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
  37 #include "utils.h"
  38 #include "xmlpool.h"
  39
  40 PUBLIC const char __driConfigOptions[] =
  41    DRI_CONF_BEGIN
  42    DRI_CONF_SECTION_PERFORMANCE
  43       DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
  44       /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
  45        * DRI_CONF_BO_REUSE_ALL
  46        */
  47       DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
  48          DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
  49             DRI_CONF_ENUM(0, "Disable buffer object reuse")
  50             DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
  51          DRI_CONF_DESC_END
  52       DRI_CONF_OPT_END
  53
  54       DRI_CONF_OPT_BEGIN(texture_tiling, bool, true)
  55          DRI_CONF_DESC(en, "Enable texture tiling")
  56       DRI_CONF_OPT_END
  57
  58       DRI_CONF_OPT_BEGIN(early_z, bool, false)
  59          DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
  60       DRI_CONF_OPT_END
  61
  62       DRI_CONF_OPT_BEGIN(fragment_shader, bool, true)
  63          DRI_CONF_DESC(en, "Enable limited ARB_fragment_shader support on 915/945.")
  64       DRI_CONF_OPT_END
  65
  66    DRI_CONF_SECTION_END
  67    DRI_CONF_SECTION_QUALITY
  68       DRI_CONF_FORCE_S3TC_ENABLE(false)
  69       DRI_CONF_ALLOW_LARGE_TEXTURES(2)
  70    DRI_CONF_SECTION_END
  71    DRI_CONF_SECTION_DEBUG
  72      DRI_CONF_NO_RAST(false)
  73      DRI_CONF_ALWAYS_FLUSH_BATCH(false)
  74      DRI_CONF_ALWAYS_FLUSH_CACHE(false)
  75
  76       DRI_CONF_OPT_BEGIN(stub_occlusion_query, bool, false)
  77          DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
  78       DRI_CONF_OPT_END
  79    DRI_CONF_SECTION_END
  80 DRI_CONF_END;
  81
  82 const GLuint __driNConfigOptions = 11;
  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_screen.h"
  90 #include "intel_tex.h"
  91 #include "intel_regions.h"
  92
  93 #include "i915_drm.h"
  94
  95 #ifdef USE_NEW_INTERFACE
  96 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
  97 #endif /*USE_NEW_INTERFACE */
  98
  99 static const __DRItexBufferExtension intelTexBufferExtension = {
 100     { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 101    intelSetTexBuffer,
 102    intelSetTexBuffer2,
 103 };
 104
 105 static void
 106 intelDRI2Flush(__DRIdrawable *drawable)
 107 {
 108    GET_CURRENT_CONTEXT(ctx);
 109    struct intel_context *intel = intel_context(ctx);
 110
 111    if (intel->gen < 4)
 112       INTEL_FIREVERTICES(intel);
 113
 114    intel->need_throttle = GL_TRUE;
 115
 116    if (intel->batch.used)
 117       intel_batchbuffer_flush(intel);
 118 }
 119
 120 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 121     { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
 122     intelDRI2Flush,
 123     dri2InvalidateDrawable,
 124 };
 125
 126 static __DRIimage *
 127 intel_create_image_from_name(__DRIscreen *screen,
 128                              int width, int height, int format,
 129                              int name, int pitch, void *loaderPrivate)
 130 {
 131     struct intel_screen *intelScreen = screen->private;
 132     __DRIimage *image;
 133     int cpp;
 134
 135     image = CALLOC(sizeof *image);
 136     if (image == NULL)
 137         return NULL;
 138
 139     switch (format) {
 140     case __DRI_IMAGE_FORMAT_RGB565:
 141        image->format = MESA_FORMAT_RGB565;
 142        image->internal_format = GL_RGB;
 143        image->data_type = GL_UNSIGNED_BYTE;
 144        break;
