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 "swrast/s_renderbuffer.h"
  37
  38 #include "utils.h"
  39 #include "xmlpool.h"
  40
  41 PUBLIC const char __driConfigOptions[] =
  42    DRI_CONF_BEGIN
  43    DRI_CONF_SECTION_PERFORMANCE
  44       DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
  45       /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
  46        * DRI_CONF_BO_REUSE_ALL
  47        */
  48       DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
  49          DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
  50             DRI_CONF_ENUM(0, "Disable buffer object reuse")
  51             DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
  52          DRI_CONF_DESC_END
  53       DRI_CONF_OPT_END
  54
  55       DRI_CONF_OPT_BEGIN(texture_tiling, bool, true)
  56          DRI_CONF_DESC(en, "Enable texture tiling")
  57       DRI_CONF_OPT_END
  58
  59       DRI_CONF_OPT_BEGIN(early_z, bool, false)
  60          DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
  61       DRI_CONF_OPT_END
  62
  63       DRI_CONF_OPT_BEGIN(fragment_shader, bool, true)
  64          DRI_CONF_DESC(en, "Enable limited ARB_fragment_shader support on 915/945.")
  65       DRI_CONF_OPT_END
  66
  67    DRI_CONF_SECTION_END
  68    DRI_CONF_SECTION_QUALITY
  69       DRI_CONF_FORCE_S3TC_ENABLE(false)
  70       DRI_CONF_ALLOW_LARGE_TEXTURES(2)
  71    DRI_CONF_SECTION_END
  72    DRI_CONF_SECTION_DEBUG
  73      DRI_CONF_NO_RAST(false)
  74      DRI_CONF_ALWAYS_FLUSH_BATCH(false)
  75      DRI_CONF_ALWAYS_FLUSH_CACHE(false)
  76
  77       DRI_CONF_OPT_BEGIN(stub_occlusion_query, bool, false)
  78          DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
  79       DRI_CONF_OPT_END
  80
  81       DRI_CONF_OPT_BEGIN(shader_precompile, bool, false)
  82          DRI_CONF_DESC(en, "Perform code generation at shader link time.")
  83       DRI_CONF_OPT_END
  84    DRI_CONF_SECTION_END
  85 DRI_CONF_END;
  86
  87 const GLuint __driNConfigOptions = 12;
  88
  89 #include "intel_batchbuffer.h"
  90 #include "intel_buffers.h"
  91 #include "intel_bufmgr.h"
  92 #include "intel_chipset.h"
  93 #include "intel_fbo.h"
  94 #include "intel_mipmap_tree.h"
  95 #include "intel_screen.h"
  96 #include "intel_tex.h"
  97 #include "intel_regions.h"
  98
  99 #include "i915_drm.h"
 100
 101 #ifdef USE_NEW_INTERFACE
 102 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
 103 #endif /*USE_NEW_INTERFACE */
 104
 105 static const __DRItexBufferExtension intelTexBufferExtension = {
 106     { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 107    intelSetTexBuffer,
 108    intelSetTexBuffer2,
 109 };
 110
 111 static void
 112 intelDRI2Flush(__DRIdrawable *drawable)
 113 {
 114    GET_CURRENT_CONTEXT(ctx);
 115    struct intel_context *intel = intel_context(ctx);
 116
 117    if (intel->gen < 4)
 118       INTEL_FIREVERTICES(intel);
 119
 120    intel->need_throttle = true;
 121
 122    if (intel->batch.used)
 123       intel_batchbuffer_flush(intel);
 124 }
 125
 126 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 127     { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
 128     intelDRI2Flush,
 129     dri2InvalidateDrawable,
 130 };
 131
 132 static __DRIimage *
 133 intel_create_image_from_name(__DRIscreen *screen,
 134                              int width, int height, int format,
 135                              int name, int pitch, void *loaderPrivate)
 136 {
 137     struct intel_screen *intelScreen = screen->driverPrivate;
 138     __DRIimage *image;
 139     int cpp;
 140
 141     image = CALLOC(sizeof *image);
 142     if (image == NULL)
 143         return NULL;
 144
 145     switch (format) {
 146     case __DRI_IMAGE_FORMAT_RGB565:
 147        image->format = MESA_FORMAT_RGB565;
