Commit 33dc362b authored by Yi Zou's avatar Yi Zou Committed by James Bottomley

[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: default avatarYi Zou <>
Signed-off-by: default avatarKiran Patil <>
Signed-off-by: default avatarRobert Love <>
Signed-off-by: default avatarJames Bottomley <>
parent 48058481
......@@ -266,8 +266,9 @@ int ft_write_pending(struct se_cmd *se_cmd)
cmd->sg_cnt =
if (cmd->sg && lport->tt.ddp_setup(lport, ep->xid,
cmd->sg, cmd->sg_cnt))
if (cmd->sg && lport->tt.ddp_target(lport, ep->xid,
cmd->was_ddp_setup = 1;
......@@ -510,6 +510,14 @@ struct libfc_function_template {
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.
int (*ddp_target)(struct fc_lport *, u16, struct scatterlist *,
unsigned int);
* Allow LLD to fill its own Link Error Status Block
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