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Commit | Line | Data |
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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> | |
9ea6e5d8 | 21 | #include <linux/mutex.h> |
1da177e4 | 22 | #include <linux/mm.h> |
a237f3bb | 23 | #include <linux/smp_lock.h> |
1da177e4 LT |
24 | #include <linux/timer.h> |
25 | #include <linux/wait.h> | |
1da177e4 | 26 | #include <linux/tty.h> |
1da177e4 LT |
27 | #include <linux/netdevice.h> |
28 | #include <linux/ppp_defs.h> | |
29 | #include <linux/if_ppp.h> | |
1da177e4 LT |
30 | #include <linux/skbuff.h> |
31 | #include <linux/proc_fs.h> | |
9a58a80a | 32 | #include <linux/seq_file.h> |
1da177e4 LT |
33 | #include <linux/poll.h> |
34 | #include <linux/capi.h> | |
35 | #include <linux/kernelcapi.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/device.h> | |
38 | #include <linux/moduleparam.h> | |
1da177e4 LT |
39 | #include <linux/isdn/capiutil.h> |
40 | #include <linux/isdn/capicmd.h> | |
90926f0e | 41 | |
1da177e4 | 42 | #include "capifs.h" |
1da177e4 | 43 | |
1da177e4 LT |
44 | MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface"); |
45 | MODULE_AUTHOR("Carsten Paeth"); | |
46 | MODULE_LICENSE("GPL"); | |
47 | ||
48 | #undef _DEBUG_REFCOUNT /* alloc/free and open/close debug */ | |
49 | #undef _DEBUG_TTYFUNCS /* call to tty_driver */ | |
50 | #undef _DEBUG_DATAFLOW /* data flow */ | |
51 | ||
52 | /* -------- driver information -------------------------------------- */ | |
53 | ||
56b22935 | 54 | static struct class *capi_class; |
408b664a | 55 | static int capi_major = 68; /* allocated */ |
501c87a9 JK |
56 | |
57 | module_param_named(major, capi_major, uint, 0); | |
58 | ||
1da177e4 | 59 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
501c87a9 | 60 | #define CAPINC_NR_PORTS 32 |
1da177e4 | 61 | #define CAPINC_MAX_PORTS 256 |
501c87a9 | 62 | |
408b664a AB |
63 | static int capi_ttymajor = 191; |
64 | static int capi_ttyminors = CAPINC_NR_PORTS; | |
1da177e4 | 65 | |
1da177e4 LT |
66 | module_param_named(ttymajor, capi_ttymajor, uint, 0); |
67 | module_param_named(ttyminors, capi_ttyminors, uint, 0); | |
68 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
69 | ||
70 | /* -------- defines ------------------------------------------------- */ | |
71 | ||
72 | #define CAPINC_MAX_RECVQUEUE 10 | |
73 | #define CAPINC_MAX_SENDQUEUE 10 | |
74 | #define CAPI_MAX_BLKSIZE 2048 | |
75 | ||
76 | /* -------- data structures ----------------------------------------- */ | |
77 | ||
78 | struct capidev; | |
79 | struct capincci; | |
1da177e4 LT |
80 | struct capiminor; |
81 | ||
6aa65472 MB |
82 | struct datahandle_queue { |
83 | struct list_head list; | |
84 | u16 datahandle; | |
85 | }; | |
86 | ||
1da177e4 LT |
87 | struct capiminor { |
88 | struct list_head list; | |
89 | struct capincci *nccip; | |
90 | unsigned int minor; | |
90926f0e | 91 | struct dentry *capifs_dentry; |
1da177e4 LT |
92 | |
93 | struct capi20_appl *ap; | |
94 | u32 ncci; | |
95 | u16 datahandle; | |
96 | u16 msgid; | |
97 | ||
98 | struct tty_struct *tty; | |
99 | int ttyinstop; | |
100 | int ttyoutstop; | |
101 | struct sk_buff *ttyskb; | |
102 | atomic_t ttyopencount; | |
103 | ||
104 | struct sk_buff_head inqueue; | |
105 | int inbytes; | |
106 | struct sk_buff_head outqueue; | |
107 | int outbytes; | |
108 | ||
109 | /* transmit path */ | |
6aa65472 | 110 | struct list_head ackqueue; |
1da177e4 | 111 | int nack; |
6aa65472 | 112 | spinlock_t ackqlock; |
1da177e4 | 113 | }; |
1da177e4 | 114 | |
053b47ff MB |
115 | /* FIXME: The following lock is a sledgehammer-workaround to a |
116 | * locking issue with the capiminor (and maybe other) data structure(s). | |
117 | * Access to this data is done in a racy way and crashes the machine with | |
118 | * a FritzCard DSL driver; sooner or later. This is a workaround | |
119 | * which trades scalability vs stability, so it doesn't crash the kernel anymore. | |
120 | * The correct (and scalable) fix for the issue seems to require | |
121 | * an API change to the drivers... . */ | |
122 | static DEFINE_SPINLOCK(workaround_lock); | |
123 | ||
1da177e4 | 124 | struct capincci { |
884f5c44 | 125 | struct list_head list; |
1da177e4 LT |
126 | u32 ncci; |
127 | struct capidev *cdev; | |
128 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
129 | struct capiminor *minorp; | |
130 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
131 | }; | |
132 | ||
133 | struct capidev { | |
134 | struct list_head list; | |
135 | struct capi20_appl ap; | |
136 | u16 errcode; | |
137 | unsigned userflags; | |
138 | ||
139 | struct sk_buff_head recvqueue; | |
140 | wait_queue_head_t recvwait; | |
141 | ||
884f5c44 | 142 | struct list_head nccis; |
1da177e4 | 143 | |
05b41494 | 144 | struct mutex lock; |
1da177e4 LT |
145 | }; |
146 | ||
147 | /* -------- global variables ---------------------------------------- */ | |
148 | ||
b8f433dc | 149 | static DEFINE_MUTEX(capidev_list_lock); |
1da177e4 LT |
150 | static LIST_HEAD(capidev_list); |
151 | ||
152 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
501c87a9 | 153 | |
1da177e4 LT |
154 | static DEFINE_RWLOCK(capiminor_list_lock); |
155 | static LIST_HEAD(capiminor_list); | |
1da177e4 | 156 | |
1da177e4 LT |
157 | /* -------- datahandles --------------------------------------------- */ |
158 | ||
501c87a9 | 159 | static int capiminor_add_ack(struct capiminor *mp, u16 datahandle) |
1da177e4 | 160 | { |
6aa65472 MB |
161 | struct datahandle_queue *n; |
162 | unsigned long flags; | |
1da177e4 LT |
163 | |
164 | n = kmalloc(sizeof(*n), GFP_ATOMIC); | |
6aa65472 MB |
165 | if (unlikely(!n)) { |
166 | printk(KERN_ERR "capi: alloc datahandle failed\n"); | |
167 | return -1; | |
1da177e4 | 168 | } |
1da177e4 | 169 | n->datahandle = datahandle; |
6aa65472 MB |
