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/compiler.h> |
13 | #include <linux/module.h> |
14 | #include <linux/errno.h> |
15 | #include <linux/kernel.h> |
16 | #include <linux/major.h> |
17 | #include <linux/sched.h> |
18 | #include <linux/slab.h> |
19 | #include <linux/fcntl.h> |
20 | #include <linux/fs.h> |
21 | #include <linux/signal.h> |
22 | #include <linux/mutex.h> |
23 | #include <linux/mm.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/ppp-ioctl.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 | MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface" ); |
43 | MODULE_AUTHOR("Carsten Paeth" ); |
44 | MODULE_LICENSE("GPL" ); |
45 | |
46 | /* -------- driver information -------------------------------------- */ |
47 | |
48 | static DEFINE_MUTEX(capi_mutex); |
49 | static struct class *capi_class; |
50 | static int capi_major = 68; /* allocated */ |
51 | |
52 | module_param_named(major, capi_major, uint, 0); |
53 | |
54 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
55 | #define CAPINC_NR_PORTS 32 |
56 | #define CAPINC_MAX_PORTS 256 |
57 | |
58 | static int capi_ttyminors = CAPINC_NR_PORTS; |
59 | |
60 | module_param_named(ttyminors, capi_ttyminors, uint, 0); |
61 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
62 | |
63 | /* -------- defines ------------------------------------------------- */ |
64 | |
65 | #define CAPINC_MAX_RECVQUEUE 10 |
66 | #define CAPINC_MAX_SENDQUEUE 10 |
67 | #define CAPI_MAX_BLKSIZE 2048 |
68 | |
69 | /* -------- data structures ----------------------------------------- */ |
70 | |
71 | struct capidev; |
72 | struct capincci; |
73 | struct capiminor; |
74 | |
75 | struct ackqueue_entry { |
76 | struct list_head list; |
77 | u16 datahandle; |
78 | }; |
79 | |
80 | struct capiminor { |
81 | unsigned int minor; |
82 | |
83 | struct capi20_appl *ap; |
84 | u32 ncci; |
85 | atomic_t datahandle; |
86 | atomic_t msgid; |
87 | |
88 | struct tty_port port; |
89 | int ttyinstop; |
90 | int ttyoutstop; |
91 | |
92 | struct sk_buff_head inqueue; |
93 | |
94 | struct sk_buff_head outqueue; |
95 | int outbytes; |
96 | struct sk_buff *outskb; |
97 | spinlock_t outlock; |
98 | |
99 | /* transmit path */ |
100 | struct list_head ackqueue; |
101 | int nack; |
102 | spinlock_t ackqlock; |
103 | }; |
104 | |
105 | struct capincci { |
106 | struct list_head list; |
107 | u32 ncci; |
108 | struct capidev *cdev; |
109 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
110 | struct capiminor *minorp; |
111 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
112 | }; |
113 | |
114 | struct capidev { |
115 | struct list_head list; |
116 | struct capi20_appl ap; |
117 | u16 errcode; |
118 | unsigned userflags; |
119 | |
120 | struct sk_buff_head recvqueue; |
121 | wait_queue_head_t recvwait; |
122 | |
123 | struct list_head nccis; |
124 | |
125 | struct mutex lock; |
126 | }; |
127 | |
128 | /* -------- global variables ---------------------------------------- */ |
129 | |
130 | static DEFINE_MUTEX(capidev_list_lock); |
131 | static LIST_HEAD(capidev_list); |
132 | |
133 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
134 | |
135 | static DEFINE_SPINLOCK(capiminors_lock); |
136 | static struct capiminor **capiminors; |
137 | |
138 | static struct tty_driver *capinc_tty_driver; |
139 | |
140 | /* -------- datahandles --------------------------------------------- */ |
141 | |
142 | static int capiminor_add_ack(struct capiminor *mp, u16 datahandle) |
143 | { |
144 | struct ackqueue_entry *n; |
145 | |
146 | n = kmalloc(sizeof(*n), GFP_ATOMIC); |
147 | if (unlikely(!n)) { |
148 | printk(KERN_ERR "capi: alloc datahandle failed\n" ); |
149 | return -1; |
150 | } |
151 | n->datahandle = datahandle; |
152 | INIT_LIST_HEAD(&n->list); |
153 | spin_lock_bh(&mp->ackqlock); |
154 | list_add_tail(&n->list, &mp->ackqueue); |
155 | mp->nack++; |
156 | spin_unlock_bh(&mp->ackqlock); |
157 | return 0; |
158 | } |
159 | |
160 | static int capiminor_del_ack(struct capiminor *mp, u16 datahandle) |
161 | { |
162 | struct ackqueue_entry *p, *tmp; |
163 | |
164 | spin_lock_bh(&mp->ackqlock); |
165 | list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { |
166 | if (p->datahandle == datahandle) { |
167 | list_del(&p->list); |
168 | mp->nack--; |
169 | spin_unlock_bh(&mp->ackqlock); |
170 | kfree(p); |
171 | return 0; |
172 | } |
173 | } |
174 | spin_unlock_bh(&mp->ackqlock); |
175 | return -1; |
176 | } |
177 | |
178 | static void capiminor_del_all_ack(struct capiminor *mp) |
179 | { |
180 | struct ackqueue_entry *p, *tmp; |
181 | |
182 | list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { |
183 | list_del(&p->list); |
184 | kfree(p); |
185 | mp->nack--; |
186 | } |
187 | } |
188 | |
189 | |
190 | /* -------- struct capiminor ---------------------------------------- */ |
191 | |
192 | static void capiminor_destroy(struct tty_port *port) |
193 | { |
194 | struct capiminor *mp = container_of(port, struct capiminor, port); |
195 | |
196 | kfree_skb(mp->outskb); |
197 | skb_queue_purge(&mp->inqueue); |
198 | skb_queue_purge(&mp->outqueue); |
199 | capiminor_del_all_ack(mp); |
200 | kfree(mp); |
201 | } |
202 | |
203 | static const struct tty_port_operations capiminor_port_ops = { |
