diff options
Diffstat (limited to 'drivers/net/fddi/skfp/srf.c')
| -rw-r--r-- | drivers/net/fddi/skfp/srf.c | 418 |
1 files changed, 418 insertions, 0 deletions
diff --git a/drivers/net/fddi/skfp/srf.c b/drivers/net/fddi/skfp/srf.c new file mode 100644 index 000000000..4cad68c3f --- /dev/null +++ b/drivers/net/fddi/skfp/srf.c @@ -0,0 +1,418 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/****************************************************************************** + * + * (C)Copyright 1998,1999 SysKonnect, + * a business unit of Schneider & Koch & Co. Datensysteme GmbH. + * + * See the file "skfddi.c" for further information. + * + * The information in this file is provided "AS IS" without warranty. + * + ******************************************************************************/ + +/* + SMT 7.2 Status Response Frame Implementation + SRF state machine and frame generation +*/ + +#include "h/types.h" +#include "h/fddi.h" +#include "h/smc.h" +#include "h/smt_p.h" + +#define KERNEL +#include "h/smtstate.h" + +#ifndef SLIM_SMT +#ifndef BOOT + +/* + * function declarations + */ +static void clear_all_rep(struct s_smc *smc); +static void clear_reported(struct s_smc *smc); +static void smt_send_srf(struct s_smc *smc); +static struct s_srf_evc *smt_get_evc(struct s_smc *smc, int code, int index); + +#define MAX_EVCS ARRAY_SIZE(smc->evcs) + +struct evc_init { + u_char code ; + u_char index ; + u_char n ; + u_short para ; +} ; + +static const struct evc_init evc_inits[] = { + { SMT_COND_SMT_PEER_WRAP, 0,1,SMT_P1048 } , + + { SMT_COND_MAC_DUP_ADDR, INDEX_MAC, NUMMACS,SMT_P208C } , + { SMT_COND_MAC_FRAME_ERROR, INDEX_MAC, NUMMACS,SMT_P208D } , + { SMT_COND_MAC_NOT_COPIED, INDEX_MAC, NUMMACS,SMT_P208E } , + { SMT_EVENT_MAC_NEIGHBOR_CHANGE, INDEX_MAC, NUMMACS,SMT_P208F } , + { SMT_EVENT_MAC_PATH_CHANGE, INDEX_MAC, NUMMACS,SMT_P2090 } , + + { SMT_COND_PORT_LER, INDEX_PORT,NUMPHYS,SMT_P4050 } , + { SMT_COND_PORT_EB_ERROR, INDEX_PORT,NUMPHYS,SMT_P4052 } , + { SMT_EVENT_PORT_CONNECTION, INDEX_PORT,NUMPHYS,SMT_P4051 } , + { SMT_EVENT_PORT_PATH_CHANGE, INDEX_PORT,NUMPHYS,SMT_P4053 } , +} ; + +#define MAX_INIT_EVC ARRAY_SIZE(evc_inits) + +void smt_init_evc(struct s_smc *smc) +{ + struct s_srf_evc *evc ; + const struct evc_init *init ; + unsigned int i ; + int index ; + int offset ; + + static u_char fail_safe = FALSE ; + + memset((char *)smc->evcs,0,sizeof(smc->evcs)) ; + + evc = smc->evcs ; + init = evc_inits ; + + for (i = 0 ; i < MAX_INIT_EVC ; i++) { + for (index = 0 ; index < init->n ; index++) { + evc->evc_code = init->code ; + evc->evc_para = init->para ; + evc->evc_index = init->index + index ; +#ifndef DEBUG + evc->evc_multiple = &fail_safe ; + evc->evc_cond_state = &fail_safe ; +#endif + evc++ ; + } + init++ ; + } + + if ((unsigned int) (evc - smc->evcs) > MAX_EVCS) { + SMT_PANIC(smc,SMT_E0127, SMT_E0127_MSG) ; + } + + /* + * conditions + */ + smc->evcs[0].evc_cond_state = &smc->mib.fddiSMTPeerWrapFlag ; + smc->evcs[1].evc_cond_state = + &smc->mib.m[MAC0].fddiMACDuplicateAddressCond ; + smc->evcs[2].evc_cond_state = + &smc->mib.m[MAC0].fddiMACFrameErrorFlag ; + smc->evcs[3].evc_cond_state = + &smc->mib.m[MAC0].fddiMACNotCopiedFlag ; + + /* + * events + */ + smc->evcs[4].evc_multiple = &smc->mib.m[MAC0].fddiMACMultiple_N ; + smc->evcs[5].evc_multiple = &smc->mib.m[MAC0].fddiMACMultiple_P ; + + offset = 6 ; + for (i = 0 ; i < NUMPHYS ; i++) { + /* + * conditions + */ + smc->evcs[offset + 0*NUMPHYS].evc_cond_state = + &smc->mib.p[i].fddiPORTLerFlag ; + smc->evcs[offset + 1*NUMPHYS].evc_cond_state = + &smc->mib.p[i].fddiPORTEB_Condition ; + + /* + * events + */ + smc->evcs[offset + 2*NUMPHYS].evc_multiple = + &smc->mib.p[i].fddiPORTMultiple_U ; + smc->evcs[offset + 3*NUMPHYS].evc_multiple = + &smc->mib.p[i].fddiPORTMultiple_P ; + offset++ ; + } +#ifdef DEBUG + for (i = 0, evc = smc->evcs ; i < MAX_EVCS ; i++, evc++) { + if (SMT_IS_CONDITION(evc->evc_code)) { + if (!evc->evc_cond_state) { + SMT_PANIC(smc,SMT_E0128, SMT_E0128_MSG) ; + } + evc->evc_multiple = &fail_safe ; + } + else { + if (!evc->evc_multiple) { + SMT_PANIC(smc,SMT_E0129, SMT_E0129_MSG) ; + } + evc->evc_cond_state = &fail_safe ; + } + } +#endif + smc->srf.TSR = smt_get_time() ; + smc->srf.sr_state = SR0_WAIT ; +} + +static struct s_srf_evc *smt_get_evc(struct s_smc *smc, int code, int index) +{ + unsigned int i ; + struct s_srf_evc *evc ; + + for (i = 0, evc = smc->evcs ; i < MAX_EVCS ; i++, evc++) { + if (evc->evc_code == code && evc->evc_index == index) + return evc; + } + return NULL; +} + +#define THRESHOLD_2 (2*TICKS_PER_SECOND) +#define THRESHOLD_32 (32*TICKS_PER_SECOND) + +static const char * const srf_names[] = { + "None","MACPathChangeEvent", "MACNeighborChangeEvent", + "PORTPathChangeEvent", "PORTUndesiredConnectionAttemptEvent", + "SMTPeerWrapCondition", "SMTHoldCondition", + "MACFrameErrorCondition", "MACDuplicateAddressCondition", + "MACNotCopiedCondition", "PORTEBErrorCondition", + "PORTLerCondition" +} ; + +void smt_srf_event(struct s_smc *smc, int code, int index, int cond) +{ + struct s_srf_evc *evc ; + int cond_asserted = 0 ; + int cond_deasserted = 0 ; + int event_occurred = 0 ; + int tsr ; + int T_Limit = 2*TICKS_PER_SECOND ; + + if (code == SMT_COND_MAC_DUP_ADDR && cond) { + RS_SET(smc,RS_DUPADDR) ; + } + + if (code) { + DB_SMT("SRF: %s index %d", srf_names[code], index); + + if (!(evc = smt_get_evc(smc,code,index))) { + DB_SMT("SRF : smt_get_evc() failed"); + return ; + } + /* + * ignore condition if no change + */ + if (SMT_IS_CONDITION(code)) { + if (*evc->evc_cond_state == cond) + return ; + } + + /* + * set transition time stamp + */ + smt_set_timestamp(smc,smc->mib.fddiSMTTransitionTimeStamp) ; + if (SMT_IS_CONDITION(code)) { + DB_SMT("SRF: condition is %s", cond ? "ON" : "OFF"); + if (cond) { + *evc->evc_cond_state = TRUE ; + evc->evc_rep_required = TRUE ; + smc->srf.any_report = TRUE ; + cond_asserted = TRUE ; + } + else { + *evc->evc_cond_state = FALSE ; + cond_deasserted = TRUE ; + } + } + else { + if (evc->evc_rep_required) { + *evc->evc_multiple = TRUE ; + } + else { + evc->evc_rep_required = TRUE ; + *evc->evc_multiple = FALSE ; + } + smc->srf.any_report = TRUE ; + event_occurred = TRUE ; + } +#ifdef FDDI_MIB + snmp_srf_event(smc,evc) ; +#endif /* FDDI_MIB */ + } + tsr = smt_get_time() - smc->srf.TSR ; + + switch (smc->srf.sr_state) { + case SR0_WAIT : + /* SR01a */ + if (cond_asserted && tsr < T_Limit) { + smc->srf.SRThreshold = THRESHOLD_2 ; + smc->srf.sr_state = SR1_HOLDOFF ; + break ; + } + /* SR01b */ + if (cond_deasserted && tsr < T_Limit) { + smc->srf.sr_state = SR1_HOLDOFF ; + break ; + } + /* SR01c */ + if (event_occurred && tsr < T_Limit) { + smc->srf.sr_state = SR1_HOLDOFF ; + break ; + } + /* SR00b */ + if (cond_asserted && tsr >= T_Limit) { + smc->srf.SRThreshold = THRESHOLD_2 ; + smc->srf.TSR = smt_get_time() ; + smt_send_srf(smc) ; + break ; + } + /* SR00c */ + if (cond_deasserted && tsr >= T_Limit) { + smc->srf.TSR = smt_get_time() ; + smt_send_srf(smc) ; + break ; + } + /* SR00d */ + if (event_occurred && tsr >= T_Limit) { + smc->srf.TSR = smt_get_time() ; + smt_send_srf(smc) ; + break ; + } + /* SR00e */ + if (smc->srf.any_report && (u_long) tsr >= + smc->srf.SRThreshold) { + smc->srf.SRThreshold *= 2 ; + if (smc->srf.SRThreshold > THRESHOLD_32) + smc->srf.SRThreshold = THRESHOLD_32 ; + smc->srf.TSR = smt_get_time() ; + smt_send_srf(smc) ; + break ; + } + /* SR02 */ + if (!smc->mib.fddiSMTStatRptPolicy) { + smc->srf.sr_state = SR2_DISABLED ; + break ; + } + break ; + case SR1_HOLDOFF : + /* SR10b */ + if (tsr >= T_Limit) { + smc->srf.sr_state = SR0_WAIT ; + smc->srf.TSR = smt_get_time() ; + smt_send_srf(smc) ; + break ; + } + /* SR11a */ + if (cond_asserted) { + smc->srf.SRThreshold = THRESHOLD_2 ; + } + /* SR11b */ + /* SR11c */ + /* handled above */ + /* SR12 */ + if (!smc->mib.fddiSMTStatRptPolicy) { + smc->srf.sr_state = SR2_DISABLED ; + break ; + } + break ; + case SR2_DISABLED : + if (smc->mib.fddiSMTStatRptPolicy) { + smc->srf.sr_state = SR0_WAIT ; + smc->srf.TSR = smt_get_time() ; + smc->srf.SRThreshold = THRESHOLD_2 ; + clear_all_rep(smc) ; + break ; + } + break ; + } +} + +static void clear_all_rep(struct s_smc *smc) +{ + struct s_srf_evc *evc ; + unsigned int i ; + + for (i = 0, evc = smc->evcs ; i < MAX_EVCS ; i++, evc++) { + evc->evc_rep_required = FALSE ; + if (SMT_IS_CONDITION(evc->evc_code)) + *evc->evc_cond_state = FALSE ; + } + smc->srf.any_report = FALSE ; +} + +static void clear_reported(struct s_smc *smc) +{ + struct s_srf_evc *evc ; + unsigned int i ; + + smc->srf.any_report = FALSE ; + for (i = 0, evc = smc->evcs ; i < MAX_EVCS ; i++, evc++) { + if (SMT_IS_CONDITION(evc->evc_code)) { + if (*evc->evc_cond_state == FALSE) + evc->evc_rep_required = FALSE ; + else + smc->srf.any_report = TRUE ; + } + else { + evc->evc_rep_required = FALSE ; + *evc->evc_multiple = FALSE ; + } + } +} + +/* + * build and send SMT SRF frame + */ +static void smt_send_srf(struct s_smc *smc) +{ + + struct smt_header *smt ; + struct s_srf_evc *evc ; + SK_LOC_DECL(struct s_pcon,pcon) ; + SMbuf *mb ; + unsigned int i ; + + static const struct fddi_addr SMT_SRF_DA = { + { 0x80, 0x01, 0x43, 0x00, 0x80, 0x08 } + } ; + + /* + * build SMT header + */ + if (!smc->r.sm_ma_avail) + return ; + if (!(mb = smt_build_frame(smc,SMT_SRF,SMT_ANNOUNCE,0))) + return ; + + RS_SET(smc,RS_SOFTERROR) ; + + smt = smtod(mb, struct smt_header *) ; + smt->smt_dest = SMT_SRF_DA ; /* DA == SRF multicast */ + + /* + * setup parameter status + */ + pcon.pc_len = SMT_MAX_INFO_LEN ; /* max para length */ + pcon.pc_err = 0 ; /* no error */ + pcon.pc_badset = 0 ; /* no bad set count */ + pcon.pc_p = (void *) (smt + 1) ; /* paras start here */ + + smt_add_para(smc,&pcon,(u_short) SMT_P1033,0,0) ; + smt_add_para(smc,&pcon,(u_short) SMT_P1034,0,0) ; + + for (i = 0, evc = smc->evcs ; i < MAX_EVCS ; i++, evc++) { + if (evc->evc_rep_required) { + smt_add_para(smc,&pcon,evc->evc_para, + (int)evc->evc_index,0) ; + } + } + smt->smt_len = SMT_MAX_INFO_LEN - pcon.pc_len ; + mb->sm_len = smt->smt_len + sizeof(struct smt_header) ; + + DB_SMT("SRF: sending SRF at %p, len %d", smt, mb->sm_len); + DB_SMT("SRF: state SR%d Threshold %lu", + smc->srf.sr_state, smc->srf.SRThreshold / TICKS_PER_SECOND); +#ifdef DEBUG + dump_smt(smc,smt,"SRF Send") ; +#endif + smt_send_frame(smc,mb,FC_SMT_INFO,0) ; + clear_reported(smc) ; +} + +#endif /* no BOOT */ +#endif /* no SLIM_SMT */ + |