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 */
cfm_init(struct s_smc * smc)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 */
selection_criteria(struct s_smc * smc,struct s_phy * phy)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 
all_selection_criteria(struct s_smc * smc)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 
cem_priv_state(struct s_smc * smc,int event)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 */
cfm(struct s_smc * smc,int event)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*/
cfm_fsm(struct s_smc * smc,int cmd)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  */
cfm_get_mac_input(struct s_smc * smc)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  */
cfm_get_mac_output(struct s_smc * smc)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 
cem_build_path(struct s_smc * smc,char * to,int path_index)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 }
628