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75d63045d9
freebsd/sys/dev/arl/if_arl.c
John Baldwin 0dea849ae9 Various bpf(4) related fixes to catch places up to the new bpf(4) 
semantics.
- Stop testing bpf pointers for NULL.  In some cases use
  bpf_peers_present() and then call the function directly inside the
  conditional block instead of the macro.
- For places where the entire conditional block is the macro, remove the
  test and make the macro unconditional.
- Use BPF_MTAP() in if_pfsync on FreeBSD instead of an expanded version of
  the old semantics.

Reviewed by:	csjp (older version)
2006-12-29 13:59:50 +00:00

1281 lines
27 KiB
C
Raw Blame History

/*-
* Copyright (c) 1999-2001, Ivan Sharov, Vitaly Belekhov.
* Copyright (c) 2004 Stanislav Svirid.
* 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 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 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.
*
* $RISS: if_arl/dev/arl/if_arl.c,v 1.7 2004/03/16 04:43:27 count Exp $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_inet.h"
#ifdef INET
#define ARLCACHE
#endif
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/ethernet.h>
#include <net80211/ieee80211_var.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#endif
#include <net/bpf.h>
#include <dev/arl/if_arlreg.h>
/*#define DEBUG */
#ifdef DEBUG
#define D(x) {printf("arl%d: ", sc->arl_unit); printf x; }
#else
#define D(x)
#endif
/*
* channel attention
*/
#define ARL_CHANNEL(sc) \
{ \
D(("channel ctrl %x reg %x\n", sc->arl_control, ar->controlRegister)); \
ar->controlRegister = (sc->arl_control ^= ARL_CHANNEL_ATTENTION); \
}
/*
* Check registration
*/
#define ARL_CHECKREG(sc) (ar->registrationMode && ar->registrationStatus == 0)
#define GET_ARL_PARAM(name) (arcfg.name = ar->name)
#define SET_ARL_PARAM(name) (ar->name = arcfg.name)
#ifndef BPF_MTAP
#define BPF_MTAP(_ifp,_m) \
do { \
if ((_ifp)->if_bpf) \
bpf_mtap((_ifp), (_m)); \
} while (0)
#endif
#if __FreeBSD_version < 500100
#define BROADCASTADDR (etherbroadcastaddr)
#define _ARL_CURPROC (curproc)
#else
#define BROADCASTADDR (sc->arl_ifp->if_broadcastaddr)
#define _ARL_CURPROC (curthread)
#endif
static void arl_hwreset (struct arl_softc *);
static void arl_reset (struct arl_softc *);
static int arl_ioctl (struct ifnet *, u_long, caddr_t);
static void arl_init (void *);
static void arl_start (struct ifnet *);
static void arl_watchdog (struct ifnet *);
static void arl_waitreg (struct ifnet *);
static void arl_enable (struct arl_softc *);
static void arl_config (struct arl_softc *);
static int arl_command (struct arl_softc *);
static void arl_put (struct arl_softc *);
static void arl_read (struct arl_softc *, caddr_t, int);
static void arl_recv (struct arl_softc *);
static struct mbuf* arl_get (caddr_t, int, int, struct ifnet *);
#ifdef ARLCACHE
static void arl_cache_store (struct arl_softc *, struct ether_header *,
