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/* $NetBSD: smc90cx6.c,v 1.38 2001/07/07 15:57:53 thorpej Exp $ */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/cm/smc90cx6.c 207554 2010-05-03 07:32:50Z sobomax $");
/*-
* Copyright (c) 1994, 1995, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Ignatios Souvatzis.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Chip core driver for the SMC90c26 / SMC90c56 (and SMC90c66 in '56
* compatibility mode) boards
*/
/* #define CMSOFTCOPY */
#define CMRETRANSMIT /**/
/* #define CM_DEBUG */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/if_arc.h>
#include <dev/cm/smc90cx6reg.h>
#include <dev/cm/smc90cx6var.h>
MODULE_DEPEND(if_cm, arcnet, 1, 1, 1);
/* these should be elsewhere */
#define ARC_MIN_LEN 1
#define ARC_MIN_FORBID_LEN 254
#define ARC_MAX_FORBID_LEN 256
#define ARC_MAX_LEN 508
#define ARC_ADDR_LEN 1
/* for watchdog timer. This should be more than enough. */
#define ARCTIMEOUT (5*IFNET_SLOWHZ)
devclass_t cm_devclass;
/*
* This currently uses 2 bufs for tx, 2 for rx
*
* New rx protocol:
*
* rx has a fillcount variable. If fillcount > (NRXBUF-1),
* rx can be switched off from rx hard int.
* Else rx is restarted on the other receiver.
* rx soft int counts down. if it is == (NRXBUF-1), it restarts
* the receiver.
* To ensure packet ordering (we need that for 1201 later), we have a counter
* which is incremented modulo 256 on each receive and a per buffer
* variable, which is set to the counter on filling. The soft int can
* compare both values to determine the older packet.
*
* Transmit direction:
*
* cm_start checks tx_fillcount
* case 2: return
*
* else fill tx_act ^ 1 && inc tx_fillcount
*
* check tx_fillcount again.
* case 2: set IFF_DRV_OACTIVE to stop arc_output from filling us.
* case 1: start tx
*
* tint clears IFF_OACTIVE, decrements and checks tx_fillcount
* case 1: start tx on tx_act ^ 1, softcall cm_start
* case 0: softcall cm_start
*
* #define fill(i) get mbuf && copy mbuf to chip(i)
*/
void cm_init(void *);
static void cm_init_locked(struct cm_softc *);
static void cm_reset_locked(struct cm_softc *);
void cm_start(struct ifnet *);
void cm_start_locked(struct ifnet *);
int cm_ioctl(struct ifnet *, unsigned long, caddr_t);
void cm_watchdog(void *);
void cm_srint_locked(void *vsc);
static void cm_tint_locked(struct cm_softc *, int);
void cm_reconwatch_locked(void *);
/*
* Release all resources
*/
void
cm_release_resources(dev)
device_t dev;
{
struct cm_softc *sc = device_get_softc(dev);
if (sc->port_res != NULL) {
bus_release_resource(dev, SYS_RES_IOPORT,
0, sc->port_res);
sc->port_res = NULL;
}
if (sc->mem_res != NULL) {
bus_release_resource(dev, SYS_RES_MEMORY,
0, sc->mem_res);
sc->mem_res = NULL;
}
if (sc->irq_res != NULL) {
bus_release_resource(dev, SYS_RES_IRQ,
0, sc->irq_res);
sc->irq_res = NULL;
}
}
int
cm_attach(dev)
device_t dev;
{
struct cm_softc *sc = device_get_softc(dev);
struct ifnet *ifp;
u_int8_t linkaddress;
ifp = sc->sc_ifp = if_alloc(IFT_ARCNET);
if (ifp == NULL)
return (ENOSPC);
/*
