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> |
1da177e4 LT |
23 | #include <linux/timer.h> |
24 | #include <linux/wait.h> | |
1da177e4 | 25 | #include <linux/tty.h> |
1da177e4 LT |
26 | #include <linux/netdevice.h> |
27 | #include <linux/ppp_defs.h> | |
4b32da2b | 28 | #include <linux/ppp-ioctl.h> |
1da177e4 LT |
29 | #include <linux/skbuff.h> |
30 | #include <linux/proc_fs.h> | |
9a58a80a | 31 | #include <linux/seq_file.h> |
1da177e4 LT |
32 | #include <linux/poll.h> |
33 | #include <linux/capi.h> | |
34 | #include <linux/kernelcapi.h> | |
35 | #include <linux/init.h> | |
36 | #include <linux/device.h> | |
37 | #include <linux/moduleparam.h> | |
1da177e4 LT |
38 | #include <linux/isdn/capiutil.h> |
39 | #include <linux/isdn/capicmd.h> | |
90926f0e | 40 | |
1da177e4 LT |
41 | MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface"); |
42 | MODULE_AUTHOR("Carsten Paeth"); | |
43 | MODULE_LICENSE("GPL"); | |
44 | ||
1da177e4 LT |
45 | /* -------- driver information -------------------------------------- */ |
46 | ||
76a64921 | 47 | static DEFINE_MUTEX(capi_mutex); |
56b22935 | 48 | static struct class *capi_class; |
408b664a | 49 | static int capi_major = 68; /* allocated */ |
501c87a9 JK |
50 | |
51 | module_param_named(major, capi_major, uint, 0); | |
52 | ||
1da177e4 | 53 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
501c87a9 | 54 | #define CAPINC_NR_PORTS 32 |
1da177e4 | 55 | #define CAPINC_MAX_PORTS 256 |
501c87a9 | 56 | |
408b664a | 57 | static int capi_ttyminors = CAPINC_NR_PORTS; |
1da177e4 | 58 | |
1da177e4 LT |
59 | module_param_named(ttyminors, capi_ttyminors, uint, 0); |
60 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
61 | ||
62 | /* -------- defines ------------------------------------------------- */ | |
63 | ||
64 | #define CAPINC_MAX_RECVQUEUE 10 | |
65 | #define CAPINC_MAX_SENDQUEUE 10 | |
66 | #define CAPI_MAX_BLKSIZE 2048 | |
67 | ||
68 | /* -------- data structures ----------------------------------------- */ | |
69 | ||
70 | struct capidev; | |
71 | struct capincci; | |
1da177e4 LT |
72 | struct capiminor; |
73 | ||
42651b5c | 74 | struct ackqueue_entry { |
6aa65472 MB |
75 | struct list_head list; |
76 | u16 datahandle; | |
77 | }; | |
78 | ||
1da177e4 | 79 | struct capiminor { |
1da177e4 LT |
80 | unsigned int minor; |
81 | ||
42792713 JK |
82 | struct capi20_appl *ap; |
83 | u32 ncci; | |
84 | atomic_t datahandle; | |
85 | atomic_t msgid; | |
1da177e4 | 86 | |
fb4b4881 | 87 | struct tty_port port; |
1da177e4 LT |
88 | int ttyinstop; |
89 | int ttyoutstop; | |
1da177e4 | 90 | |
dfbb84ff JK |
91 | struct sk_buff_head inqueue; |
92 | ||
93 | struct sk_buff_head outqueue; | |
94 | int outbytes; | |
95 | struct sk_buff *outskb; | |
96 | spinlock_t outlock; | |
1da177e4 LT |
97 | |
98 | /* transmit path */ | |
6aa65472 | 99 | struct list_head ackqueue; |
1da177e4 | 100 | int nack; |
6aa65472 | 101 | spinlock_t ackqlock; |
1da177e4 | 102 | }; |
1da177e4 LT |
103 | |
104 | struct capincci { | |
884f5c44 | 105 | struct list_head list; |
1da177e4 LT |
106 | u32 ncci; |
107 | struct capidev *cdev; | |
108 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
109 | struct capiminor *minorp; | |
110 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
111 | }; | |
112 | ||
113 | struct capidev { | |
114 | struct list_head list; | |
115 | struct capi20_appl ap; | |
116 | u16 errcode; | |
117 | unsigned userflags; | |
118 | ||
119 | struct sk_buff_head recvqueue; | |
120 | wait_queue_head_t recvwait; | |
121 | ||
884f5c44 | 122 | struct list_head nccis; |
1da177e4 | 123 | |
05b41494 | 124 | struct mutex lock; |
1da177e4 LT |
125 | }; |
126 | ||
127 | /* -------- global variables ---------------------------------------- */ | |
128 | ||
b8f433dc | 129 | static DEFINE_MUTEX(capidev_list_lock); |
1da177e4 LT |
130 | static LIST_HEAD(capidev_list); |
131 | ||
132 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
501c87a9 | 133 | |
3d5d30fe | 134 | static DEFINE_SPINLOCK(capiminors_lock); |
81d17fe5 | 135 | static struct capiminor **capiminors; |
1da177e4 | 136 | |
40fb2d0d JK |
137 | static struct tty_driver *capinc_tty_driver; |
138 | ||
1da177e4 LT |
139 | /* -------- datahandles --------------------------------------------- */ |
140 | ||
501c87a9 | 141 | static int capiminor_add_ack(struct capiminor *mp, u16 datahandle) |
1da177e4 | 142 | { |
42651b5c | 143 | struct ackqueue_entry *n; |
1da177e4 LT |
144 | |
145 | n = kmalloc(sizeof(*n), GFP_ATOMIC); | |
6aa65472 MB |
146 | if (unlikely(!n)) { |
147 | printk(KERN_ERR "capi: alloc datahandle failed\n"); | |
148 | return -1; | |
1da177e4 | 149 | } |
1da177e4 | 150 | n->datahandle = datahandle; |
6aa65472 | 151 | INIT_LIST_HEAD(&n->list); |
2b72b5bd | 152 | spin_lock_bh(&mp->ackqlock); |
6aa65472 | 153 | list_add_tail(&n->list, &mp->ackqueue); |
1da177e4 | 154 | mp->nack++; |
2b72b5bd | 155 | spin_unlock_bh(&mp->ackqlock); |
1da177e4 LT |
156 | return 0; |
157 | } | |
158 | ||
159 | static int capiminor_del_ack(struct capiminor *mp, u16 datahandle) | |
160 | { | |
42651b5c | 161 | struct ackqueue_entry *p, *tmp; |
1da177e4 | 162 | |
2b72b5bd | 163 | spin_lock_bh(&mp->ackqlock); |
6aa65472 | 164 | list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { |
475be4d8 | 165 | if (p->datahandle == datahandle) { |
6aa65472 | 166 | list_del(&p->list); |
1da177e4 | 167 | mp->nack--; |
2b72b5bd JK |
168 | spin_unlock_bh(&mp->ackqlock); |
169 | kfree(p); | |
1da177e4 LT |
170 | return 0; |
171 | } | |
172 | } | |
2b72b5bd | 173 | spin_unlock_bh(&mp->ackqlock); |
1da177e4 LT |
174 | return -1; |
175 | } | |
176 | ||
177 | static void capiminor_del_all_ack(struct capiminor *mp) | |
178 | { | |
42651b5c | 179 | struct ackqueue_entry *p, *tmp; |
1da177e4 | 180 | |
6aa65472 MB |
181 | list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { |
182 | list_del(&p->list); | |
1da177e4 LT |
183 | kfree(p); |
184 | mp->nack--; | |
185 | } | |
186 | } | |
187 | ||
188 | ||
189 | /* -------- struct capiminor ---------------------------------------- */ | |
190 | ||
55bef83c JS |
191 | static void capiminor_destroy(struct tty_port *port) |
192 | { | |
193 | struct capiminor *mp = container_of(port, struct capiminor, port); | |
194 | ||
195 | kfree_skb(mp->outskb); | |
196 | skb_queue_purge(&mp->inqueue); | |
197 | skb_queue_purge(&mp->outqueue); | |
198 | capiminor_del_all_ack(mp); | |
199 | kfree(mp); | |
200 | } | |
201 | ||
202 | static const struct tty_port_operations capiminor_port_ops = { | |
