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(hiz, bool, true)
  61          DRI_CONF_DESC(en, "Enable Hierarchical Z on gen6+")
  62       DRI_CONF_OPT_END
  63
  64       DRI_CONF_OPT_BEGIN(early_z, bool, false)
  65          DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
  66       DRI_CONF_OPT_END
  67
  68       DRI_CONF_OPT_BEGIN(fragment_shader, bool, true)
  69          DRI_CONF_DESC(en, "Enable limited ARB_fragment_shader support on 915/945.")
  70       DRI_CONF_OPT_END
  71
  72    DRI_CONF_SECTION_END
  73    DRI_CONF_SECTION_QUALITY
  74       DRI_CONF_FORCE_S3TC_ENABLE(false)
  75       DRI_CONF_ALLOW_LARGE_TEXTURES(2)
  76    DRI_CONF_SECTION_END
  77    DRI_CONF_SECTION_DEBUG
  78      DRI_CONF_NO_RAST(false)
  79      DRI_CONF_ALWAYS_FLUSH_BATCH(false)
  80      DRI_CONF_ALWAYS_FLUSH_CACHE(false)
  81      DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN(false)
  82
  83       DRI_CONF_OPT_BEGIN(stub_occlusion_query, bool, false)
  84          DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
  85       DRI_CONF_OPT_END
  86
  87       DRI_CONF_OPT_BEGIN(shader_precompile, bool, false)
  88          DRI_CONF_DESC(en, "Perform code generation at shader link time.")
  89       DRI_CONF_OPT_END
  90    DRI_CONF_SECTION_END
  91 DRI_CONF_END;
  92
  93 const GLuint __driNConfigOptions = 14;
  94
  95 #include "intel_batchbuffer.h"
  96 #include "intel_buffers.h"
  97 #include "intel_bufmgr.h"
  98 #include "intel_chipset.h"
  99 #include "intel_fbo.h"
 100 #include "intel_mipmap_tree.h"
 101 #include "intel_screen.h"
 102 #include "intel_tex.h"
 103 #include "intel_regions.h"
 104
 105 #include "i915_drm.h"
 106
 107 #ifdef USE_NEW_INTERFACE
 108 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
 109 #endif /*USE_NEW_INTERFACE */
 110
 111 void
 112 aub_dump_bmp(struct gl_context *ctx)
 113 {
 114    struct gl_framebuffer *fb = ctx->DrawBuffer;
 115
 116    for (int i = 0; i < fb->_NumColorDrawBuffers; i++) {
 117       struct intel_renderbuffer *irb =
 118          intel_renderbuffer(fb->_ColorDrawBuffers[i]);
 119
 120       if (irb && irb->mt) {
 121          enum aub_dump_bmp_format format;
 122
 123          switch (irb->Base.Base.Format) {
 124          case MESA_FORMAT_ARGB8888:
 125          case MESA_FORMAT_XRGB8888:
 126             format = AUB_DUMP_BMP_FORMAT_ARGB_8888;
 127             break;
 128          default:
 129             continue;
 130          }
 131
 132          drm_intel_gem_bo_aub_dump_bmp(irb->mt->region->bo,
 133                                        irb->draw_x,
 134                                        irb->draw_y,
 135                                        irb->Base.Base.Width,
 136                                        irb->Base.Base.Height,
 137                                        format,
 138                                        irb->mt->region->pitch *
 139                                        irb->mt->region->cpp,
 140                                        0);
 141       }
 142    }
 143 }
 144
 145 static const __DRItexBufferExtension intelTexBufferExtension = {
 146     { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 147    intelSetTexBuffer,
 148    intelSetTexBuffer2,
 149 };
 150
 151 static void
 152 intelDRI2Flush(__DRIdrawable *drawable)
 153 {
 154    GET_CURRENT_CONTEXT(ctx);
 155    struct intel_context *intel = intel_context(ctx);
 156    if (intel == NULL)
 157       return;
 158
 159    if (intel->gen < 4)
 160       INTEL_FIREVERTICES(intel);
 161
 162    intel->need_throttle = true;
 163
 164    if (intel->batch.used)
 165       intel_batchbuffer_flush(intel);
 166
 167    if (INTEL_DEBUG & DEBUG_AUB) {
 168       aub_dump_bmp(ctx);
 169    }
 170 }
 171
 172 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 173     { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
 174     intelDRI2Flush,
 175     dri2InvalidateDrawable,
