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

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <errno.h>
  29 #include "main/glheader.h"
  30 #include "main/context.h"
  31 #include "main/framebuffer.h"
  32 #include "main/renderbuffer.h"
  33 #include "main/hash.h"
  34 #include "main/fbobject.h"
  35 #include "main/mfeatures.h"
  36 #include "main/version.h"
  37 #include "swrast/s_renderbuffer.h"
  38
  39 #include "utils.h"
  40 #include "xmlpool.h"
  41
  42 PUBLIC const char __driConfigOptions[] =
  43    DRI_CONF_BEGIN
  44    DRI_CONF_SECTION_PERFORMANCE
  45       DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
  46       /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
  47        * DRI_CONF_BO_REUSE_ALL
  48        */
  49       DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
  50          DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
  51             DRI_CONF_ENUM(0, "Disable buffer object reuse")
  52             DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
  53          DRI_CONF_DESC_END
  54       DRI_CONF_OPT_END
  55
  56       DRI_CONF_OPT_BEGIN(texture_tiling, bool, true)
  57          DRI_CONF_DESC(en, "Enable texture tiling")
  58       DRI_CONF_OPT_END
  59
  60       DRI_CONF_OPT_BEGIN(hiz, bool, true)
  61          DRI_CONF_DESC(en, "Enable Hierarchical Z on gen6+")
  62       DRI_CONF_OPT_END
  63
  64       DRI_CONF_OPT_BEGIN(early_z, bool, false)
  65          DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
  66       DRI_CONF_OPT_END
  67
  68       DRI_CONF_OPT_BEGIN(fragment_shader, bool, true)
  69          DRI_CONF_DESC(en, "Enable limited ARB_fragment_shader support on 915/945.")
  70       DRI_CONF_OPT_END
  71
  72    DRI_CONF_SECTION_END
  73    DRI_CONF_SECTION_QUALITY
  74       DRI_CONF_FORCE_S3TC_ENABLE(false)
  75       DRI_CONF_ALLOW_LARGE_TEXTURES(2)
  76    DRI_CONF_SECTION_END
  77    DRI_CONF_SECTION_DEBUG
  78      DRI_CONF_NO_RAST(false)
  79      DRI_CONF_ALWAYS_FLUSH_BATCH(false)
  80      DRI_CONF_ALWAYS_FLUSH_CACHE(false)
  81      DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN(false)
  82
  83       DRI_CONF_OPT_BEGIN(stub_occlusion_query, bool, false)
  84          DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
  85       DRI_CONF_OPT_END
  86
  87       DRI_CONF_OPT_BEGIN(shader_precompile, bool, false)
  88          DRI_CONF_DESC(en, "Perform code generation at shader link time.")
  89       DRI_CONF_OPT_END
  90    DRI_CONF_SECTION_END
  91 DRI_CONF_END;
  92
  93 const GLuint __driNConfigOptions = 14;
  94
  95 #include "intel_batchbuffer.h"
  96 #include "intel_buffers.h"
  97 #include "intel_bufmgr.h"
  98 #include "intel_chipset.h"
  99 #include "intel_fbo.h"
 100 #include "intel_mipmap_tree.h"
 101 #include "intel_screen.h"
 102 #include "intel_tex.h"
 103 #include "intel_regions.h"
 104
 105 #include "i915_drm.h"
 106
 107 #ifdef USE_NEW_INTERFACE
 108 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
 109 #endif /*USE_NEW_INTERFACE */
 110
 111 static const __DRItexBufferExtension intelTexBufferExtension = {
 112     { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 113    intelSetTexBuffer,
 114    intelSetTexBuffer2,
 115 };
 116
 117 static void
 118 intelDRI2Flush(__DRIdrawable *drawable)
 119 {
 120    GET_CURRENT_CONTEXT(ctx);
 121    struct intel_context *intel = intel_context(ctx);
 122    if (intel == NULL)
 123       return;
 124
 125    if (intel->gen < 4)
 126       INTEL_FIREVERTICES(intel);
 127
 128    intel->need_throttle = true;
 129
 130    if (intel->batch.used)
 131       intel_batchbuffer_flush(intel);
 132
 133    if (INTEL_DEBUG & DEBUG_AUB) {
 134       struct gl_framebuffer *fb = ctx->DrawBuffer;
 135
 136       for (int i = 0; i < fb->_NumColorDrawBuffers; i++) {
 137          struct intel_renderbuffer *irb =
 138             intel_renderbuffer(fb->_ColorDrawBuffers[i]);
 139
 140          if (irb && irb->mt) {
 141             enum aub_dump_bmp_format format;
 142
 143             switch (irb->Base.Base.Format) {
