/*
 * Copyright © 2019 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 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.
 */

/**
 * Intel Performance query interface to gallium.
 */

#include "st_debug.h"
#include "st_context.h"
#include "st_cb_bitmap.h"
#include "st_cb_perfquery.h"
#include "st_util.h"

#include "util/bitset.h"

#include "pipe/p_context.h"
#include "pipe/p_screen.h"
#include "util/u_memory.h"

bool
st_have_perfquery(struct st_context *st)
{
   struct pipe_context *pipe = st->pipe;

   return pipe->init_intel_perf_query_info && pipe->get_intel_perf_query_info &&
          pipe->get_intel_perf_query_counter_info &&
          pipe->new_intel_perf_query_obj && pipe->begin_intel_perf_query &&
          pipe->end_intel_perf_query && pipe->delete_intel_perf_query &&
          pipe->wait_intel_perf_query && pipe->is_intel_perf_query_ready &&
          pipe->get_intel_perf_query_data;
}

static unsigned
st_InitPerfQueryInfo(struct gl_context *ctx)
{
   struct pipe_context *pipe = st_context(ctx)->pipe;

   return pipe->init_intel_perf_query_info(pipe);
}

static void
st_GetPerfQueryInfo(struct gl_context *ctx,
                    unsigned query_index,
                    const char **name,
                    GLuint *data_size,
                    GLuint *n_counters,
                    GLuint *n_active)
{
   struct pipe_context *pipe = st_context(ctx)->pipe;

   pipe->get_intel_perf_query_info(pipe, query_index, name, data_size,
                                   n_counters, n_active);
}

static uint32_t
pipe_counter_type_enum_to_gl_type(enum pipe_perf_counter_type type)
{
   switch (type) {
   case PIPE_PERF_COUNTER_TYPE_EVENT: return GL_PERFQUERY_COUNTER_EVENT_INTEL;
   case PIPE_PERF_COUNTER_TYPE_DURATION_NORM: return GL_PERFQUERY_COUNTER_DURATION_NORM_INTEL;
   case PIPE_PERF_COUNTER_TYPE_DURATION_RAW: return GL_PERFQUERY_COUNTER_DURATION_RAW_INTEL;
   case PIPE_PERF_COUNTER_TYPE_THROUGHPUT: return GL_PERFQUERY_COUNTER_THROUGHPUT_INTEL;
   case PIPE_PERF_COUNTER_TYPE_RAW: return GL_PERFQUERY_COUNTER_RAW_INTEL;
   case PIPE_PERF_COUNTER_TYPE_TIMESTAMP: return GL_PERFQUERY_COUNTER_TIMESTAMP_INTEL;
   default:
      unreachable("Unknown counter type");
   }
}

static uint32_t
pipe_counter_data_type_to_gl_type(enum pipe_perf_counter_data_type type)
{
   switch (type) {
   case PIPE_PERF_COUNTER_DATA_TYPE_BOOL32: return GL_PERFQUERY_COUNTER_DATA_BOOL32_INTEL;
   case PIPE_PERF_COUNTER_DATA_TYPE_UINT32: return GL_PERFQUERY_COUNTER_DATA_UINT32_INTEL;
   case PIPE_PERF_COUNTER_DATA_TYPE_UINT64: return GL_PERFQUERY_COUNTER_DATA_UINT64_INTEL;
   case PIPE_PERF_COUNTER_DATA_TYPE_FLOAT: return GL_PERFQUERY_COUNTER_DATA_FLOAT_INTEL;
   case PIPE_PERF_COUNTER_DATA_TYPE_DOUBLE: return GL_PERFQUERY_COUNTER_DATA_DOUBLE_INTEL;
   default:
      unreachable("Unknown counter data type");
   }
}

static void
st_GetPerfCounterInfo(struct gl_context *ctx,
                      unsigned query_index,
                      unsigned counter_index,
                      const char **name,
                      const char **desc,
                      GLuint *offset,
                      GLuint *data_size,
                      GLuint *type_enum,
                      GLuint *data_type_enum,
                      GLuint64 *raw_max)
{
   struct pipe_context *pipe = st_context(ctx)->pipe;
   uint32_t pipe_type_enum;
   uint32_t pipe_data_type_enum;