170 | INIT_LIST_HEAD(&n->list); |
171 | spin_lock_irqsave(&mp->ackqlock, flags); | |
172 | list_add_tail(&n->list, &mp->ackqueue); | |
1da177e4 | 173 | mp->nack++; |
6aa65472 | 174 | spin_unlock_irqrestore(&mp->ackqlock, flags); |
1da177e4 LT |
175 | return 0; |
176 | } | |
177 | ||
178 | static int capiminor_del_ack(struct capiminor *mp, u16 datahandle) | |
179 | { | |
6aa65472 MB |
180 | struct datahandle_queue *p, *tmp; |
181 | unsigned long flags; | |
1da177e4 | 182 | |
6aa65472 MB |
183 | spin_lock_irqsave(&mp->ackqlock, flags); |
184 | list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { | |
185 | if (p->datahandle == datahandle) { | |
186 | list_del(&p->list); | |
1da177e4 LT |
187 | kfree(p); |
188 | mp->nack--; | |
6aa65472 | 189 | spin_unlock_irqrestore(&mp->ackqlock, flags); |
1da177e4 LT |
190 | return 0; |
191 | } | |
192 | } | |
6aa65472 | 193 | spin_unlock_irqrestore(&mp->ackqlock, flags); |
1da177e4 LT |
194 | return -1; |
195 | } | |
196 | ||
197 | static void capiminor_del_all_ack(struct capiminor *mp) | |
198 | { | |
6aa65472 MB |
199 | struct datahandle_queue *p, *tmp; |
200 | unsigned long flags; | |
1da177e4 | 201 | |
6aa65472 MB |
202 | spin_lock_irqsave(&mp->ackqlock, flags); |
203 | list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { | |
204 | list_del(&p->list); | |
1da177e4 LT |
205 | kfree(p); |
206 | mp->nack--; | |
207 | } | |
6aa65472 | 208 | spin_unlock_irqrestore(&mp->ackqlock, flags); |
1da177e4 LT |
209 | } |
210 | ||
211 | ||
212 | /* -------- struct capiminor ---------------------------------------- */ | |
213 | ||
214 | static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci) | |
215 | { | |
216 | struct capiminor *mp, *p; | |
217 | unsigned int minor = 0; | |
218 | unsigned long flags; | |
219 | ||
54f0fad3 | 220 | mp = kzalloc(sizeof(*mp), GFP_KERNEL); |
1da177e4 LT |
221 | if (!mp) { |
222 | printk(KERN_ERR "capi: can't alloc capiminor\n"); | |
223 | return NULL; | |
224 | } | |
225 | ||
1da177e4 LT |
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 | ||
d46604e1 | 272 | kfree_skb(mp->ttyskb); |
1da177e4 LT |
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 | } | |
1da177e4 LT |
297 | |
298 | /* -------- struct capincci ----------------------------------------- */ | |
299 | ||
501c87a9 | 300 | static void capincci_alloc_minor(struct capidev *cdev, struct capincci *np) |
1da177e4 | 301 | { |
501c87a9 | 302 | struct capiminor *mp; |
1da177e4 | 303 | |
501c87a9 JK |
304 | if (!(cdev->userflags & CAPIFLAG_HIGHJACKING)) |
305 | return; | |
306 | ||
307 | mp = np->minorp = capiminor_alloc(&cdev->ap, np->ncci); | |
1da177e4 LT |
308 | if (mp) { |
309 | mp->nccip = np; | |
310 | #ifdef _DEBUG_REFCOUNT | |
311 | printk(KERN_DEBUG "set mp->nccip\n"); | |
312 | #endif | |
90926f0e JK |
313 | mp->capifs_dentry = |
314 | capifs_new_ncci(mp->minor, | |
315 | MKDEV(capi_ttymajor, mp->minor)); | |
1da177e4 | 316 | } |
501c87a9 JK |
317 | } |
318 | ||
319 | static void capincci_free_minor(struct capincci *np) | |
320 | { | |
321 | struct capiminor *mp = np->minorp; | |
322 | ||
323 | if (mp) { | |
324 | capifs_free_ncci(mp->capifs_dentry); | |
325 | if (mp->tty) { | |
326 | mp->nccip = NULL; | |
327 | #ifdef _DEBUG_REFCOUNT | |
328 | printk(KERN_DEBUG "reset mp->nccip\n"); | |
329 | #endif | |
330 | tty_hangup(mp->tty); | |
331 | } else { | |
332 | capiminor_free(mp); | |
333 | } | |
334 | } | |
335 | } | |
336 | ||
337 | static inline unsigned int capincci_minor_opencount(struct capincci *np) | |
338 | { | |
339 | struct capiminor *mp = np->minorp; | |
340 | ||
341 | return mp ? atomic_read(&mp->ttyopencount) : 0; | |
342 | } | |
343 | ||
344 | #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
345 | ||
346 | static inline void | |
347 | capincci_alloc_minor(struct capidev *cdev, struct capincci *np) { } | |
348 | static inline void capincci_free_minor(struct capincci *np) { } | |
349 | ||
350 | static inline unsigned int capincci_minor_opencount(struct capincci *np) | |
351 | { | |
352 | return 0; | |
353 | } | |
354 | ||
355 | #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
356 | ||
357 | static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci) | |
358 | { | |
884f5c44 | 359 | struct capincci *np; |
501c87a9 | 360 | |
54f0fad3 | 361 | np = kzalloc(sizeof(*np), GFP_KERNEL); |
501c87a9 JK |
362 | if (!np) |
363 | return NULL; | |
364 | np->ncci = ncci; | |
365 | np->cdev = cdev; | |
366 | ||
367 | capincci_alloc_minor(cdev, np); | |
368 | ||
884f5c44 JK |
369 | list_add_tail(&np->list, &cdev->nccis); |
370 | ||
371 | return np; | |
1da177e4 LT |
372 | } |
373 | ||
374 | static void capincci_free(struct capidev *cdev, u32 ncci) | |
375 | { | |
884f5c44 | 376 | struct capincci *np, *tmp; |
1da177e4 | 377 | |
884f5c44 | 378 | list_for_each_entry_safe(np, tmp, &cdev->nccis, list) |
1da177e4 | 379 | if (ncci == 0xffffffff || np->ncci == ncci) { |
501c87a9 | 380 | capincci_free_minor(np); |
884f5c44 | 381 | list_del(&np->list); |
1da177e4 | 382 | kfree(np); |
1da177e4 | 383 | } |
1da177e4 LT |
384 | } |
385 | ||
386 | static struct capincci *capincci_find(struct capidev *cdev, u32 ncci) | |
387 | { | |
884f5c44 | 388 | struct capincci *np; |
1da177e4 | 389 | |
884f5c44 JK |
390 | list_for_each_entry(np, &cdev->nccis, list) |
391 | if (np->ncci == ncci) | |
392 | return np; | |
393 | return NULL; | |
1da177e4 LT |
394 | } |
395 | ||
1da177e4 LT |
396 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
397 | /* -------- handle data queue --------------------------------------- */ | |
398 | ||
399 | static struct sk_buff * | |
400 | gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb) | |
401 | { | |
402 | struct sk_buff *nskb; | |
403 | nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_ATOMIC); | |
404 | if (nskb) { | |
