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      1 /*
      2  * Copyright (C) 2017 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 #define LOG_TAG "SampleDriver"
     18 
     19 #include "SampleDriver.h"
     20 
     21 #include "CpuExecutor.h"
     22 #include "HalInterfaces.h"
     23 
     24 #include <android-base/logging.h>
     25 #include <hidl/LegacySupport.h>
     26 #include <thread>
     27 
     28 namespace android {
     29 namespace nn {
     30 namespace sample_driver {
     31 
     32 Return<ErrorStatus> SampleDriver::prepareModel(const Model& model,
     33                                                const sp<IPreparedModelCallback>& callback) {
     34     if (VLOG_IS_ON(DRIVER)) {
     35         VLOG(DRIVER) << "prepareModel";
     36         logModelToInfo(model);
     37     }
     38     if (callback.get() == nullptr) {
     39         LOG(ERROR) << "invalid callback passed to prepareModel";
     40         return ErrorStatus::INVALID_ARGUMENT;
     41     }
     42     if (!validateModel(model)) {
     43         callback->notify(ErrorStatus::INVALID_ARGUMENT, nullptr);
     44         return ErrorStatus::INVALID_ARGUMENT;
     45     }
     46 
     47     // TODO: make asynchronous later
     48     sp<SamplePreparedModel> preparedModel = new SamplePreparedModel(model);
     49     if (!preparedModel->initialize()) {
     50        callback->notify(ErrorStatus::INVALID_ARGUMENT, nullptr);
     51        return ErrorStatus::INVALID_ARGUMENT;
     52     }
     53     callback->notify(ErrorStatus::NONE, preparedModel);
     54     return ErrorStatus::NONE;
     55 }
     56 
     57 Return<DeviceStatus> SampleDriver::getStatus() {
     58     VLOG(DRIVER) << "getStatus()";
     59     return DeviceStatus::AVAILABLE;
     60 }
     61 
     62 int SampleDriver::run() {
     63     android::hardware::configureRpcThreadpool(4, true);
     64     if (registerAsService(mName) != android::OK) {
     65         LOG(ERROR) << "Could not register service";
     66         return 1;
     67     }
     68     android::hardware::joinRpcThreadpool();
     69     LOG(ERROR) << "Service exited!";
     70     return 1;
     71 }
     72 
     73 bool SamplePreparedModel::initialize() {
     74     return setRunTimePoolInfosFromHidlMemories(&mPoolInfos, mModel.pools);
     75 }
     76 
     77 void SamplePreparedModel::asyncExecute(const Request& request,
     78                                        const sp<IExecutionCallback>& callback) {
     79     std::vector<RunTimePoolInfo> requestPoolInfos;
     80     if (!setRunTimePoolInfosFromHidlMemories(&requestPoolInfos, request.pools)) {
     81         callback->notify(ErrorStatus::GENERAL_FAILURE);
     82         return;
     83     }
     84 
     85     CpuExecutor executor;
     86     int n = executor.run(mModel, request, mPoolInfos, requestPoolInfos);
     87     VLOG(DRIVER) << "executor.run returned " << n;
     88     ErrorStatus executionStatus =
     89             n == ANEURALNETWORKS_NO_ERROR ? ErrorStatus::NONE : ErrorStatus::GENERAL_FAILURE;
     90     Return<void> returned = callback->notify(executionStatus);
     91     if (!returned.isOk()) {
     92         LOG(ERROR) << " hidl callback failed to return properly: " << returned.description();
     93     }
     94 }
     95 
     96 Return<ErrorStatus> SamplePreparedModel::execute(const Request& request,
     97                                                  const sp<IExecutionCallback>& callback) {
     98     VLOG(DRIVER) << "execute(" << toString(request) << ")";
     99     if (callback.get() == nullptr) {
    100         LOG(ERROR) << "invalid callback passed to execute";
    101         return ErrorStatus::INVALID_ARGUMENT;
    102     }
    103     if (!validateRequest(request, mModel)) {
    104         callback->notify(ErrorStatus::INVALID_ARGUMENT);
    105         return ErrorStatus::INVALID_ARGUMENT;
    106     }
    107 
    108     // This thread is intentionally detached because the sample driver service
    109     // is expected to live forever.
    110     std::thread([this, request, callback]{ asyncExecute(request, callback); }).detach();
    111 
    112     return ErrorStatus::NONE;
    113 }
    114 
    115 } // namespace sample_driver
    116 } // namespace nn
    117 } // namespace android
    118