1 /**
2  * Copyright 2017 Google Inc.
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 "dbus_mode.hpp"
18 
19 #include <ipmid/api.h>
20 
21 #include <sdbusplus/bus.hpp>
22 #include <sdbusplus/message.hpp>
23 
24 #include <cstdint>
25 #include <string>
26 #include <variant>
27 
28 namespace pid_control
29 {
30 namespace ipmi
31 {
32 
33 static constexpr auto objectPath = "/xyz/openbmc_project/settings/fanctrl/zone";
34 static constexpr auto busName = "xyz.openbmc_project.State.FanCtrl";
35 static constexpr auto intf = "xyz.openbmc_project.Control.Mode";
36 static constexpr auto manualProperty = "Manual";
37 static constexpr auto failsafeProperty = "FailSafe";
38 static constexpr auto propertiesintf = "org.freedesktop.DBus.Properties";
39 
40 using Property = std::string;
41 using Value = std::variant<bool>;
42 using PropertyMap = std::map<Property, Value>;
43 
44 /* The following was copied directly from my manual thread handler. */
45 static std::string getControlPath(int8_t zone)
46 {
47     return std::string(objectPath) + std::to_string(zone);
48 }
49 
50 uint8_t DbusZoneControl::getFanCtrlProperty(uint8_t zoneId, bool* value,
51                                             const std::string& property)
52 {
53     std::string path = getControlPath(zoneId);
54 
55     auto propertyReadBus = sdbusplus::bus::new_system();
56     auto pimMsg = propertyReadBus.new_method_call(busName, path.c_str(),
57                                                   propertiesintf, "GetAll");
58     pimMsg.append(intf);
59 
60     try
61     {
62         PropertyMap propMap;
63 
64         /* a method could error but the call not error. */
65         auto valueResponseMsg = propertyReadBus.call(pimMsg);
66 
67         valueResponseMsg.read(propMap);
68 
69         *value = std::get<bool>(propMap[property]);
70     }
71     catch (const sdbusplus::exception::SdBusError& ex)
72     {
73         return IPMI_CC_INVALID;
74     }
75 
76     return IPMI_CC_OK;
77 }
78 
79 uint8_t DbusZoneControl::setFanCtrlProperty(uint8_t zoneId, bool value,
80                                             const std::string& property)
81 {
82     using Value = std::variant<bool>;
83     Value v{value};
84 
85     std::string path = getControlPath(zoneId);
86 
87     auto PropertyWriteBus = sdbusplus::bus::new_system();
88     auto pimMsg = PropertyWriteBus.new_method_call(busName, path.c_str(),
89                                                    propertiesintf, "Set");
90     pimMsg.append(intf);
91     pimMsg.append(property);
92     pimMsg.append(v);
93 
94     try
95     {
96         PropertyWriteBus.call_noreply(pimMsg);
97     }
98     catch (const sdbusplus::exception::SdBusError& ex)
99     {
100         return IPMI_CC_INVALID;
101     }
102 
103     /* TODO(venture): Should sanity check the result. */
104     return IPMI_CC_OK;
105 }
106 
107 } // namespace ipmi
108 } // namespace pid_control
109