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
  37 #include "swrast/swrast.h"
  38 #include "swrast_setup/swrast_setup.h"
  39 #include "tnl/tnl.h"
  40 #include "array_cache/acache.h"
  41
  42 #include "tnl/t_pipeline.h"
  43 #include "tnl/t_vertex.h"
  44
  45 #include "drivers/common/driverfuncs.h"
  46
  47 #include "intel_screen.h"
  48
  49 #include "i830_dri.h"
  50 #include "i830_common.h"
  51
  52 #include "intel_tex.h"
  53 #include "intel_span.h"
  54 #include "intel_ioctl.h"
  55 #include "intel_batchbuffer.h"
  56 #include "intel_blit.h"
  57 #include "intel_regions.h"
  58 #include "intel_buffer_objects.h"
  59
  60 #include "bufmgr.h"
  61
  62 #include "utils.h"
  63 #ifndef INTEL_DEBUG
  64 int INTEL_DEBUG = (0);
  65 #endif
  66
  67 #define need_GL_ARB_multisample
  68 #define need_GL_ARB_point_parameters
  69 #define need_GL_ARB_texture_compression
  70 #define need_GL_ARB_vertex_buffer_object
  71 #define need_GL_ARB_vertex_program
  72 #define need_GL_ARB_window_pos
  73 #define need_GL_EXT_blend_color
  74 #define need_GL_EXT_blend_equation_separate
  75 #define need_GL_EXT_blend_func_separate
  76 #define need_GL_EXT_blend_minmax
  77 #define need_GL_EXT_cull_vertex
  78 #define need_GL_EXT_fog_coord
  79 #define need_GL_EXT_multi_draw_arrays
  80 #define need_GL_EXT_secondary_color
  81 #include "extension_helper.h"
  82
  83 #ifndef VERBOSE
  84 int VERBOSE = 0;
  85 #endif
  86
  87 #if DEBUG_LOCKING
  88 char *prevLockFile;
  89 int prevLockLine;
  90 #endif
  91
  92 /***************************************
  93  * Mesa's Driver Functions
  94  ***************************************/
  95
  96 #define DRIVER_VERSION                     "4.1.3002"
  97
  98 static const GLubyte *intelGetString( GLcontext *ctx, GLenum name )
  99 {
 100    const char * chipset;
 101    static char buffer[128];
 102
 103    switch (name) {
 104    case GL_VENDOR:
 105       return (GLubyte *)"Tungsten Graphics, Inc";
 106       break;
 107
 108    case GL_RENDERER:
 109       switch (intel_context(ctx)->intelScreen->deviceID) {
 110       case PCI_CHIP_I965_Q:
 111          chipset = "Intel(R) 965Q"; break;
 112          break;
 113       case PCI_CHIP_I965_G:
 114       case PCI_CHIP_I965_G_1:
 115          chipset = "Intel(R) 965G"; break;
 116          break;
 117       case PCI_CHIP_I946_GZ:
 118          chipset = "Intel(R) 946GZ"; break;
 119          break;
 120       default:
 121          chipset = "Unknown Intel Chipset"; break;
 122       }
 123
 124       (void) driGetRendererString( buffer, chipset, DRIVER_VERSION, 0 );
 125       return (GLubyte *) buffer;
 126
 127    default:
 128       return NULL;
 129    }
 130 }
 131
 132
 133 /**
 134  * Extension strings exported by the intel driver.
 135  *
 136  * \note
 137  * It appears that ARB_texture_env_crossbar has "disappeared" compared to the
 138  * old i830-specific driver.
