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 #include "i830_common.h"
  53
  54 #include "intel_tex.h"
  55 #include "intel_span.h"
  56 #include "intel_ioctl.h"
  57 #include "intel_batchbuffer.h"
  58 #include "intel_blit.h"
  59 #include "intel_regions.h"
  60 #include "intel_buffers.h"
  61 #include "intel_buffer_objects.h"
  62 #include "intel_decode.h"
  63 #include "intel_fbo.h"
  64 #include "intel_bufmgr_ttm.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_extension =
 231     { "GL_ARB_occlusion_query",            GL_ARB_occlusion_query_functions};
 232
 233 /**
 234  * Initializes potential list of extensions if ctx == NULL, or actually enables
 235  * extensions for a context.
 236  */
 237 void intelInitExtensions(GLcontext *ctx, GLboolean enable_imaging)
 238 {
 239    struct intel_context *intel = ctx?intel_context(ctx):NULL;
 240
 241    /* Disable imaging extension until convolution is working in teximage paths.
 242     */
 243    enable_imaging = GL_FALSE;
 244
 245    driInitExtensions(ctx, card_extensions, enable_imaging);
 246
 247    if (intel == NULL || intel->ttm)
 248       driInitExtensions(ctx, ttm_extensions, GL_FALSE);
 249
 250    if (intel == NULL || intel->intelScreen->drmMinor >= 8)
 251       driInitSingleExtension(ctx, &arb_oc_extension);
 252 }
 253
 254 static const struct dri_debug_control debug_control[] =
 255 {
 256     { "fall",  DEBUG_FALLBACKS },
 257     { "tex",   DEBUG_TEXTURE },
 258     { "ioctl", DEBUG_IOCTL },
 259     { "prim",  DEBUG_PRIMS },
 260     { "vert",  DEBUG_VERTS },
 261     { "state", DEBUG_STATE },
 262     { "verb",  DEBUG_VERBOSE },
 263     { "dri",   DEBUG_DRI },
 264     { "dma",   DEBUG_DMA },
 265     { "san",   DEBUG_SANITY },
 266     { "sync",  DEBUG_SYNC },
 267     { "sleep", DEBUG_SLEEP },
 268     { "pix",   DEBUG_PIXEL },
 269     { "buf",   DEBUG_BUFMGR },
 270     { "stats", DEBUG_STATS },
 271     { "tile",  DEBUG_TILE },
 272     { "sing",  DEBUG_SINGLE_THREAD },
 273     { "thre",  DEBUG_SINGLE_THREAD },
 274     { "wm",    DEBUG_WM },
 275     { "vs",    DEBUG_VS },
 276     { "bat",   DEBUG_BATCH },
 277     { "blit",  DEBUG_BLIT},
 278     { "mip",   DEBUG_MIPTREE},
 279     { "reg",   DEBUG_REGION},
 280     { "fbo",   DEBUG_FBO },
 281     { NULL,    0 }
 282 };
 283
 284
 285 static void intelInvalidateState( GLcontext *ctx, GLuint new_state )
 286 {
 287    struct intel_context *intel = intel_context(ctx);
 288
 289    _swrast_InvalidateState( ctx, new_state );
 290    _swsetup_InvalidateState( ctx, new_state );
 291    _vbo_InvalidateState( ctx, new_state );
 292    _tnl_InvalidateState( ctx, new_state );
 293    _tnl_invalidate_vertex_state( ctx, new_state );
 294
 295    intel->NewGLState |= new_state;
 296
 297    if (intel->vtbl.invalidate_state)
 298       intel->vtbl.invalidate_state( intel, new_state );
 299 }
 300
 301
 302 void intelFlush( GLcontext *ctx )
 303 {
 304    struct intel_context *intel = intel_context( ctx );
 305
 306    if (intel->batch->map != intel->batch->ptr)
 307       intel_batchbuffer_flush(intel->batch);
 308 }
 309
 310 void intelFinish( GLcontext *ctx )
 311 {
 312    struct intel_context *intel = intel_context( ctx );
 313
 314    intelFlush(ctx);
 315    if (intel->batch->last_fence) {
 316       dri_fence_wait(intel->batch->last_fence);
 317       dri_fence_unreference(intel->batch->last_fence);
 318       intel->batch->last_fence = NULL;
 319    }
 320 }
 321
 322 static void
 323 intelBeginQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
 324 {
 325         struct intel_context *intel = intel_context( ctx );
