gpu/drm/drm_lease.c

39  * - A 'lessee' is a &struct drm_master which is leasing objects from some
40  *   other &struct drm_master. Each lessee only leases resources from a single
44  * - A 'lease' is a contract between the lessor and lessee that identifies
45  *   which resources may be controlled by the lessee. All of the resources
58  * Since each lessee may lease objects from a single lessor, display resource
69 #define drm_for_each_lessee(lessee, lessor) \
70 	list_for_each_entry((lessee), &(lessor)->lessees, lessee_list)
96 /* Checks if the given object has been leased to some lessee of drm_master */
99 	struct drm_master *lessee;
102 	drm_for_each_lessee(lessee, master)
103 		if (_drm_lease_held_master(lessee, id))
203  * 	ERR_PTR(-EBUSY)		some other lessee holds title to this object
211 	struct drm_master *lessee;
218 	lessee = drm_master_create(lessor->dev);
219 	if (!lessee) {
239 	/* Insert the new lessee into the tree */
240 	id = idr_alloc(&(drm_lease_owner(lessor)->lessee_idr), lessee, 1, 0, GFP_KERNEL);
246 	lessee->lessee_id = id;
247 	lessee->lessor = drm_master_get(lessor);
248 	list_add_tail(&lessee->lessee_list, &lessor->lessees);
251 	lessee->leases = *leases;
252 	drm_dbg_lease(dev, "new lessee %d %p, lessor %d %p\n",
253 		      lessee->lessee_id, lessee, lessor->lessee_id, lessor);
256 	return lessee;
261 	drm_master_put(&lessee);
279 	/* Remove this master from the lessee idr in the owner */
286 	/* Remove this master from any lessee list it may be on */
292 		/* Tell the master to check the lessee list */
484 	struct drm_master *lessee = NULL;
541 	/* lessee will take the ownership of leases */
542 	lessee = drm_lease_create(lessor, &leases);
544 	if (IS_ERR(lessee)) {
545 		ret = PTR_ERR(lessee);
561 	lessee_priv->master = lessee;
566 	drm_dbg_lease(dev, "Returning fd %d id %d\n", fd, lessee->lessee_id);
568 	cl->lessee_id = lessee->lessee_id;
578 	drm_master_put(&lessee);
595 	struct drm_master *lessor, *lessee;
612 	drm_for_each_lessee(lessee, lessor) {
614 		if (!idr_is_empty(&lessee->leases)) {
616 				drm_dbg_lease(dev, "Add lessee %d\n",
617 					      lessee->lessee_id);
618 				ret = put_user(lessee->lessee_id, lessee_ids + count);
636 /* Return the list of leased objects for the specified lessee */
643 	struct drm_master *lessee;
657 	lessee = drm_file_get_master(lessee_priv);
658 	drm_dbg_lease(dev, "get lease for %d\n", lessee->lessee_id);
662 	if (lessee->lessor == NULL)
664 		object_idr = &lessee->dev->mode_config.object_idr;
666 		/* lessee can only use allowed object */
667 		object_idr = &lessee->leases;
685 	drm_master_put(&lessee);
700 	struct drm_master *lessee;
712 	lessee = _drm_find_lessee(lessor, arg->lessee_id);
714 	/* No such lessee */
715 	if (!lessee) {
721 	if (lessee->lessor != lessor) {
726 	_drm_lease_revoke(lessee);