drivers/net/fddi/skfp/ecm.c - linux/torvalds/linux - Git at Google

 // 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 ECM
 	Entity Coordination Management
 	Hardware independent state machine
 */

 /*
  * Hardware independent state machine implemantation
  * The following external SMT functions are referenced :
  *
  * 		queue_event()
  * 		smt_timer_start()
  * 		smt_timer_stop()
  *
  * 	The following external HW dependent functions are referenced :
  * 		sm_pm_bypass_req()
  * 		sm_pm_get_ls()
  *
  * 	The following HW dependent events are required :
  *		NONE
  *
  */

 #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[] = "@(#)ecm.c	2.7 99/08/05 (C) SK " ;
 #endif

 /*
  * FSM Macros
  */
 #define AFLAG	0x10
 #define GO_STATE(x)	(smc->mib.fddiSMTECMState = (x)|AFLAG)
 #define ACTIONS_DONE()	(smc->mib.fddiSMTECMState &= ~AFLAG)
 #define ACTIONS(x)	(x|AFLAG)

 #define EC0_OUT		0			/* not inserted */
 #define EC1_IN		1			/* inserted */
 #define EC2_TRACE	2			/* tracing */
 #define EC3_LEAVE	3			/* leaving the ring */
 #define EC4_PATH_TEST	4			/* performing path test */
 #define EC5_INSERT	5			/* bypass being turned on */
 #define EC6_CHECK	6			/* checking bypass */
 #define EC7_DEINSERT	7			/* bypass being turnde off */

 /*
  * symbolic state names
  */
 static const char * const ecm_states[] = {
 	"EC0_OUT","EC1_IN","EC2_TRACE","EC3_LEAVE","EC4_PATH_TEST",
 	"EC5_INSERT","EC6_CHECK","EC7_DEINSERT"
 } ;

 /*
  * symbolic event names
  */
 static const char * const ecm_events[] = {
 	"NONE","EC_CONNECT","EC_DISCONNECT","EC_TRACE_PROP","EC_PATH_TEST",
 	"EC_TIMEOUT_TD","EC_TIMEOUT_TMAX",
 	"EC_TIMEOUT_IMAX","EC_TIMEOUT_INMAX","EC_TEST_DONE"
 } ;

 /*
  * all Globals  are defined in smc.h
  * struct s_ecm
  */

 /*
  * function declarations
  */

 static void ecm_fsm(struct s_smc *smc, int cmd);
 static void start_ecm_timer(struct s_smc *smc, u_long value, int event);
 static void stop_ecm_timer(struct s_smc *smc);
 static void prop_actions(struct s_smc *smc);

 /*
 	init ECM state machine
 	clear all ECM vars and flags
 */
 void ecm_init(struct s_smc *smc)
 {
 	smc->e.path_test = PT_PASSED ;
 	smc->e.trace_prop = 0 ;
 	smc->e.sb_flag = 0 ;
 	smc->mib.fddiSMTECMState = ACTIONS(EC0_OUT) ;
 	smc->e.ecm_line_state = FALSE ;
 }

 /*
 	ECM state machine
 	called by dispatcher

 	do
 		display state change
 		process event
 	until SM is stable
 */
 void ecm(struct s_smc *smc, int event)
 {
 	int	state ;

 	do {
 		DB_ECM("ECM : state %s%s event %s",
 		       smc->mib.fddiSMTECMState & AFLAG ? "ACTIONS " : "",
 		       ecm_states[smc->mib.fddiSMTECMState & ~AFLAG],
 		       ecm_events[event]);
 		state = smc->mib.fddiSMTECMState ;
 		ecm_fsm(smc,event) ;
 		event = 0 ;
 	} while (state != smc->mib.fddiSMTECMState) ;
 	ecm_state_change(smc,(int)smc->mib.fddiSMTECMState) ;
 }

 /*
 	process ECM event
 */
 static void ecm_fsm(struct s_smc *smc, int cmd)
 {
 	int ls_a ;			/* current line state PHY A */
 	int ls_b ;			/* current line state PHY B */
 	int	p ;			/* ports */


 	smc->mib.fddiSMTBypassPresent = sm_pm_bypass_present(smc) ;
 	if (cmd == EC_CONNECT)
 		smc->mib.fddiSMTRemoteDisconnectFlag = FALSE ;

 	/* For AIX event notification: */
 	/* Is a disconnect  command remotely issued ? */
 	if (cmd == EC_DISCONNECT &&
 		smc->mib.fddiSMTRemoteDisconnectFlag == TRUE)
 		AIX_EVENT (smc, (u_long) CIO_HARD_FAIL, (u_long)
 			FDDI_REMOTE_DISCONNECT, smt_get_event_word(smc),
 			smt_get_error_word(smc) );

 	/*jd 05-Aug-1999 Bug #10419 "Port Disconnect fails at Dup MAc Cond."*/
 	if (cmd == EC_CONNECT) {
 		smc->e.DisconnectFlag = FALSE ;
 	}
 	else if (cmd == EC_DISCONNECT) {
 		smc->e.DisconnectFlag = TRUE ;
 	}

 	switch(smc->mib.fddiSMTECMState) {
 	case ACTIONS(EC0_OUT) :
 		/*
 		 * We do not perform a path test
 		 */
 		smc->e.path_test = PT_PASSED ;
 		smc->e.ecm_line_state = FALSE ;
 		stop_ecm_timer(smc) ;
 		ACTIONS_DONE() ;
 		break ;
 	case EC0_OUT:
 		/*EC01*/
 		if (cmd == EC_CONNECT && !smc->mib.fddiSMTBypassPresent
 			&& smc->e.path_test==PT_PASSED) {
 			GO_STATE(EC1_IN) ;
 			break ;
 		}
 		/*EC05*/
 		else if (cmd == EC_CONNECT && (smc->e.path_test==PT_PASSED) &&
 			smc->mib.fddiSMTBypassPresent &&
 			(smc->s.sas == SMT_DAS)) {
 			GO_STATE(EC5_INSERT) ;
 			break ;
 		}
 		break;
 	case ACTIONS(EC1_IN) :
 		stop_ecm_timer(smc) ;
 		smc->e.trace_prop = 0 ;
 		sm_ma_control(smc,MA_TREQ) ;
 		for (p = 0 ; p < NUMPHYS ; p++)
 			if (smc->mib.p[p].fddiPORTHardwarePresent)
 				queue_event(smc,EVENT_PCMA+p,PC_START) ;
 		ACTIONS_DONE() ;
 		break ;
 	case EC1_IN:
 		/*EC12*/
 		if (cmd == EC_TRACE_PROP) {
 			prop_actions(smc) ;
 			GO_STATE(EC2_TRACE) ;
 			break ;
 		}
 		/*EC13*/
 		else if (cmd == EC_DISCONNECT) {
 			GO_STATE(EC3_LEAVE) ;
 			break ;
 		}
 		break;
 	case ACTIONS(EC2_TRACE) :
 		start_ecm_timer(smc,MIB2US(smc->mib.fddiSMTTrace_MaxExpiration),
 			EC_TIMEOUT_TMAX) ;
 		ACTIONS_DONE() ;
 		break ;
 	case EC2_TRACE :
 		/*EC22*/
 		if (cmd == EC_TRACE_PROP) {
 			prop_actions(smc) ;
 			GO_STATE(EC2_TRACE) ;
 			break ;
 		}
 		/*EC23a*/
 		else if (cmd == EC_DISCONNECT) {
 			smc->e.path_test = PT_EXITING ;
 			GO_STATE(EC3_LEAVE) ;
 			break ;
 		}
 		/*EC23b*/
 		else if (smc->e.path_test == PT_PENDING) {
 			GO_STATE(EC3_LEAVE) ;
 			break ;
 		}
 		/*EC23c*/
 		else if (cmd == EC_TIMEOUT_TMAX) {
 			/* Trace_Max is expired */
 			/* -> send AIX_EVENT */
 			AIX_EVENT(smc, (u_long) FDDI_RING_STATUS,
 				(u_long) FDDI_SMT_ERROR, (u_long)
 				FDDI_TRACE_MAX, smt_get_error_word(smc));
 			smc->e.path_test = PT_PENDING ;
 			GO_STATE(EC3_LEAVE) ;
 			break ;
 		}
 		break ;
 	case ACTIONS(EC3_LEAVE) :
 		start_ecm_timer(smc,smc->s.ecm_td_min,EC_TIMEOUT_TD) ;
 		for (p = 0 ; p < NUMPHYS ; p++)
 			queue_event(smc,EVENT_PCMA+p,PC_STOP) ;
 		ACTIONS_DONE() ;
 		break ;
 	case EC3_LEAVE:
 		/*EC30*/
 		if (cmd == EC_TIMEOUT_TD && !smc->mib.fddiSMTBypassPresent &&
 			(smc->e.path_test != PT_PENDING)) {
 			GO_STATE(EC0_OUT) ;
 			break ;
 		}
 		/*EC34*/
 		else if (cmd == EC_TIMEOUT_TD &&
 			(smc->e.path_test == PT_PENDING)) {
 			GO_STATE(EC4_PATH_TEST) ;
 			break ;
 		}
 		/*EC31*/
 		else if (cmd == EC_CONNECT && smc->e.path_test == PT_PASSED) {
 			GO_STATE(EC1_IN) ;
 			break ;
 		}
 		/*EC33*/
 		else if (cmd == EC_DISCONNECT &&
 			smc->e.path_test == PT_PENDING) {
 			smc->e.path_test = PT_EXITING ;
 			/*
 			 * stay in state - state will be left via timeout
 			 */
 		}
 		/*EC37*/
 		else if (cmd == EC_TIMEOUT_TD &&
 			smc->mib.fddiSMTBypassPresent &&
 			smc->e.path_test != PT_PENDING) {
 			GO_STATE(EC7_DEINSERT) ;
 			break ;
 		}
 		break ;
 	case ACTIONS(EC4_PATH_TEST) :
 		stop_ecm_timer(smc) ;
 		smc->e.path_test = PT_TESTING ;
 		start_ecm_timer(smc,smc->s.ecm_test_done,EC_TEST_DONE) ;
 		/* now perform path test ... just a simulation */
 		ACTIONS_DONE() ;
 		break ;
 	case EC4_PATH_TEST :
 		/* path test done delay */
 		if (cmd == EC_TEST_DONE)
 			smc->e.path_test = PT_PASSED ;

