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NetBSD/sys/dev/isa/if_el.c
dyoung de87fe677d *** Summary *** 
When a link-layer address changes (e.g., ifconfig ex0 link
02🇩🇪ad:be:ef:02 active), send a gratuitous ARP and/or a Neighbor
Advertisement to update the network-/link-layer address bindings
on our LAN peers.

Refuse a change of ethernet address to the address 00:00:00:00:00:00
or to any multicast/broadcast address.  (Thanks matt@.)

Reorder ifnet ioctl operations so that driver ioctls may inherit
the functions of their "class"---ether_ioctl(), fddi_ioctl(), et
cetera---and the class ioctls may inherit from the generic ioctl,
ifioctl_common(), but both driver- and class-ioctls may override
the generic behavior.  Make network drivers share more code.

Distinguish a "factory" link-layer address from others for the
purposes of both protecting that address from deletion and computing
EUI64.

Return consistent, appropriate error codes from network drivers.

Improve readability.  KNF.

*** Details ***

In if_attach(), always initialize the interface ioctl routine,
ifnet->if_ioctl, if the driver has not already initialized it.
Delete if_ioctl == NULL tests everywhere else, because it cannot
happen.

In the ioctl routines of network interfaces, inherit common ioctl
behaviors by calling either ifioctl_common() or whichever ioctl
routine is appropriate for the class of interface---e.g., ether_ioctl()
for ethernets.

Stop (ab)using SIOCSIFADDR and start to use SIOCINITIFADDR.  In
the user->kernel interface, SIOCSIFADDR's argument was an ifreq,
but on the protocol->ifnet interface, SIOCSIFADDR's argument was
an ifaddr.  That was confusing, and it would work against me as I
make it possible for a network interface to overload most ioctls.
On the protocol->ifnet interface, replace SIOCSIFADDR with
SIOCINITIFADDR.  In ifioctl(), return EPERM if userland tries to
invoke SIOCINITIFADDR.

In ifioctl(), give the interface the first shot at handling most
interface ioctls, and give the protocol the second shot, instead
of the other way around. Finally, let compatibility code (COMPAT_OSOCK)
take a shot.

Pull device initialization out of switch statements under
SIOCINITIFADDR.  For example, pull ..._init() out of any switch
statement that looks like this:

        switch (...->sa_family) {
        case ...:
                ..._init();
                ...
                break;
        ...
        default:
                ..._init();
                ...
                break;
        }

Rewrite many if-else clauses that handle all permutations of IFF_UP
and IFF_RUNNING to use a switch statement,

        switch (x & (IFF_UP|IFF_RUNNING)) {
        case 0:
                ...
                break;
        case IFF_RUNNING:
                ...
                break;
        case IFF_UP:
                ...
                break;
        case IFF_UP|IFF_RUNNING:
                ...
                break;
        }

unifdef lots of code containing #ifdef FreeBSD, #ifdef NetBSD, and
#ifdef SIOCSIFMTU, especially in fwip(4) and in ndis(4).

In ipw(4), remove an if_set_sadl() call that is out of place.

In nfe(4), reuse the jumbo MTU logic in ether_ioctl().

Let ethernets register a callback for setting h/w state such as
promiscuous mode and the multicast filter in accord with a change
in the if_flags: ether_set_ifflags_cb() registers a callback that
returns ENETRESET if the caller should reset the ethernet by calling
if_init(), 0 on success, != 0 on failure.  Pull common code from
ex(4), gem(4), nfe(4), sip(4), tlp(4), vge(4) into ether_ioctl(),
and register if_flags callbacks for those drivers.

Return ENOTTY instead of EINVAL for inappropriate ioctls.  In
zyd(4), use ENXIO instead of ENOTTY to indicate that the device is
not any longer attached.

Add to if_set_sadl() a boolean 'factory' argument that indicates
whether a link-layer address was assigned by the factory or some
other source.  In a comment, recommend using the factory address
for generating an EUI64, and update in6_get_hw_ifid() to prefer a
factory address to any other link-layer address.

Add a routing message, RTM_LLINFO_UPD, that tells protocols to
update the binding of network-layer addresses to link-layer addresses.
Implement this message in IPv4 and IPv6 by sending a gratuitous
ARP or a neighbor advertisement, respectively.  Generate RTM_LLINFO_UPD
messages on a change of an interface's link-layer address.