 326         drmI830MMIO io = {
 327                 .read_write = MMIO_READ,
 328                 .reg = MMIO_REGS_PS_DEPTH_COUNT,
 329                 .data = &q->Result
 330         };
 331         intel->stats_wm++;
 332         intelFinish(&intel->ctx);
 333         drmCommandWrite(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
 334 }
 335
 336 static void
 337 intelEndQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
 338 {
 339         struct intel_context *intel = intel_context( ctx );
 340         GLuint64EXT tmp;
 341         drmI830MMIO io = {
 342                 .read_write = MMIO_READ,
 343                 .reg = MMIO_REGS_PS_DEPTH_COUNT,
 344                 .data = &tmp
 345         };
 346         intelFinish(&intel->ctx);
 347         drmCommandWrite(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
 348         q->Result = tmp - q->Result;
 349         q->Ready = GL_TRUE;
 350         intel->stats_wm--;
 351 }
 352
 353 /** Driver-specific fence emit implementation for the fake memory manager. */
 354 static unsigned int
 355 intel_fence_emit(void *private)
 356 {
 357    struct intel_context *intel = (struct intel_context *)private;
 358    unsigned int fence;
 359
 360    /* XXX: Need to emit a flush, if we haven't already (at least with the
 361     * current batchbuffer implementation, we have).
 362     */
 363
 364    fence = intelEmitIrqLocked(intel);
 365
 366    return fence;
 367 }
 368
 369 /** Driver-specific fence wait implementation for the fake memory manager. */
 370 static int
 371 intel_fence_wait(void *private, unsigned int cookie)
 372 {
 373    struct intel_context *intel = (struct intel_context *)private;
 374
 375    intelWaitIrq(intel, cookie);
 376
 377    return 0;
 378 }
 379
 380 static GLboolean
 381 intel_init_bufmgr(struct intel_context *intel)
 382 {
 383    intelScreenPrivate *intelScreen = intel->intelScreen;
 384    GLboolean ttm_disable = getenv("INTEL_NO_TTM") != NULL;
 385
 386    /* If we've got a new enough DDX that's initializing TTM and giving us
 387     * object handles for the shared buffers, use that.
 388     */
 389    intel->ttm = GL_FALSE;
 390    if (!ttm_disable &&
 391        intel->intelScreen->driScrnPriv->ddx_version.minor >= 9 &&
 392        intel->intelScreen->drmMinor >= 11 &&
 393        intel->intelScreen->front.bo_handle != -1)
 394    {
 395       intel->bufmgr = intel_bufmgr_ttm_init(intel->driFd,
 396                                             DRM_FENCE_TYPE_EXE,
 397                                             DRM_FENCE_TYPE_EXE |
 398                                             DRM_I915_FENCE_TYPE_RW,
 399                                             BATCH_SZ);
 400       if (intel->bufmgr != NULL)
 401          intel->ttm = GL_TRUE;
 402    }
 403    /* Otherwise, use the classic buffer manager. */
 404    if (intel->bufmgr == NULL) {
 405       if (ttm_disable) {
 406          fprintf(stderr, "TTM buffer manager disabled.  Using classic.\n");
 407       } else {
 408          fprintf(stderr, "Failed to initialize TTM buffer manager.  "
 409                  "Falling back to classic.\n");
 410       }
 411
 412       if (intelScreen->tex.size == 0) {
 413          fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 414                  __func__, __LINE__);
 415          return GL_FALSE;
 416       }
 417
 418       intel->bufmgr = dri_bufmgr_fake_init(intelScreen->tex.offset,
 419                                            intelScreen->tex.map,
 420                                            intelScreen->tex.size,
