Commit | Line | Data |
---|---|---|
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 | |
6c2c188f HV |
72 | info->media_version = LINUX_VERSION_CODE; |
73 | info->driver_version = info->media_version; | |
bcd5081b | 74 | info->hw_revision = dev->hw_revision; |
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 | } | |
fcab7573 | 193 | memset(links->reserved, 0, sizeof(links->reserved)); |
b0a1f2a8 SA |
194 | |
195 | return 0; | |
196 | } | |
197 | ||
97548ed4 | 198 | static long media_device_setup_link(struct media_device *mdev, |
bcd5081b | 199 | struct media_link_desc *linkd) |
97548ed4 LP |
200 | { |
201 | struct media_link *link = NULL; | |
97548ed4 LP |
202 | struct media_entity *source; |
203 | struct media_entity *sink; | |
97548ed4 LP |
204 | |
205 | /* Find the source and sink entities and link. | |
206 | */ | |
bcd5081b SA |
207 | source = find_entity(mdev, linkd->source.entity); |
208 | sink = find_entity(mdev, linkd->sink.entity); | |
97548ed4 LP |
209 | |
210 | if (source == NULL || sink == NULL) | |
211 | return -EINVAL; | |
212 | ||
bcd5081b SA |
213 | if (linkd->source.index >= source->num_pads || |
214 | linkd->sink.index >= sink->num_pads) | |
97548ed4 LP |
215 | return -EINVAL; |
216 | ||
bcd5081b SA |
217 | link = media_entity_find_link(&source->pads[linkd->source.index], |
218 | &sink->pads[linkd->sink.index]); | |
97548ed4 LP |
219 | if (link == NULL) |
220 | return -EINVAL; | |
221 | ||
fcab7573 HV |
222 | memset(linkd->reserved, 0, sizeof(linkd->reserved)); |
223 | ||
97548ed4 | 224 | /* Setup the link on both entities. */ |
bcd5081b | 225 | return __media_entity_setup_link(link, linkd->flags); |
97548ed4 LP |
226 | } |
227 | ||
bcd5081b | 228 | static long media_device_get_topology(struct media_device *mdev, |
8309f47c MCC |
229 | struct media_v2_topology *topo) |
230 | { | |
231 | struct media_entity *entity; | |
232 | struct media_interface *intf; | |
233 | struct media_pad *pad; | |
234 | struct media_link *link; | |
d37410c2 SA |
235 | struct media_v2_entity kentity, __user *uentity; |
236 | struct media_v2_interface kintf, __user *uintf; | |
237 | struct media_v2_pad kpad, __user *upad; | |
238 | struct media_v2_link klink, __user *ulink; | |
9033b1a4 MCC |
239 | unsigned int i; |
240 | int ret = 0; | |
8309f47c MCC |
241 | |
242 | topo->topology_version = mdev->topology_version; | |
243 | ||
244 | /* Get entities and number of entities */ | |
245 | i = 0; | |
b3b7a9f1 | 246 | uentity = media_get_uptr(topo->ptr_entities); |
8309f47c MCC |
247 | media_device_for_each_entity(entity, mdev) { |
248 | i++; | |
b3b7a9f1 | 249 | if (ret || !uentity) |
8309f47c MCC |
250 | continue; |
251 | ||
252 | if (i > topo->num_entities) { | |
253 | ret = -ENOSPC; | |
254 | continue; | |
255 | } | |
256 | ||
257 | /* Copy fields to userspace struct if not error */ | |
b3b7a9f1 MCC |
258 | memset(&kentity, 0, sizeof(kentity)); |
259 | kentity.id = entity->graph_obj.id; | |
260 | kentity.function = entity->function; | |
81b9de43 | 261 | strlcpy(kentity.name, entity->name, |
b3b7a9f1 | 262 | sizeof(kentity.name)); |
8309f47c | 263 | |
b3b7a9f1 | 264 | if (copy_to_user(uentity, &kentity, sizeof(kentity))) |
8309f47c | 265 | ret = -EFAULT; |
b3b7a9f1 | 266 | uentity++; |
8309f47c MCC |
267 | } |
268 | topo->num_entities = i; | |
baa9e910 | 269 | topo->reserved1 = 0; |
8309f47c MCC |
270 | |