* read the arcnet address from the board
*/
GETREG(CMRESET);
do {
DELAY(200);
} while (!(GETREG(CMSTAT) & CM_POR));
linkaddress = GETMEM(CMMACOFF);
/* clear the int mask... */
sc->sc_intmask = 0;
PUTREG(CMSTAT, 0);
PUTREG(CMCMD, CM_CONF(CONF_LONG));
PUTREG(CMCMD, CM_CLR(CLR_POR|CLR_RECONFIG));
sc->sc_recontime = sc->sc_reconcount = 0;
/*
* set interface to stopped condition (reset)
*/
cm_stop_locked(sc);
ifp->if_softc = sc;
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
ifp->if_output = arc_output;
ifp->if_start = cm_start;
ifp->if_ioctl = cm_ioctl;
ifp->if_init = cm_init;
/* XXX IFQ_SET_READY(&ifp->if_snd); */
ifp->if_snd.ifq_maxlen = ifqmaxlen;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX;
arc_ifattach(ifp, linkaddress);
#ifdef CMSOFTCOPY
sc->sc_rxcookie = softintr_establish(IPL_SOFTNET, cm_srint, sc);
sc->sc_txcookie = softintr_establish(IPL_SOFTNET,
(void (*)(void *))cm_start, ifp);
#endif
callout_init_mtx(&sc->sc_recon_ch, &sc->sc_mtx, 0);
callout_init_mtx(&sc->sc_watchdog_timer, &sc->sc_mtx, 0);
if_printf(ifp, "link addr 0x%02x (%d)\n", linkaddress, linkaddress);
return 0;
}
/*
* Initialize device
*
*/
void
cm_init(xsc)
void *xsc;
{
struct cm_softc *sc = (struct cm_softc *)xsc;
CM_LOCK(sc);
cm_init_locked(sc);
CM_UNLOCK(sc);
}
static void
cm_init_locked(struct cm_softc *sc)
{
struct ifnet *ifp = sc->sc_ifp;
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
ifp->if_drv_flags |= IFF_DRV_RUNNING;
cm_reset_locked(sc);
}
}
/*
* Reset the interface...
*
* Assumes that it is called with sc_mtx held
*/
void
cm_reset_locked(sc)
struct cm_softc *sc;
{
struct ifnet *ifp;
int linkaddress;
ifp = sc->sc_ifp;
#ifdef CM_DEBUG
if_printf(ifp, "reset\n");
#endif
/* stop and restart hardware */
GETREG(CMRESET);
do {
DELAY(200);
} while (!(GETREG(CMSTAT) & CM_POR));
linkaddress = GETMEM(CMMACOFF);
#if defined(CM_DEBUG) && (CM_DEBUG > 2)
if_printf(ifp, "reset: card reset, link addr = 0x%02x (%d)\n",
linkaddress, linkaddress);
#endif
/* tell the routing level about the (possibly changed) link address */
arc_storelladdr(ifp, linkaddress);
arc_frag_init(ifp);
/* POR is NMI, but we need it below: */
sc->sc_intmask = CM_RECON|CM_POR;
PUTREG(CMSTAT, sc->sc_intmask);
PUTREG(CMCMD, CM_CONF(CONF_LONG));
#ifdef CM_DEBUG
if_printf(ifp, "reset: chip configured, status=0x%02x\n",
GETREG(CMSTAT));
#endif
PUTREG(CMCMD, CM_CLR(CLR_POR|CLR_RECONFIG));
#ifdef CM_DEBUG
if_printf(ifp, "reset: bits cleared, status=0x%02x\n",
GETREG(CMSTAT));
#endif
sc->sc_reconcount_excessive = ARC_EXCESSIVE_RECONS;
/* start receiver */
sc->sc_intmask |= CM_RI;
sc->sc_rx_fillcount = 0;
sc->sc_rx_act = 2;
PUTREG(CMCMD, CM_RXBC(2));
PUTREG(CMSTAT, sc->sc_intmask);
#ifdef CM_DEBUG
if_printf(ifp, "reset: started receiver, status=0x%02x\n",
GETREG(CMSTAT));
#endif
/* and init transmitter status */
sc->sc_tx_act = 0;
sc->sc_tx_fillcount = 0;
ifp->if_drv_flags |= IFF_DRV_RUNNING;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
callout_reset(&sc->sc_watchdog_timer, hz, cm_watchdog, sc);
cm_start_locked(ifp);
}
/*
* Take interface offline