 139  */
 140 const struct dri_extension card_extensions[] =
 141 {
 142     { "GL_ARB_multisample",                GL_ARB_multisample_functions },
 143     { "GL_ARB_multitexture",               NULL },
 144     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 145     { "GL_ARB_texture_border_clamp",       NULL },
 146     { "GL_ARB_texture_compression",        GL_ARB_texture_compression_functions },
 147     { "GL_ARB_texture_cube_map",           NULL },
 148     { "GL_ARB_texture_env_add",            NULL },
 149     { "GL_ARB_texture_env_combine",        NULL },
 150     { "GL_ARB_texture_env_dot3",           NULL },
 151     { "GL_ARB_texture_mirrored_repeat",    NULL },
 152     { "GL_ARB_texture_non_power_of_two",   NULL },
 153     { "GL_ARB_texture_rectangle",          NULL },
 154     { "GL_NV_texture_rectangle",           NULL },
 155     { "GL_EXT_texture_rectangle",          NULL },
 156     { "GL_ARB_texture_rectangle",          NULL },
 157     { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
 158     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions },
 159     { "GL_ARB_window_pos",                 GL_ARB_window_pos_functions },
 160     { "GL_EXT_blend_color",                GL_EXT_blend_color_functions },
 161     { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
 162     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
 163     { "GL_EXT_blend_minmax",               GL_EXT_blend_minmax_functions },
 164     { "GL_EXT_blend_logic_op",             NULL },
 165     { "GL_EXT_blend_subtract",             NULL },
 166     { "GL_EXT_cull_vertex",                GL_EXT_cull_vertex_functions },
 167     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
 168     { "GL_EXT_multi_draw_arrays",          GL_EXT_multi_draw_arrays_functions },
 169     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 170     { "GL_EXT_stencil_wrap",               NULL },
 171     { "GL_EXT_texture_edge_clamp",         NULL },
 172     { "GL_EXT_texture_env_combine",        NULL },
 173     { "GL_EXT_texture_env_dot3",           NULL },
 174     { "GL_EXT_texture_filter_anisotropic", NULL },
 175     { "GL_EXT_texture_lod_bias",           NULL },
 176     { "GL_3DFX_texture_compression_FXT1",  NULL },
 177     { "GL_APPLE_client_storage",           NULL },
 178     { "GL_MESA_pack_invert",               NULL },
 179     { "GL_MESA_ycbcr_texture",             NULL },
 180     { "GL_NV_blend_square",                NULL },
 181     { "GL_SGIS_generate_mipmap",           NULL },
 182     { NULL,                                NULL }
 183 };
 184
 185
 186
 187 static const struct dri_debug_control debug_control[] =
 188 {
 189     { "fall",  DEBUG_FALLBACKS },
 190     { "tex",   DEBUG_TEXTURE },
 191     { "ioctl", DEBUG_IOCTL },
 192     { "prim",  DEBUG_PRIMS },
 193     { "vert",  DEBUG_VERTS },
 194     { "state", DEBUG_STATE },
 195     { "verb",  DEBUG_VERBOSE },
 196     { "dri",   DEBUG_DRI },
 197     { "dma",   DEBUG_DMA },
 198     { "san",   DEBUG_SANITY },
 199     { "sync",  DEBUG_SYNC },
 200     { "sleep", DEBUG_SLEEP },
 201     { "pix",   DEBUG_PIXEL },
 202     { "buf",   DEBUG_BUFMGR },
 203     { "stats", DEBUG_STATS },
 204     { "tile",  DEBUG_TILE },
 205     { "sing",  DEBUG_SINGLE_THREAD },
 206     { "thre",  DEBUG_SINGLE_THREAD },
 207     { "wm",    DEBUG_WM },
 208     { "vs",    DEBUG_VS },
 209     { NULL,    0 }
 210 };
 211
 212
 213 static void intelInvalidateState( GLcontext *ctx, GLuint new_state )
 214 {
 215    struct intel_context *intel = intel_context(ctx);
 216
 217    _swrast_InvalidateState( ctx, new_state );
 218    _swsetup_InvalidateState( ctx, new_state );
 219    _ac_InvalidateState( ctx, new_state );
 220    _tnl_InvalidateState( ctx, new_state );
 221    _tnl_invalidate_vertex_state( ctx, new_state );
 222
 223    intel->NewGLState |= new_state;
 224
 225    if (intel->vtbl.invalidate_state)
 226       intel->vtbl.invalidate_state( intel, new_state );
 227 }
 228
 229
 230 void intelFlush( GLcontext *ctx )
 231 {
 232    struct intel_context *intel = intel_context( ctx );
 233
 234    bmLockAndFence(intel);
 235 }
 236
 237 void intelFinish( GLcontext *ctx )
 238 {
 239    struct intel_context *intel = intel_context( ctx );
 240
 241    bmFinishFence(intel, bmLockAndFence(intel));
 242 }
 243
 244
 245 void intelInitDriverFunctions( struct dd_function_table *functions )
 246 {
 247    _mesa_init_driver_functions( functions );
 248
 249    functions->Flush = intelFlush;
 250    functions->Finish = intelFinish;
 251    functions->GetString = intelGetString;
 252    functions->UpdateState = intelInvalidateState;
 253    functions->CopyColorTable = _swrast_CopyColorTable;
 254    functions->CopyColorSubTable = _swrast_CopyColorSubTable;
 255    functions->CopyConvolutionFilter1D = _swrast_CopyConvolutionFilter1D;
 256    functions->CopyConvolutionFilter2D = _swrast_CopyConvolutionFilter2D;
 257
 258    /* Pixel path fallbacks.
