72 int scsi_host_set_state(struct Scsi_Host *shost, enum scsi_host_state state)  in scsi_host_set_state()  argument
74 	enum scsi_host_state oldstate = shost->shost_state;  in scsi_host_set_state()
145 	shost->shost_state = state;  in scsi_host_set_state()
150 				shost_printk(KERN_ERR, shost,  in scsi_host_set_state()
162 void scsi_remove_host(struct Scsi_Host *shost)  in scsi_remove_host()  argument
166 	mutex_lock(&shost->scan_mutex);  in scsi_remove_host()
167 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_remove_host()
168 	if (scsi_host_set_state(shost, SHOST_CANCEL))  in scsi_remove_host()
169 		if (scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY)) {  in scsi_remove_host()
170 			spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_remove_host()
171 			mutex_unlock(&shost->scan_mutex);  in scsi_remove_host()
174 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_remove_host()
176 	scsi_autopm_get_host(shost);  in scsi_remove_host()
177 	flush_workqueue(shost->tmf_work_q);  in scsi_remove_host()
178 	scsi_forget_host(shost);  in scsi_remove_host()
179 	mutex_unlock(&shost->scan_mutex);  in scsi_remove_host()
180 	scsi_proc_host_rm(shost);  in scsi_remove_host()
182 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_remove_host()
183 	if (scsi_host_set_state(shost, SHOST_DEL))  in scsi_remove_host()
184 		BUG_ON(scsi_host_set_state(shost, SHOST_DEL_RECOVERY));  in scsi_remove_host()
185 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_remove_host()
187 	transport_unregister_device(&shost->shost_gendev);  in scsi_remove_host()
188 	device_unregister(&shost->shost_dev);  in scsi_remove_host()
189 	device_del(&shost->shost_gendev);  in scsi_remove_host()
206 int scsi_add_host_with_dma(struct Scsi_Host *shost, struct device *dev,  in scsi_add_host_with_dma()  argument
209 	struct scsi_host_template *sht = shost->hostt;  in scsi_add_host_with_dma()
212 	shost_printk(KERN_INFO, shost, "%s\n",  in scsi_add_host_with_dma()
213 			sht->info ? sht->info(shost) : sht->name);  in scsi_add_host_with_dma()
215 	if (!shost->can_queue) {  in scsi_add_host_with_dma()
216 		shost_printk(KERN_ERR, shost,  in scsi_add_host_with_dma()
221 	error = scsi_init_sense_cache(shost);  in scsi_add_host_with_dma()
225 	if (shost_use_blk_mq(shost)) {  in scsi_add_host_with_dma()
226 		error = scsi_mq_setup_tags(shost);  in scsi_add_host_with_dma()
230 		shost->bqt = blk_init_tags(shost->can_queue,  in scsi_add_host_with_dma()
231 				shost->hostt->tag_alloc_policy);  in scsi_add_host_with_dma()
232 		if (!shost->bqt) {  in scsi_add_host_with_dma()
238 	if (!shost->shost_gendev.parent)  in scsi_add_host_with_dma()
239 		shost->shost_gendev.parent = dev ? dev : &platform_bus;  in scsi_add_host_with_dma()
241 		dma_dev = shost->shost_gendev.parent;  in scsi_add_host_with_dma()
243 	shost->dma_dev = dma_dev;  in scsi_add_host_with_dma()
250 	pm_runtime_get_noresume(&shost->shost_gendev);  in scsi_add_host_with_dma()
251 	pm_runtime_set_active(&shost->shost_gendev);  in scsi_add_host_with_dma()
252 	pm_runtime_enable(&shost->shost_gendev);  in scsi_add_host_with_dma()
253 	device_enable_async_suspend(&shost->shost_gendev);  in scsi_add_host_with_dma()
255 	error = device_add(&shost->shost_gendev);  in scsi_add_host_with_dma()
259 	scsi_host_set_state(shost, SHOST_RUNNING);  in scsi_add_host_with_dma()
260 	get_device(shost->shost_gendev.parent);  in scsi_add_host_with_dma()
262 	device_enable_async_suspend(&shost->shost_dev);  in scsi_add_host_with_dma()
264 	error = device_add(&shost->shost_dev);  in scsi_add_host_with_dma()
268 	get_device(&shost->shost_gendev);  in scsi_add_host_with_dma()
270 	if (shost->transportt->host_size) {  in scsi_add_host_with_dma()
271 		shost->shost_data = kzalloc(shost->transportt->host_size,  in scsi_add_host_with_dma()
273 		if (shost->shost_data == NULL) {  in scsi_add_host_with_dma()
279 	if (shost->transportt->create_work_queue) {  in scsi_add_host_with_dma()
280 		snprintf(shost->work_q_name, sizeof(shost->work_q_name),  in scsi_add_host_with_dma()
281 			 "scsi_wq_%d", shost->host_no);  in scsi_add_host_with_dma()
282 		shost->work_q = create_singlethread_workqueue(  in scsi_add_host_with_dma()
283 					shost->work_q_name);  in scsi_add_host_with_dma()
284 		if (!shost->work_q) {  in scsi_add_host_with_dma()
290 	error = scsi_sysfs_add_host(shost);  in scsi_add_host_with_dma()
294 	scsi_proc_host_add(shost);  in scsi_add_host_with_dma()
295 	scsi_autopm_put_host(shost);  in scsi_add_host_with_dma()
299 	if (shost->work_q)  in scsi_add_host_with_dma()
300 		destroy_workqueue(shost->work_q);  in scsi_add_host_with_dma()
302 	kfree(shost->shost_data);  in scsi_add_host_with_dma()
304 	device_del(&shost->shost_dev);  in scsi_add_host_with_dma()
306 	device_del(&shost->shost_gendev);  in scsi_add_host_with_dma()
308 	device_disable_async_suspend(&shost->shost_gendev);  in scsi_add_host_with_dma()
309 	pm_runtime_disable(&shost->shost_gendev);  in scsi_add_host_with_dma()
310 	pm_runtime_set_suspended(&shost->shost_gendev);  in scsi_add_host_with_dma()
311 	pm_runtime_put_noidle(&shost->shost_gendev);  in scsi_add_host_with_dma()
312 	if (shost_use_blk_mq(shost))  in scsi_add_host_with_dma()
313 		scsi_mq_destroy_tags(shost);  in scsi_add_host_with_dma()
321 	struct Scsi_Host *shost = dev_to_shost(dev);  in scsi_host_dev_release()  local
324 	scsi_proc_hostdir_rm(shost->hostt);  in scsi_host_dev_release()
329 	if (shost->tmf_work_q)  in scsi_host_dev_release()
330 		destroy_workqueue(shost->tmf_work_q);  in scsi_host_dev_release()
331 	if (shost->ehandler)  in scsi_host_dev_release()
332 		kthread_stop(shost->ehandler);  in scsi_host_dev_release()
333 	if (shost->work_q)  in scsi_host_dev_release()
334 		destroy_workqueue(shost->work_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 	if (shost_use_blk_mq(shost)) {  in scsi_host_dev_release()
348 		if (shost->tag_set.tags)  in scsi_host_dev_release()
349 			scsi_mq_destroy_tags(shost);  in scsi_host_dev_release()
351 		if (shost->bqt)  in scsi_host_dev_release()
352 			blk_free_tags(shost->bqt);  in scsi_host_dev_release()
355 	kfree(shost->shost_data);  in scsi_host_dev_release()
357 	ida_simple_remove(&host_index_ida, shost->host_no);  in scsi_host_dev_release()
361 	kfree(shost);  in scsi_host_dev_release()
384 	struct Scsi_Host *shost;  in scsi_host_alloc()  local
391 	shost = kzalloc(sizeof(struct Scsi_Host) + privsize, gfp_mask);  in scsi_host_alloc()
392 	if (!shost)  in scsi_host_alloc()
395 	shost->host_lock = &shost->default_lock;  in scsi_host_alloc()
396 	spin_lock_init(shost->host_lock);  in scsi_host_alloc()
397 	shost->shost_state = SHOST_CREATED;  in scsi_host_alloc()
398 	INIT_LIST_HEAD(&shost->__devices);  in scsi_host_alloc()
399 	INIT_LIST_HEAD(&shost->__targets);  in scsi_host_alloc()
400 	INIT_LIST_HEAD(&shost->eh_cmd_q);  in scsi_host_alloc()
401 	INIT_LIST_HEAD(&shost->starved_list);  in scsi_host_alloc()
402 	init_waitqueue_head(&shost->host_wait);  in scsi_host_alloc()
403 	mutex_init(&shost->scan_mutex);  in scsi_host_alloc()
408 	shost->host_no = index;  in scsi_host_alloc()
410 	shost->dma_channel = 0xff;  in scsi_host_alloc()
413 	shost->max_channel = 0;  in scsi_host_alloc()
414 	shost->max_id = 8;  in scsi_host_alloc()
415 	shost->max_lun = 8;  in scsi_host_alloc()
418 	shost->transportt = &blank_transport_template;  in scsi_host_alloc()
426 	shost->max_cmd_len = 12;  in scsi_host_alloc()
427 	shost->hostt = sht;  in scsi_host_alloc()
428 	shost->this_id = sht->this_id;  in scsi_host_alloc()
429 	shost->can_queue = sht->can_queue;  in scsi_host_alloc()
430 	shost->sg_tablesize = sht->sg_tablesize;  in scsi_host_alloc()
431 	shost->sg_prot_tablesize = sht->sg_prot_tablesize;  in scsi_host_alloc()
432 	shost->cmd_per_lun = sht->cmd_per_lun;  in scsi_host_alloc()
433 	shost->unchecked_isa_dma = sht->unchecked_isa_dma;  in scsi_host_alloc()
