66 int scsi_host_set_state(struct Scsi_Host *shost, enum scsi_host_state state)  in scsi_host_set_state()  argument
68 	enum scsi_host_state oldstate = shost->shost_state;  in scsi_host_set_state()
139 	shost->shost_state = state;  in scsi_host_set_state()
144 				shost_printk(KERN_ERR, shost,  in scsi_host_set_state()
157 void scsi_remove_host(struct Scsi_Host *shost)  in scsi_remove_host()  argument
161 	mutex_lock(&shost->scan_mutex);  in scsi_remove_host()
162 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_remove_host()
163 	if (scsi_host_set_state(shost, SHOST_CANCEL))  in scsi_remove_host()
164 		if (scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY)) {  in scsi_remove_host()
165 			spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_remove_host()
166 			mutex_unlock(&shost->scan_mutex);  in scsi_remove_host()
169 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_remove_host()
171 	scsi_autopm_get_host(shost);  in scsi_remove_host()
172 	flush_workqueue(shost->tmf_work_q);  in scsi_remove_host()
173 	scsi_forget_host(shost);  in scsi_remove_host()
174 	mutex_unlock(&shost->scan_mutex);  in scsi_remove_host()
175 	scsi_proc_host_rm(shost);  in scsi_remove_host()
177 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_remove_host()
178 	if (scsi_host_set_state(shost, SHOST_DEL))  in scsi_remove_host()
179 		BUG_ON(scsi_host_set_state(shost, SHOST_DEL_RECOVERY));  in scsi_remove_host()
180 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_remove_host()
182 	transport_unregister_device(&shost->shost_gendev);  in scsi_remove_host()
183 	device_unregister(&shost->shost_dev);  in scsi_remove_host()
184 	device_del(&shost->shost_gendev);  in scsi_remove_host()
201 int scsi_add_host_with_dma(struct Scsi_Host *shost, struct device *dev,  in scsi_add_host_with_dma()  argument
204 	struct scsi_host_template *sht = shost->hostt;  in scsi_add_host_with_dma()
207 	shost_printk(KERN_INFO, shost, "%s\n",  in scsi_add_host_with_dma()
208 			sht->info ? sht->info(shost) : sht->name);  in scsi_add_host_with_dma()
210 	if (!shost->can_queue) {  in scsi_add_host_with_dma()
211 		shost_printk(KERN_ERR, shost,  in scsi_add_host_with_dma()
216 	if (shost_use_blk_mq(shost)) {  in scsi_add_host_with_dma()
217 		error = scsi_mq_setup_tags(shost);  in scsi_add_host_with_dma()
221 		shost->bqt = blk_init_tags(shost->can_queue,  in scsi_add_host_with_dma()
222 				shost->hostt->tag_alloc_policy);  in scsi_add_host_with_dma()
223 		if (!shost->bqt) {  in scsi_add_host_with_dma()
237 	error = scsi_setup_command_freelist(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()
249 	error = device_add(&shost->shost_gendev);  in scsi_add_host_with_dma()
253 	pm_runtime_set_active(&shost->shost_gendev);  in scsi_add_host_with_dma()
254 	pm_runtime_enable(&shost->shost_gendev);  in scsi_add_host_with_dma()
255 	device_enable_async_suspend(&shost->shost_gendev);  in scsi_add_host_with_dma()
257 	scsi_host_set_state(shost, SHOST_RUNNING);  in scsi_add_host_with_dma()
258 	get_device(shost->shost_gendev.parent);  in scsi_add_host_with_dma()
260 	device_enable_async_suspend(&shost->shost_dev);  in scsi_add_host_with_dma()
262 	error = device_add(&shost->shost_dev);  in scsi_add_host_with_dma()
266 	get_device(&shost->shost_gendev);  in scsi_add_host_with_dma()
268 	if (shost->transportt->host_size) {  in scsi_add_host_with_dma()
269 		shost->shost_data = kzalloc(shost->transportt->host_size,  in scsi_add_host_with_dma()
271 		if (shost->shost_data == NULL) {  in scsi_add_host_with_dma()
277 	if (shost->transportt->create_work_queue) {  in scsi_add_host_with_dma()
278 		snprintf(shost->work_q_name, sizeof(shost->work_q_name),  in scsi_add_host_with_dma()
279 			 "scsi_wq_%d", shost->host_no);  in scsi_add_host_with_dma()
