140 static void nvmet_async_events_failall(struct nvmet_ctrl *ctrl)  in nvmet_async_events_failall()  argument
144 	mutex_lock(&ctrl->lock);  in nvmet_async_events_failall()
145 	while (ctrl->nr_async_event_cmds) {  in nvmet_async_events_failall()
146 		req = ctrl->async_event_cmds[--ctrl->nr_async_event_cmds];  in nvmet_async_events_failall()
147 		mutex_unlock(&ctrl->lock);  in nvmet_async_events_failall()
149 		mutex_lock(&ctrl->lock);  in nvmet_async_events_failall()
151 	mutex_unlock(&ctrl->lock);  in nvmet_async_events_failall()
154 static void nvmet_async_events_process(struct nvmet_ctrl *ctrl)  in nvmet_async_events_process()  argument
159 	mutex_lock(&ctrl->lock);  in nvmet_async_events_process()
160 	while (ctrl->nr_async_event_cmds && !list_empty(&ctrl->async_events)) {  in nvmet_async_events_process()
161 		aen = list_first_entry(&ctrl->async_events,  in nvmet_async_events_process()
163 		req = ctrl->async_event_cmds[--ctrl->nr_async_event_cmds];  in nvmet_async_events_process()
169 		mutex_unlock(&ctrl->lock);  in nvmet_async_events_process()
170 		trace_nvmet_async_event(ctrl, req->cqe->result.u32);  in nvmet_async_events_process()
172 		mutex_lock(&ctrl->lock);  in nvmet_async_events_process()
174 	mutex_unlock(&ctrl->lock);  in nvmet_async_events_process()
177 static void nvmet_async_events_free(struct nvmet_ctrl *ctrl)  in nvmet_async_events_free()  argument
181 	mutex_lock(&ctrl->lock);  in nvmet_async_events_free()
182 	list_for_each_entry_safe(aen, tmp, &ctrl->async_events, entry) {  in nvmet_async_events_free()
186 	mutex_unlock(&ctrl->lock);  in nvmet_async_events_free()
191 	struct nvmet_ctrl *ctrl =  in nvmet_async_event_work()  local
194 	nvmet_async_events_process(ctrl);  in nvmet_async_event_work()
197 void nvmet_add_async_event(struct nvmet_ctrl *ctrl, u8 event_type,  in nvmet_add_async_event()  argument
210 	mutex_lock(&ctrl->lock);  in nvmet_add_async_event()
211 	list_add_tail(&aen->entry, &ctrl->async_events);  in nvmet_add_async_event()
212 	mutex_unlock(&ctrl->lock);  in nvmet_add_async_event()
214 	queue_work(nvmet_wq, &ctrl->async_event_work);  in nvmet_add_async_event()
217 static void nvmet_add_to_changed_ns_log(struct nvmet_ctrl *ctrl, __le32 nsid)  in nvmet_add_to_changed_ns_log()  argument
221 	mutex_lock(&ctrl->lock);  in nvmet_add_to_changed_ns_log()
222 	if (ctrl->nr_changed_ns > NVME_MAX_CHANGED_NAMESPACES)  in nvmet_add_to_changed_ns_log()
225 	for (i = 0; i < ctrl->nr_changed_ns; i++) {  in nvmet_add_to_changed_ns_log()
226 		if (ctrl->changed_ns_list[i] == nsid)  in nvmet_add_to_changed_ns_log()
230 	if (ctrl->nr_changed_ns == NVME_MAX_CHANGED_NAMESPACES) {  in nvmet_add_to_changed_ns_log()
231 		ctrl->changed_ns_list[0] = cpu_to_le32(0xffffffff);  in nvmet_add_to_changed_ns_log()
232 		ctrl->nr_changed_ns = U32_MAX;  in nvmet_add_to_changed_ns_log()
236 	ctrl->changed_ns_list[ctrl->nr_changed_ns++] = nsid;  in nvmet_add_to_changed_ns_log()
238 	mutex_unlock(&ctrl->lock);  in nvmet_add_to_changed_ns_log()
243 	struct nvmet_ctrl *ctrl;  in nvmet_ns_changed()  local
247 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) {  in nvmet_ns_changed()
248 		nvmet_add_to_changed_ns_log(ctrl, cpu_to_le32(nsid));  in nvmet_ns_changed()
249 		if (nvmet_aen_bit_disabled(ctrl, NVME_AEN_BIT_NS_ATTR))  in nvmet_ns_changed()
251 		nvmet_add_async_event(ctrl, NVME_AER_NOTICE,  in nvmet_ns_changed()
260 	struct nvmet_ctrl *ctrl;  in nvmet_send_ana_event()  local
263 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) {  in nvmet_send_ana_event()
264 		if (port && ctrl->port != port)  in nvmet_send_ana_event()
266 		if (nvmet_aen_bit_disabled(ctrl, NVME_AEN_BIT_ANA_CHANGE))  in nvmet_send_ana_event()
268 		nvmet_add_async_event(ctrl, NVME_AER_NOTICE,  in nvmet_send_ana_event()
309 	struct nvmet_ctrl *ctrl;  in nvmet_port_del_ctrls()  local
312 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) {  in nvmet_port_del_ctrls()
313 		if (ctrl->port == port)  in nvmet_port_del_ctrls()
314 			ctrl->ops->delete_ctrl(ctrl);  in nvmet_port_del_ctrls()
386 	struct nvmet_ctrl *ctrl = container_of(to_delayed_work(work),  in nvmet_keep_alive_timer()  local
388 	bool reset_tbkas = ctrl->reset_tbkas;  in nvmet_keep_alive_timer()
390 	ctrl->reset_tbkas = false;  in nvmet_keep_alive_timer()
392 		pr_debug("ctrl %d reschedule traffic based keep-alive timer\n",  in nvmet_keep_alive_timer()
393 			ctrl->cntlid);  in nvmet_keep_alive_timer()
394 		queue_delayed_work(nvmet_wq, &ctrl->ka_work, ctrl->kato * HZ);  in nvmet_keep_alive_timer()
398 	pr_err("ctrl %d keep-alive timer (%d seconds) expired!\n",  in nvmet_keep_alive_timer()
399 		ctrl->cntlid, ctrl->kato);  in nvmet_keep_alive_timer()
401 	nvmet_ctrl_fatal_error(ctrl);  in nvmet_keep_alive_timer()
404 void nvmet_start_keep_alive_timer(struct nvmet_ctrl *ctrl)  in nvmet_start_keep_alive_timer()  argument
406 	if (unlikely(ctrl->kato == 0))  in nvmet_start_keep_alive_timer()
409 	pr_debug("ctrl %d start keep-alive timer for %d secs\n",  in nvmet_start_keep_alive_timer()
410 		ctrl->cntlid, ctrl->kato);  in nvmet_start_keep_alive_timer()
412 	queue_delayed_work(nvmet_wq, &ctrl->ka_work, ctrl->kato * HZ);  in nvmet_start_keep_alive_timer()
415 void nvmet_stop_keep_alive_timer(struct nvmet_ctrl *ctrl)  in nvmet_stop_keep_alive_timer()  argument
417 	if (unlikely(ctrl->kato == 0))  in nvmet_stop_keep_alive_timer()
420 	pr_debug("ctrl %d stop keep-alive\n", ctrl->cntlid);  in nvmet_stop_keep_alive_timer()
