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freebsd-skq/sys/pci/if_ste.c
wpaul 165d81879e As suggested by phk, unconditionalize BPF support in these drivers. Since 
there are stubs compiled into the kernel if BPF support is not enabled,
there aren't any problems with unresolved symbols. The modules in /modules
are compiled with BPF support enabled anyway, so the most this will do is
bloat GENERIC a little.
1999-09-23 03:32:57 +00:00

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/*
* Copyright (c) 1997, 1998, 1999
* 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.
*
* $FreeBSD$
*/
#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>
#include <net/bpf.h>
#include "opt_bdg.h"
#ifdef BRIDGE
#include <net/bridge.h>
#endif
#include <vm/vm.h> /* for vtophys */
#include <vm/pmap.h> /* for vtophys */
#include <machine/clock.h> /* for DELAY */
#include <machine/bus_memio.h>
#include <machine/bus_pio.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <pci/pcireg.h>
#include <pci/pcivar.h>
/* "controller miibus0" required. See GENERIC if you get errors here. */
#include "miibus_if.h"
#define STE_USEIOSPACE
#include <pci/if_stereg.h>
#if !defined(lint)
static const char rcsid[] =
"$FreeBSD$";
#endif
/*
* Various supported device vendors/types and their names.
*/
static struct ste_type ste_devs[] = {
{ ST_VENDORID, ST_DEVICEID_ST201, "Sundance ST201 10/100BaseTX" },
{ DL_VENDORID, DL_DEVICEID_550TX, "D-Link DFE-550TX 10/100BaseTX" },
{ 0, 0, NULL }
};
static int ste_probe __P((device_t));
static int ste_attach __P((device_t));
static int ste_detach __P((device_t));
static void ste_init __P((void *));
static void ste_intr __P((void *));
static void ste_rxeof __P((struct ste_softc *));
static void ste_txeoc __P((struct ste_softc *));
static void ste_txeof __P((struct ste_softc *));
static void ste_stats_update __P((void *));
static void ste_stop __P((struct ste_softc *));
static void ste_reset __P((struct ste_softc *));
static int ste_ioctl __P((struct ifnet *, u_long, caddr_t));
static int ste_encap __P((struct ste_softc *, struct ste_chain *,
struct mbuf *));
static void ste_start __P((struct ifnet *));
static void ste_watchdog __P((struct ifnet *));
static void ste_shutdown __P((device_t));
static int ste_newbuf __P((struct ste_softc *,
struct ste_chain_onefrag *,
struct mbuf *));
static int ste_ifmedia_upd __P((struct ifnet *));
static void ste_ifmedia_sts __P((struct ifnet *, struct ifmediareq *));
static void ste_mii_sync __P((struct ste_softc *));
static void ste_mii_send __P((struct ste_softc *, u_int32_t, int));
static int ste_mii_readreg __P((struct ste_softc *,
struct ste_mii_frame *));
static int ste_mii_writereg __P((struct ste_softc *,
struct ste_mii_frame *));
static int ste_miibus_readreg __P((device_t, int, int));
static int ste_miibus_writereg __P((device_t, int, int, int));
static void ste_miibus_statchg __P((device_t));
static int ste_eeprom_wait __P((struct ste_softc *));
static int ste_read_eeprom __P((struct ste_softc *, caddr_t, int,
int, int));
static void ste_wait __P((struct ste_softc *));
static u_int8_t ste_calchash __P((caddr_t));
static void ste_setmulti __P((struct ste_softc *));
static int ste_init_rx_list __P((struct ste_softc *));
static void ste_init_tx_list __P((struct ste_softc *));
#ifdef STE_USEIOSPACE
#define STE_RES SYS_RES_IOPORT
#define STE_RID STE_PCI_LOIO
#else
#define STE_RES SYS_RES_MEMORY
#define STE_RID STE_PCI_LOMEM
#endif
static device_method_t ste_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ste_probe),
DEVMETHOD(device_attach, ste_attach),
DEVMETHOD(device_detach, ste_detach),
DEVMETHOD(device_shutdown, ste_shutdown),
/* bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_driver_added, bus_generic_driver_added),
/* MII interface */
DEVMETHOD(miibus_readreg, ste_miibus_readreg),
DEVMETHOD(miibus_writereg, ste_miibus_writereg),
DEVMETHOD(miibus_statchg, ste_miibus_statchg),
{ 0, 0 }
};
static driver_t ste_driver = {
"ste",
ste_methods,
sizeof(struct ste_softc)
};
static devclass_t ste_devclass;
DRIVER_MODULE(if_ste, pci, ste_driver, ste_devclass, 0, 0);
DRIVER_MODULE(miibus, ste, miibus_driver, miibus_devclass, 0, 0);
#define STE_SETBIT4(sc, reg, x) \
CSR_WRITE_4(sc, reg, CSR_READ_4(sc, reg) | x)
#define STE_CLRBIT4(sc, reg, x) \
CSR_WRITE_4(sc, reg, CSR_READ_4(sc, reg) & ~x)
#define STE_SETBIT2(sc, reg, x) \
CSR_WRITE_2(sc, reg, CSR_READ_2(sc, reg) | x)
#define STE_CLRBIT2(sc, reg, x) \
CSR_WRITE_2(sc, reg, CSR_READ_2(sc, reg) & ~x)
#define STE_SETBIT1(sc, reg, x) \
CSR_WRITE_1(sc, reg, CSR_READ_1(sc, reg) | x)
#define STE_CLRBIT1(sc, reg, x) \
CSR_WRITE_1(sc, reg, CSR_READ_1(sc, reg) & ~x)
#define MII_SET(x) STE_SETBIT1(sc, STE_PHYCTL, x)
#define MII_CLR(x) STE_CLRBIT1(sc, STE_PHYCTL, x)
/*
* Sync the PHYs by setting data bit and strobing the clock 32 times.
*/
static void ste_mii_sync(sc)
struct ste_softc *sc;
{
register int i;
MII_SET(STE_PHYCTL_MDIR|STE_PHYCTL_MDATA);
for (i = 0; i < 32; i++) {
MII_SET(STE_PHYCTL_MCLK);
DELAY(1);
MII_CLR(STE_PHYCTL_MCLK);
DELAY(1);
}
return;
}
/*
* Clock a series of bits through the MII.
*/
static void ste_mii_send(sc, bits, cnt)
struct ste_softc *sc;
u_int32_t bits;
int cnt;
{
int i;
MII_CLR(STE_PHYCTL_MCLK);
for (i = (0x1 << (cnt - 1)); i; i >>= 1) {
if (bits & i) {
MII_SET(STE_PHYCTL_MDATA);
} else {
MII_CLR(STE_PHYCTL_MDATA);
}
DELAY(1);
MII_CLR(STE_PHYCTL_MCLK);
DELAY(1);
MII_SET(STE_PHYCTL_MCLK);
}
}
/*
* Read an PHY register through the MII.
*/
static int ste_mii_readreg(sc, frame)
struct ste_softc *sc;
struct ste_mii_frame *frame;
{
int i, ack, s;
s = splimp();
/*
* Set up frame for RX.
*/
frame->mii_stdelim = STE_MII_STARTDELIM;
frame->mii_opcode = STE_MII_READOP;
frame->mii_turnaround = 0;
frame->mii_data = 0;
CSR_WRITE_2(sc, STE_PHYCTL, 0);
/*
* Turn on data xmit.
*/
MII_SET(STE_PHYCTL_MDIR);
ste_mii_sync(sc);
/*
* Send command/address info.
*/
ste_mii_send(sc, frame->mii_stdelim, 2);
ste_mii_send(sc, frame->mii_opcode, 2);
ste_mii_send(sc, frame->mii_phyaddr, 5);
ste_mii_send(sc, frame->mii_regaddr, 5);
/* Turn off xmit. */
MII_CLR(STE_PHYCTL_MDIR);
/* Idle bit */
MII_CLR((STE_PHYCTL_MCLK|STE_PHYCTL_MDATA));
DELAY(1);
MII_SET(STE_PHYCTL_MCLK);
DELAY(1);
/* Check for ack */
MII_CLR(STE_PHYCTL_MCLK);
DELAY(1);
MII_SET(STE_PHYCTL_MCLK);
DELAY(1);
ack = CSR_READ_2(sc, STE_PHYCTL) & STE_PHYCTL_MDATA;
/*
* Now try reading data bits. If the ack failed, we still
* need to clock through 16 cycles to keep the PHY(s) in sync.
*/
if (ack) {
for(i = 0; i < 16; i++) {
MII_CLR(STE_PHYCTL_MCLK);
DELAY(1);
MII_SET(STE_PHYCTL_MCLK);
DELAY(1);
}
goto fail;
}
for (i = 0x8000; i; i >>= 1) {
MII_CLR(STE_PHYCTL_MCLK);
DELAY(1);
if (!ack) {
if (CSR_READ_2(sc, STE_PHYCTL) & STE_PHYCTL_MDATA)
frame->mii_data |= i;
DELAY(1);
}
MII_SET(STE_PHYCTL_MCLK);
DELAY(1);
}
fail:
MII_CLR(STE_PHYCTL_MCLK);
DELAY(1);
MII_SET(STE_PHYCTL_MCLK);
DELAY(1);
splx(s);
if (ack)
return(1);
return(0);
}
/*
* Write to a PHY register through the MII.
*/
static int ste_mii_writereg(sc, frame)
struct ste_softc *sc;
struct ste_mii_frame *frame;
{
int s;
s = splimp();
/*
* Set up frame for TX.
*/
frame->mii_stdelim = STE_MII_STARTDELIM;
frame->mii_opcode = STE_MII_WRITEOP;
frame->mii_turnaround = STE_MII_TURNAROUND;
/*
* Turn on data output.
*/
MII_SET(STE_PHYCTL_MDIR);
ste_mii_sync(sc);
ste_mii_send(sc, frame->mii_stdelim, 2);
ste_mii_send(sc, frame->mii_opcode, 2);
ste_mii_send(sc, frame->mii_phyaddr, 5);
ste_mii_send(sc, frame->mii_regaddr, 5);
ste_mii_send(sc, frame->mii_turnaround, 2);
ste_mii_send(sc, frame->mii_data, 16);
/* Idle bit. */
MII_SET(STE_PHYCTL_MCLK);
DELAY(1);
MII_CLR(STE_PHYCTL_MCLK);
DELAY(1);
/*
* Turn off xmit.
*/
MII_CLR(STE_PHYCTL_MDIR);
splx(s);
return(0);
}
static int ste_miibus_readreg(dev, phy, reg)
device_t dev;
int phy, reg;
{
struct ste_softc *sc;
struct ste_mii_frame frame;
sc = device_get_softc(dev);
bzero((char *)&frame, sizeof(frame));
frame.mii_phyaddr = phy;
frame.mii_regaddr = reg;
ste_mii_readreg(sc, &frame);
return(frame.mii_data);
}
static int ste_miibus_writereg(dev, phy, reg, data)
device_t dev;
int phy, reg, data;
{
struct ste_softc *sc;
struct ste_mii_frame frame;
sc = device_get_softc(dev);
bzero((char *)&frame, sizeof(frame));
frame.mii_phyaddr = phy;
frame.mii_regaddr = reg;
frame.mii_data = data;
ste_mii_writereg(sc, &frame);
return(0);
}
static void ste_miibus_statchg(dev)
device_t dev;
{
struct ste_softc *sc;
struct mii_data *mii;
sc = device_get_softc(dev);
mii = device_get_softc(sc->ste_miibus);
if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX) {
STE_SETBIT2(sc, STE_MACCTL0, STE_MACCTL0_FULLDUPLEX);
} else {
STE_CLRBIT2(sc, STE_MACCTL0, STE_MACCTL0_FULLDUPLEX);
}
return;
}
static int ste_ifmedia_upd(ifp)
struct ifnet *ifp;
{
struct ste_softc *sc;
struct mii_data *mii;
sc = ifp->if_softc;
mii = device_get_softc(sc->ste_miibus);
mii_mediachg(mii);
return(0);
}
static void ste_ifmedia_sts(ifp, ifmr)
struct ifnet *ifp;
struct ifmediareq *ifmr;
{
struct ste_softc *sc;
struct mii_data *mii;
sc = ifp->if_softc;
mii = device_get_softc(sc->ste_miibus);
mii_pollstat(mii);
ifmr->ifm_active = mii->mii_media_active;
ifmr->ifm_status = mii->mii_media_status;
return;
}
static void ste_wait(sc)
struct ste_softc *sc;
{
register int i;
for (i = 0; i < STE_TIMEOUT; i++) {
if (!(CSR_READ_4(sc, STE_DMACTL) & STE_DMACTL_DMA_HALTINPROG))
break;
}
if (i == STE_TIMEOUT)
printf("ste%d: command never completed!\n", sc->ste_unit);
return;
}
/*
* The EEPROM is slow: give it time to come ready after issuing
* it a command.
