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net: enetc: set MAC RX FIFO to recommended value

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[ Upstream commit 1b2395dfff5bb40228a187f21f577cd90673d344 ]

On LS1028A, the MAC RX FIFO defaults to the value 2, which is too high
and may lead to RX lock-up under traffic at a rate higher than 6 Gbps.
Set it to 1 instead, as recommended by the hardware design team and by
later versions of the ENETC block guide.

Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com>
Reviewed-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Reviewed-by: Jason Liu <jason.hui.liu@nxp.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alex Marginean 2021-03-07 15:23:38 +02:00 committed by Greg Kroah-Hartman
parent 697082b125
commit 852143ed96
2 changed files with 8 additions and 0 deletions
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2
drivers/net/ethernet/freescale/enetc/enetc_hw.h
View File

@ -234,6 +234,8 @@ 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

6
drivers/net/ethernet/freescale/enetc/enetc_pf.c
View File

@ -490,6 +490,12 @@ static void enetc_configure_port_mac(struct enetc_hw *hw)
enetc_port_wr(hw, ENETC_PM1_CMD_CFG, ENETC_PM0_CMD_PHY_TX_EN |
ENETC_PM0_CMD_TXP | ENETC_PM0_PROMISC);
/* On LS1028A, the MAC RX FIFO defaults to 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_mac_config(struct enetc_hw *hw, phy_interface_t phy_mode)