include/asm-x86/dma-mapping_32.h

   1 #ifndef _ASM_I386_DMA_MAPPING_H
   2 #define _ASM_I386_DMA_MAPPING_H
   3
   4 #include <linux/mm.h>
   5 #include <linux/scatterlist.h>
   6
   7 #include <asm/cache.h>
   8 #include <asm/io.h>
   9 #include <asm/bug.h>
  10
  11 static inline int
  12 dma_mapping_error(dma_addr_t dma_addr)
  13 {
  14         return 0;
  15 }
  16
  17 extern int forbid_dac;
  18
  19 static inline int
  20 dma_get_cache_alignment(void)
  21 {
  22         /* no easy way to get cache size on all x86, so return the
  23          * maximum possible, to be safe */
  24         return boot_cpu_data.x86_clflush_size;
  25 }
  26
  27 #define dma_is_consistent(d, h) (1)
  28
  29 #define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
  30 extern int
  31 dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
  32                             dma_addr_t device_addr, size_t size, int flags);
  33
  34 extern void
  35 dma_release_declared_memory(struct device *dev);
  36
  37 extern void *
  38 dma_mark_declared_memory_occupied(struct device *dev,
  39                                   dma_addr_t device_addr, size_t size);
  40
  41 #endif