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 ttm_extensions[] = {
 211    {"GL_ARB_pixel_buffer_object", NULL},
 212    {NULL, NULL}
 213 };
 214
 215 const struct dri_extension arb_oc_extension =
 216     { "GL_ARB_occlusion_query",            GL_ARB_occlusion_query_functions};
 217
 218 /**
 219  * Initializes potential list of extensions if ctx == NULL, or actually enables
 220  * extensions for a context.
 221  */
 222 void intelInitExtensions(GLcontext *ctx, GLboolean enable_imaging)
 223 {
 224    struct intel_context *intel = ctx?intel_context(ctx):NULL;
 225
 226    /* Disable imaging extension until convolution is working in teximage paths.
 227     */
 228    enable_imaging = GL_FALSE;
 229
 230    driInitExtensions(ctx, card_extensions, enable_imaging);
 231
 232    if (intel == NULL || intel->ttm)
 233       driInitExtensions(ctx, ttm_extensions, GL_FALSE);
 234
 235    if (intel == NULL || intel->intelScreen->drmMinor >= 8)
 236       driInitSingleExtension(ctx, &arb_oc_extension);
 237 }
 238
 239 static const struct dri_debug_control debug_control[] =
 240 {
 241     { "fall",  DEBUG_FALLBACKS },
 242     { "tex",   DEBUG_TEXTURE },
 243     { "ioctl", DEBUG_IOCTL },
 244     { "prim",  DEBUG_PRIMS },
 245     { "vert",  DEBUG_VERTS },
 246     { "state", DEBUG_STATE },
 247     { "verb",  DEBUG_VERBOSE },
 248     { "dri",   DEBUG_DRI },
 249     { "dma",   DEBUG_DMA },
 250     { "san",   DEBUG_SANITY },
 251     { "sync",  DEBUG_SYNC },
 252     { "sleep", DEBUG_SLEEP },
 253     { "pix",   DEBUG_PIXEL },
 254     { "buf",   DEBUG_BUFMGR },
 255     { "stats", DEBUG_STATS },
 256     { "tile",  DEBUG_TILE },
 257     { "sing",  DEBUG_SINGLE_THREAD },
 258     { "thre",  DEBUG_SINGLE_THREAD },
 259     { "wm",    DEBUG_WM },
 260     { "vs",    DEBUG_VS },
 261     { "bat",   DEBUG_BATCH },
 262     { "blit",  DEBUG_BLIT},
 263     { "mip",   DEBUG_MIPTREE},
 264     { "reg",   DEBUG_REGION},
 265     { NULL,    0 }
 266 };
 267
 268
 269 static void intelInvalidateState( GLcontext *ctx, GLuint new_state )
 270 {
 271    struct intel_context *intel = intel_context(ctx);
 272
 273    _swrast_InvalidateState( ctx, new_state );
 274    _swsetup_InvalidateState( ctx, new_state );
 275    _vbo_InvalidateState( ctx, new_state );
 276    _tnl_InvalidateState( ctx, new_state );
 277    _tnl_invalidate_vertex_state( ctx, new_state );
 278
 279    intel->NewGLState |= new_state;
 280
 281    if (intel->vtbl.invalidate_state)
 282       intel->vtbl.invalidate_state( intel, new_state );
 283 }
 284
 285
 286 void intelFlush( GLcontext *ctx )
 287 {
 288    struct intel_context *intel = intel_context( ctx );
 289
 290    if (intel->batch->map != intel->batch->ptr)
 291       intel_batchbuffer_flush(intel->batch);
 292 }
 293
 294 void intelFinish( GLcontext *ctx )
 295 {
 296    struct intel_context *intel = intel_context( ctx );
 297
 298    intelFlush(ctx);
 299    if (intel->batch->last_fence) {
 300       dri_fence_wait(intel->batch->last_fence);
 301       dri_fence_unreference(intel->batch->last_fence);
 302       intel->batch->last_fence = NULL;
 303    }
 304 }
 305
 306 static void
 307 intelBeginQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
 308 {
 309         struct intel_context *intel = intel_context( ctx );
 310         drmI830MMIO io = {
 311                 .read_write = MMIO_READ,
 312                 .reg = MMIO_REGS_PS_DEPTH_COUNT,
 313                 .data = &q->Result
 314         };
 315         intel->stats_wm++;
 316         intelFinish(&intel->ctx);
 317         drmCommandWrite(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
 318 }
 319
 320 static void
 321 intelEndQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
 322 {
 323         struct intel_context *intel = intel_context( ctx );
 324         GLuint64EXT tmp;
 325         drmI830MMIO io = {
 326                 .read_write = MMIO_READ,
 327                 .reg = MMIO_REGS_PS_DEPTH_COUNT,
 328                 .data = &tmp
 329         };
 330         intelFinish(&intel->ctx);
 331         drmCommandWrite(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
 332         q->Result = tmp - q->Result;
 333         q->Ready = GL_TRUE;
 334         intel->stats_wm--;
 335 }
 336
 337 /** Driver-specific fence emit implementation for the fake memory manager. */
 338 static unsigned int
 339 intel_fence_emit(void *private)
 340 {
 341    struct intel_context *intel = (struct intel_context *)private;
 342    unsigned int fence;
 343
 344    /* XXX: Need to emit a flush, if we haven't already (at least with the
 345     * current batchbuffer implementation, we have).
