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 * *******************************************************************
19 * This SBA code implements the Synchronous Bandwidth Allocation
20 * functions described in the "FDDI Synchronous Forum Implementer's
21 * Agreement" dated December 1th, 1993.
22 * *******************************************************************
23 *
24 * PURPOSE: The purpose of this function is to control
25 * synchronous allocations on a single FDDI segment.
26 * Allocations are limited to the primary FDDI ring.
27 * The SBM provides recovery mechanisms to recover
28 * unused bandwidth also resolves T_Neg and
29 * reconfiguration changes. Many of the SBM state
30 * machine inputs are sourced by the underlying
31 * FDDI sub-system supporting the SBA application.
32 *
33 * *******************************************************************
34 */
35
36 #include "h/types.h"
37 #include "h/fddi.h"
38 #include "h/smc.h"
39 #include "h/smt_p.h"
40
41
42 #ifndef SLIM_SMT
43
44 #ifdef ESS
45
46 #ifndef lint
47 static const char ID_sccs[] = "@(#)ess.c 1.10 96/02/23 (C) SK" ;
48 #define LINT_USE(x)
49 #else
50 #define LINT_USE(x) (x)=(x)
51 #endif
52 #define MS2BCLK(x) ((x)*12500L)
53
54 /*
55 -------------------------------------------------------------
56 LOCAL VARIABLES:
57 -------------------------------------------------------------
58 */
59
60 static const u_short plist_raf_alc_res[] = { SMT_P0012, SMT_P320B, SMT_P320F,
61 SMT_P3210, SMT_P0019, SMT_P001A,
62 SMT_P001D, 0 } ;
63
64 static const u_short plist_raf_chg_req[] = { SMT_P320B, SMT_P320F, SMT_P3210,
65 SMT_P001A, 0 } ;
66
67 static const struct fddi_addr smt_sba_da = {{0x80,0x01,0x43,0x00,0x80,0x0C}} ;
68 static const struct fddi_addr null_addr = {{0,0,0,0,0,0}} ;
69
70 /*
71 -------------------------------------------------------------
72 GLOBAL VARIABLES:
73 -------------------------------------------------------------
74 */
75
76
77 /*
78 -------------------------------------------------------------
79 LOCAL FUNCTIONS:
80 -------------------------------------------------------------
81 */
82
83 static void ess_send_response(), ess_config_fifo(),
84 ess_send_alc_req(), ess_send_frame() ;
85
86 /*
87 -------------------------------------------------------------
88 EXTERNAL FUNCTIONS:
89 -------------------------------------------------------------
90 */
91
92 extern void *sm_to_para() ;
93
94 extern void smt_send_frame(), smt_free_mbuf(),
95 set_formac_tsync(), formac_reinit_tx() ;
96
97 extern int smt_check_para() ;
98
99 extern SMbuf *smt_get_mbuf(), *smt_build_frame() ;
100
101 extern u_long smt_get_tid() ;
102
103 /*
104 -------------------------------------------------------------
105 PUBLIC FUNCTIONS:
106 -------------------------------------------------------------
107 */
108
109 void ess_timer_poll(), ess_para_change() ;
110
111 int ess_raf_received_pack(), process_bw_alloc() ;
112
113
114 /*
115 * --------------------------------------------------------------------------
116 * End Station Support (ESS)
