/*
- * $Id: ctcmain.c,v 1.74 2005/03/24 09:04:17 mschwide Exp $
- *
* CTC / ESCON network driver
*
* Copyright (C) 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Fixes by : Jochen Röhrig (roehrig@de.ibm.com)
* Arnaldo Carvalho de Melo <acme@conectiva.com.br>
Peter Tiedemann (ptiedem@de.ibm.com)
- * Driver Model stuff by : Cornelia Huck <cohuck@de.ibm.com>
+ * Driver Model stuff by : Cornelia Huck <huckc@de.ibm.com>
*
* Documentation used:
* - Principles of Operation (IBM doc#: SA22-7201-06)
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
- * RELEASE-TAG: CTC/ESCON network driver $Revision: 1.74 $
- *
*/
-\f
#undef DEBUG
#include <linux/module.h>
#include <linux/init.h>
"TX down",
"Restart",
};
-\f
+
/**
* Events of the channel statemachine
*/
print_banner(void)
{
static int printed = 0;
- char vbuf[] = "$Revision: 1.74 $";
- char *version = vbuf;
if (printed)
return;
- if ((version = strchr(version, ':'))) {
- char *p = strchr(version + 1, '$');
- if (p)
- *p = '\0';
- } else
- version = " ??? ";
- printk(KERN_INFO "CTC driver Version%s"
-#ifdef DEBUG
- " (DEBUG-VERSION, " __DATE__ __TIME__ ")"
-#endif
- " initialized\n", version);
+
+ printk(KERN_INFO "CTC driver initialized\n");
printed = 1;
}
"Restarting",
"Not operational",
};
-\f
+
#ifdef DEBUG
/**
* Dump header and first 16 bytes of an sk_buff for debugging purposes.
fsm_action_nop(fsm_instance * fi, int event, void *arg)
{
}
-\f
+
/**
* Actions for channel - statemachines.
*****************************************************************************/
}
}
-static void
+static void
ch_action_reinit(fsm_instance *fi, int event, void *arg)
{
struct channel *ch = (struct channel *)arg;
struct net_device *dev = ch->netdev;
struct ctc_priv *privptr = dev->priv;
-
+
DBF_TEXT(trace, 4, __FUNCTION__);
ch_action_iofatal(fi, event, arg);
fsm_addtimer(&privptr->restart_timer, 1000, DEV_EVENT_RESTART, dev);
}
-\f
/**
* The statemachine for a channel.
*/
};
static const int CH_FSM_LEN = sizeof (ch_fsm) / sizeof (fsm_node);
-\f
+
/**
* Functions related to setup and device detection.
*****************************************************************************/
}
dev1 = simple_strtoul(id1, &id1, 16);
dev2 = simple_strtoul(id2, &id2, 16);
-
+
return (dev1 < dev2);
}
irb->scsw.dstat);
return;
}
-
+
priv = ((struct ccwgroup_device *)cdev->dev.driver_data)
->dev.driver_data;
"device %s\n", cdev->dev.bus_id);
return;
}
-
+
dev = (struct net_device *) (ch->netdev);
if (dev == NULL) {
ctc_pr_crit("ctc: ctc_irq_handler dev=NULL bus_id=%s, ch=0x%p\n",
fsm_event(ch->fsm, CH_EVENT_IRQ, ch);
}
-\f
+
/**
* Actions for interface - statemachine.
*****************************************************************************/
fsm_event(ch->fsm, CH_EVENT_STOP, ch);
}
}
-static void
+static void
dev_action_restart(fsm_instance *fi, int event, void *arg)
{
struct net_device *dev = (struct net_device *)arg;
struct ctc_priv *privptr = dev->priv;
-
+
DBF_TEXT(trace, 3, __FUNCTION__);
ctc_pr_debug("%s: Restarting\n", dev->name);
dev_action_stop(fi, event, arg);
int rc = 0;
DBF_TEXT(trace, 5, __FUNCTION__);
+ /* we need to acquire the lock for testing the state
+ * otherwise we can have an IRQ changing the state to
+ * TXIDLE after the test but before acquiring the lock.
+ */
+ spin_lock_irqsave(&ch->collect_lock, saveflags);
if (fsm_getstate(ch->fsm) != CH_STATE_TXIDLE) {
int l = skb->len + LL_HEADER_LENGTH;
- spin_lock_irqsave(&ch->collect_lock, saveflags);
- if (ch->collect_len + l > ch->max_bufsize - 2)
- rc = -EBUSY;
- else {
+ if (ch->collect_len + l > ch->max_bufsize - 2) {
+ spin_unlock_irqrestore(&ch->collect_lock, saveflags);
+ return -EBUSY;
+ } else {
atomic_inc(&skb->users);
header.length = l;
header.type = skb->protocol;
int ccw_idx;
struct sk_buff *nskb;
unsigned long hi;
-
+ spin_unlock_irqrestore(&ch->collect_lock, saveflags);
/**
* Protect skb against beeing free'd by upper
* layers.
if (!nskb) {
atomic_dec(&skb->users);
skb_pull(skb, LL_HEADER_LENGTH + 2);
+ ctc_clear_busy(ch->netdev);
return -ENOMEM;
} else {
memcpy(skb_put(nskb, skb->len),
*/
atomic_dec(&skb->users);
skb_pull(skb, LL_HEADER_LENGTH + 2);
+ ctc_clear_busy(ch->netdev);
return -EBUSY;
}
}
}
+ ctc_clear_busy(ch->netdev);
return rc;
}
-\f
+
/**
* Interface API for upper network layers
*****************************************************************************/
/**
* If channels are not running, try to restart them
- * and throw away packet.
+ * and throw away packet.
*/
if (fsm_getstate(privptr->fsm) != DEV_STATE_RUNNING) {
fsm_event(privptr->fsm, DEV_EVENT_START, dev);
dev->trans_start = jiffies;
if (transmit_skb(privptr->channel[WRITE], skb) != 0)
rc = 1;
- ctc_clear_busy(dev);
return rc;
}
*/
static ssize_t
-buffer_show(struct device *dev, char *buf)
+buffer_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct ctc_priv *priv;
}
static ssize_t
-buffer_write(struct device *dev, const char *buf, size_t count)
+buffer_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct ctc_priv *priv;
struct net_device *ndev;
}
static ssize_t
-loglevel_show(struct device *dev, char *buf)
+loglevel_show(struct device *dev, struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%d\n", loglevel);
}
static ssize_t
-loglevel_write(struct device *dev, const char *buf, size_t count)
+loglevel_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
int ll1;
}
static ssize_t
-stats_show(struct device *dev, char *buf)
+stats_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct ctc_priv *priv = dev->driver_data;
if (!priv)
}
static ssize_t
-stats_write(struct device *dev, const char *buf, size_t count)
+stats_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct ctc_priv *priv = dev->driver_data;
if (!priv)
return count;
}
-\f
static void
ctc_netdev_unregister(struct net_device * dev)
{
}
static ssize_t
-ctc_proto_show(struct device *dev, char *buf)
+ctc_proto_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct ctc_priv *priv;
}
static ssize_t
-ctc_proto_store(struct device *dev, const char *buf, size_t count)
+ctc_proto_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct ctc_priv *priv;
int value;
return count;
}
-
static ssize_t
-ctc_type_show(struct device *dev, char *buf)
+ctc_type_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct ccwgroup_device *cgdev;
/**
* Add ctc specific attributes.
* Add ctc private data.
- *
+ *
* @param cgdev pointer to ccwgroup_device just added
*
* @returns 0 on success, !0 on failure.
DBF_TEXT(setup, 3, buffer);
type = get_channel_type(&cgdev->cdev[0]->id);
-
+
snprintf(read_id, CTC_ID_SIZE, "ch-%s", cgdev->cdev[0]->dev.bus_id);
snprintf(write_id, CTC_ID_SIZE, "ch-%s", cgdev->cdev[1]->dev.bus_id);
channel_get(type, direction == READ ? read_id : write_id,
direction);
if (privptr->channel[direction] == NULL) {
- if (direction == WRITE)
+ if (direction == WRITE)
channel_free(privptr->channel[READ]);
ctc_free_netdevice(dev, 1);
{
struct ctc_priv *priv;
struct net_device *ndev;
-
+
DBF_TEXT(setup, 3, __FUNCTION__);
pr_debug("%s() called\n", __FUNCTION__);
git://git.onelab.eu / linux-2.6.git / blobdiff