Commit | Line | Data |
---|---|---|
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 | ||
20fbdc35 | 12 | #include <linux/compiler.h> |
1da177e4 | 13 | #include <linux/module.h> |
cc69837f | 14 | #include <linux/ethtool.h> |
1da177e4 LT |
15 | #include <linux/errno.h> |
16 | #include <linux/kernel.h> | |
17 | #include <linux/major.h> | |
18 | #include <linux/sched.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/fcntl.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/signal.h> | |
9ea6e5d8 | 23 | #include <linux/mutex.h> |
1da177e4 | 24 | #include <linux/mm.h> |
1da177e4 LT |
25 | #include <linux/timer.h> |
26 | #include <linux/wait.h> | |
1da177e4 | 27 | #include <linux/tty.h> |
1da177e4 LT |
28 | #include <linux/netdevice.h> |
29 | #include <linux/ppp_defs.h> | |
4b32da2b | 30 | #include <linux/ppp-ioctl.h> |
1da177e4 LT |
31 | #include <linux/skbuff.h> |
32 | #include <linux/proc_fs.h> | |
9a58a80a | 33 | #include <linux/seq_file.h> |
1da177e4 LT |
34 | #include <linux/poll.h> |
35 | #include <linux/capi.h> | |
36 | #include <linux/kernelcapi.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/device.h> | |
39 | #include <linux/moduleparam.h> | |
1da177e4 LT |
40 | #include <linux/isdn/capiutil.h> |
41 | #include <linux/isdn/capicmd.h> | |
90926f0e | 42 | |
f59aba2f AB |
43 | #include "kcapi.h" |
44 | ||
45 | MODULE_DESCRIPTION("CAPI4Linux: kernel CAPI layer and /dev/capi20 interface"); | |
1da177e4 LT |
46 | MODULE_AUTHOR("Carsten Paeth"); |
47 | MODULE_LICENSE("GPL"); | |
48 | ||
1da177e4 LT |
49 | /* -------- driver information -------------------------------------- */ |
50 | ||
76a64921 | 51 | static DEFINE_MUTEX(capi_mutex); |
56b22935 | 52 | static struct class *capi_class; |
408b664a | 53 | static int capi_major = 68; /* allocated */ |
501c87a9 JK |
54 | |
55 | module_param_named(major, capi_major, uint, 0); | |
56 | ||
1da177e4 | 57 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
501c87a9 | 58 | #define CAPINC_NR_PORTS 32 |
1da177e4 | 59 | #define CAPINC_MAX_PORTS 256 |
501c87a9 | 60 | |
408b664a | 61 | static int capi_ttyminors = CAPINC_NR_PORTS; |
1da177e4 | 62 | |
1da177e4 LT |
63 | module_param_named(ttyminors, capi_ttyminors, uint, 0); |
64 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
65 | ||
66 | /* -------- defines ------------------------------------------------- */ | |
67 | ||
68 | #define CAPINC_MAX_RECVQUEUE 10 | |
69 | #define CAPINC_MAX_SENDQUEUE 10 | |
70 | #define CAPI_MAX_BLKSIZE 2048 | |
71 | ||
72 | /* -------- data structures ----------------------------------------- */ | |
73 | ||
74 | struct capidev; | |
75 | struct capincci; | |
1da177e4 LT |
76 | struct capiminor; |
77 | ||
42651b5c | 78 | struct ackqueue_entry { |
6aa65472 MB |
79 | struct list_head list; |
80 | u16 datahandle; | |
81 | }; | |
82 | ||
1da177e4 | 83 | struct capiminor { |
1da177e4 LT |
84 | unsigned int minor; |
85 | ||
42792713 JK |
86 | struct capi20_appl *ap; |
87 | u32 ncci; | |
88 | atomic_t datahandle; | |
89 | atomic_t msgid; | |
1da177e4 | 90 | |
fb4b4881 | 91 | struct tty_port port; |
1da177e4 LT |
92 | int ttyinstop; |
93 | int ttyoutstop; | |
1da177e4 | 94 | |
dfbb84ff JK |
95 | struct sk_buff_head inqueue; |
96 | ||
97 | struct sk_buff_head outqueue; | |
98 | int outbytes; | |
99 | struct sk_buff *outskb; | |
100 | spinlock_t outlock; | |
1da177e4 LT |
101 | |
102 | /* transmit path */ | |
6aa65472 | 103 | struct list_head ackqueue; |
1da177e4 | 104 | int nack; |
6aa65472 | 105 | spinlock_t ackqlock; |
1da177e4 | 106 | }; |
1da177e4 LT |
107 | |
108 | struct capincci { | |
884f5c44 | 109 | struct list_head list; |
1da177e4 LT |
110 | u32 ncci; |
111 | struct capidev *cdev; | |
112 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
113 | struct capiminor *minorp; | |
114 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
115 | }; | |
116 | ||
117 | struct capidev { | |
118 | struct list_head list; | |
119 | struct capi20_appl ap; | |
120 | u16 errcode; | |
121 | unsigned userflags; | |
122 | ||
123 | struct sk_buff_head recvqueue; | |
124 | wait_queue_head_t recvwait; | |
125 | ||
884f5c44 | 126 | struct list_head nccis; |
1da177e4 | 127 | |
05b41494 | 128 | struct mutex lock; |
1da177e4 LT |
129 | }; |
130 | ||
131 | /* -------- global variables ---------------------------------------- */ | |
132 | ||
b8f433dc | 133 | static DEFINE_MUTEX(capidev_list_lock); |
1da177e4 LT |
134 | static LIST_HEAD(capidev_list); |
135 | ||
136 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
501c87a9 | 137 | |
3d5d30fe | 138 | static DEFINE_SPINLOCK(capiminors_lock); |
81d17fe5 | 139 | static struct capiminor **capiminors; |
1da177e4 | 140 | |
40fb2d0d JK |
141 | static struct tty_driver *capinc_tty_driver; |
142 | ||
1da177e4 LT |
143 | /* -------- datahandles --------------------------------------------- */ |
144 | ||
501c87a9 | 145 | static int capiminor_add_ack(struct capiminor *mp, u16 datahandle) |
1da177e4 | 146 | { |
42651b5c | 147 | struct ackqueue_entry *n; |
1da177e4 LT |
148 | |
149 | n = kmalloc(sizeof(*n), GFP_ATOMIC); | |
6aa65472 MB |
150 | if (unlikely(!n)) { |
151 | printk(KERN_ERR "capi: alloc datahandle failed\n"); | |
152 | return -1; | |
1da177e4 | 153 | } |
1da177e4 | 154 | n->datahandle = datahandle; |
6aa65472 | 155 | INIT_LIST_HEAD(&n->list); |
2b72b5bd | 156 | spin_lock_bh(&mp->ackqlock); |
6aa65472 | 157 | list_add_tail(&n->list, &mp->ackqueue); |
1da177e4 | 158 | mp->nack++; |
2b72b5bd | 159 | spin_unlock_bh(&mp->ackqlock); |
1da177e4 LT |
160 | return 0; |
161 | } | |
162 | ||
163 | static int capiminor_del_ack(struct capiminor *mp, u16 datahandle) | |
164 | { | |
42651b5c | 165 | struct ackqueue_entry *p, *tmp; |
1da177e4 | 166 | |
2b72b5bd | 167 | spin_lock_bh(&mp->ackqlock); |
6aa65472 | 168 | list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { |
475be4d8 | 169 | if (p->datahandle == datahandle) { |
6aa65472 | 170 | list_del(&p->list); |
1da177e4 | 171 | mp->nack--; |
2b72b5bd JK |
172 | spin_unlock_bh(&mp->ackqlock); |
173 | kfree(p); | |
1da177e4 LT |
174 | return 0; |
175 | } | |
176 | } | |
2b72b5bd | 177 | spin_unlock_bh(&mp->ackqlock); |
1da177e4 LT |
178 | return -1; |
179 | } | |
180 | ||
181 | static void capiminor_del_all_ack(struct capiminor *mp) | |
182 | { | |
42651b5c | 183 | struct ackqueue_entry *p, *tmp; |
1da177e4 | 184 | |
6aa65472 MB |
185 | list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { |
186 | list_del(&p->list); | |
