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 #include "intel_chipset.h"
  50
  51 #include "i830_dri.h"
  52 #include "i830_common.h"
  53
  54 #include "intel_tex.h"
  55 #include "intel_span.h"
  56 #include "intel_ioctl.h"
  57 #include "intel_batchbuffer.h"
  58 #include "intel_blit.h"
  59 #include "intel_regions.h"
  60 #include "intel_buffer_objects.h"
  61 #include "intel_decode.h"
  62 #include "intel_bufmgr_ttm.h"
  63
  64 #include "i915_drm.h"
  65
  66 #include "utils.h"
  67 #include "vblank.h"
  68 #ifndef INTEL_DEBUG
  69 int INTEL_DEBUG = (0);
  70 #endif
  71
  72 #define need_GL_NV_point_sprite
  73 #define need_GL_ARB_multisample
  74 #define need_GL_ARB_point_parameters
  75 #define need_GL_ARB_texture_compression
  76 #define need_GL_ARB_vertex_buffer_object
  77 #define need_GL_ARB_vertex_program
  78 #define need_GL_ARB_window_pos
  79 #define need_GL_ARB_occlusion_query
  80 #define need_GL_EXT_blend_color
  81 #define need_GL_EXT_blend_equation_separate
  82 #define need_GL_EXT_blend_func_separate
  83 #define need_GL_EXT_blend_minmax
  84 #define need_GL_EXT_cull_vertex
  85 #define need_GL_EXT_fog_coord
  86 #define need_GL_EXT_multi_draw_arrays
  87 #define need_GL_EXT_secondary_color
  88 #define need_GL_EXT_point_parameters
  89 #define need_GL_VERSION_2_0
  90 #define need_GL_VERSION_2_1
  91 #define need_GL_ARB_shader_objects
  92 #define need_GL_ARB_vertex_shader
  93
  94 #include "extension_helper.h"
  95
  96 #ifndef VERBOSE
  97 int VERBOSE = 0;
  98 #endif
  99
 100 /***************************************
 101  * Mesa's Driver Functions
 102  ***************************************/
 103
 104 #define DRIVER_VERSION                     "4.1.3002"
 105
 106 static const GLubyte *intelGetString( GLcontext *ctx, GLenum name )
 107 {
 108    const char * chipset;
 109    static char buffer[128];
 110
 111    switch (name) {
 112    case GL_VENDOR:
 113       return (GLubyte *)"Tungsten Graphics, Inc";
 114       break;
 115
 116    case GL_RENDERER:
 117       switch (intel_context(ctx)->intelScreen->deviceID) {
 118       case PCI_CHIP_I965_Q:
 119          chipset = "Intel(R) 965Q";
 120          break;
 121       case PCI_CHIP_I965_G:
 122       case PCI_CHIP_I965_G_1:
 123          chipset = "Intel(R) 965G";
 124          break;
 125       case PCI_CHIP_I946_GZ:
 126          chipset = "Intel(R) 946GZ";
 127          break;
 128       case PCI_CHIP_I965_GM:
 129          chipset = "Intel(R) 965GM";
 130          break;
 131       case PCI_CHIP_I965_GME:
 132          chipset = "Intel(R) 965GME/GLE";
 133          break;
 134       default:
 135          chipset = "Unknown Intel Chipset";
 136       }
 137
 138       (void) driGetRendererString( buffer, chipset, DRIVER_VERSION, 0 );
 139       return (GLubyte *) buffer;
 140
 141    default:
 142       return NULL;
 143    }
 144 }
 145
 146
 147 /**
 148  * Extension strings exported by the intel driver.
 149  *
 150  * \note
 151  * It appears that ARB_texture_env_crossbar has "disappeared" compared to the
 152  * old i830-specific driver.
