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) 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 log<level::ERR>("Error in mapper response for getting service name", 53 entry("PATH=%s", path.c_str()), 54 entry("INTERFACE=%s", interface.c_str())); 55 return std::string{}; 56 } 57 58 return response.begin()->first; 59 } 60 61 json loadJSONFromFile(const char* path) 62 { 63 std::ifstream ifs(path); 64 if (!ifs.good()) 65 { 66 log<level::ERR>("Unable to open file", entry("PATH=%s", path)); 67 return nullptr; 68 } 69 auto data = json::parse(ifs, nullptr, false); 70 if (data.is_discarded()) 71 { 72 log<level::ERR>("Failed to parse json", entry("PATH=%s", path)); 73 return nullptr; 74 } 75 return data; 76 } 77 78 phosphor::pmbus::Type getPMBusAccessType(const json& json) 79 { 80 using namespace phosphor::pmbus; 81 Type type; 82 83 auto typeStr = json.at("inventoryPMBusAccessType"); 84 85 if (typeStr == "Hwmon") 86 { 87 type = Type::Hwmon; 88 } 89 else if (typeStr == "DeviceDebug") 90 { 91 type = Type::DeviceDebug; 92 } 93 else if (typeStr == "Debug") 94 { 95 type = Type::Debug; 96 } 97 else if (typeStr == "HwmonDeviceDebug") 98 { 99 type = Type::HwmonDeviceDebug; 100 } 101 else 102 { 103 type = Type::Base; 104 } 105 return type; 106 } 107 108 bool isPoweredOn(sdbusplus::bus::bus& bus, bool defaultState) 109 { 110 int32_t state = defaultState; 111 112 try 113 { 114 // When state = 1, system is powered on 115 auto service = util::getService(POWER_OBJ_PATH, POWER_IFACE, bus); 116 getProperty<int32_t>(POWER_IFACE, "state", POWER_OBJ_PATH, service, bus, 117 state); 118 } 119 catch (std::exception& e) 120 { 121 log<level::INFO>("Failed to get power state."); 122 } 123 return state != 0; 124 } 125 126 std::vector<std::string> getPSUInventoryPaths(sdbusplus::bus::bus& bus) 127 { 128 std::vector<std::string> paths; 129 auto method = bus.new_method_call(MAPPER_BUSNAME, MAPPER_PATH, 130 MAPPER_INTERFACE, "GetSubTreePaths"); 131 method.append(INVENTORY_OBJ_PATH); 132 method.append(0); // Depth 0 to search all 133 method.append(std::vector<std::string>({PSU_INVENTORY_IFACE})); 134 auto reply = bus.call(method); 135 136 reply.read(paths); 137 return paths; 138 } 139 140 } // namespace util 141 } // namespace power 142 } // namespace phosphor 143