src/mesa/drivers/dri/i965/intel_screen.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <errno.h>
  29 #include <time.h>
  30 #include "main/glheader.h"
  31 #include "main/context.h"
  32 #include "main/framebuffer.h"
  33 #include "main/renderbuffer.h"
  34 #include "main/texobj.h"
  35 #include "main/hash.h"
  36 #include "main/fbobject.h"
  37 #include "main/version.h"
  38 #include "swrast/s_renderbuffer.h"
  39
  40 #include "utils.h"
  41 #include "xmlpool.h"
  42
  43 PUBLIC const char __driConfigOptions[] =
  44    DRI_CONF_BEGIN
  45    DRI_CONF_SECTION_PERFORMANCE
  46       DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
  47       /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
  48        * DRI_CONF_BO_REUSE_ALL
  49        */
  50       DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
  51          DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
  52             DRI_CONF_ENUM(0, "Disable buffer object reuse")
  53             DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
  54          DRI_CONF_DESC_END
  55       DRI_CONF_OPT_END
  56
  57       DRI_CONF_OPT_BEGIN_B(hiz, "true")
  58          DRI_CONF_DESC(en, "Enable Hierarchical Z on gen6+")
  59       DRI_CONF_OPT_END
  60
  61    DRI_CONF_SECTION_END
  62    DRI_CONF_SECTION_QUALITY
  63       DRI_CONF_FORCE_S3TC_ENABLE("false")
  64    DRI_CONF_SECTION_END
  65    DRI_CONF_SECTION_DEBUG
  66       DRI_CONF_NO_RAST("false")
  67       DRI_CONF_ALWAYS_FLUSH_BATCH("false")
  68       DRI_CONF_ALWAYS_FLUSH_CACHE("false")
  69       DRI_CONF_DISABLE_THROTTLING("false")
  70       DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN("false")
  71       DRI_CONF_DISABLE_GLSL_LINE_CONTINUATIONS("false")
  72       DRI_CONF_DISABLE_BLEND_FUNC_EXTENDED("false")
  73
  74       DRI_CONF_OPT_BEGIN_B(shader_precompile, "true")
  75          DRI_CONF_DESC(en, "Perform code generation at shader link time.")
  76       DRI_CONF_OPT_END
  77    DRI_CONF_SECTION_END
  78 DRI_CONF_END;
  79
  80 #include "intel_batchbuffer.h"
  81 #include "intel_buffers.h"
  82 #include "intel_bufmgr.h"
  83 #include "intel_chipset.h"
  84 #include "intel_fbo.h"
  85 #include "intel_mipmap_tree.h"
  86 #include "intel_screen.h"
  87 #include "intel_tex.h"
  88 #include "intel_regions.h"
  89
  90 #include "brw_context.h"
  91
  92 #include "i915_drm.h"
  93
  94 #ifdef USE_NEW_INTERFACE
  95 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
  96 #endif /*USE_NEW_INTERFACE */
  97
  98 /**
  99  * For debugging purposes, this returns a time in seconds.
 100  */
 101 double
 102 get_time(void)
 103 {
 104    struct timespec tp;
 105
 106    clock_gettime(CLOCK_MONOTONIC, &tp);
 107
 108    return tp.tv_sec + tp.tv_nsec / 1000000000.0;
 109 }
 110
 111 void
 112 aub_dump_bmp(struct gl_context *ctx)
 113 {
 114    struct gl_framebuffer *fb = ctx->DrawBuffer;
 115
 116    for (int i = 0; i < fb->_NumColorDrawBuffers; i++) {
 117       struct intel_renderbuffer *irb =
 118          intel_renderbuffer(fb->_ColorDrawBuffers[i]);
 119
 120       if (irb && irb->mt) {
 121          enum aub_dump_bmp_format format;
 122
 123          switch (irb->Base.Base.Format) {
 124          case MESA_FORMAT_ARGB8888:
 125          case MESA_FORMAT_XRGB8888:
 126             format = AUB_DUMP_BMP_FORMAT_ARGB_8888;
 127             break;
 128          default:
 129             continue;
 130          }
 131
 132          assert(irb->mt->region->pitch % irb->mt->region->cpp == 0);
 133          drm_intel_gem_bo_aub_dump_bmp(irb->mt->region->bo,
 134                                        irb->draw_x,
 135                                        irb->draw_y,
 136                                        irb->Base.Base.Width,
 137                                        irb->Base.Base.Height,
 138                                        format,
 139                                        irb->mt->region->pitch,
 140                                        0);
 141       }
 142    }
 143 }
 144
 145 static const __DRItexBufferExtension intelTexBufferExtension = {
 146    .base = { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 147
 148    .setTexBuffer        = intelSetTexBuffer,
 149    .setTexBuffer2       = intelSetTexBuffer2,
 150    .releaseTexBuffer    = NULL,
 151 };
 152
 153 static void
 154 intelDRI2Flush(__DRIdrawable *drawable)
 155 {
 156    GET_CURRENT_CONTEXT(ctx);
 157    struct brw_context *brw = brw_context(ctx);
 158    if (brw == NULL)
 159       return;
 160
 161    intel_resolve_for_dri2_flush(brw, drawable);
 162    brw->need_throttle = true;
 163
 164    if (brw->batch.used)
 165       intel_batchbuffer_flush(brw);
 166
 167    if (INTEL_DEBUG & DEBUG_AUB) {
 168       aub_dump_bmp(ctx);
 169    }
 170 }
 171
 172 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 173     .base = { __DRI2_FLUSH, 3 },
 174
 175     .flush              = intelDRI2Flush,
 176     .invalidate         = dri2InvalidateDrawable,
 177 };
 178
 179 static struct intel_image_format intel_image_formats[] = {
 180    { __DRI_IMAGE_FOURCC_ARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
 181      { { 0, 0, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } },
 182
 183    { __DRI_IMAGE_FOURCC_XRGB8888, __DRI_IMAGE_COMPONENTS_RGB, 1,
 184      { { 0, 0, 0, __DRI_IMAGE_FORMAT_XRGB8888, 4 }, } },
 185
 186    { __DRI_IMAGE_FOURCC_YUV410, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 187      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 188        { 1, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 },
 189        { 2, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 } } },
 190
 191    { __DRI_IMAGE_FOURCC_YUV411, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 192      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 193        { 1, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 194        { 2, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 195
 196    { __DRI_IMAGE_FOURCC_YUV420, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 197      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 198        { 1, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 },
 199        { 2, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 } } },
 200
 201    { __DRI_IMAGE_FOURCC_YUV422, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 202      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 203        { 1, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 204        { 2, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 205
 206    { __DRI_IMAGE_FOURCC_YUV444, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 207      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 208        { 1, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 209        { 2, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 210
 211    { __DRI_IMAGE_FOURCC_NV12, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 212      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 213        { 1, 1, 1, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 214
 215    { __DRI_IMAGE_FOURCC_NV16, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 216      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 217        { 1, 1, 0, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 218
 219    /* For YUYV buffers, we set up two overlapping DRI images and treat
 220     * them as planar buffers in the compositors.  Plane 0 is GR88 and
 221     * samples YU or YV pairs and places Y into the R component, while
 222     * plane 1 is ARGB and samples YUYV clusters and places pairs and
 223     * places U into the G component and V into A.  This lets the
 224     * texture sampler interpolate the Y components correctly when
 225     * sampling from plane 0, and interpolate U and V correctly when
 226     * sampling from plane 1. */
 227    { __DRI_IMAGE_FOURCC_YUYV, __DRI_IMAGE_COMPONENTS_Y_XUXV, 2,
 228      { { 0, 0, 0, __DRI_IMAGE_FORMAT_GR88, 2 },
 229        { 0, 1, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } }
 230 };
 231
 232 static struct intel_image_format *
 233 intel_image_format_lookup(int fourcc)
 234 {
 235    struct intel_image_format *f = NULL;
 236
 237    for (unsigned i = 0; i < ARRAY_SIZE(intel_image_formats); i++) {
 238       if (intel_image_formats[i].fourcc == fourcc) {
 239          f = &intel_image_formats[i];
 240          break;
 241       }
 242    }
 243
 244    return f;
 245 }
 246
 247 static __DRIimage *
 248 intel_allocate_image(int dri_format, void *loaderPrivate)
 249 {
 250     __DRIimage *image;
 251
 252     image = calloc(1, sizeof *image);
 253     if (image == NULL)
 254         return NULL;
 255
 256     image->dri_format = dri_format;
 257     image->offset = 0;
 258
 259     switch (dri_format) {
 260     case __DRI_IMAGE_FORMAT_RGB565:
 261        image->format = MESA_FORMAT_RGB565;
 262        break;
 263     case __DRI_IMAGE_FORMAT_XRGB8888:
 264        image->format = MESA_FORMAT_XRGB8888;
 265        break;
 266     case __DRI_IMAGE_FORMAT_ARGB8888:
 267        image->format = MESA_FORMAT_ARGB8888;
 268        break;
 269     case __DRI_IMAGE_FORMAT_ABGR8888:
 270        image->format = MESA_FORMAT_RGBA8888_REV;
 271        break;
 272     case __DRI_IMAGE_FORMAT_XBGR8888:
 273        image->format = MESA_FORMAT_RGBX8888_REV;
 274        break;
 275     case __DRI_IMAGE_FORMAT_R8:
 276        image->format = MESA_FORMAT_R8;
 277        break;
 278     case __DRI_IMAGE_FORMAT_GR88:
 279        image->format = MESA_FORMAT_GR88;
 280        break;
 281     case __DRI_IMAGE_FORMAT_NONE:
 282        image->format = MESA_FORMAT_NONE;
 283        break;
 284     default:
 285        free(image);
 286        return NULL;
 287     }
 288
 289     image->internal_format = _mesa_get_format_base_format(image->format);
 290     image->data = loaderPrivate;
 291
 292     return image;
 293 }
 294
 295 /**
 296  * Sets up a DRIImage structure to point to our shared image in a region
 297  */
 298 static void
 299 intel_setup_image_from_mipmap_tree(struct brw_context *brw, __DRIimage *image,
 300                                    struct intel_mipmap_tree *mt, GLuint level,
 301                                    GLuint zoffset)
 302 {
 303    unsigned int draw_x, draw_y;
 304    uint32_t mask_x, mask_y;
 305
 306    intel_miptree_make_shareable(brw, mt);
 307
 308    intel_miptree_check_level_layer(mt, level, zoffset);
 309
 310    intel_region_get_tile_masks(mt->region, &mask_x, &mask_y, false);
 311    intel_miptree_get_image_offset(mt, level, zoffset, &draw_x, &draw_y);
 312
 313    image->width = mt->level[level].width;
 314    image->height = mt->level[level].height;
 315    image->tile_x = draw_x & mask_x;
 316    image->tile_y = draw_y & mask_y;
 317
 318    image->offset = intel_region_get_aligned_offset(mt->region,
 319                                                    draw_x & ~mask_x,
 320                                                    draw_y & ~mask_y,
 321                                                    false);
 322
 323    intel_region_reference(&image->region, mt->region);
 324 }
 325
 326 static void
 327 intel_setup_image_from_dimensions(__DRIimage *image)
 328 {
 329    image->width    = image->region->width;
 330    image->height   = image->region->height;
 331    image->tile_x = 0;
 332    image->tile_y = 0;
 333    image->has_depthstencil = false;
 334 }
 335
 336 static inline uint32_t
 337 intel_dri_format(GLuint format)
 338 {
 339    switch (format) {
 340    case MESA_FORMAT_RGB565:
 341       return __DRI_IMAGE_FORMAT_RGB565;
 342    case MESA_FORMAT_XRGB8888:
 343       return __DRI_IMAGE_FORMAT_XRGB8888;
 344    case MESA_FORMAT_ARGB8888:
 345       return __DRI_IMAGE_FORMAT_ARGB8888;
 346    case MESA_FORMAT_RGBA8888_REV:
 347       return __DRI_IMAGE_FORMAT_ABGR8888;
 348    case MESA_FORMAT_R8:
 349       return __DRI_IMAGE_FORMAT_R8;
 350    case MESA_FORMAT_RG88:
 351       return __DRI_IMAGE_FORMAT_GR88;
 352    }
 353
 354    return MESA_FORMAT_NONE;
 355 }
 356
 357 static __DRIimage *
 358 intel_create_image_from_name(__DRIscreen *screen,
 359                              int width, int height, int format,
 360                              int name, int pitch, void *loaderPrivate)
 361 {
 362     struct intel_screen *intelScreen = screen->driverPrivate;
 363     __DRIimage *image;
 364     int cpp;
 365
 366     image = intel_allocate_image(format, loaderPrivate);
 367     if (image == NULL)
 368        return NULL;
 369
 370     if (image->format == MESA_FORMAT_NONE)
 371        cpp = 1;
 372     else
 373        cpp = _mesa_get_format_bytes(image->format);
 374     image->region = intel_region_alloc_for_handle(intelScreen,
 375                                                   cpp, width, height,
 376                                                   pitch * cpp, name, "image");
 377     if (image->region == NULL) {
 378        free(image);
 379        return NULL;
 380     }
 381
 382     intel_setup_image_from_dimensions(image);
 383
 384     return image;
 385 }
 386
 387 static __DRIimage *
 388 intel_create_image_from_renderbuffer(__DRIcontext *context,
 389                                      int renderbuffer, void *loaderPrivate)
 390 {
 391    __DRIimage *image;
 392    struct brw_context *brw = context->driverPrivate;
 393    struct gl_context *ctx = &brw->ctx;
 394    struct gl_renderbuffer *rb;
 395    struct intel_renderbuffer *irb;
 396
 397    rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 398    if (!rb) {
 399       _mesa_error(ctx, GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 400       return NULL;
 401    }
 402
 403    irb = intel_renderbuffer(rb);
 404    intel_miptree_make_shareable(brw, irb->mt);
 405    image = calloc(1, sizeof *image);
 406    if (image == NULL)
 407       return NULL;
 408
 409    image->internal_format = rb->InternalFormat;
 410    image->format = rb->Format;
 411    image->offset = 0;
 412    image->data = loaderPrivate;
 413    intel_region_reference(&image->region, irb->mt->region);
 414    intel_setup_image_from_dimensions(image);
 415    image->dri_format = intel_dri_format(image->format);
 416    image->has_depthstencil = irb->mt->stencil_mt? true : false;
 417
 418    rb->NeedsFinishRenderTexture = true;
 419    return image;
 420 }
 421
 422 static __DRIimage *
 423 intel_create_image_from_texture(__DRIcontext *context, int target,
 424                                 unsigned texture, int zoffset,
 425                                 int level,
 426                                 unsigned *error,
 427                                 void *loaderPrivate)
 428 {
 429    __DRIimage *image;
 430    struct brw_context *brw = context->driverPrivate;
 431    struct gl_texture_object *obj;
 432    struct intel_texture_object *iobj;
 433    GLuint face = 0;
 434
 435    obj = _mesa_lookup_texture(&brw->ctx, texture);
 436    if (!obj || obj->Target != target) {
 437       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 438       return NULL;
 439    }
 440
 441    if (target == GL_TEXTURE_CUBE_MAP)
 442       face = zoffset;
 443
 444    _mesa_test_texobj_completeness(&brw->ctx, obj);
 445    iobj = intel_texture_object(obj);
 446    if (!obj->_BaseComplete || (level > 0 && !obj->_MipmapComplete)) {
 447       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 448       return NULL;
 449    }
 450
 451    if (level < obj->BaseLevel || level > obj->_MaxLevel) {
 452       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 453       return NULL;
 454    }
 455
 456    if (target == GL_TEXTURE_3D && obj->Image[face][level]->Depth < zoffset) {
 457       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 458       return NULL;
 459    }
 460    image = calloc(1, sizeof *image);
 461    if (image == NULL) {
 462       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
 463       return NULL;
 464    }
 465
 466    image->internal_format = obj->Image[face][level]->InternalFormat;
 467    image->format = obj->Image[face][level]->TexFormat;
 468    image->data = loaderPrivate;
 469    intel_setup_image_from_mipmap_tree(brw, image, iobj->mt, level, zoffset);
 470    image->dri_format = intel_dri_format(image->format);
 471    image->has_depthstencil = iobj->mt->stencil_mt? true : false;
 472    if (image->dri_format == MESA_FORMAT_NONE) {
 473       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 474       free(image);
 475       return NULL;
 476    }
 477
 478    *error = __DRI_IMAGE_ERROR_SUCCESS;
 479    return image;
 480 }
 481
 482 static void
 483 intel_destroy_image(__DRIimage *image)
 484 {
 485     intel_region_release(&image->region);
 486     free(image);
 487 }
 488
 489 static __DRIimage *
 490 intel_create_image(__DRIscreen *screen,
 491                    int width, int height, int format,
 492                    unsigned int use,
 493                    void *loaderPrivate)
 494 {
 495    __DRIimage *image;
 496    struct intel_screen *intelScreen = screen->driverPrivate;
 497    uint32_t tiling;
 498    int cpp;
 499
 500    tiling = I915_TILING_X;
 501    if (use & __DRI_IMAGE_USE_CURSOR) {
 502       if (width != 64 || height != 64)
 503          return NULL;
 504       tiling = I915_TILING_NONE;
 505    }
 506
 507    image = intel_allocate_image(format, loaderPrivate);
 508    if (image == NULL)
 509       return NULL;
 510
 511    cpp = _mesa_get_format_bytes(image->format);
 512    image->region =
 513       intel_region_alloc(intelScreen, tiling, cpp, width, height, true);
 514    if (image->region == NULL) {
 515       free(image);
 516       return NULL;
 517    }
 518
 519    intel_setup_image_from_dimensions(image);
 520
 521    return image;
 522 }
 523
 524 static GLboolean
 525 intel_query_image(__DRIimage *image, int attrib, int *value)
 526 {
 527    switch (attrib) {
 528    case __DRI_IMAGE_ATTRIB_STRIDE:
 529       *value = image->region->pitch;
 530       return true;
 531    case __DRI_IMAGE_ATTRIB_HANDLE:
 532       *value = image->region->bo->handle;
 533       return true;
 534    case __DRI_IMAGE_ATTRIB_NAME:
 535       return intel_region_flink(image->region, (uint32_t *) value);
 536    case __DRI_IMAGE_ATTRIB_FORMAT:
 537       *value = image->dri_format;
 538       return true;
 539    case __DRI_IMAGE_ATTRIB_WIDTH:
 540       *value = image->region->width;
 541       return true;
 542    case __DRI_IMAGE_ATTRIB_HEIGHT:
 543       *value = image->region->height;
