target/linux/generic/backport-5.10/797-v5.17-net-usb-ax88179_178a-add-TSO-feature.patch

   1 From 16b1c4e01c89ba07367461e0bc4cb84993c2d027 Mon Sep 17 00:00:00 2001
   2 From: Jacky Chou <jackychou@asix.com.tw>
   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 <jackychou@asix.com.tw>
  14 Signed-off-by: David S. Miller <davem@davemloft.net>
  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