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 #include <linux/errno.h>
24 #define IOMMU_READ (1)
25 #define IOMMU_WRITE (2)
26 #define IOMMU_CACHE (4) /* DMA cache coherency */
33 struct iommu_ops *ops;
37 #define IOMMU_CAP_CACHE_COHERENCY 0x1
38 #define IOMMU_CAP_INTR_REMAP 0x2 /* isolates device intrs */
40 #ifdef CONFIG_IOMMU_API
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);
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,
51 phys_addr_t (*iova_to_phys)(struct iommu_domain *domain,
53 int (*domain_has_cap)(struct iommu_domain *domain,
57 extern void register_iommu(struct iommu_ops *ops);
58 extern int bus_set_iommu(struct bus_type *bus, struct iommu_ops *ops);
59 extern bool iommu_present(struct bus_type *bus);
60 extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
61 extern void iommu_domain_free(struct iommu_domain *domain);
62 extern int iommu_attach_device(struct iommu_domain *domain,
64 extern void iommu_detach_device(struct iommu_domain *domain,
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,
70 extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
72 extern int iommu_domain_has_cap(struct iommu_domain *domain,
75 #else /* CONFIG_IOMMU_API */
79 static inline bool iommu_present(struct bus_type *bus)
84 static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
89 static inline void iommu_domain_free(struct iommu_domain *domain)
93 static inline int iommu_attach_device(struct iommu_domain *domain,
99 static inline void iommu_detach_device(struct iommu_domain *domain,
104 static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
105 phys_addr_t paddr, int gfp_order, int prot)
110 static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova,
116 static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
122 static inline int domain_has_cap(struct iommu_domain *domain,
128 #endif /* CONFIG_IOMMU_API */
130 #endif /* __LINUX_IOMMU_H */