1
2#ifndef _LINUX_IOMMU_COMMON_H
3#define _LINUX_IOMMU_COMMON_H
4
5#include <linux/spinlock_types.h>
6#include <linux/device.h>
7#include <asm/page.h>
8
9#define IOMMU_POOL_HASHBITS 4
10#define IOMMU_NR_POOLS (1 << IOMMU_POOL_HASHBITS)
11#define IOMMU_ERROR_CODE (~(unsigned long) 0)
12
13struct iommu_pool {
14 unsigned long start;
15 unsigned long end;
16 unsigned long hint;
17 spinlock_t lock;
18};
19
20struct iommu_map_table {
21 unsigned long table_map_base;
22 unsigned long table_shift;
23 unsigned long nr_pools;
24 void (*lazy_flush)(struct iommu_map_table *);
25 unsigned long poolsize;
26 struct iommu_pool pools[IOMMU_NR_POOLS];
27 u32 flags;
28#define IOMMU_HAS_LARGE_POOL 0x00000001
29#define IOMMU_NO_SPAN_BOUND 0x00000002
30#define IOMMU_NEED_FLUSH 0x00000004
31 struct iommu_pool large_pool;
32 unsigned long *map;
33};
34
35extern void iommu_tbl_pool_init(struct iommu_map_table *iommu,
36 unsigned long num_entries,
37 u32 table_shift,
38 void (*lazy_flush)(struct iommu_map_table *),
39 bool large_pool, u32 npools,
40 bool skip_span_boundary_check);
41
42extern unsigned long iommu_tbl_range_alloc(struct device *dev,
43 struct iommu_map_table *iommu,
44 unsigned long npages,
45 unsigned long *handle,
46 unsigned long mask,
47 unsigned int align_order);
48
49extern void iommu_tbl_range_free(struct iommu_map_table *iommu,
50 u64 dma_addr, unsigned long npages,
51 unsigned long entry);
52
53#endif
54
