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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 | ||
daa36370 | 57 | static long media_device_get_info(struct media_device *dev, void *arg) |
140d8816 | 58 | { |
daa36370 ST |
59 | struct media_device_info *info = arg; |
60 | ||
bcd5081b | 61 | memset(info, 0, sizeof(*info)); |
140d8816 | 62 | |
bb07bd6b | 63 | if (dev->driver_name[0]) |
bcd5081b | 64 | strlcpy(info->driver, dev->driver_name, sizeof(info->driver)); |
bb07bd6b | 65 | else |
bcd5081b SA |
66 | strlcpy(info->driver, dev->dev->driver->name, |
67 | sizeof(info->driver)); | |
bb07bd6b | 68 | |
bcd5081b SA |
69 | strlcpy(info->model, dev->model, sizeof(info->model)); |
70 | strlcpy(info->serial, dev->serial, sizeof(info->serial)); | |
71 | strlcpy(info->bus_info, dev->bus_info, sizeof(info->bus_info)); | |
140d8816 | 72 | |
6c2c188f HV |
73 | info->media_version = LINUX_VERSION_CODE; |
74 | info->driver_version = info->media_version; | |
bcd5081b | 75 | info->hw_revision = dev->hw_revision; |
140d8816 | 76 | |
b17d3945 | 77 | return 0; |
140d8816 LP |
78 | } |
79 | ||
1651333b LP |
80 | static struct media_entity *find_entity(struct media_device *mdev, u32 id) |
81 | { | |
82 | struct media_entity *entity; | |
83 | int next = id & MEDIA_ENT_ID_FLAG_NEXT; | |
84 | ||
85 | id &= ~MEDIA_ENT_ID_FLAG_NEXT; | |
86 | ||
1651333b | 87 | media_device_for_each_entity(entity, mdev) { |
fa762394 MCC |
88 | if (((media_entity_id(entity) == id) && !next) || |
89 | ((media_entity_id(entity) > id) && next)) { | |
1651333b LP |
90 | return entity; |
91 | } | |
92 | } | |
93 | ||
1651333b LP |
94 | return NULL; |
95 | } | |
96 | ||
daa36370 | 97 | static long media_device_enum_entities(struct media_device *mdev, void *arg) |
1651333b | 98 | { |
daa36370 | 99 | struct media_entity_desc *entd = arg; |
1651333b | 100 | struct media_entity *ent; |
1651333b | 101 | |
bcd5081b | 102 | ent = find_entity(mdev, entd->id); |
1651333b LP |
103 | if (ent == NULL) |
104 | return -EINVAL; | |
105 | ||
bcd5081b SA |
106 | memset(entd, 0, sizeof(*entd)); |
107 | ||
108 | entd->id = media_entity_id(ent); | |
de8eae36 | 109 | if (ent->name) |
bcd5081b SA |
110 | strlcpy(entd->name, ent->name, sizeof(entd->name)); |
111 | entd->type = ent->function; | |
112 | entd->revision = 0; /* Unused */ | |
113 | entd->flags = ent->flags; | |
114 | entd->group_id = 0; /* Unused */ | |
115 | entd->pads = ent->num_pads; | |
116 | entd->links = ent->num_links - ent->num_backlinks; | |
b2cd2744 MCC |
117 | |
118 | /* | |
119 | * Workaround for a bug at media-ctl <= v1.10 that makes it to | |
120 | * do the wrong thing if the entity function doesn't belong to | |
121 | * either MEDIA_ENT_F_OLD_BASE or MEDIA_ENT_F_OLD_SUBDEV_BASE | |
122 | * Ranges. | |
123 | * | |
124 | * Non-subdevices are expected to be at the MEDIA_ENT_F_OLD_BASE, | |
125 | * or, otherwise, will be silently ignored by media-ctl when | |
126 | * printing the graphviz diagram. So, map them into the devnode | |
127 | * old range. | |
128 | */ | |
129 | if (ent->function < MEDIA_ENT_F_OLD_BASE || | |
98d85f3c | 130 | ent->function > MEDIA_ENT_F_TUNER) { |
b2cd2744 | 131 | if (is_media_entity_v4l2_subdev(ent)) |
bcd5081b | 132 | entd->type = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN; |
b2cd2744 | 133 | else if (ent->function != MEDIA_ENT_F_IO_V4L) |
bcd5081b | 134 | entd->type = MEDIA_ENT_T_DEVNODE_UNKNOWN; |
b2cd2744 MCC |
135 | } |
136 | ||
bcd5081b SA |
137 | memcpy(&entd->raw, &ent->info, sizeof(ent->info)); |
138 | ||
1651333b LP |
139 | return 0; |
140 | } | |
141 | ||
142 | static void media_device_kpad_to_upad(const struct media_pad *kpad, | |
143 | struct media_pad_desc *upad) | |
144 | { | |
fa762394 | 145 | upad->entity = media_entity_id(kpad->entity); |
1651333b LP |
146 | upad->index = kpad->index; |
147 | upad->flags = kpad->flags; | |
148 | } | |
149 | ||
daa36370 | 150 | static long media_device_enum_links(struct media_device *mdev, void *arg) |
1651333b | 151 | { |
daa36370 | 152 | struct media_links_enum *links = arg; |