 148        image->internal_format = GL_RGB;
 149        image->data_type = GL_UNSIGNED_BYTE;
 150        break;
 151     case __DRI_IMAGE_FORMAT_XRGB8888:
 152        image->format = MESA_FORMAT_XRGB8888;
 153        image->internal_format = GL_RGB;
 154        image->data_type = GL_UNSIGNED_BYTE;
 155        break;
 156     case __DRI_IMAGE_FORMAT_ARGB8888:
 157        image->format = MESA_FORMAT_ARGB8888;
 158        image->internal_format = GL_RGBA;
 159        image->data_type = GL_UNSIGNED_BYTE;
 160        break;
 161     case __DRI_IMAGE_FORMAT_ABGR8888:
 162        image->format = MESA_FORMAT_RGBA8888_REV;
 163        image->internal_format = GL_RGBA;
 164        image->data_type = GL_UNSIGNED_BYTE;
 165        break;
 166     default:
 167        free(image);
 168        return NULL;
 169     }
 170
 171     image->data = loaderPrivate;
 172     cpp = _mesa_get_format_bytes(image->format);
 173
 174     image->region = intel_region_alloc_for_handle(intelScreen,
 175                                                   cpp, width, height,
 176                                                   pitch, name, "image");
 177     if (image->region == NULL) {
 178        FREE(image);
 179        return NULL;
 180     }
 181
 182     return image;
 183 }
 184
 185 static __DRIimage *
 186 intel_create_image_from_renderbuffer(__DRIcontext *context,
 187                                      int renderbuffer, void *loaderPrivate)
 188 {
 189    __DRIimage *image;
 190    struct intel_context *intel = context->driverPrivate;
 191    struct gl_renderbuffer *rb;
 192    struct intel_renderbuffer *irb;
 193
 194    rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
 195    if (!rb) {
 196       _mesa_error(&intel->ctx,
 197                   GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 198       return NULL;
 199    }
 200
 201    irb = intel_renderbuffer(rb);
 202    image = CALLOC(sizeof *image);
 203    if (image == NULL)
 204       return NULL;
 205
 206    image->internal_format = rb->InternalFormat;
 207    image->format = rb->Format;
 208    image->data_type = rb->DataType;
 209    image->data = loaderPrivate;
 210    intel_region_reference(&image->region, irb->mt->region);
 211
 212    return image;
 213 }
 214
 215 static void
 216 intel_destroy_image(__DRIimage *image)
 217 {
 218     intel_region_release(&image->region);
 219     FREE(image);
 220 }
 221
 222 static __DRIimage *
 223 intel_create_image(__DRIscreen *screen,
 224                    int width, int height, int format,
 225                    unsigned int use,
 226                    void *loaderPrivate)
 227 {
 228    __DRIimage *image;
 229    struct intel_screen *intelScreen = screen->driverPrivate;
 230    uint32_t tiling;
 231    int cpp;
 232
 233    tiling = I915_TILING_X;
 234    if (use & __DRI_IMAGE_USE_CURSOR) {
 235       if (width != 64 || height != 64)
 236          return NULL;
 237       tiling = I915_TILING_NONE;
 238    }
 239
 240    image = CALLOC(sizeof *image);
 241    if (image == NULL)
 242       return NULL;
 243
 244    switch (format) {
 245    case __DRI_IMAGE_FORMAT_RGB565:
 246       image->format = MESA_FORMAT_RGB565;
 247       image->internal_format = GL_RGB;
 248       image->data_type = GL_UNSIGNED_BYTE;
 249       break;
 250    case __DRI_IMAGE_FORMAT_XRGB8888:
 251       image->format = MESA_FORMAT_XRGB8888;
 252       image->internal_format = GL_RGB;
 253       image->data_type = GL_UNSIGNED_BYTE;
 254       break;
 255    case __DRI_IMAGE_FORMAT_ARGB8888:
 256       image->format = MESA_FORMAT_ARGB8888;
 257       image->internal_format = GL_RGBA;
 258       image->data_type = GL_UNSIGNED_BYTE;
 259       break;
 260     case __DRI_IMAGE_FORMAT_ABGR8888:
 261        image->format = MESA_FORMAT_RGBA8888_REV;
 262        image->internal_format = GL_RGBA;
 263        image->data_type = GL_UNSIGNED_BYTE;
 264        break;
 265    default:
 266       free(image);
 267       return NULL;
 268    }
 269
 270    image->data = loaderPrivate;
 271    cpp = _mesa_get_format_bytes(image->format);
 272
 273    image->region =
 274       intel_region_alloc(intelScreen, tiling,
 275                          cpp, width, height, true);
 276    if (image->region == NULL) {
 277       FREE(image);
 278       return NULL;
 279    }
 280
 281    return image;
 282 }
 283
 284 static GLboolean
 285 intel_query_image(__DRIimage *image, int attrib, int *value)
 286 {
 287    switch (attrib) {
 288    case __DRI_IMAGE_ATTRIB_STRIDE:
 289       *value = image->region->pitch * image->region->cpp;
 290       return true;
 291    case __DRI_IMAGE_ATTRIB_HANDLE:
 292       *value = image->region->bo->handle;
 293       return true;
 294    case __DRI_IMAGE_ATTRIB_NAME:
 295       return intel_region_flink(image->region, (uint32_t *) value);
 296    default:
 297       return false;
 298    }
 299 }
 300
 301 static __DRIimage *
 302 intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
 303 {
 304    __DRIimage *image;
 305
 306    image = CALLOC(sizeof *image);
 307    if (image == NULL)
 308       return NULL;
 309
 310    intel_region_reference(&image->region, orig_image->region);
 311    if (image->region == NULL) {
 312       FREE(image);
 313       return NULL;
 314    }
 315
 316    image->internal_format = orig_image->internal_format;
 317    image->format          = orig_image->format;
 318    image->data_type       = orig_image->data_type;
 319    image->data            = loaderPrivate;
 320
 321    return image;
 322 }
 323
 324 static struct __DRIimageExtensionRec intelImageExtension = {
 325     { __DRI_IMAGE, __DRI_IMAGE_VERSION },
 326     intel_create_image_from_name,
 327     intel_create_image_from_renderbuffer,
 328     intel_destroy_image,
 329     intel_create_image,
 330     intel_query_image,
 331     intel_dup_image
 332 };
 333
 334 static const __DRIextension *intelScreenExtensions[] = {
 335     &intelTexBufferExtension.base,
 336     &intelFlushExtension.base,
 337     &intelImageExtension.base,
 338     &dri2ConfigQueryExtension.base,
 339     NULL
 340 };
 341
 342 static bool
 343 intel_get_param(__DRIscreen *psp, int param, int *value)
 344 {
 345    int ret;
 346    struct drm_i915_getparam gp;
 347
 348    gp.param = param;
 349    gp.value = value;
 350
 351    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 352    if (ret) {
 353       if (ret != -EINVAL)
 354          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 355       return false;
 356    }
 357
 358    return true;
 359 }
 360
 361 static bool
 362 intel_get_boolean(__DRIscreen *psp, int param)
 363 {
 364    int value = 0;
 365    return intel_get_param(psp, param, &value) && value;
 366 }
 367
 368 static void
 369 nop_callback(GLuint key, void *data, void *userData)
 370 {
 371 }
 372
 373 static void
 374 intelDestroyScreen(__DRIscreen * sPriv)
 375 {
 376    struct intel_screen *intelScreen = sPriv->driverPrivate;
 377
 378    dri_bufmgr_destroy(intelScreen->bufmgr);
 379    driDestroyOptionInfo(&intelScreen->optionCache);
 380
 381    /* Some regions may still have references to them at this point, so
 382     * flush the hash table to prevent _mesa_DeleteHashTable() from
 383     * complaining about the hash not being empty; */
 384    _mesa_HashDeleteAll(intelScreen->named_regions, nop_callback, NULL);
 385    _mesa_DeleteHashTable(intelScreen->named_regions);
 386
 387    FREE(intelScreen);
 388    sPriv->driverPrivate = NULL;
 389 }
 390
 391
 392 /**
 393  * This is called when we need to set up GL rendering to a new X window.
