1 /* 2 * Copyright (c) 2023-present Facebook. 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 <commandutils.hpp> 18 #include <ipmid/utils.hpp> 19 #include <phosphor-logging/log.hpp> 20 21 std::optional<std::pair<uint8_t, uint8_t>> getMbFruDevice(void) 22 { 23 static std::optional<std::pair<uint8_t, uint8_t>> device = std::nullopt; 24 25 if (device) 26 { 27 return device; 28 } 29 30 sdbusplus::bus_t dbus(ipmid_get_sd_bus_connection()); 31 auto mapperCall = dbus.new_method_call("xyz.openbmc_project.ObjectMapper", 32 "/xyz/openbmc_project/object_mapper", 33 "xyz.openbmc_project.ObjectMapper", 34 "GetSubTreePaths"); 35 static constexpr int32_t depth = 0; 36 static constexpr auto iface = "xyz.openbmc_project.Configuration.EEPROM"; 37 static constexpr auto entityManager = "xyz.openbmc_project.EntityManager"; 38 static constexpr std::array<const char*, 1> interface = {iface}; 39 mapperCall.append("/xyz/openbmc_project/inventory/", depth, interface); 40 41 std::vector<std::string> paths; 42 try 43 { 44 auto resp = dbus.call(mapperCall); 45 resp.read(paths); 46 } 47 catch (const sdbusplus::exception_t& e) 48 { 49 phosphor::logging::log<phosphor::logging::level::ERR>(e.what()); 50 return std::nullopt; 51 } 52 53 const std::string suffix = "/MB_FRU"; 54 for (const auto& path : paths) 55 { 56 if (path.ends_with(suffix)) 57 { 58 uint8_t fruBus = std::get<uint64_t>( 59 ipmi::getDbusProperty(dbus, entityManager, path, iface, "Bus")); 60 uint8_t fruAddr = std::get<uint64_t>(ipmi::getDbusProperty( 61 dbus, entityManager, path, iface, "Address")); 62 device = std::make_pair(fruBus, fruAddr); 63 break; 64 } 65 } 66 67 return device; 68 } 69