drivers/s390/net/claw.c

   1 /*
   2  *  drivers/s390/net/claw.c
   3  *    ESCON CLAW network driver
   4  *
   5  *  Linux for zSeries version
   6  *    Copyright IBM Corp. 2002, 2009
   7  *  Author(s) Original code written by:
   8  *              Kazuo Iimura <iimura@jp.ibm.com>
   9  *            Rewritten by
  10  *              Andy Richter <richtera@us.ibm.com>
  11  *              Marc Price <mwprice@us.ibm.com>
  12  *
  13  *    sysfs parms:
  14  *   group x.x.rrrr,x.x.wwww
  15  *   read_buffer nnnnnnn
  16  *   write_buffer nnnnnn
  17  *   host_name  aaaaaaaa
  18  *   adapter_name aaaaaaaa
  19  *   api_type    aaaaaaaa
  20  *
  21  *  eg.
  22  *   group  0.0.0200 0.0.0201
  23  *   read_buffer 25
  24  *   write_buffer 20
  25  *   host_name LINUX390
  26  *   adapter_name RS6K
  27  *   api_type     TCPIP
  28  *
  29  *  where
  30  *
  31  *   The device id is decided by the order entries
  32  *   are added to the group the first is claw0 the second claw1
  33  *   up to CLAW_MAX_DEV
  34  *
  35  *   rrrr     - the first of 2 consecutive device addresses used for the
  36  *              CLAW protocol.
  37  *              The specified address is always used as the input (Read)
  38  *              channel and the next address is used as the output channel.
  39  *
  40  *   wwww     - the second of 2 consecutive device addresses used for
  41  *              the CLAW protocol.
  42  *              The specified address is always used as the output
  43  *              channel and the previous address is used as the input channel.
  44  *
  45  *   read_buffer        -       specifies number of input buffers to allocate.
  46  *   write_buffer       -       specifies number of output buffers to allocate.
  47  *   host_name          -       host name
  48  *   adaptor_name       -       adaptor name
  49  *   api_type           -       API type TCPIP or API will be sent and expected
  50  *                              as ws_name
  51  *
  52  *   Note the following requirements:
  53  *   1)  host_name must match the configured adapter_name on the remote side
  54  *   2)  adaptor_name must match the configured host name on the remote side
  55  *
  56  *  Change History
  57  *    1.00  Initial release shipped
  58  *    1.10  Changes for Buffer allocation
  59  *    1.15  Changed for 2.6 Kernel  No longer compiles on 2.4 or lower
  60  *    1.25  Added Packing support
  61  *    1.5
  62  */
  63
  64 #define KMSG_COMPONENT "claw"
  65
  66 #include <linux/kernel_stat.h>
  67 #include <asm/ccwdev.h>
  68 #include <asm/ccwgroup.h>
  69 #include <asm/debug.h>
  70 #include <asm/idals.h>
  71 #include <asm/io.h>
  72 #include <linux/bitops.h>
  73 #include <linux/ctype.h>
  74 #include <linux/delay.h>
  75 #include <linux/errno.h>
  76 #include <linux/if_arp.h>
  77 #include <linux/init.h>
  78 #include <linux/interrupt.h>
  79 #include <linux/ip.h>
  80 #include <linux/kernel.h>
  81 #include <linux/module.h>
  82 #include <linux/netdevice.h>
  83 #include <linux/etherdevice.h>
  84 #include <linux/proc_fs.h>
  85 #include <linux/sched.h>
  86 #include <linux/signal.h>
  87 #include <linux/skbuff.h>
  88 #include <linux/slab.h>
  89 #include <linux/string.h>
  90 #include <linux/tcp.h>
  91 #include <linux/timer.h>
  92 #include <linux/types.h>
  93
  94 #include "claw.h"
  95
  96 /*
  97    CLAW uses the s390dbf file system  see claw_trace and claw_setup
  98 */
  99
 100 static char version[] __initdata = "CLAW driver";
 101 static char debug_buffer[255];
 102 /**
 103  * Debug Facility Stuff
 104  */
 105 static debug_info_t *claw_dbf_setup;
 106 static debug_info_t *claw_dbf_trace;
 107
 108 /**
 109  *  CLAW Debug Facility functions
 110  */
 111 static void
 112 claw_unregister_debug_facility(void)
 113 {
 114         if (claw_dbf_setup)
 115                 debug_unregister(claw_dbf_setup);
 116         if (claw_dbf_trace)
 117                 debug_unregister(claw_dbf_trace);
 118 }
 119
 120 static int
 121 claw_register_debug_facility(void)
 122 {
 123         claw_dbf_setup = debug_register("claw_setup", 2, 1, 8);
 124         claw_dbf_trace = debug_register("claw_trace", 2, 2, 8);
 125         if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
 126                 claw_unregister_debug_facility();
 127                 return -ENOMEM;
 128         }
 129         debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
 130         debug_set_level(claw_dbf_setup, 2);
 131         debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
 132         debug_set_level(claw_dbf_trace, 2);
 133         return 0;
 134 }
 135
 136 static inline void
 137 claw_set_busy(struct net_device *dev)
 138 {
 139  ((struct claw_privbk *)dev->ml_priv)->tbusy = 1;
 140  eieio();
 141 }
 142
 143 static inline void
 144 claw_clear_busy(struct net_device *dev)
 145 {
 146         clear_bit(0, &(((struct claw_privbk *) dev->ml_priv)->tbusy));
 147         netif_wake_queue(dev);
 148         eieio();
 149 }
 150
 151 static inline int
 152 claw_check_busy(struct net_device *dev)
 153 {
 154         eieio();
 155         return ((struct claw_privbk *) dev->ml_priv)->tbusy;
 156 }
 157
 158 static inline void
 159 claw_setbit_busy(int nr,struct net_device *dev)
 160 {
 161         netif_stop_queue(dev);
 162         set_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy));
 163 }
 164
 165 static inline void
 166 claw_clearbit_busy(int nr,struct net_device *dev)
 167 {
 168         clear_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy));
 169         netif_wake_queue(dev);
 170 }
 171
 172 static inline int
 173 claw_test_and_setbit_busy(int nr,struct net_device *dev)
 174 {
 175         netif_stop_queue(dev);
 176         return test_and_set_bit(nr,
 177                 (void *)&(((struct claw_privbk *) dev->ml_priv)->tbusy));
 178 }
 179
 180
 181 /* Functions for the DEV methods */
 182
 183 static int claw_probe(struct ccwgroup_device *cgdev);
 184 static void claw_remove_device(struct ccwgroup_device *cgdev);
 185 static void claw_purge_skb_queue(struct sk_buff_head *q);
 186 static int claw_new_device(struct ccwgroup_device *cgdev);
 187 static int claw_shutdown_device(struct ccwgroup_device *cgdev);
 188 static int claw_tx(struct sk_buff *skb, struct net_device *dev);
 189 static int claw_change_mtu( struct net_device *dev, int new_mtu);
 190 static int claw_open(struct net_device *dev);
 191 static void claw_irq_handler(struct ccw_device *cdev,
 192         unsigned long intparm, struct irb *irb);
 193 static void claw_irq_tasklet ( unsigned long data );
 194 static int claw_release(struct net_device *dev);
 195 static void claw_write_retry ( struct chbk * p_ch );
 196 static void claw_write_next ( struct chbk * p_ch );
 197 static void claw_timer ( struct chbk * p_ch );
 198
 199 /* Functions */
 200 static int add_claw_reads(struct net_device *dev,
 201         struct ccwbk* p_first, struct ccwbk* p_last);
 202 static void ccw_check_return_code (struct ccw_device *cdev, int return_code);
 203 static void ccw_check_unit_check (struct chbk * p_ch, unsigned char sense );
 204 static int find_link(struct net_device *dev, char *host_name, char *ws_name );
 205 static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
 206 static int init_ccw_bk(struct net_device *dev);
 207 static void probe_error( struct ccwgroup_device *cgdev);
 208 static struct net_device_stats *claw_stats(struct net_device *dev);
 209 static int pages_to_order_of_mag(int num_of_pages);
 210 static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
 211 /* sysfs Functions */
 212 static ssize_t claw_hname_show(struct device *dev,
 213         struct device_attribute *attr, char *buf);
 214 static ssize_t claw_hname_write(struct device *dev,
 215         struct device_attribute *attr,
 216         const char *buf, size_t count);
 217 static ssize_t claw_adname_show(struct device *dev,
 218         struct device_attribute *attr, char *buf);
 219 static ssize_t claw_adname_write(struct device *dev,
 220         struct device_attribute *attr,
 221         const char *buf, size_t count);
 222 static ssize_t claw_apname_show(struct device *dev,
 223         struct device_attribute *attr, char *buf);
 224 static ssize_t claw_apname_write(struct device *dev,
 225         struct device_attribute *attr,
 226         const char *buf, size_t count);
 227 static ssize_t claw_wbuff_show(struct device *dev,
 228         struct device_attribute *attr, char *buf);
 229 static ssize_t claw_wbuff_write(struct device *dev,
 230         struct device_attribute *attr,
 231         const char *buf, size_t count);
 232 static ssize_t claw_rbuff_show(struct device *dev,
 233         struct device_attribute *attr, char *buf);
 234 static ssize_t claw_rbuff_write(struct device *dev,
 235         struct device_attribute *attr,
 236         const char *buf, size_t count);
 237 static int claw_add_files(struct device *dev);
 238 static void claw_remove_files(struct device *dev);
 239
 240 /*   Functions for System Validate  */
 241 static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
 242 static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
 243        __u8 correlator, __u8 rc , char *local_name, char *remote_name);
 244 static int claw_snd_conn_req(struct net_device *dev, __u8 link);
 245 static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
 246 static int claw_snd_sys_validate_rsp(struct net_device *dev,
 247         struct clawctl * p_ctl, __u32 return_code);
 248 static int claw_strt_conn_req(struct net_device *dev );
 249 static void claw_strt_read(struct net_device *dev, int lock);
 250 static void claw_strt_out_IO(struct net_device *dev);
 251 static void claw_free_wrt_buf(struct net_device *dev);
 252
 253 /* Functions for unpack reads   */
 254 static void unpack_read(struct net_device *dev);
 255
 256 static int claw_pm_prepare(struct ccwgroup_device *gdev)
 257 {
 258         return -EPERM;
 259 }
 260
 261 /* the root device for claw group devices */
 262 static struct device *claw_root_dev;
 263
 264 /* ccwgroup table  */
 265
 266 static struct ccwgroup_driver claw_group_driver = {
 267         .driver = {
 268                 .owner  = THIS_MODULE,
 269                 .name   = "claw",
 270         },
 271         .max_slaves  = 2,
 272         .driver_id   = 0xC3D3C1E6,
 273         .probe       = claw_probe,
 274         .remove      = claw_remove_device,
 275         .set_online  = claw_new_device,
 276         .set_offline = claw_shutdown_device,
 277         .prepare     = claw_pm_prepare,
 278 };
 279
 280 static struct ccw_device_id claw_ids[] = {
 281         {CCW_DEVICE(0x3088, 0x61), .driver_info = claw_channel_type_claw},
 282         {},
 283 };
 284 MODULE_DEVICE_TABLE(ccw, claw_ids);
 285
 286 static struct ccw_driver claw_ccw_driver = {
 287         .driver = {
 288                 .owner  = THIS_MODULE,
 289                 .name   = "claw",
 290         },
 291         .ids    = claw_ids,
 292         .probe  = ccwgroup_probe_ccwdev,
 293         .remove = ccwgroup_remove_ccwdev,
 294 };
 295
 296 static ssize_t
 297 claw_driver_group_store(struct device_driver *ddrv, const char *buf,
 298                         size_t count)
 299 {
 300         int err;
 301         err = ccwgroup_create_from_string(claw_root_dev,
 302                                           claw_group_driver.driver_id,
 303                                           &claw_ccw_driver, 2, buf);
 304         return err ? err : count;
 305 }
 306
 307 static DRIVER_ATTR(group, 0200, NULL, claw_driver_group_store);
 308
 309 static struct attribute *claw_group_attrs[] = {
 310         &driver_attr_group.attr,
 311         NULL,
 312 };
 313
 314 static struct attribute_group claw_group_attr_group = {
 315         .attrs = claw_group_attrs,
 316 };
 317
 318 static const struct attribute_group *claw_group_attr_groups[] = {
 319         &claw_group_attr_group,
 320         NULL,
 321 };
 322
 323 /*
 324 *       Key functions
 325 */
 326
 327 /*----------------------------------------------------------------*
 328  *   claw_probe                                                   *
 329  *      this function is called for each CLAW device.             *
 330  *----------------------------------------------------------------*/
 331 static int
 332 claw_probe(struct ccwgroup_device *cgdev)
 333 {
 334         int             rc;
 335         struct claw_privbk *privptr=NULL;
 336
 337         CLAW_DBF_TEXT(2, setup, "probe");
 338         if (!get_device(&cgdev->dev))
 339                 return -ENODEV;
 340         privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL);
 341         dev_set_drvdata(&cgdev->dev, privptr);
 342         if (privptr == NULL) {
 343                 probe_error(cgdev);
 344                 put_device(&cgdev->dev);
 345                 CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
 346                 return -ENOMEM;
 347         }
 348         privptr->p_mtc_envelope= kzalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
 349         privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL);
 350         if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
 351                 probe_error(cgdev);
 352                 put_device(&cgdev->dev);
 353                 CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
 354                 return -ENOMEM;
 355         }
 356         memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
 357         memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
 358         memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
 359         privptr->p_env->packing = 0;
 360         privptr->p_env->write_buffers = 5;
 361         privptr->p_env->read_buffers = 5;
 362         privptr->p_env->read_size = CLAW_FRAME_SIZE;
 363         privptr->p_env->write_size = CLAW_FRAME_SIZE;
 364         rc = claw_add_files(&cgdev->dev);
 365         if (rc) {
 366                 probe_error(cgdev);
 367                 put_device(&cgdev->dev);
 368                 dev_err(&cgdev->dev, "Creating the /proc files for a new"
 369                 " CLAW device failed\n");
 370                 CLAW_DBF_TEXT_(2, setup, "probex%d", rc);
 371                 return rc;
 372         }
 373         privptr->p_env->p_priv = privptr;
 374         cgdev->cdev[0]->handler = claw_irq_handler;
 375         cgdev->cdev[1]->handler = claw_irq_handler;
 376         CLAW_DBF_TEXT(2, setup, "prbext 0");
 377
 378         return 0;
 379 }  /*  end of claw_probe       */
 380
 381 /*-------------------------------------------------------------------*
 382  *   claw_tx                                                         *
 383  *-------------------------------------------------------------------*/
 384
 385 static int
 386 claw_tx(struct sk_buff *skb, struct net_device *dev)
 387 {
 388         int             rc;
 389         struct claw_privbk *privptr = dev->ml_priv;
 390         unsigned long saveflags;
 391         struct chbk *p_ch;
 392
 393         CLAW_DBF_TEXT(4, trace, "claw_tx");
 394         p_ch = &privptr->channel[WRITE_CHANNEL];
 395         spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
 396         rc=claw_hw_tx( skb, dev, 1 );
 397         spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
 398         CLAW_DBF_TEXT_(4, trace, "clawtx%d", rc);
 399         if (rc)
 400                 rc = NETDEV_TX_BUSY;
 401         else
 402                 rc = NETDEV_TX_OK;
 403         return rc;
 404 }   /*  end of claw_tx */
 405
 406 /*------------------------------------------------------------------*
 407  *  pack the collect queue into an skb and return it                *
 408  *   If not packing just return the top skb from the queue          *
 409  *------------------------------------------------------------------*/
 410
 411 static struct sk_buff *
 412 claw_pack_skb(struct claw_privbk *privptr)
 413 {
 414         struct sk_buff *new_skb,*held_skb;
 415         struct chbk *p_ch = &privptr->channel[WRITE_CHANNEL];
 416         struct claw_env  *p_env = privptr->p_env;
 417         int     pkt_cnt,pk_ind,so_far;
 418
 419         new_skb = NULL;         /* assume no dice */
 420         pkt_cnt = 0;
 421         CLAW_DBF_TEXT(4, trace, "PackSKBe");
 422         if (!skb_queue_empty(&p_ch->collect_queue)) {
 423         /* some data */
 424                 held_skb = skb_dequeue(&p_ch->collect_queue);
 425                 if (held_skb)
 426                         dev_kfree_skb_any(held_skb);
 427                 else
 428                         return NULL;
 429                 if (p_env->packing != DO_PACKED)
 430                         return held_skb;
 431                 /* get a new SKB we will pack at least one */
 432                 new_skb = dev_alloc_skb(p_env->write_size);
 433                 if (new_skb == NULL) {
 434                         atomic_inc(&held_skb->users);
 435                         skb_queue_head(&p_ch->collect_queue,held_skb);
 436                         return NULL;
 437                 }
 438                 /* we have packed packet and a place to put it  */
 439                 pk_ind = 1;
 440                 so_far = 0;
 441                 new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
 442                 while ((pk_ind) && (held_skb != NULL)) {
 443                         if (held_skb->len+so_far <= p_env->write_size-8) {
 444                                 memcpy(skb_put(new_skb,held_skb->len),
 445                                         held_skb->data,held_skb->len);
 446                                 privptr->stats.tx_packets++;
 447                                 so_far += held_skb->len;
 448                                 pkt_cnt++;
 449                                 dev_kfree_skb_any(held_skb);
 450                                 held_skb = skb_dequeue(&p_ch->collect_queue);
 451                                 if (held_skb)
 452                                         atomic_dec(&held_skb->users);
 453                         } else {
 454                                 pk_ind = 0;
 455                                 atomic_inc(&held_skb->users);
 456                                 skb_queue_head(&p_ch->collect_queue,held_skb);
 457                         }
 458                 }
 459         }
 460         CLAW_DBF_TEXT(4, trace, "PackSKBx");