 144             case MESA_FORMAT_ARGB8888:
 145             case MESA_FORMAT_XRGB8888:
 146                format = AUB_DUMP_BMP_FORMAT_ARGB_8888;
 147                break;
 148             default:
 149                continue;
 150             }
 151
 152             drm_intel_gem_bo_aub_dump_bmp(irb->mt->region->bo,
 153                                           irb->draw_x,
 154                                           irb->draw_y,
 155                                           irb->Base.Base.Width,
 156                                           irb->Base.Base.Height,
 157                                           format,
 158                                           irb->mt->region->pitch *
 159                                           irb->mt->region->cpp,
 160                                           0);
 161          }
 162       }
 163    }
 164 }
 165
 166 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 167     { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
 168     intelDRI2Flush,
 169     dri2InvalidateDrawable,
 170 };
 171
 172 static __DRIimage *
 173 intel_create_image_from_name(__DRIscreen *screen,
 174                              int width, int height, int format,
 175                              int name, int pitch, void *loaderPrivate)
 176 {
 177     struct intel_screen *intelScreen = screen->driverPrivate;
 178     __DRIimage *image;
 179     int cpp;
 180
 181     image = CALLOC(sizeof *image);
 182     if (image == NULL)
 183         return NULL;
 184
 185     switch (format) {
 186     case __DRI_IMAGE_FORMAT_RGB565:
 187        image->format = MESA_FORMAT_RGB565;
 188        image->internal_format = GL_RGB;
 189        image->data_type = GL_UNSIGNED_BYTE;
 190        break;
 191     case __DRI_IMAGE_FORMAT_XRGB8888:
 192        image->format = MESA_FORMAT_XRGB8888;
 193        image->internal_format = GL_RGB;
 194        image->data_type = GL_UNSIGNED_BYTE;
 195        break;
 196     case __DRI_IMAGE_FORMAT_ARGB8888:
 197        image->format = MESA_FORMAT_ARGB8888;
 198        image->internal_format = GL_RGBA;
 199        image->data_type = GL_UNSIGNED_BYTE;
 200        break;
 201     case __DRI_IMAGE_FORMAT_ABGR8888:
 202        image->format = MESA_FORMAT_RGBA8888_REV;
 203        image->internal_format = GL_RGBA;
 204        image->data_type = GL_UNSIGNED_BYTE;
 205        break;
 206     default:
 207        free(image);
 208        return NULL;
 209     }
 210
 211     image->data = loaderPrivate;
 212     cpp = _mesa_get_format_bytes(image->format);
 213
 214     image->region = intel_region_alloc_for_handle(intelScreen,
 215                                                   cpp, width, height,
 216                                                   pitch, name, "image");
 217     if (image->region == NULL) {
 218        FREE(image);
 219        return NULL;
 220     }
 221
 222     return image;
 223 }
 224
 225 static __DRIimage *
 226 intel_create_image_from_renderbuffer(__DRIcontext *context,
 227                                      int renderbuffer, void *loaderPrivate)
 228 {
 229    __DRIimage *image;
 230    struct intel_context *intel = context->driverPrivate;
 231    struct gl_renderbuffer *rb;
 232    struct intel_renderbuffer *irb;
 233
 234    rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
 235    if (!rb) {
 236       _mesa_error(&intel->ctx,
 237                   GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 238       return NULL;
 239    }
 240
 241    irb = intel_renderbuffer(rb);
 242    image = CALLOC(sizeof *image);
 243    if (image == NULL)
 244       return NULL;
 245
 246    image->internal_format = rb->InternalFormat;
 247    image->format = rb->Format;
 248    image->data_type = GL_UNSIGNED_BYTE;
 249    image->data = loaderPrivate;
 250    intel_region_reference(&image->region, irb->mt->region);
 251
 252    return image;
 253 }
 254
 255 static void
 256 intel_destroy_image(__DRIimage *image)
 257 {
 258     intel_region_release(&image->region);
 259     FREE(image);
