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Commit | Line | Data |
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176fb0d1 LP |
1 | /* |
2 | * Media device | |
3 | * | |
4 | * Copyright (C) 2010 Nokia Corporation | |
5 | * | |
6 | * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com> | |
7 | * Sakari Ailus <sakari.ailus@iki.fi> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
176fb0d1 LP |
17 | */ |
18 | ||
b2cd2744 MCC |
19 | /* We need to access legacy defines from linux/media.h */ |
20 | #define __NEED_MEDIA_LEGACY_API | |
21 | ||
b0a1f2a8 SA |
22 | #include <linux/compat.h> |
23 | #include <linux/export.h> | |
665faa97 | 24 | #include <linux/idr.h> |
176fb0d1 | 25 | #include <linux/ioctl.h> |
140d8816 | 26 | #include <linux/media.h> |
57208e5e | 27 | #include <linux/slab.h> |
497e80cd | 28 | #include <linux/types.h> |
41b44e35 MCC |
29 | #include <linux/pci.h> |
30 | #include <linux/usb.h> | |
176fb0d1 LP |
31 | |
32 | #include <media/media-device.h> | |
33 | #include <media/media-devnode.h> | |
53e269c1 | 34 | #include <media/media-entity.h> |
176fb0d1 | 35 | |
e576d60b SK |
36 | #ifdef CONFIG_MEDIA_CONTROLLER |
37 | ||
140d8816 LP |
38 | /* ----------------------------------------------------------------------------- |
39 | * Userspace API | |
40 | */ | |
41 | ||
0629e991 SA |
42 | static inline void __user *media_get_uptr(__u64 arg) |
43 | { | |
44 | return (void __user *)(uintptr_t)arg; | |
45 | } | |
46 | ||
140d8816 LP |
47 | static int media_device_open(struct file *filp) |
48 | { | |
49 | return 0; | |
50 | } | |
51 | ||
52 | static int media_device_close(struct file *filp) | |
53 | { | |
54 | return 0; | |
55 | } | |
56 | ||
57 | static int media_device_get_info(struct media_device *dev, | |
bcd5081b | 58 | struct media_device_info *info) |
140d8816 | 59 | { |
bcd5081b | 60 | memset(info, 0, sizeof(*info)); |
140d8816 | 61 | |
bb07bd6b | 62 | if (dev->driver_name[0]) |
bcd5081b | 63 | strlcpy(info->driver, dev->driver_name, sizeof(info->driver)); |
bb07bd6b | 64 | else |
bcd5081b SA |
65 | strlcpy(info->driver, dev->dev->driver->name, |
66 | sizeof(info->driver)); | |
bb07bd6b | 67 | |
bcd5081b SA |
68 | strlcpy(info->model, dev->model, sizeof(info->model)); |
69 | strlcpy(info->serial, dev->serial, sizeof(info->serial)); | |
70 | strlcpy(info->bus_info, dev->bus_info, sizeof(info->bus_info)); | |
140d8816 | 71 | |
bcd5081b SA |
72 | info->media_version = MEDIA_API_VERSION; |
73 | info->hw_revision = dev->hw_revision; | |
74 | info->driver_version = dev->driver_version; | |
140d8816 | 75 | |
b17d3945 | 76 | return 0; |
140d8816 LP |
77 | } |
78 | ||
1651333b LP |
79 | static struct media_entity *find_entity(struct media_device *mdev, u32 id) |
80 | { | |
81 | struct media_entity *entity; | |
82 | int next = id & MEDIA_ENT_ID_FLAG_NEXT; | |
83 | ||
84 | id &= ~MEDIA_ENT_ID_FLAG_NEXT; | |
85 | ||
1651333b | 86 | media_device_for_each_entity(entity, mdev) { |
fa762394 MCC |
87 | if (((media_entity_id(entity) == id) && !next) || |
88 | ((media_entity_id(entity) > id) && next)) { | |
1651333b LP |
89 | return entity; |
90 | } | |
91 | } | |
92 | ||
1651333b LP |
93 | return NULL; |
94 | } | |
95 | ||
96 | static long media_device_enum_entities(struct media_device *mdev, | |
bcd5081b | 97 | struct media_entity_desc *entd) |
1651333b LP |
98 | { |
99 | struct media_entity *ent; | |
1651333b | 100 | |
bcd5081b | 101 | ent = find_entity(mdev, entd->id); |
1651333b LP |
102 | if (ent == NULL) |
103 | return -EINVAL; | |
104 | ||
bcd5081b SA |
105 | memset(entd, 0, sizeof(*entd)); |
106 | ||
107 | entd->id = media_entity_id(ent); | |
de8eae36 | 108 | if (ent->name) |
bcd5081b SA |
109 | strlcpy(entd->name, ent->name, sizeof(entd->name)); |
110 | entd->type = ent->function; | |
111 | entd->revision = 0; /* Unused */ | |
112 | entd->flags = ent->flags; | |
113 | entd->group_id = 0; /* Unused */ | |
114 | entd->pads = ent->num_pads; | |
115 | entd->links = ent->num_links - ent->num_backlinks; | |
b2cd2744 MCC |
116 | |
117 | /* | |
118 | * Workaround for a bug at media-ctl <= v1.10 that makes it to | |
119 | * do the wrong thing if the entity function doesn't belong to | |
