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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 * *******************************************************************
15 * This SBA code implements the Synchronous Bandwidth Allocation
16 * functions described in the "FDDI Synchronous Forum Implementer's
17 * Agreement" dated December 1th, 1993.
18 * *******************************************************************
19 *
20 * PURPOSE: The purpose of this function is to control
21 * synchronous allocations on a single FDDI segment.
22 * Allocations are limited to the primary FDDI ring.
23 * The SBM provides recovery mechanisms to recover
24 * unused bandwidth also resolves T_Neg and
25 * reconfiguration changes. Many of the SBM state
26 * machine inputs are sourced by the underlying
27 * FDDI sub-system supporting the SBA application.
28 *
29 * *******************************************************************
30 */
31
32#include "h/types.h"
33#include "h/fddi.h"
34#include "h/smc.h"
35#include "h/smt_p.h"
36
37
38#ifndef SLIM_SMT
39
40#ifdef ESS
41
42#ifndef lint
43#define LINT_USE(x)
44#else
45#define LINT_USE(x) (x)=(x)
46#endif
47#define MS2BCLK(x) ((x)*12500L)
48
49/*
50 -------------------------------------------------------------
51 LOCAL VARIABLES:
52 -------------------------------------------------------------
53*/
54
55static const u_short plist_raf_alc_res[] = { SMT_P0012, SMT_P320B, SMT_P320F,
56 SMT_P3210, SMT_P0019, SMT_P001A,
57 SMT_P001D, 0 } ;
58
59static const u_short plist_raf_chg_req[] = { SMT_P320B, SMT_P320F, SMT_P3210,
60 SMT_P001A, 0 } ;
61
62static const struct fddi_addr smt_sba_da = {{0x80,0x01,0x43,0x00,0x80,0x0C}} ;
63static const struct fddi_addr null_addr = {{0,0,0,0,0,0}} ;
64
65/*
66 -------------------------------------------------------------
67 GLOBAL VARIABLES:
68 -------------------------------------------------------------
69*/
70
71
72/*
73 -------------------------------------------------------------
74 LOCAL FUNCTIONS:
75 -------------------------------------------------------------
76*/
77
78static void ess_send_response(struct s_smc *smc, struct smt_header *sm,
79 int sba_cmd);
80static void ess_config_fifo(struct s_smc *smc);
81static void ess_send_alc_req(struct s_smc *smc);
82static void ess_send_frame(struct s_smc *smc, SMbuf *mb);
83
84/*
85 -------------------------------------------------------------
86 EXTERNAL FUNCTIONS:
87 -------------------------------------------------------------
88*/
89
90/*
91 -------------------------------------------------------------
92 PUBLIC FUNCTIONS:
93 -------------------------------------------------------------
94*/
95
96void ess_timer_poll(struct s_smc *smc);
97void ess_para_change(struct s_smc *smc);
98int ess_raf_received_pack(struct s_smc *smc, SMbuf *mb, struct smt_header *sm,
99 int fs);
100static int process_bw_alloc(struct s_smc *smc, long int payload, long int overhead);
101
102
103/*
104 * --------------------------------------------------------------------------
105 * End Station Support (ESS)
106 * --------------------------------------------------------------------------
107 */
108
109/*
110 * evaluate the RAF frame
111 */
112int ess_raf_received_pack(struct s_smc *smc, SMbuf *mb, struct smt_header *sm,
113 int fs)
114{
115 void *p ; /* universal pointer */
116 struct smt_p_0016 *cmd ; /* para: command for the ESS */
117 SMbuf *db ;
118 u_long msg_res_type ; /* recource type */
119 u_long payload, overhead ;
120 int local ;
121 int i ;
122
123 /*
124 * Message Processing Code
125 */
126 local = ((fs & L_INDICATOR) != 0) ;
127
128 /*
129 * get the resource type
130 */
131 if (!(p = (void *) sm_to_para(smc,sm,SMT_P0015))) {
132 DB_ESS("ESS: RAF frame error, parameter type not found");
133 return fs;
134 }
135 msg_res_type = ((struct smt_p_0015 *)p)->res_type ;
136
137 /*
138 * get the pointer to the ESS command
139 */
140 if (!(cmd = (struct smt_p_0016 *) sm_to_para(smc,sm,SMT_P0016))) {
141 /*
142 * error in frame: para ESS command was not found
143 */
144 DB_ESS("ESS: RAF frame error, parameter command not found");
145 return fs;
146 }
147
148 DB_ESSN(2, "fc %x ft %x", sm->smt_class, sm->smt_type);
149 DB_ESSN(2, "ver %x tran %x", sm->smt_version, sm->smt_tid);
150 DB_ESSN(2, "stn_id %pM", &sm->smt_source);
151
152 DB_ESSN(2, "infolen %x res %lx", sm->smt_len, msg_res_type);
153 DB_ESSN(2, "sbacmd %x", cmd->sba_cmd);
154
155 /*
156 * evaluate the ESS command
157 */
158 switch (cmd->sba_cmd) {
159
160 /*
161 * Process an ESS Allocation Request
162 */
163 case REQUEST_ALLOCATION :
164 /*
165 * check for an RAF Request (Allocation Request)
166 */
167 if (sm->smt_type == SMT_REQUEST) {
168 /*
169 * process the Allocation request only if the frame is
170 * local and no static allocation is used
171 */
172 if (!local || smc->mib.fddiESSPayload)
173 return fs;
174
175 p = (void *) sm_to_para(smc,sm,SMT_P0019) ;
176 for (i = 0; i < 5; i++) {
177 if (((struct smt_p_0019 *)p)->alloc_addr.a[i]) {
178 return fs;
179 }
180 }
181
182 /*
183 * Note: The Application should send a LAN_LOC_FRAME.
184 * The ESS do not send the Frame to the network!
185 */
186 smc->ess.alloc_trans_id = sm->smt_tid ;
187 DB_ESS("ESS: save Alloc Req Trans ID %x", sm->smt_tid);
188 p = (void *) sm_to_para(smc,sm,SMT_P320F) ;
189 ((struct smt_p_320f *)p)->mib_payload =
190 smc->mib.a[PATH0].fddiPATHSbaPayload ;
191 p = (void *) sm_to_para(smc,sm,SMT_P3210) ;
192 ((struct smt_p_3210 *)p)->mib_overhead =
193 smc->mib.a[PATH0].fddiPATHSbaOverhead ;
194 sm->smt_dest = smt_sba_da ;
195
196 if (smc->ess.local_sba_active)
197 return fs | I_INDICATOR;
198
199 if (!(db = smt_get_mbuf(smc)))
200 return fs;
201
202 db->sm_len = mb->sm_len ;
203 db->sm_off = mb->sm_off ;
204 memcpy(((char *)(db->sm_data+db->sm_off)),(char *)sm,
205 (int)db->sm_len) ;
206 dump_smt(smc,
207 (struct smt_header *)(db->sm_data+db->sm_off),
208 "RAF") ;
209 smt_send_frame(smc,db,FC_SMT_INFO,0) ;
210 return fs;
211 }
212
213 /*
214 * The RAF frame is an Allocation Response !
