path: root/drivers/infiniband/hw/i40iw/i40iw_utils.c

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* Copyright (c) 2015-2016 Intel Corporation.  All rights reserved.
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* OpenFabrics.org BSD license below:
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#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/if_vlan.h>
#include <linux/crc32.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/init.h>
#include <linux/io.h>
#include <asm/irq.h>
#include <asm/byteorder.h>
#include <net/netevent.h>
#include <net/neighbour.h>
#include "i40iw.h"

/**
 * i40iw_arp_table - manage arp table
 * @iwdev: iwarp device
 * @ip_addr: ip address for device
 * @mac_addr: mac address ptr
 * @action: modify, delete or add
 */
int i40iw_arp_table(struct i40iw_device *iwdev,
		    u32 *ip_addr,
		    bool ipv4,
		    u8 *mac_addr,
		    u32 action)
{
	int arp_index;
	int err;
	u32 ip[4];

	if (ipv4) {
		memset(ip, 0, sizeof(ip));
		ip[0] = *ip_addr;
	} else {
		memcpy(ip, ip_addr, sizeof(ip));
	}

	for (arp_index = 0; (u32)arp_index < iwdev->arp_table_size; arp_index++)
		if (memcmp(iwdev->arp_table[arp_index].ip_addr, ip, sizeof(ip)) == 0)
			break;
	switch (action) {
	case I40IW_ARP_ADD:
		if (arp_index != iwdev->arp_table_size)
			return -1;

		arp_index = 0;
		err = i40iw_alloc_resource(iwdev, iwdev->allocated_arps,
					   iwdev->arp_table_size,
					   (u32 *)&arp_index,
					   &iwdev->next_arp_index);

		if (err)
			return err;

		memcpy(iwdev->arp_table[arp_index].ip_addr, ip, sizeof(ip));
		ether_addr_copy(iwdev->arp_table[arp_index].mac_addr, mac_addr);
		break;
	case I40IW_ARP_RESOLVE:
		if (arp_index ==