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ARM: dma-mapping: define dma_(un)?map_single in terms of dma_(un)?map_page

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Use dma_map_page()/dma_unmap_page() internals to handle dma_map_single()
and dma_unmap_single().

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2011-07-03 16:13:58 +01:00
parent 178783622c
commit 8021a4a048
2 changed files with 9 additions and 50 deletions
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28
arch/arm/common/dmabounce.c
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@@ -328,34 +328,6 @@ static inline void unmap_single(struct device *dev, dma_addr_t dma_addr,
* substitute the safe buffer for the unsafe one.
* (basically move the buffer from an unsafe area to a safe one)
*/
dma_addr_t __dma_map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction dir)
{
dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
__func__, ptr, size, dir);
BUG_ON(!valid_dma_direction(dir));
return map_single(dev, ptr, size, dir);
}
EXPORT_SYMBOL(__dma_map_single);
/*
* see if a mapped address was really a "safe" buffer and if so, copy
* the data from the safe buffer back to the unsafe buffer and free up
* the safe buffer. (basically return things back to the way they
* should be)
*/
void __dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir)
{
dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
__func__, (void *) dma_addr, size, dir);
unmap_single(dev, dma_addr, size, dir);
}
EXPORT_SYMBOL(__dma_unmap_single);
dma_addr_t __dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction dir)
{