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_VERSION_2_1
  86 #define need_GL_ARB_shader_objects
  87 #define need_GL_ARB_vertex_shader
  88
  89 #include "extension_helper.h"
  90
  91 #ifndef VERBOSE
  92 int VERBOSE = 0;
  93 #endif
  94
  95 /***************************************
  96  * Mesa's Driver Functions
  97  ***************************************/
  98
  99 #define DRIVER_VERSION                     "4.1.3002"
 100
 101 static const GLubyte *intelGetString( GLcontext *ctx, GLenum name )
 102 {
 103    const char * chipset;
 104    static char buffer[128];
 105
 106    switch (name) {
 107    case GL_VENDOR:
 108       return (GLubyte *)"Tungsten Graphics, Inc";
 109       break;
 110
 111    case GL_RENDERER:
 112       switch (intel_context(ctx)->intelScreen->deviceID) {
 113       case PCI_CHIP_I965_Q:
 114          chipset = "Intel(R) 965Q";
 115          break;
 116       case PCI_CHIP_I965_G:
 117       case PCI_CHIP_I965_G_1:
 118          chipset = "Intel(R) 965G";
 119          break;
 120       case PCI_CHIP_I946_GZ:
 121          chipset = "Intel(R) 946GZ";
 122          break;
 123       case PCI_CHIP_I965_GM:
 124          chipset = "Intel(R) 965GM";
 125          break;
 126       case PCI_CHIP_I965_GME:
 127          chipset = "Intel(R) 965GME/GLE";
 128          break;
 129       default:
 130          chipset = "Unknown Intel Chipset";
 131       }
 132
 133       (void) driGetRendererString( buffer, chipset, DRIVER_VERSION, 0 );
 134       return (GLubyte *) buffer;
 135
 136    default:
 137       return NULL;
 138    }
 139 }
 140
 141
 142 /**
 143  * Extension strings exported by the intel driver.
 144  *
 145  * \note
 146  * It appears that ARB_texture_env_crossbar has "disappeared" compared to the
 147  * old i830-specific driver.
 148  */
 149 const struct dri_extension card_extensions[] =
 150 {
 151     { "GL_ARB_multisample",                GL_ARB_multisample_functions },
 152     { "GL_ARB_multitexture",               NULL },
 153     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 154     { "GL_ARB_texture_border_clamp",       NULL },
 155     { "GL_ARB_texture_compression",        GL_ARB_texture_compression_functions },
 156     { "GL_ARB_texture_cube_map",           NULL },
 157     { "GL_ARB_texture_env_add",            NULL },
 158     { "GL_ARB_texture_env_combine",        NULL },
 159     { "GL_ARB_texture_env_dot3",           NULL },
 160     { "GL_ARB_texture_mirrored_repeat",    NULL },
 161     { "GL_ARB_texture_non_power_of_two",   NULL },
 162     { "GL_ARB_texture_rectangle",          NULL },
 163     { "GL_NV_texture_rectangle",           NULL },
 164     { "GL_EXT_texture_rectangle",          NULL },
 165     { "GL_ARB_texture_rectangle",          NULL },
 166     { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
 167     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions },
 168     { "GL_ARB_window_pos",                 GL_ARB_window_pos_functions },
 169     { "GL_EXT_blend_color",                GL_EXT_blend_color_functions },
 170     { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
 171     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
 172     { "GL_EXT_blend_minmax",               GL_EXT_blend_minmax_functions },
 173     { "GL_EXT_blend_logic_op",             NULL },
 174     { "GL_EXT_blend_subtract",             NULL },
 175     { "GL_EXT_cull_vertex",                GL_EXT_cull_vertex_functions },
 176     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
 177     { "GL_EXT_multi_draw_arrays",          GL_EXT_multi_draw_arrays_functions },
 178     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 179     { "GL_EXT_stencil_wrap",               NULL },
 180     { "GL_EXT_texture_edge_clamp",         NULL },
 181     { "GL_EXT_texture_env_combine",        NULL },