u_int8_t, u_int8_t, int);
#endif
static int arl_media_change (struct ifnet *);
static void arl_media_status (struct ifnet *, struct ifmediareq *);
static void arl_read_config (struct arl_softc *);
devclass_t arl_devclass;
u_int8_t rate2media[4] = {
IFM_IEEE80211_DS354k,
IFM_IEEE80211_DS512k,
IFM_IEEE80211_DS1,
IFM_IEEE80211_DS2
};
/*
* Copy config values to local cache
*/
static void
arl_read_config(sc)
struct arl_softc *sc;
{
bzero(&arcfg, sizeof(arcfg));
bcopy(ar->lanCardNodeId, arcfg.lanCardNodeId,
sizeof(ar->lanCardNodeId));
bcopy(ar->specifiedRouter, arcfg.specifiedRouter,
sizeof(ar->specifiedRouter));
GET_ARL_PARAM(hardwareType);
GET_ARL_PARAM(majorHardwareVersion);
GET_ARL_PARAM(minorHardwareVersion);
GET_ARL_PARAM(radioModule);
GET_ARL_PARAM(channelSet);
if (!arcfg.channelSet)
arcfg.channelSet = ar->defaultChannelSet;
GET_ARL_PARAM(channelNumber);
GET_ARL_PARAM(spreadingCode);
GET_ARL_PARAM(priority);
GET_ARL_PARAM(receiveMode);
arcfg.registrationMode = 1; /* set default TMA mode */
arcfg.txRetry = 0;
bcopy(ar->name, arcfg.name, ARLAN_NAME_SIZE);
bcopy(ar->systemId, arcfg.sid, 4 * sizeof(arcfg.sid[0]));
}
/*
* Attach device
*/
int
arl_attach(dev)
device_t dev;
{
struct arl_softc* sc = device_get_softc(dev);
struct ifnet *ifp;
int attached, configured = 0;
D(("attach\n"));
ifp = sc->arl_ifp = if_alloc(IFT_ETHER);
if (ifp == NULL)
return (ENOSPC);
configured = ar->configuredStatusFlag;
attached = (ifp->if_softc != 0);
if (!configured && bootverbose)
device_printf(dev, "card is not configured\n");
else
arl_read_config(sc);
arl_reset(sc);
/* Read config for default values if card was not configured */
if (!configured)
arl_read_config(sc);
/* Initialize ifnet structure. */
ifp->if_softc = sc;
#if __FreeBSD_version < 502000
ifp->if_unit = sc->arl_unit;
ifp->if_name = "arl";
#else
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
#endif
ifp->if_mtu = ETHERMTU;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST |
IFF_NEEDSGIANT;
ifp->if_start = arl_start;
ifp->if_ioctl = arl_ioctl;
ifp->if_watchdog = arl_watchdog;
ifp->if_init = arl_init;
ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
ifp->if_baudrate = 2000000;
ifp->if_timer = 0;
ifmedia_init(&sc->arl_ifmedia, 0, arl_media_change, arl_media_status);
#define ADD(s, o) ifmedia_add(&sc->arl_ifmedia, \
IFM_MAKEWORD(IFM_IEEE80211, (s), (o), 0), 0, NULL)
ADD(IFM_IEEE80211_DS354k, 0);
ADD(IFM_IEEE80211_DS354k, IFM_IEEE80211_ADHOC);
ADD(IFM_IEEE80211_DS512k, 0);
ADD(IFM_IEEE80211_DS512k, IFM_IEEE80211_ADHOC);
ADD(IFM_IEEE80211_DS1, 0);
ADD(IFM_IEEE80211_DS1, IFM_IEEE80211_ADHOC);
ADD(IFM_IEEE80211_DS2, 0);
ADD(IFM_IEEE80211_DS2, IFM_IEEE80211_ADHOC);
ifmedia_set(&sc->arl_ifmedia, IFM_MAKEWORD(IFM_IEEE80211,
rate2media[arcfg.spreadingCode - 1], 0, 0));
#undef ADD
/*
* Attach the interface
*/
if (!attached) {
#if __FreeBSD_version < 500100
