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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/import/chips/p9/procedures/hwp/memory/p9_mss_utils_to_throttle.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2015,2016 */
/* [+] 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 p9_mss_utils_to_throttle.C
/// @brief Sets throttles
/// 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.
///
// *HWP HWP Owner: Jacob Harvey <jlharvey@us.ibm.com>
// *HWP HWP Backup: Brian Silver <bsilver@us.ibm.com>
// *HWP Team: Memory
// *HWP Level: 2
// *HWP Consumed by: FSP:HB
#include <p9_mss_utils_to_throttle.H>
// fapi2
#include <fapi2.H>
// mss lib
#include <lib/power_thermal/throttle.H>
#include <lib/utils/index.H>
#include <lib/utils/find.H>
#include <lib/utils/conversions.H>
#include <lib/power_thermal/throttle.H>
#include <lib/mss_attribute_accessors.H>
#include <lib/utils/count_dimm.H>
using fapi2::TARGET_TYPE_MCS;
using fapi2::TARGET_TYPE_MCA;
using fapi2::TARGET_TYPE_DIMM;
extern "C"
{
///
/// @brief Sets number commands allowed within a given port databus utilization.
/// @param[in] i_targets vector of MCS to set throttle attributes on
/// @return FAPI2_RC_SUCCESS iff ok
/// @note throttle_per_slot will be equalized so all throttles coming out will be equal to worst case
///
fapi2::ReturnCode p9_mss_utils_to_throttle( const std::vector< fapi2::Target<TARGET_TYPE_MCS> >& i_targets )
{
for( const auto& l_mcs : i_targets )
{
uint32_t l_input_databus_util [mss::PORTS_PER_MCS] = {};
uint32_t l_max_databus_util = {};
uint32_t l_dram_clocks = 0;
uint16_t l_n_port[mss::PORTS_PER_MCS] = {};
uint16_t l_n_slot[mss::PORTS_PER_MCS] = {};
uint32_t l_max_power[mss::PORTS_PER_MCS] = {};
FAPI_TRY( mss::mrw_mem_m_dram_clocks(l_dram_clocks) );
//Util attribute set by OCC
FAPI_TRY( mss::databus_util(l_mcs, l_input_databus_util) );
FAPI_TRY( mss::mrw_max_dram_databus_util(l_max_databus_util));
FAPI_INF("Input databus utilization is %d and %d", l_input_databus_util[0], l_input_databus_util[1]);
for( const auto& l_mca : mss::find_targets<TARGET_TYPE_MCA>(l_mcs) )
{
const auto l_port_num = mss::index( l_mca );
//make sure 0 < input_utilization <= max_utilization
uint32_t l_databus_util = ( l_input_databus_util[l_port_num] != 0) ?
std::min(l_input_databus_util[l_port_num], l_max_databus_util) : mss::power_thermal::MIN_UTIL;
//Make a throttle object in order to calculate the port power
fapi2::ReturnCode l_rc;
mss::power_thermal::throttle l_throttle (l_mca, l_rc);
FAPI_TRY(l_rc, "Error calculating mss::power_thermal::throttle constructor in p9_mss_utils_to_throttles");
FAPI_INF( "MRW dram clock window: %d, databus utilization: %d",
l_dram_clocks,
l_databus_util);
l_throttle.calc_slots_and_power(l_databus_util);
FAPI_INF( "Calculated N commands per port [%d] = %d commands, maxpower is %d",
l_port_num,
l_throttle.iv_n_port,
l_throttle.iv_calc_port_maxpower);
l_n_slot[l_port_num] = l_throttle.iv_n_slot;
l_n_port[l_port_num] = l_throttle.iv_n_port;
l_max_power[l_port_num] = l_throttle.iv_calc_port_maxpower;
}// end for
FAPI_TRY( FAPI_ATTR_SET(fapi2::ATTR_MSS_PORT_MAXPOWER,
l_mcs,
l_max_power) );
FAPI_TRY( FAPI_ATTR_SET(fapi2::ATTR_MSS_MEM_THROTTLED_N_COMMANDS_PER_SLOT,
l_mcs,
l_n_slot) );
FAPI_TRY( FAPI_ATTR_SET(fapi2::ATTR_MSS_MEM_THROTTLED_N_COMMANDS_PER_PORT,
l_mcs,
l_n_port) );
}
//equalize throttles to prevent variable performance
FAPI_TRY( mss::power_thermal::equalize_throttles (i_targets));
fapi_try_exit:
return fapi2::current_err;
}
}// extern C
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