271 | /* Get interfaces and number of interfaces */ | |
272 | i = 0; | |
b3b7a9f1 | 273 | uintf = media_get_uptr(topo->ptr_interfaces); |
8309f47c MCC |
274 | media_device_for_each_intf(intf, mdev) { |
275 | i++; | |
b3b7a9f1 | 276 | if (ret || !uintf) |
8309f47c MCC |
277 | continue; |
278 | ||
279 | if (i > topo->num_interfaces) { | |
280 | ret = -ENOSPC; | |
281 | continue; | |
282 | } | |
283 | ||
b3b7a9f1 | 284 | memset(&kintf, 0, sizeof(kintf)); |
8309f47c MCC |
285 | |
286 | /* Copy intf fields to userspace struct */ | |
b3b7a9f1 MCC |
287 | kintf.id = intf->graph_obj.id; |
288 | kintf.intf_type = intf->type; | |
289 | kintf.flags = intf->flags; | |
8309f47c MCC |
290 | |
291 | if (media_type(&intf->graph_obj) == MEDIA_GRAPH_INTF_DEVNODE) { | |
292 | struct media_intf_devnode *devnode; | |
293 | ||
294 | devnode = intf_to_devnode(intf); | |
295 | ||
b3b7a9f1 MCC |
296 | kintf.devnode.major = devnode->major; |
297 | kintf.devnode.minor = devnode->minor; | |
8309f47c MCC |
298 | } |
299 | ||
b3b7a9f1 | 300 | if (copy_to_user(uintf, &kintf, sizeof(kintf))) |
8309f47c | 301 | ret = -EFAULT; |
b3b7a9f1 | 302 | uintf++; |
8309f47c MCC |
303 | } |
304 | topo->num_interfaces = i; | |
baa9e910 | 305 | topo->reserved2 = 0; |
8309f47c MCC |
306 | |
307 | /* Get pads and number of pads */ | |
308 | i = 0; | |
b3b7a9f1 | 309 | upad = media_get_uptr(topo->ptr_pads); |
8309f47c MCC |
310 | media_device_for_each_pad(pad, mdev) { |
311 | i++; | |
b3b7a9f1 | 312 | if (ret || !upad) |
8309f47c MCC |
313 | continue; |
314 | ||
315 | if (i > topo->num_pads) { | |
316 | ret = -ENOSPC; | |
317 | continue; | |
318 | } | |
319 | ||
b3b7a9f1 | 320 | memset(&kpad, 0, sizeof(kpad)); |
8309f47c MCC |
321 | |
322 | /* Copy pad fields to userspace struct */ | |
b3b7a9f1 MCC |
323 | kpad.id = pad->graph_obj.id; |
324 | kpad.entity_id = pad->entity->graph_obj.id; | |
325 | kpad.flags = pad->flags; | |
8309f47c | 326 | |
b3b7a9f1 | 327 | if (copy_to_user(upad, &kpad, sizeof(kpad))) |
8309f47c | 328 | ret = -EFAULT; |
b3b7a9f1 | 329 | upad++; |
8309f47c MCC |
330 | } |
331 | topo->num_pads = i; | |
baa9e910 | 332 | topo->reserved3 = 0; |
8309f47c MCC |
333 | |
334 | /* Get links and number of links */ | |
335 | i = 0; | |
b3b7a9f1 | 336 | ulink = media_get_uptr(topo->ptr_links); |
8309f47c | 337 | media_device_for_each_link(link, mdev) { |
39d1ebc6 MCC |
338 | if (link->is_backlink) |
339 | continue; | |
340 | ||
8309f47c MCC |
341 | i++; |
342 | ||
b3b7a9f1 | 343 | if (ret || !ulink) |
8309f47c MCC |
344 | continue; |
345 | ||
346 | if (i > topo->num_links) { | |
347 | ret = -ENOSPC; | |
348 | continue; | |
349 | } | |
350 | ||
b3b7a9f1 | 351 | memset(&klink, 0, sizeof(klink)); |
8309f47c MCC |
352 | |
353 | /* Copy link fields to userspace struct */ | |
b3b7a9f1 MCC |
354 | klink.id = link->graph_obj.id; |
355 | klink.source_id = link->gobj0->id; | |
356 | klink.sink_id = link->gobj1->id; | |
357 | klink.flags = link->flags; | |
8309f47c | 358 | |
b3b7a9f1 | 359 | if (copy_to_user(ulink, &klink, sizeof(klink))) |
8309f47c | 360 | ret = -EFAULT; |
b3b7a9f1 | 361 | ulink++; |
8309f47c MCC |
362 | } |
363 | topo->num_links = i; | |
baa9e910 | 364 | topo->reserved4 = 0; |
8309f47c MCC |
365 | |
366 | return ret; | |
367 | } | |
368 | ||
bcd5081b | 369 | static long copy_arg_from_user(void *karg, void __user *uarg, unsigned int cmd) |
8309f47c | 370 | { |
bcd5081b SA |
