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claw.c
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1 /*
2  * ESCON CLAW network driver
3  *
4  * Linux for zSeries version
5  * Copyright IBM Corp. 2002, 2009
6  * Author(s) Original code written by:
7  * Kazuo Iimura <[email protected]>
8  * Rewritten by
9  * Andy Richter <[email protected]>
10  * Marc Price <[email protected]>
11  *
12  * sysfs parms:
13  * group x.x.rrrr,x.x.wwww
14  * read_buffer nnnnnnn
15  * write_buffer nnnnnn
16  * host_name aaaaaaaa
17  * adapter_name aaaaaaaa
18  * api_type aaaaaaaa
19  *
20  * eg.
21  * group 0.0.0200 0.0.0201
22  * read_buffer 25
23  * write_buffer 20
24  * host_name LINUX390
25  * adapter_name RS6K
26  * api_type TCPIP
27  *
28  * where
29  *
30  * The device id is decided by the order entries
31  * are added to the group the first is claw0 the second claw1
32  * up to CLAW_MAX_DEV
33  *
34  * rrrr - the first of 2 consecutive device addresses used for the
35  * CLAW protocol.
36  * The specified address is always used as the input (Read)
37  * channel and the next address is used as the output channel.
38  *
39  * wwww - the second of 2 consecutive device addresses used for
40  * the CLAW protocol.
41  * The specified address is always used as the output
42  * channel and the previous address is used as the input channel.
43  *
44  * read_buffer - specifies number of input buffers to allocate.
45  * write_buffer - specifies number of output buffers to allocate.
46  * host_name - host name
47  * adaptor_name - adaptor name
48  * api_type - API type TCPIP or API will be sent and expected
49  * as ws_name
50  *
51  * Note the following requirements:
52  * 1) host_name must match the configured adapter_name on the remote side
53  * 2) adaptor_name must match the configured host name on the remote side
54  *
55  * Change History
56  * 1.00 Initial release shipped
57  * 1.10 Changes for Buffer allocation
58  * 1.15 Changed for 2.6 Kernel No longer compiles on 2.4 or lower
59  * 1.25 Added Packing support
60  * 1.5
61  */
62 
63 #define KMSG_COMPONENT "claw"
64 
65 #include <asm/ccwdev.h>
66 #include <asm/ccwgroup.h>
67 #include <asm/debug.h>
68 #include <asm/idals.h>
69 #include <asm/io.h>
70 #include <linux/bitops.h>
71 #include <linux/ctype.h>
72 #include <linux/delay.h>
73 #include <linux/errno.h>
74 #include <linux/if_arp.h>
75 #include <linux/init.h>
76 #include <linux/interrupt.h>
77 #include <linux/ip.h>
78 #include <linux/kernel.h>
79 #include <linux/module.h>
80 #include <linux/netdevice.h>
81 #include <linux/etherdevice.h>
82 #include <linux/proc_fs.h>
83 #include <linux/sched.h>
84 #include <linux/signal.h>
85 #include <linux/skbuff.h>
86 #include <linux/slab.h>
87 #include <linux/string.h>
88 #include <linux/tcp.h>
89 #include <linux/timer.h>
90 #include <linux/types.h>
91 
92 #include "claw.h"
93 
94 /*
95  CLAW uses the s390dbf file system see claw_trace and claw_setup
96 */
97 
98 static char version[] __initdata = "CLAW driver";
99 static char debug_buffer[255];
103 static debug_info_t *claw_dbf_setup;
104 static debug_info_t *claw_dbf_trace;
105 
109 static void
110 claw_unregister_debug_facility(void)
111 {
112  if (claw_dbf_setup)
113  debug_unregister(claw_dbf_setup);
114  if (claw_dbf_trace)
115  debug_unregister(claw_dbf_trace);
116 }
117 
118 static int
119 claw_register_debug_facility(void)
120 {
121  claw_dbf_setup = debug_register("claw_setup", 2, 1, 8);
122  claw_dbf_trace = debug_register("claw_trace", 2, 2, 8);
123  if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
124  claw_unregister_debug_facility();
125  return -ENOMEM;
126  }
127  debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
128  debug_set_level(claw_dbf_setup, 2);
129  debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
130  debug_set_level(claw_dbf_trace, 2);
131  return 0;
132 }
133 
134 static inline void
135 claw_set_busy(struct net_device *dev)
136 {
137  ((struct claw_privbk *)dev->ml_priv)->tbusy = 1;
138 }
139 
140 static inline void
141 claw_clear_busy(struct net_device *dev)
142 {
143  clear_bit(0, &(((struct claw_privbk *) dev->ml_priv)->tbusy));
144  netif_wake_queue(dev);
145 }
146 
147 static inline int
148 claw_check_busy(struct net_device *dev)
149 {
150  return ((struct claw_privbk *) dev->ml_priv)->tbusy;
151 }
152 
153 static inline void
154 claw_setbit_busy(int nr,struct net_device *dev)
155 {
156  netif_stop_queue(dev);
157  set_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy));
158 }
159 
160 static inline void
161 claw_clearbit_busy(int nr,struct net_device *dev)
162 {
163  clear_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy));
164  netif_wake_queue(dev);
165 }
166 
167 static inline int
168 claw_test_and_setbit_busy(int nr,struct net_device *dev)
169 {
170  netif_stop_queue(dev);
171  return test_and_set_bit(nr,
172  (void *)&(((struct claw_privbk *) dev->ml_priv)->tbusy));
173 }
174 
175 
176 /* Functions for the DEV methods */
177 
178 static int claw_probe(struct ccwgroup_device *cgdev);
179 static void claw_remove_device(struct ccwgroup_device *cgdev);
180 static void claw_purge_skb_queue(struct sk_buff_head *q);
181 static int claw_new_device(struct ccwgroup_device *cgdev);
182 static int claw_shutdown_device(struct ccwgroup_device *cgdev);
183 static int claw_tx(struct sk_buff *skb, struct net_device *dev);
184 static int claw_change_mtu( struct net_device *dev, int new_mtu);
185 static int claw_open(struct net_device *dev);
186 static void claw_irq_handler(struct ccw_device *cdev,
187  unsigned long intparm, struct irb *irb);
188 static void claw_irq_tasklet ( unsigned long data );
189 static int claw_release(struct net_device *dev);
190 static void claw_write_retry ( struct chbk * p_ch );
191 static void claw_write_next ( struct chbk * p_ch );
192 static void claw_timer ( struct chbk * p_ch );
193 
194 /* Functions */
195 static int add_claw_reads(struct net_device *dev,
196  struct ccwbk* p_first, struct ccwbk* p_last);
197 static void ccw_check_return_code (struct ccw_device *cdev, int return_code);
198 static void ccw_check_unit_check (struct chbk * p_ch, unsigned char sense );
199 static int find_link(struct net_device *dev, char *host_name, char *ws_name );
200 static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
201 static int init_ccw_bk(struct net_device *dev);
202 static void probe_error( struct ccwgroup_device *cgdev);
203 static struct net_device_stats *claw_stats(struct net_device *dev);
204 static int pages_to_order_of_mag(int num_of_pages);
205 static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
206 /* sysfs Functions */
207 static ssize_t claw_hname_show(struct device *dev,
208  struct device_attribute *attr, char *buf);
209 static ssize_t claw_hname_write(struct device *dev,
210  struct device_attribute *attr,
211  const char *buf, size_t count);
212 static ssize_t claw_adname_show(struct device *dev,
213  struct device_attribute *attr, char *buf);
214 static ssize_t claw_adname_write(struct device *dev,
215  struct device_attribute *attr,
216  const char *buf, size_t count);
217 static ssize_t claw_apname_show(struct device *dev,
218  struct device_attribute *attr, char *buf);
219 static ssize_t claw_apname_write(struct device *dev,
220  struct device_attribute *attr,
221  const char *buf, size_t count);
222 static ssize_t claw_wbuff_show(struct device *dev,
223  struct device_attribute *attr, char *buf);
224 static ssize_t claw_wbuff_write(struct device *dev,
225  struct device_attribute *attr,
226  const char *buf, size_t count);
227 static ssize_t claw_rbuff_show(struct device *dev,
228  struct device_attribute *attr, char *buf);
229 static ssize_t claw_rbuff_write(struct device *dev,
230  struct device_attribute *attr,
231  const char *buf, size_t count);
232 
233 /* Functions for System Validate */
234 static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
235 static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
236  __u8 correlator, __u8 rc , char *local_name, char *remote_name);
237 static int claw_snd_conn_req(struct net_device *dev, __u8 link);
238 static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
239 static int claw_snd_sys_validate_rsp(struct net_device *dev,
240  struct clawctl * p_ctl, __u32 return_code);
241 static int claw_strt_conn_req(struct net_device *dev );
242 static void claw_strt_read(struct net_device *dev, int lock);
243 static void claw_strt_out_IO(struct net_device *dev);
244 static void claw_free_wrt_buf(struct net_device *dev);
245 
246 /* Functions for unpack reads */
247 static void unpack_read(struct net_device *dev);
248 
249 static int claw_pm_prepare(struct ccwgroup_device *gdev)
250 {
251  return -EPERM;
252 }
253 
254 /* the root device for claw group devices */
255 static struct device *claw_root_dev;
256 
257 /* ccwgroup table */
258 
259 static struct ccwgroup_driver claw_group_driver = {
260  .driver = {
261  .owner = THIS_MODULE,
262  .name = "claw",
263  },
264  .setup = claw_probe,
265  .remove = claw_remove_device,
266  .set_online = claw_new_device,
267  .set_offline = claw_shutdown_device,
268  .prepare = claw_pm_prepare,
269 };
270 
271 static struct ccw_device_id claw_ids[] = {
272  {CCW_DEVICE(0x3088, 0x61), .driver_info = claw_channel_type_claw},
273  {},
274 };
275 MODULE_DEVICE_TABLE(ccw, claw_ids);
276 
277 static struct ccw_driver claw_ccw_driver = {
278  .driver = {
279  .owner = THIS_MODULE,
280  .name = "claw",
281  },
282  .ids = claw_ids,
283  .probe = ccwgroup_probe_ccwdev,
284  .remove = ccwgroup_remove_ccwdev,
285  .int_class = IOINT_CLW,
286 };
287 
288 static ssize_t claw_driver_group_store(struct device_driver *ddrv,
289  const char *buf, size_t count)
290 {
291  int err;
292  err = ccwgroup_create_dev(claw_root_dev, &claw_group_driver, 2, buf);
293  return err ? err : count;
294 }
295 static DRIVER_ATTR(group, 0200, NULL, claw_driver_group_store);
296 
297 static struct attribute *claw_drv_attrs[] = {
298  &driver_attr_group.attr,
299  NULL,
300 };
301 static struct attribute_group claw_drv_attr_group = {
302  .attrs = claw_drv_attrs,
303 };
304 static const struct attribute_group *claw_drv_attr_groups[] = {
305  &claw_drv_attr_group,
306  NULL,
307 };
308 
309 /*
310 * Key functions
311 */
312 
313 /*-------------------------------------------------------------------*
314  * claw_tx *
315  *-------------------------------------------------------------------*/
316 
317 static int
318 claw_tx(struct sk_buff *skb, struct net_device *dev)
319 {
320  int rc;
321  struct claw_privbk *privptr = dev->ml_priv;
322  unsigned long saveflags;
323  struct chbk *p_ch;
324 
325  CLAW_DBF_TEXT(4, trace, "claw_tx");
326  p_ch = &privptr->channel[WRITE_CHANNEL];
327  spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
328  rc=claw_hw_tx( skb, dev, 1 );
329  spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
330  CLAW_DBF_TEXT_(4, trace, "clawtx%d", rc);
331  if (rc)
332  rc = NETDEV_TX_BUSY;
333  else
334  rc = NETDEV_TX_OK;
335  return rc;
336 } /* end of claw_tx */
337 
338 /*------------------------------------------------------------------*
339  * pack the collect queue into an skb and return it *
340  * If not packing just return the top skb from the queue *
341  *------------------------------------------------------------------*/
342 
343 static struct sk_buff *
344 claw_pack_skb(struct claw_privbk *privptr)
345 {
346  struct sk_buff *new_skb,*held_skb;
347  struct chbk *p_ch = &privptr->channel[WRITE_CHANNEL];
348  struct claw_env *p_env = privptr->p_env;
349  int pkt_cnt,pk_ind,so_far;
350 
351  new_skb = NULL; /* assume no dice */
352  pkt_cnt = 0;
353  CLAW_DBF_TEXT(4, trace, "PackSKBe");
354  if (!skb_queue_empty(&p_ch->collect_queue)) {
355  /* some data */
356  held_skb = skb_dequeue(&p_ch->collect_queue);
357  if (held_skb)
358  dev_kfree_skb_any(held_skb);
359  else
360  return NULL;
361  if (p_env->packing != DO_PACKED)
362  return held_skb;
363  /* get a new SKB we will pack at least one */
364  new_skb = dev_alloc_skb(p_env->write_size);
365  if (new_skb == NULL) {
366  atomic_inc(&held_skb->users);
367  skb_queue_head(&p_ch->collect_queue,held_skb);
368  return NULL;
369  }
370  /* we have packed packet and a place to put it */
371  pk_ind = 1;
372  so_far = 0;
373  new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
374  while ((pk_ind) && (held_skb != NULL)) {
375  if (held_skb->len+so_far <= p_env->write_size-8) {
376  memcpy(skb_put(new_skb,held_skb->len),
377  held_skb->data,held_skb->len);
378  privptr->stats.tx_packets++;
379  so_far += held_skb->len;
380  pkt_cnt++;
381  dev_kfree_skb_any(held_skb);
382  held_skb = skb_dequeue(&p_ch->collect_queue);
383  if (held_skb)
384  atomic_dec(&held_skb->users);
385  } else {
386  pk_ind = 0;
387  atomic_inc(&held_skb->users);
388  skb_queue_head(&p_ch->collect_queue,held_skb);
389  }
390  }
391  }
392  CLAW_DBF_TEXT(4, trace, "PackSKBx");
393  return new_skb;
394 }
395 
396 /*-------------------------------------------------------------------*
397  * claw_change_mtu *
398  * *
399  *-------------------------------------------------------------------*/
400 
401 static int
402 claw_change_mtu(struct net_device *dev, int new_mtu)
403 {
404  struct claw_privbk *privptr = dev->ml_priv;
405  int buff_size;
406  CLAW_DBF_TEXT(4, trace, "setmtu");
407  buff_size = privptr->p_env->write_size;
408  if ((new_mtu < 60) || (new_mtu > buff_size)) {
409  return -EINVAL;
410  }
411  dev->mtu = new_mtu;
412  return 0;
413 } /* end of claw_change_mtu */
414 
415 
416 /*-------------------------------------------------------------------*
417  * claw_open *
418  * *
419  *-------------------------------------------------------------------*/
420 static int
421 claw_open(struct net_device *dev)
422 {
423 
424  int rc;
425  int i;
426  unsigned long saveflags=0;
