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freebsd-skq/sys/pci/if_pn.c
Peter Wemm 579f45fa60 Simplify the COMPAT_PCI_DRIVER/DATA_SET hack. We can add: 
#define COMPAT_PCI_DRIVER(name,data) DATA_SET(pcidevice_set,data)
.. to 2.2.x and 3.x if people think it's worth it.  Driver writers can do
this if it's not defined.  (The reason for this is that I'm trying to
progressively eliminate use of linker_sets where it hurts modularity and
runtime load capability, and these DATA_SET's keep getting in the way.)
1999-05-09 17:07:30 +00:00

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/*
* Copyright (c) 1997, 1998
* Bill Paul <wpaul@ctr.columbia.edu>. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Bill Paul.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
* 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.
*
* $Id: if_pn.c,v 1.18 1999/04/24 20:14:00 peter Exp $
*/
/*
* 82c168/82c169 PNIC fast ethernet PCI NIC driver
*
* Supports various network adapters based on the Lite-On PNIC
* PCI network controller chip including the LinkSys LNE100TX.
*
* Written by Bill Paul <wpaul@ctr.columbia.edu>
* Electrical Engineering Department
* Columbia University, New York City
*/
/*
* The PNIC chip is a DEC tulip clone. This driver uses much of the
* same code from the driver for the Winbond chip (which is also a
* tulip clone) except for the MII, EEPROM and filter programming.
*
* Technically we could merge support for this chip into the 'de'
* driver, but it's such a mess that I'm afraid to go near it.
*
* The PNIC appears to support both an external MII and an internal
* transceiver. I think most 100Mbps implementations use a PHY attached
* the the MII. The LinkSys board that I have uses a Myson MTD972
* 100BaseTX PHY.
*/
#include "bpfilter.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#if NBPFILTER > 0
#include <net/bpf.h>
#endif
#include <vm/vm.h> /* for vtophys */
#include <vm/pmap.h> /* for vtophys */
#include <machine/clock.h> /* for DELAY */
#include <machine/bus_pio.h>
#include <machine/bus_memio.h>
#include <machine/bus.h>
#include <pci/pcireg.h>
#include <pci/pcivar.h>
#define PN_USEIOSPACE
/* #define PN_BACKGROUND_AUTONEG */
#define PN_RX_BUG_WAR
#include <pci/if_pnreg.h>
#ifndef lint
static const char rcsid[] =
"$Id: if_pn.c,v 1.18 1999/04/24 20:14:00 peter Exp $";
#endif
#ifdef __alpha__
#undef vtophys
#define vtophys(va) (pmap_kextract(((vm_offset_t) (va))) \
+ 1*1024*1024*1024)
#endif
/*
* Various supported device vendors/types and their names.
*/
static struct pn_type pn_devs[] = {
{ PN_VENDORID, PN_DEVICEID_PNIC,
"82c168 PNIC 10/100BaseTX" },
{ PN_VENDORID, PN_DEVICEID_PNIC,
"82c169 PNIC 10/100BaseTX" },
{ PN_VENDORID, PN_DEVICEID_PNIC_II,
"82c115 PNIC II 10/100BaseTX" },
{ 0, 0, NULL }
};
/*
* Various supported PHY vendors/types and their names. Note that
* this driver will work with pretty much any MII-compliant PHY,
* so failure to positively identify the chip is not a fatal error.
*/
static struct pn_type pn_phys[] = {
{ TI_PHY_VENDORID, TI_PHY_10BT, "<TI ThunderLAN 10BT (internal)>" },
{ TI_PHY_VENDORID, TI_PHY_100VGPMI, "<TI TNETE211 100VG Any-LAN>" },
{ NS_PHY_VENDORID, NS_PHY_83840A, "<National Semiconductor DP83840A>"},
{ LEVEL1_PHY_VENDORID, LEVEL1_PHY_LXT970, "<Level 1 LXT970>" },
{ INTEL_PHY_VENDORID, INTEL_PHY_82555, "<Intel 82555>" },
{ SEEQ_PHY_VENDORID, SEEQ_PHY_80220, "<SEEQ 80220>" },
{ 0, 0, "<MII-compliant physical interface>" }
};
static unsigned long pn_count = 0;
static const char *pn_probe __P((pcici_t, pcidi_t));
static void pn_attach __P((pcici_t, int));
static int pn_newbuf __P((struct pn_softc *,
struct pn_chain_onefrag *));
static int pn_encap __P((struct pn_softc *, struct pn_chain *,
struct mbuf *));
#ifdef PN_RX_BUG_WAR
static void pn_rx_bug_war __P((struct pn_softc *,
struct pn_chain_onefrag *));
#endif
static void pn_rxeof __P((struct pn_softc *));
static void pn_rxeoc __P((struct pn_softc *));
static void pn_txeof __P((struct pn_softc *));
static void pn_txeoc __P((struct pn_softc *));
static void pn_intr __P((void *));
static void pn_start __P((struct ifnet *));
static int pn_ioctl __P((struct ifnet *, u_long, caddr_t));
static void pn_init __P((void *));
static void pn_stop __P((struct pn_softc *));
static void pn_watchdog __P((struct ifnet *));
static void pn_shutdown __P((int, void *));
static int pn_ifmedia_upd __P((struct ifnet *));
static void pn_ifmedia_sts __P((struct ifnet *, struct ifmediareq *));
static void pn_eeprom_getword __P((struct pn_softc *, u_int8_t, u_int16_t *));
static void pn_read_eeprom __P((struct pn_softc *, caddr_t, int,
int, int));
static u_int16_t pn_phy_readreg __P((struct pn_softc *, int));
static void pn_phy_writereg __P((struct pn_softc *, u_int16_t, u_int16_t));
static void pn_autoneg_xmit __P((struct pn_softc *));
static void pn_autoneg_mii __P((struct pn_softc *, int, int));
static void pn_setmode_mii __P((struct pn_softc *, int));
static void pn_getmode_mii __P((struct pn_softc *));
static void pn_autoneg __P((struct pn_softc *, int, int));
static void pn_setmode __P((struct pn_softc *, int));
static void pn_setcfg __P((struct pn_softc *, u_int32_t));
static u_int32_t pn_calchash __P((u_int8_t *));
static void pn_setfilt __P((struct pn_softc *));
static void pn_reset __P((struct pn_softc *));
static int pn_list_rx_init __P((struct pn_softc *));
static int pn_list_tx_init __P((struct pn_softc *));
#define PN_SETBIT(sc, reg, x) \
CSR_WRITE_4(sc, reg, \
CSR_READ_4(sc, reg) | (x))
#define PN_CLRBIT(sc, reg, x) \
CSR_WRITE_4(sc, reg, \
CSR_READ_4(sc, reg) & ~(x))
/*
* Read a word of data stored in the EEPROM at address 'addr.'
*/
static void pn_eeprom_getword(sc, addr, dest)
struct pn_softc *sc;
u_int8_t addr;
u_int16_t *dest;
{
register int i;
u_int32_t r;
CSR_WRITE_4(sc, PN_SIOCTL, PN_EE_READ|addr);
for (i = 0; i < PN_TIMEOUT; i++) {
DELAY(1);
r = CSR_READ_4(sc, PN_SIO);
if (!(r & PN_SIO_BUSY)) {
*dest = (u_int16_t)(r & 0x0000FFFF);
return;
}
}
return;
}
/*
* Read a sequence of words from the EEPROM.
*/
static void pn_read_eeprom(sc, dest, off, cnt, swap)
struct pn_softc *sc;
caddr_t dest;
int off;
int cnt;
int swap;
{
int i;
u_int16_t word = 0, *ptr;
for (i = 0; i < cnt; i++) {
pn_eeprom_getword(sc, off + i, &word);
ptr = (u_int16_t *)(dest + (i * 2));
if (swap)
*ptr = ntohs(word);
else
*ptr = word;
}
return;
}
static u_int16_t pn_phy_readreg(sc, reg)
struct pn_softc *sc;
int reg;
{
int i;
u_int32_t rval;
CSR_WRITE_4(sc, PN_MII,
PN_MII_READ | (sc->pn_phy_addr << 23) | (reg << 18));
for (i = 0; i < PN_TIMEOUT; i++) {
DELAY(1);
rval = CSR_READ_4(sc, PN_MII);
if (!(rval & PN_MII_BUSY)) {
if ((u_int16_t)(rval & 0x0000FFFF) == 0xFFFF)
return(0);
else
return((u_int16_t)(rval & 0x0000FFFF));
}
}
return(0);
}
static void pn_phy_writereg(sc, reg, data)
struct pn_softc *sc;
u_int16_t reg;
u_int16_t data;
{
int i;
CSR_WRITE_4(sc, PN_MII,
PN_MII_WRITE | (sc->pn_phy_addr << 23) | (reg << 18) | data);
for (i = 0; i < PN_TIMEOUT; i++) {
if (!(CSR_READ_4(sc, PN_MII) & PN_MII_BUSY))
break;
}
return;
}
#define PN_POLY 0xEDB88320
#define PN_BITS 9
static u_int32_t pn_calchash(addr)
u_int8_t *addr;
{
u_int32_t idx, bit, data, crc;
/* Compute CRC for the address value. */
crc = 0xFFFFFFFF; /* initial value */
for (idx = 0; idx < 6; idx++) {
for (data = *addr++, bit = 0; bit < 8; bit++, data >>= 1)
crc = (crc >> 1) ^ (((crc ^ data) & 1) ? PN_POLY : 0);
}
return (crc & ((1 << PN_BITS) - 1));
}
/*
* Initiate an autonegotiation session.
