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 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 <keithw@vmware.com>
  30   */
  31
  32 #include "main/mtypes.h"
  33 #include "program/prog_parameter.h"
  34
  35 #include "brw_context.h"
  36 #include "brw_state.h"
  37 #include "intel_buffer_objects.h"
  38
  39 /**
  40  * Creates a temporary BO containing the pull constant data for the shader
  41  * stage, and the SURFACE_STATE struct that points at it.
  42  *
  43  * Pull constants are GLSL uniforms (and other constant data) beyond what we
  44  * could fit as push constants, or that have variable-index array access
  45  * (which is easiest to support using pull constants, and avoids filling
  46  * register space with mostly-unused data).
  47  *
  48  * Compare this path to brw_curbe.c for gen4/5 push constants, and
  49  * gen6_vs_state.c for gen6+ push constants.
  50  */
  51 void
  52 brw_upload_pull_constants(struct brw_context *brw,
  53                           GLbitfield brw_new_constbuf,
  54                           const struct gl_program *prog,
  55                           struct brw_stage_state *stage_state,
  56                           const struct brw_stage_prog_data *prog_data,
  57                           bool dword_pitch)
  58 {
  59    int i;
  60    uint32_t surf_index = prog_data->binding_table.pull_constants_start;
  61
  62    if (!prog_data->nr_pull_params) {
  63       if (stage_state->surf_offset[surf_index]) {
  64          stage_state->surf_offset[surf_index] = 0;
  65          brw->state.dirty.brw |= brw_new_constbuf;
  66       }
  67       return;
  68    }
  69
  70    /* Updates the ParamaterValues[i] pointers for all parameters of the
  71     * basic type of PROGRAM_STATE_VAR.
  72     */
  73    _mesa_load_state_parameters(&brw->ctx, prog->Parameters);
  74
  75    /* BRW_NEW_*_PROG_DATA | _NEW_PROGRAM_CONSTANTS */
  76    uint32_t size = prog_data->nr_pull_params * 4;
  77    drm_intel_bo *const_bo = NULL;
  78    uint32_t const_offset;
  79    gl_constant_value *constants = intel_upload_space(brw, size, 64,
  80                                                      &const_bo, &const_offset);
  81
  82    STATIC_ASSERT(sizeof(gl_constant_value) == sizeof(float));
  83
  84    for (i = 0; i < prog_data->nr_pull_params; i++) {
  85       constants[i] = *prog_data->pull_param[i];
  86    }
  87
  88    if (0) {
  89       for (i = 0; i < ALIGN(prog_data->nr_pull_params, 4) / 4; i++) {
  90          const gl_constant_value *row = &constants[i * 4];
  91          fprintf(stderr, "const surface %3d: %4.3f %4.3f %4.3f %4.3f\n",
  92                  i, row[0].f, row[1].f, row[2].f, row[3].f);
  93       }
  94    }
  95
  96    brw_create_constant_surface(brw, const_bo, const_offset, size,
  97                                &stage_state->surf_offset[surf_index],
  98                                dword_pitch);
  99    drm_intel_bo_unreference(const_bo);
 100
 101    brw->state.dirty.brw |= brw_new_constbuf;
 102 }
 103
 104
 105 /* Creates a new VS constant buffer reflecting the current VS program's
 106  * constants, if needed by the VS program.
 107  *
 108  * Otherwise, constants go through the CURBEs using the brw_constant_buffer
 109  * state atom.
 110  */
 111 static void
 112 brw_upload_vs_pull_constants(struct brw_context *brw)
 113 {
 114    struct brw_stage_state *stage_state = &brw->vs.base;
 115    bool dword_pitch;
 116
 117    /* BRW_NEW_VERTEX_PROGRAM */
 118    struct brw_vertex_program *vp =
 119       (struct brw_vertex_program *) brw->vertex_program;
 120
 121    /* BRW_NEW_VS_PROG_DATA */
 122    const struct brw_stage_prog_data *prog_data = &brw->vs.prog_data->base.base;
 123
 124    dword_pitch = brw->vs.prog_data->base.simd8;
 125
 126    /* _NEW_PROGRAM_CONSTANTS */
 127    brw_upload_pull_constants(brw, BRW_NEW_VS_CONSTBUF, &vp->program.Base,
 128                              stage_state, prog_data, dword_pitch);
 129 }
 130
 131 const struct brw_tracked_state brw_vs_pull_constants = {
 132    .dirty = {
 133       .mesa = _NEW_PROGRAM_CONSTANTS,
 134       .brw = BRW_NEW_BATCH |
 135              BRW_NEW_VERTEX_PROGRAM |
 136              BRW_NEW_VS_PROG_DATA,
 137    },
 138    .emit = brw_upload_vs_pull_constants,
 139 };
 140
 141 static void
 142 brw_upload_vs_ubo_surfaces(struct brw_context *brw)
 143 {
 144    struct gl_context *ctx = &brw->ctx;
 145    /* _NEW_PROGRAM */
 146    struct gl_shader_program *prog =
 147       ctx->_Shader->CurrentProgram[MESA_SHADER_VERTEX];
 148    bool dword_pitch;
 149
 150    if (!prog)
 151       return;
 152
 153    /* BRW_NEW_VS_PROG_DATA */
 154    dword_pitch = brw->vs.prog_data->base.simd8;
 155    brw_upload_ubo_surfaces(brw, prog->_LinkedShaders[MESA_SHADER_VERTEX],
 156                            &brw->vs.base, &brw->vs.prog_data->base.base,
 157                            dword_pitch);
 158 }
 159
 160 const struct brw_tracked_state brw_vs_ubo_surfaces = {
 161    .dirty = {
 162       .mesa = _NEW_PROGRAM,
 163       .brw = BRW_NEW_BATCH |
 164              BRW_NEW_UNIFORM_BUFFER |
 165              BRW_NEW_VS_PROG_DATA,
 166    },
 167    .emit = brw_upload_vs_ubo_surfaces,
 168 };
 169
 170 static void
 171 brw_upload_vs_abo_surfaces(struct brw_context *brw)
 172 {
 173    struct gl_context *ctx = &brw->ctx;
 174    /* _NEW_PROGRAM */
 175    struct gl_shader_program *prog =
 176       ctx->_Shader->CurrentProgram[MESA_SHADER_VERTEX];
 177
 178    if (prog) {
 179       /* BRW_NEW_VS_PROG_DATA */
 180       brw_upload_abo_surfaces(brw, prog, &brw->vs.base,
 181                               &brw->vs.prog_data->base.base);
 182    }
 183 }
 184
 185 const struct brw_tracked_state brw_vs_abo_surfaces = {
 186    .dirty = {
 187       .mesa = _NEW_PROGRAM,
 188       .brw = BRW_NEW_ATOMIC_BUFFER |
 189              BRW_NEW_BATCH |
 190              BRW_NEW_VS_PROG_DATA,
 191    },
 192    .emit = brw_upload_vs_abo_surfaces,
 193 };