Update first patch for Cold Redundancy

Update first patch for PowerSupply Cold Redundancy feature.
The first patch will get PSU information from entity manager and
base on the information, create PSU class for Cold Redundancy.

Tested:
With later Cold Redundancy patch, basic function, keep alive and
PSU status all can work correctly.

Change-Id: Ib2279043c0cbfade9c02f4107ae2137af17ba942
Signed-off-by: Cheng C Yang <cheng.c.yang@intel.com>

10 files changed, 843 insertions, 0 deletions

diff --git a/psu-manager/.clang-format b/psu-manager/.clang-format
new file mode 100644
index 0000000..ea71ad6
--- /dev/null
+++ b/psu-manager/.clang-format
@@ -0,0 +1,99 @@
+---
+Language:        Cpp
+# BasedOnStyle:  LLVM
+AccessModifierOffset: -2
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: false
+AlignConsecutiveDeclarations: false
+AlignEscapedNewlinesLeft: false
+AlignOperands:   true
+AlignTrailingComments: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortBlocksOnASingleLine: false
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: None
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: true
+BinPackArguments: true
+BinPackParameters: true
+BraceWrapping:
+  AfterClass:      true
+  AfterControlStatement: true
+  AfterEnum:       true
+  AfterFunction:   true
+  AfterNamespace:  true
+  AfterObjCDeclaration: true
+  AfterStruct:     true
+  AfterUnion:      true
+  BeforeCatch:     true
+  BeforeElse:      true
+  IndentBraces:    false
+BreakBeforeBinaryOperators: None
+BreakBeforeBraces: Custom
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializers: AfterColon
+ColumnLimit:     80
+CommentPragmas:  '^ IWYU pragma:'
+ConstructorInitializerAllOnOneLineOrOnePerLine: false
+ConstructorInitializerIndentWidth: 4
+ContinuationIndentWidth: 4
+Cpp11BracedListStyle: true
+DerivePointerAlignment: false
+PointerAlignment: Left
+DisableFormat:   false
+ExperimentalAutoDetectBinPacking: false
+FixNamespaceComments: true
+ForEachMacros:   [ foreach, Q_FOREACH, BOOST_FOREACH ]
+IncludeBlocks: Regroup
+IncludeCategories:
+  - Regex:           '^[<"](gtest|gmock)'
+    Priority:        5
+  - Regex:           '^"config.h"'
+    Priority:        -1
+  - Regex:           '^".*\.hpp"'
+    Priority:        1
+  - Regex:           '^<.*\.h>'
+    Priority:        2
+  - Regex:           '^<.*'
+    Priority:        3
+  - Regex:           '.*'
+    Priority:        4
+IndentCaseLabels: true
+IndentWidth:     4
+IndentWrappedFunctionNames: true
+KeepEmptyLinesAtTheStartOfBlocks: true
+MacroBlockBegin: ''
+MacroBlockEnd:   ''
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+ObjCBlockIndentWidth: 2
+ObjCSpaceAfterProperty: false
+ObjCSpaceBeforeProtocolList: true
+PenaltyBreakBeforeFirstCallParameter: 19
+PenaltyBreakComment: 300
+PenaltyBreakFirstLessLess: 120
+PenaltyBreakString: 1000
+PenaltyExcessCharacter: 1000000
+PenaltyReturnTypeOnItsOwnLine: 60
+ReflowComments:  true
+SortIncludes:    true
+SortUsingDeclarations: true
+SpaceAfterCStyleCast: false
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeParens: ControlStatements
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 1
+SpacesInAngles:  false
+SpacesInContainerLiterals: true
+SpacesInCStyleCastParentheses: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+Standard:        Cpp11
+TabWidth:        4
+UseTab:          Never
+...
