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Save sram context after changing MPU, DSP or core clocks
[linux-ginger.git] / drivers / isdn / mISDN / tei.c
blobe04bad6c5bafbf0a13d5978a73b2dd4429edf415
1 /*
2 *
3 * Author Karsten Keil <kkeil@novell.com>
4 *
5 * Copyright 2008 by Karsten Keil <kkeil@novell.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 */
17 #include "layer2.h"
18 #include <linux/random.h>
19 #include "core.h"
20
21 #define ID_REQUEST 1
22 #define ID_ASSIGNED 2
23 #define ID_DENIED 3
24 #define ID_CHK_REQ 4
25 #define ID_CHK_RES 5
26 #define ID_REMOVE 6
27 #define ID_VERIFY 7
28
29 #define TEI_ENTITY_ID 0xf
30
31 #define MGR_PH_ACTIVE 16
32 #define MGR_PH_NOTREADY 17
33
34 #define DATIMER_VAL 10000
35
36 static u_int *debug;
37
38 static struct Fsm deactfsm = {NULL, 0, 0, NULL, NULL};
39 static struct Fsm teifsmu = {NULL, 0, 0, NULL, NULL};
40 static struct Fsm teifsmn = {NULL, 0, 0, NULL, NULL};
41
42 enum {
43 ST_L1_DEACT,
44 ST_L1_DEACT_PENDING,
45 ST_L1_ACTIV,
46 };
47 #define DEACT_STATE_COUNT (ST_L1_ACTIV+1)
48
49 static char *strDeactState[] =
50 {
51 "ST_L1_DEACT",
52 "ST_L1_DEACT_PENDING",
53 "ST_L1_ACTIV",
54 };
55
56 enum {
57 EV_ACTIVATE,
58 EV_ACTIVATE_IND,
59 EV_DEACTIVATE,
60 EV_DEACTIVATE_IND,
61 EV_UI,
62 EV_DATIMER,
63 };
64
65 #define DEACT_EVENT_COUNT (EV_DATIMER+1)
66
67 static char *strDeactEvent[] =
68 {
69 "EV_ACTIVATE",
70 "EV_ACTIVATE_IND",
71 "EV_DEACTIVATE",
72 "EV_DEACTIVATE_IND",
73 "EV_UI",
74 "EV_DATIMER",
75 };
76
77 static void
78 da_debug(struct FsmInst *fi, char *fmt, ...)
79 {
80 struct manager *mgr = fi->userdata;
81 va_list va;
82
83 if (!(*debug & DEBUG_L2_TEIFSM))
84 return;
85 va_start(va, fmt);
86 printk(KERN_DEBUG "mgr(%d): ", mgr->ch.st->dev->id);
87 vprintk(fmt, va);
88 printk("\n");
89 va_end(va);
90 }
91
92 static void
93 da_activate(struct FsmInst *fi, int event, void *arg)
94 {
95 struct manager *mgr = fi->userdata;
96
97 if (fi->state == ST_L1_DEACT_PENDING)
98 mISDN_FsmDelTimer(&mgr->datimer, 1);
99 mISDN_FsmChangeState(fi, ST_L1_ACTIV);
100 }
101
102 static void
103 da_deactivate_ind(struct FsmInst *fi, int event, void *arg)
104 {
105 mISDN_FsmChangeState(fi, ST_L1_DEACT);
106 }
107
108 static void
109 da_deactivate(struct FsmInst *fi, int event, void *arg)
110 {
111 struct manager *mgr = fi->userdata;
112 struct layer2 *l2;
113 u_long flags;
114
115 read_lock_irqsave(&mgr->lock, flags);
116 list_for_each_entry(l2, &mgr->layer2, list) {
117 if (l2->l2m.state > ST_L2_4) {
118 /* have still activ TEI */
119 read_unlock_irqrestore(&mgr->lock, flags);
120 return;
121 }
122 }
123 read_unlock_irqrestore(&mgr->lock, flags);
124 /* All TEI are inactiv */
125 if (!test_bit(OPTION_L1_HOLD, &mgr->options)) {
126 mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER,
127 NULL, 1);
128 mISDN_FsmChangeState(fi, ST_L1_DEACT_PENDING);
129 }
130 }
131
132 static void
133 da_ui(struct FsmInst *fi, int event, void *arg)
134 {
135 struct manager *mgr = fi->userdata;
136
137 /* restart da timer */
138 if (!test_bit(OPTION_L1_HOLD, &mgr->options)) {
139 mISDN_FsmDelTimer(&mgr->datimer, 2);
140 mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER,
141 NULL, 2);
142 }
143 }
144
145 static void
146 da_timer(struct FsmInst *fi, int event, void *arg)
147 {
148 struct manager *mgr = fi->userdata;
149 struct layer2 *l2;
150 u_long flags;
151
152 /* check again */
153 read_lock_irqsave(&mgr->lock, flags);
154 list_for_each_entry(l2, &mgr->layer2, list) {
155 if (l2->l2m.state > ST_L2_4) {
156 /* have still activ TEI */
157 read_unlock_irqrestore(&mgr->lock, flags);
158 mISDN_FsmChangeState(fi, ST_L1_ACTIV);
159 return;
160 }
161 }
162 read_unlock_irqrestore(&mgr->lock, flags);
163 /* All TEI are inactiv */
164 mISDN_FsmChangeState(fi, ST_L1_DEACT);
165 _queue_data(&mgr->ch, PH_DEACTIVATE_REQ, MISDN_ID_ANY, 0, NULL,
166 GFP_ATOMIC);
167 }
168
169 static struct FsmNode DeactFnList[] =
170 {
171 {ST_L1_DEACT, EV_ACTIVATE_IND, da_activate},
172 {ST_L1_ACTIV, EV_DEACTIVATE_IND, da_deactivate_ind},
173 {ST_L1_ACTIV, EV_DEACTIVATE, da_deactivate},
174 {ST_L1_DEACT_PENDING, EV_ACTIVATE, da_activate},
175 {ST_L1_DEACT_PENDING, EV_UI, da_ui},
176 {ST_L1_DEACT_PENDING, EV_DATIMER, da_timer},
177 };
178
179 enum {
180 ST_TEI_NOP,
181 ST_TEI_IDREQ,
182 ST_TEI_IDVERIFY,
183 };
184
185 #define TEI_STATE_COUNT (ST_TEI_IDVERIFY+1)
186
187 static char *strTeiState[] =
188 {
189 "ST_TEI_NOP",
190 "ST_TEI_IDREQ",
191 "ST_TEI_IDVERIFY",
192 };
193
194 enum {
195 EV_IDREQ,
196 EV_ASSIGN,
197 EV_ASSIGN_REQ,
198 EV_DENIED,
199 EV_CHKREQ,
200 EV_CHKRESP,
201 EV_REMOVE,
202 EV_VERIFY,
203 EV_TIMER,
204 };
205
206 #define TEI_EVENT_COUNT (EV_TIMER+1)
207
208 static char *strTeiEvent[] =
209 {
210 "EV_IDREQ",
211 "EV_ASSIGN",
212 "EV_ASSIGN_REQ",
213 "EV_DENIED",
214 "EV_CHKREQ",
215 "EV_CHKRESP",
216 "EV_REMOVE",
217 "EV_VERIFY",
218 "EV_TIMER",
219 };
220
221 static void
222 tei_debug(struct FsmInst *fi, char *fmt, ...)
