Commit a54e3b8c authored by Brett Creeley's avatar Brett Creeley Committed by Jeff Kirsher
Browse files

ice: Support UDP segmentation offload 



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: default avatarBrett Creeley <brett.creeley@intel.com>
Signed-off-by: default avatarTony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: default avatarAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 3c85efb8

drivers/net/ethernet/intel/ice/ice_main.c

+2 −1
Original line number Diff line number Diff line
@@ -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 |

drivers/net/ethernet/intel/ice/ice_txrx.c

+12 −3
Original line number Diff line number Diff line
@@ -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 */

	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;

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