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Diffstat (limited to 'arch/arm/include/asm/dma-direct.h')
-rw-r--r--arch/arm/include/asm/dma-direct.h35
1 files changed, 33 insertions, 2 deletions
diff --git a/arch/arm/include/asm/dma-direct.h b/arch/arm/include/asm/dma-direct.h
index 7c3001a6a775..77fcb7ee5ec9 100644
--- a/arch/arm/include/asm/dma-direct.h
+++ b/arch/arm/include/asm/dma-direct.h
@@ -2,13 +2,44 @@
#ifndef ASM_ARM_DMA_DIRECT_H
#define ASM_ARM_DMA_DIRECT_H 1
-static inline dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
+#include <asm/memory.h>
+
+/*
+ * dma_to_pfn/pfn_to_dma/virt_to_dma are architecture private
+ * functions used internally by the DMA-mapping API to provide DMA
+ * addresses. They must not be used by drivers.
+ */
+static inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn)
+{
+ if (dev && dev->dma_range_map)
+ pfn = PFN_DOWN(translate_phys_to_dma(dev, PFN_PHYS(pfn)));
+ return (dma_addr_t)__pfn_to_bus(pfn);
+}
+
+static inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr)
+{
+ unsigned long pfn = __bus_to_pfn(addr);
+
+ if (dev && dev->dma_range_map)
+ pfn = PFN_DOWN(translate_dma_to_phys(dev, PFN_PHYS(pfn)));
+ return pfn;
+}
+
+static inline dma_addr_t virt_to_dma(struct device *dev, void *addr)
+{
+ if (dev)
+ return pfn_to_dma(dev, virt_to_pfn(addr));
+
+ return (dma_addr_t)__virt_to_bus((unsigned long)(addr));
+}
+
+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)
+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;