 394  */
 395 static GLboolean
 396 intelCreateBuffer(__DRIscreen * driScrnPriv,
 397                   __DRIdrawable * driDrawPriv,
 398                   const struct gl_config * mesaVis, GLboolean isPixmap)
 399 {
 400    struct intel_renderbuffer *rb;
 401    struct intel_screen *screen = (struct intel_screen*) driScrnPriv->driverPrivate;
 402
 403    if (isPixmap) {
 404       return false;          /* not implemented */
 405    }
 406    else {
 407       gl_format rgbFormat;
 408
 409       struct gl_framebuffer *fb = CALLOC_STRUCT(gl_framebuffer);
 410
 411       if (!fb)
 412          return false;
 413
 414       _mesa_initialize_window_framebuffer(fb, mesaVis);
 415
 416       if (mesaVis->redBits == 5)
 417          rgbFormat = MESA_FORMAT_RGB565;
 418       else if (mesaVis->alphaBits == 0)
 419          rgbFormat = MESA_FORMAT_XRGB8888;
 420       else
 421          rgbFormat = MESA_FORMAT_ARGB8888;
 422
 423       /* setup the hardware-based renderbuffers */
 424       rb = intel_create_renderbuffer(rgbFormat);
 425       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base);
 426
 427       if (mesaVis->doubleBufferMode) {
 428          rb = intel_create_renderbuffer(rgbFormat);
 429          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base);
 430       }
 431
 432       /*
 433        * Assert here that the gl_config has an expected depth/stencil bit
 434        * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
 435        * which constructs the advertised configs.)
 436        */
 437       if (mesaVis->depthBits == 24) {
 438          assert(mesaVis->stencilBits == 8);
 439
 440          if (screen->hw_has_separate_stencil
 441              && screen->dri2_has_hiz != INTEL_DRI2_HAS_HIZ_FALSE) {
 442             /*
 443              * Request a separate stencil buffer even if we do not yet know if
 444              * the screen supports it. (See comments for
 445              * enum intel_dri2_has_hiz).
 446              */
 447             rb = intel_create_renderbuffer(MESA_FORMAT_X8_Z24);
 448             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base);
 449             rb = intel_create_renderbuffer(MESA_FORMAT_S8);
 450             _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base);
 451          } else {
 452             /*
 453              * Use combined depth/stencil. Note that the renderbuffer is
 454              * attached to two attachment points.
 455              */
 456             rb = intel_create_renderbuffer(MESA_FORMAT_S8_Z24);
 457             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base);
 458             _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base);
 459          }
 460       }
 461       else if (mesaVis->depthBits == 16) {
 462          assert(mesaVis->stencilBits == 0);
 463          /* just 16-bit depth buffer, no hw stencil */
 464          struct intel_renderbuffer *depthRb
 465             = intel_create_renderbuffer(MESA_FORMAT_Z16);
 466          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 467       }
 468       else {
 469          assert(mesaVis->depthBits == 0);
 470          assert(mesaVis->stencilBits == 0);
 471       }
 472
 473       /* now add any/all software-based renderbuffers we may need */
 474       _swrast_add_soft_renderbuffers(fb,
 475                                      false, /* never sw color */
 476                                      false, /* never sw depth */
 477                                      false, /* never sw stencil */
 478                                      mesaVis->accumRedBits > 0,
 479                                      false, /* never sw alpha */
 480                                      false  /* never sw aux */ );
 481       driDrawPriv->driverPrivate = fb;
 482
 483       return true;
 484    }
 485 }
 486
 487 static void
 488 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 489 {
 490     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 491
 492     _mesa_reference_framebuffer(&fb, NULL);
 493 }
 494
 495 /* There are probably better ways to do this, such as an
 496  * init-designated function to register chipids and createcontext
 497  * functions.