223 {
224 struct teimgr *tm = fi->userdata;
225 va_list va;
226
227 if (!(*debug & DEBUG_L2_TEIFSM))
228 return;
229 va_start(va, fmt);
230 printk(KERN_DEBUG "sapi(%d) tei(%d): ", tm->l2->sapi, tm->l2->tei);
231 vprintk(fmt, va);
232 printk("\n");
233 va_end(va);
234 }
235
236
237
238 static int
239 get_free_id(struct manager *mgr)
240 {
241 u64 ids = 0;
242 int i;
243 struct layer2 *l2;
244
245 list_for_each_entry(l2, &mgr->layer2, list) {
246 if (l2->ch.nr > 63) {
247 printk(KERN_WARNING
248 "%s: more as 63 layer2 for one device\n",
249 __func__);
250 return -EBUSY;
251 }
252 test_and_set_bit(l2->ch.nr, (u_long *)&ids);
253 }
254 for (i = 1; i < 64; i++)
255 if (!test_bit(i, (u_long *)&ids))
256 return i;
257 printk(KERN_WARNING "%s: more as 63 layer2 for one device\n",
258 __func__);
259 return -EBUSY;
260 }
261
262 static int
263 get_free_tei(struct manager *mgr)
264 {
265 u64 ids = 0;
266 int i;
267 struct layer2 *l2;
268
269 list_for_each_entry(l2, &mgr->layer2, list) {
270 if (l2->ch.nr == 0)
271 continue;
272 if ((l2->ch.addr & 0xff) != 0)
273 continue;
274 i = l2->ch.addr >> 8;
275 if (i < 64)
276 continue;
277 i -= 64;
278
279 test_and_set_bit(i, (u_long *)&ids);
280 }
281 for (i = 0; i < 64; i++)
282 if (!test_bit(i, (u_long *)&ids))
283 return i + 64;
284 printk(KERN_WARNING "%s: more as 63 dynamic tei for one device\n",
285 __func__);
286 return -1;
287 }
288
289 static void
290 teiup_create(struct manager *mgr, u_int prim, int len, void *arg)
291 {
292 struct sk_buff *skb;
293 struct mISDNhead *hh;
294 int err;
295
296 skb = mI_alloc_skb(len, GFP_ATOMIC);
297 if (!skb)
298 return;
299 hh = mISDN_HEAD_P(skb);
300 hh->prim = prim;
301 hh->id = (mgr->ch.nr << 16) | mgr->ch.addr;
302 if (len)
303 memcpy(skb_put(skb, len), arg, len);
304 err = mgr->up->send(mgr->up, skb);
305 if (err) {
306 printk(KERN_WARNING "%s: err=%d\n", __func__, err);
307 dev_kfree_skb(skb);
308 }
309 }
310
311 static u_int
312 new_id(struct manager *mgr)
313 {
314 u_int id;
315
316 id = mgr->nextid++;
317 if (id == 0x7fff)
318 mgr->nextid = 1;
319 id <<= 16;
320 id |= GROUP_TEI << 8;
321 id |= TEI_SAPI;
322 return id;
323 }
324
325 static void
326 do_send(struct manager *mgr)
327 {
328 if (!test_bit(MGR_PH_ACTIVE, &mgr->options))
329 return;
330
331 if (!test_and_set_bit(MGR_PH_NOTREADY, &mgr->options)) {
332 struct sk_buff *skb = skb_dequeue(&mgr->sendq);
333
334 if (!skb) {
335 test_and_clear_bit(MGR_PH_NOTREADY, &mgr->options);
336 return;
337 }
338 mgr->lastid = mISDN_HEAD_ID(skb);
339 mISDN_FsmEvent(&mgr->deact, EV_UI, NULL);
340 if (mgr->ch.recv(mgr->ch.peer, skb)) {
341 dev_kfree_skb(skb);
342 test_and_clear_bit(MGR_PH_NOTREADY, &mgr->options);
343 mgr->lastid = MISDN_ID_NONE;
344 }
345 }
346 }
347
348 static void
349 do_ack(struct manager *mgr, u_int id)
350 {
351 if (test_bit(MGR_PH_NOTREADY, &mgr->options)) {
352 if (id == mgr->lastid) {
353 if (test_bit(MGR_PH_ACTIVE, &mgr->options)) {
354 struct sk_buff *skb;
355
356 skb = skb_dequeue(&mgr->sendq);
357 if (skb) {
358 mgr->lastid = mISDN_HEAD_ID(skb);
359 if (!mgr->ch.recv(mgr->ch.peer, skb))
360 return;
361 dev_kfree_skb(skb);
362 }
363 }
364 mgr->lastid = MISDN_ID_NONE;
365 test_and_clear_bit(MGR_PH_NOTREADY, &mgr->options);
366 }
367 }
368 }
369
370 static void
371 mgr_send_down(struct manager *mgr, struct sk_buff *skb)
372 {
373 skb_queue_tail(&mgr->sendq, skb);
374 if (!test_bit(MGR_PH_ACTIVE, &mgr->options)) {
375 _queue_data(&mgr->ch, PH_ACTIVATE_REQ, MISDN_ID_ANY, 0,
376 NULL, GFP_KERNEL);
377 } else {
378 do_send(mgr);
379 }
380 }
381
382 static int
383 dl_unit_data(struct manager *mgr, struct sk_buff *skb)
384 {
385 if (!test_bit(MGR_OPT_NETWORK, &mgr->options)) /* only net send UI */
386 return -EINVAL;
387 if (!test_bit(MGR_PH_ACTIVE, &mgr->options))
388 _queue_data(&mgr->ch, PH_ACTIVATE_REQ, MISDN_ID_ANY, 0,
389 NULL, GFP_KERNEL);
390 skb_push(skb, 3);
391 skb->data[0] = 0x02; /* SAPI 0 C/R = 1 */
392 skb->data[1] = 0xff; /* TEI 127 */
393 skb->data[2] = UI; /* UI frame */
394 mISDN_HEAD_PRIM(skb) = PH_DATA_REQ;
395 mISDN_HEAD_ID(skb) = new_id(mgr);
396 skb_queue_tail(&mgr->sendq, skb);
397 do_send(mgr);
398 return 0;
399 }
400
401 static unsigned int
402 random_ri(void)
403 {
404 u16 x;
405
406 get_random_bytes(&x, sizeof(x));
407 return x;
408 }
409
410 static struct layer2 *
411 findtei(struct manager *mgr, int tei)
412 {
413 struct layer2 *l2;
414 u_long flags;
415
416 read_lock_irqsave(&mgr->lock, flags);
417 list_for_each_entry(l2, &mgr->layer2, list) {
