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      DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN(false)
  78
  79       DRI_CONF_OPT_BEGIN(stub_occlusion_query, bool, false)
  80          DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
  81       DRI_CONF_OPT_END
  82
  83       DRI_CONF_OPT_BEGIN(shader_precompile, bool, false)
  84          DRI_CONF_DESC(en, "Perform code generation at shader link time.")
  85       DRI_CONF_OPT_END
  86    DRI_CONF_SECTION_END
  87 DRI_CONF_END;
  88
  89 const GLuint __driNConfigOptions = 13;
  90
  91 #include "intel_batchbuffer.h"
  92 #include "intel_buffers.h"
  93 #include "intel_bufmgr.h"
  94 #include "intel_chipset.h"
  95 #include "intel_fbo.h"
  96 #include "intel_mipmap_tree.h"
  97 #include "intel_screen.h"
  98 #include "intel_tex.h"
  99 #include "intel_regions.h"
 100
 101 #include "i915_drm.h"
 102
 103 #ifdef USE_NEW_INTERFACE
 104 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
 105 #endif /*USE_NEW_INTERFACE */
 106
 107 static const __DRItexBufferExtension intelTexBufferExtension = {
 108     { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 109    intelSetTexBuffer,
 110    intelSetTexBuffer2,
 111 };
 112
 113 static void
 114 intelDRI2Flush(__DRIdrawable *drawable)
 115 {
 116    GET_CURRENT_CONTEXT(ctx);
 117    struct intel_context *intel = intel_context(ctx);
 118    if (intel == NULL)
 119       return;
 120
 121    if (intel->gen < 4)
 122       INTEL_FIREVERTICES(intel);
 123
 124    intel->need_throttle = true;
 125
 126    if (intel->batch.used)
 127       intel_batchbuffer_flush(intel);
 128 }
 129
 130 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 131     { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
 132     intelDRI2Flush,
 133     dri2InvalidateDrawable,
 134 };
 135
 136 static __DRIimage *
 137 intel_create_image_from_name(__DRIscreen *screen,
 138                              int width, int height, int format,
 139                              int name, int pitch, void *loaderPrivate)
 140 {
 141     struct intel_screen *intelScreen = screen->driverPrivate;
 142     __DRIimage *image;
 143     int cpp;
 144
 145     image = CALLOC(sizeof *image);
 146     if (image == NULL)
 147         return NULL;
 148
 149     switch (format) {
 150     case __DRI_IMAGE_FORMAT_RGB565:
 151        image->format = MESA_FORMAT_RGB565;
 152        image->internal_format = GL_RGB;
 153        image->data_type = GL_UNSIGNED_BYTE;
 154        break;
 155     case __DRI_IMAGE_FORMAT_XRGB8888:
 156        image->format = MESA_FORMAT_XRGB8888;
 157        image->internal_format = GL_RGB;
 158        image->data_type = GL_UNSIGNED_BYTE;
 159        break;
 160     case __DRI_IMAGE_FORMAT_ARGB8888:
 161        image->format = MESA_FORMAT_ARGB8888;
 162        image->internal_format = GL_RGBA;
 163        image->data_type = GL_UNSIGNED_BYTE;
 164        break;
 165     case __DRI_IMAGE_FORMAT_ABGR8888:
 166        image->format = MESA_FORMAT_RGBA8888_REV;
 167        image->internal_format = GL_RGBA;
 168        image->data_type = GL_UNSIGNED_BYTE;
 169        break;
 170     default:
 171        free(image);
 172        return NULL;
 173     }
 174
 175     image->data = loaderPrivate;
 176     cpp = _mesa_get_format_bytes(image->format);
 177
 178     image->region = intel_region_alloc_for_handle(intelScreen,
 179                                                   cpp, width, height,
 180                                                   pitch, name, "image");
 181     if (image->region == NULL) {
 182        FREE(image);
 183        return NULL;
 184     }
 185
 186     return image;
 187 }
 188
 189 static __DRIimage *
 190 intel_create_image_from_renderbuffer(__DRIcontext *context,
 191                                      int renderbuffer, void *loaderPrivate)
 192 {
 193    __DRIimage *image;
 194    struct intel_context *intel = context->driverPrivate;
 195    struct gl_renderbuffer *rb;
 196    struct intel_renderbuffer *irb;
 197
 198    rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
 199    if (!rb) {
 200       _mesa_error(&intel->ctx,
 201                   GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 202       return NULL;
 203    }
 204
 205    irb = intel_renderbuffer(rb);
 206    image = CALLOC(sizeof *image);
 207    if (image == NULL)
 208       return NULL;
 209
 210    image->internal_format = rb->InternalFormat;
 211    image->format = rb->Format;
 212    image->data_type = GL_UNSIGNED_BYTE;
 213    image->data = loaderPrivate;
 214    intel_region_reference(&image->region, irb->mt->region);
 215
 216    return image;
 217 }
 218
 219 static void
 220 intel_destroy_image(__DRIimage *image)
 221 {
 222     intel_region_release(&image->region);
 223     FREE(image);
 224 }
 225
 226 static __DRIimage *
 227 intel_create_image(__DRIscreen *screen,
 228                    int width, int height, int format,
 229                    unsigned int use,
 230                    void *loaderPrivate)
 231 {
 232    __DRIimage *image;
 233    struct intel_screen *intelScreen = screen->driverPrivate;
 234    uint32_t tiling;
 235    int cpp;
 236
 237    tiling = I915_TILING_X;
 238    if (use & __DRI_IMAGE_USE_CURSOR) {
 239       if (width != 64 || height != 64)
 240          return NULL;
 241       tiling = I915_TILING_NONE;
 242    }
 243
 244    image = CALLOC(sizeof *image);
 245    if (image == NULL)
 246       return NULL;
 247
 248    image->dri_format = format;
 249
 250    switch (format) {
 251    case __DRI_IMAGE_FORMAT_RGB565:
 252       image->format = MESA_FORMAT_RGB565;
 253       image->internal_format = GL_RGB;
 254       image->data_type = GL_UNSIGNED_BYTE;
 255       break;
 256    case __DRI_IMAGE_FORMAT_XRGB8888:
 257       image->format = MESA_FORMAT_XRGB8888;
 258       image->internal_format = GL_RGB;
 259       image->data_type = GL_UNSIGNED_BYTE;
 260       break;
 261    case __DRI_IMAGE_FORMAT_ARGB8888:
 262       image->format = MESA_FORMAT_ARGB8888;
 263       image->internal_format = GL_RGBA;
 264       image->data_type = GL_UNSIGNED_BYTE;
 265       break;
 266     case __DRI_IMAGE_FORMAT_ABGR8888:
 267        image->format = MESA_FORMAT_RGBA8888_REV;
 268        image->internal_format = GL_RGBA;
 269        image->data_type = GL_UNSIGNED_BYTE;
 270        break;
 271    default:
 272       free(image);
 273       return NULL;
 274    }
 275
 276    image->data = loaderPrivate;
 277    cpp = _mesa_get_format_bytes(image->format);
 278
 279    image->region =
 280       intel_region_alloc(intelScreen, tiling,
 281                          cpp, width, height, true);
 282    if (image->region == NULL) {
 283       FREE(image);
 284       return NULL;
 285    }
 286
 287    return image;
 288 }
 289
 290 static GLboolean
 291 intel_query_image(__DRIimage *image, int attrib, int *value)
 292 {
 293    switch (attrib) {
 294    case __DRI_IMAGE_ATTRIB_STRIDE:
 295       *value = image->region->pitch * image->region->cpp;
 296       return true;
 297    case __DRI_IMAGE_ATTRIB_HANDLE:
 298       *value = image->region->bo->handle;
 299       return true;
 300    case __DRI_IMAGE_ATTRIB_NAME:
 301       return intel_region_flink(image->region, (uint32_t *) value);
 302    case __DRI_IMAGE_ATTRIB_FORMAT:
 303       return image->dri_format;
 304    default:
 305       return false;
 306    }
 307 }
 308
 309 static __DRIimage *
 310 intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
 311 {
 312    __DRIimage *image;
 313
 314    image = CALLOC(sizeof *image);
 315    if (image == NULL)
 316       return NULL;
 317
 318    intel_region_reference(&image->region, orig_image->region);
 319    if (image->region == NULL) {
 320       FREE(image);
 321       return NULL;
 322    }
 323
 324    image->internal_format = orig_image->internal_format;
 325    image->format          = orig_image->format;
 326    image->data_type       = orig_image->data_type;
 327    image->data            = loaderPrivate;
 328
 329    return image;
 330 }
 331
 332 static GLboolean
 333 intel_validate_usage(__DRIimage *image, unsigned int use)
 334 {
 335    if (use & __DRI_IMAGE_USE_CURSOR) {
 336       if (image->region->width != 64 || image->region->height != 64)
 337          return GL_FALSE;
 338    }
 339
 340    return GL_TRUE;
 341 }
 342
 343 static struct __DRIimageExtensionRec intelImageExtension = {
 344     { __DRI_IMAGE, 2 },
 345     intel_create_image_from_name,
 346     intel_create_image_from_renderbuffer,
 347     intel_destroy_image,
 348     intel_create_image,
 349     intel_query_image,
 350     intel_dup_image,
 351     intel_validate_usage
 352 };
 353
 354 static const __DRIextension *intelScreenExtensions[] = {
 355     &intelTexBufferExtension.base,
 356     &intelFlushExtension.base,
 357     &intelImageExtension.base,
 358     &dri2ConfigQueryExtension.base,
 359     NULL
 360 };
 361
 362 static bool
 363 intel_get_param(__DRIscreen *psp, int param, int *value)
 364 {
 365    int ret;
 366    struct drm_i915_getparam gp;
 367
 368    memset(&gp, 0, sizeof(gp));
 369    gp.param = param;
 370    gp.value = value;
 371
 372    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 373    if (ret) {
 374       if (ret != -EINVAL)
 375          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 376       return false;
 377    }
 378
 379    return true;
 380 }
 381
 382 static bool
 383 intel_get_boolean(__DRIscreen *psp, int param)
 384 {
 385    int value = 0;
 386    return intel_get_param(psp, param, &value) && value;
 387 }
 388
 389 static void
 390 nop_callback(GLuint key, void *data, void *userData)
 391 {
 392 }
 393
 394 static void
 395 intelDestroyScreen(__DRIscreen * sPriv)
 396 {
 397    struct intel_screen *intelScreen = sPriv->driverPrivate;
 398
 399    dri_bufmgr_destroy(intelScreen->bufmgr);
 400    driDestroyOptionInfo(&intelScreen->optionCache);
 401
 402    /* Some regions may still have references to them at this point, so
 403     * flush the hash table to prevent _mesa_DeleteHashTable() from
 404     * complaining about the hash not being empty; */
 405    _mesa_HashDeleteAll(intelScreen->named_regions, nop_callback, NULL);
 406    _mesa_DeleteHashTable(intelScreen->named_regions);
 407
 408    FREE(intelScreen);
 409    sPriv->driverPrivate = NULL;
 410 }
 411
 412
 413 /**
 414  * This is called when we need to set up GL rendering to a new X window.
 415  */
 416 static GLboolean
 417 intelCreateBuffer(__DRIscreen * driScrnPriv,
 418                   __DRIdrawable * driDrawPriv,
 419                   const struct gl_config * mesaVis, GLboolean isPixmap)
 420 {
 421    struct intel_renderbuffer *rb;
 422    struct intel_screen *screen = (struct intel_screen*) driScrnPriv->driverPrivate;
 423
 424    if (isPixmap) {
 425       return false;          /* not implemented */
 426    }
 427    else {
 428       gl_format rgbFormat;
 429
 430       struct gl_framebuffer *fb = CALLOC_STRUCT(gl_framebuffer);
 431
 432       if (!fb)
 433          return false;
 434
 435       _mesa_initialize_window_framebuffer(fb, mesaVis);
 436
 437       if (mesaVis->redBits == 5)
 438          rgbFormat = MESA_FORMAT_RGB565;
 439       else if (mesaVis->alphaBits == 0)
 440          rgbFormat = MESA_FORMAT_XRGB8888;
 441       else
 442          rgbFormat = MESA_FORMAT_ARGB8888;
 443
 444       /* setup the hardware-based renderbuffers */
 445       rb = intel_create_renderbuffer(rgbFormat);
 446       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base.Base);
 447
 448       if (mesaVis->doubleBufferMode) {
 449          rb = intel_create_renderbuffer(rgbFormat);
 450          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base.Base);
 451       }
 452
 453       /*
 454        * Assert here that the gl_config has an expected depth/stencil bit
 455        * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
 456        * which constructs the advertised configs.)
