linux-kernel - [PATCH 12/14] common: dma-mapping: introduce mmap method

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Date:	Fri, 23 Dec 2011 13:27:31 +0100
From:	Marek Szyprowski <m.szyprowski@...sung.com>
To:	linux-kernel@...r.kernel.org
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	microblaze-uclinux@...e.uq.edu.au, linux-arch@...r.kernel.org,
	x86@...nel.org, linux-sh@...r.kernel.org,
	linux-alpha@...r.kernel.org, sparclinux@...r.kernel.org,
	linux-ia64@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	linux-mips@...ux-mips.org, discuss@...-64.org,
	linux-arm-kernel@...ts.infradead.org, linux-mm@...ck.org,
	linaro-mm-sig@...ts.linaro.org, Jonathan Corbet <corbet@....net>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Andrzej Pietrasiewicz <andrzej.p@...sung.com>
Subject: [PATCH 12/14] 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@...sung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
---
 include/linux/dma-mapping.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

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,
-- 
1.7.1.569.g6f426

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