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

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <errno.h>
  29 #include <time.h>
  30 #include <unistd.h>
  31 #include "main/glheader.h"
  32 #include "main/context.h"
  33 #include "main/framebuffer.h"
  34 #include "main/renderbuffer.h"
  35 #include "main/texobj.h"
  36 #include "main/hash.h"
  37 #include "main/fbobject.h"
  38 #include "main/version.h"
  39 #include "swrast/s_renderbuffer.h"
  40 #include "util/ralloc.h"
  41 #include "brw_shader.h"
  42
  43 #include "utils.h"
  44 #include "xmlpool.h"
  45
  46 static const __DRIconfigOptionsExtension brw_config_options = {
  47    .base = { __DRI_CONFIG_OPTIONS, 1 },
  48    .xml =
  49 DRI_CONF_BEGIN
  50    DRI_CONF_SECTION_PERFORMANCE
  51       DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
  52       /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
  53        * DRI_CONF_BO_REUSE_ALL
  54        */
  55       DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
  56          DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
  57             DRI_CONF_ENUM(0, "Disable buffer object reuse")
  58             DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
  59          DRI_CONF_DESC_END
  60       DRI_CONF_OPT_END
  61
  62       DRI_CONF_OPT_BEGIN_B(hiz, "true")
  63          DRI_CONF_DESC(en, "Enable Hierarchical Z on gen6+")
  64       DRI_CONF_OPT_END
  65    DRI_CONF_SECTION_END
  66
  67    DRI_CONF_SECTION_QUALITY
  68       DRI_CONF_FORCE_S3TC_ENABLE("false")
  69
  70       DRI_CONF_OPT_BEGIN(clamp_max_samples, int, -1)
  71               DRI_CONF_DESC(en, "Clamp the value of GL_MAX_SAMPLES to the "
  72                             "given integer. If negative, then do not clamp.")
  73       DRI_CONF_OPT_END
  74    DRI_CONF_SECTION_END
  75
  76    DRI_CONF_SECTION_DEBUG
  77       DRI_CONF_NO_RAST("false")
  78       DRI_CONF_ALWAYS_FLUSH_BATCH("false")
  79       DRI_CONF_ALWAYS_FLUSH_CACHE("false")
  80       DRI_CONF_DISABLE_THROTTLING("false")
  81       DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN("false")
  82       DRI_CONF_DISABLE_GLSL_LINE_CONTINUATIONS("false")
  83       DRI_CONF_DISABLE_BLEND_FUNC_EXTENDED("false")
  84       DRI_CONF_ALLOW_GLSL_EXTENSION_DIRECTIVE_MIDSHADER("false")
  85
  86       DRI_CONF_OPT_BEGIN_B(shader_precompile, "true")
  87          DRI_CONF_DESC(en, "Perform code generation at shader link time.")
  88       DRI_CONF_OPT_END
  89    DRI_CONF_SECTION_END
  90 DRI_CONF_END
  91 };
  92
  93 #include "intel_batchbuffer.h"
  94 #include "intel_buffers.h"
  95 #include "intel_bufmgr.h"
  96 #include "intel_fbo.h"
  97 #include "intel_mipmap_tree.h"
  98 #include "intel_screen.h"
  99 #include "intel_tex.h"
 100 #include "intel_image.h"
 101
 102 #include "brw_context.h"
 103
 104 #include "i915_drm.h"
 105
 106 /**
 107  * For debugging purposes, this returns a time in seconds.
 108  */
 109 double
 110 get_time(void)
 111 {
 112    struct timespec tp;
 113
 114    clock_gettime(CLOCK_MONOTONIC, &tp);
 115
 116    return tp.tv_sec + tp.tv_nsec / 1000000000.0;
 117 }
 118
 119 void
 120 aub_dump_bmp(struct gl_context *ctx)
 121 {
 122    struct gl_framebuffer *fb = ctx->DrawBuffer;
 123
 124    for (int i = 0; i < fb->_NumColorDrawBuffers; i++) {
 125       struct intel_renderbuffer *irb =
 126          intel_renderbuffer(fb->_ColorDrawBuffers[i]);
 127
 128       if (irb && irb->mt) {
 129          enum aub_dump_bmp_format format;
 130
 131          switch (irb->Base.Base.Format) {
 132          case MESA_FORMAT_B8G8R8A8_UNORM:
 133          case MESA_FORMAT_B8G8R8X8_UNORM:
 134             format = AUB_DUMP_BMP_FORMAT_ARGB_8888;
 135             break;
 136          default:
 137             continue;
 138          }
 139
 140          drm_intel_gem_bo_aub_dump_bmp(irb->mt->bo,
 141                                        irb->draw_x,
 142                                        irb->draw_y,
 143                                        irb->Base.Base.Width,
 144                                        irb->Base.Base.Height,
 145                                        format,
 146                                        irb->mt->pitch,
 147                                        0);
 148       }
 149    }
 150 }
 151
 152 static const __DRItexBufferExtension intelTexBufferExtension = {
 153    .base = { __DRI_TEX_BUFFER, 3 },
 154
 155    .setTexBuffer        = intelSetTexBuffer,
 156    .setTexBuffer2       = intelSetTexBuffer2,
 157    .releaseTexBuffer    = NULL,
 158 };
 159
 160 static void
 161 intel_dri2_flush_with_flags(__DRIcontext *cPriv,
 162                             __DRIdrawable *dPriv,
 163                             unsigned flags,
 164                             enum __DRI2throttleReason reason)
 165 {
 166    struct brw_context *brw = cPriv->driverPrivate;
 167
 168    if (!brw)
 169       return;
 170
 171    struct gl_context *ctx = &brw->ctx;
 172
 173    FLUSH_VERTICES(ctx, 0);
 174
 175    if (flags & __DRI2_FLUSH_DRAWABLE)
 176       intel_resolve_for_dri2_flush(brw, dPriv);
 177
 178    if (reason == __DRI2_THROTTLE_SWAPBUFFER)
 179       brw->need_swap_throttle = true;
 180    if (reason == __DRI2_THROTTLE_FLUSHFRONT)
 181       brw->need_flush_throttle = true;
 182
 183    intel_batchbuffer_flush(brw);
 184
 185    if (INTEL_DEBUG & DEBUG_AUB) {
 186       aub_dump_bmp(ctx);
 187    }
 188 }
 189
 190 /**
 191  * Provides compatibility with loaders that only support the older (version
 192  * 1-3) flush interface.
 193  *
 194  * That includes libGL up to Mesa 9.0, and the X Server at least up to 1.13.
