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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 | 87 | struct capiminor { |
1da177e4 LT |
88 | struct capincci *nccip; |
89 | unsigned int minor; | |
90926f0e | 90 | struct dentry *capifs_dentry; |
1da177e4 LT |
91 | |
92 | struct capi20_appl *ap; | |
93 | u32 ncci; | |
94 | u16 datahandle; | |
95 | u16 msgid; | |
96 | ||
97 | struct tty_struct *tty; | |
98 | int ttyinstop; | |
99 | int ttyoutstop; | |
100 | struct sk_buff *ttyskb; | |
101 | atomic_t ttyopencount; | |
102 | ||
103 | struct sk_buff_head inqueue; | |
104 | int inbytes; | |
105 | struct sk_buff_head outqueue; | |
106 | int outbytes; | |
107 | ||
108 | /* transmit path */ | |
6aa65472 | 109 | struct list_head ackqueue; |
1da177e4 | 110 | int nack; |
6aa65472 | 111 | spinlock_t ackqlock; |
1da177e4 | 112 | }; |
1da177e4 | 113 | |
053b47ff MB |
114 | /* FIXME: The following lock is a sledgehammer-workaround to a |
115 | * locking issue with the capiminor (and maybe other) data structure(s). | |
116 | * Access to this data is done in a racy way and crashes the machine with | |
117 | * a FritzCard DSL driver; sooner or later. This is a workaround | |
118 | * which trades scalability vs stability, so it doesn't crash the kernel anymore. | |
119 | * The correct (and scalable) fix for the issue seems to require | |
120 | * an API change to the drivers... . */ | |
121 | static DEFINE_SPINLOCK(workaround_lock); | |
122 | ||
1da177e4 | 123 | struct capincci { |
884f5c44 | 124 | struct list_head list; |
1da177e4 LT |
125 | u32 ncci; |
126 | struct capidev *cdev; | |
127 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
128 | struct capiminor *minorp; | |
129 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
130 | }; | |
131 | ||
132 | struct capidev { | |
133 | struct list_head list; | |
134 | struct capi20_appl ap; | |
135 | u16 errcode; | |
136 | unsigned userflags; | |
137 | ||
138 | struct sk_buff_head recvqueue; | |
139 | wait_queue_head_t recvwait; | |
140 | ||
884f5c44 | 141 | struct list_head nccis; |
1da177e4 | 142 | |
05b41494 | 143 | struct mutex lock; |
1da177e4 LT |
144 | }; |
145 | ||
146 | /* -------- global variables ---------------------------------------- */ | |
147 | ||
b8f433dc | 148 | static DEFINE_MUTEX(capidev_list_lock); |
1da177e4 LT |
149 | static LIST_HEAD(capidev_list); |
150 | ||
151 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
501c87a9 | 152 | |
81d17fe5 JK |
153 | static DEFINE_RWLOCK(capiminors_lock); |
154 | static struct capiminor **capiminors; | |
1da177e4 | 155 | |
1da177e4 LT |
156 | /* -------- datahandles --------------------------------------------- */ |
157 | ||
501c87a9 | 158 | static int capiminor_add_ack(struct capiminor *mp, u16 datahandle) |
1da177e4 | 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 | { | |
81d17fe5 JK |
215 | struct capiminor *mp; |
216 | unsigned int minor; | |
1da177e4 LT |
217 | unsigned long flags; |
218 | ||
54f0fad3 | 219 | mp = kzalloc(sizeof(*mp), GFP_KERNEL); |
1da177e4 LT |
220 | if (!mp) { |
221 | printk(KERN_ERR "capi: can't alloc capiminor\n"); | |
222 | return NULL; | |
223 | } | |
224 | ||
1da177e4 LT |
225 | mp->ap = ap; |
226 | mp->ncci = ncci; | |
227 | mp->msgid = 0; | |
228 | atomic_set(&mp->ttyopencount,0); | |
6aa65472 MB |
229 | INIT_LIST_HEAD(&mp->ackqueue); |
230 | spin_lock_init(&mp->ackqlock); | |
1da177e4 LT |
231 | |
232 | skb_queue_head_init(&mp->inqueue); | |
233 | skb_queue_head_init(&mp->outqueue); | |
234 | ||
81d17fe5 JK |
235 | /* Allocate the least unused minor number. */ |
236 | write_lock_irqsave(&capiminors_lock, flags); | |
237 | for (minor = 0; minor < capi_ttyminors; minor++) | |
238 | if (!capiminors[minor]) { | |
239 | capiminors[minor] = mp; | |
240 | break; | |
1da177e4 | 241 | } |
81d17fe5 | 242 | write_unlock_irqrestore(&capiminors_lock, flags); |
1da177e4 | 243 | |
81d17fe5 | 244 | if (minor == capi_ttyminors) { |
1da177e4 | 245 | printk(KERN_NOTICE "capi: out of minors\n"); |
81d17fe5 | 246 | kfree(mp); |
1da177e4 LT |
247 | return NULL; |
248 | } | |
249 | ||
81d17fe5 JK |
250 | mp->minor = minor; |
251 | ||
1da177e4 LT |
252 | return mp; |
253 | } | |
254 | ||
255 | static void capiminor_free(struct capiminor *mp) | |
256 | { | |
257 | unsigned long flags; | |
258 | ||
81d17fe5 JK |
259 | write_lock_irqsave(&capiminors_lock, flags); |
260 | capiminors[mp->minor] = NULL; | |
261 | write_unlock_irqrestore(&capiminors_lock, flags); | |
1da177e4 | 262 | |
d46604e1 | 263 | kfree_skb(mp->ttyskb); |
1da177e4 LT |
264 | mp->ttyskb = NULL; |
265 | skb_queue_purge(&mp->inqueue); | |
266 | skb_queue_purge(&mp->outqueue); | |
267 | capiminor_del_all_ack(mp); | |
268 | kfree(mp); | |
269 | } | |
270 | ||
408b664a | 271 | static struct capiminor *capiminor_find(unsigned int minor) |
1da177e4 | 272 | { |
81d17fe5 | 273 | struct capiminor *mp; |
1da177e4 | 274 | |
81d17fe5 | 275 | if (minor >= capi_ttyminors) |
1da177e4 LT |
276 | return NULL; |
277 | ||
81d17fe5 JK |
278 | read_lock(&capiminors_lock); |
279 | mp = capiminors[minor]; | |
280 | read_unlock(&capiminors_lock); | |
281 | ||
282 | return mp; | |
1da177e4 | 283 | } |
1da177e4 LT |
284 | |
285 | /* -------- struct capincci ----------------------------------------- */ | |
286 | ||
501c87a9 | 287 | static void capincci_alloc_minor(struct capidev *cdev, struct capincci *np) |
1da177e4 | 288 | { |
501c87a9 | 289 | struct capiminor *mp; |
1da177e4 | 290 | |
501c87a9 JK |
291 | if (!(cdev->userflags & CAPIFLAG_HIGHJACKING)) |
292 | return; | |
293 | ||
294 | mp = np->minorp = capiminor_alloc(&cdev->ap, np->ncci); | |
1da177e4 LT |
295 | if (mp) { |
296 | mp->nccip = np; | |
297 | #ifdef _DEBUG_REFCOUNT | |
298 | printk(KERN_DEBUG "set mp->nccip\n"); | |
299 | #endif | |
90926f0e JK |
300 | mp->capifs_dentry = |
301 | capifs_new_ncci(mp->minor, | |
302 | MKDEV(capi_ttymajor, mp->minor)); | |
1da177e4 | 303 | } |
501c87a9 JK |
304 | } |
305 | ||
306 | static void capincci_free_minor(struct capincci *np) | |
307 | { | |
308 | struct capiminor *mp = np->minorp; | |
309 | ||
310 | if (mp) { | |
311 | capifs_free_ncci(mp->capifs_dentry); | |
312 | if (mp->tty) { | |
313 | mp->nccip = NULL; | |
314 | #ifdef _DEBUG_REFCOUNT | |
315 | printk(KERN_DEBUG "reset mp->nccip\n"); | |
316 | #endif | |
317 | tty_hangup(mp->tty); | |
318 | } else { | |
319 | capiminor_free(mp); | |
320 | } | |
321 | } | |
322 | } | |
323 | ||
324 | static inline unsigned int capincci_minor_opencount(struct capincci *np) | |
325 | { | |
326 | struct capiminor *mp = np->minorp; | |
327 | ||
328 | return mp ? atomic_read(&mp->ttyopencount) : 0; | |
329 | } | |
330 | ||
331 | #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
332 | ||
333 | static inline void | |
334 | capincci_alloc_minor(struct capidev *cdev, struct capincci *np) { } | |
335 | static inline void capincci_free_minor(struct capincci *np) { } | |
336 | ||
337 | static inline unsigned int capincci_minor_opencount(struct capincci *np) | |
338 | { | |
339 | return 0; | |
340 | } | |
341 | ||
342 | #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
343 | ||
344 | static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci) | |
345 | { | |
884f5c44 | 346 | struct capincci *np; |
501c87a9 | 347 | |
54f0fad3 | 348 | np = kzalloc(sizeof(*np), GFP_KERNEL); |
501c87a9 JK |
349 | if (!np) |
350 | return NULL; | |
351 | np->ncci = ncci; | |
352 | np->cdev = cdev; | |
353 | ||
354 | capincci_alloc_minor(cdev, np); | |
355 | ||
884f5c44 JK |
356 | list_add_tail(&np->list, &cdev->nccis); |
357 | ||
358 | return np; | |
1da177e4 LT |
359 | } |
360 | ||
361 | static void capincci_free(struct capidev *cdev, u32 ncci) | |
362 | { | |
884f5c44 | 363 | struct capincci *np, *tmp; |
1da177e4 | 364 | |
884f5c44 | 365 | list_for_each_entry_safe(np, tmp, &cdev->nccis, list) |
1da177e4 | 366 | if (ncci == 0xffffffff || np->ncci == ncci) { |
501c87a9 | 367 | capincci_free_minor(np); |
884f5c44 | 368 | list_del(&np->list); |
1da177e4 | 369 | kfree(np); |
1da177e4 | 370 | } |
1da177e4 LT |
371 | } |
372 | ||
373 | static struct capincci *capincci_find(struct capidev *cdev, u32 ncci) | |
374 | { | |
884f5c44 | 375 | struct capincci *np; |
1da177e4 | 376 | |
884f5c44 JK |
377 | list_for_each_entry(np, &cdev->nccis, list) |
378 | if (np->ncci == ncci) | |
379 | return np; | |
380 | return NULL; | |
1da177e4 LT |
381 | } |
382 | ||
1da177e4 LT |
383 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
384 | /* -------- handle data queue --------------------------------------- */ | |
385 | ||
386 | static struct sk_buff * | |
387 | gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb) | |
388 | { | |
389 | struct sk_buff *nskb; | |
390 | nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_ATOMIC); | |
391 | if (nskb) { | |
392 | u16 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4+4+2); | |
393 | unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN); | |
394 | capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN); | |
395 | capimsg_setu16(s, 2, mp->ap->applid); | |
396 | capimsg_setu8 (s, 4, CAPI_DATA_B3); | |
397 | capimsg_setu8 (s, 5, CAPI_RESP); | |
398 | capimsg_setu16(s, 6, mp->msgid++); | |
399 | capimsg_setu32(s, 8, mp->ncci); | |
400 | capimsg_setu16(s, 12, datahandle); | |
401 | } | |
402 | return nskb; | |
403 | } | |
404 | ||
405 | static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb) | |
406 | { | |
407 | struct sk_buff *nskb; | |
408 | int datalen; | |
409 | u16 errcode, datahandle; | |
410 | struct tty_ldisc *ld; | |
411 | ||
412 | datalen = skb->len - CAPIMSG_LEN(skb->data); | |
413 | if (mp->tty == NULL) | |
414 | { | |
415 | #ifdef _DEBUG_DATAFLOW | |
416 | printk(KERN_DEBUG "capi: currently no receiver\n"); | |
417 | #endif | |
418 | return -1; | |
419 | } | |
420 | ||
421 | ld = tty_ldisc_ref(mp->tty); | |
422 | if (ld == NULL) | |
423 | return -1; | |
a352def2 | 424 | if (ld->ops->receive_buf == NULL) { |
1da177e4 LT |
425 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) |
426 | printk(KERN_DEBUG "capi: ldisc has no receive_buf function\n"); | |
427 | #endif | |
428 | goto bad; | |
429 | } | |
430 | if (mp->ttyinstop) { | |
431 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) | |
432 | printk(KERN_DEBUG "capi: recv tty throttled\n"); | |
433 | #endif | |
434 | goto bad; | |
435 | } | |
33f0f88f | 436 | if (mp->tty->receive_room < datalen) { |
1da177e4 LT |
437 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) |
438 | printk(KERN_DEBUG "capi: no room in tty\n"); | |
439 | #endif | |
440 | goto bad; | |
441 | } | |
2f9e9b6d | 442 | if ((nskb = gen_data_b3_resp_for(mp, skb)) == NULL) { |
1da177e4 LT |
443 | printk(KERN_ERR "capi: gen_data_b3_resp failed\n"); |
444 | goto bad; | |
445 | } | |
446 | datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4); | |
447 | errcode = capi20_put_message(mp->ap, nskb); | |
448 | if (errcode != CAPI_NOERROR) { | |
449 | printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n", | |
450 | errcode); | |
451 | kfree_skb(nskb); | |
452 | goto bad; | |
453 | } | |
454 | (void)skb_pull(skb, CAPIMSG_LEN(skb->data)); | |
455 | #ifdef _DEBUG_DATAFLOW | |
456 | printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldisc\n", | |
457 | datahandle, skb->len); | |
458 | #endif | |
a352def2 | 459 | ld->ops->receive_buf(mp->tty, skb->data, NULL, skb->len); |
1da177e4 LT |
460 | kfree_skb(skb); |
461 | tty_ldisc_deref(ld); | |
462 | return 0; | |
463 | bad: | |
464 | tty_ldisc_deref(ld); | |
465 | return -1; | |
466 | } | |
467 | ||
468 | static void handle_minor_recv(struct capiminor *mp) | |
469 | { | |
470 | struct sk_buff *skb; | |
2f9e9b6d | 471 | while ((skb = skb_dequeue(&mp->inqueue)) != NULL) { |
1da177e4 LT |
472 | unsigned int len = skb->len; |
473 | mp->inbytes -= len; | |
474 | if (handle_recv_skb(mp, skb) < 0) { | |
475 | skb_queue_head(&mp->inqueue, skb); | |
476 | mp->inbytes += len; | |
477 | return; | |
478 | } | |
479 | } | |
480 | } | |
481 | ||
482 | static int handle_minor_send(struct capiminor *mp) | |
483 | { | |
484 | struct sk_buff *skb; | |
485 | u16 len; | |
486 | int count = 0; | |
