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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/usr/ipmiext/ipmidcmi.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2015,2018 */
/* [+] 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 ipmidcmi.C
* @brief IPMI DCMI command extensions
*/
#include <errl/errlentry.H>
#include <errl/errlmanager.H>
#include <ipmi/ipmiif.H>
#include <ipmi/ipmisensor.H>
#include <ipmi/ipmi_reasoncodes.H>
extern trace_desc_t * g_trac_ipmi;
namespace SENSOR
{
enum dcmi_cc
{
POWER_LIMIT_ACTIVE = 0x00,
POWER_LIMIT_NOT_ACTIVE = 0x80,
};
// fetch the user defined power limit stored on the BMC
// using the DCMI Get Power Limit command
errlHndl_t getUserPowerLimit( uint16_t &o_powerLimit, bool &o_limitActive )
{
o_powerLimit = 0;
// assume the limit has not been activated
o_limitActive = false;
errlHndl_t l_err = NULL;
// per DCMI spec data size is 3 bytes
size_t len = 3;
//create request data buffer
uint8_t* data = new uint8_t[len];
IPMI::completion_code cc = IPMI::CC_UNKBAD;
data[0] = 0xDC; // Group Extension Identification
data[1] = 0x00; // reserved
data[2] = 0x00; // reserved
l_err = IPMI::sendrecv(IPMI::get_power_limit(), cc, len, data);
SENSOR::dcmi_cc l_cc = static_cast<SENSOR::dcmi_cc>(cc);
if( l_err == NULL )
{
// make sure the completion code is good, then read the bytes
if( (l_cc == POWER_LIMIT_NOT_ACTIVE) ||
(l_cc == POWER_LIMIT_ACTIVE) )
{
// from the dcmi spec
// byte 1 completion code
// byte 2 0xDC
// byte 3:4 reserved
// byte 5 exception actions
// byte 6:7 power limit
// data[0] is pointing at byte 2 of the dcmi spec description
// so our offsets will be off by two below
o_powerLimit = data[5];
o_powerLimit = ( o_powerLimit << 8 ) + data[4];
// fetch the derating factor from the BMC, then apply it to
// the value returned in the getPowerLimit command
SENSOR::getSensorReadingData o_sensorData;
// derating factor is held in the system target
SENSOR::SensorBase(
TARGETING::SENSOR_NAME_DERATING_FACTOR,
NULL ).readSensorData( o_sensorData );
// derate the power limit based on the returned value of the
// sensor - derating factor is returned as a % value and is
// stored in the event_status field.
o_powerLimit = ( static_cast<uint64_t>(o_powerLimit) *
o_sensorData.event_status)/100;
TRACFCOMP(g_trac_ipmi,"Derating factor = %i",o_sensorData.event_status);
TRACFCOMP(g_trac_ipmi,"Power limit = 0x%i",o_powerLimit);
TRACFCOMP(g_trac_ipmi,"Power limit is %s", ((cc) ? "not active": "active"));
// the completion code also tells us if the limit is active
if(l_cc == POWER_LIMIT_ACTIVE )
{
o_limitActive = true;
}
}
else
{
TRACFCOMP(g_trac_ipmi,"bad completion code from BMC=0x%x",cc);
/*@
* @errortype ERRL_SEV_UNRECOVERABLE
* @moduleid IPMI::MOD_IPMIDCMI
* @reasoncode IPMI::RC_DCMI_CMD_FAILED
* @userdata1 BMC IPMI Completion code.
* @devdesc Request to get power limit information
* failed
* @custdesc The DCMI command to retrieve the power limit
* data from the BMC has failed, the user
* defined power limit cannot be applied.
*
*/
l_err = new ERRORLOG::ErrlEntry(
ERRORLOG::ERRL_SEV_UNRECOVERABLE,
IPMI::MOD_IPMIDCMI,
IPMI::RC_DCMI_CMD_FAILED,
static_cast<uint64_t>(cc),0, true);
l_err->collectTrace(IPMI_COMP_NAME);
}
delete[] data;
}
return l_err;
}
}; // end name space
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