371 | /* All media IOCTLs are _IOWR() */ |
372 | if (copy_from_user(karg, uarg, _IOC_SIZE(cmd))) | |
a5c82e56 | 373 | return -EFAULT; |
8309f47c | 374 | |
bcd5081b SA |
375 | return 0; |
376 | } | |
8309f47c | 377 | |
bcd5081b SA |
378 | static long copy_arg_to_user(void __user *uarg, void *karg, unsigned int cmd) |
379 | { | |
380 | /* All media IOCTLs are _IOWR() */ | |
381 | if (copy_to_user(uarg, karg, _IOC_SIZE(cmd))) | |
a5c82e56 | 382 | return -EFAULT; |
8309f47c | 383 | |
a5c82e56 | 384 | return 0; |
8309f47c MCC |
385 | } |
386 | ||
7d4b6402 SA |
387 | /* Do acquire the graph mutex */ |
388 | #define MEDIA_IOC_FL_GRAPH_MUTEX BIT(0) | |
389 | ||
390 | #define MEDIA_IOC_ARG(__cmd, func, fl, from_user, to_user) \ | |
391 | [_IOC_NR(MEDIA_IOC_##__cmd)] = { \ | |
392 | .cmd = MEDIA_IOC_##__cmd, \ | |
bcd5081b | 393 | .fn = (long (*)(struct media_device *, void *))func, \ |
7d4b6402 SA |
394 | .flags = fl, \ |
395 | .arg_from_user = from_user, \ | |
396 | .arg_to_user = to_user, \ | |
6975264c | 397 | } |
cf439d5f | 398 | |
7d4b6402 SA |
399 | #define MEDIA_IOC(__cmd, func, fl) \ |
400 | MEDIA_IOC_ARG(__cmd, func, fl, copy_arg_from_user, copy_arg_to_user) | |
bcd5081b | 401 | |
cf439d5f SA |
402 | /* the table is indexed by _IOC_NR(cmd) */ |
403 | struct media_ioctl_info { | |
404 | unsigned int cmd; | |
7d4b6402 | 405 | unsigned short flags; |
bcd5081b SA |
406 | long (*fn)(struct media_device *dev, void *arg); |
407 | long (*arg_from_user)(void *karg, void __user *uarg, unsigned int cmd); | |
408 | long (*arg_to_user)(void __user *uarg, void *karg, unsigned int cmd); | |
cf439d5f SA |
409 | }; |
410 | ||
411 | static const struct media_ioctl_info ioctl_info[] = { | |
7d4b6402 SA |
412 | MEDIA_IOC(DEVICE_INFO, media_device_get_info, MEDIA_IOC_FL_GRAPH_MUTEX), |
413 | MEDIA_IOC(ENUM_ENTITIES, media_device_enum_entities, MEDIA_IOC_FL_GRAPH_MUTEX), | |
414 | MEDIA_IOC(ENUM_LINKS, media_device_enum_links, MEDIA_IOC_FL_GRAPH_MUTEX), | |
415 | MEDIA_IOC(SETUP_LINK, media_device_setup_link, MEDIA_IOC_FL_GRAPH_MUTEX), | |
416 | MEDIA_IOC(G_TOPOLOGY, media_device_get_topology, MEDIA_IOC_FL_GRAPH_MUTEX), | |
cf439d5f SA |
417 | }; |
418 | ||
140d8816 | 419 | static long media_device_ioctl(struct file *filp, unsigned int cmd, |
bcd5081b | 420 | unsigned long __arg) |
140d8816 LP |
421 | { |
422 | struct media_devnode *devnode = media_devnode_data(filp); | |
a087ce70 | 423 | struct media_device *dev = devnode->media_dev; |
6975264c | 424 | const struct media_ioctl_info *info; |
bcd5081b SA |
425 | void __user *arg = (void __user *)__arg; |
426 | char __karg[256], *karg = __karg; | |
140d8816 LP |
427 | long ret; |
428 | ||
cf439d5f SA |
429 | if (_IOC_NR(cmd) >= ARRAY_SIZE(ioctl_info) |
430 | || ioctl_info[_IOC_NR(cmd)].cmd != cmd) | |
431 | return -ENOIOCTLCMD; | |
432 | ||
6975264c SA |
433 | info = &ioctl_info[_IOC_NR(cmd)]; |
434 | ||
bcd5081b SA |
435 | if (_IOC_SIZE(info->cmd) > sizeof(__karg)) { |
436 | karg = kmalloc(_IOC_SIZE(info->cmd), GFP_KERNEL); | |
437 | if (!karg) | |
438 | return -ENOMEM; | |
439 | } | |
440 | ||
441 | if (info->arg_from_user) { | |
442 | ret = info->arg_from_user(karg, arg, cmd); | |
443 | if (ret) | |
444 | goto out_free; | |
445 | } | |
446 | ||
7d4b6402 SA |
447 | if (info->flags & MEDIA_IOC_FL_GRAPH_MUTEX) |
448 | mutex_lock(&dev->graph_mutex); | |
449 | ||
bcd5081b | 450 | ret = info->fn(dev, karg); |
7d4b6402 SA |
451 | |
452 | if (info->flags & MEDIA_IOC_FL_GRAPH_MUTEX) | |
453 | mutex_unlock(&dev->graph_mutex); | |
140d8816 | 454 | |
bcd5081b SA |
455 | if (!ret && info->arg_to_user) |
456 | ret = info->arg_to_user(arg, karg, cmd); | |
457 | ||
458 | out_free: | |
459 | if (karg != __karg) | |
460 | kfree(karg); | |
461 | ||
140d8816 LP |
462 | return ret; |
463 | } | |
464 | ||
b0a1f2a8 SA |
465 | #ifdef CONFIG_COMPAT |
466 | ||
467 | struct media_links_enum32 { | |
468 | __u32 entity; | |
469 | compat_uptr_t pads; /* struct media_pad_desc * */ | |
470 | compat_uptr_t links; /* struct media_link_desc * */ | |
471 | __u32 reserved[4]; | |
472 | }; | |
473 | ||
474 | static long media_device_enum_links32(struct media_device *mdev, | |
475 | struct media_links_enum32 __user *ulinks) | |
476 | { | |
477 | struct media_links_enum links; | |
478 | compat_uptr_t pads_ptr, links_ptr; | |
479 | ||
480 | memset(&links, 0, sizeof(links)); | |
481 | ||
482 | if (get_user(links.entity, &ulinks->entity) | |
483 | || get_user(pads_ptr, &ulinks->pads) | |
484 | || get_user(links_ptr, &ulinks->links)) | |
485 | return -EFAULT; | |
486 | ||
487 | links.pads = compat_ptr(pads_ptr); | |
488 | links.links = compat_ptr(links_ptr); | |
489 | ||
bcd5081b | 490 | return media_device_enum_links(mdev, &links); |
b0a1f2a8 SA |
491 | } |
492 | ||
493 | #define MEDIA_IOC_ENUM_LINKS32 _IOWR('|', 0x02, struct media_links_enum32) | |
494 | ||
495 | static long media_device_compat_ioctl(struct file *filp, unsigned int cmd, | |
496 | unsigned long arg) | |
497 | { | |
498 | struct media_devnode *devnode = media_devnode_data(filp); | |
a087ce70 | 499 | struct media_device *dev = devnode->media_dev; |
b0a1f2a8 SA |
500 | long ret; |
501 | ||
502 | switch (cmd) { | |
b0a1f2a8 SA |
503 | case MEDIA_IOC_ENUM_LINKS32: |
504 | mutex_lock(&dev->graph_mutex); | |
505 | ret = media_device_enum_links32(dev, | |
506 | (struct media_links_enum32 __user *)arg); | |
507 | mutex_unlock(&dev->graph_mutex); | |
508 | break; | |
509 | ||
510 | default: | |
f7369627 | 511 | return media_device_ioctl(filp, cmd, arg); |
b0a1f2a8 SA |
512 | } |
513 | ||
514 | return ret; | |
515 | } | |
516 | #endif /* CONFIG_COMPAT */ | |
517 | ||
176fb0d1 LP |
518 | static const struct media_file_operations media_device_fops = { |
519 | .owner = THIS_MODULE, | |
140d8816 LP |
520 | .open = media_device_open, |
521 | .ioctl = media_device_ioctl, | |
b0a1f2a8 SA |
522 | #ifdef CONFIG_COMPAT |
523 | .compat_ioctl = media_device_compat_ioctl, | |
524 | #endif /* CONFIG_COMPAT */ | |
140d8816 | 525 | .release = media_device_close, |
176fb0d1 LP |
526 | }; |
527 | ||
528 | /* ----------------------------------------------------------------------------- | |
529 | * sysfs | |
530 | */ | |
531 | ||
532 | static ssize_t show_model(struct device *cd, | |
533 | struct device_attribute *attr, char *buf) | |
534 | { | |
a087ce70 MCC |
535 | struct media_devnode *devnode = to_media_devnode(cd); |
536 | struct media_device *mdev = devnode->media_dev; | |
176fb0d1 LP |
537 | |
538 | return sprintf(buf, "%.*s\n", (int)sizeof(mdev->model), mdev->model); | |
539 | } | |
540 | ||
541 | static DEVICE_ATTR(model, S_IRUGO, show_model, NULL); | |
542 | ||
543 | /* ----------------------------------------------------------------------------- | |
544 | * Registration/unregistration | |
545 | */ | |
