[S390] pm: monwriter power management callbacks.

Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/char/monwriter.c b/drivers/s390/char/monwriter.c
index c7d7483..66fb8eb 100644 (file)
--- a/drivers/s390/char/monwriter.c
+++ b/drivers/s390/char/monwriter.c
@@ -1,9 +1,7 @@
 /*
- * drivers/s390/char/monwriter.c
- *
  * Character device driver for writing z/VM *MONITOR service records.
  *
- * Copyright (C) IBM Corp. 2006
+ * Copyright IBM Corp. 2006, 2009
  *
  * Author(s): Melissa Howland <Melissa.Howland@us.ibm.com>
  */
@@ -22,6 +20,7 @@
 #include <linux/ctype.h>
 #include <linux/poll.h>
 #include <linux/mutex.h>
+#include <linux/platform_device.h>
 #include <asm/uaccess.h>
 #include <asm/ebcdic.h>
 #include <asm/io.h>
@@ -40,7 +39,10 @@ struct mon_buf {
        char *data;
 };
 
+static LIST_HEAD(mon_priv_list);
+
 struct mon_private {
+       struct list_head priv_list;
        struct list_head list;
        struct monwrite_hdr hdr;
        size_t hdr_to_read;
@@ -188,6 +190,7 @@ static int monwrite_open(struct inode *inode, struct file *filp)
        monpriv->hdr_to_read = sizeof(monpriv->hdr);
        mutex_init(&monpriv->thread_mutex);
        filp->private_data = monpriv;
+       list_add_tail(&monpriv->priv_list, &mon_priv_list);
        unlock_kernel();
        return nonseekable_open(inode, filp);
 }
@@ -206,6 +209,7 @@ static int monwrite_close(struct inode *inode, struct file *filp)
                kfree(entry->data);
                kfree(entry);
        }
+       list_del(&monpriv->priv_list);
        kfree(monpriv);
        return 0;
 }
@@ -280,21 +284,103 @@ static struct miscdevice mon_dev = {
        .minor  = MISC_DYNAMIC_MINOR,
 };
 
+/*
+ * suspend/resume
+ */
+
+static int monwriter_freeze(struct device *dev)
+{
+       struct mon_private *monpriv;
+       struct mon_buf *monbuf;
+
+       list_for_each_entry(monpriv, &mon_priv_list, priv_list) {
+               list_for_each_entry(monbuf, &monpriv->list, list) {
+                       if (monbuf->hdr.mon_function != MONWRITE_GEN_EVENT)
+                               monwrite_diag(&monbuf->hdr, monbuf->data,
+                                             APPLDATA_STOP_REC);
+               }
+       }
+       return 0;
+}
+
+static int monwriter_restore(struct device *dev)
+{
+       struct mon_private *monpriv;
+       struct mon_buf *monbuf;
+
+       list_for_each_entry(monpriv, &mon_priv_list, priv_list) {
+               list_for_each_entry(monbuf, &monpriv->list, list) {
+                       if (monbuf->hdr.mon_function == MONWRITE_START_INTERVAL)
+                               monwrite_diag(&monbuf->hdr, monbuf->data,
+                                             APPLDATA_START_INTERVAL_REC);
+                       if (monbuf->hdr.mon_function == MONWRITE_START_CONFIG)
+                               monwrite_diag(&monbuf->hdr, monbuf->data,
+                                             APPLDATA_START_CONFIG_REC);
+               }
+       }
+       return 0;
+}
+
+static int monwriter_thaw(struct device *dev)
+{
+       return monwriter_restore(dev);
+}
+
+static struct dev_pm_ops monwriter_pm_ops = {
+       .freeze         = monwriter_freeze,
+       .thaw           = monwriter_thaw,
+       .restore        = monwriter_restore,
+};
+
+static struct platform_driver monwriter_pdrv = {
+       .driver = {
+               .name   = "monwriter",
+               .owner  = THIS_MODULE,
+               .pm     = &monwriter_pm_ops,
+       },
+};
+
+static struct platform_device *monwriter_pdev;
+
 /*
  * module init/exit
  */
 
 static int __init mon_init(void)
 {
-       if (MACHINE_IS_VM)
-               return misc_register(&mon_dev);
-       else
+       int rc;
+
+       if (!MACHINE_IS_VM)
                return -ENODEV;
+
+       rc = platform_driver_register(&monwriter_pdrv);
+       if (rc)
+               return rc;
+
+       monwriter_pdev = platform_device_register_simple("monwriter", -1, NULL,
+                                                       0);
+       if (IS_ERR(monwriter_pdev)) {
+               rc = PTR_ERR(monwriter_pdev);
+               goto out_driver;
+       }
+
+       rc = misc_register(&mon_dev);
+       if (rc)
+               goto out_device;
+       return 0;
+
+out_device:
+       platform_device_unregister(monwriter_pdev);
+out_driver:
+       platform_driver_unregister(&monwriter_pdrv);
+       return rc;
 }
 
 static void __exit mon_exit(void)
 {
        WARN_ON(misc_deregister(&mon_dev) != 0);
+       platform_device_unregister(monwriter_pdev);
+       platform_driver_unregister(&monwriter_pdrv);
 }
 
 module_init(mon_init);