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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/import/chips/p9a/procedures/hwp/memory/p9a_mss_utils_to_throttle.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2019,2020 */
/* [+] 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 p9a_mss_utils_to_throttle.C
/// @brief Sets throttles and power attributes for a given utilization value
/// @note TMGT will call this procedure to set the N address operations (commands)
/// allowed within a window of M DRAM clocks given the minimum dram data bus utilization.
//// If input utilization is zero, then safemode values from MRW will be used
///
// *HWP HWP Owner: Andre A. Marin <aamarin@us.ibm.com>
// *HWP HWP Backup: Louis Stermole <stermole@us.ibm.com>
// *HWP Team: Memory
// *HWP Level: 1
// *HWP Consumed by: FSP:HB
#include <p9a_mss_utils_to_throttle.H>
#include <lib/shared/exp_defaults.H>
#include <lib/shared/exp_consts.H>
#include <mss_explorer_attribute_getters.H>
#include <lib/power_thermal/exp_throttle.H>
// fapi2
#include <fapi2.H>
extern "C"
{
///
/// @brief Determines throttle and power values for a given port databus utilization.
/// @param[in] i_targets vector of OCMB_CHIPs to set throttle and power attributes on
/// @return FAPI2_RC_SUCCESS iff ok
/// @note ATTR_MSS_MEM_THROTTLED_N_COMMANDS_PER_SLOT will be set to worst case of all slots passed in
/// @note input ATTR_MSS_DATABUS_UTIL and ATTR_MSS_MEM_WATT_TARGET
/// @note output ATTR_MSS_MEM_THROTTLED_N_COMMANDS_PER_SLOT, ATTR_MSS_MEM_THROTTLED_N_COMMANDS_PER_PORT, and ATTR_MSS_PORT_MAXPOWER
/// @note Does not set runtime throttles or set registers to throttle values
///
fapi2::ReturnCode p9a_mss_utils_to_throttle(const std::vector<fapi2::Target<fapi2::TARGET_TYPE_OCMB_CHIP>>& i_targets)
{
constexpr uint64_t l_min_util = mss::power_thermal::throttle_traits<mss::mc_type::EXPLORER>::MIN_UTIL;
FAPI_INF("Entering p9a_mss_utils_to_throttle");
std::vector<fapi2::Target<fapi2::TARGET_TYPE_MEM_PORT>> l_exceeded_power;
bool l_util_error = false;
for (const auto& l_ocmb : i_targets)
{
if (mss::count_dimm(l_ocmb) == 0)
{
FAPI_INF("Skipping %s because it has no DIMM targets", mss::c_str(l_ocmb));
continue;
}
uint32_t l_max_databus_util = 0;
uint32_t l_dram_clocks = 0;
uint32_t l_safemode_util = 0;
uint32_t l_safemode_throttle_per_port = 0;
uint32_t l_calc_util = 0;
FAPI_TRY(mss::attr::get_mrw_mem_m_dram_clocks(l_dram_clocks));
FAPI_TRY(mss::attr::get_mrw_max_dram_databus_util(l_max_databus_util));
FAPI_TRY(mss::attr::get_mrw_safemode_dram_databus_util(l_safemode_util));
l_safemode_throttle_per_port = mss::power_thermal::calc_n_from_dram_util(
(l_safemode_util / mss::power_thermal::throttle_const::PERCENT_CONVERSION),
l_dram_clocks);
for(const auto& l_port : mss::find_targets<fapi2::TARGET_TYPE_MEM_PORT>(l_ocmb))
{
fapi2::ReturnCode l_rc;
uint32_t l_input_databus_util = 0;
bool l_safemode = false;
// Util attribute set by OCC
FAPI_TRY( mss::attr::get_databus_util(l_port, l_input_databus_util) );
FAPI_INF("Input databus utilization for %s is %d",
mss::c_str(l_port),
l_input_databus_util);
// If input utilization is zero, use mrw safemode throttle values for utilization
// else make sure we're within our maximum utilization limit
FAPI_TRY(mss::power_thermal::calc_utilization<mss::mc_type::EXPLORER>(l_port,
l_input_databus_util,
l_dram_clocks,
l_safemode_throttle_per_port,
l_max_databus_util,
l_calc_util,
l_util_error,
l_safemode));
// Error if utilization is less than MIN_UTIL
// Don't exit, let HWP finish and return error at end
FAPI_ASSERT_NOEXIT( !l_util_error,
fapi2::MSS_MIN_UTILIZATION_ERROR()
.set_INPUT_UTIL_VALUE(l_input_databus_util)
.set_MIN_UTIL_VALUE(l_min_util),
"%s Input utilization (%d) less than minimum utilization allowed (%d)",
mss::c_str(l_port), l_input_databus_util, l_min_util);
// Make a throttle object in order to calculate the port power
mss::power_thermal::throttle<mss::mc_type::EXPLORER> l_throttle(l_port, l_rc);
FAPI_TRY(l_rc, "%s Error calculating mss::power_thermal::throttle constructor in p9a_mss_utils_to_throttles",
mss::c_str(l_port));
FAPI_TRY(l_throttle.calc_slots_and_power(l_calc_util));
FAPI_INF( "%s Calculated N commands per port %d, per slot %d, commands per dram clock window %d, maxpower is %d",
mss::c_str(l_port),
l_throttle.iv_n_port,
l_throttle.iv_n_slot,
l_dram_clocks,
l_throttle.iv_calc_port_maxpower);
FAPI_TRY(mss::attr::set_port_maxpower(l_port, l_throttle.iv_calc_port_maxpower));
FAPI_TRY(mss::attr::set_mem_throttled_n_commands_per_slot(l_port,
(l_safemode) ? l_safemode_throttle_per_port : l_throttle.iv_n_slot));
FAPI_TRY(mss::attr::set_mem_throttled_n_commands_per_port(l_port,
(l_safemode) ? l_safemode_throttle_per_port : l_throttle.iv_n_port));
} // ports
} // ocmbs
// Equalize throttles to prevent variable performance
// Note that we don't do anything with any port that exceed the power limit here, as we don't have an input power limit to go from
FAPI_TRY(mss::power_thermal::equalize_throttles<mss::mc_type::EXPLORER>(i_targets, mss::throttle_type::POWER,
l_exceeded_power));
// Return a failing RC code if we had any input utilization values less than MIN_UTIL
if (l_util_error)
{
fapi2::current_err = fapi2::RC_MSS_MIN_UTILIZATION_ERROR;
}
fapi_try_exit:
return fapi2::current_err;
}
}// extern C
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