/*
Copyright (c) 2020 - present 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.
*/
#include <functional>
#include "rdc_lib/rdc_common.h"
#include "rdc_lib/RdcLogger.h"
#include "rdc_lib/impl/RdcSmiLib.h"

namespace amd {
namespace rdc {

RdcSmiLib::RdcSmiLib(const RdcMetricFetcherPtr& mf): metric_fetcher_(mf) {
}

// Bulk fetch wrapper for the rocm_smi_lib. This will be replaced after
// rocm_smi_lib can support bulk fetch.
rdc_status_t RdcSmiLib::rdc_telemetry_fields_value_get(rdc_gpu_field_t* fields,
            uint32_t fields_count, rdc_field_value_f callback,
            void*  user_data) {
    if (fields == nullptr) {
        return RDC_ST_BAD_PARAMETER;
    }

    RDC_LOG(RDC_DEBUG, "Bulk fetch " << fields_count
            << " fields from rocm_smi_lib.");

    const int BULK_FIELDS_MAX = 16;
    rdc_gpu_field_value_t values[BULK_FIELDS_MAX];
    uint32_t bulk_count = 0;
    for (uint32_t i = 0; i < fields_count; i++) {
        if (bulk_count >= BULK_FIELDS_MAX) {
            rdc_status_t status = callback(values, bulk_count, user_data);
            // When the callback returns errors, stop processing and return.
            if (status != RDC_ST_OK) {
                return status;
            }
            bulk_count = 0;
        }
        values[bulk_count].gpu_index = fields[i].gpu_index;
        metric_fetcher_->fetch_smi_field(
            fields[i].gpu_index,
            static_cast<rdc_field_t>(fields[i].field_id),
            &(values[bulk_count].field_value));
        bulk_count++;
    }
    if (bulk_count != 0) {
        rdc_status_t status = callback(values, bulk_count, user_data);
        if (status != RDC_ST_OK) {
            return status;
        }
        bulk_count = 0;
    }

    return RDC_ST_OK;
}

rdc_status_t RdcSmiLib::rdc_telemetry_fields_watch(rdc_gpu_field_t* fields,
      uint32_t fields_count) {
    // TODO(bill_liu): Not Support yet
    if (fields == nullptr) {
        return RDC_ST_BAD_PARAMETER;
    }
    (void)fields;
    (void)fields_count;
    return RDC_ST_NOT_SUPPORTED;
}

rdc_status_t RdcSmiLib::rdc_telemetry_fields_unwatch(rdc_gpu_field_t* fields,
      uint32_t fields_count) {
    // TODO(bill_liu): Not Support yet
    if (fields == nullptr) {
        return RDC_ST_BAD_PARAMETER;
    }
    (void)fields;
    (void)fields_count;
    return RDC_ST_NOT_SUPPORTED;
}

rdc_status_t RdcSmiLib::rdc_telemetry_fields_query(
     uint32_t field_ids[MAX_NUM_FIELDS],
    uint32_t* field_count) {
    if (field_count == nullptr) {
        return RDC_ST_BAD_PARAMETER;
    }

    // List of fields supported by rocm_smi_lib
    const std::vector<uint32_t> fields{
            RDC_FI_GPU_COUNT, RDC_FI_DEV_NAME, RDC_FI_GPU_CLOCK,
            RDC_FI_MEM_CLOCK, RDC_FI_MEMORY_TEMP, RDC_FI_GPU_TEMP,
            RDC_FI_POWER_USAGE, RDC_FI_PCIE_TX, RDC_FI_PCIE_RX,
            RDC_FI_GPU_UTIL, RDC_FI_GPU_MEMORY_USAGE, RDC_FI_GPU_MEMORY_TOTAL,
            RDC_FI_ECC_CORRECT_TOTAL, RDC_FI_ECC_UNCORRECT_TOTAL,
            RDC_EVNT_XGMI_0_NOP_TX, RDC_EVNT_XGMI_0_REQ_TX,
            RDC_EVNT_XGMI_0_RESP_TX, RDC_EVNT_XGMI_0_BEATS_TX,
            RDC_EVNT_XGMI_1_NOP_TX, RDC_EVNT_XGMI_1_REQ_TX,
            RDC_EVNT_XGMI_1_RESP_TX, RDC_EVNT_XGMI_1_BEATS_TX,
            RDC_EVNT_XGMI_0_THRPUT, RDC_EVNT_XGMI_1_THRPUT
    };
    std::copy(fields.begin(), fields.end(), field_ids);
    *field_count = fields.size();

    return RDC_ST_OK;
}

}  // namespace rdc
}  // namespace amd