1 #ifndef _ASM_X86_XEN_PAGE_COHERENT_H
2 #define _ASM_X86_XEN_PAGE_COHERENT_H
3
4 #include <asm/page.h>
5 #include <linux/dma-attrs.h>
6 #include <linux/dma-mapping.h>
7
xen_alloc_coherent_pages(struct device * hwdev,size_t size,dma_addr_t * dma_handle,gfp_t flags,struct dma_attrs * attrs)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 void *vstart = (void*)__get_free_pages(flags, get_order(size));
13 *dma_handle = virt_to_phys(vstart);
14 return vstart;
15 }
16
xen_free_coherent_pages(struct device * hwdev,size_t size,void * cpu_addr,dma_addr_t dma_handle,struct dma_attrs * attrs)17 static inline void xen_free_coherent_pages(struct device *hwdev, size_t size,
18 void *cpu_addr, dma_addr_t dma_handle,
19 struct dma_attrs *attrs)
20 {
21 free_pages((unsigned long) cpu_addr, get_order(size));
22 }
23
xen_dma_map_page(struct device * hwdev,struct page * page,dma_addr_t dev_addr,unsigned long offset,size_t size,enum dma_data_direction dir,struct dma_attrs * attrs)24 static inline void xen_dma_map_page(struct device *hwdev, struct page *page,
25 dma_addr_t dev_addr, unsigned long offset, size_t size,
26 enum dma_data_direction dir, struct dma_attrs *attrs) { }
27
xen_dma_unmap_page(struct device * hwdev,dma_addr_t handle,size_t size,enum dma_data_direction dir,struct dma_attrs * attrs)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
xen_dma_sync_single_for_cpu(struct device * hwdev,dma_addr_t handle,size_t size,enum dma_data_direction dir)32 static inline void xen_dma_sync_single_for_cpu(struct device *hwdev,
33 dma_addr_t handle, size_t size, enum dma_data_direction dir) { }
34
xen_dma_sync_single_for_device(struct device * hwdev,dma_addr_t handle,size_t size,enum dma_data_direction dir)35 static inline void xen_dma_sync_single_for_device(struct device *hwdev,
36 dma_addr_t handle, size_t size, enum dma_data_direction dir) { }
37
38 #endif /* _ASM_X86_XEN_PAGE_COHERENT_H */
39