s390/char/raw3270.c

50 	struct raw3270_view *view;	/* Active view. */
94  * Wait queue for device init/delete, view delete.
125 		x = max_t(int, 0, rp->view->cols + x);
127 		y = max_t(int, 0, rp->view->rows + y);
128 	addr = (y * rp->view->cols) + x;
246 static int __raw3270_start(struct raw3270 *rp, struct raw3270_view *view,
249 	rq->view = view;
250 	raw3270_get_view(view);
257 			raw3270_put_view(view);
265 int raw3270_view_active(struct raw3270_view *view)
267 	struct raw3270 *rp = view->dev;
269 	return rp && rp->view == view;
272 int raw3270_start(struct raw3270_view *view, struct raw3270_request *rq)
278 	spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags);
279 	rp = view->dev;
280 	if (!rp || rp->view != view)
285 		rc =  __raw3270_start(rp, view, rq);
286 	spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags);
291 int raw3270_start_request(struct raw3270_view *view, struct raw3270_request *rq,
303 	return raw3270_start(view, rq);
307 int raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq)
312 	rp = view->dev;
313 	if (!rp || rp->view != view)
318 		rc =  __raw3270_start(rp, view, rq);
323 int raw3270_start_irq(struct raw3270_view *view, struct raw3270_request *rq)
327 	rp = view->dev;
328 	rq->view = view;
329 	raw3270_get_view(view);
341 	struct raw3270_view *view;
348 	view = rq ? rq->view : rp->view;
365 		/* Call interrupt handler of the view */
366 		if (view)
367 			view->fn->intv(view, rq, irb);
380 		raw3270_put_view(view);
398 		raw3270_put_view(view);
536 	struct raw3270_view *view;
539 	list_for_each_entry(view, &rp->view_list, list) {
540 		if (view->fn->resize)
541 			view->fn->resize(view, rp->model, rp->rows, rp->cols,
547 	/* Setup processing done, now activate a view */
548 	list_for_each_entry(view, &rp->view_list, list) {
549 		rp->view = view;
550 		if (view->fn->activate(view) == 0)
552 		rp->view = NULL;
558 	rp->view = NULL;
565 	struct raw3270 *rp = rq->view->dev;
612 	struct raw3270 *rp = rq->view->dev;
633 	if (rp->init_reset.view)
659 int raw3270_reset(struct raw3270_view *view)
664 	rp = view->dev;
665 	if (!rp || rp->view != view)
670 		rc = raw3270_reset_device(view->dev);
678 	struct raw3270_view *view;
681 	rp->view = &rp->init_view;
685 		view = rq->view;
690 		raw3270_put_view(view);
696 static void raw3270_init_irq(struct raw3270_view *view, struct raw3270_request *rq,
711 		rp = view->dev;
752 	rp->view = &rp->init_view;
878  * view in the panic() context, due to locking restrictions.
880 int raw3270_view_lock_unavailable(struct raw3270_view *view)
882 	struct raw3270 *rp = view->dev;
891 static int raw3270_assign_activate_view(struct raw3270 *rp, struct raw3270_view *view)
893 	rp->view = view;
894 	return view->fn->activate(view);
897 static int __raw3270_activate_view(struct raw3270 *rp, struct raw3270_view *view)
902 	if (rp->view == view)
908 	if (rp->view && rp->view->fn->deactivate) {
909 		oldview = rp->view;
913 	rc = raw3270_assign_activate_view(rp, view);
917 	/* Didn't work. Try to reactivate the old view. */
924 	/* Didn't work as well. Try any other view. */
926 		if (nv == view || nv == oldview)
931 		rp->view = NULL;
937  * Activate a view.
939 int raw3270_activate_view(struct raw3270_view *view)
945 	rp = view->dev;
949 	rc = __raw3270_activate_view(rp, view);
956  * Deactivate current view.
958 void raw3270_deactivate_view(struct raw3270_view *view)
963 	rp = view->dev;
967 	if (rp->view == view) {
968 		view->fn->deactivate(view);
969 		rp->view = NULL;
970 		/* Move deactivated view to end of list. */
971 		list_del_init(&view->list);
972 		list_add_tail(&view->list, &rp->view_list);
973 		/* Try to activate another view. */
975 			list_for_each_entry(view, &rp->view_list, list) {
976 				rp->view = view;
977 				if (view->fn->activate(view) == 0)
979 				rp->view = NULL;
988  * Add view to device with minor "minor".
990 int raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn,
1005 		atomic_set(&view->ref_count, 2);
1006 		view->dev = rp;
1007 		view->fn = fn;
1008 		view->model = rp->model;
1009 		view->rows = rp->rows;
1010 		view->cols = rp->cols;
1011 		view->ascebc = rp->ascebc;
1012 		spin_lock_init(&view->lock);
1013 		lockdep_set_subclass(&view->lock, subclass);
1014 		list_add(&view->list, &rp->view_list);
1025  * Find specific view of device with minor "minor".
1030 	struct raw3270_view *view, *tmp;
1034 	view = ERR_PTR(-ENODEV);
1042 				view = tmp;
1050 	return view;
1055  * Remove view from device and free view structure via call to view->fn->free.
1057 void raw3270_del_view(struct raw3270_view *view)
1063 	rp = view->dev;
1065 	if (rp->view == view) {
1066 		view->fn->deactivate(view);
1067 		rp->view = NULL;
1069 	list_del_init(&view->list);
1070 	if (!rp->view && raw3270_state_ready(rp)) {
1071 		/* Try to activate another view. */
1074 				rp->view = nv;
1081 	atomic_dec(&view->ref_count);
1082 	wait_event(raw3270_wait_queue, atomic_read(&view->ref_count) == 0);
1083 	if (view->fn->free)
1084 		view->fn->free(view);
1242 	/* Deactivate current view and remove all views. */
1244 	if (rp->view) {
1245 		if (rp->view->fn->deactivate)
1246 			rp->view->fn->deactivate(rp->view);
1247 		rp->view = NULL;