Commit | Line | Data |
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4a77a6cf 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 | #ifndef __LINUX_IOMMU_H | |
20 | #define __LINUX_IOMMU_H | |
21 | ||
74315ccc | 22 | #include <linux/errno.h> |
76582d0a | 23 | #include <linux/types.h> |
74315ccc | 24 | |
4a77a6cf JR |
25 | #define IOMMU_READ (1) |
26 | #define IOMMU_WRITE (2) | |
9cf06697 | 27 | #define IOMMU_CACHE (4) /* DMA cache coherency */ |
4a77a6cf | 28 | |
905d66c1 | 29 | struct iommu_ops; |
d72e31c9 | 30 | struct iommu_group; |
ff21776d | 31 | struct bus_type; |
4a77a6cf | 32 | struct device; |
4f3f8d9d | 33 | struct iommu_domain; |
ba1eabfa | 34 | struct notifier_block; |
4f3f8d9d OBC |
35 | |
36 | /* iommu fault flags */ | |
37 | #define IOMMU_FAULT_READ 0x0 | |
38 | #define IOMMU_FAULT_WRITE 0x1 | |
39 | ||
40 | typedef int (*iommu_fault_handler_t)(struct iommu_domain *, | |
77ca2332 | 41 | struct device *, unsigned long, int, void *); |
4a77a6cf | 42 | |
0ff64f80 JR |
43 | struct iommu_domain_geometry { |
44 | dma_addr_t aperture_start; /* First address that can be mapped */ | |
45 | dma_addr_t aperture_end; /* Last address that can be mapped */ | |
46 | bool force_aperture; /* DMA only allowed in mappable range? */ | |
47 | }; | |
48 | ||
4a77a6cf | 49 | struct iommu_domain { |
905d66c1 | 50 | struct iommu_ops *ops; |
4a77a6cf | 51 | void *priv; |
4f3f8d9d | 52 | iommu_fault_handler_t handler; |
77ca2332 | 53 | void *handler_token; |
0ff64f80 | 54 | struct iommu_domain_geometry geometry; |
4a77a6cf JR |
55 | }; |
56 | ||
dbb9fd86 | 57 | #define IOMMU_CAP_CACHE_COHERENCY 0x1 |
323f99cb | 58 | #define IOMMU_CAP_INTR_REMAP 0x2 /* isolates device intrs */ |
dbb9fd86 | 59 | |
0cd76dd1 | 60 | enum iommu_attr { |
0ff64f80 | 61 | DOMAIN_ATTR_GEOMETRY, |
d2e12160 | 62 | DOMAIN_ATTR_PAGING, |
69356712 | 63 | DOMAIN_ATTR_WINDOWS, |
a8b8a88a | 64 | DOMAIN_ATTR_MAX, |
0cd76dd1 JR |
65 | }; |
66 | ||
39d4ebb9 JR |
67 | #ifdef CONFIG_IOMMU_API |
68 | ||
7d3002cc OBC |
69 | /** |
70 | * struct iommu_ops - iommu ops and capabilities | |
71 | * @domain_init: init iommu domain | |
72 | * @domain_destroy: destroy iommu domain | |
73 | * @attach_dev: attach device to an iommu domain | |
74 | * @detach_dev: detach device from an iommu domain | |
75 | * @map: map a physically contiguous memory region to an iommu domain | |
76 | * @unmap: unmap a physically contiguous memory region from an iommu domain | |
77 | * @iova_to_phys: translate iova to physical address | |
78 | * @domain_has_cap: domain capabilities query | |
d72e31c9 AW |
79 | * @add_device: add device to iommu grouping |
80 | * @remove_device: remove device from iommu grouping | |
0cd76dd1 JR |
81 | * @domain_get_attr: Query domain attributes |
82 | * @domain_set_attr: Change domain attributes | |
7d3002cc OBC |
83 | * @pgsize_bitmap: bitmap of supported page sizes |
84 | */ | |
4a77a6cf JR |
85 | struct iommu_ops { |
86 | int (*domain_init)(struct iommu_domain *domain); | |
87 | void (*domain_destroy)(struct iommu_domain *domain); | |
88 | int (*attach_dev)(struct iommu_domain *domain, struct device *dev); | |
89 | void (*detach_dev)(struct iommu_domain *domain, struct device *dev); | |
67651786 | 90 | int (*map)(struct iommu_domain *domain, unsigned long iova, |
5009065d OBC |
91 | phys_addr_t paddr, size_t size, int prot); |
92 | size_t (*unmap)(struct iommu_domain *domain, unsigned long iova, | |
93 | size_t size); | |
bb5547ac | 94 | phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova); |
dbb9fd86 SY |
95 | int (*domain_has_cap)(struct iommu_domain *domain, |
96 | unsigned long cap); | |
d72e31c9 AW |
97 | int (*add_device)(struct device *dev); |
98 | void (*remove_device)(struct device *dev); | |
1460432c | 99 | int (*device_group)(struct device *dev, unsigned int *groupid); |
