From ef1baed8870d1eebb0c08d9a466e703f1a21b484 Mon Sep 17 00:00:00 2001 From: Russell King Date: Sat, 31 Oct 2009 16:07:16 +0000 Subject: ARM: dma-mapping: provide dma_to_page() Signed-off-by: Russell King Tested-By: Jamie Iles --- arch/arm/include/asm/dma-mapping.h | 10 ++++++++++ arch/arm/mach-iop13xx/include/mach/memory.h | 2 ++ arch/arm/mach-ks8695/include/mach/memory.h | 7 +++++++ arch/arm/plat-omap/include/mach/memory.h | 7 +++++++ 4 files changed, 26 insertions(+) (limited to 'arch') diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index 5d78eb163953..f06d80c22748 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -20,6 +20,11 @@ static inline dma_addr_t page_to_dma(struct device *dev, struct page *page) return (dma_addr_t)__pfn_to_bus(page_to_pfn(page)); } +static inline struct page *dma_to_page(struct device *dev, dma_addr_t addr) +{ + return pfn_to_page(__bus_to_pfn(addr)); +} + static inline void *dma_to_virt(struct device *dev, dma_addr_t addr) { return (void *)__bus_to_virt(addr); @@ -35,6 +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); diff --git a/arch/arm/mach-iop13xx/include/mach/memory.h b/arch/arm/mach-iop13xx/include/mach/memory.h index 42ae29b288a1..25b1da9a5035 100644 --- a/arch/arm/mach-iop13xx/include/mach/memory.h +++ b/arch/arm/mach-iop13xx/include/mach/memory.h @@ -64,6 +64,8 @@ static inline unsigned long __lbus_to_virt(dma_addr_t x) (dma_addr_t)page_to_phys(page); \ }) +#define __arch_dma_to_page(dev, addr) phys_to_page(addr) + #endif /* CONFIG_ARCH_IOP13XX */ #endif /* !ASSEMBLY */ diff --git a/arch/arm/mach-ks8695/include/mach/memory.h b/arch/arm/mach-ks8695/include/mach/memory.h index 76e5308685a4..ffa19aae6e05 100644 --- a/arch/arm/mach-ks8695/include/mach/memory.h +++ b/arch/arm/mach-ks8695/include/mach/memory.h @@ -41,6 +41,13 @@ extern struct bus_type platform_bus_type; __dma = __dma - PHYS_OFFSET + KS8695_PCIMEM_PA; \ __dma; }) +#define __arch_dma_to_page(dev, x) \ + ({ dma_addr_t __dma = x; \ + if (!is_lbus_device(dev)) \ + __dma += PHYS_OFFSET - KS8695_PCIMEM_PA; \ + phys_to_page(__dma); \ + }) + #endif #endif diff --git a/arch/arm/plat-omap/include/mach/memory.h b/arch/arm/plat-omap/include/mach/memory.h index 9ad41dc484c1..3325f7b49eaa 100644 --- a/arch/arm/plat-omap/include/mach/memory.h +++ b/arch/arm/plat-omap/include/mach/memory.h @@ -68,6 +68,13 @@ __dma = __dma - PHYS_OFFSET + OMAP1510_LB_OFFSET; \ __dma; }) +#define __arch_dma_to_page(dev, addr) \ + ({ dma_addr_t __dma = addr; \ + if (is_lbus_device(dev)) \ + __dma += PHYS_OFFSET - OMAP1510_LB_OFFSET; \ + phys_to_page(__dma); \ + }) + #define __arch_dma_to_virt(dev, addr) ({ (void *) (is_lbus_device(dev) ? \ lbus_to_virt(addr) : \ __phys_to_virt(addr)); }) -- cgit v1.2.1