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ice: Support UDP segmentation offload

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Based on the work done by Alex Duyck on other Intel drivers, add code to
support UDP segmentation offload (USO) for the ice driver.

Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Brett Creeley 2019-12-12 03:12:53 -08:00 committed by Jeff Kirsher
parent 3c85efb8f1
commit a54e3b8cff
2 changed files with 14 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/ethernet/intel/ice/ice_main.c
View File

@ -2330,7 +2330,8 @@ static void ice_set_netdev_features(struct net_device *netdev)
NETIF_F_HW_VLAN_CTAG_TX |
NETIF_F_HW_VLAN_CTAG_RX;
tso_features = NETIF_F_TSO;
tso_features = NETIF_F_TSO |
NETIF_F_GSO_UDP_L4;
/* set features that user can change */
netdev->hw_features = dflt_features | csumo_features |

15
drivers/net/ethernet/intel/ice/ice_txrx.c
View File

@ -1925,6 +1925,7 @@ int ice_tso(struct ice_tx_buf *first, struct ice_tx_offload_params *off)
} ip;
union {
struct tcphdr *tcp;
struct udphdr *udp;
unsigned char *hdr;
} l4;
u64 cd_mss, cd_tso_len;
@ -1958,10 +1959,18 @@ int ice_tso(struct ice_tx_buf *first, struct ice_tx_offload_params *off)
/* remove payload length from checksum */
paylen = skb->len - l4_start;
csum_replace_by_diff(&l4.tcp->check, (__force __wsum)htonl(paylen));
/* compute length of segmentation header */
off->header_len = (l4.tcp->doff * 4) + l4_start;
if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) {
csum_replace_by_diff(&l4.udp->check,
(__force __wsum)htonl(paylen));
/* compute length of UDP segmentation header */
off->header_len = sizeof(l4.udp) + l4_start;
} else {
csum_replace_by_diff(&l4.tcp->check,
(__force __wsum)htonl(paylen));
/* compute length of TCP segmentation header */
off->header_len = (l4.tcp->doff * 4) + l4_start;
}
/* update gso_segs and bytecount */
first->gso_segs = skb_shinfo(skb)->gso_segs;