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[mirror_ubuntu-zesty-kernel.git] / drivers / isdn / capi / capi.c
1 /* $Id: capi.c,v 1.1.2.7 2004/04/28 09:48:59 armin Exp $
2 *
3 * CAPI 2.0 Interface for Linux
4 *
5 * Copyright 1996 by Carsten Paeth <calle@calle.de>
6 *
7 * This software may be used and distributed according to the terms
8 * of the GNU General Public License, incorporated herein by reference.
9 *
10 */
11
12 #include <linux/module.h>
13 #include <linux/errno.h>
14 #include <linux/kernel.h>
15 #include <linux/major.h>
16 #include <linux/sched.h>
17 #include <linux/slab.h>
18 #include <linux/fcntl.h>
19 #include <linux/fs.h>
20 #include <linux/signal.h>
21 #include <linux/mutex.h>
22 #include <linux/mm.h>
23 #include <linux/smp_lock.h>
24 #include <linux/timer.h>
25 #include <linux/wait.h>
26 #include <linux/tty.h>
27 #include <linux/netdevice.h>
28 #include <linux/ppp_defs.h>
29 #include <linux/if_ppp.h>
30 #include <linux/skbuff.h>
31 #include <linux/proc_fs.h>
32 #include <linux/seq_file.h>
33 #include <linux/poll.h>
34 #include <linux/capi.h>
35 #include <linux/kernelcapi.h>
36 #include <linux/init.h>
37 #include <linux/device.h>
38 #include <linux/moduleparam.h>
39 #include <linux/isdn/capiutil.h>
40 #include <linux/isdn/capicmd.h>
41
42 #include "capifs.h"
43
44 MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface");
45 MODULE_AUTHOR("Carsten Paeth");
46 MODULE_LICENSE("GPL");
47
48 #undef _DEBUG_TTYFUNCS /* call to tty_driver */
49 #undef _DEBUG_DATAFLOW /* data flow */
50
51 /* -------- driver information -------------------------------------- */
52
53 static struct class *capi_class;
54 static int capi_major = 68; /* allocated */
55
56 module_param_named(major, capi_major, uint, 0);
57
58 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
59 #define CAPINC_NR_PORTS 32
60 #define CAPINC_MAX_PORTS 256
61
62 static int capi_ttyminors = CAPINC_NR_PORTS;
63
64 module_param_named(ttyminors, capi_ttyminors, uint, 0);
65 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
66
67 /* -------- defines ------------------------------------------------- */
68
69 #define CAPINC_MAX_RECVQUEUE 10
70 #define CAPINC_MAX_SENDQUEUE 10
71 #define CAPI_MAX_BLKSIZE 2048
72
73 /* -------- data structures ----------------------------------------- */
74
75 struct capidev;
76 struct capincci;
77 struct capiminor;
78
79 struct datahandle_queue {
80 struct list_head list;
81 u16 datahandle;
82 };
83
84 struct capiminor {
85 struct kref kref;
86
87 unsigned int minor;
88 struct dentry *capifs_dentry;
89
90 struct capi20_appl *ap;
91 u32 ncci;
92 u16 datahandle;
93 u16 msgid;
94
95 struct tty_port port;
96 int ttyinstop;
97 int ttyoutstop;
98 struct sk_buff *ttyskb;
99
100 struct sk_buff_head inqueue;
101 int inbytes;
102 struct sk_buff_head outqueue;
103 int outbytes;
104
105 /* transmit path */
106 struct list_head ackqueue;
107 int nack;
108 spinlock_t ackqlock;
109 };
110
111 /* FIXME: The following lock is a sledgehammer-workaround to a
112 * locking issue with the capiminor (and maybe other) data structure(s).
113 * Access to this data is done in a racy way and crashes the machine with
114 * a FritzCard DSL driver; sooner or later. This is a workaround
115 * which trades scalability vs stability, so it doesn't crash the kernel anymore.
116 * The correct (and scalable) fix for the issue seems to require
117 * an API change to the drivers... . */
118 static DEFINE_SPINLOCK(workaround_lock);
119
120 struct capincci {
121 struct list_head list;
122 u32 ncci;
123 struct capidev *cdev;
124 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
125 struct capiminor *minorp;
126 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
127 };
128
129 struct capidev {
130 struct list_head list;
131 struct capi20_appl ap;
132 u16 errcode;
133 unsigned userflags;
134
135 struct sk_buff_head recvqueue;
136 wait_queue_head_t recvwait;
137
138 struct list_head nccis;
139
140 struct mutex lock;
141 };
142
143 /* -------- global variables ---------------------------------------- */
144
145 static DEFINE_MUTEX(capidev_list_lock);
146 static LIST_HEAD(capidev_list);
147
148 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
149
150 static DEFINE_SPINLOCK(capiminors_lock);
151 static struct capiminor **capiminors;
152
153 static struct tty_driver *capinc_tty_driver;
154
155 /* -------- datahandles --------------------------------------------- */
156
157 static int capiminor_add_ack(struct capiminor *mp, u16 datahandle)
158 {
159 struct datahandle_queue *n;
160 unsigned long flags;
161
162 n = kmalloc(sizeof(*n), GFP_ATOMIC);
163 if (unlikely(!n)) {
164 printk(KERN_ERR "capi: alloc datahandle failed\n");
165 return -1;
166 }
167 n->datahandle = datahandle;
168 INIT_LIST_HEAD(&n->list);
169 spin_lock_irqsave(&mp->ackqlock, flags);
170 list_add_tail(&n->list, &mp->ackqueue);
171 mp->nack++;
172 spin_unlock_irqrestore(&mp->ackqlock, flags);
173 return 0;
174 }
175
176 static int capiminor_del_ack(struct capiminor *mp, u16 datahandle)
177 {
178 struct datahandle_queue *p, *tmp;
179 unsigned long flags;
180
