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772 lines
18 KiB
C
772 lines
18 KiB
C
/* Copyright (c) 1994, Matthew E. Kimmel. Permission is hereby granted
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* to use, copy, modify and distribute this software provided that both
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* the copyright notice and this permission notice appear in all copies
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* of the software, derivative works or modified versions, and any
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* portions thereof.
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*
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* Questions, comments, bug reports and fixes to kimmel@cs.umass.edu.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/* Except of course for the portions of code lifted from other FreeBSD
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* drivers (mainly elread, elget and el_ioctl)
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*/
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/* 3COM Etherlink 3C501 device driver for FreeBSD */
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/* Yeah, I know these cards suck, but you can also get them for free
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* really easily...
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*/
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/* Bugs/possible improvements:
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* - Does not currently support DMA
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* - Does not currently support multicasts
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*/
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#include "opt_inet.h"
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#include "opt_ipx.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/sockio.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/syslog.h>
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#include <sys/bus.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#include <net/bpf.h>
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#include <machine/bus_pio.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/bus.h>
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#include <sys/rman.h>
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#include <isa/isavar.h>
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#include <i386/isa/if_elreg.h>
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/* For debugging convenience */
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#ifdef EL_DEBUG
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#define dprintf(x) printf x
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#else
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#define dprintf(x)
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#endif
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/* el_softc: per line info and status */
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struct el_softc {
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struct arpcom arpcom; /* Ethernet common */
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bus_space_handle_t el_bhandle;
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bus_space_tag_t el_btag;
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void *el_intrhand;
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struct resource *el_irq;
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struct resource *el_res;
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struct mtx el_mtx;
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char el_pktbuf[EL_BUFSIZ]; /* Frame buffer */
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};
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/* Prototypes */
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static int el_attach(device_t);
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static int el_detach(device_t);
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static void el_init(void *);
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static int el_ioctl(struct ifnet *,u_long,caddr_t);
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static int el_probe(device_t);
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static void el_start(struct ifnet *);
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static void el_reset(void *);
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static void el_watchdog(struct ifnet *);
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static int el_shutdown(device_t);
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static void el_stop(void *);
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static int el_xmit(struct el_softc *,int);
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static void elintr(void *);
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static __inline void elread(struct el_softc *,caddr_t,int);
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static struct mbuf *elget(caddr_t,int,struct ifnet *);
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static __inline void el_hardreset(void *);
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static device_method_t el_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, el_probe),
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DEVMETHOD(device_attach, el_attach),
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DEVMETHOD(device_detach, el_detach),
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DEVMETHOD(device_shutdown, el_shutdown),
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{ 0, 0 }
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};
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static driver_t el_driver = {
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"el",
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el_methods,
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sizeof(struct el_softc)
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};
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static devclass_t el_devclass;
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DRIVER_MODULE(if_el, isa, el_driver, el_devclass, 0, 0);
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#define CSR_WRITE_1(sc, reg, val) \
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bus_space_write_1(sc->el_btag, sc->el_bhandle, reg, val)
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#define CSR_READ_1(sc, reg) \
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bus_space_read_1(sc->el_btag, sc->el_bhandle, reg)
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#define EL_LOCK(_sc) mtx_lock(&(_sc)->el_mtx)
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#define EL_UNLOCK(_sc) mtx_unlock(&(_sc)->el_mtx)
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/* Probe routine. See if the card is there and at the right place. */
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static int
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el_probe(device_t dev)
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{
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struct el_softc *sc;
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u_short base; /* Just for convenience */
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u_char station_addr[ETHER_ADDR_LEN];
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int i, rid;
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/* Grab some info for our structure */
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sc = device_get_softc(dev);
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if (isa_get_logicalid(dev)) /* skip PnP probes */
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return (ENXIO);
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if ((base = bus_get_resource_start(dev, SYS_RES_IOPORT, 0)) == 0)
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return (ENXIO);
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/* First check the base */
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if((base < 0x280) || (base > 0x3f0)) {
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device_printf(dev,
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"ioaddr must be between 0x280 and 0x3f0\n");
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return(ENXIO);
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}
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/* Temporarily map the resources. */
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rid = 0;
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sc->el_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
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0, ~0, EL_IOSIZ, RF_ACTIVE);
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if (sc->el_res == NULL)
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return(ENXIO);
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sc->el_btag = rman_get_bustag(sc->el_res);
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sc->el_bhandle = rman_get_bushandle(sc->el_res);
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mtx_init(&sc->el_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
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MTX_DEF | MTX_RECURSE);
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EL_LOCK(sc);
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/* Now attempt to grab the station address from the PROM
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* and see if it contains the 3com vendor code.
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*/
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dprintf(("Probing 3c501 at 0x%x...\n",base));
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/* Reset the board */
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dprintf(("Resetting board...\n"));
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CSR_WRITE_1(sc,EL_AC,EL_AC_RESET);
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DELAY(5);
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CSR_WRITE_1(sc,EL_AC,0);
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dprintf(("Reading station address...\n"));
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/* Now read the address */
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for(i=0;i<ETHER_ADDR_LEN;i++) {
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CSR_WRITE_1(sc,EL_GPBL,i);
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station_addr[i] = CSR_READ_1(sc,EL_EAW);
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}
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/* Now release resources */
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bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->el_res);
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EL_UNLOCK(sc);
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mtx_destroy(&sc->el_mtx);
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dprintf(("Address is %6D\n",station_addr, ":"));
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/* If the vendor code is ok, return a 1. We'll assume that
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* whoever configured this system is right about the IRQ.
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*/
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if((station_addr[0] != 0x02) || (station_addr[1] != 0x60)
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|| (station_addr[2] != 0x8c)) {
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dprintf(("Bad vendor code.\n"));
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return(ENXIO);
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} else {
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dprintf(("Vendor code ok.\n"));
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/* Copy the station address into the arpcom structure */
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bcopy(station_addr,sc->arpcom.ac_enaddr,ETHER_ADDR_LEN);
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}
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device_set_desc(dev, "3Com 3c501 Ethernet");
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return(0);
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}
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/* Do a hardware reset of the 3c501. Do not call until after el_probe()! */
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static __inline void
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el_hardreset(xsc)
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void *xsc;
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{
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register struct el_softc *sc = xsc;
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register int j;
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/* First reset the board */
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CSR_WRITE_1(sc,EL_AC,EL_AC_RESET);
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DELAY(5);
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CSR_WRITE_1(sc,EL_AC,0);
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/* Then give it back its ethernet address. Thanks to the mach
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* source code for this undocumented goodie...
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*/
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for(j=0;j<ETHER_ADDR_LEN;j++)
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CSR_WRITE_1(sc,j,sc->arpcom.ac_enaddr[j]);
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}
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/* Attach the interface to the kernel data structures. By the time
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* this is called, we know that the card exists at the given I/O address.
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* We still assume that the IRQ given is correct.