 346     */
 347
 348    fence = intelEmitIrqLocked(intel);
 349
 350    return fence;
 351 }
 352
 353 /** Driver-specific fence wait implementation for the fake memory manager. */
 354 static int
 355 intel_fence_wait(void *private, unsigned int cookie)
 356 {
 357    struct intel_context *intel = (struct intel_context *)private;
 358
 359    intelWaitIrq(intel, cookie);
 360
 361    return 0;
 362 }
 363
 364 static GLboolean
 365 intel_init_bufmgr(struct intel_context *intel)
 366 {
 367    intelScreenPrivate *intelScreen = intel->intelScreen;
 368    GLboolean ttm_disable = getenv("INTEL_NO_TTM") != NULL;
 369
 370    /* If we've got a new enough DDX that's initializing TTM and giving us
 371     * object handles for the shared buffers, use that.
 372     */
 373    intel->ttm = GL_FALSE;
 374    if (!ttm_disable &&
 375        intel->intelScreen->driScrnPriv->ddx_version.minor >= 9 &&
 376        intel->intelScreen->drmMinor >= 11 &&
 377        intel->intelScreen->front.bo_handle != -1)
 378    {
 379       intel->bufmgr = intel_bufmgr_ttm_init(intel->driFd,
 380                                             DRM_FENCE_TYPE_EXE,
 381                                             DRM_FENCE_TYPE_EXE |
 382                                             DRM_I915_FENCE_TYPE_RW,
 383                                             BATCH_SZ);
 384       if (intel->bufmgr != NULL)
 385          intel->ttm = GL_TRUE;
 386    }
 387    /* Otherwise, use the classic buffer manager. */
 388    if (intel->bufmgr == NULL) {
 389       if (ttm_disable) {
 390          fprintf(stderr, "TTM buffer manager disabled.  Using classic.\n");
 391       } else {
 392          fprintf(stderr, "Failed to initialize TTM buffer manager.  "
 393                  "Falling back to classic.\n");
 394       }
 395
 396       if (intelScreen->tex.size == 0) {
 397          fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 398                  __func__, __LINE__);
 399          return GL_FALSE;
 400       }
 401
 402       intel->bufmgr = dri_bufmgr_fake_init(intelScreen->tex.offset,
 403                                            intelScreen->tex.map,
 404                                            intelScreen->tex.size,
 405                                            intel_fence_emit,
 406                                            intel_fence_wait,
 407                                            intel);
 408    }
 409
 410    return GL_TRUE;
 411 }
 412
 413
 414 void intelInitDriverFunctions( struct dd_function_table *functions )
 415 {
 416    _mesa_init_driver_functions( functions );
 417
 418    functions->Flush = intelFlush;
 419    functions->Finish = intelFinish;
 420    functions->GetString = intelGetString;
 421    functions->UpdateState = intelInvalidateState;
 422    functions->BeginQuery = intelBeginQuery;
 423    functions->EndQuery = intelEndQuery;
 424
 425    /* CopyPixels can be accelerated even with the current memory
 426     * manager:
 427     */
 428    if (!getenv("INTEL_NO_BLIT")) {
 429       functions->CopyPixels = intelCopyPixels;
 430       functions->Bitmap = intelBitmap;
 431    }
 432
 433    intelInitTextureFuncs( functions );
 434    intelInitStateFuncs( functions );
 435    intelInitBufferFuncs( functions );
 436 }
 437
 438 GLboolean intelInitContext( struct intel_context *intel,
 439                             const __GLcontextModes *mesaVis,
 440                             __DRIcontextPrivate *driContextPriv,
 441                             void *sharedContextPrivate,
 442                             struct dd_function_table *functions )
 443 {
 444    GLcontext *ctx = &intel->ctx;
 445    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 446    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 447    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 448    volatile drmI830Sarea *saPriv = (drmI830Sarea *)
