Joerg Roedel | fc2100e | 2008-11-26 17:21:24 +0100 | [diff] [blame] | 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 | |
Ohad Ben-Cohen | 4099818 | 2011-09-02 13:32:32 -0400 | [diff] [blame^] | 19 | #include <linux/kernel.h> |
Joerg Roedel | fc2100e | 2008-11-26 17:21:24 +0100 | [diff] [blame] | 20 | #include <linux/bug.h> |
| 21 | #include <linux/types.h> |
Andrew Morton | 60db402 | 2009-05-06 16:03:07 -0700 | [diff] [blame] | 22 | #include <linux/module.h> |
| 23 | #include <linux/slab.h> |
Joerg Roedel | fc2100e | 2008-11-26 17:21:24 +0100 | [diff] [blame] | 24 | #include <linux/errno.h> |
| 25 | #include <linux/iommu.h> |
| 26 | |
| 27 | static struct iommu_ops *iommu_ops; |
| 28 | |
| 29 | void register_iommu(struct iommu_ops *ops) |
| 30 | { |
| 31 | if (iommu_ops) |
| 32 | BUG(); |
| 33 | |
| 34 | iommu_ops = ops; |
| 35 | } |
| 36 | |
Hannes Eder | ff2c8a4 | 2009-03-05 12:12:44 +0100 | [diff] [blame] | 37 | bool iommu_found(void) |
Joerg Roedel | fc2100e | 2008-11-26 17:21:24 +0100 | [diff] [blame] | 38 | { |
| 39 | return iommu_ops != NULL; |
| 40 | } |
| 41 | EXPORT_SYMBOL_GPL(iommu_found); |
| 42 | |
| 43 | struct iommu_domain *iommu_domain_alloc(void) |
| 44 | { |
| 45 | struct iommu_domain *domain; |
| 46 | int ret; |
| 47 | |
| 48 | domain = kmalloc(sizeof(*domain), GFP_KERNEL); |
| 49 | if (!domain) |
| 50 | return NULL; |
| 51 | |
| 52 | ret = iommu_ops->domain_init(domain); |
| 53 | if (ret) |
| 54 | goto out_free; |
| 55 | |
| 56 | return domain; |
| 57 | |
| 58 | out_free: |
| 59 | kfree(domain); |
| 60 | |
| 61 | return NULL; |
| 62 | } |
| 63 | EXPORT_SYMBOL_GPL(iommu_domain_alloc); |
| 64 | |
| 65 | void iommu_domain_free(struct iommu_domain *domain) |
| 66 | { |
| 67 | iommu_ops->domain_destroy(domain); |
| 68 | kfree(domain); |
| 69 | } |
| 70 | EXPORT_SYMBOL_GPL(iommu_domain_free); |
| 71 | |
| 72 | int iommu_attach_device(struct iommu_domain *domain, struct device *dev) |
| 73 | { |
| 74 | return iommu_ops->attach_dev(domain, dev); |
| 75 | } |
| 76 | EXPORT_SYMBOL_GPL(iommu_attach_device); |
| 77 | |
| 78 | void iommu_detach_device(struct iommu_domain *domain, struct device *dev) |
| 79 | { |
| 80 | iommu_ops->detach_dev(domain, dev); |
| 81 | } |
| 82 | EXPORT_SYMBOL_GPL(iommu_detach_device); |
| 83 | |
Joerg Roedel | fc2100e | 2008-11-26 17:21:24 +0100 | [diff] [blame] | 84 | phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, |
| 85 | unsigned long iova) |
| 86 | { |
| 87 | return iommu_ops->iova_to_phys(domain, iova); |
| 88 | } |
| 89 | EXPORT_SYMBOL_GPL(iommu_iova_to_phys); |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 90 | |
| 91 | int iommu_domain_has_cap(struct iommu_domain *domain, |
| 92 | unsigned long cap) |
| 93 | { |
| 94 | return iommu_ops->domain_has_cap(domain, cap); |
| 95 | } |
| 96 | EXPORT_SYMBOL_GPL(iommu_domain_has_cap); |
Joerg Roedel | cefc53c | 2010-01-08 13:35:09 +0100 | [diff] [blame] | 97 | |
| 98 | int iommu_map(struct iommu_domain *domain, unsigned long iova, |
| 99 | phys_addr_t paddr, int gfp_order, int prot) |
| 100 | { |
Joerg Roedel | cefc53c | 2010-01-08 13:35:09 +0100 | [diff] [blame] | 101 | size_t size; |
| 102 | |
| 103 | size = 0x1000UL << gfp_order; |
Joerg Roedel | cefc53c | 2010-01-08 13:35:09 +0100 | [diff] [blame] | 104 | |
Ohad Ben-Cohen | 4099818 | 2011-09-02 13:32:32 -0400 | [diff] [blame^] | 105 | BUG_ON(!IS_ALIGNED(iova | paddr, size)); |
Joerg Roedel | cefc53c | 2010-01-08 13:35:09 +0100 | [diff] [blame] | 106 | |
Joerg Roedel | 12c7389 | 2010-01-21 11:50:28 +0100 | [diff] [blame] | 107 | return iommu_ops->map(domain, iova, paddr, gfp_order, prot); |
Joerg Roedel | cefc53c | 2010-01-08 13:35:09 +0100 | [diff] [blame] | 108 | } |
| 109 | EXPORT_SYMBOL_GPL(iommu_map); |
| 110 | |
| 111 | int iommu_unmap(struct iommu_domain *domain, unsigned long iova, int gfp_order) |
| 112 | { |
Joerg Roedel | cefc53c | 2010-01-08 13:35:09 +0100 | [diff] [blame] | 113 | size_t size; |
| 114 | |
| 115 | size = 0x1000UL << gfp_order; |
Joerg Roedel | cefc53c | 2010-01-08 13:35:09 +0100 | [diff] [blame] | 116 | |
Ohad Ben-Cohen | 4099818 | 2011-09-02 13:32:32 -0400 | [diff] [blame^] | 117 | BUG_ON(!IS_ALIGNED(iova, size)); |
Joerg Roedel | cefc53c | 2010-01-08 13:35:09 +0100 | [diff] [blame] | 118 | |
Joerg Roedel | 12c7389 | 2010-01-21 11:50:28 +0100 | [diff] [blame] | 119 | return iommu_ops->unmap(domain, iova, gfp_order); |
Joerg Roedel | cefc53c | 2010-01-08 13:35:09 +0100 | [diff] [blame] | 120 | } |
| 121 | EXPORT_SYMBOL_GPL(iommu_unmap); |