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Commit | Line | Data |
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176fb0d1 LP |
1 | /* |
2 | * Media device | |
3 | * | |
4 | * Copyright (C) 2010 Nokia Corporation | |
5 | * | |
6 | * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com> | |
7 | * Sakari Ailus <sakari.ailus@iki.fi> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
b2cd2744 MCC |
23 | /* We need to access legacy defines from linux/media.h */ |
24 | #define __NEED_MEDIA_LEGACY_API | |
25 | ||
b0a1f2a8 SA |
26 | #include <linux/compat.h> |
27 | #include <linux/export.h> | |
665faa97 | 28 | #include <linux/idr.h> |
176fb0d1 | 29 | #include <linux/ioctl.h> |
140d8816 | 30 | #include <linux/media.h> |
57208e5e | 31 | #include <linux/slab.h> |
497e80cd | 32 | #include <linux/types.h> |
41b44e35 MCC |
33 | #include <linux/pci.h> |
34 | #include <linux/usb.h> | |
176fb0d1 LP |
35 | |
36 | #include <media/media-device.h> | |
37 | #include <media/media-devnode.h> | |
53e269c1 | 38 | #include <media/media-entity.h> |
176fb0d1 | 39 | |
e576d60b SK |
40 | #ifdef CONFIG_MEDIA_CONTROLLER |
41 | ||
140d8816 LP |
42 | /* ----------------------------------------------------------------------------- |
43 | * Userspace API | |
44 | */ | |
45 | ||
0629e991 SA |
46 | static inline void __user *media_get_uptr(__u64 arg) |
47 | { | |
48 | return (void __user *)(uintptr_t)arg; | |
49 | } | |
50 | ||
140d8816 LP |
51 | static int media_device_open(struct file *filp) |
52 | { | |
53 | return 0; | |
54 | } | |
55 | ||
56 | static int media_device_close(struct file *filp) | |
57 | { | |
58 | return 0; | |
59 | } | |
60 | ||
61 | static int media_device_get_info(struct media_device *dev, | |
bcd5081b | 62 | struct media_device_info *info) |
140d8816 | 63 | { |
bcd5081b | 64 | memset(info, 0, sizeof(*info)); |
140d8816 | 65 | |
bb07bd6b | 66 | if (dev->driver_name[0]) |
bcd5081b | 67 | strlcpy(info->driver, dev->driver_name, sizeof(info->driver)); |
bb07bd6b | 68 | else |
bcd5081b SA |
69 | strlcpy(info->driver, dev->dev->driver->name, |
70 | sizeof(info->driver)); | |
bb07bd6b | 71 | |
bcd5081b SA |
72 | strlcpy(info->model, dev->model, sizeof(info->model)); |
73 | strlcpy(info->serial, dev->serial, sizeof(info->serial)); | |
74 | strlcpy(info->bus_info, dev->bus_info, sizeof(info->bus_info)); | |
140d8816 | 75 | |
bcd5081b SA |
76 | info->media_version = MEDIA_API_VERSION; |
77 | info->hw_revision = dev->hw_revision; | |
78 | info->driver_version = dev->driver_version; | |
140d8816 | 79 | |
b17d3945 | 80 | return 0; |
140d8816 LP |
81 | } |
82 | ||
1651333b LP |
83 | static struct media_entity *find_entity(struct media_device *mdev, u32 id) |
84 | { | |
85 | struct media_entity *entity; | |
86 | int next = id & MEDIA_ENT_ID_FLAG_NEXT; | |
87 | ||
88 | id &= ~MEDIA_ENT_ID_FLAG_NEXT; | |
89 | ||
1651333b | 90 | media_device_for_each_entity(entity, mdev) { |
fa762394 MCC |
91 | if (((media_entity_id(entity) == id) && !next) || |
92 | ((media_entity_id(entity) > id) && next)) { | |
1651333b LP |
93 | return entity; |
94 | } | |
95 | } | |
96 | ||
1651333b LP |
97 | return NULL; |
98 | } | |
99 | ||
100 | static long media_device_enum_entities(struct media_device *mdev, | |
bcd5081b | 101 | struct media_entity_desc *entd) |
1651333b LP |
102 | { |
103 | struct media_entity *ent; | |
1651333b | 104 | |
bcd5081b | 105 | ent = find_entity(mdev, entd->id); |
1651333b LP |
106 | if (ent == NULL) |
107 | return -EINVAL; | |
108 | ||
bcd5081b SA |
109 | memset(entd, 0, sizeof(*entd)); |
110 | ||
111 | entd->id = media_entity_id(ent); | |
de8eae36 | 112 | if (ent->name) |
bcd5081b SA |
113 | strlcpy(entd->name, ent->name, sizeof(entd->name)); |
114 | entd->type = ent->function; | |
115 | entd->revision = 0; /* Unused */ | |
116 | entd->flags = ent->flags; | |
117 | entd->group_id = 0; /* Unused */ | |
118 | entd->pads = ent->num_pads; | |