 260 }
 261
 262 static __DRIimage *
 263 intel_create_image(__DRIscreen *screen,
 264                    int width, int height, int format,
 265                    unsigned int use,
 266                    void *loaderPrivate)
 267 {
 268    __DRIimage *image;
 269    struct intel_screen *intelScreen = screen->driverPrivate;
 270    uint32_t tiling;
 271    int cpp;
 272
 273    tiling = I915_TILING_X;
 274    if (use & __DRI_IMAGE_USE_CURSOR) {
 275       if (width != 64 || height != 64)
 276          return NULL;
 277       tiling = I915_TILING_NONE;
 278    }
 279
 280    image = CALLOC(sizeof *image);
 281    if (image == NULL)
 282       return NULL;
 283
 284    image->dri_format = format;
 285
 286    switch (format) {
 287    case __DRI_IMAGE_FORMAT_RGB565:
 288       image->format = MESA_FORMAT_RGB565;
 289       image->internal_format = GL_RGB;
 290       image->data_type = GL_UNSIGNED_BYTE;
 291       break;
 292    case __DRI_IMAGE_FORMAT_XRGB8888:
 293       image->format = MESA_FORMAT_XRGB8888;
 294       image->internal_format = GL_RGB;
 295       image->data_type = GL_UNSIGNED_BYTE;
 296       break;
 297    case __DRI_IMAGE_FORMAT_ARGB8888:
 298       image->format = MESA_FORMAT_ARGB8888;
 299       image->internal_format = GL_RGBA;
 300       image->data_type = GL_UNSIGNED_BYTE;
 301       break;
 302     case __DRI_IMAGE_FORMAT_ABGR8888:
 303        image->format = MESA_FORMAT_RGBA8888_REV;
 304        image->internal_format = GL_RGBA;
 305        image->data_type = GL_UNSIGNED_BYTE;
 306        break;
 307    default:
 308       free(image);
 309       return NULL;
 310    }
 311
 312    image->data = loaderPrivate;
 313    cpp = _mesa_get_format_bytes(image->format);
 314
 315    image->region =
 316       intel_region_alloc(intelScreen, tiling,
 317                          cpp, width, height, true);
 318    if (image->region == NULL) {
 319       FREE(image);
 320       return NULL;
 321    }
 322
 323    return image;
 324 }
 325
 326 static GLboolean
 327 intel_query_image(__DRIimage *image, int attrib, int *value)
 328 {
 329    switch (attrib) {
 330    case __DRI_IMAGE_ATTRIB_STRIDE:
 331       *value = image->region->pitch * image->region->cpp;
 332       return true;
 333    case __DRI_IMAGE_ATTRIB_HANDLE:
 334       *value = image->region->bo->handle;
 335       return true;
 336    case __DRI_IMAGE_ATTRIB_NAME:
 337       return intel_region_flink(image->region, (uint32_t *) value);
 338    case __DRI_IMAGE_ATTRIB_FORMAT:
 339       return image->dri_format;
 340    default:
 341       return false;
 342    }
 343 }
 344
 345 static __DRIimage *
 346 intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
 347 {
 348    __DRIimage *image;
 349
 350    image = CALLOC(sizeof *image);
 351    if (image == NULL)
 352       return NULL;
 353
 354    intel_region_reference(&image->region, orig_image->region);
 355    if (image->region == NULL) {
 356       FREE(image);
 357       return NULL;
 358    }
 359
 360    image->internal_format = orig_image->internal_format;
 361    image->format          = orig_image->format;
 362    image->data_type       = orig_image->data_type;
 363    image->data            = loaderPrivate;
 364
 365    return image;
 366 }
 367
 368 static GLboolean
 369 intel_validate_usage(__DRIimage *image, unsigned int use)
 370 {
 371    if (use & __DRI_IMAGE_USE_CURSOR) {
 372       if (image->region->width != 64 || image->region->height != 64)
 373          return GL_FALSE;
 374    }
 375
 376    return GL_TRUE;
 377 }
 378
 379 static struct __DRIimageExtensionRec intelImageExtension = {
 380     { __DRI_IMAGE, 3 },
 381     intel_create_image_from_name,
 382     intel_create_image_from_renderbuffer,
 383     intel_destroy_image,
 384     intel_create_image,
 385     intel_query_image,
 386     intel_dup_image,
 387     intel_validate_usage
 388 };
 389
 390 static const __DRIextension *intelScreenExtensions[] = {
 391     &intelTexBufferExtension.base,
 392     &intelFlushExtension.base,
 393     &intelImageExtension.base,
 394     &dri2ConfigQueryExtension.base,
 395     NULL
 396 };
 397
 398 static bool
 399 intel_get_param(__DRIscreen *psp, int param, int *value)
 400 {
 401    int ret;
 402    struct drm_i915_getparam gp;
 403
 404    memset(&gp, 0, sizeof(gp));
 405    gp.param = param;
 406    gp.value = value;
 407
 408    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 409    if (ret) {
 410       if (ret != -EINVAL)
 411          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 412       return false;
 413    }
 414
 415    return true;
 416 }
 417
 418 static bool
 419 intel_get_boolean(__DRIscreen *psp, int param)
 420 {
 421    int value = 0;
 422    return intel_get_param(psp, param, &value) && value;
 423 }
 424
 425 static void
 426 nop_callback(GLuint key, void *data, void *userData)
 427 {
 428 }
 429
 430 static void
 431 intelDestroyScreen(__DRIscreen * sPriv)
 432 {
 433    struct intel_screen *intelScreen = sPriv->driverPrivate;
 434
 435    dri_bufmgr_destroy(intelScreen->bufmgr);
 436    driDestroyOptionInfo(&intelScreen->optionCache);
 437
 438    /* Some regions may still have references to them at this point, so
 439     * flush the hash table to prevent _mesa_DeleteHashTable() from
 440     * complaining about the hash not being empty; */
 441    _mesa_HashDeleteAll(intelScreen->named_regions, nop_callback, NULL);
 442    _mesa_DeleteHashTable(intelScreen->named_regions);
 443
 444    FREE(intelScreen);
 445    sPriv->driverPrivate = NULL;
 446 }
 447
 448
 449 /**
 450  * This is called when we need to set up GL rendering to a new X window.
 451  */
 452 static GLboolean
 453 intelCreateBuffer(__DRIscreen * driScrnPriv,
 454                   __DRIdrawable * driDrawPriv,
 455                   const struct gl_config * mesaVis, GLboolean isPixmap)
 456 {
 457    struct intel_renderbuffer *rb;
 458    struct intel_screen *screen = (struct intel_screen*) driScrnPriv->driverPrivate;
 459
 460    if (isPixmap) {
 461       return false;          /* not implemented */
 462    }
 463    else {
 464       gl_format rgbFormat;
 465
 466       struct gl_framebuffer *fb = CALLOC_STRUCT(gl_framebuffer);
 467
 468       if (!fb)
 469          return false;
 470
 471       _mesa_initialize_window_framebuffer(fb, mesaVis);
 472
 473       if (mesaVis->redBits == 5)
 474          rgbFormat = MESA_FORMAT_RGB565;
 475       else if (mesaVis->alphaBits == 0)
 476          rgbFormat = MESA_FORMAT_XRGB8888;
 477       else
 478          rgbFormat = MESA_FORMAT_ARGB8888;
 479
 480       /* setup the hardware-based renderbuffers */
 481       rb = intel_create_renderbuffer(rgbFormat);
 482       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base.Base);
 483
 484       if (mesaVis->doubleBufferMode) {
 485          rb = intel_create_renderbuffer(rgbFormat);
 486          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base.Base);
 487       }
 488
 489       /*
 490        * Assert here that the gl_config has an expected depth/stencil bit
 491        * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
 492        * which constructs the advertised configs.)
 493        */
 494       if (mesaVis->depthBits == 24) {
 495          assert(mesaVis->stencilBits == 8);
 496
 497          if (screen->hw_has_separate_stencil
 498              && screen->dri2_has_hiz != INTEL_DRI2_HAS_HIZ_FALSE) {
 499             /*
 500              * Request a separate stencil buffer even if we do not yet know if
 501              * the screen supports it. (See comments for
 502              * enum intel_dri2_has_hiz).
 503              */
 504             rb = intel_create_renderbuffer(MESA_FORMAT_X8_Z24);
 505             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 506             rb = intel_create_renderbuffer(MESA_FORMAT_S8);
 507             _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 508          } else {
 509             /*
 510              * Use combined depth/stencil. Note that the renderbuffer is
 511              * attached to two attachment points.