487 | u16 errcode; | |
488 | u16 datahandle; | |
489 | ||
490 | if (mp->tty && mp->ttyoutstop) { | |
491 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) | |
492 | printk(KERN_DEBUG "capi: send: tty stopped\n"); | |
493 | #endif | |
494 | return 0; | |
495 | } | |
496 | ||
2f9e9b6d | 497 | while ((skb = skb_dequeue(&mp->outqueue)) != NULL) { |
1da177e4 LT |
498 | datahandle = mp->datahandle; |
499 | len = (u16)skb->len; | |
500 | skb_push(skb, CAPI_DATA_B3_REQ_LEN); | |
501 | memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN); | |
502 | capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN); | |
503 | capimsg_setu16(skb->data, 2, mp->ap->applid); | |
504 | capimsg_setu8 (skb->data, 4, CAPI_DATA_B3); | |
505 | capimsg_setu8 (skb->data, 5, CAPI_REQ); | |
506 | capimsg_setu16(skb->data, 6, mp->msgid++); | |
507 | capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */ | |
5e6c20a9 | 508 | capimsg_setu32(skb->data, 12, (u32)(long)skb->data);/* Data32 */ |
1da177e4 LT |
509 | capimsg_setu16(skb->data, 16, len); /* Data length */ |
510 | capimsg_setu16(skb->data, 18, datahandle); | |
511 | capimsg_setu16(skb->data, 20, 0); /* Flags */ | |
512 | ||
501c87a9 | 513 | if (capiminor_add_ack(mp, datahandle) < 0) { |
1da177e4 LT |
514 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); |
515 | skb_queue_head(&mp->outqueue, skb); | |
516 | return count; | |
517 | } | |
518 | errcode = capi20_put_message(mp->ap, skb); | |
519 | if (errcode == CAPI_NOERROR) { | |
520 | mp->datahandle++; | |
521 | count++; | |
522 | mp->outbytes -= len; | |
523 | #ifdef _DEBUG_DATAFLOW | |
524 | printk(KERN_DEBUG "capi: DATA_B3_REQ %u len=%u\n", | |
525 | datahandle, len); | |
526 | #endif | |
527 | continue; | |
528 | } | |
529 | capiminor_del_ack(mp, datahandle); | |
530 | ||
531 | if (errcode == CAPI_SENDQUEUEFULL) { | |
532 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); | |
533 | skb_queue_head(&mp->outqueue, skb); | |
534 | break; | |
535 | } | |
536 | ||
537 | /* ups, drop packet */ | |
538 | printk(KERN_ERR "capi: put_message = %x\n", errcode); | |
539 | mp->outbytes -= len; | |
540 | kfree_skb(skb); | |
541 | } | |
542 | return count; | |
543 | } | |
544 | ||
545 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
546 | /* -------- function called by lower level -------------------------- */ | |
547 | ||
548 | static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb) | |
549 | { | |
550 | struct capidev *cdev = ap->private; | |
551 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
552 | struct capiminor *mp; | |
553 | u16 datahandle; | |
554 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
555 | struct capincci *np; | |
053b47ff | 556 | unsigned long flags; |
1da177e4 | 557 | |
05b41494 JK |
558 | mutex_lock(&cdev->lock); |
559 | ||
1da177e4 LT |
560 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) { |
561 | u16 info = CAPIMSG_U16(skb->data, 12); // Info field | |
05b41494 | 562 | if ((info & 0xff00) == 0) |
1da177e4 | 563 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); |
1da177e4 | 564 | } |
05b41494 | 565 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) |
1da177e4 | 566 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); |
05b41494 | 567 | |
053b47ff | 568 | spin_lock_irqsave(&workaround_lock, flags); |
1da177e4 LT |
569 | if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) { |
570 | skb_queue_tail(&cdev->recvqueue, skb); | |
571 | wake_up_interruptible(&cdev->recvwait); | |
05b41494 | 572 | goto unlock_out; |
1da177e4 | 573 | } |
05b41494 JK |
574 | |
575 | np = capincci_find(cdev, CAPIMSG_CONTROL(skb->data)); | |
1da177e4 LT |
576 | if (!np) { |
577 | printk(KERN_ERR "BUG: capi_signal: ncci not found\n"); | |
578 | skb_queue_tail(&cdev->recvqueue, skb); | |
579 | wake_up_interruptible(&cdev->recvwait); | |
05b41494 | 580 | goto unlock_out; |
1da177e4 | 581 | } |
501c87a9 | 582 | |
1da177e4 LT |
583 | #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE |
584 | skb_queue_tail(&cdev->recvqueue, skb); | |
585 | wake_up_interruptible(&cdev->recvwait); | |
501c87a9 | 586 | |
1da177e4 | 587 | #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
501c87a9 | 588 | |
1da177e4 LT |
589 | mp = np->minorp; |
590 | if (!mp) { | |
591 | skb_queue_tail(&cdev->recvqueue, skb); | |
592 | wake_up_interruptible(&cdev->recvwait); | |
05b41494 | 593 | goto unlock_out; |
1da177e4 | 594 | } |
1da177e4 | 595 | if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) { |
1da177e4 LT |
596 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+4+2); |
597 | #ifdef _DEBUG_DATAFLOW | |
598 | printk(KERN_DEBUG "capi_signal: DATA_B3_IND %u len=%d\n", | |
599 | datahandle, skb->len-CAPIMSG_LEN(skb->data)); | |
600 | #endif | |
601 | skb_queue_tail(&mp->inqueue, skb); | |
602 | mp->inbytes += skb->len; | |
603 | handle_minor_recv(mp); | |
604 | ||
605 | } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) { | |
606 | ||
607 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4); | |
608 | #ifdef _DEBUG_DATAFLOW | |
609 | printk(KERN_DEBUG "capi_signal: DATA_B3_CONF %u 0x%x\n", | |
610 | datahandle, | |
611 | CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+2)); | |
612 | #endif | |
613 | kfree_skb(skb); | |
614 | (void)capiminor_del_ack(mp, datahandle); | |
615 | if (mp->tty) | |
616 | tty_wakeup(mp->tty); | |
617 | (void)handle_minor_send(mp); | |
618 | ||
619 | } else { | |
620 | /* ups, let capi application handle it :-) */ | |
621 | skb_queue_tail(&cdev->recvqueue, skb); | |
622 | wake_up_interruptible(&cdev->recvwait); | |
623 | } | |
624 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
501c87a9 | 625 | |
05b41494 | 626 | unlock_out: |
053b47ff | 627 | spin_unlock_irqrestore(&workaround_lock, flags); |
05b41494 | 628 | mutex_unlock(&cdev->lock); |
1da177e4 LT |
629 | } |
630 | ||
631 | /* -------- file_operations for capidev ----------------------------- */ | |
632 | ||
633 | static ssize_t | |
634 | capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
635 | { | |