422 	cancel_delayed_work_sync(&ctrl->ka_work);  in nvmet_stop_keep_alive_timer()
502  * Note: ctrl->subsys->lock should be held when calling this function
504 static void nvmet_p2pmem_ns_add_p2p(struct nvmet_ctrl *ctrl,  in nvmet_p2pmem_ns_add_p2p()  argument
511 	if (!ctrl->p2p_client || !ns->use_p2pmem)  in nvmet_p2pmem_ns_add_p2p()
515 		ret = pci_p2pdma_distance(ns->p2p_dev, ctrl->p2p_client, true);  in nvmet_p2pmem_ns_add_p2p()
521 		clients[0] = ctrl->p2p_client;  in nvmet_p2pmem_ns_add_p2p()
527 			       dev_name(ctrl->p2p_client), ns->device_path);  in nvmet_p2pmem_ns_add_p2p()
532 	ret = radix_tree_insert(&ctrl->p2p_ns_map, ns->nsid, p2p_dev);  in nvmet_p2pmem_ns_add_p2p()
555 	struct nvmet_ctrl *ctrl;  in nvmet_ns_enable()  local
583 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry)  in nvmet_ns_enable()
584 		nvmet_p2pmem_ns_add_p2p(ctrl, ns);  in nvmet_ns_enable()
611 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry)  in nvmet_ns_enable()
612 		pci_dev_put(radix_tree_delete(&ctrl->p2p_ns_map, ns->nsid));  in nvmet_ns_enable()
621 	struct nvmet_ctrl *ctrl;  in nvmet_ns_disable()  local
632 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry)  in nvmet_ns_disable()
633 		pci_dev_put(radix_tree_delete(&ctrl->p2p_ns_map, ns->nsid));  in nvmet_ns_disable()
711 	struct nvmet_ctrl *ctrl = req->sq->ctrl;  in nvmet_set_error()  local
717 	if (!ctrl || req->error_loc == NVMET_NO_ERROR_LOC)  in nvmet_set_error()
720 	spin_lock_irqsave(&ctrl->error_lock, flags);  in nvmet_set_error()
721 	ctrl->err_counter++;  in nvmet_set_error()
723 		&ctrl->slots[ctrl->err_counter % NVMET_ERROR_LOG_SLOTS];  in nvmet_set_error()
725 	new_error_slot->error_count = cpu_to_le64(ctrl->err_counter);  in nvmet_set_error()
732 	spin_unlock_irqrestore(&ctrl->error_lock, flags);  in nvmet_set_error()
766 void nvmet_cq_setup(struct nvmet_ctrl *ctrl, struct nvmet_cq *cq,  in nvmet_cq_setup()  argument
773 void nvmet_sq_setup(struct nvmet_ctrl *ctrl, struct nvmet_sq *sq,  in nvmet_sq_setup()  argument
780 	ctrl->sqs[qid] = sq;  in nvmet_sq_setup()
792 	struct nvmet_ctrl *ctrl = sq->ctrl;  in nvmet_sq_destroy()  local
798 	if (ctrl && ctrl->sqs && ctrl->sqs[0] == sq)  in nvmet_sq_destroy()
799 		nvmet_async_events_failall(ctrl);  in nvmet_sq_destroy()
806 	if (ctrl) {  in nvmet_sq_destroy()
813 		ctrl->reset_tbkas = true;  in nvmet_sq_destroy()
814 		sq->ctrl->sqs[sq->qid] = NULL;  in nvmet_sq_destroy()
815 		nvmet_ctrl_put(ctrl);  in nvmet_sq_destroy()
816 		sq->ctrl = NULL; /* allows reusing the queue later */  in nvmet_sq_destroy()
960 	if (unlikely(!req->sq->ctrl))  in nvmet_req_init()
978 	if (sq->ctrl)  in nvmet_req_init()
979 		sq->ctrl->reset_tbkas = true;  in nvmet_req_init()
1052 	    !req->sq->ctrl || !req->sq->qid || !req->ns)  in nvmet_req_find_p2p_dev()
1054 	return radix_tree_lookup(&req->sq->ctrl->p2p_ns_map, req->ns->nsid);  in nvmet_req_find_p2p_dev()
1150 static void nvmet_start_ctrl(struct nvmet_ctrl *ctrl)  in nvmet_start_ctrl()  argument
1152 	lockdep_assert_held(&ctrl->lock);  in nvmet_start_ctrl()
1160 	if (!nvmet_is_disc_subsys(ctrl->subsys) &&  in nvmet_start_ctrl()
1161 	    (nvmet_cc_iosqes(ctrl->cc) != NVME_NVM_IOSQES ||  in nvmet_start_ctrl()
1162 	     nvmet_cc_iocqes(ctrl->cc) != NVME_NVM_IOCQES)) {  in nvmet_start_ctrl()
1163 		ctrl->csts = NVME_CSTS_CFS;  in nvmet_start_ctrl()
1167 	if (nvmet_cc_mps(ctrl->cc) != 0 ||  in nvmet_start_ctrl()
1168 	    nvmet_cc_ams(ctrl->cc) != 0 ||  in nvmet_start_ctrl()
1169 	    !nvmet_css_supported(nvmet_cc_css(ctrl->cc))) {  in nvmet_start_ctrl()
1170 		ctrl->csts = NVME_CSTS_CFS;  in nvmet_start_ctrl()
1174 	ctrl->csts = NVME_CSTS_RDY;  in nvmet_start_ctrl()
1182 	if (ctrl->kato)  in nvmet_start_ctrl()
1183 		mod_delayed_work(nvmet_wq, &ctrl->ka_work, ctrl->kato * HZ);  in nvmet_start_ctrl()
1186 static void nvmet_clear_ctrl(struct nvmet_ctrl *ctrl)  in nvmet_clear_ctrl()  argument
1188 	lockdep_assert_held(&ctrl->lock);  in nvmet_clear_ctrl()
1191 	ctrl->csts &= ~NVME_CSTS_RDY;  in nvmet_clear_ctrl()
1192 	ctrl->cc = 0;  in nvmet_clear_ctrl()
1195 void nvmet_update_cc(struct nvmet_ctrl *ctrl, u32 new)  in nvmet_update_cc()  argument
1199 	mutex_lock(&ctrl->lock);  in nvmet_update_cc()
1200 	old = ctrl->cc;  in nvmet_update_cc()
1201 	ctrl->cc = new;  in nvmet_update_cc()
1204 		nvmet_start_ctrl(ctrl);  in nvmet_update_cc()
1206 		nvmet_clear_ctrl(ctrl);  in nvmet_update_cc()
1208 		nvmet_clear_ctrl(ctrl);  in nvmet_update_cc()
1209 		ctrl->csts |= NVME_CSTS_SHST_CMPLT;  in nvmet_update_cc()
1212 		ctrl->csts &= ~NVME_CSTS_SHST_CMPLT;  in nvmet_update_cc()
1213 	mutex_unlock(&ctrl->lock);  in nvmet_update_cc()
1216 static void nvmet_init_cap(struct nvmet_ctrl *ctrl)  in nvmet_init_cap()  argument
1219 	ctrl->cap = (1ULL << 37);  in nvmet_init_cap()
1221 	ctrl->cap |= (1ULL << 43);  in nvmet_init_cap()
1223 	ctrl->cap |= (15ULL << 24);  in nvmet_init_cap()
1225 	if (ctrl->ops->get_max_queue_size)  in nvmet_init_cap()
1226 		ctrl->cap |= ctrl->ops->get_max_queue_size(ctrl) - 1;  in nvmet_init_cap()
1228 		ctrl->cap |= NVMET_QUEUE_SIZE - 1;  in nvmet_init_cap()
1230 	if (nvmet_is_passthru_subsys(ctrl->subsys))  in nvmet_init_cap()
1231 		nvmet_passthrough_override_cap(ctrl);  in nvmet_init_cap()
1238 	struct nvmet_ctrl *ctrl = NULL;  in nvmet_ctrl_find_get()  local
1250 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) {  in nvmet_ctrl_find_get()