215 * check the parameters
216 */
217 if (smt_check_para(smc,sm,plist_raf_alc_res)) {
218 DB_ESS("ESS: RAF with para problem, ignoring");
219 return fs;
220 }
221
222 /*
223 * VERIFY THE FRAME IS WELL BUILT:
224 *
225 * 1. path index = primary ring only
226 * 2. resource type = sync bw only
227 * 3. trans action id = alloc_trans_id
228 * 4. reason code = success
229 *
230 * If any are violated, discard the RAF frame
231 */
232 if ((((struct smt_p_320b *)sm_to_para(smc,sm,SMT_P320B))->path_index
233 != PRIMARY_RING) ||
234 (msg_res_type != SYNC_BW) ||
235 (((struct smt_p_reason *)sm_to_para(smc,sm,SMT_P0012))->rdf_reason
236 != SMT_RDF_SUCCESS) ||
237 (sm->smt_tid != smc->ess.alloc_trans_id)) {
238
239 DB_ESS("ESS: Allocation Response not accepted");
240 return fs;
241 }
242
243 /*
244 * Extract message parameters
245 */
246 p = (void *) sm_to_para(smc,sm,SMT_P320F) ;
247 if (!p) {
248 printk(KERN_ERR "ESS: sm_to_para failed");
249 return fs;
250 }
251 payload = ((struct smt_p_320f *)p)->mib_payload ;
252 p = (void *) sm_to_para(smc,sm,SMT_P3210) ;
253 if (!p) {
254 printk(KERN_ERR "ESS: sm_to_para failed");
255 return fs;
256 }
257 overhead = ((struct smt_p_3210 *)p)->mib_overhead ;
258
259 DB_ESSN(2, "payload= %lx overhead= %lx",
260 payload, overhead);
261
262 /*
263 * process the bandwidth allocation
264 */
265 (void)process_bw_alloc(smc,(long)payload,(long)overhead) ;
266
267 return fs;
268 /* end of Process Allocation Request */
269
270 /*
271 * Process an ESS Change Request
272 */
273 case CHANGE_ALLOCATION :
274 /*
275 * except only replies
276 */
277 if (sm->smt_type != SMT_REQUEST) {
278 DB_ESS("ESS: Do not process Change Responses");
279 return fs;
280 }
281
282 /*
283 * check the para for the Change Request
284 */
285 if (smt_check_para(smc,sm,plist_raf_chg_req)) {
286 DB_ESS("ESS: RAF with para problem, ignoring");
287 return fs;
288 }
289
290 /*
291 * Verify the path index and resource
292 * type are correct. If any of
293 * these are false, don't process this
294 * change request frame.
295 */
296 if ((((struct smt_p_320b *)sm_to_para(smc,sm,SMT_P320B))->path_index
297 != PRIMARY_RING) || (msg_res_type != SYNC_BW)) {
298 DB_ESS("ESS: RAF frame with para problem, ignoring");
299 return fs;
300 }
301
302 /*
303 * Extract message queue parameters
304 */
305 p = (void *) sm_to_para(smc,sm,SMT_P320F) ;
306 payload = ((struct smt_p_320f *)p)->mib_payload ;
307 p = (void *) sm_to_para(smc,sm,SMT_P3210) ;
308 overhead = ((struct smt_p_3210 *)p)->mib_overhead ;
309
310 DB_ESSN(2, "ESS: Change Request from %pM",
311 &sm->smt_source);
312 DB_ESSN(2, "payload= %lx overhead= %lx",
313 payload, overhead);
314
315 /*
316 * process the bandwidth allocation
317 */
318 if(!process_bw_alloc(smc,(long)payload,(long)overhead))
319 return fs;
320
321 /*
322 * send an RAF Change Reply
323 */
324 ess_send_response(smc,sm,CHANGE_ALLOCATION) ;
325
326 return fs;
327 /* end of Process Change Request */
328
329 /*
330 * Process Report Response
331 */
332 case REPORT_ALLOCATION :
333 /*
334 * except only requests
335 */
336 if (sm->smt_type != SMT_REQUEST) {
337 DB_ESS("ESS: Do not process a Report Reply");
338 return fs;
339 }
340
341 DB_ESSN(2, "ESS: Report Request from %pM",
342 &sm->smt_source);
343
344 /*
345 * verify that the resource type is sync bw only
346 */
347 if (msg_res_type != SYNC_BW) {
348 DB_ESS("ESS: ignoring RAF with para problem");
349 return fs;
350 }
351
352 /*
353 * send an RAF Change Reply
354 */
355 ess_send_response(smc,sm,REPORT_ALLOCATION) ;
356
357 return fs;
358 /* end of Process Report Request */
359
360 default:
361 /*
362 * error in frame
363 */
364 DB_ESS("ESS: ignoring RAF with bad sba_cmd");
365 break ;
366 }
367
368 return fs;
369}
370
371/*
372 * determines the synchronous bandwidth, set the TSYNC register and the
373 * mib variables SBAPayload, SBAOverhead and fddiMACT-NEG.
374 */
375static int process_bw_alloc(struct s_smc *smc, long int payload, long int overhead)
376{
377 /*
378 * determine the synchronous bandwidth (sync_bw) in bytes per T-NEG,
379 * if the payload is greater than zero.
380 * For the SBAPayload and the SBAOverhead we have the following
381 * unite quations
382 * _ _
383 * | bytes |
384 * SBAPayload = | 8000 ------ |
385 * | s |
386 * - -
387 * _ _
388 * | bytes |
389 * SBAOverhead = | ------ |
390 * | T-NEG |
391 * - -
392 *
393 * T-NEG is described by the equation:
394 *
395 * (-) fddiMACT-NEG
396 * T-NEG = -------------------
397 * 12500000 1/s
398 *
399 * The number of bytes we are able to send is the payload
400 * plus the overhead.
