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Commit 332d4a7d authored by Yi Zou's avatar Yi Zou Committed by David S. Miller
Browse files

ixgbe: Implement FCoE Rx side large receive offload feature to 82599 



This patch implements the FCoE Rx side offload feature in ixgbe_main.c
to 82599 using the Rx offload infrastructure code added in the previous
patch. The large receive offload by Direct Data Placement (DDP) for
FCoE is achieved by implementing the ndo_fcoe_ddp_setup and ndo_fcoe_ddp_done
in net_device_ops via netdev. It is up to the ULD, i.e., fcoe and libfc
to query and setup large receive offload accordingly through the corresponding
netdev upon creating fcoe instances.

Signed-off-by: default avatarYi Zou <yi.zou@intel.com>
Acked-by: default avatarPeter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d0ed8937

drivers/net/ixgbe/ixgbe.h

+7 −0
Original line number Diff line number Diff line
@@ -386,6 +386,13 @@ extern void ixgbe_configure_fcoe(struct ixgbe_adapter *adapter); 
extern int ixgbe_fso(struct ixgbe_adapter *adapter,

                     struct ixgbe_ring *tx_ring, struct sk_buff *skb,

                     u32 tx_flags, u8 *hdr_len);

extern void ixgbe_cleanup_fcoe(struct ixgbe_adapter *adapter);

extern int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter,

                          union ixgbe_adv_rx_desc *rx_desc,

                          struct sk_buff *skb);

extern int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid,

                              struct scatterlist *sgl, unsigned int sgc);

extern int ixgbe_fcoe_ddp_put(struct net_device *netdev, u16 xid);

#endif /* IXGBE_FCOE */



#endif /* _IXGBE_H_ */

drivers/net/ixgbe/ixgbe_main.c

+16 −0
Original line number Diff line number Diff line
@@ -784,6 +784,12 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector, 
		total_rx_packets++;



		skb->protocol = eth_type_trans(skb, adapter->netdev);

#ifdef IXGBE_FCOE

		/* if ddp, not passing to ULD unless for FCP_RSP or error */

		if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)

			if (!ixgbe_fcoe_ddp(adapter, rx_desc, skb))

				goto next_desc;

#endif /* IXGBE_FCOE */

		ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);



next_desc:
@@ -4822,6 +4828,10 @@ static const struct net_device_ops ixgbe_netdev_ops = { 
#ifdef CONFIG_NET_POLL_CONTROLLER

	.ndo_poll_controller	= ixgbe_netpoll,

#endif

#ifdef IXGBE_FCOE

	.ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,

	.ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,

#endif /* IXGBE_FCOE */

};



/**
@@ -5036,6 +5046,7 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev, 
			if (!(device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)) {

				netdev->features |= NETIF_F_FCOE_CRC;

				netdev->features |= NETIF_F_FSO;

				netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX - 1;

			} else {

				adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;

			}
@@ -5205,6 +5216,11 @@ static void __devexit ixgbe_remove(struct pci_dev *pdev) 
	}



#endif

#ifdef IXGBE_FCOE

	if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)

		ixgbe_cleanup_fcoe(adapter);



#endif /* IXGBE_FCOE */

	if (netdev->reg_state == NETREG_REGISTERED)

		unregister_netdev(netdev);