/*
 * Copyright © 2015 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.
 */

#ifndef BRW_PERFORMANCE_QUERY_H
#define BRW_PERFORMANCE_QUERY_H

#include <stdint.h>

#include "brw_context.h"

#include "perf/gen_perf.h"

struct gen_perf_query_info;

/*
 * When currently allocate only one page for pipeline statistics queries. Here
 * we derived the maximum number of counters for that amount.
 */
#define STATS_BO_SIZE               4096
#define STATS_BO_END_OFFSET_BYTES   (STATS_BO_SIZE / 2)
#define MAX_STAT_COUNTERS           (STATS_BO_END_OFFSET_BYTES / 8)

/**
 * i965 representation of a performance query object.
 *
 * NB: We want to keep this structure relatively lean considering that
 * applications may expect to allocate enough objects to be able to
 * query around all draw calls in a frame.
 */
struct brw_perf_query_object
{
   struct gl_perf_query_object base;

   const struct gen_perf_query_info *query;

   /* See query->kind to know which state below is in use... */
   union {
      struct {

         /**
          * BO containing OA counter snapshots at query Begin/End time.
          */
         struct brw_bo *bo;

         /**
          * Address of mapped of @bo
          */
         void *map;

         /**
          * The MI_REPORT_PERF_COUNT command lets us specify a unique
          * ID that will be reflected in the resulting OA report
          * that's written by the GPU. This is the ID we're expecting
          * in the begin report and the the end report should be
          * @begin_report_id + 1.
          */
         int begin_report_id;

         /**
          * Reference the head of the brw->perfquery.sample_buffers
          * list at the time that the query started (so we only need
          * to look at nodes after this point when looking for samples
          * related to this query)
          *
          * (See struct brw_oa_sample_buf description for more details)
          */
         struct exec_node *samples_head;

         /**
          * false while in the unaccumulated_elements list, and set to
          * true when the final, end MI_RPC snapshot has been
          * accumulated.
          */
         bool results_accumulated;

         /**
          * Frequency of the GT at begin and end of the query.
          */
         uint64_t gt_frequency[2];

         /**
          * Accumulated OA results between begin and end of the query.
          */
         struct gen_perf_query_result result;
      } oa;

      struct {
         /**
          * BO containing starting and ending snapshots for the
          * statistics counters.
          */
         struct brw_bo *bo;
      } pipeline_stats;
   };
};

void brw_perf_query_register_mdapi_oa_query(struct brw_context *brw);
void brw_perf_query_register_mdapi_statistic_query(struct brw_context *brw);

#endif /* BRW_PERFORMANCE_QUERY_H */