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
  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 #define need_GL_VERSION_2_0
  85 #define need_GL_ARB_shader_objects
  86 #define need_GL_ARB_vertex_shader
  87
  88 #include "extension_helper.h"
  89
  90 #ifndef VERBOSE
  91 int VERBOSE = 0;
  92 #endif
  93
  94 /***************************************
  95  * Mesa's Driver Functions
  96  ***************************************/
  97
  98 #define DRIVER_VERSION                     "4.1.3002"
  99
 100 static const GLubyte *intelGetString( GLcontext *ctx, GLenum name )
 101 {
 102    const char * chipset;
 103    static char buffer[128];
 104
 105    switch (name) {
 106    case GL_VENDOR:
 107       return (GLubyte *)"Tungsten Graphics, Inc";
 108       break;
 109
 110    case GL_RENDERER:
 111       switch (intel_context(ctx)->intelScreen->deviceID) {
 112       case PCI_CHIP_I965_Q:
 113          chipset = "Intel(R) 965Q";
 114          break;
 115       case PCI_CHIP_I965_G:
 116       case PCI_CHIP_I965_G_1:
 117          chipset = "Intel(R) 965G";
 118          break;
 119       case PCI_CHIP_I946_GZ:
 120          chipset = "Intel(R) 946GZ";
 121          break;
 122       case PCI_CHIP_I965_GM:
 123          chipset = "Intel(R) 965GM";
 124          break;
 125       case PCI_CHIP_I965_GME:
 126          chipset = "Intel(R) 965GME/GLE";
 127          break;
 128       default:
 129          chipset = "Unknown Intel Chipset";
 130       }
 131
 132       (void) driGetRendererString( buffer, chipset, DRIVER_VERSION, 0 );
 133       return (GLubyte *) buffer;
 134
 135    default:
 136       return NULL;
 137    }
 138 }
 139
 140
 141 /**
 142  * Extension strings exported by the intel driver.
 143  *
 144  * \note
 145  * It appears that ARB_texture_env_crossbar has "disappeared" compared to the
 146  * old i830-specific driver.
 147  */
 148 const struct dri_extension card_extensions[] =
 149 {
 150     { "GL_ARB_multisample",                GL_ARB_multisample_functions },
 151     { "GL_ARB_multitexture",               NULL },
 152     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 153     { "GL_ARB_texture_border_clamp",       NULL },
 154     { "GL_ARB_texture_compression",        GL_ARB_texture_compression_functions },
 155     { "GL_ARB_texture_cube_map",           NULL },
 156     { "GL_ARB_texture_env_add",            NULL },
 157     { "GL_ARB_texture_env_combine",        NULL },
 158     { "GL_ARB_texture_env_dot3",           NULL },
 159     { "GL_ARB_texture_mirrored_repeat",    NULL },
 160     { "GL_ARB_texture_non_power_of_two",   NULL },
 161     { "GL_ARB_texture_rectangle",          NULL },
 162     { "GL_NV_texture_rectangle",           NULL },
 163     { "GL_EXT_texture_rectangle",          NULL },
 164     { "GL_ARB_texture_rectangle",          NULL },
 165     { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
 166     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions },
 167     { "GL_ARB_window_pos",                 GL_ARB_window_pos_functions },
 168     { "GL_EXT_blend_color",                GL_EXT_blend_color_functions },
 169     { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
 170     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
 171     { "GL_EXT_blend_minmax",               GL_EXT_blend_minmax_functions },
 172     { "GL_EXT_blend_logic_op",             NULL },
 173     { "GL_EXT_blend_subtract",             NULL },
 174     { "GL_EXT_cull_vertex",                GL_EXT_cull_vertex_functions },
 175     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
 176     { "GL_EXT_multi_draw_arrays",          GL_EXT_multi_draw_arrays_functions },
 177     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 178     { "GL_EXT_stencil_wrap",               NULL },
 179     { "GL_EXT_texture_edge_clamp",         NULL },
 180     { "GL_EXT_texture_env_combine",        NULL },
 181     { "GL_EXT_texture_env_dot3",           NULL },
 182     { "GL_EXT_texture_filter_anisotropic", NULL },
 183     { "GL_EXT_texture_lod_bias",           NULL },
 184     { "GL_3DFX_texture_compression_FXT1",  NULL },
 185     { "GL_APPLE_client_storage",           NULL },
 186     { "GL_MESA_pack_invert",               NULL },
 187     { "GL_MESA_ycbcr_texture",             NULL },
 188     { "GL_NV_blend_square",                NULL },
 189     { "GL_SGIS_generate_mipmap",           NULL },
 190     { "GL_ARB_shading_language_100",       GL_VERSION_2_0_functions},
 191     { "GL_ARB_shader_objects",             GL_ARB_shader_objects_functions},
 192     { "GL_ARB_vertex_shader",              GL_ARB_vertex_shader_functions},
 193     { "GL_ARB_fragment_shader",            NULL },
 194     /* XXX not implement yet, to compile builtin glsl lib */
 195     { "GL_ARB_draw_buffers",               NULL },
 196     { NULL,                                NULL }
 197 };
 198
 199 const struct dri_extension arb_oc_extension =
 200     { "GL_ARB_occlusion_query",            GL_ARB_occlusion_query_functions};
 201
 202 void intelInitExtensions(GLcontext *ctx, GLboolean enable_imaging)
 203 {
 204         struct intel_context *intel = ctx?intel_context(ctx):NULL;
 205         driInitExtensions(ctx, card_extensions, enable_imaging);
 206         if (!ctx || intel->intelScreen->drmMinor >= 8)
 207                 driInitSingleExtension (ctx, &arb_oc_extension);
 208 }
 209
 210 static const struct dri_debug_control debug_control[] =
 211 {
 212     { "fall",  DEBUG_FALLBACKS },
 213     { "tex",   DEBUG_TEXTURE },
 214     { "ioctl", DEBUG_IOCTL },
 215     { "prim",  DEBUG_PRIMS },
 216     { "vert",  DEBUG_VERTS },
 217     { "state", DEBUG_STATE },
 218     { "verb",  DEBUG_VERBOSE },
 219     { "dri",   DEBUG_DRI },
 220     { "dma",   DEBUG_DMA },
 221     { "san",   DEBUG_SANITY },
 222     { "sync",  DEBUG_SYNC },
 223     { "sleep", DEBUG_SLEEP },
 224     { "pix",   DEBUG_PIXEL },
 225     { "buf",   DEBUG_BUFMGR },
 226     { "stats", DEBUG_STATS },
 227     { "tile",  DEBUG_TILE },
 228     { "sing",  DEBUG_SINGLE_THREAD },
 229     { "thre",  DEBUG_SINGLE_THREAD },
 230     { "wm",    DEBUG_WM },
 231     { "vs",    DEBUG_VS },
 232     { NULL,    0 }
 233 };
 234
 235
 236 static void intelInvalidateState( GLcontext *ctx, GLuint new_state )
 237 {
 238    struct intel_context *intel = intel_context(ctx);
 239
 240    _swrast_InvalidateState( ctx, new_state );
 241    _swsetup_InvalidateState( ctx, new_state );
 242    _vbo_InvalidateState( ctx, new_state );
 243    _tnl_InvalidateState( ctx, new_state );
 244    _tnl_invalidate_vertex_state( ctx, new_state );
 245
 246    intel->NewGLState |= new_state;
 247
 248    if (intel->vtbl.invalidate_state)
 249       intel->vtbl.invalidate_state( intel, new_state );
 250 }
 251
 252
 253 void intelFlush( GLcontext *ctx )
 254 {
 255    struct intel_context *intel = intel_context( ctx );
 256
 257    bmLockAndFence(intel);
 258 }
 259
 260 void intelFinish( GLcontext *ctx )
 261 {
 262    struct intel_context *intel = intel_context( ctx );
 263
 264    bmFinishFence(intel, bmLockAndFence(intel));
 265 }
 266
 267 static void
 268 intelBeginQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
 269 {
 270         struct intel_context *intel = intel_context( ctx );
 271         drmI830MMIO io = {
 272                 .read_write = MMIO_READ,
 273                 .reg = MMIO_REGS_PS_DEPTH_COUNT,
 274                 .data = &q->Result
 275         };
 276         intel->stats_wm++;
 277         intelFinish(&intel->ctx);
 278         drmCommandRead(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
 279 }
 280
 281 static void
