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bca663f20f
Performance comparison (iperf3, mtu 1500): Before: 53.9 Mbps After: 87.9 Mbps The tests were performed on a BT Home Hub 5A router. The iperf3 server was running on the router, the client on the host. Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
69 lines
2.2 KiB
Diff
69 lines
2.2 KiB
Diff
From 16b1c4e01c89ba07367461e0bc4cb84993c2d027 Mon Sep 17 00:00:00 2001
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From: Jacky Chou <jackychou@asix.com.tw>
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Date: Mon, 15 Nov 2021 11:49:41 +0800
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Subject: [PATCH] net: usb: ax88179_178a: add TSO feature
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On low-effciency embedded platforms, transmission performance is poor
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due to on Bulk-out with single packet.
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Adding TSO feature improves the transmission performance and reduces
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the number of interrupt caused by Bulk-out complete.
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Reference to module, net: usb: aqc111.
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Signed-off-by: Jacky Chou <jackychou@asix.com.tw>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/usb/ax88179_178a.c | 17 +++++++++++------
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1 file changed, 11 insertions(+), 6 deletions(-)
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--- a/drivers/net/usb/ax88179_178a.c
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+++ b/drivers/net/usb/ax88179_178a.c
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@@ -1377,11 +1377,12 @@ static int ax88179_bind(struct usbnet *d
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dev->mii.phy_id = 0x03;
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dev->mii.supports_gmii = 1;
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- dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
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- NETIF_F_RXCSUM;
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+ dev->net->features |= NETIF_F_SG | NETIF_F_IP_CSUM |
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+ NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM | NETIF_F_TSO;
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- dev->net->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
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- NETIF_F_RXCSUM;
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+ dev->net->hw_features |= dev->net->features;
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+
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+ netif_set_gso_max_size(dev->net, 16384);
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/* Enable checksum offload */
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*tmp = AX_RXCOE_IP | AX_RXCOE_TCP | AX_RXCOE_UDP |
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@@ -1587,17 +1588,19 @@ ax88179_tx_fixup(struct usbnet *dev, str
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{
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u32 tx_hdr1, tx_hdr2;
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int frame_size = dev->maxpacket;
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- int mss = skb_shinfo(skb)->gso_size;
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int headroom;
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void *ptr;
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tx_hdr1 = skb->len;
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- tx_hdr2 = mss;
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+ tx_hdr2 = skb_shinfo(skb)->gso_size; /* Set TSO mss */
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if (((skb->len + 8) % frame_size) == 0)
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tx_hdr2 |= 0x80008000; /* Enable padding */
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headroom = skb_headroom(skb) - 8;
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+ if ((dev->net->features & NETIF_F_SG) && skb_linearize(skb))
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+ return NULL;
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+
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if ((skb_header_cloned(skb) || headroom < 0) &&
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pskb_expand_head(skb, headroom < 0 ? 8 : 0, 0, GFP_ATOMIC)) {
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dev_kfree_skb_any(skb);
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@@ -1608,6 +1611,8 @@ ax88179_tx_fixup(struct usbnet *dev, str
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put_unaligned_le32(tx_hdr1, ptr);
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put_unaligned_le32(tx_hdr2, ptr + 4);
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+ usbnet_set_skb_tx_stats(skb, (skb_shinfo(skb)->gso_segs ?: 1), 0);
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+
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return skb;
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}
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