#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, dma_addr_t dev_addr, 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 */