92 	struct hvc_struct *hp;  in hvc_get_by_index()  local
97 	list_for_each_entry(hp, &hvc_structs, next) {  in hvc_get_by_index()
98 		spin_lock_irqsave(&hp->lock, flags);  in hvc_get_by_index()
99 		if (hp->index == index) {  in hvc_get_by_index()
100 			tty_port_get(&hp->port);  in hvc_get_by_index()
101 			spin_unlock_irqrestore(&hp->lock, flags);  in hvc_get_by_index()
103 			return hp;  in hvc_get_by_index()
105 		spin_unlock_irqrestore(&hp->lock, flags);  in hvc_get_by_index()
107 	hp = NULL;  in hvc_get_by_index()
110 	return hp;  in hvc_get_by_index()
131 static int hvc_flush(struct hvc_struct *hp)  in hvc_flush()  argument
133 	return __hvc_flush(hp->ops, hp->vtermno, true);  in hvc_flush()
251 	struct hvc_struct *hp = container_of(port, struct hvc_struct, port);  in hvc_port_destruct()  local
256 	spin_lock_irqsave(&hp->lock, flags);  in hvc_port_destruct()
257 	list_del(&(hp->next));  in hvc_port_destruct()
258 	spin_unlock_irqrestore(&hp->lock, flags);  in hvc_port_destruct()
262 	kfree(hp);  in hvc_port_destruct()
287 	struct hvc_struct *hp;  in hvc_instantiate()  local
296 	hp = hvc_get_by_index(index);  in hvc_instantiate()
297 	if (hp) {  in hvc_instantiate()
298 		tty_port_put(&hp->port);  in hvc_instantiate()
331 	struct hvc_struct *hp;  in hvc_install()  local
335 	hp = hvc_get_by_index(tty->index);  in hvc_install()
336 	if (!hp)  in hvc_install()
339 	tty->driver_data = hp;  in hvc_install()
341 	rc = tty_port_install(&hp->port, driver, tty);  in hvc_install()
343 		tty_port_put(&hp->port);  in hvc_install()
353 	struct hvc_struct *hp = tty->driver_data;  in hvc_open()  local
357 	spin_lock_irqsave(&hp->port.lock, flags);  in hvc_open()
359 	if (hp->port.count++ > 0) {  in hvc_open()
360 		spin_unlock_irqrestore(&hp->port.lock, flags);  in hvc_open()
364 	spin_unlock_irqrestore(&hp->port.lock, flags);  in hvc_open()
366 	tty_port_tty_set(&hp->port, tty);  in hvc_open()
368 	if (hp->ops->notifier_add)  in hvc_open()
369 		rc = hp->ops->notifier_add(hp, hp->data);  in hvc_open()
378 		tty_port_tty_set(&hp->port, NULL);  in hvc_open()
380 		tty_port_put(&hp->port);  in hvc_open()
385 			if (hp->ops->dtr_rts)  in hvc_open()
386 				hp->ops->dtr_rts(hp, 1);  in hvc_open()
396 	struct hvc_struct *hp;  in hvc_close()  local
410 	hp = tty->driver_data;  in hvc_close()
412 	spin_lock_irqsave(&hp->port.lock, flags);  in hvc_close()
414 	if (--hp->port.count == 0) {  in hvc_close()
415 		spin_unlock_irqrestore(&hp->port.lock, flags);  in hvc_close()
417 		tty_port_tty_set(&hp->port, NULL);  in hvc_close()
420 			if (hp->ops->dtr_rts)  in hvc_close()
421 				hp->ops->dtr_rts(hp, 0);  in hvc_close()
423 		if (hp->ops->notifier_del)  in hvc_close()
424 			hp->ops->notifier_del(hp, hp->data);  in hvc_close()
427 		cancel_work_sync(&hp->tty_resize);  in hvc_close()
436 		if (hp->port.count < 0)  in hvc_close()
438 				hp->vtermno, hp->port.count);  in hvc_close()
439 		spin_unlock_irqrestore(&hp->port.lock, flags);  in hvc_close()
445 	struct hvc_struct *hp = tty->driver_data;  in hvc_cleanup()  local
447 	tty_port_put(&hp->port);  in hvc_cleanup()