 512              */
 513             rb = intel_create_renderbuffer(MESA_FORMAT_S8_Z24);
 514             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 515             _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 516          }
 517       }
 518       else if (mesaVis->depthBits == 16) {
 519          assert(mesaVis->stencilBits == 0);
 520          /* just 16-bit depth buffer, no hw stencil */
 521          struct intel_renderbuffer *depthRb
 522             = intel_create_renderbuffer(MESA_FORMAT_Z16);
 523          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base.Base);
 524       }
 525       else {
 526          assert(mesaVis->depthBits == 0);
 527          assert(mesaVis->stencilBits == 0);
 528       }
 529
 530       /* now add any/all software-based renderbuffers we may need */
 531       _swrast_add_soft_renderbuffers(fb,
 532                                      false, /* never sw color */
 533                                      false, /* never sw depth */
 534                                      false, /* never sw stencil */
 535                                      mesaVis->accumRedBits > 0,
 536                                      false, /* never sw alpha */
 537                                      false  /* never sw aux */ );
 538       driDrawPriv->driverPrivate = fb;
 539
 540       return true;
 541    }
 542 }
 543
 544 static void
 545 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 546 {
 547     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 548
 549     _mesa_reference_framebuffer(&fb, NULL);
 550 }
 551
 552 /* There are probably better ways to do this, such as an
 553  * init-designated function to register chipids and createcontext
 554  * functions.
 555  */
 556 extern bool
 557 i830CreateContext(const struct gl_config *mesaVis,
 558                   __DRIcontext *driContextPriv,
 559                   void *sharedContextPrivate);
 560
 561 extern bool
 562 i915CreateContext(int api,
 563                   const struct gl_config *mesaVis,
 564                   __DRIcontext *driContextPriv,
 565                   void *sharedContextPrivate);
 566 extern bool
 567 brwCreateContext(int api,
 568                  const struct gl_config *mesaVis,
 569                  __DRIcontext *driContextPriv,
 570                  void *sharedContextPrivate);
 571
 572 static GLboolean
 573 intelCreateContext(gl_api api,
 574                    const struct gl_config * mesaVis,
 575                    __DRIcontext * driContextPriv,
 576                    unsigned major_version,
 577                    unsigned minor_version,
 578                    uint32_t flags,
 579                    unsigned *error,
 580                    void *sharedContextPrivate)
 581 {
 582    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 583    struct intel_screen *intelScreen = sPriv->driverPrivate;
 584    bool success = false;
 585
 586 #ifdef I915
 587    if (IS_9XX(intelScreen->deviceID)) {
 588       if (!IS_965(intelScreen->deviceID)) {
 589          success = i915CreateContext(api, mesaVis, driContextPriv,
 590                                      sharedContextPrivate);
 591       }
 592    } else {
 593       intelScreen->no_vbo = true;
 594       success = i830CreateContext(mesaVis, driContextPriv,
 595                                   sharedContextPrivate);
 596    }
 597 #else
 598    if (IS_965(intelScreen->deviceID))
 599       success = brwCreateContext(api, mesaVis,
 600                               driContextPriv,
 601                               sharedContextPrivate);
 602 #endif
 603
 604    if (success) {
 605       struct gl_context *ctx =
 606          (struct gl_context *) driContextPriv->driverPrivate;
 607
 608       _mesa_compute_version(ctx);
 609       if (ctx->VersionMajor > major_version
 610           || (ctx->VersionMajor == major_version
 611               && ctx->VersionMinor >= minor_version)) {
 612          *error = __DRI_CTX_ERROR_BAD_VERSION;
 613          return true;
 614       }
 615
 616       intelDestroyContext(driContextPriv);
 617    } else {
 618       *error = __DRI_CTX_ERROR_NO_MEMORY;
 619       fprintf(stderr, "Unrecognized deviceID 0x%x\n", intelScreen->deviceID);
 620    }
 621
 622    return false;
 623 }
 624
 625 static bool
 626 intel_init_bufmgr(struct intel_screen *intelScreen)
 627 {
 628    __DRIscreen *spriv = intelScreen->driScrnPriv;
 629    int num_fences = 0;
 630
 631    intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
 632
 633    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 634    if (intelScreen->bufmgr == NULL) {
 635       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 636               __func__, __LINE__);
 637       return false;
 638    }
 639
 640    if (!intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences) ||
 641        num_fences == 0) {
 642       fprintf(stderr, "[%s: %u] Kernel 2.6.29 required.\n", __func__, __LINE__);
 643       return false;
 644    }
 645
 646    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 647
 648    intelScreen->named_regions = _mesa_NewHashTable();
 649
 650    intelScreen->relaxed_relocations = 0;
 651    intelScreen->relaxed_relocations |=
 652       intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA) << 0;
 653
 654    return true;
 655 }
 656
 657 /**
 658  * Override intel_screen.hw_has_separate_stencil with environment variable
 659  * INTEL_SEPARATE_STENCIL.
