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marcus.erl |
/******************************************************************************
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*
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* (C)Copyright 1998,1999 SysKonnect,
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* a business unit of Schneider & Koch & Co. Datensysteme GmbH.
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*
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* See the file "skfddi.c" for further information.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* The information in this file is provided "AS IS" without warranty.
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*
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******************************************************************************/
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/*
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SMT ECM
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Entity Coordination Management
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Hardware independent state machine
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*/
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/*
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* Hardware independent state machine implemantation
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* The following external SMT functions are referenced :
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*
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* queue_event()
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* smt_timer_start()
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* smt_timer_stop()
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*
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* The following external HW dependent functions are referenced :
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* sm_pm_bypass_req()
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* sm_pm_ls_latch()
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* sm_pm_get_ls()
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*
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* The following HW dependent events are required :
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* NONE
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*
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*/
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#include "h/types.h"
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#include "h/fddi.h"
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#include "h/smc.h"
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#define KERNEL
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#include "h/smtstate.h"
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#ifndef lint
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static const char ID_sccs[] = "@(#)ecm.c 2.7 99/08/05 (C) SK " ;
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#endif
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/*
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* FSM Macros
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*/
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#define AFLAG 0x10
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#define GO_STATE(x) (smc->mib.fddiSMTECMState = (x)|AFLAG)
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#define ACTIONS_DONE() (smc->mib.fddiSMTECMState &= ~AFLAG)
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#define ACTIONS(x) (x|AFLAG)
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#define EC0_OUT 0 /* not inserted */
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#define EC1_IN 1 /* inserted */
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#define EC2_TRACE 2 /* tracing */
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#define EC3_LEAVE 3 /* leaving the ring */
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#define EC4_PATH_TEST 4 /* performing path test */
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#define EC5_INSERT 5 /* bypass being turned on */
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#define EC6_CHECK 6 /* checking bypass */
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#define EC7_DEINSERT 7 /* bypass being turnde off */
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#ifdef DEBUG
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/*
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* symbolic state names
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*/
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static const char * const ecm_states[] = {
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"EC0_OUT","EC1_IN","EC2_TRACE","EC3_LEAVE","EC4_PATH_TEST",
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"EC5_INSERT","EC6_CHECK","EC7_DEINSERT"
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} ;
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/*
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* symbolic event names
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*/
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static const char * const ecm_events[] = {
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"NONE","EC_CONNECT","EC_DISCONNECT","EC_TRACE_PROP","EC_PATH_TEST",
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"EC_TIMEOUT_TD","EC_TIMEOUT_TMAX",
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"EC_TIMEOUT_IMAX","EC_TIMEOUT_INMAX","EC_TEST_DONE"
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} ;
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#endif
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/*
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* all Globals are defined in smc.h
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* struct s_ecm
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*/
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/*
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* function declarations
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*/
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static void ecm_fsm(struct s_smc *smc, int cmd);
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static void start_ecm_timer(struct s_smc *smc, u_long value, int event);
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static void stop_ecm_timer(struct s_smc *smc);
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static void prop_actions(struct s_smc *smc);
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/*
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init ECM state machine
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clear all ECM vars and flags
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*/
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void ecm_init(struct s_smc *smc)
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{
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smc->e.path_test = PT_PASSED ;
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smc->e.trace_prop = 0 ;
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smc->e.sb_flag = 0 ;
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smc->mib.fddiSMTECMState = ACTIONS(EC0_OUT) ;
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smc->e.ecm_line_state = FALSE ;
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}
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/*
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ECM state machine
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called by dispatcher
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do
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display state change
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process event
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until SM is stable
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*/
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void ecm(struct s_smc *smc, int event)
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{
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int state ;
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do {
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DB_ECM("ECM : state %s%s",
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(smc->mib.fddiSMTECMState & AFLAG) ? "ACTIONS " : "",
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ecm_states[smc->mib.fddiSMTECMState & ~AFLAG]) ;
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DB_ECM(" event %s\n",ecm_events[event],0) ;
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state = smc->mib.fddiSMTECMState ;
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ecm_fsm(smc,event) ;
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event = 0 ;
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} while (state != smc->mib.fddiSMTECMState) ;
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ecm_state_change(smc,(int)smc->mib.fddiSMTECMState) ;
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}
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/*
