src/mesa/drivers/dri/i965/intel_context.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
  29 #include "glheader.h"
  30 #include "context.h"
  31 #include "matrix.h"
  32 #include "simple_list.h"
  33 #include "extensions.h"
  34 #include "framebuffer.h"
  35 #include "imports.h"
  36 #include "points.h"
  37
  38 #include "swrast/swrast.h"
  39 #include "swrast_setup/swrast_setup.h"
  40 #include "tnl/tnl.h"
  41 #include "vbo/vbo.h"
  42
  43 #include "tnl/t_pipeline.h"
  44 #include "tnl/t_vertex.h"
  45
  46 #include "drivers/common/driverfuncs.h"
  47
  48 #include "intel_screen.h"
  49 #include "intel_chipset.h"
  50
  51 #include "i830_dri.h"
  52
  53 #include "intel_tex.h"
  54 #include "intel_span.h"
  55 #include "intel_ioctl.h"
  56 #include "intel_batchbuffer.h"
  57 #include "intel_blit.h"
  58 #include "intel_regions.h"
  59 #include "intel_buffers.h"
  60 #include "intel_buffer_objects.h"
  61 #include "intel_decode.h"
  62 #include "intel_fbo.h"
  63 #include "intel_bufmgr_ttm.h"
  64 #include "intel_pixel.h"
  65
  66 #include "drirenderbuffer.h"
  67 #include "i915_drm.h"
  68
  69 #include "utils.h"
  70 #include "vblank.h"
  71 #ifndef INTEL_DEBUG
  72 int INTEL_DEBUG = (0);
  73 #endif
  74
  75 #define need_GL_NV_point_sprite
  76 #define need_GL_ARB_multisample
  77 #define need_GL_ARB_point_parameters
  78 #define need_GL_ARB_texture_compression
  79 #define need_GL_ARB_vertex_buffer_object
  80 #define need_GL_ARB_vertex_program
  81 #define need_GL_ARB_window_pos
  82 #define need_GL_ARB_occlusion_query
  83 #define need_GL_EXT_blend_color
  84 #define need_GL_EXT_blend_equation_separate
  85 #define need_GL_EXT_blend_func_separate
  86 #define need_GL_EXT_blend_minmax
  87 #define need_GL_EXT_cull_vertex
  88 #define need_GL_EXT_fog_coord
  89 #define need_GL_EXT_framebuffer_object
  90 #define need_GL_EXT_multi_draw_arrays
  91 #define need_GL_EXT_secondary_color
  92 #define need_GL_ATI_separate_stencil
  93 #define need_GL_EXT_point_parameters
  94 #define need_GL_VERSION_2_0
  95 #define need_GL_VERSION_2_1
  96 #define need_GL_ARB_shader_objects
  97 #define need_GL_ARB_vertex_shader
  98
  99 #include "extension_helper.h"
 100
 101 #ifndef VERBOSE
 102 int VERBOSE = 0;
 103 #endif
 104
 105 /***************************************
 106  * Mesa's Driver Functions
 107  ***************************************/
 108
 109 #define DRIVER_VERSION                     "4.1.3002"
 110
 111 static const GLubyte *intelGetString( GLcontext *ctx, GLenum name )
 112 {
 113    const char * chipset;
 114    static char buffer[128];
 115
 116    switch (name) {
 117    case GL_VENDOR:
 118       return (GLubyte *)"Tungsten Graphics, Inc";
 119       break;
 120
 121    case GL_RENDERER:
 122       switch (intel_context(ctx)->intelScreen->deviceID) {
 123       case PCI_CHIP_I965_Q:
 124          chipset = "Intel(R) 965Q";
 125          break;
 126       case PCI_CHIP_I965_G:
 127       case PCI_CHIP_I965_G_1:
 128          chipset = "Intel(R) 965G";
 129          break;
 130       case PCI_CHIP_I946_GZ:
 131          chipset = "Intel(R) 946GZ";
 132          break;
 133       case PCI_CHIP_I965_GM:
 134          chipset = "Intel(R) 965GM";
 135          break;
 136       case PCI_CHIP_I965_GME:
 137          chipset = "Intel(R) 965GME/GLE";
 138          break;
 139       case PCI_CHIP_IGD_GM:
 140          chipset = "Intel(R) Integrated Graphics Device";
 141          break;
 142       default:
 143          chipset = "Unknown Intel Chipset";
 144       }
 145
 146       (void) driGetRendererString( buffer, chipset, DRIVER_VERSION, 0 );
 147       return (GLubyte *) buffer;
 148
 149    default:
 150       return NULL;
 151    }
 152 }
 153
 154
 155 /**
 156  * Extension strings exported by the intel driver.