*/
static int ste_eeprom_wait(sc)
struct ste_softc *sc;
{
int i;
DELAY(1000);
for (i = 0; i < 100; i++) {
if (CSR_READ_2(sc, STE_EEPROM_CTL) & STE_EECTL_BUSY)
DELAY(1000);
else
break;
}
if (i == 100) {
printf("ste%d: eeprom failed to come ready\n", sc->ste_unit);
return(1);
}
return(0);
}
/*
* Read a sequence of words from the EEPROM. Note that ethernet address
* data is stored in the EEPROM in network byte order.
*/
static int ste_read_eeprom(sc, dest, off, cnt, swap)
struct ste_softc *sc;
caddr_t dest;
int off;
int cnt;
int swap;
{
int err = 0, i;
u_int16_t word = 0, *ptr;
if (ste_eeprom_wait(sc))
return(1);
for (i = 0; i < cnt; i++) {
CSR_WRITE_2(sc, STE_EEPROM_CTL, STE_EEOPCODE_READ | (off + i));
err = ste_eeprom_wait(sc);
if (err)
break;
word = CSR_READ_2(sc, STE_EEPROM_DATA);
ptr = (u_int16_t *)(dest + (i * 2));
if (swap)
*ptr = ntohs(word);
else
*ptr = word;
}
return(err ? 1 : 0);
}
static u_int8_t ste_calchash(addr)
caddr_t addr;
{
u_int32_t crc, carry;
int i, j;
u_int8_t c;
/* Compute CRC for the address value. */
crc = 0xFFFFFFFF; /* initial value */
for (i = 0; i < 6; i++) {
c = *(addr + i);
for (j = 0; j < 8; j++) {
carry = ((crc & 0x80000000) ? 1 : 0) ^ (c & 0x01);
crc <<= 1;
c >>= 1;
if (carry)
crc = (crc ^ 0x04c11db6) | carry;
}
}
/* return the filter bit position */
return(crc & 0x0000003F);
}
static void ste_setmulti(sc)
struct ste_softc *sc;
{
struct ifnet *ifp;
int h = 0;
u_int32_t hashes[2] = { 0, 0 };
struct ifmultiaddr *ifma;
ifp = &sc->arpcom.ac_if;
if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
STE_SETBIT1(sc, STE_RX_MODE, STE_RXMODE_ALLMULTI);
STE_CLRBIT1(sc, STE_RX_MODE, STE_RXMODE_MULTIHASH);
return;
}
/* first, zot all the existing hash bits */
CSR_WRITE_4(sc, STE_MAR0, 0);
CSR_WRITE_4(sc, STE_MAR1, 0);
/* now program new ones */
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 = ste_calchash(LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
if (h < 32)
hashes[0] |= (1 << h);
else
hashes[1] |= (1 << (h - 32));
}
CSR_WRITE_4(sc, STE_MAR0, hashes[0]);
CSR_WRITE_4(sc, STE_MAR1, hashes[1]);
STE_CLRBIT1(sc, STE_RX_MODE, STE_RXMODE_ALLMULTI);
STE_SETBIT1(sc, STE_RX_MODE, STE_RXMODE_MULTIHASH);
return;
}
static void ste_intr(xsc)
void *xsc;
{
struct ste_softc *sc;
struct ifnet *ifp;
u_int16_t status;
sc = xsc;
ifp = &sc->arpcom.ac_if;
/* See if this is really our interrupt. */
if (!(CSR_READ_2(sc, STE_ISR) & STE_ISR_INTLATCH))
return;
for (;;) {
status = CSR_READ_2(sc, STE_ISR_ACK);
if (!(status & STE_INTRS))
break;
if (status & STE_ISR_RX_DMADONE)
ste_rxeof(sc);
if (status & STE_ISR_TX_DMADONE)
ste_txeof(sc);
if (status & STE_ISR_TX_DONE)
ste_txeoc(sc);
if (status & STE_ISR_STATS_OFLOW) {
untimeout(ste_stats_update, sc, sc->ste_stat_ch);
ste_stats_update(sc);
}
if (status & STE_ISR_HOSTERR) {
ste_reset(sc);
ste_init(sc);
}
}
/* Re-enable interrupts */
CSR_WRITE_2(sc, STE_IMR, STE_INTRS);
if (ifp->if_snd.ifq_head != NULL)
ste_start(ifp);
return;
}
/*
* A frame has been uploaded: pass the resulting mbuf chain up to
* the higher level protocols.
*/
static void ste_rxeof(sc)
struct ste_softc *sc;
{
struct ether_header *eh;
struct mbuf *m;
struct ifnet *ifp;
struct ste_chain_onefrag *cur_rx;
int total_len = 0;
u_int32_t rxstat;
ifp = &sc->arpcom.ac_if;
again:
while((rxstat = sc->ste_cdata.ste_rx_head->ste_ptr->ste_status)) {
cur_rx = sc->ste_cdata.ste_rx_head;
sc->ste_cdata.ste_rx_head = cur_rx->ste_next;
/*
* 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 & STE_RXSTAT_FRAME_ERR) {
ifp->if_ierrors++;
cur_rx->ste_ptr->ste_status = 0;
continue;
}
/*
* If there error bit was not set, the upload complete
* bit should be set which means we have a valid packet.
* If not, something truly strange has happened.
*/
if (!(rxstat & STE_RXSTAT_DMADONE)) {
printf("ste%d: bad receive status -- packet dropped",
sc->ste_unit);
ifp->if_ierrors++;
cur_rx->ste_ptr->ste_status = 0;
continue;
}
/* No errors; receive the packet. */
m = cur_rx->ste_mbuf;
total_len = cur_rx->ste_ptr->ste_status & STE_RXSTAT_FRAMELEN;
/*
* 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 (ste_newbuf(sc, cur_rx, NULL) == ENOBUFS) {
ifp->if_ierrors++;
cur_rx->ste_ptr->ste_status = 0;
continue;
}
ifp->if_ipackets++;
eh = mtod(m, struct ether_header *);
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = m->m_len = total_len;
/* Handle BPF listeners. Let the BPF user see the packet. */
if (ifp->if_bpf)
bpf_mtap(ifp, m);
#ifdef BRIDGE
if (do_bridge) {
struct ifnet *bdg_ifp ;
bdg_ifp = bridge_in(m);
if (bdg_ifp != BDG_LOCAL && bdg_ifp != BDG_DROP)
bdg_forward(&m, bdg_ifp);
if (((bdg_ifp != BDG_LOCAL) && (bdg_ifp != BDG_BCAST) &&
(bdg_ifp != BDG_MCAST)) || bdg_ifp == BDG_DROP) {
m_freem(m);
continue;
}
}
#endif
/*
* Don't pass packet 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) {
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;
}
}
/* Remove header from mbuf and pass it on. */
m_adj(m, sizeof(struct ether_header));
ether_input(ifp, eh, m);
}
/*
* Handle the 'end of channel' condition. When the upload
* engine hits the end of the RX ring, it will stall. This
* is our cue to flush the RX ring, reload the uplist pointer
* register and unstall the engine.
* XXX This is actually a little goofy. With the ThunderLAN
* chip, you get an interrupt when the receiver hits the end
* of the receive ring, which tells you exactly when you
* you need to reload the ring pointer. Here we have to
* fake it. I'm mad at myself for not being clever enough
* to avoid the use of a goto here.
*/
if (CSR_READ_4(sc, STE_RX_DMALIST_PTR) == 0 ||
CSR_READ_4(sc, STE_DMACTL) & STE_DMACTL_RXDMA_STOPPED) {
STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_RXDMA_STALL);
ste_wait(sc);
CSR_WRITE_4(sc, STE_RX_DMALIST_PTR,
vtophys(&sc->ste_ldata->ste_rx_list[0]));
sc->ste_cdata.ste_rx_head = &sc->ste_cdata.ste_rx_chain[0];
STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_RXDMA_UNSTALL);
goto again;
}
return;
}
static void ste_txeoc(sc)
struct ste_softc *sc;
{
u_int8_t txstat;
struct ifnet *ifp;
ifp = &sc->arpcom.ac_if;
while ((txstat = CSR_READ_1(sc, STE_TX_STATUS)) &
STE_TXSTATUS_TXDONE) {
if (txstat & STE_TXSTATUS_UNDERRUN ||
txstat & STE_TXSTATUS_EXCESSCOLLS ||
txstat & STE_TXSTATUS_RECLAIMERR) {
ifp->if_oerrors++;
printf("ste%d: transmission error: %x\n",
sc->ste_unit, txstat);
STE_SETBIT4(sc, STE_ASICCTL, STE_ASICCTL_TX_RESET);
if (sc->ste_cdata.ste_tx_head != NULL)
CSR_WRITE_4(sc, STE_TX_DMALIST_PTR,
vtophys(sc->ste_cdata.ste_tx_head->ste_ptr));
if (txstat & STE_TXSTATUS_UNDERRUN &&
sc->ste_tx_thresh < STE_PACKET_SIZE) {
sc->ste_tx_thresh += STE_MIN_FRAMELEN;
printf("ste%d: tx underrun, increasing tx"
" start threshold to %d bytes\n",
sc->ste_unit, sc->ste_tx_thresh);
}
CSR_WRITE_2(sc, STE_TX_STARTTHRESH, sc->ste_tx_thresh);
CSR_WRITE_2(sc, STE_TX_RECLAIM_THRESH,
(STE_PACKET_SIZE >> 4));
}
ste_init(sc);
CSR_WRITE_2(sc, STE_TX_STATUS, txstat);
}
return;
}
static void ste_txeof(sc)
struct ste_softc *sc;
{
struct ste_chain *cur_tx;
struct ifnet *ifp;
ifp = &sc->arpcom.ac_if;
/* Clear the timeout timer. */
ifp->if_timer = 0;
while(sc->ste_cdata.ste_tx_head != NULL) {
cur_tx = sc->ste_cdata.ste_tx_head;
if (!(cur_tx->ste_ptr->ste_ctl & STE_TXCTL_DMADONE))
break;
sc->ste_cdata.ste_tx_head = cur_tx->ste_next;
m_freem(cur_tx->ste_mbuf);
cur_tx->ste_mbuf = NULL;
ifp->if_opackets++;
cur_tx->ste_next = sc->ste_cdata.ste_tx_free;
sc->ste_cdata.ste_tx_free = cur_tx;
}
if (sc->ste_cdata.ste_tx_head == NULL) {
ifp->if_flags &= ~IFF_OACTIVE;
sc->ste_cdata.ste_tx_tail = NULL;
} else {
if (CSR_READ_4(sc, STE_DMACTL) & STE_DMACTL_TXDMA_STOPPED ||
!CSR_READ_4(sc, STE_TX_DMALIST_PTR)) {
CSR_WRITE_4(sc, STE_TX_DMALIST_PTR,
vtophys(sc->ste_cdata.ste_tx_head->ste_ptr));
CSR_WRITE_4(sc, STE_DMACTL, STE_DMACTL_TXDMA_UNSTALL);
}
}
return;
}
static void ste_stats_update(xsc)
void *xsc;
{
struct ste_softc *sc;
struct ste_stats stats;
struct ifnet *ifp;
struct mii_data *mii;
int i, s;
u_int8_t *p;
s = splimp();
sc = xsc;
ifp = &sc->arpcom.ac_if;
mii = device_get_softc(sc->ste_miibus);
p = (u_int8_t *)&stats;
for (i = 0; i < sizeof(stats); i++) {
*p = CSR_READ_1(sc, STE_STATS + i);
p++;
}
ifp->if_collisions += stats.ste_single_colls +
stats.ste_multi_colls + stats.ste_late_colls;
mii_tick(mii);
sc->ste_stat_ch = timeout(ste_stats_update, sc, hz);
splx(s);
return;
}
/*
* Probe for a Sundance ST201 chip. Check the PCI vendor and device
* IDs against our list and return a device name if we find a match.
