patch-2.2.18 linux/drivers/net/skfp/srf.c

• Lines: 442
• Date: Fri Sep 1 13:48:23 2000
• Orig file: v2.2.17/drivers/net/skfp/srf.c
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/drivers/net/skfp/srf.c linux/drivers/net/skfp/srf.c
@@ -0,0 +1,441 @@
+/******************************************************************************
+ *
+ *	(C)Copyright 1998,1999 SysKonnect,
+ *	a business unit of Schneider & Koch & Co. Datensysteme GmbH.
+ *
+ *	See the file "skfddi.c" for further information.
+ *
+ *	This program is free software; you can redistribute it and/or modify
+ *	it under the terms of the GNU General Public License as published by
+ *	the Free Software Foundation; either version 2 of the License, or
+ *	(at your option) any later version.
+ *
+ *	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
+
+#ifndef	lint
+static const char ID_sccs[] = "@(#)srf.c	1.18 97/08/04 (C) SK " ;
+#endif
+
+
+/*
+ * function declarations
+ */
+static void clear_all_rep() ;
+static void clear_reported() ;
+static void smt_send_srf() ;
+static struct s_srf_evc *smt_get_evc() ;
+
+#define MAX_EVCS	(sizeof(smc->evcs)/sizeof(smc->evcs[0]))
+
+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	(sizeof(evc_inits)/sizeof(evc_inits[0]))
+
+void smt_init_evc(smc)
+struct s_smc *smc ;
+{
+	struct s_srf_evc	*evc ;
+	const struct evc_init 	*init ;
+	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 ; (unsigned) 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) (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 ; (unsigned) 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(smc,code,index)
+struct s_smc *smc ;
+int code ;
+int index ;
+{
+	int			i ;
+	struct s_srf_evc	*evc ;
+
+	for (i = 0, evc = smc->evcs ; (unsigned) i < MAX_EVCS ; i++, evc++) {
+		if (evc->evc_code == code && evc->evc_index == index)
+			return(evc) ;
+	}
+	return(0) ;
+}
+
+#define THRESHOLD_2	(2*TICKS_PER_SECOND)
+#define THRESHOLD_32	(32*TICKS_PER_SECOND)
+
+#ifdef	DEBUG
+static const char * const srf_names[] = {
+	"None","MACPathChangeEvent",	"MACNeighborChangeEvent",
+	"PORTPathChangeEvent",		"PORTUndesiredConnectionAttemptEvent",
+	"SMTPeerWrapCondition",		"SMTHoldCondition",
+	"MACFrameErrorCondition",	"MACDuplicateAddressCondition",
+	"MACNotCopiedCondition",	"PORTEBErrorCondition",
+	"PORTLerCondition"
+} ;
+#endif
+
+void smt_srf_event(smc,code,index,cond)
+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_occured = 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\n",srf_names[code],index) ;
+
+		if (!(evc = smt_get_evc(smc,code,index))) {
+			DB_SMT("SRF : smt_get_evc() failed\n",0,0) ;
+			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\n",cond ? "ON":"OFF",0) ;
+			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_occured = 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_occured && 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_occured && 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(smc)
+struct s_smc *smc ;
+{
+	struct s_srf_evc	*evc ;
+	int			i ;
+
+	for (i = 0, evc = smc->evcs ; (unsigned) 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(smc)
+struct s_smc *smc ;
+{
+	struct s_srf_evc	*evc ;
+	int			i ;
+
+	smc->srf.any_report = FALSE ;
+	for (i = 0, evc = smc->evcs ; (unsigned) 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 ;
+		}
+	}
+}
+
+extern SMbuf *smt_build_frame() ;
+
+/*
+ * build and send SMT SRF frame
+ */
+static void smt_send_srf(smc)
+struct s_smc *smc ;
+{
+
+	struct smt_header	*smt ;
+	struct s_srf_evc	*evc ;
+	SK_LOC_DECL(struct s_pcon,pcon) ;
+	SMbuf			*mb ;
+	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 ; (unsigned) 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 %x, len %d \n",smt,mb->sm_len) ;
+	DB_SMT("SRF: state SR%d Threshold %d\n",
+		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 */