636 | struct capidev *cdev = (struct capidev *)file->private_data; | |
637 | struct sk_buff *skb; | |
638 | size_t copied; | |
28a1dbb6 | 639 | int err; |
1da177e4 LT |
640 | |
641 | if (!cdev->ap.applid) | |
642 | return -ENODEV; | |
643 | ||
28a1dbb6 JK |
644 | skb = skb_dequeue(&cdev->recvqueue); |
645 | if (!skb) { | |
1da177e4 LT |
646 | if (file->f_flags & O_NONBLOCK) |
647 | return -EAGAIN; | |
28a1dbb6 JK |
648 | err = wait_event_interruptible(cdev->recvwait, |
649 | (skb = skb_dequeue(&cdev->recvqueue))); | |
650 | if (err) | |
651 | return err; | |
1da177e4 LT |
652 | } |
653 | if (skb->len > count) { | |
654 | skb_queue_head(&cdev->recvqueue, skb); | |
655 | return -EMSGSIZE; | |
656 | } | |
657 | if (copy_to_user(buf, skb->data, skb->len)) { | |
658 | skb_queue_head(&cdev->recvqueue, skb); | |
659 | return -EFAULT; | |
660 | } | |
661 | copied = skb->len; | |
662 | ||
663 | kfree_skb(skb); | |
664 | ||
665 | return copied; | |
666 | } | |
667 | ||
668 | static ssize_t | |
669 | capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
670 | { | |
671 | struct capidev *cdev = (struct capidev *)file->private_data; | |
672 | struct sk_buff *skb; | |
673 | u16 mlen; | |
674 | ||
675 | if (!cdev->ap.applid) | |
676 | return -ENODEV; | |
677 | ||
678 | skb = alloc_skb(count, GFP_USER); | |
679 | if (!skb) | |
680 | return -ENOMEM; | |
681 | ||
682 | if (copy_from_user(skb_put(skb, count), buf, count)) { | |
683 | kfree_skb(skb); | |
684 | return -EFAULT; | |
685 | } | |
686 | mlen = CAPIMSG_LEN(skb->data); | |
687 | if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) { | |
688 | if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) { | |
689 | kfree_skb(skb); | |
690 | return -EINVAL; | |
691 | } | |
692 | } else { | |
693 | if (mlen != count) { | |
694 | kfree_skb(skb); | |
695 | return -EINVAL; | |
696 | } | |
697 | } | |
698 | CAPIMSG_SETAPPID(skb->data, cdev->ap.applid); | |
699 | ||
700 | if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) { | |
05b41494 | 701 | mutex_lock(&cdev->lock); |
1da177e4 | 702 | capincci_free(cdev, CAPIMSG_NCCI(skb->data)); |
05b41494 | 703 | mutex_unlock(&cdev->lock); |
1da177e4 LT |
704 | } |
705 | ||
706 | cdev->errcode = capi20_put_message(&cdev->ap, skb); | |
707 | ||
708 | if (cdev->errcode) { | |
709 | kfree_skb(skb); | |
710 | return -EIO; | |
711 | } | |
712 | return count; | |
713 | } | |
714 | ||
715 | static unsigned int | |
716 | capi_poll(struct file *file, poll_table * wait) | |
717 | { | |
718 | struct capidev *cdev = (struct capidev *)file->private_data; | |
719 | unsigned int mask = 0; | |
720 | ||
721 | if (!cdev->ap.applid) | |
722 | return POLLERR; | |
723 | ||
724 | poll_wait(file, &(cdev->recvwait), wait); | |
725 | mask = POLLOUT | POLLWRNORM; | |
726 | if (!skb_queue_empty(&cdev->recvqueue)) | |
727 | mask |= POLLIN | POLLRDNORM; | |
728 | return mask; | |
729 | } | |
730 | ||
731 | static int | |
732 | capi_ioctl(struct inode *inode, struct file *file, | |
733 | unsigned int cmd, unsigned long arg) | |
734 | { | |
735 | struct capidev *cdev = file->private_data; | |
1da177e4 LT |
736 | capi_ioctl_struct data; |
737 | int retval = -EINVAL; | |
738 | void __user *argp = (void __user *)arg; | |
739 | ||
740 | switch (cmd) { | |
741 | case CAPI_REGISTER: | |
05b41494 | 742 | mutex_lock(&cdev->lock); |
1da177e4 | 743 | |
05b41494 JK |
744 | if (cdev->ap.applid) { |
745 | retval = -EEXIST; | |
746 | goto register_out; | |
747 | } | |
748 | if (copy_from_user(&cdev->ap.rparam, argp, | |
749 | sizeof(struct capi_register_params))) { | |
750 | retval = -EFAULT; | |
751 | goto register_out; | |
752 | } | |
753 | cdev->ap.private = cdev; | |
754 | cdev->ap.recv_message = capi_recv_message; | |
755 | cdev->errcode = capi20_register(&cdev->ap); | |
756 | retval = (int)cdev->ap.applid; | |
757 | if (cdev->errcode) { | |
758 | cdev->ap.applid = 0; | |
759 | retval = -EIO; | |
1da177e4 | 760 | } |
05b41494 JK |
761 | |
762 | register_out: | |
763 | mutex_unlock(&cdev->lock); | |
764 | return retval; | |
1da177e4 LT |
765 | |
766 | case CAPI_GET_VERSION: | |
767 | { | |
768 | if (copy_from_user(&data.contr, argp, | |
769 | sizeof(data.contr))) | |
770 | return -EFAULT; | |
771 | cdev->errcode = capi20_get_version(data.contr, &data.version); | |
772 | if (cdev->errcode) | |
773 | return -EIO; | |
774 | if (copy_to_user(argp, &data.version, | |
775 | sizeof(data.version))) | |
776 | return -EFAULT; | |
777 | } | |
778 | return 0; | |
779 | ||
780 | case CAPI_GET_SERIAL: | |
781 | { | |
782 | if (copy_from_user(&data.contr, argp, | |
783 | sizeof(data.contr))) | |
784 | return -EFAULT; | |
785 | cdev->errcode = capi20_get_serial (data.contr, data.serial); | |
786 | if (cdev->errcode) | |
787 | return -EIO; | |
788 | if (copy_to_user(argp, data.serial, | |
789 | sizeof(data.serial))) | |
790 | return -EFAULT; | |
791 | } | |
792 | return 0; | |
793 | case CAPI_GET_PROFILE: | |
794 | { | |
795 | if (copy_from_user(&data.contr, argp, | |
796 | sizeof(data.contr))) | |
797 | return -EFAULT; | |
798 | ||
799 | if (data.contr == 0) { | |
800 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); | |
801 | if (cdev->errcode) | |
802 | return -EIO; | |
803 | ||
804 | retval = copy_to_user(argp, | |
805 | &data.profile.ncontroller, | |
806 | sizeof(data.profile.ncontroller)); | |
807 | ||
808 | } else { | |
809 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); | |
810 | if (cdev->errcode) | |
811 | return -EIO; | |
812 | ||
813 | retval = copy_to_user(argp, &data.profile, | |
814 | sizeof(data.profile)); | |
815 | } | |
816 | if (retval) | |
817 | return -EFAULT; | |
818 | } | |
819 | return 0; | |
820 | ||
821 | case CAPI_GET_MANUFACTURER: | |
822 | { | |
823 | if (copy_from_user(&data.contr, argp, | |
824 | sizeof(data.contr))) | |
825 | return -EFAULT; | |
826 | cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer); | |
827 | if (cdev->errcode) | |
828 | return -EIO; | |
829 | ||
830 | if (copy_to_user(argp, data.manufacturer, | |
831 | sizeof(data.manufacturer))) | |
832 | return -EFAULT; | |
833 | ||
834 | } | |
