75 int scsi_host_set_state(struct Scsi_Host *shost, enum scsi_host_state state)  in scsi_host_set_state()  argument
77 	enum scsi_host_state oldstate = shost->shost_state;  in scsi_host_set_state()
148 	shost->shost_state = state;  in scsi_host_set_state()
153 				shost_printk(KERN_ERR, shost,  in scsi_host_set_state()
165 void scsi_remove_host(struct Scsi_Host *shost)  in scsi_remove_host()  argument
169 	mutex_lock(&shost->scan_mutex);  in scsi_remove_host()
170 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_remove_host()
171 	if (scsi_host_set_state(shost, SHOST_CANCEL))  in scsi_remove_host()
172 		if (scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY)) {  in scsi_remove_host()
173 			spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_remove_host()
174 			mutex_unlock(&shost->scan_mutex);  in scsi_remove_host()
177 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_remove_host()
179 	scsi_autopm_get_host(shost);  in scsi_remove_host()
180 	flush_workqueue(shost->tmf_work_q);  in scsi_remove_host()
181 	scsi_forget_host(shost);  in scsi_remove_host()
182 	mutex_unlock(&shost->scan_mutex);  in scsi_remove_host()
183 	scsi_proc_host_rm(shost);  in scsi_remove_host()
184 	scsi_proc_hostdir_rm(shost->hostt);  in scsi_remove_host()
192 	kref_put(&shost->tagset_refcnt, scsi_mq_free_tags);  in scsi_remove_host()
193 	wait_for_completion(&shost->tagset_freed);  in scsi_remove_host()
195 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_remove_host()
196 	if (scsi_host_set_state(shost, SHOST_DEL))  in scsi_remove_host()
197 		BUG_ON(scsi_host_set_state(shost, SHOST_DEL_RECOVERY));  in scsi_remove_host()
198 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_remove_host()
200 	transport_unregister_device(&shost->shost_gendev);  in scsi_remove_host()
201 	device_unregister(&shost->shost_dev);  in scsi_remove_host()
202 	device_del(&shost->shost_gendev);  in scsi_remove_host()
219 int scsi_add_host_with_dma(struct Scsi_Host *shost, struct device *dev,  in scsi_add_host_with_dma()  argument
222 	const struct scsi_host_template *sht = shost->hostt;  in scsi_add_host_with_dma()
225 	shost_printk(KERN_INFO, shost, "%s\n",  in scsi_add_host_with_dma()
226 			sht->info ? sht->info(shost) : sht->name);  in scsi_add_host_with_dma()
228 	if (!shost->can_queue) {  in scsi_add_host_with_dma()
229 		shost_printk(KERN_ERR, shost,  in scsi_add_host_with_dma()
235 	shost->cmd_per_lun = min_t(int, shost->cmd_per_lun,  in scsi_add_host_with_dma()
236 				   shost->can_queue);  in scsi_add_host_with_dma()
238 	error = scsi_init_sense_cache(shost);  in scsi_add_host_with_dma()
242 	if (!shost->shost_gendev.parent)  in scsi_add_host_with_dma()
243 		shost->shost_gendev.parent = dev ? dev : &platform_bus;  in scsi_add_host_with_dma()
245 		dma_dev = shost->shost_gendev.parent;  in scsi_add_host_with_dma()
247 	shost->dma_dev = dma_dev;  in scsi_add_host_with_dma()
250 		shost->max_sectors = min_t(unsigned int, shost->max_sectors,  in scsi_add_host_with_dma()
254 	error = scsi_mq_setup_tags(shost);  in scsi_add_host_with_dma()
258 	kref_init(&shost->tagset_refcnt);  in scsi_add_host_with_dma()
259 	init_completion(&shost->tagset_freed);  in scsi_add_host_with_dma()
266 	pm_runtime_get_noresume(&shost->shost_gendev);  in scsi_add_host_with_dma()
267 	pm_runtime_set_active(&shost->shost_gendev);  in scsi_add_host_with_dma()
268 	pm_runtime_enable(&shost->shost_gendev);  in scsi_add_host_with_dma()
269 	device_enable_async_suspend(&shost->shost_gendev);  in scsi_add_host_with_dma()
271 	error = device_add(&shost->shost_gendev);  in scsi_add_host_with_dma()
275 	scsi_host_set_state(shost, SHOST_RUNNING);  in scsi_add_host_with_dma()
276 	get_device(shost->shost_gendev.parent);  in scsi_add_host_with_dma()
278 	device_enable_async_suspend(&shost->shost_dev);  in scsi_add_host_with_dma()
280 	get_device(&shost->shost_gendev);  in scsi_add_host_with_dma()
281 	error = device_add(&shost->shost_dev);  in scsi_add_host_with_dma()
285 	if (shost->transportt->host_size) {  in scsi_add_host_with_dma()
286 		shost->shost_data = kzalloc(shost->transportt->host_size,  in scsi_add_host_with_dma()
288 		if (shost->shost_data == NULL) {  in scsi_add_host_with_dma()
294 	if (shost->transportt->create_work_queue) {  in scsi_add_host_with_dma()
295 		shost->work_q = alloc_workqueue(  in scsi_add_host_with_dma()
298 			shost->host_no);  in scsi_add_host_with_dma()
300 		if (!shost->work_q) {  in scsi_add_host_with_dma()
306 	error = scsi_sysfs_add_host(shost);  in scsi_add_host_with_dma()
310 	scsi_proc_host_add(shost);  in scsi_add_host_with_dma()
311 	scsi_autopm_put_host(shost);  in scsi_add_host_with_dma()
319 	device_del(&shost->shost_dev);  in scsi_add_host_with_dma()
325 	put_device(&shost->shost_dev);  in scsi_add_host_with_dma()
326 	device_del(&shost->shost_gendev);  in scsi_add_host_with_dma()
328 	device_disable_async_suspend(&shost->shost_gendev);  in scsi_add_host_with_dma()
329 	pm_runtime_disable(&shost->shost_gendev);  in scsi_add_host_with_dma()
330 	pm_runtime_set_suspended(&shost->shost_gendev);  in scsi_add_host_with_dma()
331 	pm_runtime_put_noidle(&shost->shost_gendev);  in scsi_add_host_with_dma()
332 	kref_put(&shost->tagset_refcnt, scsi_mq_free_tags);  in scsi_add_host_with_dma()
340 	struct Scsi_Host *shost = dev_to_shost(dev);  in scsi_host_dev_release()  local
346 	if (shost->tmf_work_q)  in scsi_host_dev_release()
347 		destroy_workqueue(shost->tmf_work_q);  in scsi_host_dev_release()
348 	if (shost->ehandler)  in scsi_host_dev_release()
349 		kthread_stop(shost->ehandler);  in scsi_host_dev_release()
350 	if (shost->work_q)  in scsi_host_dev_release()
351 		destroy_workqueue(shost->work_q);  in scsi_host_dev_release()
353 	if (shost->shost_state == SHOST_CREATED) {  in scsi_host_dev_release()
361 		scsi_proc_hostdir_rm(shost->hostt);  in scsi_host_dev_release()
362 		kfree(dev_name(&shost->shost_dev));  in scsi_host_dev_release()
365 	kfree(shost->shost_data);  in scsi_host_dev_release()
367 	ida_free(&host_index_ida, shost->host_no);  in scsi_host_dev_release()
369 	if (shost->shost_state != SHOST_CREATED)  in scsi_host_dev_release()
371 	kfree(shost);  in scsi_host_dev_release()
394 	struct Scsi_Host *shost;  in scsi_host_alloc()  local
