src/mesa/drivers/dri/i965/brw_context.c

   1 /*
   2  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
   3  Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
   4  develop this 3D driver.
   5
   6  Permission is hereby granted, free of charge, to any person obtaining
   7  a 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, sublicense, 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
  16  portions of the Software.
  17
  18  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26  **********************************************************************/
  27  /*
  28   * Authors:
  29   *   Keith Whitwell <keith@tungstengraphics.com>
  30   */
  31
  32
  33 #include "main/api_exec.h"
  34 #include "main/imports.h"
  35 #include "main/macros.h"
  36 #include "main/points.h"
  37 #include "main/simple_list.h"
  38 #include "main/version.h"
  39 #include "main/vtxfmt.h"
  40
  41 #include "vbo/vbo_context.h"
  42
  43 #include "brw_context.h"
  44 #include "brw_defines.h"
  45 #include "brw_draw.h"
  46 #include "brw_state.h"
  47
  48 #include "intel_fbo.h"
  49 #include "intel_mipmap_tree.h"
  50 #include "intel_regions.h"
  51 #include "intel_tex.h"
  52 #include "intel_tex_obj.h"
  53
  54 #include "tnl/t_pipeline.h"
  55 #include "glsl/ralloc.h"
  56
  57 /***************************************
  58  * Mesa's Driver Functions
  59  ***************************************/
  60
  61 static size_t
  62 brw_query_samples_for_format(struct gl_context *ctx, GLenum target,
  63                              GLenum internalFormat, int samples[16])
  64 {
  65    struct brw_context *brw = brw_context(ctx);
  66
  67    (void) target;
  68
  69    switch (brw->gen) {
  70    case 7:
  71       samples[0] = 8;
  72       samples[1] = 4;
  73       return 2;
  74
  75    case 6:
  76       samples[0] = 4;
  77       return 1;
  78
  79    default:
  80       samples[0] = 1;
  81       return 1;
  82    }
  83 }
  84
  85 static void brwInitDriverFunctions(struct intel_screen *screen,
  86                                    struct dd_function_table *functions)
  87 {
  88    intelInitDriverFunctions( functions );
  89
  90    brwInitFragProgFuncs( functions );
  91    brw_init_common_queryobj_functions(functions);
  92    if (screen->gen >= 6)
  93       gen6_init_queryobj_functions(functions);
  94    else
  95       gen4_init_queryobj_functions(functions);
  96
  97    functions->QuerySamplesForFormat = brw_query_samples_for_format;
  98
  99    if (screen->gen >= 7) {
 100       functions->BeginTransformFeedback = gen7_begin_transform_feedback;
 101       functions->EndTransformFeedback = gen7_end_transform_feedback;
 102    } else {
 103       functions->BeginTransformFeedback = brw_begin_transform_feedback;
 104       functions->EndTransformFeedback = brw_end_transform_feedback;
 105    }
 106
 107    if (screen->gen >= 6)
 108       functions->GetSamplePosition = gen6_get_sample_position;
 109 }
 110
 111 static void
 112 brw_initialize_context_constants(struct brw_context *brw)
 113 {
 114    struct gl_context *ctx = &brw->ctx;
 115
 116    ctx->Const.QueryCounterBits.Timestamp = 36;
 117
 118    ctx->Const.StripTextureBorder = true;
 119
 120    ctx->Const.MaxDualSourceDrawBuffers = 1;
 121    ctx->Const.MaxDrawBuffers = BRW_MAX_DRAW_BUFFERS;
 122    ctx->Const.FragmentProgram.MaxTextureImageUnits = BRW_MAX_TEX_UNIT;
 123    ctx->Const.MaxTextureCoordUnits = 8; /* Mesa limit */
 124    ctx->Const.MaxTextureUnits =
 125       MIN2(ctx->Const.MaxTextureCoordUnits,
 126            ctx->Const.FragmentProgram.MaxTextureImageUnits);
 127    ctx->Const.VertexProgram.MaxTextureImageUnits = BRW_MAX_TEX_UNIT;
 128    ctx->Const.MaxCombinedTextureImageUnits =
 129       ctx->Const.VertexProgram.MaxTextureImageUnits +
 130       ctx->Const.FragmentProgram.MaxTextureImageUnits;
 131
 132    ctx->Const.MaxTextureLevels = 14; /* 8192 */
 133    if (ctx->Const.MaxTextureLevels > MAX_TEXTURE_LEVELS)
 134       ctx->Const.MaxTextureLevels = MAX_TEXTURE_LEVELS;
 135    ctx->Const.Max3DTextureLevels = 9;
 136    ctx->Const.MaxCubeTextureLevels = 12;
 137
 138    if (brw->gen >= 7)
 139       ctx->Const.MaxArrayTextureLayers = 2048;
 140    else
 141       ctx->Const.MaxArrayTextureLayers = 512;
 142
 143    ctx->Const.MaxTextureRectSize = 1 << 12;
 144
 145    ctx->Const.MaxTextureMaxAnisotropy = 16.0;
 146
 147    ctx->Const.MaxRenderbufferSize = 8192;
 148
 149    /* Hardware only supports a limited number of transform feedback buffers.