835 | return 0; | |
836 | case CAPI_GET_ERRCODE: | |
837 | data.errcode = cdev->errcode; | |
838 | cdev->errcode = CAPI_NOERROR; | |
839 | if (arg) { | |
840 | if (copy_to_user(argp, &data.errcode, | |
841 | sizeof(data.errcode))) | |
842 | return -EFAULT; | |
843 | } | |
844 | return data.errcode; | |
845 | ||
846 | case CAPI_INSTALLED: | |
847 | if (capi20_isinstalled() == CAPI_NOERROR) | |
848 | return 0; | |
849 | return -ENXIO; | |
850 | ||
851 | case CAPI_MANUFACTURER_CMD: | |
852 | { | |
853 | struct capi_manufacturer_cmd mcmd; | |
854 | if (!capable(CAP_SYS_ADMIN)) | |
855 | return -EPERM; | |
856 | if (copy_from_user(&mcmd, argp, sizeof(mcmd))) | |
857 | return -EFAULT; | |
858 | return capi20_manufacturer(mcmd.cmd, mcmd.data); | |
859 | } | |
860 | return 0; | |
861 | ||
862 | case CAPI_SET_FLAGS: | |
05b41494 JK |
863 | case CAPI_CLR_FLAGS: { |
864 | unsigned userflags; | |
865 | ||
866 | if (copy_from_user(&userflags, argp, sizeof(userflags))) | |
867 | return -EFAULT; | |
1da177e4 | 868 | |
05b41494 JK |
869 | mutex_lock(&cdev->lock); |
870 | if (cmd == CAPI_SET_FLAGS) | |
871 | cdev->userflags |= userflags; | |
872 | else | |
873 | cdev->userflags &= ~userflags; | |
874 | mutex_unlock(&cdev->lock); | |
875 | return 0; | |
876 | } | |
1da177e4 LT |
877 | case CAPI_GET_FLAGS: |
878 | if (copy_to_user(argp, &cdev->userflags, | |
879 | sizeof(cdev->userflags))) | |
880 | return -EFAULT; | |
881 | return 0; | |
882 | ||
05b41494 JK |
883 | case CAPI_NCCI_OPENCOUNT: { |
884 | struct capincci *nccip; | |
885 | unsigned ncci; | |
886 | int count = 0; | |
1da177e4 | 887 | |
05b41494 JK |
888 | if (copy_from_user(&ncci, argp, sizeof(ncci))) |
889 | return -EFAULT; | |
890 | ||
891 | mutex_lock(&cdev->lock); | |
892 | nccip = capincci_find(cdev, (u32)ncci); | |
893 | if (nccip) | |
894 | count = capincci_minor_opencount(nccip); | |
895 | mutex_unlock(&cdev->lock); | |
896 | return count; | |
897 | } | |
1da177e4 LT |
898 | |
899 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
05b41494 JK |
900 | case CAPI_NCCI_GETUNIT: { |
901 | struct capincci *nccip; | |
902 | struct capiminor *mp; | |
903 | unsigned ncci; | |
904 | int unit = -ESRCH; | |
905 | ||
906 | if (copy_from_user(&ncci, argp, sizeof(ncci))) | |
907 | return -EFAULT; | |
908 | ||
909 | mutex_lock(&cdev->lock); | |
910 | nccip = capincci_find(cdev, (u32)ncci); | |
911 | if (nccip) { | |
912 | mp = nccip->minorp; | |
913 | if (mp) | |
914 | unit = mp->minor; | |
1da177e4 | 915 | } |
05b41494 JK |
916 | mutex_unlock(&cdev->lock); |
917 | return unit; | |
918 | } | |
1da177e4 | 919 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
05b41494 JK |
920 | |
921 | default: | |
922 | return -EINVAL; | |
1da177e4 | 923 | } |
1da177e4 LT |
924 | } |
925 | ||
eca39dd8 | 926 | static int capi_open(struct inode *inode, struct file *file) |
1da177e4 | 927 | { |
eca39dd8 JK |
928 | struct capidev *cdev; |
929 | ||
930 | cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); | |
931 | if (!cdev) | |
932 | return -ENOMEM; | |
933 | ||
05b41494 | 934 | mutex_init(&cdev->lock); |
eca39dd8 JK |
935 | skb_queue_head_init(&cdev->recvqueue); |
936 | init_waitqueue_head(&cdev->recvwait); | |
884f5c44 | 937 | INIT_LIST_HEAD(&cdev->nccis); |
eca39dd8 JK |
938 | file->private_data = cdev; |
939 | ||
940 | mutex_lock(&capidev_list_lock); | |
941 | list_add_tail(&cdev->list, &capidev_list); | |
942 | mutex_unlock(&capidev_list_lock); | |
943 | ||
944 | return nonseekable_open(inode, file); | |
1da177e4 LT |
945 | } |
946 | ||
eca39dd8 | 947 | static int capi_release(struct inode *inode, struct file *file) |
1da177e4 | 948 | { |
eca39dd8 | 949 | struct capidev *cdev = file->private_data; |
1da177e4 | 950 | |
eca39dd8 JK |
951 | mutex_lock(&capidev_list_lock); |
952 | list_del(&cdev->list); | |
953 | mutex_unlock(&capidev_list_lock); | |
954 | ||
05b41494 | 955 | if (cdev->ap.applid) |
eca39dd8 | 956 | capi20_release(&cdev->ap); |
eca39dd8 | 957 | skb_queue_purge(&cdev->recvqueue); |
eca39dd8 | 958 | capincci_free(cdev, 0xffffffff); |
eca39dd8 JK |
959 | |
960 | kfree(cdev); | |
1da177e4 LT |
961 | return 0; |
962 | } | |
963 | ||
2b8693c0 | 964 | static const struct file_operations capi_fops = |
1da177e4 LT |
965 | { |
966 | .owner = THIS_MODULE, | |
967 | .llseek = no_llseek, | |
968 | .read = capi_read, | |
969 | .write = capi_write, | |
970 | .poll = capi_poll, | |
971 | .ioctl = capi_ioctl, | |
972 | .open = capi_open, | |
973 | .release = capi_release, | |
974 | }; | |
975 | ||
976 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
977 | /* -------- tty_operations for capincci ----------------------------- */ | |
978 | ||
979 | static int capinc_tty_open(struct tty_struct * tty, struct file * file) | |
980 | { | |
981 | struct capiminor *mp; | |
053b47ff | 982 | unsigned long flags; |
1da177e4 | 983 | |
2f9e9b6d | 984 | if ((mp = capiminor_find(iminor(file->f_path.dentry->d_inode))) == NULL) |
1da177e4 | 985 | return -ENXIO; |
2f9e9b6d | 986 | if (mp->nccip == NULL) |
1da177e4 LT |
987 | return -ENXIO; |
988 | ||
989 | tty->driver_data = (void *)mp; | |
990 | ||
053b47ff | 991 | spin_lock_irqsave(&workaround_lock, flags); |
1da177e4 LT |
992 | if (atomic_read(&mp->ttyopencount) == 0) |
993 | mp->tty = tty; | |
994 | atomic_inc(&mp->ttyopencount); | |
995 | #ifdef _DEBUG_REFCOUNT | |
996 | printk(KERN_DEBUG "capinc_tty_open ocount=%d\n", atomic_read(&mp->ttyopencount)); | |
997 | #endif | |
998 | handle_minor_recv(mp); | |
053b47ff | 999 | spin_unlock_irqrestore(&workaround_lock, flags); |
1da177e4 LT |
1000 | return 0; |
1001 | } | |
1002 | ||
1003 | static void capinc_tty_close(struct tty_struct * tty, struct file * file) | |
1004 | { | |
1005 | struct capiminor *mp; | |
1006 | ||
1007 | mp = (struct capiminor *)tty->driver_data; | |
1008 | if (mp) { | |
1009 | if (atomic_dec_and_test(&mp->ttyopencount)) { | |
1010 | #ifdef _DEBUG_REFCOUNT | |
1011 | printk(KERN_DEBUG "capinc_tty_close lastclose\n"); | |
1012 | #endif | |
1013 | tty->driver_data = NULL; | |
1014 | mp->tty = NULL; | |
1015 | } | |
1016 | #ifdef _DEBUG_REFCOUNT | |
1017 | printk(KERN_DEBUG "capinc_tty_close ocount=%d\n", atomic_read(&mp->ttyopencount)); | |
1018 | #endif | |
2f9e9b6d | 1019 | if (mp->nccip == NULL) |
1da177e4 LT |
1020 | capiminor_free(mp); |
1021 | } | |
1022 | ||
1023 | #ifdef _DEBUG_REFCOUNT | |
1024 | printk(KERN_DEBUG "capinc_tty_close\n"); | |
1025 | #endif | |
1026 | } | |
1027 | ||
1028 | static int capinc_tty_write(struct tty_struct * tty, | |
1029 | const unsigned char *buf, int count) | |
1030 | { | |
1031 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1032 | struct sk_buff *skb; | |
053b47ff | 1033 | unsigned long flags; |
1da177e4 LT |
1034 | |
1035 | #ifdef _DEBUG_TTYFUNCS | |
1036 | printk(KERN_DEBUG "capinc_tty_write(count=%d)\n", count); | |
1037 | #endif | |
1038 | ||
1039 | if (!mp || !mp->nccip) { | |
1040 | #ifdef _DEBUG_TTYFUNCS | |
1041 | printk(KERN_DEBUG "capinc_tty_write: mp or mp->ncci NULL\n"); | |
1042 | #endif | |
1043 | return 0; | |
1044 | } | |
1045 | ||
053b47ff | 1046 | spin_lock_irqsave(&workaround_lock, flags); |
1da177e4 LT |
1047 | skb = mp->ttyskb; |
1048 | if (skb) { | |
1049 | mp->ttyskb = NULL; | |
1050 | skb_queue_tail(&mp->outqueue, skb); | |
1051 | mp->outbytes += skb->len; | |
1052 | } | |
1053 | ||
1054 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC); | |
1055 | if (!skb) { | |
1056 | printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n"); | |
053b47ff | 1057 | spin_unlock_irqrestore(&workaround_lock, flags); |
1da177e4 LT |
1058 | return -ENOMEM; |
1059 | } | |
1060 | ||
1061 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); | |
1062 | memcpy(skb_put(skb, count), buf, count); | |
1063 | ||
1064 | skb_queue_tail(&mp->outqueue, skb); | |
1065 | mp->outbytes += skb->len; | |
1066 | (void)handle_minor_send(mp); | |
1067 | (void)handle_minor_recv(mp); | |
053b47ff | 1068 | spin_unlock_irqrestore(&workaround_lock, flags); |
1da177e4 LT |
1069 | return count; |
1070 | } | |
1071 | ||
f2545a75 | 1072 | static int capinc_tty_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 LT |
1073 | { |
1074 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1075 | struct sk_buff *skb; | |
053b47ff | 1076 | unsigned long flags; |
f2545a75 | 1077 | int ret = 1; |
1da177e4 LT |
1078 | |
1079 | #ifdef _DEBUG_TTYFUNCS | |
1080 | printk(KERN_DEBUG "capinc_put_char(%u)\n", ch); | |
1081 | #endif | |
1082 | ||
1083 | if (!mp || !mp->nccip) { | |
1084 | #ifdef _DEBUG_TTYFUNCS | |
1085 | printk(KERN_DEBUG "capinc_tty_put_char: mp or mp->ncci NULL\n"); | |
1086 | #endif | |
f2545a75 | 1087 | return 0; |
1da177e4 LT |
1088 | } |
1089 | ||
053b47ff | 1090 | spin_lock_irqsave(&workaround_lock, flags); |
1da177e4 LT |
1091 | skb = mp->ttyskb; |
1092 | if (skb) { | |
1093 | if (skb_tailroom(skb) > 0) { | |
1094 | *(skb_put(skb, 1)) = ch; | |
053b47ff | 1095 | spin_unlock_irqrestore(&workaround_lock, flags); |
f2545a75 | 1096 | return 1; |
1da177e4 LT |
1097 | } |
1098 | mp->ttyskb = NULL; | |
1099 | skb_queue_tail(&mp->outqueue, skb); | |
1100 | mp->outbytes += skb->len; | |
1101 | (void)handle_minor_send(mp); | |
1102 | } | |
1103 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+CAPI_MAX_BLKSIZE, GFP_ATOMIC); | |
1104 | if (skb) { | |
1105 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); | |
1106 | *(skb_put(skb, 1)) = ch; | |
1107 | mp->ttyskb = skb; | |
1108 | } else { | |
1109 | printk(KERN_ERR "capinc_put_char: char %u lost\n", ch); | |
f2545a75 | 1110 | ret = 0; |
1da177e4 | 1111 | } |
053b47ff | 1112 | spin_unlock_irqrestore(&workaround_lock, flags); |
f2545a75 | 1113 | return ret; |
1da177e4 LT |
1114 | } |
1115 | ||
1116 | static void capinc_tty_flush_chars(struct tty_struct *tty) | |
1117 | { | |
1118 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1119 | struct sk_buff *skb; | |
053b47ff | 1120 | unsigned long flags; |
1da177e4 LT |
1121 | |
1122 | #ifdef _DEBUG_TTYFUNCS | |
1123 | printk(KERN_DEBUG "capinc_tty_flush_chars\n"); | |
1124 | #endif | |
1125 | ||
1126 | if (!mp || !mp->nccip) { | |
1127 | #ifdef _DEBUG_TTYFUNCS | |
1128 | printk(KERN_DEBUG "capinc_tty_flush_chars: mp or mp->ncci NULL\n"); | |
1129 | #endif | |
1130 | return; | |
1131 | } | |
1132 | ||
053b47ff | 1133 | spin_lock_irqsave(&workaround_lock, flags); |
1da177e4 LT |
1134 | skb = mp->ttyskb; |
1135 | if (skb) { | |
1136 | mp->ttyskb = NULL; | |
1137 | skb_queue_tail(&mp->outqueue, skb); | |
1138 | mp->outbytes += skb->len; | |
1139 | (void)handle_minor_send(mp); | |
1140 | } | |
1141 | (void)handle_minor_recv(mp); | |
053b47ff | 1142 | spin_unlock_irqrestore(&workaround_lock, flags); |
1da177e4 LT |
1143 | } |
1144 | ||
1145 | static int capinc_tty_write_room(struct tty_struct *tty) | |
1146 | { | |
1147 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1148 | int room; | |
1149 | if (!mp || !mp->nccip) { | |
1150 | #ifdef _DEBUG_TTYFUNCS | |
1151 | printk(KERN_DEBUG "capinc_tty_write_room: mp or mp->ncci NULL\n"); | |
1152 | #endif | |
1153 | return 0; | |
1154 | } | |
1155 | room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue); | |
1156 | room *= CAPI_MAX_BLKSIZE; | |
1157 | #ifdef _DEBUG_TTYFUNCS | |
1158 | printk(KERN_DEBUG "capinc_tty_write_room = %d\n", room); | |
1159 | #endif | |
1160 | return room; | |
1161 | } | |
1162 | ||
408b664a | 1163 | static int capinc_tty_chars_in_buffer(struct tty_struct *tty) |
1da177e4 LT |
1164 | { |
1165 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1166 | if (!mp || !mp->nccip) { | |
1167 | #ifdef _DEBUG_TTYFUNCS | |
1168 | printk(KERN_DEBUG "capinc_tty_chars_in_buffer: mp or mp->ncci NULL\n"); | |
1169 | #endif | |
1170 | return 0; | |
1171 | } | |
1172 | #ifdef _DEBUG_TTYFUNCS | |
1173 | printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n", | |
1174 | mp->outbytes, mp->nack, | |
1175 | skb_queue_len(&mp->outqueue), | |
1176 | skb_queue_len(&mp->inqueue)); | |
1177 | #endif | |
1178 | return mp->outbytes; | |
1179 | } | |
1180 | ||
1181 | static int capinc_tty_ioctl(struct tty_struct *tty, struct file * file, | |
1182 | unsigned int cmd, unsigned long arg) | |
