diff options
Diffstat (limited to 'drivers/iommu/amd_iommu.c')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index c0b2f4fc6bfc..281cacbd5816 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -2252,6 +2252,17 @@ static void update_domain(struct protection_domain *domain) domain->updated = false; } +static int dir2prot(enum dma_data_direction direction) +{ + if (direction == DMA_TO_DEVICE) + return IOMMU_PROT_IR; + else if (direction == DMA_FROM_DEVICE) + return IOMMU_PROT_IW; + else if (direction == DMA_BIDIRECTIONAL) + return IOMMU_PROT_IW | IOMMU_PROT_IR; + else + return 0; +} /* * This function contains common code for mapping of a physically * contiguous memory region into DMA address space. It is used by all @@ -2262,7 +2273,7 @@ static dma_addr_t __map_single(struct device *dev, struct dma_ops_domain *dma_dom, phys_addr_t paddr, size_t size, - int direction, + enum dma_data_direction direction, u64 dma_mask) { dma_addr_t offset = paddr & ~PAGE_MASK; @@ -2278,12 +2289,7 @@ static dma_addr_t __map_single(struct device *dev, if (address == DMA_ERROR_CODE) goto out; - if (direction == DMA_TO_DEVICE) - prot = IOMMU_PROT_IR; - else if (direction == DMA_FROM_DEVICE) - prot = IOMMU_PROT_IW; - else if (direction == DMA_BIDIRECTIONAL) - prot = IOMMU_PROT_IW | IOMMU_PROT_IR; + prot = dir2prot(direction); start = address; for (i = 0; i < pages; ++i) { |