 544       return true;
 545    case __DRI_IMAGE_ATTRIB_COMPONENTS:
 546       if (image->planar_format == NULL)
 547          return false;
 548       *value = image->planar_format->components;
 549       return true;
 550    case __DRI_IMAGE_ATTRIB_FD:
 551       if (drm_intel_bo_gem_export_to_prime(image->region->bo, value) == 0)
 552          return true;
 553       return false;
 554   default:
 555       return false;
 556    }
 557 }
 558
 559 static __DRIimage *
 560 intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
 561 {
 562    __DRIimage *image;
 563
 564    image = calloc(1, sizeof *image);
 565    if (image == NULL)
 566       return NULL;
 567
 568    intel_region_reference(&image->region, orig_image->region);
 569    if (image->region == NULL) {
 570       free(image);
 571       return NULL;
 572    }
 573
 574    image->internal_format = orig_image->internal_format;
 575    image->planar_format   = orig_image->planar_format;
 576    image->dri_format      = orig_image->dri_format;
 577    image->format          = orig_image->format;
 578    image->offset          = orig_image->offset;
 579    image->width           = orig_image->width;
 580    image->height          = orig_image->height;
 581    image->tile_x          = orig_image->tile_x;
 582    image->tile_y          = orig_image->tile_y;
 583    image->has_depthstencil = orig_image->has_depthstencil;
 584    image->data            = loaderPrivate;
 585
 586    memcpy(image->strides, orig_image->strides, sizeof(image->strides));
 587    memcpy(image->offsets, orig_image->offsets, sizeof(image->offsets));
 588
 589    return image;
 590 }
 591
 592 static GLboolean
 593 intel_validate_usage(__DRIimage *image, unsigned int use)
 594 {
 595    if (use & __DRI_IMAGE_USE_CURSOR) {
 596       if (image->region->width != 64 || image->region->height != 64)
 597          return GL_FALSE;
 598    }
 599
 600    return GL_TRUE;
 601 }
 602
 603 static __DRIimage *
 604 intel_create_image_from_names(__DRIscreen *screen,
 605                               int width, int height, int fourcc,
 606                               int *names, int num_names,
 607                               int *strides, int *offsets,
 608                               void *loaderPrivate)
 609 {
 610     struct intel_image_format *f = NULL;
 611     __DRIimage *image;
 612     int i, index;
 613
 614     if (screen == NULL || names == NULL || num_names != 1)
 615         return NULL;
 616
 617     f = intel_image_format_lookup(fourcc);
 618     if (f == NULL)
 619         return NULL;
 620
 621     image = intel_create_image_from_name(screen, width, height,
 622                                          __DRI_IMAGE_FORMAT_NONE,
 623                                          names[0], strides[0],
 624                                          loaderPrivate);
 625
 626    if (image == NULL)
 627       return NULL;
 628
 629     image->planar_format = f;
 630     for (i = 0; i < f->nplanes; i++) {
 631         index = f->planes[i].buffer_index;
 632         image->offsets[index] = offsets[index];
 633         image->strides[index] = strides[index];
 634     }
 635
 636     return image;
 637 }
 638
 639 static __DRIimage *
 640 intel_create_image_from_fds(__DRIscreen *screen,
 641                             int width, int height, int fourcc,
 642                             int *fds, int num_fds, int *strides, int *offsets,
 643                             void *loaderPrivate)
 644 {
 645    struct intel_screen *intelScreen = screen->driverPrivate;
 646    struct intel_image_format *f;
 647    __DRIimage *image;
 648    int i, index;
 649
 650    if (fds == NULL || num_fds != 1)
 651       return NULL;
 652
 653    f = intel_image_format_lookup(fourcc);
 654    if (f == NULL)
 655       return NULL;
 656
 657    if (f->nplanes == 1)
 658       image = intel_allocate_image(f->planes[0].dri_format, loaderPrivate);
 659    else
 660       image = intel_allocate_image(__DRI_IMAGE_FORMAT_NONE, loaderPrivate);
 661
 662    if (image == NULL)
 663       return NULL;
 664
 665    image->region = intel_region_alloc_for_fd(intelScreen,
 666                                              1, width, height,
 667                                              strides[0], fds[0], "image");
 668    if (image->region == NULL) {
 669       free(image);
 670       return NULL;
 671    }
 672
 673    image->planar_format = f;
 674    for (i = 0; i < f->nplanes; i++) {
 675       index = f->planes[i].buffer_index;
 676       image->offsets[index] = offsets[index];
 677       image->strides[index] = strides[index];
 678    }
 679
 680    intel_setup_image_from_dimensions(image);
 681
 682    return image;
 683 }
 684
 685 static __DRIimage *
 686 intel_create_image_from_dma_bufs(__DRIscreen *screen,
 687                                  int width, int height, int fourcc,
 688                                  int *fds, int num_fds,
 689                                  int *strides, int *offsets,
 690                                  enum __DRIYUVColorSpace yuv_color_space,
 691                                  enum __DRISampleRange sample_range,
 692                                  enum __DRIChromaSiting horizontal_siting,
 693                                  enum __DRIChromaSiting vertical_siting,
 694                                  unsigned *error,
 695                                  void *loaderPrivate)
 696 {
 697    __DRIimage *image;
 698    struct intel_image_format *f = intel_image_format_lookup(fourcc);
 699
 700    /* For now only packed formats that have native sampling are supported. */
 701    if (!f || f->nplanes != 1) {
 702       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 703       return NULL;
 704    }
 705
 706    image = intel_create_image_from_fds(screen, width, height, fourcc, fds,
 707                                        num_fds, strides, offsets,
 708                                        loaderPrivate);
 709
 710    /*
 711     * Invalid parameters and any inconsistencies between are assumed to be
 712     * checked by the caller. Therefore besides unsupported formats one can fail
 713     * only in allocation.
 714     */
 715    if (!image) {
 716       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
 717       return NULL;
 718    }
 719
 720    image->dma_buf_imported = true;
 721    image->yuv_color_space = yuv_color_space;
 722    image->sample_range = sample_range;
 723    image->horizontal_siting = horizontal_siting;
 724    image->vertical_siting = vertical_siting;
 725
 726    *error = __DRI_IMAGE_ERROR_SUCCESS;
 727    return image;
 728 }
 729
 730 static __DRIimage *
 731 intel_from_planar(__DRIimage *parent, int plane, void *loaderPrivate)
 732 {
 733     int width, height, offset, stride, dri_format, index;
 734     struct intel_image_format *f;
 735     uint32_t mask_x, mask_y;
 736     __DRIimage *image;
 737
 738     if (parent == NULL || parent->planar_format == NULL)
 739         return NULL;
 740
 741     f = parent->planar_format;
 742
 743     if (plane >= f->nplanes)
 744         return NULL;
 745
 746     width = parent->region->width >> f->planes[plane].width_shift;
 747     height = parent->region->height >> f->planes[plane].height_shift;
 748     dri_format = f->planes[plane].dri_format;
 749     index = f->planes[plane].buffer_index;
 750     offset = parent->offsets[index];
 751     stride = parent->strides[index];
 752
 753     image = intel_allocate_image(dri_format, loaderPrivate);
 754     if (image == NULL)
 755        return NULL;
 756
 757     if (offset + height * stride > parent->region->bo->size) {
 758        _mesa_warning(NULL, "intel_create_sub_image: subimage out of bounds");
 759        free(image);
 760        return NULL;
 761     }
 762
 763     image->region = calloc(sizeof(*image->region), 1);
 764     if (image->region == NULL) {
 765        free(image);
 766        return NULL;
 767     }
 768
 769     image->region->cpp = _mesa_get_format_bytes(image->format);
 770     image->region->width = width;
 771     image->region->height = height;
 772     image->region->pitch = stride;
 773     image->region->refcount = 1;
 774     image->region->bo = parent->region->bo;
 775     drm_intel_bo_reference(image->region->bo);
 776     image->region->tiling = parent->region->tiling;
 777     image->offset = offset;
 778     intel_setup_image_from_dimensions(image);
 779
 780     intel_region_get_tile_masks(image->region, &mask_x, &mask_y, false);
 781     if (offset & mask_x)
 782        _mesa_warning(NULL,
 783                      "intel_create_sub_image: offset not on tile boundary");
 784
 785     return image;
 786 }
 787
 788 static struct __DRIimageExtensionRec intelImageExtension = {
 789     .base = { __DRI_IMAGE, 8 },
 790
 791     .createImageFromName                = intel_create_image_from_name,
 792     .createImageFromRenderbuffer        = intel_create_image_from_renderbuffer,
 793     .destroyImage                       = intel_destroy_image,
 794     .createImage                        = intel_create_image,
 795     .queryImage                         = intel_query_image,
 796     .dupImage                           = intel_dup_image,
 797     .validateUsage                      = intel_validate_usage,
 798     .createImageFromNames               = intel_create_image_from_names,
 799     .fromPlanar                         = intel_from_planar,
 800     .createImageFromTexture             = intel_create_image_from_texture,
 801     .createImageFromFds                 = intel_create_image_from_fds,
 802     .createImageFromDmaBufs             = intel_create_image_from_dma_bufs
 803 };
 804
 805 static const __DRIextension *intelScreenExtensions[] = {
 806     &intelTexBufferExtension.base,
 807     &intelFlushExtension.base,
 808     &intelImageExtension.base,
 809     &dri2ConfigQueryExtension.base,
 810     NULL
 811 };
 812
 813 static bool
 814 intel_get_param(__DRIscreen *psp, int param, int *value)
 815 {
 816    int ret;
 817    struct drm_i915_getparam gp;
 818
 819    memset(&gp, 0, sizeof(gp));
 820    gp.param = param;
 821    gp.value = value;
 822
 823    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 824    if (ret) {
 825       if (ret != -EINVAL)
 826          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 827       return false;
 828    }
 829
 830    return true;
 831 }
 832
 833 static bool
 834 intel_get_boolean(__DRIscreen *psp, int param)
 835 {
 836    int value = 0;
 837    return intel_get_param(psp, param, &value) && value;
 838 }
 839
 840 static void
 841 intelDestroyScreen(__DRIscreen * sPriv)
 842 {
 843    struct intel_screen *intelScreen = sPriv->driverPrivate;
 844
 845    dri_bufmgr_destroy(intelScreen->bufmgr);
 846    driDestroyOptionInfo(&intelScreen->optionCache);
 847
 848    free(intelScreen);
 849    sPriv->driverPrivate = NULL;
 850 }
 851
 852
 853 /**
 854  * This is called when we need to set up GL rendering to a new X window.
