1 /** 2 * Copyright (C) 2017 IBM Corporation 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "targeting.hpp" 18 19 #include <endian.h> 20 21 #include <experimental/filesystem> 22 #include <phosphor-logging/elog-errors.hpp> 23 #include <phosphor-logging/elog.hpp> 24 #include <phosphor-logging/log.hpp> 25 #include <regex> 26 #include <xyz/openbmc_project/Common/File/error.hpp> 27 28 namespace openpower 29 { 30 namespace targeting 31 { 32 33 using namespace phosphor::logging; 34 namespace fs = std::experimental::filesystem; 35 namespace file_error = sdbusplus::xyz::openbmc_project::Common::File::Error; 36 37 int Target::getCFAMFD() 38 { 39 if (cfamFD.get() == nullptr) 40 { 41 cfamFD = 42 std::make_unique<openpower::util::FileDescriptor>(getCFAMPath()); 43 } 44 45 return cfamFD->get(); 46 } 47 48 std::unique_ptr<Target>& Targeting::getTarget(size_t pos) 49 { 50 auto search = [pos](const auto& t) { return t->getPos() == pos; }; 51 52 auto target = find_if(targets.begin(), targets.end(), search); 53 if (target == targets.end()) 54 { 55 throw std::runtime_error("Target not found: " + std::to_string(pos)); 56 } 57 else 58 { 59 return *target; 60 } 61 } 62 63 static uint32_t noEndianSwap(uint32_t data) 64 { 65 return data; 66 } 67 68 static uint32_t endianSwap(uint32_t data) 69 { 70 return htobe32(data); 71 } 72 73 Targeting::Targeting(const std::string& fsiMasterDev, 74 const std::string& fsiSlaveDir) : 75 fsiMasterPath(fsiMasterDev), 76 fsiSlaveBasePath(fsiSlaveDir) 77 { 78 swap_endian_t swapper = endianSwap; 79 std::regex exp{"fsi1/slave@([0-9]{2}):00", std::regex::extended}; 80 81 if (!fs::exists(fsiMasterPath)) 82 { 83 std::regex expOld{"hub@00/slave@([0-9]{2}):00", std::regex::extended}; 84 85 // Fall back to old (4.7) path 86 exp = expOld; 87 fsiMasterPath = fsiMasterDevPathOld; 88 fsiSlaveBasePath = fsiSlaveBaseDirOld; 89 90 // And don't swap the endianness of CFAM data 91 swapper = noEndianSwap; 92 } 93 94 // Always create P0, the FSI master. 95 targets.push_back(std::make_unique<Target>(0, fsiMasterPath, swapper)); 96 try 97 { 98 // Find the the remaining P9s dynamically based on which files show up 99 for (auto& file : fs::directory_iterator(fsiSlaveBasePath)) 100 { 101 std::smatch match; 102 std::string path = file.path(); 103 if (std::regex_search(path, match, exp)) 104 { 105 auto pos = atoi(match[1].str().c_str()); 106 if (pos == 0) 107 { 108 log<level::ERR>("Unexpected FSI slave device name found", 109 entry("DEVICE_NAME=%s", path.c_str())); 110 continue; 111 } 112 113 path += "/raw"; 114 115 targets.push_back(std::make_unique<Target>(pos, path, swapper)); 116 } 117 } 118 } 119 catch (fs::filesystem_error& e) 120 { 121 using metadata = xyz::openbmc_project::Common::File::Open; 122 123 elog<file_error::Open>(metadata::ERRNO(e.code().value()), 124 metadata::PATH(e.path1().c_str())); 125 } 126 127 auto sortTargets = [](const std::unique_ptr<Target>& left, 128 const std::unique_ptr<Target>& right) { 129 return left->getPos() < right->getPos(); 130 }; 131 std::sort(targets.begin(), targets.end(), sortTargets); 132 } 133 134 } // namespace targeting 135 } // namespace openpower 136