 195  */
 196 static void
 197 intel_dri2_flush(__DRIdrawable *drawable)
 198 {
 199    intel_dri2_flush_with_flags(drawable->driContextPriv, drawable,
 200                                __DRI2_FLUSH_DRAWABLE,
 201                                __DRI2_THROTTLE_SWAPBUFFER);
 202 }
 203
 204 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 205     .base = { __DRI2_FLUSH, 4 },
 206
 207     .flush              = intel_dri2_flush,
 208     .invalidate         = dri2InvalidateDrawable,
 209     .flush_with_flags   = intel_dri2_flush_with_flags,
 210 };
 211
 212 static struct intel_image_format intel_image_formats[] = {
 213    { __DRI_IMAGE_FOURCC_ARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
 214      { { 0, 0, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } },
 215
 216    { __DRI_IMAGE_FOURCC_ABGR8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
 217      { { 0, 0, 0, __DRI_IMAGE_FORMAT_ABGR8888, 4 } } },
 218
 219    { __DRI_IMAGE_FOURCC_SARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
 220      { { 0, 0, 0, __DRI_IMAGE_FORMAT_SARGB8, 4 } } },
 221
 222    { __DRI_IMAGE_FOURCC_XRGB8888, __DRI_IMAGE_COMPONENTS_RGB, 1,
 223      { { 0, 0, 0, __DRI_IMAGE_FORMAT_XRGB8888, 4 }, } },
 224
 225    { __DRI_IMAGE_FOURCC_XBGR8888, __DRI_IMAGE_COMPONENTS_RGB, 1,
 226      { { 0, 0, 0, __DRI_IMAGE_FORMAT_XBGR8888, 4 }, } },
 227
 228    { __DRI_IMAGE_FOURCC_RGB565, __DRI_IMAGE_COMPONENTS_RGB, 1,
 229      { { 0, 0, 0, __DRI_IMAGE_FORMAT_RGB565, 2 } } },
 230
 231    { __DRI_IMAGE_FOURCC_YUV410, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 232      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 233        { 1, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 },
 234        { 2, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 } } },
 235
 236    { __DRI_IMAGE_FOURCC_YUV411, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 237      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 238        { 1, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 239        { 2, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 240
 241    { __DRI_IMAGE_FOURCC_YUV420, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 242      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 243        { 1, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 },
 244        { 2, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 } } },
 245
 246    { __DRI_IMAGE_FOURCC_YUV422, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 247      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 248        { 1, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 249        { 2, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 250
 251    { __DRI_IMAGE_FOURCC_YUV444, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 252      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 253        { 1, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 254        { 2, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 255
 256    { __DRI_IMAGE_FOURCC_NV12, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 257      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 258        { 1, 1, 1, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 259
 260    { __DRI_IMAGE_FOURCC_NV16, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 261      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 262        { 1, 1, 0, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 263
 264    /* For YUYV buffers, we set up two overlapping DRI images and treat
 265     * them as planar buffers in the compositors.  Plane 0 is GR88 and
 266     * samples YU or YV pairs and places Y into the R component, while
 267     * plane 1 is ARGB and samples YUYV clusters and places pairs and
 268     * places U into the G component and V into A.  This lets the
 269     * texture sampler interpolate the Y components correctly when
 270     * sampling from plane 0, and interpolate U and V correctly when
 271     * sampling from plane 1. */
 272    { __DRI_IMAGE_FOURCC_YUYV, __DRI_IMAGE_COMPONENTS_Y_XUXV, 2,
 273      { { 0, 0, 0, __DRI_IMAGE_FORMAT_GR88, 2 },
 274        { 0, 1, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } }
 275 };
 276
 277 static void
 278 intel_image_warn_if_unaligned(__DRIimage *image, const char *func)
 279 {
 280    uint32_t tiling, swizzle;
 281    drm_intel_bo_get_tiling(image->bo, &tiling, &swizzle);
 282
 283    if (tiling != I915_TILING_NONE && (image->offset & 0xfff)) {
 284       _mesa_warning(NULL, "%s: offset 0x%08x not on tile boundary",
 285                     func, image->offset);
 286    }
 287 }
 288
 289 static struct intel_image_format *
 290 intel_image_format_lookup(int fourcc)
 291 {
 292    struct intel_image_format *f = NULL;
 293
 294    for (unsigned i = 0; i < ARRAY_SIZE(intel_image_formats); i++) {
 295       if (intel_image_formats[i].fourcc == fourcc) {
 296          f = &intel_image_formats[i];
 297          break;
 298       }
 299    }
 300
 301    return f;
 302 }
 303
 304 static boolean intel_lookup_fourcc(int dri_format, int *fourcc)
 305 {
 306    for (unsigned i = 0; i < ARRAY_SIZE(intel_image_formats); i++) {
 307       if (intel_image_formats[i].planes[0].dri_format == dri_format) {
 308          *fourcc = intel_image_formats[i].fourcc;
 309          return true;
 310       }
 311    }
 312    return false;
 313 }
 314
 315 static __DRIimage *
 316 intel_allocate_image(int dri_format, void *loaderPrivate)
 317 {
 318     __DRIimage *image;
 319
 320     image = calloc(1, sizeof *image);
 321     if (image == NULL)
 322         return NULL;
 323
 324     image->dri_format = dri_format;
 325     image->offset = 0;
 326
 327     image->format = driImageFormatToGLFormat(dri_format);
 328     if (dri_format != __DRI_IMAGE_FORMAT_NONE &&
 329         image->format == MESA_FORMAT_NONE) {
 330        free(image);
 331        return NULL;
 332     }
 333
 334     image->internal_format = _mesa_get_format_base_format(image->format);
 335     image->data = loaderPrivate;
 336
 337     return image;
 338 }
 339
 340 /**
 341  * Sets up a DRIImage structure to point to a slice out of a miptree.
