Pileus Git - ~andy/linux/blob - drivers/s390/net/claw.c

   1 /*
   2  *  drivers/s390/net/claw.c
   3  *    ESCON CLAW network driver
   4  *
   5  *  Linux for zSeries version
   6  *    Copyright 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         .owner       = THIS_MODULE,
 268         .name        = "claw",
 269         .max_slaves  = 2,
 270         .driver_id   = 0xC3D3C1E6,
 271         .probe       = claw_probe,
 272         .remove      = claw_remove_device,
 273         .set_online  = claw_new_device,
 274         .set_offline = claw_shutdown_device,
 275         .prepare     = claw_pm_prepare,
 276 };
 277
 278 static struct ccw_device_id claw_ids[] = {
 279         {CCW_DEVICE(0x3088, 0x61), .driver_info = claw_channel_type_claw},
 280         {},
 281 };
 282 MODULE_DEVICE_TABLE(ccw, claw_ids);
 283
 284 static struct ccw_driver claw_ccw_driver = {
 285         .owner  = THIS_MODULE,
 286         .name   = "claw",
 287         .ids    = claw_ids,
 288         .probe  = ccwgroup_probe_ccwdev,
 289         .remove = ccwgroup_remove_ccwdev,
 290 };
 291
 292 static ssize_t
 293 claw_driver_group_store(struct device_driver *ddrv, const char *buf,
 294                         size_t count)
 295 {
 296         int err;
 297         err = ccwgroup_create_from_string(claw_root_dev,
 298                                           claw_group_driver.driver_id,
 299                                           &claw_ccw_driver, 2, buf);
 300         return err ? err : count;
 301 }
 302
 303 static DRIVER_ATTR(group, 0200, NULL, claw_driver_group_store);
 304
 305 static struct attribute *claw_group_attrs[] = {
 306         &driver_attr_group.attr,
 307         NULL,
 308 };
 309
 310 static struct attribute_group claw_group_attr_group = {
 311         .attrs = claw_group_attrs,
 312 };
 313
 314 static const struct attribute_group *claw_group_attr_groups[] = {
 315         &claw_group_attr_group,
 316         NULL,
 317 };
 318
 319 /*
 320 *       Key functions
 321 */
 322
 323 /*----------------------------------------------------------------*
 324  *   claw_probe                                                   *
 325  *      this function is called for each CLAW device.             *
 326  *----------------------------------------------------------------*/
 327 static int
 328 claw_probe(struct ccwgroup_device *cgdev)
 329 {
 330         int             rc;
 331         struct claw_privbk *privptr=NULL;
 332
 333         CLAW_DBF_TEXT(2, setup, "probe");
 334         if (!get_device(&cgdev->dev))
 335                 return -ENODEV;
 336         privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL);
 337         dev_set_drvdata(&cgdev->dev, privptr);
 338         if (privptr == NULL) {
 339                 probe_error(cgdev);
 340                 put_device(&cgdev->dev);
 341                 CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
 342                 return -ENOMEM;
 343         }
 344         privptr->p_mtc_envelope= kzalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
 345         privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL);
 346         if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
 347                 probe_error(cgdev);
 348                 put_device(&cgdev->dev);
 349                 CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
 350                 return -ENOMEM;
 351         }
 352         memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
 353         memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
 354         memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
 355         privptr->p_env->packing = 0;
 356         privptr->p_env->write_buffers = 5;
 357         privptr->p_env->read_buffers = 5;
 358         privptr->p_env->read_size = CLAW_FRAME_SIZE;
 359         privptr->p_env->write_size = CLAW_FRAME_SIZE;
 360         rc = claw_add_files(&cgdev->dev);
 361         if (rc) {
 362                 probe_error(cgdev);
 363                 put_device(&cgdev->dev);
 364                 dev_err(&cgdev->dev, "Creating the /proc files for a new"
 365                 " CLAW device failed\n");
 366                 CLAW_DBF_TEXT_(2, setup, "probex%d", rc);
 367                 return rc;
 368         }
 369         privptr->p_env->p_priv = privptr;
 370         cgdev->cdev[0]->handler = claw_irq_handler;
 371         cgdev->cdev[1]->handler = claw_irq_handler;
 372         CLAW_DBF_TEXT(2, setup, "prbext 0");
 373
 374         return 0;
 375 }  /*  end of claw_probe       */
 376
 377 /*-------------------------------------------------------------------*
 378  *   claw_tx                                                         *
 379  *-------------------------------------------------------------------*/
 380
 381 static int
 382 claw_tx(struct sk_buff *skb, struct net_device *dev)
 383 {
 384         int             rc;
 385         struct claw_privbk *privptr = dev->ml_priv;
 386         unsigned long saveflags;
 387         struct chbk *p_ch;
 388
 389         CLAW_DBF_TEXT(4, trace, "claw_tx");
 390         p_ch = &privptr->channel[WRITE_CHANNEL];
 391         spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
 392         rc=claw_hw_tx( skb, dev, 1 );
 393         spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
 394         CLAW_DBF_TEXT_(4, trace, "clawtx%d", rc);
 395         if (rc)
 396                 rc = NETDEV_TX_BUSY;
 397         else
 398                 rc = NETDEV_TX_OK;
 399         return rc;
 400 }   /*  end of claw_tx */
 401
 402 /*------------------------------------------------------------------*
 403  *  pack the collect queue into an skb and return it                *
 404  *   If not packing just return the top skb from the queue          *
 405  *------------------------------------------------------------------*/
 406
 407 static struct sk_buff *
 408 claw_pack_skb(struct claw_privbk *privptr)
 409 {
 410         struct sk_buff *new_skb,*held_skb;
 411         struct chbk *p_ch = &privptr->channel[WRITE_CHANNEL];
 412         struct claw_env  *p_env = privptr->p_env;
 413         int     pkt_cnt,pk_ind,so_far;
 414
 415         new_skb = NULL;         /* assume no dice */
 416         pkt_cnt = 0;
 417         CLAW_DBF_TEXT(4, trace, "PackSKBe");
 418         if (!skb_queue_empty(&p_ch->collect_queue)) {
 419         /* some data */
 420                 held_skb = skb_dequeue(&p_ch->collect_queue);
 421                 if (held_skb)
 422                         dev_kfree_skb_any(held_skb);
 423                 else
 424                         return NULL;
 425                 if (p_env->packing != DO_PACKED)
 426                         return held_skb;
 427                 /* get a new SKB we will pack at least one */
 428                 new_skb = dev_alloc_skb(p_env->write_size);
 429                 if (new_skb == NULL) {
 430                         atomic_inc(&held_skb->users);
 431                         skb_queue_head(&p_ch->collect_queue,held_skb);
 432                         return NULL;
 433                 }
 434                 /* we have packed packet and a place to put it  */
 435                 pk_ind = 1;
 436                 so_far = 0;
 437                 new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
 438                 while ((pk_ind) && (held_skb != NULL)) {
 439                         if (held_skb->len+so_far <= p_env->write_size-8) {
 440                                 memcpy(skb_put(new_skb,held_skb->len),
 441                                         held_skb->data,held_skb->len);
 442                                 privptr->stats.tx_packets++;
 443                                 so_far += held_skb->len;
 444                                 pkt_cnt++;
 445                                 dev_kfree_skb_any(held_skb);
 446                                 held_skb = skb_dequeue(&p_ch->collect_queue);
 447                                 if (held_skb)
 448                                         atomic_dec(&held_skb->users);
 449                         } else {
 450                                 pk_ind = 0;
 451                                 atomic_inc(&held_skb->users);
 452                                 skb_queue_head(&p_ch->collect_queue,held_skb);
 453                         }
 454                 }
 455         }
 456         CLAW_DBF_TEXT(4, trace, "PackSKBx");
 457         return new_skb;
 458 }
 459
 460 /*-------------------------------------------------------------------*
 461  *   claw_change_mtu                                                 *
 462  *                                                                   *
 463  *-------------------------------------------------------------------*/
 464
 465 static int
 466 claw_change_mtu(struct net_device *dev, int new_mtu)
 467 {
 468         struct claw_privbk *privptr = dev->ml_priv;
 469         int buff_size;
 470         CLAW_DBF_TEXT(4, trace, "setmtu");
 471         buff_size = privptr->p_env->write_size;
 472         if ((new_mtu < 60) || (new_mtu > buff_size)) {
 473                 return -EINVAL;
 474         }
 475         dev->mtu = new_mtu;
 476         return 0;
 477 }  /*   end of claw_change_mtu */
 478
 479
 480 /*-------------------------------------------------------------------*
 481  *   claw_open                                                       *
 482  *                                                                   *
 483  *-------------------------------------------------------------------*/
 484 static int
 485 claw_open(struct net_device *dev)
 486 {
 487
 488         int     rc;
 489         int     i;
 490         unsigned long       saveflags=0;
 491         unsigned long       parm;
 492         struct claw_privbk  *privptr;
 493         DECLARE_WAITQUEUE(wait, current);
 494         struct timer_list  timer;
 495         struct ccwbk *p_buf;
 496
 497         CLAW_DBF_TEXT(4, trace, "open");
 498         privptr = (struct claw_privbk *)dev->ml_priv;
 499         /*   allocate and initialize CCW blocks */
 500         if (privptr->buffs_alloc == 0) {
 501                 rc=init_ccw_bk(dev);
 502                 if (rc) {
 503                         CLAW_DBF_TEXT(2, trace, "openmem");
 504                         return -ENOMEM;
 505                 }
 506         }
 507         privptr->system_validate_comp=0;
 508         privptr->release_pend=0;
 509         if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
 510                 privptr->p_env->read_size=DEF_PACK_BUFSIZE;
 511                 privptr->p_env->write_size=DEF_PACK_BUFSIZE;
 512                 privptr->p_env->packing=PACKING_ASK;
 513         } else {
 514                 privptr->p_env->packing=0;
 515                 privptr->p_env->read_size=CLAW_FRAME_SIZE;
 516                 privptr->p_env->write_size=CLAW_FRAME_SIZE;
 517         }
 518         claw_set_busy(dev);
 519         tasklet_init(&privptr->channel[READ_CHANNEL].tasklet, claw_irq_tasklet,
 520                 (unsigned long) &privptr->channel[READ_CHANNEL]);
 521         for ( i = 0; i < 2;  i++) {
 522                 CLAW_DBF_TEXT_(2, trace, "opn_ch%d", i);
 523                 init_waitqueue_head(&privptr->channel[i].wait);
 524                 /* skb_queue_head_init(&p_ch->io_queue); */
 525                 if (i == WRITE_CHANNEL)
 526                         skb_queue_head_init(
 527                                 &privptr->channel[WRITE_CHANNEL].collect_queue);
 528                 privptr->channel[i].flag_a = 0;
 529                 privptr->channel[i].IO_active = 0;
 530                 privptr->channel[i].flag  &= ~CLAW_TIMER;
 531                 init_timer(&timer);
 532                 timer.function = (void *)claw_timer;
 533                 timer.data = (unsigned long)(&privptr->channel[i]);
 534                 timer.expires = jiffies + 15*HZ;
 535                 add_timer(&timer);
 536                 spin_lock_irqsave(get_ccwdev_lock(
 537                         privptr->channel[i].cdev), saveflags);
 538                 parm = (unsigned long) &privptr->channel[i];
 539                 privptr->channel[i].claw_state = CLAW_START_HALT_IO;
 540                 rc = 0;
 541                 add_wait_queue(&privptr->channel[i].wait, &wait);
 542                 rc = ccw_device_halt(
 543                         (struct ccw_device *)privptr->channel[i].cdev,parm);
 544                 set_current_state(TASK_INTERRUPTIBLE);
 545                 spin_unlock_irqrestore(
 546                         get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
 547                 schedule();
 548                 set_current_state(TASK_RUNNING);
 549                 remove_wait_queue(&privptr->channel[i].wait, &wait);
 550                 if(rc != 0)
 551                         ccw_check_return_code(privptr->channel[i].cdev, rc);
 552                 if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
 553                         del_timer(&timer);
 554         }
 555         if ((((privptr->channel[READ_CHANNEL].last_dstat |
 556                 privptr->channel[WRITE_CHANNEL].last_dstat) &
 557            ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
 558            (((privptr->channel[READ_CHANNEL].flag |
 559                 privptr->channel[WRITE_CHANNEL].flag) & CLAW_TIMER) != 0x00)) {
 560                 dev_info(&privptr->channel[READ_CHANNEL].cdev->dev,
 561                         "%s: remote side is not ready\n", dev->name);
 562                 CLAW_DBF_TEXT(2, trace, "notrdy");
 563
 564                 for ( i = 0; i < 2;  i++) {
 565                         spin_lock_irqsave(
 566                                 get_ccwdev_lock(privptr->channel[i].cdev),
 567                                 saveflags);
 568                         parm = (unsigned long) &privptr->channel[i];
 569                         privptr->channel[i].claw_state = CLAW_STOP;
 570                         rc = ccw_device_halt(
 571                                 (struct ccw_device *)&privptr->channel[i].cdev,
 572                                 parm);
 573                         spin_unlock_irqrestore(
 574                                 get_ccwdev_lock(privptr->channel[i].cdev),
 575                                 saveflags);
 576                         if (rc != 0) {
 577                                 ccw_check_return_code(
 578                                         privptr->channel[i].cdev, rc);
 579                         }
 580                 }
 581                 free_pages((unsigned long)privptr->p_buff_ccw,
 582                         (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
 583                 if (privptr->p_env->read_size < PAGE_SIZE) {
 584                         free_pages((unsigned long)privptr->p_buff_read,
 585                                (int)pages_to_order_of_mag(
 586                                         privptr->p_buff_read_num));
 587                 }
 588                 else {
 589                         p_buf=privptr->p_read_active_first;
 590                         while (p_buf!=NULL) {
 591                                 free_pages((unsigned long)p_buf->p_buffer,
 592                                       (int)pages_to_order_of_mag(
 593                                         privptr->p_buff_pages_perread ));
 594                                 p_buf=p_buf->next;
 595                         }
 596                 }
 597                 if (privptr->p_env->write_size < PAGE_SIZE ) {
 598                         free_pages((unsigned long)privptr->p_buff_write,
 599                              (int)pages_to_order_of_mag(
 600                                 privptr->p_buff_write_num));
 601                 }
 602                 else {
 603                         p_buf=privptr->p_write_active_first;
 604                         while (p_buf!=NULL) {
 605                                 free_pages((unsigned long)p_buf->p_buffer,
 606                                      (int)pages_to_order_of_mag(
 607                                         privptr->p_buff_pages_perwrite ));
 608                                 p_buf=p_buf->next;
 609                         }
 610                 }
 611                 privptr->buffs_alloc = 0;
 612                 privptr->channel[READ_CHANNEL].flag = 0x00;
 613                 privptr->channel[WRITE_CHANNEL].flag = 0x00;
 614                 privptr->p_buff_ccw=NULL;
 615                 privptr->p_buff_read=NULL;
 616                 privptr->p_buff_write=NULL;
 617                 claw_clear_busy(dev);
 618                 CLAW_DBF_TEXT(2, trace, "open EIO");
 619                 return -EIO;
 620         }
 621
 622         /*   Send SystemValidate command */
 623
 624         claw_clear_busy(dev);
 625         CLAW_DBF_TEXT(4, trace, "openok");
 626         return 0;
 627 }    /*     end of claw_open    */
 628
 629 /*-------------------------------------------------------------------*
 630 *                                                                    *
 631 *       claw_irq_handler                                             *
 632 *                                                                    *
 633 *--------------------------------------------------------------------*/
 634 static void
 635 claw_irq_handler(struct ccw_device *cdev,
 636         unsigned long intparm, struct irb *irb)
 637 {
 638         struct chbk *p_ch = NULL;
 639         struct claw_privbk *privptr = NULL;
 640         struct net_device *dev = NULL;
 641         struct claw_env  *p_env;
 642         struct chbk *p_ch_r=NULL;
 643
 644         kstat_cpu(smp_processor_id()).irqs[IOINT_CLW]++;
 645         CLAW_DBF_TEXT(4, trace, "clawirq");
 646         /* Bypass all 'unsolicited interrupts' */
 647         privptr = dev_get_drvdata(&cdev->dev);
 648         if (!privptr) {
 649                 dev_warn(&cdev->dev, "An uninitialized CLAW device received an"
 650                         " IRQ, c-%02x d-%02x\n",
 651                         irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
 652                 CLAW_DBF_TEXT(2, trace, "badirq");
 653                 return;
 654         }
 655
 656         /* Try to extract channel from driver data. */
 657         if (privptr->channel[READ_CHANNEL].cdev == cdev)
 658                 p_ch = &privptr->channel[READ_CHANNEL];
 659         else if (privptr->channel[WRITE_CHANNEL].cdev == cdev)
 660                 p_ch = &privptr->channel[WRITE_CHANNEL];
 661         else {
 662                 dev_warn(&cdev->dev, "The device is not a CLAW device\n");
 663                 CLAW_DBF_TEXT(2, trace, "badchan");
 664                 return;
 665         }
 666         CLAW_DBF_TEXT_(4, trace, "IRQCH=%d", p_ch->flag);
 667
 668         dev = (struct net_device *) (p_ch->ndev);
 669         p_env=privptr->p_env;
 670
 671         /* Copy interruption response block. */
 672         memcpy(p_ch->irb, irb, sizeof(struct irb));
 673
 674         /* Check for good subchannel return code, otherwise info message */
 675         if (irb->scsw.cmd.cstat && !(irb->scsw.cmd.cstat & SCHN_STAT_PCI)) {
 676                 dev_info(&cdev->dev,
 677                         "%s: subchannel check for device: %04x -"
 678                         " Sch Stat %02x  Dev Stat %02x CPA - %04x\n",
 679                         dev->name, p_ch->devno,
 680                         irb->scsw.cmd.cstat, irb->scsw.cmd.dstat,
 681                         irb->scsw.cmd.cpa);
 682                 CLAW_DBF_TEXT(2, trace, "chanchk");
 683                 /* return; */
 684         }
 685
 686         /* Check the reason-code of a unit check */
 687         if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
 688                 ccw_check_unit_check(p_ch, irb->ecw[0]);
 689
 690         /* State machine to bring the connection up, down and to restart */
 691         p_ch->last_dstat = irb->scsw.cmd.dstat;
 692
 693         switch (p_ch->claw_state) {
 694         case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
 695                 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
 696                 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
 697                 (p_ch->irb->scsw.cmd.stctl ==
 698                 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND))))
 699                         return;
 700                 wake_up(&p_ch->wait);   /* wake up claw_release */
 701                 CLAW_DBF_TEXT(4, trace, "stop");
 702                 return;
 703         case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open  */
 704                 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
 705                 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
 706                 (p_ch->irb->scsw.cmd.stctl ==
 707                 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
 708                         CLAW_DBF_TEXT(4, trace, "haltio");
 709                         return;
 710                 }
 711                 if (p_ch->flag == CLAW_READ) {
 712                         p_ch->claw_state = CLAW_START_READ;
 713                         wake_up(&p_ch->wait); /* wake claw_open (READ)*/
 714                 } else if (p_ch->flag == CLAW_WRITE) {
 715                         p_ch->claw_state = CLAW_START_WRITE;
 716                         /*      send SYSTEM_VALIDATE                    */
 717                         claw_strt_read(dev, LOCK_NO);
 718                         claw_send_control(dev,
 719                                 SYSTEM_VALIDATE_REQUEST,
 720                                 0, 0, 0,
 721                                 p_env->host_name,
 722                                 p_env->adapter_name);
 723                 } else {
 724                         dev_warn(&cdev->dev, "The CLAW device received"
 725                                 " an unexpected IRQ, "
 726                                 "c-%02x d-%02x\n",
 727                                 irb->scsw.cmd.cstat,
 728                                 irb->scsw.cmd.dstat);
 729                         return;
 730                         }
 731                 CLAW_DBF_TEXT(4, trace, "haltio");
 732                 return;
 733         case CLAW_START_READ:
 734                 CLAW_DBF_TEXT(4, trace, "ReadIRQ");
 735                 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
 736                         clear_bit(0, (void *)&p_ch->IO_active);
 737                         if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
 738                             (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
 739                             (p_ch->irb->ecw[0])        == 0) {
 740                                 privptr->stats.rx_errors++;
 741                                 dev_info(&cdev->dev,
 742                                         "%s: Restart is required after remote "
 743                                         "side recovers \n",
 744                                         dev->name);
 745                         }
 746                         CLAW_DBF_TEXT(4, trace, "notrdy");
 747                         return;
 748                 }
 749                 if ((p_ch->irb->scsw.cmd.cstat & SCHN_STAT_PCI) &&
 750                         (p_ch->irb->scsw.cmd.dstat == 0)) {
 751                         if (test_and_set_bit(CLAW_BH_ACTIVE,
 752                                 (void *)&p_ch->flag_a) == 0)
 753                                 tasklet_schedule(&p_ch->tasklet);
 754                         else
 755                                 CLAW_DBF_TEXT(4, trace, "PCINoBH");
 756                         CLAW_DBF_TEXT(4, trace, "PCI_read");
 757                         return;
 758                 }
 759                 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
 760                  (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
 761                  (p_ch->irb->scsw.cmd.stctl ==
 762                  (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
 763                         CLAW_DBF_TEXT(4, trace, "SPend_rd");
 764                         return;
 765                 }
 766                 clear_bit(0, (void *)&p_ch->IO_active);
 767                 claw_clearbit_busy(TB_RETRY, dev);
 768                 if (test_and_set_bit(CLAW_BH_ACTIVE,
 769                         (void *)&p_ch->flag_a) == 0)
 770                         tasklet_schedule(&p_ch->tasklet);
 771                 else
 772                         CLAW_DBF_TEXT(4, trace, "RdBHAct");
 773                 CLAW_DBF_TEXT(4, trace, "RdIRQXit");
 774                 return;
 775         case CLAW_START_WRITE:
 776                 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
 777                         dev_info(&cdev->dev,
 778                                 "%s: Unit Check Occured in "
 779                                 "write channel\n", dev->name);
 780                         clear_bit(0, (void *)&p_ch->IO_active);
 781                         if (p_ch->irb->ecw[0] & 0x80) {
 782                                 dev_info(&cdev->dev,
 783                                         "%s: Resetting Event "
 784                                         "occurred:\n", dev->name);
 785                                 init_timer(&p_ch->timer);
 786                                 p_ch->timer.function =
 787                                         (void *)claw_write_retry;
 788                                 p_ch->timer.data = (unsigned long)p_ch;
 789                                 p_ch->timer.expires = jiffies + 10*HZ;
 790                                 add_timer(&p_ch->timer);
 791                                 dev_info(&cdev->dev,
 792                                         "%s: write connection "
 793                                         "restarting\n", dev->name);
 794                         }
 795                         CLAW_DBF_TEXT(4, trace, "rstrtwrt");
 796                         return;
 797                 }
 798                 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) {
 799                         clear_bit(0, (void *)&p_ch->IO_active);
 800                         dev_info(&cdev->dev,
 801                                 "%s: Unit Exception "
 802                                 "occurred in write channel\n",
 803                                 dev->name);
 804                 }
 805                 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
 806                 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
 807                 (p_ch->irb->scsw.cmd.stctl ==
 808                 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
 809                         CLAW_DBF_TEXT(4, trace, "writeUE");
 810                         return;
 811                 }
 812                 clear_bit(0, (void *)&p_ch->IO_active);
 813                 if (claw_test_and_setbit_busy(TB_TX, dev) == 0) {
 814                         claw_write_next(p_ch);
 815                         claw_clearbit_busy(TB_TX, dev);
 816                         claw_clear_busy(dev);
 817                 }
 818                 p_ch_r = (struct chbk *)&privptr->channel[READ_CHANNEL];
 819                 if (test_and_set_bit(CLAW_BH_ACTIVE,
 820                         (void *)&p_ch_r->flag_a) == 0)
 821                         tasklet_schedule(&p_ch_r->tasklet);
 822                 CLAW_DBF_TEXT(4, trace, "StWtExit");
 823                 return;
 824         default:
 825                 dev_warn(&cdev->dev,
 826                         "The CLAW device for %s received an unexpected IRQ\n",
 827                          dev->name);
 828                 CLAW_DBF_TEXT(2, trace, "badIRQ");
 829                 return;
 830         }
 831
 832 }       /*   end of claw_irq_handler    */
 833
 834
 835 /*-------------------------------------------------------------------*
 836 *       claw_irq_tasklet                                             *
 837 *                                                                    *
 838 *--------------------------------------------------------------------*/
 839 static void
 840 claw_irq_tasklet ( unsigned long data )
 841 {
 842         struct chbk * p_ch;
 843         struct net_device  *dev;
 844         struct claw_privbk *       privptr;
 845
 846         p_ch = (struct chbk *) data;
 847         dev = (struct net_device *)p_ch->ndev;
 848         CLAW_DBF_TEXT(4, trace, "IRQtask");
 849         privptr = (struct claw_privbk *)dev->ml_priv;
 850         unpack_read(dev);
 851         clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
 852         CLAW_DBF_TEXT(4, trace, "TskletXt");
 853         return;
 854 }       /*    end of claw_irq_bh    */
 855
 856 /*-------------------------------------------------------------------*
 857 *       claw_release                                                 *
 858 *                                                                    *
 859 *--------------------------------------------------------------------*/
 860 static int
 861 claw_release(struct net_device *dev)
 862 {
 863         int                rc;
 864         int                i;
 865         unsigned long      saveflags;
 866         unsigned long      parm;
 867         struct claw_privbk *privptr;
 868         DECLARE_WAITQUEUE(wait, current);
 869         struct ccwbk*             p_this_ccw;
 870         struct ccwbk*             p_buf;
 871
 872         if (!dev)
 873                 return 0;
 874         privptr = (struct claw_privbk *)dev->ml_priv;
 875         if (!privptr)
 876                 return 0;
 877         CLAW_DBF_TEXT(4, trace, "release");
 878         privptr->release_pend=1;
 879         claw_setbit_busy(TB_STOP,dev);
 880         for ( i = 1; i >=0 ;  i--) {
 881                 spin_lock_irqsave(
 882                         get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
 883              /*   del_timer(&privptr->channel[READ_CHANNEL].timer);  */
 884                 privptr->channel[i].claw_state = CLAW_STOP;
 885                 privptr->channel[i].IO_active = 0;
 886                 parm = (unsigned long) &privptr->channel[i];
 887                 if (i == WRITE_CHANNEL)
 888                         claw_purge_skb_queue(
 889                                 &privptr->channel[WRITE_CHANNEL].collect_queue);
 890                 rc = ccw_device_halt (privptr->channel[i].cdev, parm);
 891                 if (privptr->system_validate_comp==0x00)  /* never opened? */
 892                    init_waitqueue_head(&privptr->channel[i].wait);
 893                 add_wait_queue(&privptr->channel[i].wait, &wait);
 894                 set_current_state(TASK_INTERRUPTIBLE);
 895                 spin_unlock_irqrestore(
 896                         get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
 897                 schedule();
 898                 set_current_state(TASK_RUNNING);
 899                 remove_wait_queue(&privptr->channel[i].wait, &wait);
 900                 if (rc != 0) {
 901                         ccw_check_return_code(privptr->channel[i].cdev, rc);
 902                 }
 903         }
 904         if (privptr->pk_skb != NULL) {
 905                 dev_kfree_skb_any(privptr->pk_skb);
 906                 privptr->pk_skb = NULL;
 907         }
 908         if(privptr->buffs_alloc != 1) {
 909                 CLAW_DBF_TEXT(4, trace, "none2fre");
 910                 return 0;
 911         }
 912         CLAW_DBF_TEXT(4, trace, "freebufs");
 913         if (privptr->p_buff_ccw != NULL) {
 914                 free_pages((unsigned long)privptr->p_buff_ccw,
 915                         (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
 916         }
 917         CLAW_DBF_TEXT(4, trace, "freeread");
 918         if (privptr->p_env->read_size < PAGE_SIZE) {
 919             if (privptr->p_buff_read != NULL) {
 920                 free_pages((unsigned long)privptr->p_buff_read,
 921                       (int)pages_to_order_of_mag(privptr->p_buff_read_num));
 922                 }
 923         }
 924         else {
 925                 p_buf=privptr->p_read_active_first;
 926                 while (p_buf!=NULL) {
 927                         free_pages((unsigned long)p_buf->p_buffer,
 928                              (int)pages_to_order_of_mag(
 929                                 privptr->p_buff_pages_perread ));
 930                         p_buf=p_buf->next;
 931                 }
 932         }
 933          CLAW_DBF_TEXT(4, trace, "freewrit");
 934         if (privptr->p_env->write_size < PAGE_SIZE ) {
 935                 free_pages((unsigned long)privptr->p_buff_write,
 936                       (int)pages_to_order_of_mag(privptr->p_buff_write_num));
 937         }
 938         else {
 939                 p_buf=privptr->p_write_active_first;
 940                 while (p_buf!=NULL) {
 941                         free_pages((unsigned long)p_buf->p_buffer,
 942                               (int)pages_to_order_of_mag(
 943                               privptr->p_buff_pages_perwrite ));
 944                         p_buf=p_buf->next;
 945                 }
 946         }
 947          CLAW_DBF_TEXT(4, trace, "clearptr");
 948         privptr->buffs_alloc = 0;
 949         privptr->p_buff_ccw=NULL;
 950         privptr->p_buff_read=NULL;
 951         privptr->p_buff_write=NULL;
 952         privptr->system_validate_comp=0;
 953         privptr->release_pend=0;
 954         /*      Remove any writes that were pending and reset all reads   */
 955         p_this_ccw=privptr->p_read_active_first;
 956         while (p_this_ccw!=NULL) {
 957                 p_this_ccw->header.length=0xffff;
 958                 p_this_ccw->header.opcode=0xff;
 959                 p_this_ccw->header.flag=0x00;
 960                 p_this_ccw=p_this_ccw->next;
 961         }
 962
 963         while (privptr->p_write_active_first!=NULL) {
 964                 p_this_ccw=privptr->p_write_active_first;
 965                 p_this_ccw->header.flag=CLAW_PENDING;
 966                 privptr->p_write_active_first=p_this_ccw->next;
 967                 p_this_ccw->next=privptr->p_write_free_chain;
 968                 privptr->p_write_free_chain=p_this_ccw;
 969                 ++privptr->write_free_count;
 970         }
 971         privptr->p_write_active_last=NULL;
 972         privptr->mtc_logical_link = -1;
 973         privptr->mtc_skipping = 1;
 974         privptr->mtc_offset=0;
 975
 976         if (((privptr->channel[READ_CHANNEL].last_dstat |
 977                 privptr->channel[WRITE_CHANNEL].last_dstat) &
 978                 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
 979                 dev_warn(&privptr->channel[READ_CHANNEL].cdev->dev,
 980                         "Deactivating %s completed with incorrect"
 981                         " subchannel status "
 982                         "(read %02x, write %02x)\n",
 983                 dev->name,
 984                 privptr->channel[READ_CHANNEL].last_dstat,
 985                 privptr->channel[WRITE_CHANNEL].last_dstat);
 986                  CLAW_DBF_TEXT(2, trace, "badclose");
 987         }
 988         CLAW_DBF_TEXT(4, trace, "rlsexit");
 989         return 0;
 990 }      /* end of claw_release     */
 991
 992 /*-------------------------------------------------------------------*
 993 *       claw_write_retry                                             *
 994 *                                                                    *
 995 *--------------------------------------------------------------------*/
 996
 997 static void
 998 claw_write_retry ( struct chbk *p_ch )
 999 {
1000
1001         struct net_device  *dev=p_ch->ndev;
1002
1003         CLAW_DBF_TEXT(4, trace, "w_retry");
1004         if (p_ch->claw_state == CLAW_STOP) {
1005                 return;
1006         }
1007         claw_strt_out_IO( dev );
1008         CLAW_DBF_TEXT(4, trace, "rtry_xit");
1009         return;
1010 }      /* end of claw_write_retry      */
1011
1012
1013 /*-------------------------------------------------------------------*
1014 *       claw_write_next                                              *
1015 *                                                                    *
1016 *--------------------------------------------------------------------*/
1017
1018 static void
1019 claw_write_next ( struct chbk * p_ch )
1020 {
1021
1022         struct net_device  *dev;
1023         struct claw_privbk *privptr=NULL;
1024         struct sk_buff *pk_skb;
1025         int     rc;
1026
1027         CLAW_DBF_TEXT(4, trace, "claw_wrt");
1028         if (p_ch->claw_state == CLAW_STOP)
1029                 return;
1030         dev = (struct net_device *) p_ch->ndev;
1031         privptr = (struct claw_privbk *) dev->ml_priv;
1032         claw_free_wrt_buf( dev );
1033         if ((privptr->write_free_count > 0) &&
1034             !skb_queue_empty(&p_ch->collect_queue)) {
1035                 pk_skb = claw_pack_skb(privptr);
1036                 while (pk_skb != NULL) {
1037                         rc = claw_hw_tx( pk_skb, dev,1);
1038                         if (privptr->write_free_count > 0) {
1039                                 pk_skb = claw_pack_skb(privptr);
1040                         } else
1041                                 pk_skb = NULL;
1042                 }
1043         }
1044         if (privptr->p_write_active_first!=NULL) {
1045                 claw_strt_out_IO(dev);
1046         }
1047         return;
1048 }      /* end of claw_write_next      */
1049
1050 /*-------------------------------------------------------------------*
1051 *                                                                    *
1052 *       claw_timer                                                   *
1053 *--------------------------------------------------------------------*/
1054
1055 static void
1056 claw_timer ( struct chbk * p_ch )
1057 {
1058         CLAW_DBF_TEXT(4, trace, "timer");
1059         p_ch->flag |= CLAW_TIMER;
1060         wake_up(&p_ch->wait);
1061         return;
1062 }      /* end of claw_timer  */
1063
1064 /*
1065 *
1066 *       functions
1067 */
1068
1069
1070 /*-------------------------------------------------------------------*
1071 *                                                                    *
1072 *     pages_to_order_of_mag                                          *
1073 *                                                                    *
1074 *    takes a number of pages from 1 to 512 and returns the           *
1075 *    log(num_pages)/log(2) get_free_pages() needs a base 2 order     *
1076 *    of magnitude get_free_pages() has an upper order of 9           *
1077 *--------------------------------------------------------------------*/
1078
1079 static int
1080 pages_to_order_of_mag(int num_of_pages)
1081 {
1082         int     order_of_mag=1;         /* assume 2 pages */
1083         int     nump;
1084
1085         CLAW_DBF_TEXT_(5, trace, "pages%d", num_of_pages);
1086         if (num_of_pages == 1)   {return 0; }  /* magnitude of 0 = 1 page */
1087         /* 512 pages = 2Meg on 4k page systems */
1088         if (num_of_pages >= 512) {return 9; }
1089         /* we have two or more pages order is at least 1 */
1090         for (nump=2 ;nump <= 512;nump*=2) {
1091           if (num_of_pages <= nump)
1092                   break;
1093           order_of_mag +=1;
1094         }
1095         if (order_of_mag > 9) { order_of_mag = 9; }  /* I know it's paranoid */
1096         CLAW_DBF_TEXT_(5, trace, "mag%d", order_of_mag);
1097         return order_of_mag;
1098 }
1099
1100 /*-------------------------------------------------------------------*
1101 *                                                                    *
1102 *     add_claw_reads                                                 *
1103 *                                                                    *
1104 *--------------------------------------------------------------------*/
1105 static int
1106 add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
1107         struct ccwbk* p_last)
1108 {
1109         struct claw_privbk *privptr;
1110         struct ccw1  temp_ccw;
1111         struct endccw * p_end;
1112         CLAW_DBF_TEXT(4, trace, "addreads");
1113         privptr = dev->ml_priv;
1114         p_end = privptr->p_end_ccw;
1115
1116         /* first CCW and last CCW contains a new set of read channel programs
1117         *       to apend the running channel programs
1118         */
1119         if ( p_first==NULL) {
1120                 CLAW_DBF_TEXT(4, trace, "addexit");
1121                 return 0;
1122         }
1123
1124         /* set up ending CCW sequence for this segment */
1125         if (p_end->read1) {
1126                 p_end->read1=0x00;    /*  second ending CCW is now active */
1127                 /*      reset ending CCWs and setup TIC CCWs              */
1128                 p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1129                 p_end->read2_nop2.flags  = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1130                 p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
1131                 p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
1132                 p_end->read2_nop2.cda=0;
1133                 p_end->read2_nop2.count=1;
1134         }
1135         else {
1136                 p_end->read1=0x01;  /* first ending CCW is now active */
1137                 /*      reset ending CCWs and setup TIC CCWs          */
1138                 p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1139                 p_end->read1_nop2.flags  = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1140                 p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
1141                 p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
1142                 p_end->read1_nop2.cda=0;
1143                 p_end->read1_nop2.count=1;
1144         }
1145
1146         if ( privptr-> p_read_active_first ==NULL ) {
1147                 privptr->p_read_active_first = p_first;  /*  set new first */
1148                 privptr->p_read_active_last  = p_last;   /*  set new last  */
1149         }
1150         else {
1151
1152                 /* set up TIC ccw  */
1153                 temp_ccw.cda= (__u32)__pa(&p_first->read);
1154                 temp_ccw.count=0;
1155                 temp_ccw.flags=0;
1156                 temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
1157
1158
1159                 if (p_end->read1) {
1160
1161                /* first set of CCW's is chained to the new read              */
1162                /* chain, so the second set is chained to the active chain.   */
1163                /* Therefore modify the second set to point to the new        */
1164                /* read chain set up TIC CCWs                                 */
1165                /* make sure we update the CCW so channel doesn't fetch it    */
1166                /* when it's only half done                                   */
1167                         memcpy( &p_end->read2_nop2, &temp_ccw ,
1168                                 sizeof(struct ccw1));
1169                         privptr->p_read_active_last->r_TIC_1.cda=
1170                                 (__u32)__pa(&p_first->read);
1171                         privptr->p_read_active_last->r_TIC_2.cda=
1172                                 (__u32)__pa(&p_first->read);
1173                 }
1174                 else {
1175                         /* make sure we update the CCW so channel doesn't   */
1176                         /* fetch it when it is only half done               */
1177                         memcpy( &p_end->read1_nop2, &temp_ccw ,
1178                                 sizeof(struct ccw1));
1179                         privptr->p_read_active_last->r_TIC_1.cda=
1180                                 (__u32)__pa(&p_first->read);
1181                         privptr->p_read_active_last->r_TIC_2.cda=
1182                                 (__u32)__pa(&p_first->read);
1183                 }
1184                 /*      chain in new set of blocks                         */
1185                 privptr->p_read_active_last->next = p_first;
1186                 privptr->p_read_active_last=p_last;
1187         } /* end of if ( privptr-> p_read_active_first ==NULL)  */
1188         CLAW_DBF_TEXT(4, trace, "addexit");
1189         return 0;
1190 }    /*     end of add_claw_reads   */
1191
1192 /*-------------------------------------------------------------------*
1193  *   ccw_check_return_code                                           *
1194  *                                                                   *
1195  *-------------------------------------------------------------------*/
1196
1197 static void
1198 ccw_check_return_code(struct ccw_device *cdev, int return_code)
1199 {
1200         CLAW_DBF_TEXT(4, trace, "ccwret");
1201         if (return_code != 0) {
1202                 switch (return_code) {
1203                 case -EBUSY: /* BUSY is a transient state no action needed */
1204                         break;
1205                 case -ENODEV:
1206                         dev_err(&cdev->dev, "The remote channel adapter is not"
1207                                 " available\n");
1208                         break;
1209                 case -EINVAL:
1210                         dev_err(&cdev->dev,
1211                                 "The status of the remote channel adapter"
1212                                 " is not valid\n");
1213                         break;
1214                 default:
1215                         dev_err(&cdev->dev, "The common device layer"
1216                                 " returned error code %d\n",
1217                                   return_code);
1218                 }
1219         }
1220         CLAW_DBF_TEXT(4, trace, "ccwret");
1221 }    /*    end of ccw_check_return_code   */
1222
1223 /*-------------------------------------------------------------------*
1224 *       ccw_check_unit_check                                         *
1225 *--------------------------------------------------------------------*/
1226
1227 static void
1228 ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
1229 {
1230         struct net_device *ndev = p_ch->ndev;
1231         struct device *dev = &p_ch->cdev->dev;
1232
1233         CLAW_DBF_TEXT(4, trace, "unitchek");
1234         dev_warn(dev, "The communication peer of %s disconnected\n",
1235                 ndev->name);
1236
1237         if (sense & 0x40) {
1238                 if (sense & 0x01) {
1239                         dev_warn(dev, "The remote channel adapter for"
1240                                 " %s has been reset\n",
1241                                 ndev->name);
1242                 }
1243         } else if (sense & 0x20) {
1244                 if (sense & 0x04) {
1245                         dev_warn(dev, "A data streaming timeout occurred"
1246                                 " for %s\n",
1247                                 ndev->name);
1248                 } else if (sense & 0x10) {
1249                         dev_warn(dev, "The remote channel adapter for %s"
1250                                 " is faulty\n",
1251                                 ndev->name);
1252                 } else {
1253                         dev_warn(dev, "A data transfer parity error occurred"
1254                                 " for %s\n",
1255                                 ndev->name);
1256                 }
1257         } else if (sense & 0x10) {
1258                 dev_warn(dev, "A read data parity error occurred"
1259                         " for %s\n",
1260                         ndev->name);
1261         }
1262
1263 }   /*    end of ccw_check_unit_check    */
1264
1265 /*-------------------------------------------------------------------*
1266 *               find_link                                            *
1267 *--------------------------------------------------------------------*/
1268 static int
1269 find_link(struct net_device *dev, char *host_name, char *ws_name )
1270 {
1271         struct claw_privbk *privptr;
1272         struct claw_env *p_env;
1273         int    rc=0;
1274
1275         CLAW_DBF_TEXT(2, setup, "findlink");
1276         privptr = dev->ml_priv;
1277         p_env=privptr->p_env;
1278         switch (p_env->packing)
1279         {
1280                 case  PACKING_ASK:
1281                         if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
1282                             (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
1283                              rc = EINVAL;
1284                         break;
1285                 case  DO_PACKED:
1286                 case  PACK_SEND:
1287                         if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
1288                             (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
1289                                 rc = EINVAL;
1290                         break;
1291                 default:
1292                         if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
1293                             (memcmp(p_env->api_type , ws_name, 8)!=0))
1294                                 rc = EINVAL;
1295                         break;
1296         }
1297
1298         return rc;
1299 }    /*    end of find_link    */
1300
1301 /*-------------------------------------------------------------------*
1302  *   claw_hw_tx                                                      *
1303  *                                                                   *
1304  *                                                                   *
1305  *-------------------------------------------------------------------*/
1306
1307 static int
1308 claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
1309 {
1310         int                             rc=0;
1311         struct claw_privbk              *privptr;
1312         struct ccwbk           *p_this_ccw;
1313         struct ccwbk           *p_first_ccw;
1314         struct ccwbk           *p_last_ccw;
1315         __u32                           numBuffers;
1316         signed long                     len_of_data;
1317         unsigned long                   bytesInThisBuffer;
1318         unsigned char                   *pDataAddress;
1319         struct endccw                   *pEnd;
1320         struct ccw1                     tempCCW;
1321         struct chbk                     *p_ch;
1322         struct claw_env                 *p_env;
1323         int                             lock;
1324         struct clawph                   *pk_head;
1325         struct chbk                     *ch;
1326
1327         CLAW_DBF_TEXT(4, trace, "hw_tx");
1328         privptr = (struct claw_privbk *)(dev->ml_priv);
1329         p_ch = (struct chbk *)&privptr->channel[WRITE_CHANNEL];
1330         p_env =privptr->p_env;
1331         claw_free_wrt_buf(dev); /* Clean up free chain if posible */
1332         /*  scan the write queue to free any completed write packets   */
1333         p_first_ccw=NULL;
1334         p_last_ccw=NULL;
1335         if ((p_env->packing >= PACK_SEND) &&
1336             (skb->cb[1] != 'P')) {
1337                 skb_push(skb,sizeof(struct clawph));
1338                 pk_head=(struct clawph *)skb->data;
1339                 pk_head->len=skb->len-sizeof(struct clawph);
1340                 if (pk_head->len%4)  {
1341                         pk_head->len+= 4-(pk_head->len%4);
1342                         skb_pad(skb,4-(pk_head->len%4));
1343                         skb_put(skb,4-(pk_head->len%4));
1344                 }
1345                 if (p_env->packing == DO_PACKED)
1346                         pk_head->link_num = linkid;
1347                 else
1348                         pk_head->link_num = 0;
1349                 pk_head->flag = 0x00;
1350                 skb_pad(skb,4);
1351                 skb->cb[1] = 'P';
1352         }
1353         if (linkid == 0) {
1354                 if (claw_check_busy(dev)) {
1355                         if (privptr->write_free_count!=0) {
1356                                 claw_clear_busy(dev);
1357                         }
1358                         else {
1359                                 claw_strt_out_IO(dev );
1360                                 claw_free_wrt_buf( dev );
1361                                 if (privptr->write_free_count==0) {
1362                                         ch = &privptr->channel[WRITE_CHANNEL];
1363                                         atomic_inc(&skb->users);
1364                                         skb_queue_tail(&ch->collect_queue, skb);
1365                                         goto Done;
1366                                 }
1367                                 else {
1368                                         claw_clear_busy(dev);
1369                                 }
1370                         }
1371                 }
1372                 /*  tx lock  */
1373                 if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
1374                         ch = &privptr->channel[WRITE_CHANNEL];
1375                         atomic_inc(&skb->users);
1376                         skb_queue_tail(&ch->collect_queue, skb);
1377                         claw_strt_out_IO(dev );
1378                         rc=-EBUSY;
1379                         goto Done2;
1380                 }
1381         }
1382         /*      See how many write buffers are required to hold this data */
1383         numBuffers = DIV_ROUND_UP(skb->len, privptr->p_env->write_size);
1384
1385         /*      If that number of buffers isn't available, give up for now */
1386         if (privptr->write_free_count < numBuffers ||
1387             privptr->p_write_free_chain == NULL ) {
1388
1389                 claw_setbit_busy(TB_NOBUFFER,dev);
1390                 ch = &privptr->channel[WRITE_CHANNEL];
1391                 atomic_inc(&skb->users);
1392                 skb_queue_tail(&ch->collect_queue, skb);
1393                 CLAW_DBF_TEXT(2, trace, "clawbusy");
1394                 goto Done2;
1395         }
1396         pDataAddress=skb->data;
1397         len_of_data=skb->len;
1398
1399         while (len_of_data > 0) {
1400                 p_this_ccw=privptr->p_write_free_chain;  /* get a block */
1401                 if (p_this_ccw == NULL) { /* lost the race */
1402                         ch = &privptr->channel[WRITE_CHANNEL];
1403                         atomic_inc(&skb->users);
1404                         skb_queue_tail(&ch->collect_queue, skb);
1405                         goto Done2;
1406                 }
1407                 privptr->p_write_free_chain=p_this_ccw->next;
1408                 p_this_ccw->next=NULL;
1409                 --privptr->write_free_count; /* -1 */
1410                 if (len_of_data >= privptr->p_env->write_size)
1411                         bytesInThisBuffer = privptr->p_env->write_size;
1412                 else
1413                         bytesInThisBuffer = len_of_data;
1414                 memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
1415                 len_of_data-=bytesInThisBuffer;
1416                 pDataAddress+=(unsigned long)bytesInThisBuffer;
1417                 /*      setup write CCW         */
1418                 p_this_ccw->write.cmd_code = (linkid * 8) +1;
1419                 if (len_of_data>0) {
1420                         p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
1421                 }
1422                 p_this_ccw->write.count=bytesInThisBuffer;
1423                 /*      now add to end of this chain    */
1424                 if (p_first_ccw==NULL)    {
1425                         p_first_ccw=p_this_ccw;
1426                 }
1427                 if (p_last_ccw!=NULL) {
1428                         p_last_ccw->next=p_this_ccw;
1429                         /*      set up TIC ccws         */
1430                         p_last_ccw->w_TIC_1.cda=
1431                                 (__u32)__pa(&p_this_ccw->write);
1432                 }
1433                 p_last_ccw=p_this_ccw;      /* save new last block */
1434         }
1435
1436         /*      FirstCCW and LastCCW now contain a new set of write channel
1437         *       programs to append to the running channel program
1438         */
1439
1440         if (p_first_ccw!=NULL) {
1441                 /*      setup ending ccw sequence for this segment           */
1442                 pEnd=privptr->p_end_ccw;
1443                 if (pEnd->write1) {
1444                         pEnd->write1=0x00;   /* second end ccw is now active */
1445                         /*      set up Tic CCWs         */
1446                         p_last_ccw->w_TIC_1.cda=
1447                                 (__u32)__pa(&pEnd->write2_nop1);
1448                         pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1449                         pEnd->write2_nop2.flags    =
1450                                 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1451                         pEnd->write2_nop2.cda=0;
1452                         pEnd->write2_nop2.count=1;
1453                 }
1454                 else {  /*  end of if (pEnd->write1)*/
1455                         pEnd->write1=0x01;   /* first end ccw is now active */
1456                         /*      set up Tic CCWs         */
1457                         p_last_ccw->w_TIC_1.cda=
1458                                 (__u32)__pa(&pEnd->write1_nop1);
1459                         pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1460                         pEnd->write1_nop2.flags    =
1461                                 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1462                         pEnd->write1_nop2.cda=0;
1463                         pEnd->write1_nop2.count=1;
1464                 }  /* end if if (pEnd->write1) */
1465
1466                 if (privptr->p_write_active_first==NULL ) {
1467                         privptr->p_write_active_first=p_first_ccw;
1468                         privptr->p_write_active_last=p_last_ccw;
1469                 }
1470                 else {
1471                         /*      set up Tic CCWs         */
1472
1473                         tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
1474                         tempCCW.count=0;
1475                         tempCCW.flags=0;
1476                         tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
1477
1478                         if (pEnd->write1) {
1479
1480                  /*
1481                  * first set of ending CCW's is chained to the new write
1482                  * chain, so the second set is chained to the active chain
1483                  * Therefore modify the second set to point the new write chain.
1484                  * make sure we update the CCW atomically
1485                  * so channel does not fetch it when it's only half done
1486                  */
1487                                 memcpy( &pEnd->write2_nop2, &tempCCW ,
1488                                         sizeof(struct ccw1));
1489                                 privptr->p_write_active_last->w_TIC_1.cda=
1490                                         (__u32)__pa(&p_first_ccw->write);
1491                         }
1492                         else {
1493
1494                         /*make sure we update the CCW atomically
1495                          *so channel does not fetch it when it's only half done
1496                          */
1497                                 memcpy(&pEnd->write1_nop2, &tempCCW ,
1498                                         sizeof(struct ccw1));
1499                                 privptr->p_write_active_last->w_TIC_1.cda=
1500                                         (__u32)__pa(&p_first_ccw->write);
1501
1502                         } /* end if if (pEnd->write1) */
1503
1504                         privptr->p_write_active_last->next=p_first_ccw;
1505                         privptr->p_write_active_last=p_last_ccw;
1506                 }
1507
1508         } /* endif (p_first_ccw!=NULL)  */
1509         dev_kfree_skb_any(skb);
1510         if (linkid==0) {
1511                 lock=LOCK_NO;
1512         }
1513         else  {
1514                 lock=LOCK_YES;
1515         }
1516         claw_strt_out_IO(dev );
1517         /*      if write free count is zero , set NOBUFFER       */
1518         if (privptr->write_free_count==0) {
1519                 claw_setbit_busy(TB_NOBUFFER,dev);
1520         }
1521 Done2:
1522         claw_clearbit_busy(TB_TX,dev);
1523 Done:
1524         return(rc);
1525 }    /*    end of claw_hw_tx    */
1526
1527 /*-------------------------------------------------------------------*
1528 *                                                                    *
1529 *     init_ccw_bk                                                    *
1530 *                                                                    *
1531 *--------------------------------------------------------------------*/
1532
1533 static int
1534 init_ccw_bk(struct net_device *dev)
1535 {
1536
1537         __u32   ccw_blocks_required;
1538         __u32   ccw_blocks_perpage;
1539         __u32   ccw_pages_required;
1540         __u32   claw_reads_perpage=1;
1541         __u32   claw_read_pages;
1542         __u32   claw_writes_perpage=1;
1543         __u32   claw_write_pages;
1544         void    *p_buff=NULL;
1545         struct ccwbk*p_free_chain;
1546         struct ccwbk*p_buf;
1547         struct ccwbk*p_last_CCWB;
1548         struct ccwbk*p_first_CCWB;
1549         struct endccw *p_endccw=NULL;
1550         addr_t  real_address;
1551         struct claw_privbk *privptr = dev->ml_priv;
1552         struct clawh *pClawH=NULL;
1553         addr_t   real_TIC_address;
1554         int i,j;
1555         CLAW_DBF_TEXT(4, trace, "init_ccw");
1556
1557         /*  initialize  statistics field */
1558         privptr->active_link_ID=0;
1559         /*  initialize  ccwbk pointers  */
1560         privptr->p_write_free_chain=NULL;   /* pointer to free ccw chain*/
1561         privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
1562         privptr->p_write_active_last=NULL;  /* pointer to the last write ccw*/
1563         privptr->p_read_active_first=NULL;  /* pointer to the first read ccw*/
1564         privptr->p_read_active_last=NULL;   /* pointer to the last read ccw */
1565         privptr->p_end_ccw=NULL;            /* pointer to ending ccw        */
1566         privptr->p_claw_signal_blk=NULL;    /* pointer to signal block      */
1567         privptr->buffs_alloc = 0;
1568         memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
1569         memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
1570         /*  initialize  free write ccwbk counter  */
1571         privptr->write_free_count=0;  /* number of free bufs on write chain */
1572         p_last_CCWB = NULL;
1573         p_first_CCWB= NULL;
1574         /*
1575         *  We need 1 CCW block for each read buffer, 1 for each
1576         *  write buffer, plus 1 for ClawSignalBlock
1577         */
1578         ccw_blocks_required =
1579                 privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
1580         /*
1581         * compute number of CCW blocks that will fit in a page
1582         */
1583         ccw_blocks_perpage= PAGE_SIZE /  CCWBK_SIZE;
1584         ccw_pages_required=
1585                 DIV_ROUND_UP(ccw_blocks_required, ccw_blocks_perpage);
1586
1587         /*
1588          *  read and write sizes are set by 2 constants in claw.h
1589          *  4k and 32k.  Unpacked values other than 4k are not going to
1590          * provide good performance. With packing buffers support 32k
1591          * buffers are used.
1592          */
1593         if (privptr->p_env->read_size < PAGE_SIZE) {
1594                 claw_reads_perpage = PAGE_SIZE / privptr->p_env->read_size;
1595                 claw_read_pages = DIV_ROUND_UP(privptr->p_env->read_buffers,
1596                                                 claw_reads_perpage);
1597          }
1598          else {       /* > or equal  */
1599                 privptr->p_buff_pages_perread =
1600                         DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
1601                 claw_read_pages = privptr->p_env->read_buffers *
1602                                         privptr->p_buff_pages_perread;
1603          }
1604         if (privptr->p_env->write_size < PAGE_SIZE) {
1605                 claw_writes_perpage =
1606                         PAGE_SIZE / privptr->p_env->write_size;
1607                 claw_write_pages = DIV_ROUND_UP(privptr->p_env->write_buffers,
1608                                                 claw_writes_perpage);
1609
1610         }
1611         else {      /* >  or equal  */
1612                 privptr->p_buff_pages_perwrite =
1613                         DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
1614                 claw_write_pages = privptr->p_env->write_buffers *
1615                                         privptr->p_buff_pages_perwrite;
1616         }
1617         /*
1618         *               allocate ccw_pages_required
1619         */
1620         if (privptr->p_buff_ccw==NULL) {
1621                 privptr->p_buff_ccw=
1622                         (void *)__get_free_pages(__GFP_DMA,
1623                         (int)pages_to_order_of_mag(ccw_pages_required ));
1624                 if (privptr->p_buff_ccw==NULL) {
1625                         return -ENOMEM;
1626                 }
1627                 privptr->p_buff_ccw_num=ccw_pages_required;
1628         }
1629         memset(privptr->p_buff_ccw, 0x00,
1630                 privptr->p_buff_ccw_num * PAGE_SIZE);
1631
1632         /*
1633         *               obtain ending ccw block address
1634         *
1635         */
1636         privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
1637         real_address  = (__u32)__pa(privptr->p_end_ccw);
1638         /*                              Initialize ending CCW block       */
1639         p_endccw=privptr->p_end_ccw;
1640         p_endccw->real=real_address;
1641         p_endccw->write1=0x00;
1642         p_endccw->read1=0x00;
1643
1644         /*      write1_nop1                                     */
1645         p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1646         p_endccw->write1_nop1.flags       = CCW_FLAG_SLI | CCW_FLAG_CC;
1647         p_endccw->write1_nop1.count       = 1;
1648         p_endccw->write1_nop1.cda         = 0;
1649
1650         /*      write1_nop2                                     */
1651         p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1652         p_endccw->write1_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1653         p_endccw->write1_nop2.count      = 1;
1654         p_endccw->write1_nop2.cda        = 0;
1655
1656         /*      write2_nop1                                     */
1657         p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1658         p_endccw->write2_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
1659         p_endccw->write2_nop1.count        = 1;
1660         p_endccw->write2_nop1.cda          = 0;
1661
1662         /*      write2_nop2                                     */
1663         p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1664         p_endccw->write2_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1665         p_endccw->write2_nop2.count        = 1;
1666         p_endccw->write2_nop2.cda          = 0;
1667
1668         /*      read1_nop1                                      */
1669         p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1670         p_endccw->read1_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
1671         p_endccw->read1_nop1.count        = 1;
1672         p_endccw->read1_nop1.cda          = 0;
1673
1674         /*      read1_nop2                                      */
1675         p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1676         p_endccw->read1_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1677         p_endccw->read1_nop2.count        = 1;
1678         p_endccw->read1_nop2.cda          = 0;
1679
1680         /*      read2_nop1                                      */
1681         p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1682         p_endccw->read2_nop1.flags        = CCW_FLAG_SLI | CCW_FLAG_CC;
1683         p_endccw->read2_nop1.count        = 1;
1684         p_endccw->read2_nop1.cda          = 0;
1685
1686         /*      read2_nop2                                      */
1687         p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1688         p_endccw->read2_nop2.flags        = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1689         p_endccw->read2_nop2.count        = 1;
1690         p_endccw->read2_nop2.cda          = 0;
1691
1692         /*
1693         *                               Build a chain of CCWs
1694         *
1695         */
1696         p_buff=privptr->p_buff_ccw;
1697
1698         p_free_chain=NULL;
1699         for (i=0 ; i < ccw_pages_required; i++ ) {
1700                 real_address  = (__u32)__pa(p_buff);
1701                 p_buf=p_buff;
1702                 for (j=0 ; j < ccw_blocks_perpage ; j++) {
1703                         p_buf->next  = p_free_chain;
1704                         p_free_chain = p_buf;
1705                         p_buf->real=(__u32)__pa(p_buf);
1706                         ++p_buf;
1707                 }
1708                 p_buff+=PAGE_SIZE;
1709         }
1710         /*
1711         *                               Initialize ClawSignalBlock
1712         *
1713         */
1714         if (privptr->p_claw_signal_blk==NULL) {
1715                 privptr->p_claw_signal_blk=p_free_chain;
1716                 p_free_chain=p_free_chain->next;
1717                 pClawH=(struct clawh *)privptr->p_claw_signal_blk;
1718                 pClawH->length=0xffff;
1719                 pClawH->opcode=0xff;
1720                 pClawH->flag=CLAW_BUSY;
1721         }
1722
1723         /*
1724         *               allocate write_pages_required and add to free chain
1725         */
1726         if (privptr->p_buff_write==NULL) {
1727             if (privptr->p_env->write_size < PAGE_SIZE) {
1728                 privptr->p_buff_write=
1729                         (void *)__get_free_pages(__GFP_DMA,
1730                         (int)pages_to_order_of_mag(claw_write_pages ));
1731                 if (privptr->p_buff_write==NULL) {
1732                         privptr->p_buff_ccw=NULL;
1733                         return -ENOMEM;
1734                 }
1735                 /*
1736                 *                               Build CLAW write free chain
1737                 *
1738                 */
1739
1740                 memset(privptr->p_buff_write, 0x00,
1741                         ccw_pages_required * PAGE_SIZE);
1742                 privptr->p_write_free_chain=NULL;
1743
1744                 p_buff=privptr->p_buff_write;
1745
1746                 for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
1747                         p_buf        = p_free_chain;      /*  get a CCW */
1748                         p_free_chain = p_buf->next;
1749                         p_buf->next  =privptr->p_write_free_chain;
1750                         privptr->p_write_free_chain = p_buf;
1751                         p_buf-> p_buffer        = (struct clawbuf *)p_buff;
1752                         p_buf-> write.cda       = (__u32)__pa(p_buff);
1753                         p_buf-> write.flags     = CCW_FLAG_SLI | CCW_FLAG_CC;
1754                         p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1755                         p_buf-> w_read_FF.flags   = CCW_FLAG_SLI | CCW_FLAG_CC;
1756                         p_buf-> w_read_FF.count   = 1;
1757                         p_buf-> w_read_FF.cda     =
1758                                 (__u32)__pa(&p_buf-> header.flag);
1759                         p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1760                         p_buf-> w_TIC_1.flags      = 0;
1761                         p_buf-> w_TIC_1.count      = 0;
1762
1763                         if (((unsigned long)p_buff +
1764                                             privptr->p_env->write_size) >=
1765                            ((unsigned long)(p_buff+2*
1766                             (privptr->p_env->write_size) - 1) & PAGE_MASK)) {
1767                                 p_buff = p_buff+privptr->p_env->write_size;
1768                         }
1769                 }
1770            }
1771            else      /*  Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
1772            {
1773                privptr->p_write_free_chain=NULL;
1774                for (i = 0; i< privptr->p_env->write_buffers ; i++) {
1775                    p_buff=(void *)__get_free_pages(__GFP_DMA,
1776                         (int)pages_to_order_of_mag(
1777                         privptr->p_buff_pages_perwrite) );
1778                    if (p_buff==NULL) {
1779                         free_pages((unsigned long)privptr->p_buff_ccw,
1780                               (int)pages_to_order_of_mag(
1781                                         privptr->p_buff_ccw_num));
1782                         privptr->p_buff_ccw=NULL;
1783                         p_buf=privptr->p_buff_write;
1784                         while (p_buf!=NULL) {
1785                                 free_pages((unsigned long)
1786                                         p_buf->p_buffer,
1787                                         (int)pages_to_order_of_mag(
1788                                         privptr->p_buff_pages_perwrite));
1789                                 p_buf=p_buf->next;
1790                         }
1791                         return -ENOMEM;
1792                    }  /* Error on get_pages   */
1793                    memset(p_buff, 0x00, privptr->p_env->write_size );
1794                    p_buf         = p_free_chain;
1795                    p_free_chain  = p_buf->next;
1796                    p_buf->next   = privptr->p_write_free_chain;
1797                    privptr->p_write_free_chain = p_buf;
1798                    privptr->p_buff_write = p_buf;
1799                    p_buf->p_buffer=(struct clawbuf *)p_buff;
1800                    p_buf-> write.cda     = (__u32)__pa(p_buff);
1801                    p_buf-> write.flags   = CCW_FLAG_SLI | CCW_FLAG_CC;
1802                    p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1803                    p_buf-> w_read_FF.flags    = CCW_FLAG_SLI | CCW_FLAG_CC;
1804                    p_buf-> w_read_FF.count    = 1;
1805                    p_buf-> w_read_FF.cda      =
1806                         (__u32)__pa(&p_buf-> header.flag);
1807                    p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1808                    p_buf-> w_TIC_1.flags   = 0;
1809                    p_buf-> w_TIC_1.count   = 0;
1810                }  /* for all write_buffers   */
1811
1812            }    /* else buffers are PAGE_SIZE or bigger */
1813
1814         }
1815         privptr->p_buff_write_num=claw_write_pages;
1816         privptr->write_free_count=privptr->p_env->write_buffers;
1817
1818
1819         /*
1820         *               allocate read_pages_required and chain to free chain
1821         */
1822         if (privptr->p_buff_read==NULL) {
1823             if (privptr->p_env->read_size < PAGE_SIZE)  {
1824                 privptr->p_buff_read=
1825                         (void *)__get_free_pages(__GFP_DMA,
1826                         (int)pages_to_order_of_mag(claw_read_pages) );
1827                 if (privptr->p_buff_read==NULL) {
1828                         free_pages((unsigned long)privptr->p_buff_ccw,
1829                                 (int)pages_to_order_of_mag(
1830                                         privptr->p_buff_ccw_num));
1831                         /* free the write pages size is < page size  */
1832                         free_pages((unsigned long)privptr->p_buff_write,
1833                                 (int)pages_to_order_of_mag(
1834                                 privptr->p_buff_write_num));
1835                         privptr->p_buff_ccw=NULL;
1836                         privptr->p_buff_write=NULL;
1837                         return -ENOMEM;
1838                 }
1839                 memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
1840                 privptr->p_buff_read_num=claw_read_pages;
1841                 /*
1842                 *                               Build CLAW read free chain
1843                 *
1844                 */
1845                 p_buff=privptr->p_buff_read;
1846                 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
1847                         p_buf        = p_free_chain;
1848                         p_free_chain = p_buf->next;
1849
1850                         if (p_last_CCWB==NULL) {
1851                                 p_buf->next=NULL;
1852                                 real_TIC_address=0;
1853                                 p_last_CCWB=p_buf;
1854                         }
1855                         else {
1856                                 p_buf->next=p_first_CCWB;
1857                                 real_TIC_address=
1858                                 (__u32)__pa(&p_first_CCWB -> read );
1859                         }
1860
1861                         p_first_CCWB=p_buf;
1862
1863                         p_buf->p_buffer=(struct clawbuf *)p_buff;
1864                         /*  initialize read command */
1865                         p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
1866                         p_buf-> read.cda = (__u32)__pa(p_buff);
1867                         p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1868                         p_buf-> read.count       = privptr->p_env->read_size;
1869
1870                         /*  initialize read_h command */
1871                         p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
1872                         p_buf-> read_h.cda =
1873                                 (__u32)__pa(&(p_buf->header));
1874                         p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1875                         p_buf-> read_h.count      = sizeof(struct clawh);
1876
1877                         /*  initialize Signal command */
1878                         p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
1879                         p_buf-> signal.cda =
1880                                 (__u32)__pa(&(pClawH->flag));
1881                         p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1882                         p_buf-> signal.count     = 1;
1883
1884                         /*  initialize r_TIC_1 command */
1885                         p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1886                         p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
1887                         p_buf-> r_TIC_1.flags = 0;
1888                         p_buf-> r_TIC_1.count      = 0;
1889
1890                         /*  initialize r_read_FF command */
1891                         p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1892                         p_buf-> r_read_FF.cda =
1893                                 (__u32)__pa(&(pClawH->flag));
1894                         p_buf-> r_read_FF.flags =
1895                                 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
1896                         p_buf-> r_read_FF.count    = 1;
1897
1898                         /*    initialize r_TIC_2          */
1899                         memcpy(&p_buf->r_TIC_2,
1900                                 &p_buf->r_TIC_1, sizeof(struct ccw1));
1901
1902                         /*     initialize Header     */
1903                         p_buf->header.length=0xffff;
1904                         p_buf->header.opcode=0xff;
1905                         p_buf->header.flag=CLAW_PENDING;
1906
1907                         if (((unsigned long)p_buff+privptr->p_env->read_size) >=
1908                           ((unsigned long)(p_buff+2*(privptr->p_env->read_size)
1909                                  -1)
1910                            & PAGE_MASK)) {
1911                                 p_buff= p_buff+privptr->p_env->read_size;
1912                         }
1913                         else {
1914                                 p_buff=
1915                                 (void *)((unsigned long)
1916                                         (p_buff+2*(privptr->p_env->read_size)-1)
1917                                          & PAGE_MASK) ;
1918                         }
1919                 }   /* for read_buffers   */
1920           }         /* read_size < PAGE_SIZE  */
1921           else {  /* read Size >= PAGE_SIZE  */
1922                 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
1923                         p_buff = (void *)__get_free_pages(__GFP_DMA,
1924                                 (int)pages_to_order_of_mag(
1925                                         privptr->p_buff_pages_perread));
1926                         if (p_buff==NULL) {
1927                                 free_pages((unsigned long)privptr->p_buff_ccw,
1928                                         (int)pages_to_order_of_mag(privptr->
1929                                         p_buff_ccw_num));
1930                                 /* free the write pages  */
1931                                 p_buf=privptr->p_buff_write;
1932                                 while (p_buf!=NULL) {
1933                                         free_pages(
1934                                             (unsigned long)p_buf->p_buffer,
1935                                             (int)pages_to_order_of_mag(
1936                                             privptr->p_buff_pages_perwrite));
1937                                         p_buf=p_buf->next;
1938                                 }
1939                                 /* free any read pages already alloc  */
1940                                 p_buf=privptr->p_buff_read;
1941                                 while (p_buf!=NULL) {
1942                                         free_pages(
1943                                             (unsigned long)p_buf->p_buffer,
1944                                             (int)pages_to_order_of_mag(
1945                                              privptr->p_buff_pages_perread));
1946                                         p_buf=p_buf->next;
1947                                 }
1948                                 privptr->p_buff_ccw=NULL;
1949                                 privptr->p_buff_write=NULL;
1950                                 return -ENOMEM;
1951                         }
1952                         memset(p_buff, 0x00, privptr->p_env->read_size);
1953                         p_buf        = p_free_chain;
1954                         privptr->p_buff_read = p_buf;
1955                         p_free_chain = p_buf->next;
1956
1957                         if (p_last_CCWB==NULL) {
1958                                 p_buf->next=NULL;
1959                                 real_TIC_address=0;
1960                                 p_last_CCWB=p_buf;
1961                         }
1962                         else {
1963                                 p_buf->next=p_first_CCWB;
1964                                 real_TIC_address=
1965                                         (addr_t)__pa(
1966                                                 &p_first_CCWB -> read );
1967                         }
1968
1969                         p_first_CCWB=p_buf;
1970                                 /* save buff address */
1971                         p_buf->p_buffer=(struct clawbuf *)p_buff;
1972                         /*  initialize read command */
1973                         p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
1974                         p_buf-> read.cda = (__u32)__pa(p_buff);
1975                         p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1976                         p_buf-> read.count       = privptr->p_env->read_size;
1977
1978                         /*  initialize read_h command */
1979                         p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
1980                         p_buf-> read_h.cda =
1981                                 (__u32)__pa(&(p_buf->header));
1982                         p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1983                         p_buf-> read_h.count      = sizeof(struct clawh);
1984
1985                         /*  initialize Signal command */
1986                         p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
1987                         p_buf-> signal.cda =
1988                                 (__u32)__pa(&(pClawH->flag));
1989                         p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1990                         p_buf-> signal.count     = 1;
1991
1992                         /*  initialize r_TIC_1 command */
1993                         p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1994                         p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
1995                         p_buf-> r_TIC_1.flags = 0;
1996                         p_buf-> r_TIC_1.count      = 0;
1997
1998                         /*  initialize r_read_FF command */
1999                         p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2000                         p_buf-> r_read_FF.cda =
2001                                 (__u32)__pa(&(pClawH->flag));
2002                         p_buf-> r_read_FF.flags =
2003                                 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
2004                         p_buf-> r_read_FF.count    = 1;
2005
2006                         /*    initialize r_TIC_2          */
2007                         memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
2008                                 sizeof(struct ccw1));
2009
2010                         /*     initialize Header     */
2011                         p_buf->header.length=0xffff;
2012                         p_buf->header.opcode=0xff;
2013                         p_buf->header.flag=CLAW_PENDING;
2014
2015                 }    /* For read_buffers   */
2016           }     /*  read_size >= PAGE_SIZE   */
2017         }       /*  pBuffread = NULL */
2018         add_claw_reads( dev  ,p_first_CCWB , p_last_CCWB);
2019         privptr->buffs_alloc = 1;
2020
2021         return 0;
2022 }    /*    end of init_ccw_bk */
2023
2024 /*-------------------------------------------------------------------*
2025 *                                                                    *
2026 *       probe_error                                                  *
2027 *                                                                    *
2028 *--------------------------------------------------------------------*/
2029
2030 static void
2031 probe_error( struct ccwgroup_device *cgdev)
2032 {
2033         struct claw_privbk *privptr;
2034
2035         CLAW_DBF_TEXT(4, trace, "proberr");
2036         privptr = dev_get_drvdata(&cgdev->dev);
2037         if (privptr != NULL) {
2038                 dev_set_drvdata(&cgdev->dev, NULL);
2039                 kfree(privptr->p_env);
2040                 kfree(privptr->p_mtc_envelope);
2041                 kfree(privptr);
2042         }
2043 }    /*    probe_error    */
2044
2045 /*-------------------------------------------------------------------*
2046 *    claw_process_control                                            *
2047 *                                                                    *
2048 *                                                                    *
2049 *--------------------------------------------------------------------*/
2050
2051 static int
2052 claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
2053 {
2054
2055         struct clawbuf *p_buf;
2056         struct clawctl  ctlbk;
2057         struct clawctl *p_ctlbk;
2058         char    temp_host_name[8];
2059         char    temp_ws_name[8];
2060         struct claw_privbk *privptr;
2061         struct claw_env *p_env;
2062         struct sysval *p_sysval;
2063         struct conncmd *p_connect=NULL;
2064         int rc;
2065         struct chbk *p_ch = NULL;
2066         struct device *tdev;
2067         CLAW_DBF_TEXT(2, setup, "clw_cntl");
2068         udelay(1000);  /* Wait a ms for the control packets to
2069                         *catch up to each other */
2070         privptr = dev->ml_priv;
2071         p_env=privptr->p_env;
2072         tdev = &privptr->channel[READ_CHANNEL].cdev->dev;
2073         memcpy( &temp_host_name, p_env->host_name, 8);
2074         memcpy( &temp_ws_name, p_env->adapter_name , 8);
2075         dev_info(tdev, "%s: CLAW device %.8s: "
2076                 "Received Control Packet\n",
2077                 dev->name, temp_ws_name);
2078         if (privptr->release_pend==1) {
2079                 return 0;
2080         }
2081         p_buf=p_ccw->p_buffer;
2082         p_ctlbk=&ctlbk;
2083         if (p_env->packing == DO_PACKED) { /* packing in progress?*/
2084                 memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
2085         } else {
2086                 memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
2087         }
2088         switch (p_ctlbk->command)
2089         {
2090         case SYSTEM_VALIDATE_REQUEST:
2091                 if (p_ctlbk->version != CLAW_VERSION_ID) {
2092                         claw_snd_sys_validate_rsp(dev, p_ctlbk,
2093                                 CLAW_RC_WRONG_VERSION);
2094                         dev_warn(tdev, "The communication peer of %s"
2095                                 " uses an incorrect API version %d\n",
2096                                 dev->name, p_ctlbk->version);
2097                 }
2098                 p_sysval = (struct sysval *)&(p_ctlbk->data);
2099                 dev_info(tdev, "%s: Recv Sys Validate Request: "
2100                         "Vers=%d,link_id=%d,Corr=%d,WS name=%.8s,"
2101                         "Host name=%.8s\n",
2102                         dev->name, p_ctlbk->version,
2103                         p_ctlbk->linkid,
2104                         p_ctlbk->correlator,
2105                         p_sysval->WS_name,
2106                         p_sysval->host_name);
2107                 if (memcmp(temp_host_name, p_sysval->host_name, 8)) {
2108                         claw_snd_sys_validate_rsp(dev, p_ctlbk,
2109                                 CLAW_RC_NAME_MISMATCH);
2110                         CLAW_DBF_TEXT(2, setup, "HSTBAD");
2111                         CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->host_name);
2112                         CLAW_DBF_TEXT_(2, setup, "%s", temp_host_name);
2113                         dev_warn(tdev,
2114                                 "Host name %s for %s does not match the"
2115                                 " remote adapter name %s\n",
2116                                 p_sysval->host_name,
2117                                 dev->name,
2118                                 temp_host_name);
2119                 }
2120                 if (memcmp(temp_ws_name, p_sysval->WS_name, 8)) {
2121                         claw_snd_sys_validate_rsp(dev, p_ctlbk,
2122                                 CLAW_RC_NAME_MISMATCH);
2123                         CLAW_DBF_TEXT(2, setup, "WSNBAD");
2124                         CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->WS_name);
2125                         CLAW_DBF_TEXT_(2, setup, "%s", temp_ws_name);
2126                         dev_warn(tdev, "Adapter name %s for %s does not match"
2127                                 " the remote host name %s\n",
2128                                 p_sysval->WS_name,
2129                                 dev->name,
2130                                 temp_ws_name);
2131                 }
2132                 if ((p_sysval->write_frame_size < p_env->write_size) &&
2133                     (p_env->packing == 0)) {
2134                         claw_snd_sys_validate_rsp(dev, p_ctlbk,
2135                                 CLAW_RC_HOST_RCV_TOO_SMALL);
2136                         dev_warn(tdev,
2137                                 "The local write buffer is smaller than the"
2138                                 " remote read buffer\n");
2139                         CLAW_DBF_TEXT(2, setup, "wrtszbad");
2140                 }
2141                 if ((p_sysval->read_frame_size < p_env->read_size) &&
2142                     (p_env->packing == 0)) {
2143                         claw_snd_sys_validate_rsp(dev, p_ctlbk,
2144                                 CLAW_RC_HOST_RCV_TOO_SMALL);
2145                         dev_warn(tdev,
2146                                 "The local read buffer is smaller than the"
2147                                 " remote write buffer\n");
2148                         CLAW_DBF_TEXT(2, setup, "rdsizbad");
2149                 }
2150                 claw_snd_sys_validate_rsp(dev, p_ctlbk, 0);
2151                 dev_info(tdev,
2152                         "CLAW device %.8s: System validate"
2153                         " completed.\n", temp_ws_name);
2154                 dev_info(tdev,
2155                         "%s: sys Validate Rsize:%d Wsize:%d\n",
2156                         dev->name, p_sysval->read_frame_size,
2157                         p_sysval->write_frame_size);
2158                 privptr->system_validate_comp = 1;
2159                 if (strncmp(p_env->api_type, WS_APPL_NAME_PACKED, 6) == 0)
2160                         p_env->packing = PACKING_ASK;
2161                 claw_strt_conn_req(dev);
2162                 break;
2163         case SYSTEM_VALIDATE_RESPONSE:
2164                 p_sysval = (struct sysval *)&(p_ctlbk->data);
2165                 dev_info(tdev,
2166                         "Settings for %s validated (version=%d, "
2167                         "remote device=%d, rc=%d, adapter name=%.8s, "
2168                         "host name=%.8s)\n",
2169                         dev->name,
2170                         p_ctlbk->version,
2171                         p_ctlbk->correlator,
2172                         p_ctlbk->rc,
2173                         p_sysval->WS_name,
2174                         p_sysval->host_name);
2175                 switch (p_ctlbk->rc) {
2176                 case 0:
2177                         dev_info(tdev, "%s: CLAW device "
2178                                 "%.8s: System validate completed.\n",
2179                                 dev->name, temp_ws_name);
2180                         if (privptr->system_validate_comp == 0)
2181                                 claw_strt_conn_req(dev);
2182                         privptr->system_validate_comp = 1;
2183                         break;
2184                 case CLAW_RC_NAME_MISMATCH:
2185                         dev_warn(tdev, "Validating %s failed because of"
2186                                 " a host or adapter name mismatch\n",
2187                                 dev->name);
2188                         break;
2189                 case CLAW_RC_WRONG_VERSION:
2190                         dev_warn(tdev, "Validating %s failed because of a"
2191                                 " version conflict\n",
2192                                 dev->name);
2193                         break;
2194                 case CLAW_RC_HOST_RCV_TOO_SMALL:
2195                         dev_warn(tdev, "Validating %s failed because of a"
2196                                 " frame size conflict\n",
2197                                 dev->name);
2198                         break;
2199                 default:
2200                         dev_warn(tdev, "The communication peer of %s rejected"
2201                                 " the connection\n",
2202                                  dev->name);
2203                         break;
2204                 }
2205                 break;
2206
2207         case CONNECTION_REQUEST:
2208                 p_connect = (struct conncmd *)&(p_ctlbk->data);
2209                 dev_info(tdev, "%s: Recv Conn Req: Vers=%d,link_id=%d,"
2210                         "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
2211                         dev->name,
2212                         p_ctlbk->version,
2213                         p_ctlbk->linkid,
2214                         p_ctlbk->correlator,
2215                         p_connect->host_name,
2216                         p_connect->WS_name);
2217                 if (privptr->active_link_ID != 0) {
2218                         claw_snd_disc(dev, p_ctlbk);
2219                         dev_info(tdev, "%s rejected a connection request"
2220                                 " because it is already active\n",
2221                                 dev->name);
2222                 }
2223                 if (p_ctlbk->linkid != 1) {
2224                         claw_snd_disc(dev, p_ctlbk);
2225                         dev_info(tdev, "%s rejected a request to open multiple"
2226                                 " connections\n",
2227                                 dev->name);
2228                 }
2229                 rc = find_link(dev, p_connect->host_name, p_connect->WS_name);
2230                 if (rc != 0) {
2231                         claw_snd_disc(dev, p_ctlbk);
2232                         dev_info(tdev, "%s rejected a connection request"
2233                                 " because of a type mismatch\n",
2234                                 dev->name);
2235                 }
2236                 claw_send_control(dev,
2237                         CONNECTION_CONFIRM, p_ctlbk->linkid,
2238                         p_ctlbk->correlator,
2239                         0, p_connect->host_name,
2240                         p_connect->WS_name);
2241                 if (p_env->packing == PACKING_ASK) {
2242                         p_env->packing = PACK_SEND;
2243                         claw_snd_conn_req(dev, 0);
2244                 }
2245                 dev_info(tdev, "%s: CLAW device %.8s: Connection "
2246                         "completed link_id=%d.\n",
2247                         dev->name, temp_ws_name,
2248                         p_ctlbk->linkid);
2249                         privptr->active_link_ID = p_ctlbk->linkid;
2250                         p_ch = &privptr->channel[WRITE_CHANNEL];
2251                         wake_up(&p_ch->wait);  /* wake up claw_open ( WRITE) */
2252                 break;
2253         case CONNECTION_RESPONSE:
2254                 p_connect = (struct conncmd *)&(p_ctlbk->data);
2255                 dev_info(tdev, "%s: Recv Conn Resp: Vers=%d,link_id=%d,"
2256                         "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
2257                         dev->name,
2258                         p_ctlbk->version,
2259                         p_ctlbk->linkid,
2260                         p_ctlbk->correlator,
2261                         p_ctlbk->rc,
2262                         p_connect->host_name,
2263                         p_connect->WS_name);
2264
2265                 if (p_ctlbk->rc != 0) {
2266                         dev_warn(tdev, "The communication peer of %s rejected"
2267                                 " a connection request\n",
2268                                 dev->name);
2269                         return 1;
2270                 }
2271                 rc = find_link(dev,
2272                         p_connect->host_name, p_connect->WS_name);
2273                 if (rc != 0) {
2274                         claw_snd_disc(dev, p_ctlbk);
2275                         dev_warn(tdev, "The communication peer of %s"
2276                                 " rejected a connection "
2277                                 "request because of a type mismatch\n",
2278                                  dev->name);
2279                 }
2280                 /* should be until CONNECTION_CONFIRM */
2281                 privptr->active_link_ID = -(p_ctlbk->linkid);
2282                 break;
2283         case CONNECTION_CONFIRM:
2284                 p_connect = (struct conncmd *)&(p_ctlbk->data);
2285                 dev_info(tdev,
2286                         "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
2287                         "Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
2288                         dev->name,
2289                         p_ctlbk->version,
2290                         p_ctlbk->linkid,
2291                         p_ctlbk->correlator,
2292                         p_connect->host_name,
2293                         p_connect->WS_name);
2294                 if (p_ctlbk->linkid == -(privptr->active_link_ID)) {
2295                         privptr->active_link_ID = p_ctlbk->linkid;
2296                         if (p_env->packing > PACKING_ASK) {
2297                                 dev_info(tdev,
2298                                 "%s: Confirmed Now packing\n", dev->name);
2299                                 p_env->packing = DO_PACKED;
2300                         }
2301                         p_ch = &privptr->channel[WRITE_CHANNEL];
2302                         wake_up(&p_ch->wait);
2303                 } else {
2304                         dev_warn(tdev, "Activating %s failed because of"
2305                                 " an incorrect link ID=%d\n",
2306                                 dev->name, p_ctlbk->linkid);
2307                         claw_snd_disc(dev, p_ctlbk);
2308                 }
2309                 break;
2310         case DISCONNECT:
2311                 dev_info(tdev, "%s: Disconnect: "
2312                         "Vers=%d,link_id=%d,Corr=%d\n",
2313                         dev->name, p_ctlbk->version,
2314                         p_ctlbk->linkid, p_ctlbk->correlator);
2315                 if ((p_ctlbk->linkid == 2) &&
2316                     (p_env->packing == PACK_SEND)) {
2317                         privptr->active_link_ID = 1;
2318                         p_env->packing = DO_PACKED;
2319                 } else
2320                         privptr->active_link_ID = 0;
2321                 break;
2322         case CLAW_ERROR:
2323                 dev_warn(tdev, "The communication peer of %s failed\n",
2324                         dev->name);
2325                 break;
2326         default:
2327                 dev_warn(tdev, "The communication peer of %s sent"
2328                         " an unknown command code\n",
2329                         dev->name);
2330                 break;
2331         }
2332
2333         return 0;
2334 }   /*    end of claw_process_control    */
2335
2336
2337 /*-------------------------------------------------------------------*
2338 *               claw_send_control                                    *
2339 *                                                                    *
2340 *--------------------------------------------------------------------*/
2341
2342 static int
2343 claw_send_control(struct net_device *dev, __u8 type, __u8 link,
2344          __u8 correlator, __u8 rc, char *local_name, char *remote_name)
2345 {
2346         struct claw_privbk              *privptr;
2347         struct clawctl                  *p_ctl;
2348         struct sysval                   *p_sysval;
2349         struct conncmd                  *p_connect;
2350         struct sk_buff                  *skb;
2351
2352         CLAW_DBF_TEXT(2, setup, "sndcntl");
2353         privptr = dev->ml_priv;
2354         p_ctl=(struct clawctl *)&privptr->ctl_bk;
2355
2356         p_ctl->command=type;
2357         p_ctl->version=CLAW_VERSION_ID;
2358         p_ctl->linkid=link;
2359         p_ctl->correlator=correlator;
2360         p_ctl->rc=rc;
2361
2362         p_sysval=(struct sysval *)&p_ctl->data;
2363         p_connect=(struct conncmd *)&p_ctl->data;
2364
2365         switch (p_ctl->command) {
2366                 case SYSTEM_VALIDATE_REQUEST:
2367                 case SYSTEM_VALIDATE_RESPONSE:
2368                         memcpy(&p_sysval->host_name, local_name, 8);
2369                         memcpy(&p_sysval->WS_name, remote_name, 8);
2370                         if (privptr->p_env->packing > 0) {
2371                                 p_sysval->read_frame_size = DEF_PACK_BUFSIZE;
2372                                 p_sysval->write_frame_size = DEF_PACK_BUFSIZE;
2373                         } else {
2374                                 /* how big is the biggest group of packets */
2375                            p_sysval->read_frame_size =
2376                                 privptr->p_env->read_size;
2377                            p_sysval->write_frame_size =
2378                                 privptr->p_env->write_size;
2379                         }
2380                         memset(&p_sysval->reserved, 0x00, 4);
2381                         break;
2382                 case CONNECTION_REQUEST:
2383                 case CONNECTION_RESPONSE:
2384                 case CONNECTION_CONFIRM:
2385                 case DISCONNECT:
2386                         memcpy(&p_sysval->host_name, local_name, 8);
2387                         memcpy(&p_sysval->WS_name, remote_name, 8);
2388                         if (privptr->p_env->packing > 0) {
2389                         /* How big is the biggest packet */
2390                                 p_connect->reserved1[0]=CLAW_FRAME_SIZE;
2391                                 p_connect->reserved1[1]=CLAW_FRAME_SIZE;
2392                         } else {
2393                                 memset(&p_connect->reserved1, 0x00, 4);
2394                                 memset(&p_connect->reserved2, 0x00, 4);
2395                         }
2396                         break;
2397                 default:
2398                         break;
2399         }
2400
2401         /*      write Control Record to the device                   */
2402
2403
2404         skb = dev_alloc_skb(sizeof(struct clawctl));
2405         if (!skb) {
2406                 return -ENOMEM;
2407         }
2408         memcpy(skb_put(skb, sizeof(struct clawctl)),
2409                 p_ctl, sizeof(struct clawctl));
2410         if (privptr->p_env->packing >= PACK_SEND)
2411                 claw_hw_tx(skb, dev, 1);
2412         else
2413                 claw_hw_tx(skb, dev, 0);
2414         return 0;
2415 }  /*   end of claw_send_control  */
2416
2417 /*-------------------------------------------------------------------*
2418 *               claw_snd_conn_req                                    *
2419 *                                                                    *
2420 *--------------------------------------------------------------------*/
2421 static int
2422 claw_snd_conn_req(struct net_device *dev, __u8 link)
2423 {
2424         int                rc;
2425         struct claw_privbk *privptr = dev->ml_priv;
2426         struct clawctl     *p_ctl;
2427
2428         CLAW_DBF_TEXT(2, setup, "snd_conn");
2429         rc = 1;
2430         p_ctl=(struct clawctl *)&privptr->ctl_bk;
2431         p_ctl->linkid = link;
2432         if ( privptr->system_validate_comp==0x00 ) {
2433                 return rc;
2434         }
2435         if (privptr->p_env->packing == PACKING_ASK )
2436                 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2437                         WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
2438         if (privptr->p_env->packing == PACK_SEND)  {
2439                 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2440                         WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
2441         }
2442         if (privptr->p_env->packing == 0)
2443                 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2444                         HOST_APPL_NAME, privptr->p_env->api_type);
2445         return rc;
2446
2447 }  /*  end of claw_snd_conn_req */
2448
2449
2450 /*-------------------------------------------------------------------*
2451 *               claw_snd_disc                                        *
2452 *                                                                    *
2453 *--------------------------------------------------------------------*/
2454
2455 static int
2456 claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
2457 {
2458         int rc;
2459         struct conncmd *  p_connect;
2460
2461         CLAW_DBF_TEXT(2, setup, "snd_dsc");
2462         p_connect=(struct conncmd *)&p_ctl->data;
2463
2464         rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
2465                 p_ctl->correlator, 0,
2466                 p_connect->host_name, p_connect->WS_name);
2467         return rc;
2468 }     /*   end of claw_snd_disc    */
2469
2470
2471 /*-------------------------------------------------------------------*
2472 *               claw_snd_sys_validate_rsp                            *
2473 *                                                                    *
2474 *--------------------------------------------------------------------*/
2475
2476 static int
2477 claw_snd_sys_validate_rsp(struct net_device *dev,
2478         struct clawctl *p_ctl, __u32 return_code)
2479 {
2480         struct claw_env *  p_env;
2481         struct claw_privbk *privptr;
2482         int    rc;
2483
2484         CLAW_DBF_TEXT(2, setup, "chkresp");
2485         privptr = dev->ml_priv;
2486         p_env=privptr->p_env;
2487         rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
2488                 p_ctl->linkid,
2489                 p_ctl->correlator,
2490                 return_code,
2491                 p_env->host_name,
2492                 p_env->adapter_name  );
2493         return rc;
2494 }     /*    end of claw_snd_sys_validate_rsp    */
2495
2496 /*-------------------------------------------------------------------*
2497 *               claw_strt_conn_req                                   *
2498 *                                                                    *
2499 *--------------------------------------------------------------------*/
2500
2501 static int
2502 claw_strt_conn_req(struct net_device *dev )
2503 {
2504         int rc;
2505
2506         CLAW_DBF_TEXT(2, setup, "conn_req");
2507         rc=claw_snd_conn_req(dev, 1);
2508         return rc;
2509 }    /*   end of claw_strt_conn_req   */
2510
2511
2512
2513 /*-------------------------------------------------------------------*
2514  *   claw_stats                                                      *
2515  *-------------------------------------------------------------------*/
2516
2517 static struct
2518 net_device_stats *claw_stats(struct net_device *dev)
2519 {
2520         struct claw_privbk *privptr;
2521
2522         CLAW_DBF_TEXT(4, trace, "stats");
2523         privptr = dev->ml_priv;
2524         return &privptr->stats;
2525 }     /*   end of claw_stats   */
2526
2527
2528 /*-------------------------------------------------------------------*
2529 *       unpack_read                                                  *
2530 *                                                                    *
2531 *--------------------------------------------------------------------*/
2532 static void
2533 unpack_read(struct net_device *dev )
2534 {
2535         struct sk_buff *skb;
2536         struct claw_privbk *privptr;
2537         struct claw_env    *p_env;
2538         struct ccwbk    *p_this_ccw;
2539         struct ccwbk    *p_first_ccw;
2540         struct ccwbk    *p_last_ccw;
2541         struct clawph   *p_packh;
2542         void            *p_packd;
2543         struct clawctl  *p_ctlrec=NULL;
2544         struct device   *p_dev;
2545
2546         __u32   len_of_data;
2547         __u32   pack_off;
2548         __u8    link_num;
2549         __u8    mtc_this_frm=0;
2550         __u32   bytes_to_mov;
2551         int     i=0;
2552         int     p=0;
2553
2554         CLAW_DBF_TEXT(4, trace, "unpkread");
2555         p_first_ccw=NULL;
2556         p_last_ccw=NULL;
2557         p_packh=NULL;
2558         p_packd=NULL;
2559         privptr = dev->ml_priv;
2560
2561         p_dev = &privptr->channel[READ_CHANNEL].cdev->dev;
2562         p_env = privptr->p_env;
2563         p_this_ccw=privptr->p_read_active_first;
2564         while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
2565                 pack_off = 0;
2566                 p = 0;
2567                 p_this_ccw->header.flag=CLAW_PENDING;
2568                 privptr->p_read_active_first=p_this_ccw->next;
2569                 p_this_ccw->next=NULL;
2570                 p_packh = (struct clawph *)p_this_ccw->p_buffer;
2571                 if ((p_env->packing == PACK_SEND) &&
2572                     (p_packh->len == 32)           &&
2573                     (p_packh->link_num == 0)) {   /* is it a packed ctl rec? */
2574                         p_packh++;  /* peek past pack header */
2575                         p_ctlrec = (struct clawctl *)p_packh;
2576                         p_packh--;  /* un peek */
2577                         if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
2578                             (p_ctlrec->command == CONNECTION_CONFIRM))
2579                                 p_env->packing = DO_PACKED;
2580                 }
2581                 if (p_env->packing == DO_PACKED)
2582                         link_num=p_packh->link_num;
2583                 else
2584                         link_num=p_this_ccw->header.opcode / 8;
2585                 if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
2586                         mtc_this_frm=1;
2587                         if (p_this_ccw->header.length!=
2588                                 privptr->p_env->read_size ) {
2589                                 dev_warn(p_dev,
2590                                         "The communication peer of %s"
2591                                         " sent a faulty"
2592                                         " frame of length %02x\n",
2593                                         dev->name, p_this_ccw->header.length);
2594                         }
2595                 }
2596
2597                 if (privptr->mtc_skipping) {
2598                         /*
2599                         *   We're in the mode of skipping past a
2600                         *   multi-frame message
2601                         *   that we can't process for some reason or other.
2602                         *   The first frame without the More-To-Come flag is
2603                         *   the last frame of the skipped message.
2604                         */
2605                         /*  in case of More-To-Come not set in this frame */
2606                         if (mtc_this_frm==0) {
2607                                 privptr->mtc_skipping=0; /* Ok, the end */
2608                                 privptr->mtc_logical_link=-1;
2609                         }
2610                         goto NextFrame;
2611                 }
2612
2613                 if (link_num==0) {
2614                         claw_process_control(dev, p_this_ccw);
2615                         CLAW_DBF_TEXT(4, trace, "UnpkCntl");
2616                         goto NextFrame;
2617                 }
2618 unpack_next:
2619                 if (p_env->packing == DO_PACKED) {
2620                         if (pack_off > p_env->read_size)
2621                                 goto NextFrame;
2622                         p_packd = p_this_ccw->p_buffer+pack_off;
2623                         p_packh = (struct clawph *) p_packd;
2624                         if ((p_packh->len == 0) || /* done with this frame? */
2625                             (p_packh->flag != 0))
2626                                 goto NextFrame;
2627                         bytes_to_mov = p_packh->len;
2628                         pack_off += bytes_to_mov+sizeof(struct clawph);
2629                         p++;
2630                 } else {
2631                         bytes_to_mov=p_this_ccw->header.length;
2632                 }
2633                 if (privptr->mtc_logical_link<0) {
2634
2635                 /*
2636                 *  if More-To-Come is set in this frame then we don't know
2637                 *  length of entire message, and hence have to allocate
2638                 *  large buffer   */
2639
2640                 /*      We are starting a new envelope  */
2641                 privptr->mtc_offset=0;
2642                         privptr->mtc_logical_link=link_num;
2643                 }
2644
2645                 if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
2646                         /*      error     */
2647                         privptr->stats.rx_frame_errors++;
2648                         goto NextFrame;
2649                 }
2650                 if (p_env->packing == DO_PACKED) {
2651                         memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
2652                                 p_packd+sizeof(struct clawph), bytes_to_mov);
2653
2654                 } else  {
2655                         memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
2656                                 p_this_ccw->p_buffer, bytes_to_mov);
2657                 }
2658                 if (mtc_this_frm==0) {
2659                         len_of_data=privptr->mtc_offset+bytes_to_mov;
2660                         skb=dev_alloc_skb(len_of_data);
2661                         if (skb) {
2662                                 memcpy(skb_put(skb,len_of_data),
2663                                         privptr->p_mtc_envelope,
2664                                         len_of_data);
2665                                 skb->dev=dev;
2666                                 skb_reset_mac_header(skb);
2667                                 skb->protocol=htons(ETH_P_IP);
2668                                 skb->ip_summed=CHECKSUM_UNNECESSARY;
2669                                 privptr->stats.rx_packets++;
2670                                 privptr->stats.rx_bytes+=len_of_data;
2671                                 netif_rx(skb);
2672                         }
2673                         else {
2674                                 dev_info(p_dev, "Allocating a buffer for"
2675                                         " incoming data failed\n");
2676                                 privptr->stats.rx_dropped++;
2677                         }
2678                         privptr->mtc_offset=0;
2679                         privptr->mtc_logical_link=-1;
2680                 }
2681                 else {
2682                         privptr->mtc_offset+=bytes_to_mov;
2683                 }
2684                 if (p_env->packing == DO_PACKED)
2685                         goto unpack_next;
2686 NextFrame:
2687                 /*
2688                 *   Remove ThisCCWblock from active read queue, and add it
2689                 *   to queue of free blocks to be reused.
2690                 */
2691                 i++;
2692                 p_this_ccw->header.length=0xffff;
2693                 p_this_ccw->header.opcode=0xff;
2694                 /*
2695                 *       add this one to the free queue for later reuse
2696                 */
2697                 if (p_first_ccw==NULL) {
2698                         p_first_ccw = p_this_ccw;
2699                 }
2700                 else {
2701                         p_last_ccw->next = p_this_ccw;
2702                 }
2703                 p_last_ccw = p_this_ccw;
2704                 /*
2705                 *       chain to next block on active read queue
2706                 */
2707                 p_this_ccw = privptr->p_read_active_first;
2708                 CLAW_DBF_TEXT_(4, trace, "rxpkt %d", p);
2709         } /* end of while */
2710
2711         /*      check validity                  */
2712
2713         CLAW_DBF_TEXT_(4, trace, "rxfrm %d", i);
2714         add_claw_reads(dev, p_first_ccw, p_last_ccw);
2715         claw_strt_read(dev, LOCK_YES);
2716         return;
2717 }     /*  end of unpack_read   */
2718
2719 /*-------------------------------------------------------------------*
2720 *       claw_strt_read                                               *
2721 *                                                                    *
2722 *--------------------------------------------------------------------*/
2723 static void
2724 claw_strt_read (struct net_device *dev, int lock )
2725 {
2726         int        rc = 0;
2727         __u32      parm;
2728         unsigned long  saveflags = 0;
2729         struct claw_privbk *privptr = dev->ml_priv;
2730         struct ccwbk*p_ccwbk;
2731         struct chbk *p_ch;
2732         struct clawh *p_clawh;
2733         p_ch = &privptr->channel[READ_CHANNEL];
2734
2735         CLAW_DBF_TEXT(4, trace, "StRdNter");
2736         p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
2737         p_clawh->flag=CLAW_IDLE;    /* 0x00 */
2738
2739         if ((privptr->p_write_active_first!=NULL &&
2740              privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
2741             (privptr->p_read_active_first!=NULL &&
2742              privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
2743                 p_clawh->flag=CLAW_BUSY;    /* 0xff */
2744         }
2745         if (lock==LOCK_YES) {
2746                 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
2747         }
2748         if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
2749                 CLAW_DBF_TEXT(4, trace, "HotRead");
2750                 p_ccwbk=privptr->p_read_active_first;
2751                 parm = (unsigned long) p_ch;
2752                 rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
2753                                        0xff, 0);
2754                 if (rc != 0) {
2755                         ccw_check_return_code(p_ch->cdev, rc);
2756                 }
2757         }
2758         else {
2759                 CLAW_DBF_TEXT(2, trace, "ReadAct");
2760         }
2761
2762         if (lock==LOCK_YES) {
2763                 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
2764         }
2765         CLAW_DBF_TEXT(4, trace, "StRdExit");
2766         return;
2767 }       /*    end of claw_strt_read    */
2768
2769 /*-------------------------------------------------------------------*
2770 *       claw_strt_out_IO                                             *
2771 *                                                                    *
2772 *--------------------------------------------------------------------*/
2773
2774 static void
2775 claw_strt_out_IO( struct net_device *dev )
2776 {
2777         int                     rc = 0;
2778         unsigned long           parm;
2779         struct claw_privbk      *privptr;
2780         struct chbk             *p_ch;
2781         struct ccwbk    *p_first_ccw;
2782
2783         if (!dev) {
2784                 return;
2785         }
2786         privptr = (struct claw_privbk *)dev->ml_priv;
2787         p_ch = &privptr->channel[WRITE_CHANNEL];
2788
2789         CLAW_DBF_TEXT(4, trace, "strt_io");
2790         p_first_ccw=privptr->p_write_active_first;
2791
2792         if (p_ch->claw_state == CLAW_STOP)
2793                 return;
2794         if (p_first_ccw == NULL) {
2795                 return;
2796         }
2797         if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
2798                 parm = (unsigned long) p_ch;
2799                 CLAW_DBF_TEXT(2, trace, "StWrtIO");
2800                 rc = ccw_device_start(p_ch->cdev, &p_first_ccw->write, parm,
2801                                       0xff, 0);
2802                 if (rc != 0) {
2803                         ccw_check_return_code(p_ch->cdev, rc);
2804                 }
2805         }
2806         dev->trans_start = jiffies;
2807         return;
2808 }       /*    end of claw_strt_out_IO    */
2809
2810 /*-------------------------------------------------------------------*
2811 *       Free write buffers                                           *
2812 *                                                                    *
2813 *--------------------------------------------------------------------*/
2814
2815 static void
2816 claw_free_wrt_buf( struct net_device *dev )
2817 {
2818
2819         struct claw_privbk *privptr = (struct claw_privbk *)dev->ml_priv;
2820         struct ccwbk*p_first_ccw;
2821         struct ccwbk*p_last_ccw;
2822         struct ccwbk*p_this_ccw;
2823         struct ccwbk*p_next_ccw;
2824
2825         CLAW_DBF_TEXT(4, trace, "freewrtb");
2826         /*  scan the write queue to free any completed write packets   */
2827         p_first_ccw=NULL;
2828         p_last_ccw=NULL;
2829         p_this_ccw=privptr->p_write_active_first;
2830         while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
2831         {
2832                 p_next_ccw = p_this_ccw->next;
2833                 if (((p_next_ccw!=NULL) &&
2834                      (p_next_ccw->header.flag!=CLAW_PENDING)) ||
2835                     ((p_this_ccw == privptr->p_write_active_last) &&
2836                      (p_this_ccw->header.flag!=CLAW_PENDING))) {
2837                         /* The next CCW is OK or this is  */
2838                         /* the last CCW...free it   @A1A  */
2839                         privptr->p_write_active_first=p_this_ccw->next;
2840                         p_this_ccw->header.flag=CLAW_PENDING;
2841                         p_this_ccw->next=privptr->p_write_free_chain;
2842                         privptr->p_write_free_chain=p_this_ccw;
2843                         ++privptr->write_free_count;
2844                         privptr->stats.tx_bytes+= p_this_ccw->write.count;
2845                         p_this_ccw=privptr->p_write_active_first;
2846                         privptr->stats.tx_packets++;
2847                 }
2848                 else {
2849                         break;
2850                 }
2851         }
2852         if (privptr->write_free_count!=0) {
2853                 claw_clearbit_busy(TB_NOBUFFER,dev);
2854         }
2855         /*   whole chain removed?   */
2856         if (privptr->p_write_active_first==NULL) {
2857                 privptr->p_write_active_last=NULL;
2858         }
2859         CLAW_DBF_TEXT_(4, trace, "FWC=%d", privptr->write_free_count);
2860         return;
2861 }
2862
2863 /*-------------------------------------------------------------------*
2864 *       claw free netdevice                                          *
2865 *                                                                    *
2866 *--------------------------------------------------------------------*/
2867 static void
2868 claw_free_netdevice(struct net_device * dev, int free_dev)
2869 {
2870         struct claw_privbk *privptr;
2871
2872         CLAW_DBF_TEXT(2, setup, "free_dev");
2873         if (!dev)
2874                 return;
2875         CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
2876         privptr = dev->ml_priv;
2877         if (dev->flags & IFF_RUNNING)
2878                 claw_release(dev);
2879         if (privptr) {
2880                 privptr->channel[READ_CHANNEL].ndev = NULL;  /* say it's free */
2881         }
2882         dev->ml_priv = NULL;
2883 #ifdef MODULE
2884         if (free_dev) {
2885                 free_netdev(dev);
2886         }
2887 #endif
2888         CLAW_DBF_TEXT(2, setup, "free_ok");
2889 }
2890
2891 /**
2892  * Claw init netdevice
2893  * Initialize everything of the net device except the name and the
2894  * channel structs.
2895  */
2896 static const struct net_device_ops claw_netdev_ops = {
2897         .ndo_open               = claw_open,
2898         .ndo_stop               = claw_release,
2899         .ndo_get_stats          = claw_stats,
2900         .ndo_start_xmit         = claw_tx,
2901         .ndo_change_mtu         = claw_change_mtu,
2902 };
2903
2904 static void
2905 claw_init_netdevice(struct net_device * dev)
2906 {
2907         CLAW_DBF_TEXT(2, setup, "init_dev");
2908         CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
2909         dev->mtu = CLAW_DEFAULT_MTU_SIZE;
2910         dev->hard_header_len = 0;
2911         dev->addr_len = 0;
2912         dev->type = ARPHRD_SLIP;
2913         dev->tx_queue_len = 1300;
2914         dev->flags = IFF_POINTOPOINT | IFF_NOARP;
2915         dev->netdev_ops = &claw_netdev_ops;
2916         CLAW_DBF_TEXT(2, setup, "initok");
2917         return;
2918 }
2919
2920 /**
2921  * Init a new channel in the privptr->channel[i].
2922  *
2923  * @param cdev  The ccw_device to be added.
2924  *
2925  * @return 0 on success, !0 on error.
2926  */
2927 static int
2928 add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
2929 {
2930         struct chbk *p_ch;
2931         struct ccw_dev_id dev_id;
2932
2933         CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cdev->dev));
2934         privptr->channel[i].flag  = i+1;   /* Read is 1 Write is 2 */
2935         p_ch = &privptr->channel[i];
2936         p_ch->cdev = cdev;
2937         snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", dev_name(&cdev->dev));
2938         ccw_device_get_id(cdev, &dev_id);
2939         p_ch->devno = dev_id.devno;
2940         if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
2941                 return -ENOMEM;
2942         }
2943         return 0;
2944 }
2945
2946
2947 /**
2948  *
2949  * Setup an interface.
2950  *
2951  * @param cgdev  Device to be setup.
2952  *
2953  * @returns 0 on success, !0 on failure.
2954  */
2955 static int
2956 claw_new_device(struct ccwgroup_device *cgdev)
2957 {
2958         struct claw_privbk *privptr;
2959         struct claw_env *p_env;
2960         struct net_device *dev;
2961         int ret;
2962         struct ccw_dev_id dev_id;
2963
2964         dev_info(&cgdev->dev, "add for %s\n",
2965                  dev_name(&cgdev->cdev[READ_CHANNEL]->dev));
2966         CLAW_DBF_TEXT(2, setup, "new_dev");
2967         privptr = dev_get_drvdata(&cgdev->dev);
2968         dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, privptr);
2969         dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, privptr);
2970         if (!privptr)
2971                 return -ENODEV;
2972         p_env = privptr->p_env;
2973         ccw_device_get_id(cgdev->cdev[READ_CHANNEL], &dev_id);
2974         p_env->devno[READ_CHANNEL] = dev_id.devno;
2975         ccw_device_get_id(cgdev->cdev[WRITE_CHANNEL], &dev_id);
2976         p_env->devno[WRITE_CHANNEL] = dev_id.devno;
2977         ret = add_channel(cgdev->cdev[0],0,privptr);
2978         if (ret == 0)
2979                 ret = add_channel(cgdev->cdev[1],1,privptr);
2980         if (ret != 0) {
2981                 dev_warn(&cgdev->dev, "Creating a CLAW group device"
2982                         " failed with error code %d\n", ret);
2983                 goto out;
2984         }
2985         ret = ccw_device_set_online(cgdev->cdev[READ_CHANNEL]);
2986         if (ret != 0) {
2987                 dev_warn(&cgdev->dev,
2988                         "Setting the read subchannel online"
2989                         " failed with error code %d\n", ret);
2990                 goto out;
2991         }
2992         ret = ccw_device_set_online(cgdev->cdev[WRITE_CHANNEL]);
2993         if (ret != 0) {
2994                 dev_warn(&cgdev->dev,
2995                         "Setting the write subchannel online "
2996                         "failed with error code %d\n", ret);
2997                 goto out;
2998         }
2999         dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
3000         if (!dev) {
3001                 dev_warn(&cgdev->dev,
3002                         "Activating the CLAW device failed\n");
3003                 goto out;
3004         }
3005         dev->ml_priv = privptr;
3006         dev_set_drvdata(&cgdev->dev, privptr);
3007         dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, privptr);
3008         dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, privptr);
3009         /* sysfs magic */
3010         SET_NETDEV_DEV(dev, &cgdev->dev);
3011         if (register_netdev(dev) != 0) {
3012                 claw_free_netdevice(dev, 1);
3013                 CLAW_DBF_TEXT(2, trace, "regfail");
3014                 goto out;
3015         }
3016         dev->flags &=~IFF_RUNNING;
3017         if (privptr->buffs_alloc == 0) {
3018                 ret=init_ccw_bk(dev);
3019                 if (ret !=0) {
3020                         unregister_netdev(dev);
3021                         claw_free_netdevice(dev,1);
3022                         CLAW_DBF_TEXT(2, trace, "ccwmem");
3023                         goto out;
3024                 }
3025         }
3026         privptr->channel[READ_CHANNEL].ndev = dev;
3027         privptr->channel[WRITE_CHANNEL].ndev = dev;
3028         privptr->p_env->ndev = dev;
3029
3030         dev_info(&cgdev->dev, "%s:readsize=%d  writesize=%d "
3031                 "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
3032                 dev->name, p_env->read_size,
3033                 p_env->write_size, p_env->read_buffers,
3034                 p_env->write_buffers, p_env->devno[READ_CHANNEL],
3035                 p_env->devno[WRITE_CHANNEL]);
3036         dev_info(&cgdev->dev, "%s:host_name:%.8s, adapter_name "
3037                 ":%.8s api_type: %.8s\n",
3038                 dev->name, p_env->host_name,
3039                 p_env->adapter_name , p_env->api_type);
3040         return 0;
3041 out:
3042         ccw_device_set_offline(cgdev->cdev[1]);
3043         ccw_device_set_offline(cgdev->cdev[0]);
3044         return -ENODEV;
3045 }
3046
3047 static void
3048 claw_purge_skb_queue(struct sk_buff_head *q)
3049 {
3050         struct sk_buff *skb;
3051
3052         CLAW_DBF_TEXT(4, trace, "purgque");
3053         while ((skb = skb_dequeue(q))) {
3054                 atomic_dec(&skb->users);
3055                 dev_kfree_skb_any(skb);
3056         }
3057 }
3058
3059 /**
3060  * Shutdown an interface.
3061  *
3062  * @param cgdev  Device to be shut down.
3063  *
3064  * @returns 0 on success, !0 on failure.
3065  */
3066 static int
3067 claw_shutdown_device(struct ccwgroup_device *cgdev)
3068 {
3069         struct claw_privbk *priv;
3070         struct net_device *ndev;
3071         int     ret;
3072
3073         CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
3074         priv = dev_get_drvdata(&cgdev->dev);
3075         if (!priv)
3076                 return -ENODEV;
3077         ndev = priv->channel[READ_CHANNEL].ndev;
3078         if (ndev) {
3079                 /* Close the device */
3080                 dev_info(&cgdev->dev, "%s: shutting down\n",
3081                         ndev->name);
3082                 if (ndev->flags & IFF_RUNNING)
3083                         ret = claw_release(ndev);
3084                 ndev->flags &=~IFF_RUNNING;
3085                 unregister_netdev(ndev);
3086                 ndev->ml_priv = NULL;  /* cgdev data, not ndev's to free */
3087                 claw_free_netdevice(ndev, 1);
3088                 priv->channel[READ_CHANNEL].ndev = NULL;
3089                 priv->channel[WRITE_CHANNEL].ndev = NULL;
3090                 priv->p_env->ndev = NULL;
3091         }
3092         ccw_device_set_offline(cgdev->cdev[1]);
3093         ccw_device_set_offline(cgdev->cdev[0]);
3094         return 0;
3095 }
3096
3097 static void
3098 claw_remove_device(struct ccwgroup_device *cgdev)
3099 {
3100         struct claw_privbk *priv;
3101
3102         BUG_ON(!cgdev);
3103         CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
3104         priv = dev_get_drvdata(&cgdev->dev);
3105         BUG_ON(!priv);
3106         dev_info(&cgdev->dev, " will be removed.\n");
3107         if (cgdev->state == CCWGROUP_ONLINE)
3108                 claw_shutdown_device(cgdev);
3109         claw_remove_files(&cgdev->dev);
3110         kfree(priv->p_mtc_envelope);
3111         priv->p_mtc_envelope=NULL;
3112         kfree(priv->p_env);
3113         priv->p_env=NULL;
3114         kfree(priv->channel[0].irb);
3115         priv->channel[0].irb=NULL;
3116         kfree(priv->channel[1].irb);
3117         priv->channel[1].irb=NULL;
3118         kfree(priv);
3119         dev_set_drvdata(&cgdev->dev, NULL);
3120         dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, NULL);
3121         dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, NULL);
3122         put_device(&cgdev->dev);
3123
3124         return;
3125 }
3126
3127
3128 /*
3129  * sysfs attributes
3130  */
3131 static ssize_t
3132 claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
3133 {
3134         struct claw_privbk *priv;
3135         struct claw_env *  p_env;
3136
3137         priv = dev_get_drvdata(dev);
3138         if (!priv)
3139                 return -ENODEV;
3140         p_env = priv->p_env;
3141         return sprintf(buf, "%s\n",p_env->host_name);
3142 }
3143
3144 static ssize_t
3145 claw_hname_write(struct device *dev, struct device_attribute *attr,
3146          const char *buf, size_t count)
3147 {
3148         struct claw_privbk *priv;
3149         struct claw_env *  p_env;
3150
3151         priv = dev_get_drvdata(dev);
3152         if (!priv)
3153                 return -ENODEV;
3154         p_env = priv->p_env;
3155         if (count > MAX_NAME_LEN+1)
3156                 return -EINVAL;
3157         memset(p_env->host_name, 0x20, MAX_NAME_LEN);
3158         strncpy(p_env->host_name,buf, count);
3159         p_env->host_name[count-1] = 0x20;  /* clear extra 0x0a */
3160         p_env->host_name[MAX_NAME_LEN] = 0x00;
3161         CLAW_DBF_TEXT(2, setup, "HstnSet");
3162         CLAW_DBF_TEXT_(2, setup, "%s", p_env->host_name);
3163
3164         return count;
3165 }
3166
3167 static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
3168
3169 static ssize_t
3170 claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
3171 {
3172         struct claw_privbk *priv;
3173         struct claw_env *  p_env;
3174
3175         priv = dev_get_drvdata(dev);
3176         if (!priv)
3177                 return -ENODEV;
3178         p_env = priv->p_env;
3179         return sprintf(buf, "%s\n", p_env->adapter_name);
3180 }
3181
3182 static ssize_t
3183 claw_adname_write(struct device *dev, struct device_attribute *attr,
3184          const char *buf, size_t count)
3185 {
3186         struct claw_privbk *priv;
3187         struct claw_env *  p_env;
3188
3189         priv = dev_get_drvdata(dev);
3190         if (!priv)
3191                 return -ENODEV;
3192         p_env = priv->p_env;
3193         if (count > MAX_NAME_LEN+1)
3194                 return -EINVAL;
3195         memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
3196         strncpy(p_env->adapter_name,buf, count);
3197         p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
3198         p_env->adapter_name[MAX_NAME_LEN] = 0x00;
3199         CLAW_DBF_TEXT(2, setup, "AdnSet");
3200         CLAW_DBF_TEXT_(2, setup, "%s", p_env->adapter_name);
3201
3202         return count;
3203 }
3204
3205 static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
3206
3207 static ssize_t
3208 claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
3209 {
3210         struct claw_privbk *priv;
3211         struct claw_env *  p_env;
3212
3213         priv = dev_get_drvdata(dev);
3214         if (!priv)
3215                 return -ENODEV;
3216         p_env = priv->p_env;
3217         return sprintf(buf, "%s\n",
3218                        p_env->api_type);
3219 }
3220
3221 static ssize_t
3222 claw_apname_write(struct device *dev, struct device_attribute *attr,
3223         const char *buf, size_t count)
3224 {
3225         struct claw_privbk *priv;
3226         struct claw_env *  p_env;
3227
3228         priv = dev_get_drvdata(dev);
3229         if (!priv)
3230                 return -ENODEV;
3231         p_env = priv->p_env;
3232         if (count > MAX_NAME_LEN+1)
3233                 return -EINVAL;
3234         memset(p_env->api_type, 0x20, MAX_NAME_LEN);
3235         strncpy(p_env->api_type,buf, count);
3236         p_env->api_type[count-1] = 0x20;  /* we get a loose 0x0a */
3237         p_env->api_type[MAX_NAME_LEN] = 0x00;
3238         if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
3239                 p_env->read_size=DEF_PACK_BUFSIZE;
3240                 p_env->write_size=DEF_PACK_BUFSIZE;
3241                 p_env->packing=PACKING_ASK;
3242                 CLAW_DBF_TEXT(2, setup, "PACKING");
3243         }
3244         else {
3245                 p_env->packing=0;
3246                 p_env->read_size=CLAW_FRAME_SIZE;
3247                 p_env->write_size=CLAW_FRAME_SIZE;
3248                 CLAW_DBF_TEXT(2, setup, "ApiSet");
3249         }
3250         CLAW_DBF_TEXT_(2, setup, "%s", p_env->api_type);
3251         return count;
3252 }
3253
3254 static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
3255
3256 static ssize_t
3257 claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
3258 {
3259         struct claw_privbk *priv;
3260         struct claw_env * p_env;
3261
3262         priv = dev_get_drvdata(dev);
3263         if (!priv)
3264                 return -ENODEV;
3265         p_env = priv->p_env;
3266         return sprintf(buf, "%d\n", p_env->write_buffers);
3267 }
3268
3269 static ssize_t
3270 claw_wbuff_write(struct device *dev, struct device_attribute *attr,
3271         const char *buf, size_t count)
3272 {
3273         struct claw_privbk *priv;
3274         struct claw_env *  p_env;
3275         int nnn,max;
3276
3277         priv = dev_get_drvdata(dev);
3278         if (!priv)
3279                 return -ENODEV;
3280         p_env = priv->p_env;
3281         sscanf(buf, "%i", &nnn);
3282         if (p_env->packing) {
3283                 max = 64;
3284         }
3285         else {
3286                 max = 512;
3287         }
3288         if ((nnn > max ) || (nnn < 2))
3289                 return -EINVAL;
3290         p_env->write_buffers = nnn;
3291         CLAW_DBF_TEXT(2, setup, "Wbufset");
3292         CLAW_DBF_TEXT_(2, setup, "WB=%d", p_env->write_buffers);
3293         return count;
3294 }
3295
3296 static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
3297
3298 static ssize_t
3299 claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
3300 {
3301         struct claw_privbk *priv;
3302         struct claw_env *  p_env;
3303
3304         priv = dev_get_drvdata(dev);
3305         if (!priv)
3306                 return -ENODEV;
3307         p_env = priv->p_env;
3308         return sprintf(buf, "%d\n", p_env->read_buffers);
3309 }
3310
3311 static ssize_t
3312 claw_rbuff_write(struct device *dev, struct device_attribute *attr,
3313         const char *buf, size_t count)
3314 {
3315         struct claw_privbk *priv;
3316         struct claw_env *p_env;
3317         int nnn,max;
3318
3319         priv = dev_get_drvdata(dev);
3320         if (!priv)
3321                 return -ENODEV;
3322         p_env = priv->p_env;
3323         sscanf(buf, "%i", &nnn);
3324         if (p_env->packing) {
3325                 max = 64;
3326         }
3327         else {
3328                 max = 512;
3329         }
3330         if ((nnn > max ) || (nnn < 2))
3331                 return -EINVAL;
3332         p_env->read_buffers = nnn;
3333         CLAW_DBF_TEXT(2, setup, "Rbufset");
3334         CLAW_DBF_TEXT_(2, setup, "RB=%d", p_env->read_buffers);
3335         return count;
3336 }
3337
3338 static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
3339
3340 static struct attribute *claw_attr[] = {
3341         &dev_attr_read_buffer.attr,
3342         &dev_attr_write_buffer.attr,
3343         &dev_attr_adapter_name.attr,
3344         &dev_attr_api_type.attr,
3345         &dev_attr_host_name.attr,
3346         NULL,
3347 };
3348
3349 static struct attribute_group claw_attr_group = {
3350         .attrs = claw_attr,
3351 };
3352
3353 static int
3354 claw_add_files(struct device *dev)
3355 {
3356         CLAW_DBF_TEXT(2, setup, "add_file");
3357         return sysfs_create_group(&dev->kobj, &claw_attr_group);
3358 }
3359
3360 static void
3361 claw_remove_files(struct device *dev)
3362 {
3363         CLAW_DBF_TEXT(2, setup, "rem_file");
3364         sysfs_remove_group(&dev->kobj, &claw_attr_group);
3365 }
3366
3367 /*--------------------------------------------------------------------*
3368 *    claw_init  and cleanup                                           *
3369 *---------------------------------------------------------------------*/
3370
3371 static void __exit
3372 claw_cleanup(void)
3373 {
3374         driver_remove_file(&claw_group_driver.driver,
3375                            &driver_attr_group);
3376         ccwgroup_driver_unregister(&claw_group_driver);
3377         ccw_driver_unregister(&claw_ccw_driver);
3378         root_device_unregister(claw_root_dev);
3379         claw_unregister_debug_facility();
3380         pr_info("Driver unloaded\n");
3381
3382 }
3383
3384 /**
3385  * Initialize module.
3386  * This is called just after the module is loaded.
3387  *
3388  * @return 0 on success, !0 on error.
3389  */
3390 static int __init
3391 claw_init(void)
3392 {
3393         int ret = 0;
3394
3395         pr_info("Loading %s\n", version);
3396         ret = claw_register_debug_facility();
3397         if (ret) {
3398                 pr_err("Registering with the S/390 debug feature"
3399                         " failed with error code %d\n", ret);
3400                 goto out_err;
3401         }
3402         CLAW_DBF_TEXT(2, setup, "init_mod");
3403         claw_root_dev = root_device_register("claw");
3404         ret = IS_ERR(claw_root_dev) ? PTR_ERR(claw_root_dev) : 0;
3405         if (ret)
3406                 goto register_err;
3407         ret = ccw_driver_register(&claw_ccw_driver);
3408         if (ret)
3409                 goto ccw_err;
3410         claw_group_driver.driver.groups = claw_group_attr_groups;
3411         ret = ccwgroup_driver_register(&claw_group_driver);
3412         if (ret)
3413                 goto ccwgroup_err;
3414         return 0;
3415
3416 ccwgroup_err:
3417         ccw_driver_unregister(&claw_ccw_driver);
3418 ccw_err:
3419         root_device_unregister(claw_root_dev);
3420 register_err:
3421         CLAW_DBF_TEXT(2, setup, "init_bad");
3422         claw_unregister_debug_facility();
3423 out_err:
3424         pr_err("Initializing the claw device driver failed\n");
3425         return ret;
3426 }
3427
3428 module_init(claw_init);
3429 module_exit(claw_cleanup);
3430
3431 MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
3432 MODULE_DESCRIPTION("Linux for System z CLAW Driver\n" \
3433                         "Copyright 2000,2008 IBM Corporation\n");
3434 MODULE_LICENSE("GPL");