*/
void
cm_stop_locked(sc)
struct cm_softc *sc;
{
/* Stop the interrupts */
PUTREG(CMSTAT, 0);
/* Stop the interface */
GETREG(CMRESET);
/* Stop watchdog timer */
callout_stop(&sc->sc_watchdog_timer);
sc->sc_timer = 0;
}
void
cm_start(struct ifnet *ifp)
{
struct cm_softc *sc = ifp->if_softc;
CM_LOCK(sc);
cm_start_locked(ifp);
CM_UNLOCK(sc);
}
/*
* Start output on interface. Get another datagram to send
* off the interface queue, and copy it to the
* interface becore starting the output
*
* Assumes that sc_mtx is held
*/
void
cm_start_locked(ifp)
struct ifnet *ifp;
{
struct cm_softc *sc = ifp->if_softc;
struct mbuf *m, *mp;
int cm_ram_ptr;
int len, tlen, offset, buffer;
#ifdef CMTIMINGS
u_long copystart, lencopy, perbyte;
#endif
#if defined(CM_DEBUG) && (CM_DEBUG > 3)
if_printf(ifp, "start(%p)\n", ifp);
#endif
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
return;
if (sc->sc_tx_fillcount >= 2)
return;
m = arc_frag_next(ifp);
buffer = sc->sc_tx_act ^ 1;
if (m == 0)
return;
#ifdef CM_DEBUG
if (m->m_len < ARC_HDRLEN)
m = m_pullup(m, ARC_HDRLEN);/* gcc does structure padding */
if_printf(ifp, "start: filling %d from %d to %d type %d\n",
buffer, mtod(m, u_char *)[0],
mtod(m, u_char *)[1], mtod(m, u_char *)[2]);
#else
if (m->m_len < 2)
m = m_pullup(m, 2);
#endif
cm_ram_ptr = buffer * 512;
if (m == 0)
return;
/* write the addresses to RAM and throw them away */
/*
* Hardware does this: Yet Another Microsecond Saved.
* (btw, timing code says usually 2 microseconds)
* PUTMEM(cm_ram_ptr + 0, mtod(m, u_char *)[0]);
*/
PUTMEM(cm_ram_ptr + 1, mtod(m, u_char *)[1]);
m_adj(m, 2);
/* get total length left at this point */
tlen = m->m_pkthdr.len;
if (tlen < ARC_MIN_FORBID_LEN) {
offset = 256 - tlen;
PUTMEM(cm_ram_ptr + 2, offset);
} else {
PUTMEM(cm_ram_ptr + 2, 0);
if (tlen <= ARC_MAX_FORBID_LEN)
offset = 255; /* !!! */
else {
if (tlen > ARC_MAX_LEN)
tlen = ARC_MAX_LEN;
offset = 512 - tlen;
}
PUTMEM(cm_ram_ptr + 3, offset);
}
cm_ram_ptr += offset;
/* lets loop through the mbuf chain */
for (mp = m; mp; mp = mp->m_next) {
if ((len = mp->m_len)) { /* YAMS */
bus_space_write_region_1(
rman_get_bustag(sc->mem_res),
rman_get_bushandle(sc->mem_res),
cm_ram_ptr, mtod(mp, caddr_t), len);
cm_ram_ptr += len;
}
}
sc->sc_broadcast[buffer] = (m->m_flags & M_BCAST) != 0;
sc->sc_retransmits[buffer] = (m->m_flags & M_BCAST) ? 1 : 5;
if (++sc->sc_tx_fillcount > 1) {
/*
* We are filled up to the rim. No more bufs for the moment,
* please.
*/
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
} else {
#ifdef CM_DEBUG
if_printf(ifp, "start: starting transmitter on buffer %d\n",
buffer);
#endif
/* Transmitter was off, start it */
sc->sc_tx_act = buffer;
/*
* We still can accept another buf, so don't:
* ifp->if_drv_flags |= IFF_DRV_OACTIVE;
*/
sc->sc_intmask |= CM_TA;
PUTREG(CMCMD, CM_TX(buffer));
PUTREG(CMSTAT, sc->sc_intmask);
sc->sc_timer = ARCTIMEOUT;
}
m_freem(m);
/*
* After 10 times reading the docs, I realized
* that in the case the receiver NAKs the buffer request,
* the hardware retries till shutdown.