*/
static void pn_autoneg_xmit(sc)
struct pn_softc *sc;
{
u_int16_t phy_sts;
pn_phy_writereg(sc, PHY_BMCR, PHY_BMCR_RESET);
DELAY(500);
while(pn_phy_readreg(sc, PHY_BMCR)
& PHY_BMCR_RESET);
phy_sts = pn_phy_readreg(sc, PHY_BMCR);
phy_sts |= PHY_BMCR_AUTONEGENBL|PHY_BMCR_AUTONEGRSTR;
pn_phy_writereg(sc, PHY_BMCR, phy_sts);
return;
}
/*
* Invoke autonegotiation on a PHY.
*/
static void pn_autoneg_mii(sc, flag, verbose)
struct pn_softc *sc;
int flag;
int verbose;
{
u_int16_t phy_sts = 0, media, advert, ability;
struct ifnet *ifp;
struct ifmedia *ifm;
ifm = &sc->ifmedia;
ifp = &sc->arpcom.ac_if;
ifm->ifm_media = IFM_ETHER | IFM_AUTO;
/*
* The 100baseT4 PHY on the 3c905-T4 has the 'autoneg supported'
* bit cleared in the status register, but has the 'autoneg enabled'
* bit set in the control register. This is a contradiction, and
* I'm not sure how to handle it. If you want to force an attempt
* to autoneg for 100baseT4 PHYs, #define FORCE_AUTONEG_TFOUR
* and see what happens.
*/
#ifndef FORCE_AUTONEG_TFOUR
/*
* First, see if autoneg is supported. If not, there's
* no point in continuing.
*/
phy_sts = pn_phy_readreg(sc, PHY_BMSR);
if (!(phy_sts & PHY_BMSR_CANAUTONEG)) {
if (verbose)
printf("pn%d: autonegotiation not supported\n",
sc->pn_unit);
ifm->ifm_media = IFM_ETHER|IFM_10_T|IFM_HDX;
return;
}
#endif
switch (flag) {
case PN_FLAG_FORCEDELAY:
/*
* XXX Never use this option anywhere but in the probe
* routine: making the kernel stop dead in its tracks
* for three whole seconds after we've gone multi-user
* is really bad manners.
*/
pn_autoneg_xmit(sc);
DELAY(5000000);
break;
case PN_FLAG_SCHEDDELAY:
/*
* Wait for the transmitter to go idle before starting
* an autoneg session, otherwise pn_start() may clobber
* our timeout, and we don't want to allow transmission
* during an autoneg session since that can screw it up.
*/
if (sc->pn_cdata.pn_tx_head != NULL) {
sc->pn_want_auto = 1;
return;
}
pn_autoneg_xmit(sc);
ifp->if_timer = 5;
sc->pn_autoneg = 1;
sc->pn_want_auto = 0;
return;
break;
case PN_FLAG_DELAYTIMEO:
ifp->if_timer = 0;
sc->pn_autoneg = 0;
break;
default:
printf("pn%d: invalid autoneg flag: %d\n", sc->pn_unit, flag);
return;
}
if (pn_phy_readreg(sc, PHY_BMSR) & PHY_BMSR_AUTONEGCOMP) {
if (verbose)
printf("pn%d: autoneg complete, ", sc->pn_unit);
phy_sts = pn_phy_readreg(sc, PHY_BMSR);
} else {
if (verbose)
printf("pn%d: autoneg not complete, ", sc->pn_unit);
}
media = pn_phy_readreg(sc, PHY_BMCR);
/* Link is good. Report modes and set duplex mode. */
if (pn_phy_readreg(sc, PHY_BMSR) & PHY_BMSR_LINKSTAT) {
if (verbose)
printf("link status good ");
advert = pn_phy_readreg(sc, PHY_ANAR);
ability = pn_phy_readreg(sc, PHY_LPAR);
if (advert & PHY_ANAR_100BT4 && ability & PHY_ANAR_100BT4) {
ifm->ifm_media = IFM_ETHER|IFM_100_T4;
media |= PHY_BMCR_SPEEDSEL;
media &= ~PHY_BMCR_DUPLEX;
printf("(100baseT4)\n");
} else if (advert & PHY_ANAR_100BTXFULL &&
ability & PHY_ANAR_100BTXFULL) {
ifm->ifm_media = IFM_ETHER|IFM_100_TX|IFM_FDX;
media |= PHY_BMCR_SPEEDSEL;
media |= PHY_BMCR_DUPLEX;
printf("(full-duplex, 100Mbps)\n");
} else if (advert & PHY_ANAR_100BTXHALF &&
ability & PHY_ANAR_100BTXHALF) {
ifm->ifm_media = IFM_ETHER|IFM_100_TX|IFM_HDX;
media |= PHY_BMCR_SPEEDSEL;
media &= ~PHY_BMCR_DUPLEX;
printf("(half-duplex, 100Mbps)\n");
} else if (advert & PHY_ANAR_10BTFULL &&
ability & PHY_ANAR_10BTFULL) {
ifm->ifm_media = IFM_ETHER|IFM_10_T|IFM_FDX;
media &= ~PHY_BMCR_SPEEDSEL;
media |= PHY_BMCR_DUPLEX;
printf("(full-duplex, 10Mbps)\n");
} else if (advert & PHY_ANAR_10BTHALF &&
ability & PHY_ANAR_10BTHALF) {
ifm->ifm_media = IFM_ETHER|IFM_10_T|IFM_HDX;
media &= ~PHY_BMCR_SPEEDSEL;
media &= ~PHY_BMCR_DUPLEX;
printf("(half-duplex, 10Mbps)\n");
}
media &= ~PHY_BMCR_AUTONEGENBL;
/* Set ASIC's duplex mode to match the PHY. */
pn_setcfg(sc, ifm->ifm_media);
pn_phy_writereg(sc, PHY_BMCR, media);
} else {
if (verbose)
printf("no carrier\n");
}
pn_init(sc);
if (sc->pn_tx_pend) {
sc->pn_autoneg = 0;
sc->pn_tx_pend = 0;
pn_start(ifp);
}
return;
}
static void pn_getmode_mii(sc)
struct pn_softc *sc;
{
u_int16_t bmsr;
struct ifnet *ifp;
ifp = &sc->arpcom.ac_if;
bmsr = pn_phy_readreg(sc, PHY_BMSR);
if (bootverbose)
printf("pn%d: PHY status word: %x\n", sc->pn_unit, bmsr);
/* fallback */
sc->ifmedia.ifm_media = IFM_ETHER|IFM_10_T|IFM_HDX;
if (bmsr & PHY_BMSR_10BTHALF) {
if (bootverbose)
printf("pn%d: 10Mbps half-duplex mode supported\n",
sc->pn_unit);
ifmedia_add(&sc->ifmedia,
IFM_ETHER|IFM_10_T|IFM_HDX, 0, NULL);
ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T, 0, NULL);
}
if (bmsr & PHY_BMSR_10BTFULL) {
if (bootverbose)
printf("pn%d: 10Mbps full-duplex mode supported\n",
sc->pn_unit);
ifmedia_add(&sc->ifmedia,
IFM_ETHER|IFM_10_T|IFM_FDX, 0, NULL);
sc->ifmedia.ifm_media = IFM_ETHER|IFM_10_T|IFM_FDX;
}
if (bmsr & PHY_BMSR_100BTXHALF) {
if (bootverbose)
printf("pn%d: 100Mbps half-duplex mode supported\n",
sc->pn_unit);
ifp->if_baudrate = 100000000;
ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_100_TX, 0, NULL);
ifmedia_add(&sc->ifmedia,
IFM_ETHER|IFM_100_TX|IFM_HDX, 0, NULL);
sc->ifmedia.ifm_media = IFM_ETHER|IFM_100_TX|IFM_HDX;
}
if (bmsr & PHY_BMSR_100BTXFULL) {
if (bootverbose)
printf("pn%d: 100Mbps full-duplex mode supported\n",
sc->pn_unit);
ifp->if_baudrate = 100000000;
ifmedia_add(&sc->ifmedia,
IFM_ETHER|IFM_100_TX|IFM_FDX, 0, NULL);
sc->ifmedia.ifm_media = IFM_ETHER|IFM_100_TX|IFM_FDX;
}
/* Some also support 100BaseT4. */
if (bmsr & PHY_BMSR_100BT4) {
if (bootverbose)
printf("pn%d: 100baseT4 mode supported\n", sc->pn_unit);
ifp->if_baudrate = 100000000;
ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_100_T4, 0, NULL);
sc->ifmedia.ifm_media = IFM_ETHER|IFM_100_T4;
#ifdef FORCE_AUTONEG_TFOUR
if (bootverbose)
printf("pn%d: forcing on autoneg support for BT4\n",
sc->pn_unit);
ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_AUTO, 0 NULL):
sc->ifmedia.ifm_media = IFM_ETHER|IFM_AUTO;
#endif
}
if (bmsr & PHY_BMSR_CANAUTONEG) {
if (bootverbose)
printf("pn%d: autoneg supported\n", sc->pn_unit);
ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_AUTO, 0, NULL);
sc->ifmedia.ifm_media = IFM_ETHER|IFM_AUTO;
}
return;
}
static void pn_autoneg(sc, flag, verbose)
struct pn_softc *sc;
int flag;
int verbose;
{
u_int32_t nway = 0, ability;
struct ifnet *ifp;
struct ifmedia *ifm;
ifm = &sc->ifmedia;
ifp = &sc->arpcom.ac_if;
ifm->ifm_media = IFM_ETHER | IFM_AUTO;
switch (flag) {
case PN_FLAG_FORCEDELAY:
/*
* XXX Never use this option anywhere but in the probe
* routine: making the kernel stop dead in its tracks
* for three whole seconds after we've gone multi-user
* is really bad manners.
