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