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: Yi Zou <yi.zou@intel.com> Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -386,6 +386,13 @@ extern void ixgbe_configure_fcoe(struct ixgbe_adapter *adapter);
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extern int ixgbe_fso(struct ixgbe_adapter *adapter,
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struct ixgbe_ring *tx_ring, struct sk_buff *skb,
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u32 tx_flags, u8 *hdr_len);
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extern void ixgbe_cleanup_fcoe(struct ixgbe_adapter *adapter);
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extern int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter,
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union ixgbe_adv_rx_desc *rx_desc,
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struct sk_buff *skb);
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extern int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid,
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struct scatterlist *sgl, unsigned int sgc);
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extern int ixgbe_fcoe_ddp_put(struct net_device *netdev, u16 xid);
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#endif /* IXGBE_FCOE */
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#endif /* _IXGBE_H_ */
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@ -784,6 +784,12 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
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total_rx_packets++;
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skb->protocol = eth_type_trans(skb, adapter->netdev);
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#ifdef IXGBE_FCOE
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/* if ddp, not passing to ULD unless for FCP_RSP or error */
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if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
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if (!ixgbe_fcoe_ddp(adapter, rx_desc, skb))
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goto next_desc;
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#endif /* IXGBE_FCOE */
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ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
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next_desc:
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@ -4822,6 +4828,10 @@ static const struct net_device_ops ixgbe_netdev_ops = {
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#ifdef CONFIG_NET_POLL_CONTROLLER
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.ndo_poll_controller = ixgbe_netpoll,
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#endif
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#ifdef IXGBE_FCOE
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.ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
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.ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
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#endif /* IXGBE_FCOE */
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};
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/**
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@ -5036,6 +5046,7 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
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if (!(device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)) {
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netdev->features |= NETIF_F_FCOE_CRC;
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netdev->features |= NETIF_F_FSO;
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netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX - 1;
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} else {
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adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
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}
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@ -5205,6 +5216,11 @@ static void __devexit ixgbe_remove(struct pci_dev *pdev)
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}
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#endif
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#ifdef IXGBE_FCOE
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if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
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ixgbe_cleanup_fcoe(adapter);
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#endif /* IXGBE_FCOE */
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if (netdev->reg_state == NETREG_REGISTERED)
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unregister_netdev(netdev);
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