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1da177e4 LT |
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 | ||
1da177e4 LT |
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/mm.h> | |
22 | #include <linux/smp_lock.h> | |
23 | #include <linux/timer.h> | |
24 | #include <linux/wait.h> | |
25 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
26 | #include <linux/tty.h> | |
27 | #ifdef CONFIG_PPP | |
28 | #include <linux/netdevice.h> | |
29 | #include <linux/ppp_defs.h> | |
30 | #include <linux/if_ppp.h> | |
31 | #endif /* CONFIG_PPP */ | |
32 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
33 | #include <linux/skbuff.h> | |
34 | #include <linux/proc_fs.h> | |
35 | #include <linux/poll.h> | |
36 | #include <linux/capi.h> | |
37 | #include <linux/kernelcapi.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/device.h> | |
40 | #include <linux/moduleparam.h> | |
1da177e4 LT |
41 | #include <linux/isdn/capiutil.h> |
42 | #include <linux/isdn/capicmd.h> | |
43 | #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE) | |
44 | #include "capifs.h" | |
45 | #endif | |
46 | ||
47 | static char *revision = "$Revision: 1.1.2.7 $"; | |
48 | ||
49 | MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface"); | |
50 | MODULE_AUTHOR("Carsten Paeth"); | |
51 | MODULE_LICENSE("GPL"); | |
52 | ||
53 | #undef _DEBUG_REFCOUNT /* alloc/free and open/close debug */ | |
54 | #undef _DEBUG_TTYFUNCS /* call to tty_driver */ | |
55 | #undef _DEBUG_DATAFLOW /* data flow */ | |
56 | ||
57 | /* -------- driver information -------------------------------------- */ | |
58 | ||
56b22935 | 59 | static struct class *capi_class; |
1da177e4 | 60 | |
408b664a | 61 | static int capi_major = 68; /* allocated */ |
1da177e4 LT |
62 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
63 | #define CAPINC_NR_PORTS 32 | |
64 | #define CAPINC_MAX_PORTS 256 | |
408b664a AB |
65 | static int capi_ttymajor = 191; |
66 | static int capi_ttyminors = CAPINC_NR_PORTS; | |
1da177e4 LT |
67 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
68 | ||
69 | module_param_named(major, capi_major, uint, 0); | |
70 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
71 | module_param_named(ttymajor, capi_ttymajor, uint, 0); | |
72 | module_param_named(ttyminors, capi_ttyminors, uint, 0); | |
73 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
74 | ||
75 | /* -------- defines ------------------------------------------------- */ | |
76 | ||
77 | #define CAPINC_MAX_RECVQUEUE 10 | |
78 | #define CAPINC_MAX_SENDQUEUE 10 | |
79 | #define CAPI_MAX_BLKSIZE 2048 | |
80 | ||
81 | /* -------- data structures ----------------------------------------- */ | |
82 | ||
83 | struct capidev; | |
84 | struct capincci; | |
85 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
86 | struct capiminor; | |
87 | ||
6aa65472 MB |
88 | struct datahandle_queue { |
89 | struct list_head list; | |
90 | u16 datahandle; | |
91 | }; | |
92 | ||
1da177e4 LT |
93 | struct capiminor { |
94 | struct list_head list; | |
95 | struct capincci *nccip; | |
96 | unsigned int minor; | |
97 | ||
98 | struct capi20_appl *ap; | |
99 | u32 ncci; | |
100 | u16 datahandle; | |
101 | u16 msgid; | |
102 | ||
103 | struct tty_struct *tty; | |
104 | int ttyinstop; | |
105 | int ttyoutstop; | |
106 | struct sk_buff *ttyskb; | |
107 | atomic_t ttyopencount; | |
108 | ||
109 | struct sk_buff_head inqueue; | |
110 | int inbytes; | |
111 | struct sk_buff_head outqueue; | |
112 | int outbytes; | |
113 | ||
114 | /* transmit path */ | |
6aa65472 | 115 | struct list_head ackqueue; |
1da177e4 | 116 | int nack; |
6aa65472 | 117 | spinlock_t ackqlock; |
1da177e4 LT |
118 | }; |
119 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
120 | ||
121 | struct capincci { | |
122 | struct capincci *next; | |
123 | u32 ncci; | |
124 | struct capidev *cdev; | |
125 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
126 | struct capiminor *minorp; | |
127 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
128 | }; | |
129 | ||
130 | struct capidev { | |
131 | struct list_head list; | |
132 | struct capi20_appl ap; | |
133 | u16 errcode; | |
134 | unsigned userflags; | |
135 | ||
136 | struct sk_buff_head recvqueue; | |
137 | wait_queue_head_t recvwait; | |
138 | ||
139 | struct capincci *nccis; | |
140 | ||
141 | struct semaphore ncci_list_sem; | |
142 | }; | |
143 | ||
144 | /* -------- global variables ---------------------------------------- */ | |
145 | ||
146 | static DEFINE_RWLOCK(capidev_list_lock); | |
147 | static LIST_HEAD(capidev_list); | |
148 | ||
149 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
150 | static DEFINE_RWLOCK(capiminor_list_lock); | |
151 | static LIST_HEAD(capiminor_list); | |
152 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
153 | ||
154 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
155 | /* -------- datahandles --------------------------------------------- */ | |
156 | ||
157 | static int capincci_add_ack(struct capiminor *mp, u16 datahandle) | |
158 | { | |
6aa65472 MB |
159 | struct datahandle_queue *n; |
160 | unsigned long flags; | |
1da177e4 LT |
161 | |
162 | n = kmalloc(sizeof(*n), GFP_ATOMIC); | |
6aa65472 MB |
163 | if (unlikely(!n)) { |
164 | printk(KERN_ERR "capi: alloc datahandle failed\n"); | |
165 | return -1; | |
1da177e4 | 166 | } |
1da177e4 | 167 | n->datahandle = datahandle; |
6aa65472 MB |
168 | INIT_LIST_HEAD(&n->list); |
169 | spin_lock_irqsave(&mp->ackqlock, flags); | |
170 | list_add_tail(&n->list, &mp->ackqueue); | |
1da177e4 | 171 | mp->nack++; |
6aa65472 | 172 | spin_unlock_irqrestore(&mp->ackqlock, flags); |
1da177e4 LT |
173 | return 0; |
174 | } | |
175 | ||
176 | static int capiminor_del_ack(struct capiminor *mp, u16 datahandle) | |
177 | { | |
6aa65472 MB |
178 | struct datahandle_queue *p, *tmp; |
179 | unsigned long flags; | |
1da177e4 | 180 | |
6aa65472 MB |
181 | spin_lock_irqsave(&mp->ackqlock, flags); |
182 | list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { | |
183 | if (p->datahandle == datahandle) { | |
184 | list_del(&p->list); | |
1da177e4 LT |
185 | kfree(p); |
186 | mp->nack--; | |
6aa65472 | 187 | spin_unlock_irqrestore(&mp->ackqlock, flags); |
1da177e4 LT |
188 | return 0; |
189 | } | |
190 | } | |
6aa65472 | 191 | spin_unlock_irqrestore(&mp->ackqlock, flags); |
1da177e4 LT |
192 | return -1; |
193 | } | |
194 | ||
195 | static void capiminor_del_all_ack(struct capiminor *mp) | |
196 | { | |
6aa65472 MB |
197 | struct datahandle_queue *p, *tmp; |
198 | unsigned long flags; | |
1da177e4 | 199 | |
6aa65472 MB |
200 | spin_lock_irqsave(&mp->ackqlock, flags); |
201 | list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { | |
202 | list_del(&p->list); | |
1da177e4 LT |
203 | kfree(p); |
204 | mp->nack--; | |
205 | } | |
6aa65472 | 206 | spin_unlock_irqrestore(&mp->ackqlock, flags); |
1da177e4 LT |
207 | } |
208 | ||
209 | ||
210 | /* -------- struct capiminor ---------------------------------------- */ | |
211 | ||
212 | static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci) | |
213 | { | |
214 | struct capiminor *mp, *p; | |
215 | unsigned int minor = 0; | |
216 | unsigned long flags; | |
217 | ||
218 | mp = kmalloc(sizeof(*mp), GFP_ATOMIC); | |
219 | if (!mp) { | |
220 | printk(KERN_ERR "capi: can't alloc capiminor\n"); | |
221 | return NULL; | |
222 | } | |
223 | ||
224 | memset(mp, 0, sizeof(struct capiminor)); | |
225 | mp->ap = ap; | |
226 | mp->ncci = ncci; | |
227 | mp->msgid = 0; | |
228 | atomic_set(&mp->ttyopencount,0); | |
6aa65472 MB |
229 | INIT_LIST_HEAD(&mp->ackqueue); |
230 | spin_lock_init(&mp->ackqlock); | |
1da177e4 LT |
231 | |
232 | skb_queue_head_init(&mp->inqueue); | |
233 | skb_queue_head_init(&mp->outqueue); | |
234 | ||
235 | /* Allocate the least unused minor number. | |
236 | */ | |
237 | write_lock_irqsave(&capiminor_list_lock, flags); | |
238 | if (list_empty(&capiminor_list)) | |
239 | list_add(&mp->list, &capiminor_list); | |
240 | else { | |
241 | list_for_each_entry(p, &capiminor_list, list) { | |
242 | if (p->minor > minor) | |
243 | break; | |
244 | minor++; | |
245 | } | |
246 | ||
247 | if (minor < capi_ttyminors) { | |
248 | mp->minor = minor; | |
249 | list_add(&mp->list, p->list.prev); | |
250 | } | |
251 | } | |
252 | write_unlock_irqrestore(&capiminor_list_lock, flags); | |
253 | ||
254 | if (!(minor < capi_ttyminors)) { | |
255 | printk(KERN_NOTICE "capi: out of minors\n"); | |
256 | kfree(mp); | |
257 | return NULL; | |
258 | } | |
259 | ||
260 | return mp; | |
261 | } | |
262 | ||
263 | static void capiminor_free(struct capiminor *mp) | |
264 | { | |
265 | unsigned long flags; | |
266 | ||
267 | write_lock_irqsave(&capiminor_list_lock, flags); | |
268 | list_del(&mp->list); | |
269 | write_unlock_irqrestore(&capiminor_list_lock, flags); | |
270 | ||
271 | if (mp->ttyskb) kfree_skb(mp->ttyskb); | |
272 | mp->ttyskb = NULL; | |
273 | skb_queue_purge(&mp->inqueue); | |
274 | skb_queue_purge(&mp->outqueue); | |
275 | capiminor_del_all_ack(mp); | |
276 | kfree(mp); | |
277 | } | |
278 | ||
408b664a | 279 | static struct capiminor *capiminor_find(unsigned int minor) |
1da177e4 LT |
280 | { |
281 | struct list_head *l; | |
282 | struct capiminor *p = NULL; | |
283 | ||
284 | read_lock(&capiminor_list_lock); | |
285 | list_for_each(l, &capiminor_list) { | |
286 | p = list_entry(l, struct capiminor, list); | |
287 | if (p->minor == minor) | |
288 | break; | |
289 | } | |
290 | read_unlock(&capiminor_list_lock); | |
291 | if (l == &capiminor_list) | |
292 | return NULL; | |
293 | ||
294 | return p; | |
295 | } | |
296 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
297 | ||
298 | /* -------- struct capincci ----------------------------------------- */ | |
299 | ||
300 | static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci) | |
301 | { | |
302 | struct capincci *np, **pp; | |
303 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
304 | struct capiminor *mp = NULL; | |
305 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
306 | ||
307 | np = kmalloc(sizeof(*np), GFP_ATOMIC); | |
308 | if (!np) | |
309 | return NULL; | |
310 | memset(np, 0, sizeof(struct capincci)); | |
311 | np->ncci = ncci; | |
312 | np->cdev = cdev; | |
313 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
314 | mp = NULL; | |
315 | if (cdev->userflags & CAPIFLAG_HIGHJACKING) | |
316 | mp = np->minorp = capiminor_alloc(&cdev->ap, ncci); | |
317 | if (mp) { | |
318 | mp->nccip = np; | |
319 | #ifdef _DEBUG_REFCOUNT | |
320 | printk(KERN_DEBUG "set mp->nccip\n"); | |
321 | #endif | |
322 | #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE) | |
323 | capifs_new_ncci(mp->minor, MKDEV(capi_ttymajor, mp->minor)); | |
324 | #endif | |
325 | } | |
326 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
327 | for (pp=&cdev->nccis; *pp; pp = &(*pp)->next) | |
328 | ; | |
329 | *pp = np; | |
330 | return np; | |
331 | } | |
332 | ||
333 | static void capincci_free(struct capidev *cdev, u32 ncci) | |
334 | { | |
335 | struct capincci *np, **pp; | |
336 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
337 | struct capiminor *mp; | |
338 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
339 | ||
340 | pp=&cdev->nccis; | |
341 | while (*pp) { | |
342 | np = *pp; | |
343 | if (ncci == 0xffffffff || np->ncci == ncci) { | |
344 | *pp = (*pp)->next; | |
345 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
346 | if ((mp = np->minorp) != 0) { | |
347 | #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE) | |
348 | capifs_free_ncci(mp->minor); | |
349 | #endif | |
350 | if (mp->tty) { | |
351 | mp->nccip = NULL; | |
352 | #ifdef _DEBUG_REFCOUNT | |
353 | printk(KERN_DEBUG "reset mp->nccip\n"); | |
354 | #endif | |
355 | tty_hangup(mp->tty); | |
356 | } else { | |
357 | capiminor_free(mp); | |
358 | } | |
359 | } | |
360 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
361 | kfree(np); | |
362 | if (*pp == 0) return; | |
363 | } else { | |
364 | pp = &(*pp)->next; | |
365 | } | |
366 | } | |
367 | } | |
368 | ||
369 | static struct capincci *capincci_find(struct capidev *cdev, u32 ncci) | |
370 | { | |
371 | struct capincci *p; | |
372 | ||
373 | for (p=cdev->nccis; p ; p = p->next) { | |
374 | if (p->ncci == ncci) | |
375 | break; | |
376 | } | |
377 | return p; | |
378 | } | |
379 | ||
380 | /* -------- struct capidev ------------------------------------------ */ | |
381 | ||
382 | static struct capidev *capidev_alloc(void) | |
383 | { | |
384 | struct capidev *cdev; | |
385 | unsigned long flags; | |
386 | ||
387 | cdev = kmalloc(sizeof(*cdev), GFP_KERNEL); | |
388 | if (!cdev) | |
389 | return NULL; | |
390 | memset(cdev, 0, sizeof(struct capidev)); | |
391 | ||
392 | init_MUTEX(&cdev->ncci_list_sem); | |
393 | skb_queue_head_init(&cdev->recvqueue); | |
394 | init_waitqueue_head(&cdev->recvwait); | |
395 | write_lock_irqsave(&capidev_list_lock, flags); | |
396 | list_add_tail(&cdev->list, &capidev_list); | |
397 | write_unlock_irqrestore(&capidev_list_lock, flags); | |
398 | return cdev; | |
399 | } | |
400 | ||
401 | static void capidev_free(struct capidev *cdev) | |
402 | { | |
403 | unsigned long flags; | |
404 | ||
405 | if (cdev->ap.applid) { | |
406 | capi20_release(&cdev->ap); | |
407 | cdev->ap.applid = 0; | |
408 | } | |
409 | skb_queue_purge(&cdev->recvqueue); | |
410 | ||
411 | down(&cdev->ncci_list_sem); | |
412 | capincci_free(cdev, 0xffffffff); | |
413 | up(&cdev->ncci_list_sem); | |
414 | ||
415 | write_lock_irqsave(&capidev_list_lock, flags); | |
416 | list_del(&cdev->list); | |
417 | write_unlock_irqrestore(&capidev_list_lock, flags); | |
418 | kfree(cdev); | |
419 | } | |
420 | ||
421 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
422 | /* -------- handle data queue --------------------------------------- */ | |
423 | ||
424 | static struct sk_buff * | |
425 | gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb) | |
426 | { | |
427 | struct sk_buff *nskb; | |
428 | nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_ATOMIC); | |
429 | if (nskb) { | |
430 | u16 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4+4+2); | |
431 | unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN); | |
432 | capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN); | |
433 | capimsg_setu16(s, 2, mp->ap->applid); | |
434 | capimsg_setu8 (s, 4, CAPI_DATA_B3); | |
435 | capimsg_setu8 (s, 5, CAPI_RESP); | |
436 | capimsg_setu16(s, 6, mp->msgid++); | |
437 | capimsg_setu32(s, 8, mp->ncci); | |
438 | capimsg_setu16(s, 12, datahandle); | |
439 | } | |
440 | return nskb; | |
441 | } | |
442 | ||
443 | static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb) | |
444 | { | |
445 | struct sk_buff *nskb; | |
446 | int datalen; | |
447 | u16 errcode, datahandle; | |
448 | struct tty_ldisc *ld; | |
449 | ||
450 | datalen = skb->len - CAPIMSG_LEN(skb->data); | |
451 | if (mp->tty == NULL) | |
452 | { | |
453 | #ifdef _DEBUG_DATAFLOW | |
454 | printk(KERN_DEBUG "capi: currently no receiver\n"); | |
455 | #endif | |
456 | return -1; | |
457 | } | |
458 | ||
459 | ld = tty_ldisc_ref(mp->tty); | |
460 | if (ld == NULL) | |
461 | return -1; | |
462 | if (ld->receive_buf == NULL) { | |
463 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) | |
464 | printk(KERN_DEBUG "capi: ldisc has no receive_buf function\n"); | |
465 | #endif | |
466 | goto bad; | |
467 | } | |
468 | if (mp->ttyinstop) { | |
469 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) | |
470 | printk(KERN_DEBUG "capi: recv tty throttled\n"); | |
471 | #endif | |
472 | goto bad; | |
473 | } | |
33f0f88f | 474 | if (mp->tty->receive_room < datalen) { |
1da177e4 LT |
475 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) |
476 | printk(KERN_DEBUG "capi: no room in tty\n"); | |
477 | #endif | |
478 | goto bad; | |
479 | } | |
480 | if ((nskb = gen_data_b3_resp_for(mp, skb)) == 0) { | |
481 | printk(KERN_ERR "capi: gen_data_b3_resp failed\n"); | |
482 | goto bad; | |
483 | } | |
484 | datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4); | |
485 | errcode = capi20_put_message(mp->ap, nskb); | |
486 | if (errcode != CAPI_NOERROR) { | |
487 | printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n", | |
488 | errcode); | |
489 | kfree_skb(nskb); | |
490 | goto bad; | |
491 | } | |
492 | (void)skb_pull(skb, CAPIMSG_LEN(skb->data)); | |
493 | #ifdef _DEBUG_DATAFLOW | |
494 | printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldisc\n", | |
495 | datahandle, skb->len); | |
496 | #endif | |
497 | ld->receive_buf(mp->tty, skb->data, NULL, skb->len); | |
498 | kfree_skb(skb); | |
499 | tty_ldisc_deref(ld); | |
500 | return 0; | |
501 | bad: | |
502 | tty_ldisc_deref(ld); | |
503 | return -1; | |
504 | } | |
505 | ||
506 | static void handle_minor_recv(struct capiminor *mp) | |
507 | { | |
508 | struct sk_buff *skb; | |
509 | while ((skb = skb_dequeue(&mp->inqueue)) != 0) { | |
510 | unsigned int len = skb->len; | |
511 | mp->inbytes -= len; | |
512 | if (handle_recv_skb(mp, skb) < 0) { | |
513 | skb_queue_head(&mp->inqueue, skb); | |
514 | mp->inbytes += len; | |
515 | return; | |
516 | } | |
517 | } | |
518 | } | |
519 | ||
520 | static int handle_minor_send(struct capiminor *mp) | |
521 | { | |
522 | struct sk_buff *skb; | |
523 | u16 len; | |
524 | int count = 0; | |
525 | u16 errcode; | |
526 | u16 datahandle; | |
527 | ||
528 | if (mp->tty && mp->ttyoutstop) { | |
529 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) | |
530 | printk(KERN_DEBUG "capi: send: tty stopped\n"); | |
531 | #endif | |
532 | return 0; | |
533 | } | |
534 | ||
535 | while ((skb = skb_dequeue(&mp->outqueue)) != 0) { | |
536 | datahandle = mp->datahandle; | |
537 | len = (u16)skb->len; | |
538 | skb_push(skb, CAPI_DATA_B3_REQ_LEN); | |
539 | memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN); | |
540 | capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN); | |
541 | capimsg_setu16(skb->data, 2, mp->ap->applid); | |
542 | capimsg_setu8 (skb->data, 4, CAPI_DATA_B3); | |
543 | capimsg_setu8 (skb->data, 5, CAPI_REQ); | |
544 | capimsg_setu16(skb->data, 6, mp->msgid++); | |
545 | capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */ | |
546 | capimsg_setu32(skb->data, 12, (u32) skb->data); /* Data32 */ | |
547 | capimsg_setu16(skb->data, 16, len); /* Data length */ | |
548 | capimsg_setu16(skb->data, 18, datahandle); | |
549 | capimsg_setu16(skb->data, 20, 0); /* Flags */ | |
550 | ||
551 | if (capincci_add_ack(mp, datahandle) < 0) { | |
552 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); | |
553 | skb_queue_head(&mp->outqueue, skb); | |
554 | return count; | |
555 | } | |
556 | errcode = capi20_put_message(mp->ap, skb); | |
557 | if (errcode == CAPI_NOERROR) { | |
558 | mp->datahandle++; | |
559 | count++; | |
560 | mp->outbytes -= len; | |
561 | #ifdef _DEBUG_DATAFLOW | |
562 | printk(KERN_DEBUG "capi: DATA_B3_REQ %u len=%u\n", | |
563 | datahandle, len); | |
564 | #endif | |
565 | continue; | |
566 | } | |
567 | capiminor_del_ack(mp, datahandle); | |
568 | ||
569 | if (errcode == CAPI_SENDQUEUEFULL) { | |
570 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); | |
571 | skb_queue_head(&mp->outqueue, skb); | |
572 | break; | |
573 | } | |
574 | ||
575 | /* ups, drop packet */ | |
576 | printk(KERN_ERR "capi: put_message = %x\n", errcode); | |
577 | mp->outbytes -= len; | |
578 | kfree_skb(skb); | |
579 | } | |
580 | return count; | |
581 | } | |
582 | ||
583 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
584 | /* -------- function called by lower level -------------------------- */ | |
585 | ||
586 | static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb) | |
587 | { | |
588 | struct capidev *cdev = ap->private; | |
589 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
590 | struct capiminor *mp; | |
591 | u16 datahandle; | |
592 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
593 | struct capincci *np; | |
594 | u32 ncci; | |
595 | ||
596 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) { | |
597 | u16 info = CAPIMSG_U16(skb->data, 12); // Info field | |
598 | if (info == 0) { | |
599 | down(&cdev->ncci_list_sem); | |
600 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); | |
601 | up(&cdev->ncci_list_sem); | |
602 | } | |
603 | } | |
604 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) { | |
605 | down(&cdev->ncci_list_sem); | |
606 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); | |
607 | up(&cdev->ncci_list_sem); | |
608 | } | |
609 | if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) { | |
610 | skb_queue_tail(&cdev->recvqueue, skb); | |
611 | wake_up_interruptible(&cdev->recvwait); | |
612 | return; | |
613 | } | |
614 | ncci = CAPIMSG_CONTROL(skb->data); | |
615 | for (np = cdev->nccis; np && np->ncci != ncci; np = np->next) | |
616 | ; | |
617 | if (!np) { | |
618 | printk(KERN_ERR "BUG: capi_signal: ncci not found\n"); | |
619 | skb_queue_tail(&cdev->recvqueue, skb); | |
620 | wake_up_interruptible(&cdev->recvwait); | |
621 | return; | |
622 | } | |
623 | #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE | |
624 | skb_queue_tail(&cdev->recvqueue, skb); | |
625 | wake_up_interruptible(&cdev->recvwait); | |
626 | #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
627 | mp = np->minorp; | |
628 | if (!mp) { | |
629 | skb_queue_tail(&cdev->recvqueue, skb); | |
630 | wake_up_interruptible(&cdev->recvwait); | |
631 | return; | |
632 | } | |
633 | ||
634 | ||
635 | if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) { | |
636 | ||
637 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+4+2); | |
638 | #ifdef _DEBUG_DATAFLOW | |
639 | printk(KERN_DEBUG "capi_signal: DATA_B3_IND %u len=%d\n", | |
640 | datahandle, skb->len-CAPIMSG_LEN(skb->data)); | |
641 | #endif | |
642 | skb_queue_tail(&mp->inqueue, skb); | |
643 | mp->inbytes += skb->len; | |
644 | handle_minor_recv(mp); | |
645 | ||
646 | } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) { | |
647 | ||
648 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4); | |
649 | #ifdef _DEBUG_DATAFLOW | |
650 | printk(KERN_DEBUG "capi_signal: DATA_B3_CONF %u 0x%x\n", | |
651 | datahandle, | |
652 | CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+2)); | |
653 | #endif | |
654 | kfree_skb(skb); | |
655 | (void)capiminor_del_ack(mp, datahandle); | |
656 | if (mp->tty) | |
657 | tty_wakeup(mp->tty); | |
658 | (void)handle_minor_send(mp); | |
659 | ||
660 | } else { | |
661 | /* ups, let capi application handle it :-) */ | |
662 | skb_queue_tail(&cdev->recvqueue, skb); | |
663 | wake_up_interruptible(&cdev->recvwait); | |
664 | } | |
665 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
666 | } | |
667 | ||
668 | /* -------- file_operations for capidev ----------------------------- */ | |
669 | ||
670 | static ssize_t | |
671 | capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
672 | { | |
673 | struct capidev *cdev = (struct capidev *)file->private_data; | |
674 | struct sk_buff *skb; | |
675 | size_t copied; | |
676 | ||
677 | if (!cdev->ap.applid) | |
678 | return -ENODEV; | |
679 | ||
680 | if ((skb = skb_dequeue(&cdev->recvqueue)) == 0) { | |
681 | ||
682 | if (file->f_flags & O_NONBLOCK) | |
683 | return -EAGAIN; | |
684 | ||
685 | for (;;) { | |
686 | interruptible_sleep_on(&cdev->recvwait); | |
687 | if ((skb = skb_dequeue(&cdev->recvqueue)) != 0) | |
688 | break; | |
689 | if (signal_pending(current)) | |
690 | break; | |
691 | } | |
692 | if (skb == 0) | |
693 | return -ERESTARTNOHAND; | |
694 | } | |
695 | if (skb->len > count) { | |
696 | skb_queue_head(&cdev->recvqueue, skb); | |
697 | return -EMSGSIZE; | |
698 | } | |
699 | if (copy_to_user(buf, skb->data, skb->len)) { | |
700 | skb_queue_head(&cdev->recvqueue, skb); | |
701 | return -EFAULT; | |
702 | } | |
703 | copied = skb->len; | |
704 | ||
705 | kfree_skb(skb); | |
706 | ||
707 | return copied; | |
708 | } | |
709 | ||
710 | static ssize_t | |
711 | capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
712 | { | |
713 | struct capidev *cdev = (struct capidev *)file->private_data; | |
714 | struct sk_buff *skb; | |
715 | u16 mlen; | |
716 | ||
717 | if (!cdev->ap.applid) | |
718 | return -ENODEV; | |
719 | ||
720 | skb = alloc_skb(count, GFP_USER); | |
721 | if (!skb) | |
722 | return -ENOMEM; | |
723 | ||
724 | if (copy_from_user(skb_put(skb, count), buf, count)) { | |
725 | kfree_skb(skb); | |
726 | return -EFAULT; | |
727 | } | |
728 | mlen = CAPIMSG_LEN(skb->data); | |
729 | if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) { | |
730 | if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) { | |
731 | kfree_skb(skb); | |
732 | return -EINVAL; | |
733 | } | |
734 | } else { | |
735 | if (mlen != count) { | |
736 | kfree_skb(skb); | |
737 | return -EINVAL; | |
738 | } | |
739 | } | |
740 | CAPIMSG_SETAPPID(skb->data, cdev->ap.applid); | |
741 | ||
742 | if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) { | |
743 | down(&cdev->ncci_list_sem); | |
744 | capincci_free(cdev, CAPIMSG_NCCI(skb->data)); | |
745 | up(&cdev->ncci_list_sem); | |
746 | } | |
747 | ||
748 | cdev->errcode = capi20_put_message(&cdev->ap, skb); | |
749 | ||
750 | if (cdev->errcode) { | |
751 | kfree_skb(skb); | |
752 | return -EIO; | |
753 | } | |
754 | return count; | |
755 | } | |
756 | ||
757 | static unsigned int | |
758 | capi_poll(struct file *file, poll_table * wait) | |
759 | { | |
760 | struct capidev *cdev = (struct capidev *)file->private_data; | |
761 | unsigned int mask = 0; | |
762 | ||
763 | if (!cdev->ap.applid) | |
764 | return POLLERR; | |
765 | ||
766 | poll_wait(file, &(cdev->recvwait), wait); | |
767 | mask = POLLOUT | POLLWRNORM; | |
768 | if (!skb_queue_empty(&cdev->recvqueue)) | |
769 | mask |= POLLIN | POLLRDNORM; | |
770 | return mask; | |
771 | } | |
772 | ||
773 | static int | |
774 | capi_ioctl(struct inode *inode, struct file *file, | |
775 | unsigned int cmd, unsigned long arg) | |
776 | { | |
777 | struct capidev *cdev = file->private_data; | |
778 | struct capi20_appl *ap = &cdev->ap; | |
779 | capi_ioctl_struct data; | |
780 | int retval = -EINVAL; | |
781 | void __user *argp = (void __user *)arg; | |
782 | ||
783 | switch (cmd) { | |
784 | case CAPI_REGISTER: | |
785 | { | |
786 | if (ap->applid) | |
787 | return -EEXIST; | |
788 | ||
789 | if (copy_from_user(&cdev->ap.rparam, argp, | |
790 | sizeof(struct capi_register_params))) | |
791 | return -EFAULT; | |
792 | ||
793 | cdev->ap.private = cdev; | |
794 | cdev->ap.recv_message = capi_recv_message; | |
795 | cdev->errcode = capi20_register(ap); | |
796 | if (cdev->errcode) { | |
797 | ap->applid = 0; | |
798 | return -EIO; | |
799 | } | |
800 | } | |
801 | return (int)ap->applid; | |
802 | ||
803 | case CAPI_GET_VERSION: | |
804 | { | |
805 | if (copy_from_user(&data.contr, argp, | |
806 | sizeof(data.contr))) | |
807 | return -EFAULT; | |
808 | cdev->errcode = capi20_get_version(data.contr, &data.version); | |
809 | if (cdev->errcode) | |
810 | return -EIO; | |
811 | if (copy_to_user(argp, &data.version, | |
812 | sizeof(data.version))) | |
813 | return -EFAULT; | |
814 | } | |
815 | return 0; | |
816 | ||
817 | case CAPI_GET_SERIAL: | |
818 | { | |
819 | if (copy_from_user(&data.contr, argp, | |
820 | sizeof(data.contr))) | |
821 | return -EFAULT; | |
822 | cdev->errcode = capi20_get_serial (data.contr, data.serial); | |
823 | if (cdev->errcode) | |
824 | return -EIO; | |
825 | if (copy_to_user(argp, data.serial, | |
826 | sizeof(data.serial))) | |
827 | return -EFAULT; | |
828 | } | |
829 | return 0; | |
830 | case CAPI_GET_PROFILE: | |
831 | { | |
832 | if (copy_from_user(&data.contr, argp, | |
833 | sizeof(data.contr))) | |
834 | return -EFAULT; | |
835 | ||
836 | if (data.contr == 0) { | |
837 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); | |
838 | if (cdev->errcode) | |
839 | return -EIO; | |
840 | ||
841 | retval = copy_to_user(argp, | |
842 | &data.profile.ncontroller, | |
843 | sizeof(data.profile.ncontroller)); | |
844 | ||
845 | } else { | |
846 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); | |
847 | if (cdev->errcode) | |
848 | return -EIO; | |
849 | ||
850 | retval = copy_to_user(argp, &data.profile, | |
851 | sizeof(data.profile)); | |
852 | } | |
853 | if (retval) | |
854 | return -EFAULT; | |
855 | } | |
856 | return 0; | |
857 | ||
858 | case CAPI_GET_MANUFACTURER: | |
859 | { | |
860 | if (copy_from_user(&data.contr, argp, | |
861 | sizeof(data.contr))) | |
862 | return -EFAULT; | |
863 | cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer); | |
864 | if (cdev->errcode) | |
865 | return -EIO; | |
866 | ||
867 | if (copy_to_user(argp, data.manufacturer, | |
868 | sizeof(data.manufacturer))) | |
869 | return -EFAULT; | |
870 | ||
871 | } | |
872 | return 0; | |
873 | case CAPI_GET_ERRCODE: | |
874 | data.errcode = cdev->errcode; | |
875 | cdev->errcode = CAPI_NOERROR; | |
876 | if (arg) { | |
877 | if (copy_to_user(argp, &data.errcode, | |
878 | sizeof(data.errcode))) | |
879 | return -EFAULT; | |
880 | } | |
881 | return data.errcode; | |
882 | ||
883 | case CAPI_INSTALLED: | |
884 | if (capi20_isinstalled() == CAPI_NOERROR) | |
885 | return 0; | |
886 | return -ENXIO; | |
887 | ||
888 | case CAPI_MANUFACTURER_CMD: | |
889 | { | |
890 | struct capi_manufacturer_cmd mcmd; | |
891 | if (!capable(CAP_SYS_ADMIN)) | |
892 | return -EPERM; | |
893 | if (copy_from_user(&mcmd, argp, sizeof(mcmd))) | |
894 | return -EFAULT; | |
895 | return capi20_manufacturer(mcmd.cmd, mcmd.data); | |
896 | } | |
897 | return 0; | |
898 | ||
899 | case CAPI_SET_FLAGS: | |
900 | case CAPI_CLR_FLAGS: | |
901 | { | |
902 | unsigned userflags; | |
903 | if (copy_from_user(&userflags, argp, | |
904 | sizeof(userflags))) | |
905 | return -EFAULT; | |
906 | if (cmd == CAPI_SET_FLAGS) | |
907 | cdev->userflags |= userflags; | |
908 | else | |
909 | cdev->userflags &= ~userflags; | |
910 | } | |
911 | return 0; | |
912 | ||
913 | case CAPI_GET_FLAGS: | |
914 | if (copy_to_user(argp, &cdev->userflags, | |
915 | sizeof(cdev->userflags))) | |
916 | return -EFAULT; | |
917 | return 0; | |
918 | ||
919 | case CAPI_NCCI_OPENCOUNT: | |
920 | { | |
921 | struct capincci *nccip; | |
922 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
923 | struct capiminor *mp; | |
924 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
925 | unsigned ncci; | |
926 | int count = 0; | |
927 | if (copy_from_user(&ncci, argp, sizeof(ncci))) | |
928 | return -EFAULT; | |
929 | ||
930 | down(&cdev->ncci_list_sem); | |
931 | if ((nccip = capincci_find(cdev, (u32) ncci)) == 0) { | |
932 | up(&cdev->ncci_list_sem); | |
933 | return 0; | |
934 | } | |
935 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
936 | if ((mp = nccip->minorp) != 0) { | |
937 | count += atomic_read(&mp->ttyopencount); | |
938 | } | |
939 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
940 | up(&cdev->ncci_list_sem); | |
941 | return count; | |
942 | } | |
943 | return 0; | |
944 | ||
945 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
946 | case CAPI_NCCI_GETUNIT: | |
947 | { | |
948 | struct capincci *nccip; | |
949 | struct capiminor *mp; | |
950 | unsigned ncci; | |
951 | int unit = 0; | |
952 | if (copy_from_user(&ncci, argp, | |
953 | sizeof(ncci))) | |
954 | return -EFAULT; | |
955 | down(&cdev->ncci_list_sem); | |
956 | nccip = capincci_find(cdev, (u32) ncci); | |
957 | if (!nccip || (mp = nccip->minorp) == 0) { | |
958 | up(&cdev->ncci_list_sem); | |
959 | return -ESRCH; | |
960 | } | |
961 | unit = mp->minor; | |
962 | up(&cdev->ncci_list_sem); | |
963 | return unit; | |
964 | } | |
965 | return 0; | |
966 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
967 | } | |
968 | return -EINVAL; | |
969 | } | |
970 | ||
971 | static int | |
972 | capi_open(struct inode *inode, struct file *file) | |
973 | { | |
974 | if (file->private_data) | |
975 | return -EEXIST; | |
976 | ||
977 | if ((file->private_data = capidev_alloc()) == 0) | |
978 | return -ENOMEM; | |
979 | ||
980 | return nonseekable_open(inode, file); | |
981 | } | |
982 | ||
983 | static int | |
984 | capi_release(struct inode *inode, struct file *file) | |
985 | { | |
986 | struct capidev *cdev = (struct capidev *)file->private_data; | |
987 | ||
988 | capidev_free(cdev); | |
989 | file->private_data = NULL; | |
990 | ||
991 | return 0; | |
992 | } | |
993 | ||
994 | static struct file_operations capi_fops = | |
995 | { | |
996 | .owner = THIS_MODULE, | |
997 | .llseek = no_llseek, | |
998 | .read = capi_read, | |
999 | .write = capi_write, | |
1000 | .poll = capi_poll, | |
1001 | .ioctl = capi_ioctl, | |
1002 | .open = capi_open, | |
1003 | .release = capi_release, | |
1004 | }; | |
1005 | ||
1006 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
1007 | /* -------- tty_operations for capincci ----------------------------- */ | |
1008 | ||
1009 | static int capinc_tty_open(struct tty_struct * tty, struct file * file) | |
1010 | { | |
1011 | struct capiminor *mp; | |
1012 | ||
1013 | if ((mp = capiminor_find(iminor(file->f_dentry->d_inode))) == 0) | |
1014 | return -ENXIO; | |
1015 | if (mp->nccip == 0) | |
1016 | return -ENXIO; | |
1017 | ||
1018 | tty->driver_data = (void *)mp; | |
1019 | ||
1020 | if (atomic_read(&mp->ttyopencount) == 0) | |
1021 | mp->tty = tty; | |
1022 | atomic_inc(&mp->ttyopencount); | |
1023 | #ifdef _DEBUG_REFCOUNT | |
1024 | printk(KERN_DEBUG "capinc_tty_open ocount=%d\n", atomic_read(&mp->ttyopencount)); | |
1025 | #endif | |
1026 | handle_minor_recv(mp); | |
1027 | return 0; | |
1028 | } | |
1029 | ||
1030 | static void capinc_tty_close(struct tty_struct * tty, struct file * file) | |
1031 | { | |
1032 | struct capiminor *mp; | |
1033 | ||
1034 | mp = (struct capiminor *)tty->driver_data; | |
1035 | if (mp) { | |
1036 | if (atomic_dec_and_test(&mp->ttyopencount)) { | |
1037 | #ifdef _DEBUG_REFCOUNT | |
1038 | printk(KERN_DEBUG "capinc_tty_close lastclose\n"); | |
1039 | #endif | |
1040 | tty->driver_data = NULL; | |
1041 | mp->tty = NULL; | |
1042 | } | |
1043 | #ifdef _DEBUG_REFCOUNT | |
1044 | printk(KERN_DEBUG "capinc_tty_close ocount=%d\n", atomic_read(&mp->ttyopencount)); | |
1045 | #endif | |
1046 | if (mp->nccip == 0) | |
1047 | capiminor_free(mp); | |
1048 | } | |
1049 | ||
1050 | #ifdef _DEBUG_REFCOUNT | |
1051 | printk(KERN_DEBUG "capinc_tty_close\n"); | |
1052 | #endif | |
1053 | } | |
1054 | ||
1055 | static int capinc_tty_write(struct tty_struct * tty, | |
1056 | const unsigned char *buf, int count) | |
1057 | { | |
1058 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1059 | struct sk_buff *skb; | |
1060 | ||
1061 | #ifdef _DEBUG_TTYFUNCS | |
1062 | printk(KERN_DEBUG "capinc_tty_write(count=%d)\n", count); | |
1063 | #endif | |
1064 | ||
1065 | if (!mp || !mp->nccip) { | |
1066 | #ifdef _DEBUG_TTYFUNCS | |
1067 | printk(KERN_DEBUG "capinc_tty_write: mp or mp->ncci NULL\n"); | |
1068 | #endif | |
1069 | return 0; | |
1070 | } | |
1071 | ||
1072 | skb = mp->ttyskb; | |
1073 | if (skb) { | |
1074 | mp->ttyskb = NULL; | |
1075 | skb_queue_tail(&mp->outqueue, skb); | |
1076 | mp->outbytes += skb->len; | |
1077 | } | |
1078 | ||
1079 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC); | |
1080 | if (!skb) { | |
1081 | printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n"); | |
1082 | return -ENOMEM; | |
1083 | } | |
1084 | ||
1085 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); | |
1086 | memcpy(skb_put(skb, count), buf, count); | |
1087 | ||
1088 | skb_queue_tail(&mp->outqueue, skb); | |
1089 | mp->outbytes += skb->len; | |
1090 | (void)handle_minor_send(mp); | |
1091 | (void)handle_minor_recv(mp); | |
1092 | return count; | |
1093 | } | |
1094 | ||
1095 | static void capinc_tty_put_char(struct tty_struct *tty, unsigned char ch) | |
1096 | { | |
1097 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1098 | struct sk_buff *skb; | |
1099 | ||
1100 | #ifdef _DEBUG_TTYFUNCS | |
1101 | printk(KERN_DEBUG "capinc_put_char(%u)\n", ch); | |
1102 | #endif | |
1103 | ||
1104 | if (!mp || !mp->nccip) { | |
1105 | #ifdef _DEBUG_TTYFUNCS | |
1106 | printk(KERN_DEBUG "capinc_tty_put_char: mp or mp->ncci NULL\n"); | |
1107 | #endif | |
1108 | return; | |
1109 | } | |
1110 | ||
1111 | skb = mp->ttyskb; | |
1112 | if (skb) { | |
1113 | if (skb_tailroom(skb) > 0) { | |
1114 | *(skb_put(skb, 1)) = ch; | |
1115 | return; | |
1116 | } | |
1117 | mp->ttyskb = NULL; | |
1118 | skb_queue_tail(&mp->outqueue, skb); | |
1119 | mp->outbytes += skb->len; | |
1120 | (void)handle_minor_send(mp); | |
1121 | } | |
1122 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+CAPI_MAX_BLKSIZE, GFP_ATOMIC); | |
1123 | if (skb) { | |
1124 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); | |
1125 | *(skb_put(skb, 1)) = ch; | |
1126 | mp->ttyskb = skb; | |
1127 | } else { | |
1128 | printk(KERN_ERR "capinc_put_char: char %u lost\n", ch); | |
1129 | } | |
1130 | } | |
1131 | ||
1132 | static void capinc_tty_flush_chars(struct tty_struct *tty) | |
1133 | { | |
1134 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1135 | struct sk_buff *skb; | |
1136 | ||
1137 | #ifdef _DEBUG_TTYFUNCS | |
1138 | printk(KERN_DEBUG "capinc_tty_flush_chars\n"); | |
1139 | #endif | |
1140 | ||
1141 | if (!mp || !mp->nccip) { | |
1142 | #ifdef _DEBUG_TTYFUNCS | |
1143 | printk(KERN_DEBUG "capinc_tty_flush_chars: mp or mp->ncci NULL\n"); | |
1144 | #endif | |
1145 | return; | |
1146 | } | |
1147 | ||
1148 | skb = mp->ttyskb; | |
1149 | if (skb) { | |
1150 | mp->ttyskb = NULL; | |
1151 | skb_queue_tail(&mp->outqueue, skb); | |
1152 | mp->outbytes += skb->len; | |
1153 | (void)handle_minor_send(mp); | |
1154 | } | |
1155 | (void)handle_minor_recv(mp); | |
1156 | } | |
1157 | ||
1158 | static int capinc_tty_write_room(struct tty_struct *tty) | |
1159 | { | |
1160 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1161 | int room; | |
1162 | if (!mp || !mp->nccip) { | |
1163 | #ifdef _DEBUG_TTYFUNCS | |
1164 | printk(KERN_DEBUG "capinc_tty_write_room: mp or mp->ncci NULL\n"); | |
1165 | #endif | |
1166 | return 0; | |
1167 | } | |
1168 | room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue); | |
1169 | room *= CAPI_MAX_BLKSIZE; | |
1170 | #ifdef _DEBUG_TTYFUNCS | |
1171 | printk(KERN_DEBUG "capinc_tty_write_room = %d\n", room); | |
1172 | #endif | |
1173 | return room; | |
1174 | } | |
1175 | ||
408b664a | 1176 | static int capinc_tty_chars_in_buffer(struct tty_struct *tty) |
1da177e4 LT |
1177 | { |
1178 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1179 | if (!mp || !mp->nccip) { | |
1180 | #ifdef _DEBUG_TTYFUNCS | |
1181 | printk(KERN_DEBUG "capinc_tty_chars_in_buffer: mp or mp->ncci NULL\n"); | |
1182 | #endif | |
1183 | return 0; | |
1184 | } | |
1185 | #ifdef _DEBUG_TTYFUNCS | |
1186 | printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n", | |
1187 | mp->outbytes, mp->nack, | |
1188 | skb_queue_len(&mp->outqueue), | |
1189 | skb_queue_len(&mp->inqueue)); | |
1190 | #endif | |
1191 | return mp->outbytes; | |
1192 | } | |
1193 | ||
1194 | static int capinc_tty_ioctl(struct tty_struct *tty, struct file * file, | |
1195 | unsigned int cmd, unsigned long arg) | |
1196 | { | |
1197 | int error = 0; | |
1198 | switch (cmd) { | |
1199 | default: | |
1200 | error = n_tty_ioctl (tty, file, cmd, arg); | |
1201 | break; | |
1202 | } | |
1203 | return error; | |
1204 | } | |
1205 | ||
1206 | static void capinc_tty_set_termios(struct tty_struct *tty, struct termios * old) | |
1207 | { | |
1208 | #ifdef _DEBUG_TTYFUNCS | |
1209 | printk(KERN_DEBUG "capinc_tty_set_termios\n"); | |
1210 | #endif | |
1211 | } | |
1212 | ||
1213 | static void capinc_tty_throttle(struct tty_struct * tty) | |
1214 | { | |
1215 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1216 | #ifdef _DEBUG_TTYFUNCS | |
1217 | printk(KERN_DEBUG "capinc_tty_throttle\n"); | |
1218 | #endif | |
1219 | if (mp) | |
1220 | mp->ttyinstop = 1; | |
1221 | } | |
1222 | ||
1223 | static void capinc_tty_unthrottle(struct tty_struct * tty) | |
1224 | { | |
1225 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1226 | #ifdef _DEBUG_TTYFUNCS | |
1227 | printk(KERN_DEBUG "capinc_tty_unthrottle\n"); | |
1228 | #endif | |
1229 | if (mp) { | |
1230 | mp->ttyinstop = 0; | |
1231 | handle_minor_recv(mp); | |
1232 | } | |
1233 | } | |
1234 | ||
1235 | static void capinc_tty_stop(struct tty_struct *tty) | |
1236 | { | |
1237 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1238 | #ifdef _DEBUG_TTYFUNCS | |
1239 | printk(KERN_DEBUG "capinc_tty_stop\n"); | |
1240 | #endif | |
1241 | if (mp) { | |
1242 | mp->ttyoutstop = 1; | |
1243 | } | |
1244 | } | |
1245 | ||
1246 | static void capinc_tty_start(struct tty_struct *tty) | |
1247 | { | |
1248 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1249 | #ifdef _DEBUG_TTYFUNCS | |
1250 | printk(KERN_DEBUG "capinc_tty_start\n"); | |
1251 | #endif | |
1252 | if (mp) { | |
1253 | mp->ttyoutstop = 0; | |
1254 | (void)handle_minor_send(mp); | |
1255 | } | |
1256 | } | |
1257 | ||
1258 | static void capinc_tty_hangup(struct tty_struct *tty) | |
1259 | { | |
1260 | #ifdef _DEBUG_TTYFUNCS | |
1261 | printk(KERN_DEBUG "capinc_tty_hangup\n"); | |
1262 | #endif | |
1263 | } | |
1264 | ||
1265 | static void capinc_tty_break_ctl(struct tty_struct *tty, int state) | |
1266 | { | |
1267 | #ifdef _DEBUG_TTYFUNCS | |
1268 | printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state); | |
1269 | #endif | |
1270 | } | |
1271 | ||
1272 | static void capinc_tty_flush_buffer(struct tty_struct *tty) | |
1273 | { | |
1274 | #ifdef _DEBUG_TTYFUNCS | |
1275 | printk(KERN_DEBUG "capinc_tty_flush_buffer\n"); | |
1276 | #endif | |
1277 | } | |
1278 | ||
1279 | static void capinc_tty_set_ldisc(struct tty_struct *tty) | |
1280 | { | |
1281 | #ifdef _DEBUG_TTYFUNCS | |
1282 | printk(KERN_DEBUG "capinc_tty_set_ldisc\n"); | |
1283 | #endif | |
1284 | } | |
1285 | ||
1286 | static void capinc_tty_send_xchar(struct tty_struct *tty, char ch) | |
1287 | { | |
1288 | #ifdef _DEBUG_TTYFUNCS | |
1289 | printk(KERN_DEBUG "capinc_tty_send_xchar(%d)\n", ch); | |
1290 | #endif | |
1291 | } | |
1292 | ||
1293 | static int capinc_tty_read_proc(char *page, char **start, off_t off, | |
1294 | int count, int *eof, void *data) | |
1295 | { | |
1296 | return 0; | |
1297 | } | |
1298 | ||
1299 | static struct tty_driver *capinc_tty_driver; | |
1300 | ||
1301 | static struct tty_operations capinc_ops = { | |
1302 | .open = capinc_tty_open, | |
1303 | .close = capinc_tty_close, | |
1304 | .write = capinc_tty_write, | |
1305 | .put_char = capinc_tty_put_char, | |
1306 | .flush_chars = capinc_tty_flush_chars, | |
1307 | .write_room = capinc_tty_write_room, | |
1308 | .chars_in_buffer = capinc_tty_chars_in_buffer, | |
1309 | .ioctl = capinc_tty_ioctl, | |
1310 | .set_termios = capinc_tty_set_termios, | |
1311 | .throttle = capinc_tty_throttle, | |
1312 | .unthrottle = capinc_tty_unthrottle, | |
1313 | .stop = capinc_tty_stop, | |
1314 | .start = capinc_tty_start, | |
1315 | .hangup = capinc_tty_hangup, | |
1316 | .break_ctl = capinc_tty_break_ctl, | |
1317 | .flush_buffer = capinc_tty_flush_buffer, | |
1318 | .set_ldisc = capinc_tty_set_ldisc, | |
1319 | .send_xchar = capinc_tty_send_xchar, | |
1320 | .read_proc = capinc_tty_read_proc, | |
1321 | }; | |
1322 | ||
1323 | static int capinc_tty_init(void) | |
1324 | { | |
1325 | struct tty_driver *drv; | |
1326 | ||
1327 | if (capi_ttyminors > CAPINC_MAX_PORTS) | |
1328 | capi_ttyminors = CAPINC_MAX_PORTS; | |
1329 | if (capi_ttyminors <= 0) | |
1330 | capi_ttyminors = CAPINC_NR_PORTS; | |
1331 | ||
1332 | drv = alloc_tty_driver(capi_ttyminors); | |
1333 | if (!drv) | |
1334 | return -ENOMEM; | |
1335 | ||
1336 | drv->owner = THIS_MODULE; | |
1337 | drv->driver_name = "capi_nc"; | |
1da177e4 LT |
1338 | drv->name = "capi"; |
1339 | drv->major = capi_ttymajor; | |
1340 | drv->minor_start = 0; | |
1341 | drv->type = TTY_DRIVER_TYPE_SERIAL; | |
1342 | drv->subtype = SERIAL_TYPE_NORMAL; | |
1343 | drv->init_termios = tty_std_termios; | |
1344 | drv->init_termios.c_iflag = ICRNL; | |
1345 | drv->init_termios.c_oflag = OPOST | ONLCR; | |
1346 | drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
1347 | drv->init_termios.c_lflag = 0; | |
1348 | drv->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_RESET_TERMIOS; | |
1349 | tty_set_operations(drv, &capinc_ops); | |
1350 | if (tty_register_driver(drv)) { | |
1351 | put_tty_driver(drv); | |
1352 | printk(KERN_ERR "Couldn't register capi_nc driver\n"); | |
1353 | return -1; | |
1354 | } | |
1355 | capinc_tty_driver = drv; | |
1356 | return 0; | |
1357 | } | |
1358 | ||
1359 | static void capinc_tty_exit(void) | |
1360 | { | |
1361 | struct tty_driver *drv = capinc_tty_driver; | |
1362 | int retval; | |
1363 | if ((retval = tty_unregister_driver(drv))) | |
1364 | printk(KERN_ERR "capi: failed to unregister capi_nc driver (%d)\n", retval); | |
1365 | put_tty_driver(drv); | |
1366 | } | |
1367 | ||
1368 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
1369 | ||
1370 | /* -------- /proc functions ----------------------------------------- */ | |
1371 | ||
1372 | /* | |
1373 | * /proc/capi/capi20: | |
1374 | * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt | |
1375 | */ | |
1376 | static int proc_capidev_read_proc(char *page, char **start, off_t off, | |
1377 | int count, int *eof, void *data) | |
1378 | { | |
1379 | struct capidev *cdev; | |
1380 | struct list_head *l; | |
1381 | int len = 0; | |
1382 | ||
1383 | read_lock(&capidev_list_lock); | |
1384 | list_for_each(l, &capidev_list) { | |
1385 | cdev = list_entry(l, struct capidev, list); | |
1386 | len += sprintf(page+len, "0 %d %lu %lu %lu %lu\n", | |
1387 | cdev->ap.applid, | |
1388 | cdev->ap.nrecvctlpkt, | |
1389 | cdev->ap.nrecvdatapkt, | |
1390 | cdev->ap.nsentctlpkt, | |
1391 | cdev->ap.nsentdatapkt); | |
1392 | if (len <= off) { | |
1393 | off -= len; | |
1394 | len = 0; | |
1395 | } else { | |
1396 | if (len-off > count) | |
1397 | goto endloop; | |
1398 | } | |
1399 | } | |
1400 | ||
1401 | endloop: | |
1402 | read_unlock(&capidev_list_lock); | |
1403 | if (len < count) | |
1404 | *eof = 1; | |
1405 | if (len > count) len = count; | |
1406 | if (len < 0) len = 0; | |
1407 | return len; | |
1408 | } | |
1409 | ||
1410 | /* | |
1411 | * /proc/capi/capi20ncci: | |
1412 | * applid ncci | |
1413 | */ | |
1414 | static int proc_capincci_read_proc(char *page, char **start, off_t off, | |
1415 | int count, int *eof, void *data) | |
1416 | { | |
1417 | struct capidev *cdev; | |
1418 | struct capincci *np; | |
1419 | struct list_head *l; | |
1420 | int len = 0; | |
1421 | ||
1422 | read_lock(&capidev_list_lock); | |
1423 | list_for_each(l, &capidev_list) { | |
1424 | cdev = list_entry(l, struct capidev, list); | |
1425 | for (np=cdev->nccis; np; np = np->next) { | |
1426 | len += sprintf(page+len, "%d 0x%x\n", | |
1427 | cdev->ap.applid, | |
1428 | np->ncci); | |
1429 | if (len <= off) { | |
1430 | off -= len; | |
1431 | len = 0; | |
1432 | } else { | |
1433 | if (len-off > count) | |
1434 | goto endloop; | |
1435 | } | |
1436 | } | |
1437 | } | |
1438 | endloop: | |
1439 | read_unlock(&capidev_list_lock); | |
1440 | *start = page+off; | |
1441 | if (len < count) | |
1442 | *eof = 1; | |
1443 | if (len>count) len = count; | |
1444 | if (len<0) len = 0; | |
1445 | return len; | |
1446 | } | |
1447 | ||
1448 | static struct procfsentries { | |
1449 | char *name; | |
1450 | mode_t mode; | |
1451 | int (*read_proc)(char *page, char **start, off_t off, | |
1452 | int count, int *eof, void *data); | |
1453 | struct proc_dir_entry *procent; | |
1454 | } procfsentries[] = { | |
1455 | /* { "capi", S_IFDIR, 0 }, */ | |
1456 | { "capi/capi20", 0 , proc_capidev_read_proc }, | |
1457 | { "capi/capi20ncci", 0 , proc_capincci_read_proc }, | |
1458 | }; | |
1459 | ||
1460 | static void __init proc_init(void) | |
1461 | { | |
1462 | int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]); | |
1463 | int i; | |
1464 | ||
1465 | for (i=0; i < nelem; i++) { | |
1466 | struct procfsentries *p = procfsentries + i; | |
1467 | p->procent = create_proc_entry(p->name, p->mode, NULL); | |
1468 | if (p->procent) p->procent->read_proc = p->read_proc; | |
1469 | } | |
1470 | } | |
1471 | ||
1472 | static void __exit proc_exit(void) | |
1473 | { | |
1474 | int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]); | |
1475 | int i; | |
1476 | ||
1477 | for (i=nelem-1; i >= 0; i--) { | |
1478 | struct procfsentries *p = procfsentries + i; | |
1479 | if (p->procent) { | |
1480 | remove_proc_entry(p->name, NULL); | |
1481 | p->procent = NULL; | |
1482 | } | |
1483 | } | |
1484 | } | |
1485 | ||
1486 | /* -------- init function and module interface ---------------------- */ | |
1487 | ||
1488 | ||
1489 | static char rev[32]; | |
1490 | ||
1491 | static int __init capi_init(void) | |
1492 | { | |
1493 | char *p; | |
1494 | char *compileinfo; | |
6d9eac34 | 1495 | int major_ret; |
1da177e4 LT |
1496 | |
1497 | if ((p = strchr(revision, ':')) != 0 && p[1]) { | |
1498 | strlcpy(rev, p + 2, sizeof(rev)); | |
1499 | if ((p = strchr(rev, '$')) != 0 && p > rev) | |
1500 | *(p-1) = 0; | |
1501 | } else | |
1502 | strcpy(rev, "1.0"); | |
1503 | ||
6d9eac34 AM |
1504 | major_ret = register_chrdev(capi_major, "capi20", &capi_fops); |
1505 | if (major_ret < 0) { | |
1da177e4 | 1506 | printk(KERN_ERR "capi20: unable to get major %d\n", capi_major); |
6d9eac34 | 1507 | return major_ret; |
1da177e4 | 1508 | } |
56b22935 | 1509 | capi_class = class_create(THIS_MODULE, "capi"); |
1da177e4 LT |
1510 | if (IS_ERR(capi_class)) { |
1511 | unregister_chrdev(capi_major, "capi20"); | |
1512 | return PTR_ERR(capi_class); | |
1513 | } | |
1514 | ||
53f46542 | 1515 | class_device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi"); |
1da177e4 LT |
1516 | |
1517 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
1518 | if (capinc_tty_init() < 0) { | |
56b22935 | 1519 | class_device_destroy(capi_class, MKDEV(capi_major, 0)); |
1520 | class_destroy(capi_class); | |
1da177e4 LT |
1521 | unregister_chrdev(capi_major, "capi20"); |
1522 | return -ENOMEM; | |
1523 | } | |
1524 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
1525 | ||
1526 | proc_init(); | |
1527 | ||
1528 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
1529 | #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE) | |
1530 | compileinfo = " (middleware+capifs)"; | |
1531 | #else | |
1532 | compileinfo = " (no capifs)"; | |
1533 | #endif | |
1534 | #else | |
1535 | compileinfo = " (no middleware)"; | |
1536 | #endif | |
1537 | printk(KERN_NOTICE "capi20: Rev %s: started up with major %d%s\n", | |
1538 | rev, capi_major, compileinfo); | |
1539 | ||
1540 | return 0; | |
1541 | } | |
1542 | ||
1543 | static void __exit capi_exit(void) | |
1544 | { | |
1545 | proc_exit(); | |
1546 | ||
56b22935 | 1547 | class_device_destroy(capi_class, MKDEV(capi_major, 0)); |
1548 | class_destroy(capi_class); | |
1da177e4 | 1549 | unregister_chrdev(capi_major, "capi20"); |
1da177e4 LT |
1550 | |
1551 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
1552 | capinc_tty_exit(); | |
1553 | #endif | |
1554 | printk(KERN_NOTICE "capi: Rev %s: unloaded\n", rev); | |
1555 | } | |
1556 | ||
1557 | module_init(capi_init); | |
1558 | module_exit(capi_exit); |