 457        */
 458       if (mesaVis->depthBits == 24) {
 459          assert(mesaVis->stencilBits == 8);
 460
 461          if (screen->hw_has_separate_stencil
 462              && screen->dri2_has_hiz != INTEL_DRI2_HAS_HIZ_FALSE) {
 463             /*
 464              * Request a separate stencil buffer even if we do not yet know if
 465              * the screen supports it. (See comments for
 466              * enum intel_dri2_has_hiz).
 467              */
 468             rb = intel_create_renderbuffer(MESA_FORMAT_X8_Z24);
 469             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 470             rb = intel_create_renderbuffer(MESA_FORMAT_S8);
 471             _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 472          } else {
 473             /*
 474              * Use combined depth/stencil. Note that the renderbuffer is
 475              * attached to two attachment points.
 476              */
 477             rb = intel_create_renderbuffer(MESA_FORMAT_S8_Z24);
 478             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 479             _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 480          }
 481       }
 482       else if (mesaVis->depthBits == 16) {
 483          assert(mesaVis->stencilBits == 0);
 484          /* just 16-bit depth buffer, no hw stencil */
 485          struct intel_renderbuffer *depthRb
 486             = intel_create_renderbuffer(MESA_FORMAT_Z16);
 487          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base.Base);
 488       }
 489       else {
 490          assert(mesaVis->depthBits == 0);
 491          assert(mesaVis->stencilBits == 0);
 492       }
 493
 494       /* now add any/all software-based renderbuffers we may need */
 495       _swrast_add_soft_renderbuffers(fb,
 496                                      false, /* never sw color */
 497                                      false, /* never sw depth */
 498                                      false, /* never sw stencil */
 499                                      mesaVis->accumRedBits > 0,
 500                                      false, /* never sw alpha */
 501                                      false  /* never sw aux */ );
 502       driDrawPriv->driverPrivate = fb;
 503
 504       return true;
 505    }
 506 }
 507
 508 static void
 509 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 510 {
 511     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 512
 513     _mesa_reference_framebuffer(&fb, NULL);
 514 }
 515
 516 /* There are probably better ways to do this, such as an
 517  * init-designated function to register chipids and createcontext
 518  * functions.
