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freebsd-dev/sys/pci/if_ste.c

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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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifdef HAVE_KERNEL_OPTION_HEADERS
#include "opt_device_polling.h"
#endif
#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/module.h>
#include <sys/socket.h>
#include <sys/sysctl.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/if_types.h>
#include <net/if_vlan_var.h>
#include <net/bpf.h>
#include <vm/vm.h> /* for vtophys */
#include <vm/pmap.h> /* for vtophys */
#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 <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
/* "device miibus" required. See GENERIC if you get errors here. */
#include "miibus_if.h"
#define STE_USEIOSPACE
#include <pci/if_stereg.h>
MODULE_DEPEND(ste, pci, 1, 1, 1);
MODULE_DEPEND(ste, ether, 1, 1, 1);
MODULE_DEPEND(ste, miibus, 1, 1, 1);
/*
* 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_DL10050, "D-Link DL10050 10/100BaseTX" },
{ 0, 0, NULL }
};
static int ste_probe(device_t);
static int ste_attach(device_t);
static int ste_detach(device_t);
static void ste_init(void *);
static void ste_init_locked(struct ste_softc *);
static void ste_intr(void *);
static void ste_rxeoc(struct ste_softc *);
static void ste_rxeof(struct ste_softc *);
static void ste_txeoc(struct ste_softc *);
static void ste_txeof(struct ste_softc *);
static void ste_stats_update(void *);
static void ste_stop(struct ste_softc *);
static void ste_reset(struct ste_softc *);
static int ste_ioctl(struct ifnet *, u_long, caddr_t);
static int ste_encap(struct ste_softc *, struct ste_chain *, struct mbuf *);
static void ste_start(struct ifnet *);
static void ste_start_locked(struct ifnet *);
static void ste_watchdog(struct ifnet *);
static void ste_shutdown(device_t);
static int ste_newbuf(struct ste_softc *, struct ste_chain_onefrag *,
struct mbuf *);
static int ste_ifmedia_upd(struct ifnet *);
static void ste_ifmedia_upd_locked(struct ifnet *);
static void ste_ifmedia_sts(struct ifnet *, struct ifmediareq *);
static void ste_mii_sync(struct ste_softc *);
static void ste_mii_send(struct ste_softc *, u_int32_t, int);
static int ste_mii_readreg(struct ste_softc *, struct ste_mii_frame *);
static int ste_mii_writereg(struct ste_softc *, struct ste_mii_frame *);
static int ste_miibus_readreg(device_t, int, int);
static int ste_miibus_writereg(device_t, int, int, int);
static void ste_miibus_statchg(device_t);
static int ste_eeprom_wait(struct ste_softc *);
static int ste_read_eeprom(struct ste_softc *, caddr_t, int, int, int);
static void ste_wait(struct ste_softc *);
static void ste_setmulti(struct ste_softc *);
static int ste_init_rx_list(struct ste_softc *);
static void ste_init_tx_list(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(ste, pci, ste_driver, ste_devclass, 0, 0);
DRIVER_MODULE(miibus, ste, miibus_driver, miibus_devclass, 0, 0);
SYSCTL_NODE(_hw, OID_AUTO, ste, CTLFLAG_RD, 0, "if_ste parameters");
static int ste_rxsyncs;
SYSCTL_INT(_hw_ste, OID_AUTO, rxsyncs, CTLFLAG_RW, &ste_rxsyncs, 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;
/*
* 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);
ack = CSR_READ_2(sc, STE_PHYCTL) & STE_PHYCTL_MDATA;
MII_SET(STE_PHYCTL_MCLK);
DELAY(1);
/*
* 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);
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;
{
/*
* 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);
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);
