[dpdk-dev] [PATCH 04/10] net/enetc: erratum wa for Rx lock-up issue

[Hemant Agrawal]

From: Alex Marginean <alexandru.margin...@nxp.com>

The default value in hardware for the Rx MAC FIFO (@) is higher than it
should be and can lead to Rx lock-up under traffic.
Set it to the value recommended by hardware team, 1.

Signed-off-by: Alex Marginean <alexandru.margin...@nxp.com>
Signed-off-by: Gagandeep Singh <g.si...@nxp.com>
---
 drivers/net/enetc/base/enetc_hw.h | 3 ++-
 drivers/net/enetc/enetc_ethdev.c  | 5 ++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/enetc/base/enetc_hw.h 
b/drivers/net/enetc/base/enetc_hw.h
index 2fe7ccb5b..00813284e 100644
--- a/drivers/net/enetc/base/enetc_hw.h
+++ b/drivers/net/enetc/base/enetc_hw.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: BSD-3-Clause
- * Copyright 2018-2019 NXP
+ * Copyright 2018-2020 NXP
  */
 
 #ifndef _ENETC_HW_H_
@@ -86,6 +86,7 @@ enum enetc_bdr_type {TX, RX};
 #define ENETC_PSIPMAR1(n)              (0x00104 + (n) * 0x20)
 #define ENETC_PCAPR0                   0x00900
 #define ENETC_PCAPR1                   0x00904
+#define ENETC_PM0_RX_FIFO              0x801C
 #define ENETC_PM0_IF_MODE              0x8300
 #define ENETC_PM1_IF_MODE              0x9300
 #define ENETC_PMO_IFM_RG               BIT(2)
diff --git a/drivers/net/enetc/enetc_ethdev.c b/drivers/net/enetc/enetc_ethdev.c
index 20b77c006..eb637d030 100644
--- a/drivers/net/enetc/enetc_ethdev.c
+++ b/drivers/net/enetc/enetc_ethdev.c
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: BSD-3-Clause
- * Copyright 2018-2019 NXP
+ * Copyright 2018-2020 NXP
  */
 
 #include <stdbool.h>
@@ -147,6 +147,9 @@ enetc_hardware_init(struct enetc_eth_hw *hw)
        hw->hw.port = (void *)((size_t)hw->hw.reg + ENETC_PORT_BASE);
        hw->hw.global = (void *)((size_t)hw->hw.reg + ENETC_GLOBAL_BASE);
 
+       /* WA for Rx lock-up HW erratum */
+       enetc_port_wr(enetc_hw, ENETC_PM0_RX_FIFO, 1);
+
        /* Enabling Station Interface */
        enetc_wr(enetc_hw, ENETC_SIMR, ENETC_SIMR_EN);
 
-- 
2.17.1