427  unsigned long parm;
428  struct claw_privbk *privptr;
429  DECLARE_WAITQUEUE(wait, current);
430  struct timer_list timer;
431  struct ccwbk *p_buf;
432 
433  CLAW_DBF_TEXT(4, trace, "open");
434  privptr = (struct claw_privbk *)dev->ml_priv;
435  /* allocate and initialize CCW blocks */
436  if (privptr->buffs_alloc == 0) {
437  rc=init_ccw_bk(dev);
438  if (rc) {
439  CLAW_DBF_TEXT(2, trace, "openmem");
440  return -ENOMEM;
441  }
442  }
443  privptr->system_validate_comp=0;
444  privptr->release_pend=0;
445  if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
446  privptr->p_env->read_size=DEF_PACK_BUFSIZE;
447  privptr->p_env->write_size=DEF_PACK_BUFSIZE;
448  privptr->p_env->packing=PACKING_ASK;
449  } else {
450  privptr->p_env->packing=0;
451  privptr->p_env->read_size=CLAW_FRAME_SIZE;
452  privptr->p_env->write_size=CLAW_FRAME_SIZE;
453  }
454  claw_set_busy(dev);
455  tasklet_init(&privptr->channel[READ_CHANNEL].tasklet, claw_irq_tasklet,
456  (unsigned long) &privptr->channel[READ_CHANNEL]);
457  for ( i = 0; i < 2; i++) {
458  CLAW_DBF_TEXT_(2, trace, "opn_ch%d", i);
459  init_waitqueue_head(&privptr->channel[i].wait);
460  /* skb_queue_head_init(&p_ch->io_queue); */
461  if (i == WRITE_CHANNEL)
462  skb_queue_head_init(
463  &privptr->channel[WRITE_CHANNEL].collect_queue);
464  privptr->channel[i].flag_a = 0;
465  privptr->channel[i].IO_active = 0;
466  privptr->channel[i].flag &= ~CLAW_TIMER;
467  init_timer(&timer);
468  timer.function = (void *)claw_timer;
469  timer.data = (unsigned long)(&privptr->channel[i]);
470  timer.expires = jiffies + 15*HZ;
471  add_timer(&timer);
472  spin_lock_irqsave(get_ccwdev_lock(
473  privptr->channel[i].cdev), saveflags);
474  parm = (unsigned long) &privptr->channel[i];
475  privptr->channel[i].claw_state = CLAW_START_HALT_IO;
476  rc = 0;
477  add_wait_queue(&privptr->channel[i].wait, &wait);
478  rc = ccw_device_halt(
479  (struct ccw_device *)privptr->channel[i].cdev,parm);
480  set_current_state(TASK_INTERRUPTIBLE);
481  spin_unlock_irqrestore(
482  get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
483  schedule();
484  set_current_state(TASK_RUNNING);
485  remove_wait_queue(&privptr->channel[i].wait, &wait);
486  if(rc != 0)
487  ccw_check_return_code(privptr->channel[i].cdev, rc);
488  if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
489  del_timer(&timer);
490  }
491  if ((((privptr->channel[READ_CHANNEL].last_dstat |
492  privptr->channel[WRITE_CHANNEL].last_dstat) &
493  ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
494  (((privptr->channel[READ_CHANNEL].flag |
495  privptr->channel[WRITE_CHANNEL].flag) & CLAW_TIMER) != 0x00)) {
496  dev_info(&privptr->channel[READ_CHANNEL].cdev->dev,
497  "%s: remote side is not ready\n", dev->name);
498  CLAW_DBF_TEXT(2, trace, "notrdy");
499 
500  for ( i = 0; i < 2; i++) {
501  spin_lock_irqsave(
502  get_ccwdev_lock(privptr->channel[i].cdev),
503  saveflags);
504  parm = (unsigned long) &privptr->channel[i];
505  privptr->channel[i].claw_state = CLAW_STOP;
506  rc = ccw_device_halt(
507  (struct ccw_device *)&privptr->channel[i].cdev,
508  parm);
509  spin_unlock_irqrestore(
510  get_ccwdev_lock(privptr->channel[i].cdev),
511  saveflags);
512  if (rc != 0) {
513  ccw_check_return_code(
514  privptr->channel[i].cdev, rc);
515  }
516  }
517  free_pages((unsigned long)privptr->p_buff_ccw,
518  (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
519  if (privptr->p_env->read_size < PAGE_SIZE) {
520  free_pages((unsigned long)privptr->p_buff_read,
521  (int)pages_to_order_of_mag(
522  privptr->p_buff_read_num));
523  }
524  else {
525  p_buf=privptr->p_read_active_first;
526  while (p_buf!=NULL) {
527  free_pages((unsigned long)p_buf->p_buffer,
528  (int)pages_to_order_of_mag(
529  privptr->p_buff_pages_perread ));
530  p_buf=p_buf->next;
531  }
532  }
533  if (privptr->p_env->write_size < PAGE_SIZE ) {
534  free_pages((unsigned long)privptr->p_buff_write,
535  (int)pages_to_order_of_mag(
536  privptr->p_buff_write_num));
537  }
538  else {
539  p_buf=privptr->p_write_active_first;
540  while (p_buf!=NULL) {
541  free_pages((unsigned long)p_buf->p_buffer,
542  (int)pages_to_order_of_mag(
543  privptr->p_buff_pages_perwrite ));
544  p_buf=p_buf->next;
545  }
546  }
547  privptr->buffs_alloc = 0;
548  privptr->channel[READ_CHANNEL].flag = 0x00;
549  privptr->channel[WRITE_CHANNEL].flag = 0x00;
550  privptr->p_buff_ccw=NULL;
551  privptr->p_buff_read=NULL;
552  privptr->p_buff_write=NULL;
553  claw_clear_busy(dev);
554  CLAW_DBF_TEXT(2, trace, "open EIO");
555  return -EIO;
556  }
557 
558  /* Send SystemValidate command */
559 
560  claw_clear_busy(dev);
561  CLAW_DBF_TEXT(4, trace, "openok");
562  return 0;
563 } /* end of claw_open */
564 
565 /*-------------------------------------------------------------------*
566 * *
567 * claw_irq_handler *
568 * *
569 *--------------------------------------------------------------------*/
570 static void
571 claw_irq_handler(struct ccw_device *cdev,
572  unsigned long intparm, struct irb *irb)
573 {
574  struct chbk *p_ch = NULL;
575  struct claw_privbk *privptr = NULL;
576  struct net_device *dev = NULL;
577  struct claw_env *p_env;
578  struct chbk *p_ch_r=NULL;
579 
580  CLAW_DBF_TEXT(4, trace, "clawirq");
581  /* Bypass all 'unsolicited interrupts' */
582  privptr = dev_get_drvdata(&cdev->dev);
583  if (!privptr) {
584  dev_warn(&cdev->dev, "An uninitialized CLAW device received an"
585  " IRQ, c-%02x d-%02x\n",
586  irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
587  CLAW_DBF_TEXT(2, trace, "badirq");
588  return;
589  }
590 
591  /* Try to extract channel from driver data. */
592  if (privptr->channel[READ_CHANNEL].cdev == cdev)
593  p_ch = &privptr->channel[READ_CHANNEL];
594  else if (privptr->channel[WRITE_CHANNEL].cdev == cdev)
595  p_ch = &privptr->channel[WRITE_CHANNEL];
596  else {
597  dev_warn(&cdev->dev, "The device is not a CLAW device\n");
598  CLAW_DBF_TEXT(2, trace, "badchan");
599  return;
600  }
601  CLAW_DBF_TEXT_(4, trace, "IRQCH=%d", p_ch->flag);
602 
603  dev = (struct net_device *) (p_ch->ndev);
604  p_env=privptr->p_env;
605 
606  /* Copy interruption response block. */
607  memcpy(p_ch->irb, irb, sizeof(struct irb));
608 
609  /* Check for good subchannel return code, otherwise info message */
610  if (irb->scsw.cmd.cstat && !(irb->scsw.cmd.cstat & SCHN_STAT_PCI)) {
611  dev_info(&cdev->dev,
612  "%s: subchannel check for device: %04x -"
613  " Sch Stat %02x Dev Stat %02x CPA - %04x\n",
614  dev->name, p_ch->devno,
615  irb->scsw.cmd.cstat, irb->scsw.cmd.dstat,
616  irb->scsw.cmd.cpa);
617  CLAW_DBF_TEXT(2, trace, "chanchk");
618  /* return; */
619  }
620 
621  /* Check the reason-code of a unit check */
622  if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
623  ccw_check_unit_check(p_ch, irb->ecw[0]);
624 
625  /* State machine to bring the connection up, down and to restart */
626  p_ch->last_dstat = irb->scsw.cmd.dstat;
627 
628  switch (p_ch->claw_state) {
629  case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
630  if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
631  (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
632  (p_ch->irb->scsw.cmd.stctl ==
633  (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND))))
634  return;
635  wake_up(&p_ch->wait); /* wake up claw_release */
636  CLAW_DBF_TEXT(4, trace, "stop");
637  return;
638  case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open */
639  if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
640  (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
641  (p_ch->irb->scsw.cmd.stctl ==
642  (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
643  CLAW_DBF_TEXT(4, trace, "haltio");
644  return;
645  }
646  if (p_ch->flag == CLAW_READ) {
647  p_ch->claw_state = CLAW_START_READ;
648  wake_up(&p_ch->wait); /* wake claw_open (READ)*/
649  } else if (p_ch->flag == CLAW_WRITE) {
650  p_ch->claw_state = CLAW_START_WRITE;
651  /* send SYSTEM_VALIDATE */
652  claw_strt_read(dev, LOCK_NO);
653  claw_send_control(dev,
654  SYSTEM_VALIDATE_REQUEST,
655  0, 0, 0,
656  p_env->host_name,
657  p_env->adapter_name);
658  } else {
659  dev_warn(&cdev->dev, "The CLAW device received"
660  " an unexpected IRQ, "
661  "c-%02x d-%02x\n",
662  irb->scsw.cmd.cstat,
663  irb->scsw.cmd.dstat);
664  return;
665  }
666  CLAW_DBF_TEXT(4, trace, "haltio");
667  return;
668  case CLAW_START_READ:
669  CLAW_DBF_TEXT(4, trace, "ReadIRQ");
670  if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
671  clear_bit(0, (void *)&p_ch->IO_active);
672  if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
673  (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
674  (p_ch->irb->ecw[0]) == 0) {
675  privptr->stats.rx_errors++;
676  dev_info(&cdev->dev,
677  "%s: Restart is required after remote "
678  "side recovers \n",
679  dev->name);
680  }
681  CLAW_DBF_TEXT(4, trace, "notrdy");
682  return;
683  }
684  if ((p_ch->irb->scsw.cmd.cstat & SCHN_STAT_PCI) &&
685  (p_ch->irb->scsw.cmd.dstat == 0)) {
686  if (test_and_set_bit(CLAW_BH_ACTIVE,
687  (void *)&p_ch->flag_a) == 0)
688  tasklet_schedule(&p_ch->tasklet);
689  else
690  CLAW_DBF_TEXT(4, trace, "PCINoBH");
691  CLAW_DBF_TEXT(4, trace, "PCI_read");
692  return;
693  }
694  if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
695  (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
696  (p_ch->irb->scsw.cmd.stctl ==
697  (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
698  CLAW_DBF_TEXT(4, trace, "SPend_rd");
699  return;
700  }
701  clear_bit(0, (void *)&p_ch->IO_active);
702  claw_clearbit_busy(TB_RETRY, dev);
703  if (test_and_set_bit(CLAW_BH_ACTIVE,
704  (void *)&p_ch->flag_a) == 0)
705  tasklet_schedule(&p_ch->tasklet);
706  else
707  CLAW_DBF_TEXT(4, trace, "RdBHAct");
708  CLAW_DBF_TEXT(4, trace, "RdIRQXit");
709  return;
710  case CLAW_START_WRITE:
711  if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
712  dev_info(&cdev->dev,
713  "%s: Unit Check Occurred in "
714  "write channel\n", dev->name);
715  clear_bit(0, (void *)&p_ch->IO_active);
716  if (p_ch->irb->ecw[0] & 0x80) {
717  dev_info(&cdev->dev,
718  "%s: Resetting Event "
719  "occurred:\n", dev->name);
720  init_timer(&p_ch->timer);
721  p_ch->timer.function =
722  (void *)claw_write_retry;
723  p_ch->timer.data = (unsigned long)p_ch;
724  p_ch->timer.expires = jiffies + 10*HZ;
725  add_timer(&p_ch->timer);
726  dev_info(&cdev->dev,
727  "%s: write connection "
728  "restarting\n", dev->name);
729  }
730  CLAW_DBF_TEXT(4, trace, "rstrtwrt");
731  return;
732  }
733  if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) {
734  clear_bit(0, (void *)&p_ch->IO_active);
735  dev_info(&cdev->dev,
736  "%s: Unit Exception "
737  "occurred in write channel\n",
738  dev->name);
739  }
740  if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
741  (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
742  (p_ch->irb->scsw.cmd.stctl ==
743  (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
744  CLAW_DBF_TEXT(4, trace, "writeUE");
745  return;
746  }
747  clear_bit(0, (void *)&p_ch->IO_active);
748  if (claw_test_and_setbit_busy(TB_TX, dev) == 0) {
749  claw_write_next(p_ch);
750  claw_clearbit_busy(TB_TX, dev);
751  claw_clear_busy(dev);
752  }
753  p_ch_r = (struct chbk *)&privptr->channel[READ_CHANNEL];
754  if (test_and_set_bit(CLAW_BH_ACTIVE,
755  (void *)&p_ch_r->flag_a) == 0)
756  tasklet_schedule(&p_ch_r->tasklet);
757  CLAW_DBF_TEXT(4, trace, "StWtExit");
758  return;
759  default:
760  dev_warn(&cdev->dev,
761  "The CLAW device for %s received an unexpected IRQ\n",
762  dev->name);
763  CLAW_DBF_TEXT(2, trace, "badIRQ");
764  return;
765  }
766 
767 } /* end of claw_irq_handler */
768 
769 
770 /*-------------------------------------------------------------------*
771 * claw_irq_tasklet *
772 * *
773 *--------------------------------------------------------------------*/
774 static void
775 claw_irq_tasklet ( unsigned long data )
776 {
777  struct chbk * p_ch;
778  struct net_device *dev;
779 
780  p_ch = (struct chbk *) data;
781  dev = (struct net_device *)p_ch->ndev;
782  CLAW_DBF_TEXT(4, trace, "IRQtask");
783  unpack_read(dev);
784  clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
785  CLAW_DBF_TEXT(4, trace, "TskletXt");
786  return;
787 } /* end of claw_irq_bh */
788 
789 /*-------------------------------------------------------------------*
790 * claw_release *
791 * *
792 *--------------------------------------------------------------------*/
793 static int
794 claw_release(struct net_device *dev)
795 {
796  int rc;
797  int i;
798  unsigned long saveflags;
799  unsigned long parm;
800  struct claw_privbk *privptr;
801  DECLARE_WAITQUEUE(wait, current);
802  struct ccwbk* p_this_ccw;
803  struct ccwbk* p_buf;
804 
805  if (!dev)
806  return 0;
807  privptr = (struct claw_privbk *)dev->ml_priv;
808  if (!privptr)
809  return 0;
810  CLAW_DBF_TEXT(4, trace, "release");
811  privptr->release_pend=1;
812  claw_setbit_busy(TB_STOP,dev);
813  for ( i = 1; i >=0 ; i--) {
814  spin_lock_irqsave(
815  get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
816  /* del_timer(&privptr->channel[READ_CHANNEL].timer); */
817  privptr->channel[i].claw_state = CLAW_STOP;
818  privptr->channel[i].IO_active = 0;
819  parm = (unsigned long) &privptr->channel[i];
820  if (i == WRITE_CHANNEL)
821  claw_purge_skb_queue(
822  &privptr->channel[WRITE_CHANNEL].collect_queue);
823  rc = ccw_device_halt (privptr->channel[i].cdev, parm);
824  if (privptr->system_validate_comp==0x00) /* never opened? */
825  init_waitqueue_head(&privptr->channel[i].wait);
826  add_wait_queue(&privptr->channel[i].wait, &wait);
827  set_current_state(TASK_INTERRUPTIBLE);
828  spin_unlock_irqrestore(
829  get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
830  schedule();
