphaBits == 0)
364	 rgbFormat = GL_RGB8;
365      else
366	 rgbFormat = GL_RGBA8;
367
368      /* setup the hardware-based renderbuffers */
369      intel_fb->color_rb[0] = intel_create_renderbuffer(rgbFormat);
370      _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_FRONT_LEFT,
371			     &intel_fb->color_rb[0]->Base);
372
373      if (mesaVis->doubleBufferMode) {
374	 intel_fb->color_rb[1] = intel_create_renderbuffer(rgbFormat);
375
376         _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_BACK_LEFT,
377				&intel_fb->color_rb[1]->Base);
378
379      }
380
381      if (mesaVis->depthBits == 24) {
382	 if (mesaVis->stencilBits == 8) {
383	    /* combined depth/stencil buffer */
384	    struct intel_renderbuffer *depthStencilRb
385	       = intel_create_renderbuffer(GL_DEPTH24_STENCIL8_EXT);
386	    /* note: bind RB to two attachment points */
387	    _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_DEPTH,
388				   &depthStencilRb->Base);
389	    _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_STENCIL,
390				   &depthStencilRb->Base);
391	 } else {
392	    struct intel_renderbuffer *depthRb
393	       = intel_create_renderbuffer(GL_DEPTH_COMPONENT24);
394	    _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_DEPTH,
395				   &depthRb->Base);
396	 }
397      }
398      else if (mesaVis->depthBits == 16) {
399         /* just 16-bit depth buffer, no hw stencil */
400         struct intel_renderbuffer *depthRb
401	    = intel_create_renderbuffer(GL_DEPTH_COMPONENT16);
402         _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_DEPTH, &depthRb->Base);
403      }
404
405      /* now add any/all software-based renderbuffers we may need */
406      _mesa_add_soft_renderbuffers(&intel_fb->Base,
407                                   GL_FALSE, /* never sw color */
408                                   GL_FALSE, /* never sw depth */
409                                   swStencil, mesaVis->accumRedBits > 0,
410                                   GL_FALSE, /* never sw alpha */
411                                   GL_FALSE  /* never sw aux */ );
412      driDrawPriv->driverPrivate = (void *) intel_fb;
413
414      return GL_TRUE;
415   }
416}
417
418static void
419intelDestroyBuffer(__DRIdrawablePrivate * driDrawPriv)
420{
421   struct intel_framebuffer *intel_fb = driDrawPriv->driverPrivate;
422   struct intel_renderbuffer *depth_rb;
423   struct intel_renderbuffer *stencil_rb;
424
425   if (intel_fb) {
426      if (intel_fb->color_rb[0]) {
427         intel_renderbuffer_set_region(intel_fb->color_rb[0], NULL);
428      }
429
430      if (intel_fb->color_rb[1]) {
431         intel_renderbuffer_set_region(intel_fb->color_rb[1], NULL);
432      }
433
434      depth_rb = intel_get_renderbuffer(&intel_fb->Base, BUFFER_DEPTH);
435      if (depth_rb) {
436         intel_renderbuffer_set_region(depth_rb, NULL);
437      }
438
439      stencil_rb = intel_get_renderbuffer(&intel_fb->Base, BUFFER_STENCIL);
440      if (stencil_rb) {
441         intel_renderbuffer_set_region(stencil_rb, NULL);
442      }
443   }
444
445   _mesa_reference_framebuffer((GLframebuffer **)(&(driDrawPriv->driverPrivate)), NULL);
446}
447
448
449/**
450 * Get information about previous buffer swaps.