 145     case __DRI_IMAGE_FORMAT_XRGB8888:
 146        image->format = MESA_FORMAT_XRGB8888;
 147        image->internal_format = GL_RGB;
 148        image->data_type = GL_UNSIGNED_BYTE;
 149        break;
 150     case __DRI_IMAGE_FORMAT_ARGB8888:
 151        image->format = MESA_FORMAT_ARGB8888;
 152        image->internal_format = GL_RGBA;
 153        image->data_type = GL_UNSIGNED_BYTE;
 154        break;
 155     default:
 156        free(image);
 157        return NULL;
 158     }
 159
 160     image->data = loaderPrivate;
 161     cpp = _mesa_get_format_bytes(image->format);
 162
 163     image->region = intel_region_alloc_for_handle(intelScreen,
 164                                                   cpp, width, height,
 165                                                   pitch, name, "image");
 166     if (image->region == NULL) {
 167        FREE(image);
 168        return NULL;
 169     }
 170
 171     return image;
 172 }
 173
 174 static __DRIimage *
 175 intel_create_image_from_renderbuffer(__DRIcontext *context,
 176                                      int renderbuffer, void *loaderPrivate)
 177 {
 178    __DRIimage *image;
 179    struct intel_context *intel = context->driverPrivate;
 180    struct gl_renderbuffer *rb;
 181    struct intel_renderbuffer *irb;
 182
 183    rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
 184    if (!rb) {
 185       _mesa_error(&intel->ctx,
 186                   GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 187       return NULL;
 188    }
 189
 190    irb = intel_renderbuffer(rb);
 191    image = CALLOC(sizeof *image);
 192    if (image == NULL)
 193       return NULL;
 194
 195    image->internal_format = rb->InternalFormat;
 196    image->format = rb->Format;
 197    image->data_type = rb->DataType;
 198    image->data = loaderPrivate;
 199    intel_region_reference(&image->region, irb->region);
 200
 201    return image;
 202 }
 203
 204 static void
 205 intel_destroy_image(__DRIimage *image)
 206 {
 207     intel_region_release(&image->region);
 208     FREE(image);
 209 }
 210
 211 static __DRIimage *
 212 intel_create_image(__DRIscreen *screen,
 213                    int width, int height, int format,
 214                    unsigned int use,
 215                    void *loaderPrivate)
 216 {
 217    __DRIimage *image;
 218    struct intel_screen *intelScreen = screen->private;
 219    uint32_t tiling;
 220    int cpp;
 221
 222    tiling = I915_TILING_X;
 223    if (use & __DRI_IMAGE_USE_CURSOR) {
 224       if (width != 64 || height != 64)
 225          return NULL;
 226       tiling = I915_TILING_NONE;
 227    }
 228
 229    image = CALLOC(sizeof *image);
 230    if (image == NULL)
 231       return NULL;
 232
 233    switch (format) {
 234    case __DRI_IMAGE_FORMAT_RGB565:
 235       image->format = MESA_FORMAT_RGB565;
 236       image->internal_format = GL_RGB;
 237       image->data_type = GL_UNSIGNED_BYTE;
 238       break;
 239    case __DRI_IMAGE_FORMAT_XRGB8888:
 240       image->format = MESA_FORMAT_XRGB8888;
 241       image->internal_format = GL_RGB;
 242       image->data_type = GL_UNSIGNED_BYTE;
 243       break;
 244    case __DRI_IMAGE_FORMAT_ARGB8888:
 245       image->format = MESA_FORMAT_ARGB8888;
 246       image->internal_format = GL_RGBA;
 247       image->data_type = GL_UNSIGNED_BYTE;
 248       break;
 249    default:
 250       free(image);
 251       return NULL;
 252    }
 253
 254    image->data = loaderPrivate;
 255    cpp = _mesa_get_format_bytes(image->format);
 256
 257    image->region =