 182     { "GL_EXT_texture_env_dot3",           NULL },
 183     { "GL_EXT_texture_filter_anisotropic", NULL },
 184     { "GL_EXT_texture_lod_bias",           NULL },
 185     { "GL_3DFX_texture_compression_FXT1",  NULL },
 186     { "GL_APPLE_client_storage",           NULL },
 187     { "GL_MESA_pack_invert",               NULL },
 188     { "GL_MESA_ycbcr_texture",             NULL },
 189     { "GL_NV_blend_square",                NULL },
 190     { "GL_SGIS_generate_mipmap",           NULL },
 191     { "GL_ARB_shading_language_100",       GL_VERSION_2_0_functions},
 192     { "GL_ARB_shading_language_120",       GL_VERSION_2_1_functions},
 193     { "GL_ARB_shader_objects",             GL_ARB_shader_objects_functions},
 194     { "GL_ARB_vertex_shader",              GL_ARB_vertex_shader_functions},
 195     { "GL_ARB_fragment_shader",            NULL },
 196     /* XXX not implement yet, to compile builtin glsl lib */
 197     { "GL_ARB_draw_buffers",               NULL },
 198     { NULL,                                NULL }
 199 };
 200
 201 const struct dri_extension arb_oc_extension =
 202     { "GL_ARB_occlusion_query",            GL_ARB_occlusion_query_functions};
 203
 204 void intelInitExtensions(GLcontext *ctx, GLboolean enable_imaging)
 205 {
 206         struct intel_context *intel = ctx?intel_context(ctx):NULL;
 207         driInitExtensions(ctx, card_extensions, enable_imaging);
 208         if (!ctx || intel->intelScreen->drmMinor >= 8)
 209                 driInitSingleExtension (ctx, &arb_oc_extension);
 210 }
 211
 212 static const struct dri_debug_control debug_control[] =
 213 {
 214     { "fall",  DEBUG_FALLBACKS },
 215     { "tex",   DEBUG_TEXTURE },
 216     { "ioctl", DEBUG_IOCTL },
 217     { "prim",  DEBUG_PRIMS },
 218     { "vert",  DEBUG_VERTS },
 219     { "state", DEBUG_STATE },
 220     { "verb",  DEBUG_VERBOSE },
 221     { "dri",   DEBUG_DRI },
 222     { "dma",   DEBUG_DMA },
 223     { "san",   DEBUG_SANITY },
 224     { "sync",  DEBUG_SYNC },
 225     { "sleep", DEBUG_SLEEP },
 226     { "pix",   DEBUG_PIXEL },
 227     { "buf",   DEBUG_BUFMGR },
 228     { "stats", DEBUG_STATS },
 229     { "tile",  DEBUG_TILE },
 230     { "sing",  DEBUG_SINGLE_THREAD },
 231     { "thre",  DEBUG_SINGLE_THREAD },
 232     { "wm",    DEBUG_WM },
 233     { "vs",    DEBUG_VS },
 234     { NULL,    0 }
 235 };
 236
 237
 238 static void intelInvalidateState( GLcontext *ctx, GLuint new_state )
 239 {
 240    struct intel_context *intel = intel_context(ctx);
 241
 242    _swrast_InvalidateState( ctx, new_state );
 243    _swsetup_InvalidateState( ctx, new_state );
 244    _vbo_InvalidateState( ctx, new_state );
 245    _tnl_InvalidateState( ctx, new_state );
 246    _tnl_invalidate_vertex_state( ctx, new_state );
 247
 248    intel->NewGLState |= new_state;
 249
 250    if (intel->vtbl.invalidate_state)
 251       intel->vtbl.invalidate_state( intel, new_state );
 252 }
 253
 254
 255 void intelFlush( GLcontext *ctx )
 256 {
 257    struct intel_context *intel = intel_context( ctx );
 258
 259    bmLockAndFence(intel);
 260 }
 261
 262 void intelFinish( GLcontext *ctx )
 263 {
 264    struct intel_context *intel = intel_context( ctx );
 265
 266    bmFinishFence(intel, bmLockAndFence(intel));
 267 }
 268
 269 static void
 270 intelBeginQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
 271 {
 272         struct intel_context *intel = intel_context( ctx );
 273         drmI830MMIO io = {
 274                 .read_write = MMIO_READ,
 275                 .reg = MMIO_REGS_PS_DEPTH_COUNT,
 276                 .data = &q->Result
 277         };
 278         intel->stats_wm++;
 279         intelFinish(&intel->ctx);
 280         drmCommandRead(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
 281 }
 282
 283 static void
