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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 <asm/system.h> |
28 | #include <linux/delay.h> |
29 | |
30 | #include <net/irda/timer.h> |
31 | #include <net/irda/irda.h> |
32 | #include <net/irda/irda_device.h> |
33 | #include <net/irda/irlap.h> |
34 | #include <net/irda/irlmp.h> |
35 | |
36 | extern int sysctl_slot_timeout; |
37 | |
38 | static void irlap_slot_timer_expired(void* data); |
39 | static void irlap_query_timer_expired(void* data); |
40 | static void irlap_final_timer_expired(void* data); |
41 | static void irlap_wd_timer_expired(void* data); |
42 | static void irlap_backoff_timer_expired(void* data); |
43 | static void irlap_media_busy_expired(void* data); |
44 | |
45 | void irlap_start_slot_timer(struct irlap_cb *self, int timeout) |
46 | { |
47 | irda_start_timer(&self->slot_timer, timeout, (void *) self, |
48 | irlap_slot_timer_expired); |
49 | } |
50 | |
51 | void irlap_start_query_timer(struct irlap_cb *self, int S, int s) |
52 | { |
53 | int timeout; |
54 | |
55 | /* Calculate when the peer discovery should end. Normally, we |
56 | * get the end-of-discovery frame, so this is just in case |
57 | * we miss it. |
58 | * Basically, we multiply the number of remaining slots by our |
59 | * slot time, plus add some extra time to properly receive the last |
60 | * discovery packet (which is longer due to extra discovery info), |
61 | * to avoid messing with for incomming connections requests and |
62 | * to accomodate devices that perform discovery slower than us. |
63 | * Jean II */ |
64 | timeout = ((sysctl_slot_timeout * HZ / 1000) * (S - s) |
65 | + XIDEXTRA_TIMEOUT + SMALLBUSY_TIMEOUT); |
66 | |
67 | /* Set or re-set the timer. We reset the timer for each received |
68 | * discovery query, which allow us to automatically adjust to |
69 | * the speed of the peer discovery (faster or slower). Jean II */ |
70 | irda_start_timer( &self->query_timer, timeout, (void *) self, |
71 | irlap_query_timer_expired); |
72 | } |
73 | |
74 | void irlap_start_final_timer(struct irlap_cb *self, int timeout) |
75 | { |
76 | irda_start_timer(&self->final_timer, timeout, (void *) self, |
77 | irlap_final_timer_expired); |
78 | } |
79 | |
80 | void irlap_start_wd_timer(struct irlap_cb *self, int timeout) |
81 | { |
82 | irda_start_timer(&self->wd_timer, timeout, (void *) self, |
83 | irlap_wd_timer_expired); |
84 | } |
85 | |
86 | void irlap_start_backoff_timer(struct irlap_cb *self, int timeout) |
87 | { |
88 | irda_start_timer(&self->backoff_timer, timeout, (void *) self, |
89 | irlap_backoff_timer_expired); |
90 | } |
91 | |
92 | void irlap_start_mbusy_timer(struct irlap_cb *self, int timeout) |
93 | { |
94 | irda_start_timer(&self->media_busy_timer, timeout, |
95 | (void *) self, irlap_media_busy_expired); |
96 | } |
97 | |
98 | void irlap_stop_mbusy_timer(struct irlap_cb *self) |
99 | { |
100 | /* If timer is activated, kill it! */ |
101 | del_timer(&self->media_busy_timer); |
102 | |
103 | /* If we are in NDM, there is a bunch of events in LAP that |
104 | * that be pending due to the media_busy condition, such as |
105 | * CONNECT_REQUEST and SEND_UI_FRAME. If we don't generate |
106 | * an event, they will wait forever... |
107 | * Jean II */ |
108 | if (self->state == LAP_NDM) |
109 | irlap_do_event(self, MEDIA_BUSY_TIMER_EXPIRED, NULL, NULL); |
110 | } |
111 | |
112 | void irlmp_start_watchdog_timer(struct lsap_cb *self, int timeout) |
113 | { |