 258       intel_region_alloc(intelScreen, tiling,
 259                          cpp, width, height, GL_TRUE);
 260    if (image->region == NULL) {
 261       FREE(image);
 262       return NULL;
 263    }
 264
 265    return image;
 266 }
 267
 268 static GLboolean
 269 intel_query_image(__DRIimage *image, int attrib, int *value)
 270 {
 271    switch (attrib) {
 272    case __DRI_IMAGE_ATTRIB_STRIDE:
 273       *value = image->region->pitch * image->region->cpp;
 274       return GL_TRUE;
 275    case __DRI_IMAGE_ATTRIB_HANDLE:
 276       *value = image->region->buffer->handle;
 277       return GL_TRUE;
 278    case __DRI_IMAGE_ATTRIB_NAME:
 279       return intel_region_flink(image->region, (uint32_t *) value);
 280    default:
 281       return GL_FALSE;
 282    }
 283 }
 284
 285 static __DRIimage *
 286 intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
 287 {
 288    __DRIimage *image;
 289
 290    image = CALLOC(sizeof *image);
 291    if (image == NULL)
 292       return NULL;
 293
 294    image->region = NULL;
 295    intel_region_reference(&image->region, orig_image->region);
 296    if (image->region == NULL) {
 297       FREE(image);
 298       return NULL;
 299    }
 300
 301    image->internal_format = orig_image->internal_format;
 302    image->format          = orig_image->format;
 303    image->data_type       = orig_image->data_type;
 304    image->data            = loaderPrivate;
 305
 306    return image;
 307 }
 308
 309 static struct __DRIimageExtensionRec intelImageExtension = {
 310     { __DRI_IMAGE, __DRI_IMAGE_VERSION },
 311     intel_create_image_from_name,
 312     intel_create_image_from_renderbuffer,
 313     intel_destroy_image,
 314     intel_create_image,
 315     intel_query_image,
 316     intel_dup_image
 317 };
 318
 319 static const __DRIextension *intelScreenExtensions[] = {
 320     &driReadDrawableExtension,
 321     &intelTexBufferExtension.base,
 322     &intelFlushExtension.base,
 323     &intelImageExtension.base,
 324     &dri2ConfigQueryExtension.base,
 325     NULL
 326 };
 327
 328 static GLboolean
 329 intel_get_param(__DRIscreen *psp, int param, int *value)
 330 {
 331    int ret;
 332    struct drm_i915_getparam gp;
 333
 334    gp.param = param;
 335    gp.value = value;
 336
 337    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 338    if (ret) {
 339       if (ret != -EINVAL)
 340          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 341       return GL_FALSE;
 342    }
 343
 344    return GL_TRUE;
 345 }
 346
 347 static GLboolean
 348 intel_get_boolean(__DRIscreen *psp, int param)
 349 {
 350    int value = 0;
 351    return intel_get_param(psp, param, &value) && value;
 352 }
 353
 354 static void
 355 nop_callback(GLuint key, void *data, void *userData)
 356 {
 357 }
 358
 359 static void
 360 intelDestroyScreen(__DRIscreen * sPriv)
 361 {
 362    struct intel_screen *intelScreen = sPriv->private;
 363
 364    dri_bufmgr_destroy(intelScreen->bufmgr);
 365    driDestroyOptionInfo(&intelScreen->optionCache);
 366
 367    /* Some regions may still have references to them at this point, so
 368     * flush the hash table to prevent _mesa_DeleteHashTable() from
 369     * complaining about the hash not being empty; */
 370    _mesa_HashDeleteAll(intelScreen->named_regions, nop_callback, NULL);
 371    _mesa_DeleteHashTable(intelScreen->named_regions);
 372
 373    FREE(intelScreen);
 374    sPriv->private = NULL;
 375 }
 376
 377
 378 /**
 379  * This is called when we need to set up GL rendering to a new X window.
