From 613c4578d4079a14dbee76ef7e0c80f635522fe3 Mon Sep 17 00:00:00 2001 From: Marek Szyprowski Date: Wed, 28 Mar 2012 16:36:27 +0200 Subject: [PATCH] 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 Acked-by: Kyungmin Park Reviewed-by: David Gibson Reviewed-by: Arnd Bergmann --- include/linux/dma-mapping.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index e13117cbd2f..8cc7f95289a 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,