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freebsd-skq/sys/pci/if_dm.c
Bill Paul 98a229f65e 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.
*
* $FreeBSD$
*/
/*
* Davicom DM9102 fast ethernet PCI NIC driver.
*
* Written by Bill Paul <wpaul@ee.columbia.edu>
* Electrical Engineering Department
* Columbia University, New York City
*/
/*
* The Davicom DM9102 is yet another DEC 21x4x clone. This one is actually
* a pretty faithful copy. Same RX filter programming, same SROM layout,
* same everything. Datasheets available from www.davicom8.com. Only
* MII-based transceivers are supported.
*
* The DM9102's DMA engine seems pretty weak. Multi-fragment transmits
* don't seem to work well, and on slow machines you get lots of RX
* overruns.
*/
#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 <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 <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>
#define DM_USEIOSPACE
#include <pci/if_dmreg.h>
/* "controller miibus0" required. See GENERIC if you get errors here. */
#include "miibus_if.h"
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif
/*
* Various supported device vendors/types and their names.
*/
static struct dm_type dm_devs[] = {
{ DM_VENDORID, DM_DEVICEID_DM9100, "Davicom DM9100 10/100BaseTX" },
{ DM_VENDORID, DM_DEVICEID_DM9102, "Davicom DM9102 10/100BaseTX" },
{ 0, 0, NULL }
};
static int dm_probe __P((device_t));
static int dm_attach __P((device_t));
static int dm_detach __P((device_t));
static int dm_newbuf __P((struct dm_softc *,
struct dm_desc *,
struct mbuf *));
static int dm_encap __P((struct dm_softc *,
struct mbuf **, u_int32_t *));
static void dm_rxeof __P((struct dm_softc *));
static void dm_rxeoc __P((struct dm_softc *));
static void dm_txeof __P((struct dm_softc *));
static void dm_intr __P((void *));
static void dm_tick __P((void *));
static void dm_start __P((struct ifnet *));
static int dm_ioctl __P((struct ifnet *, u_long, caddr_t));
static void dm_init __P((void *));
static void dm_stop __P((struct dm_softc *));
static void dm_watchdog __P((struct ifnet *));
static void dm_shutdown __P((device_t));
static int dm_ifmedia_upd __P((struct ifnet *));
static void dm_ifmedia_sts __P((struct ifnet *, struct ifmediareq *));
static void dm_delay __P((struct dm_softc *));
static void dm_eeprom_idle __P((struct dm_softc *));
static void dm_eeprom_putbyte __P((struct dm_softc *, int));
static void dm_eeprom_getword __P((struct dm_softc *, int, u_int16_t *));
static void dm_read_eeprom __P((struct dm_softc *, caddr_t, int,
int, int));
static void dm_mii_writebit __P((struct dm_softc *, int));
static int dm_mii_readbit __P((struct dm_softc *));
static void dm_mii_sync __P((struct dm_softc *));
static void dm_mii_send __P((struct dm_softc *, u_int32_t, int));
static int dm_mii_readreg __P((struct dm_softc *, struct dm_mii_frame *));
static int dm_mii_writereg __P((struct dm_softc *, struct dm_mii_frame *));
static int dm_miibus_readreg __P((device_t, int, int));
static int dm_miibus_writereg __P((device_t, int, int, int));
static void dm_miibus_statchg __P((device_t));
static u_int32_t dm_calchash __P((caddr_t));
static void dm_setfilt __P((struct dm_softc *));
static void dm_reset __P((struct dm_softc *));
static int dm_list_rx_init __P((struct dm_softc *));
static int dm_list_tx_init __P((struct dm_softc *));
#ifdef DM_USEIOSPACE
#define DM_RES SYS_RES_IOPORT
#define DM_RID DM_PCI_LOIO
#else
#define DM_RES SYS_RES_MEMORY
#define DM_RID DM_PCI_LOMEM
#endif
static device_method_t dm_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, dm_probe),
DEVMETHOD(device_attach, dm_attach),
DEVMETHOD(device_detach, dm_detach),
DEVMETHOD(device_shutdown, dm_shutdown),
/* bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_driver_added, bus_generic_driver_added),
/* MII interface */
DEVMETHOD(miibus_readreg, dm_miibus_readreg),
DEVMETHOD(miibus_writereg, dm_miibus_writereg),
DEVMETHOD(miibus_statchg, dm_miibus_statchg),
{ 0, 0 }
};
static driver_t dm_driver = {
"dm",
dm_methods,
sizeof(struct dm_softc)
};
static devclass_t dm_devclass;
DRIVER_MODULE(if_dm, pci, dm_driver, dm_devclass, 0, 0);
DRIVER_MODULE(miibus, dm, miibus_driver, miibus_devclass, 0, 0);
#define DM_SETBIT(sc, reg, x) \
CSR_WRITE_4(sc, reg, \
CSR_READ_4(sc, reg) | x)
#define DM_CLRBIT(sc, reg, x) \
CSR_WRITE_4(sc, reg, \
CSR_READ_4(sc, reg) & ~x)
#define SIO_SET(x) \
CSR_WRITE_4(sc, DM_SIO, \
CSR_READ_4(sc, DM_SIO) | x)
#define SIO_CLR(x) \
CSR_WRITE_4(sc, DM_SIO, \
CSR_READ_4(sc, DM_SIO) & ~x)
static void dm_delay(sc)
struct dm_softc *sc;
{
int idx;
for (idx = (300 / 33) + 1; idx > 0; idx--)
CSR_READ_4(sc, DM_BUSCTL);
}
static void dm_eeprom_idle(sc)
struct dm_softc *sc;
{
register int i;
CSR_WRITE_4(sc, DM_SIO, DM_SIO_EESEL);
dm_delay(sc);
DM_SETBIT(sc, DM_SIO, DM_SIO_ROMCTL_READ);
dm_delay(sc);
DM_SETBIT(sc, DM_SIO, DM_SIO_EE_CS);
dm_delay(sc);
DM_SETBIT(sc, DM_SIO, DM_SIO_EE_CLK);
dm_delay(sc);
for (i = 0; i < 25; i++) {
DM_CLRBIT(sc, DM_SIO, DM_SIO_EE_CLK);
dm_delay(sc);
DM_SETBIT(sc, DM_SIO, DM_SIO_EE_CLK);
dm_delay(sc);
}
DM_CLRBIT(sc, DM_SIO, DM_SIO_EE_CLK);
dm_delay(sc);
DM_CLRBIT(sc, DM_SIO, DM_SIO_EE_CS);
dm_delay(sc);
CSR_WRITE_4(sc, DM_SIO, 0x00000000);
return;
}
/*
* Send a read command and address to the EEPROM, check for ACK.
