[SCSI] libfc, tcm_fc: add ddp_targ() to libfc function template to supprot FCoE DDP in target mode
The fcoe driver can implement ddp_targ() similarly to ddp_setup() when fcoe
stack works with existing target frame, e.g., tcm, where the ddp_targ() would
eventually point to the underlying hardware driver's implementation of
ndo_fcoe_ddp_targ() through net_device_ops. This new API sets up DDP context
for target appropriately by setting required bits for DDP context.
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/include/scsi/libfc.h b/include/scsi/libfc.h
index a3cbda4..7d96829 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -511,6 +511,14 @@
*/
int (*ddp_done)(struct fc_lport *, u16);
/*
+ * Sets up the DDP context for a given exchange id on the given
+ * scatterlist if LLD supports DDP for FCoE target.
+ *
+ * STATUS: OPTIONAL
+ */
+ int (*ddp_target)(struct fc_lport *, u16, struct scatterlist *,
+ unsigned int);
+ /*
* Allow LLD to fill its own Link Error Status Block
*
* STATUS: OPTIONAL