117 * --------------------------------------------------------------------------
118 */
119
120 /*
121 * evaluate the RAF frame
122 */
ess_raf_received_pack(smc,mb,sm,fs)123 int ess_raf_received_pack(smc,mb,sm,fs)
124 struct s_smc *smc ;
125 SMbuf *mb ;
126 struct smt_header *sm ;
127 int fs ;
128 {
129 void *p ; /* universal pointer */
130 struct smt_p_0016 *cmd ; /* para: command for the ESS */
131 SMbuf *db ;
132 u_long msg_res_type ; /* recource type */
133 u_long payload, overhead ;
134 int local ;
135 int i ;
136
137 /*
138 * Message Processing Code
139 */
140 local = ((fs & L_INDICATOR) != 0) ;
141
142 /*
143 * get the resource type
144 */
145 if (!(p = (void *) sm_to_para(smc,sm,SMT_P0015))) {
146 DB_ESS("ESS: RAF frame error, parameter type not found\n",0,0) ;
147 return(fs) ;
148 }
149 msg_res_type = ((struct smt_p_0015 *)p)->res_type ;
150
151 /*
152 * get the pointer to the ESS command
153 */
154 if (!(cmd = (struct smt_p_0016 *) sm_to_para(smc,sm,SMT_P0016))) {
155 /*
156 * error in frame: para ESS command was not found
157 */
158 DB_ESS("ESS: RAF frame error, parameter command not found\n",0,0);
159 return(fs) ;
160 }
161
162 DB_ESSN(2,"fc %x ft %x\n",sm->smt_class,sm->smt_type) ;
163 DB_ESSN(2,"ver %x tran %lx\n",sm->smt_version,sm->smt_tid) ;
164 DB_ESSN(2,"stn_id %s\n",addr_to_string(&sm->smt_source),0) ;
165
166 DB_ESSN(2,"infolen %x res %x\n",sm->smt_len, msg_res_type) ;
167 DB_ESSN(2,"sbacmd %x\n",cmd->sba_cmd,0) ;
168
169 /*
170 * evaluate the ESS command
171 */
172 switch (cmd->sba_cmd) {
173
174 /*
175 * Process an ESS Allocation Request
176 */
177 case REQUEST_ALLOCATION :
178 /*
179 * check for an RAF Request (Allocation Request)
180 */
181 if (sm->smt_type == SMT_REQUEST) {
182 /*
183 * process the Allocation request only if the frame is
184 * local and no static allocation is used
185 */
186 if (!local || smc->mib.fddiESSPayload)
187 return(fs) ;
188
189 p = (void *) sm_to_para(smc,sm,SMT_P0019) ;
190 for (i = 0; i < 5; i++) {
191 if (((struct smt_p_0019 *)p)->alloc_addr.a[i]) {
192 return(fs) ;
193 }
194 }
195
196 /*
197 * Note: The Application should send a LAN_LOC_FRAME.
198 * The ESS do not send the Frame to the network!
199 */
200 smc->ess.alloc_trans_id = sm->smt_tid ;
201 DB_ESS("ESS: save Alloc Req Trans ID %lx\n",sm->smt_tid,0);
202 p = (void *) sm_to_para(smc,sm,SMT_P320F) ;
203 ((struct smt_p_320f *)p)->mib_payload =
204 smc->mib.a[PATH0].fddiPATHSbaPayload ;
205 p = (void *) sm_to_para(smc,sm,SMT_P3210) ;
206 ((struct smt_p_3210 *)p)->mib_overhead =
207 smc->mib.a[PATH0].fddiPATHSbaOverhead ;
208 sm->smt_dest = smt_sba_da ;
209
210 if (smc->ess.local_sba_active)
211 return(fs | I_INDICATOR) ;
212
213 if (!(db = smt_get_mbuf(smc)))
214 return(fs) ;
215
216 db->sm_len = mb->sm_len ;
217 db->sm_off = mb->sm_off ;
218 memcpy(((char *)(db->sm_data+db->sm_off)),(char *)sm,
219 (int)db->sm_len) ;
220 dump_smt(smc,
221 (struct smt_header *)(db->sm_data+db->sm_off),
222 "RAF") ;
223 smt_send_frame(smc,db,FC_SMT_INFO,0) ;
224 return(fs) ;
225 }
226
227 /*
228 * The RAF frame is an Allocation Response !
229 * check the parameters
230 */
231 if (smt_check_para(smc,sm,plist_raf_alc_res)) {
232 DB_ESS("ESS: RAF with para problem, ignoring\n",0,0) ;
233 return(fs) ;
234 }
235
236 /*
237 * VERIFY THE FRAME IS WELL BUILT:
238 *
239 * 1. path index = primary ring only
240 * 2. resource type = sync bw only
241 * 3. trans action id = alloc_trans_id
242 * 4. reason code = success
243 *
244 * If any are violated, discard the RAF frame
245 */
246 if ((((struct smt_p_320b *)sm_to_para(smc,sm,SMT_P320B))->path_index
247 != PRIMARY_RING) ||
248 (msg_res_type != SYNC_BW) ||
249 (((struct smt_p_reason *)sm_to_para(smc,sm,SMT_P0012))->rdf_reason
250 != SMT_RDF_SUCCESS) ||
251 (sm->smt_tid != smc->ess.alloc_trans_id)) {
252
253 DB_ESS("ESS: Allocation Responce not accepted\n",0,0) ;
254 return(fs) ;
255 }
256
257 /*
258 * Extract message parameters
259 */
260 p = (void *) sm_to_para(smc,sm,SMT_P320F) ;
261 if (!p) {
262 printk(KERN_ERR "ESS: sm_to_para failed");
263 return fs;
264 }
265 payload = ((struct smt_p_320f *)p)->mib_payload ;
266 p = (void *) sm_to_para(smc,sm,SMT_P3210) ;
267 if (!p) {
268 printk(KERN_ERR "ESS: sm_to_para failed");
269 return fs;
270 }
271 overhead = ((struct smt_p_3210 *)p)->mib_overhead ;
272
273 DB_ESSN(2,"payload= %lx overhead= %lx\n",payload,overhead) ;
274
275 /*
276 * process the bandwidth allocation
277 */
278 (void)process_bw_alloc(smc,(long)payload,(long)overhead) ;
279
280 return(fs) ;
281 /* end of Process Allocation Request */
282
283 /*
284 * Process an ESS Change Request
285 */
286 case CHANGE_ALLOCATION :
287 /*
288 * except only replies
289 */
290 if (sm->smt_type != SMT_REQUEST) {
291 DB_ESS("ESS: Do not process Change Responses\n",0,0) ;
292 return(fs) ;
293 }
294
295 /*
296 * check the para for the Change Request
297 */
298 if (smt_check_para(smc,sm,plist_raf_chg_req)) {
299 DB_ESS("ESS: RAF with para problem, ignoring\n",0,0) ;
300 return(fs) ;
301 }
302
303 /*
304 * Verify the path index and resource
305 * type are correct. If any of
306 * these are false, don't process this
307 * change request frame.
308 */
309 if ((((struct smt_p_320b *)sm_to_para(smc,sm,SMT_P320B))->path_index
310 != PRIMARY_RING) || (msg_res_type != SYNC_BW)) {
311 DB_ESS("ESS: RAF frame with para problem, ignoring\n",0,0) ;
312 return(fs) ;
313 }
314
315 /*
316 * Extract message queue parameters
317 */
318 p = (void *) sm_to_para(smc,sm,SMT_P320F) ;
319 payload = ((struct smt_p_320f *)p)->mib_payload ;
320 p = (void *) sm_to_para(smc,sm,SMT_P3210) ;
321 overhead = ((struct smt_p_3210 *)p)->mib_overhead ;
322
323 DB_ESSN(2,"ESS: Change Request from %s\n",
324 addr_to_string(&sm->smt_source),0) ;
325 DB_ESSN(2,"payload= %lx overhead= %lx\n",payload,overhead) ;
326
327 /*
328 * process the bandwidth allocation
329 */
330 if(!process_bw_alloc(smc,(long)payload,(long)overhead))
331 return(fs) ;
332
333 /*
334 * send an RAF Change Reply
335 */
336 ess_send_response(smc,sm,CHANGE_ALLOCATION) ;
337
338 return(fs) ;
339 /* end of Process Change Request */
340
341 /*
342 * Process Report Response
343 */
344 case REPORT_ALLOCATION :
345 /*
346 * except only requests
347 */
348 if (sm->smt_type != SMT_REQUEST) {
349 DB_ESS("ESS: Do not process a Report Reply\n",0,0) ;
350 return(fs) ;
351 }
352
353 DB_ESSN(2,"ESS: Report Request from %s\n",
354 addr_to_string(&(sm->smt_source)),0) ;
355
356 /*
357 * verify that the resource type is sync bw only
358 */
359 if (msg_res_type != SYNC_BW) {
360 DB_ESS("ESS: ignoring RAF with para problem\n",0,0) ;
361 return(fs) ;
362 }
363
364 /*
365 * send an RAF Change Reply
366 */
367 ess_send_response(smc,sm,REPORT_ALLOCATION) ;
368
369 return(fs) ;
370 /* end of Process Report Request */
371
372 default:
373 /*
374 * error in frame
375 */
376 DB_ESS("ESS: ignoring RAF with bad sba_cmd\n",0,0) ;
377 break ;
378 }
379
380 return(fs) ;
381 }
382
383 /*
384 * determines the synchronous bandwidth, set the TSYNC register and the
385 * mib variables SBAPayload, SBAOverhead and fddiMACT-NEG.
386 */
process_bw_alloc(smc,payload,overhead)387 int process_bw_alloc(smc,payload,overhead)
388 struct s_smc *smc ;
389 long payload ;
390 long overhead ;
391 {
392 /*
393 * determine the synchronous bandwidth (sync_bw) in bytes per T-NEG,
394 * if the payload is greater than zero.
395 * For the SBAPayload and the SBAOverhead we have the following
396 * unite quations
397 * _ _
398 * | bytes |
399 * SBAPayload = | 8000 ------ |
400 * | s |
401 * - -
402 * _ _
403 * | bytes |
404 * SBAOverhead = | ------ |
405 * | T-NEG |
406 * - -
407 *
408 * T-NEG is discribed by the equation:
409 *
410 * (-) fddiMACT-NEG
411 * T-NEG = -------------------
412 * 12500000 1/s
413 *
414 * The number of bytes we are able to send is the payload
415 * plus the overhead.
416 *
417 * bytes T-NEG SBAPayload 8000 bytes/s
418 * sync_bw = SBAOverhead ------ + -----------------------------
419 * T-NEG T-NEG
420 *
421 *
422 * 1
423 * sync_bw = SBAOverhead + ---- (-)fddiMACT-NEG * SBAPayload
424 * 1562
425 *
426 */
427
428 /*
429 * set the mib attributes fddiPATHSbaOverhead, fddiPATHSbaPayload
430 */
431 /* if (smt_set_obj(smc,SMT_P320F,payload,S_SET)) {
432 DB_ESS("ESS: SMT does not accept the payload value\n",0,0) ;
433 return(FALSE) ;
434 }
435 if (smt_set_obj(smc,SMT_P3210,overhead,S_SET)) {
436 DB_ESS("ESS: SMT does not accept the overhead value\n",0,0) ;
437 return(FALSE) ;
438 } */
439
440 /* premliminary */
441 if (payload > MAX_PAYLOAD || overhead > 5000) {
442 DB_ESS("ESS: payload / overhead not accepted\n",0,0) ;
443 return(FALSE) ;
444 }
445
446 /*
447 * start the iterative allocation process if the payload or the overhead
448 * are smaller than the parsed values
449 */
450 if (smc->mib.fddiESSPayload &&
451 ((u_long)payload != smc->mib.fddiESSPayload ||
452 (u_long)overhead != smc->mib.fddiESSOverhead)) {
453 smc->ess.raf_act_timer_poll = TRUE ;
454 smc->ess.timer_count = 0 ;
455 }
456
457 /*
458 * evulate the Payload
459 */
460 if (payload) {
461 DB_ESSN(2,"ESS: turn SMT_ST_SYNC_SERVICE bit on\n",0,0) ;
462 smc->ess.sync_bw_available = TRUE ;
463
464 smc->ess.sync_bw = overhead -
465 (long)smc->mib.m[MAC0].fddiMACT_Neg *
466 payload / 1562 ;
467 }
468 else {
469 DB_ESSN(2,"ESS: turn SMT_ST_SYNC_SERVICE bit off\n",0,0) ;
470 smc->ess.sync_bw_available = FALSE ;
471 smc->ess.sync_bw = 0 ;
472 overhead = 0 ;
473 }
474
475 smc->mib.a[PATH0].fddiPATHSbaPayload = payload ;
476 smc->mib.a[PATH0].fddiPATHSbaOverhead = overhead ;
477
478
479 DB_ESSN(2,"tsync = %lx\n",smc->ess.sync_bw,0) ;
480
481 ess_config_fifo(smc) ;
