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authorMarek Szyprowski <m.szyprowski@samsung.com>2012-03-28 16:36:27 +0200
committerMarek Szyprowski <m.szyprowski@samsung.com>2012-03-28 16:36:27 +0200
commit613c4578d4079a14dbee76ef7e0c80f635522fe3 (patch)
treecd833ec1ae6f510153ffddb3ff3e22d2443b832d
parentc16fa4f2ad19908a47c63d8fa436a1178438c7e7 (diff)
downloadop-kernel-dev-613c4578d4079a14dbee76ef7e0c80f635522fe3.zip
op-kernel-dev-613c4578d4079a14dbee76ef7e0c80f635522fe3.tar.gz
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.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index e13117c..8cc7f95 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,
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