 498  */
 499 extern bool
 500 i830CreateContext(const struct gl_config *mesaVis,
 501                   __DRIcontext *driContextPriv,
 502                   void *sharedContextPrivate);
 503
 504 extern bool
 505 i915CreateContext(int api,
 506                   const struct gl_config *mesaVis,
 507                   __DRIcontext *driContextPriv,
 508                   void *sharedContextPrivate);
 509 extern bool
 510 brwCreateContext(int api,
 511                  const struct gl_config *mesaVis,
 512                  __DRIcontext *driContextPriv,
 513                  void *sharedContextPrivate);
 514
 515 static GLboolean
 516 intelCreateContext(gl_api api,
 517                    const struct gl_config * mesaVis,
 518                    __DRIcontext * driContextPriv,
 519                    unsigned major_version,
 520                    unsigned minor_version,
 521                    uint32_t flags,
 522                    unsigned *error,
 523                    void *sharedContextPrivate)
 524 {
 525    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 526    struct intel_screen *intelScreen = sPriv->driverPrivate;
 527    bool success;
 528
 529 #ifdef I915
 530    if (IS_9XX(intelScreen->deviceID)) {
 531       if (!IS_965(intelScreen->deviceID)) {
 532          success = i915CreateContext(api, mesaVis, driContextPriv,
 533                                      sharedContextPrivate);
 534       }
 535    } else {
 536       intelScreen->no_vbo = true;
 537       success = i830CreateContext(mesaVis, driContextPriv,
 538                                   sharedContextPrivate);
 539    }
 540 #else
 541    if (IS_965(intelScreen->deviceID))
 542       success = brwCreateContext(api, mesaVis,
 543                               driContextPriv,
 544                               sharedContextPrivate);
 545 #endif
 546
 547    if (success) {
 548       struct gl_context *ctx =
 549          (struct gl_context *) driContextPriv->driverPrivate;
 550
 551       _mesa_compute_version(ctx);
 552       if (ctx->VersionMajor > major_version
 553           || (ctx->VersionMajor == major_version
 554               && ctx->VersionMinor >= minor_version)) {
 555          *error = __DRI_CTX_ERROR_BAD_VERSION;
 556          return true;
 557       }
 558
 559       intelDestroyContext(driContextPriv);
 560    } else {
 561       *error = __DRI_CTX_ERROR_NO_MEMORY;
 562       fprintf(stderr, "Unrecognized deviceID 0x%x\n", intelScreen->deviceID);
 563    }
 564
 565    return false;
 566 }
 567
 568 static bool
 569 intel_init_bufmgr(struct intel_screen *intelScreen)
 570 {
 571    __DRIscreen *spriv = intelScreen->driScrnPriv;
 572    int num_fences = 0;
 573
 574    intelScreen->no_hw = (getenv("INTEL_NO_HW") != NULL ||
 575                          getenv("INTEL_DEVID_OVERRIDE") != NULL);
 576
 577    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 578    if (intelScreen->bufmgr == NULL) {
 579       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 580               __func__, __LINE__);
 581       return false;
 582    }
 583
 584    if (!intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences) ||
 585        num_fences == 0) {
 586       fprintf(stderr, "[%s: %u] Kernel 2.6.29 required.\n", __func__, __LINE__);
 587       return false;
 588    }
 589
 590    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 591
 592    intelScreen->named_regions = _mesa_NewHashTable();
 593
 594    intelScreen->relaxed_relocations = 0;
 595    intelScreen->relaxed_relocations |=
 596       intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA) << 0;
 597
 598    return true;
 599 }
 600
 601 /**
 602  * Override intel_screen.hw_has_hiz with environment variable INTEL_HIZ.
 603  *
 604  * Valid values for INTEL_HIZ are "0" and "1". If an invalid valid value is
 605  * encountered, a warning is emitted and INTEL_HIZ is ignored.
 606  */
 607 static void
 608 intel_override_hiz(struct intel_screen *intel)
 609 {
 610    const char *s = getenv("INTEL_HIZ");
 611    if (!s) {
 612       return;
 613    } else if (!strncmp("0", s, 2)) {
 614       intel->hw_has_hiz = false;
 615    } else if (!strncmp("1", s, 2)) {
 616       intel->hw_has_hiz = true;
 617    } else {
 618       fprintf(stderr,
 619               "warning: env variable INTEL_HIZ=\"%s\" has invalid value "
 620               "and is ignored", s);
 621    }
 622 }
 623
 624 /**
 625  * Override intel_screen.hw_has_separate_stencil with environment variable
 626  * INTEL_SEPARATE_STENCIL.
