609 lines
16 KiB
C
609 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/******************************************************************************
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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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* 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 CFM
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Configuration Management
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DAS with single MAC
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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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*
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* The following external HW dependent functions are referenced :
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* config_mux()
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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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#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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/*
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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.fddiSMTCF_State = (x)|AFLAG)
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#define ACTIONS_DONE() (smc->mib.fddiSMTCF_State &= ~AFLAG)
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#define ACTIONS(x) (x|AFLAG)
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/*
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* symbolic state names
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*/
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static const char * const cfm_states[] = {
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"SC0_ISOLATED","CF1","CF2","CF3","CF4",
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"SC1_WRAP_A","SC2_WRAP_B","SC5_TRHU_B","SC7_WRAP_S",
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"SC9_C_WRAP_A","SC10_C_WRAP_B","SC11_C_WRAP_S","SC4_THRU_A"
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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 cfm_events[] = {
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"NONE","CF_LOOP_A","CF_LOOP_B","CF_JOIN_A","CF_JOIN_B"
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} ;
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/*
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* map from state to downstream port type
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*/
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static const unsigned char cf_to_ptype[] = {
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TNONE,TNONE,TNONE,TNONE,TNONE,
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TNONE,TB,TB,TS,
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TA,TB,TS,TB
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} ;
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/*
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* CEM port states
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*/
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#define CEM_PST_DOWN 0
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#define CEM_PST_UP 1
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#define CEM_PST_HOLD 2
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/* define portstate array only for A and B port */
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/* Do this within the smc structure (use in multiple cards) */
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/*
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* all Globals are defined in smc.h
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* struct s_cfm
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*/
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/*
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* function declarations
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*/
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static void cfm_fsm(struct s_smc *smc, int cmd);
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/*
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init CFM state machine
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clear all CFM vars and flags
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*/
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void cfm_init(struct s_smc *smc)
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{
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smc->mib.fddiSMTCF_State = ACTIONS(SC0_ISOLATED) ;
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smc->r.rm_join = 0 ;
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smc->r.rm_loop = 0 ;
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smc->y[PA].scrub = 0 ;
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smc->y[PB].scrub = 0 ;
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smc->y[PA].cem_pst = CEM_PST_DOWN ;
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smc->y[PB].cem_pst = CEM_PST_DOWN ;
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}
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/* Some terms conditions used by the selection criteria */
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#define THRU_ENABLED(smc) (smc->y[PA].pc_mode != PM_TREE && \
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smc->y[PB].pc_mode != PM_TREE)
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/* Selection criteria for the ports */
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static void selection_criteria (struct s_smc *smc, struct s_phy *phy)
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{
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switch (phy->mib->fddiPORTMy_Type) {
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case TA:
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if ( !THRU_ENABLED(smc) && smc->y[PB].cf_join ) {
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phy->wc_flag = TRUE ;
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} else {
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phy->wc_flag = FALSE ;
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}
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break;
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case TB:
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/* take precedence over PA */
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phy->wc_flag = FALSE ;
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break;
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case TS:
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phy->wc_flag = FALSE ;
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break;
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case TM:
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phy->wc_flag = FALSE ;
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break;
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}
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}
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void all_selection_criteria(struct s_smc *smc)
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{
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struct s_phy *phy ;
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int p ;
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for ( p = 0,phy = smc->y ; p < NUMPHYS; p++, phy++ ) {
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/* Do the selection criteria */
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selection_criteria (smc,phy);
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}
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}
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static void cem_priv_state(struct s_smc *smc, int event)
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/* State machine for private PORT states: used to optimize dual homing */
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{
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int np; /* Number of the port */
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int i;
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/* Do this only in a DAS */
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if (smc->s.sas != SMT_DAS )
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return ;
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np = event - CF_JOIN;
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if (np != PA && np != PB) {
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return ;
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}
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/* Change the port state according to the event (portnumber) */
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if (smc->y[np].cf_join) {
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smc->y[np].cem_pst = CEM_PST_UP ;
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} else if (!smc->y[np].wc_flag) {
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/* set the port to done only if it is not withheld */
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smc->y[np].cem_pst = CEM_PST_DOWN ;
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}
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/* Don't set an hold port to down */
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/* Check all ports of restart conditions */
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for (i = 0 ; i < 2 ; i ++ ) {
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/* Check all port for PORT is on hold and no withhold is done */
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if ( smc->y[i].cem_pst == CEM_PST_HOLD && !smc->y[i].wc_flag ) {
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smc->y[i].cem_pst = CEM_PST_DOWN;
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queue_event(smc,(int)(EVENT_PCM+i),PC_START) ;
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}
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if ( smc->y[i].cem_pst == CEM_PST_UP && smc->y[i].wc_flag ) {
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smc->y[i].cem_pst = CEM_PST_HOLD;
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queue_event(smc,(int)(EVENT_PCM+i),PC_START) ;
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}
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if ( smc->y[i].cem_pst == CEM_PST_DOWN && smc->y[i].wc_flag ) {
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/*
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* The port must be restarted when the wc_flag
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* will be reset. So set the port on hold.
