1 // SPDX-License-Identifier: GPL-2.0-or-later
15 #include <asm/ppc-pci.h>
21  *  This pair of routines creates an event and queues it onto a
22  *  work-queue, where a worker thread can drive recovery.
30  * eeh_event_handler - Dispatch EEH events.
31  * @dummy - unused
36  * of the interrupt handler, and re-dispatch them for processing
42 	struct eeh_event *event;  in eeh_event_handler()  local
48 		/* Fetch EEH event from the queue */  in eeh_event_handler()
50 		event = NULL;  in eeh_event_handler()
52 			event = list_entry(eeh_eventlist.next,  in eeh_event_handler()
54 			list_del(&event->list);  in eeh_event_handler()
57 		if (!event)  in eeh_event_handler()
60 		/* We might have event without binding PE */  in eeh_event_handler()
61 		if (event->pe)  in eeh_event_handler()
62 			eeh_handle_normal_event(event->pe);  in eeh_event_handler()
66 		kfree(event);  in eeh_event_handler()
73  * eeh_event_init - Start kernel thread to handle EEH events
76  * EEH event.
95  * eeh_send_failure_event - Generate a PCI error event
99  * the actual event will be delivered in a normal context
105 	struct eeh_event *event;  in __eeh_send_failure_event()  local
107 	event = kzalloc(sizeof(*event), GFP_ATOMIC);  in __eeh_send_failure_event()
108 	if (!event) {  in __eeh_send_failure_event()
109 		pr_err("EEH: out of memory, event not handled\n");  in __eeh_send_failure_event()
110 		return -ENOMEM;  in __eeh_send_failure_event()
112 	event->pe = pe;  in __eeh_send_failure_event()
117 	 * while the PE is sitting in the event queue.  in __eeh_send_failure_event()
123 		 * event handler thread.  in __eeh_send_failure_event()
125 		pe->trace_entries = stack_trace_save(pe->stack_trace,  in __eeh_send_failure_event()
126 					 ARRAY_SIZE(pe->stack_trace), 0);  in __eeh_send_failure_event()
134 	list_add(&event->list, &eeh_eventlist);  in __eeh_send_failure_event()
150 		pr_err("EEH: Event dropped due to no_recover setting\n");  in eeh_send_failure_event()
158  * eeh_remove_event - Remove EEH event from the queue
159  * @pe: Event binding to the PE
160  * @force: Event will be removed unconditionally
170 	struct eeh_event *event, *tmp;  in eeh_remove_event()  local
177 	 * With "force", the event with associated PE that  in eeh_remove_event()
178 	 * have been isolated, the event won't be removed  in eeh_remove_event()
179 	 * to avoid event lost.  in eeh_remove_event()
182 	list_for_each_entry_safe(event, tmp, &eeh_eventlist, list) {  in eeh_remove_event()
183 		if (!force && event->pe &&  in eeh_remove_event()
184 		    (event->pe->state & EEH_PE_ISOLATED))  in eeh_remove_event()
188 			list_del(&event->list);  in eeh_remove_event()
189 			kfree(event);  in eeh_remove_event()
190 		} else if (pe->type & EEH_PE_PHB) {  in eeh_remove_event()
191 			if (event->pe && event->pe->phb == pe->phb) {  in eeh_remove_event()
192 				list_del(&event->list);  in eeh_remove_event()
193 				kfree(event);  in eeh_remove_event()
195 		} else if (event->pe == pe) {  in eeh_remove_event()
196 			list_del(&event->list);  in eeh_remove_event()
197 			kfree(event);  in eeh_remove_event()