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 "pid/builder.hpp"
18 
19 #include "conf.hpp"
20 #include "pid/controller.hpp"
21 #include "pid/fancontroller.hpp"
22 #include "pid/stepwisecontroller.hpp"
23 #include "pid/thermalcontroller.hpp"
24 #include "pid/zone.hpp"
25 #include "pid/zone_interface.hpp"
26 
27 #include <sdbusplus/bus.hpp>
28 
29 #include <cstdint>
30 #include <iostream>
31 #include <memory>
32 #include <string>
33 #include <unordered_map>
34 #include <vector>
35 
36 namespace pid_control
37 {
38 
39 static constexpr bool deferSignals = true;
40 static constexpr auto objectPath = "/xyz/openbmc_project/settings/fanctrl/zone";
41 
42 static std::string getControlPath(int64_t zone)
43 {
44     return std::string(objectPath) + std::to_string(zone);
45 }
46 
47 std::unordered_map<int64_t, std::unique_ptr<ZoneInterface>>
48     buildZones(const std::map<int64_t, conf::PIDConf>& zonePids,
49                std::map<int64_t, struct conf::ZoneConfig>& zoneConfigs,
50                SensorManager& mgr, sdbusplus::bus::bus& modeControlBus)
51 {
52     std::unordered_map<int64_t, std::unique_ptr<ZoneInterface>> zones;
53 
54     for (const auto& [zoneId, pidConfig] : zonePids)
55     {
56         /* The above shouldn't be necessary but is, and I am having trouble
57          * locating my notes on why.  If I recall correctly it was casting it
58          * down to a byte in at least some cases causing weird behaviors.
59          */
60         auto zoneConf = zoneConfigs.find(zoneId);
61         if (zoneConf == zoneConfigs.end())
62         {
63             /* The Zone doesn't have a configuration, bail. */
64             static constexpr auto err =
65                 "Bailing during load, missing Zone Configuration";
66             std::cerr << err << std::endl;
67             throw std::runtime_error(err);
68         }
69 
70         auto zone = std::make_unique<DbusPidZone>(
71             zoneId, zoneConf->second.minThermalOutput,
72             zoneConf->second.failsafePercent, mgr, modeControlBus,
73             getControlPath(zoneId).c_str(), deferSignals);
74 
75         std::cerr << "Zone Id: " << zone->getZoneID() << "\n";
76 
77         // For each PID create a Controller and a Sensor.
78         for (const auto& [name, info] : pidConfig)
79         {
80             std::vector<std::string> inputs;
81             std::cerr << "PID name: " << name << "\n";
82 
83             /*
84              * TODO(venture): Need to check if input is known to the
85              * SensorManager.
86              */
87             if (info.type == "fan")
88             {
89                 for (const auto& i : info.inputs)
90                 {
91                     inputs.push_back(i);
92                     zone->addFanInput(i);
93                 }
94 
95                 auto pid = FanController::createFanPid(zone.get(), name, inputs,
96                                                        info.pidInfo);
97                 zone->addFanPID(std::move(pid));
98             }
99             else if (isThermalType(info.type))
100             {
101                 for (const auto& i : info.inputs)
102                 {
103                     inputs.push_back(i);
104                     zone->addThermalInput(i);
105                 }
106 
107                 auto pid = ThermalController::createThermalPid(
108                     zone.get(), name, inputs, info.setpoint, info.pidInfo,
109                     getThermalType(info.type));
110 
111                 zone->addThermalPID(std::move(pid));
112             }
113             else if (info.type == "stepwise")
114             {
115                 for (const auto& i : info.inputs)
116                 {
117                     inputs.push_back(i);
118                     zone->addThermalInput(i);
119                 }
120                 auto stepwise = StepwiseController::createStepwiseController(
121                     zone.get(), name, inputs, info.stepwiseInfo);
122                 zone->addThermalPID(std::move(stepwise));
123             }
124 
125             std::cerr << "inputs: ";
126             for (const auto& i : inputs)
127             {
128                 std::cerr << i << ", ";
129             }
130             std::cerr << "\n";
131         }
132 
133         zone->emit_object_added();
134         zones[zoneId] = std::move(zone);
135     }
136 
137     return zones;
138 }
139 
140 } // namespace pid_control
141