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/**
* Copyright © 2017 IBM Corporation
*
* 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.
*/
#include <map>
#include <memory>
#include <phosphor-logging/elog.hpp>
#include <phosphor-logging/log.hpp>
#include <elog-errors.hpp>
#include <org/open_power/Witherspoon/Fault/error.hpp>
#include <xyz/openbmc_project/Common/Device/error.hpp>
#include "names_values.hpp"
#include "ucd90160.hpp"
#include "utility.hpp"
namespace witherspoon
{
namespace power
{
using namespace std::string_literals;
const auto MFR_STATUS = "mfr_status"s;
const auto DEVICE_NAME = "UCD90160"s;
const auto DRIVER_NAME = "ucd9000"s;
constexpr auto NUM_PAGES = 16;
namespace fs = std::experimental::filesystem;
using namespace gpio;
using namespace pmbus;
using namespace phosphor::logging;
namespace device_error = sdbusplus::xyz::openbmc_project::
Common::Device::Error;
namespace power_error = sdbusplus::org::open_power::
Witherspoon::Fault::Error;
UCD90160::UCD90160(size_t instance, sdbusplus::bus::bus& bus) :
Device(DEVICE_NAME, instance),
interface(std::get<ucd90160::pathField>(
deviceMap.find(instance)->second),
DRIVER_NAME,
instance),
gpioDevice(findGPIODevice(interface.path())),
bus(bus)
{
}
void UCD90160::onFailure()
{
try
{
auto voutError = checkVOUTFaults();
auto pgoodError = checkPGOODFaults(false);
//Not a voltage or PGOOD fault, but we know something
//failed so still create an error log.
if (!voutError && !pgoodError)
{
createPowerFaultLog();
}
}
catch (device_error::ReadFailure& e)
{
if (!accessError)
{
commit<device_error::ReadFailure>();
accessError = true;
}
}
}
void UCD90160::analyze()
{
try
{
//Note: Voltage faults are always fatal, so they just
//need to be analyzed in onFailure().
checkPGOODFaults(true);
}
catch (device_error::ReadFailure& e)
{
if (!accessError)
{
commit<device_error::ReadFailure>();
accessError = true;
}
}
}
uint16_t UCD90160::readStatusWord()
{
return interface.read(STATUS_WORD, Type::Debug);
}
uint32_t UCD90160::readMFRStatus()
{
return interface.read(MFR_STATUS, Type::DeviceDebug);
}
bool UCD90160::checkVOUTFaults()
{
bool errorCreated = false;
auto statusWord = readStatusWord();
//The status_word register has a summary bit to tell us
//if each page even needs to be checked
if (!(statusWord & status_word::VOUT_FAULT))
{
return errorCreated;
}
for (size_t page = 0; page < NUM_PAGES; page++)
{
if (isVoutFaultLogged(page))
{
continue;
}
auto statusVout = interface.insertPageNum(STATUS_VOUT, page);
uint8_t vout = interface.read(statusVout, Type::Debug);
//Any bit on is an error
if (vout)
{
auto& railNames = std::get<ucd90160::railNamesField>(
deviceMap.find(getInstance())->second);
auto railName = railNames.at(page);
util::NamesValues nv;
nv.add("STATUS_WORD", statusWord);
nv.add("STATUS_VOUT", vout);
nv.add("MFR_STATUS", readMFRStatus());
using metadata = org::open_power::Witherspoon::Fault::
PowerSequencerVoltageFault;
report<power_error::PowerSequencerVoltageFault>(
metadata::RAIL(page),
metadata::RAIL_NAME(railName.c_str()),
metadata::RAW_STATUS(nv.get().c_str()));
setVoutFaultLogged(page);
errorCreated = true;
}
}
return errorCreated;
}
bool UCD90160::checkPGOODFaults(bool polling)
{
bool errorCreated = false;
//While PGOOD faults could show up in MFR_STATUS (and we could then
//check the summary bit in STATUS_WORD first), they are edge triggered,
//and as the device driver sends a clear faults command every time we
//do a read, we will never see them. So, we'll have to just read the
//real time GPI status GPIO.
//Check only the GPIs configured on this system.
auto& gpiConfigs = std::get<ucd90160::gpiConfigField>(
deviceMap.find(getInstance())->second);
for (const auto& gpiConfig : gpiConfigs)
{
auto gpiNum = std::get<ucd90160::gpiNumField>(gpiConfig);
auto doPoll = std::get<ucd90160::pollField>(gpiConfig);
//Can skip this one if there is already an error on this input,
//or we are polling and these inputs don't need to be polled
//(because errors on them are fatal).
if (isPGOODFaultLogged(gpiNum) || (polling && !doPoll))
{
continue;
}
//The real time status is read via the pin ID
auto pinID = std::get<ucd90160::pinIDField>(gpiConfig);
auto gpio = gpios.find(pinID);
Value gpiStatus;
try
{
//The first time through, create the GPIO objects
if (gpio == gpios.end())
{
gpios.emplace(
pinID,
std::make_unique<GPIO>(
gpioDevice, pinID, Direction::input));
gpio = gpios.find(pinID);
}
gpiStatus = gpio->second->read();
}
catch (std::exception& e)
{
if (!accessError)
{
log<level::ERR>(e.what());
accessError = true;
}
continue;
}
if (gpiStatus == Value::low)
{
//There may be some extra analysis we can do to narrow the
//error down further. Note that finding an error here won't
//prevent us from checking this GPI again.
