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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/import/chips/centaur/procedures/hwp/memory/p9c_mss_bulk_pwr_throttles.H $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2016,2018 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
/// @file p9c_mss_bulk_pwr_throttles.H
/// @brief Sets the throttle attributes based on a power limit for the dimms on the channel pair
///
/// *HWP HWP Owner: Andre Marin <aamaring@us.ibm.com>
/// *HWP HWP Backup: Mike Pardeik <pardeik@us.ibm.com>
/// *HWP Team: Memory
/// *HWP Level: 2
/// *HWP Consumed by: HB
///
#ifndef MSS_BULK_PWR_THROTTLES_H_
#define MSS_BULK_PWR_THROTTLES_H_
//------------------------------------------------------------------------------
// Includes
//------------------------------------------------------------------------------
#include <fapi2.H>
// Units c%, set to 100%
constexpr uint32_t MAX_UTIL = 10000;
// Conversion factor to convert from address bus utilization to data bus utilization
constexpr uint8_t ADDR_TO_DATA_UTIL_CONVERSION = 4;
// Conversion factor to convert from centi percent to percent
constexpr uint8_t PERCENT_CONVERSION = 100;
///
/// @brief This function will convert a value with units of centi percent to percent
/// @tparam T the type to convert into a percentage
/// @param[in] i_value: value in centi percent
/// @return the value in percent
///
template<typename T>
inline T convert_to_percent(const T i_value)
{
return (i_value / PERCENT_CONVERSION);
}
typedef fapi2::ReturnCode (*p9c_mss_bulk_pwr_throttles_FP_t)
(
const fapi2::Target<fapi2::TARGET_TYPE_MBA>&
);
typedef fapi2::ReturnCode (*p9c_mss_bulk_pwr_channel_pair_power_curve_FP_t)
(
const fapi2::Target<fapi2::TARGET_TYPE_MBA>&,
double&,
double&
);
typedef fapi2::ReturnCode (*p9c_mss_bulk_pwr_util_to_throttle_power_FP_t)
(
const fapi2::Target<fapi2::TARGET_TYPE_MBA>&,
double,
const double,
const double,
const bool
);
extern "C"
{
/// @brief Set dimm and channel throttle attributes based on available centaur mba port power
/// @param[in] i_target_mba: MBA Target
/// @return ReturnCode
fapi2::ReturnCode p9c_mss_bulk_pwr_throttles(const fapi2::Target<fapi2::TARGET_TYPE_MBA>& i_target_mba);
///
/// @brief This function determines the channel pair power slope and intercept values to use
/// to calculate the channel pair power (ie. power of dimms attached to channel pair)
/// @param[in] i_target_mba: MBA Target
/// @param[out] o_channel_power_slope channel pair power slope
/// @param[out] o_channel_power_intercept channel pair power intercept
/// @return fapi2::ReturnCode
///
fapi2::ReturnCode p9c_mss_bulk_pwr_channel_pair_power_curve(const fapi2::Target<fapi2::TARGET_TYPE_MBA>& i_target_mba,
double& o_channel_power_slope,
double& o_channel_power_intercept);
///
/// @brief This function determines the memory throttle and channel pair power
/// attribute values for a given dram data bus utilization value
/// @param[in] i_target_mba: MBA Target
/// @param[in] i_utilization Dram data bus utilization value (units %)
/// @param[in] i_channel_power_slope channel pair power slope
/// @param[in] i_channel_power_intercept channel pair power
/// @param[in] i_utilization_is_a_min_value tells us if i_utilization is a min or max target to meet (0=max, 1=min)
/// @return fapi2::ReturnCode
///
fapi2::ReturnCode p9c_mss_bulk_pwr_util_to_throttle_power(const fapi2::Target<fapi2::TARGET_TYPE_MBA>& i_target_mba,
double i_utilization,
const double i_channel_power_slope,
const double i_channel_power_intercept,
const bool i_utilization_is_a_min_value);
///
/// @brief This function determines the memory throttle values
/// for a given dram data bus utilization value
/// @param[in] i_target_mba: MBA Target
/// @param[in] i_utilization Input Dram data bus utilization value (units %)
/// @param[in] i_max_util Max Dram data bus utilization value (units %)
/// @param[out] o_throttle_n_per_mba N memory throttle for per mba throttles
/// @param[out] o_throttle_n_per_chip N memory throttle for per mba throttles
/// @param[out] o_throttle_adder N throttle adder to use to meet utilization min or max target
/// @param[in] i_utilization_is_a_min_value tells us if i_utilization is a min or max target to meet (0=max, 1=min)
/// @return fapi2::ReturnCode
///
fapi2::ReturnCode p9c_mss_bulk_pwr_util_to_throttle(const fapi2::Target<fapi2::TARGET_TYPE_MBA>& i_target_mba,
const double i_utilization,
const double i_max_util,
uint32_t& o_throttle_n_per_mba,
uint32_t& o_throttle_n_per_chip,
uint8_t& o_throttle_adder,
const bool i_utilization_is_a_min_value);
} // extern "C"
#endif // MSS_BULK_PWR_THROTTLES_H_
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