summaryrefslogtreecommitdiffstats
path: root/drivers/net/skfp/queue.c
blob: c1a0df455a5958089bc4bae4c6dcfe8b9539042b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
/******************************************************************************
 *
 *	(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 ;
}

/*
 * 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) ;
	}
}

/*
 * 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));
}

/*
 * 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;
	}
}

/*
 * 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;
}

/*
 * 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 */
}
#endif