831  set_current_state(TASK_RUNNING);
832  remove_wait_queue(&privptr->channel[i].wait, &wait);
833  if (rc != 0) {
834  ccw_check_return_code(privptr->channel[i].cdev, rc);
835  }
836  }
837  if (privptr->pk_skb != NULL) {
838  dev_kfree_skb_any(privptr->pk_skb);
839  privptr->pk_skb = NULL;
840  }
841  if(privptr->buffs_alloc != 1) {
842  CLAW_DBF_TEXT(4, trace, "none2fre");
843  return 0;
844  }
845  CLAW_DBF_TEXT(4, trace, "freebufs");
846  if (privptr->p_buff_ccw != NULL) {
847  free_pages((unsigned long)privptr->p_buff_ccw,
848  (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
849  }
850  CLAW_DBF_TEXT(4, trace, "freeread");
851  if (privptr->p_env->read_size < PAGE_SIZE) {
852  if (privptr->p_buff_read != NULL) {
853  free_pages((unsigned long)privptr->p_buff_read,
854  (int)pages_to_order_of_mag(privptr->p_buff_read_num));
855  }
856  }
857  else {
858  p_buf=privptr->p_read_active_first;
859  while (p_buf!=NULL) {
860  free_pages((unsigned long)p_buf->p_buffer,
861  (int)pages_to_order_of_mag(
862  privptr->p_buff_pages_perread ));
863  p_buf=p_buf->next;
864  }
865  }
866  CLAW_DBF_TEXT(4, trace, "freewrit");
867  if (privptr->p_env->write_size < PAGE_SIZE ) {
868  free_pages((unsigned long)privptr->p_buff_write,
869  (int)pages_to_order_of_mag(privptr->p_buff_write_num));
870  }
871  else {
872  p_buf=privptr->p_write_active_first;
873  while (p_buf!=NULL) {
874  free_pages((unsigned long)p_buf->p_buffer,
875  (int)pages_to_order_of_mag(
876  privptr->p_buff_pages_perwrite ));
877  p_buf=p_buf->next;
878  }
879  }
880  CLAW_DBF_TEXT(4, trace, "clearptr");
881  privptr->buffs_alloc = 0;
882  privptr->p_buff_ccw=NULL;
883  privptr->p_buff_read=NULL;
884  privptr->p_buff_write=NULL;
885  privptr->system_validate_comp=0;
886  privptr->release_pend=0;
887  /* Remove any writes that were pending and reset all reads */
888  p_this_ccw=privptr->p_read_active_first;
889  while (p_this_ccw!=NULL) {
890  p_this_ccw->header.length=0xffff;
891  p_this_ccw->header.opcode=0xff;
892  p_this_ccw->header.flag=0x00;
893  p_this_ccw=p_this_ccw->next;
894  }
895 
896  while (privptr->p_write_active_first!=NULL) {
897  p_this_ccw=privptr->p_write_active_first;
898  p_this_ccw->header.flag=CLAW_PENDING;
899  privptr->p_write_active_first=p_this_ccw->next;
900  p_this_ccw->next=privptr->p_write_free_chain;
901  privptr->p_write_free_chain=p_this_ccw;
902  ++privptr->write_free_count;
903  }
904  privptr->p_write_active_last=NULL;
905  privptr->mtc_logical_link = -1;
906  privptr->mtc_skipping = 1;
907  privptr->mtc_offset=0;
908 
909  if (((privptr->channel[READ_CHANNEL].last_dstat |
910  privptr->channel[WRITE_CHANNEL].last_dstat) &
911  ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
912  dev_warn(&privptr->channel[READ_CHANNEL].cdev->dev,
913  "Deactivating %s completed with incorrect"
914  " subchannel status "
915  "(read %02x, write %02x)\n",
916  dev->name,
917  privptr->channel[READ_CHANNEL].last_dstat,
918  privptr->channel[WRITE_CHANNEL].last_dstat);
919  CLAW_DBF_TEXT(2, trace, "badclose");
920  }
921  CLAW_DBF_TEXT(4, trace, "rlsexit");
922  return 0;
923 } /* end of claw_release */
924 
925 /*-------------------------------------------------------------------*
926 * claw_write_retry *
927 * *
928 *--------------------------------------------------------------------*/
929 
930 static void
931 claw_write_retry ( struct chbk *p_ch )
932 {
933 
934  struct net_device *dev=p_ch->ndev;
935 
936  CLAW_DBF_TEXT(4, trace, "w_retry");
937  if (p_ch->claw_state == CLAW_STOP) {
938  return;
939  }
940  claw_strt_out_IO( dev );
941  CLAW_DBF_TEXT(4, trace, "rtry_xit");
942  return;
943 } /* end of claw_write_retry */
944 
945 
946 /*-------------------------------------------------------------------*
947 * claw_write_next *
948 * *
949 *--------------------------------------------------------------------*/
950 
951 static void
952 claw_write_next ( struct chbk * p_ch )
953 {
954 
955  struct net_device *dev;
956  struct claw_privbk *privptr=NULL;
957  struct sk_buff *pk_skb;
958 
959  CLAW_DBF_TEXT(4, trace, "claw_wrt");
960  if (p_ch->claw_state == CLAW_STOP)
961  return;
962  dev = (struct net_device *) p_ch->ndev;
963  privptr = (struct claw_privbk *) dev->ml_priv;
964  claw_free_wrt_buf( dev );
965  if ((privptr->write_free_count > 0) &&
966  !skb_queue_empty(&p_ch->collect_queue)) {
967  pk_skb = claw_pack_skb(privptr);
968  while (pk_skb != NULL) {
969  claw_hw_tx(pk_skb, dev, 1);
970  if (privptr->write_free_count > 0) {
971  pk_skb = claw_pack_skb(privptr);
972  } else
973  pk_skb = NULL;
974  }
975  }
976  if (privptr->p_write_active_first!=NULL) {
977  claw_strt_out_IO(dev);
978  }
979  return;
980 } /* end of claw_write_next */
981 
982 /*-------------------------------------------------------------------*
983 * *
984 * claw_timer *
985 *--------------------------------------------------------------------*/
986 
987 static void
988 claw_timer ( struct chbk * p_ch )
989 {
990  CLAW_DBF_TEXT(4, trace, "timer");
991  p_ch->flag |= CLAW_TIMER;
992  wake_up(&p_ch->wait);
993  return;
994 } /* end of claw_timer */
995 
996 /*
997 *
998 * functions
999 */
1000 
1001 
1002 /*-------------------------------------------------------------------*
1003 * *
1004 * pages_to_order_of_mag *
1005 * *
1006 * takes a number of pages from 1 to 512 and returns the *
1007 * log(num_pages)/log(2) get_free_pages() needs a base 2 order *
1008 * of magnitude get_free_pages() has an upper order of 9 *
1009 *--------------------------------------------------------------------*/
1010 
1011 static int
1012 pages_to_order_of_mag(int num_of_pages)
1013 {
1014  int order_of_mag=1; /* assume 2 pages */
1015  int nump;
1016 
1017  CLAW_DBF_TEXT_(5, trace, "pages%d", num_of_pages);
1018  if (num_of_pages == 1) {return 0; } /* magnitude of 0 = 1 page */
1019  /* 512 pages = 2Meg on 4k page systems */
1020  if (num_of_pages >= 512) {return 9; }
1021  /* we have two or more pages order is at least 1 */
1022  for (nump=2 ;nump <= 512;nump*=2) {
1023  if (num_of_pages <= nump)
1024  break;
1025  order_of_mag +=1;
1026  }
1027  if (order_of_mag > 9) { order_of_mag = 9; } /* I know it's paranoid */
1028  CLAW_DBF_TEXT_(5, trace, "mag%d", order_of_mag);
1029  return order_of_mag;
1030 }
1031 
1032 /*-------------------------------------------------------------------*
1033 * *
1034 * add_claw_reads *
1035 * *
1036 *--------------------------------------------------------------------*/
1037 static int
1038 add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
1039  struct ccwbk* p_last)
1040 {
1041  struct claw_privbk *privptr;
1042  struct ccw1 temp_ccw;
1043  struct endccw * p_end;
1044  CLAW_DBF_TEXT(4, trace, "addreads");
1045  privptr = dev->ml_priv;
1046  p_end = privptr->p_end_ccw;
1047 
1048  /* first CCW and last CCW contains a new set of read channel programs
1049  * to apend the running channel programs
1050  */
1051  if ( p_first==NULL) {
1052  CLAW_DBF_TEXT(4, trace, "addexit");
1053  return 0;
1054  }
1055 
1056  /* set up ending CCW sequence for this segment */
1057  if (p_end->read1) {
1058  p_end->read1=0x00; /* second ending CCW is now active */
1059  /* reset ending CCWs and setup TIC CCWs */
1060  p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1061  p_end->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1062  p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
1063  p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
1064  p_end->read2_nop2.cda=0;
1065  p_end->read2_nop2.count=1;
1066  }
1067  else {
1068  p_end->read1=0x01; /* first ending CCW is now active */
1069  /* reset ending CCWs and setup TIC CCWs */
1070  p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1071  p_end->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1072  p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
1073  p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
1074  p_end->read1_nop2.cda=0;
1075  p_end->read1_nop2.count=1;
1076  }
1077 
1078  if ( privptr-> p_read_active_first ==NULL ) {
1079  privptr->p_read_active_first = p_first; /* set new first */
1080  privptr->p_read_active_last = p_last; /* set new last */
1081  }
1082  else {
1083 
1084  /* set up TIC ccw */
1085  temp_ccw.cda= (__u32)__pa(&p_first->read);
1086  temp_ccw.count=0;
1087  temp_ccw.flags=0;
1088  temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
1089 
1090 
1091  if (p_end->read1) {
1092 
1093  /* first set of CCW's is chained to the new read */
1094  /* chain, so the second set is chained to the active chain. */
1095  /* Therefore modify the second set to point to the new */
1096  /* read chain set up TIC CCWs */
1097  /* make sure we update the CCW so channel doesn't fetch it */
1098  /* when it's only half done */
1099  memcpy( &p_end->read2_nop2, &temp_ccw ,
1100  sizeof(struct ccw1));
1101  privptr->p_read_active_last->r_TIC_1.cda=
1102  (__u32)__pa(&p_first->read);
1103  privptr->p_read_active_last->r_TIC_2.cda=
1104  (__u32)__pa(&p_first->read);
1105  }
1106  else {
1107  /* make sure we update the CCW so channel doesn't */
1108  /* fetch it when it is only half done */
1109  memcpy( &p_end->read1_nop2, &temp_ccw ,
1110  sizeof(struct ccw1));
1111  privptr->p_read_active_last->r_TIC_1.cda=
1112  (__u32)__pa(&p_first->read);
1113  privptr->p_read_active_last->r_TIC_2.cda=
1114  (__u32)__pa(&p_first->read);
1115  }
1116  /* chain in new set of blocks */
1117  privptr->p_read_active_last->next = p_first;
1118  privptr->p_read_active_last=p_last;
1119  } /* end of if ( privptr-> p_read_active_first ==NULL) */
1120  CLAW_DBF_TEXT(4, trace, "addexit");
1121  return 0;
1122 } /* end of add_claw_reads */
1123 
1124 /*-------------------------------------------------------------------*
1125  * ccw_check_return_code *
1126  * *
1127  *-------------------------------------------------------------------*/
1128 
1129 static void
1130 ccw_check_return_code(struct ccw_device *cdev, int return_code)
1131 {
1132  CLAW_DBF_TEXT(4, trace, "ccwret");
1133  if (return_code != 0) {
1134  switch (return_code) {
1135  case -EBUSY: /* BUSY is a transient state no action needed */
1136  break;
1137  case -ENODEV:
1138  dev_err(&cdev->dev, "The remote channel adapter is not"
1139  " available\n");
1140  break;
1141  case -EINVAL:
1142  dev_err(&cdev->dev,
1143  "The status of the remote channel adapter"
1144  " is not valid\n");
1145  break;
1146  default:
1147  dev_err(&cdev->dev, "The common device layer"
1148  " returned error code %d\n",
1149  return_code);
1150  }
1151  }
1152  CLAW_DBF_TEXT(4, trace, "ccwret");
1153 } /* end of ccw_check_return_code */
1154 
1155 /*-------------------------------------------------------------------*
1156 * ccw_check_unit_check *
1157 *--------------------------------------------------------------------*/
1158 
1159 static void
1160 ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
1161 {
1162  struct net_device *ndev = p_ch->ndev;
1163  struct device *dev = &p_ch->cdev->dev;
1164 
1165  CLAW_DBF_TEXT(4, trace, "unitchek");
1166  dev_warn(dev, "The communication peer of %s disconnected\n",
1167  ndev->name);
1168 
1169  if (sense & 0x40) {
1170  if (sense & 0x01) {
1171  dev_warn(dev, "The remote channel adapter for"
1172  " %s has been reset\n",
1173  ndev->name);
1174  }
1175  } else if (sense & 0x20) {
1176  if (sense & 0x04) {
1177  dev_warn(dev, "A data streaming timeout occurred"
1178  " for %s\n",
1179  ndev->name);
1180  } else if (sense & 0x10) {
1181  dev_warn(dev, "The remote channel adapter for %s"
1182  " is faulty\n",
1183  ndev->name);
1184  } else {
1185  dev_warn(dev, "A data transfer parity error occurred"
1186  " for %s\n",
1187  ndev->name);
1188  }
1189  } else if (sense & 0x10) {
1190  dev_warn(dev, "A read data parity error occurred"
1191  " for %s\n",
1192  ndev->name);
1193  }
1194 
1195 } /* end of ccw_check_unit_check */
1196 
1197 /*-------------------------------------------------------------------*
1198 * find_link *
1199 *--------------------------------------------------------------------*/
1200 static int
1201 find_link(struct net_device *dev, char *host_name, char *ws_name )
1202 {
1203  struct claw_privbk *privptr;
1204  struct claw_env *p_env;
1205  int rc=0;
1206 
1207  CLAW_DBF_TEXT(2, setup, "findlink");
1208  privptr = dev->ml_priv;
1209  p_env=privptr->p_env;
1210  switch (p_env->packing)
1211  {
1212  case PACKING_ASK:
1213  if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
1214  (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
1215  rc = EINVAL;
1216  break;
1217  case DO_PACKED:
1218  case PACK_SEND:
1219  if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
1220  (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
1221  rc = EINVAL;
1222  break;
1223  default:
1224  if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
1225  (memcmp(p_env->api_type , ws_name, 8)!=0))
1226  rc = EINVAL;
1227  break;
1228  }
1229 
1230  return rc;
1231 } /* end of find_link */
1232 
1233 /*-------------------------------------------------------------------*
1234  * claw_hw_tx *
1235  * *
1236  * *
1237  *-------------------------------------------------------------------*/
1238 
1239 static int
1240 claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
1241 {
1242  int rc=0;
1243  struct claw_privbk *privptr;
1244  struct ccwbk *p_this_ccw;
1245  struct ccwbk *p_first_ccw;
1246  struct ccwbk *p_last_ccw;
1247  __u32 numBuffers;
1248  signed long len_of_data;
1249  unsigned long bytesInThisBuffer;
1250  unsigned char *pDataAddress;
1251  struct endccw *pEnd;
1252  struct ccw1 tempCCW;
1253  struct claw_env *p_env;
1254  struct clawph *pk_head;
1255  struct chbk *ch;
1256 
1257  CLAW_DBF_TEXT(4, trace, "hw_tx");
1258  privptr = (struct claw_privbk *)(dev->ml_priv);
1259  p_env =privptr->p_env;
1260  claw_free_wrt_buf(dev); /* Clean up free chain if posible */