418 if ((l2->sapi == 0) && (l2->tei > 0) &&
419 (l2->tei != GROUP_TEI) && (l2->tei == tei))
420 goto done;
421 }
422 l2 = NULL;
423 done:
424 read_unlock_irqrestore(&mgr->lock, flags);
425 return l2;
426 }
427
428 static void
429 put_tei_msg(struct manager *mgr, u_char m_id, unsigned int ri, int tei)
430 {
431 struct sk_buff *skb;
432 u_char bp[8];
433
434 bp[0] = (TEI_SAPI << 2);
435 if (test_bit(MGR_OPT_NETWORK, &mgr->options))
436 bp[0] |= 2; /* CR:=1 for net command */
437 bp[1] = (GROUP_TEI << 1) | 0x1;
438 bp[2] = UI;
439 bp[3] = TEI_ENTITY_ID;
440 bp[4] = ri >> 8;
441 bp[5] = ri & 0xff;
442 bp[6] = m_id;
443 bp[7] = ((tei << 1) & 0xff) | 1;
444 skb = _alloc_mISDN_skb(PH_DATA_REQ, new_id(mgr), 8, bp, GFP_ATOMIC);
445 if (!skb) {
446 printk(KERN_WARNING "%s: no skb for tei msg\n", __func__);
447 return;
448 }
449 mgr_send_down(mgr, skb);
450 }
451
452 static void
453 tei_id_request(struct FsmInst *fi, int event, void *arg)
454 {
455 struct teimgr *tm = fi->userdata;
456
457 if (tm->l2->tei != GROUP_TEI) {
458 tm->tei_m.printdebug(&tm->tei_m,
459 "assign request for allready assigned tei %d",
460 tm->l2->tei);
461 return;
462 }
463 tm->ri = random_ri();
464 if (*debug & DEBUG_L2_TEI)
465 tm->tei_m.printdebug(&tm->tei_m,
466 "assign request ri %d", tm->ri);
467 put_tei_msg(tm->mgr, ID_REQUEST, tm->ri, GROUP_TEI);
468 mISDN_FsmChangeState(fi, ST_TEI_IDREQ);
469 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 1);
470 tm->nval = 3;
471 }
472
473 static void
474 tei_id_assign(struct FsmInst *fi, int event, void *arg)
475 {
476 struct teimgr *tm = fi->userdata;
477 struct layer2 *l2;
478 u_char *dp = arg;
479 int ri, tei;
480
481 ri = ((unsigned int) *dp++ << 8);
482 ri += *dp++;
483 dp++;
484 tei = *dp >> 1;
485 if (*debug & DEBUG_L2_TEI)
486 tm->tei_m.printdebug(fi, "identity assign ri %d tei %d",
487 ri, tei);
488 l2 = findtei(tm->mgr, tei);
489 if (l2) { /* same tei is in use */
490 if (ri != l2->tm->ri) {
491 tm->tei_m.printdebug(fi,
492 "possible duplicate assignment tei %d", tei);
493 tei_l2(l2, MDL_ERROR_RSP, 0);
494 }
495 } else if (ri == tm->ri) {
496 mISDN_FsmDelTimer(&tm->timer, 1);
497 mISDN_FsmChangeState(fi, ST_TEI_NOP);
498 tei_l2(tm->l2, MDL_ASSIGN_REQ, tei);
499 }
500 }
501
502 static void
503 tei_id_test_dup(struct FsmInst *fi, int event, void *arg)
504 {
505 struct teimgr *tm = fi->userdata;
506 struct layer2 *l2;
507 u_char *dp = arg;
508 int tei, ri;
509
510 ri = ((unsigned int) *dp++ << 8);
511 ri += *dp++;
512 dp++;
513 tei = *dp >> 1;
514 if (*debug & DEBUG_L2_TEI)
515 tm->tei_m.printdebug(fi, "foreign identity assign ri %d tei %d",
516 ri, tei);
517 l2 = findtei(tm->mgr, tei);
518 if (l2) { /* same tei is in use */
519 if (ri != l2->tm->ri) { /* and it wasn't our request */
520 tm->tei_m.printdebug(fi,
521 "possible duplicate assignment tei %d", tei);
522 mISDN_FsmEvent(&l2->tm->tei_m, EV_VERIFY, NULL);
523 }
524 }
525 }
526
527 static void
528 tei_id_denied(struct FsmInst *fi, int event, void *arg)
529 {
530 struct teimgr *tm = fi->userdata;
531 u_char *dp = arg;
532 int ri, tei;
533
534 ri = ((unsigned int) *dp++ << 8);
535 ri += *dp++;
536 dp++;
537 tei = *dp >> 1;
538 if (*debug & DEBUG_L2_TEI)
539 tm->tei_m.printdebug(fi, "identity denied ri %d tei %d",
540 ri, tei);
541 }
542
543 static void
544 tei_id_chk_req(struct FsmInst *fi, int event, void *arg)
545 {
546 struct teimgr *tm = fi->userdata;
547 u_char *dp = arg;
548 int tei;
549
550 tei = *(dp+3) >> 1;
551 if (*debug & DEBUG_L2_TEI)
552 tm->tei_m.printdebug(fi, "identity check req tei %d", tei);
553 if ((tm->l2->tei != GROUP_TEI) && ((tei == GROUP_TEI) ||
554 (tei == tm->l2->tei))) {
555 mISDN_FsmDelTimer(&tm->timer, 4);
556 mISDN_FsmChangeState(&tm->tei_m, ST_TEI_NOP);
557 put_tei_msg(tm->mgr, ID_CHK_RES, random_ri(), tm->l2->tei);
558 }
559 }
560
561 static void
562 tei_id_remove(struct FsmInst *fi, int event, void *arg)
563 {
564 struct teimgr *tm = fi->userdata;
565 u_char *dp = arg;
566 int tei;
567
568 tei = *(dp+3) >> 1;
569 if (*debug & DEBUG_L2_TEI)
570 tm->tei_m.printdebug(fi, "identity remove tei %d", tei);
571 if ((tm->l2->tei != GROUP_TEI) &&
572 ((tei == GROUP_TEI) || (tei == tm->l2->tei))) {
573 mISDN_FsmDelTimer(&tm->timer, 5);
574 mISDN_FsmChangeState(&tm->tei_m, ST_TEI_NOP);
575 tei_l2(tm->l2, MDL_REMOVE_REQ, 0);
576 }
577 }
578
579 static void
580 tei_id_verify(struct FsmInst *fi, int event, void *arg)
581 {
582 struct teimgr *tm = fi->userdata;
583
584 if (*debug & DEBUG_L2_TEI)
585 tm->tei_m.printdebug(fi, "id verify request for tei %d",