546 | ||
552636be | 547 | static void media_device_release(struct media_devnode *devnode) |
176fb0d1 | 548 | { |
552636be | 549 | dev_dbg(devnode->parent, "Media device released\n"); |
176fb0d1 LP |
550 | } |
551 | ||
b2ed8af9 MCC |
552 | /** |
553 | * media_device_register_entity - Register an entity with a media device | |
554 | * @mdev: The media device | |
555 | * @entity: The entity | |
556 | */ | |
557 | int __must_check media_device_register_entity(struct media_device *mdev, | |
558 | struct media_entity *entity) | |
559 | { | |
afcbdb55 | 560 | struct media_entity_notify *notify, *next; |
b2ed8af9 | 561 | unsigned int i; |
ba0dd729 | 562 | int ret; |
b2ed8af9 MCC |
563 | |
564 | if (entity->function == MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN || | |
565 | entity->function == MEDIA_ENT_F_UNKNOWN) | |
566 | dev_warn(mdev->dev, | |
567 | "Entity type for entity %s was not initialized!\n", | |
568 | entity->name); | |
569 | ||
570 | /* Warn if we apparently re-register an entity */ | |
571 | WARN_ON(entity->graph_obj.mdev != NULL); | |
572 | entity->graph_obj.mdev = mdev; | |
573 | INIT_LIST_HEAD(&entity->links); | |
574 | entity->num_links = 0; | |
575 | entity->num_backlinks = 0; | |
576 | ||
ba0dd729 MCC |
577 | if (!ida_pre_get(&mdev->entity_internal_idx, GFP_KERNEL)) |
578 | return -ENOMEM; | |
579 | ||
e2c91d4d | 580 | mutex_lock(&mdev->graph_mutex); |
665faa97 | 581 | |
ba0dd729 MCC |
582 | ret = ida_get_new_above(&mdev->entity_internal_idx, 1, |
583 | &entity->internal_idx); | |
584 | if (ret < 0) { | |
e2c91d4d | 585 | mutex_unlock(&mdev->graph_mutex); |
ba0dd729 | 586 | return ret; |
665faa97 SA |
587 | } |
588 | ||
589 | mdev->entity_internal_idx_max = | |
590 | max(mdev->entity_internal_idx_max, entity->internal_idx); | |
591 | ||
b2ed8af9 MCC |
592 | /* Initialize media_gobj embedded at the entity */ |
593 | media_gobj_create(mdev, MEDIA_GRAPH_ENTITY, &entity->graph_obj); | |
594 | ||
595 | /* Initialize objects at the pads */ | |
596 | for (i = 0; i < entity->num_pads; i++) | |
597 | media_gobj_create(mdev, MEDIA_GRAPH_PAD, | |
598 | &entity->pads[i].graph_obj); | |
599 | ||
afcbdb55 | 600 | /* invoke entity_notify callbacks */ |
10e81bcd SA |
601 | list_for_each_entry_safe(notify, next, &mdev->entity_notify, list) |
602 | notify->notify(entity, notify->notify_data); | |
afcbdb55 | 603 | |
0c426c47 SA |
604 | if (mdev->entity_internal_idx_max |
605 | >= mdev->pm_count_walk.ent_enum.idx_max) { | |
20b85227 | 606 | struct media_graph new = { .top = 0 }; |
0c426c47 SA |
607 | |
608 | /* | |
609 | * Initialise the new graph walk before cleaning up | |
610 | * the old one in order not to spoil the graph walk | |
611 | * object of the media device if graph walk init fails. | |
612 | */ | |
20b85227 | 613 | ret = media_graph_walk_init(&new, mdev); |
0c426c47 SA |
614 | if (ret) { |
615 | mutex_unlock(&mdev->graph_mutex); | |
616 | return ret; | |
617 | } | |
20b85227 | 618 | media_graph_walk_cleanup(&mdev->pm_count_walk); |
0c426c47 SA |
619 | mdev->pm_count_walk = new; |
620 | } | |
621 | mutex_unlock(&mdev->graph_mutex); | |
622 | ||
b2ed8af9 MCC |
623 | return 0; |
624 | } | |
625 | EXPORT_SYMBOL_GPL(media_device_register_entity); | |
626 | ||
821ed366 | 627 | static void __media_device_unregister_entity(struct media_entity *entity) |
b2ed8af9 MCC |
628 | { |
629 | struct media_device *mdev = entity->graph_obj.mdev; | |
