1 /* 2 * Copyright (C) 2022 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/hardware/thermal/2.0/IThermal.h> 20 21 #include <queue> 22 #include <shared_mutex> 23 #include <string> 24 #include <unordered_map> 25 #include <unordered_set> 26 27 #include "power_files.h" 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::hardware::hidl_vec; 37 using ::android::hardware::thermal::V2_0::IThermal; 38 using Temperature_2_0 = ::android::hardware::thermal::V2_0::Temperature; 39 using ::android::hardware::thermal::V2_0::TemperatureThreshold; 40 using ::android::hardware::thermal::V2_0::ThrottlingSeverity; 41 42 struct ThermalThrottlingStatus { 43 std::unordered_map<std::string, int> pid_power_budget_map; 44 std::unordered_map<std::string, int> pid_cdev_request_map; 45 std::unordered_map<std::string, int> hardlimit_cdev_request_map; 46 std::unordered_map<std::string, int> throttling_release_map; 47 std::unordered_map<std::string, int> cdev_status_map; 48 float err_integral; 49 float prev_err; 50 }; 51 52 // Return the target state of PID algorithm 53 size_t getTargetStateOfPID(const SensorInfo &sensor_info, const ThrottlingSeverity curr_severity); 54 55 // A helper class for conducting thermal throttling 56 class ThermalThrottling { 57 public: 58 ThermalThrottling() = default; 59 ~ThermalThrottling() = default; 60 // Disallow copy and assign. 61 ThermalThrottling(const ThermalThrottling &) = delete; 62 void operator=(const ThermalThrottling &) = delete; 63 64 // Clear throttling data 65 void clearThrottlingData(std::string_view sensor_name, const SensorInfo &sensor_info); 66 // Register map for throttling algo 67 bool registerThermalThrottling( 68 std::string_view sensor_name, const std::shared_ptr<ThrottlingInfo> &throttling_info, 69 const std::unordered_map<std::string, CdevInfo> &cooling_device_info_map); 70 // Register map for throttling release algo 71 bool registerThrottlingReleaseToWatch(std::string_view sensor_name, std::string_view cdev_name, 72 const BindedCdevInfo &binded_cdev_info); 73 // Get throttling status map GetThermalThrottlingStatusMap()74 const std::unordered_map<std::string, ThermalThrottlingStatus> &GetThermalThrottlingStatusMap() 75 const { 76 std::shared_lock<std::shared_mutex> _lock(thermal_throttling_status_map_mutex_); 77 return thermal_throttling_status_map_; 78 } 79 // update thermal throttling request for the specific sensor 80 void thermalThrottlingUpdate( 81 const Temperature_2_0 &temp, const SensorInfo &sensor_info, 82 const ThrottlingSeverity curr_severity, const std::chrono::milliseconds time_elapsed_ms, 83 const std::unordered_map<std::string, PowerStatus> &power_status_map, 84 const std::unordered_map<std::string, CdevInfo> &cooling_device_info_map); 85 86 // Compute the throttling target from all the sensors' request 87 void computeCoolingDevicesRequest(std::string_view sensor_name, const SensorInfo &sensor_info, 88 const ThrottlingSeverity curr_severity, 89 std::vector<std::string> *cooling_devices_to_update); 90 91 private: 92 // PID algo - get the total power budget 93 float updatePowerBudget(const Temperature_2_0 &temp, const SensorInfo &sensor_info, 94 std::chrono::milliseconds time_elapsed_ms, 95 ThrottlingSeverity curr_severity); 96 // PID algo - map the target throttling state according to the power budget 97 bool updateCdevRequestByPower( 98 const Temperature_2_0 &temp, const SensorInfo &sensor_info, 99 const ThrottlingSeverity curr_severity, const std::chrono::milliseconds time_elapsed_ms, 100 const std::unordered_map<std::string, CdevInfo> &cooling_device_info_map); 101 // Hard limit algo - assign the throttling state according to the severity 102 void updateCdevRequestBySeverity(std::string_view sensor_name, const SensorInfo &sensor_info, 103 ThrottlingSeverity curr_severity); 104 // Throttling release algo according to predefined power threshold 105 bool throttlingReleaseUpdate( 106 std::string_view sensor_name, 107 const std::unordered_map<std::string, CdevInfo> &cooling_device_info_map, 108 const std::unordered_map<std::string, PowerStatus> &power_status_map, 109 const ThrottlingSeverity severity, const SensorInfo &sensor_info); 110 111 mutable std::shared_mutex thermal_throttling_status_map_mutex_; 112 // Thermal throttling status from each sensor 113 std::unordered_map<std::string, ThermalThrottlingStatus> thermal_throttling_status_map_; 114 std::vector<std::string> cooling_devices_to_update; 115 }; 116 117 } // namespace implementation 118 } // namespace V2_0 119 } // namespace thermal 120 } // namespace hardware 121 } // namespace android 122