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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>
26#include <drm/drm_atomic.h>
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 */
34int __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))
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/**
60 * drm_mode_object_add - allocate a new modeset identifier
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
66 * for tracking modes, CRTCs and connectors.
67 *
68 * Returns:
69 * Zero on success, error code on failure.
70 */
71int drm_mode_object_add(struct drm_device *dev,
72 struct drm_mode_object *obj, uint32_t obj_type)
73{
74 return __drm_mode_object_add(dev, obj, obj_type, true, NULL);
75}
76
77void 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 */
96void drm_mode_object_unregister(struct drm_device *dev,
97 struct drm_mode_object *object)
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
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 */
114bool drm_mode_object_lease_required(uint32_t type)
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
126struct drm_mode_object *__drm_mode_object_find(struct drm_device *dev,
127 struct drm_file *file_priv,
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
139 if (obj && drm_mode_object_lease_required(obj->type) &&
140 !_drm_lease_held(file_priv, obj->id))
141 obj = NULL;
142
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
154 * @dev: drm device
155 * @file_priv: drm file
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
161 * by callind drm_mode_object_put().
162 */
163struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
164 struct drm_file *file_priv,
165 uint32_t id, uint32_t type)
166{
167 struct drm_mode_object *obj = NULL;
168
169 obj = __drm_mode_object_find(dev, file_priv, id, type);
170 return obj;
171}
172EXPORT_SYMBOL(drm_mode_object_find);
173
174/**
175 * drm_mode_object_put - release a mode object reference
176 * @obj: DRM mode object
177 *
178 * This function decrements the object's refcount if it is a refcounted modeset
179 * object. It is a no-op on any other object. This is used to drop references
180 * acquired with drm_mode_object_get().
181 */
182void drm_mode_object_put(struct drm_mode_object *obj)
183{
184 if (obj->free_cb) {
185 DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, kref_read(&obj->refcount));
186 kref_put(&obj->refcount, obj->free_cb);
187 }
188}
189EXPORT_SYMBOL(drm_mode_object_put);
190
191/**
192 * drm_mode_object_get - acquire a mode object reference
193 * @obj: DRM mode object
194 *
195 * This function increments the object's refcount if it is a refcounted modeset
196 * object. It is a no-op on any other object. References should be dropped again
197 * by calling drm_mode_object_put().
198 */
199void drm_mode_object_get(struct drm_mode_object *obj)
200{
201 if (obj->free_cb) {
202 DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, kref_read(&obj->refcount));
203 kref_get(&obj->refcount);
204 }
205}
206EXPORT_SYMBOL(drm_mode_object_get);
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 */
218void 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++;
235}
236EXPORT_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 *
244 * This function sets a given property on a given object. This function only
245 * changes the software state of the property, it does not call into the
246 * driver's ->set_property callback.
247 *
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 *
254 * Returns:
255 * Zero on success, error code on failure.
256 */
257int drm_object_property_set_value(struct drm_mode_object *obj,
258 struct drm_property *property, uint64_t val)
259{
260 int i;
261
262 WARN_ON(drm_drv_uses_atomic_modeset(property->dev) &&
263 !(property->flags & DRM_MODE_PROP_IMMUTABLE));
264
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}
274EXPORT_SYMBOL(drm_object_property_set_value);
275
276static int __drm_object_property_get_value(struct drm_mode_object *obj,
277 struct drm_property *property,
278 uint64_t *val)
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 */
286 if (drm_drv_uses_atomic_modeset(property->dev) &&
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}
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 */
318int 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}
325EXPORT_SYMBOL(drm_object_property_get_value);
326
327/* helper for getconnector and getproperties ioctls */
328int 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{
333 int i, ret, count;
334
335 for (i = 0, count = 0; i < obj->properties->count; i++) {
336 struct drm_property *prop = obj->properties->properties[i];
337 uint64_t val;
338
339 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic)
340 continue;
341
342 if (*arg_count_props > count) {
343 ret = __drm_object_property_get_value(obj, prop, &val);
344 if (ret)
345 return ret;
346
347 if (put_user(prop->base.id, prop_ptr + count))
348 return -EFAULT;
349
350 if (put_user(val, prop_values + count))
351 return -EFAULT;
352 }
353
354 count++;
355 }
356 *arg_count_props = count;
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 */
376int 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))
384 return -EINVAL;
385
386 drm_modeset_lock_all(dev);
387
388 obj = drm_mode_object_find(dev, file_priv, arg->obj_id, arg->obj_type);
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
403out_unref:
404 drm_mode_object_put(obj);
405out:
406 drm_modeset_unlock_all(dev);
407 return ret;
408}
409
410struct 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
422static 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:
436 ret = drm_mode_connector_set_obj_prop(obj, prop,
437 prop_value);
438 break;
439 case DRM_MODE_OBJECT_CRTC:
440 ret = drm_mode_crtc_set_obj_prop(obj, prop, prop_value);
441 break;
442 case DRM_MODE_OBJECT_PLANE:
443 ret = drm_mode_plane_set_obj_prop(obj_to_plane(obj),
444 prop, prop_value);
445 break;
446 }
447 drm_property_change_valid_put(prop, ref);
448 drm_modeset_unlock_all(dev);
449
450 return ret;
451}
452
453static int set_property_atomic(struct drm_mode_object *obj,
454 struct drm_property *prop,
455 uint64_t prop_value)
456{
457 struct drm_device *dev = prop->dev;
458 struct drm_atomic_state *state;
459 struct drm_modeset_acquire_ctx ctx;
460 int ret;
461
462 drm_modeset_acquire_init(&ctx, 0);
463
464 state = drm_atomic_state_alloc(dev);
465 if (!state)
466 return -ENOMEM;
467 state->acquire_ctx = &ctx;
468retry:
469 if (prop == state->dev->mode_config.dpms_property) {
470 if (obj->type != DRM_MODE_OBJECT_CONNECTOR) {
471 ret = -EINVAL;
472 goto out;
473 }
474
475 ret = drm_atomic_connector_commit_dpms(state,
476 obj_to_connector(obj),
477 prop_value);
478 } else {
479 ret = drm_atomic_set_property(state, obj, prop, prop_value);
480 if (ret)
481 goto out;
482 ret = drm_atomic_commit(state);
483 }
484out:
485 if (ret == -EDEADLK) {
486 drm_atomic_state_clear(state);
487 drm_modeset_backoff(&ctx);
488 goto retry;
489 }
490
491 drm_atomic_state_put(state);
492
493 drm_modeset_drop_locks(&ctx);
494 drm_modeset_acquire_fini(&ctx);
495
496 return ret;
497}
498
499int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
500 struct drm_file *file_priv)
501{
502 struct drm_mode_obj_set_property *arg = data;
503 struct drm_mode_object *arg_obj;
504 struct drm_property *property;
505 int ret = -EINVAL;
506
507 if (!drm_core_check_feature(dev, DRIVER_MODESET))
508 return -EINVAL;
509
510 arg_obj = drm_mode_object_find(dev, file_priv, arg->obj_id, arg->obj_type);
511 if (!arg_obj)
512 return -ENOENT;
513
514 if (!arg_obj->properties)
515 goto out_unref;
516
517 property = drm_mode_obj_find_prop_id(arg_obj, arg->prop_id);
518 if (!property)
519 goto out_unref;
520
521 if (drm_drv_uses_atomic_modeset(property->dev))
522 ret = set_property_atomic(arg_obj, property, arg->value);
523 else
524 ret = set_property_legacy(arg_obj, property, arg->value);
525
526out_unref:
527 drm_mode_object_put(arg_obj);
528 return ret;
529}
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>
26
27#include "drm_crtc_internal.h"
28
29/*
30 * Internal function to assign a slot in the object idr and optionally
31 * register the object into the idr.
32 */
33int drm_mode_object_get_reg(struct drm_device *dev,
34 struct drm_mode_object *obj,
35 uint32_t obj_type,
36 bool register_obj,
37 void (*obj_free_cb)(struct kref *kref))
38{
39 int ret;
40
41 mutex_lock(&dev->mode_config.idr_mutex);
42 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL);
43 if (ret >= 0) {
44 /*
45 * Set up the object linking under the protection of the idr
46 * lock so that other users can't see inconsistent state.