 157  *
 158  * \note
 159  * It appears that ARB_texture_env_crossbar has "disappeared" compared to the
 160  * old i830-specific driver.
 161  */
 162 const struct dri_extension card_extensions[] =
 163 {
 164     { "GL_ARB_multisample",                GL_ARB_multisample_functions },
 165     { "GL_ARB_multitexture",               NULL },
 166     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 167     { "GL_NV_point_sprite",                GL_NV_point_sprite_functions },
 168     { "GL_ARB_texture_border_clamp",       NULL },
 169     { "GL_ARB_texture_compression",        GL_ARB_texture_compression_functions },
 170     { "GL_ARB_texture_cube_map",           NULL },
 171     { "GL_ARB_texture_env_add",            NULL },
 172     { "GL_ARB_texture_env_combine",        NULL },
 173     { "GL_ARB_texture_env_dot3",           NULL },
 174     { "GL_ARB_texture_mirrored_repeat",    NULL },
 175     { "GL_ARB_texture_non_power_of_two",   NULL },
 176     { "GL_ARB_texture_rectangle",          NULL },
 177     { "GL_NV_texture_rectangle",           NULL },
 178     { "GL_EXT_texture_rectangle",          NULL },
 179     { "GL_ARB_texture_rectangle",          NULL },
 180     { "GL_ARB_point_sprite",               NULL},
 181     { "GL_ARB_point_parameters",           NULL },
 182     { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
 183     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions },
 184     { "GL_ARB_window_pos",                 GL_ARB_window_pos_functions },
 185     { "GL_EXT_blend_color",                GL_EXT_blend_color_functions },
 186     { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
 187     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
 188     { "GL_EXT_blend_minmax",               GL_EXT_blend_minmax_functions },
 189     { "GL_EXT_blend_logic_op",             NULL },
 190     { "GL_EXT_blend_subtract",             NULL },
 191     { "GL_EXT_cull_vertex",                GL_EXT_cull_vertex_functions },
 192     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
 193     { "GL_EXT_multi_draw_arrays",          GL_EXT_multi_draw_arrays_functions },
 194     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 195     { "GL_ATI_separate_stencil",           GL_ATI_separate_stencil_functions },
 196     { "GL_EXT_stencil_wrap",               NULL },
 197     /* Do not enable this extension.  It conflicts with GL_ATI_separate_stencil
 198      * and 2.0's separate stencil, because mesa's computed _TestTwoSide will
 199      * only reflect whether it's enabled through this extension, even if the
 200      * application is using the other interfaces.