 282 intelEndQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
 283 {
 284         struct intel_context *intel = intel_context( ctx );
 285         GLuint64EXT tmp;
 286         drmI830MMIO io = {
 287                 .read_write = MMIO_READ,
 288                 .reg = MMIO_REGS_PS_DEPTH_COUNT,
 289                 .data = &tmp
 290         };
 291         intelFinish(&intel->ctx);
 292         drmCommandRead(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
 293         q->Result = tmp - q->Result;
 294         q->Ready = GL_TRUE;
 295         intel->stats_wm--;
 296 }
 297
 298
 299 void intelInitDriverFunctions( struct dd_function_table *functions )
 300 {
 301    _mesa_init_driver_functions( functions );
 302
 303    functions->Flush = intelFlush;
 304    functions->Finish = intelFinish;
 305    functions->GetString = intelGetString;
 306    functions->UpdateState = intelInvalidateState;
 307    functions->BeginQuery = intelBeginQuery;
 308    functions->EndQuery = intelEndQuery;
 309
 310    /* CopyPixels can be accelerated even with the current memory
 311     * manager:
 312     */
 313    if (!getenv("INTEL_NO_BLIT")) {
 314       functions->CopyPixels = intelCopyPixels;
 315       functions->Bitmap = intelBitmap;
 316    }
 317
 318    intelInitTextureFuncs( functions );
 319    intelInitStateFuncs( functions );
 320    intelInitBufferFuncs( functions );
 321 }
 322
 323
 324
 325 GLboolean intelInitContext( struct intel_context *intel,
 326                             const __GLcontextModes *mesaVis,
 327                             __DRIcontextPrivate *driContextPriv,
 328                             void *sharedContextPrivate,
 329                             struct dd_function_table *functions )
 330 {
 331    GLcontext *ctx = &intel->ctx;
 332    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 333    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 334    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 335    volatile drmI830Sarea *saPriv = (volatile drmI830Sarea *)
 336       (((GLubyte *)sPriv->pSAREA)+intelScreen->sarea_priv_offset);
 337
 338    if (!_mesa_initialize_context(&intel->ctx,
 339                                  mesaVis, shareCtx,
 340                                  functions,
 341                                  (void*) intel)) {
 342       _mesa_printf("%s: failed to init mesa context\n", __FUNCTION__);
 343       return GL_FALSE;
 344    }
 345
 346    driContextPriv->driverPrivate = intel;
 347    intel->intelScreen = intelScreen;
 348    intel->driScreen = sPriv;
 349    intel->sarea = saPriv;
 350
 351    driParseConfigFiles (&intel->optionCache, &intelScreen->optionCache,
 352                    intel->driScreen->myNum, "i965");
 353
 354    intel->vblank_flags = (intel->intelScreen->irq_active != 0)
 355            ? driGetDefaultVBlankFlags(&intel->optionCache) : VBLANK_FLAG_NO_IRQ;
 356
 357    ctx->Const.MaxTextureMaxAnisotropy = 2.0;
 358
 359    if (getenv("INTEL_STRICT_CONFORMANCE")) {
 360       intel->strict_conformance = 1;
 361    }
 362
 363    if (intel->strict_conformance) {
 364       ctx->Const.MinLineWidth = 1.0;
 365       ctx->Const.MinLineWidthAA = 1.0;
 366       ctx->Const.MaxLineWidth = 1.0;
 367       ctx->Const.MaxLineWidthAA = 1.0;
 368       ctx->Const.LineWidthGranularity = 1.0;
 369    }
 370    else {
 371       ctx->Const.MinLineWidth = 1.0;
 372       ctx->Const.MinLineWidthAA = 1.0;
 373       ctx->Const.MaxLineWidth = 5.0;
 374       ctx->Const.MaxLineWidthAA = 5.0;
 375       ctx->Const.LineWidthGranularity = 0.5;
 376    }
 377
 378    ctx->Const.MinPointSize = 1.0;
 379    ctx->Const.MinPointSizeAA = 1.0;
 380    ctx->Const.MaxPointSize = 255.0;
 381    ctx->Const.MaxPointSizeAA = 3.0;
 382    ctx->Const.PointSizeGranularity = 1.0;
 383
 384    /* reinitialize the context point state.
