src/mesa/drivers/dri/i915/intel_screen.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 VMware, Inc.
   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 VMWARE 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 <time.h>
  30 #include <unistd.h>
  31 #include "main/glheader.h"
  32 #include "main/context.h"
  33 #include "main/framebuffer.h"
  34 #include "main/renderbuffer.h"
  35 #include "main/texobj.h"
  36 #include "main/hash.h"
  37 #include "main/fbobject.h"
  38 #include "main/version.h"
  39 #include "swrast/s_renderbuffer.h"
  40
  41 #include "utils.h"
  42 #include "xmlpool.h"
  43
  44 static const __DRIconfigOptionsExtension i915_config_options = {
  45    .base = { __DRI_CONFIG_OPTIONS, 1 },
  46    .xml =
  47
  48 DRI_CONF_BEGIN
  49    DRI_CONF_SECTION_PERFORMANCE
  50       DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
  51       /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
  52        * DRI_CONF_BO_REUSE_ALL
  53        */
  54       DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
  55          DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
  56             DRI_CONF_ENUM(0, "Disable buffer object reuse")
  57             DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
  58          DRI_CONF_DESC_END
  59       DRI_CONF_OPT_END
  60
  61       DRI_CONF_OPT_BEGIN_B(early_z, "false")
  62          DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
  63       DRI_CONF_OPT_END
  64
  65       DRI_CONF_OPT_BEGIN_B(fragment_shader, "true")
  66          DRI_CONF_DESC(en, "Enable limited ARB_fragment_shader support on 915/945.")
  67       DRI_CONF_OPT_END
  68
  69    DRI_CONF_SECTION_END
  70    DRI_CONF_SECTION_QUALITY
  71       DRI_CONF_FORCE_S3TC_ENABLE("false")
  72    DRI_CONF_SECTION_END
  73    DRI_CONF_SECTION_DEBUG
  74       DRI_CONF_NO_RAST("false")
  75       DRI_CONF_ALWAYS_FLUSH_BATCH("false")
  76       DRI_CONF_ALWAYS_FLUSH_CACHE("false")
  77       DRI_CONF_DISABLE_THROTTLING("false")
  78       DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN("false")
  79       DRI_CONF_DISABLE_GLSL_LINE_CONTINUATIONS("false")
  80       DRI_CONF_DISABLE_BLEND_FUNC_EXTENDED("false")
  81
  82       DRI_CONF_OPT_BEGIN_B(stub_occlusion_query, "false")
  83          DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
  84       DRI_CONF_OPT_END
  85
  86       DRI_CONF_OPT_BEGIN_B(shader_precompile, "true")
  87          DRI_CONF_DESC(en, "Perform code generation at shader link time.")
  88       DRI_CONF_OPT_END
  89    DRI_CONF_SECTION_END
  90 DRI_CONF_END
  91 };
  92
  93 #include "intel_batchbuffer.h"
  94 #include "intel_buffers.h"
  95 #include "intel_bufmgr.h"
  96 #include "intel_chipset.h"
  97 #include "intel_fbo.h"
  98 #include "intel_mipmap_tree.h"
  99 #include "intel_screen.h"
 100 #include "intel_tex.h"
 101 #include "intel_regions.h"
 102
 103 #include "i915_drm.h"
 104
 105 /**
 106  * For debugging purposes, this returns a time in seconds.
 107  */
 108 double
 109 get_time(void)
 110 {
 111    struct timespec tp;
 112
 113    clock_gettime(CLOCK_MONOTONIC, &tp);
 114
 115    return tp.tv_sec + tp.tv_nsec / 1000000000.0;
 116 }
 117
 118 void
 119 aub_dump_bmp(struct gl_context *ctx)
 120 {
 121    struct gl_framebuffer *fb = ctx->DrawBuffer;
 122
 123    for (int i = 0; i < fb->_NumColorDrawBuffers; i++) {
 124       struct intel_renderbuffer *irb =
 125          intel_renderbuffer(fb->_ColorDrawBuffers[i]);
 126
 127       if (irb && irb->mt) {
 128          enum aub_dump_bmp_format format;
 129
 130          switch (irb->Base.Base.Format) {
 131          case MESA_FORMAT_B8G8R8A8_UNORM:
 132          case MESA_FORMAT_B8G8R8X8_UNORM:
 133             format = AUB_DUMP_BMP_FORMAT_ARGB_8888;
 134             break;
 135          default:
 136             continue;
 137          }
 138
 139          assert(irb->mt->region->pitch % irb->mt->region->cpp == 0);
 140          drm_intel_gem_bo_aub_dump_bmp(irb->mt->region->bo,
 141                                        irb->draw_x,
 142                                        irb->draw_y,
 143                                        irb->Base.Base.Width,
 144                                        irb->Base.Base.Height,
 145                                        format,
 146                                        irb->mt->region->pitch,
 147                                        0);
 148       }
 149    }
 150 }
 151
 152 static const __DRItexBufferExtension intelTexBufferExtension = {
 153    .base = { __DRI_TEX_BUFFER, 3 },
 154
 155    .setTexBuffer        = intelSetTexBuffer,
 156    .setTexBuffer2       = intelSetTexBuffer2,
 157    .releaseTexBuffer    = NULL,
 158 };
 159
 160 static void
 161 intelDRI2Flush(__DRIdrawable *drawable)
 162 {
 163    GET_CURRENT_CONTEXT(ctx);
 164    struct intel_context *intel = intel_context(ctx);
 165    if (intel == NULL)
 166       return;
 167
 168    INTEL_FIREVERTICES(intel);
 169
 170    intel->need_throttle = true;
 171
 172    if (intel->batch.used)
 173       intel_batchbuffer_flush(intel);
 174
 175    if (INTEL_DEBUG & DEBUG_AUB) {
 176       aub_dump_bmp(ctx);
 177    }
 178 }
 179
 180 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 181     .base = { __DRI2_FLUSH, 3 },
 182
 183     .flush              = intelDRI2Flush,
 184     .invalidate         = dri2InvalidateDrawable,
 185 };
 186
 187 static struct intel_image_format intel_image_formats[] = {
 188    { __DRI_IMAGE_FOURCC_ARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
 189      { { 0, 0, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } },
 190
 191    { __DRI_IMAGE_FOURCC_SARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
 192      { { 0, 0, 0, __DRI_IMAGE_FORMAT_SARGB8, 4 } } },
 193
 194    { __DRI_IMAGE_FOURCC_XRGB8888, __DRI_IMAGE_COMPONENTS_RGB, 1,
