437ffe1823
a new bpf_mtap2 routine that does the right thing for an mbuf and a variable-length chunk of data that should be prepended. o while we're sweeping the drivers, use u_int32_t uniformly when when prepending the address family (several places were assuming sizeof(int) was 4) o return M_ASSERTVALID to BPF_MTAP* now that all stack-allocated mbufs have been eliminated; this may better be moved to the bpf routines Reviewed by: arch@ and several others
434 lines
8.7 KiB
C
434 lines
8.7 KiB
C
/*-
|
|
* Copyright (c) 1998, 2001 Nicolas Souchu
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/*
|
|
* I2C bus IP driver
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/filio.h>
|
|
#include <sys/sockio.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/time.h>
|
|
#include <sys/malloc.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_types.h>
|
|
#include <net/netisr.h>
|
|
|
|
#include <sys/mbuf.h>
|
|
#include <sys/socket.h>
|
|
#include <net/netisr.h>
|
|
#include <net/route.h>
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_systm.h>
|
|
#include <netinet/in_var.h>
|
|
#include <netinet/ip.h>
|
|
#include <netinet/if_ether.h>
|
|
|
|
#include <net/bpf.h>
|
|
|
|
#include <dev/iicbus/iiconf.h>
|
|
#include <dev/iicbus/iicbus.h>
|
|
|
|
#include "iicbus_if.h"
|
|
|
|
#define PCF_MASTER_ADDRESS 0xaa
|
|
|
|
#define ICHDRLEN sizeof(u_int32_t)
|
|
#define ICMTU 1500 /* default mtu */
|
|
|
|
struct ic_softc {
|
|
struct ifnet ic_if;
|
|
|
|
u_char ic_addr; /* peer I2C address */
|
|
|
|
int ic_sending;
|
|
|
|
char *ic_obuf;
|
|
char *ic_ifbuf;
|
|
char *ic_cp;
|
|
|
|
int ic_xfercnt;
|
|
|
|
int ic_iferrs;
|
|
};
|
|
|
|
static devclass_t ic_devclass;
|
|
|
|
static int icprobe(device_t);
|
|
static int icattach(device_t);
|
|
|
|
static int icioctl(struct ifnet *, u_long, caddr_t);
|
|
static int icoutput(struct ifnet *, struct mbuf *, struct sockaddr *,
|
|
struct rtentry *);
|
|
|
|
static void icintr(device_t, int, char *);
|
|
|
|
static device_method_t ic_methods[] = {
|
|
/* device interface */
|
|
DEVMETHOD(device_probe, icprobe),
|
|
DEVMETHOD(device_attach, icattach),
|
|
|
|
/* iicbus interface */
|
|
DEVMETHOD(iicbus_intr, icintr),
|
|
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t ic_driver = {
|
|
"ic",
|
|
ic_methods,
|
|
sizeof(struct ic_softc),
|
|
};
|
|
|
|
/*
|
|
* icprobe()
|
|
*/
|
|
static int
|
|
icprobe(device_t dev)
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* icattach()
|
|
*/
|
|
static int
|
|
icattach(device_t dev)
|
|
{
|
|
struct ic_softc *sc = (struct ic_softc *)device_get_softc(dev);
|
|
struct ifnet *ifp = &sc->ic_if;
|
|
|
|
sc->ic_addr = PCF_MASTER_ADDRESS; /* XXX only PCF masters */
|
|
|
|
ifp->if_softc = sc;
|
|
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
|
|
ifp->if_mtu = ICMTU;
|
|
ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST;
|
|
ifp->if_ioctl = icioctl;
|
|
ifp->if_output = icoutput;
|
|
ifp->if_type = IFT_PARA;
|
|
ifp->if_hdrlen = 0;
|
|
ifp->if_addrlen = 0;
|
|
ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
|
|
|
|
if_attach(ifp);
|
|
|
|
bpfattach(ifp, DLT_NULL, ICHDRLEN);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* iciotcl()
|
|
*/
|
|
static int
|
|
icioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
|
|
{
|
|
device_t icdev = devclass_get_device(ic_devclass, ifp->if_dunit);
|
|
device_t parent = device_get_parent(icdev);
|
|
struct ic_softc *sc = (struct ic_softc *)device_get_softc(icdev);
|
|
|
|
struct ifaddr *ifa = (struct ifaddr *)data;
|
|
struct ifreq *ifr = (struct ifreq *)data;
|
|
|
|
u_char *iptr, *optr;
|
|
int error;
|
|
|
|
switch (cmd) {
|
|
|
|
case SIOCSIFDSTADDR:
|
|
case SIOCAIFADDR:
|
|
case SIOCSIFADDR:
|
|
if (ifa->ifa_addr->sa_family != AF_INET)
|
|
return EAFNOSUPPORT;
|
|
ifp->if_flags |= IFF_UP;
|
|
/* FALLTHROUGH */
|
|
case SIOCSIFFLAGS:
|
|
if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) {
|
|
|
|
/* XXX disable PCF */
|
|
ifp->if_flags &= ~IFF_RUNNING;
|
|
|
|
/* IFF_UP is not set, try to release the bus anyway */
|
|
iicbus_release_bus(parent, icdev);
|
|
break;
|
|
}
|
|
if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) {
|
|
|
|
if ((error = iicbus_request_bus(parent, icdev, IIC_WAIT|IIC_INTR)))
|
|
return (error);
|
|
|
|
sc->ic_obuf = malloc(sc->ic_if.if_mtu + ICHDRLEN,
|
|
M_DEVBUF, M_WAITOK);
|
|
if (!sc->ic_obuf) {
|
|
iicbus_release_bus(parent, icdev);
|
|
return ENOBUFS;
|
|
}
|
|
|
|
sc->ic_ifbuf = malloc(sc->ic_if.if_mtu + ICHDRLEN,
|
|
M_DEVBUF, M_WAITOK);
|
|
if (!sc->ic_ifbuf) {
|
|
iicbus_release_bus(parent, icdev);
|
|
return ENOBUFS;
|
|
}
|
|
|
|
iicbus_reset(parent, IIC_FASTEST, 0, NULL);
|
|
|
|
ifp->if_flags |= IFF_RUNNING;
|
|
}
|
|
break;
|
|
|
|
case SIOCSIFMTU:
|
|
/* save previous buffers */
|
|
iptr = sc->ic_ifbuf;
|
|
optr = sc->ic_obuf;
|
|
|
|
/* allocate input buffer */
|
|
sc->ic_ifbuf = malloc(ifr->ifr_mtu+ICHDRLEN, M_DEVBUF, M_NOWAIT);
|
|
if (!sc->ic_ifbuf) {
|
|
|
|
sc->ic_ifbuf = iptr;
|
|
sc->ic_obuf = optr;
|
|
|
|
return ENOBUFS;
|
|
}
|
|
|
|
/* allocate output buffer */
|
|
sc->ic_ifbuf = malloc(ifr->ifr_mtu+ICHDRLEN, M_DEVBUF, M_NOWAIT);
|
|
if (!sc->ic_obuf) {
|
|
|
|
free(sc->ic_ifbuf,M_DEVBUF);
|
|
|
|
sc->ic_ifbuf = iptr;
|
|
sc->ic_obuf = optr;
|
|
|
|
return ENOBUFS;
|
|
}
|
|
|
|
if (iptr)
|
|
free(iptr,M_DEVBUF);
|
|
|
|
if (optr)
|
|
free(optr,M_DEVBUF);
|
|
|
|
sc->ic_if.if_mtu = ifr->ifr_mtu;
|
|
break;
|
|
|
|
case SIOCGIFMTU:
|
|
ifr->ifr_mtu = sc->ic_if.if_mtu;
|
|
break;
|
|
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
if (ifr == 0) {
|
|
return EAFNOSUPPORT; /* XXX */
|
|
}
|
|
switch (ifr->ifr_addr.sa_family) {
|
|
|
|
case AF_INET:
|
|
break;
|
|
|
|
default:
|
|
return EAFNOSUPPORT;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* icintr()
|
|
*/
|
|
static void
|
|
icintr (device_t dev, int event, char *ptr)
|
|
{
|
|
struct ic_softc *sc = (struct ic_softc *)device_get_softc(dev);
|
|
int unit = device_get_unit(dev);
|
|
int s, len;
