Commit | Line | Data |
---|---|---|
949619f3 DV |
1 | /* |
2 | * Copyright (c) 2016 Intel Corporation | |
3 | * | |
4 | * Permission to use, copy, modify, distribute, and sell this software and its | |
5 | * documentation for any purpose is hereby granted without fee, provided that | |
6 | * the above copyright notice appear in all copies and that both that copyright | |
7 | * notice and this permission notice appear in supporting documentation, and | |
8 | * that the name of the copyright holders not be used in advertising or | |
9 | * publicity pertaining to distribution of the software without specific, | |
10 | * written prior permission. The copyright holders make no representations | |
11 | * about the suitability of this software for any purpose. It is provided "as | |
12 | * is" without express or implied warranty. | |
13 | * | |
14 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
15 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
16 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
17 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
18 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
19 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE | |
20 | * OF THIS SOFTWARE. | |
21 | */ | |
22 | ||
23 | #include <linux/export.h> | |
24 | #include <drm/drmP.h> | |
25 | #include <drm/drm_mode_object.h> | |
0bfd4a01 | 26 | #include <drm/drm_atomic.h> |
949619f3 DV |
27 | |
28 | #include "drm_crtc_internal.h" | |
29 | ||
30 | /* | |
31 | * Internal function to assign a slot in the object idr and optionally | |
32 | * register the object into the idr. | |
33 | */ | |
2135ea7a TR |
34 | int __drm_mode_object_add(struct drm_device *dev, struct drm_mode_object *obj, |
35 | uint32_t obj_type, bool register_obj, | |
36 | void (*obj_free_cb)(struct kref *kref)) | |
949619f3 DV |
37 | { |
38 | int ret; | |
39 | ||
40 | mutex_lock(&dev->mode_config.idr_mutex); | |
41 | ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL); | |
42 | if (ret >= 0) { | |
43 | /* | |
44 | * Set up the object linking under the protection of the idr | |
45 | * lock so that other users can't see inconsistent state. | |
46 | */ | |
47 | obj->id = ret; | |
48 | obj->type = obj_type; | |
49 | if (obj_free_cb) { | |
50 | obj->free_cb = obj_free_cb; | |
51 | kref_init(&obj->refcount); | |
52 | } | |
53 | } | |
54 | mutex_unlock(&dev->mode_config.idr_mutex); | |
55 | ||
56 | return ret < 0 ? ret : 0; | |
57 | } | |
58 | ||
59 | /** | |
2135ea7a | 60 | * drm_mode_object_add - allocate a new modeset identifier |
949619f3 DV |
61 | * @dev: DRM device |
62 | * @obj: object pointer, used to generate unique ID | |
63 | * @obj_type: object type | |
64 | * | |
65 | * Create a unique identifier based on @ptr in @dev's identifier space. Used | |
2135ea7a | 66 | * for tracking modes, CRTCs and connectors. |
949619f3 DV |
67 | * |
68 | * Returns: | |
69 | * Zero on success, error code on failure. | |
70 | */ | |
2135ea7a | 71 | int drm_mode_object_add(struct drm_device *dev, |
949619f3 DV |
72 | struct drm_mode_object *obj, uint32_t obj_type) |
73 | { | |
2135ea7a | 74 | return __drm_mode_object_add(dev, obj, obj_type, true, NULL); |
949619f3 DV |
75 | } |
76 | ||
77 | void drm_mode_object_register(struct drm_device *dev, | |
78 | struct drm_mode_object *obj) | |
79 | { | |
80 | mutex_lock(&dev->mode_config.idr_mutex); | |
81 | idr_replace(&dev->mode_config.crtc_idr, obj, obj->id); | |
82 | mutex_unlock(&dev->mode_config.idr_mutex); | |
83 | } | |
84 | ||
85 | /** | |
86 | * drm_mode_object_unregister - free a modeset identifer | |
87 | * @dev: DRM device | |
88 | * @object: object to free | |
89 | * | |
90 | * Free @id from @dev's unique identifier pool. | |
91 | * This function can be called multiple times, and guards against | |
92 | * multiple removals. | |
93 | * These modeset identifiers are _not_ reference counted. Hence don't use this | |
94 | * for reference counted modeset objects like framebuffers. | |
95 | */ | |
96 | void drm_mode_object_unregister(struct drm_device *dev, | |
a2511a55 | 97 | struct drm_mode_object *object) |
949619f3 DV |
98 | { |
99 | mutex_lock(&dev->mode_config.idr_mutex); | |
100 | if (object->id) { | |
101 | idr_remove(&dev->mode_config.crtc_idr, object->id); | |
102 | object->id = 0; | |
103 | } | |
104 | mutex_unlock(&dev->mode_config.idr_mutex); | |
105 | } | |
106 | ||
7de440db KP |
107 | /** |
108 | * drm_lease_required - check types which must be leased to be used | |
109 | * @type: type of object | |
110 | * | |
111 | * Returns whether the provided type of drm_mode_object must | |
112 | * be owned or leased to be used by a process. | |
113 | */ | |
62884cd3 | 114 | bool drm_mode_object_lease_required(uint32_t type) |
7de440db KP |
115 | { |
116 | switch(type) { | |
117 | case DRM_MODE_OBJECT_CRTC: | |
118 | case DRM_MODE_OBJECT_CONNECTOR: | |
119 | case DRM_MODE_OBJECT_PLANE: | |
120 | return true; | |
121 | default: | |
122 | return false; | |
123 | } | |
124 | } | |
125 | ||
949619f3 | 126 | struct drm_mode_object *__drm_mode_object_find(struct drm_device *dev, |
418da172 | 127 | struct drm_file *file_priv, |
949619f3 DV |
128 | uint32_t id, uint32_t type) |
129 | { | |
130 | struct drm_mode_object *obj = NULL; | |
131 | ||
132 | mutex_lock(&dev->mode_config.idr_mutex); | |
133 | obj = idr_find(&dev->mode_config.crtc_idr, id); | |
134 | if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type) | |
135 | obj = NULL; | |
136 | if (obj && obj->id != id) | |
137 | obj = NULL; | |
138 | ||
62884cd3 KP |
139 | if (obj && drm_mode_object_lease_required(obj->type) && |
140 | !_drm_lease_held(file_priv, obj->id)) | |
7de440db KP |
141 | obj = NULL; |
142 | ||
949619f3 DV |
143 | if (obj && obj->free_cb) { |
144 | if (!kref_get_unless_zero(&obj->refcount)) | |
145 | obj = NULL; | |
146 | } | |
147 | mutex_unlock(&dev->mode_config.idr_mutex); | |
148 | ||
149 | return obj; | |
150 | } | |
151 | ||
152 | /** | |
153 | * drm_mode_object_find - look up a drm object with static lifetime | |
e7e62c7e | 154 | * @dev: drm device |
418da172 | 155 | * @file_priv: drm file |
949619f3 DV |
156 | * @id: id of the mode object |
157 | * @type: type of the mode object | |
158 | * | |
159 | * This function is used to look up a modeset object. It will acquire a | |
160 | * reference for reference counted objects. This reference must be dropped again | |
020a218f | 161 | * by callind drm_mode_object_put(). |
949619f3 DV |
162 | */ |
163 | struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, | |
418da172 | 164 | struct drm_file *file_priv, |
949619f3 DV |
165 | uint32_t id, uint32_t type) |
166 | { | |
167 | struct drm_mode_object *obj = NULL; | |
168 | ||
418da172 | 169 | obj = __drm_mode_object_find(dev, file_priv, id, type); |
949619f3 DV |
170 | return obj; |
171 | } | |
172 | EXPORT_SYMBOL(drm_mode_object_find); | |
173 | ||
174 | /** | |
020a218f TR |
175 | * drm_mode_object_put - release a mode object reference |
176 | * @obj: DRM mode object | |
949619f3 | 177 | * |
a2511a55 | 178 | * This function decrements the object's refcount if it is a refcounted modeset |
949619f3 | 179 | * object. It is a no-op on any other object. This is used to drop references |
020a218f | 180 | * acquired with drm_mode_object_get(). |
949619f3 | 181 | */ |
020a218f | 182 | void drm_mode_object_put(struct drm_mode_object *obj) |
949619f3 DV |
183 | { |
184 | if (obj->free_cb) { | |
2c935bc5 | 185 | DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, kref_read(&obj->refcount)); |
949619f3 DV |
186 | kref_put(&obj->refcount, obj->free_cb); |
187 | } | |
188 | } | |
020a218f | 189 | EXPORT_SYMBOL(drm_mode_object_put); |
949619f3 DV |
190 | |
191 | /** | |
020a218f TR |
192 | * drm_mode_object_get - acquire a mode object reference |
193 | * @obj: DRM mode object | |
949619f3 | 194 | * |
a2511a55 | 195 | * This function increments the object's refcount if it is a refcounted modeset |
949619f3 | 196 | * object. It is a no-op on any other object. References should be dropped again |
020a218f | 197 | * by calling drm_mode_object_put(). |
949619f3 | 198 | */ |
020a218f | 199 | void drm_mode_object_get(struct drm_mode_object *obj) |
949619f3 DV |
200 | { |
201 | if (obj->free_cb) { | |
2c935bc5 | 202 | DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, kref_read(&obj->refcount)); |
949619f3 DV |
203 | kref_get(&obj->refcount); |
204 | } | |
205 | } | |
020a218f | 206 | EXPORT_SYMBOL(drm_mode_object_get); |
949619f3 DV |
207 | |
208 | /** | |
209 | * drm_object_attach_property - attach a property to a modeset object | |
210 | * @obj: drm modeset object | |
211 | * @property: property to attach | |
212 | * @init_val: initial value of the property | |
213 | * | |
214 | * This attaches the given property to the modeset object with the given initial | |
215 | * value. Currently this function cannot fail since the properties are stored in | |
216 | * a statically sized array. | |
217 | */ | |
218 | void drm_object_attach_property(struct drm_mode_object *obj, | |
219 | struct drm_property *property, | |
220 | uint64_t init_val) | |
221 | { | |
222 | int count = obj->properties->count; | |
223 | ||
224 | if (count == DRM_OBJECT_MAX_PROPERTY) { | |
225 | WARN(1, "Failed to attach object property (type: 0x%x). Please " | |
226 | "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " | |
227 | "you see this message on the same object type.\n", | |
228 | obj->type); | |
229 | return; | |
230 | } | |
231 | ||
232 | obj->properties->properties[count] = property; | |
233 | obj->properties->values[count] = init_val; | |
234 | obj->properties->count++; | |
949619f3 DV |
235 | } |
236 | EXPORT_SYMBOL(drm_object_attach_property); | |
237 | ||
238 | /** | |
239 | * drm_object_property_set_value - set the value of a property | |
240 | * @obj: drm mode object to set property value for | |
241 | * @property: property to set | |
242 | * @val: value the property should be set to | |
243 | * | |
a2511a55 | 244 | * This function sets a given property on a given object. This function only |
949619f3 DV |
245 | * changes the software state of the property, it does not call into the |
246 | * driver's ->set_property callback. | |
247 | * | |
a2511a55 DV |
