src/mesa/drivers/dri/intel/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/mfeatures.h"
  38 #include "main/version.h"
  39 #include "swrast/s_renderbuffer.h"
  40
  41 #include "utils.h"
  42 #include "xmlpool.h"
  43
  44 PUBLIC const char __driConfigOptions[] =
  45    DRI_CONF_BEGIN
  46    DRI_CONF_SECTION_PERFORMANCE
  47       DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
  48       /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
  49        * DRI_CONF_BO_REUSE_ALL
  50        */
  51       DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
  52          DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
  53             DRI_CONF_ENUM(0, "Disable buffer object reuse")
  54             DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
  55          DRI_CONF_DESC_END
  56       DRI_CONF_OPT_END
  57
  58       DRI_CONF_OPT_BEGIN(texture_tiling, bool, true)
  59          DRI_CONF_DESC(en, "Enable texture tiling")
  60       DRI_CONF_OPT_END
  61
  62       DRI_CONF_OPT_BEGIN(hiz, bool, true)
  63          DRI_CONF_DESC(en, "Enable Hierarchical Z on gen6+")
  64       DRI_CONF_OPT_END
  65
  66       DRI_CONF_OPT_BEGIN(early_z, bool, false)
  67          DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
  68       DRI_CONF_OPT_END
  69
  70       DRI_CONF_OPT_BEGIN(fragment_shader, bool, true)
  71          DRI_CONF_DESC(en, "Enable limited ARB_fragment_shader support on 915/945.")
  72       DRI_CONF_OPT_END
  73
  74    DRI_CONF_SECTION_END
  75    DRI_CONF_SECTION_QUALITY
  76       DRI_CONF_FORCE_S3TC_ENABLE(false)
  77       DRI_CONF_ALLOW_LARGE_TEXTURES(2)
  78    DRI_CONF_SECTION_END
  79    DRI_CONF_SECTION_DEBUG
  80      DRI_CONF_NO_RAST(false)
  81      DRI_CONF_ALWAYS_FLUSH_BATCH(false)
  82      DRI_CONF_ALWAYS_FLUSH_CACHE(false)
  83      DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN(false)
  84      DRI_CONF_DISABLE_GLSL_LINE_CONTINUATIONS(false)
  85      DRI_CONF_DISABLE_BLEND_FUNC_EXTENDED(false)
  86
  87       DRI_CONF_OPT_BEGIN(stub_occlusion_query, bool, false)
  88          DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
  89       DRI_CONF_OPT_END
  90
  91       DRI_CONF_OPT_BEGIN(shader_precompile, bool, true)
  92          DRI_CONF_DESC(en, "Perform code generation at shader link time.")
  93       DRI_CONF_OPT_END
  94    DRI_CONF_SECTION_END
  95 DRI_CONF_END;
  96
  97 const GLuint __driNConfigOptions = 16;
  98
  99 #include "intel_batchbuffer.h"
 100 #include "intel_buffers.h"
 101 #include "intel_bufmgr.h"
 102 #include "intel_chipset.h"
 103 #include "intel_fbo.h"
 104 #include "intel_mipmap_tree.h"
 105 #include "intel_screen.h"
 106 #include "intel_tex.h"
 107 #include "intel_regions.h"
 108
 109 #ifndef I915
 110 #include "brw_context.h"
 111 #endif
 112
 113 #include "i915_drm.h"
 114
 115 #ifdef USE_NEW_INTERFACE
 116 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
 117 #endif /*USE_NEW_INTERFACE */
 118
 119 /**
 120  * For debugging purposes, this returns a time in seconds.
 121  */
 122 double
 123 get_time(void)
 124 {
 125    struct timespec tp;
 126
 127    clock_gettime(CLOCK_MONOTONIC, &tp);
 128
 129    return tp.tv_sec + tp.tv_nsec / 1000000000.0;
 130 }
 131
 132 void
 133 aub_dump_bmp(struct gl_context *ctx)
 134 {
 135    struct gl_framebuffer *fb = ctx->DrawBuffer;
 136
 137    for (int i = 0; i < fb->_NumColorDrawBuffers; i++) {
 138       struct intel_renderbuffer *irb =
 139          intel_renderbuffer(fb->_ColorDrawBuffers[i]);
 140
 141       if (irb && irb->mt) {
 142          enum aub_dump_bmp_format format;
 143
 144          switch (irb->Base.Base.Format) {
 145          case MESA_FORMAT_ARGB8888:
 146          case MESA_FORMAT_XRGB8888:
 147             format = AUB_DUMP_BMP_FORMAT_ARGB_8888;
 148             break;
 149          default:
 150             continue;
 151          }
 152
 153          assert(irb->mt->region->pitch % irb->mt->region->cpp == 0);
 154          drm_intel_gem_bo_aub_dump_bmp(irb->mt->region->bo,
 155                                        irb->draw_x,
 156                                        irb->draw_y,
 157                                        irb->Base.Base.Width,
 158                                        irb->Base.Base.Height,
 159                                        format,
 160                                        irb->mt->region->pitch,
 161                                        0);
 162       }
 163    }
 164 }
 165
 166 static const __DRItexBufferExtension intelTexBufferExtension = {
 167    .base = { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 168
 169    .setTexBuffer        = intelSetTexBuffer,
 170    .setTexBuffer2       = intelSetTexBuffer2,
 171    .releaseTexBuffer    = NULL,
 172 };
 173
 174 static void
 175 intelDRI2Flush(__DRIdrawable *drawable)
 176 {
 177    GET_CURRENT_CONTEXT(ctx);
 178    struct intel_context *intel = intel_context(ctx);
 179    if (intel == NULL)
 180       return;
 181
 182    if (intel->gen < 4)
 183       INTEL_FIREVERTICES(intel);
 184
 185    intel_downsample_for_dri2_flush(intel, drawable);
 186    intel->need_throttle = true;
 187
 188    if (intel->batch.used)
 189       intel_batchbuffer_flush(intel);
 190
 191    if (INTEL_DEBUG & DEBUG_AUB) {
 192       aub_dump_bmp(ctx);
 193    }
 194 }
 195
 196 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 197     .base = { __DRI2_FLUSH, 3 },
 198
 199     .flush              = intelDRI2Flush,
 200     .invalidate         = dri2InvalidateDrawable,
 201 };
 202
 203 static struct intel_image_format intel_image_formats[] = {
