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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2009-05-14 16:23:10 +0000
committerDavid S. Miller <davem@davemloft.net>2009-06-16 04:56:45 -0700
commit797a75686528e9f6f9bfee2a719a00b47868c999 (patch)
tree98f5aadddd6b373e69719b95bb2fd68fbe1fe29f /arch/sparc/include
parent2e8fcfe2e51b2ee0fef3313e3c9ec25b9d6ed255 (diff)
sparc: use dma_map_page instead of dma_map_single
This patch converts dma_map_single and dma_unmap_single to use map_page and unmap_page respectively and removes unnecessary map_single and unmap_single. map_page can be used to implement map_single but the opposite is impossible. Having only dma_map_page in struct dma_ops is enough. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Tested-by: Robert Reif <reif@earthlink.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/include')
-rw-r--r--arch/sparc/include/asm/dma-mapping_64.h23
1 files changed, 12 insertions, 11 deletions
diff --git a/arch/sparc/include/asm/dma-mapping_64.h b/arch/sparc/include/asm/dma-mapping_64.h
index 0c4fb1f81ca..579757e00a2 100644
--- a/arch/sparc/include/asm/dma-mapping_64.h
+++ b/arch/sparc/include/asm/dma-mapping_64.h
@@ -9,12 +9,12 @@ struct dma_ops {
dma_addr_t *dma_handle, gfp_t flag);
void (*free_coherent)(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t dma_handle);
- dma_addr_t (*map_single)(struct device *dev, void *cpu_addr,
- size_t size,
- enum dma_data_direction direction);
- void (*unmap_single)(struct device *dev, dma_addr_t dma_addr,
- size_t size,
- enum dma_data_direction direction);
+ dma_addr_t (*map_page)(struct device *dev, struct page *page,
+ unsigned long offset, size_t size,
+ enum dma_data_direction direction);
+ void (*unmap_page)(struct device *dev, dma_addr_t dma_addr,
+ size_t size,
+ enum dma_data_direction direction);
int (*map_sg)(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction direction);
void (*unmap_sg)(struct device *dev, struct scatterlist *sg,
@@ -51,29 +51,30 @@ static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
size_t size,
enum dma_data_direction direction)
{
- return dma_ops->map_single(dev, cpu_addr, size, direction);
+ return dma_ops->map_page(dev, virt_to_page(cpu_addr),
+ (unsigned long)cpu_addr & ~PAGE_MASK, size,
+ direction);
}
static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
size_t size,
enum dma_data_direction direction)
{
- dma_ops->unmap_single(dev, dma_addr, size, direction);
+ dma_ops->unmap_page(dev, dma_addr, size, direction);
}
static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
- return dma_ops->map_single(dev, page_address(page) + offset,
- size, direction);
+ return dma_ops->map_page(dev, page, offset, size, direction);
}
static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
size_t size,
enum dma_data_direction direction)
{
- dma_ops->unmap_single(dev, dma_address, size, direction);
+ dma_ops->unmap_page(dev, dma_address, size, direction);
}
static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,