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/* IBM_PROLOG_BEGIN_TAG
* This is an automatically generated prolog.
*
* $Source: src/usr/hwpf/hwp/mc_init/mss_volt/mss_volt.C $
*
* IBM CONFIDENTIAL
*
* COPYRIGHT International Business Machines Corp. 2012
*
* p1
*
* Object Code Only (OCO) source materials
* Licensed Internal Code Source Materials
* IBM HostBoot Licensed Internal Code
*
* The source code for this program is not published or other-
* wise divested of its trade secrets, irrespective of what has
* been deposited with the U.S. Copyright Office.
*
* Origin: 30
*
* IBM_PROLOG_END_TAG
*/
/* File mss_volt.C created by JEFF SABROWSKI on Fri 21 Oct 2011. */
//------------------------------------------------------------------------------
// *! (C) Copyright International Business Machines Corp. 2007
// *! All Rights Reserved -- Property of IBM
// *! *** IBM Confidential ***
//------------------------------------------------------------------------------
// *! TITLE : mss_volt.C
// *! DESCRIPTION : Tools for centaur procedures
// *! OWNER NAME : Jeff Sabrowski (jsabrow@us.ibm.com)
// *! BACKUP NAME :
// #! ADDITIONAL COMMENTS :
//
// General purpose funcs
//------------------------------------------------------------------------------
// Don't forget to create CVS comments when you check in your changes!
//------------------------------------------------------------------------------
// CHANGE HISTORY:
//------------------------------------------------------------------------------
// Version:| Author: | Date: | Comment:
//---------|----------|----------|-----------------------------------------------
// 1.0 | jsabrow | 09/30/11 | Initial draft.
// 1.1 | jsabrow | 12/13/11 | This version compiles. Attributes dont work yet.
// 1.3 | bellows | 12/21/11 | fapiGetAssociatedDimms funciton does not work, added quick exit
// 1.4 | jsabrow | 02/13/12 | Updates for code review
// 1.5 | jsabrow | 03/26/12 | Updates for code review
// 1.8 | jdsloat | 04/26/12 | fixed 1.5V issue
// 1.9 | jdsloat | 05/08/12 | Removed debug message
// 1.10 | jdsloat | 05/09/12 | Fixed typo
// This procedure takes a vector of Centaurs behind a voltage domain,
// reads in supported DIMM voltages from SPD and determines optimal
// voltage bin for the DIMM voltage domain.
// supported voltage bins: DDR3: 1.35 DDR4: 1.25V (expected)
//----------------------------------------------------------------------
// Includes - FAPI
//----------------------------------------------------------------------
#include <fapi.H>
#include <mss_volt.H>
fapi::ReturnCode mss_volt(std::vector<fapi::Target> & i_targets_memb)
{
fapi::ReturnCode l_rc;
uint8_t l_spd_dramtype=0;
uint8_t l_spd_volts=0;
uint8_t l_spd_volts_all_dimms=0x06; //start assuming all voltages supported
uint8_t l_dram_ddr3_found_flag=0;
uint8_t l_dram_ddr4_found_flag=0;
uint32_t l_selected_dram_voltage=0; //this gets written into all centaurs when done.
