Re: [PATCH v4 04/24] dt-bindings: memory: mediatek: Add domain definition
From: Krzysztof Kozlowski <krzk@kernel.org>
Date: 2020-11-11 21:30:48
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linux-devicetree, linux-iommu, linux-mediatek, lkml
On Wed, Nov 11, 2020 at 08:38:18PM +0800, Yong Wu wrote:
In the latest SoC, there are several HW IP require a sepecial iova range, mainly CCU and VPU has this requirement. Take CCU as a example, CCU require its iova locate in the range(0x4000_0000 ~ 0x43ff_ffff). In this patch we add a domain definition for the special port. In the example of CCU, If we preassign CCU port in domain1, then iommu driver will prepare a independent iommu domain of the special iova range for it, then the iova got from dma_alloc_attrs(ccu-dev) will locate in its special range. This is a preparing patch for multi-domain support. Signed-off-by: Yong Wu <yong.wu@mediatek.com> --- include/dt-bindings/memory/mtk-smi-larb-port.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
Acked-by: Krzysztof Kozlowski <krzk@kernel.org> Best regards, Krzysztof _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel