You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
157 lines
3.9 KiB
157 lines
3.9 KiB
/*
|
|
* Copyright 2004-2009 Analog Devices Inc.
|
|
*
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
#ifndef _BLACKFIN_DMA_MAPPING_H
|
|
#define _BLACKFIN_DMA_MAPPING_H
|
|
|
|
#include <asm/cacheflush.h>
|
|
struct scatterlist;
|
|
|
|
void *dma_alloc_coherent(struct device *dev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t gfp);
|
|
void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
|
|
dma_addr_t dma_handle);
|
|
|
|
/*
|
|
* Now for the API extensions over the pci_ one
|
|
*/
|
|
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
|
|
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
|
|
#define dma_supported(d, m) (1)
|
|
|
|
static inline int
|
|
dma_set_mask(struct device *dev, u64 dma_mask)
|
|
{
|
|
if (!dev->dma_mask || !dma_supported(dev, dma_mask))
|
|
return -EIO;
|
|
|
|
*dev->dma_mask = dma_mask;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int
|
|
dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
extern void
|
|
__dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir);
|
|
static inline void
|
|
__dma_sync_inline(dma_addr_t addr, size_t size, enum dma_data_direction dir)
|
|
{
|
|
switch (dir) {
|
|
case DMA_NONE:
|
|
BUG();
|
|
case DMA_TO_DEVICE: /* writeback only */
|
|
flush_dcache_range(addr, addr + size);
|
|
break;
|
|
case DMA_FROM_DEVICE: /* invalidate only */
|
|
case DMA_BIDIRECTIONAL: /* flush and invalidate */
|
|
/* Blackfin has no dedicated invalidate (it includes a flush) */
|
|
invalidate_dcache_range(addr, addr + size);
|
|
break;
|
|
}
|
|
}
|
|
static inline void
|
|
_dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir)
|
|
{
|
|
if (__builtin_constant_p(dir))
|
|
__dma_sync_inline(addr, size, dir);
|
|
else
|
|
__dma_sync(addr, size, dir);
|
|
}
|
|
|
|
static inline dma_addr_t
|
|
dma_map_single(struct device *dev, void *ptr, size_t size,
|
|
enum dma_data_direction dir)
|
|
{
|
|
_dma_sync((dma_addr_t)ptr, size, dir);
|
|
return (dma_addr_t) ptr;
|
|
}
|
|
|
|
static inline dma_addr_t
|
|
dma_map_page(struct device *dev, struct page *page,
|
|
unsigned long offset, size_t size,
|
|
enum dma_data_direction dir)
|
|
{
|
|
return dma_map_single(dev, page_address(page) + offset, size, dir);
|
|
}
|
|
|
|
static inline void
|
|
dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
|
|
enum dma_data_direction dir)
|
|
{
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
}
|
|
|
|
static inline void
|
|
dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
|
|
enum dma_data_direction dir)
|
|
{
|
|
dma_unmap_single(dev, dma_addr, size, dir);
|
|
}
|
|
|
|
extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
|
|
enum dma_data_direction dir);
|
|
|
|
static inline void
|
|
dma_unmap_sg(struct device *dev, struct scatterlist *sg,
|
|
int nhwentries, enum dma_data_direction dir)
|
|
{
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
}
|
|
|
|
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)
|
|
{
|
|
BUG_ON(!valid_dma_direction(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)
|
|
{
|
|
_dma_sync(handle + offset, size, dir);
|
|
}
|
|
|
|
static inline void
|
|
dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, size_t size,
|
|
enum dma_data_direction 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)
|
|
{
|
|
dma_sync_single_range_for_device(dev, handle, 0, size, dir);
|
|
}
|
|
|
|
static inline void
|
|
dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nents,
|
|
enum dma_data_direction dir)
|
|
{
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
}
|
|
|
|
extern void
|
|
dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
|
|
int nents, enum dma_data_direction dir);
|
|
|
|
static inline void
|
|
dma_cache_sync(struct device *dev, void *vaddr, size_t size,
|
|
enum dma_data_direction dir)
|
|
{
|
|
_dma_sync((dma_addr_t)vaddr, size, dir);
|
|
}
|
|
|
|
#endif /* _BLACKFIN_DMA_MAPPING_H */
|
|
|