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/*
* Copyright (c) 2020-2022 Arm Limited.
*
* SPDX-License-Identifier: Apache-2.0
*
* 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
*
* 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.
*/
#ifndef MESSAGE_HANDLER_H
#define MESSAGE_HANDLER_H
#include "FreeRTOS.h"
#include "queue.h"
#include "semphr.h"
#include "message_queue.hpp"
#include <ethosu_core_interface.h>
#if defined(ETHOSU)
#include <ethosu_driver.h>
#endif
#include <inference_parser.hpp>
#include <inference_process.hpp>
#include <mailbox.hpp>
#include <algorithm>
#include <cstddef>
#include <cstdio>
#include <list>
#include <vector>
namespace MessageHandler {
template <typename T, size_t capacity = 10>
class Queue {
public:
using Predicate = std::function<bool(const T &data)>;
Queue() {
mutex = xSemaphoreCreateMutex();
size = xSemaphoreCreateCounting(capacity, 0u);
if (mutex == nullptr || size == nullptr) {
printf("Error: failed to allocate memory for inference queue\n");
}
}
~Queue() {
vSemaphoreDelete(mutex);
vSemaphoreDelete(size);
}
bool push(const T &data) {
xSemaphoreTake(mutex, portMAX_DELAY);
if (list.size() >= capacity) {
xSemaphoreGive(mutex);
return false;
}
list.push_back(data);
xSemaphoreGive(mutex);
// increase number of available inferences to pop
xSemaphoreGive(size);
return true;
}
void pop(T &data) {
// decrease the number of available inferences to pop
xSemaphoreTake(size, portMAX_DELAY);
xSemaphoreTake(mutex, portMAX_DELAY);
data = list.front();
list.pop_front();
xSemaphoreGive(mutex);
}
bool erase(Predicate pred) {
// let's optimistically assume we are removing an inference, so decrease pop
if (pdFALSE == xSemaphoreTake(size, 0)) {
// if there are no inferences return immediately
return false;
}
xSemaphoreTake(mutex, portMAX_DELAY);
auto found = std::find_if(list.begin(), list.end(), pred);
bool erased = found != list.end();
if (erased) {
list.erase(found);
}
xSemaphoreGive(mutex);
if (!erased) {
// no inference erased, so let's put the size count back
xSemaphoreGive(size);
}
return erased;
}
private:
std::list<T> list;
SemaphoreHandle_t mutex;
SemaphoreHandle_t size;
};
class IncomingMessageHandler {
public:
IncomingMessageHandler(EthosU::ethosu_core_queue &inputMessageQueue,
EthosU::ethosu_core_queue &outputMessageQueue,
Mailbox::Mailbox &mailbox,
std::shared_ptr<Queue<EthosU::ethosu_core_inference_req>> inferenceInputQueue,
QueueHandle_t inferenceOutputQueue,
SemaphoreHandle_t messageNotify);
void run();
private:
bool handleMessage();
bool handleInferenceOutput();
static void handleIrq(void *userArg);
void sendPong();
void sendErrorAndResetQueue(EthosU::ethosu_core_msg_err_type type, const char *message);
void sendVersionRsp();
void sendCapabilitiesRsp(uint64_t userArg);
void sendNetworkInfoRsp(uint64_t userArg, EthosU::ethosu_core_network_buffer &network);
void sendInferenceRsp(EthosU::ethosu_core_inference_rsp &inference);
void sendFailedInferenceRsp(uint64_t userArg, uint32_t status);
void sendCancelInferenceRsp(uint64_t userArg, uint32_t status);
void readCapabilties(EthosU::ethosu_core_msg_capabilities_rsp &rsp);
MessageQueue::QueueImpl inputMessageQueue;
MessageQueue::QueueImpl outputMessageQueue;
Mailbox::Mailbox &mailbox;
InferenceProcess::InferenceParser parser;
std::shared_ptr<Queue<EthosU::ethosu_core_inference_req>> inferenceInputQueue;
QueueHandle_t inferenceOutputQueue;
SemaphoreHandle_t messageNotify;
EthosU::ethosu_core_msg_capabilities_rsp capabilities;
};
class InferenceHandler {
public:
InferenceHandler(uint8_t *tensorArena,
size_t arenaSize,
std::shared_ptr<Queue<EthosU::ethosu_core_inference_req>> inferenceInputQueue,
QueueHandle_t inferenceOutputQueue,
SemaphoreHandle_t messageNotify);
void run();
private:
void runInference(EthosU::ethosu_core_inference_req &req, EthosU::ethosu_core_inference_rsp &rsp);
bool getInferenceJob(const EthosU::ethosu_core_inference_req &req, InferenceProcess::InferenceJob &job);
#if defined(ETHOSU)
friend void ::ethosu_inference_begin(struct ethosu_driver *drv, void *userArg);
friend void ::ethosu_inference_end(struct ethosu_driver *drv, void *userArg);
#endif
std::shared_ptr<Queue<EthosU::ethosu_core_inference_req>> inferenceInputQueue;
QueueHandle_t inferenceOutputQueue;
SemaphoreHandle_t messageNotify;
InferenceProcess::InferenceProcess inference;
EthosU::ethosu_core_inference_req *currentReq;
EthosU::ethosu_core_inference_rsp *currentRsp;
};
} // namespace MessageHandler
#endif
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