ether_ifattach(ifp, ETHER_BPF_SUPPORTED);
#else
ether_ifattach(ifp, ar->lanCardNodeId);
#endif
}
return (0);
}
/*
* Hardware reset
* reset all setting to default (setted ARLANDGS)
*/
static void
arl_hwreset(sc)
struct arl_softc *sc;
{
D(("hw reset\n"));
ar->controlRegister = 1;
DELAY(ARDELAY1);
if (arl_wait_reset(sc, 0x24, ARDELAY1))
arl_stop(sc);
ar->controlRegister = (sc->arl_control = 1);
DELAY(ARDELAY1);
}
/*
* wait arlan command
*/
static int
arl_command(sc)
struct arl_softc *sc;
{
int i; /* long stuppid delay ??? */
D(("commandByte %x\n", ar->commandByte));
for (i = 100000; ar->commandByte && i; i--)
;
if (i == 0)
ar->commandByte = 0;
return (i == 0);
}
/*
* Enable for recieveng
*/
static void
arl_enable(sc)
struct arl_softc *sc;
{
D(("enable\n"));
sc->arl_control = (ARL_INTERRUPT_ENABLE | ARL_CLEAR_INTERRUPT);
ar->controlRegister = sc->arl_control;
arl_command(sc);
ar->rxStatusVector = 0;
ar->commandByte = 0x83;
ar->commandParameter[0] = 1;
ARL_CHANNEL(sc);
arl_command(sc);
}
/*
* reset and set user parameters
*/
static void
arl_reset(sc)
struct arl_softc *sc;
{
D(("reset\n"));
arl_hwreset(sc);
ar->resetFlag1 = 1;
bzero((ar), 0x1FF0); /* fill memory board with 0 */
ar->resetFlag1 = 0;
sc->arl_control = 0;
/* if (arl_wait_reset(sc, 0x168, ARDELAY1))
return;
*/
#if 1
{
int cnt = 0x168;
int delay = ARDELAY1;
ar->resetFlag = 0xFF; /* wish reset */
ar->controlRegister = 0; /* unreeze - do it */
while (ar->resetFlag && cnt--)
DELAY(delay);
if (cnt == 0) {
printf("arl%d: reset timeout\n", sc->arl_unit);
return;
}
D(("reset wait %d\n", 0x168 - cnt));
}
#endif
if (ar->diagnosticInfo != 0xff) {
printf("arl%d: reset error\n", sc->arl_unit);
return;
}
arl_config(sc);
}
/*
* configure radio parameters
*/
static void
arl_config(sc)
struct arl_softc *sc;
{
int i;
D(("config\n"));
SET_ARL_PARAM(spreadingCode);
SET_ARL_PARAM(channelNumber);
SET_ARL_PARAM(channelSet);
SET_ARL_PARAM(registrationMode);
SET_ARL_PARAM(priority);
SET_ARL_PARAM(receiveMode);
bcopy(arcfg.sid, ar->systemId, 4 * sizeof(ar->systemId[0]));
bcopy(arcfg.specifiedRouter, ar->specifiedRouter, ETHER_ADDR_LEN);
bcopy(arcfg.lanCardNodeId, ar->lanCardNodeId, ETHER_ADDR_LEN);
bzero(ar->name, ARLAN_NAME_SIZE); /* clear name */
strncpy(ar->name, arcfg.name, ARLAN_NAME_SIZE);
ar->diagnosticInfo = 0;
ar->commandByte = 1;
ARL_CHANNEL(sc);
DELAY(ARDELAY1);
if (arl_command(sc)) {
D(("config failed\n"));
return;
}
for (i = 0x168; ar->diagnosticInfo == 0 && i; i--)
DELAY(ARDELAY1);
if (i == 0) {
D(("config timeout\n"));
return;
}
if (ar->diagnosticInfo != 0xff) {
D(("config error\n"));
return;
}
D(("config lanCardNodeId %6D\n", ar->lanCardNodeId, ":"));
D(("config channel set %d, frequency %d, spread %d, mode %d\n",
ar->channelSet,
ar->channelNumber,
ar->spreadingCode,
ar->registrationMode));
/* clear quality stat */
bzero(sc->arl_sigcache, MAXARLCACHE * sizeof(struct arl_sigcache));
}
/*
* Socket Ioctl's.