1da177e4 LT |
187 | kfree(p); |
188 | mp->nack--; | |
189 | } | |
190 | } | |
191 | ||
192 | ||
193 | /* -------- struct capiminor ---------------------------------------- */ | |
194 | ||
55bef83c JS |
195 | static void capiminor_destroy(struct tty_port *port) |
196 | { | |
197 | struct capiminor *mp = container_of(port, struct capiminor, port); | |
198 | ||
199 | kfree_skb(mp->outskb); | |
200 | skb_queue_purge(&mp->inqueue); | |
201 | skb_queue_purge(&mp->outqueue); | |
202 | capiminor_del_all_ack(mp); | |
203 | kfree(mp); | |
204 | } | |
205 | ||
206 | static const struct tty_port_operations capiminor_port_ops = { | |
207 | .destruct = capiminor_destroy, | |
208 | }; | |
fb4b4881 | 209 | |
1da177e4 LT |
210 | static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci) |
211 | { | |
81d17fe5 | 212 | struct capiminor *mp; |
40fb2d0d | 213 | struct device *dev; |
81d17fe5 | 214 | unsigned int minor; |
1da177e4 | 215 | |
54f0fad3 | 216 | mp = kzalloc(sizeof(*mp), GFP_KERNEL); |
475be4d8 JP |
217 | if (!mp) { |
218 | printk(KERN_ERR "capi: can't alloc capiminor\n"); | |
1da177e4 LT |
219 | return NULL; |
220 | } | |
221 | ||
1da177e4 LT |
222 | mp->ap = ap; |
223 | mp->ncci = ncci; | |
6aa65472 MB |
224 | INIT_LIST_HEAD(&mp->ackqueue); |
225 | spin_lock_init(&mp->ackqlock); | |
1da177e4 LT |
226 | |
227 | skb_queue_head_init(&mp->inqueue); | |
228 | skb_queue_head_init(&mp->outqueue); | |
dfbb84ff | 229 | spin_lock_init(&mp->outlock); |
1da177e4 | 230 | |
fb4b4881 JK |
231 | tty_port_init(&mp->port); |
232 | mp->port.ops = &capiminor_port_ops; | |
233 | ||
81d17fe5 | 234 | /* Allocate the least unused minor number. */ |
3d5d30fe | 235 | spin_lock(&capiminors_lock); |
81d17fe5 JK |
236 | for (minor = 0; minor < capi_ttyminors; minor++) |
237 | if (!capiminors[minor]) { | |
238 | capiminors[minor] = mp; | |
239 | break; | |
1da177e4 | 240 | } |
3d5d30fe | 241 | spin_unlock(&capiminors_lock); |
1da177e4 | 242 | |
81d17fe5 | 243 | if (minor == capi_ttyminors) { |
1da177e4 | 244 | printk(KERN_NOTICE "capi: out of minors\n"); |
40fb2d0d | 245 | goto err_out1; |
1da177e4 LT |
246 | } |
247 | ||
81d17fe5 JK |
248 | mp->minor = minor; |
249 | ||
734cc178 JS |
250 | dev = tty_port_register_device(&mp->port, capinc_tty_driver, minor, |
251 | NULL); | |
40fb2d0d JK |
252 | if (IS_ERR(dev)) |
253 | goto err_out2; | |
254 | ||
1da177e4 | 255 | return mp; |
40fb2d0d JK |
256 | |
257 | err_out2: | |
3d5d30fe | 258 | spin_lock(&capiminors_lock); |
40fb2d0d | 259 | capiminors[minor] = NULL; |
3d5d30fe | 260 | spin_unlock(&capiminors_lock); |
40fb2d0d JK |
261 | |
262 | err_out1: | |
55bef83c | 263 | tty_port_put(&mp->port); |
40fb2d0d | 264 | return NULL; |
1da177e4 LT |
265 | } |
266 | ||
40fb2d0d | 267 | static struct capiminor *capiminor_get(unsigned int minor) |
1da177e4 | 268 | { |
81d17fe5 | 269 | struct capiminor *mp; |
1da177e4 | 270 | |
3d5d30fe | 271 | spin_lock(&capiminors_lock); |
81d17fe5 | 272 | mp = capiminors[minor]; |
0159d549 | 273 | if (mp) |
55bef83c | 274 | tty_port_get(&mp->port); |
3d5d30fe | 275 | spin_unlock(&capiminors_lock); |
81d17fe5 JK |
276 | |
277 | return mp; | |
1da177e4 | 278 | } |
1da177e4 | 279 | |
0159d549 JK |
280 | static inline void capiminor_put(struct capiminor *mp) |
281 | { | |
55bef83c | 282 | tty_port_put(&mp->port); |
0159d549 JK |
283 | } |
284 | ||
285 | static void capiminor_free(struct capiminor *mp) | |
286 | { | |
0159d549 JK |
287 | tty_unregister_device(capinc_tty_driver, mp->minor); |
288 | ||
3d5d30fe | 289 | spin_lock(&capiminors_lock); |
0159d549 | 290 | capiminors[mp->minor] = NULL; |
3d5d30fe | 291 | spin_unlock(&capiminors_lock); |
0159d549 JK |
292 | |
293 | capiminor_put(mp); | |
294 | } | |
295 | ||
1da177e4 LT |
296 | /* -------- struct capincci ----------------------------------------- */ |
297 | ||
501c87a9 | 298 | static void capincci_alloc_minor(struct capidev *cdev, struct capincci *np) |
1da177e4 | 299 | { |
1f90d665 JK |
300 | if (cdev->userflags & CAPIFLAG_HIGHJACKING) |
301 | np->minorp = capiminor_alloc(&cdev->ap, np->ncci); | |
501c87a9 JK |
302 | } |
303 | ||
304 | static void capincci_free_minor(struct capincci *np) | |
305 | { | |
306 | struct capiminor *mp = np->minorp; | |
fb4b4881 | 307 | struct tty_struct *tty; |
501c87a9 JK |
308 | |
309 | if (mp) { | |
fb4b4881 JK |
310 | tty = tty_port_tty_get(&mp->port); |
311 | if (tty) { | |
30bced91 | 312 | tty_vhangup(tty); |
fb4b4881 | 313 | tty_kref_put(tty); |
501c87a9 | 314 | } |
fb4b4881 JK |
315 | |
316 | capiminor_free(mp); | |
501c87a9 JK |
317 | } |
318 | } | |
319 | ||
320 | static inline unsigned int capincci_minor_opencount(struct capincci *np) | |
321 | { | |
322 | struct capiminor *mp = np->minorp; | |
a84fdf41 JK |
323 | unsigned int count = 0; |
324 | struct tty_struct *tty; | |
501c87a9 | 325 | |
a84fdf41 JK |
326 | if (mp) { |
327 | tty = tty_port_tty_get(&mp->port); | |
328 | if (tty) { | |
329 | count = tty->count; | |
330 | tty_kref_put(tty); | |
331 | } | |
332 | } | |
333 | return count; | |
501c87a9 JK |
334 | } |
335 | ||
336 | #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
337 | ||
338 | static inline void | |
339 | capincci_alloc_minor(struct capidev *cdev, struct capincci *np) { } | |
340 | static inline void capincci_free_minor(struct capincci *np) { } | |
341 | ||
501c87a9 JK |
342 | #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
343 | ||
344 | static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci) | |
345 | { | |
884f5c44 | 346 | struct capincci *np; |
501c87a9 | 347 | |
54f0fad3 | 348 | np = kzalloc(sizeof(*np), GFP_KERNEL); |
501c87a9 JK |
349 | if (!np) |
350 | return NULL; | |
351 | np->ncci = ncci; | |
352 | np->cdev = cdev; | |
353 | ||
354 | capincci_alloc_minor(cdev, np); | |
355 | ||
884f5c44 JK |
356 | list_add_tail(&np->list, &cdev->nccis); |
357 | ||
358 | return np; | |
1da177e4 LT |
359 | } |
360 | ||
361 | static void capincci_free(struct capidev *cdev, u32 ncci) | |
362 | { | |
884f5c44 | 363 | struct capincci *np, *tmp; |
1da177e4 | 364 | |
884f5c44 | 365 | list_for_each_entry_safe(np, tmp, &cdev->nccis, list) |
1da177e4 | 366 | if (ncci == 0xffffffff || np->ncci == ncci) { |
501c87a9 | 367 | capincci_free_minor(np); |
884f5c44 | 368 | list_del(&np->list); |
1da177e4 | 369 | kfree(np); |
1da177e4 | 370 | } |
1da177e4 LT |
371 | } |
372 | ||
7dc2ce5f | 373 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
1da177e4 LT |