1261  /* scan the write queue to free any completed write packets */
1262  p_first_ccw=NULL;
1263  p_last_ccw=NULL;
1264  if ((p_env->packing >= PACK_SEND) &&
1265  (skb->cb[1] != 'P')) {
1266  skb_push(skb,sizeof(struct clawph));
1267  pk_head=(struct clawph *)skb->data;
1268  pk_head->len=skb->len-sizeof(struct clawph);
1269  if (pk_head->len%4) {
1270  pk_head->len+= 4-(pk_head->len%4);
1271  skb_pad(skb,4-(pk_head->len%4));
1272  skb_put(skb,4-(pk_head->len%4));
1273  }
1274  if (p_env->packing == DO_PACKED)
1275  pk_head->link_num = linkid;
1276  else
1277  pk_head->link_num = 0;
1278  pk_head->flag = 0x00;
1279  skb_pad(skb,4);
1280  skb->cb[1] = 'P';
1281  }
1282  if (linkid == 0) {
1283  if (claw_check_busy(dev)) {
1284  if (privptr->write_free_count!=0) {
1285  claw_clear_busy(dev);
1286  }
1287  else {
1288  claw_strt_out_IO(dev );
1289  claw_free_wrt_buf( dev );
1290  if (privptr->write_free_count==0) {
1291  ch = &privptr->channel[WRITE_CHANNEL];
1292  atomic_inc(&skb->users);
1293  skb_queue_tail(&ch->collect_queue, skb);
1294  goto Done;
1295  }
1296  else {
1297  claw_clear_busy(dev);
1298  }
1299  }
1300  }
1301  /* tx lock */
1302  if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
1303  ch = &privptr->channel[WRITE_CHANNEL];
1304  atomic_inc(&skb->users);
1305  skb_queue_tail(&ch->collect_queue, skb);
1306  claw_strt_out_IO(dev );
1307  rc=-EBUSY;
1308  goto Done2;
1309  }
1310  }
1311  /* See how many write buffers are required to hold this data */
1312  numBuffers = DIV_ROUND_UP(skb->len, privptr->p_env->write_size);
1313 
1314  /* If that number of buffers isn't available, give up for now */
1315  if (privptr->write_free_count < numBuffers ||
1316  privptr->p_write_free_chain == NULL ) {
1317 
1318  claw_setbit_busy(TB_NOBUFFER,dev);
1319  ch = &privptr->channel[WRITE_CHANNEL];
1320  atomic_inc(&skb->users);
1321  skb_queue_tail(&ch->collect_queue, skb);
1322  CLAW_DBF_TEXT(2, trace, "clawbusy");
1323  goto Done2;
1324  }
1325  pDataAddress=skb->data;
1326  len_of_data=skb->len;
1327 
1328  while (len_of_data > 0) {
1329  p_this_ccw=privptr->p_write_free_chain; /* get a block */
1330  if (p_this_ccw == NULL) { /* lost the race */
1331  ch = &privptr->channel[WRITE_CHANNEL];
1332  atomic_inc(&skb->users);
1333  skb_queue_tail(&ch->collect_queue, skb);
1334  goto Done2;
1335  }
1336  privptr->p_write_free_chain=p_this_ccw->next;
1337  p_this_ccw->next=NULL;
1338  --privptr->write_free_count; /* -1 */
1339  if (len_of_data >= privptr->p_env->write_size)
1340  bytesInThisBuffer = privptr->p_env->write_size;
1341  else
1342  bytesInThisBuffer = len_of_data;
1343  memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
1344  len_of_data-=bytesInThisBuffer;
1345  pDataAddress+=(unsigned long)bytesInThisBuffer;
1346  /* setup write CCW */
1347  p_this_ccw->write.cmd_code = (linkid * 8) +1;
1348  if (len_of_data>0) {
1349  p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
1350  }
1351  p_this_ccw->write.count=bytesInThisBuffer;
1352  /* now add to end of this chain */
1353  if (p_first_ccw==NULL) {
1354  p_first_ccw=p_this_ccw;
1355  }
1356  if (p_last_ccw!=NULL) {
1357  p_last_ccw->next=p_this_ccw;
1358  /* set up TIC ccws */
1359  p_last_ccw->w_TIC_1.cda=
1360  (__u32)__pa(&p_this_ccw->write);
1361  }
1362  p_last_ccw=p_this_ccw; /* save new last block */
1363  }
1364 
1365  /* FirstCCW and LastCCW now contain a new set of write channel
1366  * programs to append to the running channel program
1367  */
1368 
1369  if (p_first_ccw!=NULL) {
1370  /* setup ending ccw sequence for this segment */
1371  pEnd=privptr->p_end_ccw;
1372  if (pEnd->write1) {
1373  pEnd->write1=0x00; /* second end ccw is now active */
1374  /* set up Tic CCWs */
1375  p_last_ccw->w_TIC_1.cda=
1376  (__u32)__pa(&pEnd->write2_nop1);
1377  pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1378  pEnd->write2_nop2.flags =
1379  CCW_FLAG_SLI | CCW_FLAG_SKIP;
1380  pEnd->write2_nop2.cda=0;
1381  pEnd->write2_nop2.count=1;
1382  }
1383  else { /* end of if (pEnd->write1)*/
1384  pEnd->write1=0x01; /* first end ccw is now active */
1385  /* set up Tic CCWs */
1386  p_last_ccw->w_TIC_1.cda=
1387  (__u32)__pa(&pEnd->write1_nop1);
1388  pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1389  pEnd->write1_nop2.flags =
1390  CCW_FLAG_SLI | CCW_FLAG_SKIP;
1391  pEnd->write1_nop2.cda=0;
1392  pEnd->write1_nop2.count=1;
1393  } /* end if if (pEnd->write1) */
1394 
1395  if (privptr->p_write_active_first==NULL ) {
1396  privptr->p_write_active_first=p_first_ccw;
1397  privptr->p_write_active_last=p_last_ccw;
1398  }
1399  else {
1400  /* set up Tic CCWs */
1401 
1402  tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
1403  tempCCW.count=0;
1404  tempCCW.flags=0;
1405  tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
1406 
1407  if (pEnd->write1) {
1408 
1409  /*
1410  * first set of ending CCW's is chained to the new write
1411  * chain, so the second set is chained to the active chain
1412  * Therefore modify the second set to point the new write chain.
1413  * make sure we update the CCW atomically
1414  * so channel does not fetch it when it's only half done
1415  */
1416  memcpy( &pEnd->write2_nop2, &tempCCW ,
1417  sizeof(struct ccw1));
1418  privptr->p_write_active_last->w_TIC_1.cda=
1419  (__u32)__pa(&p_first_ccw->write);
1420  }
1421  else {
1422 
1423  /*make sure we update the CCW atomically
1424  *so channel does not fetch it when it's only half done
1425  */
1426  memcpy(&pEnd->write1_nop2, &tempCCW ,
1427  sizeof(struct ccw1));
1428  privptr->p_write_active_last->w_TIC_1.cda=
1429  (__u32)__pa(&p_first_ccw->write);
1430 
1431  } /* end if if (pEnd->write1) */
1432 
1433  privptr->p_write_active_last->next=p_first_ccw;
1434  privptr->p_write_active_last=p_last_ccw;
1435  }
1436 
1437  } /* endif (p_first_ccw!=NULL) */
1438  dev_kfree_skb_any(skb);
1439  claw_strt_out_IO(dev );
1440  /* if write free count is zero , set NOBUFFER */
1441  if (privptr->write_free_count==0) {
1442  claw_setbit_busy(TB_NOBUFFER,dev);
1443  }
1444 Done2:
1445  claw_clearbit_busy(TB_TX,dev);
1446 Done:
1447  return(rc);
1448 } /* end of claw_hw_tx */
1449 
1450 /*-------------------------------------------------------------------*
1451 * *
1452 * init_ccw_bk *
1453 * *
1454 *--------------------------------------------------------------------*/
1455 
1456 static int
1457 init_ccw_bk(struct net_device *dev)
1458 {
1459 
1460  __u32 ccw_blocks_required;
1461  __u32 ccw_blocks_perpage;
1462  __u32 ccw_pages_required;
1463  __u32 claw_reads_perpage=1;
1464  __u32 claw_read_pages;
1465  __u32 claw_writes_perpage=1;
1466  __u32 claw_write_pages;
1467  void *p_buff=NULL;
1468  struct ccwbk*p_free_chain;
1469  struct ccwbk*p_buf;
1470  struct ccwbk*p_last_CCWB;
1471  struct ccwbk*p_first_CCWB;
1472  struct endccw *p_endccw=NULL;
1473  addr_t real_address;
1474  struct claw_privbk *privptr = dev->ml_priv;
1475  struct clawh *pClawH=NULL;
1476  addr_t real_TIC_address;
1477  int i,j;
1478  CLAW_DBF_TEXT(4, trace, "init_ccw");
1479 
1480  /* initialize statistics field */
1481  privptr->active_link_ID=0;
1482  /* initialize ccwbk pointers */
1483  privptr->p_write_free_chain=NULL; /* pointer to free ccw chain*/
1484  privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
1485  privptr->p_write_active_last=NULL; /* pointer to the last write ccw*/
1486  privptr->p_read_active_first=NULL; /* pointer to the first read ccw*/
1487  privptr->p_read_active_last=NULL; /* pointer to the last read ccw */
1488  privptr->p_end_ccw=NULL; /* pointer to ending ccw */
1489  privptr->p_claw_signal_blk=NULL; /* pointer to signal block */
1490  privptr->buffs_alloc = 0;
1491  memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
1492  memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
1493  /* initialize free write ccwbk counter */
1494  privptr->write_free_count=0; /* number of free bufs on write chain */
1495  p_last_CCWB = NULL;
1496  p_first_CCWB= NULL;
1497  /*
1498  * We need 1 CCW block for each read buffer, 1 for each
1499  * write buffer, plus 1 for ClawSignalBlock
1500  */
1501  ccw_blocks_required =
1502  privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
1503  /*
1504  * compute number of CCW blocks that will fit in a page
1505  */
1506  ccw_blocks_perpage= PAGE_SIZE / CCWBK_SIZE;
1507  ccw_pages_required=
1508  DIV_ROUND_UP(ccw_blocks_required, ccw_blocks_perpage);
1509 
1510  /*
1511  * read and write sizes are set by 2 constants in claw.h
1512  * 4k and 32k. Unpacked values other than 4k are not going to
1513  * provide good performance. With packing buffers support 32k
1514  * buffers are used.
1515  */
1516  if (privptr->p_env->read_size < PAGE_SIZE) {
1517  claw_reads_perpage = PAGE_SIZE / privptr->p_env->read_size;
1518  claw_read_pages = DIV_ROUND_UP(privptr->p_env->read_buffers,
1519  claw_reads_perpage);
1520  }
1521  else { /* > or equal */
1522  privptr->p_buff_pages_perread =
1523  DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
1524  claw_read_pages = privptr->p_env->read_buffers *
1525  privptr->p_buff_pages_perread;
1526  }
1527  if (privptr->p_env->write_size < PAGE_SIZE) {
1528  claw_writes_perpage =
1529  PAGE_SIZE / privptr->p_env->write_size;
1530  claw_write_pages = DIV_ROUND_UP(privptr->p_env->write_buffers,
1531  claw_writes_perpage);
1532 
1533  }
1534  else { /* > or equal */
1535  privptr->p_buff_pages_perwrite =
1536  DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
1537  claw_write_pages = privptr->p_env->write_buffers *
1538  privptr->p_buff_pages_perwrite;
1539  }
1540  /*
1541  * allocate ccw_pages_required
1542  */
1543  if (privptr->p_buff_ccw==NULL) {
1544  privptr->p_buff_ccw=
1545  (void *)__get_free_pages(__GFP_DMA,
1546  (int)pages_to_order_of_mag(ccw_pages_required ));
1547  if (privptr->p_buff_ccw==NULL) {
1548  return -ENOMEM;
1549  }
1550  privptr->p_buff_ccw_num=ccw_pages_required;
1551  }
1552  memset(privptr->p_buff_ccw, 0x00,
1553  privptr->p_buff_ccw_num * PAGE_SIZE);
1554 
1555  /*
1556  * obtain ending ccw block address
1557  *
1558  */
1559  privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
1560  real_address = (__u32)__pa(privptr->p_end_ccw);
1561  /* Initialize ending CCW block */
1562  p_endccw=privptr->p_end_ccw;
1563  p_endccw->real=real_address;
1564  p_endccw->write1=0x00;
1565  p_endccw->read1=0x00;
1566 
1567  /* write1_nop1 */
1568  p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1569  p_endccw->write1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1570  p_endccw->write1_nop1.count = 1;
1571  p_endccw->write1_nop1.cda = 0;
1572 
1573  /* write1_nop2 */
1574  p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1575  p_endccw->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1576  p_endccw->write1_nop2.count = 1;
1577  p_endccw->write1_nop2.cda = 0;
1578 
1579  /* write2_nop1 */
1580  p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1581  p_endccw->write2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1582  p_endccw->write2_nop1.count = 1;
1583  p_endccw->write2_nop1.cda = 0;
1584 
1585  /* write2_nop2 */
1586  p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1587  p_endccw->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1588  p_endccw->write2_nop2.count = 1;
1589  p_endccw->write2_nop2.cda = 0;
1590 
1591  /* read1_nop1 */
1592  p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1593  p_endccw->read1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1594  p_endccw->read1_nop1.count = 1;
1595  p_endccw->read1_nop1.cda = 0;
1596 
1597  /* read1_nop2 */
1598  p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1599  p_endccw->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1600  p_endccw->read1_nop2.count = 1;
1601  p_endccw->read1_nop2.cda = 0;
1602 
1603  /* read2_nop1 */
1604  p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1605  p_endccw->read2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1606  p_endccw->read2_nop1.count = 1;
1607  p_endccw->read2_nop1.cda = 0;
1608 
1609  /* read2_nop2 */
1610  p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1611  p_endccw->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1612  p_endccw->read2_nop2.count = 1;
1613  p_endccw->read2_nop2.cda = 0;
1614 
1615  /*
1616  * Build a chain of CCWs
1617  *
1618  */
1619  p_buff=privptr->p_buff_ccw;
1620 
1621  p_free_chain=NULL;
1622  for (i=0 ; i < ccw_pages_required; i++ ) {
1623  real_address = (__u32)__pa(p_buff);
1624  p_buf=p_buff;
1625  for (j=0 ; j < ccw_blocks_perpage ; j++) {
1626  p_buf->next = p_free_chain;
1627  p_free_chain = p_buf;
1628  p_buf->real=(__u32)__pa(p_buf);
1629  ++p_buf;
1630  }
1631  p_buff+=PAGE_SIZE;
1632  }
1633  /*
1634  * Initialize ClawSignalBlock
1635  *
1636  */
1637  if (privptr->p_claw_signal_blk==NULL) {
1638  privptr->p_claw_signal_blk=p_free_chain;
1639  p_free_chain=p_free_chain->next;
1640  pClawH=(struct clawh *)privptr->p_claw_signal_blk;
1641  pClawH->length=0xffff;
1642  pClawH->opcode=0xff;
1643  pClawH->flag=CLAW_BUSY;
1644  }
1645 
1646  /*
1647  * allocate write_pages_required and add to free chain
1648  */
1649  if (privptr->p_buff_write==NULL) {
1650  if (privptr->p_env->write_size < PAGE_SIZE) {
1651  privptr->p_buff_write=
1652  (void *)__get_free_pages(__GFP_DMA,
1653  (int)pages_to_order_of_mag(claw_write_pages ));
1654  if (privptr->p_buff_write==NULL) {
1655  privptr->p_buff_ccw=NULL;
1656  return -ENOMEM;
1657  }
1658  /*
1659  * Build CLAW write free chain
1660  *
1661  */
1662 
1663  memset(privptr->p_buff_write, 0x00,
1664  ccw_pages_required * PAGE_SIZE);
1665  privptr->p_write_free_chain=NULL;
1666 
1667  p_buff=privptr->p_buff_write;
1668 
1669  for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
1670  p_buf = p_free_chain; /* get a CCW */
1671  p_free_chain = p_buf->next;