*/
static int
arl_ioctl(ifp, cmd, data)
register struct ifnet *ifp;
u_long cmd;
caddr_t data;
{
struct arl_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *)data;
struct ieee80211req *ireq = (struct ieee80211req *)data;
d_thread_t *td = _ARL_CURPROC;
struct arl_req arlan_io;
int count, s, error = 0;
u_int8_t tmpstr[IEEE80211_NWID_LEN*2];
u_int8_t *tmpptr;
u_int32_t newsid;
caddr_t user;
D(("ioctl %lx\n", cmd));
s = splimp();
switch (cmd) {
case SIOCSIFADDR:
case SIOCGIFADDR:
case SIOCSIFMTU:
error = ether_ioctl(ifp, cmd, data);
break;
case SIOCSIFFLAGS:
if (ifp->if_flags & IFF_UP) {
if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
arl_init(sc);
} else {
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
arl_stop(sc);
}
break;
case SIOCSIFMEDIA:
case SIOCGIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &sc->arl_ifmedia, cmd);
break;
case SIOCG80211:
switch (ireq->i_type) {
case IEEE80211_IOC_SSID:
if (ireq->i_val != -1) {
error = EINVAL;
break;
}
bzero(tmpstr, IEEE80211_NWID_LEN);
snprintf(tmpstr, IEEE80211_NWID_LEN - 1, "0x%08x",
*(int *)arcfg.sid);
ireq->i_len = IEEE80211_NWID_LEN;
error = copyout(tmpstr, ireq->i_data,
IEEE80211_NWID_LEN);
break;
case IEEE80211_IOC_STATIONNAME:
ireq->i_len = sizeof(arcfg.name);
tmpptr = arcfg.name;
bzero(tmpstr, IEEE80211_NWID_LEN);
bcopy(tmpptr, tmpstr, ireq->i_len);
error = copyout(tmpstr, ireq->i_data,
IEEE80211_NWID_LEN);
break;
case IEEE80211_IOC_CHANNEL:
ireq->i_val = arcfg.channelNumber;
break;
case IEEE80211_IOC_POWERSAVE:
ireq->i_val = (arcfg.registrationMode == 2 ?
IEEE80211_POWERSAVE_PSP :
IEEE80211_POWERSAVE_OFF);
break;
default:
error = EINVAL;
break;
}
break;
case SIOCS80211:
if ((error = priv_check(td, PRIV_NET80211_MANAGE)))
break;
switch (ireq->i_type) {
case IEEE80211_IOC_SSID:
if (ireq->i_len > 4) {
error = EINVAL;
break;
}
bzero(&newsid, sizeof(newsid));
error = copyin(ireq->i_data,
(u_char *)(&newsid) + 4 - ireq->i_len,
ireq->i_len);
if (error)
break;
newsid = htonl(newsid);
if (newsid < 0 || newsid % 2) {
error = EINVAL;
break;
}
bcopy(&newsid, arcfg.sid, sizeof(arcfg.sid));
break;
case IEEE80211_IOC_STATIONNAME:
if (ireq->i_len > ARLAN_NAME_SIZE) {
error = EINVAL;
break;
}
bzero(arcfg.name, ARLAN_NAME_SIZE);
error = copyin(ireq->i_data, arcfg.name, ireq->i_len);
break;
case IEEE80211_IOC_CHANNEL:
if (ireq->i_val < 0 || ireq->i_val > 5) {
error = EINVAL;
break;
}
arcfg.channelNumber = ireq->i_val;
break;
case IEEE80211_IOC_POWERSAVE:
switch (ireq->i_val) {
case IEEE80211_POWERSAVE_OFF:
if (arcfg.registrationMode == 2)
arcfg.registrationMode = 1;
break;
case IEEE80211_POWERSAVE_ON:
case IEEE80211_POWERSAVE_PSP:
arcfg.registrationMode = 2;
break;
default:
error = EINVAL;
break;
}
break;
default:
error = EINVAL;
break;
}
if (!error)
arl_config(sc);
break;
#define GET_PARAM(name) (arlan_io.cfg.name = arcfg.name)
#define GET_COPY_PARAM(name) \
{ \
bzero(arlan_io.cfg.name, sizeof(arlan_io.cfg.name)); \
bcopy(arcfg.name, arlan_io.cfg.name, sizeof(arlan_io.cfg.name)); \
}
case SIOCGARLALL:
bzero(&arlan_io, sizeof(arlan_io));
if (!priv_check(td, PRIV_DRIVER)) {
bcopy(ar->systemId, arlan_io.cfg.sid, 4);
}
GET_COPY_PARAM(name);
GET_COPY_PARAM(lanCardNodeId);
GET_COPY_PARAM(specifiedRouter);
GET_PARAM(channelNumber);
GET_PARAM(channelSet);
GET_PARAM(spreadingCode);
GET_PARAM(registrationMode);
GET_PARAM(hardwareType);
GET_PARAM(majorHardwareVersion);
GET_PARAM(minorHardwareVersion);
GET_PARAM(radioModule);
GET_PARAM(priority);
GET_PARAM(receiveMode);
GET_PARAM(txRetry);
user = (void *)ifr->ifr_data;
for (count = 0; count < sizeof(arlan_io); count++)
if (subyte(user + count, ((char *)&arlan_io)[count]))
return (EFAULT);
break;
#define SET_PARAM(name) \
do { \
if (arlan_io.what_set & ARLAN_SET_##name) \
arcfg.name = arlan_io.cfg.name; \
} while (0)
#define SET_COPY_PARAM(name) \
do { \
if (arlan_io.what_set & ARLAN_SET_##name) { \
bzero(arcfg.name, sizeof(arcfg.name)); \
bcopy(arlan_io.cfg.name, arcfg.name, sizeof(arcfg.name)); \
} \
} while (0)
case SIOCSARLALL:
if (priv_check(td, PRIV_DRIVER))
break;
user = (void *)ifr->ifr_data;
for (count = 0; count < sizeof(arlan_io); count++) {
if (fubyte(user + count) < 0)
return (EFAULT);
}
bcopy(user, (char *)&arlan_io, sizeof(arlan_io));
D(("need set 0x%04x\n", arlan_io.what_set));
if (arlan_io.what_set) {
SET_COPY_PARAM(name);
SET_COPY_PARAM(sid);
SET_COPY_PARAM(specifiedRouter);
SET_COPY_PARAM(lanCardNodeId);
SET_PARAM(channelSet);
SET_PARAM(channelNumber);
SET_PARAM(spreadingCode);
SET_PARAM(registrationMode);
SET_PARAM(priority);
SET_PARAM(receiveMode);
SET_PARAM(txRetry);
arl_config(sc);
}
#undef SET_COPY_PARAM
#undef SET_PARAM
#undef GET_COPY_PARAM
#undef GET_PARAM
break;
#ifdef ARLCACHE
case SIOCGARLQLT:
user = (void *)ifr->ifr_data;
for (count = 0; count < sizeof(sc->arl_sigcache); count++) {
if (fubyte(user + count) < 0)
return (EFAULT);
}
while (ar->interruptInProgress) ; /* wait */
bcopy(&(sc->arl_sigcache), (void *)ifr->ifr_data, sizeof(sc->arl_sigcache));
break;
#endif
case SIOCGARLSTB:
user = (void *)ifr->ifr_data;
for (count = 0; count < sizeof(struct arl_stats); count++) {
if (fubyte(user + count) < 0)
return (EFAULT);
}
while (ar->lancpuLock) ;
ar->hostcpuLock = 1;
bcopy(&(ar->stat), (void *)ifr->ifr_data, sizeof(struct arl_stats));
ar->hostcpuLock = 0;
break;
default:
error = EINVAL;
}
splx(s);
return (error);
}
/*
* Wait registration
*/
static void
arl_waitreg(ifp)
struct ifnet *ifp;
{
struct arl_softc *sc = ifp->if_softc;
D(("wait reg\n"));
if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
if (ARL_CHECKREG(sc)) {
/* wait registration */
D(("wait registration\n"));
ifp->if_watchdog = arl_waitreg;
ifp->if_timer = 2;
} else {
/* registration restored */
D(("registration restored\n"));
ifp->if_timer = 0;
arl_init(sc);
}
}
}
/*
* Handle transmit timeouts.