 204    { __DRI_IMAGE_FOURCC_ARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
 205      { { 0, 0, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } },
 206
 207    { __DRI_IMAGE_FOURCC_XRGB8888, __DRI_IMAGE_COMPONENTS_RGB, 1,
 208      { { 0, 0, 0, __DRI_IMAGE_FORMAT_XRGB8888, 4 }, } },
 209
 210    { __DRI_IMAGE_FOURCC_YUV410, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 211      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 212        { 1, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 },
 213        { 2, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 } } },
 214
 215    { __DRI_IMAGE_FOURCC_YUV411, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 216      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 217        { 1, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 218        { 2, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 219
 220    { __DRI_IMAGE_FOURCC_YUV420, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 221      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 222        { 1, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 },
 223        { 2, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 } } },
 224
 225    { __DRI_IMAGE_FOURCC_YUV422, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 226      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 227        { 1, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 228        { 2, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 229
 230    { __DRI_IMAGE_FOURCC_YUV444, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 231      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 232        { 1, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 233        { 2, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 234
 235    { __DRI_IMAGE_FOURCC_NV12, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 236      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 237        { 1, 1, 1, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 238
 239    { __DRI_IMAGE_FOURCC_NV16, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 240      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 241        { 1, 1, 0, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 242
 243    /* For YUYV buffers, we set up two overlapping DRI images and treat
 244     * them as planar buffers in the compositors.  Plane 0 is GR88 and
 245     * samples YU or YV pairs and places Y into the R component, while
 246     * plane 1 is ARGB and samples YUYV clusters and places pairs and
 247     * places U into the G component and V into A.  This lets the
 248     * texture sampler interpolate the Y components correctly when
 249     * sampling from plane 0, and interpolate U and V correctly when
 250     * sampling from plane 1. */
 251    { __DRI_IMAGE_FOURCC_YUYV, __DRI_IMAGE_COMPONENTS_Y_XUXV, 2,
 252      { { 0, 0, 0, __DRI_IMAGE_FORMAT_GR88, 2 },
 253        { 0, 1, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } }
 254 };
 255
 256 static __DRIimage *
 257 intel_allocate_image(int dri_format, void *loaderPrivate)
 258 {
 259     __DRIimage *image;
 260
 261     image = calloc(1, sizeof *image);
 262     if (image == NULL)
 263         return NULL;
 264
 265     image->dri_format = dri_format;
 266     image->offset = 0;
 267
 268     switch (dri_format) {
 269     case __DRI_IMAGE_FORMAT_RGB565:
 270        image->format = MESA_FORMAT_RGB565;
 271        break;
 272     case __DRI_IMAGE_FORMAT_XRGB8888:
 273        image->format = MESA_FORMAT_XRGB8888;
 274        break;
 275     case __DRI_IMAGE_FORMAT_ARGB8888:
 276        image->format = MESA_FORMAT_ARGB8888;
 277        break;
 278     case __DRI_IMAGE_FORMAT_ABGR8888:
 279        image->format = MESA_FORMAT_RGBA8888_REV;
 280        break;
 281     case __DRI_IMAGE_FORMAT_XBGR8888:
 282        image->format = MESA_FORMAT_RGBX8888_REV;
 283        break;
 284     case __DRI_IMAGE_FORMAT_R8:
 285        image->format = MESA_FORMAT_R8;
 286        break;
 287     case __DRI_IMAGE_FORMAT_GR88:
 288        image->format = MESA_FORMAT_GR88;
 289        break;
 290     case __DRI_IMAGE_FORMAT_NONE:
 291        image->format = MESA_FORMAT_NONE;
 292        break;
 293     default:
 294        free(image);
 295        return NULL;
 296     }
 297
 298     image->internal_format = _mesa_get_format_base_format(image->format);
 299     image->data = loaderPrivate;
 300
 301     return image;
 302 }
 303
 304 /**
 305  * Sets up a DRIImage structure to point to our shared image in a region
 306  */
 307 static void
 308 intel_setup_image_from_mipmap_tree(struct intel_context *intel, __DRIimage *image,
 309                                    struct intel_mipmap_tree *mt, GLuint level,
 310                                    GLuint zoffset)
 311 {
 312    unsigned int draw_x, draw_y;
 313    uint32_t mask_x, mask_y;
 314
 315    intel_miptree_check_level_layer(mt, level, zoffset);
 316
 317    intel_region_get_tile_masks(mt->region, &mask_x, &mask_y, false);
 318    intel_miptree_get_image_offset(mt, level, zoffset, &draw_x, &draw_y);
 319
 320    image->width = mt->level[level].width;
 321    image->height = mt->level[level].height;
 322    image->tile_x = draw_x & mask_x;
 323    image->tile_y = draw_y & mask_y;
 324
 325    image->offset = intel_region_get_aligned_offset(mt->region,
 326                                                    draw_x & ~mask_x,
 327                                                    draw_y & ~mask_y,
 328                                                    false);
 329
 330    intel_region_reference(&image->region, mt->region);
