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  *    $Revision: 1.38 $ $Date: 2005/08/29 09:47:04 $
   6  *
   7  *  Linux for zSeries version
   8  *    Copyright (C) 2002,2005 IBM Corporation
   9  *  Author(s) Original code written by:
  10  *              Kazuo Iimura (iimura@jp.ibm.com)
  11  *            Rewritten by
  12  *              Andy Richter (richtera@us.ibm.com)
  13  *              Marc Price (mwprice@us.ibm.com)
  14  *
  15  *    sysfs parms:
  16  *   group x.x.rrrr,x.x.wwww
  17  *   read_buffer nnnnnnn
  18  *   write_buffer nnnnnn
  19  *   host_name  aaaaaaaa
  20  *   adapter_name aaaaaaaa
  21  *   api_type    aaaaaaaa
  22  *
  23  *  eg.
  24  *   group  0.0.0200 0.0.0201
  25  *   read_buffer 25
  26  *   write_buffer 20
  27  *   host_name LINUX390
  28  *   adapter_name RS6K
  29  *   api_type     TCPIP
  30  *
  31  *  where
  32  *
  33  *   The device id is decided by the order entries
  34  *   are added to the group the first is claw0 the second claw1
  35  *   up to CLAW_MAX_DEV
  36  *
  37  *   rrrr     - the first of 2 consecutive device addresses used for the
  38  *              CLAW protocol.
  39  *              The specified address is always used as the input (Read)
  40  *              channel and the next address is used as the output channel.
  41  *
  42  *   wwww     - the second of 2 consecutive device addresses used for
  43  *              the CLAW protocol.
  44  *              The specified address is always used as the output
  45  *              channel and the previous address is used as the input channel.
  46  *
  47  *   read_buffer        -       specifies number of input buffers to allocate.
  48  *   write_buffer       -       specifies number of output buffers to allocate.
  49  *   host_name          -       host name
  50  *   adaptor_name       -       adaptor name
  51  *   api_type           -       API type TCPIP or API will be sent and expected
  52  *                              as ws_name
  53  *
  54  *   Note the following requirements:
  55  *   1)  host_name must match the configured adapter_name on the remote side
  56  *   2)  adaptor_name must match the configured host name on the remote side
  57  *
  58  *  Change History
  59  *    1.00  Initial release shipped
  60  *    1.10  Changes for Buffer allocation
  61  *    1.15  Changed for 2.6 Kernel  No longer compiles on 2.4 or lower
  62  *    1.25  Added Packing support
  63  */
  64 #include <asm/bitops.h>
  65 #include <asm/ccwdev.h>
  66 #include <asm/ccwgroup.h>
  67 #include <asm/debug.h>
  68 #include <asm/idals.h>
  69 #include <asm/io.h>
  70
  71 #include <linux/ctype.h>
  72 #include <linux/delay.h>
  73 #include <linux/errno.h>
  74 #include <linux/if_arp.h>
  75 #include <linux/init.h>
  76 #include <linux/interrupt.h>
  77 #include <linux/ip.h>
  78 #include <linux/kernel.h>
  79 #include <linux/module.h>
  80 #include <linux/netdevice.h>
  81 #include <linux/etherdevice.h>
  82 #include <linux/proc_fs.h>
  83 #include <linux/sched.h>
  84 #include <linux/signal.h>
  85 #include <linux/skbuff.h>
  86 #include <linux/slab.h>
  87 #include <linux/string.h>
  88 #include <linux/tcp.h>
  89 #include <linux/timer.h>
  90 #include <linux/types.h>
  91 #include <linux/version.h>
  92
  93 #include "cu3088.h"
  94 #include "claw.h"
  95
  96 MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
  97 MODULE_DESCRIPTION("Linux for zSeries CLAW Driver\n" \
  98                         "Copyright 2000,2005 IBM Corporation\n");
  99 MODULE_LICENSE("GPL");
 100
 101 /* Debugging is based on DEBUGMSG, IOTRACE, or FUNCTRACE  options:
 102    DEBUGMSG  - Enables output of various debug messages in the code
 103    IOTRACE   - Enables output of CCW and other IO related traces
 104    FUNCTRACE - Enables output of function entry/exit trace
 105    Define any combination of above options to enable tracing
 106
 107    CLAW also uses the s390dbf file system  see claw_trace and claw_setup
 108 */
 109
 110 /* following enables tracing */
 111 //#define DEBUGMSG
 112 //#define IOTRACE
 113 //#define FUNCTRACE
 114
 115 #ifdef DEBUGMSG
 116 #define DEBUG
 117 #endif
 118
 119 #ifdef IOTRACE
 120 #define DEBUG
 121 #endif
 122
 123 #ifdef FUNCTRACE
 124 #define DEBUG
 125 #endif
 126
 127  char debug_buffer[255];
 128 /**
 129  * Debug Facility Stuff
 130  */
 131 static debug_info_t *claw_dbf_setup;
 132 static debug_info_t *claw_dbf_trace;
 133
 134 /**
 135  *  CLAW Debug Facility functions
 136  */
 137 static void
 138 claw_unregister_debug_facility(void)
 139 {
 140         if (claw_dbf_setup)
 141                 debug_unregister(claw_dbf_setup);
 142         if (claw_dbf_trace)
 143                 debug_unregister(claw_dbf_trace);
 144 }
 145
 146 static int
 147 claw_register_debug_facility(void)
 148 {
 149         claw_dbf_setup = debug_register("claw_setup", 2, 1, 8);
 150         claw_dbf_trace = debug_register("claw_trace", 2, 2, 8);
 151         if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
 152                 printk(KERN_WARNING "Not enough memory for debug facility.\n");
 153                 claw_unregister_debug_facility();
 154                 return -ENOMEM;
 155         }
 156         debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
 157         debug_set_level(claw_dbf_setup, 2);
 158         debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
 159         debug_set_level(claw_dbf_trace, 2);
 160         return 0;
 161 }
 162
 163 static inline void
 164 claw_set_busy(struct net_device *dev)
 165 {
 166  ((struct claw_privbk *) dev->priv)->tbusy=1;
 167  eieio();
 168 }
 169
 170 static inline void
 171 claw_clear_busy(struct net_device *dev)
 172 {
 173         clear_bit(0, &(((struct claw_privbk *) dev->priv)->tbusy));
 174         netif_wake_queue(dev);
 175         eieio();
 176 }
 177
 178 static inline int
 179 claw_check_busy(struct net_device *dev)
 180 {
 181         eieio();
 182         return ((struct claw_privbk *) dev->priv)->tbusy;
 183 }
 184
 185 static inline void
 186 claw_setbit_busy(int nr,struct net_device *dev)
 187 {
 188         netif_stop_queue(dev);
 189         set_bit(nr, (void *)&(((struct claw_privbk *)dev->priv)->tbusy));
 190 }
 191
 192 static inline void
 193 claw_clearbit_busy(int nr,struct net_device *dev)
 194 {
 195         clear_bit(nr,(void *)&(((struct claw_privbk *)dev->priv)->tbusy));
 196         netif_wake_queue(dev);
 197 }
 198
 199 static inline int
 200 claw_test_and_setbit_busy(int nr,struct net_device *dev)
 201 {
 202         netif_stop_queue(dev);
 203         return test_and_set_bit(nr,
 204                 (void *)&(((struct claw_privbk *) dev->priv)->tbusy));
 205 }
 206
 207
 208 /* Functions for the DEV methods */
 209
 210 static int claw_probe(struct ccwgroup_device *cgdev);
 211 static void claw_remove_device(struct ccwgroup_device *cgdev);
 212 static void claw_purge_skb_queue(struct sk_buff_head *q);
 213 static int claw_new_device(struct ccwgroup_device *cgdev);
 214 static int claw_shutdown_device(struct ccwgroup_device *cgdev);
 215 static int claw_tx(struct sk_buff *skb, struct net_device *dev);
 216 static int claw_change_mtu( struct net_device *dev, int new_mtu);
 217 static int claw_open(struct net_device *dev);
 218 static void claw_irq_handler(struct ccw_device *cdev,
 219         unsigned long intparm, struct irb *irb);
 220 static void claw_irq_tasklet ( unsigned long data );
 221 static int claw_release(struct net_device *dev);
 222 static void claw_write_retry ( struct chbk * p_ch );
 223 static void claw_write_next ( struct chbk * p_ch );
 224 static void claw_timer ( struct chbk * p_ch );
 225
 226 /* Functions */
 227 static int add_claw_reads(struct net_device *dev,
 228         struct ccwbk* p_first, struct ccwbk* p_last);
 229 static void inline ccw_check_return_code (struct ccw_device *cdev,
 230         int return_code);
 231 static void inline ccw_check_unit_check (struct chbk * p_ch,
 232         unsigned char sense );
 233 static int find_link(struct net_device *dev, char *host_name, char *ws_name );
 234 static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
 235 static int init_ccw_bk(struct net_device *dev);
 236 static void probe_error( struct ccwgroup_device *cgdev);
 237 static struct net_device_stats *claw_stats(struct net_device *dev);
 238 static int inline pages_to_order_of_mag(int num_of_pages);
 239 static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
 240 #ifdef DEBUG
 241 static void dumpit (char *buf, int len);
 242 #endif
 243 /* sysfs Functions */
 244 static ssize_t claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf);
 245 static ssize_t claw_hname_write(struct device *dev, struct device_attribute *attr,
 246         const char *buf, size_t count);
 247 static ssize_t claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf);
 248 static ssize_t claw_adname_write(struct device *dev, struct device_attribute *attr,
 249         const char *buf, size_t count);
 250 static ssize_t claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf);
 251 static ssize_t claw_apname_write(struct device *dev, struct device_attribute *attr,
 252         const char *buf, size_t count);
 253 static ssize_t claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
 254 static ssize_t claw_wbuff_write(struct device *dev, struct device_attribute *attr,
 255         const char *buf, size_t count);
 256 static ssize_t claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
 257 static ssize_t claw_rbuff_write(struct device *dev, struct device_attribute *attr,
 258         const char *buf, size_t count);
 259 static int claw_add_files(struct device *dev);
 260 static void claw_remove_files(struct device *dev);
 261
 262 /*   Functions for System Validate  */
 263 static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
 264 static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
 265        __u8 correlator, __u8 rc , char *local_name, char *remote_name);
 266 static int claw_snd_conn_req(struct net_device *dev, __u8 link);
 267 static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
 268 static int claw_snd_sys_validate_rsp(struct net_device *dev,
 269         struct clawctl * p_ctl, __u32 return_code);
 270 static int claw_strt_conn_req(struct net_device *dev );
 271 static void claw_strt_read ( struct net_device *dev, int lock );
 272 static void claw_strt_out_IO( struct net_device *dev );
 273 static void claw_free_wrt_buf( struct net_device *dev );
 274
 275 /* Functions for unpack reads   */
 276 static void unpack_read (struct net_device *dev );
 277
 278 /* ccwgroup table  */
 279
 280 static struct ccwgroup_driver claw_group_driver = {
 281         .owner       = THIS_MODULE,
 282         .name        = "claw",
 283         .max_slaves  = 2,
 284         .driver_id   = 0xC3D3C1E6,
 285         .probe       = claw_probe,
 286         .remove      = claw_remove_device,
 287         .set_online  = claw_new_device,
 288         .set_offline = claw_shutdown_device,
 289 };
 290
 291 /*
 292 *
 293 *       Key functions
 294 */
 295
 296 /*----------------------------------------------------------------*
 297  *   claw_probe                                                   *
 298  *      this function is called for each CLAW device.             *
 299  *----------------------------------------------------------------*/
 300 static int
 301 claw_probe(struct ccwgroup_device *cgdev)
 302 {
 303         int             rc;
 304         struct claw_privbk *privptr=NULL;
 305
 306 #ifdef FUNCTRACE
 307         printk(KERN_INFO "%s Enter\n",__FUNCTION__);
 308 #endif
 309         CLAW_DBF_TEXT(2,setup,"probe");
 310         if (!get_device(&cgdev->dev))
 311                 return -ENODEV;
 312 #ifdef DEBUGMSG
 313         printk(KERN_INFO "claw: variable cgdev =\n");
 314         dumpit((char *)cgdev, sizeof(struct ccwgroup_device));
 315 #endif
 316         privptr = kmalloc(sizeof(struct claw_privbk), GFP_KERNEL);
 317         if (privptr == NULL) {
 318                 probe_error(cgdev);
 319                 put_device(&cgdev->dev);
 320                 printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
 321                         cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
 322                 CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
 323                 return -ENOMEM;
 324         }
 325         memset(privptr,0x00,sizeof(struct claw_privbk));
 326         privptr->p_mtc_envelope= kmalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
 327         privptr->p_env = kmalloc(sizeof(struct claw_env), GFP_KERNEL);
 328         if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
 329                 probe_error(cgdev);
 330                 put_device(&cgdev->dev);
 331                 printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
 332                         cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
 333                 CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
 334                 return -ENOMEM;
 335         }
 336         memset(privptr->p_mtc_envelope, 0x00, MAX_ENVELOPE_SIZE);
 337         memset(privptr->p_env, 0x00, sizeof(struct claw_env));
 338         memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
 339         memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
 340         memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
 341         privptr->p_env->packing = 0;
 342         privptr->p_env->write_buffers = 5;
 343         privptr->p_env->read_buffers = 5;
 344         privptr->p_env->read_size = CLAW_FRAME_SIZE;
 345         privptr->p_env->write_size = CLAW_FRAME_SIZE;
 346         rc = claw_add_files(&cgdev->dev);
 347         if (rc) {
 348                 probe_error(cgdev);
 349                 put_device(&cgdev->dev);
 350                 printk(KERN_WARNING "add_files failed %s %s Exit Line %d \n",
 351                         cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
 352                 CLAW_DBF_TEXT_(2,setup,"probex%d",rc);
 353                 return rc;
 354         }
 355         printk(KERN_INFO "claw: sysfs files added for %s\n",cgdev->cdev[0]->dev.bus_id);
 356         privptr->p_env->p_priv = privptr;
 357         cgdev->cdev[0]->handler = claw_irq_handler;
 358         cgdev->cdev[1]->handler = claw_irq_handler;
 359         cgdev->dev.driver_data = privptr;
 360 #ifdef FUNCTRACE
 361         printk(KERN_INFO "claw:%s exit on line %d, "
 362                 "rc = 0\n",__FUNCTION__,__LINE__);
 363 #endif
 364         CLAW_DBF_TEXT(2,setup,"prbext 0");
 365
 366         return 0;
 367 }  /*  end of claw_probe       */
 368
 369 /*-------------------------------------------------------------------*
 370  *   claw_tx                                                         *
 371  *-------------------------------------------------------------------*/
 372
 373 static int
 374 claw_tx(struct sk_buff *skb, struct net_device *dev)
 375 {
 376         int             rc;
 377         struct claw_privbk *privptr=dev->priv;
 378         unsigned long saveflags;
 379         struct chbk *p_ch;
 380
 381 #ifdef FUNCTRACE
 382         printk(KERN_INFO "%s:%s enter\n",dev->name,__FUNCTION__);
 383 #endif
 384         CLAW_DBF_TEXT(4,trace,"claw_tx");
 385         p_ch=&privptr->channel[WRITE];
 386         if (skb == NULL) {
 387                 printk(KERN_WARNING "%s: null pointer passed as sk_buffer\n",
 388                         dev->name);
 389                 privptr->stats.tx_dropped++;
 390 #ifdef FUNCTRACE
 391                 printk(KERN_INFO "%s: %s() exit on line %d, rc = EIO\n",
 392                         dev->name,__FUNCTION__, __LINE__);
 393 #endif
 394                 CLAW_DBF_TEXT_(2,trace,"clawtx%d",-EIO);
 395                 return -EIO;
 396         }
 397
 398 #ifdef IOTRACE
 399         printk(KERN_INFO "%s: variable sk_buff=\n",dev->name);
 400         dumpit((char *) skb, sizeof(struct sk_buff));
 401         printk(KERN_INFO "%s: variable dev=\n",dev->name);
 402         dumpit((char *) dev, sizeof(struct net_device));
 403 #endif
 404         spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
 405         rc=claw_hw_tx( skb, dev, 1 );
 406         spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
 407 #ifdef FUNCTRACE
 408         printk(KERN_INFO "%s:%s exit on line %d, rc = %d\n",
 409                 dev->name, __FUNCTION__, __LINE__, rc);
 410 #endif
 411         CLAW_DBF_TEXT_(4,trace,"clawtx%d",rc);
 412         return rc;
 413 }   /*  end of claw_tx */
 414
 415 /*------------------------------------------------------------------*
 416  *  pack the collect queue into an skb and return it                *
 417  *   If not packing just return the top skb from the queue          *
 418  *------------------------------------------------------------------*/
 419
 420 static struct sk_buff *
 421 claw_pack_skb(struct claw_privbk *privptr)
 422 {
 423         struct sk_buff *new_skb,*held_skb;
 424         struct chbk *p_ch = &privptr->channel[WRITE];
 425         struct claw_env  *p_env = privptr->p_env;
 426         int     pkt_cnt,pk_ind,so_far;
 427
 428         new_skb = NULL;         /* assume no dice */
 429         pkt_cnt = 0;
 430         CLAW_DBF_TEXT(4,trace,"PackSKBe");
 431         if (!skb_queue_empty(&p_ch->collect_queue)) {
 432         /* some data */
 433                 held_skb = skb_dequeue(&p_ch->collect_queue);
 434                 if (held_skb)
 435                         dev_kfree_skb_any(held_skb);
 436                 else
 437                         return NULL;
 438                 if (p_env->packing != DO_PACKED)
 439                         return held_skb;
 440                 /* get a new SKB we will pack at least one */
 441                 new_skb = dev_alloc_skb(p_env->write_size);
 442                 if (new_skb == NULL) {
 443                         atomic_inc(&held_skb->users);
 444                         skb_queue_head(&p_ch->collect_queue,held_skb);
 445                         return NULL;
 446                 }
 447                 /* we have packed packet and a place to put it  */
 448                 pk_ind = 1;
 449                 so_far = 0;
 450                 new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
 451                 while ((pk_ind) && (held_skb != NULL)) {
 452                         if (held_skb->len+so_far <= p_env->write_size-8) {
 453                                 memcpy(skb_put(new_skb,held_skb->len),
 454                                         held_skb->data,held_skb->len);
 455                                 privptr->stats.tx_packets++;
 456                                 so_far += held_skb->len;
 457                                 pkt_cnt++;
 458                                 dev_kfree_skb_any(held_skb);
 459                                 held_skb = skb_dequeue(&p_ch->collect_queue);
 460                                 if (held_skb)
 461                                         atomic_dec(&held_skb->users);
 462                         } else {
 463                                 pk_ind = 0;
 464                                 atomic_inc(&held_skb->users);
 465                                 skb_queue_head(&p_ch->collect_queue,held_skb);
 466                         }
 467                 }
 468 #ifdef IOTRACE
 469                 printk(KERN_INFO "%s: %s() Packed %d len %d\n",
 470                         p_env->ndev->name,
 471                         __FUNCTION__,pkt_cnt,new_skb->len);
 472 #endif
 473         }
 474         CLAW_DBF_TEXT(4,trace,"PackSKBx");
 475         return new_skb;
 476 }
 477
 478 /*-------------------------------------------------------------------*
 479  *   claw_change_mtu                                                 *
 480  *                                                                   *
 481  *-------------------------------------------------------------------*/
 482
 483 static int
 484 claw_change_mtu(struct net_device *dev, int new_mtu)
 485 {
 486         struct claw_privbk  *privptr=dev->priv;
 487         int buff_size;
 488 #ifdef FUNCTRACE
 489         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
 490 #endif
 491 #ifdef DEBUGMSG
 492         printk(KERN_INFO "variable dev =\n");
 493         dumpit((char *) dev, sizeof(struct net_device));
 494         printk(KERN_INFO "variable new_mtu = %d\n", new_mtu);
 495 #endif
 496         CLAW_DBF_TEXT(4,trace,"setmtu");
 497         buff_size = privptr->p_env->write_size;
 498         if ((new_mtu < 60) || (new_mtu > buff_size)) {
 499 #ifdef FUNCTRACE
 500                 printk(KERN_INFO "%s:%s Exit on line %d, rc=EINVAL\n",
 501                 dev->name,
 502                 __FUNCTION__, __LINE__);
 503 #endif
 504                 return -EINVAL;
 505         }
 506         dev->mtu = new_mtu;
 507 #ifdef FUNCTRACE
 508         printk(KERN_INFO "%s:%s Exit on line %d\n",dev->name,
 509         __FUNCTION__, __LINE__);
 510 #endif
 511         return 0;
 512 }  /*   end of claw_change_mtu */
 513
 514
 515 /*-------------------------------------------------------------------*
 516  *   claw_open                                                       *
 517  *                                                                   *
 518  *-------------------------------------------------------------------*/
 519 static int
 520 claw_open(struct net_device *dev)
 521 {
 522
 523         int     rc;
 524         int     i;
 525         unsigned long       saveflags=0;
 526         unsigned long       parm;
 527         struct claw_privbk  *privptr;
 528         DECLARE_WAITQUEUE(wait, current);
 529         struct timer_list  timer;
 530         struct ccwbk *p_buf;
 531
 532 #ifdef FUNCTRACE
 533         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
 534 #endif
 535         CLAW_DBF_TEXT(4,trace,"open");
 536         if (!dev | (dev->name[0] == 0x00)) {
 537                 CLAW_DBF_TEXT(2,trace,"BadDev");
 538                 printk(KERN_WARNING "claw: Bad device at open failing \n");
 539                 return -ENODEV;
 540         }
 541         privptr = (struct claw_privbk *)dev->priv;
 542         /*   allocate and initialize CCW blocks */
 543         if (privptr->buffs_alloc == 0) {
 544                 rc=init_ccw_bk(dev);
 545                 if (rc) {
 546                         printk(KERN_INFO "%s:%s Exit on line %d, rc=ENOMEM\n",
 547                         dev->name,
 548                         __FUNCTION__, __LINE__);
 549                         CLAW_DBF_TEXT(2,trace,"openmem");
 550                         return -ENOMEM;
 551                 }
 552         }
 553         privptr->system_validate_comp=0;
 554         privptr->release_pend=0;
 555         if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
 556                 privptr->p_env->read_size=DEF_PACK_BUFSIZE;
 557                 privptr->p_env->write_size=DEF_PACK_BUFSIZE;
 558                 privptr->p_env->packing=PACKING_ASK;
 559         } else {
 560                 privptr->p_env->packing=0;
 561                 privptr->p_env->read_size=CLAW_FRAME_SIZE;
 562                 privptr->p_env->write_size=CLAW_FRAME_SIZE;
 563         }
 564         claw_set_busy(dev);
 565         tasklet_init(&privptr->channel[READ].tasklet, claw_irq_tasklet,
 566                 (unsigned long) &privptr->channel[READ]);
 567         for ( i = 0; i < 2;  i++) {
 568                 CLAW_DBF_TEXT_(2,trace,"opn_ch%d",i);
 569                 init_waitqueue_head(&privptr->channel[i].wait);
 570                 /* skb_queue_head_init(&p_ch->io_queue); */
 571                 if (i == WRITE)
 572                         skb_queue_head_init(
 573                                 &privptr->channel[WRITE].collect_queue);
 574                 privptr->channel[i].flag_a = 0;
 575                 privptr->channel[i].IO_active = 0;
 576                 privptr->channel[i].flag  &= ~CLAW_TIMER;
 577                 init_timer(&timer);
 578                 timer.function = (void *)claw_timer;
 579                 timer.data = (unsigned long)(&privptr->channel[i]);
 580                 timer.expires = jiffies + 15*HZ;
 581                 add_timer(&timer);
 582                 spin_lock_irqsave(get_ccwdev_lock(
 583                         privptr->channel[i].cdev), saveflags);
