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()
230 	error = scsi_setup_command_freelist(shost);  in scsi_add_host_with_dma()
235 	if (!shost->shost_gendev.parent)  in scsi_add_host_with_dma()
236 		shost->shost_gendev.parent = dev ? dev : &platform_bus;  in scsi_add_host_with_dma()
238 		dma_dev = shost->shost_gendev.parent;  in scsi_add_host_with_dma()
240 	shost->dma_dev = dma_dev;  in scsi_add_host_with_dma()
242 	error = device_add(&shost->shost_gendev);  in scsi_add_host_with_dma()
246 	pm_runtime_set_active(&shost->shost_gendev);  in scsi_add_host_with_dma()
247 	pm_runtime_enable(&shost->shost_gendev);  in scsi_add_host_with_dma()
248 	device_enable_async_suspend(&shost->shost_gendev);  in scsi_add_host_with_dma()
250 	scsi_host_set_state(shost, SHOST_RUNNING);  in scsi_add_host_with_dma()
251 	get_device(shost->shost_gendev.parent);  in scsi_add_host_with_dma()
253 	device_enable_async_suspend(&shost->shost_dev);  in scsi_add_host_with_dma()
255 	error = device_add(&shost->shost_dev);  in scsi_add_host_with_dma()
259 	get_device(&shost->shost_gendev);  in scsi_add_host_with_dma()
261 	if (shost->transportt->host_size) {  in scsi_add_host_with_dma()
262 		shost->shost_data = kzalloc(shost->transportt->host_size,  in scsi_add_host_with_dma()
264 		if (shost->shost_data == NULL) {  in scsi_add_host_with_dma()
270 	if (shost->transportt->create_work_queue) {  in scsi_add_host_with_dma()
271 		snprintf(shost->work_q_name, sizeof(shost->work_q_name),  in scsi_add_host_with_dma()
272 			 "scsi_wq_%d", shost->host_no);  in scsi_add_host_with_dma()
273 		shost->work_q = create_singlethread_workqueue(  in scsi_add_host_with_dma()
274 					shost->work_q_name);  in scsi_add_host_with_dma()
275 		if (!shost->work_q) {  in scsi_add_host_with_dma()
281 	error = scsi_sysfs_add_host(shost);  in scsi_add_host_with_dma()
285 	scsi_proc_host_add(shost);  in scsi_add_host_with_dma()
289 	if (shost->work_q)  in scsi_add_host_with_dma()
290 		destroy_workqueue(shost->work_q);  in scsi_add_host_with_dma()
292 	kfree(shost->shost_data);  in scsi_add_host_with_dma()
294 	device_del(&shost->shost_dev);  in scsi_add_host_with_dma()
296 	device_del(&shost->shost_gendev);  in scsi_add_host_with_dma()
298 	scsi_destroy_command_freelist(shost);  in scsi_add_host_with_dma()
300 	if (shost_use_blk_mq(shost))  in scsi_add_host_with_dma()
301 		scsi_mq_destroy_tags(shost);  in scsi_add_host_with_dma()
309 	struct Scsi_Host *shost = dev_to_shost(dev);  in scsi_host_dev_release()  local
314 	scsi_proc_hostdir_rm(shost->hostt);  in scsi_host_dev_release()
316 	if (shost->tmf_work_q)  in scsi_host_dev_release()
317 		destroy_workqueue(shost->tmf_work_q);  in scsi_host_dev_release()
318 	if (shost->ehandler)  in scsi_host_dev_release()
319 		kthread_stop(shost->ehandler);  in scsi_host_dev_release()
320 	if (shost->work_q)  in scsi_host_dev_release()
321 		destroy_workqueue(shost->work_q);  in scsi_host_dev_release()
322 	q = shost->uspace_req_q;  in scsi_host_dev_release()
329 	scsi_destroy_command_freelist(shost);  in scsi_host_dev_release()
330 	if (shost_use_blk_mq(shost)) {  in scsi_host_dev_release()
331 		if (shost->tag_set.tags)  in scsi_host_dev_release()
332 			scsi_mq_destroy_tags(shost);  in scsi_host_dev_release()
334 		if (shost->bqt)  in scsi_host_dev_release()
335 			blk_free_tags(shost->bqt);  in scsi_host_dev_release()
338 	kfree(shost->shost_data);  in scsi_host_dev_release()
342 	kfree(shost);  in scsi_host_dev_release()
371 	struct Scsi_Host *shost;  in scsi_host_alloc()  local
377 	shost = kzalloc(sizeof(struct Scsi_Host) + privsize, gfp_mask);  in scsi_host_alloc()
378 	if (!shost)  in scsi_host_alloc()
381 	shost->host_lock = &shost->default_lock;  in scsi_host_alloc()
382 	spin_lock_init(shost->host_lock);  in scsi_host_alloc()
383 	shost->shost_state = SHOST_CREATED;  in scsi_host_alloc()
384 	INIT_LIST_HEAD(&shost->__devices);  in scsi_host_alloc()
385 	INIT_LIST_HEAD(&shost->__targets);  in scsi_host_alloc()
386 	INIT_LIST_HEAD(&shost->eh_cmd_q);  in scsi_host_alloc()
387 	INIT_LIST_HEAD(&shost->starved_list);  in scsi_host_alloc()
388 	init_waitqueue_head(&shost->host_wait);  in scsi_host_alloc()
389 	mutex_init(&shost->scan_mutex);  in scsi_host_alloc()
395 	shost->host_no = atomic_inc_return(&scsi_host_next_hn) - 1;  in scsi_host_alloc()
396 	shost->dma_channel = 0xff;  in scsi_host_alloc()
399 	shost->max_channel = 0;  in scsi_host_alloc()
400 	shost->max_id = 8;  in scsi_host_alloc()
401 	shost->max_lun = 8;  in scsi_host_alloc()
404 	shost->transportt = &blank_transport_template;  in scsi_host_alloc()
412 	shost->max_cmd_len = 12;  in scsi_host_alloc()
413 	shost->hostt = sht;  in scsi_host_alloc()
414 	shost->this_id = sht->this_id;  in scsi_host_alloc()
415 	shost->can_queue = sht->can_queue;  in scsi_host_alloc()
416 	shost->sg_tablesize = sht->sg_tablesize;  in scsi_host_alloc()
417 	shost->sg_prot_tablesize = sht->sg_prot_tablesize;  in scsi_host_alloc()
418 	shost->cmd_per_lun = sht->cmd_per_lun;  in scsi_host_alloc()
419 	shost->unchecked_isa_dma = sht->unchecked_isa_dma;  in scsi_host_alloc()
420 	shost->use_clustering = sht->use_clustering;  in scsi_host_alloc()
421 	shost->no_write_same = sht->no_write_same;  in scsi_host_alloc()
424 		shost->eh_deadline = -1;  in scsi_host_alloc()
426 		shost_printk(KERN_WARNING, shost,  in scsi_host_alloc()
429 		shost->eh_deadline = INT_MAX;  in scsi_host_alloc()
431 		shost->eh_deadline = shost_eh_deadline * HZ;  in scsi_host_alloc()
435 		shost->active_mode = MODE_INITIATOR;  in scsi_host_alloc()
437 		shost->active_mode = sht->supported_mode;  in scsi_host_alloc()
440 		shost->max_host_blocked = sht->max_host_blocked;  in scsi_host_alloc()
442 		shost->max_host_blocked = SCSI_DEFAULT_HOST_BLOCKED;  in scsi_host_alloc()
449 		shost->max_sectors = sht->max_sectors;  in scsi_host_alloc()
451 		shost->max_sectors = SCSI_DEFAULT_MAX_SECTORS;  in scsi_host_alloc()
457 		shost->dma_boundary = sht->dma_boundary;  in scsi_host_alloc()
459 		shost->dma_boundary = 0xffffffff;  in scsi_host_alloc()
461 	shost->use_blk_mq = scsi_use_blk_mq && !shost->hostt->disable_blk_mq;  in scsi_host_alloc()
463 	device_initialize(&shost->shost_gendev);  in scsi_host_alloc()
