LXR linux/arch/ia64/include/asm/dma-mapping.h

   1#ifndef _ASM_IA64_DMA_MAPPING_H
   2#define _ASM_IA64_DMA_MAPPING_H
   3
   4/*
   5 * Copyright (C) 2003-2004 Hewlett-Packard Co
   6 *      David Mosberger-Tang <davidm@hpl.hp.com>
   7 */
   8#include <asm/machvec.h>
   9#include <linux/scatterlist.h>
  10#include <asm/swiotlb.h>
  11#include <linux/dma-debug.h>
  12
  13#define ARCH_HAS_DMA_GET_REQUIRED_MASK
  14
  15#define DMA_ERROR_CODE 0
  16
  17extern struct dma_map_ops *dma_ops;
  18extern struct ia64_machine_vector ia64_mv;
  19extern void set_iommu_machvec(void);
  20
  21extern void machvec_dma_sync_single(struct device *, dma_addr_t, size_t,
  22                                    enum dma_data_direction);
  23extern void machvec_dma_sync_sg(struct device *, struct scatterlist *, int,
  24                                enum dma_data_direction);
  25
  26static inline void *dma_alloc_coherent(struct device *dev, size_t size,
  27                                       dma_addr_t *daddr, gfp_t gfp)
  28{
  29        struct dma_map_ops *ops = platform_dma_get_ops(dev);
  30        void *caddr;
  31
  32        caddr = ops->alloc_coherent(dev, size, daddr, gfp);
  33        debug_dma_alloc_coherent(dev, size, *daddr, caddr);
  34        return caddr;
  35}
  36
  37static inline void dma_free_coherent(struct device *dev, size_t size,
  38                                     void *caddr, dma_addr_t daddr)
  39{
  40        struct dma_map_ops *ops = platform_dma_get_ops(dev);
  41        debug_dma_free_coherent(dev, size, caddr, daddr);
  42        ops->free_coherent(dev, size, caddr, daddr);
  43}
  44
  45#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
  46#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
  47
  48#define get_dma_ops(dev) platform_dma_get_ops(dev)
  49
  50#include <asm-generic/dma-mapping-common.h>
  51
  52static inline int dma_mapping_error(struct device *dev, dma_addr_t daddr)
  53{
  54        struct dma_map_ops *ops = platform_dma_get_ops(dev);
  55        return ops->mapping_error(dev, daddr);
  56}
  57
  58static inline int dma_supported(struct device *dev, u64 mask)
  59{
  60        struct dma_map_ops *ops = platform_dma_get_ops(dev);
  61        return ops->dma_supported(dev, mask);
  62}
  63
  64static inline int
  65dma_set_mask (struct device *dev, u64 mask)
  66{
  67        if (!dev->dma_mask || !dma_supported(dev, mask))
  68                return -EIO;
  69        *dev->dma_mask = mask;
  70        return 0;
  71}
  72
  73static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
  74{
  75        if (!dev->dma_mask)
  76                return 0;
  77
  78        return addr + size - 1 <= *dev->dma_mask;
  79}
  80
  81static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
  82{
  83        return paddr;
  84}
  85
  86static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
  87{
  88        return daddr;
  89}
  90
  91static inline void
  92dma_cache_sync (struct device *dev, void *vaddr, size_t size,
  93        enum dma_data_direction dir)
  94{
  95        /*
  96         * IA-64 is cache-coherent, so this is mostly a no-op.  However, we do need to
  97         * ensure that dma_cache_sync() enforces order, hence the mb().
  98         */
  99        mb();
 100}
 101
 102#endif /* _ASM_IA64_DMA_MAPPING_H */
 103