Loading...
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * finite state machine implementation
4 *
5 * Author Karsten Keil <kkeil@novell.com>
6 *
7 * Thanks to Jan den Ouden
8 * Fritz Elfert
9 * Copyright 2008 by Karsten Keil <kkeil@novell.com>
10 */
11
12#include <linux/kernel.h>
13#include <linux/slab.h>
14#include <linux/module.h>
15#include <linux/string.h>
16#include "fsm.h"
17
18#define FSM_TIMER_DEBUG 0
19
20int
21mISDN_FsmNew(struct Fsm *fsm,
22 struct FsmNode *fnlist, int fncount)
23{
24 int i;
25
26 fsm->jumpmatrix =
27 kzalloc(array3_size(sizeof(FSMFNPTR), fsm->state_count,
28 fsm->event_count),
29 GFP_KERNEL);
30 if (fsm->jumpmatrix == NULL)
31 return -ENOMEM;
32
33 for (i = 0; i < fncount; i++)
34 if ((fnlist[i].state >= fsm->state_count) ||
35 (fnlist[i].event >= fsm->event_count)) {
36 printk(KERN_ERR
37 "mISDN_FsmNew Error: %d st(%ld/%ld) ev(%ld/%ld)\n",
38 i, (long)fnlist[i].state, (long)fsm->state_count,
39 (long)fnlist[i].event, (long)fsm->event_count);
40 } else
41 fsm->jumpmatrix[fsm->state_count * fnlist[i].event +
42 fnlist[i].state] = (FSMFNPTR) fnlist[i].routine;
43 return 0;
44}
45EXPORT_SYMBOL(mISDN_FsmNew);
46
47void
48mISDN_FsmFree(struct Fsm *fsm)
49{
50 kfree((void *) fsm->jumpmatrix);
51}
52EXPORT_SYMBOL(mISDN_FsmFree);
53
54int
55mISDN_FsmEvent(struct FsmInst *fi, int event, void *arg)
56{
57 FSMFNPTR r;
58
59 if ((fi->state >= fi->fsm->state_count) ||
60 (event >= fi->fsm->event_count)) {
61 printk(KERN_ERR
62 "mISDN_FsmEvent Error st(%ld/%ld) ev(%d/%ld)\n",
63 (long)fi->state, (long)fi->fsm->state_count, event,
64 (long)fi->fsm->event_count);
65 return 1;
66 }
67 r = fi->fsm->jumpmatrix[fi->fsm->state_count * event + fi->state];
68 if (r) {
69 if (fi->debug)
70 fi->printdebug(fi, "State %s Event %s",
71 fi->fsm->strState[fi->state],
72 fi->fsm->strEvent[event]);
73 r(fi, event, arg);
74 return 0;
75 } else {
76 if (fi->debug)
77 fi->printdebug(fi, "State %s Event %s no action",
78 fi->fsm->strState[fi->state],
79 fi->fsm->strEvent[event]);
80 return 1;
81 }
82}
83EXPORT_SYMBOL(mISDN_FsmEvent);
84
85void
86mISDN_FsmChangeState(struct FsmInst *fi, int newstate)
87{
88 fi->state = newstate;
89 if (fi->debug)
90 fi->printdebug(fi, "ChangeState %s",
91 fi->fsm->strState[newstate]);
92}
93EXPORT_SYMBOL(mISDN_FsmChangeState);
94
95static void
96FsmExpireTimer(struct timer_list *t)
97{
98 struct FsmTimer *ft = from_timer(ft, t, tl);
99#if FSM_TIMER_DEBUG
100 if (ft->fi->debug)
101 ft->fi->printdebug(ft->fi, "FsmExpireTimer %lx", (long) ft);
102#endif
103 mISDN_FsmEvent(ft->fi, ft->event, ft->arg);
104}
105
106void
107mISDN_FsmInitTimer(struct FsmInst *fi, struct FsmTimer *ft)
108{
109 ft->fi = fi;
110#if FSM_TIMER_DEBUG
111 if (ft->fi->debug)
112 ft->fi->printdebug(ft->fi, "mISDN_FsmInitTimer %lx", (long) ft);
113#endif
114 timer_setup(&ft->tl, FsmExpireTimer, 0);
115}
116EXPORT_SYMBOL(mISDN_FsmInitTimer);
117
118void
119mISDN_FsmDelTimer(struct FsmTimer *ft, int where)
120{
121#if FSM_TIMER_DEBUG
122 if (ft->fi->debug)
123 ft->fi->printdebug(ft->fi, "mISDN_FsmDelTimer %lx %d",
124 (long) ft, where);
125#endif
126 del_timer(&ft->tl);
127}
128EXPORT_SYMBOL(mISDN_FsmDelTimer);
129
130int
131mISDN_FsmAddTimer(struct FsmTimer *ft,
132 int millisec, int event, void *arg, int where)
133{
134
135#if FSM_TIMER_DEBUG
136 if (ft->fi->debug)
137 ft->fi->printdebug(ft->fi, "mISDN_FsmAddTimer %lx %d %d",
138 (long) ft, millisec, where);
139#endif
140
141 if (timer_pending(&ft->tl)) {
142 if (ft->fi->debug) {
143 printk(KERN_WARNING
144 "mISDN_FsmAddTimer: timer already active!\n");
145 ft->fi->printdebug(ft->fi,
146 "mISDN_FsmAddTimer already active!");
147 }
148 return -1;
149 }
150 ft->event = event;
151 ft->arg = arg;
152 ft->tl.expires = jiffies + (millisec * HZ) / 1000;
153 add_timer(&ft->tl);
154 return 0;
155}
156EXPORT_SYMBOL(mISDN_FsmAddTimer);
157
158void
159mISDN_FsmRestartTimer(struct FsmTimer *ft,
160 int millisec, int event, void *arg, int where)
161{
162
163#if FSM_TIMER_DEBUG
164 if (ft->fi->debug)
165 ft->fi->printdebug(ft->fi, "mISDN_FsmRestartTimer %lx %d %d",
166 (long) ft, millisec, where);
167#endif
168
169 if (timer_pending(&ft->tl))
170 del_timer(&ft->tl);
171 ft->event = event;
172 ft->arg = arg;
173 ft->tl.expires = jiffies + (millisec * HZ) / 1000;
174 add_timer(&ft->tl);
175}
176EXPORT_SYMBOL(mISDN_FsmRestartTimer);
1/*
2 * finite state machine implementation
3 *
4 * Author Karsten Keil <kkeil@novell.com>
5 *
6 * Thanks to Jan den Ouden
7 * Fritz Elfert
8 * Copyright 2008 by Karsten Keil <kkeil@novell.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 */
20
21#include <linux/kernel.h>
22#include <linux/slab.h>
23#include <linux/module.h>
24#include <linux/string.h>
25#include "fsm.h"
26
27#define FSM_TIMER_DEBUG 0
28
29void
30mISDN_FsmNew(struct Fsm *fsm,
31 struct FsmNode *fnlist, int fncount)
32{
33 int i;
34
35 fsm->jumpmatrix = kzalloc(sizeof(FSMFNPTR) * fsm->state_count *
36 fsm->event_count, GFP_KERNEL);
37
38 for (i = 0; i < fncount; i++)
39 if ((fnlist[i].state >= fsm->state_count) ||
40 (fnlist[i].event >= fsm->event_count)) {
41 printk(KERN_ERR
42 "mISDN_FsmNew Error: %d st(%ld/%ld) ev(%ld/%ld)\n",
43 i, (long)fnlist[i].state, (long)fsm->state_count,
44 (long)fnlist[i].event, (long)fsm->event_count);
45 } else
46 fsm->jumpmatrix[fsm->state_count * fnlist[i].event +
47 fnlist[i].state] = (FSMFNPTR) fnlist[i].routine;
48}
49EXPORT_SYMBOL(mISDN_FsmNew);
50
51void
52mISDN_FsmFree(struct Fsm *fsm)
53{
54 kfree((void *) fsm->jumpmatrix);
55}
56EXPORT_SYMBOL(mISDN_FsmFree);
57
58int
59mISDN_FsmEvent(struct FsmInst *fi, int event, void *arg)
60{
61 FSMFNPTR r;
62
63 if ((fi->state >= fi->fsm->state_count) ||
64 (event >= fi->fsm->event_count)) {
65 printk(KERN_ERR
66 "mISDN_FsmEvent Error st(%ld/%ld) ev(%d/%ld)\n",
