static int arp_req_set_proxy(struct net *net, struct net_device *dev, int on)
{
if (dev == NULL) {
IPV4_DEVCONF_ALL(net, PROXY_ARP) = on;
return 0;
}
if (__in_dev_get_rtnl(dev)) {
IN_DEV_CONF_SET(__in_dev_get_rtnl(dev), PROXY_ARP, on);
return 0;
}
return -ENXIO;
}
static int arp_req_delete(struct arpreq *r, struct net_device * dev)
{
int err;
__be32 ip = ((struct sockaddr_in *)&r->arp_pa)->sin_addr.s_addr;
struct neighbour *neigh;
if (r->arp_flags & ATF_PUBL) {
__be32 mask =
((struct sockaddr_in *)&r->arp_netmask)->sin_addr.s_addr;
if (mask == htonl(0xFFFFFFFF))
return pneigh_delete(&arp_tbl, &ip, dev);
if (mask == 0) {
if (dev == NULL) {
IPV4_DEVCONF_ALL(PROXY_ARP) = 0;
return 0;
}
if (__in_dev_get_rtnl(dev)) {
IN_DEV_CONF_SET(__in_dev_get_rtnl(dev),
PROXY_ARP, 0);
return 0;
}
return -ENXIO;
}
return -EINVAL;
}
if (dev == NULL) {
struct flowi fl = { .nl_u = { .ip4_u = { .daddr = ip,
.tos = RTO_ONLINK } } };
struct rtable * rt;
if ((err = ip_route_output_key(&rt, &fl)) != 0)
return err;
dev = rt->u.dst.dev;
ip_rt_put(rt);
if (!dev)
return -EINVAL;
}
err = -ENXIO;
neigh = neigh_lookup(&arp_tbl, &ip, dev);
if (neigh) {
if (neigh->nud_state&~NUD_NOARP)
err = neigh_update(neigh, NULL, NUD_FAILED,
NEIGH_UPDATE_F_OVERRIDE|
NEIGH_UPDATE_F_ADMIN);
neigh_release(neigh);
}
return err;
}
static int ipctl_set_proxyarp_by_ifindex(int ifIndex, int on)
{
struct net *net = &init_net;
struct net_device *dev;
struct in_device *in_dev;
dev = dev_get_by_index(net, ifIndex);
if (dev)
{
if (__in_dev_get_rtnl(dev))
{
in_dev = __in_dev_get_rtnl(dev);
IN_DEV_CONF_SET(in_dev, PROXY_ARP, on);
}
dev_put(dev); // Release reference.
}
return 0;
}
static int c2_up(struct net_device *netdev)
{
struct c2_port *c2_port = netdev_priv(netdev);
struct c2_dev *c2dev = c2_port->c2dev;
struct c2_element *elem;
struct c2_rxp_hdr *rxp_hdr;
struct in_device *in_dev;
size_t rx_size, tx_size;
int ret, i;
unsigned int netimr0;
if (netif_msg_ifup(c2_port))
pr_debug("%s: enabling interface\n", netdev->name);
c2_set_rxbufsize(c2_port);
rx_size = c2_port->rx_ring.count * sizeof(struct c2_rx_desc);
tx_size = c2_port->tx_ring.count * sizeof(struct c2_tx_desc);
c2_port->mem_size = tx_size + rx_size;
c2_port->mem = pci_alloc_consistent(c2dev->pcidev, c2_port->mem_size,
&c2_port->dma);
if (c2_port->mem == NULL) {
pr_debug("Unable to allocate memory for "
"host descriptor rings\n");
return -ENOMEM;
}
memset(c2_port->mem, 0, c2_port->mem_size);
if ((ret =
c2_rx_ring_alloc(&c2_port->rx_ring, c2_port->mem, c2_port->dma,
c2dev->mmio_rxp_ring))) {
pr_debug("Unable to create RX ring\n");
goto bail0;
}
if (c2_rx_fill(c2_port)) {
pr_debug("Unable to fill RX ring\n");
goto bail1;
}
if ((ret = c2_tx_ring_alloc(&c2_port->tx_ring, c2_port->mem + rx_size,
c2_port->dma + rx_size,
c2dev->mmio_txp_ring))) {
pr_debug("Unable to create TX ring\n");
goto bail1;
}
c2_port->tx_avail = c2_port->tx_ring.count - 1;
c2_port->tx_ring.to_use = c2_port->tx_ring.to_clean =
c2_port->tx_ring.start + c2dev->cur_tx;
BUG_ON(c2_port->tx_ring.to_use != c2_port->tx_ring.to_clean);
c2_reset(c2_port);
for (i = 0, elem = c2_port->rx_ring.start; i < c2_port->rx_ring.count;
i++, elem++) {
