diff options
Diffstat (limited to 'drivers/s390/net/netiucv.c')
| -rw-r--r-- | drivers/s390/net/netiucv.c | 119 |
1 files changed, 111 insertions, 8 deletions
diff --git a/drivers/s390/net/netiucv.c b/drivers/s390/net/netiucv.c index be716e45f7ac..fdb02d043d3e 100644 --- a/drivers/s390/net/netiucv.c +++ b/drivers/s390/net/netiucv.c @@ -1,11 +1,15 @@ /* * IUCV network driver * - * Copyright 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation - * Author(s): Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com) + * Copyright IBM Corp. 2001, 2009 * - * Sysfs integration and all bugs therein by Cornelia Huck - * (cornelia.huck@de.ibm.com) + * Author(s): + * Original netiucv driver: + * Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com) + * Sysfs integration and all bugs therein: + * Cornelia Huck (cornelia.huck@de.ibm.com) + * PM functions: + * Ursula Braun (ursula.braun@de.ibm.com) * * Documentation used: * the source of the original IUCV driver by: @@ -149,10 +153,27 @@ PRINT_##importance(header "%02x %02x %02x %02x %02x %02x %02x %02x " \ #define PRINTK_HEADER " iucv: " /* for debugging */ +/* dummy device to make sure netiucv_pm functions are called */ +static struct device *netiucv_dev; + +static int netiucv_pm_prepare(struct device *); +static void netiucv_pm_complete(struct device *); +static int netiucv_pm_freeze(struct device *); +static int netiucv_pm_restore_thaw(struct device *); + +static struct dev_pm_ops netiucv_pm_ops = { + .prepare = netiucv_pm_prepare, + .complete = netiucv_pm_complete, + .freeze = netiucv_pm_freeze, + .thaw = netiucv_pm_restore_thaw, + .restore = netiucv_pm_restore_thaw, +}; + static struct device_driver netiucv_driver = { .owner = THIS_MODULE, .name = "netiucv", .bus = &iucv_bus, + .pm = &netiucv_pm_ops, }; static int netiucv_callback_connreq(struct iucv_path *, @@ -233,6 +254,7 @@ struct netiucv_priv { fsm_instance *fsm; struct iucv_connection *conn; struct device *dev; + int pm_state; }; /** @@ -1265,6 +1287,72 @@ static int netiucv_close(struct net_device *dev) return 0; } +static int netiucv_pm_prepare(struct device *dev) +{ + IUCV_DBF_TEXT(trace, 3, __func__); + return 0; +} + +static void netiucv_pm_complete(struct device *dev) +{ + IUCV_DBF_TEXT(trace, 3, __func__); + return; +} + +/** + * netiucv_pm_freeze() - Freeze PM callback + * @dev: netiucv device + * + * close open netiucv interfaces + */ +static int netiucv_pm_freeze(struct device *dev) +{ + struct netiucv_priv *priv = dev->driver_data; + struct net_device *ndev = NULL; + int rc = 0; + + IUCV_DBF_TEXT(trace, 3, __func__); + if (priv && priv->conn) + ndev = priv->conn->netdev; + if (!ndev) + goto out; + netif_device_detach(ndev); + priv->pm_state = fsm_getstate(priv->fsm); + rc = netiucv_close(ndev); +out: + return rc; +} + +/** + * netiucv_pm_restore_thaw() - Thaw and restore PM callback + * @dev: netiucv device + * + * re-open netiucv interfaces closed during freeze + */ +static int netiucv_pm_restore_thaw(struct device *dev) +{ + struct netiucv_priv *priv = dev->driver_data; + struct net_device *ndev = NULL; + int rc = 0; + + IUCV_DBF_TEXT(trace, 3, __func__); + if (priv && priv->conn) + ndev = priv->conn->netdev; + if (!ndev) + goto out; + switch (priv->pm_state) { + case DEV_STATE_RUNNING: + case DEV_STATE_STARTWAIT: + rc = netiucv_open(ndev); + break; + default: + break; + } + netif_device_attach(ndev); +out: + return rc; +} + /** * Start transmission of a packet. * Called from generic network device layer. @@ -1315,9 +1403,9 @@ static int netiucv_tx(struct sk_buff *skb, struct net_device *dev) return NETDEV_TX_BUSY; } dev->trans_start = jiffies; - rc = netiucv_transmit_skb(privptr->conn, skb) != 0; + rc = netiucv_transmit_skb(privptr->conn, skb); netiucv_clear_busy(dev); - return rc; + return rc ? NETDEV_TX_BUSY : NETDEV_TX_OK; } /** @@ -1731,7 +1819,6 @@ static int netiucv_register_device(struct net_device *ndev) struct device *dev = kzalloc(sizeof(struct device), GFP_KERNEL); int ret; - IUCV_DBF_TEXT(trace, 3, __func__); if (dev) { @@ -2100,6 +2187,7 @@ static void __exit netiucv_exit(void) netiucv_unregister_device(dev); } + device_unregister(netiucv_dev); driver_unregister(&netiucv_driver); iucv_unregister(&netiucv_handler, 1); iucv_unregister_dbf_views(); @@ -2125,10 +2213,25 @@ static int __init netiucv_init(void) IUCV_DBF_TEXT_(setup, 2, "ret %d from driver_register\n", rc); goto out_iucv; } - + /* establish dummy device */ + netiucv_dev = kzalloc(sizeof(struct device), GFP_KERNEL); + if (!netiucv_dev) { + rc = -ENOMEM; + goto out_driver; + } + dev_set_name(netiucv_dev, "netiucv"); + netiucv_dev->bus = &iucv_bus; + netiucv_dev->parent = iucv_root; + netiucv_dev->release = (void (*)(struct device *))kfree; + netiucv_dev->driver = &netiucv_driver; + rc = device_register(netiucv_dev); + if (rc) + goto out_driver; netiucv_banner(); return rc; +out_driver: + driver_unregister(&netiucv_driver); out_iucv: iucv_unregister(&netiucv_handler, 1); out_dbf: |