[PATCH] S2io: VLAN support

Hi,
Patch below adds VLAN support to the driver.

Signed-off-by: Ravinandan Arakali <ravinandan.arakali@neterion.com>
Signed-off-by: Raghavendra Koushik <raghavendra.koushik@neterion.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

2 files changed, 59 insertions, 2 deletions

diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c
index ee498d248d38..db3e394c740b 100644
--- a/drivers/net/s2io.c
+++ b/drivers/net/s2io.c
@@ -55,6 +55,7 @@
 #include <linux/ethtool.h>
 #include <linux/version.h>
 #include <linux/workqueue.h>
+#include <linux/if_vlan.h>
 
 #include <asm/system.h>
 #include <asm/uaccess.h>
@@ -174,6 +175,30 @@ static char ethtool_stats_keys[][ETH_GSTRING_LEN] = {
                         timer.data = (unsigned long) arg;       \
                         mod_timer(&timer, (jiffies + exp))      \
 
+/* Add the vlan */
+static void s2io_vlan_rx_register(struct net_device *dev,
+                                        struct vlan_group *grp)
+{
+        nic_t *nic = dev->priv;
+        unsigned long flags;
+
+        spin_lock_irqsave(&nic->tx_lock, flags);
+        nic->vlgrp = grp;
+        spin_unlock_irqrestore(&nic->tx_lock, flags);
+}
+
+/* Unregister the vlan */
+static void s2io_vlan_rx_kill_vid(struct net_device *dev, unsigned long vid)
+{
+        nic_t *nic = dev->priv;
+        unsigned long flags;
+
+        spin_lock_irqsave(&nic->tx_lock, flags);
+        if (nic->vlgrp)
+                nic->vlgrp->vlan_devices[vid] = NULL;
+        spin_unlock_irqrestore(&nic->tx_lock, flags);
+}
+
 /*
  * Constants to be programmed into the Xena's registers, to configure
  * the XAUI.
@@ -2803,6 +2828,8 @@ int s2io_xmit(struct sk_buff *skb, struct net_device *dev)
 #ifdef NETIF_F_TSO
         int mss;
 #endif
+        u16 vlan_tag = 0;
+        int vlan_priority = 0;
         mac_info_t *mac_control;
         struct config_param *config;
 
@@ -2821,6 +2848,13 @@ int s2io_xmit(struct sk_buff *skb, struct net_device *dev)
 
         queue = 0;
 
+        /* Get Fifo number to Transmit based on vlan priority */
+        if (sp->vlgrp && vlan_tx_tag_present(skb)) {
+                vlan_tag = vlan_tx_tag_get(skb);
+                vlan_priority = vlan_tag >> 13;
+                queue = config->fifo_mapping[vlan_priority];
+        }
+
         put_off = (u16) mac_control->fifos[queue].tx_curr_put_info.offset;
         get_off = (u16) mac_control->fifos[queue].tx_curr_get_info.offset;
         txdp = (TxD_t *) mac_control->fifos[queue].list_info[put_off].
@@ -2857,6 +2891,11 @@ int s2io_xmit(struct sk_buff *skb, struct net_device *dev)
 
         txdp->Control_2 |= config->tx_intr_type;
 
+        if (sp->vlgrp && vlan_tx_tag_present(skb)) {
+                txdp->Control_2 |= TXD_VLAN_ENABLE;
+                txdp->Control_2 |= TXD_VLAN_TAG(vlan_tag);
+        }
+
         txdp->Control_1 |= (TXD_BUFFER0_SIZE(frg_len) |
                             TXD_GATHER_CODE_FIRST);
         txdp->Control_1 |= TXD_LIST_OWN_XENA;
@@ -4653,10 +4692,23 @@ static int rx_osm_handler(ring_info_t *ring_data, RxD_t * rxdp)
 
         skb->protocol = eth_type_trans(skb, dev);
 #ifdef CONFIG_S2IO_NAPI
-        netif_receive_skb(skb);
+        if (sp->vlgrp && RXD_GET_VLAN_TAG(rxdp->Control_2)) {
+                /* Queueing the vlan frame to the upper layer */
+                vlan_hwaccel_receive_skb(skb, sp->vlgrp,
+                        RXD_GET_VLAN_TAG(rxdp->Control_2));
+        } else {
+                netif_receive_skb(skb);
+        }
 #else
-        netif_rx(skb);
+        if (sp->vlgrp && RXD_GET_VLAN_TAG(rxdp->Control_2)) {
+                /* Queueing the vlan frame to the upper layer */
+                vlan_hwaccel_rx(skb, sp->vlgrp,
+                        RXD_GET_VLAN_TAG(rxdp->Control_2));
+        } else {
+                netif_rx(skb);
+        }
 #endif
+
         dev->last_rx = jiffies;
         atomic_dec(&sp->rx_bufs_left[ring_no]);
         return SUCCESS;
@@ -4954,6 +5006,9 @@ s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre)
         dev->do_ioctl = &s2io_ioctl;
         dev->change_mtu = &s2io_change_mtu;
         SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
+        dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
+        dev->vlan_rx_register = s2io_vlan_rx_register;
+        dev->vlan_rx_kill_vid = (void *)s2io_vlan_rx_kill_vid;
 
         /*
          * will use eth_mac_addr() for  dev->set_mac_address
diff --git a/drivers/net/s2io.h b/drivers/net/s2io.h
index 263fe7a1b903..b924ef21814a 100644
--- a/drivers/net/s2io.h
+++ b/drivers/net/s2io.h
@@ -689,6 +689,8 @@ struct s2io_nic {
 #define CARD_UP 2
         atomic_t card_state;
         volatile unsigned long link_state;
+        struct vlan_group *vlgrp;
+
         spinlock_t      rx_lock;
         atomic_t        isr_cnt;
 };