 342  */
 343 static void
 344 intel_setup_image_from_mipmap_tree(struct brw_context *brw, __DRIimage *image,
 345                                    struct intel_mipmap_tree *mt, GLuint level,
 346                                    GLuint zoffset)
 347 {
 348    intel_miptree_make_shareable(brw, mt);
 349
 350    intel_miptree_check_level_layer(mt, level, zoffset);
 351
 352    image->width = minify(mt->physical_width0, level - mt->first_level);
 353    image->height = minify(mt->physical_height0, level - mt->first_level);
 354    image->pitch = mt->pitch;
 355
 356    image->offset = intel_miptree_get_tile_offsets(mt, level, zoffset,
 357                                                   &image->tile_x,
 358                                                   &image->tile_y);
 359
 360    drm_intel_bo_unreference(image->bo);
 361    image->bo = mt->bo;
 362    drm_intel_bo_reference(mt->bo);
 363 }
 364
 365 static __DRIimage *
 366 intel_create_image_from_name(__DRIscreen *screen,
 367                              int width, int height, int format,
 368                              int name, int pitch, void *loaderPrivate)
 369 {
 370     struct intel_screen *intelScreen = screen->driverPrivate;
 371     __DRIimage *image;
 372     int cpp;
 373
 374     image = intel_allocate_image(format, loaderPrivate);
 375     if (image == NULL)
 376        return NULL;
 377
 378     if (image->format == MESA_FORMAT_NONE)
 379        cpp = 1;
 380     else
 381        cpp = _mesa_get_format_bytes(image->format);
 382
 383     image->width = width;
 384     image->height = height;
 385     image->pitch = pitch * cpp;
 386     image->bo = drm_intel_bo_gem_create_from_name(intelScreen->bufmgr, "image",
 387                                                   name);
 388     if (!image->bo) {
 389        free(image);
 390        return NULL;
 391     }
 392
 393     return image;
 394 }
 395
 396 static __DRIimage *
 397 intel_create_image_from_renderbuffer(__DRIcontext *context,
 398                                      int renderbuffer, void *loaderPrivate)
 399 {
 400    __DRIimage *image;
 401    struct brw_context *brw = context->driverPrivate;
 402    struct gl_context *ctx = &brw->ctx;
 403    struct gl_renderbuffer *rb;
 404    struct intel_renderbuffer *irb;
 405
 406    rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 407    if (!rb) {
 408       _mesa_error(ctx, GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 409       return NULL;
 410    }
 411
 412    irb = intel_renderbuffer(rb);
 413    intel_miptree_make_shareable(brw, irb->mt);
 414    image = calloc(1, sizeof *image);
 415    if (image == NULL)
 416       return NULL;
 417
 418    image->internal_format = rb->InternalFormat;
 419    image->format = rb->Format;
 420    image->offset = 0;
 421    image->data = loaderPrivate;
 422    drm_intel_bo_unreference(image->bo);
 423    image->bo = irb->mt->bo;
 424    drm_intel_bo_reference(irb->mt->bo);
 425    image->width = rb->Width;
 426    image->height = rb->Height;
 427    image->pitch = irb->mt->pitch;
 428    image->dri_format = driGLFormatToImageFormat(image->format);
 429    image->has_depthstencil = irb->mt->stencil_mt? true : false;
 430
 431    rb->NeedsFinishRenderTexture = true;
 432    return image;
 433 }
 434
 435 static __DRIimage *
 436 intel_create_image_from_texture(__DRIcontext *context, int target,
 437                                 unsigned texture, int zoffset,
 438                                 int level,
 439                                 unsigned *error,
 440                                 void *loaderPrivate)
 441 {
 442    __DRIimage *image;
 443    struct brw_context *brw = context->driverPrivate;
 444    struct gl_texture_object *obj;
 445    struct intel_texture_object *iobj;
 446    GLuint face = 0;
 447
 448    obj = _mesa_lookup_texture(&brw->ctx, texture);
 449    if (!obj || obj->Target != target) {
 450       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 451       return NULL;
 452    }
 453
 454    if (target == GL_TEXTURE_CUBE_MAP)
 455       face = zoffset;
 456
 457    _mesa_test_texobj_completeness(&brw->ctx, obj);
 458    iobj = intel_texture_object(obj);
 459    if (!obj->_BaseComplete || (level > 0 && !obj->_MipmapComplete)) {
 460       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 461       return NULL;
 462    }
 463
 464    if (level < obj->BaseLevel || level > obj->_MaxLevel) {
 465       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 466       return NULL;
 467    }
 468
 469    if (target == GL_TEXTURE_3D && obj->Image[face][level]->Depth < zoffset) {
 470       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 471       return NULL;
 472    }
 473    image = calloc(1, sizeof *image);
 474    if (image == NULL) {
 475       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
 476       return NULL;
 477    }
 478
 479    image->internal_format = obj->Image[face][level]->InternalFormat;
 480    image->format = obj->Image[face][level]->TexFormat;
 481    image->data = loaderPrivate;
 482    intel_setup_image_from_mipmap_tree(brw, image, iobj->mt, level, zoffset);
 483    image->dri_format = driGLFormatToImageFormat(image->format);
 484    image->has_depthstencil = iobj->mt->stencil_mt? true : false;
 485    if (image->dri_format == MESA_FORMAT_NONE) {
 486       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 487       free(image);
 488       return NULL;
 489    }
 490
 491    *error = __DRI_IMAGE_ERROR_SUCCESS;
 492    return image;
 493 }
 494
 495 static void
 496 intel_destroy_image(__DRIimage *image)
 497 {
 498    drm_intel_bo_unreference(image->bo);
 499    free(image);
 500 }
 501
 502 static __DRIimage *
 503 intel_create_image(__DRIscreen *screen,
 504                    int width, int height, int format,
 505                    unsigned int use,
 506                    void *loaderPrivate)
 507 {
 508    __DRIimage *image;
 509    struct intel_screen *intelScreen = screen->driverPrivate;
 510    uint32_t tiling;
 511    int cpp;
 512    unsigned long pitch;
 513
 514    tiling = I915_TILING_X;
 515    if (use & __DRI_IMAGE_USE_CURSOR) {
 516       if (width != 64 || height != 64)
 517          return NULL;
 518       tiling = I915_TILING_NONE;
 519    }
 520
 521    if (use & __DRI_IMAGE_USE_LINEAR)
 522       tiling = I915_TILING_NONE;
 523
 524    image = intel_allocate_image(format, loaderPrivate);
 525    if (image == NULL)
 526       return NULL;
 527
 528
 529    cpp = _mesa_get_format_bytes(image->format);
 530    image->bo = drm_intel_bo_alloc_tiled(intelScreen->bufmgr, "image",
 531                                         width, height, cpp, &tiling,
 532                                         &pitch, 0);
 533    if (image->bo == NULL) {
 534       free(image);
 535       return NULL;
 536    }
 537    image->width = width;
 538    image->height = height;
 539    image->pitch = pitch;
 540
 541    return image;
 542 }
 543
 544 static GLboolean
 545 intel_query_image(__DRIimage *image, int attrib, int *value)
 546 {
 547    switch (attrib) {
 548    case __DRI_IMAGE_ATTRIB_STRIDE:
 549       *value = image->pitch;
 550       return true;
 551    case __DRI_IMAGE_ATTRIB_HANDLE:
 552       *value = image->bo->handle;
 553       return true;
 554    case __DRI_IMAGE_ATTRIB_NAME:
 555       return !drm_intel_bo_flink(image->bo, (uint32_t *) value);
 556    case __DRI_IMAGE_ATTRIB_FORMAT:
 557       *value = image->dri_format;
 558       return true;
 559    case __DRI_IMAGE_ATTRIB_WIDTH:
 560       *value = image->width;
 561       return true;
 562    case __DRI_IMAGE_ATTRIB_HEIGHT:
 563       *value = image->height;
 564       return true;
 565    case __DRI_IMAGE_ATTRIB_COMPONENTS:
 566       if (image->planar_format == NULL)
 567          return false;
 568       *value = image->planar_format->components;
 569       return true;
 570    case __DRI_IMAGE_ATTRIB_FD:
 571       if (drm_intel_bo_gem_export_to_prime(image->bo, value) == 0)
 572          return true;
 573       return false;
 574    case __DRI_IMAGE_ATTRIB_FOURCC:
 575       if (intel_lookup_fourcc(image->dri_format, value))
 576          return true;
 577       return false;
 578    case __DRI_IMAGE_ATTRIB_NUM_PLANES:
 579       *value = 1;
 580       return true;
 581
 582   default:
 583       return false;
 584    }
 585 }
 586
 587 static __DRIimage *
 588 intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
 589 {
 590    __DRIimage *image;
 591
 592    image = calloc(1, sizeof *image);
 593    if (image == NULL)
 594       return NULL;
 595
 596    drm_intel_bo_reference(orig_image->bo);
 597    image->bo              = orig_image->bo;
 598    image->internal_format = orig_image->internal_format;
 599    image->planar_format   = orig_image->planar_format;
 600    image->dri_format      = orig_image->dri_format;
 601    image->format          = orig_image->format;
 602    image->offset          = orig_image->offset;
 603    image->width           = orig_image->width;
 604    image->height          = orig_image->height;
 605    image->pitch           = orig_image->pitch;
 606    image->tile_x          = orig_image->tile_x;
 607    image->tile_y          = orig_image->tile_y;
 608    image->has_depthstencil = orig_image->has_depthstencil;
 609    image->data            = loaderPrivate;
 610
 611    memcpy(image->strides, orig_image->strides, sizeof(image->strides));
 612    memcpy(image->offsets, orig_image->offsets, sizeof(image->offsets));
 613
 614    return image;
 615 }
 616
 617 static GLboolean
 618 intel_validate_usage(__DRIimage *image, unsigned int use)
 619 {
 620    if (use & __DRI_IMAGE_USE_CURSOR) {
 621       if (image->width != 64 || image->height != 64)
 622          return GL_FALSE;
 623    }
 624
 625    return GL_TRUE;
 626 }
 627
 628 static __DRIimage *
 629 intel_create_image_from_names(__DRIscreen *screen,
 630                               int width, int height, int fourcc,
 631                               int *names, int num_names,
 632                               int *strides, int *offsets,
 633                               void *loaderPrivate)
 634 {
 635     struct intel_image_format *f = NULL;
 636     __DRIimage *image;
 637     int i, index;
 638
 639     if (screen == NULL || names == NULL || num_names != 1)
 640         return NULL;
 641
 642     f = intel_image_format_lookup(fourcc);
 643     if (f == NULL)
 644         return NULL;
 645
 646     image = intel_create_image_from_name(screen, width, height,
 647                                          __DRI_IMAGE_FORMAT_NONE,
 648                                          names[0], strides[0],
 649                                          loaderPrivate);
 650
 651    if (image == NULL)
 652       return NULL;
 653
 654     image->planar_format = f;
 655     for (i = 0; i < f->nplanes; i++) {
 656         index = f->planes[i].buffer_index;
 657         image->offsets[index] = offsets[index];
 658         image->strides[index] = strides[index];
 659     }
 660
 661     return image;
 662 }
 663
 664 static __DRIimage *
 665 intel_create_image_from_fds(__DRIscreen *screen,
 666                             int width, int height, int fourcc,
 667                             int *fds, int num_fds, int *strides, int *offsets,
 668                             void *loaderPrivate)
 669 {
 670    struct intel_screen *intelScreen = screen->driverPrivate;
 671    struct intel_image_format *f;
 672    __DRIimage *image;
 673    int i, index;
 674
 675    if (fds == NULL || num_fds != 1)
 676       return NULL;
 677
 678    f = intel_image_format_lookup(fourcc);
 679    if (f == NULL)
 680       return NULL;
 681
 682    if (f->nplanes == 1)
 683       image = intel_allocate_image(f->planes[0].dri_format, loaderPrivate);
 684    else
 685       image = intel_allocate_image(__DRI_IMAGE_FORMAT_NONE, loaderPrivate);
 686
 687    if (image == NULL)
 688       return NULL;
 689
 690    image->bo = drm_intel_bo_gem_create_from_prime(intelScreen->bufmgr,
 691                                                   fds[0],
 692                                                   height * strides[0]);
 693    if (image->bo == NULL) {
 694       free(image);
 695       return NULL;
 696    }
 697    image->width = width;
 698    image->height = height;
 699    image->pitch = strides[0];
 700
 701    image->planar_format = f;
 702    for (i = 0; i < f->nplanes; i++) {
 703       index = f->planes[i].buffer_index;
 704       image->offsets[index] = offsets[index];
 705       image->strides[index] = strides[index];
 706    }
 707
 708    if (f->nplanes == 1) {
 709       image->offset = image->offsets[0];
 710       intel_image_warn_if_unaligned(image, __func__);
 711    }
 712
 713    return image;
 714 }
 715
 716 static __DRIimage *
 717 intel_create_image_from_dma_bufs(__DRIscreen *screen,
 718                                  int width, int height, int fourcc,
 719                                  int *fds, int num_fds,
 720                                  int *strides, int *offsets,
 721                                  enum __DRIYUVColorSpace yuv_color_space,
 722                                  enum __DRISampleRange sample_range,
 723                                  enum __DRIChromaSiting horizontal_siting,
 724                                  enum __DRIChromaSiting vertical_siting,
 725                                  unsigned *error,
 726                                  void *loaderPrivate)
 727 {
 728    __DRIimage *image;
 729    struct intel_image_format *f = intel_image_format_lookup(fourcc);
 730
 731    /* For now only packed formats that have native sampling are supported. */
 732    if (!f || f->nplanes != 1) {
 733       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 734       return NULL;
 735    }
 736
 737    image = intel_create_image_from_fds(screen, width, height, fourcc, fds,
 738                                        num_fds, strides, offsets,
 739                                        loaderPrivate);
 740
 741    /*
 742     * Invalid parameters and any inconsistencies between are assumed to be
 743     * checked by the caller. Therefore besides unsupported formats one can fail
 744     * only in allocation.
