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/ethtool.h> |
15 | #include <linux/errno.h> |
16 | #include <linux/kernel.h> |
17 | #include <linux/major.h> |
18 | #include <linux/sched.h> |
19 | #include <linux/slab.h> |
20 | #include <linux/fcntl.h> |
21 | #include <linux/fs.h> |
22 | #include <linux/signal.h> |
23 | #include <linux/mutex.h> |
24 | #include <linux/mm.h> |
25 | #include <linux/timer.h> |
26 | #include <linux/wait.h> |
27 | #include <linux/tty.h> |
28 | #include <linux/netdevice.h> |
29 | #include <linux/ppp_defs.h> |
30 | #include <linux/ppp-ioctl.h> |
31 | #include <linux/skbuff.h> |
32 | #include <linux/proc_fs.h> |
33 | #include <linux/seq_file.h> |
34 | #include <linux/poll.h> |
35 | #include <linux/capi.h> |
36 | #include <linux/kernelcapi.h> |
37 | #include <linux/init.h> |
38 | #include <linux/device.h> |
39 | #include <linux/moduleparam.h> |
40 | #include <linux/isdn/capiutil.h> |
41 | #include <linux/isdn/capicmd.h> |
42 | |
43 | #include "kcapi.h" |
44 | |
45 | MODULE_DESCRIPTION("CAPI4Linux: kernel CAPI layer and /dev/capi20 interface" ); |
46 | MODULE_AUTHOR("Carsten Paeth" ); |
47 | MODULE_LICENSE("GPL" ); |
48 | |
49 | /* -------- driver information -------------------------------------- */ |
50 | |
51 | static DEFINE_MUTEX(capi_mutex); |
52 | static const struct class capi_class = { |
53 | .name = "capi" , |
54 | }; |
55 | static int capi_major = 68; /* allocated */ |
56 | |
57 | module_param_named(major, capi_major, uint, 0); |
58 | |
59 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
60 | #define CAPINC_NR_PORTS 32 |
61 | #define CAPINC_MAX_PORTS 256 |
62 | |
63 | static int capi_ttyminors = CAPINC_NR_PORTS; |
64 | |
65 | module_param_named(ttyminors, capi_ttyminors, uint, 0); |
66 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
67 | |
68 | /* -------- defines ------------------------------------------------- */ |
69 | |
70 | #define CAPINC_MAX_RECVQUEUE 10 |
71 | #define CAPINC_MAX_SENDQUEUE 10 |
72 | #define CAPI_MAX_BLKSIZE 2048 |
73 | |
74 | /* -------- data structures ----------------------------------------- */ |
75 | |
76 | struct capidev; |
77 | struct capincci; |
78 | struct capiminor; |
79 | |
80 | struct ackqueue_entry { |
81 | struct list_head list; |
82 | u16 datahandle; |
83 | }; |
84 | |
85 | struct capiminor { |
86 | unsigned int minor; |
87 | |
88 | struct capi20_appl *ap; |
89 | u32 ncci; |
90 | atomic_t datahandle; |
91 | atomic_t msgid; |
92 | |
93 | struct tty_port port; |
94 | int ttyinstop; |
95 | int ttyoutstop; |
96 | |
97 | struct sk_buff_head inqueue; |
98 | |
99 | struct sk_buff_head outqueue; |
100 | int outbytes; |
101 | struct sk_buff *outskb; |
102 | spinlock_t outlock; |
103 | |
104 | /* transmit path */ |
105 | struct list_head ackqueue; |
106 | int nack; |
107 | spinlock_t ackqlock; |
108 | }; |
109 | |
110 | struct capincci { |
111 | struct list_head list; |
112 | u32 ncci; |
113 | struct capidev *cdev; |
114 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
115 | struct capiminor *minorp; |
116 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
117 | }; |
118 | |
119 | struct capidev { |
120 | struct list_head list; |
121 | struct capi20_appl ap; |
122 | u16 errcode; |
123 | unsigned userflags; |
124 | |
125 | struct sk_buff_head recvqueue; |
126 | wait_queue_head_t recvwait; |
127 | |
128 | struct list_head nccis; |
129 | |
130 | struct mutex lock; |
131 | }; |
132 | |
133 | /* -------- global variables ---------------------------------------- */ |
134 | |
135 | static DEFINE_MUTEX(capidev_list_lock); |
136 | static LIST_HEAD(capidev_list); |
137 | |
138 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
139 | |
140 | static DEFINE_SPINLOCK(capiminors_lock); |
141 | static struct capiminor **capiminors; |
142 | |
143 | static struct tty_driver *capinc_tty_driver; |
144 | |
145 | /* -------- datahandles --------------------------------------------- */ |
146 | |
147 | static int capiminor_add_ack(struct capiminor *mp, u16 datahandle) |
148 | { |
149 | struct ackqueue_entry *n; |
150 | |
151 | n = kmalloc(size: sizeof(*n), GFP_ATOMIC); |
152 | if (unlikely(!n)) { |
153 | printk(KERN_ERR "capi: alloc datahandle failed\n" ); |
154 | return -1; |
155 | } |
156 | n->datahandle = datahandle; |
157 | INIT_LIST_HEAD(list: &n->list); |
158 | spin_lock_bh(lock: &mp->ackqlock); |
159 | list_add_tail(new: &n->list, head: &mp->ackqueue); |
160 | mp->nack++; |
161 | spin_unlock_bh(lock: &mp->ackqlock); |
162 | return 0; |
163 | } |
164 | |
165 | static int capiminor_del_ack(struct capiminor *mp, u16 datahandle) |
166 | { |
167 | struct ackqueue_entry *p, *tmp; |
168 | |
169 | spin_lock_bh(lock: &mp->ackqlock); |
170 | list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { |
171 | if (p->datahandle == datahandle) { |
172 | list_del(entry: &p->list); |
173 | mp->nack--; |
174 | spin_unlock_bh(lock: &mp->ackqlock); |
175 | kfree(objp: p); |
176 | return 0; |
177 | } |
178 | } |
179 | spin_unlock_bh(lock: &mp->ackqlock); |
180 | return -1; |
181 | } |
182 | |
183 | static void capiminor_del_all_ack(struct capiminor *mp) |
184 | { |
185 | struct ackqueue_entry *p, *tmp; |
186 | |
187 | list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { |
188 | list_del(entry: &p->list); |
189 | kfree(objp: p); |
190 | mp->nack--; |
191 | } |
192 | } |
193 | |
194 | |
195 | /* -------- struct capiminor ---------------------------------------- */ |
196 | |
197 | static void capiminor_destroy(struct tty_port *port) |
198 | { |