*/
CSR_WRITE_4(sc, PN_GEN,
PN_GEN_MUSTBEONE|PN_GEN_100TX_LOOP);
PN_CLRBIT(sc, PN_NWAY, PN_NWAY_AUTONEGRSTR);
PN_SETBIT(sc, PN_NWAY, PN_NWAY_AUTOENB);
DELAY(5000000);
break;
case PN_FLAG_SCHEDDELAY:
/*
* Wait for the transmitter to go idle before starting
* an autoneg session, otherwise pn_start() may clobber
* our timeout, and we don't want to allow transmission
* during an autoneg session since that can screw it up.
*/
if (sc->pn_cdata.pn_tx_head != NULL) {
sc->pn_want_auto = 1;
return;
}
CSR_WRITE_4(sc, PN_GEN,
PN_GEN_MUSTBEONE|PN_GEN_100TX_LOOP);
PN_CLRBIT(sc, PN_NWAY, PN_NWAY_AUTONEGRSTR);
PN_SETBIT(sc, PN_NWAY, PN_NWAY_AUTOENB);
ifp->if_timer = 5;
sc->pn_autoneg = 1;
sc->pn_want_auto = 0;
return;
break;
case PN_FLAG_DELAYTIMEO:
ifp->if_timer = 0;
sc->pn_autoneg = 0;
break;
default:
printf("pn%d: invalid autoneg flag: %d\n", sc->pn_unit, flag);
return;
}
if (CSR_READ_4(sc, PN_NWAY) & PN_NWAY_LPAR) {
if (verbose)
printf("pn%d: autoneg complete, ", sc->pn_unit);
} else {
if (verbose)
printf("pn%d: autoneg not complete, ", sc->pn_unit);
}
/* Link is good. Report modes and set duplex mode. */
if (CSR_READ_4(sc, PN_ISR) & PN_ISR_LINKPASS) {
if (verbose)
printf("link status good ");
ability = CSR_READ_4(sc, PN_NWAY);
if (ability & PN_NWAY_LPAR100T4) {
ifm->ifm_media = IFM_ETHER|IFM_100_T4;
nway = PN_NWAY_MODE_100T4;
printf("(100baseT4)\n");
} else if (ability & PN_NWAY_LPAR100FULL) {
ifm->ifm_media = IFM_ETHER|IFM_100_TX|IFM_FDX;
nway = PN_NWAY_MODE_100FD;
printf("(full-duplex, 100Mbps)\n");
} else if (ability & PN_NWAY_LPAR100HALF) {
ifm->ifm_media = IFM_ETHER|IFM_100_TX|IFM_HDX;
nway = PN_NWAY_MODE_100HD;
printf("(half-duplex, 100Mbps)\n");
} else if (ability & PN_NWAY_LPAR10FULL) {
ifm->ifm_media = IFM_ETHER|IFM_10_T|IFM_FDX;
nway = PN_NWAY_MODE_10FD;
printf("(full-duplex, 10Mbps)\n");
} else if (ability & PN_NWAY_LPAR10HALF) {
ifm->ifm_media = IFM_ETHER|IFM_10_T|IFM_HDX;
nway = PN_NWAY_MODE_10HD;
printf("(half-duplex, 10Mbps)\n");
}
/* Set ASIC's duplex mode to match the PHY. */
pn_setcfg(sc, ifm->ifm_media);
CSR_WRITE_4(sc, PN_NWAY, nway);
} else {
if (verbose)
printf("no carrier\n");
}
pn_init(sc);
if (sc->pn_tx_pend) {
sc->pn_autoneg = 0;
sc->pn_tx_pend = 0;
pn_start(ifp);
}
return;
}
static void pn_setmode(sc, media)
struct pn_softc *sc;
int media;
{
struct ifnet *ifp;
ifp = &sc->arpcom.ac_if;
/*
* If an autoneg session is in progress, stop it.
*/
if (sc->pn_autoneg) {
printf("pn%d: canceling autoneg session\n", sc->pn_unit);
ifp->if_timer = sc->pn_autoneg = sc->pn_want_auto = 0;
PN_CLRBIT(sc, PN_NWAY, PN_NWAY_AUTONEGRSTR);
}
printf("pn%d: selecting NWAY, ", sc->pn_unit);
if (IFM_SUBTYPE(media) == IFM_100_T4) {
printf("100Mbps/T4, half-duplex\n");
}
if (IFM_SUBTYPE(media) == IFM_100_TX) {
printf("100Mbps, ");
}
if (IFM_SUBTYPE(media) == IFM_10_T) {
printf("10Mbps, ");
}
if ((media & IFM_GMASK) == IFM_FDX) {
printf("full duplex\n");
} else {
printf("half duplex\n");
}
pn_setcfg(sc, media);
return;
}
static void pn_setmode_mii(sc, media)
struct pn_softc *sc;
int media;
{
u_int16_t bmcr;
struct ifnet *ifp;
ifp = &sc->arpcom.ac_if;
/*
* If an autoneg session is in progress, stop it.
*/
if (sc->pn_autoneg) {
printf("pn%d: canceling autoneg session\n", sc->pn_unit);
ifp->if_timer = sc->pn_autoneg = sc->pn_want_auto = 0;
bmcr = pn_phy_readreg(sc, PHY_BMCR);
bmcr &= ~PHY_BMCR_AUTONEGENBL;
pn_phy_writereg(sc, PHY_BMCR, bmcr);
}
printf("pn%d: selecting MII, ", sc->pn_unit);
bmcr = pn_phy_readreg(sc, PHY_BMCR);
bmcr &= ~(PHY_BMCR_AUTONEGENBL|PHY_BMCR_SPEEDSEL|
PHY_BMCR_DUPLEX|PHY_BMCR_LOOPBK);
if (IFM_SUBTYPE(media) == IFM_100_T4) {
printf("100Mbps/T4, half-duplex\n");
bmcr |= PHY_BMCR_SPEEDSEL;
bmcr &= ~PHY_BMCR_DUPLEX;
}
if (IFM_SUBTYPE(media) == IFM_100_TX) {
printf("100Mbps, ");
bmcr |= PHY_BMCR_SPEEDSEL;
}
if (IFM_SUBTYPE(media) == IFM_10_T) {
printf("10Mbps, ");
bmcr &= ~PHY_BMCR_SPEEDSEL;
}
if ((media & IFM_GMASK) == IFM_FDX) {
printf("full duplex\n");
bmcr |= PHY_BMCR_DUPLEX;
} else {
printf("half duplex\n");
bmcr &= ~PHY_BMCR_DUPLEX;
}
pn_setcfg(sc, media);
pn_phy_writereg(sc, PHY_BMCR, bmcr);
return;
}
/*
* Programming the receiver filter on the tulip/PNIC is gross. You
* have to construct a special setup frame and download it to the
* chip via the transmit DMA engine. This routine is also somewhat
* gross, as the setup frame is sent synchronously rather than putting
* on the transmit queue. The transmitter has to be stopped, then we
* can download the frame and wait for the 'owned' bit to clear.
*
* We always program the chip using 'hash perfect' mode, i.e. one perfect
* address (our node address) and a 512-bit hash filter for multicast
* frames. We also sneak the broadcast address into the hash filter since
* we need that too.
*/
void pn_setfilt(sc)
struct pn_softc *sc;
{
struct pn_desc *sframe;
u_int32_t h, *sp;
struct ifmultiaddr *ifma;
struct ifnet *ifp;
int i;
ifp = &sc->arpcom.ac_if;
PN_CLRBIT(sc, PN_NETCFG, PN_NETCFG_TX_ON);
PN_SETBIT(sc, PN_ISR, PN_ISR_TX_IDLE);
sframe = &sc->pn_cdata.pn_sframe;
sp = (u_int32_t *)&sc->pn_cdata.pn_sbuf;
bzero((char *)sp, PN_SFRAME_LEN);
sframe->pn_status = PN_TXSTAT_OWN;
sframe->pn_next = vtophys(&sc->pn_ldata->pn_tx_list[0]);
sframe->pn_data = vtophys(&sc->pn_cdata.pn_sbuf);
sframe->pn_ctl = PN_SFRAME_LEN | PN_TXCTL_TLINK |
PN_TXCTL_SETUP | PN_FILTER_HASHPERF;
/* If we want promiscuous mode, set the allframes bit. */
if (ifp->if_flags & IFF_PROMISC)
PN_SETBIT(sc, PN_NETCFG, PN_NETCFG_RX_PROMISC);
else
PN_CLRBIT(sc, PN_NETCFG, PN_NETCFG_RX_PROMISC);
if (ifp->if_flags & IFF_ALLMULTI)
PN_SETBIT(sc, PN_NETCFG, PN_NETCFG_RX_ALLMULTI);
for (ifma = ifp->if_multiaddrs.lh_first; ifma != NULL;
ifma = ifma->ifma_link.le_next) {
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
h = pn_calchash(LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
sp[h >> 4] |= 1 << (h & 0xF);
}
if (ifp->if_flags & IFF_BROADCAST) {
h = pn_calchash(etherbroadcastaddr);
sp[h >> 4] |= 1 << (h & 0xF);
}
sp[39] = ((u_int16_t *)sc->arpcom.ac_enaddr)[0];
sp[40] = ((u_int16_t *)sc->arpcom.ac_enaddr)[1];
sp[41] = ((u_int16_t *)sc->arpcom.ac_enaddr)[2];
CSR_WRITE_4(sc, PN_TXADDR, vtophys(sframe));
PN_SETBIT(sc, PN_NETCFG, PN_NETCFG_TX_ON);
CSR_WRITE_4(sc, PN_TXSTART, 0xFFFFFFFF);
/*
* Wait for chip to clear the 'own' bit.
