2020-09-13 07:34:37 +00:00
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From: MarkLee <Mark-MC.Lee@mediatek.com>
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Date: Wed, 13 Nov 2019 10:38:44 +0800
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Subject: [PATCH] net: ethernet: mediatek: Enable GDM GDMA_DROP_ALL mode
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Enable GDM GDMA_DROP_ALL mode to drop all packet during the
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stop operation. This is recommended by the mt762x HW design
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to drop all packet from GMAC before stopping PDMA.
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Signed-off-by: MarkLee <Mark-MC.Lee@mediatek.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
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+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
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2021-06-03 18:46:59 +00:00
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@@ -2331,6 +2331,8 @@ static int mtk_stop(struct net_device *d
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2020-09-13 07:34:37 +00:00
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if (!refcount_dec_and_test(ð->dma_refcnt))
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return 0;
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+ mtk_gdm_config(eth, MTK_GDMA_DROP_ALL);
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+
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mtk_tx_irq_disable(eth, MTK_TX_DONE_INT);
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mtk_rx_irq_disable(eth, MTK_RX_DONE_INT);
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napi_disable(ð->tx_napi);
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--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
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+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
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@@ -85,6 +85,7 @@
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#define MTK_GDMA_TCS_EN BIT(21)
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#define MTK_GDMA_UCS_EN BIT(20)
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#define MTK_GDMA_TO_PDMA 0x0
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+#define MTK_GDMA_DROP_ALL 0x7777
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/* Unicast Filter MAC Address Register - Low */
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#define MTK_GDMA_MAC_ADRL(x) (0x508 + (x * 0x1000))
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