 855  */
 856 static GLboolean
 857 intelCreateBuffer(__DRIscreen * driScrnPriv,
 858                   __DRIdrawable * driDrawPriv,
 859                   const struct gl_config * mesaVis, GLboolean isPixmap)
 860 {
 861    struct intel_renderbuffer *rb;
 862    struct intel_screen *screen = (struct intel_screen*) driScrnPriv->driverPrivate;
 863    gl_format rgbFormat;
 864    unsigned num_samples = intel_quantize_num_samples(screen, mesaVis->samples);
 865    struct gl_framebuffer *fb;
 866
 867    if (isPixmap)
 868       return false;
 869
 870    fb = CALLOC_STRUCT(gl_framebuffer);
 871    if (!fb)
 872       return false;
 873
 874    _mesa_initialize_window_framebuffer(fb, mesaVis);
 875
 876    if (mesaVis->redBits == 5)
 877       rgbFormat = MESA_FORMAT_RGB565;
 878    else if (mesaVis->sRGBCapable)
 879       rgbFormat = MESA_FORMAT_SARGB8;
 880    else if (mesaVis->alphaBits == 0)
 881       rgbFormat = MESA_FORMAT_XRGB8888;
 882    else {
 883       rgbFormat = MESA_FORMAT_SARGB8;
 884       fb->Visual.sRGBCapable = true;
 885    }
 886
 887    /* setup the hardware-based renderbuffers */
 888    rb = intel_create_renderbuffer(rgbFormat, num_samples);
 889    _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base.Base);
 890
 891    if (mesaVis->doubleBufferMode) {
 892       rb = intel_create_renderbuffer(rgbFormat, num_samples);
 893       _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base.Base);
 894    }
 895
 896    /*
 897     * Assert here that the gl_config has an expected depth/stencil bit
 898     * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
 899     * which constructs the advertised configs.)
 900     */
 901    if (mesaVis->depthBits == 24) {
 902       assert(mesaVis->stencilBits == 8);
 903
 904       if (screen->hw_has_separate_stencil) {
 905          rb = intel_create_private_renderbuffer(MESA_FORMAT_X8_Z24,
 906                                                 num_samples);
 907          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 908          rb = intel_create_private_renderbuffer(MESA_FORMAT_S8,
 909                                                 num_samples);
 910          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 911       } else {
 912          /*
 913           * Use combined depth/stencil. Note that the renderbuffer is
 914           * attached to two attachment points.
 915           */
 916          rb = intel_create_private_renderbuffer(MESA_FORMAT_S8_Z24,
 917                                                 num_samples);
 918          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 919          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 920       }
 921    }
 922    else if (mesaVis->depthBits == 16) {
 923       assert(mesaVis->stencilBits == 0);
 924       rb = intel_create_private_renderbuffer(MESA_FORMAT_Z16,
 925                                              num_samples);
 926       _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 927    }
 928    else {
 929       assert(mesaVis->depthBits == 0);
 930       assert(mesaVis->stencilBits == 0);
 931    }
 932
 933    /* now add any/all software-based renderbuffers we may need */
 934    _swrast_add_soft_renderbuffers(fb,
 935                                   false, /* never sw color */
 936                                   false, /* never sw depth */
 937                                   false, /* never sw stencil */
 938                                   mesaVis->accumRedBits > 0,
 939                                   false, /* never sw alpha */
 940                                   false  /* never sw aux */ );
 941    driDrawPriv->driverPrivate = fb;
 942
 943    return true;
 944 }
 945
 946 static void
 947 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 948 {
 949     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 950
 951     _mesa_reference_framebuffer(&fb, NULL);
 952 }
 953
 954 static GLboolean
 955 intelCreateContext(gl_api api,
 956                    const struct gl_config * mesaVis,
 957                    __DRIcontext * driContextPriv,
 958                    unsigned major_version,
 959                    unsigned minor_version,
 960                    uint32_t flags,
 961                    unsigned *error,
 962                    void *sharedContextPrivate)
 963 {
 964    bool success = false;
 965
 966    success = brwCreateContext(api, mesaVis,
 967                               driContextPriv,
 968                               major_version, minor_version, flags,
 969                               error, sharedContextPrivate);
 970
 971    if (success)
 972       return true;
 973
 974    if (driContextPriv->driverPrivate != NULL)
 975       intelDestroyContext(driContextPriv);
 976
 977    return false;
 978 }
 979
 980 static bool
 981 intel_init_bufmgr(struct intel_screen *intelScreen)
 982 {
 983    __DRIscreen *spriv = intelScreen->driScrnPriv;
 984
 985    intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
 986
 987    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 988    if (intelScreen->bufmgr == NULL) {
 989       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 990               __func__, __LINE__);
 991       return false;
 992    }
 993
 994    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 995
 996    if (!intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA)) {
 997       fprintf(stderr, "[%s: %u] Kernel 2.6.39 required.\n", __func__, __LINE__);
 998       return false;
 999    }
1000
1001    return true;
1002 }
1003
1004 /**
1005  * Override intel_screen.hw_has_separate_stencil with environment variable
1006  * INTEL_SEPARATE_STENCIL.
1007  *
1008  * Valid values for INTEL_SEPARATE_STENCIL are "0" and "1". If an invalid
1009  * valid value is encountered, a warning is emitted and INTEL_SEPARATE_STENCIL
1010  * is ignored.
1011  */
1012 static void
1013 intel_override_separate_stencil(struct intel_screen *screen)
1014 {
1015    const char *s = getenv("INTEL_SEPARATE_STENCIL");
1016    if (!s) {
1017       return;
1018    } else if (!strncmp("0", s, 2)) {
1019       screen->hw_has_separate_stencil = false;
1020    } else if (!strncmp("1", s, 2)) {
1021       screen->hw_has_separate_stencil = true;
1022    } else {
1023       fprintf(stderr,
1024               "warning: env variable INTEL_SEPARATE_STENCIL=\"%s\" has "
1025               "invalid value and is ignored", s);
1026    }
1027 }
1028
1029 static bool
1030 intel_detect_swizzling(struct intel_screen *screen)
1031 {
1032    drm_intel_bo *buffer;
1033    unsigned long flags = 0;
1034    unsigned long aligned_pitch;
1035    uint32_t tiling = I915_TILING_X;
1036    uint32_t swizzle_mode = 0;
1037
1038    buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "swizzle test",
1039                                      64, 64, 4,
1040                                      &tiling, &aligned_pitch, flags);
1041    if (buffer == NULL)
1042       return false;
1043
1044    drm_intel_bo_get_tiling(buffer, &tiling, &swizzle_mode);
1045    drm_intel_bo_unreference(buffer);
1046
1047    if (swizzle_mode == I915_BIT_6_SWIZZLE_NONE)
1048       return false;
1049    else
1050       return true;
1051 }
1052
1053 static __DRIconfig**
1054 intel_screen_make_configs(__DRIscreen *dri_screen)
1055 {
1056    static const gl_format formats[] = {
1057       MESA_FORMAT_RGB565,
1058       MESA_FORMAT_ARGB8888
1059    };
1060
1061    /* GLX_SWAP_COPY_OML is not supported due to page flipping. */
1062    static const GLenum back_buffer_modes[] = {
1063        GLX_SWAP_UNDEFINED_OML, GLX_NONE,
1064    };
1065
1066    static const uint8_t singlesample_samples[1] = {0};
1067    static const uint8_t multisample_samples[2]  = {4, 8};
1068
1069    struct intel_screen *screen = dri_screen->driverPrivate;
1070    uint8_t depth_bits[4], stencil_bits[4];
1071    __DRIconfig **configs = NULL;
1072
1073    /* Generate singlesample configs without accumulation buffer. */
1074    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1075       __DRIconfig **new_configs;
1076       int num_depth_stencil_bits = 2;
1077
1078       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
1079        * buffer that has a different number of bits per pixel than the color
1080        * buffer, gen >= 6 supports this.
