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[deliverable/linux.git] / drivers / s390 / net / claw.c
1 /*
2 * drivers/s390/net/claw.c
3 * ESCON CLAW network driver
4 *
5 * Linux for zSeries version
6 * Copyright (C) 2002,2005 IBM Corporation
7 * Author(s) Original code written by:
8 * Kazuo Iimura (iimura@jp.ibm.com)
9 * Rewritten by
10 * Andy Richter (richtera@us.ibm.com)
11 * Marc Price (mwprice@us.ibm.com)
12 *
13 * sysfs parms:
14 * group x.x.rrrr,x.x.wwww
15 * read_buffer nnnnnnn
16 * write_buffer nnnnnn
17 * host_name aaaaaaaa
18 * adapter_name aaaaaaaa
19 * api_type aaaaaaaa
20 *
21 * eg.
22 * group 0.0.0200 0.0.0201
23 * read_buffer 25
24 * write_buffer 20
25 * host_name LINUX390
26 * adapter_name RS6K
27 * api_type TCPIP
28 *
29 * where
30 *
31 * The device id is decided by the order entries
32 * are added to the group the first is claw0 the second claw1
33 * up to CLAW_MAX_DEV
34 *
35 * rrrr - the first of 2 consecutive device addresses used for the
36 * CLAW protocol.
37 * The specified address is always used as the input (Read)
38 * channel and the next address is used as the output channel.
39 *
40 * wwww - the second of 2 consecutive device addresses used for
41 * the CLAW protocol.
42 * The specified address is always used as the output
43 * channel and the previous address is used as the input channel.
44 *
45 * read_buffer - specifies number of input buffers to allocate.
46 * write_buffer - specifies number of output buffers to allocate.
47 * host_name - host name
48 * adaptor_name - adaptor name
49 * api_type - API type TCPIP or API will be sent and expected
50 * as ws_name
51 *
52 * Note the following requirements:
53 * 1) host_name must match the configured adapter_name on the remote side
54 * 2) adaptor_name must match the configured host name on the remote side
55 *
56 * Change History
57 * 1.00 Initial release shipped
58 * 1.10 Changes for Buffer allocation
59 * 1.15 Changed for 2.6 Kernel No longer compiles on 2.4 or lower
60 * 1.25 Added Packing support
61 */
62 #include <asm/ccwdev.h>
63 #include <asm/ccwgroup.h>
64 #include <asm/debug.h>
65 #include <asm/idals.h>
66 #include <asm/io.h>
67
68 #include <linux/bitops.h>
69 #include <linux/ctype.h>
70 #include <linux/delay.h>
71 #include <linux/errno.h>
72 #include <linux/if_arp.h>
73 #include <linux/init.h>
74 #include <linux/interrupt.h>
75 #include <linux/ip.h>
76 #include <linux/kernel.h>
77 #include <linux/module.h>
78 #include <linux/netdevice.h>
79 #include <linux/etherdevice.h>
80 #include <linux/proc_fs.h>
81 #include <linux/sched.h>
82 #include <linux/signal.h>
83 #include <linux/skbuff.h>
84 #include <linux/slab.h>
85 #include <linux/string.h>
86 #include <linux/tcp.h>
87 #include <linux/timer.h>
88 #include <linux/types.h>
89
90 #include "cu3088.h"
91 #include "claw.h"
92
93 MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
94 MODULE_DESCRIPTION("Linux for zSeries CLAW Driver\n" \
95 "Copyright 2000,2005 IBM Corporation\n");
96 MODULE_LICENSE("GPL");
97
98 /* Debugging is based on DEBUGMSG, IOTRACE, or FUNCTRACE options:
99 DEBUGMSG - Enables output of various debug messages in the code
100 IOTRACE - Enables output of CCW and other IO related traces
101 FUNCTRACE - Enables output of function entry/exit trace
102 Define any combination of above options to enable tracing
103
104 CLAW also uses the s390dbf file system see claw_trace and claw_setup
105 */
106
107 /* following enables tracing */
108 //#define DEBUGMSG
109 //#define IOTRACE
110 //#define FUNCTRACE
111
112 #ifdef DEBUGMSG
113 #define DEBUG
114 #endif
115
116 #ifdef IOTRACE
117 #define DEBUG
118 #endif
119
120 #ifdef FUNCTRACE
121 #define DEBUG
122 #endif
123
124 static char debug_buffer[255];
125 /**
126 * Debug Facility Stuff
127 */
128 static debug_info_t *claw_dbf_setup;
129 static debug_info_t *claw_dbf_trace;
130
131 /**
132 * CLAW Debug Facility functions
133 */
134 static void
135 claw_unregister_debug_facility(void)
136 {
137 if (claw_dbf_setup)
138 debug_unregister(claw_dbf_setup);
139 if (claw_dbf_trace)
140 debug_unregister(claw_dbf_trace);
141 }
142
143 static int
144 claw_register_debug_facility(void)
145 {
146 claw_dbf_setup = debug_register("claw_setup", 2, 1, 8);
147 claw_dbf_trace = debug_register("claw_trace", 2, 2, 8);
148 if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
149 printk(KERN_WARNING "Not enough memory for debug facility.\n");
150 claw_unregister_debug_facility();
151 return -ENOMEM;
152 }
153 debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
154 debug_set_level(claw_dbf_setup, 2);
155 debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
156 debug_set_level(claw_dbf_trace, 2);
157 return 0;
158 }
159
160 static inline void
161 claw_set_busy(struct net_device *dev)
162 {
163 ((struct claw_privbk *) dev->priv)->tbusy=1;
164 eieio();
165 }
166
167 static inline void
168 claw_clear_busy(struct net_device *dev)
169 {
170 clear_bit(0, &(((struct claw_privbk *) dev->priv)->tbusy));
171 netif_wake_queue(dev);
172 eieio();
173 }
174
175 static inline int
176 claw_check_busy(struct net_device *dev)
177 {
178 eieio();
179 return ((struct claw_privbk *) dev->priv)->tbusy;
180 }
181
182 static inline void
183 claw_setbit_busy(int nr,struct net_device *dev)
184 {
185 netif_stop_queue(dev);
186 set_bit(nr, (void *)&(((struct claw_privbk *)dev->priv)->tbusy));
187 }
188
189 static inline void
190 claw_clearbit_busy(int nr,struct net_device *dev)
191 {
192 clear_bit(nr,(void *)&(((struct claw_privbk *)dev->priv)->tbusy));
193 netif_wake_queue(dev);
194 }
195
196 static inline int
197 claw_test_and_setbit_busy(int nr,struct net_device *dev)
198 {
199 netif_stop_queue(dev);
200 return test_and_set_bit(nr,
201 (void *)&(((struct claw_privbk *) dev->priv)->tbusy));
202 }
203
204
205 /* Functions for the DEV methods */
206
207 static int claw_probe(struct ccwgroup_device *cgdev);
208 static void claw_remove_device(struct ccwgroup_device *cgdev);
209 static void claw_purge_skb_queue(struct sk_buff_head *q);
210 static int claw_new_device(struct ccwgroup_device *cgdev);
211 static int claw_shutdown_device(struct ccwgroup_device *cgdev);
212 static int claw_tx(struct sk_buff *skb, struct net_device *dev);
213 static int claw_change_mtu( struct net_device *dev, int new_mtu);
214 static int claw_open(struct net_device *dev);
215 static void claw_irq_handler(struct ccw_device *cdev,
216 unsigned long intparm, struct irb *irb);
217 static void claw_irq_tasklet ( unsigned long data );
218 static int claw_release(struct net_device *dev);
219 static void claw_write_retry ( struct chbk * p_ch );
220 static void claw_write_next ( struct chbk * p_ch );
221 static void claw_timer ( struct chbk * p_ch );
222
223 /* Functions */
224 static int add_claw_reads(struct net_device *dev,
225 struct ccwbk* p_first, struct ccwbk* p_last);
226 static void ccw_check_return_code (struct ccw_device *cdev, int return_code);
227 static void ccw_check_unit_check (struct chbk * p_ch, unsigned char sense );
228 static int find_link(struct net_device *dev, char *host_name, char *ws_name );
229 static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
230 static int init_ccw_bk(struct net_device *dev);
231 static void probe_error( struct ccwgroup_device *cgdev);
232 static struct net_device_stats *claw_stats(struct net_device *dev);
233 static int pages_to_order_of_mag(int num_of_pages);
234 static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
235 #ifdef DEBUG
236 static void dumpit (char *buf, int len);
237 #endif
238 /* sysfs Functions */
239 static ssize_t claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf);
240 static ssize_t claw_hname_write(struct device *dev, struct device_attribute *attr,
241 const char *buf, size_t count);
242 static ssize_t claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf);
243 static ssize_t claw_adname_write(struct device *dev, struct device_attribute *attr,
244 const char *buf, size_t count);
245 static ssize_t claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf);
246 static ssize_t claw_apname_write(struct device *dev, struct device_attribute *attr,
247 const char *buf, size_t count);
248 static ssize_t claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
249 static ssize_t claw_wbuff_write(struct device *dev, struct device_attribute *attr,
250 const char *buf, size_t count);
251 static ssize_t claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
252 static ssize_t claw_rbuff_write(struct device *dev, struct device_attribute *attr,
253 const char *buf, size_t count);
254 static int claw_add_files(struct device *dev);
255 static void claw_remove_files(struct device *dev);
256
257 /* Functions for System Validate */
258 static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
259 static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
260 __u8 correlator, __u8 rc , char *local_name, char *remote_name);
261 static int claw_snd_conn_req(struct net_device *dev, __u8 link);
262 static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
263 static int claw_snd_sys_validate_rsp(struct net_device *dev,
264 struct clawctl * p_ctl, __u32 return_code);
265 static int claw_strt_conn_req(struct net_device *dev );
266 static void claw_strt_read ( struct net_device *dev, int lock );
267 static void claw_strt_out_IO( struct net_device *dev );
268 static void claw_free_wrt_buf( struct net_device *dev );
269
270 /* Functions for unpack reads */
271 static void unpack_read (struct net_device *dev );
272
273 /* ccwgroup table */
274
275 static struct ccwgroup_driver claw_group_driver = {
276 .owner = THIS_MODULE,
277 .name = "claw",
278 .max_slaves = 2,
279 .driver_id = 0xC3D3C1E6,
280 .probe = claw_probe,
281 .remove = claw_remove_device,
282 .set_online = claw_new_device,
283 .set_offline = claw_shutdown_device,
284 };
285
286 /*
287 *
288 * Key functions
289 */
290
291 /*----------------------------------------------------------------*
292 * claw_probe *
293 * this function is called for each CLAW device. *
294 *----------------------------------------------------------------*/
295 static int
296 claw_probe(struct ccwgroup_device *cgdev)
297 {
298 int rc;
299 struct claw_privbk *privptr=NULL;
300
301 #ifdef FUNCTRACE
302 printk(KERN_INFO "%s Enter\n",__FUNCTION__);
303 #endif
304 CLAW_DBF_TEXT(2,setup,"probe");
305 if (!get_device(&cgdev->dev))
306 return -ENODEV;
307 #ifdef DEBUGMSG
308 printk(KERN_INFO "claw: variable cgdev =\n");
309 dumpit((char *)cgdev, sizeof(struct ccwgroup_device));
310 #endif
311 privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL);
312 if (privptr == NULL) {
313 probe_error(cgdev);
314 put_device(&cgdev->dev);
315 printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
316 cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
317 CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
318 return -ENOMEM;
319 }
320 privptr->p_mtc_envelope= kzalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
321 privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL);
322 if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
323 probe_error(cgdev);
324 put_device(&cgdev->dev);
325 printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
326 cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
327 CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
328 return -ENOMEM;
329 }
330 memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
331 memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
332 memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
333 privptr->p_env->packing = 0;
334 privptr->p_env->write_buffers = 5;
335 privptr->p_env->read_buffers = 5;
336 privptr->p_env->read_size = CLAW_FRAME_SIZE;
337 privptr->p_env->write_size = CLAW_FRAME_SIZE;
338 rc = claw_add_files(&cgdev->dev);
339 if (rc) {
340 probe_error(cgdev);
341 put_device(&cgdev->dev);
342 printk(KERN_WARNING "add_files failed %s %s Exit Line %d \n",
343 cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
344 CLAW_DBF_TEXT_(2,setup,"probex%d",rc);
345 return rc;
346 }
347 printk(KERN_INFO "claw: sysfs files added for %s\n",cgdev->cdev[0]->dev.bus_id);
348 privptr->p_env->p_priv = privptr;
349 cgdev->cdev[0]->handler = claw_irq_handler;
350 cgdev->cdev[1]->handler = claw_irq_handler;
351 cgdev->dev.driver_data = privptr;
352 #ifdef FUNCTRACE
353 printk(KERN_INFO "claw:%s exit on line %d, "
354 "rc = 0\n",__FUNCTION__,__LINE__);
355 #endif
356 CLAW_DBF_TEXT(2,setup,"prbext 0");
357
358 return 0;
359 } /* end of claw_probe */
360
361 /*-------------------------------------------------------------------*
362 * claw_tx *
363 *-------------------------------------------------------------------*/
364
365 static int
366 claw_tx(struct sk_buff *skb, struct net_device *dev)
367 {
368 int rc;
369 struct claw_privbk *privptr=dev->priv;
370 unsigned long saveflags;
371 struct chbk *p_ch;
372
373 #ifdef FUNCTRACE
374 printk(KERN_INFO "%s:%s enter\n",dev->name,__FUNCTION__);
375 #endif
376 CLAW_DBF_TEXT(4,trace,"claw_tx");
377 p_ch=&privptr->channel[WRITE];
378 if (skb == NULL) {
379 printk(KERN_WARNING "%s: null pointer passed as sk_buffer\n",
380 dev->name);
381 privptr->stats.tx_dropped++;
382 #ifdef FUNCTRACE
383 printk(KERN_INFO "%s: %s() exit on line %d, rc = EIO\n",
384 dev->name,__FUNCTION__, __LINE__);
385 #endif
386 CLAW_DBF_TEXT_(2,trace,"clawtx%d",-EIO);
387 return -EIO;
388 }
389
390 #ifdef IOTRACE
391 printk(KERN_INFO "%s: variable sk_buff=\n",dev->name);
392 dumpit((char *) skb, sizeof(struct sk_buff));
393 printk(KERN_INFO "%s: variable dev=\n",dev->name);
394 dumpit((char *) dev, sizeof(struct net_device));
395 #endif
396 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
397 rc=claw_hw_tx( skb, dev, 1 );
398 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
399 #ifdef FUNCTRACE
400 printk(KERN_INFO "%s:%s exit on line %d, rc = %d\n",
401 dev->name, __FUNCTION__, __LINE__, rc);
402 #endif
403 CLAW_DBF_TEXT_(4,trace,"clawtx%d",rc);
404 return rc;
405 } /* end of claw_tx */
406
407 /*------------------------------------------------------------------*
408 * pack the collect queue into an skb and return it *
409 * If not packing just return the top skb from the queue *
410 *------------------------------------------------------------------*/
411
412 static struct sk_buff *
413 claw_pack_skb(struct claw_privbk *privptr)
414 {
415 struct sk_buff *new_skb,*held_skb;
416 struct chbk *p_ch = &privptr->channel[WRITE];
417 struct claw_env *p_env = privptr->p_env;
418 int pkt_cnt,pk_ind,so_far;
419
420 new_skb = NULL; /* assume no dice */
421 pkt_cnt = 0;
422 CLAW_DBF_TEXT(4,trace,"PackSKBe");
423 if (!skb_queue_empty(&p_ch->collect_queue)) {
424 /* some data */
425 held_skb = skb_dequeue(&p_ch->collect_queue);
426 if (held_skb)
427 dev_kfree_skb_any(held_skb);
428 else
429 return NULL;
430 if (p_env->packing != DO_PACKED)
431 return held_skb;
432 /* get a new SKB we will pack at least one */
433 new_skb = dev_alloc_skb(p_env->write_size);
434 if (new_skb == NULL) {
435 atomic_inc(&held_skb->users);
436 skb_queue_head(&p_ch->collect_queue,held_skb);
437 return NULL;
438 }
439 /* we have packed packet and a place to put it */
440 pk_ind = 1;
441 so_far = 0;
442 new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
443 while ((pk_ind) && (held_skb != NULL)) {
444 if (held_skb->len+so_far <= p_env->write_size-8) {
445 memcpy(skb_put(new_skb,held_skb->len),
446 held_skb->data,held_skb->len);
447 privptr->stats.tx_packets++;
448 so_far += held_skb->len;
449 pkt_cnt++;
450 dev_kfree_skb_any(held_skb);
451 held_skb = skb_dequeue(&p_ch->collect_queue);
452 if (held_skb)
453 atomic_dec(&held_skb->users);
454 } else {
455 pk_ind = 0;
456 atomic_inc(&held_skb->users);
457 skb_queue_head(&p_ch->collect_queue,held_skb);
458 }
459 }
460 #ifdef IOTRACE
461 printk(KERN_INFO "%s: %s() Packed %d len %d\n",
462 p_env->ndev->name,
463 __FUNCTION__,pkt_cnt,new_skb->len);
464 #endif
465 }
466 CLAW_DBF_TEXT(4,trace,"PackSKBx");
467 return new_skb;
468 }
469
470 /*-------------------------------------------------------------------*
471 * claw_change_mtu *
472 * *
473 *-------------------------------------------------------------------*/
474
475 static int
476 claw_change_mtu(struct net_device *dev, int new_mtu)
477 {
478 struct claw_privbk *privptr=dev->priv;
479 int buff_size;
480 #ifdef FUNCTRACE
481 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
482 #endif
483 #ifdef DEBUGMSG
484 printk(KERN_INFO "variable dev =\n");
485 dumpit((char *) dev, sizeof(struct net_device));
486 printk(KERN_INFO "variable new_mtu = %d\n", new_mtu);
487 #endif
488 CLAW_DBF_TEXT(4,trace,"setmtu");
489 buff_size = privptr->p_env->write_size;
490 if ((new_mtu < 60) || (new_mtu > buff_size)) {
491 #ifdef FUNCTRACE
492 printk(KERN_INFO "%s:%s Exit on line %d, rc=EINVAL\n",
493 dev->name,
494 __FUNCTION__, __LINE__);
495 #endif
496 return -EINVAL;
497 }
498 dev->mtu = new_mtu;
499 #ifdef FUNCTRACE
500 printk(KERN_INFO "%s:%s Exit on line %d\n",dev->name,
501 __FUNCTION__, __LINE__);
502 #endif
503 return 0;
504 } /* end of claw_change_mtu */
505
506
507 /*-------------------------------------------------------------------*
508 * claw_open *
509 * *
510 *-------------------------------------------------------------------*/
511 static int
512 claw_open(struct net_device *dev)
513 {
514
515 int rc;
516 int i;
517 unsigned long saveflags=0;
518 unsigned long parm;
519 struct claw_privbk *privptr;
520 DECLARE_WAITQUEUE(wait, current);
521 struct timer_list timer;
522 struct ccwbk *p_buf;
523
524 #ifdef FUNCTRACE
525 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
526 #endif
527 CLAW_DBF_TEXT(4,trace,"open");
528 if (!dev || (dev->name[0] == 0x00)) {
529 CLAW_DBF_TEXT(2,trace,"BadDev");
530 printk(KERN_WARNING "claw: Bad device at open failing \n");
531 return -ENODEV;
532 }
533 privptr = (struct claw_privbk *)dev->priv;
534 /* allocate and initialize CCW blocks */
535 if (privptr->buffs_alloc == 0) {
536 rc=init_ccw_bk(dev);
537 if (rc) {
538 printk(KERN_INFO "%s:%s Exit on line %d, rc=ENOMEM\n",
539 dev->name,
540 __FUNCTION__, __LINE__);
541 CLAW_DBF_TEXT(2,trace,"openmem");
542 return -ENOMEM;
543 }
544 }
545 privptr->system_validate_comp=0;
546 privptr->release_pend=0;
547 if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
548 privptr->p_env->read_size=DEF_PACK_BUFSIZE;
549 privptr->p_env->write_size=DEF_PACK_BUFSIZE;
550 privptr->p_env->packing=PACKING_ASK;
551 } else {
552 privptr->p_env->packing=0;
553 privptr->p_env->read_size=CLAW_FRAME_SIZE;
554 privptr->p_env->write_size=CLAW_FRAME_SIZE;
555 }
556 claw_set_busy(dev);
557 tasklet_init(&privptr->channel[READ].tasklet, claw_irq_tasklet,
558 (unsigned long) &privptr->channel[READ]);
559 for ( i = 0; i < 2; i++) {
560 CLAW_DBF_TEXT_(2,trace,"opn_ch%d",i);
561 init_waitqueue_head(&privptr->channel[i].wait);
562 /* skb_queue_head_init(&p_ch->io_queue); */
563 if (i == WRITE)
564 skb_queue_head_init(
565 &privptr->channel[WRITE].collect_queue);
566 privptr->channel[i].flag_a = 0;
567 privptr->channel[i].IO_active = 0;
568 privptr->channel[i].flag &= ~CLAW_TIMER;
569 init_timer(&timer);
570 timer.function = (void *)claw_timer;
571 timer.data = (unsigned long)(&privptr->channel[i]);
572 timer.expires = jiffies + 15*HZ;
573 add_timer(&timer);
574 spin_lock_irqsave(get_ccwdev_lock(
575 privptr->channel[i].cdev), saveflags);
576 parm = (unsigned long) &privptr->channel[i];
577 privptr->channel[i].claw_state = CLAW_START_HALT_IO;
578 rc = 0;
579 add_wait_queue(&privptr->channel[i].wait, &wait);
580 rc = ccw_device_halt(
581 (struct ccw_device *)privptr->channel[i].cdev,parm);
582 set_current_state(TASK_INTERRUPTIBLE);
583 spin_unlock_irqrestore(
584 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
585 schedule();
586 set_current_state(TASK_RUNNING);
587 remove_wait_queue(&privptr->channel[i].wait, &wait);
588 if(rc != 0)
589 ccw_check_return_code(privptr->channel[i].cdev, rc);
590 if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
591 del_timer(&timer);
592 }
593 if ((((privptr->channel[READ].last_dstat |
594 privptr->channel[WRITE].last_dstat) &
595 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
596 (((privptr->channel[READ].flag |
597 privptr->channel[WRITE].flag) & CLAW_TIMER) != 0x00)) {
598 #ifdef DEBUGMSG
599 printk(KERN_INFO "%s: channel problems during open - read:"
600 " %02x - write: %02x\n",
601 dev->name,
602 privptr->channel[READ].last_dstat,
603 privptr->channel[WRITE].last_dstat);
604 #endif
605 printk(KERN_INFO "%s: remote side is not ready\n", dev->name);
606 CLAW_DBF_TEXT(2,trace,"notrdy");
607
608 for ( i = 0; i < 2; i++) {
609 spin_lock_irqsave(
610 get_ccwdev_lock(privptr->channel[i].cdev),
611 saveflags);
612 parm = (unsigned long) &privptr->channel[i];
613 privptr->channel[i].claw_state = CLAW_STOP;
614 rc = ccw_device_halt(
615 (struct ccw_device *)&privptr->channel[i].cdev,
616 parm);
617 spin_unlock_irqrestore(
618 get_ccwdev_lock(privptr->channel[i].cdev),
619 saveflags);
620 if (rc != 0) {
621 ccw_check_return_code(
622 privptr->channel[i].cdev, rc);
623 }
624 }
625 free_pages((unsigned long)privptr->p_buff_ccw,
626 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
627 if (privptr->p_env->read_size < PAGE_SIZE) {
628 free_pages((unsigned long)privptr->p_buff_read,
629 (int)pages_to_order_of_mag(
630 privptr->p_buff_read_num));
631 }
632 else {
633 p_buf=privptr->p_read_active_first;
634 while (p_buf!=NULL) {
635 free_pages((unsigned long)p_buf->p_buffer,
636 (int)pages_to_order_of_mag(
637 privptr->p_buff_pages_perread ));
638 p_buf=p_buf->next;
639 }
640 }
641 if (privptr->p_env->write_size < PAGE_SIZE ) {
642 free_pages((unsigned long)privptr->p_buff_write,
643 (int)pages_to_order_of_mag(
644 privptr->p_buff_write_num));
645 }
646 else {
647 p_buf=privptr->p_write_active_first;
648 while (p_buf!=NULL) {
649 free_pages((unsigned long)p_buf->p_buffer,
650 (int)pages_to_order_of_mag(
651 privptr->p_buff_pages_perwrite ));
652 p_buf=p_buf->next;
653 }
654 }
655 privptr->buffs_alloc = 0;
656 privptr->channel[READ].flag= 0x00;
657 privptr->channel[WRITE].flag = 0x00;
658 privptr->p_buff_ccw=NULL;
659 privptr->p_buff_read=NULL;
660 privptr->p_buff_write=NULL;
661 claw_clear_busy(dev);
662 #ifdef FUNCTRACE
663 printk(KERN_INFO "%s:%s Exit on line %d, rc=EIO\n",
664 dev->name,__FUNCTION__,__LINE__);
665 #endif
666 CLAW_DBF_TEXT(2,trace,"open EIO");
667 return -EIO;
668 }
669
670 /* Send SystemValidate command */
671
672 claw_clear_busy(dev);
673
674 #ifdef FUNCTRACE
675 printk(KERN_INFO "%s:%s Exit on line %d, rc=0\n",
676 dev->name,__FUNCTION__,__LINE__);
677 #endif
678 CLAW_DBF_TEXT(4,trace,"openok");
679 return 0;
680 } /* end of claw_open */
681
682 /*-------------------------------------------------------------------*
683 * *
684 * claw_irq_handler *
685 * *
686 *--------------------------------------------------------------------*/
687 static void
688 claw_irq_handler(struct ccw_device *cdev,
689 unsigned long intparm, struct irb *irb)
690 {
691 struct chbk *p_ch = NULL;
692 struct claw_privbk *privptr = NULL;
693 struct net_device *dev = NULL;
694 struct claw_env *p_env;
695 struct chbk *p_ch_r=NULL;
696
697
698 #ifdef FUNCTRACE
699 printk(KERN_INFO "%s enter \n",__FUNCTION__);
700 #endif
701 CLAW_DBF_TEXT(4,trace,"clawirq");
702 /* Bypass all 'unsolicited interrupts' */
703 if (!cdev->dev.driver_data) {
704 printk(KERN_WARNING "claw: unsolicited interrupt for device:"
705 "%s received c-%02x d-%02x\n",
706 cdev->dev.bus_id,irb->scsw.cstat, irb->scsw.dstat);
707 #ifdef FUNCTRACE
708 printk(KERN_INFO "claw: %s() "
709 "exit on line %d\n",__FUNCTION__,__LINE__);
710 #endif
711 CLAW_DBF_TEXT(2,trace,"badirq");
712 return;
713 }
714 privptr = (struct claw_privbk *)cdev->dev.driver_data;
715
716 /* Try to extract channel from driver data. */
717 if (privptr->channel[READ].cdev == cdev)
718 p_ch = &privptr->channel[READ];
719 else if (privptr->channel[WRITE].cdev == cdev)
720 p_ch = &privptr->channel[WRITE];
721 else {
722 printk(KERN_WARNING "claw: Can't determine channel for "
723 "interrupt, device %s\n", cdev->dev.bus_id);
724 CLAW_DBF_TEXT(2,trace,"badchan");
725 return;
726 }
727 CLAW_DBF_TEXT_(4,trace,"IRQCH=%d",p_ch->flag);
728
729 dev = (struct net_device *) (p_ch->ndev);
730 p_env=privptr->p_env;
731
732 #ifdef IOTRACE
733 printk(KERN_INFO "%s: interrupt for device: %04x "
734 "received c-%02x d-%02x state-%02x\n",
735 dev->name, p_ch->devno, irb->scsw.cstat,
736 irb->scsw.dstat, p_ch->claw_state);
737 #endif
738
739 /* Copy interruption response block. */
740 memcpy(p_ch->irb, irb, sizeof(struct irb));
741
742 /* Check for good subchannel return code, otherwise error message */
743 if (irb->scsw.cstat && !(irb->scsw.cstat & SCHN_STAT_PCI)) {
744 printk(KERN_INFO "%s: subchannel check for device: %04x -"
745 " Sch Stat %02x Dev Stat %02x CPA - %04x\n",
746 dev->name, p_ch->devno,
747 irb->scsw.cstat, irb->scsw.dstat,irb->scsw.cpa);
748 #ifdef IOTRACE
749 dumpit((char *)irb,sizeof(struct irb));
750 dumpit((char *)(unsigned long)irb->scsw.cpa,
751 sizeof(struct ccw1));
752 #endif
753 #ifdef FUNCTRACE
754 printk(KERN_INFO "%s:%s Exit on line %d\n",
755 dev->name,__FUNCTION__,__LINE__);
756 #endif
757 CLAW_DBF_TEXT(2,trace,"chanchk");
758 /* return; */
759 }
760
761 /* Check the reason-code of a unit check */
762 if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
763 ccw_check_unit_check(p_ch, irb->ecw[0]);
764 }
765
766 /* State machine to bring the connection up, down and to restart */
767 p_ch->last_dstat = irb->scsw.dstat;
768
769 switch (p_ch->claw_state) {
770 case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
771 #ifdef DEBUGMSG
772 printk(KERN_INFO "%s: CLAW_STOP enter\n", dev->name);
773 #endif
774 if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
775 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
776 (p_ch->irb->scsw.stctl ==
777 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
778 #ifdef FUNCTRACE
779 printk(KERN_INFO "%s:%s Exit on line %d\n",
780 dev->name,__FUNCTION__,__LINE__);
781 #endif
782 return;
783 }
784 wake_up(&p_ch->wait); /* wake up claw_release */
785
786 #ifdef DEBUGMSG
787 printk(KERN_INFO "%s: CLAW_STOP exit\n", dev->name);
788 #endif
789 #ifdef FUNCTRACE
790 printk(KERN_INFO "%s:%s Exit on line %d\n",
791 dev->name,__FUNCTION__,__LINE__);
792 #endif
793 CLAW_DBF_TEXT(4,trace,"stop");
794 return;
795
796 case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open */
797 #ifdef DEBUGMSG
798 printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO\n",
799 dev->name);
800 #endif
801 if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
802 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
803 (p_ch->irb->scsw.stctl ==
804 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
805 #ifdef FUNCTRACE
806 printk(KERN_INFO "%s:%s Exit on line %d\n",
807 dev->name,__FUNCTION__,__LINE__);
808 #endif
809 CLAW_DBF_TEXT(4,trace,"haltio");
810 return;
811 }
812 if (p_ch->flag == CLAW_READ) {
813 p_ch->claw_state = CLAW_START_READ;
814 wake_up(&p_ch->wait); /* wake claw_open (READ)*/
815 }
816 else
817 if (p_ch->flag == CLAW_WRITE) {
818 p_ch->claw_state = CLAW_START_WRITE;
819 /* send SYSTEM_VALIDATE */
820 claw_strt_read(dev, LOCK_NO);
821 claw_send_control(dev,
822 SYSTEM_VALIDATE_REQUEST,
823 0, 0, 0,
824 p_env->host_name,
825 p_env->adapter_name );
826 } else {
827 printk(KERN_WARNING "claw: unsolicited "
828 "interrupt for device:"
829 "%s received c-%02x d-%02x\n",
830 cdev->dev.bus_id,
831 irb->scsw.cstat,
832 irb->scsw.dstat);
833 return;
834 }
835 #ifdef DEBUGMSG
836 printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO exit\n",
837 dev->name);
838 #endif
839 #ifdef FUNCTRACE
840 printk(KERN_INFO "%s:%s Exit on line %d\n",
841 dev->name,__FUNCTION__,__LINE__);
842 #endif
843 CLAW_DBF_TEXT(4,trace,"haltio");
844 return;
845 case CLAW_START_READ:
846 CLAW_DBF_TEXT(4,trace,"ReadIRQ");
847 if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
848 clear_bit(0, (void *)&p_ch->IO_active);
849 if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
850 (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
851 (p_ch->irb->ecw[0]) == 0)
852 {
853 privptr->stats.rx_errors++;
854 printk(KERN_INFO "%s: Restart is "
855 "required after remote "
856 "side recovers \n",
857 dev->name);
858 }
859 #ifdef FUNCTRACE
860 printk(KERN_INFO "%s:%s Exit on line %d\n",
861 dev->name,__FUNCTION__,__LINE__);
862 #endif
863 CLAW_DBF_TEXT(4,trace,"notrdy");
864 return;
865 }
866 if ((p_ch->irb->scsw.cstat & SCHN_STAT_PCI) &&
867 (p_ch->irb->scsw.dstat==0)) {
868 if (test_and_set_bit(CLAW_BH_ACTIVE,
869 (void *)&p_ch->flag_a) == 0) {
870 tasklet_schedule(&p_ch->tasklet);
871 }
872 else {
873 CLAW_DBF_TEXT(4,trace,"PCINoBH");
874 }
875 #ifdef FUNCTRACE
876 printk(KERN_INFO "%s:%s Exit on line %d\n",
877 dev->name,__FUNCTION__,__LINE__);
878 #endif
879 CLAW_DBF_TEXT(4,trace,"PCI_read");
880 return;
881 }
882 if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
883 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
884 (p_ch->irb->scsw.stctl ==
885 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
886 #ifdef FUNCTRACE
887 printk(KERN_INFO "%s:%s Exit on line %d\n",
888 dev->name,__FUNCTION__,__LINE__);
889 #endif
890 CLAW_DBF_TEXT(4,trace,"SPend_rd");
891 return;
892 }
893 clear_bit(0, (void *)&p_ch->IO_active);
894 claw_clearbit_busy(TB_RETRY,dev);
895 if (test_and_set_bit(CLAW_BH_ACTIVE,
896 (void *)&p_ch->flag_a) == 0) {
897 tasklet_schedule(&p_ch->tasklet);
898 }
899 else {
900 CLAW_DBF_TEXT(4,trace,"RdBHAct");
901 }
902
903 #ifdef DEBUGMSG
904 printk(KERN_INFO "%s: process CLAW_START_READ exit\n",
905 dev->name);
906 #endif
907 #ifdef FUNCTRACE
908 printk(KERN_INFO "%s:%s Exit on line %d\n",
909 dev->name,__FUNCTION__,__LINE__);
910 #endif
911 CLAW_DBF_TEXT(4,trace,"RdIRQXit");
912 return;
913 case CLAW_START_WRITE:
914 if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
915 printk(KERN_INFO "%s: Unit Check Occured in "
916 "write channel\n",dev->name);
917 clear_bit(0, (void *)&p_ch->IO_active);
918 if (p_ch->irb->ecw[0] & 0x80 ) {
919 printk(KERN_INFO "%s: Resetting Event "
920 "occurred:\n",dev->name);
921 init_timer(&p_ch->timer);
922 p_ch->timer.function =
923 (void *)claw_write_retry;
924 p_ch->timer.data = (unsigned long)p_ch;
925 p_ch->timer.expires = jiffies + 10*HZ;
926 add_timer(&p_ch->timer);
927 printk(KERN_INFO "%s: write connection "
928 "restarting\n",dev->name);
929 }
930 #ifdef FUNCTRACE
931 printk(KERN_INFO "%s:%s Exit on line %d\n",
932 dev->name,__FUNCTION__,__LINE__);
933 #endif
934 CLAW_DBF_TEXT(4,trace,"rstrtwrt");
935 return;
936 }
937 if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) {
938 clear_bit(0, (void *)&p_ch->IO_active);
939 printk(KERN_INFO "%s: Unit Exception "
940 "Occured in write channel\n",
941 dev->name);
942 }
943 if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
944 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
945 (p_ch->irb->scsw.stctl ==
946 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
947 #ifdef FUNCTRACE
948 printk(KERN_INFO "%s:%s Exit on line %d\n",
949 dev->name,__FUNCTION__,__LINE__);
950 #endif
951 CLAW_DBF_TEXT(4,trace,"writeUE");
952 return;
953 }
954 clear_bit(0, (void *)&p_ch->IO_active);
955 if (claw_test_and_setbit_busy(TB_TX,dev)==0) {
956 claw_write_next(p_ch);
957 claw_clearbit_busy(TB_TX,dev);
958 claw_clear_busy(dev);
959 }
960 p_ch_r=(struct chbk *)&privptr->channel[READ];
961 if (test_and_set_bit(CLAW_BH_ACTIVE,
962 (void *)&p_ch_r->flag_a) == 0) {
963 tasklet_schedule(&p_ch_r->tasklet);
964 }
965
966 #ifdef DEBUGMSG
967 printk(KERN_INFO "%s: process CLAW_START_WRITE exit\n",
968 dev->name);
969 #endif
970 #ifdef FUNCTRACE
971 printk(KERN_INFO "%s:%s Exit on line %d\n",
972 dev->name,__FUNCTION__,__LINE__);
973 #endif
974 CLAW_DBF_TEXT(4,trace,"StWtExit");
975 return;
976 default:
977 printk(KERN_WARNING "%s: wrong selection code - irq "
978 "state=%d\n",dev->name,p_ch->claw_state);
979 #ifdef FUNCTRACE
980 printk(KERN_INFO "%s:%s Exit on line %d\n",
981 dev->name,__FUNCTION__,__LINE__);
982 #endif
983 CLAW_DBF_TEXT(2,trace,"badIRQ");
984 return;
985 }
986
987 } /* end of claw_irq_handler */
988
989
990 /*-------------------------------------------------------------------*
991 * claw_irq_tasklet *
992 * *
993 *--------------------------------------------------------------------*/
994 static void
995 claw_irq_tasklet ( unsigned long data )
996 {
997 struct chbk * p_ch;
998 struct net_device *dev;
999 struct claw_privbk * privptr;
1000
1001 p_ch = (struct chbk *) data;
1002 dev = (struct net_device *)p_ch->ndev;
1003 #ifdef FUNCTRACE
1004 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
1005 #endif
1006 #ifdef DEBUGMSG
1007 printk(KERN_INFO "%s: variable p_ch =\n",dev->name);
1008 dumpit((char *) p_ch, sizeof(struct chbk));
1009 #endif
1010 CLAW_DBF_TEXT(4,trace,"IRQtask");
1011
1012 privptr = (struct claw_privbk *) dev->priv;
1013
1014 #ifdef DEBUGMSG
1015 printk(KERN_INFO "%s: bh routine - state-%02x\n" ,
1016 dev->name, p_ch->claw_state);
1017 #endif
1018
1019 unpack_read(dev);
1020 clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
1021 CLAW_DBF_TEXT(4,trace,"TskletXt");
1022 #ifdef FUNCTRACE
1023 printk(KERN_INFO "%s:%s Exit on line %d\n",
1024 dev->name,__FUNCTION__,__LINE__);
1025 #endif
1026 return;
1027 } /* end of claw_irq_bh */
1028
1029 /*-------------------------------------------------------------------*
1030 * claw_release *
1031 * *
1032 *--------------------------------------------------------------------*/
1033 static int
1034 claw_release(struct net_device *dev)
1035 {
1036 int rc;
1037 int i;
1038 unsigned long saveflags;
1039 unsigned long parm;
1040 struct claw_privbk *privptr;
1041 DECLARE_WAITQUEUE(wait, current);
1042 struct ccwbk* p_this_ccw;
1043 struct ccwbk* p_buf;
1044
1045 if (!dev)
1046 return 0;
1047 privptr = (struct claw_privbk *) dev->priv;
1048 if (!privptr)
1049 return 0;
1050 #ifdef FUNCTRACE
1051 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
