liquidio: implement vlan filter enable and disable

Add implementation to support ethtool -K ethX rx-vlan-filter on/off.
Rename OCTNET_CMD_ENABLE_VLAN_FILTER command to OCTNET_CMD_VLAN_FILTER_CTL
and add OCTNET_CMD_VLAN_FILTER_ENABLE and OCTNET_CMD_VLAN_FILTER_DISABLE
parameters so that it can be used to enable or disable the filter.

Signed-off-by: Prasad Kanneganti <prasad.kanneganti@cavium.com>
Signed-off-by: Derek Chickles <derek.chickles@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/cavium/liquidio/lio_main.c b/drivers/net/ethernet/cavium/liquidio/lio_main.c
index ba01242..17f963b 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_main.c
@@ -3591,6 +3591,10 @@ static netdev_features_t liquidio_fix_features(struct net_device *netdev,
 	    (lio->dev_capability & NETIF_F_LRO))
 		request &= ~NETIF_F_LRO;
 
+	if ((request & NETIF_F_HW_VLAN_CTAG_FILTER) &&
+	    !(lio->dev_capability & NETIF_F_HW_VLAN_CTAG_FILTER))
+		request &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
+
 	return request;
 }
 
@@ -3603,14 +3607,14 @@ static int liquidio_set_features(struct net_device *netdev,
 {
 	struct lio *lio = netdev_priv(netdev);
 
-	if (!((netdev->features ^ features) & NETIF_F_LRO))
-		return 0;
-
-	if ((features & NETIF_F_LRO) && (lio->dev_capability & NETIF_F_LRO))
+	if ((features & NETIF_F_LRO) &&
+	    (lio->dev_capability & NETIF_F_LRO) &&
+	    !(netdev->features & NETIF_F_LRO))
 		liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
 				     OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
 	else if (!(features & NETIF_F_LRO) &&
-		 (lio->dev_capability & NETIF_F_LRO))
+		 (lio->dev_capability & NETIF_F_LRO) &&
+		 (netdev->features & NETIF_F_LRO))
 		liquidio_set_feature(netdev, OCTNET_CMD_LRO_DISABLE,
 				     OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
 
@@ -3629,6 +3633,17 @@ static int liquidio_set_features(struct net_device *netdev,
 		liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
 					    OCTNET_CMD_RXCSUM_DISABLE);
 
+	if ((features & NETIF_F_HW_VLAN_CTAG_FILTER) &&
+	    (lio->dev_capability & NETIF_F_HW_VLAN_CTAG_FILTER) &&
+	    !(netdev->features & NETIF_F_HW_VLAN_CTAG_FILTER))
+		liquidio_set_feature(netdev, OCTNET_CMD_VLAN_FILTER_CTL,
+				     OCTNET_CMD_VLAN_FILTER_ENABLE);
+	else if (!(features & NETIF_F_HW_VLAN_CTAG_FILTER) &&
+		 (lio->dev_capability & NETIF_F_HW_VLAN_CTAG_FILTER) &&
+		 (netdev->features & NETIF_F_HW_VLAN_CTAG_FILTER))
+		liquidio_set_feature(netdev, OCTNET_CMD_VLAN_FILTER_CTL,
+				     OCTNET_CMD_VLAN_FILTER_DISABLE);
+
 	return 0;
 }
 
@@ -4199,7 +4214,8 @@ static int setup_nic_devices(struct octeon_device *octeon_dev)
 			liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
 					     OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
 
-		liquidio_set_feature(netdev, OCTNET_CMD_ENABLE_VLAN_FILTER, 0);
+		liquidio_set_feature(netdev, OCTNET_CMD_VLAN_FILTER_CTL,
+				     OCTNET_CMD_VLAN_FILTER_ENABLE);
 
 		if ((debug != -1) && (debug & NETIF_MSG_HW))
 			liquidio_set_feature(netdev,