451 */
452static int
453intelGetSwapInfo(__DRIdrawablePrivate * dPriv, __DRIswapInfo * sInfo)
454{
455   struct intel_framebuffer *intel_fb;
456
457   if ((dPriv == NULL) || (dPriv->driverPrivate == NULL)
458       || (sInfo == NULL)) {
459      return -1;
460   }
461
462   intel_fb = dPriv->driverPrivate;
463   sInfo->swap_count = intel_fb->swap_count;
464   sInfo->swap_ust = intel_fb->swap_ust;
465   sInfo->swap_missed_count = intel_fb->swap_missed_count;
466
467   sInfo->swap_missed_usage = (sInfo->swap_missed_count != 0)
468      ? driCalculateSwapUsage(dPriv, 0, intel_fb->swap_missed_ust)
469      : 0.0;
470
471   return 0;
472}
473
474
475/* There are probably better ways to do this, such as an
476 * init-designated function to register chipids and createcontext
477 * functions.
478 */
479extern GLboolean i830CreateContext(const __GLcontextModes * mesaVis,
480                                   __DRIcontextPrivate * driContextPriv,
481                                   void *sharedContextPrivate);
482
483extern GLboolean i915CreateContext(const __GLcontextModes * mesaVis,
484                                   __DRIcontextPrivate * driContextPriv,
485                                   void *sharedContextPrivate);
486extern GLboolean brwCreateContext(const __GLcontextModes * mesaVis,
487				  __DRIcontextPrivate * driContextPriv,
488				  void *sharedContextPrivate);
489
490static GLboolean
491intelCreateContext(const __GLcontextModes * mesaVis,
492                   __DRIcontextPrivate * driContextPriv,
493                   void *sharedContextPrivate)
494{
495   __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
496   intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
497
498#ifdef I915
499   if (IS_9XX(intelScreen->deviceID)) {
500      if (!IS_965(intelScreen->deviceID)) {
501	 return i915CreateContext(mesaVis, driContextPriv,
502				  sharedContextPrivate);
503      }
504   } else {
505      intelScreen->no_vbo = GL_TRUE;
506      return i830CreateContext(mesaVis, driContextPriv, sharedContextPrivate);
507   }
508#else
509   if (IS_965(intelScreen->deviceID))
510      return brwCreateContext(mesaVis, driContextPriv, sharedContextPrivate);
511#endif
512   fprintf(stderr, "Unrecognized deviceID %x\n", intelScreen->deviceID);
513   return GL_FALSE;
514}
515
516
517static __DRIconfig **
518intelFillInModes(__DRIscreenPrivate *psp,
519		 unsigned pixel_bits, unsigned depth_bits,
520                 unsigned stencil_bits, GLboolean have_back_buffer)
521{
522   __DRIconfig **configs;
523   __GLcontextModes *m;
524   unsigned depth_buffer_factor;
525   unsigned back_buffer_factor;
526   int i;
527
528   /* GLX_SWAP_COPY_OML is only supported because the Intel driver doesn't
529    * support pageflipping at all.
530    */
531   static const GLenum back_buffer_modes[] = {
532      GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
533   };
534
535   uint8_t depth_bits_array[3];
536   uint8_t stencil_bits_array[3];
537   uint8_t msaa_samples_array[1];
538
539   depth_bits_array[0] = 0;
540   depth_bits_array[1] = depth_bits;
541   depth_bits_array[2] = depth_bits;
542
543   /* Just like with the accumulation buffer, always provide some modes
544    * with a stencil buffer.  It will be a sw fallback, but some apps won't
545    * care about that.