0cd76dd1 JR |
100 | int (*domain_get_attr)(struct iommu_domain *domain, |
101 | enum iommu_attr attr, void *data); | |
102 | int (*domain_set_attr)(struct iommu_domain *domain, | |
103 | enum iommu_attr attr, void *data); | |
d7787d57 JR |
104 | |
105 | /* Window handling functions */ | |
106 | int (*domain_window_enable)(struct iommu_domain *domain, u32 wnd_nr, | |
107 | phys_addr_t paddr, u64 size); | |
108 | void (*domain_window_disable)(struct iommu_domain *domain, u32 wnd_nr); | |
69356712 JR |
109 | /* Set the numer of window per domain */ |
110 | int (*domain_set_windows)(struct iommu_domain *domain, u32 w_count); | |
111 | /* Get the numer of window per domain */ | |
112 | u32 (*domain_get_windows)(struct iommu_domain *domain); | |
d7787d57 | 113 | |
7d3002cc | 114 | unsigned long pgsize_bitmap; |
4a77a6cf JR |
115 | }; |
116 | ||
d72e31c9 AW |
117 | #define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */ |
118 | #define IOMMU_GROUP_NOTIFY_DEL_DEVICE 2 /* Pre Device removed */ | |
119 | #define IOMMU_GROUP_NOTIFY_BIND_DRIVER 3 /* Pre Driver bind */ | |
120 | #define IOMMU_GROUP_NOTIFY_BOUND_DRIVER 4 /* Post Driver bind */ | |
121 | #define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER 5 /* Pre Driver unbind */ | |
122 | #define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER 6 /* Post Driver unbind */ | |
123 | ||
ff21776d | 124 | extern int bus_set_iommu(struct bus_type *bus, struct iommu_ops *ops); |
a1b60c1c | 125 | extern bool iommu_present(struct bus_type *bus); |
905d66c1 | 126 | extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus); |
4a77a6cf JR |
127 | extern void iommu_domain_free(struct iommu_domain *domain); |
128 | extern int iommu_attach_device(struct iommu_domain *domain, | |
129 | struct device *dev); | |
130 | extern void iommu_detach_device(struct iommu_domain *domain, | |
131 | struct device *dev); | |
cefc53c7 | 132 | extern int iommu_map(struct iommu_domain *domain, unsigned long iova, |
7d3002cc OBC |
133 | phys_addr_t paddr, size_t size, int prot); |
134 | extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, | |
135 | size_t size); | |
bb5547ac | 136 | extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova); |
dbb9fd86 SY |
137 | extern int iommu_domain_has_cap(struct iommu_domain *domain, |
138 | unsigned long cap); | |
4f3f8d9d | 139 | extern void iommu_set_fault_handler(struct iommu_domain *domain, |
77ca2332 | 140 | iommu_fault_handler_t handler, void *token); |
d72e31c9 AW |
141 | |
142 | extern int iommu_attach_group(struct iommu_domain *domain, | |
143 | struct iommu_group *group); | |
144 | extern void iommu_detach_group(struct iommu_domain *domain, | |
145 | struct iommu_group *group); | |
146 | extern struct iommu_group *iommu_group_alloc(void); | |
147 | extern void *iommu_group_get_iommudata(struct iommu_group *group); | |
148 | extern void iommu_group_set_iommudata(struct iommu_group *group, | |
149 | void *iommu_data, | |
150 | void (*release)(void *iommu_data)); | |
151 | extern int iommu_group_set_name(struct iommu_group *group, const char *name); | |
152 | extern int iommu_group_add_device(struct iommu_group *group, | |
153 | struct device *dev); | |
154 | extern void iommu_group_remove_device(struct device *dev); | |
155 | extern int iommu_group_for_each_dev(struct iommu_group *group, void *data, | |
156 | int (*fn)(struct device *, void *)); | |
157 | extern struct iommu_group *iommu_group_get(struct device *dev); | |
158 | extern void iommu_group_put(struct iommu_group *group); | |
159 | extern int iommu_group_register_notifier(struct iommu_group *group, | |
160 | struct notifier_block *nb); | |
161 | extern int iommu_group_unregister_notifier(struct iommu_group *group, | |
