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
agrtimer_init(struct agr_softc * sc)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
agrtimer_destroy(struct agr_softc * sc)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
agrtimer_start(struct agr_softc * sc)70 agrtimer_start(struct agr_softc *sc)
71 {
72
73 callout_schedule(&sc->sc_callout, 0);
74 }
75
76 void
agrtimer_stop(struct agr_softc * sc)77 agrtimer_stop(struct agr_softc *sc)
78 {
79
80 callout_stop(&sc->sc_callout);
81 }
82
83 static void
agrtimer_tick(void * arg)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
agrtimer_work(struct work * wk,void * arg)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
agrtimer_port_tick(struct agr_port * port,void * arg)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