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_buffers.h"
  61 #include "intel_buffer_objects.h"
  62 #include "intel_decode.h"
  63 #include "intel_fbo.h"
  64 #include "intel_bufmgr_ttm.h"
  65
  66 #include "drirenderbuffer.h"
  67 #include "i915_drm.h"
  68
  69 #include "utils.h"
  70 #include "vblank.h"
  71 #ifndef INTEL_DEBUG
  72 int INTEL_DEBUG = (0);
  73 #endif
  74
  75 #define need_GL_NV_point_sprite
  76 #define need_GL_ARB_multisample
  77 #define need_GL_ARB_point_parameters
  78 #define need_GL_ARB_texture_compression
  79 #define need_GL_ARB_vertex_buffer_object
  80 #define need_GL_ARB_vertex_program
  81 #define need_GL_ARB_window_pos
  82 #define need_GL_ARB_occlusion_query
  83 #define need_GL_EXT_blend_color
  84 #define need_GL_EXT_blend_equation_separate
  85 #define need_GL_EXT_blend_func_separate
  86 #define need_GL_EXT_blend_minmax
  87 #define need_GL_EXT_cull_vertex
  88 #define need_GL_EXT_fog_coord
  89 #define need_GL_EXT_framebuffer_object
  90 #define need_GL_EXT_multi_draw_arrays
  91 #define need_GL_EXT_secondary_color
  92 #define need_GL_ATI_separate_stencil
  93 #define need_GL_EXT_point_parameters
  94 #define need_GL_VERSION_2_0
  95 #define need_GL_VERSION_2_1
  96 #define need_GL_ARB_shader_objects
  97 #define need_GL_ARB_vertex_shader
  98
  99 #include "extension_helper.h"
 100
 101 #ifndef VERBOSE
 102 int VERBOSE = 0;
 103 #endif
 104
 105 /***************************************
 106  * Mesa's Driver Functions
 107  ***************************************/
 108
 109 #define DRIVER_VERSION                     "4.1.3002"
 110
 111 static const GLubyte *intelGetString( GLcontext *ctx, GLenum name )
 112 {
 113    const char * chipset;
 114    static char buffer[128];
 115
 116    switch (name) {
 117    case GL_VENDOR:
 118       return (GLubyte *)"Tungsten Graphics, Inc";
 119       break;
 120
 121    case GL_RENDERER:
 122       switch (intel_context(ctx)->intelScreen->deviceID) {
 123       case PCI_CHIP_I965_Q:
 124          chipset = "Intel(R) 965Q";
 125          break;
 126       case PCI_CHIP_I965_G:
 127       case PCI_CHIP_I965_G_1:
 128          chipset = "Intel(R) 965G";
 129          break;
 130       case PCI_CHIP_I946_GZ:
 131          chipset = "Intel(R) 946GZ";
 132          break;
 133       case PCI_CHIP_I965_GM:
 134          chipset = "Intel(R) 965GM";
 135          break;
 136       case PCI_CHIP_I965_GME:
 137          chipset = "Intel(R) 965GME/GLE";
 138          break;
 139       default:
 140          chipset = "Unknown Intel Chipset";
 141       }
 142
 143       (void) driGetRendererString( buffer, chipset, DRIVER_VERSION, 0 );
 144       return (GLubyte *) buffer;
 145
 146    default:
 147       return NULL;
 148    }
 149 }
 150
 151
 152 /**
 153  * Extension strings exported by the intel driver.
 154  *
 155  * \note
 156  * It appears that ARB_texture_env_crossbar has "disappeared" compared to the
 157  * old i830-specific driver.