203 | .destruct = capiminor_destroy, | |
204 | }; | |
fb4b4881 | 205 | |
1da177e4 LT |
206 | static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci) |
207 | { | |
81d17fe5 | 208 | struct capiminor *mp; |
40fb2d0d | 209 | struct device *dev; |
81d17fe5 | 210 | unsigned int minor; |
1da177e4 | 211 | |
54f0fad3 | 212 | mp = kzalloc(sizeof(*mp), GFP_KERNEL); |
475be4d8 JP |
213 | if (!mp) { |
214 | printk(KERN_ERR "capi: can't alloc capiminor\n"); | |
1da177e4 LT |
215 | return NULL; |
216 | } | |
217 | ||
1da177e4 LT |
218 | mp->ap = ap; |
219 | mp->ncci = ncci; | |
6aa65472 MB |
220 | INIT_LIST_HEAD(&mp->ackqueue); |
221 | spin_lock_init(&mp->ackqlock); | |
1da177e4 LT |
222 | |
223 | skb_queue_head_init(&mp->inqueue); | |
224 | skb_queue_head_init(&mp->outqueue); | |
dfbb84ff | 225 | spin_lock_init(&mp->outlock); |
1da177e4 | 226 | |
fb4b4881 JK |
227 | tty_port_init(&mp->port); |
228 | mp->port.ops = &capiminor_port_ops; | |
229 | ||
81d17fe5 | 230 | /* Allocate the least unused minor number. */ |
3d5d30fe | 231 | spin_lock(&capiminors_lock); |
81d17fe5 JK |
232 | for (minor = 0; minor < capi_ttyminors; minor++) |
233 | if (!capiminors[minor]) { | |
234 | capiminors[minor] = mp; | |
235 | break; | |
1da177e4 | 236 | } |
3d5d30fe | 237 | spin_unlock(&capiminors_lock); |
1da177e4 | 238 | |
81d17fe5 | 239 | if (minor == capi_ttyminors) { |
1da177e4 | 240 | printk(KERN_NOTICE "capi: out of minors\n"); |
40fb2d0d | 241 | goto err_out1; |
1da177e4 LT |
242 | } |
243 | ||
81d17fe5 JK |
244 | mp->minor = minor; |
245 | ||
734cc178 JS |
246 | dev = tty_port_register_device(&mp->port, capinc_tty_driver, minor, |
247 | NULL); | |
40fb2d0d JK |
248 | if (IS_ERR(dev)) |
249 | goto err_out2; | |
250 | ||
1da177e4 | 251 | return mp; |
40fb2d0d JK |
252 | |
253 | err_out2: | |
3d5d30fe | 254 | spin_lock(&capiminors_lock); |
40fb2d0d | 255 | capiminors[minor] = NULL; |
3d5d30fe | 256 | spin_unlock(&capiminors_lock); |
40fb2d0d JK |
257 | |
258 | err_out1: | |
55bef83c | 259 | tty_port_put(&mp->port); |
40fb2d0d | 260 | return NULL; |
1da177e4 LT |
261 | } |
262 | ||
40fb2d0d | 263 | static struct capiminor *capiminor_get(unsigned int minor) |
1da177e4 | 264 | { |
81d17fe5 | 265 | struct capiminor *mp; |
1da177e4 | 266 | |
3d5d30fe | 267 | spin_lock(&capiminors_lock); |
81d17fe5 | 268 | mp = capiminors[minor]; |
0159d549 | 269 | if (mp) |
55bef83c | 270 | tty_port_get(&mp->port); |
3d5d30fe | 271 | spin_unlock(&capiminors_lock); |
81d17fe5 JK |
272 | |
273 | return mp; | |
1da177e4 | 274 | } |
1da177e4 | 275 | |
0159d549 JK |
276 | static inline void capiminor_put(struct capiminor *mp) |
277 | { | |
55bef83c | 278 | tty_port_put(&mp->port); |
0159d549 JK |
279 | } |
280 | ||
281 | static void capiminor_free(struct capiminor *mp) | |
282 | { | |
0159d549 JK |
283 | tty_unregister_device(capinc_tty_driver, mp->minor); |
284 | ||
3d5d30fe | 285 | spin_lock(&capiminors_lock); |
0159d549 | 286 | capiminors[mp->minor] = NULL; |
3d5d30fe | 287 | spin_unlock(&capiminors_lock); |
0159d549 JK |
288 | |
289 | capiminor_put(mp); | |
290 | } | |
291 | ||
1da177e4 LT |
292 | /* -------- struct capincci ----------------------------------------- */ |
293 | ||
501c87a9 | 294 | static void capincci_alloc_minor(struct capidev *cdev, struct capincci *np) |
1da177e4 | 295 | { |
1f90d665 JK |
296 | if (cdev->userflags & CAPIFLAG_HIGHJACKING) |
297 | np->minorp = capiminor_alloc(&cdev->ap, np->ncci); | |
501c87a9 JK |
298 | } |
299 | ||
300 | static void capincci_free_minor(struct capincci *np) | |
301 | { | |
302 | struct capiminor *mp = np->minorp; | |
fb4b4881 | 303 | struct tty_struct *tty; |
501c87a9 JK |
304 | |
305 | if (mp) { | |
fb4b4881 JK |
306 | tty = tty_port_tty_get(&mp->port); |
307 | if (tty) { | |
30bced91 | 308 | tty_vhangup(tty); |
fb4b4881 | 309 | tty_kref_put(tty); |
501c87a9 | 310 | } |
fb4b4881 JK |
311 | |
312 | capiminor_free(mp); | |
501c87a9 JK |
313 | } |
314 | } | |
315 | ||
316 | static inline unsigned int capincci_minor_opencount(struct capincci *np) | |
317 | { | |
318 | struct capiminor *mp = np->minorp; | |
a84fdf41 JK |
319 | unsigned int count = 0; |
320 | struct tty_struct *tty; | |
501c87a9 | 321 | |
a84fdf41 JK |
322 | if (mp) { |
323 | tty = tty_port_tty_get(&mp->port); | |
324 | if (tty) { | |
325 | count = tty->count; | |
326 | tty_kref_put(tty); | |
327 | } | |
328 | } | |
329 | return count; | |
501c87a9 JK |
330 | } |
331 | ||
332 | #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
333 | ||
334 | static inline void | |
335 | capincci_alloc_minor(struct capidev *cdev, struct capincci *np) { } | |
336 | static inline void capincci_free_minor(struct capincci *np) { } | |
337 | ||
501c87a9 JK |
338 | #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
339 | ||
340 | static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci) | |
341 | { | |
884f5c44 | 342 | struct capincci *np; |
501c87a9 | 343 | |
54f0fad3 | 344 | np = kzalloc(sizeof(*np), GFP_KERNEL); |
501c87a9 JK |
345 | if (!np) |
346 | return NULL; | |
347 | np->ncci = ncci; | |
348 | np->cdev = cdev; | |
349 | ||
350 | capincci_alloc_minor(cdev, np); | |
351 | ||
884f5c44 JK |
352 | list_add_tail(&np->list, &cdev->nccis); |
353 | ||
354 | return np; | |
1da177e4 LT |
355 | } |
356 | ||
357 | static void capincci_free(struct capidev *cdev, u32 ncci) | |
358 | { | |
884f5c44 | 359 | struct capincci *np, *tmp; |
1da177e4 | 360 | |
884f5c44 | 361 | list_for_each_entry_safe(np, tmp, &cdev->nccis, list) |
1da177e4 | 362 | if (ncci == 0xffffffff || np->ncci == ncci) { |
501c87a9 | 363 | capincci_free_minor(np); |
884f5c44 | 364 | list_del(&np->list); |
1da177e4 | 365 | kfree(np); |
1da177e4 | 366 | } |
1da177e4 LT |
367 | } |
368 | ||
7dc2ce5f | 369 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
1da177e4 LT |
370 | static struct capincci *capincci_find(struct capidev *cdev, u32 ncci) |
371 | { | |
884f5c44 | 372 | struct capincci *np; |
1da177e4 | 373 | |
884f5c44 JK |
374 | list_for_each_entry(np, &cdev->nccis, list) |
375 | if (np->ncci == ncci) | |
376 | return np; | |
377 | return NULL; | |
1da177e4 LT |
378 | } |
379 | ||
1da177e4 LT |
380 | /* -------- handle data queue --------------------------------------- */ |
381 | ||
382 | static struct sk_buff * | |
383 | gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb) | |
384 | { | |
385 | struct sk_buff *nskb; | |
dfbb84ff | 386 | nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_KERNEL); |
