1 #ifndef _LINUX_IOMMU_COMMON_H
2 #define _LINUX_IOMMU_COMMON_H
3 
4 #include <linux/spinlock_types.h>
5 #include <linux/device.h>
6 #include <asm/page.h>
7 
8 #define IOMMU_POOL_HASHBITS     4
9 #define IOMMU_NR_POOLS          (1 << IOMMU_POOL_HASHBITS)
10 
11 struct iommu_pool {
12 	unsigned long	start;
13 	unsigned long	end;
14 	unsigned long	hint;
15 	spinlock_t	lock;
16 };
17 
18 struct iommu_map_table {
19 	unsigned long		table_map_base;
20 	unsigned long		table_shift;
21 	unsigned long		nr_pools;
22 	void			(*lazy_flush)(struct iommu_map_table *);
23 	unsigned long		poolsize;
24 	struct iommu_pool	pools[IOMMU_NR_POOLS];
25 	u32			flags;
26 #define	IOMMU_HAS_LARGE_POOL	0x00000001
27 #define	IOMMU_NO_SPAN_BOUND	0x00000002
28 #define	IOMMU_NEED_FLUSH	0x00000004
29 	struct iommu_pool	large_pool;
30 	unsigned long		*map;
31 };
32 
33 extern void iommu_tbl_pool_init(struct iommu_map_table *iommu,
34 				unsigned long num_entries,
35 				u32 table_shift,
36 				void (*lazy_flush)(struct iommu_map_table *),
37 				bool large_pool, u32 npools,
38 				bool skip_span_boundary_check);
39 
40 extern unsigned long iommu_tbl_range_alloc(struct device *dev,
41 					   struct iommu_map_table *iommu,
42 					   unsigned long npages,
43 					   unsigned long *handle,
44 					   unsigned long mask,
45 					   unsigned int align_order);
46 
47 extern void iommu_tbl_range_free(struct iommu_map_table *iommu,
48 				 u64 dma_addr, unsigned long npages,
49 				 unsigned long entry);
50 
51 #endif
52