*/
static void dm_eeprom_putbyte(sc, addr)
struct dm_softc *sc;
int addr;
{
register int d, i;
d = addr | DM_EECMD_READ;
/*
* Feed in each bit and stobe the clock.
*/
for (i = 0x400; i; i >>= 1) {
if (d & i) {
SIO_SET(DM_SIO_EE_DATAIN);
} else {
SIO_CLR(DM_SIO_EE_DATAIN);
}
dm_delay(sc);
SIO_SET(DM_SIO_EE_CLK);
dm_delay(sc);
SIO_CLR(DM_SIO_EE_CLK);
dm_delay(sc);
}
return;
}
/*
* Read a word of data stored in the EEPROM at address 'addr.'
*/
static void dm_eeprom_getword(sc, addr, dest)
struct dm_softc *sc;
int addr;
u_int16_t *dest;
{
register int i;
u_int16_t word = 0;
/* Force EEPROM to idle state. */
dm_eeprom_idle(sc);
/* Enter EEPROM access mode. */
CSR_WRITE_4(sc, DM_SIO, DM_SIO_EESEL);
dm_delay(sc);
DM_SETBIT(sc, DM_SIO, DM_SIO_ROMCTL_READ);
dm_delay(sc);
DM_SETBIT(sc, DM_SIO, DM_SIO_EE_CS);
dm_delay(sc);
DM_SETBIT(sc, DM_SIO, DM_SIO_EE_CLK);
dm_delay(sc);
/*
* Send address of word we want to read.
*/
dm_eeprom_putbyte(sc, addr);
/*
* Start reading bits from EEPROM.
*/
for (i = 0x8000; i; i >>= 1) {
SIO_SET(DM_SIO_EE_CLK);
dm_delay(sc);
if (CSR_READ_4(sc, DM_SIO) & DM_SIO_EE_DATAOUT)
word |= i;
dm_delay(sc);
SIO_CLR(DM_SIO_EE_CLK);
dm_delay(sc);
}
/* Turn off EEPROM access mode. */
dm_eeprom_idle(sc);
*dest = word;
return;
}
/*
* Read a sequence of words from the EEPROM.
*/
static void dm_read_eeprom(sc, dest, off, cnt, swap)
struct dm_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++) {
dm_eeprom_getword(sc, off + i, &word);
ptr = (u_int16_t *)(dest + (i * 2));
if (swap)
*ptr = ntohs(word);
else
*ptr = word;
}
return;
}
/*
* Write a bit to the MII bus.
*/
static void dm_mii_writebit(sc, bit)
struct dm_softc *sc;
int bit;
{
if (bit)
CSR_WRITE_4(sc, DM_SIO, DM_SIO_ROMCTL_WRITE|DM_SIO_MII_DATAOUT);
else
CSR_WRITE_4(sc, DM_SIO, DM_SIO_ROMCTL_WRITE);
DM_SETBIT(sc, DM_SIO, DM_SIO_MII_CLK);
DM_CLRBIT(sc, DM_SIO, DM_SIO_MII_CLK);
return;
}
/*
* Read a bit from the MII bus.
*/
static int dm_mii_readbit(sc)
struct dm_softc *sc;
{
CSR_WRITE_4(sc, DM_SIO, DM_SIO_ROMCTL_READ|DM_SIO_MII_DIR);
CSR_READ_4(sc, DM_SIO);
DM_SETBIT(sc, DM_SIO, DM_SIO_MII_CLK);
DM_CLRBIT(sc, DM_SIO, DM_SIO_MII_CLK);
if (CSR_READ_4(sc, DM_SIO) & DM_SIO_MII_DATAIN)
return(1);
return(0);
}
/*
* Sync the PHYs by setting data bit and strobing the clock 32 times.
*/
static void dm_mii_sync(sc)
struct dm_softc *sc;
{
register int i;
CSR_WRITE_4(sc, DM_SIO, DM_SIO_ROMCTL_WRITE);
for (i = 0; i < 32; i++)
dm_mii_writebit(sc, 1);
return;
}
/*
* Clock a series of bits through the MII.