397 	shost = kzalloc(sizeof(struct Scsi_Host) + privsize, GFP_KERNEL);  in scsi_host_alloc()
398 	if (!shost)  in scsi_host_alloc()
401 	shost->host_lock = &shost->default_lock;  in scsi_host_alloc()
402 	spin_lock_init(shost->host_lock);  in scsi_host_alloc()
403 	shost->shost_state = SHOST_CREATED;  in scsi_host_alloc()
404 	INIT_LIST_HEAD(&shost->__devices);  in scsi_host_alloc()
405 	INIT_LIST_HEAD(&shost->__targets);  in scsi_host_alloc()
406 	INIT_LIST_HEAD(&shost->eh_abort_list);  in scsi_host_alloc()
407 	INIT_LIST_HEAD(&shost->eh_cmd_q);  in scsi_host_alloc()
408 	INIT_LIST_HEAD(&shost->starved_list);  in scsi_host_alloc()
409 	init_waitqueue_head(&shost->host_wait);  in scsi_host_alloc()
410 	mutex_init(&shost->scan_mutex);  in scsi_host_alloc()
414 		kfree(shost);  in scsi_host_alloc()
417 	shost->host_no = index;  in scsi_host_alloc()
419 	shost->dma_channel = 0xff;  in scsi_host_alloc()
422 	shost->max_channel = 0;  in scsi_host_alloc()
423 	shost->max_id = 8;  in scsi_host_alloc()
424 	shost->max_lun = 8;  in scsi_host_alloc()
427 	shost->transportt = &blank_transport_template;  in scsi_host_alloc()
435 	shost->max_cmd_len = 12;  in scsi_host_alloc()
436 	shost->hostt = sht;  in scsi_host_alloc()
437 	shost->this_id = sht->this_id;  in scsi_host_alloc()
438 	shost->can_queue = sht->can_queue;  in scsi_host_alloc()
439 	shost->sg_tablesize = sht->sg_tablesize;  in scsi_host_alloc()
440 	shost->sg_prot_tablesize = sht->sg_prot_tablesize;  in scsi_host_alloc()
441 	shost->cmd_per_lun = sht->cmd_per_lun;  in scsi_host_alloc()
442 	shost->no_write_same = sht->no_write_same;  in scsi_host_alloc()
443 	shost->host_tagset = sht->host_tagset;  in scsi_host_alloc()
444 	shost->queuecommand_may_block = sht->queuecommand_may_block;  in scsi_host_alloc()
447 		shost->eh_deadline = -1;  in scsi_host_alloc()
449 		shost_printk(KERN_WARNING, shost,  in scsi_host_alloc()
452 		shost->eh_deadline = INT_MAX;  in scsi_host_alloc()
454 		shost->eh_deadline = shost_eh_deadline * HZ;  in scsi_host_alloc()
458 		shost->active_mode = MODE_INITIATOR;  in scsi_host_alloc()
460 		shost->active_mode = sht->supported_mode;  in scsi_host_alloc()
463 		shost->max_host_blocked = sht->max_host_blocked;  in scsi_host_alloc()
465 		shost->max_host_blocked = SCSI_DEFAULT_HOST_BLOCKED;  in scsi_host_alloc()
472 		shost->max_sectors = sht->max_sectors;  in scsi_host_alloc()
474 		shost->max_sectors = SCSI_DEFAULT_MAX_SECTORS;  in scsi_host_alloc()
477 		shost->max_segment_size = sht->max_segment_size;  in scsi_host_alloc()
479 		shost->max_segment_size = BLK_MAX_SEGMENT_SIZE;  in scsi_host_alloc()
483 		shost->dma_alignment = sht->dma_alignment;  in scsi_host_alloc()
485 		shost->dma_alignment = 3;  in scsi_host_alloc()
491 		shost->dma_boundary = sht->dma_boundary;  in scsi_host_alloc()
493 		shost->dma_boundary = 0xffffffff;  in scsi_host_alloc()
496 		shost->virt_boundary_mask = sht->virt_boundary_mask;  in scsi_host_alloc()
498 	device_initialize(&shost->shost_gendev);  in scsi_host_alloc()
499 	dev_set_name(&shost->shost_gendev, "host%d", shost->host_no);  in scsi_host_alloc()
500 	shost->shost_gendev.bus = &scsi_bus_type;  in scsi_host_alloc()
501 	shost->shost_gendev.type = &scsi_host_type;  in scsi_host_alloc()
502 	scsi_enable_async_suspend(&shost->shost_gendev);  in scsi_host_alloc()
504 	device_initialize(&shost->shost_dev);  in scsi_host_alloc()
505 	shost->shost_dev.parent = &shost->shost_gendev;  in scsi_host_alloc()
506 	shost->shost_dev.class = &shost_class;  in scsi_host_alloc()
507 	dev_set_name(&shost->shost_dev, "host%d", shost->host_no);  in scsi_host_alloc()
508 	shost->shost_dev.groups = sht->shost_groups;  in scsi_host_alloc()
510 	shost->ehandler = kthread_run(scsi_error_handler, shost,  in scsi_host_alloc()
511 			"scsi_eh_%d", shost->host_no);  in scsi_host_alloc()
512 	if (IS_ERR(shost->ehandler)) {  in scsi_host_alloc()
513 		shost_printk(KERN_WARNING, shost,  in scsi_host_alloc()
515 			PTR_ERR(shost->ehandler));  in scsi_host_alloc()
516 		shost->ehandler = NULL;  in scsi_host_alloc()
520 	shost->tmf_work_q = alloc_workqueue("scsi_tmf_%d",  in scsi_host_alloc()
522 					   1, shost->host_no);  in scsi_host_alloc()
523 	if (!shost->tmf_work_q) {  in scsi_host_alloc()
524 		shost_printk(KERN_WARNING, shost,  in scsi_host_alloc()
528 	if (scsi_proc_hostdir_add(shost->hostt) < 0)  in scsi_host_alloc()
530 	return shost;  in scsi_host_alloc()
537 	put_device(&shost->shost_gendev);  in scsi_host_alloc()
566 	struct Scsi_Host *shost = NULL;  in scsi_host_lookup()  local
571 		shost = scsi_host_get(class_to_shost(cdev));  in scsi_host_lookup()
574 	return shost;  in scsi_host_lookup()
582 struct Scsi_Host *scsi_host_get(struct Scsi_Host *shost)  in scsi_host_get()  argument
584 	if ((shost->shost_state == SHOST_DEL) ||  in scsi_host_get()
585 		!get_device(&shost->shost_gendev))  in scsi_host_get()
587 	return shost;  in scsi_host_get()
606 int scsi_host_busy(struct Scsi_Host *shost)  in scsi_host_busy()  argument
610 	blk_mq_tagset_busy_iter(&shost->tag_set,  in scsi_host_busy()
620 void scsi_host_put(struct Scsi_Host *shost)  in scsi_host_put()  argument
622 	put_device(&shost->shost_gendev);  in scsi_host_put()
653 int scsi_queue_work(struct Scsi_Host *shost, struct work_struct *work)  in scsi_queue_work()  argument
655 	if (unlikely(!shost->work_q)) {  in scsi_queue_work()
656 		shost_printk(KERN_ERR, shost,  in scsi_queue_work()
658 			"when no workqueue created.\n", shost->hostt->name);  in scsi_queue_work()
664 	return queue_work(shost->work_q, work);  in scsi_queue_work()
672 void scsi_flush_work(struct Scsi_Host *shost)  in scsi_flush_work()  argument
674 	if (!shost->work_q) {  in scsi_flush_work()
675 		shost_printk(KERN_ERR, shost,  in scsi_flush_work()
677 			"when no workqueue created.\n", shost->hostt->name);  in scsi_flush_work()
682 	flush_workqueue(shost->work_q);  in scsi_flush_work()
708 void scsi_host_complete_all_commands(struct Scsi_Host *shost,  in scsi_host_complete_all_commands()  argument
711 	blk_mq_tagset_busy_iter(&shost->tag_set, complete_all_cmds_iter,  in scsi_host_complete_all_commands()
738 void scsi_host_busy_iter(struct Scsi_Host *shost,  in scsi_host_busy_iter()  argument
747 	blk_mq_tagset_busy_iter(&shost->tag_set, __scsi_host_busy_iter_fn,  in scsi_host_busy_iter()