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