src/mesa/drivers/dri/i965/brw_binding_tables.c

   1 /*
   2  * Copyright © 2013 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 /**
  25  * \file brw_binding_tables.c
  26  *
  27  * State atoms which upload the "binding table" for each shader stage.
  28  *
  29  * Binding tables map a numeric "surface index" to the SURFACE_STATE structure
  30  * for a currently bound surface.  This allows SEND messages (such as sampler
  31  * or data port messages) to refer to a particular surface by number, rather
  32  * than by pointer.
  33  *
  34  * The binding table is stored as a (sparse) array of SURFACE_STATE entries;
  35  * surface indexes are simply indexes into the array.  The ordering of the
  36  * entries is entirely left up to software; see the SURF_INDEX_* macros in
  37  * brw_context.h to see our current layout.
  38  */
  39
  40 #include "main/mtypes.h"
  41
  42 #include "brw_context.h"
  43 #include "brw_defines.h"
  44 #include "brw_state.h"
  45 #include "intel_batchbuffer.h"
  46
  47 /**
  48  * Upload a shader stage's binding table as indirect state.
  49  *
  50  * This copies brw_stage_state::surf_offset[] into the indirect state section
  51  * of the batchbuffer (allocated by brw_state_batch()).
  52  */
  53 static void
  54 brw_upload_binding_table(struct brw_context *brw,
  55                          uint32_t packet_name,
  56                          GLbitfield brw_new_binding_table,
  57                          struct brw_stage_state *stage_state)
  58 {
  59    /* CACHE_NEW_*_PROG */
  60    struct brw_stage_prog_data *prog_data = stage_state->prog_data;
  61
  62    if (prog_data->binding_table.size_bytes == 0) {
  63       /* There are no surfaces; skip making the binding table altogether. */
  64       if (stage_state->bind_bo_offset == 0)
  65          return;
  66
  67       stage_state->bind_bo_offset = 0;
  68    } else {
  69       /* Upload a new binding table. */
  70       if (INTEL_DEBUG & DEBUG_SHADER_TIME) {
  71          brw->vtbl.create_raw_surface(
  72             brw, brw->shader_time.bo, 0, brw->shader_time.bo->size,
  73             &stage_state->surf_offset[prog_data->binding_table.shader_time_start], true);
  74       }
  75
  76       uint32_t *bind = brw_state_batch(brw, AUB_TRACE_BINDING_TABLE,
  77                                        prog_data->binding_table.size_bytes, 32,
  78                                        &stage_state->bind_bo_offset);
  79
  80       /* BRW_NEW_SURFACES and BRW_NEW_*_CONSTBUF */
  81       memcpy(bind, stage_state->surf_offset,
  82              prog_data->binding_table.size_bytes);
  83    }
  84
  85    brw->state.dirty.brw |= brw_new_binding_table;
  86
  87    if (brw->gen >= 7) {
  88       BEGIN_BATCH(2);
  89       OUT_BATCH(packet_name << 16 | (2 - 2));
  90       OUT_BATCH(stage_state->bind_bo_offset);
  91       ADVANCE_BATCH();
  92    }
  93 }
  94
  95 /**
  96  * State atoms which upload the binding table for a particular shader stage.
  97  *  @{
  98  */
  99
 100 /** Upload the VS binding table. */
 101 static void
 102 brw_vs_upload_binding_table(struct brw_context *brw)
 103 {
 104    brw_upload_binding_table(brw,
 105                             _3DSTATE_BINDING_TABLE_POINTERS_VS,
 106                             BRW_NEW_VS_BINDING_TABLE, &brw->vs.base);
 107 }
 108
 109 const struct brw_tracked_state brw_vs_binding_table = {
 110    .dirty = {
 111       .mesa = 0,
 112       .brw = BRW_NEW_BATCH |
 113              BRW_NEW_VS_CONSTBUF |
 114              BRW_NEW_SURFACES,
 115       .cache = CACHE_NEW_VS_PROG
 116    },
 117    .emit = brw_vs_upload_binding_table,
 118 };
 119
 120
 121 /** Upload the PS binding table. */
 122 static void
 123 brw_upload_wm_binding_table(struct brw_context *brw)
 124 {
 125    brw_upload_binding_table(brw,
 126                             _3DSTATE_BINDING_TABLE_POINTERS_PS,
 127                             BRW_NEW_PS_BINDING_TABLE, &brw->wm.base);
 128 }
 129
 130 const struct brw_tracked_state brw_wm_binding_table = {
 131    .dirty = {
 132       .mesa = 0,
 133       .brw = BRW_NEW_BATCH | BRW_NEW_SURFACES,
 134       .cache = CACHE_NEW_WM_PROG
 135    },
 136    .emit = brw_upload_wm_binding_table,
 137 };
 138
 139 /** Upload the GS binding table (if GS is active). */
 140 static void
 141 brw_gs_upload_binding_table(struct brw_context *brw)
 142 {
 143    /* If there's no GS, skip changing anything. */
 144    if (brw->geometry_program == NULL)
 145       return;
 146
 147    brw_upload_binding_table(brw,
 148                             _3DSTATE_BINDING_TABLE_POINTERS_GS,
 149                             BRW_NEW_GS_BINDING_TABLE, &brw->gs.base);
 150 }
 151
 152 const struct brw_tracked_state brw_gs_binding_table = {
 153    .dirty = {
 154       .mesa = 0,
 155       .brw = BRW_NEW_BATCH |
 156              BRW_NEW_GS_CONSTBUF |
 157              BRW_NEW_SURFACES,
 158       .cache = CACHE_NEW_GS_PROG
 159    },
 160    .emit = brw_gs_upload_binding_table,
 161 };
 162
 163 /** @} */
 164
 165 /**
 166  * State atoms which emit 3DSTATE packets to update the binding table pointers.
