s390/char/raw3270.c

52 	struct raw3270_view *view;	/* Active view. */
96  * Wait queue for device init/delete, view delete.
127 		x = max_t(int, 0, rp->view->cols + x);
129 		y = max_t(int, 0, rp->view->rows + y);
130 	addr = (y * rp->view->cols) + x;
250 static int __raw3270_start(struct raw3270 *rp, struct raw3270_view *view,
253 	rq->view = view;
254 	raw3270_get_view(view);
261 			raw3270_put_view(view);
269 int raw3270_view_active(struct raw3270_view *view)
271 	struct raw3270 *rp = view->dev;
273 	return rp && rp->view == view;
276 int raw3270_start(struct raw3270_view *view, struct raw3270_request *rq)
282 	spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags);
283 	rp = view->dev;
284 	if (!rp || rp->view != view)
289 		rc =  __raw3270_start(rp, view, rq);
290 	spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags);
295 int raw3270_start_request(struct raw3270_view *view, struct raw3270_request *rq,
307 	return raw3270_start(view, rq);
311 int raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq)
316 	rp = view->dev;
317 	if (!rp || rp->view != view)
322 		rc =  __raw3270_start(rp, view, rq);
327 int raw3270_start_irq(struct raw3270_view *view, struct raw3270_request *rq)
331 	rp = view->dev;
332 	rq->view = view;
333 	raw3270_get_view(view);
345 	struct raw3270_view *view;
352 	view = rq ? rq->view : rp->view;
369 		/* Call interrupt handler of the view */
370 		if (view)
371 			view->fn->intv(view, rq, irb);
384 		raw3270_put_view(view);
402 		raw3270_put_view(view);
540 	struct raw3270_view *view;
543 	list_for_each_entry(view, &rp->view_list, list) {
544 		if (view->fn->resize)
545 			view->fn->resize(view, rp->model, rp->rows, rp->cols,
551 	/* Setup processing done, now activate a view */
552 	list_for_each_entry(view, &rp->view_list, list) {
553 		rp->view = view;
554 		if (view->fn->activate(view) == 0)
556 		rp->view = NULL;
562 	rp->view = NULL;
569 	struct raw3270 *rp = rq->view->dev;
616 	struct raw3270 *rp = rq->view->dev;
637 	if (rp->init_reset.view)
663 int raw3270_reset(struct raw3270_view *view)
668 	rp = view->dev;
669 	if (!rp || rp->view != view)
674 		rc = raw3270_reset_device(view->dev);
682 	struct raw3270_view *view;
685 	rp->view = &rp->init_view;
689 		view = rq->view;
694 		raw3270_put_view(view);
700 static void raw3270_init_irq(struct raw3270_view *view, struct raw3270_request *rq,
715 		rp = view->dev;
756 	rp->view = &rp->init_view;
882  * view in the panic() context, due to locking restrictions.
884 int raw3270_view_lock_unavailable(struct raw3270_view *view)
886 	struct raw3270 *rp = view->dev;
895 static int raw3270_assign_activate_view(struct raw3270 *rp, struct raw3270_view *view)
897 	rp->view = view;
898 	return view->fn->activate(view);
901 static int __raw3270_activate_view(struct raw3270 *rp, struct raw3270_view *view)
906 	if (rp->view == view)
912 	if (rp->view && rp->view->fn->deactivate) {
913 		oldview = rp->view;
917 	rc = raw3270_assign_activate_view(rp, view);
921 	/* Didn't work. Try to reactivate the old view. */
928 	/* Didn't work as well. Try any other view. */
930 		if (nv == view || nv == oldview)
935 		rp->view = NULL;
941  * Activate a view.
943 int raw3270_activate_view(struct raw3270_view *view)
949 	rp = view->dev;
953 	rc = __raw3270_activate_view(rp, view);
960  * Deactivate current view.
962 void raw3270_deactivate_view(struct raw3270_view *view)
967 	rp = view->dev;
971 	if (rp->view == view) {
972 		view->fn->deactivate(view);
973 		rp->view = NULL;
974 		/* Move deactivated view to end of list. */
975 		list_del_init(&view->list);
976 		list_add_tail(&view->list, &rp->view_list);
977 		/* Try to activate another view. */
979 			list_for_each_entry(view, &rp->view_list, list) {
980 				rp->view = view;
981 				if (view->fn->activate(view) == 0)
983 				rp->view = NULL;
992  * Add view to device with minor "minor".
994 int raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn,
1009 		atomic_set(&view->ref_count, 2);
1010 		view->dev = rp;
1011 		view->fn = fn;
1012 		view->model = rp->model;
1013 		view->rows = rp->rows;
1014 		view->cols = rp->cols;
1015 		view->ascebc = rp->ascebc;
1016 		spin_lock_init(&view->lock);
1017 		lockdep_set_subclass(&view->lock, subclass);
1018 		list_add(&view->list, &rp->view_list);
1029  * Find specific view of device with minor "minor".
1034 	struct raw3270_view *view, *tmp;
1038 	view = ERR_PTR(-ENODEV);
1046 				view = tmp;
1054 	return view;
1059  * Remove view from device and free view structure via call to view->fn->free.
1061 void raw3270_del_view(struct raw3270_view *view)
1067 	rp = view->dev;
1069 	if (rp->view == view) {
1070 		view->fn->deactivate(view);
1071 		rp->view = NULL;
1073 	list_del_init(&view->list);
1074 	if (!rp->view && raw3270_state_ready(rp)) {
1075 		/* Try to activate another view. */
1078 				rp->view = nv;
1085 	atomic_dec(&view->ref_count);
1086 	wait_event(raw3270_wait_queue, atomic_read(&view->ref_count) == 0);
1087 	if (view->fn->free)
1088 		view->fn->free(view);
1246 	/* Deactivate current view and remove all views. */
1248 	if (rp->view) {
1249 		if (rp->view->fn->deactivate)
1250 			rp->view->fn->deactivate(rp->view);
1251 		rp->view = NULL;