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 const GLuint __driNConfigOptions = 12;
  81
  82 #include "intel_batchbuffer.h"
  83 #include "intel_buffers.h"
  84 #include "intel_bufmgr.h"
  85 #include "intel_chipset.h"
  86 #include "intel_fbo.h"
  87 #include "intel_mipmap_tree.h"
  88 #include "intel_screen.h"
  89 #include "intel_tex.h"
  90 #include "intel_regions.h"
  91
  92 #include "brw_context.h"
  93
  94 #include "i915_drm.h"
  95
  96 #ifdef USE_NEW_INTERFACE
  97 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
  98 #endif /*USE_NEW_INTERFACE */
  99
 100 /**
 101  * For debugging purposes, this returns a time in seconds.
 102  */
 103 double
 104 get_time(void)
 105 {
 106    struct timespec tp;
 107
 108    clock_gettime(CLOCK_MONOTONIC, &tp);
 109
 110    return tp.tv_sec + tp.tv_nsec / 1000000000.0;
 111 }
 112
 113 void
 114 aub_dump_bmp(struct gl_context *ctx)
 115 {
 116    struct gl_framebuffer *fb = ctx->DrawBuffer;
 117
 118    for (int i = 0; i < fb->_NumColorDrawBuffers; i++) {
 119       struct intel_renderbuffer *irb =
 120          intel_renderbuffer(fb->_ColorDrawBuffers[i]);
 121
 122       if (irb && irb->mt) {
 123          enum aub_dump_bmp_format format;
 124
 125          switch (irb->Base.Base.Format) {
 126          case MESA_FORMAT_ARGB8888:
 127          case MESA_FORMAT_XRGB8888:
 128             format = AUB_DUMP_BMP_FORMAT_ARGB_8888;
 129             break;
 130          default:
 131             continue;
 132          }
 133
 134          assert(irb->mt->region->pitch % irb->mt->region->cpp == 0);
 135          drm_intel_gem_bo_aub_dump_bmp(irb->mt->region->bo,
 136                                        irb->draw_x,
 137                                        irb->draw_y,
 138                                        irb->Base.Base.Width,
 139                                        irb->Base.Base.Height,
 140                                        format,
 141                                        irb->mt->region->pitch,
 142                                        0);
 143       }
 144    }
 145 }
 146
 147 static const __DRItexBufferExtension intelTexBufferExtension = {
 148    .base = { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 149
 150    .setTexBuffer        = intelSetTexBuffer,
 151    .setTexBuffer2       = intelSetTexBuffer2,
 152    .releaseTexBuffer    = NULL,
 153 };
 154
 155 static void
 156 intelDRI2Flush(__DRIdrawable *drawable)
 157 {
 158    GET_CURRENT_CONTEXT(ctx);
 159    struct brw_context *brw = brw_context(ctx);
 160    if (brw == NULL)
 161       return;
 162
 163    intel_resolve_for_dri2_flush(brw, drawable);
 164    brw->need_throttle = true;
 165
 166    if (brw->batch.used)
 167       intel_batchbuffer_flush(brw);
 168
 169    if (INTEL_DEBUG & DEBUG_AUB) {
 170       aub_dump_bmp(ctx);
 171    }
 172 }
 173
 174 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 175     .base = { __DRI2_FLUSH, 3 },
 176
 177     .flush              = intelDRI2Flush,
 178     .invalidate         = dri2InvalidateDrawable,
 179 };
 180
 181 static struct intel_image_format intel_image_formats[] = {
 182    { __DRI_IMAGE_FOURCC_ARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
 183      { { 0, 0, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } },
 184
 185    { __DRI_IMAGE_FOURCC_XRGB8888, __DRI_IMAGE_COMPONENTS_RGB, 1,
 186      { { 0, 0, 0, __DRI_IMAGE_FORMAT_XRGB8888, 4 }, } },
 187
 188    { __DRI_IMAGE_FOURCC_YUV410, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 189      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 190        { 1, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 },
 191        { 2, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 } } },
 192
 193    { __DRI_IMAGE_FOURCC_YUV411, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 194      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 195        { 1, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 196        { 2, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 197
 198    { __DRI_IMAGE_FOURCC_YUV420, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 199      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 200        { 1, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 },
 201        { 2, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 } } },
 202
 203    { __DRI_IMAGE_FOURCC_YUV422, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 204      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 205        { 1, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 206        { 2, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 207
 208    { __DRI_IMAGE_FOURCC_YUV444, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 209      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 210        { 1, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 211        { 2, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 212
 213    { __DRI_IMAGE_FOURCC_NV12, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 214      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 215        { 1, 1, 1, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 216
 217    { __DRI_IMAGE_FOURCC_NV16, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 218      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 219        { 1, 1, 0, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 220
 221    /* For YUYV buffers, we set up two overlapping DRI images and treat
 222     * them as planar buffers in the compositors.  Plane 0 is GR88 and
 223     * samples YU or YV pairs and places Y into the R component, while
 224     * plane 1 is ARGB and samples YUYV clusters and places pairs and