 176 };
 177
 178 static __DRIimage *
 179 intel_create_image_from_name(__DRIscreen *screen,
 180                              int width, int height, int format,
 181                              int name, int pitch, void *loaderPrivate)
 182 {
 183     struct intel_screen *intelScreen = screen->driverPrivate;
 184     __DRIimage *image;
 185     int cpp;
 186
 187     image = CALLOC(sizeof *image);
 188     if (image == NULL)
 189         return NULL;
 190
 191     image->dri_format = format;
 192
 193     switch (format) {
 194     case __DRI_IMAGE_FORMAT_RGB565:
 195        image->format = MESA_FORMAT_RGB565;
 196        image->internal_format = GL_RGB;
 197        image->data_type = GL_UNSIGNED_BYTE;
 198        break;
 199     case __DRI_IMAGE_FORMAT_XRGB8888:
 200        image->format = MESA_FORMAT_XRGB8888;
 201        image->internal_format = GL_RGB;
 202        image->data_type = GL_UNSIGNED_BYTE;
 203        break;
 204     case __DRI_IMAGE_FORMAT_ARGB8888:
 205        image->format = MESA_FORMAT_ARGB8888;
 206        image->internal_format = GL_RGBA;
 207        image->data_type = GL_UNSIGNED_BYTE;
 208        break;
 209     case __DRI_IMAGE_FORMAT_ABGR8888:
 210        image->format = MESA_FORMAT_RGBA8888_REV;
 211        image->internal_format = GL_RGBA;
 212        image->data_type = GL_UNSIGNED_BYTE;
 213        break;
 214     default:
 215        free(image);
 216        return NULL;
 217     }
 218
 219     image->data = loaderPrivate;
 220     cpp = _mesa_get_format_bytes(image->format);
 221
 222     image->region = intel_region_alloc_for_handle(intelScreen,
 223                                                   cpp, width, height,
 224                                                   pitch, name, "image");
 225     if (image->region == NULL) {
 226        FREE(image);
 227        return NULL;
 228     }
 229
 230     return image;
 231 }
 232
 233 static __DRIimage *
 234 intel_create_image_from_renderbuffer(__DRIcontext *context,
 235                                      int renderbuffer, void *loaderPrivate)
 236 {
 237    __DRIimage *image;
 238    struct intel_context *intel = context->driverPrivate;
 239    struct gl_renderbuffer *rb;
 240    struct intel_renderbuffer *irb;
 241
 242    rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
 243    if (!rb) {
 244       _mesa_error(&intel->ctx,
 245                   GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 246       return NULL;
 247    }
 248
 249    irb = intel_renderbuffer(rb);
 250    image = CALLOC(sizeof *image);
 251    if (image == NULL)
 252       return NULL;
 253
 254    image->internal_format = rb->InternalFormat;
 255    image->format = rb->Format;
 256    image->data_type = GL_UNSIGNED_BYTE;
 257    image->data = loaderPrivate;
 258    intel_region_reference(&image->region, irb->mt->region);
 259
 260    switch (image->format) {
 261    case MESA_FORMAT_RGB565:
 262       image->dri_format = __DRI_IMAGE_FORMAT_RGB565;
 263       break;
 264    case MESA_FORMAT_XRGB8888:
 265       image->dri_format = __DRI_IMAGE_FORMAT_XRGB8888;
 266       break;
 267    case MESA_FORMAT_ARGB8888:
 268       image->dri_format = __DRI_IMAGE_FORMAT_ARGB8888;
 269       break;
 270    case MESA_FORMAT_RGBA8888_REV:
 271       image->dri_format = __DRI_IMAGE_FORMAT_ABGR8888;
 272       break;
 273    }
 274
 275    return image;
 276 }
 277
 278 static void
 279 intel_destroy_image(__DRIimage *image)
 280 {
 281     intel_region_release(&image->region);
 282     FREE(image);
 283 }
 284
 285 static __DRIimage *
 286 intel_create_image(__DRIscreen *screen,
 287                    int width, int height, int format,
 288                    unsigned int use,
 289                    void *loaderPrivate)
 290 {
 291    __DRIimage *image;
 292    struct intel_screen *intelScreen = screen->driverPrivate;
 293    uint32_t tiling;
 294    int cpp;