 201      */
 202 /*{ "GL_EXT_stencil_two_side",           GL_EXT_stencil_two_side_functions },*/
 203     { "GL_EXT_texture_edge_clamp",         NULL },
 204     { "GL_EXT_texture_env_combine",        NULL },
 205     { "GL_EXT_texture_env_dot3",           NULL },
 206     { "GL_EXT_texture_filter_anisotropic", NULL },
 207     { "GL_EXT_texture_lod_bias",           NULL },
 208     { "GL_EXT_texture_sRGB",               NULL },
 209     { "GL_3DFX_texture_compression_FXT1",  NULL },
 210     { "GL_APPLE_client_storage",           NULL },
 211     { "GL_MESA_pack_invert",               NULL },
 212     { "GL_MESA_ycbcr_texture",             NULL },
 213     { "GL_NV_blend_square",                NULL },
 214     { "GL_SGIS_generate_mipmap",           NULL },
 215     { "GL_ARB_shading_language_100",       GL_VERSION_2_0_functions},
 216     { "GL_ARB_shading_language_120",       GL_VERSION_2_1_functions},
 217     { "GL_ARB_shader_objects",             GL_ARB_shader_objects_functions},
 218     { "GL_ARB_vertex_shader",              GL_ARB_vertex_shader_functions},
 219     { "GL_ARB_fragment_shader",            NULL },
 220     { "GL_ARB_draw_buffers",               NULL },
 221     { NULL,                                NULL }
 222 };
 223
 224 const struct dri_extension ttm_extensions[] = {
 225    {"GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions},
 226    {"GL_ARB_pixel_buffer_object", NULL},
 227    {NULL, NULL}
 228 };
 229
 230 const struct dri_extension arb_oc_extensions[] = {
 231    {"GL_ARB_occlusion_query",            GL_ARB_occlusion_query_functions},
 232    {NULL, NULL}
 233 };
 234
 235 /**
 236  * Initializes potential list of extensions if ctx == NULL, or actually enables
 237  * extensions for a context.
 238  */
 239 static void intelInitExtensions(GLcontext *ctx, GLboolean enable_imaging)
 240 {
 241    struct intel_context *intel = ctx?intel_context(ctx):NULL;
 242
 243    /* Disable imaging extension until convolution is working in teximage paths.
 244     */
 245    enable_imaging = GL_FALSE;
 246
 247    driInitExtensions(ctx, card_extensions, enable_imaging);
 248
 249    if (intel == NULL || intel->ttm)
 250       driInitExtensions(ctx, ttm_extensions, GL_FALSE);
 251
 252    if (intel == NULL || intel->intelScreen->drmMinor >= 8)
 253       driInitExtensions(ctx, arb_oc_extensions, GL_FALSE);
 254 }
 255
 256 static const struct dri_debug_control debug_control[] =
 257 {
 258     { "fall",  DEBUG_FALLBACKS },
 259     { "tex",   DEBUG_TEXTURE },
 260     { "ioctl", DEBUG_IOCTL },
 261     { "prim",  DEBUG_PRIMS },
 262     { "vert",  DEBUG_VERTS },
 263     { "state", DEBUG_STATE },
 264     { "verb",  DEBUG_VERBOSE },
 265     { "dri",   DEBUG_DRI },
 266     { "dma",   DEBUG_DMA },
 267     { "san",   DEBUG_SANITY },
 268     { "sync",  DEBUG_SYNC },
 269     { "sleep", DEBUG_SLEEP },
 270     { "pix",   DEBUG_PIXEL },
 271     { "buf",   DEBUG_BUFMGR },
 272     { "stats", DEBUG_STATS },
 273     { "tile",  DEBUG_TILE },
 274     { "sing",  DEBUG_SINGLE_THREAD },
 275     { "thre",  DEBUG_SINGLE_THREAD },
 276     { "wm",    DEBUG_WM },
 277     { "vs",    DEBUG_VS },
 278     { "bat",   DEBUG_BATCH },
 279     { "blit",  DEBUG_BLIT},
 280     { "mip",   DEBUG_MIPTREE},
 281     { "reg",   DEBUG_REGION},
 282     { "fbo",   DEBUG_FBO },
 283     { NULL,    0 }
 284 };
 285
 286
