src/mesa/drivers/dri/i965/brw_vs_surface_state.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 #include "main/mtypes.h"
  33 #include "main/texstore.h"
  34 #include "program/prog_parameter.h"
  35
  36 #include "brw_context.h"
  37 #include "brw_state.h"
  38
  39 /* Creates a new VS constant buffer reflecting the current VS program's
  40  * constants, if needed by the VS program.
  41  *
  42  * Otherwise, constants go through the CURBEs using the brw_constant_buffer
  43  * state atom.
  44  */
  45 static void
  46 prepare_vs_constants(struct brw_context *brw)
  47 {
  48    struct gl_context *ctx = &brw->intel.ctx;
  49    struct intel_context *intel = &brw->intel;
  50    /* BRW_NEW_VERTEX_PROGRAM */
  51    struct brw_vertex_program *vp =
  52       (struct brw_vertex_program *) brw->vertex_program;
  53    const struct gl_program_parameter_list *params = vp->program.Base.Parameters;
  54    int i;
  55
  56    if (vp->program.IsNVProgram)
  57       _mesa_load_tracked_matrices(ctx);
  58
  59    /* Updates the ParamaterValues[i] pointers for all parameters of the
  60     * basic type of PROGRAM_STATE_VAR.
  61     */
  62    _mesa_load_state_parameters(&brw->intel.ctx, vp->program.Base.Parameters);
  63
  64    /* CACHE_NEW_VS_PROG */
  65    if (!brw->vs.prog_data->nr_pull_params) {
  66       if (brw->vs.const_bo) {
  67          drm_intel_bo_unreference(brw->vs.const_bo);
  68          brw->vs.const_bo = NULL;
  69          brw->state.dirty.brw |= BRW_NEW_VS_CONSTBUF;
  70       }
  71       return;
  72    }
  73
  74    /* _NEW_PROGRAM_CONSTANTS */
  75    drm_intel_bo_unreference(brw->vs.const_bo);
  76    brw->vs.const_bo = drm_intel_bo_alloc(intel->bufmgr, "vp_const_buffer",
  77                                          brw->vs.prog_data->nr_pull_params * 4,
  78                                          64);
  79
  80    drm_intel_gem_bo_map_gtt(brw->vs.const_bo);
  81    for (i = 0; i < brw->vs.prog_data->nr_pull_params; i++) {
  82       memcpy(brw->vs.const_bo->virtual + i * 4,
  83              brw->vs.prog_data->pull_param[i],
  84              4);
  85    }
  86
  87    if (0) {
  88       for (i = 0; i < params->NumParameters; i++) {
  89          float *row = (float *)brw->vs.const_bo->virtual + i * 4;
  90          printf("vs const surface %3d: %4.3f %4.3f %4.3f %4.3f\n",
  91                 i, row[0], row[1], row[2], row[3]);
  92       }
  93    }
  94
  95    drm_intel_gem_bo_unmap_gtt(brw->vs.const_bo);
  96    brw->state.dirty.brw |= BRW_NEW_VS_CONSTBUF;
  97 }
  98
  99 const struct brw_tracked_state brw_vs_constants = {
 100    .dirty = {
 101       .mesa = (_NEW_PROGRAM_CONSTANTS),
 102       .brw = (BRW_NEW_VERTEX_PROGRAM),
 103       .cache = CACHE_NEW_VS_PROG,
 104    },
 105    .prepare = prepare_vs_constants,
 106 };
 107
 108 /**
 109  * Update the surface state for a VS constant buffer.
 110  *
 111  * Sets brw->vs.surf_bo[surf] and brw->vp->const_buffer.
 112  */
 113 static void
 114 brw_update_vs_constant_surface( struct gl_context *ctx,
 115                                 GLuint surf)
 116 {
 117    struct brw_context *brw = brw_context(ctx);
 118    struct intel_context *intel = &brw->intel;
 119    struct brw_vertex_program *vp =
 120       (struct brw_vertex_program *) brw->vertex_program;
 121    const struct gl_program_parameter_list *params = vp->program.Base.Parameters;
 122
 123    assert(surf == 0);
 124
 125    /* If there's no constant buffer, then no surface BO is needed to point at
 126     * it.
 127     */
 128    if (brw->vs.const_bo == NULL) {
 129       brw->vs.surf_offset[surf] = 0;
 130       return;
 131    }
 132
 133    if (intel->gen >= 7) {
 134       gen7_create_constant_surface(brw, brw->vs.const_bo, params->NumParameters,
 135                                   &brw->vs.surf_offset[surf]);
 136    } else {
 137       brw_create_constant_surface(brw, brw->vs.const_bo, params->NumParameters,
 138                                   &brw->vs.surf_offset[surf]);
 139    }
 140 }
 141
 142
 143 static void
 144 prepare_vs_surfaces(struct brw_context *brw)
 145 {
 146    int nr_surfaces = 0;
 147
 148    if (brw->vs.const_bo) {
 149       brw_add_validated_bo(brw, brw->vs.const_bo);
 150       nr_surfaces = 1;
 151    }
 152
 153    if (brw->vs.nr_surfaces != nr_surfaces) {
 154       brw->state.dirty.brw |= BRW_NEW_NR_VS_SURFACES;
 155       brw->vs.nr_surfaces = nr_surfaces;
 156    }
 157 }
 158
 159 /**
 160  * Vertex shader surfaces (constant buffer).
 161  *
 162  * This consumes the state updates for the constant buffer needing
 163  * to be updated, and produces BRW_NEW_NR_VS_SURFACES for the VS unit and
 164  * CACHE_NEW_SURF_BIND for the binding table upload.
 165  */
 166 static void upload_vs_surfaces(struct brw_context *brw)
 167 {
 168    struct gl_context *ctx = &brw->intel.ctx;
 169    uint32_t *bind;
 170    int i;
 171
 172    /* BRW_NEW_NR_VS_SURFACES */
 173    if (brw->vs.nr_surfaces == 0) {
 174       if (brw->vs.bind_bo_offset) {
 175          brw->state.dirty.brw |= BRW_NEW_VS_BINDING_TABLE;
 176       }
 177       brw->vs.bind_bo_offset = 0;
 178       return;
 179    }
 180
 181    brw_update_vs_constant_surface(ctx, SURF_INDEX_VERT_CONST_BUFFER);
 182
 183    /* Might want to calculate nr_surfaces first, to avoid taking up so much
 184     * space for the binding table. (once we have vs samplers)
 185     */
 186    bind = brw_state_batch(brw, AUB_TRACE_SURFACE_STATE,
 187                           sizeof(uint32_t) * BRW_VS_MAX_SURF,
 188                           32, &brw->vs.bind_bo_offset);
 189
 190    for (i = 0; i < BRW_VS_MAX_SURF; i++) {
 191       /* BRW_NEW_VS_CONSTBUF */
 192       bind[i] = brw->vs.surf_offset[i];
 193    }
 194
 195    brw->state.dirty.brw |= BRW_NEW_VS_BINDING_TABLE;
 196 }
 197
 198 const struct brw_tracked_state brw_vs_surfaces = {
 199    .dirty = {
 200       .mesa = 0,
 201       .brw = (BRW_NEW_VS_CONSTBUF |
 202               BRW_NEW_NR_VS_SURFACES |
 203               BRW_NEW_BATCH),
 204       .cache = 0
 205    },
 206    .prepare = prepare_vs_surfaces,
 207    .emit = upload_vs_surfaces,
 208 };