 660  *
 661  * Valid values for INTEL_SEPARATE_STENCIL are "0" and "1". If an invalid
 662  * valid value is encountered, a warning is emitted and INTEL_SEPARATE_STENCIL
 663  * is ignored.
 664  */
 665 static void
 666 intel_override_separate_stencil(struct intel_screen *screen)
 667 {
 668    const char *s = getenv("INTEL_SEPARATE_STENCIL");
 669    if (!s) {
 670       return;
 671    } else if (!strncmp("0", s, 2)) {
 672       screen->hw_has_separate_stencil = false;
 673    } else if (!strncmp("1", s, 2)) {
 674       screen->hw_has_separate_stencil = true;
 675    } else {
 676       fprintf(stderr,
 677               "warning: env variable INTEL_SEPARATE_STENCIL=\"%s\" has "
 678               "invalid value and is ignored", s);
 679    }
 680 }
 681
 682 static bool
 683 intel_detect_swizzling(struct intel_screen *screen)
 684 {
 685    drm_intel_bo *buffer;
 686    unsigned long flags = 0;
 687    unsigned long aligned_pitch;
 688    uint32_t tiling = I915_TILING_X;
 689    uint32_t swizzle_mode = 0;
 690
 691    buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "swizzle test",
 692                                      64, 64, 4,
 693                                      &tiling, &aligned_pitch, flags);
 694    if (buffer == NULL)
 695       return false;
 696
 697    drm_intel_bo_get_tiling(buffer, &tiling, &swizzle_mode);
 698    drm_intel_bo_unreference(buffer);
 699
 700    if (swizzle_mode == I915_BIT_6_SWIZZLE_NONE)
 701       return false;
 702    else
 703       return true;
 704 }
 705
 706 /**
 707  * This is the driver specific part of the createNewScreen entry point.
 708  * Called when using DRI2.
 709  *
 710  * \return the struct gl_config supported by this driver
 711  */
 712 static const
 713 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
 714 {
 715    struct intel_screen *intelScreen;
 716    GLenum fb_format[3];
 717    GLenum fb_type[3];
 718    unsigned int api_mask;
 719
 720    static const GLenum back_buffer_modes[] = {
 721        GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 722    };
 723    uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
 724    int color;
 725    __DRIconfig **configs = NULL;
 726
 727    /* Allocate the private area */
 728    intelScreen = CALLOC(sizeof *intelScreen);
 729    if (!intelScreen) {
 730       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
 731       return false;
 732    }
 733    /* parse information in __driConfigOptions */
 734    driParseOptionInfo(&intelScreen->optionCache,
 735                       __driConfigOptions, __driNConfigOptions);
 736
 737    intelScreen->driScrnPriv = psp;
 738    psp->driverPrivate = (void *) intelScreen;
 739
 740    if (!intel_init_bufmgr(intelScreen))
 741        return false;
 742
 743    intelScreen->deviceID = drm_intel_bufmgr_gem_get_devid(intelScreen->bufmgr);
 744
 745    intelScreen->kernel_has_gen7_sol_reset =
 746       intel_get_boolean(intelScreen->driScrnPriv,
 747                         I915_PARAM_HAS_GEN7_SOL_RESET);
 748
 749    if (IS_GEN7(intelScreen->deviceID)) {
 750       intelScreen->gen = 7;
 751    } else if (IS_GEN6(intelScreen->deviceID)) {
 752       intelScreen->gen = 6;
 753    } else if (IS_GEN5(intelScreen->deviceID)) {
 754       intelScreen->gen = 5;
 755    } else if (IS_965(intelScreen->deviceID)) {
 756       intelScreen->gen = 4;
 757    } else if (IS_9XX(intelScreen->deviceID)) {
 758       intelScreen->gen = 3;
 759    } else {
 760       intelScreen->gen = 2;
 761    }
 762
 763    intelScreen->hw_has_separate_stencil = intelScreen->gen >= 6;
 764    intelScreen->hw_must_use_separate_stencil = intelScreen->gen >= 7;
 765    intelScreen->dri2_has_hiz = INTEL_DRI2_HAS_HIZ_UNKNOWN;
 766
 767 #if defined(I915_PARAM_HAS_LLC)
 768    intelScreen->hw_has_llc =
 769       intel_get_boolean(intelScreen->driScrnPriv,
 770               I915_PARAM_HAS_LLC);
 771 #else
 772    intelScreen->hw_has_llc = intelScreen->gen >= 6;
 773 #endif
 774
 775    intel_override_separate_stencil(intelScreen);
 776
 777    api_mask = (1 << __DRI_API_OPENGL);
 778 #if FEATURE_ES1
 779    api_mask |= (1 << __DRI_API_GLES);
 780 #endif
 781 #if FEATURE_ES2
 782    api_mask |= (1 << __DRI_API_GLES2);
 783 #endif
 784
 785    if (IS_9XX(intelScreen->deviceID) || IS_965(intelScreen->deviceID))
 786       psp->api_mask = api_mask;
 787
 788    intelScreen->hw_has_swizzling = intel_detect_swizzling(intelScreen);
 789
 790    psp->extensions = intelScreenExtensions;
