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[S390] pm: appldata power management callbacks 

Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Gerald Schaefer 2009-06-16 10:30:36 +02:00 committed by Martin Schwidefsky
parent 58872d5f36
commit 524dbcdad7
1 changed files with 115 additions and 4 deletions
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119
arch/s390/appldata/appldata_base.c
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@ -5,7 +5,7 @@
* Exports appldata_register_ops() and appldata_unregister_ops() for the
* data gathering modules.
*
* Copyright IBM Corp. 2003, 2008
* Copyright IBM Corp. 2003, 2009
*
* Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
*/
@ -26,6 +26,8 @@
#include <linux/notifier.h>
#include <linux/cpu.h>
#include <linux/workqueue.h>
#include <linux/suspend.h>
#include <linux/platform_device.h>
#include <asm/appldata.h>
#include <asm/timer.h>
#include <asm/uaccess.h>
@ -41,6 +43,9 @@
#define TOD_MICRO 0x01000 /* nr. of TOD clock units
for 1 microsecond */
static struct platform_device *appldata_pdev;
/*
* /proc entries (sysctl)
*/
@ -86,6 +91,7 @@ static atomic_t appldata_expire_count = ATOMIC_INIT(0);
static DEFINE_SPINLOCK(appldata_timer_lock);
static int appldata_interval = APPLDATA_CPU_INTERVAL;
static int appldata_timer_active;
static int appldata_timer_suspended = 0;
/*
* Work queue
@ -475,6 +481,93 @@ void appldata_unregister_ops(struct appldata_ops *ops)
/********************** module-ops management <END> **************************/
/**************************** suspend / resume *******************************/
static int appldata_freeze(struct device *dev)
{
struct appldata_ops *ops;
int rc;
struct list_head *lh;
get_online_cpus();
spin_lock(&appldata_timer_lock);
if (appldata_timer_active) {
__appldata_vtimer_setup(APPLDATA_DEL_TIMER);
appldata_timer_suspended = 1;
}
spin_unlock(&appldata_timer_lock);
put_online_cpus();
mutex_lock(&appldata_ops_mutex);
list_for_each(lh, &appldata_ops_list) {
ops = list_entry(lh, struct appldata_ops, list);
if (ops->active == 1) {
rc = appldata_diag(ops->record_nr, APPLDATA_STOP_REC,
(unsigned long) ops->data, ops->size,
ops->mod_lvl);
if (rc != 0)
pr_err("Stopping the data collection for %s "
"failed with rc=%d\n", ops->name, rc);
}
}
mutex_unlock(&appldata_ops_mutex);
return 0;
}
static int appldata_restore(struct device *dev)
{
struct appldata_ops *ops;
int rc;
struct list_head *lh;
get_online_cpus();
spin_lock(&appldata_timer_lock);
if (appldata_timer_suspended) {
__appldata_vtimer_setup(APPLDATA_ADD_TIMER);
appldata_timer_suspended = 0;
}
spin_unlock(&appldata_timer_lock);
put_online_cpus();
mutex_lock(&appldata_ops_mutex);
list_for_each(lh, &appldata_ops_list) {
ops = list_entry(lh, struct appldata_ops, list);
if (ops->active == 1) {
ops->callback(ops->data); // init record
rc = appldata_diag(ops->record_nr,
APPLDATA_START_INTERVAL_REC,
(unsigned long) ops->data, ops->size,
ops->mod_lvl);
if (rc != 0) {
pr_err("Starting the data collection for %s "
"failed with rc=%d\n", ops->name, rc);
}
}
}
mutex_unlock(&appldata_ops_mutex);
return 0;
}
static int appldata_thaw(struct device *dev)
{
return appldata_restore(dev);
}
static struct dev_pm_ops appldata_pm_ops = {
.freeze = appldata_freeze,
.thaw = appldata_thaw,
.restore = appldata_restore,
};
static struct platform_driver appldata_pdrv = {
.driver = {
.name = "appldata",
.owner = THIS_MODULE,
.pm = &appldata_pm_ops,
},
};
/************************* suspend / resume <END> ****************************/
/******************************* init / exit *********************************/
static void __cpuinit appldata_online_cpu(int cpu)
@ -531,11 +624,23 @@ static struct notifier_block __cpuinitdata appldata_nb = {
*/
static int __init appldata_init(void)
{
int i;
int i, rc;
rc = platform_driver_register(&appldata_pdrv);
if (rc)
return rc;
appldata_pdev = platform_device_register_simple("appldata", -1, NULL,
0);
if (IS_ERR(appldata_pdev)) {
rc = PTR_ERR(appldata_pdev);
goto out_driver;
}
appldata_wq = create_singlethread_workqueue("appldata");
if (!appldata_wq)
return -ENOMEM;
if (!appldata_wq) {
rc = -ENOMEM;
goto out_device;
}
get_online_cpus();
for_each_online_cpu(i)
@ -547,6 +652,12 @@ static int __init appldata_init(void)
appldata_sysctl_header = register_sysctl_table(appldata_dir_table);
return 0;
out_device:
platform_device_unregister(appldata_pdev);
out_driver:
platform_driver_unregister(&appldata_pdrv);
return rc;
}
__initcall(appldata_init);