netxen: enable ip addr hashing
NX3031 hardware requires local IP addresses for packet
accumulation (LRO). IP address hashing is required to
distinguish a local TCP flow from others (forwarded or
guest).
This patch adds listener for IP and netdev events and
configures IP address in the firmware.
Signed-off-by: Amit Kumar Salecha <amit@netxen.com>
Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
index 4c7e4c2..b368326 100644
--- a/drivers/net/netxen/netxen_nic_main.c
+++ b/drivers/net/netxen/netxen_nic_main.c
@@ -39,6 +39,7 @@
#include <linux/if_vlan.h>
#include <net/ip.h>
#include <linux/ipv6.h>
+#include <linux/inetdevice.h>
MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
MODULE_LICENSE("GPL");
@@ -1780,6 +1781,125 @@
}
#endif
+#define is_netxen_netdev(dev) (dev->netdev_ops == &netxen_netdev_ops)
+
+static int
+netxen_destip_supported(struct netxen_adapter *adapter)
+{
+ if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
+ return 0;
+
+ if (adapter->ahw.cut_through)
+ return 0;
+
+ return 1;
+}
+
+static int netxen_netdev_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+{
+ struct netxen_adapter *adapter;
+ struct net_device *dev = (struct net_device *)ptr;
+ struct in_device *indev;
+
+recheck:
+ if (dev == NULL)
+ goto done;
+
+ if (dev->priv_flags & IFF_802_1Q_VLAN) {
+ dev = vlan_dev_real_dev(dev);
+ goto recheck;
+ }
+
+ if (!is_netxen_netdev(dev))
+ goto done;
+
+ adapter = netdev_priv(dev);
+
+ if (!adapter || !netxen_destip_supported(adapter))
+ goto done;
+
+ if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC)
+ goto done;
+
+ indev = in_dev_get(dev);
+ if (!indev)
+ goto done;
+
+ for_ifa(indev) {
+ switch (event) {
+ case NETDEV_UP:
+ netxen_config_ipaddr(adapter,
+ ifa->ifa_address, NX_IP_UP);
+ break;
+ case NETDEV_DOWN:
+ netxen_config_ipaddr(adapter,
+ ifa->ifa_address, NX_IP_DOWN);
+ break;
+ default:
+ break;
+ }
+ } endfor_ifa(indev);
+
+ in_dev_put(indev);
+done:
+ return NOTIFY_DONE;
+}
+
+static int
+netxen_inetaddr_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+{
+ struct netxen_adapter *adapter;
+ struct net_device *dev;
+
+ struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
+
+ dev = ifa->ifa_dev ? ifa->ifa_dev->dev : NULL;
+
+recheck:
+ if (dev == NULL || !netif_running(dev))
+ goto done;
+
+ if (dev->priv_flags & IFF_802_1Q_VLAN) {
+ dev = vlan_dev_real_dev(dev);
+ goto recheck;
+ }
+
+ if (!is_netxen_netdev(dev))
+ goto done;
+
+ adapter = netdev_priv(dev);
+
+ if (!adapter || !netxen_destip_supported(adapter))
+ goto done;
+
+ if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC)
+ goto done;
+
+ switch (event) {
+ case NETDEV_UP:
+ netxen_config_ipaddr(adapter, ifa->ifa_address, NX_IP_UP);
+ break;
+ case NETDEV_DOWN:
+ netxen_config_ipaddr(adapter, ifa->ifa_address, NX_IP_DOWN);
+ break;
+ default:
+ break;
+ }
+
+done:
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block netxen_netdev_cb = {
+ .notifier_call = netxen_netdev_event,
+};
+
+static struct notifier_block netxen_inetaddr_cb = {
+ .notifier_call = netxen_inetaddr_event,
+};
+
static struct pci_driver netxen_driver = {
.name = netxen_nic_driver_name,
.id_table = netxen_pci_tbl,
@@ -1800,6 +1920,9 @@
if ((netxen_workq = create_singlethread_workqueue("netxen")) == NULL)
return -ENOMEM;
+ register_netdevice_notifier(&netxen_netdev_cb);
+ register_inetaddr_notifier(&netxen_inetaddr_cb);
+
return pci_register_driver(&netxen_driver);
}
@@ -1808,6 +1931,9 @@
static void __exit netxen_exit_module(void)
{
pci_unregister_driver(&netxen_driver);
+
+ unregister_inetaddr_notifier(&netxen_inetaddr_cb);
+ unregister_netdevice_notifier(&netxen_netdev_cb);
destroy_workqueue(netxen_workq);
}