From 72fb2f96fb6883f8e51d56c0b707015e8ac8ebb6 Mon Sep 17 00:00:00 2001

From: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>

Date: Thu, 25 Mar 2021 08:39:12 +0530

Subject: [PATCH 11/19] amd-xgbe: Update DMA coherency values

Git-commit: d75135082698140a26a56defe1bbc1b06f26a41f

Patch-mainline: v5.12-rc7

References: git-fixes

Based on the IOMMU configuration, the current cache control settings can

result in possible coherency issues. The hardware team has recommended

new settings for the PCI device path to eliminate the issue.

Fixes: 6f595959c095 ("amd-xgbe: Adjust register settings to improve performance")

Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>

Acked-by: Tom Lendacky <thomas.lendacky@amd.com>

Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Denis Kirjanov <denis.kirjanov@suse.com>

---

 drivers/net/ethernet/amd/xgbe/xgbe.h | 6 +++---

 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe.h b/drivers/net/ethernet/amd/xgbe/xgbe.h

index 5897e46faca5..95b590f1efae 100644

--- a/drivers/net/ethernet/amd/xgbe/xgbe.h

+++ b/drivers/net/ethernet/amd/xgbe/xgbe.h

@@ -180,9 +180,9 @@

 #define XGBE_DMA_SYS_AWCR	0x30303030

 /* DMA cache settings - PCI device */

-#define XGBE_DMA_PCI_ARCR	0x00000003

-#define XGBE_DMA_PCI_AWCR	0x13131313

-#define XGBE_DMA_PCI_AWARCR	0x00000313

+#define XGBE_DMA_PCI_ARCR	0x000f0f0f

+#define XGBE_DMA_PCI_AWCR	0x0f0f0f0f

+#define XGBE_DMA_PCI_AWARCR	0x00000f0f

 /* DMA channel interrupt modes */

 #define XGBE_IRQ_MODE_EDGE	0

-- 

2.16.4