120 | * either MEDIA_ENT_F_OLD_BASE or MEDIA_ENT_F_OLD_SUBDEV_BASE | |
121 | * Ranges. | |
122 | * | |
123 | * Non-subdevices are expected to be at the MEDIA_ENT_F_OLD_BASE, | |
124 | * or, otherwise, will be silently ignored by media-ctl when | |
125 | * printing the graphviz diagram. So, map them into the devnode | |
126 | * old range. | |
127 | */ | |
128 | if (ent->function < MEDIA_ENT_F_OLD_BASE || | |
98d85f3c | 129 | ent->function > MEDIA_ENT_F_TUNER) { |
b2cd2744 | 130 | if (is_media_entity_v4l2_subdev(ent)) |
bcd5081b | 131 | entd->type = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN; |
b2cd2744 | 132 | else if (ent->function != MEDIA_ENT_F_IO_V4L) |
bcd5081b | 133 | entd->type = MEDIA_ENT_T_DEVNODE_UNKNOWN; |
b2cd2744 MCC |
134 | } |
135 | ||
bcd5081b SA |
136 | memcpy(&entd->raw, &ent->info, sizeof(ent->info)); |
137 | ||
1651333b LP |
138 | return 0; |
139 | } | |
140 | ||
141 | static void media_device_kpad_to_upad(const struct media_pad *kpad, | |
142 | struct media_pad_desc *upad) | |
143 | { | |
fa762394 | 144 | upad->entity = media_entity_id(kpad->entity); |
1651333b LP |
145 | upad->index = kpad->index; |
146 | upad->flags = kpad->flags; | |
147 | } | |
148 | ||
bcd5081b SA |
149 | static long media_device_enum_links(struct media_device *mdev, |
150 | struct media_links_enum *links) | |
1651333b LP |
151 | { |
152 | struct media_entity *entity; | |
1651333b | 153 | |
b0a1f2a8 | 154 | entity = find_entity(mdev, links->entity); |
1651333b LP |
155 | if (entity == NULL) |
156 | return -EINVAL; | |
157 | ||
b0a1f2a8 | 158 | if (links->pads) { |
1651333b LP |
159 | unsigned int p; |
160 | ||
161 | for (p = 0; p < entity->num_pads; p++) { | |
162 | struct media_pad_desc pad; | |
c88e739b DC |
163 | |
164 | memset(&pad, 0, sizeof(pad)); | |
1651333b | 165 | media_device_kpad_to_upad(&entity->pads[p], &pad); |
b0a1f2a8 | 166 | if (copy_to_user(&links->pads[p], &pad, sizeof(pad))) |
1651333b LP |
167 | return -EFAULT; |
168 | } | |
169 | } | |
170 | ||
b0a1f2a8 | 171 | if (links->links) { |
b83e2508 MCC |
172 | struct media_link *link; |
173 | struct media_link_desc __user *ulink_desc = links->links; | |
1651333b | 174 | |
b83e2508 MCC |
175 | list_for_each_entry(link, &entity->links, list) { |
176 | struct media_link_desc klink_desc; | |
1651333b LP |
177 | |
178 | /* Ignore backlinks. */ | |
b83e2508 | 179 | if (link->source->entity != entity) |
1651333b | 180 | continue; |
b83e2508 MCC |
181 | memset(&klink_desc, 0, sizeof(klink_desc)); |
182 | media_device_kpad_to_upad(link->source, | |
183 | &klink_desc.source); | |
184 | media_device_kpad_to_upad(link->sink, | |
185 | &klink_desc.sink); | |
186 | klink_desc.flags = link->flags; | |
187 | if (copy_to_user(ulink_desc, &klink_desc, | |
188 | sizeof(*ulink_desc))) | |
1651333b | 189 | return -EFAULT; |
b83e2508 | 190 | ulink_desc++; |
1651333b LP |
191 | } |
192 | } | |
b0a1f2a8 SA |
193 | |
194 | return 0; | |
195 | } | |
196 | ||
97548ed4 | 197 | static long media_device_setup_link(struct media_device *mdev, |
bcd5081b | 198 | struct media_link_desc *linkd) |
97548ed4 LP |
199 | { |
200 | struct media_link *link = NULL; | |
97548ed4 LP |
201 | struct media_entity *source; |
202 | struct media_entity *sink; | |
97548ed4 LP |
203 | |
204 | /* Find the source and sink entities and link. | |
205 | */ | |
bcd5081b SA |
206 | source = find_entity(mdev, linkd->source.entity); |
207 | sink = find_entity(mdev, linkd->sink.entity); | |
97548ed4 LP |
208 | |
209 | if (source == NULL || sink == NULL) | |
210 | return -EINVAL; | |
211 | ||
bcd5081b SA |
212 | if (linkd->source.index >= source->num_pads || |
213 | linkd->sink.index >= sink->num_pads) | |
97548ed4 LP |
214 | return -EINVAL; |
215 | ||
bcd5081b SA |
216 | link = media_entity_find_link(&source->pads[linkd->source.index], |
217 | &sink->pads[linkd->sink.index]); | |
97548ed4 LP |
218 | if (link == NULL) |
219 | return -EINVAL; | |
220 | ||
221 | /* Setup the link on both entities. */ | |
bcd5081b | 222 | return __media_entity_setup_link(link, linkd->flags); |
97548ed4 LP |
223 | } |
224 | ||
bcd5081b | 225 | static long media_device_get_topology(struct media_device *mdev, |
8309f47c MCC |