1183 | { | |
1184 | int error = 0; | |
1185 | switch (cmd) { | |
1186 | default: | |
53e86317 | 1187 | error = n_tty_ioctl_helper(tty, file, cmd, arg); |
1da177e4 LT |
1188 | break; |
1189 | } | |
1190 | return error; | |
1191 | } | |
1192 | ||
606d099c | 1193 | static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios * old) |
1da177e4 LT |
1194 | { |
1195 | #ifdef _DEBUG_TTYFUNCS | |
1196 | printk(KERN_DEBUG "capinc_tty_set_termios\n"); | |
1197 | #endif | |
1198 | } | |
1199 | ||
1200 | static void capinc_tty_throttle(struct tty_struct * tty) | |
1201 | { | |
1202 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1203 | #ifdef _DEBUG_TTYFUNCS | |
1204 | printk(KERN_DEBUG "capinc_tty_throttle\n"); | |
1205 | #endif | |
1206 | if (mp) | |
1207 | mp->ttyinstop = 1; | |
1208 | } | |
1209 | ||
1210 | static void capinc_tty_unthrottle(struct tty_struct * tty) | |
1211 | { | |
1212 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
053b47ff | 1213 | unsigned long flags; |
1da177e4 LT |
1214 | #ifdef _DEBUG_TTYFUNCS |
1215 | printk(KERN_DEBUG "capinc_tty_unthrottle\n"); | |
1216 | #endif | |
1217 | if (mp) { | |
053b47ff | 1218 | spin_lock_irqsave(&workaround_lock, flags); |
1da177e4 LT |
1219 | mp->ttyinstop = 0; |
1220 | handle_minor_recv(mp); | |
053b47ff | 1221 | spin_unlock_irqrestore(&workaround_lock, flags); |
1da177e4 LT |
1222 | } |
1223 | } | |
1224 | ||
1225 | static void capinc_tty_stop(struct tty_struct *tty) | |
1226 | { | |
1227 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
1228 | #ifdef _DEBUG_TTYFUNCS | |
1229 | printk(KERN_DEBUG "capinc_tty_stop\n"); | |
1230 | #endif | |
1231 | if (mp) { | |
1232 | mp->ttyoutstop = 1; | |
1233 | } | |
1234 | } | |
1235 | ||
1236 | static void capinc_tty_start(struct tty_struct *tty) | |
1237 | { | |
1238 | struct capiminor *mp = (struct capiminor *)tty->driver_data; | |
053b47ff | 1239 | unsigned long flags; |
1da177e4 LT |
1240 | #ifdef _DEBUG_TTYFUNCS |
1241 | printk(KERN_DEBUG "capinc_tty_start\n"); | |
1242 | #endif | |
1243 | if (mp) { | |
053b47ff | 1244 | spin_lock_irqsave(&workaround_lock, flags); |
1da177e4 LT |
1245 | mp->ttyoutstop = 0; |
1246 | (void)handle_minor_send(mp); | |
053b47ff | 1247 | spin_unlock_irqrestore(&workaround_lock, flags); |
1da177e4 LT |
1248 | } |
1249 | } | |
1250 | ||
1251 | static void capinc_tty_hangup(struct tty_struct *tty) | |
1252 | { | |
1253 | #ifdef _DEBUG_TTYFUNCS | |
1254 | printk(KERN_DEBUG "capinc_tty_hangup\n"); | |
1255 | #endif | |
1256 | } | |
1257 | ||
9e98966c | 1258 | static int capinc_tty_break_ctl(struct tty_struct *tty, int state) |
1da177e4 LT |
1259 | { |
1260 | #ifdef _DEBUG_TTYFUNCS | |
1261 | printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state); | |
1262 | #endif | |
9e98966c | 1263 | return 0; |
1da177e4 LT |
1264 | } |
1265 | ||
1266 | static void capinc_tty_flush_buffer(struct tty_struct *tty) | |
1267 | { | |
1268 | #ifdef _DEBUG_TTYFUNCS | |
1269 | printk(KERN_DEBUG "capinc_tty_flush_buffer\n"); | |
1270 | #endif | |
1271 | } | |
1272 | ||
1273 | static void capinc_tty_set_ldisc(struct tty_struct *tty) | |
1274 | { | |
1275 | #ifdef _DEBUG_TTYFUNCS | |
1276 | printk(KERN_DEBUG "capinc_tty_set_ldisc\n"); | |
1277 | #endif | |
1278 | } | |
1279 | ||
1280 | static void capinc_tty_send_xchar(struct tty_struct *tty, char ch) | |
1281 | { | |
1282 | #ifdef _DEBUG_TTYFUNCS | |
1283 | printk(KERN_DEBUG "capinc_tty_send_xchar(%d)\n", ch); | |
1284 | #endif | |
1285 | } | |
1286 | ||
1da177e4 LT |
1287 | static struct tty_driver *capinc_tty_driver; |
1288 | ||
b68e31d0 | 1289 | static const struct tty_operations capinc_ops = { |
1da177e4 LT |
1290 | .open = capinc_tty_open, |
1291 | .close = capinc_tty_close, | |
1292 | .write = capinc_tty_write, | |
1293 | .put_char = capinc_tty_put_char, | |
1294 | .flush_chars = capinc_tty_flush_chars, | |
1295 | .write_room = capinc_tty_write_room, | |
1296 | .chars_in_buffer = capinc_tty_chars_in_buffer, | |
1297 | .ioctl = capinc_tty_ioctl, | |
1298 | .set_termios = capinc_tty_set_termios, | |
1299 | .throttle = capinc_tty_throttle, | |
1300 | .unthrottle = capinc_tty_unthrottle, | |
1301 | .stop = capinc_tty_stop, | |
1302 | .start = capinc_tty_start, | |
1303 | .hangup = capinc_tty_hangup, | |
1304 | .break_ctl = capinc_tty_break_ctl, | |
1305 | .flush_buffer = capinc_tty_flush_buffer, | |
1306 | .set_ldisc = capinc_tty_set_ldisc, | |
1307 | .send_xchar = capinc_tty_send_xchar, | |
1da177e4 LT |
1308 | }; |
1309 | ||
1310 | static int capinc_tty_init(void) | |
1311 | { | |
1312 | struct tty_driver *drv; | |
1313 | ||
1314 | if (capi_ttyminors > CAPINC_MAX_PORTS) | |
1315 | capi_ttyminors = CAPINC_MAX_PORTS; | |
1316 | if (capi_ttyminors <= 0) | |
1317 | capi_ttyminors = CAPINC_NR_PORTS; | |
1318 | ||
81d17fe5 JK |
1319 | capiminors = kzalloc(sizeof(struct capi_minor *) * capi_ttyminors, |
1320 | GFP_KERNEL); | |
1321 | if (!capiminors) | |
1da177e4 LT |
1322 | return -ENOMEM; |
1323 | ||
81d17fe5 JK |
1324 | drv = alloc_tty_driver(capi_ttyminors); |
1325 | if (!drv) { | |
1326 | kfree(capiminors); | |
1327 | return -ENOMEM; | |
1328 | } | |
1da177e4 LT |
1329 | drv->owner = THIS_MODULE; |
1330 | drv->driver_name = "capi_nc"; | |
1da177e4 LT |
1331 | drv->name = "capi"; |
1332 | drv->major = capi_ttymajor; | |
1333 | drv->minor_start = 0; | |
1334 | drv->type = TTY_DRIVER_TYPE_SERIAL; | |
1335 | drv->subtype = SERIAL_TYPE_NORMAL; | |
1336 | drv->init_termios = tty_std_termios; | |
1337 | drv->init_termios.c_iflag = ICRNL; | |
1338 | drv->init_termios.c_oflag = OPOST | ONLCR; | |
1339 | drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
1340 | drv->init_termios.c_lflag = 0; | |
1341 | drv->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_RESET_TERMIOS; | |
1342 | tty_set_operations(drv, &capinc_ops); | |
1343 | if (tty_register_driver(drv)) { | |
1344 | put_tty_driver(drv); | |
81d17fe5 | 1345 | kfree(capiminors); |
1da177e4 LT |
1346 | printk(KERN_ERR "Couldn't register capi_nc driver\n"); |
1347 | return -1; | |
1348 | } | |
1349 | capinc_tty_driver = drv; | |