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process ECM event
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*/
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static void ecm_fsm(struct s_smc *smc, int cmd)
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{
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int ls_a ; /* current line state PHY A */
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int ls_b ; /* current line state PHY B */
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int p ; /* ports */
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smc->mib.fddiSMTBypassPresent = sm_pm_bypass_present(smc) ;
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if (cmd == EC_CONNECT)
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smc->mib.fddiSMTRemoteDisconnectFlag = FALSE ;
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/* For AIX event notification: */
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/* Is a disconnect command remotely issued ? */
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if (cmd == EC_DISCONNECT &&
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smc->mib.fddiSMTRemoteDisconnectFlag == TRUE)
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AIX_EVENT (smc, (u_long) CIO_HARD_FAIL, (u_long)
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FDDI_REMOTE_DISCONNECT, smt_get_event_word(smc),
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smt_get_error_word(smc) );
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/*jd 05-Aug-1999 Bug #10419 "Port Disconnect fails at Dup MAc Cond."*/
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if (cmd == EC_CONNECT) {
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smc->e.DisconnectFlag = FALSE ;
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}
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else if (cmd == EC_DISCONNECT) {
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smc->e.DisconnectFlag = TRUE ;
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}
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switch(smc->mib.fddiSMTECMState) {
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case ACTIONS(EC0_OUT) :
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/*
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* We do not perform a path test
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*/
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smc->e.path_test = PT_PASSED ;
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smc->e.ecm_line_state = FALSE ;
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stop_ecm_timer(smc) ;
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ACTIONS_DONE() ;
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break ;
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case EC0_OUT:
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/*EC01*/
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if (cmd == EC_CONNECT && !smc->mib.fddiSMTBypassPresent
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&& smc->e.path_test==PT_PASSED) {
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GO_STATE(EC1_IN) ;
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break ;
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}
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/*EC05*/
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else if (cmd == EC_CONNECT && (smc->e.path_test==PT_PASSED) &&
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smc->mib.fddiSMTBypassPresent &&
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(smc->s.sas == SMT_DAS)) {
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GO_STATE(EC5_INSERT) ;
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break ;
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}
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break;
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case ACTIONS(EC1_IN) :
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stop_ecm_timer(smc) ;
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smc->e.trace_prop = 0 ;
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sm_ma_control(smc,MA_TREQ) ;
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for (p = 0 ; p < NUMPHYS ; p++)
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if (smc->mib.p[p].fddiPORTHardwarePresent)
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queue_event(smc,EVENT_PCMA+p,PC_START) ;
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ACTIONS_DONE() ;
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break ;
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case EC1_IN:
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/*EC12*/
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if (cmd == EC_TRACE_PROP) {
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prop_actions(smc) ;
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GO_STATE(EC2_TRACE) ;
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break ;
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}
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/*EC13*/
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else if (cmd == EC_DISCONNECT) {
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GO_STATE(EC3_LEAVE) ;
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break ;
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}
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break;
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case ACTIONS(EC2_TRACE) :
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start_ecm_timer(smc,MIB2US(smc->mib.fddiSMTTrace_MaxExpiration),
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EC_TIMEOUT_TMAX) ;
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ACTIONS_DONE() ;
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break ;
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case EC2_TRACE :
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/*EC22*/
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if (cmd == EC_TRACE_PROP) {
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prop_actions(smc) ;
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GO_STATE(EC2_TRACE) ;
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break ;
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}
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/*EC23a*/
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else if (cmd == EC_DISCONNECT) {
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smc->e.path_test = PT_EXITING ;
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GO_STATE(EC3_LEAVE) ;
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break ;
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}
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/*EC23b*/
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else if (smc->e.path_test == PT_PENDING) {
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GO_STATE(EC3_LEAVE) ;
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break ;
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}
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/*EC23c*/
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else if (cmd == EC_TIMEOUT_TMAX) {
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/* Trace_Max is expired */
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/* -> send AIX_EVENT */
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AIX_EVENT(smc, (u_long) FDDI_RING_STATUS,
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(u_long) FDDI_SMT_ERROR, (u_long)
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FDDI_TRACE_MAX, smt_get_error_word(smc));
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smc->e.path_test = PT_PENDING ;
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GO_STATE(EC3_LEAVE) ;
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break ;
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}
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break ;
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case ACTIONS(EC3_LEAVE) :
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start_ecm_timer(smc,smc->s.ecm_td_min,EC_TIMEOUT_TD) ;
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for (p = 0 ; p < NUMPHYS ; p++)
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queue_event(smc,EVENT_PCMA+p,PC_STOP) ;
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ACTIONS_DONE() ;
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break ;
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case EC3_LEAVE:
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/*EC30*/
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if (cmd == EC_TIMEOUT_TD && !smc->mib.fddiSMTBypassPresent &&
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(smc->e.path_test != PT_PENDING)) {
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GO_STATE(EC0_OUT) ;
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break ;
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| 264 |
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}
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| 265 |
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/*EC34*/