if ( sc->ste_one_phy && phy != 0 )
return (0);
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;
sc = ifp->if_softc;
STE_LOCK(sc);
ste_ifmedia_upd_locked(ifp);
STE_UNLOCK(sc);
return(0);
}
static void
ste_ifmedia_upd_locked(ifp)
struct ifnet *ifp;
{
struct ste_softc *sc;
struct mii_data *mii;
sc = ifp->if_softc;
STE_LOCK_ASSERT(sc);
mii = device_get_softc(sc->ste_miibus);
sc->ste_link = 0;
if (mii->mii_instance) {
struct mii_softc *miisc;
LIST_FOREACH(miisc, &mii->mii_phys, mii_list)
mii_phy_reset(miisc);
}
mii_mediachg(mii);
}
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);
STE_LOCK(sc);
mii_pollstat(mii);
ifmr->ifm_active = mii->mii_media_active;
ifmr->ifm_status = mii->mii_media_status;
STE_UNLOCK(sc);
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)
if_printf(sc->ste_ifp, "command never completed!\n");
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) {
if_printf(sc->ste_ifp, "eeprom failed to come ready\n");
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 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->ste_ifp;
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_2(sc, STE_MAR0, 0);
CSR_WRITE_2(sc, STE_MAR1, 0);
CSR_WRITE_2(sc, STE_MAR2, 0);
CSR_WRITE_2(sc, STE_MAR3, 0);
/* now program new ones */
IF_ADDR_LOCK(ifp);
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
h = ether_crc32_be(LLADDR((struct sockaddr_dl *)
ifma->ifma_addr), ETHER_ADDR_LEN) & 0x3F;
if (h < 32)
hashes[0] |= (1 << h);
else
hashes[1] |= (1 << (h - 32));
}
IF_ADDR_UNLOCK(ifp);
CSR_WRITE_2(sc, STE_MAR0, hashes[0] & 0xFFFF);
CSR_WRITE_2(sc, STE_MAR1, (hashes[0] >> 16) & 0xFFFF);
CSR_WRITE_2(sc, STE_MAR2, hashes[1] & 0xFFFF);
CSR_WRITE_2(sc, STE_MAR3, (hashes[1] >> 16) & 0xFFFF);
STE_CLRBIT1(sc, STE_RX_MODE, STE_RXMODE_ALLMULTI);
STE_SETBIT1(sc, STE_RX_MODE, STE_RXMODE_MULTIHASH);
return;
}
#ifdef DEVICE_POLLING
static poll_handler_t ste_poll, ste_poll_locked;
static void
ste_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
{
struct ste_softc *sc = ifp->if_softc;
STE_LOCK(sc);
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
ste_poll_locked(ifp, cmd, count);
STE_UNLOCK(sc);
}
static void
ste_poll_locked(struct ifnet *ifp, enum poll_cmd cmd, int count)
{
struct ste_softc *sc = ifp->if_softc;
STE_LOCK_ASSERT(sc);
sc->rxcycles = count;
if (cmd == POLL_AND_CHECK_STATUS)
ste_rxeoc(sc);
ste_rxeof(sc);
ste_txeof(sc);
if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
ste_start_locked(ifp);
if (cmd == POLL_AND_CHECK_STATUS) {
u_int16_t status;
status = CSR_READ_2(sc, STE_ISR_ACK);
if (status & STE_ISR_TX_DONE)
ste_txeoc(sc);
if (status & STE_ISR_STATS_OFLOW) {
callout_stop(&sc->ste_stat_callout);
ste_stats_update(sc);
}
if (status & STE_ISR_LINKEVENT)
mii_pollstat(device_get_softc(sc->ste_miibus));
if (status & STE_ISR_HOSTERR) {
ste_reset(sc);
ste_init_locked(sc);
}
}
}
#endif /* DEVICE_POLLING */
static void
ste_intr(xsc)
void *xsc;
{
struct ste_softc *sc;
struct ifnet *ifp;
u_int16_t status;
sc = xsc;
STE_LOCK(sc);
ifp = sc->ste_ifp;
#ifdef DEVICE_POLLING
if (ifp->if_capenable & IFCAP_POLLING) {
STE_UNLOCK(sc);
return;
}
#endif
/* See if this is really our interrupt. */
if (!(CSR_READ_2(sc, STE_ISR) & STE_ISR_INTLATCH)) {
STE_UNLOCK(sc);
return;
}
for (;;) {
status = CSR_READ_2(sc, STE_ISR_ACK);
if (!(status & STE_INTRS))
break;
if (status & STE_ISR_RX_DMADONE) {
ste_rxeoc(sc);
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) {
callout_stop(&sc->ste_stat_callout);
ste_stats_update(sc);
}
if (status & STE_ISR_LINKEVENT)
mii_pollstat(device_get_softc(sc->ste_miibus));
if (status & STE_ISR_HOSTERR) {
ste_reset(sc);
ste_init_locked(sc);
}
}
/* Re-enable interrupts */
CSR_WRITE_2(sc, STE_IMR, STE_INTRS);
if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
ste_start_locked(ifp);
STE_UNLOCK(sc);
return;
}
static void
ste_rxeoc(struct ste_softc *sc)
{
struct ste_chain_onefrag *cur_rx;
STE_LOCK_ASSERT(sc);
if (sc->ste_cdata.ste_rx_head->ste_ptr->ste_status == 0) {
cur_rx = sc->ste_cdata.ste_rx_head;
do {
cur_rx = cur_rx->ste_next;
/* If the ring is empty, just return. */
if (cur_rx == sc->ste_cdata.ste_rx_head)
return;
} while (cur_rx->ste_ptr->ste_status == 0);
if (sc->ste_cdata.ste_rx_head->ste_ptr->ste_status == 0) {
/* We've fallen behind the chip: catch it. */
sc->ste_cdata.ste_rx_head = cur_rx;
++ste_rxsyncs;
}
}
}
/*
* 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 mbuf *m;
struct ifnet *ifp;
struct ste_chain_onefrag *cur_rx;
int total_len = 0, count=0;
u_int32_t rxstat;
STE_LOCK_ASSERT(sc);
ifp = sc->ste_ifp;
while((rxstat = sc->ste_cdata.ste_rx_head->ste_ptr->ste_status)
& STE_RXSTAT_DMADONE) {
#ifdef DEVICE_POLLING
if (ifp->if_capenable & IFCAP_POLLING) {
if (sc->rxcycles <= 0)
break;
sc->rxcycles--;
}
#endif
if ((STE_RX_LIST_CNT - count) < 3) {
break;
}
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)) {
if_printf(ifp,
"bad receive status -- packet dropped\n");
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;
}
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = m->m_len = total_len;
ifp->if_ipackets++;
STE_UNLOCK(sc);
(*ifp->if_input)(ifp, m);
STE_LOCK(sc);
cur_rx->ste_ptr->ste_status = 0;
count++;
}
return;
}
static void
ste_txeoc(sc)
struct ste_softc *sc;
{
u_int8_t txstat;
struct ifnet *ifp;
ifp = sc->ste_ifp;
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++;
if_printf(ifp, "transmission error: %x\n", txstat);
ste_reset(sc);
ste_init_locked(sc);
if (txstat & STE_TXSTATUS_UNDERRUN &&
sc->ste_tx_thresh < STE_PACKET_SIZE) {
sc->ste_tx_thresh += STE_MIN_FRAMELEN;
if_printf(ifp, "tx underrun, increasing tx"
" start threshold to %d bytes\n",
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_locked(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;
int idx;
ifp = sc->ste_ifp;
idx = sc->ste_cdata.ste_tx_cons;
while(idx != sc->ste_cdata.ste_tx_prod) {
cur_tx = &sc->ste_cdata.ste_tx_chain[idx];
if (!(cur_tx->ste_ptr->ste_ctl & STE_TXCTL_DMADONE))
break;
m_freem(cur_tx->ste_mbuf);
cur_tx->ste_mbuf = NULL;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
ifp->if_opackets++;
STE_INC(idx, STE_TX_LIST_CNT);
}
sc->ste_cdata.ste_tx_cons = idx;
if (idx == sc->ste_cdata.ste_tx_prod)
ifp->if_timer = 0;
}
static void
ste_stats_update(xsc)
void *xsc;
{
struct ste_softc *sc;
struct ifnet *ifp;
struct mii_data *mii;
sc = xsc;
STE_LOCK_ASSERT(sc);
ifp = sc->ste_ifp;
mii = device_get_softc(sc->ste_miibus);
ifp->if_collisions += CSR_READ_1(sc, STE_LATE_COLLS)
+ CSR_READ_1(sc, STE_MULTI_COLLS)
+ CSR_READ_1(sc, STE_SINGLE_COLLS);
if (!sc->ste_link) {
mii_pollstat(mii);
if (mii->mii_media_status & IFM_ACTIVE &&
IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
sc->ste_link++;
/*
* we don't get a call-back on re-init so do it
* otherwise we get stuck in the wrong link state
*/
ste_miibus_statchg(sc->ste_dev);
if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
ste_start_locked(ifp);
}
}
callout_reset(&sc->ste_stat_callout, hz, ste_stats_update, sc);
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 (BUS_PROBE_DEFAULT);
}
t++;
}
return(ENXIO);
}
/*
* Attach the interface. Allocate softc structures, do ifmedia
* setup and ethernet/BPF attach.
*/
static int
ste_attach(dev)
device_t dev;
{
struct ste_softc *sc;
struct ifnet *ifp;
int error = 0, rid;
u_char eaddr[6];
sc = device_get_softc(dev);
sc->ste_dev = dev;
/*
* Only use one PHY since this chip reports multiple
* Note on the DFE-550 the PHY is at 1 on the DFE-580
* it is at 0 & 1. It is rev 0x12.
*/
if (pci_get_vendor(dev) == DL_VENDORID &&
pci_get_device(dev) == DL_DEVICEID_DL10050 &&
pci_get_revid(dev) == 0x12 )
sc->ste_one_phy = 1;
mtx_init(&sc->ste_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
MTX_DEF);
/*
* Map control/status registers.
*/
pci_enable_busmaster(dev);
rid = STE_RID;
sc->ste_res = bus_alloc_resource_any(dev, STE_RES, &rid, RF_ACTIVE);
if (sc->ste_res == NULL) {
device_printf(dev, "couldn't map ports/memory\n");
error = ENXIO;
goto fail;
}
sc->ste_btag = rman_get_bustag(sc->ste_res);
sc->ste_bhandle = rman_get_bushandle(sc->ste_res);
/* Allocate interrupt */
rid = 0;
sc->ste_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_SHAREABLE | RF_ACTIVE);
if (sc->ste_irq == NULL) {
device_printf(dev, "couldn't map interrupt\n");
error = ENXIO;
goto fail;
}
callout_init_mtx(&sc->ste_stat_callout, &sc->ste_mtx, 0);
/* Reset the adapter. */
ste_reset(sc);
/*
* Get station address from the EEPROM.
*/
if (ste_read_eeprom(sc, eaddr,
STE_EEADDR_NODE0, 3, 0)) {
device_printf(dev, "failed to read station address\n");
error = ENXIO;;
goto fail;
}
/* 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) {
device_printf(dev, "no memory for list buffers!\n");
error = ENXIO;
goto fail;
}
bzero(sc->ste_ldata, sizeof(struct ste_list_data));
ifp = sc->ste_ifp = if_alloc(IFT_ETHER);
if (ifp == NULL) {
device_printf(dev, "can not if_alloc()\n");
error = ENOSPC;
goto fail;
}
/* Do MII setup. */
if (mii_phy_probe(dev, &sc->ste_miibus,
ste_ifmedia_upd, ste_ifmedia_sts)) {
device_printf(dev, "MII without any phy!\n");
error = ENXIO;
goto fail;
}
ifp->if_softc = sc;
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
ifp->if_mtu = ETHERMTU;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = ste_ioctl;
ifp->if_start = ste_start;
ifp->if_watchdog = ste_watchdog;
ifp->if_init = ste_init;
IFQ_SET_MAXLEN(&ifp->if_snd, STE_TX_LIST_CNT - 1);
ifp->if_snd.ifq_drv_maxlen = STE_TX_LIST_CNT - 1;
IFQ_SET_READY(&ifp->if_snd);
sc->ste_tx_thresh = STE_TXSTART_THRESH;
/*
* Call MI attach routine.
*/
ether_ifattach(ifp, eaddr);
/*
* Tell the upper layer(s) we support long frames.