 385     * It depend on constants in __GLcontextRec::Const
 386     */
 387    _mesa_init_point(ctx);
 388
 389    /* Initialize the software rasterizer and helper modules. */
 390    _swrast_CreateContext( ctx );
 391    _vbo_CreateContext( ctx );
 392    _tnl_CreateContext( ctx );
 393    _swsetup_CreateContext( ctx );
 394
 395    TNL_CONTEXT(ctx)->Driver.RunPipeline = _tnl_run_pipeline;
 396
 397    /* Configure swrast to match hardware characteristics: */
 398    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 399    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 400
 401    /* Dri stuff */
 402    intel->hHWContext = driContextPriv->hHWContext;
 403    intel->driFd = sPriv->fd;
 404    intel->driHwLock = (drmLock *) &sPriv->pSAREA->lock;
 405
 406    intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 407    intel->hw_stipple = 1;
 408
 409    switch(mesaVis->depthBits) {
 410    case 0:                      /* what to do in this case? */
 411    case 16:
 412       intel->depth_scale = 1.0/0xffff;
 413       intel->polygon_offset_scale = 1.0/0xffff;
 414       intel->depth_clear_mask = ~0;
 415       intel->ClearDepth = 0xffff;
 416       break;
 417    case 24:
 418       intel->depth_scale = 1.0/0xffffff;
 419       intel->polygon_offset_scale = 2.0/0xffffff; /* req'd to pass glean */
 420       intel->depth_clear_mask = 0x00ffffff;
 421       intel->stencil_clear_mask = 0xff000000;
 422       intel->ClearDepth = 0x00ffffff;
 423       break;
 424    default:
 425       assert(0);
 426       break;
 427    }
 428
 429    /* Initialize swrast, tnl driver tables: */
 430    intelInitSpanFuncs( ctx );
 431
 432    intel->no_hw = getenv("INTEL_NO_HW") != NULL;
 433
 434    if (!intel->intelScreen->irq_active) {
 435       _mesa_printf("IRQs not active.  Exiting\n");
 436       exit(1);
 437    }
 438    intelInitExtensions(ctx, GL_TRUE);
 439
 440    INTEL_DEBUG  = driParseDebugString( getenv( "INTEL_DEBUG" ),
 441                                        debug_control );
 442
 443
 444    /* Buffer manager:
 445     */
 446    intel->bm = bm_fake_intel_Attach( intel );
 447
 448
 449    bmInitPool(intel,
 450               intel->intelScreen->tex.offset, /* low offset */
 451               intel->intelScreen->tex.map, /* low virtual */
 452               intel->intelScreen->tex.size,
 453               BM_MEM_AGP);
 454
 455    /* These are still static, but create regions for them.
 456     */
 457    intel->front_region =
 458       intel_region_create_static(intel,
 459                                  BM_MEM_AGP,
 460                                  intelScreen->front.offset,
 461                                  intelScreen->front.map,
 462                                  intelScreen->cpp,
 463                                  intelScreen->front.pitch / intelScreen->cpp,
 464                                  intelScreen->height,
 465                                  intelScreen->front.size,
 466                                  intelScreen->front.tiled != 0);
 467
 468    intel->back_region =
 469       intel_region_create_static(intel,
 470                                  BM_MEM_AGP,
 471                                  intelScreen->back.offset,
 472                                  intelScreen->back.map,
 473                                  intelScreen->cpp,
 474                                  intelScreen->back.pitch / intelScreen->cpp,
 475                                  intelScreen->height,
 476                                  intelScreen->back.size,
 477                                  intelScreen->back.tiled != 0);
 478
 479    /* Still assuming front.cpp == depth.cpp
 480     *
 481     * XXX: Setting tiling to false because Depth tiling only supports
 482     * YMAJOR but the blitter only supports XMAJOR tiling.  Have to
 483     * resolve later.