226 | struct media_v2_topology *topo) |
227 | { | |
228 | struct media_entity *entity; | |
229 | struct media_interface *intf; | |
230 | struct media_pad *pad; | |
231 | struct media_link *link; | |
d37410c2 SA |
232 | struct media_v2_entity kentity, __user *uentity; |
233 | struct media_v2_interface kintf, __user *uintf; | |
234 | struct media_v2_pad kpad, __user *upad; | |
235 | struct media_v2_link klink, __user *ulink; | |
9033b1a4 MCC |
236 | unsigned int i; |
237 | int ret = 0; | |
8309f47c MCC |
238 | |
239 | topo->topology_version = mdev->topology_version; | |
240 | ||
241 | /* Get entities and number of entities */ | |
242 | i = 0; | |
b3b7a9f1 | 243 | uentity = media_get_uptr(topo->ptr_entities); |
8309f47c MCC |
244 | media_device_for_each_entity(entity, mdev) { |
245 | i++; | |
b3b7a9f1 | 246 | if (ret || !uentity) |
8309f47c MCC |
247 | continue; |
248 | ||
249 | if (i > topo->num_entities) { | |
250 | ret = -ENOSPC; | |
251 | continue; | |
252 | } | |
253 | ||
254 | /* Copy fields to userspace struct if not error */ | |
b3b7a9f1 MCC |
255 | memset(&kentity, 0, sizeof(kentity)); |
256 | kentity.id = entity->graph_obj.id; | |
257 | kentity.function = entity->function; | |
258 | strncpy(kentity.name, entity->name, | |
259 | sizeof(kentity.name)); | |
8309f47c | 260 | |
b3b7a9f1 | 261 | if (copy_to_user(uentity, &kentity, sizeof(kentity))) |
8309f47c | 262 | ret = -EFAULT; |
b3b7a9f1 | 263 | uentity++; |
8309f47c MCC |
264 | } |
265 | topo->num_entities = i; | |
266 | ||
267 | /* Get interfaces and number of interfaces */ | |
268 | i = 0; | |
b3b7a9f1 | 269 | uintf = media_get_uptr(topo->ptr_interfaces); |
8309f47c MCC |
270 | media_device_for_each_intf(intf, mdev) { |
271 | i++; | |
b3b7a9f1 | 272 | if (ret || !uintf) |
8309f47c MCC |
273 | continue; |
274 | ||
275 | if (i > topo->num_interfaces) { | |
276 | ret = -ENOSPC; | |
277 | continue; | |
278 | } | |
279 | ||
b3b7a9f1 | 280 | memset(&kintf, 0, sizeof(kintf)); |
8309f47c MCC |
281 | |
282 | /* Copy intf fields to userspace struct */ | |
b3b7a9f1 MCC |
283 | kintf.id = intf->graph_obj.id; |
284 | kintf.intf_type = intf->type; | |
285 | kintf.flags = intf->flags; | |
8309f47c MCC |
286 | |
287 | if (media_type(&intf->graph_obj) == MEDIA_GRAPH_INTF_DEVNODE) { | |
288 | struct media_intf_devnode *devnode; | |
289 | ||
290 | devnode = intf_to_devnode(intf); | |
291 | ||
b3b7a9f1 MCC |
292 | kintf.devnode.major = devnode->major; |
293 | kintf.devnode.minor = devnode->minor; | |
8309f47c MCC |
294 | } |
295 | ||
b3b7a9f1 | 296 | if (copy_to_user(uintf, &kintf, sizeof(kintf))) |
8309f47c | 297 | ret = -EFAULT; |
b3b7a9f1 | 298 | uintf++; |
8309f47c MCC |
299 | } |
300 | topo->num_interfaces = i; | |
301 | ||
302 | /* Get pads and number of pads */ | |
303 | i = 0; | |
b3b7a9f1 | 304 | upad = media_get_uptr(topo->ptr_pads); |
8309f47c MCC |
305 | media_device_for_each_pad(pad, mdev) { |
306 | i++; | |
b3b7a9f1 | 307 | if (ret || !upad) |
8309f47c MCC |
308 | continue; |
309 | ||
310 | if (i > topo->num_pads) { | |
311 | ret = -ENOSPC; | |
312 | continue; | |
313 | } | |
314 | ||
b3b7a9f1 | 315 | memset(&kpad, 0, sizeof(kpad)); |
8309f47c MCC |
316 | |
317 | /* Copy pad fields to userspace struct */ | |
b3b7a9f1 MCC |
318 | kpad.id = pad->graph_obj.id; |
319 | kpad.entity_id = pad->entity->graph_obj.id; | |
320 | kpad.flags = pad->flags; | |
8309f47c | 321 | |
b3b7a9f1 | 322 | if (copy_to_user(upad, &kpad, sizeof(kpad))) |
8309f47c | 323 | ret = -EFAULT; |
b3b7a9f1 | 324 | upad++; |
8309f47c MCC |
325 | } |
326 | topo->num_pads = i; | |
327 | ||
328 | /* Get links and number of links */ | |
329 | i = 0; | |
b3b7a9f1 | 330 | ulink = media_get_uptr(topo->ptr_links); |
8309f47c | 331 | media_device_for_each_link(link, mdev) { |
39d1ebc6 MCC |
332 | if (link->is_backlink) |
333 | continue; | |
334 | ||
8309f47c MCC |
335 | i++; |
336 | ||
b3b7a9f1 | 337 | if (ret || !ulink) |
8309f47c MCC |
338 | continue; |
339 | ||
340 | if (i > topo->num_links) { | |
341 | ret = -ENOSPC; | |
342 | continue; | |
343 | } | |
344 | ||
b3b7a9f1 | 345 | memset(&klink, 0, sizeof(klink)); |
8309f47c MCC |
346 | |
347 | /* Copy link fields to userspace struct */ | |
b3b7a9f1 MCC |
