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xen/arm: consolidate page-coherent.h
Shared the duplicate arm/arm64 code in include/xen/arm/page-coherent.h. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Stefano Stabellini <[email protected]>
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Christoph Hellwig
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Sep 11, 2019
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,77 +1,2 @@ | ||
| /* SPDX-License-Identifier: GPL-2.0 */ | ||
| #ifndef _ASM_ARM_XEN_PAGE_COHERENT_H | ||
| #define _ASM_ARM_XEN_PAGE_COHERENT_H | ||
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| #include <linux/dma-mapping.h> | ||
| #include <asm/page.h> | ||
| #include <xen/arm/page-coherent.h> | ||
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| static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size, | ||
| dma_addr_t *dma_handle, gfp_t flags, unsigned long attrs) | ||
| { | ||
| return dma_direct_alloc(hwdev, size, dma_handle, flags, attrs); | ||
| } | ||
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| static inline void xen_free_coherent_pages(struct device *hwdev, size_t size, | ||
| void *cpu_addr, dma_addr_t dma_handle, unsigned long attrs) | ||
| { | ||
| dma_direct_free(hwdev, size, cpu_addr, dma_handle, attrs); | ||
| } | ||
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| static inline void xen_dma_sync_single_for_cpu(struct device *hwdev, | ||
| dma_addr_t handle, size_t size, enum dma_data_direction dir) | ||
| { | ||
| unsigned long pfn = PFN_DOWN(handle); | ||
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| if (pfn_valid(pfn)) | ||
| dma_direct_sync_single_for_cpu(hwdev, handle, size, dir); | ||
| else | ||
| __xen_dma_sync_single_for_cpu(hwdev, handle, size, dir); | ||
| } | ||
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| static inline void xen_dma_sync_single_for_device(struct device *hwdev, | ||
| dma_addr_t handle, size_t size, enum dma_data_direction dir) | ||
| { | ||
| unsigned long pfn = PFN_DOWN(handle); | ||
| if (pfn_valid(pfn)) | ||
| dma_direct_sync_single_for_device(hwdev, handle, size, dir); | ||
| else | ||
| __xen_dma_sync_single_for_device(hwdev, handle, size, dir); | ||
| } | ||
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| 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, unsigned long attrs) | ||
| { | ||
| unsigned long page_pfn = page_to_xen_pfn(page); | ||
| unsigned long dev_pfn = XEN_PFN_DOWN(dev_addr); | ||
| unsigned long compound_pages = | ||
| (1<<compound_order(page)) * XEN_PFN_PER_PAGE; | ||
| bool local = (page_pfn <= dev_pfn) && | ||
| (dev_pfn - page_pfn < compound_pages); | ||
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||
| if (local) | ||
| dma_direct_map_page(hwdev, page, offset, size, dir, attrs); | ||
| else | ||
| __xen_dma_map_page(hwdev, page, dev_addr, offset, size, dir, attrs); | ||
| } | ||
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| static inline void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle, | ||
| size_t size, enum dma_data_direction dir, unsigned long attrs) | ||
| { | ||
| unsigned long pfn = PFN_DOWN(handle); | ||
| /* | ||
| * Dom0 is mapped 1:1, while the Linux page can be spanned accross | ||
| * multiple Xen page, it's not possible to have a mix of local and | ||
| * foreign Xen page. Dom0 is mapped 1:1, so calling pfn_valid on a | ||
| * foreign mfn will always return false. If the page is local we can | ||
| * safely call the native dma_ops function, otherwise we call the xen | ||
| * specific function. | ||
| */ | ||
| if (pfn_valid(pfn)) | ||
| dma_direct_unmap_page(hwdev, handle, size, dir, attrs); | ||
| else | ||
| __xen_dma_unmap_page(hwdev, handle, size, dir, attrs); | ||
| } | ||
|
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||
| #endif /* _ASM_ARM_XEN_PAGE_COHERENT_H */ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,77 +1,2 @@ | ||
| /* SPDX-License-Identifier: GPL-2.0 */ | ||
| #ifndef _ASM_ARM64_XEN_PAGE_COHERENT_H | ||
| #define _ASM_ARM64_XEN_PAGE_COHERENT_H | ||
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| #include <linux/dma-mapping.h> | ||
| #include <asm/page.h> | ||
| #include <xen/arm/page-coherent.h> | ||
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| static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size, | ||
| dma_addr_t *dma_handle, gfp_t flags, unsigned long attrs) | ||
| { | ||
| return dma_direct_alloc(hwdev, size, dma_handle, flags, attrs); | ||
| } | ||
|
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||
| static inline void xen_free_coherent_pages(struct device *hwdev, size_t size, | ||
| void *cpu_addr, dma_addr_t dma_handle, unsigned long attrs) | ||
| { | ||
| dma_direct_free(hwdev, size, cpu_addr, dma_handle, attrs); | ||
| } | ||
|
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||
| static inline void xen_dma_sync_single_for_cpu(struct device *hwdev, | ||
| dma_addr_t handle, size_t size, enum dma_data_direction dir) | ||
| { | ||
| unsigned long pfn = PFN_DOWN(handle); | ||
|
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||
| if (pfn_valid(pfn)) | ||
| dma_direct_sync_single_for_cpu(hwdev, handle, size, dir); | ||
| else | ||
| __xen_dma_sync_single_for_cpu(hwdev, handle, size, dir); | ||
| } | ||
|
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| static inline void xen_dma_sync_single_for_device(struct device *hwdev, | ||
| dma_addr_t handle, size_t size, enum dma_data_direction dir) | ||
| { | ||
| unsigned long pfn = PFN_DOWN(handle); | ||
| if (pfn_valid(pfn)) | ||
| dma_direct_sync_single_for_device(hwdev, handle, size, dir); | ||
| else | ||
| __xen_dma_sync_single_for_device(hwdev, handle, size, dir); | ||
| } | ||
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| 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, unsigned long attrs) | ||
| { | ||
| unsigned long page_pfn = page_to_xen_pfn(page); | ||
| unsigned long dev_pfn = XEN_PFN_DOWN(dev_addr); | ||
| unsigned long compound_pages = | ||
| (1<<compound_order(page)) * XEN_PFN_PER_PAGE; | ||
| bool local = (page_pfn <= dev_pfn) && | ||
| (dev_pfn - page_pfn < compound_pages); | ||
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| if (local) | ||
| dma_direct_map_page(hwdev, page, offset, size, dir, attrs); | ||
| else | ||
| __xen_dma_map_page(hwdev, page, dev_addr, offset, size, dir, attrs); | ||
| } | ||
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| static inline void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle, | ||
| size_t size, enum dma_data_direction dir, unsigned long attrs) | ||
| { | ||
| unsigned long pfn = PFN_DOWN(handle); | ||
| /* | ||
| * Dom0 is mapped 1:1, while the Linux page can be spanned accross | ||
| * multiple Xen page, it's not possible to have a mix of local and | ||
| * foreign Xen page. Dom0 is mapped 1:1, so calling pfn_valid on a | ||
| * foreign mfn will always return false. If the page is local we can | ||
| * safely call the native dma_ops function, otherwise we call the xen | ||
| * specific function. | ||
| */ | ||
| if (pfn_valid(pfn)) | ||
| dma_direct_unmap_page(hwdev, handle, size, dir, attrs); | ||
| else | ||
| __xen_dma_unmap_page(hwdev, handle, size, dir, attrs); | ||
| } | ||
|
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||
| #endif /* _ASM_ARM64_XEN_PAGE_COHERENT_H */ |
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