1251 		if (ctrl->cntlid == cntlid) {  in nvmet_ctrl_find_get()
1252 			if (strncmp(hostnqn, ctrl->hostnqn, NVMF_NQN_SIZE)) {  in nvmet_ctrl_find_get()
1256 			if (!kref_get_unless_zero(&ctrl->ref))  in nvmet_ctrl_find_get()
1259 			/* ctrl found */  in nvmet_ctrl_find_get()
1264 	ctrl = NULL; /* ctrl not found */  in nvmet_ctrl_find_get()
1273 	return ctrl;  in nvmet_ctrl_find_get()
1278 	if (unlikely(!(req->sq->ctrl->cc & NVME_CC_ENABLE))) {  in nvmet_check_ctrl_status()
1284 	if (unlikely(!(req->sq->ctrl->csts & NVME_CSTS_RDY))) {  in nvmet_check_ctrl_status()
1318  * Note: ctrl->subsys->lock should be held when calling this function
1320 static void nvmet_setup_p2p_ns_map(struct nvmet_ctrl *ctrl,  in nvmet_setup_p2p_ns_map()  argument
1329 	ctrl->p2p_client = get_device(req->p2p_client);  in nvmet_setup_p2p_ns_map()
1331 	xa_for_each(&ctrl->subsys->namespaces, idx, ns)  in nvmet_setup_p2p_ns_map()
1332 		nvmet_p2pmem_ns_add_p2p(ctrl, ns);  in nvmet_setup_p2p_ns_map()
1336  * Note: ctrl->subsys->lock should be held when calling this function
1338 static void nvmet_release_p2p_ns_map(struct nvmet_ctrl *ctrl)  in nvmet_release_p2p_ns_map()  argument
1343 	radix_tree_for_each_slot(slot, &ctrl->p2p_ns_map, &iter, 0)  in nvmet_release_p2p_ns_map()
1346 	put_device(ctrl->p2p_client);  in nvmet_release_p2p_ns_map()
1351 	struct nvmet_ctrl *ctrl =  in nvmet_fatal_error_handler()  local
1354 	pr_err("ctrl %d fatal error occurred!\n", ctrl->cntlid);  in nvmet_fatal_error_handler()
1355 	ctrl->ops->delete_ctrl(ctrl);  in nvmet_fatal_error_handler()
1362 	struct nvmet_ctrl *ctrl;  in nvmet_alloc_ctrl()  local
1389 	ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);  in nvmet_alloc_ctrl()
1390 	if (!ctrl)  in nvmet_alloc_ctrl()
1392 	mutex_init(&ctrl->lock);  in nvmet_alloc_ctrl()
1394 	ctrl->port = req->port;  in nvmet_alloc_ctrl()
1395 	ctrl->ops = req->ops;  in nvmet_alloc_ctrl()
1399 	if (ctrl->port->disc_addr.trtype == NVMF_TRTYPE_LOOP)  in nvmet_alloc_ctrl()
1403 	INIT_WORK(&ctrl->async_event_work, nvmet_async_event_work);  in nvmet_alloc_ctrl()
1404 	INIT_LIST_HEAD(&ctrl->async_events);  in nvmet_alloc_ctrl()
1405 	INIT_RADIX_TREE(&ctrl->p2p_ns_map, GFP_KERNEL);  in nvmet_alloc_ctrl()
1406 	INIT_WORK(&ctrl->fatal_err_work, nvmet_fatal_error_handler);  in nvmet_alloc_ctrl()
1407 	INIT_DELAYED_WORK(&ctrl->ka_work, nvmet_keep_alive_timer);  in nvmet_alloc_ctrl()
1409 	memcpy(ctrl->subsysnqn, subsysnqn, NVMF_NQN_SIZE);  in nvmet_alloc_ctrl()
1410 	memcpy(ctrl->hostnqn, hostnqn, NVMF_NQN_SIZE);  in nvmet_alloc_ctrl()
1412 	kref_init(&ctrl->ref);  in nvmet_alloc_ctrl()
1413 	ctrl->subsys = subsys;  in nvmet_alloc_ctrl()
