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                          GLbitfield brw_new_binding_table,
  56                          struct brw_stage_state *stage_state)
  57 {
  58    /* CACHE_NEW_*_PROG */
  59    struct brw_stage_prog_data *prog_data = stage_state->prog_data;
  60
  61    /* If there are no surfaces, skip making the binding table altogether. */
  62    if (prog_data->binding_table.size_bytes == 0) {
  63       if (stage_state->bind_bo_offset != 0) {
  64          brw->state.dirty.brw |= brw_new_binding_table;
  65          stage_state->bind_bo_offset = 0;
  66       }
  67       return;
  68    }
  69
  70    if (INTEL_DEBUG & DEBUG_SHADER_TIME) {
  71       gen7_create_shader_time_surface(brw, &stage_state->surf_offset[prog_data->binding_table.shader_time_start]);
  72    }
  73
  74    uint32_t *bind = brw_state_batch(brw, AUB_TRACE_BINDING_TABLE,
  75                                     prog_data->binding_table.size_bytes, 32,
  76                                     &stage_state->bind_bo_offset);
  77
  78    /* BRW_NEW_SURFACES and BRW_NEW_*_CONSTBUF */
  79    memcpy(bind, stage_state->surf_offset, prog_data->binding_table.size_bytes);
  80
  81    brw->state.dirty.brw |= brw_new_binding_table;
  82 }
  83
  84 /**
  85  * State atoms which upload the binding table for a particular shader stage.
  86  *  @{
  87  */
  88
  89 /** Upload the VS binding table. */
  90 static void
  91 brw_vs_upload_binding_table(struct brw_context *brw)
  92 {
  93    brw_upload_binding_table(brw, BRW_NEW_VS_BINDING_TABLE, &brw->vs.base);
  94 }
  95
  96 const struct brw_tracked_state brw_vs_binding_table = {
  97    .dirty = {
  98       .mesa = 0,
  99       .brw = BRW_NEW_BATCH |
 100              BRW_NEW_VS_CONSTBUF |
 101              BRW_NEW_SURFACES,
 102       .cache = CACHE_NEW_VS_PROG
 103    },
 104    .emit = brw_vs_upload_binding_table,
 105 };
 106
 107
 108 /** Upload the PS binding table. */
 109 static void
 110 brw_upload_wm_binding_table(struct brw_context *brw)
 111 {
 112    brw_upload_binding_table(brw, BRW_NEW_PS_BINDING_TABLE, &brw->wm.base);
 113 }
 114
 115 const struct brw_tracked_state brw_wm_binding_table = {
 116    .dirty = {
 117       .mesa = 0,
 118       .brw = BRW_NEW_BATCH | BRW_NEW_SURFACES,
 119       .cache = CACHE_NEW_WM_PROG
 120    },
 121    .emit = brw_upload_wm_binding_table,
 122 };
 123
 124 /** Upload the GS binding table (if GS is active). */
 125 static void
 126 brw_gs_upload_binding_table(struct brw_context *brw)
 127 {
 128    /* If there's no GS, skip changing anything. */
 129    if (!brw->gs.prog_data)
 130       return;
 131
 132    brw_upload_binding_table(brw, BRW_NEW_GS_BINDING_TABLE, &brw->gs.base);
 133 }
 134
 135 const struct brw_tracked_state brw_gs_binding_table = {
 136    .dirty = {
 137       .mesa = 0,
 138       .brw = BRW_NEW_BATCH |
 139              BRW_NEW_GS_CONSTBUF |
 140              BRW_NEW_SURFACES,
 141       .cache = CACHE_NEW_GS_PROG
 142    },
 143    .emit = brw_gs_upload_binding_table,
 144 };
 145
 146 /** @} */
 147
 148 /**
 149  * State atoms which emit 3DSTATE packets to update the binding table pointers.
 150  *  @{
 151  */
 152
 153 /**
 154  * (Gen4-5) Upload the binding table pointers for all shader stages.
 155  *
 156  * The binding table pointers are relative to the surface state base address,
 157  * which points at the batchbuffer containing the streamed batch state.
 158  */
 159 static void
 160 gen4_upload_binding_table_pointers(struct brw_context *brw)
 161 {
 162    BEGIN_BATCH(6);
 163    OUT_BATCH(_3DSTATE_BINDING_TABLE_POINTERS << 16 | (6 - 2));
 164    OUT_BATCH(brw->vs.base.bind_bo_offset);
 165    OUT_BATCH(0); /* gs */
 166    OUT_BATCH(0); /* clip */
 167    OUT_BATCH(0); /* sf */
 168    OUT_BATCH(brw->wm.base.bind_bo_offset);
 169    ADVANCE_BATCH();
 170 }
 171
 172 const struct brw_tracked_state brw_binding_table_pointers = {
 173    .dirty = {
 174       .mesa = 0,
 175       .brw = (BRW_NEW_BATCH |
 176               BRW_NEW_STATE_BASE_ADDRESS |
 177               BRW_NEW_VS_BINDING_TABLE |
 178               BRW_NEW_GS_BINDING_TABLE |
 179               BRW_NEW_PS_BINDING_TABLE),
 180       .cache = 0,
 181    },
 182    .emit = gen4_upload_binding_table_pointers,
 183 };
 184
 185 /**
 186  * (Sandybridge Only) Upload the binding table pointers for all shader stages.
 187  *
 188  * The binding table pointers are relative to the surface state base address,
 189  * which points at the batchbuffer containing the streamed batch state.
 190  */
 191 static void
 192 gen6_upload_binding_table_pointers(struct brw_context *brw)
 193 {
 194    BEGIN_BATCH(4);
 195    OUT_BATCH(_3DSTATE_BINDING_TABLE_POINTERS << 16 |
 196              GEN6_BINDING_TABLE_MODIFY_VS |
 197              GEN6_BINDING_TABLE_MODIFY_GS |
 198              GEN6_BINDING_TABLE_MODIFY_PS |
 199              (4 - 2));
 200    OUT_BATCH(brw->vs.base.bind_bo_offset); /* vs */
 201    OUT_BATCH(brw->ff_gs.bind_bo_offset); /* gs */
 202    OUT_BATCH(brw->wm.base.bind_bo_offset); /* wm/ps */
 203    ADVANCE_BATCH();
 204 }
 205
 206 const struct brw_tracked_state gen6_binding_table_pointers = {
 207    .dirty = {
 208       .mesa = 0,
 209       .brw = (BRW_NEW_BATCH |
 210               BRW_NEW_STATE_BASE_ADDRESS |
 211               BRW_NEW_VS_BINDING_TABLE |
 212               BRW_NEW_GS_BINDING_TABLE |
 213               BRW_NEW_PS_BINDING_TABLE),
 214       .cache = 0,
 215    },
 216    .emit = gen6_upload_binding_table_pointers,
 217 };
 218
 219 /* Gen7+ code lives in gen7_{vs,gs,wm}_state.c. */
 220
 221 /** @} */