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 "sdbusplus.hpp"
21 #include "utility.hpp"
22 #ifdef CONTROL_USE_JSON
23 #include "json_parser.hpp"
24 #endif
25 
26 #include <unistd.h>
27 
28 #include <phosphor-logging/elog-errors.hpp>
29 #include <phosphor-logging/elog.hpp>
30 #include <phosphor-logging/log.hpp>
31 #include <sdbusplus/bus.hpp>
32 #include <xyz/openbmc_project/Common/error.hpp>
33 
34 #include <algorithm>
35 #include <experimental/filesystem>
36 
37 namespace phosphor
38 {
39 namespace fan
40 {
41 namespace control
42 {
43 
44 using namespace phosphor::logging;
45 namespace fs = std::experimental::filesystem;
46 
47 constexpr auto SYSTEMD_SERVICE = "org.freedesktop.systemd1";
48 constexpr auto SYSTEMD_OBJ_PATH = "/org/freedesktop/systemd1";
49 constexpr auto SYSTEMD_INTERFACE = "org.freedesktop.systemd1.Manager";
50 constexpr auto FAN_CONTROL_READY_TARGET = "obmc-fan-control-ready@0.target";
51 
52 /**
53  * Check if a condition is true. Conditions are used to determine
54  * which fan zone to use.
55  *
56  * @param[in] bus       - The D-Bus bus object
57  * @param[in] condition - The condition to check if true
58  * @return result       - True if the condition is true
59  */
60 bool checkCondition(sdbusplus::bus::bus& bus, const Condition& c)
61 {
62     auto& type = std::get<conditionTypePos>(c);
63     auto& properties = std::get<conditionPropertyListPos>(c);
64 
65     for (auto& p : properties)
66     {
67         auto value = std::get<propertyValuePos>(p);
68 
69         // TODO openbmc/openbmc#1769: Support more types than just getProperty.
70         if (type.compare("getProperty") == 0)
71         {
72             auto propertyValue = util::SDBusPlus::getProperty<decltype(value)>(
73                 bus, std::get<propertyPathPos>(p),
74                 std::get<propertyInterfacePos>(p),
75                 std::get<propertyNamePos>(p));
76 
77             if (value != propertyValue)
78             {
79                 return false;
80             }
81         }
82     }
83     return true;
84 }
85 
86 // Note: Future code will check 'mode' before starting control algorithm
87 Manager::Manager(sdbusplus::bus::bus& bus, const sdeventplus::Event& event,
88                  Mode mode) :
89     _bus(bus),
90     _objMgr(bus, CONTROL_OBJPATH)
91 {
92     // Create the appropriate Zone objects based on the
93     // actual system configuration.
94 #ifdef CONTROL_USE_JSON
95     for (auto& group : getZoneGroups(bus))
96     {
97         // Create a Zone object for each zone in the group
98         for (auto& z : std::get<zoneListPos>(group))
99         {
100             fs::path path{CONTROL_OBJPATH};
101             path /= std::to_string(std::get<zoneNumPos>(z));
102             _zones.emplace(
103                 std::get<zoneNumPos>(z),
104                 std::make_unique<Zone>(mode, _bus, path.string(), event, z));
105         }
106     }
107 #else
108     // Find the 1 ZoneGroup that meets all of its conditions
109     for (auto& group : _zoneLayouts)
110     {
111         auto& conditions = std::get<conditionListPos>(group);
112 
113         if (std::all_of(conditions.begin(), conditions.end(),
114                         [&bus](const auto& condition) {
115                             return checkCondition(bus, condition);
116                         }))
117         {
118             // Create a Zone object for each zone in this group
119             auto& zones = std::get<zoneListPos>(group);
120 
121             for (auto& z : zones)
122             {
123                 fs::path path{CONTROL_OBJPATH};
124                 path /= std::to_string(std::get<zoneNumPos>(z));
125                 _zones.emplace(std::get<zoneNumPos>(z),
126                                std::make_unique<Zone>(mode, _bus, path.string(),
127                                                       event, z));
128             }
129 
130             break;
131         }
132     }
133 #endif
134 
135     if (mode == Mode::control)
136     {
137         bus.request_name(CONTROL_BUSNAME);
138     }
139 }
140 
141 void Manager::doInit()
142 {
143     for (auto& z : _zones)
144     {
145         z.second->setFullSpeed();
146     }
147 #ifdef CONTROL_USE_JSON
148     auto delay = getPowerOnDelay(_bus);
149 #else
150     auto delay = _powerOnDelay;
151 #endif
152     while (delay > 0)
153     {
154         delay = sleep(delay);
155     }
156 
157     util::SDBusPlus::callMethod(_bus, SYSTEMD_SERVICE, SYSTEMD_OBJ_PATH,
158                                 SYSTEMD_INTERFACE, "StartUnit",
159                                 FAN_CONTROL_READY_TARGET, "replace");
160 }
161 
162 } // namespace control
163 } // namespace fan
164 } // namespace phosphor
165