74 int scsi_host_set_state(struct Scsi_Host *shost, enum scsi_host_state state)  in scsi_host_set_state()  argument
76 	enum scsi_host_state oldstate = shost->shost_state;  in scsi_host_set_state()
147 	shost->shost_state = state;  in scsi_host_set_state()
152 				shost_printk(KERN_ERR, shost,  in scsi_host_set_state()
164 void scsi_remove_host(struct Scsi_Host *shost)  in scsi_remove_host()  argument
168 	mutex_lock(&shost->scan_mutex);  in scsi_remove_host()
169 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_remove_host()
170 	if (scsi_host_set_state(shost, SHOST_CANCEL))  in scsi_remove_host()
171 		if (scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY)) {  in scsi_remove_host()
172 			spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_remove_host()
173 			mutex_unlock(&shost->scan_mutex);  in scsi_remove_host()
176 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_remove_host()
178 	scsi_autopm_get_host(shost);  in scsi_remove_host()
179 	flush_workqueue(shost->tmf_work_q);  in scsi_remove_host()
180 	scsi_forget_host(shost);  in scsi_remove_host()
181 	mutex_unlock(&shost->scan_mutex);  in scsi_remove_host()
182 	scsi_proc_host_rm(shost);  in scsi_remove_host()
184 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_remove_host()
185 	if (scsi_host_set_state(shost, SHOST_DEL))  in scsi_remove_host()
186 		BUG_ON(scsi_host_set_state(shost, SHOST_DEL_RECOVERY));  in scsi_remove_host()
187 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_remove_host()
189 	transport_unregister_device(&shost->shost_gendev);  in scsi_remove_host()
190 	device_unregister(&shost->shost_dev);  in scsi_remove_host()
191 	device_del(&shost->shost_gendev);  in scsi_remove_host()
208 int scsi_add_host_with_dma(struct Scsi_Host *shost, struct device *dev,  in scsi_add_host_with_dma()  argument
211 	struct scsi_host_template *sht = shost->hostt;  in scsi_add_host_with_dma()
214 	shost_printk(KERN_INFO, shost, "%s\n",  in scsi_add_host_with_dma()
215 			sht->info ? sht->info(shost) : sht->name);  in scsi_add_host_with_dma()
217 	if (!shost->can_queue) {  in scsi_add_host_with_dma()
218 		shost_printk(KERN_ERR, shost,  in scsi_add_host_with_dma()
223 	error = scsi_init_sense_cache(shost);  in scsi_add_host_with_dma()
227 	error = scsi_mq_setup_tags(shost);  in scsi_add_host_with_dma()
231 	if (!shost->shost_gendev.parent)  in scsi_add_host_with_dma()
232 		shost->shost_gendev.parent = dev ? dev : &platform_bus;  in scsi_add_host_with_dma()
234 		dma_dev = shost->shost_gendev.parent;  in scsi_add_host_with_dma()
236 	shost->dma_dev = dma_dev;  in scsi_add_host_with_dma()
243 	pm_runtime_get_noresume(&shost->shost_gendev);  in scsi_add_host_with_dma()
244 	pm_runtime_set_active(&shost->shost_gendev);  in scsi_add_host_with_dma()
245 	pm_runtime_enable(&shost->shost_gendev);  in scsi_add_host_with_dma()
246 	device_enable_async_suspend(&shost->shost_gendev);  in scsi_add_host_with_dma()
248 	error = device_add(&shost->shost_gendev);  in scsi_add_host_with_dma()
252 	scsi_host_set_state(shost, SHOST_RUNNING);  in scsi_add_host_with_dma()
253 	get_device(shost->shost_gendev.parent);  in scsi_add_host_with_dma()
255 	device_enable_async_suspend(&shost->shost_dev);  in scsi_add_host_with_dma()
257 	error = device_add(&shost->shost_dev);  in scsi_add_host_with_dma()
261 	get_device(&shost->shost_gendev);  in scsi_add_host_with_dma()
263 	if (shost->transportt->host_size) {  in scsi_add_host_with_dma()
264 		shost->shost_data = kzalloc(shost->transportt->host_size,  in scsi_add_host_with_dma()
266 		if (shost->shost_data == NULL) {  in scsi_add_host_with_dma()
272 	if (shost->transportt->create_work_queue) {  in scsi_add_host_with_dma()
273 		snprintf(shost->work_q_name, sizeof(shost->work_q_name),  in scsi_add_host_with_dma()
274 			 "scsi_wq_%d", shost->host_no);  in scsi_add_host_with_dma()
275 		shost->work_q = alloc_workqueue("%s",  in scsi_add_host_with_dma()
