diff options
Diffstat (limited to '')
| -rw-r--r-- | arch/arm/xen/mm.c | 64 | ||||
| -rw-r--r-- | arch/x86/include/asm/xen/page-coherent.h | 14 | ||||
| -rw-r--r-- | drivers/xen/swiotlb-xen.c | 20 | ||||
| -rw-r--r-- | include/xen/arm/page-coherent.h | 63 | ||||
| -rw-r--r-- | include/xen/swiotlb-xen.h | 5 |
5 files changed, 32 insertions, 134 deletions
diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c index 9d73fa4a5991..2b2c208408bb 100644 --- a/arch/arm/xen/mm.c +++ b/arch/arm/xen/mm.c @@ -60,63 +60,33 @@ static void dma_cache_maint(dma_addr_t handle, size_t size, u32 op) } while (size); } -static void __xen_dma_page_dev_to_cpu(struct device *hwdev, dma_addr_t handle, - size_t size, enum dma_data_direction dir) +/* + * Dom0 is mapped 1:1, and while the Linux page can span across multiple Xen + * pages, it is not possible for it to contain a mix of local and foreign Xen + * pages. Calling pfn_valid on a foreign mfn will always return false, so if + * pfn_valid returns true the pages is local and we can use the native + * dma-direct functions, otherwise we call the Xen specific version. + */ +void xen_dma_sync_for_cpu(struct device *dev, dma_addr_t handle, + phys_addr_t paddr, size_t size, enum dma_data_direction dir) { - if (dir != DMA_TO_DEVICE) + if (pfn_valid(PFN_DOWN(handle))) + arch_sync_dma_for_cpu(dev, paddr, size, dir); + else if (dir != DMA_TO_DEVICE) dma_cache_maint(handle, size, GNTTAB_CACHE_INVAL); } -static void __xen_dma_page_cpu_to_dev(struct device *hwdev, dma_addr_t handle, - size_t size, enum dma_data_direction dir) +void xen_dma_sync_for_device(struct device *dev, dma_addr_t handle, + phys_addr_t paddr, size_t size, enum dma_data_direction dir) { - if (dir == DMA_FROM_DEVICE) + if (pfn_valid(PFN_DOWN(handle))) + arch_sync_dma_for_device(dev, paddr, size, dir); + else if (dir == DMA_FROM_DEVICE) dma_cache_maint(handle, size, GNTTAB_CACHE_INVAL); else dma_cache_maint(handle, size, GNTTAB_CACHE_CLEAN); } -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) -{ - if (dev_is_dma_coherent(hwdev)) - return; - if (attrs & DMA_ATTR_SKIP_CPU_SYNC) - return; - - __xen_dma_page_cpu_to_dev(hwdev, dev_addr, size, dir); -} - -void __xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle, - size_t size, enum dma_data_direction dir, - unsigned long attrs) - -{ - if (dev_is_dma_coherent(hwdev)) - return; - if (attrs & DMA_ATTR_SKIP_CPU_SYNC) - return; - - __xen_dma_page_dev_to_cpu(hwdev, handle, size, dir); -} - -void __xen_dma_sync_single_for_cpu(struct device *hwdev, - dma_addr_t handle, size_t size, enum dma_data_direction dir) -{ - if (dev_is_dma_coherent(hwdev)) - return; - __xen_dma_page_dev_to_cpu(hwdev, handle, size, dir); -} - -void __xen_dma_sync_single_for_device(struct device *hwdev, - dma_addr_t handle, size_t size, enum dma_data_direction dir) -{ - if (dev_is_dma_coherent(hwdev)) - return; - __xen_dma_page_cpu_to_dev(hwdev, handle, size, dir); -} - bool xen_arch_need_swiotlb(struct device *dev, phys_addr_t phys, dma_addr_t dev_addr) diff --git a/arch/x86/include/asm/xen/page-coherent.h b/arch/x86/include/asm/xen/page-coherent.h index 116777e7f387..63cd41b2e17a 100644 --- a/arch/x86/include/asm/xen/page-coherent.h +++ b/arch/x86/include/asm/xen/page-coherent.h @@ -21,18 +21,4 @@ static inline void xen_free_coherent_pages(struct device *hwdev, size_t size, 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, unsigned long attrs) { } - -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) { } - -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 */ diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index b8808677ae1d..f81031f0c1c7 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -28,6 +28,7 @@ #include <linux/memblock.h> #include <linux/dma-direct.h> +#include <linux/dma-noncoherent.h> #include <linux/export.h> #include <xen/swiotlb-xen.h> #include <xen/page.h> @@ -391,6 +392,7 @@ static dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page, if (map == (phys_addr_t)DMA_MAPPING_ERROR) return DMA_MAPPING_ERROR; + phys = map; dev_addr = xen_phys_to_bus(map); /* @@ -402,14 +404,9 @@ static dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page, return DMA_MAPPING_ERROR; } - page = pfn_to_page(map >> PAGE_SHIFT); - offset = map & ~PAGE_MASK; done: - /* - * we are not interested in the dma_addr returned by xen_dma_map_page, - * only in the potential cache flushes executed by the function. - */ - xen_dma_map_page(dev, page, dev_addr, offset, size, dir, attrs); + if (!dev_is_dma_coherent(dev) && !