*/
static void dm_mii_send(sc, bits, cnt)
struct dm_softc *sc;
u_int32_t bits;
int cnt;
{
int i;
for (i = (0x1 << (cnt - 1)); i; i >>= 1)
dm_mii_writebit(sc, bits & i);
}
/*
* Read an PHY register through the MII.
*/
static int dm_mii_readreg(sc, frame)
struct dm_softc *sc;
struct dm_mii_frame *frame;
{
int i, ack, s;
s = splimp();
/*
* Set up frame for RX.
*/
frame->mii_stdelim = DM_MII_STARTDELIM;
frame->mii_opcode = DM_MII_READOP;
frame->mii_turnaround = 0;
frame->mii_data = 0;
/*
* Sync the PHYs.
*/
dm_mii_sync(sc);
/*
* Send command/address info.
*/
dm_mii_send(sc, frame->mii_stdelim, 2);
dm_mii_send(sc, frame->mii_opcode, 2);
dm_mii_send(sc, frame->mii_phyaddr, 5);
dm_mii_send(sc, frame->mii_regaddr, 5);
#ifdef notdef
/* Idle bit */
dm_mii_writebit(sc, 1);
dm_mii_writebit(sc, 0);
#endif
/* Check for ack */
ack = dm_mii_readbit(sc);
/*
* 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++) {
dm_mii_readbit(sc);
}
goto fail;
}
for (i = 0x8000; i; i >>= 1) {
if (!ack) {
if (dm_mii_readbit(sc))
frame->mii_data |= i;
}
}
fail:
dm_mii_writebit(sc, 0);
dm_mii_writebit(sc, 0);
splx(s);
if (ack)
return(1);
return(0);
}
/*
* Write to a PHY register through the MII.
*/
static int dm_mii_writereg(sc, frame)
struct dm_softc *sc;
struct dm_mii_frame *frame;
{
int s;
s = splimp();
/*
* Set up frame for TX.
*/
frame->mii_stdelim = DM_MII_STARTDELIM;
frame->mii_opcode = DM_MII_WRITEOP;
frame->mii_turnaround = DM_MII_TURNAROUND;
/*
* Sync the PHYs.
*/
dm_mii_sync(sc);
dm_mii_send(sc, frame->mii_stdelim, 2);
dm_mii_send(sc, frame->mii_opcode, 2);
dm_mii_send(sc, frame->mii_phyaddr, 5);
dm_mii_send(sc, frame->mii_regaddr, 5);
dm_mii_send(sc, frame->mii_turnaround, 2);
dm_mii_send(sc, frame->mii_data, 16);
/* Idle bit. */
dm_mii_writebit(sc, 0);
dm_mii_writebit(sc, 0);
splx(s);
return(0);
}
static int dm_miibus_readreg(dev, phy, reg)
device_t dev;
int phy, reg;
{
struct dm_softc *sc;
struct dm_mii_frame frame;
sc = device_get_softc(dev);
bzero((char *)&frame, sizeof(frame));
frame.mii_phyaddr = phy;
frame.mii_regaddr = reg;
dm_mii_readreg(sc, &frame);
return(frame.mii_data);
}
static int dm_miibus_writereg(dev, phy, reg, data)
device_t dev;
int phy, reg, data;
{
struct dm_softc *sc;
struct dm_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;
dm_mii_writereg(sc, &frame);
return(0);
}
static void dm_miibus_statchg(dev)
device_t dev;
{
struct dm_softc *sc;
struct mii_data *mii;
sc = device_get_softc(dev);
mii = device_get_softc(sc->dm_miibus);
if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T)
DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_SPEEDSEL);
else
DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_SPEEDSEL);
if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX)
DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_FULLDUPLEX);
else
DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_FULLDUPLEX);
return;
}
#define DM_POLY 0xEDB88320
#define DM_BITS 9
static u_int32_t dm_calchash(addr)
caddr_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) ? DM_POLY : 0);
}
return (crc & ((1 << DM_BITS) - 1));
}
void dm_setfilt(sc)
struct dm_softc *sc;
{
struct dm_desc *sframe;
u_int32_t h, *sp;
struct ifmultiaddr *ifma;
struct ifnet *ifp;
int i;
ifp = &sc->arpcom.ac_if;
DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_TX_ON);
DM_SETBIT(sc, DM_ISR, DM_ISR_TX_IDLE);
sframe = &sc->dm_ldata->dm_sframe;
sp = (u_int32_t *)&sc->dm_cdata.dm_sbuf;
bzero((char *)sp, DM_SFRAME_LEN);
sframe->dm_next = vtophys(&sc->dm_ldata->dm_tx_list[0]);
sframe->dm_data = vtophys(&sc->dm_cdata.dm_sbuf);
sframe->dm_ctl = DM_SFRAME_LEN | DM_TXCTL_TLINK |
DM_TXCTL_SETUP | DM_FILTER_HASHPERF;
/* If we want promiscuous mode, set the allframes bit. */
if (ifp->if_flags & IFF_PROMISC)
DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_RX_PROMISC);
else
DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_RX_PROMISC);
if (ifp->if_flags & IFF_ALLMULTI)
DM_SETBIT(sc, DM_NETCFG, DM_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 = dm_calchash(LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
sp[h >> 4] |= 1 << (h & 0xF);
}
if (ifp->if_flags & IFF_BROADCAST) {
h = dm_calchash((caddr_t)&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, DM_TXADDR, vtophys(sframe));
DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_TX_ON);
sframe->dm_status = DM_TXSTAT_OWN;
CSR_WRITE_4(sc, DM_TXSTART, 0xFFFFFFFF);
DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_TX_ON);
/*
* Wait for chip to clear the 'own' bit.
