platforms/pseries/io_event_irq.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Copyright 2010 2011 Mark Nelson and Tseng-Hui (Frank) Lin, IBM Corporation
24  * information about hardware error and non-error events. Device
41  * 	if (! is_my_event(p->scope, p->event_type)) return NOTIFY_DONE;
75 	/* We should only ever get called for io-event interrupts, but if  in ioei_find_event()
94 	return (struct pseries_io_event *) &sect->data;  in ioei_find_event()
99  * - check-exception returns the first found error or event and clear that
101  * - Each interrupt returns one event. If a plateform chooses to report
103  *   interrupt remains asserted until check-exception has been used to
104  *   process all out-standing events for that interrupt.
107  * - Events must be processed in the order they are returned. Hence,
109  * - The owner of an event is determined by combinations of scope,
110  *   event type, and sub-type. There is no easy way to pre-sort clients
113  *   0x3B (Torrent-hub). It is better to let the clients to identify
148 		return -ENODEV;  in ioei_init()
150 	np = of_find_node_by_path("/event-sources/ibm,io-events");  in ioei_init()
156 		return -ENODEV;  in ioei_init()