net: add proper documentation for previously added net_device_ops for FCoE

Add proper documentation for previously added net_device_ops ops for FCoE.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 7a07153..604dbf5 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -777,6 +777,42 @@ struct netdev_tc_txq {
  *     queues stopped. This allows the netdevice to perform queue management
  *     safely.
  *
+ *     Fiber Channel over Ethernet (FCoE) offload functions.
+ * int (*ndo_fcoe_enable)(struct net_device *dev);
+ *     Called when the FCoE protocol stack wants to start using LLD for FCoE
+ *     so the underlying device can perform whatever needed configuration or
+ *     initialization to support acceleration of FCoE traffic.
+ *
+ * int (*ndo_fcoe_disable)(struct net_device *dev);
+ *     Called when the FCoE protocol stack wants to stop using LLD for FCoE
+ *     so the underlying device can perform whatever needed clean-ups to
+ *     stop supporting acceleration of FCoE traffic.
+ *
+ * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
+ *                          struct scatterlist *sgl, unsigned int sgc);
+ *     Called when the FCoE Initiator wants to initialize an I/O that
+ *     is a possible candidate for Direct Data Placement (DDP). The LLD can
+ *     perform necessary setup and returns 1 to indicate the device is set up
+ *     successfully to perform DDP on this I/O, otherwise this returns 0.
+ *
+ * int (*ndo_fcoe_ddp_done)(struct net_device *dev,  u16 xid);
+ *     Called when the FCoE Initiator/Target is done with the DDPed I/O as
+ *     indicated by the FC exchange id 'xid', so the underlying device can
+ *     clean up and reuse resources for later DDP requests.
+ *
+ * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
+ *                           struct scatterlist *sgl, unsigned int sgc);
+ *     Called when the FCoE Target wants to initialize an I/O that
+ *     is a possible candidate for Direct Data Placement (DDP). The LLD can
+ *     perform necessary setup and returns 1 to indicate the device is set up
+ *     successfully to perform DDP on this I/O, otherwise this returns 0.
+ *
+ * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
+ *     Called when the underlying device wants to override default World Wide
+ *     Name (WWN) generation mechanism in FCoE protocol stack to pass its own
+ *     World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
+ *     protocol stack to use.
+ *
  *     RFS acceleration.
  * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
  *                         u16 rxq_index, u32 flow_id);