diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/misc/ibmasm/heartbeat.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/misc/ibmasm/heartbeat.c | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/ANDROID_3.4.5/drivers/misc/ibmasm/heartbeat.c b/ANDROID_3.4.5/drivers/misc/ibmasm/heartbeat.c deleted file mode 100644 index 90746378..00000000 --- a/ANDROID_3.4.5/drivers/misc/ibmasm/heartbeat.c +++ /dev/null @@ -1,101 +0,0 @@ - -/* - * IBM ASM Service Processor Device Driver - * - * 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) IBM Corporation, 2004 - * - * Author: Max Asböck <amax@us.ibm.com> - * - */ - -#include <linux/notifier.h> -#include "ibmasm.h" -#include "dot_command.h" -#include "lowlevel.h" - -static int suspend_heartbeats = 0; - -/* - * Once the driver indicates to the service processor that it is running - * - see send_os_state() - the service processor sends periodic heartbeats - * to the driver. The driver must respond to the heartbeats or else the OS - * will be rebooted. - * In the case of a panic the interrupt handler continues to work and thus - * continues to respond to heartbeats, making the service processor believe - * the OS is still running and thus preventing a reboot. - * To prevent this from happening a callback is added the panic_notifier_list. - * Before responding to a heartbeat the driver checks if a panic has happened, - * if yes it suspends heartbeat, causing the service processor to reboot as - * expected. - */ -static int panic_happened(struct notifier_block *n, unsigned long val, void *v) -{ - suspend_heartbeats = 1; - return 0; -} - -static struct notifier_block panic_notifier = { panic_happened, NULL, 1 }; - -void ibmasm_register_panic_notifier(void) -{ - atomic_notifier_chain_register(&panic_notifier_list, &panic_notifier); -} - -void ibmasm_unregister_panic_notifier(void) -{ - atomic_notifier_chain_unregister(&panic_notifier_list, - &panic_notifier); -} - - -int ibmasm_heartbeat_init(struct service_processor *sp) -{ - sp->heartbeat = ibmasm_new_command(sp, HEARTBEAT_BUFFER_SIZE); - if (sp->heartbeat == NULL) - return -ENOMEM; - - return 0; -} - -void ibmasm_heartbeat_exit(struct service_processor *sp) -{ - char tsbuf[32]; - - dbg("%s:%d at %s\n", __func__, __LINE__, get_timestamp(tsbuf)); - ibmasm_wait_for_response(sp->heartbeat, IBMASM_CMD_TIMEOUT_NORMAL); - dbg("%s:%d at %s\n", __func__, __LINE__, get_timestamp(tsbuf)); - suspend_heartbeats = 1; - command_put(sp->heartbeat); -} - -void ibmasm_receive_heartbeat(struct service_processor *sp, void *message, size_t size) -{ - struct command *cmd = sp->heartbeat; - struct dot_command_header *header = (struct dot_command_header *)cmd->buffer; - char tsbuf[32]; - - dbg("%s:%d at %s\n", __func__, __LINE__, get_timestamp(tsbuf)); - if (suspend_heartbeats) - return; - - /* return the received dot command to sender */ - cmd->status = IBMASM_CMD_PENDING; - size = min(size, cmd->buffer_size); - memcpy_fromio(cmd->buffer, message, size); - header->type = sp_write; - ibmasm_exec_command(sp, cmd); -} |