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*/
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static int
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el_attach(device_t dev)
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{
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struct el_softc *sc;
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struct ifnet *ifp;
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int rid, error;
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dprintf(("Attaching el%d...\n",device_get_unit(dev)));
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/* Get things pointing to the right places. */
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sc = device_get_softc(dev);
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ifp = &sc->arpcom.ac_if;
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rid = 0;
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sc->el_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
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0, ~0, EL_IOSIZ, RF_ACTIVE);
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if (sc->el_res == NULL)
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return(ENXIO);
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rid = 0;
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sc->el_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
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RF_SHAREABLE | RF_ACTIVE);
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if (sc->el_irq == NULL) {
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bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->el_res);
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return(ENXIO);
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}
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error = bus_setup_intr(dev, sc->el_irq, INTR_TYPE_NET,
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elintr, sc, &sc->el_intrhand);
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if (error) {
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bus_release_resource(dev, SYS_RES_IRQ, 0, sc->el_irq);
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bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->el_res);
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return(ENXIO);
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}
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/* Now reset the board */
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dprintf(("Resetting board...\n"));
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el_hardreset(sc);
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/* Initialize ifnet structure */
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ifp->if_softc = sc;
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ifp->if_unit = device_get_unit(dev);;
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ifp->if_name = "el";
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ifp->if_mtu = ETHERMTU;
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ifp->if_start = el_start;
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ifp->if_ioctl = el_ioctl;
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ifp->if_watchdog = el_watchdog;
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ifp->if_init = el_init;
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ifp->if_flags = (IFF_BROADCAST | IFF_MULTICAST | IFF_SIMPLEX);
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ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
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/* Now we can attach the interface */
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dprintf(("Attaching interface...\n"));
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ether_ifattach(ifp, sc->arpcom.ac_enaddr);
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/* Print out some information for the user */
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device_printf(dev, "3c501 address %6D\n",
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sc->arpcom.ac_enaddr, ":");
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dprintf(("el_attach() finished.\n"));
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return(0);
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}
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static int el_detach(dev)
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device_t dev;
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{
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struct el_softc *sc;
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struct ifnet *ifp;
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sc = device_get_softc(dev);
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ifp = &sc->arpcom.ac_if;
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el_stop(sc);
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EL_LOCK(sc);
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ether_ifdetach(ifp);
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bus_teardown_intr(dev, sc->el_irq, sc->el_intrhand);
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bus_release_resource(dev, SYS_RES_IRQ, 0, sc->el_irq);
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bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->el_res);
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EL_UNLOCK(sc);
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mtx_destroy(&sc->el_mtx);
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return(0);
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}
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static int
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el_shutdown(dev)
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device_t dev;
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{
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struct el_softc *sc;
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sc = device_get_softc(dev);
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el_stop(sc);
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return(0);
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}
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/* This routine resets the interface. */
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static void
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el_reset(xsc)
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void *xsc;
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{
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struct el_softc *sc = xsc;
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dprintf(("elreset()\n"));
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el_stop(sc);
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el_init(sc);
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}
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static void el_stop(xsc)
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void *xsc;
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{
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struct el_softc *sc = xsc;
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EL_LOCK(sc);
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CSR_WRITE_1(sc,EL_AC,0);
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el_hardreset(sc);
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EL_UNLOCK(sc);
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}
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/* Initialize interface. */
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static void
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el_init(xsc)
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void *xsc;
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{
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struct el_softc *sc = xsc;
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struct ifnet *ifp;
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/* Set up pointers */
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ifp = &sc->arpcom.ac_if;
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/* If address not known, do nothing. */
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if(TAILQ_EMPTY(&ifp->if_addrhead)) /* XXX unlikely */
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return;
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EL_LOCK(sc);
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/* First, reset the board. */
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dprintf(("Resetting board...\n"));
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el_hardreset(sc);
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/* Configure rx */
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dprintf(("Configuring rx...\n"));
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if(ifp->if_flags & IFF_PROMISC)
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CSR_WRITE_1(sc,EL_RXC,
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(EL_RXC_PROMISC|EL_RXC_ABROAD|EL_RXC_AMULTI|
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EL_RXC_AGF|EL_RXC_DSHORT|EL_RXC_DDRIB|EL_RXC_DOFLOW));
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else
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CSR_WRITE_1(sc,EL_RXC,
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(EL_RXC_ABROAD|EL_RXC_AMULTI|
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EL_RXC_AGF|EL_RXC_DSHORT|EL_RXC_DDRIB|EL_RXC_DOFLOW));
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CSR_WRITE_1(sc,EL_RBC,0);
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/* Configure TX */
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dprintf(("Configuring tx...\n"));
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CSR_WRITE_1(sc,EL_TXC,0);
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/* Start reception */
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dprintf(("Starting reception...\n"));
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CSR_WRITE_1(sc,EL_AC,(EL_AC_IRQE|EL_AC_RX));
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/* Set flags appropriately */
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ifp->if_flags |= IFF_RUNNING;
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ifp->if_flags &= ~IFF_OACTIVE;
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/* And start output. */
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el_start(ifp);
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EL_UNLOCK(sc);
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}
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/* Start output on interface. Get datagrams from the queue and output
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* them, giving the receiver a chance between datagrams. Call only
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* from splimp or interrupt level!
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*/
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static void
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el_start(struct ifnet *ifp)
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{
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struct el_softc *sc;
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struct mbuf *m, *m0;
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int i, len, retries, done;
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/* Get things pointing in the right directions */
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sc = ifp->if_softc;
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dprintf(("el_start()...\n"));
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EL_LOCK(sc);
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/* Don't do anything if output is active */
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if(sc->arpcom.ac_if.if_flags & IFF_OACTIVE)
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return;
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sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
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/* The main loop. They warned me against endless loops, but
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* would I listen? NOOO....
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*/
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while(1) {
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/* Dequeue the next datagram */
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IF_DEQUEUE(&sc->arpcom.ac_if.if_snd,m0);
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/* If there's nothing to send, return. */
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if(m0 == NULL) {
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sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
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EL_UNLOCK(sc);
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return;
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}
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/* Disable the receiver */
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CSR_WRITE_1(sc,EL_AC,EL_AC_HOST);
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CSR_WRITE_1(sc,EL_RBC,0);
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/* Copy the datagram to the buffer. */
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len = 0;
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for(m = m0; m != NULL; m = m->m_next) {
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if(m->m_len == 0)
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continue;
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bcopy(mtod(m,caddr_t),sc->el_pktbuf+len,m->m_len);
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len += m->m_len;
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}
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m_freem(m0);
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len = max(len,ETHER_MIN_LEN);
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/* Give the packet to the bpf, if any */
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BPF_TAP(&sc->arpcom.ac_if, sc->el_pktbuf, len);
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/* Transfer datagram to board */
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dprintf(("el: xfr pkt length=%d...\n",len));
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i = EL_BUFSIZ - len;
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CSR_WRITE_1(sc,EL_GPBL,(i & 0xff));
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CSR_WRITE_1(sc,EL_GPBH,((i>>8)&0xff));
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bus_space_write_multi_1(sc->el_btag, sc->el_bhandle,
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EL_BUF, sc->el_pktbuf, len);
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/* Now transmit the datagram */
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retries=0;
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done=0;
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while(!done) {
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if(el_xmit(sc,len)) { /* Something went wrong */
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done = -1;
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break;
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}
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/* Check out status */
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i = CSR_READ_1(sc,EL_TXS);
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dprintf(("tx status=0x%x\n",i));
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if(!(i & EL_TXS_READY)) {
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dprintf(("el: err txs=%x\n",i));
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sc->arpcom.ac_if.if_oerrors++;
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if(i & (EL_TXS_COLL|EL_TXS_COLL16)) {
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if((!(i & EL_TXC_DCOLL16)) && retries < 15) {
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retries++;
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CSR_WRITE_1(sc,EL_AC,EL_AC_HOST);
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}
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}
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else
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done = 1;
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}
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else {
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sc->arpcom.ac_if.if_opackets++;
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done = 1;
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}
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}
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if(done == -1) /* Packet not transmitted */
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continue;
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/* Now give the card a chance to receive.
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* Gotta love 3c501s...
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*/
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(void)CSR_READ_1(sc,EL_AS);
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CSR_WRITE_1(sc,EL_AC,(EL_AC_IRQE|EL_AC_RX));
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EL_UNLOCK(sc);
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/* Interrupt here */
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EL_LOCK(sc);
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}
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}
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/* This function actually attempts to transmit a datagram downloaded
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* to the board. Call at splimp or interrupt, after downloading data!
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* Returns 0 on success, non-0 on failure
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*/
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static int
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el_xmit(struct el_softc *sc,int len)
|
|
{
|
|
int gpl;
|
|
int i;
|
|
|
|
gpl = EL_BUFSIZ - len;
|
|
dprintf(("el: xmit..."));
|
|
CSR_WRITE_1(sc,EL_GPBL,(gpl & 0xff));
|
|
CSR_WRITE_1(sc,EL_GPBH,((gpl>>8)&0xff));
|
|
CSR_WRITE_1(sc,EL_AC,EL_AC_TXFRX);
|
|
i = 20000;
|
|
while((CSR_READ_1(sc,EL_AS) & EL_AS_TXBUSY) && (i>0))
|
|
i--;
|
|
if(i == 0) {
|
|
dprintf(("tx not ready\n"));
|
|
sc->arpcom.ac_if.if_oerrors++;
|
|
return(-1);
|
|
}
|
|
dprintf(("%d cycles.\n",(20000-i)));
|
|
return(0);
|
|
}
|
|
|
|
/* Pass a packet up to the higher levels. */
|
|
static __inline void
|
|
elread(struct el_softc *sc,caddr_t buf,int len)
|
|
{
|
|
struct ifnet *ifp = &sc->arpcom.ac_if;
|
|
struct mbuf *m;
|
|
|
|
/*
|
|
* Put packet into an mbuf chain
|
|
*/
|
|
m = elget(buf,len,ifp);
|
|
if(m == 0)
|
|
return;
|
|
|
|
(*ifp->if_input)(ifp,m);
|
|
}
|
|
|
|
/* controller interrupt */
|
|
static void
|
|
elintr(void *xsc)
|
|
{
|
|
register struct el_softc *sc;
|
|
int stat, rxstat, len, done;
|
|
|
|
|
|
/* Get things pointing properly */
|
|
sc = xsc;
|
|
EL_LOCK(sc);
|
|
dprintf(("elintr: "));
|
|
|
|
/* Check board status */
|
|
stat = CSR_READ_1(sc,EL_AS);
|
|
if(stat & EL_AS_RXBUSY) {
|
|
(void)CSR_READ_1(sc,EL_RXC);
|
|
CSR_WRITE_1(sc,EL_AC,(EL_AC_IRQE|EL_AC_RX));
|
|
EL_UNLOCK(sc);
|
|
return;
|
|
}
|
|
|
|
done = 0;
|
|
while(!done) {
|
|
rxstat = CSR_READ_1(sc,EL_RXS);
|
|
if(rxstat & EL_RXS_STALE) {
|
|
(void)CSR_READ_1(sc,EL_RXC);
|
|
CSR_WRITE_1(sc,EL_AC,(EL_AC_IRQE|EL_AC_RX));
|
|
EL_UNLOCK(sc);
|
|
return;
|
|
}
|
|
|
|
/* If there's an overflow, reinit the board. */
|
|
if(!(rxstat & EL_RXS_NOFLOW)) {
|
|
dprintf(("overflow.\n"));
|
|
el_hardreset(sc);
|
|
/* Put board back into receive mode */
|
|
if(sc->arpcom.ac_if.if_flags & IFF_PROMISC)
|
|
CSR_WRITE_1(sc,EL_RXC,
|
|
(EL_RXC_PROMISC|EL_RXC_ABROAD|
|
|
EL_RXC_AMULTI|EL_RXC_AGF|EL_RXC_DSHORT|
