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#define IOMMU_ERROR_CODE	(~(unsigned long) 0)
11
12struct iommu_pool {
13	unsigned long	start;
14	unsigned long	end;
15	unsigned long	hint;
16	spinlock_t	lock;
17};
18
19struct iommu_map_table {
20	unsigned long		table_map_base;
21	unsigned long		table_shift;
22	unsigned long		nr_pools;
23	void			(*lazy_flush)(struct iommu_map_table *);
24	unsigned long		poolsize;
25	struct iommu_pool	pools[IOMMU_NR_POOLS];
26	u32			flags;
27#define	IOMMU_HAS_LARGE_POOL	0x00000001
28#define	IOMMU_NO_SPAN_BOUND	0x00000002
29#define	IOMMU_NEED_FLUSH	0x00000004
30	struct iommu_pool	large_pool;
31	unsigned long		*map;
32};
33
34extern void iommu_tbl_pool_init(struct iommu_map_table *iommu,
35				unsigned long num_entries,
36				u32 table_shift,
37				void (*lazy_flush)(struct iommu_map_table *),
38				bool large_pool, u32 npools,
39				bool skip_span_boundary_check);
40
41extern unsigned long iommu_tbl_range_alloc(struct device *dev,
42					   struct iommu_map_table *iommu,
43					   unsigned long npages,
44					   unsigned long *handle,
45					   unsigned long mask,
46					   unsigned int align_order);
47
48extern void iommu_tbl_range_free(struct iommu_map_table *iommu,
49				 u64 dma_addr, unsigned long npages,
50				 unsigned long entry);
51
52#endif
53