 449      (((GLubyte *)sPriv->pSAREA)+intelScreen->sarea_priv_offset);
 450
 451    if (!_mesa_initialize_context(&intel->ctx,
 452                                  mesaVis, shareCtx,
 453                                  functions,
 454                                  (void*) intel)) {
 455       _mesa_printf("%s: failed to init mesa context\n", __FUNCTION__);
 456       return GL_FALSE;
 457    }
 458
 459    driContextPriv->driverPrivate = intel;
 460    intel->intelScreen = intelScreen;
 461    intel->driScreen = sPriv;
 462    intel->sarea = saPriv;
 463
 464    /* Dri stuff */
 465    intel->hHWContext = driContextPriv->hHWContext;
 466    intel->driFd = sPriv->fd;
 467    intel->driHwLock = (drmLock *) &sPriv->pSAREA->lock;
 468
 469    intel->maxBatchSize = BATCH_SZ;
 470
 471    if (!intel_init_bufmgr(intel))
 472       return GL_FALSE;
 473
 474    driParseConfigFiles (&intel->optionCache, &intelScreen->optionCache,
 475                    intel->driScreen->myNum, "i965");
 476
 477    ctx->Const.MaxTextureMaxAnisotropy = 2.0;
 478
 479    if (getenv("INTEL_STRICT_CONFORMANCE")) {
 480       intel->strict_conformance = 1;
 481    }
 482
 483    if (intel->strict_conformance) {
 484       ctx->Const.MinLineWidth = 1.0;
 485       ctx->Const.MinLineWidthAA = 1.0;
 486       ctx->Const.MaxLineWidth = 1.0;
 487       ctx->Const.MaxLineWidthAA = 1.0;
 488       ctx->Const.LineWidthGranularity = 1.0;
 489    }
 490    else {
 491       ctx->Const.MinLineWidth = 1.0;
 492       ctx->Const.MinLineWidthAA = 1.0;
 493       ctx->Const.MaxLineWidth = 5.0;
 494       ctx->Const.MaxLineWidthAA = 5.0;
 495       ctx->Const.LineWidthGranularity = 0.5;
 496    }
 497
 498    ctx->Const.MinPointSize = 1.0;
 499    ctx->Const.MinPointSizeAA = 1.0;
 500    ctx->Const.MaxPointSize = 255.0;
 501    ctx->Const.MaxPointSizeAA = 3.0;
 502    ctx->Const.PointSizeGranularity = 1.0;
 503
 504    /* reinitialize the context point state.
 505     * It depend on constants in __GLcontextRec::Const
 506     */
 507    _mesa_init_point(ctx);
 508
 509    /* Initialize the software rasterizer and helper modules. */
 510    _swrast_CreateContext( ctx );
 511    _vbo_CreateContext( ctx );
 512    _tnl_CreateContext( ctx );
 513    _swsetup_CreateContext( ctx );
 514
 515    TNL_CONTEXT(ctx)->Driver.RunPipeline = _tnl_run_pipeline;
 516
 517    /* Configure swrast to match hardware characteristics: */
 518    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 519    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 520
 521    intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 522    intel->hw_stipple = 1;
 523
 524    switch(mesaVis->depthBits) {
 525    case 0:                      /* what to do in this case? */
 526    case 16:
 527       intel->polygon_offset_scale = 1.0/0xffff;
 528       break;
 529    case 24:
 530       intel->polygon_offset_scale = 2.0/0xffffff; /* req'd to pass glean */
 531       break;
 532    default:
 533       assert(0);
 534       break;
 535    }
 536
 537    /* Initialize swrast, tnl driver tables: */
 538    intelInitSpanFuncs( ctx );
 539
 540    if (!intel->intelScreen->irq_active) {
 541       _mesa_printf("IRQs not active.  Exiting\n");
 542       exit(1);
 543    }
 544    intelInitExtensions(ctx, GL_TRUE);
 545
 546    INTEL_DEBUG  = driParseDebugString( getenv( "INTEL_DEBUG" ),
 547                                        debug_control );
 548    if (INTEL_DEBUG & DEBUG_BUFMGR)
 549       dri_bufmgr_set_debug(intel->bufmgr, GL_TRUE);
 550
 551    intel_recreate_static_regions(intel);
 552
 553    intel_bufferobj_init( intel );
 554    intel->batch = intel_batchbuffer_alloc( intel );