204 | .destruct = capiminor_destroy, |
205 | }; |
206 | |
207 | static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci) |
208 | { |
209 | struct capiminor *mp; |
210 | struct device *dev; |
211 | unsigned int minor; |
212 | |
213 | mp = kzalloc(sizeof(*mp), GFP_KERNEL); |
214 | if (!mp) { |
215 | printk(KERN_ERR "capi: can't alloc capiminor\n" ); |
216 | return NULL; |
217 | } |
218 | |
219 | mp->ap = ap; |
220 | mp->ncci = ncci; |
221 | INIT_LIST_HEAD(&mp->ackqueue); |
222 | spin_lock_init(&mp->ackqlock); |
223 | |
224 | skb_queue_head_init(&mp->inqueue); |
225 | skb_queue_head_init(&mp->outqueue); |
226 | spin_lock_init(&mp->outlock); |
227 | |
228 | tty_port_init(&mp->port); |
229 | mp->port.ops = &capiminor_port_ops; |
230 | |
231 | /* Allocate the least unused minor number. */ |
232 | spin_lock(&capiminors_lock); |
233 | for (minor = 0; minor < capi_ttyminors; minor++) |
234 | if (!capiminors[minor]) { |
235 | capiminors[minor] = mp; |
236 | break; |
237 | } |
238 | spin_unlock(&capiminors_lock); |
239 | |
240 | if (minor == capi_ttyminors) { |
241 | printk(KERN_NOTICE "capi: out of minors\n" ); |
242 | goto err_out1; |
243 | } |
244 | |
245 | mp->minor = minor; |
246 | |
247 | dev = tty_port_register_device(&mp->port, capinc_tty_driver, minor, |
248 | NULL); |
249 | if (IS_ERR(dev)) |
250 | goto err_out2; |
251 | |
252 | return mp; |
253 | |
254 | err_out2: |
255 | spin_lock(&capiminors_lock); |
256 | capiminors[minor] = NULL; |
257 | spin_unlock(&capiminors_lock); |
258 | |
259 | err_out1: |
260 | tty_port_put(&mp->port); |
261 | return NULL; |
262 | } |
263 | |
264 | static struct capiminor *capiminor_get(unsigned int minor) |
265 | { |
266 | struct capiminor *mp; |
267 | |
268 | spin_lock(&capiminors_lock); |
269 | mp = capiminors[minor]; |
270 | if (mp) |
271 | tty_port_get(&mp->port); |
272 | spin_unlock(&capiminors_lock); |
273 | |
274 | return mp; |
275 | } |
276 | |
277 | static inline void capiminor_put(struct capiminor *mp) |
278 | { |
279 | tty_port_put(&mp->port); |
280 | } |
281 | |
282 | static void capiminor_free(struct capiminor *mp) |
283 | { |
284 | tty_unregister_device(capinc_tty_driver, mp->minor); |
285 | |
286 | spin_lock(&capiminors_lock); |
287 | capiminors[mp->minor] = NULL; |
288 | spin_unlock(&capiminors_lock); |
289 | |
290 | capiminor_put(mp); |
291 | } |
292 | |
293 | /* -------- struct capincci ----------------------------------------- */ |
294 | |
295 | static void capincci_alloc_minor(struct capidev *cdev, struct capincci *np) |
296 | { |
297 | if (cdev->userflags & CAPIFLAG_HIGHJACKING) |
298 | np->minorp = capiminor_alloc(&cdev->ap, np->ncci); |
299 | } |
300 | |
301 | static void capincci_free_minor(struct capincci *np) |
302 | { |
303 | struct capiminor *mp = np->minorp; |
304 | struct tty_struct *tty; |
305 | |
306 | if (mp) { |
307 | tty = tty_port_tty_get(&mp->port); |
308 | if (tty) { |
309 | tty_vhangup(tty); |
310 | tty_kref_put(tty); |
311 | } |
312 | |
313 | capiminor_free(mp); |
314 | } |
315 | } |
316 | |
317 | static inline unsigned int capincci_minor_opencount(struct capincci *np) |
318 | { |
319 | struct capiminor *mp = np->minorp; |
320 | unsigned int count = 0; |
321 | struct tty_struct *tty; |
322 | |
323 | if (mp) { |
324 | tty = tty_port_tty_get(&mp->port); |
325 | if (tty) { |
326 | count = tty->count; |
327 | tty_kref_put(tty); |
328 | } |
329 | } |
330 | return count; |
331 | } |
332 | |
333 | #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
334 | |
335 | static inline void |
336 | capincci_alloc_minor(struct capidev *cdev, struct capincci *np) { } |
337 | static inline void capincci_free_minor(struct capincci *np) { } |
338 | |
339 | #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
340 | |
341 | static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci) |
342 | { |
343 | struct capincci *np; |
344 | |
345 | np = kzalloc(sizeof(*np), GFP_KERNEL); |
346 | if (!np) |
347 | return NULL; |
348 | np->ncci = ncci; |
349 | np->cdev = cdev; |
350 | |
351 | capincci_alloc_minor(cdev, np); |
352 | |
353 | list_add_tail(&np->list, &cdev->nccis); |
354 | |
355 | return np; |
356 | } |
357 | |
358 | static void capincci_free(struct capidev *cdev, u32 ncci) |
359 | { |
360 | struct capincci *np, *tmp; |
361 | |
362 | list_for_each_entry_safe(np, tmp, &cdev->nccis, list) |
363 | if (ncci == 0xffffffff || np->ncci == ncci) { |
364 | capincci_free_minor(np); |
365 | list_del(&np->list); |
366 | kfree(np); |
367 | } |
368 | } |
369 | |
370 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
371 | static struct capincci *capincci_find(struct capidev *cdev, u32 ncci) |
372 | { |
373 | struct capincci *np; |
374 | |
375 | list_for_each_entry(np, &cdev->nccis, list) |
376 | if (np->ncci == ncci) |
377 | return np; |
378 | return NULL; |
379 | } |
380 | |
381 | /* -------- handle data queue --------------------------------------- */ |
382 | |
383 | static struct sk_buff * |
384 | gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb) |
385 | { |
386 | struct sk_buff *nskb; |
387 | nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_KERNEL); |
388 | if (nskb) { |
389 | u16 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 4 + 2); |