 380  */
 381 static GLboolean
 382 intelCreateBuffer(__DRIscreen * driScrnPriv,
 383                   __DRIdrawable * driDrawPriv,
 384                   const struct gl_config * mesaVis, GLboolean isPixmap)
 385 {
 386    struct intel_renderbuffer *rb;
 387    struct intel_screen *screen = (struct intel_screen*) driScrnPriv->private;
 388
 389    if (isPixmap) {
 390       return GL_FALSE;          /* not implemented */
 391    }
 392    else {
 393       gl_format rgbFormat;
 394
 395       struct gl_framebuffer *fb = CALLOC_STRUCT(gl_framebuffer);
 396
 397       if (!fb)
 398          return GL_FALSE;
 399
 400       _mesa_initialize_window_framebuffer(fb, mesaVis);
 401
 402       if (mesaVis->redBits == 5)
 403          rgbFormat = MESA_FORMAT_RGB565;
 404       else if (mesaVis->alphaBits == 0)
 405          rgbFormat = MESA_FORMAT_XRGB8888;
 406       else
 407          rgbFormat = MESA_FORMAT_ARGB8888;
 408
 409       /* setup the hardware-based renderbuffers */
 410       rb = intel_create_renderbuffer(rgbFormat);
 411       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base);
 412
 413       if (mesaVis->doubleBufferMode) {
 414          rb = intel_create_renderbuffer(rgbFormat);
 415          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base);
 416       }
 417
 418       /*
 419        * Assert here that the gl_config has an expected depth/stencil bit
 420        * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
 421        * which constructs the advertised configs.)
 422        */
 423       if (mesaVis->depthBits == 24) {
 424          assert(mesaVis->stencilBits == 8);
 425
 426          if (screen->hw_has_separate_stencil
 427              && screen->dri2_has_hiz != INTEL_DRI2_HAS_HIZ_FALSE) {
 428             /*
 429              * Request a separate stencil buffer even if we do not yet know if
 430              * the screen supports it. (See comments for
 431              * enum intel_dri2_has_hiz).
 432              */
 433             rb = intel_create_renderbuffer(MESA_FORMAT_X8_Z24);
 434             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base);
 435             rb = intel_create_renderbuffer(MESA_FORMAT_S8);
 436             _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base);
 437          } else {
 438             /*
 439              * Use combined depth/stencil. Note that the renderbuffer is
 440              * attached to two attachment points.
 441              */
 442             rb = intel_create_renderbuffer(MESA_FORMAT_S8_Z24);
 443             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base);
 444             _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base);
 445          }
 446       }
 447       else if (mesaVis->depthBits == 16) {
 448          assert(mesaVis->stencilBits == 0);
 449          /* just 16-bit depth buffer, no hw stencil */
 450          struct intel_renderbuffer *depthRb
 451             = intel_create_renderbuffer(MESA_FORMAT_Z16);
 452          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 453       }
 454       else {
 455          assert(mesaVis->depthBits == 0);
 456          assert(mesaVis->stencilBits == 0);
 457       }
 458
 459       /* now add any/all software-based renderbuffers we may need */
 460       _mesa_add_soft_renderbuffers(fb,
 461                                    GL_FALSE, /* never sw color */
 462                                    GL_FALSE, /* never sw depth */
 463                                    GL_FALSE, /* never sw stencil */
 464                                    mesaVis->accumRedBits > 0,
 465                                    GL_FALSE, /* never sw alpha */
 466                                    GL_FALSE  /* never sw aux */ );
 467       driDrawPriv->driverPrivate = fb;
 468
 469       return GL_TRUE;
 470    }
 471 }
 472
 473 static void
 474 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 475 {
 476     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 477
 478     _mesa_reference_framebuffer(&fb, NULL);
 479 }
 480
 481 /* There are probably better ways to do this, such as an
 482  * init-designated function to register chipids and createcontext
 483  * functions.