 158  */
 159 const struct dri_extension card_extensions[] =
 160 {
 161     { "GL_ARB_multisample",                GL_ARB_multisample_functions },
 162     { "GL_ARB_multitexture",               NULL },
 163     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 164     { "GL_NV_point_sprite",                GL_NV_point_sprite_functions },
 165     { "GL_ARB_texture_border_clamp",       NULL },
 166     { "GL_ARB_texture_compression",        GL_ARB_texture_compression_functions },
 167     { "GL_ARB_texture_cube_map",           NULL },
 168     { "GL_ARB_texture_env_add",            NULL },
 169     { "GL_ARB_texture_env_combine",        NULL },
 170     { "GL_ARB_texture_env_dot3",           NULL },
 171     { "GL_ARB_texture_mirrored_repeat",    NULL },
 172     { "GL_ARB_texture_non_power_of_two",   NULL },
 173     { "GL_ARB_texture_rectangle",          NULL },
 174     { "GL_NV_texture_rectangle",           NULL },
 175     { "GL_EXT_texture_rectangle",          NULL },
 176     { "GL_ARB_texture_rectangle",          NULL },
 177     { "GL_ARB_point_sprite",               NULL},
 178     { "GL_ARB_point_parameters",           NULL },
 179     { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
 180     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions },
 181     { "GL_ARB_window_pos",                 GL_ARB_window_pos_functions },
 182     { "GL_EXT_blend_color",                GL_EXT_blend_color_functions },
 183     { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
 184     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
 185     { "GL_EXT_blend_minmax",               GL_EXT_blend_minmax_functions },
 186     { "GL_EXT_blend_logic_op",             NULL },
 187     { "GL_EXT_blend_subtract",             NULL },
 188     { "GL_EXT_cull_vertex",                GL_EXT_cull_vertex_functions },
 189     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
 190     { "GL_EXT_multi_draw_arrays",          GL_EXT_multi_draw_arrays_functions },
 191     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 192     { "GL_ATI_separate_stencil",           GL_ATI_separate_stencil_functions },
 193     { "GL_EXT_stencil_wrap",               NULL },
 194     /* Do not enable this extension.  It conflicts with GL_ATI_separate_stencil
 195      * and 2.0's separate stencil, because mesa's computed _TestTwoSide will
 196      * only reflect whether it's enabled through this extension, even if the
 197      * application is using the other interfaces.
 198      */
 199 /*{ "GL_EXT_stencil_two_side",           GL_EXT_stencil_two_side_functions },*/
 200     { "GL_EXT_texture_edge_clamp",         NULL },
 201     { "GL_EXT_texture_env_combine",        NULL },
 202     { "GL_EXT_texture_env_dot3",           NULL },
 203     { "GL_EXT_texture_filter_anisotropic", NULL },
 204     { "GL_EXT_texture_lod_bias",           NULL },
 205     { "GL_EXT_texture_sRGB",               NULL },
 206     { "GL_3DFX_texture_compression_FXT1",  NULL },
 207     { "GL_APPLE_client_storage",           NULL },
 208     { "GL_MESA_pack_invert",               NULL },
 209     { "GL_MESA_ycbcr_texture",             NULL },
 210     { "GL_NV_blend_square",                NULL },
 211     { "GL_SGIS_generate_mipmap",           NULL },
 212     { "GL_ARB_shading_language_100",       GL_VERSION_2_0_functions},
 213     { "GL_ARB_shading_language_120",       GL_VERSION_2_1_functions},
 214     { "GL_ARB_shader_objects",             GL_ARB_shader_objects_functions},
 215     { "GL_ARB_vertex_shader",              GL_ARB_vertex_shader_functions},
 216     { "GL_ARB_fragment_shader",            NULL },
 217     { "GL_ARB_draw_buffers",               NULL },
 218     { NULL,                                NULL }
 219 };
 220
 221 const struct dri_extension ttm_extensions[] = {
 222    {"GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions},
 223    {"GL_ARB_pixel_buffer_object", NULL},
 224    {NULL, NULL}
 225 };
 226
 227 const struct dri_extension arb_oc_extension =
 228     { "GL_ARB_occlusion_query",            GL_ARB_occlusion_query_functions};
 229
 230 /**
 231  * Initializes potential list of extensions if ctx == NULL, or actually enables
 232  * extensions for a context.