 331 }
 332
 333 static void
 334 intel_setup_image_from_dimensions(__DRIimage *image)
 335 {
 336    image->width    = image->region->width;
 337    image->height   = image->region->height;
 338    image->tile_x = 0;
 339    image->tile_y = 0;
 340    image->has_depthstencil = false;
 341 }
 342
 343 static inline uint32_t
 344 intel_dri_format(GLuint format)
 345 {
 346    switch (format) {
 347    case MESA_FORMAT_RGB565:
 348       return __DRI_IMAGE_FORMAT_RGB565;
 349    case MESA_FORMAT_XRGB8888:
 350       return __DRI_IMAGE_FORMAT_XRGB8888;
 351    case MESA_FORMAT_ARGB8888:
 352       return __DRI_IMAGE_FORMAT_ARGB8888;
 353    case MESA_FORMAT_RGBA8888_REV:
 354       return __DRI_IMAGE_FORMAT_ABGR8888;
 355    case MESA_FORMAT_R8:
 356       return __DRI_IMAGE_FORMAT_R8;
 357    case MESA_FORMAT_RG88:
 358       return __DRI_IMAGE_FORMAT_GR88;
 359    }
 360
 361    return MESA_FORMAT_NONE;
 362 }
 363
 364 static __DRIimage *
 365 intel_create_image_from_name(__DRIscreen *screen,
 366                              int width, int height, int format,
 367                              int name, int pitch, void *loaderPrivate)
 368 {
 369     struct intel_screen *intelScreen = screen->driverPrivate;
 370     __DRIimage *image;
 371     int cpp;
 372
 373     image = intel_allocate_image(format, loaderPrivate);
 374     if (image->format == MESA_FORMAT_NONE)
 375        cpp = 1;
 376     else
 377        cpp = _mesa_get_format_bytes(image->format);
 378     image->region = intel_region_alloc_for_handle(intelScreen,
 379                                                   cpp, width, height,
 380                                                   pitch * cpp, name, "image");
 381     if (image->region == NULL) {
 382        free(image);
 383        return NULL;
 384     }
 385
 386     intel_setup_image_from_dimensions(image);
 387
 388     return image;
 389 }
 390
 391 static __DRIimage *
 392 intel_create_image_from_renderbuffer(__DRIcontext *context,
 393                                      int renderbuffer, void *loaderPrivate)
 394 {
 395    __DRIimage *image;
 396    struct intel_context *intel = context->driverPrivate;
 397    struct gl_renderbuffer *rb;
 398    struct intel_renderbuffer *irb;
 399
 400    rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
 401    if (!rb) {
 402       _mesa_error(&intel->ctx,
 403                   GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 404       return NULL;
 405    }
 406
 407    irb = intel_renderbuffer(rb);
 408    image = calloc(1, sizeof *image);
 409    if (image == NULL)
 410       return NULL;
 411
 412    image->internal_format = rb->InternalFormat;
 413    image->format = rb->Format;
 414    image->offset = 0;
 415    image->data = loaderPrivate;
 416    intel_region_reference(&image->region, irb->mt->region);
 417    intel_setup_image_from_dimensions(image);
 418    image->dri_format = intel_dri_format(image->format);
 419    image->has_depthstencil = irb->mt->stencil_mt? true : false;
 420
 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 intel_context *intel = context->driverPrivate;
 433    struct gl_texture_object *obj;
 434    struct intel_texture_object *iobj;
 435    GLuint face = 0;
 436
 437    obj = _mesa_lookup_texture(&intel->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(&intel->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(intel, 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    cpp = _mesa_get_format_bytes(image->format);
 511    image->region =
 512       intel_region_alloc(intelScreen, tiling, cpp, width, height, true);
 513    if (image->region == NULL) {
 514       free(image);
 515       return NULL;
 516    }
 517
 518    intel_setup_image_from_dimensions(image);
 519
 520    return image;
 521 }
 522
 523 static GLboolean
 524 intel_query_image(__DRIimage *image, int attrib, int *value)
 525 {
 526    switch (attrib) {
 527    case __DRI_IMAGE_ATTRIB_STRIDE:
 528       *value = image->region->pitch;
 529       return true;
 530    case __DRI_IMAGE_ATTRIB_HANDLE:
 531       *value = image->region->bo->handle;
 532       return true;
 533    case __DRI_IMAGE_ATTRIB_NAME:
 534       return intel_region_flink(image->region, (uint32_t *) value);
 535    case __DRI_IMAGE_ATTRIB_FORMAT:
 536       *value = image->dri_format;
 537       return true;
 538    case __DRI_IMAGE_ATTRIB_WIDTH:
 539       *value = image->region->width;
 540       return true;
 541    case __DRI_IMAGE_ATTRIB_HEIGHT:
 542       *value = image->region->height;
 543       return true;
 544    case __DRI_IMAGE_ATTRIB_COMPONENTS:
 545       if (image->planar_format == NULL)
 546          return false;
 547       *value = image->planar_format->components;
 548       return true;
 549   default:
 550       return false;
 551    }
 552 }
 553
 554 static __DRIimage *
 555 intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
 556 {
 557    __DRIimage *image;
 558
 559    image = calloc(1, sizeof *image);
 560    if (image == NULL)
 561       return NULL;
 562
 563    intel_region_reference(&image->region, orig_image->region);
 564    if (image->region == NULL) {
 565       free(image);
 566       return NULL;
 567    }
 568
 569    image->internal_format = orig_image->internal_format;
 570    image->planar_format   = orig_image->planar_format;
 571    image->dri_format      = orig_image->dri_format;
 572    image->format          = orig_image->format;
 573    image->offset          = orig_image->offset;
 574    image->width           = orig_image->width;
 575    image->height          = orig_image->height;