 150     * So we need to override the Mesa default (which is based only on software
 151     * limits).
 152     */
 153    ctx->Const.MaxTransformFeedbackBuffers = BRW_MAX_SOL_BUFFERS;
 154
 155    /* On Gen6, in the worst case, we use up one binding table entry per
 156     * transform feedback component (see comments above the definition of
 157     * BRW_MAX_SOL_BINDINGS, in brw_context.h), so we need to advertise a value
 158     * for MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS equal to
 159     * BRW_MAX_SOL_BINDINGS.
 160     *
 161     * In "separate components" mode, we need to divide this value by
 162     * BRW_MAX_SOL_BUFFERS, so that the total number of binding table entries
 163     * used up by all buffers will not exceed BRW_MAX_SOL_BINDINGS.
 164     */
 165    ctx->Const.MaxTransformFeedbackInterleavedComponents = BRW_MAX_SOL_BINDINGS;
 166    ctx->Const.MaxTransformFeedbackSeparateComponents =
 167       BRW_MAX_SOL_BINDINGS / BRW_MAX_SOL_BUFFERS;
 168
 169    if (brw->gen == 6) {
 170       ctx->Const.MaxSamples = 4;
 171       ctx->Const.MaxColorTextureSamples = 4;
 172       ctx->Const.MaxDepthTextureSamples = 4;
 173       ctx->Const.MaxIntegerSamples = 4;
 174    } else if (brw->gen >= 7) {
 175       ctx->Const.MaxSamples = 8;
 176       ctx->Const.MaxColorTextureSamples = 8;
 177       ctx->Const.MaxDepthTextureSamples = 8;
 178       ctx->Const.MaxIntegerSamples = 8;
 179    }
 180
 181    ctx->Const.MinLineWidth = 1.0;
 182    ctx->Const.MinLineWidthAA = 1.0;
 183    ctx->Const.MaxLineWidth = 5.0;
 184    ctx->Const.MaxLineWidthAA = 5.0;
 185    ctx->Const.LineWidthGranularity = 0.5;
 186
 187    ctx->Const.MinPointSize = 1.0;
 188    ctx->Const.MinPointSizeAA = 1.0;
 189    ctx->Const.MaxPointSize = 255.0;
 190    ctx->Const.MaxPointSizeAA = 255.0;
 191    ctx->Const.PointSizeGranularity = 1.0;
 192
 193    if (brw->gen >= 5 || brw->is_g4x)
 194       ctx->Const.MaxClipPlanes = 8;
 195
 196    ctx->Const.VertexProgram.MaxNativeInstructions = 16 * 1024;
 197    ctx->Const.VertexProgram.MaxAluInstructions = 0;
 198    ctx->Const.VertexProgram.MaxTexInstructions = 0;
 199    ctx->Const.VertexProgram.MaxTexIndirections = 0;
 200    ctx->Const.VertexProgram.MaxNativeAluInstructions = 0;
 201    ctx->Const.VertexProgram.MaxNativeTexInstructions = 0;
 202    ctx->Const.VertexProgram.MaxNativeTexIndirections = 0;
 203    ctx->Const.VertexProgram.MaxNativeAttribs = 16;
 204    ctx->Const.VertexProgram.MaxNativeTemps = 256;
 205    ctx->Const.VertexProgram.MaxNativeAddressRegs = 1;
 206    ctx->Const.VertexProgram.MaxNativeParameters = 1024;
 207    ctx->Const.VertexProgram.MaxEnvParams =
 208       MIN2(ctx->Const.VertexProgram.MaxNativeParameters,
 209            ctx->Const.VertexProgram.MaxEnvParams);
 210
 211    ctx->Const.FragmentProgram.MaxNativeInstructions = 1024;
 212    ctx->Const.FragmentProgram.MaxNativeAluInstructions = 1024;
 213    ctx->Const.FragmentProgram.MaxNativeTexInstructions = 1024;
 214    ctx->Const.FragmentProgram.MaxNativeTexIndirections = 1024;
 215    ctx->Const.FragmentProgram.MaxNativeAttribs = 12;
 216    ctx->Const.FragmentProgram.MaxNativeTemps = 256;
 217    ctx->Const.FragmentProgram.MaxNativeAddressRegs = 0;
 218    ctx->Const.FragmentProgram.MaxNativeParameters = 1024;
 219    ctx->Const.FragmentProgram.MaxEnvParams =
 220       MIN2(ctx->Const.FragmentProgram.MaxNativeParameters,
 221            ctx->Const.FragmentProgram.MaxEnvParams);
 222
 223    /* Fragment shaders use real, 32-bit twos-complement integers for all
 224     * integer types.
