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Diffstat (limited to 'arch/ia64/sn/kernel/xpc_main.c')
-rw-r--r--arch/ia64/sn/kernel/xpc_main.c102
1 files changed, 102 insertions, 0 deletions
diff --git a/arch/ia64/sn/kernel/xpc_main.c b/arch/ia64/sn/kernel/xpc_main.c
index cece3c7c69be..b617236524c6 100644
--- a/arch/ia64/sn/kernel/xpc_main.c
+++ b/arch/ia64/sn/kernel/xpc_main.c
@@ -57,6 +57,7 @@
#include <linux/reboot.h>
#include <asm/sn/intr.h>
#include <asm/sn/sn_sal.h>
+#include <asm/kdebug.h>
#include <asm/uaccess.h>
#include "xpc.h"
@@ -188,6 +189,11 @@ static struct notifier_block xpc_reboot_notifier = {
.notifier_call = xpc_system_reboot,
};
+static int xpc_system_die(struct notifier_block *, unsigned long, void *);
+static struct notifier_block xpc_die_notifier = {
+ .notifier_call = xpc_system_die,
+};
+
/*
* Timer function to enforce the timelimit on the partition disengage request.
@@ -997,6 +1003,9 @@ xpc_do_exit(enum xpc_retval reason)
/* take ourselves off of the reboot_notifier_list */
(void) unregister_reboot_notifier(&xpc_reboot_notifier);
+ /* take ourselves off of the die_notifier list */
+ (void) unregister_die_notifier(&xpc_die_notifier);
+
/* close down protections for IPI operations */
xpc_restrict_IPI_ops();
@@ -1011,6 +1020,63 @@ xpc_do_exit(enum xpc_retval reason)
/*
+ * Called when the system is about to be either restarted or halted.
+ */
+static void
+xpc_die_disengage(void)
+{
+ struct xpc_partition *part;
+ partid_t partid;
+ unsigned long engaged;
+ long time, print_time, disengage_request_timeout;
+
+
+ /* keep xpc_hb_checker thread from doing anything (just in case) */
+ xpc_exiting = 1;
+
+ xpc_vars->heartbeating_to_mask = 0; /* indicate we're deactivated */
+
+ for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
+ part = &xpc_partitions[partid];
+
+ if (!XPC_SUPPORTS_DISENGAGE_REQUEST(part->
+ remote_vars_version)) {
+
+ /* just in case it was left set by an earlier XPC */
+ xpc_clear_partition_engaged(1UL << partid);
+ continue;
+ }
+
+ if (xpc_partition_engaged(1UL << partid) ||
+ part->act_state != XPC_P_INACTIVE) {
+ xpc_request_partition_disengage(part);
+ xpc_mark_partition_disengaged(part);
+ xpc_IPI_send_disengage(part);
+ }
+ }
+
+ print_time = rtc_time();
+ disengage_request_timeout = print_time +
+ (xpc_disengage_request_timelimit * sn_rtc_cycles_per_second);
+
+ /* wait for all other partitions to disengage from us */
+
+ while ((engaged = xpc_partition_engaged(-1UL)) &&
+ (time = rtc_time()) < disengage_request_timeout) {
+
+ if (time >= print_time) {
+ dev_info(xpc_part, "waiting for remote partitions to "
+ "disengage, engaged=0x%lx\n", engaged);
+ print_time = time + (XPC_DISENGAGE_PRINTMSG_INTERVAL *
+ sn_rtc_cycles_per_second);
+ }
+ }
+ dev_info(xpc_part, "finished waiting for remote partitions to "
+ "disengage, engaged=0x%lx\n", engaged);
+}
+
+
+/*
* This function is called when the system is being rebooted.
*/
static int
@@ -1038,6 +1104,33 @@ xpc_system_reboot(struct notifier_block *nb, unsigned long event, void *unused)
}
+/*
+ * This function is called when the system is being rebooted.
+ */
+static int
+xpc_system_die(struct notifier_block *nb, unsigned long event, void *unused)
+{
+ switch (event) {
+ case DIE_MACHINE_RESTART:
+ case DIE_MACHINE_HALT:
+ xpc_die_disengage();
+ break;
+ case DIE_MCA_MONARCH_ENTER:
+ case DIE_INIT_MONARCH_ENTER:
+ xpc_vars->heartbeat++;
+ xpc_vars->heartbeat_offline = 1;
+ break;
+ case DIE_MCA_MONARCH_LEAVE:
+ case DIE_INIT_MONARCH_LEAVE:
+ xpc_vars->heartbeat++;
+ xpc_vars->heartbeat_offline = 0;
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+
int __init
xpc_init(void)
{
@@ -1154,6 +1247,12 @@ xpc_init(void)
dev_warn(xpc_part, "can't register reboot notifier\n");
}
+ /* add ourselves to the die_notifier list (i.e., ia64die_chain) */
+ ret = register_die_notifier(&xpc_die_notifier);
+ if (ret != 0) {
+ dev_warn(xpc_part, "can't register die notifier\n");
+ }
+
/*
* Set the beating to other partitions into motion. This is
@@ -1179,6 +1278,9 @@ xpc_init(void)
/* take ourselves off of the reboot_notifier_list */
(void) unregister_reboot_notifier(&xpc_reboot_notifier);
+ /* take ourselves off of the die_notifier list */
+ (void) unregister_die_notifier(&xpc_die_notifier);
+
del_timer_sync(&xpc_hb_timer);
free_irq(SGI_XPC_ACTIVATE, NULL);
xpc_restrict_IPI_ops();