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