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_OPT_BEGIN_B(disable_derivative_optimization, "false")
  62          DRI_CONF_DESC(en, "Derivatives with finer granularity by default")
  63       DRI_CONF_OPT_END
  64
  65    DRI_CONF_SECTION_END
  66    DRI_CONF_SECTION_QUALITY
  67       DRI_CONF_FORCE_S3TC_ENABLE("false")
  68    DRI_CONF_SECTION_END
  69    DRI_CONF_SECTION_DEBUG
  70       DRI_CONF_NO_RAST("false")
  71       DRI_CONF_ALWAYS_FLUSH_BATCH("false")
  72       DRI_CONF_ALWAYS_FLUSH_CACHE("false")
  73       DRI_CONF_DISABLE_THROTTLING("false")
  74       DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN("false")
  75       DRI_CONF_DISABLE_GLSL_LINE_CONTINUATIONS("false")
  76       DRI_CONF_DISABLE_BLEND_FUNC_EXTENDED("false")
  77
  78       DRI_CONF_OPT_BEGIN_B(shader_precompile, "true")
  79          DRI_CONF_DESC(en, "Perform code generation at shader link time.")
  80       DRI_CONF_OPT_END
  81    DRI_CONF_SECTION_END
  82 DRI_CONF_END;
  83
  84 #include "intel_batchbuffer.h"
  85 #include "intel_buffers.h"
  86 #include "intel_bufmgr.h"
  87 #include "intel_chipset.h"
  88 #include "intel_fbo.h"
  89 #include "intel_mipmap_tree.h"
  90 #include "intel_screen.h"
  91 #include "intel_tex.h"
  92 #include "intel_regions.h"
  93
  94 #include "brw_context.h"
  95
  96 #include "i915_drm.h"
  97
  98 #ifdef USE_NEW_INTERFACE
  99 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
 100 #endif /*USE_NEW_INTERFACE */
 101
 102 /**
 103  * For debugging purposes, this returns a time in seconds.
 104  */
 105 double
 106 get_time(void)
 107 {
 108    struct timespec tp;
 109
 110    clock_gettime(CLOCK_MONOTONIC, &tp);
 111
 112    return tp.tv_sec + tp.tv_nsec / 1000000000.0;
 113 }
 114
 115 void
 116 aub_dump_bmp(struct gl_context *ctx)
 117 {
 118    struct gl_framebuffer *fb = ctx->DrawBuffer;
 119
 120    for (int i = 0; i < fb->_NumColorDrawBuffers; i++) {
 121       struct intel_renderbuffer *irb =
 122          intel_renderbuffer(fb->_ColorDrawBuffers[i]);
 123
 124       if (irb && irb->mt) {
 125          enum aub_dump_bmp_format format;
 126
 127          switch (irb->Base.Base.Format) {
 128          case MESA_FORMAT_ARGB8888:
 129          case MESA_FORMAT_XRGB8888:
 130             format = AUB_DUMP_BMP_FORMAT_ARGB_8888;
 131             break;
 132          default:
 133             continue;
 134          }
 135
 136          assert(irb->mt->region->pitch % irb->mt->region->cpp == 0);
 137          drm_intel_gem_bo_aub_dump_bmp(irb->mt->region->bo,
 138                                        irb->draw_x,
 139                                        irb->draw_y,
 140                                        irb->Base.Base.Width,
 141                                        irb->Base.Base.Height,
 142                                        format,
 143                                        irb->mt->region->pitch,
 144                                        0);
 145       }
 146    }
 147 }
 148
 149 static const __DRItexBufferExtension intelTexBufferExtension = {
 150    .base = { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 151
 152    .setTexBuffer        = intelSetTexBuffer,
 153    .setTexBuffer2       = intelSetTexBuffer2,
 154    .releaseTexBuffer    = NULL,
 155 };
 156
 157 static void
 158 intel_dri2_flush_with_flags(__DRIcontext *cPriv,
 159                             __DRIdrawable *dPriv,
 160                             unsigned flags,
 161                             enum __DRI2throttleReason reason)
 162 {
 163    struct brw_context *brw = cPriv->driverPrivate;
 164
 165    if (!brw)
 166       return;
 167
 168    struct gl_context *ctx = &brw->ctx;
 169
 170    FLUSH_VERTICES(ctx, 0);
 171
 172    if (flags & __DRI2_FLUSH_DRAWABLE)
 173       intel_resolve_for_dri2_flush(brw, dPriv);
 174
 175    if (reason == __DRI2_THROTTLE_SWAPBUFFER ||
 176        reason == __DRI2_THROTTLE_FLUSHFRONT) {
 177       brw->need_throttle = true;
 178    }
 179
 180    intel_batchbuffer_flush(brw);
 181
 182    if (INTEL_DEBUG & DEBUG_AUB) {
 183       aub_dump_bmp(ctx);
 184    }
 185 }
 186
 187 /**
 188  * Provides compatibility with loaders that only support the older (version
 189  * 1-3) flush interface.
 190  *
 191  * That includes libGL up to Mesa 9.0, and the X Server at least up to 1.13.
