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/**
* Copyright (C) 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 "targeting.hpp"
#include <endian.h>
#include <experimental/filesystem>
#include <phosphor-logging/elog-errors.hpp>
#include <phosphor-logging/elog.hpp>
#include <phosphor-logging/log.hpp>
#include <regex>
#include <xyz/openbmc_project/Common/File/error.hpp>
namespace openpower
{
namespace targeting
{
using namespace phosphor::logging;
namespace fs = std::experimental::filesystem;
namespace file_error = sdbusplus::xyz::openbmc_project::Common::File::Error;
int Target::getCFAMFD()
{
if (cfamFD.get() == nullptr)
{
cfamFD =
std::make_unique<openpower::util::FileDescriptor>(getCFAMPath());
}
return cfamFD->get();
}
std::unique_ptr<Target>& Targeting::getTarget(size_t pos)
{
auto search = [pos](const auto& t) { return t->getPos() == pos; };
auto target = find_if(targets.begin(), targets.end(), search);
if (target == targets.end())
{
throw std::runtime_error("Target not found: " + std::to_string(pos));
}
else
{
return *target;
}
}
static uint32_t noEndianSwap(uint32_t data)
{
return data;
}
static uint32_t endianSwap(uint32_t data)
{
return htobe32(data);
}
Targeting::Targeting(const std::string& fsiMasterDev,
const std::string& fsiSlaveDir) :
fsiMasterPath(fsiMasterDev),
fsiSlaveBasePath(fsiSlaveDir)
{
swap_endian_t swapper = endianSwap;
std::regex exp{"fsi1/slave@([0-9]{2}):00", std::regex::extended};
if (!fs::exists(fsiMasterPath))
{
std::regex expOld{"hub@00/slave@([0-9]{2}):00", std::regex::extended};
// Fall back to old (4.7) path
exp = expOld;
fsiMasterPath = fsiMasterDevPathOld;
fsiSlaveBasePath = fsiSlaveBaseDirOld;
// And don't swap the endianness of CFAM data
swapper = noEndianSwap;
}
// Always create P0, the FSI master.
targets.push_back(std::make_unique<Target>(0, fsiMasterPath, swapper));
try
{
// Find the the remaining P9s dynamically based on which files show up
for (auto& file : fs::directory_iterator(fsiSlaveBasePath))
{
std::smatch match;
std::string path = file.path();
if (std::regex_search(path, match, exp))
{
auto pos = atoi(match[1].str().c_str());
if (pos == 0)
{
log<level::ERR>("Unexpected FSI slave device name found",
entry("DEVICE_NAME=%s", path.c_str()));
continue;
}
path += "/raw";
targets.push_back(std::make_unique<Target>(pos, path, swapper));
}
}
}
catch (fs::filesystem_error& e)
{
using metadata = xyz::openbmc_project::Common::File::Open;
elog<file_error::Open>(metadata::ERRNO(e.code().value()),
metadata::PATH(e.path1().c_str()));
}
auto sortTargets = [](const std::unique_ptr<Target>& left,
const std::unique_ptr<Target>& right) {
return left->getPos() < right->getPos();
};
std::sort(targets.begin(), targets.end(), sortTargets);
}
} // namespace targeting
} // namespace openpower
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