 484     */
 485    intel->depth_region =
 486       intel_region_create_static(intel,
 487                                  BM_MEM_AGP,
 488                                  intelScreen->depth.offset,
 489                                  intelScreen->depth.map,
 490                                  intelScreen->cpp,
 491                                  intelScreen->depth.pitch / intelScreen->cpp,
 492                                  intelScreen->height,
 493                                  intelScreen->depth.size,
 494                                  intelScreen->depth.tiled != 0);
 495
 496    intel_bufferobj_init( intel );
 497    intel->batch = intel_batchbuffer_alloc( intel );
 498
 499    if (intel->ctx.Mesa_DXTn) {
 500       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 501       _mesa_enable_extension( ctx, "GL_S3_s3tc" );
 502    }
 503    else if (driQueryOptionb (&intelScreen->optionCache, "force_s3tc_enable")) {
 504       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 505    }
 506
 507 /*    driInitTextureObjects( ctx, & intel->swapped, */
 508 /*                        DRI_TEXMGR_DO_TEXTURE_1D | */
 509 /*                        DRI_TEXMGR_DO_TEXTURE_2D |  */
 510 /*                        DRI_TEXMGR_DO_TEXTURE_RECT ); */
 511
 512
 513    if (getenv("INTEL_NO_RAST")) {
 514       fprintf(stderr, "disabling 3D rasterization\n");
 515       intel->no_rast = 1;
 516    }
 517
 518
 519    return GL_TRUE;
 520 }
 521
 522 void intelDestroyContext(__DRIcontextPrivate *driContextPriv)
 523 {
 524    struct intel_context *intel = (struct intel_context *) driContextPriv->driverPrivate;
 525
 526    assert(intel); /* should never be null */
 527    if (intel) {
 528       GLboolean   release_texture_heaps;
 529
 530
 531       intel->vtbl.destroy( intel );
 532
 533       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 534       _swsetup_DestroyContext (&intel->ctx);
 535       _tnl_DestroyContext (&intel->ctx);
 536       _vbo_DestroyContext (&intel->ctx);
 537
 538       _swrast_DestroyContext (&intel->ctx);
 539       intel->Fallback = 0;      /* don't call _swrast_Flush later */
 540       intel_batchbuffer_free(intel->batch);
 541       intel->batch = NULL;
 542
 543
 544       if ( release_texture_heaps ) {
 545          /* This share group is about to go away, free our private
 546           * texture object data.
 547           */
 548
 549          /* XXX: destroy the shared bufmgr struct here?
 550           */
 551       }
 552
 553       /* Free the regions created to describe front/back/depth
 554        * buffers:
 555        */
 556 #if 0
 557       intel_region_release(intel, &intel->front_region);
 558       intel_region_release(intel, &intel->back_region);
 559       intel_region_release(intel, &intel->depth_region);
 560       intel_region_release(intel, &intel->draw_region);
 561 #endif
 562
 563       /* free the Mesa context */
 564       intel->ctx.VertexProgram.Current = NULL;
 565       intel->ctx.FragmentProgram.Current = NULL;
 566       _mesa_destroy_context(&intel->ctx);
 567    }
 568
 569    driContextPriv->driverPrivate = NULL;
 570 }
 571
 572 GLboolean intelUnbindContext(__DRIcontextPrivate *driContextPriv)
 573 {
 574    return GL_TRUE;
 575 }
 576
 577 GLboolean intelMakeCurrent(__DRIcontextPrivate *driContextPriv,
 578                           __DRIdrawablePrivate *driDrawPriv,
 579                           __DRIdrawablePrivate *driReadPriv)
 580 {
 581
 582    if (driContextPriv) {
 583       struct intel_context *intel = (struct intel_context *) driContextPriv->driverPrivate;
 584
 585       if ( intel->driDrawable != driDrawPriv ) {
 586          /* Shouldn't the readbuffer be stored also? */
 587          driDrawableInitVBlank( driDrawPriv, intel->vblank_flags,
 588                       &intel->vbl_seq );
 589
 590          intel->driDrawable = driDrawPriv;
 591          intelWindowMoved( intel );
 592       }
 593
 594       _mesa_make_current(&intel->ctx,
 595                          (GLframebuffer *) driDrawPriv->driverPrivate,
 596                          (GLframebuffer *) driReadPriv->driverPrivate);
 597
 598       intel->ctx.Driver.DrawBuffer( &intel->ctx, intel->ctx.Color.DrawBuffer[0] );
 599    } else {
 600       _mesa_make_current(NULL, NULL, NULL);
 601    }
 602
 603    return GL_TRUE;
 604 }
 605
 606
 607 static void intelContendedLock( struct intel_context *intel, GLuint flags )
 608 {
 609    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 610    __DRIscreenPrivate *sPriv = intel->driScreen;
 611    volatile drmI830Sarea * sarea = intel->sarea;
 612    int me = intel->hHWContext;
 613    int my_bufmgr = bmCtxId(intel);
 614
 615    drmGetLock(intel->driFd, intel->hHWContext, flags);
 616
 617    /* If the window moved, may need to set a new cliprect now.
