1 files changed, 220 insertions, 0 deletions

diff --git a/drivers/s390/net/fsm.c b/drivers/s390/net/fsm.c
new file mode 100644
index 000000000000..fa09440d82e5
--- /dev/null
+++ b/drivers/s390/net/fsm.c
@@ -0,0 +1,220 @@
+/**
+ * $Id: fsm.c,v 1.6 2003/10/15 11:37:29 mschwide Exp $
+ *
+ * A generic FSM based on fsm used in isdn4linux
+ *
+ */
+
+#include "fsm.h"
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/timer.h>
+
+MODULE_AUTHOR("(C) 2000 IBM Corp. by Fritz Elfert (felfert@millenux.com)");
+MODULE_DESCRIPTION("Finite state machine helper functions");
+MODULE_LICENSE("GPL");
+
+fsm_instance *
+init_fsm(char *name, const char **state_names, const char **event_names, int nr_states,
+                int nr_events, const fsm_node *tmpl, int tmpl_len, int order)
+{
+        int i;
+        fsm_instance *this;
+        fsm_function_t *m;
+        fsm *f;
+
+        this = (fsm_instance *)kmalloc(sizeof(fsm_instance), order);
+        if (this == NULL) {
+                printk(KERN_WARNING
+                        "fsm(%s): init_fsm: Couldn't alloc instance\n", name);
+                return NULL;
+        }
+        memset(this, 0, sizeof(fsm_instance));
+        strlcpy(this->name, name, sizeof(this->name));
+
+        f = (fsm *)kmalloc(sizeof(fsm), order);
+        if (f == NULL) {
+                printk(KERN_WARNING
+                        "fsm(%s): init_fsm: Couldn't alloc fsm\n", name);
+                kfree_fsm(this);
+                return NULL;
+        }
+        memset(f, 0, sizeof(fsm));
+        f->nr_events = nr_events;
+        f->nr_states = nr_states;
+        f->event_names = event_names;
+        f->state_names = state_names;
+        this->f = f;
+
+        m = (fsm_function_t *)kmalloc(
+                        sizeof(fsm_function_t) * nr_states * nr_events, order);
+        if (m == NULL) {
+                printk(KERN_WARNING
+                        "fsm(%s): init_fsm: Couldn't alloc jumptable\n", name);
+                kfree_fsm(this);
+                return NULL;
+        }
+        memset(m, 0, sizeof(fsm_function_t) * f->nr_states * f->nr_events);
+        f->jumpmatrix = m;
+
+        for (i = 0; i < tmpl_len; i++) {
+                if ((tmpl[i].cond_state >= nr_states) ||
+                    (tmpl[i].cond_event >= nr_events)   ) {
+                        printk(KERN_ERR
+                                "fsm(%s): init_fsm: Bad template l=%d st(%ld/%ld) ev(%ld/%ld)\n",
+                                name, i, (long)tmpl[i].cond_state, (long)f->nr_states,
+                                (long)tmpl[i].cond_event, (long)f->nr_events);
+                        kfree_fsm(this);
+                        return NULL;
+                } else
+                        m[nr_states * tmpl[i].cond_event + tmpl[i].cond_state] =
+                                tmpl[i].function;
+        }
+        return this;
+}
+
+void
+kfree_fsm(fsm_instance *this)
+{
+        if (this) {
+                if (this->f) {
+                        if (this->f->jumpmatrix)
+                                kfree(this->f->jumpmatrix);
+                        kfree(this->f);
+                }
+                kfree(this);
+        } else
+                printk(KERN_WARNING
+                        "fsm: kfree_fsm called with NULL argument\n");
+}
+
+#if FSM_DEBUG_HISTORY
+void
+fsm_print_history(fsm_instance *fi)
+{
+        int idx = 0;
+        int i;
+
+        if (fi->history_size >= FSM_HISTORY_SIZE)