 584                 parm = (unsigned long) &privptr->channel[i];
 585                 privptr->channel[i].claw_state = CLAW_START_HALT_IO;
 586                 rc = 0;
 587                 add_wait_queue(&privptr->channel[i].wait, &wait);
 588                 rc = ccw_device_halt(
 589                         (struct ccw_device *)privptr->channel[i].cdev,parm);
 590                 set_current_state(TASK_INTERRUPTIBLE);
 591                 spin_unlock_irqrestore(
 592                         get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
 593                 schedule();
 594                 set_current_state(TASK_RUNNING);
 595                 remove_wait_queue(&privptr->channel[i].wait, &wait);
 596                 if(rc != 0)
 597                         ccw_check_return_code(privptr->channel[i].cdev, rc);
 598                 if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
 599                         del_timer(&timer);
 600         }
 601         if ((((privptr->channel[READ].last_dstat |
 602                 privptr->channel[WRITE].last_dstat) &
 603            ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
 604            (((privptr->channel[READ].flag |
 605                 privptr->channel[WRITE].flag) & CLAW_TIMER) != 0x00)) {
 606 #ifdef DEBUGMSG
 607                 printk(KERN_INFO "%s: channel problems during open - read:"
 608                         " %02x -  write: %02x\n",
 609                         dev->name,
 610                         privptr->channel[READ].last_dstat,
 611                         privptr->channel[WRITE].last_dstat);
 612 #endif
 613                 printk(KERN_INFO "%s: remote side is not ready\n", dev->name);
 614                 CLAW_DBF_TEXT(2,trace,"notrdy");
 615
 616                 for ( i = 0; i < 2;  i++) {
 617                         spin_lock_irqsave(
 618                                 get_ccwdev_lock(privptr->channel[i].cdev),
 619                                 saveflags);
 620                         parm = (unsigned long) &privptr->channel[i];
 621                         privptr->channel[i].claw_state = CLAW_STOP;
 622                         rc = ccw_device_halt(
 623                                 (struct ccw_device *)&privptr->channel[i].cdev,
 624                                 parm);
 625                         spin_unlock_irqrestore(
 626                                 get_ccwdev_lock(privptr->channel[i].cdev),
 627                                 saveflags);
 628                         if (rc != 0) {
 629                                 ccw_check_return_code(
 630                                         privptr->channel[i].cdev, rc);
 631                         }
 632                 }
 633                 free_pages((unsigned long)privptr->p_buff_ccw,
 634                         (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
 635                 if (privptr->p_env->read_size < PAGE_SIZE) {
 636                         free_pages((unsigned long)privptr->p_buff_read,
 637                                (int)pages_to_order_of_mag(
 638                                         privptr->p_buff_read_num));
 639                 }
 640                 else {
 641                         p_buf=privptr->p_read_active_first;
 642                         while (p_buf!=NULL) {
 643                                 free_pages((unsigned long)p_buf->p_buffer,
 644                                       (int)pages_to_order_of_mag(
 645                                         privptr->p_buff_pages_perread ));
 646                                 p_buf=p_buf->next;
 647                         }
 648                 }
 649                 if (privptr->p_env->write_size < PAGE_SIZE ) {
 650                         free_pages((unsigned long)privptr->p_buff_write,
 651                              (int)pages_to_order_of_mag(
 652                                 privptr->p_buff_write_num));
 653                 }
 654                 else {
 655                         p_buf=privptr->p_write_active_first;
 656                         while (p_buf!=NULL) {
 657                                 free_pages((unsigned long)p_buf->p_buffer,
 658                                      (int)pages_to_order_of_mag(
 659                                         privptr->p_buff_pages_perwrite ));
 660                                 p_buf=p_buf->next;
 661                         }
 662                 }
 663                 privptr->buffs_alloc = 0;
 664                 privptr->channel[READ].flag= 0x00;
 665                 privptr->channel[WRITE].flag = 0x00;
 666                 privptr->p_buff_ccw=NULL;
 667                 privptr->p_buff_read=NULL;
 668                 privptr->p_buff_write=NULL;
 669                 claw_clear_busy(dev);
 670 #ifdef FUNCTRACE
 671                 printk(KERN_INFO "%s:%s Exit on line %d, rc=EIO\n",
 672                 dev->name,__FUNCTION__,__LINE__);
 673 #endif
 674                 CLAW_DBF_TEXT(2,trace,"open EIO");
 675                 return -EIO;
 676         }
 677
 678         /*   Send SystemValidate command */
 679
 680         claw_clear_busy(dev);
 681
 682 #ifdef FUNCTRACE
 683         printk(KERN_INFO "%s:%s Exit on line %d, rc=0\n",
 684                 dev->name,__FUNCTION__,__LINE__);
 685 #endif
 686         CLAW_DBF_TEXT(4,trace,"openok");
 687         return 0;
 688 }    /*     end of claw_open    */
 689
 690 /*-------------------------------------------------------------------*
 691 *                                                                    *
 692 *       claw_irq_handler                                             *
 693 *                                                                    *
 694 *--------------------------------------------------------------------*/
 695 static void
 696 claw_irq_handler(struct ccw_device *cdev,
 697         unsigned long intparm, struct irb *irb)
 698 {
 699         struct chbk *p_ch = NULL;
 700         struct claw_privbk *privptr = NULL;
 701         struct net_device *dev = NULL;
 702         struct claw_env  *p_env;
 703         struct chbk *p_ch_r=NULL;
 704
 705
 706 #ifdef FUNCTRACE
 707         printk(KERN_INFO "%s enter  \n",__FUNCTION__);
 708 #endif
 709         CLAW_DBF_TEXT(4,trace,"clawirq");
 710         /* Bypass all 'unsolicited interrupts' */
 711         if (!cdev->dev.driver_data) {
 712                 printk(KERN_WARNING "claw: unsolicited interrupt for device:"
 713                         "%s received c-%02x d-%02x\n",
 714                         cdev->dev.bus_id,irb->scsw.cstat, irb->scsw.dstat);
 715 #ifdef FUNCTRACE
 716                 printk(KERN_INFO "claw: %s() "
 717                         "exit on line %d\n",__FUNCTION__,__LINE__);
 718 #endif
 719                 CLAW_DBF_TEXT(2,trace,"badirq");
 720                 return;
 721         }
 722         privptr = (struct claw_privbk *)cdev->dev.driver_data;
 723
 724         /* Try to extract channel from driver data. */
 725         if (privptr->channel[READ].cdev == cdev)
 726                 p_ch = &privptr->channel[READ];
 727         else if (privptr->channel[WRITE].cdev == cdev)
 728                 p_ch = &privptr->channel[WRITE];
 729         else {
 730                 printk(KERN_WARNING "claw: Can't determine channel for "
 731                         "interrupt, device %s\n", cdev->dev.bus_id);
 732                 CLAW_DBF_TEXT(2,trace,"badchan");
 733                 return;
 734         }
 735         CLAW_DBF_TEXT_(4,trace,"IRQCH=%d",p_ch->flag);
 736
 737         dev = (struct net_device *) (p_ch->ndev);
 738         p_env=privptr->p_env;
 739
 740 #ifdef IOTRACE
 741         printk(KERN_INFO "%s: interrupt for device: %04x "
 742                 "received c-%02x d-%02x state-%02x\n",
 743                 dev->name, p_ch->devno, irb->scsw.cstat,
 744                 irb->scsw.dstat, p_ch->claw_state);
 745 #endif
 746
 747         /* Copy interruption response block. */
 748         memcpy(p_ch->irb, irb, sizeof(struct irb));
 749
 750         /* Check for good subchannel return code, otherwise error message */
 751         if (irb->scsw.cstat  &&  !(irb->scsw.cstat & SCHN_STAT_PCI)) {
 752                 printk(KERN_INFO "%s: subchannel check for device: %04x -"
 753                         " Sch Stat %02x  Dev Stat %02x CPA - %04x\n",
 754                         dev->name, p_ch->devno,
 755                         irb->scsw.cstat, irb->scsw.dstat,irb->scsw.cpa);
 756 #ifdef IOTRACE
 757                 dumpit((char *)irb,sizeof(struct irb));
 758                 dumpit((char *)(unsigned long)irb->scsw.cpa,
 759                         sizeof(struct ccw1));
 760 #endif
 761 #ifdef FUNCTRACE
 762                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 763                 dev->name,__FUNCTION__,__LINE__);
 764 #endif
 765                 CLAW_DBF_TEXT(2,trace,"chanchk");
 766                 /* return; */
 767         }
 768
 769         /* Check the reason-code of a unit check */
 770         if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
 771                 ccw_check_unit_check(p_ch, irb->ecw[0]);
 772         }
 773
 774         /* State machine to bring the connection up, down and to restart */
 775         p_ch->last_dstat = irb->scsw.dstat;
 776
 777         switch (p_ch->claw_state) {
 778                 case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
 779 #ifdef DEBUGMSG
 780                         printk(KERN_INFO "%s: CLAW_STOP enter\n", dev->name);
 781 #endif
 782                         if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
 783                         (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
 784                         (p_ch->irb->scsw.stctl ==
 785                         (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
 786 #ifdef FUNCTRACE
 787                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 788                                         dev->name,__FUNCTION__,__LINE__);
 789 #endif
 790                                 return;
 791                         }
 792                         wake_up(&p_ch->wait);   /* wake up claw_release */
 793
 794 #ifdef DEBUGMSG
 795                         printk(KERN_INFO "%s: CLAW_STOP exit\n", dev->name);
 796 #endif
 797 #ifdef FUNCTRACE
 798                         printk(KERN_INFO "%s:%s Exit on line %d\n",
 799                                 dev->name,__FUNCTION__,__LINE__);
 800 #endif
 801                         CLAW_DBF_TEXT(4,trace,"stop");
 802                         return;
 803
 804                 case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open  */
 805 #ifdef DEBUGMSG
 806                         printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO\n",
 807                                 dev->name);
 808 #endif
 809                         if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
 810                         (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
 811                         (p_ch->irb->scsw.stctl ==
 812                         (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
 813 #ifdef FUNCTRACE
 814                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 815                                         dev->name,__FUNCTION__,__LINE__);
 816 #endif
 817                                 CLAW_DBF_TEXT(4,trace,"haltio");
 818                                 return;
 819                         }
 820                         if (p_ch->flag == CLAW_READ) {
 821                                 p_ch->claw_state = CLAW_START_READ;
 822                                 wake_up(&p_ch->wait); /* wake claw_open (READ)*/
 823                         }
 824                         else
 825                            if (p_ch->flag == CLAW_WRITE) {
 826                                 p_ch->claw_state = CLAW_START_WRITE;
 827                                 /*      send SYSTEM_VALIDATE                    */
 828                                 claw_strt_read(dev, LOCK_NO);
 829                                 claw_send_control(dev,
 830                                         SYSTEM_VALIDATE_REQUEST,
 831                                         0, 0, 0,
 832                                         p_env->host_name,
 833                                         p_env->adapter_name );
 834                         } else {
 835                                 printk(KERN_WARNING "claw: unsolicited "
 836                                         "interrupt for device:"
 837                                         "%s received c-%02x d-%02x\n",
 838                                         cdev->dev.bus_id,
 839                                         irb->scsw.cstat,
 840                                         irb->scsw.dstat);
 841                                 return;
 842                                 }
 843 #ifdef DEBUGMSG
 844                         printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO exit\n",
 845                                 dev->name);
 846 #endif
 847 #ifdef FUNCTRACE
 848                         printk(KERN_INFO "%s:%s Exit on line %d\n",
 849                                 dev->name,__FUNCTION__,__LINE__);
 850 #endif
 851                         CLAW_DBF_TEXT(4,trace,"haltio");
 852                         return;
 853                 case CLAW_START_READ:
 854                         CLAW_DBF_TEXT(4,trace,"ReadIRQ");
 855                         if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
 856                                 clear_bit(0, (void *)&p_ch->IO_active);
 857                                 if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
 858                                     (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
 859                                     (p_ch->irb->ecw[0])        == 0)
 860                                 {
 861                                         privptr->stats.rx_errors++;
 862                                         printk(KERN_INFO "%s: Restart is "
 863                                                 "required after remote "
 864                                                 "side recovers \n",
 865                                                 dev->name);
 866                                 }
 867 #ifdef FUNCTRACE
 868                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 869                                         dev->name,__FUNCTION__,__LINE__);
 870 #endif
 871                                         CLAW_DBF_TEXT(4,trace,"notrdy");
 872                                         return;
 873                         }
 874                         if ((p_ch->irb->scsw.cstat & SCHN_STAT_PCI) &&
 875                             (p_ch->irb->scsw.dstat==0)) {
 876                                 if (test_and_set_bit(CLAW_BH_ACTIVE,
 877                                         (void *)&p_ch->flag_a) == 0) {
 878                                         tasklet_schedule(&p_ch->tasklet);
 879                                 }
 880                                 else {
 881                                         CLAW_DBF_TEXT(4,trace,"PCINoBH");
 882                                 }
 883 #ifdef FUNCTRACE
 884                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 885                                         dev->name,__FUNCTION__,__LINE__);
 886 #endif
 887                                 CLAW_DBF_TEXT(4,trace,"PCI_read");
 888                                 return;
 889                         }
 890                         if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
 891                          (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
 892                          (p_ch->irb->scsw.stctl ==
 893                          (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
 894 #ifdef FUNCTRACE
 895                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 896                                         dev->name,__FUNCTION__,__LINE__);
 897 #endif
 898                                 CLAW_DBF_TEXT(4,trace,"SPend_rd");
 899                                 return;
 900                         }
 901                         clear_bit(0, (void *)&p_ch->IO_active);
 902                         claw_clearbit_busy(TB_RETRY,dev);
 903                         if (test_and_set_bit(CLAW_BH_ACTIVE,
 904                                 (void *)&p_ch->flag_a) == 0) {
 905                                 tasklet_schedule(&p_ch->tasklet);
 906                          }
 907                         else {
 908                                 CLAW_DBF_TEXT(4,trace,"RdBHAct");
 909                         }
 910
 911 #ifdef DEBUGMSG
 912                         printk(KERN_INFO "%s: process CLAW_START_READ exit\n",
 913                                 dev->name);
 914 #endif
 915 #ifdef FUNCTRACE
 916                         printk(KERN_INFO "%s:%s Exit on line %d\n",
 917                                 dev->name,__FUNCTION__,__LINE__);
 918 #endif
 919                         CLAW_DBF_TEXT(4,trace,"RdIRQXit");
 920                         return;
 921                 case CLAW_START_WRITE:
 922                         if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
 923                                 printk(KERN_INFO "%s: Unit Check Occured in "
 924                                         "write channel\n",dev->name);
 925                                 clear_bit(0, (void *)&p_ch->IO_active);
 926                                 if (p_ch->irb->ecw[0] & 0x80 ) {
 927                                         printk(KERN_INFO "%s: Resetting Event "
 928                                                 "occurred:\n",dev->name);
 929                                         init_timer(&p_ch->timer);
 930                                         p_ch->timer.function =
 931                                                 (void *)claw_write_retry;
 932                                         p_ch->timer.data = (unsigned long)p_ch;
 933                                         p_ch->timer.expires = jiffies + 10*HZ;
 934                                         add_timer(&p_ch->timer);
 935                                         printk(KERN_INFO "%s: write connection "
 936                                                 "restarting\n",dev->name);
 937                                 }
 938 #ifdef FUNCTRACE
 939                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 940                                         dev->name,__FUNCTION__,__LINE__);
 941 #endif
 942                                 CLAW_DBF_TEXT(4,trace,"rstrtwrt");
 943                                 return;
 944                         }
 945                         if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) {
 946                                         clear_bit(0, (void *)&p_ch->IO_active);
 947                                         printk(KERN_INFO "%s: Unit Exception "
 948                                                 "Occured in write channel\n",
 949                                                 dev->name);
 950                         }
 951                         if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
 952                         (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
 953                         (p_ch->irb->scsw.stctl ==
 954                         (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
 955 #ifdef FUNCTRACE
 956                                 printk(KERN_INFO "%s:%s Exit on line %d\n",
 957                                         dev->name,__FUNCTION__,__LINE__);
 958 #endif
 959                                 CLAW_DBF_TEXT(4,trace,"writeUE");
 960                                 return;
 961                         }
 962                         clear_bit(0, (void *)&p_ch->IO_active);
 963                         if (claw_test_and_setbit_busy(TB_TX,dev)==0) {
 964                                 claw_write_next(p_ch);
 965                                 claw_clearbit_busy(TB_TX,dev);
 966                                 claw_clear_busy(dev);
 967                         }
 968                         p_ch_r=(struct chbk *)&privptr->channel[READ];
 969                         if (test_and_set_bit(CLAW_BH_ACTIVE,
 970                                         (void *)&p_ch_r->flag_a) == 0) {
 971                                 tasklet_schedule(&p_ch_r->tasklet);
 972                         }
 973
 974 #ifdef DEBUGMSG
 975                         printk(KERN_INFO "%s: process CLAW_START_WRITE exit\n",
 976                                  dev->name);
 977 #endif
 978 #ifdef FUNCTRACE
 979                         printk(KERN_INFO "%s:%s Exit on line %d\n",
 980                                 dev->name,__FUNCTION__,__LINE__);
 981 #endif
 982                         CLAW_DBF_TEXT(4,trace,"StWtExit");
 983                         return;
 984                 default:
 985                         printk(KERN_WARNING "%s: wrong selection code - irq "
 986                                 "state=%d\n",dev->name,p_ch->claw_state);
 987 #ifdef FUNCTRACE
 988                         printk(KERN_INFO "%s:%s Exit on line %d\n",
 989                                 dev->name,__FUNCTION__,__LINE__);
 990 #endif
 991                         CLAW_DBF_TEXT(2,trace,"badIRQ");
 992                         return;
 993         }
 994
 995 }       /*   end of claw_irq_handler    */
 996
 997
 998 /*-------------------------------------------------------------------*
 999 *       claw_irq_tasklet                                             *
1000 *                                                                    *
1001 *--------------------------------------------------------------------*/
1002 static void
1003 claw_irq_tasklet ( unsigned long data )
1004 {
1005         struct chbk * p_ch;
1006         struct net_device  *dev;
1007         struct claw_privbk *       privptr;
1008
1009         p_ch = (struct chbk *) data;
1010         dev = (struct net_device *)p_ch->ndev;
1011 #ifdef FUNCTRACE
1012         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
1013 #endif
1014 #ifdef DEBUGMSG
1015         printk(KERN_INFO "%s: variable p_ch =\n",dev->name);
1016         dumpit((char *) p_ch, sizeof(struct chbk));
1017 #endif
1018         CLAW_DBF_TEXT(4,trace,"IRQtask");
1019
1020         privptr = (struct claw_privbk *) dev->priv;
1021
1022 #ifdef DEBUGMSG
1023         printk(KERN_INFO "%s: bh routine - state-%02x\n" ,
1024                 dev->name, p_ch->claw_state);
1025 #endif
1026
1027         unpack_read(dev);
1028         clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
1029         CLAW_DBF_TEXT(4,trace,"TskletXt");
1030 #ifdef FUNCTRACE
1031         printk(KERN_INFO "%s:%s Exit on line %d\n",
1032                 dev->name,__FUNCTION__,__LINE__);
1033 #endif
1034         return;
1035 }       /*    end of claw_irq_bh    */
1036
1037 /*-------------------------------------------------------------------*
1038 *       claw_release                                                 *
1039 *                                                                    *
1040 *--------------------------------------------------------------------*/
1041 static int
1042 claw_release(struct net_device *dev)
1043 {
1044         int                rc;
1045         int                i;
1046         unsigned long      saveflags;
1047         unsigned long      parm;
1048         struct claw_privbk *privptr;
1049         DECLARE_WAITQUEUE(wait, current);
1050         struct ccwbk*             p_this_ccw;
1051         struct ccwbk*             p_buf;
1052
1053         if (!dev)
1054                 return 0;
1055         privptr = (struct claw_privbk *) dev->priv;
1056         if (!privptr)
1057                 return 0;
1058 #ifdef FUNCTRACE
1059         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
1060 #endif
1061         CLAW_DBF_TEXT(4,trace,"release");
1062 #ifdef DEBUGMSG
1063         printk(KERN_INFO "%s: variable dev =\n",dev->name);
1064         dumpit((char *) dev, sizeof(struct net_device));
1065         printk(KERN_INFO "Priv Buffalloc %d\n",privptr->buffs_alloc);
1066         printk(KERN_INFO "Priv p_buff_ccw = %p\n",&privptr->p_buff_ccw);
1067 #endif
1068         privptr->release_pend=1;
1069         claw_setbit_busy(TB_STOP,dev);
1070         for ( i = 1; i >=0 ;  i--) {
1071                 spin_lock_irqsave(
1072                         get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
1073              /*   del_timer(&privptr->channel[READ].timer);  */
1074                 privptr->channel[i].claw_state = CLAW_STOP;
1075                 privptr->channel[i].IO_active = 0;
1076                 parm = (unsigned long) &privptr->channel[i];
1077                 if (i == WRITE)
1078                         claw_purge_skb_queue(
1079                                 &privptr->channel[WRITE].collect_queue);
1080                 rc = ccw_device_halt (privptr->channel[i].cdev, parm);
1081                 if (privptr->system_validate_comp==0x00)  /* never opened? */
1082                    init_waitqueue_head(&privptr->channel[i].wait);
1083                 add_wait_queue(&privptr->channel[i].wait, &wait);
1084                 set_current_state(TASK_INTERRUPTIBLE);
1085                 spin_unlock_irqrestore(
1086                         get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
1087                 schedule();
1088                 set_current_state(TASK_RUNNING);
1089                 remove_wait_queue(&privptr->channel[i].wait, &wait);
1090                 if (rc != 0) {
1091                         ccw_check_return_code(privptr->channel[i].cdev, rc);
1092                 }
1093         }
1094         if (privptr->pk_skb != NULL) {
1095                 dev_kfree_skb_any(privptr->pk_skb);
1096                 privptr->pk_skb = NULL;
1097         }
1098         if(privptr->buffs_alloc != 1) {
1099 #ifdef FUNCTRACE
1100         printk(KERN_INFO "%s:%s Exit on line %d\n",
1101                 dev->name,__FUNCTION__,__LINE__);
1102 #endif
1103                 CLAW_DBF_TEXT(4,trace,"none2fre");
1104                 return 0;
1105         }
1106         CLAW_DBF_TEXT(4,trace,"freebufs");
1107         if (privptr->p_buff_ccw != NULL) {
1108                 free_pages((unsigned long)privptr->p_buff_ccw,
1109                         (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
1110         }
1111         CLAW_DBF_TEXT(4,trace,"freeread");
1112         if (privptr->p_env->read_size < PAGE_SIZE) {
1113             if (privptr->p_buff_read != NULL) {
1114                 free_pages((unsigned long)privptr->p_buff_read,
1115                       (int)pages_to_order_of_mag(privptr->p_buff_read_num));
1116                 }
1117         }
1118         else {
1119                 p_buf=privptr->p_read_active_first;
1120                 while (p_buf!=NULL) {
1121                         free_pages((unsigned long)p_buf->p_buffer,
1122                              (int)pages_to_order_of_mag(
1123                                 privptr->p_buff_pages_perread ));
1124                         p_buf=p_buf->next;
1125                 }
1126         }
1127          CLAW_DBF_TEXT(4,trace,"freewrit");
1128         if (privptr->p_env->write_size < PAGE_SIZE ) {
1129                 free_pages((unsigned long)privptr->p_buff_write,
1130                       (int)pages_to_order_of_mag(privptr->p_buff_write_num));
1131         }
1132         else {
1133                 p_buf=privptr->p_write_active_first;
1134                 while (p_buf!=NULL) {
1135                         free_pages((unsigned long)p_buf->p_buffer,
1136                               (int)pages_to_order_of_mag(
1137                               privptr->p_buff_pages_perwrite ));
1138                         p_buf=p_buf->next;
1139                 }
1140         }
1141          CLAW_DBF_TEXT(4,trace,"clearptr");
1142         privptr->buffs_alloc = 0;
1143         privptr->p_buff_ccw=NULL;
1144         privptr->p_buff_read=NULL;
1145         privptr->p_buff_write=NULL;
1146         privptr->system_validate_comp=0;
1147         privptr->release_pend=0;
1148         /*      Remove any writes that were pending and reset all reads   */
1149         p_this_ccw=privptr->p_read_active_first;
1150         while (p_this_ccw!=NULL) {
1151                 p_this_ccw->header.length=0xffff;
1152                 p_this_ccw->header.opcode=0xff;
1153                 p_this_ccw->header.flag=0x00;
1154                 p_this_ccw=p_this_ccw->next;
1155         }
1156
1157         while (privptr->p_write_active_first!=NULL) {
1158                 p_this_ccw=privptr->p_write_active_first;
1159                 p_this_ccw->header.flag=CLAW_PENDING;
1160                 privptr->p_write_active_first=p_this_ccw->next;
1161                 p_this_ccw->next=privptr->p_write_free_chain;
1162                 privptr->p_write_free_chain=p_this_ccw;
1163                 ++privptr->write_free_count;
1164         }
1165         privptr->p_write_active_last=NULL;
1166         privptr->mtc_logical_link = -1;
1167         privptr->mtc_skipping = 1;
1168         privptr->mtc_offset=0;
1169
1170         if (((privptr->channel[READ].last_dstat |
1171                 privptr->channel[WRITE].last_dstat) &
1172                 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
1173                 printk(KERN_WARNING "%s: channel problems during close - "
1174                         "read: %02x -  write: %02x\n",
1175                 dev->name,
1176                 privptr->channel[READ].last_dstat,
1177                 privptr->channel[WRITE].last_dstat);
1178                  CLAW_DBF_TEXT(2,trace,"badclose");
1179         }
1180 #ifdef FUNCTRACE
1181         printk(KERN_INFO "%s:%s Exit on line %d\n",
1182                 dev->name,__FUNCTION__,__LINE__);
1183 #endif
1184         CLAW_DBF_TEXT(4,trace,"rlsexit");
1185         return 0;
1186 }      /* end of claw_release     */
1187
1188
1189
1190 /*-------------------------------------------------------------------*
1191 *       claw_write_retry                                             *
1192 *                                                                    *
1193 *--------------------------------------------------------------------*/
1194
1195 static void
1196 claw_write_retry ( struct chbk *p_ch )
1197 {
1198
1199         struct net_device  *dev=p_ch->ndev;
1200
1201
1202 #ifdef FUNCTRACE
1203         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
1204         printk(KERN_INFO "claw: variable p_ch =\n");
1205         dumpit((char *) p_ch, sizeof(struct chbk));
1206 #endif
1207         CLAW_DBF_TEXT(4,trace,"w_retry");
1208         if (p_ch->claw_state == CLAW_STOP) {
1209 #ifdef FUNCTRACE
1210                 printk(KERN_INFO "%s:%s Exit on line %d\n",
1211                         dev->name,__FUNCTION__,__LINE__);
1212 #endif
1213                 return;
1214         }
1215 #ifdef DEBUGMSG
1216         printk( KERN_INFO "%s:%s  state-%02x\n" ,
1217                 dev->name,
1218                 __FUNCTION__,
1219                 p_ch->claw_state);
1220 #endif
1221         claw_strt_out_IO( dev );
1222 #ifdef FUNCTRACE
1223         printk(KERN_INFO "%s:%s Exit on line %d\n",
1224                 dev->name,__FUNCTION__,__LINE__);
1225 #endif
1226         CLAW_DBF_TEXT(4,trace,"rtry_xit");
1227         return;
1228 }      /* end of claw_write_retry      */
1229
1230
1231 /*-------------------------------------------------------------------*
1232 *       claw_write_next                                              *
1233 *                                                                    *
1234 *--------------------------------------------------------------------*/
1235
1236 static void
1237 claw_write_next ( struct chbk * p_ch )
1238 {
1239
1240         struct net_device  *dev;
1241         struct claw_privbk *privptr=NULL;
1242         struct sk_buff *pk_skb;
1243         int     rc;
1244
1245 #ifdef FUNCTRACE
1246         printk(KERN_INFO "%s:%s Enter  \n",p_ch->ndev->name,__FUNCTION__);
1247         printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
1248         dumpit((char *) p_ch, sizeof(struct chbk));
1249 #endif
1250         CLAW_DBF_TEXT(4,trace,"claw_wrt");
1251         if (p_ch->claw_state == CLAW_STOP)
1252                 return;
1253         dev = (struct net_device *) p_ch->ndev;
1254         privptr = (struct claw_privbk *) dev->priv;
1255         claw_free_wrt_buf( dev );
1256         if ((privptr->write_free_count > 0) &&
1257             !skb_queue_empty(&p_ch->collect_queue)) {
1258                 pk_skb = claw_pack_skb(privptr);
1259                 while (pk_skb != NULL) {
1260                         rc = claw_hw_tx( pk_skb, dev,1);
1261                         if (privptr->write_free_count > 0) {
1262                                 pk_skb = claw_pack_skb(privptr);
1263                         } else
1264                                 pk_skb = NULL;
1265                 }
1266         }
1267         if (privptr->p_write_active_first!=NULL) {
1268                 claw_strt_out_IO(dev);
1269         }
1270
1271 #ifdef FUNCTRACE
1272         printk(KERN_INFO "%s:%s Exit on line %d\n",
1273                 dev->name,__FUNCTION__,__LINE__);
1274 #endif
1275         return;
1276 }      /* end of claw_write_next      */
1277
1278 /*-------------------------------------------------------------------*
1279 *                                                                    *
1280 *       claw_timer                                                   *
1281 *--------------------------------------------------------------------*/
1282
1283 static void
1284 claw_timer ( struct chbk * p_ch )
1285 {
1286 #ifdef FUNCTRACE
1287         printk(KERN_INFO "%s:%s Entry\n",p_ch->ndev->name,__FUNCTION__);
1288         printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
1289         dumpit((char *) p_ch, sizeof(struct chbk));
1290 #endif
1291         CLAW_DBF_TEXT(4,trace,"timer");
1292         p_ch->flag |= CLAW_TIMER;
1293         wake_up(&p_ch->wait);
1294 #ifdef FUNCTRACE
1295         printk(KERN_INFO "%s:%s Exit on line %d\n",
1296                 p_ch->ndev->name,__FUNCTION__,__LINE__);
1297 #endif
1298         return;
1299 }      /* end of claw_timer  */
1300
1301
1302 /*
1303 *
1304 *       functions
1305 */
1306
1307
1308 /*-------------------------------------------------------------------*
1309 *                                                                    *
1310 *     pages_to_order_of_mag                                          *
1311 *                                                                    *
1312 *    takes a number of pages from 1 to 512 and returns the           *
1313 *    log(num_pages)/log(2) get_free_pages() needs a base 2 order     *
1314 *    of magnitude get_free_pages() has an upper order of 9           *
1315 *--------------------------------------------------------------------*/
1316
1317 static int inline
1318 pages_to_order_of_mag(int num_of_pages)
1319 {
1320         int     order_of_mag=1;         /* assume 2 pages */
1321         int     nump=2;
1322 #ifdef FUNCTRACE
1323         printk(KERN_INFO "%s Enter pages = %d \n",__FUNCTION__,num_of_pages);
1324 #endif
1325         CLAW_DBF_TEXT_(5,trace,"pages%d",num_of_pages);
1326         if (num_of_pages == 1)   {return 0; }  /* magnitude of 0 = 1 page */
1327         /* 512 pages = 2Meg on 4k page systems */
1328         if (num_of_pages >= 512) {return 9; }
1329         /* we have two or more pages order is at least 1 */
1330         for (nump=2 ;nump <= 512;nump*=2) {
1331           if (num_of_pages <= nump)
1332                   break;
1333           order_of_mag +=1;
1334         }
1335         if (order_of_mag > 9) { order_of_mag = 9; }  /* I know it's paranoid */
1336 #ifdef FUNCTRACE
1337         printk(KERN_INFO "%s Exit on line %d, order = %d\n",
1338         __FUNCTION__,__LINE__, order_of_mag);
1339 #endif
1340         CLAW_DBF_TEXT_(5,trace,"mag%d",order_of_mag);
1341         return order_of_mag;
1342 }
1343
1344 /*-------------------------------------------------------------------*
1345 *                                                                    *
1346 *     add_claw_reads                                                 *
1347 *                                                                    *
1348 *--------------------------------------------------------------------*/
1349 static int
1350 add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
1351         struct ccwbk* p_last)
1352 {
1353         struct claw_privbk *privptr;
1354         struct ccw1  temp_ccw;
1355         struct endccw * p_end;
1356 #ifdef IOTRACE
1357         struct ccwbk*  p_buf;
1358 #endif
1359 #ifdef FUNCTRACE
1360         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
1361 #endif
1362 #ifdef DEBUGMSG
1363         printk(KERN_INFO "dev\n");
1364         dumpit((char *) dev, sizeof(struct net_device));
1365         printk(KERN_INFO "p_first\n");
1366         dumpit((char *) p_first, sizeof(struct ccwbk));
1367         printk(KERN_INFO "p_last\n");
1368         dumpit((char *) p_last, sizeof(struct ccwbk));
1369 #endif
1370         CLAW_DBF_TEXT(4,trace,"addreads");
1371         privptr = dev->priv;
1372         p_end = privptr->p_end_ccw;
1373
1374         /* first CCW and last CCW contains a new set of read channel programs
1375         *       to apend the running channel programs
1376         */
1377         if ( p_first==NULL) {
1378 #ifdef FUNCTRACE
1379                 printk(KERN_INFO "%s:%s Exit on line %d\n",
1380                         dev->name,__FUNCTION__,__LINE__);
1381 #endif
1382                 CLAW_DBF_TEXT(4,trace,"addexit");
1383                 return 0;
1384         }
1385
1386         /* set up ending CCW sequence for this segment */
1387         if (p_end->read1) {
1388                 p_end->read1=0x00;    /*  second ending CCW is now active */
1389                 /*      reset ending CCWs and setup TIC CCWs              */
1390                 p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1391                 p_end->read2_nop2.flags  = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1392                 p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
1393                 p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
1394                 p_end->read2_nop2.cda=0;
1395                 p_end->read2_nop2.count=1;
1396         }
1397         else {
1398                 p_end->read1=0x01;  /* first ending CCW is now active */
1399                 /*      reset ending CCWs and setup TIC CCWs          */
1400                 p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1401                 p_end->read1_nop2.flags  = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1402                 p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
1403                 p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
1404                 p_end->read1_nop2.cda=0;
1405                 p_end->read1_nop2.count=1;
1406         }
1407
1408         if ( privptr-> p_read_active_first ==NULL ) {
1409 #ifdef DEBUGMSG
1410                 printk(KERN_INFO "%s:%s p_read_active_frist == NULL \n",
1411                         dev->name,__FUNCTION__);
1412                 printk(KERN_INFO "%s:%s Read active first/last changed \n",
1413                         dev->name,__FUNCTION__);
1414 #endif
1415                 privptr-> p_read_active_first= p_first;  /*    set new first */
1416                 privptr-> p_read_active_last = p_last;   /*    set new last  */
1417         }
1418         else {
1419
1420 #ifdef DEBUGMSG
1421                 printk(KERN_INFO "%s:%s Read in progress \n",
1422                 dev->name,__FUNCTION__);
1423 #endif
1424                 /* set up TIC ccw  */
1425                 temp_ccw.cda= (__u32)__pa(&p_first->read);
1426                 temp_ccw.count=0;
1427                 temp_ccw.flags=0;
1428                 temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
1429
1430
1431                 if (p_end->read1) {
1432
1433                /* first set of CCW's is chained to the new read              */
1434                /* chain, so the second set is chained to the active chain.   */
1435                /* Therefore modify the second set to point to the new        */
1436                /* read chain set up TIC CCWs                                 */
1437                /* make sure we update the CCW so channel doesn't fetch it    */
1438                /* when it's only half done                                   */
1439                         memcpy( &p_end->read2_nop2, &temp_ccw ,
1440                                 sizeof(struct ccw1));
1441                         privptr->p_read_active_last->r_TIC_1.cda=
1442                                 (__u32)__pa(&p_first->read);
1443                         privptr->p_read_active_last->r_TIC_2.cda=
1444                                 (__u32)__pa(&p_first->read);
1445                 }
1446                 else {
1447                         /* make sure we update the CCW so channel doesn't   */
1448                         /* fetch it when it is only half done               */
1449                         memcpy( &p_end->read1_nop2, &temp_ccw ,
1450                                 sizeof(struct ccw1));
1451                         privptr->p_read_active_last->r_TIC_1.cda=
1452                                 (__u32)__pa(&p_first->read);
1453                         privptr->p_read_active_last->r_TIC_2.cda=
1454                                 (__u32)__pa(&p_first->read);
1455                 }
1456                 /*      chain in new set of blocks                              */
1457                 privptr->p_read_active_last->next = p_first;
1458                 privptr->p_read_active_last=p_last;
1459         } /* end of if ( privptr-> p_read_active_first ==NULL)  */
1460 #ifdef IOTRACE
1461         printk(KERN_INFO "%s:%s  dump p_last CCW BK \n",dev->name,__FUNCTION__);
1462         dumpit((char *)p_last, sizeof(struct ccwbk));
1463         printk(KERN_INFO "%s:%s  dump p_end CCW BK \n",dev->name,__FUNCTION__);
1464         dumpit((char *)p_end, sizeof(struct endccw));
1465
1466         printk(KERN_INFO "%s:%s dump p_first CCW BK \n",dev->name,__FUNCTION__);
1467         dumpit((char *)p_first, sizeof(struct ccwbk));
1468         printk(KERN_INFO "%s:%s Dump Active CCW chain \n",
1469                 dev->name,__FUNCTION__);
1470         p_buf=privptr->p_read_active_first;
1471         while (p_buf!=NULL) {
1472                 dumpit((char *)p_buf, sizeof(struct ccwbk));
1473                 p_buf=p_buf->next;
1474         }
1475 #endif
1476 #ifdef FUNCTRACE
1477         printk(KERN_INFO "%s:%s Exit on line %d\n",
1478                 dev->name,__FUNCTION__,__LINE__);
1479 #endif
1480         CLAW_DBF_TEXT(4,trace,"addexit");
1481         return 0;
1482 }    /*     end of add_claw_reads   */
1483
1484 /*-------------------------------------------------------------------*
1485  *   ccw_check_return_code                                           *
1486  *                                                                   *
1487  *-------------------------------------------------------------------*/
1488
1489 static void inline
1490 ccw_check_return_code(struct ccw_device *cdev, int return_code)
1491 {
1492 #ifdef FUNCTRACE
1493         printk(KERN_INFO "%s: %s() > enter  \n",
1494                 cdev->dev.bus_id,__FUNCTION__);
1495 #endif
1496         CLAW_DBF_TEXT(4,trace,"ccwret");
1497 #ifdef DEBUGMSG
1498         printk(KERN_INFO "variable cdev =\n");
1499         dumpit((char *) cdev, sizeof(struct ccw_device));
1500         printk(KERN_INFO "variable return_code = %d\n",return_code);
1501 #endif
1502         if (return_code != 0) {
1503                 switch (return_code) {
1504                         case -EBUSY:
1505                                 printk(KERN_INFO "%s: Busy !\n",
1506                                         cdev->dev.bus_id);
1507                                 break;
1508                         case -ENODEV:
1509                                 printk(KERN_EMERG "%s: Missing device called "
1510                                         "for IO ENODEV\n", cdev->dev.bus_id);
1511                                 break;
1512                         case -EIO:
1513                                 printk(KERN_EMERG "%s: Status pending... EIO \n",
1514                                         cdev->dev.bus_id);
1515                                 break;
1516                         case -EINVAL:
1517                                 printk(KERN_EMERG "%s: Invalid Dev State EINVAL \n",
1518                                         cdev->dev.bus_id);
1519                                 break;
1520                         default:
1521                                 printk(KERN_EMERG "%s: Unknown error in "
1522                                  "Do_IO %d\n",cdev->dev.bus_id, return_code);
1523                 }
1524         }
1525 #ifdef FUNCTRACE
1526         printk(KERN_INFO "%s: %s() > exit on line %d\n",
1527                 cdev->dev.bus_id,__FUNCTION__,__LINE__);
1528 #endif
1529         CLAW_DBF_TEXT(4,trace,"ccwret");
1530 }    /*    end of ccw_check_return_code   */
1531
1532 /*-------------------------------------------------------------------*
1533 *       ccw_check_unit_check                                         *
1534 *--------------------------------------------------------------------*/
1535
1536 static void inline
1537 ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
1538 {
1539         struct net_device *dev = p_ch->ndev;
1540
1541 #ifdef FUNCTRACE
1542         printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
1543 #endif
1544 #ifdef DEBUGMSG
1545         printk(KERN_INFO "%s: variable dev =\n",dev->name);
1546         dumpit((char *)dev, sizeof(struct net_device));
1547         printk(KERN_INFO "%s: variable sense =\n",dev->name);
1548         dumpit((char *)&sense, 2);
1549 #endif
1550         CLAW_DBF_TEXT(4,trace,"unitchek");
1551
1552         printk(KERN_INFO "%s: Unit Check with sense byte:0x%04x\n",
1553                 dev->name, sense);
1554
1555         if (sense & 0x40) {
1556                 if (sense & 0x01) {
1557                         printk(KERN_WARNING "%s: Interface disconnect or "
1558                                 "Selective reset "
1559                                 "occurred (remote side)\n", dev->name);
1560                 }
1561                 else {
1562                         printk(KERN_WARNING "%s: System reset occured"
1563                                 " (remote side)\n", dev->name);
1564                 }
1565         }
1566         else if (sense & 0x20) {
1567                 if (sense & 0x04) {
1568                         printk(KERN_WARNING "%s: Data-streaming "
1569                                 "timeout)\n", dev->name);
1570                 }
1571                 else  {
1572                         printk(KERN_WARNING "%s: Data-transfer parity"
1573                                 " error\n", dev->name);
1574                 }
1575         }
1576         else if (sense & 0x10) {
1577                 if (sense & 0x20) {
1578                         printk(KERN_WARNING "%s: Hardware malfunction "
1579                                 "(remote side)\n", dev->name);
1580                 }
1581                 else {
1582                         printk(KERN_WARNING "%s: read-data parity error "
1583                                 "(remote side)\n", dev->name);
1584                 }
1585         }
1586
1587 #ifdef FUNCTRACE
1588         printk(KERN_INFO "%s: %s() exit on line %d\n",
1589                 dev->name,__FUNCTION__,__LINE__);
1590 #endif
1591 }   /*    end of ccw_check_unit_check    */
1592
1593
1594
1595 /*-------------------------------------------------------------------*
1596 * Dump buffer format                                                 *
1597 *                                                                    *
1598 *--------------------------------------------------------------------*/
1599 #ifdef DEBUG
1600 static void
1601 dumpit(char* buf, int len)
1602 {
1603
1604         __u32      ct, sw, rm, dup;
1605         char       *ptr, *rptr;
1606         char       tbuf[82], tdup[82];
1607 #if (CONFIG_ARCH_S390X)
1608         char       addr[22];
1609 #else
1610         char       addr[12];
1611 #endif
1612         char       boff[12];
1613         char       bhex[82], duphex[82];