*/
for (i = 0; i < DM_TIMEOUT; i++) {
DELAY(10);
if (sframe->dm_status != DM_TXSTAT_OWN)
break;
}
if (i == DM_TIMEOUT)
printf("dm%d: failed to send setup frame\n", sc->dm_unit);
DM_SETBIT(sc, DM_ISR, DM_ISR_TX_NOBUF|DM_ISR_TX_IDLE);
return;
}
static void dm_reset(sc)
struct dm_softc *sc;
{
register int i;
DM_SETBIT(sc, DM_BUSCTL, DM_BUSCTL_RESET);
for (i = 0; i < DM_TIMEOUT; i++) {
DELAY(10);
if (!(CSR_READ_4(sc, DM_BUSCTL) & DM_BUSCTL_RESET))
break;
}
if (i == DM_TIMEOUT)
printf("dm%d: reset never completed!\n", sc->dm_unit);
CSR_WRITE_4(sc, DM_BUSCTL, 0);
/* Wait a little while for the chip to get its brains in order. */
DELAY(1000);
return;
}
/*
* Probe for an Davicom chip. Check the PCI vendor and device
* IDs against our list and return a device name if we find a match.
*/
static int dm_probe(dev)
device_t dev;
{
struct dm_type *t;
t = dm_devs;
while(t->dm_name != NULL) {
if ((pci_get_vendor(dev) == t->dm_vid) &&
(pci_get_device(dev) == t->dm_did)) {
device_set_desc(dev, t->dm_name);
return(0);
}
t++;
}
return(ENXIO);
}
/*
* Attach the interface. Allocate softc structures, do ifmedia
* setup and ethernet/BPF attach.
*/
static int dm_attach(dev)
device_t dev;
{
int s;
u_char eaddr[ETHER_ADDR_LEN];
u_int32_t command;
struct dm_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 dm_softc));
/*
* Handle power management nonsense.
*/
command = pci_read_config(dev, DM_PCI_CAPID, 4) & 0x000000FF;
if (command == 0x01) {
command = pci_read_config(dev, DM_PCI_PWRMGMTCTRL, 4);
if (command & DM_PSTATE_MASK) {
u_int32_t iobase, membase, irq;
/* Save important PCI config data. */
iobase = pci_read_config(dev, DM_PCI_LOIO, 4);
membase = pci_read_config(dev, DM_PCI_LOMEM, 4);
irq = pci_read_config(dev, DM_PCI_INTLINE, 4);
/* Reset the power state. */
printf("dm%d: chip is in D%d power mode "
"-- setting to D0\n", unit, command & DM_PSTATE_MASK);
command &= 0xFFFFFFFC;
pci_write_config(dev, DM_PCI_PWRMGMTCTRL, command, 4);
/* Restore PCI config data. */
pci_write_config(dev, DM_PCI_LOIO, iobase, 4);
pci_write_config(dev, DM_PCI_LOMEM, membase, 4);
pci_write_config(dev, DM_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 DM_USEIOSPACE
if (!(command & PCIM_CMD_PORTEN)) {
printf("dm%d: failed to enable I/O ports!\n", unit);
error = ENXIO;;
goto fail;
}
#else
if (!(command & PCIM_CMD_MEMEN)) {
printf("dm%d: failed to enable memory mapping!\n", unit);
error = ENXIO;;
goto fail;
}
#endif
rid = DM_RID;
sc->dm_res = bus_alloc_resource(dev, DM_RES, &rid,
0, ~0, 1, RF_ACTIVE);
if (sc->dm_res == NULL) {
printf("dm%d: couldn't map ports/memory\n", unit);
error = ENXIO;
goto fail;
}
sc->dm_btag = rman_get_bustag(sc->dm_res);
sc->dm_bhandle = rman_get_bushandle(sc->dm_res);
/* Allocate interrupt */
rid = 0;
sc->dm_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
RF_SHAREABLE | RF_ACTIVE);
if (sc->dm_irq == NULL) {
printf("dm%d: couldn't map interrupt\n", unit);
bus_release_resource(dev, DM_RES, DM_RID, sc->dm_res);
error = ENXIO;
goto fail;
}
error = bus_setup_intr(dev, sc->dm_irq, INTR_TYPE_NET,
dm_intr, sc, &sc->dm_intrhand);
if (error) {
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->dm_res);
bus_release_resource(dev, DM_RES, DM_RID, sc->dm_res);
printf("dm%d: couldn't set up irq\n", unit);
goto fail;
}
/* Save the cache line size. */
sc->dm_cachesize = pci_read_config(dev, DM_PCI_CACHELEN, 4) & 0xFF;
/* Reset the adapter. */
dm_reset(sc);
/*
* Get station address from the EEPROM.
*/
dm_read_eeprom(sc, (caddr_t)&eaddr, DM_EE_NODEADDR, 3, 0);
/*
* A Davicom chip was detected. Inform the world.
