CAPI: Silence lockdep warning on get_capi_appl_by_nr usage
[linux-2.6.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/timer.h>
24 #include <linux/wait.h>
25 #include <linux/tty.h>
26 #include <linux/netdevice.h>
27 #include <linux/ppp_defs.h>
28 #include <linux/if_ppp.h>
29 #include <linux/skbuff.h>
30 #include <linux/proc_fs.h>
31 #include <linux/seq_file.h>
32 #include <linux/poll.h>
33 #include <linux/capi.h>
34 #include <linux/kernelcapi.h>
35 #include <linux/init.h>
36 #include <linux/device.h>
37 #include <linux/moduleparam.h>
38 #include <linux/isdn/capiutil.h>
39 #include <linux/isdn/capicmd.h>
40
41 #include "capifs.h"
42
43 MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface");
44 MODULE_AUTHOR("Carsten Paeth");
45 MODULE_LICENSE("GPL");
46
47 #undef _DEBUG_TTYFUNCS          /* call to tty_driver */
48 #undef _DEBUG_DATAFLOW          /* data flow */
49
50 /* -------- driver information -------------------------------------- */
51
52 static DEFINE_MUTEX(capi_mutex);
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 ackqueue_entry {
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         atomic_t                datahandle;
93         atomic_t                msgid;
94
95         struct tty_port port;
96         int                ttyinstop;
97         int                ttyoutstop;
98
99         struct sk_buff_head     inqueue;
100
101         struct sk_buff_head     outqueue;
102         int                     outbytes;
103         struct sk_buff          *outskb;
104         spinlock_t              outlock;
105
106         /* transmit path */
107         struct list_head ackqueue;
108         int nack;
109         spinlock_t ackqlock;
110 };
111
112 struct capincci {
113         struct list_head list;
114         u32              ncci;
115         struct capidev  *cdev;
116 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
117         struct capiminor *minorp;
118 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
119 };
120
121 struct capidev {
122         struct list_head list;
123         struct capi20_appl ap;
124         u16             errcode;
125         unsigned        userflags;
126
127         struct sk_buff_head recvqueue;
128         wait_queue_head_t recvwait;
129
130         struct list_head nccis;
131
132         struct mutex lock;
133 };
134
135 /* -------- global variables ---------------------------------------- */
136
137 static DEFINE_MUTEX(capidev_list_lock);
138 static LIST_HEAD(capidev_list);
139
140 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
141
142 static DEFINE_SPINLOCK(capiminors_lock);
143 static struct capiminor **capiminors;
144
145 static struct tty_driver *capinc_tty_driver;
146
147 /* -------- datahandles --------------------------------------------- */
148
149 static int capiminor_add_ack(struct capiminor *mp, u16 datahandle)
150 {
151         struct ackqueue_entry *n;
152
153         n = kmalloc(sizeof(*n), GFP_ATOMIC);
154         if (unlikely(!n)) {
155                 printk(KERN_ERR "capi: alloc datahandle failed\n");
156                 return -1;
157         }
158         n->datahandle = datahandle;
159         INIT_LIST_HEAD(&n->list);
160         spin_lock_bh(&mp->ackqlock);
161         list_add_tail(&n->list, &mp->ackqueue);
162         mp->nack++;
163         spin_unlock_bh(&mp->ackqlock);
164         return 0;
165 }
166
167 static int capiminor_del_ack(struct capiminor *mp, u16 datahandle)
168 {
169         struct ackqueue_entry *p, *tmp;
170
171         spin_lock_bh(&mp->ackqlock);
172         list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
173                 if (p->datahandle == datahandle) {
174                         list_del(&p->list);
175                         mp->nack--;
176                         spin_unlock_bh(&mp->ackqlock);
177                         kfree(p);
178                         return 0;
179                 }
180         }
181         spin_unlock_bh(&mp->ackqlock);
182         return -1;
183 }
184
185 static void capiminor_del_all_ack(struct capiminor *mp)
186 {
187         struct ackqueue_entry *p, *tmp;
188
189         list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
190                 list_del(&p->list);
191                 kfree(p);
192                 mp->nack--;
193         }
194 }
195
196
197 /* -------- struct capiminor ---------------------------------------- */
198
199 static const struct tty_port_operations capiminor_port_ops; /* we have none */
200
201 static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci)
202 {
203         struct capiminor *mp;
204         struct device *dev;
205         unsigned int minor;
206
207         mp = kzalloc(sizeof(*mp), GFP_KERNEL);
208         if (!mp) {
209                 printk(KERN_ERR "capi: can't alloc capiminor\n");
210                 return NULL;
211         }
212
213         kref_init(&mp->kref);
214
215         mp->ap = ap;
216         mp->ncci = ncci;
217         INIT_LIST_HEAD(&mp->ackqueue);
218         spin_lock_init(&mp->ackqlock);
219
220         skb_queue_head_init(&mp->inqueue);
221         skb_queue_head_init(&mp->outqueue);
222         spin_lock_init(&mp->outlock);
223
224         tty_port_init(&mp->port);
225         mp->port.ops = &capiminor_port_ops;
226
227         /* Allocate the least unused minor number. */
228         spin_lock(&capiminors_lock);
229         for (minor = 0; minor < capi_ttyminors; minor++)
230                 if (!capiminors[minor]) {
231                         capiminors[minor] = mp;
232                         break;
233                 }
234         spin_unlock(&capiminors_lock);
235
236         if (minor == capi_ttyminors) {
237                 printk(KERN_NOTICE "capi: out of minors\n");
238                 goto err_out1;
239         }
240
241         mp->minor = minor;
242
243         dev = tty_register_device(capinc_tty_driver, minor, NULL);
244         if (IS_ERR(dev))
245                 goto err_out2;
246
247         return mp;
248
249 err_out2:
250         spin_lock(&capiminors_lock);
251         capiminors[minor] = NULL;
252         spin_unlock(&capiminors_lock);
253
254 err_out1:
255         kfree(mp);
256         return NULL;
257 }
258
259 static void capiminor_destroy(struct kref *kref)
260 {
261         struct capiminor *mp = container_of(kref, struct capiminor, kref);
262
263         kfree_skb(mp->outskb);