 233  */
 234 void intelInitExtensions(GLcontext *ctx, GLboolean enable_imaging)
 235 {
 236    struct intel_context *intel = ctx?intel_context(ctx):NULL;
 237
 238    /* Disable imaging extension until convolution is working in teximage paths.
 239     */
 240    enable_imaging = GL_FALSE;
 241
 242    driInitExtensions(ctx, card_extensions, enable_imaging);
 243
 244    if (intel == NULL || intel->ttm)
 245       driInitExtensions(ctx, ttm_extensions, GL_FALSE);
 246
 247    if (intel == NULL || intel->intelScreen->drmMinor >= 8)
 248       driInitSingleExtension(ctx, &arb_oc_extension);
 249 }
 250
 251 static const struct dri_debug_control debug_control[] =
 252 {
 253     { "fall",  DEBUG_FALLBACKS },
 254     { "tex",   DEBUG_TEXTURE },
 255     { "ioctl", DEBUG_IOCTL },
 256     { "prim",  DEBUG_PRIMS },
 257     { "vert",  DEBUG_VERTS },
 258     { "state", DEBUG_STATE },
 259     { "verb",  DEBUG_VERBOSE },
 260     { "dri",   DEBUG_DRI },
 261     { "dma",   DEBUG_DMA },
 262     { "san",   DEBUG_SANITY },
 263     { "sync",  DEBUG_SYNC },
 264     { "sleep", DEBUG_SLEEP },
 265     { "pix",   DEBUG_PIXEL },
 266     { "buf",   DEBUG_BUFMGR },
 267     { "stats", DEBUG_STATS },
 268     { "tile",  DEBUG_TILE },
 269     { "sing",  DEBUG_SINGLE_THREAD },
 270     { "thre",  DEBUG_SINGLE_THREAD },
 271     { "wm",    DEBUG_WM },
 272     { "vs",    DEBUG_VS },
 273     { "bat",   DEBUG_BATCH },
 274     { "blit",  DEBUG_BLIT},
 275     { "mip",   DEBUG_MIPTREE},
 276     { "reg",   DEBUG_REGION},
 277     { "fbo",   DEBUG_FBO },
 278     { NULL,    0 }
 279 };
 280
 281
 282 static void intelInvalidateState( GLcontext *ctx, GLuint new_state )
 283 {
 284    struct intel_context *intel = intel_context(ctx);
 285
 286    _swrast_InvalidateState( ctx, new_state );
 287    _swsetup_InvalidateState( ctx, new_state );
 288    _vbo_InvalidateState( ctx, new_state );
 289    _tnl_InvalidateState( ctx, new_state );
 290    _tnl_invalidate_vertex_state( ctx, new_state );
 291
 292    intel->NewGLState |= new_state;
 293
 294    if (intel->vtbl.invalidate_state)
 295       intel->vtbl.invalidate_state( intel, new_state );
 296 }
 297
 298
 299 void intelFlush( GLcontext *ctx )
 300 {
 301    struct intel_context *intel = intel_context( ctx );
 302
 303    if (intel->batch->map != intel->batch->ptr)
 304       intel_batchbuffer_flush(intel->batch);
 305 }
 306
 307 void intelFinish( GLcontext *ctx )
 308 {
 309    struct intel_context *intel = intel_context( ctx );
 310
 311    intelFlush(ctx);
 312    if (intel->batch->last_fence) {
 313       dri_fence_wait(intel->batch->last_fence);
 314       dri_fence_unreference(intel->batch->last_fence);
 315       intel->batch->last_fence = NULL;
 316    }
 317 }
 318
 319 static void
 320 intelBeginQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
 321 {
 322         struct intel_context *intel = intel_context( ctx );
 323         drmI830MMIO io = {
 324                 .read_write = MMIO_READ,
 325                 .reg = MMIO_REGS_PS_DEPTH_COUNT,
 326                 .data = &q->Result
 327         };
 328         intel->stats_wm++;
 329         intelFinish(&intel->ctx);
 330         drmCommandWrite(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
 331 }
 332
 333 static void
 334 intelEndQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
 335 {
