| /* |
| * Copyright (c) 2017, The Linux Foundation. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * * Neither the name of The Linux Foundation nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "PmcCfg.h" |
| #include "DebugLogger.h" |
| |
| #include <string.h> |
| #include <fstream> |
| #include <errno.h> |
| |
| // ************************************************************************************************* |
| |
| PmcCfg::PmcCfg(const char* szDebugFsPath) |
| { |
| if (!szDebugFsPath) |
| { |
| LOG_ERROR << "No Debug FS path is provided" << std::endl; |
| return; |
| } |
| |
| std::stringstream pathBuilder; |
| pathBuilder << szDebugFsPath << '/' << "pmccfg"; |
| |
| m_PmcCfgFilePath = pathBuilder.str(); |
| |
| LOG_DEBUG << "PMC Configurator Created.\n" |
| << " Debug FS Path: " << szDebugFsPath << '\n' |
| << " pmccfg: " << m_PmcCfgFilePath |
| << std::endl; |
| } |
| |
| // ************************************************************************************************* |
| |
| OperationStatus PmcCfg::AllocateDmaDescriptors(size_t descSize, size_t descNum) |
| { |
| LOG_DEBUG << "Allocating PMC DMA Range. Descriptor Size: " |
| << descSize << " Number of descriptors: " << descNum << std::endl; |
| |
| // TODO - Verify parameters for a valid range |
| |
| std::stringstream cmdBuilder; |
| cmdBuilder << "alloc " << descNum << " " << descSize; |
| |
| OperationStatus st = WritePmcCommand(cmdBuilder.str().c_str()); |
| LOG_DEBUG << "Writing PMC command status: " << st << std::endl; |
| |
| if (!st.IsSuccess()) |
| { |
| LOG_ERROR << "Failure writing PMC command: " << st << std::endl; |
| return st; |
| } |
| |
| return GetLastOperationStatus(); |
| } |
| |
| // ************************************************************************************************* |
| |
| OperationStatus PmcCfg::FreeDmaDescriptors() |
| { |
| LOG_DEBUG << "De-Allocating PMC DMA Range" << std::endl; |
| |
| OperationStatus st = WritePmcCommand("free"); |
| LOG_DEBUG << "Querying driver for the last PMC command status: " << st << std::endl; |
| |
| if (!st.IsSuccess()) |
| { |
| LOG_ERROR << "Failure querying for the last PMC command status: " << st << std::endl; |
| return st; |
| } |
| |
| return GetLastOperationStatus(); |
| } |
| |
| // ************************************************************************************************* |
| |
| OperationStatus PmcCfg::WritePmcCommand(const char* szPmcCmd) |
| { |
| LOG_DEBUG << "Writing PMC command to pmccfg: " << szPmcCmd << std::endl; |
| |
| if(m_PmcCfgFilePath.empty()) |
| { |
| return OperationStatus(false, "Cannot allocate PMC memory - No pmccfg file is detected"); |
| } |
| |
| std::ofstream debugFSFile; |
| debugFSFile.open(m_PmcCfgFilePath); |
| |
| if (!debugFSFile.is_open()) |
| { |
| std::stringstream msgBuilder; |
| msgBuilder << "Cannot open " << m_PmcCfgFilePath << ": " << strerror(errno); |
| return OperationStatus(false, msgBuilder.str().c_str()); |
| } |
| |
| debugFSFile << szPmcCmd; |
| |
| // Verify the stream state after writing |
| if (!debugFSFile) |
| { |
| std::stringstream msgBuilder; |
| msgBuilder << "Cannot write to " << m_PmcCfgFilePath << ": " << strerror(errno); |
| return OperationStatus(false, msgBuilder.str().c_str()); |
| } |
| |
| // Unnecessary as closed on destruction, just for clarity. |
| debugFSFile.close(); |
| |
| return OperationStatus(true); |
| } |
| |
| // ************************************************************************************************* |
| |
| OperationStatus PmcCfg::GetLastOperationStatus() |
| { |
| LOG_DEBUG << "Querying pmccfg for the last operation status" << std::endl; |
| |
| if(m_PmcCfgFilePath.empty()) |
| { |
| return OperationStatus(false, "Cannot query for last PMC operation status - No pmccfg file is detected"); |
| } |
| |
| std::ifstream debugFSFile; |
| debugFSFile.open(m_PmcCfgFilePath); |
| |
| if(!debugFSFile.is_open()) |
| { |
| std::stringstream msgBuilder; |
| msgBuilder << "Cannot open " << m_PmcCfgFilePath << ": " << strerror(errno); |
| return OperationStatus(false, msgBuilder.str().c_str()); |
| } |
| |
| // Query pmcconfig for the operation status |
| // The file first line is expected to be formatted as follows: |
| // Last command status: X |
| std::string firstLineToken1; |
| std::string firstLineToken2; |
| std::string firstLineToken3; |
| int lastOpStatus = -1; |
| debugFSFile >> firstLineToken1 >> firstLineToken2 >> firstLineToken3 >> lastOpStatus; |
| |
| if (!debugFSFile) |
| { |
| // The failbit will also be set if the first line is not formatted as expected. |
| // In this case errno is zero and error message is 'Success'. |
| std::stringstream msgBuilder; |
| msgBuilder << "Cannot read from " << m_PmcCfgFilePath << ": " << strerror(errno); |
| return OperationStatus(false, msgBuilder.str().c_str()); |
| } |
| |
| LOG_DEBUG << "First line of pmccfg: " |
| << firstLineToken1 << ' ' |
| << firstLineToken2 << ' ' |
| << firstLineToken3 << ' ' |
| << lastOpStatus |
| << std::endl; |
| |
| if (0 != lastOpStatus) |
| { |
| // TODO: Parse erorr code to a meaningfull message |
| std::stringstream msgBuilder; |
| msgBuilder << "pmccfg operation failure reported by the driver: " << lastOpStatus; |
| return OperationStatus(false, msgBuilder.str().c_str()); |
| } |
| |
| return OperationStatus(true); |
| } |
| |
| // ************************************************************************************************* |
| |
| OperationStatus PmcCfg::FlashPmcData() |
| { |
| // TBD |
| OperationStatus st(false, "Not Implemented"); |
| return st; |
| } |
| |
| // ************************************************************************************************* |