390 | unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN); |
391 | capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN); |
392 | capimsg_setu16(s, 2, mp->ap->applid); |
393 | capimsg_setu8 (s, 4, CAPI_DATA_B3); |
394 | capimsg_setu8 (s, 5, CAPI_RESP); |
395 | capimsg_setu16(s, 6, atomic_inc_return(&mp->msgid)); |
396 | capimsg_setu32(s, 8, mp->ncci); |
397 | capimsg_setu16(s, 12, datahandle); |
398 | } |
399 | return nskb; |
400 | } |
401 | |
402 | static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb) |
403 | { |
404 | unsigned int datalen = skb->len - CAPIMSG_LEN(skb->data); |
405 | struct tty_struct *tty; |
406 | struct sk_buff *nskb; |
407 | u16 errcode, datahandle; |
408 | struct tty_ldisc *ld; |
409 | int ret = -1; |
410 | |
411 | tty = tty_port_tty_get(&mp->port); |
412 | if (!tty) { |
413 | pr_debug("capi: currently no receiver\n" ); |
414 | return -1; |
415 | } |
416 | |
417 | ld = tty_ldisc_ref(tty); |
418 | if (!ld) { |
419 | /* fatal error, do not requeue */ |
420 | ret = 0; |
421 | kfree_skb(skb); |
422 | goto deref_tty; |
423 | } |
424 | |
425 | if (ld->ops->receive_buf == NULL) { |
426 | pr_debug("capi: ldisc has no receive_buf function\n" ); |
427 | /* fatal error, do not requeue */ |
428 | goto free_skb; |
429 | } |
430 | if (mp->ttyinstop) { |
431 | pr_debug("capi: recv tty throttled\n" ); |
432 | goto deref_ldisc; |
433 | } |
434 | |
435 | if (tty->receive_room < datalen) { |
436 | pr_debug("capi: no room in tty\n" ); |
437 | goto deref_ldisc; |
438 | } |
439 | |
440 | nskb = gen_data_b3_resp_for(mp, skb); |
441 | if (!nskb) { |
442 | printk(KERN_ERR "capi: gen_data_b3_resp failed\n" ); |
443 | goto deref_ldisc; |
444 | } |
445 | |
446 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4); |
447 | |
448 | errcode = capi20_put_message(mp->ap, nskb); |
449 | |
450 | if (errcode == CAPI_NOERROR) { |
451 | skb_pull(skb, CAPIMSG_LEN(skb->data)); |
452 | pr_debug("capi: DATA_B3_RESP %u len=%d => ldisc\n" , |
453 | datahandle, skb->len); |
454 | ld->ops->receive_buf(tty, skb->data, NULL, skb->len); |
455 | } else { |
456 | printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n" , |
457 | errcode); |
458 | kfree_skb(nskb); |
459 | |
460 | if (errcode == CAPI_SENDQUEUEFULL) |
461 | goto deref_ldisc; |
462 | } |
463 | |
464 | free_skb: |
465 | ret = 0; |
466 | kfree_skb(skb); |
467 | |
468 | deref_ldisc: |
469 | tty_ldisc_deref(ld); |
470 | |
471 | deref_tty: |
472 | tty_kref_put(tty); |
473 | return ret; |
474 | } |
475 | |
476 | static void handle_minor_recv(struct capiminor *mp) |
477 | { |
478 | struct sk_buff *skb; |
479 | |
480 | while ((skb = skb_dequeue(&mp->inqueue)) != NULL) |
481 | if (handle_recv_skb(mp, skb) < 0) { |
482 | skb_queue_head(&mp->inqueue, skb); |
483 | return; |
484 | } |
485 | } |
486 | |
487 | static void handle_minor_send(struct capiminor *mp) |
488 | { |
489 | struct tty_struct *tty; |
490 | struct sk_buff *skb; |
491 | u16 len; |
492 | u16 errcode; |
493 | u16 datahandle; |
494 | |
495 | tty = tty_port_tty_get(&mp->port); |
496 | if (!tty) |
497 | return; |
498 | |
499 | if (mp->ttyoutstop) { |
500 | pr_debug("capi: send: tty stopped\n" ); |
501 | tty_kref_put(tty); |
502 | return; |
503 | } |
504 | |
505 | while (1) { |
506 | spin_lock_bh(&mp->outlock); |
507 | skb = __skb_dequeue(&mp->outqueue); |
508 | if (!skb) { |
509 | spin_unlock_bh(&mp->outlock); |
510 | break; |
511 | } |
512 | len = (u16)skb->len; |
513 | mp->outbytes -= len; |
514 | spin_unlock_bh(&mp->outlock); |
515 | |
516 | datahandle = atomic_inc_return(&mp->datahandle); |
517 | skb_push(skb, CAPI_DATA_B3_REQ_LEN); |
518 | memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN); |
519 | capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN); |
520 | capimsg_setu16(skb->data, 2, mp->ap->applid); |
521 | capimsg_setu8 (skb->data, 4, CAPI_DATA_B3); |
522 | capimsg_setu8 (skb->data, 5, CAPI_REQ); |
523 | capimsg_setu16(skb->data, 6, atomic_inc_return(&mp->msgid)); |
524 | capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */ |
525 | capimsg_setu32(skb->data, 12, (u32)(long)skb->data);/* Data32 */ |
526 | capimsg_setu16(skb->data, 16, len); /* Data length */ |
527 | capimsg_setu16(skb->data, 18, datahandle); |
528 | capimsg_setu16(skb->data, 20, 0); /* Flags */ |
529 | |
530 | if (capiminor_add_ack(mp, datahandle) < 0) { |
531 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); |
532 | |
533 | spin_lock_bh(&mp->outlock); |
534 | __skb_queue_head(&mp->outqueue, skb); |
535 | mp->outbytes += len; |
536 | spin_unlock_bh(&mp->outlock); |
537 | |
538 | break; |
539 | } |
540 | errcode = capi20_put_message(mp->ap, skb); |
541 | if (errcode == CAPI_NOERROR) { |
542 | pr_debug("capi: DATA_B3_REQ %u len=%u\n" , |
543 | datahandle, len); |
544 | continue; |
545 | } |
546 | capiminor_del_ack(mp, datahandle); |
547 | |
548 | if (errcode == CAPI_SENDQUEUEFULL) { |
549 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); |
550 | |
551 | spin_lock_bh(&mp->outlock); |
552 | __skb_queue_head(&mp->outqueue, skb); |
553 | mp->outbytes += len; |
554 | spin_unlock_bh(&mp->outlock); |
555 | |
556 | break; |
557 | } |
558 | |
559 | /* ups, drop packet */ |
560 | printk(KERN_ERR "capi: put_message = %x\n" , errcode); |
