Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +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 | |
| 19 | #ifndef __LINUX_IOMMU_H |
| 20 | #define __LINUX_IOMMU_H |
| 21 | |
Laura Abbott | 74315cc | 2011-06-08 17:29:11 -0400 | [diff] [blame] | 22 | #include <linux/errno.h> |
Wang YanQing | 9a08d37 | 2013-04-19 09:38:04 +0800 | [diff] [blame] | 23 | #include <linux/err.h> |
Thierry Reding | 76582d0 | 2012-07-25 16:24:49 +0200 | [diff] [blame] | 24 | #include <linux/types.h> |
Olav Haugan | 315786e | 2014-10-25 09:55:16 -0700 | [diff] [blame^] | 25 | #include <linux/scatterlist.h> |
Shuah Khan | 56fa484 | 2013-09-24 15:21:20 -0600 | [diff] [blame] | 26 | #include <trace/events/iommu.h> |
Laura Abbott | 74315cc | 2011-06-08 17:29:11 -0400 | [diff] [blame] | 27 | |
Will Deacon | ca13bb3 | 2013-11-05 15:59:53 +0000 | [diff] [blame] | 28 | #define IOMMU_READ (1 << 0) |
| 29 | #define IOMMU_WRITE (1 << 1) |
| 30 | #define IOMMU_CACHE (1 << 2) /* DMA cache coherency */ |
| 31 | #define IOMMU_EXEC (1 << 3) |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 32 | |
Joerg Roedel | 905d66c | 2011-09-06 16:03:26 +0200 | [diff] [blame] | 33 | struct iommu_ops; |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 34 | struct iommu_group; |
Joerg Roedel | ff21776 | 2011-08-26 16:48:26 +0200 | [diff] [blame] | 35 | struct bus_type; |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 36 | struct device; |
Ohad Ben-Cohen | 4f3f8d9 | 2011-09-13 15:25:23 -0400 | [diff] [blame] | 37 | struct iommu_domain; |
Joerg Roedel | ba1eabfa | 2012-08-03 15:55:41 +0200 | [diff] [blame] | 38 | struct notifier_block; |
Ohad Ben-Cohen | 4f3f8d9 | 2011-09-13 15:25:23 -0400 | [diff] [blame] | 39 | |
| 40 | /* iommu fault flags */ |
| 41 | #define IOMMU_FAULT_READ 0x0 |
| 42 | #define IOMMU_FAULT_WRITE 0x1 |
| 43 | |
| 44 | typedef int (*iommu_fault_handler_t)(struct iommu_domain *, |
Ohad Ben-Cohen | 77ca233 | 2012-05-21 20:20:05 +0300 | [diff] [blame] | 45 | struct device *, unsigned long, int, void *); |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 46 | |
Joerg Roedel | 0ff64f8 | 2012-01-26 19:40:53 +0100 | [diff] [blame] | 47 | struct iommu_domain_geometry { |
| 48 | dma_addr_t aperture_start; /* First address that can be mapped */ |
| 49 | dma_addr_t aperture_end; /* Last address that can be mapped */ |
| 50 | bool force_aperture; /* DMA only allowed in mappable range? */ |
| 51 | }; |
| 52 | |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 53 | struct iommu_domain { |
Thierry Reding | b22f643 | 2014-06-27 09:03:12 +0200 | [diff] [blame] | 54 | const struct iommu_ops *ops; |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 55 | void *priv; |
Ohad Ben-Cohen | 4f3f8d9 | 2011-09-13 15:25:23 -0400 | [diff] [blame] | 56 | iommu_fault_handler_t handler; |
Ohad Ben-Cohen | 77ca233 | 2012-05-21 20:20:05 +0300 | [diff] [blame] | 57 | void *handler_token; |
Joerg Roedel | 0ff64f8 | 2012-01-26 19:40:53 +0100 | [diff] [blame] | 58 | struct iommu_domain_geometry geometry; |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 59 | }; |
| 60 | |
Joerg Roedel | 1aed074 | 2014-09-03 18:34:04 +0200 | [diff] [blame] | 61 | enum iommu_cap { |
| 62 | IOMMU_CAP_CACHE_COHERENCY, /* IOMMU can enforce cache coherent DMA |
| 63 | transactions */ |
| 64 | IOMMU_CAP_INTR_REMAP, /* IOMMU supports interrupt isolation */ |
