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

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2003 - 2005 Tensilica Inc.
   7  * Copyright (C) 2015 Cadence Design Systems Inc.
   8  */
   9
  10 #ifndef _XTENSA_DMA_MAPPING_H
  11 #define _XTENSA_DMA_MAPPING_H
  12
  13 #include <asm/cache.h>
  14 #include <asm/io.h>
  15
  16 #include <linux/mm.h>
  17 #include <linux/scatterlist.h>
  18
  19 #define DMA_ERROR_CODE          (~(dma_addr_t)0x0)
  20
  21 extern struct dma_map_ops xtensa_dma_map_ops;
  22
  23 static inline struct dma_map_ops *get_dma_ops(struct device *dev)
  24 {
  25         if (dev && dev->archdata.dma_ops)
  26                 return dev->archdata.dma_ops;
  27         else
  28                 return &xtensa_dma_map_ops;
  29 }
  30
  31 void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
  32                     enum dma_data_direction direction);
  33
  34 static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
  35 {
  36         return (dma_addr_t)paddr;
  37 }
  38
  39 static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
  40 {
  41         return (phys_addr_t)daddr;
  42 }
  43
  44 #endif  /* _XTENSA_DMA_MAPPING_H */