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    Subject[patch 35/38] pm: monwriter power management callbacks.
    From: Gerald Schaefer <gerald.schaefer@de.ibm.com>

    Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
    Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
    ---
    drivers/s390/char/monwriter.c | 98 +++++++++++++++++++++++++++++++++++++++---
    1 file changed, 92 insertions(+), 6 deletions(-)

    Index: linux-2.6/drivers/s390/char/monwriter.c
    ===================================================================
    --- linux-2.6.orig/drivers/s390/char/monwriter.c
    +++ linux-2.6/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 *i
    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 *
    kfree(entry->data);
    kfree(entry);
    }
    + list_del(&monpriv->priv_list);
    kfree(monpriv);
    return 0;
    }
    @@ -281,20 +285,102 @@ static struct miscdevice mon_dev = {
    };

    /*
    + * 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);
    --
    blue skies,
    Martin.

    "Reality continues to ruin my life." - Calvin.



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