* This is integrated now in the code above.
*/
}
#ifdef CMSOFTCOPY
void
cm_srint(void *vsc)
{
struct cm_softc *sc = (struct cm_softc *)vsc;
CM_LOCK(sc);
cm_srint_locked(vsc);
CM_UNLOCK(sc);
}
#endif
/*
* Arcnet interface receiver soft interrupt:
* get the stuff out of any filled buffer we find.
*/
void
cm_srint_locked(vsc)
void *vsc;
{
struct cm_softc *sc = (struct cm_softc *)vsc;
int buffer, len, offset, type;
int cm_ram_ptr;
struct mbuf *m;
struct arc_header *ah;
struct ifnet *ifp;
ifp = sc->sc_ifp;
buffer = sc->sc_rx_act ^ 1;
/* Allocate header mbuf */
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == 0) {
/*
* in case s.th. goes wrong with mem, drop it
* to make sure the receiver can be started again
* count it as input error (we dont have any other
* detectable)
*/
ifp->if_ierrors++;
goto cleanup;
}
m->m_pkthdr.rcvif = ifp;
/*
* Align so that IP packet will be longword aligned. Here we
* assume that m_data of new packet is longword aligned.
* When implementing PHDS, we might have to change it to 2,
* (2*sizeof(ulong) - CM_HDRNEWLEN)), packet type dependent.
*/
cm_ram_ptr = buffer * 512;
offset = GETMEM(cm_ram_ptr + 2);
if (offset)
len = 256 - offset;
else {
offset = GETMEM(cm_ram_ptr + 3);
len = 512 - offset;
}
/*
* first +2 bytes for align fixup below
* second +2 bytes are for src/dst addresses
*/
if ((len + 2 + 2) > MHLEN) {
/* attach an mbuf cluster */
MCLGET(m, M_DONTWAIT);
/* Insist on getting a cluster */
if ((m->m_flags & M_EXT) == 0) {
ifp->if_ierrors++;
goto cleanup;
}
}
if (m == 0) {
ifp->if_ierrors++;
goto cleanup;
}
type = GETMEM(cm_ram_ptr + offset);
m->m_data += 1 + arc_isphds(type);
/* mbuf filled with ARCnet addresses */
m->m_pkthdr.len = m->m_len = len + 2;
ah = mtod(m, struct arc_header *);
ah->arc_shost = GETMEM(cm_ram_ptr + 0);
ah->arc_dhost = GETMEM(cm_ram_ptr + 1);
bus_space_read_region_1(
rman_get_bustag(sc->mem_res), rman_get_bushandle(sc->mem_res),
cm_ram_ptr + offset, mtod(m, u_char *) + 2, len);
CM_UNLOCK(sc);
arc_input(ifp, m);
CM_LOCK(sc);
m = NULL;
ifp->if_ipackets++;
cleanup:
if (m != NULL)
m_freem(m);
/* mark buffer as invalid by source id 0 */
PUTMEM(buffer << 9, 0);
if (--sc->sc_rx_fillcount == 2 - 1) {
/* was off, restart it on buffer just emptied */
sc->sc_rx_act = buffer;
sc->sc_intmask |= CM_RI;
/* this also clears the RI flag interrupt: */
PUTREG(CMCMD, CM_RXBC(buffer));
PUTREG(CMSTAT, sc->sc_intmask);
#ifdef CM_DEBUG
if_printf(ifp, "srint: restarted rx on buf %d\n", buffer);
#endif
}
}
__inline static void
cm_tint_locked(sc, isr)
struct cm_softc *sc;
int isr;
{
struct ifnet *ifp;
int buffer;
#ifdef CMTIMINGS
int clknow;
#endif
ifp = sc->sc_ifp;
buffer = sc->sc_tx_act;
/*
* retransmit code:
* Normal situtations first for fast path:
* If acknowledgement received ok or broadcast, we're ok.