 195      { { 0, 0, 0, __DRI_IMAGE_FORMAT_XRGB8888, 4 }, } },
 196
 197    { __DRI_IMAGE_FOURCC_YUV410, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 198      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 199        { 1, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 },
 200        { 2, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 } } },
 201
 202    { __DRI_IMAGE_FOURCC_YUV411, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 203      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 204        { 1, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 205        { 2, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 206
 207    { __DRI_IMAGE_FOURCC_YUV420, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 208      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 209        { 1, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 },
 210        { 2, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 } } },
 211
 212    { __DRI_IMAGE_FOURCC_YUV422, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 213      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 214        { 1, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 215        { 2, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 216
 217    { __DRI_IMAGE_FOURCC_YUV444, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 218      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 219        { 1, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 220        { 2, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 221
 222    { __DRI_IMAGE_FOURCC_NV12, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 223      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 224        { 1, 1, 1, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 225
 226    { __DRI_IMAGE_FOURCC_NV16, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 227      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 228        { 1, 1, 0, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 229
 230    /* For YUYV buffers, we set up two overlapping DRI images and treat
 231     * them as planar buffers in the compositors.  Plane 0 is GR88 and
 232     * samples YU or YV pairs and places Y into the R component, while
 233     * plane 1 is ARGB and samples YUYV clusters and places pairs and
 234     * places U into the G component and V into A.  This lets the
 235     * texture sampler interpolate the Y components correctly when
 236     * sampling from plane 0, and interpolate U and V correctly when
 237     * sampling from plane 1. */
 238    { __DRI_IMAGE_FOURCC_YUYV, __DRI_IMAGE_COMPONENTS_Y_XUXV, 2,
 239      { { 0, 0, 0, __DRI_IMAGE_FORMAT_GR88, 2 },
 240        { 0, 1, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } }
 241 };
 242
 243 static __DRIimage *
 244 intel_allocate_image(int dri_format, void *loaderPrivate)
 245 {
 246     __DRIimage *image;
 247
 248     image = calloc(1, sizeof *image);
 249     if (image == NULL)
 250         return NULL;
 251
 252     image->dri_format = dri_format;
 253     image->offset = 0;
 254
 255     image->format = driImageFormatToGLFormat(dri_format);
 256     if (dri_format != __DRI_IMAGE_FORMAT_NONE &&
 257         image->format == MESA_FORMAT_NONE) {
 258        free(image);
 259        return NULL;
 260     }
 261
 262     image->internal_format = _mesa_get_format_base_format(image->format);
 263     image->data = loaderPrivate;
 264
 265     return image;
 266 }
 267
 268 /**
 269  * Sets up a DRIImage structure to point to our shared image in a region
 270  */
 271 static void
 272 intel_setup_image_from_mipmap_tree(struct intel_context *intel, __DRIimage *image,
 273                                    struct intel_mipmap_tree *mt, GLuint level,
 274                                    GLuint zoffset)
 275 {
 276    unsigned int draw_x, draw_y;
 277    uint32_t mask_x, mask_y;
 278
 279    intel_miptree_check_level_layer(mt, level, zoffset);
 280
 281    intel_region_get_tile_masks(mt->region, &mask_x, &mask_y, false);
 282    intel_miptree_get_image_offset(mt, level, zoffset, &draw_x, &draw_y);
 283
 284    image->width = mt->level[level].width;
 285    image->height = mt->level[level].height;
 286    image->tile_x = draw_x & mask_x;
 287    image->tile_y = draw_y & mask_y;
 288
 289    image->offset = intel_region_get_aligned_offset(mt->region,
 290                                                    draw_x & ~mask_x,
 291                                                    draw_y & ~mask_y,
 292                                                    false);
 293
 294    intel_region_reference(&image->region, mt->region);
 295 }
 296
 297 static void
 298 intel_setup_image_from_dimensions(__DRIimage *image)
 299 {
 300    image->width    = image->region->width;
 301    image->height   = image->region->height;
 302    image->tile_x = 0;
 303    image->tile_y = 0;
 304 }
 305
 306 static __DRIimage *
 307 intel_create_image_from_name(__DRIscreen *screen,
 308                              int width, int height, int format,
 309                              int name, int pitch, void *loaderPrivate)
 310 {
 311     struct intel_screen *intelScreen = screen->driverPrivate;
 312     __DRIimage *image;
 313     int cpp;
 314
 315     image = intel_allocate_image(format, loaderPrivate);
 316     if (image == NULL)
 317        return NULL;
 318
 319     if (image->format == MESA_FORMAT_NONE)
 320        cpp = 1;
 321     else
 322        cpp = _mesa_get_format_bytes(image->format);
 323     image->region = intel_region_alloc_for_handle(intelScreen,
 324                                                   cpp, width, height,
 325                                                   pitch * cpp, name, "image");
 326     if (image->region == NULL) {