 225     * places U into the G component and V into A.  This lets the
 226     * texture sampler interpolate the Y components correctly when
 227     * sampling from plane 0, and interpolate U and V correctly when
 228     * sampling from plane 1. */
 229    { __DRI_IMAGE_FOURCC_YUYV, __DRI_IMAGE_COMPONENTS_Y_XUXV, 2,
 230      { { 0, 0, 0, __DRI_IMAGE_FORMAT_GR88, 2 },
 231        { 0, 1, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } }
 232 };
 233
 234 static struct intel_image_format *
 235 intel_image_format_lookup(int fourcc)
 236 {
 237    struct intel_image_format *f = NULL;
 238
 239    for (unsigned i = 0; i < ARRAY_SIZE(intel_image_formats); i++) {
 240       if (intel_image_formats[i].fourcc == fourcc) {
 241          f = &intel_image_formats[i];
 242          break;
 243       }
 244    }
 245
 246    return f;
 247 }
 248
 249 static __DRIimage *
 250 intel_allocate_image(int dri_format, void *loaderPrivate)
 251 {
 252     __DRIimage *image;
 253
 254     image = calloc(1, sizeof *image);
 255     if (image == NULL)
 256         return NULL;
 257
 258     image->dri_format = dri_format;
 259     image->offset = 0;
 260
 261     switch (dri_format) {
 262     case __DRI_IMAGE_FORMAT_RGB565:
 263        image->format = MESA_FORMAT_RGB565;
 264        break;
 265     case __DRI_IMAGE_FORMAT_XRGB8888:
 266        image->format = MESA_FORMAT_XRGB8888;
 267        break;
 268     case __DRI_IMAGE_FORMAT_ARGB8888:
 269        image->format = MESA_FORMAT_ARGB8888;
 270        break;
 271     case __DRI_IMAGE_FORMAT_ABGR8888:
 272        image->format = MESA_FORMAT_RGBA8888_REV;
 273        break;
 274     case __DRI_IMAGE_FORMAT_XBGR8888:
 275        image->format = MESA_FORMAT_RGBX8888_REV;
 276        break;
 277     case __DRI_IMAGE_FORMAT_R8:
 278        image->format = MESA_FORMAT_R8;
 279        break;
 280     case __DRI_IMAGE_FORMAT_GR88:
 281        image->format = MESA_FORMAT_GR88;
 282        break;
 283     case __DRI_IMAGE_FORMAT_NONE:
 284        image->format = MESA_FORMAT_NONE;
 285        break;
 286     default:
 287        free(image);
 288        return NULL;
 289     }
 290
 291     image->internal_format = _mesa_get_format_base_format(image->format);
 292     image->data = loaderPrivate;
 293
 294     return image;
 295 }
 296
 297 /**
 298  * Sets up a DRIImage structure to point to our shared image in a region
 299  */
 300 static void
 301 intel_setup_image_from_mipmap_tree(struct brw_context *brw, __DRIimage *image,
 302                                    struct intel_mipmap_tree *mt, GLuint level,
 303                                    GLuint zoffset)
 304 {
 305    unsigned int draw_x, draw_y;
 306    uint32_t mask_x, mask_y;
 307
 308    intel_miptree_make_shareable(brw, mt);
 309
 310    intel_miptree_check_level_layer(mt, level, zoffset);
 311
 312    intel_region_get_tile_masks(mt->region, &mask_x, &mask_y, false);
 313    intel_miptree_get_image_offset(mt, level, zoffset, &draw_x, &draw_y);
 314
 315    image->width = mt->level[level].width;
 316    image->height = mt->level[level].height;
 317    image->tile_x = draw_x & mask_x;
 318    image->tile_y = draw_y & mask_y;
 319
 320    image->offset = intel_region_get_aligned_offset(mt->region,
 321                                                    draw_x & ~mask_x,
 322                                                    draw_y & ~mask_y,
 323                                                    false);
 324
 325    intel_region_reference(&image->region, mt->region);
 326 }
 327
 328 static void
 329 intel_setup_image_from_dimensions(__DRIimage *image)
 330 {
 331    image->width    = image->region->width;
 332    image->height   = image->region->height;
 333    image->tile_x = 0;
 334    image->tile_y = 0;
 335    image->has_depthstencil = false;
 336 }
 337
 338 static inline uint32_t
 339 intel_dri_format(GLuint format)
 340 {
 341    switch (format) {
 342    case MESA_FORMAT_RGB565:
 343       return __DRI_IMAGE_FORMAT_RGB565;
 344    case MESA_FORMAT_XRGB8888:
 345       return __DRI_IMAGE_FORMAT_XRGB8888;
 346    case MESA_FORMAT_ARGB8888:
 347       return __DRI_IMAGE_FORMAT_ARGB8888;
 348    case MESA_FORMAT_RGBA8888_REV:
 349       return __DRI_IMAGE_FORMAT_ABGR8888;
 350    case MESA_FORMAT_R8:
 351       return __DRI_IMAGE_FORMAT_R8;
 352    case MESA_FORMAT_RG88:
 353       return __DRI_IMAGE_FORMAT_GR88;
 354    }
 355
 356    return MESA_FORMAT_NONE;
 357 }
 358
 359 static __DRIimage *
 360 intel_create_image_from_name(__DRIscreen *screen,
 361                              int width, int height, int format,
 362                              int name, int pitch, void *loaderPrivate)
 363 {
 364     struct intel_screen *intelScreen = screen->driverPrivate;
 365     __DRIimage *image;
 366     int cpp;
 367
 368     image = intel_allocate_image(format, loaderPrivate);
 369     if (image == NULL)
 370        return NULL;
 371
 372     if (image->format == MESA_FORMAT_NONE)
 373        cpp = 1;
 374     else
 375        cpp = _mesa_get_format_bytes(image->format);
 376     image->region = intel_region_alloc_for_handle(intelScreen,
 377                                                   cpp, width, height,
 378                                                   pitch * cpp, name, "image");
 379     if (image->region == NULL) {
 380        free(image);
 381        return NULL;
 382     }
 383
 384     intel_setup_image_from_dimensions(image);
 385
 386     return image;
 387 }
 388
 389 static __DRIimage *
 390 intel_create_image_from_renderbuffer(__DRIcontext *context,
 391                                      int renderbuffer, void *loaderPrivate)
 392 {
 393    __DRIimage *image;