264         skb_queue_purge(&mp->inqueue);
265         skb_queue_purge(&mp->outqueue);
266         capiminor_del_all_ack(mp);
267         kfree(mp);
268 }
269
270 static struct capiminor *capiminor_get(unsigned int minor)
271 {
272         struct capiminor *mp;
273
274         spin_lock(&capiminors_lock);
275         mp = capiminors[minor];
276         if (mp)
277                 kref_get(&mp->kref);
278         spin_unlock(&capiminors_lock);
279
280         return mp;
281 }
282
283 static inline void capiminor_put(struct capiminor *mp)
284 {
285         kref_put(&mp->kref, capiminor_destroy);
286 }
287
288 static void capiminor_free(struct capiminor *mp)
289 {
290         tty_unregister_device(capinc_tty_driver, mp->minor);
291
292         spin_lock(&capiminors_lock);
293         capiminors[mp->minor] = NULL;
294         spin_unlock(&capiminors_lock);
295
296         capiminor_put(mp);
297 }
298
299 /* -------- struct capincci ----------------------------------------- */
300
301 static void capincci_alloc_minor(struct capidev *cdev, struct capincci *np)
302 {
303         struct capiminor *mp;
304         dev_t device;
305
306         if (!(cdev->userflags & CAPIFLAG_HIGHJACKING))
307                 return;
308
309         mp = np->minorp = capiminor_alloc(&cdev->ap, np->ncci);
310         if (mp) {
311                 device = MKDEV(capinc_tty_driver->major, mp->minor);
312                 mp->capifs_dentry = capifs_new_ncci(mp->minor, device);
313         }
314 }
315
316 static void capincci_free_minor(struct capincci *np)
317 {
318         struct capiminor *mp = np->minorp;
319         struct tty_struct *tty;
320
321         if (mp) {
322                 capifs_free_ncci(mp->capifs_dentry);
323
324                 tty = tty_port_tty_get(&mp->port);
325                 if (tty) {
326                         tty_vhangup(tty);
327                         tty_kref_put(tty);
328                 }
329
330                 capiminor_free(mp);
331         }
332 }
333
334 static inline unsigned int capincci_minor_opencount(struct capincci *np)
335 {
336         struct capiminor *mp = np->minorp;
337         unsigned int count = 0;
338         struct tty_struct *tty;
339
340         if (mp) {
341                 tty = tty_port_tty_get(&mp->port);
342                 if (tty) {
343                         count = tty->count;
344                         tty_kref_put(tty);
345                 }
346         }
347         return count;
348 }
349
350 #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
351
352 static inline void
353 capincci_alloc_minor(struct capidev *cdev, struct capincci *np) { }
354 static inline void capincci_free_minor(struct capincci *np) { }
355
356 static inline unsigned int capincci_minor_opencount(struct capincci *np)
357 {
358         return 0;
359 }
360
361 #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
362
363 static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci)
364 {
365         struct capincci *np;
366
367         np = kzalloc(sizeof(*np), GFP_KERNEL);
368         if (!np)
369                 return NULL;
370         np->ncci = ncci;
371         np->cdev = cdev;
372
373         capincci_alloc_minor(cdev, np);
374
375         list_add_tail(&np->list, &cdev->nccis);
376
377         return np;
378 }
379
380 static void capincci_free(struct capidev *cdev, u32 ncci)
381 {
382         struct capincci *np, *tmp;
383
384         list_for_each_entry_safe(np, tmp, &cdev->nccis, list)
385                 if (ncci == 0xffffffff || np->ncci == ncci) {
386                         capincci_free_minor(np);
387                         list_del(&np->list);
388                         kfree(np);
389                 }
390 }
391
392 static struct capincci *capincci_find(struct capidev *cdev, u32 ncci)
393 {
394         struct capincci *np;
395
396         list_for_each_entry(np, &cdev->nccis, list)
397                 if (np->ncci == ncci)
398                         return np;
399         return NULL;
400 }
401
402 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
403 /* -------- handle data queue --------------------------------------- */
404
405 static struct sk_buff *
406 gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb)
407 {
408         struct sk_buff *nskb;
409         nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_KERNEL);
410         if (nskb) {
411                 u16 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4+4+2);
412                 unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN);
413                 capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN);
414                 capimsg_setu16(s, 2, mp->ap->applid);
415                 capimsg_setu8 (s, 4, CAPI_DATA_B3);
416                 capimsg_setu8 (s, 5, CAPI_RESP);
417                 capimsg_setu16(s, 6, atomic_inc_return(&mp->msgid));
418                 capimsg_setu32(s, 8, mp->ncci);
419                 capimsg_setu16(s, 12, datahandle);
420         }
421         return nskb;
422 }
423
424 static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb)
425 {
426         unsigned int datalen = skb->len - CAPIMSG_LEN(skb->data);
427         struct tty_struct *tty;
428         struct sk_buff *nskb;
429         u16 errcode, datahandle;
430         struct tty_ldisc *ld;
431         int ret = -1;
432
433         tty = tty_port_tty_get(&mp->port);
434         if (!tty) {
435 #ifdef _DEBUG_DATAFLOW
436                 printk(KERN_DEBUG "capi: currently no receiver\n");
437 #endif
438                 return -1;
439         }
440         
441         ld = tty_ldisc_ref(tty);
442         if (!ld) {
443                 /* fatal error, do not requeue */
444                 ret = 0;
445                 kfree_skb(skb);
446                 goto deref_tty;
447         }
448
449         if (ld->ops->receive_buf == NULL) {
450 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
451                 printk(KERN_DEBUG "capi: ldisc has no receive_buf function\n");
452 #endif
453                 /* fatal error, do not requeue */
454                 goto free_skb;
455         }
456         if (mp->ttyinstop) {
457 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
458                 printk(KERN_DEBUG "capi: recv tty throttled\n");
459 #endif
460                 goto deref_ldisc;
461         }
462
463         if (tty->receive_room < datalen) {
464 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
465                 printk(KERN_DEBUG "capi: no room in tty\n");
466 #endif
467                 goto deref_ldisc;
468         }
469
470         nskb = gen_data_b3_resp_for(mp, skb);
471         if (!nskb) {
472                 printk(KERN_ERR "capi: gen_data_b3_resp failed\n");
473                 goto deref_ldisc;
474         }
475
476         datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4);
477
478         errcode = capi20_put_message(mp->ap, nskb);
479
480         if (errcode == CAPI_NOERROR) {
481                 skb_pull(skb, CAPIMSG_LEN(skb->data));
482 #ifdef _DEBUG_DATAFLOW
483                 printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldisc\n",
484                                         datahandle, skb->len);
485 #endif
486                 ld->ops->receive_buf(tty, skb->data, NULL, skb->len);
487         } else {
488                 printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n",
489                                 errcode);
490                 kfree_skb(nskb);
491
492                 if (errcode == CAPI_SENDQUEUEFULL)
493                         goto deref_ldisc;
494         }
495
496 free_skb:
497         ret = 0;
498         kfree_skb(skb);
499
500 deref_ldisc:
501         tty_ldisc_deref(ld);
502
503 deref_tty:
504         tty_kref_put(tty);
505         return ret;
506 }
507
508 static void handle_minor_recv(struct capiminor *mp)
509 {
510         struct sk_buff *skb;
511
512         while ((skb = skb_dequeue(&mp->inqueue)) != NULL)
513                 if (handle_recv_skb(mp, skb) < 0) {
514                         skb_queue_head(&mp->inqueue, skb);
515                         return;
516                 }
517 }
518
519 static void handle_minor_send(struct capiminor *mp)
520 {
521         struct tty_struct *tty;
522         struct sk_buff *skb;
523         u16 len;
524         u16 errcode;
525         u16 datahandle;
526
527         tty = tty_port_tty_get(&mp->port);
528         if (!tty)
529                 return;
530
531         if (mp->ttyoutstop) {
532 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
533                 printk(KERN_DEBUG "capi: send: tty stopped\n");
534 #endif
535                 tty_kref_put(tty);
536                 return;
537         }
538
539         while (1) {
540                 spin_lock_bh(&mp->outlock);
541                 skb = __skb_dequeue(&mp->outqueue);
542                 if (!skb) {
543                         spin_unlock_bh(&mp->outlock);
544                         break;
545                 }
546                 len = (u16)skb->len;
547                 mp->outbytes -= len;
548                 spin_unlock_bh(&mp->outlock);
549
550                 datahandle = atomic_inc_return(&mp->datahandle);
551                 skb_push(skb, CAPI_DATA_B3_REQ_LEN);
552                 memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
553                 capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
554                 capimsg_setu16(skb->data, 2, mp->ap->applid);
555                 capimsg_setu8 (skb->data, 4, CAPI_DATA_B3);
556                 capimsg_setu8 (skb->data, 5, CAPI_REQ);
557                 capimsg_setu16(skb->data, 6, atomic_inc_return(&mp->msgid));
558                 capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */
559                 capimsg_setu32(skb->data, 12, (u32)(long)skb->data);/* Data32 */
560                 capimsg_setu16(skb->data, 16, len);     /* Data length */
561                 capimsg_setu16(skb->data, 18, datahandle);
562                 capimsg_setu16(skb->data, 20, 0);       /* Flags */
563
564                 if (capiminor_add_ack(mp, datahandle) < 0) {
565                         skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
566
567                         spin_lock_bh(&mp->outlock);
568                         __skb_queue_head(&mp->outqueue, skb);
569                         mp->outbytes += len;
570                         spin_unlock_bh(&mp->outlock);
571
572                         break;
573                 }
574                 errcode = capi20_put_message(mp->ap, skb);
575                 if (errcode == CAPI_NOERROR) {
576 #ifdef _DEBUG_DATAFLOW
577                         printk(KERN_DEBUG "capi: DATA_B3_REQ %u len=%u\n",
578                                                         datahandle, len);
579 #endif
580                         continue;
581                 }
582                 capiminor_del_ack(mp, datahandle);
583
584                 if (errcode == CAPI_SENDQUEUEFULL) {
585                         skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
586
587                         spin_lock_bh(&mp->outlock);
588                         __skb_queue_head(&mp->outqueue, skb);
589                         mp->outbytes += len;
590                         spin_unlock_bh(&mp->outlock);
591
592                         break;
593                 }
594
595                 /* ups, drop packet */
596                 printk(KERN_ERR "capi: put_message = %x\n", errcode);
597                 kfree_skb(skb);
598         }
599         tty_kref_put(tty);
600 }
601
602 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
603 /* -------- function called by lower level -------------------------- */
604
605 static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb)
606 {
607         struct capidev *cdev = ap->private;
608 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
609         struct tty_struct *tty;
610         struct capiminor *mp;
611         u16 datahandle;
612 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
613         struct capincci *np;
614
615         mutex_lock(&cdev->lock);
616
617         if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) {
618                 u16 info = CAPIMSG_U16(skb->data, 12); // Info field
619                 if ((info & 0xff00) == 0)
620                         capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
621         }
622         if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND)
623                 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
624
625         if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) {
626                 skb_queue_tail(&cdev->recvqueue, skb);
627                 wake_up_interruptible(&cdev->recvwait);
628                 goto unlock_out;
629         }
630
631         np = capincci_find(cdev, CAPIMSG_CONTROL(skb->data));
632         if (!np) {
633                 printk(KERN_ERR "BUG: capi_signal: ncci not found\n");
634                 skb_queue_tail(&cdev->recvqueue, skb);
635                 wake_up_interruptible(&cdev->recvwait);
636                 goto unlock_out;
637         }
638
639 #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE
640         skb_queue_tail(&cdev->recvqueue, skb);
641         wake_up_interruptible(&cdev->recvwait);
642
643 #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */
644
645         mp = np->minorp;
646         if (!mp) {
647                 skb_queue_tail(&cdev->recvqueue, skb);
648                 wake_up_interruptible(&cdev->recvwait);
649                 goto unlock_out;
650         }
651         if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) {
652                 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+4+2);
653 #ifdef _DEBUG_DATAFLOW
654                 printk(KERN_DEBUG "capi_signal: DATA_B3_IND %u len=%d\n",
655                                 datahandle, skb->len-CAPIMSG_LEN(skb->data));
656 #endif
657                 skb_queue_tail(&mp->inqueue, skb);
658
659                 handle_minor_recv(mp);
660
661         } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) {
662
663                 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4);
664 #ifdef _DEBUG_DATAFLOW
665                 printk(KERN_DEBUG "capi_signal: DATA_B3_CONF %u 0x%x\n",
666                                 datahandle,
667                                 CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+2));
668 #endif
669                 kfree_skb(skb);
670                 capiminor_del_ack(mp, datahandle);
671                 tty = tty_port_tty_get(&mp->port);
672                 if (tty) {
673                         tty_wakeup(tty);
674                         tty_kref_put(tty);
675                 }
676                 handle_minor_send(mp);
677
678         } else {
679                 /* ups, let capi application handle it :-) */
680                 skb_queue_tail(&cdev->recvqueue, skb);
681                 wake_up_interruptible(&cdev->recvwait);
682         }
683 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
684
685 unlock_out:
686         mutex_unlock(&cdev->lock);
687 }
688
689 /* -------- file_operations for capidev ----------------------------- */
690
691 static ssize_t
692 capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
693 {
694         struct capidev *cdev = file->private_data;
695         struct sk_buff *skb;
696         size_t copied;
697         int err;
698
699         if (!cdev->ap.applid)
700                 return -ENODEV;
701
702         skb = skb_dequeue(&cdev->recvqueue);
703         if (!skb) {
704                 if (file->f_flags & O_NONBLOCK)
705                         return -EAGAIN;
706                 err = wait_event_interruptible(cdev->recvwait,
707                                 (skb = skb_dequeue(&cdev->recvqueue)));
708                 if (err)
709                         return err;
710         }
711         if (skb->len > count) {
712                 skb_queue_head(&cdev->recvqueue, skb);
713                 return -EMSGSIZE;
714         }
715         if (copy_to_user(buf, skb->data, skb->len)) {
716                 skb_queue_head(&cdev->recvqueue, skb);
717                 return -EFAULT;
718         }
719         copied = skb->len;
720
721         kfree_skb(skb);
722
723         return copied;
724 }
725
726 static ssize_t
727 capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
728 {
729         struct capidev *cdev = file->private_data;
730         struct sk_buff *skb;
731         u16 mlen;
732
733         if (!cdev->ap.applid)
734                 return -ENODEV;
735
736         skb = alloc_skb(count, GFP_USER);
737         if (!skb)
738                 return -ENOMEM;
739
740         if (copy_from_user(skb_put(skb, count), buf, count)) {
741                 kfree_skb(skb);
742                 return -EFAULT;
743         }
744         mlen = CAPIMSG_LEN(skb->data);
745         if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) {
746                 if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) {
747                         kfree_skb(skb);
748                         return -EINVAL;
749                 }
750         } else {
751                 if (mlen != count) {
752                         kfree_skb(skb);
753                         return -EINVAL;
754                 }
755         }
756         CAPIMSG_SETAPPID(skb->data, cdev->ap.applid);
757
758         if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) {
759                 mutex_lock(&cdev->lock);
760                 capincci_free(cdev, CAPIMSG_NCCI(skb->data));
761                 mutex_unlock(&cdev->lock);
762         }
763
764         cdev->errcode = capi20_put_message(&cdev->ap, skb);
765
766         if (cdev->errcode) {
767                 kfree_skb(skb);
768                 return -EIO;
769         }
770         return count;
771 }
772
773 static unsigned int
774 capi_poll(struct file *file, poll_table * wait)
775 {
776         struct capidev *cdev = file->private_data;
777         unsigned int mask = 0;
778
779         if (!cdev->ap.applid)
780                 return POLLERR;
781
782         poll_wait(file, &(cdev->recvwait), wait);
783         mask = POLLOUT | POLLWRNORM;
784         if (!skb_queue_empty(&cdev->recvqueue))
785                 mask |= POLLIN | POLLRDNORM;
786         return mask;
787 }
788
789 static int
790 capi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
791 {
792         struct capidev *cdev = file->private_data;
793         capi_ioctl_struct data;
794         int retval = -EINVAL;
795         void __user *argp = (void __user *)arg;
796
797         switch (cmd) {
798         case CAPI_REGISTER:
799                 mutex_lock(&cdev->lock);
800
801                 if (cdev->ap.applid) {
802                         retval = -EEXIST;
803                         goto register_out;
804                 }
805                 if (copy_from_user(&cdev->ap.rparam, argp,
806                                    sizeof(struct capi_register_params))) {
807                         retval = -EFAULT;
808                         goto register_out;
809                 }
