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 "array_cache/acache.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
  50 #include "i830_dri.h"
  51 #include "i830_common.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_buffer_objects.h"
  60
  61 #include "bufmgr.h"
  62
  63 #include "utils.h"
  64 #include "vblank.h"
  65 #ifndef INTEL_DEBUG
  66 int INTEL_DEBUG = (0);
  67 #endif
  68
  69 #define need_GL_ARB_multisample
  70 #define need_GL_ARB_point_parameters
  71 #define need_GL_ARB_texture_compression
  72 #define need_GL_ARB_vertex_buffer_object
  73 #define need_GL_ARB_vertex_program
  74 #define need_GL_ARB_window_pos
  75 #define need_GL_ARB_occlusion_query
  76 #define need_GL_EXT_blend_color
  77 #define need_GL_EXT_blend_equation_separate
  78 #define need_GL_EXT_blend_func_separate
  79 #define need_GL_EXT_blend_minmax
  80 #define need_GL_EXT_cull_vertex
  81 #define need_GL_EXT_fog_coord
  82 #define need_GL_EXT_multi_draw_arrays
  83 #define need_GL_EXT_secondary_color
  84 #include "extension_helper.h"
  85
  86 #ifndef VERBOSE
  87 int VERBOSE = 0;
  88 #endif
  89
  90 /***************************************
  91  * Mesa's Driver Functions
  92  ***************************************/
  93
  94 #define DRIVER_VERSION                     "4.1.3002"
  95
  96 static const GLubyte *intelGetString( GLcontext *ctx, GLenum name )
  97 {
  98    const char * chipset;
  99    static char buffer[128];
 100
 101    switch (name) {
 102    case GL_VENDOR:
 103       return (GLubyte *)"Tungsten Graphics, Inc";
 104       break;
 105
 106    case GL_RENDERER:
 107       switch (intel_context(ctx)->intelScreen->deviceID) {
 108       case PCI_CHIP_I965_Q:
 109          chipset = "Intel(R) 965Q"; break;
 110          break;
 111       case PCI_CHIP_I965_G:
 112       case PCI_CHIP_I965_G_1:
 113          chipset = "Intel(R) 965G"; break;
 114          break;
 115       case PCI_CHIP_I946_GZ:
 116          chipset = "Intel(R) 946GZ"; break;
 117          break;
 118       default:
 119          chipset = "Unknown Intel Chipset"; break;
 120       }
 121
 122       (void) driGetRendererString( buffer, chipset, DRIVER_VERSION, 0 );
 123       return (GLubyte *) buffer;
 124
 125    default:
 126       return NULL;
 127    }
 128 }
 129
 130
 131 /**
 132  * Extension strings exported by the intel driver.
 133  *
 134  * \note
 135  * It appears that ARB_texture_env_crossbar has "disappeared" compared to the
 136  * old i830-specific driver.
 137  */
 138 const struct dri_extension card_extensions[] =
 139 {
 140     { "GL_ARB_multisample",                GL_ARB_multisample_functions },
 141     { "GL_ARB_multitexture",               NULL },
 142     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 143     { "GL_ARB_texture_border_clamp",       NULL },
 144     { "GL_ARB_texture_compression",        GL_ARB_texture_compression_functions },
 145     { "GL_ARB_texture_cube_map",           NULL },
 146     { "GL_ARB_texture_env_add",            NULL },
 147     { "GL_ARB_texture_env_combine",        NULL },
 148     { "GL_ARB_texture_env_dot3",           NULL },
 149     { "GL_ARB_texture_mirrored_repeat",    NULL },
 150     { "GL_ARB_texture_non_power_of_two",   NULL },
 151     { "GL_ARB_texture_rectangle",          NULL },
 152     { "GL_NV_texture_rectangle",           NULL },
 153     { "GL_EXT_texture_rectangle",          NULL },
 154     { "GL_ARB_texture_rectangle",          NULL },
 155     { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
 156     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions },
 157     { "GL_ARB_window_pos",                 GL_ARB_window_pos_functions },
 158     { "GL_EXT_blend_color",                GL_EXT_blend_color_functions },
 159     { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
 160     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
