From 9507f517ac4080627515c31c937f45a4a58ccbe4 Mon Sep 17 00:00:00 2001 From: Alex Marginean Date: Fri, 14 Feb 2020 17:28:26 +0000 Subject: [PATCH] LF-924: net/enetc: Set MAC Rx FIFO to recommended value On LS1028A the MAC Rx FIFO defaults to value 2, which is too high and may lead to Rx lock-up under traffic. Set it to 1 instead, as recommended by the hardware team. Signed-off-by: Alex Marginean Reviewed-by: Claudiu Manoil Acked-by: Jason Liu --- drivers/net/ethernet/freescale/enetc/enetc_hw.h | 2 ++ drivers/net/ethernet/freescale/enetc/enetc_pf.c | 6 ++++++ 2 files changed, 8 insertions(+) --- a/drivers/net/ethernet/freescale/enetc/enetc_hw.h +++ b/drivers/net/ethernet/freescale/enetc/enetc_hw.h @@ -226,6 +226,8 @@ enum enetc_bdr_type {TX, RX}; #define ENETC_PM0_MAXFRM 0x8014 #define ENETC_SET_TX_MTU(val) ((val) << 16) #define ENETC_SET_MAXFRM(val) ((val) & 0xffff) +#define ENETC_PM0_RX_FIFO 0x801c +#define ENETC_PM0_RX_FIFO_VAL 1 #define ENETC_PM_IMDIO_BASE 0x8030 /* PCS registers */ --- a/drivers/net/ethernet/freescale/enetc/enetc_pf.c +++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.c @@ -536,6 +536,12 @@ static void enetc_configure_port_mac(str enetc_port_wr(hw, ENETC_PM0_IF_MODE, ENETC_PM0_IFM_XGMII); enetc_port_wr(hw, ENETC_PM1_IF_MODE, ENETC_PM0_IFM_XGMII); } + + /* on LS1028A the MAC Rx FIFO defaults to value 2, which is too high and + * may lead to Rx lock-up under traffic. Set it to 1 instead, as + * recommended by the hardware team. + */ + enetc_port_wr(hw, ENETC_PM0_RX_FIFO, ENETC_PM0_RX_FIFO_VAL); } static void enetc_configure_port_pmac(struct enetc_hw *hw)