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*/
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smc->y[i].cem_pst = CEM_PST_HOLD;
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}
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}
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return ;
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}
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/*
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CFM 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 cfm(struct s_smc *smc, int event)
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{
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int state ; /* remember last state */
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int cond ;
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/* We will do the following: */
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/* - compute the variable WC_Flag for every port (This is where */
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/* we can extend the requested path checking !!) */
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/* - do the old (SMT 6.2 like) state machine */
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/* - do the resulting station states */
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all_selection_criteria (smc);
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/* We will check now whether a state transition is allowed or not */
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/* - change the portstates */
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cem_priv_state (smc, event);
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do {
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DB_CFM("CFM : state %s%s event %s",
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smc->mib.fddiSMTCF_State & AFLAG ? "ACTIONS " : "",
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cfm_states[smc->mib.fddiSMTCF_State & ~AFLAG],
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cfm_events[event]);
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state = smc->mib.fddiSMTCF_State ;
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cfm_fsm(smc,event) ;
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event = 0 ;
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} while (state != smc->mib.fddiSMTCF_State) ;
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#ifndef SLIM_SMT
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/*
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* check peer wrap condition
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*/
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cond = FALSE ;
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if ( (smc->mib.fddiSMTCF_State == SC9_C_WRAP_A &&
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smc->y[PA].pc_mode == PM_PEER) ||
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(smc->mib.fddiSMTCF_State == SC10_C_WRAP_B &&
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smc->y[PB].pc_mode == PM_PEER) ||
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(smc->mib.fddiSMTCF_State == SC11_C_WRAP_S &&
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smc->y[PS].pc_mode == PM_PEER &&
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smc->y[PS].mib->fddiPORTNeighborType != TS ) ) {
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cond = TRUE ;
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}
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if (cond != smc->mib.fddiSMTPeerWrapFlag)
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smt_srf_event(smc,SMT_COND_SMT_PEER_WRAP,0,cond) ;
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/*
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* Don't ever send MAC_PATH_CHANGE events. Our MAC is hard-wired
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* to the primary path.