// Iterate through the list of centaurs
for (uint32_t i=0; i < i_targets_memb.size(); i++)
{
std::vector<fapi::Target> l_mbaChiplets;
// Get associated MBA's on this centaur
l_rc=fapiGetChildChiplets(i_targets_memb[i], fapi::TARGET_TYPE_MBA_CHIPLET, l_mbaChiplets);
if (l_rc) return l_rc;
// Loop through the 2 MBA's
for (uint32_t j=0; j < l_mbaChiplets.size(); j++)
{
std::vector<fapi::Target> l_dimm_targets;
// Get a vector of DIMM targets
l_rc = fapiGetAssociatedDimms(l_mbaChiplets[j], l_dimm_targets);
if (l_rc) return l_rc;
for (uint32_t k=0; k < l_dimm_targets.size(); k++)
{
l_rc = FAPI_ATTR_GET(ATTR_SPD_DRAM_DEVICE_TYPE, &l_dimm_targets[k], l_spd_dramtype);
if (l_rc) return l_rc;
l_rc = FAPI_ATTR_GET(ATTR_SPD_MODULE_NOMINAL_VOLTAGE, &l_dimm_targets[k], l_spd_volts);
if (l_rc) return l_rc;
// spd_volts: bit0= NOT 1.5V bit1=1.35V bit2=1.25V, assume a 1.20V in future for DDR4
// check for supported voltage/dram type combo DDR3=12, DDR4=13
if (l_spd_dramtype == fapi::ENUM_ATTR_SPD_DRAM_DEVICE_TYPE_DDR3)
{
l_dram_ddr3_found_flag=1;
}
else if (l_spd_dramtype == fapi::ENUM_ATTR_SPD_DRAM_DEVICE_TYPE_DDR4)
{
l_dram_ddr4_found_flag=1;
}
else
{
uint8_t &DEVICE_TYPE = l_spd_dramtype;
FAPI_ERR("Unknown DRAM Device Type 0x%x", l_spd_dramtype);
FAPI_SET_HWP_ERROR(l_rc, RC_MSS_VOLT_UNRECOGNIZED_DRAM_DEVICE_TYPE);
return l_rc;
}
//AND dimm voltage capabilities together to find aggregate voltage support on all dimms
l_spd_volts_all_dimms = l_spd_volts_all_dimms & l_spd_volts;
}
}
}
// now we figure out if we have a supported ddr type and voltage
// note: only support DDR3=1.35V and DDR4=1.2xV
if (l_dram_ddr3_found_flag && l_dram_ddr4_found_flag)
{
FAPI_ERR("mss_volt: DDR3 and DDR4 mixing not allowed");
FAPI_SET_HWP_ERROR(l_rc, RC_MSS_VOLT_DDR_TYPE_MIXING_UNSUPPORTED);
return l_rc;
}
if (l_dram_ddr3_found_flag && ((l_spd_volts_all_dimms & fapi::ENUM_ATTR_SPD_MODULE_NOMINAL_VOLTAGE_OP1_35) == fapi::ENUM_ATTR_SPD_MODULE_NOMINAL_VOLTAGE_OP1_35))
{
l_selected_dram_voltage=1350;
}
else if (l_dram_ddr4_found_flag && ((l_spd_volts_all_dimms & fapi::ENUM_ATTR_SPD_MODULE_NOMINAL_VOLTAGE_OP1_2X) == fapi::ENUM_ATTR_SPD_MODULE_NOMINAL_VOLTAGE_OP1_2X))
{
l_selected_dram_voltage=1200;
}
else if ((l_spd_volts_all_dimms & fapi::ENUM_ATTR_SPD_MODULE_NOMINAL_VOLTAGE_NOTOP1_5) != fapi::ENUM_ATTR_SPD_MODULE_NOMINAL_VOLTAGE_NOTOP1_5)
{
l_selected_dram_voltage=1500;
}
else
{
FAPI_ERR("One or more DIMMs do not support required voltage for DIMM type");
FAPI_SET_HWP_ERROR(l_rc, RC_MSS_VOLT_DDR_TYPE_REQUIRED_VOLTAGE);
return l_rc;
}
// Iterate through the list of centaurs again, to update ATTR
for (uint32_t i=0; i < i_targets_memb.size(); i++)
{
l_rc = FAPI_ATTR_SET(ATTR_MSS_VOLT, &i_targets_memb[i], l_selected_dram_voltage);
FAPI_INF( "mss_volt calculation complete. MSS_VOLT: %d", l_selected_dram_voltage);
if (l_rc) return l_rc;
}
return l_rc;
}
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