Patchwork [12/14] common: dma-mapping: introduce mmap method

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Submitter Marek Szyprowski
Date Dec. 23, 2011, 12:27 p.m.
Message ID <1324643253-3024-13-git-send-email-m.szyprowski@samsung.com>
Download mbox | patch
Permalink /patch/133036/
State Not Applicable
Delegated to: David Miller
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Comments

Marek Szyprowski - Dec. 23, 2011, 12:27 p.m.
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>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
 include/linux/dma-mapping.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

Patch

diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 2fc413a..b903a20 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,