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 "shader/prog_parameter.h"
  35
  36 #include "brw_context.h"
  37 #include "brw_state.h"
  38 #include "brw_defines.h"
  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 static drm_intel_bo *
  47 brw_vs_update_constant_buffer(struct brw_context *brw)
  48 {
  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    drm_intel_bo *const_buffer;
  55    int i;
  56
  57    /* BRW_NEW_VERTEX_PROGRAM */
  58    if (!vp->use_const_buffer)
  59       return NULL;
  60
  61    const_buffer = drm_intel_bo_alloc(intel->bufmgr, "vp_const_buffer",
  62                                      size, 64);
  63
  64    /* _NEW_PROGRAM_CONSTANTS */
  65
  66    /* Updates the ParamaterValues[i] pointers for all parameters of the
  67     * basic type of PROGRAM_STATE_VAR.
  68     */
  69    _mesa_load_state_parameters(&brw->intel.ctx, vp->program.Base.Parameters);
  70
  71    intel_bo_map_gtt_preferred(intel, const_buffer, GL_TRUE);
  72    for (i = 0; i < params->NumParameters; i++) {
  73       memcpy(const_buffer->virtual + i * 4 * sizeof(float),
  74              params->ParameterValues[i],
  75              4 * sizeof(float));
  76    }
  77    intel_bo_unmap_gtt_preferred(intel, const_buffer);
  78
  79    return const_buffer;
  80 }
  81
  82 /**
  83  * Update the surface state for a VS constant buffer.
  84  *
  85  * Sets brw->vs.surf_bo[surf] and brw->vp->const_buffer.
  86  */
  87 static void
  88 brw_update_vs_constant_surface( GLcontext *ctx,
  89                                 GLuint surf)
  90 {
  91    struct brw_context *brw = brw_context(ctx);
  92    struct brw_surface_key key;
  93    struct brw_vertex_program *vp =
  94       (struct brw_vertex_program *) brw->vertex_program;
  95    const struct gl_program_parameter_list *params = vp->program.Base.Parameters;
  96
  97    assert(surf == 0);
  98
  99    /* If we're in this state update atom, we need to update VS constants, so
 100     * free the old buffer and create a new one for the new contents.
 101     */
 102    dri_bo_unreference(vp->const_buffer);
 103    vp->const_buffer = brw_vs_update_constant_buffer(brw);
 104
 105    /* If there's no constant buffer, then no surface BO is needed to point at
 106     * it.
 107     */
 108    if (vp->const_buffer == 0) {
 109       drm_intel_bo_unreference(brw->vs.surf_bo[surf]);
 110       brw->vs.surf_bo[surf] = NULL;
 111       return;
 112    }
 113
 114    memset(&key, 0, sizeof(key));
 115
 116    key.format = MESA_FORMAT_RGBA_FLOAT32;
 117    key.internal_format = GL_RGBA;
 118    key.bo = vp->const_buffer;
 119    key.depthmode = GL_NONE;
 120    key.pitch = params->NumParameters;
 121    key.width = params->NumParameters;
 122    key.height = 1;
 123    key.depth = 1;
 124    key.cpp = 16;
 125
 126    /*
 127    printf("%s:\n", __FUNCTION__);
 128    printf("  width %d  height %d  depth %d  cpp %d  pitch %d\n",
 129           key.width, key.height, key.depth, key.cpp, key.pitch);
 130    */
 131
 132    drm_intel_bo_unreference(brw->vs.surf_bo[surf]);
 133    brw->vs.surf_bo[surf] = brw_search_cache(&brw->surface_cache,
 134                                             BRW_SS_SURFACE,
 135                                             &key, sizeof(key),
 136                                             &key.bo, key.bo ? 1 : 0,
 137                                             NULL);
 138    if (brw->vs.surf_bo[surf] == NULL) {
 139       brw->vs.surf_bo[surf] = brw_create_constant_surface(brw, &key);
 140    }
 141 }
 142
 143
 144 /**
 145  * Constructs the binding table for the VS surface state.
