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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 | ||
74315ccc LA |
22 | #include <linux/errno.h> |
23 | ||
4a77a6cf JR |
24 | #define IOMMU_READ (1) |
25 | #define IOMMU_WRITE (2) | |
9cf06697 | 26 | #define IOMMU_CACHE (4) /* DMA cache coherency */ |
4a77a6cf | 27 | |
ff21776d | 28 | struct bus_type; |
4a77a6cf JR |
29 | struct device; |
30 | ||
31 | struct iommu_domain { | |
32 | void *priv; | |
33 | }; | |
34 | ||
dbb9fd86 | 35 | #define IOMMU_CAP_CACHE_COHERENCY 0x1 |
323f99cb | 36 | #define IOMMU_CAP_INTR_REMAP 0x2 /* isolates device intrs */ |
dbb9fd86 | 37 | |
39d4ebb9 JR |
38 | #ifdef CONFIG_IOMMU_API |
39 | ||
4a77a6cf JR |
40 | struct iommu_ops { |
41 | int (*domain_init)(struct iommu_domain *domain); | |
42 | void (*domain_destroy)(struct iommu_domain *domain); | |
43 | int (*attach_dev)(struct iommu_domain *domain, struct device *dev); | |
44 | void (*detach_dev)(struct iommu_domain *domain, struct device *dev); | |
67651786 JR |
45 | int (*map)(struct iommu_domain *domain, unsigned long iova, |
46 | phys_addr_t paddr, int gfp_order, int prot); | |
47 | int (*unmap)(struct iommu_domain *domain, unsigned long iova, | |
48 | int gfp_order); | |
4a77a6cf JR |
49 | phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, |
50 | unsigned long iova); | |
dbb9fd86 SY |
51 | int (*domain_has_cap)(struct iommu_domain *domain, |
52 | unsigned long cap); | |
4a77a6cf JR |
53 | }; |
54 | ||
4a77a6cf | 55 | extern void register_iommu(struct iommu_ops *ops); |
ff21776d | 56 | extern int bus_set_iommu(struct bus_type *bus, struct iommu_ops *ops); |
4a77a6cf JR |
57 | extern bool iommu_found(void); |
58 | extern struct iommu_domain *iommu_domain_alloc(void); | |
59 | extern void iommu_domain_free(struct iommu_domain *domain); | |
60 | extern int iommu_attach_device(struct iommu_domain *domain, | |
61 | struct device *dev); | |
62 | extern void iommu_detach_device(struct iommu_domain *domain, | |
63 | struct device *dev); | |
cefc53c7 JR |
64 | extern int iommu_map(struct iommu_domain *domain, unsigned long iova, |
65 | phys_addr_t paddr, int gfp_order, int prot); | |
66 | extern int iommu_unmap(struct iommu_domain *domain, unsigned long iova, | |
67 | int gfp_order); | |
4a77a6cf JR |
68 | extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, |
69 | unsigned long iova); | |
dbb9fd86 SY |
70 | extern int iommu_domain_has_cap(struct iommu_domain *domain, |
71 | unsigned long cap); | |
4a77a6cf JR |
72 | |
73 | #else /* CONFIG_IOMMU_API */ | |
74 | ||
39d4ebb9 | 75 | struct iommu_ops {}; |
4a77a6cf JR |
76 | |
77 | static inline bool iommu_found(void) | |
78 | { | |
79 | return false; | |
80 | } | |
81 | ||
82 | static inline struct iommu_domain *iommu_domain_alloc(void) | |
83 | { | |
84 | return NULL; | |
85 | } | |
86 | ||
87 | static inline void iommu_domain_free(struct iommu_domain *domain) | |
88 | { | |
89 | } | |
90 | ||
91 | static inline int iommu_attach_device(struct iommu_domain *domain, | |
92 | struct device *dev) | |
93 | { | |
94 | return -ENODEV; | |
95 | } | |
96 | ||
97 | static inline void iommu_detach_device(struct iommu_domain *domain, | |
98 | struct device *dev) | |
99 | { | |
100 | } | |
101 | ||
cefc53c7 JR |
102 | static inline int iommu_map(struct iommu_domain *domain, unsigned long iova, |
103 | phys_addr_t paddr, int gfp_order, int prot) | |
104 | { | |
105 | return -ENODEV; | |
106 | } | |
107 | ||
108 | static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova, | |
109 | int gfp_order) | |
110 | { | |
111 | return -ENODEV; | |
112 | } | |
113 | ||
4a77a6cf JR |
114 | static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, |
115 | unsigned long iova) | |
116 | { | |
117 | return 0; | |
118 | } | |
119 | ||
dbb9fd86 SY |
120 | static inline int domain_has_cap(struct iommu_domain *domain, |
121 | unsigned long cap) | |
122 | { | |
123 | return 0; | |
124 | } | |
125 | ||
4a77a6cf JR |
126 | #endif /* CONFIG_IOMMU_API */ |
127 | ||
128 | #endif /* __LINUX_IOMMU_H */ |