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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 | ||
12 | #include <linux/config.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/errno.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/major.h> | |
17 | #include <linux/sched.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/fcntl.h> | |
20 | #include <linux/fs.h> | |
21 | #include <linux/signal.h> | |
22 | #include <linux/mm.h> | |
23 | #include <linux/smp_lock.h> | |
24 | #include <linux/timer.h> | |
25 | #include <linux/wait.h> | |
26 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
27 | #include <linux/tty.h> | |
28 | #ifdef CONFIG_PPP | |
29 | #include <linux/netdevice.h> | |
30 | #include <linux/ppp_defs.h> | |
31 | #include <linux/if_ppp.h> | |
32 | #endif /* CONFIG_PPP */ | |
33 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
34 | #include <linux/skbuff.h> | |
35 | #include <linux/proc_fs.h> | |
36 | #include <linux/poll.h> | |
37 | #include <linux/capi.h> | |
38 | #include <linux/kernelcapi.h> | |
39 | #include <linux/init.h> | |
40 | #include <linux/device.h> | |
41 | #include <linux/moduleparam.h> | |
1da177e4 LT |
42 | #include <linux/isdn/capiutil.h> |
43 | #include <linux/isdn/capicmd.h> | |
44 | #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE) | |
45 | #include "capifs.h" | |
46 | #endif | |
47 | ||
48 | static char *revision = "$Revision: 1.1.2.7 $"; | |
49 | ||
50 | MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface"); | |
51 | MODULE_AUTHOR("Carsten Paeth"); | |
52 | MODULE_LICENSE("GPL"); | |
53 | ||
54 | #undef _DEBUG_REFCOUNT /* alloc/free and open/close debug */ | |
55 | #undef _DEBUG_TTYFUNCS /* call to tty_driver */ | |
56 | #undef _DEBUG_DATAFLOW /* data flow */ | |
57 | ||
58 | /* -------- driver information -------------------------------------- */ | |
59 | ||
56b22935 | 60 | static struct class *capi_class; |
1da177e4 | 61 | |
408b664a | 62 | static int capi_major = 68; /* allocated */ |
1da177e4 LT |
63 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
64 | #define CAPINC_NR_PORTS 32 | |
65 | #define CAPINC_MAX_PORTS 256 | |
408b664a AB |
66 | static int capi_ttymajor = 191; |
67 | static int capi_ttyminors = CAPINC_NR_PORTS; | |
1da177e4 LT |
68 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
69 | ||
70 | module_param_named(major, capi_major, uint, 0); | |
71 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
72 | module_param_named(ttymajor, capi_ttymajor, uint, 0); | |
73 | module_param_named(ttyminors, capi_ttyminors, uint, 0); | |
74 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
75 | ||
76 | /* -------- defines ------------------------------------------------- */ | |
77 | ||
78 | #define CAPINC_MAX_RECVQUEUE 10 | |
79 | #define CAPINC_MAX_SENDQUEUE 10 | |
80 | #define CAPI_MAX_BLKSIZE 2048 | |
81 | ||
82 | /* -------- data structures ----------------------------------------- */ | |
83 | ||
84 | struct capidev; | |
85 | struct capincci; | |
86 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
87 | struct capiminor; | |
88 | ||
6aa65472 MB |
89 | struct datahandle_queue { |
90 | struct list_head list; | |
91 | u16 datahandle; | |
92 | }; | |
93 | ||
1da177e4 LT |
94 | struct capiminor { |
95 | struct list_head list; | |
96 | struct capincci *nccip; | |
97 | unsigned int minor; | |
98 | ||
99 | struct capi20_appl *ap; | |
100 | u32 ncci; | |
101 | u16 datahandle; | |
102 | u16 msgid; | |
103 | ||
104 | struct tty_struct *tty; | |
105 | int ttyinstop; | |
106 | int ttyoutstop; | |
107 | struct sk_buff *ttyskb; | |
108 | atomic_t ttyopencount; | |
109 | ||
110 | struct sk_buff_head inqueue; | |
111 | int inbytes; | |
112 | struct sk_buff_head outqueue; | |
113 | int outbytes; | |
114 | ||
115 | /* transmit path */ | |
6aa65472 | 116 | struct list_head ackqueue; |
1da177e4 | 117 | int nack; |
6aa65472 | 118 | spinlock_t ackqlock; |
1da177e4 LT |
119 | }; |
120 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
121 | ||
122 | struct capincci { | |
123 | struct capincci *next; | |
124 | u32 ncci; | |
125 | struct capidev *cdev; | |
126 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
127 | struct capiminor *minorp; | |
128 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
129 | }; | |
130 | ||
131 | struct capidev { | |
132 | struct list_head list; | |
133 | struct capi20_appl ap; | |
134 | u16 errcode; | |
135 | unsigned userflags; | |
136 | ||
137 | struct sk_buff_head recvqueue; | |
138 | wait_queue_head_t recvwait; | |
139 | ||
140 | struct capincci *nccis; | |
141 | ||
142 | struct semaphore ncci_list_sem; | |
143 | }; | |
144 | ||
145 | /* -------- global variables ---------------------------------------- */ | |
146 | ||
147 | static DEFINE_RWLOCK(capidev_list_lock); | |
148 | static LIST_HEAD(capidev_list); | |
149 | ||
150 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
151 | static DEFINE_RWLOCK(capiminor_list_lock); | |
152 | static LIST_HEAD(capiminor_list); | |
153 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
154 | ||
155 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
156 | /* -------- datahandles --------------------------------------------- */ | |
157 | ||
158 | static int capincci_add_ack(struct capiminor *mp, u16 datahandle) | |
159 | { | |
6aa65472 MB |
160 | struct datahandle_queue *n; |
161 | unsigned long flags; | |
1da177e4 LT |
162 | |
163 | n = kmalloc(sizeof(*n), GFP_ATOMIC); | |
6aa65472 MB |
164 | if (unlikely(!n)) { |
165 | printk(KERN_ERR "capi: alloc datahandle failed\n"); | |
166 | return -1; | |
1da177e4 | 167 | } |
1da177e4 | 168 | n->datahandle = datahandle; |
6aa65472 MB |
169 | INIT_LIST_HEAD(&n->list); |
170 | spin_lock_irqsave(&mp->ackqlock, flags); | |
171 | list_add_tail(&n->list, &mp->ackqueue); | |
1da177e4 | 172 | mp->nack++; |
6aa65472 | 173 | spin_unlock_irqrestore(&mp->ackqlock, flags); |
1da177e4 LT |
174 | return 0; |
175 | } | |
176 | ||
177 | static int capiminor_del_ack(struct capiminor *mp, u16 datahandle) | |
178 | { | |
6aa65472 MB |
179 | struct datahandle_queue *p, *tmp; |
180 | unsigned long flags; | |
1da177e4 | 181 | |
6aa65472 MB |
182 | spin_lock_irqsave(&mp->ackqlock, flags); |
183 | list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { | |
184 | if (p->datahandle == datahandle) { | |
185 | list_del(&p->list); | |
1da177e4 LT |
186 | kfree(p); |
187 | mp->nack--; | |
6aa65472 | 188 | spin_unlock_irqrestore(&mp->ackqlock, flags); |
1da177e4 LT |
189 | return 0; |
190 | } | |
191 | } | |
6aa65472 | 192 | spin_unlock_irqrestore(&mp->ackqlock, flags); |
1da177e4 LT |
193 | return -1; |
194 | } | |
195 | ||
196 | static void capiminor_del_all_ack(struct capiminor *mp) | |
197 | { | |
6aa65472 MB |
198 | struct datahandle_queue *p, *tmp; |
199 | unsigned long flags; | |
1da177e4 | 200 | |
6aa65472 MB |
201 | spin_lock_irqsave(&mp->ackqlock, flags); |
202 | list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { | |
203 | list_del(&p->list); | |
1da177e4 LT |
204 | kfree(p); |
205 | mp->nack--; | |
206 | } | |
6aa65472 | 207 | spin_unlock_irqrestore(&mp->ackqlock, flags); |
1da177e4 LT |
208 | } |
209 | ||
210 | ||
211 | /* -------- struct capiminor ---------------------------------------- */ | |
212 | ||
213 | static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci) | |
214 | { | |
215 | struct capiminor *mp, *p; | |
216 | unsigned int minor = 0; | |
217 | unsigned long flags; | |
218 | ||
219 | mp = kmalloc(sizeof(*mp), GFP_ATOMIC); | |
220 | if (!mp) { | |
221 | printk(KERN_ERR "capi: can't alloc capiminor\n"); | |
222 | return NULL; | |
223 | } | |
224 | ||
225 | memset(mp, 0, sizeof(struct capiminor)); | |
226 | mp->ap = ap; | |
227 | mp->ncci = ncci; | |
228 | mp->msgid = 0; | |
229 | atomic_set(&mp->ttyopencount,0); | |
6aa65472 MB |
230 | INIT_LIST_HEAD(&mp->ackqueue); |
231 | spin_lock_init(&mp->ackqlock); | |
1da177e4 LT |
232 | |
233 | skb_queue_head_init(&mp->inqueue); | |
234 | skb_queue_head_init(&mp->outqueue); | |
235 | ||
236 | /* Allocate the least unused minor number. | |
237 | */ | |
238 | write_lock_irqsave(&capiminor_list_lock, flags); | |
239 | if (list_empty(&capiminor_list)) | |
240 | list_add(&mp->list, &capiminor_list); | |
241 | else { | |
242 | list_for_each_entry(p, &capiminor_list, list) { | |
243 | if (p->minor > minor) | |
244 | break; | |
245 | minor++; | |
246 | } | |
247 | ||
248 | if (minor < capi_ttyminors) { | |
249 | mp->minor = minor; | |
250 | list_add(&mp->list, p->list.prev); | |
251 | } | |
252 | } | |
253 | write_unlock_irqrestore(&capiminor_list_lock, flags); | |
254 | ||
255 | if (!(minor < capi_ttyminors)) { | |
256 | printk(KERN_NOTICE "capi: out of minors\n"); | |
257 | kfree(mp); | |
258 | return NULL; | |
259 | } | |
260 | ||
261 | return mp; | |
262 | } | |
263 | ||
264 | static void capiminor_free(struct capiminor *mp) | |
265 | { | |
266 | unsigned long flags; | |
267 | ||
268 | write_lock_irqsave(&capiminor_list_lock, flags); | |
269 | list_del(&mp->list); | |
270 | write_unlock_irqrestore(&capiminor_list_lock, flags); | |
271 | ||
272 | if (mp->ttyskb) kfree_skb(mp->ttyskb); | |
273 | mp->ttyskb = NULL; | |
274 | skb_queue_purge(&mp->inqueue); | |
275 | skb_queue_purge(&mp->outqueue); | |
276 | capiminor_del_all_ack(mp); | |
277 | kfree(mp); | |
278 | } | |
279 | ||
408b664a | 280 | static struct capiminor *capiminor_find(unsigned int minor) |
1da177e4 LT |
281 | { |
282 | struct list_head *l; | |
283 | struct capiminor *p = NULL; | |
284 | ||
285 | read_lock(&capiminor_list_lock); | |
286 | list_for_each(l, &capiminor_list) { | |
287 | p = list_entry(l, struct capiminor, list); | |
288 | if (p->minor == minor) | |
289 | break; | |
290 | } | |
291 | read_unlock(&capiminor_list_lock); | |
292 | if (l == &capiminor_list) | |
293 | return NULL; | |
294 | ||
295 | return p; | |
296 | } | |
297 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
298 | ||
299 | /* -------- struct capincci ----------------------------------------- */ | |
300 | ||
301 | static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci) | |
302 | { | |
303 | struct capincci *np, **pp; | |
304 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
305 | struct capiminor *mp = NULL; | |
306 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
307 | ||
308 | np = kmalloc(sizeof(*np), GFP_ATOMIC); | |
309 | if (!np) | |
310 | return NULL; | |
311 | memset(np, 0, sizeof(struct capincci)); | |
312 | np->ncci = ncci; | |
313 | np->cdev = cdev; | |
314 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
315 | mp = NULL; | |
316 | if (cdev->userflags & CAPIFLAG_HIGHJACKING) | |
317 | mp = np->minorp = capiminor_alloc(&cdev->ap, ncci); | |
318 | if (mp) { | |
319 | mp->nccip = np; | |
320 | #ifdef _DEBUG_REFCOUNT | |
321 | printk(KERN_DEBUG "set mp->nccip\n"); | |
322 | #endif | |
323 | #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE) | |
324 | capifs_new_ncci(mp->minor, MKDEV(capi_ttymajor, mp->minor)); | |
325 | #endif | |
326 | } | |
327 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
328 | for (pp=&cdev->nccis; *pp; pp = &(*pp)->next) | |
329 | ; | |
330 | *pp = np; | |
331 | return np; | |
332 | } | |
333 | ||
334 | static void capincci_free(struct capidev *cdev, u32 ncci) | |
335 | { | |
336 | struct capincci *np, **pp; | |
337 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
338 | struct capiminor *mp; | |
339 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
340 | ||
341 | pp=&cdev->nccis; | |
342 | while (*pp) { | |
343 | np = *pp; | |
344 | if (ncci == 0xffffffff || np->ncci == ncci) { | |
345 | *pp = (*pp)->next; | |
346 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
347 | if ((mp = np->minorp) != 0) { | |
348 | #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE) | |
349 | capifs_free_ncci(mp->minor); | |
350 | #endif | |
351 | if (mp->tty) { | |
352 | mp->nccip = NULL; | |
353 | #ifdef _DEBUG_REFCOUNT | |
354 | printk(KERN_DEBUG "reset mp->nccip\n"); | |
355 | #endif | |
356 | tty_hangup(mp->tty); | |
357 | } else { | |
358 | capiminor_free(mp); | |
359 | } | |
360 | } | |
361 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
362 | kfree(np); | |
363 | if (*pp == 0) return; | |
364 | } else { | |
365 | pp = &(*pp)->next; | |
366 | } | |
367 | } | |
368 | } | |
369 | ||
370 | static struct capincci *capincci_find(struct capidev *cdev, u32 ncci) | |
371 | { | |
372 | struct capincci *p; | |
373 | ||
374 | for (p=cdev->nccis; p ; p = p->next) { | |
375 | if (p->ncci == ncci) | |
376 | break; | |
377 | } | |
378 | return p; | |
379 | } | |
380 | ||
381 | /* -------- struct capidev ------------------------------------------ */ | |
382 | ||
383 | static struct capidev *capidev_alloc(void) | |
384 | { | |
385 | struct capidev *cdev; | |
386 | unsigned long flags; | |
387 | ||
388 | cdev = kmalloc(sizeof(*cdev), GFP_KERNEL); | |
389 | if (!cdev) | |
