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>
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 5d78eb1..f06d80c 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -20,6 +20,11 @@
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 @@
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 42ae29b..25b1da9 100644
--- a/arch/arm/mach-iop13xx/include/mach/memory.h
+++ b/arch/arm/mach-iop13xx/include/mach/memory.h
@@ -64,6 +64,8 @@
(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 76e5308..ffa19aa 100644
--- a/arch/arm/mach-ks8695/include/mach/memory.h
+++ b/arch/arm/mach-ks8695/include/mach/memory.h
@@ -41,6 +41,13 @@
__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 9ad41dc..3325f7b 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)); })