 192  */
 193 static void
 194 intel_dri2_flush(__DRIdrawable *drawable)
 195 {
 196    intel_dri2_flush_with_flags(drawable->driContextPriv, drawable,
 197                                __DRI2_FLUSH_DRAWABLE,
 198                                __DRI2_THROTTLE_SWAPBUFFER);
 199 }
 200
 201 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 202     .base = { __DRI2_FLUSH, 4 },
 203
 204     .flush              = intel_dri2_flush,
 205     .invalidate         = dri2InvalidateDrawable,
 206     .flush_with_flags   = intel_dri2_flush_with_flags,
 207 };
 208
 209 static struct intel_image_format intel_image_formats[] = {
 210    { __DRI_IMAGE_FOURCC_ARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
 211      { { 0, 0, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } },
 212
 213    { __DRI_IMAGE_FOURCC_XRGB8888, __DRI_IMAGE_COMPONENTS_RGB, 1,
 214      { { 0, 0, 0, __DRI_IMAGE_FORMAT_XRGB8888, 4 }, } },
 215
 216    { __DRI_IMAGE_FOURCC_YUV410, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 217      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 218        { 1, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 },
 219        { 2, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 } } },
 220
 221    { __DRI_IMAGE_FOURCC_YUV411, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 222      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 223        { 1, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 224        { 2, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 225
 226    { __DRI_IMAGE_FOURCC_YUV420, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 227      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 228        { 1, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 },
 229        { 2, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 } } },
 230
 231    { __DRI_IMAGE_FOURCC_YUV422, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 232      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 233        { 1, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 234        { 2, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 235
 236    { __DRI_IMAGE_FOURCC_YUV444, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 237      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 238        { 1, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 239        { 2, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 240
 241    { __DRI_IMAGE_FOURCC_NV12, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 242      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 243        { 1, 1, 1, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 244
 245    { __DRI_IMAGE_FOURCC_NV16, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 246      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 247        { 1, 1, 0, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 248
 249    /* For YUYV buffers, we set up two overlapping DRI images and treat
 250     * them as planar buffers in the compositors.  Plane 0 is GR88 and
 251     * samples YU or YV pairs and places Y into the R component, while
 252     * plane 1 is ARGB and samples YUYV clusters and places pairs and
 253     * places U into the G component and V into A.  This lets the
 254     * texture sampler interpolate the Y components correctly when
 255     * sampling from plane 0, and interpolate U and V correctly when
 256     * sampling from plane 1. */
 257    { __DRI_IMAGE_FOURCC_YUYV, __DRI_IMAGE_COMPONENTS_Y_XUXV, 2,
 258      { { 0, 0, 0, __DRI_IMAGE_FORMAT_GR88, 2 },
 259        { 0, 1, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } }
 260 };
 261
 262 static struct intel_image_format *
 263 intel_image_format_lookup(int fourcc)
 264 {
 265    struct intel_image_format *f = NULL;
 266
 267    for (unsigned i = 0; i < ARRAY_SIZE(intel_image_formats); i++) {
 268       if (intel_image_formats[i].fourcc == fourcc) {
 269          f = &intel_image_formats[i];
 270          break;
 271       }
 272    }
 273
 274    return f;
 275 }
 276
 277 static __DRIimage *
 278 intel_allocate_image(int dri_format, void *loaderPrivate)
 279 {
 280     __DRIimage *image;
 281
 282     image = calloc(1, sizeof *image);
 283     if (image == NULL)
 284         return NULL;
 285
 286     image->dri_format = dri_format;
 287     image->offset = 0;
 288
 289     switch (dri_format) {
 290     case __DRI_IMAGE_FORMAT_RGB565:
 291        image->format = MESA_FORMAT_RGB565;
 292        break;
 293     case __DRI_IMAGE_FORMAT_XRGB8888:
 294        image->format = MESA_FORMAT_XRGB8888;
 295        break;
 296     case __DRI_IMAGE_FORMAT_ARGB8888:
 297        image->format = MESA_FORMAT_ARGB8888;
 298        break;
 299     case __DRI_IMAGE_FORMAT_ABGR8888:
 300        image->format = MESA_FORMAT_RGBA8888_REV;
 301        break;
 302     case __DRI_IMAGE_FORMAT_XBGR8888:
 303        image->format = MESA_FORMAT_RGBX8888_REV;
 304        break;
 305     case __DRI_IMAGE_FORMAT_R8:
 306        image->format = MESA_FORMAT_R8;
 307        break;
 308     case __DRI_IMAGE_FORMAT_GR88:
 309        image->format = MESA_FORMAT_GR88;
 310        break;
 311     case __DRI_IMAGE_FORMAT_NONE:
 312        image->format = MESA_FORMAT_NONE;
 313        break;
 314     default:
 315        free(image);
 316        return NULL;
 317     }
 318
 319     image->internal_format = _mesa_get_format_base_format(image->format);
 320     image->data = loaderPrivate;
 321
 322     return image;
 323 }
 324
 325 /**
 326  * Sets up a DRIImage structure to point to our shared image in a region
 327  */
 328 static void
 329 intel_setup_image_from_mipmap_tree(struct brw_context *brw, __DRIimage *image,
 330                                    struct intel_mipmap_tree *mt, GLuint level,
 331                                    GLuint zoffset)
 332 {
 333    unsigned int draw_x, draw_y;
 334    uint32_t mask_x, mask_y;
 335
 336    intel_miptree_make_shareable(brw, mt);
 337
 338    intel_miptree_check_level_layer(mt, level, zoffset);
 339
 340    intel_region_get_tile_masks(mt->region, &mask_x, &mask_y, false);
 341    intel_miptree_get_image_offset(mt, level, zoffset, &draw_x, &draw_y);
 342
 343    image->width = mt->level[level].width;
 344    image->height = mt->level[level].height;
 345    image->tile_x = draw_x & mask_x;
 346    image->tile_y = draw_y & mask_y;
 347
 348    image->offset = intel_region_get_aligned_offset(mt->region,
 349                                                    draw_x & ~mask_x,
 350                                                    draw_y & ~mask_y,
 351                                                    false);
 352
 353    intel_region_reference(&image->region, mt->region);
 354 }
 355
 356 static void
 357 intel_setup_image_from_dimensions(__DRIimage *image)
