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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.hardware.neuralnetworks@1.1;
import @1.0::ErrorStatus;
import @1.0::IDevice;
import @1.0::IPreparedModelCallback;
/**
* This interface represents a device driver.
*/
interface IDevice extends @1.0::IDevice {
/**
* Gets the capabilities of a driver.
*
* Note that @1.1::Capabilities provides performance information
* on relaxed calculations, whereas @1.0::Capabilities does not.
*
* @return status Error status of the call, must be:
* - NONE if successful
* - DEVICE_UNAVAILABLE if driver is offline or busy
* - GENERAL_FAILURE if there is an unspecified error
* @return capabilities Capabilities of the driver.
*/
getCapabilities_1_1() generates (ErrorStatus status, Capabilities capabilities);
/**
* Gets the supported operations in a model.
*
* getSupportedOperations indicates which operations of a model are fully
* supported by the vendor driver. If an operation may not be supported for
* any reason, getSupportedOperations must return false for that operation.
*
* @param model A model whose operations--and their corresponding
* operands--are to be verified by the driver.
* @return status Error status of the call, must be:
* - NONE if successful
* - DEVICE_UNAVAILABLE if driver is offline or busy
* - GENERAL_FAILURE if there is an unspecified error
* - INVALID_ARGUMENT if provided model is invalid
* @return supportedOperations A list of supported operations, where true
* indicates the operation is supported and
* false indicates the operation is not
* supported. The index of "supported"
* corresponds with the index of the operation
* it is describing.
*/
getSupportedOperations_1_1(Model model)
generates (ErrorStatus status, vec<bool> supportedOperations);
/**
* Creates a prepared model for execution.
*
* prepareModel is used to make any necessary transformations or alternative
* representations to a model for execution, possiblly including
* transformations on the constant data, optimization on the model's graph,
* or compilation into the device's native binary format. The model itself
* is not changed.
*
* The model is prepared asynchronously with respect to the caller. The
* prepareModel function must verify the inputs to the prepareModel function
* are correct. If there is an error, prepareModel must immediately invoke
* the callback with the appropriate ErrorStatus value and nullptr for the
* IPreparedModel, then return with the same ErrorStatus. If the inputs to
* the prepareModel function are valid and there is no error, prepareModel
* must launch an asynchronous task to prepare the model in the background,
* and immediately return from prepareModel with ErrorStatus::NONE. If the
* asynchronous task fails to launch, prepareModel must immediately invoke
* the callback with ErrorStatus::GENERAL_FAILURE and nullptr for the
* IPreparedModel, then return with ErrorStatus::GENERAL_FAILURE.
*
* When the asynchronous task has finished preparing the model, it must
* immediately invoke the callback function provided as an input to
* prepareModel. If the model was prepared successfully, the callback object
* must be invoked with an error status of ErrorStatus::NONE and the
* produced IPreparedModel object. If an error occurred preparing the model,
* the callback object must be invoked with the appropriate ErrorStatus
* value and nullptr for the IPreparedModel.
*
* The only information that may be unknown to the model at this stage is
* the shape of the tensors, which may only be known at execution time. As
* such, some driver services may return partially prepared models, where
* the prepared model can only be finished when it is paired with a set of
* inputs to the model. Note that the same prepared model object can be
* used with different shapes of inputs on different (possibly concurrent)
* executions.
*
* Multiple threads can call prepareModel on the same model concurrently.
*
* @param model The model to be prepared for execution.
* @param preference Indicates the intended execution behavior of a prepared
* model.
* @param callback A callback object used to return the error status of
* preparing the model for execution and the prepared model
* if successful, nullptr otherwise. The callback object's
* notify function must be called exactly once, even if the
* model could not be prepared.
* @return status Error status of launching a task which prepares the model
* in the background; must be:
* - NONE if preparation task is successfully launched
* - DEVICE_UNAVAILABLE if driver is offline or busy
* - GENERAL_FAILURE if there is an unspecified error
* - INVALID_ARGUMENT if one of the input arguments is
* invalid
*/
prepareModel_1_1(Model model, ExecutionPreference preference,
IPreparedModelCallback callback)
generates (ErrorStatus status);
};
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