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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 | ||
7d4b6402 SA |
384 | /* Do acquire the graph mutex */ |
385 | #define MEDIA_IOC_FL_GRAPH_MUTEX BIT(0) | |
386 | ||
387 | #define MEDIA_IOC_ARG(__cmd, func, fl, from_user, to_user) \ | |
388 | [_IOC_NR(MEDIA_IOC_##__cmd)] = { \ | |
389 | .cmd = MEDIA_IOC_##__cmd, \ | |
bcd5081b | 390 | .fn = (long (*)(struct media_device *, void *))func, \ |
7d4b6402 SA |
391 | .flags = fl, \ |
392 | .arg_from_user = from_user, \ | |
393 | .arg_to_user = to_user, \ | |
6975264c | 394 | } |
cf439d5f | 395 | |
7d4b6402 SA |
396 | #define MEDIA_IOC(__cmd, func, fl) \ |
397 | MEDIA_IOC_ARG(__cmd, func, fl, copy_arg_from_user, copy_arg_to_user) | |
bcd5081b | 398 | |
cf439d5f SA |
399 | /* the table is indexed by _IOC_NR(cmd) */ |
400 | struct media_ioctl_info { | |
401 | unsigned int cmd; | |
7d4b6402 | 402 | unsigned short flags; |
bcd5081b SA |
403 | long (*fn)(struct media_device *dev, void *arg); |
404 | long (*arg_from_user)(void *karg, void __user *uarg, unsigned int cmd); | |
405 | long (*arg_to_user)(void __user *uarg, void *karg, unsigned int cmd); | |
cf439d5f SA |
406 | }; |
407 | ||
408 | static const struct media_ioctl_info ioctl_info[] = { | |
7d4b6402 SA |
409 | MEDIA_IOC(DEVICE_INFO, media_device_get_info, MEDIA_IOC_FL_GRAPH_MUTEX), |
410 | MEDIA_IOC(ENUM_ENTITIES, media_device_enum_entities, MEDIA_IOC_FL_GRAPH_MUTEX), | |
411 | MEDIA_IOC(ENUM_LINKS, media_device_enum_links, MEDIA_IOC_FL_GRAPH_MUTEX), | |
412 | MEDIA_IOC(SETUP_LINK, media_device_setup_link, MEDIA_IOC_FL_GRAPH_MUTEX), | |
413 | MEDIA_IOC(G_TOPOLOGY, media_device_get_topology, MEDIA_IOC_FL_GRAPH_MUTEX), | |
cf439d5f SA |
414 | }; |
415 | ||
140d8816 | 416 | static long media_device_ioctl(struct file *filp, unsigned int cmd, |
bcd5081b | 417 | unsigned long __arg) |
140d8816 LP |
418 | { |
419 | struct media_devnode *devnode = media_devnode_data(filp); | |
a087ce70 | 420 | struct media_device *dev = devnode->media_dev; |
6975264c | 421 | const struct media_ioctl_info *info; |
bcd5081b SA |
422 | void __user *arg = (void __user *)__arg; |
423 | char __karg[256], *karg = __karg; | |
140d8816 LP |
424 | long ret; |
425 | ||
cf439d5f SA |
426 | if (_IOC_NR(cmd) >= ARRAY_SIZE(ioctl_info) |
427 | || ioctl_info[_IOC_NR(cmd)].cmd != cmd) | |
428 | return -ENOIOCTLCMD; | |
429 | ||
6975264c SA |
430 | info = &ioctl_info[_IOC_NR(cmd)]; |
431 | ||
bcd5081b SA |
432 | if (_IOC_SIZE(info->cmd) > sizeof(__karg)) { |
433 | karg = kmalloc(_IOC_SIZE(info->cmd), GFP_KERNEL); | |
434 | if (!karg) | |
435 | return -ENOMEM; | |
436 | } | |
437 | ||
438 | if (info->arg_from_user) { | |
439 | ret = info->arg_from_user(karg, arg, cmd); | |
440 | if (ret) | |
441 | goto out_free; | |
442 | } | |
443 | ||
7d4b6402 SA |
444 | if (info->flags & MEDIA_IOC_FL_GRAPH_MUTEX) |
445 | mutex_lock(&dev->graph_mutex); | |
446 | ||
bcd5081b | 447 | ret = info->fn(dev, karg); |
7d4b6402 SA |
448 | |
449 | if (info->flags & MEDIA_IOC_FL_GRAPH_MUTEX) | |
450 | mutex_unlock(&dev->graph_mutex); | |
140d8816 | 451 | |
bcd5081b SA |
452 | if (!ret && info->arg_to_user) |
453 | ret = info->arg_to_user(arg, karg, cmd); | |
454 | ||
455 | out_free: | |
456 | if (karg != __karg) | |
457 | kfree(karg); | |
458 | ||
140d8816 LP |
459 | return ret; |
460 | } | |
461 | ||
b0a1f2a8 SA |
462 | #ifdef CONFIG_COMPAT |
463 | ||
464 | struct media_links_enum32 { | |
465 | __u32 entity; | |
466 | compat_uptr_t pads; /* struct media_pad_desc * */ | |
467 | compat_uptr_t links; /* struct media_link_desc * */ | |
468 | __u32 reserved[4]; | |
469 | }; | |
470 | ||
471 | static long media_device_enum_links32(struct media_device *mdev, | |
472 | struct media_links_enum32 __user *ulinks) | |
473 | { | |
474 | struct media_links_enum links; | |
475 | compat_uptr_t pads_ptr, links_ptr; | |
476 | ||
477 | memset(&links, 0, sizeof(links)); | |
478 | ||
479 | if (get_user(links.entity, &ulinks->entity) | |
480 | || get_user(pads_ptr, &ulinks->pads) | |
481 | || get_user(links_ptr, &ulinks->links)) | |
482 | return -EFAULT; | |
483 | ||
484 | links.pads = compat_ptr(pads_ptr); | |
485 | links.links = compat_ptr(links_ptr); | |
486 | ||
bcd5081b | 487 | return media_device_enum_links(mdev, &links); |
b0a1f2a8 SA |
488 | } |
489 | ||
490 | #define MEDIA_IOC_ENUM_LINKS32 _IOWR('|', 0x02, struct media_links_enum32) | |
491 | ||
492 | static long media_device_compat_ioctl(struct file *filp, unsigned int cmd, | |
493 | unsigned long arg) | |
494 | { | |
495 | struct media_devnode *devnode = media_devnode_data(filp); | |
a087ce70 | 496 | struct media_device *dev = devnode->media_dev; |
b0a1f2a8 SA |
497 | long ret; |
498 | ||
499 | switch (cmd) { | |
b0a1f2a8 SA |
500 | case MEDIA_IOC_ENUM_LINKS32: |
501 | mutex_lock(&dev->graph_mutex); | |
502 | ret = media_device_enum_links32(dev, | |
503 | (struct media_links_enum32 __user *)arg); | |
504 | mutex_unlock(&dev->graph_mutex); | |
505 | break; | |
506 | ||
507 | default: | |
f7369627 | 508 | return media_device_ioctl(filp, cmd, arg); |
b0a1f2a8 SA |
509 | } |
510 | ||
511 | return ret; | |
512 | } | |
513 | #endif /* CONFIG_COMPAT */ | |
514 | ||
176fb0d1 LP |
515 | static const struct media_file_operations media_device_fops = { |
516 | .owner = THIS_MODULE, | |
140d8816 LP |
517 | .open = media_device_open, |
518 | .ioctl = media_device_ioctl, | |
b0a1f2a8 SA |
519 | #ifdef CONFIG_COMPAT |
520 | .compat_ioctl = media_device_compat_ioctl, | |
521 | #endif /* CONFIG_COMPAT */ | |
140d8816 | 522 | .release = media_device_close, |
176fb0d1 LP |
523 | }; |
524 | ||
525 | /* ----------------------------------------------------------------------------- | |
526 | * sysfs | |
527 | */ | |
528 | ||
529 | static ssize_t show_model(struct device *cd, | |
530 | struct device_attribute *attr, char *buf) | |
531 | { | |
a087ce70 MCC |
532 | struct media_devnode *devnode = to_media_devnode(cd); |
533 | struct media_device *mdev = devnode->media_dev; | |
176fb0d1 LP |
534 | |
535 | return sprintf(buf, "%.*s\n", (int)sizeof(mdev->model), mdev->model); | |
536 | } | |
537 | ||
538 | static DEVICE_ATTR(model, S_IRUGO, show_model, NULL); | |
539 | ||
540 | /* ----------------------------------------------------------------------------- | |
541 | * Registration/unregistration | |
542 | */ | |
543 | ||
544 | static void media_device_release(struct media_devnode *mdev) | |
545 | { | |
8f5a3188 | 546 | dev_dbg(mdev->parent, "Media device released\n"); |
176fb0d1 LP |
547 | } |
548 | ||
b2ed8af9 MCC |
549 | /** |
550 | * media_device_register_entity - Register an entity with a media device | |
551 | * @mdev: The media device | |
552 | * @entity: The entity | |
553 | */ | |
554 | int __must_check media_device_register_entity(struct media_device *mdev, | |
555 | struct media_entity *entity) | |
556 | { | |
afcbdb55 | 557 | struct media_entity_notify *notify, *next; |
b2ed8af9 | 558 | unsigned int i; |
ba0dd729 | 559 | int ret; |
b2ed8af9 MCC |
560 | |
561 | if (entity->function == MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN || | |
562 | entity->function == MEDIA_ENT_F_UNKNOWN) | |
563 | dev_warn(mdev->dev, | |
564 | "Entity type for entity %s was not initialized!\n", | |
565 | entity->name); | |
566 | ||
567 | /* Warn if we apparently re-register an entity */ | |
568 | WARN_ON(entity->graph_obj.mdev != NULL); | |
569 | entity->graph_obj.mdev = mdev; | |
570 | INIT_LIST_HEAD(&entity->links); | |
571 | entity->num_links = 0; | |
572 | entity->num_backlinks = 0; | |
573 | ||
ba0dd729 MCC |
574 | if (!ida_pre_get(&mdev->entity_internal_idx, GFP_KERNEL)) |
575 | return -ENOMEM; | |
576 | ||
e2c91d4d | 577 | mutex_lock(&mdev->graph_mutex); |
665faa97 | 578 | |
ba0dd729 MCC |
579 | ret = ida_get_new_above(&mdev->entity_internal_idx, 1, |
580 | &entity->internal_idx); | |
581 | if (ret < 0) { | |
e2c91d4d | 582 | mutex_unlock(&mdev->graph_mutex); |
ba0dd729 | 583 | return ret; |
665faa97 SA |
584 | } |
585 | ||
586 | mdev->entity_internal_idx_max = | |
587 | max(mdev->entity_internal_idx_max, entity->internal_idx); | |
588 | ||
b2ed8af9 MCC |
589 | /* Initialize media_gobj embedded at the entity */ |
590 | media_gobj_create(mdev, MEDIA_GRAPH_ENTITY, &entity->graph_obj); | |
591 | ||
592 | /* Initialize objects at the pads */ | |
593 | for (i = 0; i < entity->num_pads; i++) | |
594 | media_gobj_create(mdev, MEDIA_GRAPH_PAD, | |
595 | &entity->pads[i].graph_obj); | |
596 | ||
afcbdb55 SK |
597 | /* invoke entity_notify callbacks */ |
598 | list_for_each_entry_safe(notify, next, &mdev->entity_notify, list) { | |
599 | (notify)->notify(entity, notify->notify_data); | |
600 | } | |
601 | ||
0c426c47 SA |
602 | if (mdev->entity_internal_idx_max |
603 | >= mdev->pm_count_walk.ent_enum.idx_max) { | |
604 | struct media_entity_graph new = { .top = 0 }; | |
605 | ||
606 | /* | |
607 | * Initialise the new graph walk before cleaning up | |
608 | * the old one in order not to spoil the graph walk | |
609 | * object of the media device if graph walk init fails. | |
610 | */ | |
611 | ret = media_entity_graph_walk_init(&new, mdev); | |
612 | if (ret) { | |
613 | mutex_unlock(&mdev->graph_mutex); | |
614 | return ret; | |
615 | } | |
616 | media_entity_graph_walk_cleanup(&mdev->pm_count_walk); | |
617 | mdev->pm_count_walk = new; | |
618 | } | |
619 | mutex_unlock(&mdev->graph_mutex); | |
620 | ||
b2ed8af9 MCC |
621 | return 0; |
622 | } | |
623 | EXPORT_SYMBOL_GPL(media_device_register_entity); | |
624 | ||
821ed366 | 625 | static void __media_device_unregister_entity(struct media_entity *entity) |
b2ed8af9 MCC |
626 | { |
627 | struct media_device *mdev = entity->graph_obj.mdev; | |
628 | struct media_link *link, *tmp; | |
629 | struct media_interface *intf; | |
630 | unsigned int i; | |
631 | ||
665faa97 SA |
632 | ida_simple_remove(&mdev->entity_internal_idx, entity->internal_idx); |
633 | ||
b2ed8af9 MCC |
634 | /* Remove all interface links pointing to this entity */ |
635 | list_for_each_entry(intf, &mdev->interfaces, graph_obj.list) { | |
636 | list_for_each_entry_safe(link, tmp, &intf->links, list) { | |
637 | if (link->entity == entity) | |
638 | __media_remove_intf_link(link); | |
639 | } | |
640 | } | |
641 | ||
642 | /* Remove all data links that belong to this entity */ | |
643 | __media_entity_remove_links(entity); | |
644 | ||
645 | /* Remove all pads that belong to this entity */ | |
646 | for (i = 0; i < entity->num_pads; i++) | |
647 | media_gobj_destroy(&entity->pads[i].graph_obj); | |
648 | ||
649 | /* Remove the entity */ | |
650 | media_gobj_destroy(&entity->graph_obj); | |
651 | ||
afcbdb55 SK |
652 | /* invoke entity_notify callbacks to handle entity removal?? */ |
653 | ||
b2ed8af9 MCC |
654 | entity->graph_obj.mdev = NULL; |
655 | } | |
821ed366 MCC |
656 | |
657 | void media_device_unregister_entity(struct media_entity *entity) | |
658 | { | |
659 | struct media_device *mdev = entity->graph_obj.mdev; | |
660 | ||
661 | if (mdev == NULL) | |
662 | return; | |
663 | ||
e2c91d4d | 664 | mutex_lock(&mdev->graph_mutex); |
821ed366 | 665 | __media_device_unregister_entity(entity); |
e2c91d4d | 666 | mutex_unlock(&mdev->graph_mutex); |
821ed366 | 667 | } |
b2ed8af9 MCC |
668 | EXPORT_SYMBOL_GPL(media_device_unregister_entity); |
669 | ||
176fb0d1 | 670 | /** |
9832e155 | 671 | * media_device_init() - initialize a media device |
176fb0d1 LP |
672 | * @mdev: The media device |
673 | * | |
674 | * The caller is responsible for initializing the media device before | |
675 | * registration. The following fields must be set: | |
676 | * | |
677 | * - dev must point to the parent device | |
678 | * - model must be filled with the device model name | |
679 | */ | |
9832e155 | 680 | void media_device_init(struct media_device *mdev) |
176fb0d1 | 681 | { |
53e269c1 | 682 | INIT_LIST_HEAD(&mdev->entities); |
57cf79b7 | 683 | INIT_LIST_HEAD(&mdev->interfaces); |
9155d859 MCC |
684 | INIT_LIST_HEAD(&mdev->pads); |
685 | INIT_LIST_HEAD(&mdev->links); | |
afcbdb55 | 686 | INIT_LIST_HEAD(&mdev->entity_notify); |
503c3d82 | 687 | mutex_init(&mdev->graph_mutex); |
665faa97 | 688 | ida_init(&mdev->entity_internal_idx); |
53e269c1 | 689 | |
9832e155 JMC |
690 | dev_dbg(mdev->dev, "Media device initialized\n"); |
691 | } | |
692 | EXPORT_SYMBOL_GPL(media_device_init); | |
693 | ||
9832e155 JMC |
694 | void media_device_cleanup(struct media_device *mdev) |
695 | { | |
665faa97 SA |
696 | ida_destroy(&mdev->entity_internal_idx); |
697 | mdev->entity_internal_idx_max = 0; | |
0c426c47 | 698 | media_entity_graph_walk_cleanup(&mdev->pm_count_walk); |
9832e155 JMC |
699 | mutex_destroy(&mdev->graph_mutex); |
700 | } | |
701 | EXPORT_SYMBOL_GPL(media_device_cleanup); | |
702 | ||
9832e155 JMC |
703 | int __must_check __media_device_register(struct media_device *mdev, |
704 | struct module *owner) | |
705 | { | |
a087ce70 | 706 | struct media_devnode *devnode; |
9832e155 JMC |
707 | int ret; |
708 | ||
a087ce70 MCC |
709 | devnode = kzalloc(sizeof(*devnode), GFP_KERNEL); |
710 | if (!devnode) | |
711 | return -ENOMEM; | |
712 | ||
176fb0d1 | 713 | /* Register the device node. */ |
a087ce70 MCC |
714 | mdev->devnode = devnode; |
715 | devnode->fops = &media_device_fops; | |
716 | devnode->parent = mdev->dev; | |
717 | devnode->release = media_device_release; | |
8a950796 JMC |
718 | |
719 | /* Set version 0 to indicate user-space that the graph is static */ | |
720 | mdev->topology_version = 0; | |
721 | ||
a087ce70 MCC |
722 | ret = media_devnode_register(mdev, devnode, owner); |
723 | if (ret < 0) { | |
5b28dde5 | 724 | /* devnode free is handled in media_devnode_*() */ |
a087ce70 | 725 | mdev->devnode = NULL; |
176fb0d1 | 726 | return ret; |
a087ce70 | 727 | } |
176fb0d1 | 728 | |
a087ce70 | 729 | ret = device_create_file(&devnode->dev, &dev_attr_model); |
176fb0d1 | 730 | if (ret < 0) { |
5b28dde5 | 731 | /* devnode free is handled in media_devnode_*() */ |
a087ce70 | 732 | mdev->devnode = NULL; |
6f0dd24a | 733 | media_devnode_unregister_prepare(devnode); |
a087ce70 | 734 | media_devnode_unregister(devnode); |
176fb0d1 LP |
735 | return ret; |
736 | } | |
737 | ||
8f5a3188 MCC |
738 | dev_dbg(mdev->dev, "Media device registered\n"); |
739 | ||
176fb0d1 LP |
740 | return 0; |
741 | } | |
85de721c | 742 | EXPORT_SYMBOL_GPL(__media_device_register); |
176fb0d1 | 743 | |
afcbdb55 SK |
744 | int __must_check media_device_register_entity_notify(struct media_device *mdev, |
745 | struct media_entity_notify *nptr) | |
746 | { | |
e2c91d4d | 747 | mutex_lock(&mdev->graph_mutex); |
afcbdb55 | 748 | list_add_tail(&nptr->list, &mdev->entity_notify); |
e2c91d4d | 749 | mutex_unlock(&mdev->graph_mutex); |
afcbdb55 SK |
750 | return 0; |
751 | } | |
752 | EXPORT_SYMBOL_GPL(media_device_register_entity_notify); | |
753 | ||
754 | /* | |
755 | * Note: Should be called with mdev->lock held. | |
756 | */ | |
757 | static void __media_device_unregister_entity_notify(struct media_device *mdev, | |
758 | struct media_entity_notify *nptr) | |
759 | { | |
760 | list_del(&nptr->list); | |
761 | } | |
762 | ||
763 | void media_device_unregister_entity_notify(struct media_device *mdev, | |
764 | struct media_entity_notify *nptr) | |
765 | { | |
e2c91d4d | 766 | mutex_lock(&mdev->graph_mutex); |
afcbdb55 | 767 | __media_device_unregister_entity_notify(mdev, nptr); |
e2c91d4d | 768 | mutex_unlock(&mdev->graph_mutex); |
afcbdb55 SK |
769 | } |
770 | EXPORT_SYMBOL_GPL(media_device_unregister_entity_notify); | |
771 | ||
176fb0d1 LP |
772 | void media_device_unregister(struct media_device *mdev) |
773 | { | |
53e269c1 LP |
774 | struct media_entity *entity; |
775 | struct media_entity *next; | |
d47109fa | 776 | struct media_interface *intf, *tmp_intf; |
afcbdb55 | 777 | struct media_entity_notify *notify, *nextp; |
d47109fa | 778 | |
821ed366 MCC |
779 | if (mdev == NULL) |
780 | return; | |
781 | ||
e2c91d4d | 782 | mutex_lock(&mdev->graph_mutex); |
821ed366 | 783 | |
223d19c5 | 784 | /* Check if mdev was ever registered at all */ |
a087ce70 | 785 | if (!media_devnode_is_registered(mdev->devnode)) { |
e2c91d4d | 786 | mutex_unlock(&mdev->graph_mutex); |
223d19c5 | 787 | return; |
821ed366 | 788 | } |
223d19c5 | 789 | |
6f0dd24a SK |
790 | /* Clear the devnode register bit to avoid races with media dev open */ |
791 | media_devnode_unregister_prepare(mdev->devnode); | |
792 | ||
f50d5166 MCC |
793 | /* Remove all entities from the media device */ |
794 | list_for_each_entry_safe(entity, next, &mdev->entities, graph_obj.list) | |
821ed366 | 795 | __media_device_unregister_entity(entity); |
f50d5166 | 796 | |
afcbdb55 SK |
797 | /* Remove all entity_notify callbacks from the media device */ |
798 | list_for_each_entry_safe(notify, nextp, &mdev->entity_notify, list) | |
799 | __media_device_unregister_entity_notify(mdev, notify); | |
800 | ||
d47109fa | 801 | /* Remove all interfaces from the media device */ |
d47109fa MCC |
802 | list_for_each_entry_safe(intf, tmp_intf, &mdev->interfaces, |
803 | graph_obj.list) { | |
804 | __media_remove_intf_links(intf); | |
c350ef83 | 805 | media_gobj_destroy(&intf->graph_obj); |
d47109fa MCC |
806 | kfree(intf); |
807 | } | |
821ed366 | 808 | |
e2c91d4d | 809 | mutex_unlock(&mdev->graph_mutex); |
53e269c1 | 810 | |
a087ce70 MCC |
811 | dev_dbg(mdev->dev, "Media device unregistered\n"); |
812 | ||
6f0dd24a SK |
813 | device_remove_file(&mdev->devnode->dev, &dev_attr_model); |
814 | media_devnode_unregister(mdev->devnode); | |
815 | /* devnode free is handled in media_devnode_*() */ | |
816 | mdev->devnode = NULL; | |
176fb0d1 LP |
817 | } |
818 | EXPORT_SYMBOL_GPL(media_device_unregister); | |
53e269c1 | 819 | |
d062f911 SK |
820 | static void media_device_release_devres(struct device *dev, void *res) |
821 | { | |
822 | } | |
823 | ||
d062f911 SK |
824 | struct media_device *media_device_get_devres(struct device *dev) |
825 | { | |
826 | struct media_device *mdev; | |
827 | ||
828 | mdev = devres_find(dev, media_device_release_devres, NULL, NULL); | |
829 | if (mdev) | |
830 | return mdev; | |
831 | ||
832 | mdev = devres_alloc(media_device_release_devres, | |
833 | sizeof(struct media_device), GFP_KERNEL); | |
834 | if (!mdev) | |
835 | return NULL; | |
836 | return devres_get(dev, mdev, NULL, NULL); | |
837 | } | |
838 | EXPORT_SYMBOL_GPL(media_device_get_devres); | |
839 | ||
d062f911 SK |
840 | struct media_device *media_device_find_devres(struct device *dev) |
841 | { | |
842 | return devres_find(dev, media_device_release_devres, NULL, NULL); | |
843 | } | |
844 | EXPORT_SYMBOL_GPL(media_device_find_devres); | |
e576d60b | 845 | |
b34ecd5a | 846 | #if IS_ENABLED(CONFIG_PCI) |
6cf5dad1 MCC |
847 | void media_device_pci_init(struct media_device *mdev, |
848 | struct pci_dev *pci_dev, | |
849 | const char *name) | |
41b44e35 | 850 | { |
41b44e35 MCC |
851 | mdev->dev = &pci_dev->dev; |
852 | ||
853 | if (name) | |
854 | strlcpy(mdev->model, name, sizeof(mdev->model)); | |
855 | else | |
856 | strlcpy(mdev->model, pci_name(pci_dev), sizeof(mdev->model)); | |
857 | ||
858 | sprintf(mdev->bus_info, "PCI:%s", pci_name(pci_dev)); | |
859 | ||
860 | mdev->hw_revision = (pci_dev->subsystem_vendor << 16) | |
861 | | pci_dev->subsystem_device; | |
862 | ||
863 | mdev->driver_version = LINUX_VERSION_CODE; | |
864 | ||
865 | media_device_init(mdev); | |
41b44e35 MCC |
866 | } |
867 | EXPORT_SYMBOL_GPL(media_device_pci_init); | |
b34ecd5a | 868 | #endif |
41b44e35 | 869 | |
b34ecd5a | 870 | #if IS_ENABLED(CONFIG_USB) |
6cf5dad1 MCC |
871 | void __media_device_usb_init(struct media_device *mdev, |
872 | struct usb_device *udev, | |
873 | const char *board_name, | |
874 | const char *driver_name) | |
41b44e35 | 875 | { |
41b44e35 MCC |
876 | mdev->dev = &udev->dev; |
877 | ||
878 | if (driver_name) | |
879 | strlcpy(mdev->driver_name, driver_name, | |
880 | sizeof(mdev->driver_name)); | |
881 | ||
882 | if (board_name) | |
883 | strlcpy(mdev->model, board_name, sizeof(mdev->model)); | |
884 | else if (udev->product) | |
885 | strlcpy(mdev->model, udev->product, sizeof(mdev->model)); | |
886 | else | |
887 | strlcpy(mdev->model, "unknown model", sizeof(mdev->model)); | |
888 | if (udev->serial) | |
889 | strlcpy(mdev->serial, udev->serial, sizeof(mdev->serial)); | |
890 | usb_make_path(udev, mdev->bus_info, sizeof(mdev->bus_info)); | |
891 | mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice); | |
892 | mdev->driver_version = LINUX_VERSION_CODE; | |
893 | ||
894 | media_device_init(mdev); | |
41b44e35 MCC |
895 | } |
896 | EXPORT_SYMBOL_GPL(__media_device_usb_init); | |
b34ecd5a | 897 | #endif |
41b44e35 MCC |
898 | |
899 | ||
e576d60b | 900 | #endif /* CONFIG_MEDIA_CONTROLLER */ |