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authorStefano Stabellini <stefano.stabellini@eu.citrix.com>2013-10-09 20:56:33 +0400
committerStefano Stabellini <stefano.stabellini@eu.citrix.com>2013-10-09 20:56:33 +0400
commiteb1ddc00b81cb8cb23891b6c7c5fbfaea29f3c73 (patch)
tree19cef10472e84e085d51068fdff191749c829a78 /drivers/xen/swiotlb-xen.c
parent83862ccfc0a03212fde43b4ac29c28381828768b (diff)
downloadlinux-eb1ddc00b81cb8cb23891b6c7c5fbfaea29f3c73.tar.xz
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: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Diffstat (limited to 'drivers/xen/swiotlb-xen.c')
-rw-r--r--drivers/xen/swiotlb-xen.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index f0fc1a4f565a..d8ef0bf577d2 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -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);