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Commit eb1ddc00 authored by Stefano Stabellini's avatar Stefano Stabellini
Browse files

swiotlb-xen: introduce xen_swiotlb_set_dma_mask 



Implement xen_swiotlb_set_dma_mask, use it for set_dma_mask on arm.

Signed-off-by: default avatarStefano Stabellini <stefano.stabellini@eu.citrix.com>
parent 83862ccf

arch/arm/xen/mm.c

+1 −0
Original line number Original line Diff line number Diff line
@@ -51,6 +51,7 @@ static struct dma_map_ops xen_swiotlb_dma_ops = { 
	.map_page = xen_swiotlb_map_page,

	.map_page = xen_swiotlb_map_page,

	.unmap_page = xen_swiotlb_unmap_page,

	.unmap_page = xen_swiotlb_unmap_page,

	.dma_supported = xen_swiotlb_dma_supported,

	.dma_supported = xen_swiotlb_dma_supported,

	.set_dma_mask = xen_swiotlb_set_dma_mask,

};

};





int __init xen_mm_init(void)

int __init xen_mm_init(void)

drivers/xen/swiotlb-xen.c

+12 −0
Original line number Original line Diff line number Diff line
@@ -608,3 +608,15 @@ xen_swiotlb_dma_supported(struct device *hwdev, u64 mask) 
	return xen_virt_to_bus(xen_io_tlb_end - 1) <= mask;

	return xen_virt_to_bus(xen_io_tlb_end - 1) <= mask;

}

}

EXPORT_SYMBOL_GPL(xen_swiotlb_dma_supported);

EXPORT_SYMBOL_GPL(xen_swiotlb_dma_supported);



int

xen_swiotlb_set_dma_mask(struct device *dev, u64 dma_mask)

{

	if (!dev->dma_mask || !xen_swiotlb_dma_supported(dev, dma_mask))

		return -EIO;



	*dev->dma_mask = dma_mask;



	return 0;

}

EXPORT_SYMBOL_GPL(xen_swiotlb_set_dma_mask);

include/xen/swiotlb-xen.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -55,4 +55,6 @@ xen_swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); 
extern int

extern int

xen_swiotlb_dma_supported(struct device *hwdev, u64 mask);

xen_swiotlb_dma_supported(struct device *hwdev, u64 mask);





extern int

xen_swiotlb_set_dma_mask(struct device *dev, u64 dma_mask);

#endif /* __LINUX_SWIOTLB_XEN_H */
 
#endif /* __LINUX_SWIOTLB_XEN_H */