arch/s390/include/asm/dma-mapping.h

   1 #ifndef _ASM_S390_DMA_MAPPING_H
   2 #define _ASM_S390_DMA_MAPPING_H
   3
   4 #include <linux/kernel.h>
   5 #include <linux/types.h>
   6 #include <linux/mm.h>
   7 #include <linux/scatterlist.h>
   8 #include <linux/dma-debug.h>
   9 #include <linux/io.h>
  10
  11 #define DMA_ERROR_CODE          (~(dma_addr_t) 0x0)
  12
  13 extern struct dma_map_ops s390_pci_dma_ops;
  14
  15 static inline struct dma_map_ops *get_dma_ops(struct device *dev)
  16 {
  17         if (dev && dev->archdata.dma_ops)
  18                 return dev->archdata.dma_ops;
  19         return &dma_noop_ops;
  20 }
  21
  22 static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
  23                                   enum dma_data_direction direction)
  24 {
  25 }
  26
  27 static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
  28 {
  29         if (!dev->dma_mask)
  30                 return false;
  31         return addr + size - 1 <= *dev->dma_mask;
  32 }
  33
  34 #endif /* _ASM_S390_DMA_MAPPING_H */