 394    struct brw_context *brw = context->driverPrivate;
 395    struct gl_context *ctx = &brw->ctx;
 396    struct gl_renderbuffer *rb;
 397    struct intel_renderbuffer *irb;
 398
 399    rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 400    if (!rb) {
 401       _mesa_error(ctx, GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 402       return NULL;
 403    }
 404
 405    irb = intel_renderbuffer(rb);
 406    intel_miptree_make_shareable(brw, irb->mt);
 407    image = calloc(1, sizeof *image);
 408    if (image == NULL)
 409       return NULL;
 410
 411    image->internal_format = rb->InternalFormat;
 412    image->format = rb->Format;
 413    image->offset = 0;
 414    image->data = loaderPrivate;
 415    intel_region_reference(&image->region, irb->mt->region);
 416    intel_setup_image_from_dimensions(image);
 417    image->dri_format = intel_dri_format(image->format);
 418    image->has_depthstencil = irb->mt->stencil_mt? true : false;
 419
 420    rb->NeedsFinishRenderTexture = true;
 421    return image;
 422 }
 423
 424 static __DRIimage *
 425 intel_create_image_from_texture(__DRIcontext *context, int target,
 426                                 unsigned texture, int zoffset,
 427                                 int level,
 428                                 unsigned *error,
 429                                 void *loaderPrivate)
 430 {
 431    __DRIimage *image;
 432    struct brw_context *brw = context->driverPrivate;
 433    struct gl_texture_object *obj;
 434    struct intel_texture_object *iobj;
 435    GLuint face = 0;
 436
 437    obj = _mesa_lookup_texture(&brw->ctx, texture);
 438    if (!obj || obj->Target != target) {
 439       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 440       return NULL;
 441    }
 442
 443    if (target == GL_TEXTURE_CUBE_MAP)
 444       face = zoffset;
 445
 446    _mesa_test_texobj_completeness(&brw->ctx, obj);
 447    iobj = intel_texture_object(obj);
 448    if (!obj->_BaseComplete || (level > 0 && !obj->_MipmapComplete)) {
 449       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 450       return NULL;
 451    }
 452
 453    if (level < obj->BaseLevel || level > obj->_MaxLevel) {
 454       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 455       return NULL;
 456    }
 457
 458    if (target == GL_TEXTURE_3D && obj->Image[face][level]->Depth < zoffset) {
 459       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 460       return NULL;
 461    }
 462    image = calloc(1, sizeof *image);
 463    if (image == NULL) {
 464       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
 465       return NULL;
 466    }
 467
 468    image->internal_format = obj->Image[face][level]->InternalFormat;
 469    image->format = obj->Image[face][level]->TexFormat;
 470    image->data = loaderPrivate;
 471    intel_setup_image_from_mipmap_tree(brw, image, iobj->mt, level, zoffset);
 472    image->dri_format = intel_dri_format(image->format);
 473    image->has_depthstencil = iobj->mt->stencil_mt? true : false;
 474    if (image->dri_format == MESA_FORMAT_NONE) {
 475       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 476       free(image);
 477       return NULL;
 478    }
 479
 480    *error = __DRI_IMAGE_ERROR_SUCCESS;
 481    return image;
 482 }
 483
 484 static void
 485 intel_destroy_image(__DRIimage *image)
 486 {
 487     intel_region_release(&image->region);
 488     free(image);
 489 }
 490
 491 static __DRIimage *
 492 intel_create_image(__DRIscreen *screen,
 493                    int width, int height, int format,
 494                    unsigned int use,
 495                    void *loaderPrivate)
 496 {
 497    __DRIimage *image;
 498    struct intel_screen *intelScreen = screen->driverPrivate;
 499    uint32_t tiling;
 500    int cpp;
 501
 502    tiling = I915_TILING_X;
 503    if (use & __DRI_IMAGE_USE_CURSOR) {
 504       if (width != 64 || height != 64)
 505          return NULL;
 506       tiling = I915_TILING_NONE;
 507    }
 508
 509    image = intel_allocate_image(format, loaderPrivate);
 510    if (image == NULL)
 511       return NULL;
 512
 513    cpp = _mesa_get_format_bytes(image->format);
 514    image->region =
 515       intel_region_alloc(intelScreen, tiling, cpp, width, height, true);
 516    if (image->region == NULL) {
 517       free(image);
 518       return NULL;
 519    }
 520
 521    intel_setup_image_from_dimensions(image);
 522
 523    return image;
 524 }
 525
 526 static GLboolean
 527 intel_query_image(__DRIimage *image, int attrib, int *value)
 528 {
 529    switch (attrib) {
 530    case __DRI_IMAGE_ATTRIB_STRIDE:
 531       *value = image->region->pitch;
 532       return true;
 533    case __DRI_IMAGE_ATTRIB_HANDLE:
 534       *value = image->region->bo->handle;
 535       return true;
 536    case __DRI_IMAGE_ATTRIB_NAME:
 537       return intel_region_flink(image->region, (uint32_t *) value);
 538    case __DRI_IMAGE_ATTRIB_FORMAT:
 539       *value = image->dri_format;
 540       return true;
 541    case __DRI_IMAGE_ATTRIB_WIDTH:
 542       *value = image->region->width;
 543       return true;
 544    case __DRI_IMAGE_ATTRIB_HEIGHT:
 545       *value = image->region->height;
 546       return true;
 547    case __DRI_IMAGE_ATTRIB_COMPONENTS:
 548       if (image->planar_format == NULL)
 549          return false;
 550       *value = image->planar_format->components;
 551       return true;
 552    case __DRI_IMAGE_ATTRIB_FD:
 553       if (drm_intel_bo_gem_export_to_prime(image->region->bo, value) == 0)
 554          return true;
 555       return false;
 556   default:
 557       return false;
 558    }
 559 }
 560
 561 static __DRIimage *
