/*-
 * Copyright (c) 2015-2016 Mellanox Technologies, Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice unmodified, this list of conditions, and the following
 *    disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef _LINUXKPI_LINUX_ETHERDEVICE_H_
#define _LINUXKPI_LINUX_ETHERDEVICE_H_

#include <linux/types.h>
#include <linux/device.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>

#include <sys/random.h>
#include <sys/libkern.h>

#define ETH_MODULE_SFF_8079             1
#define ETH_MODULE_SFF_8079_LEN         256
#define ETH_MODULE_SFF_8472             2
#define ETH_MODULE_SFF_8472_LEN         512
#define ETH_MODULE_SFF_8636             3
#define ETH_MODULE_SFF_8636_LEN         256
#define ETH_MODULE_SFF_8436             4
#define ETH_MODULE_SFF_8436_LEN         256

struct ethtool_eeprom {
        u32     offset;
        u32     len;
};

struct ethtool_modinfo {
        u32     type;
        u32     eeprom_len;
};

static inline bool
is_zero_ether_addr(const u8 * addr)
{
        return ((addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]) ==
            0x00);
}

static inline bool
is_unicast_ether_addr(const u8 * addr)
{
        return ((addr[0] & 0x01) == 0x00);
}

static inline bool
is_multicast_ether_addr(const u8 * addr)
{
        return ((addr[0] & 0x01) == 0x01);
}

static inline bool
is_broadcast_ether_addr(const u8 * addr)
{
        return ((addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
            0xff);
}

static inline bool
is_valid_ether_addr(const u8 * addr)
{
        return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr);
}

static inline void
ether_addr_copy(u8 * dst, const u8 * src)
{
        memcpy(dst, src, 6);
}

static inline bool
ether_addr_equal_unaligned(const u8 *pa, const u8 *pb)
{
        return (memcmp(pa, pb, 6) == 0);
}
#define ether_addr_equal(_pa, _pb)      ether_addr_equal_unaligned(_pa, _pb)

static inline bool
ether_addr_equal_64bits(const u8 *pa, const u8 *pb)
{
        return (memcmp(pa, pb, 6) == 0);
}

static inline void
eth_broadcast_addr(u8 *pa)
{
        memset(pa, 0xff, 6);
}

static inline void
eth_zero_addr(u8 *pa)
{
        memset(pa, 0, 6);
}

static inline void
random_ether_addr(u8 *dst)
{
        arc4random_buf(dst, 6);

        dst[0] &= 0xfe;
        dst[0] |= 0x02;
}

static inline void
eth_random_addr(u8 *dst)
{

        random_ether_addr(dst);
}

static inline int
device_get_mac_address(struct device *dev, char *dst)
{

        /* XXX get mac address from FDT? */
        return (-ENOENT);
}

/* Returns network byte order. */
static inline uint16_t
eth_type_trans(struct sk_buff *skb, struct net_device *dev)
{
        pr_debug("%s: TODO\n", __func__);
        return (htons(ETHERTYPE_8023));
}

static inline void
eth_hw_addr_set(struct net_device *dev, const u8 *addr)
{
        pr_debug("%s: TODO (if we want to)\n", __func__);
}

static inline int
eth_platform_get_mac_address(struct device *dev __unused, u8 *addr __unused)
{
        pr_debug("%s: TODO\n", __func__);
        return (-ENODEV);
}

#endif                                  /* _LINUXKPI_LINUX_ETHERDEVICE_H_ */