1 /** 2 * Copyright © 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 #include "utility.hpp" 17 18 #include "types.hpp" 19 20 #include <fstream> 21 22 namespace phosphor 23 { 24 namespace power 25 { 26 namespace util 27 { 28 29 constexpr auto MAPPER_BUSNAME = "xyz.openbmc_project.ObjectMapper"; 30 constexpr auto MAPPER_PATH = "/xyz/openbmc_project/object_mapper"; 31 constexpr auto MAPPER_INTERFACE = "xyz.openbmc_project.ObjectMapper"; 32 33 using namespace phosphor::logging; 34 using json = nlohmann::json; 35 36 std::string getService(const std::string& path, const std::string& interface, 37 sdbusplus::bus::bus& bus, bool logError) 38 { 39 auto method = bus.new_method_call(MAPPER_BUSNAME, MAPPER_PATH, 40 MAPPER_INTERFACE, "GetObject"); 41 42 method.append(path); 43 method.append(std::vector<std::string>({interface})); 44 45 auto reply = bus.call(method); 46 47 std::map<std::string, std::vector<std::string>> response; 48 reply.read(response); 49 50 if (response.empty()) 51 { 52 if (logError) 53 { 54 log<level::ERR>("Error in mapper response for getting service name", 55 entry("PATH=%s", path.c_str()), 56 entry("INTERFACE=%s", interface.c_str())); 57 } 58 return std::string{}; 59 } 60 61 return response.begin()->first; 62 } 63 64 json loadJSONFromFile(const char* path) 65 { 66 std::ifstream ifs(path); 67 if (!ifs.good()) 68 { 69 log<level::ERR>("Unable to open file", entry("PATH=%s", path)); 70 return nullptr; 71 } 72 auto data = json::parse(ifs, nullptr, false); 73 if (data.is_discarded()) 74 { 75 log<level::ERR>("Failed to parse json", entry("PATH=%s", path)); 76 return nullptr; 77 } 78 return data; 79 } 80 81 phosphor::pmbus::Type getPMBusAccessType(const json& json) 82 { 83 using namespace phosphor::pmbus; 84 Type type; 85 86 auto typeStr = json.at("inventoryPMBusAccessType"); 87 88 if (typeStr == "Hwmon") 89 { 90 type = Type::Hwmon; 91 } 92 else if (typeStr == "DeviceDebug") 93 { 94 type = Type::DeviceDebug; 95 } 96 else if (typeStr == "Debug") 97 { 98 type = Type::Debug; 99 } 100 else if (typeStr == "HwmonDeviceDebug") 101 { 102 type = Type::HwmonDeviceDebug; 103 } 104 else 105 { 106 type = Type::Base; 107 } 108 return type; 109 } 110 111 bool isPoweredOn(sdbusplus::bus::bus& bus, bool defaultState) 112 { 113 int32_t state = defaultState; 114 115 try 116 { 117 // When state = 1, system is powered on 118 auto service = util::getService(POWER_OBJ_PATH, POWER_IFACE, bus); 119 getProperty<int32_t>(POWER_IFACE, "state", POWER_OBJ_PATH, service, bus, 120 state); 121 } 122 catch (std::exception& e) 123 { 124 log<level::INFO>("Failed to get power state."); 125 } 126 return state != 0; 127 } 128 129 std::vector<std::string> getPSUInventoryPaths(sdbusplus::bus::bus& bus) 130 { 131 std::vector<std::string> paths; 132 auto method = bus.new_method_call(MAPPER_BUSNAME, MAPPER_PATH, 133 MAPPER_INTERFACE, "GetSubTreePaths"); 134 method.append(INVENTORY_OBJ_PATH); 135 method.append(0); // Depth 0 to search all 136 method.append(std::vector<std::string>({PSU_INVENTORY_IFACE})); 137 auto reply = bus.call(method); 138 139 reply.read(paths); 140 return paths; 141 } 142 143 } // namespace util 144 } // namespace power 145 } // namespace phosphor 146