 461         return new_skb;
 462 }
 463
 464 /*-------------------------------------------------------------------*
 465  *   claw_change_mtu                                                 *
 466  *                                                                   *
 467  *-------------------------------------------------------------------*/
 468
 469 static int
 470 claw_change_mtu(struct net_device *dev, int new_mtu)
 471 {
 472         struct claw_privbk *privptr = dev->ml_priv;
 473         int buff_size;
 474         CLAW_DBF_TEXT(4, trace, "setmtu");
 475         buff_size = privptr->p_env->write_size;
 476         if ((new_mtu < 60) || (new_mtu > buff_size)) {
 477                 return -EINVAL;
 478         }
 479         dev->mtu = new_mtu;
 480         return 0;
 481 }  /*   end of claw_change_mtu */
 482
 483
 484 /*-------------------------------------------------------------------*
 485  *   claw_open                                                       *
 486  *                                                                   *
 487  *-------------------------------------------------------------------*/
 488 static int
 489 claw_open(struct net_device *dev)
 490 {
 491
 492         int     rc;
 493         int     i;
 494         unsigned long       saveflags=0;
 495         unsigned long       parm;
 496         struct claw_privbk  *privptr;
 497         DECLARE_WAITQUEUE(wait, current);
 498         struct timer_list  timer;
 499         struct ccwbk *p_buf;
 500
 501         CLAW_DBF_TEXT(4, trace, "open");
 502         privptr = (struct claw_privbk *)dev->ml_priv;
 503         /*   allocate and initialize CCW blocks */
 504         if (privptr->buffs_alloc == 0) {
 505                 rc=init_ccw_bk(dev);
 506                 if (rc) {
 507                         CLAW_DBF_TEXT(2, trace, "openmem");
 508                         return -ENOMEM;
 509                 }
 510         }
 511         privptr->system_validate_comp=0;
 512         privptr->release_pend=0;
 513         if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
 514                 privptr->p_env->read_size=DEF_PACK_BUFSIZE;
 515                 privptr->p_env->write_size=DEF_PACK_BUFSIZE;
 516                 privptr->p_env->packing=PACKING_ASK;
 517         } else {
 518                 privptr->p_env->packing=0;
 519                 privptr->p_env->read_size=CLAW_FRAME_SIZE;
 520                 privptr->p_env->write_size=CLAW_FRAME_SIZE;
 521         }
 522         claw_set_busy(dev);
 523         tasklet_init(&privptr->channel[READ_CHANNEL].tasklet, claw_irq_tasklet,
 524                 (unsigned long) &privptr->channel[READ_CHANNEL]);
 525         for ( i = 0; i < 2;  i++) {
 526                 CLAW_DBF_TEXT_(2, trace, "opn_ch%d", i);
 527                 init_waitqueue_head(&privptr->channel[i].wait);
 528                 /* skb_queue_head_init(&p_ch->io_queue); */
 529                 if (i == WRITE_CHANNEL)
 530                         skb_queue_head_init(
 531                                 &privptr->channel[WRITE_CHANNEL].collect_queue);
 532                 privptr->channel[i].flag_a = 0;
 533                 privptr->channel[i].IO_active = 0;
 534                 privptr->channel[i].flag  &= ~CLAW_TIMER;
 535                 init_timer(&timer);
 536                 timer.function = (void *)claw_timer;
 537                 timer.data = (unsigned long)(&privptr->channel[i]);
 538                 timer.expires = jiffies + 15*HZ;
 539                 add_timer(&timer);
 540                 spin_lock_irqsave(get_ccwdev_lock(
 541                         privptr->channel[i].cdev), saveflags);
 542                 parm = (unsigned long) &privptr->channel[i];
 543                 privptr->channel[i].claw_state = CLAW_START_HALT_IO;
 544                 rc = 0;
 545                 add_wait_queue(&privptr->channel[i].wait, &wait);
 546                 rc = ccw_device_halt(
 547                         (struct ccw_device *)privptr->channel[i].cdev,parm);
 548                 set_current_state(TASK_INTERRUPTIBLE);
 549                 spin_unlock_irqrestore(
 550                         get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
 551                 schedule();
 552                 set_current_state(TASK_RUNNING);
 553                 remove_wait_queue(&privptr->channel[i].wait, &wait);
 554                 if(rc != 0)
 555                         ccw_check_return_code(privptr->channel[i].cdev, rc);
 556                 if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
 557                         del_timer(&timer);
 558         }
 559         if ((((privptr->channel[READ_CHANNEL].last_dstat |
 560                 privptr->channel[WRITE_CHANNEL].last_dstat) &
 561            ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
 562            (((privptr->channel[READ_CHANNEL].flag |
 563                 privptr->channel[WRITE_CHANNEL].flag) & CLAW_TIMER) != 0x00)) {
 564                 dev_info(&privptr->channel[READ_CHANNEL].cdev->dev,
 565                         "%s: remote side is not ready\n", dev->name);
 566                 CLAW_DBF_TEXT(2, trace, "notrdy");
 567
 568                 for ( i = 0; i < 2;  i++) {
 569                         spin_lock_irqsave(
 570                                 get_ccwdev_lock(privptr->channel[i].cdev),
 571                                 saveflags);
 572                         parm = (unsigned long) &privptr->channel[i];
 573                         privptr->channel[i].claw_state = CLAW_STOP;
 574                         rc = ccw_device_halt(
 575                                 (struct ccw_device *)&privptr->channel[i].cdev,
 576                                 parm);
 577                         spin_unlock_irqrestore(
 578                                 get_ccwdev_lock(privptr->channel[i].cdev),
 579                                 saveflags);
 580                         if (rc != 0) {
 581                                 ccw_check_return_code(
 582                                         privptr->channel[i].cdev, rc);
 583                         }
 584                 }
 585                 free_pages((unsigned long)privptr->p_buff_ccw,
 586                         (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
 587                 if (privptr->p_env->read_size < PAGE_SIZE) {
 588                         free_pages((unsigned long)privptr->p_buff_read,
 589                                (int)pages_to_order_of_mag(
 590                                         privptr->p_buff_read_num));
 591                 }
 592                 else {
 593                         p_buf=privptr->p_read_active_first;
 594                         while (p_buf!=NULL) {
 595                                 free_pages((unsigned long)p_buf->p_buffer,
 596                                       (int)pages_to_order_of_mag(
 597                                         privptr->p_buff_pages_perread ));
 598                                 p_buf=p_buf->next;
 599                         }
 600                 }
 601                 if (privptr->p_env->write_size < PAGE_SIZE ) {
 602                         free_pages((unsigned long)privptr->p_buff_write,
 603                              (int)pages_to_order_of_mag(
 604                                 privptr->p_buff_write_num));
 605                 }
 606                 else {
 607                         p_buf=privptr->p_write_active_first;
 608                         while (p_buf!=NULL) {
 609                                 free_pages((unsigned long)p_buf->p_buffer,
 610                                      (int)pages_to_order_of_mag(
 611                                         privptr->p_buff_pages_perwrite ));
 612                                 p_buf=p_buf->next;
 613                         }
 614                 }
 615                 privptr->buffs_alloc = 0;
 616                 privptr->channel[READ_CHANNEL].flag = 0x00;
 617                 privptr->channel[WRITE_CHANNEL].flag = 0x00;
 618                 privptr->p_buff_ccw=NULL;
 619                 privptr->p_buff_read=NULL;
 620                 privptr->p_buff_write=NULL;
 621                 claw_clear_busy(dev);
 622                 CLAW_DBF_TEXT(2, trace, "open EIO");
 623                 return -EIO;
 624         }
 625
 626         /*   Send SystemValidate command */
 627
 628         claw_clear_busy(dev);
 629         CLAW_DBF_TEXT(4, trace, "openok");
 630         return 0;
 631 }    /*     end of claw_open    */
 632
 633 /*-------------------------------------------------------------------*
 634 *                                                                    *
 635 *       claw_irq_handler                                             *
 636 *                                                                    *
 637 *--------------------------------------------------------------------*/
 638 static void
 639 claw_irq_handler(struct ccw_device *cdev,
 640         unsigned long intparm, struct irb *irb)
 641 {
 642         struct chbk *p_ch = NULL;
 643         struct claw_privbk *privptr = NULL;
 644         struct net_device *dev = NULL;
 645         struct claw_env  *p_env;
 646         struct chbk *p_ch_r=NULL;
 647
 648         kstat_cpu(smp_processor_id()).irqs[IOINT_CLW]++;
 649         CLAW_DBF_TEXT(4, trace, "clawirq");
 650         /* Bypass all 'unsolicited interrupts' */
 651         privptr = dev_get_drvdata(&cdev->dev);
 652         if (!privptr) {
 653                 dev_warn(&cdev->dev, "An uninitialized CLAW device received an"
 654                         " IRQ, c-%02x d-%02x\n",
 655                         irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
 656                 CLAW_DBF_TEXT(2, trace, "badirq");
 657                 return;
 658         }
 659
 660         /* Try to extract channel from driver data. */
 661         if (privptr->channel[READ_CHANNEL].cdev == cdev)
 662                 p_ch = &privptr->channel[READ_CHANNEL];
 663         else if (privptr->channel[WRITE_CHANNEL].cdev == cdev)
 664                 p_ch = &privptr->channel[WRITE_CHANNEL];
 665         else {
 666                 dev_warn(&cdev->dev, "The device is not a CLAW device\n");
 667                 CLAW_DBF_TEXT(2, trace, "badchan");
 668                 return;
 669         }
 670         CLAW_DBF_TEXT_(4, trace, "IRQCH=%d", p_ch->flag);
 671
 672         dev = (struct net_device *) (p_ch->ndev);
 673         p_env=privptr->p_env;
 674
 675         /* Copy interruption response block. */
 676         memcpy(p_ch->irb, irb, sizeof(struct irb));
 677
 678         /* Check for good subchannel return code, otherwise info message */
 679         if (irb->scsw.cmd.cstat && !(irb->scsw.cmd.cstat & SCHN_STAT_PCI)) {
 680                 dev_info(&cdev->dev,
 681                         "%s: subchannel check for device: %04x -"
 682                         " Sch Stat %02x  Dev Stat %02x CPA - %04x\n",
 683                         dev->name, p_ch->devno,
 684                         irb->scsw.cmd.cstat, irb->scsw.cmd.dstat,
 685                         irb->scsw.cmd.cpa);
 686                 CLAW_DBF_TEXT(2, trace, "chanchk");
 687                 /* return; */
 688         }
 689
 690         /* Check the reason-code of a unit check */
 691         if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
 692                 ccw_check_unit_check(p_ch, irb->ecw[0]);
 693
 694         /* State machine to bring the connection up, down and to restart */
 695         p_ch->last_dstat = irb->scsw.cmd.dstat;
 696
 697         switch (p_ch->claw_state) {
 698         case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
 699                 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
 700                 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
 701                 (p_ch->irb->scsw.cmd.stctl ==
 702                 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND))))
 703                         return;
 704                 wake_up(&p_ch->wait);   /* wake up claw_release */
 705                 CLAW_DBF_TEXT(4, trace, "stop");
 706                 return;
 707         case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open  */
 708                 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
 709                 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
 710                 (p_ch->irb->scsw.cmd.stctl ==
 711                 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
 712                         CLAW_DBF_TEXT(4, trace, "haltio");
 713                         return;
 714                 }
 715                 if (p_ch->flag == CLAW_READ) {
 716                         p_ch->claw_state = CLAW_START_READ;
 717                         wake_up(&p_ch->wait); /* wake claw_open (READ)*/
 718                 } else if (p_ch->flag == CLAW_WRITE) {
 719                         p_ch->claw_state = CLAW_START_WRITE;
 720                         /*      send SYSTEM_VALIDATE                    */
 721                         claw_strt_read(dev, LOCK_NO);
 722                         claw_send_control(dev,
 723                                 SYSTEM_VALIDATE_REQUEST,
 724                                 0, 0, 0,
 725                                 p_env->host_name,
 726                                 p_env->adapter_name);
 727                 } else {
 728                         dev_warn(&cdev->dev, "The CLAW device received"
 729                                 " an unexpected IRQ, "
 730                                 "c-%02x d-%02x\n",
 731                                 irb->scsw.cmd.cstat,
 732                                 irb->scsw.cmd.dstat);
 733                         return;
 734                         }
 735                 CLAW_DBF_TEXT(4, trace, "haltio");
 736                 return;
 737         case CLAW_START_READ:
 738                 CLAW_DBF_TEXT(4, trace, "ReadIRQ");
 739                 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
 740                         clear_bit(0, (void *)&p_ch->IO_active);
 741                         if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
 742                             (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
 743                             (p_ch->irb->ecw[0])        == 0) {
 744                                 privptr->stats.rx_errors++;
 745                                 dev_info(&cdev->dev,
 746                                         "%s: Restart is required after remote "
 747                                         "side recovers \n",
 748                                         dev->name);
 749                         }
 750                         CLAW_DBF_TEXT(4, trace, "notrdy");
 751                         return;
 752                 }
 753                 if ((p_ch->irb->scsw.cmd.cstat & SCHN_STAT_PCI) &&
 754                         (p_ch->irb->scsw.cmd.dstat == 0)) {
 755                         if (test_and_set_bit(CLAW_BH_ACTIVE,
 756                                 (void *)&p_ch->flag_a) == 0)
 757                                 tasklet_schedule(&p_ch->tasklet);
 758                         else
 759                                 CLAW_DBF_TEXT(4, trace, "PCINoBH");
 760                         CLAW_DBF_TEXT(4, trace, "PCI_read");
 761                         return;
 762                 }
 763                 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
 764                  (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
 765                  (p_ch->irb->scsw.cmd.stctl ==
 766                  (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
 767                         CLAW_DBF_TEXT(4, trace, "SPend_rd");
 768                         return;
 769                 }
 770                 clear_bit(0, (void *)&p_ch->IO_active);
 771                 claw_clearbit_busy(TB_RETRY, dev);
 772                 if (test_and_set_bit(CLAW_BH_ACTIVE,
 773                         (void *)&p_ch->flag_a) == 0)
 774                         tasklet_schedule(&p_ch->tasklet);
 775                 else
 776                         CLAW_DBF_TEXT(4, trace, "RdBHAct");
 777                 CLAW_DBF_TEXT(4, trace, "RdIRQXit");
 778                 return;
 779         case CLAW_START_WRITE:
 780                 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
 781                         dev_info(&cdev->dev,
 782                                 "%s: Unit Check Occurred in "
 783                                 "write channel\n", dev->name);
 784                         clear_bit(0, (void *)&p_ch->IO_active);
 785                         if (p_ch->irb->ecw[0] & 0x80) {
 786                                 dev_info(&cdev->dev,
 787                                         "%s: Resetting Event "
 788                                         "occurred:\n", dev->name);
 789                                 init_timer(&p_ch->timer);
 790                                 p_ch->timer.function =
 791                                         (void *)claw_write_retry;
 792                                 p_ch->timer.data = (unsigned long)p_ch;
 793                                 p_ch->timer.expires = jiffies + 10*HZ;
 794                                 add_timer(&p_ch->timer);
 795                                 dev_info(&cdev->dev,
 796                                         "%s: write connection "
 797                                         "restarting\n", dev->name);
 798                         }
 799                         CLAW_DBF_TEXT(4, trace, "rstrtwrt");
 800                         return;
 801                 }
 802                 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) {
 803                         clear_bit(0, (void *)&p_ch->IO_active);
 804                         dev_info(&cdev->dev,
 805                                 "%s: Unit Exception "
 806                                 "occurred in write channel\n",
 807                                 dev->name);
 808                 }
 809                 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
 810                 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
 811                 (p_ch->irb->scsw.cmd.stctl ==
 812                 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
 813                         CLAW_DBF_TEXT(4, trace, "writeUE");
