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

   1 /*
   2  * OpenRISC Linux
   3  *
   4  * Linux architectural port borrowing liberally from similar works of
   5  * others.  All original copyrights apply as per the original source
   6  * declaration.
   7  *
   8  * OpenRISC implementation:
   9  * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  */
  16
  17 #ifndef __ASM_OPENRISC_DMA_MAPPING_H
  18 #define __ASM_OPENRISC_DMA_MAPPING_H
  19
  20 /*
  21  * See Documentation/DMA-API-HOWTO.txt and
  22  * Documentation/DMA-API.txt for documentation.
  23  */
  24
  25 #include <linux/dma-debug.h>
  26 #include <linux/kmemcheck.h>
  27 #include <linux/dma-mapping.h>
  28
  29 #define DMA_ERROR_CODE          (~(dma_addr_t)0x0)
  30
  31 extern struct dma_map_ops or1k_dma_map_ops;
  32
  33 static inline struct dma_map_ops *get_dma_ops(struct device *dev)
  34 {
  35         return &or1k_dma_map_ops;
  36 }
  37
  38 #define HAVE_ARCH_DMA_SUPPORTED 1
  39 static inline int dma_supported(struct device *dev, u64 dma_mask)
  40 {
  41         /* Support 32 bit DMA mask exclusively */
  42         return dma_mask == DMA_BIT_MASK(32);
  43 }
  44
  45 #include <asm-generic/dma-mapping-common.h>
  46
  47 #endif  /* __ASM_OPENRISC_DMA_MAPPING_H */