1 From 16b1c4e01c89ba07367461e0bc4cb84993c2d027 Mon Sep 17 00:00:00 2001
2 From: Jacky Chou <jackychou@asix.com.tw>
3 Date: Mon, 15 Nov 2021 11:49:41 +0800
4 Subject: [PATCH] net: usb: ax88179_178a: add TSO feature
6 On low-effciency embedded platforms, transmission performance is poor
7 due to on Bulk-out with single packet.
8 Adding TSO feature improves the transmission performance and reduces
9 the number of interrupt caused by Bulk-out complete.
11 Reference to module, net: usb: aqc111.
13 Signed-off-by: Jacky Chou <jackychou@asix.com.tw>
14 Signed-off-by: David S. Miller <davem@davemloft.net>
16 drivers/net/usb/ax88179_178a.c | 17 +++++++++++------
17 1 file changed, 11 insertions(+), 6 deletions(-)
19 --- a/drivers/net/usb/ax88179_178a.c
20 +++ b/drivers/net/usb/ax88179_178a.c
21 @@ -1377,11 +1377,12 @@ static int ax88179_bind(struct usbnet *d
22 dev->mii.phy_id = 0x03;
23 dev->mii.supports_gmii = 1;
25 - dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
27 + dev->net->features |= NETIF_F_SG | NETIF_F_IP_CSUM |
28 + NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM | NETIF_F_TSO;
30 - dev->net->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
32 + dev->net->hw_features |= dev->net->features;
34 + netif_set_gso_max_size(dev->net, 16384);
36 /* Enable checksum offload */
37 *tmp = AX_RXCOE_IP | AX_RXCOE_TCP | AX_RXCOE_UDP |
38 @@ -1587,17 +1588,19 @@ ax88179_tx_fixup(struct usbnet *dev, str
41 int frame_size = dev->maxpacket;
42 - int mss = skb_shinfo(skb)->gso_size;
48 + tx_hdr2 = skb_shinfo(skb)->gso_size; /* Set TSO mss */
49 if (((skb->len + 8) % frame_size) == 0)
50 tx_hdr2 |= 0x80008000; /* Enable padding */
52 headroom = skb_headroom(skb) - 8;
54 + if ((dev->net->features & NETIF_F_SG) && skb_linearize(skb))
57 if ((skb_header_cloned(skb) || headroom < 0) &&
58 pskb_expand_head(skb, headroom < 0 ? 8 : 0, 0, GFP_ATOMIC)) {
59 dev_kfree_skb_any(skb);
60 @@ -1608,6 +1611,8 @@ ax88179_tx_fixup(struct usbnet *dev, str
61 put_unaligned_le32(tx_hdr1, ptr);
62 put_unaligned_le32(tx_hdr2, ptr + 4);
64 + usbnet_set_skb_tx_stats(skb, (skb_shinfo(skb)->gso_segs ?: 1), 0);