 287 static void intelInvalidateState( GLcontext *ctx, GLuint new_state )
 288 {
 289    struct intel_context *intel = intel_context(ctx);
 290
 291    _swrast_InvalidateState( ctx, new_state );
 292    _swsetup_InvalidateState( ctx, new_state );
 293    _vbo_InvalidateState( ctx, new_state );
 294    _tnl_InvalidateState( ctx, new_state );
 295    _tnl_invalidate_vertex_state( ctx, new_state );
 296
 297    intel->NewGLState |= new_state;
 298
 299    if (intel->vtbl.invalidate_state)
 300       intel->vtbl.invalidate_state( intel, new_state );
 301 }
 302
 303
 304 void intelFlush( GLcontext *ctx )
 305 {
 306    struct intel_context *intel = intel_context( ctx );
 307
 308    if (intel->batch->map != intel->batch->ptr)
 309       intel_batchbuffer_flush(intel->batch);
 310 }
 311
 312 void intelFinish( GLcontext *ctx )
 313 {
 314    struct intel_context *intel = intel_context( ctx );
 315
 316    intelFlush(ctx);
 317    if (intel->batch->last_fence) {
 318       dri_fence_wait(intel->batch->last_fence);
 319       dri_fence_unreference(intel->batch->last_fence);
 320       intel->batch->last_fence = NULL;
 321    }
 322 }
 323
 324 static void
 325 intelBeginQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
 326 {
 327         struct intel_context *intel = intel_context( ctx );
 328         struct drm_i915_mmio io = {
 329                 .read_write = I915_MMIO_READ,
 330                 .reg = MMIO_REGS_PS_DEPTH_COUNT,
 331                 .data = &q->Result
 332         };
 333         intel->stats_wm++;
 334         intelFinish(&intel->ctx);
 335         drmCommandWrite(intel->driFd, DRM_I915_MMIO, &io, sizeof(io));
 336 }
 337
 338 static void
 339 intelEndQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
 340 {
 341         struct intel_context *intel = intel_context( ctx );
 342         GLuint64EXT tmp;
 343         struct drm_i915_mmio io = {
 344                 .read_write = I915_MMIO_READ,
 345                 .reg = MMIO_REGS_PS_DEPTH_COUNT,
 346                 .data = &tmp
 347         };
 348         intelFinish(&intel->ctx);
 349         drmCommandWrite(intel->driFd, DRM_I915_MMIO, &io, sizeof(io));
 350         q->Result = tmp - q->Result;
 351         q->Ready = GL_TRUE;
 352         intel->stats_wm--;
 353 }
 354
 355 /** Driver-specific fence emit implementation for the fake memory manager. */
 356 static unsigned int
 357 intel_fence_emit(void *private)
 358 {
 359    struct intel_context *intel = (struct intel_context *)private;
 360    unsigned int fence;
 361
 362    /* XXX: Need to emit a flush, if we haven't already (at least with the
 363     * current batchbuffer implementation, we have).
 364     */
 365
 366    fence = intelEmitIrqLocked(intel);
 367
 368    return fence;
 369 }
 370
 371 /** Driver-specific fence wait implementation for the fake memory manager. */
 372 static int
 373 intel_fence_wait(void *private, unsigned int cookie)
 374 {
 375    struct intel_context *intel = (struct intel_context *)private;
 376
 377    intelWaitIrq(intel, cookie);
 378
 379    return 0;
 380 }
 381
 382 static GLboolean
 383 intel_init_bufmgr(struct intel_context *intel)
 384 {
 385    intelScreenPrivate *intelScreen = intel->intelScreen;
 386    GLboolean ttm_disable = getenv("INTEL_NO_TTM") != NULL;
 387
 388    /* If we've got a new enough DDX that's initializing TTM and giving us
 389     * object handles for the shared buffers, use that.