 358 {
 359    image->width    = image->region->width;
 360    image->height   = image->region->height;
 361    image->tile_x = 0;
 362    image->tile_y = 0;
 363    image->has_depthstencil = false;
 364 }
 365
 366 static inline uint32_t
 367 intel_dri_format(GLuint format)
 368 {
 369    switch (format) {
 370    case MESA_FORMAT_RGB565:
 371       return __DRI_IMAGE_FORMAT_RGB565;
 372    case MESA_FORMAT_XRGB8888:
 373       return __DRI_IMAGE_FORMAT_XRGB8888;
 374    case MESA_FORMAT_ARGB8888:
 375       return __DRI_IMAGE_FORMAT_ARGB8888;
 376    case MESA_FORMAT_RGBA8888_REV:
 377       return __DRI_IMAGE_FORMAT_ABGR8888;
 378    case MESA_FORMAT_R8:
 379       return __DRI_IMAGE_FORMAT_R8;
 380    case MESA_FORMAT_RG88:
 381       return __DRI_IMAGE_FORMAT_GR88;
 382    }
 383
 384    return MESA_FORMAT_NONE;
 385 }
 386
 387 static __DRIimage *
 388 intel_create_image_from_name(__DRIscreen *screen,
 389                              int width, int height, int format,
 390                              int name, int pitch, void *loaderPrivate)
 391 {
 392     struct intel_screen *intelScreen = screen->driverPrivate;
 393     __DRIimage *image;
 394     int cpp;
 395
 396     image = intel_allocate_image(format, loaderPrivate);
 397     if (image == NULL)
 398        return NULL;
 399
 400     if (image->format == MESA_FORMAT_NONE)
 401        cpp = 1;
 402     else
 403        cpp = _mesa_get_format_bytes(image->format);
 404     image->region = intel_region_alloc_for_handle(intelScreen,
 405                                                   cpp, width, height,
 406                                                   pitch * cpp, name, "image");
 407     if (image->region == NULL) {
 408        free(image);
 409        return NULL;
 410     }
 411
 412     intel_setup_image_from_dimensions(image);
 413
 414     return image;
 415 }
 416
 417 static __DRIimage *
 418 intel_create_image_from_renderbuffer(__DRIcontext *context,
 419                                      int renderbuffer, void *loaderPrivate)
 420 {
 421    __DRIimage *image;
 422    struct brw_context *brw = context->driverPrivate;
 423    struct gl_context *ctx = &brw->ctx;
 424    struct gl_renderbuffer *rb;
 425    struct intel_renderbuffer *irb;
 426
 427    rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 428    if (!rb) {
 429       _mesa_error(ctx, GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 430       return NULL;
 431    }
 432
 433    irb = intel_renderbuffer(rb);
 434    intel_miptree_make_shareable(brw, irb->mt);
 435    image = calloc(1, sizeof *image);
 436    if (image == NULL)
 437       return NULL;
 438
 439    image->internal_format = rb->InternalFormat;
 440    image->format = rb->Format;
 441    image->offset = 0;
 442    image->data = loaderPrivate;
 443    intel_region_reference(&image->region, irb->mt->region);
 444    intel_setup_image_from_dimensions(image);
 445    image->dri_format = intel_dri_format(image->format);
 446    image->has_depthstencil = irb->mt->stencil_mt? true : false;
 447
 448    rb->NeedsFinishRenderTexture = true;
 449    return image;
 450 }
 451
 452 static __DRIimage *
 453 intel_create_image_from_texture(__DRIcontext *context, int target,
 454                                 unsigned texture, int zoffset,
 455                                 int level,
 456                                 unsigned *error,
 457                                 void *loaderPrivate)
 458 {
 459    __DRIimage *image;
 460    struct brw_context *brw = context->driverPrivate;
 461    struct gl_texture_object *obj;
 462    struct intel_texture_object *iobj;
 463    GLuint face = 0;
 464
 465    obj = _mesa_lookup_texture(&brw->ctx, texture);
 466    if (!obj || obj->Target != target) {
 467       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 468       return NULL;
 469    }
 470
 471    if (target == GL_TEXTURE_CUBE_MAP)
 472       face = zoffset;
 473
 474    _mesa_test_texobj_completeness(&brw->ctx, obj);
 475    iobj = intel_texture_object(obj);
 476    if (!obj->_BaseComplete || (level > 0 && !obj->_MipmapComplete)) {
 477       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 478       return NULL;
 479    }
 480
 481    if (level < obj->BaseLevel || level > obj->_MaxLevel) {
 482       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 483       return NULL;
 484    }
 485
 486    if (target == GL_TEXTURE_3D && obj->Image[face][level]->Depth < zoffset) {
 487       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 488       return NULL;
 489    }
 490    image = calloc(1, sizeof *image);
 491    if (image == NULL) {
 492       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
 493       return NULL;
 494    }
 495
 496    image->internal_format = obj->Image[face][level]->InternalFormat;
 497    image->format = obj->Image[face][level]->TexFormat;
 498    image->data = loaderPrivate;
 499    intel_setup_image_from_mipmap_tree(brw, image, iobj->mt, level, zoffset);
 500    image->dri_format = intel_dri_format(image->format);
 501    image->has_depthstencil = iobj->mt->stencil_mt? true : false;
 502    if (image->dri_format == MESA_FORMAT_NONE) {
 503       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 504       free(image);
 505       return NULL;
 506    }
 507
 508    *error = __DRI_IMAGE_ERROR_SUCCESS;
 509    return image;
 510 }
 511
 512 static void
 513 intel_destroy_image(__DRIimage *image)
 514 {
 515     intel_region_release(&image->region);
 516     free(image);
 517 }
 518
 519 static __DRIimage *
 520 intel_create_image(__DRIscreen *screen,
 521                    int width, int height, int format,
 522                    unsigned int use,
 523                    void *loaderPrivate)
 524 {
 525    __DRIimage *image;
 526    struct intel_screen *intelScreen = screen->driverPrivate;
 527    uint32_t tiling;
 528    int cpp;
 529
 530    tiling = I915_TILING_X;
 531    if (use & __DRI_IMAGE_USE_CURSOR) {
 532       if (width != 64 || height != 64)
 533          return NULL;
 534       tiling = I915_TILING_NONE;
 535    }
 536
 537    if (use & __DRI_IMAGE_USE_LINEAR)
 538       tiling = I915_TILING_NONE;
 539
 540    image = intel_allocate_image(format, loaderPrivate);
 541    if (image == NULL)
 542       return NULL;
 543
 544    cpp = _mesa_get_format_bytes(image->format);
 545    image->region =
 546       intel_region_alloc(intelScreen, tiling, cpp, width, height, true);
 547    if (image->region == NULL) {
 548       free(image);
 549       return NULL;
 550    }
 551
 552    intel_setup_image_from_dimensions(image);
 553
 554    return image;
 555 }
 556
 557 static GLboolean
 558 intel_query_image(__DRIimage *image, int attrib, int *value)
 559 {
 560    switch (attrib) {
