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    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    const int size = params->NumParameters * 4 * sizeof(GLfloat);
  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    /* BRW_NEW_VERTEX_PROGRAM */
  65    if (!vp->use_const_buffer) {
  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                                          size, 64);
  78
  79    drm_intel_gem_bo_map_gtt(brw->vs.const_bo);
  80    for (i = 0; i < params->NumParameters; i++) {
  81       memcpy(brw->vs.const_bo->virtual + i * 4 * sizeof(float),
  82              params->ParameterValues[i],
  83              4 * sizeof(float));
  84    }
  85    drm_intel_gem_bo_unmap_gtt(brw->vs.const_bo);
  86    brw->state.dirty.brw |= BRW_NEW_VS_CONSTBUF;
  87 }
  88
  89 const struct brw_tracked_state brw_vs_constants = {
  90    .dirty = {
  91       .mesa = (_NEW_PROGRAM_CONSTANTS),
  92       .brw = (BRW_NEW_VERTEX_PROGRAM),
  93       .cache = 0
  94    },
  95    .prepare = prepare_vs_constants,
  96 };
  97
  98 /**
  99  * Update the surface state for a VS constant buffer.
 100  *
 101  * Sets brw->vs.surf_bo[surf] and brw->vp->const_buffer.
 102  */
 103 static void
 104 brw_update_vs_constant_surface( struct gl_context *ctx,
 105                                 GLuint surf)
 106 {
 107    struct brw_context *brw = brw_context(ctx);
 108    struct brw_vertex_program *vp =
 109       (struct brw_vertex_program *) brw->vertex_program;
 110    const struct gl_program_parameter_list *params = vp->program.Base.Parameters;
 111
 112    assert(surf == 0);
 113
 114    /* If there's no constant buffer, then no surface BO is needed to point at
 115     * it.
 116     */
 117    if (brw->vs.const_bo == NULL) {
 118       drm_intel_bo_unreference(brw->vs.surf_bo[surf]);
 119       brw->vs.surf_bo[surf] = NULL;
 120       return;
 121    }
 122
 123    brw_create_constant_surface(brw, brw->vs.const_bo, params->NumParameters,
 124                                &brw->vs.surf_bo[surf],
 125                                &brw->vs.surf_offset[surf]);
 126 }
 127
 128
 129 static void
 130 prepare_vs_surfaces(struct brw_context *brw)
 131 {
 132    int nr_surfaces = 0;
 133
 134    if (brw->vs.const_bo) {
 135       brw_add_validated_bo(brw, brw->vs.const_bo);
 136       nr_surfaces = 1;
 137    }
 138
 139    if (brw->vs.nr_surfaces != nr_surfaces) {
 140       brw->state.dirty.brw |= BRW_NEW_NR_VS_SURFACES;
 141       brw->vs.nr_surfaces = nr_surfaces;
 142    }
 143 }
 144
 145 /**
 146  * Vertex shader surfaces (constant buffer).
 147  *
 148  * This consumes the state updates for the constant buffer needing
 149  * to be updated, and produces BRW_NEW_NR_VS_SURFACES for the VS unit and
 150  * CACHE_NEW_SURF_BIND for the binding table upload.
 151  */
 152 static void upload_vs_surfaces(struct brw_context *brw)
 153 {
 154    struct gl_context *ctx = &brw->intel.ctx;
 155    uint32_t *bind;
 156    int i;
 157
 158    /* BRW_NEW_NR_VS_SURFACES */
 159    if (brw->vs.nr_surfaces == 0) {
 160       if (brw->vs.bind_bo) {
 161          drm_intel_bo_unreference(brw->vs.bind_bo);
 162          brw->vs.bind_bo = NULL;
 163          brw->state.dirty.brw |= BRW_NEW_BINDING_TABLE;
 164       }
 165       return;
 166    }
 167
 168    brw_update_vs_constant_surface(ctx, SURF_INDEX_VERT_CONST_BUFFER);
 169
 170    /* Might want to calculate nr_surfaces first, to avoid taking up so much
 171     * space for the binding table. (once we have vs samplers)
 172     */
 173    bind = brw_state_batch(brw, sizeof(uint32_t) * BRW_VS_MAX_SURF,
 174                           32, &brw->vs.bind_bo, &brw->vs.bind_bo_offset);
 175
 176    for (i = 0; i < BRW_VS_MAX_SURF; i++) {
 177       /* BRW_NEW_VS_CONSTBUF */
 178       if (brw->vs.surf_bo[i]) {
 179          bind[i] = brw->vs.surf_offset[i];
 180       } else {
 181          bind[i] = 0;
 182       }
 183    }
 184
 185    brw->state.dirty.brw |= BRW_NEW_BINDING_TABLE;
 186 }
 187
 188 const struct brw_tracked_state brw_vs_surfaces = {
 189    .dirty = {
 190       .mesa = 0,
 191       .brw = (BRW_NEW_VS_CONSTBUF |
 192               BRW_NEW_NR_VS_SURFACES |
 193               BRW_NEW_BATCH),
 194       .cache = 0
 195    },
 196    .prepare = prepare_vs_surfaces,
 197    .emit = upload_vs_surfaces,
 198 };