[PATCH v4 04/24] dt-bindings: memory: mediatek: Add domain definition
Krzysztof Kozlowski
krzk at kernel.org
Wed Nov 11 16:30:41 EST 2020
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 at mediatek.com>
> ---
> include/dt-bindings/memory/mtk-smi-larb-port.h | 9 ++++++++-
> 1 file changed, 8 insertions(+), 1 deletion(-)
>
Acked-by: Krzysztof Kozlowski <krzk at kernel.org>
Best regards,
Krzysztof
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