linux-kernel - [PATCH 1/8] add map_page and unmap_page to struct dma_mapping

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Date:	Mon,  5 Jan 2009 23:47:21 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	mingo@...e.hu
Cc:	linux-kernel@...r.kernel.org,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Subject: [PATCH 1/8] add map_page and unmap_page to struct dma_mapping_ops

This patch adds map_page and unmap_page to struct dma_mapping_ops.

This is a preparation of struct dma_mapping_ops unification. We use
map_page and unmap_page instead of map_single and unmap_single.

We will remove map_single and unmap_single hooks in the last patch in
this patchset.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
---
 arch/x86/include/asm/dma-mapping.h |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h
index e93265c..2f89d2e 100644
--- a/arch/x86/include/asm/dma-mapping.h
+++ b/arch/x86/include/asm/dma-mapping.h
@@ -8,6 +8,7 @@
 
 #include <linux/kmemcheck.h>
 #include <linux/scatterlist.h>
+#include <linux/dma-attrs.h>
 #include <asm/io.h>
 #include <asm/swiotlb.h>
 #include <asm-generic/dma-coherent.h>
@@ -51,6 +52,13 @@ struct dma_mapping_ops {
 	void            (*unmap_sg)(struct device *hwdev,
 				struct scatterlist *sg, int nents,
 				int direction);
+	dma_addr_t	(*map_page)(struct device *dev, struct page *page,
+				    unsigned long offset, size_t size,
+				    enum dma_data_direction dir,
+				    struct dma_attrs *attrs);
+	void 		(*unmap_page)(struct device *dev, dma_addr_t dma_handle,
+				      size_t size, enum dma_data_direction dir,
+				      struct dma_attrs *attrs);
 	int             (*dma_supported)(struct device *hwdev, u64 mask);
 	int		is_phys;
 };
-- 
1.6.0.6

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