248 | * Note that atomic drivers should not have any need to call this, the core will |
249 | * ensure consistency of values reported back to userspace through the | |
250 | * appropriate ->atomic_get_property callback. Only legacy drivers should call | |
251 | * this function to update the tracked value (after clamping and other | |
252 | * restrictions have been applied). | |
253 | * | |
949619f3 DV |
254 | * Returns: |
255 | * Zero on success, error code on failure. | |
256 | */ | |
257 | int drm_object_property_set_value(struct drm_mode_object *obj, | |
258 | struct drm_property *property, uint64_t val) | |
259 | { | |
260 | int i; | |
261 | ||
4a97a3da DV |
262 | WARN_ON(drm_drv_uses_atomic_modeset(property->dev) && |
263 | !(property->flags & DRM_MODE_PROP_IMMUTABLE)); | |
264 | ||
949619f3 DV |
265 | for (i = 0; i < obj->properties->count; i++) { |
266 | if (obj->properties->properties[i] == property) { | |
267 | obj->properties->values[i] = val; | |
268 | return 0; | |
269 | } | |
270 | } | |
271 | ||
272 | return -EINVAL; | |
273 | } | |
274 | EXPORT_SYMBOL(drm_object_property_set_value); | |
275 | ||
8a50b9bd VS |
276 | static int __drm_object_property_get_value(struct drm_mode_object *obj, |
277 | struct drm_property *property, | |
278 | uint64_t *val) | |
949619f3 DV |
279 | { |
280 | int i; | |
281 | ||
282 | /* read-only properties bypass atomic mechanism and still store | |
283 | * their value in obj->properties->values[].. mostly to avoid | |
284 | * having to deal w/ EDID and similar props in atomic paths: | |
285 | */ | |
0bfd4a01 | 286 | if (drm_drv_uses_atomic_modeset(property->dev) && |
949619f3 DV |
287 | !(property->flags & DRM_MODE_PROP_IMMUTABLE)) |
288 | return drm_atomic_get_property(obj, property, val); | |
289 | ||
290 | for (i = 0; i < obj->properties->count; i++) { | |
291 | if (obj->properties->properties[i] == property) { | |
292 | *val = obj->properties->values[i]; | |
293 | return 0; | |
294 | } | |
295 | ||
296 | } | |
297 | ||
298 | return -EINVAL; | |
299 | } | |
4a97a3da DV |
300 | |
301 | /** | |
302 | * drm_object_property_get_value - retrieve the value of a property | |
303 | * @obj: drm mode object to get property value from | |
304 | * @property: property to retrieve | |
305 | * @val: storage for the property value | |
306 | * | |
307 | * This function retrieves the softare state of the given property for the given | |
308 | * property. Since there is no driver callback to retrieve the current property | |
309 | * value this might be out of sync with the hardware, depending upon the driver | |
310 | * and property. | |
311 | * | |
312 | * Atomic drivers should never call this function directly, the core will read | |
313 | * out property values through the various ->atomic_get_property callbacks. | |
314 | * | |
315 | * Returns: | |
316 | * Zero on success, error code on failure. | |
317 | */ | |
318 | int drm_object_property_get_value(struct drm_mode_object *obj, | |
319 | struct drm_property *property, uint64_t *val) | |
320 | { | |
321 | WARN_ON(drm_drv_uses_atomic_modeset(property->dev)); | |
322 | ||
323 | return __drm_object_property_get_value(obj, property, val); | |
324 | } | |
949619f3 DV |
325 | EXPORT_SYMBOL(drm_object_property_get_value); |
326 | ||
327 | /* helper for getconnector and getproperties ioctls */ | |
328 | int drm_mode_object_get_properties(struct drm_mode_object *obj, bool atomic, | |
329 | uint32_t __user *prop_ptr, | |
330 | uint64_t __user *prop_values, | |
331 | uint32_t *arg_count_props) | |
332 | { | |
f094d881 | 333 | int i, ret, count; |
949619f3 | 334 | |
f094d881 DV |
335 | for (i = 0, count = 0; i < obj->properties->count; i++) { |
336 | struct drm_property *prop = obj->properties->properties[i]; | |
337 | uint64_t val; | |
949619f3 | 338 | |
f094d881 DV |
339 | if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) |
340 | continue; | |
949619f3 | 341 | |
f094d881 | 342 | if (*arg_count_props > count) { |
4a97a3da | 343 | ret = __drm_object_property_get_value(obj, prop, &val); |
949619f3 DV |
344 | if (ret) |
345 | return ret; | |
346 | ||
f094d881 | 347 | if (put_user(prop->base.id, prop_ptr + count)) |
949619f3 DV |
348 | return -EFAULT; |
349 | ||
f094d881 | 350 | if (put_user(val, prop_values + count)) |
949619f3 | 351 | return -EFAULT; |
949619f3 | 352 | } |
f094d881 DV |
353 | |
354 | count++; | |
949619f3 | 355 | } |
f094d881 | 356 | *arg_count_props = count; |
949619f3 DV |
357 | |
358 | return 0; | |
359 | } | |
360 | ||
361 | /** | |
362 | * drm_mode_obj_get_properties_ioctl - get the current value of a object's property | |
363 | * @dev: DRM device | |
364 | * @data: ioctl data | |
365 | * @file_priv: DRM file info | |
366 | * | |
367 | * This function retrieves the current value for an object's property. Compared | |
368 | * to the connector specific ioctl this one is extended to also work on crtc and | |
369 | * plane objects. | |
370 | * | |
371 | * Called by the user via ioctl. | |
372 | * | |
373 | * Returns: | |
374 | * Zero on success, negative errno on failure. | |
375 | */ | |
376 | int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, | |
377 | struct drm_file *file_priv) | |
378 | { | |
379 | struct drm_mode_obj_get_properties *arg = data; | |
380 | struct drm_mode_object *obj; | |
381 | int ret = 0; | |
382 | ||
383 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |
69fdf420 | 384 | return -EOPNOTSUPP; |
949619f3 DV |
385 | |
386 | drm_modeset_lock_all(dev); | |
387 | ||
418da172 | 388 | obj = drm_mode_object_find(dev, file_priv, arg->obj_id, arg->obj_type); |
949619f3 DV |
389 | if (!obj) { |
390 | ret = -ENOENT; | |
391 | goto out; | |
392 | } | |
393 | if (!obj->properties) { | |
394 | ret = -EINVAL; | |
395 | goto out_unref; | |
396 | } | |
397 | ||
398 | ret = drm_mode_object_get_properties(obj, file_priv->atomic, | |
399 | (uint32_t __user *)(unsigned long)(arg->props_ptr), | |
400 | (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), | |
401 | &arg->count_props); | |
402 | ||
403 | out_unref: | |
020a218f | 404 | drm_mode_object_put(obj); |
949619f3 DV |
405 | out: |
406 | drm_modeset_unlock_all(dev); | |
407 | return ret; | |
408 | } | |
409 | ||
f92f053b ML |
410 | struct drm_property *drm_mode_obj_find_prop_id(struct drm_mode_object *obj, |
411 | uint32_t prop_id) | |
412 | { | |
413 | int i; | |
414 | ||
415 | for (i = 0; i < obj->properties->count; i++) | |
416 | if (obj->properties->properties[i]->base.id == prop_id) | |
417 | return obj->properties->properties[i]; | |
418 | ||
419 | return NULL; | |
420 | } | |
421 | ||
144a7999 DV |
422 | static int set_property_legacy(struct drm_mode_object *obj, |
423 | struct drm_property *prop, | |
424 | uint64_t prop_value) | |
425 | { | |
426 | struct drm_device *dev = prop->dev; | |
427 | struct drm_mode_object *ref; | |
428 | int ret = -EINVAL; | |
429 | ||
430 | if (!drm_property_change_valid_get(prop, prop_value, &ref)) | |
431 | return -EINVAL; | |
432 | ||
433 | drm_modeset_lock_all(dev); | |
434 | switch (obj->type) { | |
435 | case DRM_MODE_OBJECT_CONNECTOR: | |
97e14fbe | 436 | ret = drm_connector_set_obj_prop(obj, prop, prop_value); |
144a7999 DV |
437 | break; |
438 | case DRM_MODE_OBJECT_CRTC: | |
439 | ret = drm_mode_crtc_set_obj_prop(obj, prop, prop_value); | |
440 | break; | |
441 | case DRM_MODE_OBJECT_PLANE: | |
442 | ret = drm_mode_plane_set_obj_prop(obj_to_plane(obj), | |
443 | prop, prop_value); | |
444 | break; | |
445 | } | |
446 | drm_property_change_valid_put(prop, ref); | |
447 | drm_modeset_unlock_all(dev); | |
448 | ||
449 | return ret; | |
450 | } | |
451 | ||
452 | static int set_property_atomic(struct drm_mode_object *obj, | |
453 | struct drm_property *prop, | |
454 | uint64_t prop_value) | |
455 | { | |
456 | struct drm_device *dev = prop->dev; | |
457 | struct drm_atomic_state *state; | |
458 | struct drm_modeset_acquire_ctx ctx; | |
459 | int ret; | |
460 | ||
461 | drm_modeset_acquire_init(&ctx, 0); | |
462 | ||
463 | state = drm_atomic_state_alloc(dev); | |
464 | if (!state) | |
465 | return -ENOMEM; | |
466 | state->acquire_ctx = &ctx; | |
467 | retry: | |
468 | if (prop == state->dev->mode_config.dpms_property) { | |
469 | if (obj->type != DRM_MODE_OBJECT_CONNECTOR) { | |
470 | ret = -EINVAL; | |
471 | goto out; | |
472 | } | |
473 | ||
474 | ret = drm_atomic_connector_commit_dpms(state, | |
475 | obj_to_connector(obj), | |
476 | prop_value); | |
477 | } else { | |
478 | ret = drm_atomic_set_property(state, obj, prop, prop_value); | |
479 | if (ret) | |
480 | goto out; | |
481 | ret = drm_atomic_commit(state); | |
482 | } | |
483 | out: | |
484 | if (ret == -EDEADLK) { | |
485 | drm_atomic_state_clear(state); | |
486 | drm_modeset_backoff(&ctx); | |
487 | goto retry; | |
488 | } | |
489 | ||
490 | drm_atomic_state_put(state); | |
491 | ||
492 | drm_modeset_drop_locks(&ctx); | |
493 | drm_modeset_acquire_fini(&ctx); | |
494 | ||
495 | return ret; | |
496 | } | |
497 | ||
949619f3 DV |
498 | int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, |
499 | struct drm_file *file_priv) | |
500 | { | |
501 | struct drm_mode_obj_set_property *arg = data; | |
502 | struct drm_mode_object *arg_obj; | |
949619f3 | 503 | struct drm_property *property; |
f92f053b | 504 | int ret = -EINVAL; |
949619f3 DV |
505 | |
506 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |
69fdf420 | 507 | return -EOPNOTSUPP; |
949619f3 | 508 | |
418da172 | 509 | arg_obj = drm_mode_object_find(dev, file_priv, arg->obj_id, arg->obj_type); |
144a7999 DV |
510 | if (!arg_obj) |
511 | return -ENOENT; | |
949619f3 | 512 | |
f92f053b | 513 | if (!arg_obj->properties) |
949619f3 DV |
514 | goto out_unref; |
515 | ||
f92f053b ML |
516 | property = drm_mode_obj_find_prop_id(arg_obj, arg->prop_id); |
517 | if (!property) | |
949619f3 | 518 | goto out_unref; |
949619f3 | 519 | |
144a7999 DV |
520 | if (drm_drv_uses_atomic_modeset(property->dev)) |
521 | ret = set_property_atomic(arg_obj, property, arg->value); | |
522 | else | |
523 | ret = set_property_legacy(arg_obj, property, arg->value); | |
949619f3 DV |
524 | |
525 | out_unref: | |
020a218f | 526 | drm_mode_object_put(arg_obj); |
949619f3 DV |
527 | return ret; |
528 | } |