*/
printf("dm%d: Ethernet address: %6D\n", unit, eaddr, ":");
sc->dm_unit = unit;
callout_handle_init(&sc->dm_stat_ch);
bcopy(eaddr, (char *)&sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
sc->dm_ldata = contigmalloc(sizeof(struct dm_list_data), M_DEVBUF,
M_NOWAIT, 0x100000, 0xffffffff, PAGE_SIZE, 0);
if (sc->dm_ldata == NULL) {
printf("dm%d: no memory for list buffers!\n", unit);
bus_teardown_intr(dev, sc->dm_irq, sc->dm_intrhand);
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->dm_irq);
bus_release_resource(dev, DM_RES, DM_RID, sc->dm_res);
error = ENXIO;
goto fail;
}
bzero(sc->dm_ldata, sizeof(struct dm_list_data));
ifp = &sc->arpcom.ac_if;
ifp->if_softc = sc;
ifp->if_unit = unit;
ifp->if_name = "dm";
ifp->if_mtu = ETHERMTU;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = dm_ioctl;
ifp->if_output = ether_output;
ifp->if_start = dm_start;
ifp->if_watchdog = dm_watchdog;
ifp->if_init = dm_init;
ifp->if_baudrate = 10000000;
ifp->if_snd.ifq_maxlen = DM_TX_LIST_CNT - 1;
/*
* Do MII setup.
*/
if (mii_phy_probe(dev, &sc->dm_miibus,
dm_ifmedia_upd, dm_ifmedia_sts)) {
printf("dm%d: MII without any PHY!\n", sc->dm_unit);
bus_teardown_intr(dev, sc->dm_irq, sc->dm_intrhand);
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->dm_irq);
bus_release_resource(dev, DM_RES, DM_RID, sc->dm_res);
error = ENXIO;
goto fail;
}
/*
* 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 dm_detach(dev)
device_t dev;
{
struct dm_softc *sc;
struct ifnet *ifp;
int s;
s = splimp();
sc = device_get_softc(dev);
ifp = &sc->arpcom.ac_if;
dm_reset(sc);
dm_stop(sc);
if_detach(ifp);
bus_generic_detach(dev);
device_delete_child(dev, sc->dm_miibus);
bus_teardown_intr(dev, sc->dm_irq, sc->dm_intrhand);
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->dm_irq);
bus_release_resource(dev, DM_RES, DM_RID, sc->dm_res);
contigfree(sc->dm_ldata, sizeof(struct dm_list_data), M_DEVBUF);
splx(s);
return(0);
}
/*
* Initialize the transmit descriptors.
*/
static int dm_list_tx_init(sc)
struct dm_softc *sc;
{
struct dm_chain_data *cd;
struct dm_list_data *ld;
int i;
cd = &sc->dm_cdata;
ld = sc->dm_ldata;
for (i = 0; i < DM_TX_LIST_CNT; i++) {
if (i == (DM_TX_LIST_CNT - 1)) {
ld->dm_tx_list[i].dm_nextdesc =
&ld->dm_tx_list[0];
ld->dm_tx_list[i].dm_next =
vtophys(&ld->dm_tx_list[0]);
} else {
ld->dm_tx_list[i].dm_nextdesc =
&ld->dm_tx_list[i + 1];
ld->dm_tx_list[i].dm_next =
vtophys(&ld->dm_tx_list[i + 1]);
}
ld->dm_tx_list[i].dm_mbuf = NULL;
ld->dm_tx_list[i].dm_data = 0;
ld->dm_tx_list[i].dm_ctl = 0;
}
cd->dm_tx_prod = cd->dm_tx_cons = cd->dm_tx_cnt = 0;
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 dm_list_rx_init(sc)
struct dm_softc *sc;
{
struct dm_chain_data *cd;
struct dm_list_data *ld;
int i;
cd = &sc->dm_cdata;
ld = sc->dm_ldata;
for (i = 0; i < DM_RX_LIST_CNT; i++) {
if (dm_newbuf(sc, &ld->dm_rx_list[i], NULL) == ENOBUFS)
return(ENOBUFS);
if (i == (DM_RX_LIST_CNT - 1)) {
ld->dm_rx_list[i].dm_nextdesc =
&ld->dm_rx_list[0];
ld->dm_rx_list[i].dm_next =
vtophys(&ld->dm_rx_list[0]);
} else {
ld->dm_rx_list[i].dm_nextdesc =
&ld->dm_rx_list[i + 1];
ld->dm_rx_list[i].dm_next =
vtophys(&ld->dm_rx_list[i + 1]);
}
}
cd->dm_rx_prod = 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 dm_newbuf(sc, c, m)
struct dm_softc *sc;
struct dm_desc *c;
struct mbuf *m;
{
struct mbuf *m_new = NULL;
if (m == NULL) {
MGETHDR(m_new, M_DONTWAIT, MT_DATA);
if (m_new == NULL) {
printf("dm%d: no memory for rx list "
"-- packet dropped!\n", sc->dm_unit);
return(ENOBUFS);
}
MCLGET(m_new, M_DONTWAIT);
if (!(m_new->m_flags & M_EXT)) {
printf("dm%d: no memory for rx list "
"-- packet dropped!\n", sc->dm_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, sizeof(u_int64_t));
c->dm_mbuf = m_new;
c->dm_data = vtophys(mtod(m_new, caddr_t));
c->dm_ctl = DM_RXCTL_RLINK | DM_RXLEN;
c->dm_status = DM_RXSTAT_OWN;
return(0);
}
/*
* A frame has been uploaded: pass the resulting mbuf chain up to
* the higher level protocols.