546    */
547   stencil_bits_array[0] = 0;
548   stencil_bits_array[1] = 0;
549   if (depth_bits == 24)
550      stencil_bits_array[1] = (stencil_bits == 0) ? 8 : stencil_bits;
551
552   stencil_bits_array[2] = (stencil_bits == 0) ? 8 : stencil_bits;
553
554   msaa_samples_array[0] = 0;
555
556   depth_buffer_factor = ((depth_bits != 0) || (stencil_bits != 0)) ? 3 : 1;
557   back_buffer_factor = (have_back_buffer) ? 3 : 1;
558
559   if (pixel_bits == 16) {
560      configs = driCreateConfigs(GL_RGB, GL_UNSIGNED_SHORT_5_6_5,
561				 depth_bits_array, stencil_bits_array,
562				 depth_buffer_factor, back_buffer_modes,
563				 back_buffer_factor,
564				 msaa_samples_array, 1);
565   }
566   else {
567      __DRIconfig **configs_a8r8g8b8;
568      __DRIconfig **configs_x8r8g8b8;
569
570      configs_a8r8g8b8 = driCreateConfigs(GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV,
571					  depth_bits_array,
572					  stencil_bits_array,
573					  depth_buffer_factor,
574					  back_buffer_modes,
575					  back_buffer_factor,
576					  msaa_samples_array, 1);
577      configs_x8r8g8b8 = driCreateConfigs(GL_BGR, GL_UNSIGNED_INT_8_8_8_8_REV,
578					  depth_bits_array,
579					  stencil_bits_array,
580					  depth_buffer_factor,
581					  back_buffer_modes,
582					  back_buffer_factor,
583					  msaa_samples_array, 1);
584      configs = driConcatConfigs(configs_a8r8g8b8, configs_x8r8g8b8);
585   }
586
587   if (configs == NULL) {
588    fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
589              __LINE__);
590      return NULL;
591   }
592
593   /* Mark the visual as slow if there are "fake" stencil bits.
594    */
595   for (i = 0; configs[i]; i++) {
596      m = &configs[i]->modes;
597      if ((m->stencilBits != 0) && (m->stencilBits != stencil_bits)) {
598         m->visualRating = GLX_SLOW_CONFIG;
599      }
600   }
601
602   return configs;
603}
604
605static GLboolean
606intel_init_bufmgr(intelScreenPrivate *intelScreen)
607{
608   GLboolean gem_disable = getenv("INTEL_NO_GEM") != NULL;
609   int gem_kernel = 0;
610   GLboolean gem_supported;
611   struct drm_i915_getparam gp;
612   __DRIscreenPrivate *spriv = intelScreen->driScrnPriv;
613   int num_fences = 0;
614
615   intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
616
617   gp.param = I915_PARAM_HAS_GEM;
618   gp.value = &gem_kernel;
619
620   (void) drmCommandWriteRead(spriv->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
621
622   /* If we've got a new enough DDX that's initializing GEM and giving us
623    * object handles for the shared buffers, use that.
624    */
625   intelScreen->ttm = GL_FALSE;
626   if (intelScreen->driScrnPriv->dri2.enabled)
627       gem_supported = GL_TRUE;
628   else if (intelScreen->driScrnPriv->ddx_version.minor >= 9 &&
629	    gem_kernel &&
630	    intelScreen->front.bo_handle != -1)
631       gem_supported = GL_TRUE;
632   else
633       gem_supported = GL_FALSE;
634
635   if (!gem_disable && gem_supported) {
636      intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
637      if (intelScreen->bufmgr != NULL)
638	 intelScreen->ttm = GL_TRUE;
639   }
640   /* Otherwise, use the classic buffer manager. */
641   if (intelScreen->bufmgr == NULL) {
642      if (gem_disable) {
643	 _mesa_warning(NULL, "GEM disabled.  Using classic.");
644      } else {
645	 _mesa_warning(NULL,
646                       "Failed to initialize GEM.  Falling back to classic.");
647      }
648
649      if (intelScreen->tex.size == 0) {
650	 fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
651		 __func__, __LINE__);
652	 return GL_FALSE;
653      }
654
655      intelScreen->bufmgr =
656	 intel_bufmgr_fake_init(spriv->fd,
657				intelScreen->tex.offset,
658				intelScreen->tex.map,
659				intelScreen->tex.size,
660				(unsigned int * volatile)
661				&intelScreen->sarea->last_dispatch);
662   }
663
664   if (intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences))
665      intelScreen->kernel_exec_fencing = !!num_fences;
666   else
667      intelScreen->kernel_exec_fencing = GL_FALSE;
668
669   return GL_TRUE;
670}
671
672/**
673 * This is the driver specific part of the createNewScreen entry point.
