296 static int hvcs_get_pi(struct hvcs_struct *hvcsd);
299 static void hvcs_partner_free(struct hvcs_struct *hvcsd);
317 	struct hvcs_struct *hvcsd = from_vio_dev(viod);  in hvcs_partner_vtys_show()  local
321 	spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_partner_vtys_show()
322 	retval = sprintf(buf, "%X\n", hvcsd->p_unit_address);  in hvcs_partner_vtys_show()
323 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_partner_vtys_show()
331 	struct hvcs_struct *hvcsd = from_vio_dev(viod);  in hvcs_partner_clcs_show()  local
335 	spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_partner_clcs_show()
336 	retval = sprintf(buf, "%s\n", &hvcsd->p_location_code[0]);  in hvcs_partner_clcs_show()
337 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_partner_clcs_show()
356 	struct hvcs_struct *hvcsd = from_vio_dev(viod);  in hvcs_current_vty_show()  local
360 	spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_current_vty_show()
361 	retval = sprintf(buf, "%s\n", &hvcsd->p_location_code[0]);  in hvcs_current_vty_show()
362 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_current_vty_show()
373 	struct hvcs_struct *hvcsd = from_vio_dev(viod);  in hvcs_vterm_state_store()  local
380 	spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_vterm_state_store()
382 	if (hvcsd->port.count > 0) {  in hvcs_vterm_state_store()
383 		spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_vterm_state_store()
389 	if (hvcsd->connected == 0) {  in hvcs_vterm_state_store()
390 		spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_vterm_state_store()
396 	hvcs_partner_free(hvcsd);  in hvcs_vterm_state_store()
399 			hvcsd->vdev->unit_address,  in hvcs_vterm_state_store()
400 			hvcsd->p_unit_address,  in hvcs_vterm_state_store()
401 			(uint32_t)hvcsd->p_partition_ID);  in hvcs_vterm_state_store()
403 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_vterm_state_store()
410 	struct hvcs_struct *hvcsd = from_vio_dev(viod);  in hvcs_vterm_state_show()  local
414 	spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_vterm_state_show()
415 	retval = sprintf(buf, "%d\n", hvcsd->connected);  in hvcs_vterm_state_show()
416 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_vterm_state_show()
425 	struct hvcs_struct *hvcsd = from_vio_dev(viod);  in hvcs_index_show()  local
429 	spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_index_show()
430 	retval = sprintf(buf, "%d\n", hvcsd->index);  in hvcs_index_show()
431 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_index_show()
487 	struct hvcs_struct *hvcsd = tty->driver_data;  in hvcs_unthrottle()  local
490 	spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_unthrottle()
491 	hvcsd->todo_mask |= HVCS_SCHED_READ;  in hvcs_unthrottle()
492 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_unthrottle()
498 	struct hvcs_struct *hvcsd = tty->driver_data;  in hvcs_throttle()  local
501 	spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_throttle()
502 	vio_disable_interrupts(hvcsd->vdev);  in hvcs_throttle()
503 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_throttle()
513 	struct hvcs_struct *hvcsd = dev_instance;  in hvcs_handle_interrupt()  local
515 	spin_lock(&hvcsd->lock);  in hvcs_handle_interrupt()
516 	vio_disable_interrupts(hvcsd->vdev);  in hvcs_handle_interrupt()
517 	hvcsd->todo_mask |= HVCS_SCHED_READ;  in hvcs_handle_interrupt()
518 	spin_unlock(&hvcsd->lock);  in hvcs_handle_interrupt()
525 static void hvcs_try_write(struct hvcs_struct *hvcsd)  in hvcs_try_write()  argument
527 	uint32_t unit_address = hvcsd->vdev->unit_address;  in hvcs_try_write()
528 	struct tty_struct *tty = hvcsd->port.tty;  in hvcs_try_write()
531 	if (hvcsd->todo_mask & HVCS_TRY_WRITE) {  in hvcs_try_write()
534 				&hvcsd->buffer[0],  in hvcs_try_write()
535 				hvcsd->chars_in_buffer );  in hvcs_try_write()
537 			hvcsd->chars_in_buffer = 0;  in hvcs_try_write()
539 			hvcsd->todo_mask &= ~(HVCS_TRY_WRITE);  in hvcs_try_write()
555 static int hvcs_io(struct hvcs_struct *hvcsd)  in hvcs_io()  argument
563 	spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_io()
565 	unit_address = hvcsd->vdev->unit_address;  in hvcs_io()
566 	tty = hvcsd->port.tty;  in hvcs_io()
568 	hvcs_try_write(hvcsd);  in hvcs_io()
571 		hvcsd->todo_mask &= ~(HVCS_READ_MASK);  in hvcs_io()
573 	} else if (!(hvcsd->todo_mask & (HVCS_READ_MASK)))  in hvcs_io()
577 	hvcsd->todo_mask &= ~(HVCS_READ_MASK);  in hvcs_io()
579 	if (tty_buffer_request_room(&hvcsd->port, HVCS_BUFF_LEN) >= HVCS_BUFF_LEN) {  in hvcs_io()
583 		tty_insert_flip_string(&hvcsd->port, buf, got);  in hvcs_io()
588 		hvcsd->todo_mask |= HVCS_QUICK_READ;  in hvcs_io()
590 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_io()
593 		tty_flip_buffer_push(&hvcsd->port);  in hvcs_io()
596 		spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_io()
597 		vio_enable_interrupts(hvcsd->vdev);  in hvcs_io()
598 		spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_io()
601 	return hvcsd->todo_mask;  in hvcs_io()
604 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_io()
605 	return hvcsd->todo_mask;  in hvcs_io()
610 	struct hvcs_struct *hvcsd;  in khvcsd()  local
621 		list_for_each_entry(hvcsd, &hvcs_structs, next) {  in khvcsd()
622 			hvcs_todo_mask |= hvcs_io(hvcsd);  in khvcsd()
666 	struct hvcs_struct *hvcsd = container_of(p, struct hvcs_struct, port);  in hvcs_destruct_port()  local
671 	spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_destruct_port()
673 	comp = hvcsd->destroyed;  in hvcs_destruct_port()
675 	list_del(&(hvcsd->next));  in hvcs_destruct_port()
677 	if (hvcsd->connected == 1) {  in hvcs_destruct_port()
678 		hvcs_partner_free(hvcsd);  in hvcs_destruct_port()
681 				hvcsd->vdev->unit_address,  in hvcs_destruct_port()
682 				hvcsd->p_unit_address,  in hvcs_destruct_port()
683 				(uint32_t)hvcsd->p_partition_ID);  in hvcs_destruct_port()
686 			hvcsd->vdev->unit_address);  in hvcs_destruct_port()
688 	hvcsd->vdev = NULL;  in hvcs_destruct_port()
690 	hvcsd->p_unit_address = 0;  in hvcs_destruct_port()
691 	hvcsd->p_partition_ID = 0;  in hvcs_destruct_port()
692 	hvcsd->destroyed = NULL;  in hvcs_destruct_port()
693 	hvcs_return_index(hvcsd->index);  in hvcs_destruct_port()
694 	memset(&hvcsd->p_location_code[0], 0x00, HVCS_CLC_LENGTH + 1);  in hvcs_destruct_port()
696 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_destruct_port()
699 	kfree(hvcsd);  in hvcs_destruct_port()
730 	struct hvcs_struct *hvcsd;  in hvcs_probe()  local
751 	hvcsd = kzalloc(sizeof(*hvcsd), GFP_KERNEL);  in hvcs_probe()
752 	if (!hvcsd)  in hvcs_probe()
755 	tty_port_init(&hvcsd->port);  in hvcs_probe()
756 	hvcsd->port.ops = &hvcs_port_ops;  in hvcs_probe()
757 	spin_lock_init(&hvcsd->lock);  in hvcs_probe()
759 	hvcsd->vdev = dev;  in hvcs_probe()
760 	dev_set_drvdata(&dev->dev, hvcsd);  in hvcs_probe()
762 	hvcsd->index = index;  in hvcs_probe()
765 	hvcsd->chars_in_buffer = 0;  in hvcs_probe()
766 	hvcsd->todo_mask = 0;  in hvcs_probe()
767 	hvcsd->connected = 0;  in hvcs_probe()
773 	if (hvcs_get_pi(hvcsd)) {  in hvcs_probe()
776 			hvcsd->vdev->unit_address);  in hvcs_probe()
785 	list_add_tail(&(hvcsd->next), &hvcs_structs);  in hvcs_probe()
799 	struct hvcs_struct *hvcsd = dev_get_drvdata(&dev->dev);  in hvcs_remove()  local
806 	spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_remove()
808 	hvcsd->destroyed = ∁  in hvcs_remove()
809 	tty = tty_port_tty_get(&hvcsd->port);  in hvcs_remove()
811 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_remove()
822 	tty_port_put(&hvcsd->port);  in hvcs_remove()
840 static void hvcs_set_pi(struct hvcs_partner_info *pi, struct hvcs_struct *hvcsd)  in hvcs_set_pi()  argument
842 	hvcsd->p_unit_address = pi->unit_address;  in hvcs_set_pi()
843 	hvcsd->p_partition_ID  = pi->partition_ID;  in hvcs_set_pi()
846 	strscpy(hvcsd->p_location_code, pi->location_code,  in hvcs_set_pi()
847 		sizeof(hvcsd->p_location_code));  in hvcs_set_pi()
863 static int hvcs_get_pi(struct hvcs_struct *hvcsd)  in hvcs_get_pi()  argument
866 	uint32_t unit_address = hvcsd->vdev->unit_address;  in hvcs_get_pi()
884 	hvcsd->p_unit_address = 0;  in hvcs_get_pi()
885 	hvcsd->p_partition_ID = 0;  in hvcs_get_pi()
888 		hvcs_set_pi(pi, hvcsd);  in hvcs_get_pi()
900 	struct hvcs_struct *hvcsd;  in hvcs_rescan_devices_list()  local
905 	list_for_each_entry(hvcsd, &hvcs_structs, next) {  in hvcs_rescan_devices_list()
906 		spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_rescan_devices_list()
907 		hvcs_get_pi(hvcsd);  in hvcs_rescan_devices_list()
908 		spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_rescan_devices_list()
921 static int hvcs_has_pi(struct hvcs_struct *hvcsd)  in hvcs_has_pi()  argument
923 	if ((!hvcsd->p_unit_address) || (!hvcsd->p_partition_ID))  in hvcs_has_pi()
934 static int hvcs_partner_connect(struct hvcs_struct *hvcsd)  in hvcs_partner_connect()  argument
937 	unsigned int unit_address = hvcsd->vdev->unit_address;  in hvcs_partner_connect()
947 			hvcsd->p_partition_ID,  in hvcs_partner_connect()
948 			hvcsd->p_unit_address);  in hvcs_partner_connect()
950 		hvcsd->connected = 1;  in hvcs_partner_connect()
959 	if (hvcs_get_pi(hvcsd))  in hvcs_partner_connect()
962 	if (!hvcs_has_pi(hvcsd))  in hvcs_partner_connect()
966 			hvcsd->p_partition_ID,  in hvcs_partner_connect()
967 			hvcsd->p_unit_address);  in hvcs_partner_connect()
969 		hvcsd->connected = 1;  in hvcs_partner_connect()
985 static void hvcs_partner_free(struct hvcs_struct *hvcsd)  in hvcs_partner_free()  argument
989 		retval = hvcs_free_connection(hvcsd->vdev->unit_address);  in hvcs_partner_free()
991 	hvcsd->connected = 0;  in hvcs_partner_free()
995 static int hvcs_enable_device(struct hvcs_struct *hvcsd, uint32_t unit_address,  in hvcs_enable_device()  argument
1005 	rc = request_irq(irq, &hvcs_handle_interrupt, 0, "ibmhvcs", hvcsd);  in hvcs_enable_device()
1016 			free_irq(irq, hvcsd);  in hvcs_enable_device()
1022 	spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_enable_device()
1023 	hvcs_partner_free(hvcsd);  in hvcs_enable_device()
1024 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_enable_device()
1039 	struct hvcs_struct *hvcsd;  in hvcs_get_by_index()  local
1043 	list_for_each_entry(hvcsd, &hvcs_structs, next) {  in hvcs_get_by_index()
1044 		spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_get_by_index()
1045 		if (hvcsd->index == index) {  in hvcs_get_by_index()
1046 			tty_port_get(&hvcsd->port);  in hvcs_get_by_index()
1047 			spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_get_by_index()
1049 			return hvcsd;  in hvcs_get_by_index()
1051 		spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_get_by_index()
1060 	struct hvcs_struct *hvcsd;  in hvcs_install()  local
1070 	hvcsd = hvcs_get_by_index(tty->index);  in hvcs_install()
1071 	if (!hvcsd) {  in hvcs_install()
1077 	spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_install()
1079 	if (hvcsd->connected == 0) {  in hvcs_install()
1080 		retval = hvcs_partner_connect(hvcsd);  in hvcs_install()
1082 			spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_install()
1088 	hvcsd->port.count = 0;  in hvcs_install()
1089 	hvcsd->port.tty = tty;  in hvcs_install()
1090 	tty->driver_data = hvcsd;  in hvcs_install()
1092 	memset(&hvcsd->buffer[0], 0x00, HVCS_BUFF_LEN);  in hvcs_install()
1098 	irq = hvcsd->vdev->irq;  in hvcs_install()
1099 	vdev = hvcsd->vdev;  in hvcs_install()
1100 	unit_address = hvcsd->vdev->unit_address;  in hvcs_install()
1102 	hvcsd->todo_mask |= HVCS_SCHED_READ;  in hvcs_install()
1103 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_install()
1109 	retval = hvcs_enable_device(hvcsd, unit_address, irq, vdev);  in hvcs_install()
1115 	retval = tty_port_install(&hvcsd->port, driver, tty);  in hvcs_install()
1121 	spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_install()
1122 	vio_disable_interrupts(hvcsd->vdev);  in hvcs_install()
1123 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_install()
1124 	free_irq(irq, hvcsd);  in hvcs_install()
1126 	tty_port_put(&hvcsd->port);  in hvcs_install()
1137 	struct hvcs_struct *hvcsd = tty->driver_data;  in hvcs_open()  local
1140 	spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_open()
1141 	hvcsd->port.count++;  in hvcs_open()
1142 	hvcsd->todo_mask |= HVCS_SCHED_READ;  in hvcs_open()
1143 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_open()
1148 		hvcsd->vdev->unit_address );  in hvcs_open()
1155 	struct hvcs_struct *hvcsd;  in hvcs_close()  local
1174 	hvcsd = tty->driver_data;  in hvcs_close()
1176 	spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_close()
1177 	if (hvcsd->port.count == 0) {  in hvcs_close()
1178 		spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_close()
1180 	} else if (--hvcsd->port.count == 0) {  in hvcs_close()
1182 		vio_disable_interrupts(hvcsd->vdev);  in hvcs_close()
1189 		hvcsd->port.tty = NULL;  in hvcs_close()
1191 		irq = hvcsd->vdev->irq;  in hvcs_close()
1192 		spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_close()
1196 		free_irq(irq, hvcsd);  in hvcs_close()
1198 	} else if (hvcsd->port.count < 0) {  in hvcs_close()
1200 		hvcsd->vdev->unit_address, hvcsd->port.count);  in hvcs_close()
1203 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_close()
1208 	struct hvcs_struct *hvcsd = tty->driver_data;  in hvcs_cleanup()  local
1217 	tty_port_put(&hvcsd->port);  in hvcs_cleanup()
1222 	struct hvcs_struct *hvcsd = tty->driver_data;  in hvcs_hangup()  local
1226 	spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_hangup()
1233 	vio_disable_interrupts(hvcsd->vdev);  in hvcs_hangup()
1235 	hvcsd->todo_mask = 0;  in hvcs_hangup()
1236 	hvcsd->port.tty = NULL;  in hvcs_hangup()
1237 	hvcsd->port.count = 0;  in hvcs_hangup()
1241 	memset(&hvcsd->buffer[0], 0x00, HVCS_BUFF_LEN);  in hvcs_hangup()
1242 	hvcsd->chars_in_buffer = 0;  in hvcs_hangup()
1244 	irq = hvcsd->vdev->irq;  in hvcs_hangup()
1246 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_hangup()
1248 	free_irq(irq, hvcsd);  in hvcs_hangup()
1260 	struct hvcs_struct *hvcsd = tty->driver_data;  in hvcs_write()  local
1272 	if (!hvcsd)  in hvcs_write()
1284 	spin_lock_irqsave(&hvcsd->lock, flags);  in hvcs_write()
1292 	if (hvcsd->port.count <= 0) {  in hvcs_write()
1293 		spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_write()
1297 	unit_address = hvcsd->vdev->unit_address;  in hvcs_write()
1301 			       (HVCS_BUFF_LEN - hvcsd->chars_in_buffer));  in hvcs_write()
1309 		memcpy(&hvcsd->buffer[hvcsd->chars_in_buffer],  in hvcs_write()
1313 		hvcsd->chars_in_buffer += tosend;  in hvcs_write()
1322 		if (!(hvcsd->todo_mask & HVCS_TRY_WRITE))  in hvcs_write()
1325 					&hvcsd->buffer[0],  in hvcs_write()
1326 					hvcsd->chars_in_buffer);  in hvcs_write()
1336 			hvcsd->todo_mask |= HVCS_TRY_WRITE;  in hvcs_write()
1341 		hvcsd->chars_in_buffer = 0;  in hvcs_write()
1350 	spin_unlock_irqrestore(&hvcsd->lock, flags);  in hvcs_write()
1365 	struct hvcs_struct *hvcsd = tty->driver_data;  in hvcs_write_room()  local
1367 	if (!hvcsd || hvcsd->port.count <= 0)  in hvcs_write_room()
1370 	return HVCS_BUFF_LEN - hvcsd->chars_in_buffer;  in hvcs_write_room()
1375 	struct hvcs_struct *hvcsd = tty->driver_data;  in hvcs_chars_in_buffer()  local
1377 	return hvcsd->chars_in_buffer;  in hvcs_chars_in_buffer()