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 struct __DRIimageExtensionRec intelImageExtension = {
 286     { __DRI_IMAGE, __DRI_IMAGE_VERSION },
 287     intel_create_image_from_name,
 288     intel_create_image_from_renderbuffer,
 289     intel_destroy_image,
 290     intel_create_image,
 291     intel_query_image
 292 };
 293
 294 static const __DRIextension *intelScreenExtensions[] = {
 295     &driReadDrawableExtension,
 296     &intelTexBufferExtension.base,
 297     &intelFlushExtension.base,
 298     &intelImageExtension.base,
 299     &dri2ConfigQueryExtension.base,
 300     NULL
 301 };
 302
 303 static GLboolean
 304 intel_get_param(__DRIscreen *psp, int param, int *value)
 305 {
 306    int ret;
 307    struct drm_i915_getparam gp;
 308
 309    gp.param = param;
 310    gp.value = value;
 311
 312    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 313    if (ret) {
 314       if (ret != -EINVAL)
 315          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 316       return GL_FALSE;
 317    }
 318
 319    return GL_TRUE;
 320 }
 321
 322 static GLboolean
 323 intel_get_boolean(__DRIscreen *psp, int param)
 324 {
 325    int value = 0;
 326    return intel_get_param(psp, param, &value) && value;
 327 }
 328
 329 static void
 330 nop_callback(GLuint key, void *data, void *userData)
 331 {
 332 }
 333
 334 static void
 335 intelDestroyScreen(__DRIscreen * sPriv)
 336 {
 337    struct intel_screen *intelScreen = sPriv->private;
 338
 339    dri_bufmgr_destroy(intelScreen->bufmgr);
 340    driDestroyOptionInfo(&intelScreen->optionCache);
 341
 342    /* Some regions may still have references to them at this point, so
 343     * flush the hash table to prevent _mesa_DeleteHashTable() from
 344     * complaining about the hash not being empty; */
 345    _mesa_HashDeleteAll(intelScreen->named_regions, nop_callback, NULL);
 346    _mesa_DeleteHashTable(intelScreen->named_regions);
 347
 348    FREE(intelScreen);
 349    sPriv->private = NULL;
 350 }
 351
 352
 353 /**
 354  * This is called when we need to set up GL rendering to a new X window.
 355  */
 356 static GLboolean
 357 intelCreateBuffer(__DRIscreen * driScrnPriv,
 358                   __DRIdrawable * driDrawPriv,
 359                   const struct gl_config * mesaVis, GLboolean isPixmap)
 360 {
 361    struct intel_renderbuffer *rb;
 362    struct intel_screen *screen = (struct intel_screen*) driScrnPriv->private;
 363
 364    if (isPixmap) {
 365       return GL_FALSE;          /* not implemented */
 366    }
 367    else {
 368       gl_format rgbFormat;
 369
 370       struct gl_framebuffer *fb = CALLOC_STRUCT(gl_framebuffer);
 371
 372       if (!fb)
 373          return GL_FALSE;
 374
 375       _mesa_initialize_window_framebuffer(fb, mesaVis);
 376
 377       if (mesaVis->redBits == 5)
 378          rgbFormat = MESA_FORMAT_RGB565;
 379       else if (mesaVis->alphaBits == 0)
 380          rgbFormat = MESA_FORMAT_XRGB8888;
 381       else
 382          rgbFormat = MESA_FORMAT_ARGB8888;
 383
 384       /* setup the hardware-based renderbuffers */
 385       rb = intel_create_renderbuffer(rgbFormat);
 386       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base);
 387
 388       if (mesaVis->doubleBufferMode) {
 389          rb = intel_create_renderbuffer(rgbFormat);
 390          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base);
 391       }
 392
 393       /*
 394        * Assert here that the gl_config has an expected depth/stencil bit
 395        * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
 396        * which constructs the advertised configs.)
