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 { |
0159d549 JK |
80 | struct kref kref; |
81 | ||
1da177e4 LT |
82 | unsigned int minor; |
83 | ||
42792713 JK |
84 | struct capi20_appl *ap; |
85 | u32 ncci; | |
86 | atomic_t datahandle; | |
87 | atomic_t msgid; | |
1da177e4 | 88 | |
fb4b4881 | 89 | struct tty_port port; |
1da177e4 LT |
90 | int ttyinstop; |
91 | int ttyoutstop; | |
1da177e4 | 92 | |
dfbb84ff JK |
93 | struct sk_buff_head inqueue; |
94 | ||
95 | struct sk_buff_head outqueue; | |
96 | int outbytes; | |
97 | struct sk_buff *outskb; | |
98 | spinlock_t outlock; | |
1da177e4 LT |
99 | |
100 | /* transmit path */ | |
6aa65472 | 101 | struct list_head ackqueue; |
1da177e4 | 102 | int nack; |
6aa65472 | 103 | spinlock_t ackqlock; |
1da177e4 | 104 | }; |
1da177e4 LT |
105 | |
106 | struct capincci { | |
884f5c44 | 107 | struct list_head list; |
1da177e4 LT |
108 | u32 ncci; |
109 | struct capidev *cdev; | |
110 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
111 | struct capiminor *minorp; | |
112 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
113 | }; | |
114 | ||
115 | struct capidev { | |
116 | struct list_head list; | |
117 | struct capi20_appl ap; | |
118 | u16 errcode; | |
119 | unsigned userflags; | |
120 | ||
121 | struct sk_buff_head recvqueue; | |
122 | wait_queue_head_t recvwait; | |
123 | ||
884f5c44 | 124 | struct list_head nccis; |
1da177e4 | 125 | |
05b41494 | 126 | struct mutex lock; |
1da177e4 LT |
127 | }; |
128 | ||
129 | /* -------- global variables ---------------------------------------- */ | |
130 | ||
b8f433dc | 131 | static DEFINE_MUTEX(capidev_list_lock); |
1da177e4 LT |
132 | static LIST_HEAD(capidev_list); |
133 | ||
134 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
501c87a9 | 135 | |
3d5d30fe | 136 | static DEFINE_SPINLOCK(capiminors_lock); |
81d17fe5 | 137 | static struct capiminor **capiminors; |
1da177e4 | 138 | |
40fb2d0d JK |
139 | static struct tty_driver *capinc_tty_driver; |
140 | ||
1da177e4 LT |
141 | /* -------- datahandles --------------------------------------------- */ |
142 | ||
501c87a9 | 143 | static int capiminor_add_ack(struct capiminor *mp, u16 datahandle) |
1da177e4 | 144 | { |
42651b5c | 145 | struct ackqueue_entry *n; |
1da177e4 LT |
146 | |
147 | n = kmalloc(sizeof(*n), GFP_ATOMIC); | |
6aa65472 MB |
148 | if (unlikely(!n)) { |
149 | printk(KERN_ERR "capi: alloc datahandle failed\n"); | |
150 | return -1; | |
1da177e4 | 151 | } |
1da177e4 | 152 | n->datahandle = datahandle; |
6aa65472 | 153 | INIT_LIST_HEAD(&n->list); |
2b72b5bd | 154 | spin_lock_bh(&mp->ackqlock); |
6aa65472 | 155 | list_add_tail(&n->list, &mp->ackqueue); |
1da177e4 | 156 | mp->nack++; |
2b72b5bd | 157 | spin_unlock_bh(&mp->ackqlock); |
1da177e4 LT |
158 | return 0; |
159 | } | |
160 | ||
161 | static int capiminor_del_ack(struct capiminor *mp, u16 datahandle) | |
162 | { | |
42651b5c | 163 | struct ackqueue_entry *p, *tmp; |
1da177e4 | 164 | |
2b72b5bd | 165 | spin_lock_bh(&mp->ackqlock); |
6aa65472 | 166 | list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { |
475be4d8 | 167 | if (p->datahandle == datahandle) { |
6aa65472 | 168 | list_del(&p->list); |
1da177e4 | 169 | mp->nack--; |
2b72b5bd JK |
170 | spin_unlock_bh(&mp->ackqlock); |
171 | kfree(p); | |
1da177e4 LT |
172 | return 0; |
173 | } | |
174 | } | |
2b72b5bd | 175 | spin_unlock_bh(&mp->ackqlock); |
1da177e4 LT |
176 | return -1; |
177 | } | |
178 | ||
179 | static void capiminor_del_all_ack(struct capiminor *mp) | |
180 | { | |
42651b5c | 181 | struct ackqueue_entry *p, *tmp; |
1da177e4 | 182 | |
6aa65472 MB |
183 | list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { |
184 | list_del(&p->list); | |
1da177e4 LT |
185 | kfree(p); |
186 | mp->nack--; | |
187 | } | |
188 | } | |
189 | ||
190 | ||
191 | /* -------- struct capiminor ---------------------------------------- */ | |
192 | ||
fb4b4881 JK |
193 | static const struct tty_port_operations capiminor_port_ops; /* we have none */ |
194 | ||
1da177e4 LT |
195 | static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci) |
196 | { | |
81d17fe5 | 197 | struct capiminor *mp; |
40fb2d0d | 198 | struct device *dev; |
81d17fe5 | 199 | unsigned int minor; |
1da177e4 | 200 | |
54f0fad3 | 201 | mp = kzalloc(sizeof(*mp), GFP_KERNEL); |
475be4d8 JP |
202 | if (!mp) { |
203 | printk(KERN_ERR "capi: can't alloc capiminor\n"); | |
1da177e4 LT |
204 | return NULL; |
205 | } | |
206 | ||
0159d549 JK |
207 | kref_init(&mp->kref); |
208 | ||
1da177e4 LT |
209 | mp->ap = ap; |
210 | mp->ncci = ncci; | |
6aa65472 MB |
211 | INIT_LIST_HEAD(&mp->ackqueue); |
212 | spin_lock_init(&mp->ackqlock); | |
1da177e4 LT |
213 | |
214 | skb_queue_head_init(&mp->inqueue); | |
215 | skb_queue_head_init(&mp->outqueue); | |
dfbb84ff | 216 | spin_lock_init(&mp->outlock); |
1da177e4 | 217 | |
fb4b4881 JK |
218 | tty_port_init(&mp->port); |
219 | mp->port.ops = &capiminor_port_ops; | |
220 | ||
81d17fe5 | 221 | /* Allocate the least unused minor number. */ |
3d5d30fe | 222 | spin_lock(&capiminors_lock); |
81d17fe5 JK |
223 | for (minor = 0; minor < capi_ttyminors; minor++) |
224 | if (!capiminors[minor]) { | |
225 | capiminors[minor] = mp; | |
226 | break; | |
1da177e4 | 227 | } |
3d5d30fe | 228 | spin_unlock(&capiminors_lock); |
1da177e4 | 229 | |
81d17fe5 | 230 | if (minor == capi_ttyminors) { |
1da177e4 | 231 | printk(KERN_NOTICE "capi: out of minors\n"); |
40fb2d0d | 232 | goto err_out1; |
1da177e4 LT |
233 | } |
234 | ||
81d17fe5 JK |
235 | mp->minor = minor; |
236 | ||
40fb2d0d JK |
237 | dev = tty_register_device(capinc_tty_driver, minor, NULL); |
238 | if (IS_ERR(dev)) | |
239 | goto err_out2; | |
240 | ||
1da177e4 | 241 | return mp; |
40fb2d0d JK |
242 | |
243 | err_out2: | |
3d5d30fe | 244 | spin_lock(&capiminors_lock); |
40fb2d0d | 245 | capiminors[minor] = NULL; |
3d5d30fe | 246 | spin_unlock(&capiminors_lock); |
40fb2d0d JK |
247 | |
248 | err_out1: | |
249 | kfree(mp); | |
250 | return NULL; | |
1da177e4 LT |
251 | } |
252 | ||
0159d549 | 253 | static void capiminor_destroy(struct kref *kref) |
1da177e4 | 254 | { |
0159d549 | 255 | struct capiminor *mp = container_of(kref, struct capiminor, kref); |
1da177e4 | 256 | |
dfbb84ff | 257 | kfree_skb(mp->outskb); |
1da177e4 LT |
258 | skb_queue_purge(&mp->inqueue); |
259 | skb_queue_purge(&mp->outqueue); | |
260 | capiminor_del_all_ack(mp); | |
261 | kfree(mp); | |
262 | } | |
263 | ||
40fb2d0d | 264 | static struct capiminor *capiminor_get(unsigned int minor) |
1da177e4 | 265 | { |
81d17fe5 | 266 | struct capiminor *mp; |
1da177e4 | 267 | |
3d5d30fe | 268 | spin_lock(&capiminors_lock); |
81d17fe5 | 269 | mp = capiminors[minor]; |
0159d549 JK |
270 | if (mp) |
271 | kref_get(&mp->kref); | |
3d5d30fe | 272 | spin_unlock(&capiminors_lock); |
81d17fe5 JK |
273 | |
274 | return mp; | |
1da177e4 | 275 | } |
1da177e4 | 276 | |
0159d549 JK |
277 | static inline void capiminor_put(struct capiminor *mp) |
278 | { | |
279 | kref_put(&mp->kref, capiminor_destroy); | |
280 | } | |
281 | ||
282 | static void capiminor_free(struct capiminor *mp) | |
283 | { | |
0159d549 JK |
284 | tty_unregister_device(capinc_tty_driver, mp->minor); |
285 | ||
3d5d30fe | 286 | spin_lock(&capiminors_lock); |
0159d549 | 287 | capiminors[mp->minor] = NULL; |
3d5d30fe | 288 | spin_unlock(&capiminors_lock); |
0159d549 JK |
289 | |
290 | capiminor_put(mp); | |
291 | } | |
292 | ||
1da177e4 LT |
293 | /* -------- struct capincci ----------------------------------------- */ |
294 | ||
501c87a9 | 295 | static void capincci_alloc_minor(struct capidev *cdev, struct capincci *np) |
1da177e4 | 296 | { |
1f90d665 JK |
297 | if (cdev->userflags & CAPIFLAG_HIGHJACKING) |
298 | np->minorp = capiminor_alloc(&cdev->ap, np->ncci); | |
501c87a9 JK |
299 | } |
300 | ||
301 | static void capincci_free_minor(struct capincci *np) | |
302 | { | |
303 | struct capiminor *mp = np->minorp; | |
fb4b4881 | 304 | struct tty_struct *tty; |
501c87a9 JK |
305 | |
306 | if (mp) { | |
fb4b4881 JK |
307 | tty = tty_port_tty_get(&mp->port); |
308 | if (tty) { | |
30bced91 | 309 | tty_vhangup(tty); |
fb4b4881 | 310 | tty_kref_put(tty); |
501c87a9 | 311 | } |
fb4b4881 JK |
312 | |
313 | capiminor_free(mp); | |
501c87a9 JK |
314 | } |
315 | } | |
316 | ||
317 | static inline unsigned int capincci_minor_opencount(struct capincci *np) | |
318 | { | |
319 | struct capiminor *mp = np->minorp; | |
a84fdf41 JK |
320 | unsigned int count = 0; |
321 | struct tty_struct *tty; | |
501c87a9 | 322 | |
a84fdf41 JK |
323 | if (mp) { |
324 | tty = tty_port_tty_get(&mp->port); | |
325 | if (tty) { | |
326 | count = tty->count; | |
327 | tty_kref_put(tty); | |
328 | } | |
329 | } | |
330 | return count; | |
501c87a9 JK |
331 | } |
332 | ||
333 | #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
334 | ||
335 | static inline void | |
336 | capincci_alloc_minor(struct capidev *cdev, struct capincci *np) { } | |
337 | static inline void capincci_free_minor(struct capincci *np) { } | |
338 | ||
339 | static inline unsigned int capincci_minor_opencount(struct capincci *np) | |
340 | { | |
341 | return 0; | |
342 | } | |
343 | ||
344 | #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
345 | ||
346 | static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci) | |
347 | { | |
884f5c44 | 348 | struct capincci *np; |
501c87a9 | 349 | |
54f0fad3 | 350 | np = kzalloc(sizeof(*np), GFP_KERNEL); |
501c87a9 JK |
351 | if (!np) |
352 | return NULL; | |
353 | np->ncci = ncci; | |
354 | np->cdev = cdev; | |
355 | ||
356 | capincci_alloc_minor(cdev, np); | |
357 | ||
884f5c44 JK |
358 | list_add_tail(&np->list, &cdev->nccis); |
359 | ||
360 | return np; | |
1da177e4 LT |
361 | } |
362 | ||
363 | static void capincci_free(struct capidev *cdev, u32 ncci) | |
364 | { | |
884f5c44 | 365 | struct capincci *np, *tmp; |
1da177e4 | 366 | |
884f5c44 | 367 | list_for_each_entry_safe(np, tmp, &cdev->nccis, list) |
1da177e4 | 368 | if (ncci == 0xffffffff || np->ncci == ncci) { |
501c87a9 | 369 | capincci_free_minor(np); |
884f5c44 | 370 | list_del(&np->list); |
1da177e4 | 371 | kfree(np); |
1da177e4 | 372 | } |
1da177e4 LT |
373 | } |
374 | ||
375 | static struct capincci *capincci_find(struct capidev *cdev, u32 ncci) | |
376 | { | |
884f5c44 | 377 | struct capincci *np; |
1da177e4 | 378 | |
884f5c44 JK |
379 | list_for_each_entry(np, &cdev->nccis, list) |
380 | if (np->ncci == ncci) | |
381 | return np; | |
382 | return NULL; | |
1da177e4 LT |
383 | } |
384 | ||
1da177e4 LT |
385 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
386 | /* -------- handle data queue --------------------------------------- */ | |
387 | ||
388 | static struct sk_buff * | |
389 | gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb) | |
390 | { | |
391 | struct sk_buff *nskb; | |
dfbb84ff | 392 | nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_KERNEL); |
1da177e4 | 393 | if (nskb) { |
475be4d8 | 394 | u16 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 4 + 2); |
1da177e4 LT |
395 | unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN); |
396 | capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN); | |
397 | capimsg_setu16(s, 2, mp->ap->applid); | |
398 | capimsg_setu8 (s, 4, CAPI_DATA_B3); | |
399 | capimsg_setu8 (s, 5, CAPI_RESP); | |
42792713 | 400 | capimsg_setu16(s, 6, atomic_inc_return(&mp->msgid)); |
1da177e4 LT |
401 | capimsg_setu32(s, 8, mp->ncci); |
402 | capimsg_setu16(s, 12, datahandle); | |
403 | } | |
404 | return nskb; | |
405 | } | |
406 | ||
407 | static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb) | |
408 | { | |
a11ef7be | 409 | unsigned int datalen = skb->len - CAPIMSG_LEN(skb->data); |
fb4b4881 | 410 | struct tty_struct *tty; |
1da177e4 | 411 | struct sk_buff *nskb; |
1da177e4 LT |
412 | u16 errcode, datahandle; |
413 | struct tty_ldisc *ld; | |
fb4b4881 JK |
414 | int ret = -1; |
415 | ||
fb4b4881 JK |
416 | tty = tty_port_tty_get(&mp->port); |
417 | if (!tty) { | |
8fb53b95 | 418 | pr_debug("capi: currently no receiver\n"); |
1da177e4 LT |
419 | return -1; |
420 | } | |
475be4d8 | 421 | |
fb4b4881 | 422 | ld = tty_ldisc_ref(tty); |
a11ef7be JK |
423 | if (!ld) { |
424 | /* fatal error, do not requeue */ | |
425 | ret = 0; | |
426 | kfree_skb(skb); | |
427 | goto deref_tty; | |
428 | } | |
fb4b4881 | 429 | |
a352def2 | 430 | if (ld->ops->receive_buf == NULL) { |
8fb53b95 | 431 | pr_debug("capi: ldisc has no receive_buf function\n"); |
a11ef7be JK |
432 | /* fatal error, do not requeue */ |
433 | goto free_skb; | |
1da177e4 LT |
434 | } |
