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fc2100eb JR |
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 | #include <linux/bug.h> | |
20 | #include <linux/types.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/iommu.h> | |
23 | ||
24 | static struct iommu_ops *iommu_ops; | |
25 | ||
26 | void register_iommu(struct iommu_ops *ops) | |
27 | { | |
28 | if (iommu_ops) | |
29 | BUG(); | |
30 | ||
31 | iommu_ops = ops; | |
32 | } | |
33 | ||
34 | bool iommu_found() | |
35 | { | |
36 | return iommu_ops != NULL; | |
37 | } | |
38 | EXPORT_SYMBOL_GPL(iommu_found); | |
39 | ||
40 | struct iommu_domain *iommu_domain_alloc(void) | |
41 | { | |
42 | struct iommu_domain *domain; | |
43 | int ret; | |
44 | ||
45 | domain = kmalloc(sizeof(*domain), GFP_KERNEL); | |
46 | if (!domain) | |
47 | return NULL; | |
48 | ||
49 | ret = iommu_ops->domain_init(domain); | |
50 | if (ret) | |
51 | goto out_free; | |
52 | ||
53 | return domain; | |
54 | ||
55 | out_free: | |
56 | kfree(domain); | |
57 | ||
58 | return NULL; | |
59 | } | |
60 | EXPORT_SYMBOL_GPL(iommu_domain_alloc); | |
61 | ||
62 | void iommu_domain_free(struct iommu_domain *domain) | |
63 | { | |
64 | iommu_ops->domain_destroy(domain); | |
65 | kfree(domain); | |
66 | } | |
67 | EXPORT_SYMBOL_GPL(iommu_domain_free); | |
68 | ||
69 | int iommu_attach_device(struct iommu_domain *domain, struct device *dev) | |
70 | { | |
71 | return iommu_ops->attach_dev(domain, dev); | |
72 | } | |
73 | EXPORT_SYMBOL_GPL(iommu_attach_device); | |
74 | ||
75 | void iommu_detach_device(struct iommu_domain *domain, struct device *dev) | |
76 | { | |
77 | iommu_ops->detach_dev(domain, dev); | |
78 | } | |
79 | EXPORT_SYMBOL_GPL(iommu_detach_device); | |
80 | ||
81 | int iommu_map_range(struct iommu_domain *domain, unsigned long iova, | |
82 | phys_addr_t paddr, size_t size, int prot) | |
83 | { | |
84 | return iommu_ops->map(domain, iova, paddr, size, prot); | |
85 | } | |
86 | EXPORT_SYMBOL_GPL(iommu_map_range); | |
87 | ||
88 | void iommu_unmap_range(struct iommu_domain *domain, unsigned long iova, | |
89 | size_t size) | |
90 | { | |
91 | iommu_ops->unmap(domain, iova, size); | |
92 | } | |
93 | EXPORT_SYMBOL_GPL(iommu_unmap_range); | |
94 | ||
95 | phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, | |
96 | unsigned long iova) | |
97 | { | |
98 | return iommu_ops->iova_to_phys(domain, iova); | |
99 | } | |
100 | EXPORT_SYMBOL_GPL(iommu_iova_to_phys); |