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(early_z, bool, false)
  61          DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
  62       DRI_CONF_OPT_END
  63
  64       DRI_CONF_OPT_BEGIN(fragment_shader, bool, true)
  65          DRI_CONF_DESC(en, "Enable limited ARB_fragment_shader support on 915/945.")
  66       DRI_CONF_OPT_END
  67
  68    DRI_CONF_SECTION_END
  69    DRI_CONF_SECTION_QUALITY
  70       DRI_CONF_FORCE_S3TC_ENABLE(false)
  71       DRI_CONF_ALLOW_LARGE_TEXTURES(2)
  72    DRI_CONF_SECTION_END
  73    DRI_CONF_SECTION_DEBUG
  74      DRI_CONF_NO_RAST(false)
  75      DRI_CONF_ALWAYS_FLUSH_BATCH(false)
  76      DRI_CONF_ALWAYS_FLUSH_CACHE(false)
  77
  78       DRI_CONF_OPT_BEGIN(stub_occlusion_query, bool, false)
  79          DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
  80       DRI_CONF_OPT_END
  81
  82       DRI_CONF_OPT_BEGIN(shader_precompile, bool, false)
  83          DRI_CONF_DESC(en, "Perform code generation at shader link time.")
  84       DRI_CONF_OPT_END
  85    DRI_CONF_SECTION_END
  86 DRI_CONF_END;
  87
  88 const GLuint __driNConfigOptions = 12;
  89
  90 #include "intel_batchbuffer.h"
  91 #include "intel_buffers.h"
  92 #include "intel_bufmgr.h"
  93 #include "intel_chipset.h"
  94 #include "intel_fbo.h"
  95 #include "intel_mipmap_tree.h"
  96 #include "intel_screen.h"
  97 #include "intel_tex.h"
  98 #include "intel_regions.h"
  99
 100 #include "i915_drm.h"
 101
 102 #ifdef USE_NEW_INTERFACE
 103 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
 104 #endif /*USE_NEW_INTERFACE */
 105
 106 static const __DRItexBufferExtension intelTexBufferExtension = {
 107     { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 108    intelSetTexBuffer,
 109    intelSetTexBuffer2,
 110 };
 111
 112 static void
 113 intelDRI2Flush(__DRIdrawable *drawable)
 114 {
 115    GET_CURRENT_CONTEXT(ctx);
 116    struct intel_context *intel = intel_context(ctx);
 117    if (intel == NULL)
 118       return;
 119
 120    if (intel->gen < 4)
 121       INTEL_FIREVERTICES(intel);
 122
 123    intel->need_throttle = true;
 124
 125    if (intel->batch.used)
 126       intel_batchbuffer_flush(intel);
 127 }
 128
 129 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 130     { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
 131     intelDRI2Flush,
 132     dri2InvalidateDrawable,
 133 };
 134
 135 static __DRIimage *
 136 intel_create_image_from_name(__DRIscreen *screen,
 137                              int width, int height, int format,
 138                              int name, int pitch, void *loaderPrivate)
 139 {
 140     struct intel_screen *intelScreen = screen->driverPrivate;
 141     __DRIimage *image;
 142     int cpp;
 143
 144     image = CALLOC(sizeof *image);
 145     if (image == NULL)
 146         return NULL;
 147
 148     switch (format) {
 149     case __DRI_IMAGE_FORMAT_RGB565:
 150        image->format = MESA_FORMAT_RGB565;
 151        image->internal_format = GL_RGB;
 152        image->data_type = GL_UNSIGNED_BYTE;
 153        break;
 154     case __DRI_IMAGE_FORMAT_XRGB8888:
 155        image->format = MESA_FORMAT_XRGB8888;
 156        image->internal_format = GL_RGB;
 157        image->data_type = GL_UNSIGNED_BYTE;
 158        break;
 159     case __DRI_IMAGE_FORMAT_ARGB8888:
 160        image->format = MESA_FORMAT_ARGB8888;
 161        image->internal_format = GL_RGBA;
 162        image->data_type = GL_UNSIGNED_BYTE;
 163        break;
 164     case __DRI_IMAGE_FORMAT_ABGR8888:
 165        image->format = MESA_FORMAT_RGBA8888_REV;
 166        image->internal_format = GL_RGBA;
 167        image->data_type = GL_UNSIGNED_BYTE;
 168        break;
 169     default:
 170        free(image);
 171        return NULL;
 172     }
 173
 174     image->data = loaderPrivate;
 175     cpp = _mesa_get_format_bytes(image->format);
 176
 177     image->region = intel_region_alloc_for_handle(intelScreen,
 178                                                   cpp, width, height,
 179                                                   pitch, name, "image");
 180     if (image->region == NULL) {
 181        FREE(image);
 182        return NULL;
 183     }
 184
 185     return image;
 186 }
 187
 188 static __DRIimage *
 189 intel_create_image_from_renderbuffer(__DRIcontext *context,
 190                                      int renderbuffer, void *loaderPrivate)
 191 {
 192    __DRIimage *image;
 193    struct intel_context *intel = context->driverPrivate;
 194    struct gl_renderbuffer *rb;
 195    struct intel_renderbuffer *irb;
 196
 197    rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
 198    if (!rb) {
 199       _mesa_error(&intel->ctx,
 200                   GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 201       return NULL;
 202    }
 203
 204    irb = intel_renderbuffer(rb);
 205    image = CALLOC(sizeof *image);
 206    if (image == NULL)
 207       return NULL;
 208
 209    image->internal_format = rb->InternalFormat;
 210    image->format = rb->Format;
 211    image->data_type = rb->DataType;
 212    image->data = loaderPrivate;
 213    intel_region_reference(&image->region, irb->mt->region);
 214
 215    return image;
 216 }
 217
 218 static void
 219 intel_destroy_image(__DRIimage *image)
 220 {
 221     intel_region_release(&image->region);
 222     FREE(image);
 223 }
 224
 225 static __DRIimage *
 226 intel_create_image(__DRIscreen *screen,
 227                    int width, int height, int format,
 228                    unsigned int use,
 229                    void *loaderPrivate)
 230 {
 231    __DRIimage *image;
 232    struct intel_screen *intelScreen = screen->driverPrivate;
 233    uint32_t tiling;
 234    int cpp;
 235
 236    tiling = I915_TILING_X;
 237    if (use & __DRI_IMAGE_USE_CURSOR) {
 238       if (width != 64 || height != 64)
 239          return NULL;
 240       tiling = I915_TILING_NONE;
 241    }
 242
 243    image = CALLOC(sizeof *image);
 244    if (image == NULL)
 245       return NULL;
 246
 247    switch (format) {
 248    case __DRI_IMAGE_FORMAT_RGB565:
 249       image->format = MESA_FORMAT_RGB565;
 250       image->internal_format = GL_RGB;
 251       image->data_type = GL_UNSIGNED_BYTE;
 252       break;
 253    case __DRI_IMAGE_FORMAT_XRGB8888:
 254       image->format = MESA_FORMAT_XRGB8888;
 255       image->internal_format = GL_RGB;
 256       image->data_type = GL_UNSIGNED_BYTE;
 257       break;
 258    case __DRI_IMAGE_FORMAT_ARGB8888:
 259       image->format = MESA_FORMAT_ARGB8888;
 260       image->internal_format = GL_RGBA;
 261       image->data_type = GL_UNSIGNED_BYTE;
 262       break;
 263     case __DRI_IMAGE_FORMAT_ABGR8888:
 264        image->format = MESA_FORMAT_RGBA8888_REV;
 265        image->internal_format = GL_RGBA;
 266        image->data_type = GL_UNSIGNED_BYTE;
 267        break;
 268    default:
 269       free(image);
 270       return NULL;
 271    }
 272
 273    image->data = loaderPrivate;
 274    cpp = _mesa_get_format_bytes(image->format);
 275
 276    image->region =
 277       intel_region_alloc(intelScreen, tiling,
 278                          cpp, width, height, true);
 279    if (image->region == NULL) {
 280       FREE(image);
 281       return NULL;
 282    }
 283
 284    return image;
 285 }
 286
 287 static GLboolean
 288 intel_query_image(__DRIimage *image, int attrib, int *value)
 289 {
 290    switch (attrib) {
 291    case __DRI_IMAGE_ATTRIB_STRIDE:
 292       *value = image->region->pitch * image->region->cpp;
 293       return true;
 294    case __DRI_IMAGE_ATTRIB_HANDLE:
 295       *value = image->region->bo->handle;
 296       return true;
 297    case __DRI_IMAGE_ATTRIB_NAME:
 298       return intel_region_flink(image->region, (uint32_t *) value);
 299    default:
 300       return false;
 301    }
 302 }
 303
 304 static __DRIimage *
 305 intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
 306 {
 307    __DRIimage *image;
 308
 309    image = CALLOC(sizeof *image);
 310    if (image == NULL)
 311       return NULL;
 312
 313    intel_region_reference(&image->region, orig_image->region);
 314    if (image->region == NULL) {
 315       FREE(image);
 316       return NULL;
 317    }
 318
 319    image->internal_format = orig_image->internal_format;
 320    image->format          = orig_image->format;
 321    image->data_type       = orig_image->data_type;
 322    image->data            = loaderPrivate;
 323
 324    return image;
 325 }
 326
 327 static GLboolean
 328 intel_validate_usage(__DRIimage *image, unsigned int use)
 329 {
 330    if (use & __DRI_IMAGE_USE_CURSOR) {
 331       if (image->region->width != 64 || image->region->height != 64)
 332          return GL_FALSE;
 333    }
 334
 335    return GL_TRUE;
 336 }
 337
 338 static struct __DRIimageExtensionRec intelImageExtension = {
 339     { __DRI_IMAGE, 2 },
 340     intel_create_image_from_name,
 341     intel_create_image_from_renderbuffer,
 342     intel_destroy_image,
 343     intel_create_image,
 344     intel_query_image,
 345     intel_dup_image,
 346     intel_validate_usage
 347 };
 348
 349 static const __DRIextension *intelScreenExtensions[] = {
 350     &intelTexBufferExtension.base,
 351     &intelFlushExtension.base,
 352     &intelImageExtension.base,
 353     &dri2ConfigQueryExtension.base,
 354     NULL
 355 };
 356
 357 static bool
 358 intel_get_param(__DRIscreen *psp, int param, int *value)
 359 {
 360    int ret;
 361    struct drm_i915_getparam gp;
 362
 363    gp.param = param;
 364    gp.value = value;
 365
 366    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 367    if (ret) {
 368       if (ret != -EINVAL)
 369          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 370       return false;
 371    }
 372
 373    return true;
 374 }
 375
 376 static bool
 377 intel_get_boolean(__DRIscreen *psp, int param)
 378 {
 379    int value = 0;
 380    return intel_get_param(psp, param, &value) && value;
 381 }
 382
 383 static void
 384 nop_callback(GLuint key, void *data, void *userData)
 385 {
 386 }
 387
 388 static void
 389 intelDestroyScreen(__DRIscreen * sPriv)
 390 {
 391    struct intel_screen *intelScreen = sPriv->driverPrivate;
 392
 393    dri_bufmgr_destroy(intelScreen->bufmgr);
 394    driDestroyOptionInfo(&intelScreen->optionCache);
 395
 396    /* Some regions may still have references to them at this point, so
 397     * flush the hash table to prevent _mesa_DeleteHashTable() from
 398     * complaining about the hash not being empty; */
 399    _mesa_HashDeleteAll(intelScreen->named_regions, nop_callback, NULL);
 400    _mesa_DeleteHashTable(intelScreen->named_regions);
 401
 402    FREE(intelScreen);
 403    sPriv->driverPrivate = NULL;
 404 }
 405
 406
 407 /**
 408  * This is called when we need to set up GL rendering to a new X window.
 409  */
 410 static GLboolean
 411 intelCreateBuffer(__DRIscreen * driScrnPriv,
 412                   __DRIdrawable * driDrawPriv,
 413                   const struct gl_config * mesaVis, GLboolean isPixmap)
 414 {
 415    struct intel_renderbuffer *rb;
 416    struct intel_screen *screen = (struct intel_screen*) driScrnPriv->driverPrivate;
 417
 418    if (isPixmap) {
 419       return false;          /* not implemented */
 420    }
 421    else {
 422       gl_format rgbFormat;
 423
 424       struct gl_framebuffer *fb = CALLOC_STRUCT(gl_framebuffer);
 425
 426       if (!fb)
 427          return false;
 428
 429       _mesa_initialize_window_framebuffer(fb, mesaVis);
 430
 431       if (mesaVis->redBits == 5)
 432          rgbFormat = MESA_FORMAT_RGB565;
 433       else if (mesaVis->alphaBits == 0)
 434          rgbFormat = MESA_FORMAT_XRGB8888;
 435       else
 436          rgbFormat = MESA_FORMAT_ARGB8888;
 437
 438       /* setup the hardware-based renderbuffers */
 439       rb = intel_create_renderbuffer(rgbFormat);
 440       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base);
 441
 442       if (mesaVis->doubleBufferMode) {
 443          rb = intel_create_renderbuffer(rgbFormat);
 444          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base);
 445       }
 446
 447       /*
 448        * Assert here that the gl_config has an expected depth/stencil bit
 449        * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
 450        * which constructs the advertised configs.)
 451        */
 452       if (mesaVis->depthBits == 24) {
 453          assert(mesaVis->stencilBits == 8);
 454
 455          if (screen->hw_has_separate_stencil
 456              && screen->dri2_has_hiz != INTEL_DRI2_HAS_HIZ_FALSE) {
 457             /*
 458              * Request a separate stencil buffer even if we do not yet know if
 459              * the screen supports it. (See comments for
 460              * enum intel_dri2_has_hiz).
 461              */
 462             rb = intel_create_renderbuffer(MESA_FORMAT_X8_Z24);
 463             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base);
 464             rb = intel_create_renderbuffer(MESA_FORMAT_S8);
 465             _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base);
 466          } else {
 467             /*
 468              * Use combined depth/stencil. Note that the renderbuffer is
 469              * attached to two attachment points.
 470              */
 471             rb = intel_create_renderbuffer(MESA_FORMAT_S8_Z24);
 472             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base);
 473             _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base);
 474          }
 475       }
 476       else if (mesaVis->depthBits == 16) {
 477          assert(mesaVis->stencilBits == 0);
 478          /* just 16-bit depth buffer, no hw stencil */
 479          struct intel_renderbuffer *depthRb
 480             = intel_create_renderbuffer(MESA_FORMAT_Z16);
 481          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 482       }
 483       else {
 484          assert(mesaVis->depthBits == 0);
 485          assert(mesaVis->stencilBits == 0);
 486       }
 487
 488       /* now add any/all software-based renderbuffers we may need */
 489       _swrast_add_soft_renderbuffers(fb,
 490                                      false, /* never sw color */
 491                                      false, /* never sw depth */
 492                                      false, /* never sw stencil */
 493                                      mesaVis->accumRedBits > 0,
 494                                      false, /* never sw alpha */
 495                                      false  /* never sw aux */ );
 496       driDrawPriv->driverPrivate = fb;
 497
 498       return true;
 499    }
 500 }
 501
 502 static void
 503 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 504 {
 505     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 506
 507     _mesa_reference_framebuffer(&fb, NULL);
 508 }
 509
 510 /* There are probably better ways to do this, such as an
 511  * init-designated function to register chipids and createcontext
 512  * functions.
 513  */
 514 extern bool
 515 i830CreateContext(const struct gl_config *mesaVis,
 516                   __DRIcontext *driContextPriv,
 517                   void *sharedContextPrivate);
 518
 519 extern bool
 520 i915CreateContext(int api,
 521                   const struct gl_config *mesaVis,
 522                   __DRIcontext *driContextPriv,
 523                   void *sharedContextPrivate);
 524 extern bool
 525 brwCreateContext(int api,
 526                  const struct gl_config *mesaVis,
 527                  __DRIcontext *driContextPriv,
 528                  void *sharedContextPrivate);
 529
 530 static GLboolean
 531 intelCreateContext(gl_api api,
 532                    const struct gl_config * mesaVis,
 533                    __DRIcontext * driContextPriv,
 534                    unsigned major_version,
 535                    unsigned minor_version,
 536                    uint32_t flags,
 537                    unsigned *error,
 538                    void *sharedContextPrivate)
 539 {
 540    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 541    struct intel_screen *intelScreen = sPriv->driverPrivate;
 542    bool success = false;
 543
 544 #ifdef I915
 545    if (IS_9XX(intelScreen->deviceID)) {
 546       if (!IS_965(intelScreen->deviceID)) {
 547          success = i915CreateContext(api, mesaVis, driContextPriv,
 548                                      sharedContextPrivate);
 549       }
 550    } else {
 551       intelScreen->no_vbo = true;
 552       success = i830CreateContext(mesaVis, driContextPriv,
 553                                   sharedContextPrivate);
 554    }
 555 #else
 556    if (IS_965(intelScreen->deviceID))
 557       success = brwCreateContext(api, mesaVis,
 558                               driContextPriv,
 559                               sharedContextPrivate);
 560 #endif
 561
 562    if (success) {
 563       struct gl_context *ctx =
 564          (struct gl_context *) driContextPriv->driverPrivate;
 565
 566       _mesa_compute_version(ctx);
 567       if (ctx->VersionMajor > major_version
 568           || (ctx->VersionMajor == major_version
 569               && ctx->VersionMinor >= minor_version)) {
 570          *error = __DRI_CTX_ERROR_BAD_VERSION;
 571          return true;
 572       }
 573
 574       intelDestroyContext(driContextPriv);
 575    } else {
 576       *error = __DRI_CTX_ERROR_NO_MEMORY;
 577       fprintf(stderr, "Unrecognized deviceID 0x%x\n", intelScreen->deviceID);
 578    }
 579
 580    return false;
 581 }
 582
 583 static bool
 584 intel_init_bufmgr(struct intel_screen *intelScreen)
 585 {
 586    __DRIscreen *spriv = intelScreen->driScrnPriv;
 587    int num_fences = 0;
 588
 589    intelScreen->no_hw = (getenv("INTEL_NO_HW") != NULL ||
 590                          getenv("INTEL_DEVID_OVERRIDE") != NULL);
 591
 592    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 593    if (intelScreen->bufmgr == NULL) {
 594       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 595               __func__, __LINE__);
 596       return false;
 597    }
 598
 599    if (!intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences) ||
 600        num_fences == 0) {
 601       fprintf(stderr, "[%s: %u] Kernel 2.6.29 required.\n", __func__, __LINE__);
 602       return false;
 603    }
 604
 605    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 606
 607    intelScreen->named_regions = _mesa_NewHashTable();
 608
 609    intelScreen->relaxed_relocations = 0;
 610    intelScreen->relaxed_relocations |=
 611       intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA) << 0;
 612
 613    return true;
 614 }
 615
 616 /**
 617  * Override intel_screen.hw_has_hiz with environment variable INTEL_HIZ.
 618  *
 619  * Valid values for INTEL_HIZ are "0" and "1". If an invalid valid value is
 620  * encountered, a warning is emitted and INTEL_HIZ is ignored.
 621  */
 622 static void
 623 intel_override_hiz(struct intel_screen *intel)
 624 {
 625    const char *s = getenv("INTEL_HIZ");
 626    if (!s) {
 627       return;
 628    } else if (!strncmp("0", s, 2)) {
 629       intel->hw_has_hiz = false;
 630    } else if (!strncmp("1", s, 2)) {
 631       intel->hw_has_hiz = true;
 632    } else {
 633       fprintf(stderr,
 634               "warning: env variable INTEL_HIZ=\"%s\" has invalid value "
 635               "and is ignored", s);
 636    }
 637 }
 638
 639 /**
 640  * Override intel_screen.hw_has_separate_stencil with environment variable
 641  * INTEL_SEPARATE_STENCIL.