199 | struct capiminor *mp = container_of(port, struct capiminor, port); |
200 | |
201 | kfree_skb(skb: mp->outskb); |
202 | skb_queue_purge(list: &mp->inqueue); |
203 | skb_queue_purge(list: &mp->outqueue); |
204 | capiminor_del_all_ack(mp); |
205 | kfree(objp: mp); |
206 | } |
207 | |
208 | static const struct tty_port_operations capiminor_port_ops = { |
209 | .destruct = capiminor_destroy, |
210 | }; |
211 | |
212 | static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci) |
213 | { |
214 | struct capiminor *mp; |
215 | struct device *dev; |
216 | unsigned int minor; |
217 | |
218 | mp = kzalloc(size: sizeof(*mp), GFP_KERNEL); |
219 | if (!mp) { |
220 | printk(KERN_ERR "capi: can't alloc capiminor\n" ); |
221 | return NULL; |
222 | } |
223 | |
224 | mp->ap = ap; |
225 | mp->ncci = ncci; |
226 | INIT_LIST_HEAD(list: &mp->ackqueue); |
227 | spin_lock_init(&mp->ackqlock); |
228 | |
229 | skb_queue_head_init(list: &mp->inqueue); |
230 | skb_queue_head_init(list: &mp->outqueue); |
231 | spin_lock_init(&mp->outlock); |
232 | |
233 | tty_port_init(port: &mp->port); |
234 | mp->port.ops = &capiminor_port_ops; |
235 | |
236 | /* Allocate the least unused minor number. */ |
237 | spin_lock(lock: &capiminors_lock); |
238 | for (minor = 0; minor < capi_ttyminors; minor++) |
239 | if (!capiminors[minor]) { |
240 | capiminors[minor] = mp; |
241 | break; |
242 | } |
243 | spin_unlock(lock: &capiminors_lock); |
244 | |
245 | if (minor == capi_ttyminors) { |
246 | printk(KERN_NOTICE "capi: out of minors\n" ); |
247 | goto err_out1; |
248 | } |
249 | |
250 | mp->minor = minor; |
251 | |
252 | dev = tty_port_register_device(port: &mp->port, driver: capinc_tty_driver, index: minor, |
253 | NULL); |
254 | if (IS_ERR(ptr: dev)) |
255 | goto err_out2; |
256 | |
257 | return mp; |
258 | |
259 | err_out2: |
260 | spin_lock(lock: &capiminors_lock); |
261 | capiminors[minor] = NULL; |
262 | spin_unlock(lock: &capiminors_lock); |
263 | |
264 | err_out1: |
265 | tty_port_put(port: &mp->port); |
266 | return NULL; |
267 | } |
268 | |
269 | static struct capiminor *capiminor_get(unsigned int minor) |
270 | { |
271 | struct capiminor *mp; |
272 | |
273 | spin_lock(lock: &capiminors_lock); |
274 | mp = capiminors[minor]; |
275 | if (mp) |
276 | tty_port_get(port: &mp->port); |
277 | spin_unlock(lock: &capiminors_lock); |
278 | |
279 | return mp; |
280 | } |
281 | |
282 | static inline void capiminor_put(struct capiminor *mp) |
283 | { |
284 | tty_port_put(port: &mp->port); |
285 | } |
286 | |
287 | static void capiminor_free(struct capiminor *mp) |
288 | { |
289 | tty_unregister_device(driver: capinc_tty_driver, index: mp->minor); |
290 | |
291 | spin_lock(lock: &capiminors_lock); |
292 | capiminors[mp->minor] = NULL; |
293 | spin_unlock(lock: &capiminors_lock); |
294 | |
295 | capiminor_put(mp); |
296 | } |
297 | |
298 | /* -------- struct capincci ----------------------------------------- */ |
299 | |
300 | static void capincci_alloc_minor(struct capidev *cdev, struct capincci *np) |
301 | { |
302 | if (cdev->userflags & CAPIFLAG_HIGHJACKING) |
303 | np->minorp = capiminor_alloc(ap: &cdev->ap, ncci: np->ncci); |
304 | } |
305 | |
306 | static void capincci_free_minor(struct capincci *np) |
307 | { |
308 | struct capiminor *mp = np->minorp; |
309 | struct tty_struct *tty; |
310 | |
311 | if (mp) { |
312 | tty = tty_port_tty_get(port: &mp->port); |
313 | if (tty) { |
314 | tty_vhangup(tty); |
315 | tty_kref_put(tty); |
316 | } |
317 | |
318 | capiminor_free(mp); |
319 | } |
320 | } |
321 | |
322 | static inline unsigned int capincci_minor_opencount(struct capincci *np) |
323 | { |
324 | struct capiminor *mp = np->minorp; |
325 | unsigned int count = 0; |
326 | struct tty_struct *tty; |
327 | |
328 | if (mp) { |
329 | tty = tty_port_tty_get(port: &mp->port); |
330 | if (tty) { |
331 | count = tty->count; |
332 | tty_kref_put(tty); |
333 | } |
334 | } |
335 | return count; |
336 | } |
337 | |
338 | #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
339 | |
340 | static inline void |
341 | capincci_alloc_minor(struct capidev *cdev, struct capincci *np) { } |
342 | static inline void capincci_free_minor(struct capincci *np) { } |
343 | |
344 | #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
345 | |
346 | static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci) |
347 | { |
348 | struct capincci *np; |
349 | |
350 | np = kzalloc(size: sizeof(*np), GFP_KERNEL); |
351 | if (!np) |
352 | return NULL; |
353 | np->ncci = ncci; |
354 | np->cdev = cdev; |
355 | |
356 | capincci_alloc_minor(cdev, np); |
357 | |
358 | list_add_tail(new: &np->list, head: &cdev->nccis); |
359 | |
360 | return np; |
361 | } |
362 | |
363 | static void capincci_free(struct capidev *cdev, u32 ncci) |
364 | { |
365 | struct capincci *np, *tmp; |
366 | |
367 | list_for_each_entry_safe(np, tmp, &cdev->nccis, list) |
368 | if (ncci == 0xffffffff || np->ncci == ncci) { |
369 | capincci_free_minor(np); |
370 | list_del(entry: &np->list); |
371 | kfree(objp: np); |
372 | } |
373 | } |
374 | |
375 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
376 | static struct capincci *capincci_find(struct capidev *cdev, u32 ncci) |
377 | { |
378 | struct capincci *np; |
379 | |
380 | list_for_each_entry(np, &cdev->nccis, list) |
381 | if (np->ncci == ncci) |
382 | return np; |
383 | return NULL; |
384 | } |
385 | |
386 | /* -------- handle data queue --------------------------------------- */ |
387 | |
388 | static struct sk_buff * |
389 | gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb) |
390 | { |
391 | struct sk_buff *nskb; |
392 | nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_KERNEL); |
393 | if (nskb) { |
394 | u16 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 4 + 2); |
395 | unsigned char *s = skb_put(skb: nskb, CAPI_DATA_B3_RESP_LEN); |
396 | capimsg_setu16(m: s, off: 0, CAPI_DATA_B3_RESP_LEN); |
397 | capimsg_setu16(m: s, off: 2, val: mp->ap->applid); |
398 | capimsg_setu8 (m: s, off: 4, CAPI_DATA_B3); |
399 | capimsg_setu8 (m: s, off: 5, CAPI_RESP); |
400 | capimsg_setu16(m: s, off: 6, val: atomic_inc_return(v: &mp->msgid)); |
401 | capimsg_setu32(m: s, off: 8, val: mp->ncci); |
402 | capimsg_setu16(m: s, off: 12, val: datahandle); |
403 | } |
404 | return nskb; |
405 | } |
406 | |
407 | static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb) |
408 | { |
409 | unsigned int datalen = skb->len - CAPIMSG_LEN(skb->data); |
410 | struct tty_struct *tty; |
411 | struct sk_buff *nskb; |
412 | u16 errcode, datahandle; |
413 | struct tty_ldisc *ld; |
414 | int ret = -1; |
415 | |
416 | tty = tty_port_tty_get(port: &mp->port); |
417 | if (!tty) { |
418 | pr_debug("capi: currently no receiver\n" ); |
419 | return -1; |
420 | } |
421 | |
422 | ld = tty_ldisc_ref(tty); |
423 | if (!ld) { |
424 | /* fatal error, do not requeue */ |
425 | ret = 0; |
426 | kfree_skb(skb); |
427 | goto deref_tty; |
428 | } |
429 | |
430 | if (ld->ops->receive_buf == NULL) { |
431 | pr_debug("capi: ldisc has no receive_buf function\n" ); |
432 | /* fatal error, do not requeue */ |
433 | goto free_skb; |
434 | } |
435 | if (mp->ttyinstop) { |
436 | pr_debug("capi: recv tty throttled\n" ); |
437 | goto deref_ldisc; |
438 | } |
439 | |
440 | if (tty->receive_room < datalen) { |
441 | pr_debug("capi: no room in tty\n" ); |
442 | goto deref_ldisc; |
443 | } |
444 | |
445 | nskb = gen_data_b3_resp_for(mp, skb); |
446 | if (!nskb) { |
447 | printk(KERN_ERR "capi: gen_data_b3_resp failed\n" ); |
448 | goto deref_ldisc; |
449 | } |
450 | |
451 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4); |
452 | |
453 | errcode = capi20_put_message(ap: mp->ap, skb: nskb); |
454 | |
455 | if (errcode == CAPI_NOERROR) { |
456 | skb_pull(skb, CAPIMSG_LEN(skb->data)); |
457 | pr_debug("capi: DATA_B3_RESP %u len=%d => ldisc\n" , |
458 | datahandle, skb->len); |
459 | ld->ops->receive_buf(tty, skb->data, NULL, skb->len); |
460 | } else { |
461 | printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n" , |
462 | errcode); |
463 | kfree_skb(skb: nskb); |
464 | |
465 | if (errcode == CAPI_SENDQUEUEFULL) |
466 | goto deref_ldisc; |
467 | } |
468 | |
469 | free_skb: |
470 | ret = 0; |
471 | kfree_skb(skb); |
472 | |
473 | deref_ldisc: |
474 | tty_ldisc_deref(ld); |
475 | |
476 | deref_tty: |
477 | tty_kref_put(tty); |
478 | return ret; |
479 | } |
480 | |
481 | static void handle_minor_recv(struct capiminor *mp) |
482 | { |
483 | struct sk_buff *skb; |
484 | |
485 | while ((skb = skb_dequeue(list: &mp->inqueue)) != NULL) |
486 | if (handle_recv_skb(mp, skb) < 0) { |
487 | skb_queue_head(list: &mp->inqueue, newsk: skb); |
488 | return; |
489 | } |
490 | } |
491 | |
492 | static void handle_minor_send(struct capiminor *mp) |
493 | { |
494 | struct tty_struct *tty; |
495 | struct sk_buff *skb; |
496 | u16 len; |
497 | u16 errcode; |
498 | u16 datahandle; |
499 | |
500 | tty = tty_port_tty_get(port: &mp->port); |
501 | if (!tty) |
502 | return; |
503 | |
504 | if (mp->ttyoutstop) { |
505 | pr_debug("capi: send: tty stopped\n" ); |
506 | tty_kref_put(tty); |
507 | return; |
508 | } |
509 | |
510 | while (1) { |
511 | spin_lock_bh(lock: &mp->outlock); |
512 | skb = __skb_dequeue(list: &mp->outqueue); |
513 | if (!skb) { |
514 | spin_unlock_bh(lock: &mp->outlock); |
515 | break; |
516 | } |
517 | len = (u16)skb->len; |
518 | mp->outbytes -= len; |
519 | spin_unlock_bh(lock: &mp->outlock); |
520 | |
521 | datahandle = atomic_inc_return(v: &mp->datahandle); |
522 | skb_push(skb, CAPI_DATA_B3_REQ_LEN); |
523 | memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN); |
524 | capimsg_setu16(m: skb->data, off: 0, CAPI_DATA_B3_REQ_LEN); |
525 | capimsg_setu16(m: skb->data, off: 2, val: mp->ap->applid); |
526 | capimsg_setu8 (m: skb->data, off: 4, CAPI_DATA_B3); |
527 | capimsg_setu8 (m: skb->data, off: 5, CAPI_REQ); |
528 | capimsg_setu16(m: skb->data, off: 6, val: atomic_inc_return(v: &mp->msgid)); |
529 | capimsg_setu32(m: skb->data, off: 8, val: mp->ncci); /* NCCI */ |
530 | capimsg_setu32(m: skb->data, off: 12, val: (u32)(long)skb->data);/* Data32 */ |
531 | capimsg_setu16(m: skb->data, off: 16, val: len); /* Data length */ |
532 | capimsg_setu16(m: skb->data, off: 18, val: datahandle); |
533 | capimsg_setu16(m: skb->data, off: 20, val: 0); /* Flags */ |
534 | |
535 | if (capiminor_add_ack(mp, datahandle) < 0) { |
536 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); |
537 | |
538 | spin_lock_bh(lock: &mp->outlock); |
539 | __skb_queue_head(list: &mp->outqueue, newsk: skb); |
540 | mp->outbytes += len; |
541 | spin_unlock_bh(lock: &mp->outlock); |
542 | |
543 | break; |
544 | } |
545 | errcode = capi20_put_message(ap: mp->ap, skb); |
546 | if (errcode == CAPI_NOERROR) { |
547 | pr_debug("capi: DATA_B3_REQ %u len=%u\n" , |
548 | datahandle, len); |
549 | continue; |
550 | } |
551 | capiminor_del_ack(mp, datahandle); |
552 | |
553 | if (errcode == CAPI_SENDQUEUEFULL) { |
554 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); |
555 | |
556 | spin_lock_bh(lock: &mp->outlock); |
557 | __skb_queue_head(list: &mp->outqueue, newsk: skb); |
558 | mp->outbytes += len; |
559 | spin_unlock_bh(lock: &mp->outlock); |
560 | |
561 | break; |
562 | } |
563 | |
564 | /* ups, drop packet */ |
565 | printk(KERN_ERR "capi: put_message = %x\n" , errcode); |
566 | kfree_skb(skb); |
567 | } |
568 | tty_kref_put(tty); |
569 | } |
570 | |
571 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
572 | /* -------- function called by lower level -------------------------- */ |
573 | |
574 | static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb) |
575 | { |
576 | struct capidev *cdev = ap->private; |
577 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
578 | struct capiminor *mp; |
579 | u16 datahandle; |
580 | struct capincci *np; |
581 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
582 | |
583 | mutex_lock(&cdev->lock); |
584 | |
585 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) { |
586 | u16 info = CAPIMSG_U16(skb->data, 12); // Info field |
587 | if ((info & 0xff00) == 0) |
588 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); |
589 | } |
590 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) |
591 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); |
592 | |
593 | if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) { |
594 | skb_queue_tail(list: &cdev->recvqueue, newsk: skb); |
595 | wake_up_interruptible(&cdev->recvwait); |
596 | goto unlock_out; |
597 | } |
598 | |
599 | #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE |
600 | skb_queue_tail(&cdev->recvqueue, skb); |
601 | wake_up_interruptible(&cdev->recvwait); |
602 | |
603 | #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
604 | |
605 | np = capincci_find(cdev, CAPIMSG_CONTROL(skb->data)); |
606 | if (!np) { |
607 | printk(KERN_ERR "BUG: capi_signal: ncci not found\n" ); |
608 | skb_queue_tail(list: &cdev->recvqueue, newsk: skb); |
609 | wake_up_interruptible(&cdev->recvwait); |
610 | goto unlock_out; |
611 | } |
612 | |
613 | mp = np->minorp; |
614 | if (!mp) { |
615 | skb_queue_tail(list: &cdev->recvqueue, newsk: skb); |
616 | wake_up_interruptible(&cdev->recvwait); |
617 | goto unlock_out; |
618 | } |
619 | if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) { |
620 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 4 + 2); |
621 | pr_debug("capi_signal: DATA_B3_IND %u len=%d\n" , |
622 | datahandle, skb->len-CAPIMSG_LEN(skb->data)); |
623 | skb_queue_tail(list: &mp->inqueue, newsk: skb); |
624 | |
625 | handle_minor_recv(mp); |
626 | |
627 | } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) { |
628 | |
629 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4); |
630 | pr_debug("capi_signal: DATA_B3_CONF %u 0x%x\n" , |
631 | datahandle, |
632 | CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 2)); |
633 | kfree_skb(skb); |
634 | capiminor_del_ack(mp, datahandle); |
635 | tty_port_tty_wakeup(port: &mp->port); |
636 | handle_minor_send(mp); |
637 | |
638 | } else { |
639 | /* ups, let capi application handle it :-) */ |
640 | skb_queue_tail(list: &cdev->recvqueue, newsk: skb); |
641 | wake_up_interruptible(&cdev->recvwait); |
642 | } |
643 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
644 | |
645 | unlock_out: |
646 | mutex_unlock(lock: &cdev->lock); |
647 | } |
648 | |
649 | /* -------- file_operations for capidev ----------------------------- */ |
650 | |
651 | static ssize_t |
652 | capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) |
653 | { |
654 | struct capidev *cdev = file->private_data; |
655 | struct sk_buff *skb; |
656 | size_t copied; |
657 | int err; |
658 | |
659 | if (!cdev->ap.applid) |
660 | return -ENODEV; |
661 | |
662 | skb = skb_dequeue(list: &cdev->recvqueue); |
663 | if (!skb) { |
664 | if (file->f_flags & O_NONBLOCK) |
665 | return -EAGAIN; |
666 | err = wait_event_interruptible(cdev->recvwait, |
667 | (skb = skb_dequeue(&cdev->recvqueue))); |
668 | if (err) |
669 | return err; |
670 | } |
671 | if (skb->len > count) { |
672 | skb_queue_head(list: &cdev->recvqueue, newsk: skb); |
673 | return -EMSGSIZE; |
674 | } |
675 | if (copy_to_user(to: buf, from: skb->data, n: skb->len)) { |
676 | skb_queue_head(list: &cdev->recvqueue, newsk: skb); |
677 | return -EFAULT; |
678 | } |
679 | copied = skb->len; |
680 | |
681 | kfree_skb(skb); |
682 | |
683 | return copied; |
684 | } |
685 | |
686 | static ssize_t |
687 | capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) |
688 | { |
689 | struct capidev *cdev = file->private_data; |
690 | struct sk_buff *skb; |
691 | u16 mlen; |
692 | |
693 | if (!cdev->ap.applid) |
694 | return -ENODEV; |
695 | |
696 | if (count < CAPIMSG_BASELEN) |
697 | return -EINVAL; |
698 | |
699 | skb = alloc_skb(size: count, GFP_USER); |
700 | if (!skb) |
701 | return -ENOMEM; |
702 | |
703 | if (copy_from_user(to: skb_put(skb, len: count), from: buf, n: count)) { |
704 | kfree_skb(skb); |
705 | return -EFAULT; |
706 | } |
707 | mlen = CAPIMSG_LEN(skb->data); |
708 | if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) { |
709 | if (count < CAPI_DATA_B3_REQ_LEN || |
710 | (size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) { |
711 | kfree_skb(skb); |
712 | return -EINVAL; |
713 | } |
714 | } else { |
715 | if (mlen != count) { |
716 | kfree_skb(skb); |
717 | return -EINVAL; |
718 | } |
719 | } |
720 | CAPIMSG_SETAPPID(skb->data, cdev->ap.applid); |
721 | |
722 | if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) { |
723 | if (count < CAPI_DISCONNECT_B3_RESP_LEN) { |
724 | kfree_skb(skb); |
725 | return -EINVAL; |
726 | } |
727 | mutex_lock(&cdev->lock); |
728 | capincci_free(cdev, CAPIMSG_NCCI(skb->data)); |
729 | mutex_unlock(lock: &cdev->lock); |
730 | } |
731 | |
732 | cdev->errcode = capi20_put_message(ap: &cdev->ap, skb); |
733 | |
734 | if (cdev->errcode) { |
735 | kfree_skb(skb); |
736 | return -EIO; |
737 | } |
738 | return count; |
739 | } |
740 | |
741 | static __poll_t |
742 | capi_poll(struct file *file, poll_table *wait) |
743 | { |
744 | struct capidev *cdev = file->private_data; |
745 | __poll_t mask = 0; |
746 | |
747 | if (!cdev->ap.applid) |
748 | return EPOLLERR; |
749 | |
750 | poll_wait(filp: file, wait_address: &(cdev->recvwait), p: wait); |
751 | mask = EPOLLOUT | EPOLLWRNORM; |
752 | if (!skb_queue_empty_lockless(list: &cdev->recvqueue)) |
753 | mask |= EPOLLIN | EPOLLRDNORM; |
754 | return mask; |
755 | } |
756 | |
757 | static int |
758 | capi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
759 | { |
760 | struct capidev *cdev = file->private_data; |
761 | capi_ioctl_struct data; |
762 | int retval = -EINVAL; |
763 | void __user *argp = (void __user *)arg; |
764 | |
765 | switch (cmd) { |
766 | case CAPI_REGISTER: |
767 | mutex_lock(&cdev->lock); |
768 | |
769 | if (cdev->ap.applid) { |
770 | retval = -EEXIST; |
771 | goto register_out; |
772 | } |
773 | if (copy_from_user(to: &cdev->ap.rparam, from: argp, |
774 | n: sizeof(struct capi_register_params))) { |
775 | retval = -EFAULT; |
776 | goto register_out; |
777 | } |
778 | cdev->ap.private = cdev; |
779 | cdev->ap.recv_message = capi_recv_message; |
780 | cdev->errcode = capi20_register(ap: &cdev->ap); |
781 | retval = (int)cdev->ap.applid; |
782 | if (cdev->errcode) { |
783 | cdev->ap.applid = 0; |
784 | retval = -EIO; |
785 | } |
786 | |
787 | register_out: |
788 | mutex_unlock(lock: &cdev->lock); |
789 | return retval; |
790 | |
791 | case CAPI_GET_VERSION: |
792 | if (copy_from_user(to: &data.contr, from: argp, |
793 | n: sizeof(data.contr))) |
794 | return -EFAULT; |
795 | cdev->errcode = capi20_get_version(contr: data.contr, verp: &data.version); |
796 | if (cdev->errcode) |
797 | return -EIO; |
798 | if (copy_to_user(to: argp, from: &data.version, |
799 | n: sizeof(data.version))) |
800 | return -EFAULT; |
801 | return 0; |
802 | |
803 | case CAPI_GET_SERIAL: |
804 | if (copy_from_user(to: &data.contr, from: argp, |
805 | n: sizeof(data.contr))) |
806 | return -EFAULT; |
807 | cdev->errcode = capi20_get_serial(contr: data.contr, serial: data.serial); |
808 | if (cdev->errcode) |
809 | return -EIO; |
810 | if (copy_to_user(to: argp, from: data.serial, |
811 | n: sizeof(data.serial))) |
812 | return -EFAULT; |
813 | return 0; |
814 | |
815 | case CAPI_GET_PROFILE: |
816 | if (copy_from_user(to: &data.contr, from: argp, |
817 | n: sizeof(data.contr))) |
818 | return -EFAULT; |
819 | |
820 | if (data.contr == 0) { |
821 | cdev->errcode = capi20_get_profile(contr: data.contr, profp: &data.profile); |
822 | if (cdev->errcode) |
823 | return -EIO; |
824 | |
825 | retval = copy_to_user(to: argp, |
826 | from: &data.profile.ncontroller, |
827 | n: sizeof(data.profile.ncontroller)); |
828 | |
829 | } else { |
830 | cdev->errcode = capi20_get_profile(contr: data.contr, profp: &data.profile); |
831 | if (cdev->errcode) |
832 | return -EIO; |
833 | |
834 | retval = copy_to_user(to: argp, from: &data.profile, |
835 | n: sizeof(data.profile)); |
836 | } |
837 | if (retval) |
838 | return -EFAULT; |
839 | return 0; |
840 | |
841 | case CAPI_GET_MANUFACTURER: |
842 | if (copy_from_user(to: &data.contr, from: argp, |
843 | n: sizeof(data.contr))) |
844 | return -EFAULT; |
845 | cdev->errcode = capi20_get_manufacturer(contr: data.contr, buf: data.manufacturer); |
846 | if (cdev->errcode) |
847 | return -EIO; |
848 | |
849 | if (copy_to_user(to: argp, from: data.manufacturer, |
850 | n: sizeof(data.manufacturer))) |
851 | return -EFAULT; |
852 | |
853 | return 0; |
854 | |
855 | case CAPI_GET_ERRCODE: |
856 | data.errcode = cdev->errcode; |
857 | cdev->errcode = CAPI_NOERROR; |
858 | if (arg) { |
859 | if (copy_to_user(to: argp, from: &data.errcode, |
860 | n: sizeof(data.errcode))) |
861 | return -EFAULT; |
862 | } |
863 | return data.errcode; |
864 | |
865 | case CAPI_INSTALLED: |
866 | if (capi20_isinstalled() == CAPI_NOERROR) |
867 | return 0; |
868 | return -ENXIO; |
869 | |
870 | case CAPI_MANUFACTURER_CMD: { |
871 | struct capi_manufacturer_cmd mcmd; |
872 | if (!capable(CAP_SYS_ADMIN)) |
873 | return -EPERM; |
874 | if (copy_from_user(to: &mcmd, from: argp, n: sizeof(mcmd))) |
875 | return -EFAULT; |
876 | return capi20_manufacturer(cmd: mcmd.cmd, data: mcmd.data); |
877 | } |
878 | case CAPI_SET_FLAGS: |
879 | case CAPI_CLR_FLAGS: { |
880 | unsigned userflags; |
881 | |
882 | if (copy_from_user(to: &userflags, from: argp, n: sizeof(userflags))) |
883 | return -EFAULT; |
884 | |
885 | mutex_lock(&cdev->lock); |
886 | if (cmd == CAPI_SET_FLAGS) |
887 | cdev->userflags |= userflags; |
888 | else |
889 | cdev->userflags &= ~userflags; |
890 | mutex_unlock(lock: &cdev->lock); |
891 | return 0; |
892 | } |
893 | case CAPI_GET_FLAGS: |
894 | if (copy_to_user(to: argp, from: &cdev->userflags, |
895 | n: sizeof(cdev->userflags))) |
896 | return -EFAULT; |
897 | return 0; |
898 | |
899 | #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE |
900 | case CAPI_NCCI_OPENCOUNT: |
901 | return 0; |
902 | |
903 | #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
904 | case CAPI_NCCI_OPENCOUNT: { |
905 | struct capincci *nccip; |
