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| author | Christoph Hellwig <hch@lst.de> | 2021-01-28 14:53:22 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2021-03-15 10:02:31 +0100 |
| commit | eedb0b12d091a21909b5e84d9f3e5e649305bd12 (patch) | |
| tree | 82524abc75941a66dedc9f476cd576eebc7ba225 /include | |
| parent | 1e28eed17697bcf343c6743f0028cc3b5dd88bf0 (diff) | |
| download | linux-stable-eedb0b12d091a21909b5e84d9f3e5e649305bd12.tar.gz linux-stable-eedb0b12d091a21909b5e84d9f3e5e649305bd12.tar.bz2 linux-stable-eedb0b12d091a21909b5e84d9f3e5e649305bd12.zip | |
dma-mapping: add a dma_mmap_pages helper
Add a helper to map memory allocated using dma_alloc_pages into
a user address space, similar to the dma_alloc_attrs function for
coherent allocations.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Tested-by: Ricardo Ribalda <ribalda@chromium.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/dma-mapping.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 2a984cb4d1e0..2b8dce756e1f 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -263,6 +263,8 @@ struct page *dma_alloc_pages(struct device *dev, size_t size, dma_addr_t *dma_handle, enum dma_data_direction dir, gfp_t gfp); void dma_free_pages(struct device *dev, size_t size, struct page *page, dma_addr_t dma_handle, enum dma_data_direction dir); +int dma_mmap_pages(struct device *dev, struct vm_area_struct *vma, + size_t size, struct page *page); static inline void *dma_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *dma_handle, enum dma_data_direction dir, gfp_t gfp) |