1651333b | 153 | struct media_entity *entity; |
1651333b | 154 | |
b0a1f2a8 | 155 | entity = find_entity(mdev, links->entity); |
1651333b LP |
156 | if (entity == NULL) |
157 | return -EINVAL; | |
158 | ||
b0a1f2a8 | 159 | if (links->pads) { |
1651333b LP |
160 | unsigned int p; |
161 | ||
162 | for (p = 0; p < entity->num_pads; p++) { | |
163 | struct media_pad_desc pad; | |
c88e739b DC |
164 | |
165 | memset(&pad, 0, sizeof(pad)); | |
1651333b | 166 | media_device_kpad_to_upad(&entity->pads[p], &pad); |
b0a1f2a8 | 167 | if (copy_to_user(&links->pads[p], &pad, sizeof(pad))) |
1651333b LP |
168 | return -EFAULT; |
169 | } | |
170 | } | |
171 | ||
b0a1f2a8 | 172 | if (links->links) { |
b83e2508 MCC |
173 | struct media_link *link; |
174 | struct media_link_desc __user *ulink_desc = links->links; | |
1651333b | 175 | |
b83e2508 MCC |
176 | list_for_each_entry(link, &entity->links, list) { |
177 | struct media_link_desc klink_desc; | |
1651333b LP |
178 | |
179 | /* Ignore backlinks. */ | |
b83e2508 | 180 | if (link->source->entity != entity) |
1651333b | 181 | continue; |
b83e2508 MCC |
182 | memset(&klink_desc, 0, sizeof(klink_desc)); |
183 | media_device_kpad_to_upad(link->source, | |
184 | &klink_desc.source); | |
185 | media_device_kpad_to_upad(link->sink, | |
186 | &klink_desc.sink); | |
187 | klink_desc.flags = link->flags; | |
188 | if (copy_to_user(ulink_desc, &klink_desc, | |
189 | sizeof(*ulink_desc))) | |
1651333b | 190 | return -EFAULT; |
b83e2508 | 191 | ulink_desc++; |
1651333b LP |
192 | } |
193 | } | |
fcab7573 | 194 | memset(links->reserved, 0, sizeof(links->reserved)); |
b0a1f2a8 SA |
195 | |
196 | return 0; | |
197 | } | |
198 | ||
daa36370 | 199 | static long media_device_setup_link(struct media_device *mdev, void *arg) |
97548ed4 | 200 | { |
daa36370 | 201 | struct media_link_desc *linkd = arg; |
97548ed4 | 202 | struct media_link *link = NULL; |
97548ed4 LP |
203 | struct media_entity *source; |
204 | struct media_entity *sink; | |
97548ed4 LP |
205 | |
206 | /* Find the source and sink entities and link. | |
207 | */ | |
bcd5081b SA |
208 | source = find_entity(mdev, linkd->source.entity); |
209 | sink = find_entity(mdev, linkd->sink.entity); | |
97548ed4 LP |
210 | |
211 | if (source == NULL || sink == NULL) | |
212 | return -EINVAL; | |
213 | ||
bcd5081b SA |
214 | if (linkd->source.index >= source->num_pads || |
215 | linkd->sink.index >= sink->num_pads) | |
97548ed4 LP |
216 | return -EINVAL; |
217 | ||
bcd5081b SA |
218 | link = media_entity_find_link(&source->pads[linkd->source.index], |
219 | &sink->pads[linkd->sink.index]); | |
97548ed4 LP |
220 | if (link == NULL) |
221 | return -EINVAL; | |
222 | ||
fcab7573 HV |
223 | memset(linkd->reserved, 0, sizeof(linkd->reserved)); |
224 | ||
97548ed4 | 225 | /* Setup the link on both entities. */ |
bcd5081b | 226 | return __media_entity_setup_link(link, linkd->flags); |
97548ed4 LP |
227 | } |
228 | ||
daa36370 | 229 | static long media_device_get_topology(struct media_device *mdev, void *arg) |
8309f47c | 230 | { |
daa36370 | 231 | struct media_v2_topology *topo = arg; |
8309f47c MCC |
232 | struct media_entity *entity; |
233 | struct media_interface *intf; | |
234 | struct media_pad *pad; | |
235 | struct media_link *link; | |
d37410c2 SA |
236 | struct media_v2_entity kentity, __user *uentity; |
237 | struct media_v2_interface kintf, __user *uintf; | |
238 | struct media_v2_pad kpad, __user *upad; | |
239 | struct media_v2_link klink, __user *ulink; | |
9033b1a4 MCC |
240 | unsigned int i; |
241 | int ret = 0; | |
8309f47c MCC |
242 | |
243 | topo->topology_version = mdev->topology_version; | |
244 | ||
245 | /* Get entities and number of entities */ | |
246 | i = 0; | |
b3b7a9f1 | 247 | uentity = media_get_uptr(topo->ptr_entities); |
8309f47c MCC |
248 | media_device_for_each_entity(entity, mdev) { |
249 | i++; | |
b3b7a9f1 | 250 | if (ret || !uentity) |
8309f47c MCC |
251 | continue; |
252 | ||
253 | if (i > topo->num_entities) { | |
254 | ret = -ENOSPC; | |
255 | continue; | |
256 | } | |
