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/*
* Copyright 2018 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 "lpc_handler.hpp"
#include <cstdint>
#include <cstring>
#include <vector>
namespace ipmi_flash
{
bool LpcDataHandler::open()
{
/* For the ASPEED LPC CTRL driver, the ioctl is required to set up the
* window, with information from writeMeta() below.
*/
return true;
}
bool LpcDataHandler::close()
{
mapper->close();
return setInitializedAndReturn(false);
}
std::vector<std::uint8_t> LpcDataHandler::copyFrom(std::uint32_t length)
{
/* TODO: implement this -- in an earlier and different version of this that
* didn't use BLOBs, the region was memory-mapped and the writes to the data
* were just done directly from the memory-mapped region instead of a
* copyFrom() first call. The idea with this change is that we may not be
* able to get a memory-mapped handle from the driver from which to
* automatically read data, but rather must perform some ioctl or other
* access to get the data from the driver.
*/
if (!initialized)
{
/* TODO: Consider designing some exceptions we can catch for when there
* is an error.
*/
return {};
}
std::vector<std::uint8_t> results(length);
std::memcpy(results.data(), memory.mapped + mappingResult.windowOffset,
length);
return results;
}
bool LpcDataHandler::writeMeta(const std::vector<std::uint8_t>& configuration)
{
struct LpcRegion lpcRegion;
if (configuration.size() != sizeof(lpcRegion))
{
return false;
}
std::memcpy(&lpcRegion, configuration.data(), configuration.size());
/* TODO: LpcRegion sanity checking. */
mappingResult = mapper->mapWindow(lpcRegion.address, lpcRegion.length);
if (mappingResult.response != 0)
{
std::fprintf(stderr, "mappingResult.response %u\n",
mappingResult.response);
/* Failed to map region. */
return false;
}
return setInitializedAndReturn(true);
}
std::vector<std::uint8_t> LpcDataHandler::readMeta()
{
/* Return the MemoryResult structure packed. */
std::vector<std::uint8_t> output(
sizeof(std::uint8_t) + sizeof(std::uint32_t) + sizeof(std::uint32_t));
int index = 0;
std::memcpy(&output[index], &mappingResult.response,
sizeof(mappingResult.response));
index += sizeof(mappingResult.response);
std::memcpy(&output[index], &mappingResult.windowOffset,
sizeof(mappingResult.windowOffset));
index += sizeof(mappingResult.windowOffset);
std::memcpy(&output[index], &mappingResult.windowSize,
sizeof(mappingResult.windowSize));
return output;
}
} // namespace ipmi_flash
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