 562 intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
 563 {
 564    __DRIimage *image;
 565
 566    image = calloc(1, sizeof *image);
 567    if (image == NULL)
 568       return NULL;
 569
 570    intel_region_reference(&image->region, orig_image->region);
 571    if (image->region == NULL) {
 572       free(image);
 573       return NULL;
 574    }
 575
 576    image->internal_format = orig_image->internal_format;
 577    image->planar_format   = orig_image->planar_format;
 578    image->dri_format      = orig_image->dri_format;
 579    image->format          = orig_image->format;
 580    image->offset          = orig_image->offset;
 581    image->width           = orig_image->width;
 582    image->height          = orig_image->height;
 583    image->tile_x          = orig_image->tile_x;
 584    image->tile_y          = orig_image->tile_y;
 585    image->has_depthstencil = orig_image->has_depthstencil;
 586    image->data            = loaderPrivate;
 587
 588    memcpy(image->strides, orig_image->strides, sizeof(image->strides));
 589    memcpy(image->offsets, orig_image->offsets, sizeof(image->offsets));
 590
 591    return image;
 592 }
 593
 594 static GLboolean
 595 intel_validate_usage(__DRIimage *image, unsigned int use)
 596 {
 597    if (use & __DRI_IMAGE_USE_CURSOR) {
 598       if (image->region->width != 64 || image->region->height != 64)
 599          return GL_FALSE;
 600    }
 601
 602    return GL_TRUE;
 603 }
 604
 605 static __DRIimage *
 606 intel_create_image_from_names(__DRIscreen *screen,
 607                               int width, int height, int fourcc,
 608                               int *names, int num_names,
 609                               int *strides, int *offsets,
 610                               void *loaderPrivate)
 611 {
 612     struct intel_image_format *f = NULL;
 613     __DRIimage *image;
 614     int i, index;
 615
 616     if (screen == NULL || names == NULL || num_names != 1)
 617         return NULL;
 618
 619     f = intel_image_format_lookup(fourcc);
 620     if (f == NULL)
 621         return NULL;
 622
 623     image = intel_create_image_from_name(screen, width, height,
 624                                          __DRI_IMAGE_FORMAT_NONE,
 625                                          names[0], strides[0],
 626                                          loaderPrivate);
 627
 628    if (image == NULL)
 629       return NULL;
 630
 631     image->planar_format = f;
 632     for (i = 0; i < f->nplanes; i++) {
 633         index = f->planes[i].buffer_index;
 634         image->offsets[index] = offsets[index];
 635         image->strides[index] = strides[index];
 636     }
 637
 638     return image;
 639 }
 640
 641 static __DRIimage *
 642 intel_create_image_from_fds(__DRIscreen *screen,
 643                             int width, int height, int fourcc,
 644                             int *fds, int num_fds, int *strides, int *offsets,
 645                             void *loaderPrivate)
 646 {
 647    struct intel_screen *intelScreen = screen->driverPrivate;
 648    struct intel_image_format *f;
 649    __DRIimage *image;
 650    int i, index;
 651
 652    if (fds == NULL || num_fds != 1)
 653       return NULL;
 654
 655    f = intel_image_format_lookup(fourcc);
 656    if (f == NULL)
 657       return NULL;
 658
 659    if (f->nplanes == 1)
 660       image = intel_allocate_image(f->planes[0].dri_format, loaderPrivate);
 661    else
 662       image = intel_allocate_image(__DRI_IMAGE_FORMAT_NONE, loaderPrivate);
 663
 664    if (image == NULL)
 665       return NULL;
 666
 667    image->region = intel_region_alloc_for_fd(intelScreen,
 668                                              1, width, height,
 669                                              strides[0], fds[0], "image");
 670    if (image->region == NULL) {
 671       free(image);
 672       return NULL;
 673    }
 674
 675    image->planar_format = f;
 676    for (i = 0; i < f->nplanes; i++) {
 677       index = f->planes[i].buffer_index;
 678       image->offsets[index] = offsets[index];
 679       image->strides[index] = strides[index];
 680    }
 681
 682    intel_setup_image_from_dimensions(image);
 683
 684    return image;
 685 }
 686
 687 static __DRIimage *
 688 intel_create_image_from_dma_bufs(__DRIscreen *screen,
 689                                  int width, int height, int fourcc,
 690                                  int *fds, int num_fds,
 691                                  int *strides, int *offsets,
 692                                  enum __DRIYUVColorSpace yuv_color_space,
 693                                  enum __DRISampleRange sample_range,
 694                                  enum __DRIChromaSiting horizontal_siting,
 695                                  enum __DRIChromaSiting vertical_siting,
 696                                  unsigned *error,
 697                                  void *loaderPrivate)
 698 {
 699    __DRIimage *image;
 700    struct intel_image_format *f = intel_image_format_lookup(fourcc);
 701
 702    /* For now only packed formats that have native sampling are supported. */
 703    if (!f || f->nplanes != 1) {
 704       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 705       return NULL;
 706    }
 707
 708    image = intel_create_image_from_fds(screen, width, height, fourcc, fds,
 709                                        num_fds, strides, offsets,
 710                                        loaderPrivate);
 711
 712    /*
 713     * Invalid parameters and any inconsistencies between are assumed to be
 714     * checked by the caller. Therefore besides unsupported formats one can fail
 715     * only in allocation.