119 | entd->links = ent->num_links - ent->num_backlinks; | |
b2cd2744 MCC |
120 | |
121 | /* | |
122 | * Workaround for a bug at media-ctl <= v1.10 that makes it to | |
123 | * do the wrong thing if the entity function doesn't belong to | |
124 | * either MEDIA_ENT_F_OLD_BASE or MEDIA_ENT_F_OLD_SUBDEV_BASE | |
125 | * Ranges. | |
126 | * | |
127 | * Non-subdevices are expected to be at the MEDIA_ENT_F_OLD_BASE, | |
128 | * or, otherwise, will be silently ignored by media-ctl when | |
129 | * printing the graphviz diagram. So, map them into the devnode | |
130 | * old range. | |
131 | */ | |
132 | if (ent->function < MEDIA_ENT_F_OLD_BASE || | |
133 | ent->function > MEDIA_ENT_T_DEVNODE_UNKNOWN) { | |
134 | if (is_media_entity_v4l2_subdev(ent)) | |
bcd5081b | 135 | entd->type = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN; |
b2cd2744 | 136 | else if (ent->function != MEDIA_ENT_F_IO_V4L) |
bcd5081b | 137 | entd->type = MEDIA_ENT_T_DEVNODE_UNKNOWN; |
b2cd2744 MCC |
138 | } |
139 | ||
bcd5081b SA |
140 | memcpy(&entd->raw, &ent->info, sizeof(ent->info)); |
141 | ||
1651333b LP |
142 | return 0; |
143 | } | |
144 | ||
145 | static void media_device_kpad_to_upad(const struct media_pad *kpad, | |
146 | struct media_pad_desc *upad) | |
147 | { | |
fa762394 | 148 | upad->entity = media_entity_id(kpad->entity); |
1651333b LP |
149 | upad->index = kpad->index; |
150 | upad->flags = kpad->flags; | |
151 | } | |
152 | ||
bcd5081b SA |
153 | static long media_device_enum_links(struct media_device *mdev, |
154 | struct media_links_enum *links) | |
1651333b LP |
155 | { |
156 | struct media_entity *entity; | |
1651333b | 157 | |
b0a1f2a8 | 158 | entity = find_entity(mdev, links->entity); |
1651333b LP |
159 | if (entity == NULL) |
160 | return -EINVAL; | |
161 | ||
b0a1f2a8 | 162 | if (links->pads) { |
1651333b LP |
163 | unsigned int p; |
164 | ||
165 | for (p = 0; p < entity->num_pads; p++) { | |
166 | struct media_pad_desc pad; | |
c88e739b DC |
167 | |
168 | memset(&pad, 0, sizeof(pad)); | |
1651333b | 169 | media_device_kpad_to_upad(&entity->pads[p], &pad); |
b0a1f2a8 | 170 | if (copy_to_user(&links->pads[p], &pad, sizeof(pad))) |
1651333b LP |
171 | return -EFAULT; |
172 | } | |
173 | } | |
174 | ||
b0a1f2a8 | 175 | if (links->links) { |
b83e2508 MCC |
176 | struct media_link *link; |
177 | struct media_link_desc __user *ulink_desc = links->links; | |
1651333b | 178 | |
b83e2508 MCC |
179 | list_for_each_entry(link, &entity->links, list) { |
180 | struct media_link_desc klink_desc; | |
1651333b LP |
181 | |
182 | /* Ignore backlinks. */ | |
b83e2508 | 183 | if (link->source->entity != entity) |
1651333b | 184 | continue; |
b83e2508 MCC |
185 | memset(&klink_desc, 0, sizeof(klink_desc)); |
186 | media_device_kpad_to_upad(link->source, | |
187 | &klink_desc.source); | |
188 | media_device_kpad_to_upad(link->sink, | |
189 | &klink_desc.sink); | |
190 | klink_desc.flags = link->flags; | |
191 | if (copy_to_user(ulink_desc, &klink_desc, | |
192 | sizeof(*ulink_desc))) | |
1651333b | 193 | return -EFAULT; |
b83e2508 | 194 | ulink_desc++; |
1651333b LP |
195 | } |
196 | } | |
b0a1f2a8 SA |
197 | |
198 | return 0; | |
199 | } | |
200 | ||
97548ed4 | 201 | static long media_device_setup_link(struct media_device *mdev, |
bcd5081b | 202 | struct media_link_desc *linkd) |
97548ed4 LP |
203 | { |
204 | struct media_link *link = NULL; | |
97548ed4 LP |
205 | struct media_entity *source; |
206 | struct media_entity *sink; | |
97548ed4 LP |
207 | |
208 | /* Find the source and sink entities and link. | |
209 | */ | |
bcd5081b SA |
210 | source = find_entity(mdev, linkd->source.entity); |
211 | sink = find_entity(mdev, linkd->sink.entity); | |
97548ed4 LP |
212 | |
213 | if (source == NULL || sink == NULL) | |
214 | return -EINVAL; | |
215 | ||
bcd5081b SA |
216 | if (linkd->source.index >= source->num_pads || |
217 | linkd->sink.index >= sink->num_pads) | |