 814                         return;
 815                 }
 816                 clear_bit(0, (void *)&p_ch->IO_active);
 817                 if (claw_test_and_setbit_busy(TB_TX, dev) == 0) {
 818                         claw_write_next(p_ch);
 819                         claw_clearbit_busy(TB_TX, dev);
 820                         claw_clear_busy(dev);
 821                 }
 822                 p_ch_r = (struct chbk *)&privptr->channel[READ_CHANNEL];
 823                 if (test_and_set_bit(CLAW_BH_ACTIVE,
 824                         (void *)&p_ch_r->flag_a) == 0)
 825                         tasklet_schedule(&p_ch_r->tasklet);
 826                 CLAW_DBF_TEXT(4, trace, "StWtExit");
 827                 return;
 828         default:
 829                 dev_warn(&cdev->dev,
 830                         "The CLAW device for %s received an unexpected IRQ\n",
 831                          dev->name);
 832                 CLAW_DBF_TEXT(2, trace, "badIRQ");
 833                 return;
 834         }
 835
 836 }       /*   end of claw_irq_handler    */
 837
 838
 839 /*-------------------------------------------------------------------*
 840 *       claw_irq_tasklet                                             *
 841 *                                                                    *
 842 *--------------------------------------------------------------------*/
 843 static void
 844 claw_irq_tasklet ( unsigned long data )
 845 {
 846         struct chbk * p_ch;
 847         struct net_device  *dev;
 848
 849         p_ch = (struct chbk *) data;
 850         dev = (struct net_device *)p_ch->ndev;
 851         CLAW_DBF_TEXT(4, trace, "IRQtask");
 852         unpack_read(dev);
 853         clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
 854         CLAW_DBF_TEXT(4, trace, "TskletXt");
 855         return;
 856 }       /*    end of claw_irq_bh    */
 857
 858 /*-------------------------------------------------------------------*
 859 *       claw_release                                                 *
 860 *                                                                    *
 861 *--------------------------------------------------------------------*/
 862 static int
 863 claw_release(struct net_device *dev)
 864 {
 865         int                rc;
 866         int                i;
 867         unsigned long      saveflags;
 868         unsigned long      parm;
 869         struct claw_privbk *privptr;
 870         DECLARE_WAITQUEUE(wait, current);
 871         struct ccwbk*             p_this_ccw;
 872         struct ccwbk*             p_buf;
 873
 874         if (!dev)
 875                 return 0;
 876         privptr = (struct claw_privbk *)dev->ml_priv;
 877         if (!privptr)
 878                 return 0;
 879         CLAW_DBF_TEXT(4, trace, "release");
 880         privptr->release_pend=1;
 881         claw_setbit_busy(TB_STOP,dev);
 882         for ( i = 1; i >=0 ;  i--) {
 883                 spin_lock_irqsave(
 884                         get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
 885              /*   del_timer(&privptr->channel[READ_CHANNEL].timer);  */
 886                 privptr->channel[i].claw_state = CLAW_STOP;
 887                 privptr->channel[i].IO_active = 0;
 888                 parm = (unsigned long) &privptr->channel[i];
 889                 if (i == WRITE_CHANNEL)
 890                         claw_purge_skb_queue(
 891                                 &privptr->channel[WRITE_CHANNEL].collect_queue);
 892                 rc = ccw_device_halt (privptr->channel[i].cdev, parm);
 893                 if (privptr->system_validate_comp==0x00)  /* never opened? */
 894                    init_waitqueue_head(&privptr->channel[i].wait);
 895                 add_wait_queue(&privptr->channel[i].wait, &wait);
 896                 set_current_state(TASK_INTERRUPTIBLE);
 897                 spin_unlock_irqrestore(
 898                         get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
 899                 schedule();
 900                 set_current_state(TASK_RUNNING);
 901                 remove_wait_queue(&privptr->channel[i].wait, &wait);
 902                 if (rc != 0) {
 903                         ccw_check_return_code(privptr->channel[i].cdev, rc);
 904                 }
 905         }
 906         if (privptr->pk_skb != NULL) {
 907                 dev_kfree_skb_any(privptr->pk_skb);
 908                 privptr->pk_skb = NULL;
 909         }
 910         if(privptr->buffs_alloc != 1) {
 911                 CLAW_DBF_TEXT(4, trace, "none2fre");
 912                 return 0;
 913         }
 914         CLAW_DBF_TEXT(4, trace, "freebufs");
 915         if (privptr->p_buff_ccw != NULL) {
 916                 free_pages((unsigned long)privptr->p_buff_ccw,
 917                         (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
 918         }
 919         CLAW_DBF_TEXT(4, trace, "freeread");
 920         if (privptr->p_env->read_size < PAGE_SIZE) {
 921             if (privptr->p_buff_read != NULL) {
 922                 free_pages((unsigned long)privptr->p_buff_read,
 923                       (int)pages_to_order_of_mag(privptr->p_buff_read_num));
 924                 }
 925         }
 926         else {
 927                 p_buf=privptr->p_read_active_first;
 928                 while (p_buf!=NULL) {
 929                         free_pages((unsigned long)p_buf->p_buffer,
 930                              (int)pages_to_order_of_mag(
 931                                 privptr->p_buff_pages_perread ));
 932                         p_buf=p_buf->next;
 933                 }
 934         }
 935          CLAW_DBF_TEXT(4, trace, "freewrit");
 936         if (privptr->p_env->write_size < PAGE_SIZE ) {
 937                 free_pages((unsigned long)privptr->p_buff_write,
 938                       (int)pages_to_order_of_mag(privptr->p_buff_write_num));
 939         }
 940         else {
 941                 p_buf=privptr->p_write_active_first;
 942                 while (p_buf!=NULL) {
 943                         free_pages((unsigned long)p_buf->p_buffer,
 944                               (int)pages_to_order_of_mag(
 945                               privptr->p_buff_pages_perwrite ));
 946                         p_buf=p_buf->next;
 947                 }
 948         }
 949          CLAW_DBF_TEXT(4, trace, "clearptr");
 950         privptr->buffs_alloc = 0;
 951         privptr->p_buff_ccw=NULL;
 952         privptr->p_buff_read=NULL;
 953         privptr->p_buff_write=NULL;
 954         privptr->system_validate_comp=0;
 955         privptr->release_pend=0;
 956         /*      Remove any writes that were pending and reset all reads   */
 957         p_this_ccw=privptr->p_read_active_first;
 958         while (p_this_ccw!=NULL) {
 959                 p_this_ccw->header.length=0xffff;
 960                 p_this_ccw->header.opcode=0xff;
 961                 p_this_ccw->header.flag=0x00;
 962                 p_this_ccw=p_this_ccw->next;
 963         }
 964
 965         while (privptr->p_write_active_first!=NULL) {
 966                 p_this_ccw=privptr->p_write_active_first;
 967                 p_this_ccw->header.flag=CLAW_PENDING;
 968                 privptr->p_write_active_first=p_this_ccw->next;
 969                 p_this_ccw->next=privptr->p_write_free_chain;
 970                 privptr->p_write_free_chain=p_this_ccw;
 971                 ++privptr->write_free_count;
 972         }
 973         privptr->p_write_active_last=NULL;
 974         privptr->mtc_logical_link = -1;
 975         privptr->mtc_skipping = 1;
 976         privptr->mtc_offset=0;
 977
 978         if (((privptr->channel[READ_CHANNEL].last_dstat |
 979                 privptr->channel[WRITE_CHANNEL].last_dstat) &
 980                 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
 981                 dev_warn(&privptr->channel[READ_CHANNEL].cdev->dev,
 982                         "Deactivating %s completed with incorrect"
 983                         " subchannel status "
 984                         "(read %02x, write %02x)\n",
 985                 dev->name,
 986                 privptr->channel[READ_CHANNEL].last_dstat,
 987                 privptr->channel[WRITE_CHANNEL].last_dstat);
 988                  CLAW_DBF_TEXT(2, trace, "badclose");
 989         }
 990         CLAW_DBF_TEXT(4, trace, "rlsexit");
 991         return 0;
 992 }      /* end of claw_release     */
 993
 994 /*-------------------------------------------------------------------*
 995 *       claw_write_retry                                             *
 996 *                                                                    *
 997 *--------------------------------------------------------------------*/
 998
 999 static void
1000 claw_write_retry ( struct chbk *p_ch )
1001 {
1002
1003         struct net_device  *dev=p_ch->ndev;
1004
1005         CLAW_DBF_TEXT(4, trace, "w_retry");
1006         if (p_ch->claw_state == CLAW_STOP) {
1007                 return;
1008         }
1009         claw_strt_out_IO( dev );
1010         CLAW_DBF_TEXT(4, trace, "rtry_xit");
1011         return;
1012 }      /* end of claw_write_retry      */
1013
1014
1015 /*-------------------------------------------------------------------*
1016 *       claw_write_next                                              *
1017 *                                                                    *
1018 *--------------------------------------------------------------------*/
1019
1020 static void
1021 claw_write_next ( struct chbk * p_ch )
1022 {
1023
1024         struct net_device  *dev;
1025         struct claw_privbk *privptr=NULL;
1026         struct sk_buff *pk_skb;
1027
1028         CLAW_DBF_TEXT(4, trace, "claw_wrt");
1029         if (p_ch->claw_state == CLAW_STOP)
1030                 return;
1031         dev = (struct net_device *) p_ch->ndev;
1032         privptr = (struct claw_privbk *) dev->ml_priv;
1033         claw_free_wrt_buf( dev );
1034         if ((privptr->write_free_count > 0) &&
1035             !skb_queue_empty(&p_ch->collect_queue)) {
1036                 pk_skb = claw_pack_skb(privptr);
1037                 while (pk_skb != NULL) {
1038                         claw_hw_tx(pk_skb, dev, 1);
1039                         if (privptr->write_free_count > 0) {
1040                                 pk_skb = claw_pack_skb(privptr);
1041                         } else
1042                                 pk_skb = NULL;
1043                 }
1044         }
1045         if (privptr->p_write_active_first!=NULL) {
1046                 claw_strt_out_IO(dev);
1047         }
1048         return;
1049 }      /* end of claw_write_next      */
1050
1051 /*-------------------------------------------------------------------*
1052 *                                                                    *
1053 *       claw_timer                                                   *
1054 *--------------------------------------------------------------------*/
1055
1056 static void
1057 claw_timer ( struct chbk * p_ch )
1058 {
1059         CLAW_DBF_TEXT(4, trace, "timer");
1060         p_ch->flag |= CLAW_TIMER;
1061         wake_up(&p_ch->wait);
1062         return;
1063 }      /* end of claw_timer  */
1064
1065 /*
1066 *
1067 *       functions
1068 */
1069
1070
1071 /*-------------------------------------------------------------------*
1072 *                                                                    *
1073 *     pages_to_order_of_mag                                          *
1074 *                                                                    *
1075 *    takes a number of pages from 1 to 512 and returns the           *
1076 *    log(num_pages)/log(2) get_free_pages() needs a base 2 order     *
1077 *    of magnitude get_free_pages() has an upper order of 9           *
1078 *--------------------------------------------------------------------*/
1079
1080 static int
1081 pages_to_order_of_mag(int num_of_pages)
1082 {
1083         int     order_of_mag=1;         /* assume 2 pages */
1084         int     nump;
1085
1086         CLAW_DBF_TEXT_(5, trace, "pages%d", num_of_pages);
1087         if (num_of_pages == 1)   {return 0; }  /* magnitude of 0 = 1 page */
1088         /* 512 pages = 2Meg on 4k page systems */
1089         if (num_of_pages >= 512) {return 9; }
1090         /* we have two or more pages order is at least 1 */
1091         for (nump=2 ;nump <= 512;nump*=2) {
1092           if (num_of_pages <= nump)
1093                   break;
1094           order_of_mag +=1;
1095         }
1096         if (order_of_mag > 9) { order_of_mag = 9; }  /* I know it's paranoid */
1097         CLAW_DBF_TEXT_(5, trace, "mag%d", order_of_mag);
1098         return order_of_mag;
1099 }
1100
1101 /*-------------------------------------------------------------------*
1102 *                                                                    *
1103 *     add_claw_reads                                                 *
1104 *                                                                    *
1105 *--------------------------------------------------------------------*/
1106 static int
1107 add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
1108         struct ccwbk* p_last)
1109 {
1110         struct claw_privbk *privptr;
1111         struct ccw1  temp_ccw;
1112         struct endccw * p_end;
1113         CLAW_DBF_TEXT(4, trace, "addreads");
1114         privptr = dev->ml_priv;
1115         p_end = privptr->p_end_ccw;
1116
1117         /* first CCW and last CCW contains a new set of read channel programs
1118         *       to apend the running channel programs
1119         */
1120         if ( p_first==NULL) {
1121                 CLAW_DBF_TEXT(4, trace, "addexit");
1122                 return 0;
1123         }
1124
1125         /* set up ending CCW sequence for this segment */
1126         if (p_end->read1) {
1127                 p_end->read1=0x00;    /*  second ending CCW is now active */
1128                 /*      reset ending CCWs and setup TIC CCWs              */
1129                 p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1130                 p_end->read2_nop2.flags  = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1131                 p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
1132                 p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
1133                 p_end->read2_nop2.cda=0;
1134                 p_end->read2_nop2.count=1;
1135         }
1136         else {
1137                 p_end->read1=0x01;  /* first ending CCW is now active */
1138                 /*      reset ending CCWs and setup TIC CCWs          */
1139                 p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1140                 p_end->read1_nop2.flags  = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1141                 p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
1142                 p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
1143                 p_end->read1_nop2.cda=0;
1144                 p_end->read1_nop2.count=1;
1145         }
1146
1147         if ( privptr-> p_read_active_first ==NULL ) {
1148                 privptr->p_read_active_first = p_first;  /*  set new first */
1149                 privptr->p_read_active_last  = p_last;   /*  set new last  */
1150         }
1151         else {
1152
1153                 /* set up TIC ccw  */
1154                 temp_ccw.cda= (__u32)__pa(&p_first->read);
1155                 temp_ccw.count=0;
1156                 temp_ccw.flags=0;
1157                 temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
1158
1159
1160                 if (p_end->read1) {
1161
1162                /* first set of CCW's is chained to the new read              */
1163                /* chain, so the second set is chained to the active chain.   */
1164                /* Therefore modify the second set to point to the new        */
1165                /* read chain set up TIC CCWs                                 */
1166                /* make sure we update the CCW so channel doesn't fetch it    */
1167                /* when it's only half done                                   */
1168                         memcpy( &p_end->read2_nop2, &temp_ccw ,
1169                                 sizeof(struct ccw1));
1170                         privptr->p_read_active_last->r_TIC_1.cda=
1171                                 (__u32)__pa(&p_first->read);
1172                         privptr->p_read_active_last->r_TIC_2.cda=
1173                                 (__u32)__pa(&p_first->read);
1174                 }
1175                 else {
1176                         /* make sure we update the CCW so channel doesn't   */
1177                         /* fetch it when it is only half done               */
1178                         memcpy( &p_end->read1_nop2, &temp_ccw ,
1179                                 sizeof(struct ccw1));
1180                         privptr->p_read_active_last->r_TIC_1.cda=
1181                                 (__u32)__pa(&p_first->read);
1182                         privptr->p_read_active_last->r_TIC_2.cda=
1183                                 (__u32)__pa(&p_first->read);
1184                 }
1185                 /*      chain in new set of blocks                         */
1186                 privptr->p_read_active_last->next = p_first;
1187                 privptr->p_read_active_last=p_last;
1188         } /* end of if ( privptr-> p_read_active_first ==NULL)  */
1189         CLAW_DBF_TEXT(4, trace, "addexit");
1190         return 0;
1191 }    /*     end of add_claw_reads   */
1192
1193 /*-------------------------------------------------------------------*
1194  *   ccw_check_return_code                                           *
1195  *                                                                   *
1196  *-------------------------------------------------------------------*/
1197
1198 static void
1199 ccw_check_return_code(struct ccw_device *cdev, int return_code)
1200 {
1201         CLAW_DBF_TEXT(4, trace, "ccwret");
1202         if (return_code != 0) {
1203                 switch (return_code) {
1204                 case -EBUSY: /* BUSY is a transient state no action needed */
1205                         break;
1206                 case -ENODEV:
1207                         dev_err(&cdev->dev, "The remote channel adapter is not"
1208                                 " available\n");
1209                         break;
1210                 case -EINVAL:
1211                         dev_err(&cdev->dev,
1212                                 "The status of the remote channel adapter"
1213                                 " is not valid\n");
1214                         break;
1215                 default:
1216                         dev_err(&cdev->dev, "The common device layer"
1217                                 " returned error code %d\n",
1218                                   return_code);
1219                 }
1220         }
1221         CLAW_DBF_TEXT(4, trace, "ccwret");
1222 }    /*    end of ccw_check_return_code   */
1223
1224 /*-------------------------------------------------------------------*
1225 *       ccw_check_unit_check                                         *
1226 *--------------------------------------------------------------------*/
1227
1228 static void
1229 ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
1230 {
1231         struct net_device *ndev = p_ch->ndev;
1232         struct device *dev = &p_ch->cdev->dev;
1233
1234         CLAW_DBF_TEXT(4, trace, "unitchek");
1235         dev_warn(dev, "The communication peer of %s disconnected\n",
1236                 ndev->name);
1237
1238         if (sense & 0x40) {
1239                 if (sense & 0x01) {
1240                         dev_warn(dev, "The remote channel adapter for"
1241                                 " %s has been reset\n",
1242                                 ndev->name);
1243                 }
1244         } else if (sense & 0x20) {
1245                 if (sense & 0x04) {
1246                         dev_warn(dev, "A data streaming timeout occurred"
1247                                 " for %s\n",
1248                                 ndev->name);
1249                 } else if (sense & 0x10) {
1250                         dev_warn(dev, "The remote channel adapter for %s"
1251                                 " is faulty\n",
1252                                 ndev->name);
1253                 } else {
1254                         dev_warn(dev, "A data transfer parity error occurred"
1255                                 " for %s\n",
1256                                 ndev->name);
1257                 }
1258         } else if (sense & 0x10) {
1259                 dev_warn(dev, "A read data parity error occurred"
1260                         " for %s\n",
1261                         ndev->name);
1262         }
1263
1264 }   /*    end of ccw_check_unit_check    */
1265
1266 /*-------------------------------------------------------------------*
1267 *               find_link                                            *
1268 *--------------------------------------------------------------------*/
1269 static int
1270 find_link(struct net_device *dev, char *host_name, char *ws_name )
1271 {
1272         struct claw_privbk *privptr;
1273         struct claw_env *p_env;
1274         int    rc=0;
1275
1276         CLAW_DBF_TEXT(2, setup, "findlink");
1277         privptr = dev->ml_priv;
1278         p_env=privptr->p_env;
1279         switch (p_env->packing)
1280         {
1281                 case  PACKING_ASK:
1282                         if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
1283                             (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
1284                              rc = EINVAL;
1285                         break;
1286                 case  DO_PACKED:
1287                 case  PACK_SEND:
1288                         if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
1289                             (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
1290                                 rc = EINVAL;
1291                         break;
1292                 default:
1293                         if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
1294                             (memcmp(p_env->api_type , ws_name, 8)!=0))
1295                                 rc = EINVAL;
1296                         break;
1297         }
1298
1299         return rc;
1300 }    /*    end of find_link    */
1301
1302 /*-------------------------------------------------------------------*
1303  *   claw_hw_tx                                                      *
1304  *                                                                   *
1305  *                                                                   *
1306  *-------------------------------------------------------------------*/
1307
1308 static int
1309 claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
1310 {
1311         int                             rc=0;
1312         struct claw_privbk              *privptr;
1313         struct ccwbk           *p_this_ccw;
1314         struct ccwbk           *p_first_ccw;
1315         struct ccwbk           *p_last_ccw;
1316         __u32                           numBuffers;
1317         signed long                     len_of_data;
1318         unsigned long                   bytesInThisBuffer;
1319         unsigned char                   *pDataAddress;
1320         struct endccw                   *pEnd;
1321         struct ccw1                     tempCCW;
1322         struct claw_env                 *p_env;
1323         struct clawph                   *pk_head;
1324         struct chbk                     *ch;
1325
1326         CLAW_DBF_TEXT(4, trace, "hw_tx");
1327         privptr = (struct claw_privbk *)(dev->ml_priv);
1328         p_env =privptr->p_env;
1329         claw_free_wrt_buf(dev); /* Clean up free chain if posible */
1330         /*  scan the write queue to free any completed write packets   */
1331         p_first_ccw=NULL;
1332         p_last_ccw=NULL;
1333         if ((p_env->packing >= PACK_SEND) &&
1334             (skb->cb[1] != 'P')) {
1335                 skb_push(skb,sizeof(struct clawph));
1336                 pk_head=(struct clawph *)skb->data;
1337                 pk_head->len=skb->len-sizeof(struct clawph);
1338                 if (pk_head->len%4)  {
1339                         pk_head->len+= 4-(pk_head->len%4);
1340                         skb_pad(skb,4-(pk_head->len%4));
1341                         skb_put(skb,4-(pk_head->len%4));
1342                 }
1343                 if (p_env->packing == DO_PACKED)
1344                         pk_head->link_num = linkid;
1345                 else
1346                         pk_head->link_num = 0;
1347                 pk_head->flag = 0x00;
1348                 skb_pad(skb,4);
1349                 skb->cb[1] = 'P';
1350         }
1351         if (linkid == 0) {
1352                 if (claw_check_busy(dev)) {
1353                         if (privptr->write_free_count!=0) {
1354                                 claw_clear_busy(dev);
1355                         }
1356                         else {
1357                                 claw_strt_out_IO(dev );
1358                                 claw_free_wrt_buf( dev );
1359                                 if (privptr->write_free_count==0) {
1360                                         ch = &privptr->channel[WRITE_CHANNEL];
1361                                         atomic_inc(&skb->users);
1362                                         skb_queue_tail(&ch->collect_queue, skb);
1363                                         goto Done;
1364                                 }
1365                                 else {
1366                                         claw_clear_busy(dev);
1367                                 }
1368                         }
1369                 }
1370                 /*  tx lock  */
1371                 if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
1372                         ch = &privptr->channel[WRITE_CHANNEL];
1373                         atomic_inc(&skb->users);
1374                         skb_queue_tail(&ch->collect_queue, skb);
1375                         claw_strt_out_IO(dev );
1376                         rc=-EBUSY;
1377                         goto Done2;
1378                 }
1379         }
1380         /*      See how many write buffers are required to hold this data */
1381         numBuffers = DIV_ROUND_UP(skb->len, privptr->p_env->write_size);
1382
1383         /*      If that number of buffers isn't available, give up for now */
1384         if (privptr->write_free_count < numBuffers ||
1385             privptr->p_write_free_chain == NULL ) {
1386
1387                 claw_setbit_busy(TB_NOBUFFER,dev);
1388                 ch = &privptr->channel[WRITE_CHANNEL];
1389                 atomic_inc(&skb->users);
1390                 skb_queue_tail(&ch->collect_queue, skb);
1391                 CLAW_DBF_TEXT(2, trace, "clawbusy");
1392                 goto Done2;
1393         }
1394         pDataAddress=skb->data;
1395         len_of_data=skb->len;
1396
1397         while (len_of_data > 0) {
1398                 p_this_ccw=privptr->p_write_free_chain;  /* get a block */
1399                 if (p_this_ccw == NULL) { /* lost the race */
1400                         ch = &privptr->channel[WRITE_CHANNEL];
1401                         atomic_inc(&skb->users);
1402                         skb_queue_tail(&ch->collect_queue, skb);
1403                         goto Done2;
1404                 }
1405                 privptr->p_write_free_chain=p_this_ccw->next;
1406                 p_this_ccw->next=NULL;
1407                 --privptr->write_free_count; /* -1 */
1408                 if (len_of_data >= privptr->p_env->write_size)
1409                         bytesInThisBuffer = privptr->p_env->write_size;
1410                 else
1411                         bytesInThisBuffer = len_of_data;
1412                 memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
1413                 len_of_data-=bytesInThisBuffer;
1414                 pDataAddress+=(unsigned long)bytesInThisBuffer;
1415                 /*      setup write CCW         */
1416                 p_this_ccw->write.cmd_code = (linkid * 8) +1;
1417                 if (len_of_data>0) {
1418                         p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
1419                 }
1420                 p_this_ccw->write.count=bytesInThisBuffer;
1421                 /*      now add to end of this chain    */
1422                 if (p_first_ccw==NULL)    {
1423                         p_first_ccw=p_this_ccw;
1424                 }
1425                 if (p_last_ccw!=NULL) {
1426                         p_last_ccw->next=p_this_ccw;
1427                         /*      set up TIC ccws         */
1428                         p_last_ccw->w_TIC_1.cda=
1429                                 (__u32)__pa(&p_this_ccw->write);
1430                 }
1431                 p_last_ccw=p_this_ccw;      /* save new last block */
1432         }
1433
1434         /*      FirstCCW and LastCCW now contain a new set of write channel
1435         *       programs to append to the running channel program
1436         */
1437
1438         if (p_first_ccw!=NULL) {
1439                 /*      setup ending ccw sequence for this segment           */
1440                 pEnd=privptr->p_end_ccw;
1441                 if (pEnd->write1) {
1442                         pEnd->write1=0x00;   /* second end ccw is now active */
1443                         /*      set up Tic CCWs         */
1444                         p_last_ccw->w_TIC_1.cda=
1445                                 (__u32)__pa(&pEnd->write2_nop1);
1446                         pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1447                         pEnd->write2_nop2.flags    =
1448                                 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1449                         pEnd->write2_nop2.cda=0;
1450                         pEnd->write2_nop2.count=1;
1451                 }
1452                 else {  /*  end of if (pEnd->write1)*/
1453                         pEnd->write1=0x01;   /* first end ccw is now active */
1454                         /*      set up Tic CCWs         */
1455                         p_last_ccw->w_TIC_1.cda=
1456                                 (__u32)__pa(&pEnd->write1_nop1);
1457                         pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1458                         pEnd->write1_nop2.flags    =
1459                                 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1460                         pEnd->write1_nop2.cda=0;
1461                         pEnd->write1_nop2.count=1;
1462                 }  /* end if if (pEnd->write1) */
1463
1464                 if (privptr->p_write_active_first==NULL ) {
1465                         privptr->p_write_active_first=p_first_ccw;
1466                         privptr->p_write_active_last=p_last_ccw;
1467                 }
1468                 else {
1469                         /*      set up Tic CCWs         */
1470
1471                         tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
1472                         tempCCW.count=0;
1473                         tempCCW.flags=0;
1474                         tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
1475
1476                         if (pEnd->write1) {
1477
1478                  /*
1479                  * first set of ending CCW's is chained to the new write
1480                  * chain, so the second set is chained to the active chain
1481                  * Therefore modify the second set to point the new write chain.
1482                  * make sure we update the CCW atomically
1483                  * so channel does not fetch it when it's only half done
1484                  */
1485                                 memcpy( &pEnd->write2_nop2, &tempCCW ,
1486                                         sizeof(struct ccw1));
1487                                 privptr->p_write_active_last->w_TIC_1.cda=
1488                                         (__u32)__pa(&p_first_ccw->write);
1489                         }
1490                         else {
1491
1492                         /*make sure we update the CCW atomically
1493                          *so channel does not fetch it when it's only half done
1494                          */
1495                                 memcpy(&pEnd->write1_nop2, &tempCCW ,
1496                                         sizeof(struct ccw1));
1497                                 privptr->p_write_active_last->w_TIC_1.cda=
1498                                         (__u32)__pa(&p_first_ccw->write);
1499
1500                         } /* end if if (pEnd->write1) */
1501
1502                         privptr->p_write_active_last->next=p_first_ccw;
1503                         privptr->p_write_active_last=p_last_ccw;
1504                 }
1505
1506         } /* endif (p_first_ccw!=NULL)  */
1507         dev_kfree_skb_any(skb);
1508         claw_strt_out_IO(dev );
1509         /*      if write free count is zero , set NOBUFFER       */
1510         if (privptr->write_free_count==0) {
1511                 claw_setbit_busy(TB_NOBUFFER,dev);
1512         }
1513 Done2:
1514         claw_clearbit_busy(TB_TX,dev);
1515 Done:
1516         return(rc);
1517 }    /*    end of claw_hw_tx    */
1518
1519 /*-------------------------------------------------------------------*
1520 *                                                                    *
1521 *     init_ccw_bk                                                    *
1522 *                                                                    *
1523 *--------------------------------------------------------------------*/
1524
1525 static int
1526 init_ccw_bk(struct net_device *dev)
1527 {
1528
1529         __u32   ccw_blocks_required;
1530         __u32   ccw_blocks_perpage;
1531         __u32   ccw_pages_required;
1532         __u32   claw_reads_perpage=1;
1533         __u32   claw_read_pages;
1534         __u32   claw_writes_perpage=1;
1535         __u32   claw_write_pages;
1536         void    *p_buff=NULL;
1537         struct ccwbk*p_free_chain;
1538         struct ccwbk*p_buf;
1539         struct ccwbk*p_last_CCWB;
1540         struct ccwbk*p_first_CCWB;
1541         struct endccw *p_endccw=NULL;
1542         addr_t  real_address;
1543         struct claw_privbk *privptr = dev->ml_priv;
1544         struct clawh *pClawH=NULL;
1545         addr_t   real_TIC_address;
1546         int i,j;
1547         CLAW_DBF_TEXT(4, trace, "init_ccw");
1548
1549         /*  initialize  statistics field */
1550         privptr->active_link_ID=0;
1551         /*  initialize  ccwbk pointers  */
1552         privptr->p_write_free_chain=NULL;   /* pointer to free ccw chain*/
1553         privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
1554         privptr->p_write_active_last=NULL;  /* pointer to the last write ccw*/
1555         privptr->p_read_active_first=NULL;  /* pointer to the first read ccw*/
1556         privptr->p_read_active_last=NULL;   /* pointer to the last read ccw */
1557         privptr->p_end_ccw=NULL;            /* pointer to ending ccw        */
1558         privptr->p_claw_signal_blk=NULL;    /* pointer to signal block      */
1559         privptr->buffs_alloc = 0;
1560         memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
1561         memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
1562         /*  initialize  free write ccwbk counter  */
1563         privptr->write_free_count=0;  /* number of free bufs on write chain */
1564         p_last_CCWB = NULL;
1565         p_first_CCWB= NULL;
1566         /*
1567         *  We need 1 CCW block for each read buffer, 1 for each
1568         *  write buffer, plus 1 for ClawSignalBlock
1569         */
1570         ccw_blocks_required =
1571                 privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
1572         /*
1573         * compute number of CCW blocks that will fit in a page
1574         */
1575         ccw_blocks_perpage= PAGE_SIZE /  CCWBK_SIZE;
1576         ccw_pages_required=
1577                 DIV_ROUND_UP(ccw_blocks_required, ccw_blocks_perpage);
1578
1579         /*
1580          *  read and write sizes are set by 2 constants in claw.h
1581          *  4k and 32k.  Unpacked values other than 4k are not going to
1582          * provide good performance. With packing buffers support 32k
1583          * buffers are used.
1584          */
1585         if (privptr->p_env->read_size < PAGE_SIZE) {
1586                 claw_reads_perpage = PAGE_SIZE / privptr->p_env->read_size;
1587                 claw_read_pages = DIV_ROUND_UP(privptr->p_env->read_buffers,
1588                                                 claw_reads_perpage);
1589          }
1590          else {       /* > or equal  */
1591                 privptr->p_buff_pages_perread =
1592                         DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
1593                 claw_read_pages = privptr->p_env->read_buffers *
1594                                         privptr->p_buff_pages_perread;
1595          }
1596         if (privptr->p_env->write_size < PAGE_SIZE) {
1597                 claw_writes_perpage =
1598                         PAGE_SIZE / privptr->p_env->write_size;
1599                 claw_write_pages = DIV_ROUND_UP(privptr->p_env->write_buffers,
1600                                                 claw_writes_perpage);
1601
1602         }
1603         else {      /* >  or equal  */
1604                 privptr->p_buff_pages_perwrite =
1605                         DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
1606                 claw_write_pages = privptr->p_env->write_buffers *
1607                                         privptr->p_buff_pages_perwrite;
1608         }
1609         /*
1610         *               allocate ccw_pages_required
1611         */
1612         if (privptr->p_buff_ccw==NULL) {
1613                 privptr->p_buff_ccw=
1614                         (void *)__get_free_pages(__GFP_DMA,
1615                         (int)pages_to_order_of_mag(ccw_pages_required ));
1616                 if (privptr->p_buff_ccw==NULL) {
1617                         return -ENOMEM;
1618                 }
1619                 privptr->p_buff_ccw_num=ccw_pages_required;
1620         }
1621         memset(privptr->p_buff_ccw, 0x00,
1622                 privptr->p_buff_ccw_num * PAGE_SIZE);
1623
1624         /*
1625         *               obtain ending ccw block address
1626         *
1627         */
1628         privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
1629         real_address  = (__u32)__pa(privptr->p_end_ccw);
1630         /*                              Initialize ending CCW block       */
1631         p_endccw=privptr->p_end_ccw;
1632         p_endccw->real=real_address;
1633         p_endccw->write1=0x00;
1634         p_endccw->read1=0x00;
1635
1636         /*      write1_nop1                                     */
1637         p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1638         p_endccw->write1_nop1.flags       = CCW_FLAG_SLI | CCW_FLAG_CC;
1639         p_endccw->write1_nop1.count       = 1;
1640         p_endccw->write1_nop1.cda         = 0;
1641
1642         /*      write1_nop2                                     */
1643         p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1644         p_endccw->write1_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1645         p_endccw->write1_nop2.count      = 1;
1646         p_endccw->write1_nop2.cda        = 0;
1647
1648         /*      write2_nop1                                     */
1649         p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1650         p_endccw->write2_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
1651         p_endccw->write2_nop1.count        = 1;
1652         p_endccw->write2_nop1.cda          = 0;
1653
1654         /*      write2_nop2                                     */
1655         p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1656         p_endccw->write2_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1657         p_endccw->write2_nop2.count        = 1;
1658         p_endccw->write2_nop2.cda          = 0;
1659
1660         /*      read1_nop1                                      */
1661         p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1662         p_endccw->read1_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
1663         p_endccw->read1_nop1.count        = 1;
1664         p_endccw->read1_nop1.cda          = 0;
1665
1666         /*      read1_nop2                                      */
1667         p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1668         p_endccw->read1_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1669         p_endccw->read1_nop2.count        = 1;
1670         p_endccw->read1_nop2.cda          = 0;
1671
1672         /*      read2_nop1                                      */
1673         p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1674         p_endccw->read2_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
1675         p_endccw->read2_nop1.count        = 1;
1676         p_endccw->read2_nop1.cda          = 0;
1677
1678         /*      read2_nop2                                      */
1679         p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1680         p_endccw->read2_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1681         p_endccw->read2_nop2.count        = 1;
1682         p_endccw->read2_nop2.cda          = 0;
1683
1684         /*
1685         *                               Build a chain of CCWs
1686         *
1687         */
1688         p_buff=privptr->p_buff_ccw;
1689
1690         p_free_chain=NULL;
1691         for (i=0 ; i < ccw_pages_required; i++ ) {
1692                 real_address  = (__u32)__pa(p_buff);
1693                 p_buf=p_buff;
1694                 for (j=0 ; j < ccw_blocks_perpage ; j++) {
1695                         p_buf->next  = p_free_chain;
1696                         p_free_chain = p_buf;
1697                         p_buf->real=(__u32)__pa(p_buf);
1698                         ++p_buf;
1699                 }
1700                 p_buff+=PAGE_SIZE;
1701         }
1702         /*
1703         *                               Initialize ClawSignalBlock
1704         *
1705         */
1706         if (privptr->p_claw_signal_blk==NULL) {
1707                 privptr->p_claw_signal_blk=p_free_chain;
1708                 p_free_chain=p_free_chain->next;
1709                 pClawH=(struct clawh *)privptr->p_claw_signal_blk;
1710                 pClawH->length=0xffff;
1711                 pClawH->opcode=0xff;
1712                 pClawH->flag=CLAW_BUSY;
1713         }
1714
1715         /*
1716         *               allocate write_pages_required and add to free chain
1717         */
1718         if (privptr->p_buff_write==NULL) {
1719             if (privptr->p_env->write_size < PAGE_SIZE) {
1720                 privptr->p_buff_write=
1721                         (void *)__get_free_pages(__GFP_DMA,
1722                         (int)pages_to_order_of_mag(claw_write_pages ));
1723                 if (privptr->p_buff_write==NULL) {
1724                         privptr->p_buff_ccw=NULL;
1725                         return -ENOMEM;
1726                 }
1727                 /*
1728                 *                               Build CLAW write free chain
1729                 *
1730                 */
1731
1732                 memset(privptr->p_buff_write, 0x00,
1733                         ccw_pages_required * PAGE_SIZE);
1734                 privptr->p_write_free_chain=NULL;
1735
1736                 p_buff=privptr->p_buff_write;
1737
1738                 for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
1739                         p_buf        = p_free_chain;      /*  get a CCW */
1740                         p_free_chain = p_buf->next;
1741                         p_buf->next  =privptr->p_write_free_chain;
1742                         privptr->p_write_free_chain = p_buf;
1743                         p_buf-> p_buffer        = (struct clawbuf *)p_buff;
1744                         p_buf-> write.cda       = (__u32)__pa(p_buff);
1745                         p_buf-> write.flags     = CCW_FLAG_SLI | CCW_FLAG_CC;
1746                         p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1747                         p_buf-> w_read_FF.flags   = CCW_FLAG_SLI | CCW_FLAG_CC;
1748                         p_buf-> w_read_FF.count   = 1;
1749                         p_buf-> w_read_FF.cda     =
1750                                 (__u32)__pa(&p_buf-> header.flag);
1751                         p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1752                         p_buf-> w_TIC_1.flags      = 0;
1753                         p_buf-> w_TIC_1.count      = 0;
1754
1755                         if (((unsigned long)p_buff +
1756                                             privptr->p_env->write_size) >=
1757                            ((unsigned long)(p_buff+2*
1758                             (privptr->p_env->write_size) - 1) & PAGE_MASK)) {
1759                                 p_buff = p_buff+privptr->p_env->write_size;
1760                         }
1761                 }
1762            }
1763            else      /*  Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
1764            {
1765                privptr->p_write_free_chain=NULL;
1766                for (i = 0; i< privptr->p_env->write_buffers ; i++) {
1767                    p_buff=(void *)__get_free_pages(__GFP_DMA,
1768                         (int)pages_to_order_of_mag(
1769                         privptr->p_buff_pages_perwrite) );
1770                    if (p_buff==NULL) {
1771                         free_pages((unsigned long)privptr->p_buff_ccw,
1772                               (int)pages_to_order_of_mag(
1773                                         privptr->p_buff_ccw_num));
1774                         privptr->p_buff_ccw=NULL;
1775                         p_buf=privptr->p_buff_write;
1776                         while (p_buf!=NULL) {
1777                                 free_pages((unsigned long)
1778                                         p_buf->p_buffer,
1779                                         (int)pages_to_order_of_mag(
1780                                         privptr->p_buff_pages_perwrite));
1781                                 p_buf=p_buf->next;
1782                         }
1783                         return -ENOMEM;
1784                    }  /* Error on get_pages   */
1785                    memset(p_buff, 0x00, privptr->p_env->write_size );
1786                    p_buf         = p_free_chain;
1787                    p_free_chain  = p_buf->next;
1788                    p_buf->next   = privptr->p_write_free_chain;
1789                    privptr->p_write_free_chain = p_buf;
1790                    privptr->p_buff_write = p_buf;
1791                    p_buf->p_buffer=(struct clawbuf *)p_buff;
1792                    p_buf-> write.cda     = (__u32)__pa(p_buff);
1793                    p_buf-> write.flags   = CCW_FLAG_SLI | CCW_FLAG_CC;
1794                    p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1795                    p_buf-> w_read_FF.flags    = CCW_FLAG_SLI | CCW_FLAG_CC;
1796                    p_buf-> w_read_FF.count    = 1;
1797                    p_buf-> w_read_FF.cda      =
1798                         (__u32)__pa(&p_buf-> header.flag);
1799                    p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1800                    p_buf-> w_TIC_1.flags   = 0;
1801                    p_buf-> w_TIC_1.count   = 0;
1802                }  /* for all write_buffers   */
1803
1804            }    /* else buffers are PAGE_SIZE or bigger */
1805
1806         }
1807         privptr->p_buff_write_num=claw_write_pages;
1808         privptr->write_free_count=privptr->p_env->write_buffers;
1809
1810
1811         /*
1812         *               allocate read_pages_required and chain to free chain
1813         */
1814         if (privptr->p_buff_read==NULL) {
1815             if (privptr->p_env->read_size < PAGE_SIZE)  {
1816                 privptr->p_buff_read=
1817                         (void *)__get_free_pages(__GFP_DMA,
1818                         (int)pages_to_order_of_mag(claw_read_pages) );
1819                 if (privptr->p_buff_read==NULL) {
1820                         free_pages((unsigned long)privptr->p_buff_ccw,
1821                                 (int)pages_to_order_of_mag(
1822                                         privptr->p_buff_ccw_num));
1823                         /* free the write pages size is < page size  */
1824                         free_pages((unsigned long)privptr->p_buff_write,
1825                                 (int)pages_to_order_of_mag(
1826                                 privptr->p_buff_write_num));
1827                         privptr->p_buff_ccw=NULL;
1828                         privptr->p_buff_write=NULL;
1829                         return -ENOMEM;
1830                 }
1831                 memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
1832                 privptr->p_buff_read_num=claw_read_pages;
1833                 /*
1834                 *                               Build CLAW read free chain
1835                 *
1836                 */
1837                 p_buff=privptr->p_buff_read;
1838                 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
1839                         p_buf        = p_free_chain;
1840                         p_free_chain = p_buf->next;
1841
1842                         if (p_last_CCWB==NULL) {
1843                                 p_buf->next=NULL;
1844                                 real_TIC_address=0;
1845                                 p_last_CCWB=p_buf;
1846                         }
1847                         else {
1848                                 p_buf->next=p_first_CCWB;
1849                                 real_TIC_address=
1850                                 (__u32)__pa(&p_first_CCWB -> read );
1851                         }
1852
1853                         p_first_CCWB=p_buf;
1854
1855                         p_buf->p_buffer=(struct clawbuf *)p_buff;
1856                         /*  initialize read command */
1857                         p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
1858                         p_buf-> read.cda = (__u32)__pa(p_buff);
1859                         p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1860                         p_buf-> read.count       = privptr->p_env->read_size;
1861
1862                         /*  initialize read_h command */
1863                         p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
1864                         p_buf-> read_h.cda =
1865                                 (__u32)__pa(&(p_buf->header));
1866                         p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1867                         p_buf-> read_h.count      = sizeof(struct clawh);
1868
1869                         /*  initialize Signal command */
1870                         p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
1871                         p_buf-> signal.cda =
1872                                 (__u32)__pa(&(pClawH->flag));
1873                         p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1874                         p_buf-> signal.count     = 1;
1875
1876                         /*  initialize r_TIC_1 command */
1877                         p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1878                         p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
1879                         p_buf-> r_TIC_1.flags = 0;
1880                         p_buf-> r_TIC_1.count      = 0;
1881
1882                         /*  initialize r_read_FF command */
1883                         p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1884                         p_buf-> r_read_FF.cda =
1885                                 (__u32)__pa(&(pClawH->flag));
1886                         p_buf-> r_read_FF.flags =
1887                                 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
1888                         p_buf-> r_read_FF.count    = 1;
1889
1890                         /*    initialize r_TIC_2          */
1891                         memcpy(&p_buf->r_TIC_2,
1892                                 &p_buf->r_TIC_1, sizeof(struct ccw1));
1893
1894                         /*     initialize Header     */
1895                         p_buf->header.length=0xffff;
1896                         p_buf->header.opcode=0xff;
1897                         p_buf->header.flag=CLAW_PENDING;
1898
1899                         if (((unsigned long)p_buff+privptr->p_env->read_size) >=
1900                           ((unsigned long)(p_buff+2*(privptr->p_env->read_size)
1901                                  -1)
1902                            & PAGE_MASK)) {
1903                                 p_buff= p_buff+privptr->p_env->read_size;
1904                         }
1905                         else {
1906                                 p_buff=
1907                                 (void *)((unsigned long)
1908                                         (p_buff+2*(privptr->p_env->read_size)-1)
1909                                          & PAGE_MASK) ;
1910                         }
1911                 }   /* for read_buffers   */
1912           }         /* read_size < PAGE_SIZE  */
1913           else {  /* read Size >= PAGE_SIZE  */
1914                 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
1915                         p_buff = (void *)__get_free_pages(__GFP_DMA,
1916                                 (int)pages_to_order_of_mag(
1917                                         privptr->p_buff_pages_perread));
1918                         if (p_buff==NULL) {
1919                                 free_pages((unsigned long)privptr->p_buff_ccw,
1920                                         (int)pages_to_order_of_mag(privptr->
1921                                         p_buff_ccw_num));
1922                                 /* free the write pages  */
1923                                 p_buf=privptr->p_buff_write;
1924                                 while (p_buf!=NULL) {
1925                                         free_pages(
1926                                             (unsigned long)p_buf->p_buffer,
1927                                             (int)pages_to_order_of_mag(
1928                                             privptr->p_buff_pages_perwrite));
1929                                         p_buf=p_buf->next;
1930                                 }
1931                                 /* free any read pages already alloc  */
1932                                 p_buf=privptr->p_buff_read;
1933                                 while (p_buf!=NULL) {
1934                                         free_pages(
1935                                             (unsigned long)p_buf->p_buffer,
1936                                             (int)pages_to_order_of_mag(
1937                                              privptr->p_buff_pages_perread));
1938                                         p_buf=p_buf->next;
1939                                 }
1940                                 privptr->p_buff_ccw=NULL;
1941                                 privptr->p_buff_write=NULL;
1942                                 return -ENOMEM;
1943                         }
1944                         memset(p_buff, 0x00, privptr->p_env->read_size);
1945                         p_buf        = p_free_chain;
1946                         privptr->p_buff_read = p_buf;
1947                         p_free_chain = p_buf->next;
1948
1949                         if (p_last_CCWB==NULL) {
1950                                 p_buf->next=NULL;
1951                                 real_TIC_address=0;
1952                                 p_last_CCWB=p_buf;
1953                         }
1954                         else {
1955                                 p_buf->next=p_first_CCWB;
1956                                 real_TIC_address=
1957                                         (addr_t)__pa(
1958                                                 &p_first_CCWB -> read );
1959                         }
1960
1961                         p_first_CCWB=p_buf;
1962                                 /* save buff address */
1963                         p_buf->p_buffer=(struct clawbuf *)p_buff;
1964                         /*  initialize read command */
1965                         p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
1966                         p_buf-> read.cda = (__u32)__pa(p_buff);
1967                         p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1968                         p_buf-> read.count       = privptr->p_env->read_size;
1969
1970                         /*  initialize read_h command */
1971                         p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
1972                         p_buf-> read_h.cda =
1973                                 (__u32)__pa(&(p_buf->header));
1974                         p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1975                         p_buf-> read_h.count      = sizeof(struct clawh);
1976
1977                         /*  initialize Signal command */
1978                         p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
1979                         p_buf-> signal.cda =
1980                                 (__u32)__pa(&(pClawH->flag));
1981                         p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1982                         p_buf-> signal.count     = 1;
1983
1984                         /*  initialize r_TIC_1 command */
1985                         p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1986                         p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
1987                         p_buf-> r_TIC_1.flags = 0;
1988                         p_buf-> r_TIC_1.count      = 0;
1989
1990                         /*  initialize r_read_FF command */
1991                         p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1992                         p_buf-> r_read_FF.cda =
1993                                 (__u32)__pa(&(pClawH->flag));
1994                         p_buf-> r_read_FF.flags =
1995                                 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
1996                         p_buf-> r_read_FF.count    = 1;
1997
1998                         /*    initialize r_TIC_2          */
1999                         memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
2000                                 sizeof(struct ccw1));
2001
2002                         /*     initialize Header     */
2003                         p_buf->header.length=0xffff;
2004                         p_buf->header.opcode=0xff;
2005                         p_buf->header.flag=CLAW_PENDING;
2006
2007                 }    /* For read_buffers   */
2008           }     /*  read_size >= PAGE_SIZE   */
2009         }       /*  pBuffread = NULL */
2010         add_claw_reads( dev  ,p_first_CCWB , p_last_CCWB);
2011         privptr->buffs_alloc = 1;
2012
2013         return 0;
2014 }    /*    end of init_ccw_bk */
2015
2016 /*-------------------------------------------------------------------*
2017 *                                                                    *
2018 *       probe_error                                                  *
2019 *                                                                    *
2020 *--------------------------------------------------------------------*/
2021
2022 static void
2023 probe_error( struct ccwgroup_device *cgdev)
2024 {
2025         struct claw_privbk *privptr;
2026
2027         CLAW_DBF_TEXT(4, trace, "proberr");
2028         privptr = dev_get_drvdata(&cgdev->dev);
2029         if (privptr != NULL) {
2030                 dev_set_drvdata(&cgdev->dev, NULL);
2031                 kfree(privptr->p_env);
2032                 kfree(privptr->p_mtc_envelope);
2033                 kfree(privptr);
2034         }
2035 }    /*    probe_error    */
2036
2037 /*-------------------------------------------------------------------*
2038 *    claw_process_control                                            *
2039 *                                                                    *
2040 *                                                                    *
2041 *--------------------------------------------------------------------*/
2042
2043 static int
2044 claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
2045 {
2046
2047         struct clawbuf *p_buf;
2048         struct clawctl  ctlbk;
2049         struct clawctl *p_ctlbk;
2050         char    temp_host_name[8];
2051         char    temp_ws_name[8];
2052         struct claw_privbk *privptr;
2053         struct claw_env *p_env;
2054         struct sysval *p_sysval;
2055         struct conncmd *p_connect=NULL;
2056         int rc;
2057         struct chbk *p_ch = NULL;
2058         struct device *tdev;
2059         CLAW_DBF_TEXT(2, setup, "clw_cntl");
2060         udelay(1000);  /* Wait a ms for the control packets to
2061                         *catch up to each other */
2062         privptr = dev->ml_priv;
2063         p_env=privptr->p_env;
2064         tdev = &privptr->channel[READ_CHANNEL].cdev->dev;
2065         memcpy( &temp_host_name, p_env->host_name, 8);
2066         memcpy( &temp_ws_name, p_env->adapter_name , 8);
2067         dev_info(tdev, "%s: CLAW device %.8s: "
2068                 "Received Control Packet\n",
2069                 dev->name, temp_ws_name);
2070         if (privptr->release_pend==1) {
2071                 return 0;