 225     */
 226    ctx->Const.FragmentProgram.LowInt.RangeMin = 31;
 227    ctx->Const.FragmentProgram.LowInt.RangeMax = 30;
 228    ctx->Const.FragmentProgram.LowInt.Precision = 0;
 229    ctx->Const.FragmentProgram.HighInt = ctx->Const.FragmentProgram.LowInt;
 230    ctx->Const.FragmentProgram.MediumInt = ctx->Const.FragmentProgram.LowInt;
 231
 232    /* Gen6 converts quads to polygon in beginning of 3D pipeline,
 233     * but we're not sure how it's actually done for vertex order,
 234     * that affect provoking vertex decision. Always use last vertex
 235     * convention for quad primitive which works as expected for now.
 236     */
 237    if (brw->gen >= 6)
 238       ctx->Const.QuadsFollowProvokingVertexConvention = false;
 239
 240    ctx->Const.NativeIntegers = true;
 241    ctx->Const.UniformBooleanTrue = 1;
 242    ctx->Const.UniformBufferOffsetAlignment = 16;
 243
 244    ctx->Const.ForceGLSLExtensionsWarn =
 245       driQueryOptionb(&brw->optionCache, "force_glsl_extensions_warn");
 246
 247    ctx->Const.DisableGLSLLineContinuations =
 248       driQueryOptionb(&brw->optionCache, "disable_glsl_line_continuations");
 249
 250    /* We want the GLSL compiler to emit code that uses condition codes */
 251    for (int i = 0; i < MESA_SHADER_TYPES; i++) {
 252       ctx->ShaderCompilerOptions[i].MaxIfDepth = brw->gen < 6 ? 16 : UINT_MAX;
 253       ctx->ShaderCompilerOptions[i].EmitCondCodes = true;
 254       ctx->ShaderCompilerOptions[i].EmitNoNoise = true;
 255       ctx->ShaderCompilerOptions[i].EmitNoMainReturn = true;
 256       ctx->ShaderCompilerOptions[i].EmitNoIndirectInput = true;
 257       ctx->ShaderCompilerOptions[i].EmitNoIndirectOutput = true;
 258
 259       ctx->ShaderCompilerOptions[i].EmitNoIndirectUniform =
 260          (i == MESA_SHADER_FRAGMENT);
 261       ctx->ShaderCompilerOptions[i].EmitNoIndirectTemp =
 262          (i == MESA_SHADER_FRAGMENT);
 263       ctx->ShaderCompilerOptions[i].LowerClipDistance = true;
 264    }
 265
 266    ctx->ShaderCompilerOptions[MESA_SHADER_VERTEX].PreferDP4 = true;
 267 }
 268
 269 bool
 270 brwCreateContext(int api,
 271                  const struct gl_config *mesaVis,
 272                  __DRIcontext *driContextPriv,
 273                  unsigned major_version,
 274                  unsigned minor_version,
 275                  uint32_t flags,
 276                  unsigned *error,
 277                  void *sharedContextPrivate)
 278 {
 279    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 280    struct intel_screen *screen = sPriv->driverPrivate;
 281    struct dd_function_table functions;
 282
 283    struct brw_context *brw = rzalloc(NULL, struct brw_context);
 284    if (!brw) {
 285       printf("%s: failed to alloc context\n", __FUNCTION__);
 286       *error = __DRI_CTX_ERROR_NO_MEMORY;
 287       return false;
 288    }
 289
 290    /* brwInitVtbl needs to know the chipset generation so that it can set the
 291     * right pointers.
 292     */
 293    brw->gen = screen->gen;
 294
 295    brwInitVtbl( brw );
 296
 297    brwInitDriverFunctions(screen, &functions);
 298
 299    struct gl_context *ctx = &brw->ctx;
 300
 301    if (!intelInitContext( brw, api, major_version, minor_version,
 302                           mesaVis, driContextPriv,
 303                           sharedContextPrivate, &functions,
 304                           error)) {
 305       ralloc_free(brw);
 306       return false;
 307    }
 308
 309    brw_initialize_context_constants(brw);
 310
 311    /* Reinitialize the context point state.  It depends on ctx->Const values. */
 312    _mesa_init_point(ctx);
 313
 314    if (brw->gen >= 6) {
 315       /* Create a new hardware context.  Using a hardware context means that
 316        * our GPU state will be saved/restored on context switch, allowing us
 317        * to assume that the GPU is in the same state we left it in.
 318        *
 319        * This is required for transform feedback buffer offsets, query objects,
 320        * and also allows us to reduce how much state we have to emit.
 321        */
 322       brw->hw_ctx = drm_intel_gem_context_create(brw->bufmgr);
 323
 324       if (!brw->hw_ctx) {
 325          fprintf(stderr, "Gen6+ requires Kernel 3.6 or later.\n");
 326          ralloc_free(brw);
 327          return false;
 328       }
 329    }
 330
 331    brw_init_surface_formats(brw);
 332
 333    /* Initialize swrast, tnl driver tables: */
 334    TNLcontext *tnl = TNL_CONTEXT(ctx);
 335    if (tnl)
 336       tnl->Driver.RunPipeline = _tnl_run_pipeline;
 337
 338    ctx->DriverFlags.NewTransformFeedback = BRW_NEW_TRANSFORM_FEEDBACK;
 339    ctx->DriverFlags.NewRasterizerDiscard = BRW_NEW_RASTERIZER_DISCARD;
 340    ctx->DriverFlags.NewUniformBuffer = BRW_NEW_UNIFORM_BUFFER;
 341
 342    if (brw->is_g4x || brw->gen >= 5) {
 343       brw->CMD_VF_STATISTICS = GM45_3DSTATE_VF_STATISTICS;
 344       brw->CMD_PIPELINE_SELECT = CMD_PIPELINE_SELECT_GM45;
 345       brw->has_surface_tile_offset = true;
 346       if (brw->gen < 6)
 347           brw->has_compr4 = true;
 348       brw->has_aa_line_parameters = true;
 349       brw->has_pln = true;
 350   } else {
 351       brw->CMD_VF_STATISTICS = GEN4_3DSTATE_VF_STATISTICS;
 352       brw->CMD_PIPELINE_SELECT = CMD_PIPELINE_SELECT_965;
 353    }
 354
 355    /* WM maximum threads is number of EUs times number of threads per EU. */
 356    assert(brw->gen <= 7);
 357
 358    if (brw->is_haswell) {
 359       if (brw->gt == 1) {
 360          brw->max_wm_threads = 102;
 361          brw->max_vs_threads = 70;
 362          brw->max_gs_threads = 70;
 363          brw->urb.size = 128;
 364          brw->urb.max_vs_entries = 640;
 365          brw->urb.max_gs_entries = 256;
 366       } else if (brw->gt == 2) {
 367          brw->max_wm_threads = 204;
 368          brw->max_vs_threads = 280;
 369          brw->max_gs_threads = 256;
 370          brw->urb.size = 256;
 371          brw->urb.max_vs_entries = 1664;
 372          brw->urb.max_gs_entries = 640;
 373       } else if (brw->gt == 3) {
 374          brw->max_wm_threads = 408;
 375          brw->max_vs_threads = 280;
 376          brw->max_gs_threads = 256;
 377          brw->urb.size = 512;
 378          brw->urb.max_vs_entries = 1664;
 379          brw->urb.max_gs_entries = 640;
 380       }
 381    } else if (brw->gen == 7) {
 382       if (brw->gt == 1) {
 383          brw->max_wm_threads = 48;
 384          brw->max_vs_threads = 36;
 385          brw->max_gs_threads = 36;
 386          brw->urb.size = 128;
 387          brw->urb.max_vs_entries = 512;