97548ed4 LP |
218 | return -EINVAL; |
219 | ||
bcd5081b SA |
220 | link = media_entity_find_link(&source->pads[linkd->source.index], |
221 | &sink->pads[linkd->sink.index]); | |
97548ed4 LP |
222 | if (link == NULL) |
223 | return -EINVAL; | |
224 | ||
225 | /* Setup the link on both entities. */ | |
bcd5081b | 226 | return __media_entity_setup_link(link, linkd->flags); |
97548ed4 LP |
227 | } |
228 | ||
bcd5081b | 229 | static long media_device_get_topology(struct media_device *mdev, |
8309f47c MCC |
230 | struct media_v2_topology *topo) |
231 | { | |
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; | |
262 | strncpy(kentity.name, entity->name, | |
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; | |
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; | |
305 | ||
306 | /* Get pads and number of pads */ | |
307 | i = 0; | |
b3b7a9f1 | 308 | upad = media_get_uptr(topo->ptr_pads); |
8309f47c MCC |
309 | media_device_for_each_pad(pad, mdev) { |
310 | i++; | |
b3b7a9f1 | 311 | if (ret || !upad) |
8309f47c MCC |
312 | continue; |
313 | ||
314 | if (i > topo->num_pads) { | |
315 | ret = -ENOSPC; | |
316 | continue; | |
317 | } | |
318 | ||
b3b7a9f1 | 319 | memset(&kpad, 0, sizeof(kpad)); |
8309f47c MCC |
320 | |
321 | /* Copy pad fields to userspace struct */ | |
b3b7a9f1 MCC |
322 | kpad.id = pad->graph_obj.id; |
323 | kpad.entity_id = pad->entity->graph_obj.id; | |
324 | kpad.flags = pad->flags; | |
8309f47c | 325 | |
b3b7a9f1 | 326 | if (copy_to_user(upad, &kpad, sizeof(kpad))) |
8309f47c | 327 | ret = -EFAULT; |
b3b7a9f1 | 328 | upad++; |
8309f47c MCC |
329 | } |
330 | topo->num_pads = i; | |
331 | ||
332 | /* Get links and number of links */ | |
333 | i = 0; | |
b3b7a9f1 | 334 | ulink = media_get_uptr(topo->ptr_links); |
8309f47c | 335 | media_device_for_each_link(link, mdev) { |
39d1ebc6 MCC |
336 | if (link->is_backlink) |
337 | continue; | |
338 | ||
8309f47c MCC |
339 | i++; |
340 | ||
b3b7a9f1 | 341 | if (ret || !ulink) |
8309f47c MCC |
342 | continue; |
343 | ||
344 | if (i > topo->num_links) { | |
345 | ret = -ENOSPC; | |
346 | continue; | |
347 | } | |
348 | ||
b3b7a9f1 | 349 | memset(&klink, 0, sizeof(klink)); |
8309f47c MCC |
350 | |
351 | /* Copy link fields to userspace struct */ | |
b3b7a9f1 MCC |
352 | klink.id = link->graph_obj.id; |
353 | klink.source_id = link->gobj0->id; | |
354 | klink.sink_id = link->gobj1->id; | |
355 | klink.flags = link->flags; | |
8309f47c | 356 | |
b3b7a9f1 | 357 | if (copy_to_user(ulink, &klink, sizeof(klink))) |
8309f47c | 358 | ret = -EFAULT; |
b3b7a9f1 | 359 | ulink++; |
8309f47c MCC |
360 | } |
361 | topo->num_links = i; | |
362 | ||
363 | return ret; | |
364 | } | |
365 | ||
bcd5081b | 366 | static long copy_arg_from_user(void *karg, void __user *uarg, unsigned int cmd) |
8309f47c | 367 | { |
bcd5081b SA |
368 | /* All media IOCTLs are _IOWR() */ |
369 | if (copy_from_user(karg, uarg, _IOC_SIZE(cmd))) | |
a5c82e56 | 370 | return -EFAULT; |
8309f47c | 371 | |
bcd5081b SA |
372 | return 0; |
373 | } | |
8309f47c | 374 | |
bcd5081b SA |
375 | static long copy_arg_to_user(void __user *uarg, void *karg, unsigned int cmd) |
376 | { | |
377 | /* All media IOCTLs are _IOWR() */ | |
378 | if (copy_to_user(uarg, karg, _IOC_SIZE(cmd))) | |
a5c82e56 | 379 | return -EFAULT; |
8309f47c | 380 | |
a5c82e56 | 381 | return 0; |
8309f47c MCC |
382 | } |
383 | ||
bcd5081b SA |
384 | #define MEDIA_IOC_ARG(__cmd, func, from_user, to_user) \ |
385 | [_IOC_NR(MEDIA_IOC_##__cmd)] = { \ | |
386 | .cmd = MEDIA_IOC_##__cmd, \ | |
387 | .fn = (long (*)(struct media_device *, void *))func, \ | |
388 | .arg_from_user = from_user, \ | |
389 | .arg_to_user = to_user, \ | |
6975264c | 390 | } |
cf439d5f | 391 | |
bcd5081b SA |
392 | #define MEDIA_IOC(__cmd, func) \ |
393 | MEDIA_IOC_ARG(__cmd, func, copy_arg_from_user, copy_arg_to_user) | |
394 | ||
cf439d5f SA |
395 | /* the table is indexed by _IOC_NR(cmd) */ |
396 | struct media_ioctl_info { | |
397 | unsigned int cmd; | |
bcd5081b SA |
398 | long (*fn)(struct media_device *dev, void *arg); |
399 | long (*arg_from_user)(void *karg, void __user *uarg, unsigned int cmd); | |
400 | long (*arg_to_user)(void __user *uarg, void *karg, unsigned int cmd); | |
cf439d5f SA |
401 | }; |
402 | ||
403 | static const struct media_ioctl_info ioctl_info[] = { | |
6975264c SA |
404 | MEDIA_IOC(DEVICE_INFO, media_device_get_info), |
405 | MEDIA_IOC(ENUM_ENTITIES, media_device_enum_entities), | |
406 | MEDIA_IOC(ENUM_LINKS, media_device_enum_links), | |
407 | MEDIA_IOC(SETUP_LINK, media_device_setup_link), | |
408 | MEDIA_IOC(G_TOPOLOGY, media_device_get_topology), | |
cf439d5f SA |
409 | }; |
410 | ||
140d8816 | 411 | static long media_device_ioctl(struct file *filp, unsigned int cmd, |
bcd5081b | 412 | unsigned long __arg) |
140d8816 LP |
413 | { |
414 | struct media_devnode *devnode = media_devnode_data(filp); | |
a087ce70 | 415 | struct media_device *dev = devnode->media_dev; |
6975264c | 416 | const struct media_ioctl_info *info; |
bcd5081b SA |
417 | void __user *arg = (void __user *)__arg; |
418 | char __karg[256], *karg = __karg; | |
140d8816 LP |
419 | long ret; |
420 | ||
cf439d5f SA |
421 | if (_IOC_NR(cmd) >= ARRAY_SIZE(ioctl_info) |
422 | || ioctl_info[_IOC_NR(cmd)].cmd != cmd) | |
423 | return -ENOIOCTLCMD; | |
424 | ||
6975264c SA |
425 | info = &ioctl_info[_IOC_NR(cmd)]; |
426 | ||
bcd5081b SA |
427 | if (_IOC_SIZE(info->cmd) > sizeof(__karg)) { |
428 | karg = kmalloc(_IOC_SIZE(info->cmd), GFP_KERNEL); | |
429 | if (!karg) | |
430 | return -ENOMEM; | |
431 | } | |
432 | ||
433 | if (info->arg_from_user) { | |
434 | ret = info->arg_from_user(karg, arg, cmd); | |
435 | if (ret) | |
436 | goto out_free; | |
437 | } | |
438 | ||
e2c91d4d | 439 | mutex_lock(&dev->graph_mutex); |
bcd5081b | 440 | ret = info->fn(dev, karg); |
e2c91d4d | 441 | mutex_unlock(&dev->graph_mutex); |
140d8816 | 442 | |
bcd5081b SA |
443 | if (!ret && info->arg_to_user) |
444 | ret = info->arg_to_user(arg, karg, cmd); | |
445 | ||
446 | out_free: | |
447 | if (karg != __karg) | |
448 | kfree(karg); | |
449 | ||
140d8816 LP |
450 | return ret; |
451 | } | |
452 | ||
b0a1f2a8 SA |
453 | #ifdef CONFIG_COMPAT |
454 | ||
455 | struct media_links_enum32 { | |
456 | __u32 entity; | |
457 | compat_uptr_t pads; /* struct media_pad_desc * */ | |
458 | compat_uptr_t links; /* struct media_link_desc * */ | |
459 | __u32 reserved[4]; | |
460 | }; | |
461 | ||
462 | static long media_device_enum_links32(struct media_device *mdev, | |
463 | struct media_links_enum32 __user *ulinks) | |
464 | { | |
465 | struct media_links_enum links; | |
466 | compat_uptr_t pads_ptr, links_ptr; | |
467 | ||
468 | memset(&links, 0, sizeof(links)); | |
469 | ||
470 | if (get_user(links.entity, &ulinks->entity) | |
471 | || get_user(pads_ptr, &ulinks->pads) | |
472 | || get_user(links_ptr, &ulinks->links)) | |
473 | return -EFAULT; | |
474 | ||
475 | links.pads = compat_ptr(pads_ptr); | |
476 | links.links = compat_ptr(links_ptr); | |
477 | ||
bcd5081b | 478 | return media_device_enum_links(mdev, &links); |
b0a1f2a8 SA |
479 | } |
480 | ||
481 | #define MEDIA_IOC_ENUM_LINKS32 _IOWR('|', 0x02, struct media_links_enum32) | |
482 | ||
483 | static long media_device_compat_ioctl(struct file *filp, unsigned int cmd, | |
484 | unsigned long arg) | |
485 | { | |
486 | struct media_devnode *devnode = media_devnode_data(filp); | |
a087ce70 | 487 | struct media_device *dev = devnode->media_dev; |
b0a1f2a8 SA |
488 | long ret; |
489 | ||
490 | switch (cmd) { | |
b0a1f2a8 SA |
491 | case MEDIA_IOC_ENUM_LINKS32: |
492 | mutex_lock(&dev->graph_mutex); | |
493 | ret = media_device_enum_links32(dev, | |
494 | (struct media_links_enum32 __user *)arg); | |
495 | mutex_unlock(&dev->graph_mutex); | |
496 | break; | |
497 | ||
498 | default: | |
f7369627 | 499 | return media_device_ioctl(filp, cmd, arg); |
b0a1f2a8 SA |
500 | } |
501 | ||
502 | return ret; | |
503 | } | |
504 | #endif /* CONFIG_COMPAT */ | |
505 | ||
176fb0d1 LP |
506 | static const struct media_file_operations media_device_fops = { |
507 | .owner = THIS_MODULE, | |
140d8816 LP |
508 | .open = media_device_open, |
509 | .ioctl = media_device_ioctl, | |
b0a1f2a8 SA |
510 | #ifdef CONFIG_COMPAT |
511 | .compat_ioctl = media_device_compat_ioctl, | |
512 | #endif /* CONFIG_COMPAT */ | |
140d8816 | 513 | .release = media_device_close, |
176fb0d1 LP |
514 | }; |
515 | ||
516 | /* ----------------------------------------------------------------------------- | |
517 | * sysfs | |
518 | */ | |
519 | ||
520 | static ssize_t show_model(struct device *cd, | |
521 | struct device_attribute *attr, char *buf) | |
522 | { | |
a087ce70 MCC |
523 | struct media_devnode *devnode = to_media_devnode(cd); |
524 | struct media_device *mdev = devnode->media_dev; | |
176fb0d1 LP |
525 | |
526 | return sprintf(buf, "%.*s\n", (int)sizeof(mdev->model), mdev->model); | |
527 | } | |
528 | ||
529 | static DEVICE_ATTR(model, S_IRUGO, show_model, NULL); | |
530 | ||
531 | /* ----------------------------------------------------------------------------- | |
532 | * Registration/unregistration | |
533 | */ | |
534 | ||
535 | static void media_device_release(struct media_devnode *mdev) | |
536 | { | |
8f5a3188 | 537 | dev_dbg(mdev->parent, "Media device released\n"); |
176fb0d1 LP |
538 | } |
539 | ||
b2ed8af9 MCC |
540 | /** |
541 | * media_device_register_entity - Register an entity with a media device | |
542 | * @mdev: The media device | |
543 | * @entity: The entity | |
544 | */ | |
545 | int __must_check media_device_register_entity(struct media_device *mdev, | |
546 | struct media_entity *entity) | |
547 | { | |
afcbdb55 | 548 | struct media_entity_notify *notify, *next; |
b2ed8af9 | 549 | unsigned int i; |
ba0dd729 | 550 | int ret; |
b2ed8af9 MCC |
551 | |
552 | if (entity->function == MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN || | |
553 | entity->function == MEDIA_ENT_F_UNKNOWN) | |
554 | dev_warn(mdev->dev, | |
555 | "Entity type for entity %s was not initialized!\n", | |
556 | entity->name); | |
557 | ||
558 | /* Warn if we apparently re-register an entity */ | |
559 | WARN_ON(entity->graph_obj.mdev != NULL); | |
560 | entity->graph_obj.mdev = mdev; | |
561 | INIT_LIST_HEAD(&entity->links); | |
562 | entity->num_links = 0; | |
563 | entity->num_backlinks = 0; | |
564 | ||
ba0dd729 MCC |
565 | if (!ida_pre_get(&mdev->entity_internal_idx, GFP_KERNEL)) |
566 | return -ENOMEM; | |
567 | ||
e2c91d4d | 568 | mutex_lock(&mdev->graph_mutex); |
665faa97 | 569 | |
ba0dd729 MCC |
570 | ret = ida_get_new_above(&mdev->entity_internal_idx, 1, |
571 | &entity->internal_idx); | |
572 | if (ret < 0) { | |
e2c91d4d | 573 | mutex_unlock(&mdev->graph_mutex); |
ba0dd729 | 574 | return ret; |
665faa97 SA |
575 | } |
576 | ||
577 | mdev->entity_internal_idx_max = | |
578 | max(mdev->entity_internal_idx_max, entity->internal_idx); | |
579 | ||
b2ed8af9 MCC |
580 | /* Initialize media_gobj embedded at the entity */ |
581 | media_gobj_create(mdev, MEDIA_GRAPH_ENTITY, &entity->graph_obj); | |
582 | ||
583 | /* Initialize objects at the pads */ | |
584 | for (i = 0; i < entity->num_pads; i++) | |
585 | media_gobj_create(mdev, MEDIA_GRAPH_PAD, | |
586 | &entity->pads[i].graph_obj); | |
587 | ||
afcbdb55 SK |
588 | /* invoke entity_notify callbacks */ |
589 | list_for_each_entry_safe(notify, next, &mdev->entity_notify, list) { | |
590 | (notify)->notify(entity, notify->notify_data); | |
591 | } | |
592 | ||
0c426c47 SA |
593 | if (mdev->entity_internal_idx_max |
594 | >= mdev->pm_count_walk.ent_enum.idx_max) { | |
595 | struct media_entity_graph new = { .top = 0 }; | |
596 | ||
597 | /* | |
598 | * Initialise the new graph walk before cleaning up | |
599 | * the old one in order not to spoil the graph walk | |
600 | * object of the media device if graph walk init fails. | |
601 | */ | |
602 | ret = media_entity_graph_walk_init(&new, mdev); | |
603 | if (ret) { | |
604 | mutex_unlock(&mdev->graph_mutex); | |
605 | return ret; | |
606 | } | |
607 | media_entity_graph_walk_cleanup(&mdev->pm_count_walk); | |
608 | mdev->pm_count_walk = new; | |
609 | } | |
610 | mutex_unlock(&mdev->graph_mutex); | |
611 | ||
b2ed8af9 MCC |
612 | return 0; |
613 | } | |
614 | EXPORT_SYMBOL_GPL(media_device_register_entity); | |
615 | ||
821ed366 | 616 | static void __media_device_unregister_entity(struct media_entity *entity) |
b2ed8af9 MCC |
617 | { |
618 | struct media_device *mdev = entity->graph_obj.mdev; | |
619 | struct media_link *link, *tmp; | |
620 | struct media_interface *intf; | |
621 | unsigned int i; | |
622 | ||
665faa97 SA |
623 | ida_simple_remove(&mdev->entity_internal_idx, entity->internal_idx); |
624 | ||
b2ed8af9 MCC |
625 | /* Remove all interface links pointing to this entity */ |
626 | list_for_each_entry(intf, &mdev->interfaces, graph_obj.list) { | |
627 | list_for_each_entry_safe(link, tmp, &intf->links, list) { | |
628 | if (link->entity == entity) | |
629 | __media_remove_intf_link(link); | |
630 | } | |
631 | } | |
632 | ||
633 | /* Remove all data links that belong to this entity */ | |
634 | __media_entity_remove_links(entity); | |
635 | ||
636 | /* Remove all pads that belong to this entity */ | |
637 | for (i = 0; i < entity->num_pads; i++) | |
638 | media_gobj_destroy(&entity->pads[i].graph_obj); | |
639 | ||
640 | /* Remove the entity */ | |
641 | media_gobj_destroy(&entity->graph_obj); | |
642 | ||
afcbdb55 SK |
643 | /* invoke entity_notify callbacks to handle entity removal?? */ |
644 | ||
b2ed8af9 MCC |
645 | entity->graph_obj.mdev = NULL; |
646 | } | |
821ed366 MCC |
647 | |
648 | void media_device_unregister_entity(struct media_entity *entity) | |
649 | { | |
650 | struct media_device *mdev = entity->graph_obj.mdev; | |
651 | ||
652 | if (mdev == NULL) | |
653 | return; | |
654 | ||
e2c91d4d | 655 | mutex_lock(&mdev->graph_mutex); |
821ed366 | 656 | __media_device_unregister_entity(entity); |
e2c91d4d | 657 | mutex_unlock(&mdev->graph_mutex); |
821ed366 | 658 | } |
b2ed8af9 MCC |
659 | EXPORT_SYMBOL_GPL(media_device_unregister_entity); |
660 | ||
176fb0d1 | 661 | /** |
9832e155 | 662 | * media_device_init() - initialize a media device |
176fb0d1 LP |
663 | * @mdev: The media device |
664 | * | |
665 | * The caller is responsible for initializing the media device before | |
666 | * registration. The following fields must be set: | |
667 | * | |
668 | * - dev must point to the parent device | |
669 | * - model must be filled with the device model name | |
670 | */ | |
9832e155 | 671 | void media_device_init(struct media_device *mdev) |
176fb0d1 | 672 | { |
53e269c1 | 673 | INIT_LIST_HEAD(&mdev->entities); |
57cf79b7 | 674 | INIT_LIST_HEAD(&mdev->interfaces); |
9155d859 MCC |
675 | INIT_LIST_HEAD(&mdev->pads); |
676 | INIT_LIST_HEAD(&mdev->links); | |
afcbdb55 | 677 | INIT_LIST_HEAD(&mdev->entity_notify); |
503c3d82 | 678 | mutex_init(&mdev->graph_mutex); |
665faa97 | 679 | ida_init(&mdev->entity_internal_idx); |
53e269c1 | 680 | |
9832e155 JMC |
681 | dev_dbg(mdev->dev, "Media device initialized\n"); |
682 | } | |
683 | EXPORT_SYMBOL_GPL(media_device_init); | |
684 | ||
9832e155 JMC |
685 | void media_device_cleanup(struct media_device *mdev) |
686 | { | |
665faa97 SA |
687 | ida_destroy(&mdev->entity_internal_idx); |
688 | mdev->entity_internal_idx_max = 0; | |
0c426c47 | 689 | media_entity_graph_walk_cleanup(&mdev->pm_count_walk); |
9832e155 JMC |
690 | mutex_destroy(&mdev->graph_mutex); |
691 | } | |
692 | EXPORT_SYMBOL_GPL(media_device_cleanup); | |
693 | ||
9832e155 JMC |
694 | int __must_check __media_device_register(struct media_device *mdev, |
695 | struct module *owner) | |
696 | { | |
a087ce70 | 697 | struct media_devnode *devnode; |
9832e155 JMC |
698 | int ret; |
699 | ||
a087ce70 MCC |
700 | devnode = kzalloc(sizeof(*devnode), GFP_KERNEL); |
701 | if (!devnode) | |
702 | return -ENOMEM; | |
703 | ||
176fb0d1 | 704 | /* Register the device node. */ |
a087ce70 MCC |
705 | mdev->devnode = devnode; |
706 | devnode->fops = &media_device_fops; | |
707 | devnode->parent = mdev->dev; | |
708 | devnode->release = media_device_release; | |
8a950796 JMC |
709 | |
710 | /* Set version 0 to indicate user-space that the graph is static */ | |
711 | mdev->topology_version = 0; | |
712 | ||
a087ce70 MCC |
713 | ret = media_devnode_register(mdev, devnode, owner); |
714 | if (ret < 0) { | |
5b28dde5 | 715 | /* devnode free is handled in media_devnode_*() */ |
a087ce70 | 716 | mdev->devnode = NULL; |
176fb0d1 | 717 | return ret; |
a087ce70 | 718 | } |
176fb0d1 | 719 | |
a087ce70 | 720 | ret = device_create_file(&devnode->dev, &dev_attr_model); |
176fb0d1 | 721 | if (ret < 0) { |
5b28dde5 | 722 | /* devnode free is handled in media_devnode_*() */ |
a087ce70 | 723 | mdev->devnode = NULL; |
6f0dd24a | 724 | media_devnode_unregister_prepare(devnode); |
a087ce70 | 725 | media_devnode_unregister(devnode); |
176fb0d1 LP |
726 | return ret; |
727 | } | |
728 | ||
8f5a3188 MCC |
729 | dev_dbg(mdev->dev, "Media device registered\n"); |
730 | ||
176fb0d1 LP |
731 | return 0; |
732 | } | |
85de721c | 733 | EXPORT_SYMBOL_GPL(__media_device_register); |
176fb0d1 | 734 | |
afcbdb55 SK |
735 | int __must_check media_device_register_entity_notify(struct media_device *mdev, |
736 | struct media_entity_notify *nptr) | |
737 | { | |
e2c91d4d | 738 | mutex_lock(&mdev->graph_mutex); |
afcbdb55 | 739 | list_add_tail(&nptr->list, &mdev->entity_notify); |
e2c91d4d | 740 | mutex_unlock(&mdev->graph_mutex); |
afcbdb55 SK |
741 | return 0; |
742 | } | |
743 | EXPORT_SYMBOL_GPL(media_device_register_entity_notify); | |
744 | ||
745 | /* | |
746 | * Note: Should be called with mdev->lock held. | |
747 | */ | |
748 | static void __media_device_unregister_entity_notify(struct media_device *mdev, | |
749 | struct media_entity_notify *nptr) | |
750 | { | |
751 | list_del(&nptr->list); | |
752 | } | |
753 | ||
754 | void media_device_unregister_entity_notify(struct media_device *mdev, | |
755 | struct media_entity_notify *nptr) | |
756 | { | |
e2c91d4d | 757 | mutex_lock(&mdev->graph_mutex); |
afcbdb55 | 758 | __media_device_unregister_entity_notify(mdev, nptr); |
e2c91d4d | 759 | mutex_unlock(&mdev->graph_mutex); |
afcbdb55 SK |
760 | } |
761 | EXPORT_SYMBOL_GPL(media_device_unregister_entity_notify); | |
762 | ||
176fb0d1 LP |
763 | void media_device_unregister(struct media_device *mdev) |
764 | { | |
53e269c1 LP |
765 | struct media_entity *entity; |
766 | struct media_entity *next; | |
d47109fa | 767 | struct media_interface *intf, *tmp_intf; |
afcbdb55 | 768 | struct media_entity_notify *notify, *nextp; |
d47109fa | 769 | |
821ed366 MCC |
770 | if (mdev == NULL) |
771 | return; | |
772 | ||
e2c91d4d | 773 | mutex_lock(&mdev->graph_mutex); |
821ed366 | 774 | |
223d19c5 | 775 | /* Check if mdev was ever registered at all */ |
a087ce70 | 776 | if (!media_devnode_is_registered(mdev->devnode)) { |
e2c91d4d | 777 | mutex_unlock(&mdev->graph_mutex); |
223d19c5 | 778 | return; |
821ed366 | 779 | } |
223d19c5 | 780 | |
6f0dd24a SK |
781 | /* Clear the devnode register bit to avoid races with media dev open */ |
782 | media_devnode_unregister_prepare(mdev->devnode); | |
783 | ||
f50d5166 MCC |
784 | /* Remove all entities from the media device */ |
785 | list_for_each_entry_safe(entity, next, &mdev->entities, graph_obj.list) | |
821ed366 | 786 | __media_device_unregister_entity(entity); |
f50d5166 | 787 | |
afcbdb55 SK |
788 | /* Remove all entity_notify callbacks from the media device */ |
789 | list_for_each_entry_safe(notify, nextp, &mdev->entity_notify, list) | |
790 | __media_device_unregister_entity_notify(mdev, notify); | |
791 | ||
d47109fa | 792 | /* Remove all interfaces from the media device */ |
d47109fa MCC |
793 | list_for_each_entry_safe(intf, tmp_intf, &mdev->interfaces, |
794 | graph_obj.list) { | |
795 | __media_remove_intf_links(intf); | |
c350ef83 | 796 | media_gobj_destroy(&intf->graph_obj); |
d47109fa MCC |
797 | kfree(intf); |
798 | } | |
821ed366 | 799 | |
e2c91d4d | 800 | mutex_unlock(&mdev->graph_mutex); |
53e269c1 | 801 | |
a087ce70 MCC |
802 | dev_dbg(mdev->dev, "Media device unregistered\n"); |
803 | ||
6f0dd24a SK |
804 | device_remove_file(&mdev->devnode->dev, &dev_attr_model); |
805 | media_devnode_unregister(mdev->devnode); | |
806 | /* devnode free is handled in media_devnode_*() */ | |
807 | mdev->devnode = NULL; | |
176fb0d1 LP |
808 | } |
809 | EXPORT_SYMBOL_GPL(media_device_unregister); | |
53e269c1 | 810 | |
d062f911 SK |
811 | static void media_device_release_devres(struct device *dev, void *res) |
812 | { | |
813 | } | |
814 | ||
d062f911 SK |
815 | struct media_device *media_device_get_devres(struct device *dev) |
816 | { | |
817 | struct media_device *mdev; | |
818 | ||
819 | mdev = devres_find(dev, media_device_release_devres, NULL, NULL); | |
820 | if (mdev) | |
821 | return mdev; | |
822 | ||
823 | mdev = devres_alloc(media_device_release_devres, | |
824 | sizeof(struct media_device), GFP_KERNEL); | |
825 | if (!mdev) | |
826 | return NULL; | |
827 | return devres_get(dev, mdev, NULL, NULL); | |
828 | } | |
829 | EXPORT_SYMBOL_GPL(media_device_get_devres); | |
830 | ||
d062f911 SK |
831 | struct media_device *media_device_find_devres(struct device *dev) |
832 | { | |
833 | return devres_find(dev, media_device_release_devres, NULL, NULL); | |
834 | } | |
835 | EXPORT_SYMBOL_GPL(media_device_find_devres); | |
e576d60b | 836 | |
b34ecd5a | 837 | #if IS_ENABLED(CONFIG_PCI) |
6cf5dad1 MCC |
838 | void media_device_pci_init(struct media_device *mdev, |
839 | struct pci_dev *pci_dev, | |
840 | const char *name) | |
41b44e35 | 841 | { |
41b44e35 MCC |
842 | mdev->dev = &pci_dev->dev; |
843 | ||
844 | if (name) | |
845 | strlcpy(mdev->model, name, sizeof(mdev->model)); | |
846 | else | |
847 | strlcpy(mdev->model, pci_name(pci_dev), sizeof(mdev->model)); | |
848 | ||
849 | sprintf(mdev->bus_info, "PCI:%s", pci_name(pci_dev)); | |
850 | ||
851 | mdev->hw_revision = (pci_dev->subsystem_vendor << 16) | |
852 | | pci_dev->subsystem_device; | |
853 | ||
854 | mdev->driver_version = LINUX_VERSION_CODE; | |
855 | ||
856 | media_device_init(mdev); | |
41b44e35 MCC |
857 | } |
858 | EXPORT_SYMBOL_GPL(media_device_pci_init); | |
b34ecd5a | 859 | #endif |
41b44e35 | 860 | |
b34ecd5a | 861 | #if IS_ENABLED(CONFIG_USB) |
6cf5dad1 MCC |
862 | void __media_device_usb_init(struct media_device *mdev, |
863 | struct usb_device *udev, | |
864 | const char *board_name, | |
865 | const char *driver_name) | |
41b44e35 | 866 | { |
41b44e35 MCC |
867 | mdev->dev = &udev->dev; |
868 | ||
869 | if (driver_name) | |
870 | strlcpy(mdev->driver_name, driver_name, | |
871 | sizeof(mdev->driver_name)); | |
872 | ||
873 | if (board_name) | |
874 | strlcpy(mdev->model, board_name, sizeof(mdev->model)); | |
875 | else if (udev->product) | |
876 | strlcpy(mdev->model, udev->product, sizeof(mdev->model)); | |
877 | else | |
878 | strlcpy(mdev->model, "unknown model", sizeof(mdev->model)); | |
879 | if (udev->serial) | |
880 | strlcpy(mdev->serial, udev->serial, sizeof(mdev->serial)); | |
881 | usb_make_path(udev, mdev->bus_info, sizeof(mdev->bus_info)); | |
882 | mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice); | |
883 | mdev->driver_version = LINUX_VERSION_CODE; | |
884 | ||
885 | media_device_init(mdev); | |
41b44e35 MCC |
886 | } |
887 | EXPORT_SYMBOL_GPL(__media_device_usb_init); | |
b34ecd5a | 888 | #endif |
41b44e35 MCC |
889 | |
890 | ||
e576d60b | 891 | #endif /* CONFIG_MEDIA_CONTROLLER */ |