1 From: MarkLee <Mark-MC.Lee@mediatek.com>
2 Date: Wed, 13 Nov 2019 10:38:44 +0800
3 Subject: [PATCH] net: ethernet: mediatek: Enable GDM GDMA_DROP_ALL mode
5 Enable GDM GDMA_DROP_ALL mode to drop all packet during the
6 stop operation. This is recommended by the mt762x HW design
7 to drop all packet from GMAC before stopping PDMA.
9 Signed-off-by: MarkLee <Mark-MC.Lee@mediatek.com>
10 Signed-off-by: David S. Miller <davem@davemloft.net>
13 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
14 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
15 @@ -2331,6 +2331,8 @@ static int mtk_stop(struct net_device *d
16 if (!refcount_dec_and_test(ð->dma_refcnt))
19 + mtk_gdm_config(eth, MTK_GDMA_DROP_ALL);
21 mtk_tx_irq_disable(eth, MTK_TX_DONE_INT);
22 mtk_rx_irq_disable(eth, MTK_RX_DONE_INT);
23 napi_disable(ð->tx_napi);
24 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
25 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
27 #define MTK_GDMA_TCS_EN BIT(21)
28 #define MTK_GDMA_UCS_EN BIT(20)
29 #define MTK_GDMA_TO_PDMA 0x0
30 +#define MTK_GDMA_DROP_ALL 0x7777
32 /* Unicast Filter MAC Address Register - Low */
33 #define MTK_GDMA_MAC_ADRL(x) (0x508 + (x * 0x1000))