From a869572c3196440e96d62d61320e4ae2f530b02e Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sun, 21 May 2017 13:26:45 +0200 Subject: [PATCH] iommu/amd: implement ->mapping_error DMA_ERROR_CODE is going to go away, so don't rely on it. Signed-off-by: Christoph Hellwig --- drivers/iommu/amd_iommu.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 63cacf5..d41280e 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -54,6 +54,8 @@ #include "amd_iommu_types.h" #include "irq_remapping.h" +#define AMD_IOMMU_MAPPING_ERROR 0 + #define CMD_SET_TYPE(cmd, t) ((cmd)->data[1] |= ((t) << 28)) #define LOOP_TIMEOUT 100000 @@ -2394,7 +2396,7 @@ static dma_addr_t __map_single(struct device *dev, paddr &= PAGE_MASK; address = dma_ops_alloc_iova(dev, dma_dom, pages, dma_mask); - if (address == DMA_ERROR_CODE) + if (address == AMD_IOMMU_MAPPING_ERROR) goto out; prot = dir2prot(direction); @@ -2431,7 +2433,7 @@ out_unmap: dma_ops_free_iova(dma_dom, address, pages); - return DMA_ERROR_CODE; + return AMD_IOMMU_MAPPING_ERROR; } /* @@ -2483,7 +2485,7 @@ static dma_addr_t map_page(struct device *dev, struct page *page, if (PTR_ERR(domain) == -EINVAL) return (dma_addr_t)paddr; else if (IS_ERR(domain)) - return DMA_ERROR_CODE; + return AMD_IOMMU_MAPPING_ERROR; dma_mask = *dev->dma_mask; dma_dom = to_dma_ops_domain(domain); @@ -2560,7 +2562,7 @@ static int map_sg(struct device *dev, struct scatterlist *sglist, npages = sg_num_pages(dev, sglist, nelems); address = dma_ops_alloc_iova(dev, dma_dom, npages, dma_mask); - if (address == DMA_ERROR_CODE) + if (address == AMD_IOMMU_MAPPING_ERROR) goto out_err; prot = dir2prot(direction); @@ -2683,7 +2685,7 @@ static void *alloc_coherent(struct device *dev, size_t size, *dma_addr = __map_single(dev, dma_dom, page_to_phys(page), size, DMA_BIDIRECTIONAL, dma_mask); - if (*dma_addr == DMA_ERROR_CODE) + if (*dma_addr == AMD_IOMMU_MAPPING_ERROR) goto out_free; return page_address(page); @@ -2732,6 +2734,11 @@ static int amd_iommu_dma_supported(struct device *dev, u64 mask) return check_device(dev); } +static int amd_iommu_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + return dma_addr == AMD_IOMMU_MAPPING_ERROR; +} + static const struct dma_map_ops amd_iommu_dma_ops = { .alloc = alloc_coherent, .free = free_coherent, @@ -2740,6 +2747,7 @@ static const struct dma_map_ops amd_iommu_dma_ops = { .map_sg = map_sg, .unmap_sg = unmap_sg, .dma_supported = amd_iommu_dma_supported, + .mapping_error = amd_iommu_mapping_error, }; static int init_reserved_iova_ranges(void) -- 2.7.4