*/
for (i = 0; i < PN_TIMEOUT; i++) {
DELAY(10);
if (sframe->pn_status != PN_TXSTAT_OWN)
break;
}
if (i == PN_TIMEOUT)
printf("pn%d: failed to send setup frame\n", sc->pn_unit);
PN_SETBIT(sc, PN_ISR, PN_ISR_TX_NOBUF|PN_ISR_TX_IDLE);
return;
}
/*
* In order to fiddle with the
* 'full-duplex' and '100Mbps' bits in the netconfig register, we
* first have to put the transmit and/or receive logic in the idle state.
*/
static void pn_setcfg(sc, media)
struct pn_softc *sc;
u_int32_t media;
{
int i, restart = 0;
if (CSR_READ_4(sc, PN_NETCFG) & (PN_NETCFG_TX_ON|PN_NETCFG_RX_ON)) {
restart = 1;
PN_CLRBIT(sc, PN_NETCFG, (PN_NETCFG_TX_ON|PN_NETCFG_RX_ON));
for (i = 0; i < PN_TIMEOUT; i++) {
DELAY(10);
if ((CSR_READ_4(sc, PN_ISR) & PN_ISR_TX_IDLE) &&
(CSR_READ_4(sc, PN_ISR) & PN_ISR_RX_IDLE))
break;
}
if (i == PN_TIMEOUT)
printf("pn%d: failed to force tx and "
"rx to idle state\n", sc->pn_unit);
}
if (IFM_SUBTYPE(media) == IFM_100_TX) {
PN_CLRBIT(sc, PN_NETCFG, PN_NETCFG_SPEEDSEL);
if (sc->pn_pinfo == NULL) {
CSR_WRITE_4(sc, PN_GEN, PN_GEN_MUSTBEONE|
PN_GEN_SPEEDSEL|PN_GEN_100TX_LOOP);
PN_SETBIT(sc, PN_NETCFG, PN_NETCFG_PCS|
PN_NETCFG_SCRAMBLER|PN_NETCFG_MIIENB);
PN_SETBIT(sc, PN_NWAY, PN_NWAY_SPEEDSEL);
}
} else {
PN_SETBIT(sc, PN_NETCFG, PN_NETCFG_SPEEDSEL);
if (sc->pn_pinfo == NULL) {
CSR_WRITE_4(sc, PN_GEN,
PN_GEN_MUSTBEONE|PN_GEN_100TX_LOOP);
PN_CLRBIT(sc, PN_NETCFG, PN_NETCFG_PCS|
PN_NETCFG_SCRAMBLER|PN_NETCFG_MIIENB);
PN_CLRBIT(sc, PN_NWAY, PN_NWAY_SPEEDSEL);
}
}
if ((media & IFM_GMASK) == IFM_FDX) {
PN_SETBIT(sc, PN_NETCFG, PN_NETCFG_FULLDUPLEX);
if (sc->pn_pinfo == NULL)
PN_SETBIT(sc, PN_NWAY, PN_NWAY_DUPLEX);
} else {
PN_CLRBIT(sc, PN_NETCFG, PN_NETCFG_FULLDUPLEX);
if (sc->pn_pinfo == NULL)
PN_CLRBIT(sc, PN_NWAY, PN_NWAY_DUPLEX);
}
if (restart)
PN_SETBIT(sc, PN_NETCFG, PN_NETCFG_TX_ON|PN_NETCFG_RX_ON);
return;
}
static void pn_reset(sc)
struct pn_softc *sc;
{
register int i;
PN_SETBIT(sc, PN_BUSCTL, PN_BUSCTL_RESET);
for (i = 0; i < PN_TIMEOUT; i++) {
DELAY(10);
if (!(CSR_READ_4(sc, PN_BUSCTL) & PN_BUSCTL_RESET))
break;
}
if (i == PN_TIMEOUT)
printf("pn%d: reset never completed!\n", sc->pn_unit);
/* Wait a little while for the chip to get its brains in order. */
DELAY(1000);
return;
}
/*
* Probe for a Lite-On PNIC chip. Check the PCI vendor and device
* IDs against our list and return a device name if we find a match.
*/
static const char *
pn_probe(config_id, device_id)
pcici_t config_id;
pcidi_t device_id;
{
struct pn_type *t;
u_int32_t rev;
t = pn_devs;
while(t->pn_name != NULL) {
if ((device_id & 0xFFFF) == t->pn_vid &&
((device_id >> 16) & 0xFFFF) == t->pn_did) {
if (t->pn_did == PN_DEVICEID_PNIC) {
rev = pci_conf_read(config_id,
PN_PCI_REVISION) & 0xFF;
switch(rev & PN_REVMASK) {
case PN_REVID_82C168:
return(t->pn_name);
break;
case PN_REVID_82C169:
t++;
return(t->pn_name);
default:
printf("unknown PNIC rev: %x\n", rev);
break;
}
}
return(t->pn_name);
}
t++;
}
return(NULL);
}
/*
* Attach the interface. Allocate softc structures, do ifmedia
* setup and ethernet/BPF attach.
*/
static void
pn_attach(config_id, unit)
pcici_t config_id;
int unit;
{
int s, i;
#ifndef PN_USEIOSPACE
vm_offset_t pbase, vbase;
#endif
u_char eaddr[ETHER_ADDR_LEN];
u_int32_t command;
struct pn_softc *sc;
struct ifnet *ifp;
int media = IFM_ETHER|IFM_100_TX|IFM_FDX;
unsigned int round;
caddr_t roundptr;
struct pn_type *p;
u_int16_t phy_vid, phy_did, phy_sts;
#ifdef PN_RX_BUG_WAR
u_int32_t revision = 0;
#endif
s = splimp();
sc = malloc(sizeof(struct pn_softc), M_DEVBUF, M_NOWAIT);
if (sc == NULL) {
printf("pn%d: no memory for softc struct!\n", unit);
return;
}
bzero(sc, sizeof(struct pn_softc));
/*
* Handle power management nonsense.
*/
command = pci_conf_read(config_id, PN_PCI_CAPID) & 0x000000FF;
if (command == 0x01) {
command = pci_conf_read(config_id, PN_PCI_PWRMGMTCTRL);
if (command & PN_PSTATE_MASK) {
u_int32_t iobase, membase, irq;
/* Save important PCI config data. */
iobase = pci_conf_read(config_id, PN_PCI_LOIO);
membase = pci_conf_read(config_id, PN_PCI_LOMEM);
irq = pci_conf_read(config_id, PN_PCI_INTLINE);
/* Reset the power state. */
printf("pn%d: chip is in D%d power mode "
"-- setting to D0\n", unit, command & PN_PSTATE_MASK);
command &= 0xFFFFFFFC;
pci_conf_write(config_id, PN_PCI_PWRMGMTCTRL, command);
/* Restore PCI config data. */
pci_conf_write(config_id, PN_PCI_LOIO, iobase);
pci_conf_write(config_id, PN_PCI_LOMEM, membase);
pci_conf_write(config_id, PN_PCI_INTLINE, irq);
}
}
/*
* Map control/status registers.
*/
command = pci_conf_read(config_id, PCI_COMMAND_STATUS_REG);
command |= (PCIM_CMD_PORTEN|PCIM_CMD_MEMEN|PCIM_CMD_BUSMASTEREN);
pci_conf_write(config_id, PCI_COMMAND_STATUS_REG, command);
command = pci_conf_read(config_id, PCI_COMMAND_STATUS_REG);
#ifdef PN_USEIOSPACE
if (!(command & PCIM_CMD_PORTEN)) {
printf("pn%d: failed to enable I/O ports!\n", unit);
free(sc, M_DEVBUF);
goto fail;
}
if (!pci_map_port(config_id, PN_PCI_LOIO,
(u_short *)&(sc->pn_bhandle))) {
printf ("pn%d: couldn't map ports\n", unit);
goto fail;
}
#ifdef __i386__
sc->pn_btag = I386_BUS_SPACE_IO;
#endif
#ifdef __alpha__
sc->pn_btag = ALPHA_BUS_SPACE_IO;
#endif
#else
if (!(command & PCIM_CMD_MEMEN)) {
printf("pn%d: failed to enable memory mapping!\n", unit);
goto fail;
}
if (!pci_map_mem(config_id, PN_PCI_LOMEM, &vbase, &pbase)) {
printf ("pn%d: couldn't map memory\n", unit);
goto fail;
}
sc->pn_bhandle = vbase;
#ifdef __i386__
sc->pn_btag = I386_BUS_SPACE_MEM;
#endif
#ifdef __alpha__
sc->pn_btag = ALPHA_BUS_SPACE_MEM;
#endif
#endif
/* Allocate interrupt */
if (!pci_map_int(config_id, pn_intr, sc, &net_imask)) {
printf("pn%d: couldn't map interrupt\n", unit);
goto fail;
}
/* Save the cache line size. */
sc->pn_cachesize = pci_conf_read(config_id, PN_PCI_CACHELEN) & 0xFF;
/* Reset the adapter. */
pn_reset(sc);
/*
* Get station address from the EEPROM.
*/
pn_read_eeprom(sc, (caddr_t)&eaddr, 0, 3, 1);
/*
* A PNIC chip was detected. Inform the world.