 295
 296    tiling = I915_TILING_X;
 297    if (use & __DRI_IMAGE_USE_CURSOR) {
 298       if (width != 64 || height != 64)
 299          return NULL;
 300       tiling = I915_TILING_NONE;
 301    }
 302
 303    image = CALLOC(sizeof *image);
 304    if (image == NULL)
 305       return NULL;
 306
 307    image->dri_format = format;
 308
 309    switch (format) {
 310    case __DRI_IMAGE_FORMAT_RGB565:
 311       image->format = MESA_FORMAT_RGB565;
 312       image->internal_format = GL_RGB;
 313       image->data_type = GL_UNSIGNED_BYTE;
 314       break;
 315    case __DRI_IMAGE_FORMAT_XRGB8888:
 316       image->format = MESA_FORMAT_XRGB8888;
 317       image->internal_format = GL_RGB;
 318       image->data_type = GL_UNSIGNED_BYTE;
 319       break;
 320    case __DRI_IMAGE_FORMAT_ARGB8888:
 321       image->format = MESA_FORMAT_ARGB8888;
 322       image->internal_format = GL_RGBA;
 323       image->data_type = GL_UNSIGNED_BYTE;
 324       break;
 325     case __DRI_IMAGE_FORMAT_ABGR8888:
 326        image->format = MESA_FORMAT_RGBA8888_REV;
 327        image->internal_format = GL_RGBA;
 328        image->data_type = GL_UNSIGNED_BYTE;
 329        break;
 330    default:
 331       free(image);
 332       return NULL;
 333    }
 334
 335    image->data = loaderPrivate;
 336    cpp = _mesa_get_format_bytes(image->format);
 337
 338    image->region =
 339       intel_region_alloc(intelScreen, tiling,
 340                          cpp, width, height, true);
 341    if (image->region == NULL) {
 342       FREE(image);
 343       return NULL;
 344    }
 345
 346    return image;
 347 }
 348
 349 static GLboolean
 350 intel_query_image(__DRIimage *image, int attrib, int *value)
 351 {
 352    switch (attrib) {
 353    case __DRI_IMAGE_ATTRIB_STRIDE:
 354       *value = image->region->pitch * image->region->cpp;
 355       return true;
 356    case __DRI_IMAGE_ATTRIB_HANDLE:
 357       *value = image->region->bo->handle;
 358       return true;
 359    case __DRI_IMAGE_ATTRIB_NAME:
 360       return intel_region_flink(image->region, (uint32_t *) value);
 361    case __DRI_IMAGE_ATTRIB_FORMAT:
 362       *value = image->dri_format;
 363       return true;
 364    default:
 365       return false;
 366    }
 367 }
 368
 369 static __DRIimage *
 370 intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
 371 {
 372    __DRIimage *image;
 373
 374    image = CALLOC(sizeof *image);
 375    if (image == NULL)
 376       return NULL;
 377
 378    intel_region_reference(&image->region, orig_image->region);
 379    if (image->region == NULL) {
 380       FREE(image);
 381       return NULL;
 382    }
 383
 384    image->internal_format = orig_image->internal_format;
 385    image->dri_format      = orig_image->dri_format;
 386    image->format          = orig_image->format;
 387    image->data_type       = orig_image->data_type;
 388    image->data            = loaderPrivate;
 389
 390    return image;
 391 }
 392
 393 static GLboolean
 394 intel_validate_usage(__DRIimage *image, unsigned int use)
 395 {
 396    if (use & __DRI_IMAGE_USE_CURSOR) {
 397       if (image->region->width != 64 || image->region->height != 64)
 398          return GL_FALSE;
 399    }
 400
 401    return GL_TRUE;
 402 }
 403
 404 static struct __DRIimageExtensionRec intelImageExtension = {
 405     { __DRI_IMAGE, 3 },
 406     intel_create_image_from_name,
 407     intel_create_image_from_renderbuffer,
 408     intel_destroy_image,
 409     intel_create_image,
 410     intel_query_image,
 411     intel_dup_image,
 412     intel_validate_usage
 413 };
 414
 415 static const __DRIextension *intelScreenExtensions[] = {
 416     &intelTexBufferExtension.base,
 417     &intelFlushExtension.base,
 418     &intelImageExtension.base,
 419     &dri2ConfigQueryExtension.base,
 420     NULL
 421 };
 422
 423 static bool
 424 intel_get_param(__DRIscreen *psp, int param, int *value)