 716     */
 717    if (!image) {
 718       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
 719       return NULL;
 720    }
 721
 722    image->dma_buf_imported = true;
 723    image->yuv_color_space = yuv_color_space;
 724    image->sample_range = sample_range;
 725    image->horizontal_siting = horizontal_siting;
 726    image->vertical_siting = vertical_siting;
 727
 728    *error = __DRI_IMAGE_ERROR_SUCCESS;
 729    return image;
 730 }
 731
 732 static __DRIimage *
 733 intel_from_planar(__DRIimage *parent, int plane, void *loaderPrivate)
 734 {
 735     int width, height, offset, stride, dri_format, index;
 736     struct intel_image_format *f;
 737     uint32_t mask_x, mask_y;
 738     __DRIimage *image;
 739
 740     if (parent == NULL || parent->planar_format == NULL)
 741         return NULL;
 742
 743     f = parent->planar_format;
 744
 745     if (plane >= f->nplanes)
 746         return NULL;
 747
 748     width = parent->region->width >> f->planes[plane].width_shift;
 749     height = parent->region->height >> f->planes[plane].height_shift;
 750     dri_format = f->planes[plane].dri_format;
 751     index = f->planes[plane].buffer_index;
 752     offset = parent->offsets[index];
 753     stride = parent->strides[index];
 754
 755     image = intel_allocate_image(dri_format, loaderPrivate);
 756     if (image == NULL)
 757        return NULL;
 758
 759     if (offset + height * stride > parent->region->bo->size) {
 760        _mesa_warning(NULL, "intel_create_sub_image: subimage out of bounds");
 761        free(image);
 762        return NULL;
 763     }
 764
 765     image->region = calloc(sizeof(*image->region), 1);
 766     if (image->region == NULL) {
 767        free(image);
 768        return NULL;
 769     }
 770
 771     image->region->cpp = _mesa_get_format_bytes(image->format);
 772     image->region->width = width;
 773     image->region->height = height;
 774     image->region->pitch = stride;
 775     image->region->refcount = 1;
 776     image->region->bo = parent->region->bo;
 777     drm_intel_bo_reference(image->region->bo);
 778     image->region->tiling = parent->region->tiling;
 779     image->offset = offset;
 780     intel_setup_image_from_dimensions(image);
 781
 782     intel_region_get_tile_masks(image->region, &mask_x, &mask_y, false);
 783     if (offset & mask_x)
 784        _mesa_warning(NULL,
 785                      "intel_create_sub_image: offset not on tile boundary");
 786
 787     return image;
 788 }
 789
 790 static struct __DRIimageExtensionRec intelImageExtension = {
 791     .base = { __DRI_IMAGE, 8 },
 792
 793     .createImageFromName                = intel_create_image_from_name,
 794     .createImageFromRenderbuffer        = intel_create_image_from_renderbuffer,
 795     .destroyImage                       = intel_destroy_image,
 796     .createImage                        = intel_create_image,
 797     .queryImage                         = intel_query_image,
 798     .dupImage                           = intel_dup_image,
 799     .validateUsage                      = intel_validate_usage,
 800     .createImageFromNames               = intel_create_image_from_names,
 801     .fromPlanar                         = intel_from_planar,
 802     .createImageFromTexture             = intel_create_image_from_texture,
 803     .createImageFromFds                 = intel_create_image_from_fds,
 804     .createImageFromDmaBufs             = intel_create_image_from_dma_bufs
 805 };
 806
 807 static const __DRIextension *intelScreenExtensions[] = {
 808     &intelTexBufferExtension.base,
 809     &intelFlushExtension.base,
 810     &intelImageExtension.base,
 811     &dri2ConfigQueryExtension.base,
 812     NULL
 813 };
 814
 815 static bool
 816 intel_get_param(__DRIscreen *psp, int param, int *value)
 817 {
 818    int ret;
 819    struct drm_i915_getparam gp;
 820
 821    memset(&gp, 0, sizeof(gp));
 822    gp.param = param;
 823    gp.value = value;
 824
 825    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 826    if (ret) {
 827       if (ret != -EINVAL)
 828          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 829       return false;
 830    }
 831
 832    return true;
 833 }
 834
 835 static bool
 836 intel_get_boolean(__DRIscreen *psp, int param)
 837 {
 838    int value = 0;
 839    return intel_get_param(psp, param, &value) && value;
 840 }
 841
 842 static void
 843 intelDestroyScreen(__DRIscreen * sPriv)
 844 {
 845    struct intel_screen *intelScreen = sPriv->driverPrivate;
 846
 847    dri_bufmgr_destroy(intelScreen->bufmgr);
 848    driDestroyOptionInfo(&intelScreen->optionCache);
 849
 850    free(intelScreen);
 851    sPriv->driverPrivate = NULL;
 852 }
 853
 854
 855 /**
 856  * This is called when we need to set up GL rendering to a new X window.
 857  */
 858 static GLboolean
 859 intelCreateBuffer(__DRIscreen * driScrnPriv,
 860                   __DRIdrawable * driDrawPriv,
 861                   const struct gl_config * mesaVis, GLboolean isPixmap)
 862 {
 863    struct intel_renderbuffer *rb;
 864    struct intel_screen *screen = (struct intel_screen*) driScrnPriv->driverPrivate;
 865    gl_format rgbFormat;
 866    unsigned num_samples = intel_quantize_num_samples(screen, mesaVis->samples);
 867    struct gl_framebuffer *fb;
 868
 869    if (isPixmap)
 870       return false;
 871
 872    fb = CALLOC_STRUCT(gl_framebuffer);
 873    if (!fb)
 874       return false;
 875
 876    _mesa_initialize_window_framebuffer(fb, mesaVis);
 877
 878    if (mesaVis->redBits == 5)
 879       rgbFormat = MESA_FORMAT_RGB565;
 880    else if (mesaVis->sRGBCapable)
 881       rgbFormat = MESA_FORMAT_SARGB8;
 882    else if (mesaVis->alphaBits == 0)
 883       rgbFormat = MESA_FORMAT_XRGB8888;
 884    else {
 885       rgbFormat = MESA_FORMAT_SARGB8;
 886       fb->Visual.sRGBCapable = true;
 887    }
 888
 889    /* setup the hardware-based renderbuffers */
 890    rb = intel_create_renderbuffer(rgbFormat, num_samples);
 891    _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base.Base);
 892
 893    if (mesaVis->doubleBufferMode) {
 894       rb = intel_create_renderbuffer(rgbFormat, num_samples);
 895       _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base.Base);
 896    }
 897
 898    /*
 899     * Assert here that the gl_config has an expected depth/stencil bit
 900     * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
 901     * which constructs the advertised configs.)
 902     */
 903    if (mesaVis->depthBits == 24) {
 904       assert(mesaVis->stencilBits == 8);
 905
 906       if (screen->hw_has_separate_stencil) {
 907          rb = intel_create_private_renderbuffer(MESA_FORMAT_X8_Z24,
 908                                                 num_samples);
 909          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 910          rb = intel_create_private_renderbuffer(MESA_FORMAT_S8,
 911                                                 num_samples);
 912          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 913       } else {
 914          /*
 915           * Use combined depth/stencil. Note that the renderbuffer is
 916           * attached to two attachment points.
 917           */
 918          rb = intel_create_private_renderbuffer(MESA_FORMAT_S8_Z24,
 919                                                 num_samples);
 920          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 921          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 922       }
 923    }
 924    else if (mesaVis->depthBits == 16) {
 925       assert(mesaVis->stencilBits == 0);
 926       rb = intel_create_private_renderbuffer(MESA_FORMAT_Z16,
 927                                              num_samples);
 928       _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 929    }
 930    else {
 931       assert(mesaVis->depthBits == 0);
 932       assert(mesaVis->stencilBits == 0);
 933    }
 934
 935    /* now add any/all software-based renderbuffers we may need */
 936    _swrast_add_soft_renderbuffers(fb,
 937                                   false, /* never sw color */
 938                                   false, /* never sw depth */
 939                                   false, /* never sw stencil */
 940                                   mesaVis->accumRedBits > 0,
 941                                   false, /* never sw alpha */
 942                                   false  /* never sw aux */ );
 943    driDrawPriv->driverPrivate = fb;
 944
 945    return true;
 946 }
 947
 948 static void
 949 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 950 {
 951     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 952
 953     _mesa_reference_framebuffer(&fb, NULL);
 954 }
 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                    unsigned *error,
 964                    void *sharedContextPrivate)
 965 {
 966    bool success = false;
 967
 968    success = brwCreateContext(api, mesaVis,
 969                               driContextPriv,
 970                               major_version, minor_version, flags,
 971                               error, sharedContextPrivate);
 972
 973    if (success)
 974       return true;
 975
 976    if (driContextPriv->driverPrivate != NULL)
 977       intelDestroyContext(driContextPriv);
 978
 979    return false;
 980 }
 981
 982 static bool
 983 intel_init_bufmgr(struct intel_screen *intelScreen)
 984 {
 985    __DRIscreen *spriv = intelScreen->driScrnPriv;
 986
 987    intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
 988
 989    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 990    if (intelScreen->bufmgr == NULL) {
 991       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 992               __func__, __LINE__);
 993       return false;
 994    }
 995
 996    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 997
 998    if (!intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA)) {
 999       fprintf(stderr, "[%s: %u] Kernel 2.6.39 required.\n", __func__, __LINE__);
1000       return false;
1001    }
1002
1003    return true;
1004 }
1005
1006 /**
1007  * Override intel_screen.hw_has_separate_stencil with environment variable
1008  * INTEL_SEPARATE_STENCIL.
1009  *
1010  * Valid values for INTEL_SEPARATE_STENCIL are "0" and "1". If an invalid
1011  * valid value is encountered, a warning is emitted and INTEL_SEPARATE_STENCIL
1012  * is ignored.
1013  */
1014 static void
1015 intel_override_separate_stencil(struct intel_screen *screen)
1016 {
1017    const char *s = getenv("INTEL_SEPARATE_STENCIL");
1018    if (!s) {
1019       return;
1020    } else if (!strncmp("0", s, 2)) {
1021       screen->hw_has_separate_stencil = false;
1022    } else if (!strncmp("1", s, 2)) {
1023       screen->hw_has_separate_stencil = true;
1024    } else {
1025       fprintf(stderr,
1026               "warning: env variable INTEL_SEPARATE_STENCIL=\"%s\" has "
1027               "invalid value and is ignored", s);
1028    }
1029 }
1030
1031 static bool
1032 intel_detect_swizzling(struct intel_screen *screen)
1033 {
1034    drm_intel_bo *buffer;
1035    unsigned long flags = 0;
1036    unsigned long aligned_pitch;
1037    uint32_t tiling = I915_TILING_X;
1038    uint32_t swizzle_mode = 0;
1039
1040    buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "swizzle test",
1041                                      64, 64, 4,
1042                                      &tiling, &aligned_pitch, flags);
1043    if (buffer == NULL)
1044       return false;
1045
1046    drm_intel_bo_get_tiling(buffer, &tiling, &swizzle_mode);
1047    drm_intel_bo_unreference(buffer);
1048
1049    if (swizzle_mode == I915_BIT_6_SWIZZLE_NONE)
1050       return false;
1051    else
1052       return true;
1053 }
1054
1055 static __DRIconfig**
1056 intel_screen_make_configs(__DRIscreen *dri_screen)
1057 {
1058    static const gl_format formats[] = {
1059       MESA_FORMAT_RGB565,
1060       MESA_FORMAT_ARGB8888
1061    };
1062
1063    /* GLX_SWAP_COPY_OML is not supported due to page flipping. */
1064    static const GLenum back_buffer_modes[] = {
1065        GLX_SWAP_UNDEFINED_OML, GLX_NONE,
1066    };
1067
1068    static const uint8_t singlesample_samples[1] = {0};
1069    static const uint8_t multisample_samples[2]  = {4, 8};
1070
1071    struct intel_screen *screen = dri_screen->driverPrivate;
1072    uint8_t depth_bits[4], stencil_bits[4];
1073    __DRIconfig **configs = NULL;
1074
1075    /* Generate singlesample configs without accumulation buffer. */
1076    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1077       __DRIconfig **new_configs;
1078       int num_depth_stencil_bits = 2;
1079
1080       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
1081        * buffer that has a different number of bits per pixel than the color
1082        * buffer, gen >= 6 supports this.