181 spin_lock_irqsave(&mp->ackqlock, flags);
182 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
183 if (p->datahandle == datahandle) {
184 list_del(&p->list);
185 kfree(p);
186 mp->nack--;
187 spin_unlock_irqrestore(&mp->ackqlock, flags);
188 return 0;
189 }
190 }
191 spin_unlock_irqrestore(&mp->ackqlock, flags);
192 return -1;
193 }
194
195 static void capiminor_del_all_ack(struct capiminor *mp)
196 {
197 struct datahandle_queue *p, *tmp;
198 unsigned long flags;
199
200 spin_lock_irqsave(&mp->ackqlock, flags);
201 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
202 list_del(&p->list);
203 kfree(p);
204 mp->nack--;
205 }
206 spin_unlock_irqrestore(&mp->ackqlock, flags);
207 }
208
209
210 /* -------- struct capiminor ---------------------------------------- */
211
212 static const struct tty_port_operations capiminor_port_ops; /* we have none */
213
214 static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci)
215 {
216 struct capiminor *mp;
217 struct device *dev;
218 unsigned int minor;
219
220 mp = kzalloc(sizeof(*mp), GFP_KERNEL);
221 if (!mp) {
222 printk(KERN_ERR "capi: can't alloc capiminor\n");
223 return NULL;
224 }
225
226 kref_init(&mp->kref);
227
228 mp->ap = ap;
229 mp->ncci = ncci;
230 mp->msgid = 0;
231 INIT_LIST_HEAD(&mp->ackqueue);
232 spin_lock_init(&mp->ackqlock);
233
234 skb_queue_head_init(&mp->inqueue);
235 skb_queue_head_init(&mp->outqueue);
236
237 tty_port_init(&mp->port);
238 mp->port.ops = &capiminor_port_ops;
239
240 /* Allocate the least unused minor number. */
241 spin_lock(&capiminors_lock);
242 for (minor = 0; minor < capi_ttyminors; minor++)
243 if (!capiminors[minor]) {
244 capiminors[minor] = mp;
245 break;
246 }
247 spin_unlock(&capiminors_lock);
248
249 if (minor == capi_ttyminors) {
250 printk(KERN_NOTICE "capi: out of minors\n");
251 goto err_out1;
252 }
253
254 mp->minor = minor;
255
256 dev = tty_register_device(capinc_tty_driver, minor, NULL);
257 if (IS_ERR(dev))
258 goto err_out2;
259
260 return mp;
261
262 err_out2:
263 spin_lock(&capiminors_lock);
264 capiminors[minor] = NULL;
265 spin_unlock(&capiminors_lock);
266
267 err_out1:
268 kfree(mp);
269 return NULL;
270 }
271
272 static void capiminor_destroy(struct kref *kref)
273 {
274 struct capiminor *mp = container_of(kref, struct capiminor, kref);
275
276 kfree_skb(mp->ttyskb);
277 skb_queue_purge(&mp->inqueue);
278 skb_queue_purge(&mp->outqueue);
279 capiminor_del_all_ack(mp);
280 kfree(mp);
281 }
282
283 static struct capiminor *capiminor_get(unsigned int minor)
284 {
285 struct capiminor *mp;
286
287 spin_lock(&capiminors_lock);
288 mp = capiminors[minor];
289 if (mp)
290 kref_get(&mp->kref);
291 spin_unlock(&capiminors_lock);
292
293 return mp;
294 }
295
296 static inline void capiminor_put(struct capiminor *mp)
297 {
298 kref_put(&mp->kref, capiminor_destroy);
299 }
300
301 static void capiminor_free(struct capiminor *mp)
302 {
303 tty_unregister_device(capinc_tty_driver, mp->minor);
304
305 spin_lock(&capiminors_lock);
306 capiminors[mp->minor] = NULL;
307 spin_unlock(&capiminors_lock);
308
309 capiminor_put(mp);
310 }
311
312 /* -------- struct capincci ----------------------------------------- */
313
314 static void capincci_alloc_minor(struct capidev *cdev, struct capincci *np)
315 {
316 struct capiminor *mp;
317 dev_t device;
318
319 if (!(cdev->userflags & CAPIFLAG_HIGHJACKING))
320 return;
321
322 mp = np->minorp = capiminor_alloc(&cdev->ap, np->ncci);
323 if (mp) {
324 device = MKDEV(capinc_tty_driver->major, mp->minor);
325 mp->capifs_dentry = capifs_new_ncci(mp->minor, device);
326 }
327 }
328
329 static void capincci_free_minor(struct capincci *np)
330 {
331 struct capiminor *mp = np->minorp;
332 struct tty_struct *tty;
333
334 if (mp) {
335 capifs_free_ncci(mp->capifs_dentry);
336
337 tty = tty_port_tty_get(&mp->port);
338 if (tty) {
339 tty_vhangup(tty);
340 tty_kref_put(tty);
341 }
342
343 capiminor_free(mp);
344 }
345 }
346
347 static inline unsigned int capincci_minor_opencount(struct capincci *np)
348 {
349 struct capiminor *mp = np->minorp;
350 unsigned int count = 0;
351 struct tty_struct *tty;
352
353 if (mp) {
354 tty = tty_port_tty_get(&mp->port);
355 if (tty) {
356 count = tty->count;
357 tty_kref_put(tty);
358 }
359 }
360 return count;
361 }
362
363 #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
364
365 static inline void
366 capincci_alloc_minor(struct capidev *cdev, struct capincci *np) { }
367 static inline void capincci_free_minor(struct capincci *np) { }
368
369 static inline unsigned int capincci_minor_opencount(struct capincci *np)
370 {
371 return 0;
372 }
373
374 #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
375
376 static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci)
377 {
378 struct capincci *np;
379
380 np = kzalloc(sizeof(*np), GFP_KERNEL);
381 if (!np)
382 return NULL;
383 np->ncci = ncci;
384 np->cdev = cdev;
385
386 capincci_alloc_minor(cdev, np);
387
388 list_add_tail(&np->list, &cdev->nccis);
389
390 return np;
391 }
392
393 static void capincci_free(struct capidev *cdev, u32 ncci)
394 {
395 struct capincci *np, *tmp;
396
397 list_for_each_entry_safe(np, tmp, &cdev->nccis, list)
398 if (ncci == 0xffffffff || np->ncci == ncci) {
399 capincci_free_minor(np);
400 list_del(&np->list);
401 kfree(np);
402 }
403 }
404
405 static struct capincci *capincci_find(struct capidev *cdev, u32 ncci)
406 {
407 struct capincci *np;
408
409 list_for_each_entry(np, &cdev->nccis, list)
410 if (np->ncci == ncci)
411 return np;
412 return NULL;
413 }
414
415 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
416 /* -------- handle data queue --------------------------------------- */
417
418 static struct sk_buff *
419 gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb)
420 {
421 struct sk_buff *nskb;
422 nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_ATOMIC);
423 if (nskb) {
424 u16 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4+4+2);
425 unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN);
426 capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN);
427 capimsg_setu16(s, 2, mp->ap->applid);
428 capimsg_setu8 (s, 4, CAPI_DATA_B3);
429 capimsg_setu8 (s, 5, CAPI_RESP);
430 capimsg_setu16(s, 6, mp->msgid++);
431 capimsg_setu32(s, 8, mp->ncci);
432 capimsg_setu16(s, 12, datahandle);
433 }
434 return nskb;
435 }
436
437 static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb)
438 {
439 struct tty_struct *tty;
440 struct sk_buff *nskb;
441 int datalen;
442 u16 errcode, datahandle;
443 struct tty_ldisc *ld;
444 int ret = -1;
445
446 datalen = skb->len - CAPIMSG_LEN(skb->data);
447
448 tty = tty_port_tty_get(&mp->port);
449 if (!tty) {
450 #ifdef _DEBUG_DATAFLOW
451 printk(KERN_DEBUG "capi: currently no receiver\n");
452 #endif
453 return -1;
454 }
455
456 ld = tty_ldisc_ref(tty);
457 if (!ld)
458 goto out1;
459
460 if (ld->ops->receive_buf == NULL) {
461 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
462 printk(KERN_DEBUG "capi: ldisc has no receive_buf function\n");
463 #endif
464 goto out2;
465 }
466 if (mp->ttyinstop) {
467 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
468 printk(KERN_DEBUG "capi: recv tty throttled\n");
469 #endif
470 goto out2;
471 }
472 if (tty->receive_room < datalen) {
473 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
474 printk(KERN_DEBUG "capi: no room in tty\n");
475 #endif
476 goto out2;
477 }
478 if ((nskb = gen_data_b3_resp_for(mp, skb)) == NULL) {
479 printk(KERN_ERR "capi: gen_data_b3_resp failed\n");
480 goto out2;
481 }
482 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4);
483 errcode = capi20_put_message(mp->ap, nskb);
484 if (errcode != CAPI_NOERROR) {
485 printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n",
486 errcode);
487 kfree_skb(nskb);
488 goto out2;
489 }
490 (void)skb_pull(skb, CAPIMSG_LEN(skb->data));
491 #ifdef _DEBUG_DATAFLOW
492 printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldisc\n",
493 datahandle, skb->len);
494 #endif
495 ld->ops->receive_buf(tty, skb->data, NULL, skb->len);
496 kfree_skb(skb);
497 ret = 0;
498 out2:
499 tty_ldisc_deref(ld);
500 out1:
501 tty_kref_put(tty);
502 return ret;
503 }
504
505 static void handle_minor_recv(struct capiminor *mp)
506 {
507 struct sk_buff *skb;
508 while ((skb = skb_dequeue(&mp->inqueue)) != NULL) {
509 unsigned int len = skb->len;
510 mp->inbytes -= len;
511 if (handle_recv_skb(mp, skb) < 0) {
512 skb_queue_head(&mp->inqueue, skb);
513 mp->inbytes += len;
514 return;
515 }
516 }
517 }
518
519 static int handle_minor_send(struct capiminor *mp)
520 {
521 struct tty_struct *tty;
522 struct sk_buff *skb;
523 u16 len;
524 int count = 0;
525 u16 errcode;
526 u16 datahandle;
527
528 tty = tty_port_tty_get(&mp->port);
529 if (!tty)
530 return 0;
531
532 if (mp->ttyoutstop) {
533 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
534 printk(KERN_DEBUG "capi: send: tty stopped\n");
535 #endif
536 tty_kref_put(tty);
537 return 0;
538 }
539
540 while ((skb = skb_dequeue(&mp->outqueue)) != NULL) {
541 datahandle = mp->datahandle;
542 len = (u16)skb->len;
543 skb_push(skb, CAPI_DATA_B3_REQ_LEN);
544 memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
545 capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
546 capimsg_setu16(skb->data, 2, mp->ap->applid);
547 capimsg_setu8 (skb->data, 4, CAPI_DATA_B3);
548 capimsg_setu8 (skb->data, 5, CAPI_REQ);
549 capimsg_setu16(skb->data, 6, mp->msgid++);
550 capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */
551 capimsg_setu32(skb->data, 12, (u32)(long)skb->data);/* Data32 */
552 capimsg_setu16(skb->data, 16, len); /* Data length */
553 capimsg_setu16(skb->data, 18, datahandle);
554 capimsg_setu16(skb->data, 20, 0); /* Flags */
555
556 if (capiminor_add_ack(mp, datahandle) < 0) {
557 skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
558 skb_queue_head(&mp->outqueue, skb);
559 tty_kref_put(tty);
560 return count;
561 }
562 errcode = capi20_put_message(mp->ap, skb);
563 if (errcode == CAPI_NOERROR) {
564 mp->datahandle++;
565 count++;
566 mp->outbytes -= len;
567 #ifdef _DEBUG_DATAFLOW
568 printk(KERN_DEBUG "capi: DATA_B3_REQ %u len=%u\n",
569 datahandle, len);
570 #endif
571 continue;
572 }
573 capiminor_del_ack(mp, datahandle);
574
575 if (errcode == CAPI_SENDQUEUEFULL) {
576 skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
577 skb_queue_head(&mp->outqueue, skb);
578 break;
579 }
580
581 /* ups, drop packet */
582 printk(KERN_ERR "capi: put_message = %x\n", errcode);
583 mp->outbytes -= len;
584 kfree_skb(skb);
585 }
586 tty_kref_put(tty);
587 return count;
588 }
589
590 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
591 /* -------- function called by lower level -------------------------- */
592
593 static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb)
594 {
595 struct capidev *cdev = ap->private;
596 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
597 struct tty_struct *tty;
598 struct capiminor *mp;
599 u16 datahandle;
600 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
601 struct capincci *np;
602 unsigned long flags;
603
604 mutex_lock(&cdev->lock);
605
606 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) {
607 u16 info = CAPIMSG_U16(skb->data, 12); // Info field
608 if ((info & 0xff00) == 0)
609 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
610 }
611 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND)
612 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
613
614 spin_lock_irqsave(&workaround_lock, flags);
615 if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) {
616 skb_queue_tail(&cdev->recvqueue, skb);
617 wake_up_interruptible(&cdev->recvwait);
618 goto unlock_out;
619 }
620
621 np = capincci_find(cdev, CAPIMSG_CONTROL(skb->data));
622 if (!np) {
623 printk(KERN_ERR "BUG: capi_signal: ncci not found\n");
624 skb_queue_tail(&cdev->recvqueue, skb);
625 wake_up_interruptible(&cdev->recvwait);
626 goto unlock_out;
627 }
628
629 #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE
630 skb_queue_tail(&cdev->recvqueue, skb);
631 wake_up_interruptible(&cdev->recvwait);
632
633 #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */
634
635 mp = np->minorp;
636 if (!mp) {
637 skb_queue_tail(&cdev->recvqueue, skb);
638 wake_up_interruptible(&cdev->recvwait);
639 goto unlock_out;
640 }
641 if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) {
642 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+4+2);
643 #ifdef _DEBUG_DATAFLOW
644 printk(KERN_DEBUG "capi_signal: DATA_B3_IND %u len=%d\n",
645 datahandle, skb->len-CAPIMSG_LEN(skb->data));
646 #endif
647 skb_queue_tail(&mp->inqueue, skb);
648 mp->inbytes += skb->len;
649 handle_minor_recv(mp);
650
651 } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) {
652
653 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4);
654 #ifdef _DEBUG_DATAFLOW
655 printk(KERN_DEBUG "capi_signal: DATA_B3_CONF %u 0x%x\n",
656 datahandle,
657 CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+2));
658 #endif
659 kfree_skb(skb);
660 (void)capiminor_del_ack(mp, datahandle);
661 tty = tty_port_tty_get(&mp->port);
662 if (tty) {
663 tty_wakeup(tty);
664 tty_kref_put(tty);
665 }
666 (void)handle_minor_send(mp);
667
668 } else {
669 /* ups, let capi application handle it :-) */
670 skb_queue_tail(&cdev->recvqueue, skb);
671 wake_up_interruptible(&cdev->recvwait);
672 }
673 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
674
675 unlock_out:
676 spin_unlock_irqrestore(&workaround_lock, flags);
677 mutex_unlock(&cdev->lock);
678 }
679
680 /* -------- file_operations for capidev ----------------------------- */
681
682 static ssize_t
683 capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
684 {
685 struct capidev *cdev = (struct capidev *)file->private_data;
686 struct sk_buff *skb;
687 size_t copied;
688 int err;
689
690 if (!cdev->ap.applid)
691 return -ENODEV;
692
693 skb = skb_dequeue(&cdev->recvqueue);
694 if (!skb) {
695 if (file->f_flags & O_NONBLOCK)
696 return -EAGAIN;
697 err = wait_event_interruptible(cdev->recvwait,
698 (skb = skb_dequeue(&cdev->recvqueue)));
699 if (err)
700 return err;
701 }
702 if (skb->len > count) {
703 skb_queue_head(&cdev->recvqueue, skb);
704 return -EMSGSIZE;
705 }
706 if (copy_to_user(buf, skb->data, skb->len)) {
707 skb_queue_head(&cdev->recvqueue, skb);
708 return -EFAULT;
709 }
710 copied = skb->len;
711
712 kfree_skb(skb);
713
714 return copied;
715 }
716
717 static ssize_t
718 capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
719 {
720 struct capidev *cdev = (struct capidev *)file->private_data;
721 struct sk_buff *skb;
722 u16 mlen;
723
724 if (!cdev->ap.applid)
725 return -ENODEV;
726
727 skb = alloc_skb(count, GFP_USER);
728 if (!skb)
729 return -ENOMEM;
730
731 if (copy_from_user(skb_put(skb, count), buf, count)) {
732 kfree_skb(skb);
733 return -EFAULT;
734 }
735 mlen = CAPIMSG_LEN(skb->data);
736 if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) {
737 if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) {
738 kfree_skb(skb);
739 return -EINVAL;
740 }
741 } else {
742 if (mlen != count) {
743 kfree_skb(skb);
744 return -EINVAL;
745 }
746 }
747 CAPIMSG_SETAPPID(skb->data, cdev->ap.applid);
748
749 if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) {
750 mutex_lock(&cdev->lock);
751 capincci_free(cdev, CAPIMSG_NCCI(skb->data));
752 mutex_unlock(&cdev->lock);
753 }
754