 425 {
 426    int ret;
 427    struct drm_i915_getparam gp;
 428
 429    memset(&gp, 0, sizeof(gp));
 430    gp.param = param;
 431    gp.value = value;
 432
 433    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 434    if (ret) {
 435       if (ret != -EINVAL)
 436          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 437       return false;
 438    }
 439
 440    return true;
 441 }
 442
 443 static bool
 444 intel_get_boolean(__DRIscreen *psp, int param)
 445 {
 446    int value = 0;
 447    return intel_get_param(psp, param, &value) && value;
 448 }
 449
 450 static void
 451 nop_callback(GLuint key, void *data, void *userData)
 452 {
 453 }
 454
 455 static void
 456 intelDestroyScreen(__DRIscreen * sPriv)
 457 {
 458    struct intel_screen *intelScreen = sPriv->driverPrivate;
 459
 460    dri_bufmgr_destroy(intelScreen->bufmgr);
 461    driDestroyOptionInfo(&intelScreen->optionCache);
 462
 463    /* Some regions may still have references to them at this point, so
 464     * flush the hash table to prevent _mesa_DeleteHashTable() from
 465     * complaining about the hash not being empty; */
 466    _mesa_HashDeleteAll(intelScreen->named_regions, nop_callback, NULL);
 467    _mesa_DeleteHashTable(intelScreen->named_regions);
 468
 469    FREE(intelScreen);
 470    sPriv->driverPrivate = NULL;
 471 }
 472
 473
 474 /**
 475  * This is called when we need to set up GL rendering to a new X window.
 476  */
 477 static GLboolean
 478 intelCreateBuffer(__DRIscreen * driScrnPriv,
 479                   __DRIdrawable * driDrawPriv,
 480                   const struct gl_config * mesaVis, GLboolean isPixmap)
 481 {
 482    struct intel_renderbuffer *rb;
 483    struct intel_screen *screen = (struct intel_screen*) driScrnPriv->driverPrivate;
 484
 485    if (isPixmap) {
 486       return false;          /* not implemented */
 487    }
 488    else {
 489       gl_format rgbFormat;
 490
 491       struct gl_framebuffer *fb = CALLOC_STRUCT(gl_framebuffer);
 492
 493       if (!fb)
 494          return false;
 495
 496       _mesa_initialize_window_framebuffer(fb, mesaVis);
 497
 498       if (mesaVis->redBits == 5)
 499          rgbFormat = MESA_FORMAT_RGB565;
 500       else if (mesaVis->alphaBits == 0)
 501          rgbFormat = MESA_FORMAT_XRGB8888;
 502       else
 503          rgbFormat = MESA_FORMAT_ARGB8888;
 504
 505       /* setup the hardware-based renderbuffers */
 506       rb = intel_create_renderbuffer(rgbFormat);
 507       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base.Base);
 508
 509       if (mesaVis->doubleBufferMode) {
 510          rb = intel_create_renderbuffer(rgbFormat);
 511          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base.Base);
 512       }
 513
 514       /*
 515        * Assert here that the gl_config has an expected depth/stencil bit
 516        * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
 517        * which constructs the advertised configs.)
 518        */
 519       if (mesaVis->depthBits == 24) {
 520          assert(mesaVis->stencilBits == 8);
 521
 522          if (screen->hw_has_separate_stencil
 523              && screen->dri2_has_hiz != INTEL_DRI2_HAS_HIZ_FALSE) {
 524             /*
 525              * Request a separate stencil buffer even if we do not yet know if
 526              * the screen supports it. (See comments for
 527              * enum intel_dri2_has_hiz).
 528              */
 529             rb = intel_create_renderbuffer(MESA_FORMAT_X8_Z24);
 530             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 531             rb = intel_create_renderbuffer(MESA_FORMAT_S8);
 532             _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 533          } else {
 534             /*
 535              * Use combined depth/stencil. Note that the renderbuffer is
 536              * attached to two attachment points.