|
|
EL_RXC_DDRIB|EL_RXC_DOFLOW));
|
|
else
|
|
CSR_WRITE_1(sc,EL_RXC,
|
|
(EL_RXC_ABROAD|
|
|
EL_RXC_AMULTI|EL_RXC_AGF|EL_RXC_DSHORT|
|
|
EL_RXC_DDRIB|EL_RXC_DOFLOW));
|
|
(void)CSR_READ_1(sc,EL_AS);
|
|
CSR_WRITE_1(sc,EL_RBC,0);
|
|
(void)CSR_READ_1(sc,EL_RXC);
|
|
CSR_WRITE_1(sc,EL_AC,(EL_AC_IRQE|EL_AC_RX));
|
|
EL_UNLOCK(sc);
|
|
return;
|
|
}
|
|
|
|
/* Incoming packet */
|
|
len = CSR_READ_1(sc,EL_RBL);
|
|
len |= CSR_READ_1(sc,EL_RBH) << 8;
|
|
dprintf(("receive len=%d rxstat=%x ",len,rxstat));
|
|
CSR_WRITE_1(sc,EL_AC,EL_AC_HOST);
|
|
|
|
/* If packet too short or too long, restore rx mode and return
|
|
*/
|
|
if((len <= sizeof(struct ether_header)) || (len > ETHER_MAX_LEN)) {
|
|
if(sc->arpcom.ac_if.if_flags & IFF_PROMISC)
|
|
CSR_WRITE_1(sc,EL_RXC,
|
|
(EL_RXC_PROMISC|EL_RXC_ABROAD|
|
|
EL_RXC_AMULTI|EL_RXC_AGF|EL_RXC_DSHORT|
|
|
EL_RXC_DDRIB|EL_RXC_DOFLOW));
|
|
else
|
|
CSR_WRITE_1(sc,EL_RXC,
|
|
(EL_RXC_ABROAD|
|
|
EL_RXC_AMULTI|EL_RXC_AGF|EL_RXC_DSHORT|
|
|
EL_RXC_DDRIB|EL_RXC_DOFLOW));
|
|
(void)CSR_READ_1(sc,EL_AS);
|
|
CSR_WRITE_1(sc,EL_RBC,0);
|
|
(void)CSR_READ_1(sc,EL_RXC);
|
|
CSR_WRITE_1(sc,EL_AC,(EL_AC_IRQE|EL_AC_RX));
|
|
EL_UNLOCK(sc);
|
|
return;
|
|
}
|
|
|
|
sc->arpcom.ac_if.if_ipackets++;
|
|
|
|
/* Copy the data into our buffer */
|
|
CSR_WRITE_1(sc,EL_GPBL,0);
|
|
CSR_WRITE_1(sc,EL_GPBH,0);
|
|
bus_space_read_multi_1(sc->el_btag, sc->el_bhandle,
|
|
EL_BUF, sc->el_pktbuf, len);
|
|
CSR_WRITE_1(sc,EL_RBC,0);
|
|
CSR_WRITE_1(sc,EL_AC,EL_AC_RX);
|
|
dprintf(("%6D-->",sc->el_pktbuf+6,":"));
|
|
dprintf(("%6D\n",sc->el_pktbuf,":"));
|
|
|
|
/* Pass data up to upper levels */
|
|
elread(sc,(caddr_t)(sc->el_pktbuf),len);
|
|
|
|
/* Is there another packet? */
|
|
stat = CSR_READ_1(sc,EL_AS);
|
|
|
|
/* If so, do it all again (i.e. don't set done to 1) */
|
|
if(!(stat & EL_AS_RXBUSY))
|
|
dprintf(("<rescan> "));
|
|
else
|
|
done = 1;
|
|
}
|
|
|
|
(void)CSR_READ_1(sc,EL_RXC);
|
|
CSR_WRITE_1(sc,EL_AC,(EL_AC_IRQE|EL_AC_RX));
|
|
EL_UNLOCK(sc);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Pull read data off an interface.
|
|
* Len is length of data, with local net header stripped.