| 65 | }; |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 66 | |
Varun Sethi | 7cabf49 | 2013-07-15 10:20:56 +0530 | [diff] [blame] | 67 | /* |
| 68 | * Following constraints are specifc to FSL_PAMUV1: |
| 69 | * -aperture must be power of 2, and naturally aligned |
| 70 | * -number of windows must be power of 2, and address space size |
| 71 | * of each window is determined by aperture size / # of windows |
| 72 | * -the actual size of the mapped region of a window must be power |
| 73 | * of 2 starting with 4KB and physical address must be naturally |
| 74 | * aligned. |
| 75 | * DOMAIN_ATTR_FSL_PAMUV1 corresponds to the above mentioned contraints. |
| 76 | * The caller can invoke iommu_domain_get_attr to check if the underlying |
| 77 | * iommu implementation supports these constraints. |
| 78 | */ |
| 79 | |
Joerg Roedel | 0cd76dd | 2012-01-26 19:40:52 +0100 | [diff] [blame] | 80 | enum iommu_attr { |
Joerg Roedel | 0ff64f8 | 2012-01-26 19:40:53 +0100 | [diff] [blame] | 81 | DOMAIN_ATTR_GEOMETRY, |
Joerg Roedel | d2e1216 | 2013-01-29 13:49:04 +0100 | [diff] [blame] | 82 | DOMAIN_ATTR_PAGING, |
Joerg Roedel | 6935671 | 2013-02-04 14:00:01 +0100 | [diff] [blame] | 83 | DOMAIN_ATTR_WINDOWS, |
Varun Sethi | 7cabf49 | 2013-07-15 10:20:56 +0530 | [diff] [blame] | 84 | DOMAIN_ATTR_FSL_PAMU_STASH, |
| 85 | DOMAIN_ATTR_FSL_PAMU_ENABLE, |
| 86 | DOMAIN_ATTR_FSL_PAMUV1, |
Will Deacon | c02607a | 2014-09-29 10:05:06 -0600 | [diff] [blame] | 87 | DOMAIN_ATTR_NESTING, /* two stages of translation */ |
Joerg Roedel | a8b8a88a | 2013-01-29 14:36:31 +0100 | [diff] [blame] | 88 | DOMAIN_ATTR_MAX, |
Joerg Roedel | 0cd76dd | 2012-01-26 19:40:52 +0100 | [diff] [blame] | 89 | }; |
| 90 | |
Joerg Roedel | 39d4ebb | 2011-09-06 16:48:40 +0200 | [diff] [blame] | 91 | #ifdef CONFIG_IOMMU_API |
| 92 | |
Ohad Ben-Cohen | 7d3002c | 2011-11-10 11:32:26 +0200 | [diff] [blame] | 93 | /** |
| 94 | * struct iommu_ops - iommu ops and capabilities |
| 95 | * @domain_init: init iommu domain |
| 96 | * @domain_destroy: destroy iommu domain |
| 97 | * @attach_dev: attach device to an iommu domain |
| 98 | * @detach_dev: detach device from an iommu domain |
| 99 | * @map: map a physically contiguous memory region to an iommu domain |
| 100 | * @unmap: unmap a physically contiguous memory region from an iommu domain |
Olav Haugan | 315786e | 2014-10-25 09:55:16 -0700 | [diff] [blame^] | 101 | * @map_sg: map a scatter-gather list of physically contiguous memory chunks |
| 102 | * to an iommu domain |
Ohad Ben-Cohen | 7d3002c | 2011-11-10 11:32:26 +0200 | [diff] [blame] | 103 | * @iova_to_phys: translate iova to physical address |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 104 | * @add_device: add device to iommu grouping |
| 105 | * @remove_device: remove device from iommu grouping |
Joerg Roedel | 0cd76dd | 2012-01-26 19:40:52 +0100 | [diff] [blame] | 106 | * @domain_get_attr: Query domain attributes |
| 107 | * @domain_set_attr: Change domain attributes |
Ohad Ben-Cohen | 7d3002c | 2011-11-10 11:32:26 +0200 | [diff] [blame] | 108 | * @pgsize_bitmap: bitmap of supported page sizes |
| 109 | */ |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 110 | struct iommu_ops { |
Joerg Roedel | 3c0e0ca | 2014-09-03 18:47:25 +0200 | [diff] [blame] | 111 | bool (*capable)(enum iommu_cap); |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 112 | int (*domain_init)(struct iommu_domain *domain); |