 484  */
 485 extern GLboolean i830CreateContext(const struct gl_config * mesaVis,
 486                                    __DRIcontext * driContextPriv,
 487                                    void *sharedContextPrivate);
 488
 489 extern GLboolean i915CreateContext(int api,
 490                                    const struct gl_config * mesaVis,
 491                                    __DRIcontext * driContextPriv,
 492                                    void *sharedContextPrivate);
 493 extern GLboolean brwCreateContext(int api,
 494                                   const struct gl_config * mesaVis,
 495                                   __DRIcontext * driContextPriv,
 496                                   void *sharedContextPrivate);
 497
 498 static GLboolean
 499 intelCreateContext(gl_api api,
 500                    const struct gl_config * mesaVis,
 501                    __DRIcontext * driContextPriv,
 502                    void *sharedContextPrivate)
 503 {
 504    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 505    struct intel_screen *intelScreen = sPriv->private;
 506
 507 #ifdef I915
 508    if (IS_9XX(intelScreen->deviceID)) {
 509       if (!IS_965(intelScreen->deviceID)) {
 510          return i915CreateContext(api, mesaVis, driContextPriv,
 511                                   sharedContextPrivate);
 512       }
 513    } else {
 514       intelScreen->no_vbo = GL_TRUE;
 515       return i830CreateContext(mesaVis, driContextPriv, sharedContextPrivate);
 516    }
 517 #else
 518    if (IS_965(intelScreen->deviceID))
 519       return brwCreateContext(api, mesaVis,
 520                               driContextPriv, sharedContextPrivate);
 521 #endif
 522    fprintf(stderr, "Unrecognized deviceID 0x%x\n", intelScreen->deviceID);
 523    return GL_FALSE;
 524 }
 525
 526 static GLboolean
 527 intel_init_bufmgr(struct intel_screen *intelScreen)
 528 {
 529    __DRIscreen *spriv = intelScreen->driScrnPriv;
 530    int num_fences = 0;
 531
 532    intelScreen->no_hw = (getenv("INTEL_NO_HW") != NULL ||
 533                          getenv("INTEL_DEVID_OVERRIDE") != NULL);
 534
 535    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 536    if (intelScreen->bufmgr == NULL) {
 537       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 538               __func__, __LINE__);
 539       return GL_FALSE;
 540    }
 541
 542    if (!intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences) ||
 543        num_fences == 0) {
 544       fprintf(stderr, "[%s: %u] Kernel 2.6.29 required.\n", __func__, __LINE__);
 545       return GL_FALSE;
 546    }
 547
 548    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 549
 550    intelScreen->named_regions = _mesa_NewHashTable();
 551
 552    intelScreen->relaxed_relocations = 0;
 553    intelScreen->relaxed_relocations |=
 554       intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA) << 0;
 555
 556    return GL_TRUE;
 557 }
 558
 559 /**
 560  * Override intel_screen.hw_has_hiz with environment variable INTEL_HIZ.
 561  *
 562  * Valid values for INTEL_HIZ are "0" and "1". If an invalid valid value is
 563  * encountered, a warning is emitted and INTEL_HIZ is ignored.
 564  */
 565 static void
 566 intel_override_hiz(struct intel_screen *intel)
 567 {
 568    const char *s = getenv("INTEL_HIZ");
 569    if (!s) {
 570       return;
 571    } else if (!strncmp("0", s, 2)) {
 572       intel->hw_has_hiz = false;
 573    } else if (!strncmp("1", s, 2)) {
 574       intel->hw_has_hiz = true;
 575    } else {
 576       fprintf(stderr,
 577               "warning: env variable INTEL_HIZ=\"%s\" has invalid value "
 578               "and is ignored", s);
 579    }
 580 }
 581
 582 /**
 583  * Override intel_screen.hw_has_separate_stencil with environment variable
 584  * INTEL_SEPARATE_STENCIL.
 585  *
 586  * Valid values for INTEL_SEPARATE_STENCIL are "0" and "1". If an invalid
 587  * valid value is encountered, a warning is emitted and INTEL_SEPARATE_STENCIL
 588  * is ignored.
