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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
ff7d37a5 SV |
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) | |
d618382b | 11 | #define IOMMU_ERROR_CODE (~(unsigned long) 0) |
ff7d37a5 SV |
12 | |
13 | struct iommu_pool { | |
14 | unsigned long start; | |
15 | unsigned long end; | |
16 | unsigned long hint; | |
17 | spinlock_t lock; | |
18 | }; | |
19 | ||
20 | struct 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 | ||
35 | extern 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 | ||
42 | extern 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 | ||
49 | extern void iommu_tbl_range_free(struct iommu_map_table *iommu, | |
50 | u64 dma_addr, unsigned long npages, | |
51 | unsigned long entry); | |
52 | ||
53 | #endif |