+
diff --git a/psu-manager/CMakeLists.txt b/psu-manager/CMakeLists.txt
new file mode 100644
index 0000000..d29d98a
--- /dev/null
+++ b/psu-manager/CMakeLists.txt
@@ -0,0 +1,54 @@
+cmake_minimum_required (VERSION 2.8.10 FATAL_ERROR)
+set (BUILD_SHARED_LIBRARIES OFF)
+include (ExternalProject)
+set (CMAKE_CXX_STANDARD 17)
+set (CMAKE_CXX_STANDARD_REQUIRED ON)
+set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -lstdc++fs -Werror")
+
+set (CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake ${CMAKE_MODULE_PATH})
+
+include_directories (
+    ${CMAKE_CURRENT_SOURCE_DIR}/include/phosphor-dbus-interfaces
+)
+
+project (psumanager CXX)
+
+set (PSU_CR_SRC_FILES src/utility.cpp src/coldRedundancy.cpp)
+
+set (EXTERNAL_PACKAGES Boost sdbusplus-project nlohmann-json)
+set (CR_LINK_LIBS -lsystemd stdc++fs sdbusplus)
+
+add_definitions (-DBOOST_ERROR_CODE_HEADER_ONLY)
+add_definitions (-DBOOST_SYSTEM_NO_DEPRECATED)
+add_definitions (-DBOOST_ALL_NO_LIB)
+add_definitions (-DBOOST_NO_RTTI)
+add_definitions (-DBOOST_NO_TYPEID)
+add_definitions (-DBOOST_ASIO_DISABLE_THREADS)
+
+link_directories (${EXTERNAL_INSTALL_LOCATION}/lib)
+
+include_directories (${CMAKE_CURRENT_SOURCE_DIR}/include)
+
+include_directories (${SDBUSPLUSPLUS_INCLUDE_DIRS})
+link_directories (${SDBUSPLUSPLUS_LIBRARY_DIRS})
+
+include_directories (${DBUSINTERFACE_INCLUDE_DIRS})
+link_directories (${DBUSINTERFACE_LIBRARY_DIRS})
+
+add_executable (psuredundancy ${PSU_CR_SRC_FILES} src/redundancyMain.cpp)
+add_dependencies (psuredundancy sdbusplus-project)
+target_link_libraries (psuredundancy ${CR_LINK_LIBS})
+target_link_libraries (psuredundancy i2c)
+target_link_libraries (psuredundancy phosphor_logging)
+target_link_libraries (psuredundancy phosphor_dbus)
+
+include_directories (${LOGGING_INCLUDE_DIRS})
+link_directories (${LOGGING_LIBRARY_DIRS})
+
+set (SERVICE_FILE_SRC_DIR ${PROJECT_SOURCE_DIR}/service_files)
+set (SERVICE_FILE_INSTALL_DIR /lib/systemd/system/)
+
+install (TARGETS psuredundancy DESTINATION bin)
+install (FILES
+             ${SERVICE_FILE_SRC_DIR}/xyz.openbmc_project.coldredundancy.service
+             DESTINATION ${SERVICE_FILE_INSTALL_DIR})
diff --git a/psu-manager/LICENSE b/psu-manager/LICENSE
new file mode 100644
index 0000000..8dada3e
--- /dev/null
+++ b/psu-manager/LICENSE
@@ -0,0 +1,201 @@
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diff --git a/psu-manager/cmake-format.json b/psu-manager/cmake-format.json
new file mode 100644
index 0000000..4a68fb7
--- /dev/null
+++ b/psu-manager/cmake-format.json
@@ -0,0 +1,13 @@
+{
+  "enum_char": ".",
+  "line_ending": "unix",
+  "bullet_char": "*",
+  "max_subargs_per_line": 99,
+  "command_case": "lower",
+  "tab_size": 4,
+  "line_width": 80,
+  "separate_fn_name_with_space": true,
+  "dangle_parens": true,
+  "separate_ctrl_name_with_space": true
+}
+
diff --git a/psu-manager/include/coldRedundancy.hpp b/psu-manager/include/coldRedundancy.hpp
new file mode 100644
index 0000000..9eba4e9
--- /dev/null
+++ b/psu-manager/include/coldRedundancy.hpp
@@ -0,0 +1,71 @@
+/*
+// Copyright (c) 2019 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#include <sdbusplus/asio/object_server.hpp>
+#include <utility.hpp>
+#include <xyz/openbmc_project/Control/PowerSupplyRedundancy/server.hpp>
+
+const constexpr char* psuInterface =
+    "/xyz/openbmc_project/inventory/system/powersupply/";
+const constexpr int secondsInOneDay = 86400;
+const constexpr uint8_t bmcSpecific = 0;
+
+class ColdRedundancy
+    : sdbusplus::xyz::openbmc_project::Control::server::PowerSupplyRedundancy
+{
+  public:
+    ColdRedundancy(
+        boost::asio::io_service& io,
+        sdbusplus::asio::object_server& objectServer,
+        std::shared_ptr<sdbusplus::asio::connection>& dbusConnection);
+    ~ColdRedundancy() = default;
+
+    void
+        createPSU(boost::asio::io_service& io,
+                  sdbusplus::asio::object_server& objectServer,
+                  std::shared_ptr<sdbusplus::asio::connection>& dbusConnection);
+
+  private:
+    bool crSupported = true;
+    bool crEnabled = true;
+    bool rotationEnabled = true;
+    uint8_t rotationAlgo = 0;
+    uint8_t psOrder;
+    uint8_t numberOfPSU = 0;
+    uint32_t rotationPeriod = 7 * secondsInOneDay;
+
+    std::shared_ptr<sdbusplus::asio::connection>& systemBus;
+
+    std::vector<std::unique_ptr<sdbusplus::bus::match::match>> matches;
+    boost::asio::deadline_timer timerRotation;
+    boost::asio::deadline_timer timerCheck;
+};
+
+constexpr const uint8_t pmbusCmdCRSupport = 0xd0;
+
+class PowerSupply
+{
+  public:
+    PowerSupply(
+        std::string name, uint8_t bus, uint8_t address,
+        const std::shared_ptr<sdbusplus::asio::connection>& dbusConnection);
+    ~PowerSupply();
+    std::string name;
+    uint8_t order = 0;
+    uint8_t bus;
+    uint8_t address;
+    PSUState state = PSUState::normal;
+};
diff --git a/psu-manager/include/utility.hpp b/psu-manager/include/utility.hpp
new file mode 100644
index 0000000..0b4d834
--- /dev/null
+++ b/psu-manager/include/utility.hpp
@@ -0,0 +1,56 @@
+/*
+// Copyright (c) 2019 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#pragma once
+#include <boost/container/flat_map.hpp>
+#include <chrono>
+#include <cstdint>
+#include <iostream>
+#include <sdbusplus/asio/connection.hpp>
+
+const constexpr char* entityManagerName = "xyz.openbmc_project.EntityManager";
+static const constexpr std::array<const char*, 1> psuEventInterface = {
+    "xyz.openbmc_project.State.Decorator.OperationalStatus"};
+
+using BasicVariantType =
+    std::variant<std::vector<std::string>, std::string, int64_t, uint64_t,
+                 double, int32_t, uint32_t, int16_t, uint16_t, uint8_t, bool>;
+
+// using PropertyMapType =
+//    std::vector<std::pair<std::string, BasicVariantType>>;
+using PropertyMapType =
+    boost::container::flat_map<std::string, BasicVariantType>;
+
+using GetSubTreeType = std::vector<
+    std::pair<std::string,
+              std::vector<std::pair<std::string, std::vector<std::string>>>>>;
+
+constexpr std::chrono::microseconds dbusTimeout(5000);
+
+using Value = sdbusplus::message::variant<bool, uint8_t, int16_t, uint16_t,
+                                          int32_t, uint32_t, int64_t, uint64_t,
+                                          double, std::string>;
+
+enum class PSUState
+{
+    normal,
+    acLost
+};
+
+void getPSUEvent(
+    const std::array<const char*, 1>& type,
+    const std::shared_ptr<sdbusplus::asio::connection>& dbusConnection,
+    const std::string& psuName, PSUState& state);
diff --git a/psu-manager/service_files/xyz.openbmc_project.coldredundancy.service b/psu-manager/service_files/xyz.openbmc_project.coldredundancy.service
new file mode 100644
index 0000000..f6adf16
--- /dev/null
+++ b/psu-manager/service_files/xyz.openbmc_project.coldredundancy.service
@@ -0,0 +1,12 @@
+[Unit]
+Description=Intel BMC PSU Cold Redundancy