 161     { "GL_EXT_blend_minmax",               GL_EXT_blend_minmax_functions },
 162     { "GL_EXT_blend_logic_op",             NULL },
 163     { "GL_EXT_blend_subtract",             NULL },
 164     { "GL_EXT_cull_vertex",                GL_EXT_cull_vertex_functions },
 165     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
 166     { "GL_EXT_multi_draw_arrays",          GL_EXT_multi_draw_arrays_functions },
 167     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 168     { "GL_EXT_stencil_wrap",               NULL },
 169     { "GL_EXT_texture_edge_clamp",         NULL },
 170     { "GL_EXT_texture_env_combine",        NULL },
 171     { "GL_EXT_texture_env_dot3",           NULL },
 172     { "GL_EXT_texture_filter_anisotropic", NULL },
 173     { "GL_EXT_texture_lod_bias",           NULL },
 174     { "GL_3DFX_texture_compression_FXT1",  NULL },
 175     { "GL_APPLE_client_storage",           NULL },
 176     { "GL_MESA_pack_invert",               NULL },
 177     { "GL_MESA_ycbcr_texture",             NULL },
 178     { "GL_NV_blend_square",                NULL },
 179     { "GL_SGIS_generate_mipmap",           NULL },
 180     { NULL,                                NULL }
 181 };
 182
 183 const struct dri_extension arb_oc_extension =
 184     { "GL_ARB_occlusion_query",            GL_ARB_occlusion_query_functions};
 185
 186 void intelInitExtensions(GLcontext *ctx, GLboolean enable_imaging)
 187 {
 188         struct intel_context *intel = ctx?intel_context(ctx):NULL;
 189         driInitExtensions(ctx, card_extensions, enable_imaging);
 190         if (!ctx || intel->intelScreen->drmMinor >= 8)
 191                 driInitSingleExtension (ctx, &arb_oc_extension);
 192 }
 193
 194 static const struct dri_debug_control debug_control[] =
 195 {
 196     { "fall",  DEBUG_FALLBACKS },
 197     { "tex",   DEBUG_TEXTURE },
 198     { "ioctl", DEBUG_IOCTL },
 199     { "prim",  DEBUG_PRIMS },
 200     { "vert",  DEBUG_VERTS },
 201     { "state", DEBUG_STATE },
 202     { "verb",  DEBUG_VERBOSE },
 203     { "dri",   DEBUG_DRI },
 204     { "dma",   DEBUG_DMA },
 205     { "san",   DEBUG_SANITY },
 206     { "sync",  DEBUG_SYNC },
 207     { "sleep", DEBUG_SLEEP },
 208     { "pix",   DEBUG_PIXEL },
 209     { "buf",   DEBUG_BUFMGR },
 210     { "stats", DEBUG_STATS },
 211     { "tile",  DEBUG_TILE },
 212     { "sing",  DEBUG_SINGLE_THREAD },
 213     { "thre",  DEBUG_SINGLE_THREAD },
 214     { "wm",    DEBUG_WM },
 215     { "vs",    DEBUG_VS },
 216     { NULL,    0 }
 217 };
 218
 219
 220 static void intelInvalidateState( GLcontext *ctx, GLuint new_state )
 221 {
 222    struct intel_context *intel = intel_context(ctx);
 223
 224    _swrast_InvalidateState( ctx, new_state );
 225    _swsetup_InvalidateState( ctx, new_state );
 226    _ac_InvalidateState( ctx, new_state );
 227    _tnl_InvalidateState( ctx, new_state );
 228    _tnl_invalidate_vertex_state( ctx, new_state );
 229
 230    intel->NewGLState |= new_state;
 231
 232    if (intel->vtbl.invalidate_state)
 233       intel->vtbl.invalidate_state( intel, new_state );
 234 }
 235
 236
 237 void intelFlush( GLcontext *ctx )
 238 {
 239    struct intel_context *intel = intel_context( ctx );
 240
 241    bmLockAndFence(intel);
 242 }
 243
 244 void intelFinish( GLcontext *ctx )
 245 {
 246    struct intel_context *intel = intel_context( ctx );
 247
 248    bmFinishFence(intel, bmLockAndFence(intel));
 249 }
 250
 251 static void
 252 intelBeginQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
 253 {
 254         struct intel_context *intel = intel_context( ctx );
 255         drmI830MMIO io = {
 256                 .read_write = MMIO_READ,
 257                 .reg = MMIO_REGS_PS_DEPTH_COUNT,
 258                 .data = &q->Result
 259         };
 260         intel->stats_wm++;
 261         intelFinish(&intel->ctx);
 262         drmCommandRead(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