 745     */
 746    if (!image) {
 747       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
 748       return NULL;
 749    }
 750
 751    image->dma_buf_imported = true;
 752    image->yuv_color_space = yuv_color_space;
 753    image->sample_range = sample_range;
 754    image->horizontal_siting = horizontal_siting;
 755    image->vertical_siting = vertical_siting;
 756
 757    *error = __DRI_IMAGE_ERROR_SUCCESS;
 758    return image;
 759 }
 760
 761 static __DRIimage *
 762 intel_from_planar(__DRIimage *parent, int plane, void *loaderPrivate)
 763 {
 764     int width, height, offset, stride, dri_format, index;
 765     struct intel_image_format *f;
 766     __DRIimage *image;
 767
 768     if (parent == NULL || parent->planar_format == NULL)
 769         return NULL;
 770
 771     f = parent->planar_format;
 772
 773     if (plane >= f->nplanes)
 774         return NULL;
 775
 776     width = parent->width >> f->planes[plane].width_shift;
 777     height = parent->height >> f->planes[plane].height_shift;
 778     dri_format = f->planes[plane].dri_format;
 779     index = f->planes[plane].buffer_index;
 780     offset = parent->offsets[index];
 781     stride = parent->strides[index];
 782
 783     image = intel_allocate_image(dri_format, loaderPrivate);
 784     if (image == NULL)
 785        return NULL;
 786
 787     if (offset + height * stride > parent->bo->size) {
 788        _mesa_warning(NULL, "intel_create_sub_image: subimage out of bounds");
 789        free(image);
 790        return NULL;
 791     }
 792
 793     image->bo = parent->bo;
 794     drm_intel_bo_reference(parent->bo);
 795
 796     image->width = width;
 797     image->height = height;
 798     image->pitch = stride;
 799     image->offset = offset;
 800
 801     intel_image_warn_if_unaligned(image, __func__);
 802
 803     return image;
 804 }
 805
 806 static const __DRIimageExtension intelImageExtension = {
 807     .base = { __DRI_IMAGE, 11 },
 808
 809     .createImageFromName                = intel_create_image_from_name,
 810     .createImageFromRenderbuffer        = intel_create_image_from_renderbuffer,
 811     .destroyImage                       = intel_destroy_image,
 812     .createImage                        = intel_create_image,
 813     .queryImage                         = intel_query_image,
 814     .dupImage                           = intel_dup_image,
 815     .validateUsage                      = intel_validate_usage,
 816     .createImageFromNames               = intel_create_image_from_names,
 817     .fromPlanar                         = intel_from_planar,
 818     .createImageFromTexture             = intel_create_image_from_texture,
 819     .createImageFromFds                 = intel_create_image_from_fds,
 820     .createImageFromDmaBufs             = intel_create_image_from_dma_bufs,
 821     .blitImage                          = NULL,
 822     .getCapabilities                    = NULL
 823 };
 824
 825 static int
 826 brw_query_renderer_integer(__DRIscreen *psp, int param, unsigned int *value)
 827 {
 828    const struct intel_screen *const intelScreen =
 829       (struct intel_screen *) psp->driverPrivate;
 830
 831    switch (param) {
 832    case __DRI2_RENDERER_VENDOR_ID:
 833       value[0] = 0x8086;
 834       return 0;
 835    case __DRI2_RENDERER_DEVICE_ID:
 836       value[0] = intelScreen->deviceID;
 837       return 0;
 838    case __DRI2_RENDERER_ACCELERATED:
 839       value[0] = 1;
 840       return 0;
 841    case __DRI2_RENDERER_VIDEO_MEMORY: {
 842       /* Once a batch uses more than 75% of the maximum mappable size, we
 843        * assume that there's some fragmentation, and we start doing extra
 844        * flushing, etc.  That's the big cliff apps will care about.
 845        */
 846       size_t aper_size;
 847       size_t mappable_size;
 848
 849       drm_intel_get_aperture_sizes(psp->fd, &mappable_size, &aper_size);
 850
 851       const unsigned gpu_mappable_megabytes =
 852          (aper_size / (1024 * 1024)) * 3 / 4;
 853
 854       const long system_memory_pages = sysconf(_SC_PHYS_PAGES);
 855       const long system_page_size = sysconf(_SC_PAGE_SIZE);
 856
 857       if (system_memory_pages <= 0 || system_page_size <= 0)
 858          return -1;
 859
 860       const uint64_t system_memory_bytes = (uint64_t) system_memory_pages
 861          * (uint64_t) system_page_size;
 862
 863       const unsigned system_memory_megabytes =
 864          (unsigned) (system_memory_bytes / (1024 * 1024));
 865
 866       value[0] = MIN2(system_memory_megabytes, gpu_mappable_megabytes);
 867       return 0;
 868    }
 869    case __DRI2_RENDERER_UNIFIED_MEMORY_ARCHITECTURE:
 870       value[0] = 1;
 871       return 0;
 872    default:
 873       return driQueryRendererIntegerCommon(psp, param, value);
 874    }
 875
 876    return -1;
 877 }
 878
 879 static int
 880 brw_query_renderer_string(__DRIscreen *psp, int param, const char **value)
 881 {
 882    const struct intel_screen *intelScreen =
 883       (struct intel_screen *) psp->driverPrivate;
 884
 885    switch (param) {
 886    case __DRI2_RENDERER_VENDOR_ID:
 887       value[0] = brw_vendor_string;
 888       return 0;
 889    case __DRI2_RENDERER_DEVICE_ID:
 890       value[0] = brw_get_renderer_string(intelScreen->deviceID);
 891       return 0;
 892    default:
 893       break;
 894    }
 895
 896    return -1;
 897 }
 898
 899 static const __DRI2rendererQueryExtension intelRendererQueryExtension = {
 900    .base = { __DRI2_RENDERER_QUERY, 1 },
 901
 902    .queryInteger = brw_query_renderer_integer,
 903    .queryString = brw_query_renderer_string
 904 };
 905
 906 static const __DRIrobustnessExtension dri2Robustness = {
 907    .base = { __DRI2_ROBUSTNESS, 1 }
 908 };
 909
 910 static const __DRIextension *intelScreenExtensions[] = {
 911     &intelTexBufferExtension.base,
 912     &intelFlushExtension.base,
 913     &intelImageExtension.base,
 914     &intelRendererQueryExtension.base,
 915     &dri2ConfigQueryExtension.base,
 916     NULL
 917 };
 918
 919 static const __DRIextension *intelRobustScreenExtensions[] = {
 920     &intelTexBufferExtension.base,
 921     &intelFlushExtension.base,
 922     &intelImageExtension.base,
 923     &intelRendererQueryExtension.base,
 924     &dri2ConfigQueryExtension.base,
 925     &dri2Robustness.base,
 926     NULL
 927 };
 928
 929 static bool
 930 intel_get_param(__DRIscreen *psp, int param, int *value)
 931 {
 932    int ret;
 933    struct drm_i915_getparam gp;
 934
 935    memset(&gp, 0, sizeof(gp));
 936    gp.param = param;
 937    gp.value = value;
 938
 939    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 940    if (ret) {
 941       if (ret != -EINVAL)
 942          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 943       return false;
 944    }
 945
 946    return true;
 947 }
 948
 949 static bool
 950 intel_get_boolean(__DRIscreen *psp, int param)
 951 {
 952    int value = 0;
 953    return intel_get_param(psp, param, &value) && value;
 954 }
 955
 956 static void
 957 intelDestroyScreen(__DRIscreen * sPriv)
 958 {
 959    struct intel_screen *intelScreen = sPriv->driverPrivate;
 960
 961    dri_bufmgr_destroy(intelScreen->bufmgr);
 962    driDestroyOptionInfo(&intelScreen->optionCache);
 963
 964    ralloc_free(intelScreen);
 965    sPriv->driverPrivate = NULL;
 966 }
 967
 968
 969 /**
 970  * This is called when we need to set up GL rendering to a new X window.