 336         struct intel_context *intel = intel_context( ctx );
 337         GLuint64EXT tmp;
 338         drmI830MMIO io = {
 339                 .read_write = MMIO_READ,
 340                 .reg = MMIO_REGS_PS_DEPTH_COUNT,
 341                 .data = &tmp
 342         };
 343         intelFinish(&intel->ctx);
 344         drmCommandWrite(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
 345         q->Result = tmp - q->Result;
 346         q->Ready = GL_TRUE;
 347         intel->stats_wm--;
 348 }
 349
 350 /** Driver-specific fence emit implementation for the fake memory manager. */
 351 static unsigned int
 352 intel_fence_emit(void *private)
 353 {
 354    struct intel_context *intel = (struct intel_context *)private;
 355    unsigned int fence;
 356
 357    /* XXX: Need to emit a flush, if we haven't already (at least with the
 358     * current batchbuffer implementation, we have).
 359     */
 360
 361    fence = intelEmitIrqLocked(intel);
 362
 363    return fence;
 364 }
 365
 366 /** Driver-specific fence wait implementation for the fake memory manager. */
 367 static int
 368 intel_fence_wait(void *private, unsigned int cookie)
 369 {
 370    struct intel_context *intel = (struct intel_context *)private;
 371
 372    intelWaitIrq(intel, cookie);
 373
 374    return 0;
 375 }
 376
 377 static GLboolean
 378 intel_init_bufmgr(struct intel_context *intel)
 379 {
 380    intelScreenPrivate *intelScreen = intel->intelScreen;
 381    GLboolean ttm_disable = getenv("INTEL_NO_TTM") != NULL;
 382
 383    /* If we've got a new enough DDX that's initializing TTM and giving us
 384     * object handles for the shared buffers, use that.
 385     */
 386    intel->ttm = GL_FALSE;
 387    if (!ttm_disable &&
 388        intel->intelScreen->driScrnPriv->ddx_version.minor >= 9 &&
 389        intel->intelScreen->drmMinor >= 11 &&
 390        intel->intelScreen->front.bo_handle != -1)
 391    {
 392       intel->bufmgr = intel_bufmgr_ttm_init(intel->driFd,
 393                                             DRM_FENCE_TYPE_EXE,
 394                                             DRM_FENCE_TYPE_EXE |
 395                                             DRM_I915_FENCE_TYPE_RW,
 396                                             BATCH_SZ);
 397       if (intel->bufmgr != NULL)
 398          intel->ttm = GL_TRUE;
 399    }
 400    /* Otherwise, use the classic buffer manager. */
 401    if (intel->bufmgr == NULL) {
 402       if (ttm_disable) {
 403          fprintf(stderr, "TTM buffer manager disabled.  Using classic.\n");
 404       } else {
 405          fprintf(stderr, "Failed to initialize TTM buffer manager.  "
 406                  "Falling back to classic.\n");
 407       }
 408
 409       if (intelScreen->tex.size == 0) {
 410          fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 411                  __func__, __LINE__);
 412          return GL_FALSE;
 413       }
 414
 415       intel->bufmgr = dri_bufmgr_fake_init(intelScreen->tex.offset,
 416                                            intelScreen->tex.map,
 417                                            intelScreen->tex.size,
 418                                            intel_fence_emit,
 419                                            intel_fence_wait,
 420                                            intel);
 421    }
 422
 423    return GL_TRUE;
 424 }
 425
 426
