[SCSI] fcoe: support ndo_fcoe_ddp_target() for DDP in FCoE targe

Add ddp_target() support to the Open-FCoE sw fcoe hba driver (fcoe.ko).

Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: Kiran Patil <kiran.patil@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 155d7b9bdeae656409250182c8fb9e97788c6a60..f76a321ecb151263589087b5b312f9d4534729c7 100644 (file)
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -99,7 +99,8 @@ static void fcoe_destroy_work(struct work_struct *);
 static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
                          unsigned int);
 static int fcoe_ddp_done(struct fc_lport *, u16);
-
+static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,
+                          unsigned int);
 static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *);
 
 static bool fcoe_match(struct net_device *netdev);
@@ -143,6 +144,7 @@ static struct libfc_function_template fcoe_libfc_fcn_templ = {
        .frame_send = fcoe_xmit,
        .ddp_setup = fcoe_ddp_setup,
        .ddp_done = fcoe_ddp_done,
+       .ddp_target = fcoe_ddp_target,
        .elsct_send = fcoe_elsct_send,
        .get_lesb = fcoe_get_lesb,
        .lport_set_port_id = fcoe_set_port_id,
@@ -886,6 +888,28 @@ static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
        return 0;
 }
 
+/**
+ * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
+ * @lport: The local port to setup DDP for
+ * @xid:   The exchange ID for this DDP transfer
+ * @sgl:   The scatterlist describing this transfer
+ * @sgc:   The number of sg items
+ *
+ * Returns: 0 if the DDP context was not configured
+ */
+static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
+                          struct scatterlist *sgl, unsigned int sgc)
+{
+       struct net_device *netdev = fcoe_netdev(lport);
+
+       if (netdev->netdev_ops->ndo_fcoe_ddp_target)
+               return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
+                                                              sgl, sgc);
+
+       return 0;
+}
+
+
 /**
  * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
  * @lport: The local port to complete DDP on