 589  */
 590 static void
 591 intel_override_separate_stencil(struct intel_screen *screen)
 592 {
 593    const char *s = getenv("INTEL_SEPARATE_STENCIL");
 594    if (!s) {
 595       return;
 596    } else if (!strncmp("0", s, 2)) {
 597       screen->hw_has_separate_stencil = false;
 598    } else if (!strncmp("1", s, 2)) {
 599       screen->hw_has_separate_stencil = true;
 600    } else {
 601       fprintf(stderr,
 602               "warning: env variable INTEL_SEPARATE_STENCIL=\"%s\" has "
 603               "invalid value and is ignored", s);
 604    }
 605 }
 606
 607 /**
 608  * This is the driver specific part of the createNewScreen entry point.
 609  * Called when using DRI2.
 610  *
 611  * \return the struct gl_config supported by this driver
 612  */
 613 static const
 614 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
 615 {
 616    struct intel_screen *intelScreen;
 617    GLenum fb_format[3];
 618    GLenum fb_type[3];
 619    unsigned int api_mask;
 620    char *devid_override;
 621
 622    static const GLenum back_buffer_modes[] = {
 623        GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 624    };
 625    uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
 626    int color;
 627    __DRIconfig **configs = NULL;
 628
 629    /* Allocate the private area */
 630    intelScreen = CALLOC(sizeof *intelScreen);
 631    if (!intelScreen) {
 632       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
 633       return GL_FALSE;
 634    }
 635    /* parse information in __driConfigOptions */
 636    driParseOptionInfo(&intelScreen->optionCache,
 637                       __driConfigOptions, __driNConfigOptions);
 638
 639    intelScreen->driScrnPriv = psp;
 640    psp->private = (void *) intelScreen;
 641
 642    /* Determine chipset ID */
 643    if (!intel_get_param(psp, I915_PARAM_CHIPSET_ID,
 644                         &intelScreen->deviceID))
 645       return GL_FALSE;
 646
 647    /* Allow an override of the device ID for the purpose of making the
 648     * driver produce dumps for debugging of new chipset enablement.
 649     * This implies INTEL_NO_HW, to avoid programming your actual GPU
 650     * incorrectly.
 651     */
 652    devid_override = getenv("INTEL_DEVID_OVERRIDE");
 653    if (devid_override) {
 654       intelScreen->deviceID = strtod(devid_override, NULL);
 655    }
 656
 657    if (IS_GEN7(intelScreen->deviceID)) {
 658       intelScreen->gen = 7;
 659    } else if (IS_GEN6(intelScreen->deviceID)) {
 660       intelScreen->gen = 6;
 661    } else if (IS_GEN5(intelScreen->deviceID)) {
 662       intelScreen->gen = 5;
 663    } else if (IS_965(intelScreen->deviceID)) {
 664       intelScreen->gen = 4;
 665    } else if (IS_9XX(intelScreen->deviceID)) {
 666       intelScreen->gen = 3;
 667    } else {
 668       intelScreen->gen = 2;
 669    }
 670
 671    /*
 672     * FIXME: The hiz and separate stencil fields need updating once the
 673     * FIXME: features are completely implemented for a given chipset.
 674     */
 675    intelScreen->hw_has_separate_stencil = intelScreen->gen >= 7;
 676    intelScreen->hw_must_use_separate_stencil = intelScreen->gen >= 7;
 677    intelScreen->hw_has_hiz = false;
 678    intelScreen->dri2_has_hiz = INTEL_DRI2_HAS_HIZ_UNKNOWN;
 679
 680    intel_override_hiz(intelScreen);
 681    intel_override_separate_stencil(intelScreen);
 682
 683    api_mask = (1 << __DRI_API_OPENGL);
 684 #if FEATURE_ES1
 685    api_mask |= (1 << __DRI_API_GLES);
 686 #endif
 687 #if FEATURE_ES2
 688    api_mask |= (1 << __DRI_API_GLES2);
 689 #endif
 690
 691    if (IS_9XX(intelScreen->deviceID) || IS_965(intelScreen->deviceID))
 692       psp->api_mask = api_mask;
 693
 694    if (!intel_init_bufmgr(intelScreen))
 695        return GL_FALSE;
 696
 697    psp->extensions = intelScreenExtensions;
 698
 699    msaa_samples_array[0] = 0;
 700
 701    fb_format[0] = GL_RGB;
 702    fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
 703
 704    fb_format[1] = GL_BGR;
 705    fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
 706
 707    fb_format[2] = GL_BGRA;
 708    fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
 709
 710    depth_bits[0] = 0;
 711    stencil_bits[0] = 0;
 712
 713    /* Generate a rich set of useful configs that do not include an
 714     * accumulation buffer.