114 | irda_start_timer(&self->watchdog_timer, timeout, (void *) self, |
115 | irlmp_watchdog_timer_expired); |
116 | } |
117 | |
118 | void irlmp_start_discovery_timer(struct irlmp_cb *self, int timeout) |
119 | { |
120 | irda_start_timer(&self->discovery_timer, timeout, (void *) self, |
121 | irlmp_discovery_timer_expired); |
122 | } |
123 | |
124 | void irlmp_start_idle_timer(struct lap_cb *self, int timeout) |
125 | { |
126 | irda_start_timer(&self->idle_timer, timeout, (void *) self, |
127 | irlmp_idle_timer_expired); |
128 | } |
129 | |
130 | void irlmp_stop_idle_timer(struct lap_cb *self) |
131 | { |
132 | /* If timer is activated, kill it! */ |
133 | del_timer(&self->idle_timer); |
134 | } |
135 | |
136 | /* |
137 | * Function irlap_slot_timer_expired (data) |
138 | * |
139 | * IrLAP slot timer has expired |
140 | * |
141 | */ |
142 | static void irlap_slot_timer_expired(void *data) |
143 | { |
144 | struct irlap_cb *self = (struct irlap_cb *) data; |
145 | |
146 | IRDA_ASSERT(self != NULL, return;); |
147 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
148 | |
149 | irlap_do_event(self, SLOT_TIMER_EXPIRED, NULL, NULL); |
150 | } |
151 | |
152 | /* |
153 | * Function irlap_query_timer_expired (data) |
154 | * |
155 | * IrLAP query timer has expired |
156 | * |
157 | */ |
158 | static void irlap_query_timer_expired(void *data) |
159 | { |
160 | struct irlap_cb *self = (struct irlap_cb *) data; |
161 | |
162 | IRDA_ASSERT(self != NULL, return;); |
163 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
164 | |
165 | irlap_do_event(self, QUERY_TIMER_EXPIRED, NULL, NULL); |
166 | } |
167 | |
168 | /* |
169 | * Function irda_final_timer_expired (data) |
170 | * |
171 | * |
172 | * |
173 | */ |
174 | static void irlap_final_timer_expired(void *data) |
175 | { |
176 | struct irlap_cb *self = (struct irlap_cb *) data; |
177 | |
178 | IRDA_ASSERT(self != NULL, return;); |
179 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
180 | |
181 | irlap_do_event(self, FINAL_TIMER_EXPIRED, NULL, NULL); |
182 | } |
183 | |
184 | /* |
185 | * Function irda_wd_timer_expired (data) |
186 | * |
187 | * |
188 | * |
189 | */ |
190 | static void irlap_wd_timer_expired(void *data) |
191 | { |
192 | struct irlap_cb *self = (struct irlap_cb *) data; |
193 | |
194 | IRDA_ASSERT(self != NULL, return;); |
195 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
196 | |
197 | irlap_do_event(self, WD_TIMER_EXPIRED, NULL, NULL); |
198 | } |
199 | |
200 | /* |
201 | * Function irda_backoff_timer_expired (data) |
202 | * |
203 | * |
204 | * |
205 | */ |
206 | static void irlap_backoff_timer_expired(void *data) |
207 | { |
208 | struct irlap_cb *self = (struct irlap_cb *) data; |
209 | |
210 | IRDA_ASSERT(self != NULL, return;); |
211 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
212 | |
213 | irlap_do_event(self, BACKOFF_TIMER_EXPIRED, NULL, NULL); |
214 | } |
215 | |
216 | |
217 | /* |
218 | * Function irtty_media_busy_expired (data) |
219 | * |
220 | * |
221 | */ |
222 | static void irlap_media_busy_expired(void *data) |
223 | { |
224 | struct irlap_cb *self = (struct irlap_cb *) data; |
225 | |
226 | IRDA_ASSERT(self != NULL, return;); |
227 | |
228 | irda_device_set_media_busy(self->netdev, FALSE); |
229 | /* Note : the LAP event will be send in irlap_stop_mbusy_timer(), |
230 | * to catch other cases where the flag is cleared (for example |
231 | * after a discovery) - Jean II */ |
232 | } |
233 |
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