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perf: Use generic sample reordering in perf trace
[linux-2.6/libata-dev.git] / drivers / isdn / capi / capi.c
blobee5837522f5abff83922ed1dbb417f81e8e5d951
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 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 = (struct capidev *)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 = (struct capidev *)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 = (struct capidev *)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 inode *inode, struct file *file,
791 unsigned int cmd, unsigned long arg)
792 {
793 struct capidev *cdev = file->private_data;
794 capi_ioctl_struct data;
795 int retval = -EINVAL;
796 void __user *argp = (void __user *)arg;
797
798 switch (cmd) {
799 case CAPI_REGISTER:
800 mutex_lock(&cdev->lock);
801
802 if (cdev->ap.applid) {
803 retval = -EEXIST;
804 goto register_out;
805 }
806 if (copy_from_user(&cdev->ap.rparam, argp,
807 sizeof(struct capi_register_params))) {
808 retval = -EFAULT;
809 goto register_out;
810 }
811 cdev->ap.private = cdev;
812 cdev->ap.recv_message = capi_recv_message;
813 cdev->errcode = capi20_register(&cdev->ap);
814 retval = (int)cdev->ap.applid;
815 if (cdev->errcode) {
816 cdev->ap.applid = 0;
817 retval = -EIO;
818 }
819
820 register_out:
821 mutex_unlock(&cdev->lock);
822 return retval;
823
824 case CAPI_GET_VERSION:
825 {
826 if (copy_from_user(&data.contr, argp,
827 sizeof(data.contr)))
828 return -EFAULT;
829 cdev->errcode = capi20_get_version(data.contr, &data.version);
830 if (cdev->errcode)
831 return -EIO;
832 if (copy_to_user(argp, &data.version,
833 sizeof(data.version)))
834 return -EFAULT;
835 }
836 return 0;
837
838 case CAPI_GET_SERIAL:
839 {
840 if (copy_from_user(&data.contr, argp,
841 sizeof(data.contr)))
842 return -EFAULT;
843 cdev->errcode = capi20_get_serial (data.contr, data.serial);
844 if (cdev->errcode)
845 return -EIO;
846 if (copy_to_user(argp, data.serial,
847 sizeof(data.serial)))
848 return -EFAULT;
849 }
850 return 0;
851 case CAPI_GET_PROFILE:
852 {
853 if (copy_from_user(&data.contr, argp,
854 sizeof(data.contr)))
855 return -EFAULT;
856
857 if (data.contr == 0) {
858 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
859 if (cdev->errcode)
860 return -EIO;
861
862 retval = copy_to_user(argp,
863 &data.profile.ncontroller,
864 sizeof(data.profile.ncontroller));
865
866 } else {
867 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
868 if (cdev->errcode)
869 return -EIO;
870
871 retval = copy_to_user(argp, &data.profile,
872 sizeof(data.profile));
873 }
874 if (retval)
875 return -EFAULT;
876 }
877 return 0;
878
879 case CAPI_GET_MANUFACTURER:
880 {
881 if (copy_from_user(&data.contr, argp,
882 sizeof(data.contr)))
883 return -EFAULT;
884 cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer);
885 if (cdev->errcode)
886 return -EIO;
887
888 if (copy_to_user(argp, data.manufacturer,
889 sizeof(data.manufacturer)))
890 return -EFAULT;
891
892 }
893 return 0;
894 case CAPI_GET_ERRCODE:
895 data.errcode = cdev->errcode;
896 cdev->errcode = CAPI_NOERROR;
897 if (arg) {
898 if (copy_to_user(argp, &data.errcode,
899 sizeof(data.errcode)))
900 return -EFAULT;
901 }
902 return data.errcode;
903
904 case CAPI_INSTALLED:
905 if (capi20_isinstalled() == CAPI_NOERROR)
906 return 0;
907 return -ENXIO;
908
909 case CAPI_MANUFACTURER_CMD:
910 {
911 struct capi_manufacturer_cmd mcmd;
912 if (!capable(CAP_SYS_ADMIN))
913 return -EPERM;
914 if (copy_from_user(&mcmd, argp, sizeof(mcmd)))
915 return -EFAULT;
916 return capi20_manufacturer(mcmd.cmd, mcmd.data);
917 }
918 return 0;
919
920 case CAPI_SET_FLAGS:
921 case CAPI_CLR_FLAGS: {
922 unsigned userflags;
923
924 if (copy_from_user(&userflags, argp, sizeof(userflags)))
925 return -EFAULT;
926
927 mutex_lock(&cdev->lock);
928 if (cmd == CAPI_SET_FLAGS)
929 cdev->userflags |= userflags;
930 else
931 cdev->userflags &= ~userflags;
932 mutex_unlock(&cdev->lock);
933 return 0;
934 }
935 case CAPI_GET_FLAGS:
936 if (copy_to_user(argp, &cdev->userflags,
937 sizeof(cdev->userflags)))
938 return -EFAULT;
939 return 0;
940
941 case CAPI_NCCI_OPENCOUNT: {
942 struct capincci *nccip;
943 unsigned ncci;
944 int count = 0;
945
946 if (copy_from_user(&ncci, argp, sizeof(ncci)))
947 return -EFAULT;
948
949 mutex_lock(&cdev->lock);
950 nccip = capincci_find(cdev, (u32)ncci);
951 if (nccip)
952 count = capincci_minor_opencount(nccip);
953 mutex_unlock(&cdev->lock);
954 return count;
955 }
956
957 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
958 case CAPI_NCCI_GETUNIT: {
959 struct capincci *nccip;
960 struct capiminor *mp;
961 unsigned ncci;
962 int unit = -ESRCH;
963
964 if (copy_from_user(&ncci, argp, sizeof(ncci)))
965 return -EFAULT;
966
967 mutex_lock(&cdev->lock);
968 nccip = capincci_find(cdev, (u32)ncci);
969 if (nccip) {
970 mp = nccip->minorp;
971 if (mp)
972 unit = mp->minor;
973 }
974 mutex_unlock(&cdev->lock);
975 return unit;
976 }
977 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
978
979 default:
980 return -EINVAL;
981 }
982 }
983
984 static int capi_open(struct inode *inode, struct file *file)
985 {
986 struct capidev *cdev;
987
988 cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
989 if (!cdev)
990 return -ENOMEM;
991
992 mutex_init(&cdev->lock);
993 skb_queue_head_init(&cdev->recvqueue);
994 init_waitqueue_head(&cdev->recvwait);
995 INIT_LIST_HEAD(&cdev->nccis);
996 file->private_data = cdev;
997
998 mutex_lock(&capidev_list_lock);
999 list_add_tail(&cdev->list, &capidev_list);
1000 mutex_unlock(&capidev_list_lock);
1001
1002 return nonseekable_open(inode, file);
1003 }
1004
1005 static int capi_release(struct inode *inode, struct file *file)
1006 {
1007 struct capidev *cdev = file->private_data;
1008
1009 mutex_lock(&capidev_list_lock);
1010 list_del(&cdev->list);
1011 mutex_unlock(&capidev_list_lock);
1012
1013 if (cdev->ap.applid)
1014 capi20_release(&cdev->ap);
1015 skb_queue_purge(&cdev->recvqueue);
1016 capincci_free(cdev, 0xffffffff);
1017
1018 kfree(cdev);
1019 return 0;
1020 }
1021
1022 static const struct file_operations capi_fops =
1023 {
1024 .owner = THIS_MODULE,
1025 .llseek = no_llseek,
1026 .read = capi_read,
1027 .write = capi_write,
1028 .poll = capi_poll,
1029 .ioctl = capi_ioctl,
1030 .open = capi_open,
1031 .release = capi_release,
1032 };
1033
1034 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1035 /* -------- tty_operations for capincci ----------------------------- */
1036
1037 static int
1038 capinc_tty_install(struct tty_driver *driver, struct tty_struct *tty)
1039 {
1040 int idx = tty->index;
