65f87d8a8a
It was broken before. But having it is important as possible hardware bug workaround. And previously there was no way to force swiotlb if there is another IOMMU. Side effect is that iommu=force won't force swiotlb anymore even if there isn't another IOMMU. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
55 lines
1.9 KiB
C
55 lines
1.9 KiB
C
#ifndef _ASM_SWIOTLB_H
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#define _ASM_SWTIOLB_H 1
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#include <asm/dma-mapping.h>
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/* SWIOTLB interface */
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extern dma_addr_t swiotlb_map_single(struct device *hwdev, void *ptr,
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size_t size, int dir);
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extern void *swiotlb_alloc_coherent(struct device *hwdev, size_t size,
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dma_addr_t *dma_handle, gfp_t flags);
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extern void swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr,
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size_t size, int dir);
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extern void swiotlb_sync_single_for_cpu(struct device *hwdev,
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dma_addr_t dev_addr,
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size_t size, int dir);
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extern void swiotlb_sync_single_for_device(struct device *hwdev,
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dma_addr_t dev_addr,
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size_t size, int dir);
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extern void swiotlb_sync_single_range_for_cpu(struct device *hwdev,
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dma_addr_t dev_addr,
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unsigned long offset,
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size_t size, int dir);
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extern void swiotlb_sync_single_range_for_device(struct device *hwdev,
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dma_addr_t dev_addr,
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unsigned long offset,
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size_t size, int dir);
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extern void swiotlb_sync_sg_for_cpu(struct device *hwdev,
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struct scatterlist *sg, int nelems,
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int dir);
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extern void swiotlb_sync_sg_for_device(struct device *hwdev,
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struct scatterlist *sg, int nelems,
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int dir);
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extern int swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg,
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int nents, int direction);
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extern void swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg,
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int nents, int direction);
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extern int swiotlb_dma_mapping_error(dma_addr_t dma_addr);
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extern void swiotlb_free_coherent (struct device *hwdev, size_t size,
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void *vaddr, dma_addr_t dma_handle);
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extern int swiotlb_dma_supported(struct device *hwdev, u64 mask);
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extern void swiotlb_init(void);
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extern int swiotlb_force;
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#ifdef CONFIG_SWIOTLB
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extern int swiotlb;
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#else
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#define swiotlb 0
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#endif
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extern void pci_swiotlb_init(void);
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#endif /* _ASM_SWTIOLB_H */
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