 390     */
 391    intel->ttm = GL_FALSE;
 392    if (!ttm_disable &&
 393        intel->intelScreen->driScrnPriv->ddx_version.minor >= 9 &&
 394        intel->intelScreen->drmMinor >= 11 &&
 395        intel->intelScreen->front.bo_handle != -1)
 396    {
 397       intel->bufmgr = intel_bufmgr_ttm_init(intel->driFd,
 398                                             DRM_FENCE_TYPE_EXE,
 399                                             DRM_FENCE_TYPE_EXE |
 400                                             DRM_I915_FENCE_TYPE_RW,
 401                                             BATCH_SZ);
 402       if (intel->bufmgr != NULL)
 403          intel->ttm = GL_TRUE;
 404    }
 405    /* Otherwise, use the classic buffer manager. */
 406    if (intel->bufmgr == NULL) {
 407       if (ttm_disable) {
 408          fprintf(stderr, "TTM buffer manager disabled.  Using classic.\n");
 409       } else {
 410          fprintf(stderr, "Failed to initialize TTM buffer manager.  "
 411                  "Falling back to classic.\n");
 412       }
 413
 414       if (intelScreen->tex.size == 0) {
 415          fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 416                  __func__, __LINE__);
 417          return GL_FALSE;
 418       }
 419
 420       intel->bufmgr = dri_bufmgr_fake_init(intelScreen->tex.offset,
 421                                            intelScreen->tex.map,
 422                                            intelScreen->tex.size,
 423                                            intel_fence_emit,
 424                                            intel_fence_wait,
 425                                            intel);
 426    }
 427
 428    return GL_TRUE;
 429 }
 430
 431
 432 void intelInitDriverFunctions( struct dd_function_table *functions )
 433 {
 434    _mesa_init_driver_functions( functions );
 435
 436    functions->Flush = intelFlush;
 437    functions->Finish = intelFinish;
 438    functions->GetString = intelGetString;
 439    functions->UpdateState = intelInvalidateState;
 440    functions->BeginQuery = intelBeginQuery;
 441    functions->EndQuery = intelEndQuery;
 442
 443    /* CopyPixels can be accelerated even with the current memory
 444     * manager:
 445     */
 446    if (!getenv("INTEL_NO_BLIT")) {
 447       functions->CopyPixels = intelCopyPixels;
 448       functions->Bitmap = intelBitmap;
 449    }
 450
 451    intelInitTextureFuncs( functions );
 452    intelInitStateFuncs( functions );
 453    intelInitBufferFuncs( functions );
 454 }
 455
 456 GLboolean intelInitContext( struct intel_context *intel,
 457                             const __GLcontextModes *mesaVis,
 458                             __DRIcontextPrivate *driContextPriv,
 459                             void *sharedContextPrivate,
 460                             struct dd_function_table *functions )
 461 {
 462    GLcontext *ctx = &intel->ctx;
 463    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 464    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 465    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 466    volatile struct drm_i915_sarea *saPriv = (struct drm_i915_sarea *)
 467      (((GLubyte *)sPriv->pSAREA)+intelScreen->sarea_priv_offset);
 468
 469    if (!_mesa_initialize_context(&intel->ctx,
 470                                  mesaVis, shareCtx,
 471                                  functions,
 472                                  (void*) intel)) {
 473       _mesa_printf("%s: failed to init mesa context\n", __FUNCTION__);
 474       return GL_FALSE;
 475    }
 476
 477    driContextPriv->driverPrivate = intel;
 478    intel->intelScreen = intelScreen;
 479    intel->driScreen = sPriv;
 480    intel->sarea = saPriv;
 481
 482    /* Dri stuff */
 483    intel->hHWContext = driContextPriv->hHWContext;
 484    intel->driFd = sPriv->fd;
 485    intel->driHwLock = (drmLock *) &sPriv->pSAREA->lock;
 486
 487    intel->maxBatchSize = BATCH_SZ;
 488
 489    if (!intel_init_bufmgr(intel))
 490       return GL_FALSE;
 491
 492    driParseConfigFiles (&intel->optionCache, &intelScreen->optionCache,
 493                    intel->driScreen->myNum, "i965");
 494
 495    ctx->Const.MaxTextureMaxAnisotropy = 2.0;
 496
 497    if (getenv("INTEL_STRICT_CONFORMANCE")) {
 498       intel->strict_conformance = 1;
 499    }
 500
 501    if (intel->strict_conformance) {
 502       ctx->Const.MinLineWidth = 1.0;
 503       ctx->Const.MinLineWidthAA = 1.0;
 504       ctx->Const.MaxLineWidth = 1.0;
 505       ctx->Const.MaxLineWidthAA = 1.0;
 506       ctx->Const.LineWidthGranularity = 1.0;
 507    }
 508    else {
 509       ctx->Const.MinLineWidth = 1.0;
 510       ctx->Const.MinLineWidthAA = 1.0;
 511       ctx->Const.MaxLineWidth = 5.0;
 512       ctx->Const.MaxLineWidthAA = 5.0;
 513       ctx->Const.LineWidthGranularity = 0.5;
 514    }
 515
 516    ctx->Const.MinPointSize = 1.0;
 517    ctx->Const.MinPointSizeAA = 1.0;
 518    ctx->Const.MaxPointSize = 255.0;
 519    ctx->Const.MaxPointSizeAA = 3.0;
 520    ctx->Const.PointSizeGranularity = 1.0;
 521
 522    /* reinitialize the context point state.