 627  *
 628  * Valid values for INTEL_SEPARATE_STENCIL are "0" and "1". If an invalid
 629  * valid value is encountered, a warning is emitted and INTEL_SEPARATE_STENCIL
 630  * is ignored.
 631  */
 632 static void
 633 intel_override_separate_stencil(struct intel_screen *screen)
 634 {
 635    const char *s = getenv("INTEL_SEPARATE_STENCIL");
 636    if (!s) {
 637       return;
 638    } else if (!strncmp("0", s, 2)) {
 639       screen->hw_has_separate_stencil = false;
 640    } else if (!strncmp("1", s, 2)) {
 641       screen->hw_has_separate_stencil = true;
 642    } else {
 643       fprintf(stderr,
 644               "warning: env variable INTEL_SEPARATE_STENCIL=\"%s\" has "
 645               "invalid value and is ignored", s);
 646    }
 647 }
 648
 649 /**
 650  * This is the driver specific part of the createNewScreen entry point.
 651  * Called when using DRI2.
 652  *
 653  * \return the struct gl_config supported by this driver
 654  */
 655 static const
 656 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
 657 {
 658    struct intel_screen *intelScreen;
 659    GLenum fb_format[3];
 660    GLenum fb_type[3];
 661    unsigned int api_mask;
 662    char *devid_override;
 663
 664    static const GLenum back_buffer_modes[] = {
 665        GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 666    };
 667    uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
 668    int color;
 669    __DRIconfig **configs = NULL;
 670
 671    /* Allocate the private area */
 672    intelScreen = CALLOC(sizeof *intelScreen);
 673    if (!intelScreen) {
 674       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
 675       return false;
 676    }
 677    /* parse information in __driConfigOptions */
 678    driParseOptionInfo(&intelScreen->optionCache,
 679                       __driConfigOptions, __driNConfigOptions);
 680
 681    intelScreen->driScrnPriv = psp;
 682    psp->driverPrivate = (void *) intelScreen;
 683
 684    /* Determine chipset ID */
 685    if (!intel_get_param(psp, I915_PARAM_CHIPSET_ID,
 686                         &intelScreen->deviceID))
 687       return false;
 688
 689    /* Allow an override of the device ID for the purpose of making the
 690     * driver produce dumps for debugging of new chipset enablement.
 691     * This implies INTEL_NO_HW, to avoid programming your actual GPU
 692     * incorrectly.
 693     */
 694    devid_override = getenv("INTEL_DEVID_OVERRIDE");
 695    if (devid_override) {
 696       intelScreen->deviceID = strtod(devid_override, NULL);
 697    }
 698
 699    if (IS_GEN7(intelScreen->deviceID)) {
 700       intelScreen->gen = 7;
 701    } else if (IS_GEN6(intelScreen->deviceID)) {
 702       intelScreen->gen = 6;
 703    } else if (IS_GEN5(intelScreen->deviceID)) {
 704       intelScreen->gen = 5;
 705    } else if (IS_965(intelScreen->deviceID)) {
 706       intelScreen->gen = 4;
 707    } else if (IS_9XX(intelScreen->deviceID)) {
 708       intelScreen->gen = 3;
 709    } else {
 710       intelScreen->gen = 2;
 711    }
 712
 713    intelScreen->hw_has_separate_stencil = intelScreen->gen >= 6;
 714    intelScreen->hw_must_use_separate_stencil = intelScreen->gen >= 7;
 715    intelScreen->hw_has_hiz = intelScreen->gen == 6; /* Not yet for gen7. */
 716    intelScreen->dri2_has_hiz = INTEL_DRI2_HAS_HIZ_UNKNOWN;
 717
 718    intel_override_hiz(intelScreen);
 719    intel_override_separate_stencil(intelScreen);
 720
 721    api_mask = (1 << __DRI_API_OPENGL);
 722 #if FEATURE_ES1
 723    api_mask |= (1 << __DRI_API_GLES);
 724 #endif
 725 #if FEATURE_ES2
 726    api_mask |= (1 << __DRI_API_GLES2);
 727 #endif
 728
 729    if (IS_9XX(intelScreen->deviceID) || IS_965(intelScreen->deviceID))
 730       psp->api_mask = api_mask;
 731
 732    if (!intel_init_bufmgr(intelScreen))
 733        return false;
 734
 735    psp->extensions = intelScreenExtensions;
 736
 737    msaa_samples_array[0] = 0;
 738
 739    fb_format[0] = GL_RGB;
 740    fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
 741
 742    fb_format[1] = GL_BGR;
 743    fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
 744
 745    fb_format[2] = GL_BGRA;
 746    fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
 747
 748    depth_bits[0] = 0;
 749    stencil_bits[0] = 0;
 750
 751    /* Generate a rich set of useful configs that do not include an
 752     * accumulation buffer.
