From: "Samudrala, Sridhar" <sridhar.samudrala@intel.com>
To: Josh Hunt <johunt@akamai.com>,
netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org,
jeffrey.t.kirsher@intel.com
Cc: willemb@google.com, aaron.f.brown@intel.com,
alexander.h.duyck@linux.intel.com,
Alexander Duyck <alexander.h.duyck@intel.com>
Subject: Re: [PATCH v3 3/3] i40e: Add UDP segmentation offload support
Date: Fri, 11 Oct 2019 10:39:45 -0700 [thread overview]
Message-ID: <db84a310-950a-f7e9-0d92-f7c81e27eb61@intel.com> (raw)
In-Reply-To: <1570812820-20052-4-git-send-email-johunt@akamai.com>
On 10/11/2019 9:53 AM, 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@intel.com>
> CC: Willem de Bruijn <willemb@google.com>
> Signed-off-by: Josh Hunt <johunt@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..b8496037ef7f 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_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;
> + }
Is it guaranteed that gso_type can be either UDP or TCP only if we reach
here? Don't we need to handle the case where it is neither and return
from this function?
>
> /* pull values out of skb_shinfo */
> gso_size = skb_shinfo(skb)->gso_size;
>
next prev parent reply other threads:[~2019-10-11 17:39 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-11 16:53 [PATCH v3 0/3] igb, ixgbe, i40e UDP segmentation offload support Josh Hunt
2019-10-11 16:53 ` [PATCH v3 1/3] igb: Add " Josh Hunt
2019-10-25 3:26 ` Brown, Aaron F
2019-10-11 16:53 ` [PATCH v3 2/3] ixgbe: " Josh Hunt
2019-10-16 16:43 ` [Intel-wired-lan] " Bowers, AndrewX
2019-10-18 18:04 ` Josh Hunt
2019-10-11 16:53 ` [PATCH v3 3/3] i40e: " Josh Hunt
2019-10-11 17:39 ` Samudrala, Sridhar [this message]
2019-10-11 17:56 ` Alexander Duyck
2019-10-11 18:59 ` Samudrala, Sridhar
2019-10-16 16:44 ` [Intel-wired-lan] " Bowers, AndrewX
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