Messages in this thread Patch in this message | | | From | Stefano Stabellini <> | Subject | [PATCH v6 3/7] xen/arm: introduce is_dma_coherent | Date | Sat, 25 Oct 2014 14:57:18 +0100 |
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Introduce a simple utility function that returns whether a device is dma coherent based on device tree information.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> CC: catalin.marinas@arm.com CC: Will.Deacon@arm.com --- arch/arm/xen/mm32.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/arch/arm/xen/mm32.c b/arch/arm/xen/mm32.c index 6153d61..2b259f1 100644 --- a/arch/arm/xen/mm32.c +++ b/arch/arm/xen/mm32.c @@ -2,10 +2,16 @@ #include <linux/dma-mapping.h> #include <linux/gfp.h> #include <linux/highmem.h> +#include <linux/of_address.h> #include <xen/features.h> +static inline bool is_dma_coherent(struct device *dev) +{ + return of_dma_is_coherent(dev->of_node); +} + /* functions called by SWIOTLB */ static void dma_cache_maint(dma_addr_t handle, unsigned long offset, -- 1.7.10.4
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