277 			1, shost->work_q_name);  in scsi_add_host_with_dma()
279 		if (!shost->work_q) {  in scsi_add_host_with_dma()
285 	error = scsi_sysfs_add_host(shost);  in scsi_add_host_with_dma()
289 	scsi_proc_host_add(shost);  in scsi_add_host_with_dma()
290 	scsi_autopm_put_host(shost);  in scsi_add_host_with_dma()
294 	if (shost->work_q)  in scsi_add_host_with_dma()
295 		destroy_workqueue(shost->work_q);  in scsi_add_host_with_dma()
297 	kfree(shost->shost_data);  in scsi_add_host_with_dma()
299 	device_del(&shost->shost_dev);  in scsi_add_host_with_dma()
301 	device_del(&shost->shost_gendev);  in scsi_add_host_with_dma()
303 	device_disable_async_suspend(&shost->shost_gendev);  in scsi_add_host_with_dma()
304 	pm_runtime_disable(&shost->shost_gendev);  in scsi_add_host_with_dma()
305 	pm_runtime_set_suspended(&shost->shost_gendev);  in scsi_add_host_with_dma()
306 	pm_runtime_put_noidle(&shost->shost_gendev);  in scsi_add_host_with_dma()
307 	scsi_mq_destroy_tags(shost);  in scsi_add_host_with_dma()
315 	struct Scsi_Host *shost = dev_to_shost(dev);  in scsi_host_dev_release()  local
318 	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()
330 	if (shost->shost_state == SHOST_CREATED) {  in scsi_host_dev_release()
338 		kfree(dev_name(&shost->shost_dev));  in scsi_host_dev_release()
341 	if (shost->tag_set.tags)  in scsi_host_dev_release()
342 		scsi_mq_destroy_tags(shost);  in scsi_host_dev_release()
344 	kfree(shost->shost_data);  in scsi_host_dev_release()
346 	ida_simple_remove(&host_index_ida, shost->host_no);  in scsi_host_dev_release()
350 	kfree(shost);  in scsi_host_dev_release()
373 	struct Scsi_Host *shost;  in scsi_host_alloc()  local
380 	shost = kzalloc(sizeof(struct Scsi_Host) + privsize, gfp_mask);  in scsi_host_alloc()
381 	if (!shost)  in scsi_host_alloc()
384 	shost->host_lock = &shost->default_lock;  in scsi_host_alloc()
385 	spin_lock_init(shost->host_lock);  in scsi_host_alloc()
386 	shost->shost_state = SHOST_CREATED;  in scsi_host_alloc()
387 	INIT_LIST_HEAD(&shost->__devices);  in scsi_host_alloc()
388 	INIT_LIST_HEAD(&shost->__targets);  in scsi_host_alloc()
389 	INIT_LIST_HEAD(&shost->eh_cmd_q);  in scsi_host_alloc()
390 	INIT_LIST_HEAD(&shost->starved_list);  in scsi_host_alloc()
391 	init_waitqueue_head(&shost->host_wait);  in scsi_host_alloc()
392 	mutex_init(&shost->scan_mutex);  in scsi_host_alloc()
397 	shost->host_no = index;  in scsi_host_alloc()
399 	shost->dma_channel = 0xff;  in scsi_host_alloc()
402 	shost->max_channel = 0;  in scsi_host_alloc()
403 	shost->max_id = 8;  in scsi_host_alloc()
404 	shost->max_lun = 8;  in scsi_host_alloc()
407 	shost->transportt = &blank_transport_template;  in scsi_host_alloc()
415 	shost->max_cmd_len = 12;  in scsi_host_alloc()
416 	shost->hostt = sht;  in scsi_host_alloc()
417 	shost->this_id = sht->this_id;  in scsi_host_alloc()
418 	shost->can_queue = sht->can_queue;  in scsi_host_alloc()
419 	shost->sg_tablesize = sht->sg_tablesize;  in scsi_host_alloc()
420 	shost->sg_prot_tablesize = sht->sg_prot_tablesize;  in scsi_host_alloc()
421 	shost->cmd_per_lun = sht->cmd_per_lun;  in scsi_host_alloc()
422 	shost->unchecked_isa_dma = sht->unchecked_isa_dma;  in scsi_host_alloc()
423 	shost->no_write_same = sht->no_write_same;  in scsi_host_alloc()
424 	shost->host_tagset = sht->host_tagset;  in scsi_host_alloc()
427 		shost->eh_deadline = -1;  in scsi_host_alloc()
429 		shost_printk(KERN_WARNING, shost,  in scsi_host_alloc()
432 		shost->eh_deadline = INT_MAX;  in scsi_host_alloc()
434 		shost->eh_deadline = shost_eh_deadline * HZ;  in scsi_host_alloc()
438 		shost->active_mode = MODE_INITIATOR;  in scsi_host_alloc()
440 		shost->active_mode = sht->supported_mode;  in scsi_host_alloc()
443 		shost->max_host_blocked = sht->max_host_blocked;  in scsi_host_alloc()
445 		shost->max_host_blocked = SCSI_DEFAULT_HOST_BLOCKED;  in scsi_host_alloc()