 167  *  @{
 168  */
 169
 170 /**
 171  * (Gen4-5) Upload the binding table pointers for all shader stages.
 172  *
 173  * The binding table pointers are relative to the surface state base address,
 174  * which points at the batchbuffer containing the streamed batch state.
 175  */
 176 static void
 177 gen4_upload_binding_table_pointers(struct brw_context *brw)
 178 {
 179    BEGIN_BATCH(6);
 180    OUT_BATCH(_3DSTATE_BINDING_TABLE_POINTERS << 16 | (6 - 2));
 181    OUT_BATCH(brw->vs.base.bind_bo_offset);
 182    OUT_BATCH(0); /* gs */
 183    OUT_BATCH(0); /* clip */
 184    OUT_BATCH(0); /* sf */
 185    OUT_BATCH(brw->wm.base.bind_bo_offset);
 186    ADVANCE_BATCH();
 187 }
 188
 189 const struct brw_tracked_state brw_binding_table_pointers = {
 190    .dirty = {
 191       .mesa = 0,
 192       .brw = (BRW_NEW_BATCH |
 193               BRW_NEW_STATE_BASE_ADDRESS |
 194               BRW_NEW_VS_BINDING_TABLE |
 195               BRW_NEW_GS_BINDING_TABLE |
 196               BRW_NEW_PS_BINDING_TABLE),
 197       .cache = 0,
 198    },
 199    .emit = gen4_upload_binding_table_pointers,
 200 };
 201
 202 /**
 203  * (Sandybridge Only) Upload the binding table pointers for all shader stages.
 204  *
 205  * The binding table pointers are relative to the surface state base address,
 206  * which points at the batchbuffer containing the streamed batch state.
 207  */
 208 static void
 209 gen6_upload_binding_table_pointers(struct brw_context *brw)
 210 {
 211    BEGIN_BATCH(4);
 212    OUT_BATCH(_3DSTATE_BINDING_TABLE_POINTERS << 16 |
 213              GEN6_BINDING_TABLE_MODIFY_VS |
 214              GEN6_BINDING_TABLE_MODIFY_GS |
 215              GEN6_BINDING_TABLE_MODIFY_PS |
 216              (4 - 2));
 217    OUT_BATCH(brw->vs.base.bind_bo_offset); /* vs */
 218    if (brw->ff_gs.prog_active)
 219       OUT_BATCH(brw->ff_gs.bind_bo_offset); /* gs */
 220    else
 221       OUT_BATCH(brw->gs.base.bind_bo_offset); /* gs */
 222    OUT_BATCH(brw->wm.base.bind_bo_offset); /* wm/ps */
 223    ADVANCE_BATCH();
 224 }
 225
 226 const struct brw_tracked_state gen6_binding_table_pointers = {
 227    .dirty = {
 228       .mesa = 0,
 229       .brw = (BRW_NEW_BATCH |
 230               BRW_NEW_STATE_BASE_ADDRESS |
 231               BRW_NEW_VS_BINDING_TABLE |
 232               BRW_NEW_GS_BINDING_TABLE |
 233               BRW_NEW_PS_BINDING_TABLE),
 234       .cache = 0,
 235    },
 236    .emit = gen6_upload_binding_table_pointers,
 237 };
 238
 239 /** @} */