280 		shost->work_q = create_singlethread_workqueue(  in scsi_add_host_with_dma()
281 					shost->work_q_name);  in scsi_add_host_with_dma()
282 		if (!shost->work_q) {  in scsi_add_host_with_dma()
288 	error = scsi_sysfs_add_host(shost);  in scsi_add_host_with_dma()
292 	scsi_proc_host_add(shost);  in scsi_add_host_with_dma()
296 	if (shost->work_q)  in scsi_add_host_with_dma()
297 		destroy_workqueue(shost->work_q);  in scsi_add_host_with_dma()
299 	kfree(shost->shost_data);  in scsi_add_host_with_dma()
301 	device_del(&shost->shost_dev);  in scsi_add_host_with_dma()
303 	device_del(&shost->shost_gendev);  in scsi_add_host_with_dma()
305 	scsi_destroy_command_freelist(shost);  in scsi_add_host_with_dma()
307 	if (shost_use_blk_mq(shost))  in scsi_add_host_with_dma()
308 		scsi_mq_destroy_tags(shost);  in scsi_add_host_with_dma()
316 	struct Scsi_Host *shost = dev_to_shost(dev);  in scsi_host_dev_release()  local
321 	scsi_proc_hostdir_rm(shost->hostt);  in scsi_host_dev_release()
323 	if (shost->tmf_work_q)  in scsi_host_dev_release()
324 		destroy_workqueue(shost->tmf_work_q);  in scsi_host_dev_release()
325 	if (shost->ehandler)  in scsi_host_dev_release()
326 		kthread_stop(shost->ehandler);  in scsi_host_dev_release()
327 	if (shost->work_q)  in scsi_host_dev_release()
328 		destroy_workqueue(shost->work_q);  in scsi_host_dev_release()
329 	q = shost->uspace_req_q;  in scsi_host_dev_release()
336 	if (shost->shost_state == SHOST_CREATED) {  in scsi_host_dev_release()
344 		kfree(dev_name(&shost->shost_dev));  in scsi_host_dev_release()
347 	scsi_destroy_command_freelist(shost);  in scsi_host_dev_release()
348 	if (shost_use_blk_mq(shost)) {  in scsi_host_dev_release()
349 		if (shost->tag_set.tags)  in scsi_host_dev_release()
350 			scsi_mq_destroy_tags(shost);  in scsi_host_dev_release()
352 		if (shost->bqt)  in scsi_host_dev_release()
353 			blk_free_tags(shost->bqt);  in scsi_host_dev_release()
356 	kfree(shost->shost_data);  in scsi_host_dev_release()
360 	kfree(shost);  in scsi_host_dev_release()
389 	struct Scsi_Host *shost;  in scsi_host_alloc()  local
395 	shost = kzalloc(sizeof(struct Scsi_Host) + privsize, gfp_mask);  in scsi_host_alloc()
396 	if (!shost)  in scsi_host_alloc()
399 	shost->host_lock = &shost->default_lock;  in scsi_host_alloc()
400 	spin_lock_init(shost->host_lock);  in scsi_host_alloc()
401 	shost->shost_state = SHOST_CREATED;  in scsi_host_alloc()
402 	INIT_LIST_HEAD(&shost->__devices);  in scsi_host_alloc()
403 	INIT_LIST_HEAD(&shost->__targets);  in scsi_host_alloc()
404 	INIT_LIST_HEAD(&shost->eh_cmd_q);  in scsi_host_alloc()
405 	INIT_LIST_HEAD(&shost->starved_list);  in scsi_host_alloc()
406 	init_waitqueue_head(&shost->host_wait);  in scsi_host_alloc()
407 	mutex_init(&shost->scan_mutex);  in scsi_host_alloc()
413 	shost->host_no = atomic_inc_return(&scsi_host_next_hn) - 1;  in scsi_host_alloc()
414 	shost->dma_channel = 0xff;  in scsi_host_alloc()
417 	shost->max_channel = 0;  in scsi_host_alloc()
418 	shost->max_id = 8;  in scsi_host_alloc()
419 	shost->max_lun = 8;  in scsi_host_alloc()
422 	shost->transportt = &blank_transport_template;  in scsi_host_alloc()
430 	shost->max_cmd_len = 12;  in scsi_host_alloc()
431 	shost->hostt = sht;  in scsi_host_alloc()
432 	shost->this_id = sht->this_id;  in scsi_host_alloc()
433 	shost->can_queue = sht->can_queue;  in scsi_host_alloc()
434 	shost->sg_tablesize = sht->sg_tablesize;  in scsi_host_alloc()
435 	shost->sg_prot_tablesize = sht->sg_prot_tablesize;  in scsi_host_alloc()
436 	shost->cmd_per_lun = sht->cmd_per_lun;  in scsi_host_alloc()
437 	shost->unchecked_isa_dma = sht->unchecked_isa_dma;  in scsi_host_alloc()
438 	shost->use_clustering = sht->use_clustering;  in scsi_host_alloc()
