Release 4.11 drivers/net/fddi/skfp/ecm.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 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_ls_latch()
* 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 ;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 52 | 98.11% | 1 | 50.00% |
| Stephen Hemminger | 1 | 1.89% | 1 | 50.00% |
| Total | 53 | 100.00% | 2 | 100.00% |
/*
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) ;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 94 | 96.91% | 1 | 33.33% |
| Stephen Hemminger | 2 | 2.06% | 1 | 33.33% |
| Joe Perches | 1 | 1.03% | 1 | 33.33% |
| Total | 97 | 100.00% | 3 | 100.00% |
/*
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 */
(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 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;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 1282 | 99.77% | 1 | 33.33% |
| Stephen Hemminger | 2 | 0.16% | 1 | 33.33% |
| Joe Perches | 1 | 0.08% | 1 | 33.33% |
| Total | 1285 | 100.00% | 3 | 100.00% |
#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 ;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 240 | 97.17% | 2 | 50.00% |
| Joe Perches | 6 | 2.43% | 1 | 25.00% |
| Stephen Hemminger | 1 | 0.40% | 1 | 25.00% |
| Total | 247 | 100.00% | 4 | 100.00% |
#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) ;
}
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 191 | 97.45% | 1 | 33.33% |
| Joe Perches | 4 | 2.04% | 1 | 33.33% |
| Stephen Hemminger | 1 | 0.51% | 1 | 33.33% |
| Total | 196 | 100.00% | 3 | 100.00% |
#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));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 35 | 92.11% | 1 | 50.00% |
| Stephen Hemminger | 3 | 7.89% | 1 | 50.00% |
| Total | 38 | 100.00% | 2 | 100.00% |
/*
* 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) ;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 32 | 96.97% | 1 | 50.00% |
| Stephen Hemminger | 1 | 3.03% | 1 | 50.00% |
| Total | 33 | 100.00% | 2 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 2109 | 97.32% | 2 | 40.00% |
| Stephen Hemminger | 44 | 2.03% | 1 | 20.00% |
| Joe Perches | 12 | 0.55% | 1 | 20.00% |
| Steven Cole | 2 | 0.09% | 1 | 20.00% |
| Total | 2167 | 100.00% | 5 | 100.00% |
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