 427 void intelInitDriverFunctions( struct dd_function_table *functions )
 428 {
 429    _mesa_init_driver_functions( functions );
 430
 431    functions->Flush = intelFlush;
 432    functions->Finish = intelFinish;
 433    functions->GetString = intelGetString;
 434    functions->UpdateState = intelInvalidateState;
 435    functions->BeginQuery = intelBeginQuery;
 436    functions->EndQuery = intelEndQuery;
 437
 438    /* CopyPixels can be accelerated even with the current memory
 439     * manager:
 440     */
 441    if (!getenv("INTEL_NO_BLIT")) {
 442       functions->CopyPixels = intelCopyPixels;
 443       functions->Bitmap = intelBitmap;
 444    }
 445
 446    intelInitTextureFuncs( functions );
 447    intelInitStateFuncs( functions );
 448    intelInitBufferFuncs( functions );
 449 }
 450
 451 GLboolean intelInitContext( struct intel_context *intel,
 452                             const __GLcontextModes *mesaVis,
 453                             __DRIcontextPrivate *driContextPriv,
 454                             void *sharedContextPrivate,
 455                             struct dd_function_table *functions )
 456 {
 457    GLcontext *ctx = &intel->ctx;
 458    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 459    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 460    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 461    volatile drmI830Sarea *saPriv = (drmI830Sarea *)
 462      (((GLubyte *)sPriv->pSAREA)+intelScreen->sarea_priv_offset);
 463
 464    if (!_mesa_initialize_context(&intel->ctx,
 465                                  mesaVis, shareCtx,
 466                                  functions,
 467                                  (void*) intel)) {
 468       _mesa_printf("%s: failed to init mesa context\n", __FUNCTION__);
 469       return GL_FALSE;
 470    }
 471
 472    driContextPriv->driverPrivate = intel;
 473    intel->intelScreen = intelScreen;
 474    intel->driScreen = sPriv;
 475    intel->sarea = saPriv;
 476
 477    /* Dri stuff */
 478    intel->hHWContext = driContextPriv->hHWContext;
 479    intel->driFd = sPriv->fd;
 480    intel->driHwLock = (drmLock *) &sPriv->pSAREA->lock;
 481
 482    intel->maxBatchSize = BATCH_SZ;
 483
 484    if (!intel_init_bufmgr(intel))
 485       return GL_FALSE;
 486
 487    driParseConfigFiles (&intel->optionCache, &intelScreen->optionCache,
 488                    intel->driScreen->myNum, "i965");
 489
 490    ctx->Const.MaxTextureMaxAnisotropy = 2.0;
 491
 492    if (getenv("INTEL_STRICT_CONFORMANCE")) {
 493       intel->strict_conformance = 1;
 494    }
 495
 496    if (intel->strict_conformance) {
 497       ctx->Const.MinLineWidth = 1.0;
 498       ctx->Const.MinLineWidthAA = 1.0;
 499       ctx->Const.MaxLineWidth = 1.0;
 500       ctx->Const.MaxLineWidthAA = 1.0;
 501       ctx->Const.LineWidthGranularity = 1.0;
 502    }
 503    else {
 504       ctx->Const.MinLineWidth = 1.0;
 505       ctx->Const.MinLineWidthAA = 1.0;
 506       ctx->Const.MaxLineWidth = 5.0;
 507       ctx->Const.MaxLineWidthAA = 5.0;
 508       ctx->Const.LineWidthGranularity = 0.5;
 509    }
 510
 511    ctx->Const.MinPointSize = 1.0;
 512    ctx->Const.MinPointSizeAA = 1.0;
 513    ctx->Const.MaxPointSize = 255.0;
 514    ctx->Const.MaxPointSizeAA = 3.0;
 515    ctx->Const.PointSizeGranularity = 1.0;
 516
 517    /* reinitialize the context point state.
