--- zzzz-none-000/linux-4.4.271/include/linux/dma-iommu.h	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/include/linux/dma-iommu.h	2023-04-19 10:22:30.000000000 +0000
@@ -21,8 +21,26 @@
 #include <asm/errno.h>
 
 #ifdef CONFIG_IOMMU_DMA
+#include <linux/dma-mapping.h>
 #include <linux/iommu.h>
 
+struct dma_iommu_mapping {
+	 /* iommu specific data */
+	 struct iommu_domain     *domain;
+
+	 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;
+	 struct dma_fast_smmu_mapping *fast;
+
+	 spinlock_t		lock;
+	 struct kref	      kref;
+};
+
 int iommu_dma_init(void);
 
 /* Domain management interface for IOMMU drivers */
@@ -39,8 +57,8 @@
  * These implement the bulk of the relevant DMA mapping callbacks, but require
  * the arch code to take care of attributes and cache maintenance
  */
-struct page **iommu_dma_alloc(struct device *dev, size_t size,
-		gfp_t gfp, int prot, dma_addr_t *handle,
+struct page **iommu_dma_alloc(struct device *dev, size_t size, gfp_t gfp,
+		struct dma_attrs *attrs, int prot, dma_addr_t *handle,
 		void (*flush_page)(struct device *, const void *, phys_addr_t));
 void iommu_dma_free(struct device *dev, struct page **pages, size_t size,
 		dma_addr_t *handle);