405 | u16 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4+4+2); | |
406 | unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN); | |
407 | capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN); | |
408 | capimsg_setu16(s, 2, mp->ap->applid); | |
409 | capimsg_setu8 (s, 4, CAPI_DATA_B3); | |
410 | capimsg_setu8 (s, 5, CAPI_RESP); | |
411 | capimsg_setu16(s, 6, mp->msgid++); | |
412 | capimsg_setu32(s, 8, mp->ncci); | |
413 | capimsg_setu16(s, 12, datahandle); | |
414 | } | |
415 | return nskb; | |
416 | } | |
417 | ||
418 | static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb) | |
419 | { | |
420 | struct sk_buff *nskb; | |
421 | int datalen; | |
422 | u16 errcode, datahandle; | |
423 | struct tty_ldisc *ld; | |
424 | ||
425 | datalen = skb->len - CAPIMSG_LEN(skb->data); | |
426 | if (mp->tty == NULL) | |
427 | { | |
428 | #ifdef _DEBUG_DATAFLOW | |
429 | printk(KERN_DEBUG "capi: currently no receiver\n"); | |
430 | #endif | |
431 | return -1; | |
432 | } | |
433 | ||
434 | ld = tty_ldisc_ref(mp->tty); | |
435 | if (ld == NULL) | |
436 | return -1; | |
a352def2 | 437 | if (ld->ops->receive_buf == NULL) { |
1da177e4 LT |
438 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) |
439 | printk(KERN_DEBUG "capi: ldisc has no receive_buf function\n"); | |
440 | #endif | |
441 | goto bad; | |
442 | } | |
443 | if (mp->ttyinstop) { | |
444 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) | |
445 | printk(KERN_DEBUG "capi: recv tty throttled\n"); | |
446 | #endif | |
447 | goto bad; | |
448 | } | |
33f0f88f | 449 | if (mp->tty->receive_room < datalen) { |
1da177e4 LT |
450 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) |
451 | printk(KERN_DEBUG "capi: no room in tty\n"); | |
452 | #endif | |
453 | goto bad; | |
454 | } | |
2f9e9b6d | 455 | if ((nskb = gen_data_b3_resp_for(mp, skb)) == NULL) { |
1da177e4 LT |
456 | printk(KERN_ERR "capi: gen_data_b3_resp failed\n"); |
457 | goto bad; | |
458 | } | |
459 | datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4); | |
460 | errcode = capi20_put_message(mp->ap, nskb); | |
461 | if (errcode != CAPI_NOERROR) { | |
462 | printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n", | |
463 | errcode); | |
464 | kfree_skb(nskb); | |
465 | goto bad; | |
466 | } | |
467 | (void)skb_pull(skb, CAPIMSG_LEN(skb->data)); | |
468 | #ifdef _DEBUG_DATAFLOW | |
469 | printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldisc\n", | |
470 | datahandle, skb->len); | |
471 | #endif | |
a352def2 | 472 | ld->ops->receive_buf(mp->tty, skb->data, NULL, skb->len); |
1da177e4 LT |
473 | kfree_skb(skb); |
474 | tty_ldisc_deref(ld); | |
475 | return 0; | |
476 | bad: | |
477 | tty_ldisc_deref(ld); | |
478 | return -1; | |
479 | } | |
480 | ||
481 | static void handle_minor_recv(struct capiminor *mp) | |
482 | { | |
483 | struct sk_buff *skb; | |
2f9e9b6d | 484 | while ((skb = skb_dequeue(&mp->inqueue)) != NULL) { |
1da177e4 LT |
485 | unsigned int len = skb->len; |
486 | mp->inbytes -= len; | |
487 | if (handle_recv_skb(mp, skb) < 0) { | |
488 | skb_queue_head(&mp->inqueue, skb); | |
489 | mp->inbytes += len; | |
490 | return; | |
491 | } | |
492 | } | |
493 | } | |
494 | ||
495 | static int handle_minor_send(struct capiminor *mp) | |
496 | { | |
497 | struct sk_buff *skb; | |
498 | u16 len; | |
499 | int count = 0; | |
500 | u16 errcode; | |
501 | u16 datahandle; | |
502 | ||
503 | if (mp->tty && mp->ttyoutstop) { | |
504 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) | |
505 | printk(KERN_DEBUG "capi: send: tty stopped\n"); | |
506 | #endif | |
507 | return 0; | |
508 | } | |
509 | ||
2f9e9b6d | 510 | while ((skb = skb_dequeue(&mp->outqueue)) != NULL) { |
1da177e4 LT |
511 | datahandle = mp->datahandle; |
512 | len = (u16)skb->len; | |
513 | skb_push(skb, CAPI_DATA_B3_REQ_LEN); | |
514 | memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN); | |
515 | capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN); | |
516 | capimsg_setu16(skb->data, 2, mp->ap->applid); | |
517 | capimsg_setu8 (skb->data, 4, CAPI_DATA_B3); | |
518 | capimsg_setu8 (skb->data, 5, CAPI_REQ); | |
519 | capimsg_setu16(skb->data, 6, mp->msgid++); | |
520 | capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */ | |
5e6c20a9 | 521 | capimsg_setu32(skb->data, 12, (u32)(long)skb->data);/* Data32 */ |
1da177e4 LT |
522 | capimsg_setu16(skb->data, 16, len); /* Data length */ |
523 | capimsg_setu16(skb->data, 18, datahandle); | |
524 | capimsg_setu16(skb->data, 20, 0); /* Flags */ | |
525 | ||
501c87a9 | 526 | if (capiminor_add_ack(mp, datahandle) < 0) { |
1da177e4 LT |
527 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); |
528 | skb_queue_head(&mp->outqueue, skb); | |
529 | return count; | |
530 | } | |
531 | errcode = capi20_put_message(mp->ap, skb); | |
532 | if (errcode == CAPI_NOERROR) { | |
533 | mp->datahandle++; | |
534 | count++; | |
535 | mp->outbytes -= len; | |
536 | #ifdef _DEBUG_DATAFLOW | |
537 | printk(KERN_DEBUG "capi: DATA_B3_REQ %u len=%u\n", | |
538 | datahandle, len); | |
539 | #endif | |
540 | continue; | |
541 | } | |
542 | capiminor_del_ack(mp, datahandle); | |
543 | ||
544 | if (errcode == CAPI_SENDQUEUEFULL) { | |
545 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); | |
546 | skb_queue_head(&mp->outqueue, skb); | |
547 | break; | |
548 | } | |
549 | ||
550 | /* ups, drop packet */ | |
551 | printk(KERN_ERR "capi: put_message = %x\n", errcode); | |
552 | mp->outbytes -= len; | |
553 | kfree_skb(skb); | |
554 | } | |
555 | return count; | |
556 | } | |
557 | ||
558 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
559 | /* -------- function called by lower level -------------------------- */ | |
560 | ||
561 | static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb) | |
562 | { | |
563 | struct capidev *cdev = ap->private; | |
