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x86/mm/pat: Don't report PAT on CPUs that don't support it
[linux/fpc-iii.git] / drivers / net / fddi / skfp / srf.c
blob4e286c1ba9cd2d58f1bc1a42d027bb8c6b7dc1af
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 SMT 7.2 Status Response Frame Implementation
19 SRF state machine and frame generation
20 */
21
22 #include "h/types.h"
23 #include "h/fddi.h"
24 #include "h/smc.h"
25 #include "h/smt_p.h"
26
27 #define KERNEL
28 #include "h/smtstate.h"
29
30 #ifndef SLIM_SMT
31 #ifndef BOOT
32
33 #ifndef lint
34 static const char ID_sccs[] = "@(#)srf.c 1.18 97/08/04 (C) SK " ;
35 #endif
36
37
38 /*
39 * function declarations
40 */
41 static void clear_all_rep(struct s_smc *smc);
42 static void clear_reported(struct s_smc *smc);
43 static void smt_send_srf(struct s_smc *smc);
44 static struct s_srf_evc *smt_get_evc(struct s_smc *smc, int code, int index);
45
46 #define MAX_EVCS ARRAY_SIZE(smc->evcs)
47
48 struct evc_init {
49 u_char code ;
50 u_char index ;
51 u_char n ;
52 u_short para ;
53 } ;
54
55 static const struct evc_init evc_inits[] = {
56 { SMT_COND_SMT_PEER_WRAP, 0,1,SMT_P1048 } ,
57
58 { SMT_COND_MAC_DUP_ADDR, INDEX_MAC, NUMMACS,SMT_P208C } ,
59 { SMT_COND_MAC_FRAME_ERROR, INDEX_MAC, NUMMACS,SMT_P208D } ,
60 { SMT_COND_MAC_NOT_COPIED, INDEX_MAC, NUMMACS,SMT_P208E } ,
61 { SMT_EVENT_MAC_NEIGHBOR_CHANGE, INDEX_MAC, NUMMACS,SMT_P208F } ,
62 { SMT_EVENT_MAC_PATH_CHANGE, INDEX_MAC, NUMMACS,SMT_P2090 } ,
63
64 { SMT_COND_PORT_LER, INDEX_PORT,NUMPHYS,SMT_P4050 } ,
65 { SMT_COND_PORT_EB_ERROR, INDEX_PORT,NUMPHYS,SMT_P4052 } ,
66 { SMT_EVENT_PORT_CONNECTION, INDEX_PORT,NUMPHYS,SMT_P4051 } ,
67 { SMT_EVENT_PORT_PATH_CHANGE, INDEX_PORT,NUMPHYS,SMT_P4053 } ,
68 } ;
69
70 #define MAX_INIT_EVC ARRAY_SIZE(evc_inits)
71
72 void smt_init_evc(struct s_smc *smc)
73 {
74 struct s_srf_evc *evc ;
75 const struct evc_init *init ;
76 unsigned int i ;
77 int index ;
78 int offset ;
79
80 static u_char fail_safe = FALSE ;
81
82 memset((char *)smc->evcs,0,sizeof(smc->evcs)) ;
83
84 evc = smc->evcs ;
85 init = evc_inits ;
86
87 for (i = 0 ; i < MAX_INIT_EVC ; i++) {
88 for (index = 0 ; index < init->n ; index++) {
89 evc->evc_code = init->code ;
90 evc->evc_para = init->para ;
91 evc->evc_index = init->index + index ;
92 #ifndef DEBUG
93 evc->evc_multiple = &fail_safe ;
94 evc->evc_cond_state = &fail_safe ;
95 #endif
96 evc++ ;
97 }
98 init++ ;
99 }
100
101 if ((unsigned int) (evc - smc->evcs) > MAX_EVCS) {
102 SMT_PANIC(smc,SMT_E0127, SMT_E0127_MSG) ;
103 }
104
105 /*
106 * conditions
107 */
108 smc->evcs[0].evc_cond_state = &smc->mib.fddiSMTPeerWrapFlag ;
109 smc->evcs[1].evc_cond_state =
110 &smc->mib.m[MAC0].fddiMACDuplicateAddressCond ;