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else if (cmd == EC_TIMEOUT_TD &&
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(smc->e.path_test == PT_PENDING)) {
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GO_STATE(EC4_PATH_TEST) ;
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break ;
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| 270 |
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}
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| 271 |
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/*EC31*/
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| 272 |
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else if (cmd == EC_CONNECT && smc->e.path_test == PT_PASSED) {
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GO_STATE(EC1_IN) ;
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break ;
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| 275 |
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}
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| 276 |
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/*EC33*/
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| 277 |
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else if (cmd == EC_DISCONNECT &&
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| 278 |
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smc->e.path_test == PT_PENDING) {
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smc->e.path_test = PT_EXITING ;
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| 280 |
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/*
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| 281 |
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* stay in state - state will be left via timeout
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| 282 |
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*/
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| 283 |
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}
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| 284 |
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/*EC37*/
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| 285 |
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else if (cmd == EC_TIMEOUT_TD &&
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| 286 |
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smc->mib.fddiSMTBypassPresent &&
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| 287 |
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smc->e.path_test != PT_PENDING) {
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| 288 |
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GO_STATE(EC7_DEINSERT) ;
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| 289 |
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break ;
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| 290 |
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}
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| 291 |
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break ;
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| 292 |
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case ACTIONS(EC4_PATH_TEST) :
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| 293 |
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stop_ecm_timer(smc) ;
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| 294 |
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smc->e.path_test = PT_TESTING ;
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| 295 |
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start_ecm_timer(smc,smc->s.ecm_test_done,EC_TEST_DONE) ;
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| 296 |
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/* now perform path test ... just a simulation */
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| 297 |
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ACTIONS_DONE() ;
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| 298 |
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break ;
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| 299 |
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case EC4_PATH_TEST :
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| 300 |
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/* path test done delay */
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| 301 |
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if (cmd == EC_TEST_DONE)
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| 302 |
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smc->e.path_test = PT_PASSED ;
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| 303 |
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| 304 |
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if (smc->e.path_test == PT_FAILED)
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| 305 |
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RS_SET(smc,RS_PATHTEST) ;
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| 306 |
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| 307 |
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/*EC40a*/
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| 308 |
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if (smc->e.path_test == PT_FAILED &&
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| 309 |
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!smc->mib.fddiSMTBypassPresent) {
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| 310 |
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GO_STATE(EC0_OUT) ;
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| 311 |
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break ;
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| 312 |
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}
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| 313 |
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/*EC40b*/
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| 314 |
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else if (cmd == EC_DISCONNECT &&
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| 315 |
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!smc->mib.fddiSMTBypassPresent) {
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| 316 |
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GO_STATE(EC0_OUT) ;
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| 317 |
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break ;
|
| 318 |
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}
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| 319 |
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/*EC41*/
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| 320 |
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else if (smc->e.path_test == PT_PASSED) {
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| 321 |
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GO_STATE(EC1_IN) ;
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| 322 |
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break ;
|
| 323 |
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}
|
| 324 |
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/*EC47a*/
|
| 325 |
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else if (smc->e.path_test == PT_FAILED &&
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| 326 |
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smc->mib.fddiSMTBypassPresent) {
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| 327 |
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GO_STATE(EC7_DEINSERT) ;
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| 328 |
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break ;
|
| 329 |
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}
|
| 330 |
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/*EC47b*/
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| 331 |
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else if (cmd == EC_DISCONNECT &&
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| 332 |
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smc->mib.fddiSMTBypassPresent) {
|
| 333 |
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GO_STATE(EC7_DEINSERT) ;
|
| 334 |
|
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break ;
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| 335 |
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}
|
| 336 |
|
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break ;
|
| 337 |
|
|
case ACTIONS(EC5_INSERT) :
|
| 338 |
|
|
sm_pm_bypass_req(smc,BP_INSERT);
|
| 339 |
|
|
start_ecm_timer(smc,smc->s.ecm_in_max,EC_TIMEOUT_INMAX) ;
|
| 340 |
|
|
ACTIONS_DONE() ;
|
| 341 |
|
|
break ;
|
| 342 |
|
|
case EC5_INSERT :
|
| 343 |
|
|
/*EC56*/
|
| 344 |
|
|
if (cmd == EC_TIMEOUT_INMAX) {
|
| 345 |
|
|
GO_STATE(EC6_CHECK) ;
|
| 346 |
|
|
break ;
|
| 347 |
|
|
}
|
| 348 |
|
|
/*EC57*/
|
| 349 |
|
|
else if (cmd == EC_DISCONNECT) {
|
| 350 |
|
|
GO_STATE(EC7_DEINSERT) ;
|
| 351 |
|
|
break ;
|
| 352 |
|
|
}
|
| 353 |
|
|
break ;
|
| 354 |
|
|
case ACTIONS(EC6_CHECK) :
|
| 355 |
|
|
/*
|
| 356 |
|
|
* in EC6_CHECK, we *POLL* the line state !