*/
static int ste_probe(dev)
device_t dev;
{
struct ste_type *t;
t = ste_devs;
while(t->ste_name != NULL) {
if ((pci_get_vendor(dev) == t->ste_vid) &&
(pci_get_device(dev) == t->ste_did)) {
device_set_desc(dev, t->ste_name);
return(0);
}
t++;
}
return(ENXIO);
}
/*
* Attach the interface. Allocate softc structures, do ifmedia
* setup and ethernet/BPF attach.
*/
static int ste_attach(dev)
device_t dev;
{
int s;
u_int32_t command;
struct ste_softc *sc;
struct ifnet *ifp;
int unit, error = 0, rid;
s = splimp();
sc = device_get_softc(dev);
unit = device_get_unit(dev);
bzero(sc, sizeof(struct ste_softc));
/*
* Handle power management nonsense.
*/
command = pci_read_config(dev, STE_PCI_CAPID, 4) & 0x000000FF;
if (command == 0x01) {
command = pci_read_config(dev, STE_PCI_PWRMGMTCTRL, 4);
if (command & STE_PSTATE_MASK) {
u_int32_t iobase, membase, irq;
/* Save important PCI config data. */
iobase = pci_read_config(dev, STE_PCI_LOIO, 4);
membase = pci_read_config(dev, STE_PCI_LOMEM, 4);
irq = pci_read_config(dev, STE_PCI_INTLINE, 4);
/* Reset the power state. */
printf("ste%d: chip is in D%d power mode "
"-- setting to D0\n", unit, command & STE_PSTATE_MASK);
command &= 0xFFFFFFFC;
pci_write_config(dev, STE_PCI_PWRMGMTCTRL, command, 4);
/* Restore PCI config data. */
pci_write_config(dev, STE_PCI_LOIO, iobase, 4);
pci_write_config(dev, STE_PCI_LOMEM, membase, 4);
pci_write_config(dev, STE_PCI_INTLINE, irq, 4);
}
}
/*
* Map control/status registers.
*/
command = pci_read_config(dev, PCI_COMMAND_STATUS_REG, 4);
command |= (PCIM_CMD_PORTEN|PCIM_CMD_MEMEN|PCIM_CMD_BUSMASTEREN);
pci_write_config(dev, PCI_COMMAND_STATUS_REG, command, 4);
command = pci_read_config(dev, PCI_COMMAND_STATUS_REG, 4);
#ifdef STE_USEIOSPACE
if (!(command & PCIM_CMD_PORTEN)) {
printf("ste%d: failed to enable I/O ports!\n", unit);
error = ENXIO;
goto fail;
}
#else
if (!(command & PCIM_CMD_MEMEN)) {
printf("ste%d: failed to enable memory mapping!\n", unit);
error = ENXIO;
goto fail;
}
#endif
rid = STE_RID;
sc->ste_res = bus_alloc_resource(dev, STE_RES, &rid,
0, ~0, 1, RF_ACTIVE);
if (sc->ste_res == NULL) {
printf ("ste%d: couldn't map ports/memory\n", unit);
error = ENXIO;
goto fail;
}
sc->ste_btag = rman_get_bustag(sc->ste_res);
sc->ste_bhandle = rman_get_bushandle(sc->ste_res);
rid = 0;
sc->ste_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
RF_SHAREABLE | RF_ACTIVE);
if (sc->ste_irq == NULL) {
printf("ste%d: couldn't map interrupt\n", unit);
bus_release_resource(dev, STE_RES, STE_RID, sc->ste_res);
error = ENXIO;
goto fail;
}
error = bus_setup_intr(dev, sc->ste_irq, INTR_TYPE_NET,
ste_intr, sc, &sc->ste_intrhand);
if (error) {
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->ste_irq);
bus_release_resource(dev, STE_RES, STE_RID, sc->ste_res);
printf("ste%d: couldn't set up irq\n", unit);
goto fail;
}
callout_handle_init(&sc->ste_stat_ch);
/* Reset the adapter. */
ste_reset(sc);
/*
* Get station address from the EEPROM.
*/
if (ste_read_eeprom(sc, (caddr_t)&sc->arpcom.ac_enaddr,
STE_EEADDR_NODE0, 3, 0)) {
printf("ste%d: failed to read station address\n", unit);
bus_teardown_intr(dev, sc->ste_irq, sc->ste_intrhand);
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->ste_irq);
bus_release_resource(dev, STE_RES, STE_RID, sc->ste_res);
error = ENXIO;;
goto fail;
}
/*
* A Sundance chip was detected. Inform the world.
*/
printf("ste%d: Ethernet address: %6D\n", unit,
sc->arpcom.ac_enaddr, ":");
sc->ste_unit = unit;
/* Allocate the descriptor queues. */
sc->ste_ldata = contigmalloc(sizeof(struct ste_list_data), M_DEVBUF,
M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0);
if (sc->ste_ldata == NULL) {
printf("ste%d: no memory for list buffers!\n", unit);
bus_teardown_intr(dev, sc->ste_irq, sc->ste_intrhand);
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->ste_irq);
bus_release_resource(dev, STE_RES, STE_RID, sc->ste_res);
error = ENXIO;
goto fail;
}
bzero(sc->ste_ldata, sizeof(struct ste_list_data));
/* Do MII setup. */
if (mii_phy_probe(dev, &sc->ste_miibus,
ste_ifmedia_upd, ste_ifmedia_sts)) {
printf("ste%d: MII without any phy!\n", sc->ste_unit);
bus_teardown_intr(dev, sc->ste_irq, sc->ste_intrhand);
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->ste_irq);
bus_release_resource(dev, STE_RES, STE_RID, sc->ste_res);
free(sc->ste_ldata, M_DEVBUF);
error = ENXIO;
goto fail;
}
ifp = &sc->arpcom.ac_if;
ifp->if_softc = sc;
ifp->if_unit = unit;
ifp->if_name = "ste";
ifp->if_mtu = ETHERMTU;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = ste_ioctl;
ifp->if_output = ether_output;
ifp->if_start = ste_start;
ifp->if_watchdog = ste_watchdog;
ifp->if_init = ste_init;
ifp->if_baudrate = 10000000;
ifp->if_snd.ifq_maxlen = STE_TX_LIST_CNT - 1;
/*
* Call MI attach routines.
*/
if_attach(ifp);
ether_ifattach(ifp);
bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header));
fail:
splx(s);
return(error);
}
static int ste_detach(dev)
device_t dev;
{
struct ste_softc *sc;
struct ifnet *ifp;
int s;
s = splimp();
sc = device_get_softc(dev);
ifp = &sc->arpcom.ac_if;
ste_stop(sc);
if_detach(ifp);
bus_generic_detach(dev);
device_delete_child(dev, sc->ste_miibus);
bus_teardown_intr(dev, sc->ste_irq, sc->ste_intrhand);
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->ste_irq);
bus_release_resource(dev, STE_RES, STE_RID, sc->ste_res);
free(sc->ste_ldata, M_DEVBUF);
splx(s);
return(0);
}
static int ste_newbuf(sc, c, m)
struct ste_softc *sc;
struct ste_chain_onefrag *c;
struct mbuf *m;
{
struct mbuf *m_new = NULL;
if (m == NULL) {
MGETHDR(m_new, M_DONTWAIT, MT_DATA);
if (m_new == NULL) {
printf("ste%d: no memory for rx list -- "
"packet dropped\n", sc->ste_unit);
return(ENOBUFS);
}
MCLGET(m_new, M_DONTWAIT);
if (!(m_new->m_flags & M_EXT)) {
printf("ste%d: no memory for rx list -- "
"packet dropped\n", sc->ste_unit);
m_freem(m_new);
return(ENOBUFS);
}
m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
} else {
m_new = m;
m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
m_new->m_data = m_new->m_ext.ext_buf;
}
m_adj(m_new, ETHER_ALIGN);
c->ste_mbuf = m_new;
c->ste_ptr->ste_status = 0;
c->ste_ptr->ste_frag.ste_addr = vtophys(mtod(m_new, caddr_t));
c->ste_ptr->ste_frag.ste_len = 1536 | STE_FRAG_LAST;
return(0);
}
static int ste_init_rx_list(sc)
struct ste_softc *sc;
{
struct ste_chain_data *cd;
struct ste_list_data *ld;
int i;
cd = &sc->ste_cdata;
ld = sc->ste_ldata;
for (i = 0; i < STE_RX_LIST_CNT; i++) {
cd->ste_rx_chain[i].ste_ptr = &ld->ste_rx_list[i];
if (ste_newbuf(sc, &cd->ste_rx_chain[i], NULL) == ENOBUFS)
return(ENOBUFS);
if (i == (STE_RX_LIST_CNT - 1)) {
cd->ste_rx_chain[i].ste_next =
&cd->ste_rx_chain[0];
ld->ste_rx_list[i].ste_next =
vtophys(&ld->ste_rx_list[0]);
} else {
cd->ste_rx_chain[i].ste_next =
&cd->ste_rx_chain[i + 1];
ld->ste_rx_list[i].ste_next =
vtophys(&ld->ste_rx_list[i + 1]);
}
}
cd->ste_rx_head = &cd->ste_rx_chain[0];
return(0);
}
static void ste_init_tx_list(sc)
struct ste_softc *sc;
{
struct ste_chain_data *cd;
struct ste_list_data *ld;
int i;
cd = &sc->ste_cdata;
ld = sc->ste_ldata;
for (i = 0; i < STE_TX_LIST_CNT; i++) {
cd->ste_tx_chain[i].ste_ptr = &ld->ste_tx_list[i];
if (i == (STE_TX_LIST_CNT - 1))
cd->ste_tx_chain[i].ste_next = NULL;
else
cd->ste_tx_chain[i].ste_next =
&cd->ste_tx_chain[i + 1];
}
cd->ste_tx_free = &cd->ste_tx_chain[0];
cd->ste_tx_tail = cd->ste_tx_head = NULL;
return;
}
static void ste_init(xsc)
void *xsc;
{