*/
static void dm_rxeof(sc)
struct dm_softc *sc;
{
struct ether_header *eh;
struct mbuf *m;
struct ifnet *ifp;
struct dm_desc *cur_rx;
int i, total_len = 0;
u_int32_t rxstat;
ifp = &sc->arpcom.ac_if;
i = sc->dm_cdata.dm_rx_prod;
while(!(sc->dm_ldata->dm_rx_list[i].dm_status & DM_RXSTAT_OWN)) {
struct mbuf *m0 = NULL;
cur_rx = &sc->dm_ldata->dm_rx_list[i];
rxstat = cur_rx->dm_status;
m = cur_rx->dm_mbuf;
cur_rx->dm_mbuf = NULL;
total_len = DM_RXBYTES(rxstat);
DM_INC(i, DM_RX_LIST_CNT);
/*
* 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 & DM_RXSTAT_RXERR) {
ifp->if_ierrors++;
if (rxstat & DM_RXSTAT_COLLSEEN)
ifp->if_collisions++;
dm_newbuf(sc, cur_rx, m);
dm_init(sc);
return;
}
/* No errors; receive the packet. */
total_len -= ETHER_CRC_LEN;
m0 = m_devget(mtod(m, char *) - ETHER_ALIGN,
total_len + ETHER_ALIGN, 0, ifp, NULL);
dm_newbuf(sc, cur_rx, m);
if (m0 == NULL) {
ifp->if_ierrors++;
continue;
}
m_adj(m0, ETHER_ALIGN);
m = m0;
ifp->if_ipackets++;
eh = mtod(m, struct ether_header *);
/*
* 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;
}
}
/* Remove header from mbuf and pass it on. */
m_adj(m, sizeof(struct ether_header));
ether_input(ifp, eh, m);
}
sc->dm_cdata.dm_rx_prod = i;
return;
}
void dm_rxeoc(sc)
struct dm_softc *sc;
{
dm_rxeof(sc);
DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_RX_ON);
CSR_WRITE_4(sc, DM_RXSTART, 0xFFFFFFFF);
return;
}
/*
* A frame was downloaded to the chip. It's safe for us to clean up
* the list buffers.
*/
static void dm_txeof(sc)
struct dm_softc *sc;
{
struct dm_desc *cur_tx = NULL;
struct ifnet *ifp;
int idx;
ifp = &sc->arpcom.ac_if;
/* Clear the timeout timer. */
ifp->if_timer = 0;
/*
* Go through our tx list and free mbufs for those
* frames that have been transmitted.
*/
idx = sc->dm_cdata.dm_tx_cons;
while(idx != sc->dm_cdata.dm_tx_prod) {
u_int32_t txstat;
cur_tx = &sc->dm_ldata->dm_tx_list[idx];
txstat = cur_tx->dm_status;
if (txstat & DM_TXSTAT_OWN)
break;
if (!(cur_tx->dm_ctl & DM_TXCTL_LASTFRAG)) {
sc->dm_cdata.dm_tx_cnt--;
DM_INC(idx, DM_TX_LIST_CNT);
continue;
}
if (txstat & DM_TXSTAT_ERRSUM) {
ifp->if_oerrors++;
if (txstat & DM_TXSTAT_EXCESSCOLL)
ifp->if_collisions++;
if (txstat & DM_TXSTAT_LATECOLL)
ifp->if_collisions++;
dm_init(sc);
return;
}
ifp->if_collisions += (txstat & DM_TXSTAT_COLLCNT) >> 3;
ifp->if_opackets++;
if (cur_tx->dm_mbuf != NULL) {
m_freem(cur_tx->dm_mbuf);
cur_tx->dm_mbuf = NULL;
}
sc->dm_cdata.dm_tx_cnt--;
DM_INC(idx, DM_TX_LIST_CNT);
ifp->if_timer = 0;
}
sc->dm_cdata.dm_tx_cons = idx;
if (cur_tx != NULL)
ifp->if_flags &= ~IFF_OACTIVE;
return;
}
static void dm_tick(xsc)
void *xsc;
{
struct dm_softc *sc;
struct mii_data *mii;
int s;
s = splimp();
sc = xsc;
mii = device_get_softc(sc->dm_miibus);
mii_tick(mii);
sc->dm_stat_ch = timeout(dm_tick, sc, hz);
splx(s);
return;
}
static void dm_intr(arg)
void *arg;
{
struct dm_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)) {
dm_stop(sc);
return;
}
/* Disable interrupts. */
CSR_WRITE_4(sc, DM_IMR, 0x00000000);
for (;;) {
status = CSR_READ_4(sc, DM_ISR);
if (status)
CSR_WRITE_4(sc, DM_ISR, status);
if ((status & DM_INTRS) == 0)
break;
if ((status & DM_ISR_TX_OK) || (status & DM_ISR_TX_EARLY))
dm_txeof(sc);
if (status & DM_ISR_TX_NOBUF)
dm_txeof(sc);
if (status & DM_ISR_TX_IDLE) {
dm_txeof(sc);
if (sc->dm_cdata.dm_tx_cnt) {
DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_TX_ON);
CSR_WRITE_4(sc, DM_TXSTART, 0xFFFFFFFF);
}
}
if (status & DM_ISR_TX_UNDERRUN) {
u_int32_t cfg;
cfg = CSR_READ_4(sc, DM_NETCFG);
if ((cfg & DM_NETCFG_TX_THRESH) == DM_TXTHRESH_160BYTES)
DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_STORENFWD);
else
CSR_WRITE_4(sc, DM_NETCFG, cfg + 0x4000);
}
if (status & DM_ISR_RX_OK) {
dm_rxeof(sc);
DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_RX_ON);
CSR_WRITE_4(sc, DM_RXSTART, 0xFFFFFFFF);
}
if ((status & DM_ISR_RX_WATDOGTIMEO)
|| (status & DM_ISR_RX_NOBUF))
dm_rxeoc(sc);
if (status & DM_ISR_BUS_ERR) {
dm_reset(sc);
dm_init(sc);
}
}
/* Re-enable interrupts. */
CSR_WRITE_4(sc, DM_IMR, DM_INTRS);
if (ifp->if_snd.ifq_head != NULL)
dm_start(ifp);
return;
}
/*
* Encapsulate an mbuf chain in a descriptor by coupling the mbuf data
* pointers to the fragment pointers.
