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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[linux-2.6/verdex.git] / drivers / net / skfp / cfm.c
blob5310d39b5737492da4aed57fc29f563750810d1e
1 /******************************************************************************
2 *
3 * (C)Copyright 1998,1999 SysKonnect,
4 * a business unit of Schneider & Koch & Co. Datensysteme GmbH.
5 *
6 * See the file "skfddi.c" for further information.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * The information in this file is provided "AS IS" without warranty.
14 *
15 ******************************************************************************/
16
17 /*
18 SMT CFM
19 Configuration Management
20 DAS with single MAC
21 */
22
23 /*
24 * Hardware independent state machine implemantation
25 * The following external SMT functions are referenced :
26 *
27 * queue_event()
28 *
29 * The following external HW dependent functions are referenced :
30 * config_mux()
31 *
32 * The following HW dependent events are required :
33 * NONE
34 */
35
36 #include "h/types.h"
37 #include "h/fddi.h"
38 #include "h/smc.h"
39
40 #define KERNEL
41 #include "h/smtstate.h"
42
43 #ifndef lint
44 static const char ID_sccs[] = "@(#)cfm.c 2.18 98/10/06 (C) SK " ;
45 #endif
46
47 /*
48 * FSM Macros
49 */
50 #define AFLAG 0x10
51 #define GO_STATE(x) (smc->mib.fddiSMTCF_State = (x)|AFLAG)
52 #define ACTIONS_DONE() (smc->mib.fddiSMTCF_State &= ~AFLAG)
53 #define ACTIONS(x) (x|AFLAG)
54
55 #ifdef DEBUG
56 /*
57 * symbolic state names
58 */
59 static const char * const cfm_states[] = {
60 "SC0_ISOLATED","CF1","CF2","CF3","CF4",
61 "SC1_WRAP_A","SC2_WRAP_B","SC5_TRHU_B","SC7_WRAP_S",
62 "SC9_C_WRAP_A","SC10_C_WRAP_B","SC11_C_WRAP_S","SC4_THRU_A"
63 } ;
64
65 /*
66 * symbolic event names
67 */
68 static const char * const cfm_events[] = {
69 "NONE","CF_LOOP_A","CF_LOOP_B","CF_JOIN_A","CF_JOIN_B"
70 } ;
71 #endif
72
73 /*
74 * map from state to downstream port type
75 */
76 static const unsigned char cf_to_ptype[] = {
77 TNONE,TNONE,TNONE,TNONE,TNONE,
78 TNONE,TB,TB,TS,
79 TA,TB,TS,TB
80 } ;
81
82 /*
83 * CEM port states
84 */
85 #define CEM_PST_DOWN 0
86 #define CEM_PST_UP 1
87 #define CEM_PST_HOLD 2
88 /* define portstate array only for A and B port */
89 /* Do this within the smc structure (use in multiple cards) */
90
91 /*
92 * all Globals are defined in smc.h
93 * struct s_cfm
94 */
95
96 /*
97 * function declarations
98 */
99 static void cfm_fsm(struct s_smc *smc, int cmd);
100
101 /*
102 init CFM state machine
103 clear all CFM vars and flags
104 */
105 void cfm_init(struct s_smc *smc)
106 {
107 smc->mib.fddiSMTCF_State = ACTIONS(SC0_ISOLATED) ;
108 smc->r.rm_join = 0 ;
109 smc->r.rm_loop = 0 ;
110 smc->y[PA].scrub = 0 ;
111 smc->y[PB].scrub = 0 ;
112 smc->y[PA].cem_pst = CEM_PST_DOWN ;
113 smc->y[PB].cem_pst = CEM_PST_DOWN ;
114 }
115
116 /* Some terms conditions used by the selection criteria */
117 #define THRU_ENABLED(smc) (smc->y[PA].pc_mode != PM_TREE && \
118 smc->y[PB].pc_mode != PM_TREE)
119 /* Selection criteria for the ports */
120 static void selection_criteria (struct s_smc *smc, struct s_phy *phy)
121 {
122
123 switch (phy->mib->fddiPORTMy_Type) {
124 case TA:
125 if ( !THRU_ENABLED(smc) && smc->y[PB].cf_join ) {
126 phy->wc_flag = TRUE ;
127 } else {
128 phy->wc_flag = FALSE ;
129 }
130
131 break;
132 case TB:
133 /* take precedence over PA */
134 phy->wc_flag = FALSE ;
135 break;
136 case TS:
137 phy->wc_flag = FALSE ;
