blob: 860173382dc014f7a17994dadcb44b7b7d0a3afe [file] [log] [blame]
/**
* Copyright 2017 Google Inc.
*
* 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 "dbushelper.hpp"
#include "dbushelper_interface.hpp"
#include "dbusutil.hpp"
#include <phosphor-logging/log.hpp>
#include <sdbusplus/bus.hpp>
#include <map>
#include <string>
#include <variant>
#include <vector>
namespace pid_control
{
using Property = std::string;
using Value = std::variant<int64_t, double, std::string, bool>;
using PropertyMap = std::map<Property, Value>;
using namespace phosphor::logging;
/* TODO(venture): Basically all phosphor apps need this, maybe it should be a
* part of sdbusplus. There is an old version in libmapper.
*/
std::string DbusHelper::getService(const std::string& intf,
const std::string& path)
{
auto mapper =
_bus.new_method_call("xyz.openbmc_project.ObjectMapper",
"/xyz/openbmc_project/object_mapper",
"xyz.openbmc_project.ObjectMapper", "GetObject");
mapper.append(path);
mapper.append(std::vector<std::string>({intf}));
std::map<std::string, std::vector<std::string>> response;
try
{
auto responseMsg = _bus.call(mapper);
responseMsg.read(response);
}
catch (const sdbusplus::exception::SdBusError& ex)
{
log<level::ERR>("ObjectMapper call failure",
entry("WHAT=%s", ex.what()));
throw;
}
if (response.begin() == response.end())
{
throw std::runtime_error("Unable to find Object: " + path);
}
return response.begin()->first;
}
void DbusHelper::getProperties(const std::string& service,
const std::string& path, SensorProperties* prop)
{
auto pimMsg = _bus.new_method_call(service.c_str(), path.c_str(),
propertiesintf, "GetAll");
pimMsg.append(sensorintf);
PropertyMap propMap;
try
{
auto valueResponseMsg = _bus.call(pimMsg);
valueResponseMsg.read(propMap);
}
catch (const sdbusplus::exception::SdBusError& ex)
{
log<level::ERR>("GetAll Properties Failed",
entry("WHAT=%s", ex.what()));
throw;
}
// The PropertyMap returned will look like this because it's always
// reading a Sensor.Value interface.
// a{sv} 3:
// "Value" x 24875
// "Unit" s "xyz.openbmc_project.Sensor.Value.Unit.DegreesC"
// "Scale" x -3
// If no error was set, the values should all be there.
auto findUnit = propMap.find("Unit");
if (findUnit != propMap.end())
{
prop->unit = std::get<std::string>(findUnit->second);
}
auto findScale = propMap.find("Scale");
auto findMax = propMap.find("MaxValue");
auto findMin = propMap.find("MinValue");
prop->min = 0;
prop->max = 0;
prop->scale = 0;
if (findScale != propMap.end())
{
prop->scale = std::get<int64_t>(findScale->second);
}
if (findMax != propMap.end())
{
prop->max = std::visit(VariantToDoubleVisitor(), findMax->second);
}
if (findMin != propMap.end())
{
prop->min = std::visit(VariantToDoubleVisitor(), findMin->second);
}
prop->value = std::visit(VariantToDoubleVisitor(), propMap["Value"]);
return;
}
bool DbusHelper::thresholdsAsserted(const std::string& service,
const std::string& path)
{
auto critical = _bus.new_method_call(service.c_str(), path.c_str(),
propertiesintf, "GetAll");
critical.append(criticalThreshInf);
PropertyMap criticalMap;
try
{
auto msg = _bus.call(critical);
msg.read(criticalMap);
}
catch (sdbusplus::exception_t&)
{
// do nothing, sensors don't have to expose critical thresholds
return false;
}
auto findCriticalLow = criticalMap.find("CriticalAlarmLow");
auto findCriticalHigh = criticalMap.find("CriticalAlarmHigh");
bool asserted = false;
if (findCriticalLow != criticalMap.end())
{
asserted = std::get<bool>(findCriticalLow->second);
}
// as we are catching properties changed, a sensor could theoretically jump
// from one threshold to the other in one event, so check both thresholds
if (!asserted && findCriticalHigh != criticalMap.end())
{
asserted = std::get<bool>(findCriticalHigh->second);
}
return asserted;
}
} // namespace pid_control