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- From 16b1c4e01c89ba07367461e0bc4cb84993c2d027 Mon Sep 17 00:00:00 2001
- From: Jacky Chou <[email protected]>
- Date: Mon, 15 Nov 2021 11:49:41 +0800
- Subject: [PATCH] net: usb: ax88179_178a: add TSO feature
- On low-effciency embedded platforms, transmission performance is poor
- due to on Bulk-out with single packet.
- Adding TSO feature improves the transmission performance and reduces
- the number of interrupt caused by Bulk-out complete.
- Reference to module, net: usb: aqc111.
- Signed-off-by: Jacky Chou <[email protected]>
- Signed-off-by: David S. Miller <[email protected]>
- ---
- drivers/net/usb/ax88179_178a.c | 17 +++++++++++------
- 1 file changed, 11 insertions(+), 6 deletions(-)
- --- a/drivers/net/usb/ax88179_178a.c
- +++ b/drivers/net/usb/ax88179_178a.c
- @@ -1363,11 +1363,12 @@ static int ax88179_bind(struct usbnet *d
- dev->mii.phy_id = 0x03;
- dev->mii.supports_gmii = 1;
-
- - dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
- - NETIF_F_RXCSUM;
- + dev->net->features |= NETIF_F_SG | NETIF_F_IP_CSUM |
- + NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM | NETIF_F_TSO;
-
- - dev->net->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
- - NETIF_F_RXCSUM;
- + dev->net->hw_features |= dev->net->features;
- +
- + netif_set_gso_max_size(dev->net, 16384);
-
- /* Enable checksum offload */
- *tmp = AX_RXCOE_IP | AX_RXCOE_TCP | AX_RXCOE_UDP |
- @@ -1573,17 +1574,19 @@ ax88179_tx_fixup(struct usbnet *dev, str
- {
- u32 tx_hdr1, tx_hdr2;
- int frame_size = dev->maxpacket;
- - int mss = skb_shinfo(skb)->gso_size;
- int headroom;
- void *ptr;
-
- tx_hdr1 = skb->len;
- - tx_hdr2 = mss;
- + tx_hdr2 = skb_shinfo(skb)->gso_size; /* Set TSO mss */
- if (((skb->len + 8) % frame_size) == 0)
- tx_hdr2 |= 0x80008000; /* Enable padding */
-
- headroom = skb_headroom(skb) - 8;
-
- + if ((dev->net->features & NETIF_F_SG) && skb_linearize(skb))
- + return NULL;
- +
- if ((skb_header_cloned(skb) || headroom < 0) &&
- pskb_expand_head(skb, headroom < 0 ? 8 : 0, 0, GFP_ATOMIC)) {
- dev_kfree_skb_any(skb);
- @@ -1594,6 +1597,8 @@ ax88179_tx_fixup(struct usbnet *dev, str
- put_unaligned_le32(tx_hdr1, ptr);
- put_unaligned_le32(tx_hdr2, ptr + 4);
-
- + usbnet_set_skb_tx_stats(skb, (skb_shinfo(skb)->gso_segs ?: 1), 0);
- +
- return skb;
- }
-
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