435 | if (mp->ttyinstop) { | |
8fb53b95 | 436 | pr_debug("capi: recv tty throttled\n"); |
a11ef7be | 437 | goto deref_ldisc; |
1da177e4 | 438 | } |
a11ef7be | 439 | |
fb4b4881 | 440 | if (tty->receive_room < datalen) { |
8fb53b95 | 441 | pr_debug("capi: no room in tty\n"); |
a11ef7be | 442 | goto deref_ldisc; |
1da177e4 | 443 | } |
a11ef7be JK |
444 | |
445 | nskb = gen_data_b3_resp_for(mp, skb); | |
446 | if (!nskb) { | |
1da177e4 | 447 | printk(KERN_ERR "capi: gen_data_b3_resp failed\n"); |
a11ef7be | 448 | goto deref_ldisc; |
1da177e4 | 449 | } |
a11ef7be JK |
450 | |
451 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4); | |
452 | ||
1da177e4 | 453 | errcode = capi20_put_message(mp->ap, nskb); |
a11ef7be JK |
454 | |
455 | if (errcode == CAPI_NOERROR) { | |
456 | skb_pull(skb, CAPIMSG_LEN(skb->data)); | |
8fb53b95 DM |
457 | pr_debug("capi: DATA_B3_RESP %u len=%d => ldisc\n", |
458 | datahandle, skb->len); | |
a11ef7be JK |
459 | ld->ops->receive_buf(tty, skb->data, NULL, skb->len); |
460 | } else { | |
1da177e4 | 461 | printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n", |
475be4d8 | 462 | errcode); |
1da177e4 | 463 | kfree_skb(nskb); |
a11ef7be JK |
464 | |
465 | if (errcode == CAPI_SENDQUEUEFULL) | |
466 | goto deref_ldisc; | |
1da177e4 | 467 | } |
a11ef7be JK |
468 | |
469 | free_skb: | |
fb4b4881 | 470 | ret = 0; |
a11ef7be JK |
471 | kfree_skb(skb); |
472 | ||
473 | deref_ldisc: | |
1da177e4 | 474 | tty_ldisc_deref(ld); |
a11ef7be JK |
475 | |
476 | deref_tty: | |
fb4b4881 JK |
477 | tty_kref_put(tty); |
478 | return ret; | |
1da177e4 LT |
479 | } |
480 | ||
481 | static void handle_minor_recv(struct capiminor *mp) | |
482 | { | |
483 | struct sk_buff *skb; | |
68d7347b JK |
484 | |
485 | while ((skb = skb_dequeue(&mp->inqueue)) != NULL) | |
1da177e4 LT |
486 | if (handle_recv_skb(mp, skb) < 0) { |
487 | skb_queue_head(&mp->inqueue, skb); | |
1da177e4 LT |
488 | return; |
489 | } | |
1da177e4 LT |
490 | } |
491 | ||
eef0ced0 | 492 | static void handle_minor_send(struct capiminor *mp) |
1da177e4 | 493 | { |
fb4b4881 | 494 | struct tty_struct *tty; |
1da177e4 LT |
495 | struct sk_buff *skb; |
496 | u16 len; | |
1da177e4 LT |
497 | u16 errcode; |
498 | u16 datahandle; | |
499 | ||
fb4b4881 JK |
500 | tty = tty_port_tty_get(&mp->port); |
501 | if (!tty) | |
eef0ced0 | 502 | return; |
fb4b4881 JK |
503 | |
504 | if (mp->ttyoutstop) { | |
8fb53b95 | 505 | pr_debug("capi: send: tty stopped\n"); |
fb4b4881 | 506 | tty_kref_put(tty); |
eef0ced0 | 507 | return; |
1da177e4 LT |
508 | } |
509 | ||
dfbb84ff JK |
510 | while (1) { |
511 | spin_lock_bh(&mp->outlock); | |
512 | skb = __skb_dequeue(&mp->outqueue); | |
513 | if (!skb) { | |
514 | spin_unlock_bh(&mp->outlock); | |
515 | break; | |
516 | } | |
1da177e4 | 517 | len = (u16)skb->len; |
dfbb84ff JK |
518 | mp->outbytes -= len; |
519 | spin_unlock_bh(&mp->outlock); | |
520 | ||
521 | datahandle = atomic_inc_return(&mp->datahandle); | |
1da177e4 LT |
522 | skb_push(skb, CAPI_DATA_B3_REQ_LEN); |
523 | memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN); | |
524 | capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN); | |
525 | capimsg_setu16(skb->data, 2, mp->ap->applid); | |
526 | capimsg_setu8 (skb->data, 4, CAPI_DATA_B3); | |
527 | capimsg_setu8 (skb->data, 5, CAPI_REQ); | |
42792713 | 528 | capimsg_setu16(skb->data, 6, atomic_inc_return(&mp->msgid)); |
1da177e4 | 529 | capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */ |
5e6c20a9 | 530 | capimsg_setu32(skb->data, 12, (u32)(long)skb->data);/* Data32 */ |
1da177e4 LT |
531 | capimsg_setu16(skb->data, 16, len); /* Data length */ |
532 | capimsg_setu16(skb->data, 18, datahandle); | |
533 | capimsg_setu16(skb->data, 20, 0); /* Flags */ | |
534 | ||
501c87a9 | 535 | if (capiminor_add_ack(mp, datahandle) < 0) { |
1da177e4 | 536 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); |
dfbb84ff JK |
537 | |
538 | spin_lock_bh(&mp->outlock); | |
539 | __skb_queue_head(&mp->outqueue, skb); | |
540 | mp->outbytes += len; | |
541 | spin_unlock_bh(&mp->outlock); | |
542 | ||
eef0ced0 | 543 | break; |
1da177e4 LT |
544 | } |
545 | errcode = capi20_put_message(mp->ap, skb); | |
546 | if (errcode == CAPI_NOERROR) { | |
8fb53b95 DM |
547 | pr_debug("capi: DATA_B3_REQ %u len=%u\n", |
548 | datahandle, len); | |
1da177e4 LT |
549 | continue; |
550 | } | |
551 | capiminor_del_ack(mp, datahandle); | |
552 | ||
553 | if (errcode == CAPI_SENDQUEUEFULL) { | |
554 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); | |
dfbb84ff JK |
555 | |
556 | spin_lock_bh(&mp->outlock); | |
557 | __skb_queue_head(&mp->outqueue, skb); | |
558 | mp->outbytes += len; | |
559 | spin_unlock_bh(&mp->outlock); | |
560 | ||
1da177e4 LT |
561 | break; |
562 | } | |
563 | ||
564 | /* ups, drop packet */ | |
565 | printk(KERN_ERR "capi: put_message = %x\n", errcode); | |
1da177e4 LT |
566 | kfree_skb(skb); |
567 | } | |
fb4b4881 | 568 | tty_kref_put(tty); |
1da177e4 LT |
569 | } |
570 | ||
571 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
572 | /* -------- function called by lower level -------------------------- */ | |
573 | ||
574 | static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb) | |
575 | { | |
576 | struct capidev *cdev = ap->private; | |
577 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
fb4b4881 | 578 | struct tty_struct *tty; |
1da177e4 LT |
579 | struct capiminor *mp; |
580 | u16 datahandle; | |
581 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
582 | struct capincci *np; | |
1da177e4 | 583 | |
05b41494 JK |
584 | mutex_lock(&cdev->lock); |
585 | ||
1da177e4 LT |
586 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) { |
587 | u16 info = CAPIMSG_U16(skb->data, 12); // Info field | |
05b41494 | 588 | if ((info & 0xff00) == 0) |
1da177e4 | 589 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); |
1da177e4 | 590 | } |
05b41494 | 591 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) |
1da177e4 | 592 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); |
05b41494 | 593 | |
1da177e4 LT |
594 | if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) { |
595 | skb_queue_tail(&cdev->recvqueue, skb); | |
596 | wake_up_interruptible(&cdev->recvwait); | |
05b41494 | 597 | goto unlock_out; |
1da177e4 | 598 | } |
05b41494 JK |
599 | |
600 | np = capincci_find(cdev, CAPIMSG_CONTROL(skb->data)); | |
1da177e4 LT |
601 | if (!np) { |
602 | printk(KERN_ERR "BUG: capi_signal: ncci not found\n"); | |
603 | skb_queue_tail(&cdev->recvqueue, skb); | |
604 | wake_up_interruptible(&cdev->recvwait); | |
05b41494 | 605 | goto unlock_out; |
1da177e4 | 606 | } |
501c87a9 | 607 | |
1da177e4 LT |
608 | #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE |
609 | skb_queue_tail(&cdev->recvqueue, skb); | |
610 | wake_up_interruptible(&cdev->recvwait); | |
501c87a9 | 611 | |
1da177e4 | 612 | #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
501c87a9 | 613 | |
1da177e4 LT |
614 | mp = np->minorp; |
615 | if (!mp) { | |
616 | skb_queue_tail(&cdev->recvqueue, skb); | |
617 | wake_up_interruptible(&cdev->recvwait); | |
05b41494 | 618 | goto unlock_out; |
1da177e4 | 619 | } |
1da177e4 | 620 | if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) { |
475be4d8 | 621 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 4 + 2); |
8fb53b95 DM |
622 | pr_debug("capi_signal: DATA_B3_IND %u len=%d\n", |
623 | datahandle, skb->len-CAPIMSG_LEN(skb->data)); | |
1da177e4 | 624 | skb_queue_tail(&mp->inqueue, skb); |
68d7347b | 625 | |
1da177e4 LT |
626 | handle_minor_recv(mp); |
627 | ||
628 | } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) { | |
629 | ||
475be4d8 | 630 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4); |
8fb53b95 DM |
631 | pr_debug("capi_signal: DATA_B3_CONF %u 0x%x\n", |
632 | datahandle, | |
475be4d8 | 633 | CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 2)); |
1da177e4 | 634 | kfree_skb(skb); |
2b72b5bd | 635 | capiminor_del_ack(mp, datahandle); |
fb4b4881 JK |
636 | tty = tty_port_tty_get(&mp->port); |
637 | if (tty) { | |
638 | tty_wakeup(tty); | |
639 | tty_kref_put(tty); | |
640 | } | |
eef0ced0 | 641 | handle_minor_send(mp); |
1da177e4 LT |
642 | |
643 | } else { | |
644 | /* ups, let capi application handle it :-) */ | |
645 | skb_queue_tail(&cdev->recvqueue, skb); | |
646 | wake_up_interruptible(&cdev->recvwait); | |
647 | } | |
648 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
501c87a9 | 649 | |
05b41494 | 650 | unlock_out: |
05b41494 | 651 | mutex_unlock(&cdev->lock); |
1da177e4 LT |
652 | } |
653 | ||
654 | /* -------- file_operations for capidev ----------------------------- */ | |
655 | ||
656 | static ssize_t | |
657 | capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
658 | { | |
54cbb1ca | 659 | struct capidev *cdev = file->private_data; |
1da177e4 LT |
660 | struct sk_buff *skb; |
661 | size_t copied; | |
28a1dbb6 | 662 | int err; |
1da177e4 LT |
663 | |
664 | if (!cdev->ap.applid) | |
665 | return -ENODEV; | |
666 | ||
28a1dbb6 JK |
667 | skb = skb_dequeue(&cdev->recvqueue); |
668 | if (!skb) { | |
1da177e4 LT |
669 | if (file->f_flags & O_NONBLOCK) |
670 | return -EAGAIN; | |
28a1dbb6 | 671 | err = wait_event_interruptible(cdev->recvwait, |
475be4d8 | 672 | (skb = skb_dequeue(&cdev->recvqueue))); |
28a1dbb6 JK |
673 | if (err) |
674 | return err; | |
1da177e4 LT |
675 | } |
676 | if (skb->len > count) { | |
677 | skb_queue_head(&cdev->recvqueue, skb); | |
678 | return -EMSGSIZE; | |
679 | } | |
680 | if (copy_to_user(buf, skb->data, skb->len)) { | |
681 | skb_queue_head(&cdev->recvqueue, skb); | |
682 | return -EFAULT; | |
683 | } | |
684 | copied = skb->len; | |
685 | ||
686 | kfree_skb(skb); | |
687 | ||
688 | return copied; | |
689 | } | |
690 | ||
691 | static ssize_t | |
692 | capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
693 | { | |
54cbb1ca | 694 | struct capidev *cdev = file->private_data; |
1da177e4 LT |
695 | struct sk_buff *skb; |
696 | u16 mlen; | |
697 | ||
698 | if (!cdev->ap.applid) | |
699 | return -ENODEV; | |
700 | ||
701 | skb = alloc_skb(count, GFP_USER); | |
702 | if (!skb) | |
703 | return -ENOMEM; | |
704 | ||
705 | if (copy_from_user(skb_put(skb, count), buf, count)) { | |
706 | kfree_skb(skb); | |
707 | return -EFAULT; | |
708 | } | |
709 | mlen = CAPIMSG_LEN(skb->data); | |
710 | if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) { | |
711 | if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) { | |
712 | kfree_skb(skb); | |
713 | return -EINVAL; | |
714 | } | |
715 | } else { | |
716 | if (mlen != count) { | |
717 | kfree_skb(skb); | |
718 | return -EINVAL; | |
719 | } | |
720 | } | |
721 | CAPIMSG_SETAPPID(skb->data, cdev->ap.applid); | |
722 | ||
723 | if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) { | |
05b41494 | 724 | mutex_lock(&cdev->lock); |
1da177e4 | 725 | capincci_free(cdev, CAPIMSG_NCCI(skb->data)); |
05b41494 | 726 | mutex_unlock(&cdev->lock); |
1da177e4 LT |
727 | } |
728 | ||
729 | cdev->errcode = capi20_put_message(&cdev->ap, skb); | |
730 | ||
731 | if (cdev->errcode) { | |
732 | kfree_skb(skb); | |
733 | return -EIO; | |
734 | } | |
735 | return count; | |
736 | } | |
737 | ||
738 | static unsigned int | |
475be4d8 | 739 | capi_poll(struct file *file, poll_table *wait) |
1da177e4 | 740 | { |
54cbb1ca | 741 | struct capidev *cdev = file->private_data; |
1da177e4 LT |
742 | unsigned int mask = 0; |
743 | ||
744 | if (!cdev->ap.applid) | |
745 | return POLLERR; | |
746 | ||
747 | poll_wait(file, &(cdev->recvwait), wait); | |
748 | mask = POLLOUT | POLLWRNORM; | |
749 | if (!skb_queue_empty(&cdev->recvqueue)) | |
750 | mask |= POLLIN | POLLRDNORM; | |
751 | return mask; | |
752 | } | |
753 | ||
754 | static int | |
703c631e | 755 | capi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
756 | { |
757 | struct capidev *cdev = file->private_data; | |
1da177e4 LT |
758 | capi_ioctl_struct data; |
759 | int retval = -EINVAL; | |
760 | void __user *argp = (void __user *)arg; | |
761 | ||
762 | switch (cmd) { | |
763 | case CAPI_REGISTER: | |
05b41494 | 764 | mutex_lock(&cdev->lock); |
1da177e4 | 765 | |
05b41494 JK |
766 | if (cdev->ap.applid) { |
767 | retval = -EEXIST; | |
768 | goto register_out; | |
769 | } | |
770 | if (copy_from_user(&cdev->ap.rparam, argp, | |
771 | sizeof(struct capi_register_params))) { | |
772 | retval = -EFAULT; | |
773 | goto register_out; | |
774 | } | |
775 | cdev->ap.private = cdev; | |
776 | cdev->ap.recv_message = capi_recv_message; | |
777 | cdev->errcode = capi20_register(&cdev->ap); | |
778 | retval = (int)cdev->ap.applid; | |
779 | if (cdev->errcode) { | |
780 | cdev->ap.applid = 0; | |
781 | retval = -EIO; | |
1da177e4 | 782 | } |
05b41494 JK |
783 | |
784 | register_out: | |
785 | mutex_unlock(&cdev->lock); | |
786 | return retval; | |
1da177e4 LT |
787 | |
788 | case CAPI_GET_VERSION: | |
475be4d8 JP |
789 | { |
790 | if (copy_from_user(&data.contr, argp, | |
791 | sizeof(data.contr))) | |
792 | return -EFAULT; | |
793 | cdev->errcode = capi20_get_version(data.contr, &data.version); | |
794 | if (cdev->errcode) | |
795 | return -EIO; | |
796 | if (copy_to_user(argp, &data.version, | |
797 | sizeof(data.version))) | |
798 | return -EFAULT; | |
799 | } | |
800 | return 0; | |
1da177e4 LT |
801 | |
802 | case CAPI_GET_SERIAL: | |
475be4d8 JP |
803 | { |
804 | if (copy_from_user(&data.contr, argp, | |
805 | sizeof(data.contr))) | |
806 | return -EFAULT; | |
807 | cdev->errcode = capi20_get_serial(data.contr, data.serial); | |
808 | if (cdev->errcode) | |
809 | return -EIO; | |
810 | if (copy_to_user(argp, data.serial, | |
811 | sizeof(data.serial))) | |
812 | return -EFAULT; | |
813 | } | |
814 | return 0; | |
1da177e4 | 815 | case CAPI_GET_PROFILE: |
475be4d8 JP |
816 | { |
817 | if (copy_from_user(&data.contr, argp, | |
818 | sizeof(data.contr))) | |
819 | return -EFAULT; | |
1da177e4 | 820 | |
475be4d8 JP |
821 | if (data.contr == 0) { |
822 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); | |
823 | if (cdev->errcode) | |
824 | return -EIO; | |
1da177e4 | 825 | |
475be4d8 JP |
826 | retval = copy_to_user(argp, |
827 | &data.profile.ncontroller, | |
828 | sizeof(data.profile.ncontroller)); | |
1da177e4 | 829 | |
475be4d8 JP |
830 | } else { |
831 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); | |
832 | if (cdev->errcode) | |
833 | return -EIO; | |
1da177e4 | 834 | |
475be4d8 JP |
835 | retval = copy_to_user(argp, &data.profile, |
836 | sizeof(data.profile)); | |
1da177e4 | 837 | } |
475be4d8 JP |
838 | if (retval) |
839 | return -EFAULT; | |
840 | } | |
841 | return 0; | |
1da177e4 LT |
842 | |
843 | case CAPI_GET_MANUFACTURER: | |
475be4d8 JP |
844 | { |
845 | if (copy_from_user(&data.contr, argp, | |
846 | sizeof(data.contr))) | |
847 | return -EFAULT; | |
848 | cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer); | |
849 | if (cdev->errcode) | |
850 | return -EIO; | |
1da177e4 | 851 | |
475be4d8 JP |
852 | if (copy_to_user(argp, data.manufacturer, |
853 | sizeof(data.manufacturer))) | |
854 | return -EFAULT; | |
1da177e4 | 855 | |
475be4d8 JP |
856 | } |
857 | return 0; | |
1da177e4 LT |
858 | case CAPI_GET_ERRCODE: |
859 | data.errcode = cdev->errcode; | |
860 | cdev->errcode = CAPI_NOERROR; | |
861 | if (arg) { | |
862 | if (copy_to_user(argp, &data.errcode, | |
863 | sizeof(data.errcode))) | |
864 | return -EFAULT; | |
865 | } | |
866 | return data.errcode; | |
867 | ||
868 | case CAPI_INSTALLED: | |
869 | if (capi20_isinstalled() == CAPI_NOERROR) | |
870 | return 0; | |
871 | return -ENXIO; | |
872 | ||
873 | case CAPI_MANUFACTURER_CMD: | |
475be4d8 JP |
874 | { |
875 | struct capi_manufacturer_cmd mcmd; | |
876 | if (!capable(CAP_SYS_ADMIN)) | |
877 | return -EPERM; | |
878 | if (copy_from_user(&mcmd, argp, sizeof(mcmd))) | |
879 | return -EFAULT; | |
880 | return capi20_manufacturer(mcmd.cmd, mcmd.data); | |
881 | } | |
882 | return 0; | |
1da177e4 LT |
883 | |
884 | case CAPI_SET_FLAGS: | |
05b41494 JK |
885 | case CAPI_CLR_FLAGS: { |
886 | unsigned userflags; | |
887 | ||
888 | if (copy_from_user(&userflags, argp, sizeof(userflags))) | |
889 | return -EFAULT; | |
1da177e4 | 890 | |
05b41494 JK |
891 | mutex_lock(&cdev->lock); |
892 | if (cmd == CAPI_SET_FLAGS) | |
893 | cdev->userflags |= userflags; | |
894 | else | |
895 | cdev->userflags &= ~userflags; | |
896 | mutex_unlock(&cdev->lock); | |
897 | return 0; | |
898 | } | |
1da177e4 LT |
899 | case CAPI_GET_FLAGS: |
900 | if (copy_to_user(argp, &cdev->userflags, | |
901 | sizeof(cdev->userflags))) | |
902 | return -EFAULT; | |
903 | return 0; | |
904 | ||
05b41494 JK |
905 | case CAPI_NCCI_OPENCOUNT: { |
906 | struct capincci *nccip; | |
907 | unsigned ncci; | |
908 | int count = 0; | |
1da177e4 | 909 | |
05b41494 JK |
910 | if (copy_from_user(&ncci, argp, sizeof(ncci))) |
911 | return -EFAULT; | |
912 | ||
913 | mutex_lock(&cdev->lock); | |
914 | nccip = capincci_find(cdev, (u32)ncci); | |
915 | if (nccip) | |
916 | count = capincci_minor_opencount(nccip); | |
917 | mutex_unlock(&cdev->lock); | |
918 | return count; | |
919 | } | |
1da177e4 LT |
920 | |
921 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
05b41494 JK |
922 | case CAPI_NCCI_GETUNIT: { |
923 | struct capincci *nccip; | |
924 | struct capiminor *mp; | |
925 | unsigned ncci; | |
926 | int unit = -ESRCH; | |
927 | ||
928 | if (copy_from_user(&ncci, argp, sizeof(ncci))) | |
929 | return -EFAULT; | |
930 | ||
931 | mutex_lock(&cdev->lock); | |
932 | nccip = capincci_find(cdev, (u32)ncci); | |
933 | if (nccip) { | |
934 | mp = nccip->minorp; | |
935 | if (mp) | |
936 | unit = mp->minor; | |
1da177e4 | 937 | } |
05b41494 JK |
938 | mutex_unlock(&cdev->lock); |
939 | return unit; | |
940 | } | |
1da177e4 | 941 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
05b41494 JK |
942 | |
943 | default: | |
944 | return -EINVAL; | |
1da177e4 | 945 | } |
1da177e4 LT |
946 | } |
947 | ||
703c631e AB |
948 | static long |
949 | capi_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
950 | { | |
951 | int ret; | |
952 | ||
76a64921 | 953 | mutex_lock(&capi_mutex); |
703c631e | 954 | ret = capi_ioctl(file, cmd, arg); |
76a64921 | 955 | mutex_unlock(&capi_mutex); |
703c631e AB |
956 | |
957 | return ret; | |
958 | } | |
959 | ||
eca39dd8 | 960 | static int capi_open(struct inode *inode, struct file *file) |
1da177e4 | 961 | { |
eca39dd8 JK |
962 | struct capidev *cdev; |
963 | ||
964 | cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); | |
965 | if (!cdev) | |
966 | return -ENOMEM; | |
967 | ||
05b41494 | 968 | mutex_init(&cdev->lock); |
eca39dd8 JK |
969 | skb_queue_head_init(&cdev->recvqueue); |
970 | init_waitqueue_head(&cdev->recvwait); | |
884f5c44 | 971 | INIT_LIST_HEAD(&cdev->nccis); |
eca39dd8 JK |
972 | file->private_data = cdev; |
973 | ||
974 | mutex_lock(&capidev_list_lock); | |
975 | list_add_tail(&cdev->list, &capidev_list); | |
976 | mutex_unlock(&capidev_list_lock); | |
977 | ||
978 | return nonseekable_open(inode, file); | |
1da177e4 LT |
979 | } |
980 | ||
eca39dd8 | 981 | static int capi_release(struct inode *inode, struct file *file) |
1da177e4 | 982 | { |
eca39dd8 | 983 | struct capidev *cdev = file->private_data; |
1da177e4 | 984 | |
eca39dd8 JK |
985 | mutex_lock(&capidev_list_lock); |
986 | list_del(&cdev->list); | |
987 | mutex_unlock(&capidev_list_lock); | |
988 | ||
05b41494 | 989 | if (cdev->ap.applid) |
eca39dd8 | 990 | capi20_release(&cdev->ap); |
eca39dd8 | 991 | skb_queue_purge(&cdev->recvqueue); |
eca39dd8 | 992 | capincci_free(cdev, 0xffffffff); |
eca39dd8 JK |
993 | |
994 | kfree(cdev); | |
1da177e4 LT |
995 | return 0; |
996 | } | |
997 | ||
2b8693c0 | 998 | static const struct file_operations capi_fops = |
1da177e4 LT |
999 | { |
1000 | .owner = THIS_MODULE, | |
1001 | .llseek = no_llseek, | |
1002 | .read = capi_read, | |
1003 | .write = capi_write, | |
1004 | .poll = capi_poll, | |
703c631e | 1005 | .unlocked_ioctl = capi_unlocked_ioctl, |
1da177e4 LT |
1006 | .open = capi_open, |
1007 | .release = capi_release, | |
1008 | }; | |
1009 | ||
1010 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
1011 | /* -------- tty_operations for capincci ----------------------------- */ | |
1012 | ||
46324511 JK |
1013 | static int |
1014 | capinc_tty_install(struct tty_driver *driver, struct tty_struct *tty) | |
1da177e4 | 1015 | { |
410235fd | 1016 | struct capiminor *mp = capiminor_get(tty->index); |
81f5835e | 1017 | int ret = tty_standard_install(driver, tty); |
46324511 | 1018 | |
81f5835e | 1019 | if (ret == 0) |
46324511 | 1020 | tty->driver_data = mp; |
81f5835e | 1021 | else |
46324511 JK |
1022 | capiminor_put(mp); |
1023 | return ret; | |
1024 | } | |
1da177e4 | 1025 | |
46324511 JK |
1026 | static void capinc_tty_cleanup(struct tty_struct *tty) |
1027 | { | |
1028 | struct capiminor *mp = tty->driver_data; | |
1029 | tty->driver_data = NULL; | |
1030 | capiminor_put(mp); | |
1031 | } | |
1da177e4 | 1032 | |
fb4b4881 | 1033 | static int capinc_tty_open(struct tty_struct *tty, struct file *filp) |
46324511 JK |
1034 | { |
1035 | struct capiminor *mp = tty->driver_data; | |
fb4b4881 JK |
1036 | int err; |
1037 | ||
1038 | err = tty_port_open(&mp->port, tty, filp); | |
1039 | if (err) | |
1040 | return err; | |
1da177e4 | 1041 | |
1da177e4 LT |
1042 | handle_minor_recv(mp); |
1043 | return 0; | |
1044 | } | |
1045 | ||
fb4b4881 | 1046 | static void capinc_tty_close(struct tty_struct *tty, struct file *filp) |
1da177e4 | 1047 | { |
46324511 | 1048 | struct capiminor *mp = tty->driver_data; |
1da177e4 | 1049 | |
fb4b4881 | 1050 | tty_port_close(&mp->port, tty, filp); |
1da177e4 LT |
1051 | } |
1052 | ||
6576c289 | 1053 | static int capinc_tty_write(struct tty_struct *tty, |
1da177e4 LT |
1054 | const unsigned char *buf, int count) |
1055 | { | |
2c8df722 | 1056 | struct capiminor *mp = tty->driver_data; |
1da177e4 LT |
1057 | struct sk_buff *skb; |
1058 | ||
8fb53b95 | 1059 | pr_debug("capinc_tty_write(count=%d)\n", count); |
1da177e4 | 1060 | |
dfbb84ff JK |
1061 | spin_lock_bh(&mp->outlock); |
1062 | skb = mp->outskb; | |
1da177e4 | 1063 | if (skb) { |
dfbb84ff JK |
1064 | mp->outskb = NULL; |
1065 | __skb_queue_tail(&mp->outqueue, skb); | |
1da177e4 LT |
1066 | mp->outbytes += skb->len; |
1067 | } | |
1068 | ||
475be4d8 | 1069 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN + count, GFP_ATOMIC); |
1da177e4 LT |
1070 | if (!skb) { |
1071 | printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n"); | |
dfbb84ff | 1072 | spin_unlock_bh(&mp->outlock); |
1da177e4 LT |
1073 | return -ENOMEM; |
1074 | } | |
1075 | ||
1076 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); | |
1077 | memcpy(skb_put(skb, count), buf, count); | |
1078 | ||
dfbb84ff | 1079 | __skb_queue_tail(&mp->outqueue, skb); |
1da177e4 | 1080 | mp->outbytes += skb->len; |
dfbb84ff JK |
1081 | spin_unlock_bh(&mp->outlock); |
1082 | ||
eef0ced0 | 1083 | handle_minor_send(mp); |
dfbb84ff | 1084 | |
1da177e4 LT |
1085 | return count; |
1086 | } | |
1087 | ||
f2545a75 | 1088 | static int capinc_tty_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 1089 | { |
2c8df722 | 1090 | struct capiminor *mp = tty->driver_data; |
dfbb84ff | 1091 | bool invoke_send = false; |
1da177e4 | 1092 | struct sk_buff *skb; |
f2545a75 | 1093 | int ret = 1; |
1da177e4 | 1094 | |
8fb53b95 | 1095 | pr_debug("capinc_put_char(%u)\n", ch); |
1da177e4 | 1096 | |
dfbb84ff JK |
1097 | spin_lock_bh(&mp->outlock); |
1098 | skb = mp->outskb; | |
1da177e4 LT |
1099 | if (skb) { |
1100 | if (skb_tailroom(skb) > 0) { | |
1101 | *(skb_put(skb, 1)) = ch; | |
dfbb84ff | 1102 | goto unlock_out; |
1da177e4 | 1103 | } |
dfbb84ff JK |
1104 | mp->outskb = NULL; |
1105 | __skb_queue_tail(&mp->outqueue, skb); | |
1da177e4 | 1106 | mp->outbytes += skb->len; |
dfbb84ff | 1107 | invoke_send = true; |
1da177e4 | 1108 | } |
dfbb84ff | 1109 | |
475be4d8 | 1110 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN + CAPI_MAX_BLKSIZE, GFP_ATOMIC); |
1da177e4 LT |
1111 | if (skb) { |
1112 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); | |
1113 | *(skb_put(skb, 1)) = ch; | |
dfbb84ff | 1114 | mp->outskb = skb; |
1da177e4 LT |
1115 | } else { |
1116 | printk(KERN_ERR "capinc_put_char: char %u lost\n", ch); | |
f2545a75 | 1117 | ret = 0; |
1da177e4 | 1118 | } |
dfbb84ff JK |
1119 | |
1120 | unlock_out: | |
1121 | spin_unlock_bh(&mp->outlock); | |
1122 | ||
1123 | if (invoke_send) | |
eef0ced0 | 1124 | handle_minor_send(mp); |
dfbb84ff | 1125 | |
f2545a75 | 1126 | return ret; |
1da177e4 LT |
1127 | } |
1128 | ||
1129 | static void capinc_tty_flush_chars(struct tty_struct *tty) | |
1130 | { | |
2c8df722 | 1131 | struct capiminor *mp = tty->driver_data; |
1da177e4 LT |
1132 | struct sk_buff *skb; |
1133 | ||
8fb53b95 | 1134 | pr_debug("capinc_tty_flush_chars\n"); |
1da177e4 | 1135 | |
dfbb84ff JK |
1136 | spin_lock_bh(&mp->outlock); |
1137 | skb = mp->outskb; | |
1da177e4 | 1138 | if (skb) { |
dfbb84ff JK |
1139 | mp->outskb = NULL; |
1140 | __skb_queue_tail(&mp->outqueue, skb); | |
1da177e4 | 1141 | mp->outbytes += skb->len; |
dfbb84ff JK |
1142 | spin_unlock_bh(&mp->outlock); |
1143 | ||
eef0ced0 | 1144 | handle_minor_send(mp); |
dfbb84ff JK |
1145 | } else |
1146 | spin_unlock_bh(&mp->outlock); | |
1147 | ||
1148 | handle_minor_recv(mp); | |
1da177e4 LT |
1149 | } |
1150 | ||
1151 | static int capinc_tty_write_room(struct tty_struct *tty) | |
1152 | { | |
2c8df722 | 1153 | struct capiminor *mp = tty->driver_data; |
1da177e4 | 1154 | int room; |
2c8df722 | 1155 | |
1da177e4 LT |
1156 | room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue); |
1157 | room *= CAPI_MAX_BLKSIZE; | |
8fb53b95 | 1158 | pr_debug("capinc_tty_write_room = %d\n", room); |
1da177e4 LT |
1159 | return room; |
1160 | } | |
1161 | ||
408b664a | 1162 | static int capinc_tty_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1163 | { |
2c8df722 JK |
1164 | struct capiminor *mp = tty->driver_data; |
1165 | ||
8fb53b95 DM |
1166 | pr_debug("capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n", |
1167 | mp->outbytes, mp->nack, | |
1168 | skb_queue_len(&mp->outqueue), | |
1169 | skb_queue_len(&mp->inqueue)); | |
1da177e4 LT |
1170 | return mp->outbytes; |
1171 | } | |
1172 | ||
6caa76b7 | 1173 | static int capinc_tty_ioctl(struct tty_struct *tty, |
475be4d8 | 1174 | unsigned int cmd, unsigned long arg) |
1da177e4 | 1175 | { |
6caa76b7 | 1176 | return -ENOIOCTLCMD; |
1da177e4 LT |
1177 | } |
1178 | ||
475be4d8 | 1179 | static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios *old) |
1da177e4 | 1180 | { |
8fb53b95 | 1181 | pr_debug("capinc_tty_set_termios\n"); |
1da177e4 LT |
1182 | } |
1183 | ||
2c8df722 | 1184 | static void capinc_tty_throttle(struct tty_struct *tty) |
1da177e4 | 1185 | { |
2c8df722 | 1186 | struct capiminor *mp = tty->driver_data; |
8fb53b95 | 1187 | pr_debug("capinc_tty_throttle\n"); |
2c8df722 | 1188 | mp->ttyinstop = 1; |
1da177e4 LT |
1189 | } |
1190 | ||
2c8df722 | 1191 | static void capinc_tty_unthrottle(struct tty_struct *tty) |
1da177e4 | 1192 | { |
2c8df722 | 1193 | struct capiminor *mp = tty->driver_data; |
2c8df722 | 1194 | |
8fb53b95 | 1195 | pr_debug("capinc_tty_unthrottle\n"); |
2c8df722 JK |
1196 | mp->ttyinstop = 0; |
1197 | handle_minor_recv(mp); | |
1da177e4 LT |
1198 | } |
1199 | ||
1200 | static void capinc_tty_stop(struct tty_struct *tty) | |
1201 | { | |
2c8df722 JK |
1202 | struct capiminor *mp = tty->driver_data; |
1203 | ||
8fb53b95 | 1204 | pr_debug("capinc_tty_stop\n"); |
2c8df722 | 1205 | mp->ttyoutstop = 1; |
1da177e4 LT |
1206 | } |
1207 | ||
1208 | static void capinc_tty_start(struct tty_struct *tty) | |
1209 | { | |
2c8df722 | 1210 | struct capiminor *mp = tty->driver_data; |
2c8df722 | 1211 | |
8fb53b95 | 1212 | pr_debug("capinc_tty_start\n"); |
2c8df722 | 1213 | mp->ttyoutstop = 0; |
eef0ced0 | 1214 | handle_minor_send(mp); |
1da177e4 LT |
1215 | } |
1216 | ||
1217 | static void capinc_tty_hangup(struct tty_struct *tty) | |
1218 | { | |
fb4b4881 JK |
1219 | struct capiminor *mp = tty->driver_data; |
1220 | ||
8fb53b95 | 1221 | pr_debug("capinc_tty_hangup\n"); |
fb4b4881 | 1222 | tty_port_hangup(&mp->port); |
1da177e4 LT |
1223 | } |
1224 | ||
9e98966c | 1225 | static int capinc_tty_break_ctl(struct tty_struct *tty, int state) |
1da177e4 | 1226 | { |
8fb53b95 | 1227 | pr_debug("capinc_tty_break_ctl(%d)\n", state); |
9e98966c | 1228 | return 0; |
1da177e4 LT |
1229 | } |
1230 | ||
1231 | static void capinc_tty_flush_buffer(struct tty_struct *tty) | |
1232 | { | |
8fb53b95 | 1233 | pr_debug("capinc_tty_flush_buffer\n"); |
1da177e4 LT |
1234 | } |
1235 | ||
1236 | static void capinc_tty_set_ldisc(struct tty_struct *tty) | |
1237 | { | |
8fb53b95 | 1238 | pr_debug("capinc_tty_set_ldisc\n"); |
1da177e4 LT |
1239 | } |
1240 | ||
1241 | static void capinc_tty_send_xchar(struct tty_struct *tty, char ch) | |
1242 | { | |
8fb53b95 | 1243 | pr_debug("capinc_tty_send_xchar(%d)\n", ch); |
1da177e4 LT |
1244 | } |
1245 | ||
b68e31d0 | 1246 | static const struct tty_operations capinc_ops = { |
1da177e4 LT |
1247 | .open = capinc_tty_open, |
1248 | .close = capinc_tty_close, | |
1249 | .write = capinc_tty_write, | |
1250 | .put_char = capinc_tty_put_char, | |
1251 | .flush_chars = capinc_tty_flush_chars, | |
1252 | .write_room = capinc_tty_write_room, | |
1253 | .chars_in_buffer = capinc_tty_chars_in_buffer, | |
1254 | .ioctl = capinc_tty_ioctl, | |
1255 | .set_termios = capinc_tty_set_termios, | |
1256 | .throttle = capinc_tty_throttle, | |
1257 | .unthrottle = capinc_tty_unthrottle, | |
1258 | .stop = capinc_tty_stop, | |
1259 | .start = capinc_tty_start, | |
1260 | .hangup = capinc_tty_hangup, | |
1261 | .break_ctl = capinc_tty_break_ctl, | |
1262 | .flush_buffer = capinc_tty_flush_buffer, | |
1263 | .set_ldisc = capinc_tty_set_ldisc, | |
1264 | .send_xchar = capinc_tty_send_xchar, | |
46324511 JK |
1265 | .install = capinc_tty_install, |
1266 | .cleanup = capinc_tty_cleanup, | |
1da177e4 LT |
1267 | }; |
1268 | ||
e76b1544 | 1269 | static int __init capinc_tty_init(void) |
1da177e4 LT |
1270 | { |
1271 | struct tty_driver *drv; | |
e76b1544 JK |
1272 | int err; |
1273 | ||
1da177e4 LT |
1274 | if (capi_ttyminors > CAPINC_MAX_PORTS) |
1275 | capi_ttyminors = CAPINC_MAX_PORTS; | |
1276 | if (capi_ttyminors <= 0) | |
1277 | capi_ttyminors = CAPINC_NR_PORTS; | |
1278 | ||
81d17fe5 JK |
1279 | capiminors = kzalloc(sizeof(struct capi_minor *) * capi_ttyminors, |
1280 | GFP_KERNEL); | |
1281 | if (!capiminors) | |
1da177e4 LT |
1282 | return -ENOMEM; |
1283 | ||
81d17fe5 JK |
1284 | drv = alloc_tty_driver(capi_ttyminors); |
1285 | if (!drv) { | |
1286 | kfree(capiminors); | |
1287 | return -ENOMEM; | |
1288 | } | |
1da177e4 | 1289 | drv->driver_name = "capi_nc"; |
1da177e4 | 1290 | drv->name = "capi"; |
e95ac143 | 1291 | drv->major = 0; |
1da177e4 LT |
1292 | drv->minor_start = 0; |
1293 | drv->type = TTY_DRIVER_TYPE_SERIAL; | |
1294 | drv->subtype = SERIAL_TYPE_NORMAL; | |
1295 | drv->init_termios = tty_std_termios; | |
1296 | drv->init_termios.c_iflag = ICRNL; | |
1297 | drv->init_termios.c_oflag = OPOST | ONLCR; | |
1298 | drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
1299 | drv->init_termios.c_lflag = 0; | |
40fb2d0d JK |
1300 | drv->flags = |
1301 | TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS | | |
1302 | TTY_DRIVER_DYNAMIC_DEV; | |
1da177e4 | 1303 | tty_set_operations(drv, &capinc_ops); |
e76b1544 JK |
1304 | |
1305 | err = tty_register_driver(drv); | |
1306 | if (err) { | |
1da177e4 | 1307 | put_tty_driver(drv); |
81d17fe5 | 1308 | kfree(capiminors); |
1da177e4 | 1309 | printk(KERN_ERR "Couldn't register capi_nc driver\n"); |
e76b1544 | 1310 | return err; |
1da177e4 LT |
1311 | } |
1312 | capinc_tty_driver = drv; | |
1313 | return 0; | |
1314 | } | |
1315 | ||
e76b1544 | 1316 | static void __exit capinc_tty_exit(void) |
1da177e4 | 1317 | { |
e76b1544 JK |
1318 | tty_unregister_driver(capinc_tty_driver); |
1319 | put_tty_driver(capinc_tty_driver); | |
81d17fe5 | 1320 | kfree(capiminors); |
1da177e4 LT |
1321 | } |
1322 | ||
501c87a9 JK |
1323 | #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
1324 | ||
1325 | static inline int capinc_tty_init(void) | |
1326 | { | |
1327 | return 0; | |
1328 | } | |
1329 | ||
1330 | static inline void capinc_tty_exit(void) { } | |
1331 | ||
1332 | #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
1da177e4 LT |
1333 | |
1334 | /* -------- /proc functions ----------------------------------------- */ | |
1335 | ||
1336 | /* | |
1337 | * /proc/capi/capi20: | |
1338 | * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt | |
1339 | */ | |
9a58a80a | 1340 | static int capi20_proc_show(struct seq_file *m, void *v) |
1da177e4 | 1341 | { |
475be4d8 | 1342 | struct capidev *cdev; |
1da177e4 | 1343 | struct list_head *l; |
1da177e4 | 1344 | |
b8f433dc | 1345 | mutex_lock(&capidev_list_lock); |
1da177e4 LT |
1346 | list_for_each(l, &capidev_list) { |
1347 | cdev = list_entry(l, struct capidev, list); | |
9a58a80a | 1348 | seq_printf(m, "0 %d %lu %lu %lu %lu\n", |
475be4d8 JP |
1349 | cdev->ap.applid, |
1350 | cdev->ap.nrecvctlpkt, | |
1351 | cdev->ap.nrecvdatapkt, | |
1352 | cdev->ap.nsentctlpkt, | |
1353 | cdev->ap.nsentdatapkt); | |
1da177e4 | 1354 | } |
b8f433dc | 1355 | mutex_unlock(&capidev_list_lock); |
9a58a80a | 1356 | return 0; |
1da177e4 LT |
1357 | } |
1358 | ||
9a58a80a AD |
1359 | static int capi20_proc_open(struct inode *inode, struct file *file) |
1360 | { | |
1361 | return single_open(file, capi20_proc_show, NULL); | |
1362 | } | |
1363 | ||
1364 | static const struct file_operations capi20_proc_fops = { | |
1365 | .owner = THIS_MODULE, | |
1366 | .open = capi20_proc_open, | |
1367 | .read = seq_read, | |
1368 | .llseek = seq_lseek, | |
1369 | .release = single_release, | |
1370 | }; | |
1371 | ||
1da177e4 LT |
1372 | /* |
1373 | * /proc/capi/capi20ncci: | |
1374 | * applid ncci | |
1375 | */ | |
9a58a80a | 1376 | static int capi20ncci_proc_show(struct seq_file *m, void *v) |
1da177e4 | 1377 | { |
884f5c44 JK |
1378 | struct capidev *cdev; |
1379 | struct capincci *np; | |
1da177e4 | 1380 | |
b8f433dc | 1381 | mutex_lock(&capidev_list_lock); |
884f5c44 | 1382 | list_for_each_entry(cdev, &capidev_list, list) { |
05b41494 | 1383 | mutex_lock(&cdev->lock); |
884f5c44 JK |
1384 | list_for_each_entry(np, &cdev->nccis, list) |
1385 | seq_printf(m, "%d 0x%x\n", cdev->ap.applid, np->ncci); | |
05b41494 | 1386 | mutex_unlock(&cdev->lock); |
1da177e4 | 1387 | } |
b8f433dc | 1388 | mutex_unlock(&capidev_list_lock); |
9a58a80a | 1389 | return 0; |
1da177e4 LT |
1390 | } |
1391 | ||
9a58a80a AD |
1392 | static int capi20ncci_proc_open(struct inode *inode, struct file *file) |
1393 | { | |
1394 | return single_open(file, capi20ncci_proc_show, NULL); | |
1395 | } | |
1396 | ||
1397 | static const struct file_operations capi20ncci_proc_fops = { | |
1398 | .owner = THIS_MODULE, | |
1399 | .open = capi20ncci_proc_open, | |
1400 | .read = seq_read, | |
1401 | .llseek = seq_lseek, | |
1402 | .release = single_release, | |
1da177e4 LT |
1403 | }; |
1404 | ||
1405 | static void __init proc_init(void) | |
1406 | { | |
9a58a80a AD |
1407 | proc_create("capi/capi20", 0, NULL, &capi20_proc_fops); |
1408 | proc_create("capi/capi20ncci", 0, NULL, &capi20ncci_proc_fops); | |
1da177e4 LT |
1409 | } |
1410 | ||
1411 | static void __exit proc_exit(void) | |
1412 | { | |
9a58a80a AD |
1413 | remove_proc_entry("capi/capi20", NULL); |
1414 | remove_proc_entry("capi/capi20ncci", NULL); | |
1da177e4 LT |
1415 | } |
1416 | ||
1417 | /* -------- init function and module interface ---------------------- */ | |
1418 | ||
1419 | ||
1da177e4 LT |
1420 | static int __init capi_init(void) |
1421 | { | |
88549d6b | 1422 | const char *compileinfo; |
6d9eac34 | 1423 | int major_ret; |
1da177e4 | 1424 | |
6d9eac34 AM |
1425 | major_ret = register_chrdev(capi_major, "capi20", &capi_fops); |
1426 | if (major_ret < 0) { | |
1da177e4 | 1427 | printk(KERN_ERR "capi20: unable to get major %d\n", capi_major); |
6d9eac34 | 1428 | return major_ret; |
1da177e4 | 1429 | } |
56b22935 | 1430 | capi_class = class_create(THIS_MODULE, "capi"); |
1da177e4 LT |
1431 | if (IS_ERR(capi_class)) { |
1432 | unregister_chrdev(capi_major, "capi20"); | |
1433 | return PTR_ERR(capi_class); | |
1434 | } | |
1435 | ||
a9b12619 | 1436 | device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi"); |
1da177e4 | 1437 | |
1da177e4 | 1438 | if (capinc_tty_init() < 0) { |
d78b0368 | 1439 | device_destroy(capi_class, MKDEV(capi_major, 0)); |
56b22935 | 1440 | class_destroy(capi_class); |
1da177e4 LT |
1441 | unregister_chrdev(capi_major, "capi20"); |
1442 | return -ENOMEM; | |
1443 | } | |
1da177e4 LT |
1444 | |
1445 | proc_init(); | |
1446 | ||
1f90d665 | 1447 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
475be4d8 | 1448 | compileinfo = " (middleware)"; |
1da177e4 | 1449 | #else |
475be4d8 | 1450 | compileinfo = " (no middleware)"; |
1da177e4 | 1451 | #endif |
88549d6b JK |
1452 | printk(KERN_NOTICE "CAPI 2.0 started up with major %d%s\n", |
1453 | capi_major, compileinfo); | |
1da177e4 LT |
1454 | |
1455 | return 0; | |
1456 | } | |
1457 | ||
1458 | static void __exit capi_exit(void) | |
1459 | { | |
1460 | proc_exit(); | |
1461 | ||
d78b0368 | 1462 | device_destroy(capi_class, MKDEV(capi_major, 0)); |
56b22935 | 1463 | class_destroy(capi_class); |
1da177e4 | 1464 | unregister_chrdev(capi_major, "capi20"); |
1da177e4 | 1465 | |
1da177e4 | 1466 | capinc_tty_exit(); |
1da177e4 LT |
1467 | } |
1468 | ||
1469 | module_init(capi_init); | |
1470 | module_exit(capi_exit); |