1614         char       basc[40];
1615
1616         sw  = 0;
1617         rptr =ptr=buf;
1618         rm  = 16;
1619         duphex[0]  = 0x00;
1620         dup = 0;
1621         for ( ct=0; ct < len; ct++, ptr++, rptr++ )  {
1622                 if (sw == 0) {
1623 #if (CONFIG_ARCH_S390X)
1624                         sprintf(addr, "%16.16lX",(unsigned long)rptr);
1625 #else
1626                         sprintf(addr, "%8.8X",(__u32)rptr);
1627 #endif
1628                         sprintf(boff, "%4.4X", (__u32)ct);
1629                         bhex[0] = '\0';
1630                         basc[0] = '\0';
1631                 }
1632                 if ((sw == 4) || (sw == 12)) {
1633                         strcat(bhex, " ");
1634                 }
1635                 if (sw == 8) {
1636                         strcat(bhex, "  ");
1637                 }
1638 #if (CONFIG_ARCH_S390X)
1639                 sprintf(tbuf,"%2.2lX", (unsigned long)*ptr);
1640 #else
1641                 sprintf(tbuf,"%2.2X", (__u32)*ptr);
1642 #endif
1643                 tbuf[2] = '\0';
1644                 strcat(bhex, tbuf);
1645                 if ((0!=isprint(*ptr)) && (*ptr >= 0x20)) {
1646                         basc[sw] = *ptr;
1647                 }
1648                 else {
1649                         basc[sw] = '.';
1650                 }
1651                 basc[sw+1] = '\0';
1652                 sw++;
1653                 rm--;
1654                 if (sw==16) {
1655                         if ((strcmp(duphex, bhex)) !=0) {
1656                                 if (dup !=0) {
1657                                         sprintf(tdup,"Duplicate as above to"
1658                                                 " %s", addr);
1659                                         printk( KERN_INFO "                 "
1660                                                 "   --- %s ---\n",tdup);
1661                                 }
1662                                 printk( KERN_INFO "   %s (+%s) : %s  [%s]\n",
1663                                          addr, boff, bhex, basc);
1664                                 dup = 0;
1665                                 strcpy(duphex, bhex);
1666                         }
1667                         else {
1668                                 dup++;
1669                         }
1670                         sw = 0;
1671                         rm = 16;
1672                 }
1673         }  /* endfor */
1674
1675         if (sw != 0) {
1676                 for ( ; rm > 0; rm--, sw++ ) {
1677                         if ((sw==4) || (sw==12)) strcat(bhex, " ");
1678                         if (sw==8)               strcat(bhex, "  ");
1679                         strcat(bhex, "  ");
1680                         strcat(basc, " ");
1681                 }
1682                 if (dup !=0) {
1683                         sprintf(tdup,"Duplicate as above to %s", addr);
1684                         printk( KERN_INFO "                    --- %s ---\n",
1685                                 tdup);
1686                 }
1687                 printk( KERN_INFO "   %s (+%s) : %s  [%s]\n",
1688                         addr, boff, bhex, basc);
1689         }
1690         else {
1691                 if (dup >=1) {
1692                         sprintf(tdup,"Duplicate as above to %s", addr);
1693                         printk( KERN_INFO "                    --- %s ---\n",
1694                                 tdup);
1695                 }
1696                 if (dup !=0) {
1697                         printk( KERN_INFO "   %s (+%s) : %s  [%s]\n",
1698                                 addr, boff, bhex, basc);
1699                 }
1700         }
1701         return;
1702
1703 }   /*   end of dumpit  */
1704 #endif
1705
1706 /*-------------------------------------------------------------------*
1707 *               find_link                                            *
1708 *--------------------------------------------------------------------*/
1709 static int
1710 find_link(struct net_device *dev, char *host_name, char *ws_name )
1711 {
1712         struct claw_privbk *privptr;
1713         struct claw_env *p_env;
1714         int    rc=0;
1715
1716 #ifdef FUNCTRACE
1717         printk(KERN_INFO "%s:%s > enter  \n",dev->name,__FUNCTION__);
1718 #endif
1719         CLAW_DBF_TEXT(2,setup,"findlink");
1720 #ifdef DEBUGMSG
1721         printk(KERN_INFO "%s: variable dev = \n",dev->name);
1722         dumpit((char *) dev, sizeof(struct net_device));
1723         printk(KERN_INFO "%s: variable host_name = %s\n",dev->name, host_name);
1724         printk(KERN_INFO "%s: variable ws_name = %s\n",dev->name, ws_name);
1725 #endif
1726         privptr=dev->priv;
1727         p_env=privptr->p_env;
1728         switch (p_env->packing)
1729         {
1730                 case  PACKING_ASK:
1731                         if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
1732                             (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
1733                              rc = EINVAL;
1734                         break;
1735                 case  DO_PACKED:
1736                 case  PACK_SEND:
1737                         if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
1738                             (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
1739                                 rc = EINVAL;
1740                         break;
1741                 default:
1742                         if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
1743                             (memcmp(p_env->api_type , ws_name, 8)!=0))
1744                                 rc = EINVAL;
1745                         break;
1746         }
1747
1748 #ifdef FUNCTRACE
1749         printk(KERN_INFO "%s:%s Exit on line %d\n",
1750                 dev->name,__FUNCTION__,__LINE__);
1751 #endif
1752         return 0;
1753 }    /*    end of find_link    */
1754
1755 /*-------------------------------------------------------------------*
1756  *   claw_hw_tx                                                      *
1757  *                                                                   *
1758  *                                                                   *
1759  *-------------------------------------------------------------------*/
1760
1761 static int
1762 claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
1763 {
1764         int                             rc=0;
1765         struct claw_privbk              *privptr;
1766         struct ccwbk           *p_this_ccw;
1767         struct ccwbk           *p_first_ccw;
1768         struct ccwbk           *p_last_ccw;
1769         __u32                           numBuffers;
1770         signed long                     len_of_data;
1771         unsigned long                   bytesInThisBuffer;
1772         unsigned char                   *pDataAddress;
1773         struct endccw                   *pEnd;
1774         struct ccw1                     tempCCW;
1775         struct chbk                     *p_ch;
1776         struct claw_env                 *p_env;
1777         int                             lock;
1778         struct clawph                   *pk_head;
1779         struct chbk                     *ch;
1780 #ifdef IOTRACE
1781         struct ccwbk                   *p_buf;
1782 #endif
1783 #ifdef FUNCTRACE
1784         printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
1785 #endif
1786         CLAW_DBF_TEXT(4,trace,"hw_tx");
1787 #ifdef DEBUGMSG
1788         printk(KERN_INFO "%s: variable dev skb =\n",dev->name);
1789         dumpit((char *) skb, sizeof(struct sk_buff));
1790         printk(KERN_INFO "%s: variable dev =\n",dev->name);
1791         dumpit((char *) dev, sizeof(struct net_device));
1792         printk(KERN_INFO "%s: variable linkid = %ld\n",dev->name,linkid);
1793 #endif
1794         privptr = (struct claw_privbk *) (dev->priv);
1795         p_ch=(struct chbk *)&privptr->channel[WRITE];
1796         p_env =privptr->p_env;
1797 #ifdef IOTRACE
1798         printk(KERN_INFO "%s: %s() dump sk_buff  \n",dev->name,__FUNCTION__);
1799         dumpit((char *)skb ,sizeof(struct sk_buff));
1800 #endif
1801         claw_free_wrt_buf(dev); /* Clean up free chain if posible */
1802         /*  scan the write queue to free any completed write packets   */
1803         p_first_ccw=NULL;
1804         p_last_ccw=NULL;
1805         if ((p_env->packing >= PACK_SEND) &&
1806             (skb->cb[1] != 'P')) {
1807                 skb_push(skb,sizeof(struct clawph));
1808                 pk_head=(struct clawph *)skb->data;
1809                 pk_head->len=skb->len-sizeof(struct clawph);
1810                 if (pk_head->len%4)  {
1811                         pk_head->len+= 4-(pk_head->len%4);
1812                         skb_pad(skb,4-(pk_head->len%4));
1813                         skb_put(skb,4-(pk_head->len%4));
1814                 }
1815                 if (p_env->packing == DO_PACKED)
1816                         pk_head->link_num = linkid;
1817                 else
1818                         pk_head->link_num = 0;
1819                 pk_head->flag = 0x00;
1820                 skb_pad(skb,4);
1821                 skb->cb[1] = 'P';
1822         }
1823         if (linkid == 0) {
1824                 if (claw_check_busy(dev)) {
1825                         if (privptr->write_free_count!=0) {
1826                                 claw_clear_busy(dev);
1827                         }
1828                         else {
1829                                 claw_strt_out_IO(dev );
1830                                 claw_free_wrt_buf( dev );
1831                                 if (privptr->write_free_count==0) {
1832 #ifdef IOTRACE
1833                                         printk(KERN_INFO "%s: "
1834                                            "(claw_check_busy) no free write "
1835                                            "buffers\n", dev->name);
1836 #endif
1837                                         ch = &privptr->channel[WRITE];
1838                                         atomic_inc(&skb->users);
1839                                         skb_queue_tail(&ch->collect_queue, skb);
1840                                         goto Done;
1841                                 }
1842                                 else {
1843                                         claw_clear_busy(dev);
1844                                 }
1845                         }
1846                 }
1847                 /*  tx lock  */
1848                 if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
1849 #ifdef DEBUGMSG
1850                         printk(KERN_INFO "%s:  busy  (claw_test_and_setbit_"
1851                                 "busy)\n", dev->name);
1852 #endif
1853                         ch = &privptr->channel[WRITE];
1854                         atomic_inc(&skb->users);
1855                         skb_queue_tail(&ch->collect_queue, skb);
1856                         claw_strt_out_IO(dev );
1857                         rc=-EBUSY;
1858                         goto Done2;
1859                 }
1860         }
1861         /*      See how many write buffers are required to hold this data */
1862         numBuffers= ( skb->len + privptr->p_env->write_size - 1) /
1863                         ( privptr->p_env->write_size);
1864
1865         /*      If that number of buffers isn't available, give up for now */
1866         if (privptr->write_free_count < numBuffers ||
1867             privptr->p_write_free_chain == NULL ) {
1868
1869                 claw_setbit_busy(TB_NOBUFFER,dev);
1870
1871 #ifdef DEBUGMSG
1872                 printk(KERN_INFO "%s:  busy  (claw_setbit_busy"
1873                         "(TB_NOBUFFER))\n", dev->name);
1874                 printk(KERN_INFO "       free_count: %d, numBuffers : %d\n",
1875                         (int)privptr->write_free_count,(int) numBuffers );
1876 #endif
1877                 ch = &privptr->channel[WRITE];
1878                 atomic_inc(&skb->users);
1879                 skb_queue_tail(&ch->collect_queue, skb);
1880                 CLAW_DBF_TEXT(2,trace,"clawbusy");
1881                 goto Done2;
1882         }
1883         pDataAddress=skb->data;
1884         len_of_data=skb->len;
1885
1886         while (len_of_data > 0) {
1887 #ifdef DEBUGMSG
1888                 printk(KERN_INFO "%s: %s() length-of-data is %ld \n",
1889                         dev->name ,__FUNCTION__,len_of_data);
1890                 dumpit((char *)pDataAddress ,64);
1891 #endif
1892                 p_this_ccw=privptr->p_write_free_chain;  /* get a block */
1893                 if (p_this_ccw == NULL) { /* lost the race */
1894                         ch = &privptr->channel[WRITE];
1895                         atomic_inc(&skb->users);
1896                         skb_queue_tail(&ch->collect_queue, skb);
1897                         goto Done2;
1898                 }
1899                 privptr->p_write_free_chain=p_this_ccw->next;
1900                 p_this_ccw->next=NULL;
1901                 --privptr->write_free_count; /* -1 */
1902                 bytesInThisBuffer=len_of_data;
1903                 memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
1904                 len_of_data-=bytesInThisBuffer;
1905                 pDataAddress+=(unsigned long)bytesInThisBuffer;
1906                 /*      setup write CCW         */
1907                 p_this_ccw->write.cmd_code = (linkid * 8) +1;
1908                 if (len_of_data>0) {
1909                         p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
1910                 }
1911                 p_this_ccw->write.count=bytesInThisBuffer;
1912                 /*      now add to end of this chain    */
1913                 if (p_first_ccw==NULL)    {
1914                         p_first_ccw=p_this_ccw;
1915                 }
1916                 if (p_last_ccw!=NULL) {
1917                         p_last_ccw->next=p_this_ccw;
1918                         /*      set up TIC ccws         */
1919                         p_last_ccw->w_TIC_1.cda=
1920                                 (__u32)__pa(&p_this_ccw->write);
1921                 }
1922                 p_last_ccw=p_this_ccw;      /* save new last block */
1923 #ifdef IOTRACE
1924                 printk(KERN_INFO "%s: %s() > CCW and Buffer %ld bytes long \n",
1925                         dev->name,__FUNCTION__,bytesInThisBuffer);
1926                 dumpit((char *)p_this_ccw, sizeof(struct ccwbk));
1927                 dumpit((char *)p_this_ccw->p_buffer, 64);
1928 #endif
1929         }
1930
1931         /*      FirstCCW and LastCCW now contain a new set of write channel
1932         *       programs to append to the running channel program
1933         */
1934
1935         if (p_first_ccw!=NULL) {
1936                 /*      setup ending ccw sequence for this segment              */
1937                 pEnd=privptr->p_end_ccw;
1938                 if (pEnd->write1) {
1939                         pEnd->write1=0x00;   /* second end ccw is now active */
1940                         /*      set up Tic CCWs         */
1941                         p_last_ccw->w_TIC_1.cda=
1942                                 (__u32)__pa(&pEnd->write2_nop1);
1943                         pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1944                         pEnd->write2_nop2.flags    =
1945                                 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1946                         pEnd->write2_nop2.cda=0;
1947                         pEnd->write2_nop2.count=1;
1948                 }
1949                 else {  /*  end of if (pEnd->write1)*/
1950                         pEnd->write1=0x01;   /* first end ccw is now active */
1951                         /*      set up Tic CCWs         */
1952                         p_last_ccw->w_TIC_1.cda=
1953                                 (__u32)__pa(&pEnd->write1_nop1);
1954                         pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1955                         pEnd->write1_nop2.flags    =
1956                                 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1957                         pEnd->write1_nop2.cda=0;
1958                         pEnd->write1_nop2.count=1;
1959                 }  /* end if if (pEnd->write1) */
1960
1961
1962                 if (privptr->p_write_active_first==NULL ) {
1963                         privptr->p_write_active_first=p_first_ccw;
1964                         privptr->p_write_active_last=p_last_ccw;
1965                 }
1966                 else {
1967
1968                         /*      set up Tic CCWs         */
1969
1970                         tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
1971                         tempCCW.count=0;
1972                         tempCCW.flags=0;
1973                         tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
1974
1975                         if (pEnd->write1) {
1976
1977                  /*
1978                  * first set of ending CCW's is chained to the new write
1979                  * chain, so the second set is chained to the active chain
1980                  * Therefore modify the second set to point the new write chain.
1981                  * make sure we update the CCW atomically
1982                  * so channel does not fetch it when it's only half done
1983                  */
1984                                 memcpy( &pEnd->write2_nop2, &tempCCW ,
1985                                         sizeof(struct ccw1));
1986                                 privptr->p_write_active_last->w_TIC_1.cda=
1987                                         (__u32)__pa(&p_first_ccw->write);
1988                         }
1989                         else {
1990
1991                         /*make sure we update the CCW atomically
1992                          *so channel does not fetch it when it's only half done
1993                          */
1994                                 memcpy(&pEnd->write1_nop2, &tempCCW ,
1995                                         sizeof(struct ccw1));
1996                                 privptr->p_write_active_last->w_TIC_1.cda=
1997                                         (__u32)__pa(&p_first_ccw->write);
1998
1999                         } /* end if if (pEnd->write1) */
2000
2001                         privptr->p_write_active_last->next=p_first_ccw;
2002                         privptr->p_write_active_last=p_last_ccw;
2003                 }
2004
2005         } /* endif (p_first_ccw!=NULL)  */
2006
2007
2008 #ifdef IOTRACE
2009         printk(KERN_INFO "%s: %s() >  Dump Active CCW chain \n",
2010                 dev->name,__FUNCTION__);
2011         p_buf=privptr->p_write_active_first;
2012         while (p_buf!=NULL) {
2013                 dumpit((char *)p_buf, sizeof(struct ccwbk));
2014                 p_buf=p_buf->next;
2015         }
2016         p_buf=(struct ccwbk*)privptr->p_end_ccw;
2017         dumpit((char *)p_buf, sizeof(struct endccw));
2018 #endif
2019         dev_kfree_skb_any(skb);
2020         if (linkid==0) {
2021                 lock=LOCK_NO;
2022         }
2023         else  {
2024                 lock=LOCK_YES;
2025         }
2026         claw_strt_out_IO(dev );
2027         /*      if write free count is zero , set NOBUFFER       */
2028 #ifdef DEBUGMSG
2029         printk(KERN_INFO "%s: %s() > free_count is %d\n",
2030                 dev->name,__FUNCTION__,
2031                 (int) privptr->write_free_count );
2032 #endif
2033         if (privptr->write_free_count==0) {
2034                 claw_setbit_busy(TB_NOBUFFER,dev);
2035         }
2036 Done2:
2037         claw_clearbit_busy(TB_TX,dev);
2038 Done:
2039 #ifdef FUNCTRACE
2040         printk(KERN_INFO "%s: %s() > exit on line %d, rc = %d \n",
2041                 dev->name,__FUNCTION__,__LINE__, rc);
2042 #endif
2043         return(rc);
2044 }    /*    end of claw_hw_tx    */
2045
2046 /*-------------------------------------------------------------------*
2047 *                                                                    *
2048 *     init_ccw_bk                                                    *
2049 *                                                                    *
2050 *--------------------------------------------------------------------*/
2051
2052 static int
2053 init_ccw_bk(struct net_device *dev)
2054 {
2055
2056         __u32   ccw_blocks_required;
2057         __u32   ccw_blocks_perpage;
2058         __u32   ccw_pages_required;
2059         __u32   claw_reads_perpage=1;
2060         __u32   claw_read_pages;
2061         __u32   claw_writes_perpage=1;
2062         __u32   claw_write_pages;
2063         void    *p_buff=NULL;
2064         struct ccwbk*p_free_chain;
2065         struct ccwbk*p_buf;
2066         struct ccwbk*p_last_CCWB;
2067         struct ccwbk*p_first_CCWB;
2068         struct endccw *p_endccw=NULL;
2069         addr_t  real_address;
2070         struct claw_privbk *privptr=dev->priv;
2071         struct clawh *pClawH=NULL;
2072         addr_t   real_TIC_address;
2073         int i,j;
2074 #ifdef FUNCTRACE
2075         printk(KERN_INFO "%s: %s() enter  \n",dev->name,__FUNCTION__);
2076 #endif
2077         CLAW_DBF_TEXT(4,trace,"init_ccw");
2078 #ifdef DEBUGMSG
2079         printk(KERN_INFO "%s: variable dev =\n",dev->name);
2080         dumpit((char *) dev, sizeof(struct net_device));
2081 #endif
2082
2083         /*  initialize  statistics field */
2084         privptr->active_link_ID=0;
2085         /*  initialize  ccwbk pointers  */
2086         privptr->p_write_free_chain=NULL;   /* pointer to free ccw chain*/
2087         privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
2088         privptr->p_write_active_last=NULL;  /* pointer to the last write ccw*/
2089         privptr->p_read_active_first=NULL;  /* pointer to the first read ccw*/
2090         privptr->p_read_active_last=NULL;   /* pointer to the last read ccw */
2091         privptr->p_end_ccw=NULL;            /* pointer to ending ccw        */
2092         privptr->p_claw_signal_blk=NULL;    /* pointer to signal block      */
2093         privptr->buffs_alloc = 0;
2094         memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
2095         memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
2096         /*  initialize  free write ccwbk counter  */
2097         privptr->write_free_count=0;  /* number of free bufs on write chain */
2098         p_last_CCWB = NULL;
2099         p_first_CCWB= NULL;
2100         /*
2101         *  We need 1 CCW block for each read buffer, 1 for each
2102         *  write buffer, plus 1 for ClawSignalBlock
2103         */
2104         ccw_blocks_required =
2105                 privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
2106 #ifdef DEBUGMSG
2107         printk(KERN_INFO "%s: %s() "
2108                 "ccw_blocks_required=%d\n",
2109                 dev->name,__FUNCTION__,
2110                 ccw_blocks_required);
2111         printk(KERN_INFO "%s: %s() "
2112                 "PAGE_SIZE=0x%x\n",
2113                 dev->name,__FUNCTION__,
2114                 (unsigned int)PAGE_SIZE);
2115         printk(KERN_INFO "%s: %s() > "
2116                 "PAGE_MASK=0x%x\n",
2117                 dev->name,__FUNCTION__,
2118                 (unsigned int)PAGE_MASK);
2119 #endif
2120         /*
2121         * compute number of CCW blocks that will fit in a page
2122         */
2123         ccw_blocks_perpage= PAGE_SIZE /  CCWBK_SIZE;
2124         ccw_pages_required=
2125                 (ccw_blocks_required+ccw_blocks_perpage -1) /
2126                          ccw_blocks_perpage;
2127
2128 #ifdef DEBUGMSG
2129         printk(KERN_INFO "%s: %s() > ccw_blocks_perpage=%d\n",
2130                 dev->name,__FUNCTION__,
2131                 ccw_blocks_perpage);
2132         printk(KERN_INFO "%s: %s() > ccw_pages_required=%d\n",
2133                 dev->name,__FUNCTION__,
2134                 ccw_pages_required);
2135 #endif
2136         /*
2137          *  read and write sizes are set by 2 constants in claw.h
2138          *  4k and 32k.  Unpacked values other than 4k are not going to
2139          * provide good performance. With packing buffers support 32k
2140          * buffers are used.
2141          */
2142         if (privptr->p_env->read_size < PAGE_SIZE) {
2143             claw_reads_perpage= PAGE_SIZE / privptr->p_env->read_size;
2144             claw_read_pages= (privptr->p_env->read_buffers +
2145                 claw_reads_perpage -1) / claw_reads_perpage;
2146          }
2147          else {       /* > or equal  */
2148             privptr->p_buff_pages_perread=
2149                 (privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
2150             claw_read_pages=
2151                 privptr->p_env->read_buffers * privptr->p_buff_pages_perread;
2152          }
2153         if (privptr->p_env->write_size < PAGE_SIZE) {
2154             claw_writes_perpage=
2155                 PAGE_SIZE / privptr->p_env->write_size;
2156             claw_write_pages=
2157                 (privptr->p_env->write_buffers + claw_writes_perpage -1) /
2158                         claw_writes_perpage;
2159
2160         }
2161         else {      /* >  or equal  */
2162             privptr->p_buff_pages_perwrite=
2163                  (privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
2164             claw_write_pages=
2165                 privptr->p_env->write_buffers * privptr->p_buff_pages_perwrite;
2166         }
2167 #ifdef DEBUGMSG
2168         if (privptr->p_env->read_size < PAGE_SIZE) {
2169             printk(KERN_INFO "%s: %s() reads_perpage=%d\n",
2170                 dev->name,__FUNCTION__,
2171                 claw_reads_perpage);
2172         }
2173         else {
2174             printk(KERN_INFO "%s: %s() pages_perread=%d\n",
2175                 dev->name,__FUNCTION__,
2176                 privptr->p_buff_pages_perread);
2177         }
2178         printk(KERN_INFO "%s: %s() read_pages=%d\n",
2179                 dev->name,__FUNCTION__,
2180                 claw_read_pages);
2181         if (privptr->p_env->write_size < PAGE_SIZE) {
2182             printk(KERN_INFO "%s: %s() writes_perpage=%d\n",
2183                 dev->name,__FUNCTION__,
2184                 claw_writes_perpage);
2185         }
2186         else {
2187             printk(KERN_INFO "%s: %s() pages_perwrite=%d\n",
2188                 dev->name,__FUNCTION__,
2189                 privptr->p_buff_pages_perwrite);
2190         }
2191         printk(KERN_INFO "%s: %s() write_pages=%d\n",
2192                 dev->name,__FUNCTION__,
2193                 claw_write_pages);
2194 #endif
2195
2196
2197         /*
2198         *               allocate ccw_pages_required
2199         */
2200         if (privptr->p_buff_ccw==NULL) {
2201                 privptr->p_buff_ccw=
2202                         (void *)__get_free_pages(__GFP_DMA,
2203                         (int)pages_to_order_of_mag(ccw_pages_required ));
2204                 if (privptr->p_buff_ccw==NULL) {
2205                         printk(KERN_INFO "%s: %s()  "
2206                                 "__get_free_pages for CCWs failed : "
2207                                 "pages is %d\n",
2208                                 dev->name,__FUNCTION__,
2209                                 ccw_pages_required );
2210 #ifdef FUNCTRACE
2211                         printk(KERN_INFO "%s: %s() > "
2212                                 "exit on line %d, rc = ENOMEM\n",
2213                                 dev->name,__FUNCTION__,
2214                                  __LINE__);
2215 #endif
2216                         return -ENOMEM;
2217                 }
2218                 privptr->p_buff_ccw_num=ccw_pages_required;
2219         }
2220         memset(privptr->p_buff_ccw, 0x00,
2221                 privptr->p_buff_ccw_num * PAGE_SIZE);
2222
2223         /*
2224         *               obtain ending ccw block address
2225         *
2226         */
2227         privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
2228         real_address  = (__u32)__pa(privptr->p_end_ccw);
2229         /*                              Initialize ending CCW block       */
2230 #ifdef DEBUGMSG
2231         printk(KERN_INFO "%s: %s() begin initialize ending CCW blocks\n",
2232                 dev->name,__FUNCTION__);
2233 #endif
2234
2235         p_endccw=privptr->p_end_ccw;
2236         p_endccw->real=real_address;
2237         p_endccw->write1=0x00;
2238         p_endccw->read1=0x00;
2239
2240         /*      write1_nop1                                     */
2241         p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2242         p_endccw->write1_nop1.flags       = CCW_FLAG_SLI | CCW_FLAG_CC;
2243         p_endccw->write1_nop1.count       = 1;
2244         p_endccw->write1_nop1.cda         = 0;
2245
2246         /*      write1_nop2                                     */
2247         p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2248         p_endccw->write1_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2249         p_endccw->write1_nop2.count      = 1;
2250         p_endccw->write1_nop2.cda        = 0;
2251
2252         /*      write2_nop1                                     */
2253         p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2254         p_endccw->write2_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
2255         p_endccw->write2_nop1.count        = 1;
2256         p_endccw->write2_nop1.cda          = 0;
2257
2258         /*      write2_nop2                                     */
2259         p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2260         p_endccw->write2_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2261         p_endccw->write2_nop2.count        = 1;
2262         p_endccw->write2_nop2.cda          = 0;
2263
2264         /*      read1_nop1                                      */
2265         p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2266         p_endccw->read1_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
2267         p_endccw->read1_nop1.count        = 1;
2268         p_endccw->read1_nop1.cda          = 0;
2269
2270         /*      read1_nop2                                      */
2271         p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2272         p_endccw->read1_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2273         p_endccw->read1_nop2.count        = 1;
2274         p_endccw->read1_nop2.cda          = 0;
2275
2276         /*      read2_nop1                                      */
2277         p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2278         p_endccw->read2_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
2279         p_endccw->read2_nop1.count        = 1;
2280         p_endccw->read2_nop1.cda          = 0;
2281
2282         /*      read2_nop2                                      */
2283         p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2284         p_endccw->read2_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2285         p_endccw->read2_nop2.count        = 1;
2286         p_endccw->read2_nop2.cda          = 0;
2287
2288 #ifdef IOTRACE
2289         printk(KERN_INFO "%s: %s() dump claw ending CCW BK \n",
2290                 dev->name,__FUNCTION__);
2291         dumpit((char *)p_endccw, sizeof(struct endccw));
2292 #endif
2293
2294         /*
2295         *                               Build a chain of CCWs
2296         *
2297         */
2298
2299 #ifdef DEBUGMSG
2300         printk(KERN_INFO "%s: %s()  Begin build a chain of CCW buffer \n",
2301                 dev->name,__FUNCTION__);
2302 #endif
2303         p_buff=privptr->p_buff_ccw;
2304
2305         p_free_chain=NULL;
2306         for (i=0 ; i < ccw_pages_required; i++ ) {
2307                 real_address  = (__u32)__pa(p_buff);
2308                 p_buf=p_buff;
2309                 for (j=0 ; j < ccw_blocks_perpage ; j++) {
2310                         p_buf->next  = p_free_chain;
2311                         p_free_chain = p_buf;
2312                         p_buf->real=(__u32)__pa(p_buf);
2313                         ++p_buf;
2314                 }
2315                 p_buff+=PAGE_SIZE;
2316         }
2317 #ifdef DEBUGMSG
2318         printk(KERN_INFO "%s: %s() "
2319                 "End build a chain of CCW buffer \n",
2320                         dev->name,__FUNCTION__);
2321         p_buf=p_free_chain;
2322         while (p_buf!=NULL) {
2323                 dumpit((char *)p_buf, sizeof(struct ccwbk));
2324                 p_buf=p_buf->next;
2325         }
2326 #endif
2327
2328         /*
2329         *                               Initialize ClawSignalBlock
2330         *
2331         */
2332 #ifdef DEBUGMSG
2333         printk(KERN_INFO "%s: %s() "
2334                 "Begin initialize ClawSignalBlock \n",
2335                 dev->name,__FUNCTION__);
2336 #endif
2337         if (privptr->p_claw_signal_blk==NULL) {
2338                 privptr->p_claw_signal_blk=p_free_chain;
2339                 p_free_chain=p_free_chain->next;
2340                 pClawH=(struct clawh *)privptr->p_claw_signal_blk;
2341                 pClawH->length=0xffff;
2342                 pClawH->opcode=0xff;
2343                 pClawH->flag=CLAW_BUSY;
2344         }
2345 #ifdef DEBUGMSG
2346         printk(KERN_INFO "%s: %s() >  End initialize "
2347                 "ClawSignalBlock\n",
2348                 dev->name,__FUNCTION__);
2349         dumpit((char *)privptr->p_claw_signal_blk, sizeof(struct ccwbk));
2350 #endif
2351
2352         /*
2353         *               allocate write_pages_required and add to free chain
2354         */
2355         if (privptr->p_buff_write==NULL) {
2356             if (privptr->p_env->write_size < PAGE_SIZE) {
2357                 privptr->p_buff_write=
2358                         (void *)__get_free_pages(__GFP_DMA,
2359                         (int)pages_to_order_of_mag(claw_write_pages ));
2360                 if (privptr->p_buff_write==NULL) {
2361                         printk(KERN_INFO "%s: %s() __get_free_pages for write"
2362                                 " bufs failed : get is for %d pages\n",
2363                                 dev->name,__FUNCTION__,claw_write_pages );
2364                         free_pages((unsigned long)privptr->p_buff_ccw,
2365                            (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
2366                         privptr->p_buff_ccw=NULL;
2367 #ifdef FUNCTRACE
2368                         printk(KERN_INFO "%s: %s() > exit on line %d,"
2369                                 "rc = ENOMEM\n",
2370                                 dev->name,__FUNCTION__,__LINE__);
2371 #endif
2372                         return -ENOMEM;
2373                 }
2374                 /*
2375                 *                               Build CLAW write free chain
2376                 *
2377                 */
2378
2379                 memset(privptr->p_buff_write, 0x00,
2380                         ccw_pages_required * PAGE_SIZE);
2381 #ifdef DEBUGMSG
2382                 printk(KERN_INFO "%s: %s() Begin build claw write free "
2383                         "chain \n",dev->name,__FUNCTION__);
2384 #endif
2385                 privptr->p_write_free_chain=NULL;
2386
2387                 p_buff=privptr->p_buff_write;
2388
2389                 for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
2390                         p_buf        = p_free_chain;      /*  get a CCW */
2391                         p_free_chain = p_buf->next;
2392                         p_buf->next  =privptr->p_write_free_chain;
2393                         privptr->p_write_free_chain = p_buf;
2394                         p_buf-> p_buffer        = (struct clawbuf *)p_buff;
2395                         p_buf-> write.cda       = (__u32)__pa(p_buff);
2396                         p_buf-> write.flags     = CCW_FLAG_SLI | CCW_FLAG_CC;
2397                         p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2398                         p_buf-> w_read_FF.flags   = CCW_FLAG_SLI | CCW_FLAG_CC;
2399                         p_buf-> w_read_FF.count   = 1;
2400                         p_buf-> w_read_FF.cda     =
2401                                 (__u32)__pa(&p_buf-> header.flag);
2402                         p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2403                         p_buf-> w_TIC_1.flags      = 0;
2404                         p_buf-> w_TIC_1.count      = 0;
2405
2406                         if (((unsigned long)p_buff+privptr->p_env->write_size) >=
2407                            ((unsigned long)(p_buff+2*
2408                                 (privptr->p_env->write_size) -1) & PAGE_MASK)) {
2409                         p_buff= p_buff+privptr->p_env->write_size;
2410                         }
2411                 }
2412            }
2413            else      /*  Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
2414            {
2415                privptr->p_write_free_chain=NULL;
2416                for (i = 0; i< privptr->p_env->write_buffers ; i++) {
2417                    p_buff=(void *)__get_free_pages(__GFP_DMA,
2418                         (int)pages_to_order_of_mag(
2419                         privptr->p_buff_pages_perwrite) );
2420 #ifdef IOTRACE
2421                    printk(KERN_INFO "%s:%s __get_free_pages "
2422                     "for writes buf: get for %d pages\n",
2423                     dev->name,__FUNCTION__,
2424                     privptr->p_buff_pages_perwrite);
2425 #endif
2426                    if (p_buff==NULL) {
2427                         printk(KERN_INFO "%s:%s __get_free_pages"
2428                                 "for writes buf failed : get is for %d pages\n",
2429                                 dev->name,
2430                                 __FUNCTION__,
2431                                 privptr->p_buff_pages_perwrite );
2432                         free_pages((unsigned long)privptr->p_buff_ccw,
2433                               (int)pages_to_order_of_mag(
2434                                         privptr->p_buff_ccw_num));
2435                         privptr->p_buff_ccw=NULL;
2436                         p_buf=privptr->p_buff_write;
2437                         while (p_buf!=NULL) {
2438                                 free_pages((unsigned long)
2439                                         p_buf->p_buffer,
2440                                         (int)pages_to_order_of_mag(
2441                                         privptr->p_buff_pages_perwrite));
2442                                 p_buf=p_buf->next;
2443                         }
2444 #ifdef FUNCTRACE
2445                         printk(KERN_INFO "%s: %s exit on line %d, rc = ENOMEM\n",
2446                         dev->name,
2447                         __FUNCTION__,
2448                         __LINE__);
2449 #endif
2450                         return -ENOMEM;
2451                    }  /* Error on get_pages   */
2452                    memset(p_buff, 0x00, privptr->p_env->write_size );
2453                    p_buf         = p_free_chain;
2454                    p_free_chain  = p_buf->next;
2455                    p_buf->next   = privptr->p_write_free_chain;
2456                    privptr->p_write_free_chain = p_buf;
2457                    privptr->p_buff_write = p_buf;
2458                    p_buf->p_buffer=(struct clawbuf *)p_buff;
2459                    p_buf-> write.cda     = (__u32)__pa(p_buff);
2460                    p_buf-> write.flags   = CCW_FLAG_SLI | CCW_FLAG_CC;
2461                    p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2462                    p_buf-> w_read_FF.flags    = CCW_FLAG_SLI | CCW_FLAG_CC;
2463                    p_buf-> w_read_FF.count    = 1;
2464                    p_buf-> w_read_FF.cda      =
2465                         (__u32)__pa(&p_buf-> header.flag);
2466                    p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2467                    p_buf-> w_TIC_1.flags   = 0;
2468                    p_buf-> w_TIC_1.count   = 0;
2469                }  /* for all write_buffers   */
2470
2471            }    /* else buffers are PAGE_SIZE or bigger */
2472
2473         }
2474         privptr->p_buff_write_num=claw_write_pages;
2475         privptr->write_free_count=privptr->p_env->write_buffers;
2476
2477
2478 #ifdef DEBUGMSG
2479         printk(KERN_INFO "%s:%s  End build claw write free chain \n",
2480         dev->name,__FUNCTION__);
2481         p_buf=privptr->p_write_free_chain;
2482         while (p_buf!=NULL) {
2483                 dumpit((char *)p_buf, sizeof(struct ccwbk));
2484                 p_buf=p_buf->next;
2485         }
2486 #endif
2487         /*
2488         *               allocate read_pages_required and chain to free chain
2489         */
2490         if (privptr->p_buff_read==NULL) {
2491             if (privptr->p_env->read_size < PAGE_SIZE)  {
2492                 privptr->p_buff_read=
2493                         (void *)__get_free_pages(__GFP_DMA,
2494                         (int)pages_to_order_of_mag(claw_read_pages) );
2495                 if (privptr->p_buff_read==NULL) {
2496                         printk(KERN_INFO "%s: %s() "
2497                                 "__get_free_pages for read buf failed : "
2498                                 "get is for %d pages\n",
2499                                 dev->name,__FUNCTION__,claw_read_pages );
2500                         free_pages((unsigned long)privptr->p_buff_ccw,
2501                                 (int)pages_to_order_of_mag(
2502                                         privptr->p_buff_ccw_num));
2503                         /* free the write pages size is < page size  */
2504                         free_pages((unsigned long)privptr->p_buff_write,
2505                                 (int)pages_to_order_of_mag(
2506                                 privptr->p_buff_write_num));
2507                         privptr->p_buff_ccw=NULL;
2508                         privptr->p_buff_write=NULL;
2509 #ifdef FUNCTRACE
2510                         printk(KERN_INFO "%s: %s() > exit on line %d, rc ="
2511                                 " ENOMEM\n",dev->name,__FUNCTION__,__LINE__);
2512 #endif
2513                         return -ENOMEM;
2514                 }
2515                 memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
2516                 privptr->p_buff_read_num=claw_read_pages;
2517                 /*
2518                 *                               Build CLAW read free chain
2519                 *
2520                 */
2521 #ifdef DEBUGMSG
2522                 printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
2523                         dev->name,__FUNCTION__);
2524 #endif
2525                 p_buff=privptr->p_buff_read;
2526                 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
2527                         p_buf        = p_free_chain;
2528                         p_free_chain = p_buf->next;
2529
2530                         if (p_last_CCWB==NULL) {
2531                                 p_buf->next=NULL;
2532                                 real_TIC_address=0;
2533                                 p_last_CCWB=p_buf;
2534                         }
2535                         else {
2536                                 p_buf->next=p_first_CCWB;
2537                                 real_TIC_address=
2538                                 (__u32)__pa(&p_first_CCWB -> read );
2539                         }
2540
2541                         p_first_CCWB=p_buf;
2542
2543                         p_buf->p_buffer=(struct clawbuf *)p_buff;
2544                         /*  initialize read command */
2545                         p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
2546                         p_buf-> read.cda = (__u32)__pa(p_buff);
2547                         p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2548                         p_buf-> read.count       = privptr->p_env->read_size;
2549
2550                         /*  initialize read_h command */
2551                         p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
2552                         p_buf-> read_h.cda =
2553                                 (__u32)__pa(&(p_buf->header));
2554                         p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2555                         p_buf-> read_h.count      = sizeof(struct clawh);
2556
2557                         /*  initialize Signal command */
2558                         p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
2559                         p_buf-> signal.cda =
2560                                 (__u32)__pa(&(pClawH->flag));
2561                         p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2562                         p_buf-> signal.count     = 1;
2563
2564                         /*  initialize r_TIC_1 command */
2565                         p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2566                         p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
2567                         p_buf-> r_TIC_1.flags = 0;
2568                         p_buf-> r_TIC_1.count      = 0;
2569
2570                         /*  initialize r_read_FF command */
2571                         p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2572                         p_buf-> r_read_FF.cda =
2573                                 (__u32)__pa(&(pClawH->flag));
2574                         p_buf-> r_read_FF.flags =
2575                                 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
2576                         p_buf-> r_read_FF.count    = 1;
2577
2578                         /*    initialize r_TIC_2          */
2579                         memcpy(&p_buf->r_TIC_2,
2580                                 &p_buf->r_TIC_1, sizeof(struct ccw1));
2581
2582                         /*     initialize Header     */
2583                         p_buf->header.length=0xffff;
2584                         p_buf->header.opcode=0xff;
2585                         p_buf->header.flag=CLAW_PENDING;
2586
2587                         if (((unsigned long)p_buff+privptr->p_env->read_size) >=
2588                                 ((unsigned long)(p_buff+2*(privptr->p_env->read_size) -1)
2589                                  & PAGE_MASK) ) {
2590                                 p_buff= p_buff+privptr->p_env->read_size;
2591                         }
2592                         else {
2593                                 p_buff=
2594                                 (void *)((unsigned long)
2595                                         (p_buff+2*(privptr->p_env->read_size) -1)
2596                                          & PAGE_MASK) ;
2597                         }
2598                 }   /* for read_buffers   */
2599           }         /* read_size < PAGE_SIZE  */
2600           else {  /* read Size >= PAGE_SIZE  */
2601
2602 #ifdef DEBUGMSG
2603         printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
2604                 dev->name,__FUNCTION__);
2605 #endif
2606                 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
2607                         p_buff = (void *)__get_free_pages(__GFP_DMA,
2608                                 (int)pages_to_order_of_mag(privptr->p_buff_pages_perread) );
2609                         if (p_buff==NULL) {
2610                                 printk(KERN_INFO "%s: %s() __get_free_pages for read "
2611                                         "buf failed : get is for %d pages\n",
2612                                         dev->name,__FUNCTION__,
2613                                         privptr->p_buff_pages_perread );
2614                                 free_pages((unsigned long)privptr->p_buff_ccw,
2615                                         (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
2616                                 /* free the write pages  */
2617                                 p_buf=privptr->p_buff_write;
2618                                 while (p_buf!=NULL) {
2619                                         free_pages((unsigned long)p_buf->p_buffer,
2620                                                 (int)pages_to_order_of_mag(
2621                                                 privptr->p_buff_pages_perwrite ));
2622                                         p_buf=p_buf->next;
2623                                 }
2624                                 /* free any read pages already alloc  */
2625                                 p_buf=privptr->p_buff_read;
2626                                 while (p_buf!=NULL) {
2627                                         free_pages((unsigned long)p_buf->p_buffer,
2628                                                 (int)pages_to_order_of_mag(
2629                                                 privptr->p_buff_pages_perread ));
2630                                         p_buf=p_buf->next;
2631                                 }
2632                                 privptr->p_buff_ccw=NULL;
2633                                 privptr->p_buff_write=NULL;
2634 #ifdef FUNCTRACE
2635                                 printk(KERN_INFO "%s: %s() exit on line %d, rc = ENOMEM\n",
2636                                         dev->name,__FUNCTION__,
2637                                         __LINE__);
2638 #endif
2639                                 return -ENOMEM;
2640                         }
2641                         memset(p_buff, 0x00, privptr->p_env->read_size);
2642                         p_buf        = p_free_chain;
2643                         privptr->p_buff_read = p_buf;
2644                         p_free_chain = p_buf->next;
2645
2646                         if (p_last_CCWB==NULL) {
2647                                 p_buf->next=NULL;
2648                                 real_TIC_address=0;
2649                                 p_last_CCWB=p_buf;
2650                         }
2651                         else {
2652                                 p_buf->next=p_first_CCWB;
2653                                 real_TIC_address=
2654                                         (addr_t)__pa(
2655                                                 &p_first_CCWB -> read );
2656                         }
2657
2658                         p_first_CCWB=p_buf;
2659                                 /* save buff address */
2660                         p_buf->p_buffer=(struct clawbuf *)p_buff;
2661                         /*  initialize read command */
2662                         p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
2663                         p_buf-> read.cda = (__u32)__pa(p_buff);
2664                         p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2665                         p_buf-> read.count       = privptr->p_env->read_size;
2666
2667                         /*  initialize read_h command */
2668                         p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
2669                         p_buf-> read_h.cda =
2670                                 (__u32)__pa(&(p_buf->header));
2671                         p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2672                         p_buf-> read_h.count      = sizeof(struct clawh);
2673
2674                         /*  initialize Signal command */
2675                         p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
2676                         p_buf-> signal.cda =
2677                                 (__u32)__pa(&(pClawH->flag));
2678                         p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2679                         p_buf-> signal.count     = 1;
2680
2681                         /*  initialize r_TIC_1 command */
2682                         p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2683                         p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
2684                         p_buf-> r_TIC_1.flags = 0;
2685                         p_buf-> r_TIC_1.count      = 0;
2686
2687                         /*  initialize r_read_FF command */
2688                         p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2689                         p_buf-> r_read_FF.cda =
2690                                 (__u32)__pa(&(pClawH->flag));
2691                         p_buf-> r_read_FF.flags =
2692                                 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
2693                         p_buf-> r_read_FF.count    = 1;
2694
2695                         /*    initialize r_TIC_2          */
2696                         memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
2697                                 sizeof(struct ccw1));
2698
2699                         /*     initialize Header     */
2700                         p_buf->header.length=0xffff;
2701                         p_buf->header.opcode=0xff;
2702                         p_buf->header.flag=CLAW_PENDING;
2703
2704                 }    /* For read_buffers   */
2705           }     /*  read_size >= PAGE_SIZE   */
2706         }       /*  pBuffread = NULL */
2707 #ifdef DEBUGMSG
2708         printk(KERN_INFO "%s: %s() >  End build claw read free chain \n",
2709                 dev->name,__FUNCTION__);
2710         p_buf=p_first_CCWB;
2711         while (p_buf!=NULL) {
2712                 dumpit((char *)p_buf, sizeof(struct ccwbk));
2713                 p_buf=p_buf->next;
2714         }
2715
2716 #endif
2717         add_claw_reads( dev  ,p_first_CCWB , p_last_CCWB);
2718         privptr->buffs_alloc = 1;
2719 #ifdef FUNCTRACE
2720         printk(KERN_INFO "%s: %s() exit on line %d\n",
2721                 dev->name,__FUNCTION__,__LINE__);
2722 #endif
2723         return 0;
2724 }    /*    end of init_ccw_bk */
2725
2726 /*-------------------------------------------------------------------*
2727 *                                                                    *
2728 *       probe_error                                                  *
2729 *                                                                    *
2730 *--------------------------------------------------------------------*/
2731
2732 static void
2733 probe_error( struct ccwgroup_device *cgdev)
2734 {
2735   struct claw_privbk *privptr;
2736 #ifdef FUNCTRACE
2737         printk(KERN_INFO "%s enter  \n",__FUNCTION__);
2738 #endif
2739         CLAW_DBF_TEXT(4,trace,"proberr");
2740 #ifdef DEBUGMSG
2741         printk(KERN_INFO "%s variable cgdev =\n",__FUNCTION__);
2742         dumpit((char *) cgdev, sizeof(struct ccwgroup_device));
2743 #endif
2744         privptr=(struct claw_privbk *)cgdev->dev.driver_data;
2745         if (privptr!=NULL) {
2746                 if (privptr->p_env != NULL) {
2747                         kfree(privptr->p_env);
2748                         privptr->p_env=NULL;
2749                 }
2750                 if (privptr->p_mtc_envelope!=NULL) {
2751                         kfree(privptr->p_mtc_envelope);
2752                         privptr->p_mtc_envelope=NULL;
2753                 }
2754                 kfree(privptr);
2755                 privptr=NULL;
2756         }
2757 #ifdef FUNCTRACE
2758         printk(KERN_INFO "%s > exit on line %d\n",
2759                  __FUNCTION__,__LINE__);
2760 #endif
2761
2762         return;
2763 }    /*    probe_error    */
2764
2765
2766
2767 /*-------------------------------------------------------------------*
2768 *    claw_process_control                                            *
2769 *                                                                    *
2770 *                                                                    *
2771 *--------------------------------------------------------------------*/
2772
2773 static int
2774 claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
2775 {
2776
2777         struct clawbuf *p_buf;
2778         struct clawctl  ctlbk;
2779         struct clawctl *p_ctlbk;
2780         char    temp_host_name[8];
2781         char    temp_ws_name[8];
2782         struct claw_privbk *privptr;
2783         struct claw_env *p_env;
2784         struct sysval *p_sysval;
2785         struct conncmd *p_connect=NULL;
2786         int rc;
2787         struct chbk *p_ch = NULL;
2788 #ifdef FUNCTRACE
2789         printk(KERN_INFO "%s: %s() > enter  \n",
2790                 dev->name,__FUNCTION__);
2791 #endif
2792         CLAW_DBF_TEXT(2,setup,"clw_cntl");
2793 #ifdef DEBUGMSG
2794         printk(KERN_INFO "%s: variable dev =\n",dev->name);
2795         dumpit((char *) dev, sizeof(struct net_device));
2796         printk(KERN_INFO "%s: variable p_ccw =\n",dev->name);
2797         dumpit((char *) p_ccw, sizeof(struct ccwbk *));
2798 #endif
2799         udelay(1000);  /* Wait a ms for the control packets to
2800                         *catch up to each other */
2801         privptr=dev->priv;
2802         p_env=privptr->p_env;
2803         memcpy( &temp_host_name, p_env->host_name, 8);
2804         memcpy( &temp_ws_name, p_env->adapter_name , 8);
2805         printk(KERN_INFO "%s: CLAW device %.8s: "
2806                 "Received Control Packet\n",
2807                 dev->name, temp_ws_name);
2808         if (privptr->release_pend==1) {
2809 #ifdef FUNCTRACE
2810                 printk(KERN_INFO "%s: %s() > "
2811                         "exit on line %d, rc=0\n",
2812                         dev->name,__FUNCTION__,__LINE__);
2813 #endif
2814                 return 0;
2815         }
2816         p_buf=p_ccw->p_buffer;
2817         p_ctlbk=&ctlbk;
2818         if (p_env->packing == DO_PACKED) { /* packing in progress?*/
2819                 memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
2820         } else {
2821                 memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
2822         }
2823 #ifdef IOTRACE
2824         printk(KERN_INFO "%s: dump claw control data inbound\n",dev->name);
2825         dumpit((char *)p_ctlbk, sizeof(struct clawctl));
2826 #endif
2827         switch (p_ctlbk->command)
2828         {
2829                 case SYSTEM_VALIDATE_REQUEST:
2830                         if (p_ctlbk->version!=CLAW_VERSION_ID) {
2831                                 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2832                                         CLAW_RC_WRONG_VERSION );
2833                                 printk("%s: %d is wrong version id. "
2834                                         "Expected %d\n",
2835                                         dev->name, p_ctlbk->version,
2836                                         CLAW_VERSION_ID);
2837                         }
2838                         p_sysval=(struct sysval *)&(p_ctlbk->data);
2839                         printk( "%s: Recv Sys Validate Request: "
2840                                 "Vers=%d,link_id=%d,Corr=%d,WS name=%."
2841                                 "8s,Host name=%.8s\n",
2842                                 dev->name, p_ctlbk->version,
2843                                 p_ctlbk->linkid,
2844                                 p_ctlbk->correlator,
2845                                 p_sysval->WS_name,
2846                                 p_sysval->host_name);
2847                         if (0!=memcmp(temp_host_name,p_sysval->host_name,8)) {
2848                                 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2849                                         CLAW_RC_NAME_MISMATCH );
2850                                 CLAW_DBF_TEXT(2,setup,"HSTBAD");
2851                                 CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->host_name);
2852                                 CLAW_DBF_TEXT_(2,setup,"%s",temp_host_name);
2853                                 printk(KERN_INFO "%s:  Host name mismatch\n",
2854                                         dev->name);
2855                                 printk(KERN_INFO "%s: Received :%s: "
2856                                         "expected :%s: \n",
2857                                         dev->name,
2858                                         p_sysval->host_name,
2859                                         temp_host_name);
2860                         }
2861                         if (0!=memcmp(temp_ws_name,p_sysval->WS_name,8)) {
2862                                 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2863                                         CLAW_RC_NAME_MISMATCH );
2864                                 CLAW_DBF_TEXT(2,setup,"WSNBAD");
2865                                 CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->WS_name);
2866                                 CLAW_DBF_TEXT_(2,setup,"%s",temp_ws_name);
2867                                 printk(KERN_INFO "%s: WS name mismatch\n",
2868                                         dev->name);
2869                                  printk(KERN_INFO "%s: Received :%s: "
2870                                         "expected :%s: \n",
2871                                         dev->name,
2872                                         p_sysval->WS_name,
2873                                         temp_ws_name);
2874                         }
2875                         if (( p_sysval->write_frame_size < p_env->write_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 write size is too "
2880                                         "small\n", dev->name);
2881                                 CLAW_DBF_TEXT(2,setup,"wrtszbad");
2882                         }
2883                         if (( p_sysval->read_frame_size < p_env->read_size) &&
2884                            ( p_env->packing == 0)) {
2885                                 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2886                                         CLAW_RC_HOST_RCV_TOO_SMALL );
2887                                 printk(KERN_INFO "%s: host read size is too "
2888                                         "small\n", dev->name);
2889                                 CLAW_DBF_TEXT(2,setup,"rdsizbad");
2890                         }
2891                         claw_snd_sys_validate_rsp(dev, p_ctlbk, 0 );
2892                         printk("%s: CLAW device %.8s: System validate"
2893                                 " completed.\n",dev->name, temp_ws_name);
2894                         printk("%s: sys Validate Rsize:%d Wsize:%d\n",dev->name,
2895                                 p_sysval->read_frame_size,p_sysval->write_frame_size);
2896                         privptr->system_validate_comp=1;
2897                         if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
2898                                 p_env->packing = PACKING_ASK;
2899                         }
2900                         claw_strt_conn_req(dev);
2901                         break;
2902
2903                 case SYSTEM_VALIDATE_RESPONSE:
2904                         p_sysval=(struct sysval *)&(p_ctlbk->data);
2905                         printk("%s: Recv Sys Validate Resp: Vers=%d,Corr=%d,RC=%d,"
2906                                 "WS name=%.8s,Host name=%.8s\n",
2907                                 dev->name,
2908                                 p_ctlbk->version,
2909                                 p_ctlbk->correlator,
2910                                 p_ctlbk->rc,
2911                                 p_sysval->WS_name,
2912                                 p_sysval->host_name);
2913                         switch (p_ctlbk->rc)
2914                         {
2915                                 case 0:
2916                                         printk(KERN_INFO "%s: CLAW device "
2917                                                 "%.8s: System validate "
2918                                                 "completed.\n",
2919                                                 dev->name, temp_ws_name);
2920                                         if (privptr->system_validate_comp == 0)
2921                                                 claw_strt_conn_req(dev);
2922                                         privptr->system_validate_comp=1;
2923                                         break;
2924                                 case CLAW_RC_NAME_MISMATCH:
2925                                         printk(KERN_INFO "%s: Sys Validate "
2926                                                 "Resp : Host, WS name is "
2927                                                 "mismatch\n",
2928                                                 dev->name);
2929                                         break;
2930                                 case CLAW_RC_WRONG_VERSION:
2931                                         printk(KERN_INFO "%s: Sys Validate "
2932                                                 "Resp : Wrong version\n",
2933                                                 dev->name);
2934                                         break;
2935                                 case CLAW_RC_HOST_RCV_TOO_SMALL:
2936                                         printk(KERN_INFO "%s: Sys Validate "
2937                                                 "Resp : bad frame size\n",
2938                                                 dev->name);
2939                                         break;
2940                                 default:
2941                                         printk(KERN_INFO "%s: Sys Validate "
2942                                                 "error code=%d \n",
2943                                                  dev->name, p_ctlbk->rc );
2944                                         break;
2945                         }
2946                         break;
2947
2948                 case CONNECTION_REQUEST:
2949                         p_connect=(struct conncmd *)&(p_ctlbk->data);
2950                         printk(KERN_INFO "%s: Recv Conn Req: Vers=%d,link_id=%d,"
2951                                 "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
2952                                 dev->name,
2953                                 p_ctlbk->version,
2954                                 p_ctlbk->linkid,
2955                                 p_ctlbk->correlator,
2956                                 p_connect->host_name,
2957                                 p_connect->WS_name);
2958                         if (privptr->active_link_ID!=0 ) {
2959                                 claw_snd_disc(dev, p_ctlbk);
2960                                 printk(KERN_INFO "%s: Conn Req error : "
2961                                         "already logical link is active \n",
2962                                         dev->name);
2963                         }
2964                         if (p_ctlbk->linkid!=1 ) {
2965                                 claw_snd_disc(dev, p_ctlbk);
2966                                 printk(KERN_INFO "%s: Conn Req error : "
2967                                         "req logical link id is not 1\n",
2968                                         dev->name);
2969                         }
2970                         rc=find_link(dev,
2971                                 p_connect->host_name, p_connect->WS_name);
2972                         if (rc!=0) {
2973                                 claw_snd_disc(dev, p_ctlbk);
2974                                 printk(KERN_INFO "%s: Conn Req error : "
2975                                         "req appl name does not match\n",
2976                                          dev->name);
2977                         }
2978                         claw_send_control(dev,
2979                                 CONNECTION_CONFIRM, p_ctlbk->linkid,
2980                                 p_ctlbk->correlator,
2981                                 0, p_connect->host_name,
2982                                 p_connect->WS_name);
2983                         if (p_env->packing == PACKING_ASK) {
2984                                 printk("%s: Now Pack ask\n",dev->name);
2985                                 p_env->packing = PACK_SEND;
2986                                 claw_snd_conn_req(dev,0);
2987                         }
2988                         printk(KERN_INFO "%s: CLAW device %.8s: Connection "
2989                                 "completed link_id=%d.\n",
2990                                 dev->name, temp_ws_name,
2991                                 p_ctlbk->linkid);
2992                         privptr->active_link_ID=p_ctlbk->linkid;
2993                         p_ch=&privptr->channel[WRITE];
2994                         wake_up(&p_ch->wait);  /* wake up claw_open ( WRITE) */
2995                         break;
2996                 case CONNECTION_RESPONSE:
2997                         p_connect=(struct conncmd *)&(p_ctlbk->data);
2998                         printk(KERN_INFO "%s: Revc Conn Resp: Vers=%d,link_id=%d,"
2999                                 "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
3000                                 dev->name,
3001                                 p_ctlbk->version,
3002                                 p_ctlbk->linkid,
3003                                 p_ctlbk->correlator,
3004                                 p_ctlbk->rc,
3005                                 p_connect->host_name,
3006                                 p_connect->WS_name);
3007
3008                         if (p_ctlbk->rc !=0 ) {
3009                                 printk(KERN_INFO "%s: Conn Resp error: rc=%d \n",
3010                                         dev->name, p_ctlbk->rc);
3011                                 return 1;
3012                         }
3013                         rc=find_link(dev,
3014                                 p_connect->host_name, p_connect->WS_name);
3015                         if (rc!=0) {
3016                                 claw_snd_disc(dev, p_ctlbk);
3017                                 printk(KERN_INFO "%s: Conn Resp error: "
3018                                         "req appl name does not match\n",
3019                                          dev->name);
3020                         }
3021                         /* should be until CONNECTION_CONFIRM */
3022                         privptr->active_link_ID =  - (p_ctlbk->linkid);
3023                         break;
3024                 case CONNECTION_CONFIRM:
3025                         p_connect=(struct conncmd *)&(p_ctlbk->data);
3026                         printk(KERN_INFO "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
3027                                 "Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
3028                         dev->name,
3029                         p_ctlbk->version,
3030                         p_ctlbk->linkid,
3031                         p_ctlbk->correlator,
3032                         p_connect->host_name,
3033                         p_connect->WS_name);
3034                         if (p_ctlbk->linkid== -(privptr->active_link_ID)) {
3035                                 privptr->active_link_ID=p_ctlbk->linkid;
3036                                 if (p_env->packing > PACKING_ASK) {
3037                                         printk(KERN_INFO "%s: Confirmed Now packing\n",dev->name);
3038                                         p_env->packing = DO_PACKED;
3039                                         }
3040                                 p_ch=&privptr->channel[WRITE];
3041                                 wake_up(&p_ch->wait);
3042                         }
3043                         else {
3044                                 printk(KERN_INFO "%s: Conn confirm: "
3045                                         "unexpected linkid=%d \n",
3046                                         dev->name, p_ctlbk->linkid);
3047                                 claw_snd_disc(dev, p_ctlbk);
3048                         }
3049                         break;
3050                 case DISCONNECT:
3051                         printk(KERN_INFO "%s: Disconnect: "
3052                                 "Vers=%d,link_id=%d,Corr=%d\n",
3053                                 dev->name, p_ctlbk->version,
3054                                 p_ctlbk->linkid, p_ctlbk->correlator);
3055                         if ((p_ctlbk->linkid == 2) &&
3056                             (p_env->packing == PACK_SEND)) {
3057                                 privptr->active_link_ID = 1;
3058                                 p_env->packing = DO_PACKED;
3059                         }
3060                         else
3061                                 privptr->active_link_ID=0;
3062                         break;
3063                 case CLAW_ERROR:
3064                         printk(KERN_INFO "%s: CLAW ERROR detected\n",
3065                                 dev->name);
3066                         break;
3067                 default:
3068                         printk(KERN_INFO "%s:  Unexpected command code=%d \n",
3069                                 dev->name,  p_ctlbk->command);
3070                         break;
3071         }
3072
3073 #ifdef FUNCTRACE
3074         printk(KERN_INFO "%s: %s() exit on line %d, rc = 0\n",
3075                 dev->name,__FUNCTION__,__LINE__);
3076 #endif
3077
3078         return 0;
3079 }   /*    end of claw_process_control    */
3080
3081
3082 /*-------------------------------------------------------------------*
3083 *               claw_send_control                                    *
3084 *                                                                    *
3085 *--------------------------------------------------------------------*/
3086
3087 static int
3088 claw_send_control(struct net_device *dev, __u8 type, __u8 link,
3089          __u8 correlator, __u8 rc, char *local_name, char *remote_name)
3090 {
3091         struct claw_privbk              *privptr;
3092         struct clawctl                  *p_ctl;
3093         struct sysval                   *p_sysval;
3094         struct conncmd                  *p_connect;
3095         struct sk_buff                  *skb;
3096
3097 #ifdef FUNCTRACE
3098         printk(KERN_INFO "%s:%s > enter  \n",dev->name,__FUNCTION__);
3099 #endif
3100         CLAW_DBF_TEXT(2,setup,"sndcntl");
3101 #ifdef DEBUGMSG
3102         printk(KERN_INFO "%s: Sending Control Packet \n",dev->name);
3103         printk(KERN_INFO "%s: variable type = 0x%X, link = "
3104                 "%d, correlator = %d, rc = %d\n",
3105                 dev->name,type, link, correlator, rc);
3106         printk(KERN_INFO "%s: variable local_name = %s, "
3107                 "remote_name = %s\n",dev->name, local_name, remote_name);
3108 #endif
3109         privptr=dev->priv;
3110         p_ctl=(struct clawctl *)&privptr->ctl_bk;
3111
3112         p_ctl->command=type;
3113         p_ctl->version=CLAW_VERSION_ID;
3114         p_ctl->linkid=link;
3115         p_ctl->correlator=correlator;
3116         p_ctl->rc=rc;
3117
3118         p_sysval=(struct sysval *)&p_ctl->data;
3119         p_connect=(struct conncmd *)&p_ctl->data;
3120
3121         switch (p_ctl->command) {
3122                 case SYSTEM_VALIDATE_REQUEST:
3123                 case SYSTEM_VALIDATE_RESPONSE:
3124                         memcpy(&p_sysval->host_name, local_name, 8);
3125                         memcpy(&p_sysval->WS_name, remote_name, 8);
3126                         if (privptr->p_env->packing > 0) {
3127                                 p_sysval->read_frame_size=DEF_PACK_BUFSIZE;
3128                                 p_sysval->write_frame_size=DEF_PACK_BUFSIZE;
3129                         } else {
3130                                 /* how big is the piggest group of packets */
3131                                 p_sysval->read_frame_size=privptr->p_env->read_size;
3132                                 p_sysval->write_frame_size=privptr->p_env->write_size;
3133                         }
3134                         memset(&p_sysval->reserved, 0x00, 4);
3135                         break;
3136                 case CONNECTION_REQUEST:
3137                 case CONNECTION_RESPONSE:
3138                 case CONNECTION_CONFIRM:
3139                 case DISCONNECT:
3140                         memcpy(&p_sysval->host_name, local_name, 8);
3141                         memcpy(&p_sysval->WS_name, remote_name, 8);
3142                         if (privptr->p_env->packing > 0) {
3143                         /* How big is the biggest packet */
3144                                 p_connect->reserved1[0]=CLAW_FRAME_SIZE;
3145                                 p_connect->reserved1[1]=CLAW_FRAME_SIZE;
3146                         } else {
3147                                 memset(&p_connect->reserved1, 0x00, 4);
3148                                 memset(&p_connect->reserved2, 0x00, 4);
3149                         }
3150                         break;
3151                 default:
3152                         break;
3153         }
3154
3155         /*      write Control Record to the device                   */
3156
3157
3158         skb = dev_alloc_skb(sizeof(struct clawctl));
3159         if (!skb) {
3160                 printk(  "%s:%s low on mem, returning...\n",
3161                         dev->name,__FUNCTION__);
3162 #ifdef DEBUG
3163                 printk(KERN_INFO "%s:%s Exit, rc = ENOMEM\n",
3164                         dev->name,__FUNCTION__);
3165 #endif
3166                 return -ENOMEM;
3167         }
3168         memcpy(skb_put(skb, sizeof(struct clawctl)),
3169                 p_ctl, sizeof(struct clawctl));
3170 #ifdef IOTRACE
3171          printk(KERN_INFO "%s: outbnd claw cntl data \n",dev->name);
3172         dumpit((char *)p_ctl,sizeof(struct clawctl));
3173 #endif
3174         if (privptr->p_env->packing >= PACK_SEND)
3175                 claw_hw_tx(skb, dev, 1);
3176         else
3177                 claw_hw_tx(skb, dev, 0);
3178 #ifdef FUNCTRACE
3179         printk(KERN_INFO "%s:%s Exit on line %d\n",
3180                 dev->name,__FUNCTION__,__LINE__);
3181 #endif
3182
3183         return 0;
3184 }  /*   end of claw_send_control  */
3185
3186 /*-------------------------------------------------------------------*
3187 *               claw_snd_conn_req                                    *
3188 *                                                                    *
3189 *--------------------------------------------------------------------*/
3190 static int
3191 claw_snd_conn_req(struct net_device *dev, __u8 link)
3192 {
3193         int                rc;
3194         struct claw_privbk *privptr=dev->priv;
3195         struct clawctl     *p_ctl;
3196
3197 #ifdef FUNCTRACE
3198         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
3199 #endif
3200         CLAW_DBF_TEXT(2,setup,"snd_conn");
3201 #ifdef  DEBUGMSG
3202         printk(KERN_INFO "%s: variable link = %X, dev =\n",dev->name, link);
3203         dumpit((char *) dev, sizeof(struct net_device));
3204 #endif
3205         rc = 1;
3206         p_ctl=(struct clawctl *)&privptr->ctl_bk;
3207         p_ctl->linkid = link;
3208         if ( privptr->system_validate_comp==0x00 ) {
3209 #ifdef FUNCTRACE
3210                 printk(KERN_INFO "%s:%s Exit on line %d, rc = 1\n",
3211                         dev->name,__FUNCTION__,__LINE__);
3212 #endif
3213                 return rc;
3214         }
3215         if (privptr->p_env->packing == PACKING_ASK )
3216                 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3217                         WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
3218         if (privptr->p_env->packing == PACK_SEND)  {
3219                 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3220                         WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
3221         }
3222         if (privptr->p_env->packing == 0)
3223                 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3224                         HOST_APPL_NAME, privptr->p_env->api_type);
3225 #ifdef FUNCTRACE
3226         printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3227                 dev->name,__FUNCTION__,__LINE__, rc);
3228 #endif
3229         return rc;
3230
3231 }  /*  end of claw_snd_conn_req */
3232
3233
3234 /*-------------------------------------------------------------------*
3235 *               claw_snd_disc                                        *
3236 *                                                                    *
3237 *--------------------------------------------------------------------*/
3238
3239 static int
3240 claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
3241 {
3242         int rc;
3243         struct conncmd *  p_connect;
3244
3245 #ifdef FUNCTRACE
3246         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3247 #endif
3248         CLAW_DBF_TEXT(2,setup,"snd_dsc");
3249 #ifdef  DEBUGMSG
3250         printk(KERN_INFO "%s: variable dev =\n",dev->name);
3251         dumpit((char *) dev, sizeof(struct net_device));
3252         printk(KERN_INFO "%s: variable p_ctl",dev->name);
3253         dumpit((char *) p_ctl, sizeof(struct clawctl));
3254 #endif
3255         p_connect=(struct conncmd *)&p_ctl->data;
3256
3257         rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
3258                 p_ctl->correlator, 0,
3259                 p_connect->host_name, p_connect->WS_name);
3260 #ifdef FUNCTRACE
3261         printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3262                 dev->name,__FUNCTION__, __LINE__, rc);
3263 #endif
3264         return rc;
3265 }     /*   end of claw_snd_disc    */
3266
3267
3268 /*-------------------------------------------------------------------*
3269 *               claw_snd_sys_validate_rsp                            *
3270 *                                                                    *
3271 *--------------------------------------------------------------------*/
3272
3273 static int
3274 claw_snd_sys_validate_rsp(struct net_device *dev,
3275         struct clawctl *p_ctl, __u32 return_code)
3276 {
3277         struct claw_env *  p_env;
3278         struct claw_privbk *privptr;
3279         int    rc;
3280
3281 #ifdef FUNCTRACE
3282         printk(KERN_INFO "%s:%s Enter\n",
3283                 dev->name,__FUNCTION__);
3284 #endif
3285         CLAW_DBF_TEXT(2,setup,"chkresp");
3286 #ifdef DEBUGMSG
3287         printk(KERN_INFO "%s: variable return_code = %d, dev =\n",
3288                 dev->name, return_code);
3289         dumpit((char *) dev, sizeof(struct net_device));
3290         printk(KERN_INFO "%s: variable p_ctl =\n",dev->name);
3291         dumpit((char *) p_ctl, sizeof(struct clawctl));
3292 #endif
3293         privptr = dev->priv;
3294         p_env=privptr->p_env;
3295         rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
3296                 p_ctl->linkid,
3297                 p_ctl->correlator,
3298                 return_code,
3299                 p_env->host_name,
3300                 p_env->adapter_name  );
3301 #ifdef FUNCTRACE
3302         printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3303                 dev->name,__FUNCTION__,__LINE__, rc);
3304 #endif
3305         return rc;
3306 }     /*    end of claw_snd_sys_validate_rsp    */
3307
3308 /*-------------------------------------------------------------------*
3309 *               claw_strt_conn_req                                   *
3310 *                                                                    *
3311 *--------------------------------------------------------------------*/
3312
3313 static int
3314 claw_strt_conn_req(struct net_device *dev )
3315 {
3316         int rc;
3317
3318 #ifdef FUNCTRACE
3319         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3320 #endif
3321         CLAW_DBF_TEXT(2,setup,"conn_req");
3322 #ifdef DEBUGMSG
3323         printk(KERN_INFO "%s: variable dev =\n",dev->name);
3324         dumpit((char *) dev, sizeof(struct net_device));
3325 #endif
3326         rc=claw_snd_conn_req(dev, 1);
3327 #ifdef FUNCTRACE
3328         printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3329                 dev->name,__FUNCTION__,__LINE__, rc);
3330 #endif
3331         return rc;
3332 }    /*   end of claw_strt_conn_req   */
3333
3334
3335
3336 /*-------------------------------------------------------------------*
3337  *   claw_stats                                                      *
3338  *-------------------------------------------------------------------*/
3339
3340 static struct
3341 net_device_stats *claw_stats(struct net_device *dev)
3342 {
3343         struct claw_privbk *privptr;
3344 #ifdef FUNCTRACE
3345         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3346 #endif
3347         CLAW_DBF_TEXT(4,trace,"stats");
3348         privptr = dev->priv;
3349 #ifdef FUNCTRACE
3350         printk(KERN_INFO "%s:%s Exit on line %d\n",
3351                 dev->name,__FUNCTION__,__LINE__);
3352 #endif
3353         return &privptr->stats;
3354 }     /*   end of claw_stats   */
3355
3356
3357 /*-------------------------------------------------------------------*
3358 *       unpack_read                                                  *
3359 *                                                                    *
3360 *--------------------------------------------------------------------*/
3361 static void
3362 unpack_read(struct net_device *dev )
3363 {
3364         struct sk_buff *skb;
3365         struct claw_privbk *privptr;
3366         struct claw_env    *p_env;
3367         struct ccwbk    *p_this_ccw;
3368         struct ccwbk    *p_first_ccw;
3369         struct ccwbk    *p_last_ccw;
3370         struct clawph   *p_packh;
3371         void            *p_packd;
3372         struct clawctl  *p_ctlrec=NULL;
3373
3374         __u32   len_of_data;
3375         __u32   pack_off;
3376         __u8    link_num;
3377         __u8    mtc_this_frm=0;
3378         __u32   bytes_to_mov;
3379         struct chbk *p_ch = NULL;
3380         int     i=0;
3381         int     p=0;
3382
3383 #ifdef FUNCTRACE
3384         printk(KERN_INFO "%s:%s enter  \n",dev->name,__FUNCTION__);
3385 #endif
3386         CLAW_DBF_TEXT(4,trace,"unpkread");
3387         p_first_ccw=NULL;
3388         p_last_ccw=NULL;
3389         p_packh=NULL;
3390         p_packd=NULL;
3391         privptr=dev->priv;
3392         p_env = privptr->p_env;
3393         p_this_ccw=privptr->p_read_active_first;
3394         i=0;
3395         while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
3396 #ifdef IOTRACE
3397                 printk(KERN_INFO "%s p_this_ccw \n",dev->name);
3398                 dumpit((char*)p_this_ccw, sizeof(struct ccwbk));
3399                 printk(KERN_INFO "%s Inbound p_this_ccw->p_buffer(64)"
3400                         " pk=%d \n",dev->name,p_env->packing);
3401                 dumpit((char *)p_this_ccw->p_buffer, 64 );
3402 #endif
3403                 pack_off = 0;
3404                 p = 0;
3405                 p_this_ccw->header.flag=CLAW_PENDING;
3406                 privptr->p_read_active_first=p_this_ccw->next;
3407                 p_this_ccw->next=NULL;
3408                 p_packh = (struct clawph *)p_this_ccw->p_buffer;
3409                 if ((p_env->packing == PACK_SEND) &&
3410                     (p_packh->len == 32)           &&
3411                     (p_packh->link_num == 0)) {   /* is it a packed ctl rec? */
3412                         p_packh++;  /* peek past pack header */
3413                         p_ctlrec = (struct clawctl *)p_packh;
3414                         p_packh--;  /* un peek */
3415                         if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
3416                             (p_ctlrec->command == CONNECTION_CONFIRM))
3417                                 p_env->packing = DO_PACKED;
3418                 }
3419                 if (p_env->packing == DO_PACKED)
3420                         link_num=p_packh->link_num;
3421                 else
3422                         link_num=p_this_ccw->header.opcode / 8;
3423                 if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
3424 #ifdef DEBUGMSG
3425                         printk(KERN_INFO "%s: %s > More_to_come is ON\n",
3426                         dev->name,__FUNCTION__);
3427 #endif
3428                         mtc_this_frm=1;
3429                         if (p_this_ccw->header.length!=
3430                                 privptr->p_env->read_size ) {
3431                                 printk(KERN_INFO " %s: Invalid frame detected "
3432                                         "length is %02x\n" ,
3433                                         dev->name, p_this_ccw->header.length);
3434                         }
3435                 }
3436
3437                 if (privptr->mtc_skipping) {
3438                         /*
3439                         *   We're in the mode of skipping past a
3440                         *   multi-frame message
3441                         *   that we can't process for some reason or other.
3442                         *   The first frame without the More-To-Come flag is
3443                         *   the last frame of the skipped message.
3444                         */
3445                         /*  in case of More-To-Come not set in this frame */
3446                         if (mtc_this_frm==0) {
3447                                 privptr->mtc_skipping=0; /* Ok, the end */
3448                                 privptr->mtc_logical_link=-1;
3449                         }
3450 #ifdef DEBUGMSG
3451                         printk(KERN_INFO "%s:%s goto next "
3452                                 "frame from MoretoComeSkip \n",
3453                                 dev->name,__FUNCTION__);
3454 #endif
3455                         goto NextFrame;
3456                 }
3457
3458                 if (link_num==0) {
3459                         claw_process_control(dev, p_this_ccw);
3460 #ifdef DEBUGMSG
3461                         printk(KERN_INFO "%s:%s goto next "
3462                                 "frame from claw_process_control \n",
3463                                 dev->name,__FUNCTION__);
3464 #endif
3465                         CLAW_DBF_TEXT(4,trace,"UnpkCntl");
3466                         goto NextFrame;
3467                 }
3468 unpack_next:
3469                 if (p_env->packing == DO_PACKED) {
3470                         if (pack_off > p_env->read_size)
3471                                 goto NextFrame;
3472                         p_packd = p_this_ccw->p_buffer+pack_off;
3473                         p_packh = (struct clawph *) p_packd;
3474                         if ((p_packh->len == 0) || /* all done with this frame? */
3475                             (p_packh->flag != 0))
3476                                 goto NextFrame;
3477                         bytes_to_mov = p_packh->len;
3478                         pack_off += bytes_to_mov+sizeof(struct clawph);
3479                         p++;
3480                 } else {
3481                         bytes_to_mov=p_this_ccw->header.length;
3482                 }
3483                 if (privptr->mtc_logical_link<0) {
3484 #ifdef DEBUGMSG
3485                 printk(KERN_INFO "%s: %s mtc_logical_link < 0  \n",
3486                         dev->name,__FUNCTION__);
3487 #endif
3488
3489                 /*
3490                 *  if More-To-Come is set in this frame then we don't know
3491                 *  length of entire message, and hence have to allocate
3492                 *  large buffer   */
3493
3494                 /*      We are starting a new envelope  */
3495                 privptr->mtc_offset=0;
3496                         privptr->mtc_logical_link=link_num;
3497                 }
3498
3499                 if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
3500                         /*      error     */
3501 #ifdef DEBUGMSG
3502                         printk(KERN_INFO "%s: %s > goto next "
3503                                 "frame from MoretoComeSkip \n",
3504                                 dev->name,
3505                                 __FUNCTION__);
3506                         printk(KERN_INFO "      bytes_to_mov %d > (MAX_ENVELOPE_"
3507                                 "SIZE-privptr->mtc_offset %d)\n",
3508                                 bytes_to_mov,(MAX_ENVELOPE_SIZE- privptr->mtc_offset));
3509 #endif
3510                         privptr->stats.rx_frame_errors++;
3511                         goto NextFrame;
3512                 }
3513                 if (p_env->packing == DO_PACKED) {
3514                         memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
3515                                 p_packd+sizeof(struct clawph), bytes_to_mov);
3516
3517                 } else  {
3518                         memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
3519                                 p_this_ccw->p_buffer, bytes_to_mov);
3520                 }
3521 #ifdef DEBUGMSG
3522                 printk(KERN_INFO "%s: %s() received data \n",
3523                         dev->name,__FUNCTION__);
3524                 if (p_env->packing == DO_PACKED)
3525                         dumpit((char *)p_packd+sizeof(struct clawph),32);
3526                 else
3527                         dumpit((char *)p_this_ccw->p_buffer, 32);
3528                 printk(KERN_INFO "%s: %s() bytelength %d \n",
3529                         dev->name,__FUNCTION__,bytes_to_mov);
3530 #endif
3531                 if (mtc_this_frm==0) {
3532                         len_of_data=privptr->mtc_offset+bytes_to_mov;
3533                         skb=dev_alloc_skb(len_of_data);
3534                         if (skb) {
3535                                 memcpy(skb_put(skb,len_of_data),
3536                                         privptr->p_mtc_envelope,
3537                                         len_of_data);
3538                                 skb->mac.raw=skb->data;
3539                                 skb->dev=dev;
3540                                 skb->protocol=htons(ETH_P_IP);
3541                                 skb->ip_summed=CHECKSUM_UNNECESSARY;
3542                                 privptr->stats.rx_packets++;
3543                                 privptr->stats.rx_bytes+=len_of_data;
3544                                 netif_rx(skb);
3545 #ifdef DEBUGMSG
3546                                 printk(KERN_INFO "%s: %s() netif_"
3547                                         "rx(skb) completed \n",
3548                                         dev->name,__FUNCTION__);
3549 #endif
3550                         }
3551                         else {
3552                                 privptr->stats.rx_dropped++;
3553                                 printk(KERN_WARNING "%s: %s() low on memory\n",
3554                                 dev->name,__FUNCTION__);
3555                         }
3556                         privptr->mtc_offset=0;
3557                         privptr->mtc_logical_link=-1;
3558                 }
3559                 else {
3560                         privptr->mtc_offset+=bytes_to_mov;
3561                 }
3562                 if (p_env->packing == DO_PACKED)
3563                         goto unpack_next;
3564 NextFrame:
3565                 /*
3566                 *   Remove ThisCCWblock from active read queue, and add it
3567                 *   to queue of free blocks to be reused.
3568                 */
3569                 i++;
3570                 p_this_ccw->header.length=0xffff;
3571                 p_this_ccw->header.opcode=0xff;
3572                 /*
3573                 *       add this one to the free queue for later reuse
3574                 */
3575                 if (p_first_ccw==NULL) {
3576                         p_first_ccw = p_this_ccw;
3577                 }
3578                 else {
3579                         p_last_ccw->next = p_this_ccw;
3580                 }
3581                 p_last_ccw = p_this_ccw;
3582                 /*
3583                 *       chain to next block on active read queue
3584                 */
3585                 p_this_ccw = privptr->p_read_active_first;
3586                 CLAW_DBF_TEXT_(4,trace,"rxpkt %d",p);
3587         } /* end of while */
3588
3589         /*      check validity                  */
3590
3591 #ifdef IOTRACE
3592         printk(KERN_INFO "%s:%s processed frame is %d \n",
3593                 dev->name,__FUNCTION__,i);
3594         printk(KERN_INFO "%s:%s  F:%lx L:%lx\n",
3595                 dev->name,
3596                 __FUNCTION__,
3597                 (unsigned long)p_first_ccw,
3598                 (unsigned long)p_last_ccw);
3599 #endif
3600         CLAW_DBF_TEXT_(4,trace,"rxfrm %d",i);
3601         add_claw_reads(dev, p_first_ccw, p_last_ccw);
3602         p_ch=&privptr->channel[READ];
3603         claw_strt_read(dev, LOCK_YES);
3604 #ifdef FUNCTRACE
3605         printk(KERN_INFO "%s: %s exit on line %d\n",
3606                 dev->name, __FUNCTION__, __LINE__);
3607 #endif
3608         return;
3609 }     /*  end of unpack_read   */
3610
3611 /*-------------------------------------------------------------------*
3612 *       claw_strt_read                                               *
3613 *                                                                    *
3614 *--------------------------------------------------------------------*/
3615 static void
3616 claw_strt_read (struct net_device *dev, int lock )
3617 {
3618         int        rc = 0;
3619         __u32      parm;
3620         unsigned long  saveflags = 0;
3621         struct claw_privbk *privptr=dev->priv;
3622         struct ccwbk*p_ccwbk;
3623         struct chbk *p_ch;
3624         struct clawh *p_clawh;
3625         p_ch=&privptr->channel[READ];
3626
3627 #ifdef FUNCTRACE
3628         printk(KERN_INFO "%s:%s Enter  \n",dev->name,__FUNCTION__);
3629         printk(KERN_INFO "%s: variable lock = %d, dev =\n",dev->name, lock);
3630         dumpit((char *) dev, sizeof(struct net_device));
3631 #endif
3632         CLAW_DBF_TEXT(4,trace,"StRdNter");
3633         p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
3634         p_clawh->flag=CLAW_IDLE;    /* 0x00 */
3635
3636         if ((privptr->p_write_active_first!=NULL &&
3637              privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
3638             (privptr->p_read_active_first!=NULL &&
3639              privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
3640                 p_clawh->flag=CLAW_BUSY;    /* 0xff */
3641         }
3642 #ifdef DEBUGMSG
3643         printk(KERN_INFO "%s:%s state-%02x\n" ,
3644                 dev->name,__FUNCTION__, p_ch->claw_state);
3645 #endif
3646         if (lock==LOCK_YES) {
3647                 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
3648         }
3649         if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
3650 #ifdef DEBUGMSG
3651                 printk(KERN_INFO "%s: HOT READ started in %s\n" ,
3652                         dev->name,__FUNCTION__);
3653                 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
3654                 dumpit((char *)&p_clawh->flag , 1);
3655 #endif
3656                 CLAW_DBF_TEXT(4,trace,"HotRead");
3657                 p_ccwbk=privptr->p_read_active_first;
3658                 parm = (unsigned long) p_ch;
3659                 rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
3660                                        0xff, 0);
3661                 if (rc != 0) {
3662                         ccw_check_return_code(p_ch->cdev, rc);
3663                 }
3664         }
3665         else {
3666 #ifdef DEBUGMSG
3667                 printk(KERN_INFO "%s: No READ started by %s() In progress\n" ,
3668                         dev->name,__FUNCTION__);
3669 #endif
3670                 CLAW_DBF_TEXT(2,trace,"ReadAct");
3671         }
3672
3673         if (lock==LOCK_YES) {
3674                 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
3675         }
3676 #ifdef FUNCTRACE
3677         printk(KERN_INFO "%s:%s Exit on line %d\n",
3678                 dev->name,__FUNCTION__,__LINE__);
3679 #endif
3680         CLAW_DBF_TEXT(4,trace,"StRdExit");
3681         return;
3682 }       /*    end of claw_strt_read    */
3683
3684 /*-------------------------------------------------------------------*
3685 *       claw_strt_out_IO                                             *
3686 *                                                                    *
3687 *--------------------------------------------------------------------*/
3688
3689 static void
3690 claw_strt_out_IO( struct net_device *dev )
3691 {
3692         int                     rc = 0;
3693         unsigned long           parm;
3694         struct claw_privbk      *privptr;
3695         struct chbk             *p_ch;
3696         struct ccwbk    *p_first_ccw;
3697
3698 #ifdef FUNCTRACE
3699         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3700 #endif
3701         if (!dev) {
3702                 return;
3703         }
3704         privptr=(struct claw_privbk *)dev->priv;
3705         p_ch=&privptr->channel[WRITE];
3706
3707 #ifdef DEBUGMSG
3708         printk(KERN_INFO "%s:%s state-%02x\n" ,
3709                 dev->name,__FUNCTION__,p_ch->claw_state);
3710 #endif
3711         CLAW_DBF_TEXT(4,trace,"strt_io");
3712         p_first_ccw=privptr->p_write_active_first;
3713
3714         if (p_ch->claw_state == CLAW_STOP)
3715                 return;
3716         if (p_first_ccw == NULL) {
3717 #ifdef FUNCTRACE
3718                 printk(KERN_INFO "%s:%s Exit on line %d\n",
3719                         dev->name,__FUNCTION__,__LINE__);
3720 #endif
3721                 return;
3722         }
3723         if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
3724                 parm = (unsigned long) p_ch;
3725 #ifdef DEBUGMSG
3726                 printk(KERN_INFO "%s:%s do_io \n" ,dev->name,__FUNCTION__);
3727                 dumpit((char *)p_first_ccw, sizeof(struct ccwbk));
3728 #endif
3729                 CLAW_DBF_TEXT(2,trace,"StWrtIO");
3730                 rc = ccw_device_start (p_ch->cdev,&p_first_ccw->write, parm,
3731                                        0xff, 0);
3732                 if (rc != 0) {
3733                         ccw_check_return_code(p_ch->cdev, rc);
3734                 }
3735         }
3736         dev->trans_start = jiffies;
3737 #ifdef FUNCTRACE
3738         printk(KERN_INFO "%s:%s Exit on line %d\n",
3739                 dev->name,__FUNCTION__,__LINE__);
3740 #endif
3741
3742         return;
3743 }       /*    end of claw_strt_out_IO    */
3744
3745 /*-------------------------------------------------------------------*
3746 *       Free write buffers                                           *
3747 *                                                                    *
3748 *--------------------------------------------------------------------*/
3749
3750 static void
3751 claw_free_wrt_buf( struct net_device *dev )
3752 {
3753
3754         struct claw_privbk *privptr=(struct claw_privbk *)dev->priv;
3755         struct ccwbk*p_first_ccw;
3756         struct ccwbk*p_last_ccw;
3757         struct ccwbk*p_this_ccw;
3758         struct ccwbk*p_next_ccw;
3759 #ifdef IOTRACE
3760         struct ccwbk*p_buf;
3761 #endif
3762 #ifdef FUNCTRACE
3763         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3764         printk(KERN_INFO "%s: free count = %d  variable dev =\n",
3765                 dev->name,privptr->write_free_count);
3766 #endif
3767         CLAW_DBF_TEXT(4,trace,"freewrtb");
3768         /*  scan the write queue to free any completed write packets   */
3769         p_first_ccw=NULL;
3770         p_last_ccw=NULL;
3771 #ifdef IOTRACE
3772         printk(KERN_INFO "%s:  Dump current CCW chain \n",dev->name  );
3773         p_buf=privptr->p_write_active_first;
3774         while (p_buf!=NULL) {
3775                 dumpit((char *)p_buf, sizeof(struct ccwbk));
3776                 p_buf=p_buf->next;
3777         }
3778         if (p_buf==NULL) {
3779                 printk(KERN_INFO "%s: privptr->p_write_"
3780                         "active_first==NULL\n",dev->name  );
3781         }
3782         p_buf=(struct ccwbk*)privptr->p_end_ccw;
3783         dumpit((char *)p_buf, sizeof(struct endccw));
3784 #endif
3785         p_this_ccw=privptr->p_write_active_first;
3786         while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
3787         {
3788                 p_next_ccw = p_this_ccw->next;
3789                 if (((p_next_ccw!=NULL) &&
3790                      (p_next_ccw->header.flag!=CLAW_PENDING)) ||
3791                     ((p_this_ccw == privptr->p_write_active_last) &&
3792                      (p_this_ccw->header.flag!=CLAW_PENDING))) {
3793                         /* The next CCW is OK or this is  */
3794                         /* the last CCW...free it   @A1A  */
3795                         privptr->p_write_active_first=p_this_ccw->next;
3796                         p_this_ccw->header.flag=CLAW_PENDING;
3797                         p_this_ccw->next=privptr->p_write_free_chain;
3798                         privptr->p_write_free_chain=p_this_ccw;
3799                         ++privptr->write_free_count;
3800                         privptr->stats.tx_bytes+= p_this_ccw->write.count;
3801                         p_this_ccw=privptr->p_write_active_first;
3802                         privptr->stats.tx_packets++;
3803                 }
3804                 else {
3805                         break;
3806                 }
3807         }
3808         if (privptr->write_free_count!=0) {
3809                 claw_clearbit_busy(TB_NOBUFFER,dev);
3810         }
3811         /*   whole chain removed?   */
3812         if (privptr->p_write_active_first==NULL) {
3813                 privptr->p_write_active_last=NULL;
3814 #ifdef DEBUGMSG
3815                 printk(KERN_INFO "%s:%s p_write_"
3816                         "active_first==NULL\n",dev->name,__FUNCTION__);
3817 #endif
3818         }
3819 #ifdef IOTRACE
3820         printk(KERN_INFO "%s: Dump arranged CCW chain \n",dev->name  );
3821         p_buf=privptr->p_write_active_first;
3822         while (p_buf!=NULL) {
3823                 dumpit((char *)p_buf, sizeof(struct ccwbk));
3824                 p_buf=p_buf->next;
3825         }
3826         if (p_buf==NULL) {
3827                 printk(KERN_INFO "%s: privptr->p_write_active_"
3828                         "first==NULL\n",dev->name  );
3829         }
3830         p_buf=(struct ccwbk*)privptr->p_end_ccw;
3831         dumpit((char *)p_buf, sizeof(struct endccw));
3832 #endif
3833
3834         CLAW_DBF_TEXT_(4,trace,"FWC=%d",privptr->write_free_count);
3835 #ifdef FUNCTRACE
3836         printk(KERN_INFO "%s:%s Exit on line %d free_count =%d\n",
3837                 dev->name,__FUNCTION__, __LINE__,privptr->write_free_count);
3838 #endif
3839         return;
3840 }
3841
3842 /*-------------------------------------------------------------------*
3843 *       claw free netdevice                                          *
3844 *                                                                    *
3845 *--------------------------------------------------------------------*/
3846 static void
3847 claw_free_netdevice(struct net_device * dev, int free_dev)
3848 {
3849         struct claw_privbk *privptr;
3850 #ifdef FUNCTRACE
3851         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3852 #endif
3853         CLAW_DBF_TEXT(2,setup,"free_dev");
3854
3855         if (!dev)
3856                 return;
3857         CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
3858         privptr = dev->priv;
3859         if (dev->flags & IFF_RUNNING)
3860                 claw_release(dev);
3861         if (privptr) {
3862                 privptr->channel[READ].ndev = NULL;  /* say it's free */
3863         }
3864         dev->priv=NULL;
3865 #ifdef MODULE
3866         if (free_dev) {
3867                 free_netdev(dev);
3868         }
3869 #endif
3870         CLAW_DBF_TEXT(2,setup,"feee_ok");
3871 #ifdef FUNCTRACE
3872         printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
3873 #endif
3874 }
3875
3876 /**
3877  * Claw init netdevice
3878  * Initialize everything of the net device except the name and the
3879  * channel structs.
3880  */
3881 static void
3882 claw_init_netdevice(struct net_device * dev)
3883 {
3884 #ifdef FUNCTRACE
3885         printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3886 #endif
3887         CLAW_DBF_TEXT(2,setup,"init_dev");
3888         CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
3889         if (!dev) {
3890         printk(KERN_WARNING "claw:%s BAD Device exit line %d\n",
3891                 __FUNCTION__,__LINE__);
3892                 CLAW_DBF_TEXT(2,setup,"baddev");
3893                 return;
3894         }
3895         dev->mtu = CLAW_DEFAULT_MTU_SIZE;
3896         dev->hard_start_xmit = claw_tx;
3897         dev->open = claw_open;
3898         dev->stop = claw_release;
3899         dev->get_stats = claw_stats;
3900         dev->change_mtu = claw_change_mtu;
3901         dev->hard_header_len = 0;
3902         dev->addr_len = 0;
3903         dev->type = ARPHRD_SLIP;
3904         dev->tx_queue_len = 1300;
3905         dev->flags = IFF_POINTOPOINT | IFF_NOARP;
3906         SET_MODULE_OWNER(dev);
3907 #ifdef FUNCTRACE
3908         printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
3909 #endif
3910         CLAW_DBF_TEXT(2,setup,"initok");
3911         return;
3912 }
3913
3914 /**
3915  * Init a new channel in the privptr->channel[i].
3916  *
3917  * @param cdev  The ccw_device to be added.
3918  *
3919  * @return 0 on success, !0 on error.
3920  */
3921 static int
3922 add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
3923 {
3924         struct chbk *p_ch;
3925
3926 #ifdef FUNCTRACE
3927         printk(KERN_INFO "%s:%s Enter\n",cdev->dev.bus_id,__FUNCTION__);
3928 #endif
3929         CLAW_DBF_TEXT_(2,setup,"%s",cdev->dev.bus_id);
3930         privptr->channel[i].flag  = i+1;   /* Read is 1 Write is 2 */
3931         p_ch = &privptr->channel[i];
3932         p_ch->cdev = cdev;
3933         snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", cdev->dev.bus_id);
3934         sscanf(cdev->dev.bus_id+4,"%x",&p_ch->devno);
3935         if ((p_ch->irb = kmalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
3936                 printk(KERN_WARNING "%s Out of memory in %s for irb\n",
3937                         p_ch->id,__FUNCTION__);
3938 #ifdef FUNCTRACE
3939                 printk(KERN_INFO "%s:%s Exit on line %d\n",
3940                         p_ch->id,__FUNCTION__,__LINE__);
3941 #endif
3942                 return -ENOMEM;
3943         }
3944         memset(p_ch->irb, 0, sizeof (struct irb));
3945 #ifdef FUNCTRACE
3946                 printk(KERN_INFO "%s:%s Exit on line %d\n",
3947                         cdev->dev.bus_id,__FUNCTION__,__LINE__);
3948 #endif
3949         return 0;
3950 }
3951
3952
3953 /**
3954  *
3955  * Setup an interface.
3956  *
3957  * @param cgdev  Device to be setup.
3958  *
3959  * @returns 0 on success, !0 on failure.
3960  */
3961 static int
3962 claw_new_device(struct ccwgroup_device *cgdev)
3963 {
3964         struct claw_privbk *privptr;
3965         struct claw_env *p_env;
3966         struct net_device *dev;
3967         int ret;
3968
3969         pr_debug("%s() called\n", __FUNCTION__);
3970         printk(KERN_INFO "claw: add for %s\n",cgdev->cdev[READ]->dev.bus_id);
3971         CLAW_DBF_TEXT(2,setup,"new_dev");
3972         privptr = cgdev->dev.driver_data;
3973         cgdev->cdev[READ]->dev.driver_data = privptr;
3974         cgdev->cdev[WRITE]->dev.driver_data = privptr;
3975         if (!privptr)
3976                 return -ENODEV;
3977         p_env = privptr->p_env;
3978         sscanf(cgdev->cdev[READ]->dev.bus_id+4,"%x",
3979                 &p_env->devno[READ]);
3980         sscanf(cgdev->cdev[WRITE]->dev.bus_id+4,"%x",
3981                 &p_env->devno[WRITE]);
3982         ret = add_channel(cgdev->cdev[0],0,privptr);
3983         if (ret == 0)
3984                 ret = add_channel(cgdev->cdev[1],1,privptr);
3985         if (ret != 0) {
3986                         printk(KERN_WARNING
3987                         "add channel failed "
3988                                 "with ret = %d\n", ret);
3989                         goto out;
3990         }
3991         ret = ccw_device_set_online(cgdev->cdev[READ]);
3992         if (ret != 0) {
3993                 printk(KERN_WARNING
3994                  "claw: ccw_device_set_online %s READ failed "
3995                         "with ret = %d\n",cgdev->cdev[READ]->dev.bus_id,ret);
3996                 goto out;
3997         }
3998         ret = ccw_device_set_online(cgdev->cdev[WRITE]);
3999         if (ret != 0) {
4000                 printk(KERN_WARNING
4001                  "claw: ccw_device_set_online %s WRITE failed "
4002                         "with ret = %d\n",cgdev->cdev[WRITE]->dev.bus_id, ret);
4003                 goto out;
4004         }
4005         dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
4006         if (!dev) {
4007                 printk(KERN_WARNING "%s:alloc_netdev failed\n",__FUNCTION__);
4008                 goto out;
4009         }
4010         dev->priv = privptr;
4011         cgdev->dev.driver_data = privptr;
4012         cgdev->cdev[READ]->dev.driver_data = privptr;
4013         cgdev->cdev[WRITE]->dev.driver_data = privptr;
4014         /* sysfs magic */
4015         SET_NETDEV_DEV(dev, &cgdev->dev);
4016         if (register_netdev(dev) != 0) {
4017                 claw_free_netdevice(dev, 1);
4018                 CLAW_DBF_TEXT(2,trace,"regfail");
4019                 goto out;
4020         }
4021         dev->flags &=~IFF_RUNNING;
4022         if (privptr->buffs_alloc == 0) {
4023                 ret=init_ccw_bk(dev);
4024                 if (ret !=0) {
4025                         printk(KERN_WARNING
4026                          "claw: init_ccw_bk failed with ret=%d\n", ret);
4027                         unregister_netdev(dev);
4028                         claw_free_netdevice(dev,1);
4029                         CLAW_DBF_TEXT(2,trace,"ccwmem");
4030                         goto out;
4031                 }
4032         }
4033         privptr->channel[READ].ndev = dev;
4034         privptr->channel[WRITE].ndev = dev;
4035         privptr->p_env->ndev = dev;
4036
4037         printk(KERN_INFO "%s:readsize=%d  writesize=%d "
4038                 "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
4039                 dev->name, p_env->read_size,
4040                 p_env->write_size, p_env->read_buffers,
4041                 p_env->write_buffers, p_env->devno[READ],
4042                 p_env->devno[WRITE]);
4043         printk(KERN_INFO "%s:host_name:%.8s, adapter_name "
4044                 ":%.8s api_type: %.8s\n",
4045                 dev->name, p_env->host_name,
4046                 p_env->adapter_name , p_env->api_type);
4047         return 0;
4048 out:
4049         ccw_device_set_offline(cgdev->cdev[1]);
4050         ccw_device_set_offline(cgdev->cdev[0]);
4051
4052         return -ENODEV;
4053 }
4054
4055 static void
4056 claw_purge_skb_queue(struct sk_buff_head *q)
4057 {
4058         struct sk_buff *skb;
4059
4060         CLAW_DBF_TEXT(4,trace,"purgque");
4061
4062         while ((skb = skb_dequeue(q))) {
4063                 atomic_dec(&skb->users);
4064                 dev_kfree_skb_any(skb);
4065         }
4066 }
4067
4068 /**
4069  * Shutdown an interface.
4070  *
4071  * @param cgdev  Device to be shut down.
4072  *
4073  * @returns 0 on success, !0 on failure.
4074  */
4075 static int
4076 claw_shutdown_device(struct ccwgroup_device *cgdev)
4077 {
4078         struct claw_privbk *priv;
4079         struct net_device *ndev;
4080         int     ret;
4081
4082         pr_debug("%s() called\n", __FUNCTION__);
4083         CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
4084         priv = cgdev->dev.driver_data;
4085         if (!priv)
4086                 return -ENODEV;
4087         ndev = priv->channel[READ].ndev;
4088         if (ndev) {
4089                 /* Close the device */
4090                 printk(KERN_INFO
4091                         "%s: shuting down \n",ndev->name);
4092                 if (ndev->flags & IFF_RUNNING)
4093                         ret = claw_release(ndev);
4094                 ndev->flags &=~IFF_RUNNING;
4095                 unregister_netdev(ndev);
4096                 ndev->priv = NULL;  /* cgdev data, not ndev's to free */
4097                 claw_free_netdevice(ndev, 1);
4098                 priv->channel[READ].ndev = NULL;
4099                 priv->channel[WRITE].ndev = NULL;
4100                 priv->p_env->ndev = NULL;
4101         }
4102         ccw_device_set_offline(cgdev->cdev[1]);
4103         ccw_device_set_offline(cgdev->cdev[0]);
4104         return 0;
4105 }
4106
4107 static void
4108 claw_remove_device(struct ccwgroup_device *cgdev)
4109 {
4110         struct claw_privbk *priv;
4111
4112         pr_debug("%s() called\n", __FUNCTION__);
4113         CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
4114         priv = cgdev->dev.driver_data;
4115         if (!priv) {
4116                 printk(KERN_WARNING "claw: %s() no Priv exiting\n",__FUNCTION__);
4117                 return;
4118         }
4119         printk(KERN_INFO "claw: %s() called %s will be removed.\n",
4120                         __FUNCTION__,cgdev->cdev[0]->dev.bus_id);
4121         if (cgdev->state == CCWGROUP_ONLINE)
4122                 claw_shutdown_device(cgdev);
4123         claw_remove_files(&cgdev->dev);
4124         if (priv->p_mtc_envelope!=NULL) {
4125                 kfree(priv->p_mtc_envelope);
4126                 priv->p_mtc_envelope=NULL;
4127         }
4128         if (priv->p_env != NULL) {
4129                 kfree(priv->p_env);
4130                 priv->p_env=NULL;
4131         }
4132         if (priv->channel[0].irb != NULL) {
4133                 kfree(priv->channel[0].irb);
4134                 priv->channel[0].irb=NULL;
4135         }
4136         if (priv->channel[1].irb != NULL) {
4137                 kfree(priv->channel[1].irb);
4138                 priv->channel[1].irb=NULL;
4139         }
4140         kfree(priv);
4141         cgdev->dev.driver_data=NULL;
4142         cgdev->cdev[READ]->dev.driver_data = NULL;
4143         cgdev->cdev[WRITE]->dev.driver_data = NULL;
4144         put_device(&cgdev->dev);
4145 }
4146
4147
4148 /*
4149  * sysfs attributes
4150  */
4151 static ssize_t
4152 claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
4153 {
4154         struct claw_privbk *priv;
4155         struct claw_env *  p_env;
4156
4157         priv = dev->driver_data;
4158         if (!priv)
4159                 return -ENODEV;
4160         p_env = priv->p_env;
4161         return sprintf(buf, "%s\n",p_env->host_name);
4162 }
4163
4164 static ssize_t
4165 claw_hname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4166 {
4167         struct claw_privbk *priv;
4168         struct claw_env *  p_env;
4169
4170         priv = dev->driver_data;
4171         if (!priv)
4172                 return -ENODEV;
4173         p_env = priv->p_env;
4174         if (count > MAX_NAME_LEN+1)
4175                 return -EINVAL;
4176         memset(p_env->host_name, 0x20, MAX_NAME_LEN);
4177         strncpy(p_env->host_name,buf, count);
4178         p_env->host_name[count-1] = 0x20;  /* clear extra 0x0a */
4179         p_env->host_name[MAX_NAME_LEN] = 0x00;
4180         CLAW_DBF_TEXT(2,setup,"HstnSet");
4181         CLAW_DBF_TEXT_(2,setup,"%s",p_env->host_name);
4182
4183         return count;
4184 }
4185
4186 static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
4187
4188 static ssize_t
4189 claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
4190 {
4191         struct claw_privbk *priv;
4192         struct claw_env *  p_env;
4193
4194         priv = dev->driver_data;
4195         if (!priv)
4196                 return -ENODEV;
4197         p_env = priv->p_env;
4198         return sprintf(buf, "%s\n",p_env->adapter_name);
4199 }
4200
4201 static ssize_t
4202 claw_adname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4203 {
4204         struct claw_privbk *priv;
4205         struct claw_env *  p_env;
4206
4207         priv = dev->driver_data;
4208         if (!priv)
4209                 return -ENODEV;
4210         p_env = priv->p_env;
4211         if (count > MAX_NAME_LEN+1)
4212                 return -EINVAL;
4213         memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
4214         strncpy(p_env->adapter_name,buf, count);
4215         p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
4216         p_env->adapter_name[MAX_NAME_LEN] = 0x00;
4217         CLAW_DBF_TEXT(2,setup,"AdnSet");
4218         CLAW_DBF_TEXT_(2,setup,"%s",p_env->adapter_name);
4219
4220         return count;
4221 }
4222
4223 static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
4224
4225 static ssize_t
4226 claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
4227 {
4228         struct claw_privbk *priv;
4229         struct claw_env *  p_env;
4230
4231         priv = dev->driver_data;
4232         if (!priv)
4233                 return -ENODEV;
4234         p_env = priv->p_env;
4235         return sprintf(buf, "%s\n",
4236                        p_env->api_type);
4237 }
4238
4239 static ssize_t
4240 claw_apname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4241 {
4242         struct claw_privbk *priv;
4243         struct claw_env *  p_env;
4244
4245         priv = dev->driver_data;
4246         if (!priv)
4247                 return -ENODEV;
4248         p_env = priv->p_env;
4249         if (count > MAX_NAME_LEN+1)
4250                 return -EINVAL;
4251         memset(p_env->api_type, 0x20, MAX_NAME_LEN);
4252         strncpy(p_env->api_type,buf, count);
4253         p_env->api_type[count-1] = 0x20;  /* we get a loose 0x0a */
4254         p_env->api_type[MAX_NAME_LEN] = 0x00;
4255         if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
4256                 p_env->read_size=DEF_PACK_BUFSIZE;
4257                 p_env->write_size=DEF_PACK_BUFSIZE;
4258                 p_env->packing=PACKING_ASK;
4259                 CLAW_DBF_TEXT(2,setup,"PACKING");
4260         }
4261         else {
4262                 p_env->packing=0;
4263                 p_env->read_size=CLAW_FRAME_SIZE;
4264                 p_env->write_size=CLAW_FRAME_SIZE;
4265                 CLAW_DBF_TEXT(2,setup,"ApiSet");
4266         }
4267         CLAW_DBF_TEXT_(2,setup,"%s",p_env->api_type);
4268         return count;
4269 }
4270
4271 static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
4272
4273 static ssize_t
4274 claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
4275 {
4276         struct claw_privbk *priv;
4277         struct claw_env * p_env;
4278
4279         priv = dev->driver_data;
4280         if (!priv)
4281                 return -ENODEV;
4282         p_env = priv->p_env;
4283         return sprintf(buf, "%d\n", p_env->write_buffers);
4284 }
4285
4286 static ssize_t
4287 claw_wbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4288 {
4289         struct claw_privbk *priv;
4290         struct claw_env *  p_env;
4291         int nnn,max;
4292
4293         priv = dev->driver_data;
4294         if (!priv)
4295                 return -ENODEV;
4296         p_env = priv->p_env;
4297         sscanf(buf, "%i", &nnn);
4298         if (p_env->packing) {
4299                 max = 64;
4300         }
4301         else {
4302                 max = 512;
4303         }
4304         if ((nnn > max ) || (nnn < 2))
4305                 return -EINVAL;
4306         p_env->write_buffers = nnn;
4307         CLAW_DBF_TEXT(2,setup,"Wbufset");
4308         CLAW_DBF_TEXT_(2,setup,"WB=%d",p_env->write_buffers);
4309         return count;
4310 }
4311
4312 static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
4313
4314 static ssize_t
4315 claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
4316 {
4317         struct claw_privbk *priv;
4318         struct claw_env *  p_env;
4319
4320         priv = dev->driver_data;
4321         if (!priv)
4322                 return -ENODEV;
4323         p_env = priv->p_env;
4324         return sprintf(buf, "%d\n", p_env->read_buffers);
4325 }
4326
4327 static ssize_t
4328 claw_rbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4329 {
4330         struct claw_privbk *priv;
4331         struct claw_env *p_env;
4332         int nnn,max;
4333
4334         priv = dev->driver_data;
4335         if (!priv)
4336                 return -ENODEV;
4337         p_env = priv->p_env;
4338         sscanf(buf, "%i", &nnn);
4339         if (p_env->packing) {
4340                 max = 64;
4341         }
4342         else {
4343                 max = 512;
4344         }
4345         if ((nnn > max ) || (nnn < 2))
4346                 return -EINVAL;
4347         p_env->read_buffers = nnn;
4348         CLAW_DBF_TEXT(2,setup,"Rbufset");
4349         CLAW_DBF_TEXT_(2,setup,"RB=%d",p_env->read_buffers);
4350         return count;
4351 }
4352
4353 static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
4354
4355 static struct attribute *claw_attr[] = {
4356         &dev_attr_read_buffer.attr,
4357         &dev_attr_write_buffer.attr,
4358         &dev_attr_adapter_name.attr,
4359         &dev_attr_api_type.attr,
4360         &dev_attr_host_name.attr,
4361         NULL,
4362 };
4363
4364 static struct attribute_group claw_attr_group = {
4365         .attrs = claw_attr,
4366 };
4367
4368 static int
4369 claw_add_files(struct device *dev)
4370 {
4371         pr_debug("%s() called\n", __FUNCTION__);
4372         CLAW_DBF_TEXT(2,setup,"add_file");
4373         return sysfs_create_group(&dev->kobj, &claw_attr_group);
4374 }
4375
4376 static void
4377 claw_remove_files(struct device *dev)
4378 {
4379         pr_debug("%s() called\n", __FUNCTION__);
4380         CLAW_DBF_TEXT(2,setup,"rem_file");
4381         sysfs_remove_group(&dev->kobj, &claw_attr_group);
4382 }
4383
4384 /*--------------------------------------------------------------------*
4385 *    claw_init  and cleanup                                           *
4386 *---------------------------------------------------------------------*/
4387
4388 static void __exit
4389 claw_cleanup(void)
4390 {
4391         unregister_cu3088_discipline(&claw_group_driver);
4392         claw_unregister_debug_facility();
4393         printk(KERN_INFO "claw: Driver unloaded\n");
4394
4395 }
4396
4397 /**
4398  * Initialize module.
4399  * This is called just after the module is loaded.
4400  *
4401  * @return 0 on success, !0 on error.
4402  */
4403 static int __init
4404 claw_init(void)
4405 {
4406         int ret = 0;
4407        printk(KERN_INFO "claw: starting driver "
4408 #ifdef MODULE
4409                 "module "
4410 #else
4411                 "compiled into kernel "
4412 #endif
4413                 " $Revision: 1.38 $ $Date: 2005/08/29 09:47:04 $ \n");
4414
4415
4416 #ifdef FUNCTRACE
4417         printk(KERN_INFO "claw: %s() enter \n",__FUNCTION__);
4418 #endif
4419         ret = claw_register_debug_facility();
4420         if (ret) {
4421                 printk(KERN_WARNING "claw: %s() debug_register failed %d\n",
4422                         __FUNCTION__,ret);
4423                 return ret;
4424         }
4425         CLAW_DBF_TEXT(2,setup,"init_mod");
4426         ret = register_cu3088_discipline(&claw_group_driver);
4427         if (ret) {
4428                 claw_unregister_debug_facility();
4429                 printk(KERN_WARNING "claw; %s() cu3088 register failed %d\n",
4430                         __FUNCTION__,ret);
4431         }
4432 #ifdef FUNCTRACE
4433         printk(KERN_INFO "claw: %s() exit \n",__FUNCTION__);
4434 #endif
4435         return ret;
4436 }
4437
4438 module_init(claw_init);
4439 module_exit(claw_cleanup);
4440
4441
4442
4443 /*--------------------------------------------------------------------*
4444 *    End of File                                                      *
4445 *---------------------------------------------------------------------*/
4446
4447