 421                                            intel_fence_emit,
 422                                            intel_fence_wait,
 423                                            intel);
 424    }
 425
 426    return GL_TRUE;
 427 }
 428
 429
 430 void intelInitDriverFunctions( struct dd_function_table *functions )
 431 {
 432    _mesa_init_driver_functions( functions );
 433
 434    functions->Flush = intelFlush;
 435    functions->Finish = intelFinish;
 436    functions->GetString = intelGetString;
 437    functions->UpdateState = intelInvalidateState;
 438    functions->BeginQuery = intelBeginQuery;
 439    functions->EndQuery = intelEndQuery;
 440
 441    /* CopyPixels can be accelerated even with the current memory
 442     * manager:
 443     */
 444    if (!getenv("INTEL_NO_BLIT")) {
 445       functions->CopyPixels = intelCopyPixels;
 446       functions->Bitmap = intelBitmap;
 447    }
 448
 449    intelInitTextureFuncs( functions );
 450    intelInitStateFuncs( functions );
 451    intelInitBufferFuncs( functions );
 452 }
 453
 454 GLboolean intelInitContext( struct intel_context *intel,
 455                             const __GLcontextModes *mesaVis,
 456                             __DRIcontextPrivate *driContextPriv,
 457                             void *sharedContextPrivate,
 458                             struct dd_function_table *functions )
 459 {
 460    GLcontext *ctx = &intel->ctx;
 461    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 462    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 463    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 464    volatile drmI830Sarea *saPriv = (drmI830Sarea *)
 465      (((GLubyte *)sPriv->pSAREA)+intelScreen->sarea_priv_offset);
 466
 467    if (!_mesa_initialize_context(&intel->ctx,
 468                                  mesaVis, shareCtx,
 469                                  functions,
 470                                  (void*) intel)) {
 471       _mesa_printf("%s: failed to init mesa context\n", __FUNCTION__);
 472       return GL_FALSE;
 473    }
 474
 475    driContextPriv->driverPrivate = intel;
 476    intel->intelScreen = intelScreen;
 477    intel->driScreen = sPriv;
 478    intel->sarea = saPriv;
 479
 480    /* Dri stuff */
 481    intel->hHWContext = driContextPriv->hHWContext;
 482    intel->driFd = sPriv->fd;
 483    intel->driHwLock = (drmLock *) &sPriv->pSAREA->lock;
 484
 485    intel->maxBatchSize = BATCH_SZ;
 486
 487    if (!intel_init_bufmgr(intel))
 488       return GL_FALSE;
 489
 490    driParseConfigFiles (&intel->optionCache, &intelScreen->optionCache,
 491                    intel->driScreen->myNum, "i965");
 492
 493    ctx->Const.MaxTextureMaxAnisotropy = 2.0;
 494
 495    if (getenv("INTEL_STRICT_CONFORMANCE")) {
 496       intel->strict_conformance = 1;
 497    }
 498
 499    if (intel->strict_conformance) {
 500       ctx->Const.MinLineWidth = 1.0;
 501       ctx->Const.MinLineWidthAA = 1.0;
 502       ctx->Const.MaxLineWidth = 1.0;
 503       ctx->Const.MaxLineWidthAA = 1.0;
 504       ctx->Const.LineWidthGranularity = 1.0;
 505    }
 506    else {
 507       ctx->Const.MinLineWidth = 1.0;
 508       ctx->Const.MinLineWidthAA = 1.0;
 509       ctx->Const.MaxLineWidth = 5.0;
 510       ctx->Const.MaxLineWidthAA = 5.0;
 511       ctx->Const.LineWidthGranularity = 0.5;
 512    }
 513
 514    ctx->Const.MinPointSize = 1.0;
 515    ctx->Const.MinPointSizeAA = 1.0;
 516    ctx->Const.MaxPointSize = 255.0;
 517    ctx->Const.MaxPointSizeAA = 3.0;
 518    ctx->Const.PointSizeGranularity = 1.0;
 519
 520    /* reinitialize the context point state.