374 | static struct capincci *capincci_find(struct capidev *cdev, u32 ncci) |
375 | { | |
884f5c44 | 376 | struct capincci *np; |
1da177e4 | 377 | |
884f5c44 JK |
378 | list_for_each_entry(np, &cdev->nccis, list) |
379 | if (np->ncci == ncci) | |
380 | return np; | |
381 | return NULL; | |
1da177e4 LT |
382 | } |
383 | ||
1da177e4 LT |
384 | /* -------- handle data queue --------------------------------------- */ |
385 | ||
386 | static struct sk_buff * | |
387 | gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb) | |
388 | { | |
389 | struct sk_buff *nskb; | |
dfbb84ff | 390 | nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_KERNEL); |
1da177e4 | 391 | if (nskb) { |
475be4d8 | 392 | u16 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 4 + 2); |
1da177e4 LT |
393 | unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN); |
394 | capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN); | |
395 | capimsg_setu16(s, 2, mp->ap->applid); | |
396 | capimsg_setu8 (s, 4, CAPI_DATA_B3); | |
397 | capimsg_setu8 (s, 5, CAPI_RESP); | |
42792713 | 398 | capimsg_setu16(s, 6, atomic_inc_return(&mp->msgid)); |
1da177e4 LT |
399 | capimsg_setu32(s, 8, mp->ncci); |
400 | capimsg_setu16(s, 12, datahandle); | |
401 | } | |
402 | return nskb; | |
403 | } | |
404 | ||
405 | static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb) | |
406 | { | |
a11ef7be | 407 | unsigned int datalen = skb->len - CAPIMSG_LEN(skb->data); |
fb4b4881 | 408 | struct tty_struct *tty; |
1da177e4 | 409 | struct sk_buff *nskb; |
1da177e4 LT |
410 | u16 errcode, datahandle; |
411 | struct tty_ldisc *ld; | |
fb4b4881 JK |
412 | int ret = -1; |
413 | ||
fb4b4881 JK |
414 | tty = tty_port_tty_get(&mp->port); |
415 | if (!tty) { | |
8fb53b95 | 416 | pr_debug("capi: currently no receiver\n"); |
1da177e4 LT |
417 | return -1; |
418 | } | |
475be4d8 | 419 | |
fb4b4881 | 420 | ld = tty_ldisc_ref(tty); |
a11ef7be JK |
421 | if (!ld) { |
422 | /* fatal error, do not requeue */ | |
423 | ret = 0; | |
424 | kfree_skb(skb); | |
425 | goto deref_tty; | |
426 | } | |
fb4b4881 | 427 | |
a352def2 | 428 | if (ld->ops->receive_buf == NULL) { |
8fb53b95 | 429 | pr_debug("capi: ldisc has no receive_buf function\n"); |
a11ef7be JK |
430 | /* fatal error, do not requeue */ |
431 | goto free_skb; | |
1da177e4 LT |
432 | } |
433 | if (mp->ttyinstop) { | |
8fb53b95 | 434 | pr_debug("capi: recv tty throttled\n"); |
a11ef7be | 435 | goto deref_ldisc; |
1da177e4 | 436 | } |
a11ef7be | 437 | |
fb4b4881 | 438 | if (tty->receive_room < datalen) { |
8fb53b95 | 439 | pr_debug("capi: no room in tty\n"); |
a11ef7be | 440 | goto deref_ldisc; |
1da177e4 | 441 | } |
a11ef7be JK |
442 | |
443 | nskb = gen_data_b3_resp_for(mp, skb); | |
444 | if (!nskb) { | |
1da177e4 | 445 | printk(KERN_ERR "capi: gen_data_b3_resp failed\n"); |
a11ef7be | 446 | goto deref_ldisc; |
1da177e4 | 447 | } |
a11ef7be JK |
448 | |
449 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4); | |
450 | ||
1da177e4 | 451 | errcode = capi20_put_message(mp->ap, nskb); |
a11ef7be JK |
452 | |
453 | if (errcode == CAPI_NOERROR) { | |
454 | skb_pull(skb, CAPIMSG_LEN(skb->data)); | |
8fb53b95 DM |
455 | pr_debug("capi: DATA_B3_RESP %u len=%d => ldisc\n", |
456 | datahandle, skb->len); | |
a11ef7be JK |
457 | ld->ops->receive_buf(tty, skb->data, NULL, skb->len); |
458 | } else { | |
1da177e4 | 459 | printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n", |
475be4d8 | 460 | errcode); |
1da177e4 | 461 | kfree_skb(nskb); |
a11ef7be JK |
462 | |
463 | if (errcode == CAPI_SENDQUEUEFULL) | |
464 | goto deref_ldisc; | |
1da177e4 | 465 | } |
a11ef7be JK |
466 | |
467 | free_skb: | |
fb4b4881 | 468 | ret = 0; |
a11ef7be JK |
469 | kfree_skb(skb); |
470 | ||
471 | deref_ldisc: | |
1da177e4 | 472 | tty_ldisc_deref(ld); |
a11ef7be JK |
473 | |
474 | deref_tty: | |
fb4b4881 JK |
475 | tty_kref_put(tty); |
476 | return ret; | |
1da177e4 LT |
477 | } |
478 | ||
479 | static void handle_minor_recv(struct capiminor *mp) | |
480 | { | |
481 | struct sk_buff *skb; | |
68d7347b JK |
482 | |
483 | while ((skb = skb_dequeue(&mp->inqueue)) != NULL) | |
1da177e4 LT |
484 | if (handle_recv_skb(mp, skb) < 0) { |
485 | skb_queue_head(&mp->inqueue, skb); | |
1da177e4 LT |
486 | return; |
487 | } | |
1da177e4 LT |
488 | } |
489 | ||
eef0ced0 | 490 | static void handle_minor_send(struct capiminor *mp) |
1da177e4 | 491 | { |
fb4b4881 | 492 | struct tty_struct *tty; |
1da177e4 LT |
493 | struct sk_buff *skb; |
494 | u16 len; | |
1da177e4 LT |
495 | u16 errcode; |
496 | u16 datahandle; | |
497 | ||
fb4b4881 JK |
498 | tty = tty_port_tty_get(&mp->port); |
499 | if (!tty) | |
eef0ced0 | 500 | return; |
fb4b4881 JK |
501 | |
502 | if (mp->ttyoutstop) { | |
8fb53b95 | 503 | pr_debug("capi: send: tty stopped\n"); |
fb4b4881 | 504 | tty_kref_put(tty); |
eef0ced0 | 505 | return; |
1da177e4 LT |
506 | } |
507 | ||
dfbb84ff JK |
508 | while (1) { |
509 | spin_lock_bh(&mp->outlock); | |
510 | skb = __skb_dequeue(&mp->outqueue); | |
511 | if (!skb) { | |
512 | spin_unlock_bh(&mp->outlock); | |
513 | break; | |
514 | } | |
1da177e4 | 515 | len = (u16)skb->len; |
dfbb84ff JK |
516 | mp->outbytes -= len; |
517 | spin_unlock_bh(&mp->outlock); | |
518 | ||
519 | datahandle = atomic_inc_return(&mp->datahandle); | |
1da177e4 LT |
520 | skb_push(skb, CAPI_DATA_B3_REQ_LEN); |
521 | memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN); | |
522 | capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN); | |
523 | capimsg_setu16(skb->data, 2, mp->ap->applid); | |
524 | capimsg_setu8 (skb->data, 4, CAPI_DATA_B3); | |
525 | capimsg_setu8 (skb->data, 5, CAPI_REQ); | |
42792713 | 526 | capimsg_setu16(skb->data, 6, atomic_inc_return(&mp->msgid)); |
1da177e4 | 527 | capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */ |
5e6c20a9 | 528 | capimsg_setu32(skb->data, 12, (u32)(long)skb->data);/* Data32 */ |
1da177e4 LT |
529 | capimsg_setu16(skb->data, 16, len); /* Data length */ |
530 | capimsg_setu16(skb->data, 18, datahandle); | |
531 | capimsg_setu16(skb->data, 20, 0); /* Flags */ | |
532 | ||
501c87a9 | 533 | if (capiminor_add_ack(mp, datahandle) < 0) { |
1da177e4 | 534 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); |
dfbb84ff JK |
535 | |
536 | spin_lock_bh(&mp->outlock); | |
537 | __skb_queue_head(&mp->outqueue, skb); | |
538 | mp->outbytes += len; | |
539 | spin_unlock_bh(&mp->outlock); | |
540 | ||
eef0ced0 | 541 | break; |
1da177e4 LT |
542 | } |
543 | errcode = capi20_put_message(mp->ap, skb); | |
