diff options
Diffstat (limited to 'arch/powerpc/platforms/pseries/eeh_event.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/eeh_event.c | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/arch/powerpc/platforms/pseries/eeh_event.c b/arch/powerpc/platforms/pseries/eeh_event.c deleted file mode 100644 index 9a9961f2748..00000000000 --- a/arch/powerpc/platforms/pseries/eeh_event.c +++ /dev/null @@ -1,140 +0,0 @@ -/* - * eeh_event.c - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * Copyright (c) 2005 Linas Vepstas <linas@linas.org> - */ - -#include <linux/list.h> -#include <linux/pci.h> -#include <asm/eeh_event.h> -#include <asm/ppc-pci.h> - -/** Overview: - * EEH error states may be detected within exception handlers; - * however, the recovery processing needs to occur asynchronously - * in a normal kernel context and not an interrupt context. - * This pair of routines creates an event and queues it onto a - * work-queue, where a worker thread can drive recovery. - */ - -/* EEH event workqueue setup. */ -static spinlock_t eeh_eventlist_lock = SPIN_LOCK_UNLOCKED; -LIST_HEAD(eeh_eventlist); -static void eeh_thread_launcher(void *); -DECLARE_WORK(eeh_event_wq, eeh_thread_launcher, NULL); - -/** - * eeh_event_handler - dispatch EEH events. The detection of a frozen - * slot can occur inside an interrupt, where it can be hard to do - * anything about it. The goal of this routine is to pull these - * detection events out of the context of the interrupt handler, and - * re-dispatch them for processing at a later time in a normal context. - * - * @dummy - unused - */ -static int eeh_event_handler(void * dummy) -{ - unsigned long flags; - struct eeh_event *event; - - daemonize ("eehd"); - - while (1) { - set_current_state(TASK_INTERRUPTIBLE); - - spin_lock_irqsave(&eeh_eventlist_lock, flags); - event = NULL; - - /* Unqueue the event, get ready to process. */ - if (!list_empty(&eeh_eventlist)) { - event = list_entry(eeh_eventlist.next, struct eeh_event, list); - list_del(&event->list); - } - - if (event) - eeh_mark_slot(event->dn, EEH_MODE_RECOVERING); - - spin_unlock_irqrestore(&eeh_eventlist_lock, flags); - if (event == NULL) - break; - - printk(KERN_INFO "EEH: Detected PCI bus error on device %s\n", - pci_name(event->dev)); - - handle_eeh_events(event); - - eeh_clear_slot(event->dn, EEH_MODE_RECOVERING); - - pci_dev_put(event->dev); - kfree(event); - } - - return 0; -} - -/** - * eeh_thread_launcher - * - * @dummy - unused - */ -static void eeh_thread_launcher(void *dummy) -{ - if (kernel_thread(eeh_event_handler, NULL, CLONE_KERNEL) < 0) - printk(KERN_ERR "Failed to start EEH daemon\n"); -} - -/** - * eeh_send_failure_event - generate a PCI error event - * @dev pci device - * - * This routine can be called within an interrupt context; - * the actual event will be delivered in a normal context - * (from a workqueue). - */ -int eeh_send_failure_event (struct device_node *dn, - struct pci_dev *dev, - enum pci_channel_state state, - int time_unavail) -{ - unsigned long flags; - struct eeh_event *event; - - event = kmalloc(sizeof(*event), GFP_ATOMIC); - if (event == NULL) { - printk (KERN_ERR "EEH: out of memory, event not handled\n"); - return 1; - } - - if (dev) - pci_dev_get(dev); - - event->dn = dn; - event->dev = dev; - event->state = state; - event->time_unavail = time_unavail; - - /* We may or may not be called in an interrupt context */ - spin_lock_irqsave(&eeh_eventlist_lock, flags); - list_add(&event->list, &eeh_eventlist); - spin_unlock_irqrestore(&eeh_eventlist_lock, flags); - - schedule_work(&eeh_event_wq); - - return 0; -} - -/********************** END OF FILE ******************************/ |