755 cdev->errcode = capi20_put_message(&cdev->ap, skb);
756
757 if (cdev->errcode) {
758 kfree_skb(skb);
759 return -EIO;
760 }
761 return count;
762 }
763
764 static unsigned int
765 capi_poll(struct file *file, poll_table * wait)
766 {
767 struct capidev *cdev = (struct capidev *)file->private_data;
768 unsigned int mask = 0;
769
770 if (!cdev->ap.applid)
771 return POLLERR;
772
773 poll_wait(file, &(cdev->recvwait), wait);
774 mask = POLLOUT | POLLWRNORM;
775 if (!skb_queue_empty(&cdev->recvqueue))
776 mask |= POLLIN | POLLRDNORM;
777 return mask;
778 }
779
780 static int
781 capi_ioctl(struct inode *inode, struct file *file,
782 unsigned int cmd, unsigned long arg)
783 {
784 struct capidev *cdev = file->private_data;
785 capi_ioctl_struct data;
786 int retval = -EINVAL;
787 void __user *argp = (void __user *)arg;
788
789 switch (cmd) {
790 case CAPI_REGISTER:
791 mutex_lock(&cdev->lock);
792
793 if (cdev->ap.applid) {
794 retval = -EEXIST;
795 goto register_out;
796 }
797 if (copy_from_user(&cdev->ap.rparam, argp,
798 sizeof(struct capi_register_params))) {
799 retval = -EFAULT;
800 goto register_out;
801 }
802 cdev->ap.private = cdev;
803 cdev->ap.recv_message = capi_recv_message;
804 cdev->errcode = capi20_register(&cdev->ap);
805 retval = (int)cdev->ap.applid;
806 if (cdev->errcode) {
807 cdev->ap.applid = 0;
808 retval = -EIO;
809 }
810
811 register_out:
812 mutex_unlock(&cdev->lock);
813 return retval;
814
815 case CAPI_GET_VERSION:
816 {
817 if (copy_from_user(&data.contr, argp,
818 sizeof(data.contr)))
819 return -EFAULT;
820 cdev->errcode = capi20_get_version(data.contr, &data.version);
821 if (cdev->errcode)
822 return -EIO;
823 if (copy_to_user(argp, &data.version,
824 sizeof(data.version)))
825 return -EFAULT;
826 }
827 return 0;
828
829 case CAPI_GET_SERIAL:
830 {
831 if (copy_from_user(&data.contr, argp,
832 sizeof(data.contr)))
833 return -EFAULT;
834 cdev->errcode = capi20_get_serial (data.contr, data.serial);
835 if (cdev->errcode)
836 return -EIO;
837 if (copy_to_user(argp, data.serial,
838 sizeof(data.serial)))
839 return -EFAULT;
840 }
841 return 0;
842 case CAPI_GET_PROFILE:
843 {
844 if (copy_from_user(&data.contr, argp,
845 sizeof(data.contr)))
846 return -EFAULT;
847
848 if (data.contr == 0) {
849 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
850 if (cdev->errcode)
851 return -EIO;
852
853 retval = copy_to_user(argp,
854 &data.profile.ncontroller,
855 sizeof(data.profile.ncontroller));
856
857 } else {
858 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
859 if (cdev->errcode)
860 return -EIO;
861
862 retval = copy_to_user(argp, &data.profile,
863 sizeof(data.profile));
864 }
865 if (retval)
866 return -EFAULT;
867 }
868 return 0;
869
870 case CAPI_GET_MANUFACTURER:
871 {
872 if (copy_from_user(&data.contr, argp,
873 sizeof(data.contr)))
874 return -EFAULT;
875 cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer);
876 if (cdev->errcode)
877 return -EIO;
878
879 if (copy_to_user(argp, data.manufacturer,
880 sizeof(data.manufacturer)))
881 return -EFAULT;
882
883 }
884 return 0;
885 case CAPI_GET_ERRCODE:
886 data.errcode = cdev->errcode;
887 cdev->errcode = CAPI_NOERROR;
888 if (arg) {
889 if (copy_to_user(argp, &data.errcode,
890 sizeof(data.errcode)))
891 return -EFAULT;
892 }
893 return data.errcode;
894
895 case CAPI_INSTALLED:
896 if (capi20_isinstalled() == CAPI_NOERROR)
897 return 0;
898 return -ENXIO;
899
900 case CAPI_MANUFACTURER_CMD:
901 {
902 struct capi_manufacturer_cmd mcmd;
903 if (!capable(CAP_SYS_ADMIN))
904 return -EPERM;
905 if (copy_from_user(&mcmd, argp, sizeof(mcmd)))
906 return -EFAULT;
907 return capi20_manufacturer(mcmd.cmd, mcmd.data);
908 }
909 return 0;
910
911 case CAPI_SET_FLAGS:
912 case CAPI_CLR_FLAGS: {
913 unsigned userflags;
914
915 if (copy_from_user(&userflags, argp, sizeof(userflags)))
916 return -EFAULT;
917
918 mutex_lock(&cdev->lock);
919 if (cmd == CAPI_SET_FLAGS)
920 cdev->userflags |= userflags;
921 else
922 cdev->userflags &= ~userflags;
923 mutex_unlock(&cdev->lock);
924 return 0;
925 }
926 case CAPI_GET_FLAGS:
927 if (copy_to_user(argp, &cdev->userflags,
928 sizeof(cdev->userflags)))
929 return -EFAULT;
930 return 0;
931
932 case CAPI_NCCI_OPENCOUNT: {
933 struct capincci *nccip;
934 unsigned ncci;
935 int count = 0;
936
937 if (copy_from_user(&ncci, argp, sizeof(ncci)))
938 return -EFAULT;
939
940 mutex_lock(&cdev->lock);
941 nccip = capincci_find(cdev, (u32)ncci);
942 if (nccip)
943 count = capincci_minor_opencount(nccip);
944 mutex_unlock(&cdev->lock);
945 return count;
946 }
947
948 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
949 case CAPI_NCCI_GETUNIT: {
950 struct capincci *nccip;
951 struct capiminor *mp;
952 unsigned ncci;
953 int unit = -ESRCH;
954
955 if (copy_from_user(&ncci, argp, sizeof(ncci)))
956 return -EFAULT;
957
958 mutex_lock(&cdev->lock);
959 nccip = capincci_find(cdev, (u32)ncci);
960 if (nccip) {
961 mp = nccip->minorp;
962 if (mp)
963 unit = mp->minor;
964 }
965 mutex_unlock(&cdev->lock);
966 return unit;
967 }
968 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
969
970 default:
971 return -EINVAL;
972 }
973 }
974
975 static int capi_open(struct inode *inode, struct file *file)
976 {
977 struct capidev *cdev;
978
979 cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
980 if (!cdev)
981 return -ENOMEM;
982
983 mutex_init(&cdev->lock);
984 skb_queue_head_init(&cdev->recvqueue);
985 init_waitqueue_head(&cdev->recvwait);
986 INIT_LIST_HEAD(&cdev->nccis);
987 file->private_data = cdev;
988
989 mutex_lock(&capidev_list_lock);
990 list_add_tail(&cdev->list, &capidev_list);
991 mutex_unlock(&capidev_list_lock);
992
993 return nonseekable_open(inode, file);
994 }
995
996 static int capi_release(struct inode *inode, struct file *file)
997 {
998 struct capidev *cdev = file->private_data;
999
1000 mutex_lock(&capidev_list_lock);
1001 list_del(&cdev->list);
1002 mutex_unlock(&capidev_list_lock);
1003
1004 if (cdev->ap.applid)
1005 capi20_release(&cdev->ap);
1006 skb_queue_purge(&cdev->recvqueue);
1007 capincci_free(cdev, 0xffffffff);
1008
1009 kfree(cdev);
1010 return 0;
1011 }
1012
1013 static const struct file_operations capi_fops =
1014 {
1015 .owner = THIS_MODULE,
1016 .llseek = no_llseek,
1017 .read = capi_read,
1018 .write = capi_write,
1019 .poll = capi_poll,
1020 .ioctl = capi_ioctl,
1021 .open = capi_open,
1022 .release = capi_release,
1023 };
1024
1025 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1026 /* -------- tty_operations for capincci ----------------------------- */
1027
1028 static int
1029 capinc_tty_install(struct tty_driver *driver, struct tty_struct *tty)
1030 {
1031 int idx = tty->index;
1032 struct capiminor *mp = capiminor_get(idx);
1033 int ret = tty_init_termios(tty);
1034
1035 if (ret == 0) {
1036 tty_driver_kref_get(driver);
1037 tty->count++;
1038 tty->driver_data = mp;
1039 driver->ttys[idx] = tty;
1040 } else
1041 capiminor_put(mp);
1042 return ret;
1043 }
1044
1045 static void capinc_tty_cleanup(struct tty_struct *tty)
1046 {
1047 struct capiminor *mp = tty->driver_data;
1048 tty->driver_data = NULL;
1049 capiminor_put(mp);
1050 }
1051
1052 static int capinc_tty_open(struct tty_struct *tty, struct file *filp)
1053 {
1054 struct capiminor *mp = tty->driver_data;
1055 unsigned long flags;
1056 int err;
1057
1058 err = tty_port_open(&mp->port, tty, filp);
1059 if (err)
1060 return err;
1061
1062 spin_lock_irqsave(&workaround_lock, flags);
1063 handle_minor_recv(mp);
1064 spin_unlock_irqrestore(&workaround_lock, flags);
1065 return 0;
1066 }
1067
1068 static void capinc_tty_close(struct tty_struct *tty, struct file *filp)
1069 {
1070 struct capiminor *mp = tty->driver_data;
1071
1072 tty_port_close(&mp->port, tty, filp);
1073 }
1074
1075 static int capinc_tty_write(struct tty_struct *tty,
1076 const unsigned char *buf, int count)
1077 {
1078 struct capiminor *mp = tty->driver_data;
1079 struct sk_buff *skb;
1080 unsigned long flags;
1081
1082 #ifdef _DEBUG_TTYFUNCS
1083 printk(KERN_DEBUG "capinc_tty_write(count=%d)\n", count);
1084 #endif
1085
1086 spin_lock_irqsave(&workaround_lock, flags);
1087 skb = mp->ttyskb;
1088 if (skb) {
1089 mp->ttyskb = NULL;
1090 skb_queue_tail(&mp->outqueue, skb);
1091 mp->outbytes += skb->len;
1092 }
1093
1094 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC);
1095 if (!skb) {
1096 printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n");
1097 spin_unlock_irqrestore(&workaround_lock, flags);
1098 return -ENOMEM;
1099 }
1100
1101 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1102 memcpy(skb_put(skb, count), buf, count);
1103
1104 skb_queue_tail(&mp->outqueue, skb);
1105 mp->outbytes += skb->len;
1106 (void)handle_minor_send(mp);
1107 spin_unlock_irqrestore(&workaround_lock, flags);
1108 return count;
1109 }
1110
1111 static int capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
1112 {
1113 struct capiminor *mp = tty->driver_data;
1114 struct sk_buff *skb;
1115 unsigned long flags;
1116 int ret = 1;
1117
1118 #ifdef _DEBUG_TTYFUNCS
1119 printk(KERN_DEBUG "capinc_put_char(%u)\n", ch);
1120 #endif
1121
1122 spin_lock_irqsave(&workaround_lock, flags);
1123 skb = mp->ttyskb;
1124 if (skb) {
1125 if (skb_tailroom(skb) > 0) {
1126 *(skb_put(skb, 1)) = ch;
1127 spin_unlock_irqrestore(&workaround_lock, flags);
1128 return 1;
1129 }
1130 mp->ttyskb = NULL;
1131 skb_queue_tail(&mp->outqueue, skb);
1132 mp->outbytes += skb->len;
1133 (void)handle_minor_send(mp);
1134 }
1135 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+CAPI_MAX_BLKSIZE, GFP_ATOMIC);
1136 if (skb) {
1137 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1138 *(skb_put(skb, 1)) = ch;
1139 mp->ttyskb = skb;
1140 } else {
1141 printk(KERN_ERR "capinc_put_char: char %u lost\n", ch);
1142 ret = 0;
1143 }
1144 spin_unlock_irqrestore(&workaround_lock, flags);
1145 return ret;
1146 }
1147
1148 static void capinc_tty_flush_chars(struct tty_struct *tty)
1149 {
1150 struct capiminor *mp = tty->driver_data;
1151 struct sk_buff *skb;
1152 unsigned long flags;
1153
1154 #ifdef _DEBUG_TTYFUNCS
1155 printk(KERN_DEBUG "capinc_tty_flush_chars\n");
1156 #endif
1157
1158 spin_lock_irqsave(&workaround_lock, flags);
1159 skb = mp->ttyskb;
1160 if (skb) {
1161 mp->ttyskb = NULL;