138 break;
139 case TM:
140 phy->wc_flag = FALSE ;
141 break;
142 }
143
144 }
145
146 void all_selection_criteria(struct s_smc *smc)
147 {
148 struct s_phy *phy ;
149 int p ;
150
151 for ( p = 0,phy = smc->y ; p < NUMPHYS; p++, phy++ ) {
152 /* Do the selection criteria */
153 selection_criteria (smc,phy);
154 }
155 }
156
157 static void cem_priv_state(struct s_smc *smc, int event)
158 /* State machine for private PORT states: used to optimize dual homing */
159 {
160 int np; /* Number of the port */
161 int i;
162
163 /* Do this only in a DAS */
164 if (smc->s.sas != SMT_DAS )
165 return ;
166
167 np = event - CF_JOIN;
168
169 if (np != PA && np != PB) {
170 return ;
171 }
172 /* Change the port state according to the event (portnumber) */
173 if (smc->y[np].cf_join) {
174 smc->y[np].cem_pst = CEM_PST_UP ;
175 } else if (!smc->y[np].wc_flag) {
176 /* set the port to done only if it is not withheld */
177 smc->y[np].cem_pst = CEM_PST_DOWN ;
178 }
179
180 /* Don't set an hold port to down */
181
182 /* Check all ports of restart conditions */
183 for (i = 0 ; i < 2 ; i ++ ) {
184 /* Check all port for PORT is on hold and no withhold is done */
185 if ( smc->y[i].cem_pst == CEM_PST_HOLD && !smc->y[i].wc_flag ) {
186 smc->y[i].cem_pst = CEM_PST_DOWN;
187 queue_event(smc,(int)(EVENT_PCM+i),PC_START) ;
188 }
189 if ( smc->y[i].cem_pst == CEM_PST_UP && smc->y[i].wc_flag ) {
190 smc->y[i].cem_pst = CEM_PST_HOLD;
191 queue_event(smc,(int)(EVENT_PCM+i),PC_START) ;
192 }
193 if ( smc->y[i].cem_pst == CEM_PST_DOWN && smc->y[i].wc_flag ) {
194 /*
195 * The port must be restarted when the wc_flag
196 * will be reset. So set the port on hold.
197 */
198 smc->y[i].cem_pst = CEM_PST_HOLD;
199 }
200 }
201 return ;
202 }
203
204 /*
205 CFM state machine
206 called by dispatcher
207
208 do
209 display state change
210 process event
211 until SM is stable
212 */
213 void cfm(struct s_smc *smc, int event)
214 {
215 int state ; /* remember last state */
216 int cond ;
217 int oldstate ;
218
219 /* We will do the following: */
220 /* - compute the variable WC_Flag for every port (This is where */
221 /* we can extend the requested path checking !!) */
222 /* - do the old (SMT 6.2 like) state machine */
223 /* - do the resulting station states */
224
225 all_selection_criteria (smc);
226
227 /* We will check now whether a state transition is allowed or not */
228 /* - change the portstates */
229 cem_priv_state (smc, event);
230
231 oldstate = smc->mib.fddiSMTCF_State ;
232 do {
233 DB_CFM("CFM : state %s%s",
234 (smc->mib.fddiSMTCF_State & AFLAG) ? "ACTIONS " : "",
235 cfm_states[smc->mib.fddiSMTCF_State & ~AFLAG]) ;
236 DB_CFM(" event %s\n",cfm_events[event],0) ;
237 state = smc->mib.fddiSMTCF_State ;
238 cfm_fsm(smc,event) ;
239 event = 0 ;
240 } while (state != smc->mib.fddiSMTCF_State) ;
241
242 #ifndef SLIM_SMT
243 /*
244 * check peer wrap condition
245 */
246 cond = FALSE ;
247 if ( (smc->mib.fddiSMTCF_State == SC9_C_WRAP_A &&
248 smc->y[PA].pc_mode == PM_PEER) ||
249 (smc->mib.fddiSMTCF_State == SC10_C_WRAP_B &&
250 smc->y[PB].pc_mode == PM_PEER) ||
251 (smc->mib.fddiSMTCF_State == SC11_C_WRAP_S &&
252 smc->y[PS].pc_mode == PM_PEER &&
253 smc->y[PS].mib->fddiPORTNeighborType != TS ) ) {
254 cond = TRUE ;
255 }
256 if (cond != smc->mib.fddiSMTPeerWrapFlag)
257 smt_srf_event(smc,SMT_COND_SMT_PEER_WRAP,0,cond) ;
258
259 #if 0
260 /*
261 * Don't send ever MAC_PATH_CHANGE events. Our MAC is hard-wired
262 * to the primary path.
