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i40e: Add UDP segmentation offload support

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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: Josh Hunt <johunt@akamai.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Josh Hunt 2019-10-11 12:53:40 -04:00 committed by Jeff Kirsher
parent c74d4bdbae
commit 3fd8ed5639
2 changed files with 10 additions and 3 deletions
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1
drivers/net/ethernet/intel/i40e/i40e_main.c
View File

@ -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 |

12
drivers/net/ethernet/intel/i40e/i40e_txrx.c
View File

@ -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));
/* 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 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;