/*
* Copyright 2010 Tilera Corporation. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for
* more details.
*/
#ifndef _ASM_TILE_DMA_MAPPING_H
#define _ASM_TILE_DMA_MAPPING_H
#include <linux/mm.h>
#include <linux/scatterlist.h>
#include <linux/cache.h>
#include <linux/io.h>
/*
* Note that on x86 and powerpc, there is a "struct dma_mapping_ops"
* that is used for all the DMA operations. For now, we don't have an
* equivalent on tile, because we only have a single way of doing DMA.
* (Tilera bug 7994 to use dma_mapping_ops.)
*/
#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)
extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction);
extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
size_t size, enum dma_data_direction);
extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction);
extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
int nhwentries, enum dma_data_direction);
extern dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction);
extern void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
size_t size, enum dma_data_direction);
extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
int nelems, enum dma_data_direction);
extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
int nelems, enum dma_data_direction);
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);
extern void dma_sync_single_for_cpu(struct device *, dma_addr_t, size_t,
enum dma_data_direction);
extern void dma_sync_single_for_device(struct device *, dma_addr_t,
size_t, enum dma_data_direction);
extern void dma_sync_single_range_for_cpu(struct device *, dma_addr_t,
unsigned long offset, size_t,
enum dma_data_direction);
extern void dma_sync_single_range_for_device(struct device *, dma_addr_t,
unsigned long offset, size_t,
enum dma_data_direction);
extern void dma_cache_sync(void *vaddr, size_t, enum dma_data_direction);
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;
}
#endif /* _ASM_TILE_DMA_MAPPING_H */
