Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
d6fe76c5 SS |
2 | #ifndef _ASM_X86_XEN_PAGE_COHERENT_H |
3 | #define _ASM_X86_XEN_PAGE_COHERENT_H | |
4 | ||
5 | #include <asm/page.h> | |
d6fe76c5 SS |
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, | |
00085f1e | 10 | unsigned long attrs) |
d6fe76c5 SS |
11 | { |
12 | void *vstart = (void*)__get_free_pages(flags, get_order(size)); | |
13 | *dma_handle = virt_to_phys(vstart); | |
14 | return vstart; | |
15 | } | |
16 | ||
17 | static inline void xen_free_coherent_pages(struct device *hwdev, size_t size, | |
18 | void *cpu_addr, dma_addr_t dma_handle, | |
00085f1e | 19 | unsigned long attrs) |
d6fe76c5 SS |
20 | { |
21 | free_pages((unsigned long) cpu_addr, get_order(size)); | |
22 | } | |
23 | ||
7100b077 | 24 | static inline void xen_dma_map_page(struct device *hwdev, struct page *page, |
a0f2dee0 | 25 | dma_addr_t dev_addr, unsigned long offset, size_t size, |
00085f1e | 26 | enum dma_data_direction dir, unsigned long attrs) { } |
7100b077 SS |
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, | |
00085f1e | 30 | unsigned long attrs) { } |
7100b077 SS |
31 | |
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 | ||
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 | ||
d6fe76c5 | 38 | #endif /* _ASM_X86_XEN_PAGE_COHERENT_H */ |