*/
static void
arl_watchdog(ifp)
struct ifnet *ifp;
{
struct arl_softc *sc = ifp->if_softc;
if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
return;
D(("device timeout\n"));
if (ARL_CHECKREG(sc)) {
/* Lost registratoin */
D(("timeout lost registration\n"));
ifp->if_watchdog = arl_waitreg;
ifp->if_timer = 2;
}
}
/*
* Initialize
*/
static void
arl_init(xsc)
void *xsc;
{
struct arl_softc *sc = xsc;
struct ifnet *ifp = sc->arl_ifp;
int s;
D(("init\n"));
s = splimp();
if (ARL_CHECKREG(sc))
arl_reset(sc);
arl_enable(sc);
/* set flags */
ifp->if_drv_flags |= IFF_DRV_RUNNING;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
arl_start(ifp);
splx(s);
D(("init done\n"));
}
/*
* Put buffer into arlan buffer and start transmit
*/
static void
arl_put(sc)
struct arl_softc *sc;
{
struct arl_tx_param txp;
int i;
if (ARL_CHECKREG(sc))
sc->arl_ifp->if_oerrors++;
/* copy dst adr */
for(i = 0; i < 6; i++)
txp.dest[i] = sc->arl_tx[i];
txp.clear = 0;
txp.retries = arcfg.txRetry; /* use default value */
txp.routing = 1;
txp.scrambled = 0;
txp.offset = (intptr_t)ar->txBuffer - (intptr_t)(ar);
txp.length = sc->tx_len - ARLAN_HEADER_SIZE;
#ifdef SEND_ARLAN_HEADER
if (ar->registrationMode != 1)
txp.length = sc->tx_len;
#endif
/* copy from internal buffer to adapter memory */
#ifdef SEND_ARLAN_HEADER
if (ar->registrationMode)
#endif
bcopy(sc->arl_tx + ARLAN_HEADER_SIZE,
ar->txBuffer,
sc->tx_len - ARLAN_HEADER_SIZE);
#ifdef SEND_ARLAN_MODE
else
bcopy(sc->arl_tx, ar->txBuffer, sc->tx_len);
#endif
/* copy command parametr */
bcopy(&txp, ar->commandParameter, 14);
ar->commandByte = 0x85; /* send command */
ARL_CHANNEL(sc);
if (arl_command(sc))
sc->arl_ifp->if_oerrors++;
}
/*
* start output
*/
static void
arl_start(ifp)
struct ifnet *ifp;
{
struct arl_softc *sc;
struct mbuf *m;
struct mbuf *m0 = NULL;
sc = ifp->if_softc;
D(("start\n"));
/* Don't do anything if output is active */
if (ifp->if_drv_flags & IFF_DRV_OACTIVE)
return;
/* Dequeue the next datagram */
IF_DEQUEUE(&ifp->if_snd, m0);
/* If there's nothing to send, return. */
if (m0 != NULL) {
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
/* Copy the datagram to the buffer. */
sc->tx_len = 0;
for(m = m0; m != NULL; m = m->m_next) {
if (m->m_len == 0)
continue;
bcopy(mtod(m, caddr_t),
sc->arl_tx + sc->tx_len, m->m_len);
sc->tx_len += m->m_len;
}
/* if packet size is less than minimum ethernet frame size,
* pad it with zeroes to that size */
if (sc->tx_len < ETHER_MIN_LEN) {
bzero(sc->arl_tx + sc->tx_len, ETHER_MIN_LEN - sc->tx_len);
sc->tx_len = ETHER_MIN_LEN;
}
/* Give the packet to the bpf, if any */
BPF_MTAP(ifp, m0);
m_freem(m0);
/* Now transmit the datagram */
ifp->if_timer = 1; /* wait 1 sec */
ifp->if_watchdog = arl_watchdog;
arl_put(sc);
}
}
/*
* stop interface
*/
void
arl_stop(sc)
struct arl_softc *sc;
{
struct ifnet *ifp;
int s;
s = splimp();
ifp = sc->arl_ifp;
ifp->if_timer = 0; /* disable timer */
ifp->if_drv_flags &= ~(IFF_DRV_RUNNING|IFF_DRV_OACTIVE);
/* arl_hwreset(unit); */
sc->rx_len = 0;
sc->tx_len = 0;
/* disable interrupt */
ar->controlRegister = 0;
splx(s);
}
/*
* Pull read data off a interface.
* Len is length of data, with local net header stripped.
*/
static struct mbuf*
arl_get(buf, totlen, off0, ifp)
caddr_t buf;
int totlen;
int off0;
struct ifnet * ifp;
{
struct mbuf *top, **mp, *m;
int off = off0, len;
caddr_t cp = buf;
char *epkt;
cp = buf;
epkt = cp + totlen;
if (off) {
cp += off + 2 * sizeof(u_short);
totlen -= 2 * sizeof(u_short);
}
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 = &top;
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);
}
/* ------------------------------------------------------------------
* * Pass a packet up to the higher levels.
* */
static void
arl_read(sc, buf, len)
struct arl_softc *sc;
caddr_t buf;
int len;
{
register struct ether_header *eh;
struct ifnet *ifp = sc->arl_ifp;
struct mbuf *m;
eh = (struct ether_header *)buf;
/*
* Check if there's a bpf filter listening on this interface.