struct ste_softc *sc;
int i, s;
struct ifnet *ifp;
struct mii_data *mii;
s = splimp();
sc = xsc;
ifp = &sc->arpcom.ac_if;
mii = device_get_softc(sc->ste_miibus);
ste_stop(sc);
/* Init our MAC address */
for (i = 0; i < ETHER_ADDR_LEN; i++) {
CSR_WRITE_1(sc, STE_PAR0 + i, sc->arpcom.ac_enaddr[i]);
}
/* Init RX list */
if (ste_init_rx_list(sc) == ENOBUFS) {
printf("ste%d: initialization failed: no "
"memory for RX buffers\n", sc->ste_unit);
ste_stop(sc);
splx(s);
return;
}
/* Init TX descriptors */
ste_init_tx_list(sc);
/* Set the TX freethresh value */
CSR_WRITE_1(sc, STE_TX_DMABURST_THRESH, STE_PACKET_SIZE >> 8);
/* Set the TX start threshold for best performance. */
sc->ste_tx_thresh = STE_MIN_FRAMELEN;
CSR_WRITE_2(sc, STE_TX_STARTTHRESH, sc->ste_tx_thresh);
/* Set the TX reclaim threshold. */
CSR_WRITE_1(sc, STE_TX_RECLAIM_THRESH, (STE_PACKET_SIZE >> 4));
/* Set up the RX filter. */
CSR_WRITE_1(sc, STE_RX_MODE, STE_RXMODE_UNICAST);
/* If we want promiscuous mode, set the allframes bit. */
if (ifp->if_flags & IFF_PROMISC) {
STE_SETBIT1(sc, STE_RX_MODE, STE_RXMODE_PROMISC);
} else {
STE_CLRBIT1(sc, STE_RX_MODE, STE_RXMODE_PROMISC);
}
/* Set capture broadcast bit to accept broadcast frames. */
if (ifp->if_flags & IFF_BROADCAST) {
STE_SETBIT1(sc, STE_RX_MODE, STE_RXMODE_BROADCAST);
} else {
STE_CLRBIT1(sc, STE_RX_MODE, STE_RXMODE_BROADCAST);
}
ste_setmulti(sc);
/* Load the address of the RX list. */
STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_RXDMA_STALL);
ste_wait(sc);
CSR_WRITE_4(sc, STE_RX_DMALIST_PTR,
vtophys(&sc->ste_ldata->ste_rx_list[0]));
STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_RXDMA_UNSTALL);
STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_RXDMA_UNSTALL);
/* Enable receiver and transmitter */
CSR_WRITE_2(sc, STE_MACCTL0, 0);
STE_SETBIT2(sc, STE_MACCTL1, STE_MACCTL1_TX_ENABLE);
STE_SETBIT2(sc, STE_MACCTL1, STE_MACCTL1_RX_ENABLE);
/* Enable stats counters. */
STE_SETBIT2(sc, STE_MACCTL1, STE_MACCTL1_STATS_ENABLE);
/* Enable interrupts. */
CSR_WRITE_2(sc, STE_ISR, 0xFFFF);
CSR_WRITE_2(sc, STE_IMR, STE_INTRS);
mii_mediachg(mii);
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
splx(s);
sc->ste_stat_ch = timeout(ste_stats_update, sc, hz);
return;
}
static void ste_stop(sc)
struct ste_softc *sc;
{
int i;
struct ifnet *ifp;
ifp = &sc->arpcom.ac_if;
untimeout(ste_stats_update, sc, sc->ste_stat_ch);
CSR_WRITE_2(sc, STE_IMR, 0);
STE_SETBIT2(sc, STE_MACCTL1, STE_MACCTL1_TX_DISABLE);
STE_SETBIT2(sc, STE_MACCTL1, STE_MACCTL1_RX_DISABLE);
STE_SETBIT2(sc, STE_MACCTL1, STE_MACCTL1_STATS_DISABLE);
STE_SETBIT2(sc, STE_DMACTL, STE_DMACTL_TXDMA_STALL);
STE_SETBIT2(sc, STE_DMACTL, STE_DMACTL_RXDMA_STALL);
ste_wait(sc);
for (i = 0; i < STE_RX_LIST_CNT; i++) {
if (sc->ste_cdata.ste_rx_chain[i].ste_mbuf != NULL) {
m_freem(sc->ste_cdata.ste_rx_chain[i].ste_mbuf);
sc->ste_cdata.ste_rx_chain[i].ste_mbuf = NULL;
}
}
for (i = 0; i < STE_TX_LIST_CNT; i++) {
if (sc->ste_cdata.ste_tx_chain[i].ste_mbuf != NULL) {
m_freem(sc->ste_cdata.ste_tx_chain[i].ste_mbuf);
sc->ste_cdata.ste_tx_chain[i].ste_mbuf = NULL;
}
}
ifp->if_flags &= ~(IFF_RUNNING|IFF_OACTIVE);
return;
}
static void ste_reset(sc)
struct ste_softc *sc;
{
int i;
STE_SETBIT4(sc, STE_ASICCTL,
STE_ASICCTL_GLOBAL_RESET|STE_ASICCTL_RX_RESET|
STE_ASICCTL_TX_RESET|STE_ASICCTL_DMA_RESET|
STE_ASICCTL_FIFO_RESET|STE_ASICCTL_NETWORK_RESET|
STE_ASICCTL_AUTOINIT_RESET|STE_ASICCTL_HOST_RESET|
STE_ASICCTL_EXTRESET_RESET);
DELAY(100000);
for (i = 0; i < STE_TIMEOUT; i++) {
if (!(CSR_READ_4(sc, STE_ASICCTL) & STE_ASICCTL_RESET_BUSY))
break;
}
if (i == STE_TIMEOUT)
printf("ste%d: global reset never completed\n", sc->ste_unit);
#ifdef foo
STE_SETBIT4(sc, STE_ASICCTL, STE_ASICCTL_RX_RESET);
for (i = 0; i < STE_TIMEOUT; i++) {
if (!(CSR_READ_4(sc, STE_ASICCTL) & STE_ASICCTL_RX_RESET))
break;
}
if (i == STE_TIMEOUT)
printf("ste%d: RX reset never completed\n", sc->ste_unit);
DELAY(100000);
STE_SETBIT4(sc, STE_ASICCTL, STE_ASICCTL_TX_RESET);
for (i = 0; i < STE_TIMEOUT; i++) {
if (!(CSR_READ_4(sc, STE_ASICCTL) & STE_ASICCTL_TX_RESET))