 561    case __DRI_IMAGE_ATTRIB_STRIDE:
 562       *value = image->region->pitch;
 563       return true;
 564    case __DRI_IMAGE_ATTRIB_HANDLE:
 565       *value = image->region->bo->handle;
 566       return true;
 567    case __DRI_IMAGE_ATTRIB_NAME:
 568       return intel_region_flink(image->region, (uint32_t *) value);
 569    case __DRI_IMAGE_ATTRIB_FORMAT:
 570       *value = image->dri_format;
 571       return true;
 572    case __DRI_IMAGE_ATTRIB_WIDTH:
 573       *value = image->region->width;
 574       return true;
 575    case __DRI_IMAGE_ATTRIB_HEIGHT:
 576       *value = image->region->height;
 577       return true;
 578    case __DRI_IMAGE_ATTRIB_COMPONENTS:
 579       if (image->planar_format == NULL)
 580          return false;
 581       *value = image->planar_format->components;
 582       return true;
 583    case __DRI_IMAGE_ATTRIB_FD:
 584       if (drm_intel_bo_gem_export_to_prime(image->region->bo, value) == 0)
 585          return true;
 586       return false;
 587   default:
 588       return false;
 589    }
 590 }
 591
 592 static __DRIimage *
 593 intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
 594 {
 595    __DRIimage *image;
 596
 597    image = calloc(1, sizeof *image);
 598    if (image == NULL)
 599       return NULL;
 600
 601    intel_region_reference(&image->region, orig_image->region);
 602    if (image->region == NULL) {
 603       free(image);
 604       return NULL;
 605    }
 606
 607    image->internal_format = orig_image->internal_format;
 608    image->planar_format   = orig_image->planar_format;
 609    image->dri_format      = orig_image->dri_format;
 610    image->format          = orig_image->format;
 611    image->offset          = orig_image->offset;
 612    image->width           = orig_image->width;
 613    image->height          = orig_image->height;
 614    image->tile_x          = orig_image->tile_x;
 615    image->tile_y          = orig_image->tile_y;
 616    image->has_depthstencil = orig_image->has_depthstencil;
 617    image->data            = loaderPrivate;
 618
 619    memcpy(image->strides, orig_image->strides, sizeof(image->strides));
 620    memcpy(image->offsets, orig_image->offsets, sizeof(image->offsets));
 621
 622    return image;
 623 }
 624
 625 static GLboolean
 626 intel_validate_usage(__DRIimage *image, unsigned int use)
 627 {
 628    if (use & __DRI_IMAGE_USE_CURSOR) {
 629       if (image->region->width != 64 || image->region->height != 64)
 630          return GL_FALSE;
 631    }
 632
 633    return GL_TRUE;
 634 }
 635
 636 static __DRIimage *
 637 intel_create_image_from_names(__DRIscreen *screen,
 638                               int width, int height, int fourcc,
 639                               int *names, int num_names,
 640                               int *strides, int *offsets,
 641                               void *loaderPrivate)
 642 {
 643     struct intel_image_format *f = NULL;
 644     __DRIimage *image;
 645     int i, index;
 646
 647     if (screen == NULL || names == NULL || num_names != 1)
 648         return NULL;
 649
 650     f = intel_image_format_lookup(fourcc);
 651     if (f == NULL)
 652         return NULL;
 653
 654     image = intel_create_image_from_name(screen, width, height,
 655                                          __DRI_IMAGE_FORMAT_NONE,
 656                                          names[0], strides[0],
 657                                          loaderPrivate);
 658
 659    if (image == NULL)
 660       return NULL;
 661
 662     image->planar_format = f;
 663     for (i = 0; i < f->nplanes; i++) {
 664         index = f->planes[i].buffer_index;
 665         image->offsets[index] = offsets[index];
 666         image->strides[index] = strides[index];
 667     }
 668
 669     return image;
 670 }
 671
 672 static __DRIimage *
 673 intel_create_image_from_fds(__DRIscreen *screen,
 674                             int width, int height, int fourcc,
 675                             int *fds, int num_fds, int *strides, int *offsets,
 676                             void *loaderPrivate)
 677 {
 678    struct intel_screen *intelScreen = screen->driverPrivate;
 679    struct intel_image_format *f;
 680    __DRIimage *image;
 681    int i, index;
 682
 683    if (fds == NULL || num_fds != 1)
 684       return NULL;
 685
 686    f = intel_image_format_lookup(fourcc);
 687    if (f == NULL)
 688       return NULL;
 689
 690    if (f->nplanes == 1)
 691       image = intel_allocate_image(f->planes[0].dri_format, loaderPrivate);
 692    else
 693       image = intel_allocate_image(__DRI_IMAGE_FORMAT_NONE, loaderPrivate);
 694
 695    if (image == NULL)
 696       return NULL;
 697
 698    image->region = intel_region_alloc_for_fd(intelScreen,
 699                                              1, width, height,
 700                                              strides[0], fds[0], "image");
 701    if (image->region == NULL) {
 702       free(image);
 703       return NULL;
 704    }
 705
 706    image->planar_format = f;
 707    for (i = 0; i < f->nplanes; i++) {
 708       index = f->planes[i].buffer_index;
 709       image->offsets[index] = offsets[index];
 710       image->strides[index] = strides[index];
 711    }
 712
 713    intel_setup_image_from_dimensions(image);
 714
 715    return image;
 716 }
 717
 718 static __DRIimage *
 719 intel_create_image_from_dma_bufs(__DRIscreen *screen,
 720                                  int width, int height, int fourcc,
 721                                  int *fds, int num_fds,
 722                                  int *strides, int *offsets,
 723                                  enum __DRIYUVColorSpace yuv_color_space,
 724                                  enum __DRISampleRange sample_range,
 725                                  enum __DRIChromaSiting horizontal_siting,
 726                                  enum __DRIChromaSiting vertical_siting,
 727                                  unsigned *error,
 728                                  void *loaderPrivate)
 729 {
 730    __DRIimage *image;
 731    struct intel_image_format *f = intel_image_format_lookup(fourcc);
 732
 733    /* For now only packed formats that have native sampling are supported. */
 734    if (!f || f->nplanes != 1) {
 735       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 736       return NULL;
 737    }
 738
 739    image = intel_create_image_from_fds(screen, width, height, fourcc, fds,
 740                                        num_fds, strides, offsets,
 741                                        loaderPrivate);
 742
 743    /*
 744     * Invalid parameters and any inconsistencies between are assumed to be
 745     * checked by the caller. Therefore besides unsupported formats one can fail
 746     * only in allocation.