257 | ||
258 | /* Copy fields to userspace struct if not error */ | |
b3b7a9f1 MCC |
259 | memset(&kentity, 0, sizeof(kentity)); |
260 | kentity.id = entity->graph_obj.id; | |
261 | kentity.function = entity->function; | |
81b9de43 | 262 | strlcpy(kentity.name, entity->name, |
b3b7a9f1 | 263 | sizeof(kentity.name)); |
8309f47c | 264 | |
b3b7a9f1 | 265 | if (copy_to_user(uentity, &kentity, sizeof(kentity))) |
8309f47c | 266 | ret = -EFAULT; |
b3b7a9f1 | 267 | uentity++; |
8309f47c MCC |
268 | } |
269 | topo->num_entities = i; | |
baa9e910 | 270 | topo->reserved1 = 0; |
8309f47c MCC |
271 | |
272 | /* Get interfaces and number of interfaces */ | |
273 | i = 0; | |
b3b7a9f1 | 274 | uintf = media_get_uptr(topo->ptr_interfaces); |
8309f47c MCC |
275 | media_device_for_each_intf(intf, mdev) { |
276 | i++; | |
b3b7a9f1 | 277 | if (ret || !uintf) |
8309f47c MCC |
278 | continue; |
279 | ||
280 | if (i > topo->num_interfaces) { | |
281 | ret = -ENOSPC; | |
282 | continue; | |
283 | } | |
284 | ||
b3b7a9f1 | 285 | memset(&kintf, 0, sizeof(kintf)); |
8309f47c MCC |
286 | |
287 | /* Copy intf fields to userspace struct */ | |
b3b7a9f1 MCC |
288 | kintf.id = intf->graph_obj.id; |
289 | kintf.intf_type = intf->type; | |
290 | kintf.flags = intf->flags; | |
8309f47c MCC |
291 | |
292 | if (media_type(&intf->graph_obj) == MEDIA_GRAPH_INTF_DEVNODE) { | |
293 | struct media_intf_devnode *devnode; | |
294 | ||
295 | devnode = intf_to_devnode(intf); | |
296 | ||
b3b7a9f1 MCC |
297 | kintf.devnode.major = devnode->major; |
298 | kintf.devnode.minor = devnode->minor; | |
8309f47c MCC |
299 | } |
300 | ||
b3b7a9f1 | 301 | if (copy_to_user(uintf, &kintf, sizeof(kintf))) |
8309f47c | 302 | ret = -EFAULT; |
b3b7a9f1 | 303 | uintf++; |
8309f47c MCC |
304 | } |
305 | topo->num_interfaces = i; | |
baa9e910 | 306 | topo->reserved2 = 0; |
8309f47c MCC |
307 | |
308 | /* Get pads and number of pads */ | |
309 | i = 0; | |
b3b7a9f1 | 310 | upad = media_get_uptr(topo->ptr_pads); |
8309f47c MCC |
311 | media_device_for_each_pad(pad, mdev) { |
312 | i++; | |
b3b7a9f1 | 313 | if (ret || !upad) |
8309f47c MCC |
314 | continue; |
315 | ||
316 | if (i > topo->num_pads) { | |
317 | ret = -ENOSPC; | |
318 | continue; | |
319 | } | |
320 | ||
b3b7a9f1 | 321 | memset(&kpad, 0, sizeof(kpad)); |
8309f47c MCC |
322 | |
323 | /* Copy pad fields to userspace struct */ | |
b3b7a9f1 MCC |
324 | kpad.id = pad->graph_obj.id; |
325 | kpad.entity_id = pad->entity->graph_obj.id; | |
326 | kpad.flags = pad->flags; | |
8309f47c | 327 | |
b3b7a9f1 | 328 | if (copy_to_user(upad, &kpad, sizeof(kpad))) |
8309f47c | 329 | ret = -EFAULT; |
b3b7a9f1 | 330 | upad++; |
8309f47c MCC |
331 | } |
332 | topo->num_pads = i; | |
baa9e910 | 333 | topo->reserved3 = 0; |
8309f47c MCC |
334 | |
335 | /* Get links and number of links */ | |
336 | i = 0; | |
b3b7a9f1 | 337 | ulink = media_get_uptr(topo->ptr_links); |
8309f47c | 338 | media_device_for_each_link(link, mdev) { |
39d1ebc6 MCC |
339 | if (link->is_backlink) |
340 | continue; | |
341 | ||
8309f47c MCC |
342 | i++; |
343 | ||
b3b7a9f1 | 344 | if (ret || !ulink) |
8309f47c MCC |
345 | continue; |
346 | ||
347 | if (i > topo->num_links) { | |
348 | ret = -ENOSPC; | |
349 | continue; | |
350 | } | |
351 | ||
b3b7a9f1 | 352 | memset(&klink, 0, sizeof(klink)); |
8309f47c MCC |
353 | |
354 | /* Copy link fields to userspace struct */ | |
b3b7a9f1 MCC |
355 | klink.id = link->graph_obj.id; |
356 | klink.source_id = link->gobj0->id; | |
357 | klink.sink_id = link->gobj1->id; | |
358 | klink.flags = link->flags; | |
8309f47c | 359 | |
b3b7a9f1 | 360 | if (copy_to_user(ulink, &klink, sizeof(klink))) |
8309f47c | 361 | ret = -EFAULT; |
b3b7a9f1 | 362 | ulink++; |
8309f47c MCC |
363 | } |
364 | topo->num_links = i; | |
baa9e910 | 365 | topo->reserved4 = 0; |
8309f47c MCC |
366 | |
367 | return ret; | |
368 | } | |
369 | ||
bcd5081b | 370 | static long copy_arg_from_user(void *karg, void __user *uarg, unsigned int cmd) |
8309f47c | 371 | { |
bcd5081b SA |
372 | /* All media IOCTLs are _IOWR() */ |
