arch/c6x/include/asm/dma-mapping.h

   1 /*
   2  *  Port on Texas Instruments TMS320C6x architecture
   3  *
   4  *  Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
   5  *  Author: Aurelien Jacquiot <aurelien.jacquiot@ti.com>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  */
  12 #ifndef _ASM_C6X_DMA_MAPPING_H
  13 #define _ASM_C6X_DMA_MAPPING_H
  14
  15 #include <linux/dma-debug.h>
  16 #include <asm-generic/dma-coherent.h>
  17
  18 #define dma_supported(d, m)     1
  19
  20 static inline int dma_set_mask(struct device *dev, u64 dma_mask)
  21 {
  22         if (!dev->dma_mask || !dma_supported(dev, dma_mask))
  23                 return -EIO;
  24
  25         *dev->dma_mask = dma_mask;
  26
  27         return 0;
  28 }
  29
  30 /*
  31  * DMA errors are defined by all-bits-set in the DMA address.
  32  */
  33 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
  34 {
  35         debug_dma_mapping_error(dev, dma_addr);
  36         return dma_addr == ~0;
  37 }
  38
  39 extern dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
  40                                  size_t size, enum dma_data_direction dir);
  41
  42 extern void dma_unmap_single(struct device *dev, dma_addr_t handle,
  43                              size_t size, enum dma_data_direction dir);
  44
  45 extern int dma_map_sg(struct device *dev, struct scatterlist *sglist,
  46                       int nents, enum dma_data_direction direction);
  47
  48 extern void dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
  49                          int nents, enum dma_data_direction direction);
  50
  51 static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
  52                                       unsigned long offset, size_t size,
  53                                       enum dma_data_direction dir)
  54 {
  55         dma_addr_t handle;
  56
  57         handle = dma_map_single(dev, page_address(page) + offset, size, dir);
  58
  59         debug_dma_map_page(dev, page, offset, size, dir, handle, false);
  60
  61         return handle;
  62 }
  63
  64 static inline void dma_unmap_page(struct device *dev, dma_addr_t handle,
  65                 size_t size, enum dma_data_direction dir)
  66 {
  67         dma_unmap_single(dev, handle, size, dir);
  68
  69         debug_dma_unmap_page(dev, handle, size, dir, false);
  70 }
  71
  72 extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle,
  73                                     size_t size, enum dma_data_direction dir);
  74
  75 extern void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
  76                                        size_t size,
  77                                        enum dma_data_direction dir);
  78
  79 extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
  80                                 int nents, enum dma_data_direction dir);
  81
  82 extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
  83                                    int nents, enum dma_data_direction dir);
  84
  85 extern void coherent_mem_init(u32 start, u32 size);
  86 extern void *dma_alloc_coherent(struct device *, size_t, dma_addr_t *, gfp_t);
  87 extern void dma_free_coherent(struct device *, size_t, void *, dma_addr_t);
  88
  89 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent((d), (s), (h), (f))
  90 #define dma_free_noncoherent(d, s, v, h)  dma_free_coherent((d), (s), (v), (h))
  91
  92 /* Not supported for now */
  93 static inline int dma_mmap_coherent(struct device *dev,
  94                                     struct vm_area_struct *vma, void *cpu_addr,
  95                                     dma_addr_t dma_addr, size_t size)
  96 {
  97         return -EINVAL;
  98 }
  99
 100 static inline int dma_get_sgtable(struct device *dev, struct sg_table *sgt,
 101                                   void *cpu_addr, dma_addr_t dma_addr,
 102                                   size_t size)
 103 {
 104         return -EINVAL;
 105 }
 106
 107 #endif  /* _ASM_C6X_DMA_MAPPING_H */