*/
ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header);
ifp->if_capabilities |= IFCAP_VLAN_MTU;
ifp->if_capenable = ifp->if_capabilities;
#ifdef DEVICE_POLLING
ifp->if_capabilities |= IFCAP_POLLING;
#endif
/* Hook interrupt last to avoid having to lock softc */
error = bus_setup_intr(dev, sc->ste_irq, INTR_TYPE_NET | INTR_MPSAFE,
ste_intr, sc, &sc->ste_intrhand);
if (error) {
device_printf(dev, "couldn't set up irq\n");
ether_ifdetach(ifp);
goto fail;
}
fail:
if (error)
ste_detach(dev);
return(error);
}
/*
* Shutdown hardware and free up resources. This can be called any
* time after the mutex has been initialized. It is called in both
* the error case in attach and the normal detach case so it needs
* to be careful about only freeing resources that have actually been
* allocated.
*/
static int
ste_detach(dev)
device_t dev;
{
struct ste_softc *sc;
struct ifnet *ifp;
sc = device_get_softc(dev);
KASSERT(mtx_initialized(&sc->ste_mtx), ("ste mutex not initialized"));
ifp = sc->ste_ifp;
#ifdef DEVICE_POLLING
if (ifp->if_capenable & IFCAP_POLLING)
ether_poll_deregister(ifp);
#endif
/* These should only be active if attach succeeded */
if (device_is_attached(dev)) {
STE_LOCK(sc);
ste_stop(sc);
STE_UNLOCK(sc);
callout_drain(&sc->ste_stat_callout);
ether_ifdetach(ifp);
}
if (sc->ste_miibus)
device_delete_child(dev, sc->ste_miibus);
bus_generic_detach(dev);
if (sc->ste_intrhand)
bus_teardown_intr(dev, sc->ste_irq, sc->ste_intrhand);
if (sc->ste_irq)
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->ste_irq);
if (sc->ste_res)
bus_release_resource(dev, STE_RES, STE_RID, sc->ste_res);
if (ifp)
if_free(ifp);
if (sc->ste_ldata) {
contigfree(sc->ste_ldata, sizeof(struct ste_list_data),
M_DEVBUF);
}
mtx_destroy(&sc->ste_mtx);
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)
return(ENOBUFS);
MCLGET(m_new, M_DONTWAIT);
if (!(m_new->m_flags & M_EXT)) {
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 + ETHER_VLAN_ENCAP_LEN) | 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]);
}
ld->ste_rx_list[i].ste_status = 0;
}
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];
cd->ste_tx_chain[i].ste_ptr->ste_next = 0;
cd->ste_tx_chain[i].ste_ptr->ste_ctl = 0;
cd->ste_tx_chain[i].ste_phys = vtophys(&ld->ste_tx_list[i]);
if (i == (STE_TX_LIST_CNT - 1))
cd->ste_tx_chain[i].ste_next =
&cd->ste_tx_chain[0];
else
cd->ste_tx_chain[i].ste_next =
&cd->ste_tx_chain[i + 1];
}
cd->ste_tx_prod = 0;
cd->ste_tx_cons = 0;
return;
}
static void
ste_init(xsc)
void *xsc;
{
struct ste_softc *sc;
sc = xsc;
STE_LOCK(sc);
ste_init_locked(sc);
STE_UNLOCK(sc);
}
static void
ste_init_locked(sc)
struct ste_softc *sc;
{
int i;
struct ifnet *ifp;
STE_LOCK_ASSERT(sc);
ifp = sc->ste_ifp;
ste_stop(sc);
/* Init our MAC address */
for (i = 0; i < ETHER_ADDR_LEN; i++) {
CSR_WRITE_1(sc, STE_PAR0 + i, IF_LLADDR(sc->ste_ifp)[i]);
}
/* Init RX list */
if (ste_init_rx_list(sc) == ENOBUFS) {
if_printf(ifp,
"initialization failed: no memory for RX buffers\n");
ste_stop(sc);
return;
}
/* Set RX polling interval */
CSR_WRITE_1(sc, STE_RX_DMAPOLL_PERIOD, 64);
/* 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. */
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);
/* Set TX polling interval (defer until we TX first packet */
CSR_WRITE_1(sc, STE_TX_DMAPOLL_PERIOD, 0);
/* Load address of the TX list */
STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_TXDMA_STALL);
ste_wait(sc);
CSR_WRITE_4(sc, STE_TX_DMALIST_PTR, 0);
STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_TXDMA_UNSTALL);
STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_TXDMA_UNSTALL);