348 | klink.id = link->graph_obj.id; |
349 | klink.source_id = link->gobj0->id; | |
350 | klink.sink_id = link->gobj1->id; | |
351 | klink.flags = link->flags; | |
8309f47c | 352 | |
b3b7a9f1 | 353 | if (copy_to_user(ulink, &klink, sizeof(klink))) |
8309f47c | 354 | ret = -EFAULT; |
b3b7a9f1 | 355 | ulink++; |
8309f47c MCC |
356 | } |
357 | topo->num_links = i; | |
358 | ||
359 | return ret; | |
360 | } | |
361 | ||
bcd5081b | 362 | static long copy_arg_from_user(void *karg, void __user *uarg, unsigned int cmd) |
8309f47c | 363 | { |
bcd5081b SA |
364 | /* All media IOCTLs are _IOWR() */ |
365 | if (copy_from_user(karg, uarg, _IOC_SIZE(cmd))) | |
a5c82e56 | 366 | return -EFAULT; |
8309f47c | 367 | |
bcd5081b SA |
368 | return 0; |
369 | } | |
8309f47c | 370 | |
bcd5081b SA |
371 | static long copy_arg_to_user(void __user *uarg, void *karg, unsigned int cmd) |
372 | { | |
373 | /* All media IOCTLs are _IOWR() */ | |
374 | if (copy_to_user(uarg, karg, _IOC_SIZE(cmd))) | |
a5c82e56 | 375 | return -EFAULT; |
8309f47c | 376 | |
a5c82e56 | 377 | return 0; |
8309f47c MCC |
378 | } |
379 | ||
7d4b6402 SA |
380 | /* Do acquire the graph mutex */ |
381 | #define MEDIA_IOC_FL_GRAPH_MUTEX BIT(0) | |
382 | ||
383 | #define MEDIA_IOC_ARG(__cmd, func, fl, from_user, to_user) \ | |
384 | [_IOC_NR(MEDIA_IOC_##__cmd)] = { \ | |
385 | .cmd = MEDIA_IOC_##__cmd, \ | |
bcd5081b | 386 | .fn = (long (*)(struct media_device *, void *))func, \ |
7d4b6402 SA |
387 | .flags = fl, \ |
388 | .arg_from_user = from_user, \ | |
389 | .arg_to_user = to_user, \ | |
6975264c | 390 | } |
cf439d5f | 391 | |
7d4b6402 SA |
392 | #define MEDIA_IOC(__cmd, func, fl) \ |
393 | MEDIA_IOC_ARG(__cmd, func, fl, copy_arg_from_user, copy_arg_to_user) | |
bcd5081b | 394 | |
cf439d5f SA |
395 | /* the table is indexed by _IOC_NR(cmd) */ |
396 | struct media_ioctl_info { | |
397 | unsigned int cmd; | |
7d4b6402 | 398 | unsigned short flags; |
bcd5081b SA |
399 | long (*fn)(struct media_device *dev, void *arg); |
400 | long (*arg_from_user)(void *karg, void __user *uarg, unsigned int cmd); | |
401 | long (*arg_to_user)(void __user *uarg, void *karg, unsigned int cmd); | |
cf439d5f SA |
402 | }; |
403 | ||
404 | static const struct media_ioctl_info ioctl_info[] = { | |
7d4b6402 SA |
405 | MEDIA_IOC(DEVICE_INFO, media_device_get_info, MEDIA_IOC_FL_GRAPH_MUTEX), |
406 | MEDIA_IOC(ENUM_ENTITIES, media_device_enum_entities, MEDIA_IOC_FL_GRAPH_MUTEX), | |
407 | MEDIA_IOC(ENUM_LINKS, media_device_enum_links, MEDIA_IOC_FL_GRAPH_MUTEX), | |
408 | MEDIA_IOC(SETUP_LINK, media_device_setup_link, MEDIA_IOC_FL_GRAPH_MUTEX), | |
409 | MEDIA_IOC(G_TOPOLOGY, media_device_get_topology, MEDIA_IOC_FL_GRAPH_MUTEX), | |
cf439d5f SA |
410 | }; |
411 | ||
140d8816 | 412 | static long media_device_ioctl(struct file *filp, unsigned int cmd, |
bcd5081b | 413 | unsigned long __arg) |
140d8816 LP |
414 | { |
415 | struct media_devnode *devnode = media_devnode_data(filp); | |
a087ce70 | 416 | struct media_device *dev = devnode->media_dev; |
6975264c | 417 | const struct media_ioctl_info *info; |
bcd5081b SA |
418 | void __user *arg = (void __user *)__arg; |
419 | char __karg[256], *karg = __karg; | |
140d8816 LP |
420 | long ret; |
421 | ||
cf439d5f SA |
422 | if (_IOC_NR(cmd) >= ARRAY_SIZE(ioctl_info) |
423 | || ioctl_info[_IOC_NR(cmd)].cmd != cmd) | |
424 | return -ENOIOCTLCMD; | |
425 | ||
6975264c SA |
426 | info = &ioctl_info[_IOC_NR(cmd)]; |
427 | ||
bcd5081b SA |
428 | if (_IOC_SIZE(info->cmd) > sizeof(__karg)) { |
429 | karg = kmalloc(_IOC_SIZE(info->cmd), GFP_KERNEL); | |
430 | if (!karg) | |
431 | return -ENOMEM; | |
432 | } | |
433 | ||
434 | if (info->arg_from_user) { | |
435 | ret = info->arg_from_user(karg, arg, cmd); | |
436 | if (ret) | |
437 | goto out_free; | |
438 | } | |
439 | ||
7d4b6402 SA |
440 | if (info->flags & MEDIA_IOC_FL_GRAPH_MUTEX) |
441 | mutex_lock(&dev->graph_mutex); | |
442 | ||
bcd5081b | 443 | ret = info->fn(dev, karg); |
7d4b6402 SA |
444 | |
445 | if (info->flags & MEDIA_IOC_FL_GRAPH_MUTEX) | |
446 | mutex_unlock(&dev->graph_mutex); | |
140d8816 | 447 | |
bcd5081b SA |
448 | if (!ret && info->arg_to_user) |
449 | ret = info->arg_to_user(arg, karg, cmd); | |