810                 cdev->ap.private = cdev;
811                 cdev->ap.recv_message = capi_recv_message;
812                 cdev->errcode = capi20_register(&cdev->ap);
813                 retval = (int)cdev->ap.applid;
814                 if (cdev->errcode) {
815                         cdev->ap.applid = 0;
816                         retval = -EIO;
817                 }
818
819 register_out:
820                 mutex_unlock(&cdev->lock);
821                 return retval;
822
823         case CAPI_GET_VERSION:
824                 {
825                         if (copy_from_user(&data.contr, argp,
826                                                 sizeof(data.contr)))
827                                 return -EFAULT;
828                         cdev->errcode = capi20_get_version(data.contr, &data.version);
829                         if (cdev->errcode)
830                                 return -EIO;
831                         if (copy_to_user(argp, &data.version,
832                                          sizeof(data.version)))
833                                 return -EFAULT;
834                 }
835                 return 0;
836
837         case CAPI_GET_SERIAL:
838                 {
839                         if (copy_from_user(&data.contr, argp,
840                                            sizeof(data.contr)))
841                                 return -EFAULT;
842                         cdev->errcode = capi20_get_serial (data.contr, data.serial);
843                         if (cdev->errcode)
844                                 return -EIO;
845                         if (copy_to_user(argp, data.serial,
846                                          sizeof(data.serial)))
847                                 return -EFAULT;
848                 }
849                 return 0;
850         case CAPI_GET_PROFILE:
851                 {
852                         if (copy_from_user(&data.contr, argp,
853                                            sizeof(data.contr)))
854                                 return -EFAULT;
855
856                         if (data.contr == 0) {
857                                 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
858                                 if (cdev->errcode)
859                                         return -EIO;
860
861                                 retval = copy_to_user(argp,
862                                       &data.profile.ncontroller,
863                                        sizeof(data.profile.ncontroller));
864
865                         } else {
866                                 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
867                                 if (cdev->errcode)
868                                         return -EIO;
869
870                                 retval = copy_to_user(argp, &data.profile,
871                                                    sizeof(data.profile));
872                         }
873                         if (retval)
874                                 return -EFAULT;
875                 }
876                 return 0;
877
878         case CAPI_GET_MANUFACTURER:
879                 {
880                         if (copy_from_user(&data.contr, argp,
881                                            sizeof(data.contr)))
882                                 return -EFAULT;
883                         cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer);
884                         if (cdev->errcode)
885                                 return -EIO;
886
887                         if (copy_to_user(argp, data.manufacturer,
888                                          sizeof(data.manufacturer)))
889                                 return -EFAULT;
890
891                 }
892                 return 0;
893         case CAPI_GET_ERRCODE:
894                 data.errcode = cdev->errcode;
895                 cdev->errcode = CAPI_NOERROR;
896                 if (arg) {
897                         if (copy_to_user(argp, &data.errcode,
898                                          sizeof(data.errcode)))
899                                 return -EFAULT;
900                 }
901                 return data.errcode;
902
903         case CAPI_INSTALLED:
904                 if (capi20_isinstalled() == CAPI_NOERROR)
905                         return 0;
906                 return -ENXIO;
907
908         case CAPI_MANUFACTURER_CMD:
909                 {
910                         struct capi_manufacturer_cmd mcmd;
911                         if (!capable(CAP_SYS_ADMIN))
912                                 return -EPERM;
913                         if (copy_from_user(&mcmd, argp, sizeof(mcmd)))
914                                 return -EFAULT;
915                         return capi20_manufacturer(mcmd.cmd, mcmd.data);
916                 }
917                 return 0;
918
919         case CAPI_SET_FLAGS:
920         case CAPI_CLR_FLAGS: {
921                 unsigned userflags;
922
923                 if (copy_from_user(&userflags, argp, sizeof(userflags)))
924                         return -EFAULT;
925
926                 mutex_lock(&cdev->lock);
927                 if (cmd == CAPI_SET_FLAGS)
928                         cdev->userflags |= userflags;
929                 else
930                         cdev->userflags &= ~userflags;
931                 mutex_unlock(&cdev->lock);
932                 return 0;
933         }
934         case CAPI_GET_FLAGS:
935                 if (copy_to_user(argp, &cdev->userflags,
936                                  sizeof(cdev->userflags)))
937                         return -EFAULT;
938                 return 0;
939
940         case CAPI_NCCI_OPENCOUNT: {
941                 struct capincci *nccip;
942                 unsigned ncci;
943                 int count = 0;
944
945                 if (copy_from_user(&ncci, argp, sizeof(ncci)))
946                         return -EFAULT;
947
948                 mutex_lock(&cdev->lock);
949                 nccip = capincci_find(cdev, (u32)ncci);
950                 if (nccip)
951                         count = capincci_minor_opencount(nccip);
952                 mutex_unlock(&cdev->lock);
953                 return count;
954         }
955
956 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
957         case CAPI_NCCI_GETUNIT: {
958                 struct capincci *nccip;
959                 struct capiminor *mp;
960                 unsigned ncci;
961                 int unit = -ESRCH;
962
963                 if (copy_from_user(&ncci, argp, sizeof(ncci)))
964                         return -EFAULT;
965
966                 mutex_lock(&cdev->lock);
967                 nccip = capincci_find(cdev, (u32)ncci);
968                 if (nccip) {
969                         mp = nccip->minorp;
970                         if (mp)
971                                 unit = mp->minor;
972                 }
973                 mutex_unlock(&cdev->lock);
974                 return unit;
975         }
976 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
977
978         default:
979                 return -EINVAL;
980         }
981 }
982
983 static long
984 capi_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
985 {
986         int ret;
987
988         mutex_lock(&capi_mutex);
989         ret = capi_ioctl(file, cmd, arg);
990         mutex_unlock(&capi_mutex);
991
992         return ret;
993 }
994
995 static int capi_open(struct inode *inode, struct file *file)
996 {
997         struct capidev *cdev;
998
999         cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
1000         if (!cdev)
1001                 return -ENOMEM;
1002
1003         mutex_init(&cdev->lock);
1004         skb_queue_head_init(&cdev->recvqueue);
1005         init_waitqueue_head(&cdev->recvwait);
1006         INIT_LIST_HEAD(&cdev->nccis);
1007         file->private_data = cdev;
1008
1009         mutex_lock(&capidev_list_lock);
1010         list_add_tail(&cdev->list, &capidev_list);
1011         mutex_unlock(&capidev_list_lock);
1012
1013         return nonseekable_open(inode, file);
1014 }
1015
1016 static int capi_release(struct inode *inode, struct file *file)
1017 {
1018         struct capidev *cdev = file->private_data;
1019
1020         mutex_lock(&capidev_list_lock);
1021         list_del(&cdev->list);
1022         mutex_unlock(&capidev_list_lock);
1023
1024         if (cdev->ap.applid)
1025                 capi20_release(&cdev->ap);
1026         skb_queue_purge(&cdev->recvqueue);
1027         capincci_free(cdev, 0xffffffff);
1028
1029         kfree(cdev);
1030         return 0;
1031 }
1032
1033 static const struct file_operations capi_fops =
1034 {
1035         .owner          = THIS_MODULE,
1036         .llseek         = no_llseek,
1037         .read           = capi_read,
1038         .write          = capi_write,
1039         .poll           = capi_poll,
1040         .unlocked_ioctl = capi_unlocked_ioctl,
1041         .open           = capi_open,
1042         .release        = capi_release,
1043 };
1044
1045 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1046 /* -------- tty_operations for capincci ----------------------------- */
1047
1048 static int
1049 capinc_tty_install(struct tty_driver *driver, struct tty_struct *tty)
1050 {
1051         int idx = tty->index;
1052         struct capiminor *mp = capiminor_get(idx);
1053         int ret = tty_init_termios(tty);
1054
1055         if (ret == 0) {
1056                 tty_driver_kref_get(driver);
1057                 tty->count++;
1058                 tty->driver_data = mp;
1059                 driver->ttys[idx] = tty;
1060         } else
1061                 capiminor_put(mp);
1062         return ret;
1063 }
1064
1065 static void capinc_tty_cleanup(struct tty_struct *tty)
1066 {
1067         struct capiminor *mp = tty->driver_data;
1068         tty->driver_data = NULL;
1069         capiminor_put(mp);
1070 }
1071
1072 static int capinc_tty_open(struct tty_struct *tty, struct file *filp)
1073 {
1074         struct capiminor *mp = tty->driver_data;
1075         int err;
1076
1077         err = tty_port_open(&mp->port, tty, filp);
1078         if (err)
1079                 return err;
1080
1081         handle_minor_recv(mp);
1082         return 0;
1083 }
1084
1085 static void capinc_tty_close(struct tty_struct *tty, struct file *filp)
1086 {
1087         struct capiminor *mp = tty->driver_data;
1088
1089         tty_port_close(&mp->port, tty, filp);
1090 }
1091
1092 static int capinc_tty_write(struct tty_struct *tty,
1093                             const unsigned char *buf, int count)
1094 {
1095         struct capiminor *mp = tty->driver_data;
1096         struct sk_buff *skb;
1097
1098 #ifdef _DEBUG_TTYFUNCS
1099         printk(KERN_DEBUG "capinc_tty_write(count=%d)\n", count);
1100 #endif
1101
1102         spin_lock_bh(&mp->outlock);
1103         skb = mp->outskb;
1104         if (skb) {
1105                 mp->outskb = NULL;
1106                 __skb_queue_tail(&mp->outqueue, skb);
1107                 mp->outbytes += skb->len;
1108         }
1109
1110         skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC);
1111         if (!skb) {
1112                 printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n");
1113                 spin_unlock_bh(&mp->outlock);
1114                 return -ENOMEM;
1115         }
1116
1117         skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1118         memcpy(skb_put(skb, count), buf, count);
1119
1120         __skb_queue_tail(&mp->outqueue, skb);
1121         mp->outbytes += skb->len;
1122         spin_unlock_bh(&mp->outlock);
1123
1124         handle_minor_send(mp);
1125
1126         return count;
1127 }
1128
1129 static int capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
1130 {
1131         struct capiminor *mp = tty->driver_data;
1132         bool invoke_send = false;
1133         struct sk_buff *skb;
1134         int ret = 1;
1135
1136 #ifdef _DEBUG_TTYFUNCS
1137         printk(KERN_DEBUG "capinc_put_char(%u)\n", ch);
1138 #endif
1139
1140         spin_lock_bh(&mp->outlock);
1141         skb = mp->outskb;
1142         if (skb) {
1143                 if (skb_tailroom(skb) > 0) {
1144                         *(skb_put(skb, 1)) = ch;
1145                         goto unlock_out;
1146                 }
1147                 mp->outskb = NULL;
1148                 __skb_queue_tail(&mp->outqueue, skb);
1149                 mp->outbytes += skb->len;
1150                 invoke_send = true;
1151         }
1152
1153         skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+CAPI_MAX_BLKSIZE, GFP_ATOMIC);
1154         if (skb) {
1155                 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1156                 *(skb_put(skb, 1)) = ch;
