1 #ifndef _ASM_X86_XEN_PAGE_COHERENT_H
2 #define _ASM_X86_XEN_PAGE_COHERENT_H
5 #include <linux/dma-mapping.h>
7 static inline void *xen_alloc_coherent_pages(struct device
*hwdev
, size_t size
,
8 dma_addr_t
*dma_handle
, gfp_t flags
,
11 void *vstart
= (void*)__get_free_pages(flags
, get_order(size
));
12 *dma_handle
= virt_to_phys(vstart
);
16 static inline void xen_free_coherent_pages(struct device
*hwdev
, size_t size
,
17 void *cpu_addr
, dma_addr_t dma_handle
,
20 free_pages((unsigned long) cpu_addr
, get_order(size
));
23 static inline void xen_dma_map_page(struct device
*hwdev
, struct page
*page
,
24 dma_addr_t dev_addr
, unsigned long offset
, size_t size
,
25 enum dma_data_direction dir
, unsigned long attrs
) { }
27 static inline void xen_dma_unmap_page(struct device
*hwdev
, dma_addr_t handle
,
28 size_t size
, enum dma_data_direction dir
,
29 unsigned long attrs
) { }
31 static inline void xen_dma_sync_single_for_cpu(struct device
*hwdev
,
32 dma_addr_t handle
, size_t size
, enum dma_data_direction dir
) { }
34 static inline void xen_dma_sync_single_for_device(struct device
*hwdev
,
35 dma_addr_t handle
, size_t size
, enum dma_data_direction dir
) { }
37 #endif /* _ASM_X86_XEN_PAGE_COHERENT_H */