Commit 1b2395df authored by Alex Marginean's avatar Alex Marginean Committed by David S. Miller
Browse files

net: enetc: set MAC RX FIFO to recommended value 



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: default avatarAlex Marginean <alexandru.marginean@nxp.com>
Reviewed-by: default avatarClaudiu Manoil <claudiu.manoil@nxp.com>
Reviewed-by: default avatarJason Liu <jason.hui.liu@nxp.com>
Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2e269622

drivers/net/ethernet/freescale/enetc/enetc_hw.h

+2 −0
Original line number Diff line number Diff line
@@ -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

drivers/net/ethernet/freescale/enetc/enetc_pf.c

+6 −0
Original line number Diff line number Diff line
@@ -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)