target/linux/generic/pending-5.4/770-14-net-ethernet-mtk_eth_soc-set-PPE-flow-hash-as-skb-ha.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Sun, 13 Sep 2020 08:27:24 +0200
   3 Subject: [PATCH] net: ethernet: mtk_eth_soc: set PPE flow hash as skb hash
   4  if present
   5
   6 This improves GRO performance
   7
   8 Signed-off-by: Felix Fietkau <nbd@nbd.name>
   9 ---
  10
  11 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  12 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  13 @@ -19,6 +19,7 @@
  14  #include <linux/interrupt.h>
  15  #include <linux/pinctrl/devinfo.h>
  16  #include <linux/phylink.h>
  17 +#include <linux/jhash.h>
  18  #include <net/dsa.h>
  19
  20  #include "mtk_eth_soc.h"
  21 @@ -1267,6 +1268,7 @@ static int mtk_poll_rx(struct napi_struc
  22                 struct net_device *netdev;
  23                 unsigned int pktlen;
  24                 dma_addr_t dma_addr;
  25 +               u32 hash;
  26                 int mac;
  27
  28                 ring = mtk_get_rx_ring(eth);
  29 @@ -1336,6 +1338,12 @@ static int mtk_poll_rx(struct napi_struc
  30                 skb->protocol = eth_type_trans(skb, netdev);
  31                 bytes += pktlen;
  32
  33 +               hash = trxd.rxd4 & GENMASK(13, 0);
  34 +               if (hash != GENMASK(13, 0)) {
  35 +                       hash = jhash_1word(hash, 0);
  36 +                       skb_set_hash(skb, hash, PKT_HASH_TYPE_L4);
  37 +               }
  38 +
  39                 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX &&
  40                     (trxd.rxd2 & RX_DMA_VTAG))
  41                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),