401 *
402 * bytes T-NEG SBAPayload 8000 bytes/s
403 * sync_bw = SBAOverhead ------ + -----------------------------
404 * T-NEG T-NEG
405 *
406 *
407 * 1
408 * sync_bw = SBAOverhead + ---- (-)fddiMACT-NEG * SBAPayload
409 * 1562
410 *
411 */
412
413 /*
414 * set the mib attributes fddiPATHSbaOverhead, fddiPATHSbaPayload
415 */
416/* if (smt_set_obj(smc,SMT_P320F,payload,S_SET)) {
417 DB_ESS("ESS: SMT does not accept the payload value");
418 return FALSE;
419 }
420 if (smt_set_obj(smc,SMT_P3210,overhead,S_SET)) {
421 DB_ESS("ESS: SMT does not accept the overhead value");
422 return FALSE;
423 } */
424
425 /* premliminary */
426 if (payload > MAX_PAYLOAD || overhead > 5000) {
427 DB_ESS("ESS: payload / overhead not accepted");
428 return FALSE;
429 }
430
431 /*
432 * start the iterative allocation process if the payload or the overhead
433 * are smaller than the parsed values
434 */
435 if (smc->mib.fddiESSPayload &&
436 ((u_long)payload != smc->mib.fddiESSPayload ||
437 (u_long)overhead != smc->mib.fddiESSOverhead)) {
438 smc->ess.raf_act_timer_poll = TRUE ;
439 smc->ess.timer_count = 0 ;
440 }
441
442 /*
443 * evulate the Payload
444 */
445 if (payload) {
446 DB_ESSN(2, "ESS: turn SMT_ST_SYNC_SERVICE bit on");
447 smc->ess.sync_bw_available = TRUE ;
448
449 smc->ess.sync_bw = overhead -
450 (long)smc->mib.m[MAC0].fddiMACT_Neg *
451 payload / 1562 ;
452 }
453 else {
454 DB_ESSN(2, "ESS: turn SMT_ST_SYNC_SERVICE bit off");
455 smc->ess.sync_bw_available = FALSE ;
456 smc->ess.sync_bw = 0 ;
457 overhead = 0 ;
458 }
459
460 smc->mib.a[PATH0].fddiPATHSbaPayload = payload ;
461 smc->mib.a[PATH0].fddiPATHSbaOverhead = overhead ;
462
463
464 DB_ESSN(2, "tsync = %lx", smc->ess.sync_bw);
465
466 ess_config_fifo(smc) ;
467 set_formac_tsync(smc,smc->ess.sync_bw) ;
468 return TRUE;
469}
470
471static void ess_send_response(struct s_smc *smc, struct smt_header *sm,
472 int sba_cmd)
473{
474 struct smt_sba_chg *chg ;
475 SMbuf *mb ;
476 void *p ;
477
478 /*
479 * get and initialize the response frame
480 */
481 if (sba_cmd == CHANGE_ALLOCATION) {
482 if (!(mb=smt_build_frame(smc,SMT_RAF,SMT_REPLY,
483 sizeof(struct smt_sba_chg))))
484 return ;
485 }
486 else {
487 if (!(mb=smt_build_frame(smc,SMT_RAF,SMT_REPLY,
488 sizeof(struct smt_sba_rep_res))))
489 return ;
490 }
491
492 chg = smtod(mb,struct smt_sba_chg *) ;
493 chg->smt.smt_tid = sm->smt_tid ;
494 chg->smt.smt_dest = sm->smt_source ;
495
496 /* set P15 */
497 chg->s_type.para.p_type = SMT_P0015 ;
498 chg->s_type.para.p_len = sizeof(struct smt_p_0015) - PARA_LEN ;
499 chg->s_type.res_type = SYNC_BW ;
500
501 /* set P16 */
502 chg->cmd.para.p_type = SMT_P0016 ;
503 chg->cmd.para.p_len = sizeof(struct smt_p_0016) - PARA_LEN ;
504 chg->cmd.sba_cmd = sba_cmd ;
505
506 /* set P320B */
507 chg->path.para.p_type = SMT_P320B ;
508 chg->path.para.p_len = sizeof(struct smt_p_320b) - PARA_LEN ;
509 chg->path.mib_index = SBAPATHINDEX ;
510 chg->path.path_pad = 0;
511 chg->path.path_index = PRIMARY_RING ;
512
513 /* set P320F */
514 chg->payload.para.p_type = SMT_P320F ;
515 chg->payload.para.p_len = sizeof(struct smt_p_320f) - PARA_LEN ;
516 chg->payload.mib_index = SBAPATHINDEX ;
517 chg->payload.mib_payload = smc->mib.a[PATH0].fddiPATHSbaPayload ;
518
519 /* set P3210 */
520 chg->overhead.para.p_type = SMT_P3210 ;
521 chg->overhead.para.p_len = sizeof(struct smt_p_3210) - PARA_LEN ;
522 chg->overhead.mib_index = SBAPATHINDEX ;
523 chg->overhead.mib_overhead = smc->mib.a[PATH0].fddiPATHSbaOverhead ;
524
525 if (sba_cmd == CHANGE_ALLOCATION) {
526 /* set P1A */
527 chg->cat.para.p_type = SMT_P001A ;
528 chg->cat.para.p_len = sizeof(struct smt_p_001a) - PARA_LEN ;
529 p = (void *) sm_to_para(smc,sm,SMT_P001A) ;
530 chg->cat.category = ((struct smt_p_001a *)p)->category ;
531 }
532 dump_smt(smc,(struct smt_header *)chg,"RAF") ;
533 ess_send_frame(smc,mb) ;
534}
535
536void ess_timer_poll(struct s_smc *smc)
537{
538 if (!smc->ess.raf_act_timer_poll)
539 return ;
540
541 DB_ESSN(2, "ESS: timer_poll");
542
543 smc->ess.timer_count++ ;
544 if (smc->ess.timer_count == 10) {
545 smc->ess.timer_count = 0 ;
546 ess_send_alc_req(smc) ;
547 }
548}
549
550static void ess_send_alc_req(struct s_smc *smc)
551{
552 struct smt_sba_alc_req *req ;
553 SMbuf *mb ;
554
555 /*
556 * send never allocation request where the requested payload and
557 * overhead is zero or deallocate bandwidth when no bandwidth is
558 * parsed
559 */
560 if (!smc->mib.fddiESSPayload) {
561 smc->mib.fddiESSOverhead = 0 ;
562 }
563 else {
564 if (!smc->mib.fddiESSOverhead)
565 smc->mib.fddiESSOverhead = DEFAULT_OV ;
566 }
567
568 if (smc->mib.fddiESSOverhead ==
569 smc->mib.a[PATH0].fddiPATHSbaOverhead &&
570 smc->mib.fddiESSPayload ==
571 smc->mib.a[PATH0].fddiPATHSbaPayload){
572 smc->ess.raf_act_timer_poll = FALSE ;
573 smc->ess.timer_count = 7 ; /* next RAF alc req after 3 s */
574 return ;
575 }
576
577 /*
578 * get and initialize the response frame
579 */
580 if (!(mb=smt_build_frame(smc,SMT_RAF,SMT_REQUEST,
581 sizeof(struct smt_sba_alc_req))))
582 return ;
583 req = smtod(mb,struct smt_sba_alc_req *) ;
584 req->smt.smt_tid = smc->ess.alloc_trans_id = smt_get_tid(smc) ;
585 req->smt.smt_dest = smt_sba_da ;
586
587 /* set P15 */
588 req->s_type.para.p_type = SMT_P0015 ;
589 req->s_type.para.p_len = sizeof(struct smt_p_0015) - PARA_LEN ;
590 req->s_type.res_type = SYNC_BW ;
591
592 /* set P16 */
593 req->cmd.para.p_type = SMT_P0016 ;
594 req->cmd.para.p_len = sizeof(struct smt_p_0016) - PARA_LEN ;
595 req->cmd.sba_cmd = REQUEST_ALLOCATION ;
596
597 /*
598 * set the parameter type and parameter length of all used
599 * parameters
600 */
601
602 /* set P320B */
603 req->path.para.p_type = SMT_P320B ;
604 req->path.para.p_len = sizeof(struct smt_p_320b) - PARA_LEN ;
605 req->path.mib_index = SBAPATHINDEX ;
606 req->path.path_pad = 0;
607 req->path.path_index = PRIMARY_RING ;
608
609 /* set P0017 */
610 req->pl_req.para.p_type = SMT_P0017 ;
611 req->pl_req.para.p_len = sizeof(struct smt_p_0017) - PARA_LEN ;
612 req->pl_req.sba_pl_req = smc->mib.fddiESSPayload -
613 smc->mib.a[PATH0].fddiPATHSbaPayload ;
614
615 /* set P0018 */
616 req->ov_req.para.p_type = SMT_P0018 ;
617 req->ov_req.para.p_len = sizeof(struct smt_p_0018) - PARA_LEN ;
618 req->ov_req.sba_ov_req = smc->mib.fddiESSOverhead -
619 smc->mib.a[PATH0].fddiPATHSbaOverhead ;
620
621 /* set P320F */
622 req->payload.para.p_type = SMT_P320F ;
623 req->payload.para.p_len = sizeof(struct smt_p_320f) - PARA_LEN ;
624 req->payload.mib_index = SBAPATHINDEX ;
625 req->payload.mib_payload = smc->mib.a[PATH0].fddiPATHSbaPayload ;
626
627 /* set P3210 */
628 req->overhead.para.p_type = SMT_P3210 ;
629 req->overhead.para.p_len = sizeof(struct smt_p_3210) - PARA_LEN ;
630 req->overhead.mib_index = SBAPATHINDEX ;
631 req->overhead.mib_overhead = smc->mib.a[PATH0].fddiPATHSbaOverhead ;
632
633 /* set P19 */
634 req->a_addr.para.p_type = SMT_P0019 ;
635 req->a_addr.para.p_len = sizeof(struct smt_p_0019) - PARA_LEN ;
636 req->a_addr.sba_pad = 0;
637 req->a_addr.alloc_addr = null_addr ;
638
639 /* set P1A */
640 req->cat.para.p_type = SMT_P001A ;
641 req->cat.para.p_len = sizeof(struct smt_p_001a) - PARA_LEN ;
642 req->cat.category = smc->mib.fddiESSCategory ;
643
644 /* set P1B */
645 req->tneg.para.p_type = SMT_P001B ;
646 req->tneg.para.p_len = sizeof(struct smt_p_001b) - PARA_LEN ;
647 req->tneg.max_t_neg = smc->mib.fddiESSMaxTNeg ;
648
649 /* set P1C */
650 req->segm.para.p_type = SMT_P001C ;
651 req->segm.para.p_len = sizeof(struct smt_p_001c) - PARA_LEN ;
652 req->segm.min_seg_siz = smc->mib.fddiESSMinSegmentSize ;
653
654 dump_smt(smc,(struct smt_header *)req,"RAF") ;
655 ess_send_frame(smc,mb) ;
656}
657
658static void ess_send_frame(struct s_smc *smc, SMbuf *mb)
659{
660 /*
661 * check if the frame must be send to the own ESS
662 */
663 if (smc->ess.local_sba_active) {
664 /*
665 * Send the Change Reply to the local SBA
666 */
667 DB_ESS("ESS:Send to the local SBA");
668 if (!smc->ess.sba_reply_pend)
669 smc->ess.sba_reply_pend = mb ;
670 else {
671 DB_ESS("Frame is lost - another frame was pending");
672 smt_free_mbuf(smc,mb) ;
673 }
674 }
675 else {
676 /*
677 * Send the SBA RAF Change Reply to the network
678 */
679 DB_ESS("ESS:Send to the network");
680 smt_send_frame(smc,mb,FC_SMT_INFO,0) ;
681 }
682}
683
684void ess_para_change(struct s_smc *smc)
685{
686 (void)process_bw_alloc(smc,(long)smc->mib.a[PATH0].fddiPATHSbaPayload,
687 (long)smc->mib.a[PATH0].fddiPATHSbaOverhead) ;
688}
689
690static void ess_config_fifo(struct s_smc *smc)
691{
692 /*
693 * if nothing to do exit
694 */
695 if (smc->mib.a[PATH0].fddiPATHSbaPayload) {
696 if (smc->hw.fp.fifo.fifo_config_mode & SYNC_TRAFFIC_ON &&
697 (smc->hw.fp.fifo.fifo_config_mode&SEND_ASYNC_AS_SYNC) ==
698 smc->mib.fddiESSSynchTxMode) {
699 return ;
700 }
701 }
702 else {
703 if (!(smc->hw.fp.fifo.fifo_config_mode & SYNC_TRAFFIC_ON)) {
704 return ;
705 }
706 }
707
708 /*
709 * split up the FIFO and reinitialize the queues
710 */
711 formac_reinit_tx(smc) ;
712}
713
714#endif /* ESS */
715
716#endif /* no SLIM_SMT */
717
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 * *******************************************************************
15 * This SBA code implements the Synchronous Bandwidth Allocation
16 * functions described in the "FDDI Synchronous Forum Implementer's
17 * Agreement" dated December 1th, 1993.