586 tm->l2->tei);
587 put_tei_msg(tm->mgr, ID_VERIFY, 0, tm->l2->tei);
588 mISDN_FsmChangeState(&tm->tei_m, ST_TEI_IDVERIFY);
589 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 2);
590 tm->nval = 2;
591 }
592
593 static void
594 tei_id_req_tout(struct FsmInst *fi, int event, void *arg)
595 {
596 struct teimgr *tm = fi->userdata;
597
598 if (--tm->nval) {
599 tm->ri = random_ri();
600 if (*debug & DEBUG_L2_TEI)
601 tm->tei_m.printdebug(fi, "assign req(%d) ri %d",
602 4 - tm->nval, tm->ri);
603 put_tei_msg(tm->mgr, ID_REQUEST, tm->ri, GROUP_TEI);
604 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 3);
605 } else {
606 tm->tei_m.printdebug(fi, "assign req failed");
607 tei_l2(tm->l2, MDL_ERROR_RSP, 0);
608 mISDN_FsmChangeState(fi, ST_TEI_NOP);
609 }
610 }
611
612 static void
613 tei_id_ver_tout(struct FsmInst *fi, int event, void *arg)
614 {
615 struct teimgr *tm = fi->userdata;
616
617 if (--tm->nval) {
618 if (*debug & DEBUG_L2_TEI)
619 tm->tei_m.printdebug(fi,
620 "id verify req(%d) for tei %d",
621 3 - tm->nval, tm->l2->tei);
622 put_tei_msg(tm->mgr, ID_VERIFY, 0, tm->l2->tei);
623 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 4);
624 } else {
625 tm->tei_m.printdebug(fi, "verify req for tei %d failed",
626 tm->l2->tei);
627 tei_l2(tm->l2, MDL_REMOVE_REQ, 0);
628 mISDN_FsmChangeState(fi, ST_TEI_NOP);
629 }
630 }
631
632 static struct FsmNode TeiFnListUser[] =
633 {
634 {ST_TEI_NOP, EV_IDREQ, tei_id_request},
635 {ST_TEI_NOP, EV_ASSIGN, tei_id_test_dup},
636 {ST_TEI_NOP, EV_VERIFY, tei_id_verify},
637 {ST_TEI_NOP, EV_REMOVE, tei_id_remove},
638 {ST_TEI_NOP, EV_CHKREQ, tei_id_chk_req},
639 {ST_TEI_IDREQ, EV_TIMER, tei_id_req_tout},
640 {ST_TEI_IDREQ, EV_ASSIGN, tei_id_assign},
641 {ST_TEI_IDREQ, EV_DENIED, tei_id_denied},
642 {ST_TEI_IDVERIFY, EV_TIMER, tei_id_ver_tout},
643 {ST_TEI_IDVERIFY, EV_REMOVE, tei_id_remove},
644 {ST_TEI_IDVERIFY, EV_CHKREQ, tei_id_chk_req},
645 };
646
647 static void
648 tei_l2remove(struct layer2 *l2)
649 {
650 put_tei_msg(l2->tm->mgr, ID_REMOVE, 0, l2->tei);
651 tei_l2(l2, MDL_REMOVE_REQ, 0);
652 list_del(&l2->ch.list);
653 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
654 }
655
656 static void
657 tei_assign_req(struct FsmInst *fi, int event, void *arg)
658 {
659 struct teimgr *tm = fi->userdata;
660 u_char *dp = arg;
661
662 if (tm->l2->tei == GROUP_TEI) {
663 tm->tei_m.printdebug(&tm->tei_m,
664 "net tei assign request without tei");
665 return;
666 }
667 tm->ri = ((unsigned int) *dp++ << 8);
668 tm->ri += *dp++;
669 if (*debug & DEBUG_L2_TEI)
670 tm->tei_m.printdebug(&tm->tei_m,
671 "net assign request ri %d teim %d", tm->ri, *dp);
672 put_tei_msg(tm->mgr, ID_ASSIGNED, tm->ri, tm->l2->tei);
673 mISDN_FsmChangeState(fi, ST_TEI_NOP);
674 }
675
676 static void
677 tei_id_chk_req_net(struct FsmInst *fi, int event, void *arg)
678 {
679 struct teimgr *tm = fi->userdata;
680
681 if (*debug & DEBUG_L2_TEI)
682 tm->tei_m.printdebug(fi, "id check request for tei %d",
683 tm->l2->tei);
684 tm->rcnt = 0;
685 put_tei_msg(tm->mgr, ID_CHK_REQ, 0, tm->l2->tei);
686 mISDN_FsmChangeState(&tm->tei_m, ST_TEI_IDVERIFY);
687 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 2);
688 tm->nval = 2;
689 }
690
691 static void
692 tei_id_chk_resp(struct FsmInst *fi, int event, void *arg)
693 {
694 struct teimgr *tm = fi->userdata;
695 u_char *dp = arg;
696 int tei;
697
698 tei = dp[3] >> 1;
699 if (*debug & DEBUG_L2_TEI)
700 tm->tei_m.printdebug(fi, "identity check resp tei %d", tei);
701 if (tei == tm->l2->tei)
702 tm->rcnt++;
703 }
704
705 static void
706 tei_id_verify_net(struct FsmInst *fi, int event, void *arg)
707 {
708 struct teimgr *tm = fi->userdata;
709 u_char *dp = arg;
710 int tei;
711
712 tei = dp[3] >> 1;
713 if (*debug & DEBUG_L2_TEI)
714 tm->tei_m.printdebug(fi, "identity verify req tei %d/%d",
715 tei, tm->l2->tei);
716 if (tei == tm->l2->tei)
717 tei_id_chk_req_net(fi, event, arg);
718 }
719
720 static void
721 tei_id_ver_tout_net(struct FsmInst *fi, int event, void *arg)
722 {
723 struct teimgr *tm = fi->userdata;
724
725 if (tm->rcnt == 1) {
726 if (*debug & DEBUG_L2_TEI)
727 tm->tei_m.printdebug(fi,
728 "check req for tei %d sucessful\n", tm->l2->tei);
729 mISDN_FsmChangeState(fi, ST_TEI_NOP);
730 } else if (tm->rcnt > 1) {
731 /* duplicate assignment; remove */
732 tei_l2remove(tm->l2);
733 } else if (--tm->nval) {
734 if (*debug & DEBUG_L2_TEI)
735 tm->tei_m.printdebug(fi,
736 "id check req(%d) for tei %d",
737 3 - tm->nval, tm->l2->tei);
738 put_tei_msg(tm->mgr, ID_CHK_REQ, 0, tm->l2->tei);
739 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 4);
740 } else {
741 tm->tei_m.printdebug(fi, "check req for tei %d failed",
742 tm->l2->tei);
743 mISDN_FsmChangeState(fi, ST_TEI_NOP);
744 tei_l2remove(tm->l2);
745 }
746 }
747
748 static struct FsmNode TeiFnListNet[] =
749 {
750 {ST_TEI_NOP, EV_ASSIGN_REQ, tei_assign_req},
751 {ST_TEI_NOP, EV_VERIFY, tei_id_verify_net},
752 {ST_TEI_NOP, EV_CHKREQ, tei_id_chk_req_net},
753 {ST_TEI_IDVERIFY, EV_TIMER, tei_id_ver_tout_net},
754 {ST_TEI_IDVERIFY, EV_CHKRESP, tei_id_chk_resp},
755 };
756
757 static void
758 tei_ph_data_ind(struct teimgr *tm, u_int mt, u_char *dp, int len)
759 {
760 if (test_bit(FLG_FIXED_TEI, &tm->l2->flag))
761 return;
762 if (*debug & DEBUG_L2_TEI)
763 tm->tei_m.printdebug(&tm->tei_m, "tei handler mt %x", mt);
764 if (mt == ID_ASSIGNED)
765 mISDN_FsmEvent(&tm->tei_m, EV_ASSIGN, dp);
766 else if (mt == ID_DENIED)
767 mISDN_FsmEvent(&tm->tei_m, EV_DENIED, dp);
768 else if (mt == ID_CHK_REQ)
769 mISDN_FsmEvent(&tm->tei_m, EV_CHKREQ, dp);
770 else if (mt == ID_REMOVE)
771 mISDN_FsmEvent(&tm->tei_m, EV_REMOVE, dp);
772 else if (mt == ID_VERIFY)
773 mISDN_FsmEvent(&tm->tei_m, EV_VERIFY, dp);
774 else if (mt == ID_CHK_RES)
775 mISDN_FsmEvent(&tm->tei_m, EV_CHKRESP, dp);
776 }
777
778 static struct layer2 *
779 create_new_tei(struct manager *mgr, int tei, int sapi)
780 {
781 u_long opt = 0;
782 u_long flags;
783 int id;
784 struct layer2 *l2;
785
786 if (!mgr->up)
787 return NULL;
788 if ((tei >= 0) && (tei < 64))
789 test_and_set_bit(OPTION_L2_FIXEDTEI, &opt);
790 if (mgr->ch.st->dev->Dprotocols
791 & ((1 << ISDN_P_TE_E1) | (1 << ISDN_P_NT_E1)))
792 test_and_set_bit(OPTION_L2_PMX, &opt);
793 l2 = create_l2(mgr->up, ISDN_P_LAPD_NT, opt, tei, sapi);
794 if (!l2) {
795 printk(KERN_WARNING "%s:no memory for layer2\n", __func__);
796 return NULL;
797 }
798 l2->tm = kzalloc(sizeof(struct teimgr), GFP_KERNEL);
799 if (!l2->tm) {
800 kfree(l2);
801 printk(KERN_WARNING "%s:no memory for teimgr\n", __func__);
802 return NULL;
803 }
804 l2->tm->mgr = mgr;
805 l2->tm->l2 = l2;
806 l2->tm->tei_m.debug = *debug & DEBUG_L2_TEIFSM;
807 l2->tm->tei_m.userdata = l2->tm;
808 l2->tm->tei_m.printdebug = tei_debug;
809 l2->tm->tei_m.fsm = &teifsmn;
810 l2->tm->tei_m.state = ST_TEI_NOP;
811 l2->tm->tval = 2000; /* T202 2 sec */
812 mISDN_FsmInitTimer(&l2->tm->tei_m, &l2->tm->timer);
813 write_lock_irqsave(&mgr->lock, flags);
814 id = get_free_id(mgr);
815 list_add_tail(&l2->list, &mgr->layer2);
816 write_unlock_irqrestore(&mgr->lock, flags);
817 if (id < 0) {
818 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
819 printk(KERN_WARNING "%s:no free id\n", __func__);
820 return NULL;
821 } else {
822 l2->ch.nr = id;
823 __add_layer2(&l2->ch, mgr->ch.st);
824 l2->ch.recv = mgr->ch.recv;
825 l2->ch.peer = mgr->ch.peer;
826 l2->ch.ctrl(&l2->ch, OPEN_CHANNEL, NULL);
827 }
828 return l2;
829 }
830
831 static void
832 new_tei_req(struct manager *mgr, u_char *dp)
833 {
834 int tei, ri;
835 struct layer2 *l2;
836
837 ri = dp[0] << 8;
838 ri += dp[1];
839 if (!mgr->up)
840 goto denied;
841 if (!(dp[3] & 1)) /* Extension bit != 1 */
842 goto denied;
843 if (dp[3] != 0xff)
844 tei = dp[3] >> 1; /* 3GPP TS 08.56 6.1.11.2 */
845 else
846 tei = get_free_tei(mgr);
847 if (tei < 0) {
848 printk(KERN_WARNING "%s:No free tei\n", __func__);
849 goto denied;
850 }
851 l2 = create_new_tei(mgr, tei, CTRL_SAPI);
852 if (!l2)
853 goto denied;
854 else
855 mISDN_FsmEvent(&l2->tm->tei_m, EV_ASSIGN_REQ, dp);
856 return;
857 denied:
858 put_tei_msg(mgr, ID_DENIED, ri, GROUP_TEI);
859 }
860
861 static int
862 ph_data_ind(struct manager *mgr, struct sk_buff *skb)
863 {
864 int ret = -EINVAL;
865 struct layer2 *l2, *nl2;
866 u_char mt;
867
868 if (skb->len < 8) {
869 if (*debug & DEBUG_L2_TEI)
870 printk(KERN_DEBUG "%s: short mgr frame %d/8\n",
871 __func__, skb->len);
872 goto done;
873 }
874
875 if ((skb->data[0] >> 2) != TEI_SAPI) /* not for us */
876 goto done;
877 if (skb->data[0] & 1) /* EA0 formal error */
878 goto done;
879 if (!(skb->data[1] & 1)) /* EA1 formal error */
880 goto done;
881 if ((skb->data[1] >> 1) != GROUP_TEI) /* not for us */
882 goto done;
883 if ((skb->data[2] & 0xef) != UI) /* not UI */
884 goto done;
885 if (skb->data[3] != TEI_ENTITY_ID) /* not tei entity */
886 goto done;
887 mt = skb->data[6];
888 switch (mt) {
889 case ID_REQUEST:
890 case ID_CHK_RES:
891 case ID_VERIFY:
892 if (!test_bit(MGR_OPT_NETWORK, &mgr->options))
893 goto done;
894 break;
