[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>

1 files changed, 25 insertions, 1 deletions

diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 155d7b9bdeae..f76a321ecb15 100644
--- 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,
@@ -887,6 +889,28 @@ static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
 }
 
 /**
+ * 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
  * @xid:   The exchange ID for this DDP transfer