ixgbe: Add support for netdev_ops.ndo_fcoe_get_wwn to 82599

Implements the netdev_ops.ndo_fcoe_get_wwn in 82599 if it finds valid
prefix for the World Wide Node Name (WWNN) or World Wide Port Name (WWPN),
as well as valid SAN MAC address.

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>

3 files changed, 48 insertions, 0 deletions

diff --git a/drivers/net/ixgbe/ixgbe.h b/drivers/net/ixgbe/ixgbe.h
index 2b854161c61b..7eb08a6d3f99 100644
--- a/drivers/net/ixgbe/ixgbe.h
+++ b/drivers/net/ixgbe/ixgbe.h
@@ -457,6 +457,7 @@ extern int ixgbe_fcoe_disable(struct net_device *netdev);
 extern u8 ixgbe_fcoe_getapp(struct ixgbe_adapter *adapter);
 extern u8 ixgbe_fcoe_setapp(struct ixgbe_adapter *adapter, u8 up);
 #endif /* CONFIG_IXGBE_DCB */
+extern int ixgbe_fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type);
 #endif /* IXGBE_FCOE */
 
 #endif /* _IXGBE_H_ */
diff --git a/drivers/net/ixgbe/ixgbe_fcoe.c b/drivers/net/ixgbe/ixgbe_fcoe.c
index a3c9f99515e2..edecdc853c14 100644
--- a/drivers/net/ixgbe/ixgbe_fcoe.c
+++ b/drivers/net/ixgbe/ixgbe_fcoe.c
@@ -718,3 +718,49 @@ u8 ixgbe_fcoe_setapp(struct ixgbe_adapter *adapter, u8 up)
         return 1;
 }
 #endif /* CONFIG_IXGBE_DCB */
+
+/**
+ * ixgbe_fcoe_get_wwn - get world wide name for the node or the port
+ * @netdev : ixgbe adapter
+ * @wwn : the world wide name
+ * @type: the type of world wide name
+ *
+ * Returns the node or port world wide name if both the prefix and the san
+ * mac address are valid, then the wwn is formed based on the NAA-2 for
+ * IEEE Extended name identifier (ref. to T10 FC-LS Spec., Sec. 15.3).
+ *
+ * Returns : 0 on success
+ */
+int ixgbe_fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type)
+{
+        int rc = -EINVAL;
+        u16 prefix = 0xffff;
+        struct ixgbe_adapter *adapter = netdev_priv(netdev);
+        struct ixgbe_mac_info *mac = &adapter->hw.mac;
+
+        switch (type) {
+        case NETDEV_FCOE_WWNN:
+                prefix = mac->wwnn_prefix;
+                break;
+        case NETDEV_FCOE_WWPN:
+                prefix = mac->wwpn_prefix;
+                break;
+        default:
+                break;
+        }
+
+        if ((prefix != 0xffff) &&
+            is_valid_ether_addr(mac->san_addr)) {
+                *wwn = ((u64) prefix << 48) |
+                       ((u64) mac->san_addr[0] << 40) |
+                       ((u64) mac->san_addr[1] << 32) |
+                       ((u64) mac->san_addr[2] << 24) |
+                       ((u64) mac->san_addr[3] << 16) |
+                       ((u64) mac->san_addr[4] << 8)  |
+                       ((u64) mac->san_addr[5]);
+                rc = 0;
+        }
+        return rc;
+}
+
+
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 4c8a44919705..45c5faf0824a 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -5449,6 +5449,7 @@ static const struct net_device_ops ixgbe_netdev_ops = {
         .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
         .ndo_fcoe_enable = ixgbe_fcoe_enable,
         .ndo_fcoe_disable = ixgbe_fcoe_disable,
+        .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
 #endif /* IXGBE_FCOE */
 };