 537              */
 538             rb = intel_create_renderbuffer(MESA_FORMAT_S8_Z24);
 539             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 540             _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 541          }
 542       }
 543       else if (mesaVis->depthBits == 16) {
 544          assert(mesaVis->stencilBits == 0);
 545          /* just 16-bit depth buffer, no hw stencil */
 546          struct intel_renderbuffer *depthRb
 547             = intel_create_renderbuffer(MESA_FORMAT_Z16);
 548          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base.Base);
 549       }
 550       else {
 551          assert(mesaVis->depthBits == 0);
 552          assert(mesaVis->stencilBits == 0);
 553       }
 554
 555       /* now add any/all software-based renderbuffers we may need */
 556       _swrast_add_soft_renderbuffers(fb,
 557                                      false, /* never sw color */
 558                                      false, /* never sw depth */
 559                                      false, /* never sw stencil */
 560                                      mesaVis->accumRedBits > 0,
 561                                      false, /* never sw alpha */
 562                                      false  /* never sw aux */ );
 563       driDrawPriv->driverPrivate = fb;
 564
 565       return true;
 566    }
 567 }
 568
 569 static void
 570 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 571 {
 572     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 573
 574     _mesa_reference_framebuffer(&fb, NULL);
 575 }
 576
 577 /* There are probably better ways to do this, such as an
 578  * init-designated function to register chipids and createcontext
 579  * functions.
 580  */
 581 extern bool
 582 i830CreateContext(const struct gl_config *mesaVis,
 583                   __DRIcontext *driContextPriv,
 584                   void *sharedContextPrivate);
 585
 586 extern bool
 587 i915CreateContext(int api,
 588                   const struct gl_config *mesaVis,
 589                   __DRIcontext *driContextPriv,
 590                   void *sharedContextPrivate);
 591 extern bool
 592 brwCreateContext(int api,
 593                  const struct gl_config *mesaVis,
 594                  __DRIcontext *driContextPriv,
 595                  void *sharedContextPrivate);
 596
 597 static GLboolean
 598 intelCreateContext(gl_api api,
 599                    const struct gl_config * mesaVis,
 600                    __DRIcontext * driContextPriv,
 601                    unsigned major_version,
 602                    unsigned minor_version,
 603                    uint32_t flags,
 604                    unsigned *error,
 605                    void *sharedContextPrivate)
 606 {
 607    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 608    struct intel_screen *intelScreen = sPriv->driverPrivate;
 609    bool success = false;
 610
 611 #ifdef I915
 612    if (IS_9XX(intelScreen->deviceID)) {
 613       if (!IS_965(intelScreen->deviceID)) {
 614          success = i915CreateContext(api, mesaVis, driContextPriv,
 615                                      sharedContextPrivate);
 616       }
 617    } else {
 618       intelScreen->no_vbo = true;
 619       success = i830CreateContext(mesaVis, driContextPriv,
 620                                   sharedContextPrivate);
 621    }
 622 #else
 623    if (IS_965(intelScreen->deviceID))
 624       success = brwCreateContext(api, mesaVis,
 625                               driContextPriv,
 626                               sharedContextPrivate);
 627 #endif
 628
 629    if (success) {
 630       struct gl_context *ctx =
 631          (struct gl_context *) driContextPriv->driverPrivate;
 632
 633       _mesa_compute_version(ctx);
 634       if (ctx->VersionMajor > major_version
 635           || (ctx->VersionMajor == major_version
 636               && ctx->VersionMinor >= minor_version)) {
 637          *error = __DRI_CTX_ERROR_BAD_VERSION;
 638          return true;
 639       }
 640
 641       intelDestroyContext(driContextPriv);
 642    } else {
 643       *error = __DRI_CTX_ERROR_NO_MEMORY;
 644       fprintf(stderr, "Unrecognized deviceID 0x%x\n", intelScreen->deviceID);
 645    }
 646
 647    return false;
 648 }
 649
 650 static bool
 651 intel_init_bufmgr(struct intel_screen *intelScreen)
 652 {
 653    __DRIscreen *spriv = intelScreen->driScrnPriv;
 654    int num_fences = 0;
 655
 656    intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
 657
 658    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 659    if (intelScreen->bufmgr == NULL) {
 660       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 661               __func__, __LINE__);
 662       return false;
 663    }
 664
 665    if (!intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences) ||
 666        num_fences == 0) {
 667       fprintf(stderr, "[%s: %u] Kernel 2.6.29 required.\n", __func__, __LINE__);
 668       return false;
 669    }
 670
 671    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 672
 673    intelScreen->named_regions = _mesa_NewHashTable();
 674
 675    intelScreen->relaxed_relocations = 0;
 676    intelScreen->relaxed_relocations |=
 677       intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA) << 0;
 678
 679    return true;
 680 }
 681
 682 /**
 683  * Override intel_screen.hw_has_separate_stencil with environment variable
 684  * INTEL_SEPARATE_STENCIL.