1041 struct capiminor *mp = capiminor_get(idx);
1042 int ret = tty_init_termios(tty);
1043
1044 if (ret == 0) {
1045 tty_driver_kref_get(driver);
1046 tty->count++;
1047 tty->driver_data = mp;
1048 driver->ttys[idx] = tty;
1049 } else
1050 capiminor_put(mp);
1051 return ret;
1052 }
1053
1054 static void capinc_tty_cleanup(struct tty_struct *tty)
1055 {
1056 struct capiminor *mp = tty->driver_data;
1057 tty->driver_data = NULL;
1058 capiminor_put(mp);
1059 }
1060
1061 static int capinc_tty_open(struct tty_struct *tty, struct file *filp)
1062 {
1063 struct capiminor *mp = tty->driver_data;
1064 int err;
1065
1066 err = tty_port_open(&mp->port, tty, filp);
1067 if (err)
1068 return err;
1069
1070 handle_minor_recv(mp);
1071 return 0;
1072 }
1073
1074 static void capinc_tty_close(struct tty_struct *tty, struct file *filp)
1075 {
1076 struct capiminor *mp = tty->driver_data;
1077
1078 tty_port_close(&mp->port, tty, filp);
1079 }
1080
1081 static int capinc_tty_write(struct tty_struct *tty,
1082 const unsigned char *buf, int count)
1083 {
1084 struct capiminor *mp = tty->driver_data;
1085 struct sk_buff *skb;
1086
1087 #ifdef _DEBUG_TTYFUNCS
1088 printk(KERN_DEBUG "capinc_tty_write(count=%d)\n", count);
1089 #endif
1090
1091 spin_lock_bh(&mp->outlock);
1092 skb = mp->outskb;
1093 if (skb) {
1094 mp->outskb = NULL;
1095 __skb_queue_tail(&mp->outqueue, skb);
1096 mp->outbytes += skb->len;
1097 }
1098
1099 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC);
1100 if (!skb) {
1101 printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n");
1102 spin_unlock_bh(&mp->outlock);
1103 return -ENOMEM;
1104 }
1105
1106 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1107 memcpy(skb_put(skb, count), buf, count);
1108
1109 __skb_queue_tail(&mp->outqueue, skb);
1110 mp->outbytes += skb->len;
1111 spin_unlock_bh(&mp->outlock);
1112
1113 handle_minor_send(mp);
1114
1115 return count;
1116 }
1117
1118 static int capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
1119 {
1120 struct capiminor *mp = tty->driver_data;
1121 bool invoke_send = false;
1122 struct sk_buff *skb;
1123 int ret = 1;
1124
1125 #ifdef _DEBUG_TTYFUNCS
1126 printk(KERN_DEBUG "capinc_put_char(%u)\n", ch);
1127 #endif
1128
1129 spin_lock_bh(&mp->outlock);
1130 skb = mp->outskb;
1131 if (skb) {
1132 if (skb_tailroom(skb) > 0) {
1133 *(skb_put(skb, 1)) = ch;
1134 goto unlock_out;
1135 }
1136 mp->outskb = NULL;
1137 __skb_queue_tail(&mp->outqueue, skb);
1138 mp->outbytes += skb->len;
1139 invoke_send = true;
1140 }
1141
1142 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+CAPI_MAX_BLKSIZE, GFP_ATOMIC);
1143 if (skb) {
1144 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1145 *(skb_put(skb, 1)) = ch;
1146 mp->outskb = skb;
1147 } else {
1148 printk(KERN_ERR "capinc_put_char: char %u lost\n", ch);
1149 ret = 0;
1150 }
1151
1152 unlock_out:
1153 spin_unlock_bh(&mp->outlock);
1154
1155 if (invoke_send)
1156 handle_minor_send(mp);
1157
1158 return ret;
1159 }
1160
1161 static void capinc_tty_flush_chars(struct tty_struct *tty)
1162 {
1163 struct capiminor *mp = tty->driver_data;
1164 struct sk_buff *skb;
1165
1166 #ifdef _DEBUG_TTYFUNCS
1167 printk(KERN_DEBUG "capinc_tty_flush_chars\n");
1168 #endif
1169
1170 spin_lock_bh(&mp->outlock);
1171 skb = mp->outskb;
1172 if (skb) {
1173 mp->outskb = NULL;
1174 __skb_queue_tail(&mp->outqueue, skb);
1175 mp->outbytes += skb->len;
1176 spin_unlock_bh(&mp->outlock);
1177
1178 handle_minor_send(mp);
1179 } else
1180 spin_unlock_bh(&mp->outlock);
1181
1182 handle_minor_recv(mp);
1183 }
1184
1185 static int capinc_tty_write_room(struct tty_struct *tty)
1186 {
1187 struct capiminor *mp = tty->driver_data;
1188 int room;
1189
1190 room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue);
1191 room *= CAPI_MAX_BLKSIZE;
1192 #ifdef _DEBUG_TTYFUNCS
1193 printk(KERN_DEBUG "capinc_tty_write_room = %d\n", room);
1194 #endif
1195 return room;
1196 }
1197
1198 static int capinc_tty_chars_in_buffer(struct tty_struct *tty)
1199 {
1200 struct capiminor *mp = tty->driver_data;
1201
1202 #ifdef _DEBUG_TTYFUNCS
1203 printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n",
1204 mp->outbytes, mp->nack,
1205 skb_queue_len(&mp->outqueue),
1206 skb_queue_len(&mp->inqueue));
1207 #endif
1208 return mp->outbytes;
1209 }
1210
1211 static int capinc_tty_ioctl(struct tty_struct *tty, struct file * file,
1212 unsigned int cmd, unsigned long arg)
1213 {
1214 int error = 0;
1215 switch (cmd) {
1216 default:
1217 error = n_tty_ioctl_helper(tty, file, cmd, arg);
1218 break;
1219 }
1220 return error;
1221 }
1222
1223 static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios * old)
1224 {
1225 #ifdef _DEBUG_TTYFUNCS
1226 printk(KERN_DEBUG "capinc_tty_set_termios\n");
1227 #endif
1228 }
1229
1230 static void capinc_tty_throttle(struct tty_struct *tty)
1231 {
1232 struct capiminor *mp = tty->driver_data;
1233 #ifdef _DEBUG_TTYFUNCS
1234 printk(KERN_DEBUG "capinc_tty_throttle\n");
1235 #endif
1236 mp->ttyinstop = 1;
1237 }
1238
1239 static void capinc_tty_unthrottle(struct tty_struct *tty)
1240 {
1241 struct capiminor *mp = tty->driver_data;
1242
1243 #ifdef _DEBUG_TTYFUNCS
1244 printk(KERN_DEBUG "capinc_tty_unthrottle\n");
1245 #endif
1246 mp->ttyinstop = 0;
1247 handle_minor_recv(mp);
1248 }
1249
1250 static void capinc_tty_stop(struct tty_struct *tty)
1251 {
1252 struct capiminor *mp = tty->driver_data;
1253
1254 #ifdef _DEBUG_TTYFUNCS
1255 printk(KERN_DEBUG "capinc_tty_stop\n");
1256 #endif
1257 mp->ttyoutstop = 1;
1258 }
1259
1260 static void capinc_tty_start(struct tty_struct *tty)
1261 {
1262 struct capiminor *mp = tty->driver_data;
1263
1264 #ifdef _DEBUG_TTYFUNCS
1265 printk(KERN_DEBUG "capinc_tty_start\n");
1266 #endif
1267 mp->ttyoutstop = 0;
1268 handle_minor_send(mp);
1269 }
1270
1271 static void capinc_tty_hangup(struct tty_struct *tty)
1272 {
1273 struct capiminor *mp = tty->driver_data;
1274
1275 #ifdef _DEBUG_TTYFUNCS
1276 printk(KERN_DEBUG "capinc_tty_hangup\n");
1277 #endif
1278 tty_port_hangup(&mp->port);
1279 }
1280
1281 static int capinc_tty_break_ctl(struct tty_struct *tty, int state)
1282 {
1283 #ifdef _DEBUG_TTYFUNCS
1284 printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state);
1285 #endif
1286 return 0;
1287 }
1288
1289 static void capinc_tty_flush_buffer(struct tty_struct *tty)
1290 {
1291 #ifdef _DEBUG_TTYFUNCS
1292 printk(KERN_DEBUG "capinc_tty_flush_buffer\n");
1293 #endif
1294 }
1295
1296 static void capinc_tty_set_ldisc(struct tty_struct *tty)
1297 {
1298 #ifdef _DEBUG_TTYFUNCS
1299 printk(KERN_DEBUG "capinc_tty_set_ldisc\n");
1300 #endif
1301 }
1302
1303 static void capinc_tty_send_xchar(struct tty_struct *tty, char ch)
1304 {
1305 #ifdef _DEBUG_TTYFUNCS
1306 printk(KERN_DEBUG "capinc_tty_send_xchar(%d)\n", ch);
1307 #endif
1308 }
1309
1310 static const struct tty_operations capinc_ops = {
1311 .open = capinc_tty_open,
1312 .close = capinc_tty_close,
1313 .write = capinc_tty_write,
1314 .put_char = capinc_tty_put_char,
1315 .flush_chars = capinc_tty_flush_chars,
1316 .write_room = capinc_tty_write_room,
1317 .chars_in_buffer = capinc_tty_chars_in_buffer,
1318 .ioctl = capinc_tty_ioctl,
1319 .set_termios = capinc_tty_set_termios,
1320 .throttle = capinc_tty_throttle,
1321 .unthrottle = capinc_tty_unthrottle,
1322 .stop = capinc_tty_stop,
1323 .start = capinc_tty_start,
1324 .hangup = capinc_tty_hangup,
1325 .break_ctl = capinc_tty_break_ctl,
1326 .flush_buffer = capinc_tty_flush_buffer,
1327 .set_ldisc = capinc_tty_set_ldisc,
1328 .send_xchar = capinc_tty_send_xchar,
1329 .install = capinc_tty_install,
1330 .cleanup = capinc_tty_cleanup,
1331 };
1332
1333 static int __init capinc_tty_init(void)
1334 {
1335 struct tty_driver *drv;
1336 int err;
1337
1338 if (capi_ttyminors > CAPINC_MAX_PORTS)
1339 capi_ttyminors = CAPINC_MAX_PORTS;
1340 if (capi_ttyminors <= 0)
1341 capi_ttyminors = CAPINC_NR_PORTS;
1342
1343 capiminors = kzalloc(sizeof(struct capi_minor *) * capi_ttyminors,
1344 GFP_KERNEL);
1345 if (!capiminors)
1346 return -ENOMEM;
1347
1348 drv = alloc_tty_driver(capi_ttyminors);
1349 if (!drv) {
1350 kfree(capiminors);
1351 return -ENOMEM;
1352 }
1353 drv->owner = THIS_MODULE;
1354 drv->driver_name = "capi_nc";
1355 drv->name = "capi";
1356 drv->major = 0;
1357 drv->minor_start = 0;
1358 drv->type = TTY_DRIVER_TYPE_SERIAL;
1359 drv->subtype = SERIAL_TYPE_NORMAL;
1360 drv->init_termios = tty_std_termios;
1361 drv->init_termios.c_iflag = ICRNL;
1362 drv->init_termios.c_oflag = OPOST | ONLCR;
1363 drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1364 drv->init_termios.c_lflag = 0;
1365 drv->flags =
1366 TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS |
1367 TTY_DRIVER_DYNAMIC_DEV;
1368 tty_set_operations(drv, &capinc_ops);
1369
1370 err = tty_register_driver(drv);
1371 if (err) {
1372 put_tty_driver(drv);
1373 kfree(capiminors);
1374 printk(KERN_ERR "Couldn't register capi_nc driver\n");
1375 return err;
1376 }
1377 capinc_tty_driver = drv;
1378 return 0;
1379 }
1380
1381 static void __exit capinc_tty_exit(void)
1382 {
1383 tty_unregister_driver(capinc_tty_driver);
1384 put_tty_driver(capinc_tty_driver);
1385 kfree(capiminors);
1386 }
1387
1388 #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
1389
1390 static inline int capinc_tty_init(void)
1391 {
1392 return 0;
1393 }
1394
1395 static inline void capinc_tty_exit(void) { }
1396
1397 #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
1398
1399 /* -------- /proc functions ----------------------------------------- */
1400
1401 /*
1402 * /proc/capi/capi20:
1403 * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt
1404 */
1405 static int capi20_proc_show(struct seq_file *m, void *v)
1406 {
1407 struct capidev *cdev;
1408 struct list_head *l;
1409
1410 mutex_lock(&capidev_list_lock);
1411 list_for_each(l, &capidev_list) {
1412 cdev = list_entry(l, struct capidev, list);
1413 seq_printf(m, "0 %d %lu %lu %lu %lu\n",
1414 cdev->ap.applid,
1415 cdev->ap.nrecvctlpkt,
1416 cdev->ap.nrecvdatapkt,