rxp_hdr = (struct c2_rxp_hdr *) elem->skb->data;
rxp_hdr->flags = 0;
__raw_writew((__force u16) cpu_to_be16(RXP_HRXD_READY),
elem->hw_desc + C2_RXP_FLAGS);
}
netif_start_queue(netdev);
writel(0, c2dev->regs + C2_IDIS);
netimr0 = readl(c2dev->regs + C2_NIMR0);
netimr0 &= ~(C2_PCI_HTX_INT | C2_PCI_HRX_INT);
writel(netimr0, c2dev->regs + C2_NIMR0);
in_dev = in_dev_get(netdev);
IN_DEV_CONF_SET(in_dev, ARP_IGNORE, 1);
in_dev_put(in_dev);
return 0;
bail1:
c2_rx_clean(c2_port);
kfree(c2_port->rx_ring.start);
bail0:
pci_free_consistent(c2dev->pcidev, c2_port->mem_size, c2_port->mem,
c2_port->dma);
return ret;
}
static int c2_up(struct net_device *netdev)
{
struct c2_port *c2_port = netdev_priv(netdev);
struct c2_dev *c2dev = c2_port->c2dev;
struct c2_element *elem;
struct c2_rxp_hdr *rxp_hdr;
struct in_device *in_dev;
size_t rx_size, tx_size;
int ret, i;
unsigned int netimr0;
if (netif_msg_ifup(c2_port))
pr_debug("%s: enabling interface\n", netdev->name);
/* Set the Rx buffer size based on MTU */
c2_set_rxbufsize(c2_port);
/* Allocate DMA'able memory for Tx/Rx host descriptor rings */
rx_size = c2_port->rx_ring.count * sizeof(struct c2_rx_desc);
tx_size = c2_port->tx_ring.count * sizeof(struct c2_tx_desc);
c2_port->mem_size = tx_size + rx_size;
c2_port->mem = pci_alloc_consistent(c2dev->pcidev, c2_port->mem_size,
&c2_port->dma);
if (c2_port->mem == NULL) {
pr_debug("Unable to allocate memory for "
"host descriptor rings\n");
return -ENOMEM;
}
memset(c2_port->mem, 0, c2_port->mem_size);
/* Create the Rx host descriptor ring */
if ((ret =
c2_rx_ring_alloc(&c2_port->rx_ring, c2_port->mem, c2_port->dma,
c2dev->mmio_rxp_ring))) {
pr_debug("Unable to create RX ring\n");
goto bail0;
}
/* Allocate Rx buffers for the host descriptor ring */
if (c2_rx_fill(c2_port)) {
pr_debug("Unable to fill RX ring\n");
goto bail1;
}
/* Create the Tx host descriptor ring */
if ((ret = c2_tx_ring_alloc(&c2_port->tx_ring, c2_port->mem + rx_size,
c2_port->dma + rx_size,
c2dev->mmio_txp_ring))) {
pr_debug("Unable to create TX ring\n");
goto bail1;
}
/* Set the TX pointer to where we left off */
c2_port->tx_avail = c2_port->tx_ring.count - 1;
c2_port->tx_ring.to_use = c2_port->tx_ring.to_clean =
c2_port->tx_ring.start + c2dev->cur_tx;
/* missing: Initialize MAC */
BUG_ON(c2_port->tx_ring.to_use != c2_port->tx_ring.to_clean);
/* Reset the adapter, ensures the driver is in sync with the RXP */
c2_reset(c2_port);
/* Reset the READY bit in the sk_buff RXP headers & adapter HRXDQ */
for (i = 0, elem = c2_port->rx_ring.start; i < c2_port->rx_ring.count;
i++, elem++) {
rxp_hdr = (struct c2_rxp_hdr *) elem->skb->data;
rxp_hdr->flags = 0;
__raw_writew((__force u16) cpu_to_be16(RXP_HRXD_READY),
elem->hw_desc + C2_RXP_FLAGS);
}
/* Enable network packets */
netif_start_queue(netdev);
/* Enable IRQ */
writel(0, c2dev->regs + C2_IDIS);
netimr0 = readl(c2dev->regs + C2_NIMR0);
netimr0 &= ~(C2_PCI_HTX_INT | C2_PCI_HRX_INT);
writel(netimr0, c2dev->regs + C2_NIMR0);
/* Tell the stack to ignore arp requests for ipaddrs bound to
* other interfaces. This is needed to prevent the host stack
* from responding to arp requests to the ipaddr bound on the
* rdma interface.