1672  p_buf->next =privptr->p_write_free_chain;
1673  privptr->p_write_free_chain = p_buf;
1674  p_buf-> p_buffer = (struct clawbuf *)p_buff;
1675  p_buf-> write.cda = (__u32)__pa(p_buff);
1676  p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1677  p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1678  p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1679  p_buf-> w_read_FF.count = 1;
1680  p_buf-> w_read_FF.cda =
1681  (__u32)__pa(&p_buf-> header.flag);
1682  p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1683  p_buf-> w_TIC_1.flags = 0;
1684  p_buf-> w_TIC_1.count = 0;
1685 
1686  if (((unsigned long)p_buff +
1687  privptr->p_env->write_size) >=
1688  ((unsigned long)(p_buff+2*
1689  (privptr->p_env->write_size) - 1) & PAGE_MASK)) {
1690  p_buff = p_buff+privptr->p_env->write_size;
1691  }
1692  }
1693  }
1694  else /* Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
1695  {
1696  privptr->p_write_free_chain=NULL;
1697  for (i = 0; i< privptr->p_env->write_buffers ; i++) {
1698  p_buff=(void *)__get_free_pages(__GFP_DMA,
1699  (int)pages_to_order_of_mag(
1700  privptr->p_buff_pages_perwrite) );
1701  if (p_buff==NULL) {
1702  free_pages((unsigned long)privptr->p_buff_ccw,
1703  (int)pages_to_order_of_mag(
1704  privptr->p_buff_ccw_num));
1705  privptr->p_buff_ccw=NULL;
1706  p_buf=privptr->p_buff_write;
1707  while (p_buf!=NULL) {
1708  free_pages((unsigned long)
1709  p_buf->p_buffer,
1710  (int)pages_to_order_of_mag(
1711  privptr->p_buff_pages_perwrite));
1712  p_buf=p_buf->next;
1713  }
1714  return -ENOMEM;
1715  } /* Error on get_pages */
1716  memset(p_buff, 0x00, privptr->p_env->write_size );
1717  p_buf = p_free_chain;
1718  p_free_chain = p_buf->next;
1719  p_buf->next = privptr->p_write_free_chain;
1720  privptr->p_write_free_chain = p_buf;
1721  privptr->p_buff_write = p_buf;
1722  p_buf->p_buffer=(struct clawbuf *)p_buff;
1723  p_buf-> write.cda = (__u32)__pa(p_buff);
1724  p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1725  p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1726  p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1727  p_buf-> w_read_FF.count = 1;
1728  p_buf-> w_read_FF.cda =
1729  (__u32)__pa(&p_buf-> header.flag);
1730  p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1731  p_buf-> w_TIC_1.flags = 0;
1732  p_buf-> w_TIC_1.count = 0;
1733  } /* for all write_buffers */
1734 
1735  } /* else buffers are PAGE_SIZE or bigger */
1736 
1737  }
1738  privptr->p_buff_write_num=claw_write_pages;
1739  privptr->write_free_count=privptr->p_env->write_buffers;
1740 
1741 
1742  /*
1743  * allocate read_pages_required and chain to free chain
1744  */
1745  if (privptr->p_buff_read==NULL) {
1746  if (privptr->p_env->read_size < PAGE_SIZE) {
1747  privptr->p_buff_read=
1748  (void *)__get_free_pages(__GFP_DMA,
1749  (int)pages_to_order_of_mag(claw_read_pages) );
1750  if (privptr->p_buff_read==NULL) {
1751  free_pages((unsigned long)privptr->p_buff_ccw,
1752  (int)pages_to_order_of_mag(
1753  privptr->p_buff_ccw_num));
1754  /* free the write pages size is < page size */
1755  free_pages((unsigned long)privptr->p_buff_write,
1756  (int)pages_to_order_of_mag(
1757  privptr->p_buff_write_num));
1758  privptr->p_buff_ccw=NULL;
1759  privptr->p_buff_write=NULL;
1760  return -ENOMEM;
1761  }
1762  memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
1763  privptr->p_buff_read_num=claw_read_pages;
1764  /*
1765  * Build CLAW read free chain
1766  *
1767  */
1768  p_buff=privptr->p_buff_read;
1769  for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
1770  p_buf = p_free_chain;
1771  p_free_chain = p_buf->next;
1772 
1773  if (p_last_CCWB==NULL) {
1774  p_buf->next=NULL;
1775  real_TIC_address=0;
1776  p_last_CCWB=p_buf;
1777  }
1778  else {
1779  p_buf->next=p_first_CCWB;
1780  real_TIC_address=
1781  (__u32)__pa(&p_first_CCWB -> read );
1782  }
1783 
1784  p_first_CCWB=p_buf;
1785 
1786  p_buf->p_buffer=(struct clawbuf *)p_buff;
1787  /* initialize read command */
1788  p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
1789  p_buf-> read.cda = (__u32)__pa(p_buff);
1790  p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1791  p_buf-> read.count = privptr->p_env->read_size;
1792 
1793  /* initialize read_h command */
1794  p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
1795  p_buf-> read_h.cda =
1796  (__u32)__pa(&(p_buf->header));
1797  p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1798  p_buf-> read_h.count = sizeof(struct clawh);
1799 
1800  /* initialize Signal command */
1801  p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
1802  p_buf-> signal.cda =
1803  (__u32)__pa(&(pClawH->flag));
1804  p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1805  p_buf-> signal.count = 1;
1806 
1807  /* initialize r_TIC_1 command */
1808  p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1809  p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
1810  p_buf-> r_TIC_1.flags = 0;
1811  p_buf-> r_TIC_1.count = 0;
1812 
1813  /* initialize r_read_FF command */
1814  p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1815  p_buf-> r_read_FF.cda =
1816  (__u32)__pa(&(pClawH->flag));
1817  p_buf-> r_read_FF.flags =
1818  CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
1819  p_buf-> r_read_FF.count = 1;
1820 
1821  /* initialize r_TIC_2 */
1822  memcpy(&p_buf->r_TIC_2,
1823  &p_buf->r_TIC_1, sizeof(struct ccw1));
1824 
1825  /* initialize Header */
1826  p_buf->header.length=0xffff;
1827  p_buf->header.opcode=0xff;
1828  p_buf->header.flag=CLAW_PENDING;
1829 
1830  if (((unsigned long)p_buff+privptr->p_env->read_size) >=
1831  ((unsigned long)(p_buff+2*(privptr->p_env->read_size)
1832  -1)
1833  & PAGE_MASK)) {
1834  p_buff= p_buff+privptr->p_env->read_size;
1835  }
1836  else {
1837  p_buff=
1838  (void *)((unsigned long)
1839  (p_buff+2*(privptr->p_env->read_size)-1)
1840  & PAGE_MASK) ;
1841  }
1842  } /* for read_buffers */
1843  } /* read_size < PAGE_SIZE */
1844  else { /* read Size >= PAGE_SIZE */
1845  for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
1846  p_buff = (void *)__get_free_pages(__GFP_DMA,
1847  (int)pages_to_order_of_mag(
1848  privptr->p_buff_pages_perread));
1849  if (p_buff==NULL) {
1850  free_pages((unsigned long)privptr->p_buff_ccw,
1851  (int)pages_to_order_of_mag(privptr->
1852  p_buff_ccw_num));
1853  /* free the write pages */
1854  p_buf=privptr->p_buff_write;
1855  while (p_buf!=NULL) {
1856  free_pages(
1857  (unsigned long)p_buf->p_buffer,
1858  (int)pages_to_order_of_mag(
1859  privptr->p_buff_pages_perwrite));
1860  p_buf=p_buf->next;
1861  }
1862  /* free any read pages already alloc */
1863  p_buf=privptr->p_buff_read;
1864  while (p_buf!=NULL) {
1865  free_pages(
1866  (unsigned long)p_buf->p_buffer,
1867  (int)pages_to_order_of_mag(
1868  privptr->p_buff_pages_perread));
1869  p_buf=p_buf->next;
1870  }
1871  privptr->p_buff_ccw=NULL;
1872  privptr->p_buff_write=NULL;
1873  return -ENOMEM;
1874  }
1875  memset(p_buff, 0x00, privptr->p_env->read_size);
1876  p_buf = p_free_chain;
1877  privptr->p_buff_read = p_buf;
1878  p_free_chain = p_buf->next;
1879 
1880  if (p_last_CCWB==NULL) {
1881  p_buf->next=NULL;
1882  real_TIC_address=0;
1883  p_last_CCWB=p_buf;
1884  }
1885  else {
1886  p_buf->next=p_first_CCWB;
1887  real_TIC_address=
1888  (addr_t)__pa(
1889  &p_first_CCWB -> read );
1890  }
1891 
1892  p_first_CCWB=p_buf;
1893  /* save buff address */
1894  p_buf->p_buffer=(struct clawbuf *)p_buff;
1895  /* initialize read command */
1896  p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
1897  p_buf-> read.cda = (__u32)__pa(p_buff);
1898  p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1899  p_buf-> read.count = privptr->p_env->read_size;
1900 
1901  /* initialize read_h command */
1902  p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
1903  p_buf-> read_h.cda =
1904  (__u32)__pa(&(p_buf->header));
1905  p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1906  p_buf-> read_h.count = sizeof(struct clawh);
1907 
1908  /* initialize Signal command */
1909  p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
1910  p_buf-> signal.cda =
1911  (__u32)__pa(&(pClawH->flag));
1912  p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1913  p_buf-> signal.count = 1;
1914 
1915  /* initialize r_TIC_1 command */
1916  p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1917  p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
1918  p_buf-> r_TIC_1.flags = 0;
1919  p_buf-> r_TIC_1.count = 0;
1920 
1921  /* initialize r_read_FF command */
1922  p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1923  p_buf-> r_read_FF.cda =
1924  (__u32)__pa(&(pClawH->flag));
1925  p_buf-> r_read_FF.flags =
1926  CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
1927  p_buf-> r_read_FF.count = 1;
1928 
1929  /* initialize r_TIC_2 */
1930  memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
1931  sizeof(struct ccw1));
1932 
1933  /* initialize Header */
1934  p_buf->header.length=0xffff;
1935  p_buf->header.opcode=0xff;
1936  p_buf->header.flag=CLAW_PENDING;
1937 
1938  } /* For read_buffers */
1939  } /* read_size >= PAGE_SIZE */
1940  } /* pBuffread = NULL */
1941  add_claw_reads( dev ,p_first_CCWB , p_last_CCWB);
1942  privptr->buffs_alloc = 1;
1943 
1944  return 0;
1945 } /* end of init_ccw_bk */
1946 
1947 /*-------------------------------------------------------------------*
1948 * *
1949 * probe_error *
1950 * *
1951 *--------------------------------------------------------------------*/
1952 
1953 static void
1954 probe_error( struct ccwgroup_device *cgdev)
1955 {
1956  struct claw_privbk *privptr;
1957 
1958  CLAW_DBF_TEXT(4, trace, "proberr");
1959  privptr = dev_get_drvdata(&cgdev->dev);
1960  if (privptr != NULL) {
1961  dev_set_drvdata(&cgdev->dev, NULL);
1962  kfree(privptr->p_env);
1963  kfree(privptr->p_mtc_envelope);
1964  kfree(privptr);
1965  }
1966 } /* probe_error */
1967 
1968 /*-------------------------------------------------------------------*
1969 * claw_process_control *
1970 * *
1971 * *
1972 *--------------------------------------------------------------------*/
1973 
1974 static int
1975 claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
1976 {
1977 
1978  struct clawbuf *p_buf;
1979  struct clawctl ctlbk;
1980  struct clawctl *p_ctlbk;
1981  char temp_host_name[8];
1982  char temp_ws_name[8];
1983  struct claw_privbk *privptr;
1984  struct claw_env *p_env;
1985  struct sysval *p_sysval;
1986  struct conncmd *p_connect=NULL;
1987  int rc;
1988  struct chbk *p_ch = NULL;
1989  struct device *tdev;
1990  CLAW_DBF_TEXT(2, setup, "clw_cntl");
1991  udelay(1000); /* Wait a ms for the control packets to
1992  *catch up to each other */
1993  privptr = dev->ml_priv;
1994  p_env=privptr->p_env;
1995  tdev = &privptr->channel[READ_CHANNEL].cdev->dev;
1996  memcpy( &temp_host_name, p_env->host_name, 8);
1997  memcpy( &temp_ws_name, p_env->adapter_name , 8);
1998  dev_info(tdev, "%s: CLAW device %.8s: "
1999  "Received Control Packet\n",
2000  dev->name, temp_ws_name);
2001  if (privptr->release_pend==1) {
2002  return 0;
2003  }
2004  p_buf=p_ccw->p_buffer;
2005  p_ctlbk=&ctlbk;
2006  if (p_env->packing == DO_PACKED) { /* packing in progress?*/
2007  memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
2008  } else {
2009  memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
2010  }
2011  switch (p_ctlbk->command)
2012  {
2013  case SYSTEM_VALIDATE_REQUEST:
2014  if (p_ctlbk->version != CLAW_VERSION_ID) {
2015  claw_snd_sys_validate_rsp(dev, p_ctlbk,
2016  CLAW_RC_WRONG_VERSION);
2017  dev_warn(tdev, "The communication peer of %s"
2018  " uses an incorrect API version %d\n",
2019  dev->name, p_ctlbk->version);
2020  }
2021  p_sysval = (struct sysval *)&(p_ctlbk->data);
2022  dev_info(tdev, "%s: Recv Sys Validate Request: "
2023  "Vers=%d,link_id=%d,Corr=%d,WS name=%.8s,"
2024  "Host name=%.8s\n",
2025  dev->name, p_ctlbk->version,
2026  p_ctlbk->linkid,
2027  p_ctlbk->correlator,
2028  p_sysval->WS_name,
2029  p_sysval->host_name);
2030  if (memcmp(temp_host_name, p_sysval->host_name, 8)) {
2031  claw_snd_sys_validate_rsp(dev, p_ctlbk,
2032  CLAW_RC_NAME_MISMATCH);
2033  CLAW_DBF_TEXT(2, setup, "HSTBAD");
2034  CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->host_name);
2035  CLAW_DBF_TEXT_(2, setup, "%s", temp_host_name);
2036  dev_warn(tdev,
2037  "Host name %s for %s does not match the"
2038  " remote adapter name %s\n",
2039  p_sysval->host_name,
2040  dev->name,
2041  temp_host_name);
2042  }
2043  if (memcmp(temp_ws_name, p_sysval->WS_name, 8)) {
2044  claw_snd_sys_validate_rsp(dev, p_ctlbk,
2045  CLAW_RC_NAME_MISMATCH);
2046  CLAW_DBF_TEXT(2, setup, "WSNBAD");
2047  CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->WS_name);
2048  CLAW_DBF_TEXT_(2, setup, "%s", temp_ws_name);
2049  dev_warn(tdev, "Adapter name %s for %s does not match"
2050  " the remote host name %s\n",
2051  p_sysval->WS_name,
2052  dev->name,
2053  temp_ws_name);
2054  }
2055  if ((p_sysval->write_frame_size < p_env->write_size) &&
2056  (p_env->packing == 0)) {
2057  claw_snd_sys_validate_rsp(dev, p_ctlbk,
2058  CLAW_RC_HOST_RCV_TOO_SMALL);
2059  dev_warn(tdev,
2060  "The local write buffer is smaller than the"
2061  " remote read buffer\n");
2062  CLAW_DBF_TEXT(2, setup, "wrtszbad");
2063  }
2064  if ((p_sysval->read_frame_size < p_env->read_size) &&
2065  (p_env->packing == 0)) {
2066  claw_snd_sys_validate_rsp(dev, p_ctlbk,
2067  CLAW_RC_HOST_RCV_TOO_SMALL);
2068  dev_warn(tdev,
2069  "The local read buffer is smaller than the"
2070  " remote write buffer\n");
2071  CLAW_DBF_TEXT(2, setup, "rdsizbad");
2072  }
2073  claw_snd_sys_validate_rsp(dev, p_ctlbk, 0);
2074  dev_info(tdev,
2075  "CLAW device %.8s: System validate"
2076  " completed.\n", temp_ws_name);
2077  dev_info(tdev,
2078  "%s: sys Validate Rsize:%d Wsize:%d\n",
2079  dev->name, p_sysval->read_frame_size,
2080  p_sysval->write_frame_size);
2081  privptr->system_validate_comp = 1;
2082  if (strncmp(p_env->api_type, WS_APPL_NAME_PACKED, 6) == 0)
2083  p_env->packing = PACKING_ASK;
2084  claw_strt_conn_req(dev);
2085  break;
2086  case SYSTEM_VALIDATE_RESPONSE:
2087  p_sysval = (struct sysval *)&(p_ctlbk->data);
2088  dev_info(tdev,
2089  "Settings for %s validated (version=%d, "
2090  "remote device=%d, rc=%d, adapter name=%.8s, "
2091  "host name=%.8s)\n",
2092  dev->name,
2093  p_ctlbk->version,
2094  p_ctlbk->correlator,
2095  p_ctlbk->rc,
2096  p_sysval->WS_name,
2097  p_sysval->host_name);
2098  switch (p_ctlbk->rc) {
2099  case 0:
2100  dev_info(tdev, "%s: CLAW device "
2101  "%.8s: System validate completed.\n",
2102  dev->name, temp_ws_name);
2103  if (privptr->system_validate_comp == 0)
2104  claw_strt_conn_req(dev);
2105  privptr->system_validate_comp = 1;
2106  break;
2107  case CLAW_RC_NAME_MISMATCH:
2108  dev_warn(tdev, "Validating %s failed because of"
2109  " a host or adapter name mismatch\n",
2110  dev->name);
2111  break;
2112  case CLAW_RC_WRONG_VERSION:
2113  dev_warn(tdev, "Validating %s failed because of a"
2114  " version conflict\n",
2115  dev->name);
2116  break;
2117  case CLAW_RC_HOST_RCV_TOO_SMALL:
2118  dev_warn(tdev, "Validating %s failed because of a"
2119  " frame size conflict\n",
2120  dev->name);
2121  break;
2122  default:
2123  dev_warn(tdev, "The communication peer of %s rejected"
2124  " the connection\n",
2125  dev->name);
2126  break;
2127  }
2128  break;
2129 
2130  case CONNECTION_REQUEST:
2131  p_connect = (struct conncmd *)&(p_ctlbk->data);
2132  dev_info(tdev, "%s: Recv Conn Req: Vers=%d,link_id=%d,"
2133  "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
2134  dev->name,
2135  p_ctlbk->version,
2136  p_ctlbk->linkid,
2137  p_ctlbk->correlator,
2138  p_connect->host_name,
2139  p_connect->WS_name);
2140  if (privptr->active_link_ID != 0) {
2141  claw_snd_disc(dev, p_ctlbk);
2142  dev_info(tdev, "%s rejected a connection request"
2143  " because it is already active\n",
2144  dev->name);
2145  }
2146  if (p_ctlbk->linkid != 1) {
2147  claw_snd_disc(dev, p_ctlbk);
2148  dev_info(tdev, "%s rejected a request to open multiple"
2149  " connections\n",
2150  dev->name);
2151  }
2152  rc = find_link(dev, p_connect->host_name, p_connect->WS_name);
2153  if (rc != 0) {
2154  claw_snd_disc(dev, p_ctlbk);
2155  dev_info(tdev, "%s rejected a connection request"
2156  " because of a type mismatch\n",
2157  dev->name);
2158  }
2159  claw_send_control(dev,
2160  CONNECTION_CONFIRM, p_ctlbk->linkid,
2161  p_ctlbk->correlator,
2162  0, p_connect->host_name,
2163  p_connect->WS_name);
2164  if (p_env->packing == PACKING_ASK) {
2165  p_env->packing = PACK_SEND;
2166  claw_snd_conn_req(dev, 0);
2167  }
2168  dev_info(tdev, "%s: CLAW device %.8s: Connection "
2169  "completed link_id=%d.\n",
2170  dev->name, temp_ws_name,
2171  p_ctlbk->linkid);
2172  privptr->active_link_ID = p_ctlbk->linkid;
2173  p_ch = &privptr->channel[WRITE_CHANNEL];
2174  wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */
2175  break;
2176  case CONNECTION_RESPONSE:
2177  p_connect = (struct conncmd *)&(p_ctlbk->data);
2178  dev_info(tdev, "%s: Recv Conn Resp: Vers=%d,link_id=%d,"
2179  "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
2180  dev->name,
2181  p_ctlbk->version,
2182  p_ctlbk->linkid,
2183  p_ctlbk->correlator,
2184  p_ctlbk->rc,
2185  p_connect->host_name,
2186  p_connect->WS_name);
2187 
2188  if (p_ctlbk->rc != 0) {
2189  dev_warn(tdev, "The communication peer of %s rejected"
2190  " a connection request\n",
2191  dev->name);
2192  return 1;
2193  }
2194  rc = find_link(dev,
2195  p_connect->host_name, p_connect->WS_name);
2196  if (rc != 0) {
2197  claw_snd_disc(dev, p_ctlbk);
2198  dev_warn(tdev, "The communication peer of %s"
2199  " rejected a connection "
2200  "request because of a type mismatch\n",
2201  dev->name);
2202  }
2203  /* should be until CONNECTION_CONFIRM */
2204  privptr->active_link_ID = -(p_ctlbk->linkid);
2205  break;
2206  case CONNECTION_CONFIRM:
2207  p_connect = (struct conncmd *)&(p_ctlbk->data);
2208  dev_info(tdev,
2209  "%s: Recv Conn Confirm: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 (p_ctlbk->linkid == -(privptr->active_link_ID)) {
2218  privptr->active_link_ID = p_ctlbk->linkid;
2219  if (p_env->packing > PACKING_ASK) {
2220  dev_info(tdev,
2221  "%s: Confirmed Now packing\n", dev->name);
2222  p_env->packing = DO_PACKED;
2223  }
2224  p_ch = &privptr->channel[WRITE_CHANNEL];
2225  wake_up(&p_ch->wait);
2226  } else {
2227  dev_warn(tdev, "Activating %s failed because of"
2228  " an incorrect link ID=%d\n",
2229  dev->name, p_ctlbk->linkid);
2230  claw_snd_disc(dev, p_ctlbk);
2231  }
2232  break;
2233  case DISCONNECT:
2234  dev_info(tdev, "%s: Disconnect: "
2235  "Vers=%d,link_id=%d,Corr=%d\n",
2236  dev->name, p_ctlbk->version,
2237  p_ctlbk->linkid, p_ctlbk->correlator);
2238  if ((p_ctlbk->linkid == 2) &&
2239  (p_env->packing == PACK_SEND)) {
2240  privptr->active_link_ID = 1;
2241  p_env->packing = DO_PACKED;
2242  } else
2243  privptr->active_link_ID = 0;
2244  break;
2245  case CLAW_ERROR:
2246  dev_warn(tdev, "The communication peer of %s failed\n",
2247  dev->name);
2248  break;
2249  default:
2250  dev_warn(tdev, "The communication peer of %s sent"
2251  " an unknown command code\n",
2252  dev->name);
2253  break;
2254  }
2255 
2256  return 0;
2257 } /* end of claw_process_control */
2258 
2259 
2260 /*-------------------------------------------------------------------*
2261 * claw_send_control *
2262 * *
2263 *--------------------------------------------------------------------*/
2264 
2265 static int
2266 claw_send_control(struct net_device *dev, __u8 type, __u8 link,
2267  __u8 correlator, __u8 rc, char *local_name, char *remote_name)
2268 {
2269  struct claw_privbk *privptr;
2270  struct clawctl *p_ctl;
2271  struct sysval *p_sysval;
2272  struct conncmd *p_connect;
2273  struct sk_buff *skb;
2274 
2275  CLAW_DBF_TEXT(2, setup, "sndcntl");
2276  privptr = dev->ml_priv;
2277  p_ctl=(struct clawctl *)&privptr->ctl_bk;
2278 
2279  p_ctl->command=type;
2280  p_ctl->version=CLAW_VERSION_ID;
2281  p_ctl->linkid=link;
2282  p_ctl->correlator=correlator;
2283  p_ctl->rc=rc;
2284 
2285  p_sysval=(struct sysval *)&p_ctl->data;
2286  p_connect=(struct conncmd *)&p_ctl->data;
2287 
2288  switch (p_ctl->command) {
2289  case SYSTEM_VALIDATE_REQUEST:
2290  case SYSTEM_VALIDATE_RESPONSE:
2291  memcpy(&p_sysval->host_name, local_name, 8);
2292  memcpy(&p_sysval->WS_name, remote_name, 8);
2293  if (privptr->p_env->packing > 0) {
2294  p_sysval->read_frame_size = DEF_PACK_BUFSIZE;
2295  p_sysval->write_frame_size = DEF_PACK_BUFSIZE;
2296  } else {
2297  /* how big is the biggest group of packets */
2298  p_sysval->read_frame_size =
2299  privptr->p_env->read_size;
2300  p_sysval->write_frame_size =
2301  privptr->p_env->write_size;
2302  }
2303  memset(&p_sysval->reserved, 0x00, 4);
2304  break;
2305  case CONNECTION_REQUEST:
2306  case CONNECTION_RESPONSE:
2307  case CONNECTION_CONFIRM:
2308  case DISCONNECT:
2309  memcpy(&p_sysval->host_name, local_name, 8);
2310  memcpy(&p_sysval->WS_name, remote_name, 8);
2311  if (privptr->p_env->packing > 0) {
2312  /* How big is the biggest packet */
2313  p_connect->reserved1[0]=CLAW_FRAME_SIZE;
2314  p_connect->reserved1[1]=CLAW_FRAME_SIZE;
2315  } else {
2316  memset(&p_connect->reserved1, 0x00, 4);
2317  memset(&p_connect->reserved2, 0x00, 4);
2318  }
2319  break;
2320  default:
2321  break;
2322  }
2323 
2324  /* write Control Record to the device */
2325 
2326 
2327  skb = dev_alloc_skb(sizeof(struct clawctl));
2328  if (!skb) {
2329  return -ENOMEM;
2330  }
2331  memcpy(skb_put(skb, sizeof(struct clawctl)),
2332  p_ctl, sizeof(struct clawctl));
2333  if (privptr->p_env->packing >= PACK_SEND)
2334  claw_hw_tx(skb, dev, 1);
2335  else
2336  claw_hw_tx(skb, dev, 0);
2337  return 0;
2338 } /* end of claw_send_control */
2339 
2340 /*-------------------------------------------------------------------*
2341 * claw_snd_conn_req *
2342 * *
2343 *--------------------------------------------------------------------*/
2344 static int
2345 claw_snd_conn_req(struct net_device *dev, __u8 link)
2346 {
2347  int rc;
2348  struct claw_privbk *privptr = dev->ml_priv;
2349  struct clawctl *p_ctl;
2350 
2351  CLAW_DBF_TEXT(2, setup, "snd_conn");
2352  rc = 1;
2353  p_ctl=(struct clawctl *)&privptr->ctl_bk;
2354  p_ctl->linkid = link;
2355  if ( privptr->system_validate_comp==0x00 ) {
2356  return rc;
2357  }
2358  if (privptr->p_env->packing == PACKING_ASK )
2359  rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2360  WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
2361  if (privptr->p_env->packing == PACK_SEND) {
2362  rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2363  WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
2364  }
2365  if (privptr->p_env->packing == 0)
2366  rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2367  HOST_APPL_NAME, privptr->p_env->api_type);
2368  return rc;
2369 
2370 } /* end of claw_snd_conn_req */
2371 
2372 
2373 /*-------------------------------------------------------------------*
2374 * claw_snd_disc *
2375 * *
2376 *--------------------------------------------------------------------*/
2377 
2378 static int
2379 claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
2380 {
2381  int rc;
2382  struct conncmd * p_connect;
2383 
2384  CLAW_DBF_TEXT(2, setup, "snd_dsc");
2385  p_connect=(struct conncmd *)&p_ctl->data;
2386 
2387  rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
2388  p_ctl->correlator, 0,
2389  p_connect->host_name, p_connect->WS_name);
2390  return rc;
2391 } /* end of claw_snd_disc */
2392 
2393 
2394 /*-------------------------------------------------------------------*
2395 * claw_snd_sys_validate_rsp *
2396 * *
2397 *--------------------------------------------------------------------*/
2398 
2399 static int
2400 claw_snd_sys_validate_rsp(struct net_device *dev,
2401  struct clawctl *p_ctl, __u32 return_code)
2402 {
2403  struct claw_env * p_env;
2404  struct claw_privbk *privptr;
2405  int rc;
2406 
2407  CLAW_DBF_TEXT(2, setup, "chkresp");
2408  privptr = dev->ml_priv;
2409  p_env=privptr->p_env;
2410  rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
2411  p_ctl->linkid,
2412  p_ctl->correlator,
2413  return_code,
2414  p_env->host_name,
2415  p_env->adapter_name );
2416  return rc;
2417 } /* end of claw_snd_sys_validate_rsp */
2418 
2419 /*-------------------------------------------------------------------*
2420 * claw_strt_conn_req *
2421 * *
2422 *--------------------------------------------------------------------*/
2423 
2424 static int
2425 claw_strt_conn_req(struct net_device *dev )
2426 {
2427  int rc;
2428 
2429  CLAW_DBF_TEXT(2, setup, "conn_req");
2430  rc=claw_snd_conn_req(dev, 1);
2431  return rc;
2432 } /* end of claw_strt_conn_req */
2433 
2434 
2435 
2436 /*-------------------------------------------------------------------*
2437  * claw_stats *
2438  *-------------------------------------------------------------------*/
2439 
2440 static struct
2441 net_device_stats *claw_stats(struct net_device *dev)
2442 {
2443  struct claw_privbk *privptr;
2444 
2445  CLAW_DBF_TEXT(4, trace, "stats");
2446  privptr = dev->ml_priv;
2447  return &privptr->stats;
2448 } /* end of claw_stats */
2449 
2450 
2451 /*-------------------------------------------------------------------*
2452 * unpack_read *
2453 * *
2454 *--------------------------------------------------------------------*/
2455 static void
2456 unpack_read(struct net_device *dev )
2457 {
2458  struct sk_buff *skb;
2459  struct claw_privbk *privptr;
2460  struct claw_env *p_env;
2461  struct ccwbk *p_this_ccw;
2462  struct ccwbk *p_first_ccw;
2463  struct ccwbk *p_last_ccw;
2464  struct clawph *p_packh;
2465  void *p_packd;
2466  struct clawctl *p_ctlrec=NULL;
2467  struct device *p_dev;
2468 
2469  __u32 len_of_data;
2470  __u32 pack_off;
2471  __u8 link_num;
2472  __u8 mtc_this_frm=0;
2473  __u32 bytes_to_mov;
2474  int i=0;
2475  int p=0;
2476 
2477  CLAW_DBF_TEXT(4, trace, "unpkread");
2478  p_first_ccw=NULL;
2479  p_last_ccw=NULL;
2480  p_packh=NULL;
2481  p_packd=NULL;
2482  privptr = dev->ml_priv;
2483 
2484  p_dev = &privptr->channel[READ_CHANNEL].cdev->dev;
2485  p_env = privptr->p_env;
2486  p_this_ccw=privptr->p_read_active_first;
2487  while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
2488  pack_off = 0;
2489  p = 0;
2490  p_this_ccw->header.flag=CLAW_PENDING;
2491  privptr->p_read_active_first=p_this_ccw->next;
2492  p_this_ccw->next=NULL;
2493  p_packh = (struct clawph *)p_this_ccw->p_buffer;
2494  if ((p_env->packing == PACK_SEND) &&
2495  (p_packh->len == 32) &&
2496  (p_packh->link_num == 0)) { /* is it a packed ctl rec? */
2497  p_packh++; /* peek past pack header */
2498  p_ctlrec = (struct clawctl *)p_packh;
2499  p_packh--; /* un peek */
2500  if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
2501  (p_ctlrec->command == CONNECTION_CONFIRM))
2502  p_env->packing = DO_PACKED;
2503  }
2504  if (p_env->packing == DO_PACKED)
2505  link_num=p_packh->link_num;
2506  else
2507  link_num=p_this_ccw->header.opcode / 8;
2508  if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
2509  mtc_this_frm=1;
2510  if (p_this_ccw->header.length!=
2511  privptr->p_env->read_size ) {
2512  dev_warn(p_dev,
2513  "The communication peer of %s"
2514  " sent a faulty"
2515  " frame of length %02x\n",
2516  dev->name, p_this_ccw->header.length);
2517  }
2518  }
2519 
2520  if (privptr->mtc_skipping) {
2521  /*
2522  * We're in the mode of skipping past a
2523  * multi-frame message
2524  * that we can't process for some reason or other.
2525  * The first frame without the More-To-Come flag is
2526  * the last frame of the skipped message.
2527  */
2528  /* in case of More-To-Come not set in this frame */
2529  if (mtc_this_frm==0) {
2530  privptr->mtc_skipping=0; /* Ok, the end */
2531  privptr->mtc_logical_link=-1;
2532  }
2533  goto NextFrame;
2534  }
2535 
2536  if (link_num==0) {
2537  claw_process_control(dev, p_this_ccw);
2538  CLAW_DBF_TEXT(4, trace, "UnpkCntl");
2539  goto NextFrame;
2540  }
2541 unpack_next:
2542  if (p_env->packing == DO_PACKED) {
2543  if (pack_off > p_env->read_size)
2544  goto NextFrame;
2545  p_packd = p_this_ccw->p_buffer+pack_off;
2546  p_packh = (struct clawph *) p_packd;
2547  if ((p_packh->len == 0) || /* done with this frame? */
2548  (p_packh->flag != 0))
2549  goto NextFrame;
2550  bytes_to_mov = p_packh->len;
2551  pack_off += bytes_to_mov+sizeof(struct clawph);
2552  p++;
2553  } else {
2554  bytes_to_mov=p_this_ccw->header.length;
2555  }
2556  if (privptr->mtc_logical_link<0) {
2557 
2558  /*
2559  * if More-To-Come is set in this frame then we don't know
2560  * length of entire message, and hence have to allocate
2561  * large buffer */
2562 
2563  /* We are starting a new envelope */
2564  privptr->mtc_offset=0;
2565  privptr->mtc_logical_link=link_num;
2566  }
2567 
2568  if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
2569  /* error */
2570  privptr->stats.rx_frame_errors++;
2571  goto NextFrame;
2572  }
2573  if (p_env->packing == DO_PACKED) {
2574  memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
2575  p_packd+sizeof(struct clawph), bytes_to_mov);
2576 
2577  } else {
2578  memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
2579  p_this_ccw->p_buffer, bytes_to_mov);
2580  }
2581  if (mtc_this_frm==0) {
2582  len_of_data=privptr->mtc_offset+bytes_to_mov;
2583  skb=dev_alloc_skb(len_of_data);
2584  if (skb) {
2585  memcpy(skb_put(skb,len_of_data),
2586  privptr->p_mtc_envelope,
2587  len_of_data);
2588  skb->dev=dev;
2589  skb_reset_mac_header(skb);
2590  skb->protocol=htons(ETH_P_IP);
2591  skb->ip_summed=CHECKSUM_UNNECESSARY;
2592  privptr->stats.rx_packets++;
2593  privptr->stats.rx_bytes+=len_of_data;
2594  netif_rx(skb);
2595  }
2596  else {
2597  dev_info(p_dev, "Allocating a buffer for"
2598  " incoming data failed\n");
2599  privptr->stats.rx_dropped++;
2600  }
2601  privptr->mtc_offset=0;
2602  privptr->mtc_logical_link=-1;
2603  }
2604  else {
2605  privptr->mtc_offset+=bytes_to_mov;
2606  }
2607  if (p_env->packing == DO_PACKED)
2608  goto unpack_next;
2609 NextFrame:
2610  /*
2611  * Remove ThisCCWblock from active read queue, and add it
2612  * to queue of free blocks to be reused.
2613  */
2614  i++;
2615  p_this_ccw->header.length=0xffff;
2616  p_this_ccw->header.opcode=0xff;
2617  /*
2618  * add this one to the free queue for later reuse
2619  */
2620  if (p_first_ccw==NULL) {
2621  p_first_ccw = p_this_ccw;
2622  }
2623  else {
2624  p_last_ccw->next = p_this_ccw;
2625  }
2626  p_last_ccw = p_this_ccw;
2627  /*
2628  * chain to next block on active read queue
2629  */
2630  p_this_ccw = privptr->p_read_active_first;
2631  CLAW_DBF_TEXT_(4, trace, "rxpkt %d", p);
2632  } /* end of while */
2633 
2634  /* check validity */
2635 
2636  CLAW_DBF_TEXT_(4, trace, "rxfrm %d", i);
2637  add_claw_reads(dev, p_first_ccw, p_last_ccw);
2638  claw_strt_read(dev, LOCK_YES);
2639  return;
2640 } /* end of unpack_read */
2641 
2642 /*-------------------------------------------------------------------*
2643 * claw_strt_read *
2644 * *
2645 *--------------------------------------------------------------------*/
2646 static void
2647 claw_strt_read (struct net_device *dev, int lock )
2648 {
2649  int rc = 0;
2650  __u32 parm;
2651  unsigned long saveflags = 0;
2652  struct claw_privbk *privptr = dev->ml_priv;
2653  struct ccwbk*p_ccwbk;
2654  struct chbk *p_ch;
2655  struct clawh *p_clawh;
2656  p_ch = &privptr->channel[READ_CHANNEL];
2657 
2658  CLAW_DBF_TEXT(4, trace, "StRdNter");
2659  p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
2660  p_clawh->flag=CLAW_IDLE; /* 0x00 */
2661 
2662  if ((privptr->p_write_active_first!=NULL &&
2663  privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
2664  (privptr->p_read_active_first!=NULL &&
2665  privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
2666  p_clawh->flag=CLAW_BUSY; /* 0xff */
2667  }
2668  if (lock==LOCK_YES) {
2669  spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
2670  }
2671  if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
2672  CLAW_DBF_TEXT(4, trace, "HotRead");
2673  p_ccwbk=privptr->p_read_active_first;
2674  parm = (unsigned long) p_ch;
2675  rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
2676  0xff, 0);
2677  if (rc != 0) {
2678  ccw_check_return_code(p_ch->cdev, rc);
2679  }
2680  }
2681  else {
2682  CLAW_DBF_TEXT(2, trace, "ReadAct");
2683  }
2684 
2685  if (lock==LOCK_YES) {
2686  spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
2687  }
2688  CLAW_DBF_TEXT(4, trace, "StRdExit");
2689  return;
2690 } /* end of claw_strt_read */
2691 
2692 /*-------------------------------------------------------------------*
2693 * claw_strt_out_IO *
2694 * *
2695 *--------------------------------------------------------------------*/
2696 
2697 static void
2698 claw_strt_out_IO( struct net_device *dev )
2699 {
2700  int rc = 0;
2701  unsigned long parm;
2702  struct claw_privbk *privptr;
2703  struct chbk *p_ch;
2704  struct ccwbk *p_first_ccw;
2705 
2706  if (!dev) {
2707  return;
2708  }
2709  privptr = (struct claw_privbk *)dev->ml_priv;
2710  p_ch = &privptr->channel[WRITE_CHANNEL];
2711 
2712  CLAW_DBF_TEXT(4, trace, "strt_io");
2713  p_first_ccw=privptr->p_write_active_first;
2714 
2715  if (p_ch->claw_state == CLAW_STOP)
2716  return;
2717  if (p_first_ccw == NULL) {
2718  return;
2719  }
2720  if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
2721  parm = (unsigned long) p_ch;
2722  CLAW_DBF_TEXT(2, trace, "StWrtIO");
2723  rc = ccw_device_start(p_ch->cdev, &p_first_ccw->write, parm,
2724  0xff, 0);
2725  if (rc != 0) {
2726  ccw_check_return_code(p_ch->cdev, rc);
2727  }
2728  }
2729  dev->trans_start = jiffies;
2730  return;
2731 } /* end of claw_strt_out_IO */
2732 
2733 /*-------------------------------------------------------------------*
2734 * Free write buffers *
2735 * *
2736 *--------------------------------------------------------------------*/
2737 
2738 static void
2739 claw_free_wrt_buf( struct net_device *dev )
2740 {
2741 
2742  struct claw_privbk *privptr = (struct claw_privbk *)dev->ml_priv;
2743  struct ccwbk*p_this_ccw;
2744  struct ccwbk*p_next_ccw;
2745 
2746  CLAW_DBF_TEXT(4, trace, "freewrtb");
2747  /* scan the write queue to free any completed write packets */
2748  p_this_ccw=privptr->p_write_active_first;
2749  while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
2750  {
2751  p_next_ccw = p_this_ccw->next;
2752  if (((p_next_ccw!=NULL) &&
2753  (p_next_ccw->header.flag!=CLAW_PENDING)) ||
2754  ((p_this_ccw == privptr->p_write_active_last) &&
2755  (p_this_ccw->header.flag!=CLAW_PENDING))) {
2756  /* The next CCW is OK or this is */
2757  /* the last CCW...free it @A1A */
2758  privptr->p_write_active_first=p_this_ccw->next;
2759  p_this_ccw->header.flag=CLAW_PENDING;
2760  p_this_ccw->next=privptr->p_write_free_chain;
2761  privptr->p_write_free_chain=p_this_ccw;
2762  ++privptr->write_free_count;
2763  privptr->stats.tx_bytes+= p_this_ccw->write.count;
2764  p_this_ccw=privptr->p_write_active_first;
2765  privptr->stats.tx_packets++;
2766  }
2767  else {
2768  break;
2769  }
2770  }
2771  if (privptr->write_free_count!=0) {
2772  claw_clearbit_busy(TB_NOBUFFER,dev);
2773  }
2774  /* whole chain removed? */
2775  if (privptr->p_write_active_first==NULL) {
2776  privptr->p_write_active_last=NULL;
2777  }
2778  CLAW_DBF_TEXT_(4, trace, "FWC=%d", privptr->write_free_count);
2779  return;
2780 }
2781 
2782 /*-------------------------------------------------------------------*
2783 * claw free netdevice *
2784 * *
2785 *--------------------------------------------------------------------*/
2786 static void
2787 claw_free_netdevice(struct net_device * dev, int free_dev)
2788 {
2789  struct claw_privbk *privptr;
2790 
2791  CLAW_DBF_TEXT(2, setup, "free_dev");
2792  if (!dev)
2793  return;
2794  CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
2795  privptr = dev->ml_priv;
2796  if (dev->flags & IFF_RUNNING)
2797  claw_release(dev);
2798  if (privptr) {
2799  privptr->channel[READ_CHANNEL].ndev = NULL; /* say it's free */
2800  }
2801  dev->ml_priv = NULL;
2802 #ifdef MODULE
2803  if (free_dev) {
2804  free_netdev(dev);
2805  }
2806 #endif
2807  CLAW_DBF_TEXT(2, setup, "free_ok");
2808 }
2809 
2815 static const struct net_device_ops claw_netdev_ops = {
2816  .ndo_open = claw_open,
2817  .ndo_stop = claw_release,
2818  .ndo_get_stats = claw_stats,
2819  .ndo_start_xmit = claw_tx,
2820  .ndo_change_mtu = claw_change_mtu,
2821 };
2822 
2823 static void
2824 claw_init_netdevice(struct net_device * dev)
2825 {
2826  CLAW_DBF_TEXT(2, setup, "init_dev");
2827  CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
2828  dev->mtu = CLAW_DEFAULT_MTU_SIZE;
2829  dev->hard_header_len = 0;
2830  dev->addr_len = 0;
2831  dev->type = ARPHRD_SLIP;
2832  dev->tx_queue_len = 1300;
2833  dev->flags = IFF_POINTOPOINT | IFF_NOARP;
2834  dev->netdev_ops = &claw_netdev_ops;
2835  CLAW_DBF_TEXT(2, setup, "initok");
2836  return;
2837 }
2838 
2846 static int
2847 add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
2848 {
2849  struct chbk *p_ch;
2850  struct ccw_dev_id dev_id;
2851 
2852  CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cdev->dev));
2853  privptr->channel[i].flag = i+1; /* Read is 1 Write is 2 */
2854  p_ch = &privptr->channel[i];
2855  p_ch->cdev = cdev;
2856  snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", dev_name(&cdev->dev));
2857  ccw_device_get_id(cdev, &dev_id);
2858  p_ch->devno = dev_id.devno;
2859  if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
2860  return -ENOMEM;
2861  }
2862  return 0;
2863 }
2864 
2865 
2874 static int
2875 claw_new_device(struct ccwgroup_device *cgdev)
2876 {
2877  struct claw_privbk *privptr;
2878  struct claw_env *p_env;
2879  struct net_device *dev;
2880  int ret;
2881  struct ccw_dev_id dev_id;
2882 
2883  dev_info(&cgdev->dev, "add for %s\n",
2884  dev_name(&cgdev->cdev[READ_CHANNEL]->dev));
2885  CLAW_DBF_TEXT(2, setup, "new_dev");
2886  privptr = dev_get_drvdata(&cgdev->dev);
2887  dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, privptr);
2888  dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, privptr);
2889  if (!privptr)
2890  return -ENODEV;
2891  p_env = privptr->p_env;
2892  ccw_device_get_id(cgdev->cdev[READ_CHANNEL], &dev_id);
2893  p_env->devno[READ_CHANNEL] = dev_id.devno;
2894  ccw_device_get_id(cgdev->cdev[WRITE_CHANNEL], &dev_id);
2895  p_env->devno[WRITE_CHANNEL] = dev_id.devno;
2896  ret = add_channel(cgdev->cdev[0],0,privptr);
2897  if (ret == 0)
2898  ret = add_channel(cgdev->cdev[1],1,privptr);
2899  if (ret != 0) {
2900  dev_warn(&cgdev->dev, "Creating a CLAW group device"
2901  " failed with error code %d\n", ret);
2902  goto out;
2903  }
2904  ret = ccw_device_set_online(cgdev->cdev[READ_CHANNEL]);
2905  if (ret != 0) {
2906  dev_warn(&cgdev->dev,
2907  "Setting the read subchannel online"
2908  " failed with error code %d\n", ret);
2909  goto out;
2910  }
2911  ret = ccw_device_set_online(cgdev->cdev[WRITE_CHANNEL]);
2912  if (ret != 0) {
2913  dev_warn(&cgdev->dev,
2914  "Setting the write subchannel online "
2915  "failed with error code %d\n", ret);
2916  goto out;
2917  }
2918  dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
2919  if (!dev) {
2920  dev_warn(&cgdev->dev,
2921  "Activating the CLAW device failed\n");
2922  goto out;
2923  }
2924  dev->ml_priv = privptr;
2925  dev_set_drvdata(&cgdev->dev, privptr);
2926  dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, privptr);
2927  dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, privptr);
2928  /* sysfs magic */
2929  SET_NETDEV_DEV(dev, &cgdev->dev);
2930  if (register_netdev(dev) != 0) {
2931  claw_free_netdevice(dev, 1);
2932  CLAW_DBF_TEXT(2, trace, "regfail");
2933  goto out;
2934  }
2935  dev->flags &=~IFF_RUNNING;
2936  if (privptr->buffs_alloc == 0) {
2937  ret=init_ccw_bk(dev);
2938  if (ret !=0) {
2939  unregister_netdev(dev);
2940  claw_free_netdevice(dev,1);
2941  CLAW_DBF_TEXT(2, trace, "ccwmem");
2942  goto out;
2943  }
2944  }
2945  privptr->channel[READ_CHANNEL].ndev = dev;
2946  privptr->channel[WRITE_CHANNEL].ndev = dev;
2947  privptr->p_env->ndev = dev;
2948 
2949  dev_info(&cgdev->dev, "%s:readsize=%d writesize=%d "
2950  "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
