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 #include <linux/kernel.h>
20 #include <linux/bug.h>
21 #include <linux/types.h>
22 #include <linux/module.h>
23 #include <linux/slab.h>
24 #include <linux/errno.h>
25 #include <linux/iommu.h>
27 static struct iommu_ops *iommu_ops;
29 void register_iommu(struct iommu_ops *ops)
37 bool iommu_found(void)
39 return iommu_ops != NULL;
41 EXPORT_SYMBOL_GPL(iommu_found);
43 struct iommu_domain *iommu_domain_alloc(void)
45 struct iommu_domain *domain;
48 domain = kmalloc(sizeof(*domain), GFP_KERNEL);
52 ret = iommu_ops->domain_init(domain);
63 EXPORT_SYMBOL_GPL(iommu_domain_alloc);
65 void iommu_domain_free(struct iommu_domain *domain)
67 iommu_ops->domain_destroy(domain);
70 EXPORT_SYMBOL_GPL(iommu_domain_free);
72 int iommu_attach_device(struct iommu_domain *domain, struct device *dev)
74 return iommu_ops->attach_dev(domain, dev);
76 EXPORT_SYMBOL_GPL(iommu_attach_device);
78 void iommu_detach_device(struct iommu_domain *domain, struct device *dev)
80 iommu_ops->detach_dev(domain, dev);
82 EXPORT_SYMBOL_GPL(iommu_detach_device);
84 phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
87 return iommu_ops->iova_to_phys(domain, iova);
89 EXPORT_SYMBOL_GPL(iommu_iova_to_phys);
91 int iommu_domain_has_cap(struct iommu_domain *domain,
94 return iommu_ops->domain_has_cap(domain, cap);
96 EXPORT_SYMBOL_GPL(iommu_domain_has_cap);
98 int iommu_map(struct iommu_domain *domain, unsigned long iova,
99 phys_addr_t paddr, int gfp_order, int prot)
103 size = PAGE_SIZE << gfp_order;
105 BUG_ON(!IS_ALIGNED(iova | paddr, size));
107 return iommu_ops->map(domain, iova, paddr, gfp_order, prot);
109 EXPORT_SYMBOL_GPL(iommu_map);
111 int iommu_unmap(struct iommu_domain *domain, unsigned long iova, int gfp_order)
115 size = PAGE_SIZE << gfp_order;
117 BUG_ON(!IS_ALIGNED(iova, size));
119 return iommu_ops->unmap(domain, iova, gfp_order);
121 EXPORT_SYMBOL_GPL(iommu_unmap);