895 case ID_ASSIGNED:
896 case ID_DENIED:
897 case ID_CHK_REQ:
898 case ID_REMOVE:
899 if (test_bit(MGR_OPT_NETWORK, &mgr->options))
900 goto done;
901 break;
902 default:
903 goto done;
904 }
905 ret = 0;
906 if (mt == ID_REQUEST) {
907 new_tei_req(mgr, &skb->data[4]);
908 goto done;
909 }
910 list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
911 tei_ph_data_ind(l2->tm, mt, &skb->data[4], skb->len - 4);
912 }
913 done:
914 return ret;
915 }
916
917 int
918 l2_tei(struct layer2 *l2, u_int cmd, u_long arg)
919 {
920 struct teimgr *tm = l2->tm;
921
922 if (test_bit(FLG_FIXED_TEI, &l2->flag))
923 return 0;
924 if (*debug & DEBUG_L2_TEI)
925 printk(KERN_DEBUG "%s: cmd(%x)\n", __func__, cmd);
926 switch (cmd) {
927 case MDL_ASSIGN_IND:
928 mISDN_FsmEvent(&tm->tei_m, EV_IDREQ, NULL);
929 break;
930 case MDL_ERROR_IND:
931 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
932 mISDN_FsmEvent(&tm->tei_m, EV_CHKREQ, &l2->tei);
933 if (test_bit(MGR_OPT_USER, &tm->mgr->options))
934 mISDN_FsmEvent(&tm->tei_m, EV_VERIFY, NULL);
935 break;
936 case MDL_STATUS_UP_IND:
937 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
938 mISDN_FsmEvent(&tm->mgr->deact, EV_ACTIVATE, NULL);
939 break;
940 case MDL_STATUS_DOWN_IND:
941 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
942 mISDN_FsmEvent(&tm->mgr->deact, EV_DEACTIVATE, NULL);
943 break;
944 case MDL_STATUS_UI_IND:
945 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
946 mISDN_FsmEvent(&tm->mgr->deact, EV_UI, NULL);
947 break;
948 }
949 return 0;
950 }
951
952 void
953 TEIrelease(struct layer2 *l2)
954 {
955 struct teimgr *tm = l2->tm;
956 u_long flags;
957
958 mISDN_FsmDelTimer(&tm->timer, 1);
959 write_lock_irqsave(&tm->mgr->lock, flags);
960 list_del(&l2->list);
961 write_unlock_irqrestore(&tm->mgr->lock, flags);
962 l2->tm = NULL;
963 kfree(tm);
964 }
965
966 static int
967 create_teimgr(struct manager *mgr, struct channel_req *crq)
968 {
969 struct layer2 *l2;
970 u_long opt = 0;
971 u_long flags;
972 int id;
973
974 if (*debug & DEBUG_L2_TEI)
975 printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n",
976 __func__, dev_name(&mgr->ch.st->dev->dev),
977 crq->protocol, crq->adr.dev, crq->adr.channel,
978 crq->adr.sapi, crq->adr.tei);
979 if (crq->adr.tei > GROUP_TEI)
980 return -EINVAL;
981 if (crq->adr.tei < 64)
982 test_and_set_bit(OPTION_L2_FIXEDTEI, &opt);
983 if (crq->adr.tei == 0)
984 test_and_set_bit(OPTION_L2_PTP, &opt);
985 if (test_bit(MGR_OPT_NETWORK, &mgr->options)) {
986 if (crq->protocol == ISDN_P_LAPD_TE)
987 return -EPROTONOSUPPORT;
988 if ((crq->adr.tei != 0) && (crq->adr.tei != 127))
989 return -EINVAL;
990 if (mgr->up) {
991 printk(KERN_WARNING
992 "%s: only one network manager is allowed\n",
993 __func__);
994 return -EBUSY;
995 }
996 } else if (test_bit(MGR_OPT_USER, &mgr->options)) {
997 if (crq->protocol == ISDN_P_LAPD_NT)
998 return -EPROTONOSUPPORT;
999 if ((crq->adr.tei >= 64) && (crq->adr.tei < GROUP_TEI))
1000 return -EINVAL; /* dyn tei */
1001 } else {
1002 if (crq->protocol == ISDN_P_LAPD_NT)
1003 test_and_set_bit(MGR_OPT_NETWORK, &mgr->options);
1004 if (crq->protocol == ISDN_P_LAPD_TE)
1005 test_and_set_bit(MGR_OPT_USER, &mgr->options);
1006 }
1007 if (mgr->ch.st->dev->Dprotocols
1008 & ((1 << ISDN_P_TE_E1) | (1 << ISDN_P_NT_E1)))
1009 test_and_set_bit(OPTION_L2_PMX, &opt);
1010 if ((crq->protocol == ISDN_P_LAPD_NT) && (crq->adr.tei == 127)) {
1011 mgr->up = crq->ch;
1012 id = DL_INFO_L2_CONNECT;
1013 teiup_create(mgr, DL_INFORMATION_IND, sizeof(id), &id);
1014 crq->ch = NULL;
1015 if (!list_empty(&mgr->layer2)) {
1016 read_lock_irqsave(&mgr->lock, flags);
1017 list_for_each_entry(l2, &mgr->layer2, list) {
1018 l2->up = mgr->up;
1019 l2->ch.ctrl(&l2->ch, OPEN_CHANNEL, NULL);
1020 }
1021 read_unlock_irqrestore(&mgr->lock, flags);
1022 }
1023 return 0;
1024 }
1025 l2 = create_l2(crq->ch, crq->protocol, opt,
1026 crq->adr.tei, crq->adr.sapi);
1027 if (!l2)
1028 return -ENOMEM;
1029 l2->tm = kzalloc(sizeof(struct teimgr), GFP_KERNEL);
1030 if (!l2->tm) {
1031 kfree(l2);
1032 printk(KERN_ERR "kmalloc teimgr failed\n");
1033 return -ENOMEM;
1034 }
1035 l2->tm->mgr = mgr;
1036 l2->tm->l2 = l2;
1037 l2->tm->tei_m.debug = *debug & DEBUG_L2_TEIFSM;
1038 l2->tm->tei_m.userdata = l2->tm;
1039 l2->tm->tei_m.printdebug = tei_debug;
1040 if (crq->protocol == ISDN_P_LAPD_TE) {
1041 l2->tm->tei_m.fsm = &teifsmu;
1042 l2->tm->tei_m.state = ST_TEI_NOP;
1043 l2->tm->tval = 1000; /* T201 1 sec */
1044 } else {
1045 l2->tm->tei_m.fsm = &teifsmn;
1046 l2->tm->tei_m.state = ST_TEI_NOP;
1047 l2->tm->tval = 2000; /* T202 2 sec */
1048 }
1049 mISDN_FsmInitTimer(&l2->tm->tei_m, &l2->tm->timer);
1050 write_lock_irqsave(&mgr->lock, flags);
1051 id = get_free_id(mgr);
1052 list_add_tail(&l2->list, &mgr->layer2);
1053 write_unlock_irqrestore(&mgr->lock, flags);
1054 if (id < 0) {
1055 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
1056 } else {
1057 l2->ch.nr = id;
1058 l2->up->nr = id;
1059 crq->ch = &l2->ch;
1060 id = 0;
1061 }
1062 return id;
1063 }
1064
1065 static int
1066 mgr_send(struct mISDNchannel *ch, struct sk_buff *skb)
1067 {
1068 struct manager *mgr;
1069 struct mISDNhead *hh = mISDN_HEAD_P(skb);
1070 int ret = -EINVAL;
1071
1072 mgr = container_of(ch, struct manager, ch);
1073 if (*debug & DEBUG_L2_RECV)
1074 printk(KERN_DEBUG "%s: prim(%x) id(%x)\n",
1075 __func__, hh->prim, hh->id);
1076 switch (hh->prim) {
1077 case PH_DATA_IND:
1078 mISDN_FsmEvent(&mgr->deact, EV_UI, NULL);
1079 ret = ph_data_ind(mgr, skb);
1080 break;
1081 case PH_DATA_CNF:
1082 do_ack(mgr, hh->id);
1083 ret = 0;
1084 break;
1085 case PH_ACTIVATE_IND:
1086 test_and_set_bit(MGR_PH_ACTIVE, &mgr->options);
1087 mISDN_FsmEvent(&mgr->deact, EV_ACTIVATE_IND, NULL);
1088 do_send(mgr);
1089 ret = 0;
1090 break;
1091 case PH_DEACTIVATE_IND:
1092 test_and_clear_bit(MGR_PH_ACTIVE, &mgr->options);
1093 mISDN_FsmEvent(&mgr->deact, EV_DEACTIVATE_IND, NULL);
1094 ret = 0;
1095 break;
1096 case DL_UNITDATA_REQ:
1097 return dl_unit_data(mgr, skb);
1098 }
1099 if (!ret)
1100 dev_kfree_skb(skb);
1101 return ret;
1102 }
1103
1104 static int
1105 free_teimanager(struct manager *mgr)
1106 {
1107 struct layer2 *l2, *nl2;
1108
1109 test_and_clear_bit(OPTION_L1_HOLD, &mgr->options);
1110 if (test_bit(MGR_OPT_NETWORK, &mgr->options)) {
1111 /* not locked lock is taken in release tei */
1112 mgr->up = NULL;
1113 if (test_bit(OPTION_L2_CLEANUP, &mgr->options)) {
1114 list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
1115 put_tei_msg(mgr, ID_REMOVE, 0, l2->tei);
1116 mutex_lock(&mgr->ch.st->lmutex);
1117 list_del(&l2->ch.list);
1118 mutex_unlock(&mgr->ch.st->lmutex);
1119 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
1120 }
1121 test_and_clear_bit(MGR_OPT_NETWORK, &mgr->options);
1122 } else {
1123 list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
1124 l2->up = NULL;
1125 }
1126 }
1127 }
1128 if (test_bit(MGR_OPT_USER, &mgr->options)) {
1129 if (list_empty(&mgr->layer2))
1130 test_and_clear_bit(MGR_OPT_USER, &mgr->options);
1131 }
1132 mgr->ch.st->dev->D.ctrl(&mgr->ch.st->dev->D, CLOSE_CHANNEL, NULL);
1133 return 0;
1134 }
1135
1136 static int
1137 ctrl_teimanager(struct manager *mgr, void *arg)
1138 {
1139 /* currently we only have one option */
1140 int *val = (int *)arg;
1141 int ret = 0;
1142
1143 switch (val[0]) {
1144 case IMCLEAR_L2:
1145 if (val[1])
1146 test_and_set_bit(OPTION_L2_CLEANUP, &mgr->options);
1147 else
1148 test_and_clear_bit(OPTION_L2_CLEANUP, &mgr->options);
1149 break;
1150 case IMHOLD_L1:
1151 if (val[1])
1152 test_and_set_bit(OPTION_L1_HOLD, &mgr->options);
1153 else
1154 test_and_clear_bit(OPTION_L1_HOLD, &mgr->options);
1155 break;
1156 default:
1157 ret = -EINVAL;
1158 }
1159 return ret;
1160 }
1161
1162 /* This function does create a L2 for fixed TEI in NT Mode */
1163 static int
1164 check_data(struct manager *mgr, struct sk_buff *skb)
1165 {
1166 struct mISDNhead *hh = mISDN_HEAD_P(skb);
1167 int ret, tei, sapi;
1168 struct layer2 *l2;
1169
1170 if (*debug & DEBUG_L2_CTRL)
1171 printk(KERN_DEBUG "%s: prim(%x) id(%x)\n",
1172 __func__, hh->prim, hh->id);
1173 if (test_bit(MGR_OPT_USER, &mgr->options))
1174 return -ENOTCONN;
1175 if (hh->prim != PH_DATA_IND)
1176 return -ENOTCONN;
1177 if (skb->len != 3)
1178 return -ENOTCONN;
1179 if (skb->data[0] & 3) /* EA0 and CR must be 0 */
1180 return -EINVAL;
1181 sapi = skb->data[0] >> 2;
1182 if (!(skb->data[1] & 1)) /* invalid EA1 */
1183 return -EINVAL;
1184 tei = skb->data[1] >> 1;
1185 if (tei > 63) /* not a fixed tei */
1186 return -ENOTCONN;
1187 if ((skb->data[2] & ~0x10) != SABME)
1188 return -ENOTCONN;
1189 /* We got a SABME for a fixed TEI */
1190 if (*debug & DEBUG_L2_CTRL)
1191 printk(KERN_DEBUG "%s: SABME sapi(%d) tei(%d)\n",
1192 __func__, sapi, tei);
1193 l2 = create_new_tei(mgr, tei, sapi);
1194 if (!l2) {
1195 if (*debug & DEBUG_L2_CTRL)
1196 printk(KERN_DEBUG "%s: failed to create new tei\n",
1197 __func__);
1198 return -ENOMEM;
1199 }
1200 ret = l2->ch.send(&l2->ch, skb);
1201 return ret;
1202 }
1203
1204 void
