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                          GLbitfield brw_new_binding_table,
  56                          struct brw_stage_state *stage_state,
  57                          unsigned binding_table_entries,
  58                          int shader_time_surf_index)
  59 {
  60    if (INTEL_DEBUG & DEBUG_SHADER_TIME) {
  61       gen7_create_shader_time_surface(brw, &stage_state->surf_offset[shader_time_surf_index]);
  62    }
  63
  64    /* If there are no surfaces, skip making the binding table altogether. */
  65    if (binding_table_entries == 0) {
  66       if (stage_state->bind_bo_offset != 0) {
  67          brw->state.dirty.brw |= brw_new_binding_table;
  68          stage_state->bind_bo_offset = 0;
  69       }
  70       return;
  71    }
  72
  73    size_t table_size_in_bytes = binding_table_entries * sizeof(uint32_t);
  74
  75    uint32_t *bind = brw_state_batch(brw, AUB_TRACE_BINDING_TABLE,
  76                                     table_size_in_bytes, 32,
  77                                     &stage_state->bind_bo_offset);
  78
  79    /* BRW_NEW_SURFACES and BRW_NEW_*_CONSTBUF */
  80    memcpy(bind, stage_state->surf_offset, table_size_in_bytes);
  81
  82    brw->state.dirty.brw |= brw_new_binding_table;
  83 }
  84
  85 /**
  86  * State atoms which upload the binding table for a particular shader stage.
  87  *  @{
  88  */
  89
  90 /** Upload the VS binding table. */
  91 static void
  92 brw_vs_upload_binding_table(struct brw_context *brw)
  93 {
  94    struct brw_stage_state *stage_state = &brw->vs.base;
  95    /* CACHE_NEW_VS_PROG */
  96    const struct brw_vec4_prog_data *prog_data = &brw->vs.prog_data->base;
  97
  98    /* BRW_NEW_SURFACES and BRW_NEW_VS_CONSTBUF */
  99    brw_upload_binding_table(brw, BRW_NEW_VS_BINDING_TABLE, stage_state,
 100                             prog_data->binding_table_size,
 101                             SURF_INDEX_VEC4_SHADER_TIME);
 102 }
 103
 104 const struct brw_tracked_state brw_vs_binding_table = {
 105    .dirty = {
 106       .mesa = 0,
 107       .brw = BRW_NEW_BATCH |
 108              BRW_NEW_VS_CONSTBUF |
 109              BRW_NEW_SURFACES,
 110       .cache = CACHE_NEW_VS_PROG
 111    },
 112    .emit = brw_vs_upload_binding_table,
 113 };
 114
 115
 116 /** Upload the PS binding table. */
 117 static void
 118 brw_upload_wm_binding_table(struct brw_context *brw)
 119 {
 120    struct brw_stage_state *stage_state = &brw->wm.base;
 121
 122    /* BRW_NEW_SURFACES and CACHE_NEW_WM_PROG */
 123    brw_upload_binding_table(brw, BRW_NEW_PS_BINDING_TABLE, stage_state,
 124                             brw->wm.prog_data->binding_table_size,
 125                             SURF_INDEX_WM_SHADER_TIME);
 126 }
 127
 128 const struct brw_tracked_state brw_wm_binding_table = {
 129    .dirty = {
 130       .mesa = 0,
 131       .brw = BRW_NEW_BATCH | BRW_NEW_SURFACES,
 132       .cache = CACHE_NEW_WM_PROG
 133    },
 134    .emit = brw_upload_wm_binding_table,
 135 };
 136
 137 /** Upload the GS binding table (if GS is active). */
 138 static void
 139 brw_gs_upload_binding_table(struct brw_context *brw)
 140 {
 141    struct brw_stage_state *stage_state = &brw->gs.base;
 142
 143    /* If there's no GS, skip changing anything. */
 144    if (!brw->gs.prog_data)
 145       return;
 146
 147    /* CACHE_NEW_GS_PROG */
 148    const struct brw_vec4_prog_data *prog_data = &brw->gs.prog_data->base;
 149
 150    /* BRW_NEW_SURFACES and BRW_NEW_GS_CONSTBUF */
 151    brw_upload_binding_table(brw, BRW_NEW_GS_BINDING_TABLE, stage_state,
 152                             prog_data->binding_table_size,
 153                             SURF_INDEX_VEC4_SHADER_TIME);
 154 }
 155
 156 const struct brw_tracked_state brw_gs_binding_table = {
 157    .dirty = {
 158       .mesa = 0,
 159       .brw = BRW_NEW_BATCH |
 160              BRW_NEW_GS_CONSTBUF |
 161              BRW_NEW_SURFACES,
 162       .cache = CACHE_NEW_GS_PROG
 163    },
 164    .emit = brw_gs_upload_binding_table,
 165 };
 166
 167 /** @} */
 168
 169 /**
 170  * State atoms which emit 3DSTATE packets to update the binding table pointers.