* else if
*/
if (isr & CM_TMA || sc->sc_broadcast[buffer])
ifp->if_opackets++;
#ifdef CMRETRANSMIT
else if (ifp->if_flags & IFF_LINK2 && sc->sc_timer > 0
&& --sc->sc_retransmits[buffer] > 0) {
/* retransmit same buffer */
PUTREG(CMCMD, CM_TX(buffer));
return;
}
#endif
else
ifp->if_oerrors++;
/* We know we can accept another buffer at this point. */
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
if (--sc->sc_tx_fillcount > 0) {
/*
* start tx on other buffer.
* This also clears the int flag
*/
buffer ^= 1;
sc->sc_tx_act = buffer;
/*
* already given:
* sc->sc_intmask |= CM_TA;
* PUTREG(CMSTAT, sc->sc_intmask);
*/
PUTREG(CMCMD, CM_TX(buffer));
/* init watchdog timer */
sc->sc_timer = ARCTIMEOUT;
#if defined(CM_DEBUG) && (CM_DEBUG > 1)
if_printf(ifp,
"tint: starting tx on buffer %d, status 0x%02x\n",
buffer, GETREG(CMSTAT));
#endif
} else {
/* have to disable TX interrupt */
sc->sc_intmask &= ~CM_TA;
PUTREG(CMSTAT, sc->sc_intmask);
/* ... and watchdog timer */
sc->sc_timer = 0;
#ifdef CM_DEBUG
if_printf(ifp, "tint: no more buffers to send, status 0x%02x\n",
GETREG(CMSTAT));
#endif
}
/* XXXX TODO */
#ifdef CMSOFTCOPY
/* schedule soft int to fill a new buffer for us */
softintr_schedule(sc->sc_txcookie);
#else
/* call it directly */
cm_start_locked(ifp);
#endif
}
/*
* Our interrupt routine
*/
void
cmintr(arg)
void *arg;
{
struct cm_softc *sc = arg;
struct ifnet *ifp = sc->sc_ifp;
u_char isr, maskedisr;
int buffer;
u_long newsec;
CM_LOCK(sc);
isr = GETREG(CMSTAT);
maskedisr = isr & sc->sc_intmask;
if (!maskedisr || (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
CM_UNLOCK(sc);
return;
}
do {
#if defined(CM_DEBUG) && (CM_DEBUG > 1)
if_printf(ifp, "intr: status 0x%02x, intmask 0x%02x\n",
isr, sc->sc_intmask);
#endif
if (maskedisr & CM_POR) {
/*
* XXX We should never see this. Don't bother to store
* the address.
* sc->sc_ifp->if_l2com->ac_anaddr = GETMEM(CMMACOFF);
*/
PUTREG(CMCMD, CM_CLR(CLR_POR));
log(LOG_WARNING,
"%s: intr: got spurious power on reset int\n",
ifp->if_xname);
}
if (maskedisr & CM_RECON) {
/*
* we dont need to:
* PUTREG(CMCMD, CM_CONF(CONF_LONG));
*/
PUTREG(CMCMD, CM_CLR(CLR_RECONFIG));
ifp->if_collisions++;
/*
* If less than 2 seconds per reconfig:
* If ARC_EXCESSIVE_RECONFIGS
* since last burst, complain and set treshold for
* warnings to ARC_EXCESSIVE_RECONS_REWARN.
*
* This allows for, e.g., new stations on the cable, or
* cable switching as long as it is over after
* (normally) 16 seconds.
*
* XXX TODO: check timeout bits in status word and
* double time if necessary.
*/
callout_stop(&sc->sc_recon_ch);
newsec = time_second;
if ((newsec - sc->sc_recontime <= 2) &&
(++sc->sc_reconcount == ARC_EXCESSIVE_RECONS)) {
log(LOG_WARNING,
"%s: excessive token losses, "
"cable problem?\n",
ifp->if_xname);
}
sc->sc_recontime = newsec;
callout_reset(&sc->sc_recon_ch, 15 * hz,
cm_reconwatch_locked, (void *)sc);
}
if (maskedisr & CM_RI) {
#if defined(CM_DEBUG) && (CM_DEBUG > 1)
if_printf(ifp, "intr: hard rint, act %d\n",
sc->sc_rx_act);
#endif
buffer = sc->sc_rx_act;
/* look if buffer is marked invalid: */
if (GETMEM(buffer * 512) == 0) {
/*
* invalid marked buffer (or illegally
* configured sender)
*/
log(LOG_WARNING,
"%s: spurious RX interrupt or sender 0 "
" (ignored)\n", ifp->if_xname);
/*
* restart receiver on same buffer.
