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 "config.h"
17 
18 #include "manager.hpp"
19 
20 #include "dbus_paths.hpp"
21 #include "sdbusplus.hpp"
22 #include "utility.hpp"
23 
24 #include <unistd.h>
25 
26 #include <phosphor-logging/elog-errors.hpp>
27 #include <phosphor-logging/elog.hpp>
28 #include <phosphor-logging/log.hpp>
29 #include <sdbusplus/bus.hpp>
30 #include <xyz/openbmc_project/Common/error.hpp>
31 
32 #include <algorithm>
33 #include <filesystem>
34 
35 namespace phosphor
36 {
37 namespace fan
38 {
39 namespace control
40 {
41 
42 using namespace phosphor::logging;
43 namespace fs = std::filesystem;
44 
45 constexpr auto SYSTEMD_SERVICE = "org.freedesktop.systemd1";
46 constexpr auto SYSTEMD_OBJ_PATH = "/org/freedesktop/systemd1";
47 constexpr auto SYSTEMD_INTERFACE = "org.freedesktop.systemd1.Manager";
48 constexpr auto FAN_CONTROL_READY_TARGET = "obmc-fan-control-ready@0.target";
49 
50 /**
51  * Check if a condition is true. Conditions are used to determine
52  * which fan zone to use.
53  *
54  * @param[in] bus       - The D-Bus bus object
55  * @param[in] condition - The condition to check if true
56  * @return result       - True if the condition is true
57  */
58 bool checkCondition(sdbusplus::bus_t& bus, const Condition& c)
59 {
60     auto& type = std::get<conditionTypePos>(c);
61     auto& properties = std::get<conditionPropertyListPos>(c);
62 
63     for (auto& p : properties)
64     {
65         auto value = std::get<propertyValuePos>(p);
66 
67         // TODO openbmc/openbmc#1769: Support more types than just getProperty.
68         if (type.compare("getProperty") == 0)
69         {
70             auto propertyValue = util::SDBusPlus::getProperty<decltype(value)>(
71                 bus, std::get<propertyPathPos>(p),
72                 std::get<propertyInterfacePos>(p),
73                 std::get<propertyNamePos>(p));
74 
75             if (value != propertyValue)
76             {
77                 return false;
78             }
79         }
80     }
81     return true;
82 }
83 
84 // Note: Future code will check 'mode' before starting control algorithm
85 Manager::Manager(sdbusplus::bus_t& bus, const sdeventplus::Event& event,
86                  Mode mode) :
87     _bus(bus),
88     _objMgr(bus, CONTROL_OBJPATH)
89 {
90     // Create the appropriate Zone objects based on the
91     // actual system configuration.
92 
93     // Find the 1 ZoneGroup that meets all of its conditions
94     for (auto& group : _zoneLayouts)
95     {
96         auto& conditions = std::get<conditionListPos>(group);
97 
98         if (std::all_of(conditions.begin(), conditions.end(),
99                         [&bus](const auto& condition) {
100                             return checkCondition(bus, condition);
101                         }))
102         {
103             // Create a Zone object for each zone in this group
104             auto& zones = std::get<zoneListPos>(group);
105 
106             for (auto& z : zones)
107             {
108                 fs::path path{CONTROL_OBJPATH};
109                 path /= std::to_string(std::get<zoneNumPos>(z));
110                 _zones.emplace(std::get<zoneNumPos>(z),
111                                std::make_unique<Zone>(mode, _bus, path.string(),
112                                                       event, z));
113             }
114 
115             break;
116         }
117     }
118 
119     if (mode == Mode::control)
120     {
121         bus.request_name(CONTROL_BUSNAME);
122     }
123 }
124 
125 void Manager::doInit(const sdeventplus::Event& /*event*/)
126 {
127     for (auto& z : _zones)
128     {
129         z.second->setFullSpeed();
130     }
131     auto delay = _powerOnDelay;
132     while (delay > 0)
133     {
134         delay = sleep(delay);
135     }
136 
137     util::SDBusPlus::callMethod(_bus, SYSTEMD_SERVICE, SYSTEMD_OBJ_PATH,
138                                 SYSTEMD_INTERFACE, "StartUnit",
139                                 FAN_CONTROL_READY_TARGET, "replace");
140 }
141 
142 } // namespace control
143 } // namespace fan
144 } // namespace phosphor
145