[patch 5/10] s390: ctc code cleanup
From: Frank Pavlic
Date: Fri May 27 2005 - 04:22:20 EST
[patch 5/10] s390: ctc code cleanup.
From: Peter Tiedemann <ptiedem@xxxxxxxxxx>
ctc network driver changes:
- Some code cleanup.
Signed-off-by: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
diffstat:
drivers/s390/net/ctcdbug.h | 12
drivers/s390/net/ctcmain.c | 616 +++++++++++++++------------------------------
drivers/s390/net/ctcmain.h | 276 ++++++++++++++++++++
3 files changed, 490 insertions(+), 414 deletions(-)
diff -urpN linux-2.6/drivers/s390/net/ctcdbug.h linux-2.6-patched/drivers/s390/net/ctcdbug.h
--- linux-2.6/drivers/s390/net/ctcdbug.h 2005-03-02 08:38:07.000000000 +0100
+++ linux-2.6-patched/drivers/s390/net/ctcdbug.h 2005-05-06 11:26:19.000000000 +0200
@@ -1,6 +1,6 @@
/*
*
- * linux/drivers/s390/net/ctcdbug.h ($Revision: 1.4 $)
+ * linux/drivers/s390/net/ctcdbug.h ($Revision: 1.5 $)
*
* CTC / ESCON network driver - s390 dbf exploit.
*
@@ -9,7 +9,7 @@
* Author(s): Original Code written by
* Peter Tiedemann (ptiedem@xxxxxxxxxx)
*
- * $Revision: 1.4 $ $Date: 2004/10/15 09:26:58 $
+ * $Revision: 1.5 $ $Date: 2005/02/27 19:46:44 $
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -25,9 +25,11 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-
+#ifndef _CTCDBUG_H_
+#define _CTCDBUG_H_
#include <asm/debug.h>
+#include "ctcmain.h"
/**
* Debug Facility stuff
*/
@@ -41,7 +43,7 @@
#define CTC_DBF_DATA_LEN 128
#define CTC_DBF_DATA_INDEX 3
#define CTC_DBF_DATA_NR_AREAS 1
-#define CTC_DBF_DATA_LEVEL 2
+#define CTC_DBF_DATA_LEVEL 3
#define CTC_DBF_TRACE_NAME "ctc_trace"
#define CTC_DBF_TRACE_LEN 16
@@ -121,3 +123,5 @@ hex_dump(unsigned char *buf, size_t len)
printk("\n");
}
+
+#endif
diff -urpN linux-2.6/drivers/s390/net/ctcmain.c linux-2.6-patched/drivers/s390/net/ctcmain.c
--- linux-2.6/drivers/s390/net/ctcmain.c 2005-05-06 11:25:57.000000000 +0200
+++ linux-2.6-patched/drivers/s390/net/ctcmain.c 2005-05-06 11:26:19.000000000 +0200
@@ -1,5 +1,5 @@
/*
- * $Id: ctcmain.c,v 1.72 2005/03/17 10:51:52 ptiedem Exp $
+ * $Id: ctcmain.c,v 1.74 2005/03/24 09:04:17 mschwide Exp $
*
* CTC / ESCON network driver
*
@@ -37,12 +37,11 @@
* 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: 1.72 $
+ * RELEASE-TAG: CTC/ESCON network driver $Revision: 1.74 $
*
*/
#undef DEBUG
-
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
@@ -74,288 +73,13 @@
#include "ctctty.h"
#include "fsm.h"
#include "cu3088.h"
+
#include "ctcdbug.h"
+#include "ctcmain.h"
MODULE_AUTHOR("(C) 2000 IBM Corp. by Fritz Elfert (felfert@xxxxxxxxxxxx)");
MODULE_DESCRIPTION("Linux for S/390 CTC/Escon Driver");
MODULE_LICENSE("GPL");
-
-/**
- * CCW commands, used in this driver.
- */
-#define CCW_CMD_WRITE 0x01
-#define CCW_CMD_READ 0x02
-#define CCW_CMD_SET_EXTENDED 0xc3
-#define CCW_CMD_PREPARE 0xe3
-
-#define CTC_PROTO_S390 0
-#define CTC_PROTO_LINUX 1
-#define CTC_PROTO_LINUX_TTY 2
-#define CTC_PROTO_OS390 3
-#define CTC_PROTO_MAX 3
-
-#define CTC_BUFSIZE_LIMIT 65535
-#define CTC_BUFSIZE_DEFAULT 32768
-
-#define CTC_TIMEOUT_5SEC 5000
-
-#define CTC_INITIAL_BLOCKLEN 2
-
-#define READ 0
-#define WRITE 1
-
-#define CTC_ID_SIZE BUS_ID_SIZE+3
-
-
-struct ctc_profile {
- unsigned long maxmulti;
- unsigned long maxcqueue;
- unsigned long doios_single;
- unsigned long doios_multi;
- unsigned long txlen;
- unsigned long tx_time;
- struct timespec send_stamp;
-};
-
-/**
- * Definition of one channel
- */
-struct channel {
-
- /**
- * Pointer to next channel in list.