1da177e4 | 387 | if (nskb) { |
475be4d8 | 388 | u16 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 4 + 2); |
1da177e4 LT |
389 | unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN); |
390 | capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN); | |
391 | capimsg_setu16(s, 2, mp->ap->applid); | |
392 | capimsg_setu8 (s, 4, CAPI_DATA_B3); | |
393 | capimsg_setu8 (s, 5, CAPI_RESP); | |
42792713 | 394 | capimsg_setu16(s, 6, atomic_inc_return(&mp->msgid)); |
1da177e4 LT |
395 | capimsg_setu32(s, 8, mp->ncci); |
396 | capimsg_setu16(s, 12, datahandle); | |
397 | } | |
398 | return nskb; | |
399 | } | |
400 | ||
401 | static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb) | |
402 | { | |
a11ef7be | 403 | unsigned int datalen = skb->len - CAPIMSG_LEN(skb->data); |
fb4b4881 | 404 | struct tty_struct *tty; |
1da177e4 | 405 | struct sk_buff *nskb; |
1da177e4 LT |
406 | u16 errcode, datahandle; |
407 | struct tty_ldisc *ld; | |
fb4b4881 JK |
408 | int ret = -1; |
409 | ||
fb4b4881 JK |
410 | tty = tty_port_tty_get(&mp->port); |
411 | if (!tty) { | |
8fb53b95 | 412 | pr_debug("capi: currently no receiver\n"); |
1da177e4 LT |
413 | return -1; |
414 | } | |
475be4d8 | 415 | |
fb4b4881 | 416 | ld = tty_ldisc_ref(tty); |
a11ef7be JK |
417 | if (!ld) { |
418 | /* fatal error, do not requeue */ | |
419 | ret = 0; | |
420 | kfree_skb(skb); | |
421 | goto deref_tty; | |
422 | } | |
fb4b4881 | 423 | |
a352def2 | 424 | if (ld->ops->receive_buf == NULL) { |
8fb53b95 | 425 | pr_debug("capi: ldisc has no receive_buf function\n"); |
a11ef7be JK |
426 | /* fatal error, do not requeue */ |
427 | goto free_skb; | |
1da177e4 LT |
428 | } |
429 | if (mp->ttyinstop) { | |
8fb53b95 | 430 | pr_debug("capi: recv tty throttled\n"); |
a11ef7be | 431 | goto deref_ldisc; |
1da177e4 | 432 | } |
a11ef7be | 433 | |
fb4b4881 | 434 | if (tty->receive_room < datalen) { |
8fb53b95 | 435 | pr_debug("capi: no room in tty\n"); |
a11ef7be | 436 | goto deref_ldisc; |
1da177e4 | 437 | } |
a11ef7be JK |
438 | |
439 | nskb = gen_data_b3_resp_for(mp, skb); | |
440 | if (!nskb) { | |
1da177e4 | 441 | printk(KERN_ERR "capi: gen_data_b3_resp failed\n"); |
a11ef7be | 442 | goto deref_ldisc; |
1da177e4 | 443 | } |
a11ef7be JK |
444 | |
445 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4); | |
446 | ||
1da177e4 | 447 | errcode = capi20_put_message(mp->ap, nskb); |
a11ef7be JK |
448 | |
449 | if (errcode == CAPI_NOERROR) { | |
450 | skb_pull(skb, CAPIMSG_LEN(skb->data)); | |
8fb53b95 DM |
451 | pr_debug("capi: DATA_B3_RESP %u len=%d => ldisc\n", |
452 | datahandle, skb->len); | |
a11ef7be JK |
453 | ld->ops->receive_buf(tty, skb->data, NULL, skb->len); |
454 | } else { | |
1da177e4 | 455 | printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n", |
475be4d8 | 456 | errcode); |
1da177e4 | 457 | kfree_skb(nskb); |
a11ef7be JK |
458 | |
459 | if (errcode == CAPI_SENDQUEUEFULL) | |
460 | goto deref_ldisc; | |
1da177e4 | 461 | } |
a11ef7be JK |
462 | |
463 | free_skb: | |
fb4b4881 | 464 | ret = 0; |
a11ef7be JK |
465 | kfree_skb(skb); |
466 | ||
467 | deref_ldisc: | |
1da177e4 | 468 | tty_ldisc_deref(ld); |
a11ef7be JK |
469 | |
470 | deref_tty: | |
fb4b4881 JK |
471 | tty_kref_put(tty); |
472 | return ret; | |
1da177e4 LT |
473 | } |
474 | ||
475 | static void handle_minor_recv(struct capiminor *mp) | |
476 | { | |
477 | struct sk_buff *skb; | |
68d7347b JK |
478 | |
479 | while ((skb = skb_dequeue(&mp->inqueue)) != NULL) | |
1da177e4 LT |
480 | if (handle_recv_skb(mp, skb) < 0) { |
481 | skb_queue_head(&mp->inqueue, skb); | |
1da177e4 LT |
482 | return; |
483 | } | |
1da177e4 LT |
484 | } |
485 | ||
eef0ced0 | 486 | static void handle_minor_send(struct capiminor *mp) |
1da177e4 | 487 | { |
fb4b4881 | 488 | struct tty_struct *tty; |
1da177e4 LT |
489 | struct sk_buff *skb; |
490 | u16 len; | |
1da177e4 LT |
491 | u16 errcode; |
492 | u16 datahandle; | |
493 | ||
fb4b4881 JK |
494 | tty = tty_port_tty_get(&mp->port); |
495 | if (!tty) | |
eef0ced0 | 496 | return; |
fb4b4881 JK |
497 | |
498 | if (mp->ttyoutstop) { | |
8fb53b95 | 499 | pr_debug("capi: send: tty stopped\n"); |
fb4b4881 | 500 | tty_kref_put(tty); |
eef0ced0 | 501 | return; |
1da177e4 LT |
502 | } |
503 | ||
dfbb84ff JK |
504 | while (1) { |
505 | spin_lock_bh(&mp->outlock); | |
506 | skb = __skb_dequeue(&mp->outqueue); | |
507 | if (!skb) { | |
508 | spin_unlock_bh(&mp->outlock); | |
509 | break; | |
510 | } | |
1da177e4 | 511 | len = (u16)skb->len; |
dfbb84ff JK |
512 | mp->outbytes -= len; |
513 | spin_unlock_bh(&mp->outlock); | |
514 | ||
515 | datahandle = atomic_inc_return(&mp->datahandle); | |
1da177e4 LT |
516 | skb_push(skb, CAPI_DATA_B3_REQ_LEN); |
517 | memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN); | |
518 | capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN); | |
519 | capimsg_setu16(skb->data, 2, mp->ap->applid); | |
520 | capimsg_setu8 (skb->data, 4, CAPI_DATA_B3); | |
521 | capimsg_setu8 (skb->data, 5, CAPI_REQ); | |
42792713 | 522 | capimsg_setu16(skb->data, 6, atomic_inc_return(&mp->msgid)); |
1da177e4 | 523 | capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */ |
5e6c20a9 | 524 | capimsg_setu32(skb->data, 12, (u32)(long)skb->data);/* Data32 */ |
1da177e4 LT |
525 | capimsg_setu16(skb->data, 16, len); /* Data length */ |
526 | capimsg_setu16(skb->data, 18, datahandle); | |
527 | capimsg_setu16(skb->data, 20, 0); /* Flags */ | |
528 | ||
501c87a9 | 529 | if (capiminor_add_ack(mp, datahandle) < 0) { |
1da177e4 | 530 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); |
dfbb84ff JK |
531 | |
532 | spin_lock_bh(&mp->outlock); | |
533 | __skb_queue_head(&mp->outqueue, skb); | |
534 | mp->outbytes += len; | |
535 | spin_unlock_bh(&mp->outlock); | |
536 | ||
eef0ced0 | 537 | break; |
1da177e4 LT |
538 | } |
539 | errcode = capi20_put_message(mp->ap, skb); | |
540 | if (errcode == CAPI_NOERROR) { | |
8fb53b95 DM |
541 | pr_debug("capi: DATA_B3_REQ %u len=%u\n", |
542 | datahandle, len); | |
1da177e4 LT |
543 | continue; |
544 | } | |
545 | capiminor_del_ack(mp, datahandle); | |
546 | ||
547 | if (errcode == CAPI_SENDQUEUEFULL) { | |
548 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); | |
dfbb84ff JK |
549 | |
550 | spin_lock_bh(&mp->outlock); | |
551 | __skb_queue_head(&mp->outqueue, skb); | |
552 | mp->outbytes += len; | |
553 | spin_unlock_bh(&mp->outlock); | |
554 | ||
1da177e4 LT |
555 | break; |
556 | } | |
557 | ||
558 | /* ups, drop packet */ | |