 153  */
 154 const struct dri_extension card_extensions[] =
 155 {
 156     { "GL_ARB_multisample",                GL_ARB_multisample_functions },
 157     { "GL_ARB_multitexture",               NULL },
 158     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 159     { "GL_NV_point_sprite",                GL_NV_point_sprite_functions },
 160     { "GL_ARB_texture_border_clamp",       NULL },
 161     { "GL_ARB_texture_compression",        GL_ARB_texture_compression_functions },
 162     { "GL_ARB_texture_cube_map",           NULL },
 163     { "GL_ARB_texture_env_add",            NULL },
 164     { "GL_ARB_texture_env_combine",        NULL },
 165     { "GL_ARB_texture_env_dot3",           NULL },
 166     { "GL_ARB_texture_mirrored_repeat",    NULL },
 167     { "GL_ARB_texture_non_power_of_two",   NULL },
 168     { "GL_ARB_texture_rectangle",          NULL },
 169     { "GL_NV_texture_rectangle",           NULL },
 170     { "GL_EXT_texture_rectangle",          NULL },
 171     { "GL_ARB_texture_rectangle",          NULL },
 172     { "GL_ARB_point_sprite",               NULL},
 173     { "GL_ARB_point_parameters",           NULL },
 174     { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
 175     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions },
 176     { "GL_ARB_window_pos",                 GL_ARB_window_pos_functions },
 177     { "GL_EXT_blend_color",                GL_EXT_blend_color_functions },
 178     { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
 179     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
 180     { "GL_EXT_blend_minmax",               GL_EXT_blend_minmax_functions },
 181     { "GL_EXT_blend_logic_op",             NULL },
 182     { "GL_EXT_blend_subtract",             NULL },
 183     { "GL_EXT_cull_vertex",                GL_EXT_cull_vertex_functions },
 184     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
 185     { "GL_EXT_multi_draw_arrays",          GL_EXT_multi_draw_arrays_functions },
 186     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 187     { "GL_EXT_stencil_wrap",               NULL },
 188     { "GL_EXT_texture_edge_clamp",         NULL },
 189     { "GL_EXT_texture_env_combine",        NULL },
 190     { "GL_EXT_texture_env_dot3",           NULL },
 191     { "GL_EXT_texture_filter_anisotropic", NULL },
 192     { "GL_EXT_texture_lod_bias",           NULL },
 193     { "GL_EXT_texture_sRGB",               NULL },
 194     { "GL_3DFX_texture_compression_FXT1",  NULL },
 195     { "GL_APPLE_client_storage",           NULL },
 196     { "GL_MESA_pack_invert",               NULL },
 197     { "GL_MESA_ycbcr_texture",             NULL },
 198     { "GL_NV_blend_square",                NULL },
 199     { "GL_SGIS_generate_mipmap",           NULL },
 200     { "GL_ARB_shading_language_100",       GL_VERSION_2_0_functions},
 201     { "GL_ARB_shading_language_120",       GL_VERSION_2_1_functions},
 202     { "GL_ARB_shader_objects",             GL_ARB_shader_objects_functions},
 203     { "GL_ARB_vertex_shader",              GL_ARB_vertex_shader_functions},
 204     { "GL_ARB_fragment_shader",            NULL },
 205     /* XXX not implement yet, to compile builtin glsl lib */
 206     { "GL_ARB_draw_buffers",               NULL },
 207     { NULL,                                NULL }
 208 };
 209
 210 const struct dri_extension arb_oc_extension =
 211     { "GL_ARB_occlusion_query",            GL_ARB_occlusion_query_functions};
 212
 213 void intelInitExtensions(GLcontext *ctx, GLboolean enable_imaging)
 214 {
 215         struct intel_context *intel = ctx?intel_context(ctx):NULL;
 216         driInitExtensions(ctx, card_extensions, enable_imaging);
 217         if (!ctx || intel->intelScreen->drmMinor >= 8)
 218                 driInitSingleExtension (ctx, &arb_oc_extension);
 219 }
 220
 221 static const struct dri_debug_control debug_control[] =
 222 {
 223     { "fall",  DEBUG_FALLBACKS },
 224     { "tex",   DEBUG_TEXTURE },
 225     { "ioctl", DEBUG_IOCTL },
 226     { "prim",  DEBUG_PRIMS },
 227     { "vert",  DEBUG_VERTS },
 228     { "state", DEBUG_STATE },