 971  */
 972 static GLboolean
 973 intelCreateBuffer(__DRIscreen * driScrnPriv,
 974                   __DRIdrawable * driDrawPriv,
 975                   const struct gl_config * mesaVis, GLboolean isPixmap)
 976 {
 977    struct intel_renderbuffer *rb;
 978    struct intel_screen *screen = (struct intel_screen*) driScrnPriv->driverPrivate;
 979    mesa_format rgbFormat;
 980    unsigned num_samples = intel_quantize_num_samples(screen, mesaVis->samples);
 981    struct gl_framebuffer *fb;
 982
 983    if (isPixmap)
 984       return false;
 985
 986    fb = CALLOC_STRUCT(gl_framebuffer);
 987    if (!fb)
 988       return false;
 989
 990    _mesa_initialize_window_framebuffer(fb, mesaVis);
 991
 992    if (screen->winsys_msaa_samples_override != -1) {
 993       num_samples = screen->winsys_msaa_samples_override;
 994       fb->Visual.samples = num_samples;
 995    }
 996
 997    if (mesaVis->redBits == 5)
 998       rgbFormat = MESA_FORMAT_B5G6R5_UNORM;
 999    else if (mesaVis->sRGBCapable)
1000       rgbFormat = MESA_FORMAT_B8G8R8A8_SRGB;
1001    else if (mesaVis->alphaBits == 0)
1002       rgbFormat = MESA_FORMAT_B8G8R8X8_UNORM;
1003    else {
1004       rgbFormat = MESA_FORMAT_B8G8R8A8_SRGB;
1005       fb->Visual.sRGBCapable = true;
1006    }
1007
1008    /* setup the hardware-based renderbuffers */
1009    rb = intel_create_renderbuffer(rgbFormat, num_samples);
1010    _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base.Base);
1011
1012    if (mesaVis->doubleBufferMode) {
1013       rb = intel_create_renderbuffer(rgbFormat, num_samples);
1014       _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base.Base);
1015    }
1016
1017    /*
1018     * Assert here that the gl_config has an expected depth/stencil bit
1019     * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
1020     * which constructs the advertised configs.)
1021     */
1022    if (mesaVis->depthBits == 24) {
1023       assert(mesaVis->stencilBits == 8);
1024
1025       if (screen->devinfo->has_hiz_and_separate_stencil) {
1026          rb = intel_create_private_renderbuffer(MESA_FORMAT_Z24_UNORM_X8_UINT,
1027                                                 num_samples);
1028          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
1029          rb = intel_create_private_renderbuffer(MESA_FORMAT_S_UINT8,
1030                                                 num_samples);
1031          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
1032       } else {
1033          /*
1034           * Use combined depth/stencil. Note that the renderbuffer is
1035           * attached to two attachment points.
1036           */
1037          rb = intel_create_private_renderbuffer(MESA_FORMAT_Z24_UNORM_S8_UINT,
1038                                                 num_samples);
1039          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
1040          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
1041       }
1042    }
1043    else if (mesaVis->depthBits == 16) {
1044       assert(mesaVis->stencilBits == 0);
1045       rb = intel_create_private_renderbuffer(MESA_FORMAT_Z_UNORM16,
1046                                              num_samples);
1047       _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
1048    }
1049    else {
1050       assert(mesaVis->depthBits == 0);
1051       assert(mesaVis->stencilBits == 0);
1052    }
1053
1054    /* now add any/all software-based renderbuffers we may need */
1055    _swrast_add_soft_renderbuffers(fb,
1056                                   false, /* never sw color */
1057                                   false, /* never sw depth */
1058                                   false, /* never sw stencil */
1059                                   mesaVis->accumRedBits > 0,
1060                                   false, /* never sw alpha */
1061                                   false  /* never sw aux */ );
1062    driDrawPriv->driverPrivate = fb;
1063
1064    return true;
1065 }
1066
1067 static void
1068 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
1069 {
1070     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
1071
1072     _mesa_reference_framebuffer(&fb, NULL);
1073 }
1074
1075 static bool
1076 intel_init_bufmgr(struct intel_screen *intelScreen)
1077 {
1078    __DRIscreen *spriv = intelScreen->driScrnPriv;
1079
1080    intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
1081
1082    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
1083    if (intelScreen->bufmgr == NULL) {
1084       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
1085               __func__, __LINE__);
1086       return false;
1087    }
1088
1089    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
1090
1091    if (!intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA)) {
1092       fprintf(stderr, "[%s: %u] Kernel 2.6.39 required.\n", __func__, __LINE__);
1093       return false;
1094    }
1095
1096    return true;
1097 }
1098
1099 static bool
1100 intel_detect_swizzling(struct intel_screen *screen)
1101 {
1102    drm_intel_bo *buffer;
1103    unsigned long flags = 0;
1104    unsigned long aligned_pitch;
1105    uint32_t tiling = I915_TILING_X;
1106    uint32_t swizzle_mode = 0;
1107
1108    buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "swizzle test",
1109                                      64, 64, 4,
1110                                      &tiling, &aligned_pitch, flags);
1111    if (buffer == NULL)
1112       return false;
1113
1114    drm_intel_bo_get_tiling(buffer, &tiling, &swizzle_mode);
1115    drm_intel_bo_unreference(buffer);
1116
1117    if (swizzle_mode == I915_BIT_6_SWIZZLE_NONE)
1118       return false;
1119    else
1120       return true;
1121 }
1122
1123 /**
1124  * Return array of MSAA modes supported by the hardware. The array is
1125  * zero-terminated and sorted in decreasing order.