 284 intelEndQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
 285 {
 286         struct intel_context *intel = intel_context( ctx );
 287         GLuint64EXT tmp;
 288         drmI830MMIO io = {
 289                 .read_write = MMIO_READ,
 290                 .reg = MMIO_REGS_PS_DEPTH_COUNT,
 291                 .data = &tmp
 292         };
 293         intelFinish(&intel->ctx);
 294         drmCommandRead(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
 295         q->Result = tmp - q->Result;
 296         q->Ready = GL_TRUE;
 297         intel->stats_wm--;
 298 }
 299
 300
 301 void intelInitDriverFunctions( struct dd_function_table *functions )
 302 {
 303    _mesa_init_driver_functions( functions );
 304
 305    functions->Flush = intelFlush;
 306    functions->Finish = intelFinish;
 307    functions->GetString = intelGetString;
 308    functions->UpdateState = intelInvalidateState;
 309    functions->BeginQuery = intelBeginQuery;
 310    functions->EndQuery = intelEndQuery;
 311
 312    /* CopyPixels can be accelerated even with the current memory
 313     * manager:
 314     */
 315    if (!getenv("INTEL_NO_BLIT")) {
 316       functions->CopyPixels = intelCopyPixels;
 317       functions->Bitmap = intelBitmap;
 318    }
 319
 320    intelInitTextureFuncs( functions );
 321    intelInitStateFuncs( functions );
 322    intelInitBufferFuncs( functions );
 323 }
 324
 325
 326
 327 GLboolean intelInitContext( struct intel_context *intel,
 328                             const __GLcontextModes *mesaVis,
 329                             __DRIcontextPrivate *driContextPriv,
 330                             void *sharedContextPrivate,
 331                             struct dd_function_table *functions )
 332 {
 333    GLcontext *ctx = &intel->ctx;
 334    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 335    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 336    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 337    volatile drmI830Sarea *saPriv = (volatile drmI830Sarea *)
 338       (((GLubyte *)sPriv->pSAREA)+intelScreen->sarea_priv_offset);
 339
 340    if (!_mesa_initialize_context(&intel->ctx,
 341                                  mesaVis, shareCtx,
 342                                  functions,
 343                                  (void*) intel)) {
 344       _mesa_printf("%s: failed to init mesa context\n", __FUNCTION__);
 345       return GL_FALSE;
 346    }
 347
 348    driContextPriv->driverPrivate = intel;
 349    intel->intelScreen = intelScreen;
 350    intel->driScreen = sPriv;
 351    intel->sarea = saPriv;
 352
 353    driParseConfigFiles (&intel->optionCache, &intelScreen->optionCache,
 354                    intel->driScreen->myNum, "i965");
 355
 356    intel->vblank_flags = (intel->intelScreen->irq_active != 0)
 357            ? driGetDefaultVBlankFlags(&intel->optionCache) : VBLANK_FLAG_NO_IRQ;
 358
 359    ctx->Const.MaxTextureMaxAnisotropy = 2.0;
 360
 361    if (getenv("INTEL_STRICT_CONFORMANCE")) {
 362       intel->strict_conformance = 1;
 363    }
 364
 365    if (intel->strict_conformance) {
 366       ctx->Const.MinLineWidth = 1.0;
 367       ctx->Const.MinLineWidthAA = 1.0;
 368       ctx->Const.MaxLineWidth = 1.0;
 369       ctx->Const.MaxLineWidthAA = 1.0;
 370       ctx->Const.LineWidthGranularity = 1.0;
 371    }
 372    else {
 373       ctx->Const.MinLineWidth = 1.0;
 374       ctx->Const.MinLineWidthAA = 1.0;
 375       ctx->Const.MaxLineWidth = 5.0;
 376       ctx->Const.MaxLineWidthAA = 5.0;
 377       ctx->Const.LineWidthGranularity = 0.5;
 378    }
 379
 380    ctx->Const.MinPointSize = 1.0;
 381    ctx->Const.MinPointSizeAA = 1.0;
 382    ctx->Const.MaxPointSize = 255.0;
 383    ctx->Const.MaxPointSizeAA = 3.0;
 384    ctx->Const.PointSizeGranularity = 1.0;
 385
 386    /* reinitialize the context point state.