|
| 357 |
|
|
* check whether both bypass switches have switched.
|
| 358 |
|
|
*/
|
| 359 |
|
|
start_ecm_timer(smc,smc->s.ecm_check_poll,0) ;
|
| 360 |
|
|
smc->e.ecm_line_state = TRUE ; /* flag to pcm: report Q/HLS */
|
| 361 |
|
|
(void) sm_pm_ls_latch(smc,PA,1) ; /* enable line state latch */
|
| 362 |
|
|
(void) sm_pm_ls_latch(smc,PB,1) ; /* enable line state latch */
|
| 363 |
|
|
ACTIONS_DONE() ;
|
| 364 |
|
|
break ;
|
| 365 |
|
|
case EC6_CHECK :
|
| 366 |
|
|
ls_a = sm_pm_get_ls(smc,PA) ;
|
| 367 |
|
|
ls_b = sm_pm_get_ls(smc,PB) ;
|
| 368 |
|
|
|
| 369 |
|
|
/*EC61*/
|
| 370 |
|
|
if (((ls_a == PC_QLS) || (ls_a == PC_HLS)) &&
|
| 371 |
|
|
((ls_b == PC_QLS) || (ls_b == PC_HLS)) ) {
|
| 372 |
|
|
smc->e.sb_flag = FALSE ;
|
| 373 |
|
|
smc->e.ecm_line_state = FALSE ;
|
| 374 |
|
|
GO_STATE(EC1_IN) ;
|
| 375 |
|
|
break ;
|
| 376 |
|
|
}
|
| 377 |
|
|
/*EC66*/
|
| 378 |
|
|
else if (!smc->e.sb_flag &&
|
| 379 |
|
|
(((ls_a == PC_ILS) && (ls_b == PC_QLS)) ||
|
| 380 |
|
|
((ls_a == PC_QLS) && (ls_b == PC_ILS)))){
|
| 381 |
|
|
smc->e.sb_flag = TRUE ;
|
| 382 |
|
|
DB_ECMN(1,"ECM : EC6_CHECK - stuck bypass\n",0,0) ;
|
| 383 |
|
|
AIX_EVENT(smc, (u_long) FDDI_RING_STATUS, (u_long)
|
| 384 |
|
|
FDDI_SMT_ERROR, (u_long) FDDI_BYPASS_STUCK,
|
| 385 |
|
|
smt_get_error_word(smc));
|
| 386 |
|
|
}
|
| 387 |
|
|
/*EC67*/
|
| 388 |
|
|
else if (cmd == EC_DISCONNECT) {
|
| 389 |
|
|
smc->e.ecm_line_state = FALSE ;
|
| 390 |
|
|
GO_STATE(EC7_DEINSERT) ;
|
| 391 |
|
|
break ;
|
| 392 |
|
|
}
|
| 393 |
|
|
else {
|
| 394 |
|
|
/*
|
| 395 |
|
|
* restart poll
|
| 396 |
|
|
*/
|
| 397 |
|
|
start_ecm_timer(smc,smc->s.ecm_check_poll,0) ;
|
| 398 |
|
|
}
|
| 399 |
|
|
break ;
|
| 400 |
|
|
case ACTIONS(EC7_DEINSERT) :
|
| 401 |
|
|
sm_pm_bypass_req(smc,BP_DEINSERT);
|
| 402 |
|
|
start_ecm_timer(smc,smc->s.ecm_i_max,EC_TIMEOUT_IMAX) ;
|
| 403 |
|
|
ACTIONS_DONE() ;
|
| 404 |
|
|
break ;
|
| 405 |
|
|
case EC7_DEINSERT:
|
| 406 |
|
|
/*EC70*/
|
| 407 |
|
|
if (cmd == EC_TIMEOUT_IMAX) {
|
| 408 |
|
|
GO_STATE(EC0_OUT) ;
|
| 409 |
|
|
break ;
|
| 410 |
|
|
}
|
| 411 |
|
|
/*EC75*/
|
| 412 |
|
|
else if (cmd == EC_CONNECT && smc->e.path_test == PT_PASSED) {
|
| 413 |
|
|
GO_STATE(EC5_INSERT) ;