 685  *
 686  * Valid values for INTEL_SEPARATE_STENCIL are "0" and "1". If an invalid
 687  * valid value is encountered, a warning is emitted and INTEL_SEPARATE_STENCIL
 688  * is ignored.
 689  */
 690 static void
 691 intel_override_separate_stencil(struct intel_screen *screen)
 692 {
 693    const char *s = getenv("INTEL_SEPARATE_STENCIL");
 694    if (!s) {
 695       return;
 696    } else if (!strncmp("0", s, 2)) {
 697       screen->hw_has_separate_stencil = false;
 698    } else if (!strncmp("1", s, 2)) {
 699       screen->hw_has_separate_stencil = true;
 700    } else {
 701       fprintf(stderr,
 702               "warning: env variable INTEL_SEPARATE_STENCIL=\"%s\" has "
 703               "invalid value and is ignored", s);
 704    }
 705 }
 706
 707 static bool
 708 intel_detect_swizzling(struct intel_screen *screen)
 709 {
 710    drm_intel_bo *buffer;
 711    unsigned long flags = 0;
 712    unsigned long aligned_pitch;
 713    uint32_t tiling = I915_TILING_X;
 714    uint32_t swizzle_mode = 0;
 715
 716    buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "swizzle test",
 717                                      64, 64, 4,
 718                                      &tiling, &aligned_pitch, flags);
 719    if (buffer == NULL)
 720       return false;
 721
 722    drm_intel_bo_get_tiling(buffer, &tiling, &swizzle_mode);
 723    drm_intel_bo_unreference(buffer);
 724
 725    if (swizzle_mode == I915_BIT_6_SWIZZLE_NONE)
 726       return false;
 727    else
 728       return true;
 729 }
 730
 731 /**
 732  * This is the driver specific part of the createNewScreen entry point.
 733  * Called when using DRI2.
 734  *
 735  * \return the struct gl_config supported by this driver
 736  */
 737 static const
 738 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
 739 {
 740    struct intel_screen *intelScreen;
 741    GLenum fb_format[3];
 742    GLenum fb_type[3];
 743    unsigned int api_mask;
 744
 745    static const GLenum back_buffer_modes[] = {
 746        GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 747    };
 748    uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
 749    int color;
 750    __DRIconfig **configs = NULL;
 751
 752    /* Allocate the private area */
 753    intelScreen = CALLOC(sizeof *intelScreen);
 754    if (!intelScreen) {
 755       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
 756       return false;
 757    }
 758    /* parse information in __driConfigOptions */
 759    driParseOptionInfo(&intelScreen->optionCache,
 760                       __driConfigOptions, __driNConfigOptions);
 761
 762    intelScreen->driScrnPriv = psp;
 763    psp->driverPrivate = (void *) intelScreen;
 764
 765    if (!intel_init_bufmgr(intelScreen))
 766        return false;
 767
 768    intelScreen->deviceID = drm_intel_bufmgr_gem_get_devid(intelScreen->bufmgr);
 769
 770    intelScreen->kernel_has_gen7_sol_reset =
 771       intel_get_boolean(intelScreen->driScrnPriv,
 772                         I915_PARAM_HAS_GEN7_SOL_RESET);
 773
 774    if (IS_GEN7(intelScreen->deviceID)) {
 775       intelScreen->gen = 7;
 776    } else if (IS_GEN6(intelScreen->deviceID)) {
 777       intelScreen->gen = 6;
 778    } else if (IS_GEN5(intelScreen->deviceID)) {
 779       intelScreen->gen = 5;
 780    } else if (IS_965(intelScreen->deviceID)) {
 781       intelScreen->gen = 4;
 782    } else if (IS_9XX(intelScreen->deviceID)) {
 783       intelScreen->gen = 3;
 784    } else {
 785       intelScreen->gen = 2;
 786    }
 787
 788    intelScreen->hw_has_separate_stencil = intelScreen->gen >= 6;
 789    intelScreen->hw_must_use_separate_stencil = intelScreen->gen >= 7;
 790    intelScreen->dri2_has_hiz = INTEL_DRI2_HAS_HIZ_UNKNOWN;
 791
 792    int has_llc = 0;
 793    bool success = intel_get_param(intelScreen->driScrnPriv, I915_PARAM_HAS_LLC,
 794                                   &has_llc);
 795    if (success && has_llc)
 796       intelScreen->hw_has_llc = true;
 797    else if (!success && intelScreen->gen >= 6)
 798       intelScreen->hw_has_llc = true;
 799
 800    intel_override_separate_stencil(intelScreen);
 801
 802    api_mask = (1 << __DRI_API_OPENGL);
 803 #if FEATURE_ES1
 804    api_mask |= (1 << __DRI_API_GLES);
 805 #endif
 806 #if FEATURE_ES2
 807    api_mask |= (1 << __DRI_API_GLES2);
 808 #endif
 809
 810    if (IS_9XX(intelScreen->deviceID) || IS_965(intelScreen->deviceID))
 811       psp->api_mask = api_mask;
 812
 813    intelScreen->hw_has_swizzling = intel_detect_swizzling(intelScreen);
 814
 815    psp->extensions = intelScreenExtensions;
 816
 817    msaa_samples_array[0] = 0;
 818
 819    fb_format[0] = GL_RGB;
 820    fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
 821
 822    fb_format[1] = GL_BGR;
 823    fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
 824
 825    fb_format[2] = GL_BGRA;
 826    fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
 827
 828    depth_bits[0] = 0;
 829    stencil_bits[0] = 0;
 830
 831    /* Generate a rich set of useful configs that do not include an
 832     * accumulation buffer.
