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