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    /* BRW_NEW_*_PROG_DATA */
  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 && brw->gen < 9)
  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.emit_buffer_surface_state(
  72             brw, &stage_state->surf_offset[
  73                     prog_data->binding_table.shader_time_start],
  74             brw->shader_time.bo, 0, BRW_SURFACEFORMAT_RAW,
  75             brw->shader_time.bo->size, 1, true);
  76       }
  77
  78       uint32_t *bind = brw_state_batch(brw, AUB_TRACE_BINDING_TABLE,
  79                                        prog_data->binding_table.size_bytes, 32,
  80                                        &stage_state->bind_bo_offset);
  81
  82       /* BRW_NEW_SURFACES and BRW_NEW_*_CONSTBUF */
  83       memcpy(bind, stage_state->surf_offset,
  84              prog_data->binding_table.size_bytes);
  85    }
  86
  87    brw->state.dirty.brw |= brw_new_binding_table;
  88
  89    if (brw->gen >= 7) {
  90       BEGIN_BATCH(2);
  91       OUT_BATCH(packet_name << 16 | (2 - 2));
  92       OUT_BATCH(stage_state->bind_bo_offset);
  93       ADVANCE_BATCH();
  94    }
  95 }
  96
  97 /**
  98  * State atoms which upload the binding table for a particular shader stage.
  99  *  @{
 100  */
 101
 102 /** Upload the VS binding table. */
 103 static void
 104 brw_vs_upload_binding_table(struct brw_context *brw)
 105 {
 106    brw_upload_binding_table(brw,
 107                             _3DSTATE_BINDING_TABLE_POINTERS_VS,
 108                             BRW_NEW_VS_BINDING_TABLE, &brw->vs.base);
 109 }
 110
 111 const struct brw_tracked_state brw_vs_binding_table = {
 112    .dirty = {
 113       .mesa = 0,
 114       .brw = BRW_NEW_BATCH |
 115              BRW_NEW_VS_CONSTBUF |
 116              BRW_NEW_VS_PROG_DATA |
 117              BRW_NEW_SURFACES,
 118    },
 119    .emit = brw_vs_upload_binding_table,
 120 };
 121
 122
 123 /** Upload the PS binding table. */
 124 static void
 125 brw_upload_wm_binding_table(struct brw_context *brw)
 126 {
 127    brw_upload_binding_table(brw,
 128                             _3DSTATE_BINDING_TABLE_POINTERS_PS,
 129                             BRW_NEW_PS_BINDING_TABLE, &brw->wm.base);
 130 }
 131
 132 const struct brw_tracked_state brw_wm_binding_table = {
 133    .dirty = {
 134       .mesa = 0,
 135       .brw = BRW_NEW_BATCH |
 136              BRW_NEW_FS_PROG_DATA |
 137              BRW_NEW_SURFACES,
 138    },
 139    .emit = brw_upload_wm_binding_table,
 140 };
 141
 142 /** Upload the GS binding table (if GS is active). */
 143 static void
 144 brw_gs_upload_binding_table(struct brw_context *brw)
 145 {
 146    /* If there's no GS, skip changing anything. */
 147    if (brw->geometry_program == NULL)
 148       return;
 149
 150    brw_upload_binding_table(brw,
 151                             _3DSTATE_BINDING_TABLE_POINTERS_GS,
 152                             BRW_NEW_GS_BINDING_TABLE, &brw->gs.base);
 153 }
 154
 155 const struct brw_tracked_state brw_gs_binding_table = {
 156    .dirty = {
 157       .mesa = 0,
 158       .brw = BRW_NEW_BATCH |
 159              BRW_NEW_GS_CONSTBUF |
 160              BRW_NEW_GS_PROG_DATA |
 161              BRW_NEW_SURFACES,
 162    },
 163    .emit = brw_gs_upload_binding_table,
 164 };
 165
 166 /** @} */
 167
 168 /**
 169  * State atoms which emit 3DSTATE packets to update the binding table pointers.
 170  *  @{
 171  */
 172
 173 /**
 174  * (Gen4-5) Upload the binding table pointers for all shader stages.
 175  *
 176  * The binding table pointers are relative to the surface state base address,
 177  * which points at the batchbuffer containing the streamed batch state.
 178  */
 179 static void
 180 gen4_upload_binding_table_pointers(struct brw_context *brw)
 181 {
 182    BEGIN_BATCH(6);
 183    OUT_BATCH(_3DSTATE_BINDING_TABLE_POINTERS << 16 | (6 - 2));
 184    OUT_BATCH(brw->vs.base.bind_bo_offset);
 185    OUT_BATCH(0); /* gs */
 186    OUT_BATCH(0); /* clip */
 187    OUT_BATCH(0); /* sf */
 188    OUT_BATCH(brw->wm.base.bind_bo_offset);
 189    ADVANCE_BATCH();
 190 }
 191
 192 const struct brw_tracked_state brw_binding_table_pointers = {
 193    .dirty = {
 194       .mesa = 0,
 195       .brw = BRW_NEW_BATCH |
 196              BRW_NEW_GS_BINDING_TABLE |
 197              BRW_NEW_PS_BINDING_TABLE |
 198              BRW_NEW_STATE_BASE_ADDRESS |
 199              BRW_NEW_VS_BINDING_TABLE,
 200    },
 201    .emit = gen4_upload_binding_table_pointers,
 202 };
 203
 204 /**
 205  * (Sandybridge Only) Upload the binding table pointers for all shader stages.
 206  *
 207  * The binding table pointers are relative to the surface state base address,
 208  * which points at the batchbuffer containing the streamed batch state.
 209  */
 210 static void
 211 gen6_upload_binding_table_pointers(struct brw_context *brw)
 212 {
 213    BEGIN_BATCH(4);
 214    OUT_BATCH(_3DSTATE_BINDING_TABLE_POINTERS << 16 |
 215              GEN6_BINDING_TABLE_MODIFY_VS |
 216              GEN6_BINDING_TABLE_MODIFY_GS |
 217              GEN6_BINDING_TABLE_MODIFY_PS |
 218              (4 - 2));
 219    OUT_BATCH(brw->vs.base.bind_bo_offset); /* vs */
 220    if (brw->ff_gs.prog_active)
 221       OUT_BATCH(brw->ff_gs.bind_bo_offset); /* gs */
 222    else
 223       OUT_BATCH(brw->gs.base.bind_bo_offset); /* gs */
 224    OUT_BATCH(brw->wm.base.bind_bo_offset); /* wm/ps */
 225    ADVANCE_BATCH();
 226 }
 227
 228 const struct brw_tracked_state gen6_binding_table_pointers = {
 229    .dirty = {
 230       .mesa = 0,
 231       .brw = BRW_NEW_BATCH |
 232              BRW_NEW_GS_BINDING_TABLE |
 233              BRW_NEW_PS_BINDING_TABLE |
 234              BRW_NEW_STATE_BASE_ADDRESS |
 235              BRW_NEW_VS_BINDING_TABLE,
 236    },
 237    .emit = gen6_upload_binding_table_pointers,
 238 };
 239
 240 /** @} */