544 | if (errcode == CAPI_NOERROR) { | |
8fb53b95 DM |
545 | pr_debug("capi: DATA_B3_REQ %u len=%u\n", |
546 | datahandle, len); | |
1da177e4 LT |
547 | continue; |
548 | } | |
549 | capiminor_del_ack(mp, datahandle); | |
550 | ||
551 | if (errcode == CAPI_SENDQUEUEFULL) { | |
552 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); | |
dfbb84ff JK |
553 | |
554 | spin_lock_bh(&mp->outlock); | |
555 | __skb_queue_head(&mp->outqueue, skb); | |
556 | mp->outbytes += len; | |
557 | spin_unlock_bh(&mp->outlock); | |
558 | ||
1da177e4 LT |
559 | break; |
560 | } | |
561 | ||
562 | /* ups, drop packet */ | |
563 | printk(KERN_ERR "capi: put_message = %x\n", errcode); | |
1da177e4 LT |
564 | kfree_skb(skb); |
565 | } | |
fb4b4881 | 566 | tty_kref_put(tty); |
1da177e4 LT |
567 | } |
568 | ||
569 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
570 | /* -------- function called by lower level -------------------------- */ | |
571 | ||
572 | static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb) | |
573 | { | |
574 | struct capidev *cdev = ap->private; | |
575 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
576 | struct capiminor *mp; | |
577 | u16 datahandle; | |
1da177e4 | 578 | struct capincci *np; |
7dc2ce5f | 579 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
1da177e4 | 580 | |
05b41494 JK |
581 | mutex_lock(&cdev->lock); |
582 | ||
1da177e4 LT |
583 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) { |
584 | u16 info = CAPIMSG_U16(skb->data, 12); // Info field | |
05b41494 | 585 | if ((info & 0xff00) == 0) |
1da177e4 | 586 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); |
1da177e4 | 587 | } |
05b41494 | 588 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) |
1da177e4 | 589 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); |
05b41494 | 590 | |
1da177e4 LT |
591 | if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) { |
592 | skb_queue_tail(&cdev->recvqueue, skb); | |
593 | wake_up_interruptible(&cdev->recvwait); | |
05b41494 | 594 | goto unlock_out; |
1da177e4 | 595 | } |
05b41494 | 596 | |
7dc2ce5f TS |
597 | #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE |
598 | skb_queue_tail(&cdev->recvqueue, skb); | |
599 | wake_up_interruptible(&cdev->recvwait); | |
600 | ||
601 | #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
602 | ||
05b41494 | 603 | np = capincci_find(cdev, CAPIMSG_CONTROL(skb->data)); |
1da177e4 LT |
604 | if (!np) { |
605 | printk(KERN_ERR "BUG: capi_signal: ncci not found\n"); | |
606 | skb_queue_tail(&cdev->recvqueue, skb); | |
607 | wake_up_interruptible(&cdev->recvwait); | |
05b41494 | 608 | goto unlock_out; |
1da177e4 | 609 | } |
501c87a9 | 610 | |
1da177e4 LT |
611 | mp = np->minorp; |
612 | if (!mp) { | |
613 | skb_queue_tail(&cdev->recvqueue, skb); | |
614 | wake_up_interruptible(&cdev->recvwait); | |
05b41494 | 615 | goto unlock_out; |
1da177e4 | 616 | } |
1da177e4 | 617 | if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) { |
475be4d8 | 618 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 4 + 2); |
8fb53b95 DM |
619 | pr_debug("capi_signal: DATA_B3_IND %u len=%d\n", |
620 | datahandle, skb->len-CAPIMSG_LEN(skb->data)); | |
1da177e4 | 621 | skb_queue_tail(&mp->inqueue, skb); |
68d7347b | 622 | |
1da177e4 LT |
623 | handle_minor_recv(mp); |
624 | ||
625 | } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) { | |
626 | ||
475be4d8 | 627 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4); |
8fb53b95 DM |
628 | pr_debug("capi_signal: DATA_B3_CONF %u 0x%x\n", |
629 | datahandle, | |
475be4d8 | 630 | CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 2)); |
1da177e4 | 631 | kfree_skb(skb); |
2b72b5bd | 632 | capiminor_del_ack(mp, datahandle); |
6aad04f2 | 633 | tty_port_tty_wakeup(&mp->port); |
eef0ced0 | 634 | handle_minor_send(mp); |
1da177e4 LT |
635 | |
636 | } else { | |
637 | /* ups, let capi application handle it :-) */ | |
638 | skb_queue_tail(&cdev->recvqueue, skb); | |
639 | wake_up_interruptible(&cdev->recvwait); | |
640 | } | |
641 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
501c87a9 | 642 | |
05b41494 | 643 | unlock_out: |
05b41494 | 644 | mutex_unlock(&cdev->lock); |
1da177e4 LT |
645 | } |
646 | ||
647 | /* -------- file_operations for capidev ----------------------------- */ | |
648 | ||
649 | static ssize_t | |
650 | capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
651 | { | |
54cbb1ca | 652 | struct capidev *cdev = file->private_data; |
1da177e4 LT |
653 | struct sk_buff *skb; |
654 | size_t copied; | |
28a1dbb6 | 655 | int err; |
1da177e4 LT |
656 | |
657 | if (!cdev->ap.applid) | |
658 | return -ENODEV; | |
659 | ||
28a1dbb6 JK |
660 | skb = skb_dequeue(&cdev->recvqueue); |
661 | if (!skb) { | |
1da177e4 LT |
662 | if (file->f_flags & O_NONBLOCK) |
663 | return -EAGAIN; | |
28a1dbb6 | 664 | err = wait_event_interruptible(cdev->recvwait, |
475be4d8 | 665 | (skb = skb_dequeue(&cdev->recvqueue))); |
28a1dbb6 JK |
666 | if (err) |
667 | return err; | |
1da177e4 LT |
668 | } |
669 | if (skb->len > count) { | |
670 | skb_queue_head(&cdev->recvqueue, skb); | |
671 | return -EMSGSIZE; | |
672 | } | |
673 | if (copy_to_user(buf, skb->data, skb->len)) { | |
674 | skb_queue_head(&cdev->recvqueue, skb); | |
675 | return -EFAULT; | |
676 | } | |
677 | copied = skb->len; | |
678 | ||
679 | kfree_skb(skb); | |
680 | ||
681 | return copied; | |
682 | } | |
683 | ||
684 | static ssize_t | |
685 | capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
686 | { | |
54cbb1ca | 687 | struct capidev *cdev = file->private_data; |
1da177e4 LT |
688 | struct sk_buff *skb; |
689 | u16 mlen; | |
690 | ||
691 | if (!cdev->ap.applid) | |
692 | return -ENODEV; | |
693 | ||
fe163e53 EB |
694 | if (count < CAPIMSG_BASELEN) |
695 | return -EINVAL; | |
696 | ||
1da177e4 LT |
697 | skb = alloc_skb(count, GFP_USER); |
698 | if (!skb) | |
699 | return -ENOMEM; | |
700 | ||
701 | if (copy_from_user(skb_put(skb, count), buf, count)) { | |
702 | kfree_skb(skb); | |
703 | return -EFAULT; | |
704 | } | |
705 | mlen = CAPIMSG_LEN(skb->data); | |
706 | if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) { | |
fe163e53 EB |
707 | if (count < CAPI_DATA_B3_REQ_LEN || |
708 | (size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) { | |
1da177e4 LT |
709 | kfree_skb(skb); |
710 | return -EINVAL; | |
711 | } | |
712 | } else { | |
713 | if (mlen != count) { | |
714 | kfree_skb(skb); | |
715 | return -EINVAL; | |
716 | } | |
717 | } | |
718 | CAPIMSG_SETAPPID(skb->data, cdev->ap.applid); | |
719 | ||
720 | if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) { | |
fe163e53 EB |
721 | if (count < CAPI_DISCONNECT_B3_RESP_LEN) { |
722 | kfree_skb(skb); | |
723 | return -EINVAL; | |
724 | } | |
05b41494 | 725 | mutex_lock(&cdev->lock); |
1da177e4 | 726 | capincci_free(cdev, CAPIMSG_NCCI(skb->data)); |
05b41494 | 727 | mutex_unlock(&cdev->lock); |
1da177e4 LT |
728 | } |
729 | ||
730 | cdev->errcode = capi20_put_message(&cdev->ap, skb); | |
731 | ||
732 | if (cdev->errcode) { | |
733 | kfree_skb(skb); | |
734 | return -EIO; | |
735 | } | |
736 | return count; | |
737 | } | |
738 | ||
afc9a42b | 739 | static __poll_t |
475be4d8 | 740 | capi_poll(struct file *file, poll_table *wait) |
1da177e4 | 741 | { |
54cbb1ca | 742 | struct capidev *cdev = file->private_data; |
afc9a42b | 743 | __poll_t mask = 0; |
1da177e4 LT |
744 | |
745 | if (!cdev->ap.applid) | |
a9a08845 | 746 | return EPOLLERR; |
1da177e4 LT |
747 | |
748 | poll_wait(file, &(cdev->recvwait), wait); | |
a9a08845 | 749 | mask = EPOLLOUT | EPOLLWRNORM; |
3ef7cf57 | 750 | if (!skb_queue_empty_lockless(&cdev->recvqueue)) |
a9a08845 | 751 | mask |= EPOLLIN | EPOLLRDNORM; |
1da177e4 LT |
752 | return mask; |
753 | } | |
754 | ||
755 | static int | |
703c631e | 756 | capi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
757 | { |
758 | struct capidev *cdev = file->private_data; | |
1da177e4 LT |
759 | capi_ioctl_struct data; |
760 | int retval = -EINVAL; | |
761 | void __user *argp = (void __user *)arg; | |
762 | ||
763 | switch (cmd) { | |
764 | case CAPI_REGISTER: | |
05b41494 | 765 | mutex_lock(&cdev->lock); |
1da177e4 | 766 | |
05b41494 JK |
767 | if (cdev->ap.applid) { |
768 | retval = -EEXIST; | |
769 | goto register_out; | |
770 | } | |
771 | if (copy_from_user(&cdev->ap.rparam, argp, | |
772 | sizeof(struct capi_register_params))) { | |
773 | retval = -EFAULT; | |
774 | goto register_out; | |
775 | } | |
776 | cdev->ap.private = cdev; | |
777 | cdev->ap.recv_message = capi_recv_message; | |
778 | cdev->errcode = capi20_register(&cdev->ap); | |
779 | retval = (int)cdev->ap.applid; | |
780 | if (cdev->errcode) { | |
781 | cdev->ap.applid = 0; | |
782 | retval = -EIO; | |
1da177e4 | 783 | } |
05b41494 JK |
784 | |
785 | register_out: | |
786 | mutex_unlock(&cdev->lock); | |
787 | return retval; | |
1da177e4 LT |
788 | |
789 | case CAPI_GET_VERSION: | |
475be4d8 JP |
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; | |
7fdaadcc | 799 | return 0; |
1da177e4 LT |
800 | |
801 | case CAPI_GET_SERIAL: | |
475be4d8 JP |
802 | if (copy_from_user(&data.contr, argp, |
803 | sizeof(data.contr))) | |
804 | return -EFAULT; | |
805 | cdev->errcode = capi20_get_serial(data.contr, data.serial); | |
806 | if (cdev->errcode) | |
807 | return -EIO; | |
808 | if (copy_to_user(argp, data.serial, | |
809 | sizeof(data.serial))) | |
810 | return -EFAULT; | |
7fdaadcc TS |
811 | return 0; |
812 | ||
1da177e4 | 813 | case CAPI_GET_PROFILE: |
475be4d8 JP |
814 | if (copy_from_user(&data.contr, argp, |
815 | sizeof(data.contr))) | |
816 | return -EFAULT; | |
1da177e4 | 817 | |
475be4d8 JP |
818 | if (data.contr == 0) { |
819 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); | |
820 | if (cdev->errcode) | |
821 | return -EIO; | |
1da177e4 | 822 | |
475be4d8 JP |
823 | retval = copy_to_user(argp, |
824 | &data.profile.ncontroller, | |
825 | sizeof(data.profile.ncontroller)); | |
1da177e4 | 826 | |
475be4d8 JP |
827 | } else { |
828 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); | |
829 | if (cdev->errcode) | |
830 | return -EIO; | |
1da177e4 | 831 | |
475be4d8 JP |
832 | retval = copy_to_user(argp, &data.profile, |
833 | sizeof(data.profile)); | |
1da177e4 | 834 | } |
475be4d8 JP |
835 | if (retval) |
836 | return -EFAULT; | |
7fdaadcc | 837 | return 0; |
1da177e4 LT |
838 | |
839 | case CAPI_GET_MANUFACTURER: | |
475be4d8 JP |
840 | if (copy_from_user(&data.contr, argp, |
841 | sizeof(data.contr))) | |
842 | return -EFAULT; | |
843 | cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer); | |
844 | if (cdev->errcode) | |
845 | return -EIO; | |
1da177e4 | 846 | |
475be4d8 JP |
847 | if (copy_to_user(argp, data.manufacturer, |
848 | sizeof(data.manufacturer))) | |
849 | return -EFAULT; | |
1da177e4 | 850 | |
7fdaadcc TS |
851 | return 0; |
852 | ||
1da177e4 LT |
853 | case CAPI_GET_ERRCODE: |
854 | data.errcode = cdev->errcode; | |
855 | cdev->errcode = CAPI_NOERROR; | |
856 | if (arg) { | |
857 | if (copy_to_user(argp, &data.errcode, | |
858 | sizeof(data.errcode))) | |
859 | return -EFAULT; | |
860 | } | |
861 | return data.errcode; | |
862 | ||
863 | case CAPI_INSTALLED: | |
864 | if (capi20_isinstalled() == CAPI_NOERROR) | |
865 | return 0; | |
866 | return -ENXIO; | |
867 | ||
7fdaadcc | 868 | case CAPI_MANUFACTURER_CMD: { |
475be4d8 JP |
869 | struct capi_manufacturer_cmd mcmd; |
870 | if (!capable(CAP_SYS_ADMIN)) | |
871 | return -EPERM; | |
872 | if (copy_from_user(&mcmd, argp, sizeof(mcmd))) | |
873 | return -EFAULT; | |
874 | return capi20_manufacturer(mcmd.cmd, mcmd.data); | |
875 | } | |
1da177e4 | 876 | case CAPI_SET_FLAGS: |
05b41494 JK |
877 | case CAPI_CLR_FLAGS: { |
878 | unsigned userflags; | |
879 | ||
880 | if (copy_from_user(&userflags, argp, sizeof(userflags))) | |
881 | return -EFAULT; | |
1da177e4 | 882 | |
05b41494 JK |
883 | mutex_lock(&cdev->lock); |
884 | if (cmd == CAPI_SET_FLAGS) | |
885 | cdev->userflags |= userflags; | |
886 | else | |
887 | cdev->userflags &= ~userflags; | |
888 | mutex_unlock(&cdev->lock); | |
889 | return 0; | |
890 | } | |
1da177e4 LT |
891 | case CAPI_GET_FLAGS: |
892 | if (copy_to_user(argp, &cdev->userflags, | |
893 | sizeof(cdev->userflags))) | |
894 | return -EFAULT; | |
895 | return 0; | |
896 | ||
7dc2ce5f TS |
897 | #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE |
898 | case CAPI_NCCI_OPENCOUNT: | |
899 | return 0; | |
900 | ||
901 | #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
05b41494 JK |
902 | case CAPI_NCCI_OPENCOUNT: { |
903 | struct capincci *nccip; | |
904 | unsigned ncci; | |
905 | int count = 0; | |
1da177e4 | 906 | |
05b41494 JK |
907 | if (copy_from_user(&ncci, argp, sizeof(ncci))) |
908 | return -EFAULT; | |
909 | ||
910 | mutex_lock(&cdev->lock); | |
911 | nccip = capincci_find(cdev, (u32)ncci); | |
912 | if (nccip) | |
913 | count = capincci_minor_opencount(nccip); | |