   pipe->get_intel_perf_query_counter_info(pipe, query_index, counter_index,
                                           name, desc, offset, data_size,
                                           &pipe_type_enum, &pipe_data_type_enum, raw_max);
   *type_enum = pipe_counter_type_enum_to_gl_type(pipe_type_enum);
   *data_type_enum = pipe_counter_data_type_to_gl_type(pipe_data_type_enum);
}

static void
st_DeletePerfQuery(struct gl_context *ctx, struct gl_perf_query_object *o)
{
   struct pipe_context *pipe = st_context(ctx)->pipe;

   /* We can assume that the frontend waits for a query to complete
    * before ever calling into here, so we don't have to worry about
    * deleting an in-flight query object.
    */
   assert(!o->Active);
   assert(!o->Used || o->Ready);

   pipe->delete_intel_perf_query(pipe, (struct pipe_query *)o);
}

static bool
st_BeginPerfQuery(struct gl_context *ctx, struct gl_perf_query_object *o)
{
   struct pipe_context *pipe = st_context(ctx)->pipe;

   /* We can assume the frontend hides mistaken attempts to Begin a
    * query object multiple times before its End. Similarly if an
    * application reuses a query object before results have arrived
    * the frontend will wait for prior results so we don't need
    * to support abandoning in-flight results.
    */
   assert(!o->Active);
   assert(!o->Used || o->Ready); /* no in-flight query to worry about */

   return pipe->begin_intel_perf_query(pipe, (struct pipe_query *)o);
}

static void
st_EndPerfQuery(struct gl_context *ctx, struct gl_perf_query_object *o)
{
   struct pipe_context *pipe = st_context(ctx)->pipe;

   pipe->end_intel_perf_query(pipe, (struct pipe_query *)o);
}

static void
st_WaitPerfQuery(struct gl_context *ctx, struct gl_perf_query_object *o)
{
   struct pipe_context *pipe = st_context(ctx)->pipe;

   assert(!o->Ready);

   pipe->wait_intel_perf_query(pipe, (struct pipe_query *)o);
}

static bool
st_IsPerfQueryReady(struct gl_context *ctx, struct gl_perf_query_object *o)
{
   struct pipe_context *pipe = st_context(ctx)->pipe;

   if (o->Ready)
      return true;

   return pipe->is_intel_perf_query_ready(pipe, (struct pipe_query *)o);
}

static bool
st_GetPerfQueryData(struct gl_context *ctx,
                    struct gl_perf_query_object *o,
                    GLsizei data_size,
                    GLuint *data,
                    GLuint *bytes_written)
{
   struct pipe_context *pipe = st_context(ctx)->pipe;

   assert(st_IsPerfQueryReady(ctx, o));

   /* We expect that the frontend only calls this hook when it knows
    * that results are available.
    */
   assert(o->Ready);

   return pipe->get_intel_perf_query_data(pipe, (struct pipe_query *)o,
                                          data_size, data, bytes_written);
}

static struct gl_perf_query_object *
st_NewPerfQueryObject(struct gl_context *ctx, unsigned query_index)
{
   struct pipe_context *pipe = st_context(ctx)->pipe;
   struct pipe_query *q;

   q = pipe->new_intel_perf_query_obj(pipe, query_index);

   return (struct gl_perf_query_object *)q;
}

void st_init_perfquery_functions(struct dd_function_table *functions)
{
   functions->InitPerfQueryInfo = st_InitPerfQueryInfo;
   functions->GetPerfQueryInfo = st_GetPerfQueryInfo;
   functions->GetPerfCounterInfo = st_GetPerfCounterInfo;
   functions->NewPerfQueryObject = st_NewPerfQueryObject;
   functions->DeletePerfQuery = st_DeletePerfQuery;
   functions->BeginPerfQuery = st_BeginPerfQuery;
   functions->EndPerfQuery = st_EndPerfQuery;
   functions->WaitPerfQuery = st_WaitPerfQuery;
   functions->IsPerfQueryReady = st_IsPerfQueryReady;
   functions->GetPerfQueryData = st_GetPerfQueryData;
}