674 * Called when using legacy DRI.
675 *
676 * \todo maybe fold this into intelInitDriver
677 *
678 * \return the __GLcontextModes supported by this driver
679 */
680static const __DRIconfig **intelInitScreen(__DRIscreenPrivate *psp)
681{
682   intelScreenPrivate *intelScreen;
683#ifdef I915
684   static const __DRIversion ddx_expected = { 1, 5, 0 };
685#else
686   static const __DRIversion ddx_expected = { 1, 6, 0 };
687#endif
688   static const __DRIversion dri_expected = { 4, 0, 0 };
689   static const __DRIversion drm_expected = { 1, 5, 0 };
690   I830DRIPtr dri_priv = (I830DRIPtr) psp->pDevPriv;
691
692   if (!driCheckDriDdxDrmVersions2("i915",
693                                   &psp->dri_version, &dri_expected,
694                                   &psp->ddx_version, &ddx_expected,
695                                   &psp->drm_version, &drm_expected)) {
696      return NULL;
697   }
698
699   /* Calling driInitExtensions here, with a NULL context pointer,
700    * does not actually enable the extensions.  It just makes sure
701    * that all the dispatch offsets for all the extensions that
702    * *might* be enables are known.  This is needed because the
703    * dispatch offsets need to be known when _mesa_context_create is
704    * called, but we can't enable the extensions until we have a
705    * context pointer.
706    *
707    * Hello chicken.  Hello egg.  How are you two today?
708    */
709   intelInitExtensions(NULL, GL_TRUE);
710
711   if (!intelInitDriver(psp))
712       return NULL;
713
714   psp->extensions = intelScreenExtensions;
715
716   intelScreen = psp->private;
717   if (!intel_init_bufmgr(intelScreen))
718       return GL_FALSE;
719
720   return (const __DRIconfig **)
721       intelFillInModes(psp, dri_priv->cpp * 8,
722			(dri_priv->cpp == 2) ? 16 : 24,
723			(dri_priv->cpp == 2) ? 0  : 8, 1);
724}
725
726struct intel_context *intelScreenContext(intelScreenPrivate *intelScreen)
727{
728  /*
729   * This should probably change to have the screen allocate a dummy
730   * context at screen creation. For now just use the current context.
731   */
732
733  GET_CURRENT_CONTEXT(ctx);
734  if (ctx == NULL) {
735     _mesa_problem(NULL, "No current context in intelScreenContext\n");
736     return NULL;
737  }
738  return intel_context(ctx);
739}
740
741/**
742 * This is the driver specific part of the createNewScreen entry point.
743 * Called when using DRI2.
744 *
745 * \return the __GLcontextModes supported by this driver
746 */
747static const
748__DRIconfig **intelInitScreen2(__DRIscreenPrivate *psp)
749{
750   intelScreenPrivate *intelScreen;
751   GLenum fb_format[3];
752   GLenum fb_type[3];
753   /* GLX_SWAP_COPY_OML is only supported because the Intel driver doesn't
754    * support pageflipping at all.
755    */
756   static const GLenum back_buffer_modes[] = {
757      GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
758   };
759   uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
760   int color;
761   __DRIconfig **configs = NULL;
762
763   /* Calling driInitExtensions here, with a NULL context pointer,
764    * does not actually enable the extensions.  It just makes sure
765    * that all the dispatch offsets for all the extensions that
766    * *might* be enables are known.  This is needed because the
767    * dispatch offsets need to be known when _mesa_context_create is
768    * called, but we can't enable the extensions until we have a
769    * context pointer.
770    *
771    * Hello chicken.  Hello egg.  How are you two today?
