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SubjectRe: [PATCH v7 3/8] arm64: introduce is_device_dma_coherent
On Mon, 27 Oct 2014, Stefano Stabellini wrote:
> Introduce a boolean flag and an accessor function to check whether a
> device is dma_coherent. Set the flag from set_arch_dma_coherent_ops.
>
> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
> CC: will.deacon@arm.com

Will, Catalin,
are you OK with this patch?


> arch/arm64/include/asm/device.h | 1 +
> arch/arm64/include/asm/dma-mapping.h | 6 ++++++
> 2 files changed, 7 insertions(+)
>
> diff --git a/arch/arm64/include/asm/device.h b/arch/arm64/include/asm/device.h
> index cf98b36..243ef25 100644
> --- a/arch/arm64/include/asm/device.h
> +++ b/arch/arm64/include/asm/device.h
> @@ -21,6 +21,7 @@ struct dev_archdata {
> #ifdef CONFIG_IOMMU_API
> void *iommu; /* private IOMMU data */
> #endif
> + bool dma_coherent;
> };
>
> struct pdev_archdata {
> diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h
> index adeae3f..e213dc4 100644
> --- a/arch/arm64/include/asm/dma-mapping.h
> +++ b/arch/arm64/include/asm/dma-mapping.h
> @@ -54,11 +54,17 @@ static inline void set_dma_ops(struct device *dev, struct dma_map_ops *ops)
>
> static inline int set_arch_dma_coherent_ops(struct device *dev)
> {
> + dev->archdata.dma_coherent = true;
> set_dma_ops(dev, &coherent_swiotlb_dma_ops);
> return 0;
> }
> #define set_arch_dma_coherent_ops set_arch_dma_coherent_ops
>
> +static inline bool is_device_dma_coherent(struct device *dev)
> +{
> + return dev->archdata.dma_coherent;
> +}
> +
> #include <asm-generic/dma-mapping-common.h>
>
> static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
> --
> 1.7.10.4
>


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