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Subject[PATCH net-next 3/7] net: hns3: add UDP segmentation offload support
Date
Add support for UDP segmentation offload to the HNS3 driver
when the device can do it.

Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
---
drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 20 +++++++++++++++++---
1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index df52abb..a362516 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -696,12 +696,19 @@ static int hns3_set_tso(struct sk_buff *skb, u32 *paylen,

/* normal or tunnel packet */
l4_offset = l4.hdr - skb->data;
- hdr_len = (l4.tcp->doff << 2) + l4_offset;

/* remove payload length from inner pseudo checksum when tso */
l4_paylen = skb->len - l4_offset;
- csum_replace_by_diff(&l4.tcp->check,
- (__force __wsum)htonl(l4_paylen));
+
+ if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) {
+ hdr_len = sizeof(*l4.udp) + l4_offset;
+ csum_replace_by_diff(&l4.udp->check,
+ (__force __wsum)htonl(l4_paylen));
+ } else {
+ hdr_len = (l4.tcp->doff << 2) + l4_offset;
+ csum_replace_by_diff(&l4.tcp->check,
+ (__force __wsum)htonl(l4_paylen));
+ }

/* find the txbd field values */
*paylen = skb->len - hdr_len;
@@ -2311,6 +2318,13 @@ static void hns3_set_default_feature(struct net_device *netdev)
netdev->features |= NETIF_F_NTUPLE;
}
}
+
+ if (test_bit(HNAE3_DEV_SUPPORT_UDP_GSO_B, ae_dev->caps)) {
+ netdev->hw_features |= NETIF_F_GSO_UDP_L4;
+ netdev->features |= NETIF_F_GSO_UDP_L4;
+ netdev->vlan_features |= NETIF_F_GSO_UDP_L4;
+ netdev->hw_enc_features |= NETIF_F_GSO_UDP_L4;
+ }
}

static int hns3_alloc_buffer(struct hns3_enet_ring *ring,
--
2.7.4
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