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[4.19,35/66] amd-xgbe: Update DMA coherency values

Message ID 20210412083959.257091759@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman April 12, 2021, 8:40 a.m. UTC 
From: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>

[ Upstream commit d75135082698140a26a56defe1bbc1b06f26a41f ]

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: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/amd/xgbe/xgbe.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
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Patch

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe.h b/drivers/net/ethernet/amd/xgbe/xgbe.h
index 47bcbcf58048..0c93a552b921 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe.h
+++ b/drivers/net/ethernet/amd/xgbe/xgbe.h
@@ -181,9 +181,9 @@ 
 #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