 576    image->tile_x          = orig_image->tile_x;
 577    image->tile_y          = orig_image->tile_y;
 578    image->has_depthstencil = orig_image->has_depthstencil;
 579    image->data            = loaderPrivate;
 580
 581    memcpy(image->strides, orig_image->strides, sizeof(image->strides));
 582    memcpy(image->offsets, orig_image->offsets, sizeof(image->offsets));
 583
 584    return image;
 585 }
 586
 587 static GLboolean
 588 intel_validate_usage(__DRIimage *image, unsigned int use)
 589 {
 590    if (use & __DRI_IMAGE_USE_CURSOR) {
 591       if (image->region->width != 64 || image->region->height != 64)
 592          return GL_FALSE;
 593    }
 594
 595    return GL_TRUE;
 596 }
 597
 598 static __DRIimage *
 599 intel_create_image_from_names(__DRIscreen *screen,
 600                               int width, int height, int fourcc,
 601                               int *names, int num_names,
 602                               int *strides, int *offsets,
 603                               void *loaderPrivate)
 604 {
 605     struct intel_image_format *f = NULL;
 606     __DRIimage *image;
 607     int i, index;
 608
 609     if (screen == NULL || names == NULL || num_names != 1)
 610         return NULL;
 611
 612     for (i = 0; i < ARRAY_SIZE(intel_image_formats); i++) {
 613         if (intel_image_formats[i].fourcc == fourcc) {
 614            f = &intel_image_formats[i];
 615         }
 616     }
 617
 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_from_planar(__DRIimage *parent, int plane, void *loaderPrivate)
 641 {
 642     int width, height, offset, stride, dri_format, index;
 643     struct intel_image_format *f;
 644     uint32_t mask_x, mask_y;
 645     __DRIimage *image;
 646
 647     if (parent == NULL || parent->planar_format == NULL)
 648         return NULL;
 649
 650     f = parent->planar_format;
 651
 652     if (plane >= f->nplanes)
 653         return NULL;
 654
 655     width = parent->region->width >> f->planes[plane].width_shift;
 656     height = parent->region->height >> f->planes[plane].height_shift;
 657     dri_format = f->planes[plane].dri_format;
 658     index = f->planes[plane].buffer_index;
 659     offset = parent->offsets[index];
 660     stride = parent->strides[index];
 661
 662     image = intel_allocate_image(dri_format, loaderPrivate);
 663     if (offset + height * stride > parent->region->bo->size) {
 664        _mesa_warning(NULL, "intel_create_sub_image: subimage out of bounds");
 665        free(image);
 666        return NULL;
 667     }
 668
 669     image->region = calloc(sizeof(*image->region), 1);
 670     if (image->region == NULL) {
 671        free(image);
 672        return NULL;
 673     }
 674
 675     image->region->cpp = _mesa_get_format_bytes(image->format);
 676     image->region->width = width;
 677     image->region->height = height;
 678     image->region->pitch = stride;
 679     image->region->refcount = 1;
 680     image->region->bo = parent->region->bo;
 681     drm_intel_bo_reference(image->region->bo);
 682     image->region->tiling = parent->region->tiling;
 683     image->offset = offset;
 684     intel_setup_image_from_dimensions(image);
 685
 686     intel_region_get_tile_masks(image->region, &mask_x, &mask_y, false);
 687     if (offset & mask_x)
 688        _mesa_warning(NULL,
 689                      "intel_create_sub_image: offset not on tile boundary");
 690
 691     return image;
 692 }
 693
 694 static struct __DRIimageExtensionRec intelImageExtension = {
 695     .base = { __DRI_IMAGE, 6 },
 696
 697     .createImageFromName                = intel_create_image_from_name,
 698     .createImageFromRenderbuffer        = intel_create_image_from_renderbuffer,
 699     .destroyImage                       = intel_destroy_image,
 700     .createImage                        = intel_create_image,
 701     .queryImage                         = intel_query_image,
 702     .dupImage                           = intel_dup_image,
 703     .validateUsage                      = intel_validate_usage,
 704     .createImageFromNames               = intel_create_image_from_names,
 705     .fromPlanar                         = intel_from_planar,
 706     .createImageFromTexture             = intel_create_image_from_texture
 707 };
 708
 709 static const __DRIextension *intelScreenExtensions[] = {
 710     &intelTexBufferExtension.base,
 711     &intelFlushExtension.base,
 712     &intelImageExtension.base,
 713     &dri2ConfigQueryExtension.base,
 714     NULL
 715 };
 716
 717 static bool
 718 intel_get_param(__DRIscreen *psp, int param, int *value)
 719 {
 720    int ret;
 721    struct drm_i915_getparam gp;
 722
 723    memset(&gp, 0, sizeof(gp));
 724    gp.param = param;
 725    gp.value = value;
 726
 727    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 728    if (ret) {
 729       if (ret != -EINVAL)
 730          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 731       return false;
 732    }
 733
 734    return true;
 735 }
 736
 737 static bool
 738 intel_get_boolean(__DRIscreen *psp, int param)
 739 {
 740    int value = 0;
 741    return intel_get_param(psp, param, &value) && value;
 742 }
 743
 744 static void
 745 intelDestroyScreen(__DRIscreen * sPriv)
 746 {
 747    struct intel_screen *intelScreen = sPriv->driverPrivate;
 748
 749    dri_bufmgr_destroy(intelScreen->bufmgr);
 750    driDestroyOptionInfo(&intelScreen->optionCache);
 751
 752    free(intelScreen);
 753    sPriv->driverPrivate = NULL;
 754 }
 755
 756
 757 /**
 758  * This is called when we need to set up GL rendering to a new X window.