 753     */
 754    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 755       __DRIconfig **new_configs;
 756       int depth_factor;
 757
 758       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
 759        * buffer that has a diffferent number of bits per pixel than the color
 760        * buffer.  This isn't yet supported here.
 761        */
 762       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 763          depth_bits[1] = 16;
 764          stencil_bits[1] = 0;
 765       } else {
 766          depth_bits[1] = 24;
 767          stencil_bits[1] = 8;
 768       }
 769
 770       depth_factor = 2;
 771
 772       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 773                                      depth_bits,
 774                                      stencil_bits,
 775                                      depth_factor,
 776                                      back_buffer_modes,
 777                                      ARRAY_SIZE(back_buffer_modes),
 778                                      msaa_samples_array,
 779                                      ARRAY_SIZE(msaa_samples_array),
 780                                      false);
 781       if (configs == NULL)
 782          configs = new_configs;
 783       else
 784          configs = driConcatConfigs(configs, new_configs);
 785    }
 786
 787    /* Generate the minimum possible set of configs that include an
 788     * accumulation buffer.
 789     */
 790    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 791       __DRIconfig **new_configs;
 792
 793       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 794          depth_bits[0] = 16;
 795          stencil_bits[0] = 0;
 796       } else {
 797          depth_bits[0] = 24;
 798          stencil_bits[0] = 8;
 799       }
 800
 801       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 802                                      depth_bits, stencil_bits, 1,
 803                                      back_buffer_modes + 1, 1,
 804                                      msaa_samples_array, 1,
 805                                      true);
 806       if (configs == NULL)
 807          configs = new_configs;
 808       else
 809          configs = driConcatConfigs(configs, new_configs);
 810    }
 811
 812    if (configs == NULL) {
 813       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 814               __LINE__);
 815       return NULL;
 816    }
 817
 818    return (const __DRIconfig **)configs;
 819 }
 820
 821 struct intel_buffer {
 822    __DRIbuffer base;
 823    struct intel_region *region;
 824 };
 825
 826 /**
 827  * \brief Get tiling format for a DRI buffer.
 828  *
 829  * \param attachment is the buffer's attachmet point, such as
 830  *        __DRI_BUFFER_DEPTH.
 831  * \param out_tiling is the returned tiling format for buffer.
 832  * \return false if attachment is unrecognized or is incompatible with screen.
 833  */
 834 static bool
 835 intel_get_dri_buffer_tiling(struct intel_screen *screen,
 836                             uint32_t attachment,
 837                             uint32_t *out_tiling)
 838 {
 839    if (screen->gen < 4) {
 840       *out_tiling = I915_TILING_X;
 841       return true;
 842    }
 843
 844    switch (attachment) {
 845    case __DRI_BUFFER_DEPTH:
 846    case __DRI_BUFFER_DEPTH_STENCIL:
 847    case __DRI_BUFFER_HIZ:
 848       *out_tiling = I915_TILING_Y;
 849       return true;
 850    case __DRI_BUFFER_ACCUM:
 851    case __DRI_BUFFER_FRONT_LEFT:
 852    case __DRI_BUFFER_FRONT_RIGHT:
 853    case __DRI_BUFFER_BACK_LEFT:
 854    case __DRI_BUFFER_BACK_RIGHT:
 855    case __DRI_BUFFER_FAKE_FRONT_LEFT:
 856    case __DRI_BUFFER_FAKE_FRONT_RIGHT:
 857       *out_tiling = I915_TILING_X;
 858       return true;
 859    case __DRI_BUFFER_STENCIL:
 860       /* The stencil buffer is W tiled. However, we request from the kernel
 861        * a non-tiled buffer because the GTT is incapable of W fencing.
