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1da177e4 LT |
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); | |
7aa55fce | 105 | static int process_bw_alloc(struct s_smc *smc, long int payload, long int overhead); |
1da177e4 LT |
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 | */ | |
7aa55fce | 378 | static int process_bw_alloc(struct s_smc *smc, long int payload, long int overhead) |
1da177e4 LT |
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 ; | |
c22ce6d8 | 513 | chg->path.path_pad = 0; |
1da177e4 LT |
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 | /* | |
efad798b | 601 | * set the parameter type and parameter length of all used |
1da177e4 LT |
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 ; | |
c22ce6d8 | 609 | req->path.path_pad = 0; |
1da177e4 LT |
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 ; | |
c22ce6d8 | 639 | req->a_addr.sba_pad = 0; |
1da177e4 LT |
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 |