914 | mutex_unlock(&cdev->lock); | |
915 | return count; | |
916 | } | |
1da177e4 | 917 | |
05b41494 JK |
918 | case CAPI_NCCI_GETUNIT: { |
919 | struct capincci *nccip; | |
920 | struct capiminor *mp; | |
921 | unsigned ncci; | |
922 | int unit = -ESRCH; | |
923 | ||
924 | if (copy_from_user(&ncci, argp, sizeof(ncci))) | |
925 | return -EFAULT; | |
926 | ||
927 | mutex_lock(&cdev->lock); | |
928 | nccip = capincci_find(cdev, (u32)ncci); | |
929 | if (nccip) { | |
930 | mp = nccip->minorp; | |
931 | if (mp) | |
932 | unit = mp->minor; | |
1da177e4 | 933 | } |
05b41494 JK |
934 | mutex_unlock(&cdev->lock); |
935 | return unit; | |
936 | } | |
1da177e4 | 937 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
05b41494 JK |
938 | |
939 | default: | |
940 | return -EINVAL; | |
1da177e4 | 941 | } |
1da177e4 LT |
942 | } |
943 | ||
703c631e AB |
944 | static long |
945 | capi_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
946 | { | |
947 | int ret; | |
948 | ||
76a64921 | 949 | mutex_lock(&capi_mutex); |
703c631e | 950 | ret = capi_ioctl(file, cmd, arg); |
76a64921 | 951 | mutex_unlock(&capi_mutex); |
703c631e AB |
952 | |
953 | return ret; | |
954 | } | |
955 | ||
5565a3ca AB |
956 | #ifdef CONFIG_COMPAT |
957 | static long | |
958 | capi_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
959 | { | |
960 | int ret; | |
961 | ||
962 | if (cmd == CAPI_MANUFACTURER_CMD) { | |
963 | struct { | |
964 | compat_ulong_t cmd; | |
965 | compat_uptr_t data; | |
966 | } mcmd32; | |
967 | ||
968 | if (!capable(CAP_SYS_ADMIN)) | |
969 | return -EPERM; | |
970 | if (copy_from_user(&mcmd32, compat_ptr(arg), sizeof(mcmd32))) | |
971 | return -EFAULT; | |
972 | ||
973 | mutex_lock(&capi_mutex); | |
974 | ret = capi20_manufacturer(mcmd32.cmd, compat_ptr(mcmd32.data)); | |
975 | mutex_unlock(&capi_mutex); | |
976 | ||
977 | return ret; | |
978 | } | |
979 | ||
980 | return capi_unlocked_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); | |
981 | } | |
982 | #endif | |
983 | ||
eca39dd8 | 984 | static int capi_open(struct inode *inode, struct file *file) |
1da177e4 | 985 | { |
eca39dd8 JK |
986 | struct capidev *cdev; |
987 | ||
988 | cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); | |
989 | if (!cdev) | |
990 | return -ENOMEM; | |
991 | ||
05b41494 | 992 | mutex_init(&cdev->lock); |
eca39dd8 JK |
993 | skb_queue_head_init(&cdev->recvqueue); |
994 | init_waitqueue_head(&cdev->recvwait); | |
884f5c44 | 995 | INIT_LIST_HEAD(&cdev->nccis); |
eca39dd8 JK |
996 | file->private_data = cdev; |
997 | ||
998 | mutex_lock(&capidev_list_lock); | |
999 | list_add_tail(&cdev->list, &capidev_list); | |
1000 | mutex_unlock(&capidev_list_lock); | |
1001 | ||
c5bf68fe | 1002 | return stream_open(inode, file); |
1da177e4 LT |
1003 | } |
1004 | ||
eca39dd8 | 1005 | static int capi_release(struct inode *inode, struct file *file) |
1da177e4 | 1006 | { |
eca39dd8 | 1007 | struct capidev *cdev = file->private_data; |
1da177e4 | 1008 | |
eca39dd8 JK |
1009 | mutex_lock(&capidev_list_lock); |
1010 | list_del(&cdev->list); | |
1011 | mutex_unlock(&capidev_list_lock); | |
1012 | ||
05b41494 | 1013 | if (cdev->ap.applid) |
eca39dd8 | 1014 | capi20_release(&cdev->ap); |
eca39dd8 | 1015 | skb_queue_purge(&cdev->recvqueue); |
eca39dd8 | 1016 | capincci_free(cdev, 0xffffffff); |
eca39dd8 JK |
1017 | |
1018 | kfree(cdev); | |
1da177e4 LT |
1019 | return 0; |
1020 | } | |
1021 | ||
2b8693c0 | 1022 | static const struct file_operations capi_fops = |
1da177e4 LT |
1023 | { |
1024 | .owner = THIS_MODULE, | |
1025 | .llseek = no_llseek, | |
1026 | .read = capi_read, | |
1027 | .write = capi_write, | |
1028 | .poll = capi_poll, | |
703c631e | 1029 | .unlocked_ioctl = capi_unlocked_ioctl, |
5565a3ca AB |
1030 | #ifdef CONFIG_COMPAT |
1031 | .compat_ioctl = capi_compat_ioctl, | |
1032 | #endif | |
1da177e4 LT |
1033 | .open = capi_open, |
1034 | .release = capi_release, | |
1035 | }; | |
1036 | ||
1037 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE | |
1038 | /* -------- tty_operations for capincci ----------------------------- */ | |
1039 | ||
46324511 JK |
1040 | static int |
1041 | capinc_tty_install(struct tty_driver *driver, struct tty_struct *tty) | |
1da177e4 | 1042 | { |
410235fd | 1043 | struct capiminor *mp = capiminor_get(tty->index); |
81f5835e | 1044 | int ret = tty_standard_install(driver, tty); |
46324511 | 1045 | |
81f5835e | 1046 | if (ret == 0) |
46324511 | 1047 | tty->driver_data = mp; |
81f5835e | 1048 | else |
46324511 JK |
1049 | capiminor_put(mp); |
1050 | return ret; | |
1051 | } | |
1da177e4 | 1052 | |
46324511 JK |
1053 | static void capinc_tty_cleanup(struct tty_struct *tty) |
1054 | { | |
1055 | struct capiminor *mp = tty->driver_data; | |
1056 | tty->driver_data = NULL; | |
1057 | capiminor_put(mp); | |
1058 | } | |
1da177e4 | 1059 | |
fb4b4881 | 1060 | static int capinc_tty_open(struct tty_struct *tty, struct file *filp) |
46324511 JK |
1061 | { |
1062 | struct capiminor *mp = tty->driver_data; | |
fb4b4881 JK |
1063 | int err; |
1064 | ||
1065 | err = tty_port_open(&mp->port, tty, filp); | |
1066 | if (err) | |
1067 | return err; | |
1da177e4 | 1068 | |
1da177e4 LT |
1069 | handle_minor_recv(mp); |
1070 | return 0; | |
1071 | } | |
1072 | ||
fb4b4881 | 1073 | static void capinc_tty_close(struct tty_struct *tty, struct file *filp) |
1da177e4 | 1074 | { |
46324511 | 1075 | struct capiminor *mp = tty->driver_data; |
1da177e4 | 1076 | |
fb4b4881 | 1077 | tty_port_close(&mp->port, tty, filp); |
1da177e4 LT |
1078 | } |
1079 | ||
6576c289 | 1080 | static int capinc_tty_write(struct tty_struct *tty, |
1da177e4 LT |
1081 | const unsigned char *buf, int count) |
1082 | { | |
2c8df722 | 1083 | struct capiminor *mp = tty->driver_data; |
1da177e4 LT |
1084 | struct sk_buff *skb; |
1085 | ||
8fb53b95 | 1086 | pr_debug("capinc_tty_write(count=%d)\n", count); |
1da177e4 | 1087 | |
dfbb84ff JK |
1088 | spin_lock_bh(&mp->outlock); |
1089 | skb = mp->outskb; | |
1da177e4 | 1090 | if (skb) { |
dfbb84ff JK |
1091 | mp->outskb = NULL; |
1092 | __skb_queue_tail(&mp->outqueue, skb); | |
1da177e4 LT |
1093 | mp->outbytes += skb->len; |
1094 | } | |
1095 | ||
475be4d8 | 1096 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN + count, GFP_ATOMIC); |
1da177e4 LT |
1097 | if (!skb) { |
1098 | printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n"); | |
dfbb84ff | 1099 | spin_unlock_bh(&mp->outlock); |
1da177e4 LT |
1100 | return -ENOMEM; |
1101 | } | |
1102 | ||
1103 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); | |
59ae1d12 | 1104 | skb_put_data(skb, buf, count); |
1da177e4 | 1105 | |
dfbb84ff | 1106 | __skb_queue_tail(&mp->outqueue, skb); |
1da177e4 | 1107 | mp->outbytes += skb->len; |
dfbb84ff JK |
1108 | spin_unlock_bh(&mp->outlock); |
1109 | ||
eef0ced0 | 1110 | handle_minor_send(mp); |
dfbb84ff | 1111 | |
1da177e4 LT |
1112 | return count; |
1113 | } | |
1114 | ||
f2545a75 | 1115 | static int capinc_tty_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 1116 | { |
2c8df722 | 1117 | struct capiminor *mp = tty->driver_data; |
dfbb84ff | 1118 | bool invoke_send = false; |
1da177e4 | 1119 | struct sk_buff *skb; |
f2545a75 | 1120 | int ret = 1; |
1da177e4 | 1121 | |
8fb53b95 | 1122 | pr_debug("capinc_put_char(%u)\n", ch); |
1da177e4 | 1123 | |
dfbb84ff JK |
1124 | spin_lock_bh(&mp->outlock); |
1125 | skb = mp->outskb; | |
1da177e4 LT |
1126 | if (skb) { |
1127 | if (skb_tailroom(skb) > 0) { | |
634fef61 | 1128 | skb_put_u8(skb, ch); |
dfbb84ff | 1129 | goto unlock_out; |
1da177e4 | 1130 | } |
dfbb84ff JK |
1131 | mp->outskb = NULL; |
1132 | __skb_queue_tail(&mp->outqueue, skb); | |
1da177e4 | 1133 | mp->outbytes += skb->len; |
dfbb84ff | 1134 | invoke_send = true; |
1da177e4 | 1135 | } |
dfbb84ff | 1136 | |
475be4d8 | 1137 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN + CAPI_MAX_BLKSIZE, GFP_ATOMIC); |
1da177e4 LT |
1138 | if (skb) { |
1139 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); | |
634fef61 | 1140 | skb_put_u8(skb, ch); |
dfbb84ff | 1141 | mp->outskb = skb; |
1da177e4 LT |
1142 | } else { |
1143 | printk(KERN_ERR "capinc_put_char: char %u lost\n", ch); | |
f2545a75 | 1144 | ret = 0; |
1da177e4 | 1145 | } |
dfbb84ff JK |
1146 | |
1147 | unlock_out: | |
1148 | spin_unlock_bh(&mp->outlock); | |
1149 | ||
1150 | if (invoke_send) | |
eef0ced0 | 1151 | handle_minor_send(mp); |
dfbb84ff | 1152 | |
f2545a75 | 1153 | return ret; |
1da177e4 LT |
1154 | } |
1155 | ||
1156 | static void capinc_tty_flush_chars(struct tty_struct *tty) | |
1157 | { | |
2c8df722 | 1158 | struct capiminor *mp = tty->driver_data; |
1da177e4 LT |
1159 | struct sk_buff *skb; |
1160 | ||
dfbb84ff JK |
1161 | spin_lock_bh(&mp->outlock); |
1162 | skb = mp->outskb; | |
1da177e4 | 1163 | if (skb) { |
dfbb84ff JK |
1164 | mp->outskb = NULL; |
1165 | __skb_queue_tail(&mp->outqueue, skb); | |
1da177e4 | 1166 | mp->outbytes += skb->len; |
dfbb84ff JK |
1167 | spin_unlock_bh(&mp->outlock); |
1168 | ||
eef0ced0 | 1169 | handle_minor_send(mp); |
dfbb84ff JK |
1170 | } else |
1171 | spin_unlock_bh(&mp->outlock); | |
1172 | ||
1173 | handle_minor_recv(mp); | |
1da177e4 LT |
1174 | } |
1175 | ||
03b3b1a2 | 1176 | static unsigned int capinc_tty_write_room(struct tty_struct *tty) |
1da177e4 | 1177 | { |
2c8df722 | 1178 | struct capiminor *mp = tty->driver_data; |
03b3b1a2 | 1179 | unsigned int room; |
2c8df722 | 1180 | |
1da177e4 LT |
1181 | room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue); |
1182 | room *= CAPI_MAX_BLKSIZE; | |
03b3b1a2 | 1183 | pr_debug("capinc_tty_write_room = %u\n", room); |
1da177e4 LT |
1184 | return room; |
1185 | } | |
1186 | ||
fff4ef17 | 1187 | static unsigned int capinc_tty_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1188 | { |
2c8df722 JK |
1189 | struct capiminor *mp = tty->driver_data; |
1190 | ||
8fb53b95 DM |
1191 | pr_debug("capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n", |
1192 | mp->outbytes, mp->nack, | |
1193 | skb_queue_len(&mp->outqueue), | |
1194 | skb_queue_len(&mp->inqueue)); | |
1da177e4 LT |
1195 | return mp->outbytes; |
1196 | } | |
1197 | ||
2c8df722 | 1198 | static void capinc_tty_throttle(struct tty_struct *tty) |
1da177e4 | 1199 | { |
2c8df722 | 1200 | struct capiminor *mp = tty->driver_data; |
2c8df722 | 1201 | mp->ttyinstop = 1; |
1da177e4 LT |
1202 | } |
1203 | ||
2c8df722 | 1204 | static void capinc_tty_unthrottle(struct tty_struct *tty) |
1da177e4 | 1205 | { |
2c8df722 | 1206 | struct capiminor *mp = tty->driver_data; |
2c8df722 | 1207 | |
2c8df722 JK |
1208 | mp->ttyinstop = 0; |
1209 | handle_minor_recv(mp); | |
1da177e4 LT |
1210 | } |
1211 | ||
1212 | static void capinc_tty_stop(struct tty_struct *tty) | |
1213 | { | |
2c8df722 JK |
1214 | struct capiminor *mp = tty->driver_data; |
1215 | ||
2c8df722 | 1216 | mp->ttyoutstop = 1; |
1da177e4 LT |
1217 | } |
1218 | ||
1219 | static void capinc_tty_start(struct tty_struct *tty) | |
1220 | { | |
2c8df722 | 1221 | struct capiminor *mp = tty->driver_data; |
2c8df722 | 1222 | |
2c8df722 | 1223 | mp->ttyoutstop = 0; |
eef0ced0 | 1224 | handle_minor_send(mp); |
1da177e4 LT |
1225 | } |
1226 | ||
1227 | static void capinc_tty_hangup(struct tty_struct *tty) | |
1228 | { | |
fb4b4881 JK |
1229 | struct capiminor *mp = tty->driver_data; |
1230 | ||
fb4b4881 | 1231 | tty_port_hangup(&mp->port); |
1da177e4 LT |
1232 | } |
1233 | ||
1da177e4 LT |
1234 | static void capinc_tty_send_xchar(struct tty_struct *tty, char ch) |
1235 | { | |
8fb53b95 | 1236 | pr_debug("capinc_tty_send_xchar(%d)\n", ch); |
1da177e4 LT |
1237 | } |
1238 | ||
b68e31d0 | 1239 | static const struct tty_operations capinc_ops = { |
1da177e4 LT |
1240 | .open = capinc_tty_open, |
1241 | .close = capinc_tty_close, | |
1242 | .write = capinc_tty_write, | |
1243 | .put_char = capinc_tty_put_char, | |
1244 | .flush_chars = capinc_tty_flush_chars, | |
1245 | .write_room = capinc_tty_write_room, | |
1246 | .chars_in_buffer = capinc_tty_chars_in_buffer, | |
1da177e4 LT |
1247 | .throttle = capinc_tty_throttle, |
1248 | .unthrottle = capinc_tty_unthrottle, | |
1249 | .stop = capinc_tty_stop, | |
1250 | .start = capinc_tty_start, | |
1251 | .hangup = capinc_tty_hangup, | |
1da177e4 | 1252 | .send_xchar = capinc_tty_send_xchar, |
46324511 JK |
1253 | .install = capinc_tty_install, |
1254 | .cleanup = capinc_tty_cleanup, | |
1da177e4 LT |
1255 | }; |
1256 | ||
e76b1544 | 1257 | static int __init capinc_tty_init(void) |
1da177e4 LT |
1258 | { |
1259 | struct tty_driver *drv; | |
e76b1544 JK |
1260 | int err; |
1261 | ||
1da177e4 LT |
1262 | if (capi_ttyminors > CAPINC_MAX_PORTS) |
1263 | capi_ttyminors = CAPINC_MAX_PORTS; | |
1264 | if (capi_ttyminors <= 0) | |
1265 | capi_ttyminors = CAPINC_NR_PORTS; | |
1266 | ||
6396bb22 | 1267 | capiminors = kcalloc(capi_ttyminors, sizeof(struct capiminor *), |
81d17fe5 JK |
1268 | GFP_KERNEL); |
1269 | if (!capiminors) | |
1da177e4 LT |
1270 | return -ENOMEM; |
1271 | ||
39b7b42b JS |