 259     */
 260    functions->Accum = _swrast_Accum;
 261    functions->Bitmap = _swrast_Bitmap;
 262    functions->ReadPixels = _swrast_ReadPixels;
 263    functions->DrawPixels = _swrast_DrawPixels;
 264
 265    /* CopyPixels can be accelerated even with the current memory
 266     * manager:
 267     */
 268    functions->CopyPixels = intelCopyPixels;
 269
 270    intelInitTextureFuncs( functions );
 271    intelInitStateFuncs( functions );
 272    intelInitBufferFuncs( functions );
 273 }
 274
 275
 276
 277 GLboolean intelInitContext( struct intel_context *intel,
 278                             const __GLcontextModes *mesaVis,
 279                             __DRIcontextPrivate *driContextPriv,
 280                             void *sharedContextPrivate,
 281                             struct dd_function_table *functions )
 282 {
 283    GLcontext *ctx = &intel->ctx;
 284    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 285    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 286    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 287    volatile drmI830Sarea *saPriv = (volatile drmI830Sarea *)
 288       (((GLubyte *)sPriv->pSAREA)+intelScreen->sarea_priv_offset);
 289
 290    if (!_mesa_initialize_context(&intel->ctx,
 291                                  mesaVis, shareCtx,
 292                                  functions,
 293                                  (void*) intel)) {
 294       _mesa_printf("%s: failed to init mesa context\n", __FUNCTION__);
 295       return GL_FALSE;
 296    }
 297
 298    driContextPriv->driverPrivate = intel;
 299    intel->intelScreen = intelScreen;
 300    intel->driScreen = sPriv;
 301    intel->sarea = saPriv;
 302
 303
 304    ctx->Const.MaxTextureMaxAnisotropy = 2.0;
 305
 306    if (getenv("INTEL_STRICT_CONFORMANCE")) {
 307       intel->strict_conformance = 1;
 308    }
 309
 310    if (intel->strict_conformance) {
 311       ctx->Const.MinLineWidth = 1.0;
 312       ctx->Const.MinLineWidthAA = 1.0;
 313       ctx->Const.MaxLineWidth = 1.0;
 314       ctx->Const.MaxLineWidthAA = 1.0;
 315       ctx->Const.LineWidthGranularity = 1.0;
 316    }
 317    else {
 318       ctx->Const.MinLineWidth = 1.0;
 319       ctx->Const.MinLineWidthAA = 1.0;
 320       ctx->Const.MaxLineWidth = 5.0;
 321       ctx->Const.MaxLineWidthAA = 5.0;
 322       ctx->Const.LineWidthGranularity = 0.5;
 323    }
 324
 325    ctx->Const.MinPointSize = 1.0;
 326    ctx->Const.MinPointSizeAA = 1.0;
 327    ctx->Const.MaxPointSize = 255.0;
 328    ctx->Const.MaxPointSizeAA = 3.0;
 329    ctx->Const.PointSizeGranularity = 1.0;
 330
 331    /* Initialize the software rasterizer and helper modules. */
 332    _swrast_CreateContext( ctx );
 333    _ac_CreateContext( ctx );
 334    _tnl_CreateContext( ctx );
 335    _swsetup_CreateContext( ctx );
 336
 337    TNL_CONTEXT(ctx)->Driver.RunPipeline = _tnl_run_pipeline;
 338
 339    /* Configure swrast to match hardware characteristics: */
 340    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 341    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 342
 343    /* Dri stuff */
 344    intel->hHWContext = driContextPriv->hHWContext;
