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| author | Christoph Hellwig <hch@lst.de> | 2018-01-09 18:44:16 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-01-15 11:35:45 +0300 |
| commit | 251533eb35b22f9e87a440b14c6f20e2626397b3 (patch) | |
| tree | 11ac4d11d10b40b73245103f9eddbecb65d7859b /include/linux/swiotlb.h | |
| parent | 7f2c8bbd321f18e4ccfd262748bd58fb7d4bb1db (diff) | |
| download | linux-251533eb35b22f9e87a440b14c6f20e2626397b3.tar.xz | |
swiotlb: add common swiotlb_map_ops
Currently all architectures that want to use swiotlb have to implement
their own dma_map_ops instances. Provide a generic one based on the
x86 implementation which first calls into dma_direct to try a full blown
direct mapping implementation (including e.g. CMA) before falling back
allocating from the swiotlb buffer.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christian König <christian.koenig@amd.com>
Diffstat (limited to 'include/linux/swiotlb.h')
| -rw-r--r-- | include/linux/swiotlb.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index 606375e35d87..5b1f2a00491c 100644 --- a/include/linux/swiotlb.h +++ b/include/linux/swiotlb.h @@ -66,6 +66,12 @@ extern void swiotlb_tbl_sync_single(struct device *hwdev, enum dma_sync_target target); /* Accessory functions. */ + +void *swiotlb_alloc(struct device *hwdev, size_t size, dma_addr_t *dma_handle, + gfp_t flags, unsigned long attrs); +void swiotlb_free(struct device *dev, size_t size, void *vaddr, + dma_addr_t dma_addr, unsigned long attrs); + extern void *swiotlb_alloc_coherent(struct device *hwdev, size_t size, dma_addr_t *dma_handle, gfp_t flags); @@ -126,4 +132,6 @@ extern void swiotlb_print_info(void); extern int is_swiotlb_buffer(phys_addr_t paddr); extern void swiotlb_set_max_segment(unsigned int); +extern const struct dma_map_ops swiotlb_dma_ops; + #endif /* __LINUX_SWIOTLB_H */ |