|
| 1 | +From 16b1c4e01c89ba07367461e0bc4cb84993c2d027 Mon Sep 17 00:00:00 2001 |
| 2 | +From: Jacky Chou < [email protected]> |
| 3 | +Date: Mon, 15 Nov 2021 11:49:41 +0800 |
| 4 | +Subject: [PATCH] net: usb: ax88179_178a: add TSO feature |
| 5 | + |
| 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. |
| 10 | + |
| 11 | +Reference to module, net: usb: aqc111. |
| 12 | + |
| 13 | +Signed-off-by: Jacky Chou < [email protected]> |
| 14 | +Signed-off-by: David S. Miller < [email protected]> |
| 15 | +--- |
| 16 | + drivers/net/usb/ax88179_178a.c | 17 +++++++++++------ |
| 17 | + 1 file changed, 11 insertions(+), 6 deletions(-) |
| 18 | + |
| 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; |
| 24 | + |
| 25 | +- dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | |
| 26 | +- NETIF_F_RXCSUM; |
| 27 | ++ dev->net->features |= NETIF_F_SG | NETIF_F_IP_CSUM | |
| 28 | ++ NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM | NETIF_F_TSO; |
| 29 | + |
| 30 | +- dev->net->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | |
| 31 | +- NETIF_F_RXCSUM; |
| 32 | ++ dev->net->hw_features |= dev->net->features; |
| 33 | ++ |
| 34 | ++ netif_set_gso_max_size(dev->net, 16384); |
| 35 | + |
| 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 |
| 39 | + { |
| 40 | + u32 tx_hdr1, tx_hdr2; |
| 41 | + int frame_size = dev->maxpacket; |
| 42 | +- int mss = skb_shinfo(skb)->gso_size; |
| 43 | + int headroom; |
| 44 | + void *ptr; |
| 45 | + |
| 46 | + tx_hdr1 = skb->len; |
| 47 | +- tx_hdr2 = mss; |
| 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 */ |
| 51 | + |
| 52 | + headroom = skb_headroom(skb) - 8; |
| 53 | + |
| 54 | ++ if ((dev->net->features & NETIF_F_SG) && skb_linearize(skb)) |
| 55 | ++ return NULL; |
| 56 | ++ |
| 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); |
| 63 | + |
| 64 | ++ usbnet_set_skb_tx_stats(skb, (skb_shinfo(skb)->gso_segs ?: 1), 0); |
| 65 | ++ |
| 66 | + return skb; |
| 67 | + } |
| 68 | + |
0 commit comments