Messages in this thread Patch in this message | | | From | Felix Fietkau <> | Subject | [PATCH net-next 2/6] net: ethernet: mtk_eth_soc: drop packets to WDMA if the ring is full | Date | Wed, 16 Nov 2022 09:07:30 +0100 |
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Improves handling of DMA ring overflow. Clarify other WDMA drop related comment.
Signed-off-by: Felix Fietkau <nbd@nbd.name> --- drivers/net/ethernet/mediatek/mtk_eth_soc.c | 5 ++++- drivers/net/ethernet/mediatek/mtk_eth_soc.h | 1 + 2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index a9a6b53b4286..fbfc23923bf5 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -3393,9 +3393,12 @@ static int mtk_hw_init(struct mtk_eth *eth) mtk_w32(eth, 0x21021000, MTK_FE_INT_GRP); if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) { - /* PSE should not drop port8 and port9 packets */ + /* PSE should not drop port8 and port9 packets from WDMA Tx */ mtk_w32(eth, 0x00000300, PSE_DROP_CFG); + /* PSE should drop packets to port 8/9 on WDMA Rx ring full */ + mtk_w32(eth, 0x00000300, PSE_PPE0_DROP); + /* PSE Free Queue Flow Control */ mtk_w32(eth, 0x01fa01f4, PSE_FQFC_CFG2); diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h index 72d3bfc2323d..eaaa0c67ef2a 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h @@ -127,6 +127,7 @@ #define PSE_FQFC_CFG1 0x100 #define PSE_FQFC_CFG2 0x104 #define PSE_DROP_CFG 0x108 +#define PSE_PPE0_DROP 0x110 /* PSE Input Queue Reservation Register*/ #define PSE_IQ_REV(x) (0x140 + (((x) - 1) << 2)) -- 2.38.1
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