*/
printf("pn%d: Ethernet address: %6D\n", unit, eaddr, ":");
sc->pn_unit = unit;
bcopy(eaddr, (char *)&sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
sc->pn_ldata_ptr = malloc(sizeof(struct pn_list_data) + 8,
M_DEVBUF, M_NOWAIT);
if (sc->pn_ldata_ptr == NULL) {
free(sc, M_DEVBUF);
printf("pn%d: no memory for list buffers!\n", unit);
goto fail;
}
sc->pn_ldata = (struct pn_list_data *)sc->pn_ldata_ptr;
round = (unsigned int)sc->pn_ldata_ptr & 0xF;
roundptr = sc->pn_ldata_ptr;
for (i = 0; i < 8; i++) {
if (round % 8) {
round++;
roundptr++;
} else
break;
}
sc->pn_ldata = (struct pn_list_data *)roundptr;
bzero(sc->pn_ldata, sizeof(struct pn_list_data));
#ifdef PN_RX_BUG_WAR
revision = pci_conf_read(config_id, PN_PCI_REVISION) & 0x000000FF;
if (revision == PN_169B_REV || revision == PN_169_REV ||
(revision & 0xF0) == PN_168_REV) {
sc->pn_rx_war = 1;
sc->pn_rx_buf = malloc(PN_RXLEN * 5, M_DEVBUF, M_NOWAIT);
if (sc->pn_rx_buf == NULL) {
printf("pn%d: no memory for workaround buffer\n", unit);
goto fail;
}
} else {
sc->pn_rx_war = 0;
}
#endif
ifp = &sc->arpcom.ac_if;
ifp->if_softc = sc;
ifp->if_unit = unit;
ifp->if_name = "pn";
ifp->if_mtu = ETHERMTU;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = pn_ioctl;
ifp->if_output = ether_output;
ifp->if_start = pn_start;
ifp->if_watchdog = pn_watchdog;
ifp->if_init = pn_init;
ifp->if_baudrate = 10000000;
ifp->if_snd.ifq_maxlen = PN_TX_LIST_CNT - 1;
ifmedia_init(&sc->ifmedia, 0, pn_ifmedia_upd, pn_ifmedia_sts);
if (bootverbose)
printf("pn%d: probing for a PHY\n", sc->pn_unit);
for (i = PN_PHYADDR_MIN; i < PN_PHYADDR_MAX + 1; i++) {
if (bootverbose)
printf("pn%d: checking address: %d\n",
sc->pn_unit, i);
sc->pn_phy_addr = i;
pn_phy_writereg(sc, PHY_BMCR, PHY_BMCR_RESET);
DELAY(500);
while(pn_phy_readreg(sc, PHY_BMCR)
& PHY_BMCR_RESET);
if ((phy_sts = pn_phy_readreg(sc, PHY_BMSR)))
break;
}
if (phy_sts) {
phy_vid = pn_phy_readreg(sc, PHY_VENID);
phy_did = pn_phy_readreg(sc, PHY_DEVID);
if (bootverbose)
printf("pn%d: found PHY at address %d, ",
sc->pn_unit, sc->pn_phy_addr);
if (bootverbose)
printf("vendor id: %x device id: %x\n",
phy_vid, phy_did);
p = pn_phys;
while(p->pn_vid) {
if (phy_vid == p->pn_vid &&
(phy_did | 0x000F) == p->pn_did) {
sc->pn_pinfo = p;
break;
}
p++;
}
if (sc->pn_pinfo == NULL)
sc->pn_pinfo = &pn_phys[PHY_UNKNOWN];
if (bootverbose)
printf("pn%d: PHY type: %s\n",
sc->pn_unit, sc->pn_pinfo->pn_name);
pn_getmode_mii(sc);
pn_autoneg_mii(sc, PN_FLAG_FORCEDELAY, 1);
} else {
ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T, 0, NULL);
ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T|IFM_HDX, 0, NULL);
ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T|IFM_FDX, 0, NULL);
ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_100_TX, 0, NULL);
ifmedia_add(&sc->ifmedia,
IFM_ETHER|IFM_100_TX|IFM_HDX, 0, NULL);
ifmedia_add(&sc->ifmedia,
IFM_ETHER|IFM_100_TX|IFM_FDX, 0, NULL);
ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_100_T4, 0, NULL);
ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_AUTO, 0, NULL);
pn_autoneg(sc, PN_FLAG_FORCEDELAY, 1);
}
media = sc->ifmedia.ifm_media;
pn_stop(sc);
ifmedia_set(&sc->ifmedia, media);
/*
* Call MI attach routines.
*/
if_attach(ifp);
ether_ifattach(ifp);
#if NBPFILTER > 0
bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header));
#endif
at_shutdown(pn_shutdown, sc, SHUTDOWN_POST_SYNC);
fail:
splx(s);
return;
}
/*
* Initialize the transmit descriptors.
*/
static int pn_list_tx_init(sc)
struct pn_softc *sc;
{
struct pn_chain_data *cd;
struct pn_list_data *ld;
int i;
cd = &sc->pn_cdata;
ld = sc->pn_ldata;
for (i = 0; i < PN_TX_LIST_CNT; i++) {
cd->pn_tx_chain[i].pn_ptr = &ld->pn_tx_list[i];
if (i == (PN_TX_LIST_CNT - 1))
cd->pn_tx_chain[i].pn_nextdesc =
&cd->pn_tx_chain[0];
else
cd->pn_tx_chain[i].pn_nextdesc =
&cd->pn_tx_chain[i + 1];
}
cd->pn_tx_free = &cd->pn_tx_chain[0];
cd->pn_tx_tail = cd->pn_tx_head = NULL;
return(0);
}
/*
* Initialize the RX descriptors and allocate mbufs for them. Note that
* we arrange the descriptors in a closed ring, so that the last descriptor
* points back to the first.
*/
static int pn_list_rx_init(sc)
struct pn_softc *sc;
{
struct pn_chain_data *cd;
struct pn_list_data *ld;
int i;
cd = &sc->pn_cdata;
ld = sc->pn_ldata;
for (i = 0; i < PN_RX_LIST_CNT; i++) {
cd->pn_rx_chain[i].pn_ptr =
(struct pn_desc *)&ld->pn_rx_list[i];
if (pn_newbuf(sc, &cd->pn_rx_chain[i]) == ENOBUFS)
return(ENOBUFS);
if (i == (PN_RX_LIST_CNT - 1)) {
cd->pn_rx_chain[i].pn_nextdesc = &cd->pn_rx_chain[0];
ld->pn_rx_list[i].pn_next =
vtophys(&ld->pn_rx_list[0]);
} else {
cd->pn_rx_chain[i].pn_nextdesc = &cd->pn_rx_chain[i + 1];
ld->pn_rx_list[i].pn_next =
vtophys(&ld->pn_rx_list[i + 1]);
}
}
cd->pn_rx_head = &cd->pn_rx_chain[0];
return(0);
}
/*
* Initialize an RX descriptor and attach an MBUF cluster.
* Note: the length fields are only 11 bits wide, which means the
* largest size we can specify is 2047. This is important because
* MCLBYTES is 2048, so we have to subtract one otherwise we'll
* overflow the field and make a mess.
*/
static int pn_newbuf(sc, c)
struct pn_softc *sc;
struct pn_chain_onefrag *c;
{
struct mbuf *m_new = NULL;
MGETHDR(m_new, M_DONTWAIT, MT_DATA);
if (m_new == NULL) {
printf("pn%d: no memory for rx list -- packet dropped!\n",
sc->pn_unit);
return(ENOBUFS);
}
MCLGET(m_new, M_DONTWAIT);
if (!(m_new->m_flags & M_EXT)) {
printf("pn%d: no memory for rx list -- packet dropped!\n",
sc->pn_unit);
m_freem(m_new);
return(ENOBUFS);
}
/*
* Zero the buffer. This is part of the workaround for the
* promiscuous mode bug in the revision 33 PNIC chips.
*/
bzero((char *)mtod(m_new, char *), MCLBYTES);
m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
c->pn_mbuf = m_new;
c->pn_ptr->pn_status = PN_RXSTAT;
c->pn_ptr->pn_data = vtophys(mtod(m_new, caddr_t));
c->pn_ptr->pn_ctl = PN_RXCTL_RLINK | PN_RXLEN;
return(0);
}
#ifdef PN_RX_BUG_WAR
/*
* Grrrrr.
* The PNIC chip has a terrible bug in it that manifests itself during
* periods of heavy activity. The exact mode of failure if difficult to
* pinpoint: sometimes it only happens in promiscuous mode, sometimes it
* will happen on slow machines. The bug is that sometimes instead of
* uploading one complete frame during reception, it uploads what looks
* like the entire contents of its FIFO memory. The frame we want is at
* the end of the whole mess, but we never know exactly how much data has
* been uploaded, so salvaging the frame is hard.
*
* There is only one way to do it reliably, and it's disgusting.
* Here's what we know:
*
* - We know there will always be somewhere between one and three extra
* descriptors uploaded.
*
* - We know the desired received frame will always be at the end of the
* total data upload.
*
* - We know the size of the desired received frame because it will be
* provided in the length field of the status word in the last descriptor.
*
* Here's what we do:
*
* - When we allocate buffers for the receive ring, we bzero() them.
* This means that we know that the buffer contents should be all
* zeros, except for data uploaded by the chip.
*
* - We also force the PNIC chip to upload frames that include the
* ethernet CRC at the end.
*
* - We gather all of the bogus frame data into a single buffer.
*
* - We then position a pointer at the end of this buffer and scan
* backwards until we encounter the first non-zero byte of data.
* This is the end of the received frame. We know we will encounter
* some data at the end of the frame because the CRC will always be
* there, so even if the sender transmits a packet of all zeros,
* we won't be fooled.
*
* - We know the size of the actual received frame, so we subtract
* that value from the current pointer location. This brings us
* to the start of the actual received packet.
