diff options
Diffstat (limited to 'arch/arm/mm')
| -rw-r--r-- | arch/arm/mm/dma-mapping.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 00cc892fbe59..8bda55f00b7b 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -2085,6 +2085,25 @@ 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); +} + +static int arm_iommu_mapping_error(struct device *dev, + dma_addr_t dma_addr) +{ + return dma_addr == DMA_ERROR_CODE; +} + + const struct dma_map_ops iommu_ops = { .alloc = arm_iommu_alloc_attrs, .free = arm_iommu_free_attrs, @@ -2102,6 +2121,8 @@ 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, + .mapping_error = arm_iommu_mapping_error, }; const struct dma_map_ops iommu_coherent_ops = { |