906 | unsigned ncci; |
907 | int count = 0; |
908 | |
909 | if (copy_from_user(to: &ncci, from: argp, n: sizeof(ncci))) |
910 | return -EFAULT; |
911 | |
912 | mutex_lock(&cdev->lock); |
913 | nccip = capincci_find(cdev, ncci: (u32)ncci); |
914 | if (nccip) |
915 | count = capincci_minor_opencount(np: nccip); |
916 | mutex_unlock(lock: &cdev->lock); |
917 | return count; |
918 | } |
919 | |
920 | case CAPI_NCCI_GETUNIT: { |
921 | struct capincci *nccip; |
922 | struct capiminor *mp; |
923 | unsigned ncci; |
924 | int unit = -ESRCH; |
925 | |
926 | if (copy_from_user(to: &ncci, from: argp, n: sizeof(ncci))) |
927 | return -EFAULT; |
928 | |
929 | mutex_lock(&cdev->lock); |
930 | nccip = capincci_find(cdev, ncci: (u32)ncci); |
931 | if (nccip) { |
932 | mp = nccip->minorp; |
933 | if (mp) |
934 | unit = mp->minor; |
935 | } |
936 | mutex_unlock(lock: &cdev->lock); |
937 | return unit; |
938 | } |
939 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
940 | |
941 | default: |
942 | return -EINVAL; |
943 | } |
944 | } |
945 | |
946 | static long |
947 | capi_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
948 | { |
949 | int ret; |
950 | |
951 | mutex_lock(&capi_mutex); |
952 | ret = capi_ioctl(file, cmd, arg); |
953 | mutex_unlock(lock: &capi_mutex); |
954 | |
955 | return ret; |
956 | } |
957 | |
958 | #ifdef CONFIG_COMPAT |
959 | static long |
960 | capi_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
961 | { |
962 | int ret; |
963 | |
964 | if (cmd == CAPI_MANUFACTURER_CMD) { |
965 | struct { |
966 | compat_ulong_t cmd; |
967 | compat_uptr_t data; |
968 | } mcmd32; |
969 | |
970 | if (!capable(CAP_SYS_ADMIN)) |
971 | return -EPERM; |
972 | if (copy_from_user(to: &mcmd32, from: compat_ptr(uptr: arg), n: sizeof(mcmd32))) |
973 | return -EFAULT; |
974 | |
975 | mutex_lock(&capi_mutex); |
976 | ret = capi20_manufacturer(cmd: mcmd32.cmd, data: compat_ptr(uptr: mcmd32.data)); |
977 | mutex_unlock(lock: &capi_mutex); |
978 | |
979 | return ret; |
980 | } |
981 | |
982 | return capi_unlocked_ioctl(file, cmd, arg: (unsigned long)compat_ptr(uptr: arg)); |
983 | } |
984 | #endif |
985 | |
986 | static int capi_open(struct inode *inode, struct file *file) |
987 | { |
988 | struct capidev *cdev; |
989 | |
990 | cdev = kzalloc(size: sizeof(*cdev), GFP_KERNEL); |
991 | if (!cdev) |
992 | return -ENOMEM; |
993 | |
994 | mutex_init(&cdev->lock); |
995 | skb_queue_head_init(list: &cdev->recvqueue); |
996 | init_waitqueue_head(&cdev->recvwait); |
997 | INIT_LIST_HEAD(list: &cdev->nccis); |
998 | file->private_data = cdev; |
999 | |
1000 | mutex_lock(&capidev_list_lock); |
1001 | list_add_tail(new: &cdev->list, head: &capidev_list); |
1002 | mutex_unlock(lock: &capidev_list_lock); |
1003 | |
1004 | return stream_open(inode, filp: file); |
1005 | } |
1006 | |
1007 | static int capi_release(struct inode *inode, struct file *file) |
1008 | { |
1009 | struct capidev *cdev = file->private_data; |
1010 | |
1011 | mutex_lock(&capidev_list_lock); |
1012 | list_del(entry: &cdev->list); |
1013 | mutex_unlock(lock: &capidev_list_lock); |
1014 | |
1015 | if (cdev->ap.applid) |
1016 | capi20_release(ap: &cdev->ap); |
1017 | skb_queue_purge(list: &cdev->recvqueue); |
1018 | capincci_free(cdev, ncci: 0xffffffff); |
1019 | |
1020 | kfree(objp: cdev); |
1021 | return 0; |
1022 | } |
1023 | |
1024 | static const struct file_operations capi_fops = |
1025 | { |
1026 | .owner = THIS_MODULE, |
1027 | .llseek = no_llseek, |
1028 | .read = capi_read, |
1029 | .write = capi_write, |
1030 | .poll = capi_poll, |
1031 | .unlocked_ioctl = capi_unlocked_ioctl, |
1032 | #ifdef CONFIG_COMPAT |
1033 | .compat_ioctl = capi_compat_ioctl, |
1034 | #endif |
1035 | .open = capi_open, |
1036 | .release = capi_release, |
1037 | }; |
1038 | |
1039 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
1040 | /* -------- tty_operations for capincci ----------------------------- */ |
1041 | |
1042 | static int |
1043 | capinc_tty_install(struct tty_driver *driver, struct tty_struct *tty) |
1044 | { |
1045 | struct capiminor *mp = capiminor_get(minor: tty->index); |
1046 | int ret = tty_standard_install(driver, tty); |
1047 | |
1048 | if (ret == 0) |
1049 | tty->driver_data = mp; |
1050 | else |
1051 | capiminor_put(mp); |
1052 | return ret; |
1053 | } |
1054 | |
1055 | static void capinc_tty_cleanup(struct tty_struct *tty) |
1056 | { |
1057 | struct capiminor *mp = tty->driver_data; |
1058 | tty->driver_data = NULL; |
1059 | capiminor_put(mp); |
1060 | } |
1061 | |
1062 | static int capinc_tty_open(struct tty_struct *tty, struct file *filp) |
1063 | { |
1064 | struct capiminor *mp = tty->driver_data; |
1065 | int err; |
1066 | |
1067 | err = tty_port_open(port: &mp->port, tty, filp); |
1068 | if (err) |
1069 | return err; |
1070 | |
1071 | handle_minor_recv(mp); |
1072 | return 0; |
1073 | } |
1074 | |
1075 | static void capinc_tty_close(struct tty_struct *tty, struct file *filp) |
1076 | { |
1077 | struct capiminor *mp = tty->driver_data; |
1078 | |
1079 | tty_port_close(port: &mp->port, tty, filp); |
1080 | } |
1081 | |
1082 | static ssize_t capinc_tty_write(struct tty_struct *tty, const u8 *buf, |
1083 | size_t count) |
1084 | { |
1085 | struct capiminor *mp = tty->driver_data; |
1086 | struct sk_buff *skb; |
1087 | |
1088 | pr_debug("capinc_tty_write(count=%zu)\n" , count); |
1089 | |
1090 | spin_lock_bh(lock: &mp->outlock); |
1091 | skb = mp->outskb; |
1092 | if (skb) { |
1093 | mp->outskb = NULL; |
1094 | __skb_queue_tail(list: &mp->outqueue, newsk: skb); |
