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net: ethernet: mediatek: Enable GDM GDMA_DROP_ALL mode 

Enable GDM GDMA_DROP_ALL mode to drop all packet during the
stop operation. This is recommended by the mt762x HW design
to drop all packet from GMAC before stopping PDMA.

Signed-off-by: MarkLee <Mark-MC.Lee@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
MarkLee 2019-11-13 10:38:44 +08:00 committed by David S. Miller
parent 5ac9eda060
commit 8d66a8183d
2 changed files with 3 additions and 0 deletions
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2
drivers/net/ethernet/mediatek/mtk_eth_soc.c
View File

@ -2279,6 +2279,8 @@ static int mtk_stop(struct net_device *dev)
if (!refcount_dec_and_test(&eth->dma_refcnt))
return 0;
mtk_gdm_config(eth, MTK_GDMA_DROP_ALL);
mtk_tx_irq_disable(eth, MTK_TX_DONE_INT);
mtk_rx_irq_disable(eth, MTK_RX_DONE_INT);
napi_disable(&eth->tx_napi);

1
drivers/net/ethernet/mediatek/mtk_eth_soc.h
View File

@ -85,6 +85,7 @@
#define MTK_GDMA_TCS_EN BIT(21)
#define MTK_GDMA_UCS_EN BIT(20)
#define MTK_GDMA_TO_PDMA 0x0
#define MTK_GDMA_DROP_ALL 0x7777
/* Unicast Filter MAC Address Register - Low */
#define MTK_GDMA_MAC_ADRL(x) (0x508 + (x * 0x1000))