| Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 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) |
| 24 | |
| 25 | struct device; |
| 26 | |
| 27 | struct iommu_domain { |
| 28 | void *priv; |
| 29 | }; |
| 30 | |
| 31 | struct iommu_ops { |
| 32 | int (*domain_init)(struct iommu_domain *domain); |
| 33 | void (*domain_destroy)(struct iommu_domain *domain); |
| 34 | int (*attach_dev)(struct iommu_domain *domain, struct device *dev); |
| 35 | void (*detach_dev)(struct iommu_domain *domain, struct device *dev); |
| 36 | int (*map)(struct iommu_domain *domain, unsigned long iova, |
| 37 | phys_addr_t paddr, size_t size, int prot); |
| 38 | void (*unmap)(struct iommu_domain *domain, unsigned long iova, |
| 39 | size_t size); |
| 40 | phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, |
| 41 | unsigned long iova); |
| 42 | }; |
| 43 | |
| 44 | #ifdef CONFIG_IOMMU_API |
| 45 | |
| 46 | extern void register_iommu(struct iommu_ops *ops); |
| 47 | extern bool iommu_found(void); |
| 48 | extern struct iommu_domain *iommu_domain_alloc(void); |
| 49 | extern void iommu_domain_free(struct iommu_domain *domain); |
| 50 | extern int iommu_attach_device(struct iommu_domain *domain, |
| 51 | struct device *dev); |
| 52 | extern void iommu_detach_device(struct iommu_domain *domain, |
| 53 | struct device *dev); |
| 54 | extern int iommu_map_range(struct iommu_domain *domain, unsigned long iova, |
| 55 | phys_addr_t paddr, size_t size, int prot); |
| 56 | extern void iommu_unmap_range(struct iommu_domain *domain, unsigned long iova, |
| 57 | size_t size); |
| 58 | extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, |
| 59 | unsigned long iova); |
| 60 | |
| 61 | #else /* CONFIG_IOMMU_API */ |
| 62 | |
| 63 | static inline void register_iommu(struct iommu_ops *ops) |
| 64 | { |
| 65 | } |
| 66 | |
| 67 | static inline bool iommu_found(void) |
| 68 | { |
| 69 | return false; |
| 70 | } |
| 71 | |
| 72 | static inline struct iommu_domain *iommu_domain_alloc(void) |
| 73 | { |
| 74 | return NULL; |
| 75 | } |
| 76 | |
| 77 | static inline void iommu_domain_free(struct iommu_domain *domain) |
| 78 | { |
| 79 | } |
| 80 | |
| 81 | static inline int iommu_attach_device(struct iommu_domain *domain, |
| 82 | struct device *dev) |
| 83 | { |
| 84 | return -ENODEV; |
| 85 | } |
| 86 | |
| 87 | static inline void iommu_detach_device(struct iommu_domain *domain, |
| 88 | struct device *dev) |
| 89 | { |
| 90 | } |
| 91 | |
| 92 | static inline int iommu_map_range(struct iommu_domain *domain, |
| 93 | unsigned long iova, phys_addr_t paddr, |
| 94 | size_t size, int prot) |
| 95 | { |
| 96 | return -ENODEV; |
| 97 | } |
| 98 | |
| 99 | static inline void iommu_unmap_range(struct iommu_domain *domain, |
| 100 | unsigned long iova, size_t size) |
| 101 | { |
| 102 | } |
| 103 | |
| 104 | static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, |
| 105 | unsigned long iova) |
| 106 | { |
| 107 | return 0; |
| 108 | } |
| 109 | |
| 110 | #endif /* CONFIG_IOMMU_API */ |
| 111 | |
| 112 | #endif /* __LINUX_IOMMU_H */ |