| 113 | void (*domain_destroy)(struct iommu_domain *domain); |
| 114 | int (*attach_dev)(struct iommu_domain *domain, struct device *dev); |
| 115 | void (*detach_dev)(struct iommu_domain *domain, struct device *dev); |
Joerg Roedel | 6765178 | 2010-01-21 16:32:27 +0100 | [diff] [blame] | 116 | int (*map)(struct iommu_domain *domain, unsigned long iova, |
Ohad Ben-Cohen | 5009065 | 2011-11-10 11:32:25 +0200 | [diff] [blame] | 117 | phys_addr_t paddr, size_t size, int prot); |
| 118 | size_t (*unmap)(struct iommu_domain *domain, unsigned long iova, |
| 119 | size_t size); |
Olav Haugan | 315786e | 2014-10-25 09:55:16 -0700 | [diff] [blame^] | 120 | size_t (*map_sg)(struct iommu_domain *domain, unsigned long iova, |
| 121 | struct scatterlist *sg, unsigned int nents, int prot); |
Varun Sethi | bb5547ac | 2013-03-29 01:23:58 +0530 | [diff] [blame] | 122 | phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova); |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 123 | int (*add_device)(struct device *dev); |
| 124 | void (*remove_device)(struct device *dev); |
Alex Williamson | 1460432 | 2011-10-21 15:56:05 -0400 | [diff] [blame] | 125 | int (*device_group)(struct device *dev, unsigned int *groupid); |
Joerg Roedel | 0cd76dd | 2012-01-26 19:40:52 +0100 | [diff] [blame] | 126 | int (*domain_get_attr)(struct iommu_domain *domain, |
| 127 | enum iommu_attr attr, void *data); |
| 128 | int (*domain_set_attr)(struct iommu_domain *domain, |
| 129 | enum iommu_attr attr, void *data); |
Joerg Roedel | d7787d5 | 2013-01-29 14:26:20 +0100 | [diff] [blame] | 130 | |
| 131 | /* Window handling functions */ |
| 132 | int (*domain_window_enable)(struct iommu_domain *domain, u32 wnd_nr, |
Varun Sethi | 80f97f0 | 2013-03-29 01:24:00 +0530 | [diff] [blame] | 133 | phys_addr_t paddr, u64 size, int prot); |
Joerg Roedel | d7787d5 | 2013-01-29 14:26:20 +0100 | [diff] [blame] | 134 | void (*domain_window_disable)(struct iommu_domain *domain, u32 wnd_nr); |
Joerg Roedel | 6935671 | 2013-02-04 14:00:01 +0100 | [diff] [blame] | 135 | /* Set the numer of window per domain */ |
| 136 | int (*domain_set_windows)(struct iommu_domain *domain, u32 w_count); |
| 137 | /* Get the numer of window per domain */ |
| 138 | u32 (*domain_get_windows)(struct iommu_domain *domain); |
Joerg Roedel | d7787d5 | 2013-01-29 14:26:20 +0100 | [diff] [blame] | 139 | |
Ohad Ben-Cohen | 7d3002c | 2011-11-10 11:32:26 +0200 | [diff] [blame] | 140 | unsigned long pgsize_bitmap; |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 141 | }; |
| 142 | |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 143 | #define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */ |
| 144 | #define IOMMU_GROUP_NOTIFY_DEL_DEVICE 2 /* Pre Device removed */ |
| 145 | #define IOMMU_GROUP_NOTIFY_BIND_DRIVER 3 /* Pre Driver bind */ |
| 146 | #define IOMMU_GROUP_NOTIFY_BOUND_DRIVER 4 /* Post Driver bind */ |
| 147 | #define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER 5 /* Pre Driver unbind */ |
| 148 | #define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER 6 /* Post Driver unbind */ |
| 149 | |
Thierry Reding | b22f643 | 2014-06-27 09:03:12 +0200 | [diff] [blame] | 150 | extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops); |
Joerg Roedel | a1b60c1 | 2011-09-06 18:46:34 +0200 | [diff] [blame] | 151 | extern bool iommu_present(struct bus_type *bus); |