111 smc->evcs[2].evc_cond_state =
112 &smc->mib.m[MAC0].fddiMACFrameErrorFlag ;
113 smc->evcs[3].evc_cond_state =
114 &smc->mib.m[MAC0].fddiMACNotCopiedFlag ;
115
116 /*
117 * events
118 */
119 smc->evcs[4].evc_multiple = &smc->mib.m[MAC0].fddiMACMultiple_N ;
120 smc->evcs[5].evc_multiple = &smc->mib.m[MAC0].fddiMACMultiple_P ;
121
122 offset = 6 ;
123 for (i = 0 ; i < NUMPHYS ; i++) {
124 /*
125 * conditions
126 */
127 smc->evcs[offset + 0*NUMPHYS].evc_cond_state =
128 &smc->mib.p[i].fddiPORTLerFlag ;
129 smc->evcs[offset + 1*NUMPHYS].evc_cond_state =
130 &smc->mib.p[i].fddiPORTEB_Condition ;
131
132 /*
133 * events
134 */
135 smc->evcs[offset + 2*NUMPHYS].evc_multiple =
136 &smc->mib.p[i].fddiPORTMultiple_U ;
137 smc->evcs[offset + 3*NUMPHYS].evc_multiple =
138 &smc->mib.p[i].fddiPORTMultiple_P ;
139 offset++ ;
140 }
141 #ifdef DEBUG
142 for (i = 0, evc = smc->evcs ; i < MAX_EVCS ; i++, evc++) {
143 if (SMT_IS_CONDITION(evc->evc_code)) {
144 if (!evc->evc_cond_state) {
145 SMT_PANIC(smc,SMT_E0128, SMT_E0128_MSG) ;
146 }
147 evc->evc_multiple = &fail_safe ;
148 }
149 else {
150 if (!evc->evc_multiple) {
151 SMT_PANIC(smc,SMT_E0129, SMT_E0129_MSG) ;
152 }
153 evc->evc_cond_state = &fail_safe ;
154 }
155 }
156 #endif
157 smc->srf.TSR = smt_get_time() ;
158 smc->srf.sr_state = SR0_WAIT ;
159 }
160
161 static struct s_srf_evc *smt_get_evc(struct s_smc *smc, int code, int index)
162 {
163 unsigned int i ;
164 struct s_srf_evc *evc ;
165
166 for (i = 0, evc = smc->evcs ; i < MAX_EVCS ; i++, evc++) {
167 if (evc->evc_code == code && evc->evc_index == index)
168 return evc;
169 }
170 return NULL;
171 }
172
173 #define THRESHOLD_2 (2*TICKS_PER_SECOND)
174 #define THRESHOLD_32 (32*TICKS_PER_SECOND)
175
176 static const char * const srf_names[] = {
177 "None","MACPathChangeEvent", "MACNeighborChangeEvent",
178 "PORTPathChangeEvent", "PORTUndesiredConnectionAttemptEvent",
179 "SMTPeerWrapCondition", "SMTHoldCondition",
180 "MACFrameErrorCondition", "MACDuplicateAddressCondition",
181 "MACNotCopiedCondition", "PORTEBErrorCondition",
182 "PORTLerCondition"
183 } ;
184
185 void smt_srf_event(struct s_smc *smc, int code, int index, int cond)
186 {
187 struct s_srf_evc *evc ;
188 int cond_asserted = 0 ;
189 int cond_deasserted = 0 ;
190 int event_occurred = 0 ;
191 int tsr ;
192 int T_Limit = 2*TICKS_PER_SECOND ;
193
194 if (code == SMT_COND_MAC_DUP_ADDR && cond) {
195 RS_SET(smc,RS_DUPADDR) ;
196 }
197
198 if (code) {
199 DB_SMT("SRF: %s index %d", srf_names[code], index);
200
201 if (!(evc = smt_get_evc(smc,code,index))) {
202 DB_SMT("SRF : smt_get_evc() failed");
203 return ;
204 }
205 /*
206 * ignore condition if no change
207 */
208 if (SMT_IS_CONDITION(code)) {
209 if (*evc->evc_cond_state == cond)
210 return ;
211 }
212
213 /*
214 * set transition time stamp
215 */
216 smt_set_timestamp(smc,smc->mib.fddiSMTTransitionTimeStamp) ;
217 if (SMT_IS_CONDITION(code)) {
218 DB_SMT("SRF: condition is %s", cond ? "ON" : "OFF");
219 if (cond) {
220 *evc->evc_cond_state = TRUE ;
221 evc->evc_rep_required = TRUE ;
222 smc->srf.any_report = TRUE ;
223 cond_asserted = TRUE ;
224 }
225 else {
226 *evc->evc_cond_state = FALSE ;
227 cond_deasserted = TRUE ;
228 }
229 }
230 else {
231 if (evc->evc_rep_required) {
232 *evc->evc_multiple = TRUE ;
233 }
234 else {
235 evc->evc_rep_required = TRUE ;
236 *evc->evc_multiple = FALSE ;
237 }
238 smc->srf.any_report = TRUE ;
239 event_occurred = TRUE ;
240 }
241 #ifdef FDDI_MIB
242 snmp_srf_event(smc,evc) ;
243 #endif /* FDDI_MIB */
244 }
245 tsr = smt_get_time() - smc->srf.TSR ;
246
247 switch (smc->srf.sr_state) {
248 case SR0_WAIT :
249 /* SR01a */
250 if (cond_asserted && tsr < T_Limit) {
251 smc->srf.SRThreshold = THRESHOLD_2 ;
252 smc->srf.sr_state = SR1_HOLDOFF ;
253 break ;
254 }
255 /* SR01b */
256 if (cond_deasserted && tsr < T_Limit) {
257 smc->srf.sr_state = SR1_HOLDOFF ;
258 break ;
259 }
260 /* SR01c */
261 if (event_occurred && tsr < T_Limit) {
262 smc->srf.sr_state = SR1_HOLDOFF ;
263 break ;
264 }
265 /* SR00b */
266 if (cond_asserted && tsr >= T_Limit) {
267 smc->srf.SRThreshold = THRESHOLD_2 ;
268 smc->srf.TSR = smt_get_time() ;
269 smt_send_srf(smc) ;
270 break ;
271 }
272 /* SR00c */
273 if (cond_deasserted && tsr >= T_Limit) {
274 smc->srf.TSR = smt_get_time() ;
275 smt_send_srf(smc) ;
276 break ;
277 }
278 /* SR00d */
279 if (event_occurred && tsr >= T_Limit) {
280 smc->srf.TSR = smt_get_time() ;
281 smt_send_srf(smc) ;
282 break ;
283 }
284 /* SR00e */
285 if (smc->srf.any_report && (u_long) tsr >=
286 smc->srf.SRThreshold) {
287 smc->srf.SRThreshold *= 2 ;
288 if (smc->srf.SRThreshold > THRESHOLD_32)
289 smc->srf.SRThreshold = THRESHOLD_32 ;
290 smc->srf.TSR = smt_get_time() ;
291 smt_send_srf(smc) ;
292 break ;
293 }
294 /* SR02 */
295 if (!smc->mib.fddiSMTStatRptPolicy) {
296 smc->srf.sr_state = SR2_DISABLED ;
297 break ;
298 }
299 break ;
300 case SR1_HOLDOFF :
301 /* SR10b */
302 if (tsr >= T_Limit) {
303 smc->srf.sr_state = SR0_WAIT ;
304 smc->srf.TSR = smt_get_time() ;
305 smt_send_srf(smc) ;
306 break ;
307 }
308 /* SR11a */
309 if (cond_asserted) {
310 smc->srf.SRThreshold = THRESHOLD_2 ;
311 }
312 /* SR11b */
313 /* SR11c */
314 /* handled above */
315 /* SR12 */
316 if (!smc->mib.fddiSMTStatRptPolicy) {
317 smc->srf.sr_state = SR2_DISABLED ;
318 break ;
319 }
320 break ;
321 case SR2_DISABLED :
322 if (smc->mib.fddiSMTStatRptPolicy) {
323 smc->srf.sr_state = SR0_WAIT ;
324 smc->srf.TSR = smt_get_time() ;
325 smc->srf.SRThreshold = THRESHOLD_2 ;
326 clear_all_rep(smc) ;
327 break ;
328 }
329 break ;
330 }
331 }
332
333 static void clear_all_rep(struct s_smc *smc)
334 {
335 struct s_srf_evc *evc ;
336 unsigned int i ;
337
338 for (i = 0, evc = smc->evcs ; i < MAX_EVCS ; i++, evc++) {
339 evc->evc_rep_required = FALSE ;
340 if (SMT_IS_CONDITION(evc->evc_code))
341 *evc->evc_cond_state = FALSE ;
342 }
343 smc->srf.any_report = FALSE ;
344 }
345
346 static void clear_reported(struct s_smc *smc)
347 {
348 struct s_srf_evc *evc ;
349 unsigned int i ;
350
351 smc->srf.any_report = FALSE ;
352 for (i = 0, evc = smc->evcs ; i < MAX_EVCS ; i++, evc++) {
353 if (SMT_IS_CONDITION(evc->evc_code)) {
354 if (*evc->evc_cond_state == FALSE)
355 evc->evc_rep_required = FALSE ;
356 else
357 smc->srf.any_report = TRUE ;
358 }
359 else {
360 evc->evc_rep_required = FALSE ;
361 *evc->evc_multiple = FALSE ;
362 }
363 }
364 }
365
366 /*
367 * build and send SMT SRF frame
368 */
369 static void smt_send_srf(struct s_smc *smc)
370 {
371
372 struct smt_header *smt ;
373 struct s_srf_evc *evc ;
374 SK_LOC_DECL(struct s_pcon,pcon) ;
375 SMbuf *mb ;
376 unsigned int i ;
377
378 static const struct fddi_addr SMT_SRF_DA = {
379 { 0x80, 0x01, 0x43, 0x00, 0x80, 0x08 }
380 } ;
381
382 /*
383 * build SMT header
384 */
385 if (!smc->r.sm_ma_avail)
386 return ;
387 if (!(mb = smt_build_frame(smc,SMT_SRF,SMT_ANNOUNCE,0)))
388 return ;
389
390 RS_SET(smc,RS_SOFTERROR) ;
391
392 smt = smtod(mb, struct smt_header *) ;
393 smt->smt_dest = SMT_SRF_DA ; /* DA == SRF multicast */
394
395 /*
396 * setup parameter status
397 */
398 pcon.pc_len = SMT_MAX_INFO_LEN ; /* max para length */
399 pcon.pc_err = 0 ; /* no error */
400 pcon.pc_badset = 0 ; /* no bad set count */
401 pcon.pc_p = (void *) (smt + 1) ; /* paras start here */
402
403 smt_add_para(smc,&pcon,(u_short) SMT_P1033,0,0) ;
404 smt_add_para(smc,&pcon,(u_short) SMT_P1034,0,0) ;
405
406 for (i = 0, evc = smc->evcs ; i < MAX_EVCS ; i++, evc++) {
407 if (evc->evc_rep_required) {
408 smt_add_para(smc,&pcon,evc->evc_para,
409 (int)evc->evc_index,0) ;
410 }
411 }
412 smt->smt_len = SMT_MAX_INFO_LEN - pcon.pc_len ;
413 mb->sm_len = smt->smt_len + sizeof(struct smt_header) ;
414
415 DB_SMT("SRF: sending SRF at %p, len %d", smt, mb->sm_len);
416 DB_SMT("SRF: state SR%d Threshold %lu",
417 smc->srf.sr_state, smc->srf.SRThreshold / TICKS_PER_SECOND);
418 #ifdef DEBUG
419 dump_smt(smc,smt,"SRF Send") ;
420 #endif
421 smt_send_frame(smc,mb,FC_SMT_INFO,0) ;
422 clear_reported(smc) ;
423 }
424
425 #endif /* no BOOT */
426 #endif /* no SLIM_SMT */
427
Linux with added FPC-III support