 397        */
 398       if (mesaVis->depthBits == 24) {
 399          assert(mesaVis->stencilBits == 8);
 400
 401          if (screen->hw_has_separate_stencil
 402              && screen->dri2_has_hiz != INTEL_DRI2_HAS_HIZ_FALSE) {
 403             /*
 404              * Request a separate stencil buffer even if we do not yet know if
 405              * the screen supports it. (See comments for
 406              * enum intel_dri2_has_hiz).
 407              */
 408             rb = intel_create_renderbuffer(MESA_FORMAT_X8_Z24);
 409             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base);
 410             rb = intel_create_renderbuffer(MESA_FORMAT_S8);
 411             _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base);
 412          } else {
 413             /*
 414              * Use combined depth/stencil. Note that the renderbuffer is
 415              * attached to two attachment points.
 416              */
 417             rb = intel_create_renderbuffer(MESA_FORMAT_S8_Z24);
 418             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base);
 419             _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base);
 420          }
 421       }
 422       else if (mesaVis->depthBits == 16) {
 423          assert(mesaVis->stencilBits == 0);
 424          /* just 16-bit depth buffer, no hw stencil */
 425          struct intel_renderbuffer *depthRb
 426             = intel_create_renderbuffer(MESA_FORMAT_Z16);
 427          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 428       }
 429       else {
 430          assert(mesaVis->depthBits == 0);
 431          assert(mesaVis->stencilBits == 0);
 432       }
 433
 434       /* now add any/all software-based renderbuffers we may need */
 435       _mesa_add_soft_renderbuffers(fb,
 436                                    GL_FALSE, /* never sw color */
 437                                    GL_FALSE, /* never sw depth */
 438                                    GL_FALSE, /* never sw stencil */
 439                                    mesaVis->accumRedBits > 0,
 440                                    GL_FALSE, /* never sw alpha */
 441                                    GL_FALSE  /* never sw aux */ );
 442       driDrawPriv->driverPrivate = fb;
 443
 444       return GL_TRUE;
 445    }
 446 }
 447
 448 static void
 449 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 450 {
 451     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 452
 453     _mesa_reference_framebuffer(&fb, NULL);
 454 }
 455
 456 /* There are probably better ways to do this, such as an
 457  * init-designated function to register chipids and createcontext
 458  * functions.
 459  */
 460 extern GLboolean i830CreateContext(const struct gl_config * mesaVis,
 461                                    __DRIcontext * driContextPriv,
 462                                    void *sharedContextPrivate);
 463
 464 extern GLboolean i915CreateContext(int api,
 465                                    const struct gl_config * mesaVis,
 466                                    __DRIcontext * driContextPriv,
 467                                    void *sharedContextPrivate);
 468 extern GLboolean brwCreateContext(int api,
 469                                   const struct gl_config * mesaVis,
 470                                   __DRIcontext * driContextPriv,
 471                                   void *sharedContextPrivate);
 472
 473 static GLboolean
 474 intelCreateContext(gl_api api,
 475                    const struct gl_config * mesaVis,
 476                    __DRIcontext * driContextPriv,
 477                    void *sharedContextPrivate)
 478 {
 479    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 480    struct intel_screen *intelScreen = sPriv->private;
 481
 482 #ifdef I915
 483    if (IS_9XX(intelScreen->deviceID)) {
 484       if (!IS_965(intelScreen->deviceID)) {
 485          return i915CreateContext(api, mesaVis, driContextPriv,
 486                                   sharedContextPrivate);
 487       }
 488    } else {
 489       intelScreen->no_vbo = GL_TRUE;
 490       return i830CreateContext(mesaVis, driContextPriv, sharedContextPrivate);
 491    }
 492 #else
 493    if (IS_965(intelScreen->deviceID))
 494       return brwCreateContext(api, mesaVis,
 495                               driContextPriv, sharedContextPrivate);
 496 #endif
