[SCSI] fcoe: add support to FCoE offload support in fcoe_sw through net_device

This adds implementation of ddp_setup()/ddp_done() in fcoe_sw for its
fcoe_sw_libfc_fcn_templ.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

diff --git a/drivers/scsi/fcoe/fcoe_sw.c b/drivers/scsi/fcoe/fcoe_sw.c
index d99217d05104f987ef66d1ec6b2ced897f0f4a77..2bbbe3c0cc7babe410e61ed85043755528af6431 100644 (file)
--- a/drivers/scsi/fcoe/fcoe_sw.c
+++ b/drivers/scsi/fcoe/fcoe_sw.c
@@ -373,8 +373,46 @@ static int fcoe_sw_destroy(struct net_device *netdev)
        return 0;
 }
 
+/*
+ * fcoe_sw_ddp_setup - calls LLD's ddp_setup through net_device
+ * @lp:        the corresponding fc_lport
+ * @xid: the exchange id for this ddp transfer
+ * @sgl: the scatterlist describing this transfer
+ * @sgc: number of sg items
+ *
+ * Returns : 0 no ddp
+ */
+static int fcoe_sw_ddp_setup(struct fc_lport *lp, u16 xid,
+                            struct scatterlist *sgl, unsigned int sgc)
+{
+       struct net_device *n = fcoe_netdev(lp);
+
+       if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_setup)
+               return n->netdev_ops->ndo_fcoe_ddp_setup(n, xid, sgl, sgc);
+
+       return 0;
+}
+
+/*
+ * fcoe_sw_ddp_done - calls LLD's ddp_done through net_device
+ * @lp:        the corresponding fc_lport
+ * @xid: the exchange id for this ddp transfer
+ *
+ * Returns : the length of data that have been completed by ddp
+ */
+static int fcoe_sw_ddp_done(struct fc_lport *lp, u16 xid)
+{
+       struct net_device *n = fcoe_netdev(lp);
+
+       if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_done)
+               return n->netdev_ops->ndo_fcoe_ddp_done(n, xid);
+       return 0;
+}
+
 static struct libfc_function_template fcoe_sw_libfc_fcn_templ = {
        .frame_send = fcoe_xmit,
+       .ddp_setup = fcoe_sw_ddp_setup,
+       .ddp_done = fcoe_sw_ddp_done,
 };
 
 /**