1 /*
2  * Copyright (C) 2020 The Android Open Source Project
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 #pragma once
17 
18 #include <PowerStatsAidl.h>
19 
20 namespace aidl {
21 namespace android {
22 namespace hardware {
23 namespace power {
24 namespace stats {
25 
26 class DvfsStateResidencyDataProvider : public PowerStats::IStateResidencyDataProvider {
27   public:
28     class Config {
29       public:
30         // Power entity name to parse.
31         std::string powerEntityName;
32 
33         // List of state pairs (name to display, name to parse).
34         std::vector<std::pair<std::string, std::string>> states;
35     };
36     /*
37      * path - path to dvfs sysfs node.
38      * clockRate - clock rate in KHz.
39      */
40     DvfsStateResidencyDataProvider(std::string path, uint64_t clockRate, std::vector<Config> cfgs);
41     ~DvfsStateResidencyDataProvider() = default;
42 
43     /*
44      * See IStateResidencyDataProvider::getStateResidencies
45      */
46     bool getStateResidencies(
47         std::unordered_map<std::string, std::vector<StateResidency>> *residencies) override;
48 
49     /*
50      * See IStateResidencyDataProvider::getInfo
51      */
52     std::unordered_map<std::string, std::vector<State>> getInfo() override;
53 
54   protected:
55     std::vector<Config> mPowerEntities;
56 
57   private:
58     int32_t matchEntity(char const *line);
59     int32_t matchState(char const *line, const Config& powerEntity);
60     bool parseState(char const *line, uint64_t *duration, uint64_t *count);
61 
62     const std::string mPath;
63     const uint64_t mClockRate;
64 };
65 
66 }  // namespace stats
67 }  // namespace power
68 }  // namespace hardware
69 }  // namespace android
70 }  // namespace aidl
71