559 | printk(KERN_ERR "capi: put_message = %x\n", errcode); | |
1da177e4 LT |
560 | kfree_skb(skb); |
561 | } | |
fb4b4881 | 562 | tty_kref_put(tty); |
1da177e4 LT |
563 | } |
564 | ||
565 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
566 | /* -------- function called by lower level -------------------------- */ | |
567 | ||
568 | static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb) | |
569 | { | |
570 | struct capidev *cdev = ap->private; | |
571 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
572 | struct capiminor *mp; | |
573 | u16 datahandle; | |
1da177e4 | 574 | struct capincci *np; |
7dc2ce5f | 575 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
1da177e4 | 576 | |
05b41494 JK |
577 | mutex_lock(&cdev->lock); |
578 | ||
1da177e4 LT |
579 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) { |
580 | u16 info = CAPIMSG_U16(skb->data, 12); // Info field | |
05b41494 | 581 | if ((info & 0xff00) == 0) |
1da177e4 | 582 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); |
1da177e4 | 583 | } |
05b41494 | 584 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) |
1da177e4 | 585 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); |
05b41494 | 586 | |
1da177e4 LT |
587 | if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) { |
588 | skb_queue_tail(&cdev->recvqueue, skb); | |
589 | wake_up_interruptible(&cdev->recvwait); | |
05b41494 | 590 | goto unlock_out; |
1da177e4 | 591 | } |
05b41494 | 592 | |
7dc2ce5f TS |
593 | #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE |
594 | skb_queue_tail(&cdev->recvqueue, skb); | |
595 | wake_up_interruptible(&cdev->recvwait); | |
596 | ||
597 | #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
598 | ||
05b41494 | 599 | np = capincci_find(cdev, CAPIMSG_CONTROL(skb->data)); |
1da177e4 LT |
600 | if (!np) { |
601 | printk(KERN_ERR "BUG: capi_signal: ncci not found\n"); | |
602 | skb_queue_tail(&cdev->recvqueue, skb); | |
603 | wake_up_interruptible(&cdev->recvwait); | |
05b41494 | 604 | goto unlock_out; |
1da177e4 | 605 | } |
501c87a9 | 606 | |
1da177e4 LT |
607 | mp = np->minorp; |
608 | if (!mp) { | |
609 | skb_queue_tail(&cdev->recvqueue, skb); | |
610 | wake_up_interruptible(&cdev->recvwait); | |
05b41494 | 611 | goto unlock_out; |
1da177e4 | 612 | } |
1da177e4 | 613 | if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) { |
475be4d8 | 614 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 4 + 2); |
8fb53b95 DM |
615 | pr_debug("capi_signal: DATA_B3_IND %u len=%d\n", |
616 | datahandle, skb->len-CAPIMSG_LEN(skb->data)); | |
1da177e4 | 617 | skb_queue_tail(&mp->inqueue, skb); |
68d7347b | 618 | |
1da177e4 LT |
619 | handle_minor_recv(mp); |
620 | ||
621 | } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) { | |
622 | ||
475be4d8 | 623 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4); |
8fb53b95 DM |
624 | pr_debug("capi_signal: DATA_B3_CONF %u 0x%x\n", |
625 | datahandle, | |
475be4d8 | 626 | CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 2)); |
1da177e4 | 627 | kfree_skb(skb); |
2b72b5bd | 628 | capiminor_del_ack(mp, datahandle); |
6aad04f2 | 629 | tty_port_tty_wakeup(&mp->port); |
eef0ced0 | 630 | handle_minor_send(mp); |
1da177e4 LT |
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: |
05b41494 | 640 | mutex_unlock(&cdev->lock); |
1da177e4 LT |
641 | } |
642 | ||
643 | /* -------- file_operations for capidev ----------------------------- */ | |
644 | ||
645 | static ssize_t | |
646 | capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
647 | { | |
54cbb1ca | 648 | struct capidev *cdev = file->private_data; |
1da177e4 LT |
649 | struct sk_buff *skb; |
650 | size_t copied; | |
28a1dbb6 | 651 | int err; |
1da177e4 LT |
652 | |
653 | if (!cdev->ap.applid) | |
654 | return -ENODEV; | |
655 | ||
28a1dbb6 JK |
656 | skb = skb_dequeue(&cdev->recvqueue); |
657 | if (!skb) { | |
1da177e4 LT |
658 | if (file->f_flags & O_NONBLOCK) |
659 | return -EAGAIN; | |
28a1dbb6 | 660 | err = wait_event_interruptible(cdev->recvwait, |
475be4d8 | 661 | (skb = skb_dequeue(&cdev->recvqueue))); |
28a1dbb6 JK |
662 | if (err) |
663 | return err; | |
1da177e4 LT |
664 | } |
665 | if (skb->len > count) { | |
666 | skb_queue_head(&cdev->recvqueue, skb); | |
667 | return -EMSGSIZE; | |
668 | } | |
669 | if (copy_to_user(buf, skb->data, skb->len)) { | |
670 | skb_queue_head(&cdev->recvqueue, skb); | |
671 | return -EFAULT; | |
672 | } | |
673 | copied = skb->len; | |
674 | ||
675 | kfree_skb(skb); | |
676 | ||
677 | return copied; | |
678 | } | |
679 | ||
680 | static ssize_t | |
681 | capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
682 | { | |
54cbb1ca | 683 | struct capidev *cdev = file->private_data; |
1da177e4 LT |
684 | struct sk_buff *skb; |
685 | u16 mlen; | |
686 | ||
687 | if (!cdev->ap.applid) | |
688 | return -ENODEV; | |
689 | ||
690 | skb = alloc_skb(count, GFP_USER); | |
691 | if (!skb) | |
692 | return -ENOMEM; | |
693 | ||
694 | if (copy_from_user(skb_put(skb, count), buf, count)) { | |
695 | kfree_skb(skb); | |
696 | return -EFAULT; | |
697 | } | |
698 | mlen = CAPIMSG_LEN(skb->data); | |
699 | if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) { | |
700 | if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) { | |
701 | kfree_skb(skb); | |
702 | return -EINVAL; | |
703 | } | |
704 | } else { | |
705 | if (mlen != count) { | |
706 | kfree_skb(skb); | |
707 | return -EINVAL; | |
708 | } | |
709 | } | |
710 | CAPIMSG_SETAPPID(skb->data, cdev->ap.applid); | |
711 | ||
712 | if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) { | |
05b41494 | 713 | mutex_lock(&cdev->lock); |
1da177e4 | 714 | capincci_free(cdev, CAPIMSG_NCCI(skb->data)); |
05b41494 | 715 | mutex_unlock(&cdev->lock); |
1da177e4 LT |
716 | } |
717 | ||
718 | cdev->errcode = capi20_put_message(&cdev->ap, skb); | |
719 | ||
720 | if (cdev->errcode) { | |
721 | kfree_skb(skb); | |
722 | return -EIO; | |
723 | } | |
724 | return count; | |
725 | } | |
726 | ||
727 | static unsigned int | |
475be4d8 | 728 | capi_poll(struct file *file, poll_table *wait) |
1da177e4 | 729 | { |
54cbb1ca | 730 | struct capidev *cdev = file->private_data; |
1da177e4 LT |
731 | unsigned int mask = 0; |
732 | ||
733 | if (!cdev->ap.applid) | |
734 | return POLLERR; | |
735 | ||
736 | poll_wait(file, &(cdev->recvwait), wait); | |
737 | mask = POLLOUT | POLLWRNORM; | |
738 | if (!skb_queue_empty(&cdev->recvqueue)) | |
739 | mask |= POLLIN | POLLRDNORM; | |
740 | return mask; | |
741 | } | |
742 | ||
