1 /*********************************************************************
2 *
3 * Filename: timer.c
4 * Version:
5 * Description:
6 * Status: Experimental.
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Sat Aug 16 00:59:29 1997
9 * Modified at: Wed Dec 8 12:50:34 1999
10 * Modified by: Dag Brattli <dagb@cs.uit.no>
11 *
12 * Copyright (c) 1997, 1999 Dag Brattli <dagb@cs.uit.no>,
13 * All Rights Reserved.
14 * Copyright (c) 2000-2002 Jean Tourrilhes <jt@hpl.hp.com>
15 *
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License as
18 * published by the Free Software Foundation; either version 2 of
19 * the License, or (at your option) any later version.
20 *
21 * Neither Dag Brattli nor University of Tromsø admit liability nor
22 * provide warranty for any of this software. This material is
23 * provided "AS-IS" and at no charge.
24 *
25 ********************************************************************/
26
27 #include <linux/delay.h>
28
29 #include <net/irda/timer.h>
30 #include <net/irda/irda.h>
31 #include <net/irda/irda_device.h>
32 #include <net/irda/irlap.h>
33 #include <net/irda/irlmp.h>
34
35 extern int sysctl_slot_timeout;
36
37 static void irlap_slot_timer_expired(void* data);
38 static void irlap_query_timer_expired(void* data);
39 static void irlap_final_timer_expired(void* data);
40 static void irlap_wd_timer_expired(void* data);
41 static void irlap_backoff_timer_expired(void* data);
42 static void irlap_media_busy_expired(void* data);
43
44 void irlap_start_slot_timer(struct irlap_cb *self, int timeout)
45 {
46 irda_start_timer(&self->slot_timer, timeout, (void *) self,
47 irlap_slot_timer_expired);
48 }
49
50 void irlap_start_query_timer(struct irlap_cb *self, int S, int s)
51 {
52 int timeout;
53
54 /* Calculate when the peer discovery should end. Normally, we
55 * get the end-of-discovery frame, so this is just in case
56 * we miss it.
57 * Basically, we multiply the number of remaining slots by our
58 * slot time, plus add some extra time to properly receive the last
59 * discovery packet (which is longer due to extra discovery info),
60 * to avoid messing with for incoming connections requests and
61 * to accommodate devices that perform discovery slower than us.
62 * Jean II */
63 timeout = msecs_to_jiffies(sysctl_slot_timeout) * (S - s)
64 + XIDEXTRA_TIMEOUT + SMALLBUSY_TIMEOUT;
65
66 /* Set or re-set the timer. We reset the timer for each received
67 * discovery query, which allow us to automatically adjust to
68 * the speed of the peer discovery (faster or slower). Jean II */
69 irda_start_timer( &self->query_timer, timeout, (void *) self,
70 irlap_query_timer_expired);
71 }
72
73 void irlap_start_final_timer(struct irlap_cb *self, int timeout)
74 {
75 irda_start_timer(&self->final_timer, timeout, (void *) self,
76 irlap_final_timer_expired);
77 }
78
79 void irlap_start_wd_timer(struct irlap_cb *self, int timeout)
80 {
81 irda_start_timer(&self->wd_timer, timeout, (void *) self,
82 irlap_wd_timer_expired);
83 }
84
85 void irlap_start_backoff_timer(struct irlap_cb *self, int timeout)
86 {
87 irda_start_timer(&self->backoff_timer, timeout, (void *) self,
88 irlap_backoff_timer_expired);
89 }
90
91 void irlap_start_mbusy_timer(struct irlap_cb *self, int timeout)
92 {
93 irda_start_timer(&self->media_busy_timer, timeout,
94 (void *) self, irlap_media_busy_expired);
95 }
96
97 void irlap_stop_mbusy_timer(struct irlap_cb *self)
98 {
99 /* If timer is activated, kill it! */
100 del_timer(&self->media_busy_timer);
101
102 /* If we are in NDM, there is a bunch of events in LAP that
103 * that be pending due to the media_busy condition, such as
104 * CONNECT_REQUEST and SEND_UI_FRAME. If we don't generate
105 * an event, they will wait forever...