373 | if (copy_from_user(karg, uarg, _IOC_SIZE(cmd))) | |
a5c82e56 | 374 | return -EFAULT; |
8309f47c | 375 | |
bcd5081b SA |
376 | return 0; |
377 | } | |
8309f47c | 378 | |
bcd5081b SA |
379 | static long copy_arg_to_user(void __user *uarg, void *karg, unsigned int cmd) |
380 | { | |
381 | /* All media IOCTLs are _IOWR() */ | |
382 | if (copy_to_user(uarg, karg, _IOC_SIZE(cmd))) | |
a5c82e56 | 383 | return -EFAULT; |
8309f47c | 384 | |
a5c82e56 | 385 | return 0; |
8309f47c MCC |
386 | } |
387 | ||
7d4b6402 SA |
388 | /* Do acquire the graph mutex */ |
389 | #define MEDIA_IOC_FL_GRAPH_MUTEX BIT(0) | |
390 | ||
391 | #define MEDIA_IOC_ARG(__cmd, func, fl, from_user, to_user) \ | |
392 | [_IOC_NR(MEDIA_IOC_##__cmd)] = { \ | |
393 | .cmd = MEDIA_IOC_##__cmd, \ | |
bcd5081b | 394 | .fn = (long (*)(struct media_device *, void *))func, \ |
7d4b6402 SA |
395 | .flags = fl, \ |
396 | .arg_from_user = from_user, \ | |
397 | .arg_to_user = to_user, \ | |
6975264c | 398 | } |
cf439d5f | 399 | |
7d4b6402 SA |
400 | #define MEDIA_IOC(__cmd, func, fl) \ |
401 | MEDIA_IOC_ARG(__cmd, func, fl, copy_arg_from_user, copy_arg_to_user) | |
bcd5081b | 402 | |
cf439d5f SA |
403 | /* the table is indexed by _IOC_NR(cmd) */ |
404 | struct media_ioctl_info { | |
405 | unsigned int cmd; | |
7d4b6402 | 406 | unsigned short flags; |
bcd5081b SA |
407 | long (*fn)(struct media_device *dev, void *arg); |
408 | long (*arg_from_user)(void *karg, void __user *uarg, unsigned int cmd); | |
409 | long (*arg_to_user)(void __user *uarg, void *karg, unsigned int cmd); | |
cf439d5f SA |
410 | }; |
411 | ||
412 | static const struct media_ioctl_info ioctl_info[] = { | |
7d4b6402 SA |
413 | MEDIA_IOC(DEVICE_INFO, media_device_get_info, MEDIA_IOC_FL_GRAPH_MUTEX), |
414 | MEDIA_IOC(ENUM_ENTITIES, media_device_enum_entities, MEDIA_IOC_FL_GRAPH_MUTEX), | |
415 | MEDIA_IOC(ENUM_LINKS, media_device_enum_links, MEDIA_IOC_FL_GRAPH_MUTEX), | |
416 | MEDIA_IOC(SETUP_LINK, media_device_setup_link, MEDIA_IOC_FL_GRAPH_MUTEX), | |
417 | MEDIA_IOC(G_TOPOLOGY, media_device_get_topology, MEDIA_IOC_FL_GRAPH_MUTEX), | |
cf439d5f SA |
418 | }; |
419 | ||
140d8816 | 420 | static long media_device_ioctl(struct file *filp, unsigned int cmd, |
bcd5081b | 421 | unsigned long __arg) |
140d8816 LP |
422 | { |
423 | struct media_devnode *devnode = media_devnode_data(filp); | |
a087ce70 | 424 | struct media_device *dev = devnode->media_dev; |
6975264c | 425 | const struct media_ioctl_info *info; |
bcd5081b SA |
426 | void __user *arg = (void __user *)__arg; |
427 | char __karg[256], *karg = __karg; | |
140d8816 LP |
428 | long ret; |
429 | ||
cf439d5f SA |
430 | if (_IOC_NR(cmd) >= ARRAY_SIZE(ioctl_info) |
431 | || ioctl_info[_IOC_NR(cmd)].cmd != cmd) | |
432 | return -ENOIOCTLCMD; | |
433 | ||
6975264c SA |
434 | info = &ioctl_info[_IOC_NR(cmd)]; |
435 | ||
bcd5081b SA |
436 | if (_IOC_SIZE(info->cmd) > sizeof(__karg)) { |
437 | karg = kmalloc(_IOC_SIZE(info->cmd), GFP_KERNEL); | |
438 | if (!karg) | |
439 | return -ENOMEM; | |
440 | } | |
441 | ||
442 | if (info->arg_from_user) { | |
443 | ret = info->arg_from_user(karg, arg, cmd); | |
444 | if (ret) | |
445 | goto out_free; | |
446 | } | |
447 | ||
7d4b6402 SA |
448 | if (info->flags & MEDIA_IOC_FL_GRAPH_MUTEX) |
449 | mutex_lock(&dev->graph_mutex); | |
450 | ||
bcd5081b | 451 | ret = info->fn(dev, karg); |
7d4b6402 SA |
452 | |
453 | if (info->flags & MEDIA_IOC_FL_GRAPH_MUTEX) | |
454 | mutex_unlock(&dev->graph_mutex); | |
140d8816 | 455 | |
bcd5081b SA |
456 | if (!ret && info->arg_to_user) |
457 | ret = info->arg_to_user(arg, karg, cmd); | |
458 | ||
459 | out_free: | |
460 | if (karg != __karg) | |
461 | kfree(karg); | |
462 | ||
140d8816 LP |
463 | return ret; |
464 | } | |
465 | ||
b0a1f2a8 SA |
466 | #ifdef CONFIG_COMPAT |
467 | ||
468 | struct media_links_enum32 { | |
469 | __u32 entity; | |
470 | compat_uptr_t pads; /* struct media_pad_desc * */ | |
471 | compat_uptr_t links; /* struct media_link_desc * */ | |
472 | __u32 reserved[4]; | |
473 | }; | |
474 | ||
475 | static long media_device_enum_links32(struct media_device *mdev, | |
476 | struct media_links_enum32 __user *ulinks) | |
477 | { | |
478 | struct media_links_enum links; | |
479 | compat_uptr_t pads_ptr, links_ptr; | |
480 | ||
481 | memset(&links, 0, sizeof(links)); | |
482 | ||
483 | if (get_user(links.entity, &ulinks->entity) | |
484 | || get_user(pads_ptr, &ulinks->pads) | |
485 | || get_user(links_ptr, &ulinks->links)) | |
486 | return -EFAULT; | |
487 | ||
488 | links.pads = compat_ptr(pads_ptr); | |
489 | links.links = compat_ptr(links_ptr); | |
490 | ||
bcd5081b | 491 | return media_device_enum_links(mdev, &links); |
b0a1f2a8 SA |
492 | } |
493 | ||
494 | #define MEDIA_IOC_ENUM_LINKS32 _IOWR('|', 0x02, struct media_links_enum32) | |
495 | ||
496 | static long media_device_compat_ioctl(struct file *filp, unsigned int cmd, | |
497 | unsigned long arg) | |
498 | { | |
499 | struct media_devnode *devnode = media_devnode_data(filp); | |
a087ce70 | 500 | struct media_device *dev = devnode->media_dev; |
b0a1f2a8 SA |
501 | long ret; |
502 | ||
503 | switch (cmd) { | |
b0a1f2a8 SA |
504 | case MEDIA_IOC_ENUM_LINKS32: |
505 | mutex_lock(&dev->graph_mutex); | |
506 | ret = media_device_enum_links32(dev, | |
507 | (struct media_links_enum32 __user *)arg); | |
508 | mutex_unlock(&dev->graph_mutex); | |
509 | break; | |
510 | ||
511 | default: | |
f7369627 | 512 | return media_device_ioctl(filp, cmd, arg); |
b0a1f2a8 SA |
513 | } |
514 | ||
515 | return ret; | |
516 | } | |
517 | #endif /* CONFIG_COMPAT */ | |
518 | ||
176fb0d1 LP |
519 | static const struct media_file_operations media_device_fops = { |
520 | .owner = THIS_MODULE, | |
140d8816 LP |
521 | .open = media_device_open, |
522 | .ioctl = media_device_ioctl, | |
b0a1f2a8 SA |
523 | #ifdef CONFIG_COMPAT |
524 | .compat_ioctl = media_device_compat_ioctl, | |
525 | #endif /* CONFIG_COMPAT */ | |
140d8816 | 526 | .release = media_device_close, |
176fb0d1 LP |
527 | }; |
528 | ||
529 | /* ----------------------------------------------------------------------------- | |
530 | * sysfs | |
531 | */ | |
532 | ||
533 | static ssize_t show_model(struct device *cd, | |
534 | struct device_attribute *attr, char *buf) | |
535 | { | |
a087ce70 MCC |
536 | struct media_devnode *devnode = to_media_devnode(cd); |
537 | struct media_device *mdev = devnode->media_dev; | |
176fb0d1 LP |
538 | |
539 | return sprintf(buf, "%.*s\n", (int)sizeof(mdev->model), mdev->model); | |
540 | } | |
541 | ||
542 | static DEVICE_ATTR(model, S_IRUGO, show_model, NULL); | |
543 | ||
544 | /* ----------------------------------------------------------------------------- | |
545 | * Registration/unregistration | |
546 | */ | |
547 | ||
552636be | 548 | static void media_device_release(struct media_devnode *devnode) |
176fb0d1 | 549 | { |
552636be | 550 | dev_dbg(devnode->parent, "Media device released\n"); |
176fb0d1 LP |
551 | } |
552 | ||
b2ed8af9 MCC |
553 | /** |
554 | * media_device_register_entity - Register an entity with a media device | |
555 | * @mdev: The media device | |
556 | * @entity: The entity | |
557 | */ | |
558 | int __must_check media_device_register_entity(struct media_device *mdev, | |
559 | struct media_entity *entity) | |
560 | { | |
afcbdb55 | 561 | struct media_entity_notify *notify, *next; |
b2ed8af9 | 562 | unsigned int i; |
ba0dd729 | 563 | int ret; |
b2ed8af9 MCC |
564 | |
565 | if (entity->function == MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN || | |
566 | entity->function == MEDIA_ENT_F_UNKNOWN) | |
567 | dev_warn(mdev->dev, | |
568 | "Entity type for entity %s was not initialized!\n", | |
569 | entity->name); | |
570 | ||
571 | /* Warn if we apparently re-register an entity */ | |
572 | WARN_ON(entity->graph_obj.mdev != NULL); | |
573 | entity->graph_obj.mdev = mdev; | |
574 | INIT_LIST_HEAD(&entity->links); | |
575 | entity->num_links = 0; | |
576 | entity->num_backlinks = 0; | |
577 | ||
ba0dd729 MCC |
578 | if (!ida_pre_get(&mdev->entity_internal_idx, GFP_KERNEL)) |
579 | return -ENOMEM; | |
580 | ||
e2c91d4d | 581 | mutex_lock(&mdev->graph_mutex); |
