From: Josh Hunt <johunt@akamai.com>
Date: Fri, 11 Oct 2019 12:53:40 -0400
Subject: i40e: Add UDP segmentation offload support
Patch-mainline: v5.5-rc1
Git-commit: 3fd8ed5639589846baec0dc0ab312cdf709094f0
References: jsc#SLE-8025
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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/intel/i40e/i40e_main.c | 1 +
drivers/net/ethernet/intel/i40e/i40e_txrx.c | 12 +++++++++---
2 files changed, 10 insertions(+), 3 deletions(-)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -12931,6 +12931,7 @@ static int i40e_config_netdev(struct i40
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 |
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -2960,10 +2960,16 @@ static int i40e_tso(struct i40e_tx_buffe
/* 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;