1205 delete_teimanager(struct mISDNchannel *ch)
1206 {
1207 struct manager *mgr;
1208 struct layer2 *l2, *nl2;
1209
1210 mgr = container_of(ch, struct manager, ch);
1211 /* not locked lock is taken in release tei */
1212 list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
1213 mutex_lock(&mgr->ch.st->lmutex);
1214 list_del(&l2->ch.list);
1215 mutex_unlock(&mgr->ch.st->lmutex);
1216 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
1217 }
1218 list_del(&mgr->ch.list);
1219 list_del(&mgr->bcast.list);
1220 skb_queue_purge(&mgr->sendq);
1221 kfree(mgr);
1222 }
1223
1224 static int
1225 mgr_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
1226 {
1227 struct manager *mgr;
1228 int ret = -EINVAL;
1229
1230 mgr = container_of(ch, struct manager, ch);
1231 if (*debug & DEBUG_L2_CTRL)
1232 printk(KERN_DEBUG "%s(%x, %p)\n", __func__, cmd, arg);
1233 switch (cmd) {
1234 case OPEN_CHANNEL:
1235 ret = create_teimgr(mgr, arg);
1236 break;
1237 case CLOSE_CHANNEL:
1238 ret = free_teimanager(mgr);
1239 break;
1240 case CONTROL_CHANNEL:
1241 ret = ctrl_teimanager(mgr, arg);
1242 break;
1243 case CHECK_DATA:
1244 ret = check_data(mgr, arg);
1245 break;
1246 }
1247 return ret;
1248 }
1249
1250 static int
1251 mgr_bcast(struct mISDNchannel *ch, struct sk_buff *skb)
1252 {
1253 struct manager *mgr = container_of(ch, struct manager, bcast);
1254 struct mISDNhead *hh = mISDN_HEAD_P(skb);
1255 struct sk_buff *cskb = NULL;
1256 struct layer2 *l2;
1257 u_long flags;
1258 int ret;
1259
1260 read_lock_irqsave(&mgr->lock, flags);
1261 list_for_each_entry(l2, &mgr->layer2, list) {
1262 if ((hh->id & MISDN_ID_SAPI_MASK) ==
1263 (l2->ch.addr & MISDN_ID_SAPI_MASK)) {
1264 if (list_is_last(&l2->list, &mgr->layer2)) {
1265 cskb = skb;
1266 skb = NULL;
1267 } else {
1268 if (!cskb)
1269 cskb = skb_copy(skb, GFP_KERNEL);
1270 }
1271 if (cskb) {
1272 ret = l2->ch.send(&l2->ch, cskb);
1273 if (ret) {
1274 if (*debug & DEBUG_SEND_ERR)
1275 printk(KERN_DEBUG
1276 "%s ch%d prim(%x) addr(%x)"
1277 " err %d\n",
1278 __func__, l2->ch.nr,
1279 hh->prim, l2->ch.addr, ret);
1280 } else
1281 cskb = NULL;
1282 } else {
1283 printk(KERN_WARNING "%s ch%d addr %x no mem\n",
1284 __func__, ch->nr, ch->addr);
1285 goto out;
1286 }
1287 }
1288 }
1289 out:
1290 read_unlock_irqrestore(&mgr->lock, flags);
1291 if (cskb)
1292 dev_kfree_skb(cskb);
1293 if (skb)
1294 dev_kfree_skb(skb);
1295 return 0;
1296 }
1297
1298 static int
1299 mgr_bcast_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
1300 {
1301
1302 return -EINVAL;
1303 }
1304
1305 int
1306 create_teimanager(struct mISDNdevice *dev)
1307 {
1308 struct manager *mgr;
1309
1310 mgr = kzalloc(sizeof(struct manager), GFP_KERNEL);
1311 if (!mgr)
1312 return -ENOMEM;
1313 INIT_LIST_HEAD(&mgr->layer2);
1314 rwlock_init(&mgr->lock);
1315 skb_queue_head_init(&mgr->sendq);
1316 mgr->nextid = 1;
1317 mgr->lastid = MISDN_ID_NONE;
1318 mgr->ch.send = mgr_send;
1319 mgr->ch.ctrl = mgr_ctrl;
1320 mgr->ch.st = dev->D.st;
1321 set_channel_address(&mgr->ch, TEI_SAPI, GROUP_TEI);
1322 add_layer2(&mgr->ch, dev->D.st);
1323 mgr->bcast.send = mgr_bcast;
1324 mgr->bcast.ctrl = mgr_bcast_ctrl;
1325 mgr->bcast.st = dev->D.st;
1326 set_channel_address(&mgr->bcast, 0, GROUP_TEI);
1327 add_layer2(&mgr->bcast, dev->D.st);
1328 mgr->deact.debug = *debug & DEBUG_MANAGER;
1329 mgr->deact.userdata = mgr;
1330 mgr->deact.printdebug = da_debug;
1331 mgr->deact.fsm = &deactfsm;
1332 mgr->deact.state = ST_L1_DEACT;
1333 mISDN_FsmInitTimer(&mgr->deact, &mgr->datimer);
1334 dev->teimgr = &mgr->ch;
1335 return 0;
1336 }
1337
1338 int TEIInit(u_int *deb)
1339 {
1340 debug = deb;
1341 teifsmu.state_count = TEI_STATE_COUNT;
1342 teifsmu.event_count = TEI_EVENT_COUNT;
1343 teifsmu.strEvent = strTeiEvent;
1344 teifsmu.strState = strTeiState;
1345 mISDN_FsmNew(&teifsmu, TeiFnListUser, ARRAY_SIZE(TeiFnListUser));
1346 teifsmn.state_count = TEI_STATE_COUNT;
1347 teifsmn.event_count = TEI_EVENT_COUNT;
1348 teifsmn.strEvent = strTeiEvent;
1349 teifsmn.strState = strTeiState;
1350 mISDN_FsmNew(&teifsmn, TeiFnListNet, ARRAY_SIZE(TeiFnListNet));
1351 deactfsm.state_count = DEACT_STATE_COUNT;
1352 deactfsm.event_count = DEACT_EVENT_COUNT;
1353 deactfsm.strEvent = strDeactEvent;
1354 deactfsm.strState = strDeactState;
1355 mISDN_FsmNew(&deactfsm, DeactFnList, ARRAY_SIZE(DeactFnList));
1356 return 0;
1357 }
1358
1359 void TEIFree(void)
1360 {
1361 mISDN_FsmFree(&teifsmu);
1362 mISDN_FsmFree(&teifsmn);
1363 mISDN_FsmFree(&deactfsm);
1364 }
Linux for Ginger Game Console