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*/
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#endif /* no SLIM_SMT */
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/*
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* set MAC port type
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*/
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smc->mib.m[MAC0].fddiMACDownstreamPORTType =
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cf_to_ptype[smc->mib.fddiSMTCF_State] ;
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cfm_state_change(smc,(int)smc->mib.fddiSMTCF_State) ;
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}
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/*
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process CFM event
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*/
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/*ARGSUSED1*/
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static void cfm_fsm(struct s_smc *smc, int cmd)
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{
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switch(smc->mib.fddiSMTCF_State) {
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case ACTIONS(SC0_ISOLATED) :
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smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_ISOLATED ;
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smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_ISOLATED ;
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smc->mib.p[PA].fddiPORTMACPlacement = 0 ;
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smc->mib.p[PB].fddiPORTMACPlacement = 0 ;
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smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_SEPA ;
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config_mux(smc,MUX_ISOLATE) ; /* configure PHY Mux */
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smc->r.rm_loop = FALSE ;
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smc->r.rm_join = FALSE ;
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queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
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/* Don't do the WC-Flag changing here */
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ACTIONS_DONE() ;
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DB_CFMN(1, "CFM : %s", cfm_states[smc->mib.fddiSMTCF_State]);
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break;
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case SC0_ISOLATED :
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/*SC07*/
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/*SAS port can be PA or PB ! */
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if (smc->s.sas && (smc->y[PA].cf_join || smc->y[PA].cf_loop ||
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smc->y[PB].cf_join || smc->y[PB].cf_loop)) {
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GO_STATE(SC11_C_WRAP_S) ;
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break ;
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}
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/*SC01*/
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if ((smc->y[PA].cem_pst == CEM_PST_UP && smc->y[PA].cf_join &&
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!smc->y[PA].wc_flag) || smc->y[PA].cf_loop) {
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GO_STATE(SC9_C_WRAP_A) ;
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break ;
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}
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/*SC02*/
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if ((smc->y[PB].cem_pst == CEM_PST_UP && smc->y[PB].cf_join &&
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!smc->y[PB].wc_flag) || smc->y[PB].cf_loop) {
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GO_STATE(SC10_C_WRAP_B) ;
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break ;
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}
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break ;
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case ACTIONS(SC9_C_WRAP_A) :
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smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_CONCATENATED ;
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smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_ISOLATED ;
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smc->mib.p[PA].fddiPORTMACPlacement = INDEX_MAC ;
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smc->mib.p[PB].fddiPORTMACPlacement = 0 ;
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smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_CON ;
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config_mux(smc,MUX_WRAPA) ; /* configure PHY mux */
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if (smc->y[PA].cf_loop) {
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smc->r.rm_join = FALSE ;
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smc->r.rm_loop = TRUE ;
