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 void
  54 brw_upload_binding_table(struct brw_context *brw,
  55                          uint32_t packet_name,
  56                          GLbitfield brw_new_binding_table,
  57                          const struct brw_stage_prog_data *prog_data,
  58                          struct brw_stage_state *stage_state)
  59 {
  60    if (prog_data->binding_table.size_bytes == 0) {
  61       /* There are no surfaces; skip making the binding table altogether. */
  62       if (stage_state->bind_bo_offset == 0 && brw->gen < 9)
  63          return;
  64
  65       stage_state->bind_bo_offset = 0;
  66    } else {
  67       /* Upload a new binding table. */
  68       if (INTEL_DEBUG & DEBUG_SHADER_TIME) {
  69          brw->vtbl.emit_buffer_surface_state(
  70             brw, &stage_state->surf_offset[
  71                     prog_data->binding_table.shader_time_start],
  72             brw->shader_time.bo, 0, BRW_SURFACEFORMAT_RAW,
  73             brw->shader_time.bo->size, 1, 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->ctx.NewDriverState |= 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_NEW_VS_PROG_DATA */
 105    const struct brw_stage_prog_data *prog_data = brw->vs.base.prog_data;
 106    brw_upload_binding_table(brw,
 107                             _3DSTATE_BINDING_TABLE_POINTERS_VS,
 108                             BRW_NEW_VS_BINDING_TABLE, prog_data,
 109                             &brw->vs.base);
 110 }
 111
 112 const struct brw_tracked_state brw_vs_binding_table = {
 113    .dirty = {
 114       .mesa = 0,
 115       .brw = BRW_NEW_BATCH |
 116              BRW_NEW_VS_CONSTBUF |
 117              BRW_NEW_VS_PROG_DATA |
 118              BRW_NEW_SURFACES,
 119    },
 120    .emit = brw_vs_upload_binding_table,
 121 };
 122
 123
 124 /** Upload the PS binding table. */
 125 static void
 126 brw_upload_wm_binding_table(struct brw_context *brw)
 127 {
 128    /* BRW_NEW_FS_PROG_DATA */
 129    const struct brw_stage_prog_data *prog_data = brw->wm.base.prog_data;
 130    brw_upload_binding_table(brw,
 131                             _3DSTATE_BINDING_TABLE_POINTERS_PS,
 132                             BRW_NEW_PS_BINDING_TABLE, prog_data,
 133                             &brw->wm.base);
 134 }
 135
 136 const struct brw_tracked_state brw_wm_binding_table = {
 137    .dirty = {
 138       .mesa = 0,
 139       .brw = BRW_NEW_BATCH |
 140              BRW_NEW_FS_PROG_DATA |
 141              BRW_NEW_SURFACES,
 142    },
 143    .emit = brw_upload_wm_binding_table,
 144 };
 145
 146 /** Upload the GS binding table (if GS is active). */
 147 static void
 148 brw_gs_upload_binding_table(struct brw_context *brw)
 149 {
 150    /* If there's no GS, skip changing anything. */
 151    if (brw->geometry_program == NULL)
 152       return;
 153
 154    /* BRW_NEW_GS_PROG_DATA */
 155    const struct brw_stage_prog_data *prog_data = brw->gs.base.prog_data;
 156    brw_upload_binding_table(brw,
 157                             _3DSTATE_BINDING_TABLE_POINTERS_GS,
 158                             BRW_NEW_GS_BINDING_TABLE, prog_data,
 159                             &brw->gs.base);
 160 }
 161
 162 const struct brw_tracked_state brw_gs_binding_table = {
 163    .dirty = {
 164       .mesa = 0,
 165       .brw = BRW_NEW_BATCH |
 166              BRW_NEW_GS_CONSTBUF |
 167              BRW_NEW_GS_PROG_DATA |
 168              BRW_NEW_SURFACES,
 169    },
 170    .emit = brw_gs_upload_binding_table,
 171 };
 172
 173 /** @} */
 174
 175 /**
 176  * State atoms which emit 3DSTATE packets to update the binding table pointers.
 177  *  @{
 178  */
 179
 180 /**
 181  * (Gen4-5) Upload the binding table pointers for all shader stages.
 182  *
 183  * The binding table pointers are relative to the surface state base address,
 184  * which points at the batchbuffer containing the streamed batch state.
 185  */
 186 static void
 187 gen4_upload_binding_table_pointers(struct brw_context *brw)
 188 {
 189    BEGIN_BATCH(6);
 190    OUT_BATCH(_3DSTATE_BINDING_TABLE_POINTERS << 16 | (6 - 2));
 191    OUT_BATCH(brw->vs.base.bind_bo_offset);
 192    OUT_BATCH(0); /* gs */
 193    OUT_BATCH(0); /* clip */
 194    OUT_BATCH(0); /* sf */
 195    OUT_BATCH(brw->wm.base.bind_bo_offset);
 196    ADVANCE_BATCH();
 197 }
 198
 199 const struct brw_tracked_state brw_binding_table_pointers = {
 200    .dirty = {
 201       .mesa = 0,
 202       .brw = BRW_NEW_BATCH |
 203              BRW_NEW_GS_BINDING_TABLE |
 204              BRW_NEW_PS_BINDING_TABLE |
 205              BRW_NEW_STATE_BASE_ADDRESS |
 206              BRW_NEW_VS_BINDING_TABLE,
 207    },
 208    .emit = gen4_upload_binding_table_pointers,
 209 };
 210
 211 /**
 212  * (Sandybridge Only) Upload the binding table pointers for all shader stages.
 213  *
 214  * The binding table pointers are relative to the surface state base address,
 215  * which points at the batchbuffer containing the streamed batch state.
 216  */
 217 static void
 218 gen6_upload_binding_table_pointers(struct brw_context *brw)
 219 {
 220    BEGIN_BATCH(4);
 221    OUT_BATCH(_3DSTATE_BINDING_TABLE_POINTERS << 16 |
 222              GEN6_BINDING_TABLE_MODIFY_VS |
 223              GEN6_BINDING_TABLE_MODIFY_GS |
 224              GEN6_BINDING_TABLE_MODIFY_PS |
 225              (4 - 2));
 226    OUT_BATCH(brw->vs.base.bind_bo_offset); /* vs */
 227    if (brw->ff_gs.prog_active)
 228       OUT_BATCH(brw->ff_gs.bind_bo_offset); /* gs */
 229    else
 230       OUT_BATCH(brw->gs.base.bind_bo_offset); /* gs */
 231    OUT_BATCH(brw->wm.base.bind_bo_offset); /* wm/ps */
 232    ADVANCE_BATCH();
 233 }
 234
 235 const struct brw_tracked_state gen6_binding_table_pointers = {
 236    .dirty = {
 237       .mesa = 0,
 238       .brw = BRW_NEW_BATCH |
 239              BRW_NEW_GS_BINDING_TABLE |
 240              BRW_NEW_PS_BINDING_TABLE |
 241              BRW_NEW_STATE_BASE_ADDRESS |
 242              BRW_NEW_VS_BINDING_TABLE,
 243    },
 244    .emit = gen6_upload_binding_table_pointers,
 245 };
 246
 247 /** @} */