390 | return NULL; | |
391 | memset(cdev, 0, sizeof(struct capidev)); | |
392 | ||
393 | init_MUTEX(&cdev->ncci_list_sem); | |
394 | skb_queue_head_init(&cdev->recvqueue); | |
395 | init_waitqueue_head(&cdev->recvwait); | |
396 | write_lock_irqsave(&capidev_list_lock, flags); | |
397 | list_add_tail(&cdev->list, &capidev_list); | |
398 | write_unlock_irqrestore(&capidev_list_lock, flags); | |
399 | return cdev; | |
400 | } | |
401 | ||
402 | static void capidev_free(struct capidev *cdev) | |
403 | { | |
404 | unsigned long flags; | |
405 | ||
406 | if (cdev->ap.applid) { | |
407 | capi20_release(&cdev->ap); | |
408 | cdev->ap.applid = 0; | |
409 | } | |
410 | skb_queue_purge(&cdev->recvqueue); | |
411 | ||
412 | down(&cdev->ncci_list_sem); | |
413 | capincci_free(cdev, 0xffffffff); | |
414 | up(&cdev->ncci_list_sem); | |
415 | ||
416 | write_lock_irqsave(&capidev_list_lock, flags); | |
417 | list_del(&cdev->list); | |
418 | write_unlock_irqrestore(&capidev_list_lock, flags); | |
419 | kfree(cdev); | |
420 | } | |
421 | ||
422 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
423 | /* -------- handle data queue --------------------------------------- */ | |
424 | ||
425 | static struct sk_buff * | |
426 | gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb) | |
427 | { | |
428 | struct sk_buff *nskb; | |
429 | nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_ATOMIC); | |
430 | if (nskb) { | |
431 | u16 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4+4+2); | |
432 | unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN); | |
433 | capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN); | |
434 | capimsg_setu16(s, 2, mp->ap->applid); | |
435 | capimsg_setu8 (s, 4, CAPI_DATA_B3); | |
436 | capimsg_setu8 (s, 5, CAPI_RESP); | |
437 | capimsg_setu16(s, 6, mp->msgid++); | |
438 | capimsg_setu32(s, 8, mp->ncci); | |
439 | capimsg_setu16(s, 12, datahandle); | |
440 | } | |
441 | return nskb; | |
442 | } | |
443 | ||
444 | static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb) | |
445 | { | |
446 | struct sk_buff *nskb; | |
447 | int datalen; | |
448 | u16 errcode, datahandle; | |
449 | struct tty_ldisc *ld; | |
450 | ||
451 | datalen = skb->len - CAPIMSG_LEN(skb->data); | |
452 | if (mp->tty == NULL) | |
453 | { | |
454 | #ifdef _DEBUG_DATAFLOW | |
455 | printk(KERN_DEBUG "capi: currently no receiver\n"); | |
456 | #endif | |
457 | return -1; | |
458 | } | |
459 | ||
460 | ld = tty_ldisc_ref(mp->tty); | |
461 | if (ld == NULL) | |
462 | return -1; | |
463 | if (ld->receive_buf == NULL) { | |
464 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) | |
465 | printk(KERN_DEBUG "capi: ldisc has no receive_buf function\n"); | |
466 | #endif | |
467 | goto bad; | |
468 | } | |
469 | if (mp->ttyinstop) { | |
470 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) | |
471 | printk(KERN_DEBUG "capi: recv tty throttled\n"); | |
472 | #endif | |
473 | goto bad; | |
474 | } | |
33f0f88f | 475 | if (mp->tty->receive_room < datalen) { |
1da177e4 LT |
476 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) |
477 | printk(KERN_DEBUG "capi: no room in tty\n"); | |
478 | #endif | |
479 | goto bad; | |
480 | } | |
481 | if ((nskb = gen_data_b3_resp_for(mp, skb)) == 0) { | |
482 | printk(KERN_ERR "capi: gen_data_b3_resp failed\n"); | |
483 | goto bad; | |
484 | } | |
485 | datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4); | |
486 | errcode = capi20_put_message(mp->ap, nskb); | |
487 | if (errcode != CAPI_NOERROR) { | |
488 | printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n", | |
489 | errcode); | |
490 | kfree_skb(nskb); | |
491 | goto bad; | |
492 | } | |
493 | (void)skb_pull(skb, CAPIMSG_LEN(skb->data)); | |
494 | #ifdef _DEBUG_DATAFLOW | |
495 | printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldisc\n", | |
496 | datahandle, skb->len); | |
497 | #endif | |
498 | ld->receive_buf(mp->tty, skb->data, NULL, skb->len); | |
499 | kfree_skb(skb); | |
500 | tty_ldisc_deref(ld); | |
501 | return 0; | |
502 | bad: | |
503 | tty_ldisc_deref(ld); | |
504 | return -1; | |
505 | } | |
506 | ||
507 | static void handle_minor_recv(struct capiminor *mp) | |
508 | { | |
509 | struct sk_buff *skb; | |
510 | while ((skb = skb_dequeue(&mp->inqueue)) != 0) { | |
511 | unsigned int len = skb->len; | |
512 | mp->inbytes -= len; | |
513 | if (handle_recv_skb(mp, skb) < 0) { | |
514 | skb_queue_head(&mp->inqueue, skb); | |
515 | mp->inbytes += len; | |
516 | return; | |
517 | } | |
518 | } | |
519 | } | |
520 | ||
521 | static int handle_minor_send(struct capiminor *mp) | |
522 | { | |
523 | struct sk_buff *skb; | |
524 | u16 len; | |
525 | int count = 0; | |
526 | u16 errcode; | |
527 | u16 datahandle; | |
528 | ||
529 | if (mp->tty && mp->ttyoutstop) { | |
530 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) | |
531 | printk(KERN_DEBUG "capi: send: tty stopped\n"); | |
532 | #endif | |
533 | return 0; | |
534 | } | |
535 | ||
536 | while ((skb = skb_dequeue(&mp->outqueue)) != 0) { | |
537 | datahandle = mp->datahandle; | |
538 | len = (u16)skb->len; | |
539 | skb_push(skb, CAPI_DATA_B3_REQ_LEN); | |
540 | memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN); | |
541 | capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN); | |
542 | capimsg_setu16(skb->data, 2, mp->ap->applid); | |
543 | capimsg_setu8 (skb->data, 4, CAPI_DATA_B3); | |
544 | capimsg_setu8 (skb->data, 5, CAPI_REQ); | |
545 | capimsg_setu16(skb->data, 6, mp->msgid++); | |
546 | capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */ | |
547 | capimsg_setu32(skb->data, 12, (u32) skb->data); /* Data32 */ | |
548 | capimsg_setu16(skb->data, 16, len); /* Data length */ | |
549 | capimsg_setu16(skb->data, 18, datahandle); | |
550 | capimsg_setu16(skb->data, 20, 0); /* Flags */ | |
551 | ||
552 | if (capincci_add_ack(mp, datahandle) < 0) { | |
553 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); | |
554 | skb_queue_head(&mp->outqueue, skb); | |
555 | return count; | |
556 | } | |
557 | errcode = capi20_put_message(mp->ap, skb); | |
558 | if (errcode == CAPI_NOERROR) { | |
559 | mp->datahandle++; | |
560 | count++; | |
561 | mp->outbytes -= len; | |
562 | #ifdef _DEBUG_DATAFLOW | |
563 | printk(KERN_DEBUG "capi: DATA_B3_REQ %u len=%u\n", | |
564 | datahandle, len); | |
565 | #endif | |
566 | continue; | |
567 | } | |
568 | capiminor_del_ack(mp, datahandle); | |
569 | ||
570 | if (errcode == CAPI_SENDQUEUEFULL) { | |
571 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); | |
572 | skb_queue_head(&mp->outqueue, skb); | |
573 | break; | |
574 | } | |
575 | ||
576 | /* ups, drop packet */ | |
577 | printk(KERN_ERR "capi: put_message = %x\n", errcode); | |
578 | mp->outbytes -= len; | |
579 | kfree_skb(skb); | |
580 | } | |
581 | return count; | |
582 | } | |
583 | ||
584 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
585 | /* -------- function called by lower level -------------------------- */ | |
586 | ||
587 | static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb) | |
588 | { | |
589 | struct capidev *cdev = ap->private; | |
590 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
591 | struct capiminor *mp; | |
592 | u16 datahandle; | |
593 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
594 | struct capincci *np; | |
595 | u32 ncci; | |
596 | ||
597 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) { | |
598 | u16 info = CAPIMSG_U16(skb->data, 12); // Info field | |
599 | if (info == 0) { | |
600 | down(&cdev->ncci_list_sem); | |
601 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); | |
602 | up(&cdev->ncci_list_sem); | |
603 | } | |
604 | } | |
605 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) { | |
606 | down(&cdev->ncci_list_sem); | |
607 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); | |
608 | up(&cdev->ncci_list_sem); | |
609 | } | |
610 | if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) { | |
611 | skb_queue_tail(&cdev->recvqueue, skb); | |
612 | wake_up_interruptible(&cdev->recvwait); | |
613 | return; | |
614 | } | |
615 | ncci = CAPIMSG_CONTROL(skb->data); | |
616 | for (np = cdev->nccis; np && np->ncci != ncci; np = np->next) | |
617 | ; | |
618 | if (!np) { | |
619 | printk(KERN_ERR "BUG: capi_signal: ncci not found\n"); | |
620 | skb_queue_tail(&cdev->recvqueue, skb); | |
621 | wake_up_interruptible(&cdev->recvwait); | |
622 | return; | |
623 | } | |
624 | #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE | |
625 | skb_queue_tail(&cdev->recvqueue, skb); | |
626 | wake_up_interruptible(&cdev->recvwait); | |
627 | #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
628 | mp = np->minorp; | |
629 | if (!mp) { | |
630 | skb_queue_tail(&cdev->recvqueue, skb); | |
631 | wake_up_interruptible(&cdev->recvwait); | |
632 | return; | |
633 | } | |
634 | ||
635 | ||
636 | if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) { | |
637 | ||
638 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+4+2); | |
639 | #ifdef _DEBUG_DATAFLOW | |
640 | printk(KERN_DEBUG "capi_signal: DATA_B3_IND %u len=%d\n", | |
641 | datahandle, skb->len-CAPIMSG_LEN(skb->data)); | |
642 | #endif | |
643 | skb_queue_tail(&mp->inqueue, skb); | |
644 | mp->inbytes += skb->len; | |
645 | handle_minor_recv(mp); | |
646 | ||
647 | } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) { | |
648 | ||
649 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4); | |
650 | #ifdef _DEBUG_DATAFLOW | |
651 | printk(KERN_DEBUG "capi_signal: DATA_B3_CONF %u 0x%x\n", | |
652 | datahandle, | |
653 | CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+2)); | |
654 | #endif | |
655 | kfree_skb(skb); | |
656 | (void)capiminor_del_ack(mp, datahandle); | |
657 | if (mp->tty) | |
658 | tty_wakeup(mp->tty); | |
659 | (void)handle_minor_send(mp); | |
660 | ||
661 | } else { | |
662 | /* ups, let capi application handle it :-) */ | |
663 | skb_queue_tail(&cdev->recvqueue, skb); | |
664 | wake_up_interruptible(&cdev->recvwait); | |
665 | } | |
666 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
667 | } | |
668 | ||
669 | /* -------- file_operations for capidev ----------------------------- */ | |
670 | ||
671 | static ssize_t | |
672 | capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
673 | { | |
674 | struct capidev *cdev = (struct capidev *)file->private_data; | |
675 | struct sk_buff *skb; | |
676 | size_t copied; | |
677 | ||
678 | if (!cdev->ap.applid) | |
679 | return -ENODEV; | |
680 | ||
681 | if ((skb = skb_dequeue(&cdev->recvqueue)) == 0) { | |
682 | ||
683 | if (file->f_flags & O_NONBLOCK) | |
684 | return -EAGAIN; | |
685 | ||
686 | for (;;) { | |
687 | interruptible_sleep_on(&cdev->recvwait); | |
688 | if ((skb = skb_dequeue(&cdev->recvqueue)) != 0) | |
689 | break; | |
690 | if (signal_pending(current)) | |
691 | break; | |
692 | } | |
693 | if (skb == 0) | |
694 | return -ERESTARTNOHAND; | |
695 | } | |
696 | if (skb->len > count) { | |
697 | skb_queue_head(&cdev->recvqueue, skb); | |
698 | return -EMSGSIZE; | |
699 | } | |
700 | if (copy_to_user(buf, skb->data, skb->len)) { | |
701 | skb_queue_head(&cdev->recvqueue, skb); | |
702 | return -EFAULT; | |
703 | } | |
704 | copied = skb->len; | |
705 | ||
706 | kfree_skb(skb); | |
707 | ||
708 | return copied; | |
709 | } | |
710 | ||
711 | static ssize_t | |
712 | capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
713 | { | |
714 | struct capidev *cdev = (struct capidev *)file->private_data; | |
715 | struct sk_buff *skb; | |
716 | u16 mlen; | |
717 | ||
718 | if (!cdev->ap.applid) | |
719 | return -ENODEV; | |
720 | ||
721 | skb = alloc_skb(count, GFP_USER); | |
722 | if (!skb) | |
723 | return -ENOMEM; | |
724 | ||
725 | if (copy_from_user(skb_put(skb, count), buf, count)) { | |
726 | kfree_skb(skb); | |
727 | return -EFAULT; | |
728 | } | |
729 | mlen = CAPIMSG_LEN(skb->data); | |
730 | if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) { | |
731 | if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) { | |
732 | kfree_skb(skb); | |
733 | return -EINVAL; | |
734 | } | |
735 | } else { | |
736 | if (mlen != count) { | |
737 | kfree_skb(skb); | |
738 | return -EINVAL; | |
739 | } | |
740 | } | |
741 | CAPIMSG_SETAPPID(skb->data, cdev->ap.applid); | |
742 | ||
743 | if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) { | |
744 | down(&cdev->ncci_list_sem); | |
745 | capincci_free(cdev, CAPIMSG_NCCI(skb->data)); | |
746 | up(&cdev->ncci_list_sem); | |
747 | } | |
748 | ||
749 | cdev->errcode = capi20_put_message(&cdev->ap, skb); | |
750 | ||
751 | if (cdev->errcode) { | |
752 | kfree_skb(skb); | |
753 | return -EIO; | |
754 | } | |
755 | return count; | |
756 | } | |
757 | ||
758 | static unsigned int | |
759 | capi_poll(struct file *file, poll_table * wait) | |
760 | { | |
761 | struct capidev *cdev = (struct capidev *)file->private_data; | |
762 | unsigned int mask = 0; | |
763 | ||
764 | if (!cdev->ap.applid) | |
765 | return POLLERR; | |
766 | ||
767 | poll_wait(file, &(cdev->recvwait), wait); | |
768 | mask = POLLOUT | POLLWRNORM; | |
769 | if (!skb_queue_empty(&cdev->recvqueue)) | |
770 | mask |= POLLIN | POLLRDNORM; | |
771 | return mask; | |
772 | } | |
773 | ||
774 | static int | |
775 | capi_ioctl(struct inode *inode, struct file *file, | |
776 | unsigned int cmd, unsigned long arg) | |
777 | { | |
778 | struct capidev *cdev = file->private_data; | |
779 | struct capi20_appl *ap = &cdev->ap; | |
780 | capi_ioctl_struct data; | |
781 | int retval = -EINVAL; | |
782 | void __user *argp = (void __user *)arg; | |
783 | ||
784 | switch (cmd) { | |
785 | case CAPI_REGISTER: | |
786 | { | |
787 | if (ap->applid) | |
788 | return -EEXIST; | |
789 | ||
790 | if (copy_from_user(&cdev->ap.rparam, argp, | |
791 | sizeof(struct capi_register_params))) | |
792 | return -EFAULT; | |
793 | ||
794 | cdev->ap.private = cdev; | |
795 | cdev->ap.recv_message = capi_recv_message; | |
796 | cdev->errcode = capi20_register(ap); | |
797 | if (cdev->errcode) { | |
798 | ap->applid = 0; | |
799 | return -EIO; | |
800 | } | |
801 | } | |
802 | return (int)ap->applid; | |
803 | ||
804 | case CAPI_GET_VERSION: | |
805 | { | |
806 | if (copy_from_user(&data.contr, argp, | |
807 | sizeof(data.contr))) | |
808 | return -EFAULT; | |
809 | cdev->errcode = capi20_get_version(data.contr, &data.version); | |
810 | if (cdev->errcode) | |
811 | return -EIO; | |
812 | if (copy_to_user(argp, &data.version, | |
813 | sizeof(data.version))) | |
814 | return -EFAULT; | |
815 | } | |
816 | return 0; | |
817 | ||
818 | case CAPI_GET_SERIAL: | |
819 | { | |
820 | if (copy_from_user(&data.contr, argp, | |
821 | sizeof(data.contr))) | |
822 | return -EFAULT; | |
823 | cdev->errcode = capi20_get_serial (data.contr, data.serial); | |
824 | if (cdev->errcode) | |
825 | return -EIO; | |
826 | if (copy_to_user(argp, data.serial, | |
827 | sizeof(data.serial))) | |
828 | return -EFAULT; | |
829 | } | |
830 | return 0; | |
831 | case CAPI_GET_PROFILE: | |
832 | { | |
833 | if (copy_from_user(&data.contr, argp, | |
834 | sizeof(data.contr))) | |
835 | return -EFAULT; | |
836 | ||
837 | if (data.contr == 0) { | |
838 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); | |
839 | if (cdev->errcode) | |
840 | return -EIO; | |
841 | ||
842 | retval = copy_to_user(argp, | |
843 | &data.profile.ncontroller, | |
844 | sizeof(data.profile.ncontroller)); | |
845 | ||
846 | } else { | |
847 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); | |
848 | if (cdev->errcode) | |
849 | return -EIO; | |
850 | ||
851 | retval = copy_to_user(argp, &data.profile, | |
852 | sizeof(data.profile)); | |
853 | } | |
854 | if (retval) | |
855 | return -EFAULT; | |
856 | } | |
857 | return 0; | |
858 | ||
859 | case CAPI_GET_MANUFACTURER: | |
860 | { | |
861 | if (copy_from_user(&data.contr, argp, | |
862 | sizeof(data.contr))) | |
863 | return -EFAULT; | |
864 | cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer); | |
865 | if (cdev->errcode) | |
866 | return -EIO; | |
867 | ||
868 | if (copy_to_user(argp, data.manufacturer, | |
869 | sizeof(data.manufacturer))) | |
870 | return -EFAULT; | |
871 | ||
872 | } | |
873 | return 0; | |
874 | case CAPI_GET_ERRCODE: | |
875 | data.errcode = cdev->errcode; | |
876 | cdev->errcode = CAPI_NOERROR; | |
877 | if (arg) { | |
878 | if (copy_to_user(argp, &data.errcode, | |
879 | sizeof(data.errcode))) | |
880 | return -EFAULT; | |
881 | } | |
882 | return data.errcode; | |
883 | ||
884 | case CAPI_INSTALLED: | |
885 | if (capi20_isinstalled() == CAPI_NOERROR) | |
886 | return 0; | |
887 | return -ENXIO; | |
888 | ||
889 | case CAPI_MANUFACTURER_CMD: | |
890 | { | |
891 | struct capi_manufacturer_cmd mcmd; | |
892 | if (!capable(CAP_SYS_ADMIN)) | |
893 | return -EPERM; | |
894 | if (copy_from_user(&mcmd, argp, sizeof(mcmd))) | |
895 | return -EFAULT; | |
896 | return capi20_manufacturer(mcmd.cmd, mcmd.data); | |
897 | } | |
898 | return 0; | |
899 | ||
900 | case CAPI_SET_FLAGS: | |
901 | case CAPI_CLR_FLAGS: | |
902 | { | |
903 | unsigned userflags; | |
904 | if (copy_from_user(&userflags, argp, | |
905 | sizeof(userflags))) | |
906 | return -EFAULT; | |
907 | if (cmd == CAPI_SET_FLAGS) | |
908 | cdev->userflags |= userflags; | |
909 | else | |
910 | cdev->userflags &= ~userflags; | |
911 | } | |
912 | return 0; | |
913 | ||
914 | case CAPI_GET_FLAGS: | |
915 | if (copy_to_user(argp, &cdev->userflags, | |
916 | sizeof(cdev->userflags))) | |
917 | return -EFAULT; | |
918 | return 0; | |
919 | ||
920 | case CAPI_NCCI_OPENCOUNT: | |
921 | { | |
922 | struct capincci *nccip; | |
923 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
924 | struct capiminor *mp; | |
925 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
926 | unsigned ncci; | |
927 | int count = 0; | |
928 | if (copy_from_user(&ncci, argp, sizeof(ncci))) | |
929 | return -EFAULT; | |
930 | ||
931 | down(&cdev->ncci_list_sem); | |
932 | if ((nccip = capincci_find(cdev, (u32) ncci)) == 0) { | |
933 | up(&cdev->ncci_list_sem); | |
934 | return 0; | |
935 | } | |
936 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
937 | if ((mp = nccip->minorp) != 0) { | |
938 | count += atomic_read(&mp->ttyopencount); | |
939 | } | |
940 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
941 | up(&cdev->ncci_list_sem); | |
942 | return count; | |
943 | } | |
944 | return 0; | |
945 | ||
946 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
947 | case CAPI_NCCI_GETUNIT: | |
948 | { | |
949 | struct capincci *nccip; | |
950 | struct capiminor *mp; | |
951 | unsigned ncci; | |
952 | int unit = 0; | |
953 | if (copy_from_user(&ncci, argp, | |
954 | sizeof(ncci))) | |
955 | return -EFAULT; | |
956 | down(&cdev->ncci_list_sem); | |
957 | nccip = capincci_find(cdev, (u32) ncci); | |
958 | if (!nccip || (mp = nccip->minorp) == 0) { | |
959 | up(&cdev->ncci_list_sem); | |
960 | return -ESRCH; | |
961 | } | |
962 | unit = mp->minor; | |
963 | up(&cdev->ncci_list_sem); | |
964 | return unit; | |
965 | } | |
966 | return 0; | |
967 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
968 | } | |
969 | return -EINVAL; | |
970 | } | |
971 | ||
972 | static int | |
973 | capi_open(struct inode *inode, struct file *file) | |
974 | { | |
975 | if (file->private_data) | |
976 | return -EEXIST; | |
977 | ||
978 | if ((file->private_data = capidev_alloc()) == 0) | |
979 | return -ENOMEM; | |
980 | ||
981 | return nonseekable_open(inode, file); | |
982 | } | |
983 | ||
984 | static int | |
985 | capi_release(struct inode *inode, struct file *file) | |
986 | { | |
987 | struct capidev *cdev = (struct capidev *)file->private_data; | |
988 | ||
989 | capidev_free(cdev); | |
990 | file->private_data = NULL; | |
991 | ||
992 | return 0; | |
993 | } | |
994 | ||
995 | static struct file_operations capi_fops = | |
996 | { | |
997 | .owner = THIS_MODULE, | |
998 | .llseek = no_llseek, | |
999 | .read = capi_read, | |
1000 | .write = capi_write, | |
1001 | .poll = capi_poll, | |
1002 | .ioctl = capi_ioctl, | |
1003 | .open = capi_open, | |
1004 | .release = capi_release, | |
1005 | }; | |
1006 | ||
1007 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
1008 | /* -------- tty_operations for capincci ----------------------------- */ | |
1009 | ||
1010 | static int capinc_tty_open(struct tty_struct * tty, struct file * file) | |
1011 | { | |
1012 | struct capiminor *mp; | |
1013 | ||
1014 | if ((mp = capiminor_find(iminor(file->f_dentry->d_inode))) == 0) | |
1015 | return -ENXIO; | |
1016 | if (mp->nccip == 0) | |
1017 | return -ENXIO; | |
1018 | ||
1019 | tty->driver_data = (void *)mp; | |
1020 | ||
1021 | if (atomic_read(&mp->ttyopencount) == 0) | |
1022 | mp->tty = tty; | |
1023 | atomic_inc(&mp->ttyopencount); | |
1024 | #ifdef _DEBUG_REFCOUNT | |
1025 | printk(KERN_DEBUG "capinc_tty_open ocount=%d\n", atomic_read(&mp->ttyopencount)); | |
1026 | #endif | |
1027 | handle_minor_recv(mp); | |
1028 | return 0; | |
1029 | } | |
1030 | ||
1031 | static void capinc_tty_close(struct tty_struct * tty, struct file * file) | |
1032 | { | |
1033 | struct capiminor *mp; | |
1034 | ||
1035 | mp = (struct capiminor *)tty->driver_data; | |
1036 | if (mp) { | |
1037 | if (atomic_dec_and_test(&mp->ttyopencount)) { | |
1038 | #ifdef _DEBUG_REFCOUNT | |
1039 | printk(KERN_DEBUG "capinc_tty_close lastclose\n"); | |
1040 | #endif | |
1041 | tty->driver_data = NULL; | |
1042 | mp->tty = NULL; | |
1043 | } | |
1044 | #ifdef _DEBUG_REFCOUNT | |
1045 | printk(KERN_DEBUG "capinc_tty_close ocount=%d\n", atomic_read(&mp->ttyopencount)); | |
1046 | #endif | |
1047 | if (mp->nccip == 0) | |
1048 | capiminor_free(mp); | |
1049 | } | |
1050 | ||
1051 | #ifdef _DEBUG_REFCOUNT | |
1052 | printk(KERN_DEBUG "capinc_tty_close\n"); | |
1053 | #endif | |
1054 | } | |
1055 | ||
1056 | static int capinc_tty_write(struct tty_struct * tty, | |
1057 | const unsigned char *buf, int count) | |
1058 | { | |
1059 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1060 | struct sk_buff *skb; | |
1061 | ||
1062 | #ifdef _DEBUG_TTYFUNCS | |
1063 | printk(KERN_DEBUG "capinc_tty_write(count=%d)\n", count); | |
1064 | #endif | |
1065 | ||
1066 | if (!mp || !mp->nccip) { | |
1067 | #ifdef _DEBUG_TTYFUNCS | |
1068 | printk(KERN_DEBUG "capinc_tty_write: mp or mp->ncci NULL\n"); | |
1069 | #endif | |
1070 | return 0; | |
1071 | } | |
1072 | ||
1073 | skb = mp->ttyskb; | |
1074 | if (skb) { | |
1075 | mp->ttyskb = NULL; | |
1076 | skb_queue_tail(&mp->outqueue, skb); | |
1077 | mp->outbytes += skb->len; | |
1078 | } | |
1079 | ||
1080 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC); | |
1081 | if (!skb) { | |
1082 | printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n"); | |
1083 | return -ENOMEM; | |
1084 | } | |
1085 | ||
1086 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); | |
1087 | memcpy(skb_put(skb, count), buf, count); | |
1088 | ||
1089 | skb_queue_tail(&mp->outqueue, skb); | |
1090 | mp->outbytes += skb->len; | |
1091 | (void)handle_minor_send(mp); | |
1092 | (void)handle_minor_recv(mp); | |
1093 | return count; | |
1094 | } | |
1095 | ||
1096 | static void capinc_tty_put_char(struct tty_struct *tty, unsigned char ch) | |
1097 | { | |
1098 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1099 | struct sk_buff *skb; | |
1100 | ||
1101 | #ifdef _DEBUG_TTYFUNCS | |
1102 | printk(KERN_DEBUG "capinc_put_char(%u)\n", ch); | |
1103 | #endif | |
1104 | ||
1105 | if (!mp || !mp->nccip) { | |
1106 | #ifdef _DEBUG_TTYFUNCS | |
1107 | printk(KERN_DEBUG "capinc_tty_put_char: mp or mp->ncci NULL\n"); | |
1108 | #endif | |
1109 | return; | |
1110 | } | |
1111 | ||
1112 | skb = mp->ttyskb; | |
1113 | if (skb) { | |
1114 | if (skb_tailroom(skb) > 0) { | |
1115 | *(skb_put(skb, 1)) = ch; | |
1116 | return; | |
1117 | } | |
1118 | mp->ttyskb = NULL; | |
1119 | skb_queue_tail(&mp->outqueue, skb); | |
1120 | mp->outbytes += skb->len; | |
1121 | (void)handle_minor_send(mp); | |
1122 | } | |
1123 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+CAPI_MAX_BLKSIZE, GFP_ATOMIC); | |
1124 | if (skb) { | |
1125 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); | |
1126 | *(skb_put(skb, 1)) = ch; | |
1127 | mp->ttyskb = skb; | |
1128 | } else { | |
1129 | printk(KERN_ERR "capinc_put_char: char %u lost\n", ch); | |
1130 | } | |
1131 | } | |
1132 | ||
1133 | static void capinc_tty_flush_chars(struct tty_struct *tty) | |
1134 | { | |
1135 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1136 | struct sk_buff *skb; | |
1137 | ||
1138 | #ifdef _DEBUG_TTYFUNCS | |
1139 | printk(KERN_DEBUG "capinc_tty_flush_chars\n"); | |
1140 | #endif | |
1141 | ||
1142 | if (!mp || !mp->nccip) { | |
1143 | #ifdef _DEBUG_TTYFUNCS | |
1144 | printk(KERN_DEBUG "capinc_tty_flush_chars: mp or mp->ncci NULL\n"); | |
1145 | #endif | |
1146 | return; | |
1147 | } | |
1148 | ||
1149 | skb = mp->ttyskb; | |
1150 | if (skb) { | |
1151 | mp->ttyskb = NULL; | |
1152 | skb_queue_tail(&mp->outqueue, skb); | |
1153 | mp->outbytes += skb->len; | |
1154 | (void)handle_minor_send(mp); | |
1155 | } | |
1156 | (void)handle_minor_recv(mp); | |
1157 | } | |
1158 | ||
1159 | static int capinc_tty_write_room(struct tty_struct *tty) | |
1160 | { | |
1161 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1162 | int room; | |
1163 | if (!mp || !mp->nccip) { | |
1164 | #ifdef _DEBUG_TTYFUNCS | |
1165 | printk(KERN_DEBUG "capinc_tty_write_room: mp or mp->ncci NULL\n"); | |
1166 | #endif | |
1167 | return 0; | |
1168 | } | |
1169 | room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue); | |
1170 | room *= CAPI_MAX_BLKSIZE; | |
1171 | #ifdef _DEBUG_TTYFUNCS | |
1172 | printk(KERN_DEBUG "capinc_tty_write_room = %d\n", room); | |
1173 | #endif | |
1174 | return room; | |
1175 | } | |
1176 | ||
408b664a | 1177 | static int capinc_tty_chars_in_buffer(struct tty_struct *tty) |
1da177e4 LT |
1178 | { |
1179 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1180 | if (!mp || !mp->nccip) { | |
1181 | #ifdef _DEBUG_TTYFUNCS | |
1182 | printk(KERN_DEBUG "capinc_tty_chars_in_buffer: mp or mp->ncci NULL\n"); | |
1183 | #endif | |
1184 | return 0; | |
1185 | } | |
1186 | #ifdef _DEBUG_TTYFUNCS | |
1187 | printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n", | |
1188 | mp->outbytes, mp->nack, | |
1189 | skb_queue_len(&mp->outqueue), | |
1190 | skb_queue_len(&mp->inqueue)); | |
1191 | #endif | |
1192 | return mp->outbytes; | |
1193 | } | |
1194 | ||
1195 | static int capinc_tty_ioctl(struct tty_struct *tty, struct file * file, | |
1196 | unsigned int cmd, unsigned long arg) | |
1197 | { | |
1198 | int error = 0; | |
1199 | switch (cmd) { | |
1200 | default: | |
1201 | error = n_tty_ioctl (tty, file, cmd, arg); | |
1202 | break; | |
1203 | } | |
1204 | return error; | |
1205 | } | |
1206 | ||
1207 | static void capinc_tty_set_termios(struct tty_struct *tty, struct termios * old) | |
1208 | { | |
1209 | #ifdef _DEBUG_TTYFUNCS | |
1210 | printk(KERN_DEBUG "capinc_tty_set_termios\n"); | |
1211 | #endif | |
1212 | } | |
1213 | ||
1214 | static void capinc_tty_throttle(struct tty_struct * tty) | |
1215 | { | |
1216 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1217 | #ifdef _DEBUG_TTYFUNCS | |
1218 | printk(KERN_DEBUG "capinc_tty_throttle\n"); | |
1219 | #endif | |
1220 | if (mp) | |
1221 | mp->ttyinstop = 1; | |
1222 | } | |
1223 | ||
1224 | static void capinc_tty_unthrottle(struct tty_struct * tty) | |
1225 | { | |
1226 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1227 | #ifdef _DEBUG_TTYFUNCS | |
1228 | printk(KERN_DEBUG "capinc_tty_unthrottle\n"); | |
1229 | #endif | |
1230 | if (mp) { | |
1231 | mp->ttyinstop = 0; | |
1232 | handle_minor_recv(mp); | |
1233 | } | |
1234 | } | |
1235 | ||
1236 | static void capinc_tty_stop(struct tty_struct *tty) | |
1237 | { | |
1238 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1239 | #ifdef _DEBUG_TTYFUNCS | |
1240 | printk(KERN_DEBUG "capinc_tty_stop\n"); | |
1241 | #endif | |
1242 | if (mp) { | |
1243 | mp->ttyoutstop = 1; | |
1244 | } | |
1245 | } | |
1246 | ||
1247 | static void capinc_tty_start(struct tty_struct *tty) | |
1248 | { | |
1249 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1250 | #ifdef _DEBUG_TTYFUNCS | |
1251 | printk(KERN_DEBUG "capinc_tty_start\n"); | |
1252 | #endif | |
1253 | if (mp) { | |
1254 | mp->ttyoutstop = 0; | |
1255 | (void)handle_minor_send(mp); | |
1256 | } | |
1257 | } | |
1258 | ||
1259 | static void capinc_tty_hangup(struct tty_struct *tty) | |
1260 | { | |
1261 | #ifdef _DEBUG_TTYFUNCS | |
1262 | printk(KERN_DEBUG "capinc_tty_hangup\n"); | |
1263 | #endif | |
1264 | } | |
1265 | ||
1266 | static void capinc_tty_break_ctl(struct tty_struct *tty, int state) | |
1267 | { | |
1268 | #ifdef _DEBUG_TTYFUNCS | |
1269 | printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state); | |
1270 | #endif | |
1271 | } | |
1272 | ||
1273 | static void capinc_tty_flush_buffer(struct tty_struct *tty) | |
1274 | { | |
1275 | #ifdef _DEBUG_TTYFUNCS | |
1276 | printk(KERN_DEBUG "capinc_tty_flush_buffer\n"); | |
1277 | #endif | |
1278 | } | |
1279 | ||
1280 | static void capinc_tty_set_ldisc(struct tty_struct *tty) | |
1281 | { | |
1282 | #ifdef _DEBUG_TTYFUNCS | |
1283 | printk(KERN_DEBUG "capinc_tty_set_ldisc\n"); | |
1284 | #endif | |
1285 | } | |
1286 | ||
1287 | static void capinc_tty_send_xchar(struct tty_struct *tty, char ch) | |
1288 | { | |
1289 | #ifdef _DEBUG_TTYFUNCS | |
1290 | printk(KERN_DEBUG "capinc_tty_send_xchar(%d)\n", ch); | |
1291 | #endif | |
1292 | } | |
1293 | ||
1294 | static int capinc_tty_read_proc(char *page, char **start, off_t off, | |
1295 | int count, int *eof, void *data) | |
1296 | { | |
1297 | return 0; | |
1298 | } | |
1299 | ||
1300 | static struct tty_driver *capinc_tty_driver; | |
1301 | ||
1302 | static struct tty_operations capinc_ops = { | |
1303 | .open = capinc_tty_open, | |
1304 | .close = capinc_tty_close, | |
1305 | .write = capinc_tty_write, | |
1306 | .put_char = capinc_tty_put_char, | |
1307 | .flush_chars = capinc_tty_flush_chars, | |
1308 | .write_room = capinc_tty_write_room, | |
1309 | .chars_in_buffer = capinc_tty_chars_in_buffer, | |
1310 | .ioctl = capinc_tty_ioctl, | |
1311 | .set_termios = capinc_tty_set_termios, | |
1312 | .throttle = capinc_tty_throttle, | |
1313 | .unthrottle = capinc_tty_unthrottle, | |
1314 | .stop = capinc_tty_stop, | |
1315 | .start = capinc_tty_start, | |
1316 | .hangup = capinc_tty_hangup, | |
1317 | .break_ctl = capinc_tty_break_ctl, | |
1318 | .flush_buffer = capinc_tty_flush_buffer, | |
1319 | .set_ldisc = capinc_tty_set_ldisc, | |
1320 | .send_xchar = capinc_tty_send_xchar, | |
1321 | .read_proc = capinc_tty_read_proc, | |
1322 | }; | |
1323 | ||
1324 | static int capinc_tty_init(void) | |
1325 | { | |
1326 | struct tty_driver *drv; | |
1327 | ||
1328 | if (capi_ttyminors > CAPINC_MAX_PORTS) | |
1329 | capi_ttyminors = CAPINC_MAX_PORTS; | |
1330 | if (capi_ttyminors <= 0) | |
1331 | capi_ttyminors = CAPINC_NR_PORTS; | |
1332 | ||
1333 | drv = alloc_tty_driver(capi_ttyminors); | |
1334 | if (!drv) | |
1335 | return -ENOMEM; | |
1336 | ||
1337 | drv->owner = THIS_MODULE; | |
1338 | drv->driver_name = "capi_nc"; | |
1339 | drv->devfs_name = "capi/"; | |
1340 | drv->name = "capi"; | |
1341 | drv->major = capi_ttymajor; | |
1342 | drv->minor_start = 0; | |
1343 | drv->type = TTY_DRIVER_TYPE_SERIAL; | |
1344 | drv->subtype = SERIAL_TYPE_NORMAL; | |
1345 | drv->init_termios = tty_std_termios; | |
1346 | drv->init_termios.c_iflag = ICRNL; | |
1347 | drv->init_termios.c_oflag = OPOST | ONLCR; | |
1348 | drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
1349 | drv->init_termios.c_lflag = 0; | |
1350 | drv->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_RESET_TERMIOS; | |
1351 | tty_set_operations(drv, &capinc_ops); | |
1352 | if (tty_register_driver(drv)) { | |
1353 | put_tty_driver(drv); | |
1354 | printk(KERN_ERR "Couldn't register capi_nc driver\n"); | |
1355 | return -1; | |
1356 | } | |
1357 | capinc_tty_driver = drv; | |
1358 | return 0; | |
1359 | } | |
1360 | ||
1361 | static void capinc_tty_exit(void) | |
1362 | { | |
1363 | struct tty_driver *drv = capinc_tty_driver; | |
1364 | int retval; | |
1365 | if ((retval = tty_unregister_driver(drv))) | |
1366 | printk(KERN_ERR "capi: failed to unregister capi_nc driver (%d)\n", retval); | |
1367 | put_tty_driver(drv); | |
1368 | } | |
1369 | ||
1370 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
1371 | ||
1372 | /* -------- /proc functions ----------------------------------------- */ | |
1373 | ||
1374 | /* | |
1375 | * /proc/capi/capi20: | |
1376 | * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt | |
1377 | */ | |
1378 | static int proc_capidev_read_proc(char *page, char **start, off_t off, | |
1379 | int count, int *eof, void *data) | |
1380 | { | |
1381 | struct capidev *cdev; | |
1382 | struct list_head *l; | |
1383 | int len = 0; | |
1384 | ||
1385 | read_lock(&capidev_list_lock); | |
1386 | list_for_each(l, &capidev_list) { | |
1387 | cdev = list_entry(l, struct capidev, list); | |
1388 | len += sprintf(page+len, "0 %d %lu %lu %lu %lu\n", | |
1389 | cdev->ap.applid, | |
1390 | cdev->ap.nrecvctlpkt, | |
1391 | cdev->ap.nrecvdatapkt, | |
1392 | cdev->ap.nsentctlpkt, | |
1393 | cdev->ap.nsentdatapkt); | |
1394 | if (len <= off) { | |
1395 | off -= len; | |
1396 | len = 0; | |
1397 | } else { | |
1398 | if (len-off > count) | |
1399 | goto endloop; | |
1400 | } | |
1401 | } | |
1402 | ||
1403 | endloop: | |
1404 | read_unlock(&capidev_list_lock); | |
1405 | if (len < count) | |
1406 | *eof = 1; | |
1407 | if (len > count) len = count; | |
1408 | if (len < 0) len = 0; | |
1409 | return len; | |
1410 | } | |
1411 | ||
1412 | /* | |
1413 | * /proc/capi/capi20ncci: | |
1414 | * applid ncci | |
1415 | */ | |
1416 | static int proc_capincci_read_proc(char *page, char **start, off_t off, | |
1417 | int count, int *eof, void *data) | |
1418 | { | |
1419 | struct capidev *cdev; | |
1420 | struct capincci *np; | |
1421 | struct list_head *l; | |
1422 | int len = 0; | |
1423 | ||
1424 | read_lock(&capidev_list_lock); | |
1425 | list_for_each(l, &capidev_list) { | |
1426 | cdev = list_entry(l, struct capidev, list); | |
1427 | for (np=cdev->nccis; np; np = np->next) { | |
1428 | len += sprintf(page+len, "%d 0x%x\n", | |
1429 | cdev->ap.applid, | |
1430 | np->ncci); | |
1431 | if (len <= off) { | |
1432 | off -= len; | |
1433 | len = 0; | |
1434 | } else { | |
1435 | if (len-off > count) | |
1436 | goto endloop; | |
1437 | } | |
1438 | } | |
1439 | } | |
1440 | endloop: | |
1441 | read_unlock(&capidev_list_lock); | |
1442 | *start = page+off; | |
1443 | if (len < count) | |
1444 | *eof = 1; | |
1445 | if (len>count) len = count; | |
1446 | if (len<0) len = 0; | |
1447 | return len; | |
1448 | } | |
1449 | ||
1450 | static struct procfsentries { | |
1451 | char *name; | |
1452 | mode_t mode; | |
1453 | int (*read_proc)(char *page, char **start, off_t off, | |
1454 | int count, int *eof, void *data); | |
1455 | struct proc_dir_entry *procent; | |
1456 | } procfsentries[] = { | |
1457 | /* { "capi", S_IFDIR, 0 }, */ | |
1458 | { "capi/capi20", 0 , proc_capidev_read_proc }, | |
1459 | { "capi/capi20ncci", 0 , proc_capincci_read_proc }, | |
1460 | }; | |
1461 | ||
1462 | static void __init proc_init(void) | |
1463 | { | |
1464 | int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]); | |
1465 | int i; | |
1466 | ||
1467 | for (i=0; i < nelem; i++) { | |
1468 | struct procfsentries *p = procfsentries + i; | |
1469 | p->procent = create_proc_entry(p->name, p->mode, NULL); | |
1470 | if (p->procent) p->procent->read_proc = p->read_proc; | |
1471 | } | |
1472 | } | |
1473 | ||
1474 | static void __exit proc_exit(void) | |
1475 | { | |
1476 | int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]); | |
1477 | int i; | |
1478 | ||
1479 | for (i=nelem-1; i >= 0; i--) { | |
1480 | struct procfsentries *p = procfsentries + i; | |
1481 | if (p->procent) { | |
1482 | remove_proc_entry(p->name, NULL); | |
1483 | p->procent = NULL; | |
1484 | } | |
1485 | } | |
1486 | } | |
1487 | ||
1488 | /* -------- init function and module interface ---------------------- */ | |
1489 | ||
1490 | ||
1491 | static char rev[32]; | |
1492 | ||
1493 | static int __init capi_init(void) | |
1494 | { | |
1495 | char *p; | |
1496 | char *compileinfo; | |
6d9eac34 | 1497 | int major_ret; |
1da177e4 LT |
1498 | |
1499 | if ((p = strchr(revision, ':')) != 0 && p[1]) { | |
1500 | strlcpy(rev, p + 2, sizeof(rev)); | |
1501 | if ((p = strchr(rev, '$')) != 0 && p > rev) | |
1502 | *(p-1) = 0; | |
1503 | } else | |
1504 | strcpy(rev, "1.0"); | |
1505 | ||
6d9eac34 AM |
1506 | major_ret = register_chrdev(capi_major, "capi20", &capi_fops); |
1507 | if (major_ret < 0) { | |
1da177e4 | 1508 | printk(KERN_ERR "capi20: unable to get major %d\n", capi_major); |
6d9eac34 | 1509 | return major_ret; |
1da177e4 | 1510 | } |
56b22935 | 1511 | capi_class = class_create(THIS_MODULE, "capi"); |
1da177e4 LT |
1512 | if (IS_ERR(capi_class)) { |
1513 | unregister_chrdev(capi_major, "capi20"); | |
1514 | return PTR_ERR(capi_class); | |
1515 | } | |
1516 | ||
53f46542 | 1517 | class_device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi"); |
1da177e4 LT |
1518 | |
1519 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
1520 | if (capinc_tty_init() < 0) { | |
56b22935 GKH |
1521 | class_device_destroy(capi_class, MKDEV(capi_major, 0)); |
1522 | class_destroy(capi_class); | |
1da177e4 LT |
1523 | unregister_chrdev(capi_major, "capi20"); |
1524 | return -ENOMEM; | |
1525 | } | |
1526 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
1527 | ||
1528 | proc_init(); | |
1529 | ||
1530 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
1531 | #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE) | |
1532 | compileinfo = " (middleware+capifs)"; | |
1533 | #else | |
1534 | compileinfo = " (no capifs)"; | |
1535 | #endif | |
1536 | #else | |
1537 | compileinfo = " (no middleware)"; | |
1538 | #endif | |
1539 | printk(KERN_NOTICE "capi20: Rev %s: started up with major %d%s\n", | |
1540 | rev, capi_major, compileinfo); | |
1541 | ||
1542 | return 0; | |
1543 | } | |
1544 | ||
1545 | static void __exit capi_exit(void) | |
1546 | { | |
1547 | proc_exit(); | |
1548 | ||
56b22935 GKH |
1549 | class_device_destroy(capi_class, MKDEV(capi_major, 0)); |
1550 | class_destroy(capi_class); | |
1da177e4 | 1551 | unregister_chrdev(capi_major, "capi20"); |
1da177e4 LT |
1552 | |
1553 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
1554 | capinc_tty_exit(); | |
1555 | #endif | |
1556 | printk(KERN_NOTICE "capi: Rev %s: unloaded\n", rev); | |
1557 | } | |
1558 | ||
1559 | module_init(capi_init); | |
1560 | module_exit(capi_exit); |