ste_wait(sc);
sc->ste_tx_prev = NULL;
/* Enable receiver and transmitter */
CSR_WRITE_2(sc, STE_MACCTL0, 0);
CSR_WRITE_2(sc, STE_MACCTL1, 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);
CSR_WRITE_2(sc, STE_ISR, 0xFFFF);
#ifdef DEVICE_POLLING
/* Disable interrupts if we are polling. */
if (ifp->if_capenable & IFCAP_POLLING)
CSR_WRITE_2(sc, STE_IMR, 0);
else
#endif
/* Enable interrupts. */
CSR_WRITE_2(sc, STE_IMR, STE_INTRS);
/* Accept VLAN length packets */
CSR_WRITE_2(sc, STE_MAX_FRAMELEN, ETHER_MAX_LEN + ETHER_VLAN_ENCAP_LEN);
ste_ifmedia_upd_locked(ifp);
ifp->if_drv_flags |= IFF_DRV_RUNNING;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
callout_reset(&sc->ste_stat_callout, hz, ste_stats_update, sc);
return;
}
static void
ste_stop(sc)
struct ste_softc *sc;
{
int i;
struct ifnet *ifp;
STE_LOCK_ASSERT(sc);
ifp = sc->ste_ifp;
callout_stop(&sc->ste_stat_callout);
ifp->if_drv_flags &= ~(IFF_DRV_RUNNING|IFF_DRV_OACTIVE);
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);
/*
* Try really hard to stop the RX engine or under heavy RX
* data chip will write into de-allocated memory.
*/
ste_reset(sc);
sc->ste_link = 0;
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;
}
}
bzero(sc->ste_ldata, sizeof(struct ste_list_data));
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)
if_printf(sc->ste_ifp, "global reset never completed\n");
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;
sc = ifp->if_softc;
ifr = (struct ifreq *)data;
switch(command) {
case SIOCSIFFLAGS:
STE_LOCK(sc);
if (ifp->if_flags & IFF_UP) {
if (ifp->if_drv_flags & IFF_DRV_RUNNING &&
ifp->if_flags & IFF_PROMISC &&
!(sc->ste_if_flags & IFF_PROMISC)) {
STE_SETBIT1(sc, STE_RX_MODE,
STE_RXMODE_PROMISC);
} else if (ifp->if_drv_flags & IFF_DRV_RUNNING &&
!(ifp->if_flags & IFF_PROMISC) &&
sc->ste_if_flags & IFF_PROMISC) {
STE_CLRBIT1(sc, STE_RX_MODE,
STE_RXMODE_PROMISC);
}
if (ifp->if_drv_flags & IFF_DRV_RUNNING &&
(ifp->if_flags ^ sc->ste_if_flags) & IFF_ALLMULTI)
ste_setmulti(sc);
if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
sc->ste_tx_thresh = STE_TXSTART_THRESH;
ste_init_locked(sc);
}
} else {
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
ste_stop(sc);
}
sc->ste_if_flags = ifp->if_flags;
STE_UNLOCK(sc);
error = 0;
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
STE_LOCK(sc);
ste_setmulti(sc);
STE_UNLOCK(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;
case SIOCSIFCAP:
#ifdef DEVICE_POLLING
if (ifr->ifr_reqcap & IFCAP_POLLING &&
!(ifp->if_capenable & IFCAP_POLLING)) {
error = ether_poll_register(ste_poll, ifp);
if (error)
return(error);
STE_LOCK(sc);
/* Disable interrupts */
CSR_WRITE_2(sc, STE_IMR, 0);
ifp->if_capenable |= IFCAP_POLLING;
STE_UNLOCK(sc);
return (error);
}
if (!(ifr->ifr_reqcap & IFCAP_POLLING) &&
ifp->if_capenable & IFCAP_POLLING) {
error = ether_poll_deregister(ifp);
/* Enable interrupts. */
STE_LOCK(sc);
CSR_WRITE_2(sc, STE_IMR, STE_INTRS);
ifp->if_capenable &= ~IFCAP_POLLING;
STE_UNLOCK(sc);
return (error);
}
#endif /* DEVICE_POLLING */
break;
default:
error = ether_ioctl(ifp, command, data);
break;
}
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;
struct mbuf *m;
struct ste_desc *d;
d = c->ste_ptr;
d->ste_ctl = 0;
encap_retry:
for (m = m_head, frag = 0; m != NULL; m = m->m_next) {
if (m->m_len != 0) {
if (frag == STE_MAXFRAGS)
break;
f = &d->ste_frags[frag];
f->ste_addr = vtophys(mtod(m, vm_offset_t));
f->ste_len = m->m_len;
frag++;
}
}
if (m != NULL) {
struct mbuf *mn;
/*
* We ran out of segments. We have to recopy this
* mbuf chain first. Bail out if we can't get the
* new buffers.
