Commit c91a4f9f authored by Brett Creeley's avatar Brett Creeley Committed by Tony Nguyen
Browse files

iavf: add support for UDP Segmentation Offload 



Add code to support UDP segmentation offload (USO) for
hardware that supports it.

Suggested-by: default avatarJesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: default avatarBrett Creeley <brett.creeley@intel.com>
Tested-by: default avatarKonrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: default avatarTony Nguyen <anthony.l.nguyen@intel.com>
parent 142da08c

drivers/net/ethernet/intel/iavf/iavf_main.c

+2 −0
Original line number Diff line number Diff line
@@ -3542,6 +3542,8 @@ int iavf_process_config(struct iavf_adapter *adapter) 
	/* Enable cloud filter if ADQ is supported */

	if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ)

		hw_features |= NETIF_F_HW_TC;

	if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_USO)

		hw_features |= NETIF_F_GSO_UDP_L4;



	netdev->hw_features |= hw_features;

drivers/net/ethernet/intel/iavf/iavf_txrx.c

+11 −4
Original line number Diff line number Diff line
@@ -1905,13 +1905,20 @@ static int iavf_tso(struct iavf_tx_buffer *first, u8 *hdr_len, 


	/* determine offset of inner transport header */

	l4_offset = l4.hdr - skb->data;



	/* remove payload length from inner checksum */

	paylen = skb->len - l4_offset;

	csum_replace_by_diff(&l4.tcp->check, (__force __wsum)htonl(paylen));



	/* compute length of segmentation header */

	*hdr_len = (l4.tcp->doff * 4) + l4_offset;

	if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) {

		csum_replace_by_diff(&l4.udp->check,

				     (__force __wsum)htonl(paylen));

		/* compute length of UDP segmentation header */

		*hdr_len = (u8)sizeof(l4.udp) + l4_offset;

	} else {

		csum_replace_by_diff(&l4.tcp->check,

				     (__force __wsum)htonl(paylen));

		/* compute length of TCP segmentation header */

		*hdr_len = (u8)((l4.tcp->doff * 4) + l4_offset);

	}



	/* pull values out of skb_shinfo */

	gso_size = skb_shinfo(skb)->gso_size;

drivers/net/ethernet/intel/iavf/iavf_virtchnl.c

+1 −0
Original line number Diff line number Diff line
@@ -140,6 +140,7 @@ int iavf_send_vf_config_msg(struct iavf_adapter *adapter) 
	       VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM |

	       VIRTCHNL_VF_OFFLOAD_REQ_QUEUES |

	       VIRTCHNL_VF_OFFLOAD_ADQ |

	       VIRTCHNL_VF_OFFLOAD_USO |

	       VIRTCHNL_VF_OFFLOAD_FDIR_PF |

	       VIRTCHNL_VF_CAP_ADV_LINK_SPEED;