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44 lines
1.7 KiB
Diff
44 lines
1.7 KiB
Diff
From 9507f517ac4080627515c31c937f45a4a58ccbe4 Mon Sep 17 00:00:00 2001
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From: Alex Marginean <alexandru.marginean@nxp.com>
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Date: Fri, 14 Feb 2020 17:28:26 +0000
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Subject: [PATCH] LF-924: net/enetc: Set MAC Rx FIFO to recommended value
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On LS1028A the MAC Rx FIFO defaults to value 2, which is too high and may
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lead to Rx lock-up under traffic. Set it to 1 instead, as recommended by
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the hardware team.
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Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com>
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Reviewed-by: Claudiu Manoil <claudiu.manoil@nxp.com>
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Acked-by: Jason Liu <jason.hui.liu@nxp.com>
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---
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drivers/net/ethernet/freescale/enetc/enetc_hw.h | 2 ++
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drivers/net/ethernet/freescale/enetc/enetc_pf.c | 6 ++++++
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2 files changed, 8 insertions(+)
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--- a/drivers/net/ethernet/freescale/enetc/enetc_hw.h
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+++ b/drivers/net/ethernet/freescale/enetc/enetc_hw.h
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@@ -224,6 +224,8 @@ enum enetc_bdr_type {TX, RX};
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#define ENETC_PM0_MAXFRM 0x8014
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#define ENETC_SET_TX_MTU(val) ((val) << 16)
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#define ENETC_SET_MAXFRM(val) ((val) & 0xffff)
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+#define ENETC_PM0_RX_FIFO 0x801c
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+#define ENETC_PM0_RX_FIFO_VAL 1
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#define ENETC_PM_IMDIO_BASE 0x8030
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/* PCS registers */
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--- a/drivers/net/ethernet/freescale/enetc/enetc_pf.c
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+++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
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@@ -536,6 +536,12 @@ static void enetc_configure_port_mac(str
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enetc_port_wr(hw, ENETC_PM0_IF_MODE, ENETC_PM0_IFM_XGMII);
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enetc_port_wr(hw, ENETC_PM1_IF_MODE, ENETC_PM0_IFM_XGMII);
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}
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+
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+ /* on LS1028A the MAC Rx FIFO defaults to value 2, which is too high and
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+ * may lead to Rx lock-up under traffic. Set it to 1 instead, as
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+ * recommended by the hardware team.
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+ */
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+ enetc_port_wr(hw, ENETC_PM0_RX_FIFO, ENETC_PM0_RX_FIFO_VAL);
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}
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static void enetc_configure_port_pmac(struct enetc_hw *hw)
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