 759  */
 760 static GLboolean
 761 intelCreateBuffer(__DRIscreen * driScrnPriv,
 762                   __DRIdrawable * driDrawPriv,
 763                   const struct gl_config * mesaVis, GLboolean isPixmap)
 764 {
 765    struct intel_renderbuffer *rb;
 766    struct intel_screen *screen = (struct intel_screen*) driScrnPriv->driverPrivate;
 767    gl_format rgbFormat;
 768    unsigned num_samples = intel_quantize_num_samples(screen, mesaVis->samples);
 769    struct gl_framebuffer *fb;
 770
 771    if (isPixmap)
 772       return false;
 773
 774    fb = CALLOC_STRUCT(gl_framebuffer);
 775    if (!fb)
 776       return false;
 777
 778    _mesa_initialize_window_framebuffer(fb, mesaVis);
 779
 780    if (mesaVis->redBits == 5)
 781       rgbFormat = MESA_FORMAT_RGB565;
 782    else if (mesaVis->sRGBCapable)
 783       rgbFormat = MESA_FORMAT_SARGB8;
 784    else if (mesaVis->alphaBits == 0)
 785       rgbFormat = MESA_FORMAT_XRGB8888;
 786    else {
 787       if (screen->gen >= 4) {
 788          rgbFormat = MESA_FORMAT_SARGB8;
 789          fb->Visual.sRGBCapable = true;
 790       } else {
 791          rgbFormat = MESA_FORMAT_ARGB8888;
 792       }
 793
 794    }
 795
 796    /* setup the hardware-based renderbuffers */
 797    rb = intel_create_renderbuffer(rgbFormat, num_samples);
 798    _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base.Base);
 799
 800    if (mesaVis->doubleBufferMode) {
 801       rb = intel_create_renderbuffer(rgbFormat, num_samples);
 802       _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base.Base);
 803    }
 804
 805    /*
 806     * Assert here that the gl_config has an expected depth/stencil bit
 807     * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
 808     * which constructs the advertised configs.)
 809     */
 810    if (mesaVis->depthBits == 24) {
 811       assert(mesaVis->stencilBits == 8);
 812
 813       if (screen->hw_has_separate_stencil) {
 814          rb = intel_create_private_renderbuffer(MESA_FORMAT_X8_Z24,
 815                                                 num_samples);
 816          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 817          rb = intel_create_private_renderbuffer(MESA_FORMAT_S8,
 818                                                 num_samples);
 819          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 820       } else {
 821          /*
 822           * Use combined depth/stencil. Note that the renderbuffer is
 823           * attached to two attachment points.
 824           */
 825          rb = intel_create_private_renderbuffer(MESA_FORMAT_S8_Z24,
 826                                                 num_samples);
 827          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 828          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 829       }
 830    }
 831    else if (mesaVis->depthBits == 16) {
 832       assert(mesaVis->stencilBits == 0);
 833       rb = intel_create_private_renderbuffer(MESA_FORMAT_Z16,
 834                                              num_samples);
 835       _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 836    }
 837    else {
 838       assert(mesaVis->depthBits == 0);
 839       assert(mesaVis->stencilBits == 0);
 840    }
 841
 842    /* now add any/all software-based renderbuffers we may need */
 843    _swrast_add_soft_renderbuffers(fb,
 844                                   false, /* never sw color */
 845                                   false, /* never sw depth */
 846                                   false, /* never sw stencil */
 847                                   mesaVis->accumRedBits > 0,
 848                                   false, /* never sw alpha */
 849                                   false  /* never sw aux */ );
 850    driDrawPriv->driverPrivate = fb;
 851
 852    return true;
 853 }
 854
 855 static void
 856 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 857 {
 858     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 859
 860     _mesa_reference_framebuffer(&fb, NULL);
 861 }
 862
 863 /* There are probably better ways to do this, such as an
 864  * init-designated function to register chipids and createcontext
 865  * functions.
 866  */
 867 extern bool
 868 i830CreateContext(int api,
 869                   const struct gl_config *mesaVis,
 870                   __DRIcontext *driContextPriv,
 871                   unsigned major_version,
 872                   unsigned minor_version,
 873                   unsigned *error,
 874                   void *sharedContextPrivate);
 875
 876 extern bool
 877 i915CreateContext(int api,
 878                   const struct gl_config *mesaVis,
 879                   __DRIcontext *driContextPriv,
 880                   unsigned major_version,
 881                   unsigned minor_version,
 882                   unsigned *error,
 883                   void *sharedContextPrivate);
 884 extern bool
 885 brwCreateContext(int api,
 886                  const struct gl_config *mesaVis,
 887                  __DRIcontext *driContextPriv,
 888                  unsigned major_version,
 889                  unsigned minor_version,
 890                  uint32_t flags,
 891                  unsigned *error,
 892                  void *sharedContextPrivate);
 893
 894 static GLboolean
 895 intelCreateContext(gl_api api,
 896                    const struct gl_config * mesaVis,
 897                    __DRIcontext * driContextPriv,
 898                    unsigned major_version,
 899                    unsigned minor_version,
 900                    uint32_t flags,
 901                    unsigned *error,
 902                    void *sharedContextPrivate)
 903 {
 904    bool success = false;
 905
 906 #ifdef I915
 907    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 908    struct intel_screen *intelScreen = sPriv->driverPrivate;
 909
 910    if (IS_9XX(intelScreen->deviceID)) {
 911       success = i915CreateContext(api, mesaVis, driContextPriv,
 912                                   major_version, minor_version, error,
 913                                   sharedContextPrivate);
 914    } else {
 915       intelScreen->no_vbo = true;
 916       success = i830CreateContext(api, mesaVis, driContextPriv,
 917                                   major_version, minor_version, error,
 918                                   sharedContextPrivate);
 919    }
 920 #else
 921    success = brwCreateContext(api, mesaVis,
 922                               driContextPriv,
 923                               major_version, minor_version, flags,
 924                               error, sharedContextPrivate);
 925 #endif
 926
 927    if (success)
 928       return true;
 929
 930    if (driContextPriv->driverPrivate != NULL)
 931       intelDestroyContext(driContextPriv);
 932
 933    return false;
 934 }
 935
 936 static bool
 937 intel_init_bufmgr(struct intel_screen *intelScreen)
 938 {
 939    __DRIscreen *spriv = intelScreen->driScrnPriv;
 940    int num_fences = 0;
 941
 942    intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
 943
 944    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 945    if (intelScreen->bufmgr == NULL) {
 946       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 947               __func__, __LINE__);
 948       return false;
 949    }
 950
 951    if (!intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences) ||
 952        num_fences == 0) {
 953       fprintf(stderr, "[%s: %u] Kernel 2.6.29 required.\n", __func__, __LINE__);
 954       return false;
 955    }
 956
 957    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 958
 959    intelScreen->relaxed_relocations = 0;
 960    intelScreen->relaxed_relocations |=
 961       intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA) << 0;
 962
 963    return true;
 964 }
 965
 966 /**
 967  * Override intel_screen.hw_has_separate_stencil with environment variable
 968  * INTEL_SEPARATE_STENCIL.
