Stefano Stabellini | d6fe76c | 2013-10-09 17:18:14 +0000 | [diff] [blame] | 1 | #ifndef _ASM_X86_XEN_PAGE_COHERENT_H |
| 2 | #define _ASM_X86_XEN_PAGE_COHERENT_H |
| 3 | |
| 4 | #include <asm/page.h> |
Stefano Stabellini | d6fe76c | 2013-10-09 17:18:14 +0000 | [diff] [blame] | 5 | #include <linux/dma-mapping.h> |
| 6 | |
| 7 | static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size, |
| 8 | dma_addr_t *dma_handle, gfp_t flags, |
Krzysztof Kozlowski | 00085f1 | 2016-08-03 13:46:00 -0700 | [diff] [blame^] | 9 | unsigned long attrs) |
Stefano Stabellini | d6fe76c | 2013-10-09 17:18:14 +0000 | [diff] [blame] | 10 | { |
| 11 | void *vstart = (void*)__get_free_pages(flags, get_order(size)); |
| 12 | *dma_handle = virt_to_phys(vstart); |
| 13 | return vstart; |
| 14 | } |
| 15 | |
| 16 | static inline void xen_free_coherent_pages(struct device *hwdev, size_t size, |
| 17 | void *cpu_addr, dma_addr_t dma_handle, |
Krzysztof Kozlowski | 00085f1 | 2016-08-03 13:46:00 -0700 | [diff] [blame^] | 18 | unsigned long attrs) |
Stefano Stabellini | d6fe76c | 2013-10-09 17:18:14 +0000 | [diff] [blame] | 19 | { |
| 20 | free_pages((unsigned long) cpu_addr, get_order(size)); |
| 21 | } |
| 22 | |
Stefano Stabellini | 7100b07 | 2013-10-25 10:39:49 +0000 | [diff] [blame] | 23 | static inline void xen_dma_map_page(struct device *hwdev, struct page *page, |
Stefano Stabellini | a0f2dee | 2014-11-21 11:04:39 +0000 | [diff] [blame] | 24 | dma_addr_t dev_addr, unsigned long offset, size_t size, |
Krzysztof Kozlowski | 00085f1 | 2016-08-03 13:46:00 -0700 | [diff] [blame^] | 25 | enum dma_data_direction dir, unsigned long attrs) { } |
Stefano Stabellini | 7100b07 | 2013-10-25 10:39:49 +0000 | [diff] [blame] | 26 | |
| 27 | static inline void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle, |
| 28 | size_t size, enum dma_data_direction dir, |
Krzysztof Kozlowski | 00085f1 | 2016-08-03 13:46:00 -0700 | [diff] [blame^] | 29 | unsigned long attrs) { } |
Stefano Stabellini | 7100b07 | 2013-10-25 10:39:49 +0000 | [diff] [blame] | 30 | |
| 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) { } |
| 33 | |
| 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) { } |
| 36 | |
Stefano Stabellini | d6fe76c | 2013-10-09 17:18:14 +0000 | [diff] [blame] | 37 | #endif /* _ASM_X86_XEN_PAGE_COHERENT_H */ |