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
  15extern struct dma_map_ops *dma_ops;
  16extern struct ia64_machine_vector ia64_mv;
  17extern void set_iommu_machvec(void);
  18
  19extern void machvec_dma_sync_single(struct device *, dma_addr_t, size_t,
  20                                    enum dma_data_direction);
  21extern void machvec_dma_sync_sg(struct device *, struct scatterlist *, int,
  22                                enum dma_data_direction);
  23
  24static inline void *dma_alloc_coherent(struct device *dev, size_t size,
  25                                       dma_addr_t *daddr, gfp_t gfp)
  26{
  27        struct dma_map_ops *ops = platform_dma_get_ops(dev);
  28        void *caddr;
  29
  30        caddr = ops->alloc_coherent(dev, size, daddr, gfp);
  31        debug_dma_alloc_coherent(dev, size, *daddr, caddr);
  32        return caddr;
  33}
  34
  35static inline void dma_free_coherent(struct device *dev, size_t size,
  36                                     void *caddr, dma_addr_t daddr)
  37{
  38        struct dma_map_ops *ops = platform_dma_get_ops(dev);
  39        debug_dma_free_coherent(dev, size, caddr, daddr);
  40        ops->free_coherent(dev, size, caddr, daddr);
  41}
  42
  43#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
  44#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
  45
  46#define get_dma_ops(dev) platform_dma_get_ops(dev)
  47
  48#include <asm-generic/dma-mapping-common.h>
  49
  50static inline int dma_mapping_error(struct device *dev, dma_addr_t daddr)
  51{
  52        struct dma_map_ops *ops = platform_dma_get_ops(dev);
  53        return ops->mapping_error(dev, daddr);
  54}
  55
  56static inline int dma_supported(struct device *dev, u64 mask)
  57{
  58        struct dma_map_ops *ops = platform_dma_get_ops(dev);
  59        return ops->dma_supported(dev, mask);
  60}
  61
  62static inline int
  63dma_set_mask (struct device *dev, u64 mask)
  64{
  65        if (!dev->dma_mask || !dma_supported(dev, mask))
  66                return -EIO;
  67        *dev->dma_mask = mask;
  68        return 0;
  69}
  70
  71static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
  72{
  73        if (!dev->dma_mask)
  74                return 0;
  75
  76        return addr + size <= *dev->dma_mask;
  77}
  78
  79static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
  80{
  81        return paddr;
  82}
  83
  84static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
  85{
  86        return daddr;
  87}
  88
  89extern int dma_get_cache_alignment(void);
  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#define dma_is_consistent(d, h) (1)     /* all we do is coherent memory... */
 103
 104#endif /* _ASM_IA64_DMA_MAPPING_H */
 105