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 <asm-generic/dma-coherent.h>
  17
  18 #include <linux/mm.h>
  19 #include <linux/scatterlist.h>
  20
  21 #define DMA_ERROR_CODE          (~(dma_addr_t)0x0)
  22
  23 extern struct dma_map_ops xtensa_dma_map_ops;
  24
  25 static inline struct dma_map_ops *get_dma_ops(struct device *dev)
  26 {
  27         if (dev && dev->archdata.dma_ops)
  28                 return dev->archdata.dma_ops;
  29         else
  30                 return &xtensa_dma_map_ops;
  31 }
  32
  33 #include <asm-generic/dma-mapping-common.h>
  34
  35 void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
  36                     enum dma_data_direction direction);
  37
  38 static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
  39 {
  40         return (dma_addr_t)paddr;
  41 }
  42
  43 static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
  44 {
  45         return (phys_addr_t)daddr;
  46 }
  47
  48 #endif  /* _XTENSA_DMA_MAPPING_H */