dma-mapping.h

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#ifndef _M68K_DMA_MAPPING_H
#define _M68K_DMA_MAPPING_H

#include <asm/cache.h>

struct scatterlist;

#ifndef CONFIG_MMU_SUN3
static inline int dma_supported(struct device *dev, u64 mask)
{
    return 1;
}

static inline int dma_set_mask(struct device *dev, u64 mask)
{
    return 0;
}

extern void *dma_alloc_coherent(struct device *, size_t,
                dma_addr_t *, gfp_t);
extern void dma_free_coherent(struct device *, size_t,
                  void *, dma_addr_t);

static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
                      dma_addr_t *handle, gfp_t flag)
{
    return dma_alloc_coherent(dev, size, handle, flag);
}
static inline void dma_free_noncoherent(struct device *dev, size_t size,
                    void *addr, dma_addr_t handle)
{
    dma_free_coherent(dev, size, addr, handle);
}
static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
                  enum dma_data_direction dir)
{
    /* we use coherent allocation, so not much to do here. */
}

extern dma_addr_t dma_map_single(struct device *, void *, size_t,
                 enum dma_data_direction);
static inline void dma_unmap_single(struct device *dev, dma_addr_t addr,
                    size_t size, enum dma_data_direction dir)
{
}

extern dma_addr_t dma_map_page(struct device *, struct page *,
                   unsigned long, size_t size,
                   enum dma_data_direction);
static inline void dma_unmap_page(struct device *dev, dma_addr_t address,
                  size_t size, enum dma_data_direction dir)
{
}

extern int dma_map_sg(struct device *, struct scatterlist *, int,
              enum dma_data_direction);
static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
                int nhwentries, enum dma_data_direction dir)
{
}

extern void dma_sync_single_for_device(struct device *, dma_addr_t, size_t,
                       enum dma_data_direction);
extern void dma_sync_sg_for_device(struct device *, struct scatterlist *, int,
                   enum dma_data_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)
{
    /* just sync everything for now */
    dma_sync_single_for_device(dev, dma_handle, offset + size, direction);
}

static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle,
                       size_t size, enum dma_data_direction dir)
{
}

static inline void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
                       int nents, enum dma_data_direction dir)
{
}

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)
{
    /* just sync everything for now */
    dma_sync_single_for_cpu(dev, dma_handle, offset + size, direction);
}

static inline int dma_mapping_error(struct device *dev, dma_addr_t handle)
{
    return 0;
}

#else
#include <asm-generic/dma-mapping-broken.h>
#endif

#endif  /* _M68K_DMA_MAPPING_H */