+
+[Service]
+Restart=always
+RestartSec=5
+StartLimitBurst=10
+ExecStart=/usr/bin/env psuredundancy
+SyslogIdentifier=psuredundancy
+
+[Install]
+WantedBy=multi-user.target
diff --git a/psu-manager/src/coldRedundancy.cpp b/psu-manager/src/coldRedundancy.cpp
new file mode 100644
index 0000000..308d17a
--- /dev/null
+++ b/psu-manager/src/coldRedundancy.cpp
@@ -0,0 +1,204 @@
+/*
+// Copyright (c) 2019 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#include <array>
+#include <boost/algorithm/string/predicate.hpp>
+#include <boost/algorithm/string/replace.hpp>
+#include <boost/container/flat_set.hpp>
+#include <coldRedundancy.hpp>
+#include <filesystem>
+#include <fstream>
+#include <iostream>
+#include <phosphor-logging/elog-errors.hpp>
+#include <regex>
+#include <sdbusplus/asio/connection.hpp>
+#include <sdbusplus/asio/object_server.hpp>
+#include <sdbusplus/asio/sd_event.hpp>
+#include <utility.hpp>
+
+static constexpr const bool debug = false;
+
+static constexpr const std::array<const char*, 1> psuInterfaceTypes = {
+    "xyz.openbmc_project.Configuration.pmbus"};
+static const constexpr char* inventoryPath = "/xyz/openbmc_project/inventory";
+static const constexpr char* eventPath = "/xyz/openbmc_project/State/Decorator";
+static const constexpr char* coldRedundancyPath =
+    "/xyz/openbmc_project/control/power_supply_redundancy";
+
+static std::vector<std::unique_ptr<PowerSupply>> powerSupplies;
+
+ColdRedundancy::ColdRedundancy(
+    boost::asio::io_service& io, sdbusplus::asio::object_server& objectServer,
+    std::shared_ptr<sdbusplus::asio::connection>& systemBus) :
+    sdbusplus::xyz::openbmc_project::Control::server::PowerSupplyRedundancy(
+        *systemBus, coldRedundancyPath),
+    timerRotation(io), timerCheck(io), systemBus(systemBus)
+{
+    io.post([this, &io, &objectServer, &systemBus]() {
+        createPSU(io, objectServer, systemBus);
+    });
+    std::function<void(sdbusplus::message::message&)> eventHandler =
+        [this, &io, &objectServer,
+         &systemBus](sdbusplus::message::message& message) {
+            if (message.is_method_error())
+            {
+                std::cerr << "callback method error\n";
+                return;
+            }
+            boost::asio::deadline_timer filterTimer(io);
+            filterTimer.expires_from_now(boost::posix_time::seconds(1));
+            filterTimer.async_wait([this, &io, &objectServer, &systemBus](
+                                       const boost::system::error_code& ec) {
+                if (ec == boost::asio::error::operation_aborted)
+                {
+                    return;
+                }
+                else if (ec)
+                {
+                    std::cerr << "timer error\n";
+                }
+                createPSU(io, objectServer, systemBus);
+            });
+        };
+    for (const char* type : psuInterfaceTypes)
+    {
+        auto match = std::make_unique<sdbusplus::bus::match::match>(
+            static_cast<sdbusplus::bus::bus&>(*systemBus),
+            "type='signal',member='PropertiesChanged',path_namespace='" +
+                std::string(inventoryPath) + "',arg0namespace='" + type + "'",
+            eventHandler);
+        matches.emplace_back(std::move(match));
+    }
+
+    io.run();
+}
+
+// Check PSU information from entity-manager D-Bus interface and use the bus
+// address to create PSU Class for cold redundancy.
