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iommu/amd: implement ->mapping_error 

DMA_ERROR_CODE is going to go away, so don't rely on it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig 2017-05-21 13:26:45 +02:00
parent e830467143
commit a869572c31
1 changed files with 13 additions and 5 deletions
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18
drivers/iommu/amd_iommu.c
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@ -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)