450 | ||
451 | out_free: | |
452 | if (karg != __karg) | |
453 | kfree(karg); | |
454 | ||
140d8816 LP |
455 | return ret; |
456 | } | |
457 | ||
b0a1f2a8 SA |
458 | #ifdef CONFIG_COMPAT |
459 | ||
460 | struct media_links_enum32 { | |
461 | __u32 entity; | |
462 | compat_uptr_t pads; /* struct media_pad_desc * */ | |
463 | compat_uptr_t links; /* struct media_link_desc * */ | |
464 | __u32 reserved[4]; | |
465 | }; | |
466 | ||
467 | static long media_device_enum_links32(struct media_device *mdev, | |
468 | struct media_links_enum32 __user *ulinks) | |
469 | { | |
470 | struct media_links_enum links; | |
471 | compat_uptr_t pads_ptr, links_ptr; | |
472 | ||
473 | memset(&links, 0, sizeof(links)); | |
474 | ||
475 | if (get_user(links.entity, &ulinks->entity) | |
476 | || get_user(pads_ptr, &ulinks->pads) | |
477 | || get_user(links_ptr, &ulinks->links)) | |
478 | return -EFAULT; | |
479 | ||
480 | links.pads = compat_ptr(pads_ptr); | |
481 | links.links = compat_ptr(links_ptr); | |
482 | ||
bcd5081b | 483 | return media_device_enum_links(mdev, &links); |
b0a1f2a8 SA |
484 | } |
485 | ||
486 | #define MEDIA_IOC_ENUM_LINKS32 _IOWR('|', 0x02, struct media_links_enum32) | |
487 | ||
488 | static long media_device_compat_ioctl(struct file *filp, unsigned int cmd, | |
489 | unsigned long arg) | |
490 | { | |
491 | struct media_devnode *devnode = media_devnode_data(filp); | |
a087ce70 | 492 | struct media_device *dev = devnode->media_dev; |
b0a1f2a8 SA |
493 | long ret; |
494 | ||
495 | switch (cmd) { | |
b0a1f2a8 SA |
496 | case MEDIA_IOC_ENUM_LINKS32: |
497 | mutex_lock(&dev->graph_mutex); | |
498 | ret = media_device_enum_links32(dev, | |
499 | (struct media_links_enum32 __user *)arg); | |
500 | mutex_unlock(&dev->graph_mutex); | |
501 | break; | |
502 | ||
503 | default: | |
f7369627 | 504 | return media_device_ioctl(filp, cmd, arg); |
b0a1f2a8 SA |
505 | } |
506 | ||
507 | return ret; | |
508 | } | |
509 | #endif /* CONFIG_COMPAT */ | |
510 | ||
176fb0d1 LP |
511 | static const struct media_file_operations media_device_fops = { |
512 | .owner = THIS_MODULE, | |
140d8816 LP |
513 | .open = media_device_open, |
514 | .ioctl = media_device_ioctl, | |
b0a1f2a8 SA |
515 | #ifdef CONFIG_COMPAT |
516 | .compat_ioctl = media_device_compat_ioctl, | |
517 | #endif /* CONFIG_COMPAT */ | |
140d8816 | 518 | .release = media_device_close, |
176fb0d1 LP |
519 | }; |
520 | ||
521 | /* ----------------------------------------------------------------------------- | |
522 | * sysfs | |
523 | */ | |
524 | ||
525 | static ssize_t show_model(struct device *cd, | |
526 | struct device_attribute *attr, char *buf) | |
527 | { | |
a087ce70 MCC |
528 | struct media_devnode *devnode = to_media_devnode(cd); |
529 | struct media_device *mdev = devnode->media_dev; | |
176fb0d1 LP |
530 | |
531 | return sprintf(buf, "%.*s\n", (int)sizeof(mdev->model), mdev->model); | |
532 | } | |
533 | ||
534 | static DEVICE_ATTR(model, S_IRUGO, show_model, NULL); | |
535 | ||
536 | /* ----------------------------------------------------------------------------- | |
537 | * Registration/unregistration | |
538 | */ | |
539 | ||
540 | static void media_device_release(struct media_devnode *mdev) | |
541 | { | |
8f5a3188 | 542 | dev_dbg(mdev->parent, "Media device released\n"); |
176fb0d1 LP |
543 | } |
544 | ||
b2ed8af9 MCC |
545 | /** |
546 | * media_device_register_entity - Register an entity with a media device | |
547 | * @mdev: The media device | |
548 | * @entity: The entity | |
549 | */ | |
550 | int __must_check media_device_register_entity(struct media_device *mdev, | |
551 | struct media_entity *entity) | |
552 | { | |
afcbdb55 | 553 | struct media_entity_notify *notify, *next; |
b2ed8af9 | 554 | unsigned int i; |
ba0dd729 | 555 | int ret; |
b2ed8af9 MCC |
556 | |
557 | if (entity->function == MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN || | |
558 | entity->function == MEDIA_ENT_F_UNKNOWN) | |
559 | dev_warn(mdev->dev, | |
560 | "Entity type for entity %s was not initialized!\n", | |
561 | entity->name); | |
562 | ||
563 | /* Warn if we apparently re-register an entity */ | |
564 | WARN_ON(entity->graph_obj.mdev != NULL); | |