263 */
264 /*
265 * path change
266 */
267 if (smc->mib.fddiSMTCF_State != oldstate) {
268 smt_srf_event(smc,SMT_EVENT_MAC_PATH_CHANGE,INDEX_MAC,0) ;
269 }
270 #endif
271 #endif /* no SLIM_SMT */
272
273 /*
274 * set MAC port type
275 */
276 smc->mib.m[MAC0].fddiMACDownstreamPORTType =
277 cf_to_ptype[smc->mib.fddiSMTCF_State] ;
278 cfm_state_change(smc,(int)smc->mib.fddiSMTCF_State) ;
279 }
280
281 /*
282 process CFM event
283 */
284 /*ARGSUSED1*/
285 static void cfm_fsm(struct s_smc *smc, int cmd)
286 {
287 switch(smc->mib.fddiSMTCF_State) {
288 case ACTIONS(SC0_ISOLATED) :
289 smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_ISOLATED ;
290 smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_ISOLATED ;
291 smc->mib.p[PA].fddiPORTMACPlacement = 0 ;
292 smc->mib.p[PB].fddiPORTMACPlacement = 0 ;
293 smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_SEPA ;
294 config_mux(smc,MUX_ISOLATE) ; /* configure PHY Mux */
295 smc->r.rm_loop = FALSE ;
296 smc->r.rm_join = FALSE ;
297 queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
298 /* Don't do the WC-Flag changing here */
299 ACTIONS_DONE() ;
300 DB_CFMN(1,"CFM : %s\n",cfm_states[smc->mib.fddiSMTCF_State],0) ;
301 break;
302 case SC0_ISOLATED :
303 /*SC07*/
304 /*SAS port can be PA or PB ! */
305 if (smc->s.sas && (smc->y[PA].cf_join || smc->y[PA].cf_loop ||
306 smc->y[PB].cf_join || smc->y[PB].cf_loop)) {
307 GO_STATE(SC11_C_WRAP_S) ;
308 break ;
309 }
310 /*SC01*/
311 if ((smc->y[PA].cem_pst == CEM_PST_UP && smc->y[PA].cf_join &&
312 !smc->y[PA].wc_flag) || smc->y[PA].cf_loop) {
313 GO_STATE(SC9_C_WRAP_A) ;
314 break ;
315 }
316 /*SC02*/
317 if ((smc->y[PB].cem_pst == CEM_PST_UP && smc->y[PB].cf_join &&
318 !smc->y[PB].wc_flag) || smc->y[PB].cf_loop) {
319 GO_STATE(SC10_C_WRAP_B) ;
320 break ;
321 }
322 break ;
323 case ACTIONS(SC9_C_WRAP_A) :
324 smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_CONCATENATED ;
325 smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_ISOLATED ;
326 smc->mib.p[PA].fddiPORTMACPlacement = INDEX_MAC ;
327 smc->mib.p[PB].fddiPORTMACPlacement = 0 ;
328 smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_CON ;
329 config_mux(smc,MUX_WRAPA) ; /* configure PHY mux */
330 if (smc->y[PA].cf_loop) {
331 smc->r.rm_join = FALSE ;
332 smc->r.rm_loop = TRUE ;
333 queue_event(smc,EVENT_RMT,RM_LOOP) ;/* signal RMT */
334 }
335 if (smc->y[PA].cf_join) {
336 smc->r.rm_loop = FALSE ;
337 smc->r.rm_join = TRUE ;
338 queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
339 }
340 ACTIONS_DONE() ;
341 DB_CFMN(1,"CFM : %s\n",cfm_states[smc->mib.fddiSMTCF_State],0) ;
342 break ;
343 case SC9_C_WRAP_A :
344 /*SC10*/
345 if ( (smc->y[PA].wc_flag || !smc->y[PA].cf_join) &&
346 !smc->y[PA].cf_loop ) {
347 GO_STATE(SC0_ISOLATED) ;
348 break ;
349 }
350 /*SC12*/
351 else if ( (smc->y[PB].cf_loop && smc->y[PA].cf_join &&
352 smc->y[PA].cem_pst == CEM_PST_UP) ||
353 ((smc->y[PB].cf_loop ||
354 (smc->y[PB].cf_join &&
355 smc->y[PB].cem_pst == CEM_PST_UP)) &&
356 (smc->y[PA].pc_mode == PM_TREE ||
357 smc->y[PB].pc_mode == PM_TREE))) {
358 smc->y[PA].scrub = TRUE ;
359 GO_STATE(SC10_C_WRAP_B) ;
360 break ;
361 }
362 /*SC14*/
363 else if (!smc->s.attach_s &&
364 smc->y[PA].cf_join &&
365 smc->y[PA].cem_pst == CEM_PST_UP &&
366 smc->y[PA].pc_mode == PM_PEER && smc->y[PB].cf_join &&
367 smc->y[PB].cem_pst == CEM_PST_UP &&
368 smc->y[PB].pc_mode == PM_PEER) {
369 smc->y[PA].scrub = TRUE ;
370 smc->y[PB].scrub = TRUE ;
371 GO_STATE(SC4_THRU_A) ;
372 break ;
373 }
374 /*SC15*/
375 else if ( smc->s.attach_s &&
376 smc->y[PA].cf_join &&
377 smc->y[PA].cem_pst == CEM_PST_UP &&
378 smc->y[PA].pc_mode == PM_PEER &&
379 smc->y[PB].cf_join &&
380 smc->y[PB].cem_pst == CEM_PST_UP &&
381 smc->y[PB].pc_mode == PM_PEER) {
382 smc->y[PA].scrub = TRUE ;
383 smc->y[PB].scrub = TRUE ;
384 GO_STATE(SC5_THRU_B) ;
385 break ;
386 }
387 break ;
388 case ACTIONS(SC10_C_WRAP_B) :
389 smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_ISOLATED ;
390 smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_CONCATENATED ;
391 smc->mib.p[PA].fddiPORTMACPlacement = 0 ;
392 smc->mib.p[PB].fddiPORTMACPlacement = INDEX_MAC ;
393 smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_CON ;
394 config_mux(smc,MUX_WRAPB) ; /* configure PHY mux */
395 if (smc->y[PB].cf_loop) {
396 smc->r.rm_join = FALSE ;
397 smc->r.rm_loop = TRUE ;
398 queue_event(smc,EVENT_RMT,RM_LOOP) ;/* signal RMT */
399 }
400 if (smc->y[PB].cf_join) {
401 smc->r.rm_loop = FALSE ;
402 smc->r.rm_join = TRUE ;
403 queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
404 }
405 ACTIONS_DONE() ;
406 DB_CFMN(1,"CFM : %s\n",cfm_states[smc->mib.fddiSMTCF_State],0) ;
407 break ;
408 case SC10_C_WRAP_B :
409 /*SC20*/
410 if ( !smc->y[PB].cf_join && !smc->y[PB].cf_loop ) {
411 GO_STATE(SC0_ISOLATED) ;
412 break ;
413 }
414 /*SC21*/
415 else if ( smc->y[PA].cf_loop && smc->y[PA].pc_mode == PM_PEER &&
416 smc->y[PB].cf_join && smc->y[PB].pc_mode == PM_PEER) {
417 smc->y[PB].scrub = TRUE ;
418 GO_STATE(SC9_C_WRAP_A) ;
419 break ;
420 }
421 /*SC24*/
422 else if (!smc->s.attach_s &&
423 smc->y[PA].cf_join && smc->y[PA].pc_mode == PM_PEER &&
424 smc->y[PB].cf_join && smc->y[PB].pc_mode == PM_PEER) {
425 smc->y[PA].scrub = TRUE ;
426 smc->y[PB].scrub = TRUE ;
427 GO_STATE(SC4_THRU_A) ;
428 break ;
429 }
430 /*SC25*/
431 else if ( smc->s.attach_s &&
432 smc->y[PA].cf_join && smc->y[PA].pc_mode == PM_PEER &&
433 smc->y[PB].cf_join && smc->y[PB].pc_mode == PM_PEER) {
434 smc->y[PA].scrub = TRUE ;
435 smc->y[PB].scrub = TRUE ;
436 GO_STATE(SC5_THRU_B) ;
437 break ;
438 }
439 break ;
440 case ACTIONS(SC4_THRU_A) :
441 smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_THRU ;
442 smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_THRU ;
443 smc->mib.p[PA].fddiPORTMACPlacement = 0 ;
444 smc->mib.p[PB].fddiPORTMACPlacement = INDEX_MAC ;
445 smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_THRU ;
446 config_mux(smc,MUX_THRUA) ; /* configure PHY mux */
447 smc->r.rm_loop = FALSE ;
448 smc->r.rm_join = TRUE ;
449 queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
450 ACTIONS_DONE() ;
451 DB_CFMN(1,"CFM : %s\n",cfm_states[smc->mib.fddiSMTCF_State],0) ;
452 break ;
453 case SC4_THRU_A :
454 /*SC41*/
455 if (smc->y[PB].wc_flag || !smc->y[PB].cf_join) {
456 smc->y[PA].scrub = TRUE ;
457 GO_STATE(SC9_C_WRAP_A) ;
458 break ;
459 }
460 /*SC42*/
461 else if (!smc->y[PA].cf_join || smc->y[PA].wc_flag) {
462 smc->y[PB].scrub = TRUE ;
463 GO_STATE(SC10_C_WRAP_B) ;
464 break ;
465 }
466 /*SC45*/
467 else if (smc->s.attach_s) {
468 smc->y[PB].scrub = TRUE ;
469 GO_STATE(SC5_THRU_B) ;
470 break ;
471 }
472 break ;
473 case ACTIONS(SC5_THRU_B) :
474 smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_THRU ;
475 smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_THRU ;
476 smc->mib.p[PA].fddiPORTMACPlacement = INDEX_MAC ;
477 smc->mib.p[PB].fddiPORTMACPlacement = 0 ;
478 smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_THRU ;
479 config_mux(smc,MUX_THRUB) ; /* configure PHY mux */
480 smc->r.rm_loop = FALSE ;
481 smc->r.rm_join = TRUE ;
482 queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
483 ACTIONS_DONE() ;
484 DB_CFMN(1,"CFM : %s\n",cfm_states[smc->mib.fddiSMTCF_State],0) ;
485 break ;
486 case SC5_THRU_B :
487 /*SC51*/
488 if (!smc->y[PB].cf_join || smc->y[PB].wc_flag) {
489 smc->y[PA].scrub = TRUE ;
490 GO_STATE(SC9_C_WRAP_A) ;
491 break ;
492 }
493 /*SC52*/
494 else if (!smc->y[PA].cf_join || smc->y[PA].wc_flag) {
495 smc->y[PB].scrub = TRUE ;
496 GO_STATE(SC10_C_WRAP_B) ;
497 break ;
498 }
499 /*SC54*/
500 else if (!smc->s.attach_s) {
501 smc->y[PA].scrub = TRUE ;
502 GO_STATE(SC4_THRU_A) ;
503 break ;
504 }
505 break ;
506 case ACTIONS(SC11_C_WRAP_S) :
507 smc->mib.p[PS].fddiPORTCurrentPath = MIB_PATH_CONCATENATED ;
508 smc->mib.p[PS].fddiPORTMACPlacement = INDEX_MAC ;
509 smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_CON ;
510 config_mux(smc,MUX_WRAPS) ; /* configure PHY mux */
511 if (smc->y[PA].cf_loop || smc->y[PB].cf_loop) {
512 smc->r.rm_join = FALSE ;
513 smc->r.rm_loop = TRUE ;
514 queue_event(smc,EVENT_RMT,RM_LOOP) ;/* signal RMT */
515 }
516 if (smc->y[PA].cf_join || smc->y[PB].cf_join) {
517 smc->r.rm_loop = FALSE ;
518 smc->r.rm_join = TRUE ;
519 queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
