| #ifndef _ASM_X86_XEN_PAGE_COHERENT_H |
| #define _ASM_X86_XEN_PAGE_COHERENT_H |
| |
| #include <asm/page.h> |
| #include <linux/dma-attrs.h> |
| #include <linux/dma-mapping.h> |
| |
| static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size, |
| dma_addr_t *dma_handle, gfp_t flags, |
| struct dma_attrs *attrs) |
| { |
| void *vstart = (void*)__get_free_pages(flags, get_order(size)); |
| *dma_handle = virt_to_phys(vstart); |
| return vstart; |
| } |
| |
| static inline void xen_free_coherent_pages(struct device *hwdev, size_t size, |
| void *cpu_addr, dma_addr_t dma_handle, |
| struct dma_attrs *attrs) |
| { |
| free_pages((unsigned long) cpu_addr, get_order(size)); |
| } |
| |
| static inline void xen_dma_map_page(struct device *hwdev, struct page *page, |
| unsigned long offset, size_t size, enum dma_data_direction dir, |
| struct dma_attrs *attrs) { } |
| |
| static inline void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle, |
| size_t size, enum dma_data_direction dir, |
| struct dma_attrs *attrs) { } |
| |
| static inline void xen_dma_sync_single_for_cpu(struct device *hwdev, |
| dma_addr_t handle, size_t size, enum dma_data_direction dir) { } |
| |
| static inline void xen_dma_sync_single_for_device(struct device *hwdev, |
| dma_addr_t handle, size_t size, enum dma_data_direction dir) { } |
| |
| #endif /* _ASM_X86_XEN_PAGE_COHERENT_H */ |