driver_library/src/ethosu_stub.cpp

/*
 * SPDX-FileCopyrightText: Copyright 2020-2022 Arm Limited and/or its affiliates <open-source-office@arm.com>
 *
 * 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.
 */

#include <uapi/ethosu.h>

#include <ethosu.hpp>
#include <exception>
#include <iostream>

#include <fcntl.h>
#include <poll.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <unistd.h>

namespace EthosU {
int eopen(const char *p, int) {
    std::cout << "Opened filedescriptor for " << p;
    return 1;
}

int eclose(int) {
    return 0;
}

void *emmap(void *, size_t length, int, int, int, off_t) {
    void *d = malloc(length);
    return d;
}

int emunmap(void *addr, size_t) {
    free(addr);
    return 0;
}

int eioctl(int, unsigned long cmd, void *) {
    int result = 0;
    using namespace EthosU;

    switch (cmd) {
    case ETHOSU_IOCTL_PING:
        return result;
    case ETHOSU_IOCTL_VERSION_REQ:
        return result;
    case ETHOSU_IOCTL_CAPABILITIES_REQ:
        return result;
    case ETHOSU_IOCTL_BUFFER_CREATE:
        return result;
    case ETHOSU_IOCTL_BUFFER_SET:
        return result;
    case ETHOSU_IOCTL_BUFFER_GET:
        return result;
    case ETHOSU_IOCTL_NETWORK_CREATE:
        return result;
    case ETHOSU_IOCTL_INFERENCE_CREATE:
        return result;
    case ETHOSU_IOCTL_INFERENCE_STATUS:
        return result;
    default:
        throw EthosU::Exception("Unknown IOCTL");
    }
}

int eppoll(struct pollfd *, nfds_t, const struct timespec *tmo_p, const sigset_t *) {
    if (tmo_p == NULL) {
        // sleep one second
        usleep(1000000ul);
    } else {
        unsigned long t = tmo_p->tv_sec / 2;   // sleep half of the time
        t               = t * 1000ul * 1000ul; // sec to microsec
        usleep(t);
    }
    return 1;
}
} // namespace EthosU