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arm64: dma_mapping: Implement .dma_supported()

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The dma_supported() API checks to see if the device can support DMA to
the memory described by the mask.  Implement this for the DMA IOMMU
mapper by calling into the IOMMU's iommu_dma_supported API.

Change-Id: I5e31e386cd40c3f3312e1be1ca516c6e72213547
Signed-off-by: Neeti Desai <neetid@codeaurora.org>
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
This commit is contained in:
Neeti Desai 2015-05-13 17:57:25 -07:00 • committed by David Keitel
parent ad9a4c040c
commit 5ba8d1e0c4
1 changed files with 14 additions and 0 deletions
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14
arch/arm64/mm/dma-mapping.c
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@ -1942,6 +1942,18 @@ static void arm_iommu_sync_single_for_device(struct device *dev,
__dma_page_cpu_to_dev(page, offset, size, dir);
}
static int arm_iommu_dma_supported(struct device *dev, u64 mask)
{
struct dma_iommu_mapping *mapping = to_dma_iommu_mapping(dev);
if (!mapping) {
dev_warn(dev, "No IOMMU mapping for device\n");
return 0;
}
return iommu_dma_supported(mapping->domain, dev, mask);
}
const struct dma_map_ops iommu_ops = {
.alloc = arm_iommu_alloc_attrs,
.free = arm_iommu_free_attrs,
@ -1959,6 +1971,7 @@ const struct dma_map_ops iommu_ops = {
.sync_sg_for_device = arm_iommu_sync_sg_for_device,
.set_dma_mask = arm_dma_set_mask,
.dma_supported = arm_iommu_dma_supported,
};
const struct dma_map_ops iommu_coherent_ops = {
@ -1974,6 +1987,7 @@ const struct dma_map_ops iommu_coherent_ops = {
.unmap_sg = arm_coherent_iommu_unmap_sg,
.set_dma_mask = arm_dma_set_mask,
.dma_supported = arm_iommu_dma_supported,
};
/**