*
* - We copy this into an mbuf and pass it on, along with the actual
* frame length.
*
* The performance hit is tremendous, but it beats dropping frames all
* the time.
*/
#define PN_WHOLEFRAME (PN_RXSTAT_FIRSTFRAG|PN_RXSTAT_LASTFRAG)
static void pn_rx_bug_war(sc, cur_rx)
struct pn_softc *sc;
struct pn_chain_onefrag *cur_rx;
{
struct pn_chain_onefrag *c;
unsigned char *ptr;
int total_len;
u_int32_t rxstat = 0;
c = sc->pn_rx_bug_save;
ptr = sc->pn_rx_buf;
bzero(ptr, sizeof(PN_RXLEN * 5));
/* Copy all the bytes from the bogus buffers. */
while ((c->pn_ptr->pn_status & PN_WHOLEFRAME) != PN_WHOLEFRAME) {
rxstat = c->pn_ptr->pn_status;
m_copydata(c->pn_mbuf, 0, PN_RXLEN, ptr);
ptr += PN_RXLEN - 2; /* round down to 32-bit boundary */
if (c == cur_rx)
break;
if (rxstat & PN_RXSTAT_LASTFRAG)
break;
c->pn_ptr->pn_status = PN_RXSTAT;
c->pn_ptr->pn_ctl = PN_RXCTL_RLINK | PN_RXLEN;
bzero((char *)mtod(c->pn_mbuf, char *), MCLBYTES);
c = c->pn_nextdesc;
}
/* Find the length of the actual receive frame. */
total_len = PN_RXBYTES(rxstat);
/* Scan backwards until we hit a non-zero byte. */
while(*ptr == 0x00)
ptr--;
/* Round off. */
if ((u_int32_t)(ptr) & 0x3)
ptr -= 1;
/* Now find the start of the frame. */
ptr -= total_len;
if (ptr < sc->pn_rx_buf)
ptr = sc->pn_rx_buf;
/*
* Now copy the salvaged frame to the last mbuf and fake up
* the status word to make it look like a successful
* frame reception.
*/
m_copyback(cur_rx->pn_mbuf, 0, total_len, ptr);
cur_rx->pn_mbuf->m_len = c->pn_mbuf->m_pkthdr.len = MCLBYTES;
cur_rx->pn_ptr->pn_status |= PN_RXSTAT_FIRSTFRAG;
return;
}
#endif
/*
* A frame has been uploaded: pass the resulting mbuf chain up to
* the higher level protocols.
*/
static void pn_rxeof(sc)
struct pn_softc *sc;
{
struct ether_header *eh;
struct mbuf *m;
struct ifnet *ifp;
struct pn_chain_onefrag *cur_rx;
int total_len = 0;
u_int32_t rxstat;
ifp = &sc->arpcom.ac_if;
while(!((rxstat = sc->pn_cdata.pn_rx_head->pn_ptr->pn_status) &
PN_RXSTAT_OWN)) {
#ifdef __alpha__
struct mbuf *m0 = NULL;
#endif
cur_rx = sc->pn_cdata.pn_rx_head;
sc->pn_cdata.pn_rx_head = cur_rx->pn_nextdesc;
#ifdef PN_RX_BUG_WAR
/*
* XXX The PNIC has a nasty receiver bug that manifests
* under certain conditions (sometimes only in promiscuous
* mode, sometimes only on slow machines even when not in
* promiscuous mode). We have to keep an eye out for the
* failure condition and employ a workaround to recover
* any mangled frames.
*/
if (sc->pn_rx_war) {
if ((rxstat & PN_WHOLEFRAME) != PN_WHOLEFRAME) {
if (rxstat & PN_RXSTAT_FIRSTFRAG)
sc->pn_rx_bug_save = cur_rx;
if ((rxstat & PN_RXSTAT_LASTFRAG) == 0)
continue;
pn_rx_bug_war(sc, cur_rx);
rxstat = cur_rx->pn_ptr->pn_status;
}
}
#endif
/*
* If an error occurs, update stats, clear the
* status word and leave the mbuf cluster in place:
* it should simply get re-used next time this descriptor
* comes up in the ring.
*/
if (rxstat & PN_RXSTAT_RXERR) {
ifp->if_ierrors++;
if (rxstat & PN_RXSTAT_COLLSEEN)
ifp->if_collisions++;
cur_rx->pn_ptr->pn_status = PN_RXSTAT;
cur_rx->pn_ptr->pn_ctl = PN_RXCTL_RLINK | PN_RXLEN;
bzero((char *)mtod(cur_rx->pn_mbuf, char *), MCLBYTES);
continue;
}
/* No errors; receive the packet. */
m = cur_rx->pn_mbuf;
total_len = PN_RXBYTES(cur_rx->pn_ptr->pn_status);
/* Trim off the CRC. */
total_len -= ETHER_CRC_LEN;
/*
* Try to conjure up a new mbuf cluster. If that
* fails, it means we have an out of memory condition and
* should leave the buffer in place and continue. This will
* result in a lost packet, but there's little else we
* can do in this situation.
*/
if (pn_newbuf(sc, cur_rx) == ENOBUFS) {
ifp->if_ierrors++;
cur_rx->pn_ptr->pn_status = PN_RXSTAT;
cur_rx->pn_ptr->pn_ctl = PN_RXCTL_RLINK | PN_RXLEN;
bzero((char *)mtod(cur_rx->pn_mbuf, char *), MCLBYTES);
continue;
}
#ifdef __alpha__
/*
* Grrrr! On the alpha platform, the start of the
* packet data must be longword aligned so that ip_input()
* doesn't perform any unaligned accesses when it tries
* to fiddle with the IP header. But the PNIC is stupid
* and wants RX buffers to start on longword boundaries.
* So we can't just shift the DMA address over a few
* bytes to alter the payload alignment. Instead, we
* have to chop out ethernet and IP header parts of
* the packet and place then in a separate mbuf with
* the alignment fixed up properly.
*
* As if this chip wasn't broken enough already.
*/
MGETHDR(m0, M_DONTWAIT, MT_DATA);
if (m0 == NULL) {
ifp->if_ierrors++;
cur_rx->pn_ptr->pn_status = PN_RXSTAT;
cur_rx->pn_ptr->pn_ctl = PN_RXCTL_RLINK | PN_RXLEN;
bzero((char *)mtod(cur_rx->pn_mbuf, char *), MCLBYTES);
continue;
}
m0->m_data += 2;
if (total_len <= (MHLEN - 2)) {
bcopy(mtod(m, caddr_t), mtod(m0, caddr_t), total_len);
m_freem(m);
m = m0;
m->m_pkthdr.len = m->m_len = total_len;
} else {
bcopy(mtod(m, caddr_t), mtod(m0, caddr_t), (MHLEN - 2));
m->m_len = total_len - (MHLEN - 2);
m->m_data += (MHLEN - 2);
m0->m_next = m;
m0->m_len = (MHLEN - 2);
m = m0;
m->m_pkthdr.len = total_len;
}
#else
m->m_pkthdr.len = m->m_len = total_len;
#endif
ifp->if_ipackets++;
eh = mtod(m, struct ether_header *);
m->m_pkthdr.rcvif = ifp;
#if NBPFILTER > 0
/*
* Handle BPF listeners. Let the BPF user see the packet, but
* don't pass it up to the ether_input() layer unless it's
* a broadcast packet, multicast packet, matches our ethernet
* address or the interface is in promiscuous mode.
*/
if (ifp->if_bpf) {
bpf_mtap(ifp, m);
if (ifp->if_flags & IFF_PROMISC &&
(bcmp(eh->ether_dhost, sc->arpcom.ac_enaddr,
ETHER_ADDR_LEN) &&
(eh->ether_dhost[0] & 1) == 0)) {
m_freem(m);
continue;
}
}
#endif
/* Remove header from mbuf and pass it on. */
m_adj(m, sizeof(struct ether_header));
ether_input(ifp, eh, m);
}
return;
}
void pn_rxeoc(sc)
struct pn_softc *sc;
{
pn_rxeof(sc);
PN_CLRBIT(sc, PN_NETCFG, PN_NETCFG_RX_ON);
CSR_WRITE_4(sc, PN_RXADDR, vtophys(sc->pn_cdata.pn_rx_head->pn_ptr));
PN_SETBIT(sc, PN_NETCFG, PN_NETCFG_RX_ON);
CSR_WRITE_4(sc, PN_RXSTART, 0xFFFFFFFF);
return;
}
/*
* A frame was downloaded to the chip. It's safe for us to clean up
* the list buffers.
*/
static void pn_txeof(sc)
struct pn_softc *sc;
{
struct pn_chain *cur_tx;
struct ifnet *ifp;
ifp = &sc->arpcom.ac_if;
/* Clear the timeout timer. */
ifp->if_timer = 0;
if (sc->pn_cdata.pn_tx_head == NULL)
return;
/*
* Go through our tx list and free mbufs for those
* frames that have been transmitted.
*/
while(sc->pn_cdata.pn_tx_head->pn_mbuf != NULL) {
u_int32_t txstat;
cur_tx = sc->pn_cdata.pn_tx_head;
txstat = PN_TXSTATUS(cur_tx);
if (txstat & PN_TXSTAT_OWN)
break;
if (txstat & PN_TXSTAT_ERRSUM) {
ifp->if_oerrors++;
if (txstat & PN_TXSTAT_EXCESSCOLL)
ifp->if_collisions++;
if (txstat & PN_TXSTAT_LATECOLL)
ifp->if_collisions++;
}
ifp->if_collisions += (txstat & PN_TXSTAT_COLLCNT) >> 3;
ifp->if_opackets++;
m_freem(cur_tx->pn_mbuf);
cur_tx->pn_mbuf = NULL;
if (sc->pn_cdata.pn_tx_head == sc->pn_cdata.pn_tx_tail) {
sc->pn_cdata.pn_tx_head = NULL;
sc->pn_cdata.pn_tx_tail = NULL;
break;
}
sc->pn_cdata.pn_tx_head = cur_tx->pn_nextdesc;
}
return;
}
/*
* TX 'end of channel' interrupt handler.
