target/linux/generic/backport-5.10/610-v5.13-44-net-ethernet-mtk_eth_soc-increase-DMA-ring-sizes.patch

   1 From 6b4423b258b91032c50a5efca15d3d9bb194ea1d Mon Sep 17 00:00:00 2001
   2 From: Felix Fietkau <nbd@nbd.name>
   3 Date: Thu, 22 Apr 2021 22:21:01 -0700
   4 Subject: [PATCH] net: ethernet: mtk_eth_soc: increase DMA ring sizes
   5
   6 256 descriptors is not enough for multi-gigabit traffic under load on
   7 MT7622. Bump it to 512 to improve performance.
   8
   9 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  10 Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
  11 Signed-off-by: David S. Miller <davem@davemloft.net>
  12 ---
  13  drivers/net/ethernet/mediatek/mtk_eth_soc.h | 2 +-
  14  1 file changed, 1 insertion(+), 1 deletion(-)
  15
  16 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
  17 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
  18 @@ -21,7 +21,7 @@
  19  #define MTK_QDMA_PAGE_SIZE     2048
  20  #define        MTK_MAX_RX_LENGTH       1536
  21  #define MTK_TX_DMA_BUF_LEN     0x3fff
  22 -#define MTK_DMA_SIZE           256
  23 +#define MTK_DMA_SIZE           512
  24  #define MTK_NAPI_WEIGHT                64
  25  #define MTK_MAC_COUNT          2
  26  #define MTK_RX_ETH_HLEN                (VLAN_ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN)