Release 4.7 drivers/net/fddi/skfp/queue.c
/******************************************************************************
*
* (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 Event Queue Management
*/
#include "h/types.h"
#include "h/fddi.h"
#include "h/smc.h"
#ifndef lint
static const char ID_sccs[] = "@(#)queue.c 2.9 97/08/04 (C) SK " ;
#endif
#define PRINTF(a,b,c)
/*
* init event queue management
*/
void ev_init(struct s_smc *smc)
{
smc->q.ev_put = smc->q.ev_get = smc->q.ev_queue ;
}
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/*
* add event to queue
*/
void queue_event(struct s_smc *smc, int class, int event)
{
PRINTF("queue class %d event %d\n",class,event) ;
smc->q.ev_put->class = class ;
smc->q.ev_put->event = event ;
if (++smc->q.ev_put == &smc->q.ev_queue[MAX_EVENT])
smc->q.ev_put = smc->q.ev_queue ;
if (smc->q.ev_put == smc->q.ev_get) {
SMT_ERR_LOG(smc,SMT_E0137, SMT_E0137_MSG) ;
}
}
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/*
* timer_event is called from HW timer package.
*/
void timer_event(struct s_smc *smc, u_long token)
{
PRINTF("timer event class %d token %d\n",
EV_T_CLASS(token),
EV_T_EVENT(token)) ;
queue_event(smc,EV_T_CLASS(token),EV_T_EVENT(token));
}
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/*
* event dispatcher
* while event queue is not empty
* get event from queue
* send command to state machine
* end
*/
void ev_dispatcher(struct s_smc *smc)
{
struct event_queue *ev ; /* pointer into queue */
int class ;
ev = smc->q.ev_get ;
PRINTF("dispatch get %x put %x\n",ev,smc->q.ev_put) ;
while (ev != smc->q.ev_put) {
PRINTF("dispatch class %d event %d\n",ev->class,ev->event) ;
switch(class = ev->class) {
case EVENT_ECM : /* Entity Corordination Man. */
ecm(smc,(int)ev->event) ;
break ;
case EVENT_CFM : /* Configuration Man. */
cfm(smc,(int)ev->event) ;
break ;
case EVENT_RMT : /* Ring Man. */
rmt(smc,(int)ev->event) ;
break ;
case EVENT_SMT :
smt_event(smc,(int)ev->event) ;
break ;
#ifdef CONCENTRATOR
case 99 :
timer_test_event(smc,(int)ev->event) ;
break ;
#endif
case EVENT_PCMA : /* PHY A */
case EVENT_PCMB : /* PHY B */
default :
if (class >= EVENT_PCMA &&
class < EVENT_PCMA + NUMPHYS) {
pcm(smc,class - EVENT_PCMA,(int)ev->event) ;
break ;
}
SMT_PANIC(smc,SMT_E0121, SMT_E0121_MSG) ;
return ;
}
if (++ev == &smc->q.ev_queue[MAX_EVENT])
ev = smc->q.ev_queue ;
/* Renew get: it is used in queue_events to detect overruns */
smc->q.ev_get = ev;
}
}
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/*
* smt_online connects to or disconnects from the ring
* MUST be called to initiate connection establishment
*
* on 0 disconnect
* on 1 connect
*/
u_short smt_online(struct s_smc *smc, int on)
{
queue_event(smc,EVENT_ECM,on ? EC_CONNECT : EC_DISCONNECT) ;
ev_dispatcher(smc) ;
return smc->mib.fddiSMTCF_State;
}
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/*
* set SMT flag to value
* flag flag name
* value flag value
* dump current flag setting
*/
#ifdef CONCENTRATOR
void do_smt_flag(struct s_smc *smc, char *flag, int value)
{
#ifdef DEBUG
struct smt_debug *deb;
SK_UNUSED(smc) ;
#ifdef DEBUG_BRD
deb = &smc->debug;
#else
deb = &debug;
#endif
if (!strcmp(flag,"smt"))
deb->d_smt = value ;
else if (!strcmp(flag,"smtf"))
deb->d_smtf = value ;
else if (!strcmp(flag,"pcm"))
deb->d_pcm = value ;
else if (!strcmp(flag,"rmt"))
deb->d_rmt = value ;
else if (!strcmp(flag,"cfm"))
deb->d_cfm = value ;
else if (!strcmp(flag,"ecm"))
deb->d_ecm = value ;
printf("smt %d\n",deb->d_smt) ;
printf("smtf %d\n",deb->d_smtf) ;
printf("pcm %d\n",deb->d_pcm) ;
printf("rmt %d\n",deb->d_rmt) ;
printf("cfm %d\n",deb->d_cfm) ;
printf("ecm %d\n",deb->d_ecm) ;
#endif /* DEBUG */
}
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#endif
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