452 		shost->max_sectors = sht->max_sectors;  in scsi_host_alloc()
454 		shost->max_sectors = SCSI_DEFAULT_MAX_SECTORS;  in scsi_host_alloc()
457 		shost->max_segment_size = sht->max_segment_size;  in scsi_host_alloc()
459 		shost->max_segment_size = BLK_MAX_SEGMENT_SIZE;  in scsi_host_alloc()
465 		shost->dma_boundary = sht->dma_boundary;  in scsi_host_alloc()
467 		shost->dma_boundary = 0xffffffff;  in scsi_host_alloc()
470 		shost->virt_boundary_mask = sht->virt_boundary_mask;  in scsi_host_alloc()
472 	device_initialize(&shost->shost_gendev);  in scsi_host_alloc()
473 	dev_set_name(&shost->shost_gendev, "host%d", shost->host_no);  in scsi_host_alloc()
474 	shost->shost_gendev.bus = &scsi_bus_type;  in scsi_host_alloc()
475 	shost->shost_gendev.type = &scsi_host_type;  in scsi_host_alloc()
477 	device_initialize(&shost->shost_dev);  in scsi_host_alloc()
478 	shost->shost_dev.parent = &shost->shost_gendev;  in scsi_host_alloc()
479 	shost->shost_dev.class = &shost_class;  in scsi_host_alloc()
480 	dev_set_name(&shost->shost_dev, "host%d", shost->host_no);  in scsi_host_alloc()
481 	shost->shost_dev.groups = scsi_sysfs_shost_attr_groups;  in scsi_host_alloc()
483 	shost->ehandler = kthread_run(scsi_error_handler, shost,  in scsi_host_alloc()
484 			"scsi_eh_%d", shost->host_no);  in scsi_host_alloc()
485 	if (IS_ERR(shost->ehandler)) {  in scsi_host_alloc()
486 		shost_printk(KERN_WARNING, shost,  in scsi_host_alloc()
488 			PTR_ERR(shost->ehandler));  in scsi_host_alloc()
492 	shost->tmf_work_q = alloc_workqueue("scsi_tmf_%d",  in scsi_host_alloc()
494 					   1, shost->host_no);  in scsi_host_alloc()
495 	if (!shost->tmf_work_q) {  in scsi_host_alloc()
496 		shost_printk(KERN_WARNING, shost,  in scsi_host_alloc()
500 	scsi_proc_hostdir_add(shost->hostt);  in scsi_host_alloc()
501 	return shost;  in scsi_host_alloc()
504 	kthread_stop(shost->ehandler);  in scsi_host_alloc()
506 	ida_simple_remove(&host_index_ida, shost->host_no);  in scsi_host_alloc()
508 	kfree(shost);  in scsi_host_alloc()
536 	struct Scsi_Host *shost = NULL;  in scsi_host_lookup()  local
541 		shost = scsi_host_get(class_to_shost(cdev));  in scsi_host_lookup()
544 	return shost;  in scsi_host_lookup()
552 struct Scsi_Host *scsi_host_get(struct Scsi_Host *shost)  in scsi_host_get()  argument
554 	if ((shost->shost_state == SHOST_DEL) ||  in scsi_host_get()
555 		!get_device(&shost->shost_gendev))  in scsi_host_get()
557 	return shost;  in scsi_host_get()
577 int scsi_host_busy(struct Scsi_Host *shost)  in scsi_host_busy()  argument
581 	blk_mq_tagset_busy_iter(&shost->tag_set,  in scsi_host_busy()
591 void scsi_host_put(struct Scsi_Host *shost)  in scsi_host_put()  argument
593 	put_device(&shost->shost_gendev);  in scsi_host_put()
624 int scsi_queue_work(struct Scsi_Host *shost, struct work_struct *work)  in scsi_queue_work()  argument
626 	if (unlikely(!shost->work_q)) {  in scsi_queue_work()
627 		shost_printk(KERN_ERR, shost,  in scsi_queue_work()
629 			"when no workqueue created.\n", shost->hostt->name);  in scsi_queue_work()
635 	return queue_work(shost->work_q, work);  in scsi_queue_work()
643 void scsi_flush_work(struct Scsi_Host *shost)  in scsi_flush_work()  argument
645 	if (!shost->work_q) {  in scsi_flush_work()
646 		shost_printk(KERN_ERR, shost,  in scsi_flush_work()
648 			"when no workqueue created.\n", shost->hostt->name);  in scsi_flush_work()
653 	flush_workqueue(shost->work_q);  in scsi_flush_work()
678 void scsi_host_complete_all_commands(struct Scsi_Host *shost, int status)  in scsi_host_complete_all_commands()  argument
680 	blk_mq_tagset_busy_iter(&shost->tag_set, complete_all_cmds_iter,  in scsi_host_complete_all_commands()
708 void scsi_host_busy_iter(struct Scsi_Host *shost,  in scsi_host_busy_iter()  argument
717 	blk_mq_tagset_busy_iter(&shost->tag_set, __scsi_host_busy_iter_fn,  in scsi_host_busy_iter()