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23#include <linux/export.h>
24#include <linux/uaccess.h>
25
26#include <drm/drm_atomic.h>
27#include <drm/drm_drv.h>
28#include <drm/drm_device.h>
29#include <drm/drm_file.h>
30#include <drm/drm_mode_object.h>
31#include <drm/drm_print.h>
32
33#include "drm_crtc_internal.h"
34
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38
39int __drm_mode_object_add(struct drm_device *dev, struct drm_mode_object *obj,
40 uint32_t obj_type, bool register_obj,
41 void (*obj_free_cb)(struct kref *kref))
42{
43 int ret;
44
45 mutex_lock(&dev->mode_config.idr_mutex);
46 ret = idr_alloc(&dev->mode_config.object_idr, register_obj ? obj : NULL,
47 1, 0, GFP_KERNEL);
48 if (ret >= 0) {
49
50
51
52
53 obj->id = ret;
54 obj->type = obj_type;
55 if (obj_free_cb) {
56 obj->free_cb = obj_free_cb;
57 kref_init(&obj->refcount);
58 }
59 }
60 mutex_unlock(&dev->mode_config.idr_mutex);
61
62 return ret < 0 ? ret : 0;
63}
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76
77int drm_mode_object_add(struct drm_device *dev,
78 struct drm_mode_object *obj, uint32_t obj_type)
79{
80 return __drm_mode_object_add(dev, obj, obj_type, true, NULL);
81}
82
83void drm_mode_object_register(struct drm_device *dev,
84 struct drm_mode_object *obj)
85{
86 mutex_lock(&dev->mode_config.idr_mutex);
87 idr_replace(&dev->mode_config.object_idr, obj, obj->id);
88 mutex_unlock(&dev->mode_config.idr_mutex);
89}
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101
102void drm_mode_object_unregister(struct drm_device *dev,
103 struct drm_mode_object *object)
104{
105 mutex_lock(&dev->mode_config.idr_mutex);
106 if (object->id) {
107 idr_remove(&dev->mode_config.object_idr, object->id);
108 object->id = 0;
109 }
110 mutex_unlock(&dev->mode_config.idr_mutex);
111}
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119
120bool drm_mode_object_lease_required(uint32_t type)
121{
122 switch(type) {
123 case DRM_MODE_OBJECT_CRTC:
124 case DRM_MODE_OBJECT_CONNECTOR:
125 case DRM_MODE_OBJECT_PLANE:
126 return true;
127 default:
128 return false;
129 }
130}
131
132struct drm_mode_object *__drm_mode_object_find(struct drm_device *dev,
133 struct drm_file *file_priv,
134 uint32_t id, uint32_t type)
135{
136 struct drm_mode_object *obj = NULL;
137
138 mutex_lock(&dev->mode_config.idr_mutex);
139 obj = idr_find(&dev->mode_config.object_idr, id);
140 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type)
141 obj = NULL;
142 if (obj && obj->id != id)
143 obj = NULL;
144
145 if (obj && drm_mode_object_lease_required(obj->type) &&
146 !_drm_lease_held(file_priv, obj->id))
147 obj = NULL;
148
149 if (obj && obj->free_cb) {
150 if (!kref_get_unless_zero(&obj->refcount))
151 obj = NULL;
152 }
153 mutex_unlock(&dev->mode_config.idr_mutex);
154
155 return obj;
156}
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168
169struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
170 struct drm_file *file_priv,
171 uint32_t id, uint32_t type)
172{
173 struct drm_mode_object *obj = NULL;
174
175 obj = __drm_mode_object_find(dev, file_priv, id, type);
176 return obj;
177}
178EXPORT_SYMBOL(drm_mode_object_find);
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187
188void drm_mode_object_put(struct drm_mode_object *obj)
189{
190 if (obj->free_cb) {
191 DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, kref_read(&obj->refcount));
192 kref_put(&obj->refcount, obj->free_cb);
193 }
194}
195EXPORT_SYMBOL(drm_mode_object_put);
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204
205void drm_mode_object_get(struct drm_mode_object *obj)
206{
207 if (obj->free_cb) {
208 DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, kref_read(&obj->refcount));
209 kref_get(&obj->refcount);
210 }
211}
212EXPORT_SYMBOL(drm_mode_object_get);
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223
224void drm_object_attach_property(struct drm_mode_object *obj,
225 struct drm_property *property,
226 uint64_t init_val)
227{
228 int count = obj->properties->count;
229
230 if (count == DRM_OBJECT_MAX_PROPERTY) {
231 WARN(1, "Failed to attach object property (type: 0x%x). Please "
232 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time "
233 "you see this message on the same object type.\n",
234 obj->type);
235 return;
236 }
237
238 obj->properties->properties[count] = property;
239 obj->properties->values[count] = init_val;
240 obj->properties->count++;
241}
242EXPORT_SYMBOL(drm_object_attach_property);
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263int drm_object_property_set_value(struct drm_mode_object *obj,
264 struct drm_property *property, uint64_t val)
265{
266 int i;
267
268 WARN_ON(drm_drv_uses_atomic_modeset(property->dev) &&
269 !(property->flags & DRM_MODE_PROP_IMMUTABLE));
270
271 for (i = 0; i < obj->properties->count; i++) {
272 if (obj->properties->properties[i] == property) {
273 obj->properties->values[i] = val;
274 return 0;
275 }
276 }
277
278 return -EINVAL;
279}
280EXPORT_SYMBOL(drm_object_property_set_value);
281
282static int __drm_object_property_get_value(struct drm_mode_object *obj,
283 struct drm_property *property,
284 uint64_t *val)
285{
286 int i;
287
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290
291
292 if (drm_drv_uses_atomic_modeset(property->dev) &&
293 !(property->flags & DRM_MODE_PROP_IMMUTABLE))
294 return drm_atomic_get_property(obj, property, val);
295
296 for (i = 0; i < obj->properties->count; i++) {
297 if (obj->properties->properties[i] == property) {
298 *val = obj->properties->values[i];
299 return 0;
300 }
301
302 }
303
304 return -EINVAL;
305}
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323
324int drm_object_property_get_value(struct drm_mode_object *obj,
325 struct drm_property *property, uint64_t *val)
326{
327 WARN_ON(drm_drv_uses_atomic_modeset(property->dev));
328
329 return __drm_object_property_get_value(obj, property, val);
330}
331EXPORT_SYMBOL(drm_object_property_get_value);
332
333
334int drm_mode_object_get_properties(struct drm_mode_object *obj, bool atomic,
335 uint32_t __user *prop_ptr,
336 uint64_t __user *prop_values,
337 uint32_t *arg_count_props)
338{
339 int i, ret, count;
340
341 for (i = 0, count = 0; i < obj->properties->count; i++) {
342 struct drm_property *prop = obj->properties->properties[i];
343 uint64_t val;
344
345 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic)
346 continue;
347
348 if (*arg_count_props > count) {
349 ret = __drm_object_property_get_value(obj, prop, &val);
350 if (ret)
351 return ret;
352
353 if (put_user(prop->base.id, prop_ptr + count))
354 return -EFAULT;
355
356 if (put_user(val, prop_values + count))
357 return -EFAULT;
358 }
359
360 count++;
361 }
362 *arg_count_props = count;
363
364 return 0;
365}
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382int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
383 struct drm_file *file_priv)
384{
385 struct drm_mode_obj_get_properties *arg = data;
386 struct drm_mode_object *obj;
387 int ret = 0;
388
389 if (!drm_core_check_feature(dev, DRIVER_MODESET))
390 return -EOPNOTSUPP;
391
392 drm_modeset_lock_all(dev);
393
394 obj = drm_mode_object_find(dev, file_priv, arg->obj_id, arg->obj_type);
395 if (!obj) {
396 ret = -ENOENT;
397 goto out;
398 }
399 if (!obj->properties) {
400 ret = -EINVAL;
401 goto out_unref;
402 }
403
404 ret = drm_mode_object_get_properties(obj, file_priv->atomic,
405 (uint32_t __user *)(unsigned long)(arg->props_ptr),
406 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr),
407 &arg->count_props);
408
409out_unref:
410 drm_mode_object_put(obj);
411out:
412 drm_modeset_unlock_all(dev);
413 return ret;
414}
415
416struct drm_property *drm_mode_obj_find_prop_id(struct drm_mode_object *obj,
417 uint32_t prop_id)
418{
419 int i;
420
421 for (i = 0; i < obj->properties->count; i++)
422 if (obj->properties->properties[i]->base.id == prop_id)
423 return obj->properties->properties[i];
424
425 return NULL;
426}
427
428static int set_property_legacy(struct drm_mode_object *obj,
429 struct drm_property *prop,
430 uint64_t prop_value)
431{
432 struct drm_device *dev = prop->dev;
433 struct drm_mode_object *ref;
434 int ret = -EINVAL;
435
436 if (!drm_property_change_valid_get(prop, prop_value, &ref))
437 return -EINVAL;
438
439 drm_modeset_lock_all(dev);
440 switch (obj->type) {
441 case DRM_MODE_OBJECT_CONNECTOR:
442 ret = drm_connector_set_obj_prop(obj, prop, prop_value);
443 break;
444 case DRM_MODE_OBJECT_CRTC:
445 ret = drm_mode_crtc_set_obj_prop(obj, prop, prop_value);
446 break;
447 case DRM_MODE_OBJECT_PLANE:
448 ret = drm_mode_plane_set_obj_prop(obj_to_plane(obj),
449 prop, prop_value);
450 break;
451 }
452 drm_property_change_valid_put(prop, ref);
453 drm_modeset_unlock_all(dev);
454
455 return ret;
456}
457
458static int set_property_atomic(struct drm_mode_object *obj,
459 struct drm_file *file_priv,
460 struct drm_property *prop,
461 uint64_t prop_value)
462{
463 struct drm_device *dev = prop->dev;
464 struct drm_atomic_state *state;
465 struct drm_modeset_acquire_ctx ctx;
466 int ret;
467
468 state = drm_atomic_state_alloc(dev);
469 if (!state)
470 return -ENOMEM;
471
472 drm_modeset_acquire_init(&ctx, 0);
473 state->acquire_ctx = &ctx;
474
475retry:
476 if (prop == state->dev->mode_config.dpms_property) {
477 if (obj->type != DRM_MODE_OBJECT_CONNECTOR) {
478 ret = -EINVAL;
479 goto out;
480 }
481
482 ret = drm_atomic_connector_commit_dpms(state,
483 obj_to_connector(obj),
484 prop_value);
485 } else {
486 ret = drm_atomic_set_property(state, file_priv, obj, prop, prop_value);
487 if (ret)
488 goto out;
489 ret = drm_atomic_commit(state);
490 }
491out:
492 if (ret == -EDEADLK) {
493 drm_atomic_state_clear(state);
494 drm_modeset_backoff(&ctx);
495 goto retry;
496 }
497
498 drm_atomic_state_put(state);
499
500 drm_modeset_drop_locks(&ctx);
501 drm_modeset_acquire_fini(&ctx);
502
503 return ret;
504}
505
506int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
507 struct drm_file *file_priv)
508{
509 struct drm_mode_obj_set_property *arg = data;
510 struct drm_mode_object *arg_obj;
511 struct drm_property *property;
512 int ret = -EINVAL;
513
514 if (!drm_core_check_feature(dev, DRIVER_MODESET))
515 return -EOPNOTSUPP;
516
517 arg_obj = drm_mode_object_find(dev, file_priv, arg->obj_id, arg->obj_type);
518 if (!arg_obj)
519 return -ENOENT;
520
521 if (!arg_obj->properties)
522 goto out_unref;
523
524 property = drm_mode_obj_find_prop_id(arg_obj, arg->prop_id);
525 if (!property)
526 goto out_unref;
527
528 if (drm_drv_uses_atomic_modeset(property->dev))
529 ret = set_property_atomic(arg_obj, file_priv, property, arg->value);
530 else
531 ret = set_property_legacy(arg_obj, property, arg->value);
532
533out_unref:
534 drm_mode_object_put(arg_obj);
535 return ret;
536}
537