common: dma-mapping: introduce mmap method

Introduce new generic mmap method with attributes argument.

This method lets drivers to create a userspace mapping for a DMA buffer
in generic, architecture independent way.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 2fc413a873ea..b903a20867f7 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -15,6 +15,9 @@ struct dma_map_ops {
         void (*free)(struct device *dev, size_t size,
                               void *vaddr, dma_addr_t dma_handle,
                               struct dma_attrs *attrs);
+        int (*mmap)(struct device *, struct vm_area_struct *,
+                          void *, dma_addr_t, size_t, 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,