 969  *
 970  * Valid values for INTEL_SEPARATE_STENCIL are "0" and "1". If an invalid
 971  * valid value is encountered, a warning is emitted and INTEL_SEPARATE_STENCIL
 972  * is ignored.
 973  */
 974 static void
 975 intel_override_separate_stencil(struct intel_screen *screen)
 976 {
 977    const char *s = getenv("INTEL_SEPARATE_STENCIL");
 978    if (!s) {
 979       return;
 980    } else if (!strncmp("0", s, 2)) {
 981       screen->hw_has_separate_stencil = false;
 982    } else if (!strncmp("1", s, 2)) {
 983       screen->hw_has_separate_stencil = true;
 984    } else {
 985       fprintf(stderr,
 986               "warning: env variable INTEL_SEPARATE_STENCIL=\"%s\" has "
 987               "invalid value and is ignored", s);
 988    }
 989 }
 990
 991 static bool
 992 intel_detect_swizzling(struct intel_screen *screen)
 993 {
 994    drm_intel_bo *buffer;
 995    unsigned long flags = 0;
 996    unsigned long aligned_pitch;
 997    uint32_t tiling = I915_TILING_X;
 998    uint32_t swizzle_mode = 0;
 999
1000    buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "swizzle test",
1001                                      64, 64, 4,
1002                                      &tiling, &aligned_pitch, flags);
1003    if (buffer == NULL)
1004       return false;
1005
1006    drm_intel_bo_get_tiling(buffer, &tiling, &swizzle_mode);
1007    drm_intel_bo_unreference(buffer);
1008
1009    if (swizzle_mode == I915_BIT_6_SWIZZLE_NONE)
1010       return false;
1011    else
1012       return true;
1013 }
1014
1015 static __DRIconfig**
1016 intel_screen_make_configs(__DRIscreen *dri_screen)
1017 {
1018    static const gl_format formats[] = {
1019       MESA_FORMAT_RGB565,
1020       MESA_FORMAT_ARGB8888
1021    };
1022
1023    /* GLX_SWAP_COPY_OML is not supported due to page flipping. */
1024    static const GLenum back_buffer_modes[] = {
1025        GLX_SWAP_UNDEFINED_OML, GLX_NONE,
1026    };
1027
1028    static const uint8_t singlesample_samples[1] = {0};
1029    static const uint8_t multisample_samples[2]  = {4, 8};
1030
1031    struct intel_screen *screen = dri_screen->driverPrivate;
1032    uint8_t depth_bits[4], stencil_bits[4];
1033    __DRIconfig **configs = NULL;
1034
1035    /* Generate singlesample configs without accumulation buffer. */
1036    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1037       __DRIconfig **new_configs;
1038       int num_depth_stencil_bits = 2;
1039
1040       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
1041        * buffer that has a different number of bits per pixel than the color
1042        * buffer, gen >= 6 supports this.
1043        */
1044       depth_bits[0] = 0;
1045       stencil_bits[0] = 0;
1046
1047       if (formats[i] == MESA_FORMAT_RGB565) {
1048          depth_bits[1] = 16;
1049          stencil_bits[1] = 0;
1050          if (screen->gen >= 6) {
1051              depth_bits[2] = 24;
1052              stencil_bits[2] = 8;
1053              num_depth_stencil_bits = 3;
1054          }
1055       } else {
1056          depth_bits[1] = 24;
1057          stencil_bits[1] = 8;
1058       }
1059
1060       new_configs = driCreateConfigs(formats[i],
1061                                      depth_bits,
1062                                      stencil_bits,
1063                                      num_depth_stencil_bits,
1064                                      back_buffer_modes, 2,
1065                                      singlesample_samples, 1,
1066                                      false);
1067       configs = driConcatConfigs(configs, new_configs);
1068    }
1069
1070    /* Generate the minimum possible set of configs that include an
1071     * accumulation buffer.
