Commit 3fd8ed56 authored by Josh Hunt's avatar Josh Hunt Committed by Jeff Kirsher
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i40e: Add UDP segmentation offload support 



Based on a series from Alexander Duyck this change adds UDP segmentation
offload support to the i40e driver.

CC: Alexander Duyck <alexander.h.duyck@intel.com>
CC: Willem de Bruijn <willemb@google.com>
Signed-off-by: default avatarJosh Hunt <johunt@akamai.com>
Tested-by: default avatarAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent c74d4bdb

drivers/net/ethernet/intel/i40e/i40e_main.c

+1 −0
Original line number Diff line number Diff line
@@ -12931,6 +12931,7 @@ static int i40e_config_netdev(struct i40e_vsi *vsi) 
			  NETIF_F_GSO_IPXIP6		|

			  NETIF_F_GSO_UDP_TUNNEL	|

			  NETIF_F_GSO_UDP_TUNNEL_CSUM	|

			  NETIF_F_GSO_UDP_L4		|

			  NETIF_F_SCTP_CRC		|

			  NETIF_F_RXHASH		|

			  NETIF_F_RXCSUM		|

drivers/net/ethernet/intel/i40e/i40e_txrx.c

+9 −3
Original line number Diff line number Diff line
@@ -2960,10 +2960,16 @@ static int i40e_tso(struct i40e_tx_buffer *first, u8 *hdr_len, 


	/* remove payload length from inner checksum */

	paylen = skb->len - l4_offset;

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



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

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

		/* compute length of segmentation header */

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

	} else {

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

		/* compute length of segmentation header */

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

	}



	/* pull values out of skb_shinfo */

	gso_size = skb_shinfo(skb)->gso_size;

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