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 */
checkCondition(sdbusplus::bus_t & bus,const Condition & c)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
Manager(sdbusplus::bus_t & bus,const sdeventplus::Event & event,Mode mode)85 Manager::Manager(sdbusplus::bus_t& bus, const sdeventplus::Event& event,
86 Mode mode) : _bus(bus), _objMgr(bus, CONTROL_OBJPATH)
87 {
88 // Create the appropriate Zone objects based on the
89 // actual system configuration.
90
91 // Find the 1 ZoneGroup that meets all of its conditions
92 for (auto& group : _zoneLayouts)
93 {
94 auto& conditions = std::get<conditionListPos>(group);
95
96 if (std::all_of(conditions.begin(), conditions.end(),
97 [&bus](const auto& condition) {
98 return checkCondition(bus, condition);
99 }))
100 {
101 // Create a Zone object for each zone in this group
102 auto& zones = std::get<zoneListPos>(group);
103
104 for (auto& z : zones)
105 {
106 fs::path path{CONTROL_OBJPATH};
107 path /= std::to_string(std::get<zoneNumPos>(z));
108 _zones.emplace(std::get<zoneNumPos>(z),
109 std::make_unique<Zone>(mode, _bus, path.string(),
110 event, z));
111 }
112
113 break;
114 }
115 }
116
117 if (mode == Mode::control)
118 {
119 bus.request_name(CONTROL_BUSNAME);
120 }
121 }
122
doInit(const sdeventplus::Event &)123 void Manager::doInit(const sdeventplus::Event& /*event*/)
124 {
125 for (auto& z : _zones)
126 {
127 z.second->setFullSpeed();
128 }
129 auto delay = _powerOnDelay;
130 while (delay > 0)
131 {
132 delay = sleep(delay);
133 }
134
135 util::SDBusPlus::callMethod(_bus, SYSTEMD_SERVICE, SYSTEMD_OBJ_PATH,
136 SYSTEMD_INTERFACE, "StartUnit",
137 FAN_CONTROL_READY_TARGET, "replace");
138 }
139
140 } // namespace control
141 } // namespace fan
142 } // namespace phosphor
143