projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 4a77a6cf JR |
1 | /* |
| 2 | * Copyright (C) 2007-2008 Advanced Micro Devices, Inc. | |
| 3 | * Author: Joerg Roedel <[email protected]> | |
| 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 | 32 | #define IOMMU_CAP_CACHE_COHERENCY 0x1 |
| 323f99cb | 33 | #define IOMMU_CAP_INTR_REMAP 0x2 /* isolates device intrs */ |
| dbb9fd86 | 34 | |
| 4a77a6cf JR |
35 | struct iommu_ops { |
| 36 | int (*domain_init)(struct iommu_domain *domain); | |
| 37 | void (*domain_destroy)(struct iommu_domain *domain); | |
| 38 | int (*attach_dev)(struct iommu_domain *domain, struct device *dev); | |
| 39 | void (*detach_dev)(struct iommu_domain *domain, struct device *dev); | |
| 67651786 JR |
40 | int (*map)(struct iommu_domain *domain, unsigned long iova, |
| 41 | phys_addr_t paddr, int gfp_order, int prot); | |
| 42 | int (*unmap)(struct iommu_domain *domain, unsigned long iova, | |
| 43 | int gfp_order); | |
| 4a77a6cf JR |
44 | phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, |
| 45 | unsigned long iova); | |
| dbb9fd86 SY |
46 | int (*domain_has_cap)(struct iommu_domain *domain, |
| 47 | unsigned long cap); | |
| 4a77a6cf JR |
48 | }; |
| 49 | ||
| 50 | #ifdef CONFIG_IOMMU_API | |
| 51 | ||
| 52 | extern void register_iommu(struct iommu_ops *ops); | |
| 53 | extern bool iommu_found(void); | |
| 54 | extern struct iommu_domain *iommu_domain_alloc(void); | |
| 55 | extern void iommu_domain_free(struct iommu_domain *domain); | |
| 56 | extern int iommu_attach_device(struct iommu_domain *domain, | |
| 57 | struct device *dev); | |
| 58 | extern void iommu_detach_device(struct iommu_domain *domain, | |
| 59 | struct device *dev); | |
| cefc53c7 JR |
60 | extern int iommu_map(struct iommu_domain *domain, unsigned long iova, |
| 61 | phys_addr_t paddr, int gfp_order, int prot); | |
| 62 | extern int iommu_unmap(struct iommu_domain *domain, unsigned long iova, | |
| 63 | int gfp_order); | |
| 4a77a6cf JR |
64 | extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, |
| 65 | unsigned long iova); | |
| dbb9fd86 SY |
66 | extern int iommu_domain_has_cap(struct iommu_domain *domain, |
| 67 | unsigned long cap); | |
| 4a77a6cf JR |
68 | |
| 69 | #else /* CONFIG_IOMMU_API */ | |
| 70 | ||
| 71 | static inline void register_iommu(struct iommu_ops *ops) | |
| 72 | { | |
| 73 | } | |
| 74 | ||
| 75 | static inline bool iommu_found(void) | |
| 76 | { | |
| 77 | return false; | |
| 78 | } | |
| 79 | ||
| 80 | static inline struct iommu_domain *iommu_domain_alloc(void) | |
| 81 | { | |
| 82 | return NULL; | |
| 83 | } | |
| 84 | ||
| 85 | static inline void iommu_domain_free(struct iommu_domain *domain) | |
| 86 | { | |
| 87 | } | |
| 88 | ||
| 89 | static inline int iommu_attach_device(struct iommu_domain *domain, | |
| 90 | struct device *dev) | |
| 91 | { | |
| 92 | return -ENODEV; | |
| 93 | } | |
| 94 | ||
| 95 | static inline void iommu_detach_device(struct iommu_domain *domain, | |
| 96 | struct device *dev) | |
| 97 | { | |
| 98 | } | |
| 99 | ||
| cefc53c7 JR |
100 | static inline int iommu_map(struct iommu_domain *domain, unsigned long iova, |
| 101 | phys_addr_t paddr, int gfp_order, int prot) | |
| 102 | { | |
| 103 | return -ENODEV; | |
| 104 | } | |
| 105 | ||
| 106 | static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova, | |
| 107 | int gfp_order) | |
| 108 | { | |
| 109 | return -ENODEV; | |
| 110 | } | |
| 111 | ||
| 4a77a6cf JR |
112 | static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, |
| 113 | unsigned long iova) | |
| 114 | { | |
| 115 | return 0; | |
| 116 | } | |
| 117 | ||
| dbb9fd86 SY |
118 | static inline int domain_has_cap(struct iommu_domain *domain, |
| 119 | unsigned long cap) | |
| 120 | { | |
| 121 | return 0; | |
| 122 | } | |
| 123 | ||
| 4a77a6cf JR |
124 | #endif /* CONFIG_IOMMU_API */ |
| 125 | ||
| 126 | #endif /* __LINUX_IOMMU_H */ |