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