 229     { "verb",  DEBUG_VERBOSE },
 230     { "dri",   DEBUG_DRI },
 231     { "dma",   DEBUG_DMA },
 232     { "san",   DEBUG_SANITY },
 233     { "sync",  DEBUG_SYNC },
 234     { "sleep", DEBUG_SLEEP },
 235     { "pix",   DEBUG_PIXEL },
 236     { "buf",   DEBUG_BUFMGR },
 237     { "stats", DEBUG_STATS },
 238     { "tile",  DEBUG_TILE },
 239     { "sing",  DEBUG_SINGLE_THREAD },
 240     { "thre",  DEBUG_SINGLE_THREAD },
 241     { "wm",    DEBUG_WM },
 242     { "vs",    DEBUG_VS },
 243     { "bat",   DEBUG_BATCH },
 244     { "blit",  DEBUG_BLIT},
 245     { "mip",   DEBUG_MIPTREE},
 246     { "reg",   DEBUG_REGION},
 247     { NULL,    0 }
 248 };
 249
 250
 251 static void intelInvalidateState( GLcontext *ctx, GLuint new_state )
 252 {
 253    struct intel_context *intel = intel_context(ctx);
 254
 255    _swrast_InvalidateState( ctx, new_state );
 256    _swsetup_InvalidateState( ctx, new_state );
 257    _vbo_InvalidateState( ctx, new_state );
 258    _tnl_InvalidateState( ctx, new_state );
 259    _tnl_invalidate_vertex_state( ctx, new_state );
 260
 261    intel->NewGLState |= new_state;
 262
 263    if (intel->vtbl.invalidate_state)
 264       intel->vtbl.invalidate_state( intel, new_state );
 265 }
 266
 267
 268 void intelFlush( GLcontext *ctx )
 269 {
 270    struct intel_context *intel = intel_context( ctx );
 271
 272    if (intel->batch->map != intel->batch->ptr)
 273       intel_batchbuffer_flush(intel->batch);
 274 }
 275
 276 void intelFinish( GLcontext *ctx )
 277 {
 278    struct intel_context *intel = intel_context( ctx );
 279
 280    intelFlush(ctx);
 281    if (intel->batch->last_fence) {
 282       dri_fence_wait(intel->batch->last_fence);
 283       dri_fence_unreference(intel->batch->last_fence);
 284       intel->batch->last_fence = NULL;
 285    }
 286 }
 287
 288 static void
 289 intelBeginQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
 290 {
 291         struct intel_context *intel = intel_context( ctx );
 292         drmI830MMIO io = {
 293                 .read_write = MMIO_READ,
 294                 .reg = MMIO_REGS_PS_DEPTH_COUNT,
 295                 .data = &q->Result
 296         };
 297         intel->stats_wm++;
 298         intelFinish(&intel->ctx);
 299         drmCommandWrite(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
 300 }
 301
 302 static void
 303 intelEndQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
 304 {
 305         struct intel_context *intel = intel_context( ctx );
 306         GLuint64EXT tmp;
 307         drmI830MMIO io = {
 308                 .read_write = MMIO_READ,
 309                 .reg = MMIO_REGS_PS_DEPTH_COUNT,
 310                 .data = &tmp
 311         };
 312         intelFinish(&intel->ctx);
 313         drmCommandWrite(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
 314         q->Result = tmp - q->Result;
 315         q->Ready = GL_TRUE;
 316         intel->stats_wm--;
 317 }
 318
 319 /** Driver-specific fence emit implementation for the fake memory manager. */
 320 static unsigned int
 321 intel_fence_emit(void *private)
 322 {
 323    struct intel_context *intel = (struct intel_context *)private;
 324    unsigned int fence;
 325
 326    /* XXX: Need to emit a flush, if we haven't already (at least with the
 327     * current batchbuffer implementation, we have).
 328     */
 329
 330    fence = intelEmitIrqLocked(intel);
 331
 332    return fence;
 333 }
 334
 335 /** Driver-specific fence wait implementation for the fake memory manager. */
 336 static int
 337 intel_fence_wait(void *private, unsigned int cookie)
 338 {
 339    struct intel_context *intel = (struct intel_context *)private;
 340
 341    intelWaitIrq(intel, cookie);
 342
 343    return 0;
 344 }
 345
 346 static GLboolean
 347 intel_init_bufmgr(struct intel_context *intel)
 348 {
 349    intelScreenPrivate *intelScreen = intel->intelScreen;
 350    GLboolean ttm_disable = getenv("INTEL_NO_TTM") != NULL;
 351
 352    /* If we've got a new enough DDX that's initializing TTM and giving us
 353     * object handles for the shared buffers, use that.
 354     */
 355    intel->ttm = GL_FALSE;
 356    if (!ttm_disable &&
 357        intel->intelScreen->driScrnPriv->ddx_version.minor >= 9 &&
 358        intel->intelScreen->drmMinor >= 11 &&
 359        intel->intelScreen->front.bo_handle != -1)
 360    {
 361       intel->bufmgr = intel_bufmgr_ttm_init(intel->driFd,
 362                                             DRM_FENCE_TYPE_EXE,
 363                                             DRM_FENCE_TYPE_EXE |
 364                                             DRM_I915_FENCE_TYPE_RW,
 365                                             BATCH_SZ);
 366       if (intel->bufmgr != NULL)
 367          intel->ttm = GL_TRUE;
 368    }
 369    /* Otherwise, use the classic buffer manager. */
 370    if (intel->bufmgr == NULL) {
 371       if (ttm_disable) {
 372          fprintf(stderr, "TTM buffer manager disabled.  Using classic.\n");
 373       } else {
 374          fprintf(stderr, "Failed to initialize TTM buffer manager.  "
 375                  "Falling back to classic.\n");
 376       }
 377
 378       if (intelScreen->tex.size == 0) {
 379          fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 380                  __func__, __LINE__);
 381          return GL_FALSE;
 382       }
 383
 384       intel->bufmgr = dri_bufmgr_fake_init(intelScreen->tex.offset,
 385                                            intelScreen->tex.map,
 386                                            intelScreen->tex.size,
 387                                            intel_fence_emit,
 388                                            intel_fence_wait,
 389                                            intel);
 390    }
 391
 392    return GL_TRUE;
 393 }
 394
 395
 396 void intelInitDriverFunctions( struct dd_function_table *functions )
 397 {
 398    _mesa_init_driver_functions( functions );
 399
 400    functions->Flush = intelFlush;
 401    functions->Finish = intelFinish;
 402    functions->GetString = intelGetString;
 403    functions->UpdateState = intelInvalidateState;
 404    functions->BeginQuery = intelBeginQuery;
 405    functions->EndQuery = intelEndQuery;
 406
 407    /* CopyPixels can be accelerated even with the current memory
 408     * manager:
 409     */
 410    if (!getenv("INTEL_NO_BLIT")) {
 411       functions->CopyPixels = intelCopyPixels;
 412       functions->Bitmap = intelBitmap;
 413    }
 414
 415    intelInitTextureFuncs( functions );
 416    intelInitStateFuncs( functions );
 417    intelInitBufferFuncs( functions );
 418 }
 419
 420 GLboolean intelInitContext( struct intel_context *intel,
 421                             const __GLcontextModes *mesaVis,
 422                             __DRIcontextPrivate *driContextPriv,
 423                             void *sharedContextPrivate,
 424                             struct dd_function_table *functions )
 425 {
 426    GLcontext *ctx = &intel->ctx;
 427    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 428    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 429    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 430    volatile drmI830Sarea *saPriv = (drmI830Sarea *)
 431      (((GLubyte *)sPriv->pSAREA)+intelScreen->sarea_priv_offset);
 432
 433    if (!_mesa_initialize_context(&intel->ctx,
 434                                  mesaVis, shareCtx,
 435                                  functions,
 436                                  (void*) intel)) {
 437       _mesa_printf("%s: failed to init mesa context\n", __FUNCTION__);
 438       return GL_FALSE;
 439    }
 440
 441    driContextPriv->driverPrivate = intel;
 442    intel->intelScreen = intelScreen;
 443    intel->driScreen = sPriv;
 444    intel->sarea = saPriv;
 445
 446    /* Dri stuff */
 447    intel->hHWContext = driContextPriv->hHWContext;
 448    intel->driFd = sPriv->fd;
 449    intel->driHwLock = (drmLock *) &sPriv->pSAREA->lock;
 450
 451    intel->maxBatchSize = BATCH_SZ;
 452
 453    if (!intel_init_bufmgr(intel))
 454       return GL_FALSE;
 455
 456    driParseConfigFiles (&intel->optionCache, &intelScreen->optionCache,
