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sh: Add dma-mapping support for dma_alloc/free_coherent() overrides.

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This moves the current dma_alloc/free_coherent() calls to a generic
variant and plugs them in for the nommu default. Other variants can
override the defaults in the dma mapping ops directly.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2009-10-26 09:50:51 +09:00
parent 73c926bee0
commit f32154c9b5
3 changed files with 47 additions and 25 deletions
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48
arch/sh/include/asm/dma-mapping.h
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@@ -9,6 +9,9 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev)
return dma_ops;
}
#include <asm-generic/dma-coherent.h>
#include <asm-generic/dma-mapping-common.h>
static inline int dma_supported(struct device *dev, u64 mask)
{
struct dma_map_ops *ops = get_dma_ops(dev);
@@ -33,12 +36,6 @@ static inline int dma_set_mask(struct device *dev, u64 mask)
return 0;
}
void *dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag);
void dma_free_coherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle);
void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction dir);
@@ -65,7 +62,42 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
return dma_addr == 0;
}
#include <asm-generic/dma-coherent.h>
#include <asm-generic/dma-mapping-common.h>
static inline void *dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp)
{
struct dma_map_ops *ops = get_dma_ops(dev);
void *memory;
if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
return memory;
if (!ops->alloc_coherent)
return NULL;
memory = ops->alloc_coherent(dev, size, dma_handle, gfp);
debug_dma_alloc_coherent(dev, size, *dma_handle, memory);
return memory;
}
static inline void dma_free_coherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle)
{
struct dma_map_ops *ops = get_dma_ops(dev);
WARN_ON(irqs_disabled()); /* for portability */
if (dma_release_from_coherent(dev, get_order(size), vaddr))
return;
debug_dma_free_coherent(dev, size, vaddr, dma_handle);
if (ops->free_coherent)
ops->free_coherent(dev, size, vaddr, dma_handle);
}
/* arch/sh/mm/consistent.c */
extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_addr, gfp_t flag);
extern void dma_generic_free_coherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle);
#endif /* __ASM_SH_DMA_MAPPING_H */