162 | struct notifier_block *nb); | |
163 | extern int iommu_group_id(struct iommu_group *group); | |
4f3f8d9d | 164 | |
0cd76dd1 JR |
165 | extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr, |
166 | void *data); | |
167 | extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr, | |
168 | void *data); | |
4f3f8d9d | 169 | |
d7787d57 JR |
170 | /* Window handling function prototypes */ |
171 | extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr, | |
172 | phys_addr_t offset, u64 size); | |
173 | extern void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr); | |
4f3f8d9d OBC |
174 | /** |
175 | * report_iommu_fault() - report about an IOMMU fault to the IOMMU framework | |
176 | * @domain: the iommu domain where the fault has happened | |
177 | * @dev: the device where the fault has happened | |
178 | * @iova: the faulting address | |
179 | * @flags: mmu fault flags (e.g. IOMMU_FAULT_READ/IOMMU_FAULT_WRITE/...) | |
180 | * | |
181 | * This function should be called by the low-level IOMMU implementations | |
182 | * whenever IOMMU faults happen, to allow high-level users, that are | |
183 | * interested in such events, to know about them. | |
184 | * | |
185 | * This event may be useful for several possible use cases: | |
186 | * - mere logging of the event | |
187 | * - dynamic TLB/PTE loading | |
188 | * - if restarting of the faulting device is required | |
189 | * | |
190 | * Returns 0 on success and an appropriate error code otherwise (if dynamic | |
191 | * PTE/TLB loading will one day be supported, implementations will be able | |
192 | * to tell whether it succeeded or not according to this return value). | |
0ed6d2d2 OBC |
193 | * |
194 | * Specifically, -ENOSYS is returned if a fault handler isn't installed | |
195 | * (though fault handlers can also return -ENOSYS, in case they want to | |
196 | * elicit the default behavior of the IOMMU drivers). | |
4f3f8d9d OBC |
197 | */ |
198 | static inline int report_iommu_fault(struct iommu_domain *domain, | |
199 | struct device *dev, unsigned long iova, int flags) | |
200 | { | |
0ed6d2d2 | 201 | int ret = -ENOSYS; |
4a77a6cf | 202 | |
4f3f8d9d OBC |
203 | /* |
204 | * if upper layers showed interest and installed a fault handler, | |
205 | * invoke it. | |
206 | */ | |
207 | if (domain->handler) | |
77ca2332 OBC |
208 | ret = domain->handler(domain, dev, iova, flags, |
209 | domain->handler_token); | |
4a77a6cf | 210 | |
4f3f8d9d | 211 | return ret; |
4a77a6cf JR |
212 | } |
213 | ||
4a77a6cf JR |
214 | #else /* CONFIG_IOMMU_API */ |
215 | ||
39d4ebb9 | 216 | struct iommu_ops {}; |
d72e31c9 | 217 | struct iommu_group {}; |
4a77a6cf | 218 | |
a1b60c1c | 219 | static inline bool iommu_present(struct bus_type *bus) |
4a77a6cf JR |
220 | { |
221 | return false; | |
222 | } | |
223 | ||
905d66c1 | 224 | static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus) |
4a77a6cf JR |
225 | { |
226 | return NULL; | |
227 | } | |
228 | ||
229 | static inline void iommu_domain_free(struct iommu_domain *domain) | |
230 | { | |
231 | } | |
232 | ||
233 | static inline int iommu_attach_device(struct iommu_domain *domain, | |
234 | struct device *dev) | |
235 | { | |
236 | return -ENODEV; | |
237 | } | |
238 | ||
239 | static inline void iommu_detach_device(struct iommu_domain *domain, | |
240 | struct device *dev) | |
241 | { | |
242 | } | |
243 | ||
cefc53c7 JR |
244 | static inline int iommu_map(struct iommu_domain *domain, unsigned long iova, |
245 | phys_addr_t paddr, int gfp_order, int prot) | |
246 | { | |
247 | return -ENODEV; | |
248 | } | |
249 | ||
250 | static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova, | |
251 | int gfp_order) | |
252 | { | |
253 | return -ENODEV; | |
254 | } | |
255 | ||
d7787d57 JR |
