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, int gfp_order, int prot);
41 int (*unmap)(struct iommu_domain *domain, unsigned long iova,
43 int (*map_range)(struct iommu_domain *domain, unsigned long iova,
44 phys_addr_t paddr, size_t size, int prot);
45 void (*unmap_range)(struct iommu_domain *domain, unsigned long iova,
47 phys_addr_t (*iova_to_phys)(struct iommu_domain *domain,
49 int (*domain_has_cap)(struct iommu_domain *domain,
53 #ifdef CONFIG_IOMMU_API
55 extern void register_iommu(struct iommu_ops *ops);
56 extern bool iommu_found(void);
57 extern struct iommu_domain *iommu_domain_alloc(void);
58 extern void iommu_domain_free(struct iommu_domain *domain);
59 extern int iommu_attach_device(struct iommu_domain *domain,
61 extern void iommu_detach_device(struct iommu_domain *domain,
63 extern int iommu_map_range(struct iommu_domain *domain, unsigned long iova,
64 phys_addr_t paddr, size_t size, int prot);
65 extern void iommu_unmap_range(struct iommu_domain *domain, unsigned long iova,
67 extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
68 phys_addr_t paddr, int gfp_order, int prot);
69 extern int iommu_unmap(struct iommu_domain *domain, unsigned long iova,
71 extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
73 extern int iommu_domain_has_cap(struct iommu_domain *domain,
76 #else /* CONFIG_IOMMU_API */
78 static inline void register_iommu(struct iommu_ops *ops)
82 static inline bool iommu_found(void)
87 static inline struct iommu_domain *iommu_domain_alloc(void)
92 static inline void iommu_domain_free(struct iommu_domain *domain)
96 static inline int iommu_attach_device(struct iommu_domain *domain,
102 static inline void iommu_detach_device(struct iommu_domain *domain,
107 static inline int iommu_map_range(struct iommu_domain *domain,
108 unsigned long iova, phys_addr_t paddr,
109 size_t size, int prot)
114 static inline void iommu_unmap_range(struct iommu_domain *domain,
115 unsigned long iova, size_t size)
119 static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
120 phys_addr_t paddr, int gfp_order, int prot)
125 static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova,
131 static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
137 static inline int domain_has_cap(struct iommu_domain *domain,
143 #endif /* CONFIG_IOMMU_API */
145 #endif /* __LINUX_IOMMU_H */