1157                 mp->outskb = skb;
1158         } else {
1159                 printk(KERN_ERR "capinc_put_char: char %u lost\n", ch);
1160                 ret = 0;
1161         }
1162
1163 unlock_out:
1164         spin_unlock_bh(&mp->outlock);
1165
1166         if (invoke_send)
1167                 handle_minor_send(mp);
1168
1169         return ret;
1170 }
1171
1172 static void capinc_tty_flush_chars(struct tty_struct *tty)
1173 {
1174         struct capiminor *mp = tty->driver_data;
1175         struct sk_buff *skb;
1176
1177 #ifdef _DEBUG_TTYFUNCS
1178         printk(KERN_DEBUG "capinc_tty_flush_chars\n");
1179 #endif
1180
1181         spin_lock_bh(&mp->outlock);
1182         skb = mp->outskb;
1183         if (skb) {
1184                 mp->outskb = NULL;
1185                 __skb_queue_tail(&mp->outqueue, skb);
1186                 mp->outbytes += skb->len;
1187                 spin_unlock_bh(&mp->outlock);
1188
1189                 handle_minor_send(mp);
1190         } else
1191                 spin_unlock_bh(&mp->outlock);
1192
1193         handle_minor_recv(mp);
1194 }
1195
1196 static int capinc_tty_write_room(struct tty_struct *tty)
1197 {
1198         struct capiminor *mp = tty->driver_data;
1199         int room;
1200
1201         room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue);
1202         room *= CAPI_MAX_BLKSIZE;
1203 #ifdef _DEBUG_TTYFUNCS
1204         printk(KERN_DEBUG "capinc_tty_write_room = %d\n", room);
1205 #endif
1206         return room;
1207 }
1208
1209 static int capinc_tty_chars_in_buffer(struct tty_struct *tty)
1210 {
1211         struct capiminor *mp = tty->driver_data;
1212
1213 #ifdef _DEBUG_TTYFUNCS
1214         printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n",
1215                         mp->outbytes, mp->nack,
1216                         skb_queue_len(&mp->outqueue),
1217                         skb_queue_len(&mp->inqueue));
1218 #endif
1219         return mp->outbytes;
1220 }
1221
1222 static int capinc_tty_ioctl(struct tty_struct *tty, struct file * file,
1223                     unsigned int cmd, unsigned long arg)
1224 {
1225         int error = 0;
1226         switch (cmd) {
1227         default:
1228                 error = n_tty_ioctl_helper(tty, file, cmd, arg);
1229                 break;
1230         }
1231         return error;
1232 }
1233
1234 static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios * old)
1235 {
1236 #ifdef _DEBUG_TTYFUNCS
1237         printk(KERN_DEBUG "capinc_tty_set_termios\n");
1238 #endif
1239 }
1240
1241 static void capinc_tty_throttle(struct tty_struct *tty)
1242 {
1243         struct capiminor *mp = tty->driver_data;
1244 #ifdef _DEBUG_TTYFUNCS
1245         printk(KERN_DEBUG "capinc_tty_throttle\n");
1246 #endif
1247         mp->ttyinstop = 1;
1248 }
1249
1250 static void capinc_tty_unthrottle(struct tty_struct *tty)
1251 {
1252         struct capiminor *mp = tty->driver_data;
1253
1254 #ifdef _DEBUG_TTYFUNCS
1255         printk(KERN_DEBUG "capinc_tty_unthrottle\n");
1256 #endif
1257         mp->ttyinstop = 0;
1258         handle_minor_recv(mp);
1259 }
1260
1261 static void capinc_tty_stop(struct tty_struct *tty)
1262 {
1263         struct capiminor *mp = tty->driver_data;
1264
1265 #ifdef _DEBUG_TTYFUNCS
1266         printk(KERN_DEBUG "capinc_tty_stop\n");
1267 #endif
1268         mp->ttyoutstop = 1;
1269 }
1270
1271 static void capinc_tty_start(struct tty_struct *tty)
1272 {
1273         struct capiminor *mp = tty->driver_data;
1274
1275 #ifdef _DEBUG_TTYFUNCS
1276         printk(KERN_DEBUG "capinc_tty_start\n");
1277 #endif
1278         mp->ttyoutstop = 0;
1279         handle_minor_send(mp);
1280 }
1281
1282 static void capinc_tty_hangup(struct tty_struct *tty)
1283 {
1284         struct capiminor *mp = tty->driver_data;
1285
1286 #ifdef _DEBUG_TTYFUNCS
1287         printk(KERN_DEBUG "capinc_tty_hangup\n");
1288 #endif
1289         tty_port_hangup(&mp->port);
1290 }
1291
1292 static int capinc_tty_break_ctl(struct tty_struct *tty, int state)
1293 {
1294 #ifdef _DEBUG_TTYFUNCS
1295         printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state);
1296 #endif
1297         return 0;
1298 }
1299
1300 static void capinc_tty_flush_buffer(struct tty_struct *tty)
1301 {
1302 #ifdef _DEBUG_TTYFUNCS
1303         printk(KERN_DEBUG "capinc_tty_flush_buffer\n");
1304 #endif
1305 }
1306
1307 static void capinc_tty_set_ldisc(struct tty_struct *tty)
1308 {
1309 #ifdef _DEBUG_TTYFUNCS
1310         printk(KERN_DEBUG "capinc_tty_set_ldisc\n");
1311 #endif
1312 }
1313
1314 static void capinc_tty_send_xchar(struct tty_struct *tty, char ch)
1315 {
1316 #ifdef _DEBUG_TTYFUNCS
1317         printk(KERN_DEBUG "capinc_tty_send_xchar(%d)\n", ch);
1318 #endif
1319 }
1320
1321 static const struct tty_operations capinc_ops = {
1322         .open = capinc_tty_open,
1323         .close = capinc_tty_close,
1324         .write = capinc_tty_write,
1325         .put_char = capinc_tty_put_char,
1326         .flush_chars = capinc_tty_flush_chars,
1327         .write_room = capinc_tty_write_room,
1328         .chars_in_buffer = capinc_tty_chars_in_buffer,
1329         .ioctl = capinc_tty_ioctl,
1330         .set_termios = capinc_tty_set_termios,
1331         .throttle = capinc_tty_throttle,
1332         .unthrottle = capinc_tty_unthrottle,
1333         .stop = capinc_tty_stop,
1334         .start = capinc_tty_start,
1335         .hangup = capinc_tty_hangup,
1336         .break_ctl = capinc_tty_break_ctl,
1337         .flush_buffer = capinc_tty_flush_buffer,
1338         .set_ldisc = capinc_tty_set_ldisc,
1339         .send_xchar = capinc_tty_send_xchar,
1340         .install = capinc_tty_install,
1341         .cleanup = capinc_tty_cleanup,
1342 };
1343
1344 static int __init capinc_tty_init(void)
1345 {
1346         struct tty_driver *drv;
1347         int err;
1348
1349         if (capi_ttyminors > CAPINC_MAX_PORTS)
1350                 capi_ttyminors = CAPINC_MAX_PORTS;
1351         if (capi_ttyminors <= 0)
1352                 capi_ttyminors = CAPINC_NR_PORTS;
1353
1354         capiminors = kzalloc(sizeof(struct capi_minor *) * capi_ttyminors,
1355                              GFP_KERNEL);
1356         if (!capiminors)
1357                 return -ENOMEM;
1358
1359         drv = alloc_tty_driver(capi_ttyminors);
1360         if (!drv) {
