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swiotlb-xen: introduce xen_swiotlb_set_dma_mask

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Implement xen_swiotlb_set_dma_mask, use it for set_dma_mask on arm.

Signed-off-by: Stefano Stabellini <[email protected]>
This commit is contained in:
Stefano Stabellini 2013-10-09 16:56:33 +00:00
commit eb1ddc00b8
3 changed files with 15 additions and 0 deletions
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12
drivers/xen/swiotlb-xen.c
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@ -608,3 +608,15 @@ xen_swiotlb_dma_supported(struct device *hwdev, u64 mask)
return xen_virt_to_bus(xen_io_tlb_end - 1) <= mask;
}
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);