 263 }
 264
 265 static void
 266 intelEndQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
 267 {
 268         struct intel_context *intel = intel_context( ctx );
 269         GLuint64EXT tmp;
 270         drmI830MMIO io = {
 271                 .read_write = MMIO_READ,
 272                 .reg = MMIO_REGS_PS_DEPTH_COUNT,
 273                 .data = &tmp
 274         };
 275         intelFinish(&intel->ctx);
 276         drmCommandRead(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
 277         q->Result = tmp - q->Result;
 278         q->Ready = GL_TRUE;
 279         intel->stats_wm--;
 280 }
 281
 282
 283 void intelInitDriverFunctions( struct dd_function_table *functions )
 284 {
 285    _mesa_init_driver_functions( functions );
 286
 287    functions->Flush = intelFlush;
 288    functions->Finish = intelFinish;
 289    functions->GetString = intelGetString;
 290    functions->UpdateState = intelInvalidateState;
 291    functions->BeginQuery = intelBeginQuery;
 292    functions->EndQuery = intelEndQuery;
 293
 294    /* CopyPixels can be accelerated even with the current memory
 295     * manager:
 296     */
 297    if (!getenv("INTEL_NO_BLIT")) {
 298       functions->CopyPixels = intelCopyPixels;
 299       functions->Bitmap = intelBitmap;
 300    }
 301
 302    intelInitTextureFuncs( functions );
 303    intelInitStateFuncs( functions );
 304    intelInitBufferFuncs( functions );
 305 }
 306
 307
 308
 309 GLboolean intelInitContext( struct intel_context *intel,
 310                             const __GLcontextModes *mesaVis,
 311                             __DRIcontextPrivate *driContextPriv,
 312                             void *sharedContextPrivate,
 313                             struct dd_function_table *functions )
 314 {
 315    GLcontext *ctx = &intel->ctx;
 316    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 317    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 318    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 319    volatile drmI830Sarea *saPriv = (volatile drmI830Sarea *)
 320       (((GLubyte *)sPriv->pSAREA)+intelScreen->sarea_priv_offset);
 321
 322    if (!_mesa_initialize_context(&intel->ctx,
 323                                  mesaVis, shareCtx,
 324                                  functions,
 325                                  (void*) intel)) {
 326       _mesa_printf("%s: failed to init mesa context\n", __FUNCTION__);
 327       return GL_FALSE;
 328    }
 329
 330    driContextPriv->driverPrivate = intel;
 331    intel->intelScreen = intelScreen;
 332    intel->driScreen = sPriv;
 333    intel->sarea = saPriv;
 334
 335    driParseConfigFiles (&intel->optionCache, &intelScreen->optionCache,
 336                    intel->driScreen->myNum, "i965");
 337
 338    intel->vblank_flags = (intel->intelScreen->irq_active != 0)
 339            ? driGetDefaultVBlankFlags(&intel->optionCache) : VBLANK_FLAG_NO_IRQ;
 340
 341    ctx->Const.MaxTextureMaxAnisotropy = 2.0;
 342
 343    if (getenv("INTEL_STRICT_CONFORMANCE")) {
 344       intel->strict_conformance = 1;
 345    }
 346
 347    if (intel->strict_conformance) {
 348       ctx->Const.MinLineWidth = 1.0;
 349       ctx->Const.MinLineWidthAA = 1.0;
 350       ctx->Const.MaxLineWidth = 1.0;
 351       ctx->Const.MaxLineWidthAA = 1.0;
 352       ctx->Const.LineWidthGranularity = 1.0;
 353    }
 354    else {
 355       ctx->Const.MinLineWidth = 1.0;
 356       ctx->Const.MinLineWidthAA = 1.0;
 357       ctx->Const.MaxLineWidth = 5.0;
 358       ctx->Const.MaxLineWidthAA = 5.0;
 359       ctx->Const.LineWidthGranularity = 0.5;
 360    }
 361
 362    ctx->Const.MinPointSize = 1.0;
 363    ctx->Const.MinPointSizeAA = 1.0;
 364    ctx->Const.MaxPointSize = 255.0;
 365    ctx->Const.MaxPointSizeAA = 3.0;
 366    ctx->Const.PointSizeGranularity = 1.0;
 367
 368    /* reinitialize the context point state.