*/
static int dm_encap(sc, m_head, txidx)
struct dm_softc *sc;
struct mbuf **m_head;
u_int32_t *txidx;
{
struct dm_desc *f = NULL;
struct mbuf *m;
int frag, cur, cnt = 0;
struct mbuf *m_new = NULL;
m = *m_head;
MGETHDR(m_new, M_DONTWAIT, MT_DATA);
if (m_new == NULL) {
printf("dm%d: no memory for tx list", sc->dm_unit);
return(ENOBUFS);
}
if (m->m_pkthdr.len > MHLEN) {
MCLGET(m_new, M_DONTWAIT);
if (!(m_new->m_flags & M_EXT)) {
m_freem(m_new);
printf("dm%d: no memory for tx list", sc->dm_unit);
return(ENOBUFS);
}
}
m_copydata(m, 0, m->m_pkthdr.len, mtod(m_new, caddr_t));
m_new->m_pkthdr.len = m_new->m_len = m->m_pkthdr.len;
m_freem(m);
*m_head = m_new;
/*
* 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.
*/
cur = frag = *txidx;
for (m = m_new; m != NULL; m = m->m_next) {
if (m->m_len != 0) {
if ((DM_TX_LIST_CNT -
(sc->dm_cdata.dm_tx_cnt + cnt)) < 2)
return(ENOBUFS);
f = &sc->dm_ldata->dm_tx_list[frag];
f->dm_ctl = DM_TXCTL_TLINK | m->m_len;
if (cnt == 0) {
f->dm_status = 0;
f->dm_ctl |= DM_TXCTL_FIRSTFRAG;
} else
f->dm_status = DM_TXSTAT_OWN;
f->dm_data = vtophys(mtod(m, vm_offset_t));
cur = frag;
DM_INC(frag, DM_TX_LIST_CNT);
cnt++;
}
}
if (m != NULL)
return(ENOBUFS);
sc->dm_ldata->dm_tx_list[cur].dm_mbuf = *m_head;
sc->dm_ldata->dm_tx_list[cur].dm_ctl |=
DM_TXCTL_LASTFRAG|DM_TXCTL_FINT;
sc->dm_ldata->dm_tx_list[*txidx].dm_status |= DM_TXSTAT_OWN;
sc->dm_cdata.dm_tx_cnt += cnt;
*txidx = frag;
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 dm_start(ifp)
struct ifnet *ifp;
{
struct dm_softc *sc;
struct mbuf *m_head = NULL;
u_int32_t idx;
sc = ifp->if_softc;
if (ifp->if_flags & IFF_OACTIVE)
return;
idx = sc->dm_cdata.dm_tx_prod;
while(sc->dm_ldata->dm_tx_list[idx].dm_mbuf == NULL) {
IF_DEQUEUE(&ifp->if_snd, m_head);
if (m_head == NULL)
break;
if (dm_encap(sc, &m_head, &idx)) {
IF_PREPEND(&ifp->if_snd, m_head);
ifp->if_flags |= IFF_OACTIVE;
break;
}
/*
* If there's a BPF listener, bounce a copy of this frame
* to him.
*/
if (ifp->if_bpf)
bpf_mtap(ifp, m_head);
}
sc->dm_cdata.dm_tx_prod = idx;
CSR_WRITE_4(sc, DM_TXSTART, 0xFFFFFFFF);
/*
* Set a timeout in case the chip goes out to lunch.
*/
ifp->if_timer = 5;
return;
}
static void dm_init(xsc)
void *xsc;
{
struct dm_softc *sc = xsc;
struct ifnet *ifp = &sc->arpcom.ac_if;
struct mii_data *mii;
int s;
s = splimp();
/*
* Cancel pending I/O and free all RX/TX buffers.
*/
dm_stop(sc);
dm_reset(sc);
mii = device_get_softc(sc->dm_miibus);
/*
* Set cache alignment and burst length.
*/
CSR_WRITE_4(sc, DM_BUSCTL, DM_BURSTLEN_32LONG);
switch(sc->dm_cachesize) {
case 32:
DM_SETBIT(sc, DM_BUSCTL, DM_CACHEALIGN_32LONG);
break;
case 16:
DM_SETBIT(sc, DM_BUSCTL, DM_CACHEALIGN_16LONG);
break;
case 8:
DM_SETBIT(sc, DM_BUSCTL, DM_CACHEALIGN_8LONG);
break;
case 0:
default:
DM_SETBIT(sc, DM_BUSCTL, DM_CACHEALIGN_NONE);
break;
}
DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_HEARTBEAT);
DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_STORENFWD);
DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_TX_THRESH);
DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_SPEEDSEL);
if (IFM_SUBTYPE(mii->mii_media.ifm_media) == IFM_10_T)
DM_SETBIT(sc, DM_NETCFG, DM_TXTHRESH_160BYTES);
else
DM_SETBIT(sc, DM_NETCFG, DM_TXTHRESH_72BYTES);
/* Init circular RX list. */
if (dm_list_rx_init(sc) == ENOBUFS) {
printf("dm%d: initialization failed: no "
"memory for rx buffers\n", sc->dm_unit);
dm_stop(sc);
(void)splx(s);
return;
}
/*
* Init tx descriptors.