1417 cdev->ap.nsentctlpkt,
1418 cdev->ap.nsentdatapkt);
1419 }
1420 mutex_unlock(&capidev_list_lock);
1421 return 0;
1422 }
1423
1424 static int capi20_proc_open(struct inode *inode, struct file *file)
1425 {
1426 return single_open(file, capi20_proc_show, NULL);
1427 }
1428
1429 static const struct file_operations capi20_proc_fops = {
1430 .owner = THIS_MODULE,
1431 .open = capi20_proc_open,
1432 .read = seq_read,
1433 .llseek = seq_lseek,
1434 .release = single_release,
1435 };
1436
1437 /*
1438 * /proc/capi/capi20ncci:
1439 * applid ncci
1440 */
1441 static int capi20ncci_proc_show(struct seq_file *m, void *v)
1442 {
1443 struct capidev *cdev;
1444 struct capincci *np;
1445
1446 mutex_lock(&capidev_list_lock);
1447 list_for_each_entry(cdev, &capidev_list, list) {
1448 mutex_lock(&cdev->lock);
1449 list_for_each_entry(np, &cdev->nccis, list)
1450 seq_printf(m, "%d 0x%x\n", cdev->ap.applid, np->ncci);
1451 mutex_unlock(&cdev->lock);
1452 }
1453 mutex_unlock(&capidev_list_lock);
1454 return 0;
1455 }
1456
1457 static int capi20ncci_proc_open(struct inode *inode, struct file *file)
1458 {
1459 return single_open(file, capi20ncci_proc_show, NULL);
1460 }
1461
1462 static const struct file_operations capi20ncci_proc_fops = {
1463 .owner = THIS_MODULE,
1464 .open = capi20ncci_proc_open,
1465 .read = seq_read,
1466 .llseek = seq_lseek,
1467 .release = single_release,
1468 };
1469
1470 static void __init proc_init(void)
1471 {
1472 proc_create("capi/capi20", 0, NULL, &capi20_proc_fops);
1473 proc_create("capi/capi20ncci", 0, NULL, &capi20ncci_proc_fops);
1474 }
1475
1476 static void __exit proc_exit(void)
1477 {
1478 remove_proc_entry("capi/capi20", NULL);
1479 remove_proc_entry("capi/capi20ncci", NULL);
1480 }
1481
1482 /* -------- init function and module interface ---------------------- */
1483
1484
1485 static int __init capi_init(void)
1486 {
1487 const char *compileinfo;
1488 int major_ret;
1489
1490 major_ret = register_chrdev(capi_major, "capi20", &capi_fops);
1491 if (major_ret < 0) {
1492 printk(KERN_ERR "capi20: unable to get major %d\n", capi_major);
1493 return major_ret;
1494 }
1495 capi_class = class_create(THIS_MODULE, "capi");
1496 if (IS_ERR(capi_class)) {
1497 unregister_chrdev(capi_major, "capi20");
1498 return PTR_ERR(capi_class);
1499 }
1500
1501 device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi");
1502
1503 if (capinc_tty_init() < 0) {
1504 device_destroy(capi_class, MKDEV(capi_major, 0));
1505 class_destroy(capi_class);
1506 unregister_chrdev(capi_major, "capi20");
1507 return -ENOMEM;
1508 }
1509
1510 proc_init();
1511
1512 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
1513 compileinfo = " (middleware+capifs)";
1514 #elif defined(CONFIG_ISDN_CAPI_MIDDLEWARE)
1515 compileinfo = " (no capifs)";
1516 #else
1517 compileinfo = " (no middleware)";
1518 #endif
1519 printk(KERN_NOTICE "CAPI 2.0 started up with major %d%s\n",
1520 capi_major, compileinfo);
1521
1522 return 0;
1523 }
1524
1525 static void __exit capi_exit(void)
1526 {
1527 proc_exit();
1528
1529 device_destroy(capi_class, MKDEV(capi_major, 0));
1530 class_destroy(capi_class);
1531 unregister_chrdev(capi_major, "capi20");
1532
1533 capinc_tty_exit();
1534 }
1535
1536 module_init(capi_init);
1537 module_exit(capi_exit);
Linux 2.6 libata-dev (mirror)