Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
diff --git a/drivers/s390/net/claw.c b/drivers/s390/net/claw.c
new file mode 100644
index 0000000..06804d3
--- /dev/null
+++ b/drivers/s390/net/claw.c
@@ -0,0 +1,4447 @@
+/*
+ *  drivers/s390/net/claw.c
+ *    ESCON CLAW network driver
+ *
+ *    $Revision: 1.35 $ $Date: 2005/03/24 12:25:38 $
+ *
+ *  Linux fo zSeries version
+ *    Copyright (C) 2002,2005 IBM Corporation
+ *  Author(s) Original code written by:
+ *              Kazuo Iimura (iimura@jp.ibm.com)
+ *   	      Rewritten by
+ *              Andy Richter (richtera@us.ibm.com)
+ *              Marc Price (mwprice@us.ibm.com)
+ *
+ *    sysfs parms:
+ *   group x.x.rrrr,x.x.wwww
+ *   read_buffer nnnnnnn
+ *   write_buffer nnnnnn
+ *   host_name  aaaaaaaa
+ *   adapter_name aaaaaaaa
+ *   api_type    aaaaaaaa
+ *
+ *  eg.
+ *   group  0.0.0200 0.0.0201
+ *   read_buffer 25
+ *   write_buffer 20
+ *   host_name LINUX390
+ *   adapter_name RS6K
+ *   api_type     TCPIP
+ *
+ *  where
+ *
+ *   The device id is decided by the order entries
+ *   are added to the group the first is claw0 the second claw1
+ *   up to CLAW_MAX_DEV
+ *
+ *   rrrr     -	the first of 2 consecutive device addresses used for the
+ *		CLAW protocol.
+ *		The specified address is always used as the input (Read)
+ *		channel and the next address is used as the output channel.
+ *
+ *   wwww     -	the second of 2 consecutive device addresses used for
+ *		the CLAW protocol.
+ *              The specified address is always used as the output
+ *		channel and the previous address is used as the input channel.
+ *
+ *   read_buffer	-       specifies number of input buffers to allocate.
+ *   write_buffer       -       specifies number of output buffers to allocate.
+ *   host_name          -       host name
+ *   adaptor_name       -       adaptor name
+ *   api_type           -       API type TCPIP or API will be sent and expected
+ *				as ws_name
+ *
+ *   Note the following requirements:
+ *   1)  host_name must match the configured adapter_name on the remote side
+ *   2)  adaptor_name must match the configured host name on the remote side
+ *
+ *  Change History
+ *    1.00  Initial release shipped
+ *    1.10  Changes for Buffer allocation
+ *    1.15  Changed for 2.6 Kernel  No longer compiles on 2.4 or lower
+ *    1.25  Added Packing support
+ */
+#include <asm/bitops.h>
+#include <asm/ccwdev.h>
+#include <asm/ccwgroup.h>
+#include <asm/debug.h>
+#include <asm/idals.h>
+#include <asm/io.h>
+
+#include <linux/ctype.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/if_arp.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ip.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/proc_fs.h>
+#include <linux/sched.h>
+#include <linux/signal.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/tcp.h>
+#include <linux/timer.h>
+#include <linux/types.h>
+#include <linux/version.h>
+
+#include "cu3088.h"
+#include "claw.h"
+
+MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
+MODULE_DESCRIPTION("Linux for zSeries CLAW Driver\n" \
+			"Copyright 2000,2005 IBM Corporation\n");
+MODULE_LICENSE("GPL");
+
+/* Debugging is based on DEBUGMSG, IOTRACE, or FUNCTRACE  options:
+   DEBUGMSG  - Enables output of various debug messages in the code
+   IOTRACE   - Enables output of CCW and other IO related traces
+   FUNCTRACE - Enables output of function entry/exit trace
+   Define any combination of above options to enable tracing
+
+   CLAW also uses the s390dbf file system  see claw_trace and claw_setup
+*/
+
+/* following enables tracing */
+//#define DEBUGMSG
+//#define IOTRACE
+//#define FUNCTRACE
+
+#ifdef DEBUGMSG
+#define DEBUG
+#endif
+
+#ifdef IOTRACE
+#define DEBUG
+#endif
+
+#ifdef FUNCTRACE
+#define DEBUG
+#endif
+
+ char debug_buffer[255];
+/**
+ * Debug Facility Stuff
+ */
+static debug_info_t *claw_dbf_setup;
+static debug_info_t *claw_dbf_trace;
+
+/**
+ *  CLAW Debug Facility functions
+ */
+static void
+claw_unregister_debug_facility(void)
+{
+	if (claw_dbf_setup)
+		debug_unregister(claw_dbf_setup);
+	if (claw_dbf_trace)
+		debug_unregister(claw_dbf_trace);
+}
+
+static int
+claw_register_debug_facility(void)
+{
+	claw_dbf_setup = debug_register("claw_setup", 1, 1, 8);
+	claw_dbf_trace = debug_register("claw_trace", 1, 2, 8);
+	if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
+		printk(KERN_WARNING "Not enough memory for debug facility.\n");
+		claw_unregister_debug_facility();
+		return -ENOMEM;
+	}
+	debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
+	debug_set_level(claw_dbf_setup, 2);
+	debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
+	debug_set_level(claw_dbf_trace, 2);
+	return 0;
+}
+
+static inline void
+claw_set_busy(struct net_device *dev)
+{
+ ((struct claw_privbk *) dev->priv)->tbusy=1;
+ eieio();
+}
+
+static inline void
+claw_clear_busy(struct net_device *dev)
+{
+	clear_bit(0, &(((struct claw_privbk *) dev->priv)->tbusy));
+	netif_wake_queue(dev);
+	eieio();
+}
+
+static inline int
+claw_check_busy(struct net_device *dev)
+{
+	eieio();
+	return ((struct claw_privbk *) dev->priv)->tbusy;
+}
+
+static inline void
+claw_setbit_busy(int nr,struct net_device *dev)
+{
+	netif_stop_queue(dev);
+ 	set_bit(nr, (void *)&(((struct claw_privbk *)dev->priv)->tbusy));
+}
+
+static inline void
+claw_clearbit_busy(int nr,struct net_device *dev)
+{
+ 	clear_bit(nr,(void *)&(((struct claw_privbk *)dev->priv)->tbusy));
+	netif_wake_queue(dev);
+}
+
+static inline int
+claw_test_and_setbit_busy(int nr,struct net_device *dev)
+{
+	netif_stop_queue(dev);
+	return test_and_set_bit(nr,
+ 		(void *)&(((struct claw_privbk *) dev->priv)->tbusy));
+}
+
+
+/* Functions for the DEV methods */
+
+static int claw_probe(struct ccwgroup_device *cgdev);
+static void claw_remove_device(struct ccwgroup_device *cgdev);
+static void claw_purge_skb_queue(struct sk_buff_head *q);
+static int claw_new_device(struct ccwgroup_device *cgdev);
+static int claw_shutdown_device(struct ccwgroup_device *cgdev);
+static int claw_tx(struct sk_buff *skb, struct net_device *dev);
+static int claw_change_mtu( struct net_device *dev, int new_mtu);
+static int claw_open(struct net_device *dev);
+static void claw_irq_handler(struct ccw_device *cdev,
+	unsigned long intparm, struct irb *irb);
+static void claw_irq_tasklet ( unsigned long data );
+static int claw_release(struct net_device *dev);
+static void claw_write_retry ( struct chbk * p_ch );
+static void claw_write_next ( struct chbk * p_ch );
+static void claw_timer ( struct chbk * p_ch );
+
+/* Functions */
+static int add_claw_reads(struct net_device *dev,
+	struct ccwbk* p_first, struct ccwbk* p_last);
+static void inline ccw_check_return_code (struct ccw_device *cdev,
+        int return_code);
+static void inline ccw_check_unit_check (struct chbk * p_ch,
+	unsigned char sense );
+static int find_link(struct net_device *dev, char *host_name, char *ws_name );
+static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
+static int init_ccw_bk(struct net_device *dev);
+static void probe_error( struct ccwgroup_device *cgdev);
+static struct net_device_stats *claw_stats(struct net_device *dev);
+static int inline pages_to_order_of_mag(int num_of_pages);
+static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
+#ifdef DEBUG
+static void dumpit (char *buf, int len);
+#endif
+/* sysfs Functions */
+static ssize_t claw_hname_show(struct device *dev, char *buf);
+static ssize_t claw_hname_write(struct device *dev,
+	const char *buf, size_t count);
+static ssize_t claw_adname_show(struct device *dev, char *buf);
+static ssize_t claw_adname_write(struct device *dev,
+	const char *buf, size_t count);
+static ssize_t claw_apname_show(struct device *dev, char *buf);
+static ssize_t claw_apname_write(struct device *dev,
+	const char *buf, size_t count);
+static ssize_t claw_wbuff_show(struct device *dev, char *buf);
+static ssize_t claw_wbuff_write(struct device *dev,
+	const char *buf, size_t count);
+static ssize_t claw_rbuff_show(struct device *dev, char *buf);
+static ssize_t claw_rbuff_write(struct device *dev,
+	const char *buf, size_t count);
+static int claw_add_files(struct device *dev);
+static void claw_remove_files(struct device *dev);
+
+/*   Functions for System Validate  */
+static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
+static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
+       __u8 correlator, __u8 rc , char *local_name, char *remote_name);
+static int claw_snd_conn_req(struct net_device *dev, __u8 link);
+static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
+static int claw_snd_sys_validate_rsp(struct net_device *dev,
+        struct clawctl * p_ctl, __u32 return_code);
+static int claw_strt_conn_req(struct net_device *dev );
+static void claw_strt_read ( struct net_device *dev, int lock );
+static void claw_strt_out_IO( struct net_device *dev );
+static void claw_free_wrt_buf( struct net_device *dev );
+
+/* Functions for unpack reads   */
+static void unpack_read (struct net_device *dev );
+
+/* ccwgroup table  */
+
+static struct ccwgroup_driver claw_group_driver = {
+        .owner       = THIS_MODULE,
+        .name        = "claw",
+        .max_slaves  = 2,
+        .driver_id   = 0xC3D3C1E6,
+        .probe       = claw_probe,
+        .remove      = claw_remove_device,
+        .set_online  = claw_new_device,
+        .set_offline = claw_shutdown_device,
+};
+
+/*
+*
+*       Key functions
+*/
+
+/*----------------------------------------------------------------*
+ *   claw_probe                                                   *
+ *      this function is called for each CLAW device.             *
+ *----------------------------------------------------------------*/
+static int
+claw_probe(struct ccwgroup_device *cgdev)
+{
+	int  		rc;
+	struct claw_privbk *privptr=NULL;
+
+#ifdef FUNCTRACE
+	printk(KERN_INFO "%s Enter\n",__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(2,setup,"probe");
+	if (!get_device(&cgdev->dev))
+		return -ENODEV;
+#ifdef DEBUGMSG
+        printk(KERN_INFO "claw: variable cgdev =\n");
+        dumpit((char *)cgdev, sizeof(struct ccwgroup_device));
+#endif
+	privptr = kmalloc(sizeof(struct claw_privbk), GFP_KERNEL);
+	if (privptr == NULL) {
+		probe_error(cgdev);
+		put_device(&cgdev->dev);
+		printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
+			cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
+		CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
+		return -ENOMEM;
+	}
+	memset(privptr,0x00,sizeof(struct claw_privbk));
+	privptr->p_mtc_envelope= kmalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
+	privptr->p_env = kmalloc(sizeof(struct claw_env), GFP_KERNEL);
+        if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
+                probe_error(cgdev);
+		put_device(&cgdev->dev);
+		printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
+			cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
+		CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
+                return -ENOMEM;
+        }
+	memset(privptr->p_mtc_envelope, 0x00, MAX_ENVELOPE_SIZE);
+	memset(privptr->p_env, 0x00, sizeof(struct claw_env));
+	memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
+	memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
+	memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
+	privptr->p_env->packing = 0;
+	privptr->p_env->write_buffers = 5;
+	privptr->p_env->read_buffers = 5;
+	privptr->p_env->read_size = CLAW_FRAME_SIZE;
+	privptr->p_env->write_size = CLAW_FRAME_SIZE;
+	rc = claw_add_files(&cgdev->dev);
+	if (rc) {
+		probe_error(cgdev);
+		put_device(&cgdev->dev);
+		printk(KERN_WARNING "add_files failed %s %s Exit Line %d \n",
+			cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
+		CLAW_DBF_TEXT_(2,setup,"probex%d",rc);
+		return rc;
+	}
+	printk(KERN_INFO "claw: sysfs files added for %s\n",cgdev->cdev[0]->dev.bus_id);
+	privptr->p_env->p_priv = privptr;
+        cgdev->cdev[0]->handler = claw_irq_handler;
+	cgdev->cdev[1]->handler = claw_irq_handler;
+	cgdev->dev.driver_data = privptr;
+#ifdef FUNCTRACE
+        printk(KERN_INFO "claw:%s exit on line %d, "
+		"rc = 0\n",__FUNCTION__,__LINE__);
+#endif
+	CLAW_DBF_TEXT(2,setup,"prbext 0");
+
+        return 0;
+}  /*  end of claw_probe       */
+
+/*-------------------------------------------------------------------*
+ *   claw_tx                                                         *
+ *-------------------------------------------------------------------*/
+
+static int
+claw_tx(struct sk_buff *skb, struct net_device *dev)
+{
+        int             rc;
+        struct claw_privbk *privptr=dev->priv;
+	unsigned long saveflags;
+        struct chbk *p_ch;
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s enter\n",dev->name,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(4,trace,"claw_tx");
+        p_ch=&privptr->channel[WRITE];
+        if (skb == NULL) {
+                printk(KERN_WARNING "%s: null pointer passed as sk_buffer\n",
+			dev->name);
+                privptr->stats.tx_dropped++;
+#ifdef FUNCTRACE
+                printk(KERN_INFO "%s: %s() exit on line %d, rc = EIO\n",
+			dev->name,__FUNCTION__, __LINE__);
+#endif
+		CLAW_DBF_TEXT_(2,trace,"clawtx%d",-EIO);
+                return -EIO;
+        }
+
+#ifdef IOTRACE
+        printk(KERN_INFO "%s: variable sk_buff=\n",dev->name);
+        dumpit((char *) skb, sizeof(struct sk_buff));
+        printk(KERN_INFO "%s: variable dev=\n",dev->name);
+        dumpit((char *) dev, sizeof(struct net_device));
+#endif
+        spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
+        rc=claw_hw_tx( skb, dev, 1 );
+        spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s exit on line %d, rc = %d\n",
+		dev->name, __FUNCTION__, __LINE__, rc);
+#endif
+	CLAW_DBF_TEXT_(4,trace,"clawtx%d",rc);
+        return rc;
+}   /*  end of claw_tx */
+
+/*------------------------------------------------------------------*
+ *  pack the collect queue into an skb and return it                *
+ *   If not packing just return the top skb from the queue          *
+ *------------------------------------------------------------------*/
+
+static struct sk_buff *
+claw_pack_skb(struct claw_privbk *privptr)
+{
+	struct sk_buff *new_skb,*held_skb;
+	struct chbk *p_ch = &privptr->channel[WRITE];
+	struct claw_env  *p_env = privptr->p_env;
+	int	pkt_cnt,pk_ind,so_far;
+
+	new_skb = NULL;		/* assume no dice */
+	pkt_cnt = 0;
+	CLAW_DBF_TEXT(4,trace,"PackSKBe");
+	if (skb_queue_len(&p_ch->collect_queue) > 0) {
+	/* some data */
+		held_skb = skb_dequeue(&p_ch->collect_queue);
+		if (p_env->packing != DO_PACKED)
+			return held_skb;
+		if (held_skb)
+			atomic_dec(&held_skb->users);
+		else
+			return NULL;
+		/* get a new SKB we will pack at least one */
+		new_skb = dev_alloc_skb(p_env->write_size);
+		if (new_skb == NULL) {
+			atomic_inc(&held_skb->users);
+			skb_queue_head(&p_ch->collect_queue,held_skb);
+			return NULL;
+		}
+		/* we have packed packet and a place to put it  */
+		pk_ind = 1;
+		so_far = 0;
+		new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
+		while ((pk_ind) && (held_skb != NULL)) {
+			if (held_skb->len+so_far <= p_env->write_size-8) {
+				memcpy(skb_put(new_skb,held_skb->len),
+					held_skb->data,held_skb->len);
+				privptr->stats.tx_packets++;
+				so_far += held_skb->len;
+				pkt_cnt++;
+				dev_kfree_skb_irq(held_skb);
+				held_skb = skb_dequeue(&p_ch->collect_queue);
+				if (held_skb)
+					atomic_dec(&held_skb->users);
+			} else {
+				pk_ind = 0;
+				atomic_inc(&held_skb->users);
+				skb_queue_head(&p_ch->collect_queue,held_skb);
+			}
+		}
+#ifdef IOTRACE
+		printk(KERN_INFO "%s: %s() Packed %d len %d\n",
+			p_env->ndev->name,
+			__FUNCTION__,pkt_cnt,new_skb->len);
+#endif
+	}
+	CLAW_DBF_TEXT(4,trace,"PackSKBx");
+	return new_skb;
+}
+
+/*-------------------------------------------------------------------*
+ *   claw_change_mtu                                                 *
+ *                                                                   *
+ *-------------------------------------------------------------------*/
+
+static int
+claw_change_mtu(struct net_device *dev, int new_mtu)
+{
+	struct claw_privbk  *privptr=dev->priv;
+	int buff_size;
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
+#endif
+#ifdef DEBUGMSG
+        printk(KERN_INFO "variable dev =\n");
+        dumpit((char *) dev, sizeof(struct net_device));
+        printk(KERN_INFO "variable new_mtu = %d\n", new_mtu);
+#endif
+	CLAW_DBF_TEXT(4,trace,"setmtu");
+	buff_size = privptr->p_env->write_size;
+        if ((new_mtu < 60) || (new_mtu > buff_size)) {
+#ifdef FUNCTRACE
+                printk(KERN_INFO "%s:%s Exit on line %d, rc=EINVAL\n",
+		dev->name,
+		__FUNCTION__, __LINE__);
+#endif
+                return -EINVAL;
+        }
+        dev->mtu = new_mtu;
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Exit on line %d\n",dev->name,
+	__FUNCTION__, __LINE__);
+#endif
+        return 0;
+}  /*   end of claw_change_mtu */
+
+
+/*-------------------------------------------------------------------*
+ *   claw_open                                                       *
+ *                                                                   *
+ *-------------------------------------------------------------------*/
+static int
+claw_open(struct net_device *dev)
+{
+
+        int     rc;
+        int     i;
+        unsigned long       saveflags=0;
+        unsigned long       parm;
+        struct claw_privbk  *privptr;
+	DECLARE_WAITQUEUE(wait, current);
+        struct timer_list  timer;
+        struct ccwbk *p_buf;
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(4,trace,"open");
+	if (!dev | (dev->name[0] == 0x00)) {
+		CLAW_DBF_TEXT(2,trace,"BadDev");
+	 	printk(KERN_WARNING "claw: Bad device at open failing \n");
+		return -ENODEV;
+	}
+	privptr = (struct claw_privbk *)dev->priv;
+        /*   allocate and initialize CCW blocks */
+	if (privptr->buffs_alloc == 0) {
+	        rc=init_ccw_bk(dev);
+        	if (rc) {
+                	printk(KERN_INFO "%s:%s Exit on line %d, rc=ENOMEM\n",
+			dev->name,
+			__FUNCTION__, __LINE__);
+			CLAW_DBF_TEXT(2,trace,"openmem");
+                	return -ENOMEM;
+        	}
+	}
+        privptr->system_validate_comp=0;
+        privptr->release_pend=0;
+	if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
+		privptr->p_env->read_size=DEF_PACK_BUFSIZE;
+		privptr->p_env->write_size=DEF_PACK_BUFSIZE;
+		privptr->p_env->packing=PACKING_ASK;
+	} else {
+		privptr->p_env->packing=0;
+		privptr->p_env->read_size=CLAW_FRAME_SIZE;
+		privptr->p_env->write_size=CLAW_FRAME_SIZE;
+	}
+        claw_set_busy(dev);
+	tasklet_init(&privptr->channel[READ].tasklet, claw_irq_tasklet,
+        	(unsigned long) &privptr->channel[READ]);
+        for ( i = 0; i < 2;  i++) {
+		CLAW_DBF_TEXT_(2,trace,"opn_ch%d",i);
+                init_waitqueue_head(&privptr->channel[i].wait);
+		/* skb_queue_head_init(&p_ch->io_queue); */
+		if (i == WRITE)
+			skb_queue_head_init(
+				&privptr->channel[WRITE].collect_queue);
+                privptr->channel[i].flag_a = 0;
+                privptr->channel[i].IO_active = 0;
+                privptr->channel[i].flag  &= ~CLAW_TIMER;
+                init_timer(&timer);
+                timer.function = (void *)claw_timer;
+                timer.data = (unsigned long)(&privptr->channel[i]);
+                timer.expires = jiffies + 15*HZ;
+                add_timer(&timer);
+                spin_lock_irqsave(get_ccwdev_lock(
+			privptr->channel[i].cdev), saveflags);
+                parm = (unsigned long) &privptr->channel[i];
+                privptr->channel[i].claw_state = CLAW_START_HALT_IO;