565 | entity->graph_obj.mdev = mdev; | |
566 | INIT_LIST_HEAD(&entity->links); | |
567 | entity->num_links = 0; | |
568 | entity->num_backlinks = 0; | |
569 | ||
ba0dd729 MCC |
570 | if (!ida_pre_get(&mdev->entity_internal_idx, GFP_KERNEL)) |
571 | return -ENOMEM; | |
572 | ||
e2c91d4d | 573 | mutex_lock(&mdev->graph_mutex); |
665faa97 | 574 | |
ba0dd729 MCC |
575 | ret = ida_get_new_above(&mdev->entity_internal_idx, 1, |
576 | &entity->internal_idx); | |
577 | if (ret < 0) { | |
e2c91d4d | 578 | mutex_unlock(&mdev->graph_mutex); |
ba0dd729 | 579 | return ret; |
665faa97 SA |
580 | } |
581 | ||
582 | mdev->entity_internal_idx_max = | |
583 | max(mdev->entity_internal_idx_max, entity->internal_idx); | |
584 | ||
b2ed8af9 MCC |
585 | /* Initialize media_gobj embedded at the entity */ |
586 | media_gobj_create(mdev, MEDIA_GRAPH_ENTITY, &entity->graph_obj); | |
587 | ||
588 | /* Initialize objects at the pads */ | |
589 | for (i = 0; i < entity->num_pads; i++) | |
590 | media_gobj_create(mdev, MEDIA_GRAPH_PAD, | |
591 | &entity->pads[i].graph_obj); | |
592 | ||
afcbdb55 | 593 | /* invoke entity_notify callbacks */ |
10e81bcd SA |
594 | list_for_each_entry_safe(notify, next, &mdev->entity_notify, list) |
595 | notify->notify(entity, notify->notify_data); | |
afcbdb55 | 596 | |
0c426c47 SA |
597 | if (mdev->entity_internal_idx_max |
598 | >= mdev->pm_count_walk.ent_enum.idx_max) { | |
20b85227 | 599 | struct media_graph new = { .top = 0 }; |
0c426c47 SA |
600 | |
601 | /* | |
602 | * Initialise the new graph walk before cleaning up | |
603 | * the old one in order not to spoil the graph walk | |
604 | * object of the media device if graph walk init fails. | |
605 | */ | |
20b85227 | 606 | ret = media_graph_walk_init(&new, mdev); |
0c426c47 SA |
607 | if (ret) { |
608 | mutex_unlock(&mdev->graph_mutex); | |
609 | return ret; | |
610 | } | |
20b85227 | 611 | media_graph_walk_cleanup(&mdev->pm_count_walk); |
0c426c47 SA |
612 | mdev->pm_count_walk = new; |
613 | } | |
614 | mutex_unlock(&mdev->graph_mutex); | |
615 | ||
b2ed8af9 MCC |
616 | return 0; |
617 | } | |
618 | EXPORT_SYMBOL_GPL(media_device_register_entity); | |
619 | ||
821ed366 | 620 | static void __media_device_unregister_entity(struct media_entity *entity) |
b2ed8af9 MCC |
621 | { |
622 | struct media_device *mdev = entity->graph_obj.mdev; | |
623 | struct media_link *link, *tmp; | |
624 | struct media_interface *intf; | |
625 | unsigned int i; | |
626 | ||
665faa97 SA |
627 | ida_simple_remove(&mdev->entity_internal_idx, entity->internal_idx); |
628 | ||
b2ed8af9 MCC |
629 | /* Remove all interface links pointing to this entity */ |
630 | list_for_each_entry(intf, &mdev->interfaces, graph_obj.list) { | |
631 | list_for_each_entry_safe(link, tmp, &intf->links, list) { | |
632 | if (link->entity == entity) | |
633 | __media_remove_intf_link(link); | |
634 | } | |
635 | } | |
636 | ||
637 | /* Remove all data links that belong to this entity */ | |
638 | __media_entity_remove_links(entity); | |
639 | ||
640 | /* Remove all pads that belong to this entity */ | |
641 | for (i = 0; i < entity->num_pads; i++) | |
642 | media_gobj_destroy(&entity->pads[i].graph_obj); | |
643 | ||
644 | /* Remove the entity */ | |
645 | media_gobj_destroy(&entity->graph_obj); | |
646 | ||
afcbdb55 SK |
647 | /* invoke entity_notify callbacks to handle entity removal?? */ |
648 | ||
b2ed8af9 MCC |
649 | entity->graph_obj.mdev = NULL; |
650 | } | |
821ed366 MCC |
651 | |
652 | void media_device_unregister_entity(struct media_entity *entity) | |
653 | { | |
654 | struct media_device *mdev = entity->graph_obj.mdev; | |
655 | ||
656 | if (mdev == NULL) | |
657 | return; | |
658 | ||
e2c91d4d | 659 | mutex_lock(&mdev->graph_mutex); |
821ed366 | 660 | __media_device_unregister_entity(entity); |
e2c91d4d | 661 | mutex_unlock(&mdev->graph_mutex); |
821ed366 | 662 | } |
b2ed8af9 MCC |
663 | EXPORT_SYMBOL_GPL(media_device_unregister_entity); |
664 | ||
176fb0d1 | 665 | /** |
9832e155 | 666 | * media_device_init() - initialize a media device |
176fb0d1 LP |
667 | * @mdev: The media device |
668 | * | |
669 | * The caller is responsible for initializing the media device before | |