 715     */
 716    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 717       __DRIconfig **new_configs;
 718       int depth_factor;
 719
 720       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
 721        * buffer that has a diffferent number of bits per pixel than the color
 722        * buffer.  This isn't yet supported here.
 723        */
 724       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 725          depth_bits[1] = 16;
 726          stencil_bits[1] = 0;
 727       } else {
 728          depth_bits[1] = 24;
 729          stencil_bits[1] = 8;
 730       }
 731
 732       depth_factor = 2;
 733
 734       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 735                                      depth_bits,
 736                                      stencil_bits,
 737                                      depth_factor,
 738                                      back_buffer_modes,
 739                                      ARRAY_SIZE(back_buffer_modes),
 740                                      msaa_samples_array,
 741                                      ARRAY_SIZE(msaa_samples_array),
 742                                      GL_FALSE);
 743       if (configs == NULL)
 744          configs = new_configs;
 745       else
 746          configs = driConcatConfigs(configs, new_configs);
 747    }
 748
 749    /* Generate the minimum possible set of configs that include an
 750     * accumulation buffer.
 751     */
 752    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 753       __DRIconfig **new_configs;
 754
 755       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 756          depth_bits[0] = 16;
 757          stencil_bits[0] = 0;
 758       } else {
 759          depth_bits[0] = 24;
 760          stencil_bits[0] = 8;
 761       }
 762
 763       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 764                                      depth_bits, stencil_bits, 1,
 765                                      back_buffer_modes + 1, 1,
 766                                      msaa_samples_array, 1,
 767                                      GL_TRUE);
 768       if (configs == NULL)
 769          configs = new_configs;
 770       else
 771          configs = driConcatConfigs(configs, new_configs);
 772    }
 773
 774    if (configs == NULL) {
 775       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 776               __LINE__);
 777       return NULL;
 778    }
 779
 780    return (const __DRIconfig **)configs;
 781 }
 782
 783 struct intel_buffer {
 784    __DRIbuffer base;
 785    struct intel_region *region;
 786 };
 787
 788 /**
 789  * \brief Get tiling format for a DRI buffer.
 790  *
 791  * \param attachment is the buffer's attachmet point, such as
 792  *        __DRI_BUFFER_DEPTH.
 793  * \param out_tiling is the returned tiling format for buffer.
 794  * \return false if attachment is unrecognized or is incompatible with screen.
 795  */
 796 static bool
 797 intel_get_dri_buffer_tiling(struct intel_screen *screen,
 798                             uint32_t attachment,
 799                             uint32_t *out_tiling)
 800 {
 801    if (screen->gen < 4) {
 802       *out_tiling = I915_TILING_X;
 803       return true;
 804    }
 805
 806    switch (attachment) {
 807    case __DRI_BUFFER_DEPTH:
 808    case __DRI_BUFFER_DEPTH_STENCIL:
 809    case __DRI_BUFFER_HIZ:
 810       *out_tiling = I915_TILING_Y;
 811       return true;
 812    case __DRI_BUFFER_ACCUM:
 813    case __DRI_BUFFER_FRONT_LEFT:
 814    case __DRI_BUFFER_FRONT_RIGHT:
 815    case __DRI_BUFFER_BACK_LEFT:
 816    case __DRI_BUFFER_BACK_RIGHT:
 817    case __DRI_BUFFER_FAKE_FRONT_LEFT:
 818    case __DRI_BUFFER_FAKE_FRONT_RIGHT:
 819       *out_tiling = I915_TILING_X;
 820       return true;
 821    case __DRI_BUFFER_STENCIL:
 822       /* The stencil buffer is W tiled. However, we request from the kernel
 823        * a non-tiled buffer because the GTT is incapable of W fencing.
 824        */
 825       *out_tiling = I915_TILING_NONE;
 826       return true;
 827    default:
 828       if(unlikely(INTEL_DEBUG & DEBUG_DRI)) {
 829          fprintf(stderr, "error: %s: unrecognized DRI buffer attachment 0x%x\n",
 830                  __FUNCTION__, attachment);
 831       }
 832        return false;
 833    }
 834 }
 835
 836 static __DRIbuffer *
 837 intelAllocateBuffer(__DRIscreen *screen,
 838                     unsigned attachment, unsigned format,
 839                     int width, int height)
 840 {
 841    struct intel_buffer *intelBuffer;
 842    struct intel_screen *intelScreen = screen->private;
 843
 844    uint32_t tiling;
 845    uint32_t region_width;
 846    uint32_t region_height;
 847    uint32_t region_cpp;
 848
 849    bool ok = true;
 850
 851    ok = intel_get_dri_buffer_tiling(intelScreen, attachment, &tiling);
 852    if (!ok)
 853       return NULL;
 854
 855    intelBuffer = CALLOC(sizeof *intelBuffer);
 856    if (intelBuffer == NULL)
 857       return NULL;
 858
 859    if (attachment == __DRI_BUFFER_STENCIL) {
 860       /* The stencil buffer has quirky pitch requirements.  From Vol 2a,
 861        * 11.5.6.2.1 3DSTATE_STENCIL_BUFFER, field "Surface Pitch":
 862        *    The pitch must be set to 2x the value computed based on width, as
 863        *    the stencil buffer is stored with two rows interleaved.
 864        * To accomplish this, we resort to the nasty hack of doubling the
 865        * region's cpp and halving its height.
 866        */
 867       region_width = ALIGN(width, 64);
 868       region_height = ALIGN(ALIGN(height, 2) / 2, 64);
 869       region_cpp = format / 4;
 870    } else {
 871       region_width = width;
 872       region_height = height;
 873       region_cpp = format / 8;
 874    }
 875
 876    intelBuffer->region = intel_region_alloc(intelScreen,
 877                                             tiling,
 878                                             region_cpp,
 879                                             region_width,
 880                                             region_height,
 881                                             true);
 882
 883    if (intelBuffer->region == NULL) {
 884            FREE(intelBuffer);
 885            return NULL;
 886    }
 887
 888    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
 889
 890    intelBuffer->base.attachment = attachment;
 891    intelBuffer->base.cpp = intelBuffer->region->cpp;
 892    intelBuffer->base.pitch =
 893          intelBuffer->region->pitch * intelBuffer->region->cpp;
 894
 895    return &intelBuffer->base;
 896 }
 897
 898 static void
 899 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 900 {
 901    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
 902
 903    intel_region_release(&intelBuffer->region);
 904    free(intelBuffer);
 905 }
 906
 907
 908 const struct __DriverAPIRec driDriverAPI = {
 909    .DestroyScreen        = intelDestroyScreen,
 910    .CreateContext        = intelCreateContext,
 911    .DestroyContext       = intelDestroyContext,
 912    .CreateBuffer         = intelCreateBuffer,
 913    .DestroyBuffer        = intelDestroyBuffer,
 914    .MakeCurrent          = intelMakeCurrent,
 915    .UnbindContext        = intelUnbindContext,
 916    .InitScreen2          = intelInitScreen2,
 917    .AllocateBuffer       = intelAllocateBuffer,
 918    .ReleaseBuffer        = intelReleaseBuffer
 919 };
 920
 921 /* This is the table of extensions that the loader will dlsym() for. */
 922 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 923     &driCoreExtension.base,
 924     &driDRI2Extension.base,
 925     NULL
 926 };