 523     * It depend on constants in __GLcontextRec::Const
 524     */
 525    _mesa_init_point(ctx);
 526
 527    /* Initialize the software rasterizer and helper modules. */
 528    _swrast_CreateContext( ctx );
 529    _vbo_CreateContext( ctx );
 530    _tnl_CreateContext( ctx );
 531    _swsetup_CreateContext( ctx );
 532
 533    TNL_CONTEXT(ctx)->Driver.RunPipeline = _tnl_run_pipeline;
 534
 535    /* Configure swrast to match hardware characteristics: */
 536    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 537    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 538
 539    intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 540    intel->hw_stipple = 1;
 541
 542    switch(mesaVis->depthBits) {
 543    case 0:                      /* what to do in this case? */
 544    case 16:
 545       intel->polygon_offset_scale = 1.0/0xffff;
 546       break;
 547    case 24:
 548       intel->polygon_offset_scale = 2.0/0xffffff; /* req'd to pass glean */
 549       break;
 550    default:
 551       assert(0);
 552       break;
 553    }
 554
 555    /* Initialize swrast, tnl driver tables: */
 556    intelInitSpanFuncs( ctx );
 557
 558    if (!intel->intelScreen->irq_active) {
 559       _mesa_printf("IRQs not active.  Exiting\n");
 560       exit(1);
 561    }
 562    intelInitExtensions(ctx, GL_TRUE);
 563
 564    INTEL_DEBUG  = driParseDebugString( getenv( "INTEL_DEBUG" ),
 565                                        debug_control );
 566    if (INTEL_DEBUG & DEBUG_BUFMGR)
 567       dri_bufmgr_set_debug(intel->bufmgr, GL_TRUE);
 568
 569    intel_recreate_static_regions(intel);
 570
 571    intel_bufferobj_init( intel );
 572    intel_fbo_init( intel );
 573
 574    intel->batch = intel_batchbuffer_alloc( intel );
 575    intel->last_swap_fence = NULL;
 576    intel->first_swap_fence = NULL;
 577
 578    if (intel->ctx.Mesa_DXTn) {
 579       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 580       _mesa_enable_extension( ctx, "GL_S3_s3tc" );
 581    }
 582    else if (driQueryOptionb (&intel->optionCache, "force_s3tc_enable")) {
 583       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 584    }
 585
 586 /*    driInitTextureObjects( ctx, & intel->swapped, */
 587 /*                        DRI_TEXMGR_DO_TEXTURE_1D | */
 588 /*                        DRI_TEXMGR_DO_TEXTURE_2D |  */
 589 /*                        DRI_TEXMGR_DO_TEXTURE_RECT ); */
 590
 591    /* Force all software fallbacks */
 592    if (driQueryOptionb(&intel->optionCache, "no_rast")) {
 593       fprintf(stderr, "disabling 3D rasterization\n");
 594       intel->no_rast = 1;
 595    }
 596
 597    /* Disable all hardware rendering (skip emitting batches and fences/waits
 598     * to the kernel)
 599     */
 600    intel->no_hw = getenv("INTEL_NO_HW") != NULL;
 601
 602    return GL_TRUE;
 603 }
 604
 605 void intelDestroyContext(__DRIcontextPrivate *driContextPriv)
 606 {
 607    struct intel_context *intel = (struct intel_context *) driContextPriv->driverPrivate;
 608
 609    assert(intel); /* should never be null */
 610    if (intel) {
 611       GLboolean   release_texture_heaps;
 612
 613
 614       intel->vtbl.destroy( intel );
 615
 616       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 617       _swsetup_DestroyContext (&intel->ctx);
 618       _tnl_DestroyContext (&intel->ctx);
 619       _vbo_DestroyContext (&intel->ctx);
 620
 621       _swrast_DestroyContext (&intel->ctx);
 622       intel->Fallback = 0;      /* don't call _swrast_Flush later */
 623       intel_batchbuffer_free(intel->batch);
 624       intel->batch = NULL;
 625
 626       if (intel->last_swap_fence) {
 627          dri_fence_wait(intel->last_swap_fence);
 628          dri_fence_unreference(intel->last_swap_fence);
 629          intel->last_swap_fence = NULL;
 630       }
 631       if (intel->first_swap_fence) {
 632          dri_fence_wait(intel->first_swap_fence);
 633          dri_fence_unreference(intel->first_swap_fence);
 634          intel->first_swap_fence = NULL;
 635       }
 636
 637       if ( release_texture_heaps ) {
 638          /* This share group is about to go away, free our private
 639           * texture object data.
 640           */
 641
 642          /* XXX: destroy the shared bufmgr struct here?
 643           */
 644       }
 645
 646       /* free the Mesa context */
 647       intel->ctx.VertexProgram.Current = NULL;
 648       intel->ctx.FragmentProgram.Current = NULL;
 649       _mesa_destroy_context(&intel->ctx);
 650    }
 651
 652    driContextPriv->driverPrivate = NULL;
 653 }
 654
 655 GLboolean intelUnbindContext(__DRIcontextPrivate *driContextPriv)
 656 {
 657    return GL_TRUE;
 658 }
 659
 660 GLboolean intelMakeCurrent(__DRIcontextPrivate *driContextPriv,
 661                           __DRIdrawablePrivate *driDrawPriv,
 662                           __DRIdrawablePrivate *driReadPriv)
 663 {
 664
 665    if (driContextPriv) {
 666       struct intel_context *intel =
 667          (struct intel_context *) driContextPriv->driverPrivate;
 668       struct intel_framebuffer *intel_fb =
 669          (struct intel_framebuffer *) driDrawPriv->driverPrivate;
 670       GLframebuffer *readFb = (GLframebuffer *) driReadPriv->driverPrivate;
 671
 672       /* XXX FBO temporary fix-ups! */
 673       /* if the renderbuffers don't have regions, init them from the context.
 674        * They will be unreferenced when the renderbuffer is destroyed.
 675        */
 676       {
 677          struct intel_renderbuffer *irbDepth
 678              = intel_get_renderbuffer(&intel_fb->Base, BUFFER_DEPTH);
 679          struct intel_renderbuffer *irbStencil
 680              = intel_get_renderbuffer(&intel_fb->Base, BUFFER_STENCIL);
 681
 682          if (intel_fb->color_rb[0]) {
 683              intel_renderbuffer_set_region(intel_fb->color_rb[0],
 684                                            intel->front_region);
 685          }
 686          if (intel_fb->color_rb[1]) {
 687              intel_renderbuffer_set_region(intel_fb->color_rb[1],
 688                                            intel->back_region);
 689          }
 690
 691 #if 0
 692          if (intel_fb->color_rb[2]) {
 693              intel_renderbuffer_set_region(intel_fb->color_rb[2],
 694                                            intel->third_region);
 695          }
 696 #endif
 697          if (irbDepth) {
 698              intel_renderbuffer_set_region(irbDepth, intel->depth_region);
 699          }
 700          if (irbStencil) {
 701              intel_renderbuffer_set_region(irbStencil, intel->depth_region);
 702          }
 703       }
 704
 705       /* set GLframebuffer size to match window, if needed */
 706       driUpdateFramebufferSize(&intel->ctx, driDrawPriv);
 707
 708       if (intel->driReadDrawable != driReadPriv) {
 709           intel->driReadDrawable = driReadPriv;
 710       }
 711
 712       if ( intel->driDrawable != driDrawPriv ) {
 713          if (driDrawPriv->swap_interval == (unsigned)-1) {
 714             driDrawPriv->vblFlags = (intel->intelScreen->irq_active != 0)
 715                ? driGetDefaultVBlankFlags(&intel->optionCache)
 716                : VBLANK_FLAG_NO_IRQ;
 717             driDrawableInitVBlank( driDrawPriv );
 718          }
 719
 720          intel->driDrawable = driDrawPriv;
 721          intelWindowMoved( intel );
 722          /* Shouldn't the readbuffer be stored also? */
 723       }
 724
 725       _mesa_make_current(&intel->ctx,
 726                          &intel_fb->Base,
 727                          readFb);
 728
 729       intel_draw_buffer(&intel->ctx, &intel_fb->Base);
 730    } else {
 731       _mesa_make_current(NULL, NULL, NULL);
 732    }
 733
 734    return GL_TRUE;
 735 }
 736
 737
 738 static void intelContendedLock( struct intel_context *intel, GLuint flags )
 739 {
 740    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 741    __DRIscreenPrivate *sPriv = intel->driScreen;
 742    volatile struct drm_i915_sarea * sarea = intel->sarea;
 743    int me = intel->hHWContext;
 744
 745    drmGetLock(intel->driFd, intel->hHWContext, flags);
 746
 747    /* If the window moved, may need to set a new cliprect now.
