Messages in this thread Patch in this message | | | From | Laurentiu Tudor <> | Subject | [RFC PATCH 2/3] iommu/dma: wire-up new dma op dma_addr_to_phys_addr() | Date | Tue, 22 Oct 2019 12:55:16 +0000 |
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From: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Add an implementation of the newly introduced dma map op in the generic DMA IOMMU generic glue layer and wire it up.
Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com> --- drivers/iommu/dma-iommu.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index f321279baf9e..0d2856793ecd 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -1091,6 +1091,17 @@ static unsigned long iommu_dma_get_merge_boundary(struct device *dev) return (1UL << __ffs(domain->pgsize_bitmap)) - 1; } +static phys_addr_t iommu_dma_dma_addr_to_phys_addr(struct device *dev, + dma_addr_t dma_handle) +{ + struct iommu_domain *domain = iommu_get_domain_for_dev(dev); + + if (domain) + return iommu_iova_to_phys(domain, dma_handle); + + return 0; +} + static const struct dma_map_ops iommu_dma_ops = { .alloc = iommu_dma_alloc, .free = iommu_dma_free, @@ -1107,6 +1118,7 @@ static const struct dma_map_ops iommu_dma_ops = { .map_resource = iommu_dma_map_resource, .unmap_resource = iommu_dma_unmap_resource, .get_merge_boundary = iommu_dma_get_merge_boundary, + .dma_addr_to_phys_addr = iommu_dma_dma_addr_to_phys_addr, }; /* -- 2.17.1
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