1361                 kfree(capiminors);
1362                 return -ENOMEM;
1363         }
1364         drv->owner = THIS_MODULE;
1365         drv->driver_name = "capi_nc";
1366         drv->name = "capi";
1367         drv->major = 0;
1368         drv->minor_start = 0;
1369         drv->type = TTY_DRIVER_TYPE_SERIAL;
1370         drv->subtype = SERIAL_TYPE_NORMAL;
1371         drv->init_termios = tty_std_termios;
1372         drv->init_termios.c_iflag = ICRNL;
1373         drv->init_termios.c_oflag = OPOST | ONLCR;
1374         drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1375         drv->init_termios.c_lflag = 0;
1376         drv->flags =
1377                 TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS |
1378                 TTY_DRIVER_DYNAMIC_DEV;
1379         tty_set_operations(drv, &capinc_ops);
1380
1381         err = tty_register_driver(drv);
1382         if (err) {
1383                 put_tty_driver(drv);
1384                 kfree(capiminors);
1385                 printk(KERN_ERR "Couldn't register capi_nc driver\n");
1386                 return err;
1387         }
1388         capinc_tty_driver = drv;
1389         return 0;
1390 }
1391
1392 static void __exit capinc_tty_exit(void)
1393 {
1394         tty_unregister_driver(capinc_tty_driver);
1395         put_tty_driver(capinc_tty_driver);
1396         kfree(capiminors);
1397 }
1398
1399 #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
1400
1401 static inline int capinc_tty_init(void)
1402 {
1403         return 0;
1404 }
1405
1406 static inline void capinc_tty_exit(void) { }
1407
1408 #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
1409
1410 /* -------- /proc functions ----------------------------------------- */
1411
1412 /*
1413  * /proc/capi/capi20:
1414  *  minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt
1415  */
1416 static int capi20_proc_show(struct seq_file *m, void *v)
1417 {
1418         struct capidev *cdev;
1419         struct list_head *l;
1420
1421         mutex_lock(&capidev_list_lock);
1422         list_for_each(l, &capidev_list) {
1423                 cdev = list_entry(l, struct capidev, list);
1424                 seq_printf(m, "0 %d %lu %lu %lu %lu\n",
1425                         cdev->ap.applid,
1426                         cdev->ap.nrecvctlpkt,
1427                         cdev->ap.nrecvdatapkt,
1428                         cdev->ap.nsentctlpkt,
1429                         cdev->ap.nsentdatapkt);
1430         }
1431         mutex_unlock(&capidev_list_lock);
1432         return 0;
1433 }
1434
1435 static int capi20_proc_open(struct inode *inode, struct file *file)
1436 {
1437         return single_open(file, capi20_proc_show, NULL);
1438 }
1439
1440 static const struct file_operations capi20_proc_fops = {
1441         .owner          = THIS_MODULE,
1442         .open           = capi20_proc_open,
1443         .read           = seq_read,
1444         .llseek         = seq_lseek,
1445         .release        = single_release,
1446 };
1447
1448 /*
1449  * /proc/capi/capi20ncci:
1450  *  applid ncci
1451  */
1452 static int capi20ncci_proc_show(struct seq_file *m, void *v)
1453 {
1454         struct capidev *cdev;
1455         struct capincci *np;
1456
1457         mutex_lock(&capidev_list_lock);
1458         list_for_each_entry(cdev, &capidev_list, list) {
1459                 mutex_lock(&cdev->lock);
1460                 list_for_each_entry(np, &cdev->nccis, list)
1461                         seq_printf(m, "%d 0x%x\n", cdev->ap.applid, np->ncci);
1462                 mutex_unlock(&cdev->lock);
1463         }
1464         mutex_unlock(&capidev_list_lock);
1465         return 0;
1466 }
1467
1468 static int capi20ncci_proc_open(struct inode *inode, struct file *file)
1469 {
1470         return single_open(file, capi20ncci_proc_show, NULL);
1471 }
1472
1473 static const struct file_operations capi20ncci_proc_fops = {
1474         .owner          = THIS_MODULE,
1475         .open           = capi20ncci_proc_open,
1476         .read           = seq_read,
1477         .llseek         = seq_lseek,
1478         .release        = single_release,
1479 };
1480
1481 static void __init proc_init(void)
1482 {
1483         proc_create("capi/capi20", 0, NULL, &capi20_proc_fops);
1484         proc_create("capi/capi20ncci", 0, NULL, &capi20ncci_proc_fops);
1485 }
1486
1487 static void __exit proc_exit(void)
1488 {
1489         remove_proc_entry("capi/capi20", NULL);
1490         remove_proc_entry("capi/capi20ncci", NULL);
1491 }
1492
1493 /* -------- init function and module interface ---------------------- */
1494
1495
1496 static int __init capi_init(void)
1497 {
1498         const char *compileinfo;
1499         int major_ret;
1500
1501         major_ret = register_chrdev(capi_major, "capi20", &capi_fops);
1502         if (major_ret < 0) {
1503                 printk(KERN_ERR "capi20: unable to get major %d\n", capi_major);
1504                 return major_ret;
1505         }
1506         capi_class = class_create(THIS_MODULE, "capi");
1507         if (IS_ERR(capi_class)) {
1508                 unregister_chrdev(capi_major, "capi20");
1509                 return PTR_ERR(capi_class);
1510         }
1511
1512         device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi");
1513
1514         if (capinc_tty_init() < 0) {
1515                 device_destroy(capi_class, MKDEV(capi_major, 0));
1516                 class_destroy(capi_class);
1517                 unregister_chrdev(capi_major, "capi20");
1518                 return -ENOMEM;
1519         }
1520
1521         proc_init();
1522
1523 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
1524         compileinfo = " (middleware+capifs)";
1525 #elif defined(CONFIG_ISDN_CAPI_MIDDLEWARE)
1526         compileinfo = " (no capifs)";
1527 #else
1528         compileinfo = " (no middleware)";
1529 #endif
1530         printk(KERN_NOTICE "CAPI 2.0 started up with major %d%s\n",
1531                capi_major, compileinfo);
1532
1533         return 0;
1534 }
1535
1536 static void __exit capi_exit(void)
1537 {
1538         proc_exit();
1539
1540         device_destroy(capi_class, MKDEV(capi_major, 0));
1541         class_destroy(capi_class);
1542         unregister_chrdev(capi_major, "capi20");
1543
1544         capinc_tty_exit();
1545 }
1546
1547 module_init(capi_init);
1548 module_exit(capi_exit);