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arm: dma mapping: Export a dma ops function arm_dma_set_mask

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Expose another DMA operations function: arm_dma_set_mask. This
function will be added to a custom DMA ops for Armada 370/XP.
Depending of its configuration Armada 370/XP can be set as a "nearly"
coherent architecture. In this case the DMA ops is made of:
- specific functions for this architecture
- already exposed arm DMA related functions
- the arm_dma_set_mask which was not exposed yet.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
This commit is contained in:
Gregory CLEMENT 2012-11-21 09:39:19 +01:00
parent 45f5984a8a
commit 87b54e786a
2 changed files with 3 additions and 3 deletions
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2
arch/arm/include/asm/dma-mapping.h
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@ -111,6 +111,8 @@ static inline void dma_free_noncoherent(struct device *dev, size_t size,
extern int dma_supported(struct device *dev, u64 mask); extern int dma_supported(struct device *dev, u64 mask);
extern int arm_dma_set_mask(struct device *dev, u64 dma_mask);
/** /**
* arm_dma_alloc - allocate consistent memory for DMA * arm_dma_alloc - allocate consistent memory for DMA
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices

4
arch/arm/mm/dma-mapping.c
View File

@ -124,8 +124,6 @@ static void arm_dma_sync_single_for_device(struct device *dev,
__dma_page_cpu_to_dev(page, offset, size, dir); __dma_page_cpu_to_dev(page, offset, size, dir);
} }
static int arm_dma_set_mask(struct device *dev, u64 dma_mask);
struct dma_map_ops arm_dma_ops = { struct dma_map_ops arm_dma_ops = {
.alloc = arm_dma_alloc, .alloc = arm_dma_alloc,
.free = arm_dma_free, .free = arm_dma_free,
@ -971,7 +969,7 @@ int dma_supported(struct device *dev, u64 mask)
} }
EXPORT_SYMBOL(dma_supported); EXPORT_SYMBOL(dma_supported);
static int arm_dma_set_mask(struct device *dev, u64 dma_mask) int arm_dma_set_mask(struct device *dev, u64 dma_mask)
{ {
if (!dev->dma_mask || !dma_supported(dev, dma_mask)) if (!dev->dma_mask || !dma_supported(dev, dma_mask))
return -EIO; return -EIO;