1052 #endif
1053 CLAW_DBF_TEXT(4,trace,"release");
1054 #ifdef DEBUGMSG
1055 printk(KERN_INFO "%s: variable dev =\n",dev->name);
1056 dumpit((char *) dev, sizeof(struct net_device));
1057 printk(KERN_INFO "Priv Buffalloc %d\n",privptr->buffs_alloc);
1058 printk(KERN_INFO "Priv p_buff_ccw = %p\n",&privptr->p_buff_ccw);
1059 #endif
1060 privptr->release_pend=1;
1061 claw_setbit_busy(TB_STOP,dev);
1062 for ( i = 1; i >=0 ; i--) {
1063 spin_lock_irqsave(
1064 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
1065 /* del_timer(&privptr->channel[READ].timer); */
1066 privptr->channel[i].claw_state = CLAW_STOP;
1067 privptr->channel[i].IO_active = 0;
1068 parm = (unsigned long) &privptr->channel[i];
1069 if (i == WRITE)
1070 claw_purge_skb_queue(
1071 &privptr->channel[WRITE].collect_queue);
1072 rc = ccw_device_halt (privptr->channel[i].cdev, parm);
1073 if (privptr->system_validate_comp==0x00) /* never opened? */
1074 init_waitqueue_head(&privptr->channel[i].wait);
1075 add_wait_queue(&privptr->channel[i].wait, &wait);
1076 set_current_state(TASK_INTERRUPTIBLE);
1077 spin_unlock_irqrestore(
1078 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
1079 schedule();
1080 set_current_state(TASK_RUNNING);
1081 remove_wait_queue(&privptr->channel[i].wait, &wait);
1082 if (rc != 0) {
1083 ccw_check_return_code(privptr->channel[i].cdev, rc);
1084 }
1085 }
1086 if (privptr->pk_skb != NULL) {
1087 dev_kfree_skb_any(privptr->pk_skb);
1088 privptr->pk_skb = NULL;
1089 }
1090 if(privptr->buffs_alloc != 1) {
1091 #ifdef FUNCTRACE
1092 printk(KERN_INFO "%s:%s Exit on line %d\n",
1093 dev->name,__FUNCTION__,__LINE__);
1094 #endif
1095 CLAW_DBF_TEXT(4,trace,"none2fre");
1096 return 0;
1097 }
1098 CLAW_DBF_TEXT(4,trace,"freebufs");
1099 if (privptr->p_buff_ccw != NULL) {
1100 free_pages((unsigned long)privptr->p_buff_ccw,
1101 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
1102 }
1103 CLAW_DBF_TEXT(4,trace,"freeread");
1104 if (privptr->p_env->read_size < PAGE_SIZE) {
1105 if (privptr->p_buff_read != NULL) {
1106 free_pages((unsigned long)privptr->p_buff_read,
1107 (int)pages_to_order_of_mag(privptr->p_buff_read_num));
1108 }
1109 }
1110 else {
1111 p_buf=privptr->p_read_active_first;
1112 while (p_buf!=NULL) {
1113 free_pages((unsigned long)p_buf->p_buffer,
1114 (int)pages_to_order_of_mag(
1115 privptr->p_buff_pages_perread ));
1116 p_buf=p_buf->next;
1117 }
1118 }
1119 CLAW_DBF_TEXT(4,trace,"freewrit");
1120 if (privptr->p_env->write_size < PAGE_SIZE ) {
1121 free_pages((unsigned long)privptr->p_buff_write,
1122 (int)pages_to_order_of_mag(privptr->p_buff_write_num));
1123 }
1124 else {
1125 p_buf=privptr->p_write_active_first;
1126 while (p_buf!=NULL) {
1127 free_pages((unsigned long)p_buf->p_buffer,
1128 (int)pages_to_order_of_mag(
1129 privptr->p_buff_pages_perwrite ));
1130 p_buf=p_buf->next;
1131 }
1132 }
1133 CLAW_DBF_TEXT(4,trace,"clearptr");
1134 privptr->buffs_alloc = 0;
1135 privptr->p_buff_ccw=NULL;
1136 privptr->p_buff_read=NULL;
1137 privptr->p_buff_write=NULL;
1138 privptr->system_validate_comp=0;
1139 privptr->release_pend=0;
1140 /* Remove any writes that were pending and reset all reads */
1141 p_this_ccw=privptr->p_read_active_first;
1142 while (p_this_ccw!=NULL) {
1143 p_this_ccw->header.length=0xffff;
1144 p_this_ccw->header.opcode=0xff;
1145 p_this_ccw->header.flag=0x00;
1146 p_this_ccw=p_this_ccw->next;
1147 }
1148
1149 while (privptr->p_write_active_first!=NULL) {
1150 p_this_ccw=privptr->p_write_active_first;
1151 p_this_ccw->header.flag=CLAW_PENDING;
1152 privptr->p_write_active_first=p_this_ccw->next;
1153 p_this_ccw->next=privptr->p_write_free_chain;
1154 privptr->p_write_free_chain=p_this_ccw;
1155 ++privptr->write_free_count;
1156 }
1157 privptr->p_write_active_last=NULL;
1158 privptr->mtc_logical_link = -1;
1159 privptr->mtc_skipping = 1;
1160 privptr->mtc_offset=0;
1161
1162 if (((privptr->channel[READ].last_dstat |
1163 privptr->channel[WRITE].last_dstat) &
1164 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
1165 printk(KERN_WARNING "%s: channel problems during close - "
1166 "read: %02x - write: %02x\n",
1167 dev->name,
1168 privptr->channel[READ].last_dstat,
1169 privptr->channel[WRITE].last_dstat);
1170 CLAW_DBF_TEXT(2,trace,"badclose");
1171 }
1172 #ifdef FUNCTRACE
1173 printk(KERN_INFO "%s:%s Exit on line %d\n",
1174 dev->name,__FUNCTION__,__LINE__);
1175 #endif
1176 CLAW_DBF_TEXT(4,trace,"rlsexit");
1177 return 0;
1178 } /* end of claw_release */
1179
1180
1181
1182 /*-------------------------------------------------------------------*
1183 * claw_write_retry *
1184 * *
1185 *--------------------------------------------------------------------*/
1186
1187 static void
1188 claw_write_retry ( struct chbk *p_ch )
1189 {
1190
1191 struct net_device *dev=p_ch->ndev;
1192
1193
1194 #ifdef FUNCTRACE
1195 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
1196 printk(KERN_INFO "claw: variable p_ch =\n");
1197 dumpit((char *) p_ch, sizeof(struct chbk));
1198 #endif
1199 CLAW_DBF_TEXT(4,trace,"w_retry");
1200 if (p_ch->claw_state == CLAW_STOP) {
1201 #ifdef FUNCTRACE
1202 printk(KERN_INFO "%s:%s Exit on line %d\n",
1203 dev->name,__FUNCTION__,__LINE__);
1204 #endif
1205 return;
1206 }
1207 #ifdef DEBUGMSG
1208 printk( KERN_INFO "%s:%s state-%02x\n" ,
1209 dev->name,
1210 __FUNCTION__,
1211 p_ch->claw_state);
1212 #endif
1213 claw_strt_out_IO( dev );
1214 #ifdef FUNCTRACE
1215 printk(KERN_INFO "%s:%s Exit on line %d\n",
1216 dev->name,__FUNCTION__,__LINE__);
1217 #endif
1218 CLAW_DBF_TEXT(4,trace,"rtry_xit");
1219 return;
1220 } /* end of claw_write_retry */
1221
1222
1223 /*-------------------------------------------------------------------*
1224 * claw_write_next *
1225 * *
1226 *--------------------------------------------------------------------*/
1227
1228 static void
1229 claw_write_next ( struct chbk * p_ch )
1230 {
1231
1232 struct net_device *dev;
1233 struct claw_privbk *privptr=NULL;
1234 struct sk_buff *pk_skb;
1235 int rc;
1236
1237 #ifdef FUNCTRACE
1238 printk(KERN_INFO "%s:%s Enter \n",p_ch->ndev->name,__FUNCTION__);
1239 printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
1240 dumpit((char *) p_ch, sizeof(struct chbk));
1241 #endif
1242 CLAW_DBF_TEXT(4,trace,"claw_wrt");
1243 if (p_ch->claw_state == CLAW_STOP)
1244 return;
1245 dev = (struct net_device *) p_ch->ndev;
1246 privptr = (struct claw_privbk *) dev->priv;
1247 claw_free_wrt_buf( dev );
1248 if ((privptr->write_free_count > 0) &&
1249 !skb_queue_empty(&p_ch->collect_queue)) {
1250 pk_skb = claw_pack_skb(privptr);
1251 while (pk_skb != NULL) {
1252 rc = claw_hw_tx( pk_skb, dev,1);
1253 if (privptr->write_free_count > 0) {
1254 pk_skb = claw_pack_skb(privptr);
1255 } else
1256 pk_skb = NULL;
1257 }
1258 }
1259 if (privptr->p_write_active_first!=NULL) {
1260 claw_strt_out_IO(dev);
1261 }
1262
1263 #ifdef FUNCTRACE
1264 printk(KERN_INFO "%s:%s Exit on line %d\n",
1265 dev->name,__FUNCTION__,__LINE__);
1266 #endif
1267 return;
1268 } /* end of claw_write_next */
1269
1270 /*-------------------------------------------------------------------*
1271 * *
1272 * claw_timer *
1273 *--------------------------------------------------------------------*/
1274
1275 static void
1276 claw_timer ( struct chbk * p_ch )
1277 {
1278 #ifdef FUNCTRACE
1279 printk(KERN_INFO "%s:%s Entry\n",p_ch->ndev->name,__FUNCTION__);
1280 printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
1281 dumpit((char *) p_ch, sizeof(struct chbk));
1282 #endif
1283 CLAW_DBF_TEXT(4,trace,"timer");
1284 p_ch->flag |= CLAW_TIMER;
1285 wake_up(&p_ch->wait);
1286 #ifdef FUNCTRACE
1287 printk(KERN_INFO "%s:%s Exit on line %d\n",
1288 p_ch->ndev->name,__FUNCTION__,__LINE__);
1289 #endif
1290 return;
1291 } /* end of claw_timer */
1292
1293
1294 /*
1295 *
1296 * functions
1297 */
1298
1299
1300 /*-------------------------------------------------------------------*
1301 * *
1302 * pages_to_order_of_mag *
1303 * *
1304 * takes a number of pages from 1 to 512 and returns the *
1305 * log(num_pages)/log(2) get_free_pages() needs a base 2 order *
1306 * of magnitude get_free_pages() has an upper order of 9 *
1307 *--------------------------------------------------------------------*/
1308
1309 static int
1310 pages_to_order_of_mag(int num_of_pages)
1311 {
1312 int order_of_mag=1; /* assume 2 pages */
1313 int nump=2;
1314 #ifdef FUNCTRACE
1315 printk(KERN_INFO "%s Enter pages = %d \n",__FUNCTION__,num_of_pages);
1316 #endif
1317 CLAW_DBF_TEXT_(5,trace,"pages%d",num_of_pages);
1318 if (num_of_pages == 1) {return 0; } /* magnitude of 0 = 1 page */
1319 /* 512 pages = 2Meg on 4k page systems */
1320 if (num_of_pages >= 512) {return 9; }
1321 /* we have two or more pages order is at least 1 */
1322 for (nump=2 ;nump <= 512;nump*=2) {
1323 if (num_of_pages <= nump)
1324 break;
1325 order_of_mag +=1;
1326 }
1327 if (order_of_mag > 9) { order_of_mag = 9; } /* I know it's paranoid */
1328 #ifdef FUNCTRACE
1329 printk(KERN_INFO "%s Exit on line %d, order = %d\n",
1330 __FUNCTION__,__LINE__, order_of_mag);
1331 #endif
1332 CLAW_DBF_TEXT_(5,trace,"mag%d",order_of_mag);
1333 return order_of_mag;
1334 }
1335
1336 /*-------------------------------------------------------------------*
1337 * *
1338 * add_claw_reads *
1339 * *
1340 *--------------------------------------------------------------------*/
1341 static int
1342 add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
1343 struct ccwbk* p_last)
1344 {
1345 struct claw_privbk *privptr;
1346 struct ccw1 temp_ccw;
1347 struct endccw * p_end;
1348 #ifdef IOTRACE
1349 struct ccwbk* p_buf;
1350 #endif
1351 #ifdef FUNCTRACE
1352 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
1353 #endif
1354 #ifdef DEBUGMSG
1355 printk(KERN_INFO "dev\n");
1356 dumpit((char *) dev, sizeof(struct net_device));
1357 printk(KERN_INFO "p_first\n");
1358 dumpit((char *) p_first, sizeof(struct ccwbk));
1359 printk(KERN_INFO "p_last\n");
1360 dumpit((char *) p_last, sizeof(struct ccwbk));
1361 #endif
1362 CLAW_DBF_TEXT(4,trace,"addreads");
1363 privptr = dev->priv;
1364 p_end = privptr->p_end_ccw;
1365
1366 /* first CCW and last CCW contains a new set of read channel programs
1367 * to apend the running channel programs
1368 */
1369 if ( p_first==NULL) {
1370 #ifdef FUNCTRACE
1371 printk(KERN_INFO "%s:%s Exit on line %d\n",
1372 dev->name,__FUNCTION__,__LINE__);
1373 #endif
1374 CLAW_DBF_TEXT(4,trace,"addexit");
1375 return 0;
1376 }
1377
1378 /* set up ending CCW sequence for this segment */
1379 if (p_end->read1) {
1380 p_end->read1=0x00; /* second ending CCW is now active */
1381 /* reset ending CCWs and setup TIC CCWs */
1382 p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1383 p_end->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1384 p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
1385 p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
1386 p_end->read2_nop2.cda=0;
1387 p_end->read2_nop2.count=1;
1388 }
1389 else {
1390 p_end->read1=0x01; /* first ending CCW is now active */
1391 /* reset ending CCWs and setup TIC CCWs */
1392 p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1393 p_end->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1394 p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
1395 p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
1396 p_end->read1_nop2.cda=0;
1397 p_end->read1_nop2.count=1;
1398 }
1399
1400 if ( privptr-> p_read_active_first ==NULL ) {
1401 #ifdef DEBUGMSG
1402 printk(KERN_INFO "%s:%s p_read_active_first == NULL \n",
1403 dev->name,__FUNCTION__);
1404 printk(KERN_INFO "%s:%s Read active first/last changed \n",
1405 dev->name,__FUNCTION__);
1406 #endif
1407 privptr-> p_read_active_first= p_first; /* set new first */
1408 privptr-> p_read_active_last = p_last; /* set new last */
1409 }
1410 else {
1411
1412 #ifdef DEBUGMSG
1413 printk(KERN_INFO "%s:%s Read in progress \n",
1414 dev->name,__FUNCTION__);
1415 #endif
1416 /* set up TIC ccw */
1417 temp_ccw.cda= (__u32)__pa(&p_first->read);
1418 temp_ccw.count=0;
1419 temp_ccw.flags=0;
1420 temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
1421
1422
1423 if (p_end->read1) {
1424
1425 /* first set of CCW's is chained to the new read */
1426 /* chain, so the second set is chained to the active chain. */
1427 /* Therefore modify the second set to point to the new */
1428 /* read chain set up TIC CCWs */
1429 /* make sure we update the CCW so channel doesn't fetch it */
1430 /* when it's only half done */
1431 memcpy( &p_end->read2_nop2, &temp_ccw ,
1432 sizeof(struct ccw1));
1433 privptr->p_read_active_last->r_TIC_1.cda=
1434 (__u32)__pa(&p_first->read);
1435 privptr->p_read_active_last->r_TIC_2.cda=
1436 (__u32)__pa(&p_first->read);
1437 }
1438 else {
1439 /* make sure we update the CCW so channel doesn't */
1440 /* fetch it when it is only half done */
1441 memcpy( &p_end->read1_nop2, &temp_ccw ,
1442 sizeof(struct ccw1));
1443 privptr->p_read_active_last->r_TIC_1.cda=
1444 (__u32)__pa(&p_first->read);
1445 privptr->p_read_active_last->r_TIC_2.cda=
1446 (__u32)__pa(&p_first->read);
1447 }
1448 /* chain in new set of blocks */
1449 privptr->p_read_active_last->next = p_first;
1450 privptr->p_read_active_last=p_last;
1451 } /* end of if ( privptr-> p_read_active_first ==NULL) */
1452 #ifdef IOTRACE
1453 printk(KERN_INFO "%s:%s dump p_last CCW BK \n",dev->name,__FUNCTION__);
1454 dumpit((char *)p_last, sizeof(struct ccwbk));
1455 printk(KERN_INFO "%s:%s dump p_end CCW BK \n",dev->name,__FUNCTION__);
1456 dumpit((char *)p_end, sizeof(struct endccw));
1457
1458 printk(KERN_INFO "%s:%s dump p_first CCW BK \n",dev->name,__FUNCTION__);
1459 dumpit((char *)p_first, sizeof(struct ccwbk));
1460 printk(KERN_INFO "%s:%s Dump Active CCW chain \n",
1461 dev->name,__FUNCTION__);
1462 p_buf=privptr->p_read_active_first;
1463 while (p_buf!=NULL) {
1464 dumpit((char *)p_buf, sizeof(struct ccwbk));
1465 p_buf=p_buf->next;
1466 }
1467 #endif
1468 #ifdef FUNCTRACE
1469 printk(KERN_INFO "%s:%s Exit on line %d\n",
1470 dev->name,__FUNCTION__,__LINE__);
1471 #endif
1472 CLAW_DBF_TEXT(4,trace,"addexit");
1473 return 0;
1474 } /* end of add_claw_reads */
1475
1476 /*-------------------------------------------------------------------*
1477 * ccw_check_return_code *
1478 * *
1479 *-------------------------------------------------------------------*/
1480
1481 static void
1482 ccw_check_return_code(struct ccw_device *cdev, int return_code)
1483 {
1484 #ifdef FUNCTRACE
1485 printk(KERN_INFO "%s: %s() > enter \n",
1486 cdev->dev.bus_id,__FUNCTION__);
1487 #endif
1488 CLAW_DBF_TEXT(4,trace,"ccwret");
1489 #ifdef DEBUGMSG
1490 printk(KERN_INFO "variable cdev =\n");
1491 dumpit((char *) cdev, sizeof(struct ccw_device));
1492 printk(KERN_INFO "variable return_code = %d\n",return_code);
1493 #endif
1494 if (return_code != 0) {
1495 switch (return_code) {
1496 case -EBUSY:
1497 printk(KERN_INFO "%s: Busy !\n",
1498 cdev->dev.bus_id);
1499 break;
1500 case -ENODEV:
1501 printk(KERN_EMERG "%s: Missing device called "
1502 "for IO ENODEV\n", cdev->dev.bus_id);
1503 break;
1504 case -EIO:
1505 printk(KERN_EMERG "%s: Status pending... EIO \n",
1506 cdev->dev.bus_id);
1507 break;
1508 case -EINVAL:
1509 printk(KERN_EMERG "%s: Invalid Dev State EINVAL \n",
1510 cdev->dev.bus_id);
1511 break;
1512 default:
1513 printk(KERN_EMERG "%s: Unknown error in "
1514 "Do_IO %d\n",cdev->dev.bus_id, return_code);
1515 }
1516 }
1517 #ifdef FUNCTRACE
1518 printk(KERN_INFO "%s: %s() > exit on line %d\n",
1519 cdev->dev.bus_id,__FUNCTION__,__LINE__);
1520 #endif
1521 CLAW_DBF_TEXT(4,trace,"ccwret");
1522 } /* end of ccw_check_return_code */
1523
1524 /*-------------------------------------------------------------------*
1525 * ccw_check_unit_check *
1526 *--------------------------------------------------------------------*/
1527
1528 static void
1529 ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
1530 {
1531 struct net_device *dev = p_ch->ndev;
1532
1533 #ifdef FUNCTRACE
1534 printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
1535 #endif
1536 #ifdef DEBUGMSG
1537 printk(KERN_INFO "%s: variable dev =\n",dev->name);
1538 dumpit((char *)dev, sizeof(struct net_device));
1539 printk(KERN_INFO "%s: variable sense =\n",dev->name);
1540 dumpit((char *)&sense, 2);
1541 #endif
1542 CLAW_DBF_TEXT(4,trace,"unitchek");
1543
1544 printk(KERN_INFO "%s: Unit Check with sense byte:0x%04x\n",
1545 dev->name, sense);
1546
1547 if (sense & 0x40) {
1548 if (sense & 0x01) {
1549 printk(KERN_WARNING "%s: Interface disconnect or "
1550 "Selective reset "
1551 "occurred (remote side)\n", dev->name);
1552 }
1553 else {
1554 printk(KERN_WARNING "%s: System reset occured"
1555 " (remote side)\n", dev->name);
1556 }
1557 }
1558 else if (sense & 0x20) {
1559 if (sense & 0x04) {
1560 printk(KERN_WARNING "%s: Data-streaming "
1561 "timeout)\n", dev->name);
1562 }
1563 else {
1564 printk(KERN_WARNING "%s: Data-transfer parity"
1565 " error\n", dev->name);
1566 }
1567 }
1568 else if (sense & 0x10) {
1569 if (sense & 0x20) {
1570 printk(KERN_WARNING "%s: Hardware malfunction "
1571 "(remote side)\n", dev->name);
1572 }
1573 else {
1574 printk(KERN_WARNING "%s: read-data parity error "
1575 "(remote side)\n", dev->name);
1576 }
1577 }
1578
1579 #ifdef FUNCTRACE
1580 printk(KERN_INFO "%s: %s() exit on line %d\n",
1581 dev->name,__FUNCTION__,__LINE__);
1582 #endif
1583 } /* end of ccw_check_unit_check */
1584
1585
1586
1587 /*-------------------------------------------------------------------*
1588 * Dump buffer format *
1589 * *
1590 *--------------------------------------------------------------------*/
1591 #ifdef DEBUG
1592 static void
1593 dumpit(char* buf, int len)
1594 {
1595
1596 __u32 ct, sw, rm, dup;
1597 char *ptr, *rptr;
1598 char tbuf[82], tdup[82];
1599 #if (CONFIG_64BIT)
1600 char addr[22];
1601 #else
1602 char addr[12];
1603 #endif
1604 char boff[12];
1605 char bhex[82], duphex[82];
1606 char basc[40];
1607
1608 sw = 0;
1609 rptr =ptr=buf;
1610 rm = 16;
1611 duphex[0] = 0x00;
1612 dup = 0;
1613 for ( ct=0; ct < len; ct++, ptr++, rptr++ ) {
1614 if (sw == 0) {
1615 #if (CONFIG_64BIT)
1616 sprintf(addr, "%16.16lX",(unsigned long)rptr);
1617 #else
1618 sprintf(addr, "%8.8X",(__u32)rptr);
1619 #endif
1620 sprintf(boff, "%4.4X", (__u32)ct);
1621 bhex[0] = '\0';
1622 basc[0] = '\0';
1623 }
1624 if ((sw == 4) || (sw == 12)) {
1625 strcat(bhex, " ");
1626 }
1627 if (sw == 8) {
1628 strcat(bhex, " ");
1629 }
1630 #if (CONFIG_64BIT)
1631 sprintf(tbuf,"%2.2lX", (unsigned long)*ptr);
1632 #else
1633 sprintf(tbuf,"%2.2X", (__u32)*ptr);
1634 #endif
1635 tbuf[2] = '\0';
1636 strcat(bhex, tbuf);
1637 if ((0!=isprint(*ptr)) && (*ptr >= 0x20)) {
1638 basc[sw] = *ptr;
1639 }
1640 else {
1641 basc[sw] = '.';
1642 }
1643 basc[sw+1] = '\0';
1644 sw++;
1645 rm--;
1646 if (sw==16) {
1647 if ((strcmp(duphex, bhex)) !=0) {
1648 if (dup !=0) {
1649 sprintf(tdup,"Duplicate as above to"
1650 " %s", addr);
1651 printk( KERN_INFO " "
1652 " --- %s ---\n",tdup);
1653 }
1654 printk( KERN_INFO " %s (+%s) : %s [%s]\n",
1655 addr, boff, bhex, basc);
1656 dup = 0;
1657 strcpy(duphex, bhex);
1658 }
1659 else {
1660 dup++;
1661 }
1662 sw = 0;
1663 rm = 16;
1664 }
1665 } /* endfor */
1666
1667 if (sw != 0) {
1668 for ( ; rm > 0; rm--, sw++ ) {
1669 if ((sw==4) || (sw==12)) strcat(bhex, " ");
1670 if (sw==8) strcat(bhex, " ");
1671 strcat(bhex, " ");
1672 strcat(basc, " ");
1673 }
1674 if (dup !=0) {
1675 sprintf(tdup,"Duplicate as above to %s", addr);
1676 printk( KERN_INFO " --- %s ---\n",
1677 tdup);
1678 }
1679 printk( KERN_INFO " %s (+%s) : %s [%s]\n",
1680 addr, boff, bhex, basc);
1681 }
1682 else {
1683 if (dup >=1) {
1684 sprintf(tdup,"Duplicate as above to %s", addr);
1685 printk( KERN_INFO " --- %s ---\n",
1686 tdup);
1687 }
1688 if (dup !=0) {
1689 printk( KERN_INFO " %s (+%s) : %s [%s]\n",
1690 addr, boff, bhex, basc);
1691 }
1692 }
1693 return;
1694
1695 } /* end of dumpit */
1696 #endif
1697
1698 /*-------------------------------------------------------------------*
1699 * find_link *
1700 *--------------------------------------------------------------------*/
1701 static int
1702 find_link(struct net_device *dev, char *host_name, char *ws_name )
1703 {
1704 struct claw_privbk *privptr;
1705 struct claw_env *p_env;
1706 int rc=0;
1707
1708 #ifdef FUNCTRACE
1709 printk(KERN_INFO "%s:%s > enter \n",dev->name,__FUNCTION__);
1710 #endif
1711 CLAW_DBF_TEXT(2,setup,"findlink");
1712 #ifdef DEBUGMSG
1713 printk(KERN_INFO "%s: variable dev = \n",dev->name);
1714 dumpit((char *) dev, sizeof(struct net_device));
1715 printk(KERN_INFO "%s: variable host_name = %s\n",dev->name, host_name);
1716 printk(KERN_INFO "%s: variable ws_name = %s\n",dev->name, ws_name);
1717 #endif
1718 privptr=dev->priv;
1719 p_env=privptr->p_env;
1720 switch (p_env->packing)
1721 {
1722 case PACKING_ASK:
1723 if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
1724 (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
1725 rc = EINVAL;
1726 break;
1727 case DO_PACKED:
1728 case PACK_SEND:
1729 if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
1730 (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
1731 rc = EINVAL;
1732 break;
1733 default:
1734 if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
1735 (memcmp(p_env->api_type , ws_name, 8)!=0))
1736 rc = EINVAL;
1737 break;
1738 }
1739
1740 #ifdef FUNCTRACE
1741 printk(KERN_INFO "%s:%s Exit on line %d\n",
1742 dev->name,__FUNCTION__,__LINE__);
1743 #endif
1744 return 0;
1745 } /* end of find_link */
1746
1747 /*-------------------------------------------------------------------*
1748 * claw_hw_tx *
1749 * *
1750 * *
1751 *-------------------------------------------------------------------*/
1752
1753 static int
1754 claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
1755 {
1756 int rc=0;
1757 struct claw_privbk *privptr;
1758 struct ccwbk *p_this_ccw;
1759 struct ccwbk *p_first_ccw;
1760 struct ccwbk *p_last_ccw;
1761 __u32 numBuffers;
1762 signed long len_of_data;
1763 unsigned long bytesInThisBuffer;
1764 unsigned char *pDataAddress;
1765 struct endccw *pEnd;
1766 struct ccw1 tempCCW;
1767 struct chbk *p_ch;
1768 struct claw_env *p_env;
1769 int lock;
1770 struct clawph *pk_head;
1771 struct chbk *ch;
1772 #ifdef IOTRACE
1773 struct ccwbk *p_buf;
1774 #endif
1775 #ifdef FUNCTRACE
1776 printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
1777 #endif
1778 CLAW_DBF_TEXT(4,trace,"hw_tx");
1779 #ifdef DEBUGMSG
1780 printk(KERN_INFO "%s: variable dev skb =\n",dev->name);
1781 dumpit((char *) skb, sizeof(struct sk_buff));
1782 printk(KERN_INFO "%s: variable dev =\n",dev->name);
1783 dumpit((char *) dev, sizeof(struct net_device));
1784 printk(KERN_INFO "%s: variable linkid = %ld\n",dev->name,linkid);
1785 #endif
1786 privptr = (struct claw_privbk *) (dev->priv);
1787 p_ch=(struct chbk *)&privptr->channel[WRITE];
1788 p_env =privptr->p_env;
1789 #ifdef IOTRACE
1790 printk(KERN_INFO "%s: %s() dump sk_buff \n",dev->name,__FUNCTION__);
1791 dumpit((char *)skb ,sizeof(struct sk_buff));
1792 #endif
1793 claw_free_wrt_buf(dev); /* Clean up free chain if posible */
1794 /* scan the write queue to free any completed write packets */
1795 p_first_ccw=NULL;
1796 p_last_ccw=NULL;
1797 if ((p_env->packing >= PACK_SEND) &&
1798 (skb->cb[1] != 'P')) {
1799 skb_push(skb,sizeof(struct clawph));
1800 pk_head=(struct clawph *)skb->data;
1801 pk_head->len=skb->len-sizeof(struct clawph);
1802 if (pk_head->len%4) {
1803 pk_head->len+= 4-(pk_head->len%4);
1804 skb_pad(skb,4-(pk_head->len%4));
1805 skb_put(skb,4-(pk_head->len%4));
1806 }
1807 if (p_env->packing == DO_PACKED)
1808 pk_head->link_num = linkid;
1809 else
1810 pk_head->link_num = 0;
1811 pk_head->flag = 0x00;
1812 skb_pad(skb,4);
1813 skb->cb[1] = 'P';
1814 }
1815 if (linkid == 0) {
1816 if (claw_check_busy(dev)) {
1817 if (privptr->write_free_count!=0) {
1818 claw_clear_busy(dev);
1819 }
1820 else {
1821 claw_strt_out_IO(dev );
1822 claw_free_wrt_buf( dev );
1823 if (privptr->write_free_count==0) {
1824 #ifdef IOTRACE
1825 printk(KERN_INFO "%s: "
1826 "(claw_check_busy) no free write "
1827 "buffers\n", dev->name);
1828 #endif
1829 ch = &privptr->channel[WRITE];
1830 atomic_inc(&skb->users);
1831 skb_queue_tail(&ch->collect_queue, skb);
1832 goto Done;
1833 }
1834 else {
1835 claw_clear_busy(dev);
1836 }
1837 }
1838 }
1839 /* tx lock */
1840 if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
1841 #ifdef DEBUGMSG
1842 printk(KERN_INFO "%s: busy (claw_test_and_setbit_"
1843 "busy)\n", dev->name);
1844 #endif
1845 ch = &privptr->channel[WRITE];
1846 atomic_inc(&skb->users);
1847 skb_queue_tail(&ch->collect_queue, skb);
1848 claw_strt_out_IO(dev );
1849 rc=-EBUSY;
1850 goto Done2;
1851 }
1852 }
1853 /* See how many write buffers are required to hold this data */
1854 numBuffers= ( skb->len + privptr->p_env->write_size - 1) /
1855 ( privptr->p_env->write_size);
1856
1857 /* If that number of buffers isn't available, give up for now */
1858 if (privptr->write_free_count < numBuffers ||
1859 privptr->p_write_free_chain == NULL ) {
1860
1861 claw_setbit_busy(TB_NOBUFFER,dev);
1862
1863 #ifdef DEBUGMSG
1864 printk(KERN_INFO "%s: busy (claw_setbit_busy"
1865 "(TB_NOBUFFER))\n", dev->name);
1866 printk(KERN_INFO " free_count: %d, numBuffers : %d\n",
1867 (int)privptr->write_free_count,(int) numBuffers );
1868 #endif
1869 ch = &privptr->channel[WRITE];
1870 atomic_inc(&skb->users);
1871 skb_queue_tail(&ch->collect_queue, skb);
1872 CLAW_DBF_TEXT(2,trace,"clawbusy");
1873 goto Done2;
1874 }
1875 pDataAddress=skb->data;
1876 len_of_data=skb->len;
1877
1878 while (len_of_data > 0) {
1879 #ifdef DEBUGMSG
1880 printk(KERN_INFO "%s: %s() length-of-data is %ld \n",
1881 dev->name ,__FUNCTION__,len_of_data);
1882 dumpit((char *)pDataAddress ,64);
1883 #endif
1884 p_this_ccw=privptr->p_write_free_chain; /* get a block */
1885 if (p_this_ccw == NULL) { /* lost the race */
1886 ch = &privptr->channel[WRITE];
1887 atomic_inc(&skb->users);
1888 skb_queue_tail(&ch->collect_queue, skb);
1889 goto Done2;
1890 }
1891 privptr->p_write_free_chain=p_this_ccw->next;
1892 p_this_ccw->next=NULL;
1893 --privptr->write_free_count; /* -1 */
1894 bytesInThisBuffer=len_of_data;
1895 memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
1896 len_of_data-=bytesInThisBuffer;
1897 pDataAddress+=(unsigned long)bytesInThisBuffer;
1898 /* setup write CCW */
1899 p_this_ccw->write.cmd_code = (linkid * 8) +1;
1900 if (len_of_data>0) {
1901 p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
1902 }
1903 p_this_ccw->write.count=bytesInThisBuffer;
1904 /* now add to end of this chain */
1905 if (p_first_ccw==NULL) {
1906 p_first_ccw=p_this_ccw;
1907 }
1908 if (p_last_ccw!=NULL) {
1909 p_last_ccw->next=p_this_ccw;
1910 /* set up TIC ccws */
1911 p_last_ccw->w_TIC_1.cda=
1912 (__u32)__pa(&p_this_ccw->write);
1913 }
1914 p_last_ccw=p_this_ccw; /* save new last block */
1915 #ifdef IOTRACE
1916 printk(KERN_INFO "%s: %s() > CCW and Buffer %ld bytes long \n",
1917 dev->name,__FUNCTION__,bytesInThisBuffer);
1918 dumpit((char *)p_this_ccw, sizeof(struct ccwbk));
1919 dumpit((char *)p_this_ccw->p_buffer, 64);
1920 #endif
1921 }
1922
1923 /* FirstCCW and LastCCW now contain a new set of write channel
1924 * programs to append to the running channel program
1925 */
1926
1927 if (p_first_ccw!=NULL) {
1928 /* setup ending ccw sequence for this segment */
1929 pEnd=privptr->p_end_ccw;
1930 if (pEnd->write1) {
1931 pEnd->write1=0x00; /* second end ccw is now active */
1932 /* set up Tic CCWs */
1933 p_last_ccw->w_TIC_1.cda=
1934 (__u32)__pa(&pEnd->write2_nop1);
1935 pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1936 pEnd->write2_nop2.flags =
1937 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1938 pEnd->write2_nop2.cda=0;
1939 pEnd->write2_nop2.count=1;
1940 }
1941 else { /* end of if (pEnd->write1)*/
1942 pEnd->write1=0x01; /* first end ccw is now active */
1943 /* set up Tic CCWs */
1944 p_last_ccw->w_TIC_1.cda=
1945 (__u32)__pa(&pEnd->write1_nop1);
1946 pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1947 pEnd->write1_nop2.flags =
1948 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1949 pEnd->write1_nop2.cda=0;
1950 pEnd->write1_nop2.count=1;
1951 } /* end if if (pEnd->write1) */
1952
1953
1954 if (privptr->p_write_active_first==NULL ) {
1955 privptr->p_write_active_first=p_first_ccw;
1956 privptr->p_write_active_last=p_last_ccw;
1957 }
1958 else {
1959
1960 /* set up Tic CCWs */
1961
1962 tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
1963 tempCCW.count=0;
1964 tempCCW.flags=0;
1965 tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
1966
1967 if (pEnd->write1) {
1968
1969 /*
1970 * first set of ending CCW's is chained to the new write
1971 * chain, so the second set is chained to the active chain
1972 * Therefore modify the second set to point the new write chain.
1973 * make sure we update the CCW atomically
1974 * so channel does not fetch it when it's only half done
1975 */
1976 memcpy( &pEnd->write2_nop2, &tempCCW ,
1977 sizeof(struct ccw1));
1978 privptr->p_write_active_last->w_TIC_1.cda=
1979 (__u32)__pa(&p_first_ccw->write);
1980 }
1981 else {
1982
1983 /*make sure we update the CCW atomically
1984 *so channel does not fetch it when it's only half done
1985 */
1986 memcpy(&pEnd->write1_nop2, &tempCCW ,
1987 sizeof(struct ccw1));
1988 privptr->p_write_active_last->w_TIC_1.cda=
1989 (__u32)__pa(&p_first_ccw->write);
1990
1991 } /* end if if (pEnd->write1) */
1992
1993 privptr->p_write_active_last->next=p_first_ccw;
1994 privptr->p_write_active_last=p_last_ccw;
1995 }
1996
1997 } /* endif (p_first_ccw!=NULL) */
1998
1999
2000 #ifdef IOTRACE
2001 printk(KERN_INFO "%s: %s() > Dump Active CCW chain \n",
2002 dev->name,__FUNCTION__);
2003 p_buf=privptr->p_write_active_first;
2004 while (p_buf!=NULL) {
2005 dumpit((char *)p_buf, sizeof(struct ccwbk));
2006 p_buf=p_buf->next;
2007 }
2008 p_buf=(struct ccwbk*)privptr->p_end_ccw;
2009 dumpit((char *)p_buf, sizeof(struct endccw));
2010 #endif
2011 dev_kfree_skb_any(skb);
2012 if (linkid==0) {
2013 lock=LOCK_NO;
2014 }
2015 else {
2016 lock=LOCK_YES;
2017 }
2018 claw_strt_out_IO(dev );
2019 /* if write free count is zero , set NOBUFFER */
2020 #ifdef DEBUGMSG
2021 printk(KERN_INFO "%s: %s() > free_count is %d\n",
2022 dev->name,__FUNCTION__,
2023 (int) privptr->write_free_count );
2024 #endif
2025 if (privptr->write_free_count==0) {
2026 claw_setbit_busy(TB_NOBUFFER,dev);
2027 }
2028 Done2:
2029 claw_clearbit_busy(TB_TX,dev);
2030 Done:
2031 #ifdef FUNCTRACE
2032 printk(KERN_INFO "%s: %s() > exit on line %d, rc = %d \n",
2033 dev->name,__FUNCTION__,__LINE__, rc);
2034 #endif
2035 return(rc);
2036 } /* end of claw_hw_tx */
2037
2038 /*-------------------------------------------------------------------*
2039 * *
2040 * init_ccw_bk *
2041 * *
2042 *--------------------------------------------------------------------*/
2043
2044 static int
2045 init_ccw_bk(struct net_device *dev)
2046 {
2047
2048 __u32 ccw_blocks_required;
2049 __u32 ccw_blocks_perpage;
2050 __u32 ccw_pages_required;
2051 __u32 claw_reads_perpage=1;
2052 __u32 claw_read_pages;
2053 __u32 claw_writes_perpage=1;
2054 __u32 claw_write_pages;
2055 void *p_buff=NULL;
2056 struct ccwbk*p_free_chain;
2057 struct ccwbk*p_buf;
2058 struct ccwbk*p_last_CCWB;
2059 struct ccwbk*p_first_CCWB;
2060 struct endccw *p_endccw=NULL;
2061 addr_t real_address;
2062 struct claw_privbk *privptr=dev->priv;
2063 struct clawh *pClawH=NULL;
2064 addr_t real_TIC_address;
2065 int i,j;
2066 #ifdef FUNCTRACE
2067 printk(KERN_INFO "%s: %s() enter \n",dev->name,__FUNCTION__);
2068 #endif
2069 CLAW_DBF_TEXT(4,trace,"init_ccw");
2070 #ifdef DEBUGMSG
2071 printk(KERN_INFO "%s: variable dev =\n",dev->name);
2072 dumpit((char *) dev, sizeof(struct net_device));
2073 #endif
2074
2075 /* initialize statistics field */
2076 privptr->active_link_ID=0;
2077 /* initialize ccwbk pointers */
2078 privptr->p_write_free_chain=NULL; /* pointer to free ccw chain*/
2079 privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
2080 privptr->p_write_active_last=NULL; /* pointer to the last write ccw*/
2081 privptr->p_read_active_first=NULL; /* pointer to the first read ccw*/
2082 privptr->p_read_active_last=NULL; /* pointer to the last read ccw */
2083 privptr->p_end_ccw=NULL; /* pointer to ending ccw */
2084 privptr->p_claw_signal_blk=NULL; /* pointer to signal block */
2085 privptr->buffs_alloc = 0;
2086 memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
2087 memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
2088 /* initialize free write ccwbk counter */
2089 privptr->write_free_count=0; /* number of free bufs on write chain */
2090 p_last_CCWB = NULL;
2091 p_first_CCWB= NULL;
2092 /*
2093 * We need 1 CCW block for each read buffer, 1 for each
2094 * write buffer, plus 1 for ClawSignalBlock
2095 */
2096 ccw_blocks_required =
2097 privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
2098 #ifdef DEBUGMSG
2099 printk(KERN_INFO "%s: %s() "
2100 "ccw_blocks_required=%d\n",
2101 dev->name,__FUNCTION__,
2102 ccw_blocks_required);
2103 printk(KERN_INFO "%s: %s() "
2104 "PAGE_SIZE=0x%x\n",
2105 dev->name,__FUNCTION__,
2106 (unsigned int)PAGE_SIZE);
2107 printk(KERN_INFO "%s: %s() > "
2108 "PAGE_MASK=0x%x\n",
2109 dev->name,__FUNCTION__,
2110 (unsigned int)PAGE_MASK);
2111 #endif
2112 /*
2113 * compute number of CCW blocks that will fit in a page
2114 */
2115 ccw_blocks_perpage= PAGE_SIZE / CCWBK_SIZE;
2116 ccw_pages_required=
2117 (ccw_blocks_required+ccw_blocks_perpage -1) /
2118 ccw_blocks_perpage;
2119
2120 #ifdef DEBUGMSG
2121 printk(KERN_INFO "%s: %s() > ccw_blocks_perpage=%d\n",
2122 dev->name,__FUNCTION__,
2123 ccw_blocks_perpage);
2124 printk(KERN_INFO "%s: %s() > ccw_pages_required=%d\n",
2125 dev->name,__FUNCTION__,
2126 ccw_pages_required);
2127 #endif
2128 /*
2129 * read and write sizes are set by 2 constants in claw.h
2130 * 4k and 32k. Unpacked values other than 4k are not going to
2131 * provide good performance. With packing buffers support 32k
2132 * buffers are used.