 146  */
 147 static dri_bo *
 148 brw_vs_get_binding_table(struct brw_context *brw)
 149 {
 150    dri_bo *bind_bo;
 151
 152    bind_bo = brw_search_cache(&brw->surface_cache, BRW_SS_SURF_BIND,
 153                               NULL, 0,
 154                               brw->vs.surf_bo, BRW_VS_MAX_SURF,
 155                               NULL);
 156
 157    if (bind_bo == NULL) {
 158       GLuint data_size = BRW_VS_MAX_SURF * sizeof(GLuint);
 159       uint32_t *data = malloc(data_size);
 160       int i;
 161
 162       for (i = 0; i < BRW_VS_MAX_SURF; i++)
 163          if (brw->vs.surf_bo[i])
 164             data[i] = brw->vs.surf_bo[i]->offset;
 165          else
 166             data[i] = 0;
 167
 168       bind_bo = brw_upload_cache( &brw->surface_cache, BRW_SS_SURF_BIND,
 169                                   NULL, 0,
 170                                   brw->vs.surf_bo, BRW_VS_MAX_SURF,
 171                                   data, data_size,
 172                                   NULL, NULL);
 173
 174       /* Emit binding table relocations to surface state */
 175       for (i = 0; i < BRW_VS_MAX_SURF; i++) {
 176          if (brw->vs.surf_bo[i] != NULL) {
 177             /* The presumed offsets were set in the data values for
 178              * brw_upload_cache.
 179              */
 180             drm_intel_bo_emit_reloc(bind_bo, i * 4,
 181                                     brw->vs.surf_bo[i], 0,
 182                                     I915_GEM_DOMAIN_INSTRUCTION, 0);
 183          }
 184       }
 185
 186       free(data);
 187    }
 188
 189    return bind_bo;
 190 }
 191
 192 /**
 193  * Vertex shader surfaces (constant buffer).
 194  *
 195  * This consumes the state updates for the constant buffer needing
 196  * to be updated, and produces BRW_NEW_NR_VS_SURFACES for the VS unit and
 197  * CACHE_NEW_SURF_BIND for the binding table upload.
 198  */
 199 static void prepare_vs_surfaces(struct brw_context *brw )
 200 {
 201    GLcontext *ctx = &brw->intel.ctx;
 202    int i;
 203    int nr_surfaces = 0;
 204
 205    brw_update_vs_constant_surface(ctx, SURF_INDEX_VERT_CONST_BUFFER);
 206
 207    for (i = 0; i < BRW_VS_MAX_SURF; i++) {
 208       if (brw->vs.surf_bo[i] != NULL) {
 209          nr_surfaces = i + 1;
 210       }
 211    }
 212
 213    if (brw->vs.nr_surfaces != nr_surfaces) {
 214       brw->state.dirty.brw |= BRW_NEW_NR_VS_SURFACES;
 215       brw->vs.nr_surfaces = nr_surfaces;
 216    }
 217
 218    /* Note that we don't end up updating the bind_bo if we don't have a
 219     * surface to be pointing at.  This should be relatively harmless, as it
 220     * just slightly increases our working set size.
 221     */
 222    if (brw->vs.nr_surfaces != 0) {
 223       dri_bo_unreference(brw->vs.bind_bo);
 224       brw->vs.bind_bo = brw_vs_get_binding_table(brw);
 225    }
 226 }
 227
 228 const struct brw_tracked_state brw_vs_surfaces = {
 229    .dirty = {
 230       .mesa = (_NEW_PROGRAM_CONSTANTS),
 231       .brw = (BRW_NEW_VERTEX_PROGRAM),
 232       .cache = 0
 233    },
 234    .prepare = prepare_vs_surfaces,
 235 };
 236
 237
 238