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WIP FPC-III support
[linux/fpc-iii.git] / drivers / net / fddi / skfp / cfm.c
blob4eea3408034be09695d0735fe09a2f0d7780ec68
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /******************************************************************************
3 *
4 * (C)Copyright 1998,1999 SysKonnect,
5 * a business unit of Schneider & Koch & Co. Datensysteme GmbH.
6 *
7 * See the file "skfddi.c" for further information.
8 *
9 * The information in this file is provided "AS IS" without warranty.
10 *
11 ******************************************************************************/
12
13 /*
14 SMT CFM
15 Configuration Management
16 DAS with single MAC
17 */
18
19 /*
20 * Hardware independent state machine implemantation
21 * The following external SMT functions are referenced :
22 *
23 * queue_event()
24 *
25 * The following external HW dependent functions are referenced :
26 * config_mux()
27 *
28 * The following HW dependent events are required :
29 * NONE
30 */
31
32 #include "h/types.h"
33 #include "h/fddi.h"
34 #include "h/smc.h"
35
36 #define KERNEL
37 #include "h/smtstate.h"
38
39 /*
40 * FSM Macros
41 */
42 #define AFLAG 0x10
43 #define GO_STATE(x) (smc->mib.fddiSMTCF_State = (x)|AFLAG)
44 #define ACTIONS_DONE() (smc->mib.fddiSMTCF_State &= ~AFLAG)
45 #define ACTIONS(x) (x|AFLAG)
46
47 /*
48 * symbolic state names
49 */
50 static const char * const cfm_states[] = {
51 "SC0_ISOLATED","CF1","CF2","CF3","CF4",
52 "SC1_WRAP_A","SC2_WRAP_B","SC5_TRHU_B","SC7_WRAP_S",
53 "SC9_C_WRAP_A","SC10_C_WRAP_B","SC11_C_WRAP_S","SC4_THRU_A"
54 } ;
55
56 /*
57 * symbolic event names
58 */
59 static const char * const cfm_events[] = {
60 "NONE","CF_LOOP_A","CF_LOOP_B","CF_JOIN_A","CF_JOIN_B"
61 } ;
62
63 /*
64 * map from state to downstream port type
65 */
66 static const unsigned char cf_to_ptype[] = {
67 TNONE,TNONE,TNONE,TNONE,TNONE,
68 TNONE,TB,TB,TS,
69 TA,TB,TS,TB
70 } ;
71
72 /*
73 * CEM port states
74 */
75 #define CEM_PST_DOWN 0
76 #define CEM_PST_UP 1
77 #define CEM_PST_HOLD 2
78 /* define portstate array only for A and B port */
79 /* Do this within the smc structure (use in multiple cards) */
80
81 /*
82 * all Globals are defined in smc.h
83 * struct s_cfm
84 */
85
86 /*
87 * function declarations
88 */
89 static void cfm_fsm(struct s_smc *smc, int cmd);
90
91 /*
92 init CFM state machine
93 clear all CFM vars and flags
94 */
95 void cfm_init(struct s_smc *smc)
96 {
97 smc->mib.fddiSMTCF_State = ACTIONS(SC0_ISOLATED) ;
98 smc->r.rm_join = 0 ;
99 smc->r.rm_loop = 0 ;
100 smc->y[PA].scrub = 0 ;
101 smc->y[PB].scrub = 0 ;
102 smc->y[PA].cem_pst = CEM_PST_DOWN ;
103 smc->y[PB].cem_pst = CEM_PST_DOWN ;
104 }
105
106 /* Some terms conditions used by the selection criteria */
107 #define THRU_ENABLED(smc) (smc->y[PA].pc_mode != PM_TREE && \
108 smc->y[PB].pc_mode != PM_TREE)
109 /* Selection criteria for the ports */
110 static void selection_criteria (struct s_smc *smc, struct s_phy *phy)
111 {
112
113 switch (phy->mib->fddiPORTMy_Type) {
114 case TA:
115 if ( !THRU_ENABLED(smc) && smc->y[PB].cf_join ) {
116 phy->wc_flag = TRUE ;
117 } else {
118 phy->wc_flag = FALSE ;
119 }
120
121 break;
122 case TB:
123 /* take precedence over PA */
124 phy->wc_flag = FALSE ;
125 break;
126 case TS:
127 phy->wc_flag = FALSE ;
128 break;
129 case TM:
130 phy->wc_flag = FALSE ;
131 break;
132 }
133
134 }
135
136 void all_selection_criteria(struct s_smc *smc)
137 {
138 struct s_phy *phy ;
139 int p ;
140
141 for ( p = 0,phy = smc->y ; p < NUMPHYS; p++, phy++ ) {
142 /* Do the selection criteria */
143 selection_criteria (smc,phy);
144 }
145 }
146
147 static void cem_priv_state(struct s_smc *smc, int event)
148 /* State machine for private PORT states: used to optimize dual homing */
149 {
150 int np; /* Number of the port */
151 int i;
152
153 /* Do this only in a DAS */
154 if (smc->s.sas != SMT_DAS )
155 return ;
156
157 np = event - CF_JOIN;
158
159 if (np != PA && np != PB) {
160 return ;
161 }
162 /* Change the port state according to the event (portnumber) */
163 if (smc->y[np].cf_join) {
164 smc->y[np].cem_pst = CEM_PST_UP ;
165 } else if (!smc->y[np].wc_flag) {
166 /* set the port to done only if it is not withheld */
167 smc->y[np].cem_pst = CEM_PST_DOWN ;
168 }
169
170 /* Don't set an hold port to down */
171
172 /* Check all ports of restart conditions */
173 for (i = 0 ; i < 2 ; i ++ ) {
174 /* Check all port for PORT is on hold and no withhold is done */
175 if ( smc->y[i].cem_pst == CEM_PST_HOLD && !smc->y[i].wc_flag ) {
176 smc->y[i].cem_pst = CEM_PST_DOWN;
177 queue_event(smc,(int)(EVENT_PCM+i),PC_START) ;
178 }
179 if ( smc->y[i].cem_pst == CEM_PST_UP && smc->y[i].wc_flag ) {
180 smc->y[i].cem_pst = CEM_PST_HOLD;
181 queue_event(smc,(int)(EVENT_PCM+i),PC_START) ;
182 }
183 if ( smc->y[i].cem_pst == CEM_PST_DOWN && smc->y[i].wc_flag ) {
184 /*
185 * The port must be restarted when the wc_flag
186 * will be reset. So set the port on hold.
187 */
188 smc->y[i].cem_pst = CEM_PST_HOLD;
189 }
190 }
191 return ;
192 }
193
194 /*
195 CFM state machine
196 called by dispatcher
197
198 do
199 display state change
200 process event
201 until SM is stable
202 */
203 void cfm(struct s_smc *smc, int event)
204 {
205 int state ; /* remember last state */
206 int cond ;
207
208 /* We will do the following: */
209 /* - compute the variable WC_Flag for every port (This is where */
210 /* we can extend the requested path checking !!) */
211 /* - do the old (SMT 6.2 like) state machine */
212 /* - do the resulting station states */
213
214 all_selection_criteria (smc);
215
216 /* We will check now whether a state transition is allowed or not */
217 /* - change the portstates */
218 cem_priv_state (smc, event);
219
220 do {
221 DB_CFM("CFM : state %s%s event %s",
222 smc->mib.fddiSMTCF_State & AFLAG ? "ACTIONS " : "",
223 cfm_states[smc->mib.fddiSMTCF_State & ~AFLAG],
224 cfm_events[event]);
225 state = smc->mib.fddiSMTCF_State ;
226 cfm_fsm(smc,event) ;
227 event = 0 ;
228 } while (state != smc->mib.fddiSMTCF_State) ;
229
230 #ifndef SLIM_SMT
231 /*
232 * check peer wrap condition
233 */
234 cond = FALSE ;
235 if ( (smc->mib.fddiSMTCF_State == SC9_C_WRAP_A &&
236 smc->y[PA].pc_mode == PM_PEER) ||
237 (smc->mib.fddiSMTCF_State == SC10_C_WRAP_B &&
238 smc->y[PB].pc_mode == PM_PEER) ||
239 (smc->mib.fddiSMTCF_State == SC11_C_WRAP_S &&
240 smc->y[PS].pc_mode == PM_PEER &&
241 smc->y[PS].mib->fddiPORTNeighborType != TS ) ) {
242 cond = TRUE ;
243 }
244 if (cond != smc->mib.fddiSMTPeerWrapFlag)
245 smt_srf_event(smc,SMT_COND_SMT_PEER_WRAP,0,cond) ;
246
247 /*
248 * Don't ever send MAC_PATH_CHANGE events. Our MAC is hard-wired
249 * to the primary path.