1081        */
1082       depth_bits[0] = 0;
1083       stencil_bits[0] = 0;
1084
1085       if (formats[i] == MESA_FORMAT_RGB565) {
1086          depth_bits[1] = 16;
1087          stencil_bits[1] = 0;
1088          if (screen->gen >= 6) {
1089              depth_bits[2] = 24;
1090              stencil_bits[2] = 8;
1091              num_depth_stencil_bits = 3;
1092          }
1093       } else {
1094          depth_bits[1] = 24;
1095          stencil_bits[1] = 8;
1096       }
1097
1098       new_configs = driCreateConfigs(formats[i],
1099                                      depth_bits,
1100                                      stencil_bits,
1101                                      num_depth_stencil_bits,
1102                                      back_buffer_modes, 2,
1103                                      singlesample_samples, 1,
1104                                      false);
1105       configs = driConcatConfigs(configs, new_configs);
1106    }
1107
1108    /* Generate the minimum possible set of configs that include an
1109     * accumulation buffer.
1110     */
1111    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1112       __DRIconfig **new_configs;
1113
1114       if (formats[i] == MESA_FORMAT_RGB565) {
1115          depth_bits[0] = 16;
1116          stencil_bits[0] = 0;
1117       } else {
1118          depth_bits[0] = 24;
1119          stencil_bits[0] = 8;
1120       }
1121
1122       new_configs = driCreateConfigs(formats[i],
1123                                      depth_bits, stencil_bits, 1,
1124                                      back_buffer_modes, 1,
1125                                      singlesample_samples, 1,
1126                                      true);
1127       configs = driConcatConfigs(configs, new_configs);
1128    }
1129
1130    /* Generate multisample configs.
1131     *
1132     * This loop breaks early, and hence is a no-op, on gen < 6.
1133     *
1134     * Multisample configs must follow the singlesample configs in order to
1135     * work around an X server bug present in 1.12. The X server chooses to
1136     * associate the first listed RGBA888-Z24S8 config, regardless of its
1137     * sample count, with the 32-bit depth visual used for compositing.
1138     *
1139     * Only doublebuffer configs with GLX_SWAP_UNDEFINED_OML behavior are
1140     * supported.  Singlebuffer configs are not supported because no one wants
1141     * them.
1142     */
1143    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1144       if (screen->gen < 6)
1145          break;
1146
1147       __DRIconfig **new_configs;
1148       const int num_depth_stencil_bits = 2;
1149       int num_msaa_modes = 0;
1150
1151       depth_bits[0] = 0;
1152       stencil_bits[0] = 0;
1153
1154       if (formats[i] == MESA_FORMAT_RGB565) {
1155          depth_bits[1] = 16;
1156          stencil_bits[1] = 0;
1157       } else {
1158          depth_bits[1] = 24;
1159          stencil_bits[1] = 8;
1160       }
1161
1162       if (screen->gen >= 7)
1163          num_msaa_modes = 2;
1164       else if (screen->gen == 6)
1165          num_msaa_modes = 1;
1166
1167       new_configs = driCreateConfigs(formats[i],
1168                                      depth_bits,
1169                                      stencil_bits,
1170                                      num_depth_stencil_bits,
1171                                      back_buffer_modes, 1,
1172                                      multisample_samples,
1173                                      num_msaa_modes,
1174                                      false);
1175       configs = driConcatConfigs(configs, new_configs);
1176    }
1177
1178    if (configs == NULL) {
1179       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
1180               __LINE__);
1181       return NULL;
1182    }
1183
1184    return configs;
1185 }
1186
1187 static void
1188 set_max_gl_versions(struct intel_screen *screen)
1189 {
1190    int gl_version_override = _mesa_get_gl_version_override();
1191
1192    switch (screen->gen) {
1193    case 7:
1194       screen->max_gl_core_version = 31;
1195       screen->max_gl_compat_version = 30;
1196       screen->max_gl_es1_version = 11;
1197       screen->max_gl_es2_version = 30;
1198       break;
1199    case 6:
1200       screen->max_gl_core_version = 31;
1201       screen->max_gl_compat_version = 30;
1202       screen->max_gl_es1_version = 11;
1203       screen->max_gl_es2_version = 30;
1204       break;
1205    case 5:
1206    case 4:
1207       screen->max_gl_core_version = 0;
1208       screen->max_gl_compat_version = 21;
1209       screen->max_gl_es1_version = 11;
1210       screen->max_gl_es2_version = 20;
1211       break;
1212    default:
1213       assert(!"unrecognized intel_screen::gen");
1214       break;
1215    }
1216
1217    if (gl_version_override >= 31) {
1218       screen->max_gl_core_version = MAX2(screen->max_gl_core_version,
1219                                          gl_version_override);
1220    } else {
1221       screen->max_gl_compat_version = MAX2(screen->max_gl_compat_version,
1222                                            gl_version_override);
1223    }
1224
1225 #ifndef FEATURE_ES1
1226    screen->max_gl_es1_version = 0;
1227 #endif
1228
1229 #ifndef FEATURE_ES2
1230    screen->max_gl_es2_version = 0;
1231 #endif
1232 }
1233
1234 /**
1235  * This is the driver specific part of the createNewScreen entry point.