(attrs & DMA_ATTR_SKIP_CPU_SYNC)) + xen_dma_sync_for_device(dev, dev_addr, phys, size, dir); return dev_addr; } @@ -429,7 +426,8 @@ static void xen_unmap_single(struct device *hwdev, dma_addr_t dev_addr, BUG_ON(dir == DMA_NONE); - xen_dma_unmap_page(hwdev, dev_addr, size, dir, attrs); + if (!dev_is_dma_coherent(hwdev) && !(attrs & DMA_ATTR_SKIP_CPU_SYNC)) + xen_dma_sync_for_cpu(hwdev, dev_addr, paddr, size, dir); /* NOTE: We use dev_addr here, not paddr! */ if (is_xen_swiotlb_buffer(dev_addr)) @@ -449,7 +447,8 @@ xen_swiotlb_sync_single_for_cpu(struct device *dev, dma_addr_t dma_addr, { phys_addr_t paddr = xen_bus_to_phys(dma_addr); - xen_dma_sync_single_for_cpu(dev, dma_addr, size, dir); + if (!dev_is_dma_coherent(dev)) + xen_dma_sync_for_cpu(dev, dma_addr, paddr, size, dir); if (is_xen_swiotlb_buffer(dma_addr)) swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_CPU); @@ -464,7 +463,8 @@ xen_swiotlb_sync_single_for_device(struct device *dev, dma_addr_t dma_addr, if (is_xen_swiotlb_buffer(dma_addr)) swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_DEVICE); - xen_dma_sync_single_for_device(dev, dma_addr, size, dir); + if (!dev_is_dma_coherent(dev)) + xen_dma_sync_for_device(dev, dma_addr, paddr, size, dir); } /* diff --git a/include/xen/arm/page-coherent.h b/include/xen/arm/page-coherent.h index a8d9c0678c27..b9cc11e887ed 100644 --- a/include/xen/arm/page-coherent.h +++ b/include/xen/arm/page-coherent.h @@ -5,17 +5,6 @@ #include <linux/dma-mapping.h> #include <asm/page.h> -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); -void __xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle, - size_t size, enum dma_data_direction dir, - unsigned long attrs); -void __xen_dma_sync_single_for_cpu(struct device *hwdev, - dma_addr_t handle, size_t size, enum dma_data_direction dir); -void __xen_dma_sync_single_for_device(struct device *hwdev, - dma_addr_t handle, size_t size, enum dma_data_direction dir); - static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size, dma_addr_t *dma_handle, gfp_t flags, unsigned long attrs) { @@ -28,56 +17,4 @@ static inline void xen_free_coherent_pages(struct device *hwdev, size_t size, dma_direct_free(hwdev, size, cpu_addr, dma_handle, 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) -{ - unsigned long pfn = PFN_DOWN(handle); - - 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); -} - -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); -} - -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 pfn = PFN_DOWN(dev_addr); - - /* - * Dom0 is mapped 1:1, and while the Linux page can span across multiple - * Xen pages, it is not possible for it to contain a mix of local and - * foreign Xen pages. Calling pfn_valid on a foreign mfn will always - * return false, so if pfn_valid returns true the pages is local and we - * can use the native dma-direct functions, otherwise we call the Xen - * specific version. - */ - if (pfn_valid(pfn)) - dma_direct_map_page(hwdev, page, offset, size, dir, attrs); - else - __xen_dma_map_page(hwdev, page, dev_addr, offset, size, dir, attrs); -} - -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); - - if (pfn_valid(pfn)) - dma_direct_unmap_page(hwdev, handle, size, dir, attrs); - else - __xen_dma_unmap_page(hwdev, handle, size, dir, attrs); -} - #endif /* _XEN_ARM_PAGE_COHERENT_H */ diff --git a/include/xen/swiotlb-xen.h b/include/xen/swiotlb-xen.h index 5e4b83f83dbc..d71380f6ed0b 100644 --- a/include/xen/swiotlb-xen.h +++ b/include/xen/swiotlb-xen.h @@ -4,6 +4,11 @@ #include <linux/swiotlb.h> +void xen_dma_sync_for_cpu(struct device *dev, dma_addr_t handle, + phys_addr_t paddr, size_t size, enum dma_data_direction dir); +void xen_dma_sync_for_device(struct device *dev, dma_addr_t handle, + phys_addr_t paddr, size_t size, enum dma_data_direction dir); + extern int xen_swiotlb_init(int verbose, bool early); extern const struct dma_map_ops xen_swiotlb_dma_ops; |