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[XFRM]: skb_cow_data() does not set proper owner for new skbs.
[linux-2.6/verdex.git] / drivers / net / skfp / ess.c
blobfd39b4b2ef7da93caae56bc36691be161b9eaf5b
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(struct s_smc *smc, struct smt_header *sm,
84 int sba_cmd);
85 static void ess_config_fifo(struct s_smc *smc);
86 static void ess_send_alc_req(struct s_smc *smc);
87 static void ess_send_frame(struct s_smc *smc, SMbuf *mb);
88
89 /*
90 -------------------------------------------------------------
91 EXTERNAL FUNCTIONS:
92 -------------------------------------------------------------
93 */
94
95 /*
96 -------------------------------------------------------------
97 PUBLIC FUNCTIONS:
98 -------------------------------------------------------------
99 */
100
101 void ess_timer_poll(struct s_smc *smc);
102 void ess_para_change(struct s_smc *smc);
103 int ess_raf_received_pack(struct s_smc *smc, SMbuf *mb, struct smt_header *sm,
104 int fs);
105 int process_bw_alloc(struct s_smc *smc, long int payload, long int overhead);
106
107
108 /*
109 * --------------------------------------------------------------------------
110 * End Station Support (ESS)
111 * --------------------------------------------------------------------------
112 */
113
114 /*
115 * evaluate the RAF frame
116 */
117 int ess_raf_received_pack(struct s_smc *smc, SMbuf *mb, struct smt_header *sm,
118 int fs)
119 {
120 void *p ; /* universal pointer */
121 struct smt_p_0016 *cmd ; /* para: command for the ESS */
122 SMbuf *db ;
123 u_long msg_res_type ; /* recource type */
124 u_long payload, overhead ;
125 int local ;
126 int i ;
127
128 /*
129 * Message Processing Code
130 */
131 local = ((fs & L_INDICATOR) != 0) ;
132
133 /*
134 * get the resource type
135 */
136 if (!(p = (void *) sm_to_para(smc,sm,SMT_P0015))) {
137 DB_ESS("ESS: RAF frame error, parameter type not found\n",0,0) ;
138 return(fs) ;
139 }
140 msg_res_type = ((struct smt_p_0015 *)p)->res_type ;
141
142 /*
143 * get the pointer to the ESS command
144 */
145 if (!(cmd = (struct smt_p_0016 *) sm_to_para(smc,sm,SMT_P0016))) {
146 /*
147 * error in frame: para ESS command was not found
148 */
149 DB_ESS("ESS: RAF frame error, parameter command not found\n",0,0);
150 return(fs) ;
151 }
152
153 DB_ESSN(2,"fc %x ft %x\n",sm->smt_class,sm->smt_type) ;
154 DB_ESSN(2,"ver %x tran %lx\n",sm->smt_version,sm->smt_tid) ;
155 DB_ESSN(2,"stn_id %s\n",addr_to_string(&sm->smt_source),0) ;
156
157 DB_ESSN(2,"infolen %x res %x\n",sm->smt_len, msg_res_type) ;
158 DB_ESSN(2,"sbacmd %x\n",cmd->sba_cmd,0) ;
159
160 /*
161 * evaluate the ESS command
162 */
163 switch (cmd->sba_cmd) {
164
165 /*
166 * Process an ESS Allocation Request
167 */
168 case REQUEST_ALLOCATION :
169 /*
170 * check for an RAF Request (Allocation Request)
171 */
172 if (sm->smt_type == SMT_REQUEST) {
173 /*
174 * process the Allocation request only if the frame is
175 * local and no static allocation is used
176 */
177 if (!local || smc->mib.fddiESSPayload)
178 return(fs) ;
179
180 p = (void *) sm_to_para(smc,sm,SMT_P0019) ;
181 for (i = 0; i < 5; i++) {
182 if (((struct smt_p_0019 *)p)->alloc_addr.a[i]) {
183 return(fs) ;
184 }
185 }
186
187 /*
188 * Note: The Application should send a LAN_LOC_FRAME.
189 * The ESS do not send the Frame to the network!
190 */
191 smc->ess.alloc_trans_id = sm->smt_tid ;
192 DB_ESS("ESS: save Alloc Req Trans ID %lx\n",sm->smt_tid,0);
193 p = (void *) sm_to_para(smc,sm,SMT_P320F) ;
194 ((struct smt_p_320f *)p)->mib_payload =
195 smc->mib.a[PATH0].fddiPATHSbaPayload ;
196 p = (void *) sm_to_para(smc,sm,SMT_P3210) ;
197 ((struct smt_p_3210 *)p)->mib_overhead =
198 smc->mib.a[PATH0].fddiPATHSbaOverhead ;
199 sm->smt_dest = smt_sba_da ;
200
201 if (smc->ess.local_sba_active)
202 return(fs | I_INDICATOR) ;
203
204 if (!(db = smt_get_mbuf(smc)))
205 return(fs) ;
206
207 db->sm_len = mb->sm_len ;
208 db->sm_off = mb->sm_off ;
209 memcpy(((char *)(db->sm_data+db->sm_off)),(char *)sm,
210 (int)db->sm_len) ;
211 dump_smt(smc,
212 (struct smt_header *)(db->sm_data+db->sm_off),
213 "RAF") ;
214 smt_send_frame(smc,db,FC_SMT_INFO,0) ;
215 return(fs) ;
216 }
217
218 /*
219 * The RAF frame is an Allocation Response !
220 * check the parameters
221 */
222 if (smt_check_para(smc,sm,plist_raf_alc_res)) {
223 DB_ESS("ESS: RAF with para problem, ignoring\n",0,0) ;
224 return(fs) ;
225 }
226
227 /*
228 * VERIFY THE FRAME IS WELL BUILT:
229 *
230 * 1. path index = primary ring only
231 * 2. resource type = sync bw only
232 * 3. trans action id = alloc_trans_id
233 * 4. reason code = success
234 *
235 * If any are violated, discard the RAF frame
236 */
237 if ((((struct smt_p_320b *)sm_to_para(smc,sm,SMT_P320B))->path_index
238 != PRIMARY_RING) ||
239 (msg_res_type != SYNC_BW) ||
240 (((struct smt_p_reason *)sm_to_para(smc,sm,SMT_P0012))->rdf_reason
241 != SMT_RDF_SUCCESS) ||
242 (sm->smt_tid != smc->ess.alloc_trans_id)) {
243
244 DB_ESS("ESS: Allocation Responce not accepted\n",0,0) ;
245 return(fs) ;
246 }
247
248 /*
249 * Extract message parameters
250 */
251 p = (void *) sm_to_para(smc,sm,SMT_P320F) ;
252 if (!p) {
253 printk(KERN_ERR "ESS: sm_to_para failed");
254 return fs;
255 }
256 payload = ((struct smt_p_320f *)p)->mib_payload ;
257 p = (void *) sm_to_para(smc,sm,SMT_P3210) ;
258 if (!p) {
259 printk(KERN_ERR "ESS: sm_to_para failed");
260 return fs;
261 }
262 overhead = ((struct smt_p_3210 *)p)->mib_overhead ;
263
264 DB_ESSN(2,"payload= %lx overhead= %lx\n",payload,overhead) ;
265
266 /*
267 * process the bandwidth allocation
268 */
269 (void)process_bw_alloc(smc,(long)payload,(long)overhead) ;
270
271 return(fs) ;
272 /* end of Process Allocation Request */
273
274 /*
275 * Process an ESS Change Request
276 */
277 case CHANGE_ALLOCATION :
278 /*
279 * except only replies
280 */
281 if (sm->smt_type != SMT_REQUEST) {
282 DB_ESS("ESS: Do not process Change Responses\n",0,0) ;
283 return(fs) ;
284 }
285
286 /*
287 * check the para for the Change Request
288 */
289 if (smt_check_para(smc,sm,plist_raf_chg_req)) {
290 DB_ESS("ESS: RAF with para problem, ignoring\n",0,0) ;
291 return(fs) ;
292 }
293
294 /*
295 * Verify the path index and resource
296 * type are correct. If any of
297 * these are false, don't process this
298 * change request frame.