256 | static inline int iommu_domain_window_enable(struct iommu_domain *domain, |
257 | u32 wnd_nr, phys_addr_t paddr, | |
258 | u64 size) | |
259 | { | |
260 | return -ENODEV; | |
261 | } | |
262 | ||
263 | static inline void iommu_domain_window_disable(struct iommu_domain *domain, | |
264 | u32 wnd_nr) | |
265 | { | |
266 | } | |
267 | ||
bb5547ac | 268 | static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova) |
4a77a6cf JR |
269 | { |
270 | return 0; | |
271 | } | |
272 | ||
dbb9fd86 SY |
273 | static inline int domain_has_cap(struct iommu_domain *domain, |
274 | unsigned long cap) | |
275 | { | |
276 | return 0; | |
277 | } | |
278 | ||
4f3f8d9d | 279 | static inline void iommu_set_fault_handler(struct iommu_domain *domain, |
77ca2332 | 280 | iommu_fault_handler_t handler, void *token) |
4f3f8d9d OBC |
281 | { |
282 | } | |
283 | ||
bef83de5 AW |
284 | static inline int iommu_attach_group(struct iommu_domain *domain, |
285 | struct iommu_group *group) | |
d72e31c9 AW |
286 | { |
287 | return -ENODEV; | |
288 | } | |
289 | ||
bef83de5 AW |
290 | static inline void iommu_detach_group(struct iommu_domain *domain, |
291 | struct iommu_group *group) | |
d72e31c9 AW |
292 | { |
293 | } | |
294 | ||
bef83de5 | 295 | static inline struct iommu_group *iommu_group_alloc(void) |
d72e31c9 AW |
296 | { |
297 | return ERR_PTR(-ENODEV); | |
298 | } | |
299 | ||
bef83de5 | 300 | static inline void *iommu_group_get_iommudata(struct iommu_group *group) |
d72e31c9 AW |
301 | { |
302 | return NULL; | |
303 | } | |
304 | ||
bef83de5 AW |
305 | static inline void iommu_group_set_iommudata(struct iommu_group *group, |
306 | void *iommu_data, | |
307 | void (*release)(void *iommu_data)) | |
d72e31c9 AW |
308 | { |
309 | } | |
310 | ||
bef83de5 AW |
311 | static inline int iommu_group_set_name(struct iommu_group *group, |
312 | const char *name) | |
d72e31c9 AW |
313 | { |
314 | return -ENODEV; | |
315 | } | |
316 | ||
bef83de5 AW |
317 | static inline int iommu_group_add_device(struct iommu_group *group, |
318 | struct device *dev) | |
d72e31c9 AW |
319 | { |
320 | return -ENODEV; | |
321 | } | |
322 | ||
bef83de5 | 323 | static inline void iommu_group_remove_device(struct device *dev) |
d72e31c9 AW |
324 | { |
325 | } | |
326 | ||
bef83de5 AW |
327 | static inline int iommu_group_for_each_dev(struct iommu_group *group, |
328 | void *data, | |
329 | int (*fn)(struct device *, void *)) | |
d72e31c9 AW |
330 | { |
331 | return -ENODEV; | |
332 | } | |
333 | ||
bef83de5 | 334 | static inline struct iommu_group *iommu_group_get(struct device *dev) |
d72e31c9 AW |
335 | { |
336 | return NULL; | |
337 | } | |
338 | ||
bef83de5 | 339 | static inline void iommu_group_put(struct iommu_group *group) |
d72e31c9 AW |
340 | { |
341 | } | |
342 | ||
bef83de5 AW |
343 | static inline int iommu_group_register_notifier(struct iommu_group *group, |
344 | struct notifier_block *nb) | |
1460432c AW |
345 | { |
346 | return -ENODEV; | |
347 | } | |
348 | ||
bef83de5 AW |
349 | static inline int iommu_group_unregister_notifier(struct iommu_group *group, |
350 | struct notifier_block *nb) | |
d72e31c9 AW |
351 | { |
352 | return 0; | |
353 | } | |
354 | ||
bef83de5 | 355 | static inline int iommu_group_id(struct iommu_group *group) |
d72e31c9 AW |
356 | { |
357 | return -ENODEV; | |
358 | } | |
1460432c | 359 | |
0cd76dd1 JR |
360 | static inline int iommu_domain_get_attr(struct iommu_domain *domain, |
361 | enum iommu_attr attr, void *data) | |
362 | { | |
363 | return -EINVAL; | |
364 | } | |
365 | ||
366 | static inline int iommu_domain_set_attr(struct iommu_domain *domain, | |
367 | enum iommu_attr attr, void *data) | |
368 | { | |
369 | return -EINVAL; | |
370 | } | |
371 | ||
4a77a6cf JR |
372 | #endif /* CONFIG_IOMMU_API */ |
373 | ||
374 | #endif /* __LINUX_IOMMU_H */ |