665faa97 | 582 | |
ba0dd729 MCC |
583 | ret = ida_get_new_above(&mdev->entity_internal_idx, 1, |
584 | &entity->internal_idx); | |
585 | if (ret < 0) { | |
e2c91d4d | 586 | mutex_unlock(&mdev->graph_mutex); |
ba0dd729 | 587 | return ret; |
665faa97 SA |
588 | } |
589 | ||
590 | mdev->entity_internal_idx_max = | |
591 | max(mdev->entity_internal_idx_max, entity->internal_idx); | |
592 | ||
b2ed8af9 MCC |
593 | /* Initialize media_gobj embedded at the entity */ |
594 | media_gobj_create(mdev, MEDIA_GRAPH_ENTITY, &entity->graph_obj); | |
595 | ||
596 | /* Initialize objects at the pads */ | |
597 | for (i = 0; i < entity->num_pads; i++) | |
598 | media_gobj_create(mdev, MEDIA_GRAPH_PAD, | |
599 | &entity->pads[i].graph_obj); | |
600 | ||
afcbdb55 | 601 | /* invoke entity_notify callbacks */ |
10e81bcd SA |
602 | list_for_each_entry_safe(notify, next, &mdev->entity_notify, list) |
603 | notify->notify(entity, notify->notify_data); | |
afcbdb55 | 604 | |
0c426c47 SA |
605 | if (mdev->entity_internal_idx_max |
606 | >= mdev->pm_count_walk.ent_enum.idx_max) { | |
20b85227 | 607 | struct media_graph new = { .top = 0 }; |
0c426c47 SA |
608 | |
609 | /* | |
610 | * Initialise the new graph walk before cleaning up | |
611 | * the old one in order not to spoil the graph walk | |
612 | * object of the media device if graph walk init fails. | |
613 | */ | |
20b85227 | 614 | ret = media_graph_walk_init(&new, mdev); |
0c426c47 SA |
615 | if (ret) { |
616 | mutex_unlock(&mdev->graph_mutex); | |
617 | return ret; | |
618 | } | |
20b85227 | 619 | media_graph_walk_cleanup(&mdev->pm_count_walk); |
0c426c47 SA |
620 | mdev->pm_count_walk = new; |
621 | } | |
622 | mutex_unlock(&mdev->graph_mutex); | |
623 | ||
b2ed8af9 MCC |
624 | return 0; |
625 | } | |
626 | EXPORT_SYMBOL_GPL(media_device_register_entity); | |
627 | ||
821ed366 | 628 | static void __media_device_unregister_entity(struct media_entity *entity) |
b2ed8af9 MCC |
629 | { |
630 | struct media_device *mdev = entity->graph_obj.mdev; | |
631 | struct media_link *link, *tmp; | |
632 | struct media_interface *intf; | |
633 | unsigned int i; | |
634 | ||
665faa97 SA |
635 | ida_simple_remove(&mdev->entity_internal_idx, entity->internal_idx); |
636 | ||
b2ed8af9 MCC |
637 | /* Remove all interface links pointing to this entity */ |
638 | list_for_each_entry(intf, &mdev->interfaces, graph_obj.list) { | |
639 | list_for_each_entry_safe(link, tmp, &intf->links, list) { | |
640 | if (link->entity == entity) | |
641 | __media_remove_intf_link(link); | |
642 | } | |
643 | } | |
644 | ||
645 | /* Remove all data links that belong to this entity */ | |
646 | __media_entity_remove_links(entity); | |
647 | ||
648 | /* Remove all pads that belong to this entity */ | |
649 | for (i = 0; i < entity->num_pads; i++) | |
650 | media_gobj_destroy(&entity->pads[i].graph_obj); | |
651 | ||
652 | /* Remove the entity */ | |
653 | media_gobj_destroy(&entity->graph_obj); | |
654 | ||
afcbdb55 SK |
655 | /* invoke entity_notify callbacks to handle entity removal?? */ |
656 | ||
b2ed8af9 MCC |
657 | entity->graph_obj.mdev = NULL; |
658 | } | |
821ed366 MCC |
659 | |
660 | void media_device_unregister_entity(struct media_entity *entity) | |
661 | { | |
662 | struct media_device *mdev = entity->graph_obj.mdev; | |
663 | ||
664 | if (mdev == NULL) | |
665 | return; | |
666 | ||
e2c91d4d | 667 | mutex_lock(&mdev->graph_mutex); |
821ed366 | 668 | __media_device_unregister_entity(entity); |
e2c91d4d | 669 | mutex_unlock(&mdev->graph_mutex); |
821ed366 | 670 | } |
b2ed8af9 MCC |
671 | EXPORT_SYMBOL_GPL(media_device_unregister_entity); |
672 | ||
176fb0d1 | 673 | /** |
9832e155 | 674 | * media_device_init() - initialize a media device |
176fb0d1 LP |
675 | * @mdev: The media device |
676 | * | |
677 | * The caller is responsible for initializing the media device before | |
678 | * registration. The following fields must be set: | |
679 | * | |
680 | * - dev must point to the parent device | |
681 | * - model must be filled with the device model name | |
682 | */ | |
9832e155 | 683 | void media_device_init(struct media_device *mdev) |
176fb0d1 | 684 | { |
53e269c1 | 685 | INIT_LIST_HEAD(&mdev->entities); |
57cf79b7 | 686 | INIT_LIST_HEAD(&mdev->interfaces); |
9155d859 MCC |
687 | INIT_LIST_HEAD(&mdev->pads); |
688 | INIT_LIST_HEAD(&mdev->links); | |
afcbdb55 | 689 | INIT_LIST_HEAD(&mdev->entity_notify); |
503c3d82 | 690 | mutex_init(&mdev->graph_mutex); |
665faa97 | 691 | ida_init(&mdev->entity_internal_idx); |
53e269c1 | 692 | |
9832e155 JMC |
693 | dev_dbg(mdev->dev, "Media device initialized\n"); |
694 | } | |
695 | EXPORT_SYMBOL_GPL(media_device_init); | |
696 | ||
9832e155 JMC |
697 | void media_device_cleanup(struct media_device *mdev) |
698 | { | |
665faa97 SA |
699 | ida_destroy(&mdev->entity_internal_idx); |
700 | mdev->entity_internal_idx_max = 0; | |
20b85227 | 701 | media_graph_walk_cleanup(&mdev->pm_count_walk); |
9832e155 JMC |
702 | mutex_destroy(&mdev->graph_mutex); |
703 | } | |
704 | EXPORT_SYMBOL_GPL(media_device_cleanup); | |
705 | ||
9832e155 JMC |
706 | int __must_check __media_device_register(struct media_device *mdev, |
707 | struct module *owner) | |
708 | { | |
a087ce70 | 709 | struct media_devnode *devnode; |
9832e155 JMC |
710 | int ret; |
711 | ||
a087ce70 MCC |
712 | devnode = kzalloc(sizeof(*devnode), GFP_KERNEL); |
713 | if (!devnode) | |
714 | return -ENOMEM; | |
715 | ||
176fb0d1 | 716 | /* Register the device node. */ |
a087ce70 MCC |
717 | mdev->devnode = devnode; |
718 | devnode->fops = &media_device_fops; | |
719 | devnode->parent = mdev->dev; | |
720 | devnode->release = media_device_release; | |
8a950796 JMC |
721 | |
722 | /* Set version 0 to indicate user-space that the graph is static */ | |
723 | mdev->topology_version = 0; | |
724 | ||
a087ce70 MCC |
725 | ret = media_devnode_register(mdev, devnode, owner); |
726 | if (ret < 0) { | |
5b28dde5 | 727 | /* devnode free is handled in media_devnode_*() */ |
a087ce70 | 728 | mdev->devnode = NULL; |
176fb0d1 | 729 | return ret; |
a087ce70 | 730 | } |
176fb0d1 | 731 | |
a087ce70 | 732 | ret = device_create_file(&devnode->dev, &dev_attr_model); |
176fb0d1 | 733 | if (ret < 0) { |
5b28dde5 | 734 | /* devnode free is handled in media_devnode_*() */ |
a087ce70 | 735 | mdev->devnode = NULL; |
6f0dd24a | 736 | media_devnode_unregister_prepare(devnode); |
a087ce70 | 737 | media_devnode_unregister(devnode); |
176fb0d1 LP |
738 | return ret; |
739 | } | |
740 | ||
8f5a3188 MCC |
741 | dev_dbg(mdev->dev, "Media device registered\n"); |
742 | ||
176fb0d1 LP |
743 | return 0; |
744 | } | |
85de721c | 745 | EXPORT_SYMBOL_GPL(__media_device_register); |
176fb0d1 | 746 | |
afcbdb55 SK |
747 | int __must_check media_device_register_entity_notify(struct media_device *mdev, |
748 | struct media_entity_notify *nptr) | |
749 | { | |
e2c91d4d | 750 | mutex_lock(&mdev->graph_mutex); |
afcbdb55 | 751 | list_add_tail(&nptr->list, &mdev->entity_notify); |
e2c91d4d | 752 | mutex_unlock(&mdev->graph_mutex); |
afcbdb55 SK |
753 | return 0; |
754 | } | |
755 | EXPORT_SYMBOL_GPL(media_device_register_entity_notify); | |
756 | ||
757 | /* | |
758 | * Note: Should be called with mdev->lock held. | |
759 | */ | |
760 | static void __media_device_unregister_entity_notify(struct media_device *mdev, | |
761 | struct media_entity_notify *nptr) | |
762 | { | |
763 | list_del(&nptr->list); | |
764 | } | |
765 | ||
766 | void media_device_unregister_entity_notify(struct media_device *mdev, | |
767 | struct media_entity_notify *nptr) | |
768 | { | |
e2c91d4d | 769 | mutex_lock(&mdev->graph_mutex); |
afcbdb55 | 770 | __media_device_unregister_entity_notify(mdev, nptr); |
e2c91d4d | 771 | mutex_unlock(&mdev->graph_mutex); |
afcbdb55 SK |
772 | } |
773 | EXPORT_SYMBOL_GPL(media_device_unregister_entity_notify); | |
774 | ||
176fb0d1 LP |
775 | void media_device_unregister(struct media_device *mdev) |
776 | { | |
53e269c1 LP |
777 | struct media_entity *entity; |
778 | struct media_entity *next; | |
d47109fa | 779 | struct media_interface *intf, *tmp_intf; |
afcbdb55 | 780 | struct media_entity_notify *notify, *nextp; |
d47109fa | 781 | |
821ed366 MCC |
782 | if (mdev == NULL) |
783 | return; | |
784 | ||
e2c91d4d | 785 | mutex_lock(&mdev->graph_mutex); |
821ed366 | 786 | |
223d19c5 | 787 | /* Check if mdev was ever registered at all */ |
a087ce70 | 788 | if (!media_devnode_is_registered(mdev->devnode)) { |
e2c91d4d | 789 | mutex_unlock(&mdev->graph_mutex); |
223d19c5 | 790 | return; |
821ed366 | 791 | } |
223d19c5 | 792 | |
6f0dd24a SK |
793 | /* Clear the devnode register bit to avoid races with media dev open */ |
794 | media_devnode_unregister_prepare(mdev->devnode); | |
795 | ||
f50d5166 MCC |
796 | /* Remove all entities from the media device */ |
797 | list_for_each_entry_safe(entity, next, &mdev->entities, graph_obj.list) | |
821ed366 | 798 | __media_device_unregister_entity(entity); |
f50d5166 | 799 | |
afcbdb55 SK |
800 | /* Remove all entity_notify callbacks from the media device */ |
801 | list_for_each_entry_safe(notify, nextp, &mdev->entity_notify, list) | |
802 | __media_device_unregister_entity_notify(mdev, notify); | |
803 | ||
d47109fa | 804 | /* Remove all interfaces from the media device */ |
d47109fa MCC |
805 | list_for_each_entry_safe(intf, tmp_intf, &mdev->interfaces, |
806 | graph_obj.list) { | |
e7cd17a2 MK |
807 | /* |
808 | * Unlink the interface, but don't free it here; the | |
809 | * module which created it is responsible for freeing | |
810 | * it | |
811 | */ | |
d47109fa | 812 | __media_remove_intf_links(intf); |
c350ef83 | 813 | media_gobj_destroy(&intf->graph_obj); |
d47109fa | 814 | } |
821ed366 | 815 | |
e2c91d4d | 816 | mutex_unlock(&mdev->graph_mutex); |
53e269c1 | 817 | |
a087ce70 MCC |
818 | dev_dbg(mdev->dev, "Media device unregistered\n"); |
819 | ||
6f0dd24a SK |
820 | device_remove_file(&mdev->devnode->dev, &dev_attr_model); |
821 | media_devnode_unregister(mdev->devnode); | |
822 | /* devnode free is handled in media_devnode_*() */ | |
823 | mdev->devnode = NULL; | |
176fb0d1 LP |
824 | } |
825 | EXPORT_SYMBOL_GPL(media_device_unregister); | |
53e269c1 | 826 | |
b34ecd5a | 827 | #if IS_ENABLED(CONFIG_PCI) |
6cf5dad1 MCC |
828 | void media_device_pci_init(struct media_device *mdev, |
829 | struct pci_dev *pci_dev, | |
830 | const char *name) | |
41b44e35 | 831 | { |
41b44e35 MCC |
832 | mdev->dev = &pci_dev->dev; |
833 | ||
834 | if (name) | |
835 | strlcpy(mdev->model, name, sizeof(mdev->model)); | |
836 | else | |
837 | strlcpy(mdev->model, pci_name(pci_dev), sizeof(mdev->model)); | |
838 | ||
839 | sprintf(mdev->bus_info, "PCI:%s", pci_name(pci_dev)); | |
840 | ||
841 | mdev->hw_revision = (pci_dev->subsystem_vendor << 16) | |
842 | | pci_dev->subsystem_device; | |
843 | ||
41b44e35 | 844 | media_device_init(mdev); |
41b44e35 MCC |
845 | } |
846 | EXPORT_SYMBOL_GPL(media_device_pci_init); | |
b34ecd5a | 847 | #endif |
41b44e35 | 848 | |
b34ecd5a | 849 | #if IS_ENABLED(CONFIG_USB) |
6cf5dad1 MCC |
850 | void __media_device_usb_init(struct media_device *mdev, |
851 | struct usb_device *udev, | |
852 | const char *board_name, | |
853 | const char *driver_name) | |
41b44e35 | 854 | { |
41b44e35 MCC |
855 | mdev->dev = &udev->dev; |
856 | ||
857 | if (driver_name) | |
858 | strlcpy(mdev->driver_name, driver_name, | |
859 | sizeof(mdev->driver_name)); | |
860 | ||
861 | if (board_name) | |
862 | strlcpy(mdev->model, board_name, sizeof(mdev->model)); | |
863 | else if (udev->product) | |
864 | strlcpy(mdev->model, udev->product, sizeof(mdev->model)); | |
865 | else | |
866 | strlcpy(mdev->model, "unknown model", sizeof(mdev->model)); | |
867 | if (udev->serial) | |
868 | strlcpy(mdev->serial, udev->serial, sizeof(mdev->serial)); | |
869 | usb_make_path(udev, mdev->bus_info, sizeof(mdev->bus_info)); | |
870 | mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice); | |
41b44e35 MCC |
871 | |
872 | media_device_init(mdev); | |
41b44e35 MCC |
873 | } |
874 | EXPORT_SYMBOL_GPL(__media_device_usb_init); | |
b34ecd5a | 875 | #endif |
41b44e35 MCC |
876 | |
877 | ||
e576d60b | 878 | #endif /* CONFIG_MEDIA_CONTROLLER */ |