670 | * registration. The following fields must be set: | |
671 | * | |
672 | * - dev must point to the parent device | |
673 | * - model must be filled with the device model name | |
674 | */ | |
9832e155 | 675 | void media_device_init(struct media_device *mdev) |
176fb0d1 | 676 | { |
53e269c1 | 677 | INIT_LIST_HEAD(&mdev->entities); |
57cf79b7 | 678 | INIT_LIST_HEAD(&mdev->interfaces); |
9155d859 MCC |
679 | INIT_LIST_HEAD(&mdev->pads); |
680 | INIT_LIST_HEAD(&mdev->links); | |
afcbdb55 | 681 | INIT_LIST_HEAD(&mdev->entity_notify); |
503c3d82 | 682 | mutex_init(&mdev->graph_mutex); |
665faa97 | 683 | ida_init(&mdev->entity_internal_idx); |
53e269c1 | 684 | |
9832e155 JMC |
685 | dev_dbg(mdev->dev, "Media device initialized\n"); |
686 | } | |
687 | EXPORT_SYMBOL_GPL(media_device_init); | |
688 | ||
9832e155 JMC |
689 | void media_device_cleanup(struct media_device *mdev) |
690 | { | |
665faa97 SA |
691 | ida_destroy(&mdev->entity_internal_idx); |
692 | mdev->entity_internal_idx_max = 0; | |
20b85227 | 693 | media_graph_walk_cleanup(&mdev->pm_count_walk); |
9832e155 JMC |
694 | mutex_destroy(&mdev->graph_mutex); |
695 | } | |
696 | EXPORT_SYMBOL_GPL(media_device_cleanup); | |
697 | ||
9832e155 JMC |
698 | int __must_check __media_device_register(struct media_device *mdev, |
699 | struct module *owner) | |
700 | { | |
a087ce70 | 701 | struct media_devnode *devnode; |
9832e155 JMC |
702 | int ret; |
703 | ||
a087ce70 MCC |
704 | devnode = kzalloc(sizeof(*devnode), GFP_KERNEL); |
705 | if (!devnode) | |
706 | return -ENOMEM; | |
707 | ||
176fb0d1 | 708 | /* Register the device node. */ |
a087ce70 MCC |
709 | mdev->devnode = devnode; |
710 | devnode->fops = &media_device_fops; | |
711 | devnode->parent = mdev->dev; | |
712 | devnode->release = media_device_release; | |
8a950796 JMC |
713 | |
714 | /* Set version 0 to indicate user-space that the graph is static */ | |
715 | mdev->topology_version = 0; | |
716 | ||
a087ce70 MCC |
717 | ret = media_devnode_register(mdev, devnode, owner); |
718 | if (ret < 0) { | |
5b28dde5 | 719 | /* devnode free is handled in media_devnode_*() */ |
a087ce70 | 720 | mdev->devnode = NULL; |
176fb0d1 | 721 | return ret; |
a087ce70 | 722 | } |
176fb0d1 | 723 | |
a087ce70 | 724 | ret = device_create_file(&devnode->dev, &dev_attr_model); |
176fb0d1 | 725 | if (ret < 0) { |
5b28dde5 | 726 | /* devnode free is handled in media_devnode_*() */ |
a087ce70 | 727 | mdev->devnode = NULL; |
6f0dd24a | 728 | media_devnode_unregister_prepare(devnode); |
a087ce70 | 729 | media_devnode_unregister(devnode); |
176fb0d1 LP |
730 | return ret; |
731 | } | |
732 | ||
8f5a3188 MCC |
733 | dev_dbg(mdev->dev, "Media device registered\n"); |
734 | ||
176fb0d1 LP |
735 | return 0; |
736 | } | |
85de721c | 737 | EXPORT_SYMBOL_GPL(__media_device_register); |
176fb0d1 | 738 | |
afcbdb55 SK |
739 | int __must_check media_device_register_entity_notify(struct media_device *mdev, |
740 | struct media_entity_notify *nptr) | |
741 | { | |
e2c91d4d | 742 | mutex_lock(&mdev->graph_mutex); |
afcbdb55 | 743 | list_add_tail(&nptr->list, &mdev->entity_notify); |
e2c91d4d | 744 | mutex_unlock(&mdev->graph_mutex); |
afcbdb55 SK |
745 | return 0; |
746 | } | |
747 | EXPORT_SYMBOL_GPL(media_device_register_entity_notify); | |
748 | ||
749 | /* | |
750 | * Note: Should be called with mdev->lock held. | |
751 | */ | |
752 | static void __media_device_unregister_entity_notify(struct media_device *mdev, | |
753 | struct media_entity_notify *nptr) | |
754 | { | |
755 | list_del(&nptr->list); | |
756 | } | |
757 | ||
758 | void media_device_unregister_entity_notify(struct media_device *mdev, | |
759 | struct media_entity_notify *nptr) | |
760 | { | |
e2c91d4d | 761 | mutex_lock(&mdev->graph_mutex); |
afcbdb55 | 762 | __media_device_unregister_entity_notify(mdev, nptr); |
e2c91d4d | 763 | mutex_unlock(&mdev->graph_mutex); |
afcbdb55 SK |
764 | } |
765 | EXPORT_SYMBOL_GPL(media_device_unregister_entity_notify); | |
766 | ||
176fb0d1 LP |
767 | void media_device_unregister(struct media_device *mdev) |
768 | { | |
53e269c1 LP |
769 | struct media_entity *entity; |
770 | struct media_entity *next; | |
d47109fa | 771 | struct media_interface *intf, *tmp_intf; |
afcbdb55 | 772 | struct media_entity_notify *notify, *nextp; |
d47109fa | 773 | |
821ed366 MCC |
774 | if (mdev == NULL) |
775 | return; | |
776 | ||
e2c91d4d | 777 | mutex_lock(&mdev->graph_mutex); |
821ed366 | 778 | |
223d19c5 | 779 | /* Check if mdev was ever registered at all */ |
a087ce70 | 780 | if (!media_devnode_is_registered(mdev->devnode)) { |
e2c91d4d | 781 | mutex_unlock(&mdev->graph_mutex); |
223d19c5 | 782 | return; |
821ed366 | 783 | } |
223d19c5 | 784 | |
6f0dd24a SK |
785 | /* Clear the devnode register bit to avoid races with media dev open */ |
786 | media_devnode_unregister_prepare(mdev->devnode); | |
787 | ||
f50d5166 MCC |
788 | /* Remove all entities from the media device */ |
789 | list_for_each_entry_safe(entity, next, &mdev->entities, graph_obj.list) | |
821ed366 | 790 | __media_device_unregister_entity(entity); |
f50d5166 | 791 | |
afcbdb55 SK |
792 | /* Remove all entity_notify callbacks from the media device */ |
793 | list_for_each_entry_safe(notify, nextp, &mdev->entity_notify, list) | |
794 | __media_device_unregister_entity_notify(mdev, notify); | |
795 | ||
d47109fa | 796 | /* Remove all interfaces from the media device */ |
d47109fa MCC |
797 | list_for_each_entry_safe(intf, tmp_intf, &mdev->interfaces, |
798 | graph_obj.list) { | |
e7cd17a2 MK |
799 | /* |
800 | * Unlink the interface, but don't free it here; the | |
801 | * module which created it is responsible for freeing | |
802 | * it | |
803 | */ | |
d47109fa | 804 | __media_remove_intf_links(intf); |
c350ef83 | 805 | media_gobj_destroy(&intf->graph_obj); |
d47109fa | 806 | } |
821ed366 | 807 | |
e2c91d4d | 808 | mutex_unlock(&mdev->graph_mutex); |
53e269c1 | 809 | |
a087ce70 MCC |
810 | dev_dbg(mdev->dev, "Media device unregistered\n"); |
811 | ||
6f0dd24a SK |
812 | device_remove_file(&mdev->devnode->dev, &dev_attr_model); |
813 | media_devnode_unregister(mdev->devnode); | |
814 | /* devnode free is handled in media_devnode_*() */ | |
815 | mdev->devnode = NULL; | |
176fb0d1 LP |
816 | } |
817 | EXPORT_SYMBOL_GPL(media_device_unregister); | |
53e269c1 | 818 | |
b34ecd5a | 819 | #if IS_ENABLED(CONFIG_PCI) |
6cf5dad1 MCC |
820 | void media_device_pci_init(struct media_device *mdev, |
821 | struct pci_dev *pci_dev, | |
822 | const char *name) | |
41b44e35 | 823 | { |
41b44e35 MCC |
824 | mdev->dev = &pci_dev->dev; |
825 | ||
826 | if (name) | |
827 | strlcpy(mdev->model, name, sizeof(mdev->model)); | |
828 | else | |
829 | strlcpy(mdev->model, pci_name(pci_dev), sizeof(mdev->model)); | |
830 | ||
831 | sprintf(mdev->bus_info, "PCI:%s", pci_name(pci_dev)); | |
832 | ||
833 | mdev->hw_revision = (pci_dev->subsystem_vendor << 16) | |
834 | | pci_dev->subsystem_device; | |
835 | ||
836 | mdev->driver_version = LINUX_VERSION_CODE; | |
837 | ||
838 | media_device_init(mdev); | |
41b44e35 MCC |
839 | } |
840 | EXPORT_SYMBOL_GPL(media_device_pci_init); | |
b34ecd5a | 841 | #endif |
41b44e35 | 842 | |
b34ecd5a | 843 | #if IS_ENABLED(CONFIG_USB) |
6cf5dad1 MCC |
844 | void __media_device_usb_init(struct media_device *mdev, |
845 | struct usb_device *udev, | |
846 | const char *board_name, | |
847 | const char *driver_name) | |
41b44e35 | 848 | { |
41b44e35 MCC |
849 | mdev->dev = &udev->dev; |
850 | ||
851 | if (driver_name) | |
852 | strlcpy(mdev->driver_name, driver_name, | |
853 | sizeof(mdev->driver_name)); | |
854 | ||
855 | if (board_name) | |
856 | strlcpy(mdev->model, board_name, sizeof(mdev->model)); | |
857 | else if (udev->product) | |
858 | strlcpy(mdev->model, udev->product, sizeof(mdev->model)); | |
859 | else | |
860 | strlcpy(mdev->model, "unknown model", sizeof(mdev->model)); | |
861 | if (udev->serial) | |
862 | strlcpy(mdev->serial, udev->serial, sizeof(mdev->serial)); | |
863 | usb_make_path(udev, mdev->bus_info, sizeof(mdev->bus_info)); | |
864 | mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice); | |
865 | mdev->driver_version = LINUX_VERSION_CODE; | |
866 | ||
867 | media_device_init(mdev); | |
41b44e35 MCC |
868 | } |
869 | EXPORT_SYMBOL_GPL(__media_device_usb_init); | |
b34ecd5a | 870 | #endif |
41b44e35 MCC |
871 | |
872 | ||
e576d60b | 873 | #endif /* CONFIG_MEDIA_CONTROLLER */ |