 369     * It depend on constants in __GLcontextRec::Const
 370     */
 371    _mesa_init_point(ctx);
 372
 373    /* Initialize the software rasterizer and helper modules. */
 374    _swrast_CreateContext( ctx );
 375    _ac_CreateContext( ctx );
 376    _tnl_CreateContext( ctx );
 377    _swsetup_CreateContext( ctx );
 378
 379    TNL_CONTEXT(ctx)->Driver.RunPipeline = _tnl_run_pipeline;
 380
 381    /* Configure swrast to match hardware characteristics: */
 382    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 383    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 384
 385    /* Dri stuff */
 386    intel->hHWContext = driContextPriv->hHWContext;
 387    intel->driFd = sPriv->fd;
 388    intel->driHwLock = (drmLock *) &sPriv->pSAREA->lock;
 389
 390    intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 391    intel->hw_stipple = 1;
 392
 393    switch(mesaVis->depthBits) {
 394    case 0:                      /* what to do in this case? */
 395    case 16:
 396       intel->depth_scale = 1.0/0xffff;
 397       intel->polygon_offset_scale = 1.0/0xffff;
 398       intel->depth_clear_mask = ~0;
 399       intel->ClearDepth = 0xffff;
 400       break;
 401    case 24:
 402       intel->depth_scale = 1.0/0xffffff;
 403       intel->polygon_offset_scale = 2.0/0xffffff; /* req'd to pass glean */
 404       intel->depth_clear_mask = 0x00ffffff;
 405       intel->stencil_clear_mask = 0xff000000;
 406       intel->ClearDepth = 0x00ffffff;
 407       break;
 408    default:
 409       assert(0);
 410       break;
 411    }
 412
 413    /* Initialize swrast, tnl driver tables: */
 414    intelInitSpanFuncs( ctx );
 415
 416    intel->no_hw = getenv("INTEL_NO_HW") != NULL;
 417
 418    if (!intel->intelScreen->irq_active) {
 419       _mesa_printf("IRQs not active.  Exiting\n");
 420       exit(1);
 421    }
 422    intelInitExtensions(ctx, GL_TRUE);
 423
 424    INTEL_DEBUG  = driParseDebugString( getenv( "INTEL_DEBUG" ),
 425                                        debug_control );
 426
 427
 428    /* Buffer manager:
 429     */
 430    intel->bm = bm_fake_intel_Attach( intel );
 431
 432
 433    bmInitPool(intel,
 434               intel->intelScreen->tex.offset, /* low offset */
 435               intel->intelScreen->tex.map, /* low virtual */
 436               intel->intelScreen->tex.size,
 437               BM_MEM_AGP);
 438
 439    /* These are still static, but create regions for them.
 440     */
 441    intel->front_region =
 442       intel_region_create_static(intel,
 443                                  BM_MEM_AGP,
 444                                  intelScreen->front.offset,
 445                                  intelScreen->front.map,
 446                                  intelScreen->cpp,
 447                                  intelScreen->front.pitch / intelScreen->cpp,
 448                                  intelScreen->height,
 449                                  intelScreen->front.tiled != 0); /* 0: LINEAR */
 450
 451
 452    intel->back_region =
 453       intel_region_create_static(intel,
 454                                  BM_MEM_AGP,
 455                                  intelScreen->back.offset,
 456                                  intelScreen->back.map,
 457                                  intelScreen->cpp,
 458                                  intelScreen->back.pitch / intelScreen->cpp,
 459                                  intelScreen->height,
 460                                  intelScreen->back.tiled != 0);
 461
 462    /* Still assuming front.cpp == depth.cpp
 463     *
 464     * XXX: Setting tiling to false because Depth tiling only supports
 465     * YMAJOR but the blitter only supports XMAJOR tiling.  Have to
 466     * resolve later.
