1 /* 2 * Copyright (C) 2021 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 17 #pragma once 18 19 #include <android-base/chrono_utils.h> 20 21 #include <chrono> 22 #include <queue> 23 #include <shared_mutex> 24 #include <string> 25 #include <unordered_map> 26 #include <unordered_set> 27 28 #include "thermal_info.h" 29 30 namespace android { 31 namespace hardware { 32 namespace thermal { 33 namespace V2_0 { 34 namespace implementation { 35 36 using android::base::boot_clock; 37 38 struct PowerSample { 39 uint64_t energy_counter; 40 uint64_t duration; 41 }; 42 43 struct PowerStatus { 44 boot_clock::time_point last_update_time; 45 // A vector to record the queues of power sample history. 46 std::vector<std::queue<PowerSample>> power_history; 47 float last_updated_avg_power; 48 }; 49 50 // A helper class for monitoring power rails. 51 class PowerFiles { 52 public: 53 PowerFiles() = default; 54 ~PowerFiles() = default; 55 // Disallow copy and assign. 56 PowerFiles(const PowerFiles &) = delete; 57 void operator=(const PowerFiles &) = delete; 58 bool registerPowerRailsToWatch(std::string_view config_path); 59 // Update the power data from ODPM sysfs 60 bool refreshPowerStatus(void); 61 // Get power status map GetPowerStatusMap()62 const std::unordered_map<std::string, PowerStatus> &GetPowerStatusMap() const { 63 std::shared_lock<std::shared_mutex> _lock(power_status_map_mutex_); 64 return power_status_map_; 65 } 66 // Get power rail info map GetPowerRailInfoMap()67 const std::unordered_map<std::string, PowerRailInfo> &GetPowerRailInfoMap() const { 68 return power_rail_info_map_; 69 } 70 71 private: 72 // Update energy value to energy_info_map_, return false if the value is failed to update. 73 bool updateEnergyValues(void); 74 // Compute the average power for physical power rail. 75 float updateAveragePower(std::string_view power_rail, std::queue<PowerSample> *power_history); 76 // Update the power data for the target power rail. 77 float updatePowerRail(std::string_view power_rail); 78 // Find the energy source path, return false if no energy source found. 79 bool findEnergySourceToWatch(void); 80 // The map to record the energy counter for each power rail. 81 std::unordered_map<std::string, PowerSample> energy_info_map_; 82 // The map to record the power data for each thermal sensor. 83 std::unordered_map<std::string, PowerStatus> power_status_map_; 84 mutable std::shared_mutex power_status_map_mutex_; 85 // The map to record the power rail information from thermal config 86 std::unordered_map<std::string, PowerRailInfo> power_rail_info_map_; 87 // The set to store the energy source paths 88 std::unordered_set<std::string> energy_path_set_; 89 }; 90 91 } // namespace implementation 92 } // namespace V2_0 93 } // namespace thermal 94 } // namespace hardware 95 } // namespace android 96