 521     * It depend on constants in __GLcontextRec::Const
 522     */
 523    _mesa_init_point(ctx);
 524
 525    /* Initialize the software rasterizer and helper modules. */
 526    _swrast_CreateContext( ctx );
 527    _vbo_CreateContext( ctx );
 528    _tnl_CreateContext( ctx );
 529    _swsetup_CreateContext( ctx );
 530
 531    TNL_CONTEXT(ctx)->Driver.RunPipeline = _tnl_run_pipeline;
 532
 533    /* Configure swrast to match hardware characteristics: */
 534    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 535    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 536
 537    intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 538    intel->hw_stipple = 1;
 539
 540    switch(mesaVis->depthBits) {
 541    case 0:                      /* what to do in this case? */
 542    case 16:
 543       intel->polygon_offset_scale = 1.0/0xffff;
 544       break;
 545    case 24:
 546       intel->polygon_offset_scale = 2.0/0xffffff; /* req'd to pass glean */
 547       break;
 548    default:
 549       assert(0);
 550       break;
 551    }
 552
 553    /* Initialize swrast, tnl driver tables: */
 554    intelInitSpanFuncs( ctx );
 555
 556    if (!intel->intelScreen->irq_active) {
 557       _mesa_printf("IRQs not active.  Exiting\n");
 558       exit(1);
 559    }
 560    intelInitExtensions(ctx, GL_TRUE);
 561
 562    INTEL_DEBUG  = driParseDebugString( getenv( "INTEL_DEBUG" ),
 563                                        debug_control );
 564    if (INTEL_DEBUG & DEBUG_BUFMGR)
 565       dri_bufmgr_set_debug(intel->bufmgr, GL_TRUE);
 566
 567    intel_recreate_static_regions(intel);
 568
 569    intel_bufferobj_init( intel );
 570    intel_fbo_init( intel );
 571
 572    intel->batch = intel_batchbuffer_alloc( intel );
 573    intel->last_swap_fence = NULL;
 574    intel->first_swap_fence = NULL;
 575
 576    if (intel->ctx.Mesa_DXTn) {
 577       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 578       _mesa_enable_extension( ctx, "GL_S3_s3tc" );
 579    }
 580    else if (driQueryOptionb (&intel->optionCache, "force_s3tc_enable")) {
 581       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 582    }
 583
 584 /*    driInitTextureObjects( ctx, & intel->swapped, */
 585 /*                        DRI_TEXMGR_DO_TEXTURE_1D | */
 586 /*                        DRI_TEXMGR_DO_TEXTURE_2D |  */
 587 /*                        DRI_TEXMGR_DO_TEXTURE_RECT ); */
 588
 589    /* Force all software fallbacks */
 590    if (driQueryOptionb(&intel->optionCache, "no_rast")) {
 591       fprintf(stderr, "disabling 3D rasterization\n");
 592       intel->no_rast = 1;
 593    }
 594
 595    /* Disable all hardware rendering (skip emitting batches and fences/waits
 596     * to the kernel)
 597     */
 598    intel->no_hw = getenv("INTEL_NO_HW") != NULL;
 599
 600    return GL_TRUE;
 601 }
 602
 603 void intelDestroyContext(__DRIcontextPrivate *driContextPriv)
 604 {
 605    struct intel_context *intel = (struct intel_context *) driContextPriv->driverPrivate;
 606
 607    assert(intel); /* should never be null */
 608    if (intel) {
 609       GLboolean   release_texture_heaps;
 610
 611
 612       intel->vtbl.destroy( intel );
 613
 614       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 615       _swsetup_DestroyContext (&intel->ctx);
 616       _tnl_DestroyContext (&intel->ctx);
 617       _vbo_DestroyContext (&intel->ctx);
 618
 619       _swrast_DestroyContext (&intel->ctx);
 620       intel->Fallback = 0;      /* don't call _swrast_Flush later */
 621       intel_batchbuffer_free(intel->batch);
 622       intel->batch = NULL;
 623
 624       if (intel->last_swap_fence) {
 625          dri_fence_wait(intel->last_swap_fence);
 626          dri_fence_unreference(intel->last_swap_fence);
 627          intel->last_swap_fence = NULL;
 628       }
 629       if (intel->first_swap_fence) {
 630          dri_fence_wait(intel->first_swap_fence);
 631          dri_fence_unreference(intel->first_swap_fence);
 632          intel->first_swap_fence = NULL;
 633       }
 634
 635       if ( release_texture_heaps ) {
 636          /* This share group is about to go away, free our private
 637           * texture object data.