2133 */
2134 if (privptr->p_env->read_size < PAGE_SIZE) {
2135 claw_reads_perpage= PAGE_SIZE / privptr->p_env->read_size;
2136 claw_read_pages= (privptr->p_env->read_buffers +
2137 claw_reads_perpage -1) / claw_reads_perpage;
2138 }
2139 else { /* > or equal */
2140 privptr->p_buff_pages_perread=
2141 (privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
2142 claw_read_pages=
2143 privptr->p_env->read_buffers * privptr->p_buff_pages_perread;
2144 }
2145 if (privptr->p_env->write_size < PAGE_SIZE) {
2146 claw_writes_perpage=
2147 PAGE_SIZE / privptr->p_env->write_size;
2148 claw_write_pages=
2149 (privptr->p_env->write_buffers + claw_writes_perpage -1) /
2150 claw_writes_perpage;
2151
2152 }
2153 else { /* > or equal */
2154 privptr->p_buff_pages_perwrite=
2155 (privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
2156 claw_write_pages=
2157 privptr->p_env->write_buffers * privptr->p_buff_pages_perwrite;
2158 }
2159 #ifdef DEBUGMSG
2160 if (privptr->p_env->read_size < PAGE_SIZE) {
2161 printk(KERN_INFO "%s: %s() reads_perpage=%d\n",
2162 dev->name,__FUNCTION__,
2163 claw_reads_perpage);
2164 }
2165 else {
2166 printk(KERN_INFO "%s: %s() pages_perread=%d\n",
2167 dev->name,__FUNCTION__,
2168 privptr->p_buff_pages_perread);
2169 }
2170 printk(KERN_INFO "%s: %s() read_pages=%d\n",
2171 dev->name,__FUNCTION__,
2172 claw_read_pages);
2173 if (privptr->p_env->write_size < PAGE_SIZE) {
2174 printk(KERN_INFO "%s: %s() writes_perpage=%d\n",
2175 dev->name,__FUNCTION__,
2176 claw_writes_perpage);
2177 }
2178 else {
2179 printk(KERN_INFO "%s: %s() pages_perwrite=%d\n",
2180 dev->name,__FUNCTION__,
2181 privptr->p_buff_pages_perwrite);
2182 }
2183 printk(KERN_INFO "%s: %s() write_pages=%d\n",
2184 dev->name,__FUNCTION__,
2185 claw_write_pages);
2186 #endif
2187
2188
2189 /*
2190 * allocate ccw_pages_required
2191 */
2192 if (privptr->p_buff_ccw==NULL) {
2193 privptr->p_buff_ccw=
2194 (void *)__get_free_pages(__GFP_DMA,
2195 (int)pages_to_order_of_mag(ccw_pages_required ));
2196 if (privptr->p_buff_ccw==NULL) {
2197 printk(KERN_INFO "%s: %s() "
2198 "__get_free_pages for CCWs failed : "
2199 "pages is %d\n",
2200 dev->name,__FUNCTION__,
2201 ccw_pages_required );
2202 #ifdef FUNCTRACE
2203 printk(KERN_INFO "%s: %s() > "
2204 "exit on line %d, rc = ENOMEM\n",
2205 dev->name,__FUNCTION__,
2206 __LINE__);
2207 #endif
2208 return -ENOMEM;
2209 }
2210 privptr->p_buff_ccw_num=ccw_pages_required;
2211 }
2212 memset(privptr->p_buff_ccw, 0x00,
2213 privptr->p_buff_ccw_num * PAGE_SIZE);
2214
2215 /*
2216 * obtain ending ccw block address
2217 *
2218 */
2219 privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
2220 real_address = (__u32)__pa(privptr->p_end_ccw);
2221 /* Initialize ending CCW block */
2222 #ifdef DEBUGMSG
2223 printk(KERN_INFO "%s: %s() begin initialize ending CCW blocks\n",
2224 dev->name,__FUNCTION__);
2225 #endif
2226
2227 p_endccw=privptr->p_end_ccw;
2228 p_endccw->real=real_address;
2229 p_endccw->write1=0x00;
2230 p_endccw->read1=0x00;
2231
2232 /* write1_nop1 */
2233 p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2234 p_endccw->write1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2235 p_endccw->write1_nop1.count = 1;
2236 p_endccw->write1_nop1.cda = 0;
2237
2238 /* write1_nop2 */
2239 p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2240 p_endccw->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2241 p_endccw->write1_nop2.count = 1;
2242 p_endccw->write1_nop2.cda = 0;
2243
2244 /* write2_nop1 */
2245 p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2246 p_endccw->write2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2247 p_endccw->write2_nop1.count = 1;
2248 p_endccw->write2_nop1.cda = 0;
2249
2250 /* write2_nop2 */
2251 p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2252 p_endccw->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2253 p_endccw->write2_nop2.count = 1;
2254 p_endccw->write2_nop2.cda = 0;
2255
2256 /* read1_nop1 */
2257 p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2258 p_endccw->read1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2259 p_endccw->read1_nop1.count = 1;
2260 p_endccw->read1_nop1.cda = 0;
2261
2262 /* read1_nop2 */
2263 p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2264 p_endccw->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2265 p_endccw->read1_nop2.count = 1;
2266 p_endccw->read1_nop2.cda = 0;
2267
2268 /* read2_nop1 */
2269 p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2270 p_endccw->read2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2271 p_endccw->read2_nop1.count = 1;
2272 p_endccw->read2_nop1.cda = 0;
2273
2274 /* read2_nop2 */
2275 p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2276 p_endccw->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2277 p_endccw->read2_nop2.count = 1;
2278 p_endccw->read2_nop2.cda = 0;
2279
2280 #ifdef IOTRACE
2281 printk(KERN_INFO "%s: %s() dump claw ending CCW BK \n",
2282 dev->name,__FUNCTION__);
2283 dumpit((char *)p_endccw, sizeof(struct endccw));
2284 #endif
2285
2286 /*
2287 * Build a chain of CCWs
2288 *
2289 */
2290
2291 #ifdef DEBUGMSG
2292 printk(KERN_INFO "%s: %s() Begin build a chain of CCW buffer \n",
2293 dev->name,__FUNCTION__);
2294 #endif
2295 p_buff=privptr->p_buff_ccw;
2296
2297 p_free_chain=NULL;
2298 for (i=0 ; i < ccw_pages_required; i++ ) {
2299 real_address = (__u32)__pa(p_buff);
2300 p_buf=p_buff;
2301 for (j=0 ; j < ccw_blocks_perpage ; j++) {
2302 p_buf->next = p_free_chain;
2303 p_free_chain = p_buf;
2304 p_buf->real=(__u32)__pa(p_buf);
2305 ++p_buf;
2306 }
2307 p_buff+=PAGE_SIZE;
2308 }
2309 #ifdef DEBUGMSG
2310 printk(KERN_INFO "%s: %s() "
2311 "End build a chain of CCW buffer \n",
2312 dev->name,__FUNCTION__);
2313 p_buf=p_free_chain;
2314 while (p_buf!=NULL) {
2315 dumpit((char *)p_buf, sizeof(struct ccwbk));
2316 p_buf=p_buf->next;
2317 }
2318 #endif
2319
2320 /*
2321 * Initialize ClawSignalBlock
2322 *
2323 */
2324 #ifdef DEBUGMSG
2325 printk(KERN_INFO "%s: %s() "
2326 "Begin initialize ClawSignalBlock \n",
2327 dev->name,__FUNCTION__);
2328 #endif
2329 if (privptr->p_claw_signal_blk==NULL) {
2330 privptr->p_claw_signal_blk=p_free_chain;
2331 p_free_chain=p_free_chain->next;
2332 pClawH=(struct clawh *)privptr->p_claw_signal_blk;
2333 pClawH->length=0xffff;
2334 pClawH->opcode=0xff;
2335 pClawH->flag=CLAW_BUSY;
2336 }
2337 #ifdef DEBUGMSG
2338 printk(KERN_INFO "%s: %s() > End initialize "
2339 "ClawSignalBlock\n",
2340 dev->name,__FUNCTION__);
2341 dumpit((char *)privptr->p_claw_signal_blk, sizeof(struct ccwbk));
2342 #endif
2343
2344 /*
2345 * allocate write_pages_required and add to free chain
2346 */
2347 if (privptr->p_buff_write==NULL) {
2348 if (privptr->p_env->write_size < PAGE_SIZE) {
2349 privptr->p_buff_write=
2350 (void *)__get_free_pages(__GFP_DMA,
2351 (int)pages_to_order_of_mag(claw_write_pages ));
2352 if (privptr->p_buff_write==NULL) {
2353 printk(KERN_INFO "%s: %s() __get_free_pages for write"
2354 " bufs failed : get is for %d pages\n",
2355 dev->name,__FUNCTION__,claw_write_pages );
2356 free_pages((unsigned long)privptr->p_buff_ccw,
2357 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
2358 privptr->p_buff_ccw=NULL;
2359 #ifdef FUNCTRACE
2360 printk(KERN_INFO "%s: %s() > exit on line %d,"
2361 "rc = ENOMEM\n",
2362 dev->name,__FUNCTION__,__LINE__);
2363 #endif
2364 return -ENOMEM;
2365 }
2366 /*
2367 * Build CLAW write free chain
2368 *
2369 */
2370
2371 memset(privptr->p_buff_write, 0x00,
2372 ccw_pages_required * PAGE_SIZE);
2373 #ifdef DEBUGMSG
2374 printk(KERN_INFO "%s: %s() Begin build claw write free "
2375 "chain \n",dev->name,__FUNCTION__);
2376 #endif
2377 privptr->p_write_free_chain=NULL;
2378
2379 p_buff=privptr->p_buff_write;
2380
2381 for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
2382 p_buf = p_free_chain; /* get a CCW */
2383 p_free_chain = p_buf->next;
2384 p_buf->next =privptr->p_write_free_chain;
2385 privptr->p_write_free_chain = p_buf;
2386 p_buf-> p_buffer = (struct clawbuf *)p_buff;
2387 p_buf-> write.cda = (__u32)__pa(p_buff);
2388 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2389 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2390 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2391 p_buf-> w_read_FF.count = 1;
2392 p_buf-> w_read_FF.cda =
2393 (__u32)__pa(&p_buf-> header.flag);
2394 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2395 p_buf-> w_TIC_1.flags = 0;
2396 p_buf-> w_TIC_1.count = 0;
2397
2398 if (((unsigned long)p_buff+privptr->p_env->write_size) >=
2399 ((unsigned long)(p_buff+2*
2400 (privptr->p_env->write_size) -1) & PAGE_MASK)) {
2401 p_buff= p_buff+privptr->p_env->write_size;
2402 }
2403 }
2404 }
2405 else /* Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
2406 {
2407 privptr->p_write_free_chain=NULL;
2408 for (i = 0; i< privptr->p_env->write_buffers ; i++) {
2409 p_buff=(void *)__get_free_pages(__GFP_DMA,
2410 (int)pages_to_order_of_mag(
2411 privptr->p_buff_pages_perwrite) );
2412 #ifdef IOTRACE
2413 printk(KERN_INFO "%s:%s __get_free_pages "
2414 "for writes buf: get for %d pages\n",
2415 dev->name,__FUNCTION__,
2416 privptr->p_buff_pages_perwrite);
2417 #endif
2418 if (p_buff==NULL) {
2419 printk(KERN_INFO "%s:%s __get_free_pages"
2420 "for writes buf failed : get is for %d pages\n",
2421 dev->name,
2422 __FUNCTION__,
2423 privptr->p_buff_pages_perwrite );
2424 free_pages((unsigned long)privptr->p_buff_ccw,
2425 (int)pages_to_order_of_mag(
2426 privptr->p_buff_ccw_num));
2427 privptr->p_buff_ccw=NULL;
2428 p_buf=privptr->p_buff_write;
2429 while (p_buf!=NULL) {
2430 free_pages((unsigned long)
2431 p_buf->p_buffer,
2432 (int)pages_to_order_of_mag(
2433 privptr->p_buff_pages_perwrite));
2434 p_buf=p_buf->next;
2435 }
2436 #ifdef FUNCTRACE
2437 printk(KERN_INFO "%s: %s exit on line %d, rc = ENOMEM\n",
2438 dev->name,
2439 __FUNCTION__,
2440 __LINE__);
2441 #endif
2442 return -ENOMEM;
2443 } /* Error on get_pages */
2444 memset(p_buff, 0x00, privptr->p_env->write_size );
2445 p_buf = p_free_chain;
2446 p_free_chain = p_buf->next;
2447 p_buf->next = privptr->p_write_free_chain;
2448 privptr->p_write_free_chain = p_buf;
2449 privptr->p_buff_write = p_buf;
2450 p_buf->p_buffer=(struct clawbuf *)p_buff;
2451 p_buf-> write.cda = (__u32)__pa(p_buff);
2452 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2453 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2454 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2455 p_buf-> w_read_FF.count = 1;
2456 p_buf-> w_read_FF.cda =
2457 (__u32)__pa(&p_buf-> header.flag);
2458 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2459 p_buf-> w_TIC_1.flags = 0;
2460 p_buf-> w_TIC_1.count = 0;
2461 } /* for all write_buffers */
2462
2463 } /* else buffers are PAGE_SIZE or bigger */
2464
2465 }
2466 privptr->p_buff_write_num=claw_write_pages;
2467 privptr->write_free_count=privptr->p_env->write_buffers;
2468
2469
2470 #ifdef DEBUGMSG
2471 printk(KERN_INFO "%s:%s End build claw write free chain \n",
2472 dev->name,__FUNCTION__);
2473 p_buf=privptr->p_write_free_chain;
2474 while (p_buf!=NULL) {
2475 dumpit((char *)p_buf, sizeof(struct ccwbk));
2476 p_buf=p_buf->next;
2477 }
2478 #endif
2479 /*
2480 * allocate read_pages_required and chain to free chain
2481 */
2482 if (privptr->p_buff_read==NULL) {
2483 if (privptr->p_env->read_size < PAGE_SIZE) {
2484 privptr->p_buff_read=
2485 (void *)__get_free_pages(__GFP_DMA,
2486 (int)pages_to_order_of_mag(claw_read_pages) );
2487 if (privptr->p_buff_read==NULL) {
2488 printk(KERN_INFO "%s: %s() "
2489 "__get_free_pages for read buf failed : "
2490 "get is for %d pages\n",
2491 dev->name,__FUNCTION__,claw_read_pages );
2492 free_pages((unsigned long)privptr->p_buff_ccw,
2493 (int)pages_to_order_of_mag(
2494 privptr->p_buff_ccw_num));
2495 /* free the write pages size is < page size */
2496 free_pages((unsigned long)privptr->p_buff_write,
2497 (int)pages_to_order_of_mag(
2498 privptr->p_buff_write_num));
2499 privptr->p_buff_ccw=NULL;
2500 privptr->p_buff_write=NULL;
2501 #ifdef FUNCTRACE
2502 printk(KERN_INFO "%s: %s() > exit on line %d, rc ="
2503 " ENOMEM\n",dev->name,__FUNCTION__,__LINE__);
2504 #endif
2505 return -ENOMEM;
2506 }
2507 memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
2508 privptr->p_buff_read_num=claw_read_pages;
2509 /*
2510 * Build CLAW read free chain
2511 *
2512 */
2513 #ifdef DEBUGMSG
2514 printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
2515 dev->name,__FUNCTION__);
2516 #endif
2517 p_buff=privptr->p_buff_read;
2518 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
2519 p_buf = p_free_chain;
2520 p_free_chain = p_buf->next;
2521
2522 if (p_last_CCWB==NULL) {
2523 p_buf->next=NULL;
2524 real_TIC_address=0;
2525 p_last_CCWB=p_buf;
2526 }
2527 else {
2528 p_buf->next=p_first_CCWB;
2529 real_TIC_address=
2530 (__u32)__pa(&p_first_CCWB -> read );
2531 }
2532
2533 p_first_CCWB=p_buf;
2534
2535 p_buf->p_buffer=(struct clawbuf *)p_buff;
2536 /* initialize read command */
2537 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
2538 p_buf-> read.cda = (__u32)__pa(p_buff);
2539 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2540 p_buf-> read.count = privptr->p_env->read_size;
2541
2542 /* initialize read_h command */
2543 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
2544 p_buf-> read_h.cda =
2545 (__u32)__pa(&(p_buf->header));
2546 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2547 p_buf-> read_h.count = sizeof(struct clawh);
2548
2549 /* initialize Signal command */
2550 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
2551 p_buf-> signal.cda =
2552 (__u32)__pa(&(pClawH->flag));
2553 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2554 p_buf-> signal.count = 1;
2555
2556 /* initialize r_TIC_1 command */
2557 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2558 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
2559 p_buf-> r_TIC_1.flags = 0;
2560 p_buf-> r_TIC_1.count = 0;
2561
2562 /* initialize r_read_FF command */
2563 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2564 p_buf-> r_read_FF.cda =
2565 (__u32)__pa(&(pClawH->flag));
2566 p_buf-> r_read_FF.flags =
2567 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
2568 p_buf-> r_read_FF.count = 1;
2569
2570 /* initialize r_TIC_2 */
2571 memcpy(&p_buf->r_TIC_2,
2572 &p_buf->r_TIC_1, sizeof(struct ccw1));
2573
2574 /* initialize Header */
2575 p_buf->header.length=0xffff;
2576 p_buf->header.opcode=0xff;
2577 p_buf->header.flag=CLAW_PENDING;
2578
2579 if (((unsigned long)p_buff+privptr->p_env->read_size) >=
2580 ((unsigned long)(p_buff+2*(privptr->p_env->read_size) -1)
2581 & PAGE_MASK) ) {
2582 p_buff= p_buff+privptr->p_env->read_size;
2583 }
2584 else {
2585 p_buff=
2586 (void *)((unsigned long)
2587 (p_buff+2*(privptr->p_env->read_size) -1)
2588 & PAGE_MASK) ;
2589 }
2590 } /* for read_buffers */
2591 } /* read_size < PAGE_SIZE */
2592 else { /* read Size >= PAGE_SIZE */
2593
2594 #ifdef DEBUGMSG
2595 printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
2596 dev->name,__FUNCTION__);
2597 #endif
2598 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
2599 p_buff = (void *)__get_free_pages(__GFP_DMA,
2600 (int)pages_to_order_of_mag(privptr->p_buff_pages_perread) );
2601 if (p_buff==NULL) {
2602 printk(KERN_INFO "%s: %s() __get_free_pages for read "
2603 "buf failed : get is for %d pages\n",
2604 dev->name,__FUNCTION__,
2605 privptr->p_buff_pages_perread );
2606 free_pages((unsigned long)privptr->p_buff_ccw,
2607 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
2608 /* free the write pages */
2609 p_buf=privptr->p_buff_write;
2610 while (p_buf!=NULL) {
2611 free_pages((unsigned long)p_buf->p_buffer,
2612 (int)pages_to_order_of_mag(
2613 privptr->p_buff_pages_perwrite ));
2614 p_buf=p_buf->next;
2615 }
2616 /* free any read pages already alloc */
2617 p_buf=privptr->p_buff_read;
2618 while (p_buf!=NULL) {
2619 free_pages((unsigned long)p_buf->p_buffer,
2620 (int)pages_to_order_of_mag(
2621 privptr->p_buff_pages_perread ));
2622 p_buf=p_buf->next;
2623 }
2624 privptr->p_buff_ccw=NULL;
2625 privptr->p_buff_write=NULL;
2626 #ifdef FUNCTRACE
2627 printk(KERN_INFO "%s: %s() exit on line %d, rc = ENOMEM\n",
2628 dev->name,__FUNCTION__,
2629 __LINE__);
2630 #endif
2631 return -ENOMEM;
2632 }
2633 memset(p_buff, 0x00, privptr->p_env->read_size);
2634 p_buf = p_free_chain;
2635 privptr->p_buff_read = p_buf;
2636 p_free_chain = p_buf->next;
2637
2638 if (p_last_CCWB==NULL) {
2639 p_buf->next=NULL;
2640 real_TIC_address=0;
2641 p_last_CCWB=p_buf;
2642 }
2643 else {
2644 p_buf->next=p_first_CCWB;
2645 real_TIC_address=
2646 (addr_t)__pa(
2647 &p_first_CCWB -> read );
2648 }
2649
2650 p_first_CCWB=p_buf;
2651 /* save buff address */
2652 p_buf->p_buffer=(struct clawbuf *)p_buff;
2653 /* initialize read command */
2654 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
2655 p_buf-> read.cda = (__u32)__pa(p_buff);
2656 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2657 p_buf-> read.count = privptr->p_env->read_size;
2658
2659 /* initialize read_h command */
2660 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
2661 p_buf-> read_h.cda =
2662 (__u32)__pa(&(p_buf->header));
2663 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2664 p_buf-> read_h.count = sizeof(struct clawh);
2665
2666 /* initialize Signal command */
2667 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
2668 p_buf-> signal.cda =
2669 (__u32)__pa(&(pClawH->flag));
2670 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2671 p_buf-> signal.count = 1;
2672
2673 /* initialize r_TIC_1 command */
2674 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2675 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
2676 p_buf-> r_TIC_1.flags = 0;
2677 p_buf-> r_TIC_1.count = 0;
2678
2679 /* initialize r_read_FF command */
2680 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2681 p_buf-> r_read_FF.cda =
2682 (__u32)__pa(&(pClawH->flag));
2683 p_buf-> r_read_FF.flags =
2684 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
2685 p_buf-> r_read_FF.count = 1;
2686
2687 /* initialize r_TIC_2 */
2688 memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
2689 sizeof(struct ccw1));
2690
2691 /* initialize Header */
2692 p_buf->header.length=0xffff;
2693 p_buf->header.opcode=0xff;
2694 p_buf->header.flag=CLAW_PENDING;
2695
2696 } /* For read_buffers */
2697 } /* read_size >= PAGE_SIZE */
2698 } /* pBuffread = NULL */
2699 #ifdef DEBUGMSG
2700 printk(KERN_INFO "%s: %s() > End build claw read free chain \n",
2701 dev->name,__FUNCTION__);
2702 p_buf=p_first_CCWB;
2703 while (p_buf!=NULL) {
2704 dumpit((char *)p_buf, sizeof(struct ccwbk));
2705 p_buf=p_buf->next;
2706 }
2707
2708 #endif
2709 add_claw_reads( dev ,p_first_CCWB , p_last_CCWB);
2710 privptr->buffs_alloc = 1;
2711 #ifdef FUNCTRACE
2712 printk(KERN_INFO "%s: %s() exit on line %d\n",
2713 dev->name,__FUNCTION__,__LINE__);
2714 #endif
2715 return 0;
2716 } /* end of init_ccw_bk */
2717
2718 /*-------------------------------------------------------------------*
2719 * *
2720 * probe_error *
2721 * *
2722 *--------------------------------------------------------------------*/
2723
2724 static void
2725 probe_error( struct ccwgroup_device *cgdev)
2726 {
2727 struct claw_privbk *privptr;
2728 #ifdef FUNCTRACE
2729 printk(KERN_INFO "%s enter \n",__FUNCTION__);
2730 #endif
2731 CLAW_DBF_TEXT(4,trace,"proberr");
2732 #ifdef DEBUGMSG
2733 printk(KERN_INFO "%s variable cgdev =\n",__FUNCTION__);
2734 dumpit((char *) cgdev, sizeof(struct ccwgroup_device));
2735 #endif
2736 privptr=(struct claw_privbk *)cgdev->dev.driver_data;
2737 if (privptr!=NULL) {
2738 kfree(privptr->p_env);
2739 privptr->p_env=NULL;
2740 kfree(privptr->p_mtc_envelope);
2741 privptr->p_mtc_envelope=NULL;
2742 kfree(privptr);
2743 privptr=NULL;
2744 }
2745 #ifdef FUNCTRACE
2746 printk(KERN_INFO "%s > exit on line %d\n",
2747 __FUNCTION__,__LINE__);
2748 #endif
2749
2750 return;
2751 } /* probe_error */
2752
2753
2754
2755 /*-------------------------------------------------------------------*
2756 * claw_process_control *
2757 * *
2758 * *
2759 *--------------------------------------------------------------------*/
2760
2761 static int
2762 claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
2763 {
2764
2765 struct clawbuf *p_buf;
2766 struct clawctl ctlbk;
2767 struct clawctl *p_ctlbk;
2768 char temp_host_name[8];
2769 char temp_ws_name[8];
2770 struct claw_privbk *privptr;
2771 struct claw_env *p_env;
2772 struct sysval *p_sysval;
2773 struct conncmd *p_connect=NULL;
2774 int rc;
2775 struct chbk *p_ch = NULL;
2776 #ifdef FUNCTRACE
2777 printk(KERN_INFO "%s: %s() > enter \n",
2778 dev->name,__FUNCTION__);
2779 #endif
2780 CLAW_DBF_TEXT(2,setup,"clw_cntl");
2781 #ifdef DEBUGMSG
2782 printk(KERN_INFO "%s: variable dev =\n",dev->name);
2783 dumpit((char *) dev, sizeof(struct net_device));
2784 printk(KERN_INFO "%s: variable p_ccw =\n",dev->name);
2785 dumpit((char *) p_ccw, sizeof(struct ccwbk *));
2786 #endif
2787 udelay(1000); /* Wait a ms for the control packets to
2788 *catch up to each other */
2789 privptr=dev->priv;
2790 p_env=privptr->p_env;
2791 memcpy( &temp_host_name, p_env->host_name, 8);
2792 memcpy( &temp_ws_name, p_env->adapter_name , 8);
2793 printk(KERN_INFO "%s: CLAW device %.8s: "
2794 "Received Control Packet\n",
2795 dev->name, temp_ws_name);
2796 if (privptr->release_pend==1) {
2797 #ifdef FUNCTRACE
2798 printk(KERN_INFO "%s: %s() > "
2799 "exit on line %d, rc=0\n",
2800 dev->name,__FUNCTION__,__LINE__);
2801 #endif
2802 return 0;
2803 }
2804 p_buf=p_ccw->p_buffer;
2805 p_ctlbk=&ctlbk;
2806 if (p_env->packing == DO_PACKED) { /* packing in progress?*/
2807 memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
2808 } else {
2809 memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
2810 }
2811 #ifdef IOTRACE
2812 printk(KERN_INFO "%s: dump claw control data inbound\n",dev->name);
2813 dumpit((char *)p_ctlbk, sizeof(struct clawctl));
2814 #endif
2815 switch (p_ctlbk->command)
2816 {
2817 case SYSTEM_VALIDATE_REQUEST:
2818 if (p_ctlbk->version!=CLAW_VERSION_ID) {
2819 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2820 CLAW_RC_WRONG_VERSION );
2821 printk("%s: %d is wrong version id. "
2822 "Expected %d\n",
2823 dev->name, p_ctlbk->version,
2824 CLAW_VERSION_ID);
2825 }
2826 p_sysval=(struct sysval *)&(p_ctlbk->data);
2827 printk( "%s: Recv Sys Validate Request: "
2828 "Vers=%d,link_id=%d,Corr=%d,WS name=%."
