target/linux/generic/pending-5.10/770-05-net-ethernet-mtk_eth_soc-increase-DMA-ring-sizes.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Wed, 26 Aug 2020 16:59:41 +0200
   3 Subject: [PATCH] net: ethernet: mtk_eth_soc: increase DMA ring sizes
   4
   5 256 descriptors is not enough for multi-gigabit traffic under load on MT7622.
   6 Bump it to 512 to improve performance
   7
   8 Signed-off-by: Felix Fietkau <nbd@nbd.name>
   9 ---
  10
  11 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
  12 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
  13 @@ -21,7 +21,7 @@
  14  #define MTK_QDMA_PAGE_SIZE     2048
  15  #define        MTK_MAX_RX_LENGTH       1536
  16  #define MTK_TX_DMA_BUF_LEN     0x3fff
  17 -#define MTK_DMA_SIZE           256
  18 +#define MTK_DMA_SIZE           512
  19  #define MTK_NAPI_WEIGHT                64
  20  #define MTK_MAC_COUNT          2
  21  #define MTK_RX_ETH_HLEN                (VLAN_ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN)