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freebsd-skq/sys/pci/if_vr.c
Sam Leffler 5120abbfb4 Drop the driver lock around calls to if_input to avoid a LOR when 
the packets are immediately returned for sending (e.g.  when bridging
or packet forwarding).  There are more efficient ways to do this
but for now use the least intrusive approach.

Reviewed by:	imp, rwatson
2003-11-14 19:00:32 +00:00

1807 lines
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/*
* Copyright (c) 1997, 1998
* Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Bill Paul.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* VIA Rhine fast ethernet PCI NIC driver
*
* Supports various network adapters based on the VIA Rhine
* and Rhine II PCI controllers, including the D-Link DFE530TX.
* Datasheets are available at http://www.via.com.tw.
*
* Written by Bill Paul <wpaul@ctr.columbia.edu>
* Electrical Engineering Department
* Columbia University, New York City
*/
/*
* The VIA Rhine controllers are similar in some respects to the
* the DEC tulip chips, except less complicated. The controller
* uses an MII bus and an external physical layer interface. The
* receiver has a one entry perfect filter and a 64-bit hash table
* multicast filter. Transmit and receive descriptors are similar
* to the tulip.
*
* The Rhine has a serious flaw in its transmit DMA mechanism:
* transmit buffers must be longword aligned. Unfortunately,
* FreeBSD doesn't guarantee that mbufs will be filled in starting
* at longword boundaries, so we have to do a buffer copy before
* transmission.
*/
#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/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 <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#define VR_USEIOSPACE
#include <pci/if_vrreg.h>
MODULE_DEPEND(vr, pci, 1, 1, 1);
MODULE_DEPEND(vr, ether, 1, 1, 1);
MODULE_DEPEND(vr, miibus, 1, 1, 1);
/* "controller miibus0" required. See GENERIC if you get errors here. */
#include "miibus_if.h"
#undef VR_USESWSHIFT
/*
* Various supported device vendors/types and their names.
*/
static struct vr_type vr_devs[] = {
{ VIA_VENDORID, VIA_DEVICEID_RHINE,
"VIA VT3043 Rhine I 10/100BaseTX" },
{ VIA_VENDORID, VIA_DEVICEID_RHINE_II,
"VIA VT86C100A Rhine II 10/100BaseTX" },
{ VIA_VENDORID, VIA_DEVICEID_RHINE_II_2,
"VIA VT6102 Rhine II 10/100BaseTX" },
{ VIA_VENDORID, VIA_DEVICEID_RHINE_III,
"VIA VT6105 Rhine III 10/100BaseTX" },
{ VIA_VENDORID, VIA_DEVICEID_RHINE_III_M,
"VIA VT6105M Rhine III 10/100BaseTX" },
{ DELTA_VENDORID, DELTA_DEVICEID_RHINE_II,
"Delta Electronics Rhine II 10/100BaseTX" },
{ ADDTRON_VENDORID, ADDTRON_DEVICEID_RHINE_II,
"Addtron Technology Rhine II 10/100BaseTX" },
{ 0, 0, NULL }
};
static int vr_probe (device_t);
static int vr_attach (device_t);
static int vr_detach (device_t);
static int vr_newbuf (struct vr_softc *,
struct vr_chain_onefrag *,
struct mbuf *);
static int vr_encap (struct vr_softc *, struct vr_chain *,
struct mbuf * );
static void vr_rxeof (struct vr_softc *);
static void vr_rxeoc (struct vr_softc *);
static void vr_txeof (struct vr_softc *);
static void vr_txeoc (struct vr_softc *);
static void vr_tick (void *);
static void vr_intr (void *);
static void vr_start (struct ifnet *);
static int vr_ioctl (struct ifnet *, u_long, caddr_t);
static void vr_init (void *);
static void vr_stop (struct vr_softc *);
static void vr_watchdog (struct ifnet *);
static void vr_shutdown (device_t);
static int vr_ifmedia_upd (struct ifnet *);
static void vr_ifmedia_sts (struct ifnet *, struct ifmediareq *);
#ifdef VR_USESWSHIFT
static void vr_mii_sync (struct vr_softc *);
static void vr_mii_send (struct vr_softc *, u_int32_t, int);
#endif
static int vr_mii_readreg (struct vr_softc *, struct vr_mii_frame *);
static int vr_mii_writereg (struct vr_softc *, struct vr_mii_frame *);
static int vr_miibus_readreg (device_t, int, int);
static int vr_miibus_writereg (device_t, int, int, int);
static void vr_miibus_statchg (device_t);
static void vr_setcfg (struct vr_softc *, int);
static u_int32_t vr_mchash (caddr_t);
static void vr_setmulti (struct vr_softc *);
static void vr_reset (struct vr_softc *);
static int vr_list_rx_init (struct vr_softc *);
static int vr_list_tx_init (struct vr_softc *);
#ifdef VR_USEIOSPACE
#define VR_RES SYS_RES_IOPORT
#define VR_RID VR_PCI_LOIO
#else
#define VR_RES SYS_RES_MEMORY
#define VR_RID VR_PCI_LOMEM
#endif
static device_method_t vr_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, vr_probe),
DEVMETHOD(device_attach, vr_attach),
DEVMETHOD(device_detach, vr_detach),
DEVMETHOD(device_shutdown, vr_shutdown),
/* bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_driver_added, bus_generic_driver_added),
/* MII interface */
DEVMETHOD(miibus_readreg, vr_miibus_readreg),
DEVMETHOD(miibus_writereg, vr_miibus_writereg),
DEVMETHOD(miibus_statchg, vr_miibus_statchg),
{ 0, 0 }
};
static driver_t vr_driver = {
"vr",
vr_methods,
sizeof(struct vr_softc)
};
static devclass_t vr_devclass;
DRIVER_MODULE(vr, pci, vr_driver, vr_devclass, 0, 0);
DRIVER_MODULE(miibus, vr, miibus_driver, miibus_devclass, 0, 0);
#define VR_SETBIT(sc, reg, x) \
CSR_WRITE_1(sc, reg, \
CSR_READ_1(sc, reg) | (x))
#define VR_CLRBIT(sc, reg, x) \
CSR_WRITE_1(sc, reg, \
CSR_READ_1(sc, reg) & ~(x))
#define VR_SETBIT16(sc, reg, x) \
CSR_WRITE_2(sc, reg, \
CSR_READ_2(sc, reg) | (x))
#define VR_CLRBIT16(sc, reg, x) \
CSR_WRITE_2(sc, reg, \
CSR_READ_2(sc, reg) & ~(x))
#define VR_SETBIT32(sc, reg, x) \
CSR_WRITE_4(sc, reg, \
CSR_READ_4(sc, reg) | (x))
#define VR_CLRBIT32(sc, reg, x) \
CSR_WRITE_4(sc, reg, \
CSR_READ_4(sc, reg) & ~(x))
#define SIO_SET(x) \
CSR_WRITE_1(sc, VR_MIICMD, \
CSR_READ_1(sc, VR_MIICMD) | (x))
#define SIO_CLR(x) \
CSR_WRITE_1(sc, VR_MIICMD, \
CSR_READ_1(sc, VR_MIICMD) & ~(x))
#ifdef VR_USESWSHIFT
/*
* Sync the PHYs by setting data bit and strobing the clock 32 times.
*/
static void
vr_mii_sync(sc)
struct vr_softc *sc;
{
register int i;
SIO_SET(VR_MIICMD_DIR|VR_MIICMD_DATAIN);
for (i = 0; i < 32; i++) {
SIO_SET(VR_MIICMD_CLK);
DELAY(1);
SIO_CLR(VR_MIICMD_CLK);
DELAY(1);
}
return;
}
/*
* Clock a series of bits through the MII.
*/
static void
vr_mii_send(sc, bits, cnt)
struct vr_softc *sc;
u_int32_t bits;
int cnt;
{
int i;
SIO_CLR(VR_MIICMD_CLK);
for (i = (0x1 << (cnt - 1)); i; i >>= 1) {
if (bits & i) {
SIO_SET(VR_MIICMD_DATAIN);
} else {
SIO_CLR(VR_MIICMD_DATAIN);
}
DELAY(1);
SIO_CLR(VR_MIICMD_CLK);
DELAY(1);
SIO_SET(VR_MIICMD_CLK);
}
}
#endif
/*
* Read an PHY register through the MII.
*/
static int
vr_mii_readreg(sc, frame)
struct vr_softc *sc;
struct vr_mii_frame *frame;
#ifdef VR_USESWSHIFT
{
int i, ack;
VR_LOCK(sc);
/*
* Set up frame for RX.
*/
frame->mii_stdelim = VR_MII_STARTDELIM;
frame->mii_opcode = VR_MII_READOP;
frame->mii_turnaround = 0;
frame->mii_data = 0;
CSR_WRITE_1(sc, VR_MIICMD, 0);
VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_DIRECTPGM);
/*
* Turn on data xmit.
*/
SIO_SET(VR_MIICMD_DIR);
vr_mii_sync(sc);
/*
* Send command/address info.
*/
vr_mii_send(sc, frame->mii_stdelim, 2);
vr_mii_send(sc, frame->mii_opcode, 2);
vr_mii_send(sc, frame->mii_phyaddr, 5);
vr_mii_send(sc, frame->mii_regaddr, 5);
/* Idle bit */
SIO_CLR((VR_MIICMD_CLK|VR_MIICMD_DATAIN));
DELAY(1);
SIO_SET(VR_MIICMD_CLK);
DELAY(1);
/* Turn off xmit. */
SIO_CLR(VR_MIICMD_DIR);
/* Check for ack */
SIO_CLR(VR_MIICMD_CLK);
DELAY(1);
ack = CSR_READ_4(sc, VR_MIICMD) & VR_MIICMD_DATAOUT;
SIO_SET(VR_MIICMD_CLK);
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++) {
SIO_CLR(VR_MIICMD_CLK);
DELAY(1);
SIO_SET(VR_MIICMD_CLK);
DELAY(1);
}
goto fail;
}
for (i = 0x8000; i; i >>= 1) {
SIO_CLR(VR_MIICMD_CLK);
DELAY(1);
if (!ack) {
if (CSR_READ_4(sc, VR_MIICMD) & VR_MIICMD_DATAOUT)
frame->mii_data |= i;
DELAY(1);
}
SIO_SET(VR_MIICMD_CLK);
DELAY(1);
}
fail:
SIO_CLR(VR_MIICMD_CLK);
DELAY(1);
SIO_SET(VR_MIICMD_CLK);
DELAY(1);
VR_UNLOCK(sc);
if (ack)
return(1);
return(0);
}
#else
{
int s, i;
s = splimp();
/* Set the PHY-adress */
CSR_WRITE_1(sc, VR_PHYADDR, (CSR_READ_1(sc, VR_PHYADDR)& 0xe0)|
frame->mii_phyaddr);
/* Set the register-adress */
CSR_WRITE_1(sc, VR_MIIADDR, frame->mii_regaddr);
VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_READ_ENB);
for (i = 0; i < 10000; i++) {
if ((CSR_READ_1(sc, VR_MIICMD) & VR_MIICMD_READ_ENB) == 0)
break;
DELAY(1);
}
frame->mii_data = CSR_READ_2(sc, VR_MIIDATA);
(void)splx(s);
return(0);
}
#endif
/*
* Write to a PHY register through the MII.
*/
static int
vr_mii_writereg(sc, frame)
struct vr_softc *sc;
struct vr_mii_frame *frame;
#ifdef VR_USESWSHIFT
{
VR_LOCK(sc);
CSR_WRITE_1(sc, VR_MIICMD, 0);
VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_DIRECTPGM);
/*
* Set up frame for TX.
*/
frame->mii_stdelim = VR_MII_STARTDELIM;
frame->mii_opcode = VR_MII_WRITEOP;
frame->mii_turnaround = VR_MII_TURNAROUND;
/*
* Turn on data output.
*/
SIO_SET(VR_MIICMD_DIR);
vr_mii_sync(sc);
vr_mii_send(sc, frame->mii_stdelim, 2);
vr_mii_send(sc, frame->mii_opcode, 2);
vr_mii_send(sc, frame->mii_phyaddr, 5);
vr_mii_send(sc, frame->mii_regaddr, 5);
vr_mii_send(sc, frame->mii_turnaround, 2);
vr_mii_send(sc, frame->mii_data, 16);
/* Idle bit. */
SIO_SET(VR_MIICMD_CLK);
DELAY(1);
SIO_CLR(VR_MIICMD_CLK);
DELAY(1);
/*
* Turn off xmit.
*/
SIO_CLR(VR_MIICMD_DIR);
VR_UNLOCK(sc);
return(0);
}
#else
{
int s, i;
s = splimp();
/* Set the PHY-adress */
CSR_WRITE_1(sc, VR_PHYADDR, (CSR_READ_1(sc, VR_PHYADDR)& 0xe0)|
frame->mii_phyaddr);
/* Set the register-adress and data to write */
CSR_WRITE_1(sc, VR_MIIADDR, frame->mii_regaddr);
CSR_WRITE_2(sc, VR_MIIDATA, frame->mii_data);
VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_WRITE_ENB);
for (i = 0; i < 10000; i++) {
if ((CSR_READ_1(sc, VR_MIICMD) & VR_MIICMD_WRITE_ENB) == 0)
break;
DELAY(1);
}
(void)splx(s);
return(0);
}
#endif
static int
vr_miibus_readreg(dev, phy, reg)
device_t dev;
int phy, reg;
{
struct vr_softc *sc;
struct vr_mii_frame frame;
sc = device_get_softc(dev);
switch (sc->vr_revid) {
case REV_ID_VT6102_APOLLO:
if (phy != 1)
return 0;
default:
break;
}
bzero((char *)&frame, sizeof(frame));
frame.mii_phyaddr = phy;
frame.mii_regaddr = reg;
vr_mii_readreg(sc, &frame);
return(frame.mii_data);
}
static int
vr_miibus_writereg(dev, phy, reg, data)
device_t dev;
u_int16_t phy, reg, data;
{
struct vr_softc *sc;
struct vr_mii_frame frame;
sc = device_get_softc(dev);
switch (sc->vr_revid) {
case REV_ID_VT6102_APOLLO:
if (phy != 1)
return 0;
default:
break;
}
bzero((char *)&frame, sizeof(frame));
frame.mii_phyaddr = phy;
frame.mii_regaddr = reg;
frame.mii_data = data;
vr_mii_writereg(sc, &frame);
return(0);
}
static void
vr_miibus_statchg(dev)
device_t dev;
{
struct vr_softc *sc;
struct mii_data *mii;
sc = device_get_softc(dev);
VR_LOCK(sc);
mii = device_get_softc(sc->vr_miibus);
vr_setcfg(sc, mii->mii_media_active);
VR_UNLOCK(sc);
return;
}
/*
* Calculate CRC of a multicast group address, return the lower 6 bits.
*/
static u_int32_t
vr_mchash(addr)
caddr_t addr;
{
u_int32_t crc, carry;
int idx, bit;
u_int8_t data;
/* 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) {
carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01);
crc <<= 1;
if (carry)
crc = (crc ^ 0x04c11db6) | carry;
}
}
/* return the filter bit position */
return((crc >> 26) & 0x0000003F);
}
/*
* Program the 64-bit multicast hash filter.
*/
static void
vr_setmulti(sc)
struct vr_softc *sc;
{
struct ifnet *ifp;
int h = 0;
u_int32_t hashes[2] = { 0, 0 };
struct ifmultiaddr *ifma;
u_int8_t rxfilt;
int mcnt = 0;
ifp = &sc->arpcom.ac_if;
rxfilt = CSR_READ_1(sc, VR_RXCFG);
if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
rxfilt |= VR_RXCFG_RX_MULTI;
CSR_WRITE_1(sc, VR_RXCFG, rxfilt);
CSR_WRITE_4(sc, VR_MAR0, 0xFFFFFFFF);
CSR_WRITE_4(sc, VR_MAR1, 0xFFFFFFFF);
return;
}
/* first, zot all the existing hash bits */
CSR_WRITE_4(sc, VR_MAR0, 0);
CSR_WRITE_4(sc, VR_MAR1, 0);
/* now program new ones */
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
h = vr_mchash(LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
if (h < 32)
hashes[0] |= (1 << h);
else
hashes[1] |= (1 << (h - 32));
mcnt++;
}
if (mcnt)
rxfilt |= VR_RXCFG_RX_MULTI;
else
rxfilt &= ~VR_RXCFG_RX_MULTI;
CSR_WRITE_4(sc, VR_MAR0, hashes[0]);
CSR_WRITE_4(sc, VR_MAR1, hashes[1]);
CSR_WRITE_1(sc, VR_RXCFG, rxfilt);
return;
}
/*
* In order to fiddle with the
* 'full-duplex' and '100Mbps' bits in the netconfig register, we
* first have to put the transmit and/or receive logic in the idle state.
*/
static void
vr_setcfg(sc, media)
struct vr_softc *sc;
int media;
{
int restart = 0;
if (CSR_READ_2(sc, VR_COMMAND) & (VR_CMD_TX_ON|VR_CMD_RX_ON)) {
restart = 1;
VR_CLRBIT16(sc, VR_COMMAND, (VR_CMD_TX_ON|VR_CMD_RX_ON));
}
if ((media & IFM_GMASK) == IFM_FDX)
VR_SETBIT16(sc, VR_COMMAND, VR_CMD_FULLDUPLEX);
else
VR_CLRBIT16(sc, VR_COMMAND, VR_CMD_FULLDUPLEX);
if (restart)
VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_ON|VR_CMD_RX_ON);
return;
}
static void
vr_reset(sc)
struct vr_softc *sc;
{
register int i;
VR_SETBIT16(sc, VR_COMMAND, VR_CMD_RESET);
for (i = 0; i < VR_TIMEOUT; i++) {
DELAY(10);
if (!(CSR_READ_2(sc, VR_COMMAND) & VR_CMD_RESET))
break;
}
if (i == VR_TIMEOUT) {
if (sc->vr_revid < REV_ID_VT3065_A)
printf("vr%d: reset never completed!\n", sc->vr_unit);
else {
/* Use newer force reset command */
printf("vr%d: Using force reset command.\n", sc->vr_unit);
VR_SETBIT(sc, VR_MISC_CR1, VR_MISCCR1_FORSRST);
}
}
/* Wait a little while for the chip to get its brains in order. */
DELAY(1000);
return;
}
/*
* Probe for a VIA Rhine chip. Check the PCI vendor and device
* IDs against our list and return a device name if we find a match.
*/
static int
vr_probe(dev)
device_t dev;
{
struct vr_type *t;
t = vr_devs;
while(t->vr_name != NULL) {
if ((pci_get_vendor(dev) == t->vr_vid) &&
(pci_get_device(dev) == t->vr_did)) {
device_set_desc(dev, t->vr_name);
return(0);
}
t++;
}
return(ENXIO);
}
/*
* Attach the interface. Allocate softc structures, do ifmedia
* setup and ethernet/BPF attach.
*/
static int
vr_attach(dev)
device_t dev;
{
int i;
u_char eaddr[ETHER_ADDR_LEN];
struct vr_softc *sc;
struct ifnet *ifp;
int unit, error = 0, rid;
sc = device_get_softc(dev);
unit = device_get_unit(dev);
mtx_init(&sc->vr_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
MTX_DEF | MTX_RECURSE);
#ifndef BURN_BRIDGES
/*
* Handle power management nonsense.
*/
if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
u_int32_t iobase, membase, irq;
/* Save important PCI config data. */
iobase = pci_read_config(dev, VR_PCI_LOIO, 4);
membase = pci_read_config(dev, VR_PCI_LOMEM, 4);
irq = pci_read_config(dev, VR_PCI_INTLINE, 4);
/* Reset the power state. */
printf("vr%d: chip is in D%d power mode "
"-- setting to D0\n", unit,
pci_get_powerstate(dev));
pci_set_powerstate(dev, PCI_POWERSTATE_D0);
/* Restore PCI config data. */
pci_write_config(dev, VR_PCI_LOIO, iobase, 4);
pci_write_config(dev, VR_PCI_LOMEM, membase, 4);
pci_write_config(dev, VR_PCI_INTLINE, irq, 4);
}
#endif
/*
* Map control/status registers.
*/
pci_enable_busmaster(dev);
sc->vr_revid = pci_read_config(dev, VR_PCI_REVID, 4) & 0x000000FF;
rid = VR_RID;
sc->vr_res = bus_alloc_resource(dev, VR_RES, &rid,
0, ~0, 1, RF_ACTIVE);
if (sc->vr_res == NULL) {
printf("vr%d: couldn't map ports/memory\n", unit);
error = ENXIO;
goto fail;
}
sc->vr_btag = rman_get_bustag(sc->vr_res);
sc->vr_bhandle = rman_get_bushandle(sc->vr_res);
/* Allocate interrupt */
rid = 0;
sc->vr_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
RF_SHAREABLE | RF_ACTIVE);
if (sc->vr_irq == NULL) {
printf("vr%d: couldn't map interrupt\n", unit);
error = ENXIO;
goto fail;
}
/*
* Windows may put the chip in suspend mode when it
* shuts down. Be sure to kick it in the head to wake it
* up again.
*/
VR_CLRBIT(sc, VR_STICKHW, (VR_STICKHW_DS0|VR_STICKHW_DS1));
/* Reset the adapter. */
vr_reset(sc);
/*
* Turn on bit2 (MIION) in PCI configuration register 0x53 during
* initialization and disable AUTOPOLL.
*/
pci_write_config(dev, VR_PCI_MODE,
pci_read_config(dev, VR_PCI_MODE, 4) | (VR_MODE3_MIION << 24), 4);
VR_CLRBIT(sc, VR_MIICMD, VR_MIICMD_AUTOPOLL);
/*
* Get station address. The way the Rhine chips work,
* you're not allowed to directly access the EEPROM once
* they've been programmed a special way. Consequently,
* we need to read the node address from the PAR0 and PAR1
* registers.
*/
VR_SETBIT(sc, VR_EECSR, VR_EECSR_LOAD);
DELAY(200);
for (i = 0; i < ETHER_ADDR_LEN; i++)
eaddr[i] = CSR_READ_1(sc, VR_PAR0 + i);
/*
* A Rhine chip was detected. Inform the world.
*/
printf("vr%d: Ethernet address: %6D\n", unit, eaddr, ":");
sc->vr_unit = unit;
bcopy(eaddr, (char *)&sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
sc->vr_ldata = contigmalloc(sizeof(struct vr_list_data), M_DEVBUF,
M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0);
if (sc->vr_ldata == NULL) {
printf("vr%d: no memory for list buffers!\n", unit);
error = ENXIO;
goto fail;
}
bzero(sc->vr_ldata, sizeof(struct vr_list_data));
ifp = &sc->arpcom.ac_if;
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 = vr_ioctl;
ifp->if_output = ether_output;
ifp->if_start = vr_start;
ifp->if_watchdog = vr_watchdog;
ifp->if_init = vr_init;
ifp->if_baudrate = 10000000;
ifp->if_snd.ifq_maxlen = VR_TX_LIST_CNT - 1;
/*
* Do MII setup.
*/
if (mii_phy_probe(dev, &sc->vr_miibus,
vr_ifmedia_upd, vr_ifmedia_sts)) {
printf("vr%d: MII without any phy!\n", sc->vr_unit);
error = ENXIO;
goto fail;
}
callout_handle_init(&sc->vr_stat_ch);
/*
* Call MI attach routine.
*/
ether_ifattach(ifp, eaddr);
/* Hook interrupt last to avoid having to lock softc */
error = bus_setup_intr(dev, sc->vr_irq, INTR_TYPE_NET,
vr_intr, sc, &sc->vr_intrhand);
if (error) {
printf("vr%d: couldn't set up irq\n", unit);
ether_ifdetach(ifp);
goto fail;
}
fail:
if (error)
vr_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
vr_detach(dev)
device_t dev;
{
struct vr_softc *sc;
struct ifnet *ifp;
sc = device_get_softc(dev);
KASSERT(mtx_initialized(&sc->vr_mtx), ("vr mutex not initialized"));
VR_LOCK(sc);
ifp = &sc->arpcom.ac_if;
/* These should only be active if attach succeeded */
if (device_is_attached(dev)) {
vr_stop(sc);
ether_ifdetach(ifp);
}
if (sc->vr_miibus)
device_delete_child(dev, sc->vr_miibus);
bus_generic_detach(dev);
if (sc->vr_intrhand)
bus_teardown_intr(dev, sc->vr_irq, sc->vr_intrhand);
if (sc->vr_irq)
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->vr_irq);
if (sc->vr_res)
bus_release_resource(dev, VR_RES, VR_RID, sc->vr_res);
if (sc->vr_ldata)
contigfree(sc->vr_ldata, sizeof(struct vr_list_data), M_DEVBUF);
VR_UNLOCK(sc);
mtx_destroy(&sc->vr_mtx);
return(0);
}
/*
* Initialize the transmit descriptors.
*/
static int
vr_list_tx_init(sc)
struct vr_softc *sc;
{
struct vr_chain_data *cd;
struct vr_list_data *ld;
int i;
cd = &sc->vr_cdata;
ld = sc->vr_ldata;
for (i = 0; i < VR_TX_LIST_CNT; i++) {
cd->vr_tx_chain[i].vr_ptr = &ld->vr_tx_list[i];
if (i == (VR_TX_LIST_CNT - 1))
cd->vr_tx_chain[i].vr_nextdesc =
&cd->vr_tx_chain[0];
else
cd->vr_tx_chain[i].vr_nextdesc =
&cd->vr_tx_chain[i + 1];
}
cd->vr_tx_free = &cd->vr_tx_chain[0];
cd->vr_tx_tail = cd->vr_tx_head = NULL;
return(0);
}
/*
* Initialize the RX descriptors and allocate mbufs for them. Note that
* we arrange the descriptors in a closed ring, so that the last descriptor
* points back to the first.
*/
static int
vr_list_rx_init(sc)
struct vr_softc *sc;
{
struct vr_chain_data *cd;
struct vr_list_data *ld;
int i;
cd = &sc->vr_cdata;
ld = sc->vr_ldata;
for (i = 0; i < VR_RX_LIST_CNT; i++) {
cd->vr_rx_chain[i].vr_ptr =
(struct vr_desc *)&ld->vr_rx_list[i];
if (vr_newbuf(sc, &cd->vr_rx_chain[i], NULL) == ENOBUFS)
return(ENOBUFS);
if (i == (VR_RX_LIST_CNT - 1)) {
cd->vr_rx_chain[i].vr_nextdesc =
&cd->vr_rx_chain[0];
ld->vr_rx_list[i].vr_next =
vtophys(&ld->vr_rx_list[0]);
} else {
cd->vr_rx_chain[i].vr_nextdesc =
&cd->vr_rx_chain[i + 1];
ld->vr_rx_list[i].vr_next =
vtophys(&ld->vr_rx_list[i + 1]);
}
}
cd->vr_rx_head = &cd->vr_rx_chain[0];
return(0);
}
/*
* Initialize an RX descriptor and attach an MBUF cluster.
* Note: the length fields are only 11 bits wide, which means the
* largest size we can specify is 2047. This is important because
* MCLBYTES is 2048, so we have to subtract one otherwise we'll
* overflow the field and make a mess.
*/
static int
vr_newbuf(sc, c, m)
struct vr_softc *sc;
struct vr_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, sizeof(u_int64_t));
c->vr_mbuf = m_new;
c->vr_ptr->vr_status = VR_RXSTAT;
c->vr_ptr->vr_data = vtophys(mtod(m_new, caddr_t));
c->vr_ptr->vr_ctl = VR_RXCTL | VR_RXLEN;
return(0);
}
/*
* A frame has been uploaded: pass the resulting mbuf chain up to
* the higher level protocols.
*/
static void
vr_rxeof(sc)
struct vr_softc *sc;
{
struct mbuf *m;
struct ifnet *ifp;
struct vr_chain_onefrag *cur_rx;
int total_len = 0;
u_int32_t rxstat;
VR_LOCK_ASSERT(sc);
ifp = &sc->arpcom.ac_if;
while(!((rxstat = sc->vr_cdata.vr_rx_head->vr_ptr->vr_status) &
VR_RXSTAT_OWN)) {
struct mbuf *m0 = NULL;
cur_rx = sc->vr_cdata.vr_rx_head;
sc->vr_cdata.vr_rx_head = cur_rx->vr_nextdesc;
m = cur_rx->vr_mbuf;
/*
* 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 & VR_RXSTAT_RXERR) {
ifp->if_ierrors++;
printf("vr%d: rx error (%02x):",
sc->vr_unit, rxstat & 0x000000ff);
if (rxstat & VR_RXSTAT_CRCERR)
printf(" crc error");
if (rxstat & VR_RXSTAT_FRAMEALIGNERR)
printf(" frame alignment error\n");
if (rxstat & VR_RXSTAT_FIFOOFLOW)
printf(" FIFO overflow");
if (rxstat & VR_RXSTAT_GIANT)
printf(" received giant packet");
if (rxstat & VR_RXSTAT_RUNT)
printf(" received runt packet");
if (rxstat & VR_RXSTAT_BUSERR)
printf(" system bus error");
if (rxstat & VR_RXSTAT_BUFFERR)
printf("rx buffer error");
printf("\n");
vr_newbuf(sc, cur_rx, m);
continue;
}
/* No errors; receive the packet. */
total_len = VR_RXBYTES(cur_rx->vr_ptr->vr_status);
/*
* XXX The VIA Rhine chip includes the CRC with every
* received frame, and there's no way to turn this
* behavior off (at least, I can't find anything in
* the manual that explains how to do it) so we have
* to trim off the CRC manually.
*/
total_len -= ETHER_CRC_LEN;
m0 = m_devget(mtod(m, char *), total_len, ETHER_ALIGN, ifp,
NULL);
vr_newbuf(sc, cur_rx, m);
if (m0 == NULL) {
ifp->if_ierrors++;
continue;
}
m = m0;
ifp->if_ipackets++;
VR_UNLOCK(sc);
(*ifp->if_input)(ifp, m);
VR_LOCK(sc);
}
return;
}
static void
vr_rxeoc(sc)
struct vr_softc *sc;
{
struct ifnet *ifp;
int i;
ifp = &sc->arpcom.ac_if;
ifp->if_ierrors++;
VR_CLRBIT16(sc, VR_COMMAND, VR_CMD_RX_ON);
DELAY(10000);
for (i = 0x400;
i && (CSR_READ_2(sc, VR_COMMAND) & VR_CMD_RX_ON);
i--)
; /* Wait for receiver to stop */
if (!i) {
printf("vr%d: rx shutdown error!\n", sc->vr_unit);
sc->vr_flags |= VR_F_RESTART;
return;
}
vr_rxeof(sc);
CSR_WRITE_4(sc, VR_RXADDR, vtophys(sc->vr_cdata.vr_rx_head->vr_ptr));
VR_SETBIT16(sc, VR_COMMAND, VR_CMD_RX_ON);
VR_SETBIT16(sc, VR_COMMAND, VR_CMD_RX_GO);
return;
}
/*
* A frame was downloaded to the chip. It's safe for us to clean up
* the list buffers.
*/
static void
vr_txeof(sc)
struct vr_softc *sc;
{
struct vr_chain *cur_tx;
struct ifnet *ifp;
ifp = &sc->arpcom.ac_if;
/* Reset the timeout timer; if_txeoc will clear it. */
ifp->if_timer = 5;
/* Sanity check. */
if (sc->vr_cdata.vr_tx_head == NULL)
return;
/*
* Go through our tx list and free mbufs for those
* frames that have been transmitted.
*/
while(sc->vr_cdata.vr_tx_head->vr_mbuf != NULL) {
u_int32_t txstat;
int i;
cur_tx = sc->vr_cdata.vr_tx_head;
txstat = cur_tx->vr_ptr->vr_status;
if ((txstat & VR_TXSTAT_ABRT) ||
(txstat & VR_TXSTAT_UDF)) {
for (i = 0x400;
i && (CSR_READ_2(sc, VR_COMMAND) & VR_CMD_TX_ON);
i--)
; /* Wait for chip to shutdown */
if (!i) {
printf("vr%d: tx shutdown timeout\n", sc->vr_unit);
sc->vr_flags |= VR_F_RESTART;
break;
}
VR_TXOWN(cur_tx) = VR_TXSTAT_OWN;
CSR_WRITE_4(sc, VR_TXADDR, vtophys(cur_tx->vr_ptr));
break;
}
if (txstat & VR_TXSTAT_OWN)
break;
if (txstat & VR_TXSTAT_ERRSUM) {
ifp->if_oerrors++;
if (txstat & VR_TXSTAT_DEFER)
ifp->if_collisions++;
if (txstat & VR_TXSTAT_LATECOLL)
ifp->if_collisions++;
}
ifp->if_collisions +=(txstat & VR_TXSTAT_COLLCNT) >> 3;
ifp->if_opackets++;
if (cur_tx->vr_mbuf != NULL) {
m_freem(cur_tx->vr_mbuf);
cur_tx->vr_mbuf = NULL;
}
if (sc->vr_cdata.vr_tx_head == sc->vr_cdata.vr_tx_tail) {
sc->vr_cdata.vr_tx_head = NULL;
sc->vr_cdata.vr_tx_tail = NULL;
break;
}
sc->vr_cdata.vr_tx_head = cur_tx->vr_nextdesc;
}
return;
}
/*
* TX 'end of channel' interrupt handler.
*/
static void
vr_txeoc(sc)
struct vr_softc *sc;
{
struct ifnet *ifp;
ifp = &sc->arpcom.ac_if;
if (sc->vr_cdata.vr_tx_head == NULL) {
ifp->if_flags &= ~IFF_OACTIVE;
sc->vr_cdata.vr_tx_tail = NULL;
ifp->if_timer = 0;
}
return;
}
static void
vr_tick(xsc)
void *xsc;
{
struct vr_softc *sc;
struct mii_data *mii;
sc = xsc;
VR_LOCK(sc);
if (sc->vr_flags & VR_F_RESTART) {
printf("vr%d: restarting\n", sc->vr_unit);
vr_stop(sc);
vr_reset(sc);
vr_init(sc);
sc->vr_flags &= ~VR_F_RESTART;
}
mii = device_get_softc(sc->vr_miibus);
mii_tick(mii);
sc->vr_stat_ch = timeout(vr_tick, sc, hz);
VR_UNLOCK(sc);
return;
}
static void
vr_intr(arg)
void *arg;
{
struct vr_softc *sc;
struct ifnet *ifp;
u_int16_t status;
sc = arg;
VR_LOCK(sc);
ifp = &sc->arpcom.ac_if;
/* Supress unwanted interrupts. */
if (!(ifp->if_flags & IFF_UP)) {
vr_stop(sc);
VR_UNLOCK(sc);
return;
}
/* Disable interrupts. */
CSR_WRITE_2(sc, VR_IMR, 0x0000);
for (;;) {
status = CSR_READ_2(sc, VR_ISR);
if (status)
CSR_WRITE_2(sc, VR_ISR, status);
if ((status & VR_INTRS) == 0)
break;
if (status & VR_ISR_RX_OK)
vr_rxeof(sc);
if (status & VR_ISR_RX_DROPPED) {
printf("vr%d: rx packet lost\n", sc->vr_unit);
ifp->if_ierrors++;
}
if ((status & VR_ISR_RX_ERR) || (status & VR_ISR_RX_NOBUF) ||
(status & VR_ISR_RX_NOBUF) || (status & VR_ISR_RX_OFLOW)) {
printf("vr%d: receive error (%04x)",
sc->vr_unit, status);
if (status & VR_ISR_RX_NOBUF)
printf(" no buffers");
if (status & VR_ISR_RX_OFLOW)
printf(" overflow");
if (status & VR_ISR_RX_DROPPED)
printf(" packet lost");
printf("\n");
vr_rxeoc(sc);
}
if ((status & VR_ISR_BUSERR) || (status & VR_ISR_TX_UNDERRUN)) {
vr_reset(sc);
vr_init(sc);
break;
}
if ((status & VR_ISR_TX_OK) || (status & VR_ISR_TX_ABRT) ||
(status & VR_ISR_TX_ABRT2) || (status & VR_ISR_UDFI)) {
vr_txeof(sc);
if ((status & VR_ISR_UDFI) ||
(status & VR_ISR_TX_ABRT2) ||
(status & VR_ISR_TX_ABRT)) {
ifp->if_oerrors++;
if (sc->vr_cdata.vr_tx_head != NULL) {
VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_ON);
VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_GO);
}
} else
vr_txeoc(sc);
}
}
/* Re-enable interrupts. */
CSR_WRITE_2(sc, VR_IMR, VR_INTRS);
if (ifp->if_snd.ifq_head != NULL) {
vr_start(ifp);
}
VR_UNLOCK(sc);
return;
}
/*
* Encapsulate an mbuf chain in a descriptor by coupling the mbuf data
* pointers to the fragment pointers.
*/
static int
vr_encap(sc, c, m_head)
struct vr_softc *sc;
struct vr_chain *c;
struct mbuf *m_head;
{
int frag = 0;
struct vr_desc *f = NULL;
int total_len;
struct mbuf *m;
m = m_head;
total_len = 0;
/*
* The VIA Rhine wants packet buffers to be longword
* aligned, but very often our mbufs aren't. Rather than
* waste time trying to decide when to copy and when not
* to copy, just do it all the time.
*/
if (m != NULL) {
struct mbuf *m_new = NULL;
m_new = m_defrag(m_head, M_DONTWAIT);
if (m_new == NULL) {
return(1);
}
m_head = m_new;
/*
* The Rhine chip doesn't auto-pad, so we have to make
* sure to pad short frames out to the minimum frame length
* ourselves.
*/
if (m_head->m_len < VR_MIN_FRAMELEN) {
m_new->m_pkthdr.len += VR_MIN_FRAMELEN - m_new->m_len;
m_new->m_len = m_new->m_pkthdr.len;
}
f = c->vr_ptr;
f->vr_data = vtophys(mtod(m_new, caddr_t));
f->vr_ctl = total_len = m_new->m_len;
f->vr_ctl |= VR_TXCTL_TLINK|VR_TXCTL_FIRSTFRAG;
f->vr_status = 0;
frag = 1;
}
c->vr_mbuf = m_head;
c->vr_ptr->vr_ctl |= VR_TXCTL_LASTFRAG|VR_TXCTL_FINT;
c->vr_ptr->vr_next = vtophys(c->vr_nextdesc->vr_ptr);
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
vr_start(ifp)
struct ifnet *ifp;
{
struct vr_softc *sc;
struct mbuf *m_head = NULL;
struct vr_chain *cur_tx = NULL, *start_tx, *prev_tx;
sc = ifp->if_softc;
VR_LOCK(sc);
/*
* Check for an available queue slot. If there are none,
* punt.
*/
if (sc->vr_cdata.vr_tx_free->vr_mbuf != NULL) {
VR_UNLOCK(sc);
return;
}
start_tx = sc->vr_cdata.vr_tx_free;
while(sc->vr_cdata.vr_tx_free->vr_mbuf == NULL) {
IF_DEQUEUE(&ifp->if_snd, m_head);
if (m_head == NULL)
break;
/* Pick a descriptor off the free list. */
prev_tx = cur_tx;
cur_tx = sc->vr_cdata.vr_tx_free;
sc->vr_cdata.vr_tx_free = cur_tx->vr_nextdesc;
/* Pack the data into the descriptor. */
if (vr_encap(sc, cur_tx, m_head)) {
/* Rollback, send what we were able to encap. */
IF_PREPEND(&ifp->if_snd, m_head);
sc->vr_cdata.vr_tx_free = cur_tx;
cur_tx = prev_tx;
break;
}
if (cur_tx != start_tx)
VR_TXOWN(cur_tx) = VR_TXSTAT_OWN;
/*
* If there's a BPF listener, bounce a copy of this frame
* to him.
*/
BPF_MTAP(ifp, cur_tx->vr_mbuf);
VR_TXOWN(cur_tx) = VR_TXSTAT_OWN;
}
/*
* If there are no frames queued, bail.
*/
if (cur_tx == NULL) {
VR_UNLOCK(sc);
return;
}
sc->vr_cdata.vr_tx_tail = cur_tx;
if (sc->vr_cdata.vr_tx_head == NULL)
sc->vr_cdata.vr_tx_head = start_tx;
/* Tell the chip to start transmitting. */
VR_SETBIT16(sc, VR_COMMAND, /*VR_CMD_TX_ON|*/VR_CMD_TX_GO);
/*
* Set a timeout in case the chip goes out to lunch.
*/
ifp->if_timer = 5;
VR_UNLOCK(sc);
return;
}
static void
vr_init(xsc)
void *xsc;
{
struct vr_softc *sc = xsc;
struct ifnet *ifp = &sc->arpcom.ac_if;
struct mii_data *mii;
int i;
VR_LOCK(sc);
mii = device_get_softc(sc->vr_miibus);
/*
* Cancel pending I/O and free all RX/TX buffers.
*/
vr_stop(sc);
vr_reset(sc);
/*
* Set our station address.
*/
for (i = 0; i < ETHER_ADDR_LEN; i++)
CSR_WRITE_1(sc, VR_PAR0 + i, sc->arpcom.ac_enaddr[i]);
/* Set DMA size */
VR_CLRBIT(sc, VR_BCR0, VR_BCR0_DMA_LENGTH);
VR_SETBIT(sc, VR_BCR0, VR_BCR0_DMA_STORENFWD);
/*
* BCR0 and BCR1 can override the RXCFG and TXCFG registers,
* so we must set both.
*/
VR_CLRBIT(sc, VR_BCR0, VR_BCR0_RX_THRESH);
VR_SETBIT(sc, VR_BCR0, VR_BCR0_RXTHRESH128BYTES);
VR_CLRBIT(sc, VR_BCR1, VR_BCR1_TX_THRESH);
VR_SETBIT(sc, VR_BCR1, VR_BCR1_TXTHRESHSTORENFWD);
VR_CLRBIT(sc, VR_RXCFG, VR_RXCFG_RX_THRESH);
VR_SETBIT(sc, VR_RXCFG, VR_RXTHRESH_128BYTES);
VR_CLRBIT(sc, VR_TXCFG, VR_TXCFG_TX_THRESH);
VR_SETBIT(sc, VR_TXCFG, VR_TXTHRESH_STORENFWD);
/* Init circular RX list. */
if (vr_list_rx_init(sc) == ENOBUFS) {
printf("vr%d: initialization failed: no "
"memory for rx buffers\n", sc->vr_unit);
vr_stop(sc);
VR_UNLOCK(sc);
return;
}
/*
* Init tx descriptors.