Joerg Roedel | 3c0e0ca | 2014-09-03 18:47:25 +0200 | [diff] [blame] | 152 | extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap); |
Joerg Roedel | 905d66c | 2011-09-06 16:03:26 +0200 | [diff] [blame] | 153 | extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus); |
Alexey Kardashevskiy | aa16bea | 2013-03-25 10:23:49 +1100 | [diff] [blame] | 154 | extern struct iommu_group *iommu_group_get_by_id(int id); |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 155 | extern void iommu_domain_free(struct iommu_domain *domain); |
| 156 | extern int iommu_attach_device(struct iommu_domain *domain, |
| 157 | struct device *dev); |
| 158 | extern void iommu_detach_device(struct iommu_domain *domain, |
| 159 | struct device *dev); |
Joerg Roedel | cefc53c | 2010-01-08 13:35:09 +0100 | [diff] [blame] | 160 | extern int iommu_map(struct iommu_domain *domain, unsigned long iova, |
Ohad Ben-Cohen | 7d3002c | 2011-11-10 11:32:26 +0200 | [diff] [blame] | 161 | phys_addr_t paddr, size_t size, int prot); |
| 162 | extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, |
| 163 | size_t size); |
Olav Haugan | 315786e | 2014-10-25 09:55:16 -0700 | [diff] [blame^] | 164 | extern size_t default_iommu_map_sg(struct iommu_domain *domain, unsigned long iova, |
| 165 | struct scatterlist *sg,unsigned int nents, |
| 166 | int prot); |
Varun Sethi | bb5547ac | 2013-03-29 01:23:58 +0530 | [diff] [blame] | 167 | extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova); |
Ohad Ben-Cohen | 4f3f8d9 | 2011-09-13 15:25:23 -0400 | [diff] [blame] | 168 | extern void iommu_set_fault_handler(struct iommu_domain *domain, |
Ohad Ben-Cohen | 77ca233 | 2012-05-21 20:20:05 +0300 | [diff] [blame] | 169 | iommu_fault_handler_t handler, void *token); |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 170 | |
| 171 | extern int iommu_attach_group(struct iommu_domain *domain, |
| 172 | struct iommu_group *group); |
| 173 | extern void iommu_detach_group(struct iommu_domain *domain, |
| 174 | struct iommu_group *group); |
| 175 | extern struct iommu_group *iommu_group_alloc(void); |
| 176 | extern void *iommu_group_get_iommudata(struct iommu_group *group); |
| 177 | extern void iommu_group_set_iommudata(struct iommu_group *group, |
| 178 | void *iommu_data, |
| 179 | void (*release)(void *iommu_data)); |
| 180 | extern int iommu_group_set_name(struct iommu_group *group, const char *name); |
| 181 | extern int iommu_group_add_device(struct iommu_group *group, |
| 182 | struct device *dev); |
| 183 | extern void iommu_group_remove_device(struct device *dev); |
| 184 | extern int iommu_group_for_each_dev(struct iommu_group *group, void *data, |
| 185 | int (*fn)(struct device *, void *)); |
| 186 | extern struct iommu_group *iommu_group_get(struct device *dev); |
| 187 | extern void iommu_group_put(struct iommu_group *group); |
| 188 | extern int iommu_group_register_notifier(struct iommu_group *group, |
| 189 | struct notifier_block *nb); |
| 190 | extern int iommu_group_unregister_notifier(struct iommu_group *group, |
| 191 | struct notifier_block *nb); |
| 192 | extern int iommu_group_id(struct iommu_group *group); |
Alex Williamson | 104a1c1 | 2014-07-03 09:51:18 -0600 | [diff] [blame] | 193 | extern struct iommu_group *iommu_group_get_for_dev(struct device *dev); |
Ohad Ben-Cohen | 4f3f8d9 | 2011-09-13 15:25:23 -0400 | [diff] [blame] | 194 | |
Joerg Roedel | 0cd76dd | 2012-01-26 19:40:52 +0100 | [diff] [blame] | 195 | extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr, |
| 196 | void *data); |
| 197 | extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr, |
| 198 | void *data); |
Alex Williamson | c61959e | 2014-06-12 16:12:24 -0600 | [diff] [blame] | 199 | struct device *iommu_device_create(struct device *parent, void *drvdata, |
| 200 | const struct attribute_group **groups, |
| 201 | const char *fmt, ...); |
| 202 | void iommu_device_destroy(struct device *dev); |
| 203 | int iommu_device_link(struct device *dev, struct device *link); |
| 204 | void iommu_device_unlink(struct device *dev, struct device *link); |
Ohad Ben-Cohen | 4f3f8d9 | 2011-09-13 15:25:23 -0400 | [diff] [blame] | 205 | |
Joerg Roedel | d7787d5 | 2013-01-29 14:26:20 +0100 | [diff] [blame] | 206 | /* Window handling function prototypes */ |
| 207 | extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr, |
Varun Sethi | 80f97f0 | 2013-03-29 01:24:00 +0530 | [diff] [blame] | 208 | phys_addr_t offset, u64 size, |
| 209 | int prot); |
Joerg Roedel | d7787d5 | 2013-01-29 14:26:20 +0100 | [diff] [blame] | 210 | extern void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr); |
Ohad Ben-Cohen | 4f3f8d9 | 2011-09-13 15:25:23 -0400 | [diff] [blame] | 211 | /** |
| 212 | * report_iommu_fault() - report about an IOMMU fault to the IOMMU framework |
| 213 | * @domain: the iommu domain where the fault has happened |
| 214 | * @dev: the device where the fault has happened |
| 215 | * @iova: the faulting address |
| 216 | * @flags: mmu fault flags (e.g. IOMMU_FAULT_READ/IOMMU_FAULT_WRITE/...) |
| 217 | * |
| 218 | * This function should be called by the low-level IOMMU implementations |
| 219 | * whenever IOMMU faults happen, to allow high-level users, that are |
| 220 | * interested in such events, to know about them. |
| 221 | * |
| 222 | * This event may be useful for several possible use cases: |
| 223 | * - mere logging of the event |
| 224 | * - dynamic TLB/PTE loading |
| 225 | * - if restarting of the faulting device is required |
| 226 | * |
| 227 | * Returns 0 on success and an appropriate error code otherwise (if dynamic |
| 228 | * PTE/TLB loading will one day be supported, implementations will be able |
| 229 | * to tell whether it succeeded or not according to this return value). |
Ohad Ben-Cohen | 0ed6d2d | 2011-09-27 07:36:40 -0400 | [diff] [blame] | 230 | * |
| 231 | * Specifically, -ENOSYS is returned if a fault handler isn't installed |
| 232 | * (though fault handlers can also return -ENOSYS, in case they want to |
| 233 | * elicit the default behavior of the IOMMU drivers). |
Ohad Ben-Cohen | 4f3f8d9 | 2011-09-13 15:25:23 -0400 | [diff] [blame] | 234 | */ |
| 235 | static inline int report_iommu_fault(struct iommu_domain *domain, |
| 236 | struct device *dev, unsigned long iova, int flags) |
| 237 | { |
Ohad Ben-Cohen | 0ed6d2d | 2011-09-27 07:36:40 -0400 | [diff] [blame] | 238 | int ret = -ENOSYS; |
Ohad Ben-Cohen | 4f3f8d9 | 2011-09-13 15:25:23 -0400 | [diff] [blame] | 239 | |
| 240 | /* |
| 241 | * if upper layers showed interest and installed a fault handler, |
| 242 | * invoke it. |
| 243 | */ |
| 244 | if (domain->handler) |
Ohad Ben-Cohen | 77ca233 | 2012-05-21 20:20:05 +0300 | [diff] [blame] | 245 | ret = domain->handler(domain, dev, iova, flags, |