 862        */
 863       *out_tiling = I915_TILING_NONE;
 864       return true;
 865    default:
 866       if(unlikely(INTEL_DEBUG & DEBUG_DRI)) {
 867          fprintf(stderr, "error: %s: unrecognized DRI buffer attachment 0x%x\n",
 868                  __FUNCTION__, attachment);
 869       }
 870        return false;
 871    }
 872 }
 873
 874 static __DRIbuffer *
 875 intelAllocateBuffer(__DRIscreen *screen,
 876                     unsigned attachment, unsigned format,
 877                     int width, int height)
 878 {
 879    struct intel_buffer *intelBuffer;
 880    struct intel_screen *intelScreen = screen->driverPrivate;
 881
 882    uint32_t tiling;
 883    uint32_t region_width;
 884    uint32_t region_height;
 885    uint32_t region_cpp;
 886
 887    bool ok = true;
 888
 889    ok = intel_get_dri_buffer_tiling(intelScreen, attachment, &tiling);
 890    if (!ok)
 891       return NULL;
 892
 893    intelBuffer = CALLOC(sizeof *intelBuffer);
 894    if (intelBuffer == NULL)
 895       return NULL;
 896
 897    if (attachment == __DRI_BUFFER_STENCIL) {
 898       /* The stencil buffer has quirky pitch requirements.  From Vol 2a,
 899        * 11.5.6.2.1 3DSTATE_STENCIL_BUFFER, field "Surface Pitch":
 900        *    The pitch must be set to 2x the value computed based on width, as
 901        *    the stencil buffer is stored with two rows interleaved.
 902        * To accomplish this, we resort to the nasty hack of doubling the
 903        * region's cpp and halving its height.
 904        */
 905       region_width = ALIGN(width, 64);
 906       region_height = ALIGN(ALIGN(height, 2) / 2, 64);
 907       region_cpp = format / 4;
 908    } else {
 909       region_width = width;
 910       region_height = height;
 911       region_cpp = format / 8;
 912    }
 913
 914    intelBuffer->region = intel_region_alloc(intelScreen,
 915                                             tiling,
 916                                             region_cpp,
 917                                             region_width,
 918                                             region_height,
 919                                             true);
 920
 921    if (intelBuffer->region == NULL) {
 922            FREE(intelBuffer);
 923            return NULL;
 924    }
 925
 926    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
 927
 928    intelBuffer->base.attachment = attachment;
 929    intelBuffer->base.cpp = intelBuffer->region->cpp;
 930    intelBuffer->base.pitch =
 931          intelBuffer->region->pitch * intelBuffer->region->cpp;
 932
 933    return &intelBuffer->base;
 934 }
 935
 936 static void
 937 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 938 {
 939    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
 940
 941    intel_region_release(&intelBuffer->region);
 942    free(intelBuffer);
 943 }
 944
 945
 946 const struct __DriverAPIRec driDriverAPI = {
 947    .InitScreen           = intelInitScreen2,
 948    .DestroyScreen        = intelDestroyScreen,
 949    .CreateContext        = intelCreateContext,
 950    .DestroyContext       = intelDestroyContext,
 951    .CreateBuffer         = intelCreateBuffer,
 952    .DestroyBuffer        = intelDestroyBuffer,
 953    .MakeCurrent          = intelMakeCurrent,
 954    .UnbindContext        = intelUnbindContext,
 955    .AllocateBuffer       = intelAllocateBuffer,
 956    .ReleaseBuffer        = intelReleaseBuffer
 957 };
 958
 959 /* This is the table of extensions that the loader will dlsym() for. */
 960 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 961     &driCoreExtension.base,
 962     &driDRI2Extension.base,
 963     NULL
 964 };