/*
 * Copyright (c) Advanced Micro Devices, Inc. All rights reserved.
 *
 * 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.
 */

#ifndef INCLUDE_ROCM_SMI_ROCM_SMI_COUNTERS_H_
#define INCLUDE_ROCM_SMI_ROCM_SMI_COUNTERS_H_

#include <linux/perf_event.h>

#include <cstdint>
#include <vector>
#include <unordered_set>
#include <string>

#include "rocm_smi/rocm_smi.h"

namespace amd {
namespace smi {
namespace evt {

class RSMIEventGrpHashFunction {
 public:
    size_t operator()(const rsmi_event_group_t& grp) const {
      return static_cast<size_t>(grp);
    }
};

typedef std::unordered_set<rsmi_event_group_t, RSMIEventGrpHashFunction>
                                                            dev_evt_grp_set_t;
void
GetSupportedEventGroups(uint32_t dev_ind, dev_evt_grp_set_t*supported_grps);

struct evnt_info_t {
    uint8_t start_bit;
    uint8_t field_size;
    uint64_t value;
};

struct perf_read_format_t {
    union {
        struct {
            uint64_t value;
            uint64_t enabled_time;
            uint64_t run_time;
        };
        uint64_t values[3];
    };
};

class Event {
 public:
    explicit Event(rsmi_event_type_t event, uint32_t dev_ind);
    ~Event(void);

    int32_t openPerfHandle();
    int32_t startCounter(void);
    int32_t stopCounter(void);
    uint32_t getValue(rsmi_counter_value_t *val);
    uint32_t dev_file_ind(void) const {return dev_file_ind_;}
    uint32_t dev_ind(void) const {return dev_ind_;}

 private:
    // perf_event_attr fields
    std::vector<evnt_info_t> event_info_;

    std::string evt_path_root_;

    rsmi_event_type_t event_type_;
    uint32_t dev_file_ind_;
    uint32_t dev_ind_;
    int32_t fd_;
    perf_event_attr attr_;
    uint64_t prev_cntr_val_;
    int32_t get_event_file_info(void);
    int32_t get_event_type(uint32_t *ev_type);
};


}  // namespace evt
}  // namespace smi
}  // namespace amd

#endif  // INCLUDE_ROCM_SMI_ROCM_SMI_COUNTERS_H_