452 	struct hvc_struct *hp = tty->driver_data;  in hvc_hangup()  local
455 	if (!hp)  in hvc_hangup()
459 	cancel_work_sync(&hp->tty_resize);  in hvc_hangup()
461 	spin_lock_irqsave(&hp->port.lock, flags);  in hvc_hangup()
468 	if (hp->port.count <= 0) {  in hvc_hangup()
469 		spin_unlock_irqrestore(&hp->port.lock, flags);  in hvc_hangup()
473 	hp->port.count = 0;  in hvc_hangup()
474 	spin_unlock_irqrestore(&hp->port.lock, flags);  in hvc_hangup()
475 	tty_port_tty_set(&hp->port, NULL);  in hvc_hangup()
477 	hp->n_outbuf = 0;  in hvc_hangup()
479 	if (hp->ops->notifier_hangup)  in hvc_hangup()
480 		hp->ops->notifier_hangup(hp, hp->data);  in hvc_hangup()
487 static int hvc_push(struct hvc_struct *hp)  in hvc_push()  argument
491 	n = hp->ops->put_chars(hp->vtermno, hp->outbuf, hp->n_outbuf);  in hvc_push()
494 			hp->do_wakeup = 1;  in hvc_push()
499 		hp->n_outbuf = 0;  in hvc_push()
501 		hp->n_outbuf -= n;  in hvc_push()
502 	if (hp->n_outbuf > 0)  in hvc_push()
503 		memmove(hp->outbuf, hp->outbuf + n, hp->n_outbuf);  in hvc_push()
505 		hp->do_wakeup = 1;  in hvc_push()
512 	struct hvc_struct *hp = tty->driver_data;  in hvc_write()  local
517 	if (!hp)  in hvc_write()
521 	if (hp->port.count <= 0)  in hvc_write()
527 		spin_lock_irqsave(&hp->lock, flags);  in hvc_write()
529 		rsize = hp->outbuf_size - hp->n_outbuf;  in hvc_write()
534 			memcpy(hp->outbuf + hp->n_outbuf, buf, rsize);  in hvc_write()
537 			hp->n_outbuf += rsize;  in hvc_write()
541 		if (hp->n_outbuf > 0)  in hvc_write()
542 			ret = hvc_push(hp);  in hvc_write()
544 		spin_unlock_irqrestore(&hp->lock, flags);  in hvc_write()
550 			if (hp->n_outbuf > 0)  in hvc_write()
551 				hvc_flush(hp);  in hvc_write()
559 	if (hp->n_outbuf)  in hvc_write()
576 	struct hvc_struct *hp;  in hvc_set_winsz()  local
581 	hp = container_of(work, struct hvc_struct, tty_resize);  in hvc_set_winsz()
583 	tty = tty_port_tty_get(&hp->port);  in hvc_set_winsz()
587 	spin_lock_irqsave(&hp->lock, hvc_flags);  in hvc_set_winsz()
588 	ws = hp->ws;  in hvc_set_winsz()
589 	spin_unlock_irqrestore(&hp->lock, hvc_flags);  in hvc_set_winsz()
602 	struct hvc_struct *hp = tty->driver_data;  in hvc_write_room()  local
604 	if (!hp)  in hvc_write_room()
607 	return hp->outbuf_size - hp->n_outbuf;  in hvc_write_room()
612 	struct hvc_struct *hp = tty->driver_data;  in hvc_chars_in_buffer()  local
614 	if (!hp)  in hvc_chars_in_buffer()
616 	return hp->n_outbuf;  in hvc_chars_in_buffer()
643 static int __hvc_poll(struct hvc_struct *hp, bool may_sleep)  in __hvc_poll()  argument
652 	spin_lock_irqsave(&hp->lock, flags);  in __hvc_poll()
655 	if (hp->n_outbuf > 0)  in __hvc_poll()
656 		written_total = hvc_push(hp);  in __hvc_poll()
659 	if (hp->n_outbuf > 0) {  in __hvc_poll()
666 		spin_unlock_irqrestore(&hp->lock, flags);  in __hvc_poll()
668 		spin_lock_irqsave(&hp->lock, flags);  in __hvc_poll()
672 	tty = tty_port_tty_get(&hp->port);  in __hvc_poll()
683 	if (!hp->irq_requested)  in __hvc_poll()
688 	count = tty_buffer_request_room(&hp->port, N_INBUF);  in __hvc_poll()
696 	n = hp->ops->get_chars(hp->vtermno, buf, count);  in __hvc_poll()
700 			spin_unlock_irqrestore(&hp->lock, flags);  in __hvc_poll()
702 			spin_lock_irqsave(&hp->lock, flags);  in __hvc_poll()
716 		if (hp->index == hvc_console.index) {  in __hvc_poll()
732 		tty_insert_flip_char(&hp->port, buf[i], 0);  in __hvc_poll()
738 		spin_unlock_irqrestore(&hp->lock, flags);  in __hvc_poll()
740 		spin_lock_irqsave(&hp->lock, flags);  in __hvc_poll()
754 	if (hp->do_wakeup) {  in __hvc_poll()
755 		hp->do_wakeup = 0;  in __hvc_poll()
759 	spin_unlock_irqrestore(&hp->lock, flags);  in __hvc_poll()
766 		tty_flip_buffer_push(&hp->port);  in __hvc_poll()
773 int hvc_poll(struct hvc_struct *hp)  in hvc_poll()  argument
775 	return __hvc_poll(hp, false);  in hvc_poll()
789 void __hvc_resize(struct hvc_struct *hp, struct winsize ws)  in __hvc_resize()  argument
791 	hp->ws = ws;  in __hvc_resize()
792 	schedule_work(&hp->tty_resize);  in __hvc_resize()
804 	struct hvc_struct *hp;  in khvcd()  local
814 			list_for_each_entry(hp, &hvc_structs, next) {  in khvcd()
815 				poll_mask |= __hvc_poll(hp, true);  in khvcd()
849 	struct hvc_struct *hp = tty->driver_data;  in hvc_tiocmget()  local
851 	if (!hp || !hp->ops->tiocmget)  in hvc_tiocmget()
853 	return hp->ops->tiocmget(hp);  in hvc_tiocmget()
859 	struct hvc_struct *hp = tty->driver_data;  in hvc_tiocmset()  local
861 	if (!hp || !hp->ops->tiocmset)  in hvc_tiocmset()
863 	return hp->ops->tiocmset(hp, set, clear);  in hvc_tiocmset()
875 	struct hvc_struct *hp = tty->driver_data;  in hvc_poll_get_char()  local
879 	n = hp->ops->get_chars(hp->vtermno, &ch, 1);  in hvc_poll_get_char()
890 	struct hvc_struct *hp = tty->driver_data;  in hvc_poll_put_char()  local
894 		n = hp->ops->put_chars(hp->vtermno, &ch, 1);  in hvc_poll_put_char()
926 	struct hvc_struct *hp;  in hvc_alloc()  local
936 	hp = kzalloc(ALIGN(sizeof(*hp), sizeof(long)) + outbuf_size,  in hvc_alloc()
938 	if (!hp)  in hvc_alloc()
941 	hp->vtermno = vtermno;  in hvc_alloc()
942 	hp->data = data;  in hvc_alloc()
943 	hp->ops = ops;  in hvc_alloc()
944 	hp->outbuf_size = outbuf_size;  in hvc_alloc()
945 	hp->outbuf = &((char *)hp)[ALIGN(sizeof(*hp), sizeof(long))];  in hvc_alloc()
947 	tty_port_init(&hp->port);  in hvc_alloc()
948 	hp->port.ops = &hvc_port_ops;  in hvc_alloc()
950 	INIT_WORK(&hp->tty_resize, hvc_set_winsz);  in hvc_alloc()
951 	spin_lock_init(&hp->lock);  in hvc_alloc()
959 		if (vtermnos[i] == hp->vtermno &&  in hvc_alloc()
960 		    cons_ops[i] == hp->ops)  in hvc_alloc()
967 	hp->index = i;  in hvc_alloc()
971 	list_add_tail(&(hp->next), &hvc_structs);  in hvc_alloc()
977 	return hp;  in hvc_alloc()
981 int hvc_remove(struct hvc_struct *hp)  in hvc_remove()  argument
986 	tty = tty_port_tty_get(&hp->port);  in hvc_remove()
989 	spin_lock_irqsave(&hp->lock, flags);  in hvc_remove()
990 	if (hp->index < MAX_NR_HVC_CONSOLES) {  in hvc_remove()
991 		vtermnos[hp->index] = -1;  in hvc_remove()
992 		cons_ops[hp->index] = NULL;  in hvc_remove()
997 	spin_unlock_irqrestore(&hp->lock, flags);  in hvc_remove()
1006 	tty_port_put(&hp->port);  in hvc_remove()