1272 | drv = tty_alloc_driver(capi_ttyminors, TTY_DRIVER_REAL_RAW | |
1273 | TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_DYNAMIC_DEV); | |
1274 | if (IS_ERR(drv)) { | |
81d17fe5 | 1275 | kfree(capiminors); |
39b7b42b | 1276 | return PTR_ERR(drv); |
81d17fe5 | 1277 | } |
1da177e4 | 1278 | drv->driver_name = "capi_nc"; |
d1cadce1 | 1279 | drv->name = "capi!"; |
e95ac143 | 1280 | drv->major = 0; |
1da177e4 LT |
1281 | drv->minor_start = 0; |
1282 | drv->type = TTY_DRIVER_TYPE_SERIAL; | |
1283 | drv->subtype = SERIAL_TYPE_NORMAL; | |
1284 | drv->init_termios = tty_std_termios; | |
1285 | drv->init_termios.c_iflag = ICRNL; | |
1286 | drv->init_termios.c_oflag = OPOST | ONLCR; | |
1287 | drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
1288 | drv->init_termios.c_lflag = 0; | |
1da177e4 | 1289 | tty_set_operations(drv, &capinc_ops); |
e76b1544 JK |
1290 | |
1291 | err = tty_register_driver(drv); | |
1292 | if (err) { | |
9f90a4dd | 1293 | tty_driver_kref_put(drv); |
81d17fe5 | 1294 | kfree(capiminors); |
1da177e4 | 1295 | printk(KERN_ERR "Couldn't register capi_nc driver\n"); |
e76b1544 | 1296 | return err; |
1da177e4 LT |
1297 | } |
1298 | capinc_tty_driver = drv; | |
1299 | return 0; | |
1300 | } | |
1301 | ||
e76b1544 | 1302 | static void __exit capinc_tty_exit(void) |
1da177e4 | 1303 | { |
e76b1544 | 1304 | tty_unregister_driver(capinc_tty_driver); |
9f90a4dd | 1305 | tty_driver_kref_put(capinc_tty_driver); |
81d17fe5 | 1306 | kfree(capiminors); |
1da177e4 LT |
1307 | } |
1308 | ||
501c87a9 JK |
1309 | #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
1310 | ||
1311 | static inline int capinc_tty_init(void) | |
1312 | { | |
1313 | return 0; | |
1314 | } | |
1315 | ||
1316 | static inline void capinc_tty_exit(void) { } | |
1317 | ||
1318 | #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ | |
1da177e4 LT |
1319 | |
1320 | /* -------- /proc functions ----------------------------------------- */ | |
1321 | ||
1322 | /* | |
1323 | * /proc/capi/capi20: | |
1324 | * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt | |
1325 | */ | |
20fbdc35 | 1326 | static int __maybe_unused capi20_proc_show(struct seq_file *m, void *v) |
1da177e4 | 1327 | { |
475be4d8 | 1328 | struct capidev *cdev; |
1da177e4 | 1329 | struct list_head *l; |
1da177e4 | 1330 | |
b8f433dc | 1331 | mutex_lock(&capidev_list_lock); |
1da177e4 LT |
1332 | list_for_each(l, &capidev_list) { |
1333 | cdev = list_entry(l, struct capidev, list); | |
9a58a80a | 1334 | seq_printf(m, "0 %d %lu %lu %lu %lu\n", |
475be4d8 JP |
1335 | cdev->ap.applid, |
1336 | cdev->ap.nrecvctlpkt, | |
1337 | cdev->ap.nrecvdatapkt, | |
1338 | cdev->ap.nsentctlpkt, | |
1339 | cdev->ap.nsentdatapkt); | |
1da177e4 | 1340 | } |
b8f433dc | 1341 | mutex_unlock(&capidev_list_lock); |
9a58a80a | 1342 | return 0; |
1da177e4 LT |
1343 | } |
1344 | ||
1345 | /* | |
1346 | * /proc/capi/capi20ncci: | |
1347 | * applid ncci | |
1348 | */ | |
20fbdc35 | 1349 | static int __maybe_unused capi20ncci_proc_show(struct seq_file *m, void *v) |
1da177e4 | 1350 | { |
884f5c44 JK |
1351 | struct capidev *cdev; |
1352 | struct capincci *np; | |
1da177e4 | 1353 | |
b8f433dc | 1354 | mutex_lock(&capidev_list_lock); |
884f5c44 | 1355 | list_for_each_entry(cdev, &capidev_list, list) { |
05b41494 | 1356 | mutex_lock(&cdev->lock); |
884f5c44 JK |
1357 | list_for_each_entry(np, &cdev->nccis, list) |
1358 | seq_printf(m, "%d 0x%x\n", cdev->ap.applid, np->ncci); | |
05b41494 | 1359 | mutex_unlock(&cdev->lock); |
1da177e4 | 1360 | } |
b8f433dc | 1361 | mutex_unlock(&capidev_list_lock); |
9a58a80a | 1362 | return 0; |
1da177e4 LT |
1363 | } |
1364 | ||
1da177e4 LT |
1365 | static void __init proc_init(void) |
1366 | { | |
3f3942ac CH |
1367 | proc_create_single("capi/capi20", 0, NULL, capi20_proc_show); |
1368 | proc_create_single("capi/capi20ncci", 0, NULL, capi20ncci_proc_show); | |
1da177e4 LT |
1369 | } |
1370 | ||
1371 | static void __exit proc_exit(void) | |
1372 | { | |
9a58a80a AD |
1373 | remove_proc_entry("capi/capi20", NULL); |
1374 | remove_proc_entry("capi/capi20ncci", NULL); | |
1da177e4 LT |
1375 | } |
1376 | ||
1377 | /* -------- init function and module interface ---------------------- */ | |
1378 | ||
1379 | ||
1da177e4 LT |
1380 | static int __init capi_init(void) |
1381 | { | |
88549d6b | 1382 | const char *compileinfo; |
6d9eac34 | 1383 | int major_ret; |
f59aba2f AB |
1384 | int ret; |
1385 | ||
1386 | ret = kcapi_init(); | |
1387 | if (ret) | |
1388 | return ret; | |
1da177e4 | 1389 | |
6d9eac34 AM |
1390 | major_ret = register_chrdev(capi_major, "capi20", &capi_fops); |
1391 | if (major_ret < 0) { | |
1da177e4 | 1392 | printk(KERN_ERR "capi20: unable to get major %d\n", capi_major); |
f59aba2f | 1393 | kcapi_exit(); |
6d9eac34 | 1394 | return major_ret; |
1da177e4 | 1395 | } |
1aaba11d | 1396 | capi_class = class_create("capi"); |
1da177e4 LT |
1397 | if (IS_ERR(capi_class)) { |
1398 | unregister_chrdev(capi_major, "capi20"); | |
f59aba2f | 1399 | kcapi_exit(); |
1da177e4 LT |
1400 | return PTR_ERR(capi_class); |
1401 | } | |
1402 | ||
d1cadce1 | 1403 | device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi20"); |
1da177e4 | 1404 | |
1da177e4 | 1405 | if (capinc_tty_init() < 0) { |
d78b0368 | 1406 | device_destroy(capi_class, MKDEV(capi_major, 0)); |
56b22935 | 1407 | class_destroy(capi_class); |
1da177e4 | 1408 | unregister_chrdev(capi_major, "capi20"); |
f59aba2f | 1409 | kcapi_exit(); |
1da177e4 LT |
1410 | return -ENOMEM; |
1411 | } | |
1da177e4 LT |
1412 | |
1413 | proc_init(); | |
1414 | ||
1f90d665 | 1415 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
475be4d8 | 1416 | compileinfo = " (middleware)"; |
1da177e4 | 1417 | #else |
475be4d8 | 1418 | compileinfo = " (no middleware)"; |
1da177e4 | 1419 | #endif |
88549d6b JK |
1420 | printk(KERN_NOTICE "CAPI 2.0 started up with major %d%s\n", |
1421 | capi_major, compileinfo); | |
1da177e4 LT |
1422 | |
1423 | return 0; | |
1424 | } | |
1425 | ||
1426 | static void __exit capi_exit(void) | |
1427 | { | |
1428 | proc_exit(); | |
1429 | ||
d78b0368 | 1430 | device_destroy(capi_class, MKDEV(capi_major, 0)); |
56b22935 | 1431 | class_destroy(capi_class); |
1da177e4 | 1432 | unregister_chrdev(capi_major, "capi20"); |
1da177e4 | 1433 | |
1da177e4 | 1434 | capinc_tty_exit(); |
f59aba2f AB |
1435 | |
1436 | kcapi_exit(); | |
1da177e4 LT |
1437 | } |
1438 | ||
1439 | module_init(capi_init); | |
1440 | module_exit(capi_exit); |