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

• Lines: 675
• Date: Fri Sep 1 13:48:23 2000
• Orig file: v2.2.17/drivers/net/skfp/rmt.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/rmt.c linux/drivers/net/skfp/rmt.c
@@ -0,0 +1,674 @@
+/******************************************************************************
+ *
+ *	(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 RMT
+	Ring Management
+*/
+
+/*
+ * Hardware independant state machine implemantation
+ * The following external SMT functions are referenced :
+ *
+ * 		queue_event()
+ * 		smt_timer_start()
+ * 		smt_timer_stop()
+ *
+ * 	The following external HW dependant functions are referenced :
+ *		sm_ma_control()
+ *		sm_mac_check_beacon_claim()
+ *
+ * 	The following HW dependant events are required :
+ *		RM_RING_OP
+ *		RM_RING_NON_OP
+ *		RM_MY_BEACON
+ *		RM_OTHER_BEACON
+ *		RM_MY_CLAIM
+ *		RM_TRT_EXP
+ *		RM_VALID_CLAIM
+ *
+ */
+
+#include "h/types.h"
+#include "h/fddi.h"
+#include "h/smc.h"
+
+#define KERNEL
+#include "h/smtstate.h"
+
+#ifndef	lint
+static const char ID_sccs[] = "@(#)rmt.c	2.13 99/07/02 (C) SK " ;
+#endif
+
+/*
+ * FSM Macros
+ */
+#define AFLAG	0x10
+#define GO_STATE(x)	(smc->mib.m[MAC0].fddiMACRMTState = (x)|AFLAG)
+#define ACTIONS_DONE()	(smc->mib.m[MAC0].fddiMACRMTState &= ~AFLAG)
+#define ACTIONS(x)	(x|AFLAG)
+
+#define RM0_ISOLATED	0
+#define RM1_NON_OP	1		/* not operational */
+#define RM2_RING_OP	2		/* ring operational */
+#define RM3_DETECT	3		/* detect dupl addresses */
+#define RM4_NON_OP_DUP	4		/* dupl. addr detected */
+#define RM5_RING_OP_DUP	5		/* ring oper. with dupl. addr */
+#define RM6_DIRECTED	6		/* sending directed beacons */
+#define RM7_TRACE	7		/* trace initiated */
+
+#ifdef	DEBUG
+/*
+ * symbolic state names
+ */
+static const char * const rmt_states[] = {
+	"RM0_ISOLATED","RM1_NON_OP","RM2_RING_OP","RM3_DETECT",
+	"RM4_NON_OP_DUP","RM5_RING_OP_DUP","RM6_DIRECTED",
+	"RM7_TRACE"
+} ;
+
+/*
+ * symbolic event names
+ */
+static const char * const rmt_events[] = {
+	"NONE","RM_RING_OP","RM_RING_NON_OP","RM_MY_BEACON",
+	"RM_OTHER_BEACON","RM_MY_CLAIM","RM_TRT_EXP","RM_VALID_CLAIM",
+	"RM_JOIN","RM_LOOP","RM_DUP_ADDR","RM_ENABLE_FLAG",
+	"RM_TIMEOUT_NON_OP","RM_TIMEOUT_T_STUCK",
+	"RM_TIMEOUT_ANNOUNCE","RM_TIMEOUT_T_DIRECT",
+	"RM_TIMEOUT_D_MAX","RM_TIMEOUT_POLL","RM_TX_STATE_CHANGE"
+} ;
+#endif
+
+/*
+ * Globals
+ * in struct s_rmt
+ */
+
+
+/*
+ * function declarations
+ */
+static void rmt_fsm() ;
+static void start_rmt_timer0() ;
+static void start_rmt_timer1() ;