1095 | mp->outbytes += skb->len; |
1096 | } |
1097 | |
1098 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN + count, GFP_ATOMIC); |
1099 | if (!skb) { |
1100 | printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n" ); |
1101 | spin_unlock_bh(lock: &mp->outlock); |
1102 | return -ENOMEM; |
1103 | } |
1104 | |
1105 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); |
1106 | skb_put_data(skb, data: buf, len: count); |
1107 | |
1108 | __skb_queue_tail(list: &mp->outqueue, newsk: skb); |
1109 | mp->outbytes += skb->len; |
1110 | spin_unlock_bh(lock: &mp->outlock); |
1111 | |
1112 | handle_minor_send(mp); |
1113 | |
1114 | return count; |
1115 | } |
1116 | |
1117 | static int capinc_tty_put_char(struct tty_struct *tty, u8 ch) |
1118 | { |
1119 | struct capiminor *mp = tty->driver_data; |
1120 | bool invoke_send = false; |
1121 | struct sk_buff *skb; |
1122 | int ret = 1; |
1123 | |
1124 | pr_debug("capinc_put_char(%u)\n" , ch); |
1125 | |
1126 | spin_lock_bh(lock: &mp->outlock); |
1127 | skb = mp->outskb; |
1128 | if (skb) { |
1129 | if (skb_tailroom(skb) > 0) { |
1130 | skb_put_u8(skb, val: ch); |
1131 | goto unlock_out; |
1132 | } |
1133 | mp->outskb = NULL; |
1134 | __skb_queue_tail(list: &mp->outqueue, newsk: skb); |
1135 | mp->outbytes += skb->len; |
1136 | invoke_send = true; |
1137 | } |
1138 | |
1139 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN + CAPI_MAX_BLKSIZE, GFP_ATOMIC); |
1140 | if (skb) { |
1141 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); |
1142 | skb_put_u8(skb, val: ch); |
1143 | mp->outskb = skb; |
1144 | } else { |
1145 | printk(KERN_ERR "capinc_put_char: char %u lost\n" , ch); |
1146 | ret = 0; |
1147 | } |
1148 | |
1149 | unlock_out: |
1150 | spin_unlock_bh(lock: &mp->outlock); |
1151 | |
1152 | if (invoke_send) |
1153 | handle_minor_send(mp); |
1154 | |
1155 | return ret; |
1156 | } |
1157 | |
1158 | static void capinc_tty_flush_chars(struct tty_struct *tty) |
1159 | { |
1160 | struct capiminor *mp = tty->driver_data; |
1161 | struct sk_buff *skb; |
1162 | |
1163 | spin_lock_bh(lock: &mp->outlock); |
1164 | skb = mp->outskb; |
1165 | if (skb) { |
1166 | mp->outskb = NULL; |
1167 | __skb_queue_tail(list: &mp->outqueue, newsk: skb); |
1168 | mp->outbytes += skb->len; |
1169 | spin_unlock_bh(lock: &mp->outlock); |
1170 | |
1171 | handle_minor_send(mp); |
1172 | } else |
1173 | spin_unlock_bh(lock: &mp->outlock); |
1174 | |
1175 | handle_minor_recv(mp); |
1176 | } |
1177 | |
1178 | static unsigned int capinc_tty_write_room(struct tty_struct *tty) |
1179 | { |
1180 | struct capiminor *mp = tty->driver_data; |
1181 | unsigned int room; |
1182 | |
1183 | room = CAPINC_MAX_SENDQUEUE-skb_queue_len(list_: &mp->outqueue); |
1184 | room *= CAPI_MAX_BLKSIZE; |
1185 | pr_debug("capinc_tty_write_room = %u\n" , room); |
1186 | return room; |
1187 | } |
1188 | |
1189 | static unsigned int capinc_tty_chars_in_buffer(struct tty_struct *tty) |
1190 | { |
1191 | struct capiminor *mp = tty->driver_data; |
1192 | |
1193 | pr_debug("capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n" , |
1194 | mp->outbytes, mp->nack, |
1195 | skb_queue_len(&mp->outqueue), |
1196 | skb_queue_len(&mp->inqueue)); |
1197 | return mp->outbytes; |
1198 | } |
1199 | |
1200 | static void capinc_tty_throttle(struct tty_struct *tty) |
1201 | { |
1202 | struct capiminor *mp = tty->driver_data; |
1203 | mp->ttyinstop = 1; |
1204 | } |
1205 | |
1206 | static void capinc_tty_unthrottle(struct tty_struct *tty) |
1207 | { |
1208 | struct capiminor *mp = tty->driver_data; |
1209 | |
1210 | mp->ttyinstop = 0; |
1211 | handle_minor_recv(mp); |
1212 | } |
1213 | |
1214 | static void capinc_tty_stop(struct tty_struct *tty) |
1215 | { |
1216 | struct capiminor *mp = tty->driver_data; |
1217 | |
1218 | mp->ttyoutstop = 1; |
1219 | } |
1220 | |
1221 | static void capinc_tty_start(struct tty_struct *tty) |
1222 | { |
1223 | struct capiminor *mp = tty->driver_data; |
1224 | |
1225 | mp->ttyoutstop = 0; |
1226 | handle_minor_send(mp); |
1227 | } |
1228 | |
1229 | static void capinc_tty_hangup(struct tty_struct *tty) |
1230 | { |
1231 | struct capiminor *mp = tty->driver_data; |
1232 | |
1233 | tty_port_hangup(port: &mp->port); |
1234 | } |
1235 | |
1236 | static void capinc_tty_send_xchar(struct tty_struct *tty, u8 ch) |
1237 | { |
1238 | pr_debug("capinc_tty_send_xchar(%u)\n" , ch); |
1239 | } |
1240 | |
1241 | static const struct tty_operations capinc_ops = { |
1242 | .open = capinc_tty_open, |
1243 | .close = capinc_tty_close, |
1244 | .write = capinc_tty_write, |
1245 | .put_char = capinc_tty_put_char, |
1246 | .flush_chars = capinc_tty_flush_chars, |
1247 | .write_room = capinc_tty_write_room, |
1248 | .chars_in_buffer = capinc_tty_chars_in_buffer, |
1249 | .throttle = capinc_tty_throttle, |
1250 | .unthrottle = capinc_tty_unthrottle, |
1251 | .stop = capinc_tty_stop, |
1252 | .start = capinc_tty_start, |
1253 | .hangup = capinc_tty_hangup, |
1254 | .send_xchar = capinc_tty_send_xchar, |
1255 | .install = capinc_tty_install, |
1256 | .cleanup = capinc_tty_cleanup, |
1257 | }; |
1258 | |
1259 | static int __init capinc_tty_init(void) |
1260 | { |
1261 | struct tty_driver *drv; |
1262 | int err; |
1263 | |
1264 | if (capi_ttyminors > CAPINC_MAX_PORTS) |
1265 | capi_ttyminors = CAPINC_MAX_PORTS; |
1266 | if (capi_ttyminors <= 0) |
1267 | capi_ttyminors = CAPINC_NR_PORTS; |
1268 | |
1269 | capiminors = kcalloc(n: capi_ttyminors, size: sizeof(struct capiminor *), |
1270 | GFP_KERNEL); |