 791
 792    msaa_samples_array[0] = 0;
 793
 794    fb_format[0] = GL_RGB;
 795    fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
 796
 797    fb_format[1] = GL_BGR;
 798    fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
 799
 800    fb_format[2] = GL_BGRA;
 801    fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
 802
 803    depth_bits[0] = 0;
 804    stencil_bits[0] = 0;
 805
 806    /* Generate a rich set of useful configs that do not include an
 807     * accumulation buffer.
 808     */
 809    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 810       __DRIconfig **new_configs;
 811       int depth_factor;
 812
 813       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
 814        * buffer that has a diffferent number of bits per pixel than the color
 815        * buffer.  This isn't yet supported here.
 816        */
 817       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 818          depth_bits[1] = 16;
 819          stencil_bits[1] = 0;
 820       } else {
 821          depth_bits[1] = 24;
 822          stencil_bits[1] = 8;
 823       }
 824
 825       depth_factor = 2;
 826
 827       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 828                                      depth_bits,
 829                                      stencil_bits,
 830                                      depth_factor,
 831                                      back_buffer_modes,
 832                                      ARRAY_SIZE(back_buffer_modes),
 833                                      msaa_samples_array,
 834                                      ARRAY_SIZE(msaa_samples_array),
 835                                      false);
 836       if (configs == NULL)
 837          configs = new_configs;
 838       else
 839          configs = driConcatConfigs(configs, new_configs);
 840    }
 841
 842    /* Generate the minimum possible set of configs that include an
 843     * accumulation buffer.
 844     */
 845    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 846       __DRIconfig **new_configs;
 847
 848       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 849          depth_bits[0] = 16;
 850          stencil_bits[0] = 0;
 851       } else {
 852          depth_bits[0] = 24;
 853          stencil_bits[0] = 8;
 854       }
 855
 856       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 857                                      depth_bits, stencil_bits, 1,
 858                                      back_buffer_modes + 1, 1,
 859                                      msaa_samples_array, 1,
 860                                      true);
 861       if (configs == NULL)
 862          configs = new_configs;
 863       else
 864          configs = driConcatConfigs(configs, new_configs);
 865    }
 866
 867    if (configs == NULL) {
 868       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 869               __LINE__);
 870       return NULL;
 871    }
 872
 873    return (const __DRIconfig **)configs;
 874 }
 875
 876 struct intel_buffer {
 877    __DRIbuffer base;
 878    struct intel_region *region;
 879 };
 880
 881 /**
 882  * \brief Get tiling format for a DRI buffer.
 883  *
 884  * \param attachment is the buffer's attachmet point, such as
 885  *        __DRI_BUFFER_DEPTH.
 886  * \param out_tiling is the returned tiling format for buffer.
 887  * \return false if attachment is unrecognized or is incompatible with screen.
 888  */
 889 static bool
 890 intel_get_dri_buffer_tiling(struct intel_screen *screen,
 891                             uint32_t attachment,
 892                             uint32_t *out_tiling)
 893 {
 894    if (screen->gen < 4) {
 895       *out_tiling = I915_TILING_X;
 896       return true;
 897    }
 898
 899    switch (attachment) {
 900    case __DRI_BUFFER_DEPTH:
 901    case __DRI_BUFFER_DEPTH_STENCIL:
 902    case __DRI_BUFFER_HIZ:
 903       *out_tiling = I915_TILING_Y;
 904       return true;
 905    case __DRI_BUFFER_ACCUM:
 906    case __DRI_BUFFER_FRONT_LEFT:
 907    case __DRI_BUFFER_FRONT_RIGHT:
 908    case __DRI_BUFFER_BACK_LEFT:
 909    case __DRI_BUFFER_BACK_RIGHT:
 910    case __DRI_BUFFER_FAKE_FRONT_LEFT:
 911    case __DRI_BUFFER_FAKE_FRONT_RIGHT:
 912       *out_tiling = I915_TILING_X;
 913       return true;
 914    case __DRI_BUFFER_STENCIL:
 915       /* The stencil buffer is W tiled. However, we request from the kernel
 916        * a non-tiled buffer because the GTT is incapable of W fencing.