1126  */
1127 const int*
1128 intel_supported_msaa_modes(const struct intel_screen  *screen)
1129 {
1130    static const int gen8_modes[] = {8, 4, 2, 0, -1};
1131    static const int gen7_modes[] = {8, 4, 0, -1};
1132    static const int gen6_modes[] = {4, 0, -1};
1133    static const int gen4_modes[] = {0, -1};
1134
1135    if (screen->devinfo->gen >= 8) {
1136       return gen8_modes;
1137    } else if (screen->devinfo->gen >= 7) {
1138       return gen7_modes;
1139    } else if (screen->devinfo->gen == 6) {
1140       return gen6_modes;
1141    } else {
1142       return gen4_modes;
1143    }
1144 }
1145
1146 static __DRIconfig**
1147 intel_screen_make_configs(__DRIscreen *dri_screen)
1148 {
1149    static const mesa_format formats[] = {
1150       MESA_FORMAT_B5G6R5_UNORM,
1151       MESA_FORMAT_B8G8R8A8_UNORM,
1152       MESA_FORMAT_B8G8R8X8_UNORM
1153    };
1154
1155    /* GLX_SWAP_COPY_OML is not supported due to page flipping. */
1156    static const GLenum back_buffer_modes[] = {
1157        GLX_SWAP_UNDEFINED_OML, GLX_NONE,
1158    };
1159
1160    static const uint8_t singlesample_samples[1] = {0};
1161    static const uint8_t multisample_samples[2]  = {4, 8};
1162
1163    struct intel_screen *screen = dri_screen->driverPrivate;
1164    const struct brw_device_info *devinfo = screen->devinfo;
1165    uint8_t depth_bits[4], stencil_bits[4];
1166    __DRIconfig **configs = NULL;
1167
1168    /* Generate singlesample configs without accumulation buffer. */
1169    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1170       __DRIconfig **new_configs;
1171       int num_depth_stencil_bits = 2;
1172
1173       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
1174        * buffer that has a different number of bits per pixel than the color
1175        * buffer, gen >= 6 supports this.
1176        */
1177       depth_bits[0] = 0;
1178       stencil_bits[0] = 0;
1179
1180       if (formats[i] == MESA_FORMAT_B5G6R5_UNORM) {
1181          depth_bits[1] = 16;
1182          stencil_bits[1] = 0;
1183          if (devinfo->gen >= 6) {
1184              depth_bits[2] = 24;
1185              stencil_bits[2] = 8;
1186              num_depth_stencil_bits = 3;
1187          }
1188       } else {
1189          depth_bits[1] = 24;
1190          stencil_bits[1] = 8;
1191       }
1192
1193       new_configs = driCreateConfigs(formats[i],
1194                                      depth_bits,
1195                                      stencil_bits,
1196                                      num_depth_stencil_bits,
1197                                      back_buffer_modes, 2,
1198                                      singlesample_samples, 1,
1199                                      false);
1200       configs = driConcatConfigs(configs, new_configs);
1201    }
1202
1203    /* Generate the minimum possible set of configs that include an
1204     * accumulation buffer.
1205     */
1206    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1207       __DRIconfig **new_configs;
1208
1209       if (formats[i] == MESA_FORMAT_B5G6R5_UNORM) {
1210          depth_bits[0] = 16;
1211          stencil_bits[0] = 0;
1212       } else {
1213          depth_bits[0] = 24;
1214          stencil_bits[0] = 8;
1215       }
1216
1217       new_configs = driCreateConfigs(formats[i],
1218                                      depth_bits, stencil_bits, 1,
1219                                      back_buffer_modes, 1,
1220                                      singlesample_samples, 1,
1221                                      true);
1222       configs = driConcatConfigs(configs, new_configs);
1223    }
1224
1225    /* Generate multisample configs.
1226     *
1227     * This loop breaks early, and hence is a no-op, on gen < 6.
1228     *
1229     * Multisample configs must follow the singlesample configs in order to
1230     * work around an X server bug present in 1.12. The X server chooses to
1231     * associate the first listed RGBA888-Z24S8 config, regardless of its
1232     * sample count, with the 32-bit depth visual used for compositing.
1233     *
1234     * Only doublebuffer configs with GLX_SWAP_UNDEFINED_OML behavior are
1235     * supported.  Singlebuffer configs are not supported because no one wants
1236     * them.
1237     */
1238    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1239       if (devinfo->gen < 6)
1240          break;
1241
1242       __DRIconfig **new_configs;
1243       const int num_depth_stencil_bits = 2;
1244       int num_msaa_modes = 0;
1245
1246       depth_bits[0] = 0;
1247       stencil_bits[0] = 0;
1248
1249       if (formats[i] == MESA_FORMAT_B5G6R5_UNORM) {
1250          depth_bits[1] = 16;
1251          stencil_bits[1] = 0;
1252       } else {
1253          depth_bits[1] = 24;
1254          stencil_bits[1] = 8;
1255       }
1256
1257       if (devinfo->gen >= 7)
1258          num_msaa_modes = 2;
1259       else if (devinfo->gen == 6)
1260          num_msaa_modes = 1;
1261
1262       new_configs = driCreateConfigs(formats[i],
1263                                      depth_bits,
1264                                      stencil_bits,
1265                                      num_depth_stencil_bits,
1266                                      back_buffer_modes, 1,
1267                                      multisample_samples,
1268                                      num_msaa_modes,
1269                                      false);
1270       configs = driConcatConfigs(configs, new_configs);
1271    }
1272
1273    if (configs == NULL) {
1274       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
1275               __LINE__);
1276       return NULL;
1277    }
1278
1279    return configs;
1280 }
1281
1282 static void
1283 set_max_gl_versions(struct intel_screen *screen)
1284 {
1285    __DRIscreen *psp = screen->driScrnPriv;
1286
1287    switch (screen->devinfo->gen) {
1288    case 9:
1289    case 8:
1290    case 7:
1291    case 6:
1292       psp->max_gl_core_version = 33;
1293       psp->max_gl_compat_version = 30;
1294       psp->max_gl_es1_version = 11;
1295       psp->max_gl_es2_version = 30;
1296       break;
1297    case 5:
1298    case 4:
1299       psp->max_gl_core_version = 0;
1300       psp->max_gl_compat_version = 21;
1301       psp->max_gl_es1_version = 11;
1302       psp->max_gl_es2_version = 20;
1303       break;
1304    default:
1305       unreachable("unrecognized intel_screen::gen");
1306    }
1307 }
1308
1309 /* drop when libdrm 2.4.61 is released */
1310 #ifndef I915_PARAM_REVISION
1311 #define I915_PARAM_REVISION 32
1312 #endif
1313
1314 static int
1315 brw_get_revision(int fd)
1316 {
1317    struct drm_i915_getparam gp;
1318    int revision;
1319    int ret;
1320
1321    memset(&gp, 0, sizeof(gp));
1322    gp.param = I915_PARAM_REVISION;
1323    gp.value = &revision;
1324
1325    ret = drmCommandWriteRead(fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
1326    if (ret)
1327       revision = -1;
1328
1329    return revision;
1330 }
1331
1332 /**
1333  * This is the driver specific part of the createNewScreen entry point.
1334  * Called when using DRI2.
1335  *
1336  * \return the struct gl_config supported by this driver
1337  */
1338 static const
1339 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
1340 {
1341    struct intel_screen *intelScreen;
1342
1343    if (psp->image.loader) {
1344    } else if (psp->dri2.loader->base.version <= 2 ||
1345        psp->dri2.loader->getBuffersWithFormat == NULL) {
1346       fprintf(stderr,
1347               "\nERROR!  DRI2 loader with getBuffersWithFormat() "
1348               "support required\n");
1349       return false;
1350    }
1351
1352    /* Allocate the private area */
1353    intelScreen = rzalloc(NULL, struct intel_screen);
1354    if (!intelScreen) {
1355       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
1356       return false;
1357    }
1358    /* parse information in __driConfigOptions */
1359    driParseOptionInfo(&intelScreen->optionCache, brw_config_options.xml);
1360
1361    intelScreen->driScrnPriv = psp;
1362    psp->driverPrivate = (void *) intelScreen;
1363
1364    if (!intel_init_bufmgr(intelScreen))
1365        return false;
1366
1367    intelScreen->deviceID = drm_intel_bufmgr_gem_get_devid(intelScreen->bufmgr);
1368    intelScreen->devinfo = brw_get_device_info(intelScreen->deviceID,
1369                                               brw_get_revision(psp->fd));
1370    if (!intelScreen->devinfo)
1371       return false;
1372
1373    intelScreen->hw_must_use_separate_stencil = intelScreen->devinfo->gen >= 7;
1374
1375    intelScreen->hw_has_swizzling = intel_detect_swizzling(intelScreen);
1376
1377    const char *force_msaa = getenv("INTEL_FORCE_MSAA");
1378    if (force_msaa) {
1379       intelScreen->winsys_msaa_samples_override =
1380          intel_quantize_num_samples(intelScreen, atoi(force_msaa));
1381       printf("Forcing winsys sample count to %d\n",
1382              intelScreen->winsys_msaa_samples_override);
1383    } else {
1384       intelScreen->winsys_msaa_samples_override = -1;
1385    }
1386
1387    set_max_gl_versions(intelScreen);
1388
1389    /* Notification of GPU resets requires hardware contexts and a kernel new
1390     * enough to support DRM_IOCTL_I915_GET_RESET_STATS.  If the ioctl is
1391     * supported, calling it with a context of 0 will either generate EPERM or
1392     * no error.  If the ioctl is not supported, it always generate EINVAL.
1393     * Use this to determine whether to advertise the __DRI2_ROBUSTNESS
1394     * extension to the loader.
1395     *
1396     * Don't even try on pre-Gen6, since we don't attempt to use contexts there.
1397     */
1398    if (intelScreen->devinfo->gen >= 6) {
1399       struct drm_i915_reset_stats stats;
1400       memset(&stats, 0, sizeof(stats));
1401
1402       const int ret = drmIoctl(psp->fd, DRM_IOCTL_I915_GET_RESET_STATS, &stats);
1403
1404       intelScreen->has_context_reset_notification =
1405          (ret != -1 || errno != EINVAL);
1406    }
1407
1408    psp->extensions = !intelScreen->has_context_reset_notification
1409       ? intelScreenExtensions : intelRobustScreenExtensions;
1410
1411    intelScreen->compiler = brw_compiler_create(intelScreen,
1412                                                intelScreen->devinfo);
1413
1414    return (const __DRIconfig**) intel_screen_make_configs(psp);
1415 }
1416
1417 struct intel_buffer {
1418    __DRIbuffer base;
1419    drm_intel_bo *bo;
1420 };
1421
1422 static __DRIbuffer *
1423 intelAllocateBuffer(__DRIscreen *screen,
1424                     unsigned attachment, unsigned format,
1425                     int width, int height)
1426 {
1427    struct intel_buffer *intelBuffer;
1428    struct intel_screen *intelScreen = screen->driverPrivate;
1429
1430    assert(attachment == __DRI_BUFFER_FRONT_LEFT ||
1431           attachment == __DRI_BUFFER_BACK_LEFT);
1432
1433    intelBuffer = calloc(1, sizeof *intelBuffer);
1434    if (intelBuffer == NULL)
1435       return NULL;
1436
1437    /* The front and back buffers are color buffers, which are X tiled. */
1438    uint32_t tiling = I915_TILING_X;
1439    unsigned long pitch;
1440    int cpp = format / 8;
1441    intelBuffer->bo = drm_intel_bo_alloc_tiled(intelScreen->bufmgr,
1442                                               "intelAllocateBuffer",
1443                                               width,
1444                                               height,
1445                                               cpp,
1446                                               &tiling, &pitch,
1447                                               BO_ALLOC_FOR_RENDER);
1448
1449    if (intelBuffer->bo == NULL) {
1450            free(intelBuffer);
1451            return NULL;
1452    }
1453
1454    drm_intel_bo_flink(intelBuffer->bo, &intelBuffer->base.name);
1455
1456    intelBuffer->base.attachment = attachment;
1457    intelBuffer->base.cpp = cpp;
1458    intelBuffer->base.pitch = pitch;
1459
1460    return &intelBuffer->base;
1461 }
1462
1463 static void
1464 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
1465 {
1466    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
1467
1468    drm_intel_bo_unreference(intelBuffer->bo);
1469    free(intelBuffer);
1470 }
1471
1472 static const struct __DriverAPIRec brw_driver_api = {
1473    .InitScreen           = intelInitScreen2,
1474    .DestroyScreen        = intelDestroyScreen,
1475    .CreateContext        = brwCreateContext,
1476    .DestroyContext       = intelDestroyContext,
1477    .CreateBuffer         = intelCreateBuffer,
1478    .DestroyBuffer        = intelDestroyBuffer,
1479    .MakeCurrent          = intelMakeCurrent,
1480    .UnbindContext        = intelUnbindContext,
1481    .AllocateBuffer       = intelAllocateBuffer,
1482    .ReleaseBuffer        = intelReleaseBuffer
1483 };
1484
1485 static const struct __DRIDriverVtableExtensionRec brw_vtable = {
1486    .base = { __DRI_DRIVER_VTABLE, 1 },
1487    .vtable = &brw_driver_api,
1488 };
1489
1490 static const __DRIextension *brw_driver_extensions[] = {
1491     &driCoreExtension.base,
1492     &driImageDriverExtension.base,
1493     &driDRI2Extension.base,
1494     &brw_vtable.base,
1495     &brw_config_options.base,
1496     NULL
1497 };
1498
1499 PUBLIC const __DRIextension **__driDriverGetExtensions_i965(void)
1500 {
1501    globalDriverAPI = &brw_driver_api;
1502
1503    return brw_driver_extensions;
1504 }