+                idx = fi->history_index;
+
+        printk(KERN_DEBUG "fsm(%s): History:\n", fi->name);
+        for (i = 0; i < fi->history_size; i++) {
+                int e = fi->history[idx].event;
+                int s = fi->history[idx++].state;
+                idx %= FSM_HISTORY_SIZE;
+                if (e == -1)
+                        printk(KERN_DEBUG "  S=%s\n",
+                               fi->f->state_names[s]);
+                else
+                        printk(KERN_DEBUG "  S=%s E=%s\n",
+                               fi->f->state_names[s],
+                               fi->f->event_names[e]);
+        }
+        fi->history_size = fi->history_index = 0;
+}
+
+void
+fsm_record_history(fsm_instance *fi, int state, int event)
+{
+        fi->history[fi->history_index].state = state;
+        fi->history[fi->history_index++].event = event;
+        fi->history_index %= FSM_HISTORY_SIZE;
+        if (fi->history_size < FSM_HISTORY_SIZE)
+                fi->history_size++;
+}
+#endif
+
+const char *
+fsm_getstate_str(fsm_instance *fi)
+{
+        int st = atomic_read(&fi->state);
+        if (st >= fi->f->nr_states)
+                return "Invalid";
+        return fi->f->state_names[st];
+}
+
+static void
+fsm_expire_timer(fsm_timer *this)
+{
+#if FSM_TIMER_DEBUG
+        printk(KERN_DEBUG "fsm(%s): Timer %p expired\n",
+               this->fi->name, this);
+#endif
+        fsm_event(this->fi, this->expire_event, this->event_arg);
+}
+
+void
+fsm_settimer(fsm_instance *fi, fsm_timer *this)
+{
+        this->fi = fi;
+        this->tl.function = (void *)fsm_expire_timer;
+        this->tl.data = (long)this;
+#if FSM_TIMER_DEBUG
+        printk(KERN_DEBUG "fsm(%s): Create timer %p\n", fi->name,
+               this);
+#endif
+        init_timer(&this->tl);
+}
+
+void
+fsm_deltimer(fsm_timer *this)
+{
+#if FSM_TIMER_DEBUG
+        printk(KERN_DEBUG "fsm(%s): Delete timer %p\n", this->fi->name,
+                this);
+#endif
+        del_timer(&this->tl);
+}
+
+int
+fsm_addtimer(fsm_timer *this, int millisec, int event, void *arg)
+{
+
+#if FSM_TIMER_DEBUG
+        printk(KERN_DEBUG "fsm(%s): Add timer %p %dms\n",
+               this->fi->name, this, millisec);
+#endif
+
+        init_timer(&this->tl);
+        this->tl.function = (void *)fsm_expire_timer;
+        this->tl.data = (long)this;
+        this->expire_event = event;
+        this->event_arg = arg;
+        this->tl.expires = jiffies + (millisec * HZ) / 1000;
+        add_timer(&this->tl);
+        return 0;
+}
+
+/* FIXME: this function is never used, why */
+void
+fsm_modtimer(fsm_timer *this, int millisec, int event, void *arg)
+{
+
+#if FSM_TIMER_DEBUG
+        printk(KERN_DEBUG "fsm(%s): Restart timer %p %dms\n",
+                this->fi->name, this, millisec);
+#endif
+
+        del_timer(&this->tl);
+        init_timer(&this->tl);
+        this->tl.function = (void *)fsm_expire_timer;
+        this->tl.data = (long)this;
+        this->expire_event = event;
+        this->event_arg = arg;
+        this->tl.expires = jiffies + (millisec * HZ) / 1000;
+        add_timer(&this->tl);
+}
+
+EXPORT_SYMBOL(init_fsm);
+EXPORT_SYMBOL(kfree_fsm);
+EXPORT_SYMBOL(fsm_settimer);
+EXPORT_SYMBOL(fsm_deltimer);
+EXPORT_SYMBOL(fsm_addtimer);
+EXPORT_SYMBOL(fsm_modtimer);
+EXPORT_SYMBOL(fsm_getstate_str);
+
+#if FSM_DEBUG_HISTORY
+EXPORT_SYMBOL(fsm_print_history);
+EXPORT_SYMBOL(fsm_record_history);
+#endif