 457                    intel->driScreen->myNum, "i965");
 458
 459    ctx->Const.MaxTextureMaxAnisotropy = 2.0;
 460
 461    if (getenv("INTEL_STRICT_CONFORMANCE")) {
 462       intel->strict_conformance = 1;
 463    }
 464
 465    if (intel->strict_conformance) {
 466       ctx->Const.MinLineWidth = 1.0;
 467       ctx->Const.MinLineWidthAA = 1.0;
 468       ctx->Const.MaxLineWidth = 1.0;
 469       ctx->Const.MaxLineWidthAA = 1.0;
 470       ctx->Const.LineWidthGranularity = 1.0;
 471    }
 472    else {
 473       ctx->Const.MinLineWidth = 1.0;
 474       ctx->Const.MinLineWidthAA = 1.0;
 475       ctx->Const.MaxLineWidth = 5.0;
 476       ctx->Const.MaxLineWidthAA = 5.0;
 477       ctx->Const.LineWidthGranularity = 0.5;
 478    }
 479
 480    ctx->Const.MinPointSize = 1.0;
 481    ctx->Const.MinPointSizeAA = 1.0;
 482    ctx->Const.MaxPointSize = 255.0;
 483    ctx->Const.MaxPointSizeAA = 3.0;
 484    ctx->Const.PointSizeGranularity = 1.0;
 485
 486    /* reinitialize the context point state.
 487     * It depend on constants in __GLcontextRec::Const
 488     */
 489    _mesa_init_point(ctx);
 490
 491    /* Initialize the software rasterizer and helper modules. */
 492    _swrast_CreateContext( ctx );
 493    _vbo_CreateContext( ctx );
 494    _tnl_CreateContext( ctx );
 495    _swsetup_CreateContext( ctx );
 496
 497    TNL_CONTEXT(ctx)->Driver.RunPipeline = _tnl_run_pipeline;
 498
 499    /* Configure swrast to match hardware characteristics: */
 500    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 501    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 502
 503    intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 504    intel->hw_stipple = 1;
 505
 506    switch(mesaVis->depthBits) {
 507    case 0:                      /* what to do in this case? */
 508    case 16:
 509       intel->depth_scale = 1.0/0xffff;
 510       intel->polygon_offset_scale = 1.0/0xffff;
 511       intel->depth_clear_mask = ~0;
 512       intel->ClearDepth = 0xffff;
 513       break;
 514    case 24:
 515       intel->depth_scale = 1.0/0xffffff;
 516       intel->polygon_offset_scale = 2.0/0xffffff; /* req'd to pass glean */
 517       intel->depth_clear_mask = 0x00ffffff;
 518       intel->stencil_clear_mask = 0xff000000;
 519       intel->ClearDepth = 0x00ffffff;
 520       break;
 521    default:
 522       assert(0);
 523       break;
 524    }
 525
 526    /* Initialize swrast, tnl driver tables: */
 527    intelInitSpanFuncs( ctx );
 528
 529    if (!intel->intelScreen->irq_active) {
 530       _mesa_printf("IRQs not active.  Exiting\n");
 531       exit(1);
 532    }
 533    intelInitExtensions(ctx, GL_TRUE);
 534
 535    INTEL_DEBUG  = driParseDebugString( getenv( "INTEL_DEBUG" ),
 536                                        debug_control );
 537    if (INTEL_DEBUG & DEBUG_BUFMGR)
 538       dri_bufmgr_set_debug(intel->bufmgr, GL_TRUE);
 539
 540    intel_recreate_static_regions(intel);
 541
 542    intel_bufferobj_init( intel );
 543    intel->batch = intel_batchbuffer_alloc( intel );
 544    intel->last_swap_fence = NULL;
 545    intel->first_swap_fence = NULL;
 546
 547    if (intel->ctx.Mesa_DXTn) {
 548       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 549       _mesa_enable_extension( ctx, "GL_S3_s3tc" );
 550    }
 551    else if (driQueryOptionb (&intel->optionCache, "force_s3tc_enable")) {
 552       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 553    }
 554
 555 /*    driInitTextureObjects( ctx, & intel->swapped, */
 556 /*                        DRI_TEXMGR_DO_TEXTURE_1D | */
 557 /*                        DRI_TEXMGR_DO_TEXTURE_2D |  */
 558 /*                        DRI_TEXMGR_DO_TEXTURE_RECT ); */
 559
 560    /* Force all software fallbacks */
 561    if (getenv("INTEL_NO_RAST")) {
 562       fprintf(stderr, "disabling 3D rasterization\n");
 563       intel->no_rast = 1;
 564    }
 565
 566    /* Disable all hardware rendering (skip emitting batches and fences/waits
 567     * to the kernel)
 568     */
 569    intel->no_hw = getenv("INTEL_NO_HW") != NULL;
 570
 571    return GL_TRUE;