 747     */
 748    if (!image) {
 749       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
 750       return NULL;
 751    }
 752
 753    image->dma_buf_imported = true;
 754    image->yuv_color_space = yuv_color_space;
 755    image->sample_range = sample_range;
 756    image->horizontal_siting = horizontal_siting;
 757    image->vertical_siting = vertical_siting;
 758
 759    *error = __DRI_IMAGE_ERROR_SUCCESS;
 760    return image;
 761 }
 762
 763 static __DRIimage *
 764 intel_from_planar(__DRIimage *parent, int plane, void *loaderPrivate)
 765 {
 766     int width, height, offset, stride, dri_format, index;
 767     struct intel_image_format *f;
 768     uint32_t mask_x, mask_y;
 769     __DRIimage *image;
 770
 771     if (parent == NULL || parent->planar_format == NULL)
 772         return NULL;
 773
 774     f = parent->planar_format;
 775
 776     if (plane >= f->nplanes)
 777         return NULL;
 778
 779     width = parent->region->width >> f->planes[plane].width_shift;
 780     height = parent->region->height >> f->planes[plane].height_shift;
 781     dri_format = f->planes[plane].dri_format;
 782     index = f->planes[plane].buffer_index;
 783     offset = parent->offsets[index];
 784     stride = parent->strides[index];
 785
 786     image = intel_allocate_image(dri_format, loaderPrivate);
 787     if (image == NULL)
 788        return NULL;
 789
 790     if (offset + height * stride > parent->region->bo->size) {
 791        _mesa_warning(NULL, "intel_create_sub_image: subimage out of bounds");
 792        free(image);
 793        return NULL;
 794     }
 795
 796     image->region = calloc(sizeof(*image->region), 1);
 797     if (image->region == NULL) {
 798        free(image);
 799        return NULL;
 800     }
 801
 802     image->region->cpp = _mesa_get_format_bytes(image->format);
 803     image->region->width = width;
 804     image->region->height = height;
 805     image->region->pitch = stride;
 806     image->region->refcount = 1;
 807     image->region->bo = parent->region->bo;
 808     drm_intel_bo_reference(image->region->bo);
 809     image->region->tiling = parent->region->tiling;
 810     image->offset = offset;
 811     intel_setup_image_from_dimensions(image);
 812
 813     intel_region_get_tile_masks(image->region, &mask_x, &mask_y, false);
 814     if (offset & mask_x)
 815        _mesa_warning(NULL,
 816                      "intel_create_sub_image: offset not on tile boundary");
 817
 818     return image;
 819 }
 820
 821 static struct __DRIimageExtensionRec intelImageExtension = {
 822     .base = { __DRI_IMAGE, 8 },
 823
 824     .createImageFromName                = intel_create_image_from_name,
 825     .createImageFromRenderbuffer        = intel_create_image_from_renderbuffer,
 826     .destroyImage                       = intel_destroy_image,
 827     .createImage                        = intel_create_image,
 828     .queryImage                         = intel_query_image,
 829     .dupImage                           = intel_dup_image,
 830     .validateUsage                      = intel_validate_usage,
 831     .createImageFromNames               = intel_create_image_from_names,
 832     .fromPlanar                         = intel_from_planar,
 833     .createImageFromTexture             = intel_create_image_from_texture,
 834     .createImageFromFds                 = intel_create_image_from_fds,
 835     .createImageFromDmaBufs             = intel_create_image_from_dma_bufs
 836 };
 837
 838 static const __DRIextension *intelScreenExtensions[] = {
 839     &intelTexBufferExtension.base,
 840     &intelFlushExtension.base,
 841     &intelImageExtension.base,
 842     &dri2ConfigQueryExtension.base,
 843     NULL
 844 };
 845
 846 static bool
 847 intel_get_param(__DRIscreen *psp, int param, int *value)
 848 {
 849    int ret;
 850    struct drm_i915_getparam gp;
 851
 852    memset(&gp, 0, sizeof(gp));
 853    gp.param = param;
 854    gp.value = value;
 855
 856    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 857    if (ret) {
 858       if (ret != -EINVAL)
 859          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 860       return false;
 861    }
 862
 863    return true;
 864 }
 865
 866 static bool
 867 intel_get_boolean(__DRIscreen *psp, int param)
 868 {
 869    int value = 0;
 870    return intel_get_param(psp, param, &value) && value;
 871 }
 872
 873 static void
 874 intelDestroyScreen(__DRIscreen * sPriv)
 875 {
 876    struct intel_screen *intelScreen = sPriv->driverPrivate;
 877
 878    dri_bufmgr_destroy(intelScreen->bufmgr);
 879    driDestroyOptionInfo(&intelScreen->optionCache);
 880
 881    free(intelScreen);
 882    sPriv->driverPrivate = NULL;
 883 }
 884
 885
 886 /**
 887  * This is called when we need to set up GL rendering to a new X window.