In ether_ioctl(), do not let SIOCALIFADDR set a link-layer address
that is broadcast/multicast or equal to 00:00:00:00:00:00.

Make ether_ioctl() call ifioctl_common() to handle ioctls that it
does not understand.

In gif(4), initialize if_softc and use it, instead of assuming that
the gif_softc and ifp overlap.

Let ifioctl_common() handle SIOCGIFADDR.

Sprinkle rtcache_invariants(), which checks on DIAGNOSTIC kernels
that certain invariants on a struct route are satisfied.

In agr(4), rewrite agr_ioctl_filter() to be a bit more explicit
about the ioctls that we do not allow on an agr(4) member interface.

bzero -> memset.  Delete unnecessary casts to void *.  Use
sockaddr_in_init() and sockaddr_in6_init().  Compare pointers with
NULL instead of "testing truth".  Replace some instances of (type
*)0 with NULL.  Change some K&R prototypes to ANSI C, and join
lines.
2008-11-07 00:20:01 +00:00

763 lines
16 KiB
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/* $NetBSD: if_el.c,v 1.81 2008/11/07 00:20:07 dyoung Exp $ */
/*
* Copyright (c) 1994, Matthew E. Kimmel. Permission is hereby granted
* to use, copy, modify and distribute this software provided that both
* the copyright notice and this permission notice appear in all copies
* of the software, derivative works or modified versions, and any
* portions thereof.
*/
/*
* 3COM Etherlink 3C501 device driver
*/
/*
* Bugs/possible improvements:
* - Does not currently support DMA
* - Does not currently support multicasts
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_el.c,v 1.81 2008/11/07 00:20:07 dyoung Exp $");
#include "opt_inet.h"
#include "bpfilter.h"
#include "rnd.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <sys/device.h>
#if NRND > 0
#include <sys/rnd.h>
#endif
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/if_ether.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_inarp.h>
#endif
#if NBPFILTER > 0
#include <net/bpf.h>
#include <net/bpfdesc.h>
#endif
#include <sys/cpu.h>
#include <sys/intr.h>
#include <sys/bus.h>
#include <dev/isa/isavar.h>
#include <dev/isa/if_elreg.h>
/* for debugging convenience */
#ifdef EL_DEBUG
#define DPRINTF(x) printf x
#else
#define DPRINTF(x)
#endif
/*
* per-line info and status
*/
struct el_softc {
struct device sc_dev;
void *sc_ih;
struct ethercom sc_ethercom; /* ethernet common */
bus_space_tag_t sc_iot; /* bus space identifier */
bus_space_handle_t sc_ioh; /* i/o handle */
#if NRND > 0
rndsource_element_t rnd_source;
#endif
};
/*
* prototypes
*/
int elintr(void *);
void elinit(struct el_softc *);
int elioctl(struct ifnet *, u_long, void *);
void elstart(struct ifnet *);
void elwatchdog(struct ifnet *);
void elreset(struct el_softc *);
void elstop(struct el_softc *);
static int el_xmit(struct el_softc *);
void elread(struct el_softc *, int);
struct mbuf *elget(struct el_softc *sc, int);
static inline void el_hardreset(struct el_softc *);
int elprobe(struct device *, struct cfdata *, void *);
void elattach(struct device *, struct device *, void *);
CFATTACH_DECL(el, sizeof(struct el_softc),
elprobe, elattach, NULL, NULL);
/*
* Probe routine.
*
* See if the card is there and at the right place.
* (XXX - cgd -- needs help)
*/
int
elprobe(struct device *parent, struct cfdata *match,
void *aux)
{
struct isa_attach_args *ia = aux;
bus_space_tag_t iot = ia->ia_iot;
bus_space_handle_t ioh;
int iobase;
u_int8_t station_addr[ETHER_ADDR_LEN];
u_int8_t i;
int rval;
rval = 0;
if (ia->ia_nio < 1)
return (0);
if (ia->ia_nirq < 1)
return (0);
if (ISA_DIRECT_CONFIG(ia))
return (0);
iobase = ia->ia_io[0].ir_addr;
if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
return (0);
if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ)
return (0);
/* First check the base. */
if (iobase < 0x200 || iobase > 0x3f0)
return 0;
/* Map i/o space. */
if (bus_space_map(iot, iobase, 16, 0, &ioh))
return 0;
/*
* Now attempt to grab the station address from the PROM and see if it
* contains the 3com vendor code.
*/
DPRINTF(("Probing 3c501 at 0x%x...\n", iobase));
/* Reset the board. */
DPRINTF(("Resetting board...\n"));
bus_space_write_1(iot, ioh, EL_AC, EL_AC_RESET);
delay(5);
bus_space_write_1(iot, ioh, EL_AC, 0);
/* Now read the address. */
DPRINTF(("Reading station address...\n"));
for (i = 0; i < ETHER_ADDR_LEN; i++) {
bus_space_write_1(iot, ioh, EL_GPBL, i);
station_addr[i] = bus_space_read_1(iot, ioh, EL_EAW);
}
DPRINTF(("Address is %s\n", ether_sprintf(station_addr)));
/*
* If the vendor code is ok, return a 1. We'll assume that whoever
* configured this system is right about the IRQ.
*/
if (station_addr[0] != 0x02 || station_addr[1] != 0x60 ||
station_addr[2] != 0x8c) {
DPRINTF(("Bad vendor code.\n"));
goto out;
}
DPRINTF(("Vendor code ok.\n"));
ia->ia_nio = 1;
ia->ia_io[0].ir_size = 16;
ia->ia_nirq = 1;
ia->ia_niomem = 0;
ia->ia_ndrq = 0;
rval = 1;
out:
bus_space_unmap(iot, ioh, 16);
return rval;
}
/*
* Attach the interface to the kernel data structures. By the time this is
* called, we know that the card exists at the given I/O address. We still
* assume that the IRQ given is correct.
*/
void
elattach(struct device *parent, struct device *self, void *aux)
{
struct el_softc *sc = (void *)self;
struct isa_attach_args *ia = aux;
bus_space_tag_t iot = ia->ia_iot;
bus_space_handle_t ioh;
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
u_int8_t myaddr[ETHER_ADDR_LEN];
u_int8_t i;
printf("\n");
DPRINTF(("Attaching %s...\n", device_xname(&sc->sc_dev)));
/* Map i/o space. */
if (bus_space_map(iot, ia->ia_io[0].ir_addr, 16, 0, &ioh)) {
aprint_error_dev(self, "can't map i/o space\n");
return;
}
sc->sc_iot = iot;
sc->sc_ioh = ioh;
/* Reset the board. */
bus_space_write_1(iot, ioh, EL_AC, EL_AC_RESET);
delay(5);
bus_space_write_1(iot, ioh, EL_AC, 0);
/* Now read the address. */
for (i = 0; i < ETHER_ADDR_LEN; i++) {
bus_space_write_1(iot, ioh, EL_GPBL, i);
myaddr[i] = bus_space_read_1(iot, ioh, EL_EAW);
}
/* Stop the board. */
elstop(sc);
/* Initialize ifnet structure. */
strlcpy(ifp->if_xname, device_xname(&sc->sc_dev), IFNAMSIZ);
ifp->if_softc = sc;
ifp->if_start = elstart;
ifp->if_ioctl = elioctl;
ifp->if_watchdog = elwatchdog;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS;
IFQ_SET_READY(&ifp->if_snd);
/* Now we can attach the interface. */
DPRINTF(("Attaching interface...\n"));
if_attach(ifp);
ether_ifattach(ifp, myaddr);
/* Print out some information for the user. */
printf("%s: address %s\n", device_xname(self), ether_sprintf(myaddr));
sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq,
IST_EDGE, IPL_NET, elintr, sc);
#if NRND > 0
DPRINTF(("Attaching to random...\n"));
rnd_attach_source(&sc->rnd_source, device_xname(&sc->sc_dev),
RND_TYPE_NET, 0);
#endif
DPRINTF(("elattach() finished.\n"));
}
/*
* Reset interface.
*/
void
elreset(sc)
struct el_softc *sc;
{
int s;
DPRINTF(("elreset()\n"));
s = splnet();
elstop(sc);
elinit(sc);
splx(s);
}
/*
* Stop interface.
*/
void
elstop(sc)
struct el_softc *sc;
{
bus_space_write_1(sc->sc_iot, sc->sc_ioh, EL_AC, 0);
}
/*
* Do a hardware reset of the board, and upload the ethernet address again in
* case the board forgets.
*/
static inline void
el_hardreset(sc)
struct el_softc *sc;
{
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
int i;
bus_space_write_1(iot, ioh, EL_AC, EL_AC_RESET);
delay(5);
bus_space_write_1(iot, ioh, EL_AC, 0);
for (i = 0; i < ETHER_ADDR_LEN; i++)
bus_space_write_1(iot, ioh, i,
CLLADDR(sc->sc_ethercom.ec_if.if_sadl)[i]);
}
/*
* Initialize interface.
*/
void
elinit(sc)
struct el_softc *sc;
{
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
/* First, reset the board. */
el_hardreset(sc);
/* Configure rx. */
DPRINTF(("Configuring rx...\n"));
if (ifp->if_flags & IFF_PROMISC)
bus_space_write_1(iot, ioh, EL_RXC,
EL_RXC_AGF | EL_RXC_DSHORT | EL_RXC_DDRIB |
EL_RXC_DOFLOW | EL_RXC_PROMISC);
else
bus_space_write_1(iot, ioh, EL_RXC,
EL_RXC_AGF | EL_RXC_DSHORT | EL_RXC_DDRIB |
EL_RXC_DOFLOW | EL_RXC_ABROAD);
bus_space_write_1(iot, ioh, EL_RBC, 0);
/* Configure TX. */
DPRINTF(("Configuring tx...\n"));
bus_space_write_1(iot, ioh, EL_TXC, 0);
/* Start reception. */
DPRINTF(("Starting reception...\n"));
bus_space_write_1(iot, ioh, EL_AC, EL_AC_IRQE | EL_AC_RX);
/* Set flags appropriately. */
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
/* And start output. */
elstart(ifp);
}
/*
* Start output on interface. Get datagrams from the queue and output them,
* giving the receiver a chance between datagrams. Call only from splnet or
* interrupt level!
*/
void
elstart(ifp)
struct ifnet *ifp;
{
struct el_softc *sc = ifp->if_softc;
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
struct mbuf *m, *m0;
int s, i, off, retries;
DPRINTF(("elstart()...\n"));
s = splnet();
/* Don't do anything if output is active. */
if ((ifp->if_flags & IFF_OACTIVE) != 0) {
splx(s);
return;
}
ifp->if_flags |= IFF_OACTIVE;
/*
* The main loop. They warned me against endless loops, but would I
* listen? NOOO....
*/
for (;;) {
/* Dequeue the next datagram. */
IFQ_DEQUEUE(&ifp->if_snd, m0);
/* If there's nothing to send, return. */
if (m0 == 0)
break;
#if NBPFILTER > 0
/* Give the packet to the bpf, if any. */
if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m0);
#endif
/* Disable the receiver. */
bus_space_write_1(iot, ioh, EL_AC, EL_AC_HOST);
bus_space_write_1(iot, ioh, EL_RBC, 0);
/* Transfer datagram to board. */
DPRINTF(("el: xfr pkt length=%d...\n", m0->m_pkthdr.len));
off = EL_BUFSIZ - max(m0->m_pkthdr.len,
ETHER_MIN_LEN - ETHER_CRC_LEN);
#ifdef DIAGNOSTIC
if ((off & 0xffff) != off)
printf("%s: bogus off 0x%x\n",
device_xname(&sc->sc_dev), off);
#endif
bus_space_write_1(iot, ioh, EL_GPBL, off & 0xff);
bus_space_write_1(iot, ioh, EL_GPBH, (off >> 8) & 0xff);
/* Copy the datagram to the buffer. */
for (m = m0; m != 0; m = m->m_next)
bus_space_write_multi_1(iot, ioh, EL_BUF,
mtod(m, u_int8_t *), m->m_len);
for (i = 0;
i < ETHER_MIN_LEN - ETHER_CRC_LEN - m0->m_pkthdr.len; i++)
bus_space_write_1(iot, ioh, EL_BUF, 0);
m_freem(m0);
/* Now transmit the datagram. */
retries = 0;
for (;;) {
bus_space_write_1(iot, ioh, EL_GPBL, off & 0xff);
bus_space_write_1(iot, ioh, EL_GPBH, (off >> 8) & 0xff);
if (el_xmit(sc)) {
ifp->if_oerrors++;
break;
}
/* Check out status. */
i = bus_space_read_1(iot, ioh, EL_TXS);
DPRINTF(("tx status=0x%x\n", i));
if ((i & EL_TXS_READY) == 0) {
DPRINTF(("el: err txs=%x\n", i));
if (i & (EL_TXS_COLL | EL_TXS_COLL16)) {
ifp->if_collisions++;
if ((i & EL_TXC_DCOLL16) == 0 &&
retries < 15) {
retries++;
bus_space_write_1(iot, ioh,
EL_AC, EL_AC_HOST);
}
} else {
ifp->if_oerrors++;
break;
}
} else {
ifp->if_opackets++;
break;
}
}
/*
* Now give the card a chance to receive.
* Gotta love 3c501s...
*/
(void)bus_space_read_1(iot, ioh, EL_AS);
bus_space_write_1(iot, ioh, EL_AC, EL_AC_IRQE | EL_AC_RX);
splx(s);
/* Interrupt here. */
s = splnet();
}
(void)bus_space_read_1(iot, ioh, EL_AS);
bus_space_write_1(iot, ioh, EL_AC, EL_AC_IRQE | EL_AC_RX);
ifp->if_flags &= ~IFF_OACTIVE;
splx(s);
}
/*
* This function actually attempts to transmit a datagram downloaded to the
* board. Call at splnet or interrupt, after downloading data! Returns 0 on
* success, non-0 on failure.
*/
static int
el_xmit(sc)
struct el_softc *sc;
{
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
int i;
/*
* XXX
* This busy-waits for the tx completion. Can we get an interrupt
* instead?
*/
DPRINTF(("el: xmit..."));
bus_space_write_1(iot, ioh, EL_AC, EL_AC_TXFRX);
i = 20000;
while ((bus_space_read_1(iot, ioh, EL_AS) & EL_AS_TXBUSY) && (i > 0))
i--;
if (i == 0) {
DPRINTF(("tx not ready\n"));
return -1;
}
DPRINTF(("%d cycles.\n", 20000 - i));
return 0;
}
/*
* Controller interrupt.
*/
int
elintr(arg)
void *arg;
{
struct el_softc *sc = arg;
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
u_int8_t rxstat;
int len;
DPRINTF(("elintr: "));
/* Check board status. */
if ((bus_space_read_1(iot, ioh, EL_AS) & EL_AS_RXBUSY) != 0) {
(void)bus_space_read_1(iot, ioh, EL_RXC);
bus_space_write_1(iot, ioh, EL_AC, EL_AC_IRQE | EL_AC_RX);
return 0;
}
for (;;) {
rxstat = bus_space_read_1(iot, ioh, EL_RXS);
if (rxstat & EL_RXS_STALE)
break;
/* If there's an overflow, reinit the board. */
if ((rxstat & EL_RXS_NOFLOW) == 0) {
DPRINTF(("overflow.\n"));
el_hardreset(sc);
/* Put board back into receive mode. */
if (sc->sc_ethercom.ec_if.if_flags & IFF_PROMISC)
bus_space_write_1(iot, ioh, EL_RXC,
EL_RXC_AGF | EL_RXC_DSHORT | EL_RXC_DDRIB |
EL_RXC_DOFLOW | EL_RXC_PROMISC);
else
bus_space_write_1(iot, ioh, EL_RXC,
EL_RXC_AGF | EL_RXC_DSHORT | EL_RXC_DDRIB |
EL_RXC_DOFLOW | EL_RXC_ABROAD);
(void)bus_space_read_1(iot, ioh, EL_AS);
bus_space_write_1(iot, ioh, EL_RBC, 0);
break;
}
/* Incoming packet. */
len = bus_space_read_1(iot, ioh, EL_RBL);
len |= bus_space_read_1(iot, ioh, EL_RBH) << 8;
DPRINTF(("receive len=%d rxstat=%x ", len, rxstat));
bus_space_write_1(iot, ioh, EL_AC, EL_AC_HOST);
/* Pass data up to upper levels. */
elread(sc, len);
/* Is there another packet? */
if ((bus_space_read_1(iot, ioh, EL_AS) & EL_AS_RXBUSY) != 0)
break;
#if NRND > 0
rnd_add_uint32(&sc->rnd_source, rxstat);
#endif
DPRINTF(("<rescan> "));
}
(void)bus_space_read_1(iot, ioh, EL_RXC);
bus_space_write_1(iot, ioh, EL_AC, EL_AC_IRQE | EL_AC_RX);
return 1;
}
/*
* Pass a packet to the higher levels.
*/
void
elread(sc, len)
struct el_softc *sc;
int len;
{
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
struct mbuf *m;
if (len <= sizeof(struct ether_header) ||
len > ETHER_MAX_LEN) {
printf("%s: invalid packet size %d; dropping\n",
device_xname(&sc->sc_dev), len);
ifp->if_ierrors++;
return;
}
/* Pull packet off interface. */
m = elget(sc, len);
if (m == 0) {
ifp->if_ierrors++;
return;
}
ifp->if_ipackets++;
#if NBPFILTER > 0
/*
* Check if there's a BPF listener on this interface.
* If so, hand off the raw packet to BPF.
*/
if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m);
#endif
(*ifp->if_input)(ifp, m);
}
/*
* Pull read data off a interface. Len is length of data, with local net
* header stripped. We copy the data into mbufs. When full cluster sized
* units are present we copy into clusters.
*/
struct mbuf *
elget(sc, totlen)
struct el_softc *sc;
int totlen;
{
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
struct mbuf *m, *m0, *newm;
int len;
MGETHDR(m0, M_DONTWAIT, MT_DATA);
if (m0 == 0)
return (0);
m0->m_pkthdr.rcvif = ifp;
m0->m_pkthdr.len = totlen;
len = MHLEN;
m = m0;
bus_space_write_1(iot, ioh, EL_GPBL, 0);
bus_space_write_1(iot, ioh, EL_GPBH, 0);
while (totlen > 0) {
if (totlen >= MINCLSIZE) {
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0)
goto bad;
len = MCLBYTES;
}
m->m_len = len = min(totlen, len);
bus_space_read_multi_1(iot, ioh, EL_BUF, mtod(m, u_int8_t *), len);
totlen -= len;
if (totlen > 0) {
MGET(newm, M_DONTWAIT, MT_DATA);
if (newm == 0)
goto bad;
len = MLEN;
m = m->m_next = newm;
}
}
bus_space_write_1(iot, ioh, EL_RBC, 0);
bus_space_write_1(iot, ioh, EL_AC, EL_AC_RX);
return (m0);
bad:
m_freem(m0);
return (0);
}
/*
* Process an ioctl request. This code needs some work - it looks pretty ugly.
*/
int
elioctl(struct ifnet *ifp, u_long cmd, void *data)
{
struct el_softc *sc = ifp->if_softc;
struct ifaddr *ifa = (struct ifaddr *)data;
int s, error = 0;
s = splnet();
switch (cmd) {
case SIOCINITIFADDR:
ifp->if_flags |= IFF_UP;
elinit(sc);
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
arp_ifinit(ifp, ifa);
break;
#endif
default:
break;
}
break;
case SIOCSIFFLAGS:
if ((error = ifioctl_common(ifp, cmd, data)) != 0)
break;
/* XXX re-use ether_ioctl() */
switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) {
case IFF_RUNNING:
/*
* If interface is marked down and it is running, then
* stop it.
*/
elstop(sc);
ifp->if_flags &= ~IFF_RUNNING;
break;
case IFF_UP:
/*
* If interface is marked up and it is stopped, then
* start it.
*/
elinit(sc);
break;
default:
/*
* Some other important flag might have changed, so
* reset.
*/
elreset(sc);
break;
}
break;
default:
error = ether_ioctl(ifp, cmd, data);
break;
}
splx(s);
return error;
}
/*
* Device timeout routine.
*/
void
elwatchdog(ifp)
struct ifnet *ifp;
{
struct el_softc *sc = ifp->if_softc;
log(LOG_ERR, "%s: device timeout\n", device_xname(&sc->sc_dev));
sc->sc_ethercom.ec_if.if_oerrors++;
elreset(sc);
}
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