break;
}
if (i == STE_TIMEOUT)
printf("ste%d: TX reset never completed\n", sc->ste_unit);
DELAY(100000);
#endif
return;
}
static int ste_ioctl(ifp, command, data)
struct ifnet *ifp;
u_long command;
caddr_t data;
{
struct ste_softc *sc;
struct ifreq *ifr;
struct mii_data *mii;
int error = 0, s;
s = splimp();
sc = ifp->if_softc;
ifr = (struct ifreq *)data;
switch(command) {
case SIOCSIFADDR:
case SIOCGIFADDR:
case SIOCSIFMTU:
error = ether_ioctl(ifp, command, data);
break;
case SIOCSIFFLAGS:
if (ifp->if_flags & IFF_UP) {
ste_init(sc);
} else {
if (ifp->if_flags & IFF_RUNNING)
ste_stop(sc);
}
error = 0;
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
ste_setmulti(sc);
error = 0;
break;
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
mii = device_get_softc(sc->ste_miibus);
error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
break;
default:
error = EINVAL;
break;
}
splx(s);
return(error);
}
static int ste_encap(sc, c, m_head)
struct ste_softc *sc;
struct ste_chain *c;
struct mbuf *m_head;
{
int frag = 0;
struct ste_frag *f = NULL;
int total_len;
struct mbuf *m;
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 == STE_MAXFRAGS)
break;
total_len += m->m_len;
f = &c->ste_ptr->ste_frags[frag];
f->ste_addr = vtophys(mtod(m, vm_offset_t));
f->ste_len = m->m_len;
frag++;
}
}
if (m != NULL) {
struct mbuf *m_new = NULL;
MGETHDR(m_new, M_DONTWAIT, MT_DATA);
if (m_new == NULL) {
printf("ste%d: no memory for "
"tx list", sc->ste_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("ste%d: no memory for "
"tx list", sc->ste_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->ste_ptr->ste_frags[0];
f->ste_addr = vtophys(mtod(m_new, caddr_t));
f->ste_len = total_len = m_new->m_len;
frag = 1;
}
c->ste_mbuf = m_head;
c->ste_ptr->ste_frags[frag - 1].ste_len |= STE_FRAG_LAST;
c->ste_ptr->ste_ctl = total_len;
c->ste_ptr->ste_next = 0;
return(0);
}
static void ste_start(ifp)
struct ifnet *ifp;
{
struct ste_softc *sc;
struct mbuf *m_head = NULL;
struct ste_chain *prev = NULL, *cur_tx = NULL, *start_tx;
sc = ifp->if_softc;
if (sc->ste_cdata.ste_tx_free == NULL) {
ifp->if_flags |= IFF_OACTIVE;
return;
}
start_tx = sc->ste_cdata.ste_tx_free;
while(sc->ste_cdata.ste_tx_free != NULL) {
IF_DEQUEUE(&ifp->if_snd, m_head);
if (m_head == NULL)
break;
cur_tx = sc->ste_cdata.ste_tx_free;
sc->ste_cdata.ste_tx_free = cur_tx->ste_next;
cur_tx->ste_next = NULL;
ste_encap(sc, cur_tx, m_head);
if (prev != NULL) {
prev->ste_next = cur_tx;
prev->ste_ptr->ste_next = vtophys(cur_tx->ste_ptr);
}
prev = cur_tx;
/*
* If there's a BPF listener, bounce a copt of this frame
* to him.
*/
if (ifp->if_bpf)
bpf_mtap(ifp, cur_tx->ste_mbuf);
}
if (cur_tx == NULL)
return;
cur_tx->ste_ptr->ste_ctl |= STE_TXCTL_DMAINTR;
STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_TXDMA_STALL);
ste_wait(sc);
if (sc->ste_cdata.ste_tx_head != NULL) {
sc->ste_cdata.ste_tx_tail->ste_next = start_tx;
sc->ste_cdata.ste_tx_tail->ste_ptr->ste_next =
vtophys(start_tx->ste_ptr);
sc->ste_cdata.ste_tx_tail->ste_ptr->ste_ctl &=
~STE_TXCTL_DMAINTR;
sc->ste_cdata.ste_tx_tail = cur_tx;
} else {
sc->ste_cdata.ste_tx_head = start_tx;
sc->ste_cdata.ste_tx_tail = cur_tx;
}
if (!CSR_READ_4(sc, STE_TX_DMALIST_PTR))
CSR_WRITE_4(sc, STE_TX_DMALIST_PTR,
vtophys(start_tx->ste_ptr));
STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_TXDMA_UNSTALL);
ifp->if_timer = 5;
return;
}
static void ste_watchdog(ifp)
struct ifnet *ifp;
{
struct ste_softc *sc;
sc = ifp->if_softc;
ifp->if_oerrors++;
printf("ste%d: watchdog timeout\n", sc->ste_unit);
#ifdef foo
if (sc->ste_pinfo != NULL) {
if (!(ste_phy_readreg(sc, PHY_BMSR) & PHY_BMSR_LINKSTAT))
printf("ste%d: no carrier - transceiver "
"cable problem?\n", sc->ste_unit);
}
#endif
ste_txeoc(sc);
ste_txeof(sc);
ste_rxeof(sc);
ste_reset(sc);
ste_init(sc);
if (ifp->if_snd.ifq_head != NULL)
ste_start(ifp);
return;
}
static void ste_shutdown(dev)
device_t dev;
{
struct ste_softc *sc;
sc = device_get_softc(dev);
ste_stop(sc);
return;
}
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