 		if (smc->e.path_test == PT_FAILED)
 			RS_SET(smc,RS_PATHTEST) ;

 		/*EC40a*/
 		if (smc->e.path_test == PT_FAILED &&
 			!smc->mib.fddiSMTBypassPresent) {
 			GO_STATE(EC0_OUT) ;
 			break ;
 		}
 		/*EC40b*/
 		else if (cmd == EC_DISCONNECT &&
 			!smc->mib.fddiSMTBypassPresent) {
 			GO_STATE(EC0_OUT) ;
 			break ;
 		}
 		/*EC41*/
 		else if (smc->e.path_test == PT_PASSED) {
 			GO_STATE(EC1_IN) ;
 			break ;
 		}
 		/*EC47a*/
 		else if (smc->e.path_test == PT_FAILED &&
 			smc->mib.fddiSMTBypassPresent) {
 			GO_STATE(EC7_DEINSERT) ;
 			break ;
 		}
 		/*EC47b*/
 		else if (cmd == EC_DISCONNECT &&
 			smc->mib.fddiSMTBypassPresent) {
 			GO_STATE(EC7_DEINSERT) ;
 			break ;
 		}
 		break ;
 	case ACTIONS(EC5_INSERT) :
 		sm_pm_bypass_req(smc,BP_INSERT);
 		start_ecm_timer(smc,smc->s.ecm_in_max,EC_TIMEOUT_INMAX) ;
 		ACTIONS_DONE() ;
 		break ;
 	case EC5_INSERT :
 		/*EC56*/
 		if (cmd == EC_TIMEOUT_INMAX) {
 			GO_STATE(EC6_CHECK) ;
 			break ;
 		}
 		/*EC57*/
 		else if (cmd == EC_DISCONNECT) {
 			GO_STATE(EC7_DEINSERT) ;
 			break ;
 		}
 		break ;
 	case ACTIONS(EC6_CHECK) :
 		/*
 		 * in EC6_CHECK, we *POLL* the line state !
 		 * check whether both bypass switches have switched.
 		 */
 		start_ecm_timer(smc,smc->s.ecm_check_poll,0) ;
 		smc->e.ecm_line_state = TRUE ;	/* flag to pcm: report Q/HLS */
 		ACTIONS_DONE() ;
 		break ;
 	case EC6_CHECK :
 		ls_a = sm_pm_get_ls(smc,PA) ;
 		ls_b = sm_pm_get_ls(smc,PB) ;

 		/*EC61*/
 		if (((ls_a == PC_QLS) || (ls_a == PC_HLS)) &&
 		    ((ls_b == PC_QLS) || (ls_b == PC_HLS)) ) {
 			smc->e.sb_flag = FALSE ;
 			smc->e.ecm_line_state = FALSE ;
 			GO_STATE(EC1_IN) ;
 			break ;
 		}
 		/*EC66*/
 		else if (!smc->e.sb_flag &&
 			 (((ls_a == PC_ILS) && (ls_b == PC_QLS)) ||
 			  ((ls_a == PC_QLS) && (ls_b == PC_ILS)))){
 			smc->e.sb_flag = TRUE ;
 			DB_ECMN(1, "ECM : EC6_CHECK - stuck bypass");
 			AIX_EVENT(smc, (u_long) FDDI_RING_STATUS, (u_long)
 				FDDI_SMT_ERROR, (u_long) FDDI_BYPASS_STUCK,
 				smt_get_error_word(smc));
 		}
 		/*EC67*/
 		else if (cmd == EC_DISCONNECT) {
 			smc->e.ecm_line_state = FALSE ;
 			GO_STATE(EC7_DEINSERT) ;
 			break ;
 		}
 		else {
 			/*
 			 * restart poll
 			 */
 			start_ecm_timer(smc,smc->s.ecm_check_poll,0) ;
 		}
 		break ;
 	case ACTIONS(EC7_DEINSERT) :
 		sm_pm_bypass_req(smc,BP_DEINSERT);
 		start_ecm_timer(smc,smc->s.ecm_i_max,EC_TIMEOUT_IMAX) ;
 		ACTIONS_DONE() ;
 		break ;
 	case EC7_DEINSERT:
 		/*EC70*/
 		if (cmd == EC_TIMEOUT_IMAX) {
 			GO_STATE(EC0_OUT) ;
 			break ;
 		}
 		/*EC75*/
 		else if (cmd == EC_CONNECT && smc->e.path_test == PT_PASSED) {
 			GO_STATE(EC5_INSERT) ;
 			break ;
 		}
 		break;
 	default:
 		SMT_PANIC(smc,SMT_E0107, SMT_E0107_MSG) ;
 		break;
 	}
 }

 #ifndef	CONCENTRATOR
 /*
  * trace propagation actions for SAS & DAS
  */
 static void prop_actions(struct s_smc *smc)
 {
 	int	port_in = 0 ;
 	int	port_out = 0 ;

 	RS_SET(smc,RS_EVENT) ;
 	switch (smc->s.sas) {
 	case SMT_SAS :
 		port_in = port_out = pcm_get_s_port(smc) ;
 		break ;
 	case SMT_DAS :
 		port_in = cfm_get_mac_input(smc) ;	/* PA or PB */
 		port_out = cfm_get_mac_output(smc) ;	/* PA or PB */
 		break ;
 	case SMT_NAC :
 		SMT_PANIC(smc,SMT_E0108, SMT_E0108_MSG) ;
 		return ;
 	}

 	DB_ECM("ECM : prop_actions - trace_prop %lu", smc->e.trace_prop);
 	DB_ECM("ECM : prop_actions - in %d out %d", port_in, port_out);

 	if (smc->e.trace_prop & ENTITY_BIT(ENTITY_MAC)) {
 		/* trace initiatior */
 		DB_ECM("ECM : initiate TRACE on PHY %c", 'A' + port_in - PA);
 		queue_event(smc,EVENT_PCM+port_in,PC_TRACE) ;
 	}
 	else if ((smc->e.trace_prop & ENTITY_BIT(ENTITY_PHY(PA))) &&
 		port_out != PA) {
 		/* trace propagate upstream */
 		DB_ECM("ECM : propagate TRACE on PHY B");
 		queue_event(smc,EVENT_PCMB,PC_TRACE) ;
 	}
 	else if ((smc->e.trace_prop & ENTITY_BIT(ENTITY_PHY(PB))) &&
 		port_out != PB) {
 		/* trace propagate upstream */
 		DB_ECM("ECM : propagate TRACE on PHY A");
 		queue_event(smc,EVENT_PCMA,PC_TRACE) ;
 	}
 	else {
 		/* signal trace termination */
 		DB_ECM("ECM : TRACE terminated");
 		smc->e.path_test = PT_PENDING ;
 	}
 	smc->e.trace_prop = 0 ;
 }
 #else
 /*
  * trace propagation actions for Concentrator
  */
 static void prop_actions(struct s_smc *smc)
 {
 	int	initiator ;
 	int	upstream ;
 	int	p ;

 	RS_SET(smc,RS_EVENT) ;
 	while (smc->e.trace_prop) {
 		DB_ECM("ECM : prop_actions - trace_prop %d",
 		       smc->e.trace_prop);

 		if (smc->e.trace_prop & ENTITY_BIT(ENTITY_MAC)) {
 			initiator = ENTITY_MAC ;
 			smc->e.trace_prop &= ~ENTITY_BIT(ENTITY_MAC) ;
 			DB_ECM("ECM: MAC initiates trace");
 		}
 		else {
 			for (p = NUMPHYS-1 ; p >= 0 ; p--) {
 				if (smc->e.trace_prop &
 					ENTITY_BIT(ENTITY_PHY(p)))
 					break ;
 			}
 			initiator = ENTITY_PHY(p) ;
 			smc->e.trace_prop &= ~ENTITY_BIT(ENTITY_PHY(p)) ;
 		}
 		upstream = cem_get_upstream(smc,initiator) ;

 		if (upstream == ENTITY_MAC) {
 			/* signal trace termination */
 			DB_ECM("ECM : TRACE terminated");
 			smc->e.path_test = PT_PENDING ;
 		}
 		else {
 			/* trace propagate upstream */
 			DB_ECM("ECM : propagate TRACE on PHY %d", upstream);
 			queue_event(smc,EVENT_PCM+upstream,PC_TRACE) ;
 		}
 	}
 }
 #endif


 /*
  * SMT timer interface
  *	start ECM timer
  */
 static void start_ecm_timer(struct s_smc *smc, u_long value, int event)
 {
 	smt_timer_start(smc,&smc->e.ecm_timer,value,EV_TOKEN(EVENT_ECM,event));
 }

 /*
  * SMT timer interface
  *	stop ECM timer
  */
 static void stop_ecm_timer(struct s_smc *smc)
 {
 	if (smc->e.ecm_timer.tm_active)
 		smt_timer_stop(smc,&smc->e.ecm_timer) ;
 }
	// 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 ECM
	Entity Coordination Management
	Hardware independent state machine
	*/

	/*
	* Hardware independent state machine implemantation
	* The following external SMT functions are referenced :
	*
	* queue_event()
	* smt_timer_start()
	* smt_timer_stop()
	*
	* The following external HW dependent functions are referenced :
	* sm_pm_bypass_req()
	* sm_pm_get_ls()
	*
	* The following HW dependent events are required :
	* NONE
	*
	*/

	#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[] = "@(#)ecm.c 2.7 99/08/05 (C) SK " ;
	#endif

	/*
	* FSM Macros
	*/
	#define AFLAG 0x10
	#define GO_STATE(x) (smc->mib.fddiSMTECMState = (x)\|AFLAG)
	#define ACTIONS_DONE() (smc->mib.fddiSMTECMState &= ~AFLAG)
	#define ACTIONS(x) (x\|AFLAG)

	#define EC0_OUT 0 /* not inserted */
	#define EC1_IN 1 /* inserted */
	#define EC2_TRACE 2 /* tracing */
	#define EC3_LEAVE 3 /* leaving the ring */
	#define EC4_PATH_TEST 4 /* performing path test */
	#define EC5_INSERT 5 /* bypass being turned on */
	#define EC6_CHECK 6 /* checking bypass */
	#define EC7_DEINSERT 7 /* bypass being turnde off */

	/*
	* symbolic state names
	*/
	static const char * const ecm_states[] = {
	"EC0_OUT","EC1_IN","EC2_TRACE","EC3_LEAVE","EC4_PATH_TEST",
	"EC5_INSERT","EC6_CHECK","EC7_DEINSERT"
	} ;

	/*
	* symbolic event names
	*/
	static const char * const ecm_events[] = {
	"NONE","EC_CONNECT","EC_DISCONNECT","EC_TRACE_PROP","EC_PATH_TEST",
	"EC_TIMEOUT_TD","EC_TIMEOUT_TMAX",
	"EC_TIMEOUT_IMAX","EC_TIMEOUT_INMAX","EC_TEST_DONE"
	} ;

	/*
	* all Globals are defined in smc.h
	* struct s_ecm
	*/

	/*
	* function declarations
	*/

	static void ecm_fsm(struct s_smc *smc, int cmd);
	static void start_ecm_timer(struct s_smc *smc, u_long value, int event);
	static void stop_ecm_timer(struct s_smc *smc);
	static void prop_actions(struct s_smc *smc);

	/*
	init ECM state machine
	clear all ECM vars and flags
	*/
	void ecm_init(struct s_smc *smc)
	{
	smc->e.path_test = PT_PASSED ;
	smc->e.trace_prop = 0 ;
	smc->e.sb_flag = 0 ;
	smc->mib.fddiSMTECMState = ACTIONS(EC0_OUT) ;
	smc->e.ecm_line_state = FALSE ;
	}

	/*
	ECM state machine
	called by dispatcher

	do
	display state change
	process event
	until SM is stable
	*/
	void ecm(struct s_smc *smc, int event)
	{
	int state ;

	do {
	DB_ECM("ECM : state %s%s event %s",
	smc->mib.fddiSMTECMState & AFLAG ? "ACTIONS " : "",
	ecm_states[smc->mib.fddiSMTECMState & ~AFLAG],
	ecm_events[event]);
	state = smc->mib.fddiSMTECMState ;
	ecm_fsm(smc,event) ;
	event = 0 ;
	} while (state != smc->mib.fddiSMTECMState) ;
	ecm_state_change(smc,(int)smc->mib.fddiSMTECMState) ;
	}

	/*
	process ECM event
	*/
	static void ecm_fsm(struct s_smc *smc, int cmd)
	{
	int ls_a ; /* current line state PHY A */
	int ls_b ; /* current line state PHY B */
	int p ; /* ports */


	smc->mib.fddiSMTBypassPresent = sm_pm_bypass_present(smc) ;
	if (cmd == EC_CONNECT)
	smc->mib.fddiSMTRemoteDisconnectFlag = FALSE ;

	/* For AIX event notification: */
	/* Is a disconnect command remotely issued ? */
	if (cmd == EC_DISCONNECT &&
	smc->mib.fddiSMTRemoteDisconnectFlag == TRUE)
	AIX_EVENT (smc, (u_long) CIO_HARD_FAIL, (u_long)
	FDDI_REMOTE_DISCONNECT, smt_get_event_word(smc),
	smt_get_error_word(smc) );

	/jd 05-Aug-1999 Bug #10419 "Port Disconnect fails at Dup MAc Cond."/
	if (cmd == EC_CONNECT) {
	smc->e.DisconnectFlag = FALSE ;
	}
	else if (cmd == EC_DISCONNECT) {
	smc->e.DisconnectFlag = TRUE ;
	}

	switch(smc->mib.fddiSMTECMState) {
	case ACTIONS(EC0_OUT) :
	/*
	* We do not perform a path test
	*/
	smc->e.path_test = PT_PASSED ;
	smc->e.ecm_line_state = FALSE ;
	stop_ecm_timer(smc) ;
	ACTIONS_DONE() ;
	break ;
	case EC0_OUT:
	/EC01/
	if (cmd == EC_CONNECT && !smc->mib.fddiSMTBypassPresent
	&& smc->e.path_test==PT_PASSED) {
	GO_STATE(EC1_IN) ;
	break ;
	}
	/EC05/
	else if (cmd == EC_CONNECT && (smc->e.path_test==PT_PASSED) &&
	smc->mib.fddiSMTBypassPresent &&
	(smc->s.sas == SMT_DAS)) {
	GO_STATE(EC5_INSERT) ;
	break ;
	}
	break;
	case ACTIONS(EC1_IN) :
	stop_ecm_timer(smc) ;
	smc->e.trace_prop = 0 ;
	sm_ma_control(smc,MA_TREQ) ;
	for (p = 0 ; p < NUMPHYS ; p++)
	if (smc->mib.p[p].fddiPORTHardwarePresent)
	queue_event(smc,EVENT_PCMA+p,PC_START) ;
	ACTIONS_DONE() ;
	break ;
	case EC1_IN:
	/EC12/
	if (cmd == EC_TRACE_PROP) {
	prop_actions(smc) ;
	GO_STATE(EC2_TRACE) ;
	break ;
	}
	/EC13/
	else if (cmd == EC_DISCONNECT) {
	GO_STATE(EC3_LEAVE) ;
	break ;
	}
	break;
	case ACTIONS(EC2_TRACE) :
	start_ecm_timer(smc,MIB2US(smc->mib.fddiSMTTrace_MaxExpiration),
	EC_TIMEOUT_TMAX) ;
	ACTIONS_DONE() ;
	break ;
	case EC2_TRACE :
	/EC22/
	if (cmd == EC_TRACE_PROP) {
	prop_actions(smc) ;
	GO_STATE(EC2_TRACE) ;
	break ;
	}
	/EC23a/
	else if (cmd == EC_DISCONNECT) {
	smc->e.path_test = PT_EXITING ;
	GO_STATE(EC3_LEAVE) ;
	break ;
	}
	/EC23b/
	else if (smc->e.path_test == PT_PENDING) {
	GO_STATE(EC3_LEAVE) ;
	break ;
	}
	/EC23c/
	else if (cmd == EC_TIMEOUT_TMAX) {
	/* Trace_Max is expired */
	/* -> send AIX_EVENT */
	AIX_EVENT(smc, (u_long) FDDI_RING_STATUS,
	(u_long) FDDI_SMT_ERROR, (u_long)
	FDDI_TRACE_MAX, smt_get_error_word(smc));
	smc->e.path_test = PT_PENDING ;
	GO_STATE(EC3_LEAVE) ;
	break ;
	}
	break ;
	case ACTIONS(EC3_LEAVE) :
	start_ecm_timer(smc,smc->s.ecm_td_min,EC_TIMEOUT_TD) ;
	for (p = 0 ; p < NUMPHYS ; p++)
	queue_event(smc,EVENT_PCMA+p,PC_STOP) ;
	ACTIONS_DONE() ;
	break ;
	case EC3_LEAVE:
	/EC30/
	if (cmd == EC_TIMEOUT_TD && !smc->mib.fddiSMTBypassPresent &&
	(smc->e.path_test != PT_PENDING)) {
	GO_STATE(EC0_OUT) ;
	break ;
	}
	/EC34/
	else if (cmd == EC_TIMEOUT_TD &&
	(smc->e.path_test == PT_PENDING)) {
	GO_STATE(EC4_PATH_TEST) ;
	break ;
	}
	/EC31/
	else if (cmd == EC_CONNECT && smc->e.path_test == PT_PASSED) {
	GO_STATE(EC1_IN) ;
	break ;
	}
	/EC33/
	else if (cmd == EC_DISCONNECT &&
	smc->e.path_test == PT_PENDING) {
	smc->e.path_test = PT_EXITING ;
	/*
	* stay in state - state will be left via timeout
	*/
	}
	/EC37/
	else if (cmd == EC_TIMEOUT_TD &&
	smc->mib.fddiSMTBypassPresent &&
	smc->e.path_test != PT_PENDING) {
	GO_STATE(EC7_DEINSERT) ;
	break ;
	}
	break ;
	case ACTIONS(EC4_PATH_TEST) :
	stop_ecm_timer(smc) ;
	smc->e.path_test = PT_TESTING ;
	start_ecm_timer(smc,smc->s.ecm_test_done,EC_TEST_DONE) ;
	/* now perform path test ... just a simulation */
	ACTIONS_DONE() ;
	break ;
	case EC4_PATH_TEST :
	/* path test done delay */
	if (cmd == EC_TEST_DONE)
	smc->e.path_test = PT_PASSED ;

	if (smc->e.path_test == PT_FAILED)
	RS_SET(smc,RS_PATHTEST) ;

	/EC40a/
	if (smc->e.path_test == PT_FAILED &&
	!smc->mib.fddiSMTBypassPresent) {
	GO_STATE(EC0_OUT) ;
	break ;
	}
	/EC40b/
	else if (cmd == EC_DISCONNECT &&
	!smc->mib.fddiSMTBypassPresent) {
	GO_STATE(EC0_OUT) ;
	break ;
	}
	/EC41/
	else if (smc->e.path_test == PT_PASSED) {
	GO_STATE(EC1_IN) ;
	break ;
	}
	/EC47a/
	else if (smc->e.path_test == PT_FAILED &&
	smc->mib.fddiSMTBypassPresent) {
	GO_STATE(EC7_DEINSERT) ;
	break ;
	}
	/EC47b/
	else if (cmd == EC_DISCONNECT &&
	smc->mib.fddiSMTBypassPresent) {
	GO_STATE(EC7_DEINSERT) ;
	break ;
	}
	break ;
	case ACTIONS(EC5_INSERT) :
	sm_pm_bypass_req(smc,BP_INSERT);
	start_ecm_timer(smc,smc->s.ecm_in_max,EC_TIMEOUT_INMAX) ;
	ACTIONS_DONE() ;
	break ;
	case EC5_INSERT :
	/EC56/
	if (cmd == EC_TIMEOUT_INMAX) {
	GO_STATE(EC6_CHECK) ;
	break ;
	}
	/EC57/
	else if (cmd == EC_DISCONNECT) {
	GO_STATE(EC7_DEINSERT) ;
	break ;
	}
	break ;
	case ACTIONS(EC6_CHECK) :
	/*
	* in EC6_CHECK, we POLL the line state !
	* check whether both bypass switches have switched.
	*/
	start_ecm_timer(smc,smc->s.ecm_check_poll,0) ;
	smc->e.ecm_line_state = TRUE ; /* flag to pcm: report Q/HLS */
	ACTIONS_DONE() ;
	break ;
	case EC6_CHECK :
	ls_a = sm_pm_get_ls(smc,PA) ;
	ls_b = sm_pm_get_ls(smc,PB) ;

	/EC61/
	if (((ls_a == PC_QLS) \|\| (ls_a == PC_HLS)) &&
	((ls_b == PC_QLS) \|\| (ls_b == PC_HLS)) ) {
	smc->e.sb_flag = FALSE ;
	smc->e.ecm_line_state = FALSE ;
	GO_STATE(EC1_IN) ;
	break ;
	}
	/EC66/
	else if (!smc->e.sb_flag &&
	(((ls_a == PC_ILS) && (ls_b == PC_QLS)) \|\|
	((ls_a == PC_QLS) && (ls_b == PC_ILS)))){
	smc->e.sb_flag = TRUE ;
	DB_ECMN(1, "ECM : EC6_CHECK - stuck bypass");
	AIX_EVENT(smc, (u_long) FDDI_RING_STATUS, (u_long)
	FDDI_SMT_ERROR, (u_long) FDDI_BYPASS_STUCK,
	smt_get_error_word(smc));
	}
	/EC67/
	else if (cmd == EC_DISCONNECT) {
	smc->e.ecm_line_state = FALSE ;
	GO_STATE(EC7_DEINSERT) ;
	break ;
	}
	else {
	/*
	* restart poll
	*/
	start_ecm_timer(smc,smc->s.ecm_check_poll,0) ;
	}
	break ;
	case ACTIONS(EC7_DEINSERT) :
	sm_pm_bypass_req(smc,BP_DEINSERT);
	start_ecm_timer(smc,smc->s.ecm_i_max,EC_TIMEOUT_IMAX) ;
	ACTIONS_DONE() ;
	break ;
	case EC7_DEINSERT:
	/EC70/
	if (cmd == EC_TIMEOUT_IMAX) {
	GO_STATE(EC0_OUT) ;
	break ;
	}
	/EC75/
	else if (cmd == EC_CONNECT && smc->e.path_test == PT_PASSED) {
	GO_STATE(EC5_INSERT) ;
	break ;
	}
	break;
	default:
	SMT_PANIC(smc,SMT_E0107, SMT_E0107_MSG) ;
	break;
	}
	}

	#ifndef CONCENTRATOR
	/*
	* trace propagation actions for SAS & DAS
	*/
	static void prop_actions(struct s_smc *smc)
	{
	int port_in = 0 ;
	int port_out = 0 ;

	RS_SET(smc,RS_EVENT) ;
	switch (smc->s.sas) {
	case SMT_SAS :
	port_in = port_out = pcm_get_s_port(smc) ;
	break ;
	case SMT_DAS :
	port_in = cfm_get_mac_input(smc) ; /* PA or PB */
	port_out = cfm_get_mac_output(smc) ; /* PA or PB */
	break ;
	case SMT_NAC :
	SMT_PANIC(smc,SMT_E0108, SMT_E0108_MSG) ;
	return ;
	}

	DB_ECM("ECM : prop_actions - trace_prop %lu", smc->e.trace_prop);
	DB_ECM("ECM : prop_actions - in %d out %d", port_in, port_out);

	if (smc->e.trace_prop & ENTITY_BIT(ENTITY_MAC)) {
	/* trace initiatior */
	DB_ECM("ECM : initiate TRACE on PHY %c", 'A' + port_in - PA);
	queue_event(smc,EVENT_PCM+port_in,PC_TRACE) ;
	}
	else if ((smc->e.trace_prop & ENTITY_BIT(ENTITY_PHY(PA))) &&
	port_out != PA) {
	/* trace propagate upstream */
	DB_ECM("ECM : propagate TRACE on PHY B");
	queue_event(smc,EVENT_PCMB,PC_TRACE) ;
	}
	else if ((smc->e.trace_prop & ENTITY_BIT(ENTITY_PHY(PB))) &&
	port_out != PB) {
	/* trace propagate upstream */
	DB_ECM("ECM : propagate TRACE on PHY A");
	queue_event(smc,EVENT_PCMA,PC_TRACE) ;
	}
	else {
	/* signal trace termination */
	DB_ECM("ECM : TRACE terminated");
	smc->e.path_test = PT_PENDING ;
	}
	smc->e.trace_prop = 0 ;
	}
	#else
	/*
	* trace propagation actions for Concentrator
	*/
	static void prop_actions(struct s_smc *smc)
	{
	int initiator ;
	int upstream ;
	int p ;

	RS_SET(smc,RS_EVENT) ;
	while (smc->e.trace_prop) {
	DB_ECM("ECM : prop_actions - trace_prop %d",
	smc->e.trace_prop);

	if (smc->e.trace_prop & ENTITY_BIT(ENTITY_MAC)) {
	initiator = ENTITY_MAC ;
	smc->e.trace_prop &= ~ENTITY_BIT(ENTITY_MAC) ;
	DB_ECM("ECM: MAC initiates trace");
	}
	else {
	for (p = NUMPHYS-1 ; p >= 0 ; p--) {
	if (smc->e.trace_prop &
	ENTITY_BIT(ENTITY_PHY(p)))
	break ;
	}
	initiator = ENTITY_PHY(p) ;
	smc->e.trace_prop &= ~ENTITY_BIT(ENTITY_PHY(p)) ;
	}
	upstream = cem_get_upstream(smc,initiator) ;

	if (upstream == ENTITY_MAC) {
	/* signal trace termination */
	DB_ECM("ECM : TRACE terminated");
	smc->e.path_test = PT_PENDING ;
	}
	else {
	/* trace propagate upstream */
	DB_ECM("ECM : propagate TRACE on PHY %d", upstream);
	queue_event(smc,EVENT_PCM+upstream,PC_TRACE) ;
	}
	}
	}
	#endif


	/*
	* SMT timer interface
	* start ECM timer
	*/
	static void start_ecm_timer(struct s_smc *smc, u_long value, int event)
	{
	smt_timer_start(smc,&smc->e.ecm_timer,value,EV_TOKEN(EVENT_ECM,event));
	}

	/*
	* SMT timer interface
	* stop ECM timer
	*/
	static void stop_ecm_timer(struct s_smc *smc)
	{
	if (smc->e.ecm_timer.tm_active)
	smt_timer_stop(smc,&smc->e.ecm_timer) ;
	}