ixgbe: Add support for the net_device_ops.ndo_fcoe_enable/disable to 82599

This adds support to the net_device_ops.ndo_fcoe_enable/disable for 82599. This
consequently allows us to dynamically turn FCoE offload feature on or off
upon incoming calls to ndo_fcoe_enable/disable. When this happens, FCoE offload
features are enabled/disabled accordingly, and this is regardless of whether
DCB being turned on or not.
Signed-off-by: Yi Zou <yi.zou@intel.com>
Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@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.h

@@ -450,6 +450,8 @@ extern int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter,
 extern int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid,
                               struct scatterlist *sgl, unsigned int sgc);
 extern int ixgbe_fcoe_ddp_put(struct net_device *netdev, u16 xid);
+extern int ixgbe_fcoe_enable(struct net_device *netdev);
+extern int ixgbe_fcoe_disable(struct net_device *netdev);
 #endif /* IXGBE_FCOE */
 
 #endif /* _IXGBE_H_ */

drivers/net/ixgbe/ixgbe_dcb_nl.c

@@ -139,23 +139,6 @@ static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
 			adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
 		}
 		adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
-#ifdef IXGBE_FCOE
-		/* Turn on FCoE offload */
-		if ((adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) &&
-		    (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))) {
-			adapter->flags |= IXGBE_FLAG_FCOE_ENABLED;
-			adapter->ring_feature[RING_F_FCOE].indices =
-				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);
-		}
-#endif /* IXGBE_FCOE */
 		ixgbe_init_interrupt_scheme(adapter);
 		if (netif_running(netdev))
 			netdev->netdev_ops->ndo_open(netdev);
@@ -174,22 +157,6 @@ static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
 			if (adapter->hw.mac.type == ixgbe_mac_82599EB)
 				adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
 
-#ifdef IXGBE_FCOE
-			/* Turn off FCoE offload */
-			if (adapter->flags & (IXGBE_FLAG_FCOE_CAPABLE |
-			     IXGBE_FLAG_FCOE_ENABLED)) {
-				adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
-				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);
-			}
-#endif /* IXGBE_FCOE */
 			ixgbe_init_interrupt_scheme(adapter);
 			if (netif_running(netdev))
 				netdev->netdev_ops->ndo_open(netdev);

drivers/net/ixgbe/ixgbe_fcoe.c

@@ -554,3 +554,97 @@ void ixgbe_cleanup_fcoe(struct ixgbe_adapter *adapter)
 		fcoe->pool = NULL;
 	}
 }
+
+/**
+ * ixgbe_fcoe_enable - turn on FCoE offload feature
+ * @netdev: the corresponding netdev
+ *
+ * Turns on FCoE offload feature in 82599.
+ *
+ * Returns : 0 indicates success or -EINVAL on failure
+ */
+int ixgbe_fcoe_enable(struct net_device *netdev)
+{
+	int rc = -EINVAL;
+	struct ixgbe_adapter *adapter = netdev_priv(netdev);
+
+
+	if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
+		goto out_enable;
+
+	if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
+		goto out_enable;
+
+	DPRINTK(DRV, INFO, "Enabling FCoE offload features.\n");
+	if (netif_running(netdev))
+		netdev->netdev_ops->ndo_stop(netdev);
+
+	ixgbe_clear_interrupt_scheme(adapter);
+
+	adapter->flags |= IXGBE_FLAG_FCOE_ENABLED;
+	adapter->ring_feature[RING_F_FCOE].indices = 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);
+
+	ixgbe_init_interrupt_scheme(adapter);
+
+	if (netif_running(netdev))
+		netdev->netdev_ops->ndo_open(netdev);
+	rc = 0;
+
+out_enable:
+	return rc;
+}
+
+/**
+ * ixgbe_fcoe_disable - turn off FCoE offload feature
+ * @netdev: the corresponding netdev
+ *
+ * Turns off FCoE offload feature in 82599.
+ *
+ * Returns : 0 indicates success or -EINVAL on failure
+ */
+int ixgbe_fcoe_disable(struct net_device *netdev)
+{
+	int rc = -EINVAL;
+	struct ixgbe_adapter *adapter = netdev_priv(netdev);
+
+	if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
+		goto out_disable;
+
+	if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
+		goto out_disable;
+
+	DPRINTK(DRV, INFO, "Disabling FCoE offload features.\n");
+	if (netif_running(netdev))
+		netdev->netdev_ops->ndo_stop(netdev);
+
+	ixgbe_clear_interrupt_scheme(adapter);
+
+	adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
+	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);
+
+	ixgbe_cleanup_fcoe(adapter);
+
+	ixgbe_init_interrupt_scheme(adapter);
+	if (netif_running(netdev))
+		netdev->netdev_ops->ndo_open(netdev);
+	rc = 0;
+
+out_disable:
+	return rc;
+}

drivers/net/ixgbe/ixgbe_main.c

@@ -5377,6 +5377,8 @@ static const struct net_device_ops ixgbe_netdev_ops = {
 #ifdef IXGBE_FCOE
 	.ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
 	.ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
+	.ndo_fcoe_enable = ixgbe_fcoe_enable,
+	.ndo_fcoe_disable = ixgbe_fcoe_disable,
 #endif /* IXGBE_FCOE */
 };