|
|
*/
|
|
static struct mbuf *
|
|
elget(buf, totlen, ifp)
|
|
caddr_t buf;
|
|
int totlen;
|
|
struct ifnet *ifp;
|
|
{
|
|
struct mbuf *top, **mp, *m;
|
|
int len;
|
|
register caddr_t cp;
|
|
char *epkt;
|
|
|
|
buf += sizeof(struct ether_header);
|
|
cp = buf;
|
|
epkt = cp + totlen;
|
|
|
|
MGETHDR(m, M_DONTWAIT, MT_DATA);
|
|
if (m == 0)
|
|
return (0);
|
|
m->m_pkthdr.rcvif = ifp;
|
|
m->m_pkthdr.len = totlen;
|
|
m->m_len = MHLEN;
|
|
top = 0;
|
|
mp = ⊤
|
|
while (totlen > 0) {
|
|
if (top) {
|
|
MGET(m, M_DONTWAIT, MT_DATA);
|
|
if (m == 0) {
|
|
m_freem(top);
|
|
return (0);
|
|
}
|
|
m->m_len = MLEN;
|
|
}
|
|
len = min(totlen, epkt - cp);
|
|
if (len >= MINCLSIZE) {
|
|
MCLGET(m, M_DONTWAIT);
|
|
if (m->m_flags & M_EXT)
|
|
m->m_len = len = min(len, MCLBYTES);
|
|
else
|
|
len = m->m_len;
|
|
} else {
|
|
/*
|
|
* Place initial small packet/header at end of mbuf.
|
|
*/
|
|
if (len < m->m_len) {
|
|
if (top == 0 && len + max_linkhdr <= m->m_len)
|
|
m->m_data += max_linkhdr;
|
|
m->m_len = len;
|
|
} else
|
|
len = m->m_len;
|
|
}
|
|
bcopy(cp, mtod(m, caddr_t), (unsigned)len);
|
|
cp += len;
|
|
*mp = m;
|
|
mp = &m->m_next;
|
|
totlen -= len;
|
|
if (cp == epkt)
|
|
cp = buf;
|
|
}
|
|
return (top);
|
|
}
|
|
|
|
/*
|
|
* Process an ioctl request. This code needs some work - it looks
|
|
* pretty ugly.
|
|
*/
|
|
static int
|
|
el_ioctl(ifp, command, data)
|
|
register struct ifnet *ifp;
|
|
u_long command;
|
|
caddr_t data;
|
|
{
|
|
int error = 0;
|
|
struct el_softc *sc;
|
|
|
|
sc = ifp->if_softc;
|
|
EL_LOCK(sc);
|
|
|
|
switch (command) {
|
|
case SIOCSIFFLAGS:
|
|
/*
|
|
* If interface is marked down and it is running, then stop it
|
|
*/
|
|
if (((ifp->if_flags & IFF_UP) == 0) &&
|
|
(ifp->if_flags & IFF_RUNNING)) {
|
|
el_stop(ifp->if_softc);
|
|
ifp->if_flags &= ~IFF_RUNNING;
|
|
} else {
|
|
/*
|
|
* If interface is marked up and it is stopped, then start it
|
|
*/
|
|
if ((ifp->if_flags & IFF_UP) &&
|
|
((ifp->if_flags & IFF_RUNNING) == 0))
|
|
el_init(ifp->if_softc);
|
|
}
|
|
break;
|
|
default:
|
|
error = ether_ioctl(ifp, command, data);
|
|
break;
|
|
}
|
|
EL_UNLOCK(sc);
|
|
return (error);
|
|
}
|
|
|
|
/* Device timeout routine */
|
|
static void
|
|
el_watchdog(struct ifnet *ifp)
|
|
{
|
|
log(LOG_ERR,"el%d: device timeout\n", ifp->if_unit);
|
|
ifp->if_oerrors++;
|
|
el_reset(ifp->if_softc);
|
|
}
|