1162 skb_queue_tail(&mp->outqueue, skb);
1163 mp->outbytes += skb->len;
1164 (void)handle_minor_send(mp);
1165 }
1166 (void)handle_minor_recv(mp);
1167 spin_unlock_irqrestore(&workaround_lock, flags);
1168 }
1169
1170 static int capinc_tty_write_room(struct tty_struct *tty)
1171 {
1172 struct capiminor *mp = tty->driver_data;
1173 int room;
1174
1175 room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue);
1176 room *= CAPI_MAX_BLKSIZE;
1177 #ifdef _DEBUG_TTYFUNCS
1178 printk(KERN_DEBUG "capinc_tty_write_room = %d\n", room);
1179 #endif
1180 return room;
1181 }
1182
1183 static int capinc_tty_chars_in_buffer(struct tty_struct *tty)
1184 {
1185 struct capiminor *mp = tty->driver_data;
1186
1187 #ifdef _DEBUG_TTYFUNCS
1188 printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n",
1189 mp->outbytes, mp->nack,
1190 skb_queue_len(&mp->outqueue),
1191 skb_queue_len(&mp->inqueue));
1192 #endif
1193 return mp->outbytes;
1194 }
1195
1196 static int capinc_tty_ioctl(struct tty_struct *tty, struct file * file,
1197 unsigned int cmd, unsigned long arg)
1198 {
1199 int error = 0;
1200 switch (cmd) {
1201 default:
1202 error = n_tty_ioctl_helper(tty, file, cmd, arg);
1203 break;
1204 }
1205 return error;
1206 }
1207
1208 static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios * old)
1209 {
1210 #ifdef _DEBUG_TTYFUNCS
1211 printk(KERN_DEBUG "capinc_tty_set_termios\n");
1212 #endif
1213 }
1214
1215 static void capinc_tty_throttle(struct tty_struct *tty)
1216 {
1217 struct capiminor *mp = tty->driver_data;
1218 #ifdef _DEBUG_TTYFUNCS
1219 printk(KERN_DEBUG "capinc_tty_throttle\n");
1220 #endif
1221 mp->ttyinstop = 1;
1222 }
1223
1224 static void capinc_tty_unthrottle(struct tty_struct *tty)
1225 {
1226 struct capiminor *mp = tty->driver_data;
1227 unsigned long flags;
1228
1229 #ifdef _DEBUG_TTYFUNCS
1230 printk(KERN_DEBUG "capinc_tty_unthrottle\n");
1231 #endif
1232 spin_lock_irqsave(&workaround_lock, flags);
1233 mp->ttyinstop = 0;
1234 handle_minor_recv(mp);
1235 spin_unlock_irqrestore(&workaround_lock, flags);
1236 }
1237
1238 static void capinc_tty_stop(struct tty_struct *tty)
1239 {
1240 struct capiminor *mp = tty->driver_data;
1241
1242 #ifdef _DEBUG_TTYFUNCS
1243 printk(KERN_DEBUG "capinc_tty_stop\n");
1244 #endif
1245 mp->ttyoutstop = 1;
1246 }
1247
1248 static void capinc_tty_start(struct tty_struct *tty)
1249 {
1250 struct capiminor *mp = tty->driver_data;
1251 unsigned long flags;
1252
1253 #ifdef _DEBUG_TTYFUNCS
1254 printk(KERN_DEBUG "capinc_tty_start\n");
1255 #endif
1256 spin_lock_irqsave(&workaround_lock, flags);
1257 mp->ttyoutstop = 0;
1258 (void)handle_minor_send(mp);
1259 spin_unlock_irqrestore(&workaround_lock, flags);
1260 }
1261
1262 static void capinc_tty_hangup(struct tty_struct *tty)
1263 {
1264 struct capiminor *mp = tty->driver_data;
1265
1266 #ifdef _DEBUG_TTYFUNCS
1267 printk(KERN_DEBUG "capinc_tty_hangup\n");
1268 #endif
1269 tty_port_hangup(&mp->port);
1270 }
1271
1272 static int capinc_tty_break_ctl(struct tty_struct *tty, int state)
1273 {
1274 #ifdef _DEBUG_TTYFUNCS
1275 printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state);
1276 #endif
1277 return 0;
1278 }
1279
1280 static void capinc_tty_flush_buffer(struct tty_struct *tty)
1281 {
1282 #ifdef _DEBUG_TTYFUNCS
1283 printk(KERN_DEBUG "capinc_tty_flush_buffer\n");
1284 #endif
1285 }
1286
1287 static void capinc_tty_set_ldisc(struct tty_struct *tty)
1288 {
1289 #ifdef _DEBUG_TTYFUNCS
1290 printk(KERN_DEBUG "capinc_tty_set_ldisc\n");
1291 #endif
1292 }
1293
1294 static void capinc_tty_send_xchar(struct tty_struct *tty, char ch)
1295 {
1296 #ifdef _DEBUG_TTYFUNCS
1297 printk(KERN_DEBUG "capinc_tty_send_xchar(%d)\n", ch);
1298 #endif
1299 }
1300
1301 static const struct tty_operations capinc_ops = {
1302 .open = capinc_tty_open,
1303 .close = capinc_tty_close,
1304 .write = capinc_tty_write,
1305 .put_char = capinc_tty_put_char,
1306 .flush_chars = capinc_tty_flush_chars,
1307 .write_room = capinc_tty_write_room,
1308 .chars_in_buffer = capinc_tty_chars_in_buffer,
1309 .ioctl = capinc_tty_ioctl,
1310 .set_termios = capinc_tty_set_termios,
1311 .throttle = capinc_tty_throttle,
1312 .unthrottle = capinc_tty_unthrottle,
1313 .stop = capinc_tty_stop,
1314 .start = capinc_tty_start,
1315 .hangup = capinc_tty_hangup,
1316 .break_ctl = capinc_tty_break_ctl,
1317 .flush_buffer = capinc_tty_flush_buffer,
1318 .set_ldisc = capinc_tty_set_ldisc,
1319 .send_xchar = capinc_tty_send_xchar,
1320 .install = capinc_tty_install,
1321 .cleanup = capinc_tty_cleanup,
1322 };
1323
1324 static int __init capinc_tty_init(void)
1325 {
1326 struct tty_driver *drv;
1327 int err;
1328
1329 if (capi_ttyminors > CAPINC_MAX_PORTS)
1330 capi_ttyminors = CAPINC_MAX_PORTS;
1331 if (capi_ttyminors <= 0)
1332 capi_ttyminors = CAPINC_NR_PORTS;
1333
1334 capiminors = kzalloc(sizeof(struct capi_minor *) * capi_ttyminors,
1335 GFP_KERNEL);
1336 if (!capiminors)
1337 return -ENOMEM;
1338
1339 drv = alloc_tty_driver(capi_ttyminors);
1340 if (!drv) {
1341 kfree(capiminors);
1342 return -ENOMEM;
1343 }
1344 drv->owner = THIS_MODULE;
1345 drv->driver_name = "capi_nc";
1346 drv->name = "capi";
1347 drv->major = 0;
1348 drv->minor_start = 0;
1349 drv->type = TTY_DRIVER_TYPE_SERIAL;
1350 drv->subtype = SERIAL_TYPE_NORMAL;
1351 drv->init_termios = tty_std_termios;
1352 drv->init_termios.c_iflag = ICRNL;
1353 drv->init_termios.c_oflag = OPOST | ONLCR;
1354 drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1355 drv->init_termios.c_lflag = 0;
1356 drv->flags =
1357 TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS |
1358 TTY_DRIVER_DYNAMIC_DEV;
1359 tty_set_operations(drv, &capinc_ops);
1360
1361 err = tty_register_driver(drv);
1362 if (err) {
1363 put_tty_driver(drv);
1364 kfree(capiminors);
1365 printk(KERN_ERR "Couldn't register capi_nc driver\n");
1366 return err;
1367 }
1368 capinc_tty_driver = drv;
1369 return 0;
1370 }
1371
1372 static void __exit capinc_tty_exit(void)
1373 {
1374 tty_unregister_driver(capinc_tty_driver);
1375 put_tty_driver(capinc_tty_driver);
1376 kfree(capiminors);
1377 }
1378
1379 #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
1380
1381 static inline int capinc_tty_init(void)
1382 {
1383 return 0;
1384 }
1385
1386 static inline void capinc_tty_exit(void) { }
1387
1388 #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
1389
1390 /* -------- /proc functions ----------------------------------------- */
1391
1392 /*
1393 * /proc/capi/capi20:
1394 * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt
1395 */
1396 static int capi20_proc_show(struct seq_file *m, void *v)
1397 {
1398 struct capidev *cdev;
1399 struct list_head *l;
1400
1401 mutex_lock(&capidev_list_lock);
1402 list_for_each(l, &capidev_list) {
1403 cdev = list_entry(l, struct capidev, list);
1404 seq_printf(m, "0 %d %lu %lu %lu %lu\n",
1405 cdev->ap.applid,
1406 cdev->ap.nrecvctlpkt,
1407 cdev->ap.nrecvdatapkt,
1408 cdev->ap.nsentctlpkt,
1409 cdev->ap.nsentdatapkt);
1410 }
1411 mutex_unlock(&capidev_list_lock);
1412 return 0;
1413 }
1414
1415 static int capi20_proc_open(struct inode *inode, struct file *file)
1416 {
1417 return single_open(file, capi20_proc_show, NULL);
1418 }
1419
1420 static const struct file_operations capi20_proc_fops = {
1421 .owner = THIS_MODULE,
1422 .open = capi20_proc_open,
1423 .read = seq_read,
1424 .llseek = seq_lseek,
1425 .release = single_release,
1426 };
1427
1428 /*
1429 * /proc/capi/capi20ncci:
1430 * applid ncci
1431 */
1432 static int capi20ncci_proc_show(struct seq_file *m, void *v)
1433 {
1434 struct capidev *cdev;
1435 struct capincci *np;
1436
1437 mutex_lock(&capidev_list_lock);
1438 list_for_each_entry(cdev, &capidev_list, list) {
1439 mutex_lock(&cdev->lock);
1440 list_for_each_entry(np, &cdev->nccis, list)
1441 seq_printf(m, "%d 0x%x\n", cdev->ap.applid, np->ncci);
1442 mutex_unlock(&cdev->lock);
1443 }
1444 mutex_unlock(&capidev_list_lock);
1445 return 0;
1446 }
1447
1448 static int capi20ncci_proc_open(struct inode *inode, struct file *file)
1449 {
1450 return single_open(file, capi20ncci_proc_show, NULL);
1451 }
1452
1453 static const struct file_operations capi20ncci_proc_fops = {
1454 .owner = THIS_MODULE,
1455 .open = capi20ncci_proc_open,
1456 .read = seq_read,
1457 .llseek = seq_lseek,
1458 .release = single_release,
1459 };
1460
1461 static void __init proc_init(void)
1462 {
1463 proc_create("capi/capi20", 0, NULL, &capi20_proc_fops);
1464 proc_create("capi/capi20ncci", 0, NULL, &capi20ncci_proc_fops);
1465 }
1466
1467 static void __exit proc_exit(void)
1468 {
1469 remove_proc_entry("capi/capi20", NULL);
1470 remove_proc_entry("capi/capi20ncci", NULL);
1471 }
1472
1473 /* -------- init function and module interface ---------------------- */
1474
1475
1476 static int __init capi_init(void)
1477 {
1478 const char *compileinfo;
1479 int major_ret;
1480
1481 major_ret = register_chrdev(capi_major, "capi20", &capi_fops);
1482 if (major_ret < 0) {
1483 printk(KERN_ERR "capi20: unable to get major %d\n", capi_major);
1484 return major_ret;
1485 }
1486 capi_class = class_create(THIS_MODULE, "capi");
1487 if (IS_ERR(capi_class)) {
1488 unregister_chrdev(capi_major, "capi20");
1489 return PTR_ERR(capi_class);
1490 }
1491
1492 device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi");
1493
1494 if (capinc_tty_init() < 0) {
1495 device_destroy(capi_class, MKDEV(capi_major, 0));
1496 class_destroy(capi_class);
1497 unregister_chrdev(capi_major, "capi20");
1498 return -ENOMEM;
1499 }
1500
1501 proc_init();
1502
1503 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
1504 compileinfo = " (middleware+capifs)";
1505 #elif defined(CONFIG_ISDN_CAPI_MIDDLEWARE)
1506 compileinfo = " (no capifs)";
1507 #else
1508 compileinfo = " (no middleware)";
1509 #endif
1510 printk(KERN_NOTICE "CAPI 2.0 started up with major %d%s\n",
1511 capi_major, compileinfo);
1512
1513 return 0;
1514 }
1515
1516 static void __exit capi_exit(void)
1517 {
1518 proc_exit();
1519
1520 device_destroy(capi_class, MKDEV(capi_major, 0));
1521 class_destroy(capi_class);
1522 unregister_chrdev(capi_major, "capi20");
1523
1524 capinc_tty_exit();
1525 }
1526
1527 module_init(capi_init);
1528 module_exit(capi_exit);
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