 345    intel->driFd = sPriv->fd;
 346    intel->driHwLock = (drmLock *) &sPriv->pSAREA->lock;
 347
 348    intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 349    intel->hw_stipple = 1;
 350
 351    switch(mesaVis->depthBits) {
 352    case 0:                      /* what to do in this case? */
 353    case 16:
 354       intel->depth_scale = 1.0/0xffff;
 355       intel->polygon_offset_scale = 1.0/0xffff;
 356       intel->depth_clear_mask = ~0;
 357       intel->ClearDepth = 0xffff;
 358       break;
 359    case 24:
 360       intel->depth_scale = 1.0/0xffffff;
 361       intel->polygon_offset_scale = 2.0/0xffffff; /* req'd to pass glean */
 362       intel->depth_clear_mask = 0x00ffffff;
 363       intel->stencil_clear_mask = 0xff000000;
 364       intel->ClearDepth = 0x00ffffff;
 365       break;
 366    default:
 367       assert(0);
 368       break;
 369    }
 370
 371    /* Initialize swrast, tnl driver tables: */
 372    intelInitSpanFuncs( ctx );
 373
 374    intel->no_hw = getenv("INTEL_NO_HW") != NULL;
 375
 376    if (!intel->intelScreen->irq_active) {
 377       _mesa_printf("IRQs not active.  Exiting\n");
 378       exit(1);
 379    }
 380
 381    _math_matrix_ctr (&intel->ViewportMatrix);
 382
 383    driInitExtensions( ctx, card_extensions,
 384                       GL_TRUE );
 385
 386    INTEL_DEBUG  = driParseDebugString( getenv( "INTEL_DEBUG" ),
 387                                        debug_control );
 388
 389
 390    /* Buffer manager:
 391     */
 392    intel->bm = bm_fake_intel_Attach( intel );
 393
 394
 395    bmInitPool(intel,
 396               intel->intelScreen->tex.offset, /* low offset */
 397               intel->intelScreen->tex.map, /* low virtual */
 398               intel->intelScreen->tex.size,
 399               BM_MEM_AGP);
 400
 401    /* These are still static, but create regions for them.
 402     */
 403    intel->front_region =
 404       intel_region_create_static(intel,
 405                                  BM_MEM_AGP,
 406                                  intelScreen->front.offset,
 407                                  intelScreen->front.map,
 408                                  intelScreen->cpp,
 409                                  intelScreen->front.pitch / intelScreen->cpp,
 410                                  intelScreen->height,
 411                                  GL_FALSE);
 412
 413
 414    intel->back_region =
 415       intel_region_create_static(intel,
 416                                  BM_MEM_AGP,
 417                                  intelScreen->back.offset,
 418                                  intelScreen->back.map,
 419                                  intelScreen->cpp,
 420                                  intelScreen->back.pitch / intelScreen->cpp,
 421                                  intelScreen->height,
 422                                  (INTEL_DEBUG & DEBUG_TILE) ? 0 : 1);
 423
 424    /* Still assuming front.cpp == depth.cpp
 425     *
 426     * XXX: Setting tiling to false because Depth tiling only supports
 427     * YMAJOR but the blitter only supports XMAJOR tiling.  Have to
 428     * resolve later.
 429     */
 430    intel->depth_region =
 431       intel_region_create_static(intel,
 432                                  BM_MEM_AGP,
 433                                  intelScreen->depth.offset,
 434                                  intelScreen->depth.map,
 435                                  intelScreen->cpp,
 436                                  intelScreen->depth.pitch / intelScreen->cpp,
 437                                  intelScreen->height,
 438                                  (INTEL_DEBUG & DEBUG_TILE) ? 0 : 1);
 439
 440    intel_bufferobj_init( intel );
 441    intel->batch = intel_batchbuffer_alloc( intel );
 442
 443    if (intel->ctx.Mesa_DXTn) {
 444       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 445       _mesa_enable_extension( ctx, "GL_S3_s3tc" );
 446    }
 447    else if (driQueryOptionb (&intelScreen->optionCache, "force_s3tc_enable")) {
 448       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 449    }
 450
 451 /*    driInitTextureObjects( ctx, & intel->swapped, */
 452 /*                        DRI_TEXMGR_DO_TEXTURE_1D | */
 453 /*                        DRI_TEXMGR_DO_TEXTURE_2D |  */
 454 /*                        DRI_TEXMGR_DO_TEXTURE_RECT ); */
 455
 456
 457    if (getenv("INTEL_NO_RAST")) {
 458       fprintf(stderr, "disabling 3D rasterization\n");
 459       intel->no_rast = 1;
 460    }
 461
 462
 463    return GL_TRUE;
 464 }
 465
 466 void intelDestroyContext(__DRIcontextPrivate *driContextPriv)
 467 {
 468    struct intel_context *intel = (struct intel_context *) driContextPriv->driverPrivate;
 469
 470    assert(intel); /* should never be null */
 471    if (intel) {
 472       GLboolean   release_texture_heaps;
 473
 474
 475       intel->vtbl.destroy( intel );
 476
 477       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 478       _swsetup_DestroyContext (&intel->ctx);
 479       _tnl_DestroyContext (&intel->ctx);
 480       _ac_DestroyContext (&intel->ctx);
 481
 482       _swrast_DestroyContext (&intel->ctx);
 483       intel->Fallback = 0;      /* don't call _swrast_Flush later */
 484       intel_batchbuffer_free(intel->batch);
 485       intel->batch = NULL;
 486
 487
 488       if ( release_texture_heaps ) {
 489          /* This share group is about to go away, free our private
 490           * texture object data.
 491           */
 492
 493          /* XXX: destroy the shared bufmgr struct here?
 494           */
 495       }
 496
 497       /* Free the regions created to describe front/back/depth
 498        * buffers:
 499        */
 500 #if 0
 501       intel_region_release(intel, &intel->front_region);
 502       intel_region_release(intel, &intel->back_region);
 503       intel_region_release(intel, &intel->depth_region);
 504       intel_region_release(intel, &intel->draw_region);
 505 #endif
 506
 507       /* free the Mesa context */
 508       _mesa_destroy_context(&intel->ctx);
 509    }
 510
 511    driContextPriv->driverPrivate = NULL;
 512 }
 513
 514 GLboolean intelUnbindContext(__DRIcontextPrivate *driContextPriv)
 515 {
 516    return GL_TRUE;
 517 }
 518
 519 GLboolean intelMakeCurrent(__DRIcontextPrivate *driContextPriv,
 520                           __DRIdrawablePrivate *driDrawPriv,
 521                           __DRIdrawablePrivate *driReadPriv)
 522 {
 523
 524    if (driContextPriv) {
 525       struct intel_context *intel = (struct intel_context *) driContextPriv->driverPrivate;
 526
 527       if ( intel->driDrawable != driDrawPriv ) {
 528          /* Shouldn't the readbuffer be stored also? */
 529          intel->driDrawable = driDrawPriv;
 530          intelWindowMoved( intel );
 531       }
 532
 533       _mesa_make_current(&intel->ctx,
 534                          (GLframebuffer *) driDrawPriv->driverPrivate,
 535                          (GLframebuffer *) driReadPriv->driverPrivate);
 536
 537       intel->ctx.Driver.DrawBuffer( &intel->ctx, intel->ctx.Color.DrawBuffer[0] );
 538    } else {
 539       _mesa_make_current(NULL, NULL, NULL);
 540    }
 541
 542    return GL_TRUE;
 543 }
 544
 545
 546 static void intelContendedLock( struct intel_context *intel, GLuint flags )
 547 {
 548    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 549    __DRIscreenPrivate *sPriv = intel->driScreen;
 550    volatile drmI830Sarea * sarea = intel->sarea;
 551    int me = intel->hHWContext;
 552    int my_bufmgr = bmCtxId(intel);
 553
 554    drmGetLock(intel->driFd, intel->hHWContext, flags);
 555
 556    /* If the window moved, may need to set a new cliprect now.