|
| 414 |
|
|
break ;
|
| 415 |
|
|
}
|
| 416 |
|
|
break;
|
| 417 |
|
|
default:
|
| 418 |
|
|
SMT_PANIC(smc,SMT_E0107, SMT_E0107_MSG) ;
|
| 419 |
|
|
break;
|
| 420 |
|
|
}
|
| 421 |
|
|
}
|
| 422 |
|
|
|
| 423 |
|
|
#ifndef CONCENTRATOR
|
| 424 |
|
|
/*
|
| 425 |
|
|
* trace propagation actions for SAS & DAS
|
| 426 |
|
|
*/
|
| 427 |
|
|
static void prop_actions(struct s_smc *smc)
|
| 428 |
|
|
{
|
| 429 |
|
|
int port_in = 0 ;
|
| 430 |
|
|
int port_out = 0 ;
|
| 431 |
|
|
|
| 432 |
|
|
RS_SET(smc,RS_EVENT) ;
|
| 433 |
|
|
switch (smc->s.sas) {
|
| 434 |
|
|
case SMT_SAS :
|
| 435 |
|
|
port_in = port_out = pcm_get_s_port(smc) ;
|
| 436 |
|
|
break ;
|
| 437 |
|
|
case SMT_DAS :
|
| 438 |
|
|
port_in = cfm_get_mac_input(smc) ; /* PA or PB */
|
| 439 |
|
|
port_out = cfm_get_mac_output(smc) ; /* PA or PB */
|
| 440 |
|
|
break ;
|
| 441 |
|
|
case SMT_NAC :
|
| 442 |
|
|
SMT_PANIC(smc,SMT_E0108, SMT_E0108_MSG) ;
|
| 443 |
|
|
return ;
|
| 444 |
|
|
}
|
| 445 |
|
|
|
| 446 |
|
|
DB_ECM("ECM : prop_actions - trace_prop %d\n", smc->e.trace_prop,0) ;
|
| 447 |
|
|
DB_ECM("ECM : prop_actions - in %d out %d\n", port_in,port_out) ;
|
| 448 |
|
|
|
| 449 |
|
|
if (smc->e.trace_prop & ENTITY_BIT(ENTITY_MAC)) {
|
| 450 |
|
|
/* trace initiatior */
|
| 451 |
|
|
DB_ECM("ECM : initiate TRACE on PHY %c\n",'A'+port_in-PA,0) ;
|
| 452 |
|
|
queue_event(smc,EVENT_PCM+port_in,PC_TRACE) ;
|
| 453 |
|
|
}
|
| 454 |
|
|
else if ((smc->e.trace_prop & ENTITY_BIT(ENTITY_PHY(PA))) &&
|
| 455 |
|
|
port_out != PA) {
|
| 456 |
|
|
/* trace propagate upstream */
|
| 457 |
|
|
DB_ECM("ECM : propagate TRACE on PHY B\n",0,0) ;
|
| 458 |
|
|
queue_event(smc,EVENT_PCMB,PC_TRACE) ;
|
| 459 |
|
|
}
|
| 460 |
|
|
else if ((smc->e.trace_prop & ENTITY_BIT(ENTITY_PHY(PB))) &&
|
| 461 |
|
|
port_out != PB) {
|
| 462 |
|
|
/* trace propagate upstream */
|
| 463 |
|
|
DB_ECM("ECM : propagate TRACE on PHY A\n",0,0) ;
|
| 464 |
|
|
queue_event(smc,EVENT_PCMA,PC_TRACE) ;
|
| 465 |
|
|
}
|
| 466 |
|
|
else {
|
| 467 |
|
|
/* signal trace termination */
|
| 468 |
|
|
DB_ECM("ECM : TRACE terminated\n",0,0) ;
|
| 469 |
|
|
smc->e.path_test = PT_PENDING ;
|
| 470 |
|
|
}
|
| 471 |
|
|
smc->e.trace_prop = 0 ;
|
| 472 |
