1 files changed, 33 insertions, 0 deletions

diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 5b579b951503..1ad2c171054b 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -86,6 +86,39 @@ static inline dma_addr_t virt_to_dma(struct device *dev, void *addr)
 }
 #endif
 
+static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
+{
+        unsigned int offset = paddr & ~PAGE_MASK;
+        return pfn_to_dma(dev, __phys_to_pfn(paddr)) + offset;
+}
+
+static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr)
+{
+        unsigned int offset = dev_addr & ~PAGE_MASK;
+        return __pfn_to_phys(dma_to_pfn(dev, dev_addr)) + offset;
+}
+
+static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
+{
+        u64 limit, mask;
+
+        if (!dev->dma_mask)
+                return 0;
+
+        mask = *dev->dma_mask;
+
+        limit = (mask + 1) & ~mask;
+        if (limit && size > limit)
+                return 0;
+
+        if ((addr | (addr + size - 1)) & ~mask)
+                return 0;
+
+        return 1;
+}
+
+static inline void dma_mark_clean(void *addr, size_t size) { }
+
 /*
  * DMA errors are defined by all-bits-set in the DMA address.
  */