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
11struct iommu_pool {
12	unsigned long	start;
13	unsigned long	end;
14	unsigned long	hint;
15	spinlock_t	lock;
16};
17
18struct 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
33extern 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
40extern 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
47extern 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