 497    fprintf(stderr, "Unrecognized deviceID 0x%x\n", intelScreen->deviceID);
 498    return GL_FALSE;
 499 }
 500
 501 static GLboolean
 502 intel_init_bufmgr(struct intel_screen *intelScreen)
 503 {
 504    __DRIscreen *spriv = intelScreen->driScrnPriv;
 505    int num_fences = 0;
 506
 507    intelScreen->no_hw = (getenv("INTEL_NO_HW") != NULL ||
 508                          getenv("INTEL_DEVID_OVERRIDE") != NULL);
 509
 510    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 511    if (intelScreen->bufmgr == NULL) {
 512       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 513               __func__, __LINE__);
 514       return GL_FALSE;
 515    }
 516
 517    if (!intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences) ||
 518        num_fences == 0) {
 519       fprintf(stderr, "[%s: %u] Kernel 2.6.29 required.\n", __func__, __LINE__);
 520       return GL_FALSE;
 521    }
 522
 523    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 524
 525    intelScreen->named_regions = _mesa_NewHashTable();
 526
 527    intelScreen->relaxed_relocations = 0;
 528    intelScreen->relaxed_relocations |=
 529       intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA) << 0;
 530
 531    return GL_TRUE;
 532 }
 533
 534 /**
 535  * Override intel_screen.hw_has_hiz with environment variable INTEL_HIZ.
 536  *
 537  * Valid values for INTEL_HIZ are "0" and "1". If an invalid valid value is
 538  * encountered, a warning is emitted and INTEL_HIZ is ignored.
 539  */
 540 static void
 541 intel_override_hiz(struct intel_screen *intel)
 542 {
 543    const char *s = getenv("INTEL_HIZ");
 544    if (!s) {
 545       return;
 546    } else if (!strncmp("0", s, 2)) {
 547       intel->hw_has_hiz = false;
 548    } else if (!strncmp("1", s, 2)) {
 549       intel->hw_has_hiz = true;
 550    } else {
 551       fprintf(stderr,
 552               "warning: env variable INTEL_HIZ=\"%s\" has invalid value "
 553               "and is ignored", s);
 554    }
 555 }
 556
 557 /**
 558  * Override intel_screen.hw_has_separate_stencil with environment variable
 559  * INTEL_SEPARATE_STENCIL.
 560  *
 561  * Valid values for INTEL_SEPARATE_STENCIL are "0" and "1". If an invalid
 562  * valid value is encountered, a warning is emitted and INTEL_SEPARATE_STENCIL
 563  * is ignored.
 564  */
 565 static void
 566 intel_override_separate_stencil(struct intel_screen *screen)
 567 {
 568    const char *s = getenv("INTEL_SEPARATE_STENCIL");
 569    if (!s) {
 570       return;
 571    } else if (!strncmp("0", s, 2)) {
 572       screen->hw_has_separate_stencil = false;
 573    } else if (!strncmp("1", s, 2)) {
 574       screen->hw_has_separate_stencil = true;
 575    } else {
 576       fprintf(stderr,
 577               "warning: env variable INTEL_SEPARATE_STENCIL=\"%s\" has "
 578               "invalid value and is ignored", s);
 579    }
 580 }
 581
 582 /**
 583  * This is the driver specific part of the createNewScreen entry point.
 584  * Called when using DRI2.
 585  *
 586  * \return the struct gl_config supported by this driver
 587  */
 588 static const
 589 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
 590 {
 591    struct intel_screen *intelScreen;
 592    GLenum fb_format[3];
 593    GLenum fb_type[3];
 594    unsigned int api_mask;
 595    char *devid_override;
 596
 597    static const GLenum back_buffer_modes[] = {
 598        GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 599    };
 600    uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
 601    int color;
 602    __DRIconfig **configs = NULL;
 603
 604    /* Allocate the private area */
 605    intelScreen = CALLOC(sizeof *intelScreen);
 606    if (!intelScreen) {
 607       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
 608       return GL_FALSE;
 609    }
 610    /* parse information in __driConfigOptions */
 611    driParseOptionInfo(&intelScreen->optionCache,
 612                       __driConfigOptions, __driNConfigOptions);
 613
 614    intelScreen->driScrnPriv = psp;
 615    psp->private = (void *) intelScreen;
 616
 617    /* Determine chipset ID */
 618    if (!intel_get_param(psp, I915_PARAM_CHIPSET_ID,
 619                         &intelScreen->deviceID))
 620       return GL_FALSE;
 621
 622    /* Allow an override of the device ID for the purpose of making the
 623     * driver produce dumps for debugging of new chipset enablement.