 833     */
 834    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 835       __DRIconfig **new_configs;
 836       int depth_factor;
 837
 838       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
 839        * buffer that has a diffferent number of bits per pixel than the color
 840        * buffer.  This isn't yet supported here.
 841        */
 842       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 843          depth_bits[1] = 16;
 844          stencil_bits[1] = 0;
 845       } else {
 846          depth_bits[1] = 24;
 847          stencil_bits[1] = 8;
 848       }
 849
 850       depth_factor = 2;
 851
 852       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 853                                      depth_bits,
 854                                      stencil_bits,
 855                                      depth_factor,
 856                                      back_buffer_modes,
 857                                      ARRAY_SIZE(back_buffer_modes),
 858                                      msaa_samples_array,
 859                                      ARRAY_SIZE(msaa_samples_array),
 860                                      false);
 861       if (configs == NULL)
 862          configs = new_configs;
 863       else
 864          configs = driConcatConfigs(configs, new_configs);
 865    }
 866
 867    /* Generate the minimum possible set of configs that include an
 868     * accumulation buffer.
 869     */
 870    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 871       __DRIconfig **new_configs;
 872
 873       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 874          depth_bits[0] = 16;
 875          stencil_bits[0] = 0;
 876       } else {
 877          depth_bits[0] = 24;
 878          stencil_bits[0] = 8;
 879       }
 880
 881       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 882                                      depth_bits, stencil_bits, 1,
 883                                      back_buffer_modes + 1, 1,
 884                                      msaa_samples_array, 1,
 885                                      true);
 886       if (configs == NULL)
 887          configs = new_configs;
 888       else
 889          configs = driConcatConfigs(configs, new_configs);
 890    }
 891
 892    if (configs == NULL) {
 893       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 894               __LINE__);
 895       return NULL;
 896    }
 897
 898    return (const __DRIconfig **)configs;
 899 }
 900
 901 struct intel_buffer {
 902    __DRIbuffer base;
 903    struct intel_region *region;
 904 };
 905
 906 /**
 907  * \brief Get tiling format for a DRI buffer.
 908  *
 909  * \param attachment is the buffer's attachmet point, such as
 910  *        __DRI_BUFFER_DEPTH.
 911  * \param out_tiling is the returned tiling format for buffer.
 912  * \return false if attachment is unrecognized or is incompatible with screen.
 913  */
 914 static bool
 915 intel_get_dri_buffer_tiling(struct intel_screen *screen,
 916                             uint32_t attachment,
 917                             uint32_t *out_tiling)
 918 {
 919    if (screen->gen < 4) {
 920       *out_tiling = I915_TILING_X;
 921       return true;
 922    }
 923
 924    switch (attachment) {
 925    case __DRI_BUFFER_DEPTH:
 926    case __DRI_BUFFER_DEPTH_STENCIL:
 927    case __DRI_BUFFER_HIZ:
 928       *out_tiling = I915_TILING_Y;
 929       return true;
 930    case __DRI_BUFFER_ACCUM:
 931    case __DRI_BUFFER_FRONT_LEFT:
 932    case __DRI_BUFFER_FRONT_RIGHT:
 933    case __DRI_BUFFER_BACK_LEFT:
 934    case __DRI_BUFFER_BACK_RIGHT:
 935    case __DRI_BUFFER_FAKE_FRONT_LEFT:
 936    case __DRI_BUFFER_FAKE_FRONT_RIGHT:
 937       *out_tiling = I915_TILING_X;
 938       return true;
 939    case __DRI_BUFFER_STENCIL:
 940       /* The stencil buffer is W tiled. However, we request from the kernel
 941        * a non-tiled buffer because the GTT is incapable of W fencing.