 327        free(image);
 328        return NULL;
 329     }
 330
 331     intel_setup_image_from_dimensions(image);
 332
 333     return image;
 334 }
 335
 336 static __DRIimage *
 337 intel_create_image_from_renderbuffer(__DRIcontext *context,
 338                                      int renderbuffer, void *loaderPrivate)
 339 {
 340    __DRIimage *image;
 341    struct intel_context *intel = context->driverPrivate;
 342    struct gl_renderbuffer *rb;
 343    struct intel_renderbuffer *irb;
 344
 345    rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
 346    if (!rb) {
 347       _mesa_error(&intel->ctx,
 348                   GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 349       return NULL;
 350    }
 351
 352    irb = intel_renderbuffer(rb);
 353    image = calloc(1, sizeof *image);
 354    if (image == NULL)
 355       return NULL;
 356
 357    image->internal_format = rb->InternalFormat;
 358    image->format = rb->Format;
 359    image->offset = 0;
 360    image->data = loaderPrivate;
 361    intel_region_reference(&image->region, irb->mt->region);
 362    intel_setup_image_from_dimensions(image);
 363    image->dri_format = driGLFormatToImageFormat(image->format);
 364
 365    rb->NeedsFinishRenderTexture = true;
 366    return image;
 367 }
 368
 369 static __DRIimage *
 370 intel_create_image_from_texture(__DRIcontext *context, int target,
 371                                 unsigned texture, int zoffset,
 372                                 int level,
 373                                 unsigned *error,
 374                                 void *loaderPrivate)
 375 {
 376    __DRIimage *image;
 377    struct intel_context *intel = context->driverPrivate;
 378    struct gl_texture_object *obj;
 379    struct intel_texture_object *iobj;
 380    GLuint face = 0;
 381
 382    obj = _mesa_lookup_texture(&intel->ctx, texture);
 383    if (!obj || obj->Target != target) {
 384       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 385       return NULL;
 386    }
 387
 388    if (target == GL_TEXTURE_CUBE_MAP)
 389       face = zoffset;
 390
 391    _mesa_test_texobj_completeness(&intel->ctx, obj);
 392    iobj = intel_texture_object(obj);
 393    if (!obj->_BaseComplete || (level > 0 && !obj->_MipmapComplete)) {
 394       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 395       return NULL;
 396    }
 397
 398    if (level < obj->BaseLevel || level > obj->_MaxLevel) {
 399       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 400       return NULL;
 401    }
 402
 403    if (target == GL_TEXTURE_3D && obj->Image[face][level]->Depth < zoffset) {
 404       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 405       return NULL;
 406    }
 407    image = calloc(1, sizeof *image);
 408    if (image == NULL) {
 409       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
 410       return NULL;
 411    }
 412
 413    image->internal_format = obj->Image[face][level]->InternalFormat;
 414    image->format = obj->Image[face][level]->TexFormat;
 415    image->data = loaderPrivate;
 416    intel_setup_image_from_mipmap_tree(intel, image, iobj->mt, level, zoffset);
 417    image->dri_format = driGLFormatToImageFormat(image->format);
 418    if (image->dri_format == MESA_FORMAT_NONE) {
 419       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 420       free(image);
 421       return NULL;
 422    }
 423
 424    *error = __DRI_IMAGE_ERROR_SUCCESS;
 425    return image;
 426 }
 427
 428 static void
 429 intel_destroy_image(__DRIimage *image)
 430 {
 431     intel_region_release(&image->region);
 432     free(image);
 433 }
 434
 435 static __DRIimage *
 436 intel_create_image(__DRIscreen *screen,
 437                    int width, int height, int format,
 438                    unsigned int use,
 439                    void *loaderPrivate)
 440 {
 441    __DRIimage *image;
 442    struct intel_screen *intelScreen = screen->driverPrivate;
 443    uint32_t tiling;
 444    int cpp;
 445
 446    tiling = I915_TILING_X;
 447    if (use & __DRI_IMAGE_USE_CURSOR) {
 448       if (width != 64 || height != 64)
 449          return NULL;
 450       tiling = I915_TILING_NONE;
 451    }
 452
 453    if (use & __DRI_IMAGE_USE_LINEAR)
 454       tiling = I915_TILING_NONE;
 455
 456    image = intel_allocate_image(format, loaderPrivate);
 457    if (image == NULL)
 458       return NULL;
 459
 460    cpp = _mesa_get_format_bytes(image->format);
 461    image->region =
 462       intel_region_alloc(intelScreen, tiling, cpp, width, height, true);
 463    if (image->region == NULL) {
 464       free(image);
 465       return NULL;
 466    }
 467
 468    intel_setup_image_from_dimensions(image);
 469
 470    return image;
 471 }
 472
 473 static GLboolean
 474 intel_query_image(__DRIimage *image, int attrib, int *value)
 475 {
 476    switch (attrib) {
 477    case __DRI_IMAGE_ATTRIB_STRIDE:
 478       *value = image->region->pitch;
 479       return true;
 480    case __DRI_IMAGE_ATTRIB_HANDLE:
 481       *value = image->region->bo->handle;
 482       return true;
 483    case __DRI_IMAGE_ATTRIB_NAME:
 484       return intel_region_flink(image->region, (uint32_t *) value);
 485    case __DRI_IMAGE_ATTRIB_FORMAT:
 486       *value = image->dri_format;
 487       return true;
 488    case __DRI_IMAGE_ATTRIB_WIDTH:
 489       *value = image->region->width;
 490       return true;
 491    case __DRI_IMAGE_ATTRIB_HEIGHT:
 492       *value = image->region->height;
 493       return true;
 494    case __DRI_IMAGE_ATTRIB_COMPONENTS:
 495       if (image->planar_format == NULL)
 496          return false;
 497       *value = image->planar_format->components;
 498       return true;
 499    case __DRI_IMAGE_ATTRIB_FD:
 500       return !drm_intel_bo_gem_export_to_prime(image->region->bo, value);
 501   default:
 502       return false;
 503    }
 504 }
 505
 506 static __DRIimage *
 507 intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
 508 {
 509    __DRIimage *image;
 510
 511    image = calloc(1, sizeof *image);
 512    if (image == NULL)
 513       return NULL;
 514
 515    intel_region_reference(&image->region, orig_image->region);
 516    if (image->region == NULL) {
 517       free(image);
 518       return NULL;
 519    }
 520
 521    image->internal_format = orig_image->internal_format;
 522    image->planar_format   = orig_image->planar_format;
 523    image->dri_format      = orig_image->dri_format;
 524    image->format          = orig_image->format;
 525    image->offset          = orig_image->offset;
 526    image->width           = orig_image->width;
 527    image->height          = orig_image->height;
 528    image->tile_x          = orig_image->tile_x;
 529    image->tile_y          = orig_image->tile_y;
 530    image->data            = loaderPrivate;
 531
 532    memcpy(image->strides, orig_image->strides, sizeof(image->strides));
 533    memcpy(image->offsets, orig_image->offsets, sizeof(image->offsets));
 534
 535    return image;
 536 }
 537
 538 static GLboolean
 539 intel_validate_usage(__DRIimage *image, unsigned int use)
 540 {
 541    if (use & __DRI_IMAGE_USE_CURSOR) {
 542       if (image->region->width != 64 || image->region->height != 64)
 543          return GL_FALSE;
 544    }
 545
 546    return GL_TRUE;
 547 }
 548
 549 static __DRIimage *
 550 intel_create_image_from_names(__DRIscreen *screen,
 551                               int width, int height, int fourcc,
 552                               int *names, int num_names,
 553                               int *strides, int *offsets,
 554                               void *loaderPrivate)
 555 {
 556     struct intel_image_format *f = NULL;
 557     __DRIimage *image;
 558     int i, index;
 559
 560     if (screen == NULL || names == NULL || num_names != 1)
 561         return NULL;
 562
 563     for (i = 0; i < ARRAY_SIZE(intel_image_formats); i++) {
 564         if (intel_image_formats[i].fourcc == fourcc) {
 565            f = &intel_image_formats[i];
 566         }
 567     }
 568
 569     if (f == NULL)
 570         return NULL;
 571
 572     image = intel_create_image_from_name(screen, width, height,
 573                                          __DRI_IMAGE_FORMAT_NONE,
 574                                          names[0], strides[0],
 575                                          loaderPrivate);
 576
 577    if (image == NULL)
 578       return NULL;
 579
 580     image->planar_format = f;
 581     for (i = 0; i < f->nplanes; i++) {
 582         index = f->planes[i].buffer_index;
 583         image->offsets[index] = offsets[index];
 584         image->strides[index] = strides[index];
 585     }
 586
 587     return image;
 588 }
 589
 590 static __DRIimage *
 591 intel_create_image_from_fds(__DRIscreen *screen,
 592                             int width, int height, int fourcc,
 593                             int *fds, int num_fds, int *strides, int *offsets,
 594                             void *loaderPrivate)
 595 {
 596    struct intel_screen *intelScreen = screen->driverPrivate;
 597    struct intel_image_format *f = NULL;
 598    __DRIimage *image;
 599    int i, index;
 600
 601    if (fds == NULL || num_fds != 1)
 602       return NULL;
 603
 604    for (i = 0; i < ARRAY_SIZE(intel_image_formats); i++) {
 605       if (intel_image_formats[i].fourcc == fourcc) {
 606          f = &intel_image_formats[i];
 607       }
 608    }
 609
 610    if (f == NULL)
 611       return NULL;
 612
 613    image = intel_allocate_image(__DRI_IMAGE_FORMAT_NONE, loaderPrivate);
 614    if (image == NULL)
 615       return NULL;
 616
 617    image->region = intel_region_alloc_for_fd(intelScreen,
 618                                              f->planes[0].cpp, width, height, strides[0],
 619                                              height * strides[0], fds[0], "image");
 620    if (image->region == NULL) {
 621       free(image);
 622       return NULL;
 623    }
 624
 625    intel_setup_image_from_dimensions(image);
 626
 627    image->planar_format = f;
 628    for (i = 0; i < f->nplanes; i++) {
 629       index = f->planes[i].buffer_index;
 630       image->offsets[index] = offsets[index];
 631       image->strides[index] = strides[index];
 632    }
 633
 634    return image;
 635 }
 636
 637
 638 static __DRIimage *
 639 intel_from_planar(__DRIimage *parent, int plane, void *loaderPrivate)
 640 {
 641     int width, height, offset, stride, dri_format, index;
 642     struct intel_image_format *f;
 643     uint32_t mask_x, mask_y;
 644     __DRIimage *image;
 645
 646     if (parent == NULL || parent->planar_format == NULL)
 647         return NULL;
 648
 649     f = parent->planar_format;
 650
 651     if (plane >= f->nplanes)
 652         return NULL;
 653
 654     width = parent->region->width >> f->planes[plane].width_shift;
 655     height = parent->region->height >> f->planes[plane].height_shift;
 656     dri_format = f->planes[plane].dri_format;
 657     index = f->planes[plane].buffer_index;
 658     offset = parent->offsets[index];
 659     stride = parent->strides[index];
 660
 661     image = intel_allocate_image(dri_format, loaderPrivate);
 662     if (image == NULL)
 663        return NULL;
 664
 665     if (offset + height * stride > parent->region->bo->size) {
 666        _mesa_warning(NULL, "intel_create_sub_image: subimage out of bounds");
 667        free(image);
 668        return NULL;
 669     }
 670
 671     image->region = calloc(sizeof(*image->region), 1);
 672     if (image->region == NULL) {
 673        free(image);
 674        return NULL;
 675     }
 676
