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  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 inline ccw_check_return_code (struct ccw_device *cdev,
 227         int return_code);
 228 static void inline ccw_check_unit_check (struct chbk * p_ch,
 229         unsigned char sense );
 230 static int find_link(struct net_device *dev, char *host_name, char *ws_name );
 231 static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
 232 static int init_ccw_bk(struct net_device *dev);
 233 static void probe_error( struct ccwgroup_device *cgdev);
 234 static struct net_device_stats *claw_stats(struct net_device *dev);
 235 static int inline pages_to_order_of_mag(int num_of_pages);
 236 static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
 237 #ifdef DEBUG
 238 static void dumpit (char *buf, int len);
 239 #endif
 240 /* sysfs Functions */
 241 static ssize_t claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf);
 242 static ssize_t claw_hname_write(struct device *dev, struct device_attribute *attr,
 243         const char *buf, size_t count);
 244 static ssize_t claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf);
 245 static ssize_t claw_adname_write(struct device *dev, struct device_attribute *attr,
 246         const char *buf, size_t count);
 247 static ssize_t claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf);
 248 static ssize_t claw_apname_write(struct device *dev, struct device_attribute *attr,
 249         const char *buf, size_t count);
 250 static ssize_t claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
 251 static ssize_t claw_wbuff_write(struct device *dev, struct device_attribute *attr,
 252         const char *buf, size_t count);
 253 static ssize_t claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
 254 static ssize_t claw_rbuff_write(struct device *dev, struct device_attribute *attr,
 255         const char *buf, size_t count);
 256 static int claw_add_files(struct device *dev);
 257 static void claw_remove_files(struct device *dev);
 258
 259 /*   Functions for System Validate  */
 260 static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
 261 static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
 262        __u8 correlator, __u8 rc , char *local_name, char *remote_name);
 263 static int claw_snd_conn_req(struct net_device *dev, __u8 link);
 264 static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
 265 static int claw_snd_sys_validate_rsp(struct net_device *dev,
 266         struct clawctl * p_ctl, __u32 return_code);
 267 static int claw_strt_conn_req(struct net_device *dev );
 268 static void claw_strt_read ( struct net_device *dev, int lock );
 269 static void claw_strt_out_IO( struct net_device *dev );
 270 static void claw_free_wrt_buf( struct net_device *dev );
 271
 272 /* Functions for unpack reads   */
 273 static void unpack_read (struct net_device *dev );
 274
 275 /* ccwgroup table  */
 276
 277 static struct ccwgroup_driver claw_group_driver = {
 278         .owner       = THIS_MODULE,
 279         .name        = "claw",
 280         .max_slaves  = 2,
 281         .driver_id   = 0xC3D3C1E6,
 282         .probe       = claw_probe,
 283         .remove      = claw_remove_device,
 284         .set_online  = claw_new_device,
 285         .set_offline = claw_shutdown_device,
 286 };
 287
 288 /*
 289 *
 290 *       Key functions
 291 */
 292
 293 /*----------------------------------------------------------------*
 294  *   claw_probe                                                   *
 295  *      this function is called for each CLAW device.             *
 296  *----------------------------------------------------------------*/
 297 static int
 298 claw_probe(struct ccwgroup_device *cgdev)
 299 {
 300         int             rc;
 301         struct claw_privbk *privptr=NULL;
 302
 303 #ifdef FUNCTRACE
 304         printk(KERN_INFO "%s Enter\n",__FUNCTION__);
 305 #endif
 306         CLAW_DBF_TEXT(2,setup,"probe");
 307         if (!get_device(&cgdev->dev))
 308                 return -ENODEV;
 309 #ifdef DEBUGMSG
 310         printk(KERN_INFO "claw: variable cgdev =\n");
 311         dumpit((char *)cgdev, sizeof(struct ccwgroup_device));
 312 #endif
 313         privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL);
 314         if (privptr == NULL) {
 315                 probe_error(cgdev);
 316                 put_device(&cgdev->dev);
 317                 printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
 318                         cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
 319                 CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
 320                 return -ENOMEM;
 321         }
 322         privptr->p_mtc_envelope= kmalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
 323         privptr->p_env = kmalloc(sizeof(struct claw_env), GFP_KERNEL);
 324         if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
 325                 probe_error(cgdev);
 326                 put_device(&cgdev->dev);
 327                 printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
 328                         cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
 329                 CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
 330                 return -ENOMEM;
 331         }
 332         memset(privptr->p_mtc_envelope, 0x00, MAX_ENVELOPE_SIZE);
 333         memset(privptr->p_env, 0x00, sizeof(struct claw_env));
 334         memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
 335         memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
 336         memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
 337         privptr->p_env->packing = 0;
 338         privptr->p_env->write_buffers = 5;
 339         privptr->p_env->read_buffers = 5;
 340         privptr->p_env->read_size = CLAW_FRAME_SIZE;
 341         privptr->p_env->write_size = CLAW_FRAME_SIZE;
 342         rc = claw_add_files(&cgdev->dev);
 343         if (rc) {
 344                 probe_error(cgdev);
 345                 put_device(&cgdev->dev);
 346                 printk(KERN_WARNING "add_files failed %s %s Exit Line %d \n",
 347                         cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
 348                 CLAW_DBF_TEXT_(2,setup,"probex%d",rc);
 349                 return rc;
 350         }
 351         printk(KERN_INFO "claw: sysfs files added for %s\n",cgdev->cdev[0]->dev.bus_id);
 352         privptr->p_env->p_priv = privptr;
 353         cgdev->cdev[0]->handler = claw_irq_handler;
 354         cgdev->cdev[1]->handler = claw_irq_handler;
 355         cgdev->dev.driver_data = privptr;
 356 #ifdef FUNCTRACE
 357         printk(KERN_INFO "claw:%s exit on line %d, "
 358                 "rc = 0\n",__FUNCTION__,__LINE__);
 359 #endif
 360         CLAW_DBF_TEXT(2,setup,"prbext 0");
 361
 362         return 0;
 363 }  /*  end of claw_probe       */
 364
 365 /*-------------------------------------------------------------------*
 366  *   claw_tx                                                         *
 367  *-------------------------------------------------------------------*/
 368
 369 static int
 370 claw_tx(struct sk_buff *skb, struct net_device *dev)
 371 {
 372         int             rc;
 373         struct claw_privbk *privptr=dev->priv;
 374         unsigned long saveflags;
 375         struct chbk *p_ch;
 376
 377 #ifdef FUNCTRACE
 378         printk(KERN_INFO "%s:%s enter\n",dev->name,__FUNCTION__);
 379 #endif
 380         CLAW_DBF_TEXT(4,trace,"claw_tx");
 381         p_ch=&privptr->channel[WRITE];
 382         if (skb == NULL) {
 383                 printk(KERN_WARNING "%s: null pointer passed as sk_buffer\n",
 384                         dev->name);
 385                 privptr->stats.tx_dropped++;
 386 #ifdef FUNCTRACE
 387                 printk(KERN_INFO "%s: %s() exit on line %d, rc = EIO\n",
 388                         dev->name,__FUNCTION__, __LINE__);
 389 #endif
 390                 CLAW_DBF_TEXT_(2,trace,"clawtx%d",-EIO);
 391                 return -EIO;
 392         }
 393
 394 #ifdef IOTRACE
 395         printk(KERN_INFO "%s: variable sk_buff=\n",dev->name);
 396         dumpit((char *) skb, sizeof(struct sk_buff));
 397         printk(KERN_INFO "%s: variable dev=\n",dev->name);
 398         dumpit((char *) dev, sizeof(struct net_device));
 399 #endif
 400         spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
 401         rc=claw_hw_tx( skb, dev, 1 );
 402         spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
 403 #ifdef FUNCTRACE
 404         printk(KERN_INFO "%s:%s exit on line %d, rc = %d\n",
 405                 dev->name, __FUNCTION__, __LINE__, rc);
 406 #endif
 407         CLAW_DBF_TEXT_(4,trace,"clawtx%d",rc);
 408         return rc;
 409 }   /*  end of claw_tx */
 410
 411 /*------------------------------------------------------------------*
 412  *  pack the collect queue into an skb and return it                *
 413  *   If not packing just return the top skb from the queue          *
 414  *------------------------------------------------------------------*/
 415
 416 static struct sk_buff *
 417 claw_pack_skb(struct claw_privbk *privptr)
 418 {
 419         struct sk_buff *new_skb,*held_skb;
 420         struct chbk *p_ch = &privptr->channel[WRITE];
 421         struct claw_env  *p_env = privptr->p_env;
 422         int     pkt_cnt,pk_ind,so_far;
 423
 424         new_skb = NULL;         /* assume no dice */
 425         pkt_cnt = 0;
 426         CLAW_DBF_TEXT(4,trace,"PackSKBe");
 427         if (!skb_queue_empty(&p_ch->collect_queue)) {
 428         /* some data */
 429                 held_skb = skb_dequeue(&p_ch->collect_queue);
 430                 if (held_skb)
 431                         dev_kfree_skb_any(held_skb);
 432                 else
 433                         return NULL;
 434                 if (p_env->packing != DO_PACKED)
 435                         return held_skb;
 436                 /* get a new SKB we will pack at least one */
 437                 new_skb = dev_alloc_skb(p_env->write_size);
 438                 if (new_skb == NULL) {
 439                         atomic_inc(&held_skb->users);
 440                         skb_queue_head(&p_ch->collect_queue,held_skb);
 441                         return NULL;
 442                 }
 443                 /* we have packed packet and a place to put it  */
 444                 pk_ind = 1;
 445                 so_far = 0;
 446                 new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
 447                 while ((pk_ind) && (held_skb != NULL)) {
 448                         if (held_skb->len+so_far <= p_env->write_size-8) {
 449                                 memcpy(skb_put(new_skb,held_skb->len),
 450                                         held_skb->data,held_skb->len);
 451                                 privptr->stats.tx_packets++;
 452                                 so_far += held_skb->len;
 453                                 pkt_cnt++;
 454                                 dev_kfree_skb_any(held_skb);
 455                                 held_skb = skb_dequeue(&p_ch->collect_queue);
 456                                 if (held_skb)
 457                                         atomic_dec(&held_skb->users);
 458                         } else {
 459                                 pk_ind = 0;
 460                                 atomic_inc(&held_skb->users);
 461                                 skb_queue_head(&p_ch->collect_queue,held_skb);
 462                         }
 463                 }
 464 #ifdef IOTRACE
 465                 printk(KERN_INFO "%s: %s() Packed %d len %d\n",
 466                         p_env->ndev->name,
 467                         __FUNCTION__,pkt_cnt,new_skb->len);
 468 #endif
 469         }
 470         CLAW_DBF_TEXT(4,trace,"PackSKBx");
 471         return new_skb;
 472 }
 473
 474 /*-------------------------------------------------------------------*
 475  *   claw_change_mtu                                                 *
 476  *                                                                   *
 477  *-------------------------------------------------------------------*/
 478
 479 static int
 480 claw_change_mtu(struct net_device *dev, int new_mtu)
 481 {
 482         struct claw_privbk  *privptr=dev->priv;
 483         int buff_size;
 484 #ifdef FUNCTRACE
 485         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
 486 #endif
 487 #ifdef DEBUGMSG
 488         printk(KERN_INFO "variable dev =\n");
 489         dumpit((char *) dev, sizeof(struct net_device));
 490         printk(KERN_INFO "variable new_mtu = %d\n", new_mtu);
 491 #endif
 492         CLAW_DBF_TEXT(4,trace,"setmtu");
 493         buff_size = privptr->p_env->write_size;
 494         if ((new_mtu < 60) || (new_mtu > buff_size)) {
 495 #ifdef FUNCTRACE
 496                 printk(KERN_INFO "%s:%s Exit on line %d, rc=EINVAL\n",
 497                 dev->name,
 498                 __FUNCTION__, __LINE__);
 499 #endif
 500                 return -EINVAL;
 501         }
 502         dev->mtu = new_mtu;
 503 #ifdef FUNCTRACE
 504         printk(KERN_INFO "%s:%s Exit on line %d\n",dev->name,
 505         __FUNCTION__, __LINE__);
 506 #endif
 507         return 0;
 508 }  /*   end of claw_change_mtu */
 509
 510
 511 /*-------------------------------------------------------------------*
 512  *   claw_open                                                       *
 513  *                                                                   *
 514  *-------------------------------------------------------------------*/
 515 static int
 516 claw_open(struct net_device *dev)
 517 {
 518
 519         int     rc;
 520         int     i;
 521         unsigned long       saveflags=0;
 522         unsigned long       parm;
 523         struct claw_privbk  *privptr;
 524         DECLARE_WAITQUEUE(wait, current);
 525         struct timer_list  timer;
 526         struct ccwbk *p_buf;
 527
 528 #ifdef FUNCTRACE
 529         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
 530 #endif
 531         CLAW_DBF_TEXT(4,trace,"open");
 532         if (!dev | (dev->name[0] == 0x00)) {
 533                 CLAW_DBF_TEXT(2,trace,"BadDev");
 534                 printk(KERN_WARNING "claw: Bad device at open failing \n");
 535                 return -ENODEV;
 536         }
 537         privptr = (struct claw_privbk *)dev->priv;
 538         /*   allocate and initialize CCW blocks */
 539         if (privptr->buffs_alloc == 0) {
 540                 rc=init_ccw_bk(dev);
 541                 if (rc) {
 542                         printk(KERN_INFO "%s:%s Exit on line %d, rc=ENOMEM\n",
 543                         dev->name,
 544                         __FUNCTION__, __LINE__);
 545                         CLAW_DBF_TEXT(2,trace,"openmem");
 546                         return -ENOMEM;
 547                 }
 548         }
 549         privptr->system_validate_comp=0;
 550         privptr->release_pend=0;
 551         if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
 552                 privptr->p_env->read_size=DEF_PACK_BUFSIZE;
 553                 privptr->p_env->write_size=DEF_PACK_BUFSIZE;
 554                 privptr->p_env->packing=PACKING_ASK;
 555         } else {
 556                 privptr->p_env->packing=0;
 557                 privptr->p_env->read_size=CLAW_FRAME_SIZE;
 558                 privptr->p_env->write_size=CLAW_FRAME_SIZE;
 559         }
 560         claw_set_busy(dev);
 561         tasklet_init(&privptr->channel[READ].tasklet, claw_irq_tasklet,
 562                 (unsigned long) &privptr->channel[READ]);
 563         for ( i = 0; i < 2;  i++) {
 564                 CLAW_DBF_TEXT_(2,trace,"opn_ch%d",i);
 565                 init_waitqueue_head(&privptr->channel[i].wait);
 566                 /* skb_queue_head_init(&p_ch->io_queue); */
 567                 if (i == WRITE)
 568                         skb_queue_head_init(
 569                                 &privptr->channel[WRITE].collect_queue);
 570                 privptr->channel[i].flag_a = 0;
 571                 privptr->channel[i].IO_active = 0;
 572                 privptr->channel[i].flag  &= ~CLAW_TIMER;
 573                 init_timer(&timer);
 574                 timer.function = (void *)claw_timer;
 575                 timer.data = (unsigned long)(&privptr->channel[i]);
 576                 timer.expires = jiffies + 15*HZ;
 577                 add_timer(&timer);
 578                 spin_lock_irqsave(get_ccwdev_lock(
 579                         privptr->channel[i].cdev), saveflags);
 580                 parm = (unsigned long) &privptr->channel[i];
 581                 privptr->channel[i].claw_state = CLAW_START_HALT_IO;
 582                 rc = 0;
 583                 add_wait_queue(&privptr->channel[i].wait, &wait);
 584                 rc = ccw_device_halt(
 585                         (struct ccw_device *)privptr->channel[i].cdev,parm);
 586                 set_current_state(TASK_INTERRUPTIBLE);
 587                 spin_unlock_irqrestore(
 588                         get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
 589                 schedule();
 590                 set_current_state(TASK_RUNNING);
 591                 remove_wait_queue(&privptr->channel[i].wait, &wait);
 592                 if(rc != 0)
 593                         ccw_check_return_code(privptr->channel[i].cdev, rc);
 594                 if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
 595                         del_timer(&timer);
 596         }
 597         if ((((privptr->channel[READ].last_dstat |
 598                 privptr->channel[WRITE].last_dstat) &
 599            ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
 600            (((privptr->channel[READ].flag |
 601                 privptr->channel[WRITE].flag) & CLAW_TIMER) != 0x00)) {
 602 #ifdef DEBUGMSG
 603                 printk(KERN_INFO "%s: channel problems during open - read:"
 604                         " %02x -  write: %02x\n",
 605                         dev->name,
 606                         privptr->channel[READ].last_dstat,
 607                         privptr->channel[WRITE].last_dstat);
 608 #endif
 609                 printk(KERN_INFO "%s: remote side is not ready\n", dev->name);
 610                 CLAW_DBF_TEXT(2,trace,"notrdy");
 611
 612                 for ( i = 0; i < 2;  i++) {
 613                         spin_lock_irqsave(
 614                                 get_ccwdev_lock(privptr->channel[i].cdev),
 615                                 saveflags);
 616                         parm = (unsigned long) &privptr->channel[i];
 617                         privptr->channel[i].claw_state = CLAW_STOP;
 618                         rc = ccw_device_halt(
 619                                 (struct ccw_device *)&privptr->channel[i].cdev,
 620                                 parm);
 621                         spin_unlock_irqrestore(
 622                                 get_ccwdev_lock(privptr->channel[i].cdev),
 623                                 saveflags);
 624                         if (rc != 0) {
 625                                 ccw_check_return_code(
 626                                         privptr->channel[i].cdev, rc);
 627                         }
 628                 }
 629                 free_pages((unsigned long)privptr->p_buff_ccw,
 630                         (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
 631                 if (privptr->p_env->read_size < PAGE_SIZE) {
 632                         free_pages((unsigned long)privptr->p_buff_read,
 633                                (int)pages_to_order_of_mag(
 634                                         privptr->p_buff_read_num));
 635                 }
 636                 else {
 637                         p_buf=privptr->p_read_active_first;
 638                         while (p_buf!=NULL) {
 639                                 free_pages((unsigned long)p_buf->p_buffer,
 640                                       (int)pages_to_order_of_mag(
 641                                         privptr->p_buff_pages_perread ));
 642                                 p_buf=p_buf->next;
 643                         }
 644                 }
 645                 if (privptr->p_env->write_size < PAGE_SIZE ) {
 646                         free_pages((unsigned long)privptr->p_buff_write,
 647                              (int)pages_to_order_of_mag(
 648                                 privptr->p_buff_write_num));
 649                 }
 650                 else {
 651                         p_buf=privptr->p_write_active_first;
 652                         while (p_buf!=NULL) {
 653                                 free_pages((unsigned long)p_buf->p_buffer,
 654                                      (int)pages_to_order_of_mag(
 655                                         privptr->p_buff_pages_perwrite ));
 656                                 p_buf=p_buf->next;
 657                         }
 658                 }
 659                 privptr->buffs_alloc = 0;
 660                 privptr->channel[READ].flag= 0x00;
 661                 privptr->channel[WRITE].flag = 0x00;
 662                 privptr->p_buff_ccw=NULL;
 663                 privptr->p_buff_read=NULL;
 664                 privptr->p_buff_write=NULL;
 665                 claw_clear_busy(dev);
 666 #ifdef FUNCTRACE
 667                 printk(KERN_INFO "%s:%s Exit on line %d, rc=EIO\n",
 668                 dev->name,__FUNCTION__,__LINE__);
 669 #endif
 670                 CLAW_DBF_TEXT(2,trace,"open EIO");
 671                 return -EIO;
 672         }
 673
 674         /*   Send SystemValidate command */
 675
 676         claw_clear_busy(dev);
 677
 678 #ifdef FUNCTRACE
 679         printk(KERN_INFO "%s:%s Exit on line %d, rc=0\n",
 680                 dev->name,__FUNCTION__,__LINE__);
 681 #endif
 682         CLAW_DBF_TEXT(4,trace,"openok");
 683         return 0;
 684 }    /*     end of claw_open    */
 685
 686 /*-------------------------------------------------------------------*
 687 *                                                                    *
 688 *       claw_irq_handler                                             *
 689 *                                                                    *
 690 *--------------------------------------------------------------------*/
