kernel-ark/arch/xtensa/include/asm/dma-mapping.h
Chris Zankel 367b8112fe xtensa: move headers files to arch/xtensa/include
Move all header files for xtensa to arch/xtensa/include and platform and
variant header files to the appropriate arch/xtensa/platforms/ and
arch/xtensa/variants/ directories.

Moving the files gets also rid of all uses of symlinks in the Makefile.

This has been completed already for the majority of the architectures
and xtensa is one out of six missing.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Chris Zankel <chris@zankel.net>
2008-11-06 10:25:09 -08:00

180 lines
4.3 KiB
C

/*
* include/asm-xtensa/dma-mapping.h
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2003 - 2005 Tensilica Inc.
*/
#ifndef _XTENSA_DMA_MAPPING_H
#define _XTENSA_DMA_MAPPING_H
#include <asm/cache.h>
#include <asm/io.h>
#include <linux/mm.h>
#include <linux/scatterlist.h>
/*
* DMA-consistent mapping functions.
*/
extern void *consistent_alloc(int, size_t, dma_addr_t, unsigned long);
extern void consistent_free(void*, size_t, dma_addr_t);
extern void consistent_sync(void*, size_t, int);
#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, gfp_t flag);
void dma_free_coherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle);
static inline dma_addr_t
dma_map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
consistent_sync(ptr, size, direction);
return virt_to_phys(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);
}
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++ ) {
BUG_ON(!sg_page(sg));
sg->dma_address = sg_phys(sg);
consistent_sync(sg_virt(sg), sg->length, direction);
}
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)
{
BUG_ON(direction == DMA_NONE);
return (dma_addr_t)(page_to_pfn(page)) * PAGE_SIZE + 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);
}
static inline void
dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
static inline void
dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
enum dma_data_direction direction)
{
consistent_sync((void *)bus_to_virt(dma_handle), size, direction);
}
static inline void
dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
enum dma_data_direction direction)
{
consistent_sync((void *)bus_to_virt(dma_handle), size, direction);
}
static inline void
dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
consistent_sync((void *)bus_to_virt(dma_handle)+offset,size,direction);
}
static inline void
dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
consistent_sync((void *)bus_to_virt(dma_handle)+offset,size,direction);
}
static inline void
dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
enum dma_data_direction dir)
{
int i;
for (i = 0; i < nelems; i++, sg++)
consistent_sync(sg_virt(sg), sg->length, dir);
}
static inline void
dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
enum dma_data_direction dir)
{
int i;
for (i = 0; i < nelems; i++, sg++)
consistent_sync(sg_virt(sg), sg->length, dir);
}
static inline int
dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return 0;
}
static inline int
dma_supported(struct device *dev, u64 mask)
{
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)
{
return L1_CACHE_BYTES;
}
#define dma_is_consistent(d, h) (1)
static inline void
dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
{
consistent_sync(vaddr, size, direction);
}
#endif /* _XTENSA_DMA_MAPPING_H */