*/
mn = m_defrag(m_head, M_DONTWAIT);
if (mn == NULL) {
m_freem(m_head);
return ENOMEM;
}
m_head = mn;
goto encap_retry;
}
c->ste_mbuf = m_head;
d->ste_frags[frag - 1].ste_len |= STE_FRAG_LAST;
d->ste_ctl = 1;
return(0);
}
static void
ste_start(ifp)
struct ifnet *ifp;
{
struct ste_softc *sc;
sc = ifp->if_softc;
STE_LOCK(sc);
ste_start_locked(ifp);
STE_UNLOCK(sc);
}
static void
ste_start_locked(ifp)
struct ifnet *ifp;
{
struct ste_softc *sc;
struct mbuf *m_head = NULL;
struct ste_chain *cur_tx;
int idx;
sc = ifp->if_softc;
STE_LOCK_ASSERT(sc);
if (!sc->ste_link)
return;
if (ifp->if_drv_flags & IFF_DRV_OACTIVE)
return;
idx = sc->ste_cdata.ste_tx_prod;
while(sc->ste_cdata.ste_tx_chain[idx].ste_mbuf == NULL) {
/*
* We cannot re-use the last (free) descriptor;
* the chip may not have read its ste_next yet.
*/
if (STE_NEXT(idx, STE_TX_LIST_CNT) ==
sc->ste_cdata.ste_tx_cons) {
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
break;
}
IFQ_DRV_DEQUEUE(&ifp->if_snd, m_head);
if (m_head == NULL)
break;
cur_tx = &sc->ste_cdata.ste_tx_chain[idx];
if (ste_encap(sc, cur_tx, m_head) != 0)
break;
cur_tx->ste_ptr->ste_next = 0;
if (sc->ste_tx_prev == NULL) {
cur_tx->ste_ptr->ste_ctl = STE_TXCTL_DMAINTR | 1;
/* Load address of the TX list */
STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_TXDMA_STALL);
ste_wait(sc);
CSR_WRITE_4(sc, STE_TX_DMALIST_PTR,
vtophys(&sc->ste_ldata->ste_tx_list[0]));
/* Set TX polling interval to start TX engine */
CSR_WRITE_1(sc, STE_TX_DMAPOLL_PERIOD, 64);
STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_TXDMA_UNSTALL);
ste_wait(sc);
}else{
cur_tx->ste_ptr->ste_ctl = STE_TXCTL_DMAINTR | 1;
sc->ste_tx_prev->ste_ptr->ste_next
= cur_tx->ste_phys;
}
sc->ste_tx_prev = cur_tx;
/*
* If there's a BPF listener, bounce a copy of this frame
* to him.
*/
BPF_MTAP(ifp, cur_tx->ste_mbuf);
STE_INC(idx, STE_TX_LIST_CNT);
ifp->if_timer = 5;
}
sc->ste_cdata.ste_tx_prod = idx;
return;
}
static void
ste_watchdog(ifp)
struct ifnet *ifp;
{
struct ste_softc *sc;
sc = ifp->if_softc;
STE_LOCK(sc);
ifp->if_oerrors++;
if_printf(ifp, "watchdog timeout\n");
ste_txeoc(sc);
ste_txeof(sc);
ste_rxeoc(sc);
ste_rxeof(sc);
ste_reset(sc);
ste_init_locked(sc);
if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
ste_start_locked(ifp);
STE_UNLOCK(sc);
return;
}
static void
ste_shutdown(dev)
device_t dev;
{
struct ste_softc *sc;
sc = device_get_softc(dev);
STE_LOCK(sc);
ste_stop(sc);
STE_UNLOCK(sc);
return;
}
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