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
  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    GLcontext *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( GLcontext *ctx,
 105                                 GLuint surf)
 106 {
 107    struct brw_context *brw = brw_context(ctx);
 108    struct brw_surface_key key;
 109    struct brw_vertex_program *vp =
 110       (struct brw_vertex_program *) brw->vertex_program;
 111    const struct gl_program_parameter_list *params = vp->program.Base.Parameters;
 112
 113    assert(surf == 0);
 114
 115    /* If there's no constant buffer, then no surface BO is needed to point at
 116     * it.
 117     */
 118    if (brw->vs.const_bo == NULL) {
 119       drm_intel_bo_unreference(brw->vs.surf_bo[surf]);
 120       brw->vs.surf_bo[surf] = NULL;
 121       return;
 122    }
 123
 124    memset(&key, 0, sizeof(key));
 125
 126    key.format = MESA_FORMAT_RGBA_FLOAT32;
 127    key.internal_format = GL_RGBA;
 128    key.bo = brw->vs.const_bo;
 129    key.depthmode = GL_NONE;
 130    key.pitch = params->NumParameters;
 131    key.width = params->NumParameters;
 132    key.height = 1;
 133    key.depth = 1;
 134    key.cpp = 16;
 135
 136    /*
 137    printf("%s:\n", __FUNCTION__);
 138    printf("  width %d  height %d  depth %d  cpp %d  pitch %d\n",
 139           key.width, key.height, key.depth, key.cpp, key.pitch);
 140    */
 141
 142    drm_intel_bo_unreference(brw->vs.surf_bo[surf]);
 143    brw->vs.surf_bo[surf] = brw_search_cache(&brw->surface_cache,
 144                                             BRW_SS_SURFACE,
 145                                             &key, sizeof(key),
 146                                             &key.bo, 1,
 147                                             NULL);
 148    if (brw->vs.surf_bo[surf] == NULL) {
 149       brw->vs.surf_bo[surf] = brw_create_constant_surface(brw, &key);
 150    }
 151 }
 152
 153
 154 /**
 155  * Constructs the binding table for the VS surface state.
 156  */
 157 static drm_intel_bo *
 158 brw_vs_get_binding_table(struct brw_context *brw)
 159 {
 160    drm_intel_bo *bind_bo;
 161
 162    bind_bo = brw_search_cache(&brw->surface_cache, BRW_SS_SURF_BIND,
 163                               NULL, 0,
 164                               brw->vs.surf_bo, BRW_VS_MAX_SURF,
 165                               NULL);
 166
 167    if (bind_bo == NULL) {
 168       GLuint data_size = BRW_VS_MAX_SURF * sizeof(GLuint);
 169       uint32_t data[BRW_VS_MAX_SURF];
 170       int i;
 171
 172       for (i = 0; i < BRW_VS_MAX_SURF; i++)
 173          if (brw->vs.surf_bo[i])
 174             data[i] = brw->vs.surf_bo[i]->offset;
 175          else
 176             data[i] = 0;
 177
 178       bind_bo = brw_upload_cache( &brw->surface_cache, BRW_SS_SURF_BIND,
 179                                   NULL, 0,
 180                                   brw->vs.surf_bo, BRW_VS_MAX_SURF,
 181                                   data, data_size);
 182
 183       /* Emit binding table relocations to surface state */
 184       for (i = 0; i < BRW_VS_MAX_SURF; i++) {
 185          if (brw->vs.surf_bo[i] != NULL) {
 186             /* The presumed offsets were set in the data values for
 187              * brw_upload_cache.
 188              */
 189             drm_intel_bo_emit_reloc(bind_bo, i * 4,
 190                                     brw->vs.surf_bo[i], 0,
 191                                     I915_GEM_DOMAIN_INSTRUCTION, 0);
 192          }
 193       }
 194    }
 195
 196    return bind_bo;
 197 }
 198
 199 /**
 200  * Vertex shader surfaces (constant buffer).
 201  *
 202  * This consumes the state updates for the constant buffer needing
 203  * to be updated, and produces BRW_NEW_NR_VS_SURFACES for the VS unit and
 204  * CACHE_NEW_SURF_BIND for the binding table upload.
 205  */
 206 static void prepare_vs_surfaces(struct brw_context *brw )
 207 {
 208    GLcontext *ctx = &brw->intel.ctx;
 209    int i;
 210    int nr_surfaces = 0;
 211
 212    brw_update_vs_constant_surface(ctx, SURF_INDEX_VERT_CONST_BUFFER);
 213
 214    for (i = 0; i < BRW_VS_MAX_SURF; i++) {
 215       if (brw->vs.surf_bo[i] != NULL) {
 216          nr_surfaces = i + 1;
 217       }
 218    }
 219
 220    if (brw->vs.nr_surfaces != nr_surfaces) {
 221       brw->state.dirty.brw |= BRW_NEW_NR_VS_SURFACES;
 222       brw->vs.nr_surfaces = nr_surfaces;
 223    }
 224
 225    /* Note that we don't end up updating the bind_bo if we don't have a
 226     * surface to be pointing at.  This should be relatively harmless, as it
 227     * just slightly increases our working set size.
 228     */
 229    if (brw->vs.nr_surfaces != 0) {
 230       drm_intel_bo_unreference(brw->vs.bind_bo);
 231       brw->vs.bind_bo = brw_vs_get_binding_table(brw);
 232    }
 233 }
 234
 235 const struct brw_tracked_state brw_vs_surfaces = {
 236    .dirty = {
 237       .mesa = 0,
 238       .brw = (BRW_NEW_VS_CONSTBUF),
 239       .cache = 0
 240    },
 241    .prepare = prepare_vs_surfaces,
 242 };
 243
 244
 245