| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 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 |
| 4 | |
| 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. |
| 8 | |
| 9 | Signed-off-by: MarkLee <Mark-MC.Lee@mediatek.com> |
| 10 | Signed-off-by: David S. Miller <davem@davemloft.net> |
| 11 | --- |
| 12 | |
| 13 | --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c |
| 14 | +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c |
| 15 | @@ -2351,6 +2351,8 @@ static int mtk_stop(struct net_device *d |
| 16 | if (!refcount_dec_and_test(ð->dma_refcnt)) |
| 17 | return 0; |
| 18 | |
| 19 | + mtk_gdm_config(eth, MTK_GDMA_DROP_ALL); |
| 20 | + |
| 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 |
| 26 | @@ -85,6 +85,7 @@ |
| 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 |
| 31 | |
| 32 | /* Unicast Filter MAC Address Register - Low */ |
| 33 | #define MTK_GDMA_MAC_ADRL(x) (0x508 + (x * 0x1000)) |