 557     *
 558     * NOTE: This releases and regains the hw lock, so all state
 559     * checking must be done *after* this call:
 560     */
 561    if (dPriv)
 562       DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 563
 564
 565    intel->locked = 1;
 566    intel->need_flush = 1;
 567
 568    /* Lost context?
 569     */
 570    if (sarea->ctxOwner != me) {
 571       DBG("Lost Context: sarea->ctxOwner %x me %x\n", sarea->ctxOwner, me);
 572       sarea->ctxOwner = me;
 573       intel->vtbl.lost_hardware( intel );
 574    }
 575
 576    /* As above, but don't evict the texture data on transitions
 577     * between contexts which all share a local buffer manager.
 578     */
 579    if (sarea->texAge != my_bufmgr) {
 580       DBG("Lost Textures: sarea->texAge %x my_bufmgr %x\n", sarea->ctxOwner, my_bufmgr);
 581       sarea->texAge = my_bufmgr;
 582       bm_fake_NotifyContendedLockTake( intel );
 583    }
 584
 585    /* Drawable changed?
 586     */
 587    if (dPriv && intel->lastStamp != dPriv->lastStamp) {
 588       intelWindowMoved( intel );
 589       intel->lastStamp = dPriv->lastStamp;
 590
 591       /* This works because the lock is always grabbed before emitting
 592        * commands and commands are always flushed prior to releasing
 593        * the lock.
 594        */
 595       intel->NewGLState |= _NEW_WINDOW_POS;
 596    }
 597 }
 598
 599 _glthread_DECLARE_STATIC_MUTEX(lockMutex);
 600
 601 /* Lock the hardware and validate our state.
 602  */
 603 void LOCK_HARDWARE( struct intel_context *intel )
 604 {
 605     char __ret=0;
 606
 607     _glthread_LOCK_MUTEX(lockMutex);
 608     assert(!intel->locked);
 609
 610
 611     DRM_CAS(intel->driHwLock, intel->hHWContext,
 612             (DRM_LOCK_HELD|intel->hHWContext), __ret);
 613     if (__ret)
 614         intelContendedLock( intel, 0 );
 615
 616    intel->locked = 1;
 617
 618    if (intel->aub_wrap) {
 619       bm_fake_NotifyContendedLockTake( intel );
 620       intel->vtbl.lost_hardware( intel );
 621       intel->vtbl.aub_wrap(intel);
 622       intel->aub_wrap = 0;
 623    }
 624
 625    if (bmError(intel)) {
 626       bmEvictAll(intel);
 627       intel->vtbl.lost_hardware( intel );
 628    }
 629
 630    /* Make sure nothing has been emitted prior to getting the lock:
 631     */
 632    assert(intel->batch->map == 0);
 633
 634    /* XXX: postpone, may not be needed:
 635     */
 636    if (!intel_batchbuffer_map(intel->batch)) {
 637       bmEvictAll(intel);
 638       intel->vtbl.lost_hardware( intel );
 639
 640       /* This could only fail if the batchbuffer was greater in size
 641        * than the available texture memory:
 642        */
 643       if (!intel_batchbuffer_map(intel->batch)) {
 644          _mesa_printf("double failure to map batchbuffer\n");
 645          assert(0);
 646       }
 647    }
 648 }
 649
 650
 651 /* Unlock the hardware using the global current context
 652  */
 653 void UNLOCK_HARDWARE( struct intel_context *intel )
 654 {
 655    /* Make sure everything has been released:
 656     */
 657    assert(intel->batch->ptr == intel->batch->map + intel->batch->offset);
 658
 659    intel_batchbuffer_unmap(intel->batch);
 660    intel->vtbl.note_unlock( intel );
 661    intel->locked = 0;
 662
 663
 664
 665    DRM_UNLOCK(intel->driFd, intel->driHwLock, intel->hHWContext);
 666    _glthread_UNLOCK_MUTEX(lockMutex);
 667 }
 668