src/gallium/drivers/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 "brw_context.h"
  33 #include "brw_state.h"
  34 #include "brw_defines.h"
  35 #include "brw_winsys.h"
  36
  37 /* XXX: disabled true constant buffer functionality
  38  */
  39
  40
  41 /* Creates a new VS constant buffer reflecting the current VS program's
  42  * constants, if needed by the VS program.
  43  *
  44  * Otherwise, constants go through the CURBEs using the brw_constant_buffer
  45  * state atom.
  46  */
  47 #if 0
  48 static struct brw_winsys_buffer *
  49 brw_vs_update_constant_buffer(struct brw_context *brw)
  50 {
  51    /* XXX: true constant buffers
  52     */
  53    struct brw_vertex_program *vp =
  54       (struct brw_vertex_program *) brw->vertex_program;
  55    const struct gl_program_parameter_list *params = vp->program.Base.Parameters;
  56    const int size = params->NumParameters * 4 * sizeof(GLfloat);
  57    drm_intel_bo *const_buffer;
  58
  59    /* BRW_NEW_VERTEX_PROGRAM */
  60    if (!vp->use_const_buffer)
  61       return NULL;
  62
  63    const_buffer = brw->sws->bo_alloc(brw->sws,
  64                                      BRW_BUFFER_TYPE_SHADER_CONSTANTS,
  65                                      size, 64);
  66
  67    /* _NEW_PROGRAM_CONSTANTS */
  68    brw->sws->bo_subdata(const_buffer, 0, size, params->ParameterValues,
  69                         NULL, 0);
  70
  71    return const_buffer;
  72 }
  73 #endif
  74
  75 /**
  76  * Update the surface state for a VS constant buffer.
  77  *
  78  * Sets brw->vs.surf_bo[surf] and brw->vp->const_buffer.
  79  */
  80 #if 0
  81 static void
  82 brw_update_vs_constant_surface( struct brw_context *brw,
  83                                 GLuint surf)
  84 {
  85    struct brw_surface_key key;
  86    struct pipe_buffer *cb = brw->curr.vs_constants;
  87    enum pipe_error ret;
  88
  89    assert(surf == 0);
  90
  91    /* If we're in this state update atom, we need to update VS constants, so
  92     * free the old buffer and create a new one for the new contents.
  93     */
  94    ret = brw_vs_update_constant_buffer(brw, &vp->const_buffer);
  95    if (ret)
  96       return ret;
  97
  98    /* If there's no constant buffer, then no surface BO is needed to point at
  99     * it.
 100     */
 101    if (vp->const_buffer == NULL) {
 102       bo_reference(brw->vs.surf_bo[surf], NULL);
 103       return PIPE_OK;
 104    }
 105
 106    memset(&key, 0, sizeof(key));
 107
 108    key.format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 109    key.bo = vp->const_buffer;
 110    key.depthmode = GL_NONE;
 111    key.pitch = params->NumParameters;
 112    key.width = params->NumParameters;
 113    key.height = 1;
 114    key.depth = 1;
 115    key.cpp = 16;
 116
 117    /*
 118    printf("%s:\n", __FUNCTION__);
 119    printf("  width %d  height %d  depth %d  cpp %d  pitch %d\n",
 120           key.width, key.height, key.depth, key.cpp, key.pitch);
 121    */
 122
 123    if (brw_search_cache(&brw->surface_cache,
 124                         BRW_SS_SURFACE,
 125                         &key, sizeof(key),
 126                         &key.bo, key.bo ? 1 : 0,
 127                         NULL,
 128                         &brw->vs.surf_bo[surf]))
 129       return PIPE_OK;
 130
 131    ret = brw_create_constant_surface(brw, &key
 132                                      &brw->vs.surf_bo[surf]);
 133    if (ret)
 134       return ret;
 135
 136    return PIPE_OK;
 137 }
 138 #endif
 139
 140
 141 /**
 142  * Constructs the binding table for the VS surface state.
 143  */
 144 static enum pipe_error
 145 brw_vs_get_binding_table(struct brw_context *brw,
 146                          struct brw_winsys_buffer **bo_out)
 147 {
 148 #if 0
 149    static GLuint data[BRW_VS_MAX_SURF]; /* always zero */
 150    struct brw_winsys_reloc reloc[BRW_VS_MAX_SURF];
 151    int i;
 152
 153    /* Emit binding table relocations to surface state */
 154    for (i = 0; i < BRW_VS_MAX_SURF; i++) {
 155       make_reloc(&reloc[i],
 156                  BRW_USAGE_STATE,
 157                  0,
 158                  i * 4,
 159                  brw->vs.surf_bo[i]);
 160    }
 161
 162    ret = brw_cache_data( &brw->surface_cache,
 163                          BRW_SS_SURF_BIND,
 164                          NULL, 0,
 165                          reloc, nr_reloc,
 166                          data, sizeof data,
 167                          NULL, NULL,
 168                          bo_out);
 169    if (ret)
 170       return ret;
 171
 172    FREE(data);
 173    return PIPE_OK;
 174 #else
 175    return PIPE_OK;
 176 #endif
 177 }
 178
 179 /**
 180  * Vertex shader surfaces (constant buffer).
 181  *
 182  * This consumes the state updates for the constant buffer needing
 183  * to be updated, and produces BRW_NEW_NR_VS_SURFACES for the VS unit and
 184  * CACHE_NEW_SURF_BIND for the binding table upload.
 185  */
 186 static enum pipe_error prepare_vs_surfaces(struct brw_context *brw )
 187 {
 188    enum pipe_error ret;
 189
 190 #if 0
 191    int i;
 192    int nr_surfaces = 0;
 193
 194    brw_update_vs_constant_surface(ctx, SURF_INDEX_VERT_CONST_BUFFER);
 195
 196    for (i = 0; i < BRW_VS_MAX_SURF; i++) {
 197       if (brw->vs.surf_bo[i] != NULL) {
 198          nr_surfaces = i + 1;
 199       }
 200    }
 201
 202    if (brw->vs.nr_surfaces != nr_surfaces) {
 203       brw->state.dirty.brw |= BRW_NEW_NR_VS_SURFACES;
 204       brw->vs.nr_surfaces = nr_surfaces;
 205    }
 206 #endif
 207
 208    /* Note that we don't end up updating the bind_bo if we don't have a
 209     * surface to be pointing at.  This should be relatively harmless, as it
 210     * just slightly increases our working set size.
 211     */
 212    if (brw->vs.nr_surfaces != 0) {
 213       ret = brw_vs_get_binding_table(brw, &brw->vs.bind_bo);
 214       if (ret)
 215          return ret;
 216    }
 217
 218    return PIPE_OK;
 219 }
 220
 221 const struct brw_tracked_state brw_vs_surfaces = {
 222    .dirty = {
 223       .mesa = (PIPE_NEW_VERTEX_CONSTANTS |
 224                PIPE_NEW_VERTEX_SHADER),
 225       .brw = 0,
 226       .cache = 0
 227    },
 228    .prepare = prepare_vs_surfaces,
 229 };
 230
 231
 232