1072     */
1073    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1074       __DRIconfig **new_configs;
1075
1076       if (formats[i] == MESA_FORMAT_RGB565) {
1077          depth_bits[0] = 16;
1078          stencil_bits[0] = 0;
1079       } else {
1080          depth_bits[0] = 24;
1081          stencil_bits[0] = 8;
1082       }
1083
1084       new_configs = driCreateConfigs(formats[i],
1085                                      depth_bits, stencil_bits, 1,
1086                                      back_buffer_modes, 1,
1087                                      singlesample_samples, 1,
1088                                      true);
1089       configs = driConcatConfigs(configs, new_configs);
1090    }
1091
1092    /* Generate multisample configs.
1093     *
1094     * This loop breaks early, and hence is a no-op, on gen < 6.
1095     *
1096     * Multisample configs must follow the singlesample configs in order to
1097     * work around an X server bug present in 1.12. The X server chooses to
1098     * associate the first listed RGBA888-Z24S8 config, regardless of its
1099     * sample count, with the 32-bit depth visual used for compositing.
1100     *
1101     * Only doublebuffer configs with GLX_SWAP_UNDEFINED_OML behavior are
1102     * supported.  Singlebuffer configs are not supported because no one wants
1103     * them.
1104     */
1105    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1106       if (screen->gen < 6)
1107          break;
1108
1109       __DRIconfig **new_configs;
1110       const int num_depth_stencil_bits = 2;
1111       int num_msaa_modes = 0;
1112
1113       depth_bits[0] = 0;
1114       stencil_bits[0] = 0;
1115
1116       if (formats[i] == MESA_FORMAT_RGB565) {
1117          depth_bits[1] = 16;
1118          stencil_bits[1] = 0;
1119       } else {
1120          depth_bits[1] = 24;
1121          stencil_bits[1] = 8;
1122       }
1123
1124       if (screen->gen >= 7)
1125          num_msaa_modes = 2;
1126       else if (screen->gen == 6)
1127          num_msaa_modes = 1;
1128
1129       new_configs = driCreateConfigs(formats[i],
1130                                      depth_bits,
1131                                      stencil_bits,
1132                                      num_depth_stencil_bits,
1133                                      back_buffer_modes, 1,
1134                                      multisample_samples,
1135                                      num_msaa_modes,
1136                                      false);
1137       configs = driConcatConfigs(configs, new_configs);
1138    }
1139
1140    if (configs == NULL) {
1141       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
1142               __LINE__);
1143       return NULL;
1144    }
1145
1146    return configs;
1147 }
1148
1149 static void
1150 set_max_gl_versions(struct intel_screen *screen)
1151 {
1152    int gl_version_override = _mesa_get_gl_version_override();
1153
1154    switch (screen->gen) {
1155    case 7:
1156       if (screen->kernel_has_gen7_sol_reset) {
1157          screen->max_gl_core_version = 31;
1158          screen->max_gl_compat_version = 30;
1159          screen->max_gl_es1_version = 11;
1160          screen->max_gl_es2_version = 30;
1161       } else {
1162          screen->max_gl_core_version = 0;
1163          screen->max_gl_compat_version = 21;
1164          screen->max_gl_es1_version = 11;
1165          screen->max_gl_es2_version = 20;
1166       }
1167       break;
1168    case 6:
1169       screen->max_gl_core_version = 31;
1170       screen->max_gl_compat_version = 30;
1171       screen->max_gl_es1_version = 11;
1172       screen->max_gl_es2_version = 30;
1173       break;
1174    case 5:
1175    case 4:
1176       screen->max_gl_core_version = 0;
1177       screen->max_gl_compat_version = 21;
1178       screen->max_gl_es1_version = 11;
1179       screen->max_gl_es2_version = 20;
1180       break;
1181    case 3: {
1182       bool has_fragment_shader = driQueryOptionb(&screen->optionCache, "fragment_shader");
1183       bool has_occlusion_query = driQueryOptionb(&screen->optionCache, "stub_occlusion_query");
1184
1185       screen->max_gl_core_version = 0;
1186       screen->max_gl_es1_version = 11;
1187
1188       if (has_fragment_shader && has_occlusion_query) {
1189          screen->max_gl_compat_version = 21;
1190       } else {
1191          screen->max_gl_compat_version = 14;
1192       }
1193
1194       if (has_fragment_shader) {
1195          screen->max_gl_es2_version = 20;
1196       } else {
1197          screen->max_gl_es2_version = 0;
1198       }
1199
1200       break;
1201    }
1202    case 2:
1203       screen->max_gl_core_version = 0;
1204       screen->max_gl_compat_version = 13;
1205       screen->max_gl_es1_version = 11;
1206       screen->max_gl_es2_version = 0;
1207       break;
1208    default:
1209       assert(!"unrecognized intel_screen::gen");
1210       break;
1211    }
1212
1213    if (gl_version_override >= 31) {
1214       screen->max_gl_core_version = MAX2(screen->max_gl_core_version,
1215                                          gl_version_override);
1216    } else {
1217       screen->max_gl_compat_version = MAX2(screen->max_gl_compat_version,
1218                                            gl_version_override);
1219    }
1220
1221 #ifndef FEATURE_ES1
1222    screen->max_gl_es1_version = 0;
1223 #endif
1224
1225 #ifndef FEATURE_ES2
1226    screen->max_gl_es2_version = 0;
1227 #endif
1228 }
1229
1230 /**
1231  * This is the driver specific part of the createNewScreen entry point.
1232  * Called when using DRI2.
1233  *
1234  * \return the struct gl_config supported by this driver
1235  */
1236 static const
1237 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
1238 {
1239    struct intel_screen *intelScreen;
1240
1241    if (psp->dri2.loader->base.version <= 2 ||
1242        psp->dri2.loader->getBuffersWithFormat == NULL) {
1243       fprintf(stderr,
1244               "\nERROR!  DRI2 loader with getBuffersWithFormat() "
1245               "support required\n");
1246       return false;
1247    }
1248
1249    /* Allocate the private area */
1250    intelScreen = calloc(1, sizeof *intelScreen);
1251    if (!intelScreen) {
1252       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
1253       return false;
1254    }
1255    /* parse information in __driConfigOptions */
1256    driParseOptionInfo(&intelScreen->optionCache,
1257                       __driConfigOptions, __driNConfigOptions);
1258
1259    intelScreen->driScrnPriv = psp;
1260    psp->driverPrivate = (void *) intelScreen;
1261
1262    if (!intel_init_bufmgr(intelScreen))
1263        return false;
1264
1265    intelScreen->deviceID = drm_intel_bufmgr_gem_get_devid(intelScreen->bufmgr);
1266
1267    intelScreen->kernel_has_gen7_sol_reset =
1268       intel_get_boolean(intelScreen->driScrnPriv,
1269                         I915_PARAM_HAS_GEN7_SOL_RESET);
1270
1271    if (IS_GEN7(intelScreen->deviceID)) {
1272       intelScreen->gen = 7;
1273    } else if (IS_GEN6(intelScreen->deviceID)) {
1274       intelScreen->gen = 6;
1275    } else if (IS_GEN5(intelScreen->deviceID)) {
1276       intelScreen->gen = 5;
1277    } else if (IS_965(intelScreen->deviceID)) {
1278       intelScreen->gen = 4;
1279    } else if (IS_9XX(intelScreen->deviceID)) {
1280       intelScreen->gen = 3;
1281    } else {
1282       intelScreen->gen = 2;
1283    }
1284
1285    intelScreen->hw_has_separate_stencil = intelScreen->gen >= 6;
1286    intelScreen->hw_must_use_separate_stencil = intelScreen->gen >= 7;
1287
1288    int has_llc = 0;
1289    bool success = intel_get_param(intelScreen->driScrnPriv, I915_PARAM_HAS_LLC,
1290                                   &has_llc);
1291    if (success && has_llc)
1292       intelScreen->hw_has_llc = true;
1293    else if (!success && intelScreen->gen >= 6)
1294       intelScreen->hw_has_llc = true;
1295
1296    intel_override_separate_stencil(intelScreen);
1297
1298    intelScreen->hw_has_swizzling = intel_detect_swizzling(intelScreen);
1299
1300    set_max_gl_versions(intelScreen);
1301
1302    psp->api_mask = (1 << __DRI_API_OPENGL);
1303    if (intelScreen->max_gl_core_version > 0)
1304       psp->api_mask |= (1 << __DRI_API_OPENGL_CORE);
1305    if (intelScreen->max_gl_es1_version > 0)
1306       psp->api_mask |= (1 << __DRI_API_GLES);
1307    if (intelScreen->max_gl_es2_version > 0)
1308       psp->api_mask |= (1 << __DRI_API_GLES2);
1309    if (intelScreen->max_gl_es2_version >= 30)
1310       psp->api_mask |= (1 << __DRI_API_GLES3);
1311
1312    psp->extensions = intelScreenExtensions;
1313
1314    return (const __DRIconfig**) intel_screen_make_configs(psp);
1315 }
1316
1317 struct intel_buffer {
1318    __DRIbuffer base;
1319    struct intel_region *region;
1320 };
1321
1322 static __DRIbuffer *
1323 intelAllocateBuffer(__DRIscreen *screen,
1324                     unsigned attachment, unsigned format,
1325                     int width, int height)
1326 {
1327    struct intel_buffer *intelBuffer;
1328    struct intel_screen *intelScreen = screen->driverPrivate;
1329
1330    assert(attachment == __DRI_BUFFER_FRONT_LEFT ||
1331           attachment == __DRI_BUFFER_BACK_LEFT);
1332
1333    intelBuffer = calloc(1, sizeof *intelBuffer);
1334    if (intelBuffer == NULL)
1335       return NULL;
1336
1337    /* The front and back buffers are color buffers, which are X tiled. */
1338    intelBuffer->region = intel_region_alloc(intelScreen,
1339                                             I915_TILING_X,
1340                                             format / 8,
1341                                             width,
1342                                             height,
1343                                             true);
1344
1345    if (intelBuffer->region == NULL) {
1346            free(intelBuffer);
1347            return NULL;
1348    }
1349
1350    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
1351
1352    intelBuffer->base.attachment = attachment;
1353    intelBuffer->base.cpp = intelBuffer->region->cpp;
1354    intelBuffer->base.pitch = intelBuffer->region->pitch;
1355
1356    return &intelBuffer->base;
1357 }
1358
1359 static void
1360 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
1361 {
1362    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
1363
1364    intel_region_release(&intelBuffer->region);
1365    free(intelBuffer);
1366 }
1367
1368
1369 const struct __DriverAPIRec driDriverAPI = {
1370    .InitScreen           = intelInitScreen2,
1371    .DestroyScreen        = intelDestroyScreen,
1372    .CreateContext        = intelCreateContext,
1373    .DestroyContext       = intelDestroyContext,
1374    .CreateBuffer         = intelCreateBuffer,
1375    .DestroyBuffer        = intelDestroyBuffer,
1376    .MakeCurrent          = intelMakeCurrent,
1377    .UnbindContext        = intelUnbindContext,
1378    .AllocateBuffer       = intelAllocateBuffer,
1379    .ReleaseBuffer        = intelReleaseBuffer
1380 };
1381
1382 /* This is the table of extensions that the loader will dlsym() for. */
1383 PUBLIC const __DRIextension *__driDriverExtensions[] = {
1384     &driCoreExtension.base,
1385     &driDRI2Extension.base,
1386     NULL
1387 };