1414 	nvmet_init_cap(ctrl);  in nvmet_alloc_ctrl()
1415 	WRITE_ONCE(ctrl->aen_enabled, NVMET_AEN_CFG_OPTIONAL);  in nvmet_alloc_ctrl()
1417 	ctrl->changed_ns_list = kmalloc_array(NVME_MAX_CHANGED_NAMESPACES,  in nvmet_alloc_ctrl()
1419 	if (!ctrl->changed_ns_list)  in nvmet_alloc_ctrl()
1422 	ctrl->sqs = kcalloc(subsys->max_qid + 1,  in nvmet_alloc_ctrl()
1425 	if (!ctrl->sqs)  in nvmet_alloc_ctrl()
1435 	ctrl->cntlid = ret;  in nvmet_alloc_ctrl()
1441 	if (nvmet_is_disc_subsys(ctrl->subsys) && !kato)  in nvmet_alloc_ctrl()
1445 	ctrl->kato = DIV_ROUND_UP(kato, 1000);  in nvmet_alloc_ctrl()
1447 	ctrl->err_counter = 0;  in nvmet_alloc_ctrl()
1448 	spin_lock_init(&ctrl->error_lock);  in nvmet_alloc_ctrl()
1450 	nvmet_start_keep_alive_timer(ctrl);  in nvmet_alloc_ctrl()
1453 	list_add_tail(&ctrl->subsys_entry, &subsys->ctrls);  in nvmet_alloc_ctrl()
1454 	nvmet_setup_p2p_ns_map(ctrl, req);  in nvmet_alloc_ctrl()
1457 	*ctrlp = ctrl;  in nvmet_alloc_ctrl()
1461 	kfree(ctrl->sqs);  in nvmet_alloc_ctrl()
1463 	kfree(ctrl->changed_ns_list);  in nvmet_alloc_ctrl()
1465 	kfree(ctrl);  in nvmet_alloc_ctrl()
1474 	struct nvmet_ctrl *ctrl = container_of(ref, struct nvmet_ctrl, ref);  in nvmet_ctrl_free()  local
1475 	struct nvmet_subsys *subsys = ctrl->subsys;  in nvmet_ctrl_free()
1478 	nvmet_release_p2p_ns_map(ctrl);  in nvmet_ctrl_free()
1479 	list_del(&ctrl->subsys_entry);  in nvmet_ctrl_free()
1482 	nvmet_stop_keep_alive_timer(ctrl);  in nvmet_ctrl_free()
1484 	flush_work(&ctrl->async_event_work);  in nvmet_ctrl_free()
1485 	cancel_work_sync(&ctrl->fatal_err_work);  in nvmet_ctrl_free()
1487 	nvmet_destroy_auth(ctrl);  in nvmet_ctrl_free()
1489 	ida_free(&cntlid_ida, ctrl->cntlid);  in nvmet_ctrl_free()
1491 	nvmet_async_events_free(ctrl);  in nvmet_ctrl_free()
1492 	kfree(ctrl->sqs);  in nvmet_ctrl_free()
1493 	kfree(ctrl->changed_ns_list);  in nvmet_ctrl_free()
1494 	kfree(ctrl);  in nvmet_ctrl_free()
1499 void nvmet_ctrl_put(struct nvmet_ctrl *ctrl)  in nvmet_ctrl_put()  argument
1501 	kref_put(&ctrl->ref, nvmet_ctrl_free);  in nvmet_ctrl_put()
1504 void nvmet_ctrl_fatal_error(struct nvmet_ctrl *ctrl)  in nvmet_ctrl_fatal_error()  argument
1506 	mutex_lock(&ctrl->lock);  in nvmet_ctrl_fatal_error()
1507 	if (!(ctrl->csts & NVME_CSTS_CFS)) {  in nvmet_ctrl_fatal_error()
1508 		ctrl->csts |= NVME_CSTS_CFS;  in nvmet_ctrl_fatal_error()
1509 		queue_work(nvmet_wq, &ctrl->fatal_err_work);  in nvmet_ctrl_fatal_error()
1511 	mutex_unlock(&ctrl->lock);  in nvmet_ctrl_fatal_error()
1631 	struct nvmet_ctrl *ctrl;  in nvmet_subsys_del_ctrls()  local
1634 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry)  in nvmet_subsys_del_ctrls()
1635 		ctrl->ops->delete_ctrl(ctrl);  in nvmet_subsys_del_ctrls()