 555    intel->last_swap_fence = NULL;
 556    intel->first_swap_fence = NULL;
 557
 558    if (intel->ctx.Mesa_DXTn) {
 559       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 560       _mesa_enable_extension( ctx, "GL_S3_s3tc" );
 561    }
 562    else if (driQueryOptionb (&intel->optionCache, "force_s3tc_enable")) {
 563       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 564    }
 565
 566 /*    driInitTextureObjects( ctx, & intel->swapped, */
 567 /*                        DRI_TEXMGR_DO_TEXTURE_1D | */
 568 /*                        DRI_TEXMGR_DO_TEXTURE_2D |  */
 569 /*                        DRI_TEXMGR_DO_TEXTURE_RECT ); */
 570
 571    /* Force all software fallbacks */
 572    if (getenv("INTEL_NO_RAST")) {
 573       fprintf(stderr, "disabling 3D rasterization\n");
 574       intel->no_rast = 1;
 575    }
 576
 577    /* Disable all hardware rendering (skip emitting batches and fences/waits
 578     * to the kernel)
 579     */
 580    intel->no_hw = getenv("INTEL_NO_HW") != NULL;
 581
 582    return GL_TRUE;
 583 }
 584
 585 void intelDestroyContext(__DRIcontextPrivate *driContextPriv)
 586 {
 587    struct intel_context *intel = (struct intel_context *) driContextPriv->driverPrivate;
 588
 589    assert(intel); /* should never be null */
 590    if (intel) {
 591       GLboolean   release_texture_heaps;
 592
 593
 594       intel->vtbl.destroy( intel );
 595
 596       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 597       _swsetup_DestroyContext (&intel->ctx);
 598       _tnl_DestroyContext (&intel->ctx);
 599       _vbo_DestroyContext (&intel->ctx);
 600
 601       _swrast_DestroyContext (&intel->ctx);
 602       intel->Fallback = 0;      /* don't call _swrast_Flush later */
 603       intel_batchbuffer_free(intel->batch);
 604       intel->batch = NULL;
 605
 606       if (intel->last_swap_fence) {
 607          dri_fence_wait(intel->last_swap_fence);
 608          dri_fence_unreference(intel->last_swap_fence);
 609          intel->last_swap_fence = NULL;
 610       }
 611       if (intel->first_swap_fence) {
 612          dri_fence_wait(intel->first_swap_fence);
 613          dri_fence_unreference(intel->first_swap_fence);
 614          intel->first_swap_fence = NULL;
 615       }
 616
 617       if ( release_texture_heaps ) {
 618          /* This share group is about to go away, free our private
 619           * texture object data.
 620           */
 621
 622          /* XXX: destroy the shared bufmgr struct here?
 623           */
 624       }
 625
 626       /* Free the regions created to describe front/back/depth
 627        * buffers:
 628        */
 629 #if 0
 630       intel_region_release(&intel->front_region);
 631       intel_region_release(&intel->back_region);
 632       intel_region_release(&intel->depth_region);
 633       intel_region_release(&intel->draw_region);
 634 #endif
 635
 636       /* free the Mesa context */
 637       intel->ctx.VertexProgram.Current = NULL;
 638       intel->ctx.FragmentProgram.Current = NULL;
 639       _mesa_destroy_context(&intel->ctx);
 640    }
 641
 642    driContextPriv->driverPrivate = NULL;
 643 }
 644
 645 GLboolean intelUnbindContext(__DRIcontextPrivate *driContextPriv)
 646 {
 647    return GL_TRUE;
 648 }
 649
 650 GLboolean intelMakeCurrent(__DRIcontextPrivate *driContextPriv,
 651                           __DRIdrawablePrivate *driDrawPriv,
 652                           __DRIdrawablePrivate *driReadPriv)
 653 {
 654
 655    if (driContextPriv) {
 656       struct intel_context *intel = (struct intel_context *) driContextPriv->driverPrivate;
 657
 658       if (intel->driReadDrawable != driReadPriv) {
 659           intel->driReadDrawable = driReadPriv;
 660       }
 661
 662       if ( intel->driDrawable != driDrawPriv ) {
 663          if (driDrawPriv->swap_interval == (unsigned)-1) {
 664             driDrawPriv->vblFlags = (intel->intelScreen->irq_active != 0)
 665                ? driGetDefaultVBlankFlags(&intel->optionCache)
 666                : VBLANK_FLAG_NO_IRQ;
 667             driDrawableInitVBlank( driDrawPriv );
 668          }
 669
 670          intel->driDrawable = driDrawPriv;
 671          intelWindowMoved( intel );
 672          /* Shouldn't the readbuffer be stored also? */
 673       }
 674
 675       _mesa_make_current(&intel->ctx,
 676                          (GLframebuffer *) driDrawPriv->driverPrivate,
 677                          (GLframebuffer *) driReadPriv->driverPrivate);
 678
 679       intel->ctx.Driver.DrawBuffer( &intel->ctx, intel->ctx.Color.DrawBuffer[0] );
 680    } else {
 681       _mesa_make_current(NULL, NULL, NULL);
 682    }
 683
 684    return GL_TRUE;
 685 }
 686
 687
 688 static void intelContendedLock( struct intel_context *intel, GLuint flags )
 689 {
 690    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 691    __DRIscreenPrivate *sPriv = intel->driScreen;
 692    volatile drmI830Sarea * sarea = intel->sarea;
 693    int me = intel->hHWContext;
 694
 695    drmGetLock(intel->driFd, intel->hHWContext, flags);
 696
 697    /* If the window moved, may need to set a new cliprect now.
 698     *
 699     * NOTE: This releases and regains the hw lock, so all state
 700     * checking must be done *after* this call:
 701     */
 702    if (dPriv)
 703       DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 704
 705
 706    intel->locked = 1;
 707    intel->need_flush = 1;
 708
 709    /* Lost context?
 710     */
 711    if (sarea->ctxOwner != me) {
 712       if (INTEL_DEBUG & DEBUG_BUFMGR) {
 713          fprintf(stderr, "Lost Context: sarea->ctxOwner %x me %x\n",
 714                  sarea->ctxOwner, me);
 715       }
 716       sarea->ctxOwner = me;
 717       intel->vtbl.lost_hardware( intel );
 718    }
 719
 720    /* If the last consumer of the texture memory wasn't us, notify the fake
 721     * bufmgr and record the new owner.  We should have the memory shared
 722     * between contexts of a single fake bufmgr, but this will at least make
 723     * things correct for now.
 724     */
 725    if (!intel->ttm && sarea->texAge != intel->hHWContext) {
 726       sarea->texAge = intel->hHWContext;
 727       dri_bufmgr_fake_contended_lock_take(intel->bufmgr);
 728       if (INTEL_DEBUG & DEBUG_BATCH)
 729          intel_decode_context_reset();
 730       if (INTEL_DEBUG & DEBUG_BUFMGR) {
 731          fprintf(stderr, "Lost Textures: sarea->texAge %x hw context %x\n",
 732                  sarea->ctxOwner, intel->hHWContext);
 733       }
 734    }
 735
 736    /* Drawable changed?
 737     */
 738    if (dPriv && intel->lastStamp != dPriv->lastStamp) {
 739       intelWindowMoved( intel );
 740       intel->lastStamp = dPriv->lastStamp;
 741    }
 742 }
 743
 744 _glthread_DECLARE_STATIC_MUTEX(lockMutex);
 745
 746 /* Lock the hardware and validate our state.
 747  */
 748 void LOCK_HARDWARE( struct intel_context *intel )
 749 {
 750     char __ret=0;
 751
 752     _glthread_LOCK_MUTEX(lockMutex);
 753     assert(!intel->locked);
 754
 755
 756     DRM_CAS(intel->driHwLock, intel->hHWContext,
 757             (DRM_LOCK_HELD|intel->hHWContext), __ret);
 758     if (__ret)
 759         intelContendedLock( intel, 0 );
 760
 761    intel->locked = 1;
 762
 763 }
 764
 765
 766 /* Unlock the hardware using the global current context
 767  */
 768 void UNLOCK_HARDWARE( struct intel_context *intel )
 769 {
 770    intel->vtbl.note_unlock( intel );
 771    intel->locked = 0;
 772
 773    DRM_UNLOCK(intel->driFd, intel->driHwLock, intel->hHWContext);
 774    _glthread_UNLOCK_MUTEX(lockMutex);
 775 }
 776
 777