src/mesa/drivers/dri/i965/gen6_vs_state.c

   1 /*
   2  * Copyright © 2009 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Eric Anholt <eric@anholt.net>
  25  *
  26  */
  27
  28 #include "brw_context.h"
  29 #include "brw_state.h"
  30 #include "brw_defines.h"
  31 #include "brw_util.h"
  32 #include "program/prog_parameter.h"
  33 #include "program/prog_statevars.h"
  34 #include "intel_batchbuffer.h"
  35
  36 static void
  37 upload_vs_state(struct brw_context *brw)
  38 {
  39    struct intel_context *intel = &brw->intel;
  40    struct gl_context *ctx = &intel->ctx;
  41    const struct brw_vertex_program *vp =
  42       brw_vertex_program_const(brw->vertex_program);
  43    unsigned int nr_params = vp->program.Base.Parameters->NumParameters;
  44    drm_intel_bo *constant_bo;
  45    int i;
  46
  47    if (vp->use_const_buffer || (nr_params == 0 &&
  48                                 !ctx->Transform.ClipPlanesEnabled)) {
  49       /* Disable the push constant buffers. */
  50       BEGIN_BATCH(5);
  51       OUT_BATCH(CMD_3D_CONSTANT_VS_STATE << 16 | (5 - 2));
  52       OUT_BATCH(0);
  53       OUT_BATCH(0);
  54       OUT_BATCH(0);
  55       OUT_BATCH(0);
  56       ADVANCE_BATCH();
  57    } else {
  58       int params_uploaded = 0;
  59       float *param;
  60
  61       if (brw->vertex_program->IsNVProgram)
  62          _mesa_load_tracked_matrices(ctx);
  63
  64       /* Updates the ParamaterValues[i] pointers for all parameters of the
  65        * basic type of PROGRAM_STATE_VAR.
  66        */
  67       _mesa_load_state_parameters(ctx, vp->program.Base.Parameters);
  68
  69       constant_bo = drm_intel_bo_alloc(intel->bufmgr, "VS constant_bo",
  70                                        (MAX_CLIP_PLANES + nr_params) *
  71                                        4 * sizeof(float),
  72                                        4096);
  73       drm_intel_gem_bo_map_gtt(constant_bo);
  74       param = constant_bo->virtual;
  75
  76       /* This should be loaded like any other param, but it's ad-hoc
  77        * until we redo the VS backend.
  78        */
  79       for (i = 0; i < MAX_CLIP_PLANES; i++) {
  80          if (ctx->Transform.ClipPlanesEnabled & (1 << i)) {
  81             memcpy(param, ctx->Transform._ClipUserPlane[i], 4 * sizeof(float));
  82             param += 4;
  83             params_uploaded++;
  84          }
  85       }
  86       /* Align to a reg for convenience for brw_vs_emit.c */
  87       if (params_uploaded & 1) {
  88          param += 4;
  89          params_uploaded++;
  90       }
  91
  92       for (i = 0; i < nr_params; i++) {
  93          memcpy(param, vp->program.Base.Parameters->ParameterValues[i],
  94                 4 * sizeof(float));
  95          param += 4;
  96          params_uploaded++;
  97       }
  98
  99       if (0) {
 100          printf("VS constant buffer:\n");
 101          for (i = 0; i < params_uploaded; i++) {
 102             float *buf = (float *)constant_bo->virtual + i * 4;
 103             printf("%d: %f %f %f %f\n",
 104                    i, buf[0], buf[1], buf[2], buf[3]);
 105          }
 106       }
 107
 108       drm_intel_gem_bo_unmap_gtt(constant_bo);
 109
 110       BEGIN_BATCH(5);
 111       OUT_BATCH(CMD_3D_CONSTANT_VS_STATE << 16 |
 112                 GEN6_CONSTANT_BUFFER_0_ENABLE |
 113                 (5 - 2));
 114       OUT_RELOC(constant_bo,
 115                 I915_GEM_DOMAIN_RENDER, 0, /* XXX: bad domain */
 116                 ALIGN(params_uploaded, 2) / 2 - 1);
 117       OUT_BATCH(0);
 118       OUT_BATCH(0);
 119       OUT_BATCH(0);
 120       ADVANCE_BATCH();
 121
 122       drm_intel_bo_unreference(constant_bo);
 123    }
 124
 125    BEGIN_BATCH(6);
 126    OUT_BATCH(CMD_3D_VS_STATE << 16 | (6 - 2));
 127    OUT_RELOC(brw->vs.prog_bo, I915_GEM_DOMAIN_INSTRUCTION, 0, 0);
 128    OUT_BATCH(GEN6_VS_SPF_MODE | (0 << GEN6_VS_SAMPLER_COUNT_SHIFT) |
 129              (brw->vs.nr_surfaces << GEN6_VS_BINDING_TABLE_ENTRY_COUNT_SHIFT));
 130    OUT_BATCH(0); /* scratch space base offset */
 131    OUT_BATCH((1 << GEN6_VS_DISPATCH_START_GRF_SHIFT) |
 132              (brw->vs.prog_data->urb_read_length << GEN6_VS_URB_READ_LENGTH_SHIFT) |
 133              (0 << GEN6_VS_URB_ENTRY_READ_OFFSET_SHIFT));
 134    OUT_BATCH((0 << GEN6_VS_MAX_THREADS_SHIFT) |
 135              GEN6_VS_STATISTICS_ENABLE |
 136              GEN6_VS_ENABLE);
 137    ADVANCE_BATCH();
 138 }
 139
 140 const struct brw_tracked_state gen6_vs_state = {
 141    .dirty = {
 142       .mesa  = _NEW_TRANSFORM | _NEW_PROGRAM_CONSTANTS,
 143       .brw   = (BRW_NEW_CURBE_OFFSETS |
 144                 BRW_NEW_NR_VS_SURFACES |
 145                 BRW_NEW_URB_FENCE |
 146                 BRW_NEW_CONTEXT),
 147       .cache = CACHE_NEW_VS_PROG
 148    },
 149    .emit = upload_vs_state,
 150 };