 518     * It depend on constants in __GLcontextRec::Const
 519     */
 520    _mesa_init_point(ctx);
 521
 522    /* Initialize the software rasterizer and helper modules. */
 523    _swrast_CreateContext( ctx );
 524    _vbo_CreateContext( ctx );
 525    _tnl_CreateContext( ctx );
 526    _swsetup_CreateContext( ctx );
 527
 528    TNL_CONTEXT(ctx)->Driver.RunPipeline = _tnl_run_pipeline;
 529
 530    /* Configure swrast to match hardware characteristics: */
 531    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 532    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 533
 534    intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 535    intel->hw_stipple = 1;
 536
 537    switch(mesaVis->depthBits) {
 538    case 0:                      /* what to do in this case? */
 539    case 16:
 540       intel->polygon_offset_scale = 1.0/0xffff;
 541       break;
 542    case 24:
 543       intel->polygon_offset_scale = 2.0/0xffffff; /* req'd to pass glean */
 544       break;
 545    default:
 546       assert(0);
 547       break;
 548    }
 549
 550    /* Initialize swrast, tnl driver tables: */
 551    intelInitSpanFuncs( ctx );
 552
 553    if (!intel->intelScreen->irq_active) {
 554       _mesa_printf("IRQs not active.  Exiting\n");
 555       exit(1);
 556    }
 557    intelInitExtensions(ctx, GL_TRUE);
 558
 559    INTEL_DEBUG  = driParseDebugString( getenv( "INTEL_DEBUG" ),
 560                                        debug_control );
 561    if (INTEL_DEBUG & DEBUG_BUFMGR)
 562       dri_bufmgr_set_debug(intel->bufmgr, GL_TRUE);
 563
 564    intel_recreate_static_regions(intel);
 565
 566    intel_bufferobj_init( intel );
 567    intel_fbo_init( intel );
 568
 569    intel->batch = intel_batchbuffer_alloc( intel );
 570    intel->last_swap_fence = NULL;
 571    intel->first_swap_fence = NULL;
 572
 573    if (intel->ctx.Mesa_DXTn) {
 574       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 575       _mesa_enable_extension( ctx, "GL_S3_s3tc" );
 576    }
 577    else if (driQueryOptionb (&intel->optionCache, "force_s3tc_enable")) {
 578       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 579    }
 580
 581 /*    driInitTextureObjects( ctx, & intel->swapped, */
 582 /*                        DRI_TEXMGR_DO_TEXTURE_1D | */
 583 /*                        DRI_TEXMGR_DO_TEXTURE_2D |  */
 584 /*                        DRI_TEXMGR_DO_TEXTURE_RECT ); */
 585
 586    /* Force all software fallbacks */
 587    if (getenv("INTEL_NO_RAST")) {
 588       fprintf(stderr, "disabling 3D rasterization\n");
 589       intel->no_rast = 1;
 590    }
 591
 592    /* Disable all hardware rendering (skip emitting batches and fences/waits
 593     * to the kernel)
 594     */
 595    intel->no_hw = getenv("INTEL_NO_HW") != NULL;
 596
 597    return GL_TRUE;
 598 }
 599
 600 void intelDestroyContext(__DRIcontextPrivate *driContextPriv)
 601 {
 602    struct intel_context *intel = (struct intel_context *) driContextPriv->driverPrivate;
 603
 604    assert(intel); /* should never be null */
 605    if (intel) {
 606       GLboolean   release_texture_heaps;
 607
 608
 609       intel->vtbl.destroy( intel );
 610
 611       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 612       _swsetup_DestroyContext (&intel->ctx);
 613       _tnl_DestroyContext (&intel->ctx);
 614       _vbo_DestroyContext (&intel->ctx);
 615
 616       _swrast_DestroyContext (&intel->ctx);
 617       intel->Fallback = 0;      /* don't call _swrast_Flush later */
 618       intel_batchbuffer_free(intel->batch);
 619       intel->batch = NULL;
 620
 621       if (intel->last_swap_fence) {
 622          dri_fence_wait(intel->last_swap_fence);
 623          dri_fence_unreference(intel->last_swap_fence);
 624          intel->last_swap_fence = NULL;
 625       }
 626       if (intel->first_swap_fence) {
 627          dri_fence_wait(intel->first_swap_fence);
 628          dri_fence_unreference(intel->first_swap_fence);
 629          intel->first_swap_fence = NULL;
 630       }
 631
 632       if ( release_texture_heaps ) {
 633          /* This share group is about to go away, free our private
 634           * texture object data.
