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 = brw->vs.prog_data->nr_params / 4;
  44    drm_intel_bo *constant_bo;
  45    int i;
  46
  47    if (brw->vs.prog_data->nr_params == 0 && !ctx->Transform.ClipPlanesEnabled) {
  48       /* Disable the push constant buffers. */
  49       BEGIN_BATCH(5);
  50       OUT_BATCH(_3DSTATE_CONSTANT_VS << 16 | (5 - 2));
  51       OUT_BATCH(0);
  52       OUT_BATCH(0);
  53       OUT_BATCH(0);
  54       OUT_BATCH(0);
  55       ADVANCE_BATCH();
  56    } else {
  57       int params_uploaded = 0, param_regs;
  58       float *param;
  59
  60       if (brw->vertex_program->IsNVProgram)
  61          _mesa_load_tracked_matrices(ctx);
  62
  63       /* Updates the ParamaterValues[i] pointers for all parameters of the
  64        * basic type of PROGRAM_STATE_VAR.
  65        */
  66       _mesa_load_state_parameters(ctx, vp->program.Base.Parameters);
  67
  68       constant_bo = drm_intel_bo_alloc(intel->bufmgr, "VS constant_bo",
  69                                        (MAX_CLIP_PLANES + nr_params) *
  70                                        4 * sizeof(float),
  71                                        4096);
  72       drm_intel_gem_bo_map_gtt(constant_bo);
  73       param = constant_bo->virtual;
  74
  75       /* This should be loaded like any other param, but it's ad-hoc
  76        * until we redo the VS backend.
  77        */
  78       for (i = 0; i < MAX_CLIP_PLANES; i++) {
  79          if (ctx->Transform.ClipPlanesEnabled & (1 << i)) {
  80             memcpy(param, ctx->Transform._ClipUserPlane[i], 4 * sizeof(float));
  81             param += 4;
  82             params_uploaded++;
  83          }
  84       }
  85       /* Align to a reg for convenience for brw_vs_emit.c */
  86       if (params_uploaded & 1) {
  87          param += 4;
  88          params_uploaded++;
  89       }
  90
  91       for (i = 0; i < vp->program.Base.Parameters->NumParameters; i++) {
  92          if (brw->vs.constant_map[i] != -1) {
  93             memcpy(param + brw->vs.constant_map[i] * 4,
  94                    vp->program.Base.Parameters->ParameterValues[i],
  95                    4 * sizeof(float));
  96             params_uploaded++;
  97          }
  98       }
  99
 100       if (0) {
 101          printf("VS constant buffer:\n");
 102          for (i = 0; i < params_uploaded; i++) {
 103             float *buf = (float *)constant_bo->virtual + i * 4;
 104             printf("%d: %f %f %f %f\n",
 105                    i, buf[0], buf[1], buf[2], buf[3]);
 106          }
 107       }
 108
 109       drm_intel_gem_bo_unmap_gtt(constant_bo);
 110
 111       param_regs = (params_uploaded + 1) / 2;
 112       assert(param_regs <= 32);
 113
 114       BEGIN_BATCH(5);
 115       OUT_BATCH(_3DSTATE_CONSTANT_VS << 16 |
 116                 GEN6_CONSTANT_BUFFER_0_ENABLE |
 117                 (5 - 2));
 118       OUT_RELOC(constant_bo,
 119                 I915_GEM_DOMAIN_RENDER, 0, /* XXX: bad domain */
 120                 param_regs - 1);
 121       OUT_BATCH(0);
 122       OUT_BATCH(0);
 123       OUT_BATCH(0);
 124       ADVANCE_BATCH();
 125
 126       drm_intel_bo_unreference(constant_bo);
 127    }
 128
 129    BEGIN_BATCH(6);
 130    OUT_BATCH(_3DSTATE_VS << 16 | (6 - 2));
 131    OUT_RELOC(brw->vs.prog_bo, I915_GEM_DOMAIN_INSTRUCTION, 0, 0);
 132    OUT_BATCH((0 << GEN6_VS_SAMPLER_COUNT_SHIFT) |
 133              GEN6_VS_FLOATING_POINT_MODE_ALT |
 134              (brw->vs.nr_surfaces << GEN6_VS_BINDING_TABLE_ENTRY_COUNT_SHIFT));
 135    OUT_BATCH(0); /* scratch space base offset */
 136    OUT_BATCH((1 << GEN6_VS_DISPATCH_START_GRF_SHIFT) |
 137              (brw->vs.prog_data->urb_read_length << GEN6_VS_URB_READ_LENGTH_SHIFT) |
 138              (0 << GEN6_VS_URB_ENTRY_READ_OFFSET_SHIFT));
 139
 140    OUT_BATCH(((brw->vs_max_threads - 1) << GEN6_VS_MAX_THREADS_SHIFT) |
 141              GEN6_VS_STATISTICS_ENABLE |
 142              GEN6_VS_ENABLE);
 143    ADVANCE_BATCH();
 144 }
 145
 146 const struct brw_tracked_state gen6_vs_state = {
 147    .dirty = {
 148       .mesa  = _NEW_TRANSFORM | _NEW_PROGRAM_CONSTANTS,
 149       .brw   = (BRW_NEW_CURBE_OFFSETS |
 150                 BRW_NEW_NR_VS_SURFACES |
 151                 BRW_NEW_URB_FENCE |
 152                 BRW_NEW_CONTEXT),
 153       .cache = CACHE_NEW_VS_PROG
 154    },
 155    .emit = upload_vs_state,
 156 };