18 * *******************************************************************
19 *
20 * PURPOSE: The purpose of this function is to control
21 * synchronous allocations on a single FDDI segment.
22 * Allocations are limited to the primary FDDI ring.
23 * The SBM provides recovery mechanisms to recover
24 * unused bandwidth also resolves T_Neg and
25 * reconfiguration changes. Many of the SBM state
26 * machine inputs are sourced by the underlying
27 * FDDI sub-system supporting the SBA application.
28 *
29 * *******************************************************************
30 */
31
32#include "h/types.h"
33#include "h/fddi.h"
34#include "h/smc.h"
35#include "h/smt_p.h"
36
37
38#ifndef SLIM_SMT
39
40#ifdef ESS
41
42#ifndef lint
43static const char ID_sccs[] = "@(#)ess.c 1.10 96/02/23 (C) SK" ;
44#define LINT_USE(x)
45#else
46#define LINT_USE(x) (x)=(x)
47#endif
48#define MS2BCLK(x) ((x)*12500L)
49
50/*
51 -------------------------------------------------------------
52 LOCAL VARIABLES:
53 -------------------------------------------------------------
54*/
55
56static const u_short plist_raf_alc_res[] = { SMT_P0012, SMT_P320B, SMT_P320F,
57 SMT_P3210, SMT_P0019, SMT_P001A,
58 SMT_P001D, 0 } ;
59
60static const u_short plist_raf_chg_req[] = { SMT_P320B, SMT_P320F, SMT_P3210,
61 SMT_P001A, 0 } ;
62
63static const struct fddi_addr smt_sba_da = {{0x80,0x01,0x43,0x00,0x80,0x0C}} ;
64static const struct fddi_addr null_addr = {{0,0,0,0,0,0}} ;
65
66/*
67 -------------------------------------------------------------
68 GLOBAL VARIABLES:
69 -------------------------------------------------------------
70*/
71
72
73/*
74 -------------------------------------------------------------
75 LOCAL FUNCTIONS:
76 -------------------------------------------------------------
77*/
78
79static void ess_send_response(struct s_smc *smc, struct smt_header *sm,
80 int sba_cmd);
81static void ess_config_fifo(struct s_smc *smc);
82static void ess_send_alc_req(struct s_smc *smc);
83static void ess_send_frame(struct s_smc *smc, SMbuf *mb);
84
85/*
86 -------------------------------------------------------------
87 EXTERNAL FUNCTIONS:
88 -------------------------------------------------------------
89*/
90
91/*
92 -------------------------------------------------------------
93 PUBLIC FUNCTIONS:
94 -------------------------------------------------------------
95*/
96
97void ess_timer_poll(struct s_smc *smc);
98void ess_para_change(struct s_smc *smc);
99int ess_raf_received_pack(struct s_smc *smc, SMbuf *mb, struct smt_header *sm,
100 int fs);
101static int process_bw_alloc(struct s_smc *smc, long int payload, long int overhead);
102
103
104/*
105 * --------------------------------------------------------------------------
106 * End Station Support (ESS)
107 * --------------------------------------------------------------------------
108 */
109
110/*
111 * evaluate the RAF frame
112 */
113int ess_raf_received_pack(struct s_smc *smc, SMbuf *mb, struct smt_header *sm,
114 int fs)
115{
116 void *p ; /* universal pointer */
117 struct smt_p_0016 *cmd ; /* para: command for the ESS */
118 SMbuf *db ;
119 u_long msg_res_type ; /* recource type */
120 u_long payload, overhead ;
121 int local ;
122 int i ;
123
124 /*
125 * Message Processing Code
126 */
127 local = ((fs & L_INDICATOR) != 0) ;
128
129 /*
130 * get the resource type
131 */
132 if (!(p = (void *) sm_to_para(smc,sm,SMT_P0015))) {
133 DB_ESS("ESS: RAF frame error, parameter type not found");
134 return fs;
135 }
136 msg_res_type = ((struct smt_p_0015 *)p)->res_type ;
137
138 /*
139 * get the pointer to the ESS command
140 */
141 if (!(cmd = (struct smt_p_0016 *) sm_to_para(smc,sm,SMT_P0016))) {
142 /*
143 * error in frame: para ESS command was not found
144 */
145 DB_ESS("ESS: RAF frame error, parameter command not found");
146 return fs;
147 }
148
149 DB_ESSN(2, "fc %x ft %x", sm->smt_class, sm->smt_type);
150 DB_ESSN(2, "ver %x tran %x", sm->smt_version, sm->smt_tid);
151 DB_ESSN(2, "stn_id %s", addr_to_string(&sm->smt_source));
152
153 DB_ESSN(2, "infolen %x res %lx", sm->smt_len, msg_res_type);
154 DB_ESSN(2, "sbacmd %x", cmd->sba_cmd);
155
156 /*
157 * evaluate the ESS command
158 */
159 switch (cmd->sba_cmd) {
160
161 /*
162 * Process an ESS Allocation Request
163 */
164 case REQUEST_ALLOCATION :
165 /*
166 * check for an RAF Request (Allocation Request)
167 */
168 if (sm->smt_type == SMT_REQUEST) {
169 /*
170 * process the Allocation request only if the frame is
171 * local and no static allocation is used
172 */
173 if (!local || smc->mib.fddiESSPayload)
174 return fs;
175
176 p = (void *) sm_to_para(smc,sm,SMT_P0019) ;
177 for (i = 0; i < 5; i++) {
178 if (((struct smt_p_0019 *)p)->alloc_addr.a[i]) {
179 return fs;
180 }
181 }
182
183 /*
184 * Note: The Application should send a LAN_LOC_FRAME.
185 * The ESS do not send the Frame to the network!
186 */
187 smc->ess.alloc_trans_id = sm->smt_tid ;
188 DB_ESS("ESS: save Alloc Req Trans ID %x", sm->smt_tid);
189 p = (void *) sm_to_para(smc,sm,SMT_P320F) ;
190 ((struct smt_p_320f *)p)->mib_payload =
191 smc->mib.a[PATH0].fddiPATHSbaPayload ;
192 p = (void *) sm_to_para(smc,sm,SMT_P3210) ;
193 ((struct smt_p_3210 *)p)->mib_overhead =
194 smc->mib.a[PATH0].fddiPATHSbaOverhead ;
195 sm->smt_dest = smt_sba_da ;
196
197 if (smc->ess.local_sba_active)
198 return fs | I_INDICATOR;
199
200 if (!(db = smt_get_mbuf(smc)))
201 return fs;
202
203 db->sm_len = mb->sm_len ;
204 db->sm_off = mb->sm_off ;
205 memcpy(((char *)(db->sm_data+db->sm_off)),(char *)sm,
206 (int)db->sm_len) ;
207 dump_smt(smc,
208 (struct smt_header *)(db->sm_data+db->sm_off),
209 "RAF") ;
210 smt_send_frame(smc,db,FC_SMT_INFO,0) ;
211 return fs;
212 }
213
214 /*
215 * The RAF frame is an Allocation Response !
216 * check the parameters
217 */
218 if (smt_check_para(smc,sm,plist_raf_alc_res)) {
219 DB_ESS("ESS: RAF with para problem, ignoring");
220 return fs;
221 }
222
223 /*
224 * VERIFY THE FRAME IS WELL BUILT:
225 *
226 * 1. path index = primary ring only
227 * 2. resource type = sync bw only
228 * 3. trans action id = alloc_trans_id
229 * 4. reason code = success
230 *
231 * If any are violated, discard the RAF frame
232 */
233 if ((((struct smt_p_320b *)sm_to_para(smc,sm,SMT_P320B))->path_index
234 != PRIMARY_RING) ||
235 (msg_res_type != SYNC_BW) ||
236 (((struct smt_p_reason *)sm_to_para(smc,sm,SMT_P0012))->rdf_reason
237 != SMT_RDF_SUCCESS) ||
238 (sm->smt_tid != smc->ess.alloc_trans_id)) {
239
240 DB_ESS("ESS: Allocation Response not accepted");
241 return fs;
242 }
243
244 /*
245 * Extract message parameters
246 */
247 p = (void *) sm_to_para(smc,sm,SMT_P320F) ;
248 if (!p) {
249 printk(KERN_ERR "ESS: sm_to_para failed");
250 return fs;
251 }
252 payload = ((struct smt_p_320f *)p)->mib_payload ;
253 p = (void *) sm_to_para(smc,sm,SMT_P3210) ;
254 if (!p) {
255 printk(KERN_ERR "ESS: sm_to_para failed");
256 return fs;
257 }
258 overhead = ((struct smt_p_3210 *)p)->mib_overhead ;
259
260 DB_ESSN(2, "payload= %lx overhead= %lx",
261 payload, overhead);
262
263 /*
264 * process the bandwidth allocation
265 */
266 (void)process_bw_alloc(smc,(long)payload,(long)overhead) ;
267
268 return fs;
269 /* end of Process Allocation Request */
270
271 /*
272 * Process an ESS Change Request
273 */
274 case CHANGE_ALLOCATION :
275 /*
276 * except only replies
277 */
278 if (sm->smt_type != SMT_REQUEST) {
279 DB_ESS("ESS: Do not process Change Responses");
280 return fs;
281 }
282
283 /*
284 * check the para for the Change Request
285 */
286 if (smt_check_para(smc,sm,plist_raf_chg_req)) {
287 DB_ESS("ESS: RAF with para problem, ignoring");
288 return fs;
289 }
290
291 /*
292 * Verify the path index and resource
293 * type are correct. If any of
294 * these are false, don't process this
295 * change request frame.
296 */
297 if ((((struct smt_p_320b *)sm_to_para(smc,sm,SMT_P320B))->path_index
298 != PRIMARY_RING) || (msg_res_type != SYNC_BW)) {
299 DB_ESS("ESS: RAF frame with para problem, ignoring");
300 return fs;
301 }
302
303 /*
304 * Extract message queue parameters
305 */
306 p = (void *) sm_to_para(smc,sm,SMT_P320F) ;
307 payload = ((struct smt_p_320f *)p)->mib_payload ;
308 p = (void *) sm_to_para(smc,sm,SMT_P3210) ;
309 overhead = ((struct smt_p_3210 *)p)->mib_overhead ;
310
311 DB_ESSN(2, "ESS: Change Request from %s",
312 addr_to_string(&sm->smt_source));
313 DB_ESSN(2, "payload= %lx overhead= %lx",
314 payload, overhead);
315
316 /*
317 * process the bandwidth allocation
318 */
319 if(!process_bw_alloc(smc,(long)payload,(long)overhead))
320 return fs;
321
322 /*
323 * send an RAF Change Reply
324 */
325 ess_send_response(smc,sm,CHANGE_ALLOCATION) ;
326
327 return fs;
328 /* end of Process Change Request */
329
330 /*
331 * Process Report Response
332 */
333 case REPORT_ALLOCATION :
334 /*
335 * except only requests
336 */
337 if (sm->smt_type != SMT_REQUEST) {
338 DB_ESS("ESS: Do not process a Report Reply");
339 return fs;
340 }
341
342 DB_ESSN(2, "ESS: Report Request from %s",
343 addr_to_string(&sm->smt_source));
344
345 /*
346 * verify that the resource type is sync bw only
347 */
348 if (msg_res_type != SYNC_BW) {
349 DB_ESS("ESS: ignoring RAF with para problem");
350 return fs;
351 }
352
353 /*
354 * send an RAF Change Reply
355 */
356 ess_send_response(smc,sm,REPORT_ALLOCATION) ;
357
358 return fs;
359 /* end of Process Report Request */
360
361 default:
362 /*
363 * error in frame
364 */
365 DB_ESS("ESS: ignoring RAF with bad sba_cmd");
366 break ;
367 }
368
369 return fs;
370}
371
372/*
373 * determines the synchronous bandwidth, set the TSYNC register and the
374 * mib variables SBAPayload, SBAOverhead and fddiMACT-NEG.
375 */
376static int process_bw_alloc(struct s_smc *smc, long int payload, long int overhead)
377{
378 /*
379 * determine the synchronous bandwidth (sync_bw) in bytes per T-NEG,
380 * if the payload is greater than zero.
381 * For the SBAPayload and the SBAOverhead we have the following
382 * unite quations
383 * _ _
384 * | bytes |
385 * SBAPayload = | 8000 ------ |
386 * | s |
387 * - -
388 * _ _
389 * | bytes |
390 * SBAOverhead = | ------ |
391 * | T-NEG |
392 * - -
393 *
394 * T-NEG is described by the equation:
395 *
396 * (-) fddiMACT-NEG
397 * T-NEG = -------------------
398 * 12500000 1/s
399 *
400 * The number of bytes we are able to send is the payload
401 * plus the overhead.