 638           */
 639
 640          /* XXX: destroy the shared bufmgr struct here?
 641           */
 642       }
 643
 644       /* free the Mesa context */
 645       intel->ctx.VertexProgram.Current = NULL;
 646       intel->ctx.FragmentProgram.Current = NULL;
 647       _mesa_destroy_context(&intel->ctx);
 648    }
 649
 650    driContextPriv->driverPrivate = NULL;
 651 }
 652
 653 GLboolean intelUnbindContext(__DRIcontextPrivate *driContextPriv)
 654 {
 655    return GL_TRUE;
 656 }
 657
 658 GLboolean intelMakeCurrent(__DRIcontextPrivate *driContextPriv,
 659                           __DRIdrawablePrivate *driDrawPriv,
 660                           __DRIdrawablePrivate *driReadPriv)
 661 {
 662
 663    if (driContextPriv) {
 664       struct intel_context *intel =
 665          (struct intel_context *) driContextPriv->driverPrivate;
 666       struct intel_framebuffer *intel_fb =
 667          (struct intel_framebuffer *) driDrawPriv->driverPrivate;
 668       GLframebuffer *readFb = (GLframebuffer *) driReadPriv->driverPrivate;
 669
 670       /* XXX FBO temporary fix-ups! */
 671       /* if the renderbuffers don't have regions, init them from the context.
 672        * They will be unreferenced when the renderbuffer is destroyed.
 673        */
 674       {
 675          struct intel_renderbuffer *irbDepth
 676              = intel_get_renderbuffer(&intel_fb->Base, BUFFER_DEPTH);
 677          struct intel_renderbuffer *irbStencil
 678              = intel_get_renderbuffer(&intel_fb->Base, BUFFER_STENCIL);
 679
 680          if (intel_fb->color_rb[0]) {
 681              intel_renderbuffer_set_region(intel_fb->color_rb[0],
 682                                            intel->front_region);
 683          }
 684          if (intel_fb->color_rb[1]) {
 685              intel_renderbuffer_set_region(intel_fb->color_rb[1],
 686                                            intel->back_region);
 687          }
 688          if (intel_fb->color_rb[2]) {
 689              intel_renderbuffer_set_region(intel_fb->color_rb[2],
 690                                            intel->third_region);
 691          }
 692          if (irbDepth) {
 693              intel_renderbuffer_set_region(irbDepth, intel->depth_region);
 694          }
 695          if (irbStencil) {
 696              intel_renderbuffer_set_region(irbStencil, intel->depth_region);
 697          }
 698       }
 699
 700       /* set GLframebuffer size to match window, if needed */
 701       driUpdateFramebufferSize(&intel->ctx, driDrawPriv);
 702
 703       if (intel->driReadDrawable != driReadPriv) {
 704           intel->driReadDrawable = driReadPriv;
 705       }
 706
 707       if ( intel->driDrawable != driDrawPriv ) {
 708          if (driDrawPriv->swap_interval == (unsigned)-1) {
 709             driDrawPriv->vblFlags = (intel->intelScreen->irq_active != 0)
 710                ? driGetDefaultVBlankFlags(&intel->optionCache)
 711                : VBLANK_FLAG_NO_IRQ;
 712             driDrawableInitVBlank( driDrawPriv );
 713          }
 714
 715          intel->driDrawable = driDrawPriv;
 716          intelWindowMoved( intel );
 717          /* Shouldn't the readbuffer be stored also? */
 718       }
 719
 720       _mesa_make_current(&intel->ctx,
 721                          &intel_fb->Base,
 722                          readFb);
 723
 724       intel_draw_buffer(&intel->ctx, &intel_fb->Base);
 725    } else {
 726       _mesa_make_current(NULL, NULL, NULL);
 727    }
 728
 729    return GL_TRUE;
 730 }
 731
 732
 733 static void intelContendedLock( struct intel_context *intel, GLuint flags )
 734 {
 735    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 736    __DRIscreenPrivate *sPriv = intel->driScreen;
 737    volatile drmI830Sarea * sarea = intel->sarea;
 738    int me = intel->hHWContext;
 739
 740    drmGetLock(intel->driFd, intel->hHWContext, flags);
 741
 742    /* If the window moved, may need to set a new cliprect now.
 743     *
 744     * NOTE: This releases and regains the hw lock, so all state
 745     * checking must be done *after* this call:
 746     */
 747    if (dPriv)
 748       DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 749
 750
 751    intel->locked = 1;
 752
 753    /* Lost context?
 754     */
 755    if (sarea->ctxOwner != me) {
 756       if (INTEL_DEBUG & DEBUG_BUFMGR) {
 757          fprintf(stderr, "Lost Context: sarea->ctxOwner %x me %x\n",
 758                  sarea->ctxOwner, me);
 759       }
 760       sarea->ctxOwner = me;
 761    }
 762
 763    /* If the last consumer of the texture memory wasn't us, notify the fake
 764     * bufmgr and record the new owner.  We should have the memory shared
 765     * between contexts of a single fake bufmgr, but this will at least make
 766     * things correct for now.
 767     */
 768    if (!intel->ttm && sarea->texAge != intel->hHWContext) {
 769       sarea->texAge = intel->hHWContext;
 770       dri_bufmgr_fake_contended_lock_take(intel->bufmgr);
 771       if (INTEL_DEBUG & DEBUG_BATCH)
 772          intel_decode_context_reset();
 773       if (INTEL_DEBUG & DEBUG_BUFMGR) {
 774          fprintf(stderr, "Lost Textures: sarea->texAge %x hw context %x\n",
 775                  sarea->ctxOwner, intel->hHWContext);
 776       }
 777    }
 778
 779    /* Drawable changed?
 780     */
 781    if (dPriv && intel->lastStamp != dPriv->lastStamp) {
 782       intelWindowMoved( intel );
 783       intel->lastStamp = dPriv->lastStamp;
 784    }
 785 }
 786
 787 _glthread_DECLARE_STATIC_MUTEX(lockMutex);
 788
 789 /* Lock the hardware and validate our state.
 790  */
 791 void LOCK_HARDWARE( struct intel_context *intel )
 792 {
 793     char __ret=0;
 794
 795     _glthread_LOCK_MUTEX(lockMutex);
 796     assert(!intel->locked);
 797
 798
 799     DRM_CAS(intel->driHwLock, intel->hHWContext,
 800             (DRM_LOCK_HELD|intel->hHWContext), __ret);
 801     if (__ret)
 802         intelContendedLock( intel, 0 );
 803
 804    intel->locked = 1;
 805
 806 }
 807
 808
 809 /* Unlock the hardware using the global current context
 810  */
 811 void UNLOCK_HARDWARE( struct intel_context *intel )
 812 {
 813    intel->vtbl.note_unlock( intel );
 814    intel->locked = 0;
 815
 816    DRM_UNLOCK(intel->driFd, intel->driHwLock, intel->hHWContext);
 817    _glthread_UNLOCK_MUTEX(lockMutex);
 818
 819    /**
 820     * Nothing should be left in batch outside of LOCK/UNLOCK which references
 821     * cliprects.
 822     */
 823    assert(intel->batch->cliprect_mode != REFERENCES_CLIPRECTS);
 824 }
 825
 826