564 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
565 | struct capiminor *mp; | |
566 | u16 datahandle; | |
567 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
568 | struct capincci *np; | |
053b47ff | 569 | unsigned long flags; |
1da177e4 | 570 | |
05b41494 JK |
571 | mutex_lock(&cdev->lock); |
572 | ||
1da177e4 LT |
573 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) { |
574 | u16 info = CAPIMSG_U16(skb->data, 12); // Info field | |
05b41494 | 575 | if ((info & 0xff00) == 0) |
1da177e4 | 576 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); |
1da177e4 | 577 | } |
05b41494 | 578 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) |
1da177e4 | 579 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); |
05b41494 | 580 | |
053b47ff | 581 | spin_lock_irqsave(&workaround_lock, flags); |
1da177e4 LT |
582 | if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) { |
583 | skb_queue_tail(&cdev->recvqueue, skb); | |
584 | wake_up_interruptible(&cdev->recvwait); | |
05b41494 | 585 | goto unlock_out; |
1da177e4 | 586 | } |
05b41494 JK |
587 | |
588 | np = capincci_find(cdev, CAPIMSG_CONTROL(skb->data)); | |
1da177e4 LT |
589 | if (!np) { |
590 | printk(KERN_ERR "BUG: capi_signal: ncci not found\n"); | |
591 | skb_queue_tail(&cdev->recvqueue, skb); | |
592 | wake_up_interruptible(&cdev->recvwait); | |
05b41494 | 593 | goto unlock_out; |
1da177e4 | 594 | } |
501c87a9 | 595 | |
1da177e4 LT |
596 | #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE |
597 | skb_queue_tail(&cdev->recvqueue, skb); | |
598 | wake_up_interruptible(&cdev->recvwait); | |
501c87a9 | 599 | |
1da177e4 | 600 | #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
501c87a9 | 601 | |
1da177e4 LT |
602 | mp = np->minorp; |
603 | if (!mp) { | |
604 | skb_queue_tail(&cdev->recvqueue, skb); | |
605 | wake_up_interruptible(&cdev->recvwait); | |
05b41494 | 606 | goto unlock_out; |
1da177e4 | 607 | } |
1da177e4 | 608 | if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) { |
1da177e4 LT |
609 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+4+2); |
610 | #ifdef _DEBUG_DATAFLOW | |
611 | printk(KERN_DEBUG "capi_signal: DATA_B3_IND %u len=%d\n", | |
612 | datahandle, skb->len-CAPIMSG_LEN(skb->data)); | |
613 | #endif | |
614 | skb_queue_tail(&mp->inqueue, skb); | |
615 | mp->inbytes += skb->len; | |
616 | handle_minor_recv(mp); | |
617 | ||
618 | } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) { | |
619 | ||
620 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4); | |
621 | #ifdef _DEBUG_DATAFLOW | |
622 | printk(KERN_DEBUG "capi_signal: DATA_B3_CONF %u 0x%x\n", | |
623 | datahandle, | |
624 | CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+2)); | |
625 | #endif | |
626 | kfree_skb(skb); | |
627 | (void)capiminor_del_ack(mp, datahandle); | |
628 | if (mp->tty) | |
629 | tty_wakeup(mp->tty); | |
630 | (void)handle_minor_send(mp); | |
631 | ||
632 | } else { | |
633 | /* ups, let capi application handle it :-) */ | |
634 | skb_queue_tail(&cdev->recvqueue, skb); | |
635 | wake_up_interruptible(&cdev->recvwait); | |
636 | } | |
637 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
501c87a9 | 638 | |
05b41494 | 639 | unlock_out: |
053b47ff | 640 | spin_unlock_irqrestore(&workaround_lock, flags); |
05b41494 | 641 | mutex_unlock(&cdev->lock); |
1da177e4 LT |
642 | } |
643 | ||
644 | /* -------- file_operations for capidev ----------------------------- */ | |
645 | ||
646 | static ssize_t | |
647 | capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
648 | { | |
649 | struct capidev *cdev = (struct capidev *)file->private_data; | |
650 | struct sk_buff *skb; | |
651 | size_t copied; | |
28a1dbb6 | 652 | int err; |
1da177e4 LT |
653 | |
654 | if (!cdev->ap.applid) | |
655 | return -ENODEV; | |
656 | ||
28a1dbb6 JK |
657 | skb = skb_dequeue(&cdev->recvqueue); |
658 | if (!skb) { | |
1da177e4 LT |
659 | if (file->f_flags & O_NONBLOCK) |
660 | return -EAGAIN; | |
28a1dbb6 JK |
661 | err = wait_event_interruptible(cdev->recvwait, |
662 | (skb = skb_dequeue(&cdev->recvqueue))); | |
663 | if (err) | |
664 | return err; | |
1da177e4 LT |
665 | } |
666 | if (skb->len > count) { | |
667 | skb_queue_head(&cdev->recvqueue, skb); | |
668 | return -EMSGSIZE; | |
669 | } | |
670 | if (copy_to_user(buf, skb->data, skb->len)) { | |
671 | skb_queue_head(&cdev->recvqueue, skb); | |
672 | return -EFAULT; | |
673 | } | |
674 | copied = skb->len; | |
675 | ||
676 | kfree_skb(skb); | |
677 | ||
678 | return copied; | |
679 | } | |
680 | ||
681 | static ssize_t | |
682 | capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
683 | { | |
684 | struct capidev *cdev = (struct capidev *)file->private_data; | |
685 | struct sk_buff *skb; | |
686 | u16 mlen; | |
687 | ||
688 | if (!cdev->ap.applid) | |
689 | return -ENODEV; | |
690 | ||
691 | skb = alloc_skb(count, GFP_USER); | |
692 | if (!skb) | |
693 | return -ENOMEM; | |
694 | ||
695 | if (copy_from_user(skb_put(skb, count), buf, count)) { | |
696 | kfree_skb(skb); | |
697 | return -EFAULT; | |
698 | } | |
699 | mlen = CAPIMSG_LEN(skb->data); | |
700 | if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) { | |
701 | if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) { | |
702 | kfree_skb(skb); | |
703 | return -EINVAL; | |
704 | } | |
705 | } else { | |
706 | if (mlen != count) { | |
707 | kfree_skb(skb); | |
708 | return -EINVAL; | |
709 | } | |
710 | } | |
711 | CAPIMSG_SETAPPID(skb->data, cdev->ap.applid); | |
712 | ||
713 | if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) { | |
05b41494 | 714 | mutex_lock(&cdev->lock); |
1da177e4 | 715 | capincci_free(cdev, CAPIMSG_NCCI(skb->data)); |
05b41494 | 716 | mutex_unlock(&cdev->lock); |
1da177e4 LT |
717 | } |
718 | ||
719 | cdev->errcode = capi20_put_message(&cdev->ap, skb); | |
720 | ||
721 | if (cdev->errcode) { | |