47 */
48 obj->id = ret;
49 obj->type = obj_type;
50 if (obj_free_cb) {
51 obj->free_cb = obj_free_cb;
52 kref_init(&obj->refcount);
53 }
54 }
55 mutex_unlock(&dev->mode_config.idr_mutex);
56
57 return ret < 0 ? ret : 0;
58}
59
60/**
61 * drm_mode_object_get - allocate a new modeset identifier
62 * @dev: DRM device
63 * @obj: object pointer, used to generate unique ID
64 * @obj_type: object type
65 *
66 * Create a unique identifier based on @ptr in @dev's identifier space. Used
67 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix
68 * modeset identifiers are _not_ reference counted. Hence don't use this for
69 * reference counted modeset objects like framebuffers.
70 *
71 * Returns:
72 * Zero on success, error code on failure.
73 */
74int drm_mode_object_get(struct drm_device *dev,
75 struct drm_mode_object *obj, uint32_t obj_type)
76{
77 return drm_mode_object_get_reg(dev, obj, obj_type, true, NULL);
78}
79
80void drm_mode_object_register(struct drm_device *dev,
81 struct drm_mode_object *obj)
82{
83 mutex_lock(&dev->mode_config.idr_mutex);
84 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id);
85 mutex_unlock(&dev->mode_config.idr_mutex);
86}
87
88/**
89 * drm_mode_object_unregister - free a modeset identifer
90 * @dev: DRM device
91 * @object: object to free
92 *
93 * Free @id from @dev's unique identifier pool.
94 * This function can be called multiple times, and guards against
95 * multiple removals.
96 * These modeset identifiers are _not_ reference counted. Hence don't use this
97 * for reference counted modeset objects like framebuffers.
98 */
99void drm_mode_object_unregister(struct drm_device *dev,
100 struct drm_mode_object *object)
101{
102 mutex_lock(&dev->mode_config.idr_mutex);
103 if (object->id) {
104 idr_remove(&dev->mode_config.crtc_idr, object->id);
105 object->id = 0;
106 }
107 mutex_unlock(&dev->mode_config.idr_mutex);
108}
109
110struct drm_mode_object *__drm_mode_object_find(struct drm_device *dev,
111 uint32_t id, uint32_t type)
112{
113 struct drm_mode_object *obj = NULL;
114
115 mutex_lock(&dev->mode_config.idr_mutex);
116 obj = idr_find(&dev->mode_config.crtc_idr, id);
117 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type)
118 obj = NULL;
119 if (obj && obj->id != id)
120 obj = NULL;
121
122 if (obj && obj->free_cb) {
123 if (!kref_get_unless_zero(&obj->refcount))
124 obj = NULL;
125 }
126 mutex_unlock(&dev->mode_config.idr_mutex);
127
128 return obj;
129}
130
131/**
132 * drm_mode_object_find - look up a drm object with static lifetime
133 * @dev: drm device
134 * @id: id of the mode object
135 * @type: type of the mode object
136 *
137 * This function is used to look up a modeset object. It will acquire a
138 * reference for reference counted objects. This reference must be dropped again
139 * by callind drm_mode_object_unreference().
140 */
141struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
142 uint32_t id, uint32_t type)
143{
144 struct drm_mode_object *obj = NULL;
145
146 obj = __drm_mode_object_find(dev, id, type);
147 return obj;
148}
149EXPORT_SYMBOL(drm_mode_object_find);
150
151/**
152 * drm_mode_object_unreference - decr the object refcnt
153 * @obj: mode_object
154 *
155 * This function decrements the object's refcount if it is a refcounted modeset
156 * object. It is a no-op on any other object. This is used to drop references
157 * acquired with drm_mode_object_reference().
158 */
159void drm_mode_object_unreference(struct drm_mode_object *obj)
160{
161 if (obj->free_cb) {
162 DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, atomic_read(&obj->refcount.refcount));
163 kref_put(&obj->refcount, obj->free_cb);
164 }
165}
166EXPORT_SYMBOL(drm_mode_object_unreference);
167
168/**
169 * drm_mode_object_reference - incr the object refcnt
170 * @obj: mode_object
171 *
172 * This function increments the object's refcount if it is a refcounted modeset
173 * object. It is a no-op on any other object. References should be dropped again
174 * by calling drm_mode_object_unreference().
175 */
176void drm_mode_object_reference(struct drm_mode_object *obj)
177{
178 if (obj->free_cb) {
179 DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, atomic_read(&obj->refcount.refcount));
180 kref_get(&obj->refcount);
181 }
182}
183EXPORT_SYMBOL(drm_mode_object_reference);
184
185/**
186 * drm_object_attach_property - attach a property to a modeset object
187 * @obj: drm modeset object
188 * @property: property to attach
189 * @init_val: initial value of the property
190 *
191 * This attaches the given property to the modeset object with the given initial
192 * value. Currently this function cannot fail since the properties are stored in
193 * a statically sized array.
194 */
195void drm_object_attach_property(struct drm_mode_object *obj,
196 struct drm_property *property,
197 uint64_t init_val)
198{
199 int count = obj->properties->count;
200
201 if (count == DRM_OBJECT_MAX_PROPERTY) {
202 WARN(1, "Failed to attach object property (type: 0x%x). Please "
203 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time "
204 "you see this message on the same object type.\n",
205 obj->type);
206 return;
207 }
208
209 obj->properties->properties[count] = property;
210 obj->properties->values[count] = init_val;
211 obj->properties->count++;
212}
213EXPORT_SYMBOL(drm_object_attach_property);
214
215/**
216 * drm_object_property_set_value - set the value of a property
217 * @obj: drm mode object to set property value for
218 * @property: property to set
219 * @val: value the property should be set to
220 *
221 * This function sets a given property on a given object. This function only
222 * changes the software state of the property, it does not call into the
223 * driver's ->set_property callback.
224 *
225 * Note that atomic drivers should not have any need to call this, the core will
226 * ensure consistency of values reported back to userspace through the
227 * appropriate ->atomic_get_property callback. Only legacy drivers should call
228 * this function to update the tracked value (after clamping and other
229 * restrictions have been applied).
230 *
231 * Returns:
232 * Zero on success, error code on failure.
233 */
234int drm_object_property_set_value(struct drm_mode_object *obj,
235 struct drm_property *property, uint64_t val)
236{
237 int i;
238
239 for (i = 0; i < obj->properties->count; i++) {
240 if (obj->properties->properties[i] == property) {
241 obj->properties->values[i] = val;
242 return 0;
243 }
244 }
245
246 return -EINVAL;
247}
248EXPORT_SYMBOL(drm_object_property_set_value);
249
250/**
251 * drm_object_property_get_value - retrieve the value of a property
252 * @obj: drm mode object to get property value from
253 * @property: property to retrieve
254 * @val: storage for the property value
255 *
256 * This function retrieves the softare state of the given property for the given
257 * property. Since there is no driver callback to retrieve the current property
258 * value this might be out of sync with the hardware, depending upon the driver
259 * and property.
260 *
261 * Atomic drivers should never call this function directly, the core will read
262 * out property values through the various ->atomic_get_property callbacks.
263 *
264 * Returns:
265 * Zero on success, error code on failure.
266 */
267int drm_object_property_get_value(struct drm_mode_object *obj,
268 struct drm_property *property, uint64_t *val)
269{
270 int i;
271
272 /* read-only properties bypass atomic mechanism and still store
273 * their value in obj->properties->values[].. mostly to avoid
274 * having to deal w/ EDID and similar props in atomic paths:
275 */
276 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) &&
277 !(property->flags & DRM_MODE_PROP_IMMUTABLE))
278 return drm_atomic_get_property(obj, property, val);
279
280 for (i = 0; i < obj->properties->count; i++) {
281 if (obj->properties->properties[i] == property) {
282 *val = obj->properties->values[i];
283 return 0;
284 }
285
286 }
287
288 return -EINVAL;
289}
290EXPORT_SYMBOL(drm_object_property_get_value);
291
292/* helper for getconnector and getproperties ioctls */
293int drm_mode_object_get_properties(struct drm_mode_object *obj, bool atomic,
294 uint32_t __user *prop_ptr,
295 uint64_t __user *prop_values,
296 uint32_t *arg_count_props)
297{
298 int i, ret, count;
299
300 for (i = 0, count = 0; i < obj->properties->count; i++) {
301 struct drm_property *prop = obj->properties->properties[i];
302 uint64_t val;
303
304 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic)
305 continue;
306
307 if (*arg_count_props > count) {
308 ret = drm_object_property_get_value(obj, prop, &val);
309 if (ret)
310 return ret;
311
312 if (put_user(prop->base.id, prop_ptr + count))
313 return -EFAULT;
314
315 if (put_user(val, prop_values + count))
316 return -EFAULT;
317 }
318
319 count++;
320 }
321 *arg_count_props = count;
322
323 return 0;
324}
325
326/**
327 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property
328 * @dev: DRM device
329 * @data: ioctl data
330 * @file_priv: DRM file info
331 *
332 * This function retrieves the current value for an object's property. Compared
333 * to the connector specific ioctl this one is extended to also work on crtc and
334 * plane objects.
335 *
336 * Called by the user via ioctl.
337 *
338 * Returns:
339 * Zero on success, negative errno on failure.
340 */
341int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
342 struct drm_file *file_priv)
343{
344 struct drm_mode_obj_get_properties *arg = data;
345 struct drm_mode_object *obj;
346 int ret = 0;
347
348 if (!drm_core_check_feature(dev, DRIVER_MODESET))
349 return -EINVAL;
350
351 drm_modeset_lock_all(dev);
352
353 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
354 if (!obj) {
355 ret = -ENOENT;
356 goto out;
357 }
358 if (!obj->properties) {
359 ret = -EINVAL;
360 goto out_unref;
361 }
362
363 ret = drm_mode_object_get_properties(obj, file_priv->atomic,
364 (uint32_t __user *)(unsigned long)(arg->props_ptr),
365 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr),
366 &arg->count_props);
367
368out_unref:
369 drm_mode_object_unreference(obj);
370out:
371 drm_modeset_unlock_all(dev);
372 return ret;
373}
374
375struct drm_property *drm_mode_obj_find_prop_id(struct drm_mode_object *obj,
376 uint32_t prop_id)
377{
378 int i;
379
380 for (i = 0; i < obj->properties->count; i++)
381 if (obj->properties->properties[i]->base.id == prop_id)
382 return obj->properties->properties[i];
383
384 return NULL;
385}
386
387int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
388 struct drm_file *file_priv)
389{
390 struct drm_mode_obj_set_property *arg = data;
391 struct drm_mode_object *arg_obj;
392 struct drm_property *property;
393 int ret = -EINVAL;
394 struct drm_mode_object *ref;
395
396 if (!drm_core_check_feature(dev, DRIVER_MODESET))
397 return -EINVAL;
398
399 drm_modeset_lock_all(dev);
400
401 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
402 if (!arg_obj) {
403 ret = -ENOENT;
404 goto out;
405 }
406
407 if (!arg_obj->properties)
408 goto out_unref;
409
410 property = drm_mode_obj_find_prop_id(arg_obj, arg->prop_id);
411 if (!property)
412 goto out_unref;
413
414 if (!drm_property_change_valid_get(property, arg->value, &ref))
415 goto out_unref;
416
417 switch (arg_obj->type) {
418 case DRM_MODE_OBJECT_CONNECTOR:
419 ret = drm_mode_connector_set_obj_prop(arg_obj, property,
420 arg->value);
421 break;
422 case DRM_MODE_OBJECT_CRTC:
423 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value);
424 break;
425 case DRM_MODE_OBJECT_PLANE:
426 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj),
427 property, arg->value);
428 break;
429 }
430
431 drm_property_change_valid_put(property, ref);
432
433out_unref:
434 drm_mode_object_unreference(arg_obj);
435out:
436 drm_modeset_unlock_all(dev);
437 return ret;
438}