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