linux-kernel - [PATCH 0/2] Add dma-coherent for gs101 UFS dt node

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Message-Id: <20250314-ufs-dma-coherent-v1-0-bdf9f9be2919@linaro.org>
Date: Fri, 14 Mar 2025 15:38:01 +0000
From: Peter Griffin <peter.griffin@...aro.org>
To: André Draszik <andre.draszik@...aro.org>, 
 Tudor Ambarus <tudor.ambarus@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>, 
 Avri Altman <avri.altman@....com>, Bart Van Assche <bvanassche@....org>, 
 "Martin K. Petersen" <martin.petersen@...cle.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, 
 linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-scsi@...r.kernel.org, kernel-team@...roid.com, 
 willmcvicker@...gle.com, Peter Griffin <peter.griffin@...aro.org>, 
 stable@...r.kernel.org
Subject: [PATCH 0/2] Add dma-coherent for gs101 UFS dt node

ufs-exynos driver enables the shareability option for gs101 which
means the descriptors need to be allocated as cacheable.

Fix the DT node and update bindings to add the dma-coherent property.

This fixes the UFS stability issues we have seen with the upstream
UFS driver.

Note this DT fix can go in independently of the other UFS fixes series
I sent recently [1], as the bootloader already leaves the sharability
bits enabled.

regards,

Peter

[1] https://lore.kernel.org/linux-scsi/20250226220414.343659-1-peter.griffin@linaro.org/

To: André Draszik <andre.draszik@...aro.org>
To: Tudor Ambarus <tudor.ambarus@...aro.org>
To: Rob Herring <robh@...nel.org>
To: Krzysztof Kozlowski <krzk+dt@...nel.org>
To: Conor Dooley <conor+dt@...nel.org>
To: Alim Akhtar <alim.akhtar@...sung.com>
To: Avri Altman <avri.altman@....com>
To: Bart Van Assche <bvanassche@....org>
To: Martin K. Petersen <martin.petersen@...cle.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-samsung-soc@...r.kernel.org
Cc: devicetree@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Cc: linux-scsi@...r.kernel.org
Cc: kernel-team@...roid.com
Cc: willmcvicker@...gle.com

Signed-off-by: Peter Griffin <peter.griffin@...aro.org>
---
Peter Griffin (2):
      arm64: dts: exynos: gs101: ufs: add dma-coherent property
      scsi: ufs: dt-bindings: exynos: add dma-coherent property for gs101

 Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml | 2 ++
 arch/arm64/boot/dts/exynos/google/gs101.dtsi                  | 1 +
 2 files changed, 3 insertions(+)
---
base-commit: b323d8e7bc03d27dec646bfdccb7d1a92411f189
change-id: 20250314-ufs-dma-coherent-980f2467690d

Best regards,
-- 
Peter Griffin <peter.griffin@...aro.org>