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