743 | static int | |
703c631e | 744 | capi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
745 | { |
746 | struct capidev *cdev = file->private_data; | |
1da177e4 LT |
747 | capi_ioctl_struct data; |
748 | int retval = -EINVAL; | |
749 | void __user *argp = (void __user *)arg; | |
750 | ||
751 | switch (cmd) { | |
752 | case CAPI_REGISTER: | |
05b41494 | 753 | mutex_lock(&cdev->lock); |
1da177e4 | 754 | |
05b41494 JK |
755 | if (cdev->ap.applid) { |
756 | retval = -EEXIST; | |
757 | goto register_out; | |
758 | } | |
759 | if (copy_from_user(&cdev->ap.rparam, argp, | |
760 | sizeof(struct capi_register_params))) { | |
761 | retval = -EFAULT; | |
762 | goto register_out; | |
763 | } | |
764 | cdev->ap.private = cdev; | |
765 | cdev->ap.recv_message = capi_recv_message; | |
766 | cdev->errcode = capi20_register(&cdev->ap); | |
767 | retval = (int)cdev->ap.applid; | |
768 | if (cdev->errcode) { | |
769 | cdev->ap.applid = 0; | |
770 | retval = -EIO; | |
1da177e4 | 771 | } |
05b41494 JK |
772 | |
773 | register_out: | |
774 | mutex_unlock(&cdev->lock); | |
775 | return retval; | |
1da177e4 LT |
776 | |
777 | case CAPI_GET_VERSION: | |
475be4d8 JP |
778 | if (copy_from_user(&data.contr, argp, |
779 | sizeof(data.contr))) | |
780 | return -EFAULT; | |
781 | cdev->errcode = capi20_get_version(data.contr, &data.version); | |
782 | if (cdev->errcode) | |
783 | return -EIO; | |
784 | if (copy_to_user(argp, &data.version, | |
785 | sizeof(data.version))) | |
786 | return -EFAULT; | |
7fdaadcc | 787 | return 0; |
1da177e4 LT |
788 | |
789 | case CAPI_GET_SERIAL: | |
475be4d8 JP |
790 | if (copy_from_user(&data.contr, argp, |
791 | sizeof(data.contr))) | |
792 | return -EFAULT; | |
793 | cdev->errcode = capi20_get_serial(data.contr, data.serial); | |
794 | if (cdev->errcode) | |
795 | return -EIO; | |
796 | if (copy_to_user(argp, data.serial, | |
797 | sizeof(data.serial))) | |
798 | return -EFAULT; | |
7fdaadcc TS |
799 | return 0; |
800 | ||
1da177e4 | 801 | case CAPI_GET_PROFILE: |
475be4d8 JP |
802 | if (copy_from_user(&data.contr, argp, |
803 | sizeof(data.contr))) | |
804 | return -EFAULT; | |
1da177e4 | 805 | |
475be4d8 JP |
806 | if (data.contr == 0) { |
807 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); | |
808 | if (cdev->errcode) | |
809 | return -EIO; | |
1da177e4 | 810 | |
475be4d8 JP |
811 | retval = copy_to_user(argp, |
812 | &data.profile.ncontroller, | |
813 | sizeof(data.profile.ncontroller)); | |
1da177e4 | 814 | |
475be4d8 JP |
815 | } else { |
816 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); | |
817 | if (cdev->errcode) | |
818 | return -EIO; | |
1da177e4 | 819 | |
475be4d8 JP |
820 | retval = copy_to_user(argp, &data.profile, |
821 | sizeof(data.profile)); | |
1da177e4 | 822 | } |
475be4d8 JP |
823 | if (retval) |
824 | return -EFAULT; | |
7fdaadcc | 825 | return 0; |
1da177e4 LT |
826 | |
827 | case CAPI_GET_MANUFACTURER: | |
475be4d8 JP |
828 | if (copy_from_user(&data.contr, argp, |
829 | sizeof(data.contr))) | |
830 | return -EFAULT; | |
831 | cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer); | |
832 | if (cdev->errcode) | |
833 | return -EIO; | |
1da177e4 | 834 | |
475be4d8 JP |
835 | if (copy_to_user(argp, data.manufacturer, |
836 | sizeof(data.manufacturer))) | |
837 | return -EFAULT; | |
1da177e4 | 838 | |
7fdaadcc TS |
839 | return 0; |
840 | ||
1da177e4 LT |
841 | case CAPI_GET_ERRCODE: |
842 | data.errcode = cdev->errcode; | |
843 | cdev->errcode = CAPI_NOERROR; | |
844 | if (arg) { | |
845 | if (copy_to_user(argp, &data.errcode, | |
846 | sizeof(data.errcode))) | |
847 | return -EFAULT; | |
848 | } | |
849 | return data.errcode; | |
850 | ||
851 | case CAPI_INSTALLED: | |
852 | if (capi20_isinstalled() == CAPI_NOERROR) | |
853 | return 0; | |
854 | return -ENXIO; | |
855 | ||
7fdaadcc | 856 | case CAPI_MANUFACTURER_CMD: { |
475be4d8 JP |
857 | struct capi_manufacturer_cmd mcmd; |
858 | if (!capable(CAP_SYS_ADMIN)) | |
859 | return -EPERM; | |
860 | if (copy_from_user(&mcmd, argp, sizeof(mcmd))) | |
861 | return -EFAULT; | |
862 | return capi20_manufacturer(mcmd.cmd, mcmd.data); | |
863 | } | |
1da177e4 | 864 | case CAPI_SET_FLAGS: |
05b41494 JK |
865 | case CAPI_CLR_FLAGS: { |
866 | unsigned userflags; | |
867 | ||
868 | if (copy_from_user(&userflags, argp, sizeof(userflags))) | |
869 | return -EFAULT; | |
1da177e4 | 870 | |
05b41494 JK |
871 | mutex_lock(&cdev->lock); |
872 | if (cmd == CAPI_SET_FLAGS) | |
873 | cdev->userflags |= userflags; | |
874 | else | |
875 | cdev->userflags &= ~userflags; | |
876 | mutex_unlock(&cdev->lock); | |
877 | return 0; | |
878 | } | |
1da177e4 LT |
879 | case CAPI_GET_FLAGS: |
880 | if (copy_to_user(argp, &cdev->userflags, | |
881 | sizeof(cdev->userflags))) | |
882 | return -EFAULT; | |
883 | return 0; | |
884 | ||
7dc2ce5f TS |
885 | #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE |
886 | case CAPI_NCCI_OPENCOUNT: | |
887 | return 0; | |
888 | ||
889 | #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
05b41494 JK |
890 | case CAPI_NCCI_OPENCOUNT: { |
891 | struct capincci *nccip; | |
892 | unsigned ncci; | |
893 | int count = 0; | |
1da177e4 | 894 | |
05b41494 JK |
895 | if (copy_from_user(&ncci, argp, sizeof(ncci))) |
896 | return -EFAULT; | |
897 | ||
898 | mutex_lock(&cdev->lock); | |
899 | nccip = capincci_find(cdev, (u32)ncci); | |
900 | if (nccip) | |
901 | count = capincci_minor_opencount(nccip); | |
902 | mutex_unlock(&cdev->lock); | |
903 | return count; | |
904 | } | |
1da177e4 | 905 | |
05b41494 JK |
906 | case CAPI_NCCI_GETUNIT: { |
907 | struct capincci *nccip; | |
908 | struct capiminor *mp; | |
909 | unsigned ncci; | |
910 | int unit = -ESRCH; | |
911 | ||
912 | if (copy_from_user(&ncci, argp, sizeof(ncci))) | |
913 | return -EFAULT; | |
914 | ||
915 | mutex_lock(&cdev->lock); | |
916 | nccip = capincci_find(cdev, (u32)ncci); | |
917 | if (nccip) { | |
918 | mp = nccip->minorp; | |
919 | if (mp) | |
920 | unit = mp->minor; | |
1da177e4 | 921 | } |
05b41494 JK |
922 | mutex_unlock(&cdev->lock); |
923 | return unit; | |
924 | } | |
1da177e4 | 925 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
05b41494 JK |
926 | |
927 | default: | |
928 | return -EINVAL; | |
1da177e4 | 929 | } |
1da177e4 LT |
930 | } |
931 | ||
703c631e AB |
932 | static long |
933 | capi_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
934 | { | |
935 | int ret; | |
936 | ||
76a64921 | 937 | mutex_lock(&capi_mutex); |
703c631e | 938 | ret = capi_ioctl(file, cmd, arg); |
76a64921 | 939 | mutex_unlock(&capi_mutex); |
703c631e AB |
940 | |
941 | return ret; | |
942 | } | |
943 | ||
eca39dd8 | 944 | static int capi_open(struct inode *inode, struct file *file) |
1da177e4 | 945 | { |
eca39dd8 JK |
946 | struct capidev *cdev; |
947 | ||
948 | cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); | |
949 | if (!cdev) | |
950 | return -ENOMEM; | |
951 | ||
05b41494 | 952 | mutex_init(&cdev->lock); |
eca39dd8 JK |
953 | skb_queue_head_init(&cdev->recvqueue); |
954 | init_waitqueue_head(&cdev->recvwait); | |
884f5c44 | 955 | INIT_LIST_HEAD(&cdev->nccis); |
eca39dd8 JK |
956 | file->private_data = cdev; |
957 | ||
958 | mutex_lock(&capidev_list_lock); | |
959 | list_add_tail(&cdev->list, &capidev_list); | |
960 | mutex_unlock(&capidev_list_lock); | |
961 | ||
962 | return nonseekable_open(inode, file); | |
1da177e4 LT |
963 | } |
964 | ||
eca39dd8 | 965 | static int capi_release(struct inode *inode, struct file *file) |
1da177e4 | 966 | { |
eca39dd8 | 967 | struct capidev *cdev = file->private_data; |
1da177e4 | 968 | |
eca39dd8 JK |
969 | mutex_lock(&capidev_list_lock); |
970 | list_del(&cdev->list); | |
971 | mutex_unlock(&capidev_list_lock); | |
972 | ||
05b41494 | 973 | if (cdev->ap.applid) |
eca39dd8 | 974 | capi20_release(&cdev->ap); |
eca39dd8 | 975 | skb_queue_purge(&cdev->recvqueue); |
eca39dd8 | 976 | capincci_free(cdev, 0xffffffff); |
eca39dd8 JK |
977 | |
978 | kfree(cdev); | |
1da177e4 LT |
979 | return 0; |
980 | } | |
981 | ||
2b8693c0 | 982 | static const struct file_operations capi_fops = |
1da177e4 LT |
983 | { |
984 | .owner = THIS_MODULE, | |
985 | .llseek = no_llseek, | |
986 | .read = capi_read, | |
987 | .write = capi_write, | |
988 | .poll = capi_poll, | |
703c631e | 989 | .unlocked_ioctl = capi_unlocked_ioctl, |
1da177e4 LT |
990 | .open = capi_open, |
991 | .release = capi_release, | |
992 | }; | |
993 | ||
994 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
995 | /* -------- tty_operations for capincci ----------------------------- */ | |
996 | ||
46324511 JK |
997 | static int |
998 | capinc_tty_install(struct tty_driver *driver, struct tty_struct *tty) | |
1da177e4 | 999 | { |
410235fd | 1000 | struct capiminor *mp = capiminor_get(tty->index); |
81f5835e | 1001 | int ret = tty_standard_install(driver, tty); |
46324511 | 1002 | |
81f5835e | 1003 | if (ret == 0) |
46324511 | 1004 | tty->driver_data = mp; |
81f5835e | 1005 | else |
46324511 JK |
1006 | capiminor_put(mp); |
1007 | return ret; | |
1008 | } | |
1da177e4 | 1009 | |
46324511 JK |
1010 | static void capinc_tty_cleanup(struct tty_struct *tty) |
1011 | { | |
1012 | struct capiminor *mp = tty->driver_data; | |
1013 | tty->driver_data = NULL; | |
1014 | capiminor_put(mp); | |
1015 | } | |
1da177e4 | 1016 | |
fb4b4881 | 1017 | static int capinc_tty_open(struct tty_struct *tty, struct file *filp) |
46324511 JK |
1018 | { |
1019 | struct capiminor *mp = tty->driver_data; | |
fb4b4881 JK |
1020 | int err; |
1021 | ||
1022 | err = tty_port_open(&mp->port, tty, filp); | |
1023 | if (err) | |
1024 | return err; | |
1da177e4 | 1025 | |
1da177e4 LT |
1026 | handle_minor_recv(mp); |
1027 | return 0; | |
1028 | } | |
1029 | ||
fb4b4881 | 1030 | static void capinc_tty_close(struct tty_struct *tty, struct file *filp) |
1da177e4 | 1031 | { |
46324511 | 1032 | struct capiminor *mp = tty->driver_data; |
1da177e4 | 1033 | |
fb4b4881 | 1034 | tty_port_close(&mp->port, tty, filp); |
1da177e4 LT |
1035 | } |
1036 | ||
6576c289 | 1037 | static int capinc_tty_write(struct tty_struct *tty, |
1da177e4 LT |
1038 | const unsigned char *buf, int count) |
1039 | { | |
2c8df722 | 1040 | struct capiminor *mp = tty->driver_data; |
1da177e4 LT |
1041 | struct sk_buff *skb; |
1042 | ||
8fb53b95 | 1043 | pr_debug("capinc_tty_write(count=%d)\n", count); |
1da177e4 | 1044 | |
dfbb84ff JK |
1045 | spin_lock_bh(&mp->outlock); |
1046 | skb = mp->outskb; | |
1da177e4 | 1047 | if (skb) { |
dfbb84ff JK |
1048 | mp->outskb = NULL; |
1049 | __skb_queue_tail(&mp->outqueue, skb); | |
1da177e4 LT |
1050 | mp->outbytes += skb->len; |
1051 | } | |
1052 | ||
475be4d8 | 1053 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN + count, GFP_ATOMIC); |
1da177e4 LT |
1054 | if (!skb) { |
1055 | printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n"); | |
dfbb84ff | 1056 | spin_unlock_bh(&mp->outlock); |
1da177e4 LT |
1057 | return -ENOMEM; |
1058 | } | |
1059 | ||
1060 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); | |
1061 | memcpy(skb_put(skb, count), buf, count); | |
1062 | ||
dfbb84ff | 1063 | __skb_queue_tail(&mp->outqueue, skb); |
1da177e4 | 1064 | mp->outbytes += skb->len; |
dfbb84ff JK |
1065 | spin_unlock_bh(&mp->outlock); |
1066 | ||
eef0ced0 | 1067 | handle_minor_send(mp); |
dfbb84ff | 1068 | |
1da177e4 LT |
1069 | return count; |
1070 | } | |
1071 | ||
f2545a75 | 1072 | static int capinc_tty_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 1073 | { |
2c8df722 | 1074 | struct capiminor *mp = tty->driver_data; |
dfbb84ff | 1075 | bool invoke_send = false; |
1da177e4 | 1076 | struct sk_buff *skb; |
f2545a75 | 1077 | int ret = 1; |
1da177e4 | 1078 | |
8fb53b95 | 1079 | pr_debug("capinc_put_char(%u)\n", ch); |
1da177e4 | 1080 | |
dfbb84ff JK |
1081 | spin_lock_bh(&mp->outlock); |
1082 | skb = mp->outskb; | |
1da177e4 LT |
1083 | if (skb) { |
1084 | if (skb_tailroom(skb) > 0) { | |
1085 | *(skb_put(skb, 1)) = ch; | |
dfbb84ff | 1086 | goto unlock_out; |
1da177e4 | 1087 | } |
dfbb84ff JK |
1088 | mp->outskb = NULL; |
1089 | __skb_queue_tail(&mp->outqueue, skb); | |
1da177e4 | 1090 | mp->outbytes += skb->len; |
dfbb84ff | 1091 | invoke_send = true; |
1da177e4 | 1092 | } |
dfbb84ff | 1093 | |
475be4d8 | 1094 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN + CAPI_MAX_BLKSIZE, GFP_ATOMIC); |
1da177e4 LT |
1095 | if (skb) { |
1096 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); | |
1097 | *(skb_put(skb, 1)) = ch; | |
dfbb84ff | 1098 | mp->outskb = skb; |
1da177e4 LT |
1099 | } else { |
1100 | printk(KERN_ERR "capinc_put_char: char %u lost\n", ch); | |
f2545a75 | 1101 | ret = 0; |
1da177e4 | 1102 | } |
dfbb84ff JK |
1103 | |
1104 | unlock_out: | |
1105 | spin_unlock_bh(&mp->outlock); | |
1106 | ||
1107 | if (invoke_send) | |
eef0ced0 | 1108 | handle_minor_send(mp); |
dfbb84ff | 1109 | |
f2545a75 | 1110 | return ret; |
1da177e4 LT |
1111 | } |
1112 | ||
1113 | static void capinc_tty_flush_chars(struct tty_struct *tty) | |
1114 | { | |
2c8df722 | 1115 | struct capiminor *mp = tty->driver_data; |
1da177e4 LT |
1116 | struct sk_buff *skb; |
1117 | ||
8fb53b95 | 1118 | pr_debug("capinc_tty_flush_chars\n"); |
1da177e4 | 1119 | |
dfbb84ff JK |
1120 | spin_lock_bh(&mp->outlock); |
1121 | skb = mp->outskb; | |
1da177e4 | 1122 | if (skb) { |
dfbb84ff JK |
1123 | mp->outskb = NULL; |
1124 | __skb_queue_tail(&mp->outqueue, skb); | |
1da177e4 | 1125 | mp->outbytes += skb->len; |
dfbb84ff JK |
1126 | spin_unlock_bh(&mp->outlock); |
1127 | ||
eef0ced0 | 1128 | handle_minor_send(mp); |
dfbb84ff JK |
1129 | } else |
1130 | spin_unlock_bh(&mp->outlock); | |
1131 | ||
1132 | handle_minor_recv(mp); | |
1da177e4 LT |
1133 | } |
1134 | ||
1135 | static int capinc_tty_write_room(struct tty_struct *tty) | |
1136 | { | |
2c8df722 | 1137 | struct capiminor *mp = tty->driver_data; |
1da177e4 | 1138 | int room; |
2c8df722 | 1139 | |
1da177e4 LT |
1140 | room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue); |
1141 | room *= CAPI_MAX_BLKSIZE; | |
8fb53b95 | 1142 | pr_debug("capinc_tty_write_room = %d\n", room); |
1da177e4 LT |
1143 | return room; |
1144 | } | |
1145 | ||
408b664a | 1146 | static int capinc_tty_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1147 | { |
2c8df722 JK |
1148 | struct capiminor *mp = tty->driver_data; |
1149 | ||
8fb53b95 DM |
1150 | pr_debug("capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n", |
1151 | mp->outbytes, mp->nack, | |
1152 | skb_queue_len(&mp->outqueue), | |
1153 | skb_queue_len(&mp->inqueue)); | |
1da177e4 LT |
1154 | return mp->outbytes; |
1155 | } | |
1156 | ||
6caa76b7 | 1157 | static int capinc_tty_ioctl(struct tty_struct *tty, |
475be4d8 | 1158 | unsigned int cmd, unsigned long arg) |
1da177e4 | 1159 | { |
6caa76b7 | 1160 | return -ENOIOCTLCMD; |
1da177e4 LT |
1161 | } |
1162 | ||
475be4d8 | 1163 | static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios *old) |
1da177e4 | 1164 | { |
8fb53b95 | 1165 | pr_debug("capinc_tty_set_termios\n"); |
1da177e4 LT |
1166 | } |
1167 | ||
2c8df722 | 1168 | static void capinc_tty_throttle(struct tty_struct *tty) |
1da177e4 | 1169 | { |
2c8df722 | 1170 | struct capiminor *mp = tty->driver_data; |
8fb53b95 | 1171 | pr_debug("capinc_tty_throttle\n"); |
2c8df722 | 1172 | mp->ttyinstop = 1; |
1da177e4 LT |
1173 | } |
1174 | ||
2c8df722 | 1175 | static void capinc_tty_unthrottle(struct tty_struct *tty) |
1da177e4 | 1176 | { |
2c8df722 | 1177 | struct capiminor *mp = tty->driver_data; |
2c8df722 | 1178 | |
8fb53b95 | 1179 | pr_debug("capinc_tty_unthrottle\n"); |
2c8df722 JK |
1180 | mp->ttyinstop = 0; |
1181 | handle_minor_recv(mp); | |
1da177e4 LT |
1182 | } |
1183 | ||
1184 | static void capinc_tty_stop(struct tty_struct *tty) | |
1185 | { | |
2c8df722 JK |
1186 | struct capiminor *mp = tty->driver_data; |
1187 | ||
8fb53b95 | 1188 | pr_debug("capinc_tty_stop\n"); |
2c8df722 | 1189 | mp->ttyoutstop = 1; |
1da177e4 LT |
1190 | } |
1191 | ||
1192 | static void capinc_tty_start(struct tty_struct *tty) | |
1193 | { | |
2c8df722 | 1194 | struct capiminor *mp = tty->driver_data; |
2c8df722 | 1195 | |
8fb53b95 | 1196 | pr_debug("capinc_tty_start\n"); |
2c8df722 | 1197 | mp->ttyoutstop = 0; |
eef0ced0 | 1198 | handle_minor_send(mp); |
1da177e4 LT |
1199 | } |
1200 | ||
1201 | static void capinc_tty_hangup(struct tty_struct *tty) | |
1202 | { | |
fb4b4881 JK |
1203 | struct capiminor *mp = tty->driver_data; |
1204 | ||
8fb53b95 | 1205 | pr_debug("capinc_tty_hangup\n"); |
fb4b4881 | 1206 | tty_port_hangup(&mp->port); |
1da177e4 LT |
1207 | } |
1208 | ||
9e98966c | 1209 | static int capinc_tty_break_ctl(struct tty_struct *tty, int state) |
1da177e4 | 1210 | { |
8fb53b95 | 1211 | pr_debug("capinc_tty_break_ctl(%d)\n", state); |
9e98966c | 1212 | return 0; |
1da177e4 LT |
1213 | } |
1214 | ||
1215 | static void capinc_tty_flush_buffer(struct tty_struct *tty) | |
1216 | { | |
8fb53b95 | 1217 | pr_debug("capinc_tty_flush_buffer\n"); |
1da177e4 LT |
1218 | } |
1219 | ||
1220 | static void capinc_tty_set_ldisc(struct tty_struct *tty) | |
1221 | { | |
8fb53b95 | 1222 | pr_debug("capinc_tty_set_ldisc\n"); |
1da177e4 LT |
1223 | } |
1224 | ||
1225 | static void capinc_tty_send_xchar(struct tty_struct *tty, char ch) | |
1226 | { | |
8fb53b95 | 1227 | pr_debug("capinc_tty_send_xchar(%d)\n", ch); |
1da177e4 LT |
1228 | } |
1229 | ||
b68e31d0 | 1230 | static const struct tty_operations capinc_ops = { |
1da177e4 LT |
1231 | .open = capinc_tty_open, |
1232 | .close = capinc_tty_close, | |
1233 | .write = capinc_tty_write, | |
1234 | .put_char = capinc_tty_put_char, | |
1235 | .flush_chars = capinc_tty_flush_chars, | |
1236 | .write_room = capinc_tty_write_room, | |
1237 | .chars_in_buffer = capinc_tty_chars_in_buffer, | |
1238 | .ioctl = capinc_tty_ioctl, | |
1239 | .set_termios = capinc_tty_set_termios, | |
1240 | .throttle = capinc_tty_throttle, | |
1241 | .unthrottle = capinc_tty_unthrottle, | |
1242 | .stop = capinc_tty_stop, | |
1243 | .start = capinc_tty_start, | |
1244 | .hangup = capinc_tty_hangup, | |
1245 | .break_ctl = capinc_tty_break_ctl, | |
1246 | .flush_buffer = capinc_tty_flush_buffer, | |
1247 | .set_ldisc = capinc_tty_set_ldisc, | |
1248 | .send_xchar = capinc_tty_send_xchar, | |
46324511 JK |
1249 | .install = capinc_tty_install, |
1250 | .cleanup = capinc_tty_cleanup, | |
1da177e4 LT |
1251 | }; |
1252 | ||
e76b1544 | 1253 | static int __init capinc_tty_init(void) |
1da177e4 LT |
1254 | { |
1255 | struct tty_driver *drv; | |
e76b1544 JK |
1256 | int err; |
1257 | ||
1da177e4 LT |
1258 | if (capi_ttyminors > CAPINC_MAX_PORTS) |
1259 | capi_ttyminors = CAPINC_MAX_PORTS; | |
1260 | if (capi_ttyminors <= 0) | |
1261 | capi_ttyminors = CAPINC_NR_PORTS; | |
1262 | ||
81d17fe5 JK |
1263 | capiminors = kzalloc(sizeof(struct capi_minor *) * capi_ttyminors, |
1264 | GFP_KERNEL); | |
1265 | if (!capiminors) | |
1da177e4 LT |
1266 | return -ENOMEM; |
1267 | ||
81d17fe5 JK |
1268 | drv = alloc_tty_driver(capi_ttyminors); |
1269 | if (!drv) { | |
1270 | kfree(capiminors); | |
1271 | return -ENOMEM; | |
1272 | } | |
1da177e4 | 1273 | drv->driver_name = "capi_nc"; |
1da177e4 | 1274 | drv->name = "capi"; |
e95ac143 | 1275 | drv->major = 0; |
1da177e4 LT |
1276 | drv->minor_start = 0; |
1277 | drv->type = TTY_DRIVER_TYPE_SERIAL; | |
1278 | drv->subtype = SERIAL_TYPE_NORMAL; | |
1279 | drv->init_termios = tty_std_termios; | |
1280 | drv->init_termios.c_iflag = ICRNL; | |
1281 | drv->init_termios.c_oflag = OPOST | ONLCR; | |
