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#ifndef _ASM_DMA_MAPPING_H
#define _ASM_DMA_MAPPING_H
#include <asm/cache.h>
#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)
void *dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, int flag);
void dma_free_coherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle);
#ifdef CONFIG_MAPPED_DMA_IO
extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction direction);
extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
size_t size, enum dma_data_direction direction);
extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction direction);
extern dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction direction);
extern void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
size_t size, enum dma_data_direction direction);
extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
int nhwentries, enum dma_data_direction direction);
extern void dma_sync_single(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction direction);
extern void dma_sync_single_range(struct device *dev, dma_addr_t dma_handle,
unsigned long offset, size_t size, enum dma_data_direction direction);
extern void dma_sync_sg(struct device *dev, struct scatterlist *sg, int nelems,
enum dma_data_direction direction);
#else
static inline dma_addr_t
dma_map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction direction)
{
unsigned long addr = (unsigned long) ptr;
BUG_ON(direction == DMA_NONE);
dma_cache_wback_inv(addr, size);
return bus_to_baddr(hwdev->bus, __pa(ptr));
}
static inline void
dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
if (direction != DMA_TO_DEVICE) {
unsigned long addr;
addr = baddr_to_bus(hwdev->bus, dma_addr) + PAGE_OFFSET;
dma_cache_wback_inv(addr, size);
}
}
static inline int
dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction direction)
{
int i;
BUG_ON(direction == DMA_NONE);
for (i = 0; i < nents; i++, sg++) {
unsigned long addr;
addr = (unsigned long) page_address(sg->page);
if (addr)
dma_cache_wback_inv(addr + sg->offset, sg->length);
sg->dma_address = (dma_addr_t) bus_to_baddr(hwdev->bus,
page_to_phys(sg->page) + sg->offset);
}
return nents;
}
static inline dma_addr_t
dma_map_page(struct device *dev, struct page *page, unsigned long offset,
size_t size, enum dma_data_direction direction)
{
unsigned long addr;
BUG_ON(direction == DMA_NONE);
addr = (unsigned long) page_address(page) + offset;
dma_cache_wback_inv(addr, size);
return bus_to_baddr(hwdev->bus, page_to_phys(page) + offset);
}
static inline void
dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
if (direction != DMA_TO_DEVICE) {
unsigned long addr;
addr = baddr_to_bus(hwdev->bus, dma_address) + PAGE_OFFSET;
dma_cache_wback_inv(addr, size);
}
}
static inline void
dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
enum dma_data_direction direction)
{
int i;
BUG_ON(direction == DMA_NONE);
if (direction == DMA_TO_DEVICE)
return;
for (i = 0; i < nhwentries; i++, sg++) {
unsigned long addr;
if (!sg->page)
BUG();
addr = (unsigned long) page_address(sg->page);
if (addr)
dma_cache_wback_inv(addr + sg->offset, sg->length);
}
}
static inline void
dma_sync_single(struct device *dev, dma_addr_t dma_handle, size_t size,
enum dma_data_direction direction)
{
unsigned long addr;
if (direction == DMA_NONE)
BUG();
addr = baddr_to_bus(hwdev->bus, dma_handle) + PAGE_OFFSET;
dma_cache_wback_inv(addr, size);
}
static inline void
dma_sync_single_range(struct device *dev, dma_addr_t dma_handle,
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
unsigned long addr;
if (direction == DMA_NONE)
BUG();
addr = baddr_to_bus(hwdev->bus, dma_handle) + PAGE_OFFSET;
dma_cache_wback_inv(addr, size);
}
static inline void
dma_sync_sg(struct device *dev, struct scatterlist *sg, int nelems,
enum dma_data_direction direction)
{
#ifdef CONFIG_NONCOHERENT_IO
int i;
#endif
if (direction == DMA_NONE)
BUG();
/* Make sure that gcc doesn't leave the empty loop body. */
#ifdef CONFIG_NONCOHERENT_IO
for (i = 0; i < nelems; i++, sg++)
dma_cache_wback_inv((unsigned long)page_address(sg->page),
sg->length);
#endif
}
#endif /* CONFIG_MAPPED_DMA_IO */
static inline int
dma_supported(struct device *dev, u64 mask)
{
/*
* we fall back to GFP_DMA when the mask isn't all 1s,
* so we can't guarantee allocations that must be
* within a tighter range than GFP_DMA..
*/
if (mask < 0x00ffffff)
return 0;
return 1;
}
static inline int
dma_set_mask(struct device *dev, u64 mask)
{
if(!dev->dma_mask || !dma_supported(dev, mask))
return -EIO;
*dev->dma_mask = mask;
return 0;
}
static inline int
dma_get_cache_alignment(void)
{
/* XXX Largest on any MIPS */
return 128;
}
#ifdef CONFIG_NONCOHERENT_IO
#define dma_is_consistent(d) (0)
#else
#define dma_is_consistent(d) (1)
#endif
static inline void
dma_cache_sync(void *vaddr, size_t size,
enum dma_data_direction direction)
{
dma_cache_wback_inv((unsigned long)vaddr, size);
}
#endif /* _ASM_DMA_MAPPING_H */
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