561 | kfree_skb(skb); |
562 | } |
563 | tty_kref_put(tty); |
564 | } |
565 | |
566 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
567 | /* -------- function called by lower level -------------------------- */ |
568 | |
569 | static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb) |
570 | { |
571 | struct capidev *cdev = ap->private; |
572 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
573 | struct capiminor *mp; |
574 | u16 datahandle; |
575 | struct capincci *np; |
576 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
577 | |
578 | mutex_lock(&cdev->lock); |
579 | |
580 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) { |
581 | u16 info = CAPIMSG_U16(skb->data, 12); // Info field |
582 | if ((info & 0xff00) == 0) |
583 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); |
584 | } |
585 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) |
586 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); |
587 | |
588 | if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) { |
589 | skb_queue_tail(&cdev->recvqueue, skb); |
590 | wake_up_interruptible(&cdev->recvwait); |
591 | goto unlock_out; |
592 | } |
593 | |
594 | #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE |
595 | skb_queue_tail(&cdev->recvqueue, skb); |
596 | wake_up_interruptible(&cdev->recvwait); |
597 | |
598 | #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
599 | |
600 | np = capincci_find(cdev, CAPIMSG_CONTROL(skb->data)); |
601 | if (!np) { |
602 | printk(KERN_ERR "BUG: capi_signal: ncci not found\n" ); |
603 | skb_queue_tail(&cdev->recvqueue, skb); |
604 | wake_up_interruptible(&cdev->recvwait); |
605 | goto unlock_out; |
606 | } |
607 | |
608 | mp = np->minorp; |
609 | if (!mp) { |
610 | skb_queue_tail(&cdev->recvqueue, skb); |
611 | wake_up_interruptible(&cdev->recvwait); |
612 | goto unlock_out; |
613 | } |
614 | if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) { |
615 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 4 + 2); |
616 | pr_debug("capi_signal: DATA_B3_IND %u len=%d\n" , |
617 | datahandle, skb->len-CAPIMSG_LEN(skb->data)); |
618 | skb_queue_tail(&mp->inqueue, skb); |
619 | |
620 | handle_minor_recv(mp); |
621 | |
622 | } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) { |
623 | |
624 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4); |
625 | pr_debug("capi_signal: DATA_B3_CONF %u 0x%x\n" , |
626 | datahandle, |
627 | CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 2)); |
628 | kfree_skb(skb); |
629 | capiminor_del_ack(mp, datahandle); |
630 | tty_port_tty_wakeup(&mp->port); |
631 | handle_minor_send(mp); |
632 | |
633 | } else { |
634 | /* ups, let capi application handle it :-) */ |
635 | skb_queue_tail(&cdev->recvqueue, skb); |
636 | wake_up_interruptible(&cdev->recvwait); |
637 | } |
638 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
639 | |
640 | unlock_out: |
641 | mutex_unlock(&cdev->lock); |
642 | } |
643 | |
644 | /* -------- file_operations for capidev ----------------------------- */ |
645 | |
646 | static ssize_t |
647 | capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) |
648 | { |
649 | struct capidev *cdev = file->private_data; |
650 | struct sk_buff *skb; |
651 | size_t copied; |
652 | int err; |
653 | |
654 | if (!cdev->ap.applid) |
655 | return -ENODEV; |
656 | |
657 | skb = skb_dequeue(&cdev->recvqueue); |
658 | if (!skb) { |
659 | if (file->f_flags & O_NONBLOCK) |
660 | return -EAGAIN; |
661 | err = wait_event_interruptible(cdev->recvwait, |
662 | (skb = skb_dequeue(&cdev->recvqueue))); |
663 | if (err) |
664 | return err; |
665 | } |
666 | if (skb->len > count) { |
667 | skb_queue_head(&cdev->recvqueue, skb); |
668 | return -EMSGSIZE; |
669 | } |
670 | if (copy_to_user(buf, skb->data, skb->len)) { |
671 | skb_queue_head(&cdev->recvqueue, skb); |
672 | return -EFAULT; |
673 | } |
674 | copied = skb->len; |
675 | |
676 | kfree_skb(skb); |
677 | |
678 | return copied; |
679 | } |
680 | |
681 | static ssize_t |
682 | capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) |
683 | { |
684 | struct capidev *cdev = file->private_data; |
685 | struct sk_buff *skb; |
686 | u16 mlen; |
687 | |
688 | if (!cdev->ap.applid) |
689 | return -ENODEV; |
690 | |
691 | skb = alloc_skb(count, GFP_USER); |
692 | if (!skb) |
693 | return -ENOMEM; |
694 | |
695 | if (copy_from_user(skb_put(skb, count), buf, count)) { |
696 | kfree_skb(skb); |
697 | return -EFAULT; |
698 | } |
699 | mlen = CAPIMSG_LEN(skb->data); |
700 | if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) { |
701 | if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) { |
702 | kfree_skb(skb); |
703 | return -EINVAL; |
704 | } |
705 | } else { |
706 | if (mlen != count) { |
707 | kfree_skb(skb); |
708 | return -EINVAL; |
709 | } |
710 | } |
711 | CAPIMSG_SETAPPID(skb->data, cdev->ap.applid); |
712 | |
713 | if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) { |
714 | mutex_lock(&cdev->lock); |
715 | capincci_free(cdev, CAPIMSG_NCCI(skb->data)); |
716 | mutex_unlock(&cdev->lock); |
717 | } |
718 | |
719 | cdev->errcode = capi20_put_message(&cdev->ap, skb); |
720 | |
721 | if (cdev->errcode) { |
722 | kfree_skb(skb); |
723 | return -EIO; |
724 | } |