|
|
struct mbuf *top;
|
|
|
|
s = splhigh();
|
|
|
|
switch (event) {
|
|
|
|
case INTR_GENERAL:
|
|
case INTR_START:
|
|
sc->ic_cp = sc->ic_ifbuf;
|
|
sc->ic_xfercnt = 0;
|
|
break;
|
|
|
|
case INTR_STOP:
|
|
|
|
/* if any error occured during transfert,
|
|
* drop the packet */
|
|
if (sc->ic_iferrs)
|
|
goto err;
|
|
|
|
if ((len = sc->ic_xfercnt) == 0)
|
|
break; /* ignore */
|
|
|
|
if (len <= ICHDRLEN)
|
|
goto err;
|
|
|
|
len -= ICHDRLEN;
|
|
sc->ic_if.if_ipackets ++;
|
|
sc->ic_if.if_ibytes += len;
|
|
|
|
BPF_TAP(&sc->ic_if, sc->ic_ifbuf, len + ICHDRLEN);
|
|
|
|
top = m_devget(sc->ic_ifbuf + ICHDRLEN, len, 0, &sc->ic_if, 0);
|
|
|
|
if (top)
|
|
netisr_dispatch(NETISR_IP, top);
|
|
break;
|
|
|
|
err:
|
|
printf("ic%d: errors (%d)!\n", unit, sc->ic_iferrs);
|
|
|
|
sc->ic_iferrs = 0; /* reset error count */
|
|
sc->ic_if.if_ierrors ++;
|
|
|
|
break;
|
|
|
|
case INTR_RECEIVE:
|
|
if (sc->ic_xfercnt >= sc->ic_if.if_mtu+ICHDRLEN) {
|
|
sc->ic_iferrs ++;
|
|
|
|
} else {
|
|
*sc->ic_cp++ = *ptr;
|
|
sc->ic_xfercnt ++;
|
|
}
|
|
break;
|
|
|
|
case INTR_NOACK: /* xfer terminated by master */
|
|
break;
|
|
|
|
case INTR_TRANSMIT:
|
|
*ptr = 0xff; /* XXX */
|
|
break;
|
|
|
|
case INTR_ERROR:
|
|
sc->ic_iferrs ++;
|
|
break;
|
|
|
|
default:
|
|
panic("%s: unknown event (%d)!", __func__, event);
|
|
}
|
|
|
|
splx(s);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* icoutput()
|
|
*/
|
|
static int
|
|
icoutput(struct ifnet *ifp, struct mbuf *m,
|
|
struct sockaddr *dst, struct rtentry *rt)
|
|
{
|
|
device_t icdev = devclass_get_device(ic_devclass, ifp->if_dunit);
|
|
device_t parent = device_get_parent(icdev);
|
|
struct ic_softc *sc = (struct ic_softc *)device_get_softc(icdev);
|
|
|
|
int s, len, sent;
|
|
struct mbuf *mm;
|
|
u_char *cp;
|
|
u_int32_t hdr = dst->sa_family;
|
|
|
|
ifp->if_flags |= IFF_RUNNING;
|
|
|
|
s = splhigh();
|
|
|
|
/* already sending? */
|
|
if (sc->ic_sending) {
|
|
ifp->if_oerrors ++;
|
|
goto error;
|
|
}
|
|
|
|
/* insert header */
|
|
bcopy ((char *)&hdr, sc->ic_obuf, ICHDRLEN);
|
|
|
|
cp = sc->ic_obuf + ICHDRLEN;
|
|
len = 0;
|
|
mm = m;
|
|
do {
|
|
if (len + mm->m_len > sc->ic_if.if_mtu) {
|
|
/* packet to large */
|
|
ifp->if_oerrors ++;
|
|
goto error;
|
|
}
|
|
|
|
bcopy(mtod(mm,char *), cp, mm->m_len);
|
|
cp += mm->m_len;
|
|
len += mm->m_len;
|
|
|
|
} while ((mm = mm->m_next));
|
|
|
|
BPF_MTAP2(ifp, &hdr, sizeof(hdr), m);
|
|
|
|
sc->ic_sending = 1;
|
|
|
|
m_freem(m);
|
|
splx(s);
|
|
|
|
/* send the packet */
|
|
if (iicbus_block_write(parent, sc->ic_addr, sc->ic_obuf,
|
|
len + ICHDRLEN, &sent))
|
|
|
|
ifp->if_oerrors ++;
|
|
else {
|
|
ifp->if_opackets ++;
|
|
ifp->if_obytes += len;
|
|
}
|
|
|
|
sc->ic_sending = 0;
|
|
|
|
return (0);
|
|
|
|
error:
|
|
m_freem(m);
|
|
splx(s);
|
|
|
|
return(0);
|
|
}
|
|
|
|
DRIVER_MODULE(ic, iicbus, ic_driver, ic_devclass, 0, 0);
|
|
MODULE_DEPEND(ic, iicbus, IICBUS_MINVER, IICBUS_PREFVER, IICBUS_MAXVER);
|
|
MODULE_VERSION(ic, 1);
|