 467     */
 468    intel->depth_region =
 469       intel_region_create_static(intel,
 470                                  BM_MEM_AGP,
 471                                  intelScreen->depth.offset,
 472                                  intelScreen->depth.map,
 473                                  intelScreen->cpp,
 474                                  intelScreen->depth.pitch / intelScreen->cpp,
 475                                  intelScreen->height,
 476                                  intelScreen->depth.tiled != 0);
 477
 478    intel_bufferobj_init( intel );
 479    intel->batch = intel_batchbuffer_alloc( intel );
 480
 481    if (intel->ctx.Mesa_DXTn) {
 482       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 483       _mesa_enable_extension( ctx, "GL_S3_s3tc" );
 484    }
 485    else if (driQueryOptionb (&intelScreen->optionCache, "force_s3tc_enable")) {
 486       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 487    }
 488
 489 /*    driInitTextureObjects( ctx, & intel->swapped, */
 490 /*                        DRI_TEXMGR_DO_TEXTURE_1D | */
 491 /*                        DRI_TEXMGR_DO_TEXTURE_2D |  */
 492 /*                        DRI_TEXMGR_DO_TEXTURE_RECT ); */
 493
 494
 495    if (getenv("INTEL_NO_RAST")) {
 496       fprintf(stderr, "disabling 3D rasterization\n");
 497       intel->no_rast = 1;
 498    }
 499
 500
 501    return GL_TRUE;
 502 }
 503
 504 void intelDestroyContext(__DRIcontextPrivate *driContextPriv)
 505 {
 506    struct intel_context *intel = (struct intel_context *) driContextPriv->driverPrivate;
 507
 508    assert(intel); /* should never be null */
 509    if (intel) {
 510       GLboolean   release_texture_heaps;
 511
 512
 513       intel->vtbl.destroy( intel );
 514
 515       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 516       _swsetup_DestroyContext (&intel->ctx);
 517       _tnl_DestroyContext (&intel->ctx);
 518       _ac_DestroyContext (&intel->ctx);
 519
 520       _swrast_DestroyContext (&intel->ctx);
 521       intel->Fallback = 0;      /* don't call _swrast_Flush later */
 522       intel_batchbuffer_free(intel->batch);
 523       intel->batch = NULL;
 524
 525
 526       if ( release_texture_heaps ) {
 527          /* This share group is about to go away, free our private
 528           * texture object data.
 529           */
 530
 531          /* XXX: destroy the shared bufmgr struct here?
 532           */
 533       }
 534
 535       /* Free the regions created to describe front/back/depth
 536        * buffers:
 537        */
 538 #if 0
 539       intel_region_release(intel, &intel->front_region);
 540       intel_region_release(intel, &intel->back_region);
 541       intel_region_release(intel, &intel->depth_region);
 542       intel_region_release(intel, &intel->draw_region);
 543 #endif
 544
 545       /* free the Mesa context */
 546       _mesa_destroy_context(&intel->ctx);
 547    }
 548
 549    driContextPriv->driverPrivate = NULL;
 550 }
 551
 552 GLboolean intelUnbindContext(__DRIcontextPrivate *driContextPriv)
 553 {
 554    return GL_TRUE;
 555 }
 556
 557 GLboolean intelMakeCurrent(__DRIcontextPrivate *driContextPriv,
 558                           __DRIdrawablePrivate *driDrawPriv,
 559                           __DRIdrawablePrivate *driReadPriv)
 560 {
 561
 562    if (driContextPriv) {
 563       struct intel_context *intel = (struct intel_context *) driContextPriv->driverPrivate;
 564
 565       if ( intel->driDrawable != driDrawPriv ) {
 566          /* Shouldn't the readbuffer be stored also? */
 567          driDrawableInitVBlank( driDrawPriv, intel->vblank_flags,
 568                       &intel->vbl_seq );
 569
 570          intel->driDrawable = driDrawPriv;
 571          intelWindowMoved( intel );
 572       }
 573
 574       _mesa_make_current(&intel->ctx,
 575                          (GLframebuffer *) driDrawPriv->driverPrivate,
 576                          (GLframebuffer *) driReadPriv->driverPrivate);
 577
 578       intel->ctx.Driver.DrawBuffer( &intel->ctx, intel->ctx.Color.DrawBuffer[0] );
 579    } else {
 580       _mesa_make_current(NULL, NULL, NULL);
 581    }
 582
 583    return GL_TRUE;
 584 }
 585
 586
 587 static void intelContendedLock( struct intel_context *intel, GLuint flags )
 588 {
 589    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 590    __DRIscreenPrivate *sPriv = intel->driScreen;
 591    volatile drmI830Sarea * sarea = intel->sarea;
 592    int me = intel->hHWContext;
 593    int my_bufmgr = bmCtxId(intel);
 594
 595    drmGetLock(intel->driFd, intel->hHWContext, flags);
 596
 597    /* If the window moved, may need to set a new cliprect now.