725 | return count; |
726 | } |
727 | |
728 | static __poll_t |
729 | capi_poll(struct file *file, poll_table *wait) |
730 | { |
731 | struct capidev *cdev = file->private_data; |
732 | __poll_t mask = 0; |
733 | |
734 | if (!cdev->ap.applid) |
735 | return EPOLLERR; |
736 | |
737 | poll_wait(file, &(cdev->recvwait), wait); |
738 | mask = EPOLLOUT | EPOLLWRNORM; |
739 | if (!skb_queue_empty(&cdev->recvqueue)) |
740 | mask |= EPOLLIN | EPOLLRDNORM; |
741 | return mask; |
742 | } |
743 | |
744 | static int |
745 | capi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
746 | { |
747 | struct capidev *cdev = file->private_data; |
748 | capi_ioctl_struct data; |
749 | int retval = -EINVAL; |
750 | void __user *argp = (void __user *)arg; |
751 | |
752 | switch (cmd) { |
753 | case CAPI_REGISTER: |
754 | mutex_lock(&cdev->lock); |
755 | |
756 | if (cdev->ap.applid) { |
757 | retval = -EEXIST; |
758 | goto register_out; |
759 | } |
760 | if (copy_from_user(&cdev->ap.rparam, argp, |
761 | sizeof(struct capi_register_params))) { |
762 | retval = -EFAULT; |
763 | goto register_out; |
764 | } |
765 | cdev->ap.private = cdev; |
766 | cdev->ap.recv_message = capi_recv_message; |
767 | cdev->errcode = capi20_register(&cdev->ap); |
768 | retval = (int)cdev->ap.applid; |
769 | if (cdev->errcode) { |
770 | cdev->ap.applid = 0; |
771 | retval = -EIO; |
772 | } |
773 | |
774 | register_out: |
775 | mutex_unlock(&cdev->lock); |
776 | return retval; |
777 | |
778 | case CAPI_GET_VERSION: |
779 | if (copy_from_user(&data.contr, argp, |
780 | sizeof(data.contr))) |
781 | return -EFAULT; |
782 | cdev->errcode = capi20_get_version(data.contr, &data.version); |
783 | if (cdev->errcode) |
784 | return -EIO; |
785 | if (copy_to_user(argp, &data.version, |
786 | sizeof(data.version))) |
787 | return -EFAULT; |
788 | return 0; |
789 | |
790 | case CAPI_GET_SERIAL: |
791 | if (copy_from_user(&data.contr, argp, |
792 | sizeof(data.contr))) |
793 | return -EFAULT; |
794 | cdev->errcode = capi20_get_serial(data.contr, data.serial); |
795 | if (cdev->errcode) |
796 | return -EIO; |
797 | if (copy_to_user(argp, data.serial, |
798 | sizeof(data.serial))) |
799 | return -EFAULT; |
800 | return 0; |
801 | |
802 | case CAPI_GET_PROFILE: |
803 | if (copy_from_user(&data.contr, argp, |
804 | sizeof(data.contr))) |
805 | return -EFAULT; |
806 | |
807 | if (data.contr == 0) { |
808 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); |
809 | if (cdev->errcode) |
810 | return -EIO; |
811 | |
812 | retval = copy_to_user(argp, |
813 | &data.profile.ncontroller, |
814 | sizeof(data.profile.ncontroller)); |
815 | |
816 | } else { |
817 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); |
818 | if (cdev->errcode) |
819 | return -EIO; |
820 | |
821 | retval = copy_to_user(argp, &data.profile, |
822 | sizeof(data.profile)); |
823 | } |
824 | if (retval) |
825 | return -EFAULT; |
826 | return 0; |
827 | |
828 | case CAPI_GET_MANUFACTURER: |
829 | if (copy_from_user(&data.contr, argp, |
830 | sizeof(data.contr))) |
831 | return -EFAULT; |
832 | cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer); |
833 | if (cdev->errcode) |
834 | return -EIO; |
835 | |
836 | if (copy_to_user(argp, data.manufacturer, |
837 | sizeof(data.manufacturer))) |
838 | return -EFAULT; |
839 | |
840 | return 0; |
841 | |
842 | case CAPI_GET_ERRCODE: |
843 | data.errcode = cdev->errcode; |
844 | cdev->errcode = CAPI_NOERROR; |
845 | if (arg) { |
846 | if (copy_to_user(argp, &data.errcode, |
847 | sizeof(data.errcode))) |
848 | return -EFAULT; |
849 | } |
850 | return data.errcode; |
851 | |
852 | case CAPI_INSTALLED: |
853 | if (capi20_isinstalled() == CAPI_NOERROR) |
854 | return 0; |
855 | return -ENXIO; |
856 | |
857 | case CAPI_MANUFACTURER_CMD: { |
858 | struct capi_manufacturer_cmd mcmd; |
859 | if (!capable(CAP_SYS_ADMIN)) |
860 | return -EPERM; |
861 | if (copy_from_user(&mcmd, argp, sizeof(mcmd))) |
862 | return -EFAULT; |
863 | return capi20_manufacturer(mcmd.cmd, mcmd.data); |
864 | } |
865 | case CAPI_SET_FLAGS: |
866 | case CAPI_CLR_FLAGS: { |
867 | unsigned userflags; |
868 | |
869 | if (copy_from_user(&userflags, argp, sizeof(userflags))) |
870 | return -EFAULT; |
871 | |
872 | mutex_lock(&cdev->lock); |
873 | if (cmd == CAPI_SET_FLAGS) |
874 | cdev->userflags |= userflags; |
875 | else |
876 | cdev->userflags &= ~userflags; |
877 | mutex_unlock(&cdev->lock); |
878 | return 0; |
879 | } |
880 | case CAPI_GET_FLAGS: |
881 | if (copy_to_user(argp, &cdev->userflags, |
882 | sizeof(cdev->userflags))) |
883 | return -EFAULT; |
884 | return 0; |
885 | |
886 | #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE |
887 | case CAPI_NCCI_OPENCOUNT: |
888 | return 0; |
889 | |
890 | #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
891 | case CAPI_NCCI_OPENCOUNT: { |
892 | struct capincci *nccip; |
893 | unsigned ncci; |
894 | int count = 0; |
895 | |
896 | if (copy_from_user(&ncci, argp, sizeof(ncci))) |
897 | return -EFAULT; |
898 | |
899 | mutex_lock(&cdev->lock); |
900 | nccip = capincci_find(cdev, (u32)ncci); |
901 | if (nccip) |
902 | count = capincci_minor_opencount(nccip); |
903 | mutex_unlock(&cdev->lock); |
904 | return count; |
905 | } |
906 | |