* XXX maybe better reset interface?
*/
PUTREG(CMCMD, CM_RXBC(buffer));
} else {
if (++sc->sc_rx_fillcount > 1) {
sc->sc_intmask &= ~CM_RI;
PUTREG(CMSTAT, sc->sc_intmask);
} else {
buffer ^= 1;
sc->sc_rx_act = buffer;
/*
* Start receiver on other receive
* buffer. This also clears the RI
* interrupt flag.
*/
PUTREG(CMCMD, CM_RXBC(buffer));
/* in RX intr, so mask is ok for RX */
#ifdef CM_DEBUG
if_printf(ifp, "strt rx for buf %d, "
"stat 0x%02x\n",
sc->sc_rx_act, GETREG(CMSTAT));
#endif
}
#ifdef CMSOFTCOPY
/*
* this one starts a soft int to copy out
* of the hw
*/
softintr_schedule(sc->sc_rxcookie);
#else
/* this one does the copy here */
cm_srint_locked(sc);
#endif
}
}
if (maskedisr & CM_TA) {
cm_tint_locked(sc, isr);
}
isr = GETREG(CMSTAT);
maskedisr = isr & sc->sc_intmask;
} while (maskedisr);
#if defined(CM_DEBUG) && (CM_DEBUG > 1)
if_printf(ifp, "intr (exit): status 0x%02x, intmask 0x%02x\n",
isr, sc->sc_intmask);
#endif
CM_UNLOCK(sc);
}
void
cm_reconwatch_locked(arg)
void *arg;
{
struct cm_softc *sc = arg;
struct ifnet *ifp = sc->sc_ifp;
if (sc->sc_reconcount >= ARC_EXCESSIVE_RECONS) {
sc->sc_reconcount = 0;
log(LOG_WARNING, "%s: token valid again.\n",
ifp->if_xname);
}
sc->sc_reconcount = 0;
}
/*
* Process an ioctl request.
* This code needs some work - it looks pretty ugly.
*/
int
cm_ioctl(ifp, command, data)
struct ifnet *ifp;
u_long command;
caddr_t data;
{
struct cm_softc *sc;
int error;
error = 0;
sc = ifp->if_softc;
#if defined(CM_DEBUG) && (CM_DEBUG > 2)
if_printf(ifp, "ioctl() called, cmd = 0x%lx\n", command);
#endif
switch (command) {
case SIOCSIFADDR:
case SIOCGIFADDR:
case SIOCADDMULTI:
case SIOCDELMULTI:
case SIOCSIFMTU:
error = arc_ioctl(ifp, command, data);
break;
case SIOCSIFFLAGS:
CM_LOCK(sc);
if ((ifp->if_flags & IFF_UP) == 0 &&
(ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) {
/*
* If interface is marked down and it is running,
* then stop it.
*/
cm_stop_locked(sc);
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
} else if ((ifp->if_flags & IFF_UP) != 0 &&
(ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
/*
* If interface is marked up and it is stopped, then
* start it.
*/
cm_init_locked(sc);
}
CM_UNLOCK(sc);
break;
default:
error = EINVAL;
break;
}
return (error);
}
/*
* watchdog routine for transmitter.
*
* We need this, because else a receiver whose hardware is alive, but whose
* software has not enabled the Receiver, would make our hardware wait forever
* Discovered this after 20 times reading the docs.
*
* Only thing we do is disable transmitter. We'll get a transmit timeout,
* and the int handler will have to decide not to retransmit (in case
* retransmission is implemented).
*/
void
cm_watchdog(void *arg)
{
struct cm_softc *sc;
sc = arg;
callout_reset(&sc->sc_watchdog_timer, hz, cm_watchdog, sc);
if (sc->sc_timer == 0 || --sc->sc_timer > 0)
return;
PUTREG(CMCMD, CM_TXDIS);
}