67 (long)fi->state, (long)fi->fsm->state_count, event,
68 (long)fi->fsm->event_count);
69 return 1;
70 }
71 r = fi->fsm->jumpmatrix[fi->fsm->state_count * event + fi->state];
72 if (r) {
73 if (fi->debug)
74 fi->printdebug(fi, "State %s Event %s",
75 fi->fsm->strState[fi->state],
76 fi->fsm->strEvent[event]);
77 r(fi, event, arg);
78 return 0;
79 } else {
80 if (fi->debug)
81 fi->printdebug(fi, "State %s Event %s no action",
82 fi->fsm->strState[fi->state],
83 fi->fsm->strEvent[event]);
84 return 1;
85 }
86}
87EXPORT_SYMBOL(mISDN_FsmEvent);
88
89void
90mISDN_FsmChangeState(struct FsmInst *fi, int newstate)
91{
92 fi->state = newstate;
93 if (fi->debug)
94 fi->printdebug(fi, "ChangeState %s",
95 fi->fsm->strState[newstate]);
96}
97EXPORT_SYMBOL(mISDN_FsmChangeState);
98
99static void
100FsmExpireTimer(struct FsmTimer *ft)
101{
102#if FSM_TIMER_DEBUG
103 if (ft->fi->debug)
104 ft->fi->printdebug(ft->fi, "FsmExpireTimer %lx", (long) ft);
105#endif
106 mISDN_FsmEvent(ft->fi, ft->event, ft->arg);
107}
108
109void
110mISDN_FsmInitTimer(struct FsmInst *fi, struct FsmTimer *ft)
111{
112 ft->fi = fi;
113 ft->tl.function = (void *) FsmExpireTimer;
114 ft->tl.data = (long) ft;
115#if FSM_TIMER_DEBUG
116 if (ft->fi->debug)
117 ft->fi->printdebug(ft->fi, "mISDN_FsmInitTimer %lx", (long) ft);
118#endif
119 init_timer(&ft->tl);
120}
121EXPORT_SYMBOL(mISDN_FsmInitTimer);
122
123void
124mISDN_FsmDelTimer(struct FsmTimer *ft, int where)
125{
126#if FSM_TIMER_DEBUG
127 if (ft->fi->debug)
128 ft->fi->printdebug(ft->fi, "mISDN_FsmDelTimer %lx %d",
129 (long) ft, where);
130#endif
131 del_timer(&ft->tl);
132}
133EXPORT_SYMBOL(mISDN_FsmDelTimer);
134
135int
136mISDN_FsmAddTimer(struct FsmTimer *ft,
137 int millisec, int event, void *arg, int where)
138{
139
140#if FSM_TIMER_DEBUG
141 if (ft->fi->debug)
142 ft->fi->printdebug(ft->fi, "mISDN_FsmAddTimer %lx %d %d",
143 (long) ft, millisec, where);
144#endif
145
146 if (timer_pending(&ft->tl)) {
147 if (ft->fi->debug) {
148 printk(KERN_WARNING
149 "mISDN_FsmAddTimer: timer already active!\n");
150 ft->fi->printdebug(ft->fi,
151 "mISDN_FsmAddTimer already active!");
152 }
153 return -1;
154 }
155 init_timer(&ft->tl);
156 ft->event = event;
157 ft->arg = arg;
158 ft->tl.expires = jiffies + (millisec * HZ) / 1000;
159 add_timer(&ft->tl);
160 return 0;
161}
162EXPORT_SYMBOL(mISDN_FsmAddTimer);
163
164void
165mISDN_FsmRestartTimer(struct FsmTimer *ft,
166 int millisec, int event, void *arg, int where)
167{
168
169#if FSM_TIMER_DEBUG
170 if (ft->fi->debug)
171 ft->fi->printdebug(ft->fi, "mISDN_FsmRestartTimer %lx %d %d",
172 (long) ft, millisec, where);
173#endif
174
175 if (timer_pending(&ft->tl))
176 del_timer(&ft->tl);
177 init_timer(&ft->tl);
178 ft->event = event;
179 ft->arg = arg;
180 ft->tl.expires = jiffies + (millisec * HZ) / 1000;
181 add_timer(&ft->tl);
182}
183EXPORT_SYMBOL(mISDN_FsmRestartTimer);