From 16b1c4e01c89ba07367461e0bc4cb84993c2d027 Mon Sep 17 00:00:00 2001 From: Jacky Chou 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 Signed-off-by: David S. Miller --- 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 @@ -1333,11 +1333,12 @@ 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); ax88179_reset(dev); @@ -1502,17 +1503,19 @@ 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); @@ -1523,6 +1526,8 @@ 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; }