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| author | Christoph Hellwig <hch@lst.de> | 2018-11-04 19:27:56 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-12-01 19:55:02 +0300 |
| commit | b18814e767a445534ab9ccba02e82a31208f85d6 (patch) | |
| tree | 7311d387b5e13abe09b3c9247d007c4efffc881e /include/linux/dma-direct.h | |
| parent | c9d76d0655c06b8c1f944e46c4fd9e9cf4b331c0 (diff) | |
| download | linux-b18814e767a445534ab9ccba02e82a31208f85d6.tar.xz | |
dma-direct: provide page based alloc/free helpers
Some architectures support remapping highmem into DMA coherent
allocations. To use the common code for them we need variants of
dma_direct_{alloc,free}_pages that do not use kernel virtual addresses.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Diffstat (limited to 'include/linux/dma-direct.h')
| -rw-r--r-- | include/linux/dma-direct.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/dma-direct.h b/include/linux/dma-direct.h index 9e66bfe369aa..61b78f934f64 100644 --- a/include/linux/dma-direct.h +++ b/include/linux/dma-direct.h @@ -67,6 +67,9 @@ void *dma_direct_alloc_pages(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs); void dma_direct_free_pages(struct device *dev, size_t size, void *cpu_addr, dma_addr_t dma_addr, unsigned long attrs); +struct page *__dma_direct_alloc_pages(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs); +void __dma_direct_free_pages(struct device *dev, size_t size, struct page *page); dma_addr_t dma_direct_map_page(struct device *dev, struct page *page, unsigned long offset, size_t size, enum dma_data_direction dir, unsigned long attrs); |