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 | |
Laura Abbott | 74315cc | 2011-06-08 17:29:11 -0400 | [diff] [blame] | 22 | #include <linux/errno.h> |
| 23 | |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 24 | #define IOMMU_READ (1) |
| 25 | #define IOMMU_WRITE (2) |
Sheng Yang | 9cf0669 | 2009-03-18 15:33:07 +0800 | [diff] [blame] | 26 | #define IOMMU_CACHE (4) /* DMA cache coherency */ |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 27 | |
Joerg Roedel | 905d66c | 2011-09-06 16:03:26 +0200 | [diff] [blame^] | 28 | struct iommu_ops; |
Joerg Roedel | ff21776 | 2011-08-26 16:48:26 +0200 | [diff] [blame] | 29 | struct bus_type; |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 30 | struct device; |
| 31 | |
| 32 | struct iommu_domain { |
Joerg Roedel | 905d66c | 2011-09-06 16:03:26 +0200 | [diff] [blame^] | 33 | struct iommu_ops *ops; |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 34 | void *priv; |
| 35 | }; |
| 36 | |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 37 | #define IOMMU_CAP_CACHE_COHERENCY 0x1 |
Tom Lyon | 323f99c | 2010-07-02 16:56:14 -0400 | [diff] [blame] | 38 | #define IOMMU_CAP_INTR_REMAP 0x2 /* isolates device intrs */ |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 39 | |
Joerg Roedel | 39d4ebb | 2011-09-06 16:48:40 +0200 | [diff] [blame] | 40 | #ifdef CONFIG_IOMMU_API |
| 41 | |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 42 | struct iommu_ops { |
| 43 | int (*domain_init)(struct iommu_domain *domain); |
| 44 | void (*domain_destroy)(struct iommu_domain *domain); |
| 45 | int (*attach_dev)(struct iommu_domain *domain, struct device *dev); |
| 46 | void (*detach_dev)(struct iommu_domain *domain, struct device *dev); |
Joerg Roedel | 6765178 | 2010-01-21 16:32:27 +0100 | [diff] [blame] | 47 | int (*map)(struct iommu_domain *domain, unsigned long iova, |
| 48 | phys_addr_t paddr, int gfp_order, int prot); |
| 49 | int (*unmap)(struct iommu_domain *domain, unsigned long iova, |
| 50 | int gfp_order); |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 51 | phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, |
| 52 | unsigned long iova); |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 53 | int (*domain_has_cap)(struct iommu_domain *domain, |
| 54 | unsigned long cap); |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 55 | }; |
| 56 | |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 57 | extern void register_iommu(struct iommu_ops *ops); |
Joerg Roedel | ff21776 | 2011-08-26 16:48:26 +0200 | [diff] [blame] | 58 | extern int bus_set_iommu(struct bus_type *bus, struct iommu_ops *ops); |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 59 | extern bool iommu_found(void); |
Joerg Roedel | 905d66c | 2011-09-06 16:03:26 +0200 | [diff] [blame^] | 60 | extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus); |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 61 | extern void iommu_domain_free(struct iommu_domain *domain); |
| 62 | extern int iommu_attach_device(struct iommu_domain *domain, |
| 63 | struct device *dev); |
| 64 | extern void iommu_detach_device(struct iommu_domain *domain, |
| 65 | struct device *dev); |
Joerg Roedel | cefc53c | 2010-01-08 13:35:09 +0100 | [diff] [blame] | 66 | extern int iommu_map(struct iommu_domain *domain, unsigned long iova, |
| 67 | phys_addr_t paddr, int gfp_order, int prot); |
| 68 | extern int iommu_unmap(struct iommu_domain *domain, unsigned long iova, |
| 69 | int gfp_order); |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 70 | extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, |
| 71 | unsigned long iova); |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 72 | extern int iommu_domain_has_cap(struct iommu_domain *domain, |
| 73 | unsigned long cap); |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 74 | |
| 75 | #else /* CONFIG_IOMMU_API */ |
| 76 | |
Joerg Roedel | 39d4ebb | 2011-09-06 16:48:40 +0200 | [diff] [blame] | 77 | struct iommu_ops {}; |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 78 | |
| 79 | static inline bool iommu_found(void) |
| 80 | { |
| 81 | return false; |
| 82 | } |
| 83 | |
Joerg Roedel | 905d66c | 2011-09-06 16:03:26 +0200 | [diff] [blame^] | 84 | static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus) |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 85 | { |
| 86 | return NULL; |
| 87 | } |
| 88 | |
| 89 | static inline void iommu_domain_free(struct iommu_domain *domain) |
| 90 | { |
| 91 | } |
| 92 | |
| 93 | static inline int iommu_attach_device(struct iommu_domain *domain, |
| 94 | struct device *dev) |
| 95 | { |
| 96 | return -ENODEV; |
| 97 | } |
| 98 | |
| 99 | static inline void iommu_detach_device(struct iommu_domain *domain, |
| 100 | struct device *dev) |
| 101 | { |
| 102 | } |
| 103 | |
Joerg Roedel | cefc53c | 2010-01-08 13:35:09 +0100 | [diff] [blame] | 104 | static inline int iommu_map(struct iommu_domain *domain, unsigned long iova, |
| 105 | phys_addr_t paddr, int gfp_order, int prot) |
| 106 | { |
| 107 | return -ENODEV; |
| 108 | } |
| 109 | |
| 110 | static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova, |
| 111 | int gfp_order) |
| 112 | { |
| 113 | return -ENODEV; |
| 114 | } |
| 115 | |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 116 | static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, |
| 117 | unsigned long iova) |
| 118 | { |
| 119 | return 0; |
| 120 | } |
| 121 | |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 122 | static inline int domain_has_cap(struct iommu_domain *domain, |
| 123 | unsigned long cap) |
| 124 | { |
| 125 | return 0; |
| 126 | } |
| 127 | |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 128 | #endif /* CONFIG_IOMMU_API */ |
| 129 | |
| 130 | #endif /* __LINUX_IOMMU_H */ |