 519  */
 520 extern bool
 521 i830CreateContext(const struct gl_config *mesaVis,
 522                   __DRIcontext *driContextPriv,
 523                   void *sharedContextPrivate);
 524
 525 extern bool
 526 i915CreateContext(int api,
 527                   const struct gl_config *mesaVis,
 528                   __DRIcontext *driContextPriv,
 529                   void *sharedContextPrivate);
 530 extern bool
 531 brwCreateContext(int api,
 532                  const struct gl_config *mesaVis,
 533                  __DRIcontext *driContextPriv,
 534                  void *sharedContextPrivate);
 535
 536 static GLboolean
 537 intelCreateContext(gl_api api,
 538                    const struct gl_config * mesaVis,
 539                    __DRIcontext * driContextPriv,
 540                    unsigned major_version,
 541                    unsigned minor_version,
 542                    uint32_t flags,
 543                    unsigned *error,
 544                    void *sharedContextPrivate)
 545 {
 546    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 547    struct intel_screen *intelScreen = sPriv->driverPrivate;
 548    bool success = false;
 549
 550 #ifdef I915
 551    if (IS_9XX(intelScreen->deviceID)) {
 552       if (!IS_965(intelScreen->deviceID)) {
 553          success = i915CreateContext(api, mesaVis, driContextPriv,
 554                                      sharedContextPrivate);
 555       }
 556    } else {
 557       intelScreen->no_vbo = true;
 558       success = i830CreateContext(mesaVis, driContextPriv,
 559                                   sharedContextPrivate);
 560    }
 561 #else
 562    if (IS_965(intelScreen->deviceID))
 563       success = brwCreateContext(api, mesaVis,
 564                               driContextPriv,
 565                               sharedContextPrivate);
 566 #endif
 567
 568    if (success) {
 569       struct gl_context *ctx =
 570          (struct gl_context *) driContextPriv->driverPrivate;
 571
 572       _mesa_compute_version(ctx);
 573       if (ctx->VersionMajor > major_version
 574           || (ctx->VersionMajor == major_version
 575               && ctx->VersionMinor >= minor_version)) {
 576          *error = __DRI_CTX_ERROR_BAD_VERSION;
 577          return true;
 578       }
 579
 580       intelDestroyContext(driContextPriv);
 581    } else {
 582       *error = __DRI_CTX_ERROR_NO_MEMORY;
 583       fprintf(stderr, "Unrecognized deviceID 0x%x\n", intelScreen->deviceID);
 584    }
 585
 586    return false;
 587 }
 588
 589 static bool
 590 intel_init_bufmgr(struct intel_screen *intelScreen)
 591 {
 592    __DRIscreen *spriv = intelScreen->driScrnPriv;
 593    int num_fences = 0;
 594
 595    intelScreen->no_hw = (getenv("INTEL_NO_HW") != NULL ||
 596                          getenv("INTEL_DEVID_OVERRIDE") != NULL);
 597
 598    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 599    if (intelScreen->bufmgr == NULL) {
 600       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 601               __func__, __LINE__);
 602       return false;
 603    }
 604
 605    if (!intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences) ||
 606        num_fences == 0) {
 607       fprintf(stderr, "[%s: %u] Kernel 2.6.29 required.\n", __func__, __LINE__);
 608       return false;
 609    }
 610
 611    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 612
 613    intelScreen->named_regions = _mesa_NewHashTable();
 614
 615    intelScreen->relaxed_relocations = 0;
 616    intelScreen->relaxed_relocations |=
 617       intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA) << 0;
 618
 619    return true;
 620 }
 621
 622 /**
 623  * Override intel_screen.hw_has_hiz with environment variable INTEL_HIZ.
 624  *
 625  * Valid values for INTEL_HIZ are "0" and "1". If an invalid valid value is
 626  * encountered, a warning is emitted and INTEL_HIZ is ignored.
 627  */
 628 static void
 629 intel_override_hiz(struct intel_screen *intel)
 630 {
 631    const char *s = getenv("INTEL_HIZ");
 632    if (!s) {
 633       return;
 634    } else if (!strncmp("0", s, 2)) {
 635       intel->hw_has_hiz = false;
 636    } else if (!strncmp("1", s, 2)) {
 637       intel->hw_has_hiz = true;
 638    } else {
 639       fprintf(stderr,
 640               "warning: env variable INTEL_HIZ=\"%s\" has invalid value "
 641               "and is ignored", s);
 642    }
 643 }
 644
 645 /**
 646  * Override intel_screen.hw_has_separate_stencil with environment variable
 647  * INTEL_SEPARATE_STENCIL.
 648  *
 649  * Valid values for INTEL_SEPARATE_STENCIL are "0" and "1". If an invalid
 650  * valid value is encountered, a warning is emitted and INTEL_SEPARATE_STENCIL
 651  * is ignored.