907 | case CAPI_NCCI_GETUNIT: { |
908 | struct capincci *nccip; |
909 | struct capiminor *mp; |
910 | unsigned ncci; |
911 | int unit = -ESRCH; |
912 | |
913 | if (copy_from_user(&ncci, argp, sizeof(ncci))) |
914 | return -EFAULT; |
915 | |
916 | mutex_lock(&cdev->lock); |
917 | nccip = capincci_find(cdev, (u32)ncci); |
918 | if (nccip) { |
919 | mp = nccip->minorp; |
920 | if (mp) |
921 | unit = mp->minor; |
922 | } |
923 | mutex_unlock(&cdev->lock); |
924 | return unit; |
925 | } |
926 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
927 | |
928 | default: |
929 | return -EINVAL; |
930 | } |
931 | } |
932 | |
933 | static long |
934 | capi_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
935 | { |
936 | int ret; |
937 | |
938 | mutex_lock(&capi_mutex); |
939 | ret = capi_ioctl(file, cmd, arg); |
940 | mutex_unlock(&capi_mutex); |
941 | |
942 | return ret; |
943 | } |
944 | |
945 | static int capi_open(struct inode *inode, struct file *file) |
946 | { |
947 | struct capidev *cdev; |
948 | |
949 | cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); |
950 | if (!cdev) |
951 | return -ENOMEM; |
952 | |
953 | mutex_init(&cdev->lock); |
954 | skb_queue_head_init(&cdev->recvqueue); |
955 | init_waitqueue_head(&cdev->recvwait); |
956 | INIT_LIST_HEAD(&cdev->nccis); |
957 | file->private_data = cdev; |
958 | |
959 | mutex_lock(&capidev_list_lock); |
960 | list_add_tail(&cdev->list, &capidev_list); |
961 | mutex_unlock(&capidev_list_lock); |
962 | |
963 | return nonseekable_open(inode, file); |
964 | } |
965 | |
966 | static int capi_release(struct inode *inode, struct file *file) |
967 | { |
968 | struct capidev *cdev = file->private_data; |
969 | |
970 | mutex_lock(&capidev_list_lock); |
971 | list_del(&cdev->list); |
972 | mutex_unlock(&capidev_list_lock); |
973 | |
974 | if (cdev->ap.applid) |
975 | capi20_release(&cdev->ap); |
976 | skb_queue_purge(&cdev->recvqueue); |
977 | capincci_free(cdev, 0xffffffff); |
978 | |
979 | kfree(cdev); |
980 | return 0; |
981 | } |
982 | |
983 | static const struct file_operations capi_fops = |
984 | { |
985 | .owner = THIS_MODULE, |
986 | .llseek = no_llseek, |
987 | .read = capi_read, |
988 | .write = capi_write, |
989 | .poll = capi_poll, |
990 | .unlocked_ioctl = capi_unlocked_ioctl, |
991 | .open = capi_open, |
992 | .release = capi_release, |
993 | }; |
994 | |
995 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
996 | /* -------- tty_operations for capincci ----------------------------- */ |
997 | |
998 | static int |
999 | capinc_tty_install(struct tty_driver *driver, struct tty_struct *tty) |
1000 | { |
1001 | struct capiminor *mp = capiminor_get(tty->index); |
1002 | int ret = tty_standard_install(driver, tty); |
1003 | |
1004 | if (ret == 0) |
1005 | tty->driver_data = mp; |
1006 | else |
1007 | capiminor_put(mp); |
1008 | return ret; |
1009 | } |
1010 | |
1011 | static void capinc_tty_cleanup(struct tty_struct *tty) |
1012 | { |
1013 | struct capiminor *mp = tty->driver_data; |
1014 | tty->driver_data = NULL; |
1015 | capiminor_put(mp); |
1016 | } |
1017 | |
1018 | static int capinc_tty_open(struct tty_struct *tty, struct file *filp) |
1019 | { |
1020 | struct capiminor *mp = tty->driver_data; |
1021 | int err; |
1022 | |
1023 | err = tty_port_open(&mp->port, tty, filp); |
1024 | if (err) |
1025 | return err; |
1026 | |
1027 | handle_minor_recv(mp); |
1028 | return 0; |
1029 | } |
1030 | |
1031 | static void capinc_tty_close(struct tty_struct *tty, struct file *filp) |
1032 | { |
1033 | struct capiminor *mp = tty->driver_data; |
1034 | |
1035 | tty_port_close(&mp->port, tty, filp); |
1036 | } |
1037 | |
1038 | static int capinc_tty_write(struct tty_struct *tty, |
1039 | const unsigned char *buf, int count) |
1040 | { |
1041 | struct capiminor *mp = tty->driver_data; |
1042 | struct sk_buff *skb; |
1043 | |
1044 | pr_debug("capinc_tty_write(count=%d)\n" , count); |
1045 | |
1046 | spin_lock_bh(&mp->outlock); |
1047 | skb = mp->outskb; |
1048 | if (skb) { |
1049 | mp->outskb = NULL; |
1050 | __skb_queue_tail(&mp->outqueue, skb); |
1051 | mp->outbytes += skb->len; |
1052 | } |
1053 | |
1054 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN + count, GFP_ATOMIC); |
1055 | if (!skb) { |
1056 | printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n" ); |
1057 | spin_unlock_bh(&mp->outlock); |
1058 | return -ENOMEM; |
1059 | } |
1060 | |
1061 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); |
1062 | skb_put_data(skb, buf, count); |
1063 | |
1064 | __skb_queue_tail(&mp->outqueue, skb); |
1065 | mp->outbytes += skb->len; |
1066 | spin_unlock_bh(&mp->outlock); |
1067 | |
1068 | handle_minor_send(mp); |
1069 | |
1070 | return count; |
1071 | } |
1072 | |
1073 | static int capinc_tty_put_char(struct tty_struct *tty, unsigned char ch) |
1074 | { |
1075 | struct capiminor *mp = tty->driver_data; |
1076 | bool invoke_send = false; |
1077 | struct sk_buff *skb; |
1078 | int ret = 1; |
1079 | |
1080 | pr_debug("capinc_put_char(%u)\n" , ch); |
1081 | |
1082 | spin_lock_bh(&mp->outlock); |
1083 | skb = mp->outskb; |
1084 | if (skb) { |
1085 | if (skb_tailroom(skb) > 0) { |
1086 | skb_put_u8(skb, ch); |
1087 | goto unlock_out; |
1088 | } |
1089 | mp->outskb = NULL; |
1090 | __skb_queue_tail(&mp->outqueue, skb); |
1091 | mp->outbytes += skb->len; |
1092 | invoke_send = true; |
1093 | } |
1094 | |
1095 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN + CAPI_MAX_BLKSIZE, GFP_ATOMIC); |
1096 | if (skb) { |
1097 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); |
1098 | skb_put_u8(skb, ch); |
1099 | mp->outskb = skb; |
1100 | } else { |
1101 | printk(KERN_ERR "capinc_put_char: char %u lost\n" , ch); |
1102 | ret = 0; |
1103 | } |
1104 | |
1105 | unlock_out: |
1106 | spin_unlock_bh(&mp->outlock); |
1107 | |
1108 | if (invoke_send) |
1109 | handle_minor_send(mp); |
1110 | |
1111 | return ret; |
1112 | } |
1113 | |
1114 | static void capinc_tty_flush_chars(struct tty_struct *tty) |
1115 | { |
1116 | struct capiminor *mp = tty->driver_data; |
1117 | struct sk_buff *skb; |
1118 | |
1119 | pr_debug("capinc_tty_flush_chars\n" ); |
1120 | |
1121 | spin_lock_bh(&mp->outlock); |
1122 | skb = mp->outskb; |
1123 | if (skb) { |
1124 | mp->outskb = NULL; |
1125 | __skb_queue_tail(&mp->outqueue, skb); |
1126 | mp->outbytes += skb->len; |
1127 | spin_unlock_bh(&mp->outlock); |
1128 | |
1129 | handle_minor_send(mp); |
1130 | } else |
1131 | spin_unlock_bh(&mp->outlock); |
1132 | |
1133 | handle_minor_recv(mp); |
1134 | } |
1135 | |
1136 | static int capinc_tty_write_room(struct tty_struct *tty) |
1137 | { |
1138 | struct capiminor *mp = tty->driver_data; |
1139 | int room; |
1140 | |
1141 | room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue); |
1142 | room *= CAPI_MAX_BLKSIZE; |
1143 | pr_debug("capinc_tty_write_room = %d\n" , room); |
1144 | return room; |
1145 | } |
1146 | |
1147 | static int capinc_tty_chars_in_buffer(struct tty_struct *tty) |
1148 | { |
1149 | struct capiminor *mp = tty->driver_data; |
1150 | |
1151 | pr_debug("capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n" , |
1152 | mp->outbytes, mp->nack, |
1153 | skb_queue_len(&mp->outqueue), |
1154 | skb_queue_len(&mp->inqueue)); |
1155 | return mp->outbytes; |
1156 | } |
1157 | |
1158 | static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios *old) |
1159 | { |
1160 | pr_debug("capinc_tty_set_termios\n" ); |
1161 | } |
1162 | |
1163 | static void capinc_tty_throttle(struct tty_struct *tty) |
1164 | { |
1165 | struct capiminor *mp = tty->driver_data; |
1166 | pr_debug("capinc_tty_throttle\n" ); |
1167 | mp->ttyinstop = 1; |
1168 | } |
1169 | |
1170 | static void capinc_tty_unthrottle(struct tty_struct *tty) |
1171 | { |
1172 | struct capiminor *mp = tty->driver_data; |
1173 | |
1174 | pr_debug("capinc_tty_unthrottle\n" ); |
1175 | mp->ttyinstop = 0; |
1176 | handle_minor_recv(mp); |
1177 | } |
1178 | |
1179 | static void capinc_tty_stop(struct tty_struct *tty) |
1180 | { |
1181 | struct capiminor *mp = tty->driver_data; |
1182 | |
1183 | pr_debug("capinc_tty_stop\n" ); |
1184 | mp->ttyoutstop = 1; |
1185 | } |
1186 | |
1187 | static void capinc_tty_start(struct tty_struct *tty) |
1188 | { |
1189 | struct capiminor *mp = tty->driver_data; |
1190 | |
1191 | pr_debug("capinc_tty_start\n" ); |
1192 | mp->ttyoutstop = 0; |
1193 | handle_minor_send(mp); |
1194 | } |
1195 | |
1196 | static void capinc_tty_hangup(struct tty_struct *tty) |
1197 | { |
1198 | struct capiminor *mp = tty->driver_data; |
1199 | |
1200 | pr_debug("capinc_tty_hangup\n" ); |
1201 | tty_port_hangup(&mp->port); |
1202 | } |
1203 | |
1204 | static int capinc_tty_break_ctl(struct tty_struct *tty, int state) |
1205 | { |
1206 | pr_debug("capinc_tty_break_ctl(%d)\n" , state); |
1207 | return 0; |
1208 | } |
1209 | |
1210 | static void capinc_tty_flush_buffer(struct tty_struct *tty) |
1211 | { |
1212 | pr_debug("capinc_tty_flush_buffer\n" ); |
1213 | } |
1214 | |
1215 | static void capinc_tty_set_ldisc(struct tty_struct *tty) |
1216 | { |
1217 | pr_debug("capinc_tty_set_ldisc\n" ); |
1218 | } |
1219 | |
1220 | static void capinc_tty_send_xchar(struct tty_struct *tty, char ch) |
1221 | { |
1222 | pr_debug("capinc_tty_send_xchar(%d)\n" , ch); |
1223 | } |
1224 | |
1225 | static const struct tty_operations capinc_ops = { |
1226 | .open = capinc_tty_open, |
1227 | .close = capinc_tty_close, |
1228 | .write = capinc_tty_write, |
1229 | .put_char = capinc_tty_put_char, |
1230 | .flush_chars = capinc_tty_flush_chars, |
1231 | .write_room = capinc_tty_write_room, |
1232 | .chars_in_buffer = capinc_tty_chars_in_buffer, |
1233 | .set_termios = capinc_tty_set_termios, |
1234 | .throttle = capinc_tty_throttle, |
1235 | .unthrottle = capinc_tty_unthrottle, |
1236 | .stop = capinc_tty_stop, |
1237 | .start = capinc_tty_start, |
1238 | .hangup = capinc_tty_hangup, |
1239 | .break_ctl = capinc_tty_break_ctl, |
1240 | .flush_buffer = capinc_tty_flush_buffer, |
1241 | .set_ldisc = capinc_tty_set_ldisc, |
1242 | .send_xchar = capinc_tty_send_xchar, |
1243 | .install = capinc_tty_install, |
1244 | .cleanup = capinc_tty_cleanup, |
1245 | }; |
1246 | |
1247 | static int __init capinc_tty_init(void) |
1248 | { |
1249 | struct tty_driver *drv; |
1250 | int err; |
1251 | |
1252 | if (capi_ttyminors > CAPINC_MAX_PORTS) |
1253 | capi_ttyminors = CAPINC_MAX_PORTS; |
1254 | if (capi_ttyminors <= 0) |
1255 | capi_ttyminors = CAPINC_NR_PORTS; |
1256 | |
