target/linux/generic/backport-5.10/610-v5.13-50-net-ethernet-mtk_eth_soc-set-PPE-flow-hash-as-skb-ha.patch

   1 From fa817272c37ef78e25dc14e4760ac78a7043a18a Mon Sep 17 00:00:00 2001
   2 From: Felix Fietkau <nbd@nbd.name>
   3 Date: Thu, 22 Apr 2021 22:21:07 -0700
   4 Subject: [PATCH] net: ethernet: mtk_eth_soc: set PPE flow hash as skb hash if
   5  present
   6
   7 This improves GRO performance
   8
   9 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  10 [Ilya: Use MTK_RXD4_FOE_ENTRY instead of GENMASK(13, 0)]
  11 Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
  12 Signed-off-by: David S. Miller <davem@davemloft.net>
  13 ---
  14  drivers/net/ethernet/mediatek/mtk_eth_soc.c | 8 ++++++++
  15  1 file changed, 8 insertions(+)
  16
  17 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  18 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  19 @@ -19,6 +19,7 @@
  20  #include <linux/interrupt.h>
  21  #include <linux/pinctrl/devinfo.h>
  22  #include <linux/phylink.h>
  23 +#include <linux/jhash.h>
  24  #include <net/dsa.h>
  25
  26  #include "mtk_eth_soc.h"
  27 @@ -1283,6 +1284,7 @@ static int mtk_poll_rx(struct napi_struc
  28                 struct net_device *netdev;
  29                 unsigned int pktlen;
  30                 dma_addr_t dma_addr;
  31 +               u32 hash;
  32                 int mac;
  33
  34                 ring = mtk_get_rx_ring(eth);
  35 @@ -1355,6 +1357,12 @@ static int mtk_poll_rx(struct napi_struc
  36                 skb->protocol = eth_type_trans(skb, netdev);
  37                 bytes += pktlen;
  38
  39 +               hash = trxd.rxd4 & MTK_RXD4_FOE_ENTRY;
  40 +               if (hash != MTK_RXD4_FOE_ENTRY) {
  41 +                       hash = jhash_1word(hash, 0);
  42 +                       skb_set_hash(skb, hash, PKT_HASH_TYPE_L4);
  43 +               }
  44 +
  45                 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX &&
  46                     (trxd.rxd2 & RX_DMA_VTAG))
  47                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),