 572 }
 573
 574 void intelDestroyContext(__DRIcontextPrivate *driContextPriv)
 575 {
 576    struct intel_context *intel = (struct intel_context *) driContextPriv->driverPrivate;
 577
 578    assert(intel); /* should never be null */
 579    if (intel) {
 580       GLboolean   release_texture_heaps;
 581
 582
 583       intel->vtbl.destroy( intel );
 584
 585       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 586       _swsetup_DestroyContext (&intel->ctx);
 587       _tnl_DestroyContext (&intel->ctx);
 588       _vbo_DestroyContext (&intel->ctx);
 589
 590       _swrast_DestroyContext (&intel->ctx);
 591       intel->Fallback = 0;      /* don't call _swrast_Flush later */
 592       intel_batchbuffer_free(intel->batch);
 593       intel->batch = NULL;
 594
 595       if (intel->last_swap_fence) {
 596          dri_fence_wait(intel->last_swap_fence);
 597          dri_fence_unreference(intel->last_swap_fence);
 598          intel->last_swap_fence = NULL;
 599       }
 600       if (intel->first_swap_fence) {
 601          dri_fence_wait(intel->first_swap_fence);
 602          dri_fence_unreference(intel->first_swap_fence);
 603          intel->first_swap_fence = NULL;
 604       }
 605
 606       if ( release_texture_heaps ) {
 607          /* This share group is about to go away, free our private
 608           * texture object data.
 609           */
 610
 611          /* XXX: destroy the shared bufmgr struct here?
 612           */
 613       }
 614
 615       /* Free the regions created to describe front/back/depth
 616        * buffers:
 617        */
 618 #if 0
 619       intel_region_release(&intel->front_region);
 620       intel_region_release(&intel->back_region);
 621       intel_region_release(&intel->depth_region);
 622       intel_region_release(&intel->draw_region);
 623 #endif
 624
 625       /* free the Mesa context */
 626       intel->ctx.VertexProgram.Current = NULL;
 627       intel->ctx.FragmentProgram.Current = NULL;
 628       _mesa_destroy_context(&intel->ctx);
 629    }
 630
 631    driContextPriv->driverPrivate = NULL;
 632 }
 633
 634 GLboolean intelUnbindContext(__DRIcontextPrivate *driContextPriv)
 635 {
 636    return GL_TRUE;
 637 }
 638
 639 GLboolean intelMakeCurrent(__DRIcontextPrivate *driContextPriv,
 640                           __DRIdrawablePrivate *driDrawPriv,
 641                           __DRIdrawablePrivate *driReadPriv)
 642 {
 643
 644    if (driContextPriv) {
 645       struct intel_context *intel = (struct intel_context *) driContextPriv->driverPrivate;
 646
 647       if (intel->driReadDrawable != driReadPriv) {
 648           intel->driReadDrawable = driReadPriv;
 649       }
 650
 651       if ( intel->driDrawable != driDrawPriv ) {
 652          if (driDrawPriv->swap_interval == (unsigned)-1) {
 653             driDrawPriv->vblFlags = (intel->intelScreen->irq_active != 0)
 654                ? driGetDefaultVBlankFlags(&intel->optionCache)
 655                : VBLANK_FLAG_NO_IRQ;
 656             driDrawableInitVBlank( driDrawPriv );
 657          }
 658
 659          intel->driDrawable = driDrawPriv;
 660          intelWindowMoved( intel );
 661          /* Shouldn't the readbuffer be stored also? */
 662       }
 663
 664       _mesa_make_current(&intel->ctx,
 665                          (GLframebuffer *) driDrawPriv->driverPrivate,
 666                          (GLframebuffer *) driReadPriv->driverPrivate);
 667
 668       intel->ctx.Driver.DrawBuffer( &intel->ctx, intel->ctx.Color.DrawBuffer[0] );
 669    } else {
 670       _mesa_make_current(NULL, NULL, NULL);
 671    }
 672
 673    return GL_TRUE;
 674 }
 675
 676
 677 static void intelContendedLock( struct intel_context *intel, GLuint flags )
 678 {
 679    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 680    __DRIscreenPrivate *sPriv = intel->driScreen;
 681    volatile drmI830Sarea * sarea = intel->sarea;
 682    int me = intel->hHWContext;
 683
 684    drmGetLock(intel->driFd, intel->hHWContext, flags);
 685
 686    /* If the window moved, may need to set a new cliprect now.