1257 | capiminors = kcalloc(capi_ttyminors, sizeof(struct capiminor *), |
1258 | GFP_KERNEL); |
1259 | if (!capiminors) |
1260 | return -ENOMEM; |
1261 | |
1262 | drv = alloc_tty_driver(capi_ttyminors); |
1263 | if (!drv) { |
1264 | kfree(capiminors); |
1265 | return -ENOMEM; |
1266 | } |
1267 | drv->driver_name = "capi_nc" ; |
1268 | drv->name = "capi!" ; |
1269 | drv->major = 0; |
1270 | drv->minor_start = 0; |
1271 | drv->type = TTY_DRIVER_TYPE_SERIAL; |
1272 | drv->subtype = SERIAL_TYPE_NORMAL; |
1273 | drv->init_termios = tty_std_termios; |
1274 | drv->init_termios.c_iflag = ICRNL; |
1275 | drv->init_termios.c_oflag = OPOST | ONLCR; |
1276 | drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
1277 | drv->init_termios.c_lflag = 0; |
1278 | drv->flags = |
1279 | TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS | |
1280 | TTY_DRIVER_DYNAMIC_DEV; |
1281 | tty_set_operations(drv, &capinc_ops); |
1282 | |
1283 | err = tty_register_driver(drv); |
1284 | if (err) { |
1285 | put_tty_driver(drv); |
1286 | kfree(capiminors); |
1287 | printk(KERN_ERR "Couldn't register capi_nc driver\n" ); |
1288 | return err; |
1289 | } |
1290 | capinc_tty_driver = drv; |
1291 | return 0; |
1292 | } |
1293 | |
1294 | static void __exit capinc_tty_exit(void) |
1295 | { |
1296 | tty_unregister_driver(capinc_tty_driver); |
1297 | put_tty_driver(capinc_tty_driver); |
1298 | kfree(capiminors); |
1299 | } |
1300 | |
1301 | #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
1302 | |
1303 | static inline int capinc_tty_init(void) |
1304 | { |
1305 | return 0; |
1306 | } |
1307 | |
1308 | static inline void capinc_tty_exit(void) { } |
1309 | |
1310 | #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
1311 | |
1312 | /* -------- /proc functions ----------------------------------------- */ |
1313 | |
1314 | /* |
1315 | * /proc/capi/capi20: |
1316 | * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt |
1317 | */ |
1318 | static int __maybe_unused capi20_proc_show(struct seq_file *m, void *v) |
1319 | { |
1320 | struct capidev *cdev; |
1321 | struct list_head *l; |
1322 | |
1323 | mutex_lock(&capidev_list_lock); |
1324 | list_for_each(l, &capidev_list) { |
1325 | cdev = list_entry(l, struct capidev, list); |
1326 | seq_printf(m, "0 %d %lu %lu %lu %lu\n" , |
1327 | cdev->ap.applid, |
1328 | cdev->ap.nrecvctlpkt, |
1329 | cdev->ap.nrecvdatapkt, |
1330 | cdev->ap.nsentctlpkt, |
1331 | cdev->ap.nsentdatapkt); |
1332 | } |
1333 | mutex_unlock(&capidev_list_lock); |
1334 | return 0; |
1335 | } |
1336 | |
1337 | /* |
1338 | * /proc/capi/capi20ncci: |
1339 | * applid ncci |
1340 | */ |
1341 | static int __maybe_unused capi20ncci_proc_show(struct seq_file *m, void *v) |
1342 | { |
1343 | struct capidev *cdev; |
1344 | struct capincci *np; |
1345 | |
1346 | mutex_lock(&capidev_list_lock); |
1347 | list_for_each_entry(cdev, &capidev_list, list) { |
1348 | mutex_lock(&cdev->lock); |
1349 | list_for_each_entry(np, &cdev->nccis, list) |
1350 | seq_printf(m, "%d 0x%x\n" , cdev->ap.applid, np->ncci); |
1351 | mutex_unlock(&cdev->lock); |
1352 | } |
1353 | mutex_unlock(&capidev_list_lock); |
1354 | return 0; |
1355 | } |
1356 | |
1357 | static void __init proc_init(void) |
1358 | { |
1359 | proc_create_single("capi/capi20" , 0, NULL, capi20_proc_show); |
1360 | proc_create_single("capi/capi20ncci" , 0, NULL, capi20ncci_proc_show); |
1361 | } |
1362 | |
1363 | static void __exit proc_exit(void) |
1364 | { |
1365 | remove_proc_entry("capi/capi20" , NULL); |
1366 | remove_proc_entry("capi/capi20ncci" , NULL); |
1367 | } |
1368 | |
1369 | /* -------- init function and module interface ---------------------- */ |
1370 | |
1371 | |
1372 | static int __init capi_init(void) |
1373 | { |
1374 | const char *compileinfo; |
1375 | int major_ret; |
1376 | |
1377 | major_ret = register_chrdev(capi_major, "capi20" , &capi_fops); |
1378 | if (major_ret < 0) { |
1379 | printk(KERN_ERR "capi20: unable to get major %d\n" , capi_major); |
1380 | return major_ret; |
1381 | } |
1382 | capi_class = class_create(THIS_MODULE, "capi" ); |
1383 | if (IS_ERR(capi_class)) { |
1384 | unregister_chrdev(capi_major, "capi20" ); |
1385 | return PTR_ERR(capi_class); |
1386 | } |
1387 | |
1388 | device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi20" ); |
1389 | |
1390 | if (capinc_tty_init() < 0) { |
1391 | device_destroy(capi_class, MKDEV(capi_major, 0)); |
1392 | class_destroy(capi_class); |
1393 | unregister_chrdev(capi_major, "capi20" ); |
1394 | return -ENOMEM; |
1395 | } |
1396 | |
1397 | proc_init(); |
1398 | |
1399 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
1400 | compileinfo = " (middleware)" ; |
1401 | #else |
1402 | compileinfo = " (no middleware)" ; |
1403 | #endif |
1404 | printk(KERN_NOTICE "CAPI 2.0 started up with major %d%s\n" , |
1405 | capi_major, compileinfo); |
1406 | |
1407 | return 0; |
1408 | } |
1409 | |
1410 | static void __exit capi_exit(void) |
1411 | { |
1412 | proc_exit(); |
1413 | |
1414 | device_destroy(capi_class, MKDEV(capi_major, 0)); |
1415 | class_destroy(capi_class); |
1416 | unregister_chrdev(capi_major, "capi20" ); |
1417 | |
1418 | capinc_tty_exit(); |
1419 | } |
1420 | |
1421 | module_init(capi_init); |
1422 | module_exit(capi_exit); |
1423 | |