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
getMbFruDevice(void)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