299 */
300 if ((((struct smt_p_320b *)sm_to_para(smc,sm,SMT_P320B))->path_index
301 != PRIMARY_RING) || (msg_res_type != SYNC_BW)) {
302 DB_ESS("ESS: RAF frame with para problem, ignoring\n",0,0) ;
303 return(fs) ;
304 }
305
306 /*
307 * Extract message queue parameters
308 */
309 p = (void *) sm_to_para(smc,sm,SMT_P320F) ;
310 payload = ((struct smt_p_320f *)p)->mib_payload ;
311 p = (void *) sm_to_para(smc,sm,SMT_P3210) ;
312 overhead = ((struct smt_p_3210 *)p)->mib_overhead ;
313
314 DB_ESSN(2,"ESS: Change Request from %s\n",
315 addr_to_string(&sm->smt_source),0) ;
316 DB_ESSN(2,"payload= %lx overhead= %lx\n",payload,overhead) ;
317
318 /*
319 * process the bandwidth allocation
320 */
321 if(!process_bw_alloc(smc,(long)payload,(long)overhead))
322 return(fs) ;
323
324 /*
325 * send an RAF Change Reply
326 */
327 ess_send_response(smc,sm,CHANGE_ALLOCATION) ;
328
329 return(fs) ;
330 /* end of Process Change Request */
331
332 /*
333 * Process Report Response
334 */
335 case REPORT_ALLOCATION :
336 /*
337 * except only requests
338 */
339 if (sm->smt_type != SMT_REQUEST) {
340 DB_ESS("ESS: Do not process a Report Reply\n",0,0) ;
341 return(fs) ;
342 }
343
344 DB_ESSN(2,"ESS: Report Request from %s\n",
345 addr_to_string(&(sm->smt_source)),0) ;
346
347 /*
348 * verify that the resource type is sync bw only
349 */
350 if (msg_res_type != SYNC_BW) {
351 DB_ESS("ESS: ignoring RAF with para problem\n",0,0) ;
352 return(fs) ;
353 }
354
355 /*
356 * send an RAF Change Reply
357 */
358 ess_send_response(smc,sm,REPORT_ALLOCATION) ;
359
360 return(fs) ;
361 /* end of Process Report Request */
362
363 default:
364 /*
365 * error in frame
366 */
367 DB_ESS("ESS: ignoring RAF with bad sba_cmd\n",0,0) ;
368 break ;
369 }
370
371 return(fs) ;
372 }
373
374 /*
375 * determines the synchronous bandwidth, set the TSYNC register and the
376 * mib variables SBAPayload, SBAOverhead and fddiMACT-NEG.
377 */
378 int process_bw_alloc(struct s_smc *smc, long int payload, long int overhead)
379 {
380 /*
381 * determine the synchronous bandwidth (sync_bw) in bytes per T-NEG,
382 * if the payload is greater than zero.
383 * For the SBAPayload and the SBAOverhead we have the following
384 * unite quations
385 * _ _
386 * | bytes |
387 * SBAPayload = | 8000 ------ |
388 * | s |
389 * - -
390 * _ _
391 * | bytes |
392 * SBAOverhead = | ------ |
393 * | T-NEG |
394 * - -
395 *
396 * T-NEG is discribed by the equation:
397 *
398 * (-) fddiMACT-NEG
399 * T-NEG = -------------------
400 * 12500000 1/s
401 *
402 * The number of bytes we are able to send is the payload
403 * plus the overhead.
