[Intel-wired-lan] [PATCH 3/3] i40e: Add UDP segmentation offload support
Samudrala, Sridhar
sridhar.samudrala at intel.com
Thu Oct 10 00:39:19 UTC 2019
On 10/9/2019 3:06 PM, Josh Hunt wrote:
> Based on a series from Alexander Duyck this change adds UDP segmentation
> offload support to the i40e driver.
>
> CC: Alexander Duyck <alexander.h.duyck at intel.com>
> CC: Willem de Bruijn <willemb at google.com>
> Signed-off-by: Josh Hunt <johunt at akamai.com>
> ---
> 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(-)
>
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
> index 6031223eafab..56f8c52cbba1 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
> @@ -12911,6 +12911,7 @@ 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 |
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
> index e3f29dc8b290..0b32f04a6255 100644
> --- 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_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->csum_offset == offsetof(struct tcphdr, check)) {
Isn't it more relevant to check for gso_type rather than base this on
the csum_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;
> + } else {
> + csum_replace_by_diff(&l4.udp->check, (__force __wsum)htonl(paylen));
> + /* compute length of segmentation header */
> + *hdr_len = sizeof(*l4.udp) + l4_offset;
> + }
>
> /* pull values out of skb_shinfo */
> gso_size = skb_shinfo(skb)->gso_size;
>
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