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queue_event(smc,EVENT_RMT,RM_LOOP) ;/* signal RMT */
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}
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if (smc->y[PA].cf_join) {
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smc->r.rm_loop = FALSE ;
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smc->r.rm_join = TRUE ;
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queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
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}
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ACTIONS_DONE() ;
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DB_CFMN(1, "CFM : %s", cfm_states[smc->mib.fddiSMTCF_State]);
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break ;
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case SC9_C_WRAP_A :
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/*SC10*/
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if ( (smc->y[PA].wc_flag || !smc->y[PA].cf_join) &&
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!smc->y[PA].cf_loop ) {
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GO_STATE(SC0_ISOLATED) ;
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break ;
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}
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/*SC12*/
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else if ( (smc->y[PB].cf_loop && smc->y[PA].cf_join &&
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smc->y[PA].cem_pst == CEM_PST_UP) ||
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((smc->y[PB].cf_loop ||
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(smc->y[PB].cf_join &&
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smc->y[PB].cem_pst == CEM_PST_UP)) &&
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(smc->y[PA].pc_mode == PM_TREE ||
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smc->y[PB].pc_mode == PM_TREE))) {
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smc->y[PA].scrub = TRUE ;
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GO_STATE(SC10_C_WRAP_B) ;
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break ;
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}
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/*SC14*/
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else if (!smc->s.attach_s &&
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smc->y[PA].cf_join &&
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smc->y[PA].cem_pst == CEM_PST_UP &&
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smc->y[PA].pc_mode == PM_PEER && smc->y[PB].cf_join &&
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smc->y[PB].cem_pst == CEM_PST_UP &&
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smc->y[PB].pc_mode == PM_PEER) {
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smc->y[PA].scrub = TRUE ;
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smc->y[PB].scrub = TRUE ;
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GO_STATE(SC4_THRU_A) ;
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break ;
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}
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/*SC15*/
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else if ( smc->s.attach_s &&
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smc->y[PA].cf_join &&
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smc->y[PA].cem_pst == CEM_PST_UP &&
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smc->y[PA].pc_mode == PM_PEER &&
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smc->y[PB].cf_join &&
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smc->y[PB].cem_pst == CEM_PST_UP &&
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smc->y[PB].pc_mode == PM_PEER) {
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smc->y[PA].scrub = TRUE ;
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smc->y[PB].scrub = TRUE ;
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GO_STATE(SC5_THRU_B) ;
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break ;
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}
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break ;
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case ACTIONS(SC10_C_WRAP_B) :
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smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_ISOLATED ;
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smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_CONCATENATED ;
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smc->mib.p[PA].fddiPORTMACPlacement = 0 ;
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smc->mib.p[PB].fddiPORTMACPlacement = INDEX_MAC ;
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smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_CON ;
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config_mux(smc,MUX_WRAPB) ; /* configure PHY mux */
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if (smc->y[PB].cf_loop) {
