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>

1 files changed, 94 insertions, 0 deletions

diff --git a/drivers/net/ixgbe/ixgbe_fcoe.c b/drivers/net/ixgbe/ixgbe_fcoe.c
index 28cf104e36cc..26fe46fb13fb 100644
--- a/drivers/net/ixgbe/ixgbe_fcoe.c
+++ b/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;
+}