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;
248 static int __raw3270_start(struct raw3270 *rp, struct raw3270_view *view,
251 	rq->view = view;
252 	raw3270_get_view(view);
259 			raw3270_put_view(view);
267 int raw3270_view_active(struct raw3270_view *view)
269 	struct raw3270 *rp = view->dev;
271 	return rp && rp->view == view;
274 int raw3270_start(struct raw3270_view *view, struct raw3270_request *rq)
280 	spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags);
281 	rp = view->dev;
282 	if (!rp || rp->view != view)
287 		rc =  __raw3270_start(rp, view, rq);
288 	spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags);
293 int raw3270_start_request(struct raw3270_view *view, struct raw3270_request *rq,
305 	return raw3270_start(view, rq);
309 int raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq)
314 	rp = view->dev;
315 	if (!rp || rp->view != view)
320 		rc =  __raw3270_start(rp, view, rq);
325 int raw3270_start_irq(struct raw3270_view *view, struct raw3270_request *rq)
329 	rp = view->dev;
330 	rq->view = view;
331 	raw3270_get_view(view);
343 	struct raw3270_view *view;
350 	view = rq ? rq->view : rp->view;
367 		/* Call interrupt handler of the view */
368 		if (view)
369 			view->fn->intv(view, rq, irb);
382 		raw3270_put_view(view);
400 		raw3270_put_view(view);
538 	struct raw3270_view *view;
541 	list_for_each_entry(view, &rp->view_list, list) {
542 		if (view->fn->resize)
543 			view->fn->resize(view, rp->model, rp->rows, rp->cols,
549 	/* Setup processing done, now activate a view */
550 	list_for_each_entry(view, &rp->view_list, list) {
551 		rp->view = view;
552 		if (view->fn->activate(view) == 0)
554 		rp->view = NULL;
560 	rp->view = NULL;
567 	struct raw3270 *rp = rq->view->dev;
614 	struct raw3270 *rp = rq->view->dev;
635 	if (rp->init_reset.view)
661 int raw3270_reset(struct raw3270_view *view)
666 	rp = view->dev;
667 	if (!rp || rp->view != view)
672 		rc = raw3270_reset_device(view->dev);
680 	struct raw3270_view *view;
683 	rp->view = &rp->init_view;
687 		view = rq->view;
692 		raw3270_put_view(view);
698 static void raw3270_init_irq(struct raw3270_view *view, struct raw3270_request *rq,
713 		rp = view->dev;
754 	rp->view = &rp->init_view;
880  * view in the panic() context, due to locking restrictions.
882 int raw3270_view_lock_unavailable(struct raw3270_view *view)
884 	struct raw3270 *rp = view->dev;
893 static int raw3270_assign_activate_view(struct raw3270 *rp, struct raw3270_view *view)
895 	rp->view = view;
896 	return view->fn->activate(view);
899 static int __raw3270_activate_view(struct raw3270 *rp, struct raw3270_view *view)
904 	if (rp->view == view)
910 	if (rp->view && rp->view->fn->deactivate) {
911 		oldview = rp->view;
915 	rc = raw3270_assign_activate_view(rp, view);
919 	/* Didn't work. Try to reactivate the old view. */
926 	/* Didn't work as well. Try any other view. */
928 		if (nv == view || nv == oldview)
933 		rp->view = NULL;
939  * Activate a view.
941 int raw3270_activate_view(struct raw3270_view *view)
947 	rp = view->dev;
951 	rc = __raw3270_activate_view(rp, view);
958  * Deactivate current view.
960 void raw3270_deactivate_view(struct raw3270_view *view)
965 	rp = view->dev;
969 	if (rp->view == view) {
970 		view->fn->deactivate(view);
971 		rp->view = NULL;
972 		/* Move deactivated view to end of list. */
973 		list_del_init(&view->list);
974 		list_add_tail(&view->list, &rp->view_list);
975 		/* Try to activate another view. */
977 			list_for_each_entry(view, &rp->view_list, list) {
978 				rp->view = view;
979 				if (view->fn->activate(view) == 0)
981 				rp->view = NULL;
990  * Add view to device with minor "minor".
992 int raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn,
1007 		atomic_set(&view->ref_count, 2);
1008 		view->dev = rp;
1009 		view->fn = fn;
1010 		view->model = rp->model;
1011 		view->rows = rp->rows;
1012 		view->cols = rp->cols;
1013 		view->ascebc = rp->ascebc;
1014 		spin_lock_init(&view->lock);
1015 		lockdep_set_subclass(&view->lock, subclass);
1016 		list_add(&view->list, &rp->view_list);
1027  * Find specific view of device with minor "minor".
1032 	struct raw3270_view *view, *tmp;
1036 	view = ERR_PTR(-ENODEV);
1044 				view = tmp;
1052 	return view;
1057  * Remove view from device and free view structure via call to view->fn->free.
1059 void raw3270_del_view(struct raw3270_view *view)
1065 	rp = view->dev;
1067 	if (rp->view == view) {
1068 		view->fn->deactivate(view);
1069 		rp->view = NULL;
1071 	list_del_init(&view->list);
1072 	if (!rp->view && raw3270_state_ready(rp)) {
1073 		/* Try to activate another view. */
1076 				rp->view = nv;
1083 	atomic_dec(&view->ref_count);
1084 	wait_event(raw3270_wait_queue, atomic_read(&view->ref_count) == 0);
1085 	if (view->fn->free)
1086 		view->fn->free(view);
1244 	/* Deactivate current view and remove all views. */
1246 	if (rp->view) {
1247 		if (rp->view->fn->deactivate)
1248 			rp->view->fn->deactivate(rp->view);
1249 		rp->view = NULL;