630 | struct media_link *link, *tmp; | |
631 | struct media_interface *intf; | |
632 | unsigned int i; | |
633 | ||
665faa97 SA |
634 | ida_simple_remove(&mdev->entity_internal_idx, entity->internal_idx); |
635 | ||
b2ed8af9 MCC |
636 | /* Remove all interface links pointing to this entity */ |
637 | list_for_each_entry(intf, &mdev->interfaces, graph_obj.list) { | |
638 | list_for_each_entry_safe(link, tmp, &intf->links, list) { | |
639 | if (link->entity == entity) | |
640 | __media_remove_intf_link(link); | |
641 | } | |
642 | } | |
643 | ||
644 | /* Remove all data links that belong to this entity */ | |
645 | __media_entity_remove_links(entity); | |
646 | ||
647 | /* Remove all pads that belong to this entity */ | |
648 | for (i = 0; i < entity->num_pads; i++) | |
649 | media_gobj_destroy(&entity->pads[i].graph_obj); | |
650 | ||
651 | /* Remove the entity */ | |
652 | media_gobj_destroy(&entity->graph_obj); | |
653 | ||
afcbdb55 SK |
654 | /* invoke entity_notify callbacks to handle entity removal?? */ |
655 | ||
b2ed8af9 MCC |
656 | entity->graph_obj.mdev = NULL; |
657 | } | |
821ed366 MCC |
658 | |
659 | void media_device_unregister_entity(struct media_entity *entity) | |
660 | { | |
661 | struct media_device *mdev = entity->graph_obj.mdev; | |
662 | ||
663 | if (mdev == NULL) | |
664 | return; | |
665 | ||
e2c91d4d | 666 | mutex_lock(&mdev->graph_mutex); |
821ed366 | 667 | __media_device_unregister_entity(entity); |
e2c91d4d | 668 | mutex_unlock(&mdev->graph_mutex); |
821ed366 | 669 | } |
b2ed8af9 MCC |
670 | EXPORT_SYMBOL_GPL(media_device_unregister_entity); |
671 | ||
176fb0d1 | 672 | /** |
9832e155 | 673 | * media_device_init() - initialize a media device |
176fb0d1 LP |
674 | * @mdev: The media device |
675 | * | |
676 | * The caller is responsible for initializing the media device before | |
677 | * registration. The following fields must be set: | |
678 | * | |
679 | * - dev must point to the parent device | |
680 | * - model must be filled with the device model name | |
681 | */ | |
9832e155 | 682 | void media_device_init(struct media_device *mdev) |
176fb0d1 | 683 | { |
53e269c1 | 684 | INIT_LIST_HEAD(&mdev->entities); |
57cf79b7 | 685 | INIT_LIST_HEAD(&mdev->interfaces); |
9155d859 MCC |
686 | INIT_LIST_HEAD(&mdev->pads); |
687 | INIT_LIST_HEAD(&mdev->links); | |
afcbdb55 | 688 | INIT_LIST_HEAD(&mdev->entity_notify); |
503c3d82 | 689 | mutex_init(&mdev->graph_mutex); |
665faa97 | 690 | ida_init(&mdev->entity_internal_idx); |
53e269c1 | 691 | |
9832e155 JMC |
692 | dev_dbg(mdev->dev, "Media device initialized\n"); |
693 | } | |
694 | EXPORT_SYMBOL_GPL(media_device_init); | |
695 | ||
9832e155 JMC |
696 | void media_device_cleanup(struct media_device *mdev) |
697 | { | |
665faa97 SA |
698 | ida_destroy(&mdev->entity_internal_idx); |
699 | mdev->entity_internal_idx_max = 0; | |
20b85227 | 700 | media_graph_walk_cleanup(&mdev->pm_count_walk); |
9832e155 JMC |
701 | mutex_destroy(&mdev->graph_mutex); |
702 | } | |
703 | EXPORT_SYMBOL_GPL(media_device_cleanup); | |
704 | ||
9832e155 JMC |
705 | int __must_check __media_device_register(struct media_device *mdev, |
706 | struct module *owner) | |
707 | { | |
a087ce70 | 708 | struct media_devnode *devnode; |
9832e155 JMC |
709 | int ret; |
710 | ||
a087ce70 MCC |
711 | devnode = kzalloc(sizeof(*devnode), GFP_KERNEL); |
712 | if (!devnode) | |
