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 | ||
b0a1f2a8 SA |
19 | #include <linux/compat.h> |
20 | #include <linux/export.h> | |
665faa97 | 21 | #include <linux/idr.h> |
176fb0d1 | 22 | #include <linux/ioctl.h> |
140d8816 | 23 | #include <linux/media.h> |
57208e5e | 24 | #include <linux/slab.h> |
497e80cd | 25 | #include <linux/types.h> |
41b44e35 MCC |
26 | #include <linux/pci.h> |
27 | #include <linux/usb.h> | |
87e1a881 | 28 | #include <linux/version.h> |
176fb0d1 LP |
29 | |
30 | #include <media/media-device.h> | |
31 | #include <media/media-devnode.h> | |
53e269c1 | 32 | #include <media/media-entity.h> |
10905d70 | 33 | #include <media/media-request.h> |
176fb0d1 | 34 | |
e576d60b SK |
35 | #ifdef CONFIG_MEDIA_CONTROLLER |
36 | ||
e1a98c16 HV |
37 | /* |
38 | * Legacy defines from linux/media.h. This is the only place we need this | |
39 | * so we just define it here. The media.h header doesn't expose it to the | |
40 | * kernel to prevent it from being used by drivers, but here (and only here!) | |
41 | * we need it to handle the legacy behavior. | |
42 | */ | |
43 | #define MEDIA_ENT_SUBTYPE_MASK 0x0000ffff | |
44 | #define MEDIA_ENT_T_DEVNODE_UNKNOWN (MEDIA_ENT_F_OLD_BASE | \ | |
45 | MEDIA_ENT_SUBTYPE_MASK) | |
46 | ||
140d8816 LP |
47 | /* ----------------------------------------------------------------------------- |
48 | * Userspace API | |
49 | */ | |
50 | ||
0629e991 SA |
51 | static inline void __user *media_get_uptr(__u64 arg) |
52 | { | |
53 | return (void __user *)(uintptr_t)arg; | |
54 | } | |
55 | ||
140d8816 LP |
56 | static int media_device_open(struct file *filp) |
57 | { | |
58 | return 0; | |
59 | } | |
60 | ||
61 | static int media_device_close(struct file *filp) | |
62 | { | |
63 | return 0; | |
64 | } | |
65 | ||
daa36370 | 66 | static long media_device_get_info(struct media_device *dev, void *arg) |
140d8816 | 67 | { |
daa36370 ST |
68 | struct media_device_info *info = arg; |
69 | ||
bcd5081b | 70 | memset(info, 0, sizeof(*info)); |
140d8816 | 71 | |
bb07bd6b | 72 | if (dev->driver_name[0]) |
c0decac1 | 73 | strscpy(info->driver, dev->driver_name, sizeof(info->driver)); |
bb07bd6b | 74 | else |
c0decac1 | 75 | strscpy(info->driver, dev->dev->driver->name, |
bcd5081b | 76 | sizeof(info->driver)); |
bb07bd6b | 77 | |
c0decac1 MCC |
78 | strscpy(info->model, dev->model, sizeof(info->model)); |
79 | strscpy(info->serial, dev->serial, sizeof(info->serial)); | |
80 | strscpy(info->bus_info, dev->bus_info, sizeof(info->bus_info)); | |
140d8816 | 81 | |
6c2c188f HV |
82 | info->media_version = LINUX_VERSION_CODE; |
83 | info->driver_version = info->media_version; | |
bcd5081b | 84 | info->hw_revision = dev->hw_revision; |
140d8816 | 85 | |
b17d3945 | 86 | return 0; |
140d8816 LP |
87 | } |
88 | ||
1651333b LP |
89 | static struct media_entity *find_entity(struct media_device *mdev, u32 id) |
90 | { | |
91 | struct media_entity *entity; | |
92 | int next = id & MEDIA_ENT_ID_FLAG_NEXT; | |
93 | ||
94 | id &= ~MEDIA_ENT_ID_FLAG_NEXT; | |
95 | ||
1651333b | 96 | media_device_for_each_entity(entity, mdev) { |
fa762394 MCC |
97 | if (((media_entity_id(entity) == id) && !next) || |
98 | ((media_entity_id(entity) > id) && next)) { | |
1651333b LP |
99 | return entity; |
100 | } | |
101 | } | |
102 | ||
1651333b LP |
103 | return NULL; |
104 | } | |
105 | ||
daa36370 | 106 | static long media_device_enum_entities(struct media_device *mdev, void *arg) |
1651333b | 107 | { |
daa36370 | 108 | struct media_entity_desc *entd = arg; |
1651333b | 109 | struct media_entity *ent; |
1651333b | 110 | |
bcd5081b | 111 | ent = find_entity(mdev, entd->id); |
1651333b LP |
112 | if (ent == NULL) |
113 | return -EINVAL; | |
114 | ||
bcd5081b SA |
115 | memset(entd, 0, sizeof(*entd)); |
116 | ||
117 | entd->id = media_entity_id(ent); | |
de8eae36 | 118 | if (ent->name) |
c0decac1 | 119 | strscpy(entd->name, ent->name, sizeof(entd->name)); |
bcd5081b SA |
120 | entd->type = ent->function; |
121 | entd->revision = 0; /* Unused */ | |
122 | entd->flags = ent->flags; | |
123 | entd->group_id = 0; /* Unused */ | |
124 | entd->pads = ent->num_pads; | |
125 | entd->links = ent->num_links - ent->num_backlinks; | |
b2cd2744 MCC |
126 | |
127 | /* | |
128 | * Workaround for a bug at media-ctl <= v1.10 that makes it to | |
129 | * do the wrong thing if the entity function doesn't belong to | |
130 | * either MEDIA_ENT_F_OLD_BASE or MEDIA_ENT_F_OLD_SUBDEV_BASE | |
131 | * Ranges. | |
132 | * | |
133 | * Non-subdevices are expected to be at the MEDIA_ENT_F_OLD_BASE, | |
134 | * or, otherwise, will be silently ignored by media-ctl when | |
135 | * printing the graphviz diagram. So, map them into the devnode | |
136 | * old range. | |
137 | */ | |
138 | if (ent->function < MEDIA_ENT_F_OLD_BASE || | |
98d85f3c | 139 | ent->function > MEDIA_ENT_F_TUNER) { |
b2cd2744 | 140 | if (is_media_entity_v4l2_subdev(ent)) |
bcd5081b | 141 | entd->type = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN; |
b2cd2744 | 142 | else if (ent->function != MEDIA_ENT_F_IO_V4L) |
bcd5081b | 143 | entd->type = MEDIA_ENT_T_DEVNODE_UNKNOWN; |
b2cd2744 MCC |
144 | } |
145 | ||
bcd5081b SA |
146 | memcpy(&entd->raw, &ent->info, sizeof(ent->info)); |
147 | ||
1651333b LP |
148 | return 0; |
149 | } | |
150 | ||
151 | static void media_device_kpad_to_upad(const struct media_pad *kpad, | |
152 | struct media_pad_desc *upad) | |
153 | { | |
fa762394 | 154 | upad->entity = media_entity_id(kpad->entity); |
1651333b LP |
155 | upad->index = kpad->index; |
156 | upad->flags = kpad->flags; | |
157 | } | |
158 | ||
daa36370 | 159 | static long media_device_enum_links(struct media_device *mdev, void *arg) |
1651333b | 160 | { |
daa36370 | 161 | struct media_links_enum *links = arg; |
1651333b | 162 | struct media_entity *entity; |
1651333b | 163 | |
b0a1f2a8 | 164 | entity = find_entity(mdev, links->entity); |
1651333b LP |
165 | if (entity == NULL) |
166 | return -EINVAL; | |
167 | ||
b0a1f2a8 | 168 | if (links->pads) { |
1651333b LP |
169 | unsigned int p; |
170 | ||
171 | for (p = 0; p < entity->num_pads; p++) { | |
172 | struct media_pad_desc pad; | |
c88e739b DC |
173 | |
174 | memset(&pad, 0, sizeof(pad)); | |
1651333b | 175 | media_device_kpad_to_upad(&entity->pads[p], &pad); |
b0a1f2a8 | 176 | if (copy_to_user(&links->pads[p], &pad, sizeof(pad))) |
1651333b LP |
177 | return -EFAULT; |
178 | } | |
179 | } | |
180 | ||
b0a1f2a8 | 181 | if (links->links) { |
b83e2508 MCC |
182 | struct media_link *link; |
183 | struct media_link_desc __user *ulink_desc = links->links; | |
1651333b | 184 | |
b83e2508 MCC |
185 | list_for_each_entry(link, &entity->links, list) { |
186 | struct media_link_desc klink_desc; | |
1651333b LP |
187 | |
188 | /* Ignore backlinks. */ | |
b83e2508 | 189 | if (link->source->entity != entity) |
1651333b | 190 | continue; |
b83e2508 MCC |
191 | memset(&klink_desc, 0, sizeof(klink_desc)); |
192 | media_device_kpad_to_upad(link->source, | |
193 | &klink_desc.source); | |
194 | media_device_kpad_to_upad(link->sink, | |
195 | &klink_desc.sink); | |
196 | klink_desc.flags = link->flags; | |
197 | if (copy_to_user(ulink_desc, &klink_desc, | |
198 | sizeof(*ulink_desc))) | |
1651333b | 199 | return -EFAULT; |
b83e2508 | 200 | ulink_desc++; |
1651333b LP |
201 | } |
202 | } | |
fcab7573 | 203 | memset(links->reserved, 0, sizeof(links->reserved)); |
b0a1f2a8 SA |
204 | |
205 | return 0; | |
206 | } | |
207 | ||
daa36370 | 208 | static long media_device_setup_link(struct media_device *mdev, void *arg) |
97548ed4 | 209 | { |
daa36370 | 210 | struct media_link_desc *linkd = arg; |
97548ed4 | 211 | struct media_link *link = NULL; |
97548ed4 LP |
212 | struct media_entity *source; |
213 | struct media_entity *sink; | |
97548ed4 LP |
214 | |
215 | /* Find the source and sink entities and link. | |
216 | */ | |
bcd5081b SA |
217 | source = find_entity(mdev, linkd->source.entity); |
218 | sink = find_entity(mdev, linkd->sink.entity); | |
97548ed4 LP |
219 | |
220 | if (source == NULL || sink == NULL) | |
221 | return -EINVAL; | |
222 | ||
bcd5081b SA |
223 | if (linkd->source.index >= source->num_pads || |
224 | linkd->sink.index >= sink->num_pads) | |
97548ed4 LP |
225 | return -EINVAL; |
226 | ||
bcd5081b SA |
227 | link = media_entity_find_link(&source->pads[linkd->source.index], |
228 | &sink->pads[linkd->sink.index]); | |
97548ed4 LP |
229 | if (link == NULL) |
230 | return -EINVAL; | |
231 | ||
fcab7573 HV |
232 | memset(linkd->reserved, 0, sizeof(linkd->reserved)); |
233 | ||
97548ed4 | 234 | /* Setup the link on both entities. */ |
bcd5081b | 235 | return __media_entity_setup_link(link, linkd->flags); |
97548ed4 LP |
236 | } |
237 | ||
daa36370 | 238 | static long media_device_get_topology(struct media_device *mdev, void *arg) |
8309f47c | 239 | { |
daa36370 | 240 | struct media_v2_topology *topo = arg; |
8309f47c MCC |
241 | struct media_entity *entity; |
242 | struct media_interface *intf; | |
243 | struct media_pad *pad; | |
244 | struct media_link *link; | |
d37410c2 SA |
245 | struct media_v2_entity kentity, __user *uentity; |
246 | struct media_v2_interface kintf, __user *uintf; | |
247 | struct media_v2_pad kpad, __user *upad; | |
248 | struct media_v2_link klink, __user *ulink; | |
9033b1a4 MCC |
249 | unsigned int i; |
250 | int ret = 0; | |
8309f47c MCC |
251 | |
252 | topo->topology_version = mdev->topology_version; | |
253 | ||
254 | /* Get entities and number of entities */ | |
255 | i = 0; | |
b3b7a9f1 | 256 | uentity = media_get_uptr(topo->ptr_entities); |
8309f47c MCC |
257 | media_device_for_each_entity(entity, mdev) { |
258 | i++; | |
b3b7a9f1 | 259 | if (ret || !uentity) |
8309f47c MCC |
260 | continue; |
261 | ||
262 | if (i > topo->num_entities) { | |
263 | ret = -ENOSPC; | |
264 | continue; | |
265 | } | |
266 | ||
267 | /* Copy fields to userspace struct if not error */ | |
b3b7a9f1 MCC |
268 | memset(&kentity, 0, sizeof(kentity)); |
269 | kentity.id = entity->graph_obj.id; | |
270 | kentity.function = entity->function; | |
588f4ee7 | 271 | kentity.flags = entity->flags; |
c0decac1 | 272 | strscpy(kentity.name, entity->name, |
b3b7a9f1 | 273 | sizeof(kentity.name)); |
8309f47c | 274 | |
b3b7a9f1 | 275 | if (copy_to_user(uentity, &kentity, sizeof(kentity))) |
8309f47c | 276 | ret = -EFAULT; |
b3b7a9f1 | 277 | uentity++; |
8309f47c MCC |
278 | } |
279 | topo->num_entities = i; | |
baa9e910 | 280 | topo->reserved1 = 0; |
8309f47c MCC |
281 | |
282 | /* Get interfaces and number of interfaces */ | |
283 | i = 0; | |
b3b7a9f1 | 284 | uintf = media_get_uptr(topo->ptr_interfaces); |
8309f47c MCC |
285 | media_device_for_each_intf(intf, mdev) { |
286 | i++; | |
b3b7a9f1 | 287 | if (ret || !uintf) |
8309f47c MCC |
288 | continue; |
289 | ||
290 | if (i > topo->num_interfaces) { | |
291 | ret = -ENOSPC; | |
292 | continue; | |
293 | } | |
294 | ||
b3b7a9f1 | 295 | memset(&kintf, 0, sizeof(kintf)); |
8309f47c MCC |
296 | |
297 | /* Copy intf fields to userspace struct */ | |
b3b7a9f1 MCC |
298 | kintf.id = intf->graph_obj.id; |
299 | kintf.intf_type = intf->type; | |
300 | kintf.flags = intf->flags; | |
8309f47c MCC |
301 | |
302 | if (media_type(&intf->graph_obj) == MEDIA_GRAPH_INTF_DEVNODE) { | |
303 | struct media_intf_devnode *devnode; | |
304 | ||
305 | devnode = intf_to_devnode(intf); | |
306 | ||
b3b7a9f1 MCC |
307 | kintf.devnode.major = devnode->major; |
308 | kintf.devnode.minor = devnode->minor; | |
8309f47c MCC |
309 | } |
310 | ||
b3b7a9f1 | 311 | if (copy_to_user(uintf, &kintf, sizeof(kintf))) |
8309f47c | 312 | ret = -EFAULT; |
b3b7a9f1 | 313 | uintf++; |
8309f47c MCC |
314 | } |
315 | topo->num_interfaces = i; | |
baa9e910 | 316 | topo->reserved2 = 0; |
8309f47c MCC |
317 | |
318 | /* Get pads and number of pads */ | |
319 | i = 0; | |
b3b7a9f1 | 320 | upad = media_get_uptr(topo->ptr_pads); |
8309f47c MCC |
321 | media_device_for_each_pad(pad, mdev) { |
322 | i++; | |
b3b7a9f1 | 323 | if (ret || !upad) |
8309f47c MCC |
324 | continue; |
325 | ||
326 | if (i > topo->num_pads) { | |
327 | ret = -ENOSPC; | |
328 | continue; | |
329 | } | |
330 | ||
b3b7a9f1 | 331 | memset(&kpad, 0, sizeof(kpad)); |
8309f47c MCC |
332 | |
333 | /* Copy pad fields to userspace struct */ | |
b3b7a9f1 MCC |
334 | kpad.id = pad->graph_obj.id; |
335 | kpad.entity_id = pad->entity->graph_obj.id; | |
336 | kpad.flags = pad->flags; | |
30b914c8 | 337 | kpad.index = pad->index; |
8309f47c | 338 | |
b3b7a9f1 | 339 | if (copy_to_user(upad, &kpad, sizeof(kpad))) |
8309f47c | 340 | ret = -EFAULT; |
b3b7a9f1 | 341 | upad++; |
8309f47c MCC |
342 | } |
343 | topo->num_pads = i; | |
baa9e910 | 344 | topo->reserved3 = 0; |
8309f47c MCC |
345 | |
346 | /* Get links and number of links */ | |
347 | i = 0; | |
b3b7a9f1 | 348 | ulink = media_get_uptr(topo->ptr_links); |
8309f47c | 349 | media_device_for_each_link(link, mdev) { |
39d1ebc6 MCC |
350 | if (link->is_backlink) |
351 | continue; | |
352 | ||
8309f47c MCC |
353 | i++; |
354 | ||
b3b7a9f1 | 355 | if (ret || !ulink) |
8309f47c MCC |
356 | continue; |
357 | ||
358 | if (i > topo->num_links) { | |
359 | ret = -ENOSPC; | |
360 | continue; | |
361 | } | |
362 | ||
b3b7a9f1 | 363 | memset(&klink, 0, sizeof(klink)); |
8309f47c MCC |
364 | |
365 | /* Copy link fields to userspace struct */ | |
b3b7a9f1 MCC |
366 | klink.id = link->graph_obj.id; |
367 | klink.source_id = link->gobj0->id; | |
368 | klink.sink_id = link->gobj1->id; | |
369 | klink.flags = link->flags; | |
8309f47c | 370 | |
b3b7a9f1 | 371 | if (copy_to_user(ulink, &klink, sizeof(klink))) |
8309f47c | 372 | ret = -EFAULT; |
b3b7a9f1 | 373 | ulink++; |
8309f47c MCC |
374 | } |
375 | topo->num_links = i; | |
baa9e910 | 376 | topo->reserved4 = 0; |
8309f47c MCC |
377 | |
378 | return ret; | |
379 | } | |
380 | ||
10905d70 HV |
381 | static long media_device_request_alloc(struct media_device *mdev, |
382 | int *alloc_fd) | |
383 | { | |
078ab3ea | 384 | #ifdef CONFIG_MEDIA_CONTROLLER_REQUEST_API |
10905d70 HV |
385 | if (!mdev->ops || !mdev->ops->req_validate || !mdev->ops->req_queue) |
386 | return -ENOTTY; | |
387 | ||
388 | return media_request_alloc(mdev, alloc_fd); | |
078ab3ea SA |
389 | #else |
390 | return -ENOTTY; | |
391 | #endif | |
10905d70 HV |
392 | } |
393 | ||
bcd5081b | 394 | static long copy_arg_from_user(void *karg, void __user *uarg, unsigned int cmd) |
8309f47c | 395 | { |
10905d70 HV |
396 | if ((_IOC_DIR(cmd) & _IOC_WRITE) && |
397 | copy_from_user(karg, uarg, _IOC_SIZE(cmd))) | |
a5c82e56 | 398 | return -EFAULT; |
8309f47c | 399 | |
bcd5081b SA |
400 | return 0; |
401 | } | |
8309f47c | 402 | |
bcd5081b SA |
403 | static long copy_arg_to_user(void __user *uarg, void *karg, unsigned int cmd) |
404 | { | |
10905d70 HV |
405 | if ((_IOC_DIR(cmd) & _IOC_READ) && |
406 | copy_to_user(uarg, karg, _IOC_SIZE(cmd))) | |
a5c82e56 | 407 | return -EFAULT; |
8309f47c | 408 | |
a5c82e56 | 409 | return 0; |
8309f47c MCC |
410 | } |
411 | ||
7d4b6402 SA |
412 | /* Do acquire the graph mutex */ |
413 | #define MEDIA_IOC_FL_GRAPH_MUTEX BIT(0) | |
414 | ||
415 | #define MEDIA_IOC_ARG(__cmd, func, fl, from_user, to_user) \ | |
416 | [_IOC_NR(MEDIA_IOC_##__cmd)] = { \ | |
417 | .cmd = MEDIA_IOC_##__cmd, \ | |
bcd5081b | 418 | .fn = (long (*)(struct media_device *, void *))func, \ |
7d4b6402 SA |
419 | .flags = fl, \ |
420 | .arg_from_user = from_user, \ | |
421 | .arg_to_user = to_user, \ | |
6975264c | 422 | } |
cf439d5f | 423 | |
7d4b6402 SA |
424 | #define MEDIA_IOC(__cmd, func, fl) \ |
425 | MEDIA_IOC_ARG(__cmd, func, fl, copy_arg_from_user, copy_arg_to_user) | |
bcd5081b | 426 | |
cf439d5f SA |
427 | /* the table is indexed by _IOC_NR(cmd) */ |
428 | struct media_ioctl_info { | |
429 | unsigned int cmd; | |
7d4b6402 | 430 | unsigned short flags; |
bcd5081b SA |
431 | long (*fn)(struct media_device *dev, void *arg); |
432 | long (*arg_from_user)(void *karg, void __user *uarg, unsigned int cmd); | |
433 | long (*arg_to_user)(void __user *uarg, void *karg, unsigned int cmd); | |
cf439d5f SA |
434 | }; |
435 | ||
436 | static const struct media_ioctl_info ioctl_info[] = { | |
7d4b6402 SA |
437 | MEDIA_IOC(DEVICE_INFO, media_device_get_info, MEDIA_IOC_FL_GRAPH_MUTEX), |
438 | MEDIA_IOC(ENUM_ENTITIES, media_device_enum_entities, MEDIA_IOC_FL_GRAPH_MUTEX), | |
439 | MEDIA_IOC(ENUM_LINKS, media_device_enum_links, MEDIA_IOC_FL_GRAPH_MUTEX), | |
440 | MEDIA_IOC(SETUP_LINK, media_device_setup_link, MEDIA_IOC_FL_GRAPH_MUTEX), | |
441 | MEDIA_IOC(G_TOPOLOGY, media_device_get_topology, MEDIA_IOC_FL_GRAPH_MUTEX), | |
10905d70 | 442 | MEDIA_IOC(REQUEST_ALLOC, media_device_request_alloc, 0), |
cf439d5f SA |
443 | }; |
444 | ||
140d8816 | 445 | static long media_device_ioctl(struct file *filp, unsigned int cmd, |
bcd5081b | 446 | unsigned long __arg) |
140d8816 LP |
447 | { |
448 | struct media_devnode *devnode = media_devnode_data(filp); | |
a087ce70 | 449 | struct media_device *dev = devnode->media_dev; |
6975264c | 450 | const struct media_ioctl_info *info; |
bcd5081b SA |
451 | void __user *arg = (void __user *)__arg; |
452 | char __karg[256], *karg = __karg; | |
140d8816 LP |
453 | long ret; |
454 | ||
cf439d5f SA |
455 | if (_IOC_NR(cmd) >= ARRAY_SIZE(ioctl_info) |
456 | || ioctl_info[_IOC_NR(cmd)].cmd != cmd) | |
457 | return -ENOIOCTLCMD; | |
458 | ||
6975264c SA |
459 | info = &ioctl_info[_IOC_NR(cmd)]; |
460 | ||
bcd5081b SA |
461 | if (_IOC_SIZE(info->cmd) > sizeof(__karg)) { |
462 | karg = kmalloc(_IOC_SIZE(info->cmd), GFP_KERNEL); | |
463 | if (!karg) | |
464 | return -ENOMEM; | |
465 | } | |
466 | ||
467 | if (info->arg_from_user) { | |
468 | ret = info->arg_from_user(karg, arg, cmd); | |
469 | if (ret) | |
470 | goto out_free; | |
471 | } | |
472 | ||
7d4b6402 SA |
473 | if (info->flags & MEDIA_IOC_FL_GRAPH_MUTEX) |
474 | mutex_lock(&dev->graph_mutex); | |
475 | ||
bcd5081b | 476 | ret = info->fn(dev, karg); |
7d4b6402 SA |
477 | |
478 | if (info->flags & MEDIA_IOC_FL_GRAPH_MUTEX) | |
479 | mutex_unlock(&dev->graph_mutex); | |
140d8816 | 480 | |
bcd5081b SA |
481 | if (!ret && info->arg_to_user) |
482 | ret = info->arg_to_user(arg, karg, cmd); | |
483 | ||
484 | out_free: | |
485 | if (karg != __karg) | |
486 | kfree(karg); | |
487 | ||
140d8816 LP |
488 | return ret; |
489 | } | |
490 | ||
b0a1f2a8 SA |
491 | #ifdef CONFIG_COMPAT |
492 | ||
493 | struct media_links_enum32 { | |
494 | __u32 entity; | |
495 | compat_uptr_t pads; /* struct media_pad_desc * */ | |
496 | compat_uptr_t links; /* struct media_link_desc * */ | |
497 | __u32 reserved[4]; | |
498 | }; | |
499 | ||
500 | static long media_device_enum_links32(struct media_device *mdev, | |
501 | struct media_links_enum32 __user *ulinks) | |
502 | { | |
503 | struct media_links_enum links; | |
504 | compat_uptr_t pads_ptr, links_ptr; | |
505 | ||
506 | memset(&links, 0, sizeof(links)); | |
507 | ||
508 | if (get_user(links.entity, &ulinks->entity) | |
509 | || get_user(pads_ptr, &ulinks->pads) | |
510 | || get_user(links_ptr, &ulinks->links)) | |
511 | return -EFAULT; | |
512 | ||
513 | links.pads = compat_ptr(pads_ptr); | |
514 | links.links = compat_ptr(links_ptr); | |
515 | ||
bcd5081b | 516 | return media_device_enum_links(mdev, &links); |
b0a1f2a8 SA |
517 | } |
518 | ||
519 | #define MEDIA_IOC_ENUM_LINKS32 _IOWR('|', 0x02, struct media_links_enum32) | |
520 | ||
521 | static long media_device_compat_ioctl(struct file *filp, unsigned int cmd, | |
522 | unsigned long arg) | |
523 | { | |
524 | struct media_devnode *devnode = media_devnode_data(filp); | |
a087ce70 | 525 | struct media_device *dev = devnode->media_dev; |
b0a1f2a8 SA |
526 | long ret; |
527 | ||
528 | switch (cmd) { | |
b0a1f2a8 SA |
529 | case MEDIA_IOC_ENUM_LINKS32: |
530 | mutex_lock(&dev->graph_mutex); | |
531 | ret = media_device_enum_links32(dev, | |
532 | (struct media_links_enum32 __user *)arg); | |
533 | mutex_unlock(&dev->graph_mutex); | |
534 | break; | |
535 | ||
536 | default: | |
f7369627 | 537 | return media_device_ioctl(filp, cmd, arg); |
b0a1f2a8 SA |
538 | } |
539 | ||
540 | return ret; | |
541 | } | |
542 | #endif /* CONFIG_COMPAT */ | |
543 | ||
176fb0d1 LP |
544 | static const struct media_file_operations media_device_fops = { |
545 | .owner = THIS_MODULE, | |
140d8816 LP |
546 | .open = media_device_open, |
547 | .ioctl = media_device_ioctl, | |
b0a1f2a8 SA |
548 | #ifdef CONFIG_COMPAT |
549 | .compat_ioctl = media_device_compat_ioctl, | |
550 | #endif /* CONFIG_COMPAT */ | |
140d8816 | 551 | .release = media_device_close, |
176fb0d1 LP |
552 | }; |
553 | ||
554 | /* ----------------------------------------------------------------------------- | |
555 | * sysfs | |
556 | */ | |
557 | ||
558 | static ssize_t show_model(struct device *cd, | |
559 | struct device_attribute *attr, char *buf) | |
560 | { | |
a087ce70 MCC |
561 | struct media_devnode *devnode = to_media_devnode(cd); |
562 | struct media_device *mdev = devnode->media_dev; | |
176fb0d1 LP |
563 | |
564 | return sprintf(buf, "%.*s\n", (int)sizeof(mdev->model), mdev->model); | |
565 | } | |
566 | ||
567 | static DEVICE_ATTR(model, S_IRUGO, show_model, NULL); | |
568 | ||
569 | /* ----------------------------------------------------------------------------- | |
570 | * Registration/unregistration | |
571 | */ | |
572 | ||
552636be | 573 | static void media_device_release(struct media_devnode *devnode) |
176fb0d1 | 574 | { |
552636be | 575 | dev_dbg(devnode->parent, "Media device released\n"); |
176fb0d1 LP |
576 | } |
577 | ||
b2ed8af9 MCC |
578 | /** |
579 | * media_device_register_entity - Register an entity with a media device | |
580 | * @mdev: The media device | |
581 | * @entity: The entity | |
582 | */ | |
583 | int __must_check media_device_register_entity(struct media_device *mdev, | |
584 | struct media_entity *entity) | |
585 | { | |
afcbdb55 | 586 | struct media_entity_notify *notify, *next; |
b2ed8af9 | 587 | unsigned int i; |
ba0dd729 | 588 | int ret; |
b2ed8af9 MCC |
589 | |
590 | if (entity->function == MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN || | |
591 | entity->function == MEDIA_ENT_F_UNKNOWN) | |
592 | dev_warn(mdev->dev, | |
593 | "Entity type for entity %s was not initialized!\n", | |
594 | entity->name); | |
595 | ||
596 | /* Warn if we apparently re-register an entity */ | |
597 | WARN_ON(entity->graph_obj.mdev != NULL); | |
598 | entity->graph_obj.mdev = mdev; | |
599 | INIT_LIST_HEAD(&entity->links); | |
600 | entity->num_links = 0; | |
601 | entity->num_backlinks = 0; | |
602 | ||
5a2ab034 MW |
603 | ret = ida_alloc_min(&mdev->entity_internal_idx, 1, GFP_KERNEL); |
604 | if (ret < 0) | |
ba0dd729 | 605 | return ret; |
5a2ab034 | 606 | entity->internal_idx = ret; |
665faa97 | 607 | |
5a2ab034 | 608 | mutex_lock(&mdev->graph_mutex); |
665faa97 SA |
609 | mdev->entity_internal_idx_max = |
610 | max(mdev->entity_internal_idx_max, entity->internal_idx); | |
611 | ||
b2ed8af9 MCC |
612 | /* Initialize media_gobj embedded at the entity */ |
613 | media_gobj_create(mdev, MEDIA_GRAPH_ENTITY, &entity->graph_obj); | |
614 | ||
615 | /* Initialize objects at the pads */ | |
616 | for (i = 0; i < entity->num_pads; i++) | |
617 | media_gobj_create(mdev, MEDIA_GRAPH_PAD, | |
618 | &entity->pads[i].graph_obj); | |
619 | ||
afcbdb55 | 620 | /* invoke entity_notify callbacks */ |
10e81bcd SA |
621 | list_for_each_entry_safe(notify, next, &mdev->entity_notify, list) |
622 | notify->notify(entity, notify->notify_data); | |
afcbdb55 | 623 | |
0c426c47 SA |
624 | if (mdev->entity_internal_idx_max |
625 | >= mdev->pm_count_walk.ent_enum.idx_max) { | |
20b85227 | 626 | struct media_graph new = { .top = 0 }; |
0c426c47 SA |
627 | |
628 | /* | |
629 | * Initialise the new graph walk before cleaning up | |
630 | * the old one in order not to spoil the graph walk | |
631 | * object of the media device if graph walk init fails. | |
632 | */ | |
20b85227 | 633 | ret = media_graph_walk_init(&new, mdev); |
0c426c47 SA |
634 | if (ret) { |
635 | mutex_unlock(&mdev->graph_mutex); | |
636 | return ret; | |
637 | } | |
20b85227 | 638 | media_graph_walk_cleanup(&mdev->pm_count_walk); |
0c426c47 SA |
639 | mdev->pm_count_walk = new; |
640 | } | |
641 | mutex_unlock(&mdev->graph_mutex); | |
642 | ||
b2ed8af9 MCC |
643 | return 0; |
644 | } | |
645 | EXPORT_SYMBOL_GPL(media_device_register_entity); | |
646 | ||
821ed366 | 647 | static void __media_device_unregister_entity(struct media_entity *entity) |
b2ed8af9 MCC |
648 | { |
649 | struct media_device *mdev = entity->graph_obj.mdev; | |
650 | struct media_link *link, *tmp; | |
651 | struct media_interface *intf; | |
652 | unsigned int i; | |
653 | ||
5a2ab034 | 654 | ida_free(&mdev->entity_internal_idx, entity->internal_idx); |
665faa97 | 655 | |
b2ed8af9 MCC |
656 | /* Remove all interface links pointing to this entity */ |
657 | list_for_each_entry(intf, &mdev->interfaces, graph_obj.list) { | |
658 | list_for_each_entry_safe(link, tmp, &intf->links, list) { | |
659 | if (link->entity == entity) | |
660 | __media_remove_intf_link(link); | |
661 | } | |
662 | } | |
663 | ||
664 | /* Remove all data links that belong to this entity */ | |
665 | __media_entity_remove_links(entity); | |
666 | ||
667 | /* Remove all pads that belong to this entity */ | |
668 | for (i = 0; i < entity->num_pads; i++) | |
669 | media_gobj_destroy(&entity->pads[i].graph_obj); | |
670 | ||
671 | /* Remove the entity */ | |
672 | media_gobj_destroy(&entity->graph_obj); | |
673 | ||
afcbdb55 SK |
674 | /* invoke entity_notify callbacks to handle entity removal?? */ |
675 | ||
b2ed8af9 MCC |
676 | entity->graph_obj.mdev = NULL; |
677 | } | |
821ed366 MCC |
678 | |
679 | void media_device_unregister_entity(struct media_entity *entity) | |
680 | { | |
681 | struct media_device *mdev = entity->graph_obj.mdev; | |
682 | ||
683 | if (mdev == NULL) | |
684 | return; | |
685 | ||
e2c91d4d | 686 | mutex_lock(&mdev->graph_mutex); |
821ed366 | 687 | __media_device_unregister_entity(entity); |
e2c91d4d | 688 | mutex_unlock(&mdev->graph_mutex); |
821ed366 | 689 | } |
b2ed8af9 MCC |
690 | EXPORT_SYMBOL_GPL(media_device_unregister_entity); |
691 | ||
176fb0d1 | 692 | /** |
9832e155 | 693 | * media_device_init() - initialize a media device |
176fb0d1 LP |
694 | * @mdev: The media device |
695 | * | |
696 | * The caller is responsible for initializing the media device before | |
697 | * registration. The following fields must be set: | |
698 | * | |
699 | * - dev must point to the parent device | |
700 | * - model must be filled with the device model name | |
701 | */ | |
9832e155 | 702 | void media_device_init(struct media_device *mdev) |
176fb0d1 | 703 | { |
53e269c1 | 704 | INIT_LIST_HEAD(&mdev->entities); |
57cf79b7 | 705 | INIT_LIST_HEAD(&mdev->interfaces); |
9155d859 MCC |
706 | INIT_LIST_HEAD(&mdev->pads); |
707 | INIT_LIST_HEAD(&mdev->links); | |
afcbdb55 | 708 | INIT_LIST_HEAD(&mdev->entity_notify); |
10905d70 HV |
709 | |
710 | mutex_init(&mdev->req_queue_mutex); | |
503c3d82 | 711 | mutex_init(&mdev->graph_mutex); |
665faa97 | 712 | ida_init(&mdev->entity_internal_idx); |
53e269c1 | 713 | |
10905d70 HV |
714 | atomic_set(&mdev->request_id, 0); |
715 | ||
9832e155 JMC |
716 | dev_dbg(mdev->dev, "Media device initialized\n"); |
717 | } | |
718 | EXPORT_SYMBOL_GPL(media_device_init); | |
719 | ||
9832e155 JMC |
720 | void media_device_cleanup(struct media_device *mdev) |
721 | { | |
665faa97 SA |
722 | ida_destroy(&mdev->entity_internal_idx); |
723 | mdev->entity_internal_idx_max = 0; | |
20b85227 | 724 | media_graph_walk_cleanup(&mdev->pm_count_walk); |
9832e155 | 725 | mutex_destroy(&mdev->graph_mutex); |
10905d70 | 726 | mutex_destroy(&mdev->req_queue_mutex); |
9832e155 JMC |
727 | } |
728 | EXPORT_SYMBOL_GPL(media_device_cleanup); | |
729 | ||
9832e155 JMC |
730 | int __must_check __media_device_register(struct media_device *mdev, |
731 | struct module *owner) | |
732 | { | |
a087ce70 | 733 | struct media_devnode *devnode; |
9832e155 JMC |
734 | int ret; |
735 | ||
a087ce70 MCC |
736 | devnode = kzalloc(sizeof(*devnode), GFP_KERNEL); |
737 | if (!devnode) | |
738 | return -ENOMEM; | |
739 | ||
176fb0d1 | 740 | /* Register the device node. */ |
a087ce70 MCC |
741 | mdev->devnode = devnode; |
742 | devnode->fops = &media_device_fops; | |
743 | devnode->parent = mdev->dev; | |
744 | devnode->release = media_device_release; | |
8a950796 JMC |
745 | |
746 | /* Set version 0 to indicate user-space that the graph is static */ | |
747 | mdev->topology_version = 0; | |
748 | ||
a087ce70 MCC |
749 | ret = media_devnode_register(mdev, devnode, owner); |
750 | if (ret < 0) { | |
5b28dde5 | 751 | /* devnode free is handled in media_devnode_*() */ |
a087ce70 | 752 | mdev->devnode = NULL; |
176fb0d1 | 753 | return ret; |
a087ce70 | 754 | } |
176fb0d1 | 755 | |
a087ce70 | 756 | ret = device_create_file(&devnode->dev, &dev_attr_model); |
176fb0d1 | 757 | if (ret < 0) { |
5b28dde5 | 758 | /* devnode free is handled in media_devnode_*() */ |
a087ce70 | 759 | mdev->devnode = NULL; |
6f0dd24a | 760 | media_devnode_unregister_prepare(devnode); |
a087ce70 | 761 | media_devnode_unregister(devnode); |
176fb0d1 LP |
762 | return ret; |
763 | } | |
764 | ||
8f5a3188 MCC |
765 | dev_dbg(mdev->dev, "Media device registered\n"); |
766 | ||
176fb0d1 LP |
767 | return 0; |
768 | } | |
85de721c | 769 | EXPORT_SYMBOL_GPL(__media_device_register); |
176fb0d1 | 770 | |
afcbdb55 SK |
771 | int __must_check media_device_register_entity_notify(struct media_device *mdev, |
772 | struct media_entity_notify *nptr) | |
773 | { | |
e2c91d4d | 774 | mutex_lock(&mdev->graph_mutex); |
afcbdb55 | 775 | list_add_tail(&nptr->list, &mdev->entity_notify); |
e2c91d4d | 776 | mutex_unlock(&mdev->graph_mutex); |
afcbdb55 SK |
777 | return 0; |
778 | } | |
779 | EXPORT_SYMBOL_GPL(media_device_register_entity_notify); | |
780 | ||
781 | /* | |
782 | * Note: Should be called with mdev->lock held. | |
783 | */ | |
784 | static void __media_device_unregister_entity_notify(struct media_device *mdev, | |
785 | struct media_entity_notify *nptr) | |
786 | { | |
787 | list_del(&nptr->list); | |
788 | } | |
789 | ||
790 | void media_device_unregister_entity_notify(struct media_device *mdev, | |
791 | struct media_entity_notify *nptr) | |
792 | { | |
e2c91d4d | 793 | mutex_lock(&mdev->graph_mutex); |
afcbdb55 | 794 | __media_device_unregister_entity_notify(mdev, nptr); |
e2c91d4d | 795 | mutex_unlock(&mdev->graph_mutex); |
afcbdb55 SK |
796 | } |
797 | EXPORT_SYMBOL_GPL(media_device_unregister_entity_notify); | |
798 | ||
176fb0d1 LP |
799 | void media_device_unregister(struct media_device *mdev) |
800 | { | |
53e269c1 LP |
801 | struct media_entity *entity; |
802 | struct media_entity *next; | |
d47109fa | 803 | struct media_interface *intf, *tmp_intf; |
afcbdb55 | 804 | struct media_entity_notify *notify, *nextp; |
d47109fa | 805 | |
821ed366 MCC |
806 | if (mdev == NULL) |
807 | return; | |
808 | ||
e2c91d4d | 809 | mutex_lock(&mdev->graph_mutex); |
821ed366 | 810 | |
223d19c5 | 811 | /* Check if mdev was ever registered at all */ |
a087ce70 | 812 | if (!media_devnode_is_registered(mdev->devnode)) { |
e2c91d4d | 813 | mutex_unlock(&mdev->graph_mutex); |
223d19c5 | 814 | return; |
821ed366 | 815 | } |
223d19c5 | 816 | |
6f0dd24a SK |
817 | /* Clear the devnode register bit to avoid races with media dev open */ |
818 | media_devnode_unregister_prepare(mdev->devnode); | |
819 | ||
f50d5166 MCC |
820 | /* Remove all entities from the media device */ |
821 | list_for_each_entry_safe(entity, next, &mdev->entities, graph_obj.list) | |
821ed366 | 822 | __media_device_unregister_entity(entity); |
f50d5166 | 823 | |
afcbdb55 SK |
824 | /* Remove all entity_notify callbacks from the media device */ |
825 | list_for_each_entry_safe(notify, nextp, &mdev->entity_notify, list) | |
826 | __media_device_unregister_entity_notify(mdev, notify); | |
827 | ||
d47109fa | 828 | /* Remove all interfaces from the media device */ |
d47109fa MCC |
829 | list_for_each_entry_safe(intf, tmp_intf, &mdev->interfaces, |
830 | graph_obj.list) { | |
e7cd17a2 MK |
831 | /* |
832 | * Unlink the interface, but don't free it here; the | |
833 | * module which created it is responsible for freeing | |
834 | * it | |
835 | */ | |
d47109fa | 836 | __media_remove_intf_links(intf); |
c350ef83 | 837 | media_gobj_destroy(&intf->graph_obj); |
d47109fa | 838 | } |
821ed366 | 839 | |
e2c91d4d | 840 | mutex_unlock(&mdev->graph_mutex); |
53e269c1 | 841 | |
a087ce70 MCC |
842 | dev_dbg(mdev->dev, "Media device unregistered\n"); |
843 | ||
6f0dd24a SK |
844 | device_remove_file(&mdev->devnode->dev, &dev_attr_model); |
845 | media_devnode_unregister(mdev->devnode); | |
846 | /* devnode free is handled in media_devnode_*() */ | |
847 | mdev->devnode = NULL; | |
176fb0d1 LP |
848 | } |
849 | EXPORT_SYMBOL_GPL(media_device_unregister); | |
53e269c1 | 850 | |
b34ecd5a | 851 | #if IS_ENABLED(CONFIG_PCI) |
6cf5dad1 MCC |
852 | void media_device_pci_init(struct media_device *mdev, |
853 | struct pci_dev *pci_dev, | |
854 | const char *name) | |
41b44e35 | 855 | { |
41b44e35 MCC |
856 | mdev->dev = &pci_dev->dev; |
857 | ||
858 | if (name) | |
c0decac1 | 859 | strscpy(mdev->model, name, sizeof(mdev->model)); |
41b44e35 | 860 | else |
c0decac1 | 861 | strscpy(mdev->model, pci_name(pci_dev), sizeof(mdev->model)); |
41b44e35 MCC |
862 | |
863 | sprintf(mdev->bus_info, "PCI:%s", pci_name(pci_dev)); | |
864 | ||
865 | mdev->hw_revision = (pci_dev->subsystem_vendor << 16) | |
866 | | pci_dev->subsystem_device; | |
867 | ||
41b44e35 | 868 | media_device_init(mdev); |
41b44e35 MCC |
869 | } |
870 | EXPORT_SYMBOL_GPL(media_device_pci_init); | |
b34ecd5a | 871 | #endif |
41b44e35 | 872 | |
b34ecd5a | 873 | #if IS_ENABLED(CONFIG_USB) |
6cf5dad1 MCC |
874 | void __media_device_usb_init(struct media_device *mdev, |
875 | struct usb_device *udev, | |
876 | const char *board_name, | |
877 | const char *driver_name) | |
41b44e35 | 878 | { |
41b44e35 MCC |
879 | mdev->dev = &udev->dev; |
880 | ||
881 | if (driver_name) | |
c0decac1 | 882 | strscpy(mdev->driver_name, driver_name, |
41b44e35 MCC |
883 | sizeof(mdev->driver_name)); |
884 | ||
885 | if (board_name) | |
c0decac1 | 886 | strscpy(mdev->model, board_name, sizeof(mdev->model)); |
41b44e35 | 887 | else if (udev->product) |
c0decac1 | 888 | strscpy(mdev->model, udev->product, sizeof(mdev->model)); |
41b44e35 | 889 | else |
c0decac1 | 890 | strscpy(mdev->model, "unknown model", sizeof(mdev->model)); |
41b44e35 | 891 | if (udev->serial) |
c0decac1 | 892 | strscpy(mdev->serial, udev->serial, sizeof(mdev->serial)); |
41b44e35 MCC |
893 | usb_make_path(udev, mdev->bus_info, sizeof(mdev->bus_info)); |
894 | mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice); | |
41b44e35 MCC |
895 | |
896 | media_device_init(mdev); | |
41b44e35 MCC |
897 | } |
898 | EXPORT_SYMBOL_GPL(__media_device_usb_init); | |
b34ecd5a | 899 | #endif |
41b44e35 MCC |
900 | |
901 | ||
e576d60b | 902 | #endif /* CONFIG_MEDIA_CONTROLLER */ |