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smc->r.rm_join = FALSE ;
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smc->r.rm_loop = TRUE ;
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queue_event(smc,EVENT_RMT,RM_LOOP) ;/* signal RMT */
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}
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if (smc->y[PB].cf_join) {
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smc->r.rm_loop = FALSE ;
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smc->r.rm_join = TRUE ;
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queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
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}
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ACTIONS_DONE() ;
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DB_CFMN(1, "CFM : %s", cfm_states[smc->mib.fddiSMTCF_State]);
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break ;
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case SC10_C_WRAP_B :
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/*SC20*/
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if ( !smc->y[PB].cf_join && !smc->y[PB].cf_loop ) {
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GO_STATE(SC0_ISOLATED) ;
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break ;
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}
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/*SC21*/
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else if ( smc->y[PA].cf_loop && smc->y[PA].pc_mode == PM_PEER &&
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smc->y[PB].cf_join && smc->y[PB].pc_mode == PM_PEER) {
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smc->y[PB].scrub = TRUE ;
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GO_STATE(SC9_C_WRAP_A) ;
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break ;
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}
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/*SC24*/
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else if (!smc->s.attach_s &&
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smc->y[PA].cf_join && smc->y[PA].pc_mode == PM_PEER &&
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smc->y[PB].cf_join && smc->y[PB].pc_mode == PM_PEER) {
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smc->y[PA].scrub = TRUE ;
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smc->y[PB].scrub = TRUE ;
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GO_STATE(SC4_THRU_A) ;
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break ;
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}
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/*SC25*/
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else if ( smc->s.attach_s &&
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smc->y[PA].cf_join && smc->y[PA].pc_mode == PM_PEER &&
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smc->y[PB].cf_join && smc->y[PB].pc_mode == PM_PEER) {
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smc->y[PA].scrub = TRUE ;
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smc->y[PB].scrub = TRUE ;
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GO_STATE(SC5_THRU_B) ;
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break ;
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}
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break ;
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case ACTIONS(SC4_THRU_A) :
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smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_THRU ;
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smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_THRU ;
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smc->mib.p[PA].fddiPORTMACPlacement = 0 ;
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smc->mib.p[PB].fddiPORTMACPlacement = INDEX_MAC ;
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smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_THRU ;
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config_mux(smc,MUX_THRUA) ; /* configure PHY mux */
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smc->r.rm_loop = FALSE ;
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smc->r.rm_join = TRUE ;
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queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
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ACTIONS_DONE() ;
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DB_CFMN(1, "CFM : %s", cfm_states[smc->mib.fddiSMTCF_State]);
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break ;
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case SC4_THRU_A :
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/*SC41*/
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if (smc->y[PB].wc_flag || !smc->y[PB].cf_join) {
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smc->y[PA].scrub = TRUE ;
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GO_STATE(SC9_C_WRAP_A) ;
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break ;
