diff mbox

[net-next,3/3] ixgbe: Add support for using FCoE DDP in 82599 as FCoE targets

Message ID 20090904005630.14869.67340.stgit@localhost.localdomain
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Kirsher, Jeffrey T Sept. 4, 2009, 12:56 a.m. UTC 
From: Yi Zou <yi.zou@intel.com>

The FCoE DDP in 82599 can be used for both FCoE initiator as well as FCoE
target, depending on the indication of the exchange being the responder or
originator in the F_CTL (frame control) field in the encapsulated Fiber
Channel frame header (T10 Spec., FC-FS). For the initiator, OX_ID is used
for FCoE DDP, where for the target RX_ID is used for FCoE DDP.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

 drivers/net/ixgbe/ixgbe_fcoe.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)


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Comments

David Miller Sept. 4, 2009, 3:09 a.m. UTC | #1 
From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Thu, 03 Sep 2009 17:56:31 -0700

> From: Yi Zou <yi.zou@intel.com>
> 
> The FCoE DDP in 82599 can be used for both FCoE initiator as well as FCoE
> target, depending on the indication of the exchange being the responder or
> originator in the F_CTL (frame control) field in the encapsulated Fiber
> Channel frame header (T10 Spec., FC-FS). For the initiator, OX_ID is used
> for FCoE DDP, where for the target RX_ID is used for FCoE DDP.
> 
> Signed-off-by: Yi Zou <yi.zou@intel.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Applied.
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diff mbox

Patch

diff --git a/drivers/net/ixgbe/ixgbe_fcoe.c b/drivers/net/ixgbe/ixgbe_fcoe.c
index 0607cff..a3c9f99 100644
--- a/drivers/net/ixgbe/ixgbe_fcoe.c
+++ b/drivers/net/ixgbe/ixgbe_fcoe.c
@@ -292,6 +292,7 @@  int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter,
 		   struct sk_buff *skb)
 {
 	u16 xid;
+	u32 fctl;
 	u32 sterr, fceofe, fcerr, fcstat;
 	int rc = -EINVAL;
 	struct ixgbe_fcoe *fcoe;
@@ -312,7 +313,12 @@  int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter,
 	skb_set_transport_header(skb, skb_network_offset(skb) +
 				 sizeof(struct fcoe_hdr));
 	fh = (struct fc_frame_header *)skb_transport_header(skb);
-	xid =  be16_to_cpu(fh->fh_ox_id);
+	fctl = ntoh24(fh->fh_f_ctl);
+	if (fctl & FC_FC_EX_CTX)
+		xid =  be16_to_cpu(fh->fh_ox_id);
+	else
+		xid =  be16_to_cpu(fh->fh_rx_id);
+
 	if (xid >= IXGBE_FCOE_DDP_MAX)
 		goto ddp_out;