520 }
521 ACTIONS_DONE() ;
522 DB_CFMN(1,"CFM : %s\n",cfm_states[smc->mib.fddiSMTCF_State],0) ;
523 break ;
524 case SC11_C_WRAP_S :
525 /*SC70*/
526 if ( !smc->y[PA].cf_join && !smc->y[PA].cf_loop &&
527 !smc->y[PB].cf_join && !smc->y[PB].cf_loop) {
528 GO_STATE(SC0_ISOLATED) ;
529 break ;
530 }
531 break ;
532 default:
533 SMT_PANIC(smc,SMT_E0106, SMT_E0106_MSG) ;
534 break;
535 }
536 }
537
538 /*
539 * get MAC's input Port
540 * return :
541 * PA or PB
542 */
543 int cfm_get_mac_input(struct s_smc *smc)
544 {
545 return((smc->mib.fddiSMTCF_State == SC10_C_WRAP_B ||
546 smc->mib.fddiSMTCF_State == SC5_THRU_B) ? PB : PA) ;
547 }
548
549 /*
550 * get MAC's output Port
551 * return :
552 * PA or PB
553 */
554 int cfm_get_mac_output(struct s_smc *smc)
555 {
556 return((smc->mib.fddiSMTCF_State == SC10_C_WRAP_B ||
557 smc->mib.fddiSMTCF_State == SC4_THRU_A) ? PB : PA) ;
558 }
559
560 static char path_iso[] = {
561 0,0, 0,RES_PORT, 0,PA + INDEX_PORT, 0,PATH_ISO,
562 0,0, 0,RES_MAC, 0,INDEX_MAC, 0,PATH_ISO,
563 0,0, 0,RES_PORT, 0,PB + INDEX_PORT, 0,PATH_ISO
564 } ;
565
566 static char path_wrap_a[] = {
567 0,0, 0,RES_PORT, 0,PA + INDEX_PORT, 0,PATH_PRIM,
568 0,0, 0,RES_MAC, 0,INDEX_MAC, 0,PATH_PRIM,
569 0,0, 0,RES_PORT, 0,PB + INDEX_PORT, 0,PATH_ISO
570 } ;
571
572 static char path_wrap_b[] = {
573 0,0, 0,RES_PORT, 0,PB + INDEX_PORT, 0,PATH_PRIM,
574 0,0, 0,RES_MAC, 0,INDEX_MAC, 0,PATH_PRIM,
575 0,0, 0,RES_PORT, 0,PA + INDEX_PORT, 0,PATH_ISO
576 } ;
577
578 static char path_thru[] = {
579 0,0, 0,RES_PORT, 0,PA + INDEX_PORT, 0,PATH_PRIM,
580 0,0, 0,RES_MAC, 0,INDEX_MAC, 0,PATH_PRIM,
581 0,0, 0,RES_PORT, 0,PB + INDEX_PORT, 0,PATH_PRIM
582 } ;
583
584 static char path_wrap_s[] = {
585 0,0, 0,RES_PORT, 0,PS + INDEX_PORT, 0,PATH_PRIM,
586 0,0, 0,RES_MAC, 0,INDEX_MAC, 0,PATH_PRIM,
587 } ;
588
589 static char path_iso_s[] = {
590 0,0, 0,RES_PORT, 0,PS + INDEX_PORT, 0,PATH_ISO,
591 0,0, 0,RES_MAC, 0,INDEX_MAC, 0,PATH_ISO,
592 } ;
593
594 int cem_build_path(struct s_smc *smc, char *to, int path_index)
595 {
596 char *path ;
597 int len ;
598
599 switch (smc->mib.fddiSMTCF_State) {
600 default :
601 case SC0_ISOLATED :
602 path = smc->s.sas ? path_iso_s : path_iso ;
603 len = smc->s.sas ? sizeof(path_iso_s) : sizeof(path_iso) ;
604 break ;
605 case SC9_C_WRAP_A :
606 path = path_wrap_a ;
607 len = sizeof(path_wrap_a) ;
608 break ;
609 case SC10_C_WRAP_B :
610 path = path_wrap_b ;
611 len = sizeof(path_wrap_b) ;
612 break ;
613 case SC4_THRU_A :
614 path = path_thru ;
615 len = sizeof(path_thru) ;
616 break ;
617 case SC11_C_WRAP_S :
618 path = path_wrap_s ;
619 len = sizeof(path_wrap_s) ;
620 break ;
621 }
622 memcpy(to,path,len) ;
623
624 LINT_USE(path_index);
625
626 return(len) ;
627 }
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