1// SPDX-License-Identifier: GPL-2.0-or-later
2/******************************************************************************
3 *
4 *	(C)Copyright 1998,1999 SysKonnect,
5 *	a business unit of Schneider & Koch & Co. Datensysteme GmbH.
6 *
7 *	See the file "skfddi.c" for further information.
8 *
9 *	The information in this file is provided "AS IS" without warranty.
10 *
11 ******************************************************************************/
12
13/*
14	SMT Event Queue Management
15*/
16
17#include "h/types.h"
18#include "h/fddi.h"
19#include "h/smc.h"
20
21#define PRINTF(a,b,c)
22
23/*
24 * init event queue management
25 */
26void ev_init(struct s_smc *smc)
27{
28	smc->q.ev_put = smc->q.ev_get = smc->q.ev_queue ;
29}
30
31/*
32 * add event to queue
33 */
34void queue_event(struct s_smc *smc, int class, int event)
35{
36	PRINTF("queue class %d event %d\n",class,event) ;
37	smc->q.ev_put->class = class ;
38	smc->q.ev_put->event = event ;
39	if (++smc->q.ev_put == &smc->q.ev_queue[MAX_EVENT])
40		smc->q.ev_put = smc->q.ev_queue ;
41
42	if (smc->q.ev_put == smc->q.ev_get) {
43		SMT_ERR_LOG(smc,SMT_E0137, SMT_E0137_MSG) ;
44	}
45}
46
47/*
48 * timer_event is called from HW timer package.
49 */
50void timer_event(struct s_smc *smc, u_long token)
51{
52	PRINTF("timer event class %d token %d\n",
53		EV_T_CLASS(token),
54		EV_T_EVENT(token)) ;
55	queue_event(smc,EV_T_CLASS(token),EV_T_EVENT(token));
56}
57
58/*
59 * event dispatcher
60 *	while event queue is not empty
61 *		get event from queue
62 *		send command to state machine
63 *	end
64 */
65void ev_dispatcher(struct s_smc *smc)
66{
67	struct event_queue *ev ;	/* pointer into queue */
68	int		class ;
69
70	ev = smc->q.ev_get ;
71	PRINTF("dispatch get %x put %x\n",ev,smc->q.ev_put) ;
72	while (ev != smc->q.ev_put) {
73		PRINTF("dispatch class %d event %d\n",ev->class,ev->event) ;
74		switch(class = ev->class) {
75		case EVENT_ECM :		/* Entity Corordination  Man. */
76			ecm(smc,(int)ev->event) ;
77			break ;
78		case EVENT_CFM :		/* Configuration Man. */
79			cfm(smc,(int)ev->event) ;
80			break ;
81		case EVENT_RMT :		/* Ring Man. */
82			rmt(smc,(int)ev->event) ;
83			break ;
84		case EVENT_SMT :
85			smt_event(smc,(int)ev->event) ;
86			break ;
87#ifdef	CONCENTRATOR
88		case 99 :
89			timer_test_event(smc,(int)ev->event) ;
90			break ;
91#endif
92		case EVENT_PCMA :		/* PHY A */
93		case EVENT_PCMB :		/* PHY B */
94		default :
95			if (class >= EVENT_PCMA &&
96			    class < EVENT_PCMA + NUMPHYS) {
97				pcm(smc,class - EVENT_PCMA,(int)ev->event) ;
98				break ;
99			}
100			SMT_PANIC(smc,SMT_E0121, SMT_E0121_MSG) ;
101			return ;
102		}
103
104		if (++ev == &smc->q.ev_queue[MAX_EVENT])
105			ev = smc->q.ev_queue ;
106
107		/* Renew get: it is used in queue_events to detect overruns */
108		smc->q.ev_get = ev;
109	}
110}
111
112/*
113 * smt_online connects to or disconnects from the ring
114 * MUST be called to initiate connection establishment
115 *
116 *	on	0	disconnect
117 *	on	1	connect
118 */
119u_short smt_online(struct s_smc *smc, int on)
120{
121	queue_event(smc,EVENT_ECM,on ? EC_CONNECT : EC_DISCONNECT) ;
122	ev_dispatcher(smc) ;
123	return smc->mib.fddiSMTCF_State;
124}
125
126/*
127 * set SMT flag to value
128 *	flag		flag name
129 *	value		flag value
130 * dump current flag setting
131 */
132#ifdef	CONCENTRATOR
133void do_smt_flag(struct s_smc *smc, char *flag, int value)
134{
135#ifdef	DEBUG
136	struct smt_debug	*deb;
137
138	SK_UNUSED(smc) ;
139
140#ifdef	DEBUG_BRD
141	deb = &smc->debug;
142#else
143	deb = &debug;
144#endif
145	if (!strcmp(flag,"smt"))
146		deb->d_smt = value ;
147	else if (!strcmp(flag,"smtf"))
148		deb->d_smtf = value ;
149	else if (!strcmp(flag,"pcm"))
150		deb->d_pcm = value ;
151	else if (!strcmp(flag,"rmt"))
152		deb->d_rmt = value ;
153	else if (!strcmp(flag,"cfm"))
154		deb->d_cfm = value ;
155	else if (!strcmp(flag,"ecm"))
156		deb->d_ecm = value ;
157	printf("smt	%d\n",deb->d_smt) ;
158	printf("smtf	%d\n",deb->d_smtf) ;
159	printf("pcm	%d\n",deb->d_pcm) ;
160	printf("rmt	%d\n",deb->d_rmt) ;
161	printf("cfm	%d\n",deb->d_cfm) ;
162	printf("ecm	%d\n",deb->d_ecm) ;
163#endif	/* DEBUG */
164}
165#endif
166