 635           */
 636
 637          /* XXX: destroy the shared bufmgr struct here?
 638           */
 639       }
 640
 641       /* free the Mesa context */
 642       intel->ctx.VertexProgram.Current = NULL;
 643       intel->ctx.FragmentProgram.Current = NULL;
 644       _mesa_destroy_context(&intel->ctx);
 645    }
 646
 647    driContextPriv->driverPrivate = NULL;
 648 }
 649
 650 GLboolean intelUnbindContext(__DRIcontextPrivate *driContextPriv)
 651 {
 652    return GL_TRUE;
 653 }
 654
 655 GLboolean intelMakeCurrent(__DRIcontextPrivate *driContextPriv,
 656                           __DRIdrawablePrivate *driDrawPriv,
 657                           __DRIdrawablePrivate *driReadPriv)
 658 {
 659
 660    if (driContextPriv) {
 661       struct intel_context *intel =
 662          (struct intel_context *) driContextPriv->driverPrivate;
 663       struct intel_framebuffer *intel_fb =
 664          (struct intel_framebuffer *) driDrawPriv->driverPrivate;
 665       GLframebuffer *readFb = (GLframebuffer *) driReadPriv->driverPrivate;
 666
 667       /* XXX FBO temporary fix-ups! */
 668       /* if the renderbuffers don't have regions, init them from the context.
 669        * They will be unreferenced when the renderbuffer is destroyed.
 670        */
 671       {
 672          struct intel_renderbuffer *irbDepth
 673             = intel_get_renderbuffer(&intel_fb->Base, BUFFER_DEPTH);
 674          struct intel_renderbuffer *irbStencil
 675             = intel_get_renderbuffer(&intel_fb->Base, BUFFER_STENCIL);
 676
 677          if (intel_fb->color_rb[0] && !intel_fb->color_rb[0]->region) {
 678             intel_region_reference(&intel_fb->color_rb[0]->region,
 679                                    intel->front_region);
 680          }
 681          if (intel_fb->color_rb[1] && !intel_fb->color_rb[1]->region) {
 682             intel_region_reference(&intel_fb->color_rb[1]->region,
 683                                    intel->back_region);
 684          }
 685          if (intel_fb->color_rb[2] && !intel_fb->color_rb[2]->region) {
 686             intel_region_reference(&intel_fb->color_rb[2]->region,
 687                                    intel->third_region);
 688          }
 689          if (irbDepth && !irbDepth->region) {
 690             intel_region_reference(&irbDepth->region, intel->depth_region);
 691          }
 692          if (irbStencil && !irbStencil->region) {
 693             intel_region_reference(&irbStencil->region, intel->depth_region);
 694          }
 695       }
 696
 697       /* set GLframebuffer size to match window, if needed */
 698       driUpdateFramebufferSize(&intel->ctx, driDrawPriv);
 699
 700       if (intel->driReadDrawable != driReadPriv) {
 701           intel->driReadDrawable = driReadPriv;
 702       }
 703
 704       if ( intel->driDrawable != driDrawPriv ) {
 705          if (driDrawPriv->swap_interval == (unsigned)-1) {
 706             driDrawPriv->vblFlags = (intel->intelScreen->irq_active != 0)
 707                ? driGetDefaultVBlankFlags(&intel->optionCache)
 708                : VBLANK_FLAG_NO_IRQ;
 709             driDrawableInitVBlank( driDrawPriv );
 710          }
 711
 712          intel->driDrawable = driDrawPriv;
 713          intelWindowMoved( intel );
 714          /* Shouldn't the readbuffer be stored also? */
 715       }
 716
 717       _mesa_make_current(&intel->ctx,
 718                          &intel_fb->Base,
 719                          readFb);
 720
 721       intel_draw_buffer(&intel->ctx, &intel_fb->Base);
 722    } else {
 723       _mesa_make_current(NULL, NULL, NULL);
 724    }
 725
 726    return GL_TRUE;
 727 }
 728
 729
 730 static void intelContendedLock( struct intel_context *intel, GLuint flags )
 731 {
 732    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 733    __DRIscreenPrivate *sPriv = intel->driScreen;
 734    volatile drmI830Sarea * sarea = intel->sarea;
 735    int me = intel->hHWContext;
 736
 737    drmGetLock(intel->driFd, intel->hHWContext, flags);
 738
 739    /* If the window moved, may need to set a new cliprect now.