404 *
405 * bytes T-NEG SBAPayload 8000 bytes/s
406 * sync_bw = SBAOverhead ------ + -----------------------------
407 * T-NEG T-NEG
408 *
409 *
410 * 1
411 * sync_bw = SBAOverhead + ---- (-)fddiMACT-NEG * SBAPayload
412 * 1562
413 *
414 */
415
416 /*
417 * set the mib attributes fddiPATHSbaOverhead, fddiPATHSbaPayload
418 */
419 /* if (smt_set_obj(smc,SMT_P320F,payload,S_SET)) {
420 DB_ESS("ESS: SMT does not accept the payload value\n",0,0) ;
421 return(FALSE) ;
422 }
423 if (smt_set_obj(smc,SMT_P3210,overhead,S_SET)) {
424 DB_ESS("ESS: SMT does not accept the overhead value\n",0,0) ;
425 return(FALSE) ;
426 } */
427
428 /* premliminary */
429 if (payload > MAX_PAYLOAD || overhead > 5000) {
430 DB_ESS("ESS: payload / overhead not accepted\n",0,0) ;
431 return(FALSE) ;
432 }
433
434 /*
435 * start the iterative allocation process if the payload or the overhead
436 * are smaller than the parsed values
437 */
438 if (smc->mib.fddiESSPayload &&
439 ((u_long)payload != smc->mib.fddiESSPayload ||
440 (u_long)overhead != smc->mib.fddiESSOverhead)) {
441 smc->ess.raf_act_timer_poll = TRUE ;
442 smc->ess.timer_count = 0 ;
443 }
444
445 /*
446 * evulate the Payload
447 */
448 if (payload) {
449 DB_ESSN(2,"ESS: turn SMT_ST_SYNC_SERVICE bit on\n",0,0) ;
450 smc->ess.sync_bw_available = TRUE ;
451
452 smc->ess.sync_bw = overhead -
453 (long)smc->mib.m[MAC0].fddiMACT_Neg *
454 payload / 1562 ;
455 }
456 else {
457 DB_ESSN(2,"ESS: turn SMT_ST_SYNC_SERVICE bit off\n",0,0) ;
458 smc->ess.sync_bw_available = FALSE ;
459 smc->ess.sync_bw = 0 ;
460 overhead = 0 ;
461 }
462
463 smc->mib.a[PATH0].fddiPATHSbaPayload = payload ;
464 smc->mib.a[PATH0].fddiPATHSbaOverhead = overhead ;
465
466
467 DB_ESSN(2,"tsync = %lx\n",smc->ess.sync_bw,0) ;
468
469 ess_config_fifo(smc) ;
470 set_formac_tsync(smc,smc->ess.sync_bw) ;
471 return(TRUE) ;
472 }
473
474 static void ess_send_response(struct s_smc *smc, struct smt_header *sm,
475 int sba_cmd)
476 {
477 struct smt_sba_chg *chg ;
478 SMbuf *mb ;
479 void *p ;
480
481 /*
482 * get and initialize the responce frame
483 */
484 if (sba_cmd == CHANGE_ALLOCATION) {
485 if (!(mb=smt_build_frame(smc,SMT_RAF,SMT_REPLY,
486 sizeof(struct smt_sba_chg))))
487 return ;
488 }
489 else {
490 if (!(mb=smt_build_frame(smc,SMT_RAF,SMT_REPLY,
491 sizeof(struct smt_sba_rep_res))))
492 return ;
493 }
494
495 chg = smtod(mb,struct smt_sba_chg *) ;
496 chg->smt.smt_tid = sm->smt_tid ;
497 chg->smt.smt_dest = sm->smt_source ;
498
499 /* set P15 */
500 chg->s_type.para.p_type = SMT_P0015 ;
501 chg->s_type.para.p_len = sizeof(struct smt_p_0015) - PARA_LEN ;
502 chg->s_type.res_type = SYNC_BW ;
503
504 /* set P16 */
505 chg->cmd.para.p_type = SMT_P0016 ;
506 chg->cmd.para.p_len = sizeof(struct smt_p_0016) - PARA_LEN ;
507 chg->cmd.sba_cmd = sba_cmd ;
508
509 /* set P320B */
510 chg->path.para.p_type = SMT_P320B ;
511 chg->path.para.p_len = sizeof(struct smt_p_320b) - PARA_LEN ;
512 chg->path.mib_index = SBAPATHINDEX ;
513 chg->path.path_pad = (u_short)NULL ;
514 chg->path.path_index = PRIMARY_RING ;
515
516 /* set P320F */
517 chg->payload.para.p_type = SMT_P320F ;
518 chg->payload.para.p_len = sizeof(struct smt_p_320f) - PARA_LEN ;
519 chg->payload.mib_index = SBAPATHINDEX ;
520 chg->payload.mib_payload = smc->mib.a[PATH0].fddiPATHSbaPayload ;
521
522 /* set P3210 */
523 chg->overhead.para.p_type = SMT_P3210 ;
524 chg->overhead.para.p_len = sizeof(struct smt_p_3210) - PARA_LEN ;
525 chg->overhead.mib_index = SBAPATHINDEX ;
526 chg->overhead.mib_overhead = smc->mib.a[PATH0].fddiPATHSbaOverhead ;
527
528 if (sba_cmd == CHANGE_ALLOCATION) {
529 /* set P1A */
530 chg->cat.para.p_type = SMT_P001A ;
531 chg->cat.para.p_len = sizeof(struct smt_p_001a) - PARA_LEN ;
532 p = (void *) sm_to_para(smc,sm,SMT_P001A) ;
533 chg->cat.category = ((struct smt_p_001a *)p)->category ;
534 }
535 dump_smt(smc,(struct smt_header *)chg,"RAF") ;
536 ess_send_frame(smc,mb) ;
537 }
538
539 void ess_timer_poll(struct s_smc *smc)
540 {
541 if (!smc->ess.raf_act_timer_poll)
542 return ;
543
544 DB_ESSN(2,"ESS: timer_poll\n",0,0) ;
545
546 smc->ess.timer_count++ ;
547 if (smc->ess.timer_count == 10) {
548 smc->ess.timer_count = 0 ;
549 ess_send_alc_req(smc) ;
550 }
551 }
552
553 static void ess_send_alc_req(struct s_smc *smc)
554 {
555 struct smt_sba_alc_req *req ;
556 SMbuf *mb ;
557
558 /*
559 * send never allocation request where the requested payload and
560 * overhead is zero or deallocate bandwidht when no bandwidth is
561 * parsed
562 */
563 if (!smc->mib.fddiESSPayload) {
564 smc->mib.fddiESSOverhead = 0 ;
565 }
566 else {
567 if (!smc->mib.fddiESSOverhead)
568 smc->mib.fddiESSOverhead = DEFAULT_OV ;
569 }
570
571 if (smc->mib.fddiESSOverhead ==
572 smc->mib.a[PATH0].fddiPATHSbaOverhead &&
573 smc->mib.fddiESSPayload ==
574 smc->mib.a[PATH0].fddiPATHSbaPayload){
575 smc->ess.raf_act_timer_poll = FALSE ;
576 smc->ess.timer_count = 7 ; /* next RAF alc req after 3 s */
577 return ;
578 }
579
580 /*
581 * get and initialize the responce frame
582 */
583 if (!(mb=smt_build_frame(smc,SMT_RAF,SMT_REQUEST,
584 sizeof(struct smt_sba_alc_req))))
585 return ;
586 req = smtod(mb,struct smt_sba_alc_req *) ;
587 req->smt.smt_tid = smc->ess.alloc_trans_id = smt_get_tid(smc) ;
588 req->smt.smt_dest = smt_sba_da ;
589
590 /* set P15 */
591 req->s_type.para.p_type = SMT_P0015 ;
592 req->s_type.para.p_len = sizeof(struct smt_p_0015) - PARA_LEN ;
593 req->s_type.res_type = SYNC_BW ;
594
595 /* set P16 */
596 req->cmd.para.p_type = SMT_P0016 ;
597 req->cmd.para.p_len = sizeof(struct smt_p_0016) - PARA_LEN ;
598 req->cmd.sba_cmd = REQUEST_ALLOCATION ;
599
600 /*
601 * set the parameter type and parameter lenght of all used
602 * parameters
603 */
604
605 /* set P320B */
606 req->path.para.p_type = SMT_P320B ;
607 req->path.para.p_len = sizeof(struct smt_p_320b) - PARA_LEN ;
608 req->path.mib_index = SBAPATHINDEX ;
609 req->path.path_pad = (u_short)NULL ;
610 req->path.path_index = PRIMARY_RING ;
611
612 /* set P0017 */
613 req->pl_req.para.p_type = SMT_P0017 ;
614 req->pl_req.para.p_len = sizeof(struct smt_p_0017) - PARA_LEN ;
615 req->pl_req.sba_pl_req = smc->mib.fddiESSPayload -
616 smc->mib.a[PATH0].fddiPATHSbaPayload ;