1236  * Called when using DRI2.
1237  *
1238  * \return the struct gl_config supported by this driver
1239  */
1240 static const
1241 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
1242 {
1243    struct intel_screen *intelScreen;
1244
1245    if (psp->dri2.loader->base.version <= 2 ||
1246        psp->dri2.loader->getBuffersWithFormat == NULL) {
1247       fprintf(stderr,
1248               "\nERROR!  DRI2 loader with getBuffersWithFormat() "
1249               "support required\n");
1250       return false;
1251    }
1252
1253    /* Allocate the private area */
1254    intelScreen = calloc(1, sizeof *intelScreen);
1255    if (!intelScreen) {
1256       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
1257       return false;
1258    }
1259    /* parse information in __driConfigOptions */
1260    driParseOptionInfo(&intelScreen->optionCache, __driConfigOptions);
1261
1262    intelScreen->driScrnPriv = psp;
1263    psp->driverPrivate = (void *) intelScreen;
1264
1265    if (!intel_init_bufmgr(intelScreen))
1266        return false;
1267
1268    intelScreen->deviceID = drm_intel_bufmgr_gem_get_devid(intelScreen->bufmgr);
1269
1270    if (IS_GEN7(intelScreen->deviceID)) {
1271       intelScreen->gen = 7;
1272    } else if (IS_GEN6(intelScreen->deviceID)) {
1273       intelScreen->gen = 6;
1274    } else if (IS_GEN5(intelScreen->deviceID)) {
1275       intelScreen->gen = 5;
1276    } else {
1277       intelScreen->gen = 4;
1278    }
1279
1280    intelScreen->hw_has_separate_stencil = intelScreen->gen >= 6;
1281    intelScreen->hw_must_use_separate_stencil = intelScreen->gen >= 7;
1282
1283    int has_llc = 0;
1284    bool success = intel_get_param(intelScreen->driScrnPriv, I915_PARAM_HAS_LLC,
1285                                   &has_llc);
1286    if (success && has_llc)
1287       intelScreen->hw_has_llc = true;
1288    else if (!success && intelScreen->gen >= 6)
1289       intelScreen->hw_has_llc = true;
1290
1291    intel_override_separate_stencil(intelScreen);
1292
1293    intelScreen->hw_has_swizzling = intel_detect_swizzling(intelScreen);
1294
1295    set_max_gl_versions(intelScreen);
1296
1297    psp->api_mask = (1 << __DRI_API_OPENGL);
1298    if (intelScreen->max_gl_core_version > 0)
1299       psp->api_mask |= (1 << __DRI_API_OPENGL_CORE);
1300    if (intelScreen->max_gl_es1_version > 0)
1301       psp->api_mask |= (1 << __DRI_API_GLES);
1302    if (intelScreen->max_gl_es2_version > 0)
1303       psp->api_mask |= (1 << __DRI_API_GLES2);
1304    if (intelScreen->max_gl_es2_version >= 30)
1305       psp->api_mask |= (1 << __DRI_API_GLES3);
1306
1307    psp->extensions = intelScreenExtensions;
1308
1309    return (const __DRIconfig**) intel_screen_make_configs(psp);
1310 }
1311
1312 struct intel_buffer {
1313    __DRIbuffer base;
1314    struct intel_region *region;
1315 };
1316
1317 static __DRIbuffer *
1318 intelAllocateBuffer(__DRIscreen *screen,
1319                     unsigned attachment, unsigned format,
1320                     int width, int height)
1321 {
1322    struct intel_buffer *intelBuffer;
1323    struct intel_screen *intelScreen = screen->driverPrivate;
1324
1325    assert(attachment == __DRI_BUFFER_FRONT_LEFT ||
1326           attachment == __DRI_BUFFER_BACK_LEFT);
1327
1328    intelBuffer = calloc(1, sizeof *intelBuffer);
1329    if (intelBuffer == NULL)
1330       return NULL;
1331
1332    /* The front and back buffers are color buffers, which are X tiled. */
1333    intelBuffer->region = intel_region_alloc(intelScreen,
1334                                             I915_TILING_X,
1335                                             format / 8,
1336                                             width,
1337                                             height,
1338                                             true);
1339
1340    if (intelBuffer->region == NULL) {
1341            free(intelBuffer);
1342            return NULL;
1343    }
1344
1345    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
1346
1347    intelBuffer->base.attachment = attachment;
1348    intelBuffer->base.cpp = intelBuffer->region->cpp;
1349    intelBuffer->base.pitch = intelBuffer->region->pitch;
1350
1351    return &intelBuffer->base;
1352 }
1353
1354 static void
1355 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
1356 {
1357    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
1358
1359    intel_region_release(&intelBuffer->region);
1360    free(intelBuffer);
1361 }
1362
1363
1364 const struct __DriverAPIRec driDriverAPI = {
1365    .InitScreen           = intelInitScreen2,
1366    .DestroyScreen        = intelDestroyScreen,
1367    .CreateContext        = intelCreateContext,
1368    .DestroyContext       = intelDestroyContext,
1369    .CreateBuffer         = intelCreateBuffer,
1370    .DestroyBuffer        = intelDestroyBuffer,
1371    .MakeCurrent          = intelMakeCurrent,
1372    .UnbindContext        = intelUnbindContext,
1373    .AllocateBuffer       = intelAllocateBuffer,
1374    .ReleaseBuffer        = intelReleaseBuffer
1375 };
1376
1377 /* This is the table of extensions that the loader will dlsym() for. */
1378 PUBLIC const __DRIextension *__driDriverExtensions[] = {
1379     &driCoreExtension.base,
1380     &driDRI2Extension.base,
1381     NULL
1382 };