From: Felix Fietkau nbd@nbd.name
[ Upstream commit f4b2fa2c25e1ade78f766aa82e733a0b5198d484 ]
Improves handling of DMA ring overflow. Clarify other WDMA drop related comment.
Signed-off-by: Felix Fietkau nbd@nbd.name Link: https://lore.kernel.org/r/20221116080734.44013-3-nbd@nbd.name Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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 4c16f2df566f..559c7a42c1c9 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -3344,9 +3344,12 @@ 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 da261dd49d6f..df8e6e95254e 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h @@ -121,6 +121,7 @@ #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))