2829 "8s,Host name=%.8s\n",
2830 dev->name, p_ctlbk->version,
2831 p_ctlbk->linkid,
2832 p_ctlbk->correlator,
2833 p_sysval->WS_name,
2834 p_sysval->host_name);
2835 if (0!=memcmp(temp_host_name,p_sysval->host_name,8)) {
2836 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2837 CLAW_RC_NAME_MISMATCH );
2838 CLAW_DBF_TEXT(2,setup,"HSTBAD");
2839 CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->host_name);
2840 CLAW_DBF_TEXT_(2,setup,"%s",temp_host_name);
2841 printk(KERN_INFO "%s: Host name mismatch\n",
2842 dev->name);
2843 printk(KERN_INFO "%s: Received :%s: "
2844 "expected :%s: \n",
2845 dev->name,
2846 p_sysval->host_name,
2847 temp_host_name);
2848 }
2849 if (0!=memcmp(temp_ws_name,p_sysval->WS_name,8)) {
2850 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2851 CLAW_RC_NAME_MISMATCH );
2852 CLAW_DBF_TEXT(2,setup,"WSNBAD");
2853 CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->WS_name);
2854 CLAW_DBF_TEXT_(2,setup,"%s",temp_ws_name);
2855 printk(KERN_INFO "%s: WS name mismatch\n",
2856 dev->name);
2857 printk(KERN_INFO "%s: Received :%s: "
2858 "expected :%s: \n",
2859 dev->name,
2860 p_sysval->WS_name,
2861 temp_ws_name);
2862 }
2863 if (( p_sysval->write_frame_size < p_env->write_size) &&
2864 ( p_env->packing == 0)) {
2865 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2866 CLAW_RC_HOST_RCV_TOO_SMALL );
2867 printk(KERN_INFO "%s: host write size is too "
2868 "small\n", dev->name);
2869 CLAW_DBF_TEXT(2,setup,"wrtszbad");
2870 }
2871 if (( p_sysval->read_frame_size < p_env->read_size) &&
2872 ( p_env->packing == 0)) {
2873 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2874 CLAW_RC_HOST_RCV_TOO_SMALL );
2875 printk(KERN_INFO "%s: host read size is too "
2876 "small\n", dev->name);
2877 CLAW_DBF_TEXT(2,setup,"rdsizbad");
2878 }
2879 claw_snd_sys_validate_rsp(dev, p_ctlbk, 0 );
2880 printk("%s: CLAW device %.8s: System validate"
2881 " completed.\n",dev->name, temp_ws_name);
2882 printk("%s: sys Validate Rsize:%d Wsize:%d\n",dev->name,
2883 p_sysval->read_frame_size,p_sysval->write_frame_size);
2884 privptr->system_validate_comp=1;
2885 if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
2886 p_env->packing = PACKING_ASK;
2887 }
2888 claw_strt_conn_req(dev);
2889 break;
2890
2891 case SYSTEM_VALIDATE_RESPONSE:
2892 p_sysval=(struct sysval *)&(p_ctlbk->data);
2893 printk("%s: Recv Sys Validate Resp: Vers=%d,Corr=%d,RC=%d,"
2894 "WS name=%.8s,Host name=%.8s\n",
2895 dev->name,
2896 p_ctlbk->version,
2897 p_ctlbk->correlator,
2898 p_ctlbk->rc,
2899 p_sysval->WS_name,
2900 p_sysval->host_name);
2901 switch (p_ctlbk->rc)
2902 {
2903 case 0:
2904 printk(KERN_INFO "%s: CLAW device "
2905 "%.8s: System validate "
2906 "completed.\n",
2907 dev->name, temp_ws_name);
2908 if (privptr->system_validate_comp == 0)
2909 claw_strt_conn_req(dev);
2910 privptr->system_validate_comp=1;
2911 break;
2912 case CLAW_RC_NAME_MISMATCH:
2913 printk(KERN_INFO "%s: Sys Validate "
2914 "Resp : Host, WS name is "
2915 "mismatch\n",
2916 dev->name);
2917 break;
2918 case CLAW_RC_WRONG_VERSION:
2919 printk(KERN_INFO "%s: Sys Validate "
2920 "Resp : Wrong version\n",
2921 dev->name);
2922 break;
2923 case CLAW_RC_HOST_RCV_TOO_SMALL:
2924 printk(KERN_INFO "%s: Sys Validate "
2925 "Resp : bad frame size\n",
2926 dev->name);
2927 break;
2928 default:
2929 printk(KERN_INFO "%s: Sys Validate "
2930 "error code=%d \n",
2931 dev->name, p_ctlbk->rc );
2932 break;
2933 }
2934 break;
2935
2936 case CONNECTION_REQUEST:
2937 p_connect=(struct conncmd *)&(p_ctlbk->data);
2938 printk(KERN_INFO "%s: Recv Conn Req: Vers=%d,link_id=%d,"
2939 "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
2940 dev->name,
2941 p_ctlbk->version,
2942 p_ctlbk->linkid,
2943 p_ctlbk->correlator,
2944 p_connect->host_name,
2945 p_connect->WS_name);
2946 if (privptr->active_link_ID!=0 ) {
2947 claw_snd_disc(dev, p_ctlbk);
2948 printk(KERN_INFO "%s: Conn Req error : "
2949 "already logical link is active \n",
2950 dev->name);
2951 }
2952 if (p_ctlbk->linkid!=1 ) {
2953 claw_snd_disc(dev, p_ctlbk);
2954 printk(KERN_INFO "%s: Conn Req error : "
2955 "req logical link id is not 1\n",
2956 dev->name);
2957 }
2958 rc=find_link(dev,
2959 p_connect->host_name, p_connect->WS_name);
2960 if (rc!=0) {
2961 claw_snd_disc(dev, p_ctlbk);
2962 printk(KERN_INFO "%s: Conn Req error : "
2963 "req appl name does not match\n",
2964 dev->name);
2965 }
2966 claw_send_control(dev,
2967 CONNECTION_CONFIRM, p_ctlbk->linkid,
2968 p_ctlbk->correlator,
2969 0, p_connect->host_name,
2970 p_connect->WS_name);
2971 if (p_env->packing == PACKING_ASK) {
2972 printk("%s: Now Pack ask\n",dev->name);
2973 p_env->packing = PACK_SEND;
2974 claw_snd_conn_req(dev,0);
2975 }
2976 printk(KERN_INFO "%s: CLAW device %.8s: Connection "
2977 "completed link_id=%d.\n",
2978 dev->name, temp_ws_name,
2979 p_ctlbk->linkid);
2980 privptr->active_link_ID=p_ctlbk->linkid;
2981 p_ch=&privptr->channel[WRITE];
2982 wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */
2983 break;
2984 case CONNECTION_RESPONSE:
2985 p_connect=(struct conncmd *)&(p_ctlbk->data);
2986 printk(KERN_INFO "%s: Revc Conn Resp: Vers=%d,link_id=%d,"
2987 "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
2988 dev->name,
2989 p_ctlbk->version,
2990 p_ctlbk->linkid,
2991 p_ctlbk->correlator,
2992 p_ctlbk->rc,
2993 p_connect->host_name,
2994 p_connect->WS_name);
2995
2996 if (p_ctlbk->rc !=0 ) {
2997 printk(KERN_INFO "%s: Conn Resp error: rc=%d \n",
2998 dev->name, p_ctlbk->rc);
2999 return 1;
3000 }
3001 rc=find_link(dev,
3002 p_connect->host_name, p_connect->WS_name);
3003 if (rc!=0) {
3004 claw_snd_disc(dev, p_ctlbk);
3005 printk(KERN_INFO "%s: Conn Resp error: "
3006 "req appl name does not match\n",
3007 dev->name);
3008 }
3009 /* should be until CONNECTION_CONFIRM */
3010 privptr->active_link_ID = - (p_ctlbk->linkid);
3011 break;
3012 case CONNECTION_CONFIRM:
3013 p_connect=(struct conncmd *)&(p_ctlbk->data);
3014 printk(KERN_INFO "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
3015 "Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
3016 dev->name,
3017 p_ctlbk->version,
3018 p_ctlbk->linkid,
3019 p_ctlbk->correlator,
3020 p_connect->host_name,
3021 p_connect->WS_name);
3022 if (p_ctlbk->linkid== -(privptr->active_link_ID)) {
3023 privptr->active_link_ID=p_ctlbk->linkid;
3024 if (p_env->packing > PACKING_ASK) {
3025 printk(KERN_INFO "%s: Confirmed Now packing\n",dev->name);
3026 p_env->packing = DO_PACKED;
3027 }
3028 p_ch=&privptr->channel[WRITE];
3029 wake_up(&p_ch->wait);
3030 }
3031 else {
3032 printk(KERN_INFO "%s: Conn confirm: "
3033 "unexpected linkid=%d \n",
3034 dev->name, p_ctlbk->linkid);
3035 claw_snd_disc(dev, p_ctlbk);
3036 }
3037 break;
3038 case DISCONNECT:
3039 printk(KERN_INFO "%s: Disconnect: "
3040 "Vers=%d,link_id=%d,Corr=%d\n",
3041 dev->name, p_ctlbk->version,
3042 p_ctlbk->linkid, p_ctlbk->correlator);
3043 if ((p_ctlbk->linkid == 2) &&
3044 (p_env->packing == PACK_SEND)) {
3045 privptr->active_link_ID = 1;
3046 p_env->packing = DO_PACKED;
3047 }
3048 else
3049 privptr->active_link_ID=0;
3050 break;
3051 case CLAW_ERROR:
3052 printk(KERN_INFO "%s: CLAW ERROR detected\n",
3053 dev->name);
3054 break;
3055 default:
3056 printk(KERN_INFO "%s: Unexpected command code=%d \n",
3057 dev->name, p_ctlbk->command);
3058 break;
3059 }
3060
3061 #ifdef FUNCTRACE
3062 printk(KERN_INFO "%s: %s() exit on line %d, rc = 0\n",
3063 dev->name,__FUNCTION__,__LINE__);
3064 #endif
3065
3066 return 0;
3067 } /* end of claw_process_control */
3068
3069
3070 /*-------------------------------------------------------------------*
3071 * claw_send_control *
3072 * *
3073 *--------------------------------------------------------------------*/
3074
3075 static int
3076 claw_send_control(struct net_device *dev, __u8 type, __u8 link,
3077 __u8 correlator, __u8 rc, char *local_name, char *remote_name)
3078 {
3079 struct claw_privbk *privptr;
3080 struct clawctl *p_ctl;
3081 struct sysval *p_sysval;
3082 struct conncmd *p_connect;
3083 struct sk_buff *skb;
3084
3085 #ifdef FUNCTRACE
3086 printk(KERN_INFO "%s:%s > enter \n",dev->name,__FUNCTION__);
3087 #endif
3088 CLAW_DBF_TEXT(2,setup,"sndcntl");
3089 #ifdef DEBUGMSG
3090 printk(KERN_INFO "%s: Sending Control Packet \n",dev->name);
3091 printk(KERN_INFO "%s: variable type = 0x%X, link = "
3092 "%d, correlator = %d, rc = %d\n",
3093 dev->name,type, link, correlator, rc);
3094 printk(KERN_INFO "%s: variable local_name = %s, "
3095 "remote_name = %s\n",dev->name, local_name, remote_name);
3096 #endif
3097 privptr=dev->priv;
3098 p_ctl=(struct clawctl *)&privptr->ctl_bk;
3099
3100 p_ctl->command=type;
3101 p_ctl->version=CLAW_VERSION_ID;
3102 p_ctl->linkid=link;
3103 p_ctl->correlator=correlator;
3104 p_ctl->rc=rc;
3105
3106 p_sysval=(struct sysval *)&p_ctl->data;
3107 p_connect=(struct conncmd *)&p_ctl->data;
3108
3109 switch (p_ctl->command) {
3110 case SYSTEM_VALIDATE_REQUEST:
3111 case SYSTEM_VALIDATE_RESPONSE:
3112 memcpy(&p_sysval->host_name, local_name, 8);
3113 memcpy(&p_sysval->WS_name, remote_name, 8);
3114 if (privptr->p_env->packing > 0) {
3115 p_sysval->read_frame_size=DEF_PACK_BUFSIZE;
3116 p_sysval->write_frame_size=DEF_PACK_BUFSIZE;
3117 } else {
3118 /* how big is the piggest group of packets */
3119 p_sysval->read_frame_size=privptr->p_env->read_size;
3120 p_sysval->write_frame_size=privptr->p_env->write_size;
3121 }
3122 memset(&p_sysval->reserved, 0x00, 4);
3123 break;
3124 case CONNECTION_REQUEST:
3125 case CONNECTION_RESPONSE:
3126 case CONNECTION_CONFIRM:
3127 case DISCONNECT:
3128 memcpy(&p_sysval->host_name, local_name, 8);
3129 memcpy(&p_sysval->WS_name, remote_name, 8);
3130 if (privptr->p_env->packing > 0) {
3131 /* How big is the biggest packet */
3132 p_connect->reserved1[0]=CLAW_FRAME_SIZE;
3133 p_connect->reserved1[1]=CLAW_FRAME_SIZE;
3134 } else {
3135 memset(&p_connect->reserved1, 0x00, 4);
3136 memset(&p_connect->reserved2, 0x00, 4);
3137 }
3138 break;
3139 default:
3140 break;
3141 }
3142
3143 /* write Control Record to the device */
3144
3145
3146 skb = dev_alloc_skb(sizeof(struct clawctl));
3147 if (!skb) {
3148 printk( "%s:%s low on mem, returning...\n",
3149 dev->name,__FUNCTION__);
3150 #ifdef DEBUG
3151 printk(KERN_INFO "%s:%s Exit, rc = ENOMEM\n",
3152 dev->name,__FUNCTION__);
3153 #endif
3154 return -ENOMEM;
3155 }
3156 memcpy(skb_put(skb, sizeof(struct clawctl)),
3157 p_ctl, sizeof(struct clawctl));
3158 #ifdef IOTRACE
3159 printk(KERN_INFO "%s: outbnd claw cntl data \n",dev->name);
3160 dumpit((char *)p_ctl,sizeof(struct clawctl));
3161 #endif
3162 if (privptr->p_env->packing >= PACK_SEND)
3163 claw_hw_tx(skb, dev, 1);
3164 else
3165 claw_hw_tx(skb, dev, 0);
3166 #ifdef FUNCTRACE
3167 printk(KERN_INFO "%s:%s Exit on line %d\n",
3168 dev->name,__FUNCTION__,__LINE__);
3169 #endif
3170
3171 return 0;
3172 } /* end of claw_send_control */
3173
3174 /*-------------------------------------------------------------------*
3175 * claw_snd_conn_req *
3176 * *
3177 *--------------------------------------------------------------------*/
3178 static int
3179 claw_snd_conn_req(struct net_device *dev, __u8 link)
3180 {
3181 int rc;
3182 struct claw_privbk *privptr=dev->priv;
3183 struct clawctl *p_ctl;
3184
3185 #ifdef FUNCTRACE
3186 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
3187 #endif
3188 CLAW_DBF_TEXT(2,setup,"snd_conn");
3189 #ifdef DEBUGMSG
3190 printk(KERN_INFO "%s: variable link = %X, dev =\n",dev->name, link);
3191 dumpit((char *) dev, sizeof(struct net_device));
3192 #endif
3193 rc = 1;
3194 p_ctl=(struct clawctl *)&privptr->ctl_bk;
3195 p_ctl->linkid = link;
3196 if ( privptr->system_validate_comp==0x00 ) {
3197 #ifdef FUNCTRACE
3198 printk(KERN_INFO "%s:%s Exit on line %d, rc = 1\n",
3199 dev->name,__FUNCTION__,__LINE__);
3200 #endif
3201 return rc;
3202 }
3203 if (privptr->p_env->packing == PACKING_ASK )
3204 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3205 WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
3206 if (privptr->p_env->packing == PACK_SEND) {
3207 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3208 WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
3209 }
3210 if (privptr->p_env->packing == 0)
3211 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3212 HOST_APPL_NAME, privptr->p_env->api_type);
3213 #ifdef FUNCTRACE
3214 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3215 dev->name,__FUNCTION__,__LINE__, rc);
3216 #endif
3217 return rc;
3218
3219 } /* end of claw_snd_conn_req */
3220
3221
3222 /*-------------------------------------------------------------------*
3223 * claw_snd_disc *
3224 * *
3225 *--------------------------------------------------------------------*/
3226
3227 static int
3228 claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
3229 {
3230 int rc;
3231 struct conncmd * p_connect;
3232
3233 #ifdef FUNCTRACE
3234 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3235 #endif
3236 CLAW_DBF_TEXT(2,setup,"snd_dsc");
3237 #ifdef DEBUGMSG
3238 printk(KERN_INFO "%s: variable dev =\n",dev->name);
3239 dumpit((char *) dev, sizeof(struct net_device));
3240 printk(KERN_INFO "%s: variable p_ctl",dev->name);
3241 dumpit((char *) p_ctl, sizeof(struct clawctl));
3242 #endif
3243 p_connect=(struct conncmd *)&p_ctl->data;
3244
3245 rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
3246 p_ctl->correlator, 0,
3247 p_connect->host_name, p_connect->WS_name);
3248 #ifdef FUNCTRACE
3249 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3250 dev->name,__FUNCTION__, __LINE__, rc);
3251 #endif
3252 return rc;
3253 } /* end of claw_snd_disc */
3254
3255
3256 /*-------------------------------------------------------------------*
3257 * claw_snd_sys_validate_rsp *
3258 * *
3259 *--------------------------------------------------------------------*/
3260
3261 static int
3262 claw_snd_sys_validate_rsp(struct net_device *dev,
3263 struct clawctl *p_ctl, __u32 return_code)
3264 {
3265 struct claw_env * p_env;
3266 struct claw_privbk *privptr;
3267 int rc;
3268
3269 #ifdef FUNCTRACE
3270 printk(KERN_INFO "%s:%s Enter\n",
3271 dev->name,__FUNCTION__);
3272 #endif
3273 CLAW_DBF_TEXT(2,setup,"chkresp");
3274 #ifdef DEBUGMSG
3275 printk(KERN_INFO "%s: variable return_code = %d, dev =\n",
3276 dev->name, return_code);
3277 dumpit((char *) dev, sizeof(struct net_device));
3278 printk(KERN_INFO "%s: variable p_ctl =\n",dev->name);
3279 dumpit((char *) p_ctl, sizeof(struct clawctl));
3280 #endif
3281 privptr = dev->priv;
3282 p_env=privptr->p_env;
3283 rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
3284 p_ctl->linkid,
3285 p_ctl->correlator,
3286 return_code,
3287 p_env->host_name,
3288 p_env->adapter_name );
3289 #ifdef FUNCTRACE
3290 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3291 dev->name,__FUNCTION__,__LINE__, rc);
3292 #endif
3293 return rc;
3294 } /* end of claw_snd_sys_validate_rsp */
3295
3296 /*-------------------------------------------------------------------*
3297 * claw_strt_conn_req *
3298 * *
3299 *--------------------------------------------------------------------*/
3300
3301 static int
3302 claw_strt_conn_req(struct net_device *dev )
3303 {
3304 int rc;
3305
3306 #ifdef FUNCTRACE
3307 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3308 #endif
3309 CLAW_DBF_TEXT(2,setup,"conn_req");
3310 #ifdef DEBUGMSG
3311 printk(KERN_INFO "%s: variable dev =\n",dev->name);
3312 dumpit((char *) dev, sizeof(struct net_device));
3313 #endif
3314 rc=claw_snd_conn_req(dev, 1);
3315 #ifdef FUNCTRACE
3316 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3317 dev->name,__FUNCTION__,__LINE__, rc);
3318 #endif
3319 return rc;
3320 } /* end of claw_strt_conn_req */
3321
3322
3323
3324 /*-------------------------------------------------------------------*
3325 * claw_stats *
3326 *-------------------------------------------------------------------*/
3327
3328 static struct
3329 net_device_stats *claw_stats(struct net_device *dev)
3330 {
3331 struct claw_privbk *privptr;
3332 #ifdef FUNCTRACE
3333 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3334 #endif
3335 CLAW_DBF_TEXT(4,trace,"stats");
3336 privptr = dev->priv;
3337 #ifdef FUNCTRACE
3338 printk(KERN_INFO "%s:%s Exit on line %d\n",
3339 dev->name,__FUNCTION__,__LINE__);
3340 #endif
3341 return &privptr->stats;
3342 } /* end of claw_stats */
3343
3344
3345 /*-------------------------------------------------------------------*
3346 * unpack_read *
3347 * *
3348 *--------------------------------------------------------------------*/
3349 static void
3350 unpack_read(struct net_device *dev )
3351 {
3352 struct sk_buff *skb;
3353 struct claw_privbk *privptr;
3354 struct claw_env *p_env;
3355 struct ccwbk *p_this_ccw;
3356 struct ccwbk *p_first_ccw;
3357 struct ccwbk *p_last_ccw;
3358 struct clawph *p_packh;
3359 void *p_packd;
3360 struct clawctl *p_ctlrec=NULL;
3361
3362 __u32 len_of_data;
3363 __u32 pack_off;
3364 __u8 link_num;
3365 __u8 mtc_this_frm=0;
3366 __u32 bytes_to_mov;
3367 struct chbk *p_ch = NULL;
3368 int i=0;
3369 int p=0;
3370
3371 #ifdef FUNCTRACE
3372 printk(KERN_INFO "%s:%s enter \n",dev->name,__FUNCTION__);
3373 #endif
3374 CLAW_DBF_TEXT(4,trace,"unpkread");
3375 p_first_ccw=NULL;
3376 p_last_ccw=NULL;
3377 p_packh=NULL;
3378 p_packd=NULL;
3379 privptr=dev->priv;
3380 p_env = privptr->p_env;
3381 p_this_ccw=privptr->p_read_active_first;
3382 i=0;
3383 while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
3384 #ifdef IOTRACE
3385 printk(KERN_INFO "%s p_this_ccw \n",dev->name);
3386 dumpit((char*)p_this_ccw, sizeof(struct ccwbk));
3387 printk(KERN_INFO "%s Inbound p_this_ccw->p_buffer(64)"
3388 " pk=%d \n",dev->name,p_env->packing);
3389 dumpit((char *)p_this_ccw->p_buffer, 64 );
3390 #endif
3391 pack_off = 0;
3392 p = 0;
3393 p_this_ccw->header.flag=CLAW_PENDING;
3394 privptr->p_read_active_first=p_this_ccw->next;
3395 p_this_ccw->next=NULL;
3396 p_packh = (struct clawph *)p_this_ccw->p_buffer;
3397 if ((p_env->packing == PACK_SEND) &&
3398 (p_packh->len == 32) &&
3399 (p_packh->link_num == 0)) { /* is it a packed ctl rec? */
3400 p_packh++; /* peek past pack header */
3401 p_ctlrec = (struct clawctl *)p_packh;
3402 p_packh--; /* un peek */
3403 if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
3404 (p_ctlrec->command == CONNECTION_CONFIRM))
3405 p_env->packing = DO_PACKED;
3406 }
3407 if (p_env->packing == DO_PACKED)
3408 link_num=p_packh->link_num;
3409 else
3410 link_num=p_this_ccw->header.opcode / 8;
3411 if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
3412 #ifdef DEBUGMSG
3413 printk(KERN_INFO "%s: %s > More_to_come is ON\n",
3414 dev->name,__FUNCTION__);
3415 #endif
3416 mtc_this_frm=1;
3417 if (p_this_ccw->header.length!=
3418 privptr->p_env->read_size ) {
3419 printk(KERN_INFO " %s: Invalid frame detected "
3420 "length is %02x\n" ,
3421 dev->name, p_this_ccw->header.length);
3422 }
3423 }
3424
3425 if (privptr->mtc_skipping) {
3426 /*
3427 * We're in the mode of skipping past a
3428 * multi-frame message
3429 * that we can't process for some reason or other.
3430 * The first frame without the More-To-Come flag is
3431 * the last frame of the skipped message.
3432 */
3433 /* in case of More-To-Come not set in this frame */
3434 if (mtc_this_frm==0) {
3435 privptr->mtc_skipping=0; /* Ok, the end */
3436 privptr->mtc_logical_link=-1;
3437 }
3438 #ifdef DEBUGMSG
3439 printk(KERN_INFO "%s:%s goto next "
3440 "frame from MoretoComeSkip \n",
3441 dev->name,__FUNCTION__);
3442 #endif
3443 goto NextFrame;
3444 }
3445
3446 if (link_num==0) {
3447 claw_process_control(dev, p_this_ccw);
3448 #ifdef DEBUGMSG
3449 printk(KERN_INFO "%s:%s goto next "
3450 "frame from claw_process_control \n",
3451 dev->name,__FUNCTION__);
3452 #endif
3453 CLAW_DBF_TEXT(4,trace,"UnpkCntl");
3454 goto NextFrame;
3455 }
3456 unpack_next:
3457 if (p_env->packing == DO_PACKED) {
3458 if (pack_off > p_env->read_size)
3459 goto NextFrame;
3460 p_packd = p_this_ccw->p_buffer+pack_off;
3461 p_packh = (struct clawph *) p_packd;
3462 if ((p_packh->len == 0) || /* all done with this frame? */
3463 (p_packh->flag != 0))
3464 goto NextFrame;
3465 bytes_to_mov = p_packh->len;
3466 pack_off += bytes_to_mov+sizeof(struct clawph);
3467 p++;
3468 } else {
3469 bytes_to_mov=p_this_ccw->header.length;
3470 }
3471 if (privptr->mtc_logical_link<0) {
3472 #ifdef DEBUGMSG
3473 printk(KERN_INFO "%s: %s mtc_logical_link < 0 \n",
3474 dev->name,__FUNCTION__);
3475 #endif
3476
3477 /*
3478 * if More-To-Come is set in this frame then we don't know
3479 * length of entire message, and hence have to allocate
3480 * large buffer */
3481
3482 /* We are starting a new envelope */
3483 privptr->mtc_offset=0;
3484 privptr->mtc_logical_link=link_num;
3485 }
3486
3487 if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
3488 /* error */
3489 #ifdef DEBUGMSG
3490 printk(KERN_INFO "%s: %s > goto next "
3491 "frame from MoretoComeSkip \n",
3492 dev->name,
3493 __FUNCTION__);
3494 printk(KERN_INFO " bytes_to_mov %d > (MAX_ENVELOPE_"
3495 "SIZE-privptr->mtc_offset %d)\n",
3496 bytes_to_mov,(MAX_ENVELOPE_SIZE- privptr->mtc_offset));
3497 #endif
3498 privptr->stats.rx_frame_errors++;
3499 goto NextFrame;
3500 }
3501 if (p_env->packing == DO_PACKED) {
3502 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
3503 p_packd+sizeof(struct clawph), bytes_to_mov);
3504
3505 } else {
3506 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
3507 p_this_ccw->p_buffer, bytes_to_mov);
3508 }
3509 #ifdef DEBUGMSG
3510 printk(KERN_INFO "%s: %s() received data \n",
3511 dev->name,__FUNCTION__);
3512 if (p_env->packing == DO_PACKED)
3513 dumpit((char *)p_packd+sizeof(struct clawph),32);
3514 else
3515 dumpit((char *)p_this_ccw->p_buffer, 32);
3516 printk(KERN_INFO "%s: %s() bytelength %d \n",
3517 dev->name,__FUNCTION__,bytes_to_mov);
3518 #endif
3519 if (mtc_this_frm==0) {
3520 len_of_data=privptr->mtc_offset+bytes_to_mov;
3521 skb=dev_alloc_skb(len_of_data);
3522 if (skb) {
3523 memcpy(skb_put(skb,len_of_data),
3524 privptr->p_mtc_envelope,
3525 len_of_data);
3526 skb->dev=dev;
3527 skb_reset_mac_header(skb);
3528 skb->protocol=htons(ETH_P_IP);
3529 skb->ip_summed=CHECKSUM_UNNECESSARY;
3530 privptr->stats.rx_packets++;
3531 privptr->stats.rx_bytes+=len_of_data;
3532 netif_rx(skb);
3533 #ifdef DEBUGMSG
3534 printk(KERN_INFO "%s: %s() netif_"
3535 "rx(skb) completed \n",
3536 dev->name,__FUNCTION__);
3537 #endif
3538 }
3539 else {
3540 privptr->stats.rx_dropped++;
3541 printk(KERN_WARNING "%s: %s() low on memory\n",
3542 dev->name,__FUNCTION__);
3543 }
3544 privptr->mtc_offset=0;
3545 privptr->mtc_logical_link=-1;
3546 }
3547 else {
3548 privptr->mtc_offset+=bytes_to_mov;
3549 }
3550 if (p_env->packing == DO_PACKED)
3551 goto unpack_next;
3552 NextFrame:
3553 /*
3554 * Remove ThisCCWblock from active read queue, and add it
3555 * to queue of free blocks to be reused.
3556 */
3557 i++;
3558 p_this_ccw->header.length=0xffff;
3559 p_this_ccw->header.opcode=0xff;
3560 /*
3561 * add this one to the free queue for later reuse
3562 */
3563 if (p_first_ccw==NULL) {
3564 p_first_ccw = p_this_ccw;
3565 }
3566 else {
3567 p_last_ccw->next = p_this_ccw;
3568 }
3569 p_last_ccw = p_this_ccw;
3570 /*
3571 * chain to next block on active read queue
3572 */
3573 p_this_ccw = privptr->p_read_active_first;
3574 CLAW_DBF_TEXT_(4,trace,"rxpkt %d",p);
3575 } /* end of while */
3576
3577 /* check validity */
3578
3579 #ifdef IOTRACE
3580 printk(KERN_INFO "%s:%s processed frame is %d \n",
3581 dev->name,__FUNCTION__,i);
3582 printk(KERN_INFO "%s:%s F:%lx L:%lx\n",
3583 dev->name,
3584 __FUNCTION__,
3585 (unsigned long)p_first_ccw,
3586 (unsigned long)p_last_ccw);
3587 #endif
3588 CLAW_DBF_TEXT_(4,trace,"rxfrm %d",i);
3589 add_claw_reads(dev, p_first_ccw, p_last_ccw);
3590 p_ch=&privptr->channel[READ];
3591 claw_strt_read(dev, LOCK_YES);
3592 #ifdef FUNCTRACE
3593 printk(KERN_INFO "%s: %s exit on line %d\n",
3594 dev->name, __FUNCTION__, __LINE__);
3595 #endif
3596 return;
3597 } /* end of unpack_read */
3598
3599 /*-------------------------------------------------------------------*
3600 * claw_strt_read *
3601 * *
3602 *--------------------------------------------------------------------*/
3603 static void
3604 claw_strt_read (struct net_device *dev, int lock )
3605 {
3606 int rc = 0;
3607 __u32 parm;
3608 unsigned long saveflags = 0;
3609 struct claw_privbk *privptr=dev->priv;
3610 struct ccwbk*p_ccwbk;
3611 struct chbk *p_ch;
3612 struct clawh *p_clawh;
3613 p_ch=&privptr->channel[READ];
3614
3615 #ifdef FUNCTRACE
3616 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
3617 printk(KERN_INFO "%s: variable lock = %d, dev =\n",dev->name, lock);
3618 dumpit((char *) dev, sizeof(struct net_device));
3619 #endif
3620 CLAW_DBF_TEXT(4,trace,"StRdNter");
3621 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
3622 p_clawh->flag=CLAW_IDLE; /* 0x00 */
3623
3624 if ((privptr->p_write_active_first!=NULL &&
3625 privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
3626 (privptr->p_read_active_first!=NULL &&
3627 privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
3628 p_clawh->flag=CLAW_BUSY; /* 0xff */
3629 }
3630 #ifdef DEBUGMSG
3631 printk(KERN_INFO "%s:%s state-%02x\n" ,
3632 dev->name,__FUNCTION__, p_ch->claw_state);
3633 #endif
3634 if (lock==LOCK_YES) {
3635 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
3636 }
3637 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
3638 #ifdef DEBUGMSG
3639 printk(KERN_INFO "%s: HOT READ started in %s\n" ,
3640 dev->name,__FUNCTION__);
3641 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
3642 dumpit((char *)&p_clawh->flag , 1);
3643 #endif
3644 CLAW_DBF_TEXT(4,trace,"HotRead");
3645 p_ccwbk=privptr->p_read_active_first;
3646 parm = (unsigned long) p_ch;
3647 rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
3648 0xff, 0);
3649 if (rc != 0) {
3650 ccw_check_return_code(p_ch->cdev, rc);
3651 }
3652 }
3653 else {
3654 #ifdef DEBUGMSG
3655 printk(KERN_INFO "%s: No READ started by %s() In progress\n" ,
3656 dev->name,__FUNCTION__);
3657 #endif
3658 CLAW_DBF_TEXT(2,trace,"ReadAct");
3659 }
3660
3661 if (lock==LOCK_YES) {
3662 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
3663 }
3664 #ifdef FUNCTRACE
3665 printk(KERN_INFO "%s:%s Exit on line %d\n",
3666 dev->name,__FUNCTION__,__LINE__);
3667 #endif
3668 CLAW_DBF_TEXT(4,trace,"StRdExit");
3669 return;
3670 } /* end of claw_strt_read */
3671
3672 /*-------------------------------------------------------------------*
3673 * claw_strt_out_IO *
3674 * *
3675 *--------------------------------------------------------------------*/
3676
3677 static void
3678 claw_strt_out_IO( struct net_device *dev )
3679 {
3680 int rc = 0;
3681 unsigned long parm;
3682 struct claw_privbk *privptr;
3683 struct chbk *p_ch;
3684 struct ccwbk *p_first_ccw;
3685
3686 #ifdef FUNCTRACE
3687 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3688 #endif
3689 if (!dev) {
3690 return;
3691 }
3692 privptr=(struct claw_privbk *)dev->priv;
3693 p_ch=&privptr->channel[WRITE];
3694
3695 #ifdef DEBUGMSG
3696 printk(KERN_INFO "%s:%s state-%02x\n" ,
3697 dev->name,__FUNCTION__,p_ch->claw_state);
3698 #endif
3699 CLAW_DBF_TEXT(4,trace,"strt_io");
3700 p_first_ccw=privptr->p_write_active_first;
3701
3702 if (p_ch->claw_state == CLAW_STOP)
3703 return;
3704 if (p_first_ccw == NULL) {
3705 #ifdef FUNCTRACE
3706 printk(KERN_INFO "%s:%s Exit on line %d\n",
3707 dev->name,__FUNCTION__,__LINE__);
3708 #endif
3709 return;
3710 }
3711 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
3712 parm = (unsigned long) p_ch;
3713 #ifdef DEBUGMSG
3714 printk(KERN_INFO "%s:%s do_io \n" ,dev->name,__FUNCTION__);
3715 dumpit((char *)p_first_ccw, sizeof(struct ccwbk));
3716 #endif
3717 CLAW_DBF_TEXT(2,trace,"StWrtIO");
3718 rc = ccw_device_start (p_ch->cdev,&p_first_ccw->write, parm,
3719 0xff, 0);
3720 if (rc != 0) {
3721 ccw_check_return_code(p_ch->cdev, rc);
3722 }
3723 }
3724 dev->trans_start = jiffies;
3725 #ifdef FUNCTRACE
3726 printk(KERN_INFO "%s:%s Exit on line %d\n",
3727 dev->name,__FUNCTION__,__LINE__);
3728 #endif
3729
3730 return;
3731 } /* end of claw_strt_out_IO */
3732
3733 /*-------------------------------------------------------------------*
3734 * Free write buffers *
3735 * *
3736 *--------------------------------------------------------------------*/
3737
3738 static void
3739 claw_free_wrt_buf( struct net_device *dev )
3740 {
3741
3742 struct claw_privbk *privptr=(struct claw_privbk *)dev->priv;
3743 struct ccwbk*p_first_ccw;
3744 struct ccwbk*p_last_ccw;
3745 struct ccwbk*p_this_ccw;
3746 struct ccwbk*p_next_ccw;
3747 #ifdef IOTRACE
3748 struct ccwbk*p_buf;
3749 #endif
3750 #ifdef FUNCTRACE
3751 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3752 printk(KERN_INFO "%s: free count = %d variable dev =\n",
3753 dev->name,privptr->write_free_count);
3754 #endif
3755 CLAW_DBF_TEXT(4,trace,"freewrtb");
3756 /* scan the write queue to free any completed write packets */
3757 p_first_ccw=NULL;
3758 p_last_ccw=NULL;
3759 #ifdef IOTRACE
3760 printk(KERN_INFO "%s: Dump current CCW chain \n",dev->name );
3761 p_buf=privptr->p_write_active_first;
3762 while (p_buf!=NULL) {
3763 dumpit((char *)p_buf, sizeof(struct ccwbk));
3764 p_buf=p_buf->next;
3765 }
3766 if (p_buf==NULL) {
3767 printk(KERN_INFO "%s: privptr->p_write_"
3768 "active_first==NULL\n",dev->name );
3769 }
3770 p_buf=(struct ccwbk*)privptr->p_end_ccw;
3771 dumpit((char *)p_buf, sizeof(struct endccw));
3772 #endif
3773 p_this_ccw=privptr->p_write_active_first;
3774 while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
3775 {
3776 p_next_ccw = p_this_ccw->next;
3777 if (((p_next_ccw!=NULL) &&
3778 (p_next_ccw->header.flag!=CLAW_PENDING)) ||
3779 ((p_this_ccw == privptr->p_write_active_last) &&
3780 (p_this_ccw->header.flag!=CLAW_PENDING))) {
3781 /* The next CCW is OK or this is */
3782 /* the last CCW...free it @A1A */
3783 privptr->p_write_active_first=p_this_ccw->next;
3784 p_this_ccw->header.flag=CLAW_PENDING;
3785 p_this_ccw->next=privptr->p_write_free_chain;
3786 privptr->p_write_free_chain=p_this_ccw;
3787 ++privptr->write_free_count;
3788 privptr->stats.tx_bytes+= p_this_ccw->write.count;
3789 p_this_ccw=privptr->p_write_active_first;
3790 privptr->stats.tx_packets++;
3791 }
3792 else {
3793 break;
3794 }
3795 }
3796 if (privptr->write_free_count!=0) {
3797 claw_clearbit_busy(TB_NOBUFFER,dev);
3798 }
3799 /* whole chain removed? */
3800 if (privptr->p_write_active_first==NULL) {
3801 privptr->p_write_active_last=NULL;
3802 #ifdef DEBUGMSG
3803 printk(KERN_INFO "%s:%s p_write_"
3804 "active_first==NULL\n",dev->name,__FUNCTION__);
3805 #endif
3806 }
3807 #ifdef IOTRACE
3808 printk(KERN_INFO "%s: Dump arranged CCW chain \n",dev->name );
3809 p_buf=privptr->p_write_active_first;
3810 while (p_buf!=NULL) {
3811 dumpit((char *)p_buf, sizeof(struct ccwbk));
3812 p_buf=p_buf->next;
3813 }
3814 if (p_buf==NULL) {
3815 printk(KERN_INFO "%s: privptr->p_write_active_"
3816 "first==NULL\n",dev->name );
3817 }
3818 p_buf=(struct ccwbk*)privptr->p_end_ccw;
3819 dumpit((char *)p_buf, sizeof(struct endccw));
3820 #endif
3821
3822 CLAW_DBF_TEXT_(4,trace,"FWC=%d",privptr->write_free_count);
3823 #ifdef FUNCTRACE
3824 printk(KERN_INFO "%s:%s Exit on line %d free_count =%d\n",
3825 dev->name,__FUNCTION__, __LINE__,privptr->write_free_count);
3826 #endif
3827 return;
3828 }
3829
3830 /*-------------------------------------------------------------------*
3831 * claw free netdevice *
3832 * *
3833 *--------------------------------------------------------------------*/
3834 static void
3835 claw_free_netdevice(struct net_device * dev, int free_dev)
3836 {
3837 struct claw_privbk *privptr;
3838 #ifdef FUNCTRACE
3839 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3840 #endif
3841 CLAW_DBF_TEXT(2,setup,"free_dev");
3842
3843 if (!dev)
3844 return;
3845 CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
3846 privptr = dev->priv;
3847 if (dev->flags & IFF_RUNNING)
3848 claw_release(dev);
3849 if (privptr) {
3850 privptr->channel[READ].ndev = NULL; /* say it's free */
3851 }
3852 dev->priv=NULL;
3853 #ifdef MODULE
3854 if (free_dev) {
3855 free_netdev(dev);
3856 }
3857 #endif
3858 CLAW_DBF_TEXT(2,setup,"feee_ok");
3859 #ifdef FUNCTRACE
3860 printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
3861 #endif
3862 }
3863
3864 /**
3865 * Claw init netdevice
3866 * Initialize everything of the net device except the name and the
3867 * channel structs.
3868 */
3869 static void
3870 claw_init_netdevice(struct net_device * dev)
3871 {
3872 #ifdef FUNCTRACE
3873 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3874 #endif
3875 CLAW_DBF_TEXT(2,setup,"init_dev");
3876 CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
3877 if (!dev) {
3878 printk(KERN_WARNING "claw:%s BAD Device exit line %d\n",
3879 __FUNCTION__,__LINE__);
3880 CLAW_DBF_TEXT(2,setup,"baddev");
3881 return;
3882 }
3883 dev->mtu = CLAW_DEFAULT_MTU_SIZE;
3884 dev->hard_start_xmit = claw_tx;
3885 dev->open = claw_open;
3886 dev->stop = claw_release;
3887 dev->get_stats = claw_stats;
3888 dev->change_mtu = claw_change_mtu;
3889 dev->hard_header_len = 0;
3890 dev->addr_len = 0;
3891 dev->type = ARPHRD_SLIP;
3892 dev->tx_queue_len = 1300;
3893 dev->flags = IFF_POINTOPOINT | IFF_NOARP;
3894 #ifdef FUNCTRACE
3895 printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
3896 #endif
3897 CLAW_DBF_TEXT(2,setup,"initok");
3898 return;
3899 }
3900
3901 /**
3902 * Init a new channel in the privptr->channel[i].
3903 *
3904 * @param cdev The ccw_device to be added.
3905 *
3906 * @return 0 on success, !0 on error.
3907 */
3908 static int
3909 add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
3910 {
3911 struct chbk *p_ch;
3912 struct ccw_dev_id dev_id;
3913
3914 #ifdef FUNCTRACE
3915 printk(KERN_INFO "%s:%s Enter\n",cdev->dev.bus_id,__FUNCTION__);
3916 #endif
3917 CLAW_DBF_TEXT_(2,setup,"%s",cdev->dev.bus_id);
3918 privptr->channel[i].flag = i+1; /* Read is 1 Write is 2 */
3919 p_ch = &privptr->channel[i];
3920 p_ch->cdev = cdev;
3921 snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", cdev->dev.bus_id);
3922 ccw_device_get_id(cdev, &dev_id);
3923 p_ch->devno = dev_id.devno;
3924 if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
3925 printk(KERN_WARNING "%s Out of memory in %s for irb\n",
3926 p_ch->id,__FUNCTION__);
3927 #ifdef FUNCTRACE
3928 printk(KERN_INFO "%s:%s Exit on line %d\n",
3929 p_ch->id,__FUNCTION__,__LINE__);
3930 #endif
3931 return -ENOMEM;
3932 }
3933 #ifdef FUNCTRACE
3934 printk(KERN_INFO "%s:%s Exit on line %d\n",
3935 cdev->dev.bus_id,__FUNCTION__,__LINE__);
3936 #endif
3937 return 0;
3938 }
3939
3940
3941 /**
3942 *
3943 * Setup an interface.
3944 *
3945 * @param cgdev Device to be setup.
3946 *
3947 * @returns 0 on success, !0 on failure.
3948 */
3949 static int
3950 claw_new_device(struct ccwgroup_device *cgdev)
3951 {
3952 struct claw_privbk *privptr;
3953 struct claw_env *p_env;
3954 struct net_device *dev;
3955 int ret;
3956 struct ccw_dev_id dev_id;
3957
3958 pr_debug("%s() called\n", __FUNCTION__);
3959 printk(KERN_INFO "claw: add for %s\n",cgdev->cdev[READ]->dev.bus_id);
3960 CLAW_DBF_TEXT(2,setup,"new_dev");
3961 privptr = cgdev->dev.driver_data;
3962 cgdev->cdev[READ]->dev.driver_data = privptr;
3963 cgdev->cdev[WRITE]->dev.driver_data = privptr;
3964 if (!privptr)
3965 return -ENODEV;
3966 p_env = privptr->p_env;
3967 ccw_device_get_id(cgdev->cdev[READ], &dev_id);
3968 p_env->devno[READ] = dev_id.devno;
3969 ccw_device_get_id(cgdev->cdev[WRITE], &dev_id);
3970 p_env->devno[WRITE] = dev_id.devno;
3971 ret = add_channel(cgdev->cdev[0],0,privptr);
3972 if (ret == 0)
3973 ret = add_channel(cgdev->cdev[1],1,privptr);
3974 if (ret != 0) {
3975 printk(KERN_WARNING
3976 "add channel failed "
3977 "with ret = %d\n", ret);
3978 goto out;
3979 }
3980 ret = ccw_device_set_online(cgdev->cdev[READ]);
3981 if (ret != 0) {
3982 printk(KERN_WARNING
3983 "claw: ccw_device_set_online %s READ failed "
3984 "with ret = %d\n",cgdev->cdev[READ]->dev.bus_id,ret);
3985 goto out;
3986 }
3987 ret = ccw_device_set_online(cgdev->cdev[WRITE]);
3988 if (ret != 0) {
3989 printk(KERN_WARNING
3990 "claw: ccw_device_set_online %s WRITE failed "
3991 "with ret = %d\n",cgdev->cdev[WRITE]->dev.bus_id, ret);
3992 goto out;
3993 }
3994 dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
3995 if (!dev) {
3996 printk(KERN_WARNING "%s:alloc_netdev failed\n",__FUNCTION__);
3997 goto out;
3998 }
3999 dev->priv = privptr;
4000 cgdev->dev.driver_data = privptr;
4001 cgdev->cdev[READ]->dev.driver_data = privptr;
4002 cgdev->cdev[WRITE]->dev.driver_data = privptr;
4003 /* sysfs magic */
4004 SET_NETDEV_DEV(dev, &cgdev->dev);
4005 if (register_netdev(dev) != 0) {
4006 claw_free_netdevice(dev, 1);
4007 CLAW_DBF_TEXT(2,trace,"regfail");
4008 goto out;
4009 }
4010 dev->flags &=~IFF_RUNNING;
4011 if (privptr->buffs_alloc == 0) {
4012 ret=init_ccw_bk(dev);
4013 if (ret !=0) {
4014 printk(KERN_WARNING
4015 "claw: init_ccw_bk failed with ret=%d\n", ret);
4016 unregister_netdev(dev);
4017 claw_free_netdevice(dev,1);
4018 CLAW_DBF_TEXT(2,trace,"ccwmem");
4019 goto out;
4020 }
4021 }
4022 privptr->channel[READ].ndev = dev;
4023 privptr->channel[WRITE].ndev = dev;
4024 privptr->p_env->ndev = dev;
4025
4026 printk(KERN_INFO "%s:readsize=%d writesize=%d "
4027 "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
4028 dev->name, p_env->read_size,
4029 p_env->write_size, p_env->read_buffers,
4030 p_env->write_buffers, p_env->devno[READ],
4031 p_env->devno[WRITE]);
4032 printk(KERN_INFO "%s:host_name:%.8s, adapter_name "
4033 ":%.8s api_type: %.8s\n",
4034 dev->name, p_env->host_name,
4035 p_env->adapter_name , p_env->api_type);
4036 return 0;
4037 out:
4038 ccw_device_set_offline(cgdev->cdev[1]);
4039 ccw_device_set_offline(cgdev->cdev[0]);
4040
4041 return -ENODEV;
4042 }
4043
4044 static void
4045 claw_purge_skb_queue(struct sk_buff_head *q)
4046 {
4047 struct sk_buff *skb;
4048
4049 CLAW_DBF_TEXT(4,trace,"purgque");
4050
4051 while ((skb = skb_dequeue(q))) {
4052 atomic_dec(&skb->users);
4053 dev_kfree_skb_any(skb);
4054 }
4055 }
4056
4057 /**
4058 * Shutdown an interface.
4059 *
4060 * @param cgdev Device to be shut down.
4061 *
4062 * @returns 0 on success, !0 on failure.
4063 */
4064 static int
4065 claw_shutdown_device(struct ccwgroup_device *cgdev)
4066 {
4067 struct claw_privbk *priv;
4068 struct net_device *ndev;
4069 int ret;
4070
4071 pr_debug("%s() called\n", __FUNCTION__);
4072 CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
4073 priv = cgdev->dev.driver_data;
4074 if (!priv)
4075 return -ENODEV;
4076 ndev = priv->channel[READ].ndev;
4077 if (ndev) {
4078 /* Close the device */
4079 printk(KERN_INFO
4080 "%s: shuting down \n",ndev->name);
4081 if (ndev->flags & IFF_RUNNING)
4082 ret = claw_release(ndev);
4083 ndev->flags &=~IFF_RUNNING;
4084 unregister_netdev(ndev);
4085 ndev->priv = NULL; /* cgdev data, not ndev's to free */
4086 claw_free_netdevice(ndev, 1);
4087 priv->channel[READ].ndev = NULL;
4088 priv->channel[WRITE].ndev = NULL;
4089 priv->p_env->ndev = NULL;
4090 }
4091 ccw_device_set_offline(cgdev->cdev[1]);
4092 ccw_device_set_offline(cgdev->cdev[0]);
4093 return 0;
4094 }
4095
4096 static void
4097 claw_remove_device(struct ccwgroup_device *cgdev)
4098 {
4099 struct claw_privbk *priv;
4100
4101 pr_debug("%s() called\n", __FUNCTION__);
4102 CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
4103 priv = cgdev->dev.driver_data;
4104 if (!priv) {
4105 printk(KERN_WARNING "claw: %s() no Priv exiting\n",__FUNCTION__);
4106 return;
4107 }
4108 printk(KERN_INFO "claw: %s() called %s will be removed.\n",
4109 __FUNCTION__,cgdev->cdev[0]->dev.bus_id);
4110 if (cgdev->state == CCWGROUP_ONLINE)
4111 claw_shutdown_device(cgdev);
4112 claw_remove_files(&cgdev->dev);
4113 kfree(priv->p_mtc_envelope);
4114 priv->p_mtc_envelope=NULL;
4115 kfree(priv->p_env);
4116 priv->p_env=NULL;
4117 kfree(priv->channel[0].irb);
4118 priv->channel[0].irb=NULL;
4119 kfree(priv->channel[1].irb);
4120 priv->channel[1].irb=NULL;
4121 kfree(priv);
4122 cgdev->dev.driver_data=NULL;
4123 cgdev->cdev[READ]->dev.driver_data = NULL;
4124 cgdev->cdev[WRITE]->dev.driver_data = NULL;
4125 put_device(&cgdev->dev);
4126 }
4127
4128
4129 /*
4130 * sysfs attributes
4131 */
4132 static ssize_t
4133 claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
4134 {
4135 struct claw_privbk *priv;
4136 struct claw_env * p_env;
4137
4138 priv = dev->driver_data;
4139 if (!priv)
4140 return -ENODEV;
4141 p_env = priv->p_env;
4142 return sprintf(buf, "%s\n",p_env->host_name);
4143 }
4144
4145 static ssize_t
4146 claw_hname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4147 {
4148 struct claw_privbk *priv;
4149 struct claw_env * p_env;
4150
4151 priv = dev->driver_data;
4152 if (!priv)
4153 return -ENODEV;
4154 p_env = priv->p_env;
4155 if (count > MAX_NAME_LEN+1)
4156 return -EINVAL;
4157 memset(p_env->host_name, 0x20, MAX_NAME_LEN);
4158 strncpy(p_env->host_name,buf, count);
4159 p_env->host_name[count-1] = 0x20; /* clear extra 0x0a */
4160 p_env->host_name[MAX_NAME_LEN] = 0x00;
4161 CLAW_DBF_TEXT(2,setup,"HstnSet");
4162 CLAW_DBF_TEXT_(2,setup,"%s",p_env->host_name);
4163
4164 return count;
4165 }
4166
4167 static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
4168
4169 static ssize_t
4170 claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
4171 {
4172 struct claw_privbk *priv;
4173 struct claw_env * p_env;
4174
4175 priv = dev->driver_data;
4176 if (!priv)
4177 return -ENODEV;
4178 p_env = priv->p_env;
4179 return sprintf(buf, "%s\n",p_env->adapter_name);
4180 }
4181
4182 static ssize_t
4183 claw_adname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4184 {
4185 struct claw_privbk *priv;
4186 struct claw_env * p_env;
4187
4188 priv = dev->driver_data;
4189 if (!priv)
4190 return -ENODEV;
4191 p_env = priv->p_env;
4192 if (count > MAX_NAME_LEN+1)
4193 return -EINVAL;
4194 memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
4195 strncpy(p_env->adapter_name,buf, count);
4196 p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
4197 p_env->adapter_name[MAX_NAME_LEN] = 0x00;
4198 CLAW_DBF_TEXT(2,setup,"AdnSet");
4199 CLAW_DBF_TEXT_(2,setup,"%s",p_env->adapter_name);
4200
4201 return count;
4202 }
4203
4204 static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
4205
4206 static ssize_t
4207 claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
4208 {
4209 struct claw_privbk *priv;
4210 struct claw_env * p_env;
4211
4212 priv = dev->driver_data;
4213 if (!priv)
4214 return -ENODEV;
4215 p_env = priv->p_env;
4216 return sprintf(buf, "%s\n",
4217 p_env->api_type);
4218 }
4219
4220 static ssize_t
4221 claw_apname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4222 {
4223 struct claw_privbk *priv;
4224 struct claw_env * p_env;
4225
4226 priv = dev->driver_data;
4227 if (!priv)
4228 return -ENODEV;
4229 p_env = priv->p_env;
4230 if (count > MAX_NAME_LEN+1)
4231 return -EINVAL;
4232 memset(p_env->api_type, 0x20, MAX_NAME_LEN);
4233 strncpy(p_env->api_type,buf, count);
4234 p_env->api_type[count-1] = 0x20; /* we get a loose 0x0a */
4235 p_env->api_type[MAX_NAME_LEN] = 0x00;
4236 if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
4237 p_env->read_size=DEF_PACK_BUFSIZE;
4238 p_env->write_size=DEF_PACK_BUFSIZE;
4239 p_env->packing=PACKING_ASK;
4240 CLAW_DBF_TEXT(2,setup,"PACKING");
4241 }
4242 else {
4243 p_env->packing=0;
4244 p_env->read_size=CLAW_FRAME_SIZE;
4245 p_env->write_size=CLAW_FRAME_SIZE;
4246 CLAW_DBF_TEXT(2,setup,"ApiSet");
4247 }
4248 CLAW_DBF_TEXT_(2,setup,"%s",p_env->api_type);
4249 return count;
4250 }
4251
4252 static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
4253
4254 static ssize_t
4255 claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
4256 {
4257 struct claw_privbk *priv;
4258 struct claw_env * p_env;
4259
4260 priv = dev->driver_data;
4261 if (!priv)
4262 return -ENODEV;
4263 p_env = priv->p_env;
4264 return sprintf(buf, "%d\n", p_env->write_buffers);
4265 }
4266
4267 static ssize_t
4268 claw_wbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4269 {
4270 struct claw_privbk *priv;
4271 struct claw_env * p_env;
4272 int nnn,max;
4273
4274 priv = dev->driver_data;
4275 if (!priv)
4276 return -ENODEV;
4277 p_env = priv->p_env;
4278 sscanf(buf, "%i", &nnn);
4279 if (p_env->packing) {
4280 max = 64;
4281 }
4282 else {
4283 max = 512;
4284 }
4285 if ((nnn > max ) || (nnn < 2))
4286 return -EINVAL;
4287 p_env->write_buffers = nnn;
4288 CLAW_DBF_TEXT(2,setup,"Wbufset");
4289 CLAW_DBF_TEXT_(2,setup,"WB=%d",p_env->write_buffers);
4290 return count;
4291 }
4292
4293 static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
4294
4295 static ssize_t
4296 claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
4297 {
4298 struct claw_privbk *priv;
4299 struct claw_env * p_env;
4300
4301 priv = dev->driver_data;
4302 if (!priv)
4303 return -ENODEV;
4304 p_env = priv->p_env;
4305 return sprintf(buf, "%d\n", p_env->read_buffers);
4306 }
4307
4308 static ssize_t
4309 claw_rbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4310 {
4311 struct claw_privbk *priv;
4312 struct claw_env *p_env;
4313 int nnn,max;
4314
4315 priv = dev->driver_data;
4316 if (!priv)
4317 return -ENODEV;
4318 p_env = priv->p_env;
4319 sscanf(buf, "%i", &nnn);
4320 if (p_env->packing) {
4321 max = 64;
4322 }
4323 else {
4324 max = 512;
4325 }
4326 if ((nnn > max ) || (nnn < 2))
4327 return -EINVAL;
4328 p_env->read_buffers = nnn;
4329 CLAW_DBF_TEXT(2,setup,"Rbufset");
4330 CLAW_DBF_TEXT_(2,setup,"RB=%d",p_env->read_buffers);
4331 return count;
4332 }
4333
4334 static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
4335
4336 static struct attribute *claw_attr[] = {
4337 &dev_attr_read_buffer.attr,
4338 &dev_attr_write_buffer.attr,
4339 &dev_attr_adapter_name.attr,
4340 &dev_attr_api_type.attr,
4341 &dev_attr_host_name.attr,
4342 NULL,
4343 };
4344
4345 static struct attribute_group claw_attr_group = {
4346 .attrs = claw_attr,
4347 };
4348
4349 static int
4350 claw_add_files(struct device *dev)
4351 {
4352 pr_debug("%s() called\n", __FUNCTION__);
4353 CLAW_DBF_TEXT(2,setup,"add_file");
4354 return sysfs_create_group(&dev->kobj, &claw_attr_group);
4355 }
4356
4357 static void
4358 claw_remove_files(struct device *dev)
4359 {
4360 pr_debug("%s() called\n", __FUNCTION__);
4361 CLAW_DBF_TEXT(2,setup,"rem_file");
4362 sysfs_remove_group(&dev->kobj, &claw_attr_group);
4363 }
4364
4365 /*--------------------------------------------------------------------*
4366 * claw_init and cleanup *
4367 *---------------------------------------------------------------------*/
4368
4369 static void __exit
4370 claw_cleanup(void)
4371 {
4372 unregister_cu3088_discipline(&claw_group_driver);
4373 claw_unregister_debug_facility();
4374 printk(KERN_INFO "claw: Driver unloaded\n");
4375
4376 }
4377
4378 /**
4379 * Initialize module.
4380 * This is called just after the module is loaded.
4381 *
4382 * @return 0 on success, !0 on error.
4383 */
4384 static int __init
4385 claw_init(void)
4386 {
4387 int ret = 0;
4388 printk(KERN_INFO "claw: starting driver\n");
4389
4390 #ifdef FUNCTRACE
4391 printk(KERN_INFO "claw: %s() enter \n",__FUNCTION__);
4392 #endif
4393 ret = claw_register_debug_facility();
4394 if (ret) {
4395 printk(KERN_WARNING "claw: %s() debug_register failed %d\n",
4396 __FUNCTION__,ret);
4397 return ret;
4398 }
4399 CLAW_DBF_TEXT(2,setup,"init_mod");
4400 ret = register_cu3088_discipline(&claw_group_driver);
4401 if (ret) {
4402 claw_unregister_debug_facility();
4403 printk(KERN_WARNING "claw; %s() cu3088 register failed %d\n",
4404 __FUNCTION__,ret);
4405 }
4406 #ifdef FUNCTRACE
4407 printk(KERN_INFO "claw: %s() exit \n",__FUNCTION__);
4408 #endif
4409 return ret;
4410 }
4411
4412 module_init(claw_init);
4413 module_exit(claw_cleanup);
4414
4415
4416
4417 /*--------------------------------------------------------------------*
4418 * End of File *
4419 *---------------------------------------------------------------------*/
4420
4421
Linux kernel - Deliverables
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