 387     * It depend on constants in __GLcontextRec::Const
 388     */
 389    _mesa_init_point(ctx);
 390
 391    /* Initialize the software rasterizer and helper modules. */
 392    _swrast_CreateContext( ctx );
 393    _vbo_CreateContext( ctx );
 394    _tnl_CreateContext( ctx );
 395    _swsetup_CreateContext( ctx );
 396
 397    TNL_CONTEXT(ctx)->Driver.RunPipeline = _tnl_run_pipeline;
 398
 399    /* Configure swrast to match hardware characteristics: */
 400    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 401    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 402
 403    /* Dri stuff */
 404    intel->hHWContext = driContextPriv->hHWContext;
 405    intel->driFd = sPriv->fd;
 406    intel->driHwLock = (drmLock *) &sPriv->pSAREA->lock;
 407
 408    intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 409    intel->hw_stipple = 1;
 410
 411    switch(mesaVis->depthBits) {
 412    case 0:                      /* what to do in this case? */
 413    case 16:
 414       intel->depth_scale = 1.0/0xffff;
 415       intel->polygon_offset_scale = 1.0/0xffff;
 416       intel->depth_clear_mask = ~0;
 417       intel->ClearDepth = 0xffff;
 418       break;
 419    case 24:
 420       intel->depth_scale = 1.0/0xffffff;
 421       intel->polygon_offset_scale = 2.0/0xffffff; /* req'd to pass glean */
 422       intel->depth_clear_mask = 0x00ffffff;
 423       intel->stencil_clear_mask = 0xff000000;
 424       intel->ClearDepth = 0x00ffffff;
 425       break;
 426    default:
 427       assert(0);
 428       break;
 429    }
 430
 431    /* Initialize swrast, tnl driver tables: */
 432    intelInitSpanFuncs( ctx );
 433
 434    intel->no_hw = getenv("INTEL_NO_HW") != NULL;
 435
 436    if (!intel->intelScreen->irq_active) {
 437       _mesa_printf("IRQs not active.  Exiting\n");
 438       exit(1);
 439    }
 440    intelInitExtensions(ctx, GL_TRUE);
 441
 442    INTEL_DEBUG  = driParseDebugString( getenv( "INTEL_DEBUG" ),
 443                                        debug_control );
 444
 445
 446    /* Buffer manager:
 447     */
 448    intel->bm = bm_fake_intel_Attach( intel );
 449
 450
 451    bmInitPool(intel,
 452               intel->intelScreen->tex.offset, /* low offset */
 453               intel->intelScreen->tex.map, /* low virtual */
 454               intel->intelScreen->tex.size,
 455               BM_MEM_AGP);
 456
 457    /* These are still static, but create regions for them.
 458     */
 459    intel->front_region =
 460       intel_region_create_static(intel,
 461                                  BM_MEM_AGP,
 462                                  intelScreen->front.offset,
 463                                  intelScreen->front.map,
 464                                  intelScreen->cpp,
 465                                  intelScreen->front.pitch / intelScreen->cpp,
 466                                  intelScreen->height,
 467                                  intelScreen->front.size,
 468                                  intelScreen->front.tiled != 0);
 469
 470    intel->back_region =
 471       intel_region_create_static(intel,
 472                                  BM_MEM_AGP,
 473                                  intelScreen->back.offset,
 474                                  intelScreen->back.map,
 475                                  intelScreen->cpp,
 476                                  intelScreen->back.pitch / intelScreen->cpp,
 477                                  intelScreen->height,
 478                                  intelScreen->back.size,
 479                                  intelScreen->back.tiled != 0);
 480
 481    /* Still assuming front.cpp == depth.cpp
 482     *
 483     * XXX: Setting tiling to false because Depth tiling only supports
 484     * YMAJOR but the blitter only supports XMAJOR tiling.  Have to
 485     * resolve later.
