ixgbe: Add support for NETIF_F_FCOE_MTU to 82599 devices

Enable netdev feature flag bit NETIF_F_FCOE_MTU for 82599 devices and enable
jumbo frame correspondingly when NETIF_F_FCOE_MTU is set.
Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ixgbe/ixgbe_dcb_nl.c

@@ -148,8 +148,10 @@ static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
 				IXGBE_FCRETA_SIZE;
 			netdev->features |= NETIF_F_FCOE_CRC;
 			netdev->features |= NETIF_F_FSO;
+			netdev->features |= NETIF_F_FCOE_MTU;
 			netdev->vlan_features |= NETIF_F_FCOE_CRC;
 			netdev->vlan_features |= NETIF_F_FSO;
+			netdev->vlan_features |= NETIF_F_FCOE_MTU;
 			netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX - 1;
 			netdev_features_change(netdev);
 		}
@@ -180,8 +182,10 @@ static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
 				adapter->ring_feature[RING_F_FCOE].indices = 0;
 				netdev->features &= ~NETIF_F_FCOE_CRC;
 				netdev->features &= ~NETIF_F_FSO;
+				netdev->features &= ~NETIF_F_FCOE_MTU;
 				netdev->vlan_features &= ~NETIF_F_FCOE_CRC;
 				netdev->vlan_features &= ~NETIF_F_FSO;
+				netdev->vlan_features &= ~NETIF_F_FCOE_MTU;
 				netdev->fcoe_ddp_xid = 0;
 				netdev_features_change(netdev);
 			}

drivers/net/ixgbe/ixgbe_main.c

@@ -2026,7 +2026,7 @@ static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
 	else
 		hlreg0 |= IXGBE_HLREG0_JUMBOEN;
 #ifdef IXGBE_FCOE
-	if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
+	if (netdev->features & NETIF_F_FCOE_MTU)
 		hlreg0 |= IXGBE_HLREG0_JUMBOEN;
 #endif
 	IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
@@ -2057,7 +2057,7 @@ static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
 			rx_ring->flags |= IXGBE_RING_RX_PS_ENABLED;
 
 #ifdef IXGBE_FCOE
-		if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
+		if (netdev->features & NETIF_F_FCOE_MTU) {
 			struct ixgbe_ring_feature *f;
 			f = &adapter->ring_feature[RING_F_FCOE];
 			if ((i >= f->mask) && (i < f->mask + f->indices)) {
@@ -2609,7 +2609,7 @@ static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
 
 #ifdef IXGBE_FCOE
 	/* adjust max frame to be able to do baby jumbo for FCoE */
-	if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
+	if ((netdev->features & NETIF_F_FCOE_MTU) &&
 	    (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
 		max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;