 691 static void
 692 claw_irq_handler(struct ccw_device *cdev,
 693         unsigned long intparm, struct irb *irb)
 694 {
 695         struct chbk *p_ch = NULL;
 696         struct claw_privbk *privptr = NULL;
 697         struct net_device *dev = NULL;
 698         struct claw_env  *p_env;
 699         struct chbk *p_ch_r=NULL;
 700
 701
 702 #ifdef FUNCTRACE
 703         printk(KERN_INFO "%s enter  \n",__FUNCTION__);
 704 #endif
 705         CLAW_DBF_TEXT(4,trace,"clawirq");
 706         /* Bypass all 'unsolicited interrupts' */
 707         if (!cdev->dev.driver_data) {
 708                 printk(KERN_WARNING "claw: unsolicited interrupt for device:"
 709                         "%s received c-%02x d-%02x\n",
 710                         cdev->dev.bus_id,irb->scsw.cstat, irb->scsw.dstat);
 711 #ifdef FUNCTRACE
 712                 printk(KERN_INFO "claw: %s() "
 713                         "exit on line %d\n",__FUNCTION__,__LINE__);
 714 #endif
 715                 CLAW_DBF_TEXT(2,trace,"badirq");
 716                 return;
 717         }
 718         privptr = (struct claw_privbk *)cdev->dev.driver_data;
 719
 720         /* Try to extract channel from driver data. */
 721         if (privptr->channel[READ].cdev == cdev)
 722                 p_ch = &privptr->channel[READ];
 723         else if (privptr->channel[WRITE].cdev == cdev)
 724                 p_ch = &privptr->channel[WRITE];
 725         else {
 726                 printk(KERN_WARNING "claw: Can't determine channel for "
 727                         "interrupt, device %s\n", cdev->dev.bus_id);
 728                 CLAW_DBF_TEXT(2,trace,"badchan");
 729                 return;
 730         }
 731         CLAW_DBF_TEXT_(4,trace,"IRQCH=%d",p_ch->flag);
 732
 733         dev = (struct net_device *) (p_ch->ndev);
 734         p_env=privptr->p_env;
 735
 736 #ifdef IOTRACE
 737         printk(KERN_INFO "%s: interrupt for device: %04x "
 738                 "received c-%02x d-%02x state-%02x\n",
 739                 dev->name, p_ch->devno, irb->scsw.cstat,
 740                 irb->scsw.dstat, p_ch->claw_state);
 741 #endif
 742
 743         /* Copy interruption response block. */
 744         memcpy(p_ch->irb, irb, sizeof(struct irb));
 745
 746         /* Check for good subchannel return code, otherwise error message */
 747         if (irb->scsw.cstat  &&  !(irb->scsw.cstat & SCHN_STAT_PCI)) {
 748                 printk(KERN_INFO "%s: subchannel check for device: %04x -"
 749                         " Sch Stat %02x  Dev Stat %02x CPA - %04x\n",
 750                         dev->name, p_ch->devno,
 751                         irb->scsw.cstat, irb->scsw.dstat,irb->scsw.cpa);
 752 #ifdef IOTRACE
 753                 dumpit((char *)irb,sizeof(struct irb));
 754                 dumpit((char *)(unsigned long)irb->scsw.cpa,
 755                         sizeof(struct ccw1));
 756 #endif
 757 #ifdef FUNCTRACE
 758                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 759                 dev->name,__FUNCTION__,__LINE__);
 760 #endif
 761                 CLAW_DBF_TEXT(2,trace,"chanchk");
 762                 /* return; */
 763         }
 764
 765         /* Check the reason-code of a unit check */
 766         if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
 767                 ccw_check_unit_check(p_ch, irb->ecw[0]);
 768         }
 769
 770         /* State machine to bring the connection up, down and to restart */
 771         p_ch->last_dstat = irb->scsw.dstat;
 772
 773         switch (p_ch->claw_state) {
 774                 case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
 775 #ifdef DEBUGMSG
 776                         printk(KERN_INFO "%s: CLAW_STOP enter\n", dev->name);
 777 #endif
 778                         if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
 779                         (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
 780                         (p_ch->irb->scsw.stctl ==
 781                         (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
 782 #ifdef FUNCTRACE
 783                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 784                                         dev->name,__FUNCTION__,__LINE__);
 785 #endif
 786                                 return;
 787                         }
 788                         wake_up(&p_ch->wait);   /* wake up claw_release */
 789
 790 #ifdef DEBUGMSG
 791                         printk(KERN_INFO "%s: CLAW_STOP exit\n", dev->name);
 792 #endif
 793 #ifdef FUNCTRACE
 794                         printk(KERN_INFO "%s:%s Exit on line %d\n",
 795                                 dev->name,__FUNCTION__,__LINE__);
 796 #endif
 797                         CLAW_DBF_TEXT(4,trace,"stop");
 798                         return;
 799
 800                 case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open  */
 801 #ifdef DEBUGMSG
 802                         printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO\n",
 803                                 dev->name);
 804 #endif
 805                         if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
 806                         (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
 807                         (p_ch->irb->scsw.stctl ==
 808                         (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
 809 #ifdef FUNCTRACE
 810                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 811                                         dev->name,__FUNCTION__,__LINE__);
 812 #endif
 813                                 CLAW_DBF_TEXT(4,trace,"haltio");
 814                                 return;
 815                         }
 816                         if (p_ch->flag == CLAW_READ) {
 817                                 p_ch->claw_state = CLAW_START_READ;
 818                                 wake_up(&p_ch->wait); /* wake claw_open (READ)*/
 819                         }
 820                         else
 821                            if (p_ch->flag == CLAW_WRITE) {
 822                                 p_ch->claw_state = CLAW_START_WRITE;
 823                                 /*      send SYSTEM_VALIDATE                    */
 824                                 claw_strt_read(dev, LOCK_NO);
 825                                 claw_send_control(dev,
 826                                         SYSTEM_VALIDATE_REQUEST,
 827                                         0, 0, 0,
 828                                         p_env->host_name,
 829                                         p_env->adapter_name );
 830                         } else {
 831                                 printk(KERN_WARNING "claw: unsolicited "
 832                                         "interrupt for device:"
 833                                         "%s received c-%02x d-%02x\n",
 834                                         cdev->dev.bus_id,
 835                                         irb->scsw.cstat,
 836                                         irb->scsw.dstat);
 837                                 return;
 838                                 }
 839 #ifdef DEBUGMSG
 840                         printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO exit\n",
 841                                 dev->name);
 842 #endif
 843 #ifdef FUNCTRACE
 844                         printk(KERN_INFO "%s:%s Exit on line %d\n",
 845                                 dev->name,__FUNCTION__,__LINE__);
 846 #endif
 847                         CLAW_DBF_TEXT(4,trace,"haltio");
 848                         return;
 849                 case CLAW_START_READ:
 850                         CLAW_DBF_TEXT(4,trace,"ReadIRQ");
 851                         if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
 852                                 clear_bit(0, (void *)&p_ch->IO_active);
 853                                 if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
 854                                     (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
 855                                     (p_ch->irb->ecw[0])        == 0)
 856                                 {
 857                                         privptr->stats.rx_errors++;
 858                                         printk(KERN_INFO "%s: Restart is "
 859                                                 "required after remote "
 860                                                 "side recovers \n",
 861                                                 dev->name);
 862                                 }
 863 #ifdef FUNCTRACE
 864                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 865                                         dev->name,__FUNCTION__,__LINE__);
 866 #endif
 867                                         CLAW_DBF_TEXT(4,trace,"notrdy");
 868                                         return;
 869                         }
 870                         if ((p_ch->irb->scsw.cstat & SCHN_STAT_PCI) &&
 871                             (p_ch->irb->scsw.dstat==0)) {
 872                                 if (test_and_set_bit(CLAW_BH_ACTIVE,
 873                                         (void *)&p_ch->flag_a) == 0) {
 874                                         tasklet_schedule(&p_ch->tasklet);
 875                                 }
 876                                 else {
 877                                         CLAW_DBF_TEXT(4,trace,"PCINoBH");
 878                                 }
 879 #ifdef FUNCTRACE
 880                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 881                                         dev->name,__FUNCTION__,__LINE__);
 882 #endif
 883                                 CLAW_DBF_TEXT(4,trace,"PCI_read");
 884                                 return;
 885                         }
 886                         if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
 887                          (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
 888                          (p_ch->irb->scsw.stctl ==
 889                          (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
 890 #ifdef FUNCTRACE
 891                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 892                                         dev->name,__FUNCTION__,__LINE__);
 893 #endif
 894                                 CLAW_DBF_TEXT(4,trace,"SPend_rd");
 895                                 return;
 896                         }
 897                         clear_bit(0, (void *)&p_ch->IO_active);
 898                         claw_clearbit_busy(TB_RETRY,dev);
 899                         if (test_and_set_bit(CLAW_BH_ACTIVE,
 900                                 (void *)&p_ch->flag_a) == 0) {
 901                                 tasklet_schedule(&p_ch->tasklet);
 902                          }
 903                         else {
 904                                 CLAW_DBF_TEXT(4,trace,"RdBHAct");
 905                         }
 906
 907 #ifdef DEBUGMSG
 908                         printk(KERN_INFO "%s: process CLAW_START_READ exit\n",
 909                                 dev->name);
 910 #endif
 911 #ifdef FUNCTRACE
 912                         printk(KERN_INFO "%s:%s Exit on line %d\n",
 913                                 dev->name,__FUNCTION__,__LINE__);
 914 #endif
 915                         CLAW_DBF_TEXT(4,trace,"RdIRQXit");
 916                         return;
 917                 case CLAW_START_WRITE:
 918                         if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
 919                                 printk(KERN_INFO "%s: Unit Check Occured in "
 920                                         "write channel\n",dev->name);
 921                                 clear_bit(0, (void *)&p_ch->IO_active);
 922                                 if (p_ch->irb->ecw[0] & 0x80 ) {
 923                                         printk(KERN_INFO "%s: Resetting Event "
 924                                                 "occurred:\n",dev->name);
 925                                         init_timer(&p_ch->timer);
 926                                         p_ch->timer.function =
 927                                                 (void *)claw_write_retry;
 928                                         p_ch->timer.data = (unsigned long)p_ch;
 929                                         p_ch->timer.expires = jiffies + 10*HZ;
 930                                         add_timer(&p_ch->timer);
 931                                         printk(KERN_INFO "%s: write connection "
 932                                                 "restarting\n",dev->name);
 933                                 }
 934 #ifdef FUNCTRACE
 935                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 936                                         dev->name,__FUNCTION__,__LINE__);
 937 #endif
 938                                 CLAW_DBF_TEXT(4,trace,"rstrtwrt");
 939                                 return;
 940                         }
 941                         if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) {
 942                                         clear_bit(0, (void *)&p_ch->IO_active);
 943                                         printk(KERN_INFO "%s: Unit Exception "
 944                                                 "Occured in write channel\n",
 945                                                 dev->name);
 946                         }
 947                         if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
 948                         (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
 949                         (p_ch->irb->scsw.stctl ==
 950                         (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
 951 #ifdef FUNCTRACE
 952                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 953                                         dev->name,__FUNCTION__,__LINE__);
 954 #endif
 955                                 CLAW_DBF_TEXT(4,trace,"writeUE");
 956                                 return;
 957                         }
 958                         clear_bit(0, (void *)&p_ch->IO_active);
 959                         if (claw_test_and_setbit_busy(TB_TX,dev)==0) {
 960                                 claw_write_next(p_ch);
 961                                 claw_clearbit_busy(TB_TX,dev);
 962                                 claw_clear_busy(dev);
 963                         }
 964                         p_ch_r=(struct chbk *)&privptr->channel[READ];
 965                         if (test_and_set_bit(CLAW_BH_ACTIVE,
 966                                         (void *)&p_ch_r->flag_a) == 0) {
 967                                 tasklet_schedule(&p_ch_r->tasklet);
 968                         }
 969
 970 #ifdef DEBUGMSG
 971                         printk(KERN_INFO "%s: process CLAW_START_WRITE exit\n",
 972                                  dev->name);
 973 #endif
 974 #ifdef FUNCTRACE
 975                         printk(KERN_INFO "%s:%s Exit on line %d\n",
 976                                 dev->name,__FUNCTION__,__LINE__);
 977 #endif
 978                         CLAW_DBF_TEXT(4,trace,"StWtExit");
 979                         return;
 980                 default:
 981                         printk(KERN_WARNING "%s: wrong selection code - irq "
 982                                 "state=%d\n",dev->name,p_ch->claw_state);
 983 #ifdef FUNCTRACE
 984                         printk(KERN_INFO "%s:%s Exit on line %d\n",
 985                                 dev->name,__FUNCTION__,__LINE__);
 986 #endif
 987                         CLAW_DBF_TEXT(2,trace,"badIRQ");
 988                         return;
 989         }
 990
 991 }       /*   end of claw_irq_handler    */
 992
 993
 994 /*-------------------------------------------------------------------*
 995 *       claw_irq_tasklet                                             *
 996 *                                                                    *
 997 *--------------------------------------------------------------------*/
 998 static void
 999 claw_irq_tasklet ( unsigned long data )
1000 {
1001         struct chbk * p_ch;
1002         struct net_device  *dev;
1003         struct claw_privbk *       privptr;
1004
1005         p_ch = (struct chbk *) data;
1006         dev = (struct net_device *)p_ch->ndev;
1007 #ifdef FUNCTRACE
1008         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
1009 #endif
1010 #ifdef DEBUGMSG
1011         printk(KERN_INFO "%s: variable p_ch =\n",dev->name);
1012         dumpit((char *) p_ch, sizeof(struct chbk));
1013 #endif
1014         CLAW_DBF_TEXT(4,trace,"IRQtask");
1015
1016         privptr = (struct claw_privbk *) dev->priv;
1017
1018 #ifdef DEBUGMSG
1019         printk(KERN_INFO "%s: bh routine - state-%02x\n" ,
1020                 dev->name, p_ch->claw_state);
1021 #endif
1022
1023         unpack_read(dev);
1024         clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
1025         CLAW_DBF_TEXT(4,trace,"TskletXt");
1026 #ifdef FUNCTRACE
1027         printk(KERN_INFO "%s:%s Exit on line %d\n",
1028                 dev->name,__FUNCTION__,__LINE__);
1029 #endif
1030         return;
1031 }       /*    end of claw_irq_bh    */
1032
1033 /*-------------------------------------------------------------------*
1034 *       claw_release                                                 *
1035 *                                                                    *
1036 *--------------------------------------------------------------------*/
1037 static int
1038 claw_release(struct net_device *dev)
1039 {
1040         int                rc;
1041         int                i;
1042         unsigned long      saveflags;
1043         unsigned long      parm;
1044         struct claw_privbk *privptr;
1045         DECLARE_WAITQUEUE(wait, current);
1046         struct ccwbk*             p_this_ccw;
1047         struct ccwbk*             p_buf;
1048
1049         if (!dev)
1050                 return 0;
1051         privptr = (struct claw_privbk *) dev->priv;
1052         if (!privptr)
1053                 return 0;
1054 #ifdef FUNCTRACE
1055         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
1056 #endif
1057         CLAW_DBF_TEXT(4,trace,"release");
1058 #ifdef DEBUGMSG
1059         printk(KERN_INFO "%s: variable dev =\n",dev->name);
1060         dumpit((char *) dev, sizeof(struct net_device));
1061         printk(KERN_INFO "Priv Buffalloc %d\n",privptr->buffs_alloc);
1062         printk(KERN_INFO "Priv p_buff_ccw = %p\n",&privptr->p_buff_ccw);
1063 #endif
1064         privptr->release_pend=1;
1065         claw_setbit_busy(TB_STOP,dev);
1066         for ( i = 1; i >=0 ;  i--) {
1067                 spin_lock_irqsave(
1068                         get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
1069              /*   del_timer(&privptr->channel[READ].timer);  */
1070                 privptr->channel[i].claw_state = CLAW_STOP;
1071                 privptr->channel[i].IO_active = 0;
1072                 parm = (unsigned long) &privptr->channel[i];
1073                 if (i == WRITE)
1074                         claw_purge_skb_queue(
1075                                 &privptr->channel[WRITE].collect_queue);
1076                 rc = ccw_device_halt (privptr->channel[i].cdev, parm);
1077                 if (privptr->system_validate_comp==0x00)  /* never opened? */
1078                    init_waitqueue_head(&privptr->channel[i].wait);
1079                 add_wait_queue(&privptr->channel[i].wait, &wait);
1080                 set_current_state(TASK_INTERRUPTIBLE);
1081                 spin_unlock_irqrestore(
1082                         get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
1083                 schedule();
1084                 set_current_state(TASK_RUNNING);
1085                 remove_wait_queue(&privptr->channel[i].wait, &wait);
1086                 if (rc != 0) {
1087                         ccw_check_return_code(privptr->channel[i].cdev, rc);
1088                 }
1089         }
1090         if (privptr->pk_skb != NULL) {
1091                 dev_kfree_skb_any(privptr->pk_skb);
1092                 privptr->pk_skb = NULL;
1093         }
1094         if(privptr->buffs_alloc != 1) {
1095 #ifdef FUNCTRACE
1096         printk(KERN_INFO "%s:%s Exit on line %d\n",
1097                 dev->name,__FUNCTION__,__LINE__);
1098 #endif
1099                 CLAW_DBF_TEXT(4,trace,"none2fre");
1100                 return 0;
1101         }
1102         CLAW_DBF_TEXT(4,trace,"freebufs");
1103         if (privptr->p_buff_ccw != NULL) {
1104                 free_pages((unsigned long)privptr->p_buff_ccw,
1105                         (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
1106         }
1107         CLAW_DBF_TEXT(4,trace,"freeread");
1108         if (privptr->p_env->read_size < PAGE_SIZE) {
1109             if (privptr->p_buff_read != NULL) {
1110                 free_pages((unsigned long)privptr->p_buff_read,
1111                       (int)pages_to_order_of_mag(privptr->p_buff_read_num));
1112                 }
1113         }
1114         else {
1115                 p_buf=privptr->p_read_active_first;
1116                 while (p_buf!=NULL) {
1117                         free_pages((unsigned long)p_buf->p_buffer,
1118                              (int)pages_to_order_of_mag(
1119                                 privptr->p_buff_pages_perread ));
1120                         p_buf=p_buf->next;
1121                 }
1122         }
1123          CLAW_DBF_TEXT(4,trace,"freewrit");
1124         if (privptr->p_env->write_size < PAGE_SIZE ) {
1125                 free_pages((unsigned long)privptr->p_buff_write,
1126                       (int)pages_to_order_of_mag(privptr->p_buff_write_num));
1127         }
1128         else {
1129                 p_buf=privptr->p_write_active_first;
1130                 while (p_buf!=NULL) {
1131                         free_pages((unsigned long)p_buf->p_buffer,
1132                               (int)pages_to_order_of_mag(
1133                               privptr->p_buff_pages_perwrite ));
1134                         p_buf=p_buf->next;
1135                 }
1136         }
1137          CLAW_DBF_TEXT(4,trace,"clearptr");
1138         privptr->buffs_alloc = 0;
1139         privptr->p_buff_ccw=NULL;
1140         privptr->p_buff_read=NULL;
1141         privptr->p_buff_write=NULL;
1142         privptr->system_validate_comp=0;
1143         privptr->release_pend=0;
1144         /*      Remove any writes that were pending and reset all reads   */
1145         p_this_ccw=privptr->p_read_active_first;
1146         while (p_this_ccw!=NULL) {
1147                 p_this_ccw->header.length=0xffff;
1148                 p_this_ccw->header.opcode=0xff;
1149                 p_this_ccw->header.flag=0x00;
1150                 p_this_ccw=p_this_ccw->next;
1151         }
1152
1153         while (privptr->p_write_active_first!=NULL) {
1154                 p_this_ccw=privptr->p_write_active_first;
1155                 p_this_ccw->header.flag=CLAW_PENDING;
1156                 privptr->p_write_active_first=p_this_ccw->next;
1157                 p_this_ccw->next=privptr->p_write_free_chain;
1158                 privptr->p_write_free_chain=p_this_ccw;
1159                 ++privptr->write_free_count;
1160         }
1161         privptr->p_write_active_last=NULL;
1162         privptr->mtc_logical_link = -1;
1163         privptr->mtc_skipping = 1;
1164         privptr->mtc_offset=0;
1165
1166         if (((privptr->channel[READ].last_dstat |
1167                 privptr->channel[WRITE].last_dstat) &
1168                 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
1169                 printk(KERN_WARNING "%s: channel problems during close - "
1170                         "read: %02x -  write: %02x\n",
1171                 dev->name,
1172                 privptr->channel[READ].last_dstat,
1173                 privptr->channel[WRITE].last_dstat);
1174                  CLAW_DBF_TEXT(2,trace,"badclose");
1175         }
1176 #ifdef FUNCTRACE
1177         printk(KERN_INFO "%s:%s Exit on line %d\n",
1178                 dev->name,__FUNCTION__,__LINE__);
1179 #endif
1180         CLAW_DBF_TEXT(4,trace,"rlsexit");
1181         return 0;
1182 }      /* end of claw_release     */
1183
1184
1185
1186 /*-------------------------------------------------------------------*
1187 *       claw_write_retry                                             *
1188 *                                                                    *
1189 *--------------------------------------------------------------------*/
1190
1191 static void
1192 claw_write_retry ( struct chbk *p_ch )
1193 {
1194
1195         struct net_device  *dev=p_ch->ndev;
1196
1197
1198 #ifdef FUNCTRACE
1199         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
1200         printk(KERN_INFO "claw: variable p_ch =\n");
1201         dumpit((char *) p_ch, sizeof(struct chbk));
1202 #endif
1203         CLAW_DBF_TEXT(4,trace,"w_retry");
1204         if (p_ch->claw_state == CLAW_STOP) {
1205 #ifdef FUNCTRACE
1206                 printk(KERN_INFO "%s:%s Exit on line %d\n",
1207                         dev->name,__FUNCTION__,__LINE__);
1208 #endif
1209                 return;
1210         }
1211 #ifdef DEBUGMSG
1212         printk( KERN_INFO "%s:%s  state-%02x\n" ,
1213                 dev->name,
1214                 __FUNCTION__,
1215                 p_ch->claw_state);
1216 #endif
1217         claw_strt_out_IO( dev );
1218 #ifdef FUNCTRACE
1219         printk(KERN_INFO "%s:%s Exit on line %d\n",
1220                 dev->name,__FUNCTION__,__LINE__);
1221 #endif
1222         CLAW_DBF_TEXT(4,trace,"rtry_xit");
1223         return;
1224 }      /* end of claw_write_retry      */
1225
1226
1227 /*-------------------------------------------------------------------*
1228 *       claw_write_next                                              *
1229 *                                                                    *
1230 *--------------------------------------------------------------------*/
1231
1232 static void
1233 claw_write_next ( struct chbk * p_ch )
1234 {
1235
1236         struct net_device  *dev;
1237         struct claw_privbk *privptr=NULL;
1238         struct sk_buff *pk_skb;
1239         int     rc;
1240
1241 #ifdef FUNCTRACE
1242         printk(KERN_INFO "%s:%s Enter  \n",p_ch->ndev->name,__FUNCTION__);
1243         printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
1244         dumpit((char *) p_ch, sizeof(struct chbk));
1245 #endif
1246         CLAW_DBF_TEXT(4,trace,"claw_wrt");
1247         if (p_ch->claw_state == CLAW_STOP)
1248                 return;
1249         dev = (struct net_device *) p_ch->ndev;
1250         privptr = (struct claw_privbk *) dev->priv;
1251         claw_free_wrt_buf( dev );
1252         if ((privptr->write_free_count > 0) &&
1253             !skb_queue_empty(&p_ch->collect_queue)) {
1254                 pk_skb = claw_pack_skb(privptr);
1255                 while (pk_skb != NULL) {
1256                         rc = claw_hw_tx( pk_skb, dev,1);
1257                         if (privptr->write_free_count > 0) {
1258                                 pk_skb = claw_pack_skb(privptr);
1259                         } else
1260                                 pk_skb = NULL;
1261                 }
1262         }
1263         if (privptr->p_write_active_first!=NULL) {
1264                 claw_strt_out_IO(dev);
1265         }
1266
1267 #ifdef FUNCTRACE
1268         printk(KERN_INFO "%s:%s Exit on line %d\n",
1269                 dev->name,__FUNCTION__,__LINE__);
1270 #endif
1271         return;
1272 }      /* end of claw_write_next      */
1273
1274 /*-------------------------------------------------------------------*
1275 *                                                                    *
1276 *       claw_timer                                                   *
1277 *--------------------------------------------------------------------*/
1278
1279 static void
1280 claw_timer ( struct chbk * p_ch )
1281 {
1282 #ifdef FUNCTRACE
1283         printk(KERN_INFO "%s:%s Entry\n",p_ch->ndev->name,__FUNCTION__);
1284         printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
1285         dumpit((char *) p_ch, sizeof(struct chbk));
1286 #endif
1287         CLAW_DBF_TEXT(4,trace,"timer");
1288         p_ch->flag |= CLAW_TIMER;
1289         wake_up(&p_ch->wait);
1290 #ifdef FUNCTRACE
1291         printk(KERN_INFO "%s:%s Exit on line %d\n",
1292                 p_ch->ndev->name,__FUNCTION__,__LINE__);
1293 #endif
1294         return;
1295 }      /* end of claw_timer  */
1296
1297
1298 /*
1299 *
1300 *       functions
1301 */
1302
1303
1304 /*-------------------------------------------------------------------*
1305 *                                                                    *
1306 *     pages_to_order_of_mag                                          *
1307 *                                                                    *
1308 *    takes a number of pages from 1 to 512 and returns the           *
1309 *    log(num_pages)/log(2) get_free_pages() needs a base 2 order     *
1310 *    of magnitude get_free_pages() has an upper order of 9           *
1311 *--------------------------------------------------------------------*/
1312
1313 static int inline
1314 pages_to_order_of_mag(int num_of_pages)
1315 {
1316         int     order_of_mag=1;         /* assume 2 pages */
1317         int     nump=2;
1318 #ifdef FUNCTRACE
1319         printk(KERN_INFO "%s Enter pages = %d \n",__FUNCTION__,num_of_pages);
1320 #endif
1321         CLAW_DBF_TEXT_(5,trace,"pages%d",num_of_pages);
1322         if (num_of_pages == 1)   {return 0; }  /* magnitude of 0 = 1 page */
1323         /* 512 pages = 2Meg on 4k page systems */
1324         if (num_of_pages >= 512) {return 9; }
1325         /* we have two or more pages order is at least 1 */
1326         for (nump=2 ;nump <= 512;nump*=2) {
1327           if (num_of_pages <= nump)
1328                   break;
1329           order_of_mag +=1;
1330         }
1331         if (order_of_mag > 9) { order_of_mag = 9; }  /* I know it's paranoid */
1332 #ifdef FUNCTRACE
1333         printk(KERN_INFO "%s Exit on line %d, order = %d\n",
1334         __FUNCTION__,__LINE__, order_of_mag);
1335 #endif
1336         CLAW_DBF_TEXT_(5,trace,"mag%d",order_of_mag);
1337         return order_of_mag;
1338 }
1339
1340 /*-------------------------------------------------------------------*
1341 *                                                                    *
1342 *     add_claw_reads                                                 *
1343 *                                                                    *
1344 *--------------------------------------------------------------------*/
1345 static int
1346 add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
1347         struct ccwbk* p_last)
1348 {
1349         struct claw_privbk *privptr;
1350         struct ccw1  temp_ccw;
1351         struct endccw * p_end;
1352 #ifdef IOTRACE
1353         struct ccwbk*  p_buf;
1354 #endif
1355 #ifdef FUNCTRACE
1356         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
1357 #endif
1358 #ifdef DEBUGMSG
1359         printk(KERN_INFO "dev\n");
1360         dumpit((char *) dev, sizeof(struct net_device));
1361         printk(KERN_INFO "p_first\n");
1362         dumpit((char *) p_first, sizeof(struct ccwbk));
1363         printk(KERN_INFO "p_last\n");
1364         dumpit((char *) p_last, sizeof(struct ccwbk));
1365 #endif
1366         CLAW_DBF_TEXT(4,trace,"addreads");
1367         privptr = dev->priv;
1368         p_end = privptr->p_end_ccw;
1369
1370         /* first CCW and last CCW contains a new set of read channel programs
1371         *       to apend the running channel programs
1372         */
1373         if ( p_first==NULL) {
1374 #ifdef FUNCTRACE
1375                 printk(KERN_INFO "%s:%s Exit on line %d\n",
1376                         dev->name,__FUNCTION__,__LINE__);
1377 #endif
1378                 CLAW_DBF_TEXT(4,trace,"addexit");
1379                 return 0;
1380         }
1381
1382         /* set up ending CCW sequence for this segment */
1383         if (p_end->read1) {
1384                 p_end->read1=0x00;    /*  second ending CCW is now active */
1385                 /*      reset ending CCWs and setup TIC CCWs              */
1386                 p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1387                 p_end->read2_nop2.flags  = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1388                 p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
1389                 p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
1390                 p_end->read2_nop2.cda=0;
1391                 p_end->read2_nop2.count=1;
1392         }
1393         else {
1394                 p_end->read1=0x01;  /* first ending CCW is now active */
1395                 /*      reset ending CCWs and setup TIC CCWs          */
1396                 p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1397                 p_end->read1_nop2.flags  = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1398                 p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
1399                 p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
1400                 p_end->read1_nop2.cda=0;
1401                 p_end->read1_nop2.count=1;
1402         }
1403
1404         if ( privptr-> p_read_active_first ==NULL ) {
1405 #ifdef DEBUGMSG
1406                 printk(KERN_INFO "%s:%s p_read_active_first == NULL \n",
1407                         dev->name,__FUNCTION__);
1408                 printk(KERN_INFO "%s:%s Read active first/last changed \n",
1409                         dev->name,__FUNCTION__);
1410 #endif
1411                 privptr-> p_read_active_first= p_first;  /*    set new first */
1412                 privptr-> p_read_active_last = p_last;   /*    set new last  */
1413         }
1414         else {
1415
1416 #ifdef DEBUGMSG
1417                 printk(KERN_INFO "%s:%s Read in progress \n",
1418                 dev->name,__FUNCTION__);
1419 #endif
1420                 /* set up TIC ccw  */
1421                 temp_ccw.cda= (__u32)__pa(&p_first->read);
1422                 temp_ccw.count=0;
1423                 temp_ccw.flags=0;
1424                 temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
1425
1426
1427                 if (p_end->read1) {
1428
1429                /* first set of CCW's is chained to the new read              */
1430                /* chain, so the second set is chained to the active chain.   */
1431                /* Therefore modify the second set to point to the new        */
1432                /* read chain set up TIC CCWs                                 */
1433                /* make sure we update the CCW so channel doesn't fetch it    */
1434                /* when it's only half done                                   */
1435                         memcpy( &p_end->read2_nop2, &temp_ccw ,
1436                                 sizeof(struct ccw1));
1437                         privptr->p_read_active_last->r_TIC_1.cda=
1438                                 (__u32)__pa(&p_first->read);
1439                         privptr->p_read_active_last->r_TIC_2.cda=
1440                                 (__u32)__pa(&p_first->read);
1441                 }
1442                 else {
1443                         /* make sure we update the CCW so channel doesn't   */
1444                         /* fetch it when it is only half done               */
1445                         memcpy( &p_end->read1_nop2, &temp_ccw ,
1446                                 sizeof(struct ccw1));
1447                         privptr->p_read_active_last->r_TIC_1.cda=
1448                                 (__u32)__pa(&p_first->read);
1449                         privptr->p_read_active_last->r_TIC_2.cda=
1450                                 (__u32)__pa(&p_first->read);
1451                 }
1452                 /*      chain in new set of blocks                              */
1453                 privptr->p_read_active_last->next = p_first;
1454                 privptr->p_read_active_last=p_last;
1455         } /* end of if ( privptr-> p_read_active_first ==NULL)  */
1456 #ifdef IOTRACE
1457         printk(KERN_INFO "%s:%s  dump p_last CCW BK \n",dev->name,__FUNCTION__);
1458         dumpit((char *)p_last, sizeof(struct ccwbk));
1459         printk(KERN_INFO "%s:%s  dump p_end CCW BK \n",dev->name,__FUNCTION__);
1460         dumpit((char *)p_end, sizeof(struct endccw));
1461
1462         printk(KERN_INFO "%s:%s dump p_first CCW BK \n",dev->name,__FUNCTION__);
1463         dumpit((char *)p_first, sizeof(struct ccwbk));
1464         printk(KERN_INFO "%s:%s Dump Active CCW chain \n",
1465                 dev->name,__FUNCTION__);
1466         p_buf=privptr->p_read_active_first;
1467         while (p_buf!=NULL) {
1468                 dumpit((char *)p_buf, sizeof(struct ccwbk));
1469                 p_buf=p_buf->next;
1470         }
1471 #endif
1472 #ifdef FUNCTRACE
1473         printk(KERN_INFO "%s:%s Exit on line %d\n",
1474                 dev->name,__FUNCTION__,__LINE__);
1475 #endif
1476         CLAW_DBF_TEXT(4,trace,"addexit");
1477         return 0;
1478 }    /*     end of add_claw_reads   */
1479
1480 /*-------------------------------------------------------------------*
1481  *   ccw_check_return_code                                           *
1482  *                                                                   *
1483  *-------------------------------------------------------------------*/
1484
1485 static void inline
1486 ccw_check_return_code(struct ccw_device *cdev, int return_code)
1487 {
1488 #ifdef FUNCTRACE
1489         printk(KERN_INFO "%s: %s() > enter  \n",
1490                 cdev->dev.bus_id,__FUNCTION__);
1491 #endif
1492         CLAW_DBF_TEXT(4,trace,"ccwret");
1493 #ifdef DEBUGMSG
1494         printk(KERN_INFO "variable cdev =\n");
1495         dumpit((char *) cdev, sizeof(struct ccw_device));
1496         printk(KERN_INFO "variable return_code = %d\n",return_code);
1497 #endif
1498         if (return_code != 0) {
1499                 switch (return_code) {
1500                         case -EBUSY:
1501                                 printk(KERN_INFO "%s: Busy !\n",
1502                                         cdev->dev.bus_id);
1503                                 break;
1504                         case -ENODEV:
1505                                 printk(KERN_EMERG "%s: Missing device called "
1506                                         "for IO ENODEV\n", cdev->dev.bus_id);
1507                                 break;
1508                         case -EIO:
1509                                 printk(KERN_EMERG "%s: Status pending... EIO \n",
1510                                         cdev->dev.bus_id);
1511                                 break;
1512                         case -EINVAL:
1513                                 printk(KERN_EMERG "%s: Invalid Dev State EINVAL \n",
1514                                         cdev->dev.bus_id);
1515                                 break;
1516                         default:
1517                                 printk(KERN_EMERG "%s: Unknown error in "
1518                                  "Do_IO %d\n",cdev->dev.bus_id, return_code);
1519                 }
1520         }
1521 #ifdef FUNCTRACE
1522         printk(KERN_INFO "%s: %s() > exit on line %d\n",
1523                 cdev->dev.bus_id,__FUNCTION__,__LINE__);
1524 #endif
1525         CLAW_DBF_TEXT(4,trace,"ccwret");
1526 }    /*    end of ccw_check_return_code   */
1527
1528 /*-------------------------------------------------------------------*
1529 *       ccw_check_unit_check                                         *
1530 *--------------------------------------------------------------------*/
1531
1532 static void inline
1533 ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
1534 {
1535         struct net_device *dev = p_ch->ndev;
1536
1537 #ifdef FUNCTRACE
1538         printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
1539 #endif
1540 #ifdef DEBUGMSG
1541         printk(KERN_INFO "%s: variable dev =\n",dev->name);
1542         dumpit((char *)dev, sizeof(struct net_device));
1543         printk(KERN_INFO "%s: variable sense =\n",dev->name);
1544         dumpit((char *)&sense, 2);
1545 #endif
1546         CLAW_DBF_TEXT(4,trace,"unitchek");
1547
1548         printk(KERN_INFO "%s: Unit Check with sense byte:0x%04x\n",
1549                 dev->name, sense);
1550
1551         if (sense & 0x40) {
1552                 if (sense & 0x01) {
1553                         printk(KERN_WARNING "%s: Interface disconnect or "
1554                                 "Selective reset "
1555                                 "occurred (remote side)\n", dev->name);
1556                 }
1557                 else {
1558                         printk(KERN_WARNING "%s: System reset occured"
1559                                 " (remote side)\n", dev->name);
1560                 }
1561         }
1562         else if (sense & 0x20) {
1563                 if (sense & 0x04) {
1564                         printk(KERN_WARNING "%s: Data-streaming "
1565                                 "timeout)\n", dev->name);
1566                 }
1567                 else  {
1568                         printk(KERN_WARNING "%s: Data-transfer parity"
1569                                 " error\n", dev->name);
1570                 }
1571         }
1572         else if (sense & 0x10) {
1573                 if (sense & 0x20) {
1574                         printk(KERN_WARNING "%s: Hardware malfunction "
1575                                 "(remote side)\n", dev->name);
1576                 }
1577                 else {
1578                         printk(KERN_WARNING "%s: read-data parity error "
1579                                 "(remote side)\n", dev->name);
1580                 }
1581         }
1582
1583 #ifdef FUNCTRACE
1584         printk(KERN_INFO "%s: %s() exit on line %d\n",
1585                 dev->name,__FUNCTION__,__LINE__);
1586 #endif
1587 }   /*    end of ccw_check_unit_check    */
1588
1589
1590
1591 /*-------------------------------------------------------------------*
1592 * Dump buffer format                                                 *
1593 *                                                                    *
1594 *--------------------------------------------------------------------*/
1595 #ifdef DEBUG
1596 static void
1597 dumpit(char* buf, int len)
1598 {
1599
1600         __u32      ct, sw, rm, dup;
1601         char       *ptr, *rptr;
1602         char       tbuf[82], tdup[82];
1603 #if (CONFIG_64BIT)
1604         char       addr[22];
1605 #else
1606         char       addr[12];
1607 #endif
1608         char       boff[12];
1609         char       bhex[82], duphex[82];
1610         char       basc[40];
1611
1612         sw  = 0;
1613         rptr =ptr=buf;
1614         rm  = 16;
1615         duphex[0]  = 0x00;
1616         dup = 0;
1617         for ( ct=0; ct < len; ct++, ptr++, rptr++ )  {
1618                 if (sw == 0) {
1619 #if (CONFIG_64BIT)
1620                         sprintf(addr, "%16.16lX",(unsigned long)rptr);
1621 #else
1622                         sprintf(addr, "%8.8X",(__u32)rptr);
1623 #endif
1624                         sprintf(boff, "%4.4X", (__u32)ct);
1625                         bhex[0] = '\0';
1626                         basc[0] = '\0';
1627                 }
1628                 if ((sw == 4) || (sw == 12)) {
1629                         strcat(bhex, " ");
1630                 }
1631                 if (sw == 8) {
1632                         strcat(bhex, "  ");
1633                 }
1634 #if (CONFIG_64BIT)
1635                 sprintf(tbuf,"%2.2lX", (unsigned long)*ptr);
1636 #else
1637                 sprintf(tbuf,"%2.2X", (__u32)*ptr);
1638 #endif
1639                 tbuf[2] = '\0';
1640                 strcat(bhex, tbuf);
1641                 if ((0!=isprint(*ptr)) && (*ptr >= 0x20)) {
1642                         basc[sw] = *ptr;
1643                 }
1644                 else {
1645                         basc[sw] = '.';
1646                 }
1647                 basc[sw+1] = '\0';
1648                 sw++;
1649                 rm--;
1650                 if (sw==16) {
1651                         if ((strcmp(duphex, bhex)) !=0) {
1652                                 if (dup !=0) {
1653                                         sprintf(tdup,"Duplicate as above to"
1654                                                 " %s", addr);
1655                                         printk( KERN_INFO "                 "
1656                                                 "   --- %s ---\n",tdup);
1657                                 }
1658                                 printk( KERN_INFO "   %s (+%s) : %s  [%s]\n",
1659                                          addr, boff, bhex, basc);
1660                                 dup = 0;
1661                                 strcpy(duphex, bhex);
1662                         }
1663                         else {
1664                                 dup++;
1665                         }
1666                         sw = 0;
1667                         rm = 16;
1668                 }
1669         }  /* endfor */
1670
1671         if (sw != 0) {
1672                 for ( ; rm > 0; rm--, sw++ ) {
1673                         if ((sw==4) || (sw==12)) strcat(bhex, " ");
1674                         if (sw==8)               strcat(bhex, "  ");
1675                         strcat(bhex, "  ");
1676                         strcat(basc, " ");
1677                 }
1678                 if (dup !=0) {
1679                         sprintf(tdup,"Duplicate as above to %s", addr);
1680                         printk( KERN_INFO "                    --- %s ---\n",
1681                                 tdup);
1682                 }
1683                 printk( KERN_INFO "   %s (+%s) : %s  [%s]\n",
1684                         addr, boff, bhex, basc);
1685         }
1686         else {
1687                 if (dup >=1) {
1688                         sprintf(tdup,"Duplicate as above to %s", addr);
1689                         printk( KERN_INFO "                    --- %s ---\n",
1690                                 tdup);
1691                 }
1692                 if (dup !=0) {
1693                         printk( KERN_INFO "   %s (+%s) : %s  [%s]\n",
1694                                 addr, boff, bhex, basc);
1695                 }
1696         }
1697         return;
1698
1699 }   /*   end of dumpit  */
1700 #endif
1701
1702 /*-------------------------------------------------------------------*
1703 *               find_link                                            *
1704 *--------------------------------------------------------------------*/
1705 static int
1706 find_link(struct net_device *dev, char *host_name, char *ws_name )
1707 {
1708         struct claw_privbk *privptr;
1709         struct claw_env *p_env;
1710         int    rc=0;
1711
1712 #ifdef FUNCTRACE
1713         printk(KERN_INFO "%s:%s > enter  \n",dev->name,__FUNCTION__);
1714 #endif
1715         CLAW_DBF_TEXT(2,setup,"findlink");
1716 #ifdef DEBUGMSG
1717         printk(KERN_INFO "%s: variable dev = \n",dev->name);
1718         dumpit((char *) dev, sizeof(struct net_device));
1719         printk(KERN_INFO "%s: variable host_name = %s\n",dev->name, host_name);
1720         printk(KERN_INFO "%s: variable ws_name = %s\n",dev->name, ws_name);
1721 #endif
1722         privptr=dev->priv;
1723         p_env=privptr->p_env;
1724         switch (p_env->packing)
1725         {
1726                 case  PACKING_ASK:
1727                         if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
1728                             (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
1729                              rc = EINVAL;
1730                         break;
1731                 case  DO_PACKED:
1732                 case  PACK_SEND:
1733                         if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
1734                             (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
1735                                 rc = EINVAL;
1736                         break;
1737                 default:
1738                         if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
1739                             (memcmp(p_env->api_type , ws_name, 8)!=0))
1740                                 rc = EINVAL;
1741                         break;
1742         }
1743
1744 #ifdef FUNCTRACE
1745         printk(KERN_INFO "%s:%s Exit on line %d\n",
1746                 dev->name,__FUNCTION__,__LINE__);
1747 #endif
1748         return 0;
1749 }    /*    end of find_link    */
1750
1751 /*-------------------------------------------------------------------*
1752  *   claw_hw_tx                                                      *
1753  *                                                                   *
1754  *                                                                   *
1755  *-------------------------------------------------------------------*/
1756
1757 static int
1758 claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
1759 {
1760         int                             rc=0;
1761         struct claw_privbk              *privptr;
1762         struct ccwbk           *p_this_ccw;
1763         struct ccwbk           *p_first_ccw;
1764         struct ccwbk           *p_last_ccw;
1765         __u32                           numBuffers;
1766         signed long                     len_of_data;
1767         unsigned long                   bytesInThisBuffer;
1768         unsigned char                   *pDataAddress;
1769         struct endccw                   *pEnd;
1770         struct ccw1                     tempCCW;
1771         struct chbk                     *p_ch;
1772         struct claw_env                 *p_env;
1773         int                             lock;
1774         struct clawph                   *pk_head;
1775         struct chbk                     *ch;
1776 #ifdef IOTRACE
1777         struct ccwbk                   *p_buf;
1778 #endif
1779 #ifdef FUNCTRACE
1780         printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
1781 #endif
1782         CLAW_DBF_TEXT(4,trace,"hw_tx");
1783 #ifdef DEBUGMSG
1784         printk(KERN_INFO "%s: variable dev skb =\n",dev->name);
1785         dumpit((char *) skb, sizeof(struct sk_buff));
1786         printk(KERN_INFO "%s: variable dev =\n",dev->name);
1787         dumpit((char *) dev, sizeof(struct net_device));
1788         printk(KERN_INFO "%s: variable linkid = %ld\n",dev->name,linkid);
1789 #endif
1790         privptr = (struct claw_privbk *) (dev->priv);
1791         p_ch=(struct chbk *)&privptr->channel[WRITE];
1792         p_env =privptr->p_env;
1793 #ifdef IOTRACE
1794         printk(KERN_INFO "%s: %s() dump sk_buff  \n",dev->name,__FUNCTION__);
1795         dumpit((char *)skb ,sizeof(struct sk_buff));
1796 #endif
1797         claw_free_wrt_buf(dev); /* Clean up free chain if posible */
1798         /*  scan the write queue to free any completed write packets   */
1799         p_first_ccw=NULL;
1800         p_last_ccw=NULL;
1801         if ((p_env->packing >= PACK_SEND) &&
1802             (skb->cb[1] != 'P')) {
1803                 skb_push(skb,sizeof(struct clawph));
1804                 pk_head=(struct clawph *)skb->data;
1805                 pk_head->len=skb->len-sizeof(struct clawph);
1806                 if (pk_head->len%4)  {
1807                         pk_head->len+= 4-(pk_head->len%4);
1808                         skb_pad(skb,4-(pk_head->len%4));
1809                         skb_put(skb,4-(pk_head->len%4));
1810                 }
1811                 if (p_env->packing == DO_PACKED)
1812                         pk_head->link_num = linkid;
1813                 else
1814                         pk_head->link_num = 0;
1815                 pk_head->flag = 0x00;
1816                 skb_pad(skb,4);
1817                 skb->cb[1] = 'P';
1818         }
1819         if (linkid == 0) {
1820                 if (claw_check_busy(dev)) {
1821                         if (privptr->write_free_count!=0) {
1822                                 claw_clear_busy(dev);
1823                         }
1824                         else {
1825                                 claw_strt_out_IO(dev );
1826                                 claw_free_wrt_buf( dev );
1827                                 if (privptr->write_free_count==0) {
1828 #ifdef IOTRACE
1829                                         printk(KERN_INFO "%s: "
1830                                            "(claw_check_busy) no free write "
1831                                            "buffers\n", dev->name);
1832 #endif
1833                                         ch = &privptr->channel[WRITE];
1834                                         atomic_inc(&skb->users);
1835                                         skb_queue_tail(&ch->collect_queue, skb);
1836                                         goto Done;
1837                                 }
1838                                 else {
1839                                         claw_clear_busy(dev);
1840                                 }
1841                         }
1842                 }
1843                 /*  tx lock  */
1844                 if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
1845 #ifdef DEBUGMSG
1846                         printk(KERN_INFO "%s:  busy  (claw_test_and_setbit_"
1847                                 "busy)\n", dev->name);
1848 #endif
1849                         ch = &privptr->channel[WRITE];
1850                         atomic_inc(&skb->users);
1851                         skb_queue_tail(&ch->collect_queue, skb);
1852                         claw_strt_out_IO(dev );
1853                         rc=-EBUSY;
1854                         goto Done2;
1855                 }
1856         }
1857         /*      See how many write buffers are required to hold this data */
1858         numBuffers= ( skb->len + privptr->p_env->write_size - 1) /
1859                         ( privptr->p_env->write_size);
1860
1861         /*      If that number of buffers isn't available, give up for now */
1862         if (privptr->write_free_count < numBuffers ||
1863             privptr->p_write_free_chain == NULL ) {
1864
1865                 claw_setbit_busy(TB_NOBUFFER,dev);
1866
1867 #ifdef DEBUGMSG
1868                 printk(KERN_INFO "%s:  busy  (claw_setbit_busy"
1869                         "(TB_NOBUFFER))\n", dev->name);
1870                 printk(KERN_INFO "       free_count: %d, numBuffers : %d\n",
1871                         (int)privptr->write_free_count,(int) numBuffers );
1872 #endif
1873                 ch = &privptr->channel[WRITE];
1874                 atomic_inc(&skb->users);
1875                 skb_queue_tail(&ch->collect_queue, skb);
1876                 CLAW_DBF_TEXT(2,trace,"clawbusy");
1877                 goto Done2;
1878         }
1879         pDataAddress=skb->data;
1880         len_of_data=skb->len;
1881
1882         while (len_of_data > 0) {
1883 #ifdef DEBUGMSG
1884                 printk(KERN_INFO "%s: %s() length-of-data is %ld \n",
1885                         dev->name ,__FUNCTION__,len_of_data);
1886                 dumpit((char *)pDataAddress ,64);
1887 #endif
1888                 p_this_ccw=privptr->p_write_free_chain;  /* get a block */
1889                 if (p_this_ccw == NULL) { /* lost the race */
1890                         ch = &privptr->channel[WRITE];
1891                         atomic_inc(&skb->users);
1892                         skb_queue_tail(&ch->collect_queue, skb);
1893                         goto Done2;
1894                 }
1895                 privptr->p_write_free_chain=p_this_ccw->next;
1896                 p_this_ccw->next=NULL;
1897                 --privptr->write_free_count; /* -1 */
1898                 bytesInThisBuffer=len_of_data;
1899                 memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
1900                 len_of_data-=bytesInThisBuffer;
1901                 pDataAddress+=(unsigned long)bytesInThisBuffer;
1902                 /*      setup write CCW         */
1903                 p_this_ccw->write.cmd_code = (linkid * 8) +1;
1904                 if (len_of_data>0) {
1905                         p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
1906                 }
1907                 p_this_ccw->write.count=bytesInThisBuffer;
1908                 /*      now add to end of this chain    */
1909                 if (p_first_ccw==NULL)    {
1910                         p_first_ccw=p_this_ccw;
1911                 }
1912                 if (p_last_ccw!=NULL) {
1913                         p_last_ccw->next=p_this_ccw;
1914                         /*      set up TIC ccws         */
1915                         p_last_ccw->w_TIC_1.cda=
1916                                 (__u32)__pa(&p_this_ccw->write);
1917                 }
1918                 p_last_ccw=p_this_ccw;      /* save new last block */
1919 #ifdef IOTRACE
1920                 printk(KERN_INFO "%s: %s() > CCW and Buffer %ld bytes long \n",
1921                         dev->name,__FUNCTION__,bytesInThisBuffer);
1922                 dumpit((char *)p_this_ccw, sizeof(struct ccwbk));
1923                 dumpit((char *)p_this_ccw->p_buffer, 64);
1924 #endif
1925         }
1926
1927         /*      FirstCCW and LastCCW now contain a new set of write channel
1928         *       programs to append to the running channel program
1929         */
1930
1931         if (p_first_ccw!=NULL) {
1932                 /*      setup ending ccw sequence for this segment              */
1933                 pEnd=privptr->p_end_ccw;
1934                 if (pEnd->write1) {
1935                         pEnd->write1=0x00;   /* second end ccw is now active */
1936                         /*      set up Tic CCWs         */
1937                         p_last_ccw->w_TIC_1.cda=
1938                                 (__u32)__pa(&pEnd->write2_nop1);
1939                         pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1940                         pEnd->write2_nop2.flags    =
1941                                 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1942                         pEnd->write2_nop2.cda=0;
1943                         pEnd->write2_nop2.count=1;
1944                 }
1945                 else {  /*  end of if (pEnd->write1)*/
1946                         pEnd->write1=0x01;   /* first end ccw is now active */
1947                         /*      set up Tic CCWs         */
1948                         p_last_ccw->w_TIC_1.cda=
1949                                 (__u32)__pa(&pEnd->write1_nop1);
1950                         pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1951                         pEnd->write1_nop2.flags    =
1952                                 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1953                         pEnd->write1_nop2.cda=0;
1954                         pEnd->write1_nop2.count=1;
1955                 }  /* end if if (pEnd->write1) */
1956
1957
1958                 if (privptr->p_write_active_first==NULL ) {
1959                         privptr->p_write_active_first=p_first_ccw;
1960                         privptr->p_write_active_last=p_last_ccw;
1961                 }
1962                 else {
1963
1964                         /*      set up Tic CCWs         */
1965
1966                         tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
1967                         tempCCW.count=0;
1968                         tempCCW.flags=0;
1969                         tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
1970
1971                         if (pEnd->write1) {
1972
1973                  /*
1974                  * first set of ending CCW's is chained to the new write
1975                  * chain, so the second set is chained to the active chain
1976                  * Therefore modify the second set to point the new write chain.
1977                  * make sure we update the CCW atomically
1978                  * so channel does not fetch it when it's only half done
1979                  */
1980                                 memcpy( &pEnd->write2_nop2, &tempCCW ,
1981                                         sizeof(struct ccw1));
1982                                 privptr->p_write_active_last->w_TIC_1.cda=
1983                                         (__u32)__pa(&p_first_ccw->write);
1984                         }
1985                         else {
1986
1987                         /*make sure we update the CCW atomically
1988                          *so channel does not fetch it when it's only half done
1989                          */
1990                                 memcpy(&pEnd->write1_nop2, &tempCCW ,
1991                                         sizeof(struct ccw1));
1992                                 privptr->p_write_active_last->w_TIC_1.cda=
1993                                         (__u32)__pa(&p_first_ccw->write);
1994
1995                         } /* end if if (pEnd->write1) */
1996
1997                         privptr->p_write_active_last->next=p_first_ccw;
1998                         privptr->p_write_active_last=p_last_ccw;
1999                 }
2000
2001         } /* endif (p_first_ccw!=NULL)  */
2002
2003
2004 #ifdef IOTRACE
2005         printk(KERN_INFO "%s: %s() >  Dump Active CCW chain \n",
2006                 dev->name,__FUNCTION__);
2007         p_buf=privptr->p_write_active_first;
2008         while (p_buf!=NULL) {
2009                 dumpit((char *)p_buf, sizeof(struct ccwbk));
2010                 p_buf=p_buf->next;
2011         }
2012         p_buf=(struct ccwbk*)privptr->p_end_ccw;
2013         dumpit((char *)p_buf, sizeof(struct endccw));
2014 #endif
2015         dev_kfree_skb_any(skb);
2016         if (linkid==0) {
2017                 lock=LOCK_NO;
2018         }
2019         else  {
2020                 lock=LOCK_YES;
2021         }
2022         claw_strt_out_IO(dev );
2023         /*      if write free count is zero , set NOBUFFER       */
2024 #ifdef DEBUGMSG
2025         printk(KERN_INFO "%s: %s() > free_count is %d\n",
2026                 dev->name,__FUNCTION__,
2027                 (int) privptr->write_free_count );
2028 #endif
2029         if (privptr->write_free_count==0) {
2030                 claw_setbit_busy(TB_NOBUFFER,dev);
2031         }
2032 Done2:
2033         claw_clearbit_busy(TB_TX,dev);
2034 Done:
2035 #ifdef FUNCTRACE
2036         printk(KERN_INFO "%s: %s() > exit on line %d, rc = %d \n",
2037                 dev->name,__FUNCTION__,__LINE__, rc);
2038 #endif
2039         return(rc);
2040 }    /*    end of claw_hw_tx    */
2041
2042 /*-------------------------------------------------------------------*
2043 *                                                                    *
2044 *     init_ccw_bk                                                    *
2045 *                                                                    *
2046 *--------------------------------------------------------------------*/
2047
2048 static int
2049 init_ccw_bk(struct net_device *dev)
2050 {
2051
2052         __u32   ccw_blocks_required;
2053         __u32   ccw_blocks_perpage;
2054         __u32   ccw_pages_required;
2055         __u32   claw_reads_perpage=1;
2056         __u32   claw_read_pages;
2057         __u32   claw_writes_perpage=1;
2058         __u32   claw_write_pages;
2059         void    *p_buff=NULL;
2060         struct ccwbk*p_free_chain;
2061         struct ccwbk*p_buf;
2062         struct ccwbk*p_last_CCWB;
2063         struct ccwbk*p_first_CCWB;
2064         struct endccw *p_endccw=NULL;
2065         addr_t  real_address;
2066         struct claw_privbk *privptr=dev->priv;
2067         struct clawh *pClawH=NULL;
2068         addr_t   real_TIC_address;
2069         int i,j;
2070 #ifdef FUNCTRACE
2071         printk(KERN_INFO "%s: %s() enter  \n",dev->name,__FUNCTION__);
2072 #endif
2073         CLAW_DBF_TEXT(4,trace,"init_ccw");
2074 #ifdef DEBUGMSG
2075         printk(KERN_INFO "%s: variable dev =\n",dev->name);
2076         dumpit((char *) dev, sizeof(struct net_device));
2077 #endif
2078
2079         /*  initialize  statistics field */
2080         privptr->active_link_ID=0;
2081         /*  initialize  ccwbk pointers  */
2082         privptr->p_write_free_chain=NULL;   /* pointer to free ccw chain*/
2083         privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
2084         privptr->p_write_active_last=NULL;  /* pointer to the last write ccw*/
2085         privptr->p_read_active_first=NULL;  /* pointer to the first read ccw*/
2086         privptr->p_read_active_last=NULL;   /* pointer to the last read ccw */
2087         privptr->p_end_ccw=NULL;            /* pointer to ending ccw        */
2088         privptr->p_claw_signal_blk=NULL;    /* pointer to signal block      */
2089         privptr->buffs_alloc = 0;
2090         memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
2091         memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
2092         /*  initialize  free write ccwbk counter  */
2093         privptr->write_free_count=0;  /* number of free bufs on write chain */
2094         p_last_CCWB = NULL;
2095         p_first_CCWB= NULL;
2096         /*
2097         *  We need 1 CCW block for each read buffer, 1 for each
2098         *  write buffer, plus 1 for ClawSignalBlock
2099         */
2100         ccw_blocks_required =
2101                 privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
2102 #ifdef DEBUGMSG
2103         printk(KERN_INFO "%s: %s() "
2104                 "ccw_blocks_required=%d\n",
2105                 dev->name,__FUNCTION__,
2106                 ccw_blocks_required);
2107         printk(KERN_INFO "%s: %s() "
2108                 "PAGE_SIZE=0x%x\n",
2109                 dev->name,__FUNCTION__,
2110                 (unsigned int)PAGE_SIZE);
2111         printk(KERN_INFO "%s: %s() > "
2112                 "PAGE_MASK=0x%x\n",
2113                 dev->name,__FUNCTION__,
2114                 (unsigned int)PAGE_MASK);
2115 #endif
2116         /*
2117         * compute number of CCW blocks that will fit in a page
2118         */
2119         ccw_blocks_perpage= PAGE_SIZE /  CCWBK_SIZE;
2120         ccw_pages_required=
2121                 (ccw_blocks_required+ccw_blocks_perpage -1) /
2122                          ccw_blocks_perpage;
2123
2124 #ifdef DEBUGMSG
2125         printk(KERN_INFO "%s: %s() > ccw_blocks_perpage=%d\n",
2126                 dev->name,__FUNCTION__,
2127                 ccw_blocks_perpage);
2128         printk(KERN_INFO "%s: %s() > ccw_pages_required=%d\n",
2129                 dev->name,__FUNCTION__,
2130                 ccw_pages_required);
2131 #endif
2132         /*
2133          *  read and write sizes are set by 2 constants in claw.h
2134          *  4k and 32k.  Unpacked values other than 4k are not going to
2135          * provide good performance. With packing buffers support 32k
2136          * buffers are used.
2137          */
2138         if (privptr->p_env->read_size < PAGE_SIZE) {
2139             claw_reads_perpage= PAGE_SIZE / privptr->p_env->read_size;
2140             claw_read_pages= (privptr->p_env->read_buffers +
2141                 claw_reads_perpage -1) / claw_reads_perpage;
2142          }
2143          else {       /* > or equal  */
2144             privptr->p_buff_pages_perread=
2145                 (privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
2146             claw_read_pages=
2147                 privptr->p_env->read_buffers * privptr->p_buff_pages_perread;
2148          }
2149         if (privptr->p_env->write_size < PAGE_SIZE) {
2150             claw_writes_perpage=
2151                 PAGE_SIZE / privptr->p_env->write_size;
2152             claw_write_pages=
2153                 (privptr->p_env->write_buffers + claw_writes_perpage -1) /
2154                         claw_writes_perpage;
2155
2156         }
2157         else {      /* >  or equal  */
2158             privptr->p_buff_pages_perwrite=
2159                  (privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
2160             claw_write_pages=
2161                 privptr->p_env->write_buffers * privptr->p_buff_pages_perwrite;
2162         }
2163 #ifdef DEBUGMSG
2164         if (privptr->p_env->read_size < PAGE_SIZE) {
2165             printk(KERN_INFO "%s: %s() reads_perpage=%d\n",
2166                 dev->name,__FUNCTION__,
2167                 claw_reads_perpage);
2168         }
2169         else {
2170             printk(KERN_INFO "%s: %s() pages_perread=%d\n",
2171                 dev->name,__FUNCTION__,
2172                 privptr->p_buff_pages_perread);
2173         }
2174         printk(KERN_INFO "%s: %s() read_pages=%d\n",
2175                 dev->name,__FUNCTION__,
2176                 claw_read_pages);
2177         if (privptr->p_env->write_size < PAGE_SIZE) {
2178             printk(KERN_INFO "%s: %s() writes_perpage=%d\n",
2179                 dev->name,__FUNCTION__,
2180                 claw_writes_perpage);
2181         }
2182         else {
2183             printk(KERN_INFO "%s: %s() pages_perwrite=%d\n",
2184                 dev->name,__FUNCTION__,
2185                 privptr->p_buff_pages_perwrite);
2186         }
2187         printk(KERN_INFO "%s: %s() write_pages=%d\n",
2188                 dev->name,__FUNCTION__,
2189                 claw_write_pages);
2190 #endif
2191
2192
2193         /*
2194         *               allocate ccw_pages_required
2195         */
2196         if (privptr->p_buff_ccw==NULL) {
2197                 privptr->p_buff_ccw=
2198                         (void *)__get_free_pages(__GFP_DMA,
2199                         (int)pages_to_order_of_mag(ccw_pages_required ));
2200                 if (privptr->p_buff_ccw==NULL) {
2201                         printk(KERN_INFO "%s: %s()  "
2202                                 "__get_free_pages for CCWs failed : "
2203                                 "pages is %d\n",
2204                                 dev->name,__FUNCTION__,
2205                                 ccw_pages_required );
2206 #ifdef FUNCTRACE
2207                         printk(KERN_INFO "%s: %s() > "
2208                                 "exit on line %d, rc = ENOMEM\n",
2209                                 dev->name,__FUNCTION__,
2210                                  __LINE__);
2211 #endif
2212                         return -ENOMEM;
2213                 }
2214                 privptr->p_buff_ccw_num=ccw_pages_required;
2215         }
2216         memset(privptr->p_buff_ccw, 0x00,
2217                 privptr->p_buff_ccw_num * PAGE_SIZE);
2218
2219         /*
2220         *               obtain ending ccw block address
2221         *
2222         */
2223         privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
2224         real_address  = (__u32)__pa(privptr->p_end_ccw);
2225         /*                              Initialize ending CCW block       */
2226 #ifdef DEBUGMSG
2227         printk(KERN_INFO "%s: %s() begin initialize ending CCW blocks\n",
2228                 dev->name,__FUNCTION__);
2229 #endif
2230
2231         p_endccw=privptr->p_end_ccw;
2232         p_endccw->real=real_address;
2233         p_endccw->write1=0x00;
2234         p_endccw->read1=0x00;
2235
2236         /*      write1_nop1                                     */
2237         p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2238         p_endccw->write1_nop1.flags       = CCW_FLAG_SLI | CCW_FLAG_CC;
2239         p_endccw->write1_nop1.count       = 1;
2240         p_endccw->write1_nop1.cda         = 0;
2241
2242         /*      write1_nop2                                     */
2243         p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2244         p_endccw->write1_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2245         p_endccw->write1_nop2.count      = 1;
2246         p_endccw->write1_nop2.cda        = 0;
2247
2248         /*      write2_nop1                                     */
2249         p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2250         p_endccw->write2_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
2251         p_endccw->write2_nop1.count        = 1;
2252         p_endccw->write2_nop1.cda          = 0;
2253
2254         /*      write2_nop2                                     */
2255         p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2256         p_endccw->write2_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2257         p_endccw->write2_nop2.count        = 1;
2258         p_endccw->write2_nop2.cda          = 0;
2259
2260         /*      read1_nop1                                      */
2261         p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2262         p_endccw->read1_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
2263         p_endccw->read1_nop1.count        = 1;
2264         p_endccw->read1_nop1.cda          = 0;
2265
2266         /*      read1_nop2                                      */
2267         p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2268         p_endccw->read1_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2269         p_endccw->read1_nop2.count        = 1;
2270         p_endccw->read1_nop2.cda          = 0;
2271
2272         /*      read2_nop1                                      */
2273         p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2274         p_endccw->read2_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
2275         p_endccw->read2_nop1.count        = 1;
2276         p_endccw->read2_nop1.cda          = 0;
2277
2278         /*      read2_nop2                                      */
2279         p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2280         p_endccw->read2_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2281         p_endccw->read2_nop2.count        = 1;
2282         p_endccw->read2_nop2.cda          = 0;
2283
2284 #ifdef IOTRACE
2285         printk(KERN_INFO "%s: %s() dump claw ending CCW BK \n",
2286                 dev->name,__FUNCTION__);
2287         dumpit((char *)p_endccw, sizeof(struct endccw));
2288 #endif
2289
2290         /*
2291         *                               Build a chain of CCWs
2292         *
2293         */
2294
2295 #ifdef DEBUGMSG
2296         printk(KERN_INFO "%s: %s()  Begin build a chain of CCW buffer \n",
2297                 dev->name,__FUNCTION__);
2298 #endif
2299         p_buff=privptr->p_buff_ccw;
2300
2301         p_free_chain=NULL;
2302         for (i=0 ; i < ccw_pages_required; i++ ) {
2303                 real_address  = (__u32)__pa(p_buff);
2304                 p_buf=p_buff;
2305                 for (j=0 ; j < ccw_blocks_perpage ; j++) {
2306                         p_buf->next  = p_free_chain;
2307                         p_free_chain = p_buf;
2308                         p_buf->real=(__u32)__pa(p_buf);
2309                         ++p_buf;
2310                 }
2311                 p_buff+=PAGE_SIZE;
2312         }
2313 #ifdef DEBUGMSG
2314         printk(KERN_INFO "%s: %s() "
2315                 "End build a chain of CCW buffer \n",
2316                         dev->name,__FUNCTION__);
2317         p_buf=p_free_chain;
2318         while (p_buf!=NULL) {
2319                 dumpit((char *)p_buf, sizeof(struct ccwbk));
2320                 p_buf=p_buf->next;
2321         }
2322 #endif
2323
2324         /*
2325         *                               Initialize ClawSignalBlock
2326         *
2327         */
2328 #ifdef DEBUGMSG
2329         printk(KERN_INFO "%s: %s() "
2330                 "Begin initialize ClawSignalBlock \n",
2331                 dev->name,__FUNCTION__);
2332 #endif
2333         if (privptr->p_claw_signal_blk==NULL) {
2334                 privptr->p_claw_signal_blk=p_free_chain;
2335                 p_free_chain=p_free_chain->next;
2336                 pClawH=(struct clawh *)privptr->p_claw_signal_blk;
2337                 pClawH->length=0xffff;
2338                 pClawH->opcode=0xff;
2339                 pClawH->flag=CLAW_BUSY;
2340         }
2341 #ifdef DEBUGMSG
2342         printk(KERN_INFO "%s: %s() >  End initialize "
2343                 "ClawSignalBlock\n",
2344                 dev->name,__FUNCTION__);
2345         dumpit((char *)privptr->p_claw_signal_blk, sizeof(struct ccwbk));
2346 #endif
2347
2348         /*
2349         *               allocate write_pages_required and add to free chain
2350         */
2351         if (privptr->p_buff_write==NULL) {
2352             if (privptr->p_env->write_size < PAGE_SIZE) {
2353                 privptr->p_buff_write=
2354                         (void *)__get_free_pages(__GFP_DMA,
2355                         (int)pages_to_order_of_mag(claw_write_pages ));
2356                 if (privptr->p_buff_write==NULL) {
2357                         printk(KERN_INFO "%s: %s() __get_free_pages for write"
2358                                 " bufs failed : get is for %d pages\n",
2359                                 dev->name,__FUNCTION__,claw_write_pages );
2360                         free_pages((unsigned long)privptr->p_buff_ccw,
2361                            (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
2362                         privptr->p_buff_ccw=NULL;
2363 #ifdef FUNCTRACE
2364                         printk(KERN_INFO "%s: %s() > exit on line %d,"
2365                                 "rc = ENOMEM\n",
2366                                 dev->name,__FUNCTION__,__LINE__);
2367 #endif
2368                         return -ENOMEM;
2369                 }
2370                 /*
2371                 *                               Build CLAW write free chain
2372                 *
2373                 */
2374
2375                 memset(privptr->p_buff_write, 0x00,
2376                         ccw_pages_required * PAGE_SIZE);
2377 #ifdef DEBUGMSG
2378                 printk(KERN_INFO "%s: %s() Begin build claw write free "
2379                         "chain \n",dev->name,__FUNCTION__);
2380 #endif
2381                 privptr->p_write_free_chain=NULL;
2382
2383                 p_buff=privptr->p_buff_write;
2384
2385                 for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
2386                         p_buf        = p_free_chain;      /*  get a CCW */
2387                         p_free_chain = p_buf->next;
2388                         p_buf->next  =privptr->p_write_free_chain;
2389                         privptr->p_write_free_chain = p_buf;
2390                         p_buf-> p_buffer        = (struct clawbuf *)p_buff;
2391                         p_buf-> write.cda       = (__u32)__pa(p_buff);
2392                         p_buf-> write.flags     = CCW_FLAG_SLI | CCW_FLAG_CC;
2393                         p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2394                         p_buf-> w_read_FF.flags   = CCW_FLAG_SLI | CCW_FLAG_CC;
2395                         p_buf-> w_read_FF.count   = 1;
2396                         p_buf-> w_read_FF.cda     =
2397                                 (__u32)__pa(&p_buf-> header.flag);
2398                         p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2399                         p_buf-> w_TIC_1.flags      = 0;
2400                         p_buf-> w_TIC_1.count      = 0;
2401
2402                         if (((unsigned long)p_buff+privptr->p_env->write_size) >=
2403                            ((unsigned long)(p_buff+2*
2404                                 (privptr->p_env->write_size) -1) & PAGE_MASK)) {
2405                         p_buff= p_buff+privptr->p_env->write_size;
2406                         }
2407                 }
2408            }
2409            else      /*  Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
2410            {
2411                privptr->p_write_free_chain=NULL;
2412                for (i = 0; i< privptr->p_env->write_buffers ; i++) {
2413                    p_buff=(void *)__get_free_pages(__GFP_DMA,
2414                         (int)pages_to_order_of_mag(
2415                         privptr->p_buff_pages_perwrite) );
2416 #ifdef IOTRACE
2417                    printk(KERN_INFO "%s:%s __get_free_pages "
2418                     "for writes buf: get for %d pages\n",
2419                     dev->name,__FUNCTION__,
2420                     privptr->p_buff_pages_perwrite);
2421 #endif
2422                    if (p_buff==NULL) {
2423                         printk(KERN_INFO "%s:%s __get_free_pages"
2424                                 "for writes buf failed : get is for %d pages\n",
2425                                 dev->name,
2426                                 __FUNCTION__,
2427                                 privptr->p_buff_pages_perwrite );
2428                         free_pages((unsigned long)privptr->p_buff_ccw,
2429                               (int)pages_to_order_of_mag(
2430                                         privptr->p_buff_ccw_num));
2431                         privptr->p_buff_ccw=NULL;
2432                         p_buf=privptr->p_buff_write;
2433                         while (p_buf!=NULL) {
2434                                 free_pages((unsigned long)
2435                                         p_buf->p_buffer,
2436                                         (int)pages_to_order_of_mag(
2437                                         privptr->p_buff_pages_perwrite));
2438                                 p_buf=p_buf->next;
2439                         }
2440 #ifdef FUNCTRACE
2441                         printk(KERN_INFO "%s: %s exit on line %d, rc = ENOMEM\n",
2442                         dev->name,
2443                         __FUNCTION__,
2444                         __LINE__);
2445 #endif
2446                         return -ENOMEM;
2447                    }  /* Error on get_pages   */
2448                    memset(p_buff, 0x00, privptr->p_env->write_size );
2449                    p_buf         = p_free_chain;
2450                    p_free_chain  = p_buf->next;
2451                    p_buf->next   = privptr->p_write_free_chain;
2452                    privptr->p_write_free_chain = p_buf;
2453                    privptr->p_buff_write = p_buf;
2454                    p_buf->p_buffer=(struct clawbuf *)p_buff;
2455                    p_buf-> write.cda     = (__u32)__pa(p_buff);
2456                    p_buf-> write.flags   = CCW_FLAG_SLI | CCW_FLAG_CC;
2457                    p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2458                    p_buf-> w_read_FF.flags    = CCW_FLAG_SLI | CCW_FLAG_CC;
2459                    p_buf-> w_read_FF.count    = 1;
2460                    p_buf-> w_read_FF.cda      =
2461                         (__u32)__pa(&p_buf-> header.flag);
2462                    p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2463                    p_buf-> w_TIC_1.flags   = 0;
2464                    p_buf-> w_TIC_1.count   = 0;
2465                }  /* for all write_buffers   */
2466
2467            }    /* else buffers are PAGE_SIZE or bigger */
2468
2469         }
2470         privptr->p_buff_write_num=claw_write_pages;
2471         privptr->write_free_count=privptr->p_env->write_buffers;
2472
2473
2474 #ifdef DEBUGMSG
2475         printk(KERN_INFO "%s:%s  End build claw write free chain \n",
2476         dev->name,__FUNCTION__);
2477         p_buf=privptr->p_write_free_chain;
2478         while (p_buf!=NULL) {
2479                 dumpit((char *)p_buf, sizeof(struct ccwbk));
2480                 p_buf=p_buf->next;
2481         }
2482 #endif
2483         /*
2484         *               allocate read_pages_required and chain to free chain
2485         */
2486         if (privptr->p_buff_read==NULL) {
2487             if (privptr->p_env->read_size < PAGE_SIZE)  {
2488                 privptr->p_buff_read=
2489                         (void *)__get_free_pages(__GFP_DMA,
2490                         (int)pages_to_order_of_mag(claw_read_pages) );
2491                 if (privptr->p_buff_read==NULL) {
2492                         printk(KERN_INFO "%s: %s() "
2493                                 "__get_free_pages for read buf failed : "
2494                                 "get is for %d pages\n",
2495                                 dev->name,__FUNCTION__,claw_read_pages );
2496                         free_pages((unsigned long)privptr->p_buff_ccw,
2497                                 (int)pages_to_order_of_mag(
2498                                         privptr->p_buff_ccw_num));
2499                         /* free the write pages size is < page size  */
2500                         free_pages((unsigned long)privptr->p_buff_write,
2501                                 (int)pages_to_order_of_mag(
2502                                 privptr->p_buff_write_num));
2503                         privptr->p_buff_ccw=NULL;
2504                         privptr->p_buff_write=NULL;
2505 #ifdef FUNCTRACE
2506                         printk(KERN_INFO "%s: %s() > exit on line %d, rc ="
2507                                 " ENOMEM\n",dev->name,__FUNCTION__,__LINE__);
2508 #endif
2509                         return -ENOMEM;
2510                 }
2511                 memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
2512                 privptr->p_buff_read_num=claw_read_pages;
2513                 /*
2514                 *                               Build CLAW read free chain
2515                 *
2516                 */
2517 #ifdef DEBUGMSG
2518                 printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
2519                         dev->name,__FUNCTION__);
2520 #endif
2521                 p_buff=privptr->p_buff_read;
2522                 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
2523                         p_buf        = p_free_chain;
2524                         p_free_chain = p_buf->next;
2525
2526                         if (p_last_CCWB==NULL) {
2527                                 p_buf->next=NULL;
2528                                 real_TIC_address=0;
2529                                 p_last_CCWB=p_buf;
2530                         }
2531                         else {
2532                                 p_buf->next=p_first_CCWB;
2533                                 real_TIC_address=
2534                                 (__u32)__pa(&p_first_CCWB -> read );
2535                         }
2536
2537                         p_first_CCWB=p_buf;
2538
2539                         p_buf->p_buffer=(struct clawbuf *)p_buff;
2540                         /*  initialize read command */
2541                         p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
2542                         p_buf-> read.cda = (__u32)__pa(p_buff);
2543                         p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2544                         p_buf-> read.count       = privptr->p_env->read_size;
2545
2546                         /*  initialize read_h command */
2547                         p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
2548                         p_buf-> read_h.cda =
2549                                 (__u32)__pa(&(p_buf->header));
2550                         p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2551                         p_buf-> read_h.count      = sizeof(struct clawh);
2552
2553                         /*  initialize Signal command */
2554                         p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
2555                         p_buf-> signal.cda =
2556                                 (__u32)__pa(&(pClawH->flag));
2557                         p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2558                         p_buf-> signal.count     = 1;
2559
2560                         /*  initialize r_TIC_1 command */
2561                         p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2562                         p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
2563                         p_buf-> r_TIC_1.flags = 0;
2564                         p_buf-> r_TIC_1.count      = 0;
2565
2566                         /*  initialize r_read_FF command */
2567                         p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2568                         p_buf-> r_read_FF.cda =
2569                                 (__u32)__pa(&(pClawH->flag));
2570                         p_buf-> r_read_FF.flags =
2571                                 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
2572                         p_buf-> r_read_FF.count    = 1;
2573
2574                         /*    initialize r_TIC_2          */
2575                         memcpy(&p_buf->r_TIC_2,
2576                                 &p_buf->r_TIC_1, sizeof(struct ccw1));
2577
2578                         /*     initialize Header     */
2579                         p_buf->header.length=0xffff;
2580                         p_buf->header.opcode=0xff;
2581                         p_buf->header.flag=CLAW_PENDING;
2582
2583                         if (((unsigned long)p_buff+privptr->p_env->read_size) >=
2584                                 ((unsigned long)(p_buff+2*(privptr->p_env->read_size) -1)
2585                                  & PAGE_MASK) ) {
2586                                 p_buff= p_buff+privptr->p_env->read_size;
2587                         }
2588                         else {
2589                                 p_buff=
2590                                 (void *)((unsigned long)
2591                                         (p_buff+2*(privptr->p_env->read_size) -1)
2592                                          & PAGE_MASK) ;
2593                         }
2594                 }   /* for read_buffers   */
2595           }         /* read_size < PAGE_SIZE  */
2596           else {  /* read Size >= PAGE_SIZE  */
2597
2598 #ifdef DEBUGMSG
2599         printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
2600                 dev->name,__FUNCTION__);
2601 #endif
2602                 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
2603                         p_buff = (void *)__get_free_pages(__GFP_DMA,
2604                                 (int)pages_to_order_of_mag(privptr->p_buff_pages_perread) );
2605                         if (p_buff==NULL) {
2606                                 printk(KERN_INFO "%s: %s() __get_free_pages for read "
2607                                         "buf failed : get is for %d pages\n",
2608                                         dev->name,__FUNCTION__,
2609                                         privptr->p_buff_pages_perread );
2610                                 free_pages((unsigned long)privptr->p_buff_ccw,
2611                                         (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
2612                                 /* free the write pages  */
2613                                 p_buf=privptr->p_buff_write;
2614                                 while (p_buf!=NULL) {
2615                                         free_pages((unsigned long)p_buf->p_buffer,
2616                                                 (int)pages_to_order_of_mag(
2617                                                 privptr->p_buff_pages_perwrite ));
2618                                         p_buf=p_buf->next;
2619                                 }
2620                                 /* free any read pages already alloc  */
2621                                 p_buf=privptr->p_buff_read;
2622                                 while (p_buf!=NULL) {
2623                                         free_pages((unsigned long)p_buf->p_buffer,
2624                                                 (int)pages_to_order_of_mag(
2625                                                 privptr->p_buff_pages_perread ));
2626                                         p_buf=p_buf->next;
2627                                 }
2628                                 privptr->p_buff_ccw=NULL;
2629                                 privptr->p_buff_write=NULL;
2630 #ifdef FUNCTRACE
2631                                 printk(KERN_INFO "%s: %s() exit on line %d, rc = ENOMEM\n",
2632                                         dev->name,__FUNCTION__,
2633                                         __LINE__);
2634 #endif
2635                                 return -ENOMEM;
2636                         }
2637                         memset(p_buff, 0x00, privptr->p_env->read_size);
2638                         p_buf        = p_free_chain;
2639                         privptr->p_buff_read = p_buf;
2640                         p_free_chain = p_buf->next;
2641
2642                         if (p_last_CCWB==NULL) {
2643                                 p_buf->next=NULL;
2644                                 real_TIC_address=0;
2645                                 p_last_CCWB=p_buf;
2646                         }
2647                         else {
2648                                 p_buf->next=p_first_CCWB;
2649                                 real_TIC_address=
2650                                         (addr_t)__pa(
2651                                                 &p_first_CCWB -> read );
2652                         }
2653
2654                         p_first_CCWB=p_buf;
2655                                 /* save buff address */
2656                         p_buf->p_buffer=(struct clawbuf *)p_buff;
2657                         /*  initialize read command */
2658                         p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
2659                         p_buf-> read.cda = (__u32)__pa(p_buff);
2660                         p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2661                         p_buf-> read.count       = privptr->p_env->read_size;
2662
2663                         /*  initialize read_h command */
2664                         p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
2665                         p_buf-> read_h.cda =
2666                                 (__u32)__pa(&(p_buf->header));
2667                         p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2668                         p_buf-> read_h.count      = sizeof(struct clawh);
2669
2670                         /*  initialize Signal command */
2671                         p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
2672                         p_buf-> signal.cda =
2673                                 (__u32)__pa(&(pClawH->flag));
2674                         p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2675                         p_buf-> signal.count     = 1;
2676
2677                         /*  initialize r_TIC_1 command */
2678                         p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2679                         p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
2680                         p_buf-> r_TIC_1.flags = 0;
2681                         p_buf-> r_TIC_1.count      = 0;
2682
2683                         /*  initialize r_read_FF command */
2684                         p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2685                         p_buf-> r_read_FF.cda =
2686                                 (__u32)__pa(&(pClawH->flag));
2687                         p_buf-> r_read_FF.flags =
2688                                 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
2689                         p_buf-> r_read_FF.count    = 1;
2690
2691                         /*    initialize r_TIC_2          */
2692                         memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
2693                                 sizeof(struct ccw1));
2694
2695                         /*     initialize Header     */
2696                         p_buf->header.length=0xffff;
2697                         p_buf->header.opcode=0xff;
2698                         p_buf->header.flag=CLAW_PENDING;
2699
2700                 }    /* For read_buffers   */
2701           }     /*  read_size >= PAGE_SIZE   */
2702         }       /*  pBuffread = NULL */
2703 #ifdef DEBUGMSG
2704         printk(KERN_INFO "%s: %s() >  End build claw read free chain \n",
2705                 dev->name,__FUNCTION__);
2706         p_buf=p_first_CCWB;
2707         while (p_buf!=NULL) {
2708                 dumpit((char *)p_buf, sizeof(struct ccwbk));
2709                 p_buf=p_buf->next;
2710         }
2711
2712 #endif
2713         add_claw_reads( dev  ,p_first_CCWB , p_last_CCWB);
2714         privptr->buffs_alloc = 1;
2715 #ifdef FUNCTRACE
2716         printk(KERN_INFO "%s: %s() exit on line %d\n",
2717                 dev->name,__FUNCTION__,__LINE__);
2718 #endif
2719         return 0;
2720 }    /*    end of init_ccw_bk */
2721
2722 /*-------------------------------------------------------------------*
2723 *                                                                    *
2724 *       probe_error                                                  *
2725 *                                                                    *
2726 *--------------------------------------------------------------------*/
2727
2728 static void
2729 probe_error( struct ccwgroup_device *cgdev)
2730 {
2731   struct claw_privbk *privptr;
2732 #ifdef FUNCTRACE
2733         printk(KERN_INFO "%s enter  \n",__FUNCTION__);
2734 #endif
2735         CLAW_DBF_TEXT(4,trace,"proberr");
2736 #ifdef DEBUGMSG
2737         printk(KERN_INFO "%s variable cgdev =\n",__FUNCTION__);
2738         dumpit((char *) cgdev, sizeof(struct ccwgroup_device));
2739 #endif
2740         privptr=(struct claw_privbk *)cgdev->dev.driver_data;
2741         if (privptr!=NULL) {
2742                 kfree(privptr->p_env);
2743                 privptr->p_env=NULL;
2744                 kfree(privptr->p_mtc_envelope);
2745                 privptr->p_mtc_envelope=NULL;
2746                 kfree(privptr);
2747                 privptr=NULL;
2748         }
2749 #ifdef FUNCTRACE
2750         printk(KERN_INFO "%s > exit on line %d\n",
2751                  __FUNCTION__,__LINE__);
2752 #endif
2753
2754         return;
2755 }    /*    probe_error    */
2756
2757
2758
2759 /*-------------------------------------------------------------------*
2760 *    claw_process_control                                            *
2761 *                                                                    *
2762 *                                                                    *
2763 *--------------------------------------------------------------------*/
2764
2765 static int
2766 claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
2767 {
2768
2769         struct clawbuf *p_buf;
2770         struct clawctl  ctlbk;
2771         struct clawctl *p_ctlbk;
2772         char    temp_host_name[8];
2773         char    temp_ws_name[8];
2774         struct claw_privbk *privptr;
2775         struct claw_env *p_env;
2776         struct sysval *p_sysval;
2777         struct conncmd *p_connect=NULL;
2778         int rc;
2779         struct chbk *p_ch = NULL;
2780 #ifdef FUNCTRACE
2781         printk(KERN_INFO "%s: %s() > enter  \n",
2782                 dev->name,__FUNCTION__);
2783 #endif
2784         CLAW_DBF_TEXT(2,setup,"clw_cntl");
2785 #ifdef DEBUGMSG
2786         printk(KERN_INFO "%s: variable dev =\n",dev->name);
2787         dumpit((char *) dev, sizeof(struct net_device));
2788         printk(KERN_INFO "%s: variable p_ccw =\n",dev->name);
2789         dumpit((char *) p_ccw, sizeof(struct ccwbk *));
2790 #endif
2791         udelay(1000);  /* Wait a ms for the control packets to
2792                         *catch up to each other */
2793         privptr=dev->priv;
2794         p_env=privptr->p_env;
2795         memcpy( &temp_host_name, p_env->host_name, 8);
2796         memcpy( &temp_ws_name, p_env->adapter_name , 8);
2797         printk(KERN_INFO "%s: CLAW device %.8s: "
2798                 "Received Control Packet\n",
2799                 dev->name, temp_ws_name);
2800         if (privptr->release_pend==1) {
2801 #ifdef FUNCTRACE
2802                 printk(KERN_INFO "%s: %s() > "
2803                         "exit on line %d, rc=0\n",
2804                         dev->name,__FUNCTION__,__LINE__);
2805 #endif
2806                 return 0;
2807         }
2808         p_buf=p_ccw->p_buffer;
2809         p_ctlbk=&ctlbk;
2810         if (p_env->packing == DO_PACKED) { /* packing in progress?*/
2811                 memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
2812         } else {
2813                 memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
2814         }
2815 #ifdef IOTRACE
2816         printk(KERN_INFO "%s: dump claw control data inbound\n",dev->name);
2817         dumpit((char *)p_ctlbk, sizeof(struct clawctl));
2818 #endif
2819         switch (p_ctlbk->command)
2820         {
2821                 case SYSTEM_VALIDATE_REQUEST:
2822                         if (p_ctlbk->version!=CLAW_VERSION_ID) {
2823                                 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2824                                         CLAW_RC_WRONG_VERSION );
2825                                 printk("%s: %d is wrong version id. "
2826                                         "Expected %d\n",
2827                                         dev->name, p_ctlbk->version,
2828                                         CLAW_VERSION_ID);
2829                         }
2830                         p_sysval=(struct sysval *)&(p_ctlbk->data);
2831                         printk( "%s: Recv Sys Validate Request: "
2832                                 "Vers=%d,link_id=%d,Corr=%d,WS name=%."
2833                                 "8s,Host name=%.8s\n",
2834                                 dev->name, p_ctlbk->version,
2835                                 p_ctlbk->linkid,
2836                                 p_ctlbk->correlator,
2837                                 p_sysval->WS_name,
2838                                 p_sysval->host_name);
2839                         if (0!=memcmp(temp_host_name,p_sysval->host_name,8)) {
2840                                 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2841                                         CLAW_RC_NAME_MISMATCH );
2842                                 CLAW_DBF_TEXT(2,setup,"HSTBAD");
2843                                 CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->host_name);
2844                                 CLAW_DBF_TEXT_(2,setup,"%s",temp_host_name);
2845                                 printk(KERN_INFO "%s:  Host name mismatch\n",
2846                                         dev->name);
2847                                 printk(KERN_INFO "%s: Received :%s: "
2848                                         "expected :%s: \n",
2849                                         dev->name,
2850                                         p_sysval->host_name,
2851                                         temp_host_name);
2852                         }
2853                         if (0!=memcmp(temp_ws_name,p_sysval->WS_name,8)) {
2854                                 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2855                                         CLAW_RC_NAME_MISMATCH );
2856                                 CLAW_DBF_TEXT(2,setup,"WSNBAD");
2857                                 CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->WS_name);
2858                                 CLAW_DBF_TEXT_(2,setup,"%s",temp_ws_name);
2859                                 printk(KERN_INFO "%s: WS name mismatch\n",
2860                                         dev->name);
2861                                  printk(KERN_INFO "%s: Received :%s: "
2862                                         "expected :%s: \n",
2863                                         dev->name,
2864                                         p_sysval->WS_name,
2865                                         temp_ws_name);
2866                         }
2867                         if (( p_sysval->write_frame_size < p_env->write_size) &&
2868                            ( p_env->packing == 0)) {
2869                                 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2870                                         CLAW_RC_HOST_RCV_TOO_SMALL );
2871                                 printk(KERN_INFO "%s: host write size is too "
2872                                         "small\n", dev->name);
2873                                 CLAW_DBF_TEXT(2,setup,"wrtszbad");
2874                         }
2875                         if (( p_sysval->read_frame_size < p_env->read_size) &&
2876                            ( p_env->packing == 0)) {
2877                                 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2878                                         CLAW_RC_HOST_RCV_TOO_SMALL );
2879                                 printk(KERN_INFO "%s: host read size is too "
2880                                         "small\n", dev->name);
2881                                 CLAW_DBF_TEXT(2,setup,"rdsizbad");
2882                         }
2883                         claw_snd_sys_validate_rsp(dev, p_ctlbk, 0 );
2884                         printk("%s: CLAW device %.8s: System validate"
2885                                 " completed.\n",dev->name, temp_ws_name);
2886                         printk("%s: sys Validate Rsize:%d Wsize:%d\n",dev->name,
2887                                 p_sysval->read_frame_size,p_sysval->write_frame_size);
2888                         privptr->system_validate_comp=1;
2889                         if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
2890                                 p_env->packing = PACKING_ASK;
2891                         }
2892                         claw_strt_conn_req(dev);
2893                         break;
2894
2895                 case SYSTEM_VALIDATE_RESPONSE:
2896                         p_sysval=(struct sysval *)&(p_ctlbk->data);
2897                         printk("%s: Recv Sys Validate Resp: Vers=%d,Corr=%d,RC=%d,"
2898                                 "WS name=%.8s,Host name=%.8s\n",
2899                                 dev->name,
2900                                 p_ctlbk->version,
2901                                 p_ctlbk->correlator,
2902                                 p_ctlbk->rc,
2903                                 p_sysval->WS_name,
2904                                 p_sysval->host_name);
2905                         switch (p_ctlbk->rc)
2906                         {
2907                                 case 0:
2908                                         printk(KERN_INFO "%s: CLAW device "
2909                                                 "%.8s: System validate "
2910                                                 "completed.\n",
2911                                                 dev->name, temp_ws_name);
2912                                         if (privptr->system_validate_comp == 0)
2913                                                 claw_strt_conn_req(dev);
2914                                         privptr->system_validate_comp=1;
2915                                         break;
2916                                 case CLAW_RC_NAME_MISMATCH:
2917                                         printk(KERN_INFO "%s: Sys Validate "
2918                                                 "Resp : Host, WS name is "
2919                                                 "mismatch\n",
2920                                                 dev->name);
2921                                         break;
2922                                 case CLAW_RC_WRONG_VERSION:
2923                                         printk(KERN_INFO "%s: Sys Validate "
2924                                                 "Resp : Wrong version\n",
2925                                                 dev->name);
2926                                         break;
2927                                 case CLAW_RC_HOST_RCV_TOO_SMALL:
2928                                         printk(KERN_INFO "%s: Sys Validate "
2929                                                 "Resp : bad frame size\n",
2930                                                 dev->name);
2931                                         break;
2932                                 default:
2933                                         printk(KERN_INFO "%s: Sys Validate "
2934                                                 "error code=%d \n",
2935                                                  dev->name, p_ctlbk->rc );
2936                                         break;
2937                         }
2938                         break;
2939
2940                 case CONNECTION_REQUEST:
2941                         p_connect=(struct conncmd *)&(p_ctlbk->data);
2942                         printk(KERN_INFO "%s: Recv Conn Req: Vers=%d,link_id=%d,"
2943                                 "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
2944                                 dev->name,
2945                                 p_ctlbk->version,
2946                                 p_ctlbk->linkid,
2947                                 p_ctlbk->correlator,
2948                                 p_connect->host_name,
2949                                 p_connect->WS_name);
2950                         if (privptr->active_link_ID!=0 ) {
2951                                 claw_snd_disc(dev, p_ctlbk);
2952                                 printk(KERN_INFO "%s: Conn Req error : "
2953                                         "already logical link is active \n",
2954                                         dev->name);
2955                         }
2956                         if (p_ctlbk->linkid!=1 ) {
2957                                 claw_snd_disc(dev, p_ctlbk);
2958                                 printk(KERN_INFO "%s: Conn Req error : "
2959                                         "req logical link id is not 1\n",
2960                                         dev->name);
2961                         }
2962                         rc=find_link(dev,
2963                                 p_connect->host_name, p_connect->WS_name);
2964                         if (rc!=0) {
2965                                 claw_snd_disc(dev, p_ctlbk);
2966                                 printk(KERN_INFO "%s: Conn Req error : "
2967                                         "req appl name does not match\n",
2968                                          dev->name);
2969                         }
2970                         claw_send_control(dev,
2971                                 CONNECTION_CONFIRM, p_ctlbk->linkid,
2972                                 p_ctlbk->correlator,
2973                                 0, p_connect->host_name,
2974                                 p_connect->WS_name);
2975                         if (p_env->packing == PACKING_ASK) {
2976                                 printk("%s: Now Pack ask\n",dev->name);
2977                                 p_env->packing = PACK_SEND;
2978                                 claw_snd_conn_req(dev,0);
2979                         }
2980                         printk(KERN_INFO "%s: CLAW device %.8s: Connection "
2981                                 "completed link_id=%d.\n",
2982                                 dev->name, temp_ws_name,
2983                                 p_ctlbk->linkid);
2984                         privptr->active_link_ID=p_ctlbk->linkid;
2985                         p_ch=&privptr->channel[WRITE];
2986                         wake_up(&p_ch->wait);  /* wake up claw_open ( WRITE) */
2987                         break;
2988                 case CONNECTION_RESPONSE:
2989                         p_connect=(struct conncmd *)&(p_ctlbk->data);
2990                         printk(KERN_INFO "%s: Revc Conn Resp: Vers=%d,link_id=%d,"
2991                                 "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
2992                                 dev->name,
2993                                 p_ctlbk->version,
2994                                 p_ctlbk->linkid,
2995                                 p_ctlbk->correlator,
2996                                 p_ctlbk->rc,
2997                                 p_connect->host_name,
2998                                 p_connect->WS_name);
2999
3000                         if (p_ctlbk->rc !=0 ) {
3001                                 printk(KERN_INFO "%s: Conn Resp error: rc=%d \n",
3002                                         dev->name, p_ctlbk->rc);
3003                                 return 1;
3004                         }
3005                         rc=find_link(dev,
3006                                 p_connect->host_name, p_connect->WS_name);
3007                         if (rc!=0) {
3008                                 claw_snd_disc(dev, p_ctlbk);
3009                                 printk(KERN_INFO "%s: Conn Resp error: "
3010                                         "req appl name does not match\n",
3011                                          dev->name);
3012                         }
3013                         /* should be until CONNECTION_CONFIRM */
3014                         privptr->active_link_ID =  - (p_ctlbk->linkid);
3015                         break;
3016                 case CONNECTION_CONFIRM:
3017                         p_connect=(struct conncmd *)&(p_ctlbk->data);
3018                         printk(KERN_INFO "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
3019                                 "Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
3020                         dev->name,
3021                         p_ctlbk->version,
3022                         p_ctlbk->linkid,
3023                         p_ctlbk->correlator,
3024                         p_connect->host_name,
3025                         p_connect->WS_name);
3026                         if (p_ctlbk->linkid== -(privptr->active_link_ID)) {
3027                                 privptr->active_link_ID=p_ctlbk->linkid;
3028                                 if (p_env->packing > PACKING_ASK) {
3029                                         printk(KERN_INFO "%s: Confirmed Now packing\n",dev->name);
3030                                         p_env->packing = DO_PACKED;
3031                                         }
3032                                 p_ch=&privptr->channel[WRITE];
3033                                 wake_up(&p_ch->wait);
3034                         }
3035                         else {
3036                                 printk(KERN_INFO "%s: Conn confirm: "
3037                                         "unexpected linkid=%d \n",
3038                                         dev->name, p_ctlbk->linkid);
3039                                 claw_snd_disc(dev, p_ctlbk);
3040                         }
3041                         break;
3042                 case DISCONNECT:
3043                         printk(KERN_INFO "%s: Disconnect: "
3044                                 "Vers=%d,link_id=%d,Corr=%d\n",
3045                                 dev->name, p_ctlbk->version,
3046                                 p_ctlbk->linkid, p_ctlbk->correlator);
3047                         if ((p_ctlbk->linkid == 2) &&
3048                             (p_env->packing == PACK_SEND)) {
3049                                 privptr->active_link_ID = 1;
3050                                 p_env->packing = DO_PACKED;
3051                         }
3052                         else
3053                                 privptr->active_link_ID=0;
3054                         break;
3055                 case CLAW_ERROR:
3056                         printk(KERN_INFO "%s: CLAW ERROR detected\n",
3057                                 dev->name);
3058                         break;
3059                 default:
3060                         printk(KERN_INFO "%s:  Unexpected command code=%d \n",
3061                                 dev->name,  p_ctlbk->command);
3062                         break;
3063         }
3064
3065 #ifdef FUNCTRACE
3066         printk(KERN_INFO "%s: %s() exit on line %d, rc = 0\n",
3067                 dev->name,__FUNCTION__,__LINE__);
3068 #endif
3069
3070         return 0;
3071 }   /*    end of claw_process_control    */
3072
3073
3074 /*-------------------------------------------------------------------*
3075 *               claw_send_control                                    *
3076 *                                                                    *
3077 *--------------------------------------------------------------------*/
3078
3079 static int
3080 claw_send_control(struct net_device *dev, __u8 type, __u8 link,
3081          __u8 correlator, __u8 rc, char *local_name, char *remote_name)
3082 {
3083         struct claw_privbk              *privptr;
3084         struct clawctl                  *p_ctl;
3085         struct sysval                   *p_sysval;
3086         struct conncmd                  *p_connect;
3087         struct sk_buff                  *skb;
3088
3089 #ifdef FUNCTRACE
3090         printk(KERN_INFO "%s:%s > enter  \n",dev->name,__FUNCTION__);
3091 #endif
3092         CLAW_DBF_TEXT(2,setup,"sndcntl");
3093 #ifdef DEBUGMSG
3094         printk(KERN_INFO "%s: Sending Control Packet \n",dev->name);
3095         printk(KERN_INFO "%s: variable type = 0x%X, link = "
3096                 "%d, correlator = %d, rc = %d\n",
3097                 dev->name,type, link, correlator, rc);
3098         printk(KERN_INFO "%s: variable local_name = %s, "
3099                 "remote_name = %s\n",dev->name, local_name, remote_name);
3100 #endif
3101         privptr=dev->priv;
3102         p_ctl=(struct clawctl *)&privptr->ctl_bk;
3103
3104         p_ctl->command=type;
3105         p_ctl->version=CLAW_VERSION_ID;
3106         p_ctl->linkid=link;
3107         p_ctl->correlator=correlator;
3108         p_ctl->rc=rc;
3109
3110         p_sysval=(struct sysval *)&p_ctl->data;
3111         p_connect=(struct conncmd *)&p_ctl->data;
3112
3113         switch (p_ctl->command) {
3114                 case SYSTEM_VALIDATE_REQUEST:
3115                 case SYSTEM_VALIDATE_RESPONSE:
3116                         memcpy(&p_sysval->host_name, local_name, 8);
3117                         memcpy(&p_sysval->WS_name, remote_name, 8);
3118                         if (privptr->p_env->packing > 0) {
3119                                 p_sysval->read_frame_size=DEF_PACK_BUFSIZE;
3120                                 p_sysval->write_frame_size=DEF_PACK_BUFSIZE;
3121                         } else {
3122                                 /* how big is the piggest group of packets */
3123                                 p_sysval->read_frame_size=privptr->p_env->read_size;
3124                                 p_sysval->write_frame_size=privptr->p_env->write_size;
3125                         }
3126                         memset(&p_sysval->reserved, 0x00, 4);
3127                         break;
3128                 case CONNECTION_REQUEST:
3129                 case CONNECTION_RESPONSE:
3130                 case CONNECTION_CONFIRM:
3131                 case DISCONNECT:
3132                         memcpy(&p_sysval->host_name, local_name, 8);
3133                         memcpy(&p_sysval->WS_name, remote_name, 8);
3134                         if (privptr->p_env->packing > 0) {
3135                         /* How big is the biggest packet */
3136                                 p_connect->reserved1[0]=CLAW_FRAME_SIZE;
3137                                 p_connect->reserved1[1]=CLAW_FRAME_SIZE;
3138                         } else {
3139                                 memset(&p_connect->reserved1, 0x00, 4);
3140                                 memset(&p_connect->reserved2, 0x00, 4);
3141                         }
3142                         break;
3143                 default:
3144                         break;
3145         }
3146
3147         /*      write Control Record to the device                   */
3148
3149
3150         skb = dev_alloc_skb(sizeof(struct clawctl));
3151         if (!skb) {
3152                 printk(  "%s:%s low on mem, returning...\n",
3153                         dev->name,__FUNCTION__);
3154 #ifdef DEBUG
3155                 printk(KERN_INFO "%s:%s Exit, rc = ENOMEM\n",
3156                         dev->name,__FUNCTION__);
3157 #endif
3158                 return -ENOMEM;
3159         }
3160         memcpy(skb_put(skb, sizeof(struct clawctl)),
3161                 p_ctl, sizeof(struct clawctl));
3162 #ifdef IOTRACE
3163          printk(KERN_INFO "%s: outbnd claw cntl data \n",dev->name);
3164         dumpit((char *)p_ctl,sizeof(struct clawctl));
3165 #endif
3166         if (privptr->p_env->packing >= PACK_SEND)
3167                 claw_hw_tx(skb, dev, 1);
3168         else
3169                 claw_hw_tx(skb, dev, 0);
3170 #ifdef FUNCTRACE
3171         printk(KERN_INFO "%s:%s Exit on line %d\n",
3172                 dev->name,__FUNCTION__,__LINE__);
3173 #endif
3174
3175         return 0;
3176 }  /*   end of claw_send_control  */
3177
3178 /*-------------------------------------------------------------------*
3179 *               claw_snd_conn_req                                    *
3180 *                                                                    *
3181 *--------------------------------------------------------------------*/
3182 static int
3183 claw_snd_conn_req(struct net_device *dev, __u8 link)
3184 {
3185         int                rc;
3186         struct claw_privbk *privptr=dev->priv;
3187         struct clawctl     *p_ctl;
3188
3189 #ifdef FUNCTRACE
3190         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
3191 #endif
3192         CLAW_DBF_TEXT(2,setup,"snd_conn");
3193 #ifdef  DEBUGMSG
3194         printk(KERN_INFO "%s: variable link = %X, dev =\n",dev->name, link);
3195         dumpit((char *) dev, sizeof(struct net_device));
3196 #endif
3197         rc = 1;
3198         p_ctl=(struct clawctl *)&privptr->ctl_bk;
3199         p_ctl->linkid = link;
3200         if ( privptr->system_validate_comp==0x00 ) {
3201 #ifdef FUNCTRACE
3202                 printk(KERN_INFO "%s:%s Exit on line %d, rc = 1\n",
3203                         dev->name,__FUNCTION__,__LINE__);
3204 #endif
3205                 return rc;
3206         }
3207         if (privptr->p_env->packing == PACKING_ASK )
3208                 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3209                         WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
3210         if (privptr->p_env->packing == PACK_SEND)  {
3211                 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3212                         WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
3213         }
3214         if (privptr->p_env->packing == 0)
3215                 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3216                         HOST_APPL_NAME, privptr->p_env->api_type);
3217 #ifdef FUNCTRACE
3218         printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3219                 dev->name,__FUNCTION__,__LINE__, rc);
3220 #endif
3221         return rc;
3222
3223 }  /*  end of claw_snd_conn_req */
3224
3225
3226 /*-------------------------------------------------------------------*
3227 *               claw_snd_disc                                        *
3228 *                                                                    *
3229 *--------------------------------------------------------------------*/
3230
3231 static int
3232 claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
3233 {
3234         int rc;
3235         struct conncmd *  p_connect;
3236
3237 #ifdef FUNCTRACE
3238         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3239 #endif
3240         CLAW_DBF_TEXT(2,setup,"snd_dsc");
3241 #ifdef  DEBUGMSG
3242         printk(KERN_INFO "%s: variable dev =\n",dev->name);
3243         dumpit((char *) dev, sizeof(struct net_device));
3244         printk(KERN_INFO "%s: variable p_ctl",dev->name);
3245         dumpit((char *) p_ctl, sizeof(struct clawctl));
3246 #endif
3247         p_connect=(struct conncmd *)&p_ctl->data;
3248
3249         rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
3250                 p_ctl->correlator, 0,
3251                 p_connect->host_name, p_connect->WS_name);
3252 #ifdef FUNCTRACE
3253         printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3254                 dev->name,__FUNCTION__, __LINE__, rc);
3255 #endif
3256         return rc;
3257 }     /*   end of claw_snd_disc    */
3258
3259
3260 /*-------------------------------------------------------------------*
3261 *               claw_snd_sys_validate_rsp                            *
3262 *                                                                    *
3263 *--------------------------------------------------------------------*/
3264
3265 static int
3266 claw_snd_sys_validate_rsp(struct net_device *dev,
3267         struct clawctl *p_ctl, __u32 return_code)
3268 {
3269         struct claw_env *  p_env;
3270         struct claw_privbk *privptr;
3271         int    rc;
3272
3273 #ifdef FUNCTRACE
3274         printk(KERN_INFO "%s:%s Enter\n",
3275                 dev->name,__FUNCTION__);
3276 #endif
3277         CLAW_DBF_TEXT(2,setup,"chkresp");
3278 #ifdef DEBUGMSG
3279         printk(KERN_INFO "%s: variable return_code = %d, dev =\n",
3280                 dev->name, return_code);
3281         dumpit((char *) dev, sizeof(struct net_device));
3282         printk(KERN_INFO "%s: variable p_ctl =\n",dev->name);
3283         dumpit((char *) p_ctl, sizeof(struct clawctl));
3284 #endif
3285         privptr = dev->priv;
3286         p_env=privptr->p_env;
3287         rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
3288                 p_ctl->linkid,
3289                 p_ctl->correlator,
3290                 return_code,
3291                 p_env->host_name,
3292                 p_env->adapter_name  );
3293 #ifdef FUNCTRACE
3294         printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3295                 dev->name,__FUNCTION__,__LINE__, rc);
3296 #endif
3297         return rc;
3298 }     /*    end of claw_snd_sys_validate_rsp    */
3299
3300 /*-------------------------------------------------------------------*
3301 *               claw_strt_conn_req                                   *
3302 *                                                                    *
3303 *--------------------------------------------------------------------*/
3304
3305 static int
3306 claw_strt_conn_req(struct net_device *dev )
3307 {
3308         int rc;
3309
3310 #ifdef FUNCTRACE
3311         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3312 #endif
3313         CLAW_DBF_TEXT(2,setup,"conn_req");
3314 #ifdef DEBUGMSG
3315         printk(KERN_INFO "%s: variable dev =\n",dev->name);
3316         dumpit((char *) dev, sizeof(struct net_device));
3317 #endif
3318         rc=claw_snd_conn_req(dev, 1);
3319 #ifdef FUNCTRACE
3320         printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3321                 dev->name,__FUNCTION__,__LINE__, rc);
3322 #endif
3323         return rc;
3324 }    /*   end of claw_strt_conn_req   */
3325
3326
3327
3328 /*-------------------------------------------------------------------*
3329  *   claw_stats                                                      *
3330  *-------------------------------------------------------------------*/
3331
3332 static struct
3333 net_device_stats *claw_stats(struct net_device *dev)
3334 {
3335         struct claw_privbk *privptr;
3336 #ifdef FUNCTRACE
3337         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3338 #endif
3339         CLAW_DBF_TEXT(4,trace,"stats");
3340         privptr = dev->priv;
3341 #ifdef FUNCTRACE
3342         printk(KERN_INFO "%s:%s Exit on line %d\n",
3343                 dev->name,__FUNCTION__,__LINE__);
3344 #endif
3345         return &privptr->stats;
3346 }     /*   end of claw_stats   */
3347
3348
3349 /*-------------------------------------------------------------------*
3350 *       unpack_read                                                  *
3351 *                                                                    *
3352 *--------------------------------------------------------------------*/
3353 static void
3354 unpack_read(struct net_device *dev )
3355 {
3356         struct sk_buff *skb;
3357         struct claw_privbk *privptr;
3358         struct claw_env    *p_env;
3359         struct ccwbk    *p_this_ccw;
3360         struct ccwbk    *p_first_ccw;
3361         struct ccwbk    *p_last_ccw;
3362         struct clawph   *p_packh;
3363         void            *p_packd;
3364         struct clawctl  *p_ctlrec=NULL;
3365
3366         __u32   len_of_data;
3367         __u32   pack_off;
3368         __u8    link_num;
3369         __u8    mtc_this_frm=0;
3370         __u32   bytes_to_mov;
3371         struct chbk *p_ch = NULL;
3372         int     i=0;
3373         int     p=0;
3374
3375 #ifdef FUNCTRACE
3376         printk(KERN_INFO "%s:%s enter  \n",dev->name,__FUNCTION__);
3377 #endif
3378         CLAW_DBF_TEXT(4,trace,"unpkread");
3379         p_first_ccw=NULL;
3380         p_last_ccw=NULL;
3381         p_packh=NULL;
3382         p_packd=NULL;
3383         privptr=dev->priv;
3384         p_env = privptr->p_env;
3385         p_this_ccw=privptr->p_read_active_first;
3386         i=0;
3387         while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
3388 #ifdef IOTRACE
3389                 printk(KERN_INFO "%s p_this_ccw \n",dev->name);
3390                 dumpit((char*)p_this_ccw, sizeof(struct ccwbk));
3391                 printk(KERN_INFO "%s Inbound p_this_ccw->p_buffer(64)"
3392                         " pk=%d \n",dev->name,p_env->packing);
3393                 dumpit((char *)p_this_ccw->p_buffer, 64 );
3394 #endif
3395                 pack_off = 0;
3396                 p = 0;
3397                 p_this_ccw->header.flag=CLAW_PENDING;
3398                 privptr->p_read_active_first=p_this_ccw->next;
3399                 p_this_ccw->next=NULL;
3400                 p_packh = (struct clawph *)p_this_ccw->p_buffer;
3401                 if ((p_env->packing == PACK_SEND) &&
3402                     (p_packh->len == 32)           &&
3403                     (p_packh->link_num == 0)) {   /* is it a packed ctl rec? */
3404                         p_packh++;  /* peek past pack header */
3405                         p_ctlrec = (struct clawctl *)p_packh;
3406                         p_packh--;  /* un peek */
3407                         if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
3408                             (p_ctlrec->command == CONNECTION_CONFIRM))
3409                                 p_env->packing = DO_PACKED;
3410                 }
3411                 if (p_env->packing == DO_PACKED)
3412                         link_num=p_packh->link_num;
3413                 else
3414                         link_num=p_this_ccw->header.opcode / 8;
3415                 if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
3416 #ifdef DEBUGMSG
3417                         printk(KERN_INFO "%s: %s > More_to_come is ON\n",
3418                         dev->name,__FUNCTION__);
3419 #endif
3420                         mtc_this_frm=1;
3421                         if (p_this_ccw->header.length!=
3422                                 privptr->p_env->read_size ) {
3423                                 printk(KERN_INFO " %s: Invalid frame detected "
3424                                         "length is %02x\n" ,
3425                                         dev->name, p_this_ccw->header.length);
3426                         }
3427                 }
3428
3429                 if (privptr->mtc_skipping) {
3430                         /*
3431                         *   We're in the mode of skipping past a
3432                         *   multi-frame message
3433                         *   that we can't process for some reason or other.
3434                         *   The first frame without the More-To-Come flag is
3435                         *   the last frame of the skipped message.
3436                         */
3437                         /*  in case of More-To-Come not set in this frame */
3438                         if (mtc_this_frm==0) {
3439                                 privptr->mtc_skipping=0; /* Ok, the end */
3440                                 privptr->mtc_logical_link=-1;
3441                         }
3442 #ifdef DEBUGMSG
3443                         printk(KERN_INFO "%s:%s goto next "
3444                                 "frame from MoretoComeSkip \n",
3445                                 dev->name,__FUNCTION__);
3446 #endif
3447                         goto NextFrame;
3448                 }
3449
3450                 if (link_num==0) {
3451                         claw_process_control(dev, p_this_ccw);
3452 #ifdef DEBUGMSG
3453                         printk(KERN_INFO "%s:%s goto next "
3454                                 "frame from claw_process_control \n",
3455                                 dev->name,__FUNCTION__);
3456 #endif
3457                         CLAW_DBF_TEXT(4,trace,"UnpkCntl");
3458                         goto NextFrame;
3459                 }
3460 unpack_next:
3461                 if (p_env->packing == DO_PACKED) {
3462                         if (pack_off > p_env->read_size)
3463                                 goto NextFrame;
3464                         p_packd = p_this_ccw->p_buffer+pack_off;
3465                         p_packh = (struct clawph *) p_packd;
3466                         if ((p_packh->len == 0) || /* all done with this frame? */
3467                             (p_packh->flag != 0))
3468                                 goto NextFrame;
3469                         bytes_to_mov = p_packh->len;
3470                         pack_off += bytes_to_mov+sizeof(struct clawph);
3471                         p++;
3472                 } else {
3473                         bytes_to_mov=p_this_ccw->header.length;
3474                 }
3475                 if (privptr->mtc_logical_link<0) {
3476 #ifdef DEBUGMSG
3477                 printk(KERN_INFO "%s: %s mtc_logical_link < 0  \n",
3478                         dev->name,__FUNCTION__);
3479 #endif
3480
3481                 /*
3482                 *  if More-To-Come is set in this frame then we don't know
3483                 *  length of entire message, and hence have to allocate
3484                 *  large buffer   */
3485
3486                 /*      We are starting a new envelope  */
3487                 privptr->mtc_offset=0;
3488                         privptr->mtc_logical_link=link_num;
3489                 }
3490
3491                 if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
3492                         /*      error     */
3493 #ifdef DEBUGMSG
3494                         printk(KERN_INFO "%s: %s > goto next "
3495                                 "frame from MoretoComeSkip \n",
3496                                 dev->name,
3497                                 __FUNCTION__);
3498                         printk(KERN_INFO "      bytes_to_mov %d > (MAX_ENVELOPE_"
3499                                 "SIZE-privptr->mtc_offset %d)\n",
3500                                 bytes_to_mov,(MAX_ENVELOPE_SIZE- privptr->mtc_offset));
3501 #endif
3502                         privptr->stats.rx_frame_errors++;
3503                         goto NextFrame;
3504                 }
3505                 if (p_env->packing == DO_PACKED) {
3506                         memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
3507                                 p_packd+sizeof(struct clawph), bytes_to_mov);
3508
3509                 } else  {
3510                         memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
3511                                 p_this_ccw->p_buffer, bytes_to_mov);
3512                 }
3513 #ifdef DEBUGMSG
3514                 printk(KERN_INFO "%s: %s() received data \n",
3515                         dev->name,__FUNCTION__);
3516                 if (p_env->packing == DO_PACKED)
3517                         dumpit((char *)p_packd+sizeof(struct clawph),32);
3518                 else
3519                         dumpit((char *)p_this_ccw->p_buffer, 32);
3520                 printk(KERN_INFO "%s: %s() bytelength %d \n",
3521                         dev->name,__FUNCTION__,bytes_to_mov);
3522 #endif
3523                 if (mtc_this_frm==0) {
3524                         len_of_data=privptr->mtc_offset+bytes_to_mov;
3525                         skb=dev_alloc_skb(len_of_data);
3526                         if (skb) {
3527                                 memcpy(skb_put(skb,len_of_data),
3528                                         privptr->p_mtc_envelope,
3529                                         len_of_data);
3530                                 skb->mac.raw=skb->data;
3531                                 skb->dev=dev;
3532                                 skb->protocol=htons(ETH_P_IP);
3533                                 skb->ip_summed=CHECKSUM_UNNECESSARY;
3534                                 privptr->stats.rx_packets++;
3535                                 privptr->stats.rx_bytes+=len_of_data;
3536                                 netif_rx(skb);
3537 #ifdef DEBUGMSG
3538                                 printk(KERN_INFO "%s: %s() netif_"
3539                                         "rx(skb) completed \n",
3540                                         dev->name,__FUNCTION__);
3541 #endif
3542                         }
3543                         else {
3544                                 privptr->stats.rx_dropped++;
3545                                 printk(KERN_WARNING "%s: %s() low on memory\n",
3546                                 dev->name,__FUNCTION__);
3547                         }
3548                         privptr->mtc_offset=0;
3549                         privptr->mtc_logical_link=-1;
3550                 }
3551                 else {
3552                         privptr->mtc_offset+=bytes_to_mov;
3553                 }
3554                 if (p_env->packing == DO_PACKED)
3555                         goto unpack_next;
3556 NextFrame:
3557                 /*
3558                 *   Remove ThisCCWblock from active read queue, and add it
3559                 *   to queue of free blocks to be reused.
3560                 */
3561                 i++;
3562                 p_this_ccw->header.length=0xffff;
3563                 p_this_ccw->header.opcode=0xff;
3564                 /*
3565                 *       add this one to the free queue for later reuse
3566                 */
3567                 if (p_first_ccw==NULL) {
3568                         p_first_ccw = p_this_ccw;
3569                 }
3570                 else {
3571                         p_last_ccw->next = p_this_ccw;
3572                 }
3573                 p_last_ccw = p_this_ccw;
3574                 /*
3575                 *       chain to next block on active read queue
3576                 */
3577                 p_this_ccw = privptr->p_read_active_first;
3578                 CLAW_DBF_TEXT_(4,trace,"rxpkt %d",p);
3579         } /* end of while */
3580
3581         /*      check validity                  */
3582
3583 #ifdef IOTRACE
3584         printk(KERN_INFO "%s:%s processed frame is %d \n",
3585                 dev->name,__FUNCTION__,i);
3586         printk(KERN_INFO "%s:%s  F:%lx L:%lx\n",
3587                 dev->name,
3588                 __FUNCTION__,
3589                 (unsigned long)p_first_ccw,
3590                 (unsigned long)p_last_ccw);
3591 #endif
3592         CLAW_DBF_TEXT_(4,trace,"rxfrm %d",i);
3593         add_claw_reads(dev, p_first_ccw, p_last_ccw);
3594         p_ch=&privptr->channel[READ];
3595         claw_strt_read(dev, LOCK_YES);
3596 #ifdef FUNCTRACE
3597         printk(KERN_INFO "%s: %s exit on line %d\n",
3598                 dev->name, __FUNCTION__, __LINE__);
3599 #endif
3600         return;
3601 }     /*  end of unpack_read   */
3602
3603 /*-------------------------------------------------------------------*
3604 *       claw_strt_read                                               *
3605 *                                                                    *
3606 *--------------------------------------------------------------------*/
3607 static void
3608 claw_strt_read (struct net_device *dev, int lock )
3609 {
3610         int        rc = 0;
3611         __u32      parm;
3612         unsigned long  saveflags = 0;
3613         struct claw_privbk *privptr=dev->priv;
3614         struct ccwbk*p_ccwbk;
3615         struct chbk *p_ch;
3616         struct clawh *p_clawh;
3617         p_ch=&privptr->channel[READ];
3618
3619 #ifdef FUNCTRACE
3620         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
3621         printk(KERN_INFO "%s: variable lock = %d, dev =\n",dev->name, lock);
3622         dumpit((char *) dev, sizeof(struct net_device));
3623 #endif
3624         CLAW_DBF_TEXT(4,trace,"StRdNter");
3625         p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
3626         p_clawh->flag=CLAW_IDLE;    /* 0x00 */
3627
3628         if ((privptr->p_write_active_first!=NULL &&
3629              privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
3630             (privptr->p_read_active_first!=NULL &&
3631              privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
3632                 p_clawh->flag=CLAW_BUSY;    /* 0xff */
3633         }
3634 #ifdef DEBUGMSG
3635         printk(KERN_INFO "%s:%s state-%02x\n" ,
3636                 dev->name,__FUNCTION__, p_ch->claw_state);
3637 #endif
3638         if (lock==LOCK_YES) {
3639                 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
3640         }
3641         if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
3642 #ifdef DEBUGMSG
3643                 printk(KERN_INFO "%s: HOT READ started in %s\n" ,
3644                         dev->name,__FUNCTION__);
3645                 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
3646                 dumpit((char *)&p_clawh->flag , 1);
3647 #endif
3648                 CLAW_DBF_TEXT(4,trace,"HotRead");
3649                 p_ccwbk=privptr->p_read_active_first;
3650                 parm = (unsigned long) p_ch;
3651                 rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
3652                                        0xff, 0);
3653                 if (rc != 0) {
3654                         ccw_check_return_code(p_ch->cdev, rc);
3655                 }
3656         }
3657         else {
3658 #ifdef DEBUGMSG
3659                 printk(KERN_INFO "%s: No READ started by %s() In progress\n" ,
3660                         dev->name,__FUNCTION__);
3661 #endif
3662                 CLAW_DBF_TEXT(2,trace,"ReadAct");
3663         }
3664
3665         if (lock==LOCK_YES) {
3666                 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
3667         }
3668 #ifdef FUNCTRACE
3669         printk(KERN_INFO "%s:%s Exit on line %d\n",
3670                 dev->name,__FUNCTION__,__LINE__);
3671 #endif
3672         CLAW_DBF_TEXT(4,trace,"StRdExit");
3673         return;
3674 }       /*    end of claw_strt_read    */
3675
3676 /*-------------------------------------------------------------------*
3677 *       claw_strt_out_IO                                             *
3678 *                                                                    *
3679 *--------------------------------------------------------------------*/
3680
3681 static void
3682 claw_strt_out_IO( struct net_device *dev )
3683 {
3684         int                     rc = 0;
3685         unsigned long           parm;
3686         struct claw_privbk      *privptr;
3687         struct chbk             *p_ch;
3688         struct ccwbk    *p_first_ccw;
3689
3690 #ifdef FUNCTRACE
3691         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3692 #endif
3693         if (!dev) {
3694                 return;
3695         }
3696         privptr=(struct claw_privbk *)dev->priv;
3697         p_ch=&privptr->channel[WRITE];
3698
3699 #ifdef DEBUGMSG
3700         printk(KERN_INFO "%s:%s state-%02x\n" ,
3701                 dev->name,__FUNCTION__,p_ch->claw_state);
3702 #endif
3703         CLAW_DBF_TEXT(4,trace,"strt_io");
3704         p_first_ccw=privptr->p_write_active_first;
3705
3706         if (p_ch->claw_state == CLAW_STOP)
3707                 return;
3708         if (p_first_ccw == NULL) {
3709 #ifdef FUNCTRACE
3710                 printk(KERN_INFO "%s:%s Exit on line %d\n",
3711                         dev->name,__FUNCTION__,__LINE__);
3712 #endif
3713                 return;
3714         }
3715         if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
3716                 parm = (unsigned long) p_ch;
3717 #ifdef DEBUGMSG
3718                 printk(KERN_INFO "%s:%s do_io \n" ,dev->name,__FUNCTION__);
3719                 dumpit((char *)p_first_ccw, sizeof(struct ccwbk));
3720 #endif
3721                 CLAW_DBF_TEXT(2,trace,"StWrtIO");
3722                 rc = ccw_device_start (p_ch->cdev,&p_first_ccw->write, parm,
3723                                        0xff, 0);
3724                 if (rc != 0) {
3725                         ccw_check_return_code(p_ch->cdev, rc);
3726                 }
3727         }
3728         dev->trans_start = jiffies;
3729 #ifdef FUNCTRACE
3730         printk(KERN_INFO "%s:%s Exit on line %d\n",
3731                 dev->name,__FUNCTION__,__LINE__);
3732 #endif
3733
3734         return;
3735 }       /*    end of claw_strt_out_IO    */
3736
3737 /*-------------------------------------------------------------------*
3738 *       Free write buffers                                           *
3739 *                                                                    *
3740 *--------------------------------------------------------------------*/
3741
3742 static void
3743 claw_free_wrt_buf( struct net_device *dev )
3744 {
3745
3746         struct claw_privbk *privptr=(struct claw_privbk *)dev->priv;
3747         struct ccwbk*p_first_ccw;
3748         struct ccwbk*p_last_ccw;
3749         struct ccwbk*p_this_ccw;
3750         struct ccwbk*p_next_ccw;
3751 #ifdef IOTRACE
3752         struct ccwbk*p_buf;
3753 #endif
3754 #ifdef FUNCTRACE
3755         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3756         printk(KERN_INFO "%s: free count = %d  variable dev =\n",
3757                 dev->name,privptr->write_free_count);
3758 #endif
3759         CLAW_DBF_TEXT(4,trace,"freewrtb");
3760         /*  scan the write queue to free any completed write packets   */
3761         p_first_ccw=NULL;
3762         p_last_ccw=NULL;
3763 #ifdef IOTRACE
3764         printk(KERN_INFO "%s:  Dump current CCW chain \n",dev->name  );
3765         p_buf=privptr->p_write_active_first;
3766         while (p_buf!=NULL) {
3767                 dumpit((char *)p_buf, sizeof(struct ccwbk));
3768                 p_buf=p_buf->next;
3769         }
3770         if (p_buf==NULL) {
3771                 printk(KERN_INFO "%s: privptr->p_write_"
3772                         "active_first==NULL\n",dev->name  );
3773         }
3774         p_buf=(struct ccwbk*)privptr->p_end_ccw;
3775         dumpit((char *)p_buf, sizeof(struct endccw));
3776 #endif
3777         p_this_ccw=privptr->p_write_active_first;
3778         while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
3779         {
3780                 p_next_ccw = p_this_ccw->next;
3781                 if (((p_next_ccw!=NULL) &&
3782                      (p_next_ccw->header.flag!=CLAW_PENDING)) ||
3783                     ((p_this_ccw == privptr->p_write_active_last) &&
3784                      (p_this_ccw->header.flag!=CLAW_PENDING))) {
3785                         /* The next CCW is OK or this is  */
3786                         /* the last CCW...free it   @A1A  */
3787                         privptr->p_write_active_first=p_this_ccw->next;
3788                         p_this_ccw->header.flag=CLAW_PENDING;
3789                         p_this_ccw->next=privptr->p_write_free_chain;
3790                         privptr->p_write_free_chain=p_this_ccw;
3791                         ++privptr->write_free_count;
3792                         privptr->stats.tx_bytes+= p_this_ccw->write.count;
3793                         p_this_ccw=privptr->p_write_active_first;
3794                         privptr->stats.tx_packets++;
3795                 }
3796                 else {
3797                         break;
3798                 }
3799         }
3800         if (privptr->write_free_count!=0) {
3801                 claw_clearbit_busy(TB_NOBUFFER,dev);
3802         }
3803         /*   whole chain removed?   */
3804         if (privptr->p_write_active_first==NULL) {
3805                 privptr->p_write_active_last=NULL;
3806 #ifdef DEBUGMSG
3807                 printk(KERN_INFO "%s:%s p_write_"
3808                         "active_first==NULL\n",dev->name,__FUNCTION__);
3809 #endif
3810         }
3811 #ifdef IOTRACE
3812         printk(KERN_INFO "%s: Dump arranged CCW chain \n",dev->name  );
3813         p_buf=privptr->p_write_active_first;
3814         while (p_buf!=NULL) {
3815                 dumpit((char *)p_buf, sizeof(struct ccwbk));
3816                 p_buf=p_buf->next;
3817         }
3818         if (p_buf==NULL) {
3819                 printk(KERN_INFO "%s: privptr->p_write_active_"
3820                         "first==NULL\n",dev->name  );
3821         }
3822         p_buf=(struct ccwbk*)privptr->p_end_ccw;
3823         dumpit((char *)p_buf, sizeof(struct endccw));
3824 #endif
3825
3826         CLAW_DBF_TEXT_(4,trace,"FWC=%d",privptr->write_free_count);
3827 #ifdef FUNCTRACE
3828         printk(KERN_INFO "%s:%s Exit on line %d free_count =%d\n",
3829                 dev->name,__FUNCTION__, __LINE__,privptr->write_free_count);
3830 #endif
3831         return;
3832 }
3833
3834 /*-------------------------------------------------------------------*
3835 *       claw free netdevice                                          *
3836 *                                                                    *
3837 *--------------------------------------------------------------------*/
3838 static void
3839 claw_free_netdevice(struct net_device * dev, int free_dev)
3840 {
3841         struct claw_privbk *privptr;
3842 #ifdef FUNCTRACE
3843         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3844 #endif
3845         CLAW_DBF_TEXT(2,setup,"free_dev");
3846
3847         if (!dev)
3848                 return;
3849         CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
3850         privptr = dev->priv;
3851         if (dev->flags & IFF_RUNNING)
3852                 claw_release(dev);
3853         if (privptr) {
3854                 privptr->channel[READ].ndev = NULL;  /* say it's free */
3855         }
3856         dev->priv=NULL;
3857 #ifdef MODULE
3858         if (free_dev) {
3859                 free_netdev(dev);
3860         }
3861 #endif
3862         CLAW_DBF_TEXT(2,setup,"feee_ok");
3863 #ifdef FUNCTRACE
3864         printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
3865 #endif
3866 }
3867
3868 /**
3869  * Claw init netdevice
3870  * Initialize everything of the net device except the name and the
3871  * channel structs.
3872  */
3873 static void
3874 claw_init_netdevice(struct net_device * dev)
3875 {
3876 #ifdef FUNCTRACE
3877         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3878 #endif
3879         CLAW_DBF_TEXT(2,setup,"init_dev");
3880         CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
3881         if (!dev) {
3882         printk(KERN_WARNING "claw:%s BAD Device exit line %d\n",
3883                 __FUNCTION__,__LINE__);
3884                 CLAW_DBF_TEXT(2,setup,"baddev");
3885                 return;
3886         }
3887         dev->mtu = CLAW_DEFAULT_MTU_SIZE;
3888         dev->hard_start_xmit = claw_tx;
3889         dev->open = claw_open;
3890         dev->stop = claw_release;
3891         dev->get_stats = claw_stats;
3892         dev->change_mtu = claw_change_mtu;
3893         dev->hard_header_len = 0;
3894         dev->addr_len = 0;
3895         dev->type = ARPHRD_SLIP;
3896         dev->tx_queue_len = 1300;
3897         dev->flags = IFF_POINTOPOINT | IFF_NOARP;
3898         SET_MODULE_OWNER(dev);
3899 #ifdef FUNCTRACE
3900         printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
3901 #endif
3902         CLAW_DBF_TEXT(2,setup,"initok");
3903         return;
3904 }
3905
3906 /**
3907  * Init a new channel in the privptr->channel[i].
3908  *
3909  * @param cdev  The ccw_device to be added.
3910  *
3911  * @return 0 on success, !0 on error.
3912  */
3913 static int
3914 add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
3915 {
3916         struct chbk *p_ch;
3917
3918 #ifdef FUNCTRACE
3919         printk(KERN_INFO "%s:%s Enter\n",cdev->dev.bus_id,__FUNCTION__);
3920 #endif
3921         CLAW_DBF_TEXT_(2,setup,"%s",cdev->dev.bus_id);
3922         privptr->channel[i].flag  = i+1;   /* Read is 1 Write is 2 */
3923         p_ch = &privptr->channel[i];
3924         p_ch->cdev = cdev;
3925         snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", cdev->dev.bus_id);
3926         sscanf(cdev->dev.bus_id+4,"%x",&p_ch->devno);
3927         if ((p_ch->irb = kmalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
3928                 printk(KERN_WARNING "%s Out of memory in %s for irb\n",
3929                         p_ch->id,__FUNCTION__);
3930 #ifdef FUNCTRACE
3931                 printk(KERN_INFO "%s:%s Exit on line %d\n",
3932                         p_ch->id,__FUNCTION__,__LINE__);
3933 #endif
3934                 return -ENOMEM;
3935         }
3936         memset(p_ch->irb, 0, sizeof (struct irb));
3937 #ifdef FUNCTRACE
3938                 printk(KERN_INFO "%s:%s Exit on line %d\n",
3939                         cdev->dev.bus_id,__FUNCTION__,__LINE__);
3940 #endif
3941         return 0;
3942 }
3943
3944
3945 /**
3946  *
3947  * Setup an interface.
3948  *
3949  * @param cgdev  Device to be setup.
3950  *
3951  * @returns 0 on success, !0 on failure.
3952  */
3953 static int
3954 claw_new_device(struct ccwgroup_device *cgdev)
3955 {
3956         struct claw_privbk *privptr;
3957         struct claw_env *p_env;
3958         struct net_device *dev;
3959         int ret;
3960
3961         pr_debug("%s() called\n", __FUNCTION__);
3962         printk(KERN_INFO "claw: add for %s\n",cgdev->cdev[READ]->dev.bus_id);
3963         CLAW_DBF_TEXT(2,setup,"new_dev");
3964         privptr = cgdev->dev.driver_data;
3965         cgdev->cdev[READ]->dev.driver_data = privptr;
3966         cgdev->cdev[WRITE]->dev.driver_data = privptr;
3967         if (!privptr)
3968                 return -ENODEV;
3969         p_env = privptr->p_env;
3970         sscanf(cgdev->cdev[READ]->dev.bus_id+4,"%x",
3971                 &p_env->devno[READ]);
3972         sscanf(cgdev->cdev[WRITE]->dev.bus_id+4,"%x",
3973                 &p_env->devno[WRITE]);
3974         ret = add_channel(cgdev->cdev[0],0,privptr);
3975         if (ret == 0)
3976                 ret = add_channel(cgdev->cdev[1],1,privptr);
3977         if (ret != 0) {
3978                         printk(KERN_WARNING
3979                         "add channel failed "
3980                                 "with ret = %d\n", ret);
3981                         goto out;
3982         }
3983         ret = ccw_device_set_online(cgdev->cdev[READ]);
3984         if (ret != 0) {
3985                 printk(KERN_WARNING
3986                  "claw: ccw_device_set_online %s READ failed "
3987                         "with ret = %d\n",cgdev->cdev[READ]->dev.bus_id,ret);
3988                 goto out;
3989         }
3990         ret = ccw_device_set_online(cgdev->cdev[WRITE]);
3991         if (ret != 0) {
3992                 printk(KERN_WARNING
3993                  "claw: ccw_device_set_online %s WRITE failed "
3994                         "with ret = %d\n",cgdev->cdev[WRITE]->dev.bus_id, ret);
3995                 goto out;
3996         }
3997         dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
3998         if (!dev) {
3999                 printk(KERN_WARNING "%s:alloc_netdev failed\n",__FUNCTION__);
4000                 goto out;
4001         }
4002         dev->priv = privptr;
4003         cgdev->dev.driver_data = privptr;
4004         cgdev->cdev[READ]->dev.driver_data = privptr;
4005         cgdev->cdev[WRITE]->dev.driver_data = privptr;
4006         /* sysfs magic */
4007         SET_NETDEV_DEV(dev, &cgdev->dev);
4008         if (register_netdev(dev) != 0) {
4009                 claw_free_netdevice(dev, 1);
4010                 CLAW_DBF_TEXT(2,trace,"regfail");
4011                 goto out;
4012         }
4013         dev->flags &=~IFF_RUNNING;
4014         if (privptr->buffs_alloc == 0) {
4015                 ret=init_ccw_bk(dev);
4016                 if (ret !=0) {
4017                         printk(KERN_WARNING
4018                          "claw: init_ccw_bk failed with ret=%d\n", ret);
4019                         unregister_netdev(dev);
4020                         claw_free_netdevice(dev,1);
4021                         CLAW_DBF_TEXT(2,trace,"ccwmem");
4022                         goto out;
4023                 }
4024         }
4025         privptr->channel[READ].ndev = dev;
4026         privptr->channel[WRITE].ndev = dev;
4027         privptr->p_env->ndev = dev;
4028
4029         printk(KERN_INFO "%s:readsize=%d  writesize=%d "
4030                 "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
4031                 dev->name, p_env->read_size,
4032                 p_env->write_size, p_env->read_buffers,
4033                 p_env->write_buffers, p_env->devno[READ],
4034                 p_env->devno[WRITE]);
4035         printk(KERN_INFO "%s:host_name:%.8s, adapter_name "
4036                 ":%.8s api_type: %.8s\n",
4037                 dev->name, p_env->host_name,
4038                 p_env->adapter_name , p_env->api_type);
4039         return 0;
4040 out:
4041         ccw_device_set_offline(cgdev->cdev[1]);
4042         ccw_device_set_offline(cgdev->cdev[0]);
4043
4044         return -ENODEV;
4045 }
4046
4047 static void
4048 claw_purge_skb_queue(struct sk_buff_head *q)
4049 {
4050         struct sk_buff *skb;
4051
4052         CLAW_DBF_TEXT(4,trace,"purgque");
4053
4054         while ((skb = skb_dequeue(q))) {
4055                 atomic_dec(&skb->users);
4056                 dev_kfree_skb_any(skb);
4057         }
4058 }
4059
4060 /**
4061  * Shutdown an interface.
4062  *
4063  * @param cgdev  Device to be shut down.
4064  *
4065  * @returns 0 on success, !0 on failure.
4066  */
4067 static int
4068 claw_shutdown_device(struct ccwgroup_device *cgdev)
4069 {
4070         struct claw_privbk *priv;
4071         struct net_device *ndev;
4072         int     ret;
4073
4074         pr_debug("%s() called\n", __FUNCTION__);
4075         CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
4076         priv = cgdev->dev.driver_data;
4077         if (!priv)
4078                 return -ENODEV;
4079         ndev = priv->channel[READ].ndev;
4080         if (ndev) {
4081                 /* Close the device */
4082                 printk(KERN_INFO
4083                         "%s: shuting down \n",ndev->name);
4084                 if (ndev->flags & IFF_RUNNING)
4085                         ret = claw_release(ndev);
4086                 ndev->flags &=~IFF_RUNNING;
4087                 unregister_netdev(ndev);
4088                 ndev->priv = NULL;  /* cgdev data, not ndev's to free */
4089                 claw_free_netdevice(ndev, 1);
4090                 priv->channel[READ].ndev = NULL;
4091                 priv->channel[WRITE].ndev = NULL;
4092                 priv->p_env->ndev = NULL;
4093         }
4094         ccw_device_set_offline(cgdev->cdev[1]);
4095         ccw_device_set_offline(cgdev->cdev[0]);
4096         return 0;
4097 }
4098
4099 static void
4100 claw_remove_device(struct ccwgroup_device *cgdev)
4101 {
4102         struct claw_privbk *priv;
4103
4104         pr_debug("%s() called\n", __FUNCTION__);
4105         CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
4106         priv = cgdev->dev.driver_data;
4107         if (!priv) {
4108                 printk(KERN_WARNING "claw: %s() no Priv exiting\n",__FUNCTION__);
4109                 return;
4110         }
4111         printk(KERN_INFO "claw: %s() called %s will be removed.\n",
4112                         __FUNCTION__,cgdev->cdev[0]->dev.bus_id);
4113         if (cgdev->state == CCWGROUP_ONLINE)
4114                 claw_shutdown_device(cgdev);
4115         claw_remove_files(&cgdev->dev);
4116         kfree(priv->p_mtc_envelope);
4117         priv->p_mtc_envelope=NULL;
4118         kfree(priv->p_env);
4119         priv->p_env=NULL;
4120         kfree(priv->channel[0].irb);
4121         priv->channel[0].irb=NULL;
4122         kfree(priv->channel[1].irb);
4123         priv->channel[1].irb=NULL;
4124         kfree(priv);
4125         cgdev->dev.driver_data=NULL;
4126         cgdev->cdev[READ]->dev.driver_data = NULL;
4127         cgdev->cdev[WRITE]->dev.driver_data = NULL;
4128         put_device(&cgdev->dev);
4129 }
4130
4131
4132 /*
4133  * sysfs attributes
4134  */
4135 static ssize_t
4136 claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
4137 {
4138         struct claw_privbk *priv;
4139         struct claw_env *  p_env;
4140
4141         priv = dev->driver_data;
4142         if (!priv)
4143                 return -ENODEV;
4144         p_env = priv->p_env;
4145         return sprintf(buf, "%s\n",p_env->host_name);
4146 }
4147
4148 static ssize_t
4149 claw_hname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4150 {
4151         struct claw_privbk *priv;
4152         struct claw_env *  p_env;
4153
4154         priv = dev->driver_data;
4155         if (!priv)
4156                 return -ENODEV;
4157         p_env = priv->p_env;
4158         if (count > MAX_NAME_LEN+1)
4159                 return -EINVAL;
4160         memset(p_env->host_name, 0x20, MAX_NAME_LEN);
4161         strncpy(p_env->host_name,buf, count);
4162         p_env->host_name[count-1] = 0x20;  /* clear extra 0x0a */
4163         p_env->host_name[MAX_NAME_LEN] = 0x00;
4164         CLAW_DBF_TEXT(2,setup,"HstnSet");
4165         CLAW_DBF_TEXT_(2,setup,"%s",p_env->host_name);
4166
4167         return count;
4168 }
4169
4170 static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
4171
4172 static ssize_t
4173 claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
4174 {
4175         struct claw_privbk *priv;
4176         struct claw_env *  p_env;
4177
4178         priv = dev->driver_data;
4179         if (!priv)
4180                 return -ENODEV;
4181         p_env = priv->p_env;
4182         return sprintf(buf, "%s\n",p_env->adapter_name);
4183 }
4184
4185 static ssize_t
4186 claw_adname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4187 {
4188         struct claw_privbk *priv;
4189         struct claw_env *  p_env;
4190
4191         priv = dev->driver_data;
4192         if (!priv)
4193                 return -ENODEV;
4194         p_env = priv->p_env;
4195         if (count > MAX_NAME_LEN+1)
4196                 return -EINVAL;
4197         memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
4198         strncpy(p_env->adapter_name,buf, count);
4199         p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
4200         p_env->adapter_name[MAX_NAME_LEN] = 0x00;
4201         CLAW_DBF_TEXT(2,setup,"AdnSet");
4202         CLAW_DBF_TEXT_(2,setup,"%s",p_env->adapter_name);
4203
4204         return count;
4205 }
4206
4207 static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
4208
4209 static ssize_t
4210 claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
4211 {
4212         struct claw_privbk *priv;
4213         struct claw_env *  p_env;
4214
4215         priv = dev->driver_data;
4216         if (!priv)
4217                 return -ENODEV;
4218         p_env = priv->p_env;
4219         return sprintf(buf, "%s\n",
4220                        p_env->api_type);
4221 }
4222
4223 static ssize_t
4224 claw_apname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4225 {
4226         struct claw_privbk *priv;
4227         struct claw_env *  p_env;
4228
4229         priv = dev->driver_data;
4230         if (!priv)
4231                 return -ENODEV;
4232         p_env = priv->p_env;
4233         if (count > MAX_NAME_LEN+1)
4234                 return -EINVAL;
4235         memset(p_env->api_type, 0x20, MAX_NAME_LEN);
4236         strncpy(p_env->api_type,buf, count);
4237         p_env->api_type[count-1] = 0x20;  /* we get a loose 0x0a */
4238         p_env->api_type[MAX_NAME_LEN] = 0x00;
4239         if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
4240                 p_env->read_size=DEF_PACK_BUFSIZE;
4241                 p_env->write_size=DEF_PACK_BUFSIZE;
4242                 p_env->packing=PACKING_ASK;
4243                 CLAW_DBF_TEXT(2,setup,"PACKING");
4244         }
4245         else {
4246                 p_env->packing=0;
4247                 p_env->read_size=CLAW_FRAME_SIZE;
4248                 p_env->write_size=CLAW_FRAME_SIZE;
4249                 CLAW_DBF_TEXT(2,setup,"ApiSet");
4250         }
4251         CLAW_DBF_TEXT_(2,setup,"%s",p_env->api_type);
4252         return count;
4253 }
4254
4255 static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
4256
4257 static ssize_t
4258 claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
4259 {
4260         struct claw_privbk *priv;
4261         struct claw_env * p_env;
4262
4263         priv = dev->driver_data;
4264         if (!priv)
4265                 return -ENODEV;
4266         p_env = priv->p_env;
4267         return sprintf(buf, "%d\n", p_env->write_buffers);
4268 }
4269
4270 static ssize_t
4271 claw_wbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4272 {
4273         struct claw_privbk *priv;
4274         struct claw_env *  p_env;
4275         int nnn,max;
4276
4277         priv = dev->driver_data;
4278         if (!priv)
4279                 return -ENODEV;
4280         p_env = priv->p_env;
4281         sscanf(buf, "%i", &nnn);
4282         if (p_env->packing) {
4283                 max = 64;
4284         }
4285         else {
4286                 max = 512;
4287         }
4288         if ((nnn > max ) || (nnn < 2))
4289                 return -EINVAL;
4290         p_env->write_buffers = nnn;
4291         CLAW_DBF_TEXT(2,setup,"Wbufset");
4292         CLAW_DBF_TEXT_(2,setup,"WB=%d",p_env->write_buffers);
4293         return count;
4294 }
4295
4296 static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
4297
4298 static ssize_t
4299 claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
4300 {
4301         struct claw_privbk *priv;
4302         struct claw_env *  p_env;
4303
4304         priv = dev->driver_data;
4305         if (!priv)
4306                 return -ENODEV;
4307         p_env = priv->p_env;
4308         return sprintf(buf, "%d\n", p_env->read_buffers);
4309 }
4310
4311 static ssize_t
4312 claw_rbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4313 {
4314         struct claw_privbk *priv;
4315         struct claw_env *p_env;
4316         int nnn,max;
4317
4318         priv = dev->driver_data;
4319         if (!priv)
4320                 return -ENODEV;
4321         p_env = priv->p_env;
4322         sscanf(buf, "%i", &nnn);
4323         if (p_env->packing) {
4324                 max = 64;
4325         }
4326         else {
4327                 max = 512;
4328         }
4329         if ((nnn > max ) || (nnn < 2))
4330                 return -EINVAL;
4331         p_env->read_buffers = nnn;
4332         CLAW_DBF_TEXT(2,setup,"Rbufset");
4333         CLAW_DBF_TEXT_(2,setup,"RB=%d",p_env->read_buffers);
4334         return count;
4335 }
4336
4337 static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
4338
4339 static struct attribute *claw_attr[] = {
4340         &dev_attr_read_buffer.attr,
4341         &dev_attr_write_buffer.attr,
4342         &dev_attr_adapter_name.attr,
4343         &dev_attr_api_type.attr,
4344         &dev_attr_host_name.attr,
4345         NULL,
4346 };
4347
4348 static struct attribute_group claw_attr_group = {
4349         .attrs = claw_attr,
4350 };
4351
4352 static int
4353 claw_add_files(struct device *dev)
4354 {
4355         pr_debug("%s() called\n", __FUNCTION__);
4356         CLAW_DBF_TEXT(2,setup,"add_file");
4357         return sysfs_create_group(&dev->kobj, &claw_attr_group);
4358 }
4359
4360 static void
4361 claw_remove_files(struct device *dev)
4362 {
4363         pr_debug("%s() called\n", __FUNCTION__);
4364         CLAW_DBF_TEXT(2,setup,"rem_file");
4365         sysfs_remove_group(&dev->kobj, &claw_attr_group);
4366 }
4367
4368 /*--------------------------------------------------------------------*
4369 *    claw_init  and cleanup                                           *
4370 *---------------------------------------------------------------------*/
4371
4372 static void __exit
4373 claw_cleanup(void)
4374 {
4375         unregister_cu3088_discipline(&claw_group_driver);
4376         claw_unregister_debug_facility();
4377         printk(KERN_INFO "claw: Driver unloaded\n");
4378
4379 }
4380
4381 /**
4382  * Initialize module.
4383  * This is called just after the module is loaded.
4384  *
4385  * @return 0 on success, !0 on error.
4386  */
4387 static int __init
4388 claw_init(void)
4389 {
4390         int ret = 0;
4391         printk(KERN_INFO "claw: starting driver\n");
4392
4393 #ifdef FUNCTRACE
4394         printk(KERN_INFO "claw: %s() enter \n",__FUNCTION__);
4395 #endif
4396         ret = claw_register_debug_facility();
4397         if (ret) {
4398                 printk(KERN_WARNING "claw: %s() debug_register failed %d\n",
4399                         __FUNCTION__,ret);
4400                 return ret;
4401         }
4402         CLAW_DBF_TEXT(2,setup,"init_mod");
4403         ret = register_cu3088_discipline(&claw_group_driver);
4404         if (ret) {
4405                 claw_unregister_debug_facility();
4406                 printk(KERN_WARNING "claw; %s() cu3088 register failed %d\n",
4407                         __FUNCTION__,ret);
4408         }
4409 #ifdef FUNCTRACE
4410         printk(KERN_INFO "claw: %s() exit \n",__FUNCTION__);
4411 #endif
4412         return ret;
4413 }
4414
4415 module_init(claw_init);
4416 module_exit(claw_cleanup);
4417
4418
4419
4420 /*--------------------------------------------------------------------*
4421 *    End of File                                                      *
4422 *---------------------------------------------------------------------*/
4423
4424