git.oblomov.eu Git - linux-2.6/blob - drivers/s390/net/claw.c

   1 /*
   2  *  drivers/s390/net/claw.c
   3  *    ESCON CLAW network driver
   4  *
   5  *  Linux for zSeries version
   6  *    Copyright (C) 2002,2005 IBM Corporation
   7  *  Author(s) Original code written by:
   8  *              Kazuo Iimura (iimura@jp.ibm.com)
   9  *            Rewritten by
  10  *              Andy Richter (richtera@us.ibm.com)
  11  *              Marc Price (mwprice@us.ibm.com)
  12  *
  13  *    sysfs parms:
  14  *   group x.x.rrrr,x.x.wwww
  15  *   read_buffer nnnnnnn
  16  *   write_buffer nnnnnn
  17  *   host_name  aaaaaaaa
  18  *   adapter_name aaaaaaaa
  19  *   api_type    aaaaaaaa
  20  *
  21  *  eg.
  22  *   group  0.0.0200 0.0.0201
  23  *   read_buffer 25
  24  *   write_buffer 20
  25  *   host_name LINUX390
  26  *   adapter_name RS6K
  27  *   api_type     TCPIP
  28  *
  29  *  where
  30  *
  31  *   The device id is decided by the order entries
  32  *   are added to the group the first is claw0 the second claw1
  33  *   up to CLAW_MAX_DEV
  34  *
  35  *   rrrr     - the first of 2 consecutive device addresses used for the
  36  *              CLAW protocol.
  37  *              The specified address is always used as the input (Read)
  38  *              channel and the next address is used as the output channel.
  39  *
  40  *   wwww     - the second of 2 consecutive device addresses used for
  41  *              the CLAW protocol.
  42  *              The specified address is always used as the output
  43  *              channel and the previous address is used as the input channel.
  44  *
  45  *   read_buffer        -       specifies number of input buffers to allocate.
  46  *   write_buffer       -       specifies number of output buffers to allocate.
  47  *   host_name          -       host name
  48  *   adaptor_name       -       adaptor name
  49  *   api_type           -       API type TCPIP or API will be sent and expected
  50  *                              as ws_name
  51  *
  52  *   Note the following requirements:
  53  *   1)  host_name must match the configured adapter_name on the remote side
  54  *   2)  adaptor_name must match the configured host name on the remote side
  55  *
  56  *  Change History
  57  *    1.00  Initial release shipped
  58  *    1.10  Changes for Buffer allocation
  59  *    1.15  Changed for 2.6 Kernel  No longer compiles on 2.4 or lower
  60  *    1.25  Added Packing support
  61  */
  62 #include <asm/bitops.h>
  63 #include <asm/ccwdev.h>
  64 #include <asm/ccwgroup.h>
  65 #include <asm/debug.h>
  66 #include <asm/idals.h>
  67 #include <asm/io.h>
  68
  69 #include <linux/ctype.h>
  70 #include <linux/delay.h>
  71 #include <linux/errno.h>
  72 #include <linux/if_arp.h>
  73 #include <linux/init.h>
  74 #include <linux/interrupt.h>
  75 #include <linux/ip.h>
  76 #include <linux/kernel.h>
  77 #include <linux/module.h>
  78 #include <linux/netdevice.h>
  79 #include <linux/etherdevice.h>
  80 #include <linux/proc_fs.h>
  81 #include <linux/sched.h>
  82 #include <linux/signal.h>
  83 #include <linux/skbuff.h>
  84 #include <linux/slab.h>
  85 #include <linux/string.h>
  86 #include <linux/tcp.h>
  87 #include <linux/timer.h>
  88 #include <linux/types.h>
  89
  90 #include "cu3088.h"
  91 #include "claw.h"
  92
  93 MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
  94 MODULE_DESCRIPTION("Linux for zSeries CLAW Driver\n" \
  95                         "Copyright 2000,2005 IBM Corporation\n");
  96 MODULE_LICENSE("GPL");
  97
  98 /* Debugging is based on DEBUGMSG, IOTRACE, or FUNCTRACE  options:
  99    DEBUGMSG  - Enables output of various debug messages in the code
 100    IOTRACE   - Enables output of CCW and other IO related traces
 101    FUNCTRACE - Enables output of function entry/exit trace
 102    Define any combination of above options to enable tracing
 103
 104    CLAW also uses the s390dbf file system  see claw_trace and claw_setup
 105 */
 106
 107 /* following enables tracing */
 108 //#define DEBUGMSG
 109 //#define IOTRACE
 110 //#define FUNCTRACE
 111
 112 #ifdef DEBUGMSG
 113 #define DEBUG
 114 #endif
 115
 116 #ifdef IOTRACE
 117 #define DEBUG
 118 #endif
 119
 120 #ifdef FUNCTRACE
 121 #define DEBUG
 122 #endif
 123
 124 static char debug_buffer[255];
 125 /**
 126  * Debug Facility Stuff
 127  */
 128 static debug_info_t *claw_dbf_setup;
 129 static debug_info_t *claw_dbf_trace;
 130
 131 /**
 132  *  CLAW Debug Facility functions
 133  */
 134 static void
 135 claw_unregister_debug_facility(void)
 136 {
 137         if (claw_dbf_setup)
 138                 debug_unregister(claw_dbf_setup);
 139         if (claw_dbf_trace)
 140                 debug_unregister(claw_dbf_trace);
 141 }
 142
 143 static int
 144 claw_register_debug_facility(void)
 145 {
 146         claw_dbf_setup = debug_register("claw_setup", 2, 1, 8);
 147         claw_dbf_trace = debug_register("claw_trace", 2, 2, 8);
 148         if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
 149                 printk(KERN_WARNING "Not enough memory for debug facility.\n");
 150                 claw_unregister_debug_facility();
 151                 return -ENOMEM;
 152         }
 153         debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
 154         debug_set_level(claw_dbf_setup, 2);
 155         debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
 156         debug_set_level(claw_dbf_trace, 2);
 157         return 0;
 158 }
 159
 160 static inline void
 161 claw_set_busy(struct net_device *dev)
 162 {
 163  ((struct claw_privbk *) dev->priv)->tbusy=1;
 164  eieio();
 165 }
 166
 167 static inline void
 168 claw_clear_busy(struct net_device *dev)
 169 {
 170         clear_bit(0, &(((struct claw_privbk *) dev->priv)->tbusy));
 171         netif_wake_queue(dev);
 172         eieio();
 173 }
 174
 175 static inline int
 176 claw_check_busy(struct net_device *dev)
 177 {
 178         eieio();
 179         return ((struct claw_privbk *) dev->priv)->tbusy;
 180 }
 181
 182 static inline void
 183 claw_setbit_busy(int nr,struct net_device *dev)
 184 {
 185         netif_stop_queue(dev);
 186         set_bit(nr, (void *)&(((struct claw_privbk *)dev->priv)->tbusy));
 187 }
 188
 189 static inline void
 190 claw_clearbit_busy(int nr,struct net_device *dev)
 191 {
 192         clear_bit(nr,(void *)&(((struct claw_privbk *)dev->priv)->tbusy));
 193         netif_wake_queue(dev);
 194 }
 195
 196 static inline int
 197 claw_test_and_setbit_busy(int nr,struct net_device *dev)
 198 {
 199         netif_stop_queue(dev);
 200         return test_and_set_bit(nr,
 201                 (void *)&(((struct claw_privbk *) dev->priv)->tbusy));
 202 }
 203
 204
 205 /* Functions for the DEV methods */
 206
 207 static int claw_probe(struct ccwgroup_device *cgdev);
 208 static void claw_remove_device(struct ccwgroup_device *cgdev);
 209 static void claw_purge_skb_queue(struct sk_buff_head *q);
 210 static int claw_new_device(struct ccwgroup_device *cgdev);
 211 static int claw_shutdown_device(struct ccwgroup_device *cgdev);
 212 static int claw_tx(struct sk_buff *skb, struct net_device *dev);
 213 static int claw_change_mtu( struct net_device *dev, int new_mtu);
 214 static int claw_open(struct net_device *dev);
 215 static void claw_irq_handler(struct ccw_device *cdev,
 216         unsigned long intparm, struct irb *irb);
 217 static void claw_irq_tasklet ( unsigned long data );
 218 static int claw_release(struct net_device *dev);
 219 static void claw_write_retry ( struct chbk * p_ch );
 220 static void claw_write_next ( struct chbk * p_ch );
 221 static void claw_timer ( struct chbk * p_ch );
 222
 223 /* Functions */
 224 static int add_claw_reads(struct net_device *dev,
 225         struct ccwbk* p_first, struct ccwbk* p_last);
 226 static void ccw_check_return_code (struct ccw_device *cdev, int return_code);
 227 static void ccw_check_unit_check (struct chbk * p_ch, unsigned char sense );
 228 static int find_link(struct net_device *dev, char *host_name, char *ws_name );
 229 static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
 230 static int init_ccw_bk(struct net_device *dev);
 231 static void probe_error( struct ccwgroup_device *cgdev);
 232 static struct net_device_stats *claw_stats(struct net_device *dev);
 233 static int pages_to_order_of_mag(int num_of_pages);
 234 static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
 235 #ifdef DEBUG
 236 static void dumpit (char *buf, int len);
 237 #endif
 238 /* sysfs Functions */
 239 static ssize_t claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf);
 240 static ssize_t claw_hname_write(struct device *dev, struct device_attribute *attr,
 241         const char *buf, size_t count);
 242 static ssize_t claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf);
 243 static ssize_t claw_adname_write(struct device *dev, struct device_attribute *attr,
 244         const char *buf, size_t count);
 245 static ssize_t claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf);
 246 static ssize_t claw_apname_write(struct device *dev, struct device_attribute *attr,
 247         const char *buf, size_t count);
 248 static ssize_t claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
 249 static ssize_t claw_wbuff_write(struct device *dev, struct device_attribute *attr,
 250         const char *buf, size_t count);
 251 static ssize_t claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
 252 static ssize_t claw_rbuff_write(struct device *dev, struct device_attribute *attr,
 253         const char *buf, size_t count);
 254 static int claw_add_files(struct device *dev);
 255 static void claw_remove_files(struct device *dev);
 256
 257 /*   Functions for System Validate  */
 258 static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
 259 static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
 260        __u8 correlator, __u8 rc , char *local_name, char *remote_name);
 261 static int claw_snd_conn_req(struct net_device *dev, __u8 link);
 262 static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
 263 static int claw_snd_sys_validate_rsp(struct net_device *dev,
 264         struct clawctl * p_ctl, __u32 return_code);
 265 static int claw_strt_conn_req(struct net_device *dev );
 266 static void claw_strt_read ( struct net_device *dev, int lock );
 267 static void claw_strt_out_IO( struct net_device *dev );
 268 static void claw_free_wrt_buf( struct net_device *dev );
 269
 270 /* Functions for unpack reads   */
 271 static void unpack_read (struct net_device *dev );
 272
 273 /* ccwgroup table  */
 274
 275 static struct ccwgroup_driver claw_group_driver = {
 276         .owner       = THIS_MODULE,
 277         .name        = "claw",
 278         .max_slaves  = 2,
 279         .driver_id   = 0xC3D3C1E6,
 280         .probe       = claw_probe,
 281         .remove      = claw_remove_device,
 282         .set_online  = claw_new_device,
 283         .set_offline = claw_shutdown_device,
 284 };
 285
 286 /*
 287 *
 288 *       Key functions
 289 */
 290
 291 /*----------------------------------------------------------------*
 292  *   claw_probe                                                   *
 293  *      this function is called for each CLAW device.             *
 294  *----------------------------------------------------------------*/
 295 static int
 296 claw_probe(struct ccwgroup_device *cgdev)
 297 {
 298         int             rc;
 299         struct claw_privbk *privptr=NULL;
 300
 301 #ifdef FUNCTRACE
 302         printk(KERN_INFO "%s Enter\n",__FUNCTION__);
 303 #endif
 304         CLAW_DBF_TEXT(2,setup,"probe");
 305         if (!get_device(&cgdev->dev))
 306                 return -ENODEV;
 307 #ifdef DEBUGMSG
 308         printk(KERN_INFO "claw: variable cgdev =\n");
 309         dumpit((char *)cgdev, sizeof(struct ccwgroup_device));
 310 #endif
 311         privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL);
 312         if (privptr == NULL) {
 313                 probe_error(cgdev);
 314                 put_device(&cgdev->dev);
 315                 printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
 316                         cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
 317                 CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
 318                 return -ENOMEM;
 319         }
 320         privptr->p_mtc_envelope= kmalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
 321         privptr->p_env = kmalloc(sizeof(struct claw_env), GFP_KERNEL);
 322         if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
 323                 probe_error(cgdev);
 324                 put_device(&cgdev->dev);
 325                 printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
 326                         cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
 327                 CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
 328                 return -ENOMEM;
 329         }
 330         memset(privptr->p_mtc_envelope, 0x00, MAX_ENVELOPE_SIZE);
 331         memset(privptr->p_env, 0x00, sizeof(struct claw_env));
 332         memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
 333         memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
 334         memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
 335         privptr->p_env->packing = 0;
 336         privptr->p_env->write_buffers = 5;
 337         privptr->p_env->read_buffers = 5;
 338         privptr->p_env->read_size = CLAW_FRAME_SIZE;
 339         privptr->p_env->write_size = CLAW_FRAME_SIZE;
 340         rc = claw_add_files(&cgdev->dev);
 341         if (rc) {
 342                 probe_error(cgdev);
 343                 put_device(&cgdev->dev);
 344                 printk(KERN_WARNING "add_files failed %s %s Exit Line %d \n",
 345                         cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
 346                 CLAW_DBF_TEXT_(2,setup,"probex%d",rc);
 347                 return rc;
 348         }
 349         printk(KERN_INFO "claw: sysfs files added for %s\n",cgdev->cdev[0]->dev.bus_id);
 350         privptr->p_env->p_priv = privptr;
 351         cgdev->cdev[0]->handler = claw_irq_handler;
 352         cgdev->cdev[1]->handler = claw_irq_handler;
 353         cgdev->dev.driver_data = privptr;
 354 #ifdef FUNCTRACE
 355         printk(KERN_INFO "claw:%s exit on line %d, "
 356                 "rc = 0\n",__FUNCTION__,__LINE__);
 357 #endif
 358         CLAW_DBF_TEXT(2,setup,"prbext 0");
 359
 360         return 0;
 361 }  /*  end of claw_probe       */
 362
 363 /*-------------------------------------------------------------------*
 364  *   claw_tx                                                         *
 365  *-------------------------------------------------------------------*/
 366
 367 static int
 368 claw_tx(struct sk_buff *skb, struct net_device *dev)
 369 {
 370         int             rc;
 371         struct claw_privbk *privptr=dev->priv;
 372         unsigned long saveflags;
 373         struct chbk *p_ch;
 374
 375 #ifdef FUNCTRACE
 376         printk(KERN_INFO "%s:%s enter\n",dev->name,__FUNCTION__);
 377 #endif
 378         CLAW_DBF_TEXT(4,trace,"claw_tx");
 379         p_ch=&privptr->channel[WRITE];
 380         if (skb == NULL) {
 381                 printk(KERN_WARNING "%s: null pointer passed as sk_buffer\n",
 382                         dev->name);
 383                 privptr->stats.tx_dropped++;
 384 #ifdef FUNCTRACE
 385                 printk(KERN_INFO "%s: %s() exit on line %d, rc = EIO\n",
 386                         dev->name,__FUNCTION__, __LINE__);
 387 #endif
 388                 CLAW_DBF_TEXT_(2,trace,"clawtx%d",-EIO);
 389                 return -EIO;
 390         }
 391
 392 #ifdef IOTRACE
 393         printk(KERN_INFO "%s: variable sk_buff=\n",dev->name);
 394         dumpit((char *) skb, sizeof(struct sk_buff));
 395         printk(KERN_INFO "%s: variable dev=\n",dev->name);
 396         dumpit((char *) dev, sizeof(struct net_device));
 397 #endif
 398         spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
 399         rc=claw_hw_tx( skb, dev, 1 );
 400         spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
 401 #ifdef FUNCTRACE
 402         printk(KERN_INFO "%s:%s exit on line %d, rc = %d\n",
 403                 dev->name, __FUNCTION__, __LINE__, rc);
 404 #endif
 405         CLAW_DBF_TEXT_(4,trace,"clawtx%d",rc);
 406         return rc;
 407 }   /*  end of claw_tx */
 408
 409 /*------------------------------------------------------------------*
 410  *  pack the collect queue into an skb and return it                *
 411  *   If not packing just return the top skb from the queue          *
 412  *------------------------------------------------------------------*/
 413
 414 static struct sk_buff *
 415 claw_pack_skb(struct claw_privbk *privptr)
 416 {
 417         struct sk_buff *new_skb,*held_skb;
 418         struct chbk *p_ch = &privptr->channel[WRITE];
 419         struct claw_env  *p_env = privptr->p_env;
 420         int     pkt_cnt,pk_ind,so_far;
 421
 422         new_skb = NULL;         /* assume no dice */
 423         pkt_cnt = 0;
 424         CLAW_DBF_TEXT(4,trace,"PackSKBe");
 425         if (!skb_queue_empty(&p_ch->collect_queue)) {
 426         /* some data */
 427                 held_skb = skb_dequeue(&p_ch->collect_queue);
 428                 if (held_skb)
 429                         dev_kfree_skb_any(held_skb);
 430                 else
 431                         return NULL;
 432                 if (p_env->packing != DO_PACKED)
 433                         return held_skb;
 434                 /* get a new SKB we will pack at least one */
 435                 new_skb = dev_alloc_skb(p_env->write_size);
 436                 if (new_skb == NULL) {
 437                         atomic_inc(&held_skb->users);
 438                         skb_queue_head(&p_ch->collect_queue,held_skb);
 439                         return NULL;
 440                 }
 441                 /* we have packed packet and a place to put it  */
 442                 pk_ind = 1;
 443                 so_far = 0;
 444                 new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
 445                 while ((pk_ind) && (held_skb != NULL)) {
 446                         if (held_skb->len+so_far <= p_env->write_size-8) {
 447                                 memcpy(skb_put(new_skb,held_skb->len),
 448                                         held_skb->data,held_skb->len);
 449                                 privptr->stats.tx_packets++;
 450                                 so_far += held_skb->len;
 451                                 pkt_cnt++;
 452                                 dev_kfree_skb_any(held_skb);
 453                                 held_skb = skb_dequeue(&p_ch->collect_queue);
 454                                 if (held_skb)
 455                                         atomic_dec(&held_skb->users);
 456                         } else {
 457                                 pk_ind = 0;
 458                                 atomic_inc(&held_skb->users);
 459                                 skb_queue_head(&p_ch->collect_queue,held_skb);
 460                         }
 461                 }
 462 #ifdef IOTRACE
 463                 printk(KERN_INFO "%s: %s() Packed %d len %d\n",
 464                         p_env->ndev->name,
 465                         __FUNCTION__,pkt_cnt,new_skb->len);
 466 #endif
 467         }
 468         CLAW_DBF_TEXT(4,trace,"PackSKBx");
 469         return new_skb;
 470 }
 471
 472 /*-------------------------------------------------------------------*
 473  *   claw_change_mtu                                                 *
 474  *                                                                   *
 475  *-------------------------------------------------------------------*/
 476
 477 static int
 478 claw_change_mtu(struct net_device *dev, int new_mtu)
 479 {
 480         struct claw_privbk  *privptr=dev->priv;
 481         int buff_size;
 482 #ifdef FUNCTRACE
 483         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
 484 #endif
 485 #ifdef DEBUGMSG
 486         printk(KERN_INFO "variable dev =\n");
 487         dumpit((char *) dev, sizeof(struct net_device));
 488         printk(KERN_INFO "variable new_mtu = %d\n", new_mtu);
 489 #endif
 490         CLAW_DBF_TEXT(4,trace,"setmtu");
 491         buff_size = privptr->p_env->write_size;
 492         if ((new_mtu < 60) || (new_mtu > buff_size)) {
 493 #ifdef FUNCTRACE
 494                 printk(KERN_INFO "%s:%s Exit on line %d, rc=EINVAL\n",
 495                 dev->name,
 496                 __FUNCTION__, __LINE__);
 497 #endif
 498                 return -EINVAL;
 499         }
 500         dev->mtu = new_mtu;
 501 #ifdef FUNCTRACE
 502         printk(KERN_INFO "%s:%s Exit on line %d\n",dev->name,
 503         __FUNCTION__, __LINE__);
 504 #endif
 505         return 0;
 506 }  /*   end of claw_change_mtu */
 507
 508
 509 /*-------------------------------------------------------------------*
 510  *   claw_open                                                       *
 511  *                                                                   *
 512  *-------------------------------------------------------------------*/
 513 static int
 514 claw_open(struct net_device *dev)
 515 {
 516
 517         int     rc;
 518         int     i;
 519         unsigned long       saveflags=0;
 520         unsigned long       parm;
 521         struct claw_privbk  *privptr;
 522         DECLARE_WAITQUEUE(wait, current);
 523         struct timer_list  timer;
 524         struct ccwbk *p_buf;
 525
 526 #ifdef FUNCTRACE
 527         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
 528 #endif
 529         CLAW_DBF_TEXT(4,trace,"open");
 530         if (!dev || (dev->name[0] == 0x00)) {
 531                 CLAW_DBF_TEXT(2,trace,"BadDev");
 532                 printk(KERN_WARNING "claw: Bad device at open failing \n");
 533                 return -ENODEV;
 534         }
 535         privptr = (struct claw_privbk *)dev->priv;
 536         /*   allocate and initialize CCW blocks */
 537         if (privptr->buffs_alloc == 0) {
 538                 rc=init_ccw_bk(dev);
 539                 if (rc) {
 540                         printk(KERN_INFO "%s:%s Exit on line %d, rc=ENOMEM\n",
 541                         dev->name,
 542                         __FUNCTION__, __LINE__);
 543                         CLAW_DBF_TEXT(2,trace,"openmem");
 544                         return -ENOMEM;
 545                 }
 546         }
 547         privptr->system_validate_comp=0;
 548         privptr->release_pend=0;
 549         if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
 550                 privptr->p_env->read_size=DEF_PACK_BUFSIZE;
 551                 privptr->p_env->write_size=DEF_PACK_BUFSIZE;
 552                 privptr->p_env->packing=PACKING_ASK;
 553         } else {
 554                 privptr->p_env->packing=0;
 555                 privptr->p_env->read_size=CLAW_FRAME_SIZE;
 556                 privptr->p_env->write_size=CLAW_FRAME_SIZE;
 557         }
 558         claw_set_busy(dev);
 559         tasklet_init(&privptr->channel[READ].tasklet, claw_irq_tasklet,
 560                 (unsigned long) &privptr->channel[READ]);
 561         for ( i = 0; i < 2;  i++) {
 562                 CLAW_DBF_TEXT_(2,trace,"opn_ch%d",i);
 563                 init_waitqueue_head(&privptr->channel[i].wait);
 564                 /* skb_queue_head_init(&p_ch->io_queue); */
 565                 if (i == WRITE)
 566                         skb_queue_head_init(
 567                                 &privptr->channel[WRITE].collect_queue);
 568                 privptr->channel[i].flag_a = 0;
 569                 privptr->channel[i].IO_active = 0;
 570                 privptr->channel[i].flag  &= ~CLAW_TIMER;
 571                 init_timer(&timer);
 572                 timer.function = (void *)claw_timer;
 573                 timer.data = (unsigned long)(&privptr->channel[i]);
 574                 timer.expires = jiffies + 15*HZ;
 575                 add_timer(&timer);
 576                 spin_lock_irqsave(get_ccwdev_lock(
 577                         privptr->channel[i].cdev), saveflags);
 578                 parm = (unsigned long) &privptr->channel[i];
 579                 privptr->channel[i].claw_state = CLAW_START_HALT_IO;
 580                 rc = 0;
 581                 add_wait_queue(&privptr->channel[i].wait, &wait);
 582                 rc = ccw_device_halt(
 583                         (struct ccw_device *)privptr->channel[i].cdev,parm);
 584                 set_current_state(TASK_INTERRUPTIBLE);
 585                 spin_unlock_irqrestore(
 586                         get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
 587                 schedule();
 588                 set_current_state(TASK_RUNNING);
 589                 remove_wait_queue(&privptr->channel[i].wait, &wait);
 590                 if(rc != 0)
 591                         ccw_check_return_code(privptr->channel[i].cdev, rc);
 592                 if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
 593                         del_timer(&timer);
 594         }
 595         if ((((privptr->channel[READ].last_dstat |
 596                 privptr->channel[WRITE].last_dstat) &
 597            ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
 598            (((privptr->channel[READ].flag |
 599                 privptr->channel[WRITE].flag) & CLAW_TIMER) != 0x00)) {
 600 #ifdef DEBUGMSG
 601                 printk(KERN_INFO "%s: channel problems during open - read:"
 602                         " %02x -  write: %02x\n",
 603                         dev->name,
 604                         privptr->channel[READ].last_dstat,
 605                         privptr->channel[WRITE].last_dstat);
 606 #endif
 607                 printk(KERN_INFO "%s: remote side is not ready\n", dev->name);
 608                 CLAW_DBF_TEXT(2,trace,"notrdy");
 609
 610                 for ( i = 0; i < 2;  i++) {
 611                         spin_lock_irqsave(
 612                                 get_ccwdev_lock(privptr->channel[i].cdev),
 613                                 saveflags);
 614                         parm = (unsigned long) &privptr->channel[i];
 615                         privptr->channel[i].claw_state = CLAW_STOP;
 616                         rc = ccw_device_halt(
 617                                 (struct ccw_device *)&privptr->channel[i].cdev,
 618                                 parm);
 619                         spin_unlock_irqrestore(
 620                                 get_ccwdev_lock(privptr->channel[i].cdev),
 621                                 saveflags);
 622                         if (rc != 0) {
 623                                 ccw_check_return_code(
 624                                         privptr->channel[i].cdev, rc);
 625                         }
 626                 }
 627                 free_pages((unsigned long)privptr->p_buff_ccw,
 628                         (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
 629                 if (privptr->p_env->read_size < PAGE_SIZE) {
 630                         free_pages((unsigned long)privptr->p_buff_read,
 631                                (int)pages_to_order_of_mag(
 632                                         privptr->p_buff_read_num));
 633                 }
 634                 else {
 635                         p_buf=privptr->p_read_active_first;
 636                         while (p_buf!=NULL) {
 637                                 free_pages((unsigned long)p_buf->p_buffer,
 638                                       (int)pages_to_order_of_mag(
 639                                         privptr->p_buff_pages_perread ));
 640                                 p_buf=p_buf->next;
 641                         }
 642                 }
 643                 if (privptr->p_env->write_size < PAGE_SIZE ) {
 644                         free_pages((unsigned long)privptr->p_buff_write,
 645                              (int)pages_to_order_of_mag(
 646                                 privptr->p_buff_write_num));
 647                 }
 648                 else {
 649                         p_buf=privptr->p_write_active_first;
 650                         while (p_buf!=NULL) {
 651                                 free_pages((unsigned long)p_buf->p_buffer,
 652                                      (int)pages_to_order_of_mag(
 653                                         privptr->p_buff_pages_perwrite ));
 654                                 p_buf=p_buf->next;
 655                         }
 656                 }
 657                 privptr->buffs_alloc = 0;
 658                 privptr->channel[READ].flag= 0x00;
 659                 privptr->channel[WRITE].flag = 0x00;
 660                 privptr->p_buff_ccw=NULL;
 661                 privptr->p_buff_read=NULL;
 662                 privptr->p_buff_write=NULL;
 663                 claw_clear_busy(dev);
 664 #ifdef FUNCTRACE
 665                 printk(KERN_INFO "%s:%s Exit on line %d, rc=EIO\n",
 666                 dev->name,__FUNCTION__,__LINE__);
 667 #endif
 668                 CLAW_DBF_TEXT(2,trace,"open EIO");
 669                 return -EIO;
 670         }
 671
 672         /*   Send SystemValidate command */
 673
 674         claw_clear_busy(dev);
 675
 676 #ifdef FUNCTRACE
 677         printk(KERN_INFO "%s:%s Exit on line %d, rc=0\n",
 678                 dev->name,__FUNCTION__,__LINE__);
 679 #endif
 680         CLAW_DBF_TEXT(4,trace,"openok");
 681         return 0;
 682 }    /*     end of claw_open    */
 683
 684 /*-------------------------------------------------------------------*
 685 *                                                                    *
 686 *       claw_irq_handler                                             *
 687 *                                                                    *
 688 *--------------------------------------------------------------------*/
 689 static void
 690 claw_irq_handler(struct ccw_device *cdev,
 691         unsigned long intparm, struct irb *irb)
 692 {
 693         struct chbk *p_ch = NULL;
 694         struct claw_privbk *privptr = NULL;
 695         struct net_device *dev = NULL;
 696         struct claw_env  *p_env;
 697         struct chbk *p_ch_r=NULL;
 698
 699
 700 #ifdef FUNCTRACE
 701         printk(KERN_INFO "%s enter  \n",__FUNCTION__);
 702 #endif
 703         CLAW_DBF_TEXT(4,trace,"clawirq");
 704         /* Bypass all 'unsolicited interrupts' */
 705         if (!cdev->dev.driver_data) {
 706                 printk(KERN_WARNING "claw: unsolicited interrupt for device:"
 707                         "%s received c-%02x d-%02x\n",
 708                         cdev->dev.bus_id,irb->scsw.cstat, irb->scsw.dstat);
 709 #ifdef FUNCTRACE
 710                 printk(KERN_INFO "claw: %s() "
 711                         "exit on line %d\n",__FUNCTION__,__LINE__);
 712 #endif
 713                 CLAW_DBF_TEXT(2,trace,"badirq");
 714                 return;
 715         }
 716         privptr = (struct claw_privbk *)cdev->dev.driver_data;
 717
 718         /* Try to extract channel from driver data. */
 719         if (privptr->channel[READ].cdev == cdev)
 720                 p_ch = &privptr->channel[READ];
 721         else if (privptr->channel[WRITE].cdev == cdev)
 722                 p_ch = &privptr->channel[WRITE];
 723         else {
 724                 printk(KERN_WARNING "claw: Can't determine channel for "
 725                         "interrupt, device %s\n", cdev->dev.bus_id);
 726                 CLAW_DBF_TEXT(2,trace,"badchan");
 727                 return;
 728         }
 729         CLAW_DBF_TEXT_(4,trace,"IRQCH=%d",p_ch->flag);
 730
 731         dev = (struct net_device *) (p_ch->ndev);
 732         p_env=privptr->p_env;
 733
 734 #ifdef IOTRACE
 735         printk(KERN_INFO "%s: interrupt for device: %04x "
 736                 "received c-%02x d-%02x state-%02x\n",
 737                 dev->name, p_ch->devno, irb->scsw.cstat,
 738                 irb->scsw.dstat, p_ch->claw_state);
 739 #endif
 740
 741         /* Copy interruption response block. */
 742         memcpy(p_ch->irb, irb, sizeof(struct irb));
 743
 744         /* Check for good subchannel return code, otherwise error message */
 745         if (irb->scsw.cstat  &&  !(irb->scsw.cstat & SCHN_STAT_PCI)) {
 746                 printk(KERN_INFO "%s: subchannel check for device: %04x -"
 747                         " Sch Stat %02x  Dev Stat %02x CPA - %04x\n",
 748                         dev->name, p_ch->devno,
 749                         irb->scsw.cstat, irb->scsw.dstat,irb->scsw.cpa);
 750 #ifdef IOTRACE
 751                 dumpit((char *)irb,sizeof(struct irb));
 752                 dumpit((char *)(unsigned long)irb->scsw.cpa,
 753                         sizeof(struct ccw1));
 754 #endif
 755 #ifdef FUNCTRACE
 756                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 757                 dev->name,__FUNCTION__,__LINE__);
 758 #endif
 759                 CLAW_DBF_TEXT(2,trace,"chanchk");
 760                 /* return; */
 761         }
 762
 763         /* Check the reason-code of a unit check */
 764         if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
 765                 ccw_check_unit_check(p_ch, irb->ecw[0]);
 766         }
 767
 768         /* State machine to bring the connection up, down and to restart */
 769         p_ch->last_dstat = irb->scsw.dstat;
 770
 771         switch (p_ch->claw_state) {
 772                 case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
 773 #ifdef DEBUGMSG
 774                         printk(KERN_INFO "%s: CLAW_STOP enter\n", dev->name);
 775 #endif
 776                         if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
 777                         (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
 778                         (p_ch->irb->scsw.stctl ==
 779                         (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
 780 #ifdef FUNCTRACE
 781                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 782                                         dev->name,__FUNCTION__,__LINE__);
 783 #endif
 784                                 return;
 785                         }
 786                         wake_up(&p_ch->wait);   /* wake up claw_release */
 787
 788 #ifdef DEBUGMSG
 789                         printk(KERN_INFO "%s: CLAW_STOP exit\n", dev->name);
 790 #endif
 791 #ifdef FUNCTRACE
 792                         printk(KERN_INFO "%s:%s Exit on line %d\n",
 793                                 dev->name,__FUNCTION__,__LINE__);
 794 #endif
 795                         CLAW_DBF_TEXT(4,trace,"stop");
 796                         return;
 797
 798                 case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open  */
 799 #ifdef DEBUGMSG
 800                         printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO\n",
 801                                 dev->name);
 802 #endif
 803                         if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
 804                         (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
 805                         (p_ch->irb->scsw.stctl ==
 806                         (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
 807 #ifdef FUNCTRACE
 808                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 809                                         dev->name,__FUNCTION__,__LINE__);
 810 #endif
 811                                 CLAW_DBF_TEXT(4,trace,"haltio");
 812                                 return;
 813                         }
 814                         if (p_ch->flag == CLAW_READ) {
 815                                 p_ch->claw_state = CLAW_START_READ;
 816                                 wake_up(&p_ch->wait); /* wake claw_open (READ)*/
 817                         }
 818                         else
 819                            if (p_ch->flag == CLAW_WRITE) {
 820                                 p_ch->claw_state = CLAW_START_WRITE;
 821                                 /*      send SYSTEM_VALIDATE                    */
 822                                 claw_strt_read(dev, LOCK_NO);
 823                                 claw_send_control(dev,
 824                                         SYSTEM_VALIDATE_REQUEST,
 825                                         0, 0, 0,
 826                                         p_env->host_name,
 827                                         p_env->adapter_name );
 828                         } else {
 829                                 printk(KERN_WARNING "claw: unsolicited "
 830                                         "interrupt for device:"
 831                                         "%s received c-%02x d-%02x\n",
 832                                         cdev->dev.bus_id,
 833                                         irb->scsw.cstat,
 834                                         irb->scsw.dstat);
 835                                 return;
 836                                 }
 837 #ifdef DEBUGMSG
 838                         printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO exit\n",
 839                                 dev->name);
 840 #endif
 841 #ifdef FUNCTRACE
 842                         printk(KERN_INFO "%s:%s Exit on line %d\n",
 843                                 dev->name,__FUNCTION__,__LINE__);
 844 #endif
 845                         CLAW_DBF_TEXT(4,trace,"haltio");
 846                         return;
 847                 case CLAW_START_READ:
 848                         CLAW_DBF_TEXT(4,trace,"ReadIRQ");
 849                         if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
 850                                 clear_bit(0, (void *)&p_ch->IO_active);
 851                                 if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
 852                                     (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
 853                                     (p_ch->irb->ecw[0])        == 0)
 854                                 {
 855                                         privptr->stats.rx_errors++;
 856                                         printk(KERN_INFO "%s: Restart is "
 857                                                 "required after remote "
 858                                                 "side recovers \n",
 859                                                 dev->name);
 860                                 }
 861 #ifdef FUNCTRACE
 862                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 863                                         dev->name,__FUNCTION__,__LINE__);
 864 #endif
 865                                         CLAW_DBF_TEXT(4,trace,"notrdy");
 866                                         return;
 867                         }
 868                         if ((p_ch->irb->scsw.cstat & SCHN_STAT_PCI) &&
 869                             (p_ch->irb->scsw.dstat==0)) {
 870                                 if (test_and_set_bit(CLAW_BH_ACTIVE,
 871                                         (void *)&p_ch->flag_a) == 0) {
 872                                         tasklet_schedule(&p_ch->tasklet);
 873                                 }
 874                                 else {
 875                                         CLAW_DBF_TEXT(4,trace,"PCINoBH");
 876                                 }
 877 #ifdef FUNCTRACE
 878                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 879                                         dev->name,__FUNCTION__,__LINE__);
 880 #endif
 881                                 CLAW_DBF_TEXT(4,trace,"PCI_read");
 882                                 return;
 883                         }
 884                         if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
 885                          (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
 886                          (p_ch->irb->scsw.stctl ==
 887                          (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
 888 #ifdef FUNCTRACE
 889                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 890                                         dev->name,__FUNCTION__,__LINE__);
 891 #endif
 892                                 CLAW_DBF_TEXT(4,trace,"SPend_rd");
 893                                 return;
 894                         }
 895                         clear_bit(0, (void *)&p_ch->IO_active);
 896                         claw_clearbit_busy(TB_RETRY,dev);
 897                         if (test_and_set_bit(CLAW_BH_ACTIVE,
 898                                 (void *)&p_ch->flag_a) == 0) {
 899                                 tasklet_schedule(&p_ch->tasklet);
 900                          }
 901                         else {
 902                                 CLAW_DBF_TEXT(4,trace,"RdBHAct");
 903                         }
 904
 905 #ifdef DEBUGMSG
 906                         printk(KERN_INFO "%s: process CLAW_START_READ exit\n",
 907                                 dev->name);
 908 #endif
 909 #ifdef FUNCTRACE
 910                         printk(KERN_INFO "%s:%s Exit on line %d\n",
 911                                 dev->name,__FUNCTION__,__LINE__);
 912 #endif
 913                         CLAW_DBF_TEXT(4,trace,"RdIRQXit");
 914                         return;
 915                 case CLAW_START_WRITE:
 916                         if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
 917                                 printk(KERN_INFO "%s: Unit Check Occured in "
 918                                         "write channel\n",dev->name);
 919                                 clear_bit(0, (void *)&p_ch->IO_active);
 920                                 if (p_ch->irb->ecw[0] & 0x80 ) {
 921                                         printk(KERN_INFO "%s: Resetting Event "
 922                                                 "occurred:\n",dev->name);
 923                                         init_timer(&p_ch->timer);
 924                                         p_ch->timer.function =
 925                                                 (void *)claw_write_retry;
 926                                         p_ch->timer.data = (unsigned long)p_ch;
 927                                         p_ch->timer.expires = jiffies + 10*HZ;
 928                                         add_timer(&p_ch->timer);
 929                                         printk(KERN_INFO "%s: write connection "
 930                                                 "restarting\n",dev->name);
 931                                 }
 932 #ifdef FUNCTRACE
 933                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 934                                         dev->name,__FUNCTION__,__LINE__);
 935 #endif
 936                                 CLAW_DBF_TEXT(4,trace,"rstrtwrt");
 937                                 return;
 938                         }
 939                         if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) {
 940                                         clear_bit(0, (void *)&p_ch->IO_active);
 941                                         printk(KERN_INFO "%s: Unit Exception "
 942                                                 "Occured in write channel\n",
 943                                                 dev->name);
 944                         }
 945                         if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
 946                         (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
 947                         (p_ch->irb->scsw.stctl ==
 948                         (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
 949 #ifdef FUNCTRACE
 950                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 951                                         dev->name,__FUNCTION__,__LINE__);
 952 #endif
 953                                 CLAW_DBF_TEXT(4,trace,"writeUE");
 954                                 return;
 955                         }
 956                         clear_bit(0, (void *)&p_ch->IO_active);
 957                         if (claw_test_and_setbit_busy(TB_TX,dev)==0) {
 958                                 claw_write_next(p_ch);
 959                                 claw_clearbit_busy(TB_TX,dev);
 960                                 claw_clear_busy(dev);
 961                         }
 962                         p_ch_r=(struct chbk *)&privptr->channel[READ];
 963                         if (test_and_set_bit(CLAW_BH_ACTIVE,
 964                                         (void *)&p_ch_r->flag_a) == 0) {
 965                                 tasklet_schedule(&p_ch_r->tasklet);
 966                         }
 967
 968 #ifdef DEBUGMSG
 969                         printk(KERN_INFO "%s: process CLAW_START_WRITE exit\n",
 970                                  dev->name);
 971 #endif
 972 #ifdef FUNCTRACE
 973                         printk(KERN_INFO "%s:%s Exit on line %d\n",
 974                                 dev->name,__FUNCTION__,__LINE__);
 975 #endif
 976                         CLAW_DBF_TEXT(4,trace,"StWtExit");
 977                         return;
 978                 default:
 979                         printk(KERN_WARNING "%s: wrong selection code - irq "
 980                                 "state=%d\n",dev->name,p_ch->claw_state);
 981 #ifdef FUNCTRACE
 982                         printk(KERN_INFO "%s:%s Exit on line %d\n",
 983                                 dev->name,__FUNCTION__,__LINE__);
 984 #endif
 985                         CLAW_DBF_TEXT(2,trace,"badIRQ");
 986                         return;
 987         }
 988
 989 }       /*   end of claw_irq_handler    */
 990
 991
 992 /*-------------------------------------------------------------------*
 993 *       claw_irq_tasklet                                             *
 994 *                                                                    *
 995 *--------------------------------------------------------------------*/
 996 static void
 997 claw_irq_tasklet ( unsigned long data )
 998 {
 999         struct chbk * p_ch;
1000         struct net_device  *dev;
1001         struct claw_privbk *       privptr;
1002
1003         p_ch = (struct chbk *) data;
1004         dev = (struct net_device *)p_ch->ndev;
1005 #ifdef FUNCTRACE
1006         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
1007 #endif
1008 #ifdef DEBUGMSG
1009         printk(KERN_INFO "%s: variable p_ch =\n",dev->name);
1010         dumpit((char *) p_ch, sizeof(struct chbk));
1011 #endif
1012         CLAW_DBF_TEXT(4,trace,"IRQtask");
1013
1014         privptr = (struct claw_privbk *) dev->priv;
1015
1016 #ifdef DEBUGMSG
1017         printk(KERN_INFO "%s: bh routine - state-%02x\n" ,
1018                 dev->name, p_ch->claw_state);
1019 #endif
1020
1021         unpack_read(dev);
1022         clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
1023         CLAW_DBF_TEXT(4,trace,"TskletXt");
1024 #ifdef FUNCTRACE
1025         printk(KERN_INFO "%s:%s Exit on line %d\n",
1026                 dev->name,__FUNCTION__,__LINE__);
1027 #endif
1028         return;
1029 }       /*    end of claw_irq_bh    */
1030
1031 /*-------------------------------------------------------------------*
1032 *       claw_release                                                 *
1033 *                                                                    *
1034 *--------------------------------------------------------------------*/
1035 static int
1036 claw_release(struct net_device *dev)
1037 {
1038         int                rc;
1039         int                i;
1040         unsigned long      saveflags;
1041         unsigned long      parm;
1042         struct claw_privbk *privptr;
1043         DECLARE_WAITQUEUE(wait, current);
1044         struct ccwbk*             p_this_ccw;
1045         struct ccwbk*             p_buf;
1046
1047         if (!dev)
1048                 return 0;
1049         privptr = (struct claw_privbk *) dev->priv;
1050         if (!privptr)
1051                 return 0;
1052 #ifdef FUNCTRACE
1053         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
1054 #endif
1055         CLAW_DBF_TEXT(4,trace,"release");
1056 #ifdef DEBUGMSG
1057         printk(KERN_INFO "%s: variable dev =\n",dev->name);
1058         dumpit((char *) dev, sizeof(struct net_device));
1059         printk(KERN_INFO "Priv Buffalloc %d\n",privptr->buffs_alloc);
1060         printk(KERN_INFO "Priv p_buff_ccw = %p\n",&privptr->p_buff_ccw);
1061 #endif
1062         privptr->release_pend=1;
