blob: 9c585d08e4f7e69f725103a58f220894062cb0bc [file] [log] [blame]
#include "config.h"
#include "occ_pass_through.hpp"
#include "elog-errors.hpp"
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <algorithm>
#include <memory>
#include <org/open_power/OCC/Device/error.hpp>
#include <phosphor-logging/elog.hpp>
#include <phosphor-logging/log.hpp>
#include <string>
namespace open_power
{
namespace occ
{
PassThrough::PassThrough(sdbusplus::bus::bus& bus, const char* path) :
Iface(bus, path), path(path),
devicePath(OCC_DEV_PATH + std::to_string((this->path.back() - '0') + 1)),
activeStatusSignal(
bus, sdbusRule::propertiesChanged(path, "org.open_power.OCC.Status"),
std::bind(std::mem_fn(&PassThrough::activeStatusEvent), this,
std::placeholders::_1))
{
// Nothing to do.
}
void PassThrough::openDevice()
{
using namespace phosphor::logging;
using namespace sdbusplus::org::open_power::OCC::Device::Error;
if (!occActive)
{
log<level::INFO>("OCC is inactive; cannot perform pass-through");
return;
}
fd = open(devicePath.c_str(), O_RDWR | O_NONBLOCK);
if (fd < 0)
{
// This would log and terminate since its not handled.
elog<OpenFailure>(
phosphor::logging::org::open_power::OCC::Device::OpenFailure::
CALLOUT_ERRNO(errno),
phosphor::logging::org::open_power::OCC::Device::OpenFailure::
CALLOUT_DEVICE_PATH(devicePath.c_str()));
}
return;
}
void PassThrough::closeDevice()
{
if (fd >= 0)
{
close(fd);
fd = -1;
}
}
std::vector<int32_t> PassThrough::send(std::vector<int32_t> command)
{
using namespace phosphor::logging;
using namespace sdbusplus::org::open_power::OCC::Device::Error;
std::vector<int32_t> response{};
openDevice();
if (fd < 0)
{
// OCC is inactive; empty response
return response;
}
// OCC only understands [bytes] so need array of bytes. Doing this
// because rest-server currently treats all int* as 32 bit integer.
std::vector<uint8_t> cmdInBytes;
cmdInBytes.resize(command.size());
// Populate uint8_t version of vector.
std::transform(command.begin(), command.end(), cmdInBytes.begin(),
[](decltype(cmdInBytes)::value_type x) { return x; });
ssize_t size = cmdInBytes.size() * sizeof(decltype(cmdInBytes)::value_type);
auto rc = write(fd, cmdInBytes.data(), size);
if (rc < 0 || (rc != size))
{
// This would log and terminate since its not handled.
elog<WriteFailure>(
phosphor::logging::org::open_power::OCC::Device::WriteFailure::
CALLOUT_ERRNO(errno),
phosphor::logging::org::open_power::OCC::Device::WriteFailure::
CALLOUT_DEVICE_PATH(devicePath.c_str()));
}
// Now read the response. This would be the content of occ-sram
while (1)
{
uint8_t data{};
auto len = read(fd, &data, sizeof(data));
if (len > 0)
{
response.emplace_back(data);
}
else if (len < 0 && errno == EAGAIN)
{
// We may have data coming still.
// This driver does not need a sleep for a retry.
continue;
}
else if (len == 0)
{
// We have read all that we can.
break;
}
else
{
// This would log and terminate since its not handled.
elog<ReadFailure>(
phosphor::logging::org::open_power::OCC::Device::ReadFailure::
CALLOUT_ERRNO(errno),
phosphor::logging::org::open_power::OCC::Device::ReadFailure::
CALLOUT_DEVICE_PATH(devicePath.c_str()));
}
}
closeDevice();
return response;
}
// Called at OCC Status change signal
void PassThrough::activeStatusEvent(sdbusplus::message::message& msg)
{
std::string statusInterface;
std::map<std::string, sdbusplus::message::variant<bool>> msgData;
msg.read(statusInterface, msgData);
auto propertyMap = msgData.find("OccActive");
if (propertyMap != msgData.end())
{
// Extract the OccActive property
if (std::get<bool>(propertyMap->second))
{
occActive = true;
}
else
{
occActive = false;
this->closeDevice();
}
}
return;
}
} // namespace occ
} // namespace open_power