 687     *
 688     * NOTE: This releases and regains the hw lock, so all state
 689     * checking must be done *after* this call:
 690     */
 691    if (dPriv)
 692       DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 693
 694
 695    intel->locked = 1;
 696    intel->need_flush = 1;
 697
 698    /* Lost context?
 699     */
 700    if (sarea->ctxOwner != me) {
 701       if (INTEL_DEBUG & DEBUG_BUFMGR) {
 702          fprintf(stderr, "Lost Context: sarea->ctxOwner %x me %x\n",
 703                  sarea->ctxOwner, me);
 704       }
 705       sarea->ctxOwner = me;
 706       intel->vtbl.lost_hardware( intel );
 707    }
 708
 709    /* If the last consumer of the texture memory wasn't us, notify the fake
 710     * bufmgr and record the new owner.  We should have the memory shared
 711     * between contexts of a single fake bufmgr, but this will at least make
 712     * things correct for now.
 713     */
 714    if (!intel->ttm && sarea->texAge != intel->hHWContext) {
 715       sarea->texAge = intel->hHWContext;
 716       dri_bufmgr_fake_contended_lock_take(intel->bufmgr);
 717       if (INTEL_DEBUG & DEBUG_BATCH)
 718          intel_decode_context_reset();
 719       if (INTEL_DEBUG & DEBUG_BUFMGR) {
 720          fprintf(stderr, "Lost Textures: sarea->texAge %x hw context %x\n",
 721                  sarea->ctxOwner, intel->hHWContext);
 722       }
 723    }
 724
 725    /* Drawable changed?
 726     */
 727    if (dPriv && intel->lastStamp != dPriv->lastStamp) {
 728       intelWindowMoved( intel );
 729       intel->lastStamp = dPriv->lastStamp;
 730    }
 731 }
 732
 733 _glthread_DECLARE_STATIC_MUTEX(lockMutex);
 734
 735 /* Lock the hardware and validate our state.
 736  */
 737 void LOCK_HARDWARE( struct intel_context *intel )
 738 {
 739     char __ret=0;
 740
 741     _glthread_LOCK_MUTEX(lockMutex);
 742     assert(!intel->locked);
 743
 744
 745     DRM_CAS(intel->driHwLock, intel->hHWContext,
 746             (DRM_LOCK_HELD|intel->hHWContext), __ret);
 747     if (__ret)
 748         intelContendedLock( intel, 0 );
 749
 750    intel->locked = 1;
 751
 752 }
 753
 754
 755 /* Unlock the hardware using the global current context
 756  */
 757 void UNLOCK_HARDWARE( struct intel_context *intel )
 758 {
 759    intel->vtbl.note_unlock( intel );
 760    intel->locked = 0;
 761
 762    DRM_UNLOCK(intel->driFd, intel->driHwLock, intel->hHWContext);
 763    _glthread_UNLOCK_MUTEX(lockMutex);
 764 }
 765
 766