713 | return -ENOMEM; | |
714 | ||
176fb0d1 | 715 | /* Register the device node. */ |
a087ce70 MCC |
716 | mdev->devnode = devnode; |
717 | devnode->fops = &media_device_fops; | |
718 | devnode->parent = mdev->dev; | |
719 | devnode->release = media_device_release; | |
8a950796 JMC |
720 | |
721 | /* Set version 0 to indicate user-space that the graph is static */ | |
722 | mdev->topology_version = 0; | |
723 | ||
a087ce70 MCC |
724 | ret = media_devnode_register(mdev, devnode, owner); |
725 | if (ret < 0) { | |
5b28dde5 | 726 | /* devnode free is handled in media_devnode_*() */ |
a087ce70 | 727 | mdev->devnode = NULL; |
176fb0d1 | 728 | return ret; |
a087ce70 | 729 | } |
176fb0d1 | 730 | |
a087ce70 | 731 | ret = device_create_file(&devnode->dev, &dev_attr_model); |
176fb0d1 | 732 | if (ret < 0) { |
5b28dde5 | 733 | /* devnode free is handled in media_devnode_*() */ |
a087ce70 | 734 | mdev->devnode = NULL; |
6f0dd24a | 735 | media_devnode_unregister_prepare(devnode); |
a087ce70 | 736 | media_devnode_unregister(devnode); |
176fb0d1 LP |
737 | return ret; |
738 | } | |
739 | ||
8f5a3188 MCC |
740 | dev_dbg(mdev->dev, "Media device registered\n"); |
741 | ||
176fb0d1 LP |
742 | return 0; |
743 | } | |
85de721c | 744 | EXPORT_SYMBOL_GPL(__media_device_register); |
176fb0d1 | 745 | |
afcbdb55 SK |
746 | int __must_check media_device_register_entity_notify(struct media_device *mdev, |
747 | struct media_entity_notify *nptr) | |
748 | { | |
e2c91d4d | 749 | mutex_lock(&mdev->graph_mutex); |
afcbdb55 | 750 | list_add_tail(&nptr->list, &mdev->entity_notify); |
e2c91d4d | 751 | mutex_unlock(&mdev->graph_mutex); |
afcbdb55 SK |
752 | return 0; |
753 | } | |
754 | EXPORT_SYMBOL_GPL(media_device_register_entity_notify); | |
755 | ||
756 | /* | |
757 | * Note: Should be called with mdev->lock held. | |
758 | */ | |
759 | static void __media_device_unregister_entity_notify(struct media_device *mdev, | |
760 | struct media_entity_notify *nptr) | |
761 | { | |
762 | list_del(&nptr->list); | |
763 | } | |
764 | ||
765 | void media_device_unregister_entity_notify(struct media_device *mdev, | |
766 | struct media_entity_notify *nptr) | |
767 | { | |
e2c91d4d | 768 | mutex_lock(&mdev->graph_mutex); |
afcbdb55 | 769 | __media_device_unregister_entity_notify(mdev, nptr); |
e2c91d4d | 770 | mutex_unlock(&mdev->graph_mutex); |
afcbdb55 SK |
771 | } |
772 | EXPORT_SYMBOL_GPL(media_device_unregister_entity_notify); | |
773 | ||
176fb0d1 LP |
774 | void media_device_unregister(struct media_device *mdev) |
775 | { | |
53e269c1 LP |
776 | struct media_entity *entity; |
777 | struct media_entity *next; | |
d47109fa | 778 | struct media_interface *intf, *tmp_intf; |
afcbdb55 | 779 | struct media_entity_notify *notify, *nextp; |
d47109fa | 780 | |
821ed366 MCC |
781 | if (mdev == NULL) |
782 | return; | |
783 | ||
e2c91d4d | 784 | mutex_lock(&mdev->graph_mutex); |
821ed366 | 785 | |
223d19c5 | 786 | /* Check if mdev was ever registered at all */ |
a087ce70 | 787 | if (!media_devnode_is_registered(mdev->devnode)) { |
e2c91d4d | 788 | mutex_unlock(&mdev->graph_mutex); |
223d19c5 | 789 | return; |
821ed366 | 790 | } |
223d19c5 | 791 | |
6f0dd24a SK |
792 | /* Clear the devnode register bit to avoid races with media dev open */ |
793 | media_devnode_unregister_prepare(mdev->devnode); | |
794 | ||
f50d5166 MCC |
795 | /* Remove all entities from the media device */ |