434 	shost->use_clustering = sht->use_clustering;  in scsi_host_alloc()
435 	shost->no_write_same = sht->no_write_same;  in scsi_host_alloc()
438 		shost->eh_deadline = -1;  in scsi_host_alloc()
440 		shost_printk(KERN_WARNING, shost,  in scsi_host_alloc()
443 		shost->eh_deadline = INT_MAX;  in scsi_host_alloc()
445 		shost->eh_deadline = shost_eh_deadline * HZ;  in scsi_host_alloc()
449 		shost->active_mode = MODE_INITIATOR;  in scsi_host_alloc()
451 		shost->active_mode = sht->supported_mode;  in scsi_host_alloc()
454 		shost->max_host_blocked = sht->max_host_blocked;  in scsi_host_alloc()
456 		shost->max_host_blocked = SCSI_DEFAULT_HOST_BLOCKED;  in scsi_host_alloc()
463 		shost->max_sectors = sht->max_sectors;  in scsi_host_alloc()
465 		shost->max_sectors = SCSI_DEFAULT_MAX_SECTORS;  in scsi_host_alloc()
471 		shost->dma_boundary = sht->dma_boundary;  in scsi_host_alloc()
473 		shost->dma_boundary = 0xffffffff;  in scsi_host_alloc()
475 	shost->use_blk_mq = scsi_use_blk_mq || shost->hostt->force_blk_mq;  in scsi_host_alloc()
477 	device_initialize(&shost->shost_gendev);  in scsi_host_alloc()
478 	dev_set_name(&shost->shost_gendev, "host%d", shost->host_no);  in scsi_host_alloc()
479 	shost->shost_gendev.bus = &scsi_bus_type;  in scsi_host_alloc()
480 	shost->shost_gendev.type = &scsi_host_type;  in scsi_host_alloc()
482 	device_initialize(&shost->shost_dev);  in scsi_host_alloc()
483 	shost->shost_dev.parent = &shost->shost_gendev;  in scsi_host_alloc()
484 	shost->shost_dev.class = &shost_class;  in scsi_host_alloc()
485 	dev_set_name(&shost->shost_dev, "host%d", shost->host_no);  in scsi_host_alloc()
486 	shost->shost_dev.groups = scsi_sysfs_shost_attr_groups;  in scsi_host_alloc()
488 	shost->ehandler = kthread_run(scsi_error_handler, shost,  in scsi_host_alloc()
489 			"scsi_eh_%d", shost->host_no);  in scsi_host_alloc()
490 	if (IS_ERR(shost->ehandler)) {  in scsi_host_alloc()
491 		shost_printk(KERN_WARNING, shost,  in scsi_host_alloc()
493 			PTR_ERR(shost->ehandler));  in scsi_host_alloc()
497 	shost->tmf_work_q = alloc_workqueue("scsi_tmf_%d",  in scsi_host_alloc()
499 					   1, shost->host_no);  in scsi_host_alloc()
500 	if (!shost->tmf_work_q) {  in scsi_host_alloc()
501 		shost_printk(KERN_WARNING, shost,  in scsi_host_alloc()
505 	scsi_proc_hostdir_add(shost->hostt);  in scsi_host_alloc()
506 	return shost;  in scsi_host_alloc()
509 	kthread_stop(shost->ehandler);  in scsi_host_alloc()
511 	ida_simple_remove(&host_index_ida, shost->host_no);  in scsi_host_alloc()
513 	kfree(shost);  in scsi_host_alloc()
541 	struct Scsi_Host *shost = NULL;  in scsi_host_lookup()  local
546 		shost = scsi_host_get(class_to_shost(cdev));  in scsi_host_lookup()
549 	return shost;  in scsi_host_lookup()
557 struct Scsi_Host *scsi_host_get(struct Scsi_Host *shost)  in scsi_host_get()  argument
559 	if ((shost->shost_state == SHOST_DEL) ||  in scsi_host_get()
560 		!get_device(&shost->shost_gendev))  in scsi_host_get()
562 	return shost;  in scsi_host_get()
570 int scsi_host_busy(struct Scsi_Host *shost)  in scsi_host_busy()  argument
572 	return atomic_read(&shost->host_busy);  in scsi_host_busy()
580 void scsi_host_put(struct Scsi_Host *shost)  in scsi_host_put()  argument
582 	put_device(&shost->shost_gendev);  in scsi_host_put()
613 int scsi_queue_work(struct Scsi_Host *shost, struct work_struct *work)  in scsi_queue_work()  argument
615 	if (unlikely(!shost->work_q)) {  in scsi_queue_work()
616 		shost_printk(KERN_ERR, shost,  in scsi_queue_work()
618 			"when no workqueue created.\n", shost->hostt->name);  in scsi_queue_work()
624 	return queue_work(shost->work_q, work);  in scsi_queue_work()
632 void scsi_flush_work(struct Scsi_Host *shost)  in scsi_flush_work()  argument
634 	if (!shost->work_q) {  in scsi_flush_work()
635 		shost_printk(KERN_ERR, shost,  in scsi_flush_work()
637 			"when no workqueue created.\n", shost->hostt->name);  in scsi_flush_work()
642 	flush_workqueue(shost->work_q);  in scsi_flush_work()