 642  *
 643  * Valid values for INTEL_SEPARATE_STENCIL are "0" and "1". If an invalid
 644  * valid value is encountered, a warning is emitted and INTEL_SEPARATE_STENCIL
 645  * is ignored.
 646  */
 647 static void
 648 intel_override_separate_stencil(struct intel_screen *screen)
 649 {
 650    const char *s = getenv("INTEL_SEPARATE_STENCIL");
 651    if (!s) {
 652       return;
 653    } else if (!strncmp("0", s, 2)) {
 654       screen->hw_has_separate_stencil = false;
 655    } else if (!strncmp("1", s, 2)) {
 656       screen->hw_has_separate_stencil = true;
 657    } else {
 658       fprintf(stderr,
 659               "warning: env variable INTEL_SEPARATE_STENCIL=\"%s\" has "
 660               "invalid value and is ignored", s);
 661    }
 662 }
 663
 664 /**
 665  * This is the driver specific part of the createNewScreen entry point.
 666  * Called when using DRI2.
 667  *
 668  * \return the struct gl_config supported by this driver
 669  */
 670 static const
 671 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
 672 {
 673    struct intel_screen *intelScreen;
 674    GLenum fb_format[3];
 675    GLenum fb_type[3];
 676    unsigned int api_mask;
 677    char *devid_override;
 678
 679    static const GLenum back_buffer_modes[] = {
 680        GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 681    };
 682    uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
 683    int color;
 684    __DRIconfig **configs = NULL;
 685
 686    /* Allocate the private area */
 687    intelScreen = CALLOC(sizeof *intelScreen);
 688    if (!intelScreen) {
 689       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
 690       return false;
 691    }
 692    /* parse information in __driConfigOptions */
 693    driParseOptionInfo(&intelScreen->optionCache,
 694                       __driConfigOptions, __driNConfigOptions);
 695
 696    intelScreen->driScrnPriv = psp;
 697    psp->driverPrivate = (void *) intelScreen;
 698
 699    /* Determine chipset ID */
 700    if (!intel_get_param(psp, I915_PARAM_CHIPSET_ID,
 701                         &intelScreen->deviceID))
 702       return false;
 703
 704    /* Allow an override of the device ID for the purpose of making the
 705     * driver produce dumps for debugging of new chipset enablement.
 706     * This implies INTEL_NO_HW, to avoid programming your actual GPU
 707     * incorrectly.
 708     */
 709    devid_override = getenv("INTEL_DEVID_OVERRIDE");
 710    if (devid_override) {
 711       intelScreen->deviceID = strtod(devid_override, NULL);
 712    }
 713
 714    intelScreen->kernel_has_gen7_sol_reset =
 715       intel_get_boolean(intelScreen->driScrnPriv,
 716                         I915_PARAM_HAS_GEN7_SOL_RESET);
 717
 718    if (IS_GEN7(intelScreen->deviceID)) {
 719       intelScreen->gen = 7;
 720    } else if (IS_GEN6(intelScreen->deviceID)) {
 721       intelScreen->gen = 6;
 722    } else if (IS_GEN5(intelScreen->deviceID)) {
 723       intelScreen->gen = 5;
 724    } else if (IS_965(intelScreen->deviceID)) {
 725       intelScreen->gen = 4;
 726    } else if (IS_9XX(intelScreen->deviceID)) {
 727       intelScreen->gen = 3;
 728    } else {
 729       intelScreen->gen = 2;
 730    }
 731
 732    intelScreen->hw_has_separate_stencil = intelScreen->gen >= 6;
 733    intelScreen->hw_must_use_separate_stencil = intelScreen->gen >= 7;
 734    intelScreen->hw_has_hiz = intelScreen->gen >= 6;
 735    intelScreen->dri2_has_hiz = INTEL_DRI2_HAS_HIZ_UNKNOWN;
 736
 737    intel_override_hiz(intelScreen);
 738    intel_override_separate_stencil(intelScreen);
 739
 740    api_mask = (1 << __DRI_API_OPENGL);
 741 #if FEATURE_ES1
 742    api_mask |= (1 << __DRI_API_GLES);
 743 #endif
 744 #if FEATURE_ES2
 745    api_mask |= (1 << __DRI_API_GLES2);
 746 #endif
 747
 748    if (IS_9XX(intelScreen->deviceID) || IS_965(intelScreen->deviceID))
 749       psp->api_mask = api_mask;
 750
 751    if (!intel_init_bufmgr(intelScreen))
 752        return false;
 753
 754    psp->extensions = intelScreenExtensions;
 755
 756    msaa_samples_array[0] = 0;
 757
 758    fb_format[0] = GL_RGB;
 759    fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
 760
 761    fb_format[1] = GL_BGR;
 762    fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
 763
 764    fb_format[2] = GL_BGRA;
 765    fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
 766
 767    depth_bits[0] = 0;
 768    stencil_bits[0] = 0;
 769
 770    /* Generate a rich set of useful configs that do not include an
 771     * accumulation buffer.