 486     */
 487    intel->depth_region =
 488       intel_region_create_static(intel,
 489                                  BM_MEM_AGP,
 490                                  intelScreen->depth.offset,
 491                                  intelScreen->depth.map,
 492                                  intelScreen->cpp,
 493                                  intelScreen->depth.pitch / intelScreen->cpp,
 494                                  intelScreen->height,
 495                                  intelScreen->depth.size,
 496                                  intelScreen->depth.tiled != 0);
 497
 498    intel_bufferobj_init( intel );
 499    intel->batch = intel_batchbuffer_alloc( intel );
 500
 501    if (intel->ctx.Mesa_DXTn) {
 502       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 503       _mesa_enable_extension( ctx, "GL_S3_s3tc" );
 504    }
 505    else if (driQueryOptionb (&intelScreen->optionCache, "force_s3tc_enable")) {
 506       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 507    }
 508
 509 /*    driInitTextureObjects( ctx, & intel->swapped, */
 510 /*                        DRI_TEXMGR_DO_TEXTURE_1D | */
 511 /*                        DRI_TEXMGR_DO_TEXTURE_2D |  */
 512 /*                        DRI_TEXMGR_DO_TEXTURE_RECT ); */
 513
 514
 515    if (getenv("INTEL_NO_RAST")) {
 516       fprintf(stderr, "disabling 3D rasterization\n");
 517       intel->no_rast = 1;
 518    }
 519
 520
 521    return GL_TRUE;
 522 }
 523
 524 void intelDestroyContext(__DRIcontextPrivate *driContextPriv)
 525 {
 526    struct intel_context *intel = (struct intel_context *) driContextPriv->driverPrivate;
 527
 528    assert(intel); /* should never be null */
 529    if (intel) {
 530       GLboolean   release_texture_heaps;
 531
 532
 533       intel->vtbl.destroy( intel );
 534
 535       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 536       _swsetup_DestroyContext (&intel->ctx);
 537       _tnl_DestroyContext (&intel->ctx);
 538       _vbo_DestroyContext (&intel->ctx);
 539
 540       _swrast_DestroyContext (&intel->ctx);
 541       intel->Fallback = 0;      /* don't call _swrast_Flush later */
 542       intel_batchbuffer_free(intel->batch);
 543       intel->batch = NULL;
 544
 545
 546       if ( release_texture_heaps ) {
 547          /* This share group is about to go away, free our private
 548           * texture object data.
 549           */
 550
 551          /* XXX: destroy the shared bufmgr struct here?
 552           */
 553       }
 554
 555       /* Free the regions created to describe front/back/depth
 556        * buffers:
 557        */
 558 #if 0
 559       intel_region_release(intel, &intel->front_region);
 560       intel_region_release(intel, &intel->back_region);
 561       intel_region_release(intel, &intel->depth_region);
 562       intel_region_release(intel, &intel->draw_region);
 563 #endif
 564
 565       /* free the Mesa context */
 566       intel->ctx.VertexProgram.Current = NULL;
 567       intel->ctx.FragmentProgram.Current = NULL;
 568       _mesa_destroy_context(&intel->ctx);
 569    }
 570
 571    driContextPriv->driverPrivate = NULL;
 572 }
 573
 574 GLboolean intelUnbindContext(__DRIcontextPrivate *driContextPriv)
 575 {
 576    return GL_TRUE;
 577 }
 578
 579 GLboolean intelMakeCurrent(__DRIcontextPrivate *driContextPriv,
 580                           __DRIdrawablePrivate *driDrawPriv,
 581                           __DRIdrawablePrivate *driReadPriv)
 582 {
 583
 584    if (driContextPriv) {
 585       struct intel_context *intel = (struct intel_context *) driContextPriv->driverPrivate;
 586
 587       if ( intel->driDrawable != driDrawPriv ) {
 588          /* Shouldn't the readbuffer be stored also? */
 589          driDrawableInitVBlank( driDrawPriv, intel->vblank_flags,
 590                       &intel->vbl_seq );
 591
 592          intel->driDrawable = driDrawPriv;
 593          intelWindowMoved( intel );
 594       }
 595
 596       _mesa_make_current(&intel->ctx,
 597                          (GLframebuffer *) driDrawPriv->driverPrivate,
 598                          (GLframebuffer *) driReadPriv->driverPrivate);
 599
 600       intel->ctx.Driver.DrawBuffer( &intel->ctx, intel->ctx.Color.DrawBuffer[0] );
 601    } else {
 602       _mesa_make_current(NULL, NULL, NULL);
 603    }
 604
 605    return GL_TRUE;
 606 }
 607
 608
 609 static void intelContendedLock( struct intel_context *intel, GLuint flags )
 610 {
 611    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 612    __DRIscreenPrivate *sPriv = intel->driScreen;
 613    volatile drmI830Sarea * sarea = intel->sarea;
 614    int me = intel->hHWContext;
 615    int my_bufmgr = bmCtxId(intel);
 616
 617    drmGetLock(intel->driFd, intel->hHWContext, flags);
 618
 619    /* If the window moved, may need to set a new cliprect now.