1350 | return 0; | |
1351 | } | |
1352 | ||
1353 | static void capinc_tty_exit(void) | |
1354 | { | |
1355 | struct tty_driver *drv = capinc_tty_driver; | |
1356 | int retval; | |
1357 | if ((retval = tty_unregister_driver(drv))) | |
1358 | printk(KERN_ERR "capi: failed to unregister capi_nc driver (%d)\n", retval); | |
1359 | put_tty_driver(drv); | |
81d17fe5 | 1360 | kfree(capiminors); |
1da177e4 LT |
1361 | } |
1362 | ||
501c87a9 JK |
1363 | #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
1364 | ||
1365 | static inline int capinc_tty_init(void) | |
1366 | { | |
1367 | return 0; | |
1368 | } | |
1369 | ||
1370 | static inline void capinc_tty_exit(void) { } | |
1371 | ||
1372 | #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
1da177e4 LT |
1373 | |
1374 | /* -------- /proc functions ----------------------------------------- */ | |
1375 | ||
1376 | /* | |
1377 | * /proc/capi/capi20: | |
1378 | * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt | |
1379 | */ | |
9a58a80a | 1380 | static int capi20_proc_show(struct seq_file *m, void *v) |
1da177e4 LT |
1381 | { |
1382 | struct capidev *cdev; | |
1383 | struct list_head *l; | |
1da177e4 | 1384 | |
b8f433dc | 1385 | mutex_lock(&capidev_list_lock); |
1da177e4 LT |
1386 | list_for_each(l, &capidev_list) { |
1387 | cdev = list_entry(l, struct capidev, list); | |
9a58a80a | 1388 | seq_printf(m, "0 %d %lu %lu %lu %lu\n", |
1da177e4 LT |
1389 | cdev->ap.applid, |
1390 | cdev->ap.nrecvctlpkt, | |
1391 | cdev->ap.nrecvdatapkt, | |
1392 | cdev->ap.nsentctlpkt, | |
1393 | cdev->ap.nsentdatapkt); | |
1da177e4 | 1394 | } |
b8f433dc | 1395 | mutex_unlock(&capidev_list_lock); |
9a58a80a | 1396 | return 0; |
1da177e4 LT |
1397 | } |
1398 | ||
9a58a80a AD |
1399 | static int capi20_proc_open(struct inode *inode, struct file *file) |
1400 | { | |
1401 | return single_open(file, capi20_proc_show, NULL); | |
1402 | } | |
1403 | ||
1404 | static const struct file_operations capi20_proc_fops = { | |
1405 | .owner = THIS_MODULE, | |
1406 | .open = capi20_proc_open, | |
1407 | .read = seq_read, | |
1408 | .llseek = seq_lseek, | |
1409 | .release = single_release, | |
1410 | }; | |
1411 | ||
1da177e4 LT |
1412 | /* |
1413 | * /proc/capi/capi20ncci: | |
1414 | * applid ncci | |
1415 | */ | |
9a58a80a | 1416 | static int capi20ncci_proc_show(struct seq_file *m, void *v) |
1da177e4 | 1417 | { |
884f5c44 JK |
1418 | struct capidev *cdev; |
1419 | struct capincci *np; | |
1da177e4 | 1420 | |
b8f433dc | 1421 | mutex_lock(&capidev_list_lock); |
884f5c44 | 1422 | list_for_each_entry(cdev, &capidev_list, list) { |
05b41494 | 1423 | mutex_lock(&cdev->lock); |
884f5c44 JK |
1424 | list_for_each_entry(np, &cdev->nccis, list) |
1425 | seq_printf(m, "%d 0x%x\n", cdev->ap.applid, np->ncci); | |
05b41494 | 1426 | mutex_unlock(&cdev->lock); |
1da177e4 | 1427 | } |
b8f433dc | 1428 | mutex_unlock(&capidev_list_lock); |
9a58a80a | 1429 | return 0; |
1da177e4 LT |
1430 | } |
1431 | ||
9a58a80a AD |
1432 | static int capi20ncci_proc_open(struct inode *inode, struct file *file) |
1433 | { | |
1434 | return single_open(file, capi20ncci_proc_show, NULL); | |
1435 | } | |
1436 | ||
1437 | static const struct file_operations capi20ncci_proc_fops = { | |
1438 | .owner = THIS_MODULE, | |
1439 | .open = capi20ncci_proc_open, | |
1440 | .read = seq_read, | |
1441 | .llseek = seq_lseek, | |
1442 | .release = single_release, | |
1da177e4 LT |
1443 | }; |
1444 | ||
1445 | static void __init proc_init(void) | |
1446 | { | |
9a58a80a AD |
1447 | proc_create("capi/capi20", 0, NULL, &capi20_proc_fops); |
1448 | proc_create("capi/capi20ncci", 0, NULL, &capi20ncci_proc_fops); | |
1da177e4 LT |
1449 | } |
1450 | ||
1451 | static void __exit proc_exit(void) | |
1452 | { | |
9a58a80a AD |
1453 | remove_proc_entry("capi/capi20", NULL); |
1454 | remove_proc_entry("capi/capi20ncci", NULL); | |
1da177e4 LT |
1455 | } |
1456 | ||
1457 | /* -------- init function and module interface ---------------------- */ | |
1458 | ||
1459 | ||
1da177e4 LT |
1460 | static int __init capi_init(void) |
1461 | { | |
88549d6b | 1462 | const char *compileinfo; |
6d9eac34 | 1463 | int major_ret; |
1da177e4 | 1464 | |
6d9eac34 AM |
1465 | major_ret = register_chrdev(capi_major, "capi20", &capi_fops); |
1466 | if (major_ret < 0) { | |
1da177e4 | 1467 | printk(KERN_ERR "capi20: unable to get major %d\n", capi_major); |
6d9eac34 | 1468 | return major_ret; |
1da177e4 | 1469 | } |
56b22935 | 1470 | capi_class = class_create(THIS_MODULE, "capi"); |
1da177e4 LT |
1471 | if (IS_ERR(capi_class)) { |
1472 | unregister_chrdev(capi_major, "capi20"); | |
1473 | return PTR_ERR(capi_class); | |
1474 | } | |
1475 | ||
a9b12619 | 1476 | device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi"); |
1da177e4 | 1477 | |
1da177e4 | 1478 | if (capinc_tty_init() < 0) { |
d78b0368 | 1479 | device_destroy(capi_class, MKDEV(capi_major, 0)); |
56b22935 | 1480 | class_destroy(capi_class); |
1da177e4 LT |
1481 | unregister_chrdev(capi_major, "capi20"); |
1482 | return -ENOMEM; | |
1483 | } | |
1da177e4 LT |
1484 | |
1485 | proc_init(); | |
1486 | ||
1da177e4 LT |
1487 | #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE) |
1488 | compileinfo = " (middleware+capifs)"; | |
501c87a9 | 1489 | #elif defined(CONFIG_ISDN_CAPI_MIDDLEWARE) |
1da177e4 | 1490 | compileinfo = " (no capifs)"; |
1da177e4 LT |
1491 | #else |
1492 | compileinfo = " (no middleware)"; | |
1493 | #endif | |
88549d6b JK |
1494 | printk(KERN_NOTICE "CAPI 2.0 started up with major %d%s\n", |
1495 | capi_major, compileinfo); | |
1da177e4 LT |
1496 | |
1497 | return 0; | |
1498 | } | |
1499 | ||
1500 | static void __exit capi_exit(void) | |
1501 | { | |
1502 | proc_exit(); | |
1503 | ||
d78b0368 | 1504 | device_destroy(capi_class, MKDEV(capi_major, 0)); |
56b22935 | 1505 | class_destroy(capi_class); |
1da177e4 | 1506 | unregister_chrdev(capi_major, "capi20"); |
1da177e4 | 1507 | |
1da177e4 | 1508 | capinc_tty_exit(); |
1da177e4 LT |
1509 | } |
1510 | ||
1511 | module_init(capi_init); | |
1512 | module_exit(capi_exit); |