2 * Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
3 * Author: Joerg Roedel <joerg.roedel@amd.com>
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.
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.
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
19 #ifndef __LINUX_IOMMU_H
20 #define __LINUX_IOMMU_H
22 #define IOMMU_READ (1)
23 #define IOMMU_WRITE (2)
24 #define IOMMU_CACHE (4) /* DMA cache coherency */
32 #define IOMMU_CAP_CACHE_COHERENCY 0x1
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
,
43 phys_addr_t (*iova_to_phys
)(struct iommu_domain
*domain
,
45 int (*domain_has_cap
)(struct iommu_domain
*domain
,
49 #ifdef CONFIG_IOMMU_API
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
,
57 extern void iommu_detach_device(struct iommu_domain
*domain
,
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
,
63 extern phys_addr_t
iommu_iova_to_phys(struct iommu_domain
*domain
,
65 extern int iommu_domain_has_cap(struct iommu_domain
*domain
,
68 #else /* CONFIG_IOMMU_API */
70 static inline void register_iommu(struct iommu_ops
*ops
)
74 static inline bool iommu_found(void)
79 static inline struct iommu_domain
*iommu_domain_alloc(void)
84 static inline void iommu_domain_free(struct iommu_domain
*domain
)
88 static inline int iommu_attach_device(struct iommu_domain
*domain
,
94 static inline void iommu_detach_device(struct iommu_domain
*domain
,
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
)
106 static inline void iommu_unmap_range(struct iommu_domain
*domain
,
107 unsigned long iova
, size_t size
)
111 static inline phys_addr_t
iommu_iova_to_phys(struct iommu_domain
*domain
,
117 static inline int domain_has_cap(struct iommu_domain
*domain
,
123 #endif /* CONFIG_IOMMU_API */
125 #endif /* __LINUX_IOMMU_H */
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