+void ColdRedundancy::createPSU(
+    boost::asio::io_service& io, sdbusplus::asio::object_server& objectServer,
+    std::shared_ptr<sdbusplus::asio::connection>& conn)
+{
+    std::vector<PropertyMapType> sensorConfigs;
+    numberOfPSU = 0;
+    powerSupplies.clear();
+    sensorConfigs.clear();
+
+    // call mapper to get matched obj paths
+    conn->async_method_call(
+        [this, &conn, &sensorConfigs](const boost::system::error_code ec,
+                                      GetSubTreeType subtree) {
+            if (ec)
+            {
+                std::cerr << "Exception happened when communicating to "
+                             "ObjectMapper\n";
+                return;
+            }
+            if (debug)
+            {
+                std::cerr << "get valid subtree\n";
+            }
+            for (const auto& object : subtree)
+            {
+                std::string pathName = object.first;
+                for (const auto& serviceIface : object.second)
+                {
+                    std::string serviceName = serviceIface.first;
+                    for (const auto& interface : serviceIface.second)
+                    {
+                        // only get property of matched interface
+                        bool isIfaceMatched = false;
+                        for (const auto& type : psuInterfaceTypes)
+                        {
+                            if (type == interface)
+                            {
+                                isIfaceMatched = true;
+                                break;
+                            }
+                        }
+                        if (!isIfaceMatched)
+                            continue;
+
+                        conn->async_method_call(
+                            [this, &conn,
+                             &sensorConfigs](const boost::system::error_code ec,
+                                             PropertyMapType propMap) {
+                                if (ec)
+                                {
+                                    std::cerr
+                                        << "Exception happened when get all "
+                                           "properties\n";
+                                    return;
+                                }
+                                if (debug)
+                                {
+                                    std::cerr << "get valid propMap\n";
+                                }
+                                // sensorConfigs.emplace_back(propMap);
+                                auto configBus =
+                                    std::get_if<uint64_t>(&propMap["Bus"]);
+                                auto configAddress =
+                                    std::get_if<uint64_t>(&propMap["Address"]);
+                                auto configName =
+                                    std::get_if<std::string>(&propMap["Name"]);
+
+                                if (configBus == nullptr ||
+                                    configAddress == nullptr ||
+                                    configName == nullptr)
+                                {
+                                    std::cerr << "error finding necessary "
+                                                 "entry in configuration\n";
+                                    return;
+                                }
+
+                                powerSupplies.emplace_back(
+                                    std::make_unique<PowerSupply>(
+                                        *configName,
+                                        static_cast<uint8_t>(*configBus),
+                                        static_cast<uint8_t>(*configAddress),
+                                        conn));
+                                numberOfPSU++;
+                            },
+                            serviceName.c_str(), pathName.c_str(),
+                            "org.freedesktop.DBus.Properties", "GetAll",
+                            interface);
+                    }
+                }
+            }
+        },
+        "xyz.openbmc_project.ObjectMapper",
+        "/xyz/openbmc_project/object_mapper",
+        "xyz.openbmc_project.ObjectMapper", "GetSubTree",
+        "/xyz/openbmc_project/inventory/system/powersupply", 2,
+        psuInterfaceTypes);
+}
+
+PowerSupply::PowerSupply(
+    std::string name, uint8_t bus, uint8_t address,
+    const std::shared_ptr<sdbusplus::asio::connection>& dbusConnection) :
+    name(name),
+    bus(bus), address(address)