 652  */
 653 static void
 654 intel_override_separate_stencil(struct intel_screen *screen)
 655 {
 656    const char *s = getenv("INTEL_SEPARATE_STENCIL");
 657    if (!s) {
 658       return;
 659    } else if (!strncmp("0", s, 2)) {
 660       screen->hw_has_separate_stencil = false;
 661    } else if (!strncmp("1", s, 2)) {
 662       screen->hw_has_separate_stencil = true;
 663    } else {
 664       fprintf(stderr,
 665               "warning: env variable INTEL_SEPARATE_STENCIL=\"%s\" has "
 666               "invalid value and is ignored", s);
 667    }
 668 }
 669
 670 /**
 671  * This is the driver specific part of the createNewScreen entry point.
 672  * Called when using DRI2.
 673  *
 674  * \return the struct gl_config supported by this driver
 675  */
 676 static const
 677 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
 678 {
 679    struct intel_screen *intelScreen;
 680    GLenum fb_format[3];
 681    GLenum fb_type[3];
 682    unsigned int api_mask;
 683    char *devid_override;
 684
 685    static const GLenum back_buffer_modes[] = {
 686        GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 687    };
 688    uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
 689    int color;
 690    __DRIconfig **configs = NULL;
 691
 692    /* Allocate the private area */
 693    intelScreen = CALLOC(sizeof *intelScreen);
 694    if (!intelScreen) {
 695       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
 696       return false;
 697    }
 698    /* parse information in __driConfigOptions */
 699    driParseOptionInfo(&intelScreen->optionCache,
 700                       __driConfigOptions, __driNConfigOptions);
 701
 702    intelScreen->driScrnPriv = psp;
 703    psp->driverPrivate = (void *) intelScreen;
 704
 705    /* Determine chipset ID */
 706    if (!intel_get_param(psp, I915_PARAM_CHIPSET_ID,
 707                         &intelScreen->deviceID))
 708       return false;
 709
 710    /* Allow an override of the device ID for the purpose of making the
 711     * driver produce dumps for debugging of new chipset enablement.
 712     * This implies INTEL_NO_HW, to avoid programming your actual GPU
 713     * incorrectly.
 714     */
 715    devid_override = getenv("INTEL_DEVID_OVERRIDE");
 716    if (devid_override) {
 717       intelScreen->deviceID = strtod(devid_override, NULL);
 718    }
 719
 720    intelScreen->kernel_has_gen7_sol_reset =
 721       intel_get_boolean(intelScreen->driScrnPriv,
 722                         I915_PARAM_HAS_GEN7_SOL_RESET);
 723
 724    if (IS_GEN7(intelScreen->deviceID)) {
 725       intelScreen->gen = 7;
 726    } else if (IS_GEN6(intelScreen->deviceID)) {
 727       intelScreen->gen = 6;
 728    } else if (IS_GEN5(intelScreen->deviceID)) {
 729       intelScreen->gen = 5;
 730    } else if (IS_965(intelScreen->deviceID)) {
 731       intelScreen->gen = 4;
 732    } else if (IS_9XX(intelScreen->deviceID)) {
 733       intelScreen->gen = 3;
 734    } else {
 735       intelScreen->gen = 2;
 736    }
 737
 738    intelScreen->hw_has_separate_stencil = intelScreen->gen >= 6;
 739    intelScreen->hw_must_use_separate_stencil = intelScreen->gen >= 7;
 740    intelScreen->hw_has_hiz = intelScreen->gen >= 6;
 741    intelScreen->dri2_has_hiz = INTEL_DRI2_HAS_HIZ_UNKNOWN;
 742
 743 #if defined(I915_PARAM_HAS_LLC)
 744    intelScreen->hw_has_llc =
 745       intel_get_boolean(intelScreen->driScrnPriv,
 746               I915_PARAM_HAS_LLC);
 747 #else
 748    intelScreen->hw_has_llc = intelScreen->gen >= 6;
 749 #endif
 750
 751    intel_override_hiz(intelScreen);
 752    intel_override_separate_stencil(intelScreen);
 753
 754    api_mask = (1 << __DRI_API_OPENGL);
 755 #if FEATURE_ES1
 756    api_mask |= (1 << __DRI_API_GLES);
 757 #endif
 758 #if FEATURE_ES2
 759    api_mask |= (1 << __DRI_API_GLES2);
 760 #endif
 761
 762    if (IS_9XX(intelScreen->deviceID) || IS_965(intelScreen->deviceID))
 763       psp->api_mask = api_mask;
 764
 765    if (!intel_init_bufmgr(intelScreen))
 766        return false;
 767
 768    psp->extensions = intelScreenExtensions;
 769
 770    msaa_samples_array[0] = 0;
 771
 772    fb_format[0] = GL_RGB;
 773    fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
 774
 775    fb_format[1] = GL_BGR;
 776    fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
 777
 778    fb_format[2] = GL_BGRA;
 779    fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
 780
 781    depth_bits[0] = 0;
 782    stencil_bits[0] = 0;
 783
 784    /* Generate a rich set of useful configs that do not include an
 785     * accumulation buffer.