464 	dev_set_name(&shost->shost_gendev, "host%d", shost->host_no);  in scsi_host_alloc()
465 	shost->shost_gendev.bus = &scsi_bus_type;  in scsi_host_alloc()
466 	shost->shost_gendev.type = &scsi_host_type;  in scsi_host_alloc()
468 	device_initialize(&shost->shost_dev);  in scsi_host_alloc()
469 	shost->shost_dev.parent = &shost->shost_gendev;  in scsi_host_alloc()
470 	shost->shost_dev.class = &shost_class;  in scsi_host_alloc()
471 	dev_set_name(&shost->shost_dev, "host%d", shost->host_no);  in scsi_host_alloc()
472 	shost->shost_dev.groups = scsi_sysfs_shost_attr_groups;  in scsi_host_alloc()
474 	shost->ehandler = kthread_run(scsi_error_handler, shost,  in scsi_host_alloc()
475 			"scsi_eh_%d", shost->host_no);  in scsi_host_alloc()
476 	if (IS_ERR(shost->ehandler)) {  in scsi_host_alloc()
477 		shost_printk(KERN_WARNING, shost,  in scsi_host_alloc()
479 			PTR_ERR(shost->ehandler));  in scsi_host_alloc()
483 	shost->tmf_work_q = alloc_workqueue("scsi_tmf_%d",  in scsi_host_alloc()
485 					   1, shost->host_no);  in scsi_host_alloc()
486 	if (!shost->tmf_work_q) {  in scsi_host_alloc()
487 		shost_printk(KERN_WARNING, shost,  in scsi_host_alloc()
491 	scsi_proc_hostdir_add(shost->hostt);  in scsi_host_alloc()
492 	return shost;  in scsi_host_alloc()
495 	kthread_stop(shost->ehandler);  in scsi_host_alloc()
497 	kfree(shost);  in scsi_host_alloc()
504 	struct Scsi_Host *shost = scsi_host_alloc(sht, privsize);  in scsi_register()  local
512 	if (shost)  in scsi_register()
513 		list_add_tail(&shost->sht_legacy_list, &sht->legacy_hosts);  in scsi_register()
514 	return shost;  in scsi_register()
518 void scsi_unregister(struct Scsi_Host *shost)  in scsi_unregister()  argument
520 	list_del(&shost->sht_legacy_list);  in scsi_unregister()
521 	scsi_host_put(shost);  in scsi_unregister()
548 	struct Scsi_Host *shost = NULL;  in scsi_host_lookup()  local
553 		shost = scsi_host_get(class_to_shost(cdev));  in scsi_host_lookup()
556 	return shost;  in scsi_host_lookup()
564 struct Scsi_Host *scsi_host_get(struct Scsi_Host *shost)  in scsi_host_get()  argument
566 	if ((shost->shost_state == SHOST_DEL) ||  in scsi_host_get()
567 		!get_device(&shost->shost_gendev))  in scsi_host_get()
569 	return shost;  in scsi_host_get()
577 void scsi_host_put(struct Scsi_Host *shost)  in scsi_host_put()  argument
579 	put_device(&shost->shost_gendev);  in scsi_host_put()
609 int scsi_queue_work(struct Scsi_Host *shost, struct work_struct *work)  in scsi_queue_work()  argument
611 	if (unlikely(!shost->work_q)) {  in scsi_queue_work()
612 		shost_printk(KERN_ERR, shost,  in scsi_queue_work()
614 			"when no workqueue created.\n", shost->hostt->name);  in scsi_queue_work()
620 	return queue_work(shost->work_q, work);  in scsi_queue_work()
628 void scsi_flush_work(struct Scsi_Host *shost)  in scsi_flush_work()  argument
630 	if (!shost->work_q) {  in scsi_flush_work()
631 		shost_printk(KERN_ERR, shost,  in scsi_flush_work()
633 			"when no workqueue created.\n", shost->hostt->name);  in scsi_flush_work()
638 	flush_workqueue(shost->work_q);  in scsi_flush_work()