projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 */ |