+{
+    getPSUEvent(psuEventInterface, dbusConnection, name, state);
+    if (debug)
+    {
+        std::cerr << "psu state " << static_cast<int>(state) << "\n";
+    }
+}
+
+PowerSupply::~PowerSupply()
+{
+}
diff --git a/psu-manager/src/redundancyMain.cpp b/psu-manager/src/redundancyMain.cpp
new file mode 100644
index 0000000..fa147c5
--- /dev/null
+++ b/psu-manager/src/redundancyMain.cpp
@@ -0,0 +1,31 @@
+/*
+// Copyright (c) 2019 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#include <coldRedundancy.hpp>
+#include <sdbusplus/asio/object_server.hpp>
+
+int main(int argc, char** argv)
+{
+    boost::asio::io_service io;
+    auto systemBus = std::make_shared<sdbusplus::asio::connection>(io);
+
+    systemBus->request_name("xyz.openbmc_project.PSURedundancy");
+    sdbusplus::asio::object_server objectServer(systemBus);
+
+    ColdRedundancy coldRedundancy(io, objectServer, systemBus);
+
+    return 0;
+}
diff --git a/psu-manager/src/utility.cpp b/psu-manager/src/utility.cpp
new file mode 100644
index 0000000..0b9581e
--- /dev/null
+++ b/psu-manager/src/utility.cpp
@@ -0,0 +1,102 @@
+/*
+// Copyright (c) 2019 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#include "utility.hpp"
+
+#include <boost/algorithm/string/predicate.hpp>
+#include <phosphor-logging/elog-errors.hpp>
+
+extern "C" {
+#include <i2c/smbus.h>
+#include <linux/i2c-dev.h>
+}
+
+void getPSUEvent(const std::array<const char*, 1>& configTypes,
+                 const std::shared_ptr<sdbusplus::asio::connection>& conn,
+                 const std::string& psuName, PSUState& state)
+{
+
+    conn->async_method_call(
+        [&conn, &state, &psuName, &configTypes](
+            const boost::system::error_code ec, GetSubTreeType subtree) {
+            if (ec)
+            {
+                std::cerr << "Exception happened when communicating to "
+                             "ObjectMapper\n";
+                return;
+            }
+            state = PSUState::normal;
+
+            for (const auto& object : subtree)
+            {
+                std::string pathStr = object.first;
+
+                // /State/Decorator/PSUx_OperationalStatus
+                auto slantingPos = pathStr.find_last_of("/\\") + 1;
+                std::string statePSUName = pathStr.substr(slantingPos);
+                auto hypenPos = statePSUName.find("_");
+
+                std::string name = statePSUName.substr(0, hypenPos);
+                if (name != psuName)
+                {
+                    continue;
+                }
+                for (const auto& serviceIface : object.second)
+                {
+                    std::string serviceName = serviceIface.first;
+                    for (const auto& interface : serviceIface.second)
+                    {
+                        // only get property of matched interface
+                        bool isIfaceMatched = false;
+                        for (const auto& type : configTypes)
+                        {
+                            if (type == interface)
+                            {
+                                isIfaceMatched = true;
+                                break;
+                            }
+                        }
+                        if (!isIfaceMatched)
+                            continue;
+
+                        conn->async_method_call(
+                            [&conn, &state](const boost::system::error_code ec,
+                                            const bool& result) {
+                                if (ec)
+                                {
+                                    std::cerr << "Exception happened when get "
+                                                 "functional propert\n";
+                                    return;
+                                }
+
+                                if (!result)
+                                {
+                                    state = PSUState::acLost;
+                                }
+                                return;
+                            },
+                            serviceName.c_str(), pathStr.c_str(),
+                            "org.freedesktop.DBus.Properties", "Get",
+                            interface.c_str(), "functional");
+                    }
+                }
+            }
+        },
+        "xyz.openbmc_project.ObjectMapper",
+        "/xyz/openbmc_project/object_mapper",
+        "xyz.openbmc_project.ObjectMapper", "GetSubTree",
+        "/xyz/openbmc_project/State/Decorator", 1, configTypes);
+}