 598     *
 599     * NOTE: This releases and regains the hw lock, so all state
 600     * checking must be done *after* this call:
 601     */
 602    if (dPriv)
 603       DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 604
 605
 606    intel->locked = 1;
 607    intel->need_flush = 1;
 608
 609    /* Lost context?
 610     */
 611    if (sarea->ctxOwner != me) {
 612       DBG("Lost Context: sarea->ctxOwner %x me %x\n", sarea->ctxOwner, me);
 613       sarea->ctxOwner = me;
 614       intel->vtbl.lost_hardware( intel );
 615    }
 616
 617    /* As above, but don't evict the texture data on transitions
 618     * between contexts which all share a local buffer manager.
 619     */
 620    if (sarea->texAge != my_bufmgr) {
 621       DBG("Lost Textures: sarea->texAge %x my_bufmgr %x\n", sarea->ctxOwner, my_bufmgr);
 622       sarea->texAge = my_bufmgr;
 623       bm_fake_NotifyContendedLockTake( intel );
 624    }
 625
 626    /* Drawable changed?
 627     */
 628    if (dPriv && intel->lastStamp != dPriv->lastStamp) {
 629       intelWindowMoved( intel );
 630       intel->lastStamp = dPriv->lastStamp;
 631    }
 632 }
 633
 634 _glthread_DECLARE_STATIC_MUTEX(lockMutex);
 635
 636 /* Lock the hardware and validate our state.
 637  */
 638 void LOCK_HARDWARE( struct intel_context *intel )
 639 {
 640     char __ret=0;
 641
 642     _glthread_LOCK_MUTEX(lockMutex);
 643     assert(!intel->locked);
 644
 645
 646     DRM_CAS(intel->driHwLock, intel->hHWContext,
 647             (DRM_LOCK_HELD|intel->hHWContext), __ret);
 648     if (__ret)
 649         intelContendedLock( intel, 0 );
 650
 651    intel->locked = 1;
 652
 653    if (intel->aub_wrap) {
 654       bm_fake_NotifyContendedLockTake( intel );
 655       intel->vtbl.lost_hardware( intel );
 656       intel->vtbl.aub_wrap(intel);
 657       intel->aub_wrap = 0;
 658    }
 659
 660    if (bmError(intel)) {
 661       bmEvictAll(intel);
 662       intel->vtbl.lost_hardware( intel );
 663    }
 664
 665    /* Make sure nothing has been emitted prior to getting the lock:
 666     */
 667    assert(intel->batch->map == 0);
 668
 669    /* XXX: postpone, may not be needed:
 670     */
 671    if (!intel_batchbuffer_map(intel->batch)) {
 672       bmEvictAll(intel);
 673       intel->vtbl.lost_hardware( intel );
 674
 675       /* This could only fail if the batchbuffer was greater in size
 676        * than the available texture memory:
 677        */
 678       if (!intel_batchbuffer_map(intel->batch)) {
 679          _mesa_printf("double failure to map batchbuffer\n");
 680          assert(0);
 681       }
 682    }
 683 }
 684
 685
 686 /* Unlock the hardware using the global current context
 687  */
 688 void UNLOCK_HARDWARE( struct intel_context *intel )
 689 {
 690    /* Make sure everything has been released:
 691     */
 692    assert(intel->batch->ptr == intel->batch->map + intel->batch->offset);
 693
 694    intel_batchbuffer_unmap(intel->batch);
 695    intel->vtbl.note_unlock( intel );
 696    intel->locked = 0;
 697
 698
 699
 700    DRM_UNLOCK(intel->driFd, intel->driHwLock, intel->hHWContext);
 701    _glthread_UNLOCK_MUTEX(lockMutex);
 702 }
 703
 704