blob: 6e6b6a11b3ced64d1c90e3c9d35d25823f6b5ccf [file] [log] [blame]
Joerg Roedelfc2100e2008-11-26 17:21:24 +01001/*
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>
Andrew Morton60db4022009-05-06 16:03:07 -070021#include <linux/module.h>
22#include <linux/slab.h>
Joerg Roedelfc2100e2008-11-26 17:21:24 +010023#include <linux/errno.h>
24#include <linux/iommu.h>
25
26static struct iommu_ops *iommu_ops;
27
28void register_iommu(struct iommu_ops *ops)
29{
30 if (iommu_ops)
31 BUG();
32
33 iommu_ops = ops;
34}
35
Hannes Ederff2c8a42009-03-05 12:12:44 +010036bool iommu_found(void)
Joerg Roedelfc2100e2008-11-26 17:21:24 +010037{
38 return iommu_ops != NULL;
39}
40EXPORT_SYMBOL_GPL(iommu_found);
41
42struct iommu_domain *iommu_domain_alloc(void)
43{
44 struct iommu_domain *domain;
45 int ret;
46
47 domain = kmalloc(sizeof(*domain), GFP_KERNEL);
48 if (!domain)
49 return NULL;
50
51 ret = iommu_ops->domain_init(domain);
52 if (ret)
53 goto out_free;
54
55 return domain;
56
57out_free:
58 kfree(domain);
59
60 return NULL;
61}
62EXPORT_SYMBOL_GPL(iommu_domain_alloc);
63
64void iommu_domain_free(struct iommu_domain *domain)
65{
66 iommu_ops->domain_destroy(domain);
67 kfree(domain);
68}
69EXPORT_SYMBOL_GPL(iommu_domain_free);
70
71int iommu_attach_device(struct iommu_domain *domain, struct device *dev)
72{
73 return iommu_ops->attach_dev(domain, dev);
74}
75EXPORT_SYMBOL_GPL(iommu_attach_device);
76
77void iommu_detach_device(struct iommu_domain *domain, struct device *dev)
78{
79 iommu_ops->detach_dev(domain, dev);
80}
81EXPORT_SYMBOL_GPL(iommu_detach_device);
82
Joerg Roedelfc2100e2008-11-26 17:21:24 +010083phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
84 unsigned long iova)
85{
86 return iommu_ops->iova_to_phys(domain, iova);
87}
88EXPORT_SYMBOL_GPL(iommu_iova_to_phys);
Sheng Yangdbb9fd82009-03-18 15:33:06 +080089
90int iommu_domain_has_cap(struct iommu_domain *domain,
91 unsigned long cap)
92{
93 return iommu_ops->domain_has_cap(domain, cap);
94}
95EXPORT_SYMBOL_GPL(iommu_domain_has_cap);
Joerg Roedelcefc53c2010-01-08 13:35:09 +010096
97int iommu_map(struct iommu_domain *domain, unsigned long iova,
98 phys_addr_t paddr, int gfp_order, int prot)
99{
100 unsigned long invalid_mask;
101 size_t size;
102
103 size = 0x1000UL << gfp_order;
104 invalid_mask = size - 1;
105
106 BUG_ON((iova | paddr) & invalid_mask);
107
Joerg Roedel12c73892010-01-21 11:50:28 +0100108 return iommu_ops->map(domain, iova, paddr, gfp_order, prot);
Joerg Roedelcefc53c2010-01-08 13:35:09 +0100109}
110EXPORT_SYMBOL_GPL(iommu_map);
111
112int iommu_unmap(struct iommu_domain *domain, unsigned long iova, int gfp_order)
113{
114 unsigned long invalid_mask;
115 size_t size;
116
117 size = 0x1000UL << gfp_order;
118 invalid_mask = size - 1;
119
120 BUG_ON(iova & invalid_mask);
121
Joerg Roedel12c73892010-01-21 11:50:28 +0100122 return iommu_ops->unmap(domain, iova, gfp_order);
Joerg Roedelcefc53c2010-01-08 13:35:09 +0100123}
124EXPORT_SYMBOL_GPL(iommu_unmap);