1083        */
1084       depth_bits[0] = 0;
1085       stencil_bits[0] = 0;
1086
1087       if (formats[i] == MESA_FORMAT_RGB565) {
1088          depth_bits[1] = 16;
1089          stencil_bits[1] = 0;
1090          if (screen->gen >= 6) {
1091              depth_bits[2] = 24;
1092              stencil_bits[2] = 8;
1093              num_depth_stencil_bits = 3;
1094          }
1095       } else {
1096          depth_bits[1] = 24;
1097          stencil_bits[1] = 8;
1098       }
1099
1100       new_configs = driCreateConfigs(formats[i],
1101                                      depth_bits,
1102                                      stencil_bits,
1103                                      num_depth_stencil_bits,
1104                                      back_buffer_modes, 2,
1105                                      singlesample_samples, 1,
1106                                      false);
1107       configs = driConcatConfigs(configs, new_configs);
1108    }
1109
1110    /* Generate the minimum possible set of configs that include an
1111     * accumulation buffer.
1112     */
1113    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1114       __DRIconfig **new_configs;
1115
1116       if (formats[i] == MESA_FORMAT_RGB565) {
1117          depth_bits[0] = 16;
1118          stencil_bits[0] = 0;
1119       } else {
1120          depth_bits[0] = 24;
1121          stencil_bits[0] = 8;
1122       }
1123
1124       new_configs = driCreateConfigs(formats[i],
1125                                      depth_bits, stencil_bits, 1,
1126                                      back_buffer_modes, 1,
1127                                      singlesample_samples, 1,
1128                                      true);
1129       configs = driConcatConfigs(configs, new_configs);
1130    }
1131
1132    /* Generate multisample configs.
1133     *
1134     * This loop breaks early, and hence is a no-op, on gen < 6.
1135     *
1136     * Multisample configs must follow the singlesample configs in order to
1137     * work around an X server bug present in 1.12. The X server chooses to
1138     * associate the first listed RGBA888-Z24S8 config, regardless of its
1139     * sample count, with the 32-bit depth visual used for compositing.
1140     *
1141     * Only doublebuffer configs with GLX_SWAP_UNDEFINED_OML behavior are
1142     * supported.  Singlebuffer configs are not supported because no one wants
1143     * them.
1144     */
1145    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1146       if (screen->gen < 6)
1147          break;
1148
1149       __DRIconfig **new_configs;
1150       const int num_depth_stencil_bits = 2;
1151       int num_msaa_modes = 0;
1152
1153       depth_bits[0] = 0;
1154       stencil_bits[0] = 0;
1155
1156       if (formats[i] == MESA_FORMAT_RGB565) {
1157          depth_bits[1] = 16;
1158          stencil_bits[1] = 0;
1159       } else {
1160          depth_bits[1] = 24;
1161          stencil_bits[1] = 8;
1162       }
1163
1164       if (screen->gen >= 7)
1165          num_msaa_modes = 2;
1166       else if (screen->gen == 6)
1167          num_msaa_modes = 1;
1168
1169       new_configs = driCreateConfigs(formats[i],
1170                                      depth_bits,
1171                                      stencil_bits,
1172                                      num_depth_stencil_bits,
1173                                      back_buffer_modes, 1,
1174                                      multisample_samples,
1175                                      num_msaa_modes,
1176                                      false);
1177       configs = driConcatConfigs(configs, new_configs);
1178    }
1179
1180    if (configs == NULL) {
1181       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
1182               __LINE__);
1183       return NULL;
1184    }
1185
1186    return configs;
1187 }
1188
1189 static void
1190 set_max_gl_versions(struct intel_screen *screen)
1191 {
1192    int gl_version_override = _mesa_get_gl_version_override();
1193
1194    switch (screen->gen) {
1195    case 7:
1196       screen->max_gl_core_version = 31;
1197       screen->max_gl_compat_version = 30;
1198       screen->max_gl_es1_version = 11;
1199       screen->max_gl_es2_version = 30;
1200       break;
1201    case 6:
1202       screen->max_gl_core_version = 31;
1203       screen->max_gl_compat_version = 30;
1204       screen->max_gl_es1_version = 11;
1205       screen->max_gl_es2_version = 30;
1206       break;
1207    case 5:
1208    case 4:
1209       screen->max_gl_core_version = 0;
1210       screen->max_gl_compat_version = 21;
1211       screen->max_gl_es1_version = 11;
1212       screen->max_gl_es2_version = 20;
1213       break;
1214    default:
1215       assert(!"unrecognized intel_screen::gen");
1216       break;
1217    }
1218
1219    if (gl_version_override >= 31) {
1220       screen->max_gl_core_version = MAX2(screen->max_gl_core_version,
1221                                          gl_version_override);
1222    } else {
1223       screen->max_gl_compat_version = MAX2(screen->max_gl_compat_version,
1224                                            gl_version_override);
1225    }
1226
1227 #ifndef FEATURE_ES1
1228    screen->max_gl_es1_version = 0;
1229 #endif
1230
1231 #ifndef FEATURE_ES2
1232    screen->max_gl_es2_version = 0;
1233 #endif
1234 }
1235
1236 /**
1237  * This is the driver specific part of the createNewScreen entry point.
1238  * Called when using DRI2.
1239  *
1240  * \return the struct gl_config supported by this driver
1241  */
1242 static const
1243 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
1244 {
1245    struct intel_screen *intelScreen;
1246
1247    if (psp->dri2.loader->base.version <= 2 ||
1248        psp->dri2.loader->getBuffersWithFormat == NULL) {
1249       fprintf(stderr,
1250               "\nERROR!  DRI2 loader with getBuffersWithFormat() "
1251               "support required\n");
1252       return false;
1253    }
1254
1255    /* Allocate the private area */
1256    intelScreen = calloc(1, sizeof *intelScreen);
1257    if (!intelScreen) {
1258       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
1259       return false;
1260    }
1261    /* parse information in __driConfigOptions */
1262    driParseOptionInfo(&intelScreen->optionCache,
1263                       __driConfigOptions, __driNConfigOptions);
1264
1265    intelScreen->driScrnPriv = psp;
1266    psp->driverPrivate = (void *) intelScreen;
1267
1268    if (!intel_init_bufmgr(intelScreen))
1269        return false;
1270
1271    intelScreen->deviceID = drm_intel_bufmgr_gem_get_devid(intelScreen->bufmgr);
1272
1273    if (IS_GEN7(intelScreen->deviceID)) {
1274       intelScreen->gen = 7;
1275    } else if (IS_GEN6(intelScreen->deviceID)) {
1276       intelScreen->gen = 6;
1277    } else if (IS_GEN5(intelScreen->deviceID)) {
1278       intelScreen->gen = 5;
1279    } else {
1280       intelScreen->gen = 4;
1281    }
1282
1283    intelScreen->hw_has_separate_stencil = intelScreen->gen >= 6;
1284    intelScreen->hw_must_use_separate_stencil = intelScreen->gen >= 7;
1285
1286    int has_llc = 0;
1287    bool success = intel_get_param(intelScreen->driScrnPriv, I915_PARAM_HAS_LLC,
1288                                   &has_llc);
1289    if (success && has_llc)
1290       intelScreen->hw_has_llc = true;
1291    else if (!success && intelScreen->gen >= 6)
1292       intelScreen->hw_has_llc = true;
1293
1294    intel_override_separate_stencil(intelScreen);
1295
1296    intelScreen->hw_has_swizzling = intel_detect_swizzling(intelScreen);
1297
1298    set_max_gl_versions(intelScreen);
1299
1300    psp->api_mask = (1 << __DRI_API_OPENGL);
1301    if (intelScreen->max_gl_core_version > 0)
1302       psp->api_mask |= (1 << __DRI_API_OPENGL_CORE);
1303    if (intelScreen->max_gl_es1_version > 0)
1304       psp->api_mask |= (1 << __DRI_API_GLES);
1305    if (intelScreen->max_gl_es2_version > 0)
1306       psp->api_mask |= (1 << __DRI_API_GLES2);
1307    if (intelScreen->max_gl_es2_version >= 30)
1308       psp->api_mask |= (1 << __DRI_API_GLES3);
1309
1310    psp->extensions = intelScreenExtensions;
1311
1312    return (const __DRIconfig**) intel_screen_make_configs(psp);
1313 }
1314
1315 struct intel_buffer {
1316    __DRIbuffer base;
1317    struct intel_region *region;
1318 };
1319
1320 static __DRIbuffer *
1321 intelAllocateBuffer(__DRIscreen *screen,
1322                     unsigned attachment, unsigned format,
1323                     int width, int height)
1324 {
1325    struct intel_buffer *intelBuffer;
1326    struct intel_screen *intelScreen = screen->driverPrivate;
1327
1328    assert(attachment == __DRI_BUFFER_FRONT_LEFT ||
1329           attachment == __DRI_BUFFER_BACK_LEFT);
1330
1331    intelBuffer = calloc(1, sizeof *intelBuffer);
1332    if (intelBuffer == NULL)
1333       return NULL;
1334
1335    /* The front and back buffers are color buffers, which are X tiled. */
1336    intelBuffer->region = intel_region_alloc(intelScreen,
1337                                             I915_TILING_X,
1338                                             format / 8,
1339                                             width,
1340                                             height,
1341                                             true);
1342
1343    if (intelBuffer->region == NULL) {
1344            free(intelBuffer);
1345            return NULL;
1346    }
1347
1348    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
1349
1350    intelBuffer->base.attachment = attachment;
1351    intelBuffer->base.cpp = intelBuffer->region->cpp;
1352    intelBuffer->base.pitch = intelBuffer->region->pitch;
1353
1354    return &intelBuffer->base;
1355 }
1356
1357 static void
1358 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
1359 {
1360    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
1361
1362    intel_region_release(&intelBuffer->region);
1363    free(intelBuffer);
1364 }
1365
1366
1367 const struct __DriverAPIRec driDriverAPI = {
1368    .InitScreen           = intelInitScreen2,
1369    .DestroyScreen        = intelDestroyScreen,
1370    .CreateContext        = intelCreateContext,
1371    .DestroyContext       = intelDestroyContext,
1372    .CreateBuffer         = intelCreateBuffer,
1373    .DestroyBuffer        = intelDestroyBuffer,
1374    .MakeCurrent          = intelMakeCurrent,
1375    .UnbindContext        = intelUnbindContext,
1376    .AllocateBuffer       = intelAllocateBuffer,
1377    .ReleaseBuffer        = intelReleaseBuffer
1378 };
1379
1380 /* This is the table of extensions that the loader will dlsym() for. */
1381 PUBLIC const __DRIextension *__driDriverExtensions[] = {
1382     &driCoreExtension.base,
1383     &driDRI2Extension.base,
1384     NULL
1385 };