*/
static void pn_txeoc(sc)
struct pn_softc *sc;
{
struct ifnet *ifp;
ifp = &sc->arpcom.ac_if;
ifp->if_timer = 0;
if (sc->pn_cdata.pn_tx_head == NULL) {
ifp->if_flags &= ~IFF_OACTIVE;
sc->pn_cdata.pn_tx_tail = NULL;
if (sc->pn_want_auto) {
if (sc->pn_pinfo == NULL)
pn_autoneg(sc, PN_FLAG_SCHEDDELAY, 1);
else
pn_autoneg_mii(sc, PN_FLAG_SCHEDDELAY, 1);
}
}
return;
}
static void pn_intr(arg)
void *arg;
{
struct pn_softc *sc;
struct ifnet *ifp;
u_int32_t status;
sc = arg;
ifp = &sc->arpcom.ac_if;
/* Supress unwanted interrupts. */
if (!(ifp->if_flags & IFF_UP)) {
pn_stop(sc);
return;
}
/* Disable interrupts. */
CSR_WRITE_4(sc, PN_IMR, 0x00000000);
for (;;) {
status = CSR_READ_4(sc, PN_ISR);
if (status)
CSR_WRITE_4(sc, PN_ISR, status);
if ((status & PN_INTRS) == 0)
break;
if (status & PN_ISR_RX_OK)
pn_rxeof(sc);
if ((status & PN_ISR_RX_WATCHDOG) || (status & PN_ISR_RX_IDLE)
|| (status & PN_ISR_RX_NOBUF))
pn_rxeoc(sc);
if (status & PN_ISR_TX_OK)
pn_txeof(sc);
if (status & PN_ISR_TX_NOBUF)
pn_txeoc(sc);
if (status & PN_ISR_TX_IDLE) {
pn_txeof(sc);
if (sc->pn_cdata.pn_tx_head != NULL) {
PN_SETBIT(sc, PN_NETCFG, PN_NETCFG_TX_ON);
CSR_WRITE_4(sc, PN_TXSTART, 0xFFFFFFFF);
}
}
if (status & PN_ISR_TX_UNDERRUN) {
ifp->if_oerrors++;
pn_txeof(sc);
if (sc->pn_cdata.pn_tx_head != NULL) {
PN_SETBIT(sc, PN_NETCFG, PN_NETCFG_TX_ON);
CSR_WRITE_4(sc, PN_TXSTART, 0xFFFFFFFF);
}
}
if (status & PN_ISR_BUS_ERR) {
pn_reset(sc);
pn_init(sc);
}
}
/* Re-enable interrupts. */
CSR_WRITE_4(sc, PN_IMR, PN_INTRS);
if (ifp->if_snd.ifq_head != NULL) {
pn_start(ifp);
}
return;
}
/*
* Encapsulate an mbuf chain in a descriptor by coupling the mbuf data
* pointers to the fragment pointers.
*/
static int pn_encap(sc, c, m_head)
struct pn_softc *sc;
struct pn_chain *c;
struct mbuf *m_head;
{
int frag = 0;
struct pn_desc *f = NULL;
int total_len;
struct mbuf *m;
/*
* Start packing the mbufs in this chain into
* the fragment pointers. Stop when we run out
* of fragments or hit the end of the mbuf chain.
*/
m = m_head;
total_len = 0;
for (m = m_head, frag = 0; m != NULL; m = m->m_next) {
if (m->m_len != 0) {
if (frag == PN_MAXFRAGS)
break;
total_len += m->m_len;
f = &c->pn_ptr->pn_frag[frag];
f->pn_ctl = PN_TXCTL_TLINK | m->m_len;
if (frag == 0) {
f->pn_ctl |= PN_TXCTL_FIRSTFRAG;
f->pn_status = 0;
} else
f->pn_status = PN_TXSTAT_OWN;
f->pn_data = vtophys(mtod(m, vm_offset_t));
f->pn_next = vtophys(&c->pn_ptr->pn_frag[frag + 1]);
frag++;
}
}
/*
* Handle special case: we used up all 16 fragments,
* but we have more mbufs left in the chain. Copy the
* data into an mbuf cluster. Note that we don't
* bother clearing the values in the other fragment
* pointers/counters; it wouldn't gain us anything,
* and would waste cycles.
*/
if (m != NULL) {
struct mbuf *m_new = NULL;
MGETHDR(m_new, M_DONTWAIT, MT_DATA);
if (m_new == NULL) {
printf("pn%d: no memory for tx list", sc->pn_unit);
return(1);
}
if (m_head->m_pkthdr.len > MHLEN) {
MCLGET(m_new, M_DONTWAIT);
if (!(m_new->m_flags & M_EXT)) {
m_freem(m_new);
printf("pn%d: no memory for tx list",
sc->pn_unit);
return(1);
}
}
m_copydata(m_head, 0, m_head->m_pkthdr.len,
mtod(m_new, caddr_t));
m_new->m_pkthdr.len = m_new->m_len = m_head->m_pkthdr.len;
m_freem(m_head);
m_head = m_new;
f = &c->pn_ptr->pn_frag[0];
f->pn_data = vtophys(mtod(m_new, caddr_t));
f->pn_ctl = total_len = m_new->m_len;
f->pn_ctl |= PN_TXCTL_TLINK|PN_TXCTL_FIRSTFRAG;
frag = 1;
}
c->pn_mbuf = m_head;
c->pn_lastdesc = frag - 1;
PN_TXCTL(c) |= PN_TXCTL_LASTFRAG|PN_TXCTL_FINT;
PN_TXNEXT(c) = vtophys(&c->pn_nextdesc->pn_ptr->pn_frag[0]);
return(0);
}
/*
* Main transmit routine. To avoid having to do mbuf copies, we put pointers
* to the mbuf data regions directly in the transmit lists. We also save a
* copy of the pointers since the transmit list fragment pointers are
* physical addresses.
*/
static void pn_start(ifp)
struct ifnet *ifp;
{
struct pn_softc *sc;
struct mbuf *m_head = NULL;
struct pn_chain *cur_tx = NULL, *start_tx;
sc = ifp->if_softc;
if (sc->pn_autoneg) {
sc->pn_tx_pend = 1;
return;
}
/*
* Check for an available queue slot. If there are none,
* punt.
*/
if (sc->pn_cdata.pn_tx_free->pn_mbuf != NULL) {
ifp->if_flags |= IFF_OACTIVE;
return;
}
start_tx = sc->pn_cdata.pn_tx_free;
while(sc->pn_cdata.pn_tx_free->pn_mbuf == NULL) {
IF_DEQUEUE(&ifp->if_snd, m_head);
if (m_head == NULL)
break;
/* Pick a descriptor off the free list. */
cur_tx = sc->pn_cdata.pn_tx_free;
sc->pn_cdata.pn_tx_free = cur_tx->pn_nextdesc;
/* Pack the data into the descriptor. */
pn_encap(sc, cur_tx, m_head);
if (cur_tx != start_tx)
PN_TXOWN(cur_tx) = PN_TXSTAT_OWN;
#if NBPFILTER > 0
/*
* If there's a BPF listener, bounce a copy of this frame
* to him.
*/
if (ifp->if_bpf)
bpf_mtap(ifp, cur_tx->pn_mbuf);
#endif
PN_TXOWN(cur_tx) = PN_TXSTAT_OWN;
CSR_WRITE_4(sc, PN_TXSTART, 0xFFFFFFFF);
}
/*
* If there are no packets queued, bail.
*/
if (cur_tx == NULL)
return;
sc->pn_cdata.pn_tx_tail = cur_tx;
if (sc->pn_cdata.pn_tx_head == NULL)
sc->pn_cdata.pn_tx_head = start_tx;
/*
* Set a timeout in case the chip goes out to lunch.
*/
ifp->if_timer = 5;
return;
}
static void pn_init(xsc)
void *xsc;
{
struct pn_softc *sc = xsc;
struct ifnet *ifp = &sc->arpcom.ac_if;
u_int16_t phy_bmcr = 0;
int s;
if (sc->pn_autoneg)
return;
s = splimp();
if (sc->pn_pinfo != NULL)
phy_bmcr = pn_phy_readreg(sc, PHY_BMCR);
/*
* Cancel pending I/O and free all RX/TX buffers.
*/
pn_stop(sc);
pn_reset(sc);
/*
* Set cache alignment and burst length.
