ecm.c
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上传日期:2013-02-24
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- /******************************************************************************
- *
- * (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 ECM
- Entity Coordination Management
- Hardware independant state machine
- */
- /*
- * 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_pm_bypass_req()
- * sm_pm_ls_latch()
- * sm_pm_get_ls()
- *
- * The following HW dependant 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 */
- #ifdef DEBUG
- /*
- * 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"
- } ;
- #endif
- /*
- * all Globals are defined in smc.h
- * struct s_ecm
- */
- /*
- * function declarations
- */
- static void ecm_fsm() ;
- static void start_ecm_timer() ;
- static void stop_ecm_timer() ;
- static void prop_actions() ;
- /*
- init ECM state machine
- clear all ECM vars and flags
- */
- void ecm_init(smc)
- 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(smc,event)
- struct s_smc *smc ;
- int event ;
- {
- int state ;
- do {
- DB_ECM("ECM : state %s%s",
- (smc->mib.fddiSMTECMState & AFLAG) ? "ACTIONS " : "",
- ecm_states[smc->mib.fddiSMTECMState & ~AFLAG]) ;
- DB_ECM(" event %sn",ecm_events[event],0) ;
- 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(smc,cmd)
- 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 */
- (void) sm_pm_ls_latch(smc,PA,1) ; /* enable line state latch */
- (void) sm_pm_ls_latch(smc,PB,1) ; /* enable line state latch */
- 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 bypassn",0,0) ;
- 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(smc)
- 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 %dn", smc->e.trace_prop,0) ;
- DB_ECM("ECM : prop_actions - in %d out %dn", port_in,port_out) ;
- if (smc->e.trace_prop & ENTITY_BIT(ENTITY_MAC)) {
- /* trace initiatior */
- DB_ECM("ECM : initiate TRACE on PHY %cn",'A'+port_in-PA,0) ;
- 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 Bn",0,0) ;
- 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 An",0,0) ;
- queue_event(smc,EVENT_PCMA,PC_TRACE) ;
- }
- else {
- /* signal trace termination */
- DB_ECM("ECM : TRACE terminatedn",0,0) ;
- smc->e.path_test = PT_PENDING ;
- }
- smc->e.trace_prop = 0 ;
- }
- #else
- /*
- * trace propagation actions for Concentrator
- */
- static void prop_actions(smc)
- 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 %dn",
- smc->e.trace_prop,0) ;
- 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 tracen",0,0) ;
- }
- 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 terminatedn",0,0) ;
- smc->e.path_test = PT_PENDING ;
- }
- else {
- /* trace propagate upstream */
- DB_ECM("ECM : propagate TRACE on PHY %dn",upstream,0) ;
- queue_event(smc,EVENT_PCM+upstream,PC_TRACE) ;
- }
- }
- }
- #endif
- /*
- * SMT timer interface
- * start ECM timer
- */
- static void start_ecm_timer(smc,value,event)
- 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(smc)
- struct s_smc *smc ;
- {
- if (smc->e.ecm_timer.tm_active)
- smt_timer_stop(smc,&smc->e.ecm_timer) ;
- }