Commit 16b1c4e0 authored by Jacky Chou's avatar Jacky Chou Committed by David S. Miller
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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: default avatarJacky Chou <jackychou@asix.com.tw>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 71812af7

drivers/net/usb/ax88179_178a.c

+11 −6
Original line number Diff line number Diff line
@@ -1377,11 +1377,12 @@ static int ax88179_bind(struct usbnet *dev, struct usb_interface *intf) 
	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 |
@@ -1526,17 +1527,19 @@ ax88179_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 
{

	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);
@@ -1547,6 +1550,8 @@ ax88179_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 
	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;

}