 388          brw->urb.max_gs_entries = 192;
 389       } else if (brw->gt == 2) {
 390          brw->max_wm_threads = 172;
 391          brw->max_vs_threads = 128;
 392          brw->max_gs_threads = 128;
 393          brw->urb.size = 256;
 394          brw->urb.max_vs_entries = 704;
 395          brw->urb.max_gs_entries = 320;
 396       } else {
 397          assert(!"Unknown gen7 device.");
 398       }
 399    } else if (brw->gen == 6) {
 400       if (brw->gt == 2) {
 401          brw->max_wm_threads = 80;
 402          brw->max_vs_threads = 60;
 403          brw->max_gs_threads = 60;
 404          brw->urb.size = 64;            /* volume 5c.5 section 5.1 */
 405          brw->urb.max_vs_entries = 256; /* volume 2a (see 3DSTATE_URB) */
 406          brw->urb.max_gs_entries = 256;
 407       } else {
 408          brw->max_wm_threads = 40;
 409          brw->max_vs_threads = 24;
 410          brw->max_gs_threads = 21; /* conservative; 24 if rendering disabled */
 411          brw->urb.size = 32;            /* volume 5c.5 section 5.1 */
 412          brw->urb.max_vs_entries = 256; /* volume 2a (see 3DSTATE_URB) */
 413          brw->urb.max_gs_entries = 256;
 414       }
 415       brw->urb.gen6_gs_previously_active = false;
 416    } else if (brw->gen == 5) {
 417       brw->urb.size = 1024;
 418       brw->max_vs_threads = 72;
 419       brw->max_gs_threads = 32;
 420       brw->max_wm_threads = 12 * 6;
 421    } else if (brw->is_g4x) {
 422       brw->urb.size = 384;
 423       brw->max_vs_threads = 32;
 424       brw->max_gs_threads = 2;
 425       brw->max_wm_threads = 10 * 5;
 426    } else if (brw->gen < 6) {
 427       brw->urb.size = 256;
 428       brw->max_vs_threads = 16;
 429       brw->max_gs_threads = 2;
 430       brw->max_wm_threads = 8 * 4;
 431       brw->has_negative_rhw_bug = true;
 432    }
 433
 434    if (brw->gen <= 7) {
 435       brw->needs_unlit_centroid_workaround = true;
 436    }
 437
 438    brw->prim_restart.in_progress = false;
 439    brw->prim_restart.enable_cut_index = false;
 440
 441    brw_init_state( brw );
 442
 443    if (brw->gen < 6) {
 444       brw->curbe.last_buf = calloc(1, 4096);
 445       brw->curbe.next_buf = calloc(1, 4096);
 446    }
 447
 448    brw->state.dirty.mesa = ~0;
 449    brw->state.dirty.brw = ~0;
 450
 451    /* Make sure that brw->state.dirty.brw has enough bits to hold all possible
 452     * dirty flags.
 453     */
 454    STATIC_ASSERT(BRW_NUM_STATE_BITS <= 8 * sizeof(brw->state.dirty.brw));
 455
 456    brw->emit_state_always = 0;
 457
 458    brw->batch.need_workaround_flush = true;
 459
 460    ctx->VertexProgram._MaintainTnlProgram = true;
 461    ctx->FragmentProgram._MaintainTexEnvProgram = true;
 462
 463    brw_draw_init( brw );
 464
 465    brw->precompile = driQueryOptionb(&brw->optionCache, "shader_precompile");
 466
 467    ctx->Const.ContextFlags = 0;
 468    if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0)
 469       ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
 470
 471    if ((flags & __DRI_CTX_FLAG_DEBUG) != 0) {
 472       ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_DEBUG_BIT;
 473
 474       /* Turn on some extra GL_ARB_debug_output generation. */
 475       brw->perf_debug = true;
 476    }
 477
 478    brw_fs_alloc_reg_sets(brw);
 479    brw_vec4_alloc_reg_set(brw);
 480
 481    if (INTEL_DEBUG & DEBUG_SHADER_TIME)
 482       brw_init_shader_time(brw);
 483
 484    _mesa_compute_version(ctx);
 485
 486    _mesa_initialize_dispatch_tables(ctx);
 487    _mesa_initialize_vbo_vtxfmt(ctx);
 488
 489    return true;
 490 }
 491