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#include <memory>
#include <algorithm>
#include <fcntl.h>
#include <errno.h>
#include <phosphor-logging/log.hpp>
#include <phosphor-logging/elog.hpp>
#include <org/open_power/OCC/PassThrough/error.hpp>
#include "occ_pass_through.hpp"
#include "elog-errors.hpp"
namespace open_power
{
namespace occ
{
PassThrough::PassThrough(
sdbusplus::bus::bus& bus,
const char* path) :
Iface(bus, path),
path(path),
fd(openDevice())
{
// Nothing to do.
}
int PassThrough::openDevice()
{
using namespace phosphor::logging;
using namespace sdbusplus::org::open_power::OCC::PassThrough::Error;
// Device instance number starts from 1.
devicePath.append(std::to_string((this->path.back() - '0') + 1));
int 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::PassThrough::
OpenFailure::CALLOUT_ERRNO(errno),
phosphor::logging::org::open_power::OCC::PassThrough::
OpenFailure::CALLOUT_DEVICE_PATH(devicePath.c_str()));
}
return fd;
}
std::vector<int32_t> PassThrough::send(std::vector<int32_t> command)
{
using namespace phosphor::logging;
using namespace sdbusplus::org::open_power::OCC::PassThrough::Error;
std::vector<int32_t> 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::PassThrough::
WriteFailure::CALLOUT_ERRNO(errno),
phosphor::logging::org::open_power::OCC::PassThrough::
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::PassThrough::
ReadFailure::CALLOUT_ERRNO(errno),
phosphor::logging::org::open_power::OCC::PassThrough::
ReadFailure::CALLOUT_DEVICE_PATH(devicePath.c_str()));
}
}
return response;
}
} // namespace occ
} // namespace open_power
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