1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (C) 2012 VMware, Inc. All rights reserved.
68  * The last_notify_idx_reserved is used to track the last index handed out - in
80  * with a given doorbell handle. For guest endpoints, the
82  * endpoints privileges are associated with the complete
83  * handle. Hypervisor endpoints are not yet supported.
100 		*priv_flags = entry->priv_flags;  in vmci_dbell_get_priv_flags()
104 		 * Hypervisor endpoints for notifications are not  in vmci_dbell_get_priv_flags()
125 		if (idx == dbell->idx)  in dbell_index_table_find()
142 	vmci_resource_get(&entry->resource);  in dbell_index_table_add()
186 	entry->idx = new_notify_idx;  in dbell_index_table_add()
187 	bucket = VMCI_DOORBELL_HASH(entry->idx);  in dbell_index_table_add()
188 	hlist_add_head(&entry->node, &vmci_doorbell_it.entries[bucket]);  in dbell_index_table_add()
201 	hlist_del_init(&entry->node);  in dbell_index_table_remove()
203 	notify_idx_count--;  in dbell_index_table_remove()
204 	if (entry->idx == max_notify_idx - 1) {  in dbell_index_table_remove()
213 		       !dbell_index_table_find(max_notify_idx - 1))  in dbell_index_table_remove()
214 			max_notify_idx--;  in dbell_index_table_remove()
217 	last_notify_idx_released = entry->idx;  in dbell_index_table_remove()
221 	vmci_resource_put(&entry->resource);  in dbell_index_table_remove()
236 	link_msg.hdr.payload_size = sizeof(link_msg) - VMCI_DG_HEADERSIZE;  in dbell_link()
254 	unlink_msg.hdr.payload_size = sizeof(unlink_msg) - VMCI_DG_HEADERSIZE;  in dbell_unlink()
268 	entry->notify_cb(entry->client_data);  in dbell_delayed_dispatch()
269 	vmci_resource_put(&entry->resource);  in dbell_delayed_dispatch()
295 	if (entry->run_delayed) {  in vmci_dbell_host_context_notify()
296 		if (!schedule_work(&entry->work))  in vmci_dbell_host_context_notify()
299 		entry->notify_cb(entry->client_data);  in vmci_dbell_host_context_notify()
317 	bitmap_set_msg.hdr.payload_size = sizeof(bitmap_set_msg) -  in vmci_dbell_register_notification_bitmap()
344 		if (dbell->idx == notify_idx &&  in dbell_fire_entries()
345 		    atomic_read(&dbell->active) == 1) {  in dbell_fire_entries()
346 			if (dbell->run_delayed) {  in dbell_fire_entries()
347 				vmci_resource_get(&dbell->resource);  in dbell_fire_entries()
348 				if (!schedule_work(&dbell->work))  in dbell_fire_entries()
349 					vmci_resource_put(&dbell->resource);  in dbell_fire_entries()
351 				dbell->notify_cb(dbell->client_data);  in dbell_fire_entries()
376  * vmci_doorbell_create() - Creates a doorbell
386  * locks held - the default) or delayed (in a kernel thread) by
432 		if (handle->context == VMCI_HOST_CONTEXT_ID ||  in vmci_doorbell_create()
434 		     vmci_get_context_id() == handle->context)) {  in vmci_doorbell_create()
438 		if (!valid_context || handle->resource == VMCI_INVALID_ID) {  in vmci_doorbell_create()
440 				 handle->context, handle->resource);  in vmci_doorbell_create()
448 	entry->idx = 0;  in vmci_doorbell_create()
449 	INIT_HLIST_NODE(&entry->node);  in vmci_doorbell_create()
450 	entry->priv_flags = priv_flags;  in vmci_doorbell_create()
451 	INIT_WORK(&entry->work, dbell_delayed_dispatch);  in vmci_doorbell_create()
452 	entry->run_delayed = flags & VMCI_FLAG_DELAYED_CB;  in vmci_doorbell_create()
453 	entry->notify_cb = notify_cb;  in vmci_doorbell_create()
454 	entry->client_data = client_data;  in vmci_doorbell_create()
455 	atomic_set(&entry->active, 0);  in vmci_doorbell_create()
457 	result = vmci_resource_add(&entry->resource,  in vmci_doorbell_create()
466 	new_handle = vmci_resource_handle(&entry->resource);  in vmci_doorbell_create()
469 		result = dbell_link(new_handle, entry->idx);  in vmci_doorbell_create()
473 		atomic_set(&entry->active, 1);  in vmci_doorbell_create()
482 	vmci_resource_remove(&entry->resource);  in vmci_doorbell_create()
490  * vmci_doorbell_destroy() - Destroy a doorbell.
514 	if (!hlist_unhashed(&entry->node)) {  in vmci_doorbell_destroy()
544 	vmci_resource_put(&entry->resource);  in vmci_doorbell_destroy()
545 	vmci_resource_remove(&entry->resource);  in vmci_doorbell_destroy()