 624     * This implies INTEL_NO_HW, to avoid programming your actual GPU
 625     * incorrectly.
 626     */
 627    devid_override = getenv("INTEL_DEVID_OVERRIDE");
 628    if (devid_override) {
 629       intelScreen->deviceID = strtod(devid_override, NULL);
 630    }
 631
 632    if (IS_GEN7(intelScreen->deviceID)) {
 633       intelScreen->gen = 7;
 634    } else if (IS_GEN6(intelScreen->deviceID)) {
 635       intelScreen->gen = 6;
 636    } else if (IS_GEN5(intelScreen->deviceID)) {
 637       intelScreen->gen = 5;
 638    } else if (IS_965(intelScreen->deviceID)) {
 639       intelScreen->gen = 4;
 640    } else if (IS_9XX(intelScreen->deviceID)) {
 641       intelScreen->gen = 3;
 642    } else {
 643       intelScreen->gen = 2;
 644    }
 645
 646    /*
 647     * FIXME: The hiz and separate stencil fields need updating once the
 648     * FIXME: features are completely implemented for a given chipset.
 649     */
 650    intelScreen->hw_has_separate_stencil = intelScreen->gen >= 7;
 651    intelScreen->hw_must_use_separate_stencil = intelScreen->gen >= 7;
 652    intelScreen->hw_has_hiz = false;
 653    intelScreen->dri2_has_hiz = INTEL_DRI2_HAS_HIZ_UNKNOWN;
 654
 655    intel_override_hiz(intelScreen);
 656    intel_override_separate_stencil(intelScreen);
 657
 658    api_mask = (1 << __DRI_API_OPENGL);
 659 #if FEATURE_ES1
 660    api_mask |= (1 << __DRI_API_GLES);
 661 #endif
 662 #if FEATURE_ES2
 663    api_mask |= (1 << __DRI_API_GLES2);
 664 #endif
 665
 666    if (IS_9XX(intelScreen->deviceID) || IS_965(intelScreen->deviceID))
 667       psp->api_mask = api_mask;
 668
 669    if (!intel_init_bufmgr(intelScreen))
 670        return GL_FALSE;
 671
 672    psp->extensions = intelScreenExtensions;
 673
 674    msaa_samples_array[0] = 0;
 675
 676    fb_format[0] = GL_RGB;
 677    fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
 678
 679    fb_format[1] = GL_BGR;
 680    fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
 681
 682    fb_format[2] = GL_BGRA;
 683    fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
 684
 685    depth_bits[0] = 0;
 686    stencil_bits[0] = 0;
 687
 688    /* Generate a rich set of useful configs that do not include an
 689     * accumulation buffer.
 690     */
 691    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 692       __DRIconfig **new_configs;
 693       int depth_factor;
 694
 695       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
 696        * buffer that has a diffferent number of bits per pixel than the color
 697        * buffer.  This isn't yet supported here.