+		rc = 0;
+		add_wait_queue(&privptr->channel[i].wait, &wait);
+                rc = ccw_device_halt(
+			(struct ccw_device *)privptr->channel[i].cdev,parm);
+                set_current_state(TASK_INTERRUPTIBLE);
+                spin_unlock_irqrestore(
+			get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
+                schedule();
+		set_current_state(TASK_RUNNING);
+                remove_wait_queue(&privptr->channel[i].wait, &wait);
+                if(rc != 0)
+                        ccw_check_return_code(privptr->channel[i].cdev, rc);
+                if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
+                        del_timer(&timer);
+        }
+        if ((((privptr->channel[READ].last_dstat |
+		privptr->channel[WRITE].last_dstat) &
+           ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
+           (((privptr->channel[READ].flag |
+	   	privptr->channel[WRITE].flag) & CLAW_TIMER) != 0x00)) {
+#ifdef DEBUGMSG
+                printk(KERN_INFO "%s: channel problems during open - read:"
+			" %02x -  write: %02x\n",
+                        dev->name,
+			privptr->channel[READ].last_dstat,
+			privptr->channel[WRITE].last_dstat);
+#endif
+                printk(KERN_INFO "%s: remote side is not ready\n", dev->name);
+		CLAW_DBF_TEXT(2,trace,"notrdy");
+
+                for ( i = 0; i < 2;  i++) {
+                        spin_lock_irqsave(
+				get_ccwdev_lock(privptr->channel[i].cdev),
+				saveflags);
+                        parm = (unsigned long) &privptr->channel[i];
+                        privptr->channel[i].claw_state = CLAW_STOP;
+                        rc = ccw_device_halt(
+				(struct ccw_device *)&privptr->channel[i].cdev,
+				parm);
+                        spin_unlock_irqrestore(
+				get_ccwdev_lock(privptr->channel[i].cdev),
+				saveflags);
+                        if (rc != 0) {
+                                ccw_check_return_code(
+					privptr->channel[i].cdev, rc);
+                        }
+                }
+                free_pages((unsigned long)privptr->p_buff_ccw,
+			(int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
+                if (privptr->p_env->read_size < PAGE_SIZE) {
+                        free_pages((unsigned long)privptr->p_buff_read,
+			       (int)pages_to_order_of_mag(
+			       		privptr->p_buff_read_num));
+                }
+                else {
+                        p_buf=privptr->p_read_active_first;
+                        while (p_buf!=NULL) {
+                                free_pages((unsigned long)p_buf->p_buffer,
+				      (int)pages_to_order_of_mag(
+				      	privptr->p_buff_pages_perread ));
+                                p_buf=p_buf->next;
+                        }
+                }
+                if (privptr->p_env->write_size < PAGE_SIZE ) {
+                        free_pages((unsigned long)privptr->p_buff_write,
+			     (int)pages_to_order_of_mag(
+			     	privptr->p_buff_write_num));
+                }
+                else {
+                        p_buf=privptr->p_write_active_first;
+                        while (p_buf!=NULL) {
+                                free_pages((unsigned long)p_buf->p_buffer,
+				     (int)pages_to_order_of_mag(
+				     	privptr->p_buff_pages_perwrite ));
+                                p_buf=p_buf->next;
+                        }
+                }
+		privptr->buffs_alloc = 0;
+		privptr->channel[READ].flag= 0x00;
+		privptr->channel[WRITE].flag = 0x00;
+                privptr->p_buff_ccw=NULL;
+                privptr->p_buff_read=NULL;
+                privptr->p_buff_write=NULL;
+                claw_clear_busy(dev);
+#ifdef FUNCTRACE
+                printk(KERN_INFO "%s:%s Exit on line %d, rc=EIO\n",
+		dev->name,__FUNCTION__,__LINE__);
+#endif
+		CLAW_DBF_TEXT(2,trace,"open EIO");
+                return -EIO;
+        }
+
+        /*   Send SystemValidate command */
+
+        claw_clear_busy(dev);
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Exit on line %d, rc=0\n",
+		dev->name,__FUNCTION__,__LINE__);
+#endif
+	CLAW_DBF_TEXT(4,trace,"openok");
+        return 0;
+}    /*     end of claw_open    */
+
+/*-------------------------------------------------------------------*
+*                                                                    *
+*       claw_irq_handler                                             *
+*                                                                    *
+*--------------------------------------------------------------------*/
+static void
+claw_irq_handler(struct ccw_device *cdev,
+	unsigned long intparm, struct irb *irb)
+{
+        struct chbk *p_ch = NULL;
+        struct claw_privbk *privptr = NULL;
+        struct net_device *dev = NULL;
+        struct claw_env  *p_env;
+        struct chbk *p_ch_r=NULL;
+
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s enter  \n",__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(4,trace,"clawirq");
+        /* Bypass all 'unsolicited interrupts' */
+	if (!cdev->dev.driver_data) {
+                printk(KERN_WARNING "claw: unsolicited interrupt for device:"
+		 	"%s received c-%02x d-%02x\n",
+                        cdev->dev.bus_id,irb->scsw.cstat, irb->scsw.dstat);
+#ifdef FUNCTRACE
+                printk(KERN_INFO "claw: %s() "
+			"exit on line %d\n",__FUNCTION__,__LINE__);
+#endif
+		CLAW_DBF_TEXT(2,trace,"badirq");
+                return;
+        }
+	privptr = (struct claw_privbk *)cdev->dev.driver_data;
+
+	/* Try to extract channel from driver data. */
+	if (privptr->channel[READ].cdev == cdev)
+		p_ch = &privptr->channel[READ];
+	else if (privptr->channel[WRITE].cdev == cdev)
+		p_ch = &privptr->channel[WRITE];
+	else {
+		printk(KERN_WARNING "claw: Can't determine channel for "
+			"interrupt, device %s\n", cdev->dev.bus_id);
+		CLAW_DBF_TEXT(2,trace,"badchan");
+		return;
+	}
+	CLAW_DBF_TEXT_(4,trace,"IRQCH=%d",p_ch->flag);
+
+	dev = (struct net_device *) (p_ch->ndev);
+        p_env=privptr->p_env;
+
+#ifdef IOTRACE
+        printk(KERN_INFO "%s: interrupt for device: %04x "
+		"received c-%02x d-%02x state-%02x\n",
+                dev->name, p_ch->devno, irb->scsw.cstat,
+		irb->scsw.dstat, p_ch->claw_state);
+#endif
+
+	/* Copy interruption response block. */
+	memcpy(p_ch->irb, irb, sizeof(struct irb));
+
+        /* Check for good subchannel return code, otherwise error message */
+        if (irb->scsw.cstat  &&  !(irb->scsw.cstat & SCHN_STAT_PCI)) {
+                printk(KERN_INFO "%s: subchannel check for device: %04x -"
+			" Sch Stat %02x  Dev Stat %02x CPA - %04x\n",
+                        dev->name, p_ch->devno,
+			irb->scsw.cstat, irb->scsw.dstat,irb->scsw.cpa);
+#ifdef IOTRACE
+		dumpit((char *)irb,sizeof(struct irb));
+		dumpit((char *)(unsigned long)irb->scsw.cpa,
+			sizeof(struct ccw1));
+#endif
+#ifdef FUNCTRACE
+		printk(KERN_INFO "%s:%s Exit on line %d\n",
+		dev->name,__FUNCTION__,__LINE__);
+#endif
+		CLAW_DBF_TEXT(2,trace,"chanchk");
+                /* return; */
+        }
+
+        /* Check the reason-code of a unit check */
+        if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
+                ccw_check_unit_check(p_ch, irb->ecw[0]);
+        }
+
+        /* State machine to bring the connection up, down and to restart */
+        p_ch->last_dstat = irb->scsw.dstat;
+
+        switch (p_ch->claw_state) {
+                case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
+#ifdef DEBUGMSG
+                        printk(KERN_INFO "%s: CLAW_STOP enter\n", dev->name);
+#endif
+                        if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
+	    		(p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
+	    		(p_ch->irb->scsw.stctl ==
+	     		(SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
+#ifdef FUNCTRACE
+                                printk(KERN_INFO "%s:%s Exit on line %d\n",
+					dev->name,__FUNCTION__,__LINE__);
+#endif
+                                return;
+                        }
+                        wake_up(&p_ch->wait);   /* wake up claw_release */
+
+#ifdef DEBUGMSG
+                        printk(KERN_INFO "%s: CLAW_STOP exit\n", dev->name);
+#endif
+#ifdef FUNCTRACE
+                        printk(KERN_INFO "%s:%s Exit on line %d\n",
+				dev->name,__FUNCTION__,__LINE__);
+#endif
+			CLAW_DBF_TEXT(4,trace,"stop");
+                        return;
+
+                case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open  */
+#ifdef DEBUGMSG
+                        printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO\n",
+				dev->name);
+#endif
+                        if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
+	    		(p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
+	    		(p_ch->irb->scsw.stctl ==
+	     		(SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
+#ifdef FUNCTRACE
+				printk(KERN_INFO "%s:%s Exit on line %d\n",
+					dev->name,__FUNCTION__,__LINE__);
+#endif
+				CLAW_DBF_TEXT(4,trace,"haltio");
+                                return;
+                        }
+                        if (p_ch->flag == CLAW_READ) {
+                                p_ch->claw_state = CLAW_START_READ;
+                                wake_up(&p_ch->wait); /* wake claw_open (READ)*/
+                        }
+			else
+			   if (p_ch->flag == CLAW_WRITE) {
+                                p_ch->claw_state = CLAW_START_WRITE;
+                                /*      send SYSTEM_VALIDATE                    */
+                                claw_strt_read(dev, LOCK_NO);
+                               	claw_send_control(dev,
+					SYSTEM_VALIDATE_REQUEST,
+					0, 0, 0,
+					p_env->host_name,
+					p_env->adapter_name );
+                        } else {
+				printk(KERN_WARNING "claw: unsolicited "
+					"interrupt for device:"
+				 	"%s received c-%02x d-%02x\n",
+                		        cdev->dev.bus_id,
+					irb->scsw.cstat,
+					irb->scsw.dstat);
+				return;
+				}
+#ifdef DEBUGMSG
+                        printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO exit\n",
+				dev->name);
+#endif
+#ifdef FUNCTRACE
+                        printk(KERN_INFO "%s:%s Exit on line %d\n",
+				dev->name,__FUNCTION__,__LINE__);
+#endif
+			CLAW_DBF_TEXT(4,trace,"haltio");
+                        return;
+                case CLAW_START_READ:
+			CLAW_DBF_TEXT(4,trace,"ReadIRQ");
+                        if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
+                                clear_bit(0, (void *)&p_ch->IO_active);
+                                if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
+                                    (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
+                                    (p_ch->irb->ecw[0])        == 0)
+                                {
+                                        privptr->stats.rx_errors++;
+                                        printk(KERN_INFO "%s: Restart is "
+						"required after remote "
+						"side recovers \n",
+						dev->name);
+                                }
+#ifdef FUNCTRACE
+				printk(KERN_INFO "%s:%s Exit on line %d\n",
+					dev->name,__FUNCTION__,__LINE__);
+#endif
+					CLAW_DBF_TEXT(4,trace,"notrdy");
+                                        return;
+                        }
+                        if ((p_ch->irb->scsw.cstat & SCHN_STAT_PCI) &&
+			    (p_ch->irb->scsw.dstat==0)) {
+                                if (test_and_set_bit(CLAW_BH_ACTIVE,
+					(void *)&p_ch->flag_a) == 0) {
+					tasklet_schedule(&p_ch->tasklet);
+                                }
+				else {
+					CLAW_DBF_TEXT(4,trace,"PCINoBH");
+				}
+#ifdef FUNCTRACE
+				printk(KERN_INFO "%s:%s Exit on line %d\n",
+					dev->name,__FUNCTION__,__LINE__);
+#endif
+				CLAW_DBF_TEXT(4,trace,"PCI_read");
+                                return;
+                        }
+                        if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
+	    		 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
+	    		 (p_ch->irb->scsw.stctl ==
+	     		 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
+#ifdef FUNCTRACE
+				printk(KERN_INFO "%s:%s Exit on line %d\n",
+					dev->name,__FUNCTION__,__LINE__);
+#endif
+				CLAW_DBF_TEXT(4,trace,"SPend_rd");
+                                return;
+                        }
+                        clear_bit(0, (void *)&p_ch->IO_active);
+                        claw_clearbit_busy(TB_RETRY,dev);
+                        if (test_and_set_bit(CLAW_BH_ACTIVE,
+    				(void *)&p_ch->flag_a) == 0) {
+    				tasklet_schedule(&p_ch->tasklet);
+                         }
+    			else {
+    				CLAW_DBF_TEXT(4,trace,"RdBHAct");
+    			}
+
+#ifdef DEBUGMSG
+                        printk(KERN_INFO "%s: process CLAW_START_READ exit\n",
+				dev->name);
+#endif
+#ifdef FUNCTRACE
+			printk(KERN_INFO "%s:%s Exit on line %d\n",
+				dev->name,__FUNCTION__,__LINE__);
+#endif
+			CLAW_DBF_TEXT(4,trace,"RdIRQXit");
+                        return;
+                case CLAW_START_WRITE:
+                        if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
+                                printk(KERN_INFO "%s: Unit Check Occured in "
+					"write channel\n",dev->name);
+                                clear_bit(0, (void *)&p_ch->IO_active);
+                                if (p_ch->irb->ecw[0] & 0x80 ) {
+                                        printk(KERN_INFO "%s: Resetting Event "
+						"occurred:\n",dev->name);
+                                        init_timer(&p_ch->timer);
+                                        p_ch->timer.function =
+						(void *)claw_write_retry;
+                                        p_ch->timer.data = (unsigned long)p_ch;
+                                        p_ch->timer.expires = jiffies + 10*HZ;
+                                        add_timer(&p_ch->timer);
+                                        printk(KERN_INFO "%s: write connection "
+						"restarting\n",dev->name);
+                                }
+#ifdef FUNCTRACE
+				printk(KERN_INFO "%s:%s Exit on line %d\n",
+					dev->name,__FUNCTION__,__LINE__);
+#endif
+				CLAW_DBF_TEXT(4,trace,"rstrtwrt");
+                                return;
+                        }
+                        if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) {
+                                        clear_bit(0, (void *)&p_ch->IO_active);
+                                        printk(KERN_INFO "%s: Unit Exception "
+						"Occured in write channel\n",
+						dev->name);
+                        }
+                        if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
+	    		(p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
+	    		(p_ch->irb->scsw.stctl ==
+	     		(SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
+#ifdef FUNCTRACE
+				printk(KERN_INFO "%s:%s Exit on line %d\n",
+					dev->name,__FUNCTION__,__LINE__);
+#endif
+				CLAW_DBF_TEXT(4,trace,"writeUE");
+                                return;
+                        }
+                        clear_bit(0, (void *)&p_ch->IO_active);
+                        if (claw_test_and_setbit_busy(TB_TX,dev)==0) {
+                                claw_write_next(p_ch);
+                                claw_clearbit_busy(TB_TX,dev);
+                                claw_clear_busy(dev);
+                        }
+                        p_ch_r=(struct chbk *)&privptr->channel[READ];
+                        if (test_and_set_bit(CLAW_BH_ACTIVE,
+ 					(void *)&p_ch_r->flag_a) == 0) {
+			 	tasklet_schedule(&p_ch_r->tasklet);
+                        }
+
+#ifdef DEBUGMSG
+                        printk(KERN_INFO "%s: process CLAW_START_WRITE exit\n",
+				 dev->name);
+#endif
+#ifdef FUNCTRACE
+			printk(KERN_INFO "%s:%s Exit on line %d\n",
+				dev->name,__FUNCTION__,__LINE__);
+#endif
+			CLAW_DBF_TEXT(4,trace,"StWtExit");
+                        return;
+                default:
+                        printk(KERN_WARNING "%s: wrong selection code - irq "
+				"state=%d\n",dev->name,p_ch->claw_state);
+#ifdef FUNCTRACE
+			printk(KERN_INFO "%s:%s Exit on line %d\n",
+				dev->name,__FUNCTION__,__LINE__);
+#endif
+			CLAW_DBF_TEXT(2,trace,"badIRQ");
+                        return;
+        }
+
+}       /*   end of claw_irq_handler    */
+
+
+/*-------------------------------------------------------------------*
+*       claw_irq_tasklet                                             *
+*                                                                    *
+*--------------------------------------------------------------------*/
+static void
+claw_irq_tasklet ( unsigned long data )
+{
+	struct chbk * p_ch;
+        struct net_device  *dev;
+        struct claw_privbk *       privptr;
+
+	p_ch = (struct chbk *) data;
+        dev = (struct net_device *)p_ch->ndev;
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
+#endif
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: variable p_ch =\n",dev->name);
+        dumpit((char *) p_ch, sizeof(struct chbk));
+#endif
+	CLAW_DBF_TEXT(4,trace,"IRQtask");
+
+        privptr = (struct claw_privbk *) dev->priv;
+
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: bh routine - state-%02x\n" ,
+		dev->name, p_ch->claw_state);
+#endif
+
+        unpack_read(dev);
+        clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
+	CLAW_DBF_TEXT(4,trace,"TskletXt");
+#ifdef FUNCTRACE
+	printk(KERN_INFO "%s:%s Exit on line %d\n",
+		dev->name,__FUNCTION__,__LINE__);
+#endif
+        return;
+}       /*    end of claw_irq_bh    */
+
+/*-------------------------------------------------------------------*
+*       claw_release                                                 *
+*                                                                    *
+*--------------------------------------------------------------------*/
+static int
+claw_release(struct net_device *dev)
+{
+        int                rc;
+        int                i;
+        unsigned long      saveflags;
+        unsigned long      parm;
+        struct claw_privbk *privptr;
+        DECLARE_WAITQUEUE(wait, current);
+        struct ccwbk*             p_this_ccw;
+        struct ccwbk*             p_buf;
+
+	if (!dev)
+                return 0;
+        privptr = (struct claw_privbk *) dev->priv;
+        if (!privptr)
+                return 0;
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(4,trace,"release");
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: variable dev =\n",dev->name);
+        dumpit((char *) dev, sizeof(struct net_device));
+	printk(KERN_INFO "Priv Buffalloc %d\n",privptr->buffs_alloc);
+	printk(KERN_INFO "Priv p_buff_ccw = %p\n",&privptr->p_buff_ccw);
+#endif
+        privptr->release_pend=1;
+        claw_setbit_busy(TB_STOP,dev);
+        for ( i = 1; i >=0 ;  i--) {
+                spin_lock_irqsave(
+			get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
+             /*   del_timer(&privptr->channel[READ].timer);  */
+ 		privptr->channel[i].claw_state = CLAW_STOP;
+                privptr->channel[i].IO_active = 0;
+                parm = (unsigned long) &privptr->channel[i];
+		if (i == WRITE)
+			claw_purge_skb_queue(
+				&privptr->channel[WRITE].collect_queue);
+                rc = ccw_device_halt (privptr->channel[i].cdev, parm);
+	        if (privptr->system_validate_comp==0x00)  /* never opened? */
+                   init_waitqueue_head(&privptr->channel[i].wait);
+                add_wait_queue(&privptr->channel[i].wait, &wait);
+                set_current_state(TASK_INTERRUPTIBLE);
+	        spin_unlock_irqrestore(
+			get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
+	        schedule();
+		set_current_state(TASK_RUNNING);
+	        remove_wait_queue(&privptr->channel[i].wait, &wait);
+	        if (rc != 0) {
+                        ccw_check_return_code(privptr->channel[i].cdev, rc);
+                }
+        }
+	if (privptr->pk_skb != NULL) {
+		dev_kfree_skb(privptr->pk_skb);
+		privptr->pk_skb = NULL;
+	}
+	if(privptr->buffs_alloc != 1) {
+#ifdef FUNCTRACE
+	printk(KERN_INFO "%s:%s Exit on line %d\n",
+		dev->name,__FUNCTION__,__LINE__);
+#endif
+		CLAW_DBF_TEXT(4,trace,"none2fre");
+		return 0;
+	}
+	CLAW_DBF_TEXT(4,trace,"freebufs");
+	if (privptr->p_buff_ccw != NULL) {
+        	free_pages((unsigned long)privptr->p_buff_ccw,
+	        	(int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
+	}
+	CLAW_DBF_TEXT(4,trace,"freeread");
+        if (privptr->p_env->read_size < PAGE_SIZE) {
+	    if (privptr->p_buff_read != NULL) {
+                free_pages((unsigned long)privptr->p_buff_read,
+		      (int)pages_to_order_of_mag(privptr->p_buff_read_num));
+		}
+        }
+        else {
+                p_buf=privptr->p_read_active_first;
+                while (p_buf!=NULL) {
+                        free_pages((unsigned long)p_buf->p_buffer,
+			     (int)pages_to_order_of_mag(
+			     	privptr->p_buff_pages_perread ));
+                        p_buf=p_buf->next;
+                }
+        }
+	 CLAW_DBF_TEXT(4,trace,"freewrit");
+        if (privptr->p_env->write_size < PAGE_SIZE ) {
+                free_pages((unsigned long)privptr->p_buff_write,
+		      (int)pages_to_order_of_mag(privptr->p_buff_write_num));
+        }
+        else {
+                p_buf=privptr->p_write_active_first;
+                while (p_buf!=NULL) {
+                        free_pages((unsigned long)p_buf->p_buffer,
+			      (int)pages_to_order_of_mag(
+			      privptr->p_buff_pages_perwrite ));
+                        p_buf=p_buf->next;
+                }
+        }
+	 CLAW_DBF_TEXT(4,trace,"clearptr");
+	privptr->buffs_alloc = 0;
+        privptr->p_buff_ccw=NULL;
+        privptr->p_buff_read=NULL;
+        privptr->p_buff_write=NULL;
+        privptr->system_validate_comp=0;
+        privptr->release_pend=0;
+        /*      Remove any writes that were pending and reset all reads   */
+        p_this_ccw=privptr->p_read_active_first;
+        while (p_this_ccw!=NULL) {
+                p_this_ccw->header.length=0xffff;
+                p_this_ccw->header.opcode=0xff;
+                p_this_ccw->header.flag=0x00;
+                p_this_ccw=p_this_ccw->next;
+        }
+
+        while (privptr->p_write_active_first!=NULL) {
+                p_this_ccw=privptr->p_write_active_first;
+                p_this_ccw->header.flag=CLAW_PENDING;
+                privptr->p_write_active_first=p_this_ccw->next;
+                p_this_ccw->next=privptr->p_write_free_chain;
+                privptr->p_write_free_chain=p_this_ccw;
+                ++privptr->write_free_count;
+        }
+        privptr->p_write_active_last=NULL;
+        privptr->mtc_logical_link = -1;
+        privptr->mtc_skipping = 1;
+        privptr->mtc_offset=0;
+
+        if (((privptr->channel[READ].last_dstat |
+		privptr->channel[WRITE].last_dstat) &
+		~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
+                printk(KERN_WARNING "%s: channel problems during close - "
+			"read: %02x -  write: %02x\n",
+                dev->name,
+		privptr->channel[READ].last_dstat,
+		privptr->channel[WRITE].last_dstat);
+		 CLAW_DBF_TEXT(2,trace,"badclose");
+        }
+#ifdef FUNCTRACE
+	printk(KERN_INFO "%s:%s Exit on line %d\n",
+		dev->name,__FUNCTION__,__LINE__);
+#endif
+	CLAW_DBF_TEXT(4,trace,"rlsexit");
+        return 0;
+}      /* end of claw_release     */
+
+
+
+/*-------------------------------------------------------------------*
+*       claw_write_retry                                             *
+*                                                                    *
+*--------------------------------------------------------------------*/
+
+static void
+claw_write_retry ( struct chbk *p_ch )
+{
+
+        struct net_device  *dev=p_ch->ndev;
+
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
+        printk(KERN_INFO "claw: variable p_ch =\n");
+        dumpit((char *) p_ch, sizeof(struct chbk));
+#endif
+	CLAW_DBF_TEXT(4,trace,"w_retry");
+        if (p_ch->claw_state == CLAW_STOP) {
+#ifdef FUNCTRACE
+		printk(KERN_INFO "%s:%s Exit on line %d\n",
+			dev->name,__FUNCTION__,__LINE__);
+#endif
+        	return;
+        }
+#ifdef DEBUGMSG
+        printk( KERN_INFO "%s:%s  state-%02x\n" ,
+		dev->name,
+		__FUNCTION__,
+		p_ch->claw_state);
+#endif
+	claw_strt_out_IO( dev );
+#ifdef FUNCTRACE
+	printk(KERN_INFO "%s:%s Exit on line %d\n",
+		dev->name,__FUNCTION__,__LINE__);
+#endif
+	CLAW_DBF_TEXT(4,trace,"rtry_xit");
+        return;
+}      /* end of claw_write_retry      */
+
+
+/*-------------------------------------------------------------------*
+*       claw_write_next                                              *
+*                                                                    *
+*--------------------------------------------------------------------*/
+
+static void
+claw_write_next ( struct chbk * p_ch )
+{
+
+        struct net_device  *dev;
+        struct claw_privbk *privptr=NULL;
+	struct sk_buff *pk_skb;
+	int	rc;
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Enter  \n",p_ch->ndev->name,__FUNCTION__);
+        printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
+        dumpit((char *) p_ch, sizeof(struct chbk));
+#endif
+	CLAW_DBF_TEXT(4,trace,"claw_wrt");
+        if (p_ch->claw_state == CLAW_STOP)
+                return;
+        dev = (struct net_device *) p_ch->ndev;
+	privptr = (struct claw_privbk *) dev->priv;
+        claw_free_wrt_buf( dev );
+	if ((privptr->write_free_count > 0) &&
+	    (skb_queue_len(&p_ch->collect_queue) > 0)) {
+	  	pk_skb = claw_pack_skb(privptr);
+		while (pk_skb != NULL) {
+			rc = claw_hw_tx( pk_skb, dev,1);
+			if (privptr->write_free_count > 0) {
+	   			pk_skb = claw_pack_skb(privptr);
+			} else
+				pk_skb = NULL;
+		}
+	}
+        if (privptr->p_write_active_first!=NULL) {
+                claw_strt_out_IO(dev);
+        }
+
+#ifdef FUNCTRACE
+	printk(KERN_INFO "%s:%s Exit on line %d\n",
+		dev->name,__FUNCTION__,__LINE__);
+#endif
+        return;
+}      /* end of claw_write_next      */
+
+/*-------------------------------------------------------------------*
+*                                                                    *
+*       claw_timer                                                   *
+*--------------------------------------------------------------------*/
+
+static void
+claw_timer ( struct chbk * p_ch )
+{
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Entry\n",p_ch->ndev->name,__FUNCTION__);
+        printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
+        dumpit((char *) p_ch, sizeof(struct chbk));
+#endif
+	CLAW_DBF_TEXT(4,trace,"timer");
+        p_ch->flag |= CLAW_TIMER;
+        wake_up(&p_ch->wait);
+#ifdef FUNCTRACE
+	printk(KERN_INFO "%s:%s Exit on line %d\n",
+		p_ch->ndev->name,__FUNCTION__,__LINE__);
+#endif
+        return;
+}      /* end of claw_timer  */
+
+
+/*
+*
+*       functions
+*/
+
+
+/*-------------------------------------------------------------------*
+*                                                                    *
+*     pages_to_order_of_mag                                          *
+*                                                                    *
+*    takes a number of pages from 1 to 512 and returns the           *
+*    log(num_pages)/log(2) get_free_pages() needs a base 2 order     *
+*    of magnitude get_free_pages() has an upper order of 9           *
+*--------------------------------------------------------------------*/
+
+static int inline
+pages_to_order_of_mag(int num_of_pages)
+{
+	int	order_of_mag=1;		/* assume 2 pages */
+	int	nump=2;
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s Enter pages = %d \n",__FUNCTION__,num_of_pages);
+#endif
+	CLAW_DBF_TEXT_(5,trace,"pages%d",num_of_pages);
+	if (num_of_pages == 1)   {return 0; }  /* magnitude of 0 = 1 page */
+	/* 512 pages = 2Meg on 4k page systems */
+	if (num_of_pages >= 512) {return 9; }
+	/* we have two or more pages order is at least 1 */
+	for (nump=2 ;nump <= 512;nump*=2) {
+	  if (num_of_pages <= nump)
+		  break;
+	  order_of_mag +=1;
+	}
+	if (order_of_mag > 9) { order_of_mag = 9; }  /* I know it's paranoid */
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s Exit on line %d, order = %d\n",
+	__FUNCTION__,__LINE__, order_of_mag);
+#endif
+	CLAW_DBF_TEXT_(5,trace,"mag%d",order_of_mag);
+	return order_of_mag;
+}
+
+/*-------------------------------------------------------------------*
+*                                                                    *
+*     add_claw_reads                                                 *
+*                                                                    *
+*--------------------------------------------------------------------*/
+static int
+add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
+	struct ccwbk* p_last)
+{
+        struct claw_privbk *privptr;
+        struct ccw1  temp_ccw;
+        struct endccw * p_end;
+#ifdef IOTRACE
+        struct ccwbk*  p_buf;
+#endif
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
+#endif
+#ifdef DEBUGMSG
+        printk(KERN_INFO "dev\n");
+        dumpit((char *) dev, sizeof(struct net_device));
+        printk(KERN_INFO "p_first\n");
+        dumpit((char *) p_first, sizeof(struct ccwbk));
+        printk(KERN_INFO "p_last\n");
+        dumpit((char *) p_last, sizeof(struct ccwbk));
+#endif
+	CLAW_DBF_TEXT(4,trace,"addreads");
+        privptr = dev->priv;
+        p_end = privptr->p_end_ccw;
+
+        /* first CCW and last CCW contains a new set of read channel programs
+        *       to apend the running channel programs
+        */
+        if ( p_first==NULL) {
+#ifdef FUNCTRACE
+		printk(KERN_INFO "%s:%s Exit on line %d\n",
+			dev->name,__FUNCTION__,__LINE__);
+#endif
+		CLAW_DBF_TEXT(4,trace,"addexit");
+                return 0;
+        }
+
+        /* set up ending CCW sequence for this segment */
+        if (p_end->read1) {
+                p_end->read1=0x00;    /*  second ending CCW is now active */
+                /*      reset ending CCWs and setup TIC CCWs              */
+                p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
+                p_end->read2_nop2.flags  = CCW_FLAG_SLI | CCW_FLAG_SKIP;
+                p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
+                p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
+                p_end->read2_nop2.cda=0;
+                p_end->read2_nop2.count=1;
+        }
+        else {
+                p_end->read1=0x01;  /* first ending CCW is now active */
+                /*      reset ending CCWs and setup TIC CCWs          */
+                p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
+                p_end->read1_nop2.flags  = CCW_FLAG_SLI | CCW_FLAG_SKIP;
+                p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
+                p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
+                p_end->read1_nop2.cda=0;
+                p_end->read1_nop2.count=1;
+        }
+
+        if ( privptr-> p_read_active_first ==NULL ) {
+#ifdef DEBUGMSG
+                printk(KERN_INFO "%s:%s p_read_active_frist == NULL \n",
+			dev->name,__FUNCTION__);
+                printk(KERN_INFO "%s:%s Read active first/last changed \n",
+			dev->name,__FUNCTION__);
+#endif
+                privptr-> p_read_active_first= p_first;  /*    set new first */
+                privptr-> p_read_active_last = p_last;   /*    set new last  */
+        }
+        else {
+
+#ifdef DEBUGMSG
+                printk(KERN_INFO "%s:%s Read in progress \n",
+		dev->name,__FUNCTION__);
+#endif
+                /* set up TIC ccw  */
+                temp_ccw.cda= (__u32)__pa(&p_first->read);
+                temp_ccw.count=0;
+                temp_ccw.flags=0;
+                temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
+
+
+                if (p_end->read1) {
+
+               /* first set of CCW's is chained to the new read              */
+               /* chain, so the second set is chained to the active chain.   */
+               /* Therefore modify the second set to point to the new        */
+               /* read chain set up TIC CCWs                                 */
+               /* make sure we update the CCW so channel doesn't fetch it    */
+               /* when it's only half done                                   */
+                        memcpy( &p_end->read2_nop2, &temp_ccw ,
+				sizeof(struct ccw1));
+                        privptr->p_read_active_last->r_TIC_1.cda=
+				(__u32)__pa(&p_first->read);
+                        privptr->p_read_active_last->r_TIC_2.cda=
+				(__u32)__pa(&p_first->read);
+                }
+                else {
+                        /* make sure we update the CCW so channel doesn't   */
+			/* fetch it when it is only half done               */
+                        memcpy( &p_end->read1_nop2, &temp_ccw ,
+				sizeof(struct ccw1));
+                        privptr->p_read_active_last->r_TIC_1.cda=
+				(__u32)__pa(&p_first->read);
+                        privptr->p_read_active_last->r_TIC_2.cda=
+				(__u32)__pa(&p_first->read);
+                }
+                /*      chain in new set of blocks                              */
+                privptr->p_read_active_last->next = p_first;
+                privptr->p_read_active_last=p_last;
+        } /* end of if ( privptr-> p_read_active_first ==NULL)  */
+#ifdef IOTRACE
+        printk(KERN_INFO "%s:%s  dump p_last CCW BK \n",dev->name,__FUNCTION__);
+        dumpit((char *)p_last, sizeof(struct ccwbk));
+        printk(KERN_INFO "%s:%s  dump p_end CCW BK \n",dev->name,__FUNCTION__);
+        dumpit((char *)p_end, sizeof(struct endccw));
+
+        printk(KERN_INFO "%s:%s dump p_first CCW BK \n",dev->name,__FUNCTION__);
+        dumpit((char *)p_first, sizeof(struct ccwbk));
+        printk(KERN_INFO "%s:%s Dump Active CCW chain \n",
+		dev->name,__FUNCTION__);
+        p_buf=privptr->p_read_active_first;
+        while (p_buf!=NULL) {
+                dumpit((char *)p_buf, sizeof(struct ccwbk));
+                p_buf=p_buf->next;
+        }
+#endif
+#ifdef FUNCTRACE
+	printk(KERN_INFO "%s:%s Exit on line %d\n",
+		dev->name,__FUNCTION__,__LINE__);
+#endif
+	CLAW_DBF_TEXT(4,trace,"addexit");
+        return 0;
+}    /*     end of add_claw_reads   */
+
+/*-------------------------------------------------------------------*
+ *   ccw_check_return_code                                           *
+ *                                                                   *
+ *-------------------------------------------------------------------*/
+
+static void inline
+ccw_check_return_code(struct ccw_device *cdev, int return_code)
+{
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s: %s() > enter  \n",
+		cdev->dev.bus_id,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(4,trace,"ccwret");
+#ifdef DEBUGMSG
+        printk(KERN_INFO "variable cdev =\n");
+        dumpit((char *) cdev, sizeof(struct ccw_device));
+        printk(KERN_INFO "variable return_code = %d\n",return_code);
+#endif
+        if (return_code != 0) {
+                switch (return_code) {
+                        case -EBUSY:
+                                printk(KERN_INFO "%s: Busy !\n",
+					cdev->dev.bus_id);
+                                break;
+                        case -ENODEV:
+                                printk(KERN_EMERG "%s: Missing device called "
+					"for IO ENODEV\n", cdev->dev.bus_id);
+                                break;
+                        case -EIO:
+                                printk(KERN_EMERG "%s: Status pending... EIO \n",
+					cdev->dev.bus_id);
+                                break;
+			case -EINVAL:
+                                printk(KERN_EMERG "%s: Invalid Dev State EINVAL \n",
+					cdev->dev.bus_id);
+                                break;
+                        default:
+                                printk(KERN_EMERG "%s: Unknown error in "
+				 "Do_IO %d\n",cdev->dev.bus_id, return_code);
+                }
+        }
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s: %s() > exit on line %d\n",
+		cdev->dev.bus_id,__FUNCTION__,__LINE__);
+#endif
+	CLAW_DBF_TEXT(4,trace,"ccwret");
+}    /*    end of ccw_check_return_code   */
+
+/*-------------------------------------------------------------------*
+*       ccw_check_unit_check                                         *
+*--------------------------------------------------------------------*/
+
+static void inline
+ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
+{
+	struct net_device *dev = p_ch->ndev;
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
+#endif
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: variable dev =\n",dev->name);
+        dumpit((char *)dev, sizeof(struct net_device));
+        printk(KERN_INFO "%s: variable sense =\n",dev->name);
+        dumpit((char *)&sense, 2);
+#endif
+	CLAW_DBF_TEXT(4,trace,"unitchek");
+
+        printk(KERN_INFO "%s: Unit Check with sense byte:0x%04x\n",
+                dev->name, sense);
+
+        if (sense & 0x40) {
+                if (sense & 0x01) {
+                        printk(KERN_WARNING "%s: Interface disconnect or "
+				"Selective reset "
+			       	"occurred (remote side)\n", dev->name);
+                }
+                else {
+                        printk(KERN_WARNING "%s: System reset occured"
+				" (remote side)\n", dev->name);
+                }
+        }
+        else if (sense & 0x20) {
+                if (sense & 0x04) {
+                        printk(KERN_WARNING "%s: Data-streaming "
+				"timeout)\n", dev->name);
+                }
+                else  {
+                        printk(KERN_WARNING "%s: Data-transfer parity"
+				" error\n", dev->name);
+                }
+        }
+        else if (sense & 0x10) {
+                if (sense & 0x20) {
+                        printk(KERN_WARNING "%s: Hardware malfunction "
+				"(remote side)\n", dev->name);
+                }
+                else {
+                        printk(KERN_WARNING "%s: read-data parity error "
+				"(remote side)\n", dev->name);
+                }
+        }
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s: %s() exit on line %d\n",
+		dev->name,__FUNCTION__,__LINE__);
+#endif
+}   /*    end of ccw_check_unit_check    */
+
+
+
+/*-------------------------------------------------------------------*
+* Dump buffer format                                                 *
+*                                                                    *
+*--------------------------------------------------------------------*/
+#ifdef DEBUG
+static void
+dumpit(char* buf, int len)
+{
+
+        __u32      ct, sw, rm, dup;
+        char       *ptr, *rptr;
+        char       tbuf[82], tdup[82];
+#if (CONFIG_ARCH_S390X)
+        char       addr[22];
+#else
+        char       addr[12];
+#endif
+        char       boff[12];
+        char       bhex[82], duphex[82];
+        char       basc[40];
+
+        sw  = 0;
+        rptr =ptr=buf;
+        rm  = 16;
+        duphex[0]  = 0x00;
+        dup = 0;
+        for ( ct=0; ct < len; ct++, ptr++, rptr++ )  {
+                if (sw == 0) {
+#if (CONFIG_ARCH_S390X)
+                        sprintf(addr, "%16.16lX",(unsigned long)rptr);
+#else
+                        sprintf(addr, "%8.8X",(__u32)rptr);
+#endif
+                        sprintf(boff, "%4.4X", (__u32)ct);
+                        bhex[0] = '\0';
+                        basc[0] = '\0';
+                }
+                if ((sw == 4) || (sw == 12)) {
+                        strcat(bhex, " ");
+                }
+                if (sw == 8) {
+                        strcat(bhex, "  ");
+                }
+#if (CONFIG_ARCH_S390X)
+                sprintf(tbuf,"%2.2lX", (unsigned long)*ptr);
+#else
+                sprintf(tbuf,"%2.2X", (__u32)*ptr);
+#endif
+                tbuf[2] = '\0';
+                strcat(bhex, tbuf);
+                if ((0!=isprint(*ptr)) && (*ptr >= 0x20)) {
+                        basc[sw] = *ptr;
+                }
+                else {
+                        basc[sw] = '.';
+                }
+                basc[sw+1] = '\0';
+                sw++;
+                rm--;
+                if (sw==16) {
+                        if ((strcmp(duphex, bhex)) !=0) {
+                                if (dup !=0) {
+					sprintf(tdup,"Duplicate as above to"
+						" %s", addr);
+                                        printk( KERN_INFO "                 "
+						"   --- %s ---\n",tdup);
+                                }
+                                printk( KERN_INFO "   %s (+%s) : %s  [%s]\n",
+					 addr, boff, bhex, basc);
+                                dup = 0;
+                                strcpy(duphex, bhex);
+                        }
+                        else {
+                                dup++;
+                        }
+                        sw = 0;
+                        rm = 16;
+                }
+        }  /* endfor */
+
+        if (sw != 0) {
+                for ( ; rm > 0; rm--, sw++ ) {
+                        if ((sw==4) || (sw==12)) strcat(bhex, " ");
+                        if (sw==8)               strcat(bhex, "  ");
+                        strcat(bhex, "  ");
+                        strcat(basc, " ");
+                }
+                if (dup !=0) {
+                        sprintf(tdup,"Duplicate as above to %s", addr);
+                        printk( KERN_INFO "                    --- %s ---\n",
+				tdup);
+                }
+                printk( KERN_INFO "   %s (+%s) : %s  [%s]\n",
+			addr, boff, bhex, basc);
+        }
+        else {
+                if (dup >=1) {
+                        sprintf(tdup,"Duplicate as above to %s", addr);
+                        printk( KERN_INFO "                    --- %s ---\n",
+				tdup);
+                }
+                if (dup !=0) {
+                        printk( KERN_INFO "   %s (+%s) : %s  [%s]\n",
+				addr, boff, bhex, basc);
+                }
+        }
+        return;
+
+}   /*   end of dumpit  */
+#endif
+
+/*-------------------------------------------------------------------*
+*               find_link                                            *
+*--------------------------------------------------------------------*/
+static int
+find_link(struct net_device *dev, char *host_name, char *ws_name )
+{
+	struct claw_privbk *privptr;
+	struct claw_env *p_env;
+	int    rc=0;
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s > enter  \n",dev->name,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(2,setup,"findlink");
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: variable dev = \n",dev->name);
+        dumpit((char *) dev, sizeof(struct net_device));
+        printk(KERN_INFO "%s: variable host_name = %s\n",dev->name, host_name);
+        printk(KERN_INFO "%s: variable ws_name = %s\n",dev->name, ws_name);
+#endif
+        privptr=dev->priv;
+        p_env=privptr->p_env;
+	switch (p_env->packing)
+	{
+		case  PACKING_ASK:
+			if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
+			    (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
+        	             rc = EINVAL;
+			break;
+		case  DO_PACKED:
+		case  PACK_SEND:
+			if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
+			    (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
+        	        	rc = EINVAL;
+			break;
+		default:
+	       		if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
+		    	    (memcmp(p_env->api_type , ws_name, 8)!=0))
+        	        	rc = EINVAL;
+			break;
+	}
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Exit on line %d\n",
+		dev->name,__FUNCTION__,__LINE__);
+#endif
+        return 0;
+}    /*    end of find_link    */
+
+/*-------------------------------------------------------------------*
+ *   claw_hw_tx                                                      *
+ *                                                                   *
+ *                                                                   *
+ *-------------------------------------------------------------------*/
+
+static int
+claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
+{
+        int                             rc=0;
+        struct claw_privbk 		*privptr;
+        struct ccwbk           *p_this_ccw;
+        struct ccwbk           *p_first_ccw;
+        struct ccwbk           *p_last_ccw;
+        __u32                           numBuffers;
+        signed long                     len_of_data;
+        unsigned long                   bytesInThisBuffer;
+        unsigned char                   *pDataAddress;
+        struct endccw                   *pEnd;
+        struct ccw1                     tempCCW;
+        struct chbk                     *p_ch;
+	struct claw_env			*p_env;
+        int                             lock;
+	struct clawph			*pk_head;
+	struct chbk			*ch;
+#ifdef IOTRACE
+        struct ccwbk                   *p_buf;
+#endif
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(4,trace,"hw_tx");
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: variable dev skb =\n",dev->name);
+        dumpit((char *) skb, sizeof(struct sk_buff));
+        printk(KERN_INFO "%s: variable dev =\n",dev->name);
+        dumpit((char *) dev, sizeof(struct net_device));
+        printk(KERN_INFO "%s: variable linkid = %ld\n",dev->name,linkid);
+#endif
+        privptr = (struct claw_privbk *) (dev->priv);
+        p_ch=(struct chbk *)&privptr->channel[WRITE];
+	p_env =privptr->p_env;
+#ifdef IOTRACE
+        printk(KERN_INFO "%s: %s() dump sk_buff  \n",dev->name,__FUNCTION__);
+        dumpit((char *)skb ,sizeof(struct sk_buff));
+#endif
+	claw_free_wrt_buf(dev);	/* Clean up free chain if posible */
+        /*  scan the write queue to free any completed write packets   */
+        p_first_ccw=NULL;
+        p_last_ccw=NULL;
+	if ((p_env->packing >= PACK_SEND) &&
+       	    (skb->cb[1] != 'P')) {
+		skb_push(skb,sizeof(struct clawph));
+		pk_head=(struct clawph *)skb->data;
+		pk_head->len=skb->len-sizeof(struct clawph);
+		if (pk_head->len%4)  {
+			pk_head->len+= 4-(pk_head->len%4);
+			skb_pad(skb,4-(pk_head->len%4));
+			skb_put(skb,4-(pk_head->len%4));
+		}
+		if (p_env->packing == DO_PACKED)
+			pk_head->link_num = linkid;
+		else
+			pk_head->link_num = 0;
+		pk_head->flag = 0x00;
+		skb_pad(skb,4);
+		skb->cb[1] = 'P';
+	}
+        if (linkid == 0) {
+        	if (claw_check_busy(dev)) {
+                	if (privptr->write_free_count!=0) {
+                                claw_clear_busy(dev);
+                        }
+                        else {
+                                claw_strt_out_IO(dev );
+                                claw_free_wrt_buf( dev );
+                                if (privptr->write_free_count==0) {
+#ifdef IOTRACE
+                                	printk(KERN_INFO "%s: "
+					   "(claw_check_busy) no free write "
+					   "buffers\n", dev->name);
+#endif
+					ch = &privptr->channel[WRITE];
+					atomic_inc(&skb->users);
+					skb_queue_tail(&ch->collect_queue, skb);
+                                	goto Done;
+                                }
+                                else {
+                                	claw_clear_busy(dev);
+                                }
+                        }
+                }
+                /*  tx lock  */
+                if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
+#ifdef DEBUGMSG
+                        printk(KERN_INFO "%s:  busy  (claw_test_and_setbit_"
+				"busy)\n", dev->name);
+#endif
+			ch = &privptr->channel[WRITE];
+			atomic_inc(&skb->users);
+			skb_queue_tail(&ch->collect_queue, skb);
+                        claw_strt_out_IO(dev );
+                        rc=-EBUSY;
+                        goto Done2;
+                }
+        }
+        /*      See how many write buffers are required to hold this data */
+        numBuffers= ( skb->len + privptr->p_env->write_size - 1) /
+			( privptr->p_env->write_size);
+
+        /*      If that number of buffers isn't available, give up for now */
+        if (privptr->write_free_count < numBuffers ||
+            privptr->p_write_free_chain == NULL ) {
+
+                claw_setbit_busy(TB_NOBUFFER,dev);
+
+#ifdef DEBUGMSG
+                printk(KERN_INFO "%s:  busy  (claw_setbit_busy"
+			"(TB_NOBUFFER))\n", dev->name);
+                printk(KERN_INFO "       free_count: %d, numBuffers : %d\n",
+			(int)privptr->write_free_count,(int) numBuffers );
+#endif
+		ch = &privptr->channel[WRITE];
+		atomic_inc(&skb->users);
+		skb_queue_tail(&ch->collect_queue, skb);
+		CLAW_DBF_TEXT(2,trace,"clawbusy");
+                goto Done2;
+        }
+        pDataAddress=skb->data;
+        len_of_data=skb->len;
+
+        while (len_of_data > 0) {
+#ifdef DEBUGMSG
+                printk(KERN_INFO "%s: %s() length-of-data is %ld \n",
+			dev->name ,__FUNCTION__,len_of_data);
+                dumpit((char *)pDataAddress ,64);
+#endif
+                p_this_ccw=privptr->p_write_free_chain;  /* get a block */
+		if (p_this_ccw == NULL) { /* lost the race */
+			ch = &privptr->channel[WRITE];
+			atomic_inc(&skb->users);
+			skb_queue_tail(&ch->collect_queue, skb);
+			goto Done2;
+		}
+                privptr->p_write_free_chain=p_this_ccw->next;
+                p_this_ccw->next=NULL;
+                --privptr->write_free_count; /* -1 */
+                bytesInThisBuffer=len_of_data;
+                memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
+                len_of_data-=bytesInThisBuffer;
+                pDataAddress+=(unsigned long)bytesInThisBuffer;
+                /*      setup write CCW         */
+                p_this_ccw->write.cmd_code = (linkid * 8) +1;
+                if (len_of_data>0) {
+                        p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
+                }
+                p_this_ccw->write.count=bytesInThisBuffer;
+                /*      now add to end of this chain    */
+                if (p_first_ccw==NULL)    {
+                        p_first_ccw=p_this_ccw;
+                }
+                if (p_last_ccw!=NULL) {
+                        p_last_ccw->next=p_this_ccw;
+                        /*      set up TIC ccws         */
+                        p_last_ccw->w_TIC_1.cda=
+				(__u32)__pa(&p_this_ccw->write);
+                }
+                p_last_ccw=p_this_ccw;      /* save new last block */
+#ifdef IOTRACE
+		printk(KERN_INFO "%s: %s() > CCW and Buffer %ld bytes long \n",
+			dev->name,__FUNCTION__,bytesInThisBuffer);
+                dumpit((char *)p_this_ccw, sizeof(struct ccwbk));
+                dumpit((char *)p_this_ccw->p_buffer, 64);
+#endif
+        }
+
+        /*      FirstCCW and LastCCW now contain a new set of write channel
+        *       programs to append to the running channel program
+        */
+
+        if (p_first_ccw!=NULL) {
+                /*      setup ending ccw sequence for this segment              */
+                pEnd=privptr->p_end_ccw;
+                if (pEnd->write1) {
+                        pEnd->write1=0x00;   /* second end ccw is now active */
+                        /*      set up Tic CCWs         */
+                        p_last_ccw->w_TIC_1.cda=
+				(__u32)__pa(&pEnd->write2_nop1);
+                        pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
+                        pEnd->write2_nop2.flags    =
+				CCW_FLAG_SLI | CCW_FLAG_SKIP;
+                        pEnd->write2_nop2.cda=0;
+                        pEnd->write2_nop2.count=1;
+                }
+                else {  /*  end of if (pEnd->write1)*/
+                        pEnd->write1=0x01;   /* first end ccw is now active */
+                        /*      set up Tic CCWs         */
+                        p_last_ccw->w_TIC_1.cda=
+				(__u32)__pa(&pEnd->write1_nop1);
+                        pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
+                        pEnd->write1_nop2.flags    =
+				CCW_FLAG_SLI | CCW_FLAG_SKIP;
+                        pEnd->write1_nop2.cda=0;
+                        pEnd->write1_nop2.count=1;
+                }  /* end if if (pEnd->write1) */
+
+
+                if (privptr->p_write_active_first==NULL ) {
+                        privptr->p_write_active_first=p_first_ccw;
+                        privptr->p_write_active_last=p_last_ccw;
+                }
+                else {
+
+                        /*      set up Tic CCWs         */
+
+                        tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
+                        tempCCW.count=0;
+                        tempCCW.flags=0;
+                        tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
+
+                        if (pEnd->write1) {
+
+                 /*
+                 * first set of ending CCW's is chained to the new write
+                 * chain, so the second set is chained to the active chain
+                 * Therefore modify the second set to point the new write chain.
+                 * make sure we update the CCW atomically
+                 * so channel does not fetch it when it's only half done
+                 */
+                                memcpy( &pEnd->write2_nop2, &tempCCW ,
+					sizeof(struct ccw1));
+                                privptr->p_write_active_last->w_TIC_1.cda=
+					(__u32)__pa(&p_first_ccw->write);
+                        }
+                        else {
+
+                        /*make sure we update the CCW atomically
+                         *so channel does not fetch it when it's only half done
+                         */
+                                memcpy(&pEnd->write1_nop2, &tempCCW ,
+					sizeof(struct ccw1));
+                                privptr->p_write_active_last->w_TIC_1.cda=
+				        (__u32)__pa(&p_first_ccw->write);
+
+                        } /* end if if (pEnd->write1) */
+
+                        privptr->p_write_active_last->next=p_first_ccw;
+                        privptr->p_write_active_last=p_last_ccw;
+                }
+
+        } /* endif (p_first_ccw!=NULL)  */
+
+
+#ifdef IOTRACE
+        printk(KERN_INFO "%s: %s() >  Dump Active CCW chain \n",
+		dev->name,__FUNCTION__);
+        p_buf=privptr->p_write_active_first;
+        while (p_buf!=NULL) {
+                dumpit((char *)p_buf, sizeof(struct ccwbk));
+                p_buf=p_buf->next;
+        }
+        p_buf=(struct ccwbk*)privptr->p_end_ccw;
+        dumpit((char *)p_buf, sizeof(struct endccw));
+#endif
+        dev_kfree_skb(skb);
+	if (linkid==0) {
+        	lock=LOCK_NO;
+        }
+        else  {
+                lock=LOCK_YES;
+        }
+        claw_strt_out_IO(dev );
+        /*      if write free count is zero , set NOBUFFER       */
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: %s() > free_count is %d\n",
+		dev->name,__FUNCTION__,
+		(int) privptr->write_free_count );
+#endif
+	if (privptr->write_free_count==0) {
+		claw_setbit_busy(TB_NOBUFFER,dev);
+        }
+Done2:
+	claw_clearbit_busy(TB_TX,dev);
+Done:
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s: %s() > exit on line %d, rc = %d \n",
+		dev->name,__FUNCTION__,__LINE__, rc);
+#endif
+	return(rc);
+}    /*    end of claw_hw_tx    */
+
+/*-------------------------------------------------------------------*
+*                                                                    *
+*     init_ccw_bk                                                    *
+*                                                                    *
+*--------------------------------------------------------------------*/
+
+static int
+init_ccw_bk(struct net_device *dev)
+{
+
+        __u32   ccw_blocks_required;
+        __u32   ccw_blocks_perpage;
+        __u32   ccw_pages_required;
+        __u32   claw_reads_perpage=1;
+        __u32   claw_read_pages;
+        __u32   claw_writes_perpage=1;
+        __u32   claw_write_pages;
+        void    *p_buff=NULL;
+        struct ccwbk*p_free_chain;
+	struct ccwbk*p_buf;
+	struct ccwbk*p_last_CCWB;
+	struct ccwbk*p_first_CCWB;
+        struct endccw *p_endccw=NULL;
+        addr_t  real_address;
+        struct claw_privbk *privptr=dev->priv;
+        struct clawh *pClawH=NULL;
+        addr_t   real_TIC_address;
+        int i,j;
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s: %s() enter  \n",dev->name,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(4,trace,"init_ccw");
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: variable dev =\n",dev->name);
+        dumpit((char *) dev, sizeof(struct net_device));
+#endif
+
+        /*  initialize  statistics field */
+        privptr->active_link_ID=0;
+        /*  initialize  ccwbk pointers  */
+        privptr->p_write_free_chain=NULL;   /* pointer to free ccw chain*/
+        privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
+        privptr->p_write_active_last=NULL;  /* pointer to the last write ccw*/
+        privptr->p_read_active_first=NULL;  /* pointer to the first read ccw*/
+        privptr->p_read_active_last=NULL;   /* pointer to the last read ccw */
+        privptr->p_end_ccw=NULL;            /* pointer to ending ccw        */
+        privptr->p_claw_signal_blk=NULL;    /* pointer to signal block      */
+	privptr->buffs_alloc = 0;
+        memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
+        memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
+        /*  initialize  free write ccwbk counter  */
+        privptr->write_free_count=0;  /* number of free bufs on write chain */
+        p_last_CCWB = NULL;
+        p_first_CCWB= NULL;
+        /*
+        *  We need 1 CCW block for each read buffer, 1 for each
+        *  write buffer, plus 1 for ClawSignalBlock
+        */
+        ccw_blocks_required =
+		privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: %s() "
+		"ccw_blocks_required=%d\n",
+		dev->name,__FUNCTION__,
+		ccw_blocks_required);
+        printk(KERN_INFO "%s: %s() "
+		"PAGE_SIZE=0x%x\n",
+		dev->name,__FUNCTION__,
+		(unsigned int)PAGE_SIZE);
+        printk(KERN_INFO "%s: %s() > "
+		"PAGE_MASK=0x%x\n",
+		dev->name,__FUNCTION__,
+		(unsigned int)PAGE_MASK);
+#endif
+        /*
+        * compute number of CCW blocks that will fit in a page
+        */
+        ccw_blocks_perpage= PAGE_SIZE /  CCWBK_SIZE;
+        ccw_pages_required=
+		(ccw_blocks_required+ccw_blocks_perpage -1) /
+			 ccw_blocks_perpage;
+
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: %s() > ccw_blocks_perpage=%d\n",
+		dev->name,__FUNCTION__,
+		ccw_blocks_perpage);
+        printk(KERN_INFO "%s: %s() > ccw_pages_required=%d\n",
+		dev->name,__FUNCTION__,
+		ccw_pages_required);
+#endif
+        /*
+         *  read and write sizes are set by 2 constants in claw.h
+	 *  4k and 32k.  Unpacked values other than 4k are not going to
+	 * provide good performance. With packing buffers support 32k
+	 * buffers are used.
+         */
+        if (privptr->p_env->read_size < PAGE_SIZE) {
+            claw_reads_perpage= PAGE_SIZE / privptr->p_env->read_size;
+            claw_read_pages= (privptr->p_env->read_buffers +
+	    	claw_reads_perpage -1) / claw_reads_perpage;
+         }
+         else {       /* > or equal  */
+            privptr->p_buff_pages_perread=
+	    	(privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
+            claw_read_pages=
+	    	privptr->p_env->read_buffers * privptr->p_buff_pages_perread;
+         }
+        if (privptr->p_env->write_size < PAGE_SIZE) {
+            claw_writes_perpage=
+	    	PAGE_SIZE / privptr->p_env->write_size;
+            claw_write_pages=
+	    	(privptr->p_env->write_buffers + claw_writes_perpage -1) /
+			claw_writes_perpage;
+
+        }
+        else {      /* >  or equal  */
+            privptr->p_buff_pages_perwrite=
+	    	 (privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
+            claw_write_pages=
+	     	privptr->p_env->write_buffers * privptr->p_buff_pages_perwrite;
+        }
+#ifdef DEBUGMSG
+        if (privptr->p_env->read_size < PAGE_SIZE) {
+            printk(KERN_INFO "%s: %s() reads_perpage=%d\n",
+	    	dev->name,__FUNCTION__,
+		claw_reads_perpage);
+        }
+        else {
+            printk(KERN_INFO "%s: %s() pages_perread=%d\n",
+	    	dev->name,__FUNCTION__,
+		privptr->p_buff_pages_perread);
+        }
+        printk(KERN_INFO "%s: %s() read_pages=%d\n",
+		dev->name,__FUNCTION__,
+		claw_read_pages);
+        if (privptr->p_env->write_size < PAGE_SIZE) {
+            printk(KERN_INFO "%s: %s() writes_perpage=%d\n",
+	    	dev->name,__FUNCTION__,
+		claw_writes_perpage);
+        }
+        else {
+            printk(KERN_INFO "%s: %s() pages_perwrite=%d\n",
+	    	dev->name,__FUNCTION__,
+		privptr->p_buff_pages_perwrite);
+        }
+        printk(KERN_INFO "%s: %s() write_pages=%d\n",
+		dev->name,__FUNCTION__,
+		claw_write_pages);
+#endif
+
+
+        /*
+        *               allocate ccw_pages_required
+        */
+        if (privptr->p_buff_ccw==NULL) {
+                privptr->p_buff_ccw=
+			(void *)__get_free_pages(__GFP_DMA,
+		        (int)pages_to_order_of_mag(ccw_pages_required ));
+                if (privptr->p_buff_ccw==NULL) {
+                        printk(KERN_INFO "%s: %s()  "
+				"__get_free_pages for CCWs failed : "
+				"pages is %d\n",
+                                dev->name,__FUNCTION__,
+				ccw_pages_required );
+#ifdef FUNCTRACE
+                        printk(KERN_INFO "%s: %s() > "
+				"exit on line %d, rc = ENOMEM\n",
+				dev->name,__FUNCTION__,
+				 __LINE__);
+#endif
+                        return -ENOMEM;
+                }
+                privptr->p_buff_ccw_num=ccw_pages_required;
+        }
+        memset(privptr->p_buff_ccw, 0x00,
+		privptr->p_buff_ccw_num * PAGE_SIZE);
+
+        /*
+        *               obtain ending ccw block address
+        *
+        */
+        privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
+        real_address  = (__u32)__pa(privptr->p_end_ccw);
+        /*                              Initialize ending CCW block       */
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: %s() begin initialize ending CCW blocks\n",
+		dev->name,__FUNCTION__);
+#endif
+
+        p_endccw=privptr->p_end_ccw;
+        p_endccw->real=real_address;
+        p_endccw->write1=0x00;
+        p_endccw->read1=0x00;
+
+        /*      write1_nop1                                     */
+        p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
+        p_endccw->write1_nop1.flags       = CCW_FLAG_SLI | CCW_FLAG_CC;
+        p_endccw->write1_nop1.count       = 1;
+        p_endccw->write1_nop1.cda         = 0;
+
+        /*      write1_nop2                                     */
+        p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
+        p_endccw->write1_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
+        p_endccw->write1_nop2.count      = 1;
+        p_endccw->write1_nop2.cda        = 0;
+
+        /*      write2_nop1                                     */
+        p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
+        p_endccw->write2_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
+        p_endccw->write2_nop1.count        = 1;
+        p_endccw->write2_nop1.cda          = 0;
+
+        /*      write2_nop2                                     */
+        p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
+        p_endccw->write2_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
+        p_endccw->write2_nop2.count        = 1;
+        p_endccw->write2_nop2.cda          = 0;
+
+        /*      read1_nop1                                      */
+        p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
+        p_endccw->read1_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
+        p_endccw->read1_nop1.count        = 1;
+        p_endccw->read1_nop1.cda          = 0;
+
+        /*      read1_nop2                                      */
+        p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
+        p_endccw->read1_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
+        p_endccw->read1_nop2.count        = 1;
+        p_endccw->read1_nop2.cda          = 0;
+
+        /*      read2_nop1                                      */
+        p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
+        p_endccw->read2_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
+        p_endccw->read2_nop1.count        = 1;
+        p_endccw->read2_nop1.cda          = 0;
+
+        /*      read2_nop2                                      */
+        p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
+        p_endccw->read2_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
+        p_endccw->read2_nop2.count        = 1;
+        p_endccw->read2_nop2.cda          = 0;
+
+#ifdef IOTRACE
+        printk(KERN_INFO "%s: %s() dump claw ending CCW BK \n",
+		dev->name,__FUNCTION__);
+        dumpit((char *)p_endccw, sizeof(struct endccw));
+#endif
+
+        /*
+        *                               Build a chain of CCWs
+        *
+        */
+
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: %s()  Begin build a chain of CCW buffer \n",
+		dev->name,__FUNCTION__);
+#endif
+        p_buff=privptr->p_buff_ccw;
+
+        p_free_chain=NULL;
+        for (i=0 ; i < ccw_pages_required; i++ ) {
+                real_address  = (__u32)__pa(p_buff);
+                p_buf=p_buff;
+                for (j=0 ; j < ccw_blocks_perpage ; j++) {
+                        p_buf->next  = p_free_chain;
+                        p_free_chain = p_buf;
+                        p_buf->real=(__u32)__pa(p_buf);
+                        ++p_buf;
+                }
+                p_buff+=PAGE_SIZE;
+        }
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: %s() "
+		"End build a chain of CCW buffer \n",
+			dev->name,__FUNCTION__);
+        p_buf=p_free_chain;
+        while (p_buf!=NULL) {
+                dumpit((char *)p_buf, sizeof(struct ccwbk));
+                p_buf=p_buf->next;
+        }
+#endif
+
+        /*
+        *                               Initialize ClawSignalBlock
+        *
+        */
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: %s() "
+		"Begin initialize ClawSignalBlock \n",
+		dev->name,__FUNCTION__);
+#endif
+        if (privptr->p_claw_signal_blk==NULL) {
+                privptr->p_claw_signal_blk=p_free_chain;
+                p_free_chain=p_free_chain->next;
+                pClawH=(struct clawh *)privptr->p_claw_signal_blk;
+                pClawH->length=0xffff;
+                pClawH->opcode=0xff;
+                pClawH->flag=CLAW_BUSY;
+        }
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: %s() >  End initialize "
+	 	"ClawSignalBlock\n",
+		dev->name,__FUNCTION__);
+        dumpit((char *)privptr->p_claw_signal_blk, sizeof(struct ccwbk));
+#endif
+
+        /*
+        *               allocate write_pages_required and add to free chain
+        */
+        if (privptr->p_buff_write==NULL) {
+            if (privptr->p_env->write_size < PAGE_SIZE) {
+                privptr->p_buff_write=
+			(void *)__get_free_pages(__GFP_DMA,
+			(int)pages_to_order_of_mag(claw_write_pages ));
+                if (privptr->p_buff_write==NULL) {
+                        printk(KERN_INFO "%s: %s() __get_free_pages for write"
+				" bufs failed : get is for %d pages\n",
+                                dev->name,__FUNCTION__,claw_write_pages );
+                        free_pages((unsigned long)privptr->p_buff_ccw,
+			   (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
+                        privptr->p_buff_ccw=NULL;
+#ifdef FUNCTRACE
+                        printk(KERN_INFO "%s: %s() > exit on line %d,"
+			 	"rc = ENOMEM\n",
+				dev->name,__FUNCTION__,__LINE__);
+#endif
+                        return -ENOMEM;
+                }
+                /*
+                *                               Build CLAW write free chain
+                *
+                */
+
+                memset(privptr->p_buff_write, 0x00,
+			ccw_pages_required * PAGE_SIZE);
+#ifdef DEBUGMSG
+                printk(KERN_INFO "%s: %s() Begin build claw write free "
+			"chain \n",dev->name,__FUNCTION__);
+#endif
+                privptr->p_write_free_chain=NULL;
+
+                p_buff=privptr->p_buff_write;
+
+                for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
+                        p_buf        = p_free_chain;      /*  get a CCW */
+                        p_free_chain = p_buf->next;
+                        p_buf->next  =privptr->p_write_free_chain;
+                        privptr->p_write_free_chain = p_buf;
+                        p_buf-> p_buffer	= (struct clawbuf *)p_buff;
+                        p_buf-> write.cda       = (__u32)__pa(p_buff);
+                        p_buf-> write.flags     = CCW_FLAG_SLI | CCW_FLAG_CC;
+                        p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
+                        p_buf-> w_read_FF.flags   = CCW_FLAG_SLI | CCW_FLAG_CC;
+                        p_buf-> w_read_FF.count   = 1;
+                        p_buf-> w_read_FF.cda     =
+				(__u32)__pa(&p_buf-> header.flag);
+                        p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
+                        p_buf-> w_TIC_1.flags      = 0;
+                        p_buf-> w_TIC_1.count      = 0;
+
+                        if (((unsigned long)p_buff+privptr->p_env->write_size) >=
+			   ((unsigned long)(p_buff+2*
+				(privptr->p_env->write_size) -1) & PAGE_MASK)) {
+                        p_buff= p_buff+privptr->p_env->write_size;
+                        }
+                }
+           }
+           else      /*  Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
+           {
+               privptr->p_write_free_chain=NULL;
+               for (i = 0; i< privptr->p_env->write_buffers ; i++) {
+                   p_buff=(void *)__get_free_pages(__GFP_DMA,
+		        (int)pages_to_order_of_mag(
+			privptr->p_buff_pages_perwrite) );
+#ifdef IOTRACE
+                   printk(KERN_INFO "%s:%s __get_free_pages "
+		    "for writes buf: get for %d pages\n",
+		    dev->name,__FUNCTION__,
+		    privptr->p_buff_pages_perwrite);
+#endif
+                   if (p_buff==NULL) {
+                        printk(KERN_INFO "%s:%s __get_free_pages"
+			 	"for writes buf failed : get is for %d pages\n",
+				dev->name,
+				__FUNCTION__,
+				privptr->p_buff_pages_perwrite );
+                        free_pages((unsigned long)privptr->p_buff_ccw,
+			      (int)pages_to_order_of_mag(
+			      		privptr->p_buff_ccw_num));
+                        privptr->p_buff_ccw=NULL;
+			p_buf=privptr->p_buff_write;
+                        while (p_buf!=NULL) {
+                                free_pages((unsigned long)
+					p_buf->p_buffer,
+					(int)pages_to_order_of_mag(
+					privptr->p_buff_pages_perwrite));
+                                p_buf=p_buf->next;
+                        }
+#ifdef FUNCTRACE
+                        printk(KERN_INFO "%s: %s exit on line %d, rc = ENOMEM\n",
+			dev->name,
+			__FUNCTION__,
+			__LINE__);
+#endif
+                        return -ENOMEM;
+                   }  /* Error on get_pages   */
+                   memset(p_buff, 0x00, privptr->p_env->write_size );
+                   p_buf         = p_free_chain;
+                   p_free_chain  = p_buf->next;
+                   p_buf->next   = privptr->p_write_free_chain;
+                   privptr->p_write_free_chain = p_buf;
+                   privptr->p_buff_write = p_buf;
+                   p_buf->p_buffer=(struct clawbuf *)p_buff;
+                   p_buf-> write.cda     = (__u32)__pa(p_buff);
+                   p_buf-> write.flags   = CCW_FLAG_SLI | CCW_FLAG_CC;
+                   p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
+                   p_buf-> w_read_FF.flags    = CCW_FLAG_SLI | CCW_FLAG_CC;
+                   p_buf-> w_read_FF.count    = 1;
+                   p_buf-> w_read_FF.cda      =
+			(__u32)__pa(&p_buf-> header.flag);
+                   p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
+                   p_buf-> w_TIC_1.flags   = 0;
+                   p_buf-> w_TIC_1.count   = 0;
+               }  /* for all write_buffers   */
+
+           }    /* else buffers are PAGE_SIZE or bigger */
+
+        }
+        privptr->p_buff_write_num=claw_write_pages;
+        privptr->write_free_count=privptr->p_env->write_buffers;
+
+
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s:%s  End build claw write free chain \n",
+	dev->name,__FUNCTION__);
+        p_buf=privptr->p_write_free_chain;
+        while (p_buf!=NULL) {
+                dumpit((char *)p_buf, sizeof(struct ccwbk));
+                p_buf=p_buf->next;
+        }
+#endif
+        /*
+        *               allocate read_pages_required and chain to free chain
+        */
+        if (privptr->p_buff_read==NULL) {
+            if (privptr->p_env->read_size < PAGE_SIZE)  {
+                privptr->p_buff_read=
+			(void *)__get_free_pages(__GFP_DMA,
+			(int)pages_to_order_of_mag(claw_read_pages) );
+                if (privptr->p_buff_read==NULL) {
+                        printk(KERN_INFO "%s: %s() "
+			 	"__get_free_pages for read buf failed : "
+			 	"get is for %d pages\n",
+                                dev->name,__FUNCTION__,claw_read_pages );
+                        free_pages((unsigned long)privptr->p_buff_ccw,
+				(int)pages_to_order_of_mag(
+					privptr->p_buff_ccw_num));
+			/* free the write pages size is < page size  */
+                        free_pages((unsigned long)privptr->p_buff_write,
+				(int)pages_to_order_of_mag(
+				privptr->p_buff_write_num));
+                        privptr->p_buff_ccw=NULL;
+                        privptr->p_buff_write=NULL;
+#ifdef FUNCTRACE
+                        printk(KERN_INFO "%s: %s() > exit on line %d, rc ="
+				" ENOMEM\n",dev->name,__FUNCTION__,__LINE__);
+#endif
+                        return -ENOMEM;
+                }
+                memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
+                privptr->p_buff_read_num=claw_read_pages;
+                /*
+                *                               Build CLAW read free chain
+                *
+                */
+#ifdef DEBUGMSG
+                printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
+			dev->name,__FUNCTION__);
+#endif
+                p_buff=privptr->p_buff_read;
+                for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
+                        p_buf        = p_free_chain;
+                        p_free_chain = p_buf->next;
+
+                        if (p_last_CCWB==NULL) {
+                                p_buf->next=NULL;
+                                real_TIC_address=0;
+                                p_last_CCWB=p_buf;
+                        }
+                        else {
+                                p_buf->next=p_first_CCWB;
+                                real_TIC_address=
+				(__u32)__pa(&p_first_CCWB -> read );
+                        }
+
+                        p_first_CCWB=p_buf;
+
+                        p_buf->p_buffer=(struct clawbuf *)p_buff;
+                        /*  initialize read command */
+                        p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
+                        p_buf-> read.cda = (__u32)__pa(p_buff);
+                        p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+                        p_buf-> read.count       = privptr->p_env->read_size;
+
+                        /*  initialize read_h command */
+                        p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
+                        p_buf-> read_h.cda =
+				(__u32)__pa(&(p_buf->header));
+                        p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+                        p_buf-> read_h.count      = sizeof(struct clawh);
+
+                        /*  initialize Signal command */
+                        p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
+                        p_buf-> signal.cda =
+				(__u32)__pa(&(pClawH->flag));
+                        p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+                        p_buf-> signal.count     = 1;
+
+                        /*  initialize r_TIC_1 command */
+                        p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
+                        p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
+                        p_buf-> r_TIC_1.flags = 0;
+                        p_buf-> r_TIC_1.count      = 0;
+
+                        /*  initialize r_read_FF command */
+                        p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
+                        p_buf-> r_read_FF.cda =
+				(__u32)__pa(&(pClawH->flag));
+                        p_buf-> r_read_FF.flags =
+				CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
+                        p_buf-> r_read_FF.count    = 1;
+
+                        /*    initialize r_TIC_2          */
+                        memcpy(&p_buf->r_TIC_2,
+				&p_buf->r_TIC_1, sizeof(struct ccw1));
+
+                        /*     initialize Header     */
+                        p_buf->header.length=0xffff;
+                        p_buf->header.opcode=0xff;
+                        p_buf->header.flag=CLAW_PENDING;
+
+                        if (((unsigned long)p_buff+privptr->p_env->read_size) >=
+				((unsigned long)(p_buff+2*(privptr->p_env->read_size) -1)
+				 & PAGE_MASK) ) {
+                                p_buff= p_buff+privptr->p_env->read_size;
+                        }
+                        else {
+                                p_buff=
+				(void *)((unsigned long)
+					(p_buff+2*(privptr->p_env->read_size) -1)
+					 & PAGE_MASK) ;
+                        }
+                }   /* for read_buffers   */
+          }         /* read_size < PAGE_SIZE  */
+          else {  /* read Size >= PAGE_SIZE  */
+
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
+		dev->name,__FUNCTION__);
+#endif
+                for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
+                        p_buff = (void *)__get_free_pages(__GFP_DMA,
+				(int)pages_to_order_of_mag(privptr->p_buff_pages_perread) );
+                        if (p_buff==NULL) {
+                                printk(KERN_INFO "%s: %s() __get_free_pages for read "
+					"buf failed : get is for %d pages\n",
+					dev->name,__FUNCTION__,
+                                        privptr->p_buff_pages_perread );
+                                free_pages((unsigned long)privptr->p_buff_ccw,
+					(int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
+				/* free the write pages  */
+	                        p_buf=privptr->p_buff_write;
+                                while (p_buf!=NULL) {
+                                        free_pages((unsigned long)p_buf->p_buffer,
+						(int)pages_to_order_of_mag(
+						privptr->p_buff_pages_perwrite ));
+                                        p_buf=p_buf->next;
+                                }
+				/* free any read pages already alloc  */
+	                        p_buf=privptr->p_buff_read;
+                                while (p_buf!=NULL) {
+                                        free_pages((unsigned long)p_buf->p_buffer,
+						(int)pages_to_order_of_mag(
+						privptr->p_buff_pages_perread ));
+                                        p_buf=p_buf->next;
+                                }
+                                privptr->p_buff_ccw=NULL;
+                                privptr->p_buff_write=NULL;
+#ifdef FUNCTRACE
+                                printk(KERN_INFO "%s: %s() exit on line %d, rc = ENOMEM\n",
+					dev->name,__FUNCTION__,
+					__LINE__);
+#endif
+                                return -ENOMEM;
+                        }
+                        memset(p_buff, 0x00, privptr->p_env->read_size);
+                        p_buf        = p_free_chain;
+                        privptr->p_buff_read = p_buf;
+                        p_free_chain = p_buf->next;
+
+                        if (p_last_CCWB==NULL) {
+                                p_buf->next=NULL;
+                                real_TIC_address=0;
+                                p_last_CCWB=p_buf;
+                        }
+                        else {
+                                p_buf->next=p_first_CCWB;
+                                real_TIC_address=
+					(addr_t)__pa(
+						&p_first_CCWB -> read );
+                        }
+
+                        p_first_CCWB=p_buf;
+				/* save buff address */
+                        p_buf->p_buffer=(struct clawbuf *)p_buff;
+                        /*  initialize read command */
+                        p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
+                        p_buf-> read.cda = (__u32)__pa(p_buff);
+                        p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+                        p_buf-> read.count       = privptr->p_env->read_size;
+
+                        /*  initialize read_h command */
+                        p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
+                        p_buf-> read_h.cda =
+				(__u32)__pa(&(p_buf->header));
+                        p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+                        p_buf-> read_h.count      = sizeof(struct clawh);
+
+                        /*  initialize Signal command */
+                        p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
+                        p_buf-> signal.cda =
+				(__u32)__pa(&(pClawH->flag));
+                        p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+                        p_buf-> signal.count     = 1;
+
+                        /*  initialize r_TIC_1 command */
+                        p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
+                        p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
+                        p_buf-> r_TIC_1.flags = 0;
+                        p_buf-> r_TIC_1.count      = 0;
+
+                        /*  initialize r_read_FF command */
+                        p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
+                        p_buf-> r_read_FF.cda =
+				(__u32)__pa(&(pClawH->flag));
+                        p_buf-> r_read_FF.flags =
+				CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
+                        p_buf-> r_read_FF.count    = 1;
+
+                        /*    initialize r_TIC_2          */
+                        memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
+				sizeof(struct ccw1));
+
+                        /*     initialize Header     */
+                        p_buf->header.length=0xffff;
+                        p_buf->header.opcode=0xff;
+                        p_buf->header.flag=CLAW_PENDING;
+
+                }    /* For read_buffers   */
+          }     /*  read_size >= PAGE_SIZE   */
+        }       /*  pBuffread = NULL */
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: %s() >  End build claw read free chain \n",
+		dev->name,__FUNCTION__);
+        p_buf=p_first_CCWB;
+        while (p_buf!=NULL) {
+                dumpit((char *)p_buf, sizeof(struct ccwbk));
+                p_buf=p_buf->next;
+        }
+
+#endif
+        add_claw_reads( dev  ,p_first_CCWB , p_last_CCWB);
+	privptr->buffs_alloc = 1;
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s: %s() exit on line %d\n",
+		dev->name,__FUNCTION__,__LINE__);
+#endif
+        return 0;
+}    /*    end of init_ccw_bk */
+
+/*-------------------------------------------------------------------*
+*                                                                    *
+*       probe_error                                                  *
+*                                                                    *
+*--------------------------------------------------------------------*/
+
+static void
+probe_error( struct ccwgroup_device *cgdev)
+{
+  struct claw_privbk *privptr;
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s enter  \n",__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(4,trace,"proberr");
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s variable cgdev =\n",__FUNCTION__);
+        dumpit((char *) cgdev, sizeof(struct ccwgroup_device));
+#endif
+        privptr=(struct claw_privbk *)cgdev->dev.driver_data;
+	if (privptr!=NULL) {
+		if (privptr->p_env != NULL) {
+			kfree(privptr->p_env);
+			privptr->p_env=NULL;
+		}
+        	if (privptr->p_mtc_envelope!=NULL) {
+                	kfree(privptr->p_mtc_envelope);
+                	privptr->p_mtc_envelope=NULL;
+        	}
+                kfree(privptr);
+                privptr=NULL;
+        }
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s > exit on line %d\n",
+		 __FUNCTION__,__LINE__);
+#endif
+
+        return;
+}    /*    probe_error    */
+
+
+
+/*-------------------------------------------------------------------*
+*    claw_process_control                                            *
+*                                                                    *
+*                                                                    *
+*--------------------------------------------------------------------*/
+
+static int
+claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
+{
+
+        struct clawbuf *p_buf;
+        struct clawctl  ctlbk;
+        struct clawctl *p_ctlbk;
+        char    temp_host_name[8];
+        char    temp_ws_name[8];
+        struct claw_privbk *privptr;
+        struct claw_env *p_env;
+        struct sysval *p_sysval;
+        struct conncmd *p_connect=NULL;
+        int rc;
+        struct chbk *p_ch = NULL;
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s: %s() > enter  \n",
+		dev->name,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(2,setup,"clw_cntl");
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: variable dev =\n",dev->name);
+        dumpit((char *) dev, sizeof(struct net_device));
+        printk(KERN_INFO "%s: variable p_ccw =\n",dev->name);
+        dumpit((char *) p_ccw, sizeof(struct ccwbk *));
+#endif
+        udelay(1000);  /* Wait a ms for the control packets to
+			*catch up to each other */
+        privptr=dev->priv;
+        p_env=privptr->p_env;
+	memcpy( &temp_host_name, p_env->host_name, 8);
+        memcpy( &temp_ws_name, p_env->adapter_name , 8);
+        printk(KERN_INFO "%s: CLAW device %.8s: "
+		"Received Control Packet\n",
+		dev->name, temp_ws_name);
+        if (privptr->release_pend==1) {
+#ifdef FUNCTRACE
+                printk(KERN_INFO "%s: %s() > "
+			"exit on line %d, rc=0\n",
+			dev->name,__FUNCTION__,__LINE__);
+#endif
+                return 0;
+        }
+        p_buf=p_ccw->p_buffer;
+        p_ctlbk=&ctlbk;
+	if (p_env->packing == DO_PACKED) { /* packing in progress?*/
+		memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
+	} else {
+		memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
+	}
+#ifdef IOTRACE
+        printk(KERN_INFO "%s: dump claw control data inbound\n",dev->name);
+        dumpit((char *)p_ctlbk, sizeof(struct clawctl));
+#endif
+        switch (p_ctlbk->command)
+        {
+                case SYSTEM_VALIDATE_REQUEST:
+                        if (p_ctlbk->version!=CLAW_VERSION_ID) {
+                                claw_snd_sys_validate_rsp(dev, p_ctlbk,
+					CLAW_RC_WRONG_VERSION );
+                                printk("%s: %d is wrong version id. "
+					"Expected %d\n",
+					dev->name, p_ctlbk->version,
+                                        CLAW_VERSION_ID);
+                        }
+                        p_sysval=(struct sysval *)&(p_ctlbk->data);
+			printk( "%s: Recv Sys Validate Request: "
+				"Vers=%d,link_id=%d,Corr=%d,WS name=%."
+				"8s,Host name=%.8s\n",
+                                dev->name, p_ctlbk->version,
+				p_ctlbk->linkid,
+				p_ctlbk->correlator,
+				p_sysval->WS_name,
+                                p_sysval->host_name);
+                        if (0!=memcmp(temp_host_name,p_sysval->host_name,8)) {
+                                claw_snd_sys_validate_rsp(dev, p_ctlbk,
+					CLAW_RC_NAME_MISMATCH );
+				CLAW_DBF_TEXT(2,setup,"HSTBAD");
+				CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->host_name);
+				CLAW_DBF_TEXT_(2,setup,"%s",temp_host_name);
+                                printk(KERN_INFO "%s:  Host name mismatch\n",
+					dev->name);
+				printk(KERN_INFO "%s: Received :%s: "
+					"expected :%s: \n",
+					dev->name,
+					p_sysval->host_name,
+					temp_host_name);
+                        }
+                        if (0!=memcmp(temp_ws_name,p_sysval->WS_name,8)) {
+                                claw_snd_sys_validate_rsp(dev, p_ctlbk,
+					CLAW_RC_NAME_MISMATCH );
+				CLAW_DBF_TEXT(2,setup,"WSNBAD");
+                                CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->WS_name);
+                                CLAW_DBF_TEXT_(2,setup,"%s",temp_ws_name);
+                                printk(KERN_INFO "%s: WS name mismatch\n",
+					dev->name);
+				 printk(KERN_INFO "%s: Received :%s: "
+                                        "expected :%s: \n",
+                                        dev->name,
+                                        p_sysval->WS_name,
+					temp_ws_name);
+                        }
+                        if (( p_sysval->write_frame_size < p_env->write_size) &&
+			   ( p_env->packing == 0)) {
+                                claw_snd_sys_validate_rsp(dev, p_ctlbk,
+					CLAW_RC_HOST_RCV_TOO_SMALL );
+                                printk(KERN_INFO "%s: host write size is too "
+					"small\n", dev->name);
+				CLAW_DBF_TEXT(2,setup,"wrtszbad");
+                        }
+                        if (( p_sysval->read_frame_size < p_env->read_size) &&
+			   ( p_env->packing == 0)) {
+                                claw_snd_sys_validate_rsp(dev, p_ctlbk,
+					CLAW_RC_HOST_RCV_TOO_SMALL );
+                                printk(KERN_INFO "%s: host read size is too "
+					"small\n", dev->name);
+				CLAW_DBF_TEXT(2,setup,"rdsizbad");
+                        }
+                        claw_snd_sys_validate_rsp(dev, p_ctlbk, 0 );
+                        printk("%s: CLAW device %.8s: System validate"
+				" completed.\n",dev->name, temp_ws_name);
+			printk("%s: sys Validate Rsize:%d Wsize:%d\n",dev->name,
+				p_sysval->read_frame_size,p_sysval->write_frame_size);
+                        privptr->system_validate_comp=1;
+                	if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
+				p_env->packing = PACKING_ASK;
+			}
+                        claw_strt_conn_req(dev);
+                        break;
+
+                case SYSTEM_VALIDATE_RESPONSE:
+			p_sysval=(struct sysval *)&(p_ctlbk->data);
+			printk("%s: Recv Sys Validate Resp: Vers=%d,Corr=%d,RC=%d,"
+				"WS name=%.8s,Host name=%.8s\n",
+                        	dev->name,
+                        	p_ctlbk->version,
+                        	p_ctlbk->correlator,
+                        	p_ctlbk->rc,
+                        	p_sysval->WS_name,
+                        	p_sysval->host_name);
+                        switch (p_ctlbk->rc)
+                        {
+                                case 0:
+                                        printk(KERN_INFO "%s: CLAW device "
+						"%.8s: System validate "
+						"completed.\n",
+                                                dev->name, temp_ws_name);
+					if (privptr->system_validate_comp == 0)
+	                                        claw_strt_conn_req(dev);
+					privptr->system_validate_comp=1;
+                                        break;
+                                case CLAW_RC_NAME_MISMATCH:
+                                        printk(KERN_INFO "%s: Sys Validate "
+						"Resp : Host, WS name is "
+						"mismatch\n",
+                                                dev->name);
+                                        break;
+                                case CLAW_RC_WRONG_VERSION:
+                                        printk(KERN_INFO "%s: Sys Validate "
+						"Resp : Wrong version\n",
+						dev->name);
+                                        break;
+                                case CLAW_RC_HOST_RCV_TOO_SMALL:
+                                        printk(KERN_INFO "%s: Sys Validate "
+						"Resp : bad frame size\n",
+						dev->name);
+                                        break;
+                                default:
+                                        printk(KERN_INFO "%s: Sys Validate "
+						"error code=%d \n",
+						 dev->name, p_ctlbk->rc );
+                                        break;
+                        }
+                        break;
+
+                case CONNECTION_REQUEST:
+                        p_connect=(struct conncmd *)&(p_ctlbk->data);
+                        printk(KERN_INFO "%s: Recv Conn Req: Vers=%d,link_id=%d,"
+				"Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
+                        	dev->name,
+	                        p_ctlbk->version,
+        	                p_ctlbk->linkid,
+                	        p_ctlbk->correlator,
+                        	p_connect->host_name,
+                      		p_connect->WS_name);
+                        if (privptr->active_link_ID!=0 ) {
+                                claw_snd_disc(dev, p_ctlbk);
+                                printk(KERN_INFO "%s: Conn Req error : "
+					"already logical link is active \n",
+					dev->name);
+                        }
+                        if (p_ctlbk->linkid!=1 ) {
+                                claw_snd_disc(dev, p_ctlbk);
+                                printk(KERN_INFO "%s: Conn Req error : "
+					"req logical link id is not 1\n",
+					dev->name);
+                        }
+                        rc=find_link(dev,
+				p_connect->host_name, p_connect->WS_name);
+                        if (rc!=0) {
+                                claw_snd_disc(dev, p_ctlbk);
+                                printk(KERN_INFO "%s: Conn Req error : "
+					"req appl name does not match\n",
+					 dev->name);
+                        }
+                        claw_send_control(dev,
+				CONNECTION_CONFIRM, p_ctlbk->linkid,
+				p_ctlbk->correlator,
+				0, p_connect->host_name,
+                                p_connect->WS_name);
+			if (p_env->packing == PACKING_ASK) {
+				printk("%s: Now Pack ask\n",dev->name);
+				p_env->packing = PACK_SEND;
+				claw_snd_conn_req(dev,0);
+			}
+                        printk(KERN_INFO "%s: CLAW device %.8s: Connection "
+				"completed link_id=%d.\n",
+				dev->name, temp_ws_name,
+                                p_ctlbk->linkid);
+                        privptr->active_link_ID=p_ctlbk->linkid;
+                        p_ch=&privptr->channel[WRITE];
+                        wake_up(&p_ch->wait);  /* wake up claw_open ( WRITE) */
+                        break;
+                case CONNECTION_RESPONSE:
+                        p_connect=(struct conncmd *)&(p_ctlbk->data);
+                        printk(KERN_INFO "%s: Revc Conn Resp: Vers=%d,link_id=%d,"
+				"Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
+                                dev->name,
+				p_ctlbk->version,
+				p_ctlbk->linkid,
+				p_ctlbk->correlator,
+				p_ctlbk->rc,
+				p_connect->host_name,
+                                p_connect->WS_name);
+
+                        if (p_ctlbk->rc !=0 ) {
+                                printk(KERN_INFO "%s: Conn Resp error: rc=%d \n",
+					dev->name, p_ctlbk->rc);
+                                return 1;
+                        }
+                        rc=find_link(dev,
+				p_connect->host_name, p_connect->WS_name);
+                        if (rc!=0) {
+                                claw_snd_disc(dev, p_ctlbk);
+                                printk(KERN_INFO "%s: Conn Resp error: "
+					"req appl name does not match\n",
+					 dev->name);
+                        }
+			/* should be until CONNECTION_CONFIRM */
+                        privptr->active_link_ID =  - (p_ctlbk->linkid);
+                        break;
+                case CONNECTION_CONFIRM:
+                        p_connect=(struct conncmd *)&(p_ctlbk->data);
+                        printk(KERN_INFO "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
+				"Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
+                        dev->name,
+                        p_ctlbk->version,
+                        p_ctlbk->linkid,
+                        p_ctlbk->correlator,
+                        p_connect->host_name,
+                        p_connect->WS_name);
+                        if (p_ctlbk->linkid== -(privptr->active_link_ID)) {
+                                privptr->active_link_ID=p_ctlbk->linkid;
+				if (p_env->packing > PACKING_ASK) {
+					printk(KERN_INFO "%s: Confirmed Now packing\n",dev->name);
+					p_env->packing = DO_PACKED;
+					}
+				p_ch=&privptr->channel[WRITE];
+                                wake_up(&p_ch->wait);
+                        }
+                        else {
+                                printk(KERN_INFO "%s: Conn confirm: "
+					"unexpected linkid=%d \n",
+					dev->name, p_ctlbk->linkid);
+                                claw_snd_disc(dev, p_ctlbk);
+                        }
+                        break;
+                case DISCONNECT:
+                        printk(KERN_INFO "%s: Disconnect: "
+				"Vers=%d,link_id=%d,Corr=%d\n",
+				dev->name, p_ctlbk->version,
+                                p_ctlbk->linkid, p_ctlbk->correlator);
+			if ((p_ctlbk->linkid == 2) &&
+			    (p_env->packing == PACK_SEND)) {
+				privptr->active_link_ID = 1;
+				p_env->packing = DO_PACKED;
+			}
+			else
+	                        privptr->active_link_ID=0;
+                        break;
+                case CLAW_ERROR:
+                        printk(KERN_INFO "%s: CLAW ERROR detected\n",
+				dev->name);
+                        break;
+                default:
+                        printk(KERN_INFO "%s:  Unexpected command code=%d \n",
+				dev->name,  p_ctlbk->command);
+                        break;
+        }
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s: %s() exit on line %d, rc = 0\n",
+		dev->name,__FUNCTION__,__LINE__);
+#endif
+
+        return 0;
+}   /*    end of claw_process_control    */
+
+
+/*-------------------------------------------------------------------*
+*               claw_send_control                                    *
+*                                                                    *
+*--------------------------------------------------------------------*/
+
+static int
+claw_send_control(struct net_device *dev, __u8 type, __u8 link,
+	 __u8 correlator, __u8 rc, char *local_name, char *remote_name)
+{
+        struct claw_privbk 		*privptr;
+        struct clawctl                  *p_ctl;
+        struct sysval                   *p_sysval;
+        struct conncmd                  *p_connect;
+        struct sk_buff 			*skb;
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s > enter  \n",dev->name,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(2,setup,"sndcntl");
+#ifdef DEBUGMSG
+	printk(KERN_INFO "%s: Sending Control Packet \n",dev->name);
+        printk(KERN_INFO "%s: variable type = 0x%X, link = "
+		"%d, correlator = %d, rc = %d\n",
+                dev->name,type, link, correlator, rc);
+        printk(KERN_INFO "%s: variable local_name = %s, "
+		"remote_name = %s\n",dev->name, local_name, remote_name);
+#endif
+        privptr=dev->priv;
+        p_ctl=(struct clawctl *)&privptr->ctl_bk;
+
+        p_ctl->command=type;
+        p_ctl->version=CLAW_VERSION_ID;
+        p_ctl->linkid=link;
+        p_ctl->correlator=correlator;
+        p_ctl->rc=rc;
+
+        p_sysval=(struct sysval *)&p_ctl->data;
+        p_connect=(struct conncmd *)&p_ctl->data;
+
+        switch (p_ctl->command) {
+                case SYSTEM_VALIDATE_REQUEST:
+                case SYSTEM_VALIDATE_RESPONSE:
+                        memcpy(&p_sysval->host_name, local_name, 8);
+                        memcpy(&p_sysval->WS_name, remote_name, 8);
+			if (privptr->p_env->packing > 0) {
+                        	p_sysval->read_frame_size=DEF_PACK_BUFSIZE;
+	                        p_sysval->write_frame_size=DEF_PACK_BUFSIZE;
+			} else {
+				/* how big is the piggest group of packets */
+				p_sysval->read_frame_size=privptr->p_env->read_size;
+	                        p_sysval->write_frame_size=privptr->p_env->write_size;
+			}
+                        memset(&p_sysval->reserved, 0x00, 4);
+                        break;
+                case CONNECTION_REQUEST:
+                case CONNECTION_RESPONSE:
+                case CONNECTION_CONFIRM:
+                case DISCONNECT:
+                        memcpy(&p_sysval->host_name, local_name, 8);
+                        memcpy(&p_sysval->WS_name, remote_name, 8);
+			if (privptr->p_env->packing > 0) {
+			/* How big is the biggest packet */
+				p_connect->reserved1[0]=CLAW_FRAME_SIZE;
+                        	p_connect->reserved1[1]=CLAW_FRAME_SIZE;
+			} else {
+	                        memset(&p_connect->reserved1, 0x00, 4);
+        	                memset(&p_connect->reserved2, 0x00, 4);
+			}
+                        break;
+                default:
+                        break;
+        }
+
+        /*      write Control Record to the device                   */
+
+
+        skb = dev_alloc_skb(sizeof(struct clawctl));
+        if (!skb) {
+                printk(  "%s:%s low on mem, returning...\n",
+			dev->name,__FUNCTION__);
+#ifdef DEBUG
+                printk(KERN_INFO "%s:%s Exit, rc = ENOMEM\n",
+			dev->name,__FUNCTION__);
+#endif
+                return -ENOMEM;
+        }
+	memcpy(skb_put(skb, sizeof(struct clawctl)),
+		p_ctl, sizeof(struct clawctl));
+#ifdef IOTRACE
+	 printk(KERN_INFO "%s: outbnd claw cntl data \n",dev->name);
+        dumpit((char *)p_ctl,sizeof(struct clawctl));
+#endif
+	if (privptr->p_env->packing >= PACK_SEND)
+		claw_hw_tx(skb, dev, 1);
+	else
+        	claw_hw_tx(skb, dev, 0);
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Exit on line %d\n",
+		dev->name,__FUNCTION__,__LINE__);
+#endif
+
+        return 0;
+}  /*   end of claw_send_control  */
+
+/*-------------------------------------------------------------------*
+*               claw_snd_conn_req                                    *
+*                                                                    *
+*--------------------------------------------------------------------*/
+static int
+claw_snd_conn_req(struct net_device *dev, __u8 link)
+{
+        int                rc;
+        struct claw_privbk *privptr=dev->priv;
+        struct clawctl 	   *p_ctl;
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(2,setup,"snd_conn");
+#ifdef  DEBUGMSG
+        printk(KERN_INFO "%s: variable link = %X, dev =\n",dev->name, link);
+        dumpit((char *) dev, sizeof(struct net_device));
+#endif
+	rc = 1;
+        p_ctl=(struct clawctl *)&privptr->ctl_bk;
+	p_ctl->linkid = link;
+        if ( privptr->system_validate_comp==0x00 ) {
+#ifdef FUNCTRACE
+                printk(KERN_INFO "%s:%s Exit on line %d, rc = 1\n",
+			dev->name,__FUNCTION__,__LINE__);
+#endif
+                return rc;
+        }
+	if (privptr->p_env->packing == PACKING_ASK )
+		rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
+        		WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
+	if (privptr->p_env->packing == PACK_SEND)  {
+		rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
+        		WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
+	}
+	if (privptr->p_env->packing == 0)
+        	rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
+       			HOST_APPL_NAME, privptr->p_env->api_type);
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
+		dev->name,__FUNCTION__,__LINE__, rc);
+#endif
+        return rc;
+
+}  /*  end of claw_snd_conn_req */
+
+
+/*-------------------------------------------------------------------*
+*               claw_snd_disc                                        *
+*                                                                    *
+*--------------------------------------------------------------------*/
+
+static int
+claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
+{
+        int rc;
+        struct conncmd *  p_connect;
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(2,setup,"snd_dsc");
+#ifdef  DEBUGMSG
+        printk(KERN_INFO "%s: variable dev =\n",dev->name);
+        dumpit((char *) dev, sizeof(struct net_device));
+        printk(KERN_INFO "%s: variable p_ctl",dev->name);
+        dumpit((char *) p_ctl, sizeof(struct clawctl));
+#endif
+        p_connect=(struct conncmd *)&p_ctl->data;
+
+        rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
+		p_ctl->correlator, 0,
+                p_connect->host_name, p_connect->WS_name);
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
+		dev->name,__FUNCTION__, __LINE__, rc);
+#endif
+        return rc;
+}     /*   end of claw_snd_disc    */
+
+
+/*-------------------------------------------------------------------*
+*               claw_snd_sys_validate_rsp                            *
+*                                                                    *
+*--------------------------------------------------------------------*/
+
+static int
+claw_snd_sys_validate_rsp(struct net_device *dev,
+	struct clawctl *p_ctl, __u32 return_code)
+{
+        struct claw_env *  p_env;
+        struct claw_privbk *privptr;
+        int    rc;
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Enter\n",
+		dev->name,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(2,setup,"chkresp");
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: variable return_code = %d, dev =\n",
+		dev->name, return_code);
+        dumpit((char *) dev, sizeof(struct net_device));
+        printk(KERN_INFO "%s: variable p_ctl =\n",dev->name);
+        dumpit((char *) p_ctl, sizeof(struct clawctl));
+#endif
+        privptr = dev->priv;
+        p_env=privptr->p_env;
+        rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
+		p_ctl->linkid,
+		p_ctl->correlator,
+                return_code,
+		p_env->host_name,
+		p_env->adapter_name  );
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
+		dev->name,__FUNCTION__,__LINE__, rc);
+#endif
+        return rc;
+}     /*    end of claw_snd_sys_validate_rsp    */
+
+/*-------------------------------------------------------------------*
+*               claw_strt_conn_req                                   *
+*                                                                    *
+*--------------------------------------------------------------------*/
+
+static int
+claw_strt_conn_req(struct net_device *dev )
+{
+        int rc;
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(2,setup,"conn_req");
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s: variable dev =\n",dev->name);
+        dumpit((char *) dev, sizeof(struct net_device));
+#endif
+        rc=claw_snd_conn_req(dev, 1);
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
+		dev->name,__FUNCTION__,__LINE__, rc);
+#endif
+        return rc;
+}    /*   end of claw_strt_conn_req   */
+
+
+
+/*-------------------------------------------------------------------*
+ *   claw_stats                                                      *
+ *-------------------------------------------------------------------*/
+
+static struct
+net_device_stats *claw_stats(struct net_device *dev)
+{
+        struct claw_privbk *privptr;
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(4,trace,"stats");
+        privptr = dev->priv;
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Exit on line %d\n",
+		dev->name,__FUNCTION__,__LINE__);
+#endif
+        return &privptr->stats;
+}     /*   end of claw_stats   */
+
+
+/*-------------------------------------------------------------------*
+*       unpack_read                                                  *
+*                                                                    *
+*--------------------------------------------------------------------*/
+static void
+unpack_read(struct net_device *dev )
+{
+        struct sk_buff *skb;
+        struct claw_privbk *privptr;
+	struct claw_env    *p_env;
+        struct ccwbk 	*p_this_ccw;
+        struct ccwbk 	*p_first_ccw;
+        struct ccwbk 	*p_last_ccw;
+	struct clawph 	*p_packh;
+	void		*p_packd;
+	struct clawctl 	*p_ctlrec=NULL;
+
+        __u32	len_of_data;
+	__u32	pack_off;
+        __u8	link_num;
+        __u8 	mtc_this_frm=0;
+        __u32	bytes_to_mov;
+        struct chbk *p_ch = NULL;
+        int	i=0;
+	int     p=0;
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s enter  \n",dev->name,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(4,trace,"unpkread");
+        p_first_ccw=NULL;
+        p_last_ccw=NULL;
+	p_packh=NULL;
+	p_packd=NULL;
+        privptr=dev->priv;
+	p_env = privptr->p_env;
+        p_this_ccw=privptr->p_read_active_first;
+        i=0;
+	while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
+#ifdef IOTRACE
+		printk(KERN_INFO "%s p_this_ccw \n",dev->name);
+                dumpit((char*)p_this_ccw, sizeof(struct ccwbk));
+                printk(KERN_INFO "%s Inbound p_this_ccw->p_buffer(64)"
+			" pk=%d \n",dev->name,p_env->packing);
+                dumpit((char *)p_this_ccw->p_buffer, 64 );
+#endif
+		pack_off = 0;
+		p = 0;
+		p_this_ccw->header.flag=CLAW_PENDING;
+		privptr->p_read_active_first=p_this_ccw->next;
+                p_this_ccw->next=NULL;
+		p_packh = (struct clawph *)p_this_ccw->p_buffer;
+		if ((p_env->packing == PACK_SEND) &&
+		    (p_packh->len == 32)           &&
+		    (p_packh->link_num == 0)) {   /* is it a packed ctl rec? */
+			p_packh++;  /* peek past pack header */
+			p_ctlrec = (struct clawctl *)p_packh;
+			p_packh--;  /* un peek */
+			if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
+		            (p_ctlrec->command == CONNECTION_CONFIRM))
+				p_env->packing = DO_PACKED;
+		}
+		if (p_env->packing == DO_PACKED)
+			link_num=p_packh->link_num;
+		else
+	                link_num=p_this_ccw->header.opcode / 8;
+                if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
+#ifdef DEBUGMSG
+                        printk(KERN_INFO "%s: %s > More_to_come is ON\n",
+			dev->name,__FUNCTION__);
+#endif
+                        mtc_this_frm=1;
+                        if (p_this_ccw->header.length!=
+				privptr->p_env->read_size ) {
+                                printk(KERN_INFO " %s: Invalid frame detected "
+					"length is %02x\n" ,
+                                        dev->name, p_this_ccw->header.length);
+                        }
+                }
+
+                if (privptr->mtc_skipping) {
+                        /*
+                        *   We're in the mode of skipping past a
+			*   multi-frame message
+                        *   that we can't process for some reason or other.
+                        *   The first frame without the More-To-Come flag is
+			*   the last frame of the skipped message.
+                        */
+                        /*  in case of More-To-Come not set in this frame */
+                        if (mtc_this_frm==0) {
+                                privptr->mtc_skipping=0; /* Ok, the end */
+                                privptr->mtc_logical_link=-1;
+                        }
+#ifdef DEBUGMSG
+                        printk(KERN_INFO "%s:%s goto next "
+				"frame from MoretoComeSkip \n",
+				dev->name,__FUNCTION__);
+#endif
+                        goto NextFrame;
+                }
+
+                if (link_num==0) {
+                        claw_process_control(dev, p_this_ccw);
+#ifdef DEBUGMSG
+                        printk(KERN_INFO "%s:%s goto next "
+				"frame from claw_process_control \n",
+				dev->name,__FUNCTION__);
+#endif
+			CLAW_DBF_TEXT(4,trace,"UnpkCntl");
+                        goto NextFrame;
+                }
+unpack_next:
+		if (p_env->packing == DO_PACKED) {
+			if (pack_off > p_env->read_size)
+				goto NextFrame;
+			p_packd = p_this_ccw->p_buffer+pack_off;
+			p_packh = (struct clawph *) p_packd;
+			if ((p_packh->len == 0) || /* all done with this frame? */
+			    (p_packh->flag != 0))
+				goto NextFrame;
+			bytes_to_mov = p_packh->len;
+			pack_off += bytes_to_mov+sizeof(struct clawph);
+			p++;
+		} else {
+                	bytes_to_mov=p_this_ccw->header.length;
+		}
+                if (privptr->mtc_logical_link<0) {
+#ifdef DEBUGMSG
+                printk(KERN_INFO "%s: %s mtc_logical_link < 0  \n",
+			dev->name,__FUNCTION__);
+#endif
+
+                /*
+                *  if More-To-Come is set in this frame then we don't know
+                *  length of entire message, and hence have to allocate
+		*  large buffer   */
+
+                /*      We are starting a new envelope  */
+                privptr->mtc_offset=0;
+                        privptr->mtc_logical_link=link_num;
+                }
+
+                if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
+                        /*      error     */
+#ifdef DEBUGMSG
+                        printk(KERN_INFO "%s: %s > goto next "
+				"frame from MoretoComeSkip \n",
+				dev->name,
+				__FUNCTION__);
+                        printk(KERN_INFO "      bytes_to_mov %d > (MAX_ENVELOPE_"
+				"SIZE-privptr->mtc_offset %d)\n",
+				bytes_to_mov,(MAX_ENVELOPE_SIZE- privptr->mtc_offset));
+#endif
+                        privptr->stats.rx_frame_errors++;
+                        goto NextFrame;
+                }
+		if (p_env->packing == DO_PACKED) {
+			memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
+				p_packd+sizeof(struct clawph), bytes_to_mov);
+
+		} else	{
+                	memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
+                        	p_this_ccw->p_buffer, bytes_to_mov);
+		}
+#ifdef DEBUGMSG
+                printk(KERN_INFO "%s: %s() received data \n",
+			dev->name,__FUNCTION__);
+		if (p_env->packing == DO_PACKED)
+			dumpit((char *)p_packd+sizeof(struct clawph),32);
+		else
+	                dumpit((char *)p_this_ccw->p_buffer, 32);
+		printk(KERN_INFO "%s: %s() bytelength %d \n",
+			dev->name,__FUNCTION__,bytes_to_mov);
+#endif
+                if (mtc_this_frm==0) {
+                        len_of_data=privptr->mtc_offset+bytes_to_mov;
+                        skb=dev_alloc_skb(len_of_data);
+                        if (skb) {
+                                memcpy(skb_put(skb,len_of_data),
+					privptr->p_mtc_envelope,
+					len_of_data);
+                                skb->mac.raw=skb->data;
+                                skb->dev=dev;
+                                skb->protocol=htons(ETH_P_IP);
+                                skb->ip_summed=CHECKSUM_UNNECESSARY;
+                                privptr->stats.rx_packets++;
+				privptr->stats.rx_bytes+=len_of_data;
+                                netif_rx(skb);
+#ifdef DEBUGMSG
+                                printk(KERN_INFO "%s: %s() netif_"
+					"rx(skb) completed \n",
+					dev->name,__FUNCTION__);
+#endif
+                        }
+                        else {
+                                privptr->stats.rx_dropped++;
+                                printk(KERN_WARNING "%s: %s() low on memory\n",
+				dev->name,__FUNCTION__);
+                        }
+                        privptr->mtc_offset=0;
+                        privptr->mtc_logical_link=-1;
+                }
+                else {
+                        privptr->mtc_offset+=bytes_to_mov;
+                }
+		if (p_env->packing == DO_PACKED)
+			goto unpack_next;
+NextFrame:
+                /*
+                *   Remove ThisCCWblock from active read queue, and add it
+                *   to queue of free blocks to be reused.
+                */
+                i++;
+                p_this_ccw->header.length=0xffff;
+                p_this_ccw->header.opcode=0xff;
+                /*
+                *       add this one to the free queue for later reuse
+                */
+                if (p_first_ccw==NULL) {
+                        p_first_ccw = p_this_ccw;
+                }
+                else {
+                        p_last_ccw->next = p_this_ccw;
+                }
+                p_last_ccw = p_this_ccw;
+                /*
+                *       chain to next block on active read queue
+                */
+                p_this_ccw = privptr->p_read_active_first;
+		CLAW_DBF_TEXT_(4,trace,"rxpkt %d",p);
+        } /* end of while */
+
+        /*      check validity                  */
+
+#ifdef IOTRACE
+        printk(KERN_INFO "%s:%s processed frame is %d \n",
+		dev->name,__FUNCTION__,i);
+        printk(KERN_INFO "%s:%s  F:%lx L:%lx\n",
+		dev->name,
+		__FUNCTION__,
+		(unsigned long)p_first_ccw,
+		(unsigned long)p_last_ccw);
+#endif
+	CLAW_DBF_TEXT_(4,trace,"rxfrm %d",i);
+        add_claw_reads(dev, p_first_ccw, p_last_ccw);
+        p_ch=&privptr->channel[READ];
+        claw_strt_read(dev, LOCK_YES);
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s: %s exit on line %d\n",
+		dev->name, __FUNCTION__, __LINE__);
+#endif
+        return;
+}     /*  end of unpack_read   */
+
+/*-------------------------------------------------------------------*
+*       claw_strt_read                                               *
+*                                                                    *
+*--------------------------------------------------------------------*/
+static void
+claw_strt_read (struct net_device *dev, int lock )
+{
+        int        rc = 0;
+        __u32      parm;
+        unsigned long  saveflags = 0;
+        struct claw_privbk *privptr=dev->priv;
+        struct ccwbk*p_ccwbk;
+        struct chbk *p_ch;
+        struct clawh *p_clawh;
+        p_ch=&privptr->channel[READ];
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
+        printk(KERN_INFO "%s: variable lock = %d, dev =\n",dev->name, lock);
+        dumpit((char *) dev, sizeof(struct net_device));
+#endif
+	CLAW_DBF_TEXT(4,trace,"StRdNter");
+        p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
+        p_clawh->flag=CLAW_IDLE;    /* 0x00 */
+
+        if ((privptr->p_write_active_first!=NULL &&
+             privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
+            (privptr->p_read_active_first!=NULL &&
+             privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
+                p_clawh->flag=CLAW_BUSY;    /* 0xff */
+        }
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s:%s state-%02x\n" ,
+		dev->name,__FUNCTION__, p_ch->claw_state);
+#endif
+        if (lock==LOCK_YES) {
+                spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
+        }
+        if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
+#ifdef DEBUGMSG
+                printk(KERN_INFO "%s: HOT READ started in %s\n" ,
+			dev->name,__FUNCTION__);
+                p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
+                dumpit((char *)&p_clawh->flag , 1);
+#endif
+		CLAW_DBF_TEXT(4,trace,"HotRead");
+                p_ccwbk=privptr->p_read_active_first;
+                parm = (unsigned long) p_ch;
+                rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
+				       0xff, 0);
+                if (rc != 0) {
+                        ccw_check_return_code(p_ch->cdev, rc);
+                }
+        }
+	else {
+#ifdef DEBUGMSG
+		printk(KERN_INFO "%s: No READ started by %s() In progress\n" ,
+			dev->name,__FUNCTION__);
+#endif
+		CLAW_DBF_TEXT(2,trace,"ReadAct");
+	}
+
+        if (lock==LOCK_YES) {
+                spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
+        }
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Exit on line %d\n",
+		dev->name,__FUNCTION__,__LINE__);
+#endif
+	CLAW_DBF_TEXT(4,trace,"StRdExit");
+        return;
+}       /*    end of claw_strt_read    */
+
+/*-------------------------------------------------------------------*
+*       claw_strt_out_IO                                             *
+*                                                                    *
+*--------------------------------------------------------------------*/
+
+static void
+claw_strt_out_IO( struct net_device *dev )
+{
+        int             	rc = 0;
+        unsigned long   	parm;
+        struct claw_privbk 	*privptr;
+        struct chbk     	*p_ch;
+        struct ccwbk   	*p_first_ccw;
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
+#endif
+	if (!dev) {
+		return;
+	}
+        privptr=(struct claw_privbk *)dev->priv;
+        p_ch=&privptr->channel[WRITE];
+
+#ifdef DEBUGMSG
+        printk(KERN_INFO "%s:%s state-%02x\n" ,
+		dev->name,__FUNCTION__,p_ch->claw_state);
+#endif
+        CLAW_DBF_TEXT(4,trace,"strt_io");
+        p_first_ccw=privptr->p_write_active_first;
+
+        if (p_ch->claw_state == CLAW_STOP)
+                return;
+        if (p_first_ccw == NULL) {
+#ifdef FUNCTRACE
+                printk(KERN_INFO "%s:%s Exit on line %d\n",
+			dev->name,__FUNCTION__,__LINE__);
+#endif
+                return;
+        }
+        if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
+                parm = (unsigned long) p_ch;
+#ifdef DEBUGMSG
+                printk(KERN_INFO "%s:%s do_io \n" ,dev->name,__FUNCTION__);
+                dumpit((char *)p_first_ccw, sizeof(struct ccwbk));
+#endif
+		CLAW_DBF_TEXT(2,trace,"StWrtIO");
+                rc = ccw_device_start (p_ch->cdev,&p_first_ccw->write, parm,
+				       0xff, 0);
+                if (rc != 0) {
+                        ccw_check_return_code(p_ch->cdev, rc);
+                }
+        }
+        dev->trans_start = jiffies;
+#ifdef FUNCTRACE
+	printk(KERN_INFO "%s:%s Exit on line %d\n",
+		dev->name,__FUNCTION__,__LINE__);
+#endif
+
+        return;
+}       /*    end of claw_strt_out_IO    */
+
+/*-------------------------------------------------------------------*
+*       Free write buffers                                           *
+*                                                                    *
+*--------------------------------------------------------------------*/
+
+static void
+claw_free_wrt_buf( struct net_device *dev )
+{
+
+        struct claw_privbk *privptr=(struct claw_privbk *)dev->priv;
+        struct ccwbk*p_first_ccw;
+	struct ccwbk*p_last_ccw;
+	struct ccwbk*p_this_ccw;
+	struct ccwbk*p_next_ccw;
+#ifdef IOTRACE
+        struct ccwbk*p_buf;
+#endif
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
+        printk(KERN_INFO "%s: free count = %d  variable dev =\n",
+		dev->name,privptr->write_free_count);
+#endif
+	CLAW_DBF_TEXT(4,trace,"freewrtb");
+        /*  scan the write queue to free any completed write packets   */
+        p_first_ccw=NULL;
+        p_last_ccw=NULL;
+#ifdef IOTRACE
+        printk(KERN_INFO "%s:  Dump current CCW chain \n",dev->name  );
+        p_buf=privptr->p_write_active_first;
+        while (p_buf!=NULL) {
+                dumpit((char *)p_buf, sizeof(struct ccwbk));
+                p_buf=p_buf->next;
+        }
+        if (p_buf==NULL) {
+                printk(KERN_INFO "%s: privptr->p_write_"
+			"active_first==NULL\n",dev->name  );
+        }
+        p_buf=(struct ccwbk*)privptr->p_end_ccw;
+        dumpit((char *)p_buf, sizeof(struct endccw));
+#endif
+        p_this_ccw=privptr->p_write_active_first;
+        while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
+        {
+                p_next_ccw = p_this_ccw->next;
+                if (((p_next_ccw!=NULL) &&
+		     (p_next_ccw->header.flag!=CLAW_PENDING)) ||
+                    ((p_this_ccw == privptr->p_write_active_last) &&
+                     (p_this_ccw->header.flag!=CLAW_PENDING))) {
+                        /* The next CCW is OK or this is  */
+			/* the last CCW...free it   @A1A  */
+                        privptr->p_write_active_first=p_this_ccw->next;
+			p_this_ccw->header.flag=CLAW_PENDING;
+                        p_this_ccw->next=privptr->p_write_free_chain;
+			privptr->p_write_free_chain=p_this_ccw;
+                        ++privptr->write_free_count;
+			privptr->stats.tx_bytes+= p_this_ccw->write.count;
+			p_this_ccw=privptr->p_write_active_first;
+                        privptr->stats.tx_packets++;
+                }
+                else {
+			break;
+                }
+        }
+        if (privptr->write_free_count!=0) {
+                claw_clearbit_busy(TB_NOBUFFER,dev);
+        }
+        /*   whole chain removed?   */
+        if (privptr->p_write_active_first==NULL) {
+                privptr->p_write_active_last=NULL;
+#ifdef DEBUGMSG
+                printk(KERN_INFO "%s:%s p_write_"
+			"active_first==NULL\n",dev->name,__FUNCTION__);
+#endif
+        }
+#ifdef IOTRACE
+        printk(KERN_INFO "%s: Dump arranged CCW chain \n",dev->name  );
+        p_buf=privptr->p_write_active_first;
+        while (p_buf!=NULL) {
+                dumpit((char *)p_buf, sizeof(struct ccwbk));
+                p_buf=p_buf->next;
+        }
+        if (p_buf==NULL) {
+                printk(KERN_INFO "%s: privptr->p_write_active_"
+			"first==NULL\n",dev->name  );
+        }
+        p_buf=(struct ccwbk*)privptr->p_end_ccw;
+        dumpit((char *)p_buf, sizeof(struct endccw));
+#endif
+
+	CLAW_DBF_TEXT_(4,trace,"FWC=%d",privptr->write_free_count);
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Exit on line %d free_count =%d\n",
+		dev->name,__FUNCTION__, __LINE__,privptr->write_free_count);
+#endif
+        return;
+}
+
+/*-------------------------------------------------------------------*
+*       claw free netdevice                                          *
+*                                                                    *
+*--------------------------------------------------------------------*/
+static void
+claw_free_netdevice(struct net_device * dev, int free_dev)
+{
+	struct claw_privbk *privptr;
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(2,setup,"free_dev");
+
+	if (!dev)
+		return;
+	CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
+	privptr = dev->priv;
+	if (dev->flags & IFF_RUNNING)
+		claw_release(dev);
+	if (privptr) {
+		privptr->channel[READ].ndev = NULL;  /* say it's free */
+	}
+	dev->priv=NULL;
+#ifdef MODULE
+	if (free_dev) {
+		free_netdev(dev);
+	}
+#endif
+	CLAW_DBF_TEXT(2,setup,"feee_ok");
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
+#endif
+}
+
+/**
+ * Claw init netdevice
+ * Initialize everything of the net device except the name and the
+ * channel structs.
+ */
+static void
+claw_init_netdevice(struct net_device * dev)
+{
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(2,setup,"init_dev");
+	CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
+	if (!dev) {
+        printk(KERN_WARNING "claw:%s BAD Device exit line %d\n",
+		__FUNCTION__,__LINE__);
+		CLAW_DBF_TEXT(2,setup,"baddev");
+		return;
+	}
+	dev->mtu = CLAW_DEFAULT_MTU_SIZE;
+	dev->hard_start_xmit = claw_tx;
+	dev->open = claw_open;
+	dev->stop = claw_release;
+	dev->get_stats = claw_stats;
+	dev->change_mtu = claw_change_mtu;
+	dev->hard_header_len = 0;
+	dev->addr_len = 0;
+	dev->type = ARPHRD_SLIP;
+	dev->tx_queue_len = 1300;
+	dev->flags = IFF_POINTOPOINT | IFF_NOARP;
+	SET_MODULE_OWNER(dev);
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT(2,setup,"initok");
+	return;
+}
+
+/**
+ * Init a new channel in the privptr->channel[i].
+ *
+ * @param cdev  The ccw_device to be added.
+ *
+ * @return 0 on success, !0 on error.
+ */
+static int
+add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
+{
+	struct chbk *p_ch;
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "%s:%s Enter\n",cdev->dev.bus_id,__FUNCTION__);
+#endif
+	CLAW_DBF_TEXT_(2,setup,"%s",cdev->dev.bus_id);
+	privptr->channel[i].flag  = i+1;   /* Read is 1 Write is 2 */
+	p_ch = &privptr->channel[i];
+	p_ch->cdev = cdev;
+	snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", cdev->dev.bus_id);
+	sscanf(cdev->dev.bus_id+4,"%x",&p_ch->devno);
+	if ((p_ch->irb = kmalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
+		printk(KERN_WARNING "%s Out of memory in %s for irb\n",
+			p_ch->id,__FUNCTION__);
+#ifdef FUNCTRACE
+        	printk(KERN_INFO "%s:%s Exit on line %d\n",
+			p_ch->id,__FUNCTION__,__LINE__);
+#endif
+		return -ENOMEM;
+	}
+	memset(p_ch->irb, 0, sizeof (struct irb));
+#ifdef FUNCTRACE
+        	printk(KERN_INFO "%s:%s Exit on line %d\n",
+			cdev->dev.bus_id,__FUNCTION__,__LINE__);
+#endif
+	return 0;
+}
+
+
+/**
+ *
+ * Setup an interface.
+ *
+ * @param cgdev  Device to be setup.
+ *
+ * @returns 0 on success, !0 on failure.
+ */
+static int
+claw_new_device(struct ccwgroup_device *cgdev)
+{
+	struct claw_privbk *privptr;
+	struct claw_env *p_env;
+	struct net_device *dev;
+	int ret;
+
+	pr_debug("%s() called\n", __FUNCTION__);
+	printk(KERN_INFO "claw: add for %s\n",cgdev->cdev[READ]->dev.bus_id);
+	CLAW_DBF_TEXT(2,setup,"new_dev");
+	privptr = cgdev->dev.driver_data;
+	cgdev->cdev[READ]->dev.driver_data = privptr;
+	cgdev->cdev[WRITE]->dev.driver_data = privptr;
+	if (!privptr)
+		return -ENODEV;
+	p_env = privptr->p_env;
+	sscanf(cgdev->cdev[READ]->dev.bus_id+4,"%x",
+		&p_env->devno[READ]);
+        sscanf(cgdev->cdev[WRITE]->dev.bus_id+4,"%x",
+		&p_env->devno[WRITE]);
+	ret = add_channel(cgdev->cdev[0],0,privptr);
+	if (ret == 0)
+		ret = add_channel(cgdev->cdev[1],1,privptr);
+	if (ret != 0) {
+			printk(KERN_WARNING
+		 	"add channel failed "
+				"with ret = %d\n", ret);
+			goto out;
+	}
+	ret = ccw_device_set_online(cgdev->cdev[READ]);
+	if (ret != 0) {
+		printk(KERN_WARNING
+		 "claw: ccw_device_set_online %s READ failed "
+			"with ret = %d\n",cgdev->cdev[READ]->dev.bus_id,ret);
+		goto out;
+	}
+	ret = ccw_device_set_online(cgdev->cdev[WRITE]);
+	if (ret != 0) {
+		printk(KERN_WARNING
+		 "claw: ccw_device_set_online %s WRITE failed "
+			"with ret = %d\n",cgdev->cdev[WRITE]->dev.bus_id, ret);
+		goto out;
+	}
+	dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
+	if (!dev) {
+		printk(KERN_WARNING "%s:alloc_netdev failed\n",__FUNCTION__);
+		goto out;
+	}
+	dev->priv = privptr;
+	cgdev->dev.driver_data = privptr;
+        cgdev->cdev[READ]->dev.driver_data = privptr;
+        cgdev->cdev[WRITE]->dev.driver_data = privptr;
+	/* sysfs magic */
+        SET_NETDEV_DEV(dev, &cgdev->dev);
+	if (register_netdev(dev) != 0) {
+		claw_free_netdevice(dev, 1);
+		CLAW_DBF_TEXT(2,trace,"regfail");
+		goto out;
+	}
+	dev->flags &=~IFF_RUNNING;
+	if (privptr->buffs_alloc == 0) {
+	        ret=init_ccw_bk(dev);
+		if (ret !=0) {
+			printk(KERN_WARNING
+			 "claw: init_ccw_bk failed with ret=%d\n", ret);
+			unregister_netdev(dev);
+			claw_free_netdevice(dev,1);
+			CLAW_DBF_TEXT(2,trace,"ccwmem");
+			goto out;
+		}
+	}
+	privptr->channel[READ].ndev = dev;
+	privptr->channel[WRITE].ndev = dev;
+	privptr->p_env->ndev = dev;
+
+	printk(KERN_INFO "%s:readsize=%d  writesize=%d "
+		"readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
+                dev->name, p_env->read_size,
+		p_env->write_size, p_env->read_buffers,
+                p_env->write_buffers, p_env->devno[READ],
+		p_env->devno[WRITE]);
+        printk(KERN_INFO "%s:host_name:%.8s, adapter_name "
+		":%.8s api_type: %.8s\n",
+                dev->name, p_env->host_name,
+		p_env->adapter_name , p_env->api_type);
+	return 0;
+out:
+	ccw_device_set_offline(cgdev->cdev[1]);
+	ccw_device_set_offline(cgdev->cdev[0]);
+
+	return -ENODEV;
+}
+
+static void
+claw_purge_skb_queue(struct sk_buff_head *q)
+{
+        struct sk_buff *skb;
+
+        CLAW_DBF_TEXT(4,trace,"purgque");
+
+        while ((skb = skb_dequeue(q))) {
+                atomic_dec(&skb->users);
+                dev_kfree_skb_irq(skb);
+        }
+}
+
+/**
+ * Shutdown an interface.
+ *
+ * @param cgdev  Device to be shut down.
+ *
+ * @returns 0 on success, !0 on failure.
+ */
+static int
+claw_shutdown_device(struct ccwgroup_device *cgdev)
+{
+	struct claw_privbk *priv;
+	struct net_device *ndev;
+	int	ret;
+
+	pr_debug("%s() called\n", __FUNCTION__);
+	CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
+	priv = cgdev->dev.driver_data;
+	if (!priv)
+		return -ENODEV;
+	ndev = priv->channel[READ].ndev;
+	if (ndev) {
+		/* Close the device */
+		printk(KERN_INFO
+			"%s: shuting down \n",ndev->name);
+		if (ndev->flags & IFF_RUNNING)
+			ret = claw_release(ndev);
+		ndev->flags &=~IFF_RUNNING;
+		unregister_netdev(ndev);
+		ndev->priv = NULL;  /* cgdev data, not ndev's to free */
+		claw_free_netdevice(ndev, 1);
+		priv->channel[READ].ndev = NULL;
+		priv->channel[WRITE].ndev = NULL;
+		priv->p_env->ndev = NULL;
+	}
+	ccw_device_set_offline(cgdev->cdev[1]);
+	ccw_device_set_offline(cgdev->cdev[0]);
+	return 0;
+}
+
+static void
+claw_remove_device(struct ccwgroup_device *cgdev)
+{
+	struct claw_privbk *priv;
+
+	pr_debug("%s() called\n", __FUNCTION__);
+	CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
+	priv = cgdev->dev.driver_data;
+	if (!priv) {
+		printk(KERN_WARNING "claw: %s() no Priv exiting\n",__FUNCTION__);
+		return;
+	}
+	printk(KERN_INFO "claw: %s() called %s will be removed.\n",
+			__FUNCTION__,cgdev->cdev[0]->dev.bus_id);
+	if (cgdev->state == CCWGROUP_ONLINE)
+		claw_shutdown_device(cgdev);
+	claw_remove_files(&cgdev->dev);
+	if (priv->p_mtc_envelope!=NULL) {
+                kfree(priv->p_mtc_envelope);
+                priv->p_mtc_envelope=NULL;
+        }
+	if (priv->p_env != NULL) {
+		kfree(priv->p_env);
+		priv->p_env=NULL;
+	}
+	if (priv->channel[0].irb != NULL) {
+		kfree(priv->channel[0].irb);
+		priv->channel[0].irb=NULL;
+	}
+	if (priv->channel[1].irb != NULL) {
+		kfree(priv->channel[1].irb);
+		priv->channel[1].irb=NULL;
+	}
+	kfree(priv);
+	cgdev->dev.driver_data=NULL;
+	cgdev->cdev[READ]->dev.driver_data = NULL;
+	cgdev->cdev[WRITE]->dev.driver_data = NULL;
+	put_device(&cgdev->dev);
+}
+
+
+/*
+ * sysfs attributes
+ */
+static ssize_t
+claw_hname_show(struct device *dev, char *buf)
+{
+	struct claw_privbk *priv;
+	struct claw_env *  p_env;
+
+	priv = dev->driver_data;
+	if (!priv)
+		return -ENODEV;
+	p_env = priv->p_env;
+	return sprintf(buf, "%s\n",p_env->host_name);
+}
+
+static ssize_t
+claw_hname_write(struct device *dev, const char *buf, size_t count)
+{
+	struct claw_privbk *priv;
+	struct claw_env *  p_env;
+
+	priv = dev->driver_data;
+	if (!priv)
+		return -ENODEV;
+	p_env = priv->p_env;
+	if (count > MAX_NAME_LEN+1)
+		return -EINVAL;
+	memset(p_env->host_name, 0x20, MAX_NAME_LEN);
+	strncpy(p_env->host_name,buf, count);
+	p_env->host_name[count-1] = 0x20;  /* clear extra 0x0a */
+	p_env->host_name[MAX_NAME_LEN] = 0x00;
+	CLAW_DBF_TEXT(2,setup,"HstnSet");
+        CLAW_DBF_TEXT_(2,setup,"%s",p_env->host_name);
+
+	return count;
+}
+
+static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
+
+static ssize_t
+claw_adname_show(struct device *dev, char *buf)
+{
+	struct claw_privbk *priv;
+	struct claw_env *  p_env;
+
+	priv = dev->driver_data;
+	if (!priv)
+		return -ENODEV;
+	p_env = priv->p_env;
+	return sprintf(buf, "%s\n",p_env->adapter_name);
+}
+
+static ssize_t
+claw_adname_write(struct device *dev, const char *buf, size_t count)
+{
+	struct claw_privbk *priv;
+	struct claw_env *  p_env;
+
+	priv = dev->driver_data;
+	if (!priv)
+		return -ENODEV;
+	p_env = priv->p_env;
+	if (count > MAX_NAME_LEN+1)
+		return -EINVAL;
+	memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
+	strncpy(p_env->adapter_name,buf, count);
+	p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
+	p_env->adapter_name[MAX_NAME_LEN] = 0x00;
+	CLAW_DBF_TEXT(2,setup,"AdnSet");
+	CLAW_DBF_TEXT_(2,setup,"%s",p_env->adapter_name);
+
+	return count;
+}
+
+static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
+
+static ssize_t
+claw_apname_show(struct device *dev, char *buf)
+{
+	struct claw_privbk *priv;
+	struct claw_env *  p_env;
+
+	priv = dev->driver_data;
+	if (!priv)
+		return -ENODEV;
+	p_env = priv->p_env;
+	return sprintf(buf, "%s\n",
+		       p_env->api_type);
+}
+
+static ssize_t
+claw_apname_write(struct device *dev, const char *buf, size_t count)
+{
+	struct claw_privbk *priv;
+	struct claw_env *  p_env;
+
+	priv = dev->driver_data;
+	if (!priv)
+		return -ENODEV;
+	p_env = priv->p_env;
+	if (count > MAX_NAME_LEN+1)
+		return -EINVAL;
+	memset(p_env->api_type, 0x20, MAX_NAME_LEN);
+	strncpy(p_env->api_type,buf, count);
+	p_env->api_type[count-1] = 0x20;  /* we get a loose 0x0a */
+	p_env->api_type[MAX_NAME_LEN] = 0x00;
+	if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
+		p_env->read_size=DEF_PACK_BUFSIZE;
+		p_env->write_size=DEF_PACK_BUFSIZE;
+		p_env->packing=PACKING_ASK;
+		CLAW_DBF_TEXT(2,setup,"PACKING");
+	}
+	else {
+		p_env->packing=0;
+		p_env->read_size=CLAW_FRAME_SIZE;
+		p_env->write_size=CLAW_FRAME_SIZE;
+		CLAW_DBF_TEXT(2,setup,"ApiSet");
+	}
+	CLAW_DBF_TEXT_(2,setup,"%s",p_env->api_type);
+	return count;
+}
+
+static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
+
+static ssize_t
+claw_wbuff_show(struct device *dev, char *buf)
+{
+	struct claw_privbk *priv;
+	struct claw_env * p_env;
+
+	priv = dev->driver_data;
+	if (!priv)
+		return -ENODEV;
+	p_env = priv->p_env;
+	return sprintf(buf, "%d\n", p_env->write_buffers);
+}
+
+static ssize_t
+claw_wbuff_write(struct device *dev, const char *buf, size_t count)
+{
+	struct claw_privbk *priv;
+	struct claw_env *  p_env;
+	int nnn,max;
+
+	priv = dev->driver_data;
+	if (!priv)
+		return -ENODEV;
+	p_env = priv->p_env;
+	sscanf(buf, "%i", &nnn);
+	if (p_env->packing) {
+		max = 64;
+	}
+	else {
+		max = 512;
+	}
+	if ((nnn > max ) || (nnn < 2))
+		return -EINVAL;
+	p_env->write_buffers = nnn;
+	CLAW_DBF_TEXT(2,setup,"Wbufset");
+        CLAW_DBF_TEXT_(2,setup,"WB=%d",p_env->write_buffers);
+	return count;
+}
+
+static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
+
+static ssize_t
+claw_rbuff_show(struct device *dev, char *buf)
+{
+	struct claw_privbk *priv;
+	struct claw_env *  p_env;
+
+	priv = dev->driver_data;
+	if (!priv)
+		return -ENODEV;
+	p_env = priv->p_env;
+	return sprintf(buf, "%d\n", p_env->read_buffers);
+}
+
+static ssize_t
+claw_rbuff_write(struct device *dev, const char *buf, size_t count)
+{
+	struct claw_privbk *priv;
+	struct claw_env *p_env;
+	int nnn,max;
+
+	priv = dev->driver_data;
+	if (!priv)
+		return -ENODEV;
+	p_env = priv->p_env;
+	sscanf(buf, "%i", &nnn);
+	if (p_env->packing) {
+		max = 64;
+	}
+	else {
+		max = 512;
+	}
+	if ((nnn > max ) || (nnn < 2))
+		return -EINVAL;
+	p_env->read_buffers = nnn;
+	CLAW_DBF_TEXT(2,setup,"Rbufset");
+	CLAW_DBF_TEXT_(2,setup,"RB=%d",p_env->read_buffers);
+	return count;
+}
+
+static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
+
+static struct attribute *claw_attr[] = {
+	&dev_attr_read_buffer.attr,
+	&dev_attr_write_buffer.attr,
+	&dev_attr_adapter_name.attr,
+	&dev_attr_api_type.attr,
+	&dev_attr_host_name.attr,
+	NULL,
+};
+
+static struct attribute_group claw_attr_group = {
+	.attrs = claw_attr,
+};
+
+static int
+claw_add_files(struct device *dev)
+{
+	pr_debug("%s() called\n", __FUNCTION__);
+	CLAW_DBF_TEXT(2,setup,"add_file");
+	return sysfs_create_group(&dev->kobj, &claw_attr_group);
+}
+
+static void
+claw_remove_files(struct device *dev)
+{
+	pr_debug("%s() called\n", __FUNCTION__);
+	CLAW_DBF_TEXT(2,setup,"rem_file");
+	sysfs_remove_group(&dev->kobj, &claw_attr_group);
+}
+
+/*--------------------------------------------------------------------*
+*    claw_init  and cleanup                                           *
+*---------------------------------------------------------------------*/
+
+static void __exit
+claw_cleanup(void)
+{
+	unregister_cu3088_discipline(&claw_group_driver);
+	claw_unregister_debug_facility();
+	printk(KERN_INFO "claw: Driver unloaded\n");
+
+}
+
+/**
+ * Initialize module.
+ * This is called just after the module is loaded.
+ *
+ * @return 0 on success, !0 on error.
+ */
+static int __init
+claw_init(void)
+{
+	int ret = 0;
+       printk(KERN_INFO "claw: starting driver "
+#ifdef MODULE
+                "module "
+#else
+                "compiled into kernel "
+#endif
+                " $Revision: 1.35 $ $Date: 2005/03/24 12:25:38 $ \n");
+
+
+#ifdef FUNCTRACE
+        printk(KERN_INFO "claw: %s() enter \n",__FUNCTION__);
+#endif
+	ret = claw_register_debug_facility();
+	if (ret) {
+		printk(KERN_WARNING "claw: %s() debug_register failed %d\n",
+			__FUNCTION__,ret);
+		return ret;
+	}
+	CLAW_DBF_TEXT(2,setup,"init_mod");
+	ret = register_cu3088_discipline(&claw_group_driver);
+	if (ret) {
+		claw_unregister_debug_facility();
+		printk(KERN_WARNING "claw; %s() cu3088 register failed %d\n",
+			__FUNCTION__,ret);
+	}
+#ifdef FUNCTRACE
+        printk(KERN_INFO "claw: %s() exit \n",__FUNCTION__);
+#endif
+	return ret;
+}
+
+module_init(claw_init);
+module_exit(claw_cleanup);
+
+
+
+/*--------------------------------------------------------------------*
+*    End of File                                                      *
+*---------------------------------------------------------------------*/
+
+