722 | kfree_skb(skb); | |
723 | return -EIO; | |
724 | } | |
725 | return count; | |
726 | } | |
727 | ||
728 | static unsigned int | |
729 | capi_poll(struct file *file, poll_table * wait) | |
730 | { | |
731 | struct capidev *cdev = (struct capidev *)file->private_data; | |
732 | unsigned int mask = 0; | |
733 | ||
734 | if (!cdev->ap.applid) | |
735 | return POLLERR; | |
736 | ||
737 | poll_wait(file, &(cdev->recvwait), wait); | |
738 | mask = POLLOUT | POLLWRNORM; | |
739 | if (!skb_queue_empty(&cdev->recvqueue)) | |
740 | mask |= POLLIN | POLLRDNORM; | |
741 | return mask; | |
742 | } | |
743 | ||
744 | static int | |
745 | capi_ioctl(struct inode *inode, struct file *file, | |
746 | unsigned int cmd, unsigned long arg) | |
747 | { | |
748 | struct capidev *cdev = file->private_data; | |
1da177e4 LT |
749 | capi_ioctl_struct data; |
750 | int retval = -EINVAL; | |
751 | void __user *argp = (void __user *)arg; | |
752 | ||
753 | switch (cmd) { | |
754 | case CAPI_REGISTER: | |
05b41494 | 755 | mutex_lock(&cdev->lock); |
1da177e4 | 756 | |
05b41494 JK |
757 | if (cdev->ap.applid) { |
758 | retval = -EEXIST; | |
759 | goto register_out; | |
760 | } | |
761 | if (copy_from_user(&cdev->ap.rparam, argp, | |
762 | sizeof(struct capi_register_params))) { | |
763 | retval = -EFAULT; | |
764 | goto register_out; | |
765 | } | |
766 | cdev->ap.private = cdev; | |
767 | cdev->ap.recv_message = capi_recv_message; | |
768 | cdev->errcode = capi20_register(&cdev->ap); | |
769 | retval = (int)cdev->ap.applid; | |
770 | if (cdev->errcode) { | |
771 | cdev->ap.applid = 0; | |
772 | retval = -EIO; | |
1da177e4 | 773 | } |
05b41494 JK |
774 | |
775 | register_out: | |
776 | mutex_unlock(&cdev->lock); | |
777 | return retval; | |
1da177e4 LT |
778 | |
779 | case CAPI_GET_VERSION: | |
780 | { | |
781 | if (copy_from_user(&data.contr, argp, | |
782 | sizeof(data.contr))) | |
783 | return -EFAULT; | |
784 | cdev->errcode = capi20_get_version(data.contr, &data.version); | |
785 | if (cdev->errcode) | |
786 | return -EIO; | |
787 | if (copy_to_user(argp, &data.version, | |
788 | sizeof(data.version))) | |
789 | return -EFAULT; | |
790 | } | |
791 | return 0; | |
792 | ||
793 | case CAPI_GET_SERIAL: | |
794 | { | |
795 | if (copy_from_user(&data.contr, argp, | |
796 | sizeof(data.contr))) | |
797 | return -EFAULT; | |
798 | cdev->errcode = capi20_get_serial (data.contr, data.serial); | |
799 | if (cdev->errcode) | |
800 | return -EIO; | |
801 | if (copy_to_user(argp, data.serial, | |
802 | sizeof(data.serial))) | |
803 | return -EFAULT; | |
804 | } | |
805 | return 0; | |
806 | case CAPI_GET_PROFILE: | |
807 | { | |
808 | if (copy_from_user(&data.contr, argp, | |
809 | sizeof(data.contr))) | |
810 | return -EFAULT; | |
811 | ||
812 | if (data.contr == 0) { | |
813 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); | |
814 | if (cdev->errcode) | |
815 | return -EIO; | |
816 | ||
817 | retval = copy_to_user(argp, | |
818 | &data.profile.ncontroller, | |
819 | sizeof(data.profile.ncontroller)); | |
820 | ||
821 | } else { | |
822 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); | |
823 | if (cdev->errcode) | |
824 | return -EIO; | |
825 | ||
826 | retval = copy_to_user(argp, &data.profile, | |
827 | sizeof(data.profile)); | |
828 | } | |
829 | if (retval) | |
830 | return -EFAULT; | |
831 | } | |
832 | return 0; | |
833 | ||
834 | case CAPI_GET_MANUFACTURER: | |
835 | { | |
836 | if (copy_from_user(&data.contr, argp, | |
837 | sizeof(data.contr))) | |
838 | return -EFAULT; | |
839 | cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer); | |
840 | if (cdev->errcode) | |
841 | return -EIO; | |
842 | ||
843 | if (copy_to_user(argp, data.manufacturer, | |
844 | sizeof(data.manufacturer))) | |
845 | return -EFAULT; | |
846 | ||
847 | } | |
848 | return 0; | |
849 | case CAPI_GET_ERRCODE: | |
850 | data.errcode = cdev->errcode; | |
851 | cdev->errcode = CAPI_NOERROR; | |
852 | if (arg) { | |
853 | if (copy_to_user(argp, &data.errcode, | |
854 | sizeof(data.errcode))) | |
855 | return -EFAULT; | |
856 | } | |
857 | return data.errcode; | |
858 | ||
859 | case CAPI_INSTALLED: | |
860 | if (capi20_isinstalled() == CAPI_NOERROR) | |
861 | return 0; | |
862 | return -ENXIO; | |
863 | ||
864 | case CAPI_MANUFACTURER_CMD: | |
865 | { | |
866 | struct capi_manufacturer_cmd mcmd; | |
867 | if (!capable(CAP_SYS_ADMIN)) | |
868 | return -EPERM; | |
869 | if (copy_from_user(&mcmd, argp, sizeof(mcmd))) | |
870 | return -EFAULT; | |
871 | return capi20_manufacturer(mcmd.cmd, mcmd.data); | |
872 | } | |
873 | return 0; | |
874 | ||
875 | case CAPI_SET_FLAGS: | |
05b41494 JK |
876 | case CAPI_CLR_FLAGS: { |
877 | unsigned userflags; | |
878 | ||
879 | if (copy_from_user(&userflags, argp, sizeof(userflags))) | |
880 | return -EFAULT; | |
1da177e4 | 881 | |
05b41494 JK |
882 | mutex_lock(&cdev->lock); |
883 | if (cmd == CAPI_SET_FLAGS) | |
884 | cdev->userflags |= userflags; | |
885 | else | |
886 | cdev->userflags &= ~userflags; | |
887 | mutex_unlock(&cdev->lock); | |
888 | return 0; | |
889 | } | |
1da177e4 LT |
890 | case CAPI_GET_FLAGS: |
891 | if (copy_to_user(argp, &cdev->userflags, | |
892 | sizeof(cdev->userflags))) | |
893 | return -EFAULT; | |
894 | return 0; | |
895 | ||
05b41494 JK |
896 | case CAPI_NCCI_OPENCOUNT: { |
897 | struct capincci *nccip; | |
898 | unsigned ncci; | |
899 | int count = 0; | |
1da177e4 | 900 | |
05b41494 JK |
901 | if (copy_from_user(&ncci, argp, sizeof(ncci))) |
902 | return -EFAULT; | |
903 | ||
904 | mutex_lock(&cdev->lock); | |
905 | nccip = capincci_find(cdev, (u32)ncci); | |
906 | if (nccip) | |
907 | count = capincci_minor_opencount(nccip); | |
908 | mutex_unlock(&cdev->lock); | |
909 | return count; | |
910 | } | |
1da177e4 LT |
911 | |
912 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
05b41494 JK |
913 | case CAPI_NCCI_GETUNIT: { |
914 | struct capincci *nccip; | |
915 | struct capiminor *mp; | |
916 | unsigned ncci; | |
917 | int unit = -ESRCH; | |
918 | ||
919 | if (copy_from_user(&ncci, argp, sizeof(ncci))) | |
920 | return -EFAULT; | |
921 | ||
922 | mutex_lock(&cdev->lock); | |
923 | nccip = capincci_find(cdev, (u32)ncci); | |
924 | if (nccip) { | |
925 | mp = nccip->minorp; | |
926 | if (mp) | |
927 | unit = mp->minor; | |
1da177e4 | 928 | } |
05b41494 JK |
929 | mutex_unlock(&cdev->lock); |
930 | return unit; | |
931 | } | |
1da177e4 | 932 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
05b41494 JK |
933 | |
934 | default: | |
935 | return -EINVAL; | |
1da177e4 | 936 | } |
1da177e4 LT |
937 | } |
938 | ||
eca39dd8 | 939 | static int capi_open(struct inode *inode, struct file *file) |
1da177e4 | 940 | { |
eca39dd8 JK |
941 | struct capidev *cdev; |
942 | ||
943 | cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); | |
944 | if (!cdev) | |
945 | return -ENOMEM; | |
946 | ||
05b41494 | 947 | mutex_init(&cdev->lock); |
eca39dd8 JK |
948 | skb_queue_head_init(&cdev->recvqueue); |
949 | init_waitqueue_head(&cdev->recvwait); | |
884f5c44 | 950 | INIT_LIST_HEAD(&cdev->nccis); |
eca39dd8 JK |
951 | file->private_data = cdev; |
952 | ||
953 | mutex_lock(&capidev_list_lock); | |
954 | list_add_tail(&cdev->list, &capidev_list); | |
955 | mutex_unlock(&capidev_list_lock); | |
956 | ||
957 | return nonseekable_open(inode, file); | |
1da177e4 LT |
958 | } |
959 | ||
eca39dd8 | 960 | static int capi_release(struct inode *inode, struct file *file) |
1da177e4 | 961 | { |
eca39dd8 | 962 | struct capidev *cdev = file->private_data; |
1da177e4 | 963 | |
eca39dd8 JK |
964 | mutex_lock(&capidev_list_lock); |
965 | list_del(&cdev->list); | |
966 | mutex_unlock(&capidev_list_lock); | |
967 | ||
05b41494 | 968 | if (cdev->ap.applid) |
eca39dd8 | 969 | capi20_release(&cdev->ap); |
eca39dd8 | 970 | skb_queue_purge(&cdev->recvqueue); |
eca39dd8 | 971 | capincci_free(cdev, 0xffffffff); |
eca39dd8 JK |
972 | |
973 | kfree(cdev); | |
1da177e4 LT |
974 | return 0; |
975 | } | |
976 | ||
2b8693c0 | 977 | static const struct file_operations capi_fops = |
1da177e4 LT |
978 | { |
979 | .owner = THIS_MODULE, | |
980 | .llseek = no_llseek, | |
981 | .read = capi_read, | |
982 | .write = capi_write, | |
983 | .poll = capi_poll, | |
984 | .ioctl = capi_ioctl, | |
985 | .open = capi_open, | |
986 | .release = capi_release, | |
987 | }; | |
988 | ||
989 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
990 | /* -------- tty_operations for capincci ----------------------------- */ | |
991 | ||
992 | static int capinc_tty_open(struct tty_struct * tty, struct file * file) | |
993 | { | |
994 | struct capiminor *mp; | |
053b47ff | 995 | unsigned long flags; |
1da177e4 | 996 | |
2f9e9b6d | 997 | if ((mp = capiminor_find(iminor(file->f_path.dentry->d_inode))) == NULL) |
1da177e4 | 998 | return -ENXIO; |
2f9e9b6d | 999 | if (mp->nccip == NULL) |
1da177e4 LT |
1000 | return -ENXIO; |
1001 | ||
1002 | tty->driver_data = (void *)mp; | |
1003 | ||
053b47ff | 1004 | spin_lock_irqsave(&workaround_lock, flags); |
1da177e4 LT |
1005 | if (atomic_read(&mp->ttyopencount) == 0) |
1006 | mp->tty = tty; | |
1007 | atomic_inc(&mp->ttyopencount); | |
1008 | #ifdef _DEBUG_REFCOUNT | |
1009 | printk(KERN_DEBUG "capinc_tty_open ocount=%d\n", atomic_read(&mp->ttyopencount)); | |
1010 | #endif | |
1011 | handle_minor_recv(mp); | |
053b47ff | 1012 | spin_unlock_irqrestore(&workaround_lock, flags); |
1da177e4 LT |
1013 | return 0; |
1014 | } | |
1015 | ||
1016 | static void capinc_tty_close(struct tty_struct * tty, struct file * file) | |
1017 | { | |
1018 | struct capiminor *mp; | |
1019 | ||
1020 | mp = (struct capiminor *)tty->driver_data; | |
1021 | if (mp) { | |
1022 | if (atomic_dec_and_test(&mp->ttyopencount)) { | |
1023 | #ifdef _DEBUG_REFCOUNT | |
1024 | printk(KERN_DEBUG "capinc_tty_close lastclose\n"); | |
1025 | #endif | |
1026 | tty->driver_data = NULL; | |
1027 | mp->tty = NULL; | |
1028 | } | |
1029 | #ifdef _DEBUG_REFCOUNT | |
1030 | printk(KERN_DEBUG "capinc_tty_close ocount=%d\n", atomic_read(&mp->ttyopencount)); | |
1031 | #endif | |
2f9e9b6d | 1032 | if (mp->nccip == NULL) |
1da177e4 LT |
1033 | capiminor_free(mp); |
1034 | } | |
1035 | ||
1036 | #ifdef _DEBUG_REFCOUNT | |
1037 | printk(KERN_DEBUG "capinc_tty_close\n"); | |
1038 | #endif | |
1039 | } | |
1040 | ||
1041 | static int capinc_tty_write(struct tty_struct * tty, | |
1042 | const unsigned char *buf, int count) | |
1043 | { | |
1044 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1045 | struct sk_buff *skb; | |
053b47ff | 1046 | unsigned long flags; |
1da177e4 LT |
1047 | |
1048 | #ifdef _DEBUG_TTYFUNCS | |
1049 | printk(KERN_DEBUG "capinc_tty_write(count=%d)\n", count); | |
1050 | #endif | |
1051 | ||
1052 | if (!mp || !mp->nccip) { | |
1053 | #ifdef _DEBUG_TTYFUNCS | |
1054 | printk(KERN_DEBUG "capinc_tty_write: mp or mp->ncci NULL\n"); | |
1055 | #endif | |
1056 | return 0; | |
1057 | } | |
1058 | ||
053b47ff | 1059 | spin_lock_irqsave(&workaround_lock, flags); |
1da177e4 LT |
1060 | skb = mp->ttyskb; |
1061 | if (skb) { | |
1062 | mp->ttyskb = NULL; | |
1063 | skb_queue_tail(&mp->outqueue, skb); | |
1064 | mp->outbytes += skb->len; | |
1065 | } | |
1066 | ||
1067 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC); | |
1068 | if (!skb) { | |
1069 | printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n"); | |
053b47ff | 1070 | spin_unlock_irqrestore(&workaround_lock, flags); |
1da177e4 LT |
1071 | return -ENOMEM; |
1072 | } | |
1073 | ||
1074 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); | |
1075 | memcpy(skb_put(skb, count), buf, count); | |
1076 | ||
1077 | skb_queue_tail(&mp->outqueue, skb); | |
1078 | mp->outbytes += skb->len; | |
1079 | (void)handle_minor_send(mp); | |
1080 | (void)handle_minor_recv(mp); | |
053b47ff | 1081 | spin_unlock_irqrestore(&workaround_lock, flags); |
1da177e4 LT |
1082 | return count; |
1083 | } | |
1084 | ||
f2545a75 | 1085 | static int capinc_tty_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 LT |
1086 | { |
1087 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1088 | struct sk_buff *skb; | |
053b47ff | 1089 | unsigned long flags; |
f2545a75 | 1090 | int ret = 1; |
1da177e4 LT |
1091 | |
1092 | #ifdef _DEBUG_TTYFUNCS | |
1093 | printk(KERN_DEBUG "capinc_put_char(%u)\n", ch); | |
1094 | #endif | |
1095 | ||
1096 | if (!mp || !mp->nccip) { | |
1097 | #ifdef _DEBUG_TTYFUNCS | |
1098 | printk(KERN_DEBUG "capinc_tty_put_char: mp or mp->ncci NULL\n"); | |
1099 | #endif | |
f2545a75 | 1100 | return 0; |
1da177e4 LT |
1101 | } |
1102 | ||
053b47ff | 1103 | spin_lock_irqsave(&workaround_lock, flags); |
1da177e4 LT |
1104 | skb = mp->ttyskb; |
1105 | if (skb) { | |
1106 | if (skb_tailroom(skb) > 0) { | |
1107 | *(skb_put(skb, 1)) = ch; | |
053b47ff | 1108 | spin_unlock_irqrestore(&workaround_lock, flags); |
f2545a75 | 1109 | return 1; |
1da177e4 LT |
1110 | } |
1111 | mp->ttyskb = NULL; | |
1112 | skb_queue_tail(&mp->outqueue, skb); | |
1113 | mp->outbytes += skb->len; | |
1114 | (void)handle_minor_send(mp); | |
1115 | } | |
1116 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+CAPI_MAX_BLKSIZE, GFP_ATOMIC); | |
1117 | if (skb) { | |
1118 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); | |
1119 | *(skb_put(skb, 1)) = ch; | |
1120 | mp->ttyskb = skb; | |
1121 | } else { | |
1122 | printk(KERN_ERR "capinc_put_char: char %u lost\n", ch); | |
f2545a75 | 1123 | ret = 0; |
1da177e4 | 1124 | } |
053b47ff | 1125 | spin_unlock_irqrestore(&workaround_lock, flags); |
f2545a75 | 1126 | return ret; |
1da177e4 LT |
1127 | } |
1128 | ||
1129 | static void capinc_tty_flush_chars(struct tty_struct *tty) | |
1130 | { | |
1131 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1132 | struct sk_buff *skb; | |
053b47ff | 1133 | unsigned long flags; |
1da177e4 LT |
1134 | |
1135 | #ifdef _DEBUG_TTYFUNCS | |
1136 | printk(KERN_DEBUG "capinc_tty_flush_chars\n"); | |
1137 | #endif | |
1138 | ||
1139 | if (!mp || !mp->nccip) { | |
1140 | #ifdef _DEBUG_TTYFUNCS | |
1141 | printk(KERN_DEBUG "capinc_tty_flush_chars: mp or mp->ncci NULL\n"); | |
1142 | #endif | |
1143 | return; | |
1144 | } | |
1145 | ||
053b47ff | 1146 | spin_lock_irqsave(&workaround_lock, flags); |
1da177e4 LT |
1147 | skb = mp->ttyskb; |
1148 | if (skb) { | |
1149 | mp->ttyskb = NULL; | |
1150 | skb_queue_tail(&mp->outqueue, skb); | |
1151 | mp->outbytes += skb->len; | |
1152 | (void)handle_minor_send(mp); | |
1153 | } | |
1154 | (void)handle_minor_recv(mp); | |
053b47ff | 1155 | spin_unlock_irqrestore(&workaround_lock, flags); |
1da177e4 LT |
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: | |
53e86317 | 1200 | error = n_tty_ioctl_helper(tty, file, cmd, arg); |
1da177e4 LT |
1201 | break; |
1202 | } | |
1203 | return error; | |
1204 | } | |
1205 | ||
606d099c | 1206 | static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios * old) |
1da177e4 LT |
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; | |
053b47ff | 1226 | unsigned long flags; |
1da177e4 LT |
1227 | #ifdef _DEBUG_TTYFUNCS |
1228 | printk(KERN_DEBUG "capinc_tty_unthrottle\n"); | |
1229 | #endif | |
1230 | if (mp) { | |
053b47ff | 1231 | spin_lock_irqsave(&workaround_lock, flags); |
1da177e4 LT |
1232 | mp->ttyinstop = 0; |
1233 | handle_minor_recv(mp); | |
053b47ff | 1234 | spin_unlock_irqrestore(&workaround_lock, flags); |
1da177e4 LT |
1235 | } |
1236 | } | |
1237 | ||
1238 | static void capinc_tty_stop(struct tty_struct *tty) | |
1239 | { | |
1240 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1241 | #ifdef _DEBUG_TTYFUNCS | |
1242 | printk(KERN_DEBUG "capinc_tty_stop\n"); | |
1243 | #endif | |
1244 | if (mp) { | |
1245 | mp->ttyoutstop = 1; | |
1246 | } | |
1247 | } | |
1248 | ||
1249 | static void capinc_tty_start(struct tty_struct *tty) | |
1250 | { | |
1251 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
053b47ff | 1252 | unsigned long flags; |
1da177e4 LT |
1253 | #ifdef _DEBUG_TTYFUNCS |
1254 | printk(KERN_DEBUG "capinc_tty_start\n"); | |
1255 | #endif | |
1256 | if (mp) { | |
053b47ff | 1257 | spin_lock_irqsave(&workaround_lock, flags); |
1da177e4 LT |
1258 | mp->ttyoutstop = 0; |
1259 | (void)handle_minor_send(mp); | |
053b47ff | 1260 | spin_unlock_irqrestore(&workaround_lock, flags); |
1da177e4 LT |
1261 | } |
1262 | } | |
1263 | ||
1264 | static void capinc_tty_hangup(struct tty_struct *tty) | |
1265 | { | |
1266 | #ifdef _DEBUG_TTYFUNCS | |
1267 | printk(KERN_DEBUG "capinc_tty_hangup\n"); | |
1268 | #endif | |
1269 | } | |
1270 | ||
9e98966c | 1271 | static int capinc_tty_break_ctl(struct tty_struct *tty, int state) |
1da177e4 LT |
1272 | { |
1273 | #ifdef _DEBUG_TTYFUNCS | |
1274 | printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state); | |
1275 | #endif | |
9e98966c | 1276 | return 0; |
1da177e4 LT |
1277 | } |
1278 | ||
1279 | static void capinc_tty_flush_buffer(struct tty_struct *tty) | |
1280 | { | |
1281 | #ifdef _DEBUG_TTYFUNCS | |
1282 | printk(KERN_DEBUG "capinc_tty_flush_buffer\n"); | |
1283 | #endif | |
1284 | } | |
1285 | ||
1286 | static void capinc_tty_set_ldisc(struct tty_struct *tty) | |
1287 | { | |
1288 | #ifdef _DEBUG_TTYFUNCS | |
1289 | printk(KERN_DEBUG "capinc_tty_set_ldisc\n"); | |
1290 | #endif | |
1291 | } | |
1292 | ||
1293 | static void capinc_tty_send_xchar(struct tty_struct *tty, char ch) | |
1294 | { | |
1295 | #ifdef _DEBUG_TTYFUNCS | |
1296 | printk(KERN_DEBUG "capinc_tty_send_xchar(%d)\n", ch); | |
1297 | #endif | |
1298 | } | |
1299 | ||
1da177e4 LT |
1300 | static struct tty_driver *capinc_tty_driver; |
1301 | ||
b68e31d0 | 1302 | static const struct tty_operations capinc_ops = { |
1da177e4 LT |
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, | |
1da177e4 LT |
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 | ||
501c87a9 JK |
1368 | #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
1369 | ||
1370 | static inline int capinc_tty_init(void) | |
1371 | { | |
1372 | return 0; | |
1373 | } | |
1374 | ||
1375 | static inline void capinc_tty_exit(void) { } | |
1376 | ||
1377 | #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
1da177e4 LT |
1378 | |
1379 | /* -------- /proc functions ----------------------------------------- */ | |
1380 | ||
1381 | /* | |
1382 | * /proc/capi/capi20: | |
1383 | * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt | |
1384 | */ | |
9a58a80a | 1385 | static int capi20_proc_show(struct seq_file *m, void *v) |
1da177e4 LT |
1386 | { |
1387 | struct capidev *cdev; | |
1388 | struct list_head *l; | |
1da177e4 | 1389 | |
b8f433dc | 1390 | mutex_lock(&capidev_list_lock); |
1da177e4 LT |
1391 | list_for_each(l, &capidev_list) { |
1392 | cdev = list_entry(l, struct capidev, list); | |
9a58a80a | 1393 | seq_printf(m, "0 %d %lu %lu %lu %lu\n", |
1da177e4 LT |
1394 | cdev->ap.applid, |
1395 | cdev->ap.nrecvctlpkt, | |
1396 | cdev->ap.nrecvdatapkt, | |
1397 | cdev->ap.nsentctlpkt, | |
1398 | cdev->ap.nsentdatapkt); | |
1da177e4 | 1399 | } |
b8f433dc | 1400 | mutex_unlock(&capidev_list_lock); |
9a58a80a | 1401 | return 0; |
1da177e4 LT |
1402 | } |
1403 | ||
9a58a80a AD |
1404 | static int capi20_proc_open(struct inode *inode, struct file *file) |
1405 | { | |
1406 | return single_open(file, capi20_proc_show, NULL); | |
1407 | } | |
1408 | ||
1409 | static const struct file_operations capi20_proc_fops = { | |
1410 | .owner = THIS_MODULE, | |
1411 | .open = capi20_proc_open, | |
1412 | .read = seq_read, | |
1413 | .llseek = seq_lseek, | |
1414 | .release = single_release, | |
1415 | }; | |
1416 | ||
1da177e4 LT |
1417 | /* |
1418 | * /proc/capi/capi20ncci: | |
1419 | * applid ncci | |
1420 | */ | |
9a58a80a | 1421 | static int capi20ncci_proc_show(struct seq_file *m, void *v) |
1da177e4 | 1422 | { |
884f5c44 JK |
1423 | struct capidev *cdev; |
1424 | struct capincci *np; | |
1da177e4 | 1425 | |
b8f433dc | 1426 | mutex_lock(&capidev_list_lock); |
884f5c44 | 1427 | list_for_each_entry(cdev, &capidev_list, list) { |
05b41494 | 1428 | mutex_lock(&cdev->lock); |
884f5c44 JK |
1429 | list_for_each_entry(np, &cdev->nccis, list) |
1430 | seq_printf(m, "%d 0x%x\n", cdev->ap.applid, np->ncci); | |
05b41494 | 1431 | mutex_unlock(&cdev->lock); |
1da177e4 | 1432 | } |
b8f433dc | 1433 | mutex_unlock(&capidev_list_lock); |
9a58a80a | 1434 | return 0; |
1da177e4 LT |
1435 | } |
1436 | ||
9a58a80a AD |
1437 | static int capi20ncci_proc_open(struct inode *inode, struct file *file) |
1438 | { | |
1439 | return single_open(file, capi20ncci_proc_show, NULL); | |
1440 | } | |
1441 | ||
1442 | static const struct file_operations capi20ncci_proc_fops = { | |
1443 | .owner = THIS_MODULE, | |
1444 | .open = capi20ncci_proc_open, | |
1445 | .read = seq_read, | |
1446 | .llseek = seq_lseek, | |
1447 | .release = single_release, | |
1da177e4 LT |
1448 | }; |
1449 | ||
1450 | static void __init proc_init(void) | |
1451 | { | |
9a58a80a AD |
1452 | proc_create("capi/capi20", 0, NULL, &capi20_proc_fops); |
1453 | proc_create("capi/capi20ncci", 0, NULL, &capi20ncci_proc_fops); | |
1da177e4 LT |
1454 | } |
1455 | ||
1456 | static void __exit proc_exit(void) | |
1457 | { | |
9a58a80a AD |
1458 | remove_proc_entry("capi/capi20", NULL); |
1459 | remove_proc_entry("capi/capi20ncci", NULL); | |
1da177e4 LT |
1460 | } |
1461 | ||
1462 | /* -------- init function and module interface ---------------------- */ | |
1463 | ||
1464 | ||
1da177e4 LT |
1465 | static int __init capi_init(void) |
1466 | { | |
88549d6b | 1467 | const char *compileinfo; |
6d9eac34 | 1468 | int major_ret; |
1da177e4 | 1469 | |
6d9eac34 AM |
1470 | major_ret = register_chrdev(capi_major, "capi20", &capi_fops); |
1471 | if (major_ret < 0) { | |
1da177e4 | 1472 | printk(KERN_ERR "capi20: unable to get major %d\n", capi_major); |
6d9eac34 | 1473 | return major_ret; |
1da177e4 | 1474 | } |
56b22935 | 1475 | capi_class = class_create(THIS_MODULE, "capi"); |
1da177e4 LT |
1476 | if (IS_ERR(capi_class)) { |
1477 | unregister_chrdev(capi_major, "capi20"); | |
1478 | return PTR_ERR(capi_class); | |
1479 | } | |
1480 | ||
a9b12619 | 1481 | device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi"); |
1da177e4 | 1482 | |
1da177e4 | 1483 | if (capinc_tty_init() < 0) { |
d78b0368 | 1484 | device_destroy(capi_class, MKDEV(capi_major, 0)); |
56b22935 | 1485 | class_destroy(capi_class); |
1da177e4 LT |
1486 | unregister_chrdev(capi_major, "capi20"); |
1487 | return -ENOMEM; | |
1488 | } | |
1da177e4 LT |
1489 | |
1490 | proc_init(); | |
1491 | ||
1da177e4 LT |
1492 | #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE) |
1493 | compileinfo = " (middleware+capifs)"; | |
501c87a9 | 1494 | #elif defined(CONFIG_ISDN_CAPI_MIDDLEWARE) |
1da177e4 | 1495 | compileinfo = " (no capifs)"; |
1da177e4 LT |
1496 | #else |
1497 | compileinfo = " (no middleware)"; | |
1498 | #endif | |
88549d6b JK |
1499 | printk(KERN_NOTICE "CAPI 2.0 started up with major %d%s\n", |
1500 | capi_major, compileinfo); | |
1da177e4 LT |
1501 | |
1502 | return 0; | |
1503 | } | |
1504 | ||
1505 | static void __exit capi_exit(void) | |
1506 | { | |
1507 | proc_exit(); | |
1508 | ||
d78b0368 | 1509 | device_destroy(capi_class, MKDEV(capi_major, 0)); |
56b22935 | 1510 | class_destroy(capi_class); |
1da177e4 | 1511 | unregister_chrdev(capi_major, "capi20"); |
1da177e4 | 1512 | |
1da177e4 | 1513 | capinc_tty_exit(); |
1da177e4 LT |
1514 | } |
1515 | ||
1516 | module_init(capi_init); | |
1517 | module_exit(capi_exit); |