 917        */
 918       *out_tiling = I915_TILING_NONE;
 919       return true;
 920    default:
 921       if(unlikely(INTEL_DEBUG & DEBUG_DRI)) {
 922          fprintf(stderr, "error: %s: unrecognized DRI buffer attachment 0x%x\n",
 923                  __FUNCTION__, attachment);
 924       }
 925        return false;
 926    }
 927 }
 928
 929 static __DRIbuffer *
 930 intelAllocateBuffer(__DRIscreen *screen,
 931                     unsigned attachment, unsigned format,
 932                     int width, int height)
 933 {
 934    struct intel_buffer *intelBuffer;
 935    struct intel_screen *intelScreen = screen->driverPrivate;
 936
 937    uint32_t tiling;
 938    uint32_t region_width;
 939    uint32_t region_height;
 940    uint32_t region_cpp;
 941
 942    bool ok = true;
 943
 944    ok = intel_get_dri_buffer_tiling(intelScreen, attachment, &tiling);
 945    if (!ok)
 946       return NULL;
 947
 948    intelBuffer = CALLOC(sizeof *intelBuffer);
 949    if (intelBuffer == NULL)
 950       return NULL;
 951
 952    if (attachment == __DRI_BUFFER_STENCIL) {
 953       /* The stencil buffer has quirky pitch requirements.  From Vol 2a,
 954        * 11.5.6.2.1 3DSTATE_STENCIL_BUFFER, field "Surface Pitch":
 955        *    The pitch must be set to 2x the value computed based on width, as
 956        *    the stencil buffer is stored with two rows interleaved.
 957        * To accomplish this, we resort to the nasty hack of doubling the
 958        * region's cpp and halving its height.
 959        */
 960       region_width = ALIGN(width, 64);
 961       region_height = ALIGN(ALIGN(height, 2) / 2, 64);
 962       region_cpp = format / 4;
 963    } else {
 964       region_width = width;
 965       region_height = height;
 966       region_cpp = format / 8;
 967    }
 968
 969    intelBuffer->region = intel_region_alloc(intelScreen,
 970                                             tiling,
 971                                             region_cpp,
 972                                             region_width,
 973                                             region_height,
 974                                             true);
 975
 976    if (intelBuffer->region == NULL) {
 977            FREE(intelBuffer);
 978            return NULL;
 979    }
 980
 981    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
 982
 983    intelBuffer->base.attachment = attachment;
 984    intelBuffer->base.cpp = intelBuffer->region->cpp;
 985    intelBuffer->base.pitch =
 986          intelBuffer->region->pitch * intelBuffer->region->cpp;
 987
 988    return &intelBuffer->base;
 989 }
 990
 991 static void
 992 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 993 {
 994    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
 995
 996    intel_region_release(&intelBuffer->region);
 997    free(intelBuffer);
 998 }
 999
1000
1001 const struct __DriverAPIRec driDriverAPI = {
1002    .InitScreen           = intelInitScreen2,
1003    .DestroyScreen        = intelDestroyScreen,
1004    .CreateContext        = intelCreateContext,
1005    .DestroyContext       = intelDestroyContext,
1006    .CreateBuffer         = intelCreateBuffer,
1007    .DestroyBuffer        = intelDestroyBuffer,
1008    .MakeCurrent          = intelMakeCurrent,
1009    .UnbindContext        = intelUnbindContext,
1010    .AllocateBuffer       = intelAllocateBuffer,
1011    .ReleaseBuffer        = intelReleaseBuffer
1012 };
1013
1014 /* This is the table of extensions that the loader will dlsym() for. */
1015 PUBLIC const __DRIextension *__driDriverExtensions[] = {
1016     &driCoreExtension.base,
1017     &driDRI2Extension.base,
1018     NULL
1019 };