772    */
773   intelInitExtensions(NULL, GL_TRUE);
774
775   /* Allocate the private area */
776   intelScreen = (intelScreenPrivate *) CALLOC(sizeof(intelScreenPrivate));
777   if (!intelScreen) {
778      fprintf(stderr, "\nERROR!  Allocating private area failed\n");
779      return GL_FALSE;
780   }
781   /* parse information in __driConfigOptions */
782   driParseOptionInfo(&intelScreen->optionCache,
783                      __driConfigOptions, __driNConfigOptions);
784
785   intelScreen->driScrnPriv = psp;
786   psp->private = (void *) intelScreen;
787
788   intelScreen->drmMinor = psp->drm_version.minor;
789
790   /* Determine chipset ID */
791   if (!intel_get_param(psp, I915_PARAM_CHIPSET_ID,
792			&intelScreen->deviceID))
793      return GL_FALSE;
794
795   if (!intel_init_bufmgr(intelScreen))
796       return GL_FALSE;
797
798   intelScreen->irq_active = 1;
799   psp->extensions = intelScreenExtensions;
800
801   depth_bits[0] = 0;
802   stencil_bits[0] = 0;
803   depth_bits[1] = 16;
804   stencil_bits[1] = 0;
805   depth_bits[2] = 24;
806   stencil_bits[2] = 0;
807   depth_bits[3] = 24;
808   stencil_bits[3] = 8;
809
810   msaa_samples_array[0] = 0;
811
812   fb_format[0] = GL_RGB;
813   fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
814
815   fb_format[1] = GL_BGR;
816   fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
817
818   fb_format[2] = GL_BGRA;
819   fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
820
821   depth_bits[0] = 0;
822   stencil_bits[0] = 0;
823
824   for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
825      __DRIconfig **new_configs;
826      int depth_factor;
827
828      /* With DRI2 right now, GetBuffers always returns a depth/stencil buffer
829       * with the same cpp as the drawable.  So we can't support depth cpp !=
830       * color cpp currently.
831       */
832      if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
833	 depth_bits[1] = 16;
834	 stencil_bits[1] = 0;
835
836	 depth_factor = 2;
837      } else {
838	 depth_bits[1] = 24;
839	 stencil_bits[1] = 0;
840	 depth_bits[2] = 24;
841	 stencil_bits[2] = 8;
842
843	 depth_factor = 3;
844      }
845      new_configs = driCreateConfigs(fb_format[color], fb_type[color],
846				     depth_bits,
847				     stencil_bits,
848				     depth_factor,
849				     back_buffer_modes,
850				     ARRAY_SIZE(back_buffer_modes),
851				     msaa_samples_array,
852				     ARRAY_SIZE(msaa_samples_array));
853      if (configs == NULL)
854	 configs = new_configs;
855      else
856	 configs = driConcatConfigs(configs, new_configs);
857   }
858
859   if (configs == NULL) {
860      fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
861              __LINE__);
862      return NULL;
863   }
864
865   return (const __DRIconfig **)configs;
866}
867
868const struct __DriverAPIRec driDriverAPI = {
869   .InitScreen		 = intelInitScreen,
870   .DestroyScreen	 = intelDestroyScreen,
871   .CreateContext	 = intelCreateContext,
872   .DestroyContext	 = intelDestroyContext,
873   .CreateBuffer	 = intelCreateBuffer,
874   .DestroyBuffer	 = intelDestroyBuffer,
875   .SwapBuffers		 = intelSwapBuffers,
876   .MakeCurrent		 = intelMakeCurrent,
877   .UnbindContext	 = intelUnbindContext,
878   .GetSwapInfo		 = intelGetSwapInfo,
879   .GetDrawableMSC	 = driDrawableGetMSC32,
880   .WaitForMSC		 = driWaitForMSC32,
881   .CopySubBuffer	 = intelCopySubBuffer,
882
883   .InitScreen2		 = intelInitScreen2,
884};
885