*/
vr_list_tx_init(sc);
/* If we want promiscuous mode, set the allframes bit. */
if (ifp->if_flags & IFF_PROMISC)
VR_SETBIT(sc, VR_RXCFG, VR_RXCFG_RX_PROMISC);
else
VR_CLRBIT(sc, VR_RXCFG, VR_RXCFG_RX_PROMISC);
/* Set capture broadcast bit to capture broadcast frames. */
if (ifp->if_flags & IFF_BROADCAST)
VR_SETBIT(sc, VR_RXCFG, VR_RXCFG_RX_BROAD);
else
VR_CLRBIT(sc, VR_RXCFG, VR_RXCFG_RX_BROAD);
/*
* Program the multicast filter, if necessary.
*/
vr_setmulti(sc);
/*
* Load the address of the RX list.
*/
CSR_WRITE_4(sc, VR_RXADDR, vtophys(sc->vr_cdata.vr_rx_head->vr_ptr));
/* Enable receiver and transmitter. */
CSR_WRITE_2(sc, VR_COMMAND, VR_CMD_TX_NOPOLL|VR_CMD_START|
VR_CMD_TX_ON|VR_CMD_RX_ON|
VR_CMD_RX_GO);
CSR_WRITE_4(sc, VR_TXADDR, vtophys(&sc->vr_ldata->vr_tx_list[0]));
/*
* Enable interrupts.
*/
CSR_WRITE_2(sc, VR_ISR, 0xFFFF);
CSR_WRITE_2(sc, VR_IMR, VR_INTRS);
mii_mediachg(mii);
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
sc->vr_stat_ch = timeout(vr_tick, sc, hz);
VR_UNLOCK(sc);
return;
}
/*
* Set media options.
*/
static int
vr_ifmedia_upd(ifp)
struct ifnet *ifp;
{
struct vr_softc *sc;
sc = ifp->if_softc;
if (ifp->if_flags & IFF_UP)
vr_init(sc);
return(0);
}
/*
* Report current media status.
*/
static void
vr_ifmedia_sts(ifp, ifmr)
struct ifnet *ifp;
struct ifmediareq *ifmr;
{
struct vr_softc *sc;
struct mii_data *mii;
sc = ifp->if_softc;
mii = device_get_softc(sc->vr_miibus);
mii_pollstat(mii);
ifmr->ifm_active = mii->mii_media_active;
ifmr->ifm_status = mii->mii_media_status;
return;
}
static int
vr_ioctl(ifp, command, data)
struct ifnet *ifp;
u_long command;
caddr_t data;
{
struct vr_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *) data;
struct mii_data *mii;
int error = 0;
VR_LOCK(sc);
switch(command) {
case SIOCSIFFLAGS:
if (ifp->if_flags & IFF_UP) {
vr_init(sc);
} else {
if (ifp->if_flags & IFF_RUNNING)
vr_stop(sc);
}
error = 0;
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
vr_setmulti(sc);
error = 0;
break;
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
mii = device_get_softc(sc->vr_miibus);
error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
break;
default:
error = ether_ioctl(ifp, command, data);
break;
}
VR_UNLOCK(sc);
return(error);
}
static void
vr_watchdog(ifp)
struct ifnet *ifp;
{
struct vr_softc *sc;
sc = ifp->if_softc;
VR_LOCK(sc);
ifp->if_oerrors++;
printf("vr%d: watchdog timeout\n", sc->vr_unit);
vr_stop(sc);
vr_reset(sc);
vr_init(sc);
if (ifp->if_snd.ifq_head != NULL)
vr_start(ifp);
VR_UNLOCK(sc);
return;
}
/*
* Stop the adapter and free any mbufs allocated to the
* RX and TX lists.
*/
static void
vr_stop(sc)
struct vr_softc *sc;
{
register int i;
struct ifnet *ifp;
VR_LOCK(sc);
ifp = &sc->arpcom.ac_if;
ifp->if_timer = 0;
untimeout(vr_tick, sc, sc->vr_stat_ch);
VR_SETBIT16(sc, VR_COMMAND, VR_CMD_STOP);
VR_CLRBIT16(sc, VR_COMMAND, (VR_CMD_RX_ON|VR_CMD_TX_ON));
CSR_WRITE_2(sc, VR_IMR, 0x0000);
CSR_WRITE_4(sc, VR_TXADDR, 0x00000000);
CSR_WRITE_4(sc, VR_RXADDR, 0x00000000);
/*
* Free data in the RX lists.
*/
for (i = 0; i < VR_RX_LIST_CNT; i++) {
if (sc->vr_cdata.vr_rx_chain[i].vr_mbuf != NULL) {
m_freem(sc->vr_cdata.vr_rx_chain[i].vr_mbuf);
sc->vr_cdata.vr_rx_chain[i].vr_mbuf = NULL;
}
}
bzero((char *)&sc->vr_ldata->vr_rx_list,
sizeof(sc->vr_ldata->vr_rx_list));
/*
* Free the TX list buffers.
*/
for (i = 0; i < VR_TX_LIST_CNT; i++) {
if (sc->vr_cdata.vr_tx_chain[i].vr_mbuf != NULL) {
m_freem(sc->vr_cdata.vr_tx_chain[i].vr_mbuf);
sc->vr_cdata.vr_tx_chain[i].vr_mbuf = NULL;
}
}
bzero((char *)&sc->vr_ldata->vr_tx_list,
sizeof(sc->vr_ldata->vr_tx_list));
ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
VR_UNLOCK(sc);
return;
}
/*
* Stop all chip I/O so that the kernel's probe routines don't
* get confused by errant DMAs when rebooting.
*/
static void
vr_shutdown(dev)
device_t dev;
{
struct vr_softc *sc;
sc = device_get_softc(dev);
vr_stop(sc);
return;
}
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