2951  dev->name, p_env->read_size,
2952  p_env->write_size, p_env->read_buffers,
2953  p_env->write_buffers, p_env->devno[READ_CHANNEL],
2954  p_env->devno[WRITE_CHANNEL]);
2955  dev_info(&cgdev->dev, "%s:host_name:%.8s, adapter_name "
2956  ":%.8s api_type: %.8s\n",
2957  dev->name, p_env->host_name,
2958  p_env->adapter_name , p_env->api_type);
2959  return 0;
2960 out:
2961  ccw_device_set_offline(cgdev->cdev[1]);
2962  ccw_device_set_offline(cgdev->cdev[0]);
2963  return -ENODEV;
2964 }
2965 
2966 static void
2967 claw_purge_skb_queue(struct sk_buff_head *q)
2968 {
2969  struct sk_buff *skb;
2970 
2971  CLAW_DBF_TEXT(4, trace, "purgque");
2972  while ((skb = skb_dequeue(q))) {
2973  atomic_dec(&skb->users);
2974  dev_kfree_skb_any(skb);
2975  }
2976 }
2977 
2985 static int
2986 claw_shutdown_device(struct ccwgroup_device *cgdev)
2987 {
2988  struct claw_privbk *priv;
2989  struct net_device *ndev;
2990  int ret = 0;
2991 
2992  CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
2993  priv = dev_get_drvdata(&cgdev->dev);
2994  if (!priv)
2995  return -ENODEV;
2996  ndev = priv->channel[READ_CHANNEL].ndev;
2997  if (ndev) {
2998  /* Close the device */
2999  dev_info(&cgdev->dev, "%s: shutting down\n",
3000  ndev->name);
3001  if (ndev->flags & IFF_RUNNING)
3002  ret = claw_release(ndev);
3003  ndev->flags &=~IFF_RUNNING;
3004  unregister_netdev(ndev);
3005  ndev->ml_priv = NULL; /* cgdev data, not ndev's to free */
3006  claw_free_netdevice(ndev, 1);
3007  priv->channel[READ_CHANNEL].ndev = NULL;
3008  priv->channel[WRITE_CHANNEL].ndev = NULL;
3009  priv->p_env->ndev = NULL;
3010  }
3011  ccw_device_set_offline(cgdev->cdev[1]);
3012  ccw_device_set_offline(cgdev->cdev[0]);
3013  return ret;
3014 }
3015 
3016 static void
3017 claw_remove_device(struct ccwgroup_device *cgdev)
3018 {
3019  struct claw_privbk *priv;
3020 
3021  BUG_ON(!cgdev);
3022  CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
3023  priv = dev_get_drvdata(&cgdev->dev);
3024  BUG_ON(!priv);
3025  dev_info(&cgdev->dev, " will be removed.\n");
3026  if (cgdev->state == CCWGROUP_ONLINE)
3027  claw_shutdown_device(cgdev);
3028  kfree(priv->p_mtc_envelope);
3029  priv->p_mtc_envelope=NULL;
3030  kfree(priv->p_env);
3031  priv->p_env=NULL;
3032  kfree(priv->channel[0].irb);
3033  priv->channel[0].irb=NULL;
3034  kfree(priv->channel[1].irb);
3035  priv->channel[1].irb=NULL;
3036  kfree(priv);
3037  dev_set_drvdata(&cgdev->dev, NULL);
3038  dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, NULL);
3039  dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, NULL);
3040  put_device(&cgdev->dev);
3041 
3042  return;
3043 }
3044 
3045 
3046 /*
3047  * sysfs attributes
3048  */
3049 static ssize_t
3050 claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
3051 {
3052  struct claw_privbk *priv;
3053  struct claw_env * p_env;
3054 
3055  priv = dev_get_drvdata(dev);
3056  if (!priv)
3057  return -ENODEV;
3058  p_env = priv->p_env;
3059  return sprintf(buf, "%s\n",p_env->host_name);
3060 }
3061 
3062 static ssize_t
3063 claw_hname_write(struct device *dev, struct device_attribute *attr,
3064  const char *buf, size_t count)
3065 {
3066  struct claw_privbk *priv;
3067  struct claw_env * p_env;
3068 
3069  priv = dev_get_drvdata(dev);
3070  if (!priv)
3071  return -ENODEV;
3072  p_env = priv->p_env;
3073  if (count > MAX_NAME_LEN+1)
3074  return -EINVAL;
3075  memset(p_env->host_name, 0x20, MAX_NAME_LEN);
3076  strncpy(p_env->host_name,buf, count);
3077  p_env->host_name[count-1] = 0x20; /* clear extra 0x0a */
3078  p_env->host_name[MAX_NAME_LEN] = 0x00;
3079  CLAW_DBF_TEXT(2, setup, "HstnSet");
3080  CLAW_DBF_TEXT_(2, setup, "%s", p_env->host_name);
3081 
3082  return count;
3083 }
3084 
3085 static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
3086 
3087 static ssize_t
3088 claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
3089 {
3090  struct claw_privbk *priv;
3091  struct claw_env * p_env;
3092 
3093  priv = dev_get_drvdata(dev);
3094  if (!priv)
3095  return -ENODEV;
3096  p_env = priv->p_env;
3097  return sprintf(buf, "%s\n", p_env->adapter_name);
3098 }
3099 
3100 static ssize_t
3101 claw_adname_write(struct device *dev, struct device_attribute *attr,
3102  const char *buf, size_t count)
3103 {
3104  struct claw_privbk *priv;
3105  struct claw_env * p_env;
3106 
3107  priv = dev_get_drvdata(dev);
3108  if (!priv)
3109  return -ENODEV;
3110  p_env = priv->p_env;
3111  if (count > MAX_NAME_LEN+1)
3112  return -EINVAL;
3113  memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
3114  strncpy(p_env->adapter_name,buf, count);
3115  p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
3116  p_env->adapter_name[MAX_NAME_LEN] = 0x00;
3117  CLAW_DBF_TEXT(2, setup, "AdnSet");
3118  CLAW_DBF_TEXT_(2, setup, "%s", p_env->adapter_name);
3119 
3120  return count;
3121 }
3122 
3123 static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
3124 
3125 static ssize_t
3126 claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
3127 {
3128  struct claw_privbk *priv;
3129  struct claw_env * p_env;
3130 
3131  priv = dev_get_drvdata(dev);
3132  if (!priv)
3133  return -ENODEV;
3134  p_env = priv->p_env;
3135  return sprintf(buf, "%s\n",
3136  p_env->api_type);
3137 }
3138 
3139 static ssize_t
3140 claw_apname_write(struct device *dev, struct device_attribute *attr,
3141  const char *buf, size_t count)
3142 {
3143  struct claw_privbk *priv;
3144  struct claw_env * p_env;
3145 
3146  priv = dev_get_drvdata(dev);
3147  if (!priv)
3148  return -ENODEV;
3149  p_env = priv->p_env;
3150  if (count > MAX_NAME_LEN+1)
3151  return -EINVAL;
3152  memset(p_env->api_type, 0x20, MAX_NAME_LEN);
3153  strncpy(p_env->api_type,buf, count);
3154  p_env->api_type[count-1] = 0x20; /* we get a loose 0x0a */
3155  p_env->api_type[MAX_NAME_LEN] = 0x00;
3156  if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
3157  p_env->read_size=DEF_PACK_BUFSIZE;
3158  p_env->write_size=DEF_PACK_BUFSIZE;
3159  p_env->packing=PACKING_ASK;
3160  CLAW_DBF_TEXT(2, setup, "PACKING");
3161  }
3162  else {
3163  p_env->packing=0;
3164  p_env->read_size=CLAW_FRAME_SIZE;
3165  p_env->write_size=CLAW_FRAME_SIZE;
3166  CLAW_DBF_TEXT(2, setup, "ApiSet");
3167  }
3168  CLAW_DBF_TEXT_(2, setup, "%s", p_env->api_type);
3169  return count;
3170 }
3171 
3172 static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
3173 
3174 static ssize_t
3175 claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
3176 {
3177  struct claw_privbk *priv;
3178  struct claw_env * p_env;
3179 
3180  priv = dev_get_drvdata(dev);
3181  if (!priv)
3182  return -ENODEV;
3183  p_env = priv->p_env;
3184  return sprintf(buf, "%d\n", p_env->write_buffers);
3185 }
3186 
3187 static ssize_t
3188 claw_wbuff_write(struct device *dev, struct device_attribute *attr,
3189  const char *buf, size_t count)
3190 {
3191  struct claw_privbk *priv;
3192  struct claw_env * p_env;
3193  int nnn,max;
3194 
3195  priv = dev_get_drvdata(dev);
3196  if (!priv)
3197  return -ENODEV;
3198  p_env = priv->p_env;
3199  sscanf(buf, "%i", &nnn);
3200  if (p_env->packing) {
3201  max = 64;
3202  }
3203  else {
3204  max = 512;
3205  }
3206  if ((nnn > max ) || (nnn < 2))
3207  return -EINVAL;
3208  p_env->write_buffers = nnn;
3209  CLAW_DBF_TEXT(2, setup, "Wbufset");
3210  CLAW_DBF_TEXT_(2, setup, "WB=%d", p_env->write_buffers);
3211  return count;
3212 }
3213 
3214 static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
3215 
3216 static ssize_t
3217 claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
3218 {
3219  struct claw_privbk *priv;
3220  struct claw_env * p_env;
3221 
3222  priv = dev_get_drvdata(dev);
3223  if (!priv)
3224  return -ENODEV;
3225  p_env = priv->p_env;
3226  return sprintf(buf, "%d\n", p_env->read_buffers);
3227 }
3228 
3229 static ssize_t
3230 claw_rbuff_write(struct device *dev, struct device_attribute *attr,
3231  const char *buf, size_t count)
3232 {
3233  struct claw_privbk *priv;
3234  struct claw_env *p_env;
3235  int nnn,max;
3236 
3237  priv = dev_get_drvdata(dev);
3238  if (!priv)
3239  return -ENODEV;
3240  p_env = priv->p_env;
3241  sscanf(buf, "%i", &nnn);
3242  if (p_env->packing) {
3243  max = 64;
3244  }
3245  else {
3246  max = 512;
3247  }
3248  if ((nnn > max ) || (nnn < 2))
3249  return -EINVAL;
3250  p_env->read_buffers = nnn;
3251  CLAW_DBF_TEXT(2, setup, "Rbufset");
3252  CLAW_DBF_TEXT_(2, setup, "RB=%d", p_env->read_buffers);
3253  return count;
3254 }
3255 static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
3256 
3257 static struct attribute *claw_attr[] = {
3258  &dev_attr_read_buffer.attr,
3259  &dev_attr_write_buffer.attr,
3260  &dev_attr_adapter_name.attr,
3261  &dev_attr_api_type.attr,
3262  &dev_attr_host_name.attr,
3263  NULL,
3264 };
3265 static struct attribute_group claw_attr_group = {
3266  .attrs = claw_attr,
3267 };
3268 static const struct attribute_group *claw_attr_groups[] = {
3269  &claw_attr_group,
3270  NULL,
3271 };
3272 static const struct device_type claw_devtype = {
3273  .name = "claw",
3274  .groups = claw_attr_groups,
3275 };
3276 
3277 /*----------------------------------------------------------------*
3278  * claw_probe *
3279  * this function is called for each CLAW device. *
3280  *----------------------------------------------------------------*/
3281 static int claw_probe(struct ccwgroup_device *cgdev)
3282 {
3283  struct claw_privbk *privptr = NULL;
3284 
3285  CLAW_DBF_TEXT(2, setup, "probe");
3286  if (!get_device(&cgdev->dev))
3287  return -ENODEV;
3288  privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL);
3289  dev_set_drvdata(&cgdev->dev, privptr);
3290  if (privptr == NULL) {
3291  probe_error(cgdev);
3292  put_device(&cgdev->dev);
3293  CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
3294  return -ENOMEM;
3295  }
3296  privptr->p_mtc_envelope = kzalloc(MAX_ENVELOPE_SIZE, GFP_KERNEL);
3297  privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL);
3298  if ((privptr->p_mtc_envelope == NULL) || (privptr->p_env == NULL)) {
3299  probe_error(cgdev);
3300  put_device(&cgdev->dev);
3301  CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
3302  return -ENOMEM;
3303  }
3304  memcpy(privptr->p_env->adapter_name, WS_NAME_NOT_DEF, 8);
3305  memcpy(privptr->p_env->host_name, WS_NAME_NOT_DEF, 8);
3306  memcpy(privptr->p_env->api_type, WS_NAME_NOT_DEF, 8);
3307  privptr->p_env->packing = 0;
3308  privptr->p_env->write_buffers = 5;
3309  privptr->p_env->read_buffers = 5;
3310  privptr->p_env->read_size = CLAW_FRAME_SIZE;
3311  privptr->p_env->write_size = CLAW_FRAME_SIZE;
3312  privptr->p_env->p_priv = privptr;
3313  cgdev->cdev[0]->handler = claw_irq_handler;
3314  cgdev->cdev[1]->handler = claw_irq_handler;
3315  cgdev->dev.type = &claw_devtype;
3316  CLAW_DBF_TEXT(2, setup, "prbext 0");
3317 
3318  return 0;
3319 } /* end of claw_probe */
3320 
3321 /*--------------------------------------------------------------------*
3322 * claw_init and cleanup *
3323 *---------------------------------------------------------------------*/
3324 
3325 static void __exit claw_cleanup(void)
3326 {
3327  ccwgroup_driver_unregister(&claw_group_driver);
3328  ccw_driver_unregister(&claw_ccw_driver);
3329  root_device_unregister(claw_root_dev);
3330  claw_unregister_debug_facility();
3331  pr_info("Driver unloaded\n");
3332 }
3333 
3340 static int __init claw_init(void)
3341 {
3342  int ret = 0;
3343 
3344  pr_info("Loading %s\n", version);
3345  ret = claw_register_debug_facility();
3346  if (ret) {
3347  pr_err("Registering with the S/390 debug feature"
3348  " failed with error code %d\n", ret);
3349  goto out_err;
3350  }
3351  CLAW_DBF_TEXT(2, setup, "init_mod");
3352  claw_root_dev = root_device_register("claw");
3353  ret = IS_ERR(claw_root_dev) ? PTR_ERR(claw_root_dev) : 0;
3354  if (ret)
3355  goto register_err;
3356  ret = ccw_driver_register(&claw_ccw_driver);
3357  if (ret)
3358  goto ccw_err;
3359  claw_group_driver.driver.groups = claw_drv_attr_groups;
3360  ret = ccwgroup_driver_register(&claw_group_driver);
3361  if (ret)
3362  goto ccwgroup_err;
3363  return 0;
3364 
3365 ccwgroup_err:
3366  ccw_driver_unregister(&claw_ccw_driver);
3367 ccw_err:
3368  root_device_unregister(claw_root_dev);
3369 register_err:
3370  CLAW_DBF_TEXT(2, setup, "init_bad");
3371  claw_unregister_debug_facility();
3372 out_err:
3373  pr_err("Initializing the claw device driver failed\n");
3374  return ret;
3375 }
3376 
3377 module_init(claw_init);
3378 module_exit(claw_cleanup);
3379 
3380 MODULE_AUTHOR("Andy Richter <[email protected]>");
3381 MODULE_DESCRIPTION("Linux for System z CLAW Driver\n" \
3382  "Copyright IBM Corp. 2000, 2008\n");
3383 MODULE_LICENSE("GPL");
Generated on Thu Jan 10 2013 14:18:05 for Linux Kernel by   doxygen 1.8.2