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Sowmini Varadhanff7d37a2015-04-09 15:33:30 -04001#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