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amd-xgbe: Check Rx queue fifos before stopping Rx DMA

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Check to be sure that the Rx queue fifos are empty before stopping the
Rx DMA channels.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lendacky, Thomas
2016-02-17 11:49:16 -06:00
committed by David S. Miller
parent b3b715974b
commit c3727d61ea
2 changed files with 37 additions and 3 deletions
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10
drivers/net/ethernet/amd/xgbe/xgbe-common.h
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@@ -6,7 +6,7 @@
*
* License 1: GPLv2
*
* Copyright (c) 2014 Advanced Micro Devices, Inc.
* Copyright (c) 2014-2016 Advanced Micro Devices, Inc.
*
* This file is free software; you may copy, redistribute and/or modify
* it under the terms of the GNU General Public License as published by
@@ -56,7 +56,7 @@
*
* License 2: Modified BSD
*
* Copyright (c) 2014 Advanced Micro Devices, Inc.
* Copyright (c) 2014-2016 Advanced Micro Devices, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -768,12 +768,16 @@
#define MTL_Q_TQDR 0x08
#define MTL_Q_RQOMR 0x40
#define MTL_Q_RQMPOCR 0x44
#define MTL_Q_RQDR 0x4c
#define MTL_Q_RQDR 0x48
#define MTL_Q_RQFCR 0x50
#define MTL_Q_IER 0x70
#define MTL_Q_ISR 0x74
/* MTL queue register entry bit positions and sizes */
#define MTL_Q_RQDR_PRXQ_INDEX 16
#define MTL_Q_RQDR_PRXQ_WIDTH 14
#define MTL_Q_RQDR_RXQSTS_INDEX 4
#define MTL_Q_RQDR_RXQSTS_WIDTH 2
#define MTL_Q_RQFCR_RFA_INDEX 1
#define MTL_Q_RQFCR_RFA_WIDTH 6
#define MTL_Q_RQFCR_RFD_INDEX 17