 171  *  @{
 172  */
 173
 174 /**
 175  * (Gen4-5) Upload the binding table pointers for all shader stages.
 176  *
 177  * The binding table pointers are relative to the surface state base address,
 178  * which points at the batchbuffer containing the streamed batch state.
 179  */
 180 static void
 181 gen4_upload_binding_table_pointers(struct brw_context *brw)
 182 {
 183    BEGIN_BATCH(6);
 184    OUT_BATCH(_3DSTATE_BINDING_TABLE_POINTERS << 16 | (6 - 2));
 185    OUT_BATCH(brw->vs.base.bind_bo_offset);
 186    OUT_BATCH(0); /* gs */
 187    OUT_BATCH(0); /* clip */
 188    OUT_BATCH(0); /* sf */
 189    OUT_BATCH(brw->wm.base.bind_bo_offset);
 190    ADVANCE_BATCH();
 191 }
 192
 193 const struct brw_tracked_state brw_binding_table_pointers = {
 194    .dirty = {
 195       .mesa = 0,
 196       .brw = (BRW_NEW_BATCH |
 197               BRW_NEW_STATE_BASE_ADDRESS |
 198               BRW_NEW_VS_BINDING_TABLE |
 199               BRW_NEW_GS_BINDING_TABLE |
 200               BRW_NEW_PS_BINDING_TABLE),
 201       .cache = 0,
 202    },
 203    .emit = gen4_upload_binding_table_pointers,
 204 };
 205
 206 /**
 207  * (Sandybridge Only) Upload the binding table pointers for all shader stages.
 208  *
 209  * The binding table pointers are relative to the surface state base address,
 210  * which points at the batchbuffer containing the streamed batch state.
 211  */
 212 static void
 213 gen6_upload_binding_table_pointers(struct brw_context *brw)
 214 {
 215    BEGIN_BATCH(4);
 216    OUT_BATCH(_3DSTATE_BINDING_TABLE_POINTERS << 16 |
 217              GEN6_BINDING_TABLE_MODIFY_VS |
 218              GEN6_BINDING_TABLE_MODIFY_GS |
 219              GEN6_BINDING_TABLE_MODIFY_PS |
 220              (4 - 2));
 221    OUT_BATCH(brw->vs.base.bind_bo_offset); /* vs */
 222    OUT_BATCH(brw->ff_gs.bind_bo_offset); /* gs */
 223    OUT_BATCH(brw->wm.base.bind_bo_offset); /* wm/ps */
 224    ADVANCE_BATCH();
 225 }
 226
 227 const struct brw_tracked_state gen6_binding_table_pointers = {
 228    .dirty = {
 229       .mesa = 0,
 230       .brw = (BRW_NEW_BATCH |
 231               BRW_NEW_STATE_BASE_ADDRESS |
 232               BRW_NEW_VS_BINDING_TABLE |
 233               BRW_NEW_GS_BINDING_TABLE |
 234               BRW_NEW_PS_BINDING_TABLE),
 235       .cache = 0,
 236    },
 237    .emit = gen6_upload_binding_table_pointers,
 238 };
 239
 240 /* Gen7+ code lives in gen7_{vs,gs,wm}_state.c. */
 241
 242 /** @} */