 677     image->region->cpp = _mesa_get_format_bytes(image->format);
 678     image->region->width = width;
 679     image->region->height = height;
 680     image->region->pitch = stride;
 681     image->region->refcount = 1;
 682     image->region->bo = parent->region->bo;
 683     drm_intel_bo_reference(image->region->bo);
 684     image->region->tiling = parent->region->tiling;
 685     image->offset = offset;
 686     intel_setup_image_from_dimensions(image);
 687
 688     intel_region_get_tile_masks(image->region, &mask_x, &mask_y, false);
 689     if (offset & mask_x)
 690        _mesa_warning(NULL,
 691                      "intel_create_sub_image: offset not on tile boundary");
 692
 693     return image;
 694 }
 695
 696 static const __DRIimageExtension intelImageExtension = {
 697     .base = { __DRI_IMAGE, 7 },
 698
 699     .createImageFromName                = intel_create_image_from_name,
 700     .createImageFromRenderbuffer        = intel_create_image_from_renderbuffer,
 701     .destroyImage                       = intel_destroy_image,
 702     .createImage                        = intel_create_image,
 703     .queryImage                         = intel_query_image,
 704     .dupImage                           = intel_dup_image,
 705     .validateUsage                      = intel_validate_usage,
 706     .createImageFromNames               = intel_create_image_from_names,
 707     .fromPlanar                         = intel_from_planar,
 708     .createImageFromTexture             = intel_create_image_from_texture,
 709     .createImageFromFds                 = intel_create_image_from_fds
 710 };
 711
 712 static int
 713 i915_query_renderer_integer(__DRIscreen *psp, int param, unsigned int *value)
 714 {
 715    const struct intel_screen *const intelScreen =
 716       (struct intel_screen *) psp->driverPrivate;
 717
 718    switch (param) {
 719    case __DRI2_RENDERER_VENDOR_ID:
 720       value[0] = 0x8086;
 721       return 0;
 722    case __DRI2_RENDERER_DEVICE_ID:
 723       value[0] = intelScreen->deviceID;
 724       return 0;
 725    case __DRI2_RENDERER_ACCELERATED:
 726       value[0] = 1;
 727       return 0;
 728    case __DRI2_RENDERER_VIDEO_MEMORY: {
 729       /* Once a batch uses more than 75% of the maximum mappable size, we
 730        * assume that there's some fragmentation, and we start doing extra
 731        * flushing, etc.  That's the big cliff apps will care about.
 732        */
 733       size_t aper_size;
 734       size_t mappable_size;
 735
 736       drm_intel_get_aperture_sizes(psp->fd, &mappable_size, &aper_size);
 737
 738       const unsigned gpu_mappable_megabytes =
 739          (aper_size / (1024 * 1024)) * 3 / 4;
 740
 741       const long system_memory_pages = sysconf(_SC_PHYS_PAGES);
 742       const long system_page_size = sysconf(_SC_PAGE_SIZE);
 743
 744       if (system_memory_pages <= 0 || system_page_size <= 0)
 745          return -1;
 746
 747       const uint64_t system_memory_bytes = (uint64_t) system_memory_pages
 748          * (uint64_t) system_page_size;
 749
 750       const unsigned system_memory_megabytes =
 751          (unsigned) (system_memory_bytes / (1024 * 1024));
 752
 753       value[0] = MIN2(system_memory_megabytes, gpu_mappable_megabytes);
 754       return 0;
 755    }
 756    case __DRI2_RENDERER_UNIFIED_MEMORY_ARCHITECTURE:
 757       value[0] = 1;
 758       return 0;
 759    case __DRI2_RENDERER_HAS_TEXTURE_3D:
 760       value[0] = 1;
 761       return 0;
 762    default:
 763       return driQueryRendererIntegerCommon(psp, param, value);
 764    }
 765
 766    return -1;
 767 }
 768
 769 static int
 770 i915_query_renderer_string(__DRIscreen *psp, int param, const char **value)
 771 {
 772    const struct intel_screen *intelScreen =
 773       (struct intel_screen *) psp->driverPrivate;
 774
 775    switch (param) {
 776    case __DRI2_RENDERER_VENDOR_ID:
 777       value[0] = i915_vendor_string;
 778       return 0;
 779    case __DRI2_RENDERER_DEVICE_ID:
 780       value[0] = i915_get_renderer_string(intelScreen->deviceID);
 781       return 0;
 782    default:
 783       break;
 784    }
 785
 786    return -1;
 787 }
 788
 789 static const __DRI2rendererQueryExtension intelRendererQueryExtension = {
 790    .base = { __DRI2_RENDERER_QUERY, 1 },
 791
 792    .queryInteger = i915_query_renderer_integer,
 793    .queryString = i915_query_renderer_string
 794 };
 795
 796 static const __DRIextension *intelScreenExtensions[] = {
 797     &intelTexBufferExtension.base,
 798     &intelFenceExtension.base,
 799     &intelFlushExtension.base,
 800     &intelImageExtension.base,
 801     &intelRendererQueryExtension.base,
 802     &dri2ConfigQueryExtension.base,
 803     NULL
 804 };
 805
 806 static bool
 807 intel_get_param(__DRIscreen *psp, int param, int *value)
 808 {
 809    int ret;
 810    struct drm_i915_getparam gp;
 811
 812    memset(&gp, 0, sizeof(gp));
 813    gp.param = param;
 814    gp.value = value;
 815
 816    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 817    if (ret) {
 818       if (ret != -EINVAL)
 819          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 820       return false;
 821    }
 822
 823    return true;
 824 }
 825
 826 static bool
 827 intel_get_boolean(__DRIscreen *psp, int param)
 828 {
 829    int value = 0;
 830    return intel_get_param(psp, param, &value) && value;
 831 }
 832
 833 static void
 834 intelDestroyScreen(__DRIscreen * sPriv)
 835 {
 836    struct intel_screen *intelScreen = sPriv->driverPrivate;
 837
 838    dri_bufmgr_destroy(intelScreen->bufmgr);
 839    driDestroyOptionInfo(&intelScreen->optionCache);
 840
 841    free(intelScreen);
 842    sPriv->driverPrivate = NULL;
 843 }
 844
 845
 846 /**
 847  * This is called when we need to set up GL rendering to a new X window.