* If so, hand off the raw packet to bpf.
*/
if (bpf_peers_present(ifp->if_bpf)) {
/*
* Note that the interface cannot be in promiscuous mode if
* there are no bpf listeners. And if el are in promiscuous
* mode, el have to check if this packet is really ours.
*
* This test does not support multicasts.
*/
if ((ifp->if_flags & IFF_PROMISC)
&& bcmp(eh->ether_dhost, IF_LLADDR(sc->arl_ifp),
sizeof(eh->ether_dhost)) != 0
&& bcmp(eh->ether_dhost, BROADCASTADDR,
sizeof(eh->ether_dhost)) != 0)
return;
}
/*
* Pull packet off interface.
*/
#if __FreeBSD_version < 500100
buf += sizeof(struct ether_header);
len -= sizeof(struct ether_header);
#endif
m = arl_get(buf, len, 0, ifp);
if (m == 0)
return;
#ifdef ARLCACHE
arl_cache_store(sc, eh, ar->rxQuality & 0x0f,
(ar->rxQuality & 0xf0) >> 4, ARLCACHE_RX);
#endif
#if __FreeBSD_version < 500100
ether_input(ifp, eh, m);
#else
(*ifp->if_input)(ifp, m);
#endif
}
/*
* get packet from adapter
*/
static void
arl_recv(sc)
struct arl_softc *sc;
{
sc->rx_len = ar->rxLength;
if (sc->rx_len) {
#ifdef SEND_ARLAN_HEADER
if (ar->registrationMode == 1) {
#endif
bcopy(ar->ultimateDestAddress, sc->arl_rx, 6);
bcopy(ar->rxSrc, (char*)sc->arl_rx + 6, 6);
bcopy((char *)(ar) + ar->rxOffset,
(char *)sc->arl_rx + 12,
sc->rx_len);
sc->rx_len += ARLAN_HEADER_SIZE;
#ifdef SEND_ARLAN_HEADER
} else {
bcopy((char *)(ar) + ar->rxOffset,
(char *)sc->arl_rx, sc->rx_len);
}
#endif
}
}
/*
* Ethernet interface interrupt processor
*/
void
arl_intr(arg)
void *arg;
{
register struct arl_softc *sc = (struct arl_softc *) arg;
struct ifnet *ifp = sc->arl_ifp;
/* enable interrupt */
ar->controlRegister = (sc->arl_control & ~ARL_CLEAR_INTERRUPT);
ar->controlRegister = (sc->arl_control | ARL_CLEAR_INTERRUPT);
if (ar->txStatusVector) {
if (ar->txStatusVector != 1)
sc->arl_ifp->if_collisions++;
ifp->if_timer = 0; /* disable timer */
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
arl_start(ifp);
ar->txStatusVector = 0;
#ifdef ARLCACHE
arl_cache_store(sc,
(struct ether_header *)(sc->arl_tx),
ar->txAckQuality & 0x0f,
(ar->txAckQuality & 0xf0) >> 4, ARLCACHE_TX);
#endif
}
if (ar->rxStatusVector) {
if (ar->rxStatusVector == 1) { /* it is data frame */
arl_recv(sc);
arl_read(sc, sc->arl_rx, sc->rx_len);
ifp->if_opackets++;
}
ar->rxStatusVector = 0;
ar->commandByte = 0x83;
ar->commandParameter[0] = 1;
ARL_CHANNEL(sc);
if (arl_command(sc))
ifp->if_ierrors++;
}
return;
}
/*
* waiting for resetFlag dropped
*/
int
arl_wait_reset(sc, cnt, delay)
struct arl_softc *sc;
int cnt;
int delay;
{
D(("wait_reset cnt=%d delay=%d\n", cnt, delay));
ar->resetFlag = 1; /* wish reset */
ar->controlRegister = 0; /* unreeze - do it */
while (ar->resetFlag && cnt--)
DELAY(delay);
D(("reset done. %d cycles left\n", cnt));
if (cnt == 0)
printf("arl%d: reset failed\n", sc->arl_unit);
return (cnt == 0);
}
/*
* Allocate an irq resource with the given resource id
*/
int
arl_alloc_irq(dev, rid, flags)
