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#include <powercap.hpp>
#include <phosphor-logging/log.hpp>
namespace open_power
{
namespace occ
{
namespace powercap
{
constexpr auto PCAP_PATH = "/xyz/openbmc_project/control/host0/power_cap";
constexpr auto PCAP_INTERFACE = "xyz.openbmc_project.Control.Power.Cap";
constexpr auto MAPPER_BUSNAME = "xyz.openbmc_project.ObjectMapper";
constexpr auto MAPPER_PATH = "/xyz/openbmc_project/object_mapper";
constexpr auto MAPPER_INTERFACE = "xyz.openbmc_project.ObjectMapper";
constexpr auto POWER_CAP_PROP = "PowerCap";
constexpr auto POWER_CAP_ENABLE_PROP = "PowerCapEnable";
using namespace phosphor::logging;
std::string PowerCap::getService(std::string path,
std::string interface)
{
auto mapper = bus.new_method_call(MAPPER_BUSNAME,
MAPPER_PATH,
MAPPER_INTERFACE,
"GetObject");
mapper.append(path, std::vector<std::string>({interface}));
auto mapperResponseMsg = bus.call(mapper);
if (mapperResponseMsg.is_method_error())
{
log<level::ERR>("Error in mapper call",
entry("PATH=%s", path.c_str()),
entry("INTERFACE=%s", interface.c_str()));
// TODO openbmc/openbmc#851 - Once available, throw returned error
throw std::runtime_error("Error in mapper call");
}
std::map<std::string, std::vector<std::string>> mapperResponse;
mapperResponseMsg.read(mapperResponse);
if (mapperResponse.empty())
{
log<level::ERR>("Error reading mapper response",
entry("PATH=%s", path.c_str()),
entry("INTERFACE=%s", interface.c_str()));
// TODO openbmc/openbmc#1712 - Handle empty mapper resp. consistently
throw std::runtime_error("Error reading mapper response");
}
return mapperResponse.begin()->first;
}
uint32_t PowerCap::getOccInput(uint32_t pcap, bool pcapEnabled)
{
if (!pcapEnabled)
{
// Pcap disabled, return 0 to indicate disabled
return 0;
}
// If pcap is not disabled then just return the pcap with the derating
// factor applied.
return( (static_cast<uint64_t>(pcap) * PS_DERATING_FACTOR) /100);
}
uint32_t PowerCap::getPcap()
{
auto settingService = getService(PCAP_PATH,PCAP_INTERFACE);
auto method = this->bus.new_method_call(settingService.c_str(),
PCAP_PATH,
"org.freedesktop.DBus.Properties",
"Get");
method.append(PCAP_INTERFACE, POWER_CAP_PROP);
auto reply = this->bus.call(method);
if (reply.is_method_error())
{
log<level::ERR>("Error in getPcap prop");
return 0;
}
sdbusplus::message::variant<uint32_t> pcap;
reply.read(pcap);
return pcap.get<uint32_t>();
}
bool PowerCap::getPcapEnabled()
{
auto settingService = getService(PCAP_PATH,PCAP_INTERFACE);
auto method = this->bus.new_method_call(settingService.c_str(),
PCAP_PATH,
"org.freedesktop.DBus.Properties",
"Get");
method.append(PCAP_INTERFACE, POWER_CAP_ENABLE_PROP);
auto reply = this->bus.call(method);
if (reply.is_method_error())
{
log<level::ERR>("Error in getPcapEnabled prop");
return 0;
}
sdbusplus::message::variant<bool> pcapEnabled;
reply.read(pcapEnabled);
return pcapEnabled.get<bool>();
}
void PowerCap::writeOcc(uint32_t pcapValue)
{
// Create path out to master occ hwmon entry
std::unique_ptr<fs::path> fileName =
std::make_unique<fs::path>(OCC_HWMON_PATH);
*fileName /= OCC_MASTER_NAME;
*fileName /= "/hwmon/";
// Need to get the hwmonXX directory name, there better only be 1 dir
assert(std::distance(fs::directory_iterator(*fileName),
fs::directory_iterator{}) == 1);
// Now set our path to this full path, including this hwmonXX directory
fileName = std::make_unique<fs::path>(*fs::directory_iterator(*fileName));
// Append on the hwmon string where we write the user power cap
*fileName /= "/caps1_user";
auto pcapString {std::to_string(pcapValue)};
log<level::INFO>("Writing pcap value to hwmon",
entry("PCAP_PATH=%s",*fileName),
entry("PCAP_VALUE=%s",pcapString.c_str()));
// Open the hwmon file and write the power cap
std::ofstream file(*fileName, std::ios::out);
file << pcapString;
file.close();
return;
}
void PowerCap::pcapChanged(sdbusplus::message::message& msg)
{
if (!occStatus.occActive())
{
// Nothing to do
return;
}
uint32_t pcap = 0;
bool pcapEnabled = false;
std::string msgSensor;
std::map<std::string, sdbusplus::message::variant<uint32_t, bool>> msgData;
msg.read(msgSensor, msgData);
// Retrieve which property changed via the msg and read the other one
auto valPropMap = msgData.find(POWER_CAP_PROP);
if (valPropMap != msgData.end())
{
pcap = sdbusplus::message::variant_ns::get<uint32_t>(
valPropMap->second);
pcapEnabled = getPcapEnabled();
}
else
{
valPropMap = msgData.find(POWER_CAP_ENABLE_PROP);
if (valPropMap != msgData.end())
{
pcapEnabled = sdbusplus::message::variant_ns::get<bool>(
valPropMap->second);
pcap = getPcap();
}
else
{
log<level::INFO>("Unknown power cap property changed");
return;
}
}
log<level::INFO>("Power Cap Property Change",
entry("PCAP=%u",pcap),
entry("PCAP_ENABLED=%u",pcapEnabled));
// Determine desired action to write to occ
auto occInput = getOccInput(pcap, pcapEnabled);
// Write action to occ
writeOcc(occInput);
return;
}
} // namespace open_power
} // namespace occ
}// namespace powercap
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