*/
CSR_WRITE_4(sc, PN_BUSCTL, PN_BUSCTL_MUSTBEONE|PN_BUSCTL_ARBITRATION);
PN_SETBIT(sc, PN_BUSCTL, PN_BURSTLEN_16LONG);
switch(sc->pn_cachesize) {
case 32:
PN_SETBIT(sc, PN_BUSCTL, PN_CACHEALIGN_32LONG);
break;
case 16:
PN_SETBIT(sc, PN_BUSCTL, PN_CACHEALIGN_16LONG);
break;
case 8:
PN_SETBIT(sc, PN_BUSCTL, PN_CACHEALIGN_8LONG);
break;
case 0:
default:
PN_SETBIT(sc, PN_BUSCTL, PN_CACHEALIGN_NONE);
break;
}
PN_CLRBIT(sc, PN_NETCFG, PN_NETCFG_TX_IMMEDIATE);
PN_CLRBIT(sc, PN_NETCFG, PN_NETCFG_NO_RXCRC);
PN_CLRBIT(sc, PN_NETCFG, PN_NETCFG_HEARTBEAT);
PN_CLRBIT(sc, PN_NETCFG, PN_NETCFG_STORENFWD);
PN_CLRBIT(sc, PN_NETCFG, PN_NETCFG_TX_BACKOFF);
PN_CLRBIT(sc, PN_NETCFG, PN_NETCFG_TX_THRESH);
PN_SETBIT(sc, PN_NETCFG, PN_TXTHRESH_72BYTES);
if (sc->pn_pinfo == NULL) {
PN_CLRBIT(sc, PN_NETCFG, PN_NETCFG_MIIENB);
PN_SETBIT(sc, PN_NETCFG, PN_NETCFG_TX_BACKOFF);
} else {
PN_SETBIT(sc, PN_NETCFG, PN_NETCFG_MIIENB);
PN_SETBIT(sc, PN_ENDEC, PN_ENDEC_JABBERDIS);
}
pn_setcfg(sc, sc->ifmedia.ifm_media);
/* Init circular RX list. */
if (pn_list_rx_init(sc) == ENOBUFS) {
printf("pn%d: initialization failed: no "
"memory for rx buffers\n", sc->pn_unit);
pn_stop(sc);
(void)splx(s);
return;
}
/*
* Init tx descriptors.
*/
pn_list_tx_init(sc);
/*
* Load the address of the RX list.
*/
CSR_WRITE_4(sc, PN_RXADDR, vtophys(sc->pn_cdata.pn_rx_head->pn_ptr));
/*
* Load the RX/multicast filter.
*/
pn_setfilt(sc);
/*
* Enable interrupts.
*/
CSR_WRITE_4(sc, PN_IMR, PN_INTRS);
CSR_WRITE_4(sc, PN_ISR, 0xFFFFFFFF);
/* Enable receiver and transmitter. */
PN_SETBIT(sc, PN_NETCFG, PN_NETCFG_TX_ON|PN_NETCFG_RX_ON);
CSR_WRITE_4(sc, PN_RXSTART, 0xFFFFFFFF);
/* Restore state of BMCR */
if (sc->pn_pinfo != NULL)
pn_phy_writereg(sc, PHY_BMCR, phy_bmcr);
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
(void)splx(s);
return;
}
/*
* Set media options.
*/
static int pn_ifmedia_upd(ifp)
struct ifnet *ifp;
{
struct pn_softc *sc;
struct ifmedia *ifm;
sc = ifp->if_softc;
ifm = &sc->ifmedia;
if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
return(EINVAL);
if (IFM_SUBTYPE(ifm->ifm_media) == IFM_AUTO) {
if (sc->pn_pinfo == NULL)
pn_autoneg(sc, PN_FLAG_SCHEDDELAY, 1);
else
pn_autoneg_mii(sc, PN_FLAG_SCHEDDELAY, 1);
} else {
if (sc->pn_pinfo == NULL)
pn_setmode(sc, ifm->ifm_media);
else
pn_setmode_mii(sc, ifm->ifm_media);
}
return(0);
}
/*
* Report current media status.
*/
static void pn_ifmedia_sts(ifp, ifmr)
struct ifnet *ifp;
struct ifmediareq *ifmr;
{
struct pn_softc *sc;
u_int16_t advert = 0, ability = 0;
sc = ifp->if_softc;
ifmr->ifm_active = IFM_ETHER;
if (sc->pn_pinfo == NULL) {
if (CSR_READ_4(sc, PN_NETCFG) & PN_NETCFG_SPEEDSEL)
ifmr->ifm_active = IFM_ETHER|IFM_10_T;
else
ifmr->ifm_active = IFM_ETHER|IFM_100_TX;
if (CSR_READ_4(sc, PN_NETCFG) & PN_NETCFG_FULLDUPLEX)
ifmr->ifm_active |= IFM_FDX;
else
ifmr->ifm_active |= IFM_HDX;
return;
}
if (!(pn_phy_readreg(sc, PHY_BMCR) & PHY_BMCR_AUTONEGENBL)) {
if (pn_phy_readreg(sc, PHY_BMCR) & PHY_BMCR_SPEEDSEL)
ifmr->ifm_active = IFM_ETHER|IFM_100_TX;
else
ifmr->ifm_active = IFM_ETHER|IFM_10_T;
if (pn_phy_readreg(sc, PHY_BMCR) & PHY_BMCR_DUPLEX)
ifmr->ifm_active |= IFM_FDX;
else
ifmr->ifm_active |= IFM_HDX;
return;
}
ability = pn_phy_readreg(sc, PHY_LPAR);
advert = pn_phy_readreg(sc, PHY_ANAR);
if (advert & PHY_ANAR_100BT4 &&
ability & PHY_ANAR_100BT4) {
ifmr->ifm_active = IFM_ETHER|IFM_100_T4;
} else if (advert & PHY_ANAR_100BTXFULL &&
ability & PHY_ANAR_100BTXFULL) {
ifmr->ifm_active = IFM_ETHER|IFM_100_TX|IFM_FDX;
} else if (advert & PHY_ANAR_100BTXHALF &&
ability & PHY_ANAR_100BTXHALF) {
ifmr->ifm_active = IFM_ETHER|IFM_100_TX|IFM_HDX;
} else if (advert & PHY_ANAR_10BTFULL &&
ability & PHY_ANAR_10BTFULL) {
ifmr->ifm_active = IFM_ETHER|IFM_10_T|IFM_FDX;
} else if (advert & PHY_ANAR_10BTHALF &&
ability & PHY_ANAR_10BTHALF) {
ifmr->ifm_active = IFM_ETHER|IFM_10_T|IFM_HDX;
}
return;
}
static int pn_ioctl(ifp, command, data)
struct ifnet *ifp;
u_long command;
caddr_t data;
{
struct pn_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *) data;
int s, error = 0;
s = splimp();
switch(command) {
case SIOCSIFADDR:
case SIOCGIFADDR:
case SIOCSIFMTU:
error = ether_ioctl(ifp, command, data);
break;
case SIOCSIFFLAGS:
if (ifp->if_flags & IFF_UP) {
pn_init(sc);
} else {
if (ifp->if_flags & IFF_RUNNING)
pn_stop(sc);
}
error = 0;
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
pn_init(sc);
error = 0;
break;
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &sc->ifmedia, command);
break;
default:
error = EINVAL;
break;
}
(void)splx(s);
return(error);
}
static void pn_watchdog(ifp)
struct ifnet *ifp;
{
struct pn_softc *sc;
sc = ifp->if_softc;
if (sc->pn_autoneg) {
if (sc->pn_pinfo == NULL)
pn_autoneg(sc, PN_FLAG_DELAYTIMEO, 1);
else
pn_autoneg_mii(sc, PN_FLAG_DELAYTIMEO, 1);
return;
}
ifp->if_oerrors++;
printf("pn%d: watchdog timeout\n", sc->pn_unit);
if (!(pn_phy_readreg(sc, PHY_BMSR) & PHY_BMSR_LINKSTAT))
printf("pn%d: no carrier - transceiver cable problem?\n",
sc->pn_unit);
pn_stop(sc);
pn_reset(sc);
pn_init(sc);
if (ifp->if_snd.ifq_head != NULL)
pn_start(ifp);
return;
}
/*
* Stop the adapter and free any mbufs allocated to the
* RX and TX lists.
*/
static void pn_stop(sc)
struct pn_softc *sc;
{
register int i;
struct ifnet *ifp;
ifp = &sc->arpcom.ac_if;
ifp->if_timer = 0;
PN_CLRBIT(sc, PN_NETCFG, (PN_NETCFG_RX_ON|PN_NETCFG_TX_ON));
CSR_WRITE_4(sc, PN_IMR, 0x00000000);
CSR_WRITE_4(sc, PN_TXADDR, 0x00000000);
CSR_WRITE_4(sc, PN_RXADDR, 0x00000000);
/*
* Free data in the RX lists.
*/
for (i = 0; i < PN_RX_LIST_CNT; i++) {
if (sc->pn_cdata.pn_rx_chain[i].pn_mbuf != NULL) {
m_freem(sc->pn_cdata.pn_rx_chain[i].pn_mbuf);
sc->pn_cdata.pn_rx_chain[i].pn_mbuf = NULL;
}
}
bzero((char *)&sc->pn_ldata->pn_rx_list,
sizeof(sc->pn_ldata->pn_rx_list));
/*
* Free the TX list buffers.
*/
for (i = 0; i < PN_TX_LIST_CNT; i++) {
if (sc->pn_cdata.pn_tx_chain[i].pn_mbuf != NULL) {
m_freem(sc->pn_cdata.pn_tx_chain[i].pn_mbuf);
sc->pn_cdata.pn_tx_chain[i].pn_mbuf = NULL;
}
}
bzero((char *)&sc->pn_ldata->pn_tx_list,
sizeof(sc->pn_ldata->pn_tx_list));
ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
return;
}
/*
* Stop all chip I/O so that the kernel's probe routines don't
* get confused by errant DMAs when rebooting.
*/
static void pn_shutdown(howto, arg)
int howto;
void *arg;
{
struct pn_softc *sc = (struct pn_softc *)arg;
pn_stop(sc);
return;
}
static struct pci_device pn_device = {
"pn",
pn_probe,
pn_attach,
&pn_count,
NULL
};
COMPAT_PCI_DRIVER(pn, pn_device);
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