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    dri_bo_subdata(const_buffer, 0, size, params->ParameterValues);
  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_buffer *cb = brw->curr.vs_constants;
  86
  87    assert(surf == 0);
  88
  89    /* If we're in this state update atom, we need to update VS constants, so
  90     * free the old buffer and create a new one for the new contents.
  91     */
  92    brw->sws->bo_unreference(vp->const_buffer);
  93    vp->const_buffer = brw_vs_update_constant_buffer(brw);
  94
  95    /* If there's no constant buffer, then no surface BO is needed to point at
  96     * it.
  97     */
  98    if (vp->const_buffer == 0) {
  99       drm_intel_bo_unreference(brw->vs.surf_bo[surf]);
 100       brw->vs.surf_bo[surf] = NULL;
 101       return;
 102    }
 103
 104    memset(&key, 0, sizeof(key));
 105
 106    key.format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 107    key.bo = vp->const_buffer;
 108    key.depthmode = GL_NONE;
 109    key.pitch = params->NumParameters;
 110    key.width = params->NumParameters;
 111    key.height = 1;
 112    key.depth = 1;
 113    key.cpp = 16;
 114
 115    /*
 116    printf("%s:\n", __FUNCTION__);
 117    printf("  width %d  height %d  depth %d  cpp %d  pitch %d\n",
 118           key.width, key.height, key.depth, key.cpp, key.pitch);
 119    */
 120
 121    drm_intel_bo_unreference(brw->vs.surf_bo[surf]);
 122    brw->vs.surf_bo[surf] = brw_search_cache(&brw->surface_cache,
 123                                             BRW_SS_SURFACE,
 124                                             &key, sizeof(key),
 125                                             &key.bo, key.bo ? 1 : 0,
 126                                             NULL);
 127    if (brw->vs.surf_bo[surf] == NULL) {
 128       brw->vs.surf_bo[surf] = brw_create_constant_surface(brw, &key);
 129    }
 130 }
 131 #endif
 132
 133
 134 /**
 135  * Constructs the binding table for the VS surface state.
 136  */
 137 static struct brw_winsys_buffer *
 138 brw_vs_get_binding_table(struct brw_context *brw)
 139 {
 140 #if 0
 141    struct brw_winsys_buffer *bind_bo;
 142
 143    bind_bo = brw_search_cache(&brw->surface_cache, BRW_SS_SURF_BIND,
 144                               NULL, 0,
 145                               brw->vs.surf_bo, BRW_VS_MAX_SURF,
 146                               NULL);
 147
 148    if (bind_bo == NULL) {
 149       GLuint data_size = BRW_VS_MAX_SURF * sizeof(GLuint);
 150       uint32_t *data = malloc(data_size);
 151       int i;
 152
 153       for (i = 0; i < BRW_VS_MAX_SURF; i++)
 154          if (brw->vs.surf_bo[i])
 155             data[i] = brw->vs.surf_bo[i]->offset;
 156          else
 157             data[i] = 0;
 158
 159       bind_bo = brw_upload_cache( &brw->surface_cache, BRW_SS_SURF_BIND,
 160                                   NULL, 0,
 161                                   brw->vs.surf_bo, BRW_VS_MAX_SURF,
 162                                   data, data_size,
 163                                   NULL, NULL);
 164
 165       /* Emit binding table relocations to surface state */
 166       for (i = 0; i < BRW_VS_MAX_SURF; i++) {
 167          if (brw->vs.surf_bo[i] != NULL) {
 168             /* The presumed offsets were set in the data values for
 169              * brw_upload_cache.
 170              */
 171             drm_intel_bo_emit_reloc(bind_bo, i * 4,
 172                                     brw->vs.surf_bo[i], 0,
 173                                     I915_GEM_DOMAIN_INSTRUCTION, 0);
 174          }
 175       }
 176
 177       free(data);
 178    }
 179
 180    return bind_bo;
 181 #else
 182    return NULL;
 183 #endif
 184 }
 185
 186 /**
 187  * Vertex shader surfaces (constant buffer).
 188  *
 189  * This consumes the state updates for the constant buffer needing
 190  * to be updated, and produces BRW_NEW_NR_VS_SURFACES for the VS unit and
 191  * CACHE_NEW_SURF_BIND for the binding table upload.
 192  */
 193 static int prepare_vs_surfaces(struct brw_context *brw )
 194 {
 195 #if 0
 196    int i;
 197    int nr_surfaces = 0;
 198
 199    brw_update_vs_constant_surface(ctx, SURF_INDEX_VERT_CONST_BUFFER);
 200
 201    for (i = 0; i < BRW_VS_MAX_SURF; i++) {
 202       if (brw->vs.surf_bo[i] != NULL) {
 203          nr_surfaces = i + 1;
 204       }
 205    }
 206
 207    if (brw->vs.nr_surfaces != nr_surfaces) {
 208       brw->state.dirty.brw |= BRW_NEW_NR_VS_SURFACES;
 209       brw->vs.nr_surfaces = nr_surfaces;
 210    }
 211 #endif
 212
 213    /* Note that we don't end up updating the bind_bo if we don't have a
 214     * surface to be pointing at.  This should be relatively harmless, as it
 215     * just slightly increases our working set size.
 216     */
 217    if (brw->vs.nr_surfaces != 0) {
 218       brw->sws->bo_unreference(brw->vs.bind_bo);
 219       brw->vs.bind_bo = brw_vs_get_binding_table(brw);
 220    }
 221
 222    return 0;
 223 }
 224
 225 const struct brw_tracked_state brw_vs_surfaces = {
 226    .dirty = {
 227       .mesa = (PIPE_NEW_VERTEX_CONSTANTS |
 228                PIPE_NEW_VERTEX_SHADER),
 229       .brw = 0,
 230       .cache = 0
 231    },
 232    .prepare = prepare_vs_surfaces,
 233 };
 234
 235
 236