- */
- struct channel *next;
- char id[CTC_ID_SIZE];
- struct ccw_device *cdev;
-
- /**
- * Type of this channel.
- * CTC/A or Escon for valid channels.
- */
- enum channel_types type;
-
- /**
- * Misc. flags. See CHANNEL_FLAGS_... below
- */
- __u32 flags;
-
- /**
- * The protocol of this channel
- */
- __u16 protocol;
-
- /**
- * I/O and irq related stuff
- */
- struct ccw1 *ccw;
- struct irb *irb;
-
- /**
- * RX/TX buffer size
- */
- int max_bufsize;
-
- /**
- * Transmit/Receive buffer.
- */
- struct sk_buff *trans_skb;
-
- /**
- * Universal I/O queue.
- */
- struct sk_buff_head io_queue;
-
- /**
- * TX queue for collecting skb's during busy.
- */
- struct sk_buff_head collect_queue;
-
- /**
- * Amount of data in collect_queue.
- */
- int collect_len;
-
- /**
- * spinlock for collect_queue and collect_len
- */
- spinlock_t collect_lock;
-
- /**
- * Timer for detecting unresposive
- * I/O operations.
- */
- fsm_timer timer;
-
- /**
- * Retry counter for misc. operations.
- */
- int retry;
-
- /**
- * The finite state machine of this channel
- */
- fsm_instance *fsm;
-
- /**
- * The corresponding net_device this channel
- * belongs to.
- */
- struct net_device *netdev;
-
- struct ctc_profile prof;
-
- unsigned char *trans_skb_data;
-
- __u16 logflags;
-};
-
-#define CHANNEL_FLAGS_READ 0
-#define CHANNEL_FLAGS_WRITE 1
-#define CHANNEL_FLAGS_INUSE 2
-#define CHANNEL_FLAGS_BUFSIZE_CHANGED 4
-#define CHANNEL_FLAGS_FAILED 8
-#define CHANNEL_FLAGS_WAITIRQ 16
-#define CHANNEL_FLAGS_RWMASK 1
-#define CHANNEL_DIRECTION(f) (f & CHANNEL_FLAGS_RWMASK)
-
-#define LOG_FLAG_ILLEGALPKT 1
-#define LOG_FLAG_ILLEGALSIZE 2
-#define LOG_FLAG_OVERRUN 4
-#define LOG_FLAG_NOMEM 8
-
-#define CTC_LOGLEVEL_INFO 1
-#define CTC_LOGLEVEL_NOTICE 2
-#define CTC_LOGLEVEL_WARN 4
-#define CTC_LOGLEVEL_EMERG 8
-#define CTC_LOGLEVEL_ERR 16
-#define CTC_LOGLEVEL_DEBUG 32
-#define CTC_LOGLEVEL_CRIT 64
-
-#define CTC_LOGLEVEL_DEFAULT \
-(CTC_LOGLEVEL_INFO | CTC_LOGLEVEL_NOTICE | CTC_LOGLEVEL_WARN | CTC_LOGLEVEL_CRIT)
-
-#define CTC_LOGLEVEL_MAX ((CTC_LOGLEVEL_CRIT<<1)-1)
-
-static int loglevel = CTC_LOGLEVEL_DEFAULT;
-
-#define ctc_pr_debug(fmt, arg...) \
-do { if (loglevel & CTC_LOGLEVEL_DEBUG) printk(KERN_DEBUG fmt,##arg); } while (0)
-
-#define ctc_pr_info(fmt, arg...) \
-do { if (loglevel & CTC_LOGLEVEL_INFO) printk(KERN_INFO fmt,##arg); } while (0)
-
-#define ctc_pr_notice(fmt, arg...) \
-do { if (loglevel & CTC_LOGLEVEL_NOTICE) printk(KERN_NOTICE fmt,##arg); } while (0)
-
-#define ctc_pr_warn(fmt, arg...) \
-do { if (loglevel & CTC_LOGLEVEL_WARN) printk(KERN_WARNING fmt,##arg); } while (0)
-
-#define ctc_pr_emerg(fmt, arg...) \
-do { if (loglevel & CTC_LOGLEVEL_EMERG) printk(KERN_EMERG fmt,##arg); } while (0)
-
-#define ctc_pr_err(fmt, arg...) \
-do { if (loglevel & CTC_LOGLEVEL_ERR) printk(KERN_ERR fmt,##arg); } while (0)
-
-#define ctc_pr_crit(fmt, arg...) \
-do { if (loglevel & CTC_LOGLEVEL_CRIT) printk(KERN_CRIT fmt,##arg); } while (0)
-
-/**
- * Linked list of all detected channels.
- */
-static struct channel *channels = NULL;
-
-struct ctc_priv {
- struct net_device_stats stats;
- unsigned long tbusy;
- /**
- * The finite state machine of this interface.
- */
- fsm_instance *fsm;
- /**
- * The protocol of this device
- */
- __u16 protocol;
- /**
- * Timer for restarting after I/O Errors
- */
- fsm_timer restart_timer;
-
- int buffer_size;
-
- struct channel *channel[2];
-};
-
-/**
- * Definition of our link level header.
- */
-struct ll_header {
- __u16 length;
- __u16 type;
- __u16 unused;
-};
-#define LL_HEADER_LENGTH (sizeof(struct ll_header))
-
-/**
- * Compatibility macros for busy handling
- * of network devices.
- */
-static __inline__ void
-ctc_clear_busy(struct net_device * dev)
-{
- clear_bit(0, &(((struct ctc_priv *) dev->priv)->tbusy));
- if (((struct ctc_priv *)dev->priv)->protocol != CTC_PROTO_LINUX_TTY)
- netif_wake_queue(dev);
-}
-
-static __inline__ int
-ctc_test_and_set_busy(struct net_device * dev)
-{
- if (((struct ctc_priv *)dev->priv)->protocol != CTC_PROTO_LINUX_TTY)
- netif_stop_queue(dev);
- return test_and_set_bit(0, &((struct ctc_priv *) dev->priv)->tbusy);
-}
-
-/**
- * Print Banner.
- */
-static void
-print_banner(void)
-{
- static int printed = 0;
- char vbuf[] = "$Revision: 1.72 $";
- char *version = vbuf;
-
- if (printed)
- return;
- if ((version = strchr(version, ':'))) {
- char *p = strchr(version + 1, '$');
- if (p)
- *p = '\0';
- } else
- version = " ??? ";
- printk(KERN_INFO "CTC driver Version%s"
-#ifdef DEBUG
- " (DEBUG-VERSION, " __DATE__ __TIME__ ")"
-#endif
- " initialized\n", version);
- printed = 1;
-}
-
-/**
- * Return type of a detected device.
- */
-static enum channel_types
-get_channel_type(struct ccw_device_id *id)
-{
- enum channel_types type = (enum channel_types) id->driver_info;
-
- if (type == channel_type_ficon)
- type = channel_type_escon;
-
- return type;
-}
-
/**
* States of the interface statemachine.
*/
@@ -371,7 +95,7 @@ enum dev_states {
/**
* MUST be always the last element!!
*/
- NR_DEV_STATES
+ CTC_NR_DEV_STATES
};
static const char *dev_state_names[] = {
@@ -399,7 +123,7 @@ enum dev_events {
/**
* MUST be always the last element!!
*/
- NR_DEV_EVENTS
+ CTC_NR_DEV_EVENTS
};
static const char *dev_event_names[] = {
@@ -476,40 +200,6 @@ enum ch_events {
NR_CH_EVENTS,
};
-static const char *ch_event_names[] = {
- "ccw_device success",
- "ccw_device busy",
- "ccw_device enodev",
- "ccw_device ioerr",
- "ccw_device unknown",
-
- "Status ATTN & BUSY",
- "Status ATTN",
- "Status BUSY",
-
- "Unit check remote reset",
- "Unit check remote system reset",
- "Unit check TX timeout",
- "Unit check TX parity",
- "Unit check Hardware failure",
- "Unit check RX parity",
- "Unit check ZERO",
- "Unit check Unknown",
-
- "SubChannel check Unknown",
-
- "Machine check failure",
- "Machine check operational",
-
- "IRQ normal",
- "IRQ final",
-
- "Timer",
-
- "Start",
- "Stop",
-};
-
/**
* States of the channel statemachine.
*/
@@ -545,6 +235,87 @@ enum ch_states {
NR_CH_STATES,
};
+static int loglevel = CTC_LOGLEVEL_DEFAULT;
+
+/**
+ * Linked list of all detected channels.
+ */
+static struct channel *channels = NULL;
+
+/**
+ * Print Banner.
+ */
+static void
+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);
+ printed = 1;
+}
+
+/**
+ * Return type of a detected device.