 620     *
 621     * NOTE: This releases and regains the hw lock, so all state
 622     * checking must be done *after* this call:
 623     */
 624    if (dPriv)
 625       DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 626
 627
 628    intel->locked = 1;
 629    intel->need_flush = 1;
 630
 631    /* Lost context?
 632     */
 633    if (sarea->ctxOwner != me) {
 634       DBG("Lost Context: sarea->ctxOwner %x me %x\n", sarea->ctxOwner, me);
 635       sarea->ctxOwner = me;
 636       intel->vtbl.lost_hardware( intel );
 637    }
 638
 639    /* As above, but don't evict the texture data on transitions
 640     * between contexts which all share a local buffer manager.
 641     */
 642    if (sarea->texAge != my_bufmgr) {
 643       DBG("Lost Textures: sarea->texAge %x my_bufmgr %x\n", sarea->ctxOwner, my_bufmgr);
 644       sarea->texAge = my_bufmgr;
 645       bm_fake_NotifyContendedLockTake( intel );
 646    }
 647
 648    /* Drawable changed?
 649     */
 650    if (dPriv && intel->lastStamp != dPriv->lastStamp) {
 651       intelWindowMoved( intel );
 652       intel->lastStamp = dPriv->lastStamp;
 653    }
 654 }
 655
 656 _glthread_DECLARE_STATIC_MUTEX(lockMutex);
 657
 658 /* Lock the hardware and validate our state.
 659  */
 660 void LOCK_HARDWARE( struct intel_context *intel )
 661 {
 662     char __ret=0;
 663
 664     _glthread_LOCK_MUTEX(lockMutex);
 665     assert(!intel->locked);
 666
 667
 668     DRM_CAS(intel->driHwLock, intel->hHWContext,
 669             (DRM_LOCK_HELD|intel->hHWContext), __ret);
 670     if (__ret)
 671         intelContendedLock( intel, 0 );
 672
 673    intel->locked = 1;
 674
 675    if (intel->aub_wrap) {
 676       bm_fake_NotifyContendedLockTake( intel );
 677       intel->vtbl.lost_hardware( intel );
 678       intel->vtbl.aub_wrap(intel);
 679       intel->aub_wrap = 0;
 680    }
 681
 682    if (bmError(intel)) {
 683       bmEvictAll(intel);
 684       intel->vtbl.lost_hardware( intel );
 685    }
 686
 687    /* Make sure nothing has been emitted prior to getting the lock:
 688     */
 689    assert(intel->batch->map == 0);
 690
 691    /* XXX: postpone, may not be needed:
 692     */
 693    if (!intel_batchbuffer_map(intel->batch)) {
 694       bmEvictAll(intel);
 695       intel->vtbl.lost_hardware( intel );
 696
 697       /* This could only fail if the batchbuffer was greater in size
 698        * than the available texture memory:
 699        */
 700       if (!intel_batchbuffer_map(intel->batch)) {
 701          _mesa_printf("double failure to map batchbuffer\n");
 702          assert(0);
 703       }
 704    }
 705 }
 706
 707
 708 /* Unlock the hardware using the global current context
 709  */
 710 void UNLOCK_HARDWARE( struct intel_context *intel )
 711 {
 712    /* Make sure everything has been released:
 713     */
 714    assert(intel->batch->ptr == intel->batch->map + intel->batch->offset);
 715
 716    intel_batchbuffer_unmap(intel->batch);
 717    intel->vtbl.note_unlock( intel );
 718    intel->locked = 0;
 719
 720
 721
 722    DRM_UNLOCK(intel->driFd, intel->driHwLock, intel->hHWContext);
 723    _glthread_UNLOCK_MUTEX(lockMutex);
 724 }
 725
 726