 848  */
 849 static GLboolean
 850 intelCreateBuffer(__DRIscreen * driScrnPriv,
 851                   __DRIdrawable * driDrawPriv,
 852                   const struct gl_config * mesaVis, GLboolean isPixmap)
 853 {
 854    struct intel_renderbuffer *rb;
 855    mesa_format rgbFormat;
 856    struct gl_framebuffer *fb;
 857
 858    if (isPixmap)
 859       return false;
 860
 861    fb = CALLOC_STRUCT(gl_framebuffer);
 862    if (!fb)
 863       return false;
 864
 865    _mesa_initialize_window_framebuffer(fb, mesaVis);
 866
 867    if (mesaVis->redBits == 5)
 868       rgbFormat = MESA_FORMAT_B5G6R5_UNORM;
 869    else if (mesaVis->sRGBCapable)
 870       rgbFormat = MESA_FORMAT_B8G8R8A8_SRGB;
 871    else if (mesaVis->alphaBits == 0)
 872       rgbFormat = MESA_FORMAT_B8G8R8X8_UNORM;
 873    else
 874       rgbFormat = MESA_FORMAT_B8G8R8A8_UNORM;
 875
 876    /* setup the hardware-based renderbuffers */
 877    rb = intel_create_renderbuffer(rgbFormat);
 878    _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base.Base);
 879
 880    if (mesaVis->doubleBufferMode) {
 881       rb = intel_create_renderbuffer(rgbFormat);
 882       _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base.Base);
 883    }
 884
 885    /*
 886     * Assert here that the gl_config has an expected depth/stencil bit
 887     * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
 888     * which constructs the advertised configs.)
 889     */
 890    if (mesaVis->depthBits == 24) {
 891       assert(mesaVis->stencilBits == 8);
 892
 893       /*
 894        * Use combined depth/stencil. Note that the renderbuffer is
 895        * attached to two attachment points.
 896        */
 897       rb = intel_create_private_renderbuffer(MESA_FORMAT_Z24_UNORM_S8_UINT);
 898       _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 899       _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 900    }
 901    else if (mesaVis->depthBits == 16) {
 902       assert(mesaVis->stencilBits == 0);
 903       rb = intel_create_private_renderbuffer(MESA_FORMAT_Z_UNORM16);
 904       _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 905    }
 906    else {
 907       assert(mesaVis->depthBits == 0);
 908       assert(mesaVis->stencilBits == 0);
 909    }
 910
 911    /* now add any/all software-based renderbuffers we may need */
 912    _swrast_add_soft_renderbuffers(fb,
 913                                   false, /* never sw color */
 914                                   false, /* never sw depth */
 915                                   false, /* never sw stencil */
 916                                   mesaVis->accumRedBits > 0,
 917                                   false, /* never sw alpha */
 918                                   false  /* never sw aux */ );
 919    driDrawPriv->driverPrivate = fb;
 920
 921    return true;
 922 }
 923
 924 static void
 925 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 926 {
 927     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 928
 929     _mesa_reference_framebuffer(&fb, NULL);
 930 }
 931
 932 /* There are probably better ways to do this, such as an
 933  * init-designated function to register chipids and createcontext
 934  * functions.