 772     */
 773    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 774       __DRIconfig **new_configs;
 775       int depth_factor;
 776
 777       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
 778        * buffer that has a diffferent number of bits per pixel than the color
 779        * buffer.  This isn't yet supported here.
 780        */
 781       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 782          depth_bits[1] = 16;
 783          stencil_bits[1] = 0;
 784       } else {
 785          depth_bits[1] = 24;
 786          stencil_bits[1] = 8;
 787       }
 788
 789       depth_factor = 2;
 790
 791       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 792                                      depth_bits,
 793                                      stencil_bits,
 794                                      depth_factor,
 795                                      back_buffer_modes,
 796                                      ARRAY_SIZE(back_buffer_modes),
 797                                      msaa_samples_array,
 798                                      ARRAY_SIZE(msaa_samples_array),
 799                                      false);
 800       if (configs == NULL)
 801          configs = new_configs;
 802       else
 803          configs = driConcatConfigs(configs, new_configs);
 804    }
 805
 806    /* Generate the minimum possible set of configs that include an
 807     * accumulation buffer.
 808     */
 809    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 810       __DRIconfig **new_configs;
 811
 812       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 813          depth_bits[0] = 16;
 814          stencil_bits[0] = 0;
 815       } else {
 816          depth_bits[0] = 24;
 817          stencil_bits[0] = 8;
 818       }
 819
 820       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 821                                      depth_bits, stencil_bits, 1,
 822                                      back_buffer_modes + 1, 1,
 823                                      msaa_samples_array, 1,
 824                                      true);
 825       if (configs == NULL)
 826          configs = new_configs;
 827       else
 828          configs = driConcatConfigs(configs, new_configs);
 829    }
 830
 831    if (configs == NULL) {
 832       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 833               __LINE__);
 834       return NULL;
 835    }
 836
 837    return (const __DRIconfig **)configs;
 838 }
 839
 840 struct intel_buffer {
 841    __DRIbuffer base;
 842    struct intel_region *region;
 843 };
 844
 845 /**
 846  * \brief Get tiling format for a DRI buffer.
 847  *
 848  * \param attachment is the buffer's attachmet point, such as
 849  *        __DRI_BUFFER_DEPTH.
 850  * \param out_tiling is the returned tiling format for buffer.
 851  * \return false if attachment is unrecognized or is incompatible with screen.
 852  */
 853 static bool
 854 intel_get_dri_buffer_tiling(struct intel_screen *screen,
 855                             uint32_t attachment,
 856                             uint32_t *out_tiling)
 857 {
 858    if (screen->gen < 4) {
 859       *out_tiling = I915_TILING_X;
 860       return true;
 861    }
 862
 863    switch (attachment) {
 864    case __DRI_BUFFER_DEPTH:
 865    case __DRI_BUFFER_DEPTH_STENCIL:
 866    case __DRI_BUFFER_HIZ:
 867       *out_tiling = I915_TILING_Y;
 868       return true;
 869    case __DRI_BUFFER_ACCUM:
 870    case __DRI_BUFFER_FRONT_LEFT:
 871    case __DRI_BUFFER_FRONT_RIGHT:
 872    case __DRI_BUFFER_BACK_LEFT:
 873    case __DRI_BUFFER_BACK_RIGHT:
 874    case __DRI_BUFFER_FAKE_FRONT_LEFT:
 875    case __DRI_BUFFER_FAKE_FRONT_RIGHT:
 876       *out_tiling = I915_TILING_X;
 877       return true;
 878    case __DRI_BUFFER_STENCIL:
 879       /* The stencil buffer is W tiled. However, we request from the kernel
 880        * a non-tiled buffer because the GTT is incapable of W fencing.
 881        */
 882       *out_tiling = I915_TILING_NONE;
 883       return true;
 884    default:
 885       if(unlikely(INTEL_DEBUG & DEBUG_DRI)) {
 886          fprintf(stderr, "error: %s: unrecognized DRI buffer attachment 0x%x\n",
 887                  __FUNCTION__, attachment);
 888       }
 889        return false;
 890    }
 891 }
 892
 893 static __DRIbuffer *
 894 intelAllocateBuffer(__DRIscreen *screen,
 895                     unsigned attachment, unsigned format,
 896                     int width, int height)
 897 {
 898    struct intel_buffer *intelBuffer;
 899    struct intel_screen *intelScreen = screen->driverPrivate;
 900
 901    uint32_t tiling;
 902    uint32_t region_width;
 903    uint32_t region_height;
 904    uint32_t region_cpp;
 905
 906    bool ok = true;
 907
 908    ok = intel_get_dri_buffer_tiling(intelScreen, attachment, &tiling);
 909    if (!ok)
 910       return NULL;
 911
 912    intelBuffer = CALLOC(sizeof *intelBuffer);
 913    if (intelBuffer == NULL)
 914       return NULL;
 915
 916    if (attachment == __DRI_BUFFER_STENCIL) {
 917       /* The stencil buffer has quirky pitch requirements.  From Vol 2a,
 918        * 11.5.6.2.1 3DSTATE_STENCIL_BUFFER, field "Surface Pitch":
 919        *    The pitch must be set to 2x the value computed based on width, as
 920        *    the stencil buffer is stored with two rows interleaved.
 921        * To accomplish this, we resort to the nasty hack of doubling the
 922        * region's cpp and halving its height.
 923        */
 924       region_width = ALIGN(width, 64);
 925       region_height = ALIGN(ALIGN(height, 2) / 2, 64);
 926       region_cpp = format / 4;
 927    } else {
 928       region_width = width;
 929       region_height = height;
 930       region_cpp = format / 8;
 931    }
 932
 933    intelBuffer->region = intel_region_alloc(intelScreen,
 934                                             tiling,
 935                                             region_cpp,
 936                                             region_width,
 937                                             region_height,
 938                                             true);
 939
 940    if (intelBuffer->region == NULL) {
 941            FREE(intelBuffer);
 942            return NULL;
 943    }
 944
 945    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
 946
 947    intelBuffer->base.attachment = attachment;
 948    intelBuffer->base.cpp = intelBuffer->region->cpp;
 949    intelBuffer->base.pitch =
 950          intelBuffer->region->pitch * intelBuffer->region->cpp;
 951
 952    return &intelBuffer->base;
 953 }
 954
 955 static void
 956 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 957 {
 958    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
 959
 960    intel_region_release(&intelBuffer->region);
 961    free(intelBuffer);
 962 }
 963
 964
 965 const struct __DriverAPIRec driDriverAPI = {
 966    .InitScreen           = intelInitScreen2,
 967    .DestroyScreen        = intelDestroyScreen,
 968    .CreateContext        = intelCreateContext,
 969    .DestroyContext       = intelDestroyContext,
 970    .CreateBuffer         = intelCreateBuffer,
 971    .DestroyBuffer        = intelDestroyBuffer,
 972    .MakeCurrent          = intelMakeCurrent,
 973    .UnbindContext        = intelUnbindContext,
 974    .AllocateBuffer       = intelAllocateBuffer,
 975    .ReleaseBuffer        = intelReleaseBuffer
 976 };
 977
 978 /* This is the table of extensions that the loader will dlsym() for. */
 979 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 980     &driCoreExtension.base,
 981     &driDRI2Extension.base,
 982     NULL
 983 };