diff options
| author | Neeti Desai <neetid@codeaurora.org> | 2015-05-13 17:57:25 -0700 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-22 11:12:41 -0700 |
| commit | 5ba8d1e0c463cdff70cca40c0992e9ad47a1e051 (patch) | |
| tree | d66f1ed9c95df66d633bbb376d82d757c2045121 /arch | |
| parent | ad9a4c040c188d7761f7da055bfc6b4ad3b4ab62 (diff) | |
arm64: dma_mapping: Implement .dma_supported()
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/mm/dma-mapping.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c index 08df069bc056..7f6d6e318e88 100644 --- a/arch/arm64/mm/dma-mapping.c +++ b/arch/arm64/mm/dma-mapping.c @@ -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, }; /** |