106 * Jean II */
107 if (self->state == LAP_NDM)
108 irlap_do_event(self, MEDIA_BUSY_TIMER_EXPIRED, NULL, NULL);
109 }
110
111 void irlmp_start_watchdog_timer(struct lsap_cb *self, int timeout)
112 {
113 irda_start_timer(&self->watchdog_timer, timeout, (void *) self,
114 irlmp_watchdog_timer_expired);
115 }
116
117 void irlmp_start_discovery_timer(struct irlmp_cb *self, int timeout)
118 {
119 irda_start_timer(&self->discovery_timer, timeout, (void *) self,
120 irlmp_discovery_timer_expired);
121 }
122
123 void irlmp_start_idle_timer(struct lap_cb *self, int timeout)
124 {
125 irda_start_timer(&self->idle_timer, timeout, (void *) self,
126 irlmp_idle_timer_expired);
127 }
128
129 void irlmp_stop_idle_timer(struct lap_cb *self)
130 {
131 /* If timer is activated, kill it! */
132 del_timer(&self->idle_timer);
133 }
134
135 /*
136 * Function irlap_slot_timer_expired (data)
137 *
138 * IrLAP slot timer has expired
139 *
140 */
141 static void irlap_slot_timer_expired(void *data)
142 {
143 struct irlap_cb *self = (struct irlap_cb *) data;
144
145 IRDA_ASSERT(self != NULL, return;);
146 IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
147
148 irlap_do_event(self, SLOT_TIMER_EXPIRED, NULL, NULL);
149 }
150
151 /*
152 * Function irlap_query_timer_expired (data)
153 *
154 * IrLAP query timer has expired
155 *
156 */
157 static void irlap_query_timer_expired(void *data)
158 {
159 struct irlap_cb *self = (struct irlap_cb *) data;
160
161 IRDA_ASSERT(self != NULL, return;);
162 IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
163
164 irlap_do_event(self, QUERY_TIMER_EXPIRED, NULL, NULL);
165 }
166
167 /*
168 * Function irda_final_timer_expired (data)
169 *
170 *
171 *
172 */
173 static void irlap_final_timer_expired(void *data)
174 {
175 struct irlap_cb *self = (struct irlap_cb *) data;
176
177 IRDA_ASSERT(self != NULL, return;);
178 IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
179
180 irlap_do_event(self, FINAL_TIMER_EXPIRED, NULL, NULL);
181 }
182
183 /*
184 * Function irda_wd_timer_expired (data)
185 *
186 *
187 *
188 */
189 static void irlap_wd_timer_expired(void *data)
190 {
191 struct irlap_cb *self = (struct irlap_cb *) data;
192
193 IRDA_ASSERT(self != NULL, return;);
194 IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
195
196 irlap_do_event(self, WD_TIMER_EXPIRED, NULL, NULL);
197 }
198
199 /*
200 * Function irda_backoff_timer_expired (data)
201 *
202 *
203 *
204 */
205 static void irlap_backoff_timer_expired(void *data)
206 {
207 struct irlap_cb *self = (struct irlap_cb *) data;
208
209 IRDA_ASSERT(self != NULL, return;);
210 IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
211
212 irlap_do_event(self, BACKOFF_TIMER_EXPIRED, NULL, NULL);
213 }
214
215
216 /*
217 * Function irtty_media_busy_expired (data)
218 *
219 *
220 */
221 static void irlap_media_busy_expired(void *data)
222 {
223 struct irlap_cb *self = (struct irlap_cb *) data;
224
225 IRDA_ASSERT(self != NULL, return;);
226
227 irda_device_set_media_busy(self->netdev, FALSE);
228 /* Note : the LAP event will be send in irlap_stop_mbusy_timer(),
229 * to catch other cases where the flag is cleared (for example
230 * after a discovery) - Jean II */
231 }
232
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