| 246 | domain->handler_token); |
Ohad Ben-Cohen | 4f3f8d9 | 2011-09-13 15:25:23 -0400 | [diff] [blame] | 247 | |
Shuah Khan | 56fa484 | 2013-09-24 15:21:20 -0600 | [diff] [blame] | 248 | trace_io_page_fault(dev, iova, flags); |
Ohad Ben-Cohen | 4f3f8d9 | 2011-09-13 15:25:23 -0400 | [diff] [blame] | 249 | return ret; |
| 250 | } |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 251 | |
Olav Haugan | 315786e | 2014-10-25 09:55:16 -0700 | [diff] [blame^] | 252 | static inline size_t iommu_map_sg(struct iommu_domain *domain, |
| 253 | unsigned long iova, struct scatterlist *sg, |
| 254 | unsigned int nents, int prot) |
| 255 | { |
| 256 | return domain->ops->map_sg(domain, iova, sg, nents, prot); |
| 257 | } |
| 258 | |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 259 | #else /* CONFIG_IOMMU_API */ |
| 260 | |
Joerg Roedel | 39d4ebb | 2011-09-06 16:48:40 +0200 | [diff] [blame] | 261 | struct iommu_ops {}; |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 262 | struct iommu_group {}; |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 263 | |
Joerg Roedel | a1b60c1 | 2011-09-06 18:46:34 +0200 | [diff] [blame] | 264 | static inline bool iommu_present(struct bus_type *bus) |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 265 | { |
| 266 | return false; |
| 267 | } |
| 268 | |
Joerg Roedel | 3c0e0ca | 2014-09-03 18:47:25 +0200 | [diff] [blame] | 269 | static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap) |
| 270 | { |
| 271 | return false; |
| 272 | } |
| 273 | |
Joerg Roedel | 905d66c | 2011-09-06 16:03:26 +0200 | [diff] [blame] | 274 | static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus) |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 275 | { |
| 276 | return NULL; |
| 277 | } |
| 278 | |
Alexey Kardashevskiy | b62dfd2 | 2013-11-21 17:41:14 +1100 | [diff] [blame] | 279 | static inline struct iommu_group *iommu_group_get_by_id(int id) |
| 280 | { |
| 281 | return NULL; |
| 282 | } |
| 283 | |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 284 | static inline void iommu_domain_free(struct iommu_domain *domain) |
| 285 | { |
| 286 | } |
| 287 | |
| 288 | static inline int iommu_attach_device(struct iommu_domain *domain, |
| 289 | struct device *dev) |
| 290 | { |
| 291 | return -ENODEV; |
| 292 | } |
| 293 | |
| 294 | static inline void iommu_detach_device(struct iommu_domain *domain, |
| 295 | struct device *dev) |
| 296 | { |
| 297 | } |
| 298 | |
Joerg Roedel | cefc53c | 2010-01-08 13:35:09 +0100 | [diff] [blame] | 299 | static inline int iommu_map(struct iommu_domain *domain, unsigned long iova, |
| 300 | phys_addr_t paddr, int gfp_order, int prot) |
| 301 | { |
| 302 | return -ENODEV; |
| 303 | } |
| 304 | |
| 305 | static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova, |
| 306 | int gfp_order) |
| 307 | { |
| 308 | return -ENODEV; |
| 309 | } |
| 310 | |
Olav Haugan | 315786e | 2014-10-25 09:55:16 -0700 | [diff] [blame^] | 311 | static inline size_t iommu_map_sg(struct iommu_domain *domain, |
| 312 | unsigned long iova, struct scatterlist *sg, |
| 313 | unsigned int nents, int prot) |
| 314 | { |
| 315 | return -ENODEV; |
| 316 | } |
| 317 | |
Joerg Roedel | d7787d5 | 2013-01-29 14:26:20 +0100 | [diff] [blame] | 318 | static inline int iommu_domain_window_enable(struct iommu_domain *domain, |
| 319 | u32 wnd_nr, phys_addr_t paddr, |