1063         claw_setbit_busy(TB_STOP,dev);
1064         for ( i = 1; i >=0 ;  i--) {
1065                 spin_lock_irqsave(
1066                         get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
1067              /*   del_timer(&privptr->channel[READ].timer);  */
1068                 privptr->channel[i].claw_state = CLAW_STOP;
1069                 privptr->channel[i].IO_active = 0;
1070                 parm = (unsigned long) &privptr->channel[i];
1071                 if (i == WRITE)
1072                         claw_purge_skb_queue(
1073                                 &privptr->channel[WRITE].collect_queue);
1074                 rc = ccw_device_halt (privptr->channel[i].cdev, parm);
1075                 if (privptr->system_validate_comp==0x00)  /* never opened? */
1076                    init_waitqueue_head(&privptr->channel[i].wait);
1077                 add_wait_queue(&privptr->channel[i].wait, &wait);
1078                 set_current_state(TASK_INTERRUPTIBLE);
1079                 spin_unlock_irqrestore(
1080                         get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
1081                 schedule();
1082                 set_current_state(TASK_RUNNING);
1083                 remove_wait_queue(&privptr->channel[i].wait, &wait);
1084                 if (rc != 0) {
1085                         ccw_check_return_code(privptr->channel[i].cdev, rc);
1086                 }
1087         }
1088         if (privptr->pk_skb != NULL) {
1089                 dev_kfree_skb_any(privptr->pk_skb);
1090                 privptr->pk_skb = NULL;
1091         }
1092         if(privptr->buffs_alloc != 1) {
1093 #ifdef FUNCTRACE
1094         printk(KERN_INFO "%s:%s Exit on line %d\n",
1095                 dev->name,__FUNCTION__,__LINE__);
1096 #endif
1097                 CLAW_DBF_TEXT(4,trace,"none2fre");
1098                 return 0;
1099         }
1100         CLAW_DBF_TEXT(4,trace,"freebufs");
1101         if (privptr->p_buff_ccw != NULL) {
1102                 free_pages((unsigned long)privptr->p_buff_ccw,
1103                         (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
1104         }
1105         CLAW_DBF_TEXT(4,trace,"freeread");
1106         if (privptr->p_env->read_size < PAGE_SIZE) {
1107             if (privptr->p_buff_read != NULL) {
1108                 free_pages((unsigned long)privptr->p_buff_read,
1109                       (int)pages_to_order_of_mag(privptr->p_buff_read_num));
1110                 }
1111         }
1112         else {
1113                 p_buf=privptr->p_read_active_first;
1114                 while (p_buf!=NULL) {
1115                         free_pages((unsigned long)p_buf->p_buffer,
1116                              (int)pages_to_order_of_mag(
1117                                 privptr->p_buff_pages_perread ));
1118                         p_buf=p_buf->next;
1119                 }
1120         }
1121          CLAW_DBF_TEXT(4,trace,"freewrit");
1122         if (privptr->p_env->write_size < PAGE_SIZE ) {
1123                 free_pages((unsigned long)privptr->p_buff_write,
1124                       (int)pages_to_order_of_mag(privptr->p_buff_write_num));
1125         }
1126         else {
1127                 p_buf=privptr->p_write_active_first;
1128                 while (p_buf!=NULL) {
1129                         free_pages((unsigned long)p_buf->p_buffer,
1130                               (int)pages_to_order_of_mag(
1131                               privptr->p_buff_pages_perwrite ));
1132                         p_buf=p_buf->next;
1133                 }
1134         }
1135          CLAW_DBF_TEXT(4,trace,"clearptr");
1136         privptr->buffs_alloc = 0;
1137         privptr->p_buff_ccw=NULL;
1138         privptr->p_buff_read=NULL;
1139         privptr->p_buff_write=NULL;
1140         privptr->system_validate_comp=0;
1141         privptr->release_pend=0;
1142         /*      Remove any writes that were pending and reset all reads   */
1143         p_this_ccw=privptr->p_read_active_first;
1144         while (p_this_ccw!=NULL) {
1145                 p_this_ccw->header.length=0xffff;
1146                 p_this_ccw->header.opcode=0xff;
1147                 p_this_ccw->header.flag=0x00;
1148                 p_this_ccw=p_this_ccw->next;
1149         }
1150
1151         while (privptr->p_write_active_first!=NULL) {
1152                 p_this_ccw=privptr->p_write_active_first;
1153                 p_this_ccw->header.flag=CLAW_PENDING;
1154                 privptr->p_write_active_first=p_this_ccw->next;
1155                 p_this_ccw->next=privptr->p_write_free_chain;
1156                 privptr->p_write_free_chain=p_this_ccw;
1157                 ++privptr->write_free_count;
1158         }
1159         privptr->p_write_active_last=NULL;
1160         privptr->mtc_logical_link = -1;
1161         privptr->mtc_skipping = 1;
1162         privptr->mtc_offset=0;
1163
1164         if (((privptr->channel[READ].last_dstat |
1165                 privptr->channel[WRITE].last_dstat) &
1166                 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
1167                 printk(KERN_WARNING "%s: channel problems during close - "
1168                         "read: %02x -  write: %02x\n",
1169                 dev->name,
1170                 privptr->channel[READ].last_dstat,
1171                 privptr->channel[WRITE].last_dstat);
1172                  CLAW_DBF_TEXT(2,trace,"badclose");
1173         }
1174 #ifdef FUNCTRACE
1175         printk(KERN_INFO "%s:%s Exit on line %d\n",
1176                 dev->name,__FUNCTION__,__LINE__);
1177 #endif
1178         CLAW_DBF_TEXT(4,trace,"rlsexit");
1179         return 0;
1180 }      /* end of claw_release     */
1181
1182
1183
1184 /*-------------------------------------------------------------------*
1185 *       claw_write_retry                                             *
1186 *                                                                    *
1187 *--------------------------------------------------------------------*/
1188
1189 static void
1190 claw_write_retry ( struct chbk *p_ch )
1191 {
1192
1193         struct net_device  *dev=p_ch->ndev;
1194
1195
1196 #ifdef FUNCTRACE
1197         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
1198         printk(KERN_INFO "claw: variable p_ch =\n");
1199         dumpit((char *) p_ch, sizeof(struct chbk));
1200 #endif
1201         CLAW_DBF_TEXT(4,trace,"w_retry");
1202         if (p_ch->claw_state == CLAW_STOP) {
1203 #ifdef FUNCTRACE
1204                 printk(KERN_INFO "%s:%s Exit on line %d\n",
1205                         dev->name,__FUNCTION__,__LINE__);
1206 #endif
1207                 return;
1208         }
1209 #ifdef DEBUGMSG
1210         printk( KERN_INFO "%s:%s  state-%02x\n" ,
1211                 dev->name,
1212                 __FUNCTION__,
1213                 p_ch->claw_state);
1214 #endif
1215         claw_strt_out_IO( dev );
1216 #ifdef FUNCTRACE
1217         printk(KERN_INFO "%s:%s Exit on line %d\n",
1218                 dev->name,__FUNCTION__,__LINE__);
1219 #endif
1220         CLAW_DBF_TEXT(4,trace,"rtry_xit");
1221         return;
1222 }      /* end of claw_write_retry      */
1223
1224
1225 /*-------------------------------------------------------------------*
1226 *       claw_write_next                                              *
1227 *                                                                    *
1228 *--------------------------------------------------------------------*/
1229
1230 static void
1231 claw_write_next ( struct chbk * p_ch )
1232 {
1233
1234         struct net_device  *dev;
1235         struct claw_privbk *privptr=NULL;
1236         struct sk_buff *pk_skb;
1237         int     rc;
1238
1239 #ifdef FUNCTRACE
1240         printk(KERN_INFO "%s:%s Enter  \n",p_ch->ndev->name,__FUNCTION__);
1241         printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
1242         dumpit((char *) p_ch, sizeof(struct chbk));
1243 #endif
1244         CLAW_DBF_TEXT(4,trace,"claw_wrt");
1245         if (p_ch->claw_state == CLAW_STOP)
1246                 return;
1247         dev = (struct net_device *) p_ch->ndev;
1248         privptr = (struct claw_privbk *) dev->priv;
1249         claw_free_wrt_buf( dev );
1250         if ((privptr->write_free_count > 0) &&
1251             !skb_queue_empty(&p_ch->collect_queue)) {
1252                 pk_skb = claw_pack_skb(privptr);
1253                 while (pk_skb != NULL) {
1254                         rc = claw_hw_tx( pk_skb, dev,1);
1255                         if (privptr->write_free_count > 0) {
1256                                 pk_skb = claw_pack_skb(privptr);
1257                         } else
1258                                 pk_skb = NULL;
1259                 }
1260         }
1261         if (privptr->p_write_active_first!=NULL) {
1262                 claw_strt_out_IO(dev);
1263         }
1264
1265 #ifdef FUNCTRACE
1266         printk(KERN_INFO "%s:%s Exit on line %d\n",
1267                 dev->name,__FUNCTION__,__LINE__);
1268 #endif
1269         return;
1270 }      /* end of claw_write_next      */
1271
1272 /*-------------------------------------------------------------------*
1273 *                                                                    *
1274 *       claw_timer                                                   *
1275 *--------------------------------------------------------------------*/
1276
1277 static void
1278 claw_timer ( struct chbk * p_ch )
1279 {
1280 #ifdef FUNCTRACE
1281         printk(KERN_INFO "%s:%s Entry\n",p_ch->ndev->name,__FUNCTION__);
1282         printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
1283         dumpit((char *) p_ch, sizeof(struct chbk));
1284 #endif
1285         CLAW_DBF_TEXT(4,trace,"timer");
1286         p_ch->flag |= CLAW_TIMER;
1287         wake_up(&p_ch->wait);
1288 #ifdef FUNCTRACE
1289         printk(KERN_INFO "%s:%s Exit on line %d\n",
1290                 p_ch->ndev->name,__FUNCTION__,__LINE__);
1291 #endif
1292         return;
1293 }      /* end of claw_timer  */
1294
1295
1296 /*
1297 *
1298 *       functions
1299 */
1300
1301
1302 /*-------------------------------------------------------------------*
1303 *                                                                    *
1304 *     pages_to_order_of_mag                                          *
1305 *                                                                    *
1306 *    takes a number of pages from 1 to 512 and returns the           *
1307 *    log(num_pages)/log(2) get_free_pages() needs a base 2 order     *
1308 *    of magnitude get_free_pages() has an upper order of 9           *
1309 *--------------------------------------------------------------------*/
1310
1311 static int
1312 pages_to_order_of_mag(int num_of_pages)
1313 {
1314         int     order_of_mag=1;         /* assume 2 pages */
1315         int     nump=2;
1316 #ifdef FUNCTRACE
1317         printk(KERN_INFO "%s Enter pages = %d \n",__FUNCTION__,num_of_pages);
1318 #endif
1319         CLAW_DBF_TEXT_(5,trace,"pages%d",num_of_pages);
1320         if (num_of_pages == 1)   {return 0; }  /* magnitude of 0 = 1 page */
1321         /* 512 pages = 2Meg on 4k page systems */
1322         if (num_of_pages >= 512) {return 9; }
1323         /* we have two or more pages order is at least 1 */
1324         for (nump=2 ;nump <= 512;nump*=2) {
1325           if (num_of_pages <= nump)
1326                   break;
1327           order_of_mag +=1;
1328         }
1329         if (order_of_mag > 9) { order_of_mag = 9; }  /* I know it's paranoid */
1330 #ifdef FUNCTRACE
1331         printk(KERN_INFO "%s Exit on line %d, order = %d\n",
1332         __FUNCTION__,__LINE__, order_of_mag);
1333 #endif
1334         CLAW_DBF_TEXT_(5,trace,"mag%d",order_of_mag);
1335         return order_of_mag;
1336 }
1337
1338 /*-------------------------------------------------------------------*
1339 *                                                                    *
1340 *     add_claw_reads                                                 *
1341 *                                                                    *
1342 *--------------------------------------------------------------------*/
1343 static int
1344 add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
1345         struct ccwbk* p_last)
1346 {
1347         struct claw_privbk *privptr;
1348         struct ccw1  temp_ccw;
1349         struct endccw * p_end;
1350 #ifdef IOTRACE
1351         struct ccwbk*  p_buf;
1352 #endif
1353 #ifdef FUNCTRACE
1354         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
1355 #endif
1356 #ifdef DEBUGMSG
1357         printk(KERN_INFO "dev\n");
1358         dumpit((char *) dev, sizeof(struct net_device));
1359         printk(KERN_INFO "p_first\n");
1360         dumpit((char *) p_first, sizeof(struct ccwbk));
1361         printk(KERN_INFO "p_last\n");
1362         dumpit((char *) p_last, sizeof(struct ccwbk));
1363 #endif
1364         CLAW_DBF_TEXT(4,trace,"addreads");
1365         privptr = dev->priv;
1366         p_end = privptr->p_end_ccw;
1367
1368         /* first CCW and last CCW contains a new set of read channel programs
1369         *       to apend the running channel programs
1370         */
1371         if ( p_first==NULL) {
1372 #ifdef FUNCTRACE
1373                 printk(KERN_INFO "%s:%s Exit on line %d\n",
1374                         dev->name,__FUNCTION__,__LINE__);
1375 #endif
1376                 CLAW_DBF_TEXT(4,trace,"addexit");
1377                 return 0;
1378         }
1379
1380         /* set up ending CCW sequence for this segment */
1381         if (p_end->read1) {
1382                 p_end->read1=0x00;    /*  second ending CCW is now active */
1383                 /*      reset ending CCWs and setup TIC CCWs              */
1384                 p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1385                 p_end->read2_nop2.flags  = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1386                 p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
1387                 p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
1388                 p_end->read2_nop2.cda=0;
1389                 p_end->read2_nop2.count=1;
1390         }
1391         else {
1392                 p_end->read1=0x01;  /* first ending CCW is now active */
1393                 /*      reset ending CCWs and setup TIC CCWs          */
1394                 p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1395                 p_end->read1_nop2.flags  = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1396                 p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
1397                 p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
1398                 p_end->read1_nop2.cda=0;
1399                 p_end->read1_nop2.count=1;
1400         }
1401
1402         if ( privptr-> p_read_active_first ==NULL ) {
1403 #ifdef DEBUGMSG
1404                 printk(KERN_INFO "%s:%s p_read_active_first == NULL \n",
1405                         dev->name,__FUNCTION__);
1406                 printk(KERN_INFO "%s:%s Read active first/last changed \n",
1407                         dev->name,__FUNCTION__);
1408 #endif
1409                 privptr-> p_read_active_first= p_first;  /*    set new first */
1410                 privptr-> p_read_active_last = p_last;   /*    set new last  */
1411         }
1412         else {
1413
1414 #ifdef DEBUGMSG
1415                 printk(KERN_INFO "%s:%s Read in progress \n",
1416                 dev->name,__FUNCTION__);
1417 #endif
1418                 /* set up TIC ccw  */
1419                 temp_ccw.cda= (__u32)__pa(&p_first->read);
1420                 temp_ccw.count=0;
1421                 temp_ccw.flags=0;
1422                 temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
1423
1424
1425                 if (p_end->read1) {
1426
1427                /* first set of CCW's is chained to the new read              */
1428                /* chain, so the second set is chained to the active chain.   */
1429                /* Therefore modify the second set to point to the new        */
1430                /* read chain set up TIC CCWs                                 */
1431                /* make sure we update the CCW so channel doesn't fetch it    */
1432                /* when it's only half done                                   */
1433                         memcpy( &p_end->read2_nop2, &temp_ccw ,
1434                                 sizeof(struct ccw1));
1435                         privptr->p_read_active_last->r_TIC_1.cda=
1436                                 (__u32)__pa(&p_first->read);
1437                         privptr->p_read_active_last->r_TIC_2.cda=
1438                                 (__u32)__pa(&p_first->read);
1439                 }
1440                 else {
1441                         /* make sure we update the CCW so channel doesn't   */
1442                         /* fetch it when it is only half done               */
1443                         memcpy( &p_end->read1_nop2, &temp_ccw ,
1444                                 sizeof(struct ccw1));
1445                         privptr->p_read_active_last->r_TIC_1.cda=
1446                                 (__u32)__pa(&p_first->read);
1447                         privptr->p_read_active_last->r_TIC_2.cda=
1448                                 (__u32)__pa(&p_first->read);
1449                 }
1450                 /*      chain in new set of blocks                              */
1451                 privptr->p_read_active_last->next = p_first;
1452                 privptr->p_read_active_last=p_last;
1453         } /* end of if ( privptr-> p_read_active_first ==NULL)  */
1454 #ifdef IOTRACE
1455         printk(KERN_INFO "%s:%s  dump p_last CCW BK \n",dev->name,__FUNCTION__);
1456         dumpit((char *)p_last, sizeof(struct ccwbk));
1457         printk(KERN_INFO "%s:%s  dump p_end CCW BK \n",dev->name,__FUNCTION__);
1458         dumpit((char *)p_end, sizeof(struct endccw));
1459
1460         printk(KERN_INFO "%s:%s dump p_first CCW BK \n",dev->name,__FUNCTION__);
1461         dumpit((char *)p_first, sizeof(struct ccwbk));
1462         printk(KERN_INFO "%s:%s Dump Active CCW chain \n",
1463                 dev->name,__FUNCTION__);
1464         p_buf=privptr->p_read_active_first;
1465         while (p_buf!=NULL) {
1466                 dumpit((char *)p_buf, sizeof(struct ccwbk));
1467                 p_buf=p_buf->next;
1468         }
1469 #endif
1470 #ifdef FUNCTRACE
1471         printk(KERN_INFO "%s:%s Exit on line %d\n",
1472                 dev->name,__FUNCTION__,__LINE__);
1473 #endif
1474         CLAW_DBF_TEXT(4,trace,"addexit");
1475         return 0;
1476 }    /*     end of add_claw_reads   */
1477
1478 /*-------------------------------------------------------------------*
1479  *   ccw_check_return_code                                           *
1480  *                                                                   *
1481  *-------------------------------------------------------------------*/
1482
1483 static void
1484 ccw_check_return_code(struct ccw_device *cdev, int return_code)
1485 {
1486 #ifdef FUNCTRACE
1487         printk(KERN_INFO "%s: %s() > enter  \n",
1488                 cdev->dev.bus_id,__FUNCTION__);
1489 #endif
1490         CLAW_DBF_TEXT(4,trace,"ccwret");
1491 #ifdef DEBUGMSG
1492         printk(KERN_INFO "variable cdev =\n");
1493         dumpit((char *) cdev, sizeof(struct ccw_device));
1494         printk(KERN_INFO "variable return_code = %d\n",return_code);
1495 #endif
1496         if (return_code != 0) {
1497                 switch (return_code) {
1498                         case -EBUSY:
1499                                 printk(KERN_INFO "%s: Busy !\n",
1500                                         cdev->dev.bus_id);
1501                                 break;
1502                         case -ENODEV:
1503                                 printk(KERN_EMERG "%s: Missing device called "
1504                                         "for IO ENODEV\n", cdev->dev.bus_id);
1505                                 break;
1506                         case -EIO:
1507                                 printk(KERN_EMERG "%s: Status pending... EIO \n",
1508                                         cdev->dev.bus_id);
1509                                 break;
1510                         case -EINVAL:
1511                                 printk(KERN_EMERG "%s: Invalid Dev State EINVAL \n",
1512                                         cdev->dev.bus_id);
1513                                 break;
1514                         default:
1515                                 printk(KERN_EMERG "%s: Unknown error in "
1516                                  "Do_IO %d\n",cdev->dev.bus_id, return_code);
1517                 }
1518         }
1519 #ifdef FUNCTRACE
1520         printk(KERN_INFO "%s: %s() > exit on line %d\n",
1521                 cdev->dev.bus_id,__FUNCTION__,__LINE__);
1522 #endif
1523         CLAW_DBF_TEXT(4,trace,"ccwret");
1524 }    /*    end of ccw_check_return_code   */
1525
1526 /*-------------------------------------------------------------------*
1527 *       ccw_check_unit_check                                         *
1528 *--------------------------------------------------------------------*/
1529
1530 static void
1531 ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
1532 {
1533         struct net_device *dev = p_ch->ndev;
1534
1535 #ifdef FUNCTRACE
1536         printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
1537 #endif
1538 #ifdef DEBUGMSG
1539         printk(KERN_INFO "%s: variable dev =\n",dev->name);
1540         dumpit((char *)dev, sizeof(struct net_device));
1541         printk(KERN_INFO "%s: variable sense =\n",dev->name);
1542         dumpit((char *)&sense, 2);
1543 #endif
1544         CLAW_DBF_TEXT(4,trace,"unitchek");
1545
1546         printk(KERN_INFO "%s: Unit Check with sense byte:0x%04x\n",
1547                 dev->name, sense);
1548
1549         if (sense & 0x40) {
1550                 if (sense & 0x01) {
1551                         printk(KERN_WARNING "%s: Interface disconnect or "
1552                                 "Selective reset "
1553                                 "occurred (remote side)\n", dev->name);
1554                 }
1555                 else {
1556                         printk(KERN_WARNING "%s: System reset occured"
1557                                 " (remote side)\n", dev->name);
1558                 }
1559         }
1560         else if (sense & 0x20) {
1561                 if (sense & 0x04) {
1562                         printk(KERN_WARNING "%s: Data-streaming "
1563                                 "timeout)\n", dev->name);
1564                 }
1565                 else  {
1566                         printk(KERN_WARNING "%s: Data-transfer parity"
1567                                 " error\n", dev->name);
1568                 }
1569         }
1570         else if (sense & 0x10) {
1571                 if (sense & 0x20) {
1572                         printk(KERN_WARNING "%s: Hardware malfunction "
1573                                 "(remote side)\n", dev->name);
1574                 }
1575                 else {
1576                         printk(KERN_WARNING "%s: read-data parity error "
1577                                 "(remote side)\n", dev->name);
1578                 }
1579         }
1580
1581 #ifdef FUNCTRACE
1582         printk(KERN_INFO "%s: %s() exit on line %d\n",
1583                 dev->name,__FUNCTION__,__LINE__);
1584 #endif
1585 }   /*    end of ccw_check_unit_check    */
1586
1587
1588
1589 /*-------------------------------------------------------------------*
1590 * Dump buffer format                                                 *
1591 *                                                                    *
1592 *--------------------------------------------------------------------*/
1593 #ifdef DEBUG
1594 static void
1595 dumpit(char* buf, int len)
1596 {
1597
1598         __u32      ct, sw, rm, dup;
1599         char       *ptr, *rptr;
1600         char       tbuf[82], tdup[82];
1601 #if (CONFIG_64BIT)
1602         char       addr[22];
1603 #else
1604         char       addr[12];
1605 #endif
1606         char       boff[12];
1607         char       bhex[82], duphex[82];
1608         char       basc[40];
1609
1610         sw  = 0;
1611         rptr =ptr=buf;
1612         rm  = 16;
1613         duphex[0]  = 0x00;
1614         dup = 0;
1615         for ( ct=0; ct < len; ct++, ptr++, rptr++ )  {
1616                 if (sw == 0) {
1617 #if (CONFIG_64BIT)
1618                         sprintf(addr, "%16.16lX",(unsigned long)rptr);
1619 #else
1620                         sprintf(addr, "%8.8X",(__u32)rptr);
1621 #endif
1622                         sprintf(boff, "%4.4X", (__u32)ct);
1623                         bhex[0] = '\0';
1624                         basc[0] = '\0';
1625                 }
1626                 if ((sw == 4) || (sw == 12)) {
1627                         strcat(bhex, " ");
1628                 }
1629                 if (sw == 8) {
1630                         strcat(bhex, "  ");
1631                 }
1632 #if (CONFIG_64BIT)
1633                 sprintf(tbuf,"%2.2lX", (unsigned long)*ptr);
1634 #else
1635                 sprintf(tbuf,"%2.2X", (__u32)*ptr);
1636 #endif
1637                 tbuf[2] = '\0';
1638                 strcat(bhex, tbuf);
1639                 if ((0!=isprint(*ptr)) && (*ptr >= 0x20)) {
1640                         basc[sw] = *ptr;
1641                 }
1642                 else {
1643                         basc[sw] = '.';
1644                 }
1645                 basc[sw+1] = '\0';
1646                 sw++;
1647                 rm--;
1648                 if (sw==16) {
1649                         if ((strcmp(duphex, bhex)) !=0) {
1650                                 if (dup !=0) {
1651                                         sprintf(tdup,"Duplicate as above to"
1652                                                 " %s", addr);
1653                                         printk( KERN_INFO "                 "
1654                                                 "   --- %s ---\n",tdup);
1655                                 }
1656                                 printk( KERN_INFO "   %s (+%s) : %s  [%s]\n",
1657                                          addr, boff, bhex, basc);
1658                                 dup = 0;
1659                                 strcpy(duphex, bhex);
1660                         }
1661                         else {
1662                                 dup++;
1663                         }
1664                         sw = 0;
1665                         rm = 16;
1666                 }
1667         }  /* endfor */
1668
1669         if (sw != 0) {
1670                 for ( ; rm > 0; rm--, sw++ ) {
1671                         if ((sw==4) || (sw==12)) strcat(bhex, " ");
1672                         if (sw==8)               strcat(bhex, "  ");
1673                         strcat(bhex, "  ");
1674                         strcat(basc, " ");
1675                 }
1676                 if (dup !=0) {
1677                         sprintf(tdup,"Duplicate as above to %s", addr);
1678                         printk( KERN_INFO "                    --- %s ---\n",
1679                                 tdup);
1680                 }
1681                 printk( KERN_INFO "   %s (+%s) : %s  [%s]\n",
1682                         addr, boff, bhex, basc);
1683         }
1684         else {
1685                 if (dup >=1) {
1686                         sprintf(tdup,"Duplicate as above to %s", addr);
1687                         printk( KERN_INFO "                    --- %s ---\n",
1688                                 tdup);
1689                 }
1690                 if (dup !=0) {
1691                         printk( KERN_INFO "   %s (+%s) : %s  [%s]\n",
1692                                 addr, boff, bhex, basc);
1693                 }
1694         }
1695         return;
1696
1697 }   /*   end of dumpit  */
1698 #endif
1699
1700 /*-------------------------------------------------------------------*
1701 *               find_link                                            *
1702 *--------------------------------------------------------------------*/
1703 static int
1704 find_link(struct net_device *dev, char *host_name, char *ws_name )
1705 {
1706         struct claw_privbk *privptr;
1707         struct claw_env *p_env;
1708         int    rc=0;
1709
1710 #ifdef FUNCTRACE
1711         printk(KERN_INFO "%s:%s > enter  \n",dev->name,__FUNCTION__);
1712 #endif
1713         CLAW_DBF_TEXT(2,setup,"findlink");
1714 #ifdef DEBUGMSG
1715         printk(KERN_INFO "%s: variable dev = \n",dev->name);
1716         dumpit((char *) dev, sizeof(struct net_device));
1717         printk(KERN_INFO "%s: variable host_name = %s\n",dev->name, host_name);
1718         printk(KERN_INFO "%s: variable ws_name = %s\n",dev->name, ws_name);
1719 #endif
1720         privptr=dev->priv;
1721         p_env=privptr->p_env;
1722         switch (p_env->packing)
1723         {
1724                 case  PACKING_ASK:
1725                         if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
1726                             (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
1727                              rc = EINVAL;
1728                         break;
1729                 case  DO_PACKED:
1730                 case  PACK_SEND:
1731                         if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
1732                             (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
1733                                 rc = EINVAL;
1734                         break;
1735                 default:
1736                         if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
1737                             (memcmp(p_env->api_type , ws_name, 8)!=0))
1738                                 rc = EINVAL;
1739                         break;
1740         }
1741
1742 #ifdef FUNCTRACE
1743         printk(KERN_INFO "%s:%s Exit on line %d\n",
1744                 dev->name,__FUNCTION__,__LINE__);
1745 #endif
1746         return 0;
1747 }    /*    end of find_link    */
1748
1749 /*-------------------------------------------------------------------*
1750  *   claw_hw_tx                                                      *
1751  *                                                                   *
1752  *                                                                   *
1753  *-------------------------------------------------------------------*/
1754
1755 static int
1756 claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
1757 {
1758         int                             rc=0;
1759         struct claw_privbk              *privptr;
1760         struct ccwbk           *p_this_ccw;
1761         struct ccwbk           *p_first_ccw;
1762         struct ccwbk           *p_last_ccw;
1763         __u32                           numBuffers;
1764         signed long                     len_of_data;
1765         unsigned long                   bytesInThisBuffer;
1766         unsigned char                   *pDataAddress;
1767         struct endccw                   *pEnd;
1768         struct ccw1                     tempCCW;
1769         struct chbk                     *p_ch;
1770         struct claw_env                 *p_env;
1771         int                             lock;
1772         struct clawph                   *pk_head;
1773         struct chbk                     *ch;
1774 #ifdef IOTRACE
1775         struct ccwbk                   *p_buf;
1776 #endif
1777 #ifdef FUNCTRACE
1778         printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
1779 #endif
1780         CLAW_DBF_TEXT(4,trace,"hw_tx");
1781 #ifdef DEBUGMSG
1782         printk(KERN_INFO "%s: variable dev skb =\n",dev->name);
1783         dumpit((char *) skb, sizeof(struct sk_buff));
1784         printk(KERN_INFO "%s: variable dev =\n",dev->name);
1785         dumpit((char *) dev, sizeof(struct net_device));
1786         printk(KERN_INFO "%s: variable linkid = %ld\n",dev->name,linkid);
1787 #endif
1788         privptr = (struct claw_privbk *) (dev->priv);
1789         p_ch=(struct chbk *)&privptr->channel[WRITE];
1790         p_env =privptr->p_env;
1791 #ifdef IOTRACE
1792         printk(KERN_INFO "%s: %s() dump sk_buff  \n",dev->name,__FUNCTION__);
1793         dumpit((char *)skb ,sizeof(struct sk_buff));
1794 #endif
1795         claw_free_wrt_buf(dev); /* Clean up free chain if posible */
1796         /*  scan the write queue to free any completed write packets   */
1797         p_first_ccw=NULL;
1798         p_last_ccw=NULL;
1799         if ((p_env->packing >= PACK_SEND) &&
1800             (skb->cb[1] != 'P')) {
1801                 skb_push(skb,sizeof(struct clawph));
1802                 pk_head=(struct clawph *)skb->data;
1803                 pk_head->len=skb->len-sizeof(struct clawph);
1804                 if (pk_head->len%4)  {
1805                         pk_head->len+= 4-(pk_head->len%4);
1806                         skb_pad(skb,4-(pk_head->len%4));
1807                         skb_put(skb,4-(pk_head->len%4));
1808                 }
1809                 if (p_env->packing == DO_PACKED)
1810                         pk_head->link_num = linkid;
1811                 else
1812                         pk_head->link_num = 0;
1813                 pk_head->flag = 0x00;
1814                 skb_pad(skb,4);
1815                 skb->cb[1] = 'P';
1816         }
1817         if (linkid == 0) {
1818                 if (claw_check_busy(dev)) {
1819                         if (privptr->write_free_count!=0) {
1820                                 claw_clear_busy(dev);
1821                         }
1822                         else {
1823                                 claw_strt_out_IO(dev );
1824                                 claw_free_wrt_buf( dev );
1825                                 if (privptr->write_free_count==0) {
1826 #ifdef IOTRACE
1827                                         printk(KERN_INFO "%s: "
1828                                            "(claw_check_busy) no free write "
1829                                            "buffers\n", dev->name);
1830 #endif
1831                                         ch = &privptr->channel[WRITE];
1832                                         atomic_inc(&skb->users);
1833                                         skb_queue_tail(&ch->collect_queue, skb);
1834                                         goto Done;
1835                                 }
1836                                 else {
1837                                         claw_clear_busy(dev);
1838                                 }
1839                         }
1840                 }
1841                 /*  tx lock  */
1842                 if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
1843 #ifdef DEBUGMSG
1844                         printk(KERN_INFO "%s:  busy  (claw_test_and_setbit_"
1845                                 "busy)\n", dev->name);
1846 #endif
1847                         ch = &privptr->channel[WRITE];
1848                         atomic_inc(&skb->users);
1849                         skb_queue_tail(&ch->collect_queue, skb);
1850                         claw_strt_out_IO(dev );
1851                         rc=-EBUSY;
1852                         goto Done2;
1853                 }
1854         }
1855         /*      See how many write buffers are required to hold this data */
1856         numBuffers= ( skb->len + privptr->p_env->write_size - 1) /
1857                         ( privptr->p_env->write_size);
1858
1859         /*      If that number of buffers isn't available, give up for now */
1860         if (privptr->write_free_count < numBuffers ||
1861             privptr->p_write_free_chain == NULL ) {
1862
1863                 claw_setbit_busy(TB_NOBUFFER,dev);
1864
1865 #ifdef DEBUGMSG
1866                 printk(KERN_INFO "%s:  busy  (claw_setbit_busy"
1867                         "(TB_NOBUFFER))\n", dev->name);
1868                 printk(KERN_INFO "       free_count: %d, numBuffers : %d\n",
1869                         (int)privptr->write_free_count,(int) numBuffers );
1870 #endif
1871                 ch = &privptr->channel[WRITE];
1872                 atomic_inc(&skb->users);
1873                 skb_queue_tail(&ch->collect_queue, skb);
1874                 CLAW_DBF_TEXT(2,trace,"clawbusy");
1875                 goto Done2;
1876         }
1877         pDataAddress=skb->data;
1878         len_of_data=skb->len;
1879
1880         while (len_of_data > 0) {
1881 #ifdef DEBUGMSG
1882                 printk(KERN_INFO "%s: %s() length-of-data is %ld \n",
1883                         dev->name ,__FUNCTION__,len_of_data);
1884                 dumpit((char *)pDataAddress ,64);
1885 #endif
1886                 p_this_ccw=privptr->p_write_free_chain;  /* get a block */
1887                 if (p_this_ccw == NULL) { /* lost the race */
1888                         ch = &privptr->channel[WRITE];
1889                         atomic_inc(&skb->users);
1890                         skb_queue_tail(&ch->collect_queue, skb);
1891                         goto Done2;
1892                 }
1893                 privptr->p_write_free_chain=p_this_ccw->next;
1894                 p_this_ccw->next=NULL;
1895                 --privptr->write_free_count; /* -1 */
1896                 bytesInThisBuffer=len_of_data;
1897                 memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
1898                 len_of_data-=bytesInThisBuffer;
1899                 pDataAddress+=(unsigned long)bytesInThisBuffer;
1900                 /*      setup write CCW         */
1901                 p_this_ccw->write.cmd_code = (linkid * 8) +1;
1902                 if (len_of_data>0) {
1903                         p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
1904                 }
1905                 p_this_ccw->write.count=bytesInThisBuffer;
1906                 /*      now add to end of this chain    */
1907                 if (p_first_ccw==NULL)    {
1908                         p_first_ccw=p_this_ccw;
1909                 }
1910                 if (p_last_ccw!=NULL) {
1911                         p_last_ccw->next=p_this_ccw;
1912                         /*      set up TIC ccws         */
1913                         p_last_ccw->w_TIC_1.cda=
1914                                 (__u32)__pa(&p_this_ccw->write);
1915                 }
1916                 p_last_ccw=p_this_ccw;      /* save new last block */
1917 #ifdef IOTRACE
1918                 printk(KERN_INFO "%s: %s() > CCW and Buffer %ld bytes long \n",
1919                         dev->name,__FUNCTION__,bytesInThisBuffer);
1920                 dumpit((char *)p_this_ccw, sizeof(struct ccwbk));
1921                 dumpit((char *)p_this_ccw->p_buffer, 64);
1922 #endif
1923         }
1924
1925         /*      FirstCCW and LastCCW now contain a new set of write channel
1926         *       programs to append to the running channel program
1927         */
1928
1929         if (p_first_ccw!=NULL) {
1930                 /*      setup ending ccw sequence for this segment              */
1931                 pEnd=privptr->p_end_ccw;
1932                 if (pEnd->write1) {
1933                         pEnd->write1=0x00;   /* second end ccw is now active */
1934                         /*      set up Tic CCWs         */
1935                         p_last_ccw->w_TIC_1.cda=
1936                                 (__u32)__pa(&pEnd->write2_nop1);
1937                         pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1938                         pEnd->write2_nop2.flags    =
1939                                 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1940                         pEnd->write2_nop2.cda=0;
1941                         pEnd->write2_nop2.count=1;
1942                 }
1943                 else {  /*  end of if (pEnd->write1)*/
1944                         pEnd->write1=0x01;   /* first end ccw is now active */
1945                         /*      set up Tic CCWs         */
1946                         p_last_ccw->w_TIC_1.cda=
1947                                 (__u32)__pa(&pEnd->write1_nop1);
1948                         pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1949                         pEnd->write1_nop2.flags    =
1950                                 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1951                         pEnd->write1_nop2.cda=0;
1952                         pEnd->write1_nop2.count=1;
1953                 }  /* end if if (pEnd->write1) */
1954
1955
1956                 if (privptr->p_write_active_first==NULL ) {
1957                         privptr->p_write_active_first=p_first_ccw;
1958                         privptr->p_write_active_last=p_last_ccw;
1959                 }
1960                 else {
1961
1962                         /*      set up Tic CCWs         */
1963
1964                         tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
1965                         tempCCW.count=0;
1966                         tempCCW.flags=0;
1967                         tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
1968
1969                         if (pEnd->write1) {
1970
1971                  /*
1972                  * first set of ending CCW's is chained to the new write
1973                  * chain, so the second set is chained to the active chain
1974                  * Therefore modify the second set to point the new write chain.
1975                  * make sure we update the CCW atomically
1976                  * so channel does not fetch it when it's only half done
1977                  */
1978                                 memcpy( &pEnd->write2_nop2, &tempCCW ,
1979                                         sizeof(struct ccw1));
1980                                 privptr->p_write_active_last->w_TIC_1.cda=
1981                                         (__u32)__pa(&p_first_ccw->write);
1982                         }
1983                         else {
1984
1985                         /*make sure we update the CCW atomically
1986                          *so channel does not fetch it when it's only half done
1987                          */
1988                                 memcpy(&pEnd->write1_nop2, &tempCCW ,
1989                                         sizeof(struct ccw1));
1990                                 privptr->p_write_active_last->w_TIC_1.cda=
1991                                         (__u32)__pa(&p_first_ccw->write);
1992
1993                         } /* end if if (pEnd->write1) */
1994
1995                         privptr->p_write_active_last->next=p_first_ccw;
1996                         privptr->p_write_active_last=p_last_ccw;
1997                 }
1998
1999         } /* endif (p_first_ccw!=NULL)  */
2000
2001
2002 #ifdef IOTRACE
2003         printk(KERN_INFO "%s: %s() >  Dump Active CCW chain \n",
2004                 dev->name,__FUNCTION__);
2005         p_buf=privptr->p_write_active_first;
2006         while (p_buf!=NULL) {
2007                 dumpit((char *)p_buf, sizeof(struct ccwbk));
2008                 p_buf=p_buf->next;
2009         }
2010         p_buf=(struct ccwbk*)privptr->p_end_ccw;
2011         dumpit((char *)p_buf, sizeof(struct endccw));
2012 #endif
2013         dev_kfree_skb_any(skb);
2014         if (linkid==0) {
2015                 lock=LOCK_NO;
2016         }
2017         else  {
2018                 lock=LOCK_YES;
2019         }
2020         claw_strt_out_IO(dev );
2021         /*      if write free count is zero , set NOBUFFER       */
2022 #ifdef DEBUGMSG
2023         printk(KERN_INFO "%s: %s() > free_count is %d\n",
2024                 dev->name,__FUNCTION__,
2025                 (int) privptr->write_free_count );
2026 #endif
2027         if (privptr->write_free_count==0) {
2028                 claw_setbit_busy(TB_NOBUFFER,dev);
2029         }
2030 Done2:
2031         claw_clearbit_busy(TB_TX,dev);
2032 Done:
2033 #ifdef FUNCTRACE
2034         printk(KERN_INFO "%s: %s() > exit on line %d, rc = %d \n",
2035                 dev->name,__FUNCTION__,__LINE__, rc);
2036 #endif
2037         return(rc);
2038 }    /*    end of claw_hw_tx    */
2039
2040 /*-------------------------------------------------------------------*
2041 *                                                                    *
2042 *     init_ccw_bk                                                    *
2043 *                                                                    *
2044 *--------------------------------------------------------------------*/
2045
2046 static int
2047 init_ccw_bk(struct net_device *dev)
2048 {
2049
2050         __u32   ccw_blocks_required;
2051         __u32   ccw_blocks_perpage;
2052         __u32   ccw_pages_required;
2053         __u32   claw_reads_perpage=1;
2054         __u32   claw_read_pages;
2055         __u32   claw_writes_perpage=1;
2056         __u32   claw_write_pages;
2057         void    *p_buff=NULL;
2058         struct ccwbk*p_free_chain;
2059         struct ccwbk*p_buf;
2060         struct ccwbk*p_last_CCWB;
2061         struct ccwbk*p_first_CCWB;
2062         struct endccw *p_endccw=NULL;
2063         addr_t  real_address;
2064         struct claw_privbk *privptr=dev->priv;
2065         struct clawh *pClawH=NULL;
2066         addr_t   real_TIC_address;
2067         int i,j;
2068 #ifdef FUNCTRACE
2069         printk(KERN_INFO "%s: %s() enter  \n",dev->name,__FUNCTION__);
2070 #endif
2071         CLAW_DBF_TEXT(4,trace,"init_ccw");
2072 #ifdef DEBUGMSG
2073         printk(KERN_INFO "%s: variable dev =\n",dev->name);
2074         dumpit((char *) dev, sizeof(struct net_device));
2075 #endif
2076
2077         /*  initialize  statistics field */
2078         privptr->active_link_ID=0;
2079         /*  initialize  ccwbk pointers  */
2080         privptr->p_write_free_chain=NULL;   /* pointer to free ccw chain*/
2081         privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
2082         privptr->p_write_active_last=NULL;  /* pointer to the last write ccw*/
2083         privptr->p_read_active_first=NULL;  /* pointer to the first read ccw*/
2084         privptr->p_read_active_last=NULL;   /* pointer to the last read ccw */
2085         privptr->p_end_ccw=NULL;            /* pointer to ending ccw        */
2086         privptr->p_claw_signal_blk=NULL;    /* pointer to signal block      */
2087         privptr->buffs_alloc = 0;
2088         memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
2089         memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
2090         /*  initialize  free write ccwbk counter  */
2091         privptr->write_free_count=0;  /* number of free bufs on write chain */
2092         p_last_CCWB = NULL;
2093         p_first_CCWB= NULL;
2094         /*
2095         *  We need 1 CCW block for each read buffer, 1 for each
2096         *  write buffer, plus 1 for ClawSignalBlock
2097         */
2098         ccw_blocks_required =
2099                 privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
2100 #ifdef DEBUGMSG
2101         printk(KERN_INFO "%s: %s() "
2102                 "ccw_blocks_required=%d\n",
2103                 dev->name,__FUNCTION__,
2104                 ccw_blocks_required);
2105         printk(KERN_INFO "%s: %s() "
2106                 "PAGE_SIZE=0x%x\n",
2107                 dev->name,__FUNCTION__,
2108                 (unsigned int)PAGE_SIZE);
2109         printk(KERN_INFO "%s: %s() > "
2110                 "PAGE_MASK=0x%x\n",
2111                 dev->name,__FUNCTION__,
2112                 (unsigned int)PAGE_MASK);
2113 #endif
2114         /*
2115         * compute number of CCW blocks that will fit in a page
2116         */
2117         ccw_blocks_perpage= PAGE_SIZE /  CCWBK_SIZE;
2118         ccw_pages_required=
2119                 (ccw_blocks_required+ccw_blocks_perpage -1) /
2120                          ccw_blocks_perpage;
2121
2122 #ifdef DEBUGMSG
2123         printk(KERN_INFO "%s: %s() > ccw_blocks_perpage=%d\n",
2124                 dev->name,__FUNCTION__,
2125                 ccw_blocks_perpage);
2126         printk(KERN_INFO "%s: %s() > ccw_pages_required=%d\n",
2127                 dev->name,__FUNCTION__,
2128                 ccw_pages_required);
2129 #endif
2130         /*
2131          *  read and write sizes are set by 2 constants in claw.h
2132          *  4k and 32k.  Unpacked values other than 4k are not going to
2133          * provide good performance. With packing buffers support 32k
2134          * buffers are used.
2135          */
2136         if (privptr->p_env->read_size < PAGE_SIZE) {
2137             claw_reads_perpage= PAGE_SIZE / privptr->p_env->read_size;
2138             claw_read_pages= (privptr->p_env->read_buffers +
2139                 claw_reads_perpage -1) / claw_reads_perpage;
2140          }
2141          else {       /* > or equal  */
2142             privptr->p_buff_pages_perread=
2143                 (privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
2144             claw_read_pages=
2145                 privptr->p_env->read_buffers * privptr->p_buff_pages_perread;
2146          }
2147         if (privptr->p_env->write_size < PAGE_SIZE) {
2148             claw_writes_perpage=
2149                 PAGE_SIZE / privptr->p_env->write_size;
2150             claw_write_pages=
2151                 (privptr->p_env->write_buffers + claw_writes_perpage -1) /
2152                         claw_writes_perpage;
2153
2154         }
2155         else {      /* >  or equal  */
2156             privptr->p_buff_pages_perwrite=
2157                  (privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
2158             claw_write_pages=
2159                 privptr->p_env->write_buffers * privptr->p_buff_pages_perwrite;
2160         }
2161 #ifdef DEBUGMSG
2162         if (privptr->p_env->read_size < PAGE_SIZE) {
2163             printk(KERN_INFO "%s: %s() reads_perpage=%d\n",
2164                 dev->name,__FUNCTION__,
2165                 claw_reads_perpage);
2166         }
2167         else {
2168             printk(KERN_INFO "%s: %s() pages_perread=%d\n",
2169                 dev->name,__FUNCTION__,
2170                 privptr->p_buff_pages_perread);
2171         }
2172         printk(KERN_INFO "%s: %s() read_pages=%d\n",
2173                 dev->name,__FUNCTION__,
2174                 claw_read_pages);
2175         if (privptr->p_env->write_size < PAGE_SIZE) {
2176             printk(KERN_INFO "%s: %s() writes_perpage=%d\n",
2177                 dev->name,__FUNCTION__,
2178                 claw_writes_perpage);
2179         }
2180         else {
2181             printk(KERN_INFO "%s: %s() pages_perwrite=%d\n",
2182                 dev->name,__FUNCTION__,
2183                 privptr->p_buff_pages_perwrite);
2184         }
2185         printk(KERN_INFO "%s: %s() write_pages=%d\n",
2186                 dev->name,__FUNCTION__,
2187                 claw_write_pages);
2188 #endif
2189
2190
2191         /*
2192         *               allocate ccw_pages_required
2193         */
2194         if (privptr->p_buff_ccw==NULL) {
2195                 privptr->p_buff_ccw=
2196                         (void *)__get_free_pages(__GFP_DMA,
2197                         (int)pages_to_order_of_mag(ccw_pages_required ));
2198                 if (privptr->p_buff_ccw==NULL) {
2199                         printk(KERN_INFO "%s: %s()  "
2200                                 "__get_free_pages for CCWs failed : "
2201                                 "pages is %d\n",
2202                                 dev->name,__FUNCTION__,
2203                                 ccw_pages_required );
2204 #ifdef FUNCTRACE
2205                         printk(KERN_INFO "%s: %s() > "
2206                                 "exit on line %d, rc = ENOMEM\n",
2207                                 dev->name,__FUNCTION__,
2208                                  __LINE__);
2209 #endif
2210                         return -ENOMEM;
2211                 }
2212                 privptr->p_buff_ccw_num=ccw_pages_required;
2213         }
2214         memset(privptr->p_buff_ccw, 0x00,
2215                 privptr->p_buff_ccw_num * PAGE_SIZE);
2216
2217         /*
2218         *               obtain ending ccw block address
2219         *
2220         */
2221         privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
2222         real_address  = (__u32)__pa(privptr->p_end_ccw);
2223         /*                              Initialize ending CCW block       */
2224 #ifdef DEBUGMSG
2225         printk(KERN_INFO "%s: %s() begin initialize ending CCW blocks\n",
2226                 dev->name,__FUNCTION__);
2227 #endif
2228
2229         p_endccw=privptr->p_end_ccw;
2230         p_endccw->real=real_address;
2231         p_endccw->write1=0x00;
2232         p_endccw->read1=0x00;
2233
2234         /*      write1_nop1                                     */
2235         p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2236         p_endccw->write1_nop1.flags       = CCW_FLAG_SLI | CCW_FLAG_CC;
2237         p_endccw->write1_nop1.count       = 1;
2238         p_endccw->write1_nop1.cda         = 0;
2239
2240         /*      write1_nop2                                     */
2241         p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2242         p_endccw->write1_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2243         p_endccw->write1_nop2.count      = 1;
2244         p_endccw->write1_nop2.cda        = 0;
2245
2246         /*      write2_nop1                                     */
2247         p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2248         p_endccw->write2_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
2249         p_endccw->write2_nop1.count        = 1;
2250         p_endccw->write2_nop1.cda          = 0;
2251
2252         /*      write2_nop2                                     */
2253         p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2254         p_endccw->write2_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2255         p_endccw->write2_nop2.count        = 1;
2256         p_endccw->write2_nop2.cda          = 0;
2257
2258         /*      read1_nop1                                      */
2259         p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2260         p_endccw->read1_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
2261         p_endccw->read1_nop1.count        = 1;
2262         p_endccw->read1_nop1.cda          = 0;
2263
2264         /*      read1_nop2                                      */
2265         p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2266         p_endccw->read1_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2267         p_endccw->read1_nop2.count        = 1;
2268         p_endccw->read1_nop2.cda          = 0;
2269
2270         /*      read2_nop1                                      */
2271         p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2272         p_endccw->read2_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
2273         p_endccw->read2_nop1.count        = 1;
2274         p_endccw->read2_nop1.cda          = 0;
2275
2276         /*      read2_nop2                                      */
2277         p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2278         p_endccw->read2_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2279         p_endccw->read2_nop2.count        = 1;
2280         p_endccw->read2_nop2.cda          = 0;
2281
2282 #ifdef IOTRACE
2283         printk(KERN_INFO "%s: %s() dump claw ending CCW BK \n",
2284                 dev->name,__FUNCTION__);
2285         dumpit((char *)p_endccw, sizeof(struct endccw));
2286 #endif
2287
2288         /*
2289         *                               Build a chain of CCWs
2290         *
2291         */
2292
2293 #ifdef DEBUGMSG
2294         printk(KERN_INFO "%s: %s()  Begin build a chain of CCW buffer \n",
2295                 dev->name,__FUNCTION__);
2296 #endif
2297         p_buff=privptr->p_buff_ccw;
2298
2299         p_free_chain=NULL;
2300         for (i=0 ; i < ccw_pages_required; i++ ) {
2301                 real_address  = (__u32)__pa(p_buff);
2302                 p_buf=p_buff;
2303                 for (j=0 ; j < ccw_blocks_perpage ; j++) {
2304                         p_buf->next  = p_free_chain;
2305                         p_free_chain = p_buf;
2306                         p_buf->real=(__u32)__pa(p_buf);
2307                         ++p_buf;
2308                 }
2309                 p_buff+=PAGE_SIZE;
2310         }
2311 #ifdef DEBUGMSG
2312         printk(KERN_INFO "%s: %s() "
2313                 "End build a chain of CCW buffer \n",
2314                         dev->name,__FUNCTION__);
2315         p_buf=p_free_chain;
2316         while (p_buf!=NULL) {
2317                 dumpit((char *)p_buf, sizeof(struct ccwbk));
2318                 p_buf=p_buf->next;
2319         }
2320 #endif
2321
2322         /*
2323         *                               Initialize ClawSignalBlock
2324         *
2325         */
2326 #ifdef DEBUGMSG
2327         printk(KERN_INFO "%s: %s() "
2328                 "Begin initialize ClawSignalBlock \n",
2329                 dev->name,__FUNCTION__);
2330 #endif
2331         if (privptr->p_claw_signal_blk==NULL) {
2332                 privptr->p_claw_signal_blk=p_free_chain;
2333                 p_free_chain=p_free_chain->next;
2334                 pClawH=(struct clawh *)privptr->p_claw_signal_blk;
2335                 pClawH->length=0xffff;
2336                 pClawH->opcode=0xff;
2337                 pClawH->flag=CLAW_BUSY;
2338         }
2339 #ifdef DEBUGMSG
2340         printk(KERN_INFO "%s: %s() >  End initialize "
2341                 "ClawSignalBlock\n",
2342                 dev->name,__FUNCTION__);
2343         dumpit((char *)privptr->p_claw_signal_blk, sizeof(struct ccwbk));
2344 #endif
2345
2346         /*
2347         *               allocate write_pages_required and add to free chain
2348         */
2349         if (privptr->p_buff_write==NULL) {
2350             if (privptr->p_env->write_size < PAGE_SIZE) {
2351                 privptr->p_buff_write=
2352                         (void *)__get_free_pages(__GFP_DMA,
2353                         (int)pages_to_order_of_mag(claw_write_pages ));
2354                 if (privptr->p_buff_write==NULL) {
2355                         printk(KERN_INFO "%s: %s() __get_free_pages for write"
2356                                 " bufs failed : get is for %d pages\n",
2357                                 dev->name,__FUNCTION__,claw_write_pages );
2358                         free_pages((unsigned long)privptr->p_buff_ccw,
2359                            (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
2360                         privptr->p_buff_ccw=NULL;
2361 #ifdef FUNCTRACE
2362                         printk(KERN_INFO "%s: %s() > exit on line %d,"
2363                                 "rc = ENOMEM\n",
2364                                 dev->name,__FUNCTION__,__LINE__);
2365 #endif
2366                         return -ENOMEM;
2367                 }
2368                 /*
2369                 *                               Build CLAW write free chain
2370                 *
2371                 */
2372
2373                 memset(privptr->p_buff_write, 0x00,
2374                         ccw_pages_required * PAGE_SIZE);
2375 #ifdef DEBUGMSG
2376                 printk(KERN_INFO "%s: %s() Begin build claw write free "
2377                         "chain \n",dev->name,__FUNCTION__);
2378 #endif
2379                 privptr->p_write_free_chain=NULL;
2380
2381                 p_buff=privptr->p_buff_write;
2382
2383                 for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
2384                         p_buf        = p_free_chain;      /*  get a CCW */
2385                         p_free_chain = p_buf->next;
2386                         p_buf->next  =privptr->p_write_free_chain;
2387                         privptr->p_write_free_chain = p_buf;
2388                         p_buf-> p_buffer        = (struct clawbuf *)p_buff;
2389                         p_buf-> write.cda       = (__u32)__pa(p_buff);
2390                         p_buf-> write.flags     = CCW_FLAG_SLI | CCW_FLAG_CC;
2391                         p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2392                         p_buf-> w_read_FF.flags   = CCW_FLAG_SLI | CCW_FLAG_CC;
2393                         p_buf-> w_read_FF.count   = 1;
2394                         p_buf-> w_read_FF.cda     =
2395                                 (__u32)__pa(&p_buf-> header.flag);
2396                         p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2397                         p_buf-> w_TIC_1.flags      = 0;
2398                         p_buf-> w_TIC_1.count      = 0;
2399
2400                         if (((unsigned long)p_buff+privptr->p_env->write_size) >=
2401                            ((unsigned long)(p_buff+2*
2402                                 (privptr->p_env->write_size) -1) & PAGE_MASK)) {
2403                         p_buff= p_buff+privptr->p_env->write_size;
2404                         }
2405                 }
2406            }
2407            else      /*  Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
2408            {
2409                privptr->p_write_free_chain=NULL;
2410                for (i = 0; i< privptr->p_env->write_buffers ; i++) {
2411                    p_buff=(void *)__get_free_pages(__GFP_DMA,
2412                         (int)pages_to_order_of_mag(
2413                         privptr->p_buff_pages_perwrite) );
2414 #ifdef IOTRACE
2415                    printk(KERN_INFO "%s:%s __get_free_pages "
2416                     "for writes buf: get for %d pages\n",
2417                     dev->name,__FUNCTION__,
2418                     privptr->p_buff_pages_perwrite);
2419 #endif
2420                    if (p_buff==NULL) {
2421                         printk(KERN_INFO "%s:%s __get_free_pages"
2422                                 "for writes buf failed : get is for %d pages\n",
2423                                 dev->name,
2424                                 __FUNCTION__,
2425                                 privptr->p_buff_pages_perwrite );
2426                         free_pages((unsigned long)privptr->p_buff_ccw,
2427                               (int)pages_to_order_of_mag(
2428                                         privptr->p_buff_ccw_num));
2429                         privptr->p_buff_ccw=NULL;
2430                         p_buf=privptr->p_buff_write;
2431                         while (p_buf!=NULL) {
2432                                 free_pages((unsigned long)
2433                                         p_buf->p_buffer,
2434                                         (int)pages_to_order_of_mag(
2435                                         privptr->p_buff_pages_perwrite));
2436                                 p_buf=p_buf->next;
2437                         }
2438 #ifdef FUNCTRACE
2439                         printk(KERN_INFO "%s: %s exit on line %d, rc = ENOMEM\n",
2440                         dev->name,
2441                         __FUNCTION__,
2442                         __LINE__);
2443 #endif
2444                         return -ENOMEM;
2445                    }  /* Error on get_pages   */
2446                    memset(p_buff, 0x00, privptr->p_env->write_size );
2447                    p_buf         = p_free_chain;
2448                    p_free_chain  = p_buf->next;
2449                    p_buf->next   = privptr->p_write_free_chain;
2450                    privptr->p_write_free_chain = p_buf;
2451                    privptr->p_buff_write = p_buf;
2452                    p_buf->p_buffer=(struct clawbuf *)p_buff;
2453                    p_buf-> write.cda     = (__u32)__pa(p_buff);
2454                    p_buf-> write.flags   = CCW_FLAG_SLI | CCW_FLAG_CC;
2455                    p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2456                    p_buf-> w_read_FF.flags    = CCW_FLAG_SLI | CCW_FLAG_CC;
2457                    p_buf-> w_read_FF.count    = 1;
2458                    p_buf-> w_read_FF.cda      =
2459                         (__u32)__pa(&p_buf-> header.flag);
2460                    p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2461                    p_buf-> w_TIC_1.flags   = 0;
2462                    p_buf-> w_TIC_1.count   = 0;
2463                }  /* for all write_buffers   */
2464
2465            }    /* else buffers are PAGE_SIZE or bigger */
2466
2467         }
2468         privptr->p_buff_write_num=claw_write_pages;
2469         privptr->write_free_count=privptr->p_env->write_buffers;
2470
2471
2472 #ifdef DEBUGMSG
2473         printk(KERN_INFO "%s:%s  End build claw write free chain \n",
2474         dev->name,__FUNCTION__);
2475         p_buf=privptr->p_write_free_chain;
2476         while (p_buf!=NULL) {
2477                 dumpit((char *)p_buf, sizeof(struct ccwbk));
2478                 p_buf=p_buf->next;
2479         }
2480 #endif
2481         /*
2482         *               allocate read_pages_required and chain to free chain
2483         */
2484         if (privptr->p_buff_read==NULL) {
2485             if (privptr->p_env->read_size < PAGE_SIZE)  {
2486                 privptr->p_buff_read=
2487                         (void *)__get_free_pages(__GFP_DMA,
2488                         (int)pages_to_order_of_mag(claw_read_pages) );
2489                 if (privptr->p_buff_read==NULL) {
2490                         printk(KERN_INFO "%s: %s() "
2491                                 "__get_free_pages for read buf failed : "
2492                                 "get is for %d pages\n",
2493                                 dev->name,__FUNCTION__,claw_read_pages );
2494                         free_pages((unsigned long)privptr->p_buff_ccw,
2495                                 (int)pages_to_order_of_mag(
2496                                         privptr->p_buff_ccw_num));
2497                         /* free the write pages size is < page size  */
2498                         free_pages((unsigned long)privptr->p_buff_write,
2499                                 (int)pages_to_order_of_mag(
2500                                 privptr->p_buff_write_num));
2501                         privptr->p_buff_ccw=NULL;
2502                         privptr->p_buff_write=NULL;
2503 #ifdef FUNCTRACE
2504                         printk(KERN_INFO "%s: %s() > exit on line %d, rc ="
2505                                 " ENOMEM\n",dev->name,__FUNCTION__,__LINE__);
2506 #endif
2507                         return -ENOMEM;
2508                 }
2509                 memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
2510                 privptr->p_buff_read_num=claw_read_pages;
2511                 /*
2512                 *                               Build CLAW read free chain
2513                 *
2514                 */
2515 #ifdef DEBUGMSG
2516                 printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
2517                         dev->name,__FUNCTION__);
2518 #endif
2519                 p_buff=privptr->p_buff_read;
2520                 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
2521                         p_buf        = p_free_chain;
2522                         p_free_chain = p_buf->next;
2523
2524                         if (p_last_CCWB==NULL) {
2525                                 p_buf->next=NULL;
2526                                 real_TIC_address=0;
2527                                 p_last_CCWB=p_buf;
2528                         }
2529                         else {
2530                                 p_buf->next=p_first_CCWB;
2531                                 real_TIC_address=
2532                                 (__u32)__pa(&p_first_CCWB -> read );
2533                         }
2534
2535                         p_first_CCWB=p_buf;
2536
2537                         p_buf->p_buffer=(struct clawbuf *)p_buff;
2538                         /*  initialize read command */
2539                         p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
2540                         p_buf-> read.cda = (__u32)__pa(p_buff);
2541                         p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2542                         p_buf-> read.count       = privptr->p_env->read_size;
2543
2544                         /*  initialize read_h command */
2545                         p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
2546                         p_buf-> read_h.cda =
2547                                 (__u32)__pa(&(p_buf->header));
2548                         p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2549                         p_buf-> read_h.count      = sizeof(struct clawh);
2550
2551                         /*  initialize Signal command */
2552                         p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
2553                         p_buf-> signal.cda =
2554                                 (__u32)__pa(&(pClawH->flag));
2555                         p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2556                         p_buf-> signal.count     = 1;
2557
2558                         /*  initialize r_TIC_1 command */
2559                         p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2560                         p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
2561                         p_buf-> r_TIC_1.flags = 0;
2562                         p_buf-> r_TIC_1.count      = 0;
2563
2564                         /*  initialize r_read_FF command */
2565                         p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2566                         p_buf-> r_read_FF.cda =
2567                                 (__u32)__pa(&(pClawH->flag));
2568                         p_buf-> r_read_FF.flags =
2569                                 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
2570                         p_buf-> r_read_FF.count    = 1;
2571
2572                         /*    initialize r_TIC_2          */
2573                         memcpy(&p_buf->r_TIC_2,
2574                                 &p_buf->r_TIC_1, sizeof(struct ccw1));
2575
2576                         /*     initialize Header     */
2577                         p_buf->header.length=0xffff;
2578                         p_buf->header.opcode=0xff;
2579                         p_buf->header.flag=CLAW_PENDING;
2580
2581                         if (((unsigned long)p_buff+privptr->p_env->read_size) >=
2582                                 ((unsigned long)(p_buff+2*(privptr->p_env->read_size) -1)
2583                                  & PAGE_MASK) ) {
2584                                 p_buff= p_buff+privptr->p_env->read_size;
2585                         }
2586                         else {
2587                                 p_buff=
2588                                 (void *)((unsigned long)
2589                                         (p_buff+2*(privptr->p_env->read_size) -1)
2590                                          & PAGE_MASK) ;
2591                         }
2592                 }   /* for read_buffers   */
2593           }         /* read_size < PAGE_SIZE  */
2594           else {  /* read Size >= PAGE_SIZE  */
2595
2596 #ifdef DEBUGMSG
2597         printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
2598                 dev->name,__FUNCTION__);
2599 #endif
2600                 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
2601                         p_buff = (void *)__get_free_pages(__GFP_DMA,
2602                                 (int)pages_to_order_of_mag(privptr->p_buff_pages_perread) );
2603                         if (p_buff==NULL) {
2604                                 printk(KERN_INFO "%s: %s() __get_free_pages for read "
2605                                         "buf failed : get is for %d pages\n",
2606                                         dev->name,__FUNCTION__,
2607                                         privptr->p_buff_pages_perread );
2608                                 free_pages((unsigned long)privptr->p_buff_ccw,
2609                                         (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
2610                                 /* free the write pages  */
2611                                 p_buf=privptr->p_buff_write;
2612                                 while (p_buf!=NULL) {
2613                                         free_pages((unsigned long)p_buf->p_buffer,
2614                                                 (int)pages_to_order_of_mag(
2615                                                 privptr->p_buff_pages_perwrite ));
2616                                         p_buf=p_buf->next;
2617                                 }
2618                                 /* free any read pages already alloc  */
2619                                 p_buf=privptr->p_buff_read;
2620                                 while (p_buf!=NULL) {
2621                                         free_pages((unsigned long)p_buf->p_buffer,
2622                                                 (int)pages_to_order_of_mag(
2623                                                 privptr->p_buff_pages_perread ));
2624                                         p_buf=p_buf->next;
2625                                 }
2626                                 privptr->p_buff_ccw=NULL;
2627                                 privptr->p_buff_write=NULL;
2628 #ifdef FUNCTRACE
2629                                 printk(KERN_INFO "%s: %s() exit on line %d, rc = ENOMEM\n",
2630                                         dev->name,__FUNCTION__,
2631                                         __LINE__);
2632 #endif
2633                                 return -ENOMEM;
2634                         }
2635                         memset(p_buff, 0x00, privptr->p_env->read_size);
2636                         p_buf        = p_free_chain;
2637                         privptr->p_buff_read = p_buf;
2638                         p_free_chain = p_buf->next;
2639
2640                         if (p_last_CCWB==NULL) {
2641                                 p_buf->next=NULL;
2642                                 real_TIC_address=0;
2643                                 p_last_CCWB=p_buf;
2644                         }
2645                         else {
2646                                 p_buf->next=p_first_CCWB;
2647                                 real_TIC_address=
2648                                         (addr_t)__pa(
2649                                                 &p_first_CCWB -> read );
2650                         }
2651
2652                         p_first_CCWB=p_buf;
2653                                 /* save buff address */
2654                         p_buf->p_buffer=(struct clawbuf *)p_buff;
2655                         /*  initialize read command */
2656                         p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
2657                         p_buf-> read.cda = (__u32)__pa(p_buff);
2658                         p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2659                         p_buf-> read.count       = privptr->p_env->read_size;
2660
2661                         /*  initialize read_h command */
2662                         p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
2663                         p_buf-> read_h.cda =
2664                                 (__u32)__pa(&(p_buf->header));
2665                         p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2666                         p_buf-> read_h.count      = sizeof(struct clawh);
2667
2668                         /*  initialize Signal command */
2669                         p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
2670                         p_buf-> signal.cda =
2671                                 (__u32)__pa(&(pClawH->flag));
2672                         p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2673                         p_buf-> signal.count     = 1;
2674
2675                         /*  initialize r_TIC_1 command */
2676                         p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2677                         p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
2678                         p_buf-> r_TIC_1.flags = 0;
2679                         p_buf-> r_TIC_1.count      = 0;
2680
2681                         /*  initialize r_read_FF command */
2682                         p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2683                         p_buf-> r_read_FF.cda =
2684                                 (__u32)__pa(&(pClawH->flag));
2685                         p_buf-> r_read_FF.flags =
2686                                 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
2687                         p_buf-> r_read_FF.count    = 1;
2688
2689                         /*    initialize r_TIC_2          */
2690                         memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
2691                                 sizeof(struct ccw1));
2692
2693                         /*     initialize Header     */
2694                         p_buf->header.length=0xffff;
2695                         p_buf->header.opcode=0xff;
2696                         p_buf->header.flag=CLAW_PENDING;
2697
2698                 }    /* For read_buffers   */
2699           }     /*  read_size >= PAGE_SIZE   */
2700         }       /*  pBuffread = NULL */
2701 #ifdef DEBUGMSG
2702         printk(KERN_INFO "%s: %s() >  End build claw read free chain \n",
2703                 dev->name,__FUNCTION__);
2704         p_buf=p_first_CCWB;
2705         while (p_buf!=NULL) {
2706                 dumpit((char *)p_buf, sizeof(struct ccwbk));
2707                 p_buf=p_buf->next;
2708         }
2709
2710 #endif
2711         add_claw_reads( dev  ,p_first_CCWB , p_last_CCWB);
2712         privptr->buffs_alloc = 1;
2713 #ifdef FUNCTRACE
2714         printk(KERN_INFO "%s: %s() exit on line %d\n",
2715                 dev->name,__FUNCTION__,__LINE__);
2716 #endif
2717         return 0;
2718 }    /*    end of init_ccw_bk */
2719
2720 /*-------------------------------------------------------------------*
2721 *                                                                    *
2722 *       probe_error                                                  *
2723 *                                                                    *
2724 *--------------------------------------------------------------------*/
2725
2726 static void
2727 probe_error( struct ccwgroup_device *cgdev)
2728 {
2729   struct claw_privbk *privptr;
2730 #ifdef FUNCTRACE
2731         printk(KERN_INFO "%s enter  \n",__FUNCTION__);
2732 #endif
2733         CLAW_DBF_TEXT(4,trace,"proberr");
2734 #ifdef DEBUGMSG
2735         printk(KERN_INFO "%s variable cgdev =\n",__FUNCTION__);
2736         dumpit((char *) cgdev, sizeof(struct ccwgroup_device));
2737 #endif
2738         privptr=(struct claw_privbk *)cgdev->dev.driver_data;
2739         if (privptr!=NULL) {
2740                 kfree(privptr->p_env);
2741                 privptr->p_env=NULL;
2742                 kfree(privptr->p_mtc_envelope);
2743                 privptr->p_mtc_envelope=NULL;
2744                 kfree(privptr);
2745                 privptr=NULL;
2746         }
2747 #ifdef FUNCTRACE
2748         printk(KERN_INFO "%s > exit on line %d\n",
2749                  __FUNCTION__,__LINE__);
2750 #endif
2751
2752         return;
2753 }    /*    probe_error    */
2754
2755
2756
2757 /*-------------------------------------------------------------------*
2758 *    claw_process_control                                            *
2759 *                                                                    *
2760 *                                                                    *
2761 *--------------------------------------------------------------------*/
2762
2763 static int
2764 claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
2765 {
2766
2767         struct clawbuf *p_buf;
2768         struct clawctl  ctlbk;
2769         struct clawctl *p_ctlbk;
2770         char    temp_host_name[8];
2771         char    temp_ws_name[8];
2772         struct claw_privbk *privptr;
2773         struct claw_env *p_env;
2774         struct sysval *p_sysval;
2775         struct conncmd *p_connect=NULL;
2776         int rc;
2777         struct chbk *p_ch = NULL;
2778 #ifdef FUNCTRACE
2779         printk(KERN_INFO "%s: %s() > enter  \n",
2780                 dev->name,__FUNCTION__);
2781 #endif
2782         CLAW_DBF_TEXT(2,setup,"clw_cntl");
2783 #ifdef DEBUGMSG
2784         printk(KERN_INFO "%s: variable dev =\n",dev->name);
2785         dumpit((char *) dev, sizeof(struct net_device));
2786         printk(KERN_INFO "%s: variable p_ccw =\n",dev->name);
2787         dumpit((char *) p_ccw, sizeof(struct ccwbk *));
2788 #endif
2789         udelay(1000);  /* Wait a ms for the control packets to
2790                         *catch up to each other */
2791         privptr=dev->priv;
2792         p_env=privptr->p_env;
2793         memcpy( &temp_host_name, p_env->host_name, 8);
2794         memcpy( &temp_ws_name, p_env->adapter_name , 8);
2795         printk(KERN_INFO "%s: CLAW device %.8s: "
2796                 "Received Control Packet\n",
2797                 dev->name, temp_ws_name);
2798         if (privptr->release_pend==1) {
2799 #ifdef FUNCTRACE
2800                 printk(KERN_INFO "%s: %s() > "
2801                         "exit on line %d, rc=0\n",
2802                         dev->name,__FUNCTION__,__LINE__);
2803 #endif
2804                 return 0;
2805         }
2806         p_buf=p_ccw->p_buffer;
2807         p_ctlbk=&ctlbk;
2808         if (p_env->packing == DO_PACKED) { /* packing in progress?*/
2809                 memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
2810         } else {
2811                 memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
2812         }
2813 #ifdef IOTRACE
2814         printk(KERN_INFO "%s: dump claw control data inbound\n",dev->name);
2815         dumpit((char *)p_ctlbk, sizeof(struct clawctl));
2816 #endif
2817         switch (p_ctlbk->command)
2818         {
2819                 case SYSTEM_VALIDATE_REQUEST:
2820                         if (p_ctlbk->version!=CLAW_VERSION_ID) {
2821                                 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2822                                         CLAW_RC_WRONG_VERSION );
2823                                 printk("%s: %d is wrong version id. "
2824                                         "Expected %d\n",
2825                                         dev->name, p_ctlbk->version,
2826                                         CLAW_VERSION_ID);
2827                         }
2828                         p_sysval=(struct sysval *)&(p_ctlbk->data);
2829                         printk( "%s: Recv Sys Validate Request: "
2830                                 "Vers=%d,link_id=%d,Corr=%d,WS name=%."
2831                                 "8s,Host name=%.8s\n",
2832                                 dev->name, p_ctlbk->version,
2833                                 p_ctlbk->linkid,
2834                                 p_ctlbk->correlator,
2835                                 p_sysval->WS_name,
2836                                 p_sysval->host_name);
2837                         if (0!=memcmp(temp_host_name,p_sysval->host_name,8)) {
2838                                 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2839                                         CLAW_RC_NAME_MISMATCH );
2840                                 CLAW_DBF_TEXT(2,setup,"HSTBAD");
2841                                 CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->host_name);
2842                                 CLAW_DBF_TEXT_(2,setup,"%s",temp_host_name);
2843                                 printk(KERN_INFO "%s:  Host name mismatch\n",
2844                                         dev->name);
2845                                 printk(KERN_INFO "%s: Received :%s: "
2846                                         "expected :%s: \n",
2847                                         dev->name,
2848                                         p_sysval->host_name,
2849                                         temp_host_name);
2850                         }
2851                         if (0!=memcmp(temp_ws_name,p_sysval->WS_name,8)) {
2852                                 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2853                                         CLAW_RC_NAME_MISMATCH );
2854                                 CLAW_DBF_TEXT(2,setup,"WSNBAD");
2855                                 CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->WS_name);
2856                                 CLAW_DBF_TEXT_(2,setup,"%s",temp_ws_name);
2857                                 printk(KERN_INFO "%s: WS name mismatch\n",
2858                                         dev->name);
2859                                  printk(KERN_INFO "%s: Received :%s: "
2860                                         "expected :%s: \n",
2861                                         dev->name,
2862                                         p_sysval->WS_name,
2863                                         temp_ws_name);
2864                         }
2865                         if (( p_sysval->write_frame_size < p_env->write_size) &&
2866                            ( p_env->packing == 0)) {
2867                                 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2868                                         CLAW_RC_HOST_RCV_TOO_SMALL );
2869                                 printk(KERN_INFO "%s: host write size is too "
2870                                         "small\n", dev->name);
2871                                 CLAW_DBF_TEXT(2,setup,"wrtszbad");
2872                         }
2873                         if (( p_sysval->read_frame_size < p_env->read_size) &&
2874                            ( p_env->packing == 0)) {
2875                                 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2876                                         CLAW_RC_HOST_RCV_TOO_SMALL );
2877                                 printk(KERN_INFO "%s: host read size is too "
2878                                         "small\n", dev->name);
2879                                 CLAW_DBF_TEXT(2,setup,"rdsizbad");
2880                         }
2881                         claw_snd_sys_validate_rsp(dev, p_ctlbk, 0 );
2882                         printk("%s: CLAW device %.8s: System validate"
2883                                 " completed.\n",dev->name, temp_ws_name);
2884                         printk("%s: sys Validate Rsize:%d Wsize:%d\n",dev->name,
2885                                 p_sysval->read_frame_size,p_sysval->write_frame_size);
2886                         privptr->system_validate_comp=1;
2887                         if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
2888                                 p_env->packing = PACKING_ASK;
2889                         }
2890                         claw_strt_conn_req(dev);
2891                         break;
2892
2893                 case SYSTEM_VALIDATE_RESPONSE:
2894                         p_sysval=(struct sysval *)&(p_ctlbk->data);
2895                         printk("%s: Recv Sys Validate Resp: Vers=%d,Corr=%d,RC=%d,"
2896                                 "WS name=%.8s,Host name=%.8s\n",
2897                                 dev->name,
2898                                 p_ctlbk->version,
2899                                 p_ctlbk->correlator,
2900                                 p_ctlbk->rc,
2901                                 p_sysval->WS_name,
2902                                 p_sysval->host_name);
2903                         switch (p_ctlbk->rc)
2904                         {
2905                                 case 0:
2906                                         printk(KERN_INFO "%s: CLAW device "
2907                                                 "%.8s: System validate "
2908                                                 "completed.\n",
2909                                                 dev->name, temp_ws_name);
2910                                         if (privptr->system_validate_comp == 0)
2911                                                 claw_strt_conn_req(dev);
2912                                         privptr->system_validate_comp=1;
2913                                         break;
2914                                 case CLAW_RC_NAME_MISMATCH:
2915                                         printk(KERN_INFO "%s: Sys Validate "
2916                                                 "Resp : Host, WS name is "
2917                                                 "mismatch\n",
2918                                                 dev->name);
2919                                         break;
2920                                 case CLAW_RC_WRONG_VERSION:
2921                                         printk(KERN_INFO "%s: Sys Validate "
2922                                                 "Resp : Wrong version\n",
2923                                                 dev->name);
2924                                         break;
2925                                 case CLAW_RC_HOST_RCV_TOO_SMALL:
2926                                         printk(KERN_INFO "%s: Sys Validate "
2927                                                 "Resp : bad frame size\n",
2928                                                 dev->name);
2929                                         break;
2930                                 default:
2931                                         printk(KERN_INFO "%s: Sys Validate "
2932                                                 "error code=%d \n",
2933                                                  dev->name, p_ctlbk->rc );
2934                                         break;
2935                         }
2936                         break;
2937
2938                 case CONNECTION_REQUEST:
2939                         p_connect=(struct conncmd *)&(p_ctlbk->data);
2940                         printk(KERN_INFO "%s: Recv Conn Req: Vers=%d,link_id=%d,"
2941                                 "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
2942                                 dev->name,
2943                                 p_ctlbk->version,
2944                                 p_ctlbk->linkid,
2945                                 p_ctlbk->correlator,
2946                                 p_connect->host_name,
2947                                 p_connect->WS_name);
2948                         if (privptr->active_link_ID!=0 ) {
2949                                 claw_snd_disc(dev, p_ctlbk);
2950                                 printk(KERN_INFO "%s: Conn Req error : "
2951                                         "already logical link is active \n",
2952                                         dev->name);
2953                         }
2954                         if (p_ctlbk->linkid!=1 ) {
2955                                 claw_snd_disc(dev, p_ctlbk);
2956                                 printk(KERN_INFO "%s: Conn Req error : "
2957                                         "req logical link id is not 1\n",
2958                                         dev->name);
2959                         }
2960                         rc=find_link(dev,
2961                                 p_connect->host_name, p_connect->WS_name);
2962                         if (rc!=0) {
2963                                 claw_snd_disc(dev, p_ctlbk);
2964                                 printk(KERN_INFO "%s: Conn Req error : "
2965                                         "req appl name does not match\n",
2966                                          dev->name);
2967                         }
2968                         claw_send_control(dev,
2969                                 CONNECTION_CONFIRM, p_ctlbk->linkid,
2970                                 p_ctlbk->correlator,
2971                                 0, p_connect->host_name,
2972                                 p_connect->WS_name);
2973                         if (p_env->packing == PACKING_ASK) {
2974                                 printk("%s: Now Pack ask\n",dev->name);
2975                                 p_env->packing = PACK_SEND;
2976                                 claw_snd_conn_req(dev,0);
2977                         }
2978                         printk(KERN_INFO "%s: CLAW device %.8s: Connection "
2979                                 "completed link_id=%d.\n",
2980                                 dev->name, temp_ws_name,
2981                                 p_ctlbk->linkid);
2982                         privptr->active_link_ID=p_ctlbk->linkid;
2983                         p_ch=&privptr->channel[WRITE];
2984                         wake_up(&p_ch->wait);  /* wake up claw_open ( WRITE) */
2985                         break;
2986                 case CONNECTION_RESPONSE:
2987                         p_connect=(struct conncmd *)&(p_ctlbk->data);
2988                         printk(KERN_INFO "%s: Revc Conn Resp: Vers=%d,link_id=%d,"
2989                                 "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
2990                                 dev->name,
2991                                 p_ctlbk->version,
2992                                 p_ctlbk->linkid,
2993                                 p_ctlbk->correlator,
2994                                 p_ctlbk->rc,
2995                                 p_connect->host_name,
2996                                 p_connect->WS_name);
2997
2998                         if (p_ctlbk->rc !=0 ) {
2999                                 printk(KERN_INFO "%s: Conn Resp error: rc=%d \n",
3000                                         dev->name, p_ctlbk->rc);
3001                                 return 1;
3002                         }
3003                         rc=find_link(dev,
3004                                 p_connect->host_name, p_connect->WS_name);
3005                         if (rc!=0) {
3006                                 claw_snd_disc(dev, p_ctlbk);
3007                                 printk(KERN_INFO "%s: Conn Resp error: "
3008                                         "req appl name does not match\n",
3009                                          dev->name);
3010                         }
3011                         /* should be until CONNECTION_CONFIRM */
3012                         privptr->active_link_ID =  - (p_ctlbk->linkid);
3013                         break;
3014                 case CONNECTION_CONFIRM:
3015                         p_connect=(struct conncmd *)&(p_ctlbk->data);
3016                         printk(KERN_INFO "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
3017                                 "Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
3018                         dev->name,
3019                         p_ctlbk->version,
3020                         p_ctlbk->linkid,
3021                         p_ctlbk->correlator,
3022                         p_connect->host_name,
3023                         p_connect->WS_name);
3024                         if (p_ctlbk->linkid== -(privptr->active_link_ID)) {
3025                                 privptr->active_link_ID=p_ctlbk->linkid;
3026                                 if (p_env->packing > PACKING_ASK) {
3027                                         printk(KERN_INFO "%s: Confirmed Now packing\n",dev->name);
3028                                         p_env->packing = DO_PACKED;
3029                                         }
3030                                 p_ch=&privptr->channel[WRITE];
3031                                 wake_up(&p_ch->wait);
3032                         }
3033                         else {
3034                                 printk(KERN_INFO "%s: Conn confirm: "
3035                                         "unexpected linkid=%d \n",
3036                                         dev->name, p_ctlbk->linkid);
3037                                 claw_snd_disc(dev, p_ctlbk);
3038                         }
3039                         break;
3040                 case DISCONNECT:
3041                         printk(KERN_INFO "%s: Disconnect: "
3042                                 "Vers=%d,link_id=%d,Corr=%d\n",
3043                                 dev->name, p_ctlbk->version,
3044                                 p_ctlbk->linkid, p_ctlbk->correlator);
3045                         if ((p_ctlbk->linkid == 2) &&
3046                             (p_env->packing == PACK_SEND)) {
3047                                 privptr->active_link_ID = 1;
3048                                 p_env->packing = DO_PACKED;
3049                         }
3050                         else
3051                                 privptr->active_link_ID=0;
3052                         break;
3053                 case CLAW_ERROR:
3054                         printk(KERN_INFO "%s: CLAW ERROR detected\n",
3055                                 dev->name);
3056                         break;
3057                 default:
3058                         printk(KERN_INFO "%s:  Unexpected command code=%d \n",
3059                                 dev->name,  p_ctlbk->command);
3060                         break;
3061         }
3062
3063 #ifdef FUNCTRACE
3064         printk(KERN_INFO "%s: %s() exit on line %d, rc = 0\n",
3065                 dev->name,__FUNCTION__,__LINE__);
3066 #endif
3067
3068         return 0;
3069 }   /*    end of claw_process_control    */
3070
3071
3072 /*-------------------------------------------------------------------*
3073 *               claw_send_control                                    *
3074 *                                                                    *
3075 *--------------------------------------------------------------------*/
3076
3077 static int
3078 claw_send_control(struct net_device *dev, __u8 type, __u8 link,
3079          __u8 correlator, __u8 rc, char *local_name, char *remote_name)
3080 {
3081         struct claw_privbk              *privptr;
3082         struct clawctl                  *p_ctl;
3083         struct sysval                   *p_sysval;
3084         struct conncmd                  *p_connect;
3085         struct sk_buff                  *skb;
3086
3087 #ifdef FUNCTRACE
3088         printk(KERN_INFO "%s:%s > enter  \n",dev->name,__FUNCTION__);
3089 #endif
3090         CLAW_DBF_TEXT(2,setup,"sndcntl");
3091 #ifdef DEBUGMSG
3092         printk(KERN_INFO "%s: Sending Control Packet \n",dev->name);
3093         printk(KERN_INFO "%s: variable type = 0x%X, link = "
3094                 "%d, correlator = %d, rc = %d\n",
3095                 dev->name,type, link, correlator, rc);
3096         printk(KERN_INFO "%s: variable local_name = %s, "
3097                 "remote_name = %s\n",dev->name, local_name, remote_name);
3098 #endif
3099         privptr=dev->priv;
3100         p_ctl=(struct clawctl *)&privptr->ctl_bk;
3101
3102         p_ctl->command=type;
3103         p_ctl->version=CLAW_VERSION_ID;
3104         p_ctl->linkid=link;
3105         p_ctl->correlator=correlator;
3106         p_ctl->rc=rc;
3107
3108         p_sysval=(struct sysval *)&p_ctl->data;
3109         p_connect=(struct conncmd *)&p_ctl->data;
3110
3111         switch (p_ctl->command) {
3112                 case SYSTEM_VALIDATE_REQUEST:
3113                 case SYSTEM_VALIDATE_RESPONSE:
3114                         memcpy(&p_sysval->host_name, local_name, 8);
3115                         memcpy(&p_sysval->WS_name, remote_name, 8);
3116                         if (privptr->p_env->packing > 0) {
3117                                 p_sysval->read_frame_size=DEF_PACK_BUFSIZE;
3118                                 p_sysval->write_frame_size=DEF_PACK_BUFSIZE;
3119                         } else {
3120                                 /* how big is the piggest group of packets */
3121                                 p_sysval->read_frame_size=privptr->p_env->read_size;
3122                                 p_sysval->write_frame_size=privptr->p_env->write_size;
3123                         }
3124                         memset(&p_sysval->reserved, 0x00, 4);
3125                         break;
3126                 case CONNECTION_REQUEST:
3127                 case CONNECTION_RESPONSE:
3128                 case CONNECTION_CONFIRM:
3129                 case DISCONNECT:
3130                         memcpy(&p_sysval->host_name, local_name, 8);
3131                         memcpy(&p_sysval->WS_name, remote_name, 8);
3132                         if (privptr->p_env->packing > 0) {
3133                         /* How big is the biggest packet */
3134                                 p_connect->reserved1[0]=CLAW_FRAME_SIZE;
3135                                 p_connect->reserved1[1]=CLAW_FRAME_SIZE;
3136                         } else {
3137                                 memset(&p_connect->reserved1, 0x00, 4);
3138                                 memset(&p_connect->reserved2, 0x00, 4);
3139                         }
3140                         break;
3141                 default:
3142                         break;
3143         }
3144
3145         /*      write Control Record to the device                   */
3146
3147
3148         skb = dev_alloc_skb(sizeof(struct clawctl));
3149         if (!skb) {
3150                 printk(  "%s:%s low on mem, returning...\n",
3151                         dev->name,__FUNCTION__);
3152 #ifdef DEBUG
3153                 printk(KERN_INFO "%s:%s Exit, rc = ENOMEM\n",
3154                         dev->name,__FUNCTION__);
3155 #endif
3156                 return -ENOMEM;
3157         }
3158         memcpy(skb_put(skb, sizeof(struct clawctl)),
3159                 p_ctl, sizeof(struct clawctl));
3160 #ifdef IOTRACE
3161          printk(KERN_INFO "%s: outbnd claw cntl data \n",dev->name);
3162         dumpit((char *)p_ctl,sizeof(struct clawctl));
3163 #endif
3164         if (privptr->p_env->packing >= PACK_SEND)
3165                 claw_hw_tx(skb, dev, 1);
3166         else
3167                 claw_hw_tx(skb, dev, 0);
3168 #ifdef FUNCTRACE
3169         printk(KERN_INFO "%s:%s Exit on line %d\n",
3170                 dev->name,__FUNCTION__,__LINE__);
3171 #endif
3172
3173         return 0;
3174 }  /*   end of claw_send_control  */
3175
3176 /*-------------------------------------------------------------------*
3177 *               claw_snd_conn_req                                    *
3178 *                                                                    *
3179 *--------------------------------------------------------------------*/
3180 static int
3181 claw_snd_conn_req(struct net_device *dev, __u8 link)
3182 {
3183         int                rc;
3184         struct claw_privbk *privptr=dev->priv;
3185         struct clawctl     *p_ctl;
3186
3187 #ifdef FUNCTRACE
3188         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
3189 #endif
3190         CLAW_DBF_TEXT(2,setup,"snd_conn");
3191 #ifdef  DEBUGMSG
3192         printk(KERN_INFO "%s: variable link = %X, dev =\n",dev->name, link);
3193         dumpit((char *) dev, sizeof(struct net_device));
3194 #endif
3195         rc = 1;
3196         p_ctl=(struct clawctl *)&privptr->ctl_bk;
3197         p_ctl->linkid = link;
3198         if ( privptr->system_validate_comp==0x00 ) {
3199 #ifdef FUNCTRACE
3200                 printk(KERN_INFO "%s:%s Exit on line %d, rc = 1\n",
3201                         dev->name,__FUNCTION__,__LINE__);
3202 #endif
3203                 return rc;
3204         }
3205         if (privptr->p_env->packing == PACKING_ASK )
3206                 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3207                         WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
3208         if (privptr->p_env->packing == PACK_SEND)  {
3209                 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3210                         WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
3211         }
3212         if (privptr->p_env->packing == 0)
3213                 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3214                         HOST_APPL_NAME, privptr->p_env->api_type);
3215 #ifdef FUNCTRACE
3216         printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3217                 dev->name,__FUNCTION__,__LINE__, rc);
3218 #endif
3219         return rc;
3220
3221 }  /*  end of claw_snd_conn_req */
3222
3223
3224 /*-------------------------------------------------------------------*
3225 *               claw_snd_disc                                        *
3226 *                                                                    *
3227 *--------------------------------------------------------------------*/
3228
3229 static int
3230 claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
3231 {
3232         int rc;
3233         struct conncmd *  p_connect;
3234
3235 #ifdef FUNCTRACE
3236         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3237 #endif
3238         CLAW_DBF_TEXT(2,setup,"snd_dsc");
3239 #ifdef  DEBUGMSG
3240         printk(KERN_INFO "%s: variable dev =\n",dev->name);
3241         dumpit((char *) dev, sizeof(struct net_device));
3242         printk(KERN_INFO "%s: variable p_ctl",dev->name);
3243         dumpit((char *) p_ctl, sizeof(struct clawctl));
3244 #endif
3245         p_connect=(struct conncmd *)&p_ctl->data;
3246
3247         rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
3248                 p_ctl->correlator, 0,
3249                 p_connect->host_name, p_connect->WS_name);
3250 #ifdef FUNCTRACE
3251         printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3252                 dev->name,__FUNCTION__, __LINE__, rc);
3253 #endif
3254         return rc;
3255 }     /*   end of claw_snd_disc    */
3256
3257
3258 /*-------------------------------------------------------------------*
3259 *               claw_snd_sys_validate_rsp                            *
3260 *                                                                    *
3261 *--------------------------------------------------------------------*/
3262
3263 static int
3264 claw_snd_sys_validate_rsp(struct net_device *dev,
3265         struct clawctl *p_ctl, __u32 return_code)
3266 {
3267         struct claw_env *  p_env;
3268         struct claw_privbk *privptr;
3269         int    rc;
3270
3271 #ifdef FUNCTRACE
3272         printk(KERN_INFO "%s:%s Enter\n",
3273                 dev->name,__FUNCTION__);
3274 #endif
3275         CLAW_DBF_TEXT(2,setup,"chkresp");
3276 #ifdef DEBUGMSG
3277         printk(KERN_INFO "%s: variable return_code = %d, dev =\n",
3278                 dev->name, return_code);
3279         dumpit((char *) dev, sizeof(struct net_device));
3280         printk(KERN_INFO "%s: variable p_ctl =\n",dev->name);
3281         dumpit((char *) p_ctl, sizeof(struct clawctl));
3282 #endif
3283         privptr = dev->priv;
3284         p_env=privptr->p_env;
3285         rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
3286                 p_ctl->linkid,
3287                 p_ctl->correlator,
3288                 return_code,
3289                 p_env->host_name,
3290                 p_env->adapter_name  );
3291 #ifdef FUNCTRACE
3292         printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3293                 dev->name,__FUNCTION__,__LINE__, rc);
3294 #endif
3295         return rc;
3296 }     /*    end of claw_snd_sys_validate_rsp    */
3297
3298 /*-------------------------------------------------------------------*
3299 *               claw_strt_conn_req                                   *
3300 *                                                                    *
3301 *--------------------------------------------------------------------*/
3302
3303 static int
3304 claw_strt_conn_req(struct net_device *dev )
3305 {
3306         int rc;
3307
3308 #ifdef FUNCTRACE
3309         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3310 #endif
3311         CLAW_DBF_TEXT(2,setup,"conn_req");
3312 #ifdef DEBUGMSG
3313         printk(KERN_INFO "%s: variable dev =\n",dev->name);
3314         dumpit((char *) dev, sizeof(struct net_device));
3315 #endif
3316         rc=claw_snd_conn_req(dev, 1);
3317 #ifdef FUNCTRACE
3318         printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3319                 dev->name,__FUNCTION__,__LINE__, rc);
3320 #endif
3321         return rc;
3322 }    /*   end of claw_strt_conn_req   */
3323
3324
3325
3326 /*-------------------------------------------------------------------*
3327  *   claw_stats                                                      *
3328  *-------------------------------------------------------------------*/
3329
3330 static struct
3331 net_device_stats *claw_stats(struct net_device *dev)
3332 {
3333         struct claw_privbk *privptr;
3334 #ifdef FUNCTRACE
3335         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3336 #endif
3337         CLAW_DBF_TEXT(4,trace,"stats");
3338         privptr = dev->priv;
3339 #ifdef FUNCTRACE
3340         printk(KERN_INFO "%s:%s Exit on line %d\n",
3341                 dev->name,__FUNCTION__,__LINE__);
3342 #endif
3343         return &privptr->stats;
3344 }     /*   end of claw_stats   */
3345
3346
3347 /*-------------------------------------------------------------------*
3348 *       unpack_read                                                  *
3349 *                                                                    *
3350 *--------------------------------------------------------------------*/
3351 static void
3352 unpack_read(struct net_device *dev )
3353 {
3354         struct sk_buff *skb;
3355         struct claw_privbk *privptr;
3356         struct claw_env    *p_env;
3357         struct ccwbk    *p_this_ccw;
3358         struct ccwbk    *p_first_ccw;
3359         struct ccwbk    *p_last_ccw;
3360         struct clawph   *p_packh;
3361         void            *p_packd;
3362         struct clawctl  *p_ctlrec=NULL;
3363
3364         __u32   len_of_data;
3365         __u32   pack_off;
3366         __u8    link_num;
3367         __u8    mtc_this_frm=0;
3368         __u32   bytes_to_mov;
3369         struct chbk *p_ch = NULL;
3370         int     i=0;
3371         int     p=0;
3372
3373 #ifdef FUNCTRACE
3374         printk(KERN_INFO "%s:%s enter  \n",dev->name,__FUNCTION__);
3375 #endif
3376         CLAW_DBF_TEXT(4,trace,"unpkread");
3377         p_first_ccw=NULL;
3378         p_last_ccw=NULL;
3379         p_packh=NULL;
3380         p_packd=NULL;
3381         privptr=dev->priv;
3382         p_env = privptr->p_env;
3383         p_this_ccw=privptr->p_read_active_first;
3384         i=0;
3385         while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
3386 #ifdef IOTRACE
3387                 printk(KERN_INFO "%s p_this_ccw \n",dev->name);
3388                 dumpit((char*)p_this_ccw, sizeof(struct ccwbk));
3389                 printk(KERN_INFO "%s Inbound p_this_ccw->p_buffer(64)"
3390                         " pk=%d \n",dev->name,p_env->packing);
3391                 dumpit((char *)p_this_ccw->p_buffer, 64 );
3392 #endif
3393                 pack_off = 0;
3394                 p = 0;
3395                 p_this_ccw->header.flag=CLAW_PENDING;
3396                 privptr->p_read_active_first=p_this_ccw->next;
3397                 p_this_ccw->next=NULL;
3398                 p_packh = (struct clawph *)p_this_ccw->p_buffer;
3399                 if ((p_env->packing == PACK_SEND) &&
3400                     (p_packh->len == 32)           &&
3401                     (p_packh->link_num == 0)) {   /* is it a packed ctl rec? */
3402                         p_packh++;  /* peek past pack header */
3403                         p_ctlrec = (struct clawctl *)p_packh;
3404                         p_packh--;  /* un peek */
3405                         if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
3406                             (p_ctlrec->command == CONNECTION_CONFIRM))
3407                                 p_env->packing = DO_PACKED;
3408                 }
3409                 if (p_env->packing == DO_PACKED)
3410                         link_num=p_packh->link_num;
3411                 else
3412                         link_num=p_this_ccw->header.opcode / 8;
3413                 if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
3414 #ifdef DEBUGMSG
3415                         printk(KERN_INFO "%s: %s > More_to_come is ON\n",
3416                         dev->name,__FUNCTION__);
3417 #endif
3418                         mtc_this_frm=1;
3419                         if (p_this_ccw->header.length!=
3420                                 privptr->p_env->read_size ) {
3421                                 printk(KERN_INFO " %s: Invalid frame detected "
3422                                         "length is %02x\n" ,
3423                                         dev->name, p_this_ccw->header.length);
3424                         }
3425                 }
3426
3427                 if (privptr->mtc_skipping) {
3428                         /*
3429                         *   We're in the mode of skipping past a
3430                         *   multi-frame message
3431                         *   that we can't process for some reason or other.
3432                         *   The first frame without the More-To-Come flag is
3433                         *   the last frame of the skipped message.
3434                         */
3435                         /*  in case of More-To-Come not set in this frame */
3436                         if (mtc_this_frm==0) {
3437                                 privptr->mtc_skipping=0; /* Ok, the end */
3438                                 privptr->mtc_logical_link=-1;
3439                         }
3440 #ifdef DEBUGMSG
3441                         printk(KERN_INFO "%s:%s goto next "
3442                                 "frame from MoretoComeSkip \n",
3443                                 dev->name,__FUNCTION__);
3444 #endif
3445                         goto NextFrame;
3446                 }
3447
3448                 if (link_num==0) {
3449                         claw_process_control(dev, p_this_ccw);
3450 #ifdef DEBUGMSG
3451                         printk(KERN_INFO "%s:%s goto next "
3452                                 "frame from claw_process_control \n",
3453                                 dev->name,__FUNCTION__);
3454 #endif
3455                         CLAW_DBF_TEXT(4,trace,"UnpkCntl");
3456                         goto NextFrame;
3457                 }
3458 unpack_next:
3459                 if (p_env->packing == DO_PACKED) {
3460                         if (pack_off > p_env->read_size)
3461                                 goto NextFrame;
3462                         p_packd = p_this_ccw->p_buffer+pack_off;
3463                         p_packh = (struct clawph *) p_packd;
3464                         if ((p_packh->len == 0) || /* all done with this frame? */
3465                             (p_packh->flag != 0))
3466                                 goto NextFrame;
3467                         bytes_to_mov = p_packh->len;
3468                         pack_off += bytes_to_mov+sizeof(struct clawph);
3469                         p++;
3470                 } else {
3471                         bytes_to_mov=p_this_ccw->header.length;
3472                 }
3473                 if (privptr->mtc_logical_link<0) {
3474 #ifdef DEBUGMSG
3475                 printk(KERN_INFO "%s: %s mtc_logical_link < 0  \n",
3476                         dev->name,__FUNCTION__);
3477 #endif
3478
3479                 /*
3480                 *  if More-To-Come is set in this frame then we don't know
3481                 *  length of entire message, and hence have to allocate
3482                 *  large buffer   */
3483
3484                 /*      We are starting a new envelope  */
3485                 privptr->mtc_offset=0;
3486                         privptr->mtc_logical_link=link_num;
3487                 }
3488
3489                 if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
3490                         /*      error     */
3491 #ifdef DEBUGMSG
3492                         printk(KERN_INFO "%s: %s > goto next "
3493                                 "frame from MoretoComeSkip \n",
3494                                 dev->name,
3495                                 __FUNCTION__);
3496                         printk(KERN_INFO "      bytes_to_mov %d > (MAX_ENVELOPE_"
3497                                 "SIZE-privptr->mtc_offset %d)\n",
3498                                 bytes_to_mov,(MAX_ENVELOPE_SIZE- privptr->mtc_offset));
3499 #endif
3500                         privptr->stats.rx_frame_errors++;
3501                         goto NextFrame;
3502                 }
3503                 if (p_env->packing == DO_PACKED) {
3504                         memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
3505                                 p_packd+sizeof(struct clawph), bytes_to_mov);
3506
3507                 } else  {
3508                         memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
3509                                 p_this_ccw->p_buffer, bytes_to_mov);
3510                 }
3511 #ifdef DEBUGMSG
3512                 printk(KERN_INFO "%s: %s() received data \n",
3513                         dev->name,__FUNCTION__);
3514                 if (p_env->packing == DO_PACKED)
3515                         dumpit((char *)p_packd+sizeof(struct clawph),32);
3516                 else
3517                         dumpit((char *)p_this_ccw->p_buffer, 32);
3518                 printk(KERN_INFO "%s: %s() bytelength %d \n",
3519                         dev->name,__FUNCTION__,bytes_to_mov);
3520 #endif
3521                 if (mtc_this_frm==0) {
3522                         len_of_data=privptr->mtc_offset+bytes_to_mov;
3523                         skb=dev_alloc_skb(len_of_data);
3524                         if (skb) {
3525                                 memcpy(skb_put(skb,len_of_data),
3526                                         privptr->p_mtc_envelope,
3527                                         len_of_data);
3528                                 skb->mac.raw=skb->data;
3529                                 skb->dev=dev;
3530                                 skb->protocol=htons(ETH_P_IP);
3531                                 skb->ip_summed=CHECKSUM_UNNECESSARY;
3532                                 privptr->stats.rx_packets++;
3533                                 privptr->stats.rx_bytes+=len_of_data;
3534                                 netif_rx(skb);
3535 #ifdef DEBUGMSG
3536                                 printk(KERN_INFO "%s: %s() netif_"
3537                                         "rx(skb) completed \n",
3538                                         dev->name,__FUNCTION__);
3539 #endif
3540                         }
3541                         else {
3542                                 privptr->stats.rx_dropped++;
3543                                 printk(KERN_WARNING "%s: %s() low on memory\n",
3544                                 dev->name,__FUNCTION__);
3545                         }
3546                         privptr->mtc_offset=0;
3547                         privptr->mtc_logical_link=-1;
3548                 }
3549                 else {
3550                         privptr->mtc_offset+=bytes_to_mov;
3551                 }
3552                 if (p_env->packing == DO_PACKED)
3553                         goto unpack_next;
3554 NextFrame:
3555                 /*
3556                 *   Remove ThisCCWblock from active read queue, and add it
3557                 *   to queue of free blocks to be reused.
3558                 */
3559                 i++;
3560                 p_this_ccw->header.length=0xffff;
3561                 p_this_ccw->header.opcode=0xff;
3562                 /*
3563                 *       add this one to the free queue for later reuse
3564                 */
3565                 if (p_first_ccw==NULL) {
3566                         p_first_ccw = p_this_ccw;
3567                 }
3568                 else {
3569                         p_last_ccw->next = p_this_ccw;
3570                 }
3571                 p_last_ccw = p_this_ccw;
3572                 /*
3573                 *       chain to next block on active read queue
3574                 */
3575                 p_this_ccw = privptr->p_read_active_first;
3576                 CLAW_DBF_TEXT_(4,trace,"rxpkt %d",p);
3577         } /* end of while */
3578
3579         /*      check validity                  */
3580
3581 #ifdef IOTRACE
3582         printk(KERN_INFO "%s:%s processed frame is %d \n",
3583                 dev->name,__FUNCTION__,i);
3584         printk(KERN_INFO "%s:%s  F:%lx L:%lx\n",
3585                 dev->name,
3586                 __FUNCTION__,
3587                 (unsigned long)p_first_ccw,
3588                 (unsigned long)p_last_ccw);
3589 #endif
3590         CLAW_DBF_TEXT_(4,trace,"rxfrm %d",i);
3591         add_claw_reads(dev, p_first_ccw, p_last_ccw);
3592         p_ch=&privptr->channel[READ];
3593         claw_strt_read(dev, LOCK_YES);
3594 #ifdef FUNCTRACE
3595         printk(KERN_INFO "%s: %s exit on line %d\n",
3596                 dev->name, __FUNCTION__, __LINE__);
3597 #endif
3598         return;
3599 }     /*  end of unpack_read   */
3600
3601 /*-------------------------------------------------------------------*
3602 *       claw_strt_read                                               *
3603 *                                                                    *
3604 *--------------------------------------------------------------------*/
3605 static void
3606 claw_strt_read (struct net_device *dev, int lock )
3607 {
3608         int        rc = 0;
3609         __u32      parm;
3610         unsigned long  saveflags = 0;
3611         struct claw_privbk *privptr=dev->priv;
3612         struct ccwbk*p_ccwbk;
3613         struct chbk *p_ch;
3614         struct clawh *p_clawh;
3615         p_ch=&privptr->channel[READ];
3616
3617 #ifdef FUNCTRACE
3618         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
3619         printk(KERN_INFO "%s: variable lock = %d, dev =\n",dev->name, lock);
3620         dumpit((char *) dev, sizeof(struct net_device));
3621 #endif
3622         CLAW_DBF_TEXT(4,trace,"StRdNter");
3623         p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
3624         p_clawh->flag=CLAW_IDLE;    /* 0x00 */
3625
3626         if ((privptr->p_write_active_first!=NULL &&
3627              privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
3628             (privptr->p_read_active_first!=NULL &&
3629              privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
3630                 p_clawh->flag=CLAW_BUSY;    /* 0xff */
3631         }
3632 #ifdef DEBUGMSG
3633         printk(KERN_INFO "%s:%s state-%02x\n" ,
3634                 dev->name,__FUNCTION__, p_ch->claw_state);
3635 #endif
3636         if (lock==LOCK_YES) {
3637                 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
3638         }
3639         if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
3640 #ifdef DEBUGMSG
3641                 printk(KERN_INFO "%s: HOT READ started in %s\n" ,
3642                         dev->name,__FUNCTION__);
3643                 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
3644                 dumpit((char *)&p_clawh->flag , 1);
3645 #endif
3646                 CLAW_DBF_TEXT(4,trace,"HotRead");
3647                 p_ccwbk=privptr->p_read_active_first;
3648                 parm = (unsigned long) p_ch;
3649                 rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
3650                                        0xff, 0);
3651                 if (rc != 0) {
3652                         ccw_check_return_code(p_ch->cdev, rc);
3653                 }
3654         }
3655         else {
3656 #ifdef DEBUGMSG
3657                 printk(KERN_INFO "%s: No READ started by %s() In progress\n" ,
3658                         dev->name,__FUNCTION__);
3659 #endif
3660                 CLAW_DBF_TEXT(2,trace,"ReadAct");
3661         }
3662
3663         if (lock==LOCK_YES) {
3664                 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
3665         }
3666 #ifdef FUNCTRACE
3667         printk(KERN_INFO "%s:%s Exit on line %d\n",
3668                 dev->name,__FUNCTION__,__LINE__);
3669 #endif
3670         CLAW_DBF_TEXT(4,trace,"StRdExit");
3671         return;
3672 }       /*    end of claw_strt_read    */
3673
3674 /*-------------------------------------------------------------------*
3675 *       claw_strt_out_IO                                             *
3676 *                                                                    *
3677 *--------------------------------------------------------------------*/
3678
3679 static void
3680 claw_strt_out_IO( struct net_device *dev )
3681 {
3682         int                     rc = 0;
3683         unsigned long           parm;
3684         struct claw_privbk      *privptr;
3685         struct chbk             *p_ch;
3686         struct ccwbk    *p_first_ccw;
3687
3688 #ifdef FUNCTRACE
3689         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3690 #endif
3691         if (!dev) {
3692                 return;
3693         }
3694         privptr=(struct claw_privbk *)dev->priv;
3695         p_ch=&privptr->channel[WRITE];
3696
3697 #ifdef DEBUGMSG
3698         printk(KERN_INFO "%s:%s state-%02x\n" ,
3699                 dev->name,__FUNCTION__,p_ch->claw_state);
3700 #endif
3701         CLAW_DBF_TEXT(4,trace,"strt_io");
3702         p_first_ccw=privptr->p_write_active_first;
3703
3704         if (p_ch->claw_state == CLAW_STOP)
3705                 return;
3706         if (p_first_ccw == NULL) {
3707 #ifdef FUNCTRACE
3708                 printk(KERN_INFO "%s:%s Exit on line %d\n",
3709                         dev->name,__FUNCTION__,__LINE__);
3710 #endif
3711                 return;
3712         }
3713         if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
3714                 parm = (unsigned long) p_ch;
3715 #ifdef DEBUGMSG
3716                 printk(KERN_INFO "%s:%s do_io \n" ,dev->name,__FUNCTION__);
3717                 dumpit((char *)p_first_ccw, sizeof(struct ccwbk));
3718 #endif
3719                 CLAW_DBF_TEXT(2,trace,"StWrtIO");
3720                 rc = ccw_device_start (p_ch->cdev,&p_first_ccw->write, parm,
3721                                        0xff, 0);
3722                 if (rc != 0) {
3723                         ccw_check_return_code(p_ch->cdev, rc);
3724                 }
3725         }
3726         dev->trans_start = jiffies;
3727 #ifdef FUNCTRACE
3728         printk(KERN_INFO "%s:%s Exit on line %d\n",
3729                 dev->name,__FUNCTION__,__LINE__);
3730 #endif
3731
3732         return;
3733 }       /*    end of claw_strt_out_IO    */
3734
3735 /*-------------------------------------------------------------------*
3736 *       Free write buffers                                           *
3737 *                                                                    *
3738 *--------------------------------------------------------------------*/
3739
3740 static void
3741 claw_free_wrt_buf( struct net_device *dev )
3742 {
3743
3744         struct claw_privbk *privptr=(struct claw_privbk *)dev->priv;
3745         struct ccwbk*p_first_ccw;
3746         struct ccwbk*p_last_ccw;
3747         struct ccwbk*p_this_ccw;
3748         struct ccwbk*p_next_ccw;
3749 #ifdef IOTRACE
3750         struct ccwbk*p_buf;
3751 #endif
3752 #ifdef FUNCTRACE
3753         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3754         printk(KERN_INFO "%s: free count = %d  variable dev =\n",
3755                 dev->name,privptr->write_free_count);
3756 #endif
3757         CLAW_DBF_TEXT(4,trace,"freewrtb");
3758         /*  scan the write queue to free any completed write packets   */
3759         p_first_ccw=NULL;
3760         p_last_ccw=NULL;
3761 #ifdef IOTRACE
3762         printk(KERN_INFO "%s:  Dump current CCW chain \n",dev->name  );
3763         p_buf=privptr->p_write_active_first;
3764         while (p_buf!=NULL) {
3765                 dumpit((char *)p_buf, sizeof(struct ccwbk));
3766                 p_buf=p_buf->next;
3767         }
3768         if (p_buf==NULL) {
3769                 printk(KERN_INFO "%s: privptr->p_write_"
3770                         "active_first==NULL\n",dev->name  );
3771         }
3772         p_buf=(struct ccwbk*)privptr->p_end_ccw;
3773         dumpit((char *)p_buf, sizeof(struct endccw));
3774 #endif
3775         p_this_ccw=privptr->p_write_active_first;
3776         while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
3777         {
3778                 p_next_ccw = p_this_ccw->next;
3779                 if (((p_next_ccw!=NULL) &&
3780                      (p_next_ccw->header.flag!=CLAW_PENDING)) ||
3781                     ((p_this_ccw == privptr->p_write_active_last) &&
3782                      (p_this_ccw->header.flag!=CLAW_PENDING))) {
3783                         /* The next CCW is OK or this is  */
3784                         /* the last CCW...free it   @A1A  */
3785                         privptr->p_write_active_first=p_this_ccw->next;
3786                         p_this_ccw->header.flag=CLAW_PENDING;
3787                         p_this_ccw->next=privptr->p_write_free_chain;
3788                         privptr->p_write_free_chain=p_this_ccw;
3789                         ++privptr->write_free_count;
3790                         privptr->stats.tx_bytes+= p_this_ccw->write.count;
3791                         p_this_ccw=privptr->p_write_active_first;
3792                         privptr->stats.tx_packets++;
3793                 }
3794                 else {
3795                         break;
3796                 }
3797         }
3798         if (privptr->write_free_count!=0) {
3799                 claw_clearbit_busy(TB_NOBUFFER,dev);
3800         }
3801         /*   whole chain removed?   */
3802         if (privptr->p_write_active_first==NULL) {
3803                 privptr->p_write_active_last=NULL;
3804 #ifdef DEBUGMSG
3805                 printk(KERN_INFO "%s:%s p_write_"
3806                         "active_first==NULL\n",dev->name,__FUNCTION__);
3807 #endif
3808         }
3809 #ifdef IOTRACE
3810         printk(KERN_INFO "%s: Dump arranged CCW chain \n",dev->name  );
3811         p_buf=privptr->p_write_active_first;
3812         while (p_buf!=NULL) {
3813                 dumpit((char *)p_buf, sizeof(struct ccwbk));
3814                 p_buf=p_buf->next;
3815         }
3816         if (p_buf==NULL) {
3817                 printk(KERN_INFO "%s: privptr->p_write_active_"
3818                         "first==NULL\n",dev->name  );
3819         }
3820         p_buf=(struct ccwbk*)privptr->p_end_ccw;
3821         dumpit((char *)p_buf, sizeof(struct endccw));
3822 #endif
3823
3824         CLAW_DBF_TEXT_(4,trace,"FWC=%d",privptr->write_free_count);
3825 #ifdef FUNCTRACE
3826         printk(KERN_INFO "%s:%s Exit on line %d free_count =%d\n",
3827                 dev->name,__FUNCTION__, __LINE__,privptr->write_free_count);
3828 #endif
3829         return;
3830 }
3831
3832 /*-------------------------------------------------------------------*
3833 *       claw free netdevice                                          *
3834 *                                                                    *
3835 *--------------------------------------------------------------------*/
3836 static void
3837 claw_free_netdevice(struct net_device * dev, int free_dev)
3838 {
3839         struct claw_privbk *privptr;
3840 #ifdef FUNCTRACE
3841         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3842 #endif
3843         CLAW_DBF_TEXT(2,setup,"free_dev");
3844
3845         if (!dev)
3846                 return;
3847         CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
3848         privptr = dev->priv;
3849         if (dev->flags & IFF_RUNNING)
3850                 claw_release(dev);
3851         if (privptr) {
3852                 privptr->channel[READ].ndev = NULL;  /* say it's free */
3853         }
3854         dev->priv=NULL;
3855 #ifdef MODULE
3856         if (free_dev) {
3857                 free_netdev(dev);
3858         }
3859 #endif
3860         CLAW_DBF_TEXT(2,setup,"feee_ok");
3861 #ifdef FUNCTRACE
3862         printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
3863 #endif
3864 }
3865
3866 /**
3867  * Claw init netdevice
3868  * Initialize everything of the net device except the name and the
3869  * channel structs.
3870  */
3871 static void
3872 claw_init_netdevice(struct net_device * dev)
3873 {
3874 #ifdef FUNCTRACE
3875         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3876 #endif
3877         CLAW_DBF_TEXT(2,setup,"init_dev");
3878         CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
3879         if (!dev) {
3880         printk(KERN_WARNING "claw:%s BAD Device exit line %d\n",
3881                 __FUNCTION__,__LINE__);
3882                 CLAW_DBF_TEXT(2,setup,"baddev");
3883                 return;
3884         }
3885         dev->mtu = CLAW_DEFAULT_MTU_SIZE;
3886         dev->hard_start_xmit = claw_tx;
3887         dev->open = claw_open;
3888         dev->stop = claw_release;
3889         dev->get_stats = claw_stats;
3890         dev->change_mtu = claw_change_mtu;
3891         dev->hard_header_len = 0;
3892         dev->addr_len = 0;
3893         dev->type = ARPHRD_SLIP;
3894         dev->tx_queue_len = 1300;
3895         dev->flags = IFF_POINTOPOINT | IFF_NOARP;
3896         SET_MODULE_OWNER(dev);
3897 #ifdef FUNCTRACE
3898         printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
3899 #endif
3900         CLAW_DBF_TEXT(2,setup,"initok");
3901         return;
3902 }
3903
3904 /**
3905  * Init a new channel in the privptr->channel[i].
3906  *
3907  * @param cdev  The ccw_device to be added.
3908  *
3909  * @return 0 on success, !0 on error.
3910  */
3911 static int
3912 add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
3913 {
3914         struct chbk *p_ch;
3915
3916 #ifdef FUNCTRACE
3917         printk(KERN_INFO "%s:%s Enter\n",cdev->dev.bus_id,__FUNCTION__);
3918 #endif
3919         CLAW_DBF_TEXT_(2,setup,"%s",cdev->dev.bus_id);
3920         privptr->channel[i].flag  = i+1;   /* Read is 1 Write is 2 */
3921         p_ch = &privptr->channel[i];
3922         p_ch->cdev = cdev;
3923         snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", cdev->dev.bus_id);
3924         sscanf(cdev->dev.bus_id+4,"%x",&p_ch->devno);
3925         if ((p_ch->irb = kmalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
3926                 printk(KERN_WARNING "%s Out of memory in %s for irb\n",
3927                         p_ch->id,__FUNCTION__);
3928 #ifdef FUNCTRACE
3929                 printk(KERN_INFO "%s:%s Exit on line %d\n",
3930                         p_ch->id,__FUNCTION__,__LINE__);
3931 #endif
3932                 return -ENOMEM;
3933         }
3934         memset(p_ch->irb, 0, sizeof (struct irb));
3935 #ifdef FUNCTRACE
3936                 printk(KERN_INFO "%s:%s Exit on line %d\n",
3937                         cdev->dev.bus_id,__FUNCTION__,__LINE__);
3938 #endif
3939         return 0;
3940 }
3941
3942
3943 /**
3944  *
3945  * Setup an interface.
3946  *
3947  * @param cgdev  Device to be setup.
3948  *
3949  * @returns 0 on success, !0 on failure.
3950  */
3951 static int
3952 claw_new_device(struct ccwgroup_device *cgdev)
3953 {
3954         struct claw_privbk *privptr;
3955         struct claw_env *p_env;
3956         struct net_device *dev;
3957         int ret;
3958
3959         pr_debug("%s() called\n", __FUNCTION__);
3960         printk(KERN_INFO "claw: add for %s\n",cgdev->cdev[READ]->dev.bus_id);
3961         CLAW_DBF_TEXT(2,setup,"new_dev");
3962         privptr = cgdev->dev.driver_data;
3963         cgdev->cdev[READ]->dev.driver_data = privptr;
3964         cgdev->cdev[WRITE]->dev.driver_data = privptr;
3965         if (!privptr)
3966                 return -ENODEV;
3967         p_env = privptr->p_env;
3968         sscanf(cgdev->cdev[READ]->dev.bus_id+4,"%x",
3969                 &p_env->devno[READ]);
3970         sscanf(cgdev->cdev[WRITE]->dev.bus_id+4,"%x",
3971                 &p_env->devno[WRITE]);
3972         ret = add_channel(cgdev->cdev[0],0,privptr);
3973         if (ret == 0)
3974                 ret = add_channel(cgdev->cdev[1],1,privptr);
3975         if (ret != 0) {
3976                         printk(KERN_WARNING
3977                         "add channel failed "
3978                                 "with ret = %d\n", ret);
3979                         goto out;
3980         }
3981         ret = ccw_device_set_online(cgdev->cdev[READ]);
3982         if (ret != 0) {
3983                 printk(KERN_WARNING
3984                  "claw: ccw_device_set_online %s READ failed "
3985                         "with ret = %d\n",cgdev->cdev[READ]->dev.bus_id,ret);
3986                 goto out;
3987         }
3988         ret = ccw_device_set_online(cgdev->cdev[WRITE]);
3989         if (ret != 0) {
3990                 printk(KERN_WARNING
3991                  "claw: ccw_device_set_online %s WRITE failed "
3992                         "with ret = %d\n",cgdev->cdev[WRITE]->dev.bus_id, ret);
3993                 goto out;
3994         }
3995         dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
3996         if (!dev) {
3997                 printk(KERN_WARNING "%s:alloc_netdev failed\n",__FUNCTION__);
3998                 goto out;
3999         }
4000         dev->priv = privptr;
4001         cgdev->dev.driver_data = privptr;
4002         cgdev->cdev[READ]->dev.driver_data = privptr;
4003         cgdev->cdev[WRITE]->dev.driver_data = privptr;
4004         /* sysfs magic */
4005         SET_NETDEV_DEV(dev, &cgdev->dev);
4006         if (register_netdev(dev) != 0) {
4007                 claw_free_netdevice(dev, 1);
4008                 CLAW_DBF_TEXT(2,trace,"regfail");
4009                 goto out;
4010         }
4011         dev->flags &=~IFF_RUNNING;
4012         if (privptr->buffs_alloc == 0) {
4013                 ret=init_ccw_bk(dev);
4014                 if (ret !=0) {
4015                         printk(KERN_WARNING
4016                          "claw: init_ccw_bk failed with ret=%d\n", ret);
4017                         unregister_netdev(dev);
4018                         claw_free_netdevice(dev,1);
4019                         CLAW_DBF_TEXT(2,trace,"ccwmem");
4020                         goto out;
4021                 }
4022         }
4023         privptr->channel[READ].ndev = dev;
4024         privptr->channel[WRITE].ndev = dev;
4025         privptr->p_env->ndev = dev;
4026
4027         printk(KERN_INFO "%s:readsize=%d  writesize=%d "
4028                 "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
4029                 dev->name, p_env->read_size,
4030                 p_env->write_size, p_env->read_buffers,
4031                 p_env->write_buffers, p_env->devno[READ],
4032                 p_env->devno[WRITE]);
4033         printk(KERN_INFO "%s:host_name:%.8s, adapter_name "
4034                 ":%.8s api_type: %.8s\n",
4035                 dev->name, p_env->host_name,
4036                 p_env->adapter_name , p_env->api_type);
4037         return 0;
4038 out:
4039         ccw_device_set_offline(cgdev->cdev[1]);
4040         ccw_device_set_offline(cgdev->cdev[0]);
4041
4042         return -ENODEV;
4043 }
4044
4045 static void
4046 claw_purge_skb_queue(struct sk_buff_head *q)
4047 {
4048         struct sk_buff *skb;
4049
4050         CLAW_DBF_TEXT(4,trace,"purgque");
4051
4052         while ((skb = skb_dequeue(q))) {
4053                 atomic_dec(&skb->users);
4054                 dev_kfree_skb_any(skb);
4055         }
4056 }
4057
4058 /**
4059  * Shutdown an interface.
4060  *
4061  * @param cgdev  Device to be shut down.
4062  *
4063  * @returns 0 on success, !0 on failure.
4064  */
4065 static int
4066 claw_shutdown_device(struct ccwgroup_device *cgdev)
4067 {
4068         struct claw_privbk *priv;
4069         struct net_device *ndev;
4070         int     ret;
4071
4072         pr_debug("%s() called\n", __FUNCTION__);
4073         CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
4074         priv = cgdev->dev.driver_data;
4075         if (!priv)
4076                 return -ENODEV;
4077         ndev = priv->channel[READ].ndev;
4078         if (ndev) {
4079                 /* Close the device */
4080                 printk(KERN_INFO
4081                         "%s: shuting down \n",ndev->name);
4082                 if (ndev->flags & IFF_RUNNING)
4083                         ret = claw_release(ndev);
4084                 ndev->flags &=~IFF_RUNNING;
4085                 unregister_netdev(ndev);
4086                 ndev->priv = NULL;  /* cgdev data, not ndev's to free */
4087                 claw_free_netdevice(ndev, 1);
4088                 priv->channel[READ].ndev = NULL;
4089                 priv->channel[WRITE].ndev = NULL;
4090                 priv->p_env->ndev = NULL;
4091         }
4092         ccw_device_set_offline(cgdev->cdev[1]);
4093         ccw_device_set_offline(cgdev->cdev[0]);
4094         return 0;
4095 }
4096
4097 static void
4098 claw_remove_device(struct ccwgroup_device *cgdev)
4099 {
4100         struct claw_privbk *priv;
4101
4102         pr_debug("%s() called\n", __FUNCTION__);
4103         CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
4104         priv = cgdev->dev.driver_data;
4105         if (!priv) {
4106                 printk(KERN_WARNING "claw: %s() no Priv exiting\n",__FUNCTION__);
4107                 return;
4108         }
4109         printk(KERN_INFO "claw: %s() called %s will be removed.\n",
4110                         __FUNCTION__,cgdev->cdev[0]->dev.bus_id);
4111         if (cgdev->state == CCWGROUP_ONLINE)
4112                 claw_shutdown_device(cgdev);
4113         claw_remove_files(&cgdev->dev);
4114         kfree(priv->p_mtc_envelope);
4115         priv->p_mtc_envelope=NULL;
4116         kfree(priv->p_env);
4117         priv->p_env=NULL;
4118         kfree(priv->channel[0].irb);
4119         priv->channel[0].irb=NULL;
4120         kfree(priv->channel[1].irb);
4121         priv->channel[1].irb=NULL;
4122         kfree(priv);
4123         cgdev->dev.driver_data=NULL;
4124         cgdev->cdev[READ]->dev.driver_data = NULL;
4125         cgdev->cdev[WRITE]->dev.driver_data = NULL;
4126         put_device(&cgdev->dev);
4127 }
4128
4129
4130 /*
4131  * sysfs attributes
4132  */
4133 static ssize_t
4134 claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
4135 {
4136         struct claw_privbk *priv;
4137         struct claw_env *  p_env;
4138
4139         priv = dev->driver_data;
4140         if (!priv)
4141                 return -ENODEV;
4142         p_env = priv->p_env;
4143         return sprintf(buf, "%s\n",p_env->host_name);
4144 }
4145
4146 static ssize_t
4147 claw_hname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4148 {
4149         struct claw_privbk *priv;
4150         struct claw_env *  p_env;
4151
4152         priv = dev->driver_data;
4153         if (!priv)
4154                 return -ENODEV;
4155         p_env = priv->p_env;
4156         if (count > MAX_NAME_LEN+1)
4157                 return -EINVAL;
4158         memset(p_env->host_name, 0x20, MAX_NAME_LEN);
4159         strncpy(p_env->host_name,buf, count);
4160         p_env->host_name[count-1] = 0x20;  /* clear extra 0x0a */
4161         p_env->host_name[MAX_NAME_LEN] = 0x00;
4162         CLAW_DBF_TEXT(2,setup,"HstnSet");
4163         CLAW_DBF_TEXT_(2,setup,"%s",p_env->host_name);
4164
4165         return count;
4166 }
4167
4168 static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
4169
4170 static ssize_t
4171 claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
4172 {
4173         struct claw_privbk *priv;
4174         struct claw_env *  p_env;
4175
4176         priv = dev->driver_data;
4177         if (!priv)
4178                 return -ENODEV;
4179         p_env = priv->p_env;
4180         return sprintf(buf, "%s\n",p_env->adapter_name);
4181 }
4182
4183 static ssize_t
4184 claw_adname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4185 {
4186         struct claw_privbk *priv;
4187         struct claw_env *  p_env;
4188
4189         priv = dev->driver_data;
4190         if (!priv)
4191                 return -ENODEV;
4192         p_env = priv->p_env;
4193         if (count > MAX_NAME_LEN+1)
4194                 return -EINVAL;
4195         memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
4196         strncpy(p_env->adapter_name,buf, count);
4197         p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
4198         p_env->adapter_name[MAX_NAME_LEN] = 0x00;
4199         CLAW_DBF_TEXT(2,setup,"AdnSet");
4200         CLAW_DBF_TEXT_(2,setup,"%s",p_env->adapter_name);
4201
4202         return count;
4203 }
4204
4205 static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
4206
4207 static ssize_t
4208 claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
4209 {
4210         struct claw_privbk *priv;
4211         struct claw_env *  p_env;
4212
4213         priv = dev->driver_data;
4214         if (!priv)
4215                 return -ENODEV;
4216         p_env = priv->p_env;
4217         return sprintf(buf, "%s\n",
4218                        p_env->api_type);
4219 }
4220
4221 static ssize_t
4222 claw_apname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4223 {
4224         struct claw_privbk *priv;
4225         struct claw_env *  p_env;
4226
4227         priv = dev->driver_data;
4228         if (!priv)
4229                 return -ENODEV;
4230         p_env = priv->p_env;
4231         if (count > MAX_NAME_LEN+1)
4232                 return -EINVAL;
4233         memset(p_env->api_type, 0x20, MAX_NAME_LEN);
4234         strncpy(p_env->api_type,buf, count);
4235         p_env->api_type[count-1] = 0x20;  /* we get a loose 0x0a */
4236         p_env->api_type[MAX_NAME_LEN] = 0x00;
4237         if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
4238                 p_env->read_size=DEF_PACK_BUFSIZE;
4239                 p_env->write_size=DEF_PACK_BUFSIZE;
4240                 p_env->packing=PACKING_ASK;
4241                 CLAW_DBF_TEXT(2,setup,"PACKING");
4242         }
4243         else {
4244                 p_env->packing=0;
4245                 p_env->read_size=CLAW_FRAME_SIZE;
4246                 p_env->write_size=CLAW_FRAME_SIZE;
4247                 CLAW_DBF_TEXT(2,setup,"ApiSet");
4248         }
4249         CLAW_DBF_TEXT_(2,setup,"%s",p_env->api_type);
4250         return count;
4251 }
4252
4253 static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
4254
4255 static ssize_t
4256 claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
4257 {
4258         struct claw_privbk *priv;
4259         struct claw_env * p_env;
4260
4261         priv = dev->driver_data;
4262         if (!priv)
4263                 return -ENODEV;
4264         p_env = priv->p_env;
4265         return sprintf(buf, "%d\n", p_env->write_buffers);
4266 }
4267
4268 static ssize_t
4269 claw_wbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4270 {
4271         struct claw_privbk *priv;
4272         struct claw_env *  p_env;
4273         int nnn,max;
4274
4275         priv = dev->driver_data;
4276         if (!priv)
4277                 return -ENODEV;
4278         p_env = priv->p_env;
4279         sscanf(buf, "%i", &nnn);
4280         if (p_env->packing) {
4281                 max = 64;
4282         }
4283         else {
4284                 max = 512;
4285         }
4286         if ((nnn > max ) || (nnn < 2))
4287                 return -EINVAL;
4288         p_env->write_buffers = nnn;
4289         CLAW_DBF_TEXT(2,setup,"Wbufset");
4290         CLAW_DBF_TEXT_(2,setup,"WB=%d",p_env->write_buffers);
4291         return count;
4292 }
4293
4294 static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
4295
4296 static ssize_t
4297 claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
4298 {
4299         struct claw_privbk *priv;
4300         struct claw_env *  p_env;
4301
4302         priv = dev->driver_data;
4303         if (!priv)
4304                 return -ENODEV;
4305         p_env = priv->p_env;
4306         return sprintf(buf, "%d\n", p_env->read_buffers);
4307 }
4308
4309 static ssize_t
4310 claw_rbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4311 {
4312         struct claw_privbk *priv;
4313         struct claw_env *p_env;
4314         int nnn,max;
4315
4316         priv = dev->driver_data;
4317         if (!priv)
4318                 return -ENODEV;
4319         p_env = priv->p_env;
4320         sscanf(buf, "%i", &nnn);
4321         if (p_env->packing) {
4322                 max = 64;
4323         }
4324         else {
4325                 max = 512;
4326         }
4327         if ((nnn > max ) || (nnn < 2))
4328                 return -EINVAL;
4329         p_env->read_buffers = nnn;
4330         CLAW_DBF_TEXT(2,setup,"Rbufset");
4331         CLAW_DBF_TEXT_(2,setup,"RB=%d",p_env->read_buffers);
4332         return count;
4333 }
4334
4335 static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
4336
4337 static struct attribute *claw_attr[] = {
4338         &dev_attr_read_buffer.attr,
4339         &dev_attr_write_buffer.attr,
4340         &dev_attr_adapter_name.attr,
4341         &dev_attr_api_type.attr,
4342         &dev_attr_host_name.attr,
4343         NULL,
4344 };
4345
4346 static struct attribute_group claw_attr_group = {
4347         .attrs = claw_attr,
4348 };
4349
4350 static int
4351 claw_add_files(struct device *dev)
4352 {
4353         pr_debug("%s() called\n", __FUNCTION__);
4354         CLAW_DBF_TEXT(2,setup,"add_file");
4355         return sysfs_create_group(&dev->kobj, &claw_attr_group);
4356 }
4357
4358 static void
4359 claw_remove_files(struct device *dev)
4360 {
4361         pr_debug("%s() called\n", __FUNCTION__);
4362         CLAW_DBF_TEXT(2,setup,"rem_file");
4363         sysfs_remove_group(&dev->kobj, &claw_attr_group);
4364 }
4365
4366 /*--------------------------------------------------------------------*
4367 *    claw_init  and cleanup                                           *
4368 *---------------------------------------------------------------------*/
4369
4370 static void __exit
4371 claw_cleanup(void)
4372 {
4373         unregister_cu3088_discipline(&claw_group_driver);
4374         claw_unregister_debug_facility();
4375         printk(KERN_INFO "claw: Driver unloaded\n");
4376
4377 }
4378
4379 /**
4380  * Initialize module.
4381  * This is called just after the module is loaded.
4382  *
4383  * @return 0 on success, !0 on error.
4384  */
4385 static int __init
4386 claw_init(void)
4387 {
4388         int ret = 0;
4389         printk(KERN_INFO "claw: starting driver\n");
4390
4391 #ifdef FUNCTRACE
4392         printk(KERN_INFO "claw: %s() enter \n",__FUNCTION__);
4393 #endif
4394         ret = claw_register_debug_facility();
4395         if (ret) {
4396                 printk(KERN_WARNING "claw: %s() debug_register failed %d\n",
4397                         __FUNCTION__,ret);
4398                 return ret;
4399         }
4400         CLAW_DBF_TEXT(2,setup,"init_mod");
4401         ret = register_cu3088_discipline(&claw_group_driver);
4402         if (ret) {
4403                 claw_unregister_debug_facility();
4404                 printk(KERN_WARNING "claw; %s() cu3088 register failed %d\n",
4405                         __FUNCTION__,ret);
4406         }
4407 #ifdef FUNCTRACE
4408         printk(KERN_INFO "claw: %s() exit \n",__FUNCTION__);
4409 #endif
4410         return ret;
4411 }
4412
4413 module_init(claw_init);
4414 module_exit(claw_cleanup);
4415
4416
4417
4418 /*--------------------------------------------------------------------*
4419 *    End of File                                                      *
4420 *---------------------------------------------------------------------*/
4421
4422