|
|
}
|
| 473 |
|
|
#else
|
| 474 |
|
|
/*
|
| 475 |
|
|
* trace propagation actions for Concentrator
|
| 476 |
|
|
*/
|
| 477 |
|
|
static void prop_actions(struct s_smc *smc)
|
| 478 |
|
|
{
|
| 479 |
|
|
int initiator ;
|
| 480 |
|
|
int upstream ;
|
| 481 |
|
|
int p ;
|
| 482 |
|
|
|
| 483 |
|
|
RS_SET(smc,RS_EVENT) ;
|
| 484 |
|
|
while (smc->e.trace_prop) {
|
| 485 |
|
|
DB_ECM("ECM : prop_actions - trace_prop %d\n",
|
| 486 |
|
|
smc->e.trace_prop,0) ;
|
| 487 |
|
|
|
| 488 |
|
|
if (smc->e.trace_prop & ENTITY_BIT(ENTITY_MAC)) {
|
| 489 |
|
|
initiator = ENTITY_MAC ;
|
| 490 |
|
|
smc->e.trace_prop &= ~ENTITY_BIT(ENTITY_MAC) ;
|
| 491 |
|
|
DB_ECM("ECM: MAC initiates trace\n",0,0) ;
|
| 492 |
|
|
}
|
| 493 |
|
|
else {
|
| 494 |
|
|
for (p = NUMPHYS-1 ; p >= 0 ; p--) {
|
| 495 |
|
|
if (smc->e.trace_prop &
|
| 496 |
|
|
ENTITY_BIT(ENTITY_PHY(p)))
|
| 497 |
|
|
break ;
|
| 498 |
|
|
}
|
| 499 |
|
|
initiator = ENTITY_PHY(p) ;
|
| 500 |
|
|
smc->e.trace_prop &= ~ENTITY_BIT(ENTITY_PHY(p)) ;
|
| 501 |
|
|
}
|
| 502 |
|
|
upstream = cem_get_upstream(smc,initiator) ;
|
| 503 |
|
|
|
| 504 |
|
|
if (upstream == ENTITY_MAC) {
|
| 505 |
|
|
/* signal trace termination */
|
| 506 |
|
|
DB_ECM("ECM : TRACE terminated\n",0,0) ;
|
| 507 |
|
|
smc->e.path_test = PT_PENDING ;
|
| 508 |
|
|
}
|
| 509 |
|
|
else {
|
| 510 |
|
|
/* trace propagate upstream */
|
| 511 |
|
|
DB_ECM("ECM : propagate TRACE on PHY %d\n",upstream,0) ;
|
| 512 |
|
|
queue_event(smc,EVENT_PCM+upstream,PC_TRACE) ;
|
| 513 |
|
|
}
|
| 514 |
|
|
}
|
| 515 |
|
|
}
|
| 516 |
|
|
#endif
|
| 517 |
|
|
|
| 518 |
|
|
|
| 519 |
|
|
/*
|
| 520 |
|
|
* SMT timer interface
|
| 521 |
|
|
* start ECM timer
|
| 522 |
|
|
*/
|
| 523 |
|
|
static void start_ecm_timer(struct s_smc *smc, u_long value, int event)
|
| 524 |
|
|
{
|
| 525 |
|
|
smt_timer_start(smc,&smc->e.ecm_timer,value,EV_TOKEN(EVENT_ECM,event));
|
| 526 |
|
|
}
|
| 527 |
|
|
|
| 528 |
|
|
/*
|
| 529 |
|
|
* SMT timer interface
|
| 530 |
|
|
* stop ECM timer
|
| 531 |
|
|
*/
|
| 532 |
|
|
static void stop_ecm_timer(struct s_smc *smc)
|
| 533 |
|
|
{
|
| 534 |
|
|
if (smc->e.ecm_timer.tm_active)
|
| 535 |
|
|
smt_timer_stop(smc,&smc->e.ecm_timer) ;
|
| 536 |
|
|
}
|