 698        */
 699       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 700          depth_bits[1] = 16;
 701          stencil_bits[1] = 0;
 702       } else {
 703          depth_bits[1] = 24;
 704          stencil_bits[1] = 8;
 705       }
 706
 707       depth_factor = 2;
 708
 709       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 710                                      depth_bits,
 711                                      stencil_bits,
 712                                      depth_factor,
 713                                      back_buffer_modes,
 714                                      ARRAY_SIZE(back_buffer_modes),
 715                                      msaa_samples_array,
 716                                      ARRAY_SIZE(msaa_samples_array),
 717                                      GL_FALSE);
 718       if (configs == NULL)
 719          configs = new_configs;
 720       else
 721          configs = driConcatConfigs(configs, new_configs);
 722    }
 723
 724    /* Generate the minimum possible set of configs that include an
 725     * accumulation buffer.
 726     */
 727    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 728       __DRIconfig **new_configs;
 729
 730       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 731          depth_bits[0] = 16;
 732          stencil_bits[0] = 0;
 733       } else {
 734          depth_bits[0] = 24;
 735          stencil_bits[0] = 8;
 736       }
 737
 738       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 739                                      depth_bits, stencil_bits, 1,
 740                                      back_buffer_modes + 1, 1,
 741                                      msaa_samples_array, 1,
 742                                      GL_TRUE);
 743       if (configs == NULL)
 744          configs = new_configs;
 745       else
 746          configs = driConcatConfigs(configs, new_configs);
 747    }
 748
 749    if (configs == NULL) {
 750       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 751               __LINE__);
 752       return NULL;
 753    }
 754
 755    return (const __DRIconfig **)configs;
 756 }
 757
 758 struct intel_buffer {
 759    __DRIbuffer base;
 760    struct intel_region *region;
 761 };
 762
 763 static __DRIbuffer *
 764 intelAllocateBuffer(__DRIscreen *screen,
 765                     unsigned attachment, unsigned format,
 766                     int width, int height)
 767 {
 768    struct intel_buffer *intelBuffer;
 769    struct intel_screen *intelScreen = screen->private;
 770    uint32_t tiling;
 771
 772    intelBuffer = CALLOC(sizeof *intelBuffer);
 773    if (intelBuffer == NULL)
 774       return NULL;
 775
 776    if ((attachment == __DRI_BUFFER_DEPTH ||
 777         attachment == __DRI_BUFFER_STENCIL ||
 778         attachment == __DRI_BUFFER_DEPTH_STENCIL) &&
 779        intelScreen->gen >= 4)
 780       tiling = I915_TILING_Y;
 781    else
 782       tiling = I915_TILING_X;
 783
 784    intelBuffer->region = intel_region_alloc(intelScreen, tiling,
 785                                             format / 8, width, height, GL_TRUE);
 786
 787    if (intelBuffer->region == NULL) {
 788            FREE(intelBuffer);
 789            return NULL;
 790    }
 791
 792    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
 793
 794    intelBuffer->base.attachment = attachment;
 795    intelBuffer->base.cpp = intelBuffer->region->cpp;
 796    intelBuffer->base.pitch =
 797          intelBuffer->region->pitch * intelBuffer->region->cpp;
 798
 799    return &intelBuffer->base;
 800 }
 801
 802 static void
 803 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 804 {
 805    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
 806
 807    intel_region_release(&intelBuffer->region);
 808    free(intelBuffer);
 809 }
 810
 811
 812 const struct __DriverAPIRec driDriverAPI = {
 813    .DestroyScreen        = intelDestroyScreen,
 814    .CreateContext        = intelCreateContext,
 815    .DestroyContext       = intelDestroyContext,
 816    .CreateBuffer         = intelCreateBuffer,
 817    .DestroyBuffer        = intelDestroyBuffer,
 818    .MakeCurrent          = intelMakeCurrent,
 819    .UnbindContext        = intelUnbindContext,
 820    .InitScreen2          = intelInitScreen2,
 821    .AllocateBuffer       = intelAllocateBuffer,
 822    .ReleaseBuffer        = intelReleaseBuffer
 823 };
 824
 825 /* This is the table of extensions that the loader will dlsym() for. */
 826 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 827     &driCoreExtension.base,
 828     &driDRI2Extension.base,
 829     NULL
 830 };