1282 | drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
1283 | drv->init_termios.c_lflag = 0; | |
40fb2d0d JK |
1284 | drv->flags = |
1285 | TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS | | |
1286 | TTY_DRIVER_DYNAMIC_DEV; | |
1da177e4 | 1287 | tty_set_operations(drv, &capinc_ops); |
e76b1544 JK |
1288 | |
1289 | err = tty_register_driver(drv); | |
1290 | if (err) { | |
1da177e4 | 1291 | put_tty_driver(drv); |
81d17fe5 | 1292 | kfree(capiminors); |
1da177e4 | 1293 | printk(KERN_ERR "Couldn't register capi_nc driver\n"); |
e76b1544 | 1294 | return err; |
1da177e4 LT |
1295 | } |
1296 | capinc_tty_driver = drv; | |
1297 | return 0; | |
1298 | } | |
1299 | ||
e76b1544 | 1300 | static void __exit capinc_tty_exit(void) |
1da177e4 | 1301 | { |
e76b1544 JK |
1302 | tty_unregister_driver(capinc_tty_driver); |
1303 | put_tty_driver(capinc_tty_driver); | |
81d17fe5 | 1304 | kfree(capiminors); |
1da177e4 LT |
1305 | } |
1306 | ||
501c87a9 JK |
1307 | #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
1308 | ||
1309 | static inline int capinc_tty_init(void) | |
1310 | { | |
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | static inline void capinc_tty_exit(void) { } | |
1315 | ||
1316 | #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
1da177e4 LT |
1317 | |
1318 | /* -------- /proc functions ----------------------------------------- */ | |
1319 | ||
1320 | /* | |
1321 | * /proc/capi/capi20: | |
1322 | * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt | |
1323 | */ | |
9a58a80a | 1324 | static int capi20_proc_show(struct seq_file *m, void *v) |
1da177e4 | 1325 | { |
475be4d8 | 1326 | struct capidev *cdev; |
1da177e4 | 1327 | struct list_head *l; |
1da177e4 | 1328 | |
b8f433dc | 1329 | mutex_lock(&capidev_list_lock); |
1da177e4 LT |
1330 | list_for_each(l, &capidev_list) { |
1331 | cdev = list_entry(l, struct capidev, list); | |
9a58a80a | 1332 | seq_printf(m, "0 %d %lu %lu %lu %lu\n", |
475be4d8 JP |
1333 | cdev->ap.applid, |
1334 | cdev->ap.nrecvctlpkt, | |
1335 | cdev->ap.nrecvdatapkt, | |
1336 | cdev->ap.nsentctlpkt, | |
1337 | cdev->ap.nsentdatapkt); | |
1da177e4 | 1338 | } |
b8f433dc | 1339 | mutex_unlock(&capidev_list_lock); |
9a58a80a | 1340 | return 0; |
1da177e4 LT |
1341 | } |
1342 | ||
9a58a80a AD |
1343 | static int capi20_proc_open(struct inode *inode, struct file *file) |
1344 | { | |
1345 | return single_open(file, capi20_proc_show, NULL); | |
1346 | } | |
1347 | ||
1348 | static const struct file_operations capi20_proc_fops = { | |
1349 | .owner = THIS_MODULE, | |
1350 | .open = capi20_proc_open, | |
1351 | .read = seq_read, | |
1352 | .llseek = seq_lseek, | |
1353 | .release = single_release, | |
1354 | }; | |
1355 | ||
1da177e4 LT |
1356 | /* |
1357 | * /proc/capi/capi20ncci: | |
1358 | * applid ncci | |
1359 | */ | |
9a58a80a | 1360 | static int capi20ncci_proc_show(struct seq_file *m, void *v) |
1da177e4 | 1361 | { |
884f5c44 JK |
1362 | struct capidev *cdev; |
1363 | struct capincci *np; | |
1da177e4 | 1364 | |
b8f433dc | 1365 | mutex_lock(&capidev_list_lock); |
884f5c44 | 1366 | list_for_each_entry(cdev, &capidev_list, list) { |
05b41494 | 1367 | mutex_lock(&cdev->lock); |
884f5c44 JK |
1368 | list_for_each_entry(np, &cdev->nccis, list) |
1369 | seq_printf(m, "%d 0x%x\n", cdev->ap.applid, np->ncci); | |
05b41494 | 1370 | mutex_unlock(&cdev->lock); |
1da177e4 | 1371 | } |
b8f433dc | 1372 | mutex_unlock(&capidev_list_lock); |
9a58a80a | 1373 | return 0; |
1da177e4 LT |
1374 | } |
1375 | ||
9a58a80a AD |
1376 | static int capi20ncci_proc_open(struct inode *inode, struct file *file) |
1377 | { | |
1378 | return single_open(file, capi20ncci_proc_show, NULL); | |
1379 | } | |
1380 | ||
1381 | static const struct file_operations capi20ncci_proc_fops = { | |
1382 | .owner = THIS_MODULE, | |
1383 | .open = capi20ncci_proc_open, | |
1384 | .read = seq_read, | |
1385 | .llseek = seq_lseek, | |
1386 | .release = single_release, | |
1da177e4 LT |
1387 | }; |
1388 | ||
1389 | static void __init proc_init(void) | |
1390 | { | |
9a58a80a AD |
1391 | proc_create("capi/capi20", 0, NULL, &capi20_proc_fops); |
1392 | proc_create("capi/capi20ncci", 0, NULL, &capi20ncci_proc_fops); | |
1da177e4 LT |
1393 | } |
1394 | ||
1395 | static void __exit proc_exit(void) | |
1396 | { | |
9a58a80a AD |
1397 | remove_proc_entry("capi/capi20", NULL); |
1398 | remove_proc_entry("capi/capi20ncci", NULL); | |
1da177e4 LT |
1399 | } |
1400 | ||
1401 | /* -------- init function and module interface ---------------------- */ | |
1402 | ||
1403 | ||
1da177e4 LT |
1404 | static int __init capi_init(void) |
1405 | { | |
88549d6b | 1406 | const char *compileinfo; |
6d9eac34 | 1407 | int major_ret; |
1da177e4 | 1408 | |
6d9eac34 AM |
1409 | major_ret = register_chrdev(capi_major, "capi20", &capi_fops); |
1410 | if (major_ret < 0) { | |
1da177e4 | 1411 | printk(KERN_ERR "capi20: unable to get major %d\n", capi_major); |
6d9eac34 | 1412 | return major_ret; |
1da177e4 | 1413 | } |
56b22935 | 1414 | capi_class = class_create(THIS_MODULE, "capi"); |
1da177e4 LT |
1415 | if (IS_ERR(capi_class)) { |
1416 | unregister_chrdev(capi_major, "capi20"); | |
1417 | return PTR_ERR(capi_class); | |
1418 | } | |
1419 | ||
a9b12619 | 1420 | device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi"); |
1da177e4 | 1421 | |
1da177e4 | 1422 | if (capinc_tty_init() < 0) { |
d78b0368 | 1423 | device_destroy(capi_class, MKDEV(capi_major, 0)); |
56b22935 | 1424 | class_destroy(capi_class); |
1da177e4 LT |
1425 | unregister_chrdev(capi_major, "capi20"); |
1426 | return -ENOMEM; | |
1427 | } | |
1da177e4 LT |
1428 | |
1429 | proc_init(); | |
1430 | ||
1f90d665 | 1431 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
475be4d8 | 1432 | compileinfo = " (middleware)"; |
1da177e4 | 1433 | #else |
475be4d8 | 1434 | compileinfo = " (no middleware)"; |
1da177e4 | 1435 | #endif |
88549d6b JK |
1436 | printk(KERN_NOTICE "CAPI 2.0 started up with major %d%s\n", |
1437 | capi_major, compileinfo); | |
1da177e4 LT |
1438 | |
1439 | return 0; | |
1440 | } | |
1441 | ||
1442 | static void __exit capi_exit(void) | |
1443 | { | |
1444 | proc_exit(); | |
1445 | ||
d78b0368 | 1446 | device_destroy(capi_class, MKDEV(capi_major, 0)); |
56b22935 | 1447 | class_destroy(capi_class); |
1da177e4 | 1448 | unregister_chrdev(capi_major, "capi20"); |
1da177e4 | 1449 | |
1da177e4 | 1450 | capinc_tty_exit(); |
1da177e4 LT |
1451 | } |
1452 | ||
1453 | module_init(capi_init); | |
1454 | module_exit(capi_exit); |