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4a77a6cf JR |
1 | /* |
2 | * Copyright (C) 2007-2008 Advanced Micro Devices, Inc. | |
3 | * Author: Joerg Roedel <joerg.roedel@amd.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License version 2 as published | |
7 | * by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
17 | */ | |
18 | ||
19 | #ifndef __LINUX_IOMMU_H | |
20 | #define __LINUX_IOMMU_H | |
21 | ||
22 | #define IOMMU_READ (1) | |
23 | #define IOMMU_WRITE (2) | |
9cf06697 | 24 | #define IOMMU_CACHE (4) /* DMA cache coherency */ |
4a77a6cf JR |
25 | |
26 | struct device; | |
27 | ||
28 | struct iommu_domain { | |
29 | void *priv; | |
30 | }; | |
31 | ||
dbb9fd86 SY |
32 | #define IOMMU_CAP_CACHE_COHERENCY 0x1 |
33 | ||
4a77a6cf JR |
34 | struct iommu_ops { |
35 | int (*domain_init)(struct iommu_domain *domain); | |
36 | void (*domain_destroy)(struct iommu_domain *domain); | |
37 | int (*attach_dev)(struct iommu_domain *domain, struct device *dev); | |
38 | void (*detach_dev)(struct iommu_domain *domain, struct device *dev); | |
39 | int (*map)(struct iommu_domain *domain, unsigned long iova, | |
40 | phys_addr_t paddr, size_t size, int prot); | |
41 | void (*unmap)(struct iommu_domain *domain, unsigned long iova, | |
42 | size_t size); | |
43 | phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, | |
44 | unsigned long iova); | |
dbb9fd86 SY |
45 | int (*domain_has_cap)(struct iommu_domain *domain, |
46 | unsigned long cap); | |
4a77a6cf JR |
47 | }; |
48 | ||
49 | #ifdef CONFIG_IOMMU_API | |
50 | ||
51 | extern void register_iommu(struct iommu_ops *ops); | |
52 | extern bool iommu_found(void); | |
53 | extern struct iommu_domain *iommu_domain_alloc(void); | |
54 | extern void iommu_domain_free(struct iommu_domain *domain); | |
55 | extern int iommu_attach_device(struct iommu_domain *domain, | |
56 | struct device *dev); | |
57 | extern void iommu_detach_device(struct iommu_domain *domain, | |
58 | struct device *dev); | |
59 | extern int iommu_map_range(struct iommu_domain *domain, unsigned long iova, | |
60 | phys_addr_t paddr, size_t size, int prot); | |
61 | extern void iommu_unmap_range(struct iommu_domain *domain, unsigned long iova, | |
62 | size_t size); | |
63 | extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, | |
64 | unsigned long iova); | |
dbb9fd86 SY |
65 | extern int iommu_domain_has_cap(struct iommu_domain *domain, |
66 | unsigned long cap); | |
4a77a6cf JR |
67 | |
68 | #else /* CONFIG_IOMMU_API */ | |
69 | ||
70 | static inline void register_iommu(struct iommu_ops *ops) | |
71 | { | |
72 | } | |
73 | ||
74 | static inline bool iommu_found(void) | |
75 | { | |
76 | return false; | |
77 | } | |
78 | ||
79 | static inline struct iommu_domain *iommu_domain_alloc(void) | |
80 | { | |
81 | return NULL; | |
82 | } | |
83 | ||
84 | static inline void iommu_domain_free(struct iommu_domain *domain) | |
85 | { | |
86 | } | |
87 | ||
88 | static inline int iommu_attach_device(struct iommu_domain *domain, | |
89 | struct device *dev) | |
90 | { | |
91 | return -ENODEV; | |
92 | } | |
93 | ||
94 | static inline void iommu_detach_device(struct iommu_domain *domain, | |
95 | struct device *dev) | |
96 | { | |
97 | } | |
98 | ||
99 | static inline int iommu_map_range(struct iommu_domain *domain, | |
100 | unsigned long iova, phys_addr_t paddr, | |
101 | size_t size, int prot) | |
102 | { | |
103 | return -ENODEV; | |
104 | } | |
105 | ||
106 | static inline void iommu_unmap_range(struct iommu_domain *domain, | |
107 | unsigned long iova, size_t size) | |
108 | { | |
109 | } | |
110 | ||
111 | static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, | |
112 | unsigned long iova) | |
113 | { | |
114 | return 0; | |
115 | } | |
116 | ||
dbb9fd86 SY |
117 | static inline int domain_has_cap(struct iommu_domain *domain, |
118 | unsigned long cap) | |
119 | { | |
120 | return 0; | |
121 | } | |
122 | ||
4a77a6cf JR |
123 | #endif /* CONFIG_IOMMU_API */ |
124 | ||
125 | #endif /* __LINUX_IOMMU_H */ |