439 	shost->no_write_same = sht->no_write_same;  in scsi_host_alloc()
442 		shost->eh_deadline = -1;  in scsi_host_alloc()
444 		shost_printk(KERN_WARNING, shost,  in scsi_host_alloc()
447 		shost->eh_deadline = INT_MAX;  in scsi_host_alloc()
449 		shost->eh_deadline = shost_eh_deadline * HZ;  in scsi_host_alloc()
453 		shost->active_mode = MODE_INITIATOR;  in scsi_host_alloc()
455 		shost->active_mode = sht->supported_mode;  in scsi_host_alloc()
458 		shost->max_host_blocked = sht->max_host_blocked;  in scsi_host_alloc()
460 		shost->max_host_blocked = SCSI_DEFAULT_HOST_BLOCKED;  in scsi_host_alloc()
467 		shost->max_sectors = sht->max_sectors;  in scsi_host_alloc()
469 		shost->max_sectors = SCSI_DEFAULT_MAX_SECTORS;  in scsi_host_alloc()
475 		shost->dma_boundary = sht->dma_boundary;  in scsi_host_alloc()
477 		shost->dma_boundary = 0xffffffff;  in scsi_host_alloc()
479 	shost->use_blk_mq = scsi_use_blk_mq && !shost->hostt->disable_blk_mq;  in scsi_host_alloc()
481 	device_initialize(&shost->shost_gendev);  in scsi_host_alloc()
482 	dev_set_name(&shost->shost_gendev, "host%d", shost->host_no);  in scsi_host_alloc()
483 	shost->shost_gendev.bus = &scsi_bus_type;  in scsi_host_alloc()
484 	shost->shost_gendev.type = &scsi_host_type;  in scsi_host_alloc()
486 	device_initialize(&shost->shost_dev);  in scsi_host_alloc()
487 	shost->shost_dev.parent = &shost->shost_gendev;  in scsi_host_alloc()
488 	shost->shost_dev.class = &shost_class;  in scsi_host_alloc()
489 	dev_set_name(&shost->shost_dev, "host%d", shost->host_no);  in scsi_host_alloc()
490 	shost->shost_dev.groups = scsi_sysfs_shost_attr_groups;  in scsi_host_alloc()
492 	shost->ehandler = kthread_run(scsi_error_handler, shost,  in scsi_host_alloc()
493 			"scsi_eh_%d", shost->host_no);  in scsi_host_alloc()
494 	if (IS_ERR(shost->ehandler)) {  in scsi_host_alloc()
495 		shost_printk(KERN_WARNING, shost,  in scsi_host_alloc()
497 			PTR_ERR(shost->ehandler));  in scsi_host_alloc()
501 	shost->tmf_work_q = alloc_workqueue("scsi_tmf_%d",  in scsi_host_alloc()
503 					   1, shost->host_no);  in scsi_host_alloc()
504 	if (!shost->tmf_work_q) {  in scsi_host_alloc()
505 		shost_printk(KERN_WARNING, shost,  in scsi_host_alloc()
509 	scsi_proc_hostdir_add(shost->hostt);  in scsi_host_alloc()
510 	return shost;  in scsi_host_alloc()
513 	kthread_stop(shost->ehandler);  in scsi_host_alloc()
515 	kfree(shost);  in scsi_host_alloc()
522 	struct Scsi_Host *shost = scsi_host_alloc(sht, privsize);  in scsi_register()  local
530 	if (shost)  in scsi_register()
531 		list_add_tail(&shost->sht_legacy_list, &sht->legacy_hosts);  in scsi_register()
532 	return shost;  in scsi_register()
536 void scsi_unregister(struct Scsi_Host *shost)  in scsi_unregister()  argument
538 	list_del(&shost->sht_legacy_list);  in scsi_unregister()
539 	scsi_host_put(shost);  in scsi_unregister()
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()
595 void scsi_host_put(struct Scsi_Host *shost)  in scsi_host_put()  argument
597 	put_device(&shost->shost_gendev);  in scsi_host_put()
627 int scsi_queue_work(struct Scsi_Host *shost, struct work_struct *work)  in scsi_queue_work()  argument
629 	if (unlikely(!shost->work_q)) {  in scsi_queue_work()
630 		shost_printk(KERN_ERR, shost,  in scsi_queue_work()
632 			"when no workqueue created.\n", shost->hostt->name);  in scsi_queue_work()
638 	return queue_work(shost->work_q, work);  in scsi_queue_work()
646 void scsi_flush_work(struct Scsi_Host *shost)  in scsi_flush_work()  argument
648 	if (!shost->work_q) {  in scsi_flush_work()
649 		shost_printk(KERN_ERR, shost,  in scsi_flush_work()
651 			"when no workqueue created.\n", shost->hostt->name);  in scsi_flush_work()
656 	flush_workqueue(shost->work_q);  in scsi_flush_work()