482 set_formac_tsync(smc,smc->ess.sync_bw) ;
483 return(TRUE) ;
484 }
485
ess_send_response(smc,sm,sba_cmd)486 static void ess_send_response(smc,sm,sba_cmd)
487 struct s_smc *smc ;
488 struct smt_header *sm ;
489 int sba_cmd ;
490 {
491 struct smt_sba_chg *chg ;
492 SMbuf *mb ;
493 void *p ;
494
495 /*
496 * get and initialize the responce frame
497 */
498 if (sba_cmd == CHANGE_ALLOCATION) {
499 if (!(mb=smt_build_frame(smc,SMT_RAF,SMT_REPLY,
500 sizeof(struct smt_sba_chg))))
501 return ;
502 }
503 else {
504 if (!(mb=smt_build_frame(smc,SMT_RAF,SMT_REPLY,
505 sizeof(struct smt_sba_rep_res))))
506 return ;
507 }
508
509 chg = smtod(mb,struct smt_sba_chg *) ;
510 chg->smt.smt_tid = sm->smt_tid ;
511 chg->smt.smt_dest = sm->smt_source ;
512
513 /* set P15 */
514 chg->s_type.para.p_type = SMT_P0015 ;
515 chg->s_type.para.p_len = sizeof(struct smt_p_0015) - PARA_LEN ;
516 chg->s_type.res_type = SYNC_BW ;
517
518 /* set P16 */
519 chg->cmd.para.p_type = SMT_P0016 ;
520 chg->cmd.para.p_len = sizeof(struct smt_p_0016) - PARA_LEN ;
521 chg->cmd.sba_cmd = sba_cmd ;
522
523 /* set P320B */
524 chg->path.para.p_type = SMT_P320B ;
525 chg->path.para.p_len = sizeof(struct smt_p_320b) - PARA_LEN ;
526 chg->path.mib_index = SBAPATHINDEX ;
527 chg->path.path_pad = (u_short)NULL ;
528 chg->path.path_index = PRIMARY_RING ;
529
530 /* set P320F */
531 chg->payload.para.p_type = SMT_P320F ;
532 chg->payload.para.p_len = sizeof(struct smt_p_320f) - PARA_LEN ;
533 chg->payload.mib_index = SBAPATHINDEX ;
534 chg->payload.mib_payload = smc->mib.a[PATH0].fddiPATHSbaPayload ;
535
536 /* set P3210 */
537 chg->overhead.para.p_type = SMT_P3210 ;
538 chg->overhead.para.p_len = sizeof(struct smt_p_3210) - PARA_LEN ;
539 chg->overhead.mib_index = SBAPATHINDEX ;
540 chg->overhead.mib_overhead = smc->mib.a[PATH0].fddiPATHSbaOverhead ;
541
542 if (sba_cmd == CHANGE_ALLOCATION) {
543 /* set P1A */
544 chg->cat.para.p_type = SMT_P001A ;
545 chg->cat.para.p_len = sizeof(struct smt_p_001a) - PARA_LEN ;
546 p = (void *) sm_to_para(smc,sm,SMT_P001A) ;
547 chg->cat.category = ((struct smt_p_001a *)p)->category ;
548 }
549 dump_smt(smc,(struct smt_header *)chg,"RAF") ;
550 ess_send_frame(smc,mb) ;
551 }
552
553
ess_timer_poll(smc)554 void ess_timer_poll(smc)
555 struct s_smc *smc ;
556 {
557 if (!smc->ess.raf_act_timer_poll)
558 return ;
559
560 DB_ESSN(2,"ESS: timer_poll\n",0,0) ;
561
562 smc->ess.timer_count++ ;
563 if (smc->ess.timer_count == 10) {
564 smc->ess.timer_count = 0 ;
565 ess_send_alc_req(smc) ;
566 }
567 }
568
ess_send_alc_req(smc)569 static void ess_send_alc_req(smc)
570 struct s_smc *smc ;
571 {
572 struct smt_sba_alc_req *req ;
573 SMbuf *mb ;
574
575 /*
576 * send never allocation request where the requested payload and
577 * overhead is zero or deallocate bandwidht when no bandwidth is
578 * parsed
579 */
580 if (!smc->mib.fddiESSPayload) {
581 smc->mib.fddiESSOverhead = 0 ;
582 }
583 else {
584 if (!smc->mib.fddiESSOverhead)
585 smc->mib.fddiESSOverhead = DEFAULT_OV ;
586 }
587
588 if (smc->mib.fddiESSOverhead ==
589 smc->mib.a[PATH0].fddiPATHSbaOverhead &&
590 smc->mib.fddiESSPayload ==
591 smc->mib.a[PATH0].fddiPATHSbaPayload){
592 smc->ess.raf_act_timer_poll = FALSE ;
593 smc->ess.timer_count = 7 ; /* next RAF alc req after 3 s */
594 return ;
595 }
596
597 /*
598 * get and initialize the responce frame
599 */
600 if (!(mb=smt_build_frame(smc,SMT_RAF,SMT_REQUEST,
601 sizeof(struct smt_sba_alc_req))))
602 return ;
603 req = smtod(mb,struct smt_sba_alc_req *) ;
604 req->smt.smt_tid = smc->ess.alloc_trans_id = smt_get_tid(smc) ;
605 req->smt.smt_dest = smt_sba_da ;
606
607 /* set P15 */
608 req->s_type.para.p_type = SMT_P0015 ;
609 req->s_type.para.p_len = sizeof(struct smt_p_0015) - PARA_LEN ;
610 req->s_type.res_type = SYNC_BW ;
611
612 /* set P16 */
613 req->cmd.para.p_type = SMT_P0016 ;
614 req->cmd.para.p_len = sizeof(struct smt_p_0016) - PARA_LEN ;
615 req->cmd.sba_cmd = REQUEST_ALLOCATION ;
616
617 /*
618 * set the parameter type and parameter lenght of all used
619 * parameters
620 */
621
622 /* set P320B */
623 req->path.para.p_type = SMT_P320B ;
624 req->path.para.p_len = sizeof(struct smt_p_320b) - PARA_LEN ;
625 req->path.mib_index = SBAPATHINDEX ;
626 req->path.path_pad = (u_short)NULL ;
627 req->path.path_index = PRIMARY_RING ;
628
629 /* set P0017 */
630 req->pl_req.para.p_type = SMT_P0017 ;
631 req->pl_req.para.p_len = sizeof(struct smt_p_0017) - PARA_LEN ;
632 req->pl_req.sba_pl_req = smc->mib.fddiESSPayload -
633 smc->mib.a[PATH0].fddiPATHSbaPayload ;
634
635 /* set P0018 */
636 req->ov_req.para.p_type = SMT_P0018 ;
637 req->ov_req.para.p_len = sizeof(struct smt_p_0018) - PARA_LEN ;
638 req->ov_req.sba_ov_req = smc->mib.fddiESSOverhead -
639 smc->mib.a[PATH0].fddiPATHSbaOverhead ;
640
641 /* set P320F */
642 req->payload.para.p_type = SMT_P320F ;
643 req->payload.para.p_len = sizeof(struct smt_p_320f) - PARA_LEN ;
644 req->payload.mib_index = SBAPATHINDEX ;
645 req->payload.mib_payload = smc->mib.a[PATH0].fddiPATHSbaPayload ;
646
647 /* set P3210 */
648 req->overhead.para.p_type = SMT_P3210 ;
649 req->overhead.para.p_len = sizeof(struct smt_p_3210) - PARA_LEN ;
650 req->overhead.mib_index = SBAPATHINDEX ;
651 req->overhead.mib_overhead = smc->mib.a[PATH0].fddiPATHSbaOverhead ;
652
653 /* set P19 */
654 req->a_addr.para.p_type = SMT_P0019 ;
655 req->a_addr.para.p_len = sizeof(struct smt_p_0019) - PARA_LEN ;
656 req->a_addr.sba_pad = (u_short)NULL ;
657 req->a_addr.alloc_addr = null_addr ;
658
659 /* set P1A */
660 req->cat.para.p_type = SMT_P001A ;
661 req->cat.para.p_len = sizeof(struct smt_p_001a) - PARA_LEN ;
662 req->cat.category = smc->mib.fddiESSCategory ;
663
664 /* set P1B */
665 req->tneg.para.p_type = SMT_P001B ;
666 req->tneg.para.p_len = sizeof(struct smt_p_001b) - PARA_LEN ;
667 req->tneg.max_t_neg = smc->mib.fddiESSMaxTNeg ;
668
669 /* set P1C */
670 req->segm.para.p_type = SMT_P001C ;
671 req->segm.para.p_len = sizeof(struct smt_p_001c) - PARA_LEN ;
672 req->segm.min_seg_siz = smc->mib.fddiESSMinSegmentSize ;
673
674 dump_smt(smc,(struct smt_header *)req,"RAF") ;
675 ess_send_frame(smc,mb) ;
676 }
677
ess_send_frame(smc,mb)678 static void ess_send_frame(smc,mb)
679 struct s_smc *smc ;
680 SMbuf *mb ;
681 {
682 /*
683 * check if the frame must be send to the own ESS
684 */
685 if (smc->ess.local_sba_active) {
686 /*
687 * Send the Change Reply to the local SBA
688 */
689 DB_ESS("ESS:Send to the local SBA\n",0,0) ;
690 if (!smc->ess.sba_reply_pend)
691 smc->ess.sba_reply_pend = mb ;
692 else {
693 DB_ESS("Frame is lost - another frame was pending\n",0,0);
694 smt_free_mbuf(smc,mb) ;
695 }
696 }
697 else {
698 /*
699 * Send the SBA RAF Change Reply to the network
700 */
701 DB_ESS("ESS:Send to the network\n",0,0) ;
702 smt_send_frame(smc,mb,FC_SMT_INFO,0) ;
703 }
704 }
705
ess_para_change(smc)706 void ess_para_change(smc)
707 struct s_smc *smc ;
708 {
709 (void)process_bw_alloc(smc,(long)smc->mib.a[PATH0].fddiPATHSbaPayload,
710 (long)smc->mib.a[PATH0].fddiPATHSbaOverhead) ;
711 }
712
ess_config_fifo(smc)713 static void ess_config_fifo(smc)
714 struct s_smc *smc ;
715 {
716 /*
717 * if nothing to do exit
718 */
719 if (smc->mib.a[PATH0].fddiPATHSbaPayload) {
720 if (smc->hw.fp.fifo.fifo_config_mode & SYNC_TRAFFIC_ON &&
721 (smc->hw.fp.fifo.fifo_config_mode&SEND_ASYNC_AS_SYNC) ==
722 smc->mib.fddiESSSynchTxMode) {
723 return ;
724 }
725 }
726 else {
727 if (!(smc->hw.fp.fifo.fifo_config_mode & SYNC_TRAFFIC_ON)) {
728 return ;
729 }
730 }
731
732 /*
733 * split up the FIFO and reinitialize the queues
734 */
735 formac_reinit_tx(smc) ;
736 }
737
738 #endif /* ESS */
739
740 #endif /* no SLIM_SMT */
741