root/include/asm-cris/dma-mapping.h

INCLUDED FROM

DEFINITIONS

1. dma_alloc_coherent
2. dma_free_coherent
3. dma_map_single
4. dma_unmap_single
5. dma_map_sg
6. dma_map_page
7. dma_unmap_page
8. dma_unmap_sg
9. dma_sync_single_for_cpu
10. dma_sync_single_for_device
11. dma_sync_single_range_for_cpu
12. dma_sync_single_range_for_device
13. dma_sync_sg_for_cpu
14. dma_sync_sg_for_device
15. dma_mapping_error
16. dma_supported
17. dma_set_mask
18. dma_get_cache_alignment
19. dma_cache_sync

/* DMA mapping. Nothing tricky here, just virt_to_phys */

#ifndef _ASM_CRIS_DMA_MAPPING_H
#define _ASM_CRIS_DMA_MAPPING_H

#include <linux/mm.h>
#include <linux/kernel.h>

#include <asm/cache.h>
#include <asm/io.h>
#include <asm/scatterlist.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)

#ifdef CONFIG_PCI
#include <asm-generic/dma-coherent.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);
#else
static inline void *
dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
                   gfp_t flag)
{
        BUG();
        return NULL;
}

static inline void
dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
                    dma_addr_t dma_handle)
{
        BUG();
}
#endif
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);
        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)
{
        printk("Map sg\n");
        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 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);
}


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)
{
}

static inline void
dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
                        enum dma_data_direction 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)
{
}

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)
{
}

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

static inline void
dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
                    enum dma_data_direction 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)
{
        /*
         * 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)
{
        return (1 << INTERNODE_CACHE_SHIFT);
}

#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)
{
}


#endif