+ */
+static enum channel_types
+get_channel_type(struct ccw_device_id *id)
+{
+ enum channel_types type = (enum channel_types) id->driver_info;
+
+ if (type == channel_type_ficon)
+ type = channel_type_escon;
+
+ return type;
+}
+
+static const char *ch_event_names[] = {
+ "ccw_device success",
+ "ccw_device busy",
+ "ccw_device enodev",
+ "ccw_device ioerr",
+ "ccw_device unknown",
+
+ "Status ATTN & BUSY",
+ "Status ATTN",
+ "Status BUSY",
+
+ "Unit check remote reset",
+ "Unit check remote system reset",
+ "Unit check TX timeout",
+ "Unit check TX parity",
+ "Unit check Hardware failure",
+ "Unit check RX parity",
+ "Unit check ZERO",
+ "Unit check Unknown",
+
+ "SubChannel check Unknown",
+
+ "Machine check failure",
+ "Machine check operational",
+
+ "IRQ normal",
+ "IRQ final",
+
+ "Timer",
+
+ "Start",
+ "Stop",
+};
+
static const char *ch_state_names[] = {
"Idle",
"Stopped",
@@ -1934,7 +1705,6 @@ add_channel(struct ccw_device *cdev, enu
ch->cdev = cdev;
snprintf(ch->id, CTC_ID_SIZE, "ch-%s", cdev->dev.bus_id);
ch->type = type;
- loglevel = CTC_LOGLEVEL_DEFAULT;
ch->fsm = init_fsm(ch->id, ch_state_names,
ch_event_names, NR_CH_STATES, NR_CH_EVENTS,
ch_fsm, CH_FSM_LEN, GFP_KERNEL);
@@ -2697,6 +2467,7 @@ ctc_stats(struct net_device * dev)
/*
* sysfs attributes
*/
+
static ssize_t
buffer_show(struct device *dev, char *buf)
{
@@ -2715,57 +2486,61 @@ buffer_write(struct device *dev, const c
struct ctc_priv *priv;
struct net_device *ndev;
int bs1;
+ char buffer[16];
DBF_TEXT(trace, 3, __FUNCTION__);
+ DBF_TEXT(trace, 3, buf);
priv = dev->driver_data;
- if (!priv)
+ if (!priv) {
+ DBF_TEXT(trace, 3, "bfnopriv");
return -ENODEV;
+ }
+
+ sscanf(buf, "%u", &bs1);
+ if (bs1 > CTC_BUFSIZE_LIMIT)
+ goto einval;
+ if (bs1 < (576 + LL_HEADER_LENGTH + 2))
+ goto einval;
+ priv->buffer_size = bs1; // just to overwrite the default
+
ndev = priv->channel[READ]->netdev;
- if (!ndev)
+ if (!ndev) {
+ DBF_TEXT(trace, 3, "bfnondev");
return -ENODEV;
- sscanf(buf, "%u", &bs1);
+ }
- if (bs1 > CTC_BUFSIZE_LIMIT)
- return -EINVAL;
if ((ndev->flags & IFF_RUNNING) &&
(bs1 < (ndev->mtu + LL_HEADER_LENGTH + 2)))
- return -EINVAL;
- if (bs1 < (576 + LL_HEADER_LENGTH + 2))
- return -EINVAL;
+ goto einval;
- priv->buffer_size = bs1;
- priv->channel[READ]->max_bufsize =
- priv->channel[WRITE]->max_bufsize = bs1;
+ priv->channel[READ]->max_bufsize = bs1;
+ priv->channel[WRITE]->max_bufsize = bs1;
if (!(ndev->flags & IFF_RUNNING))
ndev->mtu = bs1 - LL_HEADER_LENGTH - 2;
priv->channel[READ]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
priv->channel[WRITE]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
+ sprintf(buffer, "%d",priv->buffer_size);
+ DBF_TEXT(trace, 3, buffer);
return count;
+einval:
+ DBF_TEXT(trace, 3, "buff_err");
+ return -EINVAL;
}
static ssize_t
loglevel_show(struct device *dev, char *buf)
{
- struct ctc_priv *priv;
-
- priv = dev->driver_data;
- if (!priv)
- return -ENODEV;
return sprintf(buf, "%d\n", loglevel);
}
static ssize_t
loglevel_write(struct device *dev, const char *buf, size_t count)
{
- struct ctc_priv *priv;
int ll1;
DBF_TEXT(trace, 5, __FUNCTION__);
- priv = dev->driver_data;
- if (!priv)
- return -ENODEV;
sscanf(buf, "%i", &ll1);
if ((ll1 > CTC_LOGLEVEL_MAX) || (ll1 < 0))
@@ -2835,27 +2610,6 @@ stats_write(struct device *dev, const ch
return count;
}
-static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write);
-static DEVICE_ATTR(loglevel, 0644, loglevel_show, loglevel_write);
-static DEVICE_ATTR(stats, 0644, stats_show, stats_write);
-
-static int
-ctc_add_attributes(struct device *dev)
-{
-// device_create_file(dev, &dev_attr_buffer);
- device_create_file(dev, &dev_attr_loglevel);
- device_create_file(dev, &dev_attr_stats);
- return 0;
-}
-
-static void
-ctc_remove_attributes(struct device *dev)
-{
- device_remove_file(dev, &dev_attr_stats);
- device_remove_file(dev, &dev_attr_loglevel);
-// device_remove_file(dev, &dev_attr_buffer);
-}
-
static void
ctc_netdev_unregister(struct net_device * dev)
@@ -2899,52 +2653,6 @@ ctc_free_netdevice(struct net_device * d
#endif
}
-/**
- * Initialize everything of the net device except the name and the
- * channel structs.
- */
-static struct net_device *
-ctc_init_netdevice(struct net_device * dev, int alloc_device,
- struct ctc_priv *privptr)
-{
- if (!privptr)
- return NULL;
-
- DBF_TEXT(setup, 3, __FUNCTION__);
- if (alloc_device) {
- dev = kmalloc(sizeof (struct net_device), GFP_KERNEL);
- if (!dev)
- return NULL;
- memset(dev, 0, sizeof (struct net_device));
- }
-
- dev->priv = privptr;
- privptr->fsm = init_fsm("ctcdev", dev_state_names,
- dev_event_names, NR_DEV_STATES, NR_DEV_EVENTS,
- dev_fsm, DEV_FSM_LEN, GFP_KERNEL);
- if (privptr->fsm == NULL) {
- if (alloc_device)
- kfree(dev);
- return NULL;
- }
- fsm_newstate(privptr->fsm, DEV_STATE_STOPPED);
- fsm_settimer(privptr->fsm, &privptr->restart_timer);
- if (dev->mtu == 0)
- dev->mtu = CTC_BUFSIZE_DEFAULT - LL_HEADER_LENGTH - 2;
- dev->hard_start_xmit = ctc_tx;
- dev->open = ctc_open;
- dev->stop = ctc_close;
- dev->get_stats = ctc_stats;
- dev->change_mtu = ctc_change_mtu;
- dev->hard_header_len = LL_HEADER_LENGTH + 2;
- dev->addr_len = 0;
- dev->type = ARPHRD_SLIP;
- dev->tx_queue_len = 100;
- dev->flags = IFF_POINTOPOINT | IFF_NOARP;
- SET_MODULE_OWNER(dev);
- return dev;
-}
-
static ssize_t
ctc_proto_show(struct device *dev, char *buf)
{
@@ -2977,7 +2685,6 @@ ctc_proto_store(struct device *dev, cons
return count;
}
-static DEVICE_ATTR(protocol, 0644, ctc_proto_show, ctc_proto_store);
static ssize_t
ctc_type_show(struct device *dev, char *buf)
@@ -2991,8 +2698,13 @@ ctc_type_show(struct device *dev, char *
return sprintf(buf, "%s\n", cu3088_type[cgdev->cdev[0]->id.driver_info]);
}
+static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write);
+static DEVICE_ATTR(protocol, 0644, ctc_proto_show, ctc_proto_store);
static DEVICE_ATTR(type, 0444, ctc_type_show, NULL);
+static DEVICE_ATTR(loglevel, 0644, loglevel_show, loglevel_write);
+static DEVICE_ATTR(stats, 0644, stats_show, stats_write);
+
static struct attribute *ctc_attr[] = {
&dev_attr_protocol.attr,
&dev_attr_type.attr,
@@ -3005,6 +2717,21 @@ static struct attribute_group ctc_attr_g
};
static int
+ctc_add_attributes(struct device *dev)
+{
+ device_create_file(dev, &dev_attr_loglevel);
+ device_create_file(dev, &dev_attr_stats);
+ return 0;
+}
+
+static void
+ctc_remove_attributes(struct device *dev)
+{
+ device_remove_file(dev, &dev_attr_stats);
+ device_remove_file(dev, &dev_attr_loglevel);
+}
+
+static int
ctc_add_files(struct device *dev)
{
pr_debug("%s() called\n", __FUNCTION__);
@@ -3028,15 +2755,15 @@ ctc_remove_files(struct device *dev)
*
* @returns 0 on success, !0 on failure.
*/
-
static int
ctc_probe_device(struct ccwgroup_device *cgdev)
{
struct ctc_priv *priv;
int rc;
+ char buffer[16];
pr_debug("%s() called\n", __FUNCTION__);
- DBF_TEXT(trace, 3, __FUNCTION__);
+ DBF_TEXT(setup, 3, __FUNCTION__);
if (!get_device(&cgdev->dev))
return -ENODEV;
@@ -3060,10 +2787,70 @@ ctc_probe_device(struct ccwgroup_device
cgdev->cdev[1]->handler = ctc_irq_handler;
cgdev->dev.driver_data = priv;
+ sprintf(buffer, "%p", priv);
+ DBF_TEXT(data, 3, buffer);
+
+ sprintf(buffer, "%u", (unsigned int)sizeof(struct ctc_priv));
+ DBF_TEXT(data, 3, buffer);
+
+ sprintf(buffer, "%p", &channels);
+ DBF_TEXT(data, 3, buffer);
+
+ sprintf(buffer, "%u", (unsigned int)sizeof(struct channel));
+ DBF_TEXT(data, 3, buffer);
+
return 0;
}
/**
+ * Initialize everything of the net device except the name and the
+ * channel structs.
+ */
+static struct net_device *
+ctc_init_netdevice(struct net_device * dev, int alloc_device,
+ struct ctc_priv *privptr)
+{
+ if (!privptr)
+ return NULL;
+
+ DBF_TEXT(setup, 3, __FUNCTION__);
+
+ if (alloc_device) {
+ dev = kmalloc(sizeof (struct net_device), GFP_KERNEL);
+ if (!dev)
+ return NULL;
+ memset(dev, 0, sizeof (struct net_device));
+ }
+
+ dev->priv = privptr;
+ privptr->fsm = init_fsm("ctcdev", dev_state_names,
+ dev_event_names, CTC_NR_DEV_STATES, CTC_NR_DEV_EVENTS,
+ dev_fsm, DEV_FSM_LEN, GFP_KERNEL);
+ if (privptr->fsm == NULL) {
+ if (alloc_device)
+ kfree(dev);
+ return NULL;
+ }
+ fsm_newstate(privptr->fsm, DEV_STATE_STOPPED);
+ fsm_settimer(privptr->fsm, &privptr->restart_timer);
+ if (dev->mtu == 0)
+ dev->mtu = CTC_BUFSIZE_DEFAULT - LL_HEADER_LENGTH - 2;
+ dev->hard_start_xmit = ctc_tx;
+ dev->open = ctc_open;
+ dev->stop = ctc_close;
+ dev->get_stats = ctc_stats;
+ dev->change_mtu = ctc_change_mtu;
+ dev->hard_header_len = LL_HEADER_LENGTH + 2;
+ dev->addr_len = 0;
+ dev->type = ARPHRD_SLIP;
+ dev->tx_queue_len = 100;
+ dev->flags = IFF_POINTOPOINT | IFF_NOARP;
+ SET_MODULE_OWNER(dev);
+ return dev;
+}
+
+
+/**
*
* Setup an interface.
*
@@ -3081,6 +2868,7 @@ ctc_new_device(struct ccwgroup_device *c
struct ctc_priv *privptr;
struct net_device *dev;
int ret;
+ char buffer[16];
pr_debug("%s() called\n", __FUNCTION__);
DBF_TEXT(setup, 3, __FUNCTION__);
@@ -3089,6 +2877,9 @@ ctc_new_device(struct ccwgroup_device *c
if (!privptr)
return -ENODEV;
+ sprintf(buffer, "%d", privptr->buffer_size);
+ 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);
@@ -3177,9 +2968,10 @@ ctc_shutdown_device(struct ccwgroup_devi
struct ctc_priv *priv;
struct net_device *ndev;
- DBF_TEXT(trace, 3, __FUNCTION__);
+ DBF_TEXT(setup, 3, __FUNCTION__);
pr_debug("%s() called\n", __FUNCTION__);
+
priv = cgdev->dev.driver_data;
ndev = NULL;
if (!priv)
@@ -3215,7 +3007,6 @@ ctc_shutdown_device(struct ccwgroup_devi
channel_remove(priv->channel[READ]);
if (priv->channel[WRITE])
channel_remove(priv->channel[WRITE]);
-
priv->channel[READ] = priv->channel[WRITE] = NULL;
return 0;
@@ -3228,7 +3019,7 @@ ctc_remove_device(struct ccwgroup_device
struct ctc_priv *priv;
pr_debug("%s() called\n", __FUNCTION__);
- DBF_TEXT(trace, 3, __FUNCTION__);
+ DBF_TEXT(setup, 3, __FUNCTION__);
priv = cgdev->dev.driver_data;
if (!priv)
@@ -3265,6 +3056,7 @@ static struct ccwgroup_driver ctc_group_
static void __exit
ctc_exit(void)
{
+ DBF_TEXT(setup, 3, __FUNCTION__);
unregister_cu3088_discipline(&ctc_group_driver);
ctc_tty_cleanup();
ctc_unregister_dbf_views();
@@ -3282,6 +3074,10 @@ ctc_init(void)
{
int ret = 0;
+ loglevel = CTC_LOGLEVEL_DEFAULT;
+
+ DBF_TEXT(setup, 3, __FUNCTION__);
+
print_banner();
ret = ctc_register_dbf_views();
diff -urpN linux-2.6/drivers/s390/net/ctcmain.h linux-2.6-patched/drivers/s390/net/ctcmain.h
--- linux-2.6/drivers/s390/net/ctcmain.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6-patched/drivers/s390/net/ctcmain.h 2005-05-06 11:26:19.000000000 +0200
@@ -0,0 +1,276 @@
+/*
+ * $Id: ctcmain.h,v 1.4 2005/03/24 09:04:17 mschwide Exp $
+ *
+ * CTC / ESCON network driver
+ *
+ * Copyright (C) 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Author(s): Fritz Elfert (elfert@xxxxxxxxxx, felfert@xxxxxxxxxxxx)
+ Peter Tiedemann (ptiedem@xxxxxxxxxx)
+ *
+ *
+ * Documentation used:
+ * - Principles of Operation (IBM doc#: SA22-7201-06)
+ * - Common IO/-Device Commands and Self Description (IBM doc#: SA22-7204-02)
+ * - Common IO/-Device Commands and Self Description (IBM doc#: SN22-5535)
+ * - ESCON Channel-to-Channel Adapter (IBM doc#: SA22-7203-00)
+ * - ESCON I/O Interface (IBM doc#: SA22-7202-029
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * 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: 1.4 $
+ *
+ */
+
+#ifndef _CTCMAIN_H_
+#define _CTCMAIN_H_
+
+#include <asm/ccwdev.h>
+#include <asm/ccwgroup.h>
+
+#include "ctctty.h"
+#include "fsm.h"
+#include "cu3088.h"
+
+
+/**
+ * CCW commands, used in this driver.
+ */
+#define CCW_CMD_WRITE 0x01
+#define CCW_CMD_READ 0x02
+#define CCW_CMD_SET_EXTENDED 0xc3
+#define CCW_CMD_PREPARE 0xe3
+
+#define CTC_PROTO_S390 0
+#define CTC_PROTO_LINUX 1
+#define CTC_PROTO_LINUX_TTY 2
+#define CTC_PROTO_OS390 3
+#define CTC_PROTO_MAX 3
+
+#define CTC_BUFSIZE_LIMIT 65535
+#define CTC_BUFSIZE_DEFAULT 32768
+
+#define CTC_TIMEOUT_5SEC 5000
+
+#define CTC_INITIAL_BLOCKLEN 2
+
+#define READ 0
+#define WRITE 1
+
+#define CTC_ID_SIZE BUS_ID_SIZE+3
+
+
+struct ctc_profile {
+ unsigned long maxmulti;
+ unsigned long maxcqueue;
+ unsigned long doios_single;
+ unsigned long doios_multi;
+ unsigned long txlen;
+ unsigned long tx_time;
+ struct timespec send_stamp;
+};
+
+/**
+ * Definition of one channel
+ */
+struct channel {
+
+ /**
+ * Pointer to next channel in list.
+ */
+ struct channel *next;
+ char id[CTC_ID_SIZE];
+ struct ccw_device *cdev;
+
+ /**
+ * Type of this channel.
+ * CTC/A or Escon for valid channels.
+ */
+ enum channel_types type;
+
+ /**
+ * Misc. flags. See CHANNEL_FLAGS_... below
+ */
+ __u32 flags;
+
+ /**
+ * The protocol of this channel
+ */
+ __u16 protocol;
+
+ /**
+ * I/O and irq related stuff
+ */
+ struct ccw1 *ccw;
+ struct irb *irb;
+
+ /**
+ * RX/TX buffer size
+ */
+ int max_bufsize;
+
+ /**
+ * Transmit/Receive buffer.
+ */
+ struct sk_buff *trans_skb;
+
+ /**
+ * Universal I/O queue.
+ */
+ struct sk_buff_head io_queue;
+
+ /**
+ * TX queue for collecting skb's during busy.
+ */
+ struct sk_buff_head collect_queue;
+
+ /**
+ * Amount of data in collect_queue.
+ */
+ int collect_len;
+
+ /**
+ * spinlock for collect_queue and collect_len
+ */
+ spinlock_t collect_lock;
+
+ /**
+ * Timer for detecting unresposive
+ * I/O operations.
+ */
+ fsm_timer timer;
+
+ /**
+ * Retry counter for misc. operations.
+ */
+ int retry;
+
+ /**
+ * The finite state machine of this channel
+ */
+ fsm_instance *fsm;
+
+ /**
+ * The corresponding net_device this channel
+ * belongs to.
+ */
+ struct net_device *netdev;
+
+ struct ctc_profile prof;
+
+ unsigned char *trans_skb_data;
+
+ __u16 logflags;
+};
+
+#define CHANNEL_FLAGS_READ 0
+#define CHANNEL_FLAGS_WRITE 1
+#define CHANNEL_FLAGS_INUSE 2
+#define CHANNEL_FLAGS_BUFSIZE_CHANGED 4
+#define CHANNEL_FLAGS_FAILED 8
+#define CHANNEL_FLAGS_WAITIRQ 16
+#define CHANNEL_FLAGS_RWMASK 1
+#define CHANNEL_DIRECTION(f) (f & CHANNEL_FLAGS_RWMASK)
+
+#define LOG_FLAG_ILLEGALPKT 1
+#define LOG_FLAG_ILLEGALSIZE 2
+#define LOG_FLAG_OVERRUN 4
+#define LOG_FLAG_NOMEM 8
+
+#define CTC_LOGLEVEL_INFO 1
+#define CTC_LOGLEVEL_NOTICE 2
+#define CTC_LOGLEVEL_WARN 4
+#define CTC_LOGLEVEL_EMERG 8
+#define CTC_LOGLEVEL_ERR 16
+#define CTC_LOGLEVEL_DEBUG 32
+#define CTC_LOGLEVEL_CRIT 64
+
+#define CTC_LOGLEVEL_DEFAULT \
+(CTC_LOGLEVEL_INFO | CTC_LOGLEVEL_NOTICE | CTC_LOGLEVEL_WARN | CTC_LOGLEVEL_CRIT)
+
+#define CTC_LOGLEVEL_MAX ((CTC_LOGLEVEL_CRIT<<1)-1)
+
+#define ctc_pr_debug(fmt, arg...) \
+do { if (loglevel & CTC_LOGLEVEL_DEBUG) printk(KERN_DEBUG fmt,##arg); } while (0)
+
+#define ctc_pr_info(fmt, arg...) \
+do { if (loglevel & CTC_LOGLEVEL_INFO) printk(KERN_INFO fmt,##arg); } while (0)
+
+#define ctc_pr_notice(fmt, arg...) \
+do { if (loglevel & CTC_LOGLEVEL_NOTICE) printk(KERN_NOTICE fmt,##arg); } while (0)
+
+#define ctc_pr_warn(fmt, arg...) \
+do { if (loglevel & CTC_LOGLEVEL_WARN) printk(KERN_WARNING fmt,##arg); } while (0)
+
+#define ctc_pr_emerg(fmt, arg...) \
+do { if (loglevel & CTC_LOGLEVEL_EMERG) printk(KERN_EMERG fmt,##arg); } while (0)
+
+#define ctc_pr_err(fmt, arg...) \
+do { if (loglevel & CTC_LOGLEVEL_ERR) printk(KERN_ERR fmt,##arg); } while (0)
+
+#define ctc_pr_crit(fmt, arg...) \
+do { if (loglevel & CTC_LOGLEVEL_CRIT) printk(KERN_CRIT fmt,##arg); } while (0)
+
+struct ctc_priv {
+ struct net_device_stats stats;
+ unsigned long tbusy;
+ /**
+ * The finite state machine of this interface.
+ */
+ fsm_instance *fsm;
+ /**
+ * The protocol of this device
+ */
+ __u16 protocol;
+ /**
+ * Timer for restarting after I/O Errors
+ */
+ fsm_timer restart_timer;
+
+ int buffer_size;
+
+ struct channel *channel[2];
+};
+
+/**
+ * Definition of our link level header.
+ */
+struct ll_header {
+ __u16 length;
+ __u16 type;
+ __u16 unused;
+};
+#define LL_HEADER_LENGTH (sizeof(struct ll_header))
+
+/**
+ * Compatibility macros for busy handling
+ * of network devices.
+ */
+static __inline__ void
+ctc_clear_busy(struct net_device * dev)
+{
+ clear_bit(0, &(((struct ctc_priv *) dev->priv)->tbusy));
+ if (((struct ctc_priv *)dev->priv)->protocol != CTC_PROTO_LINUX_TTY)
+ netif_wake_queue(dev);
+}
+
+static __inline__ int
+ctc_test_and_set_busy(struct net_device * dev)
+{
+ if (((struct ctc_priv *)dev->priv)->protocol != CTC_PROTO_LINUX_TTY)
+ netif_stop_queue(dev);
+ return test_and_set_bit(0, &((struct ctc_priv *) dev->priv)->tbusy);
+}
+
+#endif
-
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