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[ARM] dma-mapping: provide sync_range APIs

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Convert the existing dma_sync_single_for_* APIs to the new range based
APIs, and make the dma_sync_single_for_* API a superset of it.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2008-08-10 12:18:26 +01:00
committed by Russell King
parent 98ed7d4b1a
commit 9dd4286805
2 changed files with 48 additions and 29 deletions
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39
arch/arm/include/asm/dma-mapping.h
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@ -351,11 +351,12 @@ extern void dma_unmap_sg(struct device *, struct scatterlist *, int, enum dma_da
/**
* dma_sync_single_for_cpu
* dma_sync_single_range_for_cpu
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
* @handle: DMA address of buffer
* @size: size of buffer to map
* @dir: DMA transfer direction
* @offset: offset of region to start sync
* @size: size of region to sync
* @dir: DMA transfer direction (same as passed to dma_map_single)
*
* Make physical memory consistent for a single streaming mode DMA
* translation after a transfer.
@ -368,25 +369,41 @@ extern void dma_unmap_sg(struct device *, struct scatterlist *, int, enum dma_da
* device again owns the buffer.
*/
#ifndef CONFIG_DMABOUNCE
static inline void
dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t handle,
unsigned long offset, size_t size,
enum dma_data_direction dir)
{
if (!arch_is_coherent())
dma_cache_maint(dma_to_virt(dev, handle) + offset, size, dir);
}
static inline void
dma_sync_single_range_for_device(struct device *dev, dma_addr_t handle,
unsigned long offset, size_t size,
enum dma_data_direction dir)
{
if (!arch_is_coherent())
dma_cache_maint(dma_to_virt(dev, handle) + offset, size, dir);
}
#else
extern void dma_sync_single_range_for_cpu(struct device *, dma_addr_t, unsigned long, size_t, enum dma_data_direction);
extern void dma_sync_single_range_for_device(struct device *, dma_addr_t, unsigned long, size_t, enum dma_data_direction);
#endif
static inline void
dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, size_t size,
enum dma_data_direction dir)
{
if (!arch_is_coherent())
dma_cache_maint(dma_to_virt(dev, handle), size, dir);
dma_sync_single_range_for_cpu(dev, handle, 0, size, dir);
}
static inline void
dma_sync_single_for_device(struct device *dev, dma_addr_t handle, size_t size,
enum dma_data_direction dir)
{
if (!arch_is_coherent())
dma_cache_maint(dma_to_virt(dev, handle), size, dir);
dma_sync_single_range_for_device(dev, handle, 0, size, dir);
}
#else
extern void dma_sync_single_for_cpu(struct device*, dma_addr_t, size_t, enum dma_data_direction);
extern void dma_sync_single_for_device(struct device*, dma_addr_t, size_t, enum dma_data_direction);
#endif
/**