*/
in_dev = in_dev_get(netdev);
IN_DEV_CONF_SET(in_dev, ARP_IGNORE, 1);
in_dev_put(in_dev);
return 0;
bail1:
c2_rx_clean(c2_port);
kfree(c2_port->rx_ring.start);
bail0:
pci_free_consistent(c2dev->pcidev, c2_port->mem_size, c2_port->mem,
c2_port->dma);
return ret;
}
static int arp_req_set(struct arpreq *r, struct net_device * dev)
{
__be32 ip = ((struct sockaddr_in *) &r->arp_pa)->sin_addr.s_addr;
struct neighbour *neigh;
int err;
if (r->arp_flags&ATF_PUBL) {
__be32 mask = ((struct sockaddr_in *) &r->arp_netmask)->sin_addr.s_addr;
if (mask && mask != htonl(0xFFFFFFFF))
return -EINVAL;
if (!dev && (r->arp_flags & ATF_COM)) {
dev = dev_getbyhwaddr(&init_net, r->arp_ha.sa_family, r->arp_ha.sa_data);
if (!dev)
return -ENODEV;
}
if (mask) {
if (pneigh_lookup(&arp_tbl, &ip, dev, 1) == NULL)
return -ENOBUFS;
return 0;
}
if (dev == NULL) {
IPV4_DEVCONF_ALL(PROXY_ARP) = 1;
return 0;
}
if (__in_dev_get_rtnl(dev)) {
IN_DEV_CONF_SET(__in_dev_get_rtnl(dev), PROXY_ARP, 1);
return 0;
}
return -ENXIO;
}
if (r->arp_flags & ATF_PERM)
r->arp_flags |= ATF_COM;
if (dev == NULL) {
struct flowi fl = { .nl_u = { .ip4_u = { .daddr = ip,
.tos = RTO_ONLINK } } };
struct rtable * rt;
if ((err = ip_route_output_key(&rt, &fl)) != 0)
return err;
dev = rt->u.dst.dev;
ip_rt_put(rt);
if (!dev)
return -EINVAL;
}
switch (dev->type) {
#ifdef CONFIG_FDDI
case ARPHRD_FDDI:
/*
* According to RFC 1390, FDDI devices should accept ARP
* hardware types of 1 (Ethernet). However, to be more
* robust, we'll accept hardware types of either 1 (Ethernet)
* or 6 (IEEE 802.2).
*/
if (r->arp_ha.sa_family != ARPHRD_FDDI &&
r->arp_ha.sa_family != ARPHRD_ETHER &&
r->arp_ha.sa_family != ARPHRD_IEEE802)
return -EINVAL;
break;
#endif
default:
if (r->arp_ha.sa_family != dev->type)
return -EINVAL;
break;
}
neigh = __neigh_lookup_errno(&arp_tbl, &ip, dev);
err = PTR_ERR(neigh);
if (!IS_ERR(neigh)) {
unsigned state = NUD_STALE;
if (r->arp_flags & ATF_PERM)
state = NUD_PERMANENT;
err = neigh_update(neigh, (r->arp_flags&ATF_COM) ?
r->arp_ha.sa_data : NULL, state,
NEIGH_UPDATE_F_OVERRIDE|
NEIGH_UPDATE_F_ADMIN);
neigh_release(neigh);
}
return err;
}