 942        */
 943       *out_tiling = I915_TILING_NONE;
 944       return true;
 945    default:
 946       if(unlikely(INTEL_DEBUG & DEBUG_DRI)) {
 947          fprintf(stderr, "error: %s: unrecognized DRI buffer attachment 0x%x\n",
 948                  __FUNCTION__, attachment);
 949       }
 950        return false;
 951    }
 952 }
 953
 954 static __DRIbuffer *
 955 intelAllocateBuffer(__DRIscreen *screen,
 956                     unsigned attachment, unsigned format,
 957                     int width, int height)
 958 {
 959    struct intel_buffer *intelBuffer;
 960    struct intel_screen *intelScreen = screen->driverPrivate;
 961
 962    uint32_t tiling;
 963    uint32_t region_width;
 964    uint32_t region_height;
 965    uint32_t region_cpp;
 966
 967    bool ok = true;
 968
 969    ok = intel_get_dri_buffer_tiling(intelScreen, attachment, &tiling);
 970    if (!ok)
 971       return NULL;
 972
 973    intelBuffer = CALLOC(sizeof *intelBuffer);
 974    if (intelBuffer == NULL)
 975       return NULL;
 976
 977    if (attachment == __DRI_BUFFER_STENCIL) {
 978       /* Stencil buffers use W tiling, a tiling format that the DRM functions
 979        * don't properly account for.  Therefore, when we allocate a stencil
 980        * buffer that is private to Mesa (see intel_miptree_create), we round
 981        * the height and width up to the next multiple of the tile size (64x64)
 982        * and then ask DRM to allocate an untiled buffer.  Consequently, the
 983        * height and the width stored in the stencil buffer's region structure
 984        * are always multiples of 64, even if the stencil buffer itself is
 985        * smaller.
 986        *
 987        * To avoid inconsistencies between how we represent private buffers and
 988        * buffers shared with the window system, round up the height and width
 989        * for window system buffers too.
 990        */
 991       region_width = ALIGN(width, 64);
 992       region_height = ALIGN(height, 64);
 993    } else {
 994       region_width = width;
 995       region_height = height;
 996    }
 997
 998    region_cpp = format / 8;
 999
1000    intelBuffer->region = intel_region_alloc(intelScreen,
1001                                             tiling,
1002                                             region_cpp,
1003                                             region_width,
1004                                             region_height,
1005                                             true);
1006
1007    if (intelBuffer->region == NULL) {
1008            FREE(intelBuffer);
1009            return NULL;
1010    }
1011
1012    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
1013
1014    intelBuffer->base.attachment = attachment;
1015    intelBuffer->base.cpp = intelBuffer->region->cpp;
1016    intelBuffer->base.pitch =
1017          intelBuffer->region->pitch * intelBuffer->region->cpp;
1018
1019    return &intelBuffer->base;
1020 }
1021
1022 static void
1023 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
1024 {
1025    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
1026
1027    intel_region_release(&intelBuffer->region);
1028    free(intelBuffer);
1029 }
1030
1031
1032 const struct __DriverAPIRec driDriverAPI = {
1033    .InitScreen           = intelInitScreen2,
1034    .DestroyScreen        = intelDestroyScreen,
1035    .CreateContext        = intelCreateContext,
1036    .DestroyContext       = intelDestroyContext,
1037    .CreateBuffer         = intelCreateBuffer,
1038    .DestroyBuffer        = intelDestroyBuffer,
1039    .MakeCurrent          = intelMakeCurrent,
1040    .UnbindContext        = intelUnbindContext,
1041    .AllocateBuffer       = intelAllocateBuffer,
1042    .ReleaseBuffer        = intelReleaseBuffer
1043 };
1044
1045 /* This is the table of extensions that the loader will dlsym() for. */
1046 PUBLIC const __DRIextension *__driDriverExtensions[] = {
1047     &driCoreExtension.base,
1048     &driDRI2Extension.base,
1049     NULL
1050 };