617
618 /* set P0018 */
619 req->ov_req.para.p_type = SMT_P0018 ;
620 req->ov_req.para.p_len = sizeof(struct smt_p_0018) - PARA_LEN ;
621 req->ov_req.sba_ov_req = smc->mib.fddiESSOverhead -
622 smc->mib.a[PATH0].fddiPATHSbaOverhead ;
623
624 /* set P320F */
625 req->payload.para.p_type = SMT_P320F ;
626 req->payload.para.p_len = sizeof(struct smt_p_320f) - PARA_LEN ;
627 req->payload.mib_index = SBAPATHINDEX ;
628 req->payload.mib_payload = smc->mib.a[PATH0].fddiPATHSbaPayload ;
629
630 /* set P3210 */
631 req->overhead.para.p_type = SMT_P3210 ;
632 req->overhead.para.p_len = sizeof(struct smt_p_3210) - PARA_LEN ;
633 req->overhead.mib_index = SBAPATHINDEX ;
634 req->overhead.mib_overhead = smc->mib.a[PATH0].fddiPATHSbaOverhead ;
635
636 /* set P19 */
637 req->a_addr.para.p_type = SMT_P0019 ;
638 req->a_addr.para.p_len = sizeof(struct smt_p_0019) - PARA_LEN ;
639 req->a_addr.sba_pad = (u_short)NULL ;
640 req->a_addr.alloc_addr = null_addr ;
641
642 /* set P1A */
643 req->cat.para.p_type = SMT_P001A ;
644 req->cat.para.p_len = sizeof(struct smt_p_001a) - PARA_LEN ;
645 req->cat.category = smc->mib.fddiESSCategory ;
646
647 /* set P1B */
648 req->tneg.para.p_type = SMT_P001B ;
649 req->tneg.para.p_len = sizeof(struct smt_p_001b) - PARA_LEN ;
650 req->tneg.max_t_neg = smc->mib.fddiESSMaxTNeg ;
651
652 /* set P1C */
653 req->segm.para.p_type = SMT_P001C ;
654 req->segm.para.p_len = sizeof(struct smt_p_001c) - PARA_LEN ;
655 req->segm.min_seg_siz = smc->mib.fddiESSMinSegmentSize ;
656
657 dump_smt(smc,(struct smt_header *)req,"RAF") ;
658 ess_send_frame(smc,mb) ;
659 }
660
661 static void ess_send_frame(struct s_smc *smc, SMbuf *mb)
662 {
663 /*
664 * check if the frame must be send to the own ESS
665 */
666 if (smc->ess.local_sba_active) {
667 /*
668 * Send the Change Reply to the local SBA
669 */
670 DB_ESS("ESS:Send to the local SBA\n",0,0) ;
671 if (!smc->ess.sba_reply_pend)
672 smc->ess.sba_reply_pend = mb ;
673 else {
674 DB_ESS("Frame is lost - another frame was pending\n",0,0);
675 smt_free_mbuf(smc,mb) ;
676 }
677 }
678 else {
679 /*
680 * Send the SBA RAF Change Reply to the network
681 */
682 DB_ESS("ESS:Send to the network\n",0,0) ;
683 smt_send_frame(smc,mb,FC_SMT_INFO,0) ;
684 }
685 }
686
687 void ess_para_change(struct s_smc *smc)
688 {
689 (void)process_bw_alloc(smc,(long)smc->mib.a[PATH0].fddiPATHSbaPayload,
690 (long)smc->mib.a[PATH0].fddiPATHSbaOverhead) ;
691 }
692
693 static void ess_config_fifo(struct s_smc *smc)
694 {
695 /*
696 * if nothing to do exit
697 */
698 if (smc->mib.a[PATH0].fddiPATHSbaPayload) {
699 if (smc->hw.fp.fifo.fifo_config_mode & SYNC_TRAFFIC_ON &&
700 (smc->hw.fp.fifo.fifo_config_mode&SEND_ASYNC_AS_SYNC) ==
701 smc->mib.fddiESSSynchTxMode) {
702 return ;
703 }
704 }
705 else {
706 if (!(smc->hw.fp.fifo.fifo_config_mode & SYNC_TRAFFIC_ON)) {
707 return ;
708 }
709 }
710
711 /*
712 * split up the FIFO and reinitialize the queues
713 */
714 formac_reinit_tx(smc) ;
715 }
716
717 #endif /* ESS */
718
719 #endif /* no SLIM_SMT */
720
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