402 *
403 * bytes T-NEG SBAPayload 8000 bytes/s
404 * sync_bw = SBAOverhead ------ + -----------------------------
405 * T-NEG T-NEG
406 *
407 *
408 * 1
409 * sync_bw = SBAOverhead + ---- (-)fddiMACT-NEG * SBAPayload
410 * 1562
411 *
412 */
413
414 /*
415 * set the mib attributes fddiPATHSbaOverhead, fddiPATHSbaPayload
416 */
417/* if (smt_set_obj(smc,SMT_P320F,payload,S_SET)) {
418 DB_ESS("ESS: SMT does not accept the payload value");
419 return FALSE;
420 }
421 if (smt_set_obj(smc,SMT_P3210,overhead,S_SET)) {
422 DB_ESS("ESS: SMT does not accept the overhead value");
423 return FALSE;
424 } */
425
426 /* premliminary */
427 if (payload > MAX_PAYLOAD || overhead > 5000) {
428 DB_ESS("ESS: payload / overhead not accepted");
429 return FALSE;
430 }
431
432 /*
433 * start the iterative allocation process if the payload or the overhead
434 * are smaller than the parsed values
435 */
436 if (smc->mib.fddiESSPayload &&
437 ((u_long)payload != smc->mib.fddiESSPayload ||
438 (u_long)overhead != smc->mib.fddiESSOverhead)) {
439 smc->ess.raf_act_timer_poll = TRUE ;
440 smc->ess.timer_count = 0 ;
441 }
442
443 /*
444 * evulate the Payload
445 */
446 if (payload) {
447 DB_ESSN(2, "ESS: turn SMT_ST_SYNC_SERVICE bit on");
448 smc->ess.sync_bw_available = TRUE ;
449
450 smc->ess.sync_bw = overhead -
451 (long)smc->mib.m[MAC0].fddiMACT_Neg *
452 payload / 1562 ;
453 }
454 else {
455 DB_ESSN(2, "ESS: turn SMT_ST_SYNC_SERVICE bit off");
456 smc->ess.sync_bw_available = FALSE ;
457 smc->ess.sync_bw = 0 ;
458 overhead = 0 ;
459 }
460
461 smc->mib.a[PATH0].fddiPATHSbaPayload = payload ;
462 smc->mib.a[PATH0].fddiPATHSbaOverhead = overhead ;
463
464
465 DB_ESSN(2, "tsync = %lx", smc->ess.sync_bw);
466
467 ess_config_fifo(smc) ;
468 set_formac_tsync(smc,smc->ess.sync_bw) ;
469 return TRUE;
470}
471
472static void ess_send_response(struct s_smc *smc, struct smt_header *sm,
473 int sba_cmd)
474{
475 struct smt_sba_chg *chg ;
476 SMbuf *mb ;
477 void *p ;
478
479 /*
480 * get and initialize the response frame
481 */
482 if (sba_cmd == CHANGE_ALLOCATION) {
483 if (!(mb=smt_build_frame(smc,SMT_RAF,SMT_REPLY,
484 sizeof(struct smt_sba_chg))))
485 return ;
486 }
487 else {
488 if (!(mb=smt_build_frame(smc,SMT_RAF,SMT_REPLY,
489 sizeof(struct smt_sba_rep_res))))
490 return ;
491 }
492
493 chg = smtod(mb,struct smt_sba_chg *) ;
494 chg->smt.smt_tid = sm->smt_tid ;
495 chg->smt.smt_dest = sm->smt_source ;
496
497 /* set P15 */
498 chg->s_type.para.p_type = SMT_P0015 ;
499 chg->s_type.para.p_len = sizeof(struct smt_p_0015) - PARA_LEN ;
500 chg->s_type.res_type = SYNC_BW ;
501
502 /* set P16 */
503 chg->cmd.para.p_type = SMT_P0016 ;
504 chg->cmd.para.p_len = sizeof(struct smt_p_0016) - PARA_LEN ;
505 chg->cmd.sba_cmd = sba_cmd ;
506
507 /* set P320B */
508 chg->path.para.p_type = SMT_P320B ;
509 chg->path.para.p_len = sizeof(struct smt_p_320b) - PARA_LEN ;
510 chg->path.mib_index = SBAPATHINDEX ;
511 chg->path.path_pad = 0;
512 chg->path.path_index = PRIMARY_RING ;
513
514 /* set P320F */
515 chg->payload.para.p_type = SMT_P320F ;
516 chg->payload.para.p_len = sizeof(struct smt_p_320f) - PARA_LEN ;
517 chg->payload.mib_index = SBAPATHINDEX ;
518 chg->payload.mib_payload = smc->mib.a[PATH0].fddiPATHSbaPayload ;
519
520 /* set P3210 */
521 chg->overhead.para.p_type = SMT_P3210 ;
522 chg->overhead.para.p_len = sizeof(struct smt_p_3210) - PARA_LEN ;
523 chg->overhead.mib_index = SBAPATHINDEX ;
524 chg->overhead.mib_overhead = smc->mib.a[PATH0].fddiPATHSbaOverhead ;
525
526 if (sba_cmd == CHANGE_ALLOCATION) {
527 /* set P1A */
528 chg->cat.para.p_type = SMT_P001A ;
529 chg->cat.para.p_len = sizeof(struct smt_p_001a) - PARA_LEN ;
530 p = (void *) sm_to_para(smc,sm,SMT_P001A) ;
531 chg->cat.category = ((struct smt_p_001a *)p)->category ;
532 }
533 dump_smt(smc,(struct smt_header *)chg,"RAF") ;
534 ess_send_frame(smc,mb) ;
535}
536
537void ess_timer_poll(struct s_smc *smc)
538{
539 if (!smc->ess.raf_act_timer_poll)
540 return ;
541
542 DB_ESSN(2, "ESS: timer_poll");
543
544 smc->ess.timer_count++ ;
545 if (smc->ess.timer_count == 10) {
546 smc->ess.timer_count = 0 ;
547 ess_send_alc_req(smc) ;
548 }
549}
550
551static void ess_send_alc_req(struct s_smc *smc)
552{
553 struct smt_sba_alc_req *req ;
554 SMbuf *mb ;
555
556 /*
557 * send never allocation request where the requested payload and
558 * overhead is zero or deallocate bandwidth when no bandwidth is
559 * parsed
560 */
561 if (!smc->mib.fddiESSPayload) {
562 smc->mib.fddiESSOverhead = 0 ;
563 }
564 else {
565 if (!smc->mib.fddiESSOverhead)
566 smc->mib.fddiESSOverhead = DEFAULT_OV ;
567 }
568
569 if (smc->mib.fddiESSOverhead ==
570 smc->mib.a[PATH0].fddiPATHSbaOverhead &&
571 smc->mib.fddiESSPayload ==
572 smc->mib.a[PATH0].fddiPATHSbaPayload){
573 smc->ess.raf_act_timer_poll = FALSE ;
574 smc->ess.timer_count = 7 ; /* next RAF alc req after 3 s */
575 return ;
576 }
577
578 /*
579 * get and initialize the response frame
580 */
581 if (!(mb=smt_build_frame(smc,SMT_RAF,SMT_REQUEST,
582 sizeof(struct smt_sba_alc_req))))
583 return ;
584 req = smtod(mb,struct smt_sba_alc_req *) ;
585 req->smt.smt_tid = smc->ess.alloc_trans_id = smt_get_tid(smc) ;
586 req->smt.smt_dest = smt_sba_da ;
587
588 /* set P15 */
589 req->s_type.para.p_type = SMT_P0015 ;
590 req->s_type.para.p_len = sizeof(struct smt_p_0015) - PARA_LEN ;
591 req->s_type.res_type = SYNC_BW ;
592
593 /* set P16 */
594 req->cmd.para.p_type = SMT_P0016 ;
595 req->cmd.para.p_len = sizeof(struct smt_p_0016) - PARA_LEN ;
596 req->cmd.sba_cmd = REQUEST_ALLOCATION ;
597
598 /*
599 * set the parameter type and parameter length of all used
600 * parameters
601 */
602
603 /* set P320B */
604 req->path.para.p_type = SMT_P320B ;
605 req->path.para.p_len = sizeof(struct smt_p_320b) - PARA_LEN ;
606 req->path.mib_index = SBAPATHINDEX ;
607 req->path.path_pad = 0;
608 req->path.path_index = PRIMARY_RING ;
609
610 /* set P0017 */
611 req->pl_req.para.p_type = SMT_P0017 ;
612 req->pl_req.para.p_len = sizeof(struct smt_p_0017) - PARA_LEN ;
613 req->pl_req.sba_pl_req = smc->mib.fddiESSPayload -
614 smc->mib.a[PATH0].fddiPATHSbaPayload ;
615
616 /* set P0018 */
617 req->ov_req.para.p_type = SMT_P0018 ;
618 req->ov_req.para.p_len = sizeof(struct smt_p_0018) - PARA_LEN ;
619 req->ov_req.sba_ov_req = smc->mib.fddiESSOverhead -
620 smc->mib.a[PATH0].fddiPATHSbaOverhead ;
621
622 /* set P320F */
623 req->payload.para.p_type = SMT_P320F ;
624 req->payload.para.p_len = sizeof(struct smt_p_320f) - PARA_LEN ;
625 req->payload.mib_index = SBAPATHINDEX ;
626 req->payload.mib_payload = smc->mib.a[PATH0].fddiPATHSbaPayload ;
627
628 /* set P3210 */
629 req->overhead.para.p_type = SMT_P3210 ;
630 req->overhead.para.p_len = sizeof(struct smt_p_3210) - PARA_LEN ;
631 req->overhead.mib_index = SBAPATHINDEX ;
632 req->overhead.mib_overhead = smc->mib.a[PATH0].fddiPATHSbaOverhead ;
633
634 /* set P19 */
635 req->a_addr.para.p_type = SMT_P0019 ;
636 req->a_addr.para.p_len = sizeof(struct smt_p_0019) - PARA_LEN ;
637 req->a_addr.sba_pad = 0;
638 req->a_addr.alloc_addr = null_addr ;
639
640 /* set P1A */
641 req->cat.para.p_type = SMT_P001A ;
642 req->cat.para.p_len = sizeof(struct smt_p_001a) - PARA_LEN ;
643 req->cat.category = smc->mib.fddiESSCategory ;
644
645 /* set P1B */
646 req->tneg.para.p_type = SMT_P001B ;
647 req->tneg.para.p_len = sizeof(struct smt_p_001b) - PARA_LEN ;
648 req->tneg.max_t_neg = smc->mib.fddiESSMaxTNeg ;
649
650 /* set P1C */
651 req->segm.para.p_type = SMT_P001C ;
652 req->segm.para.p_len = sizeof(struct smt_p_001c) - PARA_LEN ;
653 req->segm.min_seg_siz = smc->mib.fddiESSMinSegmentSize ;
654
655 dump_smt(smc,(struct smt_header *)req,"RAF") ;
656 ess_send_frame(smc,mb) ;
657}
658
659static void ess_send_frame(struct s_smc *smc, SMbuf *mb)
660{
661 /*
662 * check if the frame must be send to the own ESS
663 */
664 if (smc->ess.local_sba_active) {
665 /*
666 * Send the Change Reply to the local SBA
667 */
668 DB_ESS("ESS:Send to the local SBA");
669 if (!smc->ess.sba_reply_pend)
670 smc->ess.sba_reply_pend = mb ;
671 else {
672 DB_ESS("Frame is lost - another frame was pending");
673 smt_free_mbuf(smc,mb) ;
674 }
675 }
676 else {
677 /*
678 * Send the SBA RAF Change Reply to the network
679 */
680 DB_ESS("ESS:Send to the network");
681 smt_send_frame(smc,mb,FC_SMT_INFO,0) ;
682 }
683}
684
685void ess_para_change(struct s_smc *smc)
686{
687 (void)process_bw_alloc(smc,(long)smc->mib.a[PATH0].fddiPATHSbaPayload,
688 (long)smc->mib.a[PATH0].fddiPATHSbaOverhead) ;
689}
690
691static void ess_config_fifo(struct s_smc *smc)
692{
693 /*
694 * if nothing to do exit
695 */
696 if (smc->mib.a[PATH0].fddiPATHSbaPayload) {
697 if (smc->hw.fp.fifo.fifo_config_mode & SYNC_TRAFFIC_ON &&
698 (smc->hw.fp.fifo.fifo_config_mode&SEND_ASYNC_AS_SYNC) ==
699 smc->mib.fddiESSSynchTxMode) {
700 return ;
701 }
702 }
703 else {
704 if (!(smc->hw.fp.fifo.fifo_config_mode & SYNC_TRAFFIC_ON)) {
705 return ;
706 }
707 }
708
709 /*
710 * split up the FIFO and reinitialize the queues
711 */
712 formac_reinit_tx(smc) ;
713}
714
715#endif /* ESS */
716
717#endif /* no SLIM_SMT */
718