250 */
251
252 #endif /* no SLIM_SMT */
253
254 /*
255 * set MAC port type
256 */
257 smc->mib.m[MAC0].fddiMACDownstreamPORTType =
258 cf_to_ptype[smc->mib.fddiSMTCF_State] ;
259 cfm_state_change(smc,(int)smc->mib.fddiSMTCF_State) ;
260 }
261
262 /*
263 process CFM event
264 */
265 /*ARGSUSED1*/
266 static void cfm_fsm(struct s_smc *smc, int cmd)
267 {
268 switch(smc->mib.fddiSMTCF_State) {
269 case ACTIONS(SC0_ISOLATED) :
270 smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_ISOLATED ;
271 smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_ISOLATED ;
272 smc->mib.p[PA].fddiPORTMACPlacement = 0 ;
273 smc->mib.p[PB].fddiPORTMACPlacement = 0 ;
274 smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_SEPA ;
275 config_mux(smc,MUX_ISOLATE) ; /* configure PHY Mux */
276 smc->r.rm_loop = FALSE ;
277 smc->r.rm_join = FALSE ;
278 queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
279 /* Don't do the WC-Flag changing here */
280 ACTIONS_DONE() ;
281 DB_CFMN(1, "CFM : %s", cfm_states[smc->mib.fddiSMTCF_State]);
282 break;
283 case SC0_ISOLATED :
284 /*SC07*/
285 /*SAS port can be PA or PB ! */
286 if (smc->s.sas && (smc->y[PA].cf_join || smc->y[PA].cf_loop ||
287 smc->y[PB].cf_join || smc->y[PB].cf_loop)) {
288 GO_STATE(SC11_C_WRAP_S) ;
289 break ;
290 }
291 /*SC01*/
292 if ((smc->y[PA].cem_pst == CEM_PST_UP && smc->y[PA].cf_join &&
293 !smc->y[PA].wc_flag) || smc->y[PA].cf_loop) {
294 GO_STATE(SC9_C_WRAP_A) ;
295 break ;
296 }
297 /*SC02*/
298 if ((smc->y[PB].cem_pst == CEM_PST_UP && smc->y[PB].cf_join &&
299 !smc->y[PB].wc_flag) || smc->y[PB].cf_loop) {
300 GO_STATE(SC10_C_WRAP_B) ;
301 break ;
302 }
303 break ;
304 case ACTIONS(SC9_C_WRAP_A) :
305 smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_CONCATENATED ;
306 smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_ISOLATED ;
307 smc->mib.p[PA].fddiPORTMACPlacement = INDEX_MAC ;
308 smc->mib.p[PB].fddiPORTMACPlacement = 0 ;
309 smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_CON ;
310 config_mux(smc,MUX_WRAPA) ; /* configure PHY mux */
311 if (smc->y[PA].cf_loop) {
312 smc->r.rm_join = FALSE ;
313 smc->r.rm_loop = TRUE ;
314 queue_event(smc,EVENT_RMT,RM_LOOP) ;/* signal RMT */
315 }
316 if (smc->y[PA].cf_join) {
317 smc->r.rm_loop = FALSE ;
318 smc->r.rm_join = TRUE ;
319 queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
320 }
321 ACTIONS_DONE() ;
322 DB_CFMN(1, "CFM : %s", cfm_states[smc->mib.fddiSMTCF_State]);
323 break ;
324 case SC9_C_WRAP_A :
325 /*SC10*/
326 if ( (smc->y[PA].wc_flag || !smc->y[PA].cf_join) &&
327 !smc->y[PA].cf_loop ) {
328 GO_STATE(SC0_ISOLATED) ;
329 break ;
330 }
331 /*SC12*/
332 else if ( (smc->y[PB].cf_loop && smc->y[PA].cf_join &&
333 smc->y[PA].cem_pst == CEM_PST_UP) ||
334 ((smc->y[PB].cf_loop ||
335 (smc->y[PB].cf_join &&
336 smc->y[PB].cem_pst == CEM_PST_UP)) &&
337 (smc->y[PA].pc_mode == PM_TREE ||
338 smc->y[PB].pc_mode == PM_TREE))) {
339 smc->y[PA].scrub = TRUE ;
340 GO_STATE(SC10_C_WRAP_B) ;
341 break ;
342 }
343 /*SC14*/
344 else if (!smc->s.attach_s &&
345 smc->y[PA].cf_join &&
346 smc->y[PA].cem_pst == CEM_PST_UP &&
347 smc->y[PA].pc_mode == PM_PEER && smc->y[PB].cf_join &&
348 smc->y[PB].cem_pst == CEM_PST_UP &&
349 smc->y[PB].pc_mode == PM_PEER) {
350 smc->y[PA].scrub = TRUE ;
351 smc->y[PB].scrub = TRUE ;
352 GO_STATE(SC4_THRU_A) ;
353 break ;
354 }
355 /*SC15*/
356 else if ( smc->s.attach_s &&
357 smc->y[PA].cf_join &&
358 smc->y[PA].cem_pst == CEM_PST_UP &&
359 smc->y[PA].pc_mode == PM_PEER &&
360 smc->y[PB].cf_join &&
361 smc->y[PB].cem_pst == CEM_PST_UP &&
362 smc->y[PB].pc_mode == PM_PEER) {
363 smc->y[PA].scrub = TRUE ;
364 smc->y[PB].scrub = TRUE ;
365 GO_STATE(SC5_THRU_B) ;
366 break ;
367 }
368 break ;
369 case ACTIONS(SC10_C_WRAP_B) :
370 smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_ISOLATED ;
371 smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_CONCATENATED ;
372 smc->mib.p[PA].fddiPORTMACPlacement = 0 ;
373 smc->mib.p[PB].fddiPORTMACPlacement = INDEX_MAC ;
374 smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_CON ;
375 config_mux(smc,MUX_WRAPB) ; /* configure PHY mux */
376 if (smc->y[PB].cf_loop) {
377 smc->r.rm_join = FALSE ;
378 smc->r.rm_loop = TRUE ;
379 queue_event(smc,EVENT_RMT,RM_LOOP) ;/* signal RMT */
380 }
381 if (smc->y[PB].cf_join) {
382 smc->r.rm_loop = FALSE ;
383 smc->r.rm_join = TRUE ;
384 queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
385 }
386 ACTIONS_DONE() ;
387 DB_CFMN(1, "CFM : %s", cfm_states[smc->mib.fddiSMTCF_State]);
388 break ;
389 case SC10_C_WRAP_B :
390 /*SC20*/
391 if ( !smc->y[PB].cf_join && !smc->y[PB].cf_loop ) {
392 GO_STATE(SC0_ISOLATED) ;
393 break ;
394 }
395 /*SC21*/
396 else if ( smc->y[PA].cf_loop && smc->y[PA].pc_mode == PM_PEER &&
397 smc->y[PB].cf_join && smc->y[PB].pc_mode == PM_PEER) {
398 smc->y[PB].scrub = TRUE ;
399 GO_STATE(SC9_C_WRAP_A) ;
400 break ;
401 }
402 /*SC24*/
403 else if (!smc->s.attach_s &&
404 smc->y[PA].cf_join && smc->y[PA].pc_mode == PM_PEER &&
405 smc->y[PB].cf_join && smc->y[PB].pc_mode == PM_PEER) {
406 smc->y[PA].scrub = TRUE ;
407 smc->y[PB].scrub = TRUE ;
408 GO_STATE(SC4_THRU_A) ;
409 break ;
410 }
411 /*SC25*/
412 else if ( smc->s.attach_s &&
413 smc->y[PA].cf_join && smc->y[PA].pc_mode == PM_PEER &&
414 smc->y[PB].cf_join && smc->y[PB].pc_mode == PM_PEER) {
415 smc->y[PA].scrub = TRUE ;
416 smc->y[PB].scrub = TRUE ;
417 GO_STATE(SC5_THRU_B) ;
418 break ;
419 }
420 break ;
421 case ACTIONS(SC4_THRU_A) :
422 smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_THRU ;
423 smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_THRU ;
424 smc->mib.p[PA].fddiPORTMACPlacement = 0 ;
425 smc->mib.p[PB].fddiPORTMACPlacement = INDEX_MAC ;
426 smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_THRU ;
427 config_mux(smc,MUX_THRUA) ; /* configure PHY mux */
428 smc->r.rm_loop = FALSE ;
429 smc->r.rm_join = TRUE ;
430 queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
431 ACTIONS_DONE() ;
432 DB_CFMN(1, "CFM : %s", cfm_states[smc->mib.fddiSMTCF_State]);
433 break ;
434 case SC4_THRU_A :
435 /*SC41*/
436 if (smc->y[PB].wc_flag || !smc->y[PB].cf_join) {
437 smc->y[PA].scrub = TRUE ;
438 GO_STATE(SC9_C_WRAP_A) ;
439 break ;
440 }
441 /*SC42*/
442 else if (!smc->y[PA].cf_join || smc->y[PA].wc_flag) {
443 smc->y[PB].scrub = TRUE ;
444 GO_STATE(SC10_C_WRAP_B) ;
445 break ;
446 }
447 /*SC45*/
448 else if (smc->s.attach_s) {
449 smc->y[PB].scrub = TRUE ;
450 GO_STATE(SC5_THRU_B) ;
451 break ;
452 }
453 break ;
454 case ACTIONS(SC5_THRU_B) :
455 smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_THRU ;
456 smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_THRU ;
457 smc->mib.p[PA].fddiPORTMACPlacement = INDEX_MAC ;
458 smc->mib.p[PB].fddiPORTMACPlacement = 0 ;
459 smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_THRU ;
460 config_mux(smc,MUX_THRUB) ; /* configure PHY mux */
461 smc->r.rm_loop = FALSE ;
462 smc->r.rm_join = TRUE ;
463 queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
464 ACTIONS_DONE() ;
465 DB_CFMN(1, "CFM : %s", cfm_states[smc->mib.fddiSMTCF_State]);
466 break ;
467 case SC5_THRU_B :
468 /*SC51*/
469 if (!smc->y[PB].cf_join || smc->y[PB].wc_flag) {
470 smc->y[PA].scrub = TRUE ;
471 GO_STATE(SC9_C_WRAP_A) ;
472 break ;
473 }
474 /*SC52*/
475 else if (!smc->y[PA].cf_join || smc->y[PA].wc_flag) {
476 smc->y[PB].scrub = TRUE ;
477 GO_STATE(SC10_C_WRAP_B) ;
478 break ;
479 }
480 /*SC54*/
481 else if (!smc->s.attach_s) {
482 smc->y[PA].scrub = TRUE ;
483 GO_STATE(SC4_THRU_A) ;
484 break ;
485 }
486 break ;
487 case ACTIONS(SC11_C_WRAP_S) :
488 smc->mib.p[PS].fddiPORTCurrentPath = MIB_PATH_CONCATENATED ;
489 smc->mib.p[PS].fddiPORTMACPlacement = INDEX_MAC ;
490 smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_CON ;
491 config_mux(smc,MUX_WRAPS) ; /* configure PHY mux */
492 if (smc->y[PA].cf_loop || smc->y[PB].cf_loop) {
493 smc->r.rm_join = FALSE ;
494 smc->r.rm_loop = TRUE ;
495 queue_event(smc,EVENT_RMT,RM_LOOP) ;/* signal RMT */
496 }
497 if (smc->y[PA].cf_join || smc->y[PB].cf_join) {
498 smc->r.rm_loop = FALSE ;
499 smc->r.rm_join = TRUE ;
500 queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
501 }
502 ACTIONS_DONE() ;
503 DB_CFMN(1, "CFM : %s", cfm_states[smc->mib.fddiSMTCF_State]);
504 break ;
505 case SC11_C_WRAP_S :
506 /*SC70*/
507 if ( !smc->y[PA].cf_join && !smc->y[PA].cf_loop &&
508 !smc->y[PB].cf_join && !smc->y[PB].cf_loop) {
509 GO_STATE(SC0_ISOLATED) ;
510 break ;
511 }
512 break ;
513 default:
514 SMT_PANIC(smc,SMT_E0106, SMT_E0106_MSG) ;
515 break;
516 }
517 }
518
519 /*
520 * get MAC's input Port
521 * return :
522 * PA or PB
523 */
524 int cfm_get_mac_input(struct s_smc *smc)
525 {
526 return (smc->mib.fddiSMTCF_State == SC10_C_WRAP_B ||
527 smc->mib.fddiSMTCF_State == SC5_THRU_B) ? PB : PA;
528 }
529
530 /*
531 * get MAC's output Port
532 * return :
533 * PA or PB
534 */
535 int cfm_get_mac_output(struct s_smc *smc)
536 {
537 return (smc->mib.fddiSMTCF_State == SC10_C_WRAP_B ||
538 smc->mib.fddiSMTCF_State == SC4_THRU_A) ? PB : PA;
539 }
540
541 static char path_iso[] = {
542 0,0, 0,RES_PORT, 0,PA + INDEX_PORT, 0,PATH_ISO,
543 0,0, 0,RES_MAC, 0,INDEX_MAC, 0,PATH_ISO,
544 0,0, 0,RES_PORT, 0,PB + INDEX_PORT, 0,PATH_ISO
545 } ;
546
547 static char path_wrap_a[] = {
548 0,0, 0,RES_PORT, 0,PA + INDEX_PORT, 0,PATH_PRIM,
549 0,0, 0,RES_MAC, 0,INDEX_MAC, 0,PATH_PRIM,
550 0,0, 0,RES_PORT, 0,PB + INDEX_PORT, 0,PATH_ISO
551 } ;
552
553 static char path_wrap_b[] = {
554 0,0, 0,RES_PORT, 0,PB + INDEX_PORT, 0,PATH_PRIM,
555 0,0, 0,RES_MAC, 0,INDEX_MAC, 0,PATH_PRIM,
556 0,0, 0,RES_PORT, 0,PA + INDEX_PORT, 0,PATH_ISO
557 } ;
558
559 static char path_thru[] = {
560 0,0, 0,RES_PORT, 0,PA + INDEX_PORT, 0,PATH_PRIM,
561 0,0, 0,RES_MAC, 0,INDEX_MAC, 0,PATH_PRIM,
562 0,0, 0,RES_PORT, 0,PB + INDEX_PORT, 0,PATH_PRIM
563 } ;
564
565 static char path_wrap_s[] = {
566 0,0, 0,RES_PORT, 0,PS + INDEX_PORT, 0,PATH_PRIM,
567 0,0, 0,RES_MAC, 0,INDEX_MAC, 0,PATH_PRIM,
568 } ;
569
570 static char path_iso_s[] = {
571 0,0, 0,RES_PORT, 0,PS + INDEX_PORT, 0,PATH_ISO,
572 0,0, 0,RES_MAC, 0,INDEX_MAC, 0,PATH_ISO,
573 } ;
574
575 int cem_build_path(struct s_smc *smc, char *to, int path_index)
576 {
577 char *path ;
578 int len ;
579
580 switch (smc->mib.fddiSMTCF_State) {
581 default :
582 case SC0_ISOLATED :
583 path = smc->s.sas ? path_iso_s : path_iso ;
584 len = smc->s.sas ? sizeof(path_iso_s) : sizeof(path_iso) ;
585 break ;
586 case SC9_C_WRAP_A :
587 path = path_wrap_a ;
588 len = sizeof(path_wrap_a) ;
589 break ;
590 case SC10_C_WRAP_B :
591 path = path_wrap_b ;
592 len = sizeof(path_wrap_b) ;
593 break ;
594 case SC4_THRU_A :
595 path = path_thru ;
596 len = sizeof(path_thru) ;
597 break ;
598 case SC11_C_WRAP_S :
599 path = path_wrap_s ;
600 len = sizeof(path_wrap_s) ;
601 break ;
602 }
603 memcpy(to,path,len) ;
604
605 LINT_USE(path_index);
606
607 return len;
608 }
Linux with added FPC-III support