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 <[email protected]> Signed-off-by: David S. Miller <[email protected]>
torvalds · Nov 14, 2019 · 8d66a81 · 8d66a81
1 parent 5ac9eda
commit 8d66a81
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diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -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);

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -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))