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/*

 * Copyright © 2013 Intel Corporation

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice (including the next

 * paragraph) shall be included in all copies or substantial portions of the

 * Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS

 * IN THE SOFTWARE.

 */

/**

 * \file brw_binding_tables.c

 *

 * State atoms which upload the "binding table" for each shader stage.

 *

 * Binding tables map a numeric "surface index" to the SURFACE_STATE structure

 * for a currently bound surface.  This allows SEND messages (such as sampler

 * or data port messages) to refer to a particular surface by number, rather

 * than by pointer.

 *

 * The binding table is stored as a (sparse) array of SURFACE_STATE entries;

 * surface indexes are simply indexes into the array.  The ordering of the

 * entries is entirely left up to software; see the SURF_INDEX_* macros in

 * brw_context.h to see our current layout.

 */

#include "main/mtypes.h"

#include "brw_context.h"

#include "brw_defines.h"

#include "brw_state.h"

#include "intel_batchbuffer.h"

/**

 * Upload a shader stage's binding table as indirect state.

 *

 * This copies brw_stage_state::surf_offset[] into the indirect state section

 * of the batchbuffer (allocated by brw_state_batch()).

 */

void

brw_upload_binding_table(struct brw_context *brw,

                         uint32_t packet_name,

                         GLbitfield brw_new_binding_table,

                         const struct brw_stage_prog_data *prog_data,

                         struct brw_stage_state *stage_state)

{

   if (prog_data->binding_table.size_bytes == 0) {

      /* There are no surfaces; skip making the binding table altogether. */

      if (stage_state->bind_bo_offset == 0 && brw->gen < 9)

         return;

      stage_state->bind_bo_offset = 0;

   } else {

      /* Upload a new binding table. */

      if (INTEL_DEBUG & DEBUG_SHADER_TIME) {

         brw->vtbl.emit_buffer_surface_state(

            brw, &stage_state->surf_offset[

                    prog_data->binding_table.shader_time_start],

            brw->shader_time.bo, 0, BRW_SURFACEFORMAT_RAW,

            brw->shader_time.bo->size, 1, true);

      }

      uint32_t *bind = brw_state_batch(brw, AUB_TRACE_BINDING_TABLE,

                                       prog_data->binding_table.size_bytes, 32,

                                       &stage_state->bind_bo_offset);

      /* BRW_NEW_SURFACES and BRW_NEW_*_CONSTBUF */

      memcpy(bind, stage_state->surf_offset,

             prog_data->binding_table.size_bytes);

   }

   brw->ctx.NewDriverState |= brw_new_binding_table;

   if (brw->gen >= 7) {

      BEGIN_BATCH(2);

      OUT_BATCH(packet_name << 16 | (2 - 2));

      OUT_BATCH(stage_state->bind_bo_offset);

      ADVANCE_BATCH();

   }

}

/**

 * State atoms which upload the binding table for a particular shader stage.

 *  @{

 */

/** Upload the VS binding table. */

static void

brw_vs_upload_binding_table(struct brw_context *brw)

{

   /* BRW_NEW_VS_PROG_DATA */

   const struct brw_stage_prog_data *prog_data = brw->vs.base.prog_data;

   brw_upload_binding_table(brw,

                            _3DSTATE_BINDING_TABLE_POINTERS_VS,

                            BRW_NEW_VS_BINDING_TABLE, prog_data,

                            &brw->vs.base);

}

const struct brw_tracked_state brw_vs_binding_table = {

   .dirty = {

      .mesa = 0,

      .brw = BRW_NEW_BATCH |

             BRW_NEW_VS_CONSTBUF |

             BRW_NEW_VS_PROG_DATA |

             BRW_NEW_SURFACES,

   },

   .emit = brw_vs_upload_binding_table,

};

/** Upload the PS binding table. */

static void

brw_upload_wm_binding_table(struct brw_context *brw)

{

   /* BRW_NEW_FS_PROG_DATA */

   const struct brw_stage_prog_data *prog_data = brw->wm.base.prog_data;

   brw_upload_binding_table(brw,

                            _3DSTATE_BINDING_TABLE_POINTERS_PS,

                            BRW_NEW_PS_BINDING_TABLE, prog_data,

                            &brw->wm.base);

