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      1 /*	$NetBSD: if_agrtimer.c,v 1.7 2017/01/28 22:56:09 maya Exp $	*/
      2 
      3 /*-
      4  * Copyright (c)2005 YAMAMOTO Takashi,
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: if_agrtimer.c,v 1.7 2017/01/28 22:56:09 maya Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/callout.h>
     34 #include <sys/systm.h>
     35 #include <sys/kernel.h>
     36 
     37 #include <net/if.h>
     38 
     39 #include <net/agr/if_agrvar_impl.h>
     40 #include <net/agr/if_agrsubr.h>
     41 
     42 static void agrtimer_tick(void *);
     43 static void agrtimer_work(struct work *, void *);
     44 static int agrtimer_port_tick(struct agr_port *, void *);
     45 
     46 int
     47 agrtimer_init(struct agr_softc *sc)
     48 {
     49 	int error;
     50 
     51 	error = workqueue_create(&sc->sc_wq, "agrmon",
     52 	    agrtimer_work, sc, PRI_SOFTNET, IPL_SOFTNET, 0);
     53 	if (error)
     54 		return error;
     55 
     56 	callout_init(&sc->sc_callout, 0);
     57 	callout_setfunc(&sc->sc_callout, agrtimer_tick, sc);
     58 	return 0;
     59 }
     60 
     61 void
     62 agrtimer_destroy(struct agr_softc *sc)
     63 {
     64 
     65 	callout_destroy(&sc->sc_callout);
     66 	workqueue_destroy(sc->sc_wq);
     67 }
     68 
     69 void
     70 agrtimer_start(struct agr_softc *sc)
     71 {
     72 
     73 	callout_schedule(&sc->sc_callout, 0);
     74 }
     75 
     76 void
     77 agrtimer_stop(struct agr_softc *sc)
     78 {
     79 
     80 	callout_stop(&sc->sc_callout);
     81 }
     82 
     83 static void
     84 agrtimer_tick(void *arg)
     85 {
     86 	struct agr_softc *sc = arg;
     87 
     88 	workqueue_enqueue(sc->sc_wq, &sc->sc_wk, NULL);
     89 }
     90 
     91 static void
     92 agrtimer_work(struct work *wk, void *arg)
     93 {
     94 	struct agr_softc *sc = arg;
     95 	const struct agr_iftype_ops *iftop = sc->sc_iftop;
     96 
     97 	KASSERT(iftop);
     98 
     99 	AGR_LOCK(sc);
    100 	if (iftop->iftop_tick) {
    101 		(*iftop->iftop_tick)(sc);
    102 	}
    103 	if (iftop->iftop_porttick) {
    104 		agr_port_foreach(sc, agrtimer_port_tick, sc);
    105 	}
    106 	callout_schedule(&sc->sc_callout, hz);
    107 	AGR_UNLOCK(sc);
    108 }
    109 
    110 static int
    111 agrtimer_port_tick(struct agr_port *port, void *arg)
    112 {
    113 	struct agr_softc *sc = arg;
    114 
    115 	agrport_monitor(port);
    116 	(*sc->sc_iftop->iftop_porttick)(sc, port);
    117 
    118 	return 0;
    119 }
    120