net: ethernet: mtk_eth_soc: increase DMA ring sizes

256 descriptors is not enough for multi-gigabit traffic under load on
MT7622. Bump it to 512 to improve performance.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
index 83883d86b88186b123647711b66bce1fc7889007..540a5771b7bf16880bb2b202b8a1c9c6a81e3edd 100644 (file)
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -22,7 +22,7 @@
 #define MTK_MAX_RX_LENGTH      1536
 #define MTK_MAX_RX_LENGTH_2K   2048
 #define MTK_TX_DMA_BUF_LEN     0x3fff
-#define MTK_DMA_SIZE           256
+#define MTK_DMA_SIZE           512
 #define MTK_NAPI_WEIGHT                64
 #define MTK_MAC_COUNT          2
 #define MTK_RX_ETH_HLEN                (ETH_HLEN + ETH_FCS_LEN)