 935  */
 936 extern bool
 937 i830CreateContext(int api,
 938                   const struct gl_config *mesaVis,
 939                   __DRIcontext *driContextPriv,
 940                   unsigned major_version,
 941                   unsigned minor_version,
 942                   uint32_t flags,
 943                   unsigned *error,
 944                   void *sharedContextPrivate);
 945
 946 extern bool
 947 i915CreateContext(int api,
 948                   const struct gl_config *mesaVis,
 949                   __DRIcontext *driContextPriv,
 950                   unsigned major_version,
 951                   unsigned minor_version,
 952                   uint32_t flags,
 953                   unsigned *error,
 954                   void *sharedContextPrivate);
 955
 956 static GLboolean
 957 intelCreateContext(gl_api api,
 958                    const struct gl_config * mesaVis,
 959                    __DRIcontext * driContextPriv,
 960                    unsigned major_version,
 961                    unsigned minor_version,
 962                    uint32_t flags,
 963                    bool notify_reset,
 964                    unsigned *error,
 965                    void *sharedContextPrivate)
 966 {
 967    bool success = false;
 968
 969    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 970    struct intel_screen *intelScreen = sPriv->driverPrivate;
 971
 972    if (flags & ~__DRI_CTX_FLAG_DEBUG) {
 973       *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
 974       return false;
 975    }
 976
 977    if (notify_reset) {
 978       *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
 979       return false;
 980    }
 981
 982    if (IS_GEN3(intelScreen->deviceID)) {
 983       success = i915CreateContext(api, mesaVis, driContextPriv,
 984                                   major_version, minor_version, flags,
 985                                   error, sharedContextPrivate);
 986    } else {
 987       intelScreen->no_vbo = true;
 988       success = i830CreateContext(api, mesaVis, driContextPriv,
 989                                   major_version, minor_version, flags,
 990                                   error, sharedContextPrivate);
 991    }
 992
 993    if (success)
 994       return true;
 995
 996    if (driContextPriv->driverPrivate != NULL)
 997       intelDestroyContext(driContextPriv);
 998
 999    return false;
1000 }
1001
1002 static bool
1003 intel_init_bufmgr(struct intel_screen *intelScreen)
1004 {
1005    __DRIscreen *spriv = intelScreen->driScrnPriv;
1006
1007    intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
1008
1009    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
1010    if (intelScreen->bufmgr == NULL) {
1011       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
1012               __func__, __LINE__);
1013       return false;
1014    }
1015
1016    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
1017
1018    if (!intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA)) {
1019       fprintf(stderr, "[%s: %u] Kernel 2.6.39 required.\n", __func__, __LINE__);
1020       return false;
1021    }
1022
1023    return true;
1024 }
1025
1026 static bool
1027 intel_detect_swizzling(struct intel_screen *screen)
1028 {
1029    drm_intel_bo *buffer;
1030    unsigned long flags = 0;
1031    unsigned long aligned_pitch;
1032    uint32_t tiling = I915_TILING_X;
1033    uint32_t swizzle_mode = 0;
1034
1035    buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "swizzle test",
1036                                      64, 64, 4,
1037                                      &tiling, &aligned_pitch, flags);
1038    if (buffer == NULL)
1039       return false;
1040
1041    drm_intel_bo_get_tiling(buffer, &tiling, &swizzle_mode);
1042    drm_intel_bo_unreference(buffer);
1043
1044    if (swizzle_mode == I915_BIT_6_SWIZZLE_NONE)
1045       return false;
1046    else
1047       return true;
1048 }
1049
1050 static __DRIconfig**
1051 intel_screen_make_configs(__DRIscreen *dri_screen)
1052 {
1053    static const mesa_format formats[] = {
1054       MESA_FORMAT_B5G6R5_UNORM,
1055       MESA_FORMAT_B8G8R8A8_UNORM,
1056       MESA_FORMAT_B8G8R8X8_UNORM
1057    };
1058
1059    /* GLX_SWAP_COPY_OML is not supported due to page flipping. */
1060    static const GLenum back_buffer_modes[] = {
1061        GLX_SWAP_UNDEFINED_OML, GLX_NONE,
1062    };
1063
1064    static const uint8_t singlesample_samples[1] = {0};
1065
1066    uint8_t depth_bits[4], stencil_bits[4];
1067    __DRIconfig **configs = NULL;
1068
1069    /* Generate singlesample configs without accumulation buffer. */
1070    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1071       __DRIconfig **new_configs;
1072       int num_depth_stencil_bits = 2;
1073
1074       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
1075        * buffer that has a different number of bits per pixel than the color
1076        * buffer.
1077        */
1078       depth_bits[0] = 0;
1079       stencil_bits[0] = 0;
1080
1081       if (formats[i] == MESA_FORMAT_B5G6R5_UNORM) {
1082          depth_bits[1] = 16;
1083          stencil_bits[1] = 0;
1084       } else {
1085          depth_bits[1] = 24;
1086          stencil_bits[1] = 8;
1087       }
1088
1089       new_configs = driCreateConfigs(formats[i],
1090                                      depth_bits,
1091                                      stencil_bits,
1092                                      num_depth_stencil_bits,
1093                                      back_buffer_modes, 2,
1094                                      singlesample_samples, 1,
1095                                      false, false);
1096       configs = driConcatConfigs(configs, new_configs);
1097    }
1098
1099    /* Generate the minimum possible set of configs that include an
1100     * accumulation buffer.
1101     */
1102    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1103       __DRIconfig **new_configs;
1104
1105       if (formats[i] == MESA_FORMAT_B5G6R5_UNORM) {
1106          depth_bits[0] = 16;
1107          stencil_bits[0] = 0;
1108       } else {
1109          depth_bits[0] = 24;
1110          stencil_bits[0] = 8;
1111       }
1112
1113       new_configs = driCreateConfigs(formats[i],
1114                                      depth_bits, stencil_bits, 1,
1115                                      back_buffer_modes, 1,
1116                                      singlesample_samples, 1,
1117                                      true, false);
1118       configs = driConcatConfigs(configs, new_configs);
1119    }
1120
1121    if (configs == NULL) {
1122       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
1123               __LINE__);
1124       return NULL;
1125    }
1126
1127    return configs;
1128 }
1129
1130 static void
1131 set_max_gl_versions(struct intel_screen *screen)
1132 {
1133    __DRIscreen *psp = screen->driScrnPriv;
1134
1135    switch (screen->gen) {
1136    case 3: {
1137       bool has_fragment_shader = driQueryOptionb(&screen->optionCache, "fragment_shader");
1138       bool has_occlusion_query = driQueryOptionb(&screen->optionCache, "stub_occlusion_query");
1139
1140       psp->max_gl_core_version = 0;
1141       psp->max_gl_es1_version = 11;
1142       psp->max_gl_es2_version = 20;
1143
1144       if (has_fragment_shader && has_occlusion_query) {
1145          psp->max_gl_compat_version = 21;
1146       } else {
1147          psp->max_gl_compat_version = 14;
1148       }
1149       break;
1150    }
1151    case 2:
1152       psp->max_gl_core_version = 0;
1153       psp->max_gl_compat_version = 13;
1154       psp->max_gl_es1_version = 11;
1155       psp->max_gl_es2_version = 0;
1156       break;
1157    default:
1158       assert(!"unrecognized intel_screen::gen");
1159       break;
1160    }
1161 }
1162
1163 /**
1164  * This is the driver specific part of the createNewScreen entry point.
1165  * Called when using DRI2.
1166  *
1167  * \return the struct gl_config supported by this driver
1168  */
1169 static const
1170 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
1171 {
1172    struct intel_screen *intelScreen;
1173
1174    if (psp->image.loader) {
1175    } else if (psp->dri2.loader->base.version <= 2 ||
1176        psp->dri2.loader->getBuffersWithFormat == NULL) {
1177       fprintf(stderr,
1178               "\nERROR!  DRI2 loader with getBuffersWithFormat() "
1179               "support required\n");
1180       return false;
1181    }
1182
1183    /* Allocate the private area */
1184    intelScreen = calloc(1, sizeof *intelScreen);
1185    if (!intelScreen) {
1186       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
1187       return false;
1188    }
1189    /* parse information in __driConfigOptions */
1190    driParseOptionInfo(&intelScreen->optionCache, i915_config_options.xml);
1191
1192    intelScreen->driScrnPriv = psp;
1193    psp->driverPrivate = (void *) intelScreen;
1194
1195    if (!intel_init_bufmgr(intelScreen))
1196        return false;
1197
1198    intelScreen->deviceID = drm_intel_bufmgr_gem_get_devid(intelScreen->bufmgr);
1199
1200    if (IS_GEN3(intelScreen->deviceID)) {
1201       intelScreen->gen = 3;
1202    } else {
1203       intelScreen->gen = 2;
1204    }
1205
1206    intelScreen->hw_has_swizzling = intel_detect_swizzling(intelScreen);
1207
1208    set_max_gl_versions(intelScreen);
1209
1210    psp->extensions = intelScreenExtensions;
1211
1212    return (const __DRIconfig**) intel_screen_make_configs(psp);
1213 }
1214
1215 struct intel_buffer {
1216    __DRIbuffer base;
1217    struct intel_region *region;
1218 };
1219
1220 static __DRIbuffer *
1221 intelAllocateBuffer(__DRIscreen *screen,
1222                     unsigned attachment, unsigned format,
1223                     int width, int height)
1224 {
1225    struct intel_buffer *intelBuffer;
1226    struct intel_screen *intelScreen = screen->driverPrivate;
1227
1228    assert(attachment == __DRI_BUFFER_FRONT_LEFT ||
1229           attachment == __DRI_BUFFER_BACK_LEFT);
1230
1231    intelBuffer = calloc(1, sizeof *intelBuffer);
1232    if (intelBuffer == NULL)
1233       return NULL;
1234
1235    /* The front and back buffers are color buffers, which are X tiled. */
1236    intelBuffer->region = intel_region_alloc(intelScreen,
1237                                             I915_TILING_X,
1238                                             format / 8,
1239                                             width,
1240                                             height,
1241                                             true);
1242
1243    if (intelBuffer->region == NULL) {
1244            free(intelBuffer);
1245            return NULL;
1246    }
1247
1248    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
1249
1250    intelBuffer->base.attachment = attachment;
1251    intelBuffer->base.cpp = intelBuffer->region->cpp;
1252    intelBuffer->base.pitch = intelBuffer->region->pitch;
1253
1254    return &intelBuffer->base;
1255 }
1256
1257 static void
1258 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
1259 {
1260    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
1261
1262    intel_region_release(&intelBuffer->region);
1263    free(intelBuffer);
1264 }
1265
1266
1267 static const struct __DriverAPIRec i915_driver_api = {
1268    .InitScreen           = intelInitScreen2,
1269    .DestroyScreen        = intelDestroyScreen,
1270    .CreateContext        = intelCreateContext,
1271    .DestroyContext       = intelDestroyContext,
1272    .CreateBuffer         = intelCreateBuffer,
1273    .DestroyBuffer        = intelDestroyBuffer,
1274    .MakeCurrent          = intelMakeCurrent,
1275    .UnbindContext        = intelUnbindContext,
1276    .AllocateBuffer       = intelAllocateBuffer,
1277    .ReleaseBuffer        = intelReleaseBuffer
1278 };
1279
1280 static const struct __DRIDriverVtableExtensionRec i915_vtable = {
1281    .base = { __DRI_DRIVER_VTABLE, 1 },
1282    .vtable = &i915_driver_api,
1283 };
1284
1285 /* This is the table of extensions that the loader will dlsym() for. */
1286 static const __DRIextension *i915_driver_extensions[] = {
1287     &driCoreExtension.base,
1288     &driImageDriverExtension.base,
1289     &driDRI2Extension.base,
1290     &i915_vtable.base,
1291     &i915_config_options.base,
1292     NULL
1293 };
1294
1295 PUBLIC const __DRIextension **__driDriverGetExtensions_i915(void)
1296 {
1297    globalDriverAPI = &i915_driver_api;
1298
1299    return i915_driver_extensions;
1300 }