5  * iommufd provides control over the IOMMU HW objects created by IOMMU kernel
6  * drivers. IOMMU HW objects revolve around IO page tables that map incoming DMA
56 	rc = xa_alloc(&ictx->objects, &obj->id, XA_ZERO_ENTRY, xa_limit_31b,  in _iommufd_object_alloc()
97  * destruction. Expect for special kernel-only objects there is no in-kernel way
98  * to reliably destroy a single object. Thus all APIs that are creating objects
105 	XA_STATE(xas, &ictx->objects, obj->id);  in iommufd_object_finalize()
108 	xa_lock(&ictx->objects);  in iommufd_object_finalize()
110 	xa_unlock(&ictx->objects);  in iommufd_object_finalize()
118 	XA_STATE(xas, &ictx->objects, obj->id);  in iommufd_object_abort()
121 	xa_lock(&ictx->objects);  in iommufd_object_abort()
123 	xa_unlock(&ictx->objects);  in iommufd_object_abort()
174 	xa_lock(&ictx->objects);  in iommufd_get_object()
175 	obj = xa_load(&ictx->objects, id);  in iommufd_get_object()
179 	xa_unlock(&ictx->objects);  in iommufd_get_object()
211 	XA_STATE(xas, &ictx->objects, id);  in iommufd_object_remove()
217 	 * of objects used by external drivers and destroyed by this function.  in iommufd_object_remove()
235 	xa_lock(&ictx->objects);  in iommufd_object_remove()
261 	xa_unlock(&ictx->objects);  in iommufd_object_remove()
282 	xa_unlock(&ictx->objects);  in iommufd_object_remove()
314 	xa_init_flags(&ictx->objects, XA_FLAGS_ALLOC1 | XA_FLAGS_ACCOUNT);  in iommufd_fops_open()
333 	 * The objects in the xarray form a graph of "users" counts, and we have  in iommufd_fops_release()
334 	 * to destroy them in a depth first manner. Leaf objects will reduce the  in iommufd_fops_release()
335 	 * users count of interior objects when they are destroyed.  in iommufd_fops_release()
337 	 * Repeatedly destroying all the "1 users" leaf objects will progress  in iommufd_fops_release()
341 	while (!xa_empty(&ictx->objects)) {  in iommufd_fops_release()
354 		xa_for_each(&ictx->objects, index, obj) {  in iommufd_fops_release()
360 			xa_erase(&ictx->objects, index);  in iommufd_fops_release()
377 	xa_destroy(&ictx->objects);  in iommufd_fops_release()