/********************************************************************* * * Filename: timer.c * Version: * Description: * Status: Experimental. * Author: Dag Brattli <dagb@cs.uit.no> * Created at: Sat Aug 16 00:59:29 1997 * Modified at: Wed Dec 8 12:50:34 1999 * Modified by: Dag Brattli <dagb@cs.uit.no> * * Copyright (c) 1997, 1999 Dag Brattli <dagb@cs.uit.no>, * All Rights Reserved. * Copyright (c) 2000-2002 Jean Tourrilhes <jt@hpl.hp.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * Neither Dag Brattli nor University of Tromsø admit liability nor * provide warranty for any of this software. This material is * provided "AS-IS" and at no charge. * ********************************************************************/ #include <asm/system.h> #include <linux/delay.h> #include <net/irda/timer.h> #include <net/irda/irda.h> #include <net/irda/irda_device.h> #include <net/irda/irlap.h> #include <net/irda/irlmp.h> extern int sysctl_slot_timeout; static void irlap_slot_timer_expired(void* data); static void irlap_query_timer_expired(void* data); static void irlap_final_timer_expired(void* data); static void irlap_wd_timer_expired(void* data); static void irlap_backoff_timer_expired(void* data); static void irlap_media_busy_expired(void* data); void irlap_start_slot_timer(struct irlap_cb *self, int timeout) { irda_start_timer(&self->slot_timer, timeout, (void *) self, irlap_slot_timer_expired); } void irlap_start_query_timer(struct irlap_cb *self, int S, int s) { int timeout; /* Calculate when the peer discovery should end. Normally, we * get the end-of-discovery frame, so this is just in case * we miss it. * Basically, we multiply the number of remaining slots by our * slot time, plus add some extra time to properly receive the last * discovery packet (which is longer due to extra discovery info), * to avoid messing with for incomming connections requests and * to accomodate devices that perform discovery slower than us. * Jean II */ timeout = ((sysctl_slot_timeout * HZ / 1000) * (S - s) + XIDEXTRA_TIMEOUT + SMALLBUSY_TIMEOUT); /* Set or re-set the timer. We reset the timer for each received * discovery query, which allow us to automatically adjust to * the speed of the peer discovery (faster or slower). Jean II */ irda_start_timer( &self->query_timer, timeout, (void *) self, irlap_query_timer_expired); } void irlap_start_final_timer(struct irlap_cb *self, int timeout) { irda_start_timer(&self->final_timer, timeout, (void *) self, irlap_final_timer_expired); } void irlap_start_wd_timer(struct irlap_cb *self, int timeout) { irda_start_timer(&self->wd_timer, timeout, (void *) self, irlap_wd_timer_expired); } void irlap_start_backoff_timer(struct irlap_cb *self, int timeout) { irda_start_timer(&self->backoff_timer, timeout, (void *) self, irlap_backoff_timer_expired); } void irlap_start_mbusy_timer(struct irlap_cb *self, int timeout) { irda_start_timer(&self->media_busy_timer, timeout, (void *) self, irlap_media_busy_expired); } void irlap_stop_mbusy_timer(struct irlap_cb *self) { /* If timer is activated, kill it! */ del_timer(&self->media_busy_timer); /* If we are in NDM, there is a bunch of events in LAP that * that be pending due to the media_busy condition, such as * CONNECT_REQUEST and SEND_UI_FRAME. If we don't generate * an event, they will wait forever... * Jean II */ if (self->state == LAP_NDM) irlap_do_event(self, MEDIA_BUSY_TIMER_EXPIRED, NULL, NULL); } void irlmp_start_watchdog_timer(struct lsap_cb *self, int timeout) { irda_start_timer(&self->watchdog_timer, timeout, (void *) self, irlmp_watchdog_timer_expired); } void irlmp_start_discovery_timer(struct irlmp_cb *self, int timeout) { irda_start_timer(&self->discovery_timer, timeout, (void *) self, irlmp_discovery_timer_expired); } void irlmp_start_idle_timer(struct lap_cb *self, int timeout) { irda_start_timer(&self->idle_timer, timeout, (void *) self, irlmp_idle_timer_expired); } void irlmp_stop_idle_timer(struct lap_cb *self) { /* If timer is activated, kill it! */ del_timer(&self->idle_timer); } /* * Function irlap_slot_timer_expired (data) * * IrLAP slot timer has expired * */ static void irlap_slot_timer_expired(void *data) { struct irlap_cb *self = (struct irlap_cb *) data; IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == LAP_MAGIC, return;); irlap_do_event(self, SLOT_TIMER_EXPIRED, NULL, NULL); } /* * Function irlap_query_timer_expired (data) * * IrLAP query timer has expired * */ static void irlap_query_timer_expired(void *data) { struct irlap_cb *self = (struct irlap_cb *) data; IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == LAP_MAGIC, return;); irlap_do_event(self, QUERY_TIMER_EXPIRED, NULL, NULL); } /* * Function irda_final_timer_expired (data) * * * */ static void irlap_final_timer_expired(void *data) { struct irlap_cb *self = (struct irlap_cb *) data; IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == LAP_MAGIC, return;); irlap_do_event(self, FINAL_TIMER_EXPIRED, NULL, NULL); } /* * Function irda_wd_timer_expired (data) * * * */ static void irlap_wd_timer_expired(void *data) { struct irlap_cb *self = (struct irlap_cb *) data; IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == LAP_MAGIC, return;); irlap_do_event(self, WD_TIMER_EXPIRED, NULL, NULL); } /* * Function irda_backoff_timer_expired (data) * * * */ static void irlap_backoff_timer_expired(void *data) { struct irlap_cb *self = (struct irlap_cb *) data; IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == LAP_MAGIC, return;); irlap_do_event(self, BACKOFF_TIMER_EXPIRED, NULL, NULL); } /* * Function irtty_media_busy_expired (data) * * */ static void irlap_media_busy_expired(void *data) { struct irlap_cb *self = (struct irlap_cb *) data; IRDA_ASSERT(self != NULL, return;); irda_device_set_media_busy(self->netdev, FALSE); /* Note : the LAP event will be send in irlap_stop_mbusy_timer(), * to catch other cases where the flag is cleared (for example * after a discovery) - Jean II */ }