 618     *
 619     * NOTE: This releases and regains the hw lock, so all state
 620     * checking must be done *after* this call:
 621     */
 622    if (dPriv)
 623       DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 624
 625
 626    intel->locked = 1;
 627    intel->need_flush = 1;
 628
 629    /* Lost context?
 630     */
 631    if (sarea->ctxOwner != me) {
 632       DBG("Lost Context: sarea->ctxOwner %x me %x\n", sarea->ctxOwner, me);
 633       sarea->ctxOwner = me;
 634       intel->vtbl.lost_hardware( intel );
 635    }
 636
 637    /* As above, but don't evict the texture data on transitions
 638     * between contexts which all share a local buffer manager.
 639     */
 640    if (sarea->texAge != my_bufmgr) {
 641       DBG("Lost Textures: sarea->texAge %x my_bufmgr %x\n", sarea->ctxOwner, my_bufmgr);
 642       sarea->texAge = my_bufmgr;
 643       bm_fake_NotifyContendedLockTake( intel );
 644    }
 645
 646    /* Drawable changed?
 647     */
 648    if (dPriv && intel->lastStamp != dPriv->lastStamp) {
 649       intelWindowMoved( intel );
 650       intel->lastStamp = dPriv->lastStamp;
 651    }
 652 }
 653
 654 _glthread_DECLARE_STATIC_MUTEX(lockMutex);
 655
 656 /* Lock the hardware and validate our state.
 657  */
 658 void LOCK_HARDWARE( struct intel_context *intel )
 659 {
 660     char __ret=0;
 661
 662     _glthread_LOCK_MUTEX(lockMutex);
 663     assert(!intel->locked);
 664
 665
 666     DRM_CAS(intel->driHwLock, intel->hHWContext,
 667             (DRM_LOCK_HELD|intel->hHWContext), __ret);
 668     if (__ret)
 669         intelContendedLock( intel, 0 );
 670
 671    intel->locked = 1;
 672
 673    if (intel->aub_wrap) {
 674       bm_fake_NotifyContendedLockTake( intel );
 675       intel->vtbl.lost_hardware( intel );
 676       intel->vtbl.aub_wrap(intel);
 677       intel->aub_wrap = 0;
 678    }
 679
 680    if (bmError(intel)) {
 681       bmEvictAll(intel);
 682       intel->vtbl.lost_hardware( intel );
 683    }
 684
 685    /* Make sure nothing has been emitted prior to getting the lock:
 686     */
 687    assert(intel->batch->map == 0);
 688
 689    /* XXX: postpone, may not be needed:
 690     */
 691    if (!intel_batchbuffer_map(intel->batch)) {
 692       bmEvictAll(intel);
 693       intel->vtbl.lost_hardware( intel );
 694
 695       /* This could only fail if the batchbuffer was greater in size
 696        * than the available texture memory:
 697        */
 698       if (!intel_batchbuffer_map(intel->batch)) {
 699          _mesa_printf("double failure to map batchbuffer\n");
 700          assert(0);
 701       }
 702    }
 703 }
 704
 705
 706 /* Unlock the hardware using the global current context
 707  */
 708 void UNLOCK_HARDWARE( struct intel_context *intel )
 709 {
 710    /* Make sure everything has been released:
 711     */
 712    assert(intel->batch->ptr == intel->batch->map + intel->batch->offset);
 713
 714    intel_batchbuffer_unmap(intel->batch);
 715    intel->vtbl.note_unlock( intel );
 716    intel->locked = 0;
 717
 718
 719
 720    DRM_UNLOCK(intel->driFd, intel->driHwLock, intel->hHWContext);
 721    _glthread_UNLOCK_MUTEX(lockMutex);
 722 }
 723
 724