freebsd-dev/sys/dev/etherswitch/etherswitch.c
Luiz Otavio O Souza bca353cacb Convert etherswitch to use the make_dev_s(9) KPI. This fix a possible race
where si_drv1 can be accessed before it gets set.

MFC after:	3 days
Suggested by:	kib
Sponsored by:	Rubicon Communications, LLC (Netgate)
2017-01-08 20:37:41 +00:00

211 lines
5.6 KiB
C

/*-
* Copyright (c) 2011-2012 Stefan Bethke.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/socket.h>
#include <sys/sx.h>
#include <sys/systm.h>
#include <sys/uio.h>
#include <net/if.h>
#include <dev/etherswitch/etherswitch.h>
#include "etherswitch_if.h"
struct etherswitch_softc {
device_t sc_dev;
struct cdev *sc_devnode;
};
static int etherswitch_probe(device_t);
static int etherswitch_attach(device_t);
static int etherswitch_detach(device_t);
static void etherswitch_identify(driver_t *driver, device_t parent);
devclass_t etherswitch_devclass;
static device_method_t etherswitch_methods[] = {
/* device interface */
DEVMETHOD(device_identify, etherswitch_identify),
DEVMETHOD(device_probe, etherswitch_probe),
DEVMETHOD(device_attach, etherswitch_attach),
DEVMETHOD(device_detach, etherswitch_detach),
DEVMETHOD_END
};
driver_t etherswitch_driver = {
"etherswitch",
etherswitch_methods,
sizeof(struct etherswitch_softc),
};
static d_ioctl_t etherswitchioctl;
static struct cdevsw etherswitch_cdevsw = {
.d_version = D_VERSION,
.d_flags = D_TRACKCLOSE,
.d_ioctl = etherswitchioctl,
.d_name = "etherswitch",
};
static void
etherswitch_identify(driver_t *driver, device_t parent)
{
if (device_find_child(parent, "etherswitch", -1) == NULL)
BUS_ADD_CHILD(parent, 0, "etherswitch", -1);
}
static int
etherswitch_probe(device_t dev)
{
device_set_desc(dev, "Switch controller");
return (0);
}
static int
etherswitch_attach(device_t dev)
{
int err;
struct etherswitch_softc *sc;
struct make_dev_args devargs;
sc = device_get_softc(dev);
sc->sc_dev = dev;
make_dev_args_init(&devargs);
devargs.mda_devsw = &etherswitch_cdevsw;
devargs.mda_uid = UID_ROOT;
devargs.mda_gid = GID_WHEEL;
devargs.mda_mode = 0600;
devargs.mda_si_drv1 = sc;
err = make_dev_s(&devargs, &sc->sc_devnode, "etherswitch%d",
device_get_unit(dev));
if (err != 0) {
device_printf(dev, "failed to create character device\n");
return (ENXIO);
}
return (0);
}
static int
etherswitch_detach(device_t dev)
{
struct etherswitch_softc *sc = (struct etherswitch_softc *)device_get_softc(dev);
if (sc->sc_devnode)
destroy_dev(sc->sc_devnode);
return (0);
}
static int
etherswitchioctl(struct cdev *cdev, u_long cmd, caddr_t data, int flags, struct thread *td)
{
struct etherswitch_softc *sc = cdev->si_drv1;
device_t dev = sc->sc_dev;
device_t etherswitch = device_get_parent(dev);
etherswitch_conf_t conf;
etherswitch_info_t *info;
etherswitch_reg_t *reg;
etherswitch_phyreg_t *phyreg;
int error = 0;
switch (cmd) {
case IOETHERSWITCHGETINFO:
info = ETHERSWITCH_GETINFO(etherswitch);
bcopy(info, data, sizeof(etherswitch_info_t));
break;
case IOETHERSWITCHGETREG:
reg = (etherswitch_reg_t *)data;
ETHERSWITCH_LOCK(etherswitch);
reg->val = ETHERSWITCH_READREG(etherswitch, reg->reg);
ETHERSWITCH_UNLOCK(etherswitch);
break;
case IOETHERSWITCHSETREG:
reg = (etherswitch_reg_t *)data;
ETHERSWITCH_LOCK(etherswitch);
error = ETHERSWITCH_WRITEREG(etherswitch, reg->reg, reg->val);
ETHERSWITCH_UNLOCK(etherswitch);
break;
case IOETHERSWITCHGETPORT:
error = ETHERSWITCH_GETPORT(etherswitch, (etherswitch_port_t *)data);
break;
case IOETHERSWITCHSETPORT:
error = ETHERSWITCH_SETPORT(etherswitch, (etherswitch_port_t *)data);
break;
case IOETHERSWITCHGETVLANGROUP:
error = ETHERSWITCH_GETVGROUP(etherswitch, (etherswitch_vlangroup_t *)data);
break;
case IOETHERSWITCHSETVLANGROUP:
error = ETHERSWITCH_SETVGROUP(etherswitch, (etherswitch_vlangroup_t *)data);
break;
case IOETHERSWITCHGETPHYREG:
phyreg = (etherswitch_phyreg_t *)data;
phyreg->val = ETHERSWITCH_READPHYREG(etherswitch, phyreg->phy, phyreg->reg);
break;
case IOETHERSWITCHSETPHYREG:
phyreg = (etherswitch_phyreg_t *)data;
error = ETHERSWITCH_WRITEPHYREG(etherswitch, phyreg->phy, phyreg->reg, phyreg->val);
break;
case IOETHERSWITCHGETCONF:
bzero(&conf, sizeof(etherswitch_conf_t));
error = ETHERSWITCH_GETCONF(etherswitch, &conf);
bcopy(&conf, data, sizeof(etherswitch_conf_t));
break;
case IOETHERSWITCHSETCONF:
error = ETHERSWITCH_SETCONF(etherswitch, (etherswitch_conf_t *)data);
break;
default:
error = ENOTTY;
}
return (error);
}
MODULE_VERSION(etherswitch, 1);