--- zzzz-none-000/linux-3.10.107/arch/arm/include/asm/dma-iommu.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/arm/include/asm/dma-iommu.h	2021-02-04 17:41:59.000000000 +0000
@@ -8,23 +8,28 @@
 #include <linux/dma-debug.h>
 #include <linux/kmemcheck.h>
 #include <linux/kref.h>
+#include <linux/dma-mapping-fast.h>
 
 struct dma_iommu_mapping {
 	/* iommu specific data */
 	struct iommu_domain	*domain;
 
-	void			*bitmap;
-	size_t			bits;
-	unsigned int		order;
+	unsigned long		**bitmaps;	/* array of bitmaps */
+	unsigned int		nr_bitmaps;	/* nr of elements in array */
+	unsigned int		extensions;
+	size_t			bitmap_size;	/* size of a single bitmap */
+	size_t			bits;		/* per bitmap */
 	dma_addr_t		base;
+	u64			size;
 
 	spinlock_t		lock;
 	struct kref		kref;
+
+	struct dma_fast_smmu_mapping *fast;
 };
 
-struct dma_iommu_mapping *
-arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, size_t size,
-			 int order);
+struct dma_iommu_mapping *arm_iommu_create_mapping(struct device *dev,
+			struct bus_type *bus, dma_addr_t base, u64 size);
 
 void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping);