diff options
Diffstat (limited to 'arch/arm/include/asm/dma-mapping.h')
| -rw-r--r-- | arch/arm/include/asm/dma-mapping.h | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index ff46dfa68a97..a96300bf83fd 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -15,20 +15,15 @@ * must not be used by drivers. */ #ifndef __arch_page_to_dma - -#if !defined(CONFIG_HIGHMEM) static inline dma_addr_t page_to_dma(struct device *dev, struct page *page) { - return (dma_addr_t)__virt_to_bus((unsigned long)page_address(page)); + return (dma_addr_t)__pfn_to_bus(page_to_pfn(page)); } -#elif defined(__pfn_to_bus) -static inline dma_addr_t page_to_dma(struct device *dev, struct page *page) + +static inline struct page *dma_to_page(struct device *dev, dma_addr_t addr) { - return (dma_addr_t)__pfn_to_bus(page_to_pfn(page)); + return pfn_to_page(__bus_to_pfn(addr)); } -#else -#error "this machine class needs to define __arch_page_to_dma to use HIGHMEM" -#endif static inline void *dma_to_virt(struct device *dev, dma_addr_t addr) { @@ -45,6 +40,11 @@ static inline dma_addr_t page_to_dma(struct device *dev, struct page *page) return __arch_page_to_dma(dev, page); } +static inline struct page *dma_to_page(struct device *dev, dma_addr_t addr) +{ + return __arch_dma_to_page(dev, addr); +} + static inline void *dma_to_virt(struct device *dev, dma_addr_t addr) { return __arch_dma_to_virt(dev, addr); @@ -257,9 +257,11 @@ extern int dma_needs_bounce(struct device*, dma_addr_t, size_t); */ extern dma_addr_t dma_map_single(struct device *, void *, size_t, enum dma_data_direction); +extern void dma_unmap_single(struct device *, dma_addr_t, size_t, + enum dma_data_direction); extern dma_addr_t dma_map_page(struct device *, struct page *, unsigned long, size_t, enum dma_data_direction); -extern void dma_unmap_single(struct device *, dma_addr_t, size_t, +extern void dma_unmap_page(struct device *, dma_addr_t, size_t, enum dma_data_direction); /* @@ -352,7 +354,6 @@ static inline void dma_unmap_single(struct device *dev, dma_addr_t handle, { /* nothing to do */ } -#endif /* CONFIG_DMABOUNCE */ /** * dma_unmap_page - unmap a buffer previously mapped through dma_map_page() @@ -371,8 +372,9 @@ static inline void dma_unmap_single(struct device *dev, dma_addr_t handle, static inline void dma_unmap_page(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir) { - dma_unmap_single(dev, handle, size, dir); + /* nothing to do */ } +#endif /* CONFIG_DMABOUNCE */ /** * dma_sync_single_range_for_cpu |