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| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2012-03-28 18:36:27 +0400 |
|---|---|---|
| committer | Marek Szyprowski <m.szyprowski@samsung.com> | 2012-03-28 18:36:27 +0400 |
| commit | 613c4578d4079a14dbee76ef7e0c80f635522fe3 (patch) | |
| tree | cd833ec1ae6f510153ffddb3ff3e22d2443b832d | |
| parent | c16fa4f2ad19908a47c63d8fa436a1178438c7e7 (diff) | |
| download | linux-613c4578d4079a14dbee76ef7e0c80f635522fe3.tar.xz | |
common: dma-mapping: introduce generic alloc() and free() methods
Introduce new generic alloc and free methods with attributes argument.
Existing alloc_coherent and free_coherent can be implemented on top of the
new calls with NULL attributes argument. Later also dma_alloc_non_coherent
can be implemented using DMA_ATTR_NONCOHERENT attribute as well as
dma_alloc_writecombine with separate DMA_ATTR_WRITECOMBINE attribute.
This way the drivers will get more generic, platform independent way of
allocating dma buffers with specific parameters.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: David Gibson <david@gibson.dropbear.ud.au>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
| -rw-r--r-- | include/linux/dma-mapping.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index e13117cbd2f7..8cc7f95289ac 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -13,6 +13,12 @@ struct dma_map_ops { dma_addr_t *dma_handle, gfp_t gfp); void (*free_coherent)(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle); + void* (*alloc)(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp, + struct dma_attrs *attrs); + void (*free)(struct device *dev, size_t size, + void *vaddr, dma_addr_t dma_handle, + struct dma_attrs *attrs); dma_addr_t (*map_page)(struct device *dev, struct page *page, unsigned long offset, size_t size, enum dma_data_direction dir, |