linux-stable/drivers/isdn/mISDN/fsm.c
Thomas Gleixner 1802d0beec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation this program is
  distributed in the hope that it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 655 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:41 -07:00

176 lines
4 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* finite state machine implementation
*
* Author Karsten Keil <kkeil@novell.com>
*
* Thanks to Jan den Ouden
* Fritz Elfert
* Copyright 2008 by Karsten Keil <kkeil@novell.com>
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/string.h>
#include "fsm.h"
#define FSM_TIMER_DEBUG 0
int
mISDN_FsmNew(struct Fsm *fsm,
struct FsmNode *fnlist, int fncount)
{
int i;
fsm->jumpmatrix =
kzalloc(array3_size(sizeof(FSMFNPTR), fsm->state_count,
fsm->event_count),
GFP_KERNEL);
if (fsm->jumpmatrix == NULL)
return -ENOMEM;
for (i = 0; i < fncount; i++)
if ((fnlist[i].state >= fsm->state_count) ||
(fnlist[i].event >= fsm->event_count)) {
printk(KERN_ERR
"mISDN_FsmNew Error: %d st(%ld/%ld) ev(%ld/%ld)\n",
i, (long)fnlist[i].state, (long)fsm->state_count,
(long)fnlist[i].event, (long)fsm->event_count);
} else
fsm->jumpmatrix[fsm->state_count * fnlist[i].event +
fnlist[i].state] = (FSMFNPTR) fnlist[i].routine;
return 0;
}
EXPORT_SYMBOL(mISDN_FsmNew);
void
mISDN_FsmFree(struct Fsm *fsm)
{
kfree((void *) fsm->jumpmatrix);
}
EXPORT_SYMBOL(mISDN_FsmFree);
int
mISDN_FsmEvent(struct FsmInst *fi, int event, void *arg)
{
FSMFNPTR r;
if ((fi->state >= fi->fsm->state_count) ||
(event >= fi->fsm->event_count)) {
printk(KERN_ERR
"mISDN_FsmEvent Error st(%ld/%ld) ev(%d/%ld)\n",
(long)fi->state, (long)fi->fsm->state_count, event,
(long)fi->fsm->event_count);
return 1;
}
r = fi->fsm->jumpmatrix[fi->fsm->state_count * event + fi->state];
if (r) {
if (fi->debug)
fi->printdebug(fi, "State %s Event %s",
fi->fsm->strState[fi->state],
fi->fsm->strEvent[event]);
r(fi, event, arg);
return 0;
} else {
if (fi->debug)
fi->printdebug(fi, "State %s Event %s no action",
fi->fsm->strState[fi->state],
fi->fsm->strEvent[event]);
return 1;
}
}
EXPORT_SYMBOL(mISDN_FsmEvent);
void
mISDN_FsmChangeState(struct FsmInst *fi, int newstate)
{
fi->state = newstate;
if (fi->debug)
fi->printdebug(fi, "ChangeState %s",
fi->fsm->strState[newstate]);
}
EXPORT_SYMBOL(mISDN_FsmChangeState);
static void
FsmExpireTimer(struct timer_list *t)
{
struct FsmTimer *ft = from_timer(ft, t, tl);
#if FSM_TIMER_DEBUG
if (ft->fi->debug)
ft->fi->printdebug(ft->fi, "FsmExpireTimer %lx", (long) ft);
#endif
mISDN_FsmEvent(ft->fi, ft->event, ft->arg);
}
void
mISDN_FsmInitTimer(struct FsmInst *fi, struct FsmTimer *ft)
{
ft->fi = fi;
#if FSM_TIMER_DEBUG
if (ft->fi->debug)
ft->fi->printdebug(ft->fi, "mISDN_FsmInitTimer %lx", (long) ft);
#endif
timer_setup(&ft->tl, FsmExpireTimer, 0);
}
EXPORT_SYMBOL(mISDN_FsmInitTimer);
void
mISDN_FsmDelTimer(struct FsmTimer *ft, int where)
{
#if FSM_TIMER_DEBUG
if (ft->fi->debug)
ft->fi->printdebug(ft->fi, "mISDN_FsmDelTimer %lx %d",
(long) ft, where);
#endif
del_timer(&ft->tl);
}
EXPORT_SYMBOL(mISDN_FsmDelTimer);
int
mISDN_FsmAddTimer(struct FsmTimer *ft,
int millisec, int event, void *arg, int where)
{
#if FSM_TIMER_DEBUG
if (ft->fi->debug)
ft->fi->printdebug(ft->fi, "mISDN_FsmAddTimer %lx %d %d",
(long) ft, millisec, where);
#endif
if (timer_pending(&ft->tl)) {
if (ft->fi->debug) {
printk(KERN_WARNING
"mISDN_FsmAddTimer: timer already active!\n");
ft->fi->printdebug(ft->fi,
"mISDN_FsmAddTimer already active!");
}
return -1;
}
ft->event = event;
ft->arg = arg;
ft->tl.expires = jiffies + (millisec * HZ) / 1000;
add_timer(&ft->tl);
return 0;
}
EXPORT_SYMBOL(mISDN_FsmAddTimer);
void
mISDN_FsmRestartTimer(struct FsmTimer *ft,
int millisec, int event, void *arg, int where)
{
#if FSM_TIMER_DEBUG
if (ft->fi->debug)
ft->fi->printdebug(ft->fi, "mISDN_FsmRestartTimer %lx %d %d",
(long) ft, millisec, where);
#endif
if (timer_pending(&ft->tl))
del_timer(&ft->tl);
ft->event = event;
ft->arg = arg;
ft->tl.expires = jiffies + (millisec * HZ) / 1000;
add_timer(&ft->tl);
}
EXPORT_SYMBOL(mISDN_FsmRestartTimer);