xref: /drivers/peripheral/usb/net/include/usb_net_net.h

/*
 * Copyright (c) 2024 Archermind Technology (Nanjing) Co. Ltd.
 *
 * HDF is dual licensed: you can use it either under the terms of
 * the GPL, or the BSD license, at your option.
 * See the LICENSE file in the root of this repository for complete details.
 */

#ifndef USB_NET_NET_H
#define USB_NET_NET_H

#include "hdf_base.h"
#include "hdf_device_desc.h"

#define DEFAULT_MTU          1500
#define DEFAULT_NET_HEAD_LEN 14
#define INDEX_ZERO  0
#define INDEX_ONE   1
#define INDEX_TWO   2
/**
 * ether_addr_copy - Copy an Ethernet address
 * @dst: Pointer to a six-byte array Ethernet address destination
 * @src: Pointer to a six-byte array Ethernet address source
 *
 * Please note: dst & src must both be aligned to uint16_t.
 */
#if defined(__i386) || defined(__x86_64) || defined(__s390x__) || defined(__aarch64__)
#define CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 1
#endif

static inline void etherAddrCopy(uint8_t *dst, const uint8_t *src)
{
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
    *(uint32_t *)dst = *(const uint32_t *)src;
    *(uint16_t *)(dst + 4) = *(const uint16_t *)(src + 4);
#else
    uint16_t *a = (uint16_t *)dst;
    const uint16_t *b = (const uint16_t *)src;

    a[INDEX_ZERO] = b[INDEX_ZERO];
    a[INDEX_ONE]  = b[INDEX_ONE];
    a[INDEX_TWO]  = b[INDEX_TWO];
#endif
}

void UsbnetWriteLog(char *buff, int size, int tag);

#endif