device_t dev;
int rid;
int flags;
{
struct arl_softc *sc = device_get_softc(dev);
struct resource *res;
res = bus_alloc_resource_any(
dev, SYS_RES_IRQ, &rid, (RF_ACTIVE | flags));
if (res) {
sc->irq_rid = rid;
sc->irq_res = res;
return (0);
} else
return (ENOENT);
}
/*
* Allocate an memory resource with the given resource id
*/
int
arl_alloc_memory(dev, rid, size)
device_t dev;
int rid;
int size;
{
struct arl_softc *sc = device_get_softc(dev);
struct resource *res;
res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
0ul, ~0ul, size, RF_ACTIVE);
if (res) {
sc->mem_rid = rid;
sc->mem_res = res;
return (0);
} else
return (ENOENT);
}
/*
* Release all resources
*/
void
arl_release_resources(dev)
device_t dev;
{
struct arl_softc *sc = device_get_softc(dev);
if (sc->mem_res) {
bus_release_resource(dev, SYS_RES_MEMORY,
sc->mem_rid, sc->mem_res);
sc->mem_res = 0;
}
if (sc->irq_res) {
bus_release_resource(dev, SYS_RES_IRQ,
sc->irq_rid, sc->irq_res);
sc->irq_res = 0;
}
}
#ifdef ARLCACHE
static void
arl_cache_store(sc, eh, level, quality, dir)
struct arl_softc *sc;
struct ether_header *eh;
u_int8_t level;
u_int8_t quality;
int dir;
{
int i;
static int cache_slot = 0;
static int wrapindex = 0;
u_int8_t zero[6] = {0, 0, 0, 0, 0, 0};
u_char *mac;
if ((ntohs(eh->ether_type) != ETHERTYPE_IP)) {
return;
}
mac = (dir == ARLCACHE_RX ? eh->ether_shost : eh->ether_dhost);
for (i = 0; i < MAXARLCACHE; i++) {
if (!bcmp(zero, sc->arl_sigcache[i].macsrc, 6) ||
!bcmp(mac, sc->arl_sigcache[i].macsrc, 6))
break;
}
if (i < MAXARLCACHE)
cache_slot = i;
else {
if (wrapindex == MAXARLCACHE)
wrapindex = 0;
cache_slot = wrapindex++;
}
bcopy(dir == ARLCACHE_RX ? eh->ether_shost : eh->ether_dhost,
sc->arl_sigcache[cache_slot].macsrc, 6);
sc->arl_sigcache[cache_slot].level[dir] = level;
sc->arl_sigcache[cache_slot].quality[dir] = quality;
}
#endif
static int
arl_media_change(ifp)
struct ifnet *ifp;
{
struct arl_softc *sc = ifp->if_softc;
int otype = arcfg.registrationMode;
int orate = arcfg.spreadingCode;
int nrate, i;
nrate = IFM_SUBTYPE(sc->arl_ifmedia.ifm_cur->ifm_media);
for(i = 1; i <= 4; i++) {
if (rate2media[i - 1] == nrate)
break;
}
if (i == 5)
return (EINVAL);
arcfg.spreadingCode = i;
/* XXX Need fix for PSP mode */
if ((sc->arl_ifmedia.ifm_cur->ifm_media & IFM_IEEE80211_ADHOC) != 0)
arcfg.registrationMode = 0;
else
arcfg.registrationMode = 1;
if (otype != arcfg.registrationMode ||
orate != arcfg.spreadingCode)
arl_config(sc);
return (0);
}
static void
arl_media_status(ifp, imr)
struct ifnet *ifp;
struct ifmediareq *imr;
{
struct arl_softc *sc = ifp->if_softc;
imr->ifm_active = IFM_IEEE80211;
if (arcfg.registrationMode == 0)
imr->ifm_active |= IFM_IEEE80211_ADHOC;
imr->ifm_active |= IFM_MAKEWORD(IFM_IEEE80211,
rate2media[arcfg.spreadingCode - 1], 0, 0);
imr->ifm_status = IFM_AVALID;
if (!ARL_CHECKREG(sc))
imr->ifm_status |= IFM_ACTIVE;
}
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