1271 | if (!capiminors) |
1272 | return -ENOMEM; |
1273 | |
1274 | drv = tty_alloc_driver(capi_ttyminors, TTY_DRIVER_REAL_RAW | |
1275 | TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_DYNAMIC_DEV); |
1276 | if (IS_ERR(ptr: drv)) { |
1277 | kfree(objp: capiminors); |
1278 | return PTR_ERR(ptr: drv); |
1279 | } |
1280 | drv->driver_name = "capi_nc" ; |
1281 | drv->name = "capi!" ; |
1282 | drv->major = 0; |
1283 | drv->minor_start = 0; |
1284 | drv->type = TTY_DRIVER_TYPE_SERIAL; |
1285 | drv->subtype = SERIAL_TYPE_NORMAL; |
1286 | drv->init_termios = tty_std_termios; |
1287 | drv->init_termios.c_iflag = ICRNL; |
1288 | drv->init_termios.c_oflag = OPOST | ONLCR; |
1289 | drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
1290 | drv->init_termios.c_lflag = 0; |
1291 | tty_set_operations(driver: drv, op: &capinc_ops); |
1292 | |
1293 | err = tty_register_driver(driver: drv); |
1294 | if (err) { |
1295 | tty_driver_kref_put(driver: drv); |
1296 | kfree(objp: capiminors); |
1297 | printk(KERN_ERR "Couldn't register capi_nc driver\n" ); |
1298 | return err; |
1299 | } |
1300 | capinc_tty_driver = drv; |
1301 | return 0; |
1302 | } |
1303 | |
1304 | static void __exit capinc_tty_exit(void) |
1305 | { |
1306 | tty_unregister_driver(driver: capinc_tty_driver); |
1307 | tty_driver_kref_put(driver: capinc_tty_driver); |
1308 | kfree(objp: capiminors); |
1309 | } |
1310 | |
1311 | #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
1312 | |
1313 | static inline int capinc_tty_init(void) |
1314 | { |
1315 | return 0; |
1316 | } |
1317 | |
1318 | static inline void capinc_tty_exit(void) { } |
1319 | |
1320 | #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
1321 | |
1322 | /* -------- /proc functions ----------------------------------------- */ |
1323 | |
1324 | /* |
1325 | * /proc/capi/capi20: |
1326 | * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt |
1327 | */ |
1328 | static int __maybe_unused capi20_proc_show(struct seq_file *m, void *v) |
1329 | { |
1330 | struct capidev *cdev; |
1331 | struct list_head *l; |
1332 | |
1333 | mutex_lock(&capidev_list_lock); |
1334 | list_for_each(l, &capidev_list) { |
1335 | cdev = list_entry(l, struct capidev, list); |
1336 | seq_printf(m, fmt: "0 %d %lu %lu %lu %lu\n" , |
1337 | cdev->ap.applid, |
1338 | cdev->ap.nrecvctlpkt, |
1339 | cdev->ap.nrecvdatapkt, |
1340 | cdev->ap.nsentctlpkt, |
1341 | cdev->ap.nsentdatapkt); |
1342 | } |
1343 | mutex_unlock(lock: &capidev_list_lock); |
1344 | return 0; |
1345 | } |
1346 | |
1347 | /* |
1348 | * /proc/capi/capi20ncci: |
1349 | * applid ncci |
1350 | */ |
1351 | static int __maybe_unused capi20ncci_proc_show(struct seq_file *m, void *v) |
1352 | { |
1353 | struct capidev *cdev; |
1354 | struct capincci *np; |
1355 | |
1356 | mutex_lock(&capidev_list_lock); |
1357 | list_for_each_entry(cdev, &capidev_list, list) { |
1358 | mutex_lock(&cdev->lock); |
1359 | list_for_each_entry(np, &cdev->nccis, list) |
1360 | seq_printf(m, fmt: "%d 0x%x\n" , cdev->ap.applid, np->ncci); |
1361 | mutex_unlock(lock: &cdev->lock); |
1362 | } |
1363 | mutex_unlock(lock: &capidev_list_lock); |
1364 | return 0; |
1365 | } |
1366 | |
1367 | static void __init proc_init(void) |
1368 | { |
1369 | proc_create_single("capi/capi20" , 0, NULL, capi20_proc_show); |
1370 | proc_create_single("capi/capi20ncci" , 0, NULL, capi20ncci_proc_show); |
1371 | } |
1372 | |
1373 | static void __exit proc_exit(void) |
1374 | { |
1375 | remove_proc_entry("capi/capi20" , NULL); |
1376 | remove_proc_entry("capi/capi20ncci" , NULL); |
1377 | } |
1378 | |
1379 | /* -------- init function and module interface ---------------------- */ |
1380 | |
1381 | |
1382 | static int __init capi_init(void) |
1383 | { |
1384 | const char *compileinfo; |
1385 | int major_ret; |
1386 | int ret; |
1387 | |
1388 | ret = kcapi_init(); |
1389 | if (ret) |
1390 | return ret; |
1391 | |
1392 | major_ret = register_chrdev(major: capi_major, name: "capi20" , fops: &capi_fops); |
1393 | if (major_ret < 0) { |
1394 | printk(KERN_ERR "capi20: unable to get major %d\n" , capi_major); |
1395 | kcapi_exit(); |
1396 | return major_ret; |
1397 | } |
1398 | |
1399 | ret = class_register(class: &capi_class); |
1400 | if (ret) { |
1401 | unregister_chrdev(major: capi_major, name: "capi20" ); |
1402 | kcapi_exit(); |
1403 | return ret; |
1404 | } |
1405 | |
1406 | device_create(cls: &capi_class, NULL, MKDEV(capi_major, 0), NULL, fmt: "capi20" ); |
1407 | |
1408 | if (capinc_tty_init() < 0) { |
1409 | device_destroy(cls: &capi_class, MKDEV(capi_major, 0)); |
1410 | class_unregister(class: &capi_class); |
1411 | unregister_chrdev(major: capi_major, name: "capi20" ); |
1412 | kcapi_exit(); |
1413 | return -ENOMEM; |
1414 | } |
1415 | |
1416 | proc_init(); |
1417 | |
1418 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
1419 | compileinfo = " (middleware)" ; |
1420 | #else |
1421 | compileinfo = " (no middleware)" ; |
1422 | #endif |
1423 | printk(KERN_NOTICE "CAPI 2.0 started up with major %d%s\n" , |
1424 | capi_major, compileinfo); |
1425 | |
1426 | return 0; |
1427 | } |
1428 | |
1429 | static void __exit capi_exit(void) |
1430 | { |
1431 | proc_exit(); |
1432 | |
1433 | device_destroy(cls: &capi_class, MKDEV(capi_major, 0)); |
1434 | class_unregister(class: &capi_class); |
1435 | unregister_chrdev(major: capi_major, name: "capi20" ); |
1436 | |
1437 | capinc_tty_exit(); |
1438 | |
1439 | kcapi_exit(); |
1440 | } |
1441 | |
1442 | module_init(capi_init); |
1443 | module_exit(capi_exit); |
1444 | |