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ARM: dma-mapping: provide dma_to_page() 

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-By: Jamie Iles <jamie@jamieiles.com>
This commit is contained in:
Russell King 2009-10-31 16:07:16 +00:00
parent 1c4a4f48a1
commit ef1baed887
4 changed files with 26 additions and 0 deletions
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10
arch/arm/include/asm/dma-mapping.h
View File

@ -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);

2
arch/arm/mach-iop13xx/include/mach/memory.h
View File

@ -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 */

7
arch/arm/mach-ks8695/include/mach/memory.h
View File

@ -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

7
arch/arm/plat-omap/include/mach/memory.h
View File

@ -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)); })