timer.c 6.3 KB

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