}

const struct brw_tracked_state brw_wm_binding_table = {

   .dirty = {

      .mesa = 0,

      .brw = BRW_NEW_BATCH |

             BRW_NEW_FS_PROG_DATA |

             BRW_NEW_SURFACES,

   },

   .emit = brw_upload_wm_binding_table,

};

/** Upload the GS binding table (if GS is active). */

static void

brw_gs_upload_binding_table(struct brw_context *brw)

{

   /* If there's no GS, skip changing anything. */

   if (brw->geometry_program == NULL)

      return;

   /* BRW_NEW_GS_PROG_DATA */

   const struct brw_stage_prog_data *prog_data = brw->gs.base.prog_data;

   brw_upload_binding_table(brw,

                            _3DSTATE_BINDING_TABLE_POINTERS_GS,

                            BRW_NEW_GS_BINDING_TABLE, prog_data,

                            &brw->gs.base);

}

const struct brw_tracked_state brw_gs_binding_table = {

   .dirty = {

      .mesa = 0,

      .brw = BRW_NEW_BATCH |

             BRW_NEW_GS_CONSTBUF |

             BRW_NEW_GS_PROG_DATA |

             BRW_NEW_SURFACES,

   },

   .emit = brw_gs_upload_binding_table,

};

/** @} */

/**

 * State atoms which emit 3DSTATE packets to update the binding table pointers.

 *  @{

 */

/**

 * (Gen4-5) Upload the binding table pointers for all shader stages.

 *

 * The binding table pointers are relative to the surface state base address,

 * which points at the batchbuffer containing the streamed batch state.

 */

static void

gen4_upload_binding_table_pointers(struct brw_context *brw)

{

   BEGIN_BATCH(6);

   OUT_BATCH(_3DSTATE_BINDING_TABLE_POINTERS << 16 | (6 - 2));

   OUT_BATCH(brw->vs.base.bind_bo_offset);

   OUT_BATCH(0); /* gs */

   OUT_BATCH(0); /* clip */

   OUT_BATCH(0); /* sf */

   OUT_BATCH(brw->wm.base.bind_bo_offset);

   ADVANCE_BATCH();

}

const struct brw_tracked_state brw_binding_table_pointers = {

   .dirty = {

      .mesa = 0,

      .brw = BRW_NEW_BATCH |

             BRW_NEW_GS_BINDING_TABLE |

             BRW_NEW_PS_BINDING_TABLE |

             BRW_NEW_STATE_BASE_ADDRESS |

             BRW_NEW_VS_BINDING_TABLE,

   },

   .emit = gen4_upload_binding_table_pointers,

};

/**

 * (Sandybridge Only) Upload the binding table pointers for all shader stages.

 *

 * The binding table pointers are relative to the surface state base address,

 * which points at the batchbuffer containing the streamed batch state.

 */

static void

gen6_upload_binding_table_pointers(struct brw_context *brw)

{

   BEGIN_BATCH(4);

   OUT_BATCH(_3DSTATE_BINDING_TABLE_POINTERS << 16 |

             GEN6_BINDING_TABLE_MODIFY_VS |

             GEN6_BINDING_TABLE_MODIFY_GS |

             GEN6_BINDING_TABLE_MODIFY_PS |

             (4 - 2));

   OUT_BATCH(brw->vs.base.bind_bo_offset); /* vs */

   if (brw->ff_gs.prog_active)

      OUT_BATCH(brw->ff_gs.bind_bo_offset); /* gs */

   else

      OUT_BATCH(brw->gs.base.bind_bo_offset); /* gs */

   OUT_BATCH(brw->wm.base.bind_bo_offset); /* wm/ps */

   ADVANCE_BATCH();

}

const struct brw_tracked_state gen6_binding_table_pointers = {

   .dirty = {

      .mesa = 0,

      .brw = BRW_NEW_BATCH |

             BRW_NEW_GS_BINDING_TABLE |

             BRW_NEW_PS_BINDING_TABLE |

             BRW_NEW_STATE_BASE_ADDRESS |

             BRW_NEW_VS_BINDING_TABLE,

   },

   .emit = gen6_upload_binding_table_pointers,

};

/** @} */