Varun Sethi | 80f97f0 | 2013-03-29 01:24:00 +0530 | [diff] [blame] | 320 | u64 size, int prot) |
Joerg Roedel | d7787d5 | 2013-01-29 14:26:20 +0100 | [diff] [blame] | 321 | { |
| 322 | return -ENODEV; |
| 323 | } |
| 324 | |
| 325 | static inline void iommu_domain_window_disable(struct iommu_domain *domain, |
| 326 | u32 wnd_nr) |
| 327 | { |
| 328 | } |
| 329 | |
Varun Sethi | bb5547ac | 2013-03-29 01:23:58 +0530 | [diff] [blame] | 330 | static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova) |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 331 | { |
| 332 | return 0; |
| 333 | } |
| 334 | |
Ohad Ben-Cohen | 4f3f8d9 | 2011-09-13 15:25:23 -0400 | [diff] [blame] | 335 | static inline void iommu_set_fault_handler(struct iommu_domain *domain, |
Ohad Ben-Cohen | 77ca233 | 2012-05-21 20:20:05 +0300 | [diff] [blame] | 336 | iommu_fault_handler_t handler, void *token) |
Ohad Ben-Cohen | 4f3f8d9 | 2011-09-13 15:25:23 -0400 | [diff] [blame] | 337 | { |
| 338 | } |
| 339 | |
Alex Williamson | bef83de | 2012-09-24 21:23:25 -0600 | [diff] [blame] | 340 | static inline int iommu_attach_group(struct iommu_domain *domain, |
| 341 | struct iommu_group *group) |
Alex Williamson | 1460432 | 2011-10-21 15:56:05 -0400 | [diff] [blame] | 342 | { |
| 343 | return -ENODEV; |
| 344 | } |
| 345 | |
Alex Williamson | bef83de | 2012-09-24 21:23:25 -0600 | [diff] [blame] | 346 | static inline void iommu_detach_group(struct iommu_domain *domain, |
| 347 | struct iommu_group *group) |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 348 | { |
| 349 | } |
| 350 | |
Alex Williamson | bef83de | 2012-09-24 21:23:25 -0600 | [diff] [blame] | 351 | static inline struct iommu_group *iommu_group_alloc(void) |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 352 | { |
| 353 | return ERR_PTR(-ENODEV); |
| 354 | } |
| 355 | |
Alex Williamson | bef83de | 2012-09-24 21:23:25 -0600 | [diff] [blame] | 356 | static inline void *iommu_group_get_iommudata(struct iommu_group *group) |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 357 | { |
| 358 | return NULL; |
| 359 | } |
| 360 | |
Alex Williamson | bef83de | 2012-09-24 21:23:25 -0600 | [diff] [blame] | 361 | static inline void iommu_group_set_iommudata(struct iommu_group *group, |
| 362 | void *iommu_data, |
| 363 | void (*release)(void *iommu_data)) |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 364 | { |
| 365 | } |
| 366 | |
Alex Williamson | bef83de | 2012-09-24 21:23:25 -0600 | [diff] [blame] | 367 | static inline int iommu_group_set_name(struct iommu_group *group, |
| 368 | const char *name) |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 369 | { |
| 370 | return -ENODEV; |
| 371 | } |
| 372 | |
Alex Williamson | bef83de | 2012-09-24 21:23:25 -0600 | [diff] [blame] | 373 | static inline int iommu_group_add_device(struct iommu_group *group, |
| 374 | struct device *dev) |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 375 | { |
| 376 | return -ENODEV; |
| 377 | } |
| 378 | |
Alex Williamson | bef83de | 2012-09-24 21:23:25 -0600 | [diff] [blame] | 379 | static inline void iommu_group_remove_device(struct device *dev) |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 380 | { |
| 381 | } |
| 382 | |
Alex Williamson | bef83de | 2012-09-24 21:23:25 -0600 | [diff] [blame] | 383 | static inline int iommu_group_for_each_dev(struct iommu_group *group, |