2072         }
2073         p_buf=p_ccw->p_buffer;
2074         p_ctlbk=&ctlbk;
2075         if (p_env->packing == DO_PACKED) { /* packing in progress?*/
2076                 memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
2077         } else {
2078                 memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
2079         }
2080         switch (p_ctlbk->command)
2081         {
2082         case SYSTEM_VALIDATE_REQUEST:
2083                 if (p_ctlbk->version != CLAW_VERSION_ID) {
2084                         claw_snd_sys_validate_rsp(dev, p_ctlbk,
2085                                 CLAW_RC_WRONG_VERSION);
2086                         dev_warn(tdev, "The communication peer of %s"
2087                                 " uses an incorrect API version %d\n",
2088                                 dev->name, p_ctlbk->version);
2089                 }
2090                 p_sysval = (struct sysval *)&(p_ctlbk->data);
2091                 dev_info(tdev, "%s: Recv Sys Validate Request: "
2092                         "Vers=%d,link_id=%d,Corr=%d,WS name=%.8s,"
2093                         "Host name=%.8s\n",
2094                         dev->name, p_ctlbk->version,
2095                         p_ctlbk->linkid,
2096                         p_ctlbk->correlator,
2097                         p_sysval->WS_name,
2098                         p_sysval->host_name);
2099                 if (memcmp(temp_host_name, p_sysval->host_name, 8)) {
2100                         claw_snd_sys_validate_rsp(dev, p_ctlbk,
2101                                 CLAW_RC_NAME_MISMATCH);
2102                         CLAW_DBF_TEXT(2, setup, "HSTBAD");
2103                         CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->host_name);
2104                         CLAW_DBF_TEXT_(2, setup, "%s", temp_host_name);
2105                         dev_warn(tdev,
2106                                 "Host name %s for %s does not match the"
2107                                 " remote adapter name %s\n",
2108                                 p_sysval->host_name,
2109                                 dev->name,
2110                                 temp_host_name);
2111                 }
2112                 if (memcmp(temp_ws_name, p_sysval->WS_name, 8)) {
2113                         claw_snd_sys_validate_rsp(dev, p_ctlbk,
2114                                 CLAW_RC_NAME_MISMATCH);
2115                         CLAW_DBF_TEXT(2, setup, "WSNBAD");
2116                         CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->WS_name);
2117                         CLAW_DBF_TEXT_(2, setup, "%s", temp_ws_name);
2118                         dev_warn(tdev, "Adapter name %s for %s does not match"
2119                                 " the remote host name %s\n",
2120                                 p_sysval->WS_name,
2121                                 dev->name,
2122                                 temp_ws_name);
2123                 }
2124                 if ((p_sysval->write_frame_size < p_env->write_size) &&
2125                     (p_env->packing == 0)) {
2126                         claw_snd_sys_validate_rsp(dev, p_ctlbk,
2127                                 CLAW_RC_HOST_RCV_TOO_SMALL);
2128                         dev_warn(tdev,
2129                                 "The local write buffer is smaller than the"
2130                                 " remote read buffer\n");
2131                         CLAW_DBF_TEXT(2, setup, "wrtszbad");
2132                 }
2133                 if ((p_sysval->read_frame_size < p_env->read_size) &&
2134                     (p_env->packing == 0)) {
2135                         claw_snd_sys_validate_rsp(dev, p_ctlbk,
2136                                 CLAW_RC_HOST_RCV_TOO_SMALL);
2137                         dev_warn(tdev,
2138                                 "The local read buffer is smaller than the"
2139                                 " remote write buffer\n");
2140                         CLAW_DBF_TEXT(2, setup, "rdsizbad");
2141                 }
2142                 claw_snd_sys_validate_rsp(dev, p_ctlbk, 0);
2143                 dev_info(tdev,
2144                         "CLAW device %.8s: System validate"
2145                         " completed.\n", temp_ws_name);
2146                 dev_info(tdev,
2147                         "%s: sys Validate Rsize:%d Wsize:%d\n",
2148                         dev->name, p_sysval->read_frame_size,
2149                         p_sysval->write_frame_size);
2150                 privptr->system_validate_comp = 1;
2151                 if (strncmp(p_env->api_type, WS_APPL_NAME_PACKED, 6) == 0)
2152                         p_env->packing = PACKING_ASK;
2153                 claw_strt_conn_req(dev);
2154                 break;
2155         case SYSTEM_VALIDATE_RESPONSE:
2156                 p_sysval = (struct sysval *)&(p_ctlbk->data);
2157                 dev_info(tdev,
2158                         "Settings for %s validated (version=%d, "
2159                         "remote device=%d, rc=%d, adapter name=%.8s, "
2160                         "host name=%.8s)\n",
2161                         dev->name,
2162                         p_ctlbk->version,
2163                         p_ctlbk->correlator,
2164                         p_ctlbk->rc,
2165                         p_sysval->WS_name,
2166                         p_sysval->host_name);
2167                 switch (p_ctlbk->rc) {
2168                 case 0:
2169                         dev_info(tdev, "%s: CLAW device "
2170                                 "%.8s: System validate completed.\n",
2171                                 dev->name, temp_ws_name);
2172                         if (privptr->system_validate_comp == 0)
2173                                 claw_strt_conn_req(dev);
2174                         privptr->system_validate_comp = 1;
2175                         break;
2176                 case CLAW_RC_NAME_MISMATCH:
2177                         dev_warn(tdev, "Validating %s failed because of"
2178                                 " a host or adapter name mismatch\n",
2179                                 dev->name);
2180                         break;
2181                 case CLAW_RC_WRONG_VERSION:
2182                         dev_warn(tdev, "Validating %s failed because of a"
2183                                 " version conflict\n",
2184                                 dev->name);
2185                         break;
2186                 case CLAW_RC_HOST_RCV_TOO_SMALL:
2187                         dev_warn(tdev, "Validating %s failed because of a"
2188                                 " frame size conflict\n",
2189                                 dev->name);
2190                         break;
2191                 default:
2192                         dev_warn(tdev, "The communication peer of %s rejected"
2193                                 " the connection\n",
2194                                  dev->name);
2195                         break;
2196                 }
2197                 break;
2198
2199         case CONNECTION_REQUEST:
2200                 p_connect = (struct conncmd *)&(p_ctlbk->data);
2201                 dev_info(tdev, "%s: Recv Conn Req: Vers=%d,link_id=%d,"
2202                         "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
2203                         dev->name,
2204                         p_ctlbk->version,
2205                         p_ctlbk->linkid,
2206                         p_ctlbk->correlator,
2207                         p_connect->host_name,
2208                         p_connect->WS_name);
2209                 if (privptr->active_link_ID != 0) {
2210                         claw_snd_disc(dev, p_ctlbk);
2211                         dev_info(tdev, "%s rejected a connection request"
2212                                 " because it is already active\n",
2213                                 dev->name);
2214                 }
2215                 if (p_ctlbk->linkid != 1) {
2216                         claw_snd_disc(dev, p_ctlbk);
2217                         dev_info(tdev, "%s rejected a request to open multiple"
2218                                 " connections\n",
2219                                 dev->name);
2220                 }
2221                 rc = find_link(dev, p_connect->host_name, p_connect->WS_name);
2222                 if (rc != 0) {
2223                         claw_snd_disc(dev, p_ctlbk);
2224                         dev_info(tdev, "%s rejected a connection request"
2225                                 " because of a type mismatch\n",
2226                                 dev->name);
2227                 }
2228                 claw_send_control(dev,
2229                         CONNECTION_CONFIRM, p_ctlbk->linkid,
2230                         p_ctlbk->correlator,
2231                         0, p_connect->host_name,
2232                         p_connect->WS_name);
2233                 if (p_env->packing == PACKING_ASK) {
2234                         p_env->packing = PACK_SEND;
2235                         claw_snd_conn_req(dev, 0);
2236                 }
2237                 dev_info(tdev, "%s: CLAW device %.8s: Connection "
2238                         "completed link_id=%d.\n",
2239                         dev->name, temp_ws_name,
2240                         p_ctlbk->linkid);
2241                         privptr->active_link_ID = p_ctlbk->linkid;
2242                         p_ch = &privptr->channel[WRITE_CHANNEL];
2243                         wake_up(&p_ch->wait);  /* wake up claw_open ( WRITE) */
2244                 break;
2245         case CONNECTION_RESPONSE:
2246                 p_connect = (struct conncmd *)&(p_ctlbk->data);
2247                 dev_info(tdev, "%s: Recv Conn Resp: Vers=%d,link_id=%d,"
2248                         "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
2249                         dev->name,
2250                         p_ctlbk->version,
2251                         p_ctlbk->linkid,
2252                         p_ctlbk->correlator,
2253                         p_ctlbk->rc,
2254                         p_connect->host_name,
2255                         p_connect->WS_name);
2256
2257                 if (p_ctlbk->rc != 0) {
2258                         dev_warn(tdev, "The communication peer of %s rejected"
2259                                 " a connection request\n",
2260                                 dev->name);
2261                         return 1;
2262                 }
2263                 rc = find_link(dev,
2264                         p_connect->host_name, p_connect->WS_name);
2265                 if (rc != 0) {
2266                         claw_snd_disc(dev, p_ctlbk);
2267                         dev_warn(tdev, "The communication peer of %s"
2268                                 " rejected a connection "
2269                                 "request because of a type mismatch\n",
2270                                  dev->name);
2271                 }
2272                 /* should be until CONNECTION_CONFIRM */
2273                 privptr->active_link_ID = -(p_ctlbk->linkid);
2274                 break;
2275         case CONNECTION_CONFIRM:
2276                 p_connect = (struct conncmd *)&(p_ctlbk->data);
2277                 dev_info(tdev,
2278                         "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
2279                         "Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
2280                         dev->name,
2281                         p_ctlbk->version,
2282                         p_ctlbk->linkid,
2283                         p_ctlbk->correlator,
2284                         p_connect->host_name,
2285                         p_connect->WS_name);
2286                 if (p_ctlbk->linkid == -(privptr->active_link_ID)) {
2287                         privptr->active_link_ID = p_ctlbk->linkid;
2288                         if (p_env->packing > PACKING_ASK) {
2289                                 dev_info(tdev,
2290                                 "%s: Confirmed Now packing\n", dev->name);
2291                                 p_env->packing = DO_PACKED;
2292                         }
2293                         p_ch = &privptr->channel[WRITE_CHANNEL];
2294                         wake_up(&p_ch->wait);
2295                 } else {
2296                         dev_warn(tdev, "Activating %s failed because of"
2297                                 " an incorrect link ID=%d\n",
2298                                 dev->name, p_ctlbk->linkid);
2299                         claw_snd_disc(dev, p_ctlbk);
2300                 }
2301                 break;
2302         case DISCONNECT:
2303                 dev_info(tdev, "%s: Disconnect: "
2304                         "Vers=%d,link_id=%d,Corr=%d\n",
2305                         dev->name, p_ctlbk->version,
2306                         p_ctlbk->linkid, p_ctlbk->correlator);
2307                 if ((p_ctlbk->linkid == 2) &&
2308                     (p_env->packing == PACK_SEND)) {
2309                         privptr->active_link_ID = 1;
2310                         p_env->packing = DO_PACKED;
2311                 } else
2312                         privptr->active_link_ID = 0;
2313                 break;
2314         case CLAW_ERROR:
2315                 dev_warn(tdev, "The communication peer of %s failed\n",
2316                         dev->name);
2317                 break;
2318         default:
2319                 dev_warn(tdev, "The communication peer of %s sent"
2320                         " an unknown command code\n",
2321                         dev->name);
2322                 break;
2323         }
2324
2325         return 0;
2326 }   /*    end of claw_process_control    */
2327
2328
2329 /*-------------------------------------------------------------------*
2330 *               claw_send_control                                    *
2331 *                                                                    *
2332 *--------------------------------------------------------------------*/
2333
2334 static int
2335 claw_send_control(struct net_device *dev, __u8 type, __u8 link,
2336          __u8 correlator, __u8 rc, char *local_name, char *remote_name)
2337 {
2338         struct claw_privbk              *privptr;
2339         struct clawctl                  *p_ctl;
2340         struct sysval                   *p_sysval;
2341         struct conncmd                  *p_connect;
2342         struct sk_buff                  *skb;
2343
2344         CLAW_DBF_TEXT(2, setup, "sndcntl");
2345         privptr = dev->ml_priv;
2346         p_ctl=(struct clawctl *)&privptr->ctl_bk;
2347
2348         p_ctl->command=type;
2349         p_ctl->version=CLAW_VERSION_ID;
2350         p_ctl->linkid=link;
2351         p_ctl->correlator=correlator;
2352         p_ctl->rc=rc;
2353
2354         p_sysval=(struct sysval *)&p_ctl->data;
2355         p_connect=(struct conncmd *)&p_ctl->data;
2356
2357         switch (p_ctl->command) {
2358                 case SYSTEM_VALIDATE_REQUEST:
2359                 case SYSTEM_VALIDATE_RESPONSE:
2360                         memcpy(&p_sysval->host_name, local_name, 8);
2361                         memcpy(&p_sysval->WS_name, remote_name, 8);
2362                         if (privptr->p_env->packing > 0) {
2363                                 p_sysval->read_frame_size = DEF_PACK_BUFSIZE;
2364                                 p_sysval->write_frame_size = DEF_PACK_BUFSIZE;
2365                         } else {
2366                                 /* how big is the biggest group of packets */
2367                            p_sysval->read_frame_size =
2368                                 privptr->p_env->read_size;
2369                            p_sysval->write_frame_size =
2370                                 privptr->p_env->write_size;
2371                         }
2372                         memset(&p_sysval->reserved, 0x00, 4);
2373                         break;
2374                 case CONNECTION_REQUEST:
2375                 case CONNECTION_RESPONSE:
2376                 case CONNECTION_CONFIRM:
2377                 case DISCONNECT:
2378                         memcpy(&p_sysval->host_name, local_name, 8);
2379                         memcpy(&p_sysval->WS_name, remote_name, 8);
2380                         if (privptr->p_env->packing > 0) {
2381                         /* How big is the biggest packet */
2382                                 p_connect->reserved1[0]=CLAW_FRAME_SIZE;
2383                                 p_connect->reserved1[1]=CLAW_FRAME_SIZE;
2384                         } else {
2385                                 memset(&p_connect->reserved1, 0x00, 4);
2386                                 memset(&p_connect->reserved2, 0x00, 4);
2387                         }
2388                         break;
2389                 default:
2390                         break;
2391         }
2392
2393         /*      write Control Record to the device                   */
2394
2395
2396         skb = dev_alloc_skb(sizeof(struct clawctl));
2397         if (!skb) {
2398                 return -ENOMEM;
2399         }
2400         memcpy(skb_put(skb, sizeof(struct clawctl)),
2401                 p_ctl, sizeof(struct clawctl));
2402         if (privptr->p_env->packing >= PACK_SEND)
2403                 claw_hw_tx(skb, dev, 1);
2404         else
2405                 claw_hw_tx(skb, dev, 0);
2406         return 0;
2407 }  /*   end of claw_send_control  */
2408
2409 /*-------------------------------------------------------------------*
2410 *               claw_snd_conn_req                                    *
2411 *                                                                    *
2412 *--------------------------------------------------------------------*/
2413 static int
2414 claw_snd_conn_req(struct net_device *dev, __u8 link)
2415 {
2416         int                rc;
2417         struct claw_privbk *privptr = dev->ml_priv;
2418         struct clawctl     *p_ctl;
2419
2420         CLAW_DBF_TEXT(2, setup, "snd_conn");
2421         rc = 1;
2422         p_ctl=(struct clawctl *)&privptr->ctl_bk;
2423         p_ctl->linkid = link;
2424         if ( privptr->system_validate_comp==0x00 ) {
2425                 return rc;
2426         }
2427         if (privptr->p_env->packing == PACKING_ASK )
2428                 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2429                         WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
2430         if (privptr->p_env->packing == PACK_SEND)  {
2431                 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2432                         WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
2433         }
2434         if (privptr->p_env->packing == 0)
2435                 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2436                         HOST_APPL_NAME, privptr->p_env->api_type);
2437         return rc;
2438
2439 }  /*  end of claw_snd_conn_req */
2440
2441
2442 /*-------------------------------------------------------------------*
2443 *               claw_snd_disc                                        *
2444 *                                                                    *
2445 *--------------------------------------------------------------------*/
2446
2447 static int
2448 claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
2449 {
2450         int rc;
2451         struct conncmd *  p_connect;
2452
2453         CLAW_DBF_TEXT(2, setup, "snd_dsc");
2454         p_connect=(struct conncmd *)&p_ctl->data;
2455
2456         rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
2457                 p_ctl->correlator, 0,
2458                 p_connect->host_name, p_connect->WS_name);
2459         return rc;
2460 }     /*   end of claw_snd_disc    */
2461
2462
2463 /*-------------------------------------------------------------------*
2464 *               claw_snd_sys_validate_rsp                            *
2465 *                                                                    *
2466 *--------------------------------------------------------------------*/
2467
2468 static int
2469 claw_snd_sys_validate_rsp(struct net_device *dev,
2470         struct clawctl *p_ctl, __u32 return_code)
2471 {
2472         struct claw_env *  p_env;
2473         struct claw_privbk *privptr;
2474         int    rc;
2475
2476         CLAW_DBF_TEXT(2, setup, "chkresp");
2477         privptr = dev->ml_priv;
2478         p_env=privptr->p_env;
2479         rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
2480                 p_ctl->linkid,
2481                 p_ctl->correlator,
2482                 return_code,
2483                 p_env->host_name,
2484                 p_env->adapter_name  );
2485         return rc;
2486 }     /*    end of claw_snd_sys_validate_rsp    */
2487
2488 /*-------------------------------------------------------------------*
2489 *               claw_strt_conn_req                                   *
2490 *                                                                    *
2491 *--------------------------------------------------------------------*/
2492
2493 static int
2494 claw_strt_conn_req(struct net_device *dev )
2495 {
2496         int rc;
2497
2498         CLAW_DBF_TEXT(2, setup, "conn_req");
2499         rc=claw_snd_conn_req(dev, 1);
2500         return rc;
2501 }    /*   end of claw_strt_conn_req   */
2502
2503
2504
2505 /*-------------------------------------------------------------------*
2506  *   claw_stats                                                      *
2507  *-------------------------------------------------------------------*/
2508
2509 static struct
2510 net_device_stats *claw_stats(struct net_device *dev)
2511 {
2512         struct claw_privbk *privptr;
2513
2514         CLAW_DBF_TEXT(4, trace, "stats");
2515         privptr = dev->ml_priv;
2516         return &privptr->stats;
2517 }     /*   end of claw_stats   */
2518
2519
2520 /*-------------------------------------------------------------------*
2521 *       unpack_read                                                  *
2522 *                                                                    *
2523 *--------------------------------------------------------------------*/
2524 static void
2525 unpack_read(struct net_device *dev )
2526 {
2527         struct sk_buff *skb;
2528         struct claw_privbk *privptr;
2529         struct claw_env    *p_env;
2530         struct ccwbk    *p_this_ccw;
2531         struct ccwbk    *p_first_ccw;
2532         struct ccwbk    *p_last_ccw;
2533         struct clawph   *p_packh;
2534         void            *p_packd;
2535         struct clawctl  *p_ctlrec=NULL;
2536         struct device   *p_dev;
2537
2538         __u32   len_of_data;
2539         __u32   pack_off;
2540         __u8    link_num;
2541         __u8    mtc_this_frm=0;
2542         __u32   bytes_to_mov;
2543         int     i=0;
2544         int     p=0;
2545
2546         CLAW_DBF_TEXT(4, trace, "unpkread");
2547         p_first_ccw=NULL;
2548         p_last_ccw=NULL;
2549         p_packh=NULL;
2550         p_packd=NULL;
2551         privptr = dev->ml_priv;
2552
2553         p_dev = &privptr->channel[READ_CHANNEL].cdev->dev;
2554         p_env = privptr->p_env;
2555         p_this_ccw=privptr->p_read_active_first;
2556         while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
2557                 pack_off = 0;
2558                 p = 0;
2559                 p_this_ccw->header.flag=CLAW_PENDING;
2560                 privptr->p_read_active_first=p_this_ccw->next;
2561                 p_this_ccw->next=NULL;
2562                 p_packh = (struct clawph *)p_this_ccw->p_buffer;
2563                 if ((p_env->packing == PACK_SEND) &&
2564                     (p_packh->len == 32)           &&
2565                     (p_packh->link_num == 0)) {   /* is it a packed ctl rec? */
2566                         p_packh++;  /* peek past pack header */
2567                         p_ctlrec = (struct clawctl *)p_packh;
2568                         p_packh--;  /* un peek */
2569                         if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
2570                             (p_ctlrec->command == CONNECTION_CONFIRM))
2571                                 p_env->packing = DO_PACKED;
2572                 }
2573                 if (p_env->packing == DO_PACKED)
2574                         link_num=p_packh->link_num;
2575                 else
2576                         link_num=p_this_ccw->header.opcode / 8;
2577                 if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
2578                         mtc_this_frm=1;
2579                         if (p_this_ccw->header.length!=
2580                                 privptr->p_env->read_size ) {
2581                                 dev_warn(p_dev,
2582                                         "The communication peer of %s"
2583                                         " sent a faulty"
2584                                         " frame of length %02x\n",
2585                                         dev->name, p_this_ccw->header.length);
2586                         }
2587                 }
2588
2589                 if (privptr->mtc_skipping) {
2590                         /*
2591                         *   We're in the mode of skipping past a
2592                         *   multi-frame message
2593                         *   that we can't process for some reason or other.
2594                         *   The first frame without the More-To-Come flag is
2595                         *   the last frame of the skipped message.
2596                         */
2597                         /*  in case of More-To-Come not set in this frame */
2598                         if (mtc_this_frm==0) {
2599                                 privptr->mtc_skipping=0; /* Ok, the end */
2600                                 privptr->mtc_logical_link=-1;
2601                         }
2602                         goto NextFrame;
2603                 }
2604
2605                 if (link_num==0) {
2606                         claw_process_control(dev, p_this_ccw);
2607                         CLAW_DBF_TEXT(4, trace, "UnpkCntl");
2608                         goto NextFrame;
2609                 }
2610 unpack_next:
2611                 if (p_env->packing == DO_PACKED) {
2612                         if (pack_off > p_env->read_size)
2613                                 goto NextFrame;
2614                         p_packd = p_this_ccw->p_buffer+pack_off;
2615                         p_packh = (struct clawph *) p_packd;
2616                         if ((p_packh->len == 0) || /* done with this frame? */
2617                             (p_packh->flag != 0))
2618                                 goto NextFrame;
2619                         bytes_to_mov = p_packh->len;
2620                         pack_off += bytes_to_mov+sizeof(struct clawph);
2621                         p++;
2622                 } else {
2623                         bytes_to_mov=p_this_ccw->header.length;
2624                 }
2625                 if (privptr->mtc_logical_link<0) {
2626
2627                 /*
2628                 *  if More-To-Come is set in this frame then we don't know
2629                 *  length of entire message, and hence have to allocate
2630                 *  large buffer   */
2631
2632                 /*      We are starting a new envelope  */
2633                 privptr->mtc_offset=0;
2634                         privptr->mtc_logical_link=link_num;
2635                 }
2636
2637                 if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
2638                         /*      error     */
2639                         privptr->stats.rx_frame_errors++;
2640                         goto NextFrame;
2641                 }
2642                 if (p_env->packing == DO_PACKED) {
2643                         memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
2644                                 p_packd+sizeof(struct clawph), bytes_to_mov);
2645
2646                 } else  {
2647                         memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
2648                                 p_this_ccw->p_buffer, bytes_to_mov);
2649                 }
2650                 if (mtc_this_frm==0) {
2651                         len_of_data=privptr->mtc_offset+bytes_to_mov;
2652                         skb=dev_alloc_skb(len_of_data);
2653                         if (skb) {
2654                                 memcpy(skb_put(skb,len_of_data),
2655                                         privptr->p_mtc_envelope,
2656                                         len_of_data);
2657                                 skb->dev=dev;
2658                                 skb_reset_mac_header(skb);
2659                                 skb->protocol=htons(ETH_P_IP);
2660                                 skb->ip_summed=CHECKSUM_UNNECESSARY;
2661                                 privptr->stats.rx_packets++;
2662                                 privptr->stats.rx_bytes+=len_of_data;
2663                                 netif_rx(skb);
2664                         }
2665                         else {
2666                                 dev_info(p_dev, "Allocating a buffer for"
2667                                         " incoming data failed\n");
2668                                 privptr->stats.rx_dropped++;
2669                         }
2670                         privptr->mtc_offset=0;
2671                         privptr->mtc_logical_link=-1;
2672                 }
2673                 else {
2674                         privptr->mtc_offset+=bytes_to_mov;
2675                 }
2676                 if (p_env->packing == DO_PACKED)
2677                         goto unpack_next;
2678 NextFrame:
2679                 /*
2680                 *   Remove ThisCCWblock from active read queue, and add it
2681                 *   to queue of free blocks to be reused.
2682                 */
2683                 i++;
2684                 p_this_ccw->header.length=0xffff;
2685                 p_this_ccw->header.opcode=0xff;
2686                 /*
2687                 *       add this one to the free queue for later reuse
2688                 */
2689                 if (p_first_ccw==NULL) {
2690                         p_first_ccw = p_this_ccw;
2691                 }
2692                 else {
2693                         p_last_ccw->next = p_this_ccw;
2694                 }
2695                 p_last_ccw = p_this_ccw;
2696                 /*
2697                 *       chain to next block on active read queue
2698                 */
2699                 p_this_ccw = privptr->p_read_active_first;
2700                 CLAW_DBF_TEXT_(4, trace, "rxpkt %d", p);
2701         } /* end of while */
2702
2703         /*      check validity                  */
2704
2705         CLAW_DBF_TEXT_(4, trace, "rxfrm %d", i);
2706         add_claw_reads(dev, p_first_ccw, p_last_ccw);
2707         claw_strt_read(dev, LOCK_YES);
2708         return;
2709 }     /*  end of unpack_read   */
2710
2711 /*-------------------------------------------------------------------*
2712 *       claw_strt_read                                               *
2713 *                                                                    *
2714 *--------------------------------------------------------------------*/
2715 static void
2716 claw_strt_read (struct net_device *dev, int lock )
2717 {
2718         int        rc = 0;
2719         __u32      parm;
2720         unsigned long  saveflags = 0;
2721         struct claw_privbk *privptr = dev->ml_priv;
2722         struct ccwbk*p_ccwbk;
2723         struct chbk *p_ch;
2724         struct clawh *p_clawh;
2725         p_ch = &privptr->channel[READ_CHANNEL];
2726
2727         CLAW_DBF_TEXT(4, trace, "StRdNter");
2728         p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
2729         p_clawh->flag=CLAW_IDLE;    /* 0x00 */
2730
2731         if ((privptr->p_write_active_first!=NULL &&
2732              privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
2733             (privptr->p_read_active_first!=NULL &&
2734              privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
2735                 p_clawh->flag=CLAW_BUSY;    /* 0xff */
2736         }
2737         if (lock==LOCK_YES) {
2738                 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
2739         }
2740         if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
2741                 CLAW_DBF_TEXT(4, trace, "HotRead");
2742                 p_ccwbk=privptr->p_read_active_first;
2743                 parm = (unsigned long) p_ch;
2744                 rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
2745                                        0xff, 0);
2746                 if (rc != 0) {
2747                         ccw_check_return_code(p_ch->cdev, rc);
2748                 }
2749         }
2750         else {
2751                 CLAW_DBF_TEXT(2, trace, "ReadAct");
2752         }
2753
2754         if (lock==LOCK_YES) {
2755                 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
2756         }
2757         CLAW_DBF_TEXT(4, trace, "StRdExit");
2758         return;
2759 }       /*    end of claw_strt_read    */
2760
2761 /*-------------------------------------------------------------------*
2762 *       claw_strt_out_IO                                             *
2763 *                                                                    *
2764 *--------------------------------------------------------------------*/
2765
2766 static void
2767 claw_strt_out_IO( struct net_device *dev )
2768 {
2769         int                     rc = 0;
2770         unsigned long           parm;
2771         struct claw_privbk      *privptr;
2772         struct chbk             *p_ch;
2773         struct ccwbk    *p_first_ccw;
2774
2775         if (!dev) {
2776                 return;
2777         }
2778         privptr = (struct claw_privbk *)dev->ml_priv;
2779         p_ch = &privptr->channel[WRITE_CHANNEL];
2780
2781         CLAW_DBF_TEXT(4, trace, "strt_io");
2782         p_first_ccw=privptr->p_write_active_first;
2783
2784         if (p_ch->claw_state == CLAW_STOP)
2785                 return;
2786         if (p_first_ccw == NULL) {
2787                 return;
2788         }
2789         if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
2790                 parm = (unsigned long) p_ch;
2791                 CLAW_DBF_TEXT(2, trace, "StWrtIO");
2792                 rc = ccw_device_start(p_ch->cdev, &p_first_ccw->write, parm,
2793                                       0xff, 0);
2794                 if (rc != 0) {
2795                         ccw_check_return_code(p_ch->cdev, rc);
2796                 }
2797         }
2798         dev->trans_start = jiffies;
2799         return;
2800 }       /*    end of claw_strt_out_IO    */
2801
2802 /*-------------------------------------------------------------------*
2803 *       Free write buffers                                           *
2804 *                                                                    *
2805 *--------------------------------------------------------------------*/
2806
2807 static void
2808 claw_free_wrt_buf( struct net_device *dev )
2809 {
2810
2811         struct claw_privbk *privptr = (struct claw_privbk *)dev->ml_priv;
2812         struct ccwbk*p_this_ccw;
2813         struct ccwbk*p_next_ccw;
2814
2815         CLAW_DBF_TEXT(4, trace, "freewrtb");
2816         /*  scan the write queue to free any completed write packets   */
2817         p_this_ccw=privptr->p_write_active_first;
2818         while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
2819         {
2820                 p_next_ccw = p_this_ccw->next;
2821                 if (((p_next_ccw!=NULL) &&
2822                      (p_next_ccw->header.flag!=CLAW_PENDING)) ||
2823                     ((p_this_ccw == privptr->p_write_active_last) &&
2824                      (p_this_ccw->header.flag!=CLAW_PENDING))) {
2825                         /* The next CCW is OK or this is  */
2826                         /* the last CCW...free it   @A1A  */
2827                         privptr->p_write_active_first=p_this_ccw->next;
2828                         p_this_ccw->header.flag=CLAW_PENDING;
2829                         p_this_ccw->next=privptr->p_write_free_chain;
2830                         privptr->p_write_free_chain=p_this_ccw;
2831                         ++privptr->write_free_count;
2832                         privptr->stats.tx_bytes+= p_this_ccw->write.count;
2833                         p_this_ccw=privptr->p_write_active_first;
2834                         privptr->stats.tx_packets++;
2835                 }
2836                 else {
2837                         break;
2838                 }
2839         }
2840         if (privptr->write_free_count!=0) {
2841                 claw_clearbit_busy(TB_NOBUFFER,dev);
2842         }
2843         /*   whole chain removed?   */
2844         if (privptr->p_write_active_first==NULL) {
2845                 privptr->p_write_active_last=NULL;
2846         }
2847         CLAW_DBF_TEXT_(4, trace, "FWC=%d", privptr->write_free_count);
2848         return;
2849 }
2850
2851 /*-------------------------------------------------------------------*
2852 *       claw free netdevice                                          *
2853 *                                                                    *
2854 *--------------------------------------------------------------------*/
2855 static void
2856 claw_free_netdevice(struct net_device * dev, int free_dev)
2857 {
2858         struct claw_privbk *privptr;
2859
2860         CLAW_DBF_TEXT(2, setup, "free_dev");
2861         if (!dev)
2862                 return;
2863         CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
2864         privptr = dev->ml_priv;
2865         if (dev->flags & IFF_RUNNING)
2866                 claw_release(dev);
2867         if (privptr) {
2868                 privptr->channel[READ_CHANNEL].ndev = NULL;  /* say it's free */
2869         }
2870         dev->ml_priv = NULL;
2871 #ifdef MODULE
2872         if (free_dev) {
2873                 free_netdev(dev);
2874         }
2875 #endif
2876         CLAW_DBF_TEXT(2, setup, "free_ok");
2877 }
2878
2879 /**
2880  * Claw init netdevice
2881  * Initialize everything of the net device except the name and the
2882  * channel structs.
2883  */
2884 static const struct net_device_ops claw_netdev_ops = {
2885         .ndo_open               = claw_open,
2886         .ndo_stop               = claw_release,
2887         .ndo_get_stats          = claw_stats,
2888         .ndo_start_xmit         = claw_tx,
2889         .ndo_change_mtu         = claw_change_mtu,
2890 };
2891
2892 static void
2893 claw_init_netdevice(struct net_device * dev)
2894 {
2895         CLAW_DBF_TEXT(2, setup, "init_dev");
2896         CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
2897         dev->mtu = CLAW_DEFAULT_MTU_SIZE;
2898         dev->hard_header_len = 0;
2899         dev->addr_len = 0;
2900         dev->type = ARPHRD_SLIP;
2901         dev->tx_queue_len = 1300;
2902         dev->flags = IFF_POINTOPOINT | IFF_NOARP;
2903         dev->netdev_ops = &claw_netdev_ops;
2904         CLAW_DBF_TEXT(2, setup, "initok");
2905         return;
2906 }
2907
2908 /**
2909  * Init a new channel in the privptr->channel[i].
2910  *
2911  * @param cdev  The ccw_device to be added.
2912  *
2913  * @return 0 on success, !0 on error.
2914  */
2915 static int
2916 add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
2917 {
2918         struct chbk *p_ch;
2919         struct ccw_dev_id dev_id;
2920
2921         CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cdev->dev));
2922         privptr->channel[i].flag  = i+1;   /* Read is 1 Write is 2 */
2923         p_ch = &privptr->channel[i];
2924         p_ch->cdev = cdev;
2925         snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", dev_name(&cdev->dev));
2926         ccw_device_get_id(cdev, &dev_id);
2927         p_ch->devno = dev_id.devno;
2928         if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
2929                 return -ENOMEM;
2930         }
2931         return 0;
2932 }
2933
2934
2935 /**
2936  *
2937  * Setup an interface.
2938  *
2939  * @param cgdev  Device to be setup.
2940  *
2941  * @returns 0 on success, !0 on failure.
2942  */
2943 static int
2944 claw_new_device(struct ccwgroup_device *cgdev)
2945 {
2946         struct claw_privbk *privptr;
2947         struct claw_env *p_env;
2948         struct net_device *dev;
2949         int ret;
2950         struct ccw_dev_id dev_id;
2951
2952         dev_info(&cgdev->dev, "add for %s\n",
2953                  dev_name(&cgdev->cdev[READ_CHANNEL]->dev));
2954         CLAW_DBF_TEXT(2, setup, "new_dev");
2955         privptr = dev_get_drvdata(&cgdev->dev);
2956         dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, privptr);
2957         dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, privptr);
2958         if (!privptr)
2959                 return -ENODEV;
2960         p_env = privptr->p_env;
2961         ccw_device_get_id(cgdev->cdev[READ_CHANNEL], &dev_id);
2962         p_env->devno[READ_CHANNEL] = dev_id.devno;
2963         ccw_device_get_id(cgdev->cdev[WRITE_CHANNEL], &dev_id);
2964         p_env->devno[WRITE_CHANNEL] = dev_id.devno;
2965         ret = add_channel(cgdev->cdev[0],0,privptr);
2966         if (ret == 0)
2967                 ret = add_channel(cgdev->cdev[1],1,privptr);
2968         if (ret != 0) {
2969                 dev_warn(&cgdev->dev, "Creating a CLAW group device"
2970                         " failed with error code %d\n", ret);
2971                 goto out;
2972         }
2973         ret = ccw_device_set_online(cgdev->cdev[READ_CHANNEL]);
2974         if (ret != 0) {
2975                 dev_warn(&cgdev->dev,
2976                         "Setting the read subchannel online"
2977                         " failed with error code %d\n", ret);
2978                 goto out;
2979         }
2980         ret = ccw_device_set_online(cgdev->cdev[WRITE_CHANNEL]);
2981         if (ret != 0) {
2982                 dev_warn(&cgdev->dev,
2983                         "Setting the write subchannel online "
2984                         "failed with error code %d\n", ret);
2985                 goto out;
2986         }
2987         dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
2988         if (!dev) {
2989                 dev_warn(&cgdev->dev,
2990                         "Activating the CLAW device failed\n");
2991                 goto out;
2992         }
2993         dev->ml_priv = privptr;
2994         dev_set_drvdata(&cgdev->dev, privptr);
2995         dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, privptr);
2996         dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, privptr);
2997         /* sysfs magic */
2998         SET_NETDEV_DEV(dev, &cgdev->dev);
2999         if (register_netdev(dev) != 0) {
3000                 claw_free_netdevice(dev, 1);
3001                 CLAW_DBF_TEXT(2, trace, "regfail");
3002                 goto out;
3003         }
3004         dev->flags &=~IFF_RUNNING;
3005         if (privptr->buffs_alloc == 0) {
3006                 ret=init_ccw_bk(dev);
3007                 if (ret !=0) {
3008                         unregister_netdev(dev);
3009                         claw_free_netdevice(dev,1);
3010                         CLAW_DBF_TEXT(2, trace, "ccwmem");
3011                         goto out;
3012                 }
3013         }
3014         privptr->channel[READ_CHANNEL].ndev = dev;
3015         privptr->channel[WRITE_CHANNEL].ndev = dev;
3016         privptr->p_env->ndev = dev;
3017
3018         dev_info(&cgdev->dev, "%s:readsize=%d  writesize=%d "
3019                 "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
3020                 dev->name, p_env->read_size,
3021                 p_env->write_size, p_env->read_buffers,
3022                 p_env->write_buffers, p_env->devno[READ_CHANNEL],
3023                 p_env->devno[WRITE_CHANNEL]);
3024         dev_info(&cgdev->dev, "%s:host_name:%.8s, adapter_name "
3025                 ":%.8s api_type: %.8s\n",
3026                 dev->name, p_env->host_name,
3027                 p_env->adapter_name , p_env->api_type);
3028         return 0;
3029 out:
3030         ccw_device_set_offline(cgdev->cdev[1]);
3031         ccw_device_set_offline(cgdev->cdev[0]);
3032         return -ENODEV;
3033 }
3034
3035 static void
3036 claw_purge_skb_queue(struct sk_buff_head *q)
3037 {
3038         struct sk_buff *skb;
3039
3040         CLAW_DBF_TEXT(4, trace, "purgque");
3041         while ((skb = skb_dequeue(q))) {
3042                 atomic_dec(&skb->users);
3043                 dev_kfree_skb_any(skb);
3044         }
3045 }
3046
3047 /**
3048  * Shutdown an interface.
3049  *
3050  * @param cgdev  Device to be shut down.
3051  *
3052  * @returns 0 on success, !0 on failure.
3053  */
3054 static int
3055 claw_shutdown_device(struct ccwgroup_device *cgdev)
3056 {
3057         struct claw_privbk *priv;
3058         struct net_device *ndev;
3059         int ret = 0;
3060
3061         CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
3062         priv = dev_get_drvdata(&cgdev->dev);
3063         if (!priv)
3064                 return -ENODEV;
3065         ndev = priv->channel[READ_CHANNEL].ndev;
3066         if (ndev) {
3067                 /* Close the device */
3068                 dev_info(&cgdev->dev, "%s: shutting down\n",
3069                         ndev->name);
3070                 if (ndev->flags & IFF_RUNNING)
3071                         ret = claw_release(ndev);
3072                 ndev->flags &=~IFF_RUNNING;
3073                 unregister_netdev(ndev);
3074                 ndev->ml_priv = NULL;  /* cgdev data, not ndev's to free */
3075                 claw_free_netdevice(ndev, 1);
3076                 priv->channel[READ_CHANNEL].ndev = NULL;
3077                 priv->channel[WRITE_CHANNEL].ndev = NULL;
3078                 priv->p_env->ndev = NULL;
3079         }
3080         ccw_device_set_offline(cgdev->cdev[1]);
3081         ccw_device_set_offline(cgdev->cdev[0]);
3082         return ret;
3083 }
3084
3085 static void
3086 claw_remove_device(struct ccwgroup_device *cgdev)
3087 {
3088         struct claw_privbk *priv;
3089
3090         BUG_ON(!cgdev);
3091         CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
3092         priv = dev_get_drvdata(&cgdev->dev);
3093         BUG_ON(!priv);
3094         dev_info(&cgdev->dev, " will be removed.\n");
3095         if (cgdev->state == CCWGROUP_ONLINE)
3096                 claw_shutdown_device(cgdev);
3097         claw_remove_files(&cgdev->dev);
3098         kfree(priv->p_mtc_envelope);
3099         priv->p_mtc_envelope=NULL;
3100         kfree(priv->p_env);
3101         priv->p_env=NULL;
3102         kfree(priv->channel[0].irb);
3103         priv->channel[0].irb=NULL;
3104         kfree(priv->channel[1].irb);
3105         priv->channel[1].irb=NULL;
3106         kfree(priv);
3107         dev_set_drvdata(&cgdev->dev, NULL);
3108         dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, NULL);
3109         dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, NULL);
3110         put_device(&cgdev->dev);
3111
3112         return;
3113 }
3114
3115
3116 /*
3117  * sysfs attributes
3118  */
3119 static ssize_t
3120 claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
3121 {
3122         struct claw_privbk *priv;
3123         struct claw_env *  p_env;
3124
3125         priv = dev_get_drvdata(dev);
3126         if (!priv)
3127                 return -ENODEV;
3128         p_env = priv->p_env;
3129         return sprintf(buf, "%s\n",p_env->host_name);
3130 }
3131
3132 static ssize_t
3133 claw_hname_write(struct device *dev, struct device_attribute *attr,
3134          const char *buf, size_t count)
3135 {
3136         struct claw_privbk *priv;
3137         struct claw_env *  p_env;
3138
3139         priv = dev_get_drvdata(dev);
3140         if (!priv)
3141                 return -ENODEV;
3142         p_env = priv->p_env;
3143         if (count > MAX_NAME_LEN+1)
3144                 return -EINVAL;
3145         memset(p_env->host_name, 0x20, MAX_NAME_LEN);
3146         strncpy(p_env->host_name,buf, count);
3147         p_env->host_name[count-1] = 0x20;  /* clear extra 0x0a */
3148         p_env->host_name[MAX_NAME_LEN] = 0x00;
3149         CLAW_DBF_TEXT(2, setup, "HstnSet");
3150         CLAW_DBF_TEXT_(2, setup, "%s", p_env->host_name);
3151
3152         return count;
3153 }
3154
3155 static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
3156
3157 static ssize_t
3158 claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
3159 {
3160         struct claw_privbk *priv;
3161         struct claw_env *  p_env;
3162
3163         priv = dev_get_drvdata(dev);
3164         if (!priv)
3165                 return -ENODEV;
3166         p_env = priv->p_env;
3167         return sprintf(buf, "%s\n", p_env->adapter_name);
3168 }
3169
3170 static ssize_t
3171 claw_adname_write(struct device *dev, struct device_attribute *attr,
3172          const char *buf, size_t count)
3173 {
3174         struct claw_privbk *priv;
3175         struct claw_env *  p_env;
3176
3177         priv = dev_get_drvdata(dev);
3178         if (!priv)
3179                 return -ENODEV;
3180         p_env = priv->p_env;
3181         if (count > MAX_NAME_LEN+1)
3182                 return -EINVAL;
3183         memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
3184         strncpy(p_env->adapter_name,buf, count);
3185         p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
3186         p_env->adapter_name[MAX_NAME_LEN] = 0x00;
3187         CLAW_DBF_TEXT(2, setup, "AdnSet");
3188         CLAW_DBF_TEXT_(2, setup, "%s", p_env->adapter_name);
3189
3190         return count;
3191 }
3192
3193 static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
3194
3195 static ssize_t
3196 claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
3197 {
3198         struct claw_privbk *priv;
3199         struct claw_env *  p_env;
3200
3201         priv = dev_get_drvdata(dev);
3202         if (!priv)
3203                 return -ENODEV;
3204         p_env = priv->p_env;
3205         return sprintf(buf, "%s\n",
3206                        p_env->api_type);
3207 }
3208
3209 static ssize_t
3210 claw_apname_write(struct device *dev, struct device_attribute *attr,
3211         const char *buf, size_t count)
3212 {
3213         struct claw_privbk *priv;
3214         struct claw_env *  p_env;
3215
3216         priv = dev_get_drvdata(dev);
3217         if (!priv)
3218                 return -ENODEV;
3219         p_env = priv->p_env;
3220         if (count > MAX_NAME_LEN+1)
3221                 return -EINVAL;
3222         memset(p_env->api_type, 0x20, MAX_NAME_LEN);
3223         strncpy(p_env->api_type,buf, count);
3224         p_env->api_type[count-1] = 0x20;  /* we get a loose 0x0a */
3225         p_env->api_type[MAX_NAME_LEN] = 0x00;
3226         if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
3227                 p_env->read_size=DEF_PACK_BUFSIZE;
3228                 p_env->write_size=DEF_PACK_BUFSIZE;
3229                 p_env->packing=PACKING_ASK;
3230                 CLAW_DBF_TEXT(2, setup, "PACKING");
3231         }
3232         else {
3233                 p_env->packing=0;
3234                 p_env->read_size=CLAW_FRAME_SIZE;
3235                 p_env->write_size=CLAW_FRAME_SIZE;
3236                 CLAW_DBF_TEXT(2, setup, "ApiSet");
3237         }
3238         CLAW_DBF_TEXT_(2, setup, "%s", p_env->api_type);
3239         return count;
3240 }
3241
3242 static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
3243
3244 static ssize_t
3245 claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
3246 {
3247         struct claw_privbk *priv;
3248         struct claw_env * p_env;
3249
3250         priv = dev_get_drvdata(dev);
3251         if (!priv)
3252                 return -ENODEV;
3253         p_env = priv->p_env;
3254         return sprintf(buf, "%d\n", p_env->write_buffers);
3255 }
3256
3257 static ssize_t
3258 claw_wbuff_write(struct device *dev, struct device_attribute *attr,
3259         const char *buf, size_t count)
3260 {
3261         struct claw_privbk *priv;
3262         struct claw_env *  p_env;
3263         int nnn,max;
3264
3265         priv = dev_get_drvdata(dev);
3266         if (!priv)
3267                 return -ENODEV;
3268         p_env = priv->p_env;
3269         sscanf(buf, "%i", &nnn);
3270         if (p_env->packing) {
3271                 max = 64;
3272         }
3273         else {
3274                 max = 512;
3275         }
3276         if ((nnn > max ) || (nnn < 2))
3277                 return -EINVAL;
3278         p_env->write_buffers = nnn;
3279         CLAW_DBF_TEXT(2, setup, "Wbufset");
3280         CLAW_DBF_TEXT_(2, setup, "WB=%d", p_env->write_buffers);
3281         return count;
3282 }
3283
3284 static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
3285
3286 static ssize_t
3287 claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
3288 {
3289         struct claw_privbk *priv;
3290         struct claw_env *  p_env;
3291
3292         priv = dev_get_drvdata(dev);
3293         if (!priv)
3294                 return -ENODEV;
3295         p_env = priv->p_env;
3296         return sprintf(buf, "%d\n", p_env->read_buffers);
3297 }
3298
3299 static ssize_t
3300 claw_rbuff_write(struct device *dev, struct device_attribute *attr,
3301         const char *buf, size_t count)
3302 {
3303         struct claw_privbk *priv;
3304         struct claw_env *p_env;
3305         int nnn,max;
3306
3307         priv = dev_get_drvdata(dev);
3308         if (!priv)
3309                 return -ENODEV;
3310         p_env = priv->p_env;
3311         sscanf(buf, "%i", &nnn);
3312         if (p_env->packing) {
3313                 max = 64;
3314         }
3315         else {
3316                 max = 512;
3317         }
3318         if ((nnn > max ) || (nnn < 2))
3319                 return -EINVAL;
3320         p_env->read_buffers = nnn;
3321         CLAW_DBF_TEXT(2, setup, "Rbufset");
3322         CLAW_DBF_TEXT_(2, setup, "RB=%d", p_env->read_buffers);
3323         return count;
3324 }
3325
3326 static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
3327
3328 static struct attribute *claw_attr[] = {
3329         &dev_attr_read_buffer.attr,
3330         &dev_attr_write_buffer.attr,
3331         &dev_attr_adapter_name.attr,
3332         &dev_attr_api_type.attr,
3333         &dev_attr_host_name.attr,
3334         NULL,
3335 };
3336
3337 static struct attribute_group claw_attr_group = {
3338         .attrs = claw_attr,
3339 };
3340
3341 static int
3342 claw_add_files(struct device *dev)
3343 {
3344         CLAW_DBF_TEXT(2, setup, "add_file");
3345         return sysfs_create_group(&dev->kobj, &claw_attr_group);
3346 }
3347
3348 static void
3349 claw_remove_files(struct device *dev)
3350 {
3351         CLAW_DBF_TEXT(2, setup, "rem_file");
3352         sysfs_remove_group(&dev->kobj, &claw_attr_group);
3353 }
3354
3355 /*--------------------------------------------------------------------*
3356 *    claw_init  and cleanup                                           *
3357 *---------------------------------------------------------------------*/
3358
3359 static void __exit
3360 claw_cleanup(void)
3361 {
3362         driver_remove_file(&claw_group_driver.driver,
3363                            &driver_attr_group);
3364         ccwgroup_driver_unregister(&claw_group_driver);
3365         ccw_driver_unregister(&claw_ccw_driver);
3366         root_device_unregister(claw_root_dev);
3367         claw_unregister_debug_facility();
3368         pr_info("Driver unloaded\n");
3369
3370 }
3371
3372 /**
3373  * Initialize module.
3374  * This is called just after the module is loaded.
3375  *
3376  * @return 0 on success, !0 on error.
3377  */
3378 static int __init
3379 claw_init(void)
3380 {
3381         int ret = 0;
3382
3383         pr_info("Loading %s\n", version);
3384         ret = claw_register_debug_facility();
3385         if (ret) {
3386                 pr_err("Registering with the S/390 debug feature"
3387                         " failed with error code %d\n", ret);
3388                 goto out_err;
3389         }
3390         CLAW_DBF_TEXT(2, setup, "init_mod");
3391         claw_root_dev = root_device_register("claw");
3392         ret = IS_ERR(claw_root_dev) ? PTR_ERR(claw_root_dev) : 0;
3393         if (ret)
3394                 goto register_err;
3395         ret = ccw_driver_register(&claw_ccw_driver);
3396         if (ret)
3397                 goto ccw_err;
3398         claw_group_driver.driver.groups = claw_group_attr_groups;
3399         ret = ccwgroup_driver_register(&claw_group_driver);
3400         if (ret)
3401                 goto ccwgroup_err;
3402         return 0;
3403
3404 ccwgroup_err:
3405         ccw_driver_unregister(&claw_ccw_driver);
3406 ccw_err:
3407         root_device_unregister(claw_root_dev);
3408 register_err:
3409         CLAW_DBF_TEXT(2, setup, "init_bad");
3410         claw_unregister_debug_facility();
3411 out_err:
3412         pr_err("Initializing the claw device driver failed\n");
3413         return ret;
3414 }
3415
3416 module_init(claw_init);
3417 module_exit(claw_cleanup);
3418
3419 MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
3420 MODULE_DESCRIPTION("Linux for System z CLAW Driver\n" \
3421                         "Copyright 2000,2008 IBM Corporation\n");
3422 MODULE_LICENSE("GPL");