+static void start_rmt_timer2() ;
+static void stop_rmt_timer0() ;
+static void stop_rmt_timer1() ;
+static void stop_rmt_timer2() ;
+static void rmt_dup_actions() ;
+static void rmt_reinsert_actions() ;
+static void rmt_leave_actions() ;
+static void rmt_new_dup_actions() ;
+
+#ifndef SUPERNET_3
+extern void restart_trt_for_dbcn() ;
+#endif /*SUPERNET_3*/
+
+/*
+	init RMT state machine
+	clear all RMT vars and flags
+*/
+void rmt_init(smc)
+struct s_smc *smc ;
+{
+	smc->mib.m[MAC0].fddiMACRMTState = ACTIONS(RM0_ISOLATED) ;
+	smc->r.dup_addr_test = DA_NONE ;
+	smc->r.da_flag = 0 ;
+	smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = FALSE ;
+	smc->r.sm_ma_avail = FALSE ;
+	smc->r.loop_avail = 0 ;
+	smc->r.bn_flag = 0 ;
+	smc->r.jm_flag = 0 ;
+	smc->r.no_flag = TRUE ;
+}
+
+/*
+	RMT state machine
+	called by dispatcher
+
+	do
+		display state change
+		process event
+	until SM is stable
+*/
+void rmt(smc,event)
+struct s_smc *smc ;
+int event ;
+{
+	int	state ;
+
+	do {
+		DB_RMT("RMT : state %s%s",
+			(smc->mib.m[MAC0].fddiMACRMTState & AFLAG) ? "ACTIONS " : "",
+			rmt_states[smc->mib.m[MAC0].fddiMACRMTState & ~AFLAG]) ;
+		DB_RMT(" event %s\n",rmt_events[event],0) ;
+		state = smc->mib.m[MAC0].fddiMACRMTState ;
+		rmt_fsm(smc,event) ;
+		event = 0 ;
+	} while (state != smc->mib.m[MAC0].fddiMACRMTState) ;
+	rmt_state_change(smc,(int)smc->mib.m[MAC0].fddiMACRMTState) ;
+}
+
+/*
+	process RMT event
+*/
+static void rmt_fsm(smc,cmd)
+struct s_smc *smc ;
+int cmd ;
+{
+	/*
+	 * RM00-RM70 : from all states
+	 */
+	if (!smc->r.rm_join && !smc->r.rm_loop &&
+		smc->mib.m[MAC0].fddiMACRMTState != ACTIONS(RM0_ISOLATED) &&
+		smc->mib.m[MAC0].fddiMACRMTState != RM0_ISOLATED) {
+		RS_SET(smc,RS_NORINGOP) ;
+		rmt_indication(smc,0) ;
+		GO_STATE(RM0_ISOLATED) ;
+		return ;
+	}
+
+	switch(smc->mib.m[MAC0].fddiMACRMTState) {
+	case ACTIONS(RM0_ISOLATED) :
+		stop_rmt_timer0(smc) ;
+		stop_rmt_timer1(smc) ;
+		stop_rmt_timer2(smc) ;
+
+		/*
+		 * Disable MAC.
+		 */
+		sm_ma_control(smc,MA_OFFLINE) ;
+		smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = FALSE ;
+		smc->r.loop_avail = FALSE ;
+		smc->r.sm_ma_avail = FALSE ;
+		smc->r.no_flag = TRUE ;
+		DB_RMTN(1,"RMT : ISOLATED\n",0,0) ;
+		ACTIONS_DONE() ;
+		break ;
+	case RM0_ISOLATED :
+		/*RM01*/
+		if (smc->r.rm_join || smc->r.rm_loop) {
+			/*
+			 * According to the standard the MAC must be reset
+			 * here. The FORMAC will be initialized and Claim
+			 * and Beacon Frames will be uploaded to the MAC.
+			 * So any change of Treq will take effect NOW.
+			 */
+			sm_ma_control(smc,MA_RESET) ;
+			GO_STATE(RM1_NON_OP) ;
+			break ;
+		}
+		break ;
+	case ACTIONS(RM1_NON_OP) :
+		start_rmt_timer0(smc,smc->s.rmt_t_non_op,RM_TIMEOUT_NON_OP) ;
+		stop_rmt_timer1(smc) ;
+		stop_rmt_timer2(smc) ;
+		sm_ma_control(smc,MA_BEACON) ;
+		DB_RMTN(1,"RMT : RING DOWN\n",0,0) ;
+		RS_SET(smc,RS_NORINGOP) ;
+		smc->r.sm_ma_avail = FALSE ;
+		rmt_indication(smc,0) ;
+		ACTIONS_DONE() ;
+		break ;
+	case RM1_NON_OP :
+		/*RM12*/
+		if (cmd == RM_RING_OP) {
+			RS_SET(smc,RS_RINGOPCHANGE) ;
+			GO_STATE(RM2_RING_OP) ;
+			break ;
+		}
+		/*RM13*/
+		else if (cmd == RM_TIMEOUT_NON_OP) {
+			smc->r.bn_flag = FALSE ;
+			smc->r.no_flag = TRUE ;
+			GO_STATE(RM3_DETECT) ;
+			break ;
+		}
+		break ;
+	case ACTIONS(RM2_RING_OP) :
+		stop_rmt_timer0(smc) ;
+		stop_rmt_timer1(smc) ;
+		stop_rmt_timer2(smc) ;
+		smc->r.no_flag = FALSE ;
+		if (smc->r.rm_loop)
+			smc->r.loop_avail = TRUE ;
+		if (smc->r.rm_join) {
+			smc->r.sm_ma_avail = TRUE ;
+			if (smc->mib.m[MAC0].fddiMACMA_UnitdataEnable)
+			smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = TRUE ;
+				else
+			smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = FALSE ;
+		}
+		DB_RMTN(1,"RMT : RING UP\n",0,0) ;
+		RS_CLEAR(smc,RS_NORINGOP) ;
+		RS_SET(smc,RS_RINGOPCHANGE) ;
+		rmt_indication(smc,1) ;
+		smt_stat_counter(smc,0) ;
+		ACTIONS_DONE() ;
+		break ;
+	case RM2_RING_OP :
+		/*RM21*/
+		if (cmd == RM_RING_NON_OP) {
+			smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = FALSE ;
+			smc->r.loop_avail = FALSE ;
+			RS_SET(smc,RS_RINGOPCHANGE) ;
+			GO_STATE(RM1_NON_OP) ;
+			break ;
+		}
+		/*RM22a*/
+		else if (cmd == RM_ENABLE_FLAG) {
+			if (smc->mib.m[MAC0].fddiMACMA_UnitdataEnable)
+			smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = TRUE ;
+				else
+			smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = FALSE ;
+		}
+		/*RM25*/
+		else if (smc->r.dup_addr_test == DA_FAILED) {
+			smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = FALSE ;
+			smc->r.loop_avail = FALSE ;
+			smc->r.da_flag = TRUE ;
+			GO_STATE(RM5_RING_OP_DUP) ;
+			break ;
+		}
+		break ;
+	case ACTIONS(RM3_DETECT) :
+		start_rmt_timer0(smc,smc->s.mac_d_max*2,RM_TIMEOUT_D_MAX) ;
+		start_rmt_timer1(smc,smc->s.rmt_t_stuck,RM_TIMEOUT_T_STUCK) ;
+		start_rmt_timer2(smc,smc->s.rmt_t_poll,RM_TIMEOUT_POLL) ;
+		sm_mac_check_beacon_claim(smc) ;
+		DB_RMTN(1,"RMT : RM3_DETECT\n",0,0) ;
+		ACTIONS_DONE() ;
+		break ;
+	case RM3_DETECT :
+		if (cmd == RM_TIMEOUT_POLL) {
+			start_rmt_timer2(smc,smc->s.rmt_t_poll,RM_TIMEOUT_POLL);
+			sm_mac_check_beacon_claim(smc) ;
+			break ;
+		}
+		if (cmd == RM_TIMEOUT_D_MAX) {
+			smc->r.timer0_exp = TRUE ;
+		}
+		/*
+		 *jd(22-Feb-1999)
+		 * We need a time ">= 2*mac_d_max" since we had finished
+		 * Claim or Beacon state. So we will restart timer0 at
+		 * every state change.
+		 */
+		if (cmd == RM_TX_STATE_CHANGE) {
+			start_rmt_timer0(smc,
+					 smc->s.mac_d_max*2,
+					 RM_TIMEOUT_D_MAX) ;
+		}
+		/*RM32*/
+		if (cmd == RM_RING_OP) {
+			GO_STATE(RM2_RING_OP) ;
+			break ;
+		}
+		/*RM33a*/
+		else if ((cmd == RM_MY_BEACON || cmd == RM_OTHER_BEACON)
+			&& smc->r.bn_flag) {
+			smc->r.bn_flag = FALSE ;
+		}
+		/*RM33b*/
+		else if (cmd == RM_TRT_EXP && !smc->r.bn_flag) {
+			int	tx ;
+			/*
+			 * set bn_flag only if in state T4 or T5:
+			 * only if we're the beaconer should we start the
+			 * trace !
+			 */
+			if ((tx =  sm_mac_get_tx_state(smc)) == 4 || tx == 5) {
+			DB_RMTN(2,"RMT : DETECT && TRT_EXPIRED && T4/T5\n",0,0);
+				smc->r.bn_flag = TRUE ;
+				/*
+				 * If one of the upstream stations beaconed
+				 * and the link to the upstream neighbor is
+				 * lost we need to restart the stuck timer to
+				 * check the "stuck beacon" condition.
+				 */
+				start_rmt_timer1(smc,smc->s.rmt_t_stuck,
+					RM_TIMEOUT_T_STUCK) ;
+			}
+			/*
+			 * We do NOT need to clear smc->r.bn_flag in case of
+			 * not being in state T4 or T5, because the flag
+			 * must be cleared in order to get in this condition.
+			 */
+
+			DB_RMTN(2,
+			"RMT : sm_mac_get_tx_state() = %d (bn_flag = %d)\n",
+			tx,smc->r.bn_flag) ;
+		}
+		/*RM34a*/
+		else if (cmd == RM_MY_CLAIM && smc->r.timer0_exp) {
+			rmt_new_dup_actions(smc) ;
+			GO_STATE(RM4_NON_OP_DUP) ;
+			break ;
+		}
+		/*RM34b*/
+		else if (cmd == RM_MY_BEACON && smc->r.timer0_exp) {
+			rmt_new_dup_actions(smc) ;
+			GO_STATE(RM4_NON_OP_DUP) ;
+			break ;
+		}
+		/*RM34c*/
+		else if (cmd == RM_VALID_CLAIM) {
+			rmt_new_dup_actions(smc) ;
+			GO_STATE(RM4_NON_OP_DUP) ;
+			break ;
+		}
+		/*RM36*/
+		else if (cmd == RM_TIMEOUT_T_STUCK &&
+			smc->r.rm_join && smc->r.bn_flag) {
+			GO_STATE(RM6_DIRECTED) ;
+			break ;
+		}
+		break ;
+	case ACTIONS(RM4_NON_OP_DUP) :
+		start_rmt_timer0(smc,smc->s.rmt_t_announce,RM_TIMEOUT_ANNOUNCE);
+		start_rmt_timer1(smc,smc->s.rmt_t_stuck,RM_TIMEOUT_T_STUCK) ;
+		start_rmt_timer2(smc,smc->s.rmt_t_poll,RM_TIMEOUT_POLL) ;
+		sm_mac_check_beacon_claim(smc) ;
+		DB_RMTN(1,"RMT : RM4_NON_OP_DUP\n",0,0) ;
+		ACTIONS_DONE() ;
+		break ;
+	case RM4_NON_OP_DUP :
+		if (cmd == RM_TIMEOUT_POLL) {
+			start_rmt_timer2(smc,smc->s.rmt_t_poll,RM_TIMEOUT_POLL);
+			sm_mac_check_beacon_claim(smc) ;
+			break ;
+		}
+		/*RM41*/
+		if (!smc->r.da_flag) {
+			GO_STATE(RM1_NON_OP) ;
+			break ;
+		}
+		/*RM44a*/
+		else if ((cmd == RM_MY_BEACON || cmd == RM_OTHER_BEACON) &&
+			smc->r.bn_flag) {
+			smc->r.bn_flag = FALSE ;
+		}
+		/*RM44b*/
+		else if (cmd == RM_TRT_EXP && !smc->r.bn_flag) {
+			int	tx ;
+			/*
+			 * set bn_flag only if in state T4 or T5:
+			 * only if we're the beaconer should we start the
+			 * trace !
+			 */
+			if ((tx =  sm_mac_get_tx_state(smc)) == 4 || tx == 5) {
+			DB_RMTN(2,"RMT : NOPDUP && TRT_EXPIRED && T4/T5\n",0,0);
+				smc->r.bn_flag = TRUE ;
+				/*
+				 * If one of the upstream stations beaconed
+				 * and the link to the upstream neighbor is
+				 * lost we need to restart the stuck timer to
+				 * check the "stuck beacon" condition.
+				 */
+				start_rmt_timer1(smc,smc->s.rmt_t_stuck,
+					RM_TIMEOUT_T_STUCK) ;
+			}
+			/*
+			 * We do NOT need to clear smc->r.bn_flag in case of
+			 * not being in state T4 or T5, because the flag
+			 * must be cleared in order to get in this condition.
+			 */
+
+			DB_RMTN(2,
+			"RMT : sm_mac_get_tx_state() = %d (bn_flag = %d)\n",
+			tx,smc->r.bn_flag) ;
+		}
+		/*RM44c*/
+		else if (cmd == RM_TIMEOUT_ANNOUNCE && !smc->r.bn_flag) {
+			rmt_dup_actions(smc) ;
+		}
+		/*RM45*/
+		else if (cmd == RM_RING_OP) {
+			smc->r.no_flag = FALSE ;
+			GO_STATE(RM5_RING_OP_DUP) ;
+			break ;
+		}
+		/*RM46*/
+		else if (cmd == RM_TIMEOUT_T_STUCK &&
+			smc->r.rm_join && smc->r.bn_flag) {
+			GO_STATE(RM6_DIRECTED) ;
+			break ;
+		}
+		break ;
+	case ACTIONS(RM5_RING_OP_DUP) :
+		stop_rmt_timer0(smc) ;
+		stop_rmt_timer1(smc) ;
+		stop_rmt_timer2(smc) ;
+		DB_RMTN(1,"RMT : RM5_RING_OP_DUP\n",0,0) ;
+		ACTIONS_DONE() ;
+		break;
+	case RM5_RING_OP_DUP :
+		/*RM52*/
+		if (smc->r.dup_addr_test == DA_PASSED) {
+			smc->r.da_flag = FALSE ;
+			GO_STATE(RM2_RING_OP) ;
+			break ;
+		}
+		/*RM54*/
+		else if (cmd == RM_RING_NON_OP) {
+			smc->r.jm_flag = FALSE ;
+			smc->r.bn_flag = FALSE ;
+			GO_STATE(RM4_NON_OP_DUP) ;
+			break ;
+		}
+		break ;
+	case ACTIONS(RM6_DIRECTED) :
+		start_rmt_timer0(smc,smc->s.rmt_t_direct,RM_TIMEOUT_T_DIRECT) ;
+		stop_rmt_timer1(smc) ;
+		start_rmt_timer2(smc,smc->s.rmt_t_poll,RM_TIMEOUT_POLL) ;
+		sm_ma_control(smc,MA_DIRECTED) ;
+		RS_SET(smc,RS_BEACON) ;
+		DB_RMTN(1,"RMT : RM6_DIRECTED\n",0,0) ;
+		ACTIONS_DONE() ;
+		break ;
+	case RM6_DIRECTED :
+		/*RM63*/
+		if (cmd == RM_TIMEOUT_POLL) {
+			start_rmt_timer2(smc,smc->s.rmt_t_poll,RM_TIMEOUT_POLL);
+			sm_mac_check_beacon_claim(smc) ;
+#ifndef SUPERNET_3
+			/* Because of problems with the Supernet II chip set
+			 * sending of Directed Beacon will stop after 165ms
+			 * therefore restart_trt_for_dbcn(smc) will be called
+			 * to prevent this.
+			 */
+			restart_trt_for_dbcn(smc) ;
+#endif /*SUPERNET_3*/
+			break ;
+		}
+		if ((cmd == RM_MY_BEACON || cmd == RM_OTHER_BEACON) &&
+			!smc->r.da_flag) {
+			smc->r.bn_flag = FALSE ;
+			GO_STATE(RM3_DETECT) ;
+			break ;
+		}
+		/*RM64*/
+		else if ((cmd == RM_MY_BEACON || cmd == RM_OTHER_BEACON) &&
+			smc->r.da_flag) {
+			smc->r.bn_flag = FALSE ;
+			GO_STATE(RM4_NON_OP_DUP) ;
+			break ;
+		}
+		/*RM67*/
+		else if (cmd == RM_TIMEOUT_T_DIRECT) {
+			GO_STATE(RM7_TRACE) ;
+			break ;
+		}
+		break ;
+	case ACTIONS(RM7_TRACE) :
+		stop_rmt_timer0(smc) ;
+		stop_rmt_timer1(smc) ;
+		stop_rmt_timer2(smc) ;
+		smc->e.trace_prop |= ENTITY_BIT(ENTITY_MAC) ;
+		queue_event(smc,EVENT_ECM,EC_TRACE_PROP) ;
+		DB_RMTN(1,"RMT : RM7_TRACE\n",0,0) ;
+		ACTIONS_DONE() ;
+		break ;
+	case RM7_TRACE :
+		break ;
+	default:
+		SMT_PANIC(smc,SMT_E0122, SMT_E0122_MSG) ;
+		break;
+	}
+}
+
+/*
+ * (jd) RMT duplicate address actions
+ * leave the ring or reinsert just as configured
+ */
+static void rmt_dup_actions(smc)
+struct s_smc *smc ;
+{
+	if (smc->r.jm_flag) {
+	}
+	else {
+		if (smc->s.rmt_dup_mac_behavior) {
+			SMT_ERR_LOG(smc,SMT_E0138, SMT_E0138_MSG) ;
+                        rmt_reinsert_actions(smc) ;
+		}
+		else {
+			SMT_ERR_LOG(smc,SMT_E0135, SMT_E0135_MSG) ;
+			rmt_leave_actions(smc) ;
+		}
+	}
+}
+
+/*
+ * Reconnect to the Ring
+ */
+static void rmt_reinsert_actions(smc)
+struct s_smc *smc ;
+{
+	queue_event(smc,EVENT_ECM,EC_DISCONNECT) ;
+	queue_event(smc,EVENT_ECM,EC_CONNECT) ;
+}
+
+/*
+ * duplicate address detected
+ */
+static void rmt_new_dup_actions(smc)
+struct s_smc *smc ;
+{
+	smc->r.da_flag = TRUE ;
+	smc->r.bn_flag = FALSE ;
+	smc->r.jm_flag = FALSE ;
+	/*
+	 * we have three options : change address, jam or leave
+	 * we leave the ring as default 
+	 * Optionally it's possible to reinsert after leaving the Ring
+	 * but this will not conform with SMT Spec.
+	 */
+	if (smc->s.rmt_dup_mac_behavior) {
+		SMT_ERR_LOG(smc,SMT_E0138, SMT_E0138_MSG) ;
+		rmt_reinsert_actions(smc) ;
+	}
+	else {
+		SMT_ERR_LOG(smc,SMT_E0135, SMT_E0135_MSG) ;
+		rmt_leave_actions(smc) ;
+	}
+}
+
+
+/*
+ * leave the ring
+ */
+static void rmt_leave_actions(smc)
+struct s_smc *smc ;
+{
+	queue_event(smc,EVENT_ECM,EC_DISCONNECT) ;
+	/*
+	 * Note: Do NOT try again later. (with please reconnect)
+	 * The station must be left from the ring!
+	 */
+}
+
+/*
+ * SMT timer interface
+ *	start RMT timer 0
+ */
+static void start_rmt_timer0(smc,value,event)
+struct s_smc *smc ;
+u_long value ;
+int event ;
+{
+	smc->r.timer0_exp = FALSE ;		/* clear timer event flag */
+	smt_timer_start(smc,&smc->r.rmt_timer0,value,EV_TOKEN(EVENT_RMT,event));
+}
+
+/*
+ * SMT timer interface
+ *	start RMT timer 1
+ */
+static void start_rmt_timer1(smc,value,event)
+struct s_smc *smc ;
+u_long value ;
+int event ;
+{
+	smc->r.timer1_exp = FALSE ;	/* clear timer event flag */
+	smt_timer_start(smc,&smc->r.rmt_timer1,value,EV_TOKEN(EVENT_RMT,event));
+}
+
+/*
+ * SMT timer interface
+ *	start RMT timer 2
+ */
+static void start_rmt_timer2(smc,value,event)
+struct s_smc *smc ;
+u_long value ;
+int event ;
+{
+	smc->r.timer2_exp = FALSE ;		/* clear timer event flag */
+	smt_timer_start(smc,&smc->r.rmt_timer2,value,EV_TOKEN(EVENT_RMT,event));
+}
+
+/*
+ * SMT timer interface
+ *	stop RMT timer 0
+ */
+static void stop_rmt_timer0(smc)
+struct s_smc *smc ;
+{
+	if (smc->r.rmt_timer0.tm_active)
+		smt_timer_stop(smc,&smc->r.rmt_timer0) ;
+}
+
+/*
+ * SMT timer interface
+ *	stop RMT timer 1
+ */
+static void stop_rmt_timer1(smc)
+struct s_smc *smc ;
+{
+	if (smc->r.rmt_timer1.tm_active)
+		smt_timer_stop(smc,&smc->r.rmt_timer1) ;
+}
+
+/*
+ * SMT timer interface
+ *	stop RMT timer 2
+ */
+static void stop_rmt_timer2(smc)
+struct s_smc *smc ;
+{
+	if (smc->r.rmt_timer2.tm_active)
+		smt_timer_stop(smc,&smc->r.rmt_timer2) ;
+}