| 384 | void *data, |
| 385 | int (*fn)(struct device *, void *)) |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 386 | { |
| 387 | return -ENODEV; |
| 388 | } |
| 389 | |
Alex Williamson | bef83de | 2012-09-24 21:23:25 -0600 | [diff] [blame] | 390 | static inline struct iommu_group *iommu_group_get(struct device *dev) |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 391 | { |
| 392 | return NULL; |
| 393 | } |
| 394 | |
Alex Williamson | bef83de | 2012-09-24 21:23:25 -0600 | [diff] [blame] | 395 | static inline void iommu_group_put(struct iommu_group *group) |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 396 | { |
| 397 | } |
| 398 | |
Alex Williamson | bef83de | 2012-09-24 21:23:25 -0600 | [diff] [blame] | 399 | static inline int iommu_group_register_notifier(struct iommu_group *group, |
| 400 | struct notifier_block *nb) |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 401 | { |
| 402 | return -ENODEV; |
| 403 | } |
| 404 | |
Alex Williamson | bef83de | 2012-09-24 21:23:25 -0600 | [diff] [blame] | 405 | static inline int iommu_group_unregister_notifier(struct iommu_group *group, |
| 406 | struct notifier_block *nb) |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 407 | { |
| 408 | return 0; |
| 409 | } |
| 410 | |
Alex Williamson | bef83de | 2012-09-24 21:23:25 -0600 | [diff] [blame] | 411 | static inline int iommu_group_id(struct iommu_group *group) |
Alex Williamson | d72e31c | 2012-05-30 14:18:53 -0600 | [diff] [blame] | 412 | { |
| 413 | return -ENODEV; |
| 414 | } |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 415 | |
Joerg Roedel | 0cd76dd | 2012-01-26 19:40:52 +0100 | [diff] [blame] | 416 | static inline int iommu_domain_get_attr(struct iommu_domain *domain, |
| 417 | enum iommu_attr attr, void *data) |
| 418 | { |
| 419 | return -EINVAL; |
| 420 | } |
| 421 | |
| 422 | static inline int iommu_domain_set_attr(struct iommu_domain *domain, |
| 423 | enum iommu_attr attr, void *data) |
| 424 | { |
| 425 | return -EINVAL; |
| 426 | } |
| 427 | |
Alex Williamson | e09f8ea5 | 2014-07-07 14:31:36 -0600 | [diff] [blame] | 428 | static inline struct device *iommu_device_create(struct device *parent, |
| 429 | void *drvdata, |
| 430 | const struct attribute_group **groups, |
| 431 | const char *fmt, ...) |
Alex Williamson | c61959e | 2014-06-12 16:12:24 -0600 | [diff] [blame] | 432 | { |
| 433 | return ERR_PTR(-ENODEV); |
| 434 | } |
| 435 | |
Alex Williamson | e09f8ea5 | 2014-07-07 14:31:36 -0600 | [diff] [blame] | 436 | static inline void iommu_device_destroy(struct device *dev) |
Alex Williamson | c61959e | 2014-06-12 16:12:24 -0600 | [diff] [blame] | 437 | { |
| 438 | } |
| 439 | |
Alex Williamson | e09f8ea5 | 2014-07-07 14:31:36 -0600 | [diff] [blame] | 440 | static inline int iommu_device_link(struct device *dev, struct device *link) |
Alex Williamson | c61959e | 2014-06-12 16:12:24 -0600 | [diff] [blame] | 441 | { |
| 442 | return -EINVAL; |
| 443 | } |
| 444 | |
Alex Williamson | e09f8ea5 | 2014-07-07 14:31:36 -0600 | [diff] [blame] | 445 | static inline void iommu_device_unlink(struct device *dev, struct device *link) |
Alex Williamson | c61959e | 2014-06-12 16:12:24 -0600 | [diff] [blame] | 446 | { |
| 447 | } |
| 448 | |
Joerg Roedel | 4a77a6c | 2008-11-26 17:02:33 +0100 | [diff] [blame] | 449 | #endif /* CONFIG_IOMMU_API */ |
| 450 | |
| 451 | #endif /* __LINUX_IOMMU_H */ |