errorCreated = doExtraAnalysis(gpiConfig);
if (errorCreated)
{
continue;
}
auto& gpiName = std::get<ucd90160::gpiNameField>(gpiConfig);
auto status = (gpiStatus == Value::low) ? 0 : 1;
util::NamesValues nv;
nv.add("STATUS_WORD", readStatusWord());
nv.add("MFR_STATUS", readMFRStatus());
nv.add("INPUT_STATUS", status);
using metadata = org::open_power::Witherspoon::Fault::
PowerSequencerPGOODFault;
report<power_error::PowerSequencerPGOODFault>(
metadata::INPUT_NUM(gpiNum),
metadata::INPUT_NAME(gpiName.c_str()),
metadata::RAW_STATUS(nv.get().c_str()));
setPGOODFaultLogged(gpiNum);
errorCreated = true;
}
}
return errorCreated;
}
void UCD90160::createPowerFaultLog()
{
util::NamesValues nv;
nv.add("STATUS_WORD", readStatusWord());
nv.add("MFR_STATUS", readMFRStatus());
using metadata = org::open_power::Witherspoon::Fault::
PowerSequencerFault;
report<power_error::PowerSequencerFault>(
metadata::RAW_STATUS(nv.get().c_str()));
}
fs::path UCD90160::findGPIODevice(const fs::path& path)
{
fs::path gpioDevicePath;
//In the driver directory, look for a subdirectory
//named gpiochipX, where X is some number. Then
//we'll access the GPIO at /dev/gpiochipX.
if (fs::is_directory(path))
{
for (auto& f : fs::directory_iterator(path))
{
if (f.path().filename().string().find("gpiochip") !=
std::string::npos)
{
gpioDevicePath = "/dev" / f.path().filename();
break;
}
}
}
if (gpioDevicePath.empty())
{
log<level::ERR>("Could not find GPIO device path",
entry("BASE_PATH=%s", path.c_str()));
}
return gpioDevicePath;
}
bool UCD90160::doExtraAnalysis(const ucd90160::GPIConfig& config)
{
auto type = std::get<ucd90160::extraAnalysisField>(config);
if (type == ucd90160::extraAnalysisType::none)
{
return false;
}
//Currently the only extra analysis to do is to check other GPIOs.
return doGPIOAnalysis(type);
}
bool UCD90160::doGPIOAnalysis(ucd90160::extraAnalysisType type)
{
bool errorFound = false;
bool shutdown = false;
const auto& analysisConfig = std::get<ucd90160::gpioAnalysisField>(
deviceMap.find(getInstance())->second);
auto gpioConfig = analysisConfig.find(type);
if (gpioConfig == analysisConfig.end())
{
return errorFound;
}
auto path = std::get<ucd90160::gpioDevicePathField>(
gpioConfig->second);
//The /dev/gpiochipX device
auto device = findGPIODevice(path);
//The GPIO value of the fault condition
auto polarity = std::get<ucd90160::gpioPolarityField>(
gpioConfig->second);
//The GPIOs to check
auto& gpios = std::get<ucd90160::gpioDefinitionField>(
gpioConfig->second);
for (const auto& gpio : gpios)
{
gpio::Value value;
try
{
GPIO g{device,
std::get<ucd90160::gpioNumField>(gpio),
Direction::input};
value = g.read();
}
catch (std::exception& e)
{
if (!gpioAccessError)
{
//GPIO only throws InternalErrors - not worth committing.
log<level::ERR>(
"GPIO read failed while analyzing a power fault",
entry("CHIP_PATH=%s", path.c_str()));
gpioAccessError = true;
}
continue;
}
if (value == polarity)
{
errorFound = true;
auto part = std::get<ucd90160::gpioCalloutField>(gpio);
PartCallout callout{type, part};
if (isPartCalledOut(callout))
{
continue;
}
//Look up and call the error creation function
auto logError = std::get<ucd90160::errorFunctionField>(
gpioConfig->second);
logError(*this, part);
//Save the part callout so we don't call it out again
setPartCallout(callout);
//Some errors (like overtemps) require a shutdown
auto actions = static_cast<uint32_t>(
std::get<ucd90160::optionFlagsField>(gpioConfig->second));
if (actions & static_cast<decltype(actions)>(
ucd90160::optionFlags::shutdownOnFault))
{
shutdown = true;
}
}
}
if (shutdown)
{
util::powerOff(bus);
}
return errorFound;
}
void UCD90160::gpuPGOODError(const std::string& callout)
{
util::NamesValues nv;
nv.add("STATUS_WORD", readStatusWord());
nv.add("MFR_STATUS", readMFRStatus());
using metadata = org::open_power::Witherspoon::Fault::GPUPowerFault;
report<power_error::GPUPowerFault>(
metadata::RAW_STATUS(nv.get().c_str()),
metadata::GPU(callout.c_str()));
}
void UCD90160::gpuOverTempError(const std::string& callout)
{
util::NamesValues nv;
nv.add("STATUS_WORD", readStatusWord());
nv.add("MFR_STATUS", readMFRStatus());
using metadata = org::open_power::Witherspoon::Fault::GPUOverTemp;
report<power_error::GPUOverTemp>(
metadata::RAW_STATUS(nv.get().c_str()),
metadata::GPU(callout.c_str()));
}
}
}