text: /*
   *  drivers/s390/net/claw.c
   *    ESCON CLAW network driver
   *
   *  Linux for 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/ccwdev.h>
  #include <asm/ccwgroup.h>
  #include <asm/debug.h>
  #include <asm/idals.h>
  #include <asm/io.h>
  
  #include <linux/bitops.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 "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
  
  static 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", 2, 1, 8);
  	claw_dbf_trace = debug_register("claw_trace", 2, 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 ccw_check_return_code (struct ccw_device *cdev, int return_code);
  static void 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 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, struct device_attribute *attr, char *buf);
  static ssize_t claw_hname_write(struct device *dev, struct device_attribute *attr,
  	const char *buf, size_t count);
  static ssize_t claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf);
  static ssize_t claw_adname_write(struct device *dev, struct device_attribute *attr,
  	const char *buf, size_t count);
  static ssize_t claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf);
  static ssize_t claw_apname_write(struct device *dev, struct device_attribute *attr,
  	const char *buf, size_t count);
  static ssize_t claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
  static ssize_t claw_wbuff_write(struct device *dev, struct device_attribute *attr,
  	const char *buf, size_t count);
  static ssize_t claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
  static ssize_t claw_rbuff_write(struct device *dev, struct device_attribute *attr,
  	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 = kzalloc(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;
  	}
  	privptr->p_mtc_envelope= kzalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
  	privptr->p_env = kzalloc(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;
          }
  	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_empty(&p_ch->collect_queue)) {
  	/* some data */
  		held_skb = skb_dequeue(&p_ch->collect_queue);
  		if (held_skb)
  			dev_kfree_skb_any(held_skb);
  		else
  			return NULL;
  		if (p_env->packing != DO_PACKED)
  			return held_skb;
  		/* 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_any(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_any(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_empty(&p_ch->collect_queue)) {
  	  	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
  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_first == 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
  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
  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_64BIT)
          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_64BIT)
                          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_64BIT)
                  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_any(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) {
  		kfree(privptr->p_env);
  		privptr->p_env=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->dev=dev;
  				skb_reset_mac_header(skb);
                                  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;
  #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;
  	struct ccw_dev_id dev_id;
  
  #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);
  	ccw_device_get_id(cdev, &dev_id);
  	p_ch->devno = dev_id.devno;
  	if ((p_ch->irb = kzalloc(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;
  	}
  #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;
  	struct ccw_dev_id dev_id;
  
  	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;
  	ccw_device_get_id(cgdev->cdev[READ], &dev_id);
  	p_env->devno[READ] = dev_id.devno;
  	ccw_device_get_id(cgdev->cdev[WRITE], &dev_id);
  	p_env->devno[WRITE] = dev_id.devno;
  	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_any(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);
  	kfree(priv->p_mtc_envelope);
  	priv->p_mtc_envelope=NULL;
  	kfree(priv->p_env);
  	priv->p_env=NULL;
  	kfree(priv->channel[0].irb);
  	priv->channel[0].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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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\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                                                      *
  *---------------------------------------------------------------------*/
  
  
  