 786     */
 787    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 788       __DRIconfig **new_configs;
 789       int depth_factor;
 790
 791       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
 792        * buffer that has a diffferent number of bits per pixel than the color
 793        * buffer.  This isn't yet supported here.
 794        */
 795       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 796          depth_bits[1] = 16;
 797          stencil_bits[1] = 0;
 798       } else {
 799          depth_bits[1] = 24;
 800          stencil_bits[1] = 8;
 801       }
 802
 803       depth_factor = 2;
 804
 805       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 806                                      depth_bits,
 807                                      stencil_bits,
 808                                      depth_factor,
 809                                      back_buffer_modes,
 810                                      ARRAY_SIZE(back_buffer_modes),
 811                                      msaa_samples_array,
 812                                      ARRAY_SIZE(msaa_samples_array),
 813                                      false);
 814       if (configs == NULL)
 815          configs = new_configs;
 816       else
 817          configs = driConcatConfigs(configs, new_configs);
 818    }
 819
 820    /* Generate the minimum possible set of configs that include an
 821     * accumulation buffer.
 822     */
 823    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 824       __DRIconfig **new_configs;
 825
 826       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 827          depth_bits[0] = 16;
 828          stencil_bits[0] = 0;
 829       } else {
 830          depth_bits[0] = 24;
 831          stencil_bits[0] = 8;
 832       }
 833
 834       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 835                                      depth_bits, stencil_bits, 1,
 836                                      back_buffer_modes + 1, 1,
 837                                      msaa_samples_array, 1,
 838                                      true);
 839       if (configs == NULL)
 840          configs = new_configs;
 841       else
 842          configs = driConcatConfigs(configs, new_configs);
 843    }
 844
 845    if (configs == NULL) {
 846       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 847               __LINE__);
 848       return NULL;
 849    }
 850
 851    return (const __DRIconfig **)configs;
 852 }
 853
 854 struct intel_buffer {
 855    __DRIbuffer base;
 856    struct intel_region *region;
 857 };
 858
 859 /**
 860  * \brief Get tiling format for a DRI buffer.
 861  *
 862  * \param attachment is the buffer's attachmet point, such as
 863  *        __DRI_BUFFER_DEPTH.
 864  * \param out_tiling is the returned tiling format for buffer.
 865  * \return false if attachment is unrecognized or is incompatible with screen.
 866  */
 867 static bool
 868 intel_get_dri_buffer_tiling(struct intel_screen *screen,
 869                             uint32_t attachment,
 870                             uint32_t *out_tiling)
 871 {
 872    if (screen->gen < 4) {
 873       *out_tiling = I915_TILING_X;
 874       return true;
 875    }
 876
 877    switch (attachment) {
 878    case __DRI_BUFFER_DEPTH:
 879    case __DRI_BUFFER_DEPTH_STENCIL:
 880    case __DRI_BUFFER_HIZ:
 881       *out_tiling = I915_TILING_Y;
 882       return true;
 883    case __DRI_BUFFER_ACCUM:
 884    case __DRI_BUFFER_FRONT_LEFT:
 885    case __DRI_BUFFER_FRONT_RIGHT:
 886    case __DRI_BUFFER_BACK_LEFT:
 887    case __DRI_BUFFER_BACK_RIGHT:
 888    case __DRI_BUFFER_FAKE_FRONT_LEFT:
 889    case __DRI_BUFFER_FAKE_FRONT_RIGHT:
 890       *out_tiling = I915_TILING_X;
 891       return true;
 892    case __DRI_BUFFER_STENCIL:
 893       /* The stencil buffer is W tiled. However, we request from the kernel
 894        * a non-tiled buffer because the GTT is incapable of W fencing.
 895        */
 896       *out_tiling = I915_TILING_NONE;
 897       return true;
 898    default:
 899       if(unlikely(INTEL_DEBUG & DEBUG_DRI)) {
 900          fprintf(stderr, "error: %s: unrecognized DRI buffer attachment 0x%x\n",
 901                  __FUNCTION__, attachment);
 902       }
 903        return false;
 904    }
 905 }
 906
 907 static __DRIbuffer *
 908 intelAllocateBuffer(__DRIscreen *screen,
 909                     unsigned attachment, unsigned format,
 910                     int width, int height)
 911 {
 912    struct intel_buffer *intelBuffer;
 913    struct intel_screen *intelScreen = screen->driverPrivate;
 914
 915    uint32_t tiling;
 916    uint32_t region_width;
 917    uint32_t region_height;
 918    uint32_t region_cpp;
 919
 920    bool ok = true;
 921
 922    ok = intel_get_dri_buffer_tiling(intelScreen, attachment, &tiling);
 923    if (!ok)
 924       return NULL;
 925
 926    intelBuffer = CALLOC(sizeof *intelBuffer);
 927    if (intelBuffer == NULL)
 928       return NULL;
 929
 930    if (attachment == __DRI_BUFFER_STENCIL) {
 931       /* The stencil buffer has quirky pitch requirements.  From Vol 2a,
 932        * 11.5.6.2.1 3DSTATE_STENCIL_BUFFER, field "Surface Pitch":
 933        *    The pitch must be set to 2x the value computed based on width, as
 934        *    the stencil buffer is stored with two rows interleaved.
 935        * To accomplish this, we resort to the nasty hack of doubling the
 936        * region's cpp and halving its height.
 937        */
 938       region_width = ALIGN(width, 64);
 939       region_height = ALIGN(ALIGN(height, 2) / 2, 64);
 940       region_cpp = format / 4;
 941    } else {
 942       region_width = width;
 943       region_height = height;
 944       region_cpp = format / 8;
 945    }
 946
 947    intelBuffer->region = intel_region_alloc(intelScreen,
 948                                             tiling,
 949                                             region_cpp,
 950                                             region_width,
 951                                             region_height,
 952                                             true);
 953
 954    if (intelBuffer->region == NULL) {
 955            FREE(intelBuffer);
 956            return NULL;
 957    }
 958
 959    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
 960
 961    intelBuffer->base.attachment = attachment;
 962    intelBuffer->base.cpp = intelBuffer->region->cpp;
 963    intelBuffer->base.pitch =
 964          intelBuffer->region->pitch * intelBuffer->region->cpp;
 965
 966    return &intelBuffer->base;
 967 }
 968
 969 static void
 970 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 971 {
 972    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
 973
 974    intel_region_release(&intelBuffer->region);
 975    free(intelBuffer);
 976 }
 977
 978
 979 const struct __DriverAPIRec driDriverAPI = {
 980    .InitScreen           = intelInitScreen2,
 981    .DestroyScreen        = intelDestroyScreen,
 982    .CreateContext        = intelCreateContext,
 983    .DestroyContext       = intelDestroyContext,
 984    .CreateBuffer         = intelCreateBuffer,
 985    .DestroyBuffer        = intelDestroyBuffer,
 986    .MakeCurrent          = intelMakeCurrent,
 987    .UnbindContext        = intelUnbindContext,
 988    .AllocateBuffer       = intelAllocateBuffer,
 989    .ReleaseBuffer        = intelReleaseBuffer
 990 };
 991
 992 /* This is the table of extensions that the loader will dlsym() for. */
 993 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 994     &driCoreExtension.base,
 995     &driDRI2Extension.base,
 996     NULL
 997 };