*/
dm_list_tx_init(sc);
/* If we want promiscuous mode, set the allframes bit. */
if (ifp->if_flags & IFF_PROMISC) {
DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_RX_PROMISC);
} else {
DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_RX_PROMISC);
}
/*
* Set the capture broadcast bit to capture broadcast frames.
*/
if (ifp->if_flags & IFF_BROADCAST) {
DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_RX_BROAD);
} else {
DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_RX_BROAD);
}
/*
* Load the RX/multicast filter.
*/
dm_setfilt(sc);
/*
* Load the address of the RX and TX lists.
*/
CSR_WRITE_4(sc, DM_RXADDR, vtophys(&sc->dm_ldata->dm_rx_list[0]));
/*CSR_WRITE_4(sc, DM_TXADDR, vtophys(&sc->dm_ldata->dm_tx_list[0]));*/
/*
* Enable interrupts.
*/
CSR_WRITE_4(sc, DM_IMR, DM_INTRS);
CSR_WRITE_4(sc, DM_ISR, 0xFFFFFFFF);
/* Enable receiver and transmitter. */
DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_TX_ON|DM_NETCFG_RX_ON);
CSR_WRITE_4(sc, DM_RXSTART, 0xFFFFFFFF);
mii_mediachg(mii);
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
(void)splx(s);
sc->dm_stat_ch = timeout(dm_tick, sc, hz);
return;
}
/*
* Set media options.
*/
static int dm_ifmedia_upd(ifp)
struct ifnet *ifp;
{
struct dm_softc *sc;
sc = ifp->if_softc;
if (ifp->if_flags & IFF_UP)
dm_init(sc);
return(0);
}
/*
* Report current media status.
*/
static void dm_ifmedia_sts(ifp, ifmr)
struct ifnet *ifp;
struct ifmediareq *ifmr;
{
struct dm_softc *sc;
struct mii_data *mii;
sc = ifp->if_softc;
mii = device_get_softc(sc->dm_miibus);
mii_pollstat(mii);
ifmr->ifm_active = mii->mii_media_active;
ifmr->ifm_status = mii->mii_media_status;
return;
}
static int dm_ioctl(ifp, command, data)
struct ifnet *ifp;
u_long command;
caddr_t data;
{
struct dm_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *) data;
struct mii_data *mii;
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) {
dm_init(sc);
} else {
if (ifp->if_flags & IFF_RUNNING)
dm_stop(sc);
}
error = 0;
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
dm_init(sc);
error = 0;
break;
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
mii = device_get_softc(sc->dm_miibus);
error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
break;
default:
error = EINVAL;
break;
}
(void)splx(s);
return(error);
}
static void dm_watchdog(ifp)
struct ifnet *ifp;
{
struct dm_softc *sc;
sc = ifp->if_softc;
ifp->if_oerrors++;
printf("dm%d: watchdog timeout\n", sc->dm_unit);
dm_stop(sc);
dm_reset(sc);
dm_init(sc);
if (ifp->if_snd.ifq_head != NULL)
dm_start(ifp);
return;
}
/*
* Stop the adapter and free any mbufs allocated to the
* RX and TX lists.
*/
static void dm_stop(sc)
struct dm_softc *sc;
{
register int i;
struct ifnet *ifp;
ifp = &sc->arpcom.ac_if;
ifp->if_timer = 0;
untimeout(dm_tick, sc, sc->dm_stat_ch);
DM_CLRBIT(sc, DM_NETCFG, (DM_NETCFG_RX_ON|DM_NETCFG_TX_ON));
CSR_WRITE_4(sc, DM_IMR, 0x00000000);
CSR_WRITE_4(sc, DM_TXADDR, 0x00000000);
CSR_WRITE_4(sc, DM_RXADDR, 0x00000000);
/*
* Free data in the RX lists.
*/
for (i = 0; i < DM_RX_LIST_CNT; i++) {
if (sc->dm_ldata->dm_rx_list[i].dm_mbuf != NULL) {
m_freem(sc->dm_ldata->dm_rx_list[i].dm_mbuf);
sc->dm_ldata->dm_rx_list[i].dm_mbuf = NULL;
}
}
bzero((char *)&sc->dm_ldata->dm_rx_list,
sizeof(sc->dm_ldata->dm_rx_list));
/*
* Free the TX list buffers.
*/
for (i = 0; i < DM_TX_LIST_CNT; i++) {
if (sc->dm_ldata->dm_tx_list[i].dm_mbuf != NULL) {
m_freem(sc->dm_ldata->dm_tx_list[i].dm_mbuf);
sc->dm_ldata->dm_tx_list[i].dm_mbuf = NULL;
}
}
bzero((char *)&sc->dm_ldata->dm_tx_list,
sizeof(sc->dm_ldata->dm_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 dm_shutdown(dev)
device_t dev;
{
struct dm_softc *sc;
sc = device_get_softc(dev);
dm_reset(sc);
dm_stop(sc);
return;
}
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