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}
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/*SC42*/
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else if (!smc->y[PA].cf_join || smc->y[PA].wc_flag) {
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smc->y[PB].scrub = TRUE ;
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GO_STATE(SC10_C_WRAP_B) ;
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break ;
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}
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/*SC45*/
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else if (smc->s.attach_s) {
|
|
smc->y[PB].scrub = TRUE ;
|
|
GO_STATE(SC5_THRU_B) ;
|
|
break ;
|
|
}
|
|
break ;
|
|
case ACTIONS(SC5_THRU_B) :
|
|
smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_THRU ;
|
|
smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_THRU ;
|
|
smc->mib.p[PA].fddiPORTMACPlacement = INDEX_MAC ;
|
|
smc->mib.p[PB].fddiPORTMACPlacement = 0 ;
|
|
smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_THRU ;
|
|
config_mux(smc,MUX_THRUB) ; /* configure PHY mux */
|
|
smc->r.rm_loop = FALSE ;
|
|
smc->r.rm_join = TRUE ;
|
|
queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
|
|
ACTIONS_DONE() ;
|
|
DB_CFMN(1, "CFM : %s", cfm_states[smc->mib.fddiSMTCF_State]);
|
|
break ;
|
|
case SC5_THRU_B :
|
|
/*SC51*/
|
|
if (!smc->y[PB].cf_join || smc->y[PB].wc_flag) {
|
|
smc->y[PA].scrub = TRUE ;
|
|
GO_STATE(SC9_C_WRAP_A) ;
|
|
break ;
|
|
}
|
|
/*SC52*/
|
|
else if (!smc->y[PA].cf_join || smc->y[PA].wc_flag) {
|
|
smc->y[PB].scrub = TRUE ;
|
|
GO_STATE(SC10_C_WRAP_B) ;
|
|
break ;
|
|
}
|
|
/*SC54*/
|
|
else if (!smc->s.attach_s) {
|
|
smc->y[PA].scrub = TRUE ;
|
|
GO_STATE(SC4_THRU_A) ;
|
|
break ;
|
|
}
|
|
break ;
|
|
case ACTIONS(SC11_C_WRAP_S) :
|
|
smc->mib.p[PS].fddiPORTCurrentPath = MIB_PATH_CONCATENATED ;
|
|
smc->mib.p[PS].fddiPORTMACPlacement = INDEX_MAC ;
|
|
smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_CON ;
|
|
config_mux(smc,MUX_WRAPS) ; /* configure PHY mux */
|
|
if (smc->y[PA].cf_loop || smc->y[PB].cf_loop) {
|
|
smc->r.rm_join = FALSE ;
|
|
smc->r.rm_loop = TRUE ;
|
|
queue_event(smc,EVENT_RMT,RM_LOOP) ;/* signal RMT */
|
|
}
|
|
if (smc->y[PA].cf_join || smc->y[PB].cf_join) {
|
|
smc->r.rm_loop = FALSE ;
|
|
smc->r.rm_join = TRUE ;
|
|
queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
|
|
}
|
|
ACTIONS_DONE() ;
|
|
DB_CFMN(1, "CFM : %s", cfm_states[smc->mib.fddiSMTCF_State]);
|
|
break ;
|
|
case SC11_C_WRAP_S :
|
|
/*SC70*/
|
|
if ( !smc->y[PA].cf_join && !smc->y[PA].cf_loop &&
|
|
!smc->y[PB].cf_join && !smc->y[PB].cf_loop) {
|
|
GO_STATE(SC0_ISOLATED) ;
|
|
break ;
|
|
}
|
|
break ;
|
|
default:
|
|
SMT_PANIC(smc,SMT_E0106, SMT_E0106_MSG) ;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* get MAC's input Port
|
|
* return :
|
|
* PA or PB
|
|
*/
|
|
int cfm_get_mac_input(struct s_smc *smc)
|
|
{
|
|
return (smc->mib.fddiSMTCF_State == SC10_C_WRAP_B ||
|
|
smc->mib.fddiSMTCF_State == SC5_THRU_B) ? PB : PA;
|
|
}
|
|
|
|
/*
|
|
* get MAC's output Port
|
|
* return :
|
|
* PA or PB
|
|
*/
|
|
int cfm_get_mac_output(struct s_smc *smc)
|
|
{
|
|
return (smc->mib.fddiSMTCF_State == SC10_C_WRAP_B ||
|
|
smc->mib.fddiSMTCF_State == SC4_THRU_A) ? PB : PA;
|
|
}
|
|
|
|
static char path_iso[] = {
|
|
0,0, 0,RES_PORT, 0,PA + INDEX_PORT, 0,PATH_ISO,
|
|
0,0, 0,RES_MAC, 0,INDEX_MAC, 0,PATH_ISO,
|
|
0,0, 0,RES_PORT, 0,PB + INDEX_PORT, 0,PATH_ISO
|
|
} ;
|
|
|
|
static char path_wrap_a[] = {
|
|
0,0, 0,RES_PORT, 0,PA + INDEX_PORT, 0,PATH_PRIM,
|
|
0,0, 0,RES_MAC, 0,INDEX_MAC, 0,PATH_PRIM,
|
|
0,0, 0,RES_PORT, 0,PB + INDEX_PORT, 0,PATH_ISO
|
|
} ;
|
|
|
|
static char path_wrap_b[] = {
|
|
0,0, 0,RES_PORT, 0,PB + INDEX_PORT, 0,PATH_PRIM,
|
|
0,0, 0,RES_MAC, 0,INDEX_MAC, 0,PATH_PRIM,
|
|
0,0, 0,RES_PORT, 0,PA + INDEX_PORT, 0,PATH_ISO
|
|
} ;
|
|
|
|
static char path_thru[] = {
|
|
0,0, 0,RES_PORT, 0,PA + INDEX_PORT, 0,PATH_PRIM,
|
|
0,0, 0,RES_MAC, 0,INDEX_MAC, 0,PATH_PRIM,
|
|
0,0, 0,RES_PORT, 0,PB + INDEX_PORT, 0,PATH_PRIM
|
|
} ;
|
|
|
|
static char path_wrap_s[] = {
|
|
0,0, 0,RES_PORT, 0,PS + INDEX_PORT, 0,PATH_PRIM,
|
|
0,0, 0,RES_MAC, 0,INDEX_MAC, 0,PATH_PRIM,
|
|
} ;
|
|
|
|
static char path_iso_s[] = {
|
|
0,0, 0,RES_PORT, 0,PS + INDEX_PORT, 0,PATH_ISO,
|
|
0,0, 0,RES_MAC, 0,INDEX_MAC, 0,PATH_ISO,
|
|
} ;
|
|
|
|
int cem_build_path(struct s_smc *smc, char *to, int path_index)
|
|
{
|
|
char *path ;
|
|
int len ;
|
|
|
|
switch (smc->mib.fddiSMTCF_State) {
|
|
default :
|
|
case SC0_ISOLATED :
|
|
path = smc->s.sas ? path_iso_s : path_iso ;
|
|
len = smc->s.sas ? sizeof(path_iso_s) : sizeof(path_iso) ;
|
|
break ;
|
|
case SC9_C_WRAP_A :
|
|
path = path_wrap_a ;
|
|
len = sizeof(path_wrap_a) ;
|
|
break ;
|
|
case SC10_C_WRAP_B :
|
|
path = path_wrap_b ;
|
|
len = sizeof(path_wrap_b) ;
|
|
break ;
|
|
case SC4_THRU_A :
|
|
path = path_thru ;
|
|
len = sizeof(path_thru) ;
|
|
break ;
|
|
case SC11_C_WRAP_S :
|
|
path = path_wrap_s ;
|
|
len = sizeof(path_wrap_s) ;
|
|
break ;
|
|
}
|
|
memcpy(to,path,len) ;
|
|
|
|
LINT_USE(path_index);
|
|
|
|
return len;
|
|
}
|