| Vinay Kalia | f91dcb5 | 2018-10-02 12:59:08 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 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 | package android.hardware.power.stats@1.0; |
| 17 | |
| 18 | interface IPowerStats { |
| 19 | |
| 20 | /** |
| 21 | * Rail information: |
| 22 | * Reports information related to the rails being monitored. |
| 23 | * |
| 24 | * @return rails Information about monitored rails. |
| 25 | * @return status SUCCESS on success or NOT_SUPPORTED if |
| 26 | * feature is not enabled or FILESYSTEM_ERROR on filesystem nodes |
| 27 | * access error. |
| 28 | */ |
| 29 | getRailInfo() |
| 30 | generates(vec<RailInfo> rails, Status status); |
| 31 | |
| 32 | /** |
| 33 | * Rail level energy measurements for low frequency clients: |
| 34 | * Reports accumulated energy since boot on each rail. |
| 35 | * |
| 36 | * @param railIndices Indices of rails for which data is required. |
| 37 | * To get data for all rails pass an empty vector. Rail name to |
| 38 | * index mapping can be queried from getRailInfo() API. |
| 39 | * @return data Energy values since boot for all requested rails. |
| 40 | * @return status SUCCESS on success or NOT_SUPPORTED if |
| 41 | * feature is not enabled or FILESYSTEM_ERROR on filesystem nodes |
| 42 | * access error. |
| 43 | */ |
| 44 | getEnergyData(vec<uint32_t> railIndices) |
| 45 | generates(vec<EnergyData> data, Status status); |
| 46 | |
| 47 | /** |
| 48 | * Stream rail level power measurements for high frequency clients: |
| 49 | * Streams accumulated energy since boot on each rail. This API is |
| 50 | * asynchronous. |
| 51 | * |
| 52 | * @param timeMs Time(in ms) for which energyData should be streamed |
| 53 | * @return mqDesc Unsynchronous Fast Message Queue descriptor - One |
| 54 | * writer(power.stats HAL) multiple readers are supported. Reader |
| 55 | * should read faster than writer otherwise data might be |
| 56 | * overwritten. Data is present in following format in the queue: |
| 57 | * +-----------------------+ <-- |
| 58 | * | EnergyData for rail 1 | | |
| 59 | * +-----------------------+ | |
| 60 | * | EnergyData for rail 2 | | |
| 61 | * +-----------------------+ | |
| 62 | * | . | |-- 1st Sample |
| 63 | * | . | | |
| 64 | * | . | | |
| 65 | * +-----------------------+ | |
| 66 | * | EnergyData for rail n | | |
| 67 | * +-----------------------+ <-- |
| 68 | * | . | |
| 69 | * | . | |
| 70 | * | . | |
| 71 | * +-----------------------+ <-- |
| 72 | * | EnergyData for rail 1 | | |
| 73 | * +-----------------------+ | |
| 74 | * | EnergyData for rail 2 | | |
| 75 | * +-----------------------+ | |
| 76 | * | . | |-- kth Sample |
| 77 | * | . | | |
| 78 | * | . | | |
| 79 | * +-----------------------+ | |
| 80 | * | EnergyData for rail n | | |
| 81 | * +-----------------------+ <-- |
| 82 | * |
| 83 | * where, |
| 84 | * n = railsPerSample |
| 85 | * k = numSamples |
| 86 | * |
| 87 | * @return numSamples Number of samples which will be generated in timeMs. |
| 88 | * @return railsPerSample Number of rails measured per sample. |
| 89 | * @return status SUCCESS on success or FILESYSTEM_ERROR on filesystem |
| 90 | * nodes access or NOT_SUPPORTED if feature is not enabled. |
| 91 | */ |
| 92 | streamEnergyData(uint32_t timeMs) |
| 93 | generates(fmq_unsync<EnergyData> mqDesc, uint32_t numSamples, |
| 94 | uint32_t railsPerSample, Status status); |
| 95 | }; |