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