[PATCH 12/14] common: dma-mapping: introduce mmap method
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- To: linux-kernel@xxxxxxxxxxxxxxx
- Subject: [PATCH 12/14] common: dma-mapping: introduce mmap method
- From: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
- Date: Fri, 23 Dec 2011 13:27:31 +0100
- Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>, microblaze-uclinux@xxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, x86@xxxxxxxxxx, linux-sh@xxxxxxxxxxxxxxx, linux-alpha@xxxxxxxxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxx, discuss@xxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linaro-mm-sig@xxxxxxxxxxxxxxxx, Jonathan Corbet <corbet@xxxxxxx>, Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>, Kyungmin Park <kyungmin.park@xxxxxxxxxxx>, Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxx>
- In-reply-to: <1324643253-3024-1-git-send-email-m.szyprowski@samsung.com>
- List-id: <linux-ia64.vger.kernel.org>
- References: <1324643253-3024-1-git-send-email-m.szyprowski@samsung.com>
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@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
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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