 748     *
 749     * NOTE: This releases and regains the hw lock, so all state
 750     * checking must be done *after* this call:
 751     */
 752    if (dPriv)
 753       DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 754
 755
 756    intel->locked = 1;
 757
 758    /* Lost context?
 759     */
 760    if (sarea->ctxOwner != me) {
 761       if (INTEL_DEBUG & DEBUG_BUFMGR) {
 762          fprintf(stderr, "Lost Context: sarea->ctxOwner %x me %x\n",
 763                  sarea->ctxOwner, me);
 764       }
 765       sarea->ctxOwner = me;
 766    }
 767
 768    /* If the last consumer of the texture memory wasn't us, notify the fake
 769     * bufmgr and record the new owner.  We should have the memory shared
 770     * between contexts of a single fake bufmgr, but this will at least make
 771     * things correct for now.
 772     */
 773    if (!intel->ttm && sarea->texAge != intel->hHWContext) {
 774       sarea->texAge = intel->hHWContext;
 775       dri_bufmgr_fake_contended_lock_take(intel->bufmgr);
 776       if (INTEL_DEBUG & DEBUG_BATCH)
 777          intel_decode_context_reset();
 778       if (INTEL_DEBUG & DEBUG_BUFMGR) {
 779          fprintf(stderr, "Lost Textures: sarea->texAge %x hw context %x\n",
 780                  sarea->ctxOwner, intel->hHWContext);
 781       }
 782    }
 783
 784    /* Drawable changed?
 785     */
 786    if (dPriv && intel->lastStamp != dPriv->lastStamp) {
 787       intelWindowMoved( intel );
 788       intel->lastStamp = dPriv->lastStamp;
 789    }
 790 }
 791
 792 _glthread_DECLARE_STATIC_MUTEX(lockMutex);
 793
 794 /* Lock the hardware and validate our state.
 795  */
 796 void LOCK_HARDWARE( struct intel_context *intel )
 797 {
 798     char __ret=0;
 799
 800     _glthread_LOCK_MUTEX(lockMutex);
 801     assert(!intel->locked);
 802
 803
 804     DRM_CAS(intel->driHwLock, intel->hHWContext,
 805             (DRM_LOCK_HELD|intel->hHWContext), __ret);
 806     if (__ret)
 807         intelContendedLock( intel, 0 );
 808
 809    intel->locked = 1;
 810
 811 }
 812
 813
 814 /* Unlock the hardware using the global current context
 815  */
 816 void UNLOCK_HARDWARE( struct intel_context *intel )
 817 {
 818    intel->vtbl.note_unlock( intel );
 819    intel->locked = 0;
 820
 821    DRM_UNLOCK(intel->driFd, intel->driHwLock, intel->hHWContext);
 822    _glthread_UNLOCK_MUTEX(lockMutex);
 823
 824    /**
 825     * Nothing should be left in batch outside of LOCK/UNLOCK which references
 826     * cliprects.
 827     */
 828    assert(intel->batch->cliprect_mode != REFERENCES_CLIPRECTS);
 829 }
 830
 831