796 | list_for_each_entry_safe(entity, next, &mdev->entities, graph_obj.list) | |
821ed366 | 797 | __media_device_unregister_entity(entity); |
f50d5166 | 798 | |
afcbdb55 SK |
799 | /* Remove all entity_notify callbacks from the media device */ |
800 | list_for_each_entry_safe(notify, nextp, &mdev->entity_notify, list) | |
801 | __media_device_unregister_entity_notify(mdev, notify); | |
802 | ||
d47109fa | 803 | /* Remove all interfaces from the media device */ |
d47109fa MCC |
804 | list_for_each_entry_safe(intf, tmp_intf, &mdev->interfaces, |
805 | graph_obj.list) { | |
e7cd17a2 MK |
806 | /* |
807 | * Unlink the interface, but don't free it here; the | |
808 | * module which created it is responsible for freeing | |
809 | * it | |
810 | */ | |
d47109fa | 811 | __media_remove_intf_links(intf); |
c350ef83 | 812 | media_gobj_destroy(&intf->graph_obj); |
d47109fa | 813 | } |
821ed366 | 814 | |
e2c91d4d | 815 | mutex_unlock(&mdev->graph_mutex); |
53e269c1 | 816 | |
a087ce70 MCC |
817 | dev_dbg(mdev->dev, "Media device unregistered\n"); |
818 | ||
6f0dd24a SK |
819 | device_remove_file(&mdev->devnode->dev, &dev_attr_model); |
820 | media_devnode_unregister(mdev->devnode); | |
821 | /* devnode free is handled in media_devnode_*() */ | |
822 | mdev->devnode = NULL; | |
176fb0d1 LP |
823 | } |
824 | EXPORT_SYMBOL_GPL(media_device_unregister); | |
53e269c1 | 825 | |
b34ecd5a | 826 | #if IS_ENABLED(CONFIG_PCI) |
6cf5dad1 MCC |
827 | void media_device_pci_init(struct media_device *mdev, |
828 | struct pci_dev *pci_dev, | |
829 | const char *name) | |
41b44e35 | 830 | { |
41b44e35 MCC |
831 | mdev->dev = &pci_dev->dev; |
832 | ||
833 | if (name) | |
834 | strlcpy(mdev->model, name, sizeof(mdev->model)); | |
835 | else | |
836 | strlcpy(mdev->model, pci_name(pci_dev), sizeof(mdev->model)); | |
837 | ||
838 | sprintf(mdev->bus_info, "PCI:%s", pci_name(pci_dev)); | |
839 | ||
840 | mdev->hw_revision = (pci_dev->subsystem_vendor << 16) | |
841 | | pci_dev->subsystem_device; | |
842 | ||
41b44e35 | 843 | media_device_init(mdev); |
41b44e35 MCC |
844 | } |
845 | EXPORT_SYMBOL_GPL(media_device_pci_init); | |
b34ecd5a | 846 | #endif |
41b44e35 | 847 | |
b34ecd5a | 848 | #if IS_ENABLED(CONFIG_USB) |
6cf5dad1 MCC |
849 | void __media_device_usb_init(struct media_device *mdev, |
850 | struct usb_device *udev, | |
851 | const char *board_name, | |
852 | const char *driver_name) | |
41b44e35 | 853 | { |
41b44e35 MCC |
854 | mdev->dev = &udev->dev; |
855 | ||
856 | if (driver_name) | |
857 | strlcpy(mdev->driver_name, driver_name, | |
858 | sizeof(mdev->driver_name)); | |
859 | ||
860 | if (board_name) | |
861 | strlcpy(mdev->model, board_name, sizeof(mdev->model)); | |
862 | else if (udev->product) | |
863 | strlcpy(mdev->model, udev->product, sizeof(mdev->model)); | |
864 | else | |
865 | strlcpy(mdev->model, "unknown model", sizeof(mdev->model)); | |
866 | if (udev->serial) | |
867 | strlcpy(mdev->serial, udev->serial, sizeof(mdev->serial)); | |
868 | usb_make_path(udev, mdev->bus_info, sizeof(mdev->bus_info)); | |
869 | mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice); | |
41b44e35 MCC |
870 | |
871 | media_device_init(mdev); | |
41b44e35 MCC |
872 | } |
873 | EXPORT_SYMBOL_GPL(__media_device_usb_init); | |
b34ecd5a | 874 | #endif |
41b44e35 MCC |
875 | |
876 | ||
e576d60b | 877 | #endif /* CONFIG_MEDIA_CONTROLLER */ |