 740     *
 741     * NOTE: This releases and regains the hw lock, so all state
 742     * checking must be done *after* this call:
 743     */
 744    if (dPriv)
 745       DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 746
 747
 748    intel->locked = 1;
 749    intel->need_flush = 1;
 750
 751    /* Lost context?
 752     */
 753    if (sarea->ctxOwner != me) {
 754       if (INTEL_DEBUG & DEBUG_BUFMGR) {
 755          fprintf(stderr, "Lost Context: sarea->ctxOwner %x me %x\n",
 756                  sarea->ctxOwner, me);
 757       }
 758       sarea->ctxOwner = me;
 759       intel->vtbl.lost_hardware( intel );
 760    }
 761
 762    /* If the last consumer of the texture memory wasn't us, notify the fake
 763     * bufmgr and record the new owner.  We should have the memory shared
 764     * between contexts of a single fake bufmgr, but this will at least make
 765     * things correct for now.
 766     */
 767    if (!intel->ttm && sarea->texAge != intel->hHWContext) {
 768       sarea->texAge = intel->hHWContext;
 769       dri_bufmgr_fake_contended_lock_take(intel->bufmgr);
 770       if (INTEL_DEBUG & DEBUG_BATCH)
 771          intel_decode_context_reset();
 772       if (INTEL_DEBUG & DEBUG_BUFMGR) {
 773          fprintf(stderr, "Lost Textures: sarea->texAge %x hw context %x\n",
 774                  sarea->ctxOwner, intel->hHWContext);
 775       }
 776    }
 777
 778    /* Drawable changed?
 779     */
 780    if (dPriv && intel->lastStamp != dPriv->lastStamp) {
 781       intelWindowMoved( intel );
 782       intel->lastStamp = dPriv->lastStamp;
 783    }
 784 }
 785
 786 _glthread_DECLARE_STATIC_MUTEX(lockMutex);
 787
 788 /* Lock the hardware and validate our state.
 789  */
 790 void LOCK_HARDWARE( struct intel_context *intel )
 791 {
 792     char __ret=0;
 793
 794     _glthread_LOCK_MUTEX(lockMutex);
 795     assert(!intel->locked);
 796
 797
 798     DRM_CAS(intel->driHwLock, intel->hHWContext,
 799             (DRM_LOCK_HELD|intel->hHWContext), __ret);
 800     if (__ret)
 801         intelContendedLock( intel, 0 );
 802
 803    intel->locked = 1;
 804
 805 }
 806
 807
 808 /* Unlock the hardware using the global current context
 809  */
 810 void UNLOCK_HARDWARE( struct intel_context *intel )
 811 {
 812    intel->vtbl.note_unlock( intel );
 813    intel->locked = 0;
 814
 815    DRM_UNLOCK(intel->driFd, intel->driHwLock, intel->hHWContext);
 816    _glthread_UNLOCK_MUTEX(lockMutex);
 817 }
 818
 819