arch/arm64/include/asm/xen/page-coherent.h

   1 #ifndef _ASM_ARM64_XEN_PAGE_COHERENT_H
   2 #define _ASM_ARM64_XEN_PAGE_COHERENT_H
   3
   4 #include <asm/page.h>
   5 #include <linux/dma-attrs.h>
   6 #include <linux/dma-mapping.h>
   7
   8 static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size,
   9                 dma_addr_t *dma_handle, gfp_t flags,
  10                 struct dma_attrs *attrs)
  11 {
  12         return __generic_dma_ops(hwdev)->alloc(hwdev, size, dma_handle, flags, attrs);
  13 }
  14
  15 static inline void xen_free_coherent_pages(struct device *hwdev, size_t size,
  16                 void *cpu_addr, dma_addr_t dma_handle,
  17                 struct dma_attrs *attrs)
  18 {
  19         __generic_dma_ops(hwdev)->free(hwdev, size, cpu_addr, dma_handle, attrs);
  20 }
  21
  22 static inline void xen_dma_map_page(struct device *hwdev, struct page *page,
  23              unsigned long offset, size_t size, enum dma_data_direction dir,
  24              struct dma_attrs *attrs)
  25 {
  26 }
  27
  28 static inline void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
  29                 size_t size, enum dma_data_direction dir,
  30                 struct dma_attrs *attrs)
  31 {
  32 }
  33
  34 static inline void xen_dma_sync_single_for_cpu(struct device *hwdev,
  35                 dma_addr_t handle, size_t size, enum dma_data_direction dir)
  36 {
  37 }
  38
  39 static inline void xen_dma_sync_single_for_device(struct device *hwdev,
  40                 dma_addr_t handle, size_t size, enum dma_data_direction dir)
  41 {
  42 }
  43 #endif /* _ASM_ARM64_XEN_PAGE_COHERENT_H */