 888  */
 889 static GLboolean
 890 intelCreateBuffer(__DRIscreen * driScrnPriv,
 891                   __DRIdrawable * driDrawPriv,
 892                   const struct gl_config * mesaVis, GLboolean isPixmap)
 893 {
 894    struct intel_renderbuffer *rb;
 895    struct intel_screen *screen = (struct intel_screen*) driScrnPriv->driverPrivate;
 896    gl_format rgbFormat;
 897    unsigned num_samples = intel_quantize_num_samples(screen, mesaVis->samples);
 898    struct gl_framebuffer *fb;
 899
 900    if (isPixmap)
 901       return false;
 902
 903    fb = CALLOC_STRUCT(gl_framebuffer);
 904    if (!fb)
 905       return false;
 906
 907    _mesa_initialize_window_framebuffer(fb, mesaVis);
 908
 909    if (mesaVis->redBits == 5)
 910       rgbFormat = MESA_FORMAT_RGB565;
 911    else if (mesaVis->sRGBCapable)
 912       rgbFormat = MESA_FORMAT_SARGB8;
 913    else if (mesaVis->alphaBits == 0)
 914       rgbFormat = MESA_FORMAT_XRGB8888;
 915    else {
 916       rgbFormat = MESA_FORMAT_SARGB8;
 917       fb->Visual.sRGBCapable = true;
 918    }
 919
 920    /* setup the hardware-based renderbuffers */
 921    rb = intel_create_renderbuffer(rgbFormat, num_samples);
 922    _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base.Base);
 923
 924    if (mesaVis->doubleBufferMode) {
 925       rb = intel_create_renderbuffer(rgbFormat, num_samples);
 926       _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base.Base);
 927    }
 928
 929    /*
 930     * Assert here that the gl_config has an expected depth/stencil bit
 931     * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
 932     * which constructs the advertised configs.)
 933     */
 934    if (mesaVis->depthBits == 24) {
 935       assert(mesaVis->stencilBits == 8);
 936
 937       if (screen->hw_has_separate_stencil) {
 938          rb = intel_create_private_renderbuffer(MESA_FORMAT_X8_Z24,
 939                                                 num_samples);
 940          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 941          rb = intel_create_private_renderbuffer(MESA_FORMAT_S8,
 942                                                 num_samples);
 943          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 944       } else {
 945          /*
 946           * Use combined depth/stencil. Note that the renderbuffer is
 947           * attached to two attachment points.
 948           */
 949          rb = intel_create_private_renderbuffer(MESA_FORMAT_S8_Z24,
 950                                                 num_samples);
 951          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 952          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 953       }
 954    }
 955    else if (mesaVis->depthBits == 16) {
 956       assert(mesaVis->stencilBits == 0);
 957       rb = intel_create_private_renderbuffer(MESA_FORMAT_Z16,
 958                                              num_samples);
 959       _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 960    }
 961    else {
 962       assert(mesaVis->depthBits == 0);
 963       assert(mesaVis->stencilBits == 0);
 964    }
 965
 966    /* now add any/all software-based renderbuffers we may need */
 967    _swrast_add_soft_renderbuffers(fb,
 968                                   false, /* never sw color */
 969                                   false, /* never sw depth */
 970                                   false, /* never sw stencil */
 971                                   mesaVis->accumRedBits > 0,
 972                                   false, /* never sw alpha */
 973                                   false  /* never sw aux */ );
 974    driDrawPriv->driverPrivate = fb;
 975
 976    return true;
 977 }
 978
 979 static void
 980 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 981 {
 982     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 983
 984     _mesa_reference_framebuffer(&fb, NULL);
 985 }
 986
 987 static bool
 988 intel_init_bufmgr(struct intel_screen *intelScreen)
 989 {
 990    __DRIscreen *spriv = intelScreen->driScrnPriv;
 991
 992    intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
 993
 994    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 995    if (intelScreen->bufmgr == NULL) {
 996       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 997               __func__, __LINE__);
 998       return false;
 999    }
1000
1001    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
1002
1003    if (!intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA)) {
1004       fprintf(stderr, "[%s: %u] Kernel 2.6.39 required.\n", __func__, __LINE__);
1005       return false;
1006    }
1007
1008    return true;
1009 }
1010
1011 /**
1012  * Override intel_screen.hw_has_separate_stencil with environment variable
1013  * INTEL_SEPARATE_STENCIL.
1014  *
1015  * Valid values for INTEL_SEPARATE_STENCIL are "0" and "1". If an invalid
1016  * valid value is encountered, a warning is emitted and INTEL_SEPARATE_STENCIL
1017  * is ignored.
1018  */
1019 static void
1020 intel_override_separate_stencil(struct intel_screen *screen)
1021 {
1022    const char *s = getenv("INTEL_SEPARATE_STENCIL");
1023    if (!s) {
1024       return;
1025    } else if (!strncmp("0", s, 2)) {
1026       screen->hw_has_separate_stencil = false;
1027    } else if (!strncmp("1", s, 2)) {
1028       screen->hw_has_separate_stencil = true;
1029    } else {
1030       fprintf(stderr,
1031               "warning: env variable INTEL_SEPARATE_STENCIL=\"%s\" has "
1032               "invalid value and is ignored", s);
1033    }
1034 }
1035
1036 static bool
1037 intel_detect_swizzling(struct intel_screen *screen)
1038 {
1039    drm_intel_bo *buffer;
1040    unsigned long flags = 0;
1041    unsigned long aligned_pitch;
1042    uint32_t tiling = I915_TILING_X;
1043    uint32_t swizzle_mode = 0;
1044
1045    buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "swizzle test",
1046                                      64, 64, 4,
1047                                      &tiling, &aligned_pitch, flags);
1048    if (buffer == NULL)
1049       return false;
1050
1051    drm_intel_bo_get_tiling(buffer, &tiling, &swizzle_mode);
1052    drm_intel_bo_unreference(buffer);
1053
1054    if (swizzle_mode == I915_BIT_6_SWIZZLE_NONE)
1055       return false;
1056    else
1057       return true;
1058 }
1059
1060 static __DRIconfig**
1061 intel_screen_make_configs(__DRIscreen *dri_screen)
1062 {
1063    static const gl_format formats[] = {
1064       MESA_FORMAT_RGB565,
1065       MESA_FORMAT_ARGB8888
1066    };
1067
1068    /* GLX_SWAP_COPY_OML is not supported due to page flipping. */
1069    static const GLenum back_buffer_modes[] = {
1070        GLX_SWAP_UNDEFINED_OML, GLX_NONE,
1071    };
1072
1073    static const uint8_t singlesample_samples[1] = {0};
1074    static const uint8_t multisample_samples[2]  = {4, 8};
1075
1076    struct intel_screen *screen = dri_screen->driverPrivate;
1077    uint8_t depth_bits[4], stencil_bits[4];
1078    __DRIconfig **configs = NULL;
1079
1080    /* Generate singlesample configs without accumulation buffer. */
1081    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1082       __DRIconfig **new_configs;
1083       int num_depth_stencil_bits = 2;
1084
1085       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
1086        * buffer that has a different number of bits per pixel than the color
1087        * buffer, gen >= 6 supports this.
1088        */
1089       depth_bits[0] = 0;
1090       stencil_bits[0] = 0;
1091
1092       if (formats[i] == MESA_FORMAT_RGB565) {
1093          depth_bits[1] = 16;
1094          stencil_bits[1] = 0;
1095          if (screen->gen >= 6) {
1096              depth_bits[2] = 24;
1097              stencil_bits[2] = 8;
1098              num_depth_stencil_bits = 3;
1099          }
1100       } else {
1101          depth_bits[1] = 24;
1102          stencil_bits[1] = 8;
1103       }
1104
1105       new_configs = driCreateConfigs(formats[i],
1106                                      depth_bits,
1107                                      stencil_bits,
1108                                      num_depth_stencil_bits,
1109                                      back_buffer_modes, 2,
1110                                      singlesample_samples, 1,
1111                                      false);
1112       configs = driConcatConfigs(configs, new_configs);
1113    }
1114
1115    /* Generate the minimum possible set of configs that include an
1116     * accumulation buffer.
1117     */
1118    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1119       __DRIconfig **new_configs;
1120
1121       if (formats[i] == MESA_FORMAT_RGB565) {
1122          depth_bits[0] = 16;
1123          stencil_bits[0] = 0;
1124       } else {
1125          depth_bits[0] = 24;
1126          stencil_bits[0] = 8;
1127       }
1128
1129       new_configs = driCreateConfigs(formats[i],
1130                                      depth_bits, stencil_bits, 1,
1131                                      back_buffer_modes, 1,
1132                                      singlesample_samples, 1,
1133                                      true);
1134       configs = driConcatConfigs(configs, new_configs);
1135    }
1136
1137    /* Generate multisample configs.
1138     *
1139     * This loop breaks early, and hence is a no-op, on gen < 6.
1140     *
1141     * Multisample configs must follow the singlesample configs in order to
1142     * work around an X server bug present in 1.12. The X server chooses to
1143     * associate the first listed RGBA888-Z24S8 config, regardless of its
1144     * sample count, with the 32-bit depth visual used for compositing.
1145     *
1146     * Only doublebuffer configs with GLX_SWAP_UNDEFINED_OML behavior are
1147     * supported.  Singlebuffer configs are not supported because no one wants
1148     * them.
1149     */
1150    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1151       if (screen->gen < 6)
1152          break;
1153
1154       __DRIconfig **new_configs;
1155       const int num_depth_stencil_bits = 2;
1156       int num_msaa_modes = 0;
1157
1158       depth_bits[0] = 0;
1159       stencil_bits[0] = 0;
1160
1161       if (formats[i] == MESA_FORMAT_RGB565) {
1162          depth_bits[1] = 16;
1163          stencil_bits[1] = 0;
1164       } else {
1165          depth_bits[1] = 24;
1166          stencil_bits[1] = 8;
1167       }
1168
1169       if (screen->gen >= 7)
1170          num_msaa_modes = 2;
1171       else if (screen->gen == 6)
1172          num_msaa_modes = 1;
1173
1174       new_configs = driCreateConfigs(formats[i],
1175                                      depth_bits,
1176                                      stencil_bits,
1177                                      num_depth_stencil_bits,
1178                                      back_buffer_modes, 1,
1179                                      multisample_samples,
1180                                      num_msaa_modes,
1181                                      false);
1182       configs = driConcatConfigs(configs, new_configs);
1183    }
1184
1185    if (configs == NULL) {
1186       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
1187               __LINE__);
1188       return NULL;
1189    }
1190
1191    return configs;
1192 }
1193
1194 static void
1195 set_max_gl_versions(struct intel_screen *screen)
1196 {
1197    __DRIscreen *psp = screen->driScrnPriv;
1198
1199    switch (screen->gen) {
1200    case 7:
1201       psp->max_gl_core_version = 31;
1202       psp->max_gl_compat_version = 30;
1203       psp->max_gl_es1_version = 11;
1204       psp->max_gl_es2_version = 30;
1205       break;
1206    case 6:
1207       psp->max_gl_core_version = 31;
1208       psp->max_gl_compat_version = 30;
1209       psp->max_gl_es1_version = 11;
1210       psp->max_gl_es2_version = 30;
1211       break;
1212    case 5:
1213    case 4:
1214       psp->max_gl_core_version = 0;
1215       psp->max_gl_compat_version = 21;
1216       psp->max_gl_es1_version = 11;
1217       psp->max_gl_es2_version = 20;
1218       break;
1219    default:
1220       assert(!"unrecognized intel_screen::gen");
1221       break;
1222    }
1223 }
1224
1225 /**
1226  * This is the driver specific part of the createNewScreen entry point.
1227  * Called when using DRI2.
1228  *
1229  * \return the struct gl_config supported by this driver
1230  */
1231 static const
1232 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
1233 {
1234    struct intel_screen *intelScreen;
1235
1236    if (psp->dri2.loader->base.version <= 2 ||
1237        psp->dri2.loader->getBuffersWithFormat == NULL) {
1238       fprintf(stderr,
1239               "\nERROR!  DRI2 loader with getBuffersWithFormat() "
1240               "support required\n");
1241       return false;
1242    }
1243
1244    /* Allocate the private area */
1245    intelScreen = calloc(1, sizeof *intelScreen);
1246    if (!intelScreen) {
1247       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
1248       return false;
1249    }
1250    /* parse information in __driConfigOptions */
1251    driParseOptionInfo(&intelScreen->optionCache, __driConfigOptions);
1252
1253    intelScreen->driScrnPriv = psp;
1254    psp->driverPrivate = (void *) intelScreen;
1255
1256    if (!intel_init_bufmgr(intelScreen))
1257        return false;
1258
1259    intelScreen->deviceID = drm_intel_bufmgr_gem_get_devid(intelScreen->bufmgr);
1260
1261    if (IS_GEN7(intelScreen->deviceID)) {
1262       intelScreen->gen = 7;
1263    } else if (IS_GEN6(intelScreen->deviceID)) {
1264       intelScreen->gen = 6;
1265    } else if (IS_GEN5(intelScreen->deviceID)) {
1266       intelScreen->gen = 5;
1267    } else {
1268       intelScreen->gen = 4;
1269    }
1270
1271    intelScreen->hw_has_separate_stencil = intelScreen->gen >= 6;
1272    intelScreen->hw_must_use_separate_stencil = intelScreen->gen >= 7;
1273
1274    int has_llc = 0;
1275    bool success = intel_get_param(intelScreen->driScrnPriv, I915_PARAM_HAS_LLC,
1276                                   &has_llc);
1277    if (success && has_llc)
1278       intelScreen->hw_has_llc = true;
1279    else if (!success && intelScreen->gen >= 6)
1280       intelScreen->hw_has_llc = true;
1281
1282    intel_override_separate_stencil(intelScreen);
1283
1284    intelScreen->hw_has_swizzling = intel_detect_swizzling(intelScreen);
1285
1286    set_max_gl_versions(intelScreen);
1287
1288    psp->extensions = intelScreenExtensions;
1289
1290    return (const __DRIconfig**) intel_screen_make_configs(psp);
1291 }
1292
1293 struct intel_buffer {
1294    __DRIbuffer base;
1295    struct intel_region *region;
1296 };
1297
1298 static __DRIbuffer *
1299 intelAllocateBuffer(__DRIscreen *screen,
1300                     unsigned attachment, unsigned format,
1301                     int width, int height)
1302 {
1303    struct intel_buffer *intelBuffer;
1304    struct intel_screen *intelScreen = screen->driverPrivate;
1305
1306    assert(attachment == __DRI_BUFFER_FRONT_LEFT ||
1307           attachment == __DRI_BUFFER_BACK_LEFT);
1308
1309    intelBuffer = calloc(1, sizeof *intelBuffer);
1310    if (intelBuffer == NULL)
1311       return NULL;
1312
1313    /* The front and back buffers are color buffers, which are X tiled. */
1314    intelBuffer->region = intel_region_alloc(intelScreen,
1315                                             I915_TILING_X,
1316                                             format / 8,
1317                                             width,
1318                                             height,
1319                                             true);
1320
1321    if (intelBuffer->region == NULL) {
1322            free(intelBuffer);
1323            return NULL;
1324    }
1325
1326    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
1327
1328    intelBuffer->base.attachment = attachment;
1329    intelBuffer->base.cpp = intelBuffer->region->cpp;
1330    intelBuffer->base.pitch = intelBuffer->region->pitch;
1331
1332    return &intelBuffer->base;
1333 }
1334
1335 static void
1336 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
1337 {
1338    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
1339
1340    intel_region_release(&intelBuffer->region);
1341    free(intelBuffer);
1342 }
1343
1344
1345 const struct __DriverAPIRec driDriverAPI = {
1346    .InitScreen           = intelInitScreen2,
1347    .DestroyScreen        = intelDestroyScreen,
1348    .CreateContext        = brwCreateContext,
1349    .DestroyContext       = intelDestroyContext,
1350    .CreateBuffer         = intelCreateBuffer,
1351    .DestroyBuffer        = intelDestroyBuffer,
1352    .MakeCurrent          = intelMakeCurrent,
1353    .UnbindContext        = intelUnbindContext,